| // Some portions Copyright (c) 2004-2013 Sergey Lyubka |
| // Some portions Copyright (c) 2013 Cloudera Inc. |
| // |
| // 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. |
| |
| #ifdef __linux__ |
| #define _XOPEN_SOURCE 600 // For flockfile() on Linux |
| #endif |
| #define _LARGEFILE_SOURCE // Enable 64-bit file offsets |
| #define __STDC_FORMAT_MACROS // <inttypes.h> wants this for C++ |
| #define __STDC_LIMIT_MACROS // C++ wants that for INT64_MAX |
| |
| #ifdef __linux__ |
| #include <sys/prctl.h> |
| #endif // defined(__linux__) |
| |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <errno.h> |
| #include <signal.h> |
| #include <fcntl.h> |
| |
| #include <time.h> |
| #ifdef __MACH__ |
| #include <mach/clock.h> |
| #include <mach/mach.h> |
| #endif |
| |
| #include <stdlib.h> |
| #include <stdarg.h> |
| #include <assert.h> |
| #include <string.h> |
| #include <ctype.h> |
| #include <limits.h> |
| #include <stddef.h> |
| #include <stdio.h> |
| |
| #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 <stdint.h> |
| #include <inttypes.h> |
| #include <netdb.h> |
| |
| #include <pwd.h> |
| #include <unistd.h> |
| #include <dirent.h> |
| #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 sq_mkdir(x, y) mkdir(x, y) |
| #define sq_remove(x) remove(x) |
| #define sq_sleep(x) usleep((x) * 1000) |
| #define ERRNO errno |
| #define INVALID_SOCKET (-1) |
| #define INT64_FMT PRId64 |
| typedef int SOCKET; |
| |
| #include "squeasel.h" |
| |
| #define SQUEASEL_VERSION "3.9" |
| #define PASSWORDS_FILE_NAME ".htpasswd" |
| #define CGI_ENVIRONMENT_SIZE 4096 |
| #define MAX_CGI_ENVIR_VARS 64 |
| #define SQ_BUF_LEN 8192 |
| #define MAX_REQUEST_SIZE 16384 |
| #define WORKER_THREAD_TIMEOUT_SECS 3 |
| #define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0])) |
| |
| #ifdef DEBUG_TRACE |
| #undef DEBUG_TRACE |
| #define DEBUG_TRACE(x) |
| #else |
| #if defined(DEBUG) |
| #define DEBUG_TRACE(x) do { \ |
| flockfile(stdout); \ |
| printf("*** %lu.%p.%s.%d: ", \ |
| (unsigned long) time(NULL), (void *) pthread_self(), \ |
| __func__, __LINE__); \ |
| printf x; \ |
| putchar('\n'); \ |
| fflush(stdout); \ |
| funlockfile(stdout); \ |
| } while (0) |
| #else |
| #define DEBUG_TRACE(x) |
| #endif // DEBUG |
| #endif // DEBUG_TRACE |
| |
| // 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 |
| |
| #define RETRY_ON_EINTR(ret, expr) do { \ |
| ret = expr; \ |
| } while ((ret == -1) && (errno == EINTR)); |
| |
| static const char *http_500_error = "Internal Server Error"; |
| |
| #include <openssl/crypto.h> |
| #include <openssl/ssl.h> |
| #include <openssl/err.h> |
| |
| // If these constants aren't defined, we still need them to compile and maintain backwards |
| // compatibility with pre-1.0.1 OpenSSL. |
| #ifndef SSL_OP_NO_TLSv1 |
| #define SSL_OP_NO_TLSv1 0x04000000U |
| #endif |
| #ifndef SSL_OP_NO_TLSv1_1 |
| #define SSL_OP_NO_TLSv1_1 0x10000000U |
| #endif |
| |
| #define OPENSSL_MIN_VERSION_WITH_TLS_1_1 0x10001000L |
| |
| 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 |
| }; |
| |
| char* SAFE_HTTP_METHODS[] = { |
| "GET", "POST", "HEAD", "PROPFIND", "MKCOL", "OPTIONS" }; |
| |
| // See https://www.owasp.org/index.php/Test_HTTP_Methods_(OTG-CONFIG-006) for details. |
| #ifdef ALLOW_UNSAFE_HTTP_METHODS |
| char* UNSAFE_HTTP_METHODS[] = { "DELETE" , "CONNECT", "PUT" }; |
| #endif |
| |
| // 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, SSL_PRIVATE_KEY, |
| SSL_PRIVATE_KEY_PASSWORD, SSL_GLOBAL_INIT, NUM_THREADS, RUN_AS_USER, REWRITE, |
| HIDE_FILES, REQUEST_TIMEOUT, SSL_VERSION, SSL_CIPHERS, NUM_OPTIONS |
| }; |
| |
| static const char *config_options[] = { |
| "cgi_pattern", "**.cgi$|**.pl$|**.php$", |
| "cgi_environment", NULL, |
| "put_delete_auth_file", NULL, |
| "cgi_interpreter", NULL, |
| "protect_uri", NULL, |
| "authentication_domain", "mydomain.com", |
| "ssi_pattern", "**.shtml$|**.shtm$", |
| "throttle", NULL, |
| "access_log_file", NULL, |
| "enable_directory_listing", "yes", |
| "error_log_file", NULL, |
| "global_auth_file", NULL, |
| "index_files", |
| "index.html,index.htm,index.cgi,index.shtml,index.php,index.lp", |
| "enable_keep_alive", "no", |
| "access_control_list", NULL, |
| "extra_mime_types", NULL, |
| "listening_ports", "8080", |
| "document_root", NULL, |
| "ssl_certificate", NULL, |
| "ssl_private_key", NULL, |
| "ssl_private_key_password", NULL, |
| "ssl_global_init", "yes", |
| "num_threads", "50", |
| "run_as_user", NULL, |
| "url_rewrite_patterns", NULL, |
| "hide_files_patterns", NULL, |
| "request_timeout_ms", "30000", |
| "ssl_min_version", "tlsv1", |
| "ssl_ciphers", NULL, |
| NULL |
| }; |
| |
| struct sq_context { |
| volatile int stop_flag; // Should we stop event loop |
| int wakeup_fds[2]; // File descriptors used to wake up |
| // master thread. |
| |
| SSL_CTX *ssl_ctx; // SSL context |
| char *config[NUM_OPTIONS]; // Squeasel configuration parameters |
| struct sq_callbacks callbacks; // User-defined callback function |
| void *user_data; // User-defined data |
| |
| struct socket *listening_sockets; |
| int num_listening_sockets; |
| |
| int max_threads; // Maximum number of threads to start. |
| int num_free_threads; // Number of worker threads currently not working |
| // on a request. |
| volatile int num_threads; // Number of threads |
| pthread_mutex_t mutex; // Protects (max|num|num_free)_threads |
| pthread_cond_t 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 |
| }; |
| |
| struct sq_connection { |
| struct sq_request_info request_info; |
| struct sq_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 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 |
| }; |
| |
| // Directory entry |
| struct de { |
| struct sq_connection *conn; |
| char *file_name; |
| struct file file; |
| }; |
| |
| const char **sq_get_valid_option_names(void) { |
| return config_options; |
| } |
| |
| static int is_file_in_memory(struct sq_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 (!sq_stat() || !sq_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 sq_fopen(struct sq_connection *conn, const char *path, |
| const char *mode, struct file *filep) { |
| if (!is_file_in_memory(conn, path, filep)) { |
| filep->fp = fopen(path, mode); |
| } |
| |
| return is_file_opened(filep); |
| } |
| |
| static void sq_fclose(struct file *filep) { |
| if (filep != NULL && filep->fp != NULL) { |
| fclose(filep->fp); |
| } |
| } |
| |
| static int get_option_index(const char *name) { |
| int i; |
| |
| for (i = 0; config_options[i * 2] != NULL; i++) { |
| if (strcmp(config_options[i * 2], name) == 0) { |
| return i; |
| } |
| } |
| return -1; |
| } |
| |
| const char *sq_get_option(const struct sq_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]; |
| } |
| } |
| |
| 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); |
| #else |
| inet_ntop(usa->sa.sa_family, (void *) &usa->sin.sin_addr, buf, len); |
| #endif |
| } |
| |
| static void cry(struct sq_connection *conn, |
| PRINTF_FORMAT_STRING(const char *fmt), ...) PRINTF_ARGS(2, 3); |
| |
| // Print error message to the opened error log stream. |
| static void cry(struct sq_connection *conn, const char *fmt, ...) { |
| char buf[SQ_BUF_LEN], src_addr[IP_ADDR_STR_LEN]; |
| va_list ap; |
| FILE *fp; |
| time_t timestamp; |
| |
| va_start(ap, fmt); |
| (void) 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 == NULL || 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 sq_connection *fc(const struct sq_context *ctx) { |
| static struct sq_connection fake_connection; |
| fake_connection.ctx = (struct sq_context*)ctx; |
| return &fake_connection; |
| } |
| |
| const char *sq_version(void) { |
| return SQUEASEL_VERSION; |
| } |
| |
| struct sq_request_info *sq_get_request_info(struct sq_connection *conn) { |
| return &conn->request_info; |
| } |
| |
| static void sq_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); |
| } |
| |
| static int sq_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 sq_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 * sq_strndup(const char *ptr, size_t len) { |
| char *p; |
| |
| if ((p = (char *) malloc(len + 1)) != NULL) { |
| sq_strlcpy(p, ptr, len + 1); |
| } |
| |
| return p; |
| } |
| |
| static char * sq_strdup(const char *str) { |
| return sq_strndup(str, strlen(str)); |
| } |
| |
| static const char *sq_strcasestr(const char *big_str, const char *small_str) { |
| int i, big_len = strlen(big_str), small_len = strlen(small_str); |
| |
| for (i = 0; i <= big_len - small_len; i++) { |
| if (sq_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 sq_vsnprintf(struct sq_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) { |
| cry(conn, "vsnprintf error"); |
| n = 0; |
| } else if (n >= (int) buflen) { |
| cry(conn, "truncating vsnprintf buffer: [%.*s]", |
| n > 200 ? 200 : n, buf); |
| n = (int) buflen - 1; |
| } |
| buf[n] = '\0'; |
| |
| return n; |
| } |
| |
| static int sq_snprintf(struct sq_connection *conn, char *buf, size_t buflen, |
| PRINTF_FORMAT_STRING(const char *fmt), ...) |
| PRINTF_ARGS(4, 5); |
| |
| static int sq_snprintf(struct sq_connection *conn, char *buf, size_t buflen, |
| const char *fmt, ...) { |
| va_list ap; |
| int n; |
| |
| va_start(ap, fmt); |
| n = sq_vsnprintf(conn, buf, buflen, fmt, ap); |
| va_end(ap); |
| |
| return n; |
| } |
| |
| // 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) { |
| // 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 sq_request_info *ri, |
| const char *name) { |
| int i; |
| |
| for (i = 0; i < ri->num_headers; i++) |
| if (!sq_strcasecmp(name, ri->http_headers[i].name)) |
| return ri->http_headers[i].value; |
| |
| return NULL; |
| } |
| |
| const char *sq_get_header(const struct sq_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, or_str - pattern, str); |
| return res > 0 ? res : |
| match_prefix(or_str + 1, (pattern + pattern_len) - (or_str + 1), str); |
| } |
| |
| i = j = 0; |
| res = -1; |
| 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 sq_connection *conn) { |
| const char *http_version = conn->request_info.http_version; |
| const char *header = sq_get_header(conn, "Connection"); |
| if (conn->must_close || |
| conn->status_code == 401 || |
| sq_strcasecmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes") != 0 || |
| (header != NULL && sq_strcasecmp(header, "keep-alive") != 0) || |
| (header == NULL && http_version && strcmp(http_version, "1.1"))) { |
| return 0; |
| } |
| return 1; |
| } |
| |
| static const char *suggest_connection_header(const struct sq_connection *conn) { |
| return should_keep_alive(conn) ? "keep-alive" : "close"; |
| } |
| |
| static void send_http_error(struct sq_connection *, int, const char *, |
| PRINTF_FORMAT_STRING(const char *fmt), ...) |
| PRINTF_ARGS(4, 5); |
| |
| |
| static void send_http_error(struct sq_connection *conn, int status, |
| const char *reason, const char *fmt, ...) { |
| char buf[SQ_BUF_LEN]; |
| va_list ap; |
| int len = 0; |
| |
| conn->status_code = status; |
| if (conn->ctx->callbacks.http_error == NULL || |
| conn->ctx->callbacks.http_error(conn, status)) { |
| buf[0] = '\0'; |
| |
| // Errors 1xx, 204 and 304 MUST NOT send a body |
| if (status > 199 && status != 204 && status != 304) { |
| len = sq_snprintf(conn, buf, sizeof(buf), "Error %d: %s", status, reason); |
| buf[len++] = '\n'; |
| |
| va_start(ap, fmt); |
| len += sq_vsnprintf(conn, buf + len, sizeof(buf) - len, fmt, ap); |
| va_end(ap); |
| } |
| DEBUG_TRACE(("[%s]", buf)); |
| |
| sq_printf(conn, "HTTP/1.1 %d %s\r\n" |
| "Content-Length: %d\r\n" |
| "Connection: %s\r\n\r\n", status, reason, len, |
| suggest_connection_header(conn)); |
| conn->num_bytes_sent += sq_printf(conn, "%s", buf); |
| } |
| } |
| |
| static int sq_stat(struct sq_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) { |
| fcntl(fd, F_SETFD, FD_CLOEXEC); |
| } |
| |
| int sq_start_thread(sq_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 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 |
| |
| result = pthread_create(&thread_id, &attr, func, param); |
| pthread_attr_destroy(&attr); |
| |
| return result; |
| } |
| |
| #ifndef NO_CGI |
| static pid_t spawn_process(struct sq_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, http_500_error, "fork(): %s", strerror(ERRNO)); |
| } else if (pid == 0) { |
| // Child |
| if (chdir(dir) != 0) { |
| cry(conn, "%s: chdir(%s): %s", __func__, dir, strerror(ERRNO)); |
| } else if (dup2(fdin, 0) == -1) { |
| cry(conn, "%s: dup2(%d, 0): %s", __func__, fdin, strerror(ERRNO)); |
| } else if (dup2(fdout, 1) == -1) { |
| 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); |
| cry(conn, "%s: execle(%s): %s", __func__, prog, strerror(ERRNO)); |
| } else { |
| (void) execle(interp, interp, prog, NULL, envp); |
| 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; |
| } |
| |
| int sq_get_bound_addresses(const struct sq_context *ctx, struct sockaddr_in ***addrs, |
| int *num_addrs) { |
| int n = ctx->num_listening_sockets; |
| int rc = 1; |
| int i; |
| |
| struct sockaddr_in **addr_array = calloc(n, sizeof(struct sockaddr_in *)); |
| if (addr_array == NULL) { |
| cry(fc(ctx), "%s: cannot allocate memory", __func__); |
| goto cleanup; |
| } |
| *addrs = addr_array; |
| |
| for (i = 0; i < n; i++) { |
| addr_array[i] = malloc(sizeof(*addr_array[i])); |
| if (addr_array[i] == NULL) { |
| cry(fc(ctx), "%s: cannot allocate memory", __func__); |
| goto cleanup; |
| } |
| |
| socklen_t len = sizeof(struct sockaddr_in *); |
| if (getsockname(ctx->listening_sockets[i].sock, (struct sockaddr*)addr_array[i], |
| &len) != 0) { |
| cry(fc(ctx), "%s: cannot get socket name: %s", __func__, strerror(errno)); |
| goto cleanup; |
| } |
| } |
| |
| *num_addrs = n; |
| |
| return 0; |
| |
| cleanup: |
| if (addr_array) { |
| for (i = 0; i < n; i++) { |
| free(addr_array[i]); |
| } |
| free(addr_array); |
| } |
| return rc; |
| } |
| |
| |
| // 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 { |
| RETRY_ON_EINTR(n, send(sock, buf + sent, (size_t) k, MSG_NOSIGNAL)); |
| } |
| |
| if (n <= 0) |
| break; |
| |
| sent += n; |
| } |
| |
| return sent; |
| } |
| |
| // Wait for either 'fd' or 'wakeup_fds' to have readable data. |
| static void wait_for_readable_or_wakeup(struct sq_context *ctx, |
| int fd, int timeout_ms) { |
| struct pollfd pfd[2]; |
| pfd[0].fd = fd; |
| pfd[0].events = POLLIN; |
| pfd[1].fd = ctx->wakeup_fds[0]; |
| pfd[1].events = POLLIN; |
| int poll_rc; |
| RETRY_ON_EINTR(poll_rc, poll(pfd, 2, timeout_ms)); |
| } |
| |
| // 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 sq_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. |
| RETRY_ON_EINTR(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 { |
| RETRY_ON_EINTR(nread, recv(conn->client.sock, buf, (size_t) len, 0)); |
| if (nread == -1 && errno != EAGAIN) { |
| cry(conn, "error reading: %s", strerror(errno)); |
| } |
| } |
| |
| return conn->ctx->stop_flag ? -1 : nread; |
| } |
| |
| static int pull_all(FILE *fp, struct sq_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 sq_read(struct sq_connection *conn, void *buf, size_t len) { |
| int n, buffered_len, nread; |
| const char *body; |
| |
| // If Content-Length is not set, read until socket is closed |
| if (conn->consumed_content == 0 && conn->content_len == 0) { |
| 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 to_read = conn->content_len - conn->consumed_content; |
| if (to_read < (int64_t) len) { |
| len = (size_t) to_read; |
| } |
| |
| // Return buffered data |
| body = conn->buf + conn->request_len + conn->consumed_content; |
| buffered_len = &conn->buf[conn->data_len] - body; |
| if (buffered_len > 0) { |
| if (len < (size_t) buffered_len) { |
| buffered_len = (int) len; |
| } |
| memcpy(buf, body, (size_t) buffered_len); |
| len -= 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. |
| n = pull_all(NULL, conn, (char *) buf, (int) len); |
| nread = n >= 0 ? nread + n : n; |
| } |
| return nread; |
| } |
| |
| int sq_write(struct sq_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 = SQ_BUF_LEN; |
| int len = -1; |
| |
| *buf = NULL; |
| while (len == -1) { |
| if (*buf) free(*buf); |
| *buf = 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 *) malloc(size)) == NULL) { |
| len = -1; // Allocation failed, mark failure |
| } else { |
| va_copy(ap_copy, ap); |
| vsnprintf(*buf, size, fmt, ap_copy); |
| va_end(ap_copy); |
| } |
| |
| return len; |
| } |
| |
| int sq_vprintf(struct sq_connection *conn, const char *fmt, va_list ap) { |
| char mem[SQ_BUF_LEN], *buf = mem; |
| int len; |
| |
| if ((len = alloc_vprintf(&buf, sizeof(mem), fmt, ap)) > 0) { |
| len = sq_write(conn, buf, (size_t) len); |
| } |
| if (buf != mem && buf != NULL) { |
| free(buf); |
| } |
| |
| return len; |
| } |
| |
| int sq_printf(struct sq_connection *conn, const char *fmt, ...) { |
| va_list ap; |
| va_start(ap, fmt); |
| int ret_val = sq_vprintf(conn, fmt, ap); |
| va_end(ap); |
| return ret_val; |
| } |
| |
| int sq_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 (src[i] == '%' && i < src_len - 2 && |
| 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 sq_get_var(const char *data, size_t data_len, const char *name, |
| char *dst, size_t dst_len) { |
| 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] == '=' && |
| !sq_strncasecmp(name, p, name_len)) { |
| |
| // 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 = sq_url_decode(p, (size_t)(s - p), dst, dst_len, 1); |
| |
| // Redirect error code from -1 to -2 (destination buffer too small). |
| if (len == -1) { |
| len = -2; |
| } |
| break; |
| } |
| } |
| } |
| |
| return len; |
| } |
| |
| int sq_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 = sq_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 = p - s; |
| sq_strlcpy(dst, s, (size_t) len + 1); |
| } else { |
| len = -3; |
| } |
| break; |
| } |
| } |
| } |
| return len; |
| } |
| |
| static void convert_uri_to_file_name(struct sq_connection *conn, char *buf, |
| size_t buf_len, struct file *filep) { |
| 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; |
| |
| // 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. |
| sq_snprintf(conn, buf, 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, a.len, uri)) > 0) { |
| sq_snprintf(conn, buf, buf_len - 1, "%.*s%s", (int) b.len, b.ptr, |
| uri + match_len); |
| break; |
| } |
| } |
| |
| if (sq_stat(conn, buf, filep)) 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 = sq_get_header(conn, "Accept-Encoding")) != NULL) { |
| if (strstr(accept_encoding,"gzip") != NULL) { |
| snprintf(gz_path, sizeof(gz_path), "%s.gz", buf); |
| if (sq_stat(conn, gz_path, filep)) { |
| filep->gzipped = 1; |
| return; |
| } |
| } |
| } |
| |
| // Support PATH_INFO for CGI scripts. |
| for (p = buf + strlen(buf); p > buf + 1; p--) { |
| if (*p == '/') { |
| *p = '\0'; |
| if (match_prefix(conn->ctx->config[CGI_EXTENSIONS], |
| strlen(conn->ctx->config[CGI_EXTENSIONS]), buf) > 0 && |
| sq_stat(conn, buf, 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] = '/'; |
| 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]; |
| 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)) && |
| year > 1970 && |
| (month = get_month_index(month_str)) != -1) { |
| leap_days = num_leap_years(year) - num_leap_years(1970); |
| year -= 1970; |
| days = year * 365 + days_before_month[month] + (day - 1) + leap_days; |
| result = days * 24 * 3600 + 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[] = { |
| {".html", 5, "text/html"}, |
| {".htm", 4, "text/html"}, |
| {".shtm", 5, "text/html"}, |
| {".shtml", 6, "text/html"}, |
| {".css", 4, "text/css"}, |
| {".js", 3, "application/x-javascript"}, |
| {".ico", 4, "image/x-icon"}, |
| {".gif", 4, "image/gif"}, |
| {".jpg", 4, "image/jpeg"}, |
| {".jpeg", 5, "image/jpeg"}, |
| {".png", 4, "image/png"}, |
| {".svg", 4, "image/svg+xml"}, |
| {".txt", 4, "text/plain"}, |
| {".torrent", 8, "application/x-bittorrent"}, |
| {".wav", 4, "audio/x-wav"}, |
| {".mp3", 4, "audio/x-mp3"}, |
| {".mid", 4, "audio/mid"}, |
| {".m3u", 4, "audio/x-mpegurl"}, |
| {".ogg", 4, "audio/ogg"}, |
| {".ram", 4, "audio/x-pn-realaudio"}, |
| {".xml", 4, "text/xml"}, |
| {".json", 5, "text/json"}, |
| {".xslt", 5, "application/xml"}, |
| {".xsl", 4, "application/xml"}, |
| {".ra", 3, "audio/x-pn-realaudio"}, |
| {".doc", 4, "application/msword"}, |
| {".exe", 4, "application/octet-stream"}, |
| {".zip", 4, "application/x-zip-compressed"}, |
| {".xls", 4, "application/excel"}, |
| {".tgz", 4, "application/x-tar-gz"}, |
| {".tar", 4, "application/x-tar"}, |
| {".gz", 3, "application/x-gunzip"}, |
| {".arj", 4, "application/x-arj-compressed"}, |
| {".rar", 4, "application/x-arj-compressed"}, |
| {".rtf", 4, "application/rtf"}, |
| {".pdf", 4, "application/pdf"}, |
| {".swf", 4, "application/x-shockwave-flash"}, |
| {".mpg", 4, "video/mpeg"}, |
| {".webm", 5, "video/webm"}, |
| {".mpeg", 5, "video/mpeg"}, |
| {".mov", 4, "video/quicktime"}, |
| {".mp4", 4, "video/mp4"}, |
| {".m4v", 4, "video/x-m4v"}, |
| {".asf", 4, "video/x-ms-asf"}, |
| {".avi", 4, "video/x-msvideo"}, |
| {".bmp", 4, "image/bmp"}, |
| {".ttf", 4, "application/x-font-ttf"}, |
| {NULL, 0, NULL} |
| }; |
| |
| const char *sq_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 && |
| sq_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 sq_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 (sq_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) { |
| *vec = mime_vec; |
| return; |
| } |
| } |
| |
| vec->ptr = sq_get_builtin_mime_type(path); |
| vec->len = strlen(vec->ptr); |
| } |
| |
| static int is_big_endian(void) { |
| static const int n = 1; |
| return ((char *) &n)[0] == 0; |
| } |
| |
| #ifndef HAVE_MD5 |
| typedef struct MD5Context { |
| uint32_t buf[4]; |
| uint32_t bits[2]; |
| unsigned char in[64]; |
| } MD5_CTX; |
| |
| static void byteReverse(unsigned char *buf, unsigned longs) { |
| uint32_t t; |
| |
| // Forrest: MD5 expect LITTLE_ENDIAN, swap if BIG_ENDIAN |
| if (is_big_endian()) { |
| do { |
| t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 | |
| ((unsigned) buf[1] << 8 | buf[0]); |
| * (uint32_t *) buf = t; |
| buf += 4; |
| } while (--longs); |
| } |
| } |
| |
| #define F1(x, y, z) (z ^ (x & (y ^ z))) |
| #define F2(x, y, z) F1(z, x, y) |
| #define F3(x, y, z) (x ^ y ^ z) |
| #define F4(x, y, z) (y ^ (x | ~z)) |
| |
| #define MD5STEP(f, w, x, y, z, data, s) \ |
| ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) |
| |
| // Start MD5 accumulation. Set bit count to 0 and buffer to mysterious |
| // initialization constants. |
| static void MD5Init(MD5_CTX *ctx) { |
| ctx->buf[0] = 0x67452301; |
| ctx->buf[1] = 0xefcdab89; |
| ctx->buf[2] = 0x98badcfe; |
| ctx->buf[3] = 0x10325476; |
| |
| ctx->bits[0] = 0; |
| ctx->bits[1] = 0; |
| } |
| |
| static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) { |
| register uint32_t a, b, c, d; |
| |
| a = buf[0]; |
| b = buf[1]; |
| c = buf[2]; |
| d = buf[3]; |
| |
| MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); |
| MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); |
| MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); |
| MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); |
| MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); |
| MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); |
| MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); |
| MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); |
| MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); |
| MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); |
| MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); |
| MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); |
| MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); |
| MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); |
| MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); |
| MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); |
| |
| MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); |
| MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); |
| MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); |
| MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); |
| MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); |
| MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); |
| MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); |
| MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); |
| MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); |
| MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); |
| MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); |
| MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); |
| MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); |
| MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); |
| MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); |
| MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); |
| |
| MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); |
| MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); |
| MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); |
| MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); |
| MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); |
| MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); |
| MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); |
| MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); |
| MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); |
| MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); |
| MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); |
| MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); |
| MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); |
| MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); |
| MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); |
| MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); |
| |
| MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); |
| MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); |
| MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); |
| MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); |
| MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); |
| MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); |
| MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); |
| MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); |
| MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); |
| MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); |
| MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); |
| MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); |
| MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); |
| MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); |
| MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); |
| MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); |
| |
| buf[0] += a; |
| buf[1] += b; |
| buf[2] += c; |
| buf[3] += d; |
| } |
| |
| static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) { |
| uint32_t t; |
| |
| t = ctx->bits[0]; |
| if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) |
| ctx->bits[1]++; |
| ctx->bits[1] += len >> 29; |
| |
| t = (t >> 3) & 0x3f; |
| |
| if (t) { |
| unsigned char *p = (unsigned char *) ctx->in + t; |
| |
| t = 64 - t; |
| if (len < t) { |
| memcpy(p, buf, len); |
| return; |
| } |
| memcpy(p, buf, t); |
| byteReverse(ctx->in, 16); |
| MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
| buf += t; |
| len -= t; |
| } |
| |
| while (len >= 64) { |
| memcpy(ctx->in, buf, 64); |
| byteReverse(ctx->in, 16); |
| MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
| buf += 64; |
| len -= 64; |
| } |
| |
| memcpy(ctx->in, buf, len); |
| } |
| |
| static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) { |
| unsigned count; |
| unsigned char *p; |
| uint32_t *a; |
| |
| count = (ctx->bits[0] >> 3) & 0x3F; |
| |
| p = ctx->in + count; |
| *p++ = 0x80; |
| count = 64 - 1 - count; |
| if (count < 8) { |
| memset(p, 0, count); |
| byteReverse(ctx->in, 16); |
| MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
| memset(ctx->in, 0, 56); |
| } else { |
| memset(p, 0, count - 8); |
| } |
| byteReverse(ctx->in, 14); |
| |
| a = (uint32_t *)ctx->in; |
| a[14] = ctx->bits[0]; |
| a[15] = ctx->bits[1]; |
| |
| MD5Transform(ctx->buf, (uint32_t *) ctx->in); |
| byteReverse((unsigned char *) ctx->buf, 4); |
| memcpy(digest, ctx->buf, 16); |
| memset((char *) ctx, 0, sizeof(*ctx)); |
| } |
| #endif // !HAVE_MD5 |
| |
| // 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 *sq_md5(char buf[33], ...) { |
| unsigned char hash[16]; |
| const char *p; |
| va_list ap; |
| MD5_CTX ctx; |
| |
| MD5Init(&ctx); |
| |
| va_start(ap, buf); |
| while ((p = va_arg(ap, const char *)) != NULL) { |
| MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p)); |
| } |
| va_end(ap); |
| |
| MD5Final(hash, &ctx); |
| 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; |
| } |
| |
| sq_md5(ha2, method, ":", uri, NULL); |
| sq_md5(expected_response, ha1, ":", nonce, ":", nc, |
| ":", cnonce, ":", qop, ":", ha2, NULL); |
| |
| return sq_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 sq_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 (!sq_fopen(conn, gpass, "r", filep)) { |
| cry(conn, "fopen(%s): %s", gpass, strerror(ERRNO)); |
| } |
| // Important: using local struct file to test path for is_directory flag. |
| // If filep is used, sq_stat() makes it appear as if auth file was opened. |
| } else if (sq_stat(conn, path, &file) && file.is_directory) { |
| sq_snprintf(conn, name, sizeof(name), "%s%c%s", |
| path, '/', PASSWORDS_FILE_NAME); |
| sq_fopen(conn, name, "r", filep); |
| } else { |
| // Try to find .htpasswd in requested directory. |
| for (p = path, e = p + strlen(p) - 1; e > p; e--) |
| if (e[0] == '/') |
| break; |
| sq_snprintf(conn, name, sizeof(name), "%.*s%c%s", |
| (int) (e - p), p, '/', PASSWORDS_FILE_NAME); |
| sq_fopen(conn, name, "r", filep); |
| } |
| } |
| |
| // 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 sq_connection *conn, char *buf, |
| size_t buf_size, struct ah *ah) { |
| char *name, *value, *s; |
| const char *auth_header; |
| |
| (void) memset(ah, 0, sizeof(*ah)); |
| if ((auth_header = sq_get_header(conn, "Authorization")) == NULL || |
| sq_strncasecmp(auth_header, "Digest ", 7) != 0) { |
| return 0; |
| } |
| |
| // Make modifiable copy of the auth header |
| (void) sq_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; |
| } |
| } |
| |
| // CGI needs it as REMOTE_USER |
| if (ah->user != NULL) { |
| conn->request_info.remote_user = sq_strdup(ah->user); |
| } else { |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| static char *sq_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, size, filep->fp); |
| } else { |
| return NULL; |
| } |
| } |
| |
| // Authorize against the opened passwords file. Return 1 if authorized. |
| static int authorize(struct sq_connection *conn, struct file *filep) { |
| struct ah ah; |
| char line[256], f_user[256], ha1[256], f_domain[256], buf[SQ_BUF_LEN], *p; |
| |
| if (!parse_auth_header(conn, buf, sizeof(buf), &ah)) { |
| return 0; |
| } |
| |
| // Loop over passwords file |
| p = (char *) filep->membuf; |
| while (sq_fgets(line, sizeof(line), filep, &p) != NULL) { |
| if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) != 3) { |
| continue; |
| } |
| |
| if (!strcmp(ah.user, f_user) && |
| !strcmp(conn->ctx->config[AUTHENTICATION_DOMAIN], f_domain)) |
| return check_password(conn->request_info.request_method, ha1, ah.uri, |
| ah.nonce, ah.nc, ah.cnonce, ah.qop, ah.response); |
| } |
| |
| return 0; |
| } |
| |
| // Return 1 if request is authorised, 0 otherwise. |
| static int check_authorization(struct sq_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)) { |
| sq_snprintf(conn, fname, sizeof(fname), "%.*s", |
| (int) filename_vec.len, filename_vec.ptr); |
| if (!sq_fopen(conn, fname, "r", &file)) { |
| 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); |
| sq_fclose(&file); |
| } |
| |
| return authorized; |
| } |
| |
| static void send_authorization_request(struct sq_connection *conn) { |
| conn->status_code = 401; |
| sq_printf(conn, |
| "HTTP/1.1 401 Unauthorized\r\n" |
| "Content-Length: 0\r\n" |
| "WWW-Authenticate: Digest qop=\"auth\", " |
| "realm=\"%s\", nonce=\"%lu\"\r\n\r\n", |
| conn->ctx->config[AUTHENTICATION_DOMAIN], |
| (unsigned long) time(NULL)); |
| } |
| |
| static int is_authorized_for_put(struct sq_connection *conn) { |
| struct file file = STRUCT_FILE_INITIALIZER; |
| const char *passfile = conn->ctx->config[PUT_DELETE_PASSWORDS_FILE]; |
| int ret = 0; |
| |
| if (passfile != NULL && sq_fopen(conn, passfile, "r", &file)) { |
| ret = authorize(conn, &file); |
| sq_fclose(&file); |
| } |
| |
| return ret; |
| } |
| |
| int sq_modify_passwords_file(const char *fname, const char *domain, |
| const char *user, const char *pass) { |
| int found; |
| char line[512], u[512], d[512], ha1[33], tmp[PATH_MAX]; |
| 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; |
| } |
| |
| (void) snprintf(tmp, sizeof(tmp), "%s.tmp", fname); |
| |
| // 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, "%[^:]:%[^:]:%*s", u, d) != 2) { |
| continue; |
| } |
| |
| if (!strcmp(u, user) && !strcmp(d, domain)) { |
| found++; |
| if (pass != NULL) { |
| sq_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) { |
| sq_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 |
| remove(fname); |
| rename(tmp, fname); |
| |
| return 1; |
| } |
| |
| static SOCKET conn2(const char *host, int port, int use_ssl, |
| char *ebuf, size_t ebuf_len) { |
| struct sockaddr_in sin; |
| struct hostent *he; |
| SOCKET sock = INVALID_SOCKET; |
| |
| if (host == NULL) { |
| snprintf(ebuf, ebuf_len, "%s", "NULL host"); |
| // 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); |
| sin.sin_family = AF_INET; |
| sin.sin_port = htons((uint16_t) port); |
| sin.sin_addr = * (struct in_addr *) he->h_addr_list[0]; |
| if (connect(sock, (struct sockaddr *) &sin, sizeof(sin)) != 0) { |
| snprintf(ebuf, ebuf_len, "connect(%s:%d): %s", |
| host, port, strerror(ERRNO)); |
| closesocket(sock); |
| sock = INVALID_SOCKET; |
| } |
| } |
| return sock; |
| } |
| |
| |
| |
| void sq_url_encode(const char *src, char *dst, size_t dst_len) { |
| static const char *dont_escape = "._-$,;~()"; |
| static const char *hex = "0123456789abcdef"; |
| const char *end = dst + dst_len - 1; |
| |
| for (; *src != '\0' && dst < end; src++, dst++) { |
| if (isalnum(*(const unsigned char *) src) || |
| strchr(dont_escape, * (const unsigned char *) src) != NULL) { |
| *dst = *src; |
| } else if (dst + 2 < end) { |
| dst[0] = '%'; |
| dst[1] = hex[(* (const unsigned char *) src) >> 4]; |
| dst[2] = hex[(* (const unsigned char *) src) & 0xf]; |
| dst += 2; |
| } |
| } |
| |
| *dst = '\0'; |
| } |
| |
| // One simple rule: Strip everything between < and > |
| static void sq_strip_tags(const char *src, char *dst, size_t dst_len) { |
| const char *end = dst + dst_len + 1; |
| char tag = 0; |
| for(; *src != '\0' && dst < end; src++) { |
| if (*src == '<') { |
| tag = 1; |
| } else if (*src == '>') { |
| tag = 0; |
| } else if (tag == 0) { |
| *dst++ = *src; |
| } |
| } |
| *dst = '\0'; |
| } |
| |
| |
| static void print_dir_entry(struct de *de) { |
| char size[64], mod[64], href[PATH_MAX]; |
| |
| if (de->file.is_directory) { |
| sq_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) { |
| sq_snprintf(de->conn, size, sizeof(size), "%d", (int) de->file.size); |
| } else if (de->file.size < 0x100000) { |
| sq_snprintf(de->conn, size, sizeof(size), |
| "%.1fk", (double) de->file.size / 1024.0); |
| } else if (de->file.size < 0x40000000) { |
| sq_snprintf(de->conn, size, sizeof(size), |
| "%.1fM", (double) de->file.size / 1048576); |
| } else { |
| sq_snprintf(de->conn, size, sizeof(size), |
| "%.1fG", (double) de->file.size / 1073741824); |
| } |
| } |
| struct tm the_time; |
| strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", |
| localtime_r(&de->file.modification_time, &the_time)); |
| sq_url_encode(de->file_name, href, sizeof(href)); |
| de->conn->num_bytes_sent += sq_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 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 sq_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, strlen(pw_pattern), path) > 0 || |
| (pattern != NULL && match_prefix(pattern, strlen(pattern), path) > 0); |
| } |
| |
| static int scan_directory(struct sq_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; |
| } |
| |
| sq_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 sq_stat() |
| // fails. For more details, see |
| // http://code.google.com/p/mongoose/issues/detail?id=79 |
| memset(&de.file, 0, sizeof(de.file)); |
| sq_stat(conn, path, &de.file); |
| |
| de.file_name = dp->d_name; |
| cb(&de, data); |
| } |
| (void) closedir(dirp); |
| } |
| return 1; |
| } |
| |
| static int remove_directory(struct sq_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; |
| } |
| |
| sq_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 sq_stat() |
| // fails. For more details, see |
| // http://code.google.com/p/mongoose/issues/detail?id=79 |
| memset(&de.file, 0, sizeof(de.file)); |
| sq_stat(conn, path, &de.file); |
| if(de.file.modification_time) { |
| if(de.file.is_directory) { |
| remove_directory(conn, path); |
| } else { |
| sq_remove(path); |
| } |
| } |
| |
| } |
| (void) closedir(dirp); |
| |
| 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 = realloc(ptr, size); |
| if (new_ptr == NULL) { |
| 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 = sq_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 sq_connection *conn, |
| const char *dir) { |
| int i, sort_direction; |
| struct dir_scan_data data = { NULL, 0, 128 }; |
| |
| if (!scan_directory(conn, dir, &data, dir_scan_callback)) { |
| send_http_error(conn, 500, "Cannot open directory", |
| "Error: opendir(%s): %s", dir, strerror(ERRNO)); |
| return; |
| } |
| |
| sort_direction = conn->request_info.query_string != NULL && |
| conn->request_info.query_string[1] == 'd' ? 'a' : 'd'; |
| |
| conn->must_close = 1; |
| sq_printf(conn, "%s", |
| "HTTP/1.1 200 OK\r\n" |
| "Connection: close\r\n" |
| "Content-Type: text/html; charset=utf-8\r\n\r\n"); |
| |
| conn->num_bytes_sent += sq_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 += sq_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 |
| 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]); |
| free(data.entries[i].file_name); |
| } |
| free(data.entries); |
| |
| conn->num_bytes_sent += sq_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 sq_connection *conn, struct file *filep, |
| int64_t offset, int64_t len) { |
| char buf[SQ_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; |
| } |
| sq_write(conn, filep->membuf + offset, (size_t) len); |
| } else if (len > 0 && filep->fp != NULL) { |
| fseeko(filep->fp, offset, SEEK_SET); |
| 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 = 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 = sq_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 gmt_time_string(char *buf, size_t buf_len, time_t *t) { |
| strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t)); |
| } |
| |
| 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) { |
| if (filep != NULL && filep->fp != NULL) { |
| fcntl(fileno(filep->fp), F_SETFD, FD_CLOEXEC); |
| } |
| } |
| |
| static void handle_file_request(struct sq_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]; |
| char const* encoding = ""; |
| |
| 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 (!sq_fopen(conn, path, "rb", filep)) { |
| send_http_error(conn, 500, http_500_error, |
| "fopen(%s): %s", path, strerror(ERRNO)); |
| return; |
| } |
| |
| fclose_on_exec(filep); |
| |
| // If Range: header specified, act accordingly |
| r1 = r2 = 0; |
| hdr = sq_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 uncmpressed space) |
| if (filep->gzipped) { |
| send_http_error(conn, 501, "Not Implemented", "range requests in gzipped files are not supported"); |
| return; |
| } |
| conn->status_code = 206; |
| cl = n == 2 ? (r2 > cl ? cl : r2) - r1 + 1: cl - r1; |
| sq_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"; |
| } |
| |
| // 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) sq_printf(conn, |
| "HTTP/1.1 %d %s\r\n" |
| "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, 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); |
| } |
| sq_fclose(filep); |
| } |
| |
| void sq_send_file(struct sq_connection *conn, const char *path) { |
| struct file file = STRUCT_FILE_INITIALIZER; |
| if (sq_stat(conn, path, &file)) { |
| handle_file_request(conn, path, &file); |
| } else { |
| send_http_error(conn, 404, "Not Found", "%s", "File not found"); |
| } |
| } |
| |
| |
| // Parse HTTP headers from the given buffer, advance buffer to the point |
| // where parsing stopped. |
| static void parse_http_headers(char **buf, struct sq_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) { |
| for (unsigned int i = 0; i < sizeof(SAFE_HTTP_METHODS) / sizeof(char*); ++i) { |
| if (!strcmp(method, SAFE_HTTP_METHODS[i])) return 1; |
| } |
| |
| #ifdef ALLOW_UNSAFE_HTTP_METHODS |
| for (unsigned int i = 0; i < sizeof(UNSAFE_HTTP_METHODS) / sizeof(char*); ++i) { |
| if (!strcmp(method, UNSAFE_HTTP_METHODS[i])) return 1; |
| } |
| #endif |
| |
| return 0; |
| } |
| |
| // Parse HTTP request, fill in sq_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 sq_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_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 sq_connection *conn, |
| char *buf, int bufsiz, int *nread) { |
| int request_len, n = 0; |
| |
| request_len = get_request_len(buf, *nread); |
| if (request_len == 0) { |
| // If we are starting to read a new request, with nothing buffered, |
| // wait for either the beginning of the request, or for the shutdown |
| // signal. |
| wait_for_readable_or_wakeup(conn->ctx, fp ? fileno(fp) : conn->client.sock, |
| atoi(conn->ctx->config[REQUEST_TIMEOUT])); |
| } |
| |
| while (conn->ctx->stop_flag == 0 && |
| *nread < bufsiz && request_len == 0 && |
| (n = pull(fp, conn, buf + *nread, bufsiz - *nread)) > 0) { |
| *nread += n; |
| assert(*nread <= bufsiz); |
| request_len = get_request_len(buf, *nread); |
| } |
| |
| return request_len <= 0 && n <= 0 ? -1 : request_len; |
| } |
| |
| // For given directory path, substitute it to valid index file. |
| // Return 0 if index file has been found, -1 if not found. |
| // If the file is found, it's stats is returned in stp. |
| static int substitute_index_file(struct sq_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 |
| sq_strlcpy(path + n + 1, filename_vec.ptr, filename_vec.len + 1); |
| |
| // Does it exist? |
| if (sq_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 sq_connection *conn, |
| const struct file *filep) { |
| char etag[64]; |
| const char *ims = sq_get_header(conn, "If-Modified-Since"); |
| const char *inm = sq_get_header(conn, "If-None-Match"); |
| construct_etag(etag, sizeof(etag), filep); |
| return (inm != NULL && !sq_strcasecmp(etag, inm)) || |
| (ims != NULL && filep->modification_time <= parse_date_string(ims)); |
| } |
| |
| static int forward_body_data(struct sq_connection *conn, FILE *fp, |
| SOCKET sock, SSL *ssl) { |
| const char *expect, *body; |
| char buf[SQ_BUF_LEN]; |
| int to_read, nread, buffered_len, success = 0; |
| |
| expect = sq_get_header(conn, "Expect"); |
| assert(fp != NULL); |
| |
| if (conn->content_len == -1) { |
| send_http_error(conn, 411, "Length Required", "%s", ""); |
| } else if (expect != NULL && sq_strcasecmp(expect, "100-continue")) { |
| send_http_error(conn, 417, "Expectation Failed", "%s", ""); |
| } else { |
| if (expect != NULL) { |
| (void) sq_printf(conn, "%s", "HTTP/1.1 100 Continue\r\n\r\n"); |
| } |
| |
| body = conn->buf + conn->request_len + conn->consumed_content; |
| buffered_len = &conn->buf[conn->data_len] - body; |
| 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; |
| } |
| 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) { |
| send_http_error(conn, 577, http_500_error, "%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 sq_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 = sq_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 { |
| cry(block->conn, "%s: CGI env buffer truncated for [%s]", __func__, fmt); |
| } |
| |
| return added; |
| } |
| |
| static void prepare_cgi_environment(struct sq_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", "Squeasel", sq_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 = sq_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 = sq_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 ((s = getenv("LD_LIBRARY_PATH")) != NULL) |
| addenv(blk, "LD_LIBRARY_PATH=%s", s); |
| |
| 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 sq_connection *conn, const char *prog) { |
| int headers_len, data_len, i, fdin[2], fdout[2]; |
| const char *status, *status_text; |
| char buf[16384], *pbuf, dir[PATH_MAX], *p; |
| struct sq_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; |
| |
| 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) sq_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, http_500_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, http_500_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]); |
| set_close_on_exec(fdin[1]); |
| set_close_on_exec(fdout[0]); |
| set_close_on_exec(fdout[1]); |
| |
| // 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 || |
| (out = fdopen(fdout[0], "rb")) == NULL) { |
| send_http_error(conn, 500, http_500_error, |
| "fopen: %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; |
| headers_len = read_request(out, conn, buf, sizeof(buf), &data_len); |
| if (headers_len <= 0) { |
| send_http_error(conn, 500, http_500_error, |
| "CGI program sent malformed or too big (>%u bytes) " |
| "HTTP headers: [%.*s]", |
| (unsigned) sizeof(buf), 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; |
| } |
| if (get_header(&ri, "Connection") != NULL && |
| !sq_strcasecmp(get_header(&ri, "Connection"), "keep-alive")) { |
| conn->must_close = 1; |
| } |
| (void) sq_printf(conn, "HTTP/1.1 %d %s\r\n", conn->status_code, |
| status_text); |
| |
| // Send headers |
| for (i = 0; i < ri.num_headers; i++) { |
| sq_printf(conn, "%s: %s\r\n", |
| ri.http_headers[i].name, ri.http_headers[i].value); |
| } |
| sq_write(conn, "\r\n", 2); |
| |
| // Send chunk of data that may have been read after the headers |
| conn->num_bytes_sent += sq_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 (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]); |
| } |
| } |
| #endif // !NO_CGI |
| |
| // For a given PUT path, create all intermediate subdirectories |
| // for given path. Return 0 if the path itself is a directory, |
| // or -1 on error, 1 if OK. |
| static int put_dir(struct sq_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 = p - path; |
| if (len >= (int) sizeof(buf)) { |
| res = -1; |
| break; |
| } |
| memcpy(buf, path, len); |
| buf[len] = '\0'; |
| |
| // Try to create intermediate directory |
| DEBUG_TRACE(("mkdir(%s)", buf)); |
| if (!sq_stat(conn, buf, &file) && sq_mkdir(buf, 0755) != 0) { |
| res = -1; |
| break; |
| } |
| |
| // Is path itself a directory? |
| if (p[1] == '\0') { |
| res = 0; |
| } |
| } |
| |
| return res; |
| } |
| |
| static void mkcol(struct sq_connection *conn, const char *path) { |
| int rc, body_len; |
| struct de de; |
| memset(&de.file, 0, sizeof(de.file)); |
| sq_stat(conn, path, &de.file); |
| |
| if(de.file.modification_time) { |
| send_http_error(conn, 405, "Method Not Allowed", |
| "mkcol(%s): %s", path, strerror(ERRNO)); |
| return; |
| } |
| |
| body_len = conn->data_len - conn->request_len; |
| if(body_len > 0) { |
| send_http_error(conn, 415, "Unsupported media type", |
| "mkcol(%s): %s", path, strerror(ERRNO)); |
| return; |
| } |
| |
| rc = sq_mkdir(path, 0755); |
| |
| if (rc == 0) { |
| conn->status_code = 201; |
| sq_printf(conn, "HTTP/1.1 %d Created\r\n\r\n", conn->status_code); |
| } else if (rc == -1) { |
| if(errno == EEXIST) |
| send_http_error(conn, 405, "Method Not Allowed", |
| "mkcol(%s): %s", path, strerror(ERRNO)); |
| else if(errno == EACCES) |
| send_http_error(conn, 403, "Forbidden", |
| "mkcol(%s): %s", path, strerror(ERRNO)); |
| else if(errno == ENOENT) |
| send_http_error(conn, 409, "Conflict", |
| "mkcol(%s): %s", path, strerror(ERRNO)); |
| else |
| send_http_error(conn, 500, http_500_error, |
| "fopen(%s): %s", path, strerror(ERRNO)); |
| } |
| } |
| |
| static void put_file(struct sq_connection *conn, const char *path) { |
| struct file file = STRUCT_FILE_INITIALIZER; |
| const char *range; |
| int64_t r1, r2; |
| int rc; |
| |
| conn->status_code = sq_stat(conn, path, &file) ? 200 : 201; |
| |
| if ((rc = put_dir(conn, path)) == 0) { |
| sq_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", conn->status_code); |
| } else if (rc == -1) { |
| send_http_error(conn, 500, http_500_error, |
| "put_dir(%s): %s", path, strerror(ERRNO)); |
| } else if (!sq_fopen(conn, path, "wb+", &file) || file.fp == NULL) { |
| sq_fclose(&file); |
| send_http_error(conn, 500, http_500_error, |
| "fopen(%s): %s", path, strerror(ERRNO)); |
| } else { |
| fclose_on_exec(&file); |
| range = sq_get_header(conn, "Content-Range"); |
| r1 = r2 = 0; |
| if (range != NULL && parse_range_header(range, &r1, &r2) > 0) { |
| conn->status_code = 206; |
| fseeko(file.fp, r1, SEEK_SET); |
| } |
| if (!forward_body_data(conn, file.fp, INVALID_SOCKET, NULL)) { |
| conn->status_code = 500; |
| } |
| sq_printf(conn, "HTTP/1.1 %d OK\r\nContent-Length: 0\r\n\r\n", |
| conn->status_code); |
| sq_fclose(&file); |
| } |
| } |
| |
| static void send_ssi_file(struct sq_connection *, const char *, |
| struct file *, int); |
| |
| static void do_ssi_include(struct sq_connection *conn, const char *ssi, |
| char *tag, int include_level) { |
| char file_name[SQ_BUF_LEN], path[PATH_MAX], *p; |
| struct file file = STRUCT_FILE_INITIALIZER; |
| |
| // sscanf() is safe here, since send_ssi_file() also uses buffer |
| // of size SQ_BUF_LEN to get the tag. So strlen(tag) is always < SQ_BUF_LEN. |
| if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) { |
| // File name is relative to the webserver root |
| (void) sq_snprintf(conn, path, sizeof(path), "%s%c%s", |
| conn->ctx->config[DOCUMENT_ROOT], '/', file_name); |
| } else if (sscanf(tag, " abspath=\"%[^\"]\"", file_name) == 1) { |
| // File name is relative to the webserver working directory |
| // or it is absolute system path |
| (void) sq_snprintf(conn, path, sizeof(path), "%s", file_name); |
| } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1 || |
| sscanf(tag, " \"%[^\"]\"", file_name) == 1) { |
| // File name is relative to the currect document |
| (void) sq_snprintf(conn, path, sizeof(path), "%s", ssi); |
| if ((p = strrchr(path, '/')) != NULL) { |
| p[1] = '\0'; |
| } |
| (void) sq_snprintf(conn, path + strlen(path), |
| sizeof(path) - strlen(path), "%s", file_name); |
| } else { |
| cry(conn, "Bad SSI #include: [%s]", tag); |
| return; |
| } |
| |
| if (!sq_fopen(conn, path, "rb", &file)) { |
| cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s", |
| tag, path, strerror(ERRNO)); |
| } else { |
| fclose_on_exec(&file); |
| if (match_prefix(conn->ctx->config[SSI_EXTENSIONS], |
| 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); |
| } |
| sq_fclose(&file); |
| } |
| } |
| |
| #if !defined(NO_POPEN) |
| static void do_ssi_exec(struct sq_connection *conn, char *tag) { |
| char cmd[SQ_BUF_LEN]; |
| struct file file = STRUCT_FILE_INITIALIZER; |
| |
| if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) { |
| cry(conn, "Bad SSI #exec: [%s]", tag); |
| } else if ((file.fp = popen(cmd, "r")) == NULL) { |
| 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 sq_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 sq_connection *conn, const char *path, |
| struct file *filep, int include_level) { |
| char buf[SQ_BUF_LEN]; |
| int ch, offset, len, in_ssi_tag; |
| |
| if (include_level > 10) { |
| cry(conn, "SSI #include level is too deep (%s)", path); |
| return; |
| } |
| |
| in_ssi_tag = len = offset = 0; |
| while ((ch = sq_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) sq_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 { |
| 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) { |
| 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) { |
| sq_write(conn, buf, (size_t) len); |
| } |
| len = 0; |
| buf[len++] = ch & 0xff; |
| } else { |
| buf[len++] = ch & 0xff; |
| if (len == (int) sizeof(buf)) { |
| sq_write(conn, buf, (size_t) len); |
| len = 0; |
| } |
| } |
| } |
| |
| // Send the rest of buffered data |
| if (len > 0) { |
| sq_write(conn, buf, (size_t) len); |
| } |
| } |
| |
| static void handle_ssi_file_request(struct sq_connection *conn, |
| const char *path) { |
| struct file file = STRUCT_FILE_INITIALIZER; |
| |
| if (!sq_fopen(conn, path, "rb", &file)) { |
| send_http_error(conn, 500, http_500_error, "fopen(%s): %s", path, |
| strerror(ERRNO)); |
| } else { |
| conn->must_close = 1; |
| fclose_on_exec(&file); |
| sq_printf(conn, "HTTP/1.1 200 OK\r\n" |
| "Content-Type: text/html\r\nConnection: %s\r\n\r\n", |
| suggest_connection_header(conn)); |
| send_ssi_file(conn, path, &file, 0); |
| sq_fclose(&file); |
| } |
| } |
| |
| static void send_options(struct sq_connection *conn) { |
| conn->status_code = 200; |
| |
| #ifdef ALLOW_UNSAFE_HTTP_METHODS |
| sq_printf(conn, "%s", "HTTP/1.1 200 OK\r\n" |
| "Allow: GET, POST, HEAD, CONNECT, PUT, DELETE, OPTIONS, PROPFIND, MKCOL\r\n" |
| "DAV: 1\r\n" |
| "Content-Length: 0\r\n\r\n"); |
| #else |
| sq_printf(conn, "%s", "HTTP/1.1 200 OK\r\n" |
| "Allow: GET, POST, HEAD, OPTIONS, PROPFIND, MKCOL\r\n" |
| "Content-Length: 0\r\n\r\n"); |
| #endif |
| } |
| |
| // Writes PROPFIND properties for a collection element |
| static void print_props(struct sq_connection *conn, const char* uri, |
| struct file *filep) { |
| char mtime[64]; |
| gmt_time_string(mtime, sizeof(mtime), &filep->modification_time); |
| conn->num_bytes_sent += sq_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 sq_connection *conn = (struct sq_connection *) data; |
| sq_snprintf(conn, href, sizeof(href), "%s%s", |
| conn->request_info.uri, de->file_name); |
| sq_url_encode(href, href_encoded, PATH_MAX-1); |
| print_props(conn, href_encoded, &de->file); |
| } |
| |
| static void handle_propfind(struct sq_connection *conn, const char *path, |
| struct file *filep) { |
| const char *depth = sq_get_header(conn, "Depth"); |
| |
| conn->must_close = 1; |
| conn->status_code = 207; |
| sq_printf(conn, "HTTP/1.1 207 Multi-Status\r\n" |
| "Connection: close\r\n" |
| "Content-Type: text/xml; charset=utf-8\r\n\r\n"); |
| |
| conn->num_bytes_sent += sq_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 && |
| !sq_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 += sq_printf(conn, "%s\n", "</d:multistatus>"); |
| } |
| |
| #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 |
| |
| 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 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 void send_websocket_handshake(struct sq_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; |
| |
| sq_snprintf(conn, buf, sizeof(buf), "%s%s", |
| sq_get_header(conn, "Sec-WebSocket-Key"), magic); |
| SHA1Init(&sha_ctx); |
| SHA1Update(&sha_ctx, (unsigned char *) buf, strlen(buf)); |
| SHA1Final((unsigned char *) sha, &sha_ctx); |
| base64_encode((unsigned char *) sha, sizeof(sha), b64_sha); |
| sq_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 sq_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 bits, n, stop = 0; |
| size_t i, len, mask_len, data_len, header_len, body_len; |
| // 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[4 * 1024], mask[4], *data; |
| |
| assert(conn->content_len == 0); |
| |
| // Loop continuously, reading messages from the socket, invoking the callback, |
| // and waiting repeatedly until an error occurs. |
| while (!stop) { |
| header_len = 0; |
| // 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 |
| 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) htonl(* (uint32_t *) &buf[2])) << 32) + |
| htonl(* (uint32_t *) &buf[6]); |
| } |
| } |
| |
| // Data layout is as follows: |
| // conn->buf buf |
| // v v frame1 | frame2 |
| // |---------------------|----------------|--------------|------- |
| // | |<--header_len-->|<--data_len-->| |
| // |<-conn->request_len->|<-----body_len----------->| |
| // |<-------------------conn->data_len------------->| |
| |
| if (header_len > 0) { |
| // Allocate space to hold websocket payload |
| data = mem; |
| if (data_len > sizeof(mem) && (data = malloc(data_len)) == NULL) { |
| // Allocation failed, exit the loop and then close the connection |
| // TODO: notify user about the failure |
| break; |
| } |
| |
| // Save mask and bits, otherwise it may be clobbered by memmove below |
| bits = buf[0]; |
| memcpy(mask, buf + header_len - mask_len, mask_len); |
| |
| // Read frame payload into the allocated buffer. |
| assert(body_len >= header_len); |
| if (data_len + header_len > body_len) { |
| len = body_len - header_len; |
| memcpy(data, buf + header_len, len); |
| // TODO: handle pull error |
| pull_all(NULL, conn, data + len, data_len - len); |
| conn->data_len = conn->request_len; |
| } else { |
| len = data_len + header_len; |
| memcpy(data, buf + header_len, data_len); |
| memmove(buf, buf + len, body_len - len); |
| conn->data_len -= len; |
| } |
| |
| // Apply mask if necessary |
| if (mask_len > 0) { |
| for (i = 0; i < data_len; i++) { |
| data[i] ^= mask[i % 4]; |
| } |
| } |
| |
| // Exit the loop if callback signalled to exit, |
| // or "connection close" opcode received. |
| if ((bits & WEBSOCKET_OPCODE_CONNECTION_CLOSE) || |
| (conn->ctx->callbacks.websocket_data != NULL && |
| !conn->ctx->callbacks.websocket_data(conn, bits, data, data_len))) { |
| stop = 1; |
| } |
| |
| if (data != mem) { |
| free(data); |
| } |
| // Not breaking the loop, process next websocket frame. |
| } else { |
| // Buffering websocket request |
| if ((n = pull(NULL, conn, conn->buf + conn->data_len, |
| conn->buf_size - conn->data_len)) <= 0) { |
| break; |
| } |
| conn->data_len += n; |
| } |
| } |
| } |
| |
| int sq_websocket_write(struct sq_connection* conn, int opcode, |
| const char *data, size_t data_len) { |
| unsigned char *copy; |
| size_t copy_len = 0; |
| int retval = -1; |
| |
| if ((copy = (unsigned char *) malloc(data_len + 10)) == NULL) { |
| return -1; |
| } |
| |
| copy[0] = 0x80 + (opcode & 0x0f); |
| |
| // Frame format: http://tools.ietf.org/html/rfc6455#section-5.2 |
| if (data_len < 126) { |
| // Inline 7-bit length field |
| copy[1] = data_len; |
| memcpy(copy + 2, data, data_len); |
| copy_len = 2 + data_len; |
| } else if (data_len <= 0xFFFF) { |
| // 16-bit length field |
| copy[1] = 126; |
| * (uint16_t *) (copy + 2) = htons(data_len); |
| memcpy(copy + 4, data, data_len); |
| copy_len = 4 + data_len; |
| } else { |
| // 64-bit length field |
| copy[1] = 127; |
| * (uint32_t *) (copy + 2) = htonl((uint64_t) data_len >> 32); |
| * (uint32_t *) (copy + 6) = htonl(data_len & 0xffffffff); |
| memcpy(copy + 10, data, data_len); |
| copy_len = 10 + data_len; |
| } |
| |
| // Not thread safe |
| if (copy_len > 0) { |
| retval = sq_write(conn, copy, copy_len); |
| } |
| free(copy); |
| |
| return retval; |
| } |
| |
| static void handle_websocket_request(struct sq_connection *conn) { |
| const char *version = sq_get_header(conn, "Sec-WebSocket-Version"); |
| if (version == NULL || strcmp(version, "13") != 0) { |
| send_http_error(conn, 426, "Upgrade Required", "%s", "Upgrade Required"); |
| } else if (conn->ctx->callbacks.websocket_connect != NULL && |
| conn->ctx->callbacks.websocket_connect(conn) != 0) { |
| // Callback has returned non-zero, do not proceed with handshake |
| } else { |
| send_websocket_handshake(conn); |
| if (conn->ctx->callbacks.websocket_ready != NULL) { |
| conn->ctx->callbacks.websocket_ready(conn); |
| } |
| read_websocket(conn); |
| } |
| } |
| |
| static int is_websocket_request(const struct sq_connection *conn) { |
| const char *host, *upgrade, *connection, *version, *key; |
| |
| host = sq_get_header(conn, "Host"); |
| upgrade = sq_get_header(conn, "Upgrade"); |
| connection = sq_get_header(conn, "Connection"); |
| key = sq_get_header(conn, "Sec-WebSocket-Key"); |
| version = sq_get_header(conn, "Sec-WebSocket-Version"); |
| |
| return host != NULL && upgrade != NULL && connection != NULL && |
| key != NULL && version != NULL && |
| sq_strcasestr(upgrade, "websocket") != NULL && |
| sq_strcasestr(connection, "Upgrade") != 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, vec.len, uri) > 0) { |
| throttle = (int) v; |
| } |
| } |
| |
| return throttle; |
| } |
| |
| static uint32_t get_remote_ip(const struct sq_connection *conn) { |
| return ntohl(* (uint32_t *) &conn->client.rsa.sin.sin_addr); |
| } |
| |
| #ifdef USE_LUA |
| #include "mod_lua.c" |
| #endif // USE_LUA |
| |
| int sq_upload(struct sq_connection *conn, const char *destination_dir) { |
| const char *content_type_header, *boundary_start; |
| char buf[SQ_BUF_LEN], path[PATH_MAX], fname[1024], boundary[100], *s; |
| FILE *fp; |
| int bl, n, i, j, headers_len, boundary_len, eof, |
| len = 0, num_uploaded_files = 0; |
| |
| // 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 = sq_get_header(conn, "Content-Type")) == NULL || |
| (boundary_start = sq_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_len = strlen(boundary); |
| bl = boundary_len + 4; // \r\n--<boundary> |
| for (;;) { |
| // Pull in headers |
| assert(len >= 0 && len <= (int) sizeof(buf)); |
| while ((n = sq_read(conn, buf + len, sizeof(buf) - len)) > 0) { |
| len += n; |
| } |
| if ((headers_len = get_request_len(buf, len)) <= 0) { |
| break; |
| } |
| |
| // Fetch file name. |
| fname[0] = '\0'; |
| for (i = j = 0; i < headers_len; i++) { |
| if (buf[i] == '\r' && buf[i + 1] == '\n') { |
| buf[i] = buf[i + 1] = '\0'; |
| // TODO(lsm): don't expect filename to be the 3rd field, |
| // parse the header properly instead. |
| sscanf(&buf[j], "Content-Disposition: %*s %*s filename=\"%1023[^\"]", |
| fname); |
| j = i + 2; |
| } |
| } |
| |
| // Give up if the headers are not what we expect |
| if (fname[0] == '\0') { |
| break; |
| } |
| |
| // Move data to the beginning of the buffer |
| assert(len >= headers_len); |
| memmove(buf, &buf[headers_len], len - headers_len); |
| len -= headers_len; |
| |
| // 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; |
| // Construct destination file name. Do not allow paths to have slashes. |
| if ((s = strrchr(fname, '/')) == NULL && |
| (s = strrchr(fname, '\\')) == NULL) { |
| s = fname; |
| } |
| |
| // Open file in binary mode. TODO: set an exclusive lock. |
| snprintf(path, sizeof(path), "%s/%s", destination_dir, s); |
| if ((fp = fopen(path, "wb")) == NULL) { |
| break; |
| } |
| |
| // 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 = sq_read(conn, buf + len, sizeof(buf) - len)) > 0); |
| fclose(fp); |
| if (eof) { |
| num_uploaded_files++; |
| if (conn->ctx->callbacks.upload != NULL) { |
| conn->ctx->callbacks.upload(conn, path); |
| } |
| } |
| } |
| |
| return num_uploaded_files; |
| } |
| |
| static int is_put_or_delete_request(const struct sq_connection *conn) { |
| const char *s = conn->request_info.request_method; |
| return s != NULL && (!strcmp(s, "PUT") || |
| !strcmp(s, "DELETE") || |
| !strcmp(s, "MKCOL")); |
| } |
| |
| static int get_first_ssl_listener_index(const struct sq_context *ctx) { |
| int i, index = -1; |
| for (i = 0; index == -1 && i < ctx->num_listening_sockets; i++) { |
| index = ctx->listening_sockets[i].is_ssl ? i : -1; |
| } |
| return index; |
| } |
| |
| static void redirect_to_https_port(struct sq_connection *conn, int ssl_index) { |
| char host[1025]; |
| const char *host_header; |
| |
| if ((host_header = sq_get_header(conn, "Host")) == NULL || |
| sscanf(host_header, "%1024[^:]", host) == 0) { |
| // Cannot get host from the Host: header. Fallback to our IP address. |
| sockaddr_to_string(host, sizeof(host), &conn->client.lsa); |
| } |
| |
| sq_printf(conn, "HTTP/1.1 302 Found\r\nLocation: https://%s:%d%s\r\n\r\n", |
| host, (int) ntohs(conn->ctx->listening_sockets[ssl_index]. |
| lsa.sin.sin_port), conn->request_info.uri); |
| } |
| |
| // This is the heart of the Squeasel's logic. |
| // This function is called when the request is read, parsed and validated, |
| // and Squeasel must decide what action to take: serve a file, or |
| // a directory, or call embedded function, etcetera. |
| static void handle_request(struct sq_connection *conn) { |
| struct sq_request_info *ri = &conn->request_info; |
| char path[PATH_MAX]; |
| int uri_len, ssl_index; |
| struct file file = STRUCT_FILE_INITIALIZER; |
| sq_callback_result_t callback_result = SQ_HANDLED_OK; |
| |
| if ((conn->request_info.query_string = strchr(ri->uri, '?')) != NULL) { |
| * ((char *) conn->request_info.query_string++) = '\0'; |
| } |
| uri_len = (int) strlen(ri->uri); |
| sq_url_decode(ri->uri, uri_len, (char *) ri->uri, uri_len + 1, 0); |
| remove_double_dots_and_double_slashes((char *) ri->uri); |
| convert_uri_to_file_name(conn, path, sizeof(path), &file); |
| conn->throttle = set_throttle(conn->ctx->config[THROTTLE], |
| get_remote_ip(conn), ri->uri); |
| |
| DEBUG_TRACE(("%s", ri->uri)); |
| // Perform redirect and auth checks before calling begin_request() handler. |
| // Otherwise, begin_request() would need to perform auth checks and redirects. |
| if (!conn->client.is_ssl && conn->client.ssl_redir && |
| (ssl_index = get_first_ssl_listener_index(conn->ctx)) > -1) { |
| redirect_to_https_port(conn, ssl_index); |
| } else if (!is_put_or_delete_request(conn) && |
| !check_authorization(conn, path)) { |
| send_authorization_request(conn); |
| } else if (conn->ctx->callbacks.begin_request != NULL && |
| ((callback_result = conn->ctx->callbacks.begin_request(conn)) |
| != SQ_CONTINUE_HANDLING)) { |
| // Do nothing, callback has served the request |
| conn->must_close = (callback_result == SQ_HANDLED_CLOSE_CONNECTION); |
| #if defined(USE_WEBSOCKET) |
| } else if (is_websocket_request(conn)) { |
| handle_websocket_request(conn); |
| #endif |
| } else if (!strcmp(ri->request_method, "OPTIONS")) { |
| send_options(conn); |
| } else if (conn->ctx->config[DOCUMENT_ROOT] == NULL) { |
| send_http_error(conn, 404, "Not Found", "Not Found"); |
| } else if (is_put_or_delete_request(conn) && |
| (is_authorized_for_put(conn) != 1)) { |
| send_authorization_request(conn); |
| } else if (!strcmp(ri->request_method, "PUT")) { |
| put_file(conn, path); |
| } else if (!strcmp(ri->request_method, "MKCOL")) { |
| mkcol(conn, path); |
| } else if (!strcmp(ri->request_method, "DELETE")) { |
| struct de de; |
| memset(&de.file, 0, sizeof(de.file)); |
| if(!sq_stat(conn, path, &de.file)) { |
| send_http_error(conn, 404, "Not Found", "%s", "File not found"); |
| } else { |
| if(de.file.modification_time) { |
| if(de.file.is_directory) { |
| remove_directory(conn, path); |
| send_http_error(conn, 204, "No Content", "%s", ""); |
| } else if (sq_remove(path) == 0) { |
| send_http_error(conn, 204, "No Content", "%s", ""); |
| } else { |
| send_http_error(conn, 423, "Locked", "remove(%s): %s", path, |
| strerror(ERRNO)); |
| } |
| } |
| else { |
| send_http_error(conn, 500, http_500_error, "remove(%s): %s", path, |
| strerror(ERRNO)); |
| } |
| } |
| } else if ((file.membuf == NULL && file.modification_time == (time_t) 0) || |
| must_hide_file(conn, path)) { |
| send_http_error(conn, 404, "Not Found", "%s", "File not found"); |
| } else if (file.is_directory && ri->uri[uri_len - 1] != '/') { |
| sq_printf(conn, "HTTP/1.1 301 Moved Permanently\r\n" |
| "Location: %s/\r\n\r\n", ri->uri); |
| } else if (!strcmp(ri->request_method, "PROPFIND")) { |
| handle_propfind(conn, path, &file); |
| } else if (file.is_directory && |
| !substitute_index_file(conn, path, sizeof(path), &file)) { |
| if (!sq_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes")) { |
| handle_directory_request(conn, path); |
| } else { |
| send_http_error(conn, 403, "Directory Listing Denied", |
| "Directory listing denied"); |
| } |
| #ifdef USE_LUA |
| } else if (match_prefix("**.lp$", 6, path) > 0) { |
| handle_lsp_request(conn, path, &file, NULL); |
| #endif |
| #if !defined(NO_CGI) |
| } else if (match_prefix(conn->ctx->config[CGI_EXTENSIONS], |
| strlen(conn->ctx->config[CGI_EXTENSIONS]), |
| path) > 0) { |
| if (strcmp(ri->request_method, "POST") && |
| strcmp(ri->request_method, "HEAD") && |
| strcmp(ri->request_method, "GET")) { |
| send_http_error(conn, 501, "Not Implemented", |
| "Method %s is not implemented", ri->request_method); |
| } else { |
| handle_cgi_request(conn, path); |
| } |
| #endif // !NO_CGI |
| } else if (match_prefix(conn->ctx->config[SSI_EXTENSIONS], |
| strlen(conn->ctx->config[SSI_EXTENSIONS]), |
| path) > 0) { |
| handle_ssi_file_request(conn, path); |
| } else if (is_not_modified(conn, &file)) { |
| send_http_error(conn, 304, "Not Modified", "%s", ""); |
| } else { |
| handle_file_request(conn, path, &file); |
| } |
| } |
| |
| static void close_all_listening_sockets(struct sq_context *ctx) { |
| int i; |
| for (i = 0; i < ctx->num_listening_sockets; i++) { |
| closesocket(ctx->listening_sockets[i].sock); |
| } |
| free(ctx->listening_sockets); |
| } |
| |
| 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, ch, port; |
| int len; |
| #if defined(USE_IPV6) |
| char buf[100]; |
| #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[^]]]:%d%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. |
| } |
| |
| 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 sq_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; |
| |
| while (success && (list = next_option(list, &vec, NULL)) != NULL) { |
| if (!parse_port_string(&vec, &so)) { |
| 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) { |
| 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, |
| (void *) &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) { |
| cry(fc(ctx), "%s: cannot bind to %.*s: %d (%s)", __func__, |
| (int) vec.len, vec.ptr, ERRNO, strerror(errno)); |
| closesocket(so.sock); |
| success = 0; |
| } else if ((ptr = (struct socket *) realloc(ctx->listening_sockets, |
| (ctx->num_listening_sockets + 1) * |
| sizeof(ctx->listening_sockets[0]))) == NULL) { |
| closesocket(so.sock); |
| success = 0; |
| } else { |
| set_close_on_exec(so.sock); |
| ctx->listening_sockets = ptr; |
| ctx->listening_sockets[ctx->num_listening_sockets] = so; |
| ctx->num_listening_sockets++; |
| } |
| } |
| |
| if (!success) { |
| close_all_listening_sockets(ctx); |
| } |
| |
| return success; |
| } |
| |
| static void log_header(const struct sq_connection *conn, const char *header, |
| FILE *fp) { |
| const char *header_value; |
| |
| if ((header_value = sq_get_header(conn, header)) == NULL) { |
| (void) fprintf(fp, "%s", " -"); |
| } else { |
| (void) fprintf(fp, " \"%s\"", header_value); |
| } |
| } |
| |
| static void log_access(const struct sq_connection *conn) { |
| const struct sq_request_info *ri; |
| FILE *fp; |
| char date[64], src_addr[IP_ADDR_STR_LEN]; |
| |
| fp = conn->ctx->config[ACCESS_LOG_FILE] == NULL ? NULL : |
| fopen(conn->ctx->config[ACCESS_LOG_FILE], "a+"); |
| |
| if (fp == NULL) |
| return; |
| |
| struct tm the_time; |
| strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z", |
| localtime_r(&conn->birth_time, &the_time)); |
| |
| 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 sq_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) { |
| cry(fc(ctx), "%s: subnet must be [+|-]x.x.x.x[/x]", __func__); |
| return -1; |
| } |
| |
| if (net == (remote_ip & mask)) { |
| allowed = flag; |
| } |
| } |
| |
| return allowed == '+'; |
| } |
| |
| static int set_uid_option(struct sq_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) { |
| cry(fc(ctx), "%s: unknown user [%s]", __func__, uid); |
| } else if (setgid(pw->pw_gid) == -1) { |
| cry(fc(ctx), "%s: setgid(%s): %s", __func__, uid, strerror(errno)); |
| } else if (setuid(pw->pw_uid) == -1) { |
| cry(fc(ctx), "%s: setuid(%s): %s", __func__, uid, strerror(errno)); |
| } else { |
| success = 1; |
| } |
| } |
| |
| return success; |
| } |
| |
| #if !defined(NO_SSL) |
| |
| static pthread_mutex_t *ssl_mutexes; |
| |
| static int sslize(struct sq_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 |
| 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(); |
| } |
| |
| static int ssl_password_callback(char *password, int size, int unused, void *data) { |
| struct sq_context *ctx = (struct sq_context*)data; |
| strncpy(password, ctx->config[SSL_PRIVATE_KEY_PASSWORD], size); |
| // See https://www.openssl.org/docs/manmaster/ssl/SSL_CTX_set_default_passwd_cb.html |
| // which strongly hints that password must be NULL terminated. |
| password[size - 1] = '\0'; |
| return strlen(password); |
| } |
| |
| // Dynamically load SSL library. Set up ctx->ssl_ctx pointer. |
| static int set_ssl_option(struct sq_context *ctx) { |
| int i, size; |
| const char *pem; |
| |
| // 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; |
| } |
| |
| const char *private_key = ctx->config[SSL_PRIVATE_KEY]; |
| if (private_key == NULL) private_key = pem; |
| |
| // Initialize SSL library, unless the user has disabled this. |
| int should_init_ssl = (sq_strcasecmp(ctx->config[SSL_GLOBAL_INIT], "yes") == 0); |
| if (should_init_ssl) { |
| SSL_library_init(); |
| SSL_load_error_strings(); |
| // 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 *) malloc((size_t)size)) == NULL) { |
| 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); |
| } |
| |
| char* ssl_version = ctx->config[SSL_VERSION]; |
| int options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3; |
| if (sq_strcasecmp(ssl_version, "tlsv1") == 0) { |
| // No-op - don't exclude any TLS protocols. |
| } else if (sq_strcasecmp(ssl_version, "tlsv1.1") == 0) { |
| if (SSLeay() < OPENSSL_MIN_VERSION_WITH_TLS_1_1) { |
| cry(fc(ctx), "Unsupported TLS version: %s", ssl_version); |
| return 0; |
| } |
| options |= SSL_OP_NO_TLSv1; |
| } else if (sq_strcasecmp(ssl_version, "tlsv1.2") == 0) { |
| if (SSLeay() < OPENSSL_MIN_VERSION_WITH_TLS_1_1) { |
| cry(fc(ctx), "Unsupported TLS version: %s", ssl_version); |
| return 0; |
| } |
| options |= (SSL_OP_NO_TLSv1 | SSL_OP_NO_TLSv1_1); |
| } else { |
| cry(fc(ctx), "%s: unknown SSL version: %s", __func__, ssl_version); |
| return 0; |
| } |
| |
| ctx->ssl_ctx = SSL_CTX_new(SSLv23_method()); |
| if (ctx->ssl_ctx == NULL) { |
| unsigned long err_code = ERR_peek_error(); |
| // If it looks like the error is due to SSL not being initialized, |
| // provide a better error. |
| if (!should_init_ssl && |
| ERR_GET_LIB(err_code) == ERR_LIB_SSL && |
| ERR_GET_REASON(err_code) == SSL_R_LIBRARY_HAS_NO_CIPHERS) { |
| cry(fc(ctx), "SSL_CTX_new failed: %s was disabled: OpenSSL must " |
| "be initialized before starting squeasel", |
| config_options[SSL_GLOBAL_INIT * 2]); |
| } |
| cry(fc(ctx), "SSL_CTX_new (server) error: %s", ssl_error()); |
| return 0; |
| } |
| |
| if ((SSL_CTX_set_options(ctx->ssl_ctx, options) & options) != options) { |
| cry(fc(ctx), "SSL_CTX_set_options (server) error: could not set options (%d)", |
| options); |
| return 0; |
| } |
| |
| if (ctx->config[SSL_PRIVATE_KEY_PASSWORD] != NULL) { |
| SSL_CTX_set_default_passwd_cb(ctx->ssl_ctx, ssl_password_callback); |
| SSL_CTX_set_default_passwd_cb_userdata(ctx->ssl_ctx, ctx); |
| } |
| |
| // If user callback returned non-NULL, that means that user callback has |
| // set up certificate itself. In this case, skip sertificate setting. |
| if ((ctx->callbacks.init_ssl == NULL || |
| !ctx->callbacks.init_ssl(ctx->ssl_ctx, ctx->user_data)) && |
| (SSL_CTX_use_certificate_file(ctx->ssl_ctx, pem, 1) == 0 || |
| SSL_CTX_use_PrivateKey_file(ctx->ssl_ctx, private_key, 1) == 0)) { |
| 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); |
| } |
| |
| if (ctx->config[SSL_CIPHERS] != NULL) { |
| if (SSL_CTX_set_cipher_list(ctx->ssl_ctx, ctx->config[SSL_CIPHERS]) == 0) { |
| cry(fc(ctx), "SSL_CTX_set_cipher_list: error setting ciphers (%s): %s", |
| ctx->config[SSL_CIPHERS], ssl_error()); |
| return 0; |
| } |
| #ifndef OPENSSL_NO_ECDH |
| #if OPENSSL_VERSION_NUMBER < 0x10002000L |
| // OpenSSL 1.0.1 and below only support setting a single ECDH curve at once. |
| // We choose prime256v1 because it's the first curve listed in the "modern |
| // compatibility" section of the Mozilla Server Side TLS recommendations, |
| // accessed Feb. 2017. |
| EC_KEY* ecdh = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1); |
| if (ecdh == NULL) { |
| cry(fc(ctx), "EC_KEY_new_by_curve_name: %s", ssl_error()); |
| } else { |
| int rc = SSL_CTX_set_tmp_ecdh(ctx->ssl_ctx, ecdh); |
| if (rc <= 0) { |
| cry(fc(ctx), "SSL_CTX_set_tmp_ecdh: %s", ssl_error()); |
| } |
| EC_KEY_free(ecdh); |
| } |
| #elif OPENSSL_VERSION_NUMBER < 0x10100000L |
| // OpenSSL 1.0.2 provides the set_ecdh_auto API which internally figures out |
| // the best curve to use. |
| int rc = SSL_CTX_set_ecdh_auto(ctx->ssl_ctx, 1); |
| if (rc <= 0) { |
| cry(fc(ctx), "SSL_CTX_set_ecdh_auto: %s", ssl_error()); |
| } |
| #endif |
| #endif |
| |
| } |
| |
| return 1; |
| } |
| |
| static void uninitialize_ssl(struct sq_context *ctx) { |
| int i; |
| if (ctx->ssl_ctx != NULL && |
| sq_strcasecmp(ctx->config[SSL_GLOBAL_INIT], "yes") == 0) { |
| CRYPTO_set_locking_callback(NULL); |
| for (i = 0; i < CRYPTO_num_locks(); i++) { |
| pthread_mutex_destroy(&ssl_mutexes[i]); |
| } |
| CRYPTO_set_id_callback(NULL); |
| } |
| } |
| #endif // !NO_SSL |
| |
| static int set_gpass_option(struct sq_context *ctx) { |
| struct file file = STRUCT_FILE_INITIALIZER; |
| const char *path = ctx->config[GLOBAL_PASSWORDS_FILE]; |
| if (path != NULL && !sq_stat(fc(ctx), path, &file)) { |
| cry(fc(ctx), "Cannot open %s: %s", path, strerror(ERRNO)); |
| return 0; |
| } |
| return 1; |
| } |
| |
| static int set_acl_option(struct sq_context *ctx) { |
| return check_acl(ctx, (uint32_t) 0x7f000001UL) != -1; |
| } |
| |
| static void reset_per_request_attributes(struct sq_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; |
| } |
| |
| static void close_socket_gracefully(struct sq_connection *conn) { |
| 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; |
| setsockopt(conn->client.sock, SOL_SOCKET, SO_LINGER, |
| (char *) &linger, sizeof(linger)); |
| |
| // Send FIN to the client |
| shutdown(conn->client.sock, SHUT_WR); |
| set_non_blocking_mode(conn->client.sock); |
| |
| // Now we know that our FIN is ACK-ed, safe to close |
| closesocket(conn->client.sock); |
| } |
| |
| static void close_connection(struct sq_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; |
| } |
| } |
| |
| void sq_close_connection(struct sq_connection *conn) { |
| #ifndef NO_SSL |
| if (conn->client_ssl_ctx != NULL) { |
| SSL_CTX_free((SSL_CTX *) conn->client_ssl_ctx); |
| } |
| #endif |
| close_connection(conn); |
| free(conn); |
| } |
| |
| struct sq_connection *sq_connect(const char *host, int port, int use_ssl, |
| char *ebuf, size_t ebuf_len) { |
| static struct sq_context fake_ctx; |
| struct sq_connection *conn = NULL; |
| SOCKET sock; |
| |
| if ((sock = conn2(host, port, use_ssl, ebuf, ebuf_len)) == INVALID_SOCKET) { |
| } else if ((conn = (struct sq_connection *) |
| 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); |
| 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; |
| getsockname(sock, &conn->client.rsa.sa, &len); |
| conn->client.is_ssl = use_ssl; |
| #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'); |
| } |
| |
| |
| typedef enum { |
| GETREQ_OK, |
| GETREQ_KEEPALIVE_TIMEOUT, |
| GETREQ_ERROR |
| } GetReqResult; |
| |
| static GetReqResult getreq(struct sq_connection *conn, char *ebuf, size_t ebuf_len) { |
| const char *cl; |
| |
| ebuf[0] = '\0'; |
| reset_per_request_attributes(conn); |
| 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"); |
| return GETREQ_ERROR; |
| } else if (conn->request_len <= 0) { |
| return GETREQ_KEEPALIVE_TIMEOUT; |
| } 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); |
| return GETREQ_ERROR; |
| } else { |
| // Request is valid |
| if ((cl = get_header(&conn->request_info, "Content-Length")) != NULL) { |
| conn->content_len = strtoll(cl, NULL, 10); |
| } else if (!sq_strcasecmp(conn->request_info.request_method, "POST") || |
| !sq_strcasecmp(conn->request_info.request_method, "PUT")) { |
| conn->content_len = -1; |
| } else { |
| conn->content_len = 0; |
| } |
| conn->birth_time = time(NULL); |
| } |
| return GETREQ_OK; |
| } |
| |
| struct sq_connection *sq_download(const char *host, int port, int use_ssl, |
| char *ebuf, size_t ebuf_len, |
| const char *fmt, ...) { |
| struct sq_connection *conn; |
| va_list ap; |
| |
| va_start(ap, fmt); |
| ebuf[0] = '\0'; |
| if ((conn = sq_connect(host, port, use_ssl, ebuf, ebuf_len)) == NULL) { |
| } else if (sq_vprintf(conn, fmt, ap) <= 0) { |
| snprintf(ebuf, ebuf_len, "%s", "Error sending request"); |
| } else { |
| getreq(conn, ebuf, ebuf_len); |
| } |
| if (ebuf[0] != '\0' && conn != NULL) { |
| sq_close_connection(conn); |
| conn = NULL; |
| } |
| va_end(ap); |
| |
| return conn; |
| } |
| |
| static void process_new_connection(struct sq_connection *conn) { |
| struct sq_request_info *ri = &conn->request_info; |
| int keep_alive_enabled, keep_alive, discard_len; |
| char ebuf[100]; |
| GetReqResult getreq_status; |
| |
| keep_alive_enabled = !strcmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes"); |
| keep_alive = 0; |
| |
| // Important: on new connection, reset the receiving buffer. Credit goes |
| // to crule42. |
| conn->data_len = 0; |
| do { |
| getreq_status = getreq(conn, ebuf, sizeof(ebuf)); |
| if (getreq_status != GETREQ_OK) { |
| if (getreq_status == GETREQ_ERROR) { |
| send_http_error(conn, 500, "Server Error", "%s", ebuf); |
| } |
| conn->must_close = 1; |
| } else if (!is_valid_uri(conn->request_info.uri)) { |
| char* encoded = (char*) malloc(SQ_BUF_LEN); |
| sq_strip_tags(ri->uri, encoded, SQ_BUF_LEN); |
| snprintf(ebuf, sizeof(ebuf), "Invalid URI: [%s]", encoded); |
| free(encoded); |
| send_http_error(conn, 400, "Bad Request", "%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, "Bad HTTP version", "%s", ebuf); |
| } |
| |
| if (getreq_status == GETREQ_OK) { |
| 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) { |
| 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 sq_context *ctx, struct socket *sp) { |
| (void) pthread_mutex_lock(&ctx->mutex); |
| DEBUG_TRACE(("going idle")); |
| |
| // If the queue is empty, wait. We're idle at this point. |
| // If a request doesn't come within WORKER_THREAD_TIMEOUT_SECS, |
| // we'll stop waiting and shut down the thread. |
| while (ctx->sq_head == ctx->sq_tail && ctx->stop_flag == 0) { |
| struct timespec timeout; |
| #ifdef __linux__ |
| if (clock_gettime(CLOCK_MONOTONIC, &timeout) != 0) { |
| perror("Unable to get CLOCK_MONOTONIC"); |
| abort(); // CLOCK_MONOTONIC should always be supported |
| } |
| #elif defined(__MACH__) |
| clock_serv_t cclock; |
| mach_timespec_t mts; |
| host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock); |
| clock_get_time(cclock, &mts); |
| mach_port_deallocate(mach_task_self(), cclock); |
| timeout.tv_sec = mts.tv_sec; |
| timeout.tv_nsec = (long) mts.tv_nsec; |
| #endif |
| |
| ctx->num_free_threads++; |
| assert(ctx->num_free_threads <= ctx->num_threads); |
| timeout.tv_sec += WORKER_THREAD_TIMEOUT_SECS; |
| int err = pthread_cond_timedwait(&ctx->sq_full, &ctx->mutex, &timeout); |
| ctx->num_free_threads--; |
| if (err == ETIMEDOUT && ctx->sq_head == ctx->sq_tail) { |
| DEBUG_TRACE(("worker thread timed out waiting for new connection")); |
| // We didn't get signaled, and there's nothing in the queue. |
| (void) pthread_mutex_unlock(&ctx->mutex); |
| return 0; |
| } else if (err != 0 && err != ETIMEDOUT) { |
| cry(fc(ctx), "%s: %s", "Failed timedwait", strerror(err)); |
| } |
| } |
| |
| // 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)); |
| assert(ctx->num_free_threads <= ctx->num_threads); |
| |
| // 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->mutex); |
| |
| return !ctx->stop_flag; |
| } |
| |
| static void *worker_thread(void *thread_func_param) { |
| #ifdef __linux__ |
| (void)prctl(PR_SET_NAME, "sq_worker"); |
| #elif defined(__MACH__) |
| pthread_setname_np("sq_worker"); |
| #endif |
| |
| struct sq_context *ctx = (struct sq_context *) thread_func_param; |
| struct sq_connection *conn; |
| |
| conn = (struct sq_connection *) calloc(1, sizeof(*conn) + MAX_REQUEST_SIZE); |
| if (conn == NULL) { |
| cry(fc(ctx), "%s", "Cannot create new connection struct, OOM"); |
| } else { |
| conn->buf_size = MAX_REQUEST_SIZE; |
| conn->buf = (char *) (conn + 1); |
| conn->ctx = ctx; |
| conn->request_info.user_data = ctx->user_data; |
| |
| // 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); |
| 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); |
| 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); |
| } |
| free(conn); |
| } |
| |
| // Signal master that we're done with connection and exiting |
| (void) pthread_mutex_lock(&ctx->mutex); |
| ctx->num_threads--; |
| (void) pthread_cond_signal(&ctx->cond); |
| assert(ctx->num_threads >= 0); |
| (void) pthread_mutex_unlock(&ctx->mutex); |
| |
| DEBUG_TRACE(("exiting")); |
| return NULL; |
| } |
| |
| static void try_start_another_worker(struct sq_context *ctx) { |
| // REQUIRES: ctx->mutex is locked |
| if (ctx->num_threads >= ctx->max_threads) { |
| return; |
| } |
| |
| if (sq_start_thread(worker_thread, ctx) != 0) { |
| cry(fc(ctx), "Cannot start worker thread: %ld", (long) ERRNO); |
| } else { |
| ctx->num_threads++; |
| } |
| } |
| |
| |
| // Master thread adds accepted socket to a queue |
| static void produce_socket(struct sq_context *ctx, const struct socket *sp) { |
| (void) pthread_mutex_lock(&ctx->mutex); |
| |
| // If all of the worker threads are busy, then start another worker thread |
| // to handle this request, assuming the limit isn't yet hit. |
| if (ctx->num_free_threads == 0) { |
| try_start_another_worker(ctx); |
| } |
| |
| // If the queue is full, wait |
| while (ctx->stop_flag == 0 && |
| ctx->sq_head - ctx->sq_tail >= (int) ARRAY_SIZE(ctx->queue)) { |
| |
| DEBUG_TRACE(("queue is full - waiting")); |
| (void) pthread_cond_wait(&ctx->sq_empty, &ctx->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->mutex); |
| } |
| |
| static int set_sock_timeout(SOCKET sock, int milliseconds) { |
| struct timeval t; |
| t.tv_sec = milliseconds / 1000; |
| t.tv_usec = (milliseconds * 1000) % 1000000; |
| return setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (void *) &t, sizeof(t)) || |
| setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (void *) &t, sizeof(t)); |
| } |
| |
| static void accept_new_connection(const struct socket *listener, |
| struct sq_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); |
| cry(fc(ctx), "%s: %s is not allowed to connect", __func__, src_addr); |
| closesocket(so.sock); |
| } else { |
| // Put so socket structure into the queue |
| DEBUG_TRACE(("Accepted socket %d", (int) so.sock)); |
| set_close_on_exec(so.sock); |
| so.is_ssl = listener->is_ssl; |
| so.ssl_redir = listener->ssl_redir; |
| getsockname(so.sock, &so.lsa.sa, &len); |
| // 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. |
| setsockopt(so.sock, SOL_SOCKET, SO_KEEPALIVE, (void *) &on, sizeof(on)); |
| set_sock_timeout(so.sock, atoi(ctx->config[REQUEST_TIMEOUT])); |
| produce_socket(ctx, &so); |
| } |
| } |
| |
| static void *master_thread(void *thread_func_param) { |
| #ifdef __linux__ |
| (void)prctl(PR_SET_NAME, "sq_acceptor"); |
| #elif defined(__MACH__) |
| pthread_setname_np("sq_acceptor"); |
| #endif |
| |
| struct sq_context *ctx = (struct sq_context *) thread_func_param; |
| struct pollfd *pfd; |
| int i; |
| |
| #if defined(ISSUE_317) |
| // Increase priority of the master thread |
| struct sched_param sched_param; |
| sched_param.sched_priority = sched_get_priority_max(SCHED_RR); |
| pthread_setschedparam(pthread_self(), SCHED_RR, &sched_param); |
| #endif |
| |
| pfd = (struct pollfd *) calloc(ctx->num_listening_sockets + 1, 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; |
| } |
| pfd[ctx->num_listening_sockets].fd = ctx->wakeup_fds[0]; |
| pfd[ctx->num_listening_sockets].events = POLLIN; |
| |
| if (poll(pfd, ctx->num_listening_sockets + 1, 200) > 0) { |
| for (i = 0; i < ctx->num_listening_sockets; i++) { |
| // NOTE(lsm): on QNX, poll() returns POLLRDNORM after the |
| // successfull 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); |
| } |
| } |
| } |
| } |
| free(pfd); |
| DEBUG_TRACE(("stopping workers")); |
| |
| // Stop signal received: somebody called sq_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->mutex); |
| while (ctx->num_threads > 0) { |
| (void) pthread_cond_wait(&ctx->cond, &ctx->mutex); |
| } |
| (void) pthread_mutex_unlock(&ctx->mutex); |
| |
| #if !defined(NO_SSL) |
| uninitialize_ssl(ctx); |
| #endif |
| DEBUG_TRACE(("exiting")); |
| |
| // Signal sq_stop() that we're done. |
| (void) pthread_mutex_lock(&ctx->mutex); |
| ctx->stop_flag = 2; |
| // WARNING: This must be the very last thing this |
| // thread does, as ctx may be freed by sq_stop() as soon as the |
| // mutex is unlocked. |
| (void) pthread_mutex_unlock(&ctx->mutex); |
| return NULL; |
| } |
| |
| static void free_context(struct sq_context *ctx) { |
| int i; |
| |
| // Deallocate config parameters |
| for (i = 0; i < NUM_OPTIONS; i++) { |
| if (ctx->config[i] != NULL) |
| free(ctx->config[i]); |
| } |
| |
| #ifndef NO_SSL |
| // Deallocate SSL context |
| if (ctx->ssl_ctx != NULL) { |
| SSL_CTX_free(ctx->ssl_ctx); |
| } |
| if (ssl_mutexes != NULL) { |
| free(ssl_mutexes); |
| ssl_mutexes = NULL; |
| } |
| #endif // !NO_SSL |
| |
| // If the wakeup fds are open, close them |
| if (ctx->wakeup_fds[0] >= 0) { |
| close(ctx->wakeup_fds[0]); |
| ctx->wakeup_fds[0] = -1; |
| } |
| if (ctx->wakeup_fds[1] >= 0) { |
| close(ctx->wakeup_fds[1]); |
| ctx->wakeup_fds[1] = -1; |
| } |
| |
| // All threads exited, no sync is needed. Destroy mutex and condvars |
| (void) pthread_cond_destroy(&ctx->cond); |
| (void) pthread_cond_destroy(&ctx->sq_empty); |
| (void) pthread_cond_destroy(&ctx->sq_full); |
| (void) pthread_mutex_destroy(&ctx->mutex); |
| |
| // Deallocate context itself |
| free(ctx); |
| } |
| |
| void sq_stop(struct sq_context *ctx) { |
| int unused; |
| char c = 0; |
| |
| (void) pthread_mutex_lock(&ctx->mutex); |
| ctx->stop_flag = 1; |
| (void) pthread_mutex_unlock(&ctx->mutex); |
| |
| if (ctx->wakeup_fds[1] != -1) { |
| RETRY_ON_EINTR(unused, write(ctx->wakeup_fds[1], &c, 1)); |
| } |
| |
| // Wait until sq_fini() stops |
| while (1) { |
| (void) pthread_mutex_lock(&ctx->mutex); |
| int should_stop = (ctx->stop_flag == 2); |
| (void) pthread_mutex_unlock(&ctx->mutex); |
| if (should_stop) break; |
| (void) sq_sleep(10); |
| } |
| |
| free_context(ctx); |
| } |
| |
| struct sq_context *sq_start(const struct sq_callbacks *callbacks, |
| void *user_data, |
| const char **options) { |
| struct sq_context *ctx; |
| const char *name, *value, *default_value; |
| int i; |
| |
| // Allocate context and initialize reasonable general case defaults. |
| // TODO(lsm): do proper error handling here. |
| if ((ctx = (struct sq_context *) calloc(1, sizeof(*ctx))) == NULL) { |
| return NULL; |
| } |
| ctx->callbacks = *callbacks; |
| ctx->user_data = user_data; |
| ctx->wakeup_fds[0] = -1; |
| ctx->wakeup_fds[1] = -1; |
| |
| while (options && (name = *options++) != NULL) { |
| if ((i = get_option_index(name)) == -1) { |
| cry(fc(ctx), "Invalid option: %s", name); |
| free_context(ctx); |
| return NULL; |
| } else if ((value = *options++) == NULL) { |
| cry(fc(ctx), "%s: option value cannot be NULL", name); |
| free_context(ctx); |
| return NULL; |
| } |
| if (ctx->config[i] != NULL) { |
| cry(fc(ctx), "warning: %s: duplicate option", name); |
| free(ctx->config[i]); |
| } |
| ctx->config[i] = sq_strdup(value); |
| DEBUG_TRACE(("[%s] -> [%s]", name, value)); |
| } |
| |
| // Set default value if needed |
| for (i = 0; config_options[i * 2] != NULL; i++) { |
| default_value = config_options[i * 2 + 1]; |
| if (ctx->config[i] == NULL && default_value != NULL) { |
| ctx->config[i] = sq_strdup(default_value); |
| } |
| } |
| |
| // 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) || |
| !set_uid_option(ctx) || |
| !set_acl_option(ctx)) { |
| free_context(ctx); |
| return NULL; |
| } |
| |
| // Ignore SIGPIPE signal, so if browser cancels the request, it |
| // won't kill the whole process. |
| (void) signal(SIGPIPE, SIG_IGN); |
| // Also ignoring SIGCHLD to let the OS to reap zombies properly. |
| (void) signal(SIGCHLD, SIG_IGN); |
| |
| (void) pthread_mutex_init(&ctx->mutex, NULL); |
| |
| pthread_condattr_t attr; |
| |
| pthread_condattr_init(&attr); |
| |
| #ifdef __linux__ |
| if (pthread_condattr_setclock(&attr, CLOCK_MONOTONIC) != 0) { |
| perror("pthread_condattr_setclock"); |
| free_context(ctx); |
| return NULL; |
| } |
| #endif |
| |
| (void) pthread_cond_init(&ctx->cond, &attr); |
| (void) pthread_cond_init(&ctx->sq_empty, &attr); |
| (void) pthread_cond_init(&ctx->sq_full, &attr); |
| |
| // Create a pipe used for sq_stop to wake up the master thread. |
| ctx->wakeup_fds[0] = -1; |
| ctx->wakeup_fds[1] = -1; |
| if (pipe(ctx->wakeup_fds) != 0) { |
| cry(fc(ctx), "Cannot create wakeup_fds: %ld", (long) ERRNO); |
| } else { |
| set_close_on_exec(ctx->wakeup_fds[0]); |
| set_close_on_exec(ctx->wakeup_fds[1]); |
| } |
| |
| ctx->max_threads = atoi(ctx->config[NUM_THREADS]); |
| assert(ctx->max_threads > 0); |
| |
| // Start master (listening) thread. This thread will spawn worker |
| // threads lazily as necessary up to the configured max. |
| sq_start_thread(master_thread, ctx); |
| |
| return ctx; |
| } |