| /* Copyright (c) 2013-2015 the Civetweb developers |
| * Copyright (c) 2004-2013 Sergey Lyubka |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #if defined(_WIN32) |
| #if !defined(_CRT_SECURE_NO_WARNINGS) |
| #define _CRT_SECURE_NO_WARNINGS /* Disable deprecation warning in VS2005 */ |
| #endif |
| #else |
| #ifdef __linux__ |
| #define _XOPEN_SOURCE 600 /* For flockfile() on Linux */ |
| #endif |
| #ifndef _LARGEFILE_SOURCE |
| #define _LARGEFILE_SOURCE /* For fseeko(), ftello() */ |
| #endif |
| #ifndef _FILE_OFFSET_BITS |
| #define _FILE_OFFSET_BITS 64 /* Use 64-bit file offsets by default */ |
| #endif |
| #ifndef __STDC_FORMAT_MACROS |
| #define __STDC_FORMAT_MACROS /* <inttypes.h> wants this for C++ */ |
| #endif |
| #ifndef __STDC_LIMIT_MACROS |
| #define __STDC_LIMIT_MACROS /* C++ wants that for INT64_MAX */ |
| #endif |
| #endif |
| |
| #if defined (_MSC_VER) |
| /* 'type cast' : conversion from 'int' to 'HANDLE' of greater size */ |
| #pragma warning (disable : 4306 ) |
| /* conditional expression is constant: introduced by FD_SET(..) */ |
| #pragma warning (disable : 4127) |
| /* non-constant aggregate initializer: issued due to missing C99 support */ |
| #pragma warning (disable : 4204) |
| #endif |
| |
| /* Disable WIN32_LEAN_AND_MEAN. |
| This makes windows.h always include winsock2.h */ |
| #if defined(WIN32_LEAN_AND_MEAN) |
| #undef WIN32_LEAN_AND_MEAN |
| #endif |
| |
| #if defined USE_IPV6 && defined(_WIN32) |
| #include <ws2tcpip.h> |
| #endif |
| |
| #if defined(__SYMBIAN32__) |
| #define NO_SSL /* SSL is not supported */ |
| #define NO_CGI /* CGI is not supported */ |
| #define PATH_MAX FILENAME_MAX |
| #endif /* __SYMBIAN32__ */ |
| |
| #ifndef IGNORE_UNUSED_RESULT |
| #define IGNORE_UNUSED_RESULT(a) (void)((a) && 1) |
| #endif |
| |
| #ifndef _WIN32_WCE /* Some ANSI #includes are not available on Windows CE */ |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <errno.h> |
| #include <signal.h> |
| #include <fcntl.h> |
| #endif /* !_WIN32_WCE */ |
| |
| #include <time.h> |
| #include <stdlib.h> |
| #include <stdarg.h> |
| #include <assert.h> |
| #include <string.h> |
| #include <ctype.h> |
| #include <limits.h> |
| #include <stddef.h> |
| #include <stdio.h> |
| |
| #ifndef MAX_WORKER_THREADS |
| #define MAX_WORKER_THREADS (1024*64) |
| #endif |
| |
| #if defined(_WIN32) && !defined(__SYMBIAN32__) /* Windows specific */ |
| #if defined(_MSC_VER) && _MSC_VER <= 1400 |
| #undef _WIN32_WINNT |
| #define _WIN32_WINNT 0x0400 /* To make it link in VS2005 */ |
| #endif |
| #include <windows.h> |
| typedef const char * SOCK_OPT_TYPE; |
| |
| #ifndef PATH_MAX |
| #define PATH_MAX MAX_PATH |
| #endif |
| |
| #ifndef _IN_PORT_T |
| #ifndef in_port_t |
| #define in_port_t u_short |
| #endif |
| #endif |
| |
| #ifndef _WIN32_WCE |
| #include <process.h> |
| #include <direct.h> |
| #include <io.h> |
| #else /* _WIN32_WCE */ |
| #define NO_CGI /* WinCE has no pipes */ |
| |
| typedef long off_t; |
| |
| #define errno GetLastError() |
| #define strerror(x) _ultoa(x, (char *) _alloca(sizeof(x) *3 ), 10) |
| #endif /* _WIN32_WCE */ |
| |
| #define MAKEUQUAD(lo, hi) ((uint64_t)(((uint32_t)(lo)) | \ |
| ((uint64_t)((uint32_t)(hi))) << 32)) |
| #define RATE_DIFF 10000000 /* 100 nsecs */ |
| #define EPOCH_DIFF MAKEUQUAD(0xd53e8000, 0x019db1de) |
| #define SYS2UNIX_TIME(lo, hi) \ |
| (time_t) ((MAKEUQUAD((lo), (hi)) - EPOCH_DIFF) / RATE_DIFF) |
| |
| /* Visual Studio 6 does not know __func__ or __FUNCTION__ |
| The rest of MS compilers use __FUNCTION__, not C99 __func__ |
| Also use _strtoui64 on modern M$ compilers */ |
| #if defined(_MSC_VER) && _MSC_VER < 1300 |
| #define STRX(x) #x |
| #define STR(x) STRX(x) |
| #define __func__ __FILE__ ":" STR(__LINE__) |
| #define strtoull(x, y, z) (unsigned __int64) _atoi64(x) |
| #define strtoll(x, y, z) _atoi64(x) |
| #else |
| #define __func__ __FUNCTION__ |
| #define strtoull(x, y, z) _strtoui64(x, y, z) |
| #define strtoll(x, y, z) _strtoi64(x, y, z) |
| #endif /* _MSC_VER */ |
| |
| #define ERRNO GetLastError() |
| #define NO_SOCKLEN_T |
| #define SSL_LIB "ssleay32.dll" |
| #define CRYPTO_LIB "libeay32.dll" |
| #define O_NONBLOCK 0 |
| #define W_OK (2) /* http://msdn.microsoft.com/en-us/library/1w06ktdy.aspx */ |
| #if !defined(EWOULDBLOCK) |
| #define EWOULDBLOCK WSAEWOULDBLOCK |
| #endif /* !EWOULDBLOCK */ |
| #define _POSIX_ |
| #define INT64_FMT "I64d" |
| |
| #define WINCDECL __cdecl |
| #define SHUT_WR 1 |
| #define snprintf _snprintf |
| #define vsnprintf _vsnprintf |
| #define access _access |
| #define mg_sleep(x) Sleep(x) |
| |
| #define pipe(x) _pipe(x, MG_BUF_LEN, _O_BINARY) |
| #ifndef popen |
| #define popen(x, y) _popen(x, y) |
| #endif |
| #ifndef pclose |
| #define pclose(x) _pclose(x) |
| #endif |
| #define close(x) _close(x) |
| #define dlsym(x,y) GetProcAddress((HINSTANCE) (x), (y)) |
| #define RTLD_LAZY 0 |
| #define fseeko(x, y, z) _lseeki64(_fileno(x), (y), (z)) |
| #define fdopen(x, y) _fdopen((x), (y)) |
| #define write(x, y, z) _write((x), (y), (unsigned) z) |
| #define read(x, y, z) _read((x), (y), (unsigned) z) |
| #define flockfile(x) EnterCriticalSection(&global_log_file_lock) |
| #define funlockfile(x) LeaveCriticalSection(&global_log_file_lock) |
| #define sleep(x) Sleep((x) * 1000) |
| #define rmdir(x) _rmdir(x) |
| |
| #if defined(USE_LUA) && defined(USE_WEBSOCKET) |
| #define USE_TIMERS |
| #endif |
| |
| #if !defined(va_copy) |
| #define va_copy(x, y) x = y |
| #endif /* !va_copy MINGW #defines va_copy */ |
| |
| #if !defined(fileno) |
| #define fileno(x) _fileno(x) |
| #endif /* !fileno MINGW #defines fileno */ |
| |
| typedef HANDLE pthread_mutex_t; |
| typedef DWORD pthread_key_t; |
| typedef HANDLE pthread_t; |
| typedef struct { |
| CRITICAL_SECTION threadIdSec; |
| int waitingthreadcount; /* The number of threads queued. */ |
| pthread_t *waitingthreadhdls; /* The thread handles. */ |
| } pthread_cond_t; |
| |
| #ifndef __clockid_t_defined |
| typedef DWORD clockid_t; |
| #endif |
| #ifndef CLOCK_MONOTONIC |
| #define CLOCK_MONOTONIC (1) |
| #endif |
| #ifndef CLOCK_REALTIME |
| #define CLOCK_REALTIME (2) |
| #endif |
| |
| #ifndef _TIMESPEC_DEFINED |
| struct timespec { |
| time_t tv_sec; /* seconds */ |
| long tv_nsec; /* nanoseconds */ |
| }; |
| #endif |
| |
| #define pid_t HANDLE /* MINGW typedefs pid_t to int. Using #define here. */ |
| |
| static int pthread_mutex_lock(pthread_mutex_t *); |
| static int pthread_mutex_unlock(pthread_mutex_t *); |
| static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len); |
| struct file; |
| static char *mg_fgets(char *buf, size_t size, struct file *filep, char **p); |
| |
| #if defined(HAVE_STDINT) |
| #include <stdint.h> |
| #else |
| typedef unsigned int uint32_t; |
| typedef unsigned short uint16_t; |
| typedef unsigned __int64 uint64_t; |
| typedef __int64 int64_t; |
| #define INT64_MAX 9223372036854775807 |
| #endif /* HAVE_STDINT */ |
| |
| /* POSIX dirent interface */ |
| struct dirent { |
| char d_name[PATH_MAX]; |
| }; |
| |
| typedef struct DIR { |
| HANDLE handle; |
| WIN32_FIND_DATAW info; |
| struct dirent result; |
| } DIR; |
| |
| #if !defined(USE_IPV6) && defined(_WIN32) |
| #ifndef HAVE_POLL |
| struct pollfd { |
| SOCKET fd; |
| short events; |
| short revents; |
| }; |
| #define POLLIN 1 |
| #endif |
| #endif |
| |
| /* Mark required libraries */ |
| #ifdef _MSC_VER |
| #pragma comment(lib, "Ws2_32.lib") |
| #endif |
| |
| #else /* UNIX specific */ |
| #include <sys/wait.h> |
| #include <sys/socket.h> |
| #include <sys/poll.h> |
| #include <netinet/in.h> |
| #include <arpa/inet.h> |
| #include <sys/time.h> |
| #include <sys/utsname.h> |
| #include <stdint.h> |
| #include <inttypes.h> |
| #include <netdb.h> |
| typedef const void * SOCK_OPT_TYPE; |
| |
| //#if defined(ANDROID) |
| typedef unsigned short int in_port_t; |
| //#endif |
| |
| #include <pwd.h> |
| #include <unistd.h> |
| #include <dirent.h> |
| #if !defined(NO_SSL_DL) && !defined(NO_SSL) |
| #include <dlfcn.h> |
| #endif |
| #include <pthread.h> |
| #if defined(__MACH__) |
| #define SSL_LIB "libssl.dylib" |
| #define CRYPTO_LIB "libcrypto.dylib" |
| #else |
| #if !defined(SSL_LIB) |
| #define SSL_LIB "libssl.so" |
| #endif |
| #if !defined(CRYPTO_LIB) |
| #define CRYPTO_LIB "libcrypto.so" |
| #endif |
| #endif |
| #ifndef O_BINARY |
| #define O_BINARY 0 |
| #endif /* O_BINARY */ |
| #define closesocket(a) close(a) |
| #define mg_mkdir(x, y) mkdir(x, y) |
| #define mg_remove(x) remove(x) |
| #define mg_sleep(x) usleep((x) * 1000) |
| #define ERRNO errno |
| #define INVALID_SOCKET (-1) |
| #define INT64_FMT PRId64 |
| typedef int SOCKET; |
| #define WINCDECL |
| |
| #endif /* End of Windows and UNIX specific includes */ |
| |
| #ifdef _WIN32 |
| static CRITICAL_SECTION global_log_file_lock; |
| static DWORD pthread_self(void) |
| { |
| return GetCurrentThreadId(); |
| } |
| |
| int pthread_key_create(pthread_key_t *key, void (*_must_be_zero)(void*) /* destructor function not supported for windows */) |
| { |
| assert(_must_be_zero == NULL); |
| if ((key!=0) && (_must_be_zero == NULL)) { |
| *key = TlsAlloc(); |
| return (*key != TLS_OUT_OF_INDEXES) ? 0 : -1; |
| } |
| return -2; |
| } |
| |
| int pthread_key_delete(pthread_key_t key) |
| { |
| return TlsFree(key) ? 0 : 1; |
| } |
| |
| int pthread_setspecific(pthread_key_t key, void * value) |
| { |
| return TlsSetValue(key, value) ? 0 : 1; |
| } |
| |
| void *pthread_getspecific(pthread_key_t key) |
| { |
| return TlsGetValue(key); |
| } |
| #endif /* _WIN32 */ |
| |
| |
| #include "civetweb.h" |
| |
| #define PASSWORDS_FILE_NAME ".htpasswd" |
| #define CGI_ENVIRONMENT_SIZE 4096 |
| #define MAX_CGI_ENVIR_VARS 64 |
| #define MG_BUF_LEN 8192 |
| #ifndef MAX_REQUEST_SIZE |
| #define MAX_REQUEST_SIZE 16384 |
| #endif |
| #define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0])) |
| |
| #if !defined(DEBUG_TRACE) |
| #if defined(DEBUG) |
| |
| static void DEBUG_TRACE_FUNC(const char *func, unsigned line, PRINTF_FORMAT_STRING(const char *fmt), ...) PRINTF_ARGS(3, 4); |
| |
| static void DEBUG_TRACE_FUNC(const char *func, unsigned line, const char *fmt, ...) { |
| |
| va_list args; |
| flockfile(stdout); |
| printf("*** %lu.%p.%s.%u: ", |
| (unsigned long) time(NULL), (void *) pthread_self(), |
| func, line); |
| va_start(args, fmt); |
| vprintf(fmt, args); |
| va_end(args); |
| putchar('\n'); |
| fflush(stdout); |
| funlockfile(stdout); |
| } |
| |
| #define DEBUG_TRACE(fmt, ...) DEBUG_TRACE_FUNC(__func__, __LINE__, fmt, __VA_ARGS__) |
| |
| #else |
| #define DEBUG_TRACE(fmt, ...) |
| #endif /* DEBUG */ |
| #endif /* DEBUG_TRACE */ |
| |
| #if defined(MEMORY_DEBUGGING) |
| static unsigned long blockCount = 0; |
| static unsigned long totalMemUsed = 0; |
| |
| static void * mg_malloc_ex(size_t size, const char * file, unsigned line) { |
| |
| void * data = malloc(size + sizeof(size_t)); |
| void * memory = 0; |
| char mallocStr[256]; |
| |
| if (data) { |
| *(size_t*)data = size; |
| totalMemUsed += size; |
| blockCount++; |
| memory = (void *)(((char*)data)+sizeof(size_t)); |
| } |
| |
| sprintf(mallocStr, "MEM: %p %5lu alloc %7lu %4lu --- %s:%u\n", memory, (unsigned long)size, totalMemUsed, blockCount, file, line); |
| #if defined(_WIN32) |
| OutputDebugStringA(mallocStr); |
| #else |
| DEBUG_TRACE("%s", mallocStr); |
| #endif |
| |
| return memory; |
| } |
| |
| static void * mg_calloc_ex(size_t count, size_t size, const char * file, unsigned line) { |
| |
| void * data = mg_malloc_ex(size*count, file, line); |
| if (data) memset(data, 0, size); |
| |
| return data; |
| } |
| |
| static void mg_free_ex(void * memory, const char * file, unsigned line) { |
| |
| char mallocStr[256]; |
| void * data = (void *)(((char*)memory)-sizeof(size_t)); |
| size_t size; |
| |
| if (memory) { |
| size = *(size_t*)data; |
| totalMemUsed -= size; |
| blockCount--; |
| sprintf(mallocStr, "MEM: %p %5lu free %7lu %4lu --- %s:%u\n", memory, (unsigned long)size, totalMemUsed, blockCount, file, line); |
| #if defined(_WIN32) |
| OutputDebugStringA(mallocStr); |
| #else |
| DEBUG_TRACE("%s", mallocStr); |
| #endif |
| |
| free(data); |
| } |
| } |
| |
| static void * mg_realloc_ex(void * memory, size_t newsize, const char * file, unsigned line) { |
| |
| char mallocStr[256]; |
| void * data; |
| void * _realloc; |
| size_t oldsize; |
| |
| if (newsize) { |
| if (memory) { |
| data = (void *)(((char*)memory)-sizeof(size_t)); |
| oldsize = *(size_t*)data; |
| _realloc = realloc(data, newsize+sizeof(size_t)); |
| if (_realloc) { |
| data = _realloc; |
| totalMemUsed -= oldsize; |
| sprintf(mallocStr, "MEM: %p %5lu r-free %7lu %4lu --- %s:%u\n", memory, (unsigned long)oldsize, totalMemUsed, blockCount, file, line); |
| #if defined(_WIN32) |
| OutputDebugStringA(mallocStr); |
| #else |
| DEBUG_TRACE("%s", mallocStr); |
| #endif |
| totalMemUsed += newsize; |
| sprintf(mallocStr, "MEM: %p %5lu r-alloc %7lu %4lu --- %s:%u\n", memory, (unsigned long)newsize, totalMemUsed, blockCount, file, line); |
| #if defined(_WIN32) |
| OutputDebugStringA(mallocStr); |
| #else |
| DEBUG_TRACE("%s", mallocStr); |
| #endif |
| *(size_t*)data = newsize; |
| data = (void *)(((char*)data)+sizeof(size_t)); |
| } else { |
| #if defined(_WIN32) |
| OutputDebugStringA("MEM: realloc failed\n"); |
| #else |
| DEBUG_TRACE("%s", "MEM: realloc failed\n"); |
| #endif |
| return _realloc; |
| } |
| } else { |
| data = mg_malloc_ex(newsize, file, line); |
| } |
| } else { |
| data = 0; |
| mg_free_ex(memory, file, line); |
| } |
| |
| return data; |
| } |
| |
| #define mg_malloc(a) mg_malloc_ex(a, __FILE__, __LINE__) |
| #define mg_calloc(a,b) mg_calloc_ex(a, b, __FILE__, __LINE__) |
| #define mg_realloc(a, b) mg_realloc_ex(a, b, __FILE__, __LINE__) |
| #define mg_free(a) mg_free_ex(a, __FILE__, __LINE__) |
| |
| #else |
| static __inline void * mg_malloc(size_t a) {return malloc(a);} |
| static __inline void * mg_calloc(size_t a, size_t b) {return calloc(a, b);} |
| static __inline void * mg_realloc(void * a, size_t b) {return realloc(a, b);} |
| static __inline void mg_free(void * a) {free(a);} |
| #endif |
| |
| /* This following lines are just meant as a reminder to use the mg-functions for memory management */ |
| #ifdef malloc |
| #undef malloc |
| #endif |
| #ifdef calloc |
| #undef calloc |
| #endif |
| #ifdef realloc |
| #undef realloc |
| #endif |
| #ifdef free |
| #undef free |
| #endif |
| #define malloc DO_NOT_USE_THIS_FUNCTION__USE_mg_malloc |
| #define calloc DO_NOT_USE_THIS_FUNCTION__USE_mg_calloc |
| #define realloc DO_NOT_USE_THIS_FUNCTION__USE_mg_realloc |
| #define free DO_NOT_USE_THIS_FUNCTION__USE_mg_free |
| |
| |
| #define MD5_STATIC static |
| #include "md5.inl" |
| |
| /* Darwin prior to 7.0 and Win32 do not have socklen_t */ |
| #ifdef NO_SOCKLEN_T |
| typedef int socklen_t; |
| #endif /* NO_SOCKLEN_T */ |
| #define _DARWIN_UNLIMITED_SELECT |
| |
| #define IP_ADDR_STR_LEN 50 /* IPv6 hex string is 46 chars */ |
| |
| #if !defined(MSG_NOSIGNAL) |
| #define MSG_NOSIGNAL 0 |
| #endif |
| |
| #if !defined(SOMAXCONN) |
| #define SOMAXCONN 100 |
| #endif |
| |
| #if !defined(PATH_MAX) |
| #define PATH_MAX 4096 |
| #endif |
| |
| /* Size of the accepted socket queue */ |
| #if !defined(MGSQLEN) |
| #define MGSQLEN 20 |
| #endif |
| |
| #if defined(NO_SSL_DL) |
| #include <openssl/ssl.h> |
| #include <openssl/err.h> |
| #else |
| /* SSL loaded dynamically from DLL. |
| I put the prototypes here to be independent from OpenSSL source |
| installation. */ |
| |
| typedef struct ssl_st SSL; |
| typedef struct ssl_method_st SSL_METHOD; |
| typedef struct ssl_ctx_st SSL_CTX; |
| |
| struct ssl_func { |
| const char *name; /* SSL function name */ |
| void (*ptr)(void); /* Function pointer */ |
| }; |
| |
| #define SSL_free (* (void (*)(SSL *)) ssl_sw[0].ptr) |
| #define SSL_accept (* (int (*)(SSL *)) ssl_sw[1].ptr) |
| #define SSL_connect (* (int (*)(SSL *)) ssl_sw[2].ptr) |
| #define SSL_read (* (int (*)(SSL *, void *, int)) ssl_sw[3].ptr) |
| #define SSL_write (* (int (*)(SSL *, const void *,int)) ssl_sw[4].ptr) |
| #define SSL_get_error (* (int (*)(SSL *, int)) ssl_sw[5].ptr) |
| #define SSL_set_fd (* (int (*)(SSL *, SOCKET)) ssl_sw[6].ptr) |
| #define SSL_new (* (SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr) |
| #define SSL_CTX_new (* (SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr) |
| #define SSLv23_server_method (* (SSL_METHOD * (*)(void)) ssl_sw[9].ptr) |
| #define SSL_library_init (* (int (*)(void)) ssl_sw[10].ptr) |
| #define SSL_CTX_use_PrivateKey_file (* (int (*)(SSL_CTX *, \ |
| const char *, int)) ssl_sw[11].ptr) |
| #define SSL_CTX_use_certificate_file (* (int (*)(SSL_CTX *, \ |
| const char *, int)) ssl_sw[12].ptr) |
| #define SSL_CTX_set_default_passwd_cb \ |
| (* (void (*)(SSL_CTX *, mg_callback_t)) ssl_sw[13].ptr) |
| #define SSL_CTX_free (* (void (*)(SSL_CTX *)) ssl_sw[14].ptr) |
| #define SSL_load_error_strings (* (void (*)(void)) ssl_sw[15].ptr) |
| #define SSL_CTX_use_certificate_chain_file \ |
| (* (int (*)(SSL_CTX *, const char *)) ssl_sw[16].ptr) |
| #define SSLv23_client_method (* (SSL_METHOD * (*)(void)) ssl_sw[17].ptr) |
| #define SSL_pending (* (int (*)(SSL *)) ssl_sw[18].ptr) |
| #define SSL_CTX_set_verify (* (void (*)(SSL_CTX *, int, int)) ssl_sw[19].ptr) |
| #define SSL_shutdown (* (int (*)(SSL *)) ssl_sw[20].ptr) |
| |
| #define CRYPTO_num_locks (* (int (*)(void)) crypto_sw[0].ptr) |
| #define CRYPTO_set_locking_callback \ |
| (* (void (*)(void (*)(int, int, const char *, int))) crypto_sw[1].ptr) |
| #define CRYPTO_set_id_callback \ |
| (* (void (*)(unsigned long (*)(void))) crypto_sw[2].ptr) |
| #define ERR_get_error (* (unsigned long (*)(void)) crypto_sw[3].ptr) |
| #define ERR_error_string (* (char * (*)(unsigned long,char *)) crypto_sw[4].ptr) |
| |
| /* set_ssl_option() function updates this array. |
| It loads SSL library dynamically and changes NULLs to the actual addresses |
| of respective functions. The macros above (like SSL_connect()) are really |
| just calling these functions indirectly via the pointer. */ |
| static struct ssl_func ssl_sw[] = { |
| {"SSL_free", NULL}, |
| {"SSL_accept", NULL}, |
| {"SSL_connect", NULL}, |
| {"SSL_read", NULL}, |
| {"SSL_write", NULL}, |
| {"SSL_get_error", NULL}, |
| {"SSL_set_fd", NULL}, |
| {"SSL_new", NULL}, |
| {"SSL_CTX_new", NULL}, |
| {"SSLv23_server_method", NULL}, |
| {"SSL_library_init", NULL}, |
| {"SSL_CTX_use_PrivateKey_file", NULL}, |
| {"SSL_CTX_use_certificate_file",NULL}, |
| {"SSL_CTX_set_default_passwd_cb",NULL}, |
| {"SSL_CTX_free", NULL}, |
| {"SSL_load_error_strings", NULL}, |
| {"SSL_CTX_use_certificate_chain_file", NULL}, |
| {"SSLv23_client_method", NULL}, |
| {"SSL_pending", NULL}, |
| {"SSL_CTX_set_verify", NULL}, |
| {"SSL_shutdown", NULL}, |
| {NULL, NULL} |
| }; |
| |
| /* Similar array as ssl_sw. These functions could be located in different |
| lib. */ |
| #if !defined(NO_SSL) |
| static struct ssl_func crypto_sw[] = { |
| {"CRYPTO_num_locks", NULL}, |
| {"CRYPTO_set_locking_callback", NULL}, |
| {"CRYPTO_set_id_callback", NULL}, |
| {"ERR_get_error", NULL}, |
| {"ERR_error_string", NULL}, |
| {NULL, NULL} |
| }; |
| #endif /* NO_SSL */ |
| #endif /* NO_SSL_DL */ |
| |
| static const char *month_names[] = { |
| "Jan", "Feb", "Mar", "Apr", "May", "Jun", |
| "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" |
| }; |
| |
| /* Unified socket address. For IPv6 support, add IPv6 address structure |
| in the union u. */ |
| union usa { |
| struct sockaddr sa; |
| struct sockaddr_in sin; |
| #if defined(USE_IPV6) |
| struct sockaddr_in6 sin6; |
| #endif |
| }; |
| |
| /* Describes a string (chunk of memory). */ |
| struct vec { |
| const char *ptr; |
| size_t len; |
| }; |
| |
| struct file { |
| int is_directory; |
| time_t modification_time; |
| int64_t size; |
| FILE *fp; |
| const char *membuf; /* Non-NULL if file data is in memory */ |
| /* set to 1 if the content is gzipped |
| in which case we need a content-encoding: gzip header */ |
| int gzipped; |
| }; |
| #define STRUCT_FILE_INITIALIZER {0, 0, 0, NULL, NULL, 0} |
| |
| /* Describes listening socket, or socket which was accept()-ed by the master |
| thread and queued for future handling by the worker thread. */ |
| struct socket { |
| SOCKET sock; /* Listening socket */ |
| union usa lsa; /* Local socket address */ |
| union usa rsa; /* Remote socket address */ |
| unsigned is_ssl:1; /* Is port SSL-ed */ |
| unsigned ssl_redir:1; /* Is port supposed to redirect everything to SSL |
| port */ |
| }; |
| |
| /* NOTE(lsm): this enum shoulds be in sync with the config_options below. */ |
| enum { |
| CGI_EXTENSIONS, CGI_ENVIRONMENT, PUT_DELETE_PASSWORDS_FILE, CGI_INTERPRETER, |
| PROTECT_URI, AUTHENTICATION_DOMAIN, SSI_EXTENSIONS, THROTTLE, |
| ACCESS_LOG_FILE, ENABLE_DIRECTORY_LISTING, ERROR_LOG_FILE, |
| GLOBAL_PASSWORDS_FILE, INDEX_FILES, ENABLE_KEEP_ALIVE, ACCESS_CONTROL_LIST, |
| EXTRA_MIME_TYPES, LISTENING_PORTS, DOCUMENT_ROOT, SSL_CERTIFICATE, |
| NUM_THREADS, RUN_AS_USER, REWRITE, HIDE_FILES, REQUEST_TIMEOUT, |
| DECODE_URL, |
| |
| #if defined(USE_LUA) |
| LUA_PRELOAD_FILE, LUA_SCRIPT_EXTENSIONS, LUA_SERVER_PAGE_EXTENSIONS, |
| #endif |
| #if defined(USE_WEBSOCKET) |
| WEBSOCKET_ROOT, |
| #endif |
| #if defined(USE_LUA) && defined(USE_WEBSOCKET) |
| LUA_WEBSOCKET_EXTENSIONS, |
| #endif |
| ACCESS_CONTROL_ALLOW_ORIGIN, ERROR_PAGES, |
| |
| NUM_OPTIONS |
| }; |
| |
| /* Config option name, config types, default value */ |
| static struct mg_option config_options[] = { |
| {"cgi_pattern", CONFIG_TYPE_EXT_PATTERN, "**.cgi$|**.pl$|**.php$"}, |
| {"cgi_environment", CONFIG_TYPE_STRING, NULL}, |
| {"put_delete_auth_file", CONFIG_TYPE_FILE, NULL}, |
| {"cgi_interpreter", CONFIG_TYPE_FILE, NULL}, |
| {"protect_uri", CONFIG_TYPE_STRING, NULL}, |
| {"authentication_domain", CONFIG_TYPE_STRING, "mydomain.com"}, |
| {"ssi_pattern", CONFIG_TYPE_EXT_PATTERN, "**.shtml$|**.shtm$"}, |
| {"throttle", CONFIG_TYPE_STRING, NULL}, |
| {"access_log_file", CONFIG_TYPE_FILE, NULL}, |
| {"enable_directory_listing", CONFIG_TYPE_BOOLEAN, "yes"}, |
| {"error_log_file", CONFIG_TYPE_FILE, NULL}, |
| {"global_auth_file", CONFIG_TYPE_FILE, NULL}, |
| {"index_files", CONFIG_TYPE_STRING, |
| #ifdef USE_LUA |
| "index.xhtml,index.html,index.htm,index.lp,index.lsp,index.lua,index.cgi,index.shtml,index.php"}, |
| #else |
| "index.xhtml,index.html,index.htm,index.cgi,index.shtml,index.php"}, |
| #endif |
| {"enable_keep_alive", CONFIG_TYPE_BOOLEAN, "no"}, |
| {"access_control_list", CONFIG_TYPE_STRING, NULL}, |
| {"extra_mime_types", CONFIG_TYPE_STRING, NULL}, |
| {"listening_ports", CONFIG_TYPE_STRING, "8080"}, |
| {"document_root", CONFIG_TYPE_DIRECTORY, NULL}, |
| {"ssl_certificate", CONFIG_TYPE_FILE, NULL}, |
| {"num_threads", CONFIG_TYPE_NUMBER, "50"}, |
| {"run_as_user", CONFIG_TYPE_STRING, NULL}, |
| {"url_rewrite_patterns", CONFIG_TYPE_STRING, NULL}, |
| {"hide_files_patterns", CONFIG_TYPE_EXT_PATTERN, NULL}, |
| {"request_timeout_ms", CONFIG_TYPE_NUMBER, "30000"}, |
| {"decode_url", CONFIG_TYPE_BOOLEAN, "yes"}, |
| |
| #if defined(USE_LUA) |
| {"lua_preload_file", CONFIG_TYPE_FILE, NULL}, |
| {"lua_script_pattern", CONFIG_TYPE_EXT_PATTERN, "**.lua$"}, |
| {"lua_server_page_pattern", CONFIG_TYPE_EXT_PATTERN, "**.lp$|**.lsp$"}, |
| #endif |
| #if defined(USE_WEBSOCKET) |
| {"websocket_root", CONFIG_TYPE_DIRECTORY, NULL}, |
| #endif |
| #if defined(USE_LUA) && defined(USE_WEBSOCKET) |
| {"lua_websocket_pattern", CONFIG_TYPE_EXT_PATTERN, "**.lua$"}, |
| #endif |
| {"access_control_allow_origin", CONFIG_TYPE_STRING, "*"}, |
| {"error_pages", CONFIG_TYPE_DIRECTORY, NULL}, |
| |
| {NULL, CONFIG_TYPE_UNKNOWN, NULL} |
| }; |
| |
| struct mg_request_handler_info { |
| char *uri; |
| size_t uri_len; |
| mg_request_handler handler; |
| |
| void *cbdata; |
| struct mg_request_handler_info *next; |
| }; |
| |
| struct mg_context { |
| volatile int stop_flag; /* Should we stop event loop */ |
| SSL_CTX *ssl_ctx; /* SSL context */ |
| char *config[NUM_OPTIONS]; /* Civetweb configuration parameters */ |
| struct mg_callbacks callbacks; /* User-defined callback function */ |
| void *user_data; /* User-defined data */ |
| int context_type; /* 1 = server context, 2 = client context */ |
| |
| struct socket *listening_sockets; |
| in_port_t *listening_ports; |
| int num_listening_sockets; |
| |
| volatile int num_threads; /* Number of threads */ |
| pthread_mutex_t thread_mutex; /* Protects (max|num)_threads */ |
| pthread_cond_t thread_cond; /* Condvar for tracking workers terminations */ |
| |
| struct socket queue[MGSQLEN]; /* Accepted sockets */ |
| volatile int sq_head; /* Head of the socket queue */ |
| volatile int sq_tail; /* Tail of the socket queue */ |
| pthread_cond_t sq_full; /* Signaled when socket is produced */ |
| pthread_cond_t sq_empty; /* Signaled when socket is consumed */ |
| pthread_t masterthreadid; /* The master thread ID */ |
| int workerthreadcount; /* The amount of worker threads. */ |
| pthread_t *workerthreadids; /* The worker thread IDs */ |
| |
| unsigned long start_time; /* Server start time, used for authentication */ |
| pthread_mutex_t nonce_mutex; /* Protects nonce_count */ |
| unsigned long nonce_count; /* Used nonces, used for authentication */ |
| |
| char *systemName; /* What operating system is running */ |
| |
| /* linked list of uri handlers */ |
| struct mg_request_handler_info *request_handlers; |
| |
| #if defined(USE_LUA) && defined(USE_WEBSOCKET) |
| /* linked list of shared lua websockets */ |
| struct mg_shared_lua_websocket_list *shared_lua_websockets; |
| #endif |
| |
| #ifdef USE_TIMERS |
| struct ttimers * timers; |
| #endif |
| }; |
| |
| struct mg_connection { |
| struct mg_request_info request_info; |
| struct mg_context *ctx; |
| SSL *ssl; /* SSL descriptor */ |
| SSL_CTX *client_ssl_ctx; /* SSL context for client connections */ |
| struct socket client; /* Connected client */ |
| time_t birth_time; /* Time when request was received */ |
| int64_t num_bytes_sent; /* Total bytes sent to client */ |
| int64_t content_len; /* Content-Length header value */ |
| int64_t consumed_content; /* How many bytes of content have been read */ |
| char *buf; /* Buffer for received data */ |
| char *path_info; /* PATH_INFO part of the URL */ |
| int must_close; /* 1 if connection must be closed */ |
| int in_error_handler; /* 1 if in handler for user defined error pages */ |
| int buf_size; /* Buffer size */ |
| int request_len; /* Size of the request + headers in a buffer */ |
| int data_len; /* Total size of data in a buffer */ |
| int status_code; /* HTTP reply status code, e.g. 200 */ |
| int throttle; /* Throttling, bytes/sec. <= 0 means no throttle */ |
| time_t last_throttle_time; /* Last time throttled data was sent */ |
| int64_t last_throttle_bytes; /* Bytes sent this second */ |
| pthread_mutex_t mutex; /* Used by mg_lock_connection/mg_unlock_connection to ensure atomic transmissions for websockets */ |
| #if defined(USE_LUA) && defined(USE_WEBSOCKET) |
| void * lua_websocket_state; /* Lua_State for a websocket connection */ |
| #endif |
| }; |
| |
| static pthread_key_t sTlsKey; /* Thread local storage index */ |
| static int sTlsInit = 0; |
| |
| struct mg_workerTLS { |
| int is_master; |
| #if defined(_WIN32) && !defined(__SYMBIAN32__) |
| HANDLE pthread_cond_helper_mutex; |
| #endif |
| }; |
| |
| /* Directory entry */ |
| struct de { |
| struct mg_connection *conn; |
| char *file_name; |
| struct file file; |
| }; |
| |
| #if defined(USE_WEBSOCKET) |
| static int is_websocket_protocol(const struct mg_connection *conn); |
| #else |
| #define is_websocket_protocol(conn) (0) |
| #endif |
| |
| int mg_atomic_inc(volatile int * addr) |
| { |
| int ret; |
| #if defined(_WIN32) && !defined(__SYMBIAN32__) |
| ret = InterlockedIncrement((volatile unsigned int *) addr); |
| #elif defined(__GNUC__) |
| ret = __sync_add_and_fetch(addr, 1); |
| #else |
| ret = (++(*addr)); |
| #endif |
| return ret; |
| } |
| |
| int mg_atomic_dec(volatile int * addr) |
| { |
| int ret; |
| #if defined(_WIN32) && !defined(__SYMBIAN32__) |
| ret = InterlockedDecrement((volatile unsigned int *) addr); |
| #elif defined(__GNUC__) |
| ret = __sync_sub_and_fetch(addr, 1); |
| #else |
| ret = (--(*addr)); |
| #endif |
| return ret; |
| } |
| |
| #if !defined(NO_THREAD_NAME) |
| #if defined(_WIN32) && defined(_MSC_VER) |
| /* Set the thread name for debugging purposes in Visual Studio |
| http://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx |
| */ |
| #pragma pack(push,8) |
| typedef struct tagTHREADNAME_INFO |
| { |
| DWORD dwType; /* Must be 0x1000. */ |
| LPCSTR szName; /* Pointer to name (in user addr space). */ |
| DWORD dwThreadID; /* Thread ID (-1=caller thread). */ |
| DWORD dwFlags; /* Reserved for future use, must be zero. */ |
| } THREADNAME_INFO; |
| #pragma pack(pop) |
| #elif defined(__linux__) |
| #include <sys/prctl.h> |
| #endif |
| |
| void mg_set_thread_name(const char* name) |
| { |
| char threadName[16]; /* Max. thread length in Linux/OSX/.. */ |
| |
| if (snprintf(threadName, sizeof(threadName), "civetweb-%s", name)<0) return; |
| threadName[sizeof(threadName)-1] = 0; |
| |
| #if defined(_WIN32) |
| #if defined(_MSC_VER) |
| /* Windows and Visual Studio Compiler */ |
| __try |
| { |
| THREADNAME_INFO info; |
| info.dwType = 0x1000; |
| info.szName = threadName; |
| info.dwThreadID = -1; |
| info.dwFlags = 0; |
| |
| RaiseException(0x406D1388, 0, sizeof(info)/sizeof(ULONG_PTR), (ULONG_PTR*)&info); |
| } |
| __except(EXCEPTION_EXECUTE_HANDLER) |
| { |
| } |
| #elif defined(__MINGW32__) |
| /* No option known to set thread name for MinGW */ |
| #endif |
| #elif defined(__linux__) |
| /* Linux */ |
| (void)prctl(PR_SET_NAME,threadName,0,0,0); |
| #elif defined(__APPLE__) || defined(__MACH__) |
| /* OS X (TODO: test) */ |
| (void)pthread_setname_np(threadName); |
| #elif defined(BSD) || defined(__FreeBSD__) || defined(__OpenBSD__) |
| /* BSD (TODO: test) */ |
| pthread_set_name_np(pthread_self(), threadName); |
| #else |
| /* POSIX */ |
| (void)pthread_setname_np(pthread_self(), threadName); |
| #endif |
| } |
| #else /* !defined(NO_THREAD_NAME) */ |
| void mg_set_thread_name(const char* threadName) {} |
| #endif |
| |
| #if defined(MG_LEGACY_INTERFACE) |
| const char **mg_get_valid_option_names(void) |
| { |
| static const char * data[2 * sizeof(config_options) / sizeof(config_options[0])] = {0}; |
| int i; |
| |
| for (i=0; config_options[i].name != NULL; i++) { |
| data[i * 2] = config_options[i].name; |
| data[i * 2 + 1] = config_options[i].default_value; |
| } |
| |
| return data; |
| } |
| #endif |
| |
| const struct mg_option *mg_get_valid_options(void) |
| { |
| return config_options; |
| } |
| |
| |
| static int is_file_in_memory(struct mg_connection *conn, const char *path, |
| struct file *filep) |
| { |
| size_t size = 0; |
| if ((filep->membuf = conn->ctx->callbacks.open_file == NULL ? NULL : |
| conn->ctx->callbacks.open_file(conn, path, &size)) != NULL) { |
| /* NOTE: override filep->size only on success. Otherwise, it might |
| break constructs like if (!mg_stat() || !mg_fopen()) ... */ |
| filep->size = size; |
| } |
| return filep->membuf != NULL; |
| } |
| |
| static int is_file_opened(const struct file *filep) |
| { |
| return filep->membuf != NULL || filep->fp != NULL; |
| } |
| |
| static int mg_fopen(struct mg_connection *conn, const char *path, |
| const char *mode, struct file *filep) |
| { |
| if (!is_file_in_memory(conn, path, filep)) { |
| #ifdef _WIN32 |
| wchar_t wbuf[PATH_MAX], wmode[20]; |
| to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
| MultiByteToWideChar(CP_UTF8, 0, mode, -1, wmode, ARRAY_SIZE(wmode)); |
| filep->fp = _wfopen(wbuf, wmode); |
| #else |
| filep->fp = fopen(path, mode); |
| #endif |
| } |
| |
| return is_file_opened(filep); |
| } |
| |
| static void mg_fclose(struct file *filep) |
| { |
| if (filep != NULL && filep->fp != NULL) { |
| fclose(filep->fp); |
| } |
| } |
| |
| static void mg_strlcpy(register char *dst, register const char *src, size_t n) |
| { |
| for (; *src != '\0' && n > 1; n--) { |
| *dst++ = *src++; |
| } |
| *dst = '\0'; |
| } |
| |
| static int lowercase(const char *s) |
| { |
| return tolower(* (const unsigned char *) s); |
| } |
| |
| int mg_strncasecmp(const char *s1, const char *s2, size_t len) |
| { |
| int diff = 0; |
| |
| if (len > 0) |
| do { |
| diff = lowercase(s1++) - lowercase(s2++); |
| } while (diff == 0 && s1[-1] != '\0' && --len > 0); |
| |
| return diff; |
| } |
| |
| static int mg_strcasecmp(const char *s1, const char *s2) |
| { |
| int diff; |
| |
| do { |
| diff = lowercase(s1++) - lowercase(s2++); |
| } while (diff == 0 && s1[-1] != '\0'); |
| |
| return diff; |
| } |
| |
| static char * mg_strndup(const char *ptr, size_t len) |
| { |
| char *p; |
| |
| if ((p = (char *) mg_malloc(len + 1)) != NULL) { |
| mg_strlcpy(p, ptr, len + 1); |
| } |
| |
| return p; |
| } |
| |
| static char * mg_strdup(const char *str) |
| { |
| return mg_strndup(str, strlen(str)); |
| } |
| |
| static const char *mg_strcasestr(const char *big_str, const char *small_str) |
| { |
| int i, big_len = (int)strlen(big_str), small_len = (int)strlen(small_str); |
| |
| for (i = 0; i <= big_len - small_len; i++) { |
| if (mg_strncasecmp(big_str + i, small_str, small_len) == 0) { |
| return big_str + i; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| /* Like snprintf(), but never returns negative value, or a value |
| that is larger than a supplied buffer. |
| Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability |
| in his audit report. */ |
| static int mg_vsnprintf(struct mg_connection *conn, char *buf, size_t buflen, |
| const char *fmt, va_list ap) |
| { |
| int n; |
| |
| if (buflen == 0) |
| return 0; |
| |
| n = vsnprintf(buf, buflen, fmt, ap); |
| |
| if (n < 0) { |
| mg_cry(conn, "vsnprintf error"); |
| n = 0; |
| } else if (n >= (int) buflen) { |
| mg_cry(conn, "truncating vsnprintf buffer: [%.*s]", |
| n > 200 ? 200 : n, buf); |
| n = (int) buflen - 1; |
| } |
| buf[n] = '\0'; |
| |
| return n; |
| } |
| |
| static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen, |
| PRINTF_FORMAT_STRING(const char *fmt), ...) |
| PRINTF_ARGS(4, 5); |
| |
| static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen, |
| const char *fmt, ...) |
| { |
| va_list ap; |
| int n; |
| |
| va_start(ap, fmt); |
| n = mg_vsnprintf(conn, buf, buflen, fmt, ap); |
| va_end(ap); |
| |
| return n; |
| } |
| |
| static int get_option_index(const char *name) |
| { |
| int i; |
| |
| for (i = 0; config_options[i].name != NULL; i++) { |
| if (strcmp(config_options[i].name, name) == 0) { |
| return i; |
| } |
| } |
| return -1; |
| } |
| |
| const char *mg_get_option(const struct mg_context *ctx, const char *name) |
| { |
| int i; |
| if ((i = get_option_index(name)) == -1) { |
| return NULL; |
| } else if (ctx->config[i] == NULL) { |
| return ""; |
| } else { |
| return ctx->config[i]; |
| } |
| } |
| |
| struct mg_context *mg_get_context(struct mg_connection * conn) |
| { |
| return (conn == NULL) ? (struct mg_context *)NULL : (conn->ctx); |
| } |
| |
| void *mg_get_user_data(struct mg_context *ctx) |
| { |
| return (ctx == NULL) ? NULL : ctx->user_data; |
| } |
| |
| size_t mg_get_ports(const struct mg_context *ctx, size_t size, int* ports, int* ssl) |
| { |
| size_t i; |
| for (i = 0; i < size && i < (size_t)ctx->num_listening_sockets; i++) |
| { |
| ssl[i] = ctx->listening_sockets[i].is_ssl; |
| ports[i] = ctx->listening_ports[i]; |
| } |
| return i; |
| } |
| |
| static void sockaddr_to_string(char *buf, size_t len, |
| const union usa *usa) |
| { |
| buf[0] = '\0'; |
| #if defined(USE_IPV6) |
| inet_ntop(usa->sa.sa_family, usa->sa.sa_family == AF_INET ? |
| (void *) &usa->sin.sin_addr : |
| (void *) &usa->sin6.sin6_addr, buf, len); |
| #elif defined(_WIN32) |
| /* Only Windows Vista (and newer) have inet_ntop() */ |
| mg_strlcpy(buf, inet_ntoa(usa->sin.sin_addr), len); |
| #else |
| inet_ntop(usa->sa.sa_family, (void *) &usa->sin.sin_addr, buf, len); |
| #endif |
| } |
| |
| /* Convert time_t to a string. According to RFC2616, Sec 14.18, this must be included in all responses other than 100, 101, 5xx. */ |
| static void gmt_time_string(char *buf, size_t buf_len, time_t *t) |
| { |
| struct tm *tm; |
| |
| tm = gmtime(t); |
| if (tm != NULL) { |
| strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", tm); |
| } else { |
| mg_strlcpy(buf, "Thu, 01 Jan 1970 00:00:00 GMT", buf_len); |
| buf[buf_len - 1] = '\0'; |
| } |
| } |
| |
| /* Print error message to the opened error log stream. */ |
| void mg_cry(struct mg_connection *conn, const char *fmt, ...) |
| { |
| char buf[MG_BUF_LEN], src_addr[IP_ADDR_STR_LEN]; |
| va_list ap; |
| FILE *fp; |
| time_t timestamp; |
| |
| va_start(ap, fmt); |
| IGNORE_UNUSED_RESULT(vsnprintf(buf, sizeof(buf), fmt, ap)); |
| va_end(ap); |
| |
| /* Do not lock when getting the callback value, here and below. |
| I suppose this is fine, since function cannot disappear in the |
| same way string option can. */ |
| if (conn->ctx->callbacks.log_message == NULL || |
| conn->ctx->callbacks.log_message(conn, buf) == 0) { |
| fp = conn->ctx->config[ERROR_LOG_FILE] == NULL ? NULL : |
| fopen(conn->ctx->config[ERROR_LOG_FILE], "a+"); |
| |
| if (fp != NULL) { |
| flockfile(fp); |
| timestamp = time(NULL); |
| |
| sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa); |
| fprintf(fp, "[%010lu] [error] [client %s] ", (unsigned long) timestamp, |
| src_addr); |
| |
| if (conn->request_info.request_method != NULL) { |
| fprintf(fp, "%s %s: ", conn->request_info.request_method, |
| conn->request_info.uri); |
| } |
| |
| fprintf(fp, "%s", buf); |
| fputc('\n', fp); |
| funlockfile(fp); |
| fclose(fp); |
| } |
| } |
| } |
| |
| /* Return fake connection structure. Used for logging, if connection |
| is not applicable at the moment of logging. */ |
| static struct mg_connection *fc(struct mg_context *ctx) |
| { |
| static struct mg_connection fake_connection; |
| fake_connection.ctx = ctx; |
| return &fake_connection; |
| } |
| |
| const char *mg_version(void) |
| { |
| return CIVETWEB_VERSION; |
| } |
| |
| struct mg_request_info *mg_get_request_info(struct mg_connection *conn) |
| { |
| return &conn->request_info; |
| } |
| |
| /* Skip the characters until one of the delimiters characters found. |
| 0-terminate resulting word. Skip the delimiter and following whitespaces. |
| Advance pointer to buffer to the next word. Return found 0-terminated word. |
| Delimiters can be quoted with quotechar. */ |
| static char *skip_quoted(char **buf, const char *delimiters, |
| const char *whitespace, char quotechar) |
| { |
| char *p, *begin_word, *end_word, *end_whitespace; |
| |
| begin_word = *buf; |
| end_word = begin_word + strcspn(begin_word, delimiters); |
| |
| /* Check for quotechar */ |
| if (end_word > begin_word) { |
| p = end_word - 1; |
| while (*p == quotechar) { |
| /* TODO (bel): it seems this code is never reached, so quotechar is actually |
| not needed - check if this code may be droped */ |
| |
| /* If there is anything beyond end_word, copy it */ |
| if (*end_word == '\0') { |
| *p = '\0'; |
| break; |
| } else { |
| size_t end_off = strcspn(end_word + 1, delimiters); |
| memmove (p, end_word, end_off + 1); |
| p += end_off; /* p must correspond to end_word - 1 */ |
| end_word += end_off + 1; |
| } |
| } |
| for (p++; p < end_word; p++) { |
| *p = '\0'; |
| } |
| } |
| |
| if (*end_word == '\0') { |
| *buf = end_word; |
| } else { |
| end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace); |
| |
| for (p = end_word; p < end_whitespace; p++) { |
| *p = '\0'; |
| } |
| |
| *buf = end_whitespace; |
| } |
| |
| return begin_word; |
| } |
| |
| /* Simplified version of skip_quoted without quote char |
| and whitespace == delimiters */ |
| static char *skip(char **buf, const char *delimiters) |
| { |
| return skip_quoted(buf, delimiters, delimiters, 0); |
| } |
| |
| |
| /* Return HTTP header value, or NULL if not found. */ |
| static const char *get_header(const struct mg_request_info *ri, |
| const char *name) |
| { |
| int i; |
| |
| for (i = 0; i < ri->num_headers; i++) |
| if (!mg_strcasecmp(name, ri->http_headers[i].name)) |
| return ri->http_headers[i].value; |
| |
| return NULL; |
| } |
| |
| const char *mg_get_header(const struct mg_connection *conn, const char *name) |
| { |
| return get_header(&conn->request_info, name); |
| } |
| |
| /* A helper function for traversing a comma separated list of values. |
| It returns a list pointer shifted to the next value, or NULL if the end |
| of the list found. |
| Value is stored in val vector. If value has form "x=y", then eq_val |
| vector is initialized to point to the "y" part, and val vector length |
| is adjusted to point only to "x". */ |
| static const char *next_option(const char *list, struct vec *val, |
| struct vec *eq_val) |
| { |
| if (list == NULL || *list == '\0') { |
| /* End of the list */ |
| list = NULL; |
| } else { |
| val->ptr = list; |
| if ((list = strchr(val->ptr, ',')) != NULL) { |
| /* Comma found. Store length and shift the list ptr */ |
| val->len = list - val->ptr; |
| list++; |
| } else { |
| /* This value is the last one */ |
| list = val->ptr + strlen(val->ptr); |
| val->len = list - val->ptr; |
| } |
| |
| if (eq_val != NULL) { |
| /* Value has form "x=y", adjust pointers and lengths |
| so that val points to "x", and eq_val points to "y". */ |
| eq_val->len = 0; |
| eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len); |
| if (eq_val->ptr != NULL) { |
| eq_val->ptr++; /* Skip over '=' character */ |
| eq_val->len = val->ptr + val->len - eq_val->ptr; |
| val->len = (eq_val->ptr - val->ptr) - 1; |
| } |
| } |
| } |
| |
| return list; |
| } |
| |
| /* Perform case-insensitive match of string against pattern */ |
| static int match_prefix(const char *pattern, int pattern_len, const char *str) |
| { |
| const char *or_str; |
| int i, j, len, res; |
| |
| if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) { |
| res = match_prefix(pattern, (int)(or_str - pattern), str); |
| return res > 0 ? res : |
| match_prefix(or_str + 1, (int)((pattern + pattern_len) - (or_str + 1)), str); |
| } |
| |
| i = j = 0; |
| for (; i < pattern_len; i++, j++) { |
| if (pattern[i] == '?' && str[j] != '\0') { |
| continue; |
| } else if (pattern[i] == '$') { |
| return str[j] == '\0' ? j : -1; |
| } else if (pattern[i] == '*') { |
| i++; |
| if (pattern[i] == '*') { |
| i++; |
| len = (int) strlen(str + j); |
| } else { |
| len = (int) strcspn(str + j, "/"); |
| } |
| if (i == pattern_len) { |
| return j + len; |
| } |
| do { |
| res = match_prefix(pattern + i, pattern_len - i, str + j + len); |
| } while (res == -1 && len-- > 0); |
| return res == -1 ? -1 : j + res + len; |
| } else if (lowercase(&pattern[i]) != lowercase(&str[j])) { |
| return -1; |
| } |
| } |
| return j; |
| } |
| |
| /* HTTP 1.1 assumes keep alive if "Connection:" header is not set |
| This function must tolerate situations when connection info is not |
| set up, for example if request parsing failed. */ |
| static int should_keep_alive(const struct mg_connection *conn) |
| { |
| const char *http_version = conn->request_info.http_version; |
| const char *header = mg_get_header(conn, "Connection"); |
| if (conn->must_close || |
| conn->status_code == 401 || |
| mg_strcasecmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes") != 0 || |
| (header != NULL && mg_strcasecmp(header, "keep-alive") != 0) || |
| (header == NULL && http_version && 0!=strcmp(http_version, "1.1"))) { |
| return 0; |
| } |
| return 1; |
| } |
| |
| static int should_decode_url(const struct mg_connection *conn) |
| { |
| return (mg_strcasecmp(conn->ctx->config[DECODE_URL], "yes") == 0); |
| } |
| |
| static const char *suggest_connection_header(const struct mg_connection *conn) |
| { |
| return should_keep_alive(conn) ? "keep-alive" : "close"; |
| } |
| |
| static void handle_file_based_request(struct mg_connection *conn, const char *path, struct file *filep); |
| static int mg_stat(struct mg_connection *conn, const char *path, struct file *filep); |
| |
| static const char *mg_get_response_code_text(int response_code, struct mg_connection *conn) |
| { |
| switch (response_code) |
| { |
| /* RFC2616 Section 10.1 - Informational 1xx */ |
| case 100: return "Continue"; /* RFC2616 Section 10.1.1 */ |
| case 101: return "Switching Protocols"; /* RFC2616 Section 10.1.2 */ |
| case 102: return "Processing"; /* RFC2518 Section 10.1 */ |
| |
| /* RFC2616 Section 10.2 - Successful 2xx */ |
| case 200: return "OK"; /* RFC2616 Section 10.2.1 */ |
| case 201: return "Created"; /* RFC2616 Section 10.2.2 */ |
| case 202: return "Accepted"; /* RFC2616 Section 10.2.3 */ |
| case 203: return "Non-Authoritative Information"; /* RFC2616 Section 10.2.4 */ |
| case 204: return "No Content"; /* RFC2616 Section 10.2.5 */ |
| case 205: return "Reset Content"; /* RFC2616 Section 10.2.6 */ |
| case 206: return "Partial Content"; /* RFC2616 Section 10.2.7 */ |
| case 207: return "Multi-Status"; /* RFC2518 Section 10.2, RFC4918 Section 11.1 */ |
| |
| /* RFC2616 Section 10.3 - Redirection 3xx */ |
| case 300: return "Multiple Choices"; /* RFC2616 Section 10.3.1 */ |
| case 301: return "Moved Permanently"; /* RFC2616 Section 10.3.2 */ |
| case 302: return "Found"; /* RFC2616 Section 10.3.3 */ |
| case 303: return "See Other"; /* RFC2616 Section 10.3.4 */ |
| case 304: return "Not Modified"; /* RFC2616 Section 10.3.5 */ |
| case 305: return "Use Proxy"; /* RFC2616 Section 10.3.6 */ |
| case 307: return "Temporary Redirect"; /* RFC2616 Section 10.3.8 */ |
| |
| /* RFC2616 Section 10.4 - Client Error 4xx */ |
| case 400: return "Bad Request"; /* RFC2616 Section 10.4.1 */ |
| case 401: return "Unauthorized"; /* RFC2616 Section 10.4.2 */ |
| case 402: return "Payment Required"; /* RFC2616 Section 10.4.3 */ |
| case 403: return "Forbidden"; /* RFC2616 Section 10.4.4 */ |
| case 404: return "Not Found"; /* RFC2616 Section 10.4.5 */ |
| case 405: return "Method Not Allowed"; /* RFC2616 Section 10.4.6 */ |
| case 406: return "Not Acceptable"; /* RFC2616 Section 10.4.7 */ |
| case 407: return "Proxy Authentication Required"; /* RFC2616 Section 10.4.8 */ |
| case 408: return "Request Time-out"; /* RFC2616 Section 10.4.9 */ |
| case 409: return "Conflict"; /* RFC2616 Section 10.4.10 */ |
| case 410: return "Gone"; /* RFC2616 Section 10.4.11 */ |
| case 411: return "Length Required"; /* RFC2616 Section 10.4.12 */ |
| case 412: return "Precondition Failed"; /* RFC2616 Section 10.4.13 */ |
| case 413: return "Request Entity Too Large"; /* RFC2616 Section 10.4.14 */ |
| case 414: return "Request-URI Too Large"; /* RFC2616 Section 10.4.15 */ |
| case 415: return "Unsupported Media Type"; /* RFC2616 Section 10.4.16 */ |
| case 416: return "Requested range not satisfiable"; /* RFC2616 Section 10.4.17 */ |
| case 417: return "Expectation Failed"; /* RFC2616 Section 10.4.18 */ |
| case 422: return "Unproccessable entity"; /* RFC2518 Section 10.3, RFC4918 Section 11.2 */ |
| case 423: return "Locked"; /* RFC2518 Section 10.4, RFC4918 Section 11.3 */ |
| case 424: return "Failed Dependency"; /* RFC2518 Section 10.5, RFC4918 Section 11.4 */ |
| case 428: return "Precondition Required"; /* RFC 6585, Section 3 */ |
| case 429: return "Too Many Requests"; /* RFC 6585, Section 4 */ |
| case 431: return "Request Header Fields Too Large"; /* RFC 6585, Section 5 */ |
| |
| /* RFC2616 Section 10.5 - Server Error 5xx */ |
| case 500: return "Internal Server Error"; /* RFC2616 Section 10.5.1 */ |
| case 501: return "Not Implemented"; /* RFC2616 Section 10.5.2 */ |
| case 502: return "Bad Gateway"; /* RFC2616 Section 10.5.3 */ |
| case 503: return "Service Unavailable"; /* RFC2616 Section 10.5.4 */ |
| case 504: return "Gateway Time-out"; /* RFC2616 Section 10.5.5 */ |
| case 505: return "HTTP Version not supported"; /* RFC2616 Section 10.5.6 */ |
| case 507: return "Insufficient Storage"; /* RFC2518 Section 10.6, , RFC4918 Section 11.5 */ |
| case 511: return "Network Authentication Required"; /* RFC 6585, Section 6 */ |
| |
| /* Other RFCs */ |
| case 426: return "Upgrade Required"; /* RFC 2817 */ |
| |
| /* Return codes from non normative RFCs: */ |
| /* Informative and experimental RFCs, "de facto" standards due to common use, ... */ |
| case 208: return "Already Reported"; /* RFC5842 Section 7.1 */ |
| case 226: return "IM used"; /* RFC3229 Section 10.4.1 */ |
| case 308: return "Permanent Redirect"; /* RFC7238 Section 3 */ |
| case 418: return "I am a teapot"; /* RFC2324 Section 2.3.2 */ |
| case 419: return "Authentication Timeout"; /* common use */ |
| case 451: return "Unavailable For Legal Reasons"; /* draft-tbray-http-legally-restricted-status-05, Section 3 */ |
| case 506: return "Variant Also Negotiates"; /* RFC 2295, Section 8.1 */ |
| case 508: return "Loop Detected"; /* RFC5842 Section 7.1 */ |
| case 510: return "Not Extended"; /* RFC 2774, Section 7 */ |
| |
| default: |
| /* This error code is unknown. This should not happen. */ |
| if (conn) { |
| mg_cry(conn, "Unknown HTTP response code: %u", response_code); |
| } |
| |
| /* Return at least a category according to RFC 2616 Section 10. */ |
| if (response_code>=100 && response_code<200) { |
| /* Unknown informational status code */ |
| return "Information"; |
| } |
| if (response_code>=200 && response_code<300) { |
| /* Unknown success code */ |
| return "Success"; |
| } |
| if (response_code>=300 && response_code<400) { |
| /* Unknown redirection code */ |
| return "Redirection"; |
| } |
| if (response_code>=400 && response_code<500) { |
| /* Unknown request error code */ |
| return "Client Error"; |
| } |
| if (response_code>=500 && response_code<600) { |
| /* Unknown server error code */ |
| return "Server Error"; |
| } |
| |
| /* Response code not even within reasonable range */ |
| return ""; |
| } |
| } |
| |
| |
| static void send_http_error(struct mg_connection *, int, const char *, |
| PRINTF_FORMAT_STRING(const char *fmt), ...) |
| PRINTF_ARGS(4, 5); |
| |
| |
| static void send_http_error(struct mg_connection *conn, int status, |
| const char *reason, const char *fmt, ...) |
| { |
| char buf[MG_BUF_LEN]; |
| va_list ap; |
| int len = 0, i, page_handler_found, scope; |
| char date[64]; |
| time_t curtime = time(NULL); |
| const char *error_handler = NULL; |
| struct file error_page_file = STRUCT_FILE_INITIALIZER; |
| const char *error_page_file_ext, *tstr; |
| |
| if (!reason) { |
| reason = mg_get_response_code_text(status, conn); |
| } |
| |
| conn->status_code = status; |
| if (conn->in_error_handler || |
| conn->ctx->callbacks.http_error == NULL || |
| conn->ctx->callbacks.http_error(conn, status)) { |
| |
| if (!conn->in_error_handler) { |
| /* Send user defined error pages, if defined */ |
| error_handler = conn->ctx->config[ERROR_PAGES]; |
| error_page_file_ext = conn->ctx->config[INDEX_FILES]; |
| page_handler_found = 0; |
| if (error_handler != NULL) { |
| for (scope=1; (scope<=3) && !page_handler_found; scope++) { |
| switch (scope) { |
| case 1: |
| len = mg_snprintf(conn, buf, sizeof(buf)-32, "%serror%03u.", error_handler, status); |
| break; |
| case 2: |
| len = mg_snprintf(conn, buf, sizeof(buf)-32, "%serror%01uxx.", error_handler, status/100); |
| break; |
| default: |
| len = mg_snprintf(conn, buf, sizeof(buf)-32, "%serror.", error_handler); |
| break; |
| } |
| tstr = strchr(error_page_file_ext, '.'); |
| while (tstr) { |
| for (i=1; i<32 && tstr[i]!=0 && tstr[i]!=','; i++) buf[len+i-1]=tstr[i]; |
| buf[len+i-1]=0; |
| if (mg_stat(conn, buf, &error_page_file)) { |
| page_handler_found = 1; |
| break; |
| } |
| tstr = strchr(tstr+i, '.'); |
| } |
| } |
| } |
| |
| if (page_handler_found) { |
| conn->in_error_handler = 1; |
| handle_file_based_request(conn, buf, &error_page_file); |
| conn->in_error_handler = 0; |
| return; |
| } |
| } |
| |
| buf[0] = '\0'; |
| gmt_time_string(date, sizeof(date), &curtime); |
| |
| /* Errors 1xx, 204 and 304 MUST NOT send a body */ |
| if (status > 199 && status != 204 && status != 304) { |
| len = mg_snprintf(conn, buf, sizeof(buf)-1, "Error %d: %s", status, reason); |
| buf[len] = '\n'; |
| len++; |
| buf[len] = 0; |
| |
| va_start(ap, fmt); |
| len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, fmt, ap); |
| va_end(ap); |
| } |
| DEBUG_TRACE("[%s]", buf); |
| |
| mg_printf(conn, "HTTP/1.1 %d %s\r\n" |
| "Content-Length: %d\r\n" |
| "Date: %s\r\n" |
| "Connection: %s\r\n\r\n", |
| status, reason, len, date, |
| suggest_connection_header(conn)); |
| conn->num_bytes_sent += mg_printf(conn, "%s", buf); |
| } |
| } |
| |
| #if defined(_WIN32) && !defined(__SYMBIAN32__) |
| static int pthread_mutex_init(pthread_mutex_t *mutex, void *unused) |
| { |
| (void) unused; |
| *mutex = CreateMutex(NULL, FALSE, NULL); |
| return *mutex == NULL ? -1 : 0; |
| } |
| |
| static int pthread_mutex_destroy(pthread_mutex_t *mutex) |
| { |
| return CloseHandle(*mutex) == 0 ? -1 : 0; |
| } |
| |
| static int pthread_mutex_lock(pthread_mutex_t *mutex) |
| { |
| return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0 ? 0 : -1; |
| } |
| |
| static int pthread_mutex_trylock(pthread_mutex_t *mutex) |
| { |
| switch (WaitForSingleObject(*mutex, 0)) { |
| case WAIT_OBJECT_0: |
| return 0; |
| case WAIT_TIMEOUT: |
| return -2; /* EBUSY */ |
| } |
| return -1; |
| } |
| |
| static int pthread_mutex_unlock(pthread_mutex_t *mutex) |
| { |
| return ReleaseMutex(*mutex) == 0 ? -1 : 0; |
| } |
| |
| #ifndef WIN_PTHREADS_TIME_H |
| static int clock_gettime(clockid_t clk_id, struct timespec *tp) |
| { |
| FILETIME ft; |
| ULARGE_INTEGER li; |
| BOOL ok = FALSE; |
| double d; |
| static double perfcnt_per_sec = 0.0; |
| |
| if (tp) { |
| if (clk_id == CLOCK_REALTIME) { |
| GetSystemTimeAsFileTime(&ft); |
| li.LowPart = ft.dwLowDateTime; |
| li.HighPart = ft.dwHighDateTime; |
| li.QuadPart -= 116444736000000000; /* 1.1.1970 in filedate */ |
| tp->tv_sec = (time_t)(li.QuadPart / 10000000); |
| tp->tv_nsec = (long)(li.QuadPart % 10000000) * 100; |
| ok = TRUE; |
| } else if (clk_id == CLOCK_MONOTONIC) { |
| if (perfcnt_per_sec == 0.0) { |
| QueryPerformanceFrequency((LARGE_INTEGER *) &li); |
| perfcnt_per_sec = 1.0 / li.QuadPart; |
| } |
| if (perfcnt_per_sec != 0.0) { |
| QueryPerformanceCounter((LARGE_INTEGER *) &li); |
| d = li.QuadPart * perfcnt_per_sec; |
| tp->tv_sec = (time_t)d; |
| d -= tp->tv_sec; |
| tp->tv_nsec = (long)(d*1.0E9); |
| ok = TRUE; |
| } |
| } |
| } |
| |
| return ok ? 0 : -1; |
| } |
| #endif |
| |
| static int pthread_cond_init(pthread_cond_t *cv, const void *unused) |
| { |
| (void) unused; |
| InitializeCriticalSection(&cv->threadIdSec); |
| cv->waitingthreadcount = 0; |
| cv->waitingthreadhdls = (pthread_t *) mg_calloc(MAX_WORKER_THREADS, sizeof(pthread_t)); |
| return (cv->waitingthreadhdls!=NULL) ? 0 : -1; |
| } |
| |
| static int pthread_cond_timedwait(pthread_cond_t *cv, pthread_mutex_t *mutex, const struct timespec * abstime) |
| { |
| struct mg_workerTLS * tls = (struct mg_workerTLS *)TlsGetValue(sTlsKey); |
| int ok; |
| struct timespec tsnow; |
| int64_t nsnow, nswaitabs, nswaitrel; |
| DWORD mswaitrel; |
| |
| EnterCriticalSection(&cv->threadIdSec); |
| assert(cv->waitingthreadcount < MAX_WORKER_THREADS); |
| cv->waitingthreadhdls[cv->waitingthreadcount] = tls->pthread_cond_helper_mutex; |
| cv->waitingthreadcount++; |
| LeaveCriticalSection(&cv->threadIdSec); |
| |
| if (abstime) { |
| clock_gettime(CLOCK_REALTIME, &tsnow); |
| nsnow = (((uint64_t)tsnow.tv_sec)*1000000000) + tsnow.tv_nsec; |
| nswaitabs = (((uint64_t)abstime->tv_sec)*1000000000) + abstime->tv_nsec; |
| nswaitrel = nswaitabs - nsnow; |
| if (nswaitrel<0) nswaitrel=0; |
| mswaitrel = (DWORD)(nswaitrel / 1000000); |
| } else { |
| mswaitrel = INFINITE; |
| } |
| |
| pthread_mutex_unlock(mutex); |
| ok = (WAIT_OBJECT_0 == WaitForSingleObject(tls->pthread_cond_helper_mutex, mswaitrel)); |
| pthread_mutex_lock(mutex); |
| |
| return ok ? 0 : -1; |
| } |
| |
| static int pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex) |
| { |
| return pthread_cond_timedwait(cv, mutex, NULL); |
| } |
| |
| static int pthread_cond_signal(pthread_cond_t *cv) |
| { |
| int i; |
| HANDLE wkup = NULL; |
| BOOL ok = FALSE; |
| |
| EnterCriticalSection(&cv->threadIdSec); |
| if (cv->waitingthreadcount) { |
| wkup = cv->waitingthreadhdls[0]; |
| ok = SetEvent(wkup); |
| |
| for (i=1; i<cv->waitingthreadcount; i++) { |
| cv->waitingthreadhdls[i-1] = cv->waitingthreadhdls[i]; |
| } |
| cv->waitingthreadcount--; |
| |
| assert(ok); |
| } |
| LeaveCriticalSection(&cv->threadIdSec); |
| |
| return ok ? 0 : 1; |
| } |
| |
| static int pthread_cond_broadcast(pthread_cond_t *cv) |
| { |
| EnterCriticalSection(&cv->threadIdSec); |
| while (cv->waitingthreadcount) { |
| pthread_cond_signal(cv); |
| } |
| LeaveCriticalSection(&cv->threadIdSec); |
| |
| return 0; |
| } |
| |
| static int pthread_cond_destroy(pthread_cond_t *cv) |
| { |
| EnterCriticalSection(&cv->threadIdSec); |
| assert(cv->waitingthreadcount==0); |
| mg_free(cv->waitingthreadhdls); |
| cv->waitingthreadhdls = 0; |
| LeaveCriticalSection(&cv->threadIdSec); |
| DeleteCriticalSection(&cv->threadIdSec); |
| |
| return 0; |
| } |
| |
| /* For Windows, change all slashes to backslashes in path names. */ |
| static void change_slashes_to_backslashes(char *path) |
| { |
| int i; |
| |
| for (i = 0; path[i] != '\0'; i++) { |
| if (path[i] == '/') |
| path[i] = '\\'; |
| /* i > 0 check is to preserve UNC paths, like \\server\file.txt */ |
| if (path[i] == '\\' && i > 0) |
| while (path[i + 1] == '\\' || path[i + 1] == '/') |
| (void) memmove(path + i + 1, |
| path + i + 2, strlen(path + i + 1)); |
| } |
| } |
| |
| /* Encode 'path' which is assumed UTF-8 string, into UNICODE string. |
| wbuf and wbuf_len is a target buffer and its length. */ |
| static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len) |
| { |
| char buf[PATH_MAX], buf2[PATH_MAX]; |
| |
| mg_strlcpy(buf, path, sizeof(buf)); |
| change_slashes_to_backslashes(buf); |
| |
| /* Convert to Unicode and back. If doubly-converted string does not |
| match the original, something is fishy, reject. */ |
| memset(wbuf, 0, wbuf_len * sizeof(wchar_t)); |
| MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len); |
| WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2), |
| NULL, NULL); |
| if (strcmp(buf, buf2) != 0) { |
| wbuf[0] = L'\0'; |
| } |
| } |
| |
| #if defined(_WIN32_WCE) |
| static time_t time(time_t *ptime) |
| { |
| time_t t; |
| SYSTEMTIME st; |
| FILETIME ft; |
| |
| GetSystemTime(&st); |
| SystemTimeToFileTime(&st, &ft); |
| t = SYS2UNIX_TIME(ft.dwLowDateTime, ft.dwHighDateTime); |
| |
| if (ptime != NULL) { |
| *ptime = t; |
| } |
| |
| return t; |
| } |
| |
| static struct tm *localtime(const time_t *ptime, struct tm *ptm) |
| { |
| int64_t t = ((int64_t) *ptime) * RATE_DIFF + EPOCH_DIFF; |
| FILETIME ft, lft; |
| SYSTEMTIME st; |
| TIME_ZONE_INFORMATION tzinfo; |
| |
| if (ptm == NULL) { |
| return NULL; |
| } |
| |
| * (int64_t *) &ft = t; |
| FileTimeToLocalFileTime(&ft, &lft); |
| FileTimeToSystemTime(&lft, &st); |
| ptm->tm_year = st.wYear - 1900; |
| ptm->tm_mon = st.wMonth - 1; |
| ptm->tm_wday = st.wDayOfWeek; |
| ptm->tm_mday = st.wDay; |
| ptm->tm_hour = st.wHour; |
| ptm->tm_min = st.wMinute; |
| ptm->tm_sec = st.wSecond; |
| ptm->tm_yday = 0; /* hope nobody uses this */ |
| ptm->tm_isdst = |
| GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_DAYLIGHT ? 1 : 0; |
| |
| return ptm; |
| } |
| |
| static struct tm *gmtime(const time_t *ptime, struct tm *ptm) |
| { |
| /* FIXME(lsm): fix this. */ |
| return localtime(ptime, ptm); |
| } |
| |
| static size_t strftime(char *dst, size_t dst_size, const char *fmt, |
| const struct tm *tm) |
| { |
| (void) snprintf(dst, dst_size, "implement strftime() for WinCE"); |
| return 0; |
| } |
| #endif |
| |
| /* Windows happily opens files with some garbage at the end of file name. |
| For example, fopen("a.cgi ", "r") on Windows successfully opens |
| "a.cgi", despite one would expect an error back. |
| This function returns non-0 if path ends with some garbage. */ |
| static int path_cannot_disclose_cgi(const char *path) |
| { |
| static const char *allowed_last_characters = "_-"; |
| int last = path[strlen(path) - 1]; |
| return isalnum(last) || strchr(allowed_last_characters, last) != NULL; |
| } |
| |
| static int mg_stat(struct mg_connection *conn, const char *path, struct file *filep) |
| { |
| wchar_t wbuf[PATH_MAX]; |
| WIN32_FILE_ATTRIBUTE_DATA info; |
| |
| if (!is_file_in_memory(conn, path, filep)) { |
| to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
| if (GetFileAttributesExW(wbuf, GetFileExInfoStandard, &info) != 0) { |
| filep->size = MAKEUQUAD(info.nFileSizeLow, info.nFileSizeHigh); |
| filep->modification_time = SYS2UNIX_TIME( |
| info.ftLastWriteTime.dwLowDateTime, |
| info.ftLastWriteTime.dwHighDateTime); |
| filep->is_directory = info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY; |
| /* If file name is fishy, reset the file structure and return |
| error. |
| Note it is important to reset, not just return the error, cause |
| functions like is_file_opened() check the struct. */ |
| if (!filep->is_directory && !path_cannot_disclose_cgi(path)) { |
| memset(filep, 0, sizeof(*filep)); |
| } |
| } |
| } |
| |
| return filep->membuf != NULL || filep->modification_time != 0; |
| } |
| |
| static int mg_remove(const char *path) |
| { |
| wchar_t wbuf[PATH_MAX]; |
| to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); |
| return DeleteFileW(wbuf) ? 0 : -1; |
| } |
| |
| static int mg_mkdir(const char *path, int mode) |
| { |
| char buf[PATH_MAX]; |
| wchar_t wbuf[PATH_MAX]; |
| |
| (void) mode; |
| mg_strlcpy(buf, path, sizeof(buf)); |
| change_slashes_to_backslashes(buf); |
| |
| (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, ARRAY_SIZE(wbuf)); |
| |
| return CreateDirectoryW(wbuf, NULL) ? 0 : -1; |
| } |
| |
| /* Implementation of POSIX opendir/closedir/readdir for Windows. */ |
| static DIR * opendir(const char *name) |
| { |
| DIR *dir = NULL; |
| wchar_t wpath[PATH_MAX]; |
| DWORD attrs; |
| |
| if (name == NULL) { |
| SetLastError(ERROR_BAD_ARGUMENTS); |
| } else if ((dir = (DIR *) mg_malloc(sizeof(*dir))) == NULL) { |
| SetLastError(ERROR_NOT_ENOUGH_MEMORY); |
| } else { |
| to_unicode(name, wpath, ARRAY_SIZE(wpath)); |
| attrs = GetFileAttributesW(wpath); |
| if (attrs != 0xFFFFFFFF && |
| ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) { |
| (void) wcscat(wpath, L"\\*"); |
| dir->handle = FindFirstFileW(wpath, &dir->info); |
| dir->result.d_name[0] = '\0'; |
| } else { |
| mg_free(dir); |
| dir = NULL; |
| } |
| } |
| |
| return dir; |
| } |
| |
| static int closedir(DIR *dir) |
| { |
| int result = 0; |
| |
| if (dir != NULL) { |
| if (dir->handle != INVALID_HANDLE_VALUE) |
| result = FindClose(dir->handle) ? 0 : -1; |
| |
| mg_free(dir); |
| } else { |
| result = -1; |
| SetLastError(ERROR_BAD_ARGUMENTS); |
| } |
| |
| return result; |
| } |
| |
| static struct dirent *readdir(DIR *dir) |
| { |
| struct dirent *result = 0; |
| |
| if (dir) { |
| if (dir->handle != INVALID_HANDLE_VALUE) { |
| result = &dir->result; |
| (void) WideCharToMultiByte(CP_UTF8, 0, |
| dir->info.cFileName, -1, result->d_name, |
| sizeof(result->d_name), NULL, NULL); |
| |
| if (!FindNextFileW(dir->handle, &dir->info)) { |
| (void) FindClose(dir->handle); |
| dir->handle = INVALID_HANDLE_VALUE; |
| } |
| |
| } else { |
| SetLastError(ERROR_FILE_NOT_FOUND); |
| } |
| } else { |
| SetLastError(ERROR_BAD_ARGUMENTS); |
| } |
| |
| return result; |
| } |
| |
| #ifndef HAVE_POLL |
| static int poll(struct pollfd *pfd, int n, int milliseconds) |
| { |
| struct timeval tv; |
| fd_set set; |
| int i, result; |
| SOCKET maxfd = 0; |
| |
| tv.tv_sec = milliseconds / 1000; |
| tv.tv_usec = (milliseconds % 1000) * 1000; |
| FD_ZERO(&set); |
| |
| for (i = 0; i < n; i++) { |
| FD_SET((SOCKET) pfd[i].fd, &set); |
| pfd[i].revents = 0; |
| |
| if (pfd[i].fd > maxfd) { |
| maxfd = pfd[i].fd; |
| } |
| } |
| |
| if ((result = select((int)maxfd + 1, &set, NULL, NULL, &tv)) > 0) { |
| for (i = 0; i < n; i++) { |
| if (FD_ISSET(pfd[i].fd, &set)) { |
| pfd[i].revents = POLLIN; |
| } |
| } |
| } |
| |
| return result; |
| } |
| #endif /* HAVE_POLL */ |
| |
| static void set_close_on_exec(SOCKET sock, struct mg_connection *conn /* may be null */) |
| { |
| (void) conn; /* Unused. */ |
| (void) SetHandleInformation((HANDLE) sock, HANDLE_FLAG_INHERIT, 0); |
| } |
| |
| int mg_start_thread(mg_thread_func_t f, void *p) |
| { |
| #if defined(USE_STACK_SIZE) && (USE_STACK_SIZE > 1) |
| /* Compile-time option to control stack size, e.g. -DUSE_STACK_SIZE=16384 */ |
| return ((_beginthread((void (__cdecl *)(void *)) f, USE_STACK_SIZE, p) == ((uintptr_t)(-1L))) ? -1 : 0); |
| #else |
| return ((_beginthread((void (__cdecl *)(void *)) f, 0, p) == ((uintptr_t)(-1L))) ? -1 : 0); |
| #endif /* defined(USE_STACK_SIZE) && (USE_STACK_SIZE > 1) */ |
| } |
| |
| /* Start a thread storing the thread context. */ |
| |
| static int mg_start_thread_with_id(unsigned (__stdcall *f)(void *), void *p, |
| pthread_t *threadidptr) |
| { |
| uintptr_t uip; |
| HANDLE threadhandle; |
| int result = -1; |
| |
| uip = _beginthreadex(NULL, 0, (unsigned (__stdcall *)(void *)) f, p, 0, |
| NULL); |
| threadhandle = (HANDLE) uip; |
| if ((uip != (uintptr_t)(-1L)) && (threadidptr != NULL)) { |
| *threadidptr = threadhandle; |
| result = 0; |
| } |
| |
| return result; |
| } |
| |
| /* Wait for a thread to finish. */ |
| |
| static int mg_join_thread(pthread_t threadid) |
| { |
| int result; |
| DWORD dwevent; |
| |
| result = -1; |
| dwevent = WaitForSingleObject(threadid, INFINITE); |
| if (dwevent == WAIT_FAILED) { |
| int err; |
| |
| err = GetLastError(); |
| DEBUG_TRACE("WaitForSingleObject() failed, error %d", err); |
| } else { |
| if (dwevent == WAIT_OBJECT_0) { |
| CloseHandle(threadid); |
| result = 0; |
| } |
| } |
| |
| return result; |
| } |
| |
| static HANDLE dlopen(const char *dll_name, int flags) |
| { |
| wchar_t wbuf[PATH_MAX]; |
| (void) flags; |
| to_unicode(dll_name, wbuf, ARRAY_SIZE(wbuf)); |
| return LoadLibraryW(wbuf); |
| } |
| |
| static int dlclose(void *handle) |
| { |
| int result; |
| |
| if (FreeLibrary((HMODULE) handle) != 0) { |
| result = 0; |
| } else { |
| result = -1; |
| } |
| |
| return result; |
| } |
| |
| #if !defined(NO_CGI) |
| #define SIGKILL 0 |
| static int kill(pid_t pid, int sig_num) |
| { |
| (void) TerminateProcess(pid, sig_num); |
| (void) CloseHandle(pid); |
| return 0; |
| } |
| |
| static void trim_trailing_whitespaces(char *s) |
| { |
| char *e = s + strlen(s) - 1; |
| while (e > s && isspace(* (unsigned char *) e)) { |
| *e-- = '\0'; |
| } |
| } |
| |
| static pid_t spawn_process(struct mg_connection *conn, const char *prog, |
| char *envblk, char *envp[], int fdin, |
| int fdout, const char *dir) |
| { |
| HANDLE me; |
| char *p, *interp, full_interp[PATH_MAX], full_dir[PATH_MAX], |
| cmdline[PATH_MAX], buf[PATH_MAX]; |
| struct file file = STRUCT_FILE_INITIALIZER; |
| STARTUPINFOA si; |
| PROCESS_INFORMATION pi = { 0 }; |
| |
| (void) envp; |
| |
| memset(&si, 0, sizeof(si)); |
| si.cb = sizeof(si); |
| |
| /* TODO(lsm): redirect CGI errors to the error log file */ |
| si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; |
| si.wShowWindow = SW_HIDE; |
| |
| me = GetCurrentProcess(); |
| DuplicateHandle(me, (HANDLE) _get_osfhandle(fdin), me, |
| &si.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS); |
| DuplicateHandle(me, (HANDLE) _get_osfhandle(fdout), me, |
| &si.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS); |
| |
| /* If CGI file is a script, try to read the interpreter line */ |
| interp = conn->ctx->config[CGI_INTERPRETER]; |
| if (interp == NULL) { |
| buf[0] = buf[1] = '\0'; |
| |
| /* Read the first line of the script into the buffer */ |
| snprintf(cmdline, sizeof(cmdline), "%s%c%s", dir, '/', prog); |
| if (mg_fopen(conn, cmdline, "r", &file)) { |
| p = (char *) file.membuf; |
| mg_fgets(buf, sizeof(buf), &file, &p); |
| mg_fclose(&file); |
| buf[sizeof(buf) - 1] = '\0'; |
| } |
| |
| if (buf[0] == '#' && buf[1] == '!') { |
| trim_trailing_whitespaces(buf + 2); |
| } else { |
| buf[2] = '\0'; |
| } |
| interp = buf + 2; |
| } |
| |
| if (interp[0] != '\0') { |
| GetFullPathNameA(interp, sizeof(full_interp), full_interp, NULL); |
| interp = full_interp; |
| } |
| GetFullPathNameA(dir, sizeof(full_dir), full_dir, NULL); |
| |
| mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s\"%s\\%s\"", |
| interp, interp[0] == '\0' ? "" : " ", full_dir, prog); |
| |
| DEBUG_TRACE("Running [%s]", cmdline); |
| if (CreateProcessA(NULL, cmdline, NULL, NULL, TRUE, |
| CREATE_NEW_PROCESS_GROUP, envblk, NULL, &si, &pi) == 0) { |
| mg_cry(conn, "%s: CreateProcess(%s): %ld", |
| __func__, cmdline, ERRNO); |
| pi.hProcess = (pid_t) -1; |
| } |
| |
| (void) CloseHandle(si.hStdOutput); |
| (void) CloseHandle(si.hStdInput); |
| if (pi.hThread != NULL) |
| (void) CloseHandle(pi.hThread); |
| |
| return (pid_t) pi.hProcess; |
| } |
| #endif /* !NO_CGI */ |
| |
| static int set_non_blocking_mode(SOCKET sock) |
| { |
| unsigned long on = 1; |
| return ioctlsocket(sock, FIONBIO, &on); |
| } |
| |
| #else |
| static int mg_stat(struct mg_connection *conn, const char *path, |
| struct file *filep) |
| { |
| struct stat st; |
| |
| if (!is_file_in_memory(conn, path, filep) && !stat(path, &st)) { |
| filep->size = st.st_size; |
| filep->modification_time = st.st_mtime; |
| filep->is_directory = S_ISDIR(st.st_mode); |
| } else { |
| filep->modification_time = (time_t) 0; |
| } |
| |
| return filep->membuf != NULL || filep->modification_time != (time_t) 0; |
| } |
| |
| static void set_close_on_exec(int fd, struct mg_connection *conn /* may be null */) |
| { |
| if (fcntl(fd, F_SETFD, FD_CLOEXEC) != 0) { |
| if (conn) { |
| mg_cry(conn, "%s: fcntl(F_SETFD FD_CLOEXEC) failed: %s", __func__, strerror(ERRNO)); |
| } |
| } |
| } |
| |
| int mg_start_thread(mg_thread_func_t func, void *param) |
| { |
| pthread_t thread_id; |
| pthread_attr_t attr; |
| int result; |
| |
| (void) pthread_attr_init(&attr); |
| (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); |
| |
| #if defined(USE_STACK_SIZE) && (USE_STACK_SIZE > 1) |
| /* Compile-time option to control stack size, |
| e.g. -DUSE_STACK_SIZE=16384 */ |
| (void) pthread_attr_setstacksize(&attr, USE_STACK_SIZE); |
| #endif /* defined(USE_STACK_SIZE) && (USE_STACK_SIZE > 1) */ |
| |
| result = pthread_create(&thread_id, &attr, func, param); |
| pthread_attr_destroy(&attr); |
| |
| return result; |
| } |
| |
| /* Start a thread storing the thread context. */ |
| |
| static int mg_start_thread_with_id(mg_thread_func_t func, void *param, pthread_t *threadidptr) |
| { |
| pthread_t thread_id; |
| pthread_attr_t attr; |
| int result; |
| |
| (void) pthread_attr_init(&attr); |
| |
| #if defined(USE_STACK_SIZE) && (USE_STACK_SIZE > 1) |
| /* Compile-time option to control stack size, |
| e.g. -DUSE_STACK_SIZE=16384 */ |
| (void) pthread_attr_setstacksize(&attr, USE_STACK_SIZE); |
| #endif /* defined(USE_STACK_SIZE) && USE_STACK_SIZE > 1 */ |
| |
| result = pthread_create(&thread_id, &attr, func, param); |
| pthread_attr_destroy(&attr); |
| if ((result == 0) && (threadidptr != NULL)) { |
| *threadidptr = thread_id; |
| } |
| return result; |
| } |
| |
| /* Wait for a thread to finish. */ |
| |
| static int mg_join_thread(pthread_t threadid) |
| { |
| int result; |
| |
| result = pthread_join(threadid, NULL); |
| return result; |
| } |
| |
| #ifndef NO_CGI |
| static pid_t spawn_process(struct mg_connection *conn, const char *prog, |
| char *envblk, char *envp[], int fdin, |
| int fdout, const char *dir) |
| { |
| pid_t pid; |
| const char *interp; |
| |
| (void) envblk; |
| |
| if ((pid = fork()) == -1) { |
| /* Parent */ |
| send_http_error(conn, 500, NULL, |
| "Error: Creating CGI process\nfork(): %s", strerror(ERRNO)); |
| } else if (pid == 0) { |
| /* Child */ |
| if (chdir(dir) != 0) { |
| mg_cry(conn, "%s: chdir(%s): %s", __func__, dir, strerror(ERRNO)); |
| } else if (dup2(fdin, 0) == -1) { |
| mg_cry(conn, "%s: dup2(%d, 0): %s", __func__, fdin, strerror(ERRNO)); |
| } else if (dup2(fdout, 1) == -1) { |
| mg_cry(conn, "%s: dup2(%d, 1): %s", __func__, fdout, strerror(ERRNO)); |
| } else { |
| /* Not redirecting stderr to stdout, to avoid output being littered |
| with the error messages. */ |
| (void) close(fdin); |
| (void) close(fdout); |
| |
| /* After exec, all signal handlers are restored to their default |
| values, with one exception of SIGCHLD. According to |
| POSIX.1-2001 and Linux's implementation, SIGCHLD's handler will |
| leave unchanged after exec if it was set to be ignored. Restore |
| it to default action. */ |
| signal(SIGCHLD, SIG_DFL); |
| |
| interp = conn->ctx->config[CGI_INTERPRETER]; |
| if (interp == NULL) { |
| (void) execle(prog, prog, NULL, envp); |
| mg_cry(conn, "%s: execle(%s): %s", __func__, prog, strerror(ERRNO)); |
| } else { |
| (void) execle(interp, interp, prog, NULL, envp); |
| mg_cry(conn, "%s: execle(%s %s): %s", __func__, interp, prog, |
| strerror(ERRNO)); |
| } |
| } |
| exit(EXIT_FAILURE); |
| } |
| |
| return pid; |
| } |
| #endif /* !NO_CGI */ |
| |
| static int set_non_blocking_mode(SOCKET sock) |
| { |
| int flags; |
| |
| flags = fcntl(sock, F_GETFL, 0); |
| (void) fcntl(sock, F_SETFL, flags | O_NONBLOCK); |
| |
| return 0; |
| } |
| #endif /* _WIN32 */ |
| |
| /* Write data to the IO channel - opened file descriptor, socket or SSL |
| descriptor. Return number of bytes written. */ |
| static int64_t push(FILE *fp, SOCKET sock, SSL *ssl, const char *buf, int64_t len) |
| { |
| int64_t sent; |
| int n, k; |
| |
| (void) ssl; /* Get rid of warning */ |
| sent = 0; |
| while (sent < len) { |
| |
| /* How many bytes we send in this iteration */ |
| k = len - sent > INT_MAX ? INT_MAX : (int) (len - sent); |
| |
| #ifndef NO_SSL |
| if (ssl != NULL) { |
| n = SSL_write(ssl, buf + sent, k); |
| } else |
| #endif |
| if (fp != NULL) { |
| n = (int) fwrite(buf + sent, 1, (size_t) k, fp); |
| if (ferror(fp)) |
| n = -1; |
| } else { |
| n = send(sock, buf + sent, (size_t) k, MSG_NOSIGNAL); |
| } |
| |
| if (n <= 0) |
| break; |
| |
| sent += n; |
| } |
| |
| return sent; |
| } |
| |
| /* Read from IO channel - opened file descriptor, socket, or SSL descriptor. |
| Return negative value on error, or number of bytes read on success. */ |
| static int pull(FILE *fp, struct mg_connection *conn, char *buf, int len) |
| { |
| int nread; |
| |
| if (fp != NULL) { |
| /* Use read() instead of fread(), because if we're reading from the |
| CGI pipe, fread() may block until IO buffer is filled up. We cannot |
| afford to block and must pass all read bytes immediately to the |
| client. */ |
| nread = read(fileno(fp), buf, (size_t) len); |
| #ifndef NO_SSL |
| } else if (conn->ssl != NULL) { |
| nread = SSL_read(conn->ssl, buf, len); |
| #endif |
| } else { |
| nread = recv(conn->client.sock, buf, (size_t) len, 0); |
| } |
| |
| return conn->ctx->stop_flag ? -1 : nread; |
| } |
| |
| static int pull_all(FILE *fp, struct mg_connection *conn, char *buf, int len) |
| { |
| int n, nread = 0; |
| |
| while (len > 0 && conn->ctx->stop_flag == 0) { |
| n = pull(fp, conn, buf + nread, len); |
| if (n < 0) { |
| nread = n; /* Propagate the error */ |
| break; |
| } else if (n == 0) { |
| break; /* No more data to read */ |
| } else { |
| conn->consumed_content += n; |
| nread += n; |
| len -= n; |
| } |
| } |
| |
| return nread; |
| } |
| |
| int mg_read(struct mg_connection *conn, void *buf, size_t len) |
| { |
| int64_t n, buffered_len, nread; |
| int64_t len64 = (int64_t)(len > INT_MAX ? INT_MAX : len); /* since the return value is int, we may not read more bytes */ |
| const char *body; |
| |
| /* If Content-Length is not set for a PUT or POST request, read until socket is closed */ |
| if (conn->consumed_content == 0 && conn->content_len == -1) { |
| conn->content_len = INT64_MAX; |
| conn->must_close = 1; |
| } |
| |
| nread = 0; |
| if (conn->consumed_content < conn->content_len) { |
| /* Adjust number of bytes to read. */ |
| int64_t left_to_read = conn->content_len - conn->consumed_content; |
| if (left_to_read < len64) { |
| /* Do not reade more than the total content length of the request. */ |
| len64 = left_to_read; |
| } |
| |
| /* Return buffered data */ |
| buffered_len = (int64_t)(conn->data_len) - (int64_t)conn->request_len - conn->consumed_content; |
| if (buffered_len > 0) { |
| if (len64 < buffered_len) { |
| buffered_len = len64; |
| } |
| body = conn->buf + conn->request_len + conn->consumed_content; |
| memcpy(buf, body, (size_t) buffered_len); |
| len64 -= buffered_len; |
| conn->consumed_content += buffered_len; |
| nread += buffered_len; |
| buf = (char *) buf + buffered_len; |
| } |
| |
| /* We have returned all buffered data. Read new data from the remote |
| socket. */ |
| if ((n = pull_all(NULL, conn, (char *) buf, (int)len64)) >= 0) { |
| nread += n; |
| } else { |
| nread = (nread > 0 ? nread : n); |
| } |
| } |
| return (int)nread; |
| } |
| |
| int mg_write(struct mg_connection *conn, const void *buf, size_t len) |
| { |
| time_t now; |
| int64_t n, total, allowed; |
| |
| if (conn->throttle > 0) { |
| if ((now = time(NULL)) != conn->last_throttle_time) { |
| conn->last_throttle_time = now; |
| conn->last_throttle_bytes = 0; |
| } |
| allowed = conn->throttle - conn->last_throttle_bytes; |
| if (allowed > (int64_t) len) { |
| allowed = len; |
| } |
| if ((total = push(NULL, conn->client.sock, conn->ssl, (const char *) buf, |
| (int64_t) allowed)) == allowed) { |
| buf = (char *) buf + total; |
| conn->last_throttle_bytes += total; |
| while (total < (int64_t) len && conn->ctx->stop_flag == 0) { |
| allowed = conn->throttle > (int64_t) len - total ? |
| (int64_t) len - total : conn->throttle; |
| if ((n = push(NULL, conn->client.sock, conn->ssl, (const char *) buf, |
| (int64_t) allowed)) != allowed) { |
| break; |
| } |
| sleep(1); |
| conn->last_throttle_bytes = allowed; |
| conn->last_throttle_time = time(NULL); |
| buf = (char *) buf + n; |
| total += n; |
| } |
| } |
| } else { |
| total = push(NULL, conn->client.sock, conn->ssl, (const char *) buf, |
| (int64_t) len); |
| } |
| return (int) total; |
| } |
| |
| /* Alternative alloc_vprintf() for non-compliant C runtimes */ |
| static int alloc_vprintf2(char **buf, const char *fmt, va_list ap) |
| { |
| va_list ap_copy; |
| int size = MG_BUF_LEN; |
| int len = -1; |
| |
| *buf = NULL; |
| while (len == -1) { |
| if (*buf) mg_free(*buf); |
| *buf = (char *)mg_malloc(size *= 4); |
| if (!*buf) break; |
| va_copy(ap_copy, ap); |
| len = vsnprintf(*buf, size, fmt, ap_copy); |
| va_end(ap_copy); |
| } |
| |
| return len; |
| } |
| |
| /* Print message to buffer. If buffer is large enough to hold the message, |
| return buffer. If buffer is to small, allocate large enough buffer on heap, |
| and return allocated buffer. */ |
| static int alloc_vprintf(char **buf, size_t size, const char *fmt, va_list ap) |
| { |
| va_list ap_copy; |
| int len; |
| |
| /* Windows is not standard-compliant, and vsnprintf() returns -1 if |
| buffer is too small. Also, older versions of msvcrt.dll do not have |
| _vscprintf(). However, if size is 0, vsnprintf() behaves correctly. |
| Therefore, we make two passes: on first pass, get required message |
| length. |
| On second pass, actually print the message. */ |
| va_copy(ap_copy, ap); |
| len = vsnprintf(NULL, 0, fmt, ap_copy); |
| va_end(ap_copy); |
| |
| if (len < 0) { |
| /* C runtime is not standard compliant, vsnprintf() returned -1. |
| Switch to alternative code path that uses incremental allocations. |
| */ |
| va_copy(ap_copy, ap); |
| len = alloc_vprintf2(buf, fmt, ap); |
| va_end(ap_copy); |
| } else if (len > (int) size && |
| (size = len + 1) > 0 && |
| (*buf = (char *) mg_malloc(size)) == NULL) { |
| len = -1; /* Allocation failed, mark failure */ |
| } else { |
| va_copy(ap_copy, ap); |
| IGNORE_UNUSED_RESULT(vsnprintf(*buf, size, fmt, ap_copy)); |
| va_end(ap_copy); |
| } |
| |
| return len; |
| } |
| |
| int mg_vprintf(struct mg_connection *conn, const char *fmt, va_list ap) |
| { |
| char mem[MG_BUF_LEN], *buf = mem; |
| int len; |
| |
| if ((len = alloc_vprintf(&buf, sizeof(mem), fmt, ap)) > 0) { |
| len = mg_write(conn, buf, (size_t) len); |
| } |
| if (buf != mem && buf != NULL) { |
| mg_free(buf); |
| } |
| |
| return len; |
| } |
| |
| int mg_printf(struct mg_connection *conn, const char *fmt, ...) |
| { |
| va_list ap; |
| int result; |
| |
| va_start(ap, fmt); |
| result = mg_vprintf(conn, fmt, ap); |
| va_end(ap); |
| |
| return result; |
| } |
| |
| int mg_url_decode(const char *src, int src_len, char *dst, |
| int dst_len, int is_form_url_encoded) |
| { |
| int i, j, a, b; |
| #define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W') |
| |
| for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) { |
| if (i < src_len - 2 && src[i] == '%' && |
| isxdigit(* (const unsigned char *) (src + i + 1)) && |
| isxdigit(* (const unsigned char *) (src + i + 2))) { |
| a = tolower(* (const unsigned char *) (src + i + 1)); |
| b = tolower(* (const unsigned char *) (src + i + 2)); |
| dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b)); |
| i += 2; |
| } else if (is_form_url_encoded && src[i] == '+') { |
| dst[j] = ' '; |
| } else { |
| dst[j] = src[i]; |
| } |
| } |
| |
| dst[j] = '\0'; /* Null-terminate the destination */ |
| |
| return i >= src_len ? j : -1; |
| } |
| |
| int mg_get_var(const char *data, size_t data_len, const char *name, |
| char *dst, size_t dst_len) |
| { |
| return mg_get_var2(data,data_len,name,dst,dst_len,0); |
| } |
| |
| int mg_get_var2(const char *data, size_t data_len, const char *name, |
| char *dst, size_t dst_len, size_t occurrence) |
| { |
| const char *p, *e, *s; |
| size_t name_len; |
| int len; |
| |
| if (dst == NULL || dst_len == 0) { |
| len = -2; |
| } else if (data == NULL || name == NULL || data_len == 0) { |
| len = -1; |
| dst[0] = '\0'; |
| } else { |
| name_len = strlen(name); |
| e = data + data_len; |
| len = -1; |
| dst[0] = '\0'; |
| |
| /* data is "var1=val1&var2=val2...". Find variable first */ |
| for (p = data; p + name_len < e; p++) { |
| if ((p == data || p[-1] == '&') && p[name_len] == '=' && |
| !mg_strncasecmp(name, p, name_len) && 0 == occurrence--) { |
| |
| /* Point p to variable value */ |
| p += name_len + 1; |
| |
| /* Point s to the end of the value */ |
| s = (const char *) memchr(p, '&', (size_t)(e - p)); |
| if (s == NULL) { |
| s = e; |
| } |
| assert(s >= p); |
| |
| /* Decode variable into destination buffer */ |
| len = mg_url_decode(p, (int)(s - p), dst, (int)dst_len, 1); |
| |
| /* Redirect error code from -1 to -2 (destination buffer too |
| small). */ |
| if (len == -1) { |
| len = -2; |
| } |
| break; |
| } |
| } |
| } |
| |
| return len; |
| } |
| |
| int mg_get_cookie(const char *cookie_header, const char *var_name, |
| char *dst, size_t dst_size) |
| { |
| const char *s, *p, *end; |
| int name_len, len = -1; |
| |
| if (dst == NULL || dst_size == 0) { |
| len = -2; |
| } else if (var_name == NULL || (s = cookie_header) == NULL) { |
| len = -1; |
| dst[0] = '\0'; |
| } else { |
| name_len = (int) strlen(var_name); |
| end = s + strlen(s); |
| dst[0] = '\0'; |
| |
| for (; (s = mg_strcasestr(s, var_name)) != NULL; s += name_len) { |
| if (s[name_len] == '=') { |
| s += name_len + 1; |
| if ((p = strchr(s, ' ')) == NULL) |
| p = end; |
| if (p[-1] == ';') |
| p--; |
| if (*s == '"' && p[-1] == '"' && p > s + 1) { |
| s++; |
| p--; |
| } |
| if ((size_t) (p - s) < dst_size) { |
| len = (int)(p - s); |
| mg_strlcpy(dst, s, (size_t) len + 1); |
| } else { |
| len = -3; |
| } |
| break; |
| } |
| } |
| } |
| return len; |
| } |
| |
| #if defined(USE_WEBSOCKET) || defined(USE_LUA) |
| static void base64_encode(const unsigned char *src, int src_len, char *dst) |
| { |
| static const char *b64 = |
| "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
| int i, j, a, b, c; |
| |
| for (i = j = 0; i < src_len; i += 3) { |
| a = src[i]; |
| b = i + 1 >= src_len ? 0 : src[i + 1]; |
| c = i + 2 >= src_len ? 0 : src[i + 2]; |
| |
| dst[j++] = b64[a >> 2]; |
| dst[j++] = b64[((a & 3) << 4) | (b >> 4)]; |
| if (i + 1 < src_len) { |
| dst[j++] = b64[(b & 15) << 2 | (c >> 6)]; |
| } |
| if (i + 2 < src_len) { |
| dst[j++] = b64[c & 63]; |
| } |
| } |
| while (j % 4 != 0) { |
| dst[j++] = '='; |
| } |
| dst[j++] = '\0'; |
| } |
| |
| static unsigned char b64reverse(char letter) { |
| if (letter>='A' && letter<='Z') return letter-'A'; |
| if (letter>='a' && letter<='z') return letter-'a'+26; |
| if (letter>='0' && letter<='9') return letter-'0'+52; |
| if (letter=='+') return 62; |
| if (letter=='/') return 63; |
| if (letter=='=') return 255; /* normal end */ |
| return 254; /* error */ |
| } |
| |
| static int base64_decode(const unsigned char *src, int src_len, char *dst, size_t *dst_len) |
| { |
| int i; |
| unsigned char a, b, c, d; |
| |
| *dst_len = 0; |
| |
| for (i = 0; i < src_len; i += 4) { |
| a = b64reverse(src[i]); |
| if (a>=254) return i; |
| |
| b = b64reverse(i + 1 >= src_len ? 0 : src[i + 1]); |
| if (b>=254) return i+1; |
| |
| c = b64reverse(i + 2 >= src_len ? 0 : src[i + 2]); |
| if (c==254) return i+2; |
| |
| d = b64reverse(i + 3 >= src_len ? 0 : src[i + 3]); |
| if (c==254) return i+3; |
| |
| dst[(*dst_len)++] = (a << 2) + (b >> 4); |
| if (c!=255) { |
| dst[(*dst_len)++] = (b << 4) + (c >> 2); |
| if (d!=255) { |
| dst[(*dst_len)++] = (c << 6) + d; |
| } |
| } |
| } |
| return -1; |
| } |
| #endif |
| |
| static int is_put_or_delete_method(const struct mg_connection *conn) |
| { |
| const char *s = conn->request_info.request_method; |
| return s != NULL && (!strcmp(s, "PUT") || |
| !strcmp(s, "DELETE") || |
| !strcmp(s, "MKCOL")); |
| } |
| |
| static void interpret_uri(struct mg_connection *conn, /* in: request */ |
| char *filename, /* out: filename */ |
| size_t filename_buf_len, /* in: size of filename buffer */ |
| struct file *filep, /* out: file structure */ |
| int * is_script_ressource, /* out: handled by a script? */ |
| int * is_websocket_request, /* out: websocket connetion? */ |
| int * is_put_or_delete_request /* out: put/delete a file? */ |
| ) |
| { |
| struct vec a, b; |
| const char *rewrite, |
| *uri = conn->request_info.uri, |
| *root = conn->ctx->config[DOCUMENT_ROOT]; |
| char *p; |
| int match_len; |
| char gz_path[PATH_MAX]; |
| char const* accept_encoding; |
| |
| *is_script_ressource = 0; |
| *is_put_or_delete_request = is_put_or_delete_method(conn); |
| |
| #if defined(USE_WEBSOCKET) |
| *is_websocket_request = is_websocket_protocol(conn); |
| if (*is_websocket_request && conn->ctx->config[WEBSOCKET_ROOT]) { |
| root = conn->ctx->config[WEBSOCKET_ROOT]; |
| } |
| #else |
| *is_websocket_request = 0; |
| #endif |
| |
| /* Note that root == NULL is a regular use case here. This occurs, |
| if all requests are handled by callbacks, so the WEBSOCKET_ROOT |
| config is not required. */ |
| |
| /* Using buf_len - 1 because memmove() for PATH_INFO may shift part |
| of the path one byte on the right. |
| If document_root is NULL, leave the file empty. */ |
| mg_snprintf(conn, filename, filename_buf_len - 1, "%s%s", |
| root == NULL ? "" : root, |
| root == NULL ? "" : uri); |
| |
| rewrite = conn->ctx->config[REWRITE]; |
| while ((rewrite = next_option(rewrite, &a, &b)) != NULL) { |
| if ((match_len = match_prefix(a.ptr, (int) a.len, uri)) > 0) { |
| mg_snprintf(conn, filename, filename_buf_len - 1, "%.*s%s", (int) b.len, b.ptr, |
| uri + match_len); |
| break; |
| } |
| } |
| |
| /* Local file path and name, corresponding to requested URI |
| is now stored in "filename" variable. */ |
| if (mg_stat(conn, filename, filep)) { |
| /* File exists. Check if it is a script type. */ |
| if (0 |
| #if !defined(NO_CGI) |
| || |
| match_prefix(conn->ctx->config[CGI_EXTENSIONS], |
| (int)strlen(conn->ctx->config[CGI_EXTENSIONS]), filename) > 0 |
| #endif |
| #if defined(USE_LUA) |
| || |
| match_prefix(conn->ctx->config[LUA_SCRIPT_EXTENSIONS], |
| (int)strlen(conn->ctx->config[LUA_SCRIPT_EXTENSIONS]), filename) > 0 |
| #endif |
| ) { |
| /* The request addresses a CGI script or a Lua script. The URI corresponds |
| to the script itself (like /path/script.cgi), and there is no additional |
| resource path (like /path/script.cgi/something). |
| Requests that modify (replace or delete) a resource, like PUT and DELETE |
| requests, should replace/delete the script file. |
| Requests that read or write from/to a resource, like GET and POST requests, |
| should call the script and return the generated response. */ |
| *is_script_ressource = !is_put_or_delete_request; |
| } |
| return; |
| } |
| |
| /* If we can't find the actual file, look for the file |
| with the same name but a .gz extension. If we find it, |
| use that and set the gzipped flag in the file struct |
| to indicate that the response need to have the content- |
| encoding: gzip header. |
| We can only do this if the browser declares support. */ |
| if ((accept_encoding = mg_get_header(conn, "Accept-Encoding")) != NULL) { |
| if (strstr(accept_encoding,"gzip") != NULL) { |
| snprintf(gz_path, sizeof(gz_path), "%s.gz", filename); |
| if (mg_stat(conn, gz_path, filep)) { |
| filep->gzipped = 1; |
| /* Currently gz files can not be scripts. */ |
| return; |
| } |
| } |
| } |
| |
| /* Support PATH_INFO for CGI scripts. */ |
| for (p = filename + strlen(filename); p > filename + 1; p--) { |
| if (*p == '/') { |
| *p = '\0'; |
| if ((0 |
| #if !defined(NO_CGI) |
| || |
| match_prefix(conn->ctx->config[CGI_EXTENSIONS], |
| (int)strlen(conn->ctx->config[CGI_EXTENSIONS]), filename) > 0 |
| #endif |
| #if defined(USE_LUA) |
| || |
| match_prefix(conn->ctx->config[LUA_SCRIPT_EXTENSIONS], |
| (int)strlen(conn->ctx->config[LUA_SCRIPT_EXTENSIONS]), filename) > 0 |
| #endif |
| ) && mg_stat(conn, filename, filep)) { |
| /* Shift PATH_INFO block one character right, e.g. |
| "/x.cgi/foo/bar\x00" => "/x.cgi\x00/foo/bar\x00" |
| conn->path_info is pointing to the local variable "path" |
| declared in handle_request(), so PATH_INFO is not valid |
| after handle_request returns. */ |
| conn->path_info = p + 1; |
| memmove(p + 2, p + 1, strlen(p + 1) + 1); /* +1 is for |
| trailing \0 */ |
| p[1] = '/'; |
| *is_script_ressource = 1; |
| break; |
| } else { |
| *p = '/'; |
| } |
| } |
| } |
| } |
| |
| /* Check whether full request is buffered. Return: |
| -1 if request is malformed |
| 0 if request is not yet fully buffered |
| >0 actual request length, including last \r\n\r\n */ |
| static int get_request_len(const char *buf, int buflen) |
| { |
| const char *s, *e; |
| int len = 0; |
| |
| for (s = buf, e = s + buflen - 1; len <= 0 && s < e; s++) |
| /* Control characters are not allowed but >=128 is. */ |
| if (!isprint(* (const unsigned char *) s) && *s != '\r' && |
| *s != '\n' && * (const unsigned char *) s < 128) { |
| len = -1; |
| break; /* [i_a] abort scan as soon as one malformed character is |
| found; */ |
| /* don't let subsequent \r\n\r\n win us over anyhow */ |
| } else if (s[0] == '\n' && s[1] == '\n') { |
| len = (int) (s - buf) + 2; |
| } else if (s[0] == '\n' && &s[1] < e && |
| s[1] == '\r' && s[2] == '\n') { |
| len = (int) (s - buf) + 3; |
| } |
| |
| return len; |
| } |
| |
| /* Convert month to the month number. Return -1 on error, or month number */ |
| static int get_month_index(const char *s) |
| { |
| size_t i; |
| |
| for (i = 0; i < ARRAY_SIZE(month_names); i++) |
| if (!strcmp(s, month_names[i])) |
| return (int) i; |
| |
| return -1; |
| } |
| |
| static int num_leap_years(int year) |
| { |
| return year / 4 - year / 100 + year / 400; |
| } |
| |
| /* Parse UTC date-time string, and return the corresponding time_t value. */ |
| static time_t parse_date_string(const char *datetime) |
| { |
| static const unsigned short days_before_month[] = { |
| 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 |
| }; |
| char month_str[32]={0}; |
| int second, minute, hour, day, month, year, leap_days, days; |
| time_t result = (time_t) 0; |
| |
| if ((sscanf(datetime, "%d/%3s/%d %d:%d:%d", |
| &day, month_str, &year, &hour, &minute, &second) == 6) || |
| (sscanf(datetime, "%d %3s %d %d:%d:%d", |
| &day, month_str, &year, &hour, &minute, &second) == 6) || |
| (sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d", |
| &day, month_str, &year, &hour, &minute, &second) == 6) || |
| (sscanf(datetime, "%d-%3s-%d %d:%d:%d", |
| &day, month_str, &year, &hour, &minute, &second) == 6)) { |
| |
| month = get_month_index(month_str); |
| if ((month >= 0) && (year > 1970)) { |
| leap_days = num_leap_years(year) - num_leap_years(1970); |
| year -= 1970; |
| days = year * 365 + days_before_month[month] + (day - 1) + leap_days; |
| result = (time_t) days * 24 * 3600 + (time_t) hour * 3600 + |
| minute * 60 + second; |
| } |
| } |
| |
| return result; |
| } |
| |
| /* Protect against directory disclosure attack by removing '..', |
| excessive '/' and '\' characters */ |
| static void remove_double_dots_and_double_slashes(char *s) |
| { |
| char *p = s; |
| |
| while (*s != '\0') { |
| *p++ = *s++; |
| if (s[-1] == '/' || s[-1] == '\\') { |
| /* Skip all following slashes, backslashes and double-dots */ |
| while (s[0] != '\0') { |
| if (s[0] == '/' || s[0] == '\\') { |
| s++; |
| } else if (s[0] == '.' && s[1] == '.') { |
| s += 2; |
| } else { |
| break; |
| } |
| } |
| } |
| } |
| *p = '\0'; |
| } |
| |
| static const struct { |
| const char *extension; |
| size_t ext_len; |
| const char *mime_type; |
| } builtin_mime_types[] = { |
| /* IANA registered MIME types (http://www.iana.org/assignments/media-types) |
| application types */ |
| {".doc", 4, "application/msword"}, |
| {".eps", 4, "application/postscript"}, |
| {".exe", 4, "application/octet-stream"}, |
| {".js", 3, "application/javascript"}, |
| {".json", 5, "application/json"}, |
| {".pdf", 4, "application/pdf"}, |
| {".ps", 3, "application/postscript"}, |
| {".rtf", 4, "application/rtf"}, |
| {".xhtml", 6, "application/xhtml+xml"}, |
| {".xsl", 4, "application/xml"}, |
| {".xslt", 5, "application/xml"}, |
| |
| /* audio */ |
| {".mp3", 4, "audio/mpeg"}, |
| {".oga", 4, "audio/ogg"}, |
| {".ogg", 4, "audio/ogg"}, |
| |
| /* image */ |
| {".gif", 4, "image/gif"}, |
| {".ief", 4, "image/ief"}, |
| {".jpeg", 5, "image/jpeg"}, |
| {".jpg", 4, "image/jpeg"}, |
| {".jpm", 4, "image/jpm"}, |
| {".jpx", 4, "image/jpx"}, |
| {".png", 4, "image/png"}, |
| {".svg", 4, "image/svg+xml"}, |
| {".tif", 4, "image/tiff"}, |
| {".tiff", 5, "image/tiff"}, |
| |
| /* model */ |
| {".wrl", 4, "model/vrml"}, |
| |
| /* text */ |
| {".css", 4, "text/css"}, |
| {".csv", 4, "text/csv"}, |
| {".htm", 4, "text/html"}, |
| {".html", 5, "text/html"}, |
| {".sgm", 4, "text/sgml"}, |
| {".shtm", 5, "text/html"}, |
| {".shtml", 6, "text/html"}, |
| {".txt", 4, "text/plain"}, |
| {".xml", 4, "text/xml"}, |
| |
| /* video */ |
| {".mov", 4, "video/quicktime"}, |
| {".mp4", 4, "video/mp4"}, |
| {".mpeg", 5, "video/mpeg"}, |
| {".mpg", 4, "video/mpeg"}, |
| {".ogv", 4, "video/ogg"}, |
| {".qt", 3, "video/quicktime"}, |
| |
| /* not registered types |
| (http://reference.sitepoint.com/html/mime-types-full, |
| http://www.hansenb.pdx.edu/DMKB/dict/tutorials/mime_typ.php, ..) */ |
| {".arj", 4, "application/x-arj-compressed"}, |
| {".gz", 3, "application/x-gunzip"}, |
| {".rar", 4, "application/x-arj-compressed"}, |
| {".swf", 4, "application/x-shockwave-flash"}, |
| {".tar", 4, "application/x-tar"}, |
| {".tgz", 4, "application/x-tar-gz"}, |
| {".torrent", 8, "application/x-bittorrent"}, |
| {".ppt", 4, "application/x-mspowerpoint"}, |
| {".xls", 4, "application/x-msexcel"}, |
| {".zip", 4, "application/x-zip-compressed"}, |
| {".aac", 4, "audio/aac"}, /* http://en.wikipedia.org/wiki/Advanced_Audio_Coding */ |
| {".aif", 4, "audio/x-aif"}, |
| {".m3u", 4, "audio/x-mpegurl"}, |
| {".mid", 4, "audio/x-midi"}, |
| {".ra", 3, "audio/x-pn-realaudio"}, |
| {".ram", 4, "audio/x-pn-realaudio"}, |
| {".wav", 4, "audio/x-wav"}, |
| {".bmp", 4, "image/bmp"}, |
| {".ico", 4, "image/x-icon"}, |
| {".pct", 4, "image/x-pct"}, |
| {".pict", 5, "image/pict"}, |
| {".rgb", 4, "image/x-rgb"}, |
| {".webm", 5, "video/webm"}, /* http://en.wikipedia.org/wiki/WebM */ |
| {".asf", 4, "video/x-ms-asf"}, |
| {".avi", 4, "video/x-msvideo"}, |
| {".m4v", 4, "video/x-m4v"}, |
| {NULL, 0, NULL} |
| }; |
| |
| const char *mg_get_builtin_mime_type(const char *path) |
| { |
| const char *ext; |
| size_t i, path_len; |
| |
| path_len = strlen(path); |
| |
| for (i = 0; builtin_mime_types[i].extension != NULL; i++) { |
| ext = path + (path_len - builtin_mime_types[i].ext_len); |
| if (path_len > builtin_mime_types[i].ext_len && |
| mg_strcasecmp(ext, builtin_mime_types[i].extension) == 0) { |
| return builtin_mime_types[i].mime_type; |
| } |
| } |
| |
| return "text/plain"; |
| } |
| |
| /* Look at the "path" extension and figure what mime type it has. |
| Store mime type in the vector. */ |
| static void get_mime_type(struct mg_context *ctx, const char *path, |
| struct vec *vec) |
| { |
| struct vec ext_vec, mime_vec; |
| const char *list, *ext; |
| size_t path_len; |
| |
| path_len = strlen(path); |
| |
| /* Scan user-defined mime types first, in case user wants to |
| override default mime types. */ |
| list = ctx->config[EXTRA_MIME_TYPES]; |
| while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) { |
| /* ext now points to the path suffix */ |
| ext = path + path_len - ext_vec.len; |
| if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) { |
| *vec = mime_vec; |
| return; |
| } |
| } |
| |
| vec->ptr = mg_get_builtin_mime_type(path); |
| vec->len = strlen(vec->ptr); |
| } |
| |
| /* Stringify binary data. Output buffer must be twice as big as input, |
| because each byte takes 2 bytes in string representation */ |
| static void bin2str(char *to, const unsigned char *p, size_t len) |
| { |
| static const char *hex = "0123456789abcdef"; |
| |
| for (; len--; p++) { |
| *to++ = hex[p[0] >> 4]; |
| *to++ = hex[p[0] & 0x0f]; |
| } |
| *to = '\0'; |
| } |
| |
| /* Return stringified MD5 hash for list of strings. Buffer must be 33 bytes. */ |
| char *mg_md5(char buf[33], ...) |
| { |
| md5_byte_t hash[16]; |
| const char *p; |
| va_list ap; |
| md5_state_t ctx; |
| |
| md5_init(&ctx); |
| |
| va_start(ap, buf); |
| while ((p = va_arg(ap, const char *)) != NULL) { |
| md5_append(&ctx, (const md5_byte_t *) p, (int) strlen(p)); |
| } |
| va_end(ap); |
| |
| md5_finish(&ctx, hash); |
| bin2str(buf, hash, sizeof(hash)); |
| return buf; |
| } |
| |
| /* Check the user's password, return 1 if OK */ |
| static int check_password(const char *method, const char *ha1, const char *uri, |
| const char *nonce, const char *nc, const char *cnonce, |
| const char *qop, const char *response) |
| { |
| char ha2[32 + 1], expected_response[32 + 1]; |
| |
| /* Some of the parameters may be NULL */ |
| if (method == NULL || nonce == NULL || nc == NULL || cnonce == NULL || |
| qop == NULL || response == NULL) { |
| return 0; |
| } |
| |
| /* NOTE(lsm): due to a bug in MSIE, we do not compare the URI */ |
| /* TODO(lsm): check for authentication timeout */ |
| if (/* strcmp(dig->uri, c->ouri) != 0 || */ |
| strlen(response) != 32 |
| /* || now - strtoul(dig->nonce, NULL, 10) > 3600 */ |
| ) { |
| return 0; |
| } |
| |
| mg_md5(ha2, method, ":", uri, NULL); |
| mg_md5(expected_response, ha1, ":", nonce, ":", nc, |
| ":", cnonce, ":", qop, ":", ha2, NULL); |
| |
| return mg_strcasecmp(response, expected_response) == 0; |
| } |
| |
| /* Use the global passwords file, if specified by auth_gpass option, |
| or search for .htpasswd in the requested directory. */ |
| static void open_auth_file(struct mg_connection *conn, const char *path, |
| struct file *filep) |
| { |
| char name[PATH_MAX]; |
| const char *p, *e, *gpass = conn->ctx->config[GLOBAL_PASSWORDS_FILE]; |
| struct file file = STRUCT_FILE_INITIALIZER; |
| |
| if (gpass != NULL) { |
| /* Use global passwords file */ |
| if (!mg_fopen(conn, gpass, "r", filep)) { |
| #ifdef DEBUG |
| mg_cry(conn, "fopen(%s): %s", gpass, strerror(ERRNO)); |
| #endif |
| } |
| /* Important: using local struct file to test path for is_directory |
| flag. |
| If filep is used, mg_stat() makes it appear as if auth file was |
| opened. */ |
| } else if (mg_stat(conn, path, &file) && file.is_directory) { |
| mg_snprintf(conn, name, sizeof(name), "%s%c%s", |
| path, '/', PASSWORDS_FILE_NAME); |
| if (!mg_fopen(conn, name, "r", filep)) { |
| #ifdef DEBUG |
| mg_cry(conn, "fopen(%s): %s", name, strerror(ERRNO)); |
| #endif |
| } |
| } else { |
| /* Try to find .htpasswd in requested directory. */ |
| for (p = path, e = p + strlen(p) - 1; e > p; e--) { |
| if (e[0] == '/') { |
| break; |
| } |
| } |
| mg_snprintf(conn, name, sizeof(name), "%.*s%c%s", |
| (int) (e - p), p, '/', PASSWORDS_FILE_NAME); |
| if (!mg_fopen(conn, name, "r", filep)) { |
| #ifdef DEBUG |
| mg_cry(conn, "fopen(%s): %s", name, strerror(ERRNO)); |
| #endif |
| } |
| } |
| } |
| |
| /* Parsed Authorization header */ |
| struct ah { |
| char *user, *uri, *cnonce, *response, *qop, *nc, *nonce; |
| }; |
| |
| /* Return 1 on success. Always initializes the ah structure. */ |
| static int parse_auth_header(struct mg_connection *conn, char *buf, |
| size_t buf_size, struct ah *ah) |
| { |
| char *name, *value, *s; |
| const char *auth_header; |
| unsigned long nonce; |
| |
| (void) memset(ah, 0, sizeof(*ah)); |
| if ((auth_header = mg_get_header(conn, "Authorization")) == NULL || |
| mg_strncasecmp(auth_header, "Digest ", 7) != 0) { |
| return 0; |
| } |
| |
| /* Make modifiable copy of the auth header */ |
| (void) mg_strlcpy(buf, auth_header + 7, buf_size); |
| s = buf; |
| |
| /* Parse authorization header */ |
| for (;;) { |
| /* Gobble initial spaces */ |
| while (isspace(* (unsigned char *) s)) { |
| s++; |
| } |
| name = skip_quoted(&s, "=", " ", 0); |
| /* Value is either quote-delimited, or ends at first comma or space. */ |
| if (s[0] == '\"') { |
| s++; |
| value = skip_quoted(&s, "\"", " ", '\\'); |
| if (s[0] == ',') { |
| s++; |
| } |
| } else { |
| value = skip_quoted(&s, ", ", " ", 0); /* IE uses commas, FF uses |
| spaces */ |
| } |
| if (*name == '\0') { |
| break; |
| } |
| |
| if (!strcmp(name, "username")) { |
| ah->user = value; |
| } else if (!strcmp(name, "cnonce")) { |
| ah->cnonce = value; |
| } else if (!strcmp(name, "response")) { |
| ah->response = value; |
| } else if (!strcmp(name, "uri")) { |
| ah->uri = value; |
| } else if (!strcmp(name, "qop")) { |
| ah->qop = value; |
| } else if (!strcmp(name, "nc")) { |
| ah->nc = value; |
| } else if (!strcmp(name, "nonce")) { |
| ah->nonce = value; |
| } |
| } |
| |
| #ifndef NO_NONCE_CHECK |
| /* Convert the nonce from the client to a number and check it. */ |
| /* Server side nonce check is valuable in all situations but one: if the server restarts frequently, |
| but the client should not see that, so the server should accept nonces from previous starts. */ |
| if (ah->nonce == NULL) { |
| return 0; |
| } |
| nonce = strtoul(ah->nonce, &s, 10); |
| if ((s == NULL) || (*s != 0)) { |
| return 0; |
| } |
| nonce ^= (unsigned long)(conn->ctx); |
| if (nonce<conn->ctx->start_time) { |
| /* nonce is from a previous start of the server and no longer valid (replay attack?) */ |
| return 0; |
| } |
| if (nonce>=conn->ctx->start_time+conn->ctx->nonce_count) { |
| return 0; |
| } |
| #endif |
| |
| /* CGI needs it as REMOTE_USER */ |
| if (ah->user != NULL) { |
| conn->request_info.remote_user = mg_strdup(ah->user); |
| } else { |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| static char *mg_fgets(char *buf, size_t size, struct file *filep, char **p) |
| { |
| char *eof; |
| size_t len; |
| char *memend; |
| |
| if (filep->membuf != NULL && *p != NULL) { |
| memend = (char *) &filep->membuf[filep->size]; |
| eof = (char *) memchr(*p, '\n', memend - *p); /* Search for \n from p till the end of stream */ |
| if (eof != NULL) { |
| eof += 1; /* Include \n */ |
| } else { |
| eof = memend; /* Copy remaining data */ |
| } |
| len = (size_t) (eof - *p) > size - 1 ? size - 1 : (size_t) (eof - *p); |
| memcpy(buf, *p, len); |
| buf[len] = '\0'; |
| *p += len; |
| return len ? eof : NULL; |
| } else if (filep->fp != NULL) { |
| return fgets(buf, (int)size, filep->fp); |
| } else { |
| return NULL; |
| } |
| } |
| |
| struct read_auth_file_struct { |
| struct mg_connection *conn; |
| struct ah ah; |
| char *domain; |
| char buf[256+256+40]; |
| char *f_user; |
| char *f_domain; |
| char *f_ha1; |
| }; |
| |
| static int read_auth_file(struct file *filep, struct read_auth_file_struct * workdata) |
| { |
| char *p; |
| int is_authorized = 0; |
| struct file fp; |
| size_t l; |
| |
| /* Loop over passwords file */ |
| p = (char *) filep->membuf; |
| while (mg_fgets(workdata->buf, sizeof(workdata->buf), filep, &p) != NULL) { |
| |
| l = strlen(workdata->buf); |
| while (l>0) { |
| if (isspace(workdata->buf[l-1]) || iscntrl(workdata->buf[l-1])) { |
| l--; |
| workdata->buf[l] = 0; |
| } else break; |
| } |
| if (l<1) continue; |
| |
| workdata->f_user = workdata->buf; |
| |
| if (workdata->f_user[0]==':') { |
| /* user names may not contain a ':' and may not be empty, |
| so lines starting with ':' may be used for a special purpose */ |
| if (workdata->f_user[1]=='#') { |
| /* :# is a comment */ |
| continue; |
| } else if (!strncmp(workdata->f_user+1,"include=",8)) { |
| if (mg_fopen(workdata->conn, workdata->f_user+9, "r", &fp)) { |
| is_authorized = read_auth_file(&fp, workdata); |
| mg_fclose(&fp); |
| } else { |
| mg_cry(workdata->conn, "%s: cannot open authorization file: %s", __func__, workdata->buf); |
| } |
| continue; |
| } |
| /* everything is invalid for the moment (might change in the future) */ |
| mg_cry(workdata->conn, "%s: syntax error in authorization file: %s", __func__, workdata->buf); |
| continue; |
| } |
| |
| workdata->f_domain = strchr(workdata->f_user, ':'); |
| if (workdata->f_domain == NULL) { |
| mg_cry(workdata->conn, "%s: syntax error in authorization file: %s", __func__, workdata->buf); |
| continue; |
| } |
| *(workdata->f_domain) = 0; |
| (workdata->f_domain)++; |
| |
| workdata->f_ha1 = strchr(workdata->f_domain, ':'); |
| if (workdata->f_ha1 == NULL) { |
| mg_cry(workdata->conn, "%s: syntax error in authorization file: %s", __func__, workdata->buf); |
| continue; |
| } |
| *(workdata->f_ha1) = 0; |
| (workdata->f_ha1)++; |
| |
| if (!strcmp(workdata->ah.user, workdata->f_user) && !strcmp(workdata->domain, workdata->f_domain)) { |
| return check_password(workdata->conn->request_info.request_method, workdata->f_ha1, workdata->ah.uri, |
| workdata->ah.nonce, workdata->ah.nc, workdata->ah.cnonce, workdata->ah.qop, workdata->ah.response); |
| } |
| } |
| |
| return is_authorized; |
| } |
| |
| /* Authorize against the opened passwords file. Return 1 if authorized. */ |
| static int authorize(struct mg_connection *conn, struct file *filep) |
| { |
| struct read_auth_file_struct workdata; |
| char buf[MG_BUF_LEN]; |
| |
| memset(&workdata,0,sizeof(workdata)); |
| workdata.conn = conn; |
| |
| if (!parse_auth_header(conn, buf, sizeof(buf), &workdata.ah)) { |
| return 0; |
| } |
| workdata.domain = conn->ctx->config[AUTHENTICATION_DOMAIN]; |
| |
| return read_auth_file(filep, &workdata); |
| } |
| |
| /* Return 1 if request is authorised, 0 otherwise. */ |
| static int check_authorization(struct mg_connection *conn, const char *path) |
| { |
| char fname[PATH_MAX]; |
| struct vec uri_vec, filename_vec; |
| const char *list; |
| struct file file = STRUCT_FILE_INITIALIZER; |
| int authorized = 1; |
| |
| list = conn->ctx->config[PROTECT_URI]; |
| while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) { |
| if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) { |
| mg_snprintf(conn, fname, sizeof(fname), "%.*s", |
| (int) filename_vec.len, filename_vec.ptr); |
| if (!mg_fopen(conn, fname, "r", &file)) { |
| mg_cry(conn, "%s: cannot open %s: %s", __func__, fname, strerror(errno)); |
| } |
| break; |
| } |
| } |
| |
| if (!is_file_opened(&file)) { |
| open_auth_file(conn, path, &file); |
| } |
| |
| if (is_file_opened(&file)) { |
| authorized = authorize(conn, &file); |
| mg_fclose(&file); |
| } |
| |
| return authorized; |
| } |
| |
| static void send_authorization_request(struct mg_connection *conn) |
| { |
| char date[64]; |
| time_t curtime = time(NULL); |
| unsigned long nonce = (unsigned long)(conn->ctx->start_time); |
| |
| (void)pthread_mutex_lock(&conn->ctx->nonce_mutex); |
| nonce += conn->ctx->nonce_count; |
| ++conn->ctx->nonce_count; |
| (void)pthread_mutex_unlock(&conn->ctx->nonce_mutex); |
| |
| nonce ^= (unsigned long)(conn->ctx); |
| conn->status_code = 401; |
| conn->must_close = 1; |
| |
| gmt_time_string(date, sizeof(date), &curtime); |
| |
| mg_printf(conn, |
| "HTTP/1.1 401 Unauthorized\r\n" |
| "Date: %s\r\n" |
| "Connection: %s\r\n" |
| "Content-Length: 0\r\n" |
| "WWW-Authenticate: Digest qop=\"auth\", realm=\"%s\", nonce=\"%lu\"\r\n\r\n", |
| date, suggest_connection_header(conn), |
| conn->ctx->config[AUTHENTICATION_DOMAIN], |
| nonce); |
| } |
| |
| static int is_authorized_for_put(struct mg_connection *conn) |
| { |
| struct file file = STRUCT_FILE_INITIALIZER; |
| const char *passfile = conn->ctx->config[PUT_DELETE_PASSWORDS_FILE]; |
| int ret = 0; |
| |
| if (passfile != NULL && mg_fopen(conn, passfile, "r", &file)) { |
| ret = authorize(conn, &file); |
| mg_fclose(&file); |
| } |
| |
| return ret; |
| } |
| |
| int mg_modify_passwords_file(const char *fname, const char *domain, |
| const char *user, const char *pass) |
| { |
| int found, i; |
| char line[512], u[512] = "", d[512] ="", ha1[33], tmp[PATH_MAX+8]; |
| FILE *fp, *fp2; |
| |
| found = 0; |
| fp = fp2 = NULL; |
| |
| /* Regard empty password as no password - remove user record. */ |
| if (pass != NULL && pass[0] == '\0') { |
| pass = NULL; |
| } |
| |
| /* Other arguments must not be empty */ |
| if (fname == NULL || domain == NULL || user == NULL) return 0; |
| |
| /* Using the given file format, user name and domain must not contain ':' */ |
| if (strchr(user, ':') != NULL) return 0; |
| if (strchr(domain, ':') != NULL) return 0; |
| |
| /* Do not allow control characters like newline in user name and domain. |
| Do not allow excessively long names either. */ |
| for (i=0; i<255 && user[i]!=0; i++) { |
| if (iscntrl(user[i])) return 0; |
| } |
| if (user[i]) return 0; |
| for (i=0; i<255 && domain[i]!=0; i++) { |
| if (iscntrl(domain[i])) return 0; |
| } |
| if (domain[i]) return 0; |
| |
| /* Create a temporary file name */ |
| (void) snprintf(tmp, sizeof(tmp) - 1, "%s.tmp", fname); |
| tmp[sizeof(tmp) - 1] = 0; |
| |
| /* Create the file if does not exist */ |
| if ((fp = fopen(fname, "a+")) != NULL) { |
| (void) fclose(fp); |
| } |
| |
| /* Open the given file and temporary file */ |
| if ((fp = fopen(fname, "r")) == NULL) { |
| return 0; |
| } else if ((fp2 = fopen(tmp, "w+")) == NULL) { |
| fclose(fp); |
| return 0; |
| } |
| |
| /* Copy the stuff to temporary file */ |
| while (fgets(line, sizeof(line), fp) != NULL) { |
| if (sscanf(line, "%255[^:]:%255[^:]:%*s", u, d) != 2) { |
| continue; |
| } |
| u[255]=0; |
| d[255]=0; |
| |
| if (!strcmp(u, user) && !strcmp(d, domain)) { |
| found++; |
| if (pass != NULL) { |
| mg_md5(ha1, user, ":", domain, ":", pass, NULL); |
| fprintf(fp2, "%s:%s:%s\n", user, domain, ha1); |
| } |
| } else { |
| fprintf(fp2, "%s", line); |
| } |
| } |
| |
| /* If new user, just add it */ |
| if (!found && pass != NULL) { |
| mg_md5(ha1, user, ":", domain, ":", pass, NULL); |
| fprintf(fp2, "%s:%s:%s\n", user, domain, ha1); |
| } |
| |
| /* Close files */ |
| fclose(fp); |
| fclose(fp2); |
| |
| /* Put the temp file in place of real file */ |
| IGNORE_UNUSED_RESULT(remove(fname)); |
| IGNORE_UNUSED_RESULT(rename(tmp, fname)); |
| |
| return 1; |
| } |
| |
| static SOCKET conn2(struct mg_context *ctx /* may be null */, const char *host, int port, |
| int use_ssl, char *ebuf, size_t ebuf_len) |
| { |
| struct sockaddr_in sain; |
| struct hostent *he; |
| SOCKET sock = INVALID_SOCKET; |
| |
| if (host == NULL) { |
| snprintf(ebuf, ebuf_len, "%s", "NULL host"); |
| } else if (use_ssl && SSLv23_client_method == NULL) { |
| snprintf(ebuf, ebuf_len, "%s", "SSL is not initialized"); |
| /* TODO(lsm): use something threadsafe instead of gethostbyname() */ |
| } else if ((he = gethostbyname(host)) == NULL) { |
| snprintf(ebuf, ebuf_len, "gethostbyname(%s): %s", host, strerror(ERRNO)); |
| } else if ((sock = socket(PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) { |
| snprintf(ebuf, ebuf_len, "socket(): %s", strerror(ERRNO)); |
| } else { |
| set_close_on_exec(sock, fc(ctx)); |
| memset(&sain, '\0', sizeof(sain)); |
| sain.sin_family = AF_INET; |
| sain.sin_port = htons((uint16_t) port); |
| sain.sin_addr = * (struct in_addr *) he->h_addr_list[0]; |
| if (connect(sock, (struct sockaddr *) &sain, sizeof(sain)) != 0) { |
| snprintf(ebuf, ebuf_len, "connect(%s:%d): %s", |
| host, port, strerror(ERRNO)); |
| closesocket(sock); |
| sock = INVALID_SOCKET; |
| } |
| } |
| return sock; |
| } |
| |
| int mg_url_encode(const char *src, char *dst, size_t dst_len) |
| { |
| static const char *dont_escape = "._-$,;~()"; |
| static const char *hex = "0123456789abcdef"; |
| char *pos = dst; |
| const char *end = dst + dst_len - 1; |
| |
| for (; *src != '\0' && pos < end; src++, pos++) { |
| if (isalnum(*(const unsigned char *) src) || |
| strchr(dont_escape, * (const unsigned char *) src) != NULL) { |
| *pos = *src; |
| } else if (pos + 2 < end) { |
| pos[0] = '%'; |
| pos[1] = hex[(* (const unsigned char *) src) >> 4]; |
| pos[2] = hex[(* (const unsigned char *) src) & 0xf]; |
| pos += 2; |
| } else { |
| return -1; |
| } |
| } |
| |
| *pos = '\0'; |
| return (*src == '\0') ? (int)(pos - dst) : -1; |
| } |
| |
| static void print_dir_entry(struct de *de) |
| { |
| char size[64], mod[64], href[PATH_MAX]; |
| struct tm *tm; |
| |
| if (de->file.is_directory) { |
| mg_snprintf(de->conn, size, sizeof(size), "%s", "[DIRECTORY]"); |
| } else { |
| /* We use (signed) cast below because MSVC 6 compiler cannot |
| convert unsigned __int64 to double. Sigh. */ |
| if (de->file.size < 1024) { |
| mg_snprintf(de->conn, size, sizeof(size), "%d", (int) de->file.size); |
| } else if (de->file.size < 0x100000) { |
| mg_snprintf(de->conn, size, sizeof(size), |
| "%.1fk", (double) de->file.size / 1024.0); |
| } else if (de->file.size < 0x40000000) { |
| mg_snprintf(de->conn, size, sizeof(size), |
| "%.1fM", (double) de->file.size / 1048576); |
| } else { |
| mg_snprintf(de->conn, size, sizeof(size), |
| "%.1fG", (double) de->file.size / 1073741824); |
| } |
| } |
| tm = localtime(&de->file.modification_time); |
| if (tm != NULL) { |
| strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", tm); |
| } else { |
| mg_strlcpy(mod, "01-Jan-1970 00:00", sizeof(mod)); |
| mod[sizeof(mod) - 1] = '\0'; |
| } |
| mg_url_encode(de->file_name, href, sizeof(href)); |
| de->conn->num_bytes_sent += mg_printf(de->conn, |
| "<tr><td><a href=\"%s%s%s\">%s%s</a></td>" |
| "<td> %s</td><td> %s</td></tr>\n", |
| de->conn->request_info.uri, href, de->file.is_directory ? "/" : "", |
| de->file_name, de->file.is_directory ? "/" : "", mod, size); |
| } |
| |
| /* This function is called from send_directory() and used for |
| sorting directory entries by size, or name, or modification time. |
| On windows, __cdecl specification is needed in case if project is built |
| with __stdcall convention. qsort always requires __cdels callback. */ |
| static int WINCDECL compare_dir_entries(const void *p1, const void *p2) |
| { |
| const struct de *a = (const struct de *) p1, *b = (const struct de *) p2; |
| const char *query_string = a->conn->request_info.query_string; |
| int cmp_result = 0; |
| |
| if (query_string == NULL) { |
| query_string = "na"; |
| } |
| |
| if (a->file.is_directory && !b->file.is_directory) { |
| return -1; /* Always put directories on top */ |
| } else if (!a->file.is_directory && b->file.is_directory) { |
| return 1; /* Always put directories on top */ |
| } else if (*query_string == 'n') { |
| cmp_result = strcmp(a->file_name, b->file_name); |
| } else if (*query_string == 's') { |
| cmp_result = a->file.size == b->file.size ? 0 : |
| a->file.size > b->file.size ? 1 : -1; |
| } else if (*query_string == 'd') { |
| cmp_result = a->file.modification_time == b->file.modification_time ? 0 : |
| a->file.modification_time > b->file.modification_time ? 1 : -1; |
| } |
| |
| return query_string[1] == 'd' ? -cmp_result : cmp_result; |
| } |
| |
| static int must_hide_file(struct mg_connection *conn, const char *path) |
| { |
| const char *pw_pattern = "**" PASSWORDS_FILE_NAME "$"; |
| const char *pattern = conn->ctx->config[HIDE_FILES]; |
| return match_prefix(pw_pattern, (int)strlen(pw_pattern), path) > 0 || |
| (pattern != NULL && match_prefix(pattern, (int)strlen(pattern), path) > 0); |
| } |
| |
| static int scan_directory(struct mg_connection *conn, const char *dir, |
| void *data, void (*cb)(struct de *, void *)) |
| { |
| char path[PATH_MAX]; |
| struct dirent *dp; |
| DIR *dirp; |
| struct de de; |
| |
| if ((dirp = opendir(dir)) == NULL) { |
| return 0; |
| } else { |
| de.conn = conn; |
| |
| while ((dp = readdir(dirp)) != NULL) { |
| /* Do not show current dir and hidden files */ |
| if (!strcmp(dp->d_name, ".") || |
| !strcmp(dp->d_name, "..") || |
| must_hide_file(conn, dp->d_name)) { |
| continue; |
| } |
| |
| mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, '/', dp->d_name); |
| |
| /* If we don't memset stat structure to zero, mtime will have |
| garbage and strftime() will segfault later on in |
| print_dir_entry(). memset is required only if mg_stat() |
| fails. For more details, see |
| http://code.google.com/p/mongoose/issues/detail?id=79 */ |
| memset(&de.file, 0, sizeof(de.file)); |
| if (!mg_stat(conn, path, &de.file)) { |
| mg_cry(conn, "%s: mg_stat(%s) failed: %s", |
| __func__, path, strerror(ERRNO)); |
| } |
| |
| de.file_name = dp->d_name; |
| cb(&de, data); |
| } |
| (void) closedir(dirp); |
| } |
| return 1; |
| } |
| |
| static int remove_directory(struct mg_connection *conn, const char *dir) |
| { |
| char path[PATH_MAX]; |
| struct dirent *dp; |
| DIR *dirp; |
| struct de de; |
| |
| if ((dirp = opendir(dir)) == NULL) { |
| return 0; |
| } else { |
| de.conn = conn; |
| |
| while ((dp = readdir(dirp)) != NULL) { |
| /* Do not show current dir (but show hidden files as they will |
| also be removed) */ |
| if (!strcmp(dp->d_name, ".") || |
| !strcmp(dp->d_name, "..")) { |
| continue; |
| } |
| |
| mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, '/', dp->d_name); |
| |
| /* If we don't memset stat structure to zero, mtime will have |
| garbage and strftime() will segfault later on in |
| print_dir_entry(). memset is required only if mg_stat() |
| fails. For more details, see |
| http://code.google.com/p/mongoose/issues/detail?id=79 */ |
| memset(&de.file, 0, sizeof(de.file)); |
| if (!mg_stat(conn, path, &de.file)) { |
| mg_cry(conn, "%s: mg_stat(%s) failed: %s", |
| __func__, path, strerror(ERRNO)); |
| } |
| if(de.file.modification_time) { |
| if(de.file.is_directory) { |
| remove_directory(conn, path); |
| } else { |
| (void) mg_remove(path); |
| } |
| } |
| |
| } |
| (void) closedir(dirp); |
| |
| IGNORE_UNUSED_RESULT(rmdir(dir)); |
| } |
| |
| return 1; |
| } |
| |
| struct dir_scan_data { |
| struct de *entries; |
| int num_entries; |
| int arr_size; |
| }; |
| |
| /* Behaves like realloc(), but frees original pointer on failure */ |
| static void *realloc2(void *ptr, size_t size) |
| { |
| void *new_ptr = mg_realloc(ptr, size); |
| if (new_ptr == NULL) { |
| mg_free(ptr); |
| } |
| return new_ptr; |
| } |
| |
| static void dir_scan_callback(struct de *de, void *data) |
| { |
| struct dir_scan_data *dsd = (struct dir_scan_data *) data; |
| |
| if (dsd->entries == NULL || dsd->num_entries >= dsd->arr_size) { |
| dsd->arr_size *= 2; |
| dsd->entries = (struct de *) realloc2(dsd->entries, dsd->arr_size * |
| sizeof(dsd->entries[0])); |
| } |
| if (dsd->entries == NULL) { |
| /* TODO(lsm): propagate an error to the caller */ |
| dsd->num_entries = 0; |
| } else { |
| dsd->entries[dsd->num_entries].file_name = mg_strdup(de->file_name); |
| dsd->entries[dsd->num_entries].file = de->file; |
| dsd->entries[dsd->num_entries].conn = de->conn; |
| dsd->num_entries++; |
| } |
| } |
| |
| static void handle_directory_request(struct mg_connection *conn, |
| const char *dir) |
| { |
| int i, sort_direction; |
| struct dir_scan_data data = { NULL, 0, 128 }; |
| char date[64]; |
| time_t curtime = time(NULL); |
| |
| if (!scan_directory(conn, dir, &data, dir_scan_callback)) { |
| send_http_error(conn, 500, NULL, |
| "Error: Cannot open directory\nopendir(%s): %s", |
| dir, strerror(ERRNO)); |
| return; |
| } |
| |
| gmt_time_string(date, sizeof(date), &curtime); |
| |
| sort_direction = conn->request_info.query_string != NULL && |
| conn->request_info.query_string[1] == 'd' ? 'a' : 'd'; |
| |
| conn->must_close = 1; |
| mg_printf(conn, "HTTP/1.1 200 OK\r\n" |
| "Date: %s\r\n" |
| "Connection: close\r\n" |
| "Content-Type: text/html; charset=utf-8\r\n\r\n", |
| date); |
| |
| conn->num_bytes_sent += mg_printf(conn, |
| "<html><head><title>Index of %s</title>" |
| "<style>th {text-align: left;}</style></head>" |
| "<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">" |
| "<tr><th><a href=\"?n%c\">Name</a></th>" |
| "<th><a href=\"?d%c\">Modified</a></th>" |
| "<th><a href=\"?s%c\">Size</a></th></tr>" |
| "<tr><td colspan=\"3\"><hr></td></tr>", |
| conn->request_info.uri, conn->request_info.uri, |
| sort_direction, sort_direction, sort_direction); |
| |
| /* Print first entry - link to a parent directory */ |
| conn->num_bytes_sent += mg_printf(conn, |
| "<tr><td><a href=\"%s%s\">%s</a></td>" |
| "<td> %s</td><td> %s</td></tr>\n", |
| conn->request_info.uri, "..", "Parent directory", "-", "-"); |
| |
| /* Sort and print directory entries */ |
| if (data.entries != NULL) { |
| qsort(data.entries, (size_t) data.num_entries, |
| sizeof(data.entries[0]), compare_dir_entries); |
| for (i = 0; i < data.num_entries; i++) { |
| print_dir_entry(&data.entries[i]); |
| mg_free(data.entries[i].file_name); |
| } |
| mg_free(data.entries); |
| } |
| |
| conn->num_bytes_sent += mg_printf(conn, "%s", "</table></body></html>"); |
| conn->status_code = 200; |
| } |
| |
| /* Send len bytes from the opened file to the client. */ |
| static void send_file_data(struct mg_connection *conn, struct file *filep, |
| int64_t offset, int64_t len) |
| { |
| char buf[MG_BUF_LEN]; |
| int to_read, num_read, num_written; |
| |
| /* Sanity check the offset */ |
| offset = offset < 0 ? 0 : offset > filep->size ? filep->size : offset; |
| |
| if (len > 0 && filep->membuf != NULL && filep->size > 0) { |
| if (len > filep->size - offset) { |
| len = filep->size - offset; |
| } |
| mg_write(conn, filep->membuf + offset, (size_t) len); |
| } else if (len > 0 && filep->fp != NULL) { |
| if (offset > 0 && fseeko(filep->fp, offset, SEEK_SET) != 0) { |
| mg_cry(conn, "%s: fseeko() failed: %s", |
| __func__, strerror(ERRNO)); |
| } |
| while (len > 0) { |
| /* Calculate how much to read from the file in the buffer */ |
| to_read = sizeof(buf); |
| if ((int64_t) to_read > len) { |
| to_read = (int) len; |
| } |
| |
| /* Read from file, exit the loop on error */ |
| if ((num_read = (int) fread(buf, 1, (size_t) to_read, filep->fp)) <= 0) { |
| break; |
| } |
| |
| /* Send read bytes to the client, exit the loop on error */ |
| if ((num_written = mg_write(conn, buf, (size_t) num_read)) != num_read) { |
| break; |
| } |
| |
| /* Both read and were successful, adjust counters */ |
| conn->num_bytes_sent += num_written; |
| len -= num_written; |
| } |
| } |
| } |
| |
| static int parse_range_header(const char *header, int64_t *a, int64_t *b) |
| { |
| return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b); |
| } |
| |
| static void construct_etag(char *buf, size_t buf_len, |
| const struct file *filep) |
| { |
| snprintf(buf, buf_len, "\"%lx.%" INT64_FMT "\"", |
| (unsigned long) filep->modification_time, filep->size); |
| } |
| |
| static void fclose_on_exec(struct file *filep, struct mg_connection *conn) |
| { |
| if (filep != NULL && filep->fp != NULL) { |
| #ifdef _WIN32 |
| (void) conn; /* Unused. */ |
| #else |
| if (fcntl(fileno(filep->fp), F_SETFD, FD_CLOEXEC) != 0) { |
| mg_cry(conn, "%s: fcntl(F_SETFD FD_CLOEXEC) failed: %s", |
| __func__, strerror(ERRNO)); |
| } |
| #endif |
| } |
| } |
| |
| static void handle_static_file_request(struct mg_connection *conn, const char *path, struct file *filep) |
| { |
| char date[64], lm[64], etag[64], range[64]; |
| const char *msg = "OK", *hdr; |
| time_t curtime = time(NULL); |
| int64_t cl, r1, r2; |
| struct vec mime_vec; |
| int n; |
| char gz_path[PATH_MAX]; |
| const char *encoding = ""; |
| const char *cors1, *cors2, *cors3; |
| |
| get_mime_type(conn->ctx, path, &mime_vec); |
| cl = filep->size; |
| conn->status_code = 200; |
| range[0] = '\0'; |
| |
| /* if this file is in fact a pre-gzipped file, rewrite its filename |
| it's important to rewrite the filename after resolving |
| the mime type from it, to preserve the actual file's type */ |
| if (filep->gzipped) { |
| snprintf(gz_path, sizeof(gz_path), "%s.gz", path); |
| path = gz_path; |
| encoding = "Content-Encoding: gzip\r\n"; |
| } |
| |
| if (!mg_fopen(conn, path, "rb", filep)) { |
| send_http_error(conn, 500, NULL, |
| "Error: Cannot open file\nfopen(%s): %s", |
| path, strerror(ERRNO)); |
| return; |
| } |
| |
| fclose_on_exec(filep, conn); |
| |
| /* If Range: header specified, act accordingly */ |
| r1 = r2 = 0; |
| hdr = mg_get_header(conn, "Range"); |
| if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0 && |
| r1 >= 0 && r2 >= 0) { |
| /* actually, range requests don't play well with a pre-gzipped |
| file (since the range is specified in the uncompressed space) */ |
| if (filep->gzipped) { |
| send_http_error(conn, 501, NULL, "%s", |
| "Error: Range requests in gzipped files are not supported"); |
| mg_fclose(filep); |
| return; |
| } |
| conn->status_code = 206; |
| cl = n == 2 ? (r2 > cl ? cl : r2) - r1 + 1: cl - r1; |
| mg_snprintf(conn, range, sizeof(range), |
| "Content-Range: bytes " |
| "%" INT64_FMT "-%" |
| INT64_FMT "/%" INT64_FMT "\r\n", |
| r1, r1 + cl - 1, filep->size); |
| msg = "Partial Content"; |
| } |
| |
| hdr = mg_get_header(conn, "Origin"); |
| if (hdr) { |
| /* Cross-origin resource sharing (CORS), see http://www.html5rocks.com/en/tutorials/cors/, |
| http://www.html5rocks.com/static/images/cors_server_flowchart.png - preflight is not supported for files. */ |
| cors1 = "Access-Control-Allow-Origin: "; |
| cors2 = conn->ctx->config[ACCESS_CONTROL_ALLOW_ORIGIN]; |
| cors3 = "\r\n"; |
| } else { |
| cors1 = cors2 = cors3 = ""; |
| } |
| |
| /* Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to |
| http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3 */ |
| gmt_time_string(date, sizeof(date), &curtime); |
| gmt_time_string(lm, sizeof(lm), &filep->modification_time); |
| construct_etag(etag, sizeof(etag), filep); |
| |
| (void) mg_printf(conn, |
| "HTTP/1.1 %d %s\r\n" |
| "%s%s%s" |
| "Date: %s\r\n" |
| "Last-Modified: %s\r\n" |
| "Etag: %s\r\n" |
| "Content-Type: %.*s\r\n" |
| "Content-Length: %" INT64_FMT "\r\n" |
| "Connection: %s\r\n" |
| "Accept-Ranges: bytes\r\n" |
| "%s%s\r\n", |
| conn->status_code, msg, |
| cors1, cors2, cors3, |
| date, lm, etag, (int) mime_vec.len, |
| mime_vec.ptr, cl, suggest_connection_header(conn), range, encoding); |
| |
| if (strcmp(conn->request_info.request_method, "HEAD") != 0) { |
| send_file_data(conn, filep, r1, cl); |
| } |
| mg_fclose(filep); |
| } |
| |
| void mg_send_file2(struct mg_connection *conn, const char *path, int timeout) |
| { |
| struct file file = STRUCT_FILE_INITIALIZER; |
| if (mg_stat(conn, path, &file)) { |
| if (file.is_directory) { |
| if (!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes")) { |
| handle_directory_request(conn, path); |
| } else { |
| send_http_error(conn, 403, NULL, "%s", |
| "Error: Directory listing denied"); |
| } |
| } else { |
| handle_static_file_request(conn, path, &file); |
| } |
| } else { |
| send_http_error(conn, 404, NULL, "%s", |
| "Error: File not found"); |
| } |
| } |
| |
| void mg_send_file(struct mg_connection *conn, const char *path) |
| { |
| mg_send_file2(conn, path, TIMEOUT_INFINITE); |
| } |
| |
| /* Parse HTTP headers from the given buffer, advance buffer to the point |
| where parsing stopped. */ |
| static void parse_http_headers(char **buf, struct mg_request_info *ri) |
| { |
| int i; |
| |
| for (i = 0; i < (int) ARRAY_SIZE(ri->http_headers); i++) { |
| ri->http_headers[i].name = skip_quoted(buf, ":", " ", 0); |
| ri->http_headers[i].value = skip(buf, "\r\n"); |
| if (ri->http_headers[i].name[0] == '\0') |
| break; |
| ri->num_headers = i + 1; |
| } |
| } |
| |
| static int is_valid_http_method(const char *method) |
| { |
| return !strcmp(method, "GET") || !strcmp(method, "POST") || |
| !strcmp(method, "HEAD") || !strcmp(method, "CONNECT") || |
| !strcmp(method, "PUT") || !strcmp(method, "DELETE") || |
| !strcmp(method, "OPTIONS") || !strcmp(method, "PROPFIND") |
| || !strcmp(method, "MKCOL") |
| ; |
| } |
| |
| /* Parse HTTP request, fill in mg_request_info structure. |
| This function modifies the buffer by NUL-terminating |
| HTTP request components, header names and header values. */ |
| static int parse_http_message(char *buf, int len, struct mg_request_info *ri) |
| { |
| int is_request, request_length = get_request_len(buf, len); |
| if (request_length > 0) { |
| /* Reset attributes. DO NOT TOUCH is_ssl, remote_ip, remote_addr, remote_port */ |
| ri->remote_user = ri->request_method = ri->uri = ri->http_version = NULL; |
| ri->num_headers = 0; |
| |
| buf[request_length - 1] = '\0'; |
| |
| /* RFC says that all initial whitespaces should be ingored */ |
| while (*buf != '\0' && isspace(* (unsigned char *) buf)) { |
| buf++; |
| } |
| ri->request_method = skip(&buf, " "); |
| ri->uri = skip(&buf, " "); |
| ri->http_version = skip(&buf, "\r\n"); |
| |
| /* HTTP message could be either HTTP request or HTTP response, e.g. |
| "GET / HTTP/1.0 ...." or "HTTP/1.0 200 OK ..." */ |
| is_request = is_valid_http_method(ri->request_method); |
| if ((is_request && memcmp(ri->http_version, "HTTP/", 5) != 0) || |
| (!is_request && memcmp(ri->request_method, "HTTP/", 5) != 0)) { |
| request_length = -1; |
| } else { |
| if (is_request) { |
| ri->http_version += 5; |
| } |
| parse_http_headers(&buf, ri); |
| } |
| } |
| return request_length; |
| } |
| |
| /* Keep reading the input (either opened file descriptor fd, or socket sock, |
| or SSL descriptor ssl) into buffer buf, until \r\n\r\n appears in the |
| buffer (which marks the end of HTTP request). Buffer buf may already |
| have some data. The length of the data is stored in nread. |
| Upon every read operation, increase nread by the number of bytes read. */ |
| static int read_request(FILE *fp, struct mg_connection *conn, |
| char *buf, int bufsiz, int *nread) |
| { |
| int request_len, n = 0; |
| time_t last_action_time = 0; |
| double request_timout = 0.0; |
| |
| if (conn->ctx->config[REQUEST_TIMEOUT]) { |
| /* value of request_timout is in seconds, config in milliseconds */ |
| request_timout = atof(conn->ctx->config[REQUEST_TIMEOUT]) / 1000.0; |
| } |
| |
| request_len = get_request_len(buf, *nread); |
| while (conn->ctx->stop_flag == 0 && |
| *nread < bufsiz && request_len == 0 && |
| difftime(last_action_time, conn->birth_time) <= request_timout && |
| (n = pull(fp, conn, buf + *nread, bufsiz - *nread)) > 0) { |
| *nread += n; |
| assert(*nread <= bufsiz); |
| request_len = get_request_len(buf, *nread); |
| last_action_time = (request_timout > 0.0) ? time(NULL) : 0; |
| } |
| |
| return request_len <= 0 && n <= 0 ? -1 : request_len; |
| } |
| |
| /* For given directory path, substitute it to valid index file. |
| Return 1 if index file has been found, 0 if not found. |
| If the file is found, it's stats is returned in stp. */ |
| static int substitute_index_file(struct mg_connection *conn, char *path, |
| size_t path_len, struct file *filep) |
| { |
| const char *list = conn->ctx->config[INDEX_FILES]; |
| struct file file = STRUCT_FILE_INITIALIZER; |
| struct vec filename_vec; |
| size_t n = strlen(path); |
| int found = 0; |
| |
| /* The 'path' given to us points to the directory. Remove all trailing |
| directory separator characters from the end of the path, and |
| then append single directory separator character. */ |
| while (n > 0 && path[n - 1] == '/') { |
| n--; |
| } |
| path[n] = '/'; |
| |
| /* Traverse index files list. For each entry, append it to the given |
| path and see if the file exists. If it exists, break the loop */ |
| while ((list = next_option(list, &filename_vec, NULL)) != NULL) { |
| |
| /* Ignore too long entries that may overflow path buffer */ |
| if (filename_vec.len > path_len - (n + 2)) |
| continue; |
| |
| /* Prepare full path to the index file */ |
| mg_strlcpy(path + n + 1, filename_vec.ptr, filename_vec.len + 1); |
| |
| /* Does it exist? */ |
| if (mg_stat(conn, path, &file)) { |
| /* Yes it does, break the loop */ |
| *filep = file; |
| found = 1; |
| break; |
| } |
| } |
| |
| /* If no index file exists, restore directory path */ |
| if (!found) { |
| path[n] = '\0'; |
| } |
| |
| return found; |
| } |
| |
| /* Return True if we should reply 304 Not Modified. */ |
| static int is_not_modified(const struct mg_connection *conn, |
| const struct file *filep) |
| { |
| char etag[64]; |
| const char *ims = mg_get_header(conn, "If-Modified-Since"); |
| const char *inm = mg_get_header(conn, "If-None-Match"); |
| construct_etag(etag, sizeof(etag), filep); |
| return (inm != NULL && !mg_strcasecmp(etag, inm)) || |
| (ims != NULL && filep->modification_time <= parse_date_string(ims)); |
| } |
| |
| static int forward_body_data(struct mg_connection *conn, FILE *fp, |
| SOCKET sock, SSL *ssl) |
| { |
| const char *expect, *body; |
| char buf[MG_BUF_LEN]; |
| int to_read, nread, success = 0; |
| int64_t buffered_len; |
| |
| expect = mg_get_header(conn, "Expect"); |
| assert(fp != NULL); |
| |
| if (conn->content_len == -1) { |
| /* Content length is not specified by the client. */ |
| send_http_error(conn, 411, NULL, "%s", |
| "Error: Client did not specify content length"); |
| } else if ((expect != NULL) && (mg_strcasecmp(expect, "100-continue") != 0)) { |
| /* Client sent an "Expect: xyz" header and xyz is not 100-continue. */ |
| send_http_error(conn, 417, NULL, |
| "Error: Can not fulfill expectation %s", expect); |
| } else { |
| if (expect != NULL) { |
| (void) mg_printf(conn, "%s", "HTTP/1.1 100 Continue\r\n\r\n"); |
| conn->status_code = 100; |
| } else { |
| conn->status_code = 200; |
| } |
| |
| buffered_len = (int64_t)(conn->data_len) - (int64_t)conn->request_len - conn->consumed_content; |
| assert(buffered_len >= 0); |
| assert(conn->consumed_content == 0); |
| |
| if (buffered_len > 0) { |
| if ((int64_t) buffered_len > conn->content_len) { |
| buffered_len = (int) conn->content_len; |
| } |
| body = conn->buf + conn->request_len + conn->consumed_content; |
| push(fp, sock, ssl, body, (int64_t) buffered_len); |
| conn->consumed_content += buffered_len; |
| } |
| |
| nread = 0; |
| while (conn->consumed_content < conn->content_len) { |
| to_read = sizeof(buf); |
| if ((int64_t) to_read > conn->content_len - conn->consumed_content) { |
| to_read = (int) (conn->content_len - conn->consumed_content); |
| } |
| nread = pull(NULL, conn, buf, to_read); |
| if (nread <= 0 || push(fp, sock, ssl, buf, nread) != nread) { |
| break; |
| } |
| conn->consumed_content += nread; |
| } |
| |
| if (conn->consumed_content == conn->content_len) { |
| success = nread >= 0; |
| } |
| |
| /* Each error code path in this function must send an error */ |
| if (!success) { |
| /* TODO: Maybe some data has already been sent. */ |
| send_http_error(conn, 500, NULL, "%s", ""); |
| } |
| } |
| |
| return success; |
| } |
| |
| #if !defined(NO_CGI) |
| /* This structure helps to create an environment for the spawned CGI program. |
| Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings, |
| last element must be NULL. |
| However, on Windows there is a requirement that all these VARIABLE=VALUE\0 |
| strings must reside in a contiguous buffer. The end of the buffer is |
| marked by two '\0' characters. |
| We satisfy both worlds: we create an envp array (which is vars), all |
| entries are actually pointers inside buf. */ |
| struct cgi_env_block { |
| struct mg_connection *conn; |
| char buf[CGI_ENVIRONMENT_SIZE]; /* Environment buffer */ |
| int len; /* Space taken */ |
| char *vars[MAX_CGI_ENVIR_VARS]; /* char **envp */ |
| int nvars; /* Number of variables */ |
| }; |
| |
| static char *addenv(struct cgi_env_block *block, |
| PRINTF_FORMAT_STRING(const char *fmt), ...) |
| PRINTF_ARGS(2, 3); |
| |
| /* Append VARIABLE=VALUE\0 string to the buffer, and add a respective |
| pointer into the vars array. */ |
| static char *addenv(struct cgi_env_block *block, const char *fmt, ...) |
| { |
| int n, space; |
| char *added; |
| va_list ap; |
| |
| /* Calculate how much space is left in the buffer */ |
| space = sizeof(block->buf) - block->len - 2; |
| assert(space >= 0); |
| |
| /* Make a pointer to the free space int the buffer */ |
| added = block->buf + block->len; |
| |
| /* Copy VARIABLE=VALUE\0 string into the free space */ |
| va_start(ap, fmt); |
| n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap); |
| va_end(ap); |
| |
| /* Make sure we do not overflow buffer and the envp array */ |
| if (n > 0 && n + 1 < space && |
| block->nvars < (int) ARRAY_SIZE(block->vars) - 2) { |
| /* Append a pointer to the added string into the envp array */ |
| block->vars[block->nvars++] = added; |
| /* Bump up used length counter. Include \0 terminator */ |
| block->len += n + 1; |
| } else { |
| mg_cry(block->conn, "%s: CGI env buffer truncated for [%s]", __func__, fmt); |
| } |
| |
| return added; |
| } |
| |
| static void prepare_cgi_environment(struct mg_connection *conn, |
| const char *prog, |
| struct cgi_env_block *blk) |
| { |
| const char *s, *slash; |
| struct vec var_vec; |
| char *p, src_addr[IP_ADDR_STR_LEN]; |
| int i; |
| |
| blk->len = blk->nvars = 0; |
| blk->conn = conn; |
| sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa); |
| |
| addenv(blk, "SERVER_NAME=%s", conn->ctx->config[AUTHENTICATION_DOMAIN]); |
| addenv(blk, "SERVER_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]); |
| addenv(blk, "DOCUMENT_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]); |
| addenv(blk, "SERVER_SOFTWARE=%s/%s", "Civetweb", mg_version()); |
| |
| /* Prepare the environment block */ |
| addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1"); |
| addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1"); |
| addenv(blk, "%s", "REDIRECT_STATUS=200"); /* For PHP */ |
| |
| /* TODO(lsm): fix this for IPv6 case */ |
| addenv(blk, "SERVER_PORT=%d", ntohs(conn->client.lsa.sin.sin_port)); |
| |
| addenv(blk, "REQUEST_METHOD=%s", conn->request_info.request_method); |
| addenv(blk, "REMOTE_ADDR=%s", src_addr); |
| addenv(blk, "REMOTE_PORT=%d", conn->request_info.remote_port); |
| addenv(blk, "REQUEST_URI=%s", conn->request_info.uri); |
| |
| /* SCRIPT_NAME */ |
| assert(conn->request_info.uri[0] == '/'); |
| slash = strrchr(conn->request_info.uri, '/'); |
| if ((s = strrchr(prog, '/')) == NULL) |
| s = prog; |
| addenv(blk, "SCRIPT_NAME=%.*s%s", (int) (slash - conn->request_info.uri), |
| conn->request_info.uri, s); |
| |
| addenv(blk, "SCRIPT_FILENAME=%s", prog); |
| addenv(blk, "PATH_TRANSLATED=%s", prog); |
| addenv(blk, "HTTPS=%s", conn->ssl == NULL ? "off" : "on"); |
| |
| if ((s = mg_get_header(conn, "Content-Type")) != NULL) |
| addenv(blk, "CONTENT_TYPE=%s", s); |
| |
| if (conn->request_info.query_string != NULL) |
| addenv(blk, "QUERY_STRING=%s", conn->request_info.query_string); |
| |
| if ((s = mg_get_header(conn, "Content-Length")) != NULL) |
| addenv(blk, "CONTENT_LENGTH=%s", s); |
| |
| if ((s = getenv("PATH")) != NULL) |
| addenv(blk, "PATH=%s", s); |
| |
| if (conn->path_info != NULL) { |
| addenv(blk, "PATH_INFO=%s", conn->path_info); |
| } |
| |
| if (conn->status_code > 0) { |
| /* CGI error handler should show the status code */ |
| addenv(blk, "STATUS=%d", conn->status_code); |
| } |
| |
| #if defined(_WIN32) |
| if ((s = getenv("COMSPEC")) != NULL) { |
| addenv(blk, "COMSPEC=%s", s); |
| } |
| if ((s = getenv("SYSTEMROOT")) != NULL) { |
| addenv(blk, "SYSTEMROOT=%s", s); |
| } |
| if ((s = getenv("SystemDrive")) != NULL) { |
| addenv(blk, "SystemDrive=%s", s); |
| } |
| if ((s = getenv("ProgramFiles")) != NULL) { |
| addenv(blk, "ProgramFiles=%s", s); |
| } |
| if ((s = getenv("ProgramFiles(x86)")) != NULL) { |
| addenv(blk, "ProgramFiles(x86)=%s", s); |
| } |
| #else |
| if ((s = getenv("LD_LIBRARY_PATH")) != NULL) |
| addenv(blk, "LD_LIBRARY_PATH=%s", s); |
| #endif /* _WIN32 */ |
| |
| if ((s = getenv("PERLLIB")) != NULL) |
| addenv(blk, "PERLLIB=%s", s); |
| |
| if (conn->request_info.remote_user != NULL) { |
| addenv(blk, "REMOTE_USER=%s", conn->request_info.remote_user); |
| addenv(blk, "%s", "AUTH_TYPE=Digest"); |
| } |
| |
| /* Add all headers as HTTP_* variables */ |
| for (i = 0; i < conn->request_info.num_headers; i++) { |
| p = addenv(blk, "HTTP_%s=%s", |
| conn->request_info.http_headers[i].name, |
| conn->request_info.http_headers[i].value); |
| |
| /* Convert variable name into uppercase, and change - to _ */ |
| for (; *p != '=' && *p != '\0'; p++) { |
| if (*p == '-') |
| *p = '_'; |
| *p = (char) toupper(* (unsigned char *) p); |
| } |
| } |
| |
| /* Add user-specified variables */ |
| s = conn->ctx->config[CGI_ENVIRONMENT]; |
| while ((s = next_option(s, &var_vec, NULL)) != NULL) { |
| addenv(blk, "%.*s", (int) var_vec.len, var_vec.ptr); |
| } |
| |
| blk->vars[blk->nvars++] = NULL; |
| blk->buf[blk->len++] = '\0'; |
| |
| assert(blk->nvars < (int) ARRAY_SIZE(blk->vars)); |
| assert(blk->len > 0); |
| assert(blk->len < (int) sizeof(blk->buf)); |
| } |
| |
| static void handle_cgi_request(struct mg_connection *conn, const char *prog) |
| { |
| char *buf; |
| size_t buflen; |
| int headers_len, data_len, i, fdin[2] = { 0, 0 }, fdout[2] = { 0, 0 }; |
| const char *status, *status_text, *connection_state; |
| char *pbuf, dir[PATH_MAX], *p; |
| struct mg_request_info ri; |
| struct cgi_env_block blk; |
| FILE *in = NULL, *out = NULL; |
| struct file fout = STRUCT_FILE_INITIALIZER; |
| pid_t pid = (pid_t) -1; |
| |
| buf = NULL; |
| buflen = 16384; |
| prepare_cgi_environment(conn, prog, &blk); |
| |
| /* CGI must be executed in its own directory. 'dir' must point to the |
| directory containing executable program, 'p' must point to the |
| executable program name relative to 'dir'. */ |
| (void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog); |
| if ((p = strrchr(dir, '/')) != NULL) { |
| *p++ = '\0'; |
| } else { |
| dir[0] = '.', dir[1] = '\0'; |
| p = (char *) prog; |
| } |
| |
| if (pipe(fdin) != 0 || pipe(fdout) != 0) { |
| send_http_error(conn, 500, NULL, |
| "Error: Cannot create CGI pipe: %s", strerror(ERRNO)); |
| goto done; |
| } |
| |
| pid = spawn_process(conn, p, blk.buf, blk.vars, fdin[0], fdout[1], dir); |
| if (pid == (pid_t) -1) { |
| send_http_error(conn, 500, NULL, |
| "Error: Cannot spawn CGI process [%s]: %s", prog, strerror(ERRNO)); |
| goto done; |
| } |
| |
| /* Make sure child closes all pipe descriptors. It must dup them to 0,1 */ |
| set_close_on_exec(fdin[0], conn); |
| set_close_on_exec(fdin[1], conn); |
| set_close_on_exec(fdout[0], conn); |
| set_close_on_exec(fdout[1], conn); |
| |
| /* Parent closes only one side of the pipes. |
| If we don't mark them as closed, close() attempt before |
| return from this function throws an exception on Windows. |
| Windows does not like when closed descriptor is closed again. */ |
| (void) close(fdin[0]); |
| (void) close(fdout[1]); |
| fdin[0] = fdout[1] = -1; |
| |
| if ((in = fdopen(fdin[1], "wb")) == NULL) { |
| send_http_error(conn, 500, NULL, |
| "Error: CGI can not open fdin\nfopen: %s", strerror(ERRNO)); |
| goto done; |
| } |
| if ((out = fdopen(fdout[0], "rb")) == NULL) { |
| send_http_error(conn, 500, NULL, |
| "Error: CGI can not open fdout\nfopen: %s", strerror(ERRNO)); |
| goto done; |
| } |
| |
| setbuf(in, NULL); |
| setbuf(out, NULL); |
| fout.fp = out; |
| |
| /* Send POST data to the CGI process if needed */ |
| if (!strcmp(conn->request_info.request_method, "POST") && |
| !forward_body_data(conn, in, INVALID_SOCKET, NULL)) { |
| goto done; |
| } |
| |
| /* Close so child gets an EOF. */ |
| fclose(in); |
| in = NULL; |
| fdin[1] = -1; |
| |
| /* Now read CGI reply into a buffer. We need to set correct |
| status code, thus we need to see all HTTP headers first. |
| Do not send anything back to client, until we buffer in all |
| HTTP headers. */ |
| data_len = 0; |
| buf = (char *)mg_malloc(buflen); |
| if (buf == NULL) { |
| send_http_error(conn, 500, NULL, |
| "Error: Not enough memory for CGI buffer (%u bytes)", |
| (unsigned int) buflen); |
| goto done; |
| } |
| headers_len = read_request(out, conn, buf, (int) buflen, &data_len); |
| if (headers_len <= 0) { |
| send_http_error(conn, 500, NULL, |
| "Error: CGI program sent malformed or too big (>%u bytes) HTTP headers: [%.*s]", |
| (unsigned) buflen, data_len, buf); |
| goto done; |
| } |
| pbuf = buf; |
| buf[headers_len - 1] = '\0'; |
| parse_http_headers(&pbuf, &ri); |
| |
| /* Make up and send the status line */ |
| status_text = "OK"; |
| if ((status = get_header(&ri, "Status")) != NULL) { |
| conn->status_code = atoi(status); |
| status_text = status; |
| while (isdigit(* (unsigned char *) status_text) || *status_text == ' ') { |
| status_text++; |
| } |
| } else if (get_header(&ri, "Location") != NULL) { |
| conn->status_code = 302; |
| } else { |
| conn->status_code = 200; |
| } |
| connection_state = get_header(&ri, "Connection"); |
| if (connection_state == NULL || |
| mg_strcasecmp(connection_state, "keep-alive")) { |
| conn->must_close = 1; |
| } |
| (void) mg_printf(conn, "HTTP/1.1 %d %s\r\n", conn->status_code, |
| status_text); |
| |
| /* Send headers */ |
| for (i = 0; i < ri.num_headers; i++) { |
| mg_printf(conn, "%s: %s\r\n", |
| ri.http_headers[i].name, ri.http_headers[i].value); |
| } |
| mg_write(conn, "\r\n", 2); |
| |
| /* Send chunk of data that may have been read after the headers */ |
| conn->num_bytes_sent += mg_write(conn, buf + headers_len, |
| (size_t)(data_len - headers_len)); |
| |
| /* Read the rest of CGI output and send to the client */ |
| send_file_data(conn, &fout, 0, INT64_MAX); |
| |
| done: |
| if (pid != (pid_t) -1) { |
| kill(pid, SIGKILL); |
| #if !defined(_WIN32) |
| { |
| int st; |
| while (waitpid(pid, &st, 0) != -1); /* clean zombies */ |
| } |
| #endif |
| } |
| if (fdin[0] != -1) { |
| close(fdin[0]); |
| } |
| if (fdout[1] != -1) { |
| close(fdout[1]); |
| } |
| |
| if (in != NULL) { |
| fclose(in); |
| } else if (fdin[1] != -1) { |
| close(fdin[1]); |
| } |
| |
| if (out != NULL) { |
| fclose(out); |
| } else if (fdout[0] != -1) { |
| close(fdout[0]); |
| } |
| if (buf != NULL) { |
| mg_free(buf); |
| } |
| } |
| #endif /* !NO_CGI */ |
| |
| /* For a given PUT path, create all intermediate subdirectories. |
| Return 0 if the path itself is a directory. |
| Return 1 if the path leads to a file. |
| Return -1 for if the path is too long. |
| Return -2 if path can not be created. |
| */ |
| static int put_dir(struct mg_connection *conn, const char *path) |
| { |
| char buf[PATH_MAX]; |
| const char *s, *p; |
| struct file file = STRUCT_FILE_INITIALIZER; |
| int len, res = 1; |
| |
| for (s = p = path + 2; (p = strchr(s, '/')) != NULL; s = ++p) { |
| len = (int)(p - path); |
| if (len >= (int) sizeof(buf)) { |
| /* path too long */ |
| res = -1; |
| break; |
| } |
| memcpy(buf, path, len); |
| buf[len] = '\0'; |
| |
| /* Try to create intermediate directory */ |
| DEBUG_TRACE("mkdir(%s)", buf); |
| if (!mg_stat(conn, buf, &file) && mg_mkdir(buf, 0755) != 0) { |
| /* path does not exixt and can not be created */ |
| res = -2; |
| break; |
| } |
| |
| /* Is path itself a directory? */ |
| if (p[1] == '\0') { |
| res = 0; |
| } |
| } |
| |
| return res; |
| } |
| |
| static void mkcol(struct mg_connection *conn, const char *path) |
| { |
| int rc, body_len; |
| struct de de; |
| char date[64]; |
| time_t curtime = time(NULL); |
| |
| /* TODO: Check the send_http_error situations in this function */ |
| |
| memset(&de.file, 0, sizeof(de.file)); |
| if (!mg_stat(conn, path, &de.file)) { |
| mg_cry(conn, "%s: mg_stat(%s) failed: %s", |
| __func__, path, strerror(ERRNO)); |
| } |
| |
| if (de.file.modification_time) { |
| send_http_error(conn, 405, NULL, |
| "Error: mkcol(%s): %s", path, strerror(ERRNO)); |
| return; |
| } |
| |
| body_len = conn->data_len - conn->request_len; |
| if (body_len > 0) { |
| send_http_error(conn, 415, NULL, |
| "Error: mkcol(%s): %s", path, strerror(ERRNO)); |
| return; |
| } |
| |
| rc = mg_mkdir(path, 0755); |
| |
| if (rc == 0) { |
| conn->status_code = 201; |
| gmt_time_string(date, sizeof(date), &curtime); |
| mg_printf(conn, "HTTP/1.1 %d Created\r\nDate: %s\r\nContent-Length: 0\r\nConnection: %s\r\n\r\n", |
| conn->status_code, date, suggest_connection_header(conn)); |
| } else if (rc == -1) { |
| if (errno == EEXIST) |
| send_http_error(conn, 405, NULL, |
| "Error:mkcol(%s): %s", path, strerror(ERRNO)); |
| else if (errno == EACCES) |
| send_http_error(conn, 403, NULL, |
| "Error: mkcol(%s): %s", path, strerror(ERRNO)); |
| else if(errno == ENOENT) |
| send_http_error(conn, 409, NULL, |
| "Error: mkcol(%s): %s", path, strerror(ERRNO)); |
| else |
| send_http_error(conn, 500, NULL, |
| "fopen(%s): %s", path, strerror(ERRNO)); |
| } |
| } |
| |
| static void put_file(struct mg_connection *conn, const char *path) |
| { |
| struct file file = STRUCT_FILE_INITIALIZER; |
| const char *range; |
| int64_t r1, r2; |
| int rc; |
| char date[64]; |
| time_t curtime = time(NULL); |
| |
| if (mg_stat(conn, path, &file)) { |
| /* File already exists */ |
| conn->status_code = 200; |
| |
| if (file.is_directory) { |
| /* This is an already existing directory, |
| so there is nothing to do for the server. */ |
| rc = 0; |
| |
| } else { |
| /* File exists and is not a directory. */ |
| /* Can it be replaced? */ |
| |
| if (file.modification_time == 0) { |
| /* This is an "in-memory" file, that can not be replaced */ |
| send_http_error(conn, 405, NULL, |
| "Error: Put not possible\nReplacing %s is not supported", path); |
| return; |
| } |
| |
| /* Check if the server may write this file */ |
| if (access(path, W_OK) == 0) { |
| /* Access granted */ |
| conn->status_code = 200; |
| rc = 1; |
| } else { |
| send_http_error(conn, 403, NULL, |
| "Error: Put not possible\nReplacing %s is not allowed", path); |
| return; |
| } |
| } |
| } else { |
| /* File should be created */ |
| conn->status_code = 201; |
| rc = put_dir(conn, path); |
| } |
| |
| if (rc == 0) { |
| /* put_dir returns 0 if path is a directory */ |
| gmt_time_string(date, sizeof(date), &curtime); |
| mg_printf(conn, "HTTP/1.1 %d %s\r\n" |
| "Date: %s\r\n" |
| "Content-Length: 0\r\n" |
| "Connection: %s\r\n\r\n", |
| conn->status_code, mg_get_response_code_text(conn->status_code, NULL), |
| date, |
| suggest_connection_header(conn) |
| ); |
| |
| /* Request to create a directory has been fulfilled successfully. |
| No need to put a file. */ |
| return; |
| } |
| |
| if (rc == -1) { |
| /* put_dir returns -1 if the path is too long */ |
| send_http_error(conn, 414, NULL, |
| "Error: Path too long\nput_dir(%s): %s", path, strerror(ERRNO)); |
| return; |
| } |
| |
| if (rc == -2) { |
| /* put_dir returns -2 if the directory can not be created */ |
| send_http_error(conn, 500, NULL, |
| "Error: Can not create directory\nput_dir(%s): %s", path, strerror(ERRNO)); |
| return; |
| } |
| |
| /* A file should be created or overwritten. */ |
| if (!mg_fopen(conn, path, "wb+", &file) || file.fp == NULL) { |
| mg_fclose(&file); |
| send_http_error(conn, 500, NULL, |
| "Error: Can not create file\nfopen(%s): %s", path, strerror(ERRNO)); |
| return; |
| } |
| |
| fclose_on_exec(&file, conn); |
| range = mg_get_header(conn, "Content-Range"); |
| r1 = r2 = 0; |
| if (range != NULL && parse_range_header(range, &r1, &r2) > 0) { |
| conn->status_code = 206; /* Partial content */ |
| fseeko(file.fp, r1, SEEK_SET); |
| } |
| |
| if (!forward_body_data(conn, file.fp, INVALID_SOCKET, NULL)) { |
| /* forward_body_data failed. |
| The error code has already been sent to the client, |
| and conn->status_code is already set. */ |
| return; |
| } |
| |
| gmt_time_string(date, sizeof(date), &curtime); |
| mg_printf(conn, "HTTP/1.1 %d %s\r\n" |
| "Date: %s\r\n" |
| "Content-Length: 0\r\n" |
| "Connection: %s\r\n\r\n", |
| conn->status_code, mg_get_response_code_text(conn->status_code, NULL), |
| date, |
| suggest_connection_header(conn) |
| ); |
| |
| mg_fclose(&file); |
| } |
| |
| static void delete_file(struct mg_connection *conn, const char *path) |
| { |
| struct de de; |
| memset(&de.file, 0, sizeof(de.file)); |
| if (!mg_stat(conn, path, &de.file)) { |
| /* mg_stat returns 0 if the file does not exist */ |
| send_http_error(conn, 404, NULL, |
| "Error: Cannot delete file\nFile %s not found", path); |
| return; |
| } |
| |
| if (de.file.modification_time == 0) { |
| /* mg_stat returns != 0 and modification_time == 0 |
| if the file is cached in memory */ |
| send_http_error(conn, 405, NULL, |
| "Error: Delete not possible\nDeleting %s is not supported", path); |
| return; |
| } |
| |
| if (de.file.is_directory) { |
| remove_directory(conn, path); |
| /* TODO: remove_dir does not return success of the operation */ |
| /* Assume delete is successful: Return 204 without content. */ |
| send_http_error(conn, 204, NULL, "%s", ""); |
| return; |
| } |
| |
| /* Try to delete path. */ |
| if (mg_remove(path) == 0) { |
| /* Delete was successful: Return 204 without content. */ |
| send_http_error(conn, 204, NULL, "%s", ""); |
| } else { |
| /* Delete not successful (no permissions). */ |
| if(ERRNO==EPERM || ERRNO==EACCES){ |
| send_http_error(conn, 403, NULL, |
| "Error: Delete not possible\nDeleting %s is not allowed", path); |
| } else { |
| /* Delete not successful (file locked). */ |
| send_http_error(conn, 423, NULL, |
| "Error: Cannot delete file\nremove(%s): %s", path, strerror(ERRNO)); |
| } |
| } |
| |
| } |
| |
| static void send_ssi_file(struct mg_connection *, const char *, |
| struct file *, int); |
| |
| static void do_ssi_include(struct mg_connection *conn, const char *ssi, |
| char *tag, int include_level) |
| { |
| char file_name[MG_BUF_LEN], path[512], *p; |
| struct file file = STRUCT_FILE_INITIALIZER; |
| size_t len; |
| |
| /* sscanf() is safe here, since send_ssi_file() also uses buffer |
| of size MG_BUF_LEN to get the tag. So strlen(tag) is |
| always < MG_BUF_LEN. */ |
| if (sscanf(tag, " virtual=\"%511[^\"]\"", file_name) == 1) { |
| /* File name is relative to the webserver root */ |
| file_name[511]=0; |
| (void) mg_snprintf(conn, path, sizeof(path), "%s%c%s", |
| conn->ctx->config[DOCUMENT_ROOT], '/', file_name); |
| } else if (sscanf(tag, " abspath=\"%511[^\"]\"", file_name) == 1) { |
| /* File name is relative to the webserver working directory |
| or it is absolute system path */ |
| file_name[511]=0; |
| (void) mg_snprintf(conn, path, sizeof(path), "%s", file_name); |
| } else if (sscanf(tag, " file=\"%511[^\"]\"", file_name) == 1 || |
| sscanf(tag, " \"%511[^\"]\"", file_name) == 1) { |
| /* File name is relative to the currect document */ |
| file_name[511]=0; |
| (void) mg_snprintf(conn, path, sizeof(path), "%s", ssi); |
| if ((p = strrchr(path, '/')) != NULL) { |
| p[1] = '\0'; |
| } |
| len = strlen(path); |
| (void) mg_snprintf(conn, path + len, sizeof(path) - len, "%s", file_name); |
| } else { |
| mg_cry(conn, "Bad SSI #include: [%s]", tag); |
| return; |
| } |
| |
| if (!mg_fopen(conn, path, "rb", &file)) { |
| mg_cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s", |
| tag, path, strerror(ERRNO)); |
| } else { |
| fclose_on_exec(&file, conn); |
| if (match_prefix(conn->ctx->config[SSI_EXTENSIONS], |
| (int)strlen(conn->ctx->config[SSI_EXTENSIONS]), path) > 0) { |
| send_ssi_file(conn, path, &file, include_level + 1); |
| } else { |
| send_file_data(conn, &file, 0, INT64_MAX); |
| } |
| mg_fclose(&file); |
| } |
| } |
| |
| #if !defined(NO_POPEN) |
| static void do_ssi_exec(struct mg_connection *conn, char *tag) |
| { |
| char cmd[1024] = ""; |
| struct file file = STRUCT_FILE_INITIALIZER; |
| |
| if (sscanf(tag, " \"%1023[^\"]\"", cmd) != 1) { |
| mg_cry(conn, "Bad SSI #exec: [%s]", tag); |
| } else { |
| cmd[1023]=0; |
| if ((file.fp = popen(cmd, "r")) == NULL) { |
| mg_cry(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(ERRNO)); |
| } else { |
| send_file_data(conn, &file, 0, INT64_MAX); |
| pclose(file.fp); |
| } |
| } |
| } |
| #endif /* !NO_POPEN */ |
| |
| static int mg_fgetc(struct file *filep, int offset) |
| { |
| if (filep->membuf != NULL && offset >=0 && offset < filep->size) { |
| return ((unsigned char *) filep->membuf)[offset]; |
| } else if (filep->fp != NULL) { |
| return fgetc(filep->fp); |
| } else { |
| return EOF; |
| } |
| } |
| |
| static void send_ssi_file(struct mg_connection *conn, const char *path, |
| struct file *filep, int include_level) |
| { |
| char buf[MG_BUF_LEN]; |
| int ch, offset, len, in_ssi_tag; |
| |
| if (include_level > 10) { |
| mg_cry(conn, "SSI #include level is too deep (%s)", path); |
| return; |
| } |
| |
| in_ssi_tag = len = offset = 0; |
| while ((ch = mg_fgetc(filep, offset)) != EOF) { |
| if (in_ssi_tag && ch == '>') { |
| in_ssi_tag = 0; |
| buf[len++] = (char) ch; |
| buf[len] = '\0'; |
| assert(len <= (int) sizeof(buf)); |
| if (len < 6 || memcmp(buf, "<!--#", 5) != 0) { |
| /* Not an SSI tag, pass it */ |
| (void) mg_write(conn, buf, (size_t) len); |
| } else { |
| if (!memcmp(buf + 5, "include", 7)) { |
| do_ssi_include(conn, path, buf + 12, include_level); |
| #if !defined(NO_POPEN) |
| } else if (!memcmp(buf + 5, "exec", 4)) { |
| do_ssi_exec(conn, buf + 9); |
| #endif /* !NO_POPEN */ |
| } else { |
| mg_cry(conn, "%s: unknown SSI " "command: \"%s\"", path, buf); |
| } |
| } |
| len = 0; |
| } else if (in_ssi_tag) { |
| if (len == 5 && memcmp(buf, "<!--#", 5) != 0) { |
| /* Not an SSI tag */ |
| in_ssi_tag = 0; |
| } else if (len == (int) sizeof(buf) - 2) { |
| mg_cry(conn, "%s: SSI tag is too large", path); |
| len = 0; |
| } |
| buf[len++] = ch & 0xff; |
| } else if (ch == '<') { |
| in_ssi_tag = 1; |
| if (len > 0) { |
| mg_write(conn, buf, (size_t) len); |
| } |
| len = 0; |
| buf[len++] = ch & 0xff; |
| } else { |
| buf[len++] = ch & 0xff; |
| if (len == (int) sizeof(buf)) { |
| mg_write(conn, buf, (size_t) len); |
| len = 0; |
| } |
| } |
| } |
| |
| /* Send the rest of buffered data */ |
| if (len > 0) { |
| mg_write(conn, buf, (size_t) len); |
| } |
| } |
| |
| static void handle_ssi_file_request(struct mg_connection *conn, |
| const char *path, struct file *filep) |
| { |
| char date[64]; |
| time_t curtime = time(NULL); |
| const char *cors1, *cors2, *cors3; |
| |
| if (mg_get_header(conn, "Origin")) { |
| /* Cross-origin resource sharing (CORS). */ |
| cors1 = "Access-Control-Allow-Origin: "; |
| cors2 = conn->ctx->config[ACCESS_CONTROL_ALLOW_ORIGIN]; |
| cors3 = "\r\n"; |
| } else { |
| cors1 = cors2 = cors3 = ""; |
| } |
| |
| if (!mg_fopen(conn, path, "rb", filep)) { |
| /* File exists (precondition for calling this function), |
| but can not be opened by the server. */ |
| send_http_error(conn, 500, NULL, |
| "Error: Cannot read file\nfopen(%s): %s", path, strerror(ERRNO)); |
| } else { |
| conn->must_close = 1; |
| gmt_time_string(date, sizeof(date), &curtime); |
| fclose_on_exec(filep, conn); |
| mg_printf(conn, "HTTP/1.1 200 OK\r\n" |
| "%s%s%s" |
| "Date: %s\r\n" |
| "Content-Type: text/html\r\n" |
| "Connection: %s\r\n\r\n", |
| cors1, cors2, cors3, |
| date, suggest_connection_header(conn)); |
| send_ssi_file(conn, path, filep, 0); |
| mg_fclose(filep); |
| } |
| } |
| |
| static void send_options(struct mg_connection *conn) |
| { |
| char date[64]; |
| time_t curtime = time(NULL); |
| |
| conn->status_code = 200; |
| conn->must_close = 1; |
| gmt_time_string(date, sizeof(date), &curtime); |
| |
| mg_printf(conn, "HTTP/1.1 200 OK\r\n" |
| "Date: %s\r\n" |
| "Connection: %s\r\n" |
| "Allow: GET, POST, HEAD, CONNECT, PUT, DELETE, OPTIONS, PROPFIND, MKCOL\r\n" |
| "DAV: 1\r\n\r\n", |
| date, suggest_connection_header(conn)); |
| } |
| |
| /* Writes PROPFIND properties for a collection element */ |
| static void print_props(struct mg_connection *conn, const char* uri, |
| struct file *filep) |
| { |
| char mtime[64]; |
| gmt_time_string(mtime, sizeof(mtime), &filep->modification_time); |
| conn->num_bytes_sent += mg_printf(conn, |
| "<d:response>" |
| "<d:href>%s</d:href>" |
| "<d:propstat>" |
| "<d:prop>" |
| "<d:resourcetype>%s</d:resourcetype>" |
| "<d:getcontentlength>%" INT64_FMT "</d:getcontentlength>" |
| "<d:getlastmodified>%s</d:getlastmodified>" |
| "</d:prop>" |
| "<d:status>HTTP/1.1 200 OK</d:status>" |
| "</d:propstat>" |
| "</d:response>\n", |
| uri, |
| filep->is_directory ? "<d:collection/>" : "", |
| filep->size, |
| mtime); |
| } |
| |
| static void print_dav_dir_entry(struct de *de, void *data) |
| { |
| char href[PATH_MAX]; |
| char href_encoded[PATH_MAX]; |
| struct mg_connection *conn = (struct mg_connection *) data; |
| mg_snprintf(conn, href, sizeof(href), "%s%s", |
| conn->request_info.uri, de->file_name); |
| mg_url_encode(href, href_encoded, PATH_MAX-1); |
| print_props(conn, href_encoded, &de->file); |
| } |
| |
| static void handle_propfind(struct mg_connection *conn, const char *path, |
| struct file *filep) |
| { |
| const char *depth = mg_get_header(conn, "Depth"); |
| char date[64]; |
| time_t curtime = time(NULL); |
| |
| gmt_time_string(date, sizeof(date), &curtime); |
| |
| conn->must_close = 1; |
| conn->status_code = 207; |
| mg_printf(conn, "HTTP/1.1 207 Multi-Status\r\n" |
| "Date: %s\r\n" |
| "Connection: %s\r\n" |
| "Content-Type: text/xml; charset=utf-8\r\n\r\n", |
| date, suggest_connection_header(conn)); |
| |
| conn->num_bytes_sent += mg_printf(conn, |
| "<?xml version=\"1.0\" encoding=\"utf-8\"?>" |
| "<d:multistatus xmlns:d='DAV:'>\n"); |
| |
| /* Print properties for the requested resource itself */ |
| print_props(conn, conn->request_info.uri, filep); |
| |
| /* If it is a directory, print directory entries too if Depth is not 0 */ |
| if (filep->is_directory && |
| !mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes") && |
| (depth == NULL || strcmp(depth, "0") != 0)) { |
| scan_directory(conn, path, conn, &print_dav_dir_entry); |
| } |
| |
| conn->num_bytes_sent += mg_printf(conn, "%s\n", "</d:multistatus>"); |
| } |
| |
| void mg_lock_connection(struct mg_connection* conn) |
| { |
| (void) pthread_mutex_lock(&conn->mutex); |
| } |
| |
| void mg_unlock_connection(struct mg_connection* conn) |
| { |
| (void) pthread_mutex_unlock(&conn->mutex); |
| } |
| |
| void mg_lock_context(struct mg_context* ctx) |
| { |
| (void) pthread_mutex_lock(&ctx->nonce_mutex); |
| } |
| |
| void mg_unlock_context(struct mg_context* ctx) |
| { |
| (void) pthread_mutex_unlock(&ctx->nonce_mutex); |
| } |
| |
| #if defined(USE_TIMERS) |
| #include "timer.inl" |
| #endif /* USE_TIMERS */ |
| |
| #ifdef USE_LUA |
| #include "mod_lua.inl" |
| #endif /* USE_LUA */ |
| |
| #if defined(USE_WEBSOCKET) |
| |
| /* START OF SHA-1 code |
| Copyright(c) By Steve Reid <steve@edmweb.com> */ |
| #define SHA1HANDSOFF |
| #if defined(__sun) |
| #include "solarisfixes.h" |
| #endif |
| |
| static int is_big_endian(void) |
| { |
| static const int n = 1; |
| return ((char *) &n)[0] == 0; |
| } |
| |
| union char64long16 { |
| unsigned char c[64]; |
| uint32_t l[16]; |
| }; |
| |
| #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) |
| |
| static uint32_t blk0(union char64long16 *block, int i) |
| { |
| /* Forrest: SHA expect BIG_ENDIAN, swap if LITTLE_ENDIAN */ |
| if (!is_big_endian()) { |
| block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) | |
| (rol(block->l[i], 8) & 0x00FF00FF); |
| } |
| return block->l[i]; |
| } |
| |
| #define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \ |
| ^block->l[(i+2)&15]^block->l[i&15],1)) |
| #define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(block, i)+0x5A827999+rol(v,5);w=rol(w,30); |
| #define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30); |
| #define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30); |
| #define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30); |
| #define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30); |
| |
| typedef struct { |
| uint32_t state[5]; |
| uint32_t count[2]; |
| unsigned char buffer[64]; |
| } SHA1_CTX; |
| |
| static void SHA1Transform(uint32_t state[5], const unsigned char buffer[64]) |
| { |
| uint32_t a, b, c, d, e; |
| union char64long16 block[1]; |
| |
| memcpy(block, buffer, 64); |
| a = state[0]; |
| b = state[1]; |
| c = state[2]; |
| d = state[3]; |
| e = state[4]; |
| R0(a,b,c,d,e, 0); |
| R0(e,a,b,c,d, 1); |
| R0(d,e,a,b,c, 2); |
| R0(c,d,e,a,b, 3); |
| R0(b,c,d,e,a, 4); |
| R0(a,b,c,d,e, 5); |
| R0(e,a,b,c,d, 6); |
| R0(d,e,a,b,c, 7); |
| R0(c,d,e,a,b, 8); |
| R0(b,c,d,e,a, 9); |
| R0(a,b,c,d,e,10); |
| R0(e,a,b,c,d,11); |
| R0(d,e,a,b,c,12); |
| R0(c,d,e,a,b,13); |
| R0(b,c,d,e,a,14); |
| R0(a,b,c,d,e,15); |
| R1(e,a,b,c,d,16); |
| R1(d,e,a,b,c,17); |
| R1(c,d,e,a,b,18); |
| R1(b,c,d,e,a,19); |
| R2(a,b,c,d,e,20); |
| R2(e,a,b,c,d,21); |
| R2(d,e,a,b,c,22); |
| R2(c,d,e,a,b,23); |
| R2(b,c,d,e,a,24); |
| R2(a,b,c,d,e,25); |
| R2(e,a,b,c,d,26); |
| R2(d,e,a,b,c,27); |
| R2(c,d,e,a,b,28); |
| R2(b,c,d,e,a,29); |
| R2(a,b,c,d,e,30); |
| R2(e,a,b,c,d,31); |
| R2(d,e,a,b,c,32); |
| R2(c,d,e,a,b,33); |
| R2(b,c,d,e,a,34); |
| R2(a,b,c,d,e,35); |
| R2(e,a,b,c,d,36); |
| R2(d,e,a,b,c,37); |
| R2(c,d,e,a,b,38); |
| R2(b,c,d,e,a,39); |
| R3(a,b,c,d,e,40); |
| R3(e,a,b,c,d,41); |
| R3(d,e,a,b,c,42); |
| R3(c,d,e,a,b,43); |
| R3(b,c,d,e,a,44); |
| R3(a,b,c,d,e,45); |
| R3(e,a,b,c,d,46); |
| R3(d,e,a,b,c,47); |
| R3(c,d,e,a,b,48); |
| R3(b,c,d,e,a,49); |
| R3(a,b,c,d,e,50); |
| R3(e,a,b,c,d,51); |
| R3(d,e,a,b,c,52); |
| R3(c,d,e,a,b,53); |
| R3(b,c,d,e,a,54); |
| R3(a,b,c,d,e,55); |
| R3(e,a,b,c,d,56); |
| R3(d,e,a,b,c,57); |
| R3(c,d,e,a,b,58); |
| R3(b,c,d,e,a,59); |
| R4(a,b,c,d,e,60); |
| R4(e,a,b,c,d,61); |
| R4(d,e,a,b,c,62); |
| R4(c,d,e,a,b,63); |
| R4(b,c,d,e,a,64); |
| R4(a,b,c,d,e,65); |
| R4(e,a,b,c,d,66); |
| R4(d,e,a,b,c,67); |
| R4(c,d,e,a,b,68); |
| R4(b,c,d,e,a,69); |
| R4(a,b,c,d,e,70); |
| R4(e,a,b,c,d,71); |
| R4(d,e,a,b,c,72); |
| R4(c,d,e,a,b,73); |
| R4(b,c,d,e,a,74); |
| R4(a,b,c,d,e,75); |
| R4(e,a,b,c,d,76); |
| R4(d,e,a,b,c,77); |
| R4(c,d,e,a,b,78); |
| R4(b,c,d,e,a,79); |
| state[0] += a; |
| state[1] += b; |
| state[2] += c; |
| state[3] += d; |
| state[4] += e; |
| a = b = c = d = e = 0; |
| memset(block, '\0', sizeof(block)); |
| } |
| |
| static void SHA1Init(SHA1_CTX* context) |
| { |
| context->state[0] = 0x67452301; |
| context->state[1] = 0xEFCDAB89; |
| context->state[2] = 0x98BADCFE; |
| context->state[3] = 0x10325476; |
| context->state[4] = 0xC3D2E1F0; |
| context->count[0] = context->count[1] = 0; |
| } |
| |
| static void SHA1Update(SHA1_CTX* context, const unsigned char* data, |
| uint32_t len) |
| { |
| uint32_t i, j; |
| |
| j = context->count[0]; |
| if ((context->count[0] += len << 3) < j) |
| context->count[1]++; |
| context->count[1] += (len>>29); |
| j = (j >> 3) & 63; |
| if ((j + len) > 63) { |
| memcpy(&context->buffer[j], data, (i = 64-j)); |
| SHA1Transform(context->state, context->buffer); |
| for ( ; i + 63 < len; i += 64) { |
| SHA1Transform(context->state, &data[i]); |
| } |
| j = 0; |
| } else i = 0; |
| memcpy(&context->buffer[j], &data[i], len - i); |
| } |
| |
| static void SHA1Final(unsigned char digest[20], SHA1_CTX* context) |
| { |
| unsigned i; |
| unsigned char finalcount[8], c; |
| |
| for (i = 0; i < 8; i++) { |
| finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)] |
| >> ((3-(i & 3)) * 8) ) & 255); |
| } |
| c = 0200; |
| SHA1Update(context, &c, 1); |
| while ((context->count[0] & 504) != 448) { |
| c = 0000; |
| SHA1Update(context, &c, 1); |
| } |
| SHA1Update(context, finalcount, 8); |
| for (i = 0; i < 20; i++) { |
| digest[i] = (unsigned char) |
| ((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255); |
| } |
| memset(context, '\0', sizeof(*context)); |
| memset(&finalcount, '\0', sizeof(finalcount)); |
| } |
| /* END OF SHA1 CODE */ |
| |
| static void send_websocket_handshake(struct mg_connection *conn) |
| { |
| static const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"; |
| char buf[100], sha[20], b64_sha[sizeof(sha) * 2]; |
| SHA1_CTX sha_ctx; |
| |
| mg_snprintf(conn, buf, sizeof(buf), "%s%s", |
| mg_get_header(conn, "Sec-WebSocket-Key"), magic); |
| SHA1Init(&sha_ctx); |
| SHA1Update(&sha_ctx, (unsigned char *) buf, (uint32_t)strlen(buf)); |
| SHA1Final((unsigned char *) sha, &sha_ctx); |
| base64_encode((unsigned char *) sha, sizeof(sha), b64_sha); |
| mg_printf(conn, "%s%s%s", |
| "HTTP/1.1 101 Switching Protocols\r\n" |
| "Upgrade: websocket\r\n" |
| "Connection: Upgrade\r\n" |
| "Sec-WebSocket-Accept: ", b64_sha, "\r\n\r\n"); |
| } |
| |
| static void read_websocket(struct mg_connection *conn) |
| { |
| /* Pointer to the beginning of the portion of the incoming websocket |
| message queue. |
| The original websocket upgrade request is never removed, so the queue |
| begins after it. */ |
| unsigned char *buf = (unsigned char *) conn->buf + conn->request_len; |
| int n, error; |
| |
| /* body_len is the length of the entire queue in bytes |
| len is the length of the current message |
| data_len is the length of the current message's data payload |
| header_len is the length of the current message's header */ |
| size_t i, len, mask_len, data_len, header_len, body_len; |
| |
| /* "The masking key is a 32-bit value chosen at random by the client." |
| http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-17#section-5 */ |
| unsigned char mask[4]; |
| |
| /* data points to the place where the message is stored when passed to the |
| websocket_data callback. This is either mem on the stack, or a |
| dynamically allocated buffer if it is too large. */ |
| char mem[4096]; |
| char *data = mem; |
| unsigned char mop; /* mask flag and opcode */ |
| |
| mg_set_thread_name("wsock"); |
| |
| /* Loop continuously, reading messages from the socket, invoking the |
| callback, and waiting repeatedly until an error occurs. */ |
| /* TODO: Investigate if this next line is needed |
| assert(conn->content_len == 0); */ |
| while (!conn->ctx->stop_flag) { |
| header_len = 0; |
| assert(conn->data_len >= conn->request_len); |
| if ((body_len = conn->data_len - conn->request_len) >= 2) { |
| len = buf[1] & 127; |
| mask_len = buf[1] & 128 ? 4 : 0; |
| if (len < 126 && body_len >= mask_len) { |
| data_len = len; |
| header_len = 2 + mask_len; |
| } else if (len == 126 && body_len >= 4 + mask_len) { |
| header_len = 4 + mask_len; |
| data_len = ((((int) buf[2]) << 8) + buf[3]); |
| } else if (body_len >= 10 + mask_len) { |
| header_len = 10 + mask_len; |
| data_len = (((uint64_t) ntohl(* (uint32_t *) &buf[2])) << 32) + |
| ntohl(* (uint32_t *) &buf[6]); |
| } |
| } |
| |
| if (header_len > 0 && body_len >= header_len) { |
| /* Allocate space to hold websocket payload */ |
| data = mem; |
| if (data_len > sizeof(mem)) { |
| data = (char *)mg_malloc(data_len); |
| if (data == NULL) { |
| /* Allocation failed, exit the loop and then close the |
| connection */ |
| mg_cry(conn, "websocket out of memory; closing connection"); |
| break; |
| } |
| } |
| |
| /* Copy the mask before we shift the queue and destroy it */ |
| if (mask_len > 0) { |
| memcpy(mask, buf + header_len - mask_len, sizeof(mask)); |
| } else { |
| memset(mask, 0, sizeof(mask)); |
| } |
| |
| /* Read frame payload from the first message in the queue into |
| data and advance the queue by moving the memory in place. */ |
| assert(body_len >= header_len); |
| if (data_len + header_len > body_len) { |
| mop = buf[0]; /* current mask and opcode */ |
| /* Overflow case */ |
| len = body_len - header_len; |
| memcpy(data, buf + header_len, len); |
| error = 0; |
| while (len < data_len) { |
| int n = pull(NULL, conn, data + len, (int)(data_len - len)); |
| if (n <= 0) { |
| error = 1; |
| break; |
| } |
| len += n; |
| } |
| if (error) { |
| mg_cry(conn, "Websocket pull failed; closing connection"); |
| break; |
| } |
| conn->data_len = conn->request_len; |
| } else { |
| mop = buf[0]; /* current mask and opcode, overwritten by memmove() */ |
| /* Length of the message being read at the front of the |
| queue */ |
| len = data_len + header_len; |
| |
| /* Copy the data payload into the data pointer for the |
| callback */ |
| memcpy(data, buf + header_len, data_len); |
| |
| /* Move the queue forward len bytes */ |
| memmove(buf, buf + len, body_len - len); |
| |
| /* Mark the queue as advanced */ |
| conn->data_len -= (int)len; |
| } |
| |
| /* Apply mask if necessary */ |
| if (mask_len > 0) { |
| for (i = 0; i < data_len; ++i) { |
| data[i] ^= mask[i & 3]; |
| } |
| } |
| |
| /* Exit the loop if callback signalled to exit, |
| or "connection close" opcode received. */ |
| if ((conn->ctx->callbacks.websocket_data != NULL && |
| #ifdef USE_LUA |
| (conn->lua_websocket_state == NULL) && |
| #endif |
| !conn->ctx->callbacks.websocket_data(conn, mop, data, data_len)) || |
| #ifdef USE_LUA |
| (conn->lua_websocket_state && |
| !lua_websocket_data(conn, conn->lua_websocket_state, mop, data, data_len)) || |
| #endif |
| (mop & 0xf) == WEBSOCKET_OPCODE_CONNECTION_CLOSE) { /* Opcode == 8, connection close */ |
| break; |
| } |
| |
| if (data != mem) { |
| mg_free(data); |
| } |
| /* Not breaking the loop, process next websocket frame. */ |
| } else { |
| /* Read from the socket into the next available location in the |
| message queue. */ |
| if ((n = pull(NULL, conn, conn->buf + conn->data_len, |
| conn->buf_size - conn->data_len)) <= 0) { |
| /* Error, no bytes read */ |
| break; |
| } |
| conn->data_len += n; |
| } |
| } |
| |
| mg_set_thread_name("worker"); |
| } |
| |
| int mg_websocket_write(struct mg_connection* conn, int opcode, const char* data, size_t dataLen) |
| { |
| unsigned char header[10]; |
| size_t headerLen = 1; |
| |
| int retval = -1; |
| |
| header[0] = 0x80 + (opcode & 0xF); |
| |
| /* Frame format: http://tools.ietf.org/html/rfc6455#section-5.2 */ |
| if (dataLen < 126) { |
| /* inline 7-bit length field */ |
| header[1] = (unsigned char)dataLen; |
| headerLen = 2; |
| } else if (dataLen <= 0xFFFF) { |
| /* 16-bit length field */ |
| header[1] = 126; |
| *(uint16_t*)(header + 2) = htons((uint16_t)dataLen); |
| headerLen = 4; |
| } else { |
| /* 64-bit length field */ |
| header[1] = 127; |
| *(uint32_t*)(header + 2) = htonl((uint64_t)dataLen >> 32); |
| *(uint32_t*)(header + 6) = htonl(dataLen & 0xFFFFFFFF); |
| headerLen = 10; |
| } |
| |
| /* Note that POSIX/Winsock's send() is threadsafe |
| http://stackoverflow.com/questions/1981372/are-parallel-calls-to-send-recv-on-the-same-socket-valid |
| but mongoose's mg_printf/mg_write is not (because of the loop in |
| push(), although that is only a problem if the packet is large or |
| outgoing buffer is full). */ |
| (void) mg_lock_connection(conn); |
| retval = mg_write(conn, header, headerLen); |
| retval = mg_write(conn, data, dataLen); |
| mg_unlock_connection(conn); |
| |
| return retval; |
| } |
| |
| static void handle_websocket_request(struct mg_connection *conn, const char *path, int is_script_resource) |
| { |
| const char *version = mg_get_header(conn, "Sec-WebSocket-Version"); |
| #ifdef USE_LUA |
| int lua_websock = 0; |
| #endif |
| |
| if (version == NULL || strcmp(version, "13") != 0) { |
| send_http_error(conn, 426, NULL, "%s", "Protocol upgrade required"); |
| } else if (conn->ctx->callbacks.websocket_connect != NULL && |
| conn->ctx->callbacks.websocket_connect(conn) != 0) { |
| /* C callback has returned non-zero, do not proceed with handshake. */ |
| /* The C callback is called before Lua and may prevent Lua from handling the websocket. */ |
| } else { |
| #ifdef USE_LUA |
| if (conn->ctx->config[LUA_WEBSOCKET_EXTENSIONS]) { |
| lua_websock = match_prefix(conn->ctx->config[LUA_WEBSOCKET_EXTENSIONS], |
| (int)strlen(conn->ctx->config[LUA_WEBSOCKET_EXTENSIONS]), |
| path); |
| } |
| |
| if (lua_websock) { |
| conn->lua_websocket_state = lua_websocket_new(path, conn); |
| if (conn->lua_websocket_state) { |
| send_websocket_handshake(conn); |
| if (lua_websocket_ready(conn, conn->lua_websocket_state)) { |
| read_websocket(conn); |
| } |
| } |
| } else |
| #endif |
| { |
| /* No Lua websock script specified. */ |
| send_websocket_handshake(conn); |
| if (conn->ctx->callbacks.websocket_ready != NULL) { |
| conn->ctx->callbacks.websocket_ready(conn); |
| } |
| read_websocket(conn); |
| } |
| } |
| } |
| |
| static int is_websocket_protocol(const struct mg_connection *conn) |
| { |
| const char *host, *upgrade, *connection, *version, *key; |
| |
| upgrade = mg_get_header(conn, "Upgrade"); |
| if (upgrade == NULL) return 0; /* fail early, don't waste time checking other header fields */ |
| if (!mg_strcasestr(upgrade, "websocket")) return 0; |
| |
| connection = mg_get_header(conn, "Connection"); |
| if (connection == NULL) return 0; |
| if (!mg_strcasestr(connection, "upgrade")) return 0; |
| |
| host = mg_get_header(conn, "Host"); |
| key = mg_get_header(conn, "Sec-WebSocket-Key"); |
| version = mg_get_header(conn, "Sec-WebSocket-Version"); |
| |
| return host != NULL && |
| key != NULL && version != NULL; |
| } |
| #endif /* !USE_WEBSOCKET */ |
| |
| static int isbyte(int n) |
| { |
| return n >= 0 && n <= 255; |
| } |
| |
| static int parse_net(const char *spec, uint32_t *net, uint32_t *mask) |
| { |
| int n, a, b, c, d, slash = 32, len = 0; |
| |
| if ((sscanf(spec, "%d.%d.%d.%d/%d%n", &a, &b, &c, &d, &slash, &n) == 5 || |
| sscanf(spec, "%d.%d.%d.%d%n", &a, &b, &c, &d, &n) == 4) && |
| isbyte(a) && isbyte(b) && isbyte(c) && isbyte(d) && |
| slash >= 0 && slash < 33) { |
| len = n; |
| *net = ((uint32_t)a << 24) | ((uint32_t)b << 16) | ((uint32_t)c << 8) | d; |
| *mask = slash ? 0xffffffffU << (32 - slash) : 0; |
| } |
| |
| return len; |
| } |
| |
| static int set_throttle(const char *spec, uint32_t remote_ip, const char *uri) |
| { |
| int throttle = 0; |
| struct vec vec, val; |
| uint32_t net, mask; |
| char mult; |
| double v; |
| |
| while ((spec = next_option(spec, &vec, &val)) != NULL) { |
| mult = ','; |
| if (sscanf(val.ptr, "%lf%c", &v, &mult) < 1 || v < 0 || |
| (lowercase(&mult) != 'k' && lowercase(&mult) != 'm' && mult != ',')) { |
| continue; |
| } |
| v *= lowercase(&mult) == 'k' ? 1024 : lowercase(&mult) == 'm' ? 1048576 : 1; |
| if (vec.len == 1 && vec.ptr[0] == '*') { |
| throttle = (int) v; |
| } else if (parse_net(vec.ptr, &net, &mask) > 0) { |
| if ((remote_ip & mask) == net) { |
| throttle = (int) v; |
| } |
| } else if (match_prefix(vec.ptr, (int)vec.len, uri) > 0) { |
| throttle = (int) v; |
| } |
| } |
| |
| return throttle; |
| } |
| |
| static uint32_t get_remote_ip(const struct mg_connection *conn) |
| { |
| return ntohl(* (uint32_t *) &conn->client.rsa.sin.sin_addr); |
| } |
| |
| int mg_upload2(struct mg_connection *conn, const char *destination_dir, int timeout) |
| { |
| /* TODO: set a timeout */ |
| const char *content_type_header, *boundary_start, *sc; |
| char *s; |
| char buf[MG_BUF_LEN], path[PATH_MAX], tmp_path[PATH_MAX], fname[1024], boundary[100]; |
| FILE *fp; |
| int bl, n, i, headers_len, boundary_len, eof, |
| len = 0, num_uploaded_files = 0; |
| struct mg_request_info part_request_info; |
| |
| /* Request looks like this: |
| |
| POST /upload HTTP/1.1 |
| Host: 127.0.0.1:8080 |
| Content-Length: 244894 |
| Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryRVr |
| |
| ------WebKitFormBoundaryRVr |
| Content-Disposition: form-data; name="file"; filename="accum.png" |
| Content-Type: image/png |
| |
| <89>PNG |
| <PNG DATA> |
| ------WebKitFormBoundaryRVr */ |
| |
| /* Extract boundary string from the Content-Type header */ |
| if ((content_type_header = mg_get_header(conn, "Content-Type")) == NULL || |
| (boundary_start = mg_strcasestr(content_type_header, |
| "boundary=")) == NULL || |
| (sscanf(boundary_start, "boundary=\"%99[^\"]\"", boundary) == 0 && |
| sscanf(boundary_start, "boundary=%99s", boundary) == 0) || |
| boundary[0] == '\0') { |
| return num_uploaded_files; |
| } |
| |
| boundary[99]=0; |
| boundary_len = (int)strlen(boundary); |
| bl = boundary_len + 4; /* \r\n--<boundary> */ |
| for (;;) { |
| /* Pull in headers */ |
| assert(len >= 0 && len <= (int) sizeof(buf)); |
| while ((n = mg_read(conn, buf + len, sizeof(buf) - len)) > 0) { |
| len += n; |
| assert(len <= (int) sizeof(buf)); |
| } |
| if ((headers_len = get_request_len(buf, len)) <= 0) { |
| break; |
| } |
| |
| /* terminate header */ |
| buf[headers_len-1]=0; |
| |
| /* Scan for the boundary string and skip it */ |
| if (buf[0]=='-' && buf[1]=='-' && !memcmp(buf+2, boundary, boundary_len)) { |
| s = &buf[bl]; |
| } else { |
| s = &buf[2]; |
| } |
| |
| /* Get headers for this part of the multipart message */ |
| memset(&part_request_info, 0, sizeof(part_request_info)); |
| parse_http_headers(&s, &part_request_info); |
| assert(&buf[headers_len-1] == s); |
| |
| /* Fetch file name. */ |
| sc = get_header(&part_request_info, "Content-Disposition"); |
| if (!sc) { |
| /* invalid part of a multipart message */ |
| break; |
| } |
| |
| sc = strstr(sc, "filename"); |
| if (!sc) { |
| /* no filename set */ |
| break; |
| } |
| sc += 8; /* skip "filename" */ |
| fname[0] = '\0'; |
| IGNORE_UNUSED_RESULT(sscanf(sc, " = \"%1023[^\"]", fname)); |
| fname[1023]=0; |
| |
| /* Give up if the headers are not what we expect */ |
| if (fname[0] == '\0') { |
| break; |
| } |
| |
| /* Construct destination file name. Do not allow paths to have |
| slashes. */ |
| if ((s = strrchr(fname, '/')) == NULL && |
| (s = strrchr(fname, '\\')) == NULL) { |
| s = fname; |
| } else { |
| s++; |
| } |
| |
| /* There data is written to a temporary file first. */ |
| /* Different users should use a different destination_dir. */ |
| snprintf(path, sizeof(path)-1, "%s/%s", destination_dir, s); |
| strcpy(tmp_path, path); |
| strcat(tmp_path, "~"); |
| |
| /* We open the file with exclusive lock held. This guarantee us |
| there is no other thread can save into the same file |
| simultaneously. */ |
| fp = NULL; |
| /* Open file in binary mode. */ |
| if ((fp = fopen(tmp_path, "wb")) == NULL) { |
| break; |
| } |
| |
| /* Move data to the beginning of the buffer */ |
| /* part_request_info is no longer valid after this operation */ |
| assert(len >= headers_len); |
| memmove(buf, &buf[headers_len], len - headers_len); |
| len -= headers_len; |
| |
| /* Read POST data, write into file until boundary is found. */ |
| eof = n = 0; |
| do { |
| len += n; |
| for (i = 0; i < len - bl; i++) { |
| if (!memcmp(&buf[i], "\r\n--", 4) && |
| !memcmp(&buf[i + 4], boundary, boundary_len)) { |
| /* Found boundary, that's the end of file data. */ |
| fwrite(buf, 1, i, fp); |
| eof = 1; |
| memmove(buf, &buf[i + bl], len - (i + bl)); |
| len -= i + bl; |
| break; |
| } |
| } |
| if (!eof && len > bl) { |
| fwrite(buf, 1, len - bl, fp); |
| memmove(buf, &buf[len - bl], bl); |
| len = bl; |
| } |
| } while (!eof && (n = mg_read(conn, buf + len, sizeof(buf) - len)) > 0); |
| fclose(fp); |
| if (eof) { |
| if( remove(path) == -1){ |
| mg_cry(conn,"Unable to remove %s",path); |
| } |
| if( rename(tmp_path, path) == -1){ |
| mg_cry(conn,"Unable to rename %s to %s",tmp_path,path); |
| } |
| num_uploaded_files++; |
| if (conn->ctx->callbacks.upload != NULL) { |
| conn->ctx->callbacks.upload(conn, path); |
| } |
| } else { |
| if( remove(tmp_path) == -1){ |
| mg_cry(conn,"Unable to remove %s",tmp_path); |
| } |
| } |
| } |
| |
| return num_uploaded_files; |
| } |
| |
| int mg_upload(struct mg_connection *conn, const char *destination_dir) |
| { |
| return mg_upload2(conn, destination_dir, TIMEOUT_INFINITE); |
| } |
| |
| static int get_first_ssl_listener_index(const struct mg_context *ctx) |
| { |
| int i, idx = -1; |
| for (i = 0; idx == -1 && i < ctx->num_listening_sockets; i++) { |
| idx = ctx->listening_sockets[i].is_ssl ? i : -1; |
| } |
| return idx; |
| } |
| |
| static void redirect_to_https_port(struct mg_connection *conn, int ssl_index) |
| { |
| char host[1025]; |
| const char *host_header; |
| size_t hostlen; |
| |
| host_header = mg_get_header(conn, "Host"); |
| hostlen = sizeof(host); |
| if (host_header != NULL) { |
| char *pos; |
| |
| mg_strlcpy(host, host_header, hostlen); |
| host[hostlen - 1] = '\0'; |
| pos = strchr(host, ':'); |
| if (pos != NULL) { |
| *pos = '\0'; |
| } |
| } else { |
| /* Cannot get host from the Host: header. |
| Fallback to our IP address. */ |
| sockaddr_to_string(host, hostlen, &conn->client.lsa); |
| } |
| |
| /* Send host, port, uri and (if it exists) ?query_string */ |
| mg_printf(conn, "HTTP/1.1 302 Found\r\nLocation: https://%s:%d%s%s%s\r\n\r\n", |
| host, |
| (int) ntohs(conn->ctx->listening_sockets[ssl_index].lsa.sin.sin_port), |
| conn->request_info.uri, |
| (conn->request_info.query_string == NULL) ? "" : "?", |
| (conn->request_info.query_string == NULL) ? "" : conn->request_info.query_string |
| ); |
| } |
| |
| |
| void mg_set_request_handler(struct mg_context *ctx, const char *uri, mg_request_handler handler, void *cbdata) |
| { |
| struct mg_request_handler_info *tmp_rh, *lastref = NULL; |
| size_t urilen = strlen(uri); |
| |
| /* first see it the uri exists */ |
| for (tmp_rh = ctx->request_handlers; |
| tmp_rh != NULL && 0!=strcmp(uri, tmp_rh->uri); |
| lastref = tmp_rh, tmp_rh = tmp_rh->next) { |
| /* first try for an exact match */ |
| if (urilen == tmp_rh->uri_len && !strcmp(tmp_rh->uri,uri)) { |
| /* already there... */ |
| |
| if (handler != NULL) { |
| /* change this entry */ |
| tmp_rh->handler = handler; |
| tmp_rh->cbdata = cbdata; |
| } else { |
| /* remove this entry */ |
| if (lastref != NULL) |
| lastref->next = tmp_rh->next; |
| else |
| ctx->request_handlers = tmp_rh->next; |
| mg_free(tmp_rh->uri); |
| mg_free(tmp_rh); |
| } |
| return; |
| } |
| |
| /* next try for a partial match, we will accept uri/something */ |
| if (tmp_rh->uri_len < urilen |
| && uri[tmp_rh->uri_len] == '/' |
| && memcmp(tmp_rh->uri, uri, tmp_rh->uri_len) == 0) { |
| /* if there is a partical match this new entry MUST go BEFORE |
| the current position otherwise it will never be matched. */ |
| break; |
| } |
| } |
| |
| if (handler == NULL) { |
| /* no handler to set, this was a remove request */ |
| return; |
| } |
| |
| tmp_rh = (struct mg_request_handler_info *)mg_malloc(sizeof(struct mg_request_handler_info)); |
| if (tmp_rh == NULL) { |
| mg_cry(fc(ctx), "%s", "Cannot create new request handler struct, OOM"); |
| return; |
| } |
| tmp_rh->uri = mg_strdup(uri); |
| tmp_rh->uri_len = urilen; |
| tmp_rh->handler = handler; |
| tmp_rh->cbdata = cbdata; |
| |
| if (lastref == NULL) { |
| tmp_rh->next = ctx->request_handlers; |
| ctx->request_handlers = tmp_rh; |
| } else { |
| tmp_rh->next = lastref->next; |
| lastref->next = tmp_rh; |
| } |
| } |
| |
| static int use_request_handler(struct mg_connection *conn) |
| { |
| struct mg_request_info *request_info = mg_get_request_info(conn); |
| const char *uri = request_info->uri; |
| size_t urilen = strlen(uri); |
| struct mg_request_handler_info *tmp_rh = conn->ctx->request_handlers; |
| |
| for (; tmp_rh != NULL; tmp_rh = tmp_rh->next) { |
| |
| /* first try for an exact match */ |
| if (urilen == tmp_rh->uri_len && !strcmp(tmp_rh->uri,uri)) { |
| return tmp_rh->handler(conn, tmp_rh->cbdata); |
| } |
| |
| /* next try for a partial match */ |
| /* we will accept uri/something */ |
| if (tmp_rh->uri_len < urilen |
| && uri[tmp_rh->uri_len] == '/' |
| && memcmp(tmp_rh->uri, uri, tmp_rh->uri_len) == 0) { |
| |
| return tmp_rh->handler(conn, tmp_rh->cbdata); |
| } |
| |
| /* try for pattern match */ |
| if (match_prefix(tmp_rh->uri, (int)tmp_rh->uri_len, uri) > 0) { |
| return tmp_rh->handler(conn, tmp_rh->cbdata); |
| } |
| |
| } |
| |
| return 0; /* none found */ |
| } |
| |
| /* This is the heart of the Civetweb's printfc. |
| This function is called when the request is read, parsed and validated, |
| and Civetweb must decide what action to take: serve a file, or |
| a directory, or call embedded function, etcetera. */ |
| static void handle_request(struct mg_connection *conn) |
| { |
| struct mg_request_info *ri = &conn->request_info; |
| char path[PATH_MAX]; |
| int uri_len, ssl_index, is_script_resource, is_websocket_request, is_put_or_delete_request; |
| int i; |
| struct file file = STRUCT_FILE_INITIALIZER; |
| time_t curtime = time(NULL); |
| #if !defined(NO_FILES) |
| char date[64]; |
| #endif |
| |
| /* 1. get the request url */ |
| /* 1.1. split into url and query string */ |
| if ((conn->request_info.query_string = strchr(ri->uri, '?')) != NULL) { |
| * ((char *) conn->request_info.query_string++) = '\0'; |
| } |
| uri_len = (int) strlen(ri->uri); |
| |
| /* 1.2. decode url (if config says so) */ |
| if (should_decode_url(conn)) { |
| mg_url_decode(ri->uri, uri_len, (char *) ri->uri, uri_len + 1, 0); |
| } |
| |
| /* 1.3. clean URIs, so a path like allowed_dir/../forbidden_file is not possible */ |
| remove_double_dots_and_double_slashes((char *) ri->uri); |
| |
| /* step 1. completed, the url is known now */ |
| DEBUG_TRACE("URL: %s", ri->uri); |
| |
| /* 2. do a https redirect, if required */ |
| if (!conn->client.is_ssl && conn->client.ssl_redir) { |
| ssl_index = get_first_ssl_listener_index(conn->ctx); |
| if (ssl_index >= 0) { |
| redirect_to_https_port(conn, ssl_index); |
| } else { |
| /* A http to https forward port has been specified, |
| but no https port to forward to. */ |
| send_http_error(conn, 503, NULL, "%s", |
| "Error: SSL forward not configured properly"); |
| mg_cry(conn, "Can not redirect to SSL, no SSL port available"); |
| } |
| return; |
| } |
| |
| /* 3. if this ip has limited speed, set it for this connection */ |
| conn->throttle = set_throttle(conn->ctx->config[THROTTLE], |
| get_remote_ip(conn), ri->uri); |
| |
| /* 4. call a "handle everything" callback, if registered */ |
| if (conn->ctx->callbacks.begin_request != NULL) { |
| /* Note that since V1.7 the "begin_request" function is called |
| before an authorization check. If an authorization check is |
| required, use a request_handler instead. */ |
| i = conn->ctx->callbacks.begin_request(conn); |
| switch (i) { |
| case 1: |
| /* callback already processed the request */ |
| return; |
| case 0: |
| /* civetweb should process the request */ |
| break; |
| default: |
| /* unspecified - may change with the next version */ |
| return; |
| } |
| } |
| |
| /* request not yet handled by a handler or redirect, so the request |
| is processed here */ |
| |
| /* 5. interpret the url to find out how the request must be handled */ |
| path[0] = '\0'; |
| interpret_uri(conn, path, sizeof(path), &file, &is_script_resource, &is_websocket_request, &is_put_or_delete_request); |
| |
| /* 6. authorization check */ |
| if (is_put_or_delete_request && !is_script_resource) { |
| /* 6.1. this request is a PUT/DELETE to a real file */ |
| /* 6.1.1. thus, the server must have real files */ |
| #if defined(NO_FILES) |
| if (1) { |
| #else |
| if (conn->ctx->config[DOCUMENT_ROOT] == NULL) { |
| #endif |
| /* This server does not have any real files, thus the |
| PUT/DELETE methods are not valid. */ |
| send_http_error(conn, 405, NULL, |
| "%s method not allowed", conn->request_info.request_method); |
| return; |
| } |
| |
| /* 6.1.2. Check if put authorization for static files is available. */ |
| if (!is_authorized_for_put(conn)) { |
| send_authorization_request(conn); |
| return; |
| } |
| |
| } else { |
| /* 6.2. This is either a OPTIONS, GET, HEAD or POST request, |
| or it is a PUT or DELETE request to a resource that does not |
| correspond to a file. Check authorization. */ |
| if (!check_authorization(conn, path)) { |
| send_authorization_request(conn); |
| return; |
| } |
| } |
| |
| /* request is authorized or does not need authorization */ |
| |
| /* 7. handle websocket requests */ |
| #if defined(USE_WEBSOCKET) |
| if (is_websocket_request) { |
| handle_websocket_request(conn, path, is_script_resource); |
| return; |
| } |
| #endif |
| |
| /* 8. check if there are request handlers for this path */ |
| if (conn->ctx->request_handlers != NULL && use_request_handler(conn)) { |
| /* Do nothing, callback has served the request */ |
| return; |
| } |
| |
| #if defined(NO_FILES) |
| /* 9a. In case the server uses only callbacks, this uri is unknown. |
| Then, all request handling ends here. */ |
| send_http_error(conn, 404, NULL, "%s", "Not Found"); |
| |
| #else |
| /* 9b. This request is either for a static file or resource handled |
| by a script file. Thus, a DOCUMENT_ROOT must exist. */ |
| if (conn->ctx->config[DOCUMENT_ROOT] == NULL) { |
| send_http_error(conn, 404, NULL, "%s", "Not Found"); |
| return; |
| } |
| |
| /* 10. File is handled by a script. */ |
| if (is_script_resource) { |
| handle_file_based_request(conn, path, &file); |
| return; |
| } |
| |
| /* 11. Handle put/delete/mkcol requests */ |
| if (is_put_or_delete_request) { |
| /* 11.1. PUT method */ |
| if (!strcmp(ri->request_method, "PUT")) { |
| put_file(conn, path); |
| return; |
| } |
| /* 11.2. DELETE method */ |
| if (!strcmp(ri->request_method, "DELETE")) { |
| delete_file(conn, path); |
| return; |
| } |
| /* 11.3. MKCOL method */ |
| if (!strcmp(ri->request_method, "MKCOL")) { |
| mkcol(conn, path); |
| return; |
| } |
| /* 11.4. should never reach this point */ |
| send_http_error(conn, 405, NULL, |
| "%s method not allowed", conn->request_info.request_method); |
| return; |
| } |
| |
| /* 11. File does not exist, or it was configured that it should be hidden */ |
| if (((file.membuf == NULL) && (file.modification_time == (time_t) 0)) || |
| (must_hide_file(conn, path))) { |
| send_http_error(conn, 404, NULL, "%s", "Not found"); |
| return; |
| } |
| |
| /* 12. Directories uris should end with a slash */ |
| if (file.is_directory && ri->uri[uri_len - 1] != '/') { |
| gmt_time_string(date, sizeof(date), &curtime); |
| mg_printf(conn, "HTTP/1.1 301 Moved Permanently\r\n" |
| "Location: %s/\r\n" |
| "Date: %s\r\n" |
| "Content-Length: 0\r\n" |
| "Connection: %s\r\n\r\n", |
| ri->uri, date, suggest_connection_header(conn)); |
| return; |
| } |
| |
| /* 13. Handle other methods than GET/HEAD */ |
| /* 13.1. Handle PROPFIND */ |
| if (!strcmp(ri->request_method, "PROPFIND")) { |
| handle_propfind(conn, path, &file); |
| return; |
| } |
| /* 13.2. Handle OPTIONS for files */ |
| if (!strcmp(ri->request_method, "OPTIONS")) { |
| /* This standard handler is only used for real files. |
| Scripts should support the OPTIONS method themselves, to allow a maximum flexibility. |
| Lua and CGI scripts may fully support CORS this way (including preflights). */ |
| send_options(conn); |
| return; |
| } |
| /* 13.3. everything but GET and HEAD (e.g. POST) */ |
| if (0!=strcmp(ri->request_method, "GET") && |
| 0!=strcmp(ri->request_method, "HEAD")) { |
| send_http_error(conn, 405, NULL, |
| "%s method not allowed", conn->request_info.request_method); |
| return; |
| } |
| |
| /* 14. directories */ |
| if (file.is_directory) { |
| if (substitute_index_file(conn, path, sizeof(path), &file)) { |
| /* 14.1. use a substitute file */ |
| /* TODO: substitute index may be a script resource. |
| define what should be possible in this case. */ |
| } else { |
| /* 14.2. no substitute file */ |
| if (!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes")) { |
| handle_directory_request(conn, path); |
| } else { |
| send_http_error(conn, 403, NULL, "%s", |
| "Error: Directory listing denied"); |
| } |
| return; |
| } |
| } |
| |
| handle_file_based_request(conn, path, &file); |
| #endif /* !defined(NO_FILES) */ |
| |
| #if 0 |
| /* Perform redirect and auth checks before calling begin_request() handler. |
| Otherwise, begin_request() would need to perform auth checks and |
| redirects. */ |
| #endif |
| } |
| |
| static void handle_file_based_request(struct mg_connection *conn, const char *path, struct file *file) |
| { |
| if (0) { |
| #ifdef USE_LUA |
| } else if (match_prefix(conn->ctx->config[LUA_SERVER_PAGE_EXTENSIONS], |
| (int)strlen(conn->ctx->config[LUA_SERVER_PAGE_EXTENSIONS]), |
| path) > 0) { |
| /* Lua server page: an SSI like page containing mostly plain html code plus some tags with server generated contents. */ |
| handle_lsp_request(conn, path, file, NULL); |
| } else if (match_prefix(conn->ctx->config[LUA_SCRIPT_EXTENSIONS], |
| (int)strlen(conn->ctx->config[LUA_SCRIPT_EXTENSIONS]), |
| path) > 0) { |
| /* Lua in-server module script: a CGI like script used to generate the entire reply. */ |
| mg_exec_lua_script(conn, path, NULL); |
| #endif |
| #if !defined(NO_CGI) |
| } else if (match_prefix(conn->ctx->config[CGI_EXTENSIONS], |
| (int)strlen(conn->ctx->config[CGI_EXTENSIONS]), |
| path) > 0) { |
| /* CGI scripts may support all HTTP methods */ |
| handle_cgi_request(conn, path); |
| #endif /* !NO_CGI */ |
| } else if (match_prefix(conn->ctx->config[SSI_EXTENSIONS], |
| (int)strlen(conn->ctx->config[SSI_EXTENSIONS]), |
| path) > 0) { |
| handle_ssi_file_request(conn, path, file); |
| } else if ((!conn->in_error_handler) && is_not_modified(conn, file)) { |
| /* Send 304 "Not Modified" - this must not send any body data */ |
| send_http_error(conn, 304, NULL, "%s", ""); |
| } else { |
| handle_static_file_request(conn, path, file); |
| } |
| } |
| |
| static void close_all_listening_sockets(struct mg_context *ctx) |
| { |
| int i; |
| for (i = 0; i < ctx->num_listening_sockets; i++) { |
| closesocket(ctx->listening_sockets[i].sock); |
| ctx->listening_sockets[i].sock = INVALID_SOCKET; |
| } |
| mg_free(ctx->listening_sockets); |
| ctx->listening_sockets = NULL; |
| mg_free(ctx->listening_ports); |
| ctx->listening_ports = NULL; |
| } |
| |
| static int is_valid_port(unsigned int port) |
| { |
| return port < 0xffff; |
| } |
| |
| /* Valid listening port specification is: [ip_address:]port[s] |
| Examples: 80, 443s, 127.0.0.1:3128, 1.2.3.4:8080s |
| TODO(lsm): add parsing of the IPv6 address */ |
| static int parse_port_string(const struct vec *vec, struct socket *so) |
| { |
| unsigned int a, b, c, d, port; |
| int ch, len; |
| #if defined(USE_IPV6) |
| char buf[100]={0}; |
| #endif |
| |
| /* MacOS needs that. If we do not zero it, subsequent bind() will fail. |
| Also, all-zeroes in the socket address means binding to all addresses |
| for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT). */ |
| memset(so, 0, sizeof(*so)); |
| so->lsa.sin.sin_family = AF_INET; |
| |
| if (sscanf(vec->ptr, "%u.%u.%u.%u:%u%n", &a, &b, &c, &d, &port, &len) == 5) { |
| /* Bind to a specific IPv4 address, e.g. 192.168.1.5:8080 */ |
| so->lsa.sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d); |
| so->lsa.sin.sin_port = htons((uint16_t) port); |
| #if defined(USE_IPV6) |
| } else if (sscanf(vec->ptr, "[%49[^]]]:%u%n", buf, &port, &len) == 2 && |
| inet_pton(AF_INET6, buf, &so->lsa.sin6.sin6_addr)) { |
| /* IPv6 address, e.g. [3ffe:2a00:100:7031::1]:8080 */ |
| so->lsa.sin6.sin6_family = AF_INET6; |
| so->lsa.sin6.sin6_port = htons((uint16_t) port); |
| #endif |
| } else if (sscanf(vec->ptr, "%u%n", &port, &len) == 1) { |
| /* If only port is specified, bind to IPv4, INADDR_ANY */ |
| so->lsa.sin.sin_port = htons((uint16_t) port); |
| } else { |
| port = len = 0; /* Parsing failure. Make port invalid. */ |
| } |
| |
| assert((len>=0) && ((unsigned)len<=(unsigned)vec->len)); /* sscanf and the option splitting code ensure this condition */ |
| ch = vec->ptr[len]; /* Next character after the port number */ |
| so->is_ssl = (ch == 's'); |
| so->ssl_redir = (ch == 'r'); |
| |
| /* Make sure the port is valid and vector ends with 's', 'r' or ',' */ |
| return is_valid_port(port) && |
| (ch == '\0' || ch == 's' || ch == 'r' || ch == ','); |
| } |
| |
| static int set_ports_option(struct mg_context *ctx) |
| { |
| const char *list = ctx->config[LISTENING_PORTS]; |
| int on = 1, success = 1; |
| #if defined(USE_IPV6) |
| int off = 0; |
| #endif |
| struct vec vec; |
| struct socket so, *ptr; |
| |
| in_port_t *portPtr; |
| union usa usa; |
| socklen_t len; |
| |
| memset(&so, 0, sizeof(so)); |
| memset(&usa, 0, sizeof(usa)); |
| len = sizeof(usa); |
| |
| while (success && (list = next_option(list, &vec, NULL)) != NULL) { |
| if (!parse_port_string(&vec, &so)) { |
| mg_cry(fc(ctx), "%s: %.*s: invalid port spec. Expecting list of: %s", |
| __func__, (int) vec.len, vec.ptr, "[IP_ADDRESS:]PORT[s|r]"); |
| success = 0; |
| } else if (so.is_ssl && ctx->ssl_ctx == NULL) { |
| mg_cry(fc(ctx), "Cannot add SSL socket, is -ssl_certificate option set?"); |
| success = 0; |
| } else if ((so.sock = socket(so.lsa.sa.sa_family, SOCK_STREAM, 6)) == |
| INVALID_SOCKET || |
| /* On Windows, SO_REUSEADDR is recommended only for |
| broadcast UDP sockets */ |
| setsockopt(so.sock, SOL_SOCKET, SO_REUSEADDR, (SOCK_OPT_TYPE) &on, sizeof(on)) != 0 || |
| #if defined(USE_IPV6) |
| (so.lsa.sa.sa_family == AF_INET6 && |
| setsockopt(so.sock, IPPROTO_IPV6, IPV6_V6ONLY, (void *) &off, |
| sizeof(off)) != 0) || |
| #endif |
| bind(so.sock, &so.lsa.sa, so.lsa.sa.sa_family == AF_INET ? |
| sizeof(so.lsa.sin) : sizeof(so.lsa)) != 0 || |
| listen(so.sock, SOMAXCONN) != 0 || |
| getsockname(so.sock, &(usa.sa), &len) != 0) { |
| mg_cry(fc(ctx), "%s: cannot bind to %.*s: %d (%s)", __func__, |
| (int) vec.len, vec.ptr, ERRNO, strerror(errno)); |
| if (so.sock != INVALID_SOCKET) { |
| closesocket(so.sock); |
| so.sock = INVALID_SOCKET; |
| } |
| success = 0; |
| } else if ((ptr = (struct socket *) mg_realloc(ctx->listening_sockets, |
| (ctx->num_listening_sockets + 1) * |
| sizeof(ctx->listening_sockets[0]))) == NULL) { |
| closesocket(so.sock); |
| so.sock = INVALID_SOCKET; |
| success = 0; |
| } else if ((portPtr = (in_port_t*) mg_realloc(ctx->listening_ports, |
| (ctx->num_listening_sockets + 1) * |
| sizeof(ctx->listening_ports[0]))) == NULL) { |
| closesocket(so.sock); |
| so.sock = INVALID_SOCKET; |
| mg_free(ptr); |
| success = 0; |
| } |
| else { |
| set_close_on_exec(so.sock, fc(ctx)); |
| ctx->listening_sockets = ptr; |
| ctx->listening_sockets[ctx->num_listening_sockets] = so; |
| ctx->listening_ports = portPtr; |
| ctx->listening_ports[ctx->num_listening_sockets] = ntohs(usa.sin.sin_port); |
| ctx->num_listening_sockets++; |
| } |
| } |
| |
| if (!success) { |
| close_all_listening_sockets(ctx); |
| } |
| |
| return success; |
| } |
| |
| static void log_header(const struct mg_connection *conn, const char *header, |
| FILE *fp) |
| { |
| const char *header_value; |
| |
| if ((header_value = mg_get_header(conn, header)) == NULL) { |
| (void) fprintf(fp, "%s", " -"); |
| } else { |
| (void) fprintf(fp, " \"%s\"", header_value); |
| } |
| } |
| |
| static void log_access(const struct mg_connection *conn) |
| { |
| const struct mg_request_info *ri; |
| FILE *fp; |
| char date[64], src_addr[IP_ADDR_STR_LEN]; |
| struct tm *tm; |
| |
| fp = conn->ctx->config[ACCESS_LOG_FILE] == NULL ? NULL : |
| fopen(conn->ctx->config[ACCESS_LOG_FILE], "a+"); |
| |
| if (fp == NULL) |
| return; |
| |
| tm = localtime(&conn->birth_time); |
| if (tm != NULL) { |
| strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z", tm); |
| } else { |
| mg_strlcpy(date, "01/Jan/1970:00:00:00 +0000", sizeof(date)); |
| date[sizeof(date) - 1] = '\0'; |
| } |
| |
| ri = &conn->request_info; |
| flockfile(fp); |
| |
| sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa); |
| fprintf(fp, "%s - %s [%s] \"%s %s HTTP/%s\" %d %" INT64_FMT, |
| src_addr, ri->remote_user == NULL ? "-" : ri->remote_user, date, |
| ri->request_method ? ri->request_method : "-", |
| ri->uri ? ri->uri : "-", ri->http_version, |
| conn->status_code, conn->num_bytes_sent); |
| log_header(conn, "Referer", fp); |
| log_header(conn, "User-Agent", fp); |
| fputc('\n', fp); |
| fflush(fp); |
| |
| funlockfile(fp); |
| fclose(fp); |
| } |
| |
| /* Verify given socket address against the ACL. |
| Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed. */ |
| static int check_acl(struct mg_context *ctx, uint32_t remote_ip) |
| { |
| int allowed, flag; |
| uint32_t net, mask; |
| struct vec vec; |
| const char *list = ctx->config[ACCESS_CONTROL_LIST]; |
| |
| /* If any ACL is set, deny by default */ |
| allowed = list == NULL ? '+' : '-'; |
| |
| while ((list = next_option(list, &vec, NULL)) != NULL) { |
| flag = vec.ptr[0]; |
| if ((flag != '+' && flag != '-') || |
| parse_net(&vec.ptr[1], &net, &mask) == 0) { |
| mg_cry(fc(ctx), "%s: subnet must be [+|-]x.x.x.x[/x]", __func__); |
| return -1; |
| } |
| |
| if (net == (remote_ip & mask)) { |
| allowed = flag; |
| } |
| } |
| |
| return allowed == '+'; |
| } |
| |
| #if !defined(_WIN32) |
| static int set_uid_option(struct mg_context *ctx) |
| { |
| struct passwd *pw; |
| const char *uid = ctx->config[RUN_AS_USER]; |
| int success = 0; |
| |
| if (uid == NULL) { |
| success = 1; |
| } else { |
| if ((pw = getpwnam(uid)) == NULL) { |
| mg_cry(fc(ctx), "%s: unknown user [%s]", __func__, uid); |
| } else if (setgid(pw->pw_gid) == -1) { |
| mg_cry(fc(ctx), "%s: setgid(%s): %s", __func__, uid, strerror(errno)); |
| } else if (setuid(pw->pw_uid) == -1) { |
| mg_cry(fc(ctx), "%s: setuid(%s): %s", __func__, uid, strerror(errno)); |
| } else { |
| success = 1; |
| } |
| } |
| |
| return success; |
| } |
| #endif /* !_WIN32 */ |
| |
| #if !defined(NO_SSL) |
| static pthread_mutex_t *ssl_mutexes; |
| |
| static int sslize(struct mg_connection *conn, SSL_CTX *s, int (*func)(SSL *)) |
| { |
| return (conn->ssl = SSL_new(s)) != NULL && |
| SSL_set_fd(conn->ssl, conn->client.sock) == 1 && |
| func(conn->ssl) == 1; |
| } |
| |
| /* Return OpenSSL error message (from CRYPTO lib) */ |
| static const char *ssl_error(void) |
| { |
| unsigned long err; |
| err = ERR_get_error(); |
| return err == 0 ? "" : ERR_error_string(err, NULL); |
| } |
| |
| static void ssl_locking_callback(int mode, int mutex_num, const char *file, |
| int line) |
| { |
| (void) line; |
| (void) file; |
| |
| if (mode & 1) { /* 1 is CRYPTO_LOCK */ |
| (void) pthread_mutex_lock(&ssl_mutexes[mutex_num]); |
| } else { |
| (void) pthread_mutex_unlock(&ssl_mutexes[mutex_num]); |
| } |
| } |
| |
| static unsigned long ssl_id_callback(void) |
| { |
| return (unsigned long) pthread_self(); |
| } |
| |
| #if !defined(NO_SSL_DL) |
| static void *load_dll(struct mg_context *ctx, const char *dll_name, |
| struct ssl_func *sw) |
| { |
| union { |
| void *p; |
| void (*fp)(void); |
| } u; |
| void *dll_handle; |
| struct ssl_func *fp; |
| |
| if ((dll_handle = dlopen(dll_name, RTLD_LAZY)) == NULL) { |
| mg_cry(fc(ctx), "%s: cannot load %s", __func__, dll_name); |
| return NULL; |
| } |
| |
| for (fp = sw; fp->name != NULL; fp++) { |
| #ifdef _WIN32 |
| /* GetProcAddress() returns pointer to function */ |
| u.fp = (void (*)(void)) dlsym(dll_handle, fp->name); |
| #else |
| /* dlsym() on UNIX returns void *. ISO C forbids casts of data |
| pointers to function pointers. We need to use a union to make a |
| cast. */ |
| u.p = dlsym(dll_handle, fp->name); |
| #endif /* _WIN32 */ |
| if (u.fp == NULL) { |
| mg_cry(fc(ctx), "%s: %s: cannot find %s", __func__, dll_name, fp->name); |
| dlclose(dll_handle); |
| return NULL; |
| } else { |
| fp->ptr = u.fp; |
| } |
| } |
| |
| return dll_handle; |
| } |
| |
| static void *ssllib_dll_handle; /* Store the ssl library handle. */ |
| static void *cryptolib_dll_handle; /* Store the crypto library handle. */ |
| |
| #endif /* NO_SSL_DL */ |
| |
| #if defined(SSL_ALREADY_INITIALIZED) |
| static int cryptolib_users = 1; /* Reference counter for crypto library. */ |
| #else |
| static int cryptolib_users = 0; /* Reference counter for crypto library. */ |
| #endif |
| |
| static int initialize_ssl(struct mg_context *ctx) |
| { |
| int i, size; |
| |
| #if !defined(NO_SSL_DL) |
| if (!cryptolib_dll_handle) { |
| cryptolib_dll_handle = load_dll(ctx, CRYPTO_LIB, crypto_sw); |
| if (!cryptolib_dll_handle) { |
| return 0; |
| } |
| } |
| #endif /* NO_SSL_DL */ |
| |
| if (mg_atomic_inc(&cryptolib_users)>1) return 1; |
| |
| /* Initialize locking callbacks, needed for thread safety. |
| http://www.openssl.org/support/faq.html#PROG1 */ |
| size = sizeof(pthread_mutex_t) * CRYPTO_num_locks(); |
| if ((ssl_mutexes = (pthread_mutex_t *) mg_malloc((size_t)size)) == NULL) { |
| mg_cry(fc(ctx), "%s: cannot allocate mutexes: %s", __func__, ssl_error()); |
| return 0; |
| } |
| |
| for (i = 0; i < CRYPTO_num_locks(); i++) { |
| pthread_mutex_init(&ssl_mutexes[i], NULL); |
| } |
| |
| CRYPTO_set_locking_callback(&ssl_locking_callback); |
| CRYPTO_set_id_callback(&ssl_id_callback); |
| |
| return 1; |
| } |
| |
| /* Dynamically load SSL library. Set up ctx->ssl_ctx pointer. */ |
| static int set_ssl_option(struct mg_context *ctx) |
| { |
| const char *pem; |
| int callback_ret; |
| |
| /* If PEM file is not specified and the init_ssl callback |
| is not specified, skip SSL initialization. */ |
| if ((pem = ctx->config[SSL_CERTIFICATE]) == NULL && |
| ctx->callbacks.init_ssl == NULL) { |
| return 1; |
| } |
| |
| if (!initialize_ssl(ctx)) { |
| return 0; |
| } |
| |
| #if !defined(NO_SSL_DL) |
| if (!ssllib_dll_handle) { |
| ssllib_dll_handle = load_dll(ctx, SSL_LIB, ssl_sw); |
| if (!ssllib_dll_handle) { |
| return 0; |
| } |
| } |
| #endif /* NO_SSL_DL */ |
| |
| /* Initialize SSL library */ |
| SSL_library_init(); |
| SSL_load_error_strings(); |
| |
| if ((ctx->ssl_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL) { |
| mg_cry(fc(ctx), "SSL_CTX_new (server) error: %s", ssl_error()); |
| return 0; |
| } |
| |
| /* If a callback has been specified, call it. */ |
| callback_ret = (ctx->callbacks.init_ssl == NULL) ? 0 : (ctx->callbacks.init_ssl(ctx->ssl_ctx, ctx->user_data)); |
| |
| /* If callback returns 0, civetweb sets up the SSL certificate. |
| If it returns 1, civetweb assumes the calback already did this. |
| If it returns -1, initializing ssl fails. */ |
| if (callback_ret < 0) { |
| mg_cry(fc(ctx), "SSL callback returned error: %i", callback_ret); |
| return 0; |
| } |
| if (callback_ret == 0) { |
| if (pem != NULL) { |
| if ((SSL_CTX_use_certificate_file(ctx->ssl_ctx, pem, 1) == 0) || (SSL_CTX_use_PrivateKey_file(ctx->ssl_ctx, pem, 1) == 0)) { |
| mg_cry(fc(ctx), "%s: cannot open %s: %s", __func__, pem, ssl_error()); |
| return 0; |
| } |
| } |
| } |
| |
| if (pem != NULL) { |
| (void) SSL_CTX_use_certificate_chain_file(ctx->ssl_ctx, pem); |
| } |
| |
| return 1; |
| } |
| |
| static void uninitialize_ssl(struct mg_context *ctx) |
| { |
| int i; |
| (void)ctx; |
| |
| if (mg_atomic_dec(&cryptolib_users)==0) { |
| CRYPTO_set_locking_callback(NULL); |
| for (i = 0; i < CRYPTO_num_locks(); i++) { |
| pthread_mutex_destroy(&ssl_mutexes[i]); |
| } |
| CRYPTO_set_locking_callback(NULL); |
| CRYPTO_set_id_callback(NULL); |
| } |
| } |
| #endif /* !NO_SSL */ |
| |
| static int set_gpass_option(struct mg_context *ctx) |
| { |
| struct file file = STRUCT_FILE_INITIALIZER; |
| const char *path = ctx->config[GLOBAL_PASSWORDS_FILE]; |
| if (path != NULL && !mg_stat(fc(ctx), path, &file)) { |
| mg_cry(fc(ctx), "Cannot open %s: %s", path, strerror(ERRNO)); |
| return 0; |
| } |
| return 1; |
| } |
| |
| static int set_acl_option(struct mg_context *ctx) |
| { |
| return check_acl(ctx, (uint32_t) 0x7f000001UL) != -1; |
| } |
| |
| static void reset_per_request_attributes(struct mg_connection *conn) |
| { |
| conn->path_info = NULL; |
| conn->num_bytes_sent = conn->consumed_content = 0; |
| conn->status_code = -1; |
| conn->must_close = conn->request_len = conn->throttle = 0; |
| conn->request_info.content_length = -1; |
| conn->data_len = 0; |
| } |
| |
| static void close_socket_gracefully(struct mg_connection *conn) |
| { |
| #if defined(_WIN32) |
| char buf[MG_BUF_LEN]; |
| int n; |
| #endif |
| struct linger linger; |
| |
| /* Set linger option to avoid socket hanging out after close. This prevent |
| ephemeral port exhaust problem under high QPS. */ |
| linger.l_onoff = 1; |
| linger.l_linger = 1; |
| if (setsockopt(conn->client.sock, SOL_SOCKET, SO_LINGER, |
| (char *) &linger, sizeof(linger)) != 0) { |
| mg_cry(conn, "%s: setsockopt(SOL_SOCKET SO_LINGER) failed: %s", |
| __func__, strerror(ERRNO)); |
| } |
| |
| /* Send FIN to the client */ |
| shutdown(conn->client.sock, SHUT_WR); |
| set_non_blocking_mode(conn->client.sock); |
| |
| #if defined(_WIN32) |
| /* Read and discard pending incoming data. If we do not do that and close |
| the socket, the data in the send buffer may be discarded. This |
| behaviour is seen on Windows, when client keeps sending data |
| when server decides to close the connection; then when client |
| does recv() it gets no data back. */ |
| do { |
| n = pull(NULL, conn, buf, sizeof(buf)); |
| } while (n > 0); |
| #endif |
| |
| /* Now we know that our FIN is ACK-ed, safe to close */ |
| closesocket(conn->client.sock); |
| conn->client.sock = INVALID_SOCKET; |
| } |
| |
| static void close_connection(struct mg_connection *conn) |
| { |
| #if defined(USE_LUA) && defined(USE_WEBSOCKET) |
| if (conn->lua_websocket_state) { |
| lua_websocket_close(conn, conn->lua_websocket_state); |
| conn->lua_websocket_state = NULL; |
| } |
| #endif |
| |
| /* call the connection_close callback if assigned */ |
| if ((conn->ctx->callbacks.connection_close != NULL) && (conn->ctx->context_type == 1)) { |
| conn->ctx->callbacks.connection_close(conn); |
| } |
| |
| mg_lock_connection(conn); |
| |
| conn->must_close = 1; |
| |
| #ifndef NO_SSL |
| if (conn->ssl != NULL) { |
| /* Run SSL_shutdown twice to ensure completly close SSL connection */ |
| SSL_shutdown(conn->ssl); |
| SSL_free(conn->ssl); |
| conn->ssl = NULL; |
| } |
| #endif |
| if (conn->client.sock != INVALID_SOCKET) { |
| close_socket_gracefully(conn); |
| conn->client.sock = INVALID_SOCKET; |
| } |
| |
| mg_unlock_connection(conn); |
| } |
| |
| void mg_close_connection(struct mg_connection *conn) |
| { |
| struct mg_context * client_ctx = NULL; |
| int i; |
| |
| if (conn->ctx->context_type == 2) { |
| client_ctx = conn->ctx; |
| /* client context: loops must end */ |
| conn->ctx->stop_flag = 1; |
| } |
| |
| #ifndef NO_SSL |
| if (conn->client_ssl_ctx != NULL) { |
| SSL_CTX_free((SSL_CTX *) conn->client_ssl_ctx); |
| } |
| #endif |
| close_connection(conn); |
| if (client_ctx != NULL) { |
| /* join worker thread and free context */ |
| for (i = 0; i < client_ctx->workerthreadcount; i++) { |
| mg_join_thread(client_ctx->workerthreadids[i]); |
| } |
| mg_free(client_ctx->workerthreadids); |
| mg_free(client_ctx); |
| } |
| (void) pthread_mutex_destroy(&conn->mutex); |
| mg_free(conn); |
| } |
| |
| struct mg_connection *mg_connect_client(const char *host, int port, int use_ssl, |
| char *ebuf, size_t ebuf_len) |
| { |
| static struct mg_context fake_ctx; |
| struct mg_connection *conn = NULL; |
| SOCKET sock; |
| |
| if ((sock = conn2(&fake_ctx, host, port, use_ssl, ebuf, |
| ebuf_len)) == INVALID_SOCKET) { |
| } else if ((conn = (struct mg_connection *) |
| mg_calloc(1, sizeof(*conn) + MAX_REQUEST_SIZE)) == NULL) { |
| snprintf(ebuf, ebuf_len, "calloc(): %s", strerror(ERRNO)); |
| closesocket(sock); |
| #ifndef NO_SSL |
| } else if (use_ssl && (conn->client_ssl_ctx = |
| SSL_CTX_new(SSLv23_client_method())) == NULL) { |
| snprintf(ebuf, ebuf_len, "SSL_CTX_new error"); |
| closesocket(sock); |
| mg_free(conn); |
| conn = NULL; |
| #endif /* NO_SSL */ |
| } else { |
| socklen_t len = sizeof(struct sockaddr); |
| conn->buf_size = MAX_REQUEST_SIZE; |
| conn->buf = (char *) (conn + 1); |
| conn->ctx = &fake_ctx; |
| conn->client.sock = sock; |
| if (getsockname(sock, &conn->client.rsa.sa, &len) != 0) { |
| mg_cry(conn, "%s: getsockname() failed: %s", |
| __func__, strerror(ERRNO)); |
| } |
| conn->client.is_ssl = use_ssl; |
| (void) pthread_mutex_init(&conn->mutex, NULL); |
| #ifndef NO_SSL |
| if (use_ssl) { |
| /* SSL_CTX_set_verify call is needed to switch off server |
| certificate checking, which is off by default in OpenSSL and on |
| in yaSSL. */ |
| SSL_CTX_set_verify(conn->client_ssl_ctx, 0, 0); |
| sslize(conn, conn->client_ssl_ctx, SSL_connect); |
| } |
| #endif |
| } |
| |
| return conn; |
| } |
| |
| static int is_valid_uri(const char *uri) |
| { |
| /* Conform to |
| http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2 |
| URI can be an asterisk (*) or should start with slash. */ |
| return uri[0] == '/' || (uri[0] == '*' && uri[1] == '\0'); |
| } |
| |
| static int getreq(struct mg_connection *conn, char *ebuf, size_t ebuf_len, int timeout) |
| { |
| const char *cl; |
| struct pollfd pfd; |
| |
| reset_per_request_attributes(conn); |
| if (timeout >= 0) { |
| pfd.fd = conn->client.sock; |
| switch (poll(&pfd, 1, timeout)) { |
| case 0: |
| snprintf(ebuf, ebuf_len, "%s", "Timed out"); |
| return 0; |
| case -1: |
| snprintf(ebuf, ebuf_len, "%s", "Interrupted"); |
| return 0; |
| } |
| } |
| |
| ebuf[0] = '\0'; |
| conn->request_len = read_request(NULL, conn, conn->buf, conn->buf_size, |
| &conn->data_len); |
| assert(conn->request_len < 0 || conn->data_len >= conn->request_len); |
| |
| if (conn->request_len == 0 && conn->data_len == conn->buf_size) { |
| snprintf(ebuf, ebuf_len, "%s", "Request Too Large"); |
| } else if (conn->request_len <= 0) { |
| snprintf(ebuf, ebuf_len, "%s", "Client sent malformed request"); |
| } else if (parse_http_message(conn->buf, conn->buf_size, |
| &conn->request_info) <= 0) { |
| snprintf(ebuf, ebuf_len, "Bad request: [%.*s]", conn->data_len, conn->buf); |
| } else { |
| /* Message is a valid request or response */ |
| if ((cl = get_header(&conn->request_info, "Content-Length")) != NULL) { |
| /* Request/response has content length set */ |
| conn->content_len = strtoll(cl, NULL, 10); |
| /* Publish the content length back to the request info. */ |
| conn->request_info.content_length = conn->content_len; |
| } else if (!mg_strcasecmp(conn->request_info.request_method, "POST") || |
| !mg_strcasecmp(conn->request_info.request_method, "PUT")) { |
| /* POST or PUT request without content length set */ |
| conn->content_len = -1; |
| } else if (!mg_strncasecmp(conn->request_info.request_method, "HTTP/", 5)) { |
| /* Response without content length set */ |
| conn->content_len = -1; |
| } else { |
| /* Other request */ |
| conn->content_len = 0; |
| } |
| conn->birth_time = time(NULL); |
| } |
| return ebuf[0] == '\0'; |
| } |
| |
| int mg_get_response(struct mg_connection *conn, char *ebuf, size_t ebuf_len, int timeout) |
| { |
| /* Implementation of API function for HTTP clients */ |
| /* TODO: Define proper return values - maybe return length? |
| For the first test use <0 for error and >0 for OK */ |
| return (getreq(conn, ebuf, ebuf_len, timeout) == 0) ? -1 : +1; |
| } |
| |
| struct mg_connection *mg_download(const char *host, int port, int use_ssl, |
| char *ebuf, size_t ebuf_len, |
| const char *fmt, ...) |
| { |
| struct mg_connection *conn; |
| va_list ap; |
| int i; |
| |
| va_start(ap, fmt); |
| ebuf[0] = '\0'; |
| |
| /* open a connection */ |
| conn = mg_connect_client(host, port, use_ssl, ebuf, ebuf_len); |
| |
| if (conn != NULL) { |
| i = mg_vprintf(conn, fmt, ap); |
| if (i <= 0) { |
| snprintf(ebuf, ebuf_len, "%s", "Error sending request"); |
| } else { |
| getreq(conn, ebuf, ebuf_len, TIMEOUT_INFINITE); |
| } |
| } |
| |
| /* if an error occured, close the connection */ |
| if (ebuf[0] != '\0' && conn != NULL) { |
| mg_close_connection(conn); |
| conn = NULL; |
| } |
| |
| va_end(ap); |
| return conn; |
| } |
| |
| #if defined(USE_WEBSOCKET) |
| #ifdef _WIN32 |
| static unsigned __stdcall websocket_client_thread(void *data) |
| #else |
| static void* websocket_client_thread(void *data) |
| #endif |
| { |
| struct mg_connection* conn = (struct mg_connection*)data; |
| read_websocket(conn); |
| |
| DEBUG_TRACE("%s", "Websocket client thread exited\n"); |
| |
| if (conn->ctx->callbacks.connection_close != NULL) { |
| conn->ctx->callbacks.connection_close(conn); |
| } |
| |
| #ifdef _WIN32 |
| return 0; |
| #else |
| return NULL; |
| #endif |
| } |
| #endif |
| |
| struct mg_connection *mg_connect_websocket_client(const char *host, int port, int use_ssl, |
| char *error_buffer, size_t error_buffer_size, |
| const char *path, const char *origin, |
| websocket_data_func data_func, websocket_close_func close_func, |
| void * user_data) |
| { |
| struct mg_connection* conn = NULL; |
| |
| #if defined(USE_WEBSOCKET) |
| struct mg_context * newctx = NULL; |
| static const char *magic = "x3JJHMbDL1EzLkh9GBhXDw=="; |
| static const char *handshake_req; |
| |
| if(origin != NULL) |
| { |
| handshake_req = "GET %s HTTP/1.1\r\n" |
| "Host: %s\r\n" |
| "Upgrade: websocket\r\n" |
| "Connection: Upgrade\r\n" |
| "Sec-WebSocket-Key: %s\r\n" |
| "Sec-WebSocket-Version: 13\r\n" |
| "Origin: %s\r\n" |
| "\r\n"; |
| } |
| else |
| { |
| handshake_req = "GET %s HTTP/1.1\r\n" |
| "Host: %s\r\n" |
| "Upgrade: websocket\r\n" |
| "Connection: Upgrade\r\n" |
| "Sec-WebSocket-Key: %s\r\n" |
| "Sec-WebSocket-Version: 13\r\n" |
| "\r\n"; |
| } |
| |
| /* Establish the client connection and request upgrade */ |
| conn = mg_download(host, port, use_ssl, |
| error_buffer, error_buffer_size, |
| handshake_req, path, host, magic, origin); |
| |
| /* Connection object will be null if something goes wrong */ |
| if(conn == NULL || (strcmp(conn->request_info.uri, "101") != 0)) |
| { |
| DEBUG_TRACE("Websocket client connect error: %s\r\n", error_buffer); |
| if(conn != NULL) { mg_free(conn); conn = NULL; } |
| return conn; |
| } |
| |
| /* For client connections, mg_context is fake. Since we need to set a callback |
| function, we need to create a copy and modify it. */ |
| newctx = (struct mg_context *) mg_malloc(sizeof(struct mg_context)); |
| memcpy(newctx, conn->ctx, sizeof(struct mg_context)); |
| newctx->callbacks.websocket_data = data_func; /* read_websocket will automatically call it */ |
| newctx->callbacks.connection_close = close_func; |
| newctx->user_data = user_data; |
| newctx->context_type = 2; /* client context type */ |
| newctx->workerthreadcount = 1; /* one worker thread will be created */ |
| newctx->workerthreadids = (pthread_t*) mg_calloc(newctx->workerthreadcount, sizeof(pthread_t)); |
| conn->ctx = newctx; |
| |
| /* Start a thread to read the websocket client connection |
| This thread will automatically stop when mg_disconnect is |
| called on the client connection */ |
| if (mg_start_thread_with_id(websocket_client_thread, (void*)conn, newctx->workerthreadids) != 0) |
| { |
| mg_free((void*)newctx->workerthreadids); |
| mg_free((void*)newctx); |
| mg_free((void*)conn); |
| conn = NULL; |
| DEBUG_TRACE("%s", "Websocket client connect thread could not be started\r\n"); |
| } |
| #endif |
| |
| return conn; |
| } |
| |
| static void process_new_connection(struct mg_connection *conn) |
| { |
| struct mg_request_info *ri = &conn->request_info; |
| int keep_alive_enabled, keep_alive, discard_len; |
| char ebuf[100]; |
| |
| keep_alive_enabled = !strcmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes"); |
| |
| /* Important: on new connection, reset the receiving buffer. Credit goes |
| to crule42. */ |
| conn->data_len = 0; |
| do { |
| if (!getreq(conn, ebuf, sizeof(ebuf), TIMEOUT_INFINITE)) { |
| /* The request sent by the client could not be understood by the server, |
| or it was incomplete or a timeout. Send an error message and close |
| the connection. */ |
| send_http_error(conn, 400, NULL, "%s", ebuf); |
| conn->must_close = 1; |
| } else if (!is_valid_uri(conn->request_info.uri)) { |
| snprintf(ebuf, sizeof(ebuf), "Invalid URI: [%s]", ri->uri); |
| send_http_error(conn, 400, NULL, "%s", ebuf); |
| } else if (strcmp(ri->http_version, "1.0") && |
| strcmp(ri->http_version, "1.1")) { |
| snprintf(ebuf, sizeof(ebuf), "Bad HTTP version: [%s]", ri->http_version); |
| send_http_error(conn, 505, NULL, "%s", ebuf); |
| } |
| |
| if (ebuf[0] == '\0') { |
| handle_request(conn); |
| if (conn->ctx->callbacks.end_request != NULL) { |
| conn->ctx->callbacks.end_request(conn, conn->status_code); |
| } |
| log_access(conn); |
| } |
| if (ri->remote_user != NULL) { |
| mg_free((void *) ri->remote_user); |
| /* Important! When having connections with and without auth |
| would cause double free and then crash */ |
| ri->remote_user = NULL; |
| } |
| |
| /* NOTE(lsm): order is important here. should_keep_alive() call is |
| using parsed request, which will be invalid after memmove's below. |
| Therefore, memorize should_keep_alive() result now for later use |
| in loop exit condition. */ |
| keep_alive = conn->ctx->stop_flag == 0 && keep_alive_enabled && |
| conn->content_len >= 0 && should_keep_alive(conn); |
| |
| /* Discard all buffered data for this request */ |
| discard_len = conn->content_len >= 0 && conn->request_len > 0 && |
| conn->request_len + conn->content_len < (int64_t) conn->data_len ? |
| (int) (conn->request_len + conn->content_len) : conn->data_len; |
| assert(discard_len >= 0); |
| memmove(conn->buf, conn->buf + discard_len, conn->data_len - discard_len); |
| conn->data_len -= discard_len; |
| assert(conn->data_len >= 0); |
| assert(conn->data_len <= conn->buf_size); |
| } while (keep_alive); |
| } |
| |
| /* Worker threads take accepted socket from the queue */ |
| static int consume_socket(struct mg_context *ctx, struct socket *sp) |
| { |
| (void) pthread_mutex_lock(&ctx->thread_mutex); |
| DEBUG_TRACE("%s", "going idle"); |
| |
| /* If the queue is empty, wait. We're idle at this point. */ |
| while (ctx->sq_head == ctx->sq_tail && ctx->stop_flag == 0) { |
| pthread_cond_wait(&ctx->sq_full, &ctx->thread_mutex); |
| } |
| |
| /* If we're stopping, sq_head may be equal to sq_tail. */ |
| if (ctx->sq_head > ctx->sq_tail) { |
| /* Copy socket from the queue and increment tail */ |
| *sp = ctx->queue[ctx->sq_tail % ARRAY_SIZE(ctx->queue)]; |
| ctx->sq_tail++; |
| DEBUG_TRACE("grabbed socket %d, going busy", sp->sock); |
| |
| /* Wrap pointers if needed */ |
| while (ctx->sq_tail > (int) ARRAY_SIZE(ctx->queue)) { |
| ctx->sq_tail -= ARRAY_SIZE(ctx->queue); |
| ctx->sq_head -= ARRAY_SIZE(ctx->queue); |
| } |
| } |
| |
| (void) pthread_cond_signal(&ctx->sq_empty); |
| (void) pthread_mutex_unlock(&ctx->thread_mutex); |
| |
| return !ctx->stop_flag; |
| } |
| |
| static void *worker_thread_run(void *thread_func_param) |
| { |
| struct mg_context *ctx = (struct mg_context *) thread_func_param; |
| struct mg_connection *conn; |
| struct mg_workerTLS tls; |
| |
| mg_set_thread_name("worker"); |
| |
| tls.is_master = 0; |
| #if defined(_WIN32) && !defined(__SYMBIAN32__) |
| tls.pthread_cond_helper_mutex = CreateEvent(NULL, FALSE, FALSE, NULL); |
| #endif |
| |
| conn = (struct mg_connection *) mg_calloc(1, sizeof(*conn) + MAX_REQUEST_SIZE); |
| if (conn == NULL) { |
| mg_cry(fc(ctx), "%s", "Cannot create new connection struct, OOM"); |
| } else { |
| pthread_setspecific(sTlsKey, &tls); |
| conn->buf_size = MAX_REQUEST_SIZE; |
| conn->buf = (char *) (conn + 1); |
| conn->ctx = ctx; |
| conn->request_info.user_data = ctx->user_data; |
| /* Allocate a mutex for this connection to allow communication both |
| within the request handler and from elsewhere in the application */ |
| (void) pthread_mutex_init(&conn->mutex, NULL); |
| |
| /* Call consume_socket() even when ctx->stop_flag > 0, to let it |
| signal sq_empty condvar to wake up the master waiting in |
| produce_socket() */ |
| while (consume_socket(ctx, &conn->client)) { |
| conn->birth_time = time(NULL); |
| |
| /* Fill in IP, port info early so even if SSL setup below fails, |
| error handler would have the corresponding info. |
| Thanks to Johannes Winkelmann for the patch. |
| TODO(lsm): Fix IPv6 case */ |
| conn->request_info.remote_port = ntohs(conn->client.rsa.sin.sin_port); |
| sockaddr_to_string(conn->request_info.remote_addr, sizeof(conn->request_info.remote_addr), &conn->client.rsa); |
| /* TODO: #if defined(MG_LEGACY_INTERFACE) */ |
| memcpy(&conn->request_info.remote_ip, |
| &conn->client.rsa.sin.sin_addr.s_addr, 4); |
| conn->request_info.remote_ip = ntohl(conn->request_info.remote_ip); |
| /* #endif */ |
| conn->request_info.is_ssl = conn->client.is_ssl; |
| |
| if (!conn->client.is_ssl |
| #ifndef NO_SSL |
| || sslize(conn, conn->ctx->ssl_ctx, SSL_accept) |
| #endif |
| ) { |
| process_new_connection(conn); |
| } |
| |
| close_connection(conn); |
| } |
| } |
| |
| /* Signal master that we're done with connection and exiting */ |
| (void) pthread_mutex_lock(&ctx->thread_mutex); |
| ctx->num_threads--; |
| (void) pthread_cond_signal(&ctx->thread_cond); |
| assert(ctx->num_threads >= 0); |
| (void) pthread_mutex_unlock(&ctx->thread_mutex); |
| |
| pthread_setspecific(sTlsKey, NULL); |
| #if defined(_WIN32) && !defined(__SYMBIAN32__) |
| CloseHandle(tls.pthread_cond_helper_mutex); |
| #endif |
| mg_free(conn); |
| |
| DEBUG_TRACE("%s", "exiting"); |
| return NULL; |
| } |
| |
| /* Threads have different return types on Windows and Unix. */ |
| |
| #ifdef _WIN32 |
| static unsigned __stdcall worker_thread(void *thread_func_param) |
| { |
| worker_thread_run(thread_func_param); |
| return 0; |
| } |
| #else |
| static void *worker_thread(void *thread_func_param) |
| { |
| worker_thread_run(thread_func_param); |
| return NULL; |
| } |
| #endif /* _WIN32 */ |
| |
| /* Master thread adds accepted socket to a queue */ |
| static void produce_socket(struct mg_context *ctx, const struct socket *sp) |
| { |
| (void) pthread_mutex_lock(&ctx->thread_mutex); |
| |
| /* If the queue is full, wait */ |
| while (ctx->stop_flag == 0 && |
| ctx->sq_head - ctx->sq_tail >= (int) ARRAY_SIZE(ctx->queue)) { |
| (void) pthread_cond_wait(&ctx->sq_empty, &ctx->thread_mutex); |
| } |
| |
| if (ctx->sq_head - ctx->sq_tail < (int) ARRAY_SIZE(ctx->queue)) { |
| /* Copy socket to the queue and increment head */ |
| ctx->queue[ctx->sq_head % ARRAY_SIZE(ctx->queue)] = *sp; |
| ctx->sq_head++; |
| DEBUG_TRACE("queued socket %d", sp->sock); |
| } |
| |
| (void) pthread_cond_signal(&ctx->sq_full); |
| (void) pthread_mutex_unlock(&ctx->thread_mutex); |
| } |
| |
| static int set_sock_timeout(SOCKET sock, int milliseconds) |
| { |
| #ifdef _WIN32 |
| DWORD t = milliseconds; |
| #else |
| struct timeval t; |
| t.tv_sec = milliseconds / 1000; |
| t.tv_usec = (milliseconds * 1000) % 1000000; |
| #endif |
| return setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (SOCK_OPT_TYPE) &t, sizeof(t)) || |
| setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (SOCK_OPT_TYPE) &t, sizeof(t)); |
| } |
| |
| static void accept_new_connection(const struct socket *listener, |
| struct mg_context *ctx) |
| { |
| struct socket so; |
| char src_addr[IP_ADDR_STR_LEN]; |
| socklen_t len = sizeof(so.rsa); |
| int on = 1; |
| |
| if ((so.sock = accept(listener->sock, &so.rsa.sa, &len)) == INVALID_SOCKET) { |
| } else if (!check_acl(ctx, ntohl(* (uint32_t *) &so.rsa.sin.sin_addr))) { |
| sockaddr_to_string(src_addr, sizeof(src_addr), &so.rsa); |
| mg_cry(fc(ctx), "%s: %s is not allowed to connect", __func__, src_addr); |
| closesocket(so.sock); |
| so.sock = INVALID_SOCKET; |
| } else { |
| /* Put so socket structure into the queue */ |
| DEBUG_TRACE("Accepted socket %d", (int) so.sock); |
| set_close_on_exec(so.sock, fc(ctx)); |
| so.is_ssl = listener->is_ssl; |
| so.ssl_redir = listener->ssl_redir; |
| if (getsockname(so.sock, &so.lsa.sa, &len) != 0) { |
| mg_cry(fc(ctx), "%s: getsockname() failed: %s", |
| __func__, strerror(ERRNO)); |
| } |
| /* Set TCP keep-alive. This is needed because if HTTP-level keep-alive |
| is enabled, and client resets the connection, server won't get |
| TCP FIN or RST and will keep the connection open forever. With TCP |
| keep-alive, next keep-alive handshake will figure out that the |
| client is down and will close the server end. |
| Thanks to Igor Klopov who suggested the patch. */ |
| if (setsockopt(so.sock, SOL_SOCKET, SO_KEEPALIVE, (SOCK_OPT_TYPE) &on, sizeof(on)) != 0) { |
| mg_cry(fc(ctx), |
| "%s: setsockopt(SOL_SOCKET SO_KEEPALIVE) failed: %s", |
| __func__, strerror(ERRNO)); |
| } |
| set_sock_timeout(so.sock, atoi(ctx->config[REQUEST_TIMEOUT])); |
| produce_socket(ctx, &so); |
| } |
| } |
| |
| static void master_thread_run(void *thread_func_param) |
| { |
| struct mg_context *ctx = (struct mg_context *) thread_func_param; |
| struct mg_workerTLS tls; |
| struct pollfd *pfd; |
| int i; |
| int workerthreadcount; |
| |
| mg_set_thread_name("master"); |
| |
| /* Increase priority of the master thread */ |
| #if defined(_WIN32) |
| SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL); |
| #elif defined(USE_MASTER_THREAD_PRIORITY) |
| int min_prio = sched_get_priority_min(SCHED_RR); |
| int max_prio = sched_get_priority_max(SCHED_RR); |
| if ((min_prio >=0) && (max_prio >= 0) && |
| ((USE_MASTER_THREAD_PRIORITY) <= max_prio) && |
| ((USE_MASTER_THREAD_PRIORITY) >= min_prio) |
| ) { |
| struct sched_param sched_param = {0}; |
| sched_param.sched_priority = (USE_MASTER_THREAD_PRIORITY); |
| pthread_setschedparam(pthread_self(), SCHED_RR, &sched_param); |
| } |
| #endif |
| |
| /* Initialize thread local storage */ |
| #if defined(_WIN32) && !defined(__SYMBIAN32__) |
| tls.pthread_cond_helper_mutex = CreateEvent(NULL, FALSE, FALSE, NULL); |
| #endif |
| tls.is_master = 1; |
| pthread_setspecific(sTlsKey, &tls); |
| |
| /* Server starts *now* */ |
| ctx->start_time = (unsigned long)time(NULL); |
| |
| /* Allocate memory for the listening sockets, and start the server */ |
| pfd = (struct pollfd *) mg_calloc(ctx->num_listening_sockets, sizeof(pfd[0])); |
| while (pfd != NULL && ctx->stop_flag == 0) { |
| for (i = 0; i < ctx->num_listening_sockets; i++) { |
| pfd[i].fd = ctx->listening_sockets[i].sock; |
| pfd[i].events = POLLIN; |
| } |
| |
| if (poll(pfd, ctx->num_listening_sockets, 200) > 0) { |
| for (i = 0; i < ctx->num_listening_sockets; i++) { |
| /* NOTE(lsm): on QNX, poll() returns POLLRDNORM after the |
| successful poll, and POLLIN is defined as |
| (POLLRDNORM | POLLRDBAND) |
| Therefore, we're checking pfd[i].revents & POLLIN, not |
| pfd[i].revents == POLLIN. */ |
| if (ctx->stop_flag == 0 && (pfd[i].revents & POLLIN)) { |
| accept_new_connection(&ctx->listening_sockets[i], ctx); |
| } |
| } |
| } |
| } |
| mg_free(pfd); |
| DEBUG_TRACE("%s", "stopping workers"); |
| |
| /* Stop signal received: somebody called mg_stop. Quit. */ |
| close_all_listening_sockets(ctx); |
| |
| /* Wakeup workers that are waiting for connections to handle. */ |
| pthread_cond_broadcast(&ctx->sq_full); |
| |
| /* Wait until all threads finish */ |
| (void) pthread_mutex_lock(&ctx->thread_mutex); |
| while (ctx->num_threads > 0) { |
| (void) pthread_cond_wait(&ctx->thread_cond, &ctx->thread_mutex); |
| } |
| (void) pthread_mutex_unlock(&ctx->thread_mutex); |
| |
| /* Join all worker threads to avoid leaking threads. */ |
| workerthreadcount = ctx->workerthreadcount; |
| for (i = 0; i < workerthreadcount; i++) { |
| mg_join_thread(ctx->workerthreadids[i]); |
| } |
| |
| #if !defined(NO_SSL) |
| if (ctx->ssl_ctx != NULL) { |
| uninitialize_ssl(ctx); |
| } |
| #endif |
| DEBUG_TRACE("%s", "exiting"); |
| |
| #if defined(_WIN32) && !defined(__SYMBIAN32__) |
| CloseHandle(tls.pthread_cond_helper_mutex); |
| #endif |
| pthread_setspecific(sTlsKey, NULL); |
| |
| /* Signal mg_stop() that we're done. |
| WARNING: This must be the very last thing this |
| thread does, as ctx becomes invalid after this line. */ |
| ctx->stop_flag = 2; |
| } |
| |
| /* Threads have different return types on Windows and Unix. */ |
| #ifdef _WIN32 |
| static unsigned __stdcall master_thread(void *thread_func_param) |
| { |
| master_thread_run(thread_func_param); |
| return 0; |
| } |
| #else |
| static void *master_thread(void *thread_func_param) |
| { |
| master_thread_run(thread_func_param); |
| return NULL; |
| } |
| #endif /* _WIN32 */ |
| |
| static void free_context(struct mg_context *ctx) |
| { |
| int i; |
| struct mg_request_handler_info *tmp_rh; |
| |
| if (ctx == NULL) |
| return; |
| |
| if (ctx->callbacks.exit_context) { |
| ctx->callbacks.exit_context(ctx); |
| } |
| |
| /* All threads exited, no sync is needed. Destroy thread mutex and condvars */ |
| (void) pthread_mutex_destroy(&ctx->thread_mutex); |
| (void) pthread_cond_destroy(&ctx->thread_cond); |
| (void) pthread_cond_destroy(&ctx->sq_empty); |
| (void) pthread_cond_destroy(&ctx->sq_full); |
| |
| /* Destroy other context global data structures mutex */ |
| (void) pthread_mutex_destroy(&ctx->nonce_mutex); |
| |
| #if defined(USE_TIMERS) |
| timers_exit(ctx); |
| #endif |
| |
| /* Deallocate config parameters */ |
| for (i = 0; i < NUM_OPTIONS; i++) { |
| if (ctx->config[i] != NULL) |
| #ifdef WIN32 |
| #pragma warning(suppress: 6001) |
| #endif |
| mg_free(ctx->config[i]); |
| } |
| |
| /* Deallocate request handlers */ |
| while (ctx->request_handlers) { |
| tmp_rh = ctx->request_handlers; |
| ctx->request_handlers = tmp_rh->next; |
| mg_free(tmp_rh->uri); |
| mg_free(tmp_rh); |
| } |
| |
| #ifndef NO_SSL |
| /* Deallocate SSL context */ |
| if (ctx->ssl_ctx != NULL) { |
| SSL_CTX_free(ctx->ssl_ctx); |
| } |
| if (ssl_mutexes != NULL) { |
| mg_free(ssl_mutexes); |
| ssl_mutexes = NULL; |
| } |
| #endif /* !NO_SSL */ |
| |
| /* Deallocate worker thread ID array */ |
| if (ctx->workerthreadids != NULL) { |
| mg_free(ctx->workerthreadids); |
| } |
| |
| /* Deallocate the tls variable */ |
| if (mg_atomic_dec(&sTlsInit)==0) { |
| pthread_key_delete(sTlsKey); |
| } |
| |
| /* deallocate system name string */ |
| mg_free(ctx->systemName); |
| |
| /* Deallocate context itself */ |
| mg_free(ctx); |
| } |
| |
| void mg_stop(struct mg_context *ctx) |
| { |
| ctx->stop_flag = 1; |
| |
| /* Wait until mg_fini() stops */ |
| while (ctx->stop_flag != 2) { |
| (void) mg_sleep(10); |
| } |
| mg_join_thread(ctx->masterthreadid); |
| free_context(ctx); |
| |
| #if defined(_WIN32) && !defined(__SYMBIAN32__) |
| (void) WSACleanup(); |
| #endif /* _WIN32 && !__SYMBIAN32__ */ |
| } |
| |
| static void get_system_name(char **sysName) |
| { |
| #if defined(_WIN32) |
| #if !defined(__SYMBIAN32__) |
| char name[128]; |
| DWORD dwVersion = 0; |
| DWORD dwMajorVersion = 0; |
| DWORD dwMinorVersion = 0; |
| DWORD dwBuild = 0; |
| |
| dwVersion = GetVersion(); |
| |
| dwMajorVersion = (DWORD)(LOBYTE(LOWORD(dwVersion))); |
| dwMinorVersion = (DWORD)(HIBYTE(LOWORD(dwVersion))); |
| dwBuild = ((dwVersion < 0x80000000) ? (DWORD)(HIWORD(dwVersion)) : 0); |
| |
| sprintf(name, "Windows %d.%d", dwMajorVersion, dwMinorVersion); |
| *sysName = mg_strdup(name); |
| #else |
| *sysName = mg_strdup("Symbian"); |
| #endif |
| #else |
| struct utsname name; |
| memset(&name, 0, sizeof(name)); |
| uname(&name); |
| *sysName = mg_strdup(name.sysname); |
| #endif |
| } |
| |
| struct mg_context *mg_start(const struct mg_callbacks *callbacks, |
| void *user_data, |
| const char **options) |
| { |
| struct mg_context *ctx; |
| const char *name, *value, *default_value; |
| int i, ok; |
| int workerthreadcount; |
| void (*exit_callback)(struct mg_context * ctx) = 0; |
| |
| #if defined(_WIN32) && !defined(__SYMBIAN32__) |
| WSADATA data; |
| WSAStartup(MAKEWORD(2,2), &data); |
| #pragma warning(suppress: 28125) |
| if (!sTlsInit) InitializeCriticalSection(&global_log_file_lock); |
| #endif /* _WIN32 && !__SYMBIAN32__ */ |
| |
| /* Check if the config_options and the corresponding enum have compatible sizes. */ |
| /* Could use static_assert, once it is verified that all compilers support this. */ |
| assert(sizeof(config_options)/sizeof(config_options[0]) == NUM_OPTIONS+1); |
| |
| /* Allocate context and initialize reasonable general case defaults. |
| TODO(lsm): do proper error handling here. */ |
| if ((ctx = (struct mg_context *) mg_calloc(1, sizeof(*ctx))) == NULL) { |
| return NULL; |
| } |
| |
| if (mg_atomic_inc(&sTlsInit)==1) { |
| if (0 != pthread_key_create(&sTlsKey, NULL)) { |
| /* Fatal error - abort start. However, this situation should never occur in practice. */ |
| mg_atomic_dec(&sTlsInit); |
| mg_cry(fc(ctx), "Cannot initialize thread local storage"); |
| mg_free(ctx); |
| return NULL; |
| } |
| } else { |
| /* TODO: check if sTlsKey is already initialized */ |
| mg_sleep(1); |
| } |
| |
| ok = 0==pthread_mutex_init(&ctx->thread_mutex, NULL); |
| ok &= 0==pthread_cond_init(&ctx->thread_cond, NULL); |
| ok &= 0==pthread_cond_init(&ctx->sq_empty, NULL); |
| ok &= 0==pthread_cond_init(&ctx->sq_full, NULL); |
| ok &= 0==pthread_mutex_init(&ctx->nonce_mutex, NULL); |
| if (!ok) { |
| /* Fatal error - abort start. However, this situation should never occur in practice. */ |
| mg_cry(fc(ctx), "Cannot initialize thread synchronization objects"); |
| mg_free(ctx); |
| return NULL; |
| } |
| |
| if (callbacks) { |
| ctx->callbacks = *callbacks; |
| exit_callback = callbacks->exit_context; |
| ctx->callbacks.exit_context = 0; |
| } |
| ctx->user_data = user_data; |
| ctx->request_handlers = NULL; |
| |
| #if defined(USE_LUA) && defined(USE_WEBSOCKET) |
| ctx->shared_lua_websockets = 0; |
| #endif |
| |
| while (options && (name = *options++) != NULL) { |
| if ((i = get_option_index(name)) == -1) { |
| mg_cry(fc(ctx), "Invalid option: %s", name); |
| free_context(ctx); |
| return NULL; |
| } else if ((value = *options++) == NULL) { |
| mg_cry(fc(ctx), "%s: option value cannot be NULL", name); |
| free_context(ctx); |
| return NULL; |
| } |
| if (ctx->config[i] != NULL) { |
| mg_cry(fc(ctx), "warning: %s: duplicate option", name); |
| mg_free(ctx->config[i]); |
| } |
| ctx->config[i] = mg_strdup(value); |
| DEBUG_TRACE("[%s] -> [%s]", name, value); |
| } |
| |
| /* Set default value if needed */ |
| for (i = 0; config_options[i].name != NULL; i++) { |
| default_value = config_options[i].default_value; |
| if (ctx->config[i] == NULL && default_value != NULL) { |
| ctx->config[i] = mg_strdup(default_value); |
| } |
| } |
| |
| #if defined(NO_FILES) |
| if (ctx->config[DOCUMENT_ROOT] != NULL) { |
| mg_cry(fc(ctx), "%s", "Document root must not be set"); |
| free_context(ctx); |
| return NULL; |
| } |
| #endif |
| |
| get_system_name(&ctx->systemName); |
| |
| /* NOTE(lsm): order is important here. SSL certificates must |
| be initialized before listening ports. UID must be set last. */ |
| if (!set_gpass_option(ctx) || |
| #if !defined(NO_SSL) |
| !set_ssl_option(ctx) || |
| #endif |
| !set_ports_option(ctx) || |
| #if !defined(_WIN32) |
| !set_uid_option(ctx) || |
| #endif |
| !set_acl_option(ctx)) { |
| free_context(ctx); |
| return NULL; |
| } |
| |
| #if !defined(_WIN32) && !defined(__SYMBIAN32__) |
| /* Ignore SIGPIPE signal, so if browser cancels the request, it |
| won't kill the whole process. */ |
| (void) signal(SIGPIPE, SIG_IGN); |
| #endif /* !_WIN32 && !__SYMBIAN32__ */ |
| |
| workerthreadcount = atoi(ctx->config[NUM_THREADS]); |
| |
| if (workerthreadcount > MAX_WORKER_THREADS) { |
| mg_cry(fc(ctx), "Too many worker threads"); |
| free_context(ctx); |
| return NULL; |
| } |
| |
| if (workerthreadcount > 0) { |
| ctx->workerthreadcount = workerthreadcount; |
| ctx->workerthreadids = (pthread_t *)mg_calloc(workerthreadcount, sizeof(pthread_t)); |
| if (ctx->workerthreadids == NULL) { |
| mg_cry(fc(ctx), "Not enough memory for worker thread ID array"); |
| free_context(ctx); |
| return NULL; |
| } |
| } |
| |
| #if defined(USE_TIMERS) |
| if (timers_init(ctx) != 0) { |
| mg_cry(fc(ctx), "Error creating timers"); |
| free_context(ctx); |
| return NULL; |
| } |
| #endif |
| |
| /* Context has been created - init user libraries */ |
| if (ctx->callbacks.init_context) { |
| ctx->callbacks.init_context(ctx); |
| } |
| ctx->callbacks.exit_context = exit_callback; |
| ctx->context_type = 1; /* server context */ |
| |
| /* Start master (listening) thread */ |
| mg_start_thread_with_id(master_thread, ctx, &ctx->masterthreadid); |
| |
| /* Start worker threads */ |
| for (i = 0; i < workerthreadcount; i++) { |
| (void) pthread_mutex_lock(&ctx->thread_mutex); |
| ctx->num_threads++; |
| (void) pthread_mutex_unlock(&ctx->thread_mutex); |
| if (mg_start_thread_with_id(worker_thread, ctx, |
| &ctx->workerthreadids[i]) != 0) { |
| (void) pthread_mutex_lock(&ctx->thread_mutex); |
| ctx->num_threads--; |
| (void) pthread_mutex_unlock(&ctx->thread_mutex); |
| if (i>0) { |
| mg_cry(fc(ctx), "Cannot start worker thread %i: error %ld", i+1, (long) ERRNO); |
| } else { |
| mg_cry(fc(ctx), "Cannot create threads: error %ld", (long) ERRNO); |
| free_context(ctx); |
| return NULL; |
| } |
| break; |
| } |
| } |
| |
| return ctx; |
| } |