X-Git-Url: http://www.privoxy.org/gitweb/?p=privoxy.git;a=blobdiff_plain;f=jcc.c;h=2d96ac9fdcad3a4f2341ae3d918c7de42b2ee90b;hp=0708b7aa0c0e97db45391f818c9e8adeb857d77b;hb=f4464cf737ef3de89c27a86c20595bebc802b29a;hpb=cf47a535d5644f1a879b158622bc6f43d6649530 diff --git a/jcc.c b/jcc.c index 0708b7aa..2d96ac9f 100644 --- a/jcc.c +++ b/jcc.c @@ -1,4 +1,4 @@ -const char jcc_rcs[] = "$Id: jcc.c,v 1.146 2007/08/20 17:09:32 fabiankeil Exp $"; +const char jcc_rcs[] = "$Id: jcc.c,v 1.186 2008/09/04 08:13:58 fabiankeil Exp $"; /********************************************************************* * * File : $Source: /cvsroot/ijbswa/current/jcc.c,v $ @@ -6,7 +6,7 @@ const char jcc_rcs[] = "$Id: jcc.c,v 1.146 2007/08/20 17:09:32 fabiankeil Exp $" * Purpose : Main file. Contains main() method, main loop, and * the main connection-handling function. * - * Copyright : Written by and Copyright (C) 2001-2007 the SourceForge + * Copyright : Written by and Copyright (C) 2001-2008 the SourceForge * Privoxy team. http://www.privoxy.org/ * * Based on the Internet Junkbuster originally written @@ -33,6 +33,163 @@ const char jcc_rcs[] = "$Id: jcc.c,v 1.146 2007/08/20 17:09:32 fabiankeil Exp $" * * Revisions : * $Log: jcc.c,v $ + * Revision 1.186 2008/09/04 08:13:58 fabiankeil + * Prepare for critical sections on Windows by adding a + * layer of indirection before the pthread mutex functions. + * + * Revision 1.185 2008/08/30 12:03:07 fabiankeil + * Remove FEATURE_COOKIE_JAR. + * + * Revision 1.184 2008/08/22 15:34:45 fabiankeil + * - Silence LLVM/Clang complaint. + * - Make received_hup_signal static. + * - Hide definitions for basedir, pidfile and received_hup_signal + * from __EMX__ as they only seem to be used in case of #ifdef unix. + * + * Revision 1.183 2008/08/21 07:09:35 fabiankeil + * Accept Shoutcast responses again. Problem reported + * and fix suggested by Stefan in #2062860. + * + * Revision 1.182 2008/06/27 11:13:56 fabiankeil + * Fix possible NULL-pointer dereference reported + * by din_a4 in #2003937. Pointy hat to me. + * + * Revision 1.181 2008/05/21 15:47:15 fabiankeil + * Streamline sed()'s prototype and declare + * the header parse and add structures static. + * + * Revision 1.180 2008/05/21 15:26:32 fabiankeil + * - Mark csp as immutable for send_crunch_response(). + * - Fix comment spelling. + * + * Revision 1.179 2008/05/20 20:13:32 fabiankeil + * Factor update_server_headers() out of sed(), ditch the + * first_run hack and make server_patterns_light static. + * + * Revision 1.178 2008/05/10 13:23:38 fabiankeil + * Don't provide get_header() with the whole client state + * structure when it only needs access to csp->iob. + * + * Revision 1.177 2008/05/10 11:51:12 fabiankeil + * Make the "read the rest of the headers" loop a bit more readable. + * + * Revision 1.176 2008/05/10 11:37:57 fabiankeil + * - Instead of logging when the IIS5 hack is enabled, log when it fails. + * - Remove useless comment. + * + * Revision 1.175 2008/05/09 18:53:59 fabiankeil + * Fix comment grammar. + * + * Revision 1.174 2008/05/07 18:05:53 fabiankeil + * Remove the pointless buffer in client_protocol_is_unsupported(). + * + * Revision 1.173 2008/05/06 15:09:00 fabiankeil + * Least-effort fix for bug #1821930 (reported by Lee): + * If the response doesn't look like HTTP, + * tell the client and log the problem. + * + * Revision 1.172 2008/04/16 16:38:21 fabiankeil + * Don't pass the whole csp structure to flush_socket() + * when it only needs a file descriptor and a buffer. + * + * Revision 1.171 2008/03/27 18:27:25 fabiankeil + * Remove kill-popups action. + * + * Revision 1.170 2008/03/06 16:33:46 fabiankeil + * If limit-connect isn't used, don't limit CONNECT requests to port 443. + * + * Revision 1.169 2008/03/04 18:30:39 fabiankeil + * Remove the treat-forbidden-connects-like-blocks action. We now + * use the "blocked" page for forbidden CONNECT requests by default. + * + * Revision 1.168 2008/03/02 12:25:25 fabiankeil + * Also use shiny new connect_port_is_forbidden() in jcc.c. + * + * Revision 1.167 2008/02/23 16:57:12 fabiankeil + * Rename url_actions() to get_url_actions() and let it + * use the standard parameter ordering. + * + * Revision 1.166 2008/02/23 16:33:43 fabiankeil + * Let forward_url() use the standard parameter ordering + * and mark its second parameter immutable. + * + * Revision 1.165 2008/02/02 19:36:56 fabiankeil + * Remove the "Listening ... for local connections only" log message. + * Whether or not remote connections are able to reach Privoxy is up + * to the operating system. + * + * Revision 1.164 2007/12/16 18:32:46 fabiankeil + * Prevent the log messages for CONNECT requests to unacceptable + * ports from printing the limit-connect argument as [null] if + * limit-connect hasn't been explicitly enabled. + * + * Revision 1.163 2007/12/13 01:47:11 david__schmidt + * Make sure all console-mode apps get a usage() instance + * + * Revision 1.162 2007/12/06 17:54:57 fabiankeil + * Reword NO_SERVER_DATA_RESPONSE to make it harder + * to misunderstand what the message is all about. + * + * Revision 1.161 2007/12/04 19:44:22 fabiankeil + * Unbreak trustfile which previously didn't work without + * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee. + * + * Revision 1.160 2007/11/29 18:00:29 fabiankeil + * Plug memory leak. Spotted by Valgrind, triggered by + * Privoxy-Regression-Test feeding proxyfuzz.py. + * + * Revision 1.159 2007/11/24 14:34:09 fabiankeil + * In the HTTP snipplets, refer to the client as client. + * + * Revision 1.158 2007/11/11 16:44:17 fabiankeil + * Emit a log message when activating the MS IIS5 hack. + * + * Revision 1.157 2007/11/03 17:34:49 fabiankeil + * Log the "weak randomization factor" warning only + * once for mingw32 and provide some more details. + * + * Revision 1.156 2007/11/01 18:20:58 fabiankeil + * Initialize log module after initializing mutexes, future + * deadlocks in that code should now work cross-platform. + * + * Revision 1.155 2007/10/23 20:12:45 fabiankeil + * Fix first CSUCCEED line to end in \r\n as required by RFC1945. + * Reported by Bert van Leeuwen in BR#1818808. + * + * Revision 1.154 2007/10/19 17:00:08 fabiankeil + * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO. + * + * Revision 1.153 2007/10/14 14:12:41 fabiankeil + * When in daemon mode, close stderr after the configuration file has been + * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436. + * + * Revision 1.152 2007/10/04 18:03:34 fabiankeil + * - Fix a crash when parsing invalid requests whose first header + * is rejected by get_header(). Regression (re?)introduced + * in r1.143 by yours truly. + * - Move ACTION_VANILLA_WAFER handling into parsers.c's + * client_cookie_adder() to make sure send-vanilla-wafer can be + * controlled through tags (and thus regression-tested). + * + * Revision 1.151 2007/09/29 10:21:16 fabiankeil + * - Move get_filter_function() from jcc.c to filters.c + * so the filter functions can be static. + * - Don't bother filtering body-less responses. + * + * Revision 1.150 2007/09/28 16:39:29 fabiankeil + * Execute content filters through execute_content_filter(). + * + * Revision 1.149 2007/09/04 15:08:48 fabiankeil + * Initialize req to NULL to make sure it's defined if the + * first read_socket() call fails. Reported by icmp30. + * + * Revision 1.148 2007/08/26 16:47:13 fabiankeil + * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666], + * extensive comments moved to user manual. + * + * Revision 1.147 2007/08/25 14:42:40 fabiankeil + * Don't crash if a broken header filter wiped out the request line. + * * Revision 1.146 2007/08/20 17:09:32 fabiankeil * Fix byte_count calculation in case of flushes * and don't parse the server headers a second time. @@ -952,7 +1109,6 @@ http://www.fabiankeil.de/sourcecode/privoxy/ #include "filters.h" #include "loaders.h" #include "parsers.h" -#include "killpopup.h" #include "miscutil.h" #include "errlog.h" #include "jbsockets.h" @@ -985,7 +1141,7 @@ static int client_protocol_is_unsupported(const struct client_state *csp, char * static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers); static jb_err get_server_headers(struct client_state *csp); static const char *crunch_reason(const struct http_response *rsp); -static void send_crunch_response(struct client_state *csp, struct http_response *rsp); +static void send_crunch_response(const struct client_state *csp, struct http_response *rsp); /* * static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len); */ @@ -993,7 +1149,7 @@ static void build_request_line(struct client_state *csp, const struct forward_sp static jb_err change_request_destination(struct client_state *csp); static void chat(struct client_state *csp); static void serve(struct client_state *csp); -#if defined(unix) +#if !defined(_WIN32) || defined(_WIN_CONSOLE) static void usage(const char *myname); #endif static void initialize_mutexes(void); @@ -1018,77 +1174,64 @@ static int32 server_thread(void *data); #define sleep(N) DosSleep(((N) * 100)) #endif -#ifdef FEATURE_PTHREAD -pthread_mutex_t log_mutex; -pthread_mutex_t log_init_mutex; +#ifdef MUTEX_LOCKS_AVAILABLE +/* + * XXX: Does the locking stuff really belong in this file? + */ +privoxy_mutex_t log_mutex; +privoxy_mutex_t log_init_mutex; #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) -pthread_mutex_t resolver_mutex; +privoxy_mutex_t resolver_mutex; #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */ #ifndef HAVE_GMTIME_R -pthread_mutex_t gmtime_mutex; +privoxy_mutex_t gmtime_mutex; #endif /* ndef HAVE_GMTIME_R */ #ifndef HAVE_LOCALTIME_R -pthread_mutex_t localtime_mutex; +privoxy_mutex_t localtime_mutex; #endif /* ndef HAVE_GMTIME_R */ #ifndef HAVE_RANDOM -pthread_mutex_t rand_mutex; +privoxy_mutex_t rand_mutex; #endif /* ndef HAVE_RANDOM */ -#endif /* FEATURE_PTHREAD */ +#endif /* def MUTEX_LOCKS_AVAILABLE */ -#if defined(unix) || defined(__EMX__) +#if defined(unix) const char *basedir = NULL; const char *pidfile = NULL; -int received_hup_signal = 0; +static int received_hup_signal = 0; #endif /* defined unix */ -/* The vanilla wafer. */ -static const char VANILLA_WAFER[] = - "NOTICE=TO_WHOM_IT_MAY_CONCERN_" - "Do_not_send_me_any_copyrighted_information_other_than_the_" - "document_that_I_am_requesting_or_any_of_its_necessary_components._" - "In_particular_do_not_send_me_any_cookies_that_" - "are_subject_to_a_claim_of_copyright_by_anybody._" - "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_" - "(copyright_or_otherwise)_applying_to_any_cookie._"; - /* HTTP snipplets. */ static const char CSUCCEED[] = - "HTTP/1.0 200 Connection established\n" + "HTTP/1.0 200 Connection established\r\n" "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n"; static const char CHEADER[] = - "HTTP/1.0 400 Invalid header received from browser\r\n" + "HTTP/1.0 400 Invalid header received from client\r\n" "Proxy-Agent: Privoxy " VERSION "\r\n" "Content-Type: text/plain\r\n" "Connection: close\r\n\r\n" - "Invalid header received from browser.\r\n"; - -static const char CFORBIDDEN[] = - "HTTP/1.0 403 Connection not allowable\r\n" - "Proxy-Agent: Privoxy " VERSION "\r\n" - "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n" - "Connection: close\r\n\r\n"; + "Invalid header received from client.\r\n"; static const char FTP_RESPONSE[] = - "HTTP/1.0 400 Invalid request received from browser\r\n" + "HTTP/1.0 400 Invalid request received from client\r\n" "Content-Type: text/plain\r\n" "Connection: close\r\n\r\n" "Invalid request. Privoxy doesn't support FTP.\r\n"; static const char GOPHER_RESPONSE[] = - "HTTP/1.0 400 Invalid request received from browser\r\n" + "HTTP/1.0 400 Invalid request received from client\r\n" "Content-Type: text/plain\r\n" "Connection: close\r\n\r\n" "Invalid request. Privoxy doesn't support gopher.\r\n"; /* XXX: should be a template */ static const char MISSING_DESTINATION_RESPONSE[] = - "HTTP/1.0 400 Bad request received from browser\r\n" + "HTTP/1.0 400 Bad request received from client\r\n" "Proxy-Agent: Privoxy " VERSION "\r\n" "Content-Type: text/plain\r\n" "Connection: close\r\n\r\n" @@ -1101,15 +1244,25 @@ static const char NO_SERVER_DATA_RESPONSE[] = "Content-Type: text/plain\r\n" "Connection: close\r\n\r\n" "Empty server or forwarder response.\r\n" - "The connection was closed without sending any data.\r\n"; + "The connection has been closed but Privoxy didn't receive any data.\r\n"; +/* XXX: should be a template */ +static const char INVALID_SERVER_HEADERS_RESPONSE[] = + "HTTP/1.0 502 Server or forwarder response invalid\r\n" + "Proxy-Agent: Privoxy " VERSION "\r\n" + "Content-Type: text/plain\r\n" + "Connection: close\r\n\r\n" + "Bad response. The server or forwarder response doesn't look like HTTP.\r\n"; + +#if 0 /* XXX: should be a template */ static const char NULL_BYTE_RESPONSE[] = - "HTTP/1.0 400 Bad request received from browser\r\n" + "HTTP/1.0 400 Bad request received from client\r\n" "Proxy-Agent: Privoxy " VERSION "\r\n" "Content-Type: text/plain\r\n" "Connection: close\r\n\r\n" "Bad request. Null byte(s) before end of request.\r\n"; +#endif /* XXX: should be a template */ static const char MESSED_UP_REQUEST_RESPONSE[] = @@ -1122,8 +1275,6 @@ static const char MESSED_UP_REQUEST_RESPONSE[] = /* A function to crunch a response */ typedef struct http_response *(*crunch_func_ptr)(struct client_state *); -typedef char *(*filter_function_ptr)(); - /* Crunch function flags */ #define CF_NO_FLAGS 0 /* Cruncher applies to forced requests as well */ @@ -1139,7 +1290,6 @@ struct cruncher }; static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]); -static filter_function_ptr get_filter_function(struct client_state *csp); /* Complete list of cruncher functions */ static const struct cruncher crunchers_all[] = { @@ -1161,6 +1311,13 @@ static const struct cruncher crunchers_light[] = { }; +/* + * XXX: Don't we really mean + * + * #if defined(unix) + * + * here? + */ #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA) /********************************************************************* * @@ -1194,7 +1351,9 @@ static void sig_handler(int the_signal) break; case SIGHUP: +#if defined(unix) received_hup_signal = 1; +#endif break; default: @@ -1228,8 +1387,6 @@ static void sig_handler(int the_signal) *********************************************************************/ static int client_protocol_is_unsupported(const struct client_state *csp, char *req) { - char buf[BUFFER_SIZE]; - /* * If it's a FTP or gopher request, we don't support it. * @@ -1245,21 +1402,26 @@ static int client_protocol_is_unsupported(const struct client_state *csp, char * */ if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13)) { + const char *response = NULL; + const char *protocol = NULL; + if (!strncmpic(req, "GET ftp://", 10)) { - strlcpy(buf, FTP_RESPONSE, sizeof(buf)); - log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s", - csp->ip_addr_str, req); + response = FTP_RESPONSE; + protocol = "FTP"; } else { - strlcpy(buf, GOPHER_RESPONSE, sizeof(buf)); - log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s", - csp->ip_addr_str, req); + response = GOPHER_RESPONSE; + protocol = "GOPHER"; } - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req); + log_error(LOG_LEVEL_ERROR, + "%s tried to use Privoxy as %s proxy: %s", + csp->ip_addr_str, protocol, req); + log_error(LOG_LEVEL_CLF, + "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req); freez(req); - write_socket(csp->cfd, buf, strlen(buf)); + write_socket(csp->cfd, response, strlen(response)); return TRUE; } @@ -1367,7 +1529,7 @@ static jb_err get_server_headers(struct client_state *csp) int continue_hack_in_da_house = 0; char * header; - while (((header = get_header(csp)) != NULL) || continue_hack_in_da_house) + while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house) { if (header == NULL) { @@ -1384,7 +1546,7 @@ static jb_err get_server_headers(struct client_state *csp) { /* * It's a bodyless continue response, don't - * stop header parsing after reaching it's end. + * stop header parsing after reaching its end. * * As a result Privoxy will concatenate the * next response's head and parse and deliver @@ -1418,7 +1580,6 @@ static jb_err get_server_headers(struct client_state *csp) return JB_ERR_PARSE; } - /* Enlist header */ if (JB_ERR_MEMORY == enlist(csp->headers, header)) { /* @@ -1511,7 +1672,7 @@ static const char *crunch_reason(const struct http_response *rsp) * Returns : Nothing. * *********************************************************************/ -static void send_crunch_response(struct client_state *csp, struct http_response *rsp) +static void send_crunch_response(const struct client_state *csp, struct http_response *rsp) { const struct http_request *http = csp->http; char status_code[4]; @@ -1794,97 +1955,21 @@ static jb_err change_request_destination(struct client_state *csp) log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.", jb_err_to_string(err)); } - http->ocmd = strdup(http->cmd); /* XXX: ocmd is a misleading name */ - if (http->ocmd == NULL) - { - log_error(LOG_LEVEL_FATAL, "Out of memory copying rewritten HTTP request line"); - } - - return err; -} - - -/********************************************************************* - * - * Function : get_filter_function - * - * Description : Decides which content filter function has - * to be applied (if any). - * - * XXX: Doesn't handle filter_popups() - * because of the different prototype. Probably - * we should ditch filter_popups() anyway, it's - * even less reliable than popup blocking based - * on pcrs filters. - * - * Parameters : - * 1 : csp = Current client state (buffers, headers, etc...) - * - * Returns : The content filter function to run, or - * NULL if no content filter is active - * - *********************************************************************/ -static filter_function_ptr get_filter_function(struct client_state *csp) -{ - filter_function_ptr filter_function = NULL; - - /* - * Are we enabling text mode by force? - */ - if (csp->action->flags & ACTION_FORCE_TEXT_MODE) + else { - /* - * Do we really have to? - */ - if (csp->content_type & CT_TEXT) + /* XXX: ocmd is a misleading name */ + http->ocmd = strdup(http->cmd); + if (http->ocmd == NULL) { - log_error(LOG_LEVEL_HEADER, "Text mode is already enabled."); - } - else - { - csp->content_type |= CT_TEXT; - log_error(LOG_LEVEL_HEADER, "Text mode enabled by force. Take cover!"); + log_error(LOG_LEVEL_FATAL, + "Out of memory copying rewritten HTTP request line"); } } - if (!(csp->content_type & CT_DECLARED)) - { - /* - * The server didn't bother to declare a MIME-Type. - * Assume it's text that can be filtered. - * - * This also regulary happens with 304 responses, - * therefore logging anything here would cause - * too much noise. - */ - csp->content_type |= CT_TEXT; - } - - - /* - * Choose the applying filter function based on - * the content type and action settings. - */ - if ((csp->content_type & CT_TEXT) && - (csp->rlist != NULL) && - (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]))) - { - filter_function = pcrs_filter_response; - } - else if ((csp->content_type & CT_GIF) && - (csp->action->flags & ACTION_DEANIMATE)) - { - filter_function = gif_deanimate_response; - } - else if ((csp->content_type & CT_JPEG) && - (csp->action->flags & ACTION_JPEG_INSPECT)) - { - filter_function = jpeg_inspect_response; - } - - return filter_function; + return err; } + /********************************************************************* * * Function : chat @@ -1909,7 +1994,7 @@ static void chat(struct client_state *csp) char buf[BUFFER_SIZE]; char *hdr; char *p; - char *req; + char *req = NULL; fd_set rfds; int n; jb_socket maxfd; @@ -1922,9 +2007,6 @@ static void chat(struct client_state *csp) struct http_request *http; int len; /* for buffer sizes (and negative error codes) */ jb_err err; -#ifdef FEATURE_KILL_POPUPS - int block_popups_now = 0; /* bool, 1==currently blocking popups */ -#endif /* def FEATURE_KILL_POPUPS */ /* Function that does the content filtering for the current request */ filter_function_ptr content_filter = NULL; @@ -1960,11 +2042,11 @@ static void chat(struct client_state *csp) return; } - req = get_header(csp); + req = get_header(csp->iob); } while ((NULL != req) && ('\0' == *req)); - if (NULL != req) + if ((NULL != req) && ('\0' != *req)) { /* Request received. Validate and parse it. */ @@ -2048,31 +2130,47 @@ static void chat(struct client_state *csp) init_list(headers); for (;;) { - if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) ) + p = get_header(csp->iob); + + if (p == NULL) + { + /* There are no additional headers to read. */ + break; + } + + if (*p == '\0') { + /* + * We didn't receive a complete header + * line yet, get the rest of it. + */ len = read_socket(csp->cfd, buf, sizeof(buf) - 1); if (len <= 0) { log_error(LOG_LEVEL_ERROR, "read from client failed: %E"); + destroy_list(headers); return; } - /* - * If there is no memory left for buffering the - * request, there is nothing we can do but hang up - */ if (add_to_iob(csp, buf, len)) { + /* + * If there is no memory left for buffering the + * request, there is nothing we can do but hang up + */ + destroy_list(headers); return; } - continue; } - - if (p == NULL) break; - - enlist(headers, p); - freez(p); - + else + { + /* + * We were able to read a complete + * header and can finaly enlist it. + */ + enlist(headers, p); + freez(p); + } } if (http->host == NULL) @@ -2092,7 +2190,7 @@ static void chat(struct client_state *csp) * An error response has already been send * and we're done here. */ - return; + return; } } @@ -2108,7 +2206,7 @@ static void chat(struct client_state *csp) else #endif /* ndef FEATURE_TOGGLE */ { - url_actions(http, csp); + get_url_actions(csp, http); } /* @@ -2127,17 +2225,7 @@ static void chat(struct client_state *csp) list_append_list_unique(csp->headers, headers); destroy_list(headers); - /* - * If the user has not supplied any wafers, and the user has not - * told us to suppress the vanilla wafer, then send the vanilla wafer. - */ - if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER]) - && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0)) - { - enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER); - } - - err = sed(client_patterns, add_client_headers, csp); + err = sed(csp, FILTER_CLIENT_HEADERS); if (JB_ERR_OK != err) { assert(err == JB_ERR_PARSE); @@ -2163,13 +2251,15 @@ static void chat(struct client_state *csp) } /* decide how to route the HTTP request */ - if (NULL == (fwd = forward_url(http, csp))) + fwd = forward_url(csp, http); + if (NULL == fwd) { log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!"); /* Never get here - LOG_LEVEL_FATAL causes program exit */ } - /* build the http request to send to the server + /* + * build the http request to send to the server * we have to do one of the following: * * create = use the original HTTP request to create a new @@ -2205,50 +2295,16 @@ static void chat(struct client_state *csp) * */ - /* - * Check if a CONNECT request is allowable: - * In the absence of a +limit-connect action, allow only port 443. - * If there is an action, allow whatever matches the specificaton. - */ - if(http->ssl) + if (http->ssl && connect_port_is_forbidden(csp)) { - if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443) - || (csp->action->flags & ACTION_LIMIT_CONNECT - && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) ) - { - if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS) - { - /* - * The response may confuse some clients, - * but makes unblocking easier. - * - * XXX: It seems to work with all major browsers, - * so we should consider returning a body by default someday ... - */ - log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. " - "limit-connect{%s} doesn't allow CONNECT requests to port %d.", - csp->ip_addr_str, csp->action->string[ACTION_STRING_LIMIT_CONNECT], - csp->http->port); - csp->action->flags |= ACTION_BLOCK; - http->ssl = 0; - } - else - { - write_socket(csp->cfd, CFORBIDDEN, strlen(CFORBIDDEN)); - log_error(LOG_LEVEL_INFO, "Request from %s denied. " - "limit-connect{%s} doesn't allow CONNECT requests to port %d.", - csp->ip_addr_str, csp->action->string[ACTION_STRING_LIMIT_CONNECT], - csp->http->port); - assert(NULL != csp->http->ocmd); - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 403 0", csp->ip_addr_str, csp->http->ocmd); - - list_remove_all(csp->headers); - /* - * XXX: For consistency we might want to log a crunch message here. - */ - return; - } - } + const char *acceptable_connect_ports = + csp->action->string[ACTION_STRING_LIMIT_CONNECT]; + assert(NULL != acceptable_connect_ports); + log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. " + "limit-connect{%s} doesn't allow CONNECT requests to port %d.", + csp->ip_addr_str, acceptable_connect_ports, csp->http->port); + csp->action->flags |= ACTION_BLOCK; + http->ssl = 0; } if (http->ssl == 0) @@ -2346,7 +2402,7 @@ static void chat(struct client_state *csp) */ if (write_socket(csp->sfd, hdr, strlen(hdr)) - || (flush_socket(csp->sfd, csp) < 0)) + || (flush_socket(csp->sfd, csp->iob) < 0)) { log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E", http->hostport); @@ -2489,14 +2545,6 @@ static void chat(struct client_state *csp) */ buf[len] = '\0'; -#ifdef FEATURE_KILL_POPUPS - /* Filter the popups on this read. */ - if (block_popups_now) - { - filter_popups(buf, csp); - } -#endif /* def FEATURE_KILL_POPUPS */ - /* Normally, this would indicate that we've read * as much as the server has sent us and we can * close the client connection. However, Microsoft @@ -2527,19 +2575,21 @@ static void chat(struct client_state *csp) */ if (content_filter) { + p = execute_content_filter(csp, content_filter); /* * If the content filter fails, use the original * buffer and length. * (see p != NULL ? p : csp->iob->cur below) */ - if (NULL == (p = (*content_filter)(csp))) + if (NULL == p) { csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur); } - if (JB_ERR_OK != sed(server_patterns_light, NULL, csp)) + if (JB_ERR_OK != update_server_headers(csp)) { - log_error(LOG_LEVEL_FATAL, "Failed to parse server headers."); + log_error(LOG_LEVEL_FATAL, + "Failed to update server headers. after filtering."); } hdr = list_to_text(csp->headers); @@ -2549,12 +2599,6 @@ static void chat(struct client_state *csp) log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header"); } - /* - * Shouldn't happen because this was the second sed run - * and tags are only created for the first one. - */ - assert(!crunch_response_triggered(csp, crunchers_all)); - if (write_socket(csp->cfd, hdr, strlen(hdr)) || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length)) { @@ -2606,7 +2650,7 @@ static void chat(struct client_state *csp) size_t hdrlen; int flushed; - log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering."); + log_error(LOG_LEVEL_INFO, "Flushing header and buffers. Stepping back from filtering."); hdr = list_to_text(csp->headers); if (hdr == NULL) @@ -2624,7 +2668,7 @@ static void chat(struct client_state *csp) hdrlen = strlen(hdr); if (write_socket(csp->cfd, hdr, hdrlen) - || ((flushed = flush_socket(csp->cfd, csp)) < 0) + || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0) || (write_socket(csp->cfd, buf, (size_t)len))) { log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E"); @@ -2687,6 +2731,8 @@ static void chat(struct client_state *csp) * and there isn't anything * we can do about it. */ + log_error(LOG_LEVEL_INFO, + "MS IIS5 hack didn't produce valid headers."); break; } else @@ -2710,10 +2756,35 @@ static void chat(struct client_state *csp) return; } - /* we have now received the entire header. + assert(csp->headers->first->str); + assert(!http->ssl); + if (strncmpic(csp->headers->first->str, "HTTP", 4) && + strncmpic(csp->headers->first->str, "ICY", 3)) + { + /* + * It doesn't look like a HTTP (or Shoutcast) response: + * tell the client and log the problem. + */ + if (strlen(csp->headers->first->str) > 30) + { + csp->headers->first->str[30] = '\0'; + } + log_error(LOG_LEVEL_ERROR, + "Invalid server or forwarder response. Starts with: %s", + csp->headers->first->str); + log_error(LOG_LEVEL_CLF, + "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd); + write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE, + strlen(INVALID_SERVER_HEADERS_RESPONSE)); + free_http_request(http); + return; + } + + /* + * We have now received the entire server header, * filter it and send the result to the client */ - if (JB_ERR_OK != sed(server_patterns, add_server_headers, csp)) + if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS)) { log_error(LOG_LEVEL_FATAL, "Failed to parse server headers."); } @@ -2739,20 +2810,6 @@ static void chat(struct client_state *csp) if (!http->ssl) /* We talk plaintext */ { - -#ifdef FEATURE_KILL_POPUPS - /* Start blocking popups if appropriate. */ - if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */ - (csp->action->flags & ACTION_NO_POPUPS) != 0) /* Policy allows */ - { - block_popups_now = 1; - /* - * Filter the part of the body that came in the same read - * as the last headers: - */ - filter_popups(csp->iob->cur, csp); - } -#endif /* def FEATURE_KILL_POPUPS */ content_filter = get_filter_function(csp); } /* @@ -2766,7 +2823,7 @@ static void chat(struct client_state *csp) */ if (write_socket(csp->cfd, hdr, strlen(hdr)) - || ((len = flush_socket(csp->cfd, csp)) < 0)) + || ((len = flush_socket(csp->cfd, csp->iob)) < 0)) { log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E"); @@ -2793,6 +2850,8 @@ static void chat(struct client_state *csp) */ if (ms_iis5_hack) { + log_error(LOG_LEVEL_INFO, + "Closed server connection detected with MS IIS5 hack enabled."); break; } } @@ -2871,7 +2930,7 @@ static int32 server_thread(void *data) #endif -#if defined(unix) +#if !defined(_WIN32) || defined(_WIN_CONSOLE) /********************************************************************* * * Function : usage @@ -2892,7 +2951,7 @@ static void usage(const char *myname) #endif /* defined(unix) */ "[--help] " #if defined(unix) - "[--no-daemon] [--pidfile pidfile] [--user user[.group]] " + "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] " #endif /* defined(unix) */ "[--version] [configfile]\n" "Aborting\n", myname); @@ -2900,9 +2959,100 @@ static void usage(const char *myname) exit(2); } -#endif /* defined(unix) */ +#endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */ + + +#ifdef MUTEX_LOCKS_AVAILABLE +/********************************************************************* + * + * Function : privoxy_mutex_lock + * + * Description : Locks a mutex. + * + * Parameters : + * 1 : mutex = The mutex to lock. + * + * Returns : Void. May exit in case of errors. + * + *********************************************************************/ +void privoxy_mutex_lock(privoxy_mutex_t *mutex) +{ +#ifdef FEATURE_PTHREAD + int err = pthread_mutex_lock(mutex); + if (err) + { + if (mutex != &log_mutex) + { + log_error(LOG_LEVEL_FATAL, + "Mutex locking failed: %s.\n", strerror(err)); + } + exit(1); + } +#else + EnterCriticalSection(mutex); +#endif /* def FEATURE_PTHREAD */ +} + + +/********************************************************************* + * + * Function : privoxy_mutex_unlock + * + * Description : Unlocks a mutex. + * + * Parameters : + * 1 : mutex = The mutex to unlock. + * + * Returns : Void. May exit in case of errors. + * + *********************************************************************/ +void privoxy_mutex_unlock(privoxy_mutex_t *mutex) +{ +#ifdef FEATURE_PTHREAD + int err = pthread_mutex_unlock(mutex); + if (err) + { + if (mutex != &log_mutex) + { + log_error(LOG_LEVEL_FATAL, + "Mutex unlocking failed: %s.\n", strerror(err)); + } + exit(1); + } +#else + LeaveCriticalSection(mutex); +#endif /* def FEATURE_PTHREAD */ +} +/********************************************************************* + * + * Function : privoxy_mutex_init + * + * Description : Prepares a mutex. + * + * Parameters : + * 1 : mutex = The mutex to initialize. + * + * Returns : Void. May exit in case of errors. + * + *********************************************************************/ +static void privoxy_mutex_init(privoxy_mutex_t *mutex) +{ +#ifdef FEATURE_PTHREAD + int err = pthread_mutex_init(mutex, 0); + if (err) + { + printf("Fatal error. Mutex initialization failed: %s.\n", + strerror(err)); + exit(1); + } +#else + InitializeCriticalSection(mutex); +#endif /* def FEATURE_PTHREAD */ +} +#endif /* def MUTEX_LOCKS_AVAILABLE */ + /********************************************************************* * * Function : initialize_mutexes @@ -2916,15 +3066,13 @@ static void usage(const char *myname) *********************************************************************/ static void initialize_mutexes(void) { - int err = 0; - -#ifdef FEATURE_PTHREAD +#ifdef MUTEX_LOCKS_AVAILABLE /* * Prepare global mutex semaphores */ - err = pthread_mutex_init(&log_mutex, 0); + privoxy_mutex_init(&log_mutex); - if (!err) err = pthread_mutex_init(&log_init_mutex, 0); + privoxy_mutex_init(&log_init_mutex); /* * XXX: The assumptions below are a bit naive @@ -2935,37 +3083,24 @@ static void initialize_mutexes(void) * thread safe. */ #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) - if (!err) err = pthread_mutex_init(&resolver_mutex, 0); + privoxy_mutex_init(&resolver_mutex); #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */ /* * XXX: should we use a single mutex for * localtime() and gmtime() as well? */ #ifndef HAVE_GMTIME_R - if (!err) err = pthread_mutex_init(&gmtime_mutex, 0); + privoxy_mutex_init(&gmtime_mutex); #endif /* ndef HAVE_GMTIME_R */ #ifndef HAVE_LOCALTIME_R - if (!err) err = pthread_mutex_init(&localtime_mutex, 0); + privoxy_mutex_init(&localtime_mutex); #endif /* ndef HAVE_GMTIME_R */ #ifndef HAVE_RANDOM - if (!err) err = pthread_mutex_init(&rand_mutex, 0); + privoxy_mutex_init(&rand_mutex); #endif /* ndef HAVE_RANDOM */ -#endif /* FEATURE_PTHREAD */ - - /* - * TODO: mutex support for mingw32 would be swell. - */ - - if (err) - { - printf("Fatal error. Mutex initialization failed: %s.\n", - strerror(err)); - exit(1); - } - - return; +#endif /* def MUTEX_LOCKS_AVAILABLE */ } @@ -3005,6 +3140,7 @@ int main(int argc, const char *argv[]) struct group *grp = NULL; char *p; int do_chroot = 0; + char *pre_chroot_nslookup_to_load_resolver = NULL; #endif Argc = argc; @@ -3022,7 +3158,7 @@ int main(int argc, const char *argv[]) * Parse the command line arguments * * XXX: simply printing usage information in case of - * invalid arguments isn't particular user friendly. + * invalid arguments isn't particularly user friendly. */ while (++argc_pos < argc) { @@ -3099,6 +3235,12 @@ int main(int argc, const char *argv[]) if (p != NULL) *--p = '\0'; } + else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0) + { + if (++argc_pos == argc) usage(argv[0]); + pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]); + } + else if (strcmp(argv[argc_pos], "--chroot" ) == 0) { do_chroot = 1; @@ -3158,6 +3300,7 @@ int main(int argc, const char *argv[]) files->next = NULL; clients->next = NULL; + /* XXX: factor out initialising after the next stable release. */ #ifdef AMIGA InitAmiga(); #elif defined(_WIN32) @@ -3167,6 +3310,9 @@ int main(int argc, const char *argv[]) /* Prepare mutexes if supported and necessary. */ initialize_mutexes(); + /* Enable logging until further notice. */ + init_log_module(Argv[0]); + random_seed = (unsigned int)time(NULL); #ifdef HAVE_RANDOM srandom(random_seed); @@ -3277,10 +3423,9 @@ int main(int argc, const char *argv[]) close ( fd ); } #endif /* 1 */ - /* FIXME: should close stderr (fd 2) here too, but the test - * for existence - * and load config file is done in listen_loop() and puts - * some messages on stderr there. + /* + * stderr (fd 2) will be closed later on, when the + * log file has been parsed. */ close( 0 ); @@ -3307,6 +3452,14 @@ int main(int argc, const char *argv[]) { log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name); } + /* Read the time zone file from /etc before doing chroot. */ + tzset(); + if (NULL != pre_chroot_nslookup_to_load_resolver + && '\0' != pre_chroot_nslookup_to_load_resolver[0]) + { + /* Initialize resolver library. */ + (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver); + } if (chroot(pw->pw_dir) < 0) { log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir); @@ -3402,16 +3555,7 @@ static jb_socket bind_port_helper(struct configuration_spec * config) int result; jb_socket bfd; - if ( (config->haddr != NULL) - && (config->haddr[0] == '1') - && (config->haddr[1] == '2') - && (config->haddr[2] == '7') - && (config->haddr[3] == '.') ) - { - log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only", - config->hport); - } - else if (config->haddr == NULL) + if (config->haddr == NULL) { log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses", config->hport); @@ -3511,28 +3655,11 @@ static void listen_loop(void) */ if (received_hup_signal) { - init_error_log(Argv[0], config->logfile, config->debug); + init_error_log(Argv[0], config->logfile); received_hup_signal = 0; } #endif -#ifdef __OS2__ -#ifdef FEATURE_COOKIE_JAR - /* - * Need a workaround here: we have to fclose() the jarfile, or we die because it's - * already open. I think unload_configfile() is not being run, which should do - * this work. Until that can get resolved, we'll use this workaround. - */ - if (csp) - if(csp->config) - if (csp->config->jar) - { - fclose(csp->config->jar); - csp->config->jar = NULL; - } -#endif /* FEATURE_COOKIE_JAR */ -#endif /* __OS2__ */ - if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) ) { log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp)); @@ -3586,10 +3713,10 @@ static void listen_loop(void) #ifdef FEATURE_TOGGLE if (global_toggle_state) +#endif /* def FEATURE_TOGGLE */ { csp->flags |= CSP_FLAG_TOGGLED_ON; } -#endif /* def FEATURE_TOGGLE */ if (run_loader(csp)) { @@ -3830,13 +3957,6 @@ static void listen_loop(void) #endif freez(configfile); -#ifdef FEATURE_COOKIE_JAR - if (NULL != config->jar) - { - fclose(config->jar); - } -#endif - #if defined(_WIN32) && !defined(_WIN_CONSOLE) /* Cleanup - remove taskbar icon etc. */ TermLogWindow();