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apache / httpd / 8c07738f7ed9ca6c9711dc2e3c2dc8998e6000fe / . / modules / proxy / proxy_ftp.c
blob: 096d836d9e0512025ff088d35fea5941cb0e0690 [file] [log] [blame]
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* Portions of this software are based upon public domain software
* originally written at the National Center for Supercomputing Applications,
* University of Illinois, Urbana-Champaign.
*/
/* FTP routines for Apache proxy */
#include "mod_proxy.h"
#include "http_main.h"
#include "http_log.h"
#include "http_core.h"
#include "apr_strings.h"
#define AUTODETECT_PWD
static void skiplf(BUFF *foo)
{
char c;
do
{
c = ap_bgetc(foo);
} while(c != '\n');
}
/*
* Decodes a '%' escaped string, and returns the number of characters
*/
static int decodeenc(char *x)
{
int i, j, ch;
if (x[0] == '\0')
return 0; /* special case for no characters */
for (i = 0, j = 0; x[i] != '\0'; i++, j++) {
/* decode it if not already done */
ch = x[i];
if (ch == '%' && ap_isxdigit(x[i + 1]) && ap_isxdigit(x[i + 2])) {
ch = ap_proxy_hex2c(&x[i + 1]);
i += 2;
}
x[j] = ch;
}
x[j] = '\0';
return j;
}
/*
* checks an encoded ftp string for bad characters, namely, CR, LF or
* non-ascii character
*/
static int ftp_check_string(const char *x)
{
int i, ch = 0;
for (i = 0; x[i] != '\0'; i++) {
ch = x[i];
if (ch == '%' && ap_isxdigit(x[i + 1]) && ap_isxdigit(x[i + 2])) {
ch = ap_proxy_hex2c(&x[i + 1]);
i += 2;
}
#if !APR_CHARSET_EBCDIC
if (ch == '\015' || ch == '\012' || (ch & 0x80))
#else /*APR_CHARSET_EBCDIC*/
if (ch == '\r' || ch == '\n' || (os_toascii[ch] & 0x80))
#endif /*APR_CHARSET_EBCDIC*/
return 0;
}
return 1;
}
/*
* Canonicalise ftp URLs.
*/
int ap_proxy_ftp_canon(request_rec *r, char *url)
{
char *user, *password, *host, *path, *parms, *strp, sport[7];
apr_pool_t *p = r->pool;
const char *err;
int port;
port = DEFAULT_FTP_PORT;
err = ap_proxy_canon_netloc(p, &url, &user, &password, &host, &port);
if (err)
return HTTP_BAD_REQUEST;
if (user != NULL && !ftp_check_string(user))
return HTTP_BAD_REQUEST;
if (password != NULL && !ftp_check_string(password))
return HTTP_BAD_REQUEST;
/* now parse path/parameters args, according to rfc1738 */
/* N.B. if this isn't a true proxy request, then the URL path
* (but not query args) has already been decoded.
* This gives rise to the problem of a ; being decoded into the
* path.
*/
strp = strchr(url, ';');
if (strp != NULL) {
*(strp++) = '\0';
parms = ap_proxy_canonenc(p, strp, strlen(strp), enc_parm,
r->proxyreq);
if (parms == NULL)
return HTTP_BAD_REQUEST;
}
else
parms = "";
path = ap_proxy_canonenc(p, url, strlen(url), enc_path, r->proxyreq);
if (path == NULL)
return HTTP_BAD_REQUEST;
if (!ftp_check_string(path))
return HTTP_BAD_REQUEST;
if (r->proxyreq && r->args != NULL) {
if (strp != NULL) {
strp = ap_proxy_canonenc(p, r->args, strlen(r->args), enc_parm, 1);
if (strp == NULL)
return HTTP_BAD_REQUEST;
parms = apr_pstrcat(p, parms, "?", strp, NULL);
}
else {
strp = ap_proxy_canonenc(p, r->args, strlen(r->args), enc_fpath, 1);
if (strp == NULL)
return HTTP_BAD_REQUEST;
path = apr_pstrcat(p, path, "?", strp, NULL);
}
r->args = NULL;
}
/* now, rebuild URL */
if (port != DEFAULT_FTP_PORT)
apr_snprintf(sport, sizeof(sport), ":%d", port);
else
sport[0] = '\0';
r->filename = apr_pstrcat(p, "proxy:ftp://", (user != NULL) ? user : "",
(password != NULL) ? ":" : "",
(password != NULL) ? password : "",
(user != NULL) ? "@" : "", host, sport, "/", path,
(parms[0] != '\0') ? ";" : "", parms, NULL);
return OK;
}
/*
* Returns the ftp status code;
* or -1 on I/O error, 0 on data error
*/
static int ftp_getrc(BUFF *f)
{
int len, status;
char linebuff[100], buff[5];
len = ap_bgets(linebuff, sizeof linebuff, f);
if (len == -1)
return -1;
/* check format */
if (len < 5 || !apr_isdigit(linebuff[0]) || !apr_isdigit(linebuff[1]) ||
!apr_isdigit(linebuff[2]) || (linebuff[3] != ' ' && linebuff[3] != '-'))
status = 0;
else
status = 100 * linebuff[0] + 10 * linebuff[1] + linebuff[2] - 111 * '0';
if (linebuff[len - 1] != '\n') {
skiplf(f);
}
/* skip continuation lines */
if (linebuff[3] == '-') {
memcpy(buff, linebuff, 3);
buff[3] = ' ';
do {
len = ap_bgets(linebuff, sizeof linebuff, f);
if (len == -1)
return -1;
if (linebuff[len - 1] != '\n') {
skiplf(f);
}
} while (memcmp(linebuff, buff, 4) != 0);
}
return status;
}
/*
* Like ftp_getrc but returns both the ftp status code and
* remembers the response message in the supplied buffer
*/
static int ftp_getrc_msg(BUFF *f, char *msgbuf, int msglen)
{
int len, status;
char linebuff[100], buff[5];
char *mb = msgbuf,
*me = &msgbuf[msglen];
len = ap_bgets(linebuff, sizeof linebuff, f);
if (len == -1)
return -1;
if (len < 5 || !apr_isdigit(linebuff[0]) || !apr_isdigit(linebuff[1]) ||
!apr_isdigit(linebuff[2]) || (linebuff[3] != ' ' && linebuff[3] != '-'))
status = 0;
else
status = 100 * linebuff[0] + 10 * linebuff[1] + linebuff[2] - 111 * '0';
mb = apr_cpystrn(mb, linebuff+4, me - mb);
if (linebuff[len - 1] != '\n')
skiplf(f);
if (linebuff[3] == '-') {
memcpy(buff, linebuff, 3);
buff[3] = ' ';
do {
len = ap_bgets(linebuff, sizeof linebuff, f);
if (len == -1)
return -1;
if (linebuff[len - 1] != '\n') {
skiplf(f);
}
mb = apr_cpystrn(mb, linebuff+4, me - mb);
} while (memcmp(linebuff, buff, 4) != 0);
}
return status;
}
static long int send_dir(BUFF *f, request_rec *r, ap_cache_el *c, char *cwd)
{
char buf[IOBUFSIZE];
char buf2[IOBUFSIZE];
char *filename;
int searchidx = 0;
char *searchptr = NULL;
int firstfile = 1;
apr_ssize_t cntr;
unsigned long total_bytes_sent = 0;
register int n, o, w;
conn_rec *con = r->connection;
char *dir, *path, *reldir, *site;
apr_file_t *cachefp = NULL;
if(c) ap_cache_el_data(c, &cachefp);
/* Save "scheme://site" prefix without password */
site = ap_unparse_uri_components(r->pool, &r->parsed_uri, UNP_OMITPASSWORD|UNP_OMITPATHINFO);
/* ... and path without query args */
path = ap_unparse_uri_components(r->pool, &r->parsed_uri, UNP_OMITSITEPART|UNP_OMITQUERY);
(void)decodeenc(path);
/* Copy path, strip (all except the last) trailing slashes */
path = dir = apr_pstrcat(r->pool, path, "/", NULL);
while ((n = strlen(path)) > 1 && path[n-1] == '/' && path[n-2] == '/')
path[n-1] = '\0';
/* print "ftp://host/" */
n = apr_snprintf(buf, sizeof(buf), DOCTYPE_HTML_3_2
"<HTML><HEAD><TITLE>%s%s</TITLE>\n"
"<BASE HREF=\"%s%s\"></HEAD>\n"
"<BODY><H2>Directory of "
"<A HREF=\"/\">%s</A>/",
site, path, site, path, site);
total_bytes_sent += ap_proxy_bputs2(buf, con->client_socket, c);
while ((dir = strchr(dir+1, '/')) != NULL)
{
*dir = '\0';
if ((reldir = strrchr(path+1, '/'))==NULL)
reldir = path+1;
else
++reldir;
/* print "path/" component */
apr_snprintf(buf, sizeof(buf), "<A HREF=\"/%s/\">%s</A>/", path+1, reldir);
total_bytes_sent += ap_proxy_bputs2(buf, con->client_socket, c);
*dir = '/';
}
/* If the caller has determined the current directory, and it differs */
/* from what the client requested, then show the real name */
if (cwd == NULL || strncmp (cwd, path, strlen(cwd)) == 0) {
apr_snprintf(buf, sizeof(buf), "</H2>\n<HR><PRE>");
} else {
apr_snprintf(buf, sizeof(buf), "</H2>\n(%s)\n<HR><PRE>", cwd);
}
total_bytes_sent += ap_proxy_bputs2(buf, con->client_socket, c);
while (!con->aborted) {
n = ap_bgets(buf, sizeof buf, f);
if (n == -1) { /* input error */
if (c != NULL) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"proxy: error reading from cache");
ap_proxy_cache_error(&c);
}
break;
}
if (n == 0)
break; /* EOF */
if (buf[0] == 'l' && (filename=strstr(buf, " -> ")) != NULL) {
char *link_ptr = filename;
do {
filename--;
} while (filename[0] != ' ');
*(filename++) = '\0';
*(link_ptr++) = '\0';
if ((n = strlen(link_ptr)) > 1 && link_ptr[n - 1] == '\n')
link_ptr[n - 1] = '\0';
apr_snprintf(buf2, sizeof(buf2), "%s <A HREF=\"%s\">%s %s</A>\n", buf, filename, filename, link_ptr);
apr_cpystrn(buf, buf2, sizeof(buf));
n = strlen(buf);
}
else if (buf[0] == 'd' || buf[0] == '-' || buf[0] == 'l' || apr_isdigit(buf[0])) {
if (apr_isdigit(buf[0])) { /* handle DOS dir */
searchptr = strchr(buf, '<');
if (searchptr != NULL)
*searchptr = '[';
searchptr = strchr(buf, '>');
if (searchptr != NULL)
*searchptr = ']';
}
filename = strrchr(buf, ' ');
*(filename++) = 0;
filename[strlen(filename) - 1] = 0;
/* handle filenames with spaces in 'em */
if (!strcmp(filename, ".") || !strcmp(filename, "..") || firstfile) {
firstfile = 0;
searchidx = filename - buf;
}
else if (searchidx != 0 && buf[searchidx] != 0) {
*(--filename) = ' ';
buf[searchidx - 1] = 0;
filename = &buf[searchidx];
}
/* Special handling for '.' and '..' */
if (!strcmp(filename, ".") || !strcmp(filename, "..") || buf[0] == 'd') {
apr_snprintf(buf2, sizeof(buf2), "%s <A HREF=\"%s/\">%s</A>\n",
buf, filename, filename);
}
else {
apr_snprintf(buf2, sizeof(buf2), "%s <A HREF=\"%s\">%s</A>\n", buf, filename, filename);
}
apr_cpystrn(buf, buf2, sizeof(buf));
n = strlen(buf);
}
o = 0;
total_bytes_sent += n;
cntr = n;
if (cachefp && apr_file_write(cachefp, buf, &cntr) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"proxy: error writing to cache");
ap_proxy_cache_error(&c);
cachefp = NULL;
}
while (n && !r->connection->aborted) {
cntr = n;
w = apr_send(con->client_socket, &buf[o], &cntr);
if (w <= 0)
break;
n -= w;
o += w;
}
}
total_bytes_sent += ap_proxy_bputs2("</PRE><HR>\n", con->client_socket, c);
total_bytes_sent += ap_proxy_bputs2(ap_psignature("", r), con->client_socket, c);
total_bytes_sent += ap_proxy_bputs2("</BODY></HTML>\n", con->client_socket, c);
/* Flushing the actual socket doesn't make much sense, because we don't
* buffer it yet.
ap_flush(con->client);
*/
return total_bytes_sent;
}
/* Common routine for failed authorization (i.e., missing or wrong password)
* to an ftp service. This causes most browsers to retry the request
* with username and password (which was presumably queried from the user)
* supplied in the Authorization: header.
* Note that we "invent" a realm name which consists of the
* ftp://user@host part of the reqest (sans password -if supplied but invalid-)
*/
static int ftp_unauthorized (request_rec *r, int log_it)
{
r->proxyreq = 0;
/* Log failed requests if they supplied a password
* (log username/password guessing attempts)
*/
if (log_it)
ap_log_rerror(APLOG_MARK, APLOG_INFO|APLOG_NOERRNO, 0, r,
"proxy: missing or failed auth to %s",
ap_unparse_uri_components(r->pool,
&r->parsed_uri, UNP_OMITPATHINFO));
apr_table_setn(r->err_headers_out, "WWW-Authenticate",
apr_pstrcat(r->pool, "Basic realm=\"",
ap_unparse_uri_components(r->pool, &r->parsed_uri,
UNP_OMITPASSWORD|UNP_OMITPATHINFO),
"\"", NULL));
return HTTP_UNAUTHORIZED;
}
/*
* Handles direct access of ftp:// URLs
* Original (Non-PASV) version from
* Troy Morrison <spiffnet@zoom.com>
* PASV added by Chuck
*/
int ap_proxy_ftp_handler(request_rec *r, ap_cache_el *c, char *url)
{
char *host, *path, *strp, *parms;
char *cwd = NULL;
char *user = NULL;
/* char *account = NULL; how to supply an account in a URL? */
const char *password = NULL;
apr_socket_t *sock, *dsock, *inc;
int port, i, j, len, rc, nocache = 0;
apr_socket_t *csd;
struct in_addr destaddr;
apr_table_t *resp_hdrs;
BUFF *f;
BUFF *data = NULL;
apr_file_t *cachefp = NULL;
apr_pool_t *p = r->pool;
int one = 1;
const long int zero = 0L;
void *sconf = r->server->module_config;
proxy_server_conf *conf =
(proxy_server_conf *) ap_get_module_config(sconf, &proxy_module);
struct noproxy_entry *npent = (struct noproxy_entry *) conf->noproxies->elts;
struct nocache_entry *ncent = (struct nocache_entry *) conf->nocaches->elts;
apr_sockaddr_t *localsa;
/* stuff for PASV mode */
unsigned int presult, h0, h1, h2, h3, p0, p1;
unsigned short pport;
int pasvmode = 0;
char pasv[64];
char *pstr, dates[AP_RFC822_DATE_LEN];
char *npaddr;
apr_port_t npport;
/* stuff for responses */
char resp[MAX_STRING_LEN];
char *size = NULL;
/* we only support GET and HEAD */
if (r->method_number != M_GET)
return HTTP_NOT_IMPLEMENTED;
/* We break the URL into host, port, path-search */
host = r->parsed_uri.hostname;
port = (r->parsed_uri.port != 0)
? r->parsed_uri.port
: ap_default_port_for_request(r);
path = apr_pstrdup(p, r->parsed_uri.path);
path = (path != NULL && path[0] != '\0') ? &path[1] : "";
/* The "Authorization:" header must be checked first.
* We allow the user to "override" the URL-coded user [ & password ]
* in the Browsers' User&Password Dialog.
* NOTE that this is only marginally more secure than having the
* password travel in plain as part of the URL, because Basic Auth
* simply uuencodes the plain text password.
* But chances are still smaller that the URL is logged regularly.
*/
if ((password = apr_table_get(r->headers_in, "Authorization")) != NULL
&& strcasecmp(ap_getword(r->pool, &password, ' '), "Basic") == 0
&& (password = ap_pbase64decode(r->pool, password))[0] != ':') {
/* Note that this allocation has to be made from r->connection->pool
* because it has the lifetime of the connection. The other allocations
* are temporary and can be tossed away any time.
*/
user = ap_getword_nulls (r->pool, &password, ':');
r->ap_auth_type = "Basic";
r->user = r->parsed_uri.user = user;
nocache = 1; /* This resource only accessible with username/password */
}
else if ((user = r->parsed_uri.user) != NULL) {
user = apr_pstrdup(p, user);
decodeenc(user);
if ((password = r->parsed_uri.password) != NULL) {
char *tmp = apr_pstrdup(p, password);
decodeenc(tmp);
password = tmp;
}
nocache = 1; /* This resource only accessible with username/password */
}
else {
user = "anonymous";
password = "apache_proxy@";
}
/* check if ProxyBlock directive on this host */
destaddr.s_addr = ap_inet_addr(host);
for (i = 0; i < conf->noproxies->nelts; i++) {
if ((npent[i].name != NULL && ap_strstr_c(host, npent[i].name) != NULL)
|| destaddr.s_addr == npent[i].addr.s_addr || npent[i].name[0] == '*')
return ap_proxyerror(r, HTTP_FORBIDDEN,
"Connect to remote machine blocked");
}
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: connect to %s:%d", host, port);
parms = strchr(path, ';');
if (parms != NULL)
*(parms++) = '\0';
if ((apr_socket_create(&sock, APR_INET, SOCK_STREAM, r->pool)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"proxy: error creating socket");
return HTTP_INTERNAL_SERVER_ERROR;
}
#if !defined(TPF) && !defined(BEOS)
if (conf->recv_buffer_size > 0
&& apr_setsocketopt(sock, APR_SO_RCVBUF,
conf->recv_buffer_size)) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"setsockopt(SO_RCVBUF): Failed to set ProxyReceiveBufferSize, using default");
}
#endif
if (apr_setsocketopt(sock, APR_SO_REUSEADDR, one)) {
#ifndef _OSD_POSIX /* BS2000 has this option "always on" */
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"proxy: error setting reuseaddr option: setsockopt(SO_REUSEADDR)");
apr_socket_close(sock);
return HTTP_INTERNAL_SERVER_ERROR;
#endif /*_OSD_POSIX*/
}
if (ap_proxy_doconnect(sock, host, port, r) != APR_SUCCESS) {
apr_socket_close(sock);
return ap_proxyerror(r, HTTP_BAD_GATEWAY, apr_pstrcat(r->pool,
"Could not connect to remote machine: ",
host, NULL));
}
f = ap_bcreate(p, B_RDWR);
ap_bpush_socket(f, sock);
/* shouldn't we implement telnet control options here? */
#if APR_CHARSET_EBCDIC
ap_bsetflag(f, B_ASCII2EBCDIC|B_EBCDIC2ASCII, 1);
#endif /*APR_CHARSET_EBCDIC*/
/* possible results: */
/* 120 Service ready in nnn minutes. */
/* 220 Service ready for new user. */
/* 421 Service not available, closing control connection. */
i = ftp_getrc_msg(f, resp, sizeof resp);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: returned status %d", i);
if (i == -1) {
return ap_proxyerror(r, HTTP_BAD_GATEWAY,
"Error reading from remote server");
}
#if 0
if (i == 120) {
/* RFC2068 states:
* 14.38 Retry-After
*
* The Retry-After response-header field can be used with a 503 (Service
* Unavailable) response to indicate how long the service is expected to
* be unavailable to the requesting client. The value of this field can
* be either an HTTP-date or an integer number of seconds (in decimal)
* after the time of the response.
* Retry-After = "Retry-After" ":" ( HTTP-date | delta-seconds )
*/
ap_set_header("Retry-After", apr_psprintf(p, "%u", 60*wait_mins);
return ap_proxyerror(r, HTTP_SERVICE_UNAVAILABLE, resp);
}
#endif
if (i != 220) {
return ap_proxyerror(r, HTTP_BAD_GATEWAY, resp);
}
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: connected.");
ap_bvputs(f, "USER ", user, CRLF, NULL);
ap_bflush(f); /* capture any errors */
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: USER %s", user);
/* possible results; 230, 331, 332, 421, 500, 501, 530 */
/* states: 1 - error, 2 - success; 3 - send password, 4,5 fail */
/* 230 User logged in, proceed. */
/* 331 User name okay, need password. */
/* 332 Need account for login. */
/* 421 Service not available, closing control connection. */
/* 500 Syntax error, command unrecognized. */
/* (This may include errors such as command line too long.) */
/* 501 Syntax error in parameters or arguments. */
/* 530 Not logged in. */
i = ftp_getrc(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: returned status %d", i);
if (i == -1) {
return ap_proxyerror(r, HTTP_BAD_GATEWAY,
"Error reading from remote server");
}
if (i == 530) {
return ftp_unauthorized (r, 1); /* log it: user name guessing attempt? */
}
if (i != 230 && i != 331) {
return HTTP_BAD_GATEWAY;
}
if (i == 331) { /* send password */
if (password == NULL) {
return ftp_unauthorized (r, 0);
}
ap_bvputs(f, "PASS ", password, CRLF, NULL);
ap_bflush(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: PASS %s", password);
/* possible results 202, 230, 332, 421, 500, 501, 503, 530 */
/* 230 User logged in, proceed. */
/* 332 Need account for login. */
/* 421 Service not available, closing control connection. */
/* 500 Syntax error, command unrecognized. */
/* 501 Syntax error in parameters or arguments. */
/* 503 Bad sequence of commands. */
/* 530 Not logged in. */
i = ftp_getrc(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: returned status %d", i);
if (i == -1) {
return ap_proxyerror(r, HTTP_BAD_GATEWAY,
"Error reading from remote server");
}
if (i == 332) {
return ap_proxyerror(r, HTTP_UNAUTHORIZED,
"Need account for login");
}
/* @@@ questionable -- we might as well return a 403 Forbidden here */
if (i == 530) {
return ftp_unauthorized (r, 1); /* log it: passwd guessing attempt? */
}
if (i != 230 && i != 202) {
return HTTP_BAD_GATEWAY;
}
}
/* set the directory (walk directory component by component):
* this is what we must do if we don't know the OS type of the remote
* machine
*/
for (;;) {
strp = strchr(path, '/');
if (strp == NULL)
break;
*strp = '\0';
len = decodeenc(path);
ap_bvputs(f, "CWD ", path, CRLF, NULL);
ap_bflush(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: CWD %s", path);
*strp = '/';
/* responses: 250, 421, 500, 501, 502, 530, 550 */
/* 250 Requested file action okay, completed. */
/* 421 Service not available, closing control connection. */
/* 500 Syntax error, command unrecognized. */
/* 501 Syntax error in parameters or arguments. */
/* 502 Command not implemented. */
/* 530 Not logged in. */
/* 550 Requested action not taken. */
i = ftp_getrc(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: returned status %d", i);
if (i == -1) {
return ap_proxyerror(r, HTTP_BAD_GATEWAY,
"Error reading from remote server");
}
if (i == 550) {
return HTTP_NOT_FOUND;
}
if (i != 250) {
return HTTP_BAD_GATEWAY;
}
path = strp + 1;
}
if (parms != NULL && strncmp(parms, "type=", 5) == 0) {
parms += 5;
if ((parms[0] != 'd' && parms[0] != 'a' && parms[0] != 'i') ||
parms[1] != '\0')
parms = "";
}
else
parms = "";
/* changed to make binary transfers the default */
if (parms[0] != 'a') {
/* set type to image */
/* TM - Added CRLF to the end of TYPE I, otherwise it hangs the
connection */
ap_bputs("TYPE I" CRLF, f);
ap_bflush(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: TYPE I");
/* responses: 200, 421, 500, 501, 504, 530 */
/* 200 Command okay. */
/* 421 Service not available, closing control connection. */
/* 500 Syntax error, command unrecognized. */
/* 501 Syntax error in parameters or arguments. */
/* 504 Command not implemented for that parameter. */
/* 530 Not logged in. */
i = ftp_getrc(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: returned status %d", i);
if (i == -1) {
return ap_proxyerror(r, HTTP_BAD_GATEWAY,
"Error reading from remote server");
}
if (i != 200 && i != 504) {
return HTTP_BAD_GATEWAY;
}
/* Allow not implemented */
if (i == 504)
parms[0] = '\0';
}
/* try to set up PASV data connection first */
if ((apr_socket_create(&dsock, APR_INET, SOCK_STREAM, r->pool)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"proxy: error creating PASV socket");
ap_bclose(f);
return HTTP_INTERNAL_SERVER_ERROR;
}
#if !defined (TPF) && !defined(BEOS)
if (conf->recv_buffer_size > 0 && apr_setsocketopt(dsock, APR_SO_RCVBUF,
conf->recv_buffer_size)) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"setsockopt(SO_RCVBUF): Failed to set ProxyReceiveBufferSize, using default");
}
#endif
ap_bputs("PASV" CRLF, f);
ap_bflush(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: PASV command issued");
/* possible results: 227, 421, 500, 501, 502, 530 */
/* 227 Entering Passive Mode (h1,h2,h3,h4,p1,p2). */
/* 421 Service not available, closing control connection. */
/* 500 Syntax error, command unrecognized. */
/* 501 Syntax error in parameters or arguments. */
/* 502 Command not implemented. */
/* 530 Not logged in. */
i = ap_bgets(pasv, sizeof(pasv), f);
if (i == -1) {
ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, r,
"PASV: control connection is toast");
apr_socket_close(dsock);
ap_bclose(f);
return HTTP_INTERNAL_SERVER_ERROR;
}
else {
pasv[i - 1] = '\0';
pstr = strtok(pasv, " "); /* separate result code */
if (pstr != NULL) {
presult = atoi(pstr);
if (*(pstr + strlen(pstr) + 1) == '=')
pstr += strlen(pstr) + 2;
else
{
pstr = strtok(NULL, "("); /* separate address & port params */
if (pstr != NULL)
pstr = strtok(NULL, ")");
}
}
else
presult = atoi(pasv);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: returned status %d", presult);
if (presult == 227 && pstr != NULL && (sscanf(pstr,
"%d,%d,%d,%d,%d,%d", &h3, &h2, &h1, &h0, &p1, &p0) == 6)) {
/* pardon the parens, but it makes gcc happy */
destaddr.s_addr = htonl((((((h3 << 8) + h2) << 8) + h1) << 8) + h0);
pport = (p1 << 8) + p0;
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: contacting host %d.%d.%d.%d:%d",
h3, h2, h1, h0, pport);
/* scary */
if (ap_proxy_doconnect(dsock, inet_ntoa(destaddr), pport, r) == APR_SUCCESS) {
return ap_proxyerror(r, HTTP_BAD_GATEWAY,
apr_pstrcat(r->pool,
"Could not connect to remote machine: ",
inet_ntoa(destaddr), NULL));
}
else {
pasvmode = 1;
}
}
else
apr_socket_close(dsock); /* and try the regular way */
}
if (!pasvmode) { /* set up data connection */
if ((apr_socket_create(&dsock, APR_INET, SOCK_STREAM, r->pool)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"proxy: error creating socket");
ap_bclose(f);
return HTTP_INTERNAL_SERVER_ERROR;
}
apr_socket_addr_get(&localsa, APR_LOCAL, sock);
apr_sockaddr_port_get(&npport, localsa);
apr_sockaddr_ip_get(&npaddr, localsa);
if (apr_setsocketopt(dsock, APR_SO_REUSEADDR, one) != APR_SUCCESS) {
#ifndef _OSD_POSIX /* BS2000 has this option "always on" */
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"proxy: error setting reuseaddr option");
apr_socket_close(dsock);
ap_bclose(f);
return HTTP_INTERNAL_SERVER_ERROR;
#endif /*_OSD_POSIX*/
}
if (apr_sockaddr_info_get(&localsa, npaddr, APR_INET, npport, 0, r->pool)
!= APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"proxy: error creating local socket address");
ap_bclose(f);
return HTTP_INTERNAL_SERVER_ERROR;
}
if (apr_bind(dsock, localsa) != APR_SUCCESS) {
char buff[22];
apr_snprintf(buff, sizeof(buff), "%s:%d", npaddr, npport);
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"proxy: error binding to ftp data socket %s", buff);
ap_bclose(f);
apr_socket_close(dsock);
return HTTP_INTERNAL_SERVER_ERROR;
}
apr_listen(dsock, 2); /* only need a short queue */
}
/* set request; "path" holds last path component */
len = decodeenc(path);
/* TM - if len == 0 then it must be a directory (you can't RETR nothing) */
if (len == 0) {
parms = "d";
}
else {
ap_bvputs(f, "SIZE ", path, CRLF, NULL);
ap_bflush(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: SIZE %s", path);
i = ftp_getrc_msg(f, resp, sizeof resp);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: returned status %d with response %s", i, resp);
if (i != 500) { /* Size command not recognized */
if (i == 550) { /* Not a regular file */
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: SIZE shows this is a directory");
parms = "d";
ap_bvputs(f, "CWD ", path, CRLF, NULL);
ap_bflush(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: CWD %s", path);
i = ftp_getrc(f);
/* possible results: 250, 421, 500, 501, 502, 530, 550 */
/* 250 Requested file action okay, completed. */
/* 421 Service not available, closing control connection. */
/* 500 Syntax error, command unrecognized. */
/* 501 Syntax error in parameters or arguments. */
/* 502 Command not implemented. */
/* 530 Not logged in. */
/* 550 Requested action not taken. */
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: returned status %d", i);
if (i == -1) {
return ap_proxyerror(r, HTTP_BAD_GATEWAY,
"Error reading from remote server");
}
if (i == 550) {
return HTTP_NOT_FOUND;
}
if (i != 250) {
return HTTP_BAD_GATEWAY;
}
path = "";
len = 0;
}
else if (i == 213) { /* Size command ok */
for (j = 0; j < sizeof resp && apr_isdigit(resp[j]); j++)
;
resp[j] = '\0';
if (resp[0] != '\0')
size = apr_pstrdup(p, resp);
}
}
}
#ifdef AUTODETECT_PWD
ap_bvputs(f, "PWD", CRLF, NULL);
ap_bflush(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: PWD");
/* responses: 257, 500, 501, 502, 421, 550 */
/* 257 "<directory-name>" <commentary> */
/* 421 Service not available, closing control connection. */
/* 500 Syntax error, command unrecognized. */
/* 501 Syntax error in parameters or arguments. */
/* 502 Command not implemented. */
/* 550 Requested action not taken. */
i = ftp_getrc_msg(f, resp, sizeof resp);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: PWD returned status %d", i);
if (i == -1 || i == 421) {
return ap_proxyerror(r, HTTP_BAD_GATEWAY,
"Error reading from remote server");
}
if (i == 550) {
return HTTP_NOT_FOUND;
}
if (i == 257) {
const char *dirp = resp;
cwd = ap_getword_conf(r->pool, &dirp);
}
#endif /*AUTODETECT_PWD*/
if (parms[0] == 'd') {
if (len != 0)
ap_bvputs(f, "LIST ", path, CRLF, NULL);
else
ap_bputs("LIST -lag" CRLF, f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: LIST %s", (len == 0 ? "" : path));
}
else {
ap_bvputs(f, "RETR ", path, CRLF, NULL);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: RETR %s", path);
}
ap_bflush(f);
/* RETR: 110, 125, 150, 226, 250, 421, 425, 426, 450, 451, 500, 501, 530, 550
NLST: 125, 150, 226, 250, 421, 425, 426, 450, 451, 500, 501, 502, 530 */
/* 110 Restart marker reply. */
/* 125 Data connection already open; transfer starting. */
/* 150 File status okay; about to open data connection. */
/* 226 Closing data connection. */
/* 250 Requested file action okay, completed. */
/* 421 Service not available, closing control connection. */
/* 425 Can't open data connection. */
/* 426 Connection closed; transfer aborted. */
/* 450 Requested file action not taken. */
/* 451 Requested action aborted. Local error in processing. */
/* 500 Syntax error, command unrecognized. */
/* 501 Syntax error in parameters or arguments. */
/* 530 Not logged in. */
/* 550 Requested action not taken. */
rc = ftp_getrc(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: returned status %d", rc);
if (rc == -1) {
return ap_proxyerror(r, HTTP_BAD_GATEWAY,
"Error reading from remote server");
}
if (rc == 550) {
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: RETR failed, trying LIST instead");
parms = "d";
ap_bvputs(f, "CWD ", path, CRLF, NULL);
ap_bflush(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: CWD %s", path);
/* possible results: 250, 421, 500, 501, 502, 530, 550 */
/* 250 Requested file action okay, completed. */
/* 421 Service not available, closing control connection. */
/* 500 Syntax error, command unrecognized. */
/* 501 Syntax error in parameters or arguments. */
/* 502 Command not implemented. */
/* 530 Not logged in. */
/* 550 Requested action not taken. */
rc = ftp_getrc(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: returned status %d", rc);
if (rc == -1) {
return ap_proxyerror(r, HTTP_BAD_GATEWAY,
"Error reading from remote server");
}
if (rc == 550) {
return HTTP_NOT_FOUND;
}
if (rc != 250) {
return HTTP_BAD_GATEWAY;
}
#ifdef AUTODETECT_PWD
ap_bvputs(f, "PWD", CRLF, NULL);
ap_bflush(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: PWD");
/* responses: 257, 500, 501, 502, 421, 550 */
/* 257 "<directory-name>" <commentary> */
/* 421 Service not available, closing control connection. */
/* 500 Syntax error, command unrecognized. */
/* 501 Syntax error in parameters or arguments. */
/* 502 Command not implemented. */
/* 550 Requested action not taken. */
i = ftp_getrc_msg(f, resp, sizeof resp);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: PWD returned status %d", i);
if (i == -1 || i == 421) {
return ap_proxyerror(r, HTTP_BAD_GATEWAY,
"Error reading from remote server");
}
if (i == 550) {
return HTTP_NOT_FOUND;
}
if (i == 257) {
const char *dirp = resp;
cwd = ap_getword_conf(r->pool, &dirp);
}
#endif /*AUTODETECT_PWD*/
ap_bputs("LIST -lag" CRLF, f);
ap_bflush(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: LIST -lag");
rc = ftp_getrc(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: returned status %d", rc);
if (rc == -1)
return ap_proxyerror(r, HTTP_BAD_GATEWAY,
"Error reading from remote server");
}
if (rc != 125 && rc != 150 && rc != 226 && rc != 250)
return HTTP_BAD_GATEWAY;
r->status = HTTP_OK;
r->status_line = "200 OK";
resp_hdrs = ap_make_table(p, 2);
apr_rfc822_date(dates, r->request_time);
apr_table_setn(resp_hdrs, "Date", dates);
apr_table_setn(resp_hdrs, "Server", ap_get_server_version());
if (parms[0] == 'd')
apr_table_setn(resp_hdrs, "Content-Type", "text/html");
else {
if (r->content_type != NULL) {
apr_table_setn(resp_hdrs, "Content-Type", r->content_type);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: Content-Type set to %s", r->content_type);
}
else {
apr_table_setn(resp_hdrs, "Content-Type", ap_default_type(r));
}
if (parms[0] != 'a' && size != NULL) {
/* We "trust" the ftp server to really serve (size) bytes... */
apr_table_setn(resp_hdrs, "Content-Length", size);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: Content-Length set to %s", size);
}
}
if (r->content_encoding != NULL && r->content_encoding[0] != '\0') {
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: Content-Encoding set to %s", r->content_encoding);
apr_table_setn(resp_hdrs, "Content-Encoding", r->content_encoding);
}
ap_cache_el_header_merge(c, resp_hdrs);
/* check if NoCache directive on this host */
for (i = 0; i < conf->nocaches->nelts; i++) {
if ((ncent[i].name != NULL && ap_strstr_c(host, ncent[i].name) != NULL)
|| destaddr.s_addr == ncent[i].addr.s_addr || ncent[i].name[0] == '*')
nocache = 1;
}
#if 0
i = ap_proxy_cache_update(c, resp_hdrs, 0, nocache);
if (i != DECLINED) {
ap_pclosesocket(p, dsock);
ap_bclose(f);
return i;
}
#endif
if(nocache || !ap_proxy_cache_should_cache(r, resp_hdrs, 0))
ap_proxy_cache_error(&c);
else
ap_cache_el_data(c, &cachefp);
if (!pasvmode) { /* wait for connection */
for(;;)
{
switch(apr_accept(&inc, dsock, r->pool))
{
case APR_EINTR:
continue;
case APR_SUCCESS:
break;
default:
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"proxy: failed to accept data connection");
apr_socket_close(dsock);
ap_bclose(f);
if (c != NULL) ap_proxy_cache_error(&c);
return HTTP_BAD_GATEWAY;
}
}
data = ap_bcreate(p, B_RDWR);
ap_bpush_socket(f, csd);
}
else {
data = ap_bcreate(p, B_RDWR);
ap_bpush_socket(data, dsock);
}
/* send response */
/* write status line */
if (!r->assbackwards)
ap_rvputs(r, "HTTP/1.0 ", r->status_line, CRLF, NULL);
if (cachefp && apr_file_puts(apr_pstrcat(r->pool, "HTTP/1.0 ",
r->status_line, CRLF, NULL), cachefp) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"proxy: error writing CRLF to cache");
ap_proxy_cache_error(&c);
cachefp = NULL;
}
/* send headers */
ap_cache_el_header_walk(c, ap_proxy_send_hdr_line, r, NULL);
if (!r->assbackwards)
ap_rputs(CRLF, r);
if (cachefp && apr_file_puts(CRLF, cachefp) == -1) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"proxy: error writing CRLF to cache");
ap_proxy_cache_error(&c);
cachefp = NULL;
}
/* This is done by a filter now, so this can probably be removed cleanly.
ap_bsetopt(r->connection->client, BO_BYTECT, &zero);
*/
r->sent_bodyct = 1;
/* send body */
if (!r->header_only) {
if (parms[0] != 'd') {
ap_proxy_send_fb(NULL, data, r, c);
} else
send_dir(data, r, c, cwd);
if (rc == 125 || rc == 150)
rc = ftp_getrc(f);
/* XXX: we checked for 125||150||226||250 above. This is redundant. */
if (rc != 226 && rc != 250)
/* XXX: we no longer log an "error writing to c->tempfile" - should we? */
ap_proxy_cache_error(&c);
}
else {
/* abort the transfer */
ap_bputs("ABOR" CRLF, f);
ap_bflush(f);
if (!pasvmode)
ap_bclose(data);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: ABOR");
/* responses: 225, 226, 421, 500, 501, 502 */
/* 225 Data connection open; no transfer in progress. */
/* 226 Closing data connection. */
/* 421 Service not available, closing control connection. */
/* 500 Syntax error, command unrecognized. */
/* 501 Syntax error in parameters or arguments. */
/* 502 Command not implemented. */
i = ftp_getrc(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: returned status %d", i);
}
/* finish */
ap_bputs("QUIT" CRLF, f);
ap_bflush(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: QUIT");
/* responses: 221, 500 */
/* 221 Service closing control connection. */
/* 500 Syntax error, command unrecognized. */
i = ftp_getrc(f);
ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, NULL,
"FTP: QUIT: status %d", i);
if (pasvmode)
ap_bclose(data);
ap_bclose(f);
ap_rflush(r); /* flush before garbage collection */
if(c) ap_proxy_cache_update(c);
return OK;
}