X-Git-Url: http://www.privoxy.org/gitweb/?p=privoxy.git;a=blobdiff_plain;f=jcc.c;h=2dc0718e9a176c795a1d24f25e77a7cf82fba804;hp=bdb26a32c051fd835a293b08ab0ebfa018a5e651;hb=390f0eb1b038295df436210c62aabb8243680a89;hpb=17ef7337d1a41e4733c1ec662c3b1191d0c76a8a diff --git a/jcc.c b/jcc.c index bdb26a32..2dc0718e 100644 --- a/jcc.c +++ b/jcc.c @@ -1,4 +1,4 @@ -const char jcc_rcs[] = "$Id: jcc.c,v 1.81 2002/03/12 01:42:50 oes Exp $"; +const char jcc_rcs[] = "$Id: jcc.c,v 1.110 2006/12/13 14:52:53 etresoft Exp $"; /********************************************************************* * * File : $Source: /cvsroot/ijbswa/current/jcc.c,v $ @@ -7,7 +7,7 @@ const char jcc_rcs[] = "$Id: jcc.c,v 1.81 2002/03/12 01:42:50 oes Exp $"; * the main connection-handling function. * * Copyright : Written by and Copyright (C) 2001 the SourceForge - * IJBSWA team. http://ijbswa.sourceforge.net + * Privoxy team. http://www.privoxy.org/ * * Based on the Internet Junkbuster originally written * by and Copyright (C) 1997 Anonymous Coders and @@ -33,6 +33,224 @@ const char jcc_rcs[] = "$Id: jcc.c,v 1.81 2002/03/12 01:42:50 oes Exp $"; * * Revisions : * $Log: jcc.c,v $ + * Revision 1.110 2006/12/13 14:52:53 etresoft + * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both. + * + * Revision 1.109 2006/12/06 19:41:40 fabiankeil + * Privoxy is now able to run as intercepting + * proxy in combination with any packet filter + * that does the port redirection. The destination + * is extracted from the "Host:" header which + * should be available for nearly all requests. + * + * Moved HTTP snipplets into jcc.c. + * Added error message for gopher proxy requests. + * + * Revision 1.108 2006/11/28 15:38:51 fabiankeil + * Only unlink the pidfile if it's actually used. + * + * Change order of interception checks to make + * it possible to block or redirect requests for + * the cgi pages. + * + * Revision 1.107 2006/11/13 19:05:51 fabiankeil + * Make pthread mutex locking more generic. Instead of + * checking for OSX and OpenBSD, check for FEATURE_PTHREAD + * and use mutex locking unless there is an _r function + * available. Better safe than sorry. + * + * Fixes "./configure --disable-pthread" and should result + * in less threading-related problems on pthread-using platforms, + * but it still doesn't fix BR#1122404. + * + * Revision 1.106 2006/11/06 19:58:23 fabiankeil + * Move pthread.h inclusion from jcc.c to jcc.h. + * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE). + * + * Revision 1.105 2006/11/06 14:26:02 fabiankeil + * Don't exit after receiving the second SIGHUP on Solaris. + * + * Fixes BR 1052235, but the same problem may exist on other + * systems. Once 3.0.6 is out we should use sigset() + * where available and see if it breaks anything. + * + * Revision 1.104 2006/09/23 13:26:38 roro + * Replace TABs by spaces in source code. + * + * Revision 1.103 2006/09/21 12:54:43 fabiankeil + * Fix +redirect{}. Didn't work with -fast-redirects. + * + * Revision 1.102 2006/09/06 13:03:04 fabiankeil + * Respond with 400 and a short text message + * if the client tries to use Privoxy as FTP proxy. + * + * Revision 1.101 2006/09/06 09:23:37 fabiankeil + * Make number of retries in case of forwarded-connect problems + * a config file option (forwarded-connect-retries) and use 0 as + * default. + * + * Revision 1.100 2006/09/03 19:42:59 fabiankeil + * Set random(3) seed. + * + * Revision 1.99 2006/09/02 15:36:42 fabiankeil + * Follow the OpenBSD port's lead and protect the resolve + * functions on OpenBSD as well. + * + * Revision 1.98 2006/08/24 11:01:34 fabiankeil + * --user fix. Only use the user as group if no group is specified. + * Solves BR 1492612. Thanks to Spinor S. and David Laight. + * + * Revision 1.97 2006/08/18 15:23:17 david__schmidt + * Windows service (re-)integration + * + * The new args are: + * + * --install[:service_name] + * --uninstall[:service_name] + * --service + * + * They work as follows: + * --install will create a service for you and then terminate. + * By default the service name will be "privoxy" (without the quotes). + * However you can run multiple services if you wish, just by adding + * a colon and then a name (no spaces). + * + * --uninstall follows the exact same rules a --install. + * + * --service is used when the program is executed by the service + * control manager, and in normal circumstances would never be + * used as a command line argument. + * + * Revision 1.96 2006/08/15 20:12:36 david__schmidt + * Windows service integration + * + * Revision 1.95 2006/08/03 02:46:41 david__schmidt + * Incorporate Fabian Keil's patch work: +http://www.fabiankeil.de/sourcecode/privoxy/ + * + * Revision 1.94 2006/07/18 14:48:46 david__schmidt + * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch) + * with what was really the latest development (the v_3_0_branch branch) + * + * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt + * Thanks to Jindrich Makovicka for a race condition fix for the log + * file. The race condition remains for non-pthread implementations. + * Reference patch #1175720. + * + * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt + * Add the ability to check jpeg images for invalid + * lengths of comment blocks. Defensive strategy + * against the exploit: + * Microsoft Security Bulletin MS04-028 + * Buffer Overrun in JPEG Processing (GDI+) Could + * Allow Code Execution (833987) + * Enabled with +inspect-jpegs in actions files. + * + * Revision 1.92.2.14 2003/12/12 12:52:53 oes + * - Fixed usage info for non-unix platforms + * - Fixed small cmdline parsing bug + * + * Revision 1.92.2.13 2003/11/27 19:20:27 oes + * Diagnostics: Now preserve the returncode of pthread_create + * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer. + * + * Revision 1.92.2.12 2003/07/11 11:34:19 oes + * No longer ignore SIGCHLD. Fixes bug #769381 + * + * Revision 1.92.2.11 2003/05/14 12:32:02 oes + * Close jarfile on graceful exit, remove stray line + * + * Revision 1.92.2.10 2003/05/08 15:13:46 oes + * Cosmetics: Killed a warning, a typo and an allocation left at exit + * + * Revision 1.92.2.9 2003/04/03 15:08:42 oes + * No longer rely on non-POSIX.1 extensions of getcwd(). + * Fixes bug #711001 + * + * Revision 1.92.2.8 2003/03/31 13:12:32 oes + * Replaced setenv() by posix-compliant putenv() + * Thanks to Neil McCalden (nmcc AT users.sf.net). + * + * Revision 1.92.2.7 2003/03/17 16:48:59 oes + * Added chroot ability, thanks to patch by Sviatoslav Sviridov + * + * Revision 1.92.2.6 2003/03/11 11:55:00 oes + * Clean-up and extension of improvements for forked mode: + * - Child's return code now consists of flags RC_FLAG_* + * - Reporting toggle to parent now properly #ifdef'ed + * - Children now report blocking to parent. This enables + * statistics in forked mode + * + * Revision 1.92.2.5 2003/03/10 23:45:32 oes + * Fixed bug #700381: Non-Threaded version now capable of being toggled. + * Children now report having been toggled through _exit(17), parents + * watch for that code and toggle themselves if found. + * + * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt + * Wrapping all *_r functions (the non-_r versions of them) with + * mutex semaphores for OSX. Hopefully this will take care of all + * of those pesky crash reports. + * + * Revision 1.92.2.3 2003/02/28 12:53:06 oes + * Fixed two mostly harmless mem leaks + * + * Revision 1.92.2.2 2002/11/20 14:37:47 oes + * Fix: Head of global clients list now initialized to NULL + * + * Revision 1.92.2.1 2002/09/25 14:52:24 oes + * Added basic support for OPTIONS and TRACE HTTP methods: + * - New interceptor direct_response() added in chat(). + * - sed() moved to earlier in the process, so that the + * Host: header is evaluated before actions and forwarding + * are decided on. + * + * Revision 1.92 2002/05/08 16:00:46 oes + * Chat's buffer handling: + * - Fixed bug with unchecked out-of-mem conditions + * while reading client request & server headers + * - No longer predict if the buffer limit will be exceeded + * in the next read -- check add_to_iob's new + * return code. If buffer couldn't be extended + * (policy or out-of-mem) while + * - reading from client: abort + * - reading server headers: send error page + * - buffering server body for filter: flush, + * and if that fails: send error page + * + * Revision 1.91 2002/04/08 20:35:58 swa + * fixed JB spelling + * + * Revision 1.90 2002/04/02 14:57:28 oes + * Made sending wafers independent of FEATURE_COOKIE_JAR + * + * Revision 1.89 2002/03/31 17:18:59 jongfoster + * Win32 only: Enabling STRICT to fix a VC++ compile warning. + * + * Revision 1.88 2002/03/27 14:32:43 david__schmidt + * More compiler warning message maintenance + * + * Revision 1.87 2002/03/26 22:29:54 swa + * we have a new homepage! + * + * Revision 1.86 2002/03/25 17:04:55 david__schmidt + * Workaround for closing the jarfile before load_config() comes around again + * + * Revision 1.85 2002/03/24 15:23:33 jongfoster + * Name changes + * + * Revision 1.84 2002/03/24 13:25:43 swa + * name change related issues + * + * Revision 1.83 2002/03/16 23:54:06 jongfoster + * Adding graceful termination feature, to help look for memory leaks. + * If you enable this (which, by design, has to be done by hand + * editing config.h) and then go to http://i.j.b/die, then the program + * will exit cleanly after the *next* request. It should free all the + * memory that was used. + * + * Revision 1.82 2002/03/13 00:27:05 jongfoster + * Killing warnings + * * Revision 1.81 2002/03/12 01:42:50 oes * Introduced modular filters * @@ -499,12 +717,11 @@ const char jcc_rcs[] = "$Id: jcc.c,v 1.81 2002/03/12 01:42:50 oes Exp $"; #include #include -#ifdef FEATURE_PTHREAD -#include -#endif /* def FEATURE_PTHREAD */ - #ifdef _WIN32 # ifndef FEATURE_PTHREAD +# ifndef STRICT +# define STRICT +# endif # include # include # endif /* ndef FEATURE_PTHREAD */ @@ -513,6 +730,7 @@ const char jcc_rcs[] = "$Id: jcc.c,v 1.81 2002/03/12 01:42:50 oes Exp $"; # ifndef _WIN_CONSOLE # include "w32log.h" # endif /* ndef _WIN_CONSOLE */ +# include "w32svrapi.h" #else /* ifndef _WIN32 */ @@ -583,6 +801,9 @@ int urls_read = 0; /* total nr of urls read inc rejected */ int urls_rejected = 0; /* total nr of urls rejected */ #endif /* def FEATURE_STATISTICS */ +#ifdef FEATURE_GRACEFUL_TERMINATION +int g_terminate = 0; +#endif static void listen_loop(void); static void chat(struct client_state *csp); @@ -604,8 +825,29 @@ 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; + +#ifndef HAVE_GMTIME_R +pthread_mutex_t gmtime_mutex; +#endif /* ndef HAVE_GMTIME_R */ + +#ifndef HAVE_LOCALTIME_R +pthread_mutex_t localtime_mutex; +#endif /* ndef HAVE_GMTIME_R */ + +#ifndef HAVE_GETHOSTBYADDR_R +pthread_mutex_t gethostbyaddr_mutex; +#endif /* ndef HAVE_GETHOSTBYADDR_R */ + +#ifndef HAVE_GETHOSTBYNAME_R +pthread_mutex_t gethostbyname_mutex; +#endif /* ndef HAVE_GETHOSTBYNAME_R */ +#endif /* FEATURE_PTHREAD */ + #if defined(unix) || defined(__EMX__) -const char *basedir; +const char *basedir = NULL; const char *pidfile = NULL; int received_hup_signal = 0; #endif /* defined unix */ @@ -620,6 +862,36 @@ static const char VANILLA_WAFER[] = "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_" "(copyright_or_otherwise)_applying_to_any_cookie._"; +/* HTTP snipplets. */ +const char CSUCCEED[] = + "HTTP/1.0 200 Connection established\n" + "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n"; + +const char CHEADER[] = + "HTTP/1.0 400 Invalid header received from browser\r\n" + "Connection: close\r\n\r\n" + "Invalid header received from browser."; + +const char CFORBIDDEN[] = + "HTTP/1.0 403 Connection not allowable\r\n" + "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n" + "Connection: close\r\n\r\n"; + +const char FTP_RESPONSE[] = + "HTTP/1.0 400 Invalid request received from browser\r\n" + "Connection: close\r\n\r\n" + "Invalid request. Privoxy doesn't support FTP.\r\n"; + +const char GOPHER_RESPONSE[] = + "HTTP/1.0 400 Invalid request received from browser\r\n" + "Connection: close\r\n\r\n" + "Invalid request. Privoxy doesn't support gopher.\r\n"; + +const char MISSING_DESTINATION_RESPONSE[] = + "HTTP/1.0 400 Bad request received from browser\r\n" + "Connection: close\r\n\r\n" + "Bad request. Privoxy was unable to extract the destination.\r\n"; + #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA) /********************************************************************* @@ -641,12 +913,14 @@ static void sig_handler(int the_signal) { switch(the_signal) { - case SIGABRT: case SIGTERM: case SIGINT: log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal); #if defined(unix) - unlink(pidfile); + if(pidfile) + { + unlink(pidfile); + } #endif /* unix */ exit(the_signal); break; @@ -720,6 +994,8 @@ static void chat(struct client_state *csp) int server_body; int ms_iis5_hack = 0; int byte_count = 0; + unsigned int forwarded_connect_retries = 0; + unsigned int max_forwarded_connect_retries = csp->config->forwarded_connect_retries; const struct forward_spec * fwd; struct http_request *http; int len; /* for buffer sizes */ @@ -730,6 +1006,7 @@ static void chat(struct client_state *csp) int pcrs_filter; /* bool, 1==will filter through pcrs */ int gif_deanimate; /* bool, 1==will deanimate gifs */ + int jpeg_inspect; /* bool, 1==will inspect jpegs */ /* Function that does the content filtering for the current request */ char *(*content_filter)() = NULL; @@ -737,6 +1014,10 @@ static void chat(struct client_state *csp) /* Skeleton for HTTP response, if we should intercept the request */ struct http_response *rsp; + /* Temporary copy of the client's headers before they get enlisted in csp->headers */ + struct list header_list; + struct list *headers = &header_list; + http = csp->http; /* @@ -749,8 +1030,15 @@ static void chat(struct client_state *csp) len = read_socket(csp->cfd, buf, sizeof(buf)); if (len <= 0) break; /* error! */ - - 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 + */ + if (add_to_iob(csp, buf, len)) + { + return; + } req = get_header(csp); @@ -764,6 +1052,38 @@ static void chat(struct client_state *csp) continue; /* more to come! */ } + /* + * If it's a FTP or gopher request, we don't support it. + * + * These checks are better than nothing, but they might + * not work in all configurations and some clients might + * have problems digesting the answer. + * + * They should, however, never cause more problems than + * Privoxy's old behaviour (returning the misleading HTML error message: + * "Could not resolve http://(ftp|gopher)://example.org"). + */ + if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13)) + { + if (!strncmpic(req, "GET ftp://", 10)) + { + strcpy(buf, FTP_RESPONSE); + log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s", + csp->ip_addr_str, req); + } + else + { + strcpy(buf, GOPHER_RESPONSE); + log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s", + csp->ip_addr_str, 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)); + free_http_request(http); + return; + } + #ifdef FEATURE_FORCE_LOAD /* If this request contains the FORCE_PREFIX, * better get rid of it now and set the force flag --oes @@ -778,7 +1098,16 @@ static void chat(struct client_state *csp) #endif /* def FEATURE_FORCE_LOAD */ - parse_http_request(req, http, csp); + switch( parse_http_request(req, http, csp) ) + { + case JB_ERR_MEMORY: + log_error(LOG_LEVEL_ERROR, "Out of memory while parsing request."); + break; + case JB_ERR_PARSE: + log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", req); + break; + } + freez(req); break; } @@ -790,9 +1119,77 @@ static void chat(struct client_state *csp) log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str); + free_http_request(http); return; } + /* grab the rest of the client's headers */ + init_list(headers); + for (;;) + { + if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) ) + { + len = read_socket(csp->cfd, buf, sizeof(buf)); + if (len <= 0) + { + log_error(LOG_LEVEL_ERROR, "read from client failed: %E"); + 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)) + { + return; + } + continue; + } + + if (p == NULL) break; + + enlist(headers, p); + freez(p); + + } + + if (http->host == NULL) + { + /* + * Intercepted or invalid request without domain + * inside the request line. Try to get it another way. + */ + if (JB_ERR_OK == get_destination_from_headers(headers, http)) + { + /* Split the domain we just got for pattern matching */ + init_domain_components(http); + } + else + { + /* We can't work without destination. Go spread the news.*/ + + req = list_to_text(headers); + chomp(req); + log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, http->cmd); + log_error(LOG_LEVEL_ERROR, + "Privoxy was unable to get the destination for %s's request:\n%s\n%s", + csp->ip_addr_str, http->cmd, req); + freez(req); + + strcpy(buf, MISSING_DESTINATION_RESPONSE); + write_socket(csp->cfd, buf, strlen(buf)); + free_http_request(http); + destroy_list(headers); + return; + } + /* + * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort + * to get the destination IP address, use it as host directly + * or do a reverse DNS lookup first. + */ + } + /* decide how to route the HTTP request */ if ((fwd = forward_url(http, csp)) == NULL) @@ -864,13 +1261,22 @@ static void chat(struct client_state *csp) || (csp->action->flags & ACTION_LIMIT_CONNECT && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) ) { - strcpy(buf, CFORBIDDEN); - write_socket(csp->cfd, buf, strlen(buf)); - - log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str); - log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str); - - return; + if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS) + { + /* The response will violate the specs, but makes unblocking easier. */ + log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.", + csp->ip_addr_str); + csp->action->flags |= ACTION_BLOCK; + http->ssl = 0; + } + else + { + strcpy(buf, CFORBIDDEN); + write_socket(csp->cfd, buf, strlen(buf)); + log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str); + log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str); + return; + } } } @@ -921,31 +1327,30 @@ static void chat(struct client_state *csp) { string_append(&http->cmd, http->path); } - string_append(&http->cmd, " "); string_append(&http->cmd, http->ver); if (http->cmd == NULL) { - log_error(LOG_LEVEL_FATAL, "Out of memory rewiting SSL command"); + log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command"); } + log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd); } enlist(csp->headers, http->cmd); + /* Append the previously read headers */ + list_append_list_unique(csp->headers, headers); + destroy_list(headers); -#ifdef FEATURE_COOKIE_JAR /* - * If we're logging cookies in a cookie jar, and 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 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 ((csp->config->jarfile != NULL) - && list_is_empty(csp->action->multi[ACTION_MULTI_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); } -#endif /* def FEATURE_COOKIE_JAR */ #ifdef FEATURE_KILL_POPUPS @@ -957,35 +1362,16 @@ static void chat(struct client_state *csp) gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0); - /* grab the rest of the client's headers */ + jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0); - for (;;) - { - if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) ) - { - len = read_socket(csp->cfd, buf, sizeof(buf)); - if (len <= 0) - { - log_error(LOG_LEVEL_ERROR, "read from client failed: %E"); - return; - } - add_to_iob(csp, buf, len); - continue; - } - - if (p == NULL) break; - - enlist(csp->headers, p); - freez(p); - } /* * We have a request. Now, check to see if we need to * intercept it, i.e. If .. */ if ( - /* a CGI call was detected and answered */ - (NULL != (rsp = dispatch_cgi(csp))) + /* We may not forward the request by rfc2616 sect 14.31 */ + (NULL != (rsp = direct_response(csp))) /* or we are enabled and... */ || (IS_ENABLED_AND ( @@ -998,13 +1384,19 @@ static void chat(struct client_state *csp) || ( NULL != (rsp = trust_url(csp))) #endif /* def FEATURE_TRUST */ - /* ..or a fast redirect kicked in */ -#ifdef FEATURE_FAST_REDIRECTS - || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) && - (NULL != (rsp = redirect_url(csp)))) -#endif /* def FEATURE_FAST_REDIRECTS */ + /* ..or a redirect kicked in */ + || ( NULL != (rsp = redirect_url(csp))) )) - ) + + /* + * .. or a CGI call was detected and answered. + * + * This check comes last to give the user the power + * to deny acces to some (or all) of the cgi pages. + */ + || (NULL != (rsp = dispatch_cgi(csp))) + + ) { /* Write the answer to the client */ if (write_socket(csp->cfd, rsp->head, rsp->head_length) @@ -1018,7 +1410,7 @@ static void chat(struct client_state *csp) csp->flags |= CSP_FLAG_REJECTED; #endif /* def FEATURE_STATISTICS */ - /* Log (FIXME: All intercept reasons apprear as "crunch" with Status 200) */ + /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */ log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path); log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd); @@ -1027,6 +1419,15 @@ static void chat(struct client_state *csp) return; } + hdr = sed(client_patterns, add_client_headers, csp); + if (hdr == NULL) + { + /* FIXME Should handle error properly */ + log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header"); + } + + list_remove_all(csp->headers); + log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path); if (fwd->forward_host) @@ -1041,7 +1442,12 @@ static void chat(struct client_state *csp) /* here we connect to the server, gateway, or the forwarder */ - csp->sfd = forwarded_connect(fwd, http, csp); + while ( (csp->sfd = forwarded_connect(fwd, http, csp)) + && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries)) + { + log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.", + forwarded_connect_retries, http->hostport); + } if (csp->sfd == JB_INVALID_SOCKET) { @@ -1075,20 +1481,12 @@ static void chat(struct client_state *csp) } free_http_response(rsp); + freez(hdr); return; } log_error(LOG_LEVEL_CONNECT, "OK"); - hdr = sed(client_patterns, add_client_headers, csp); - if (hdr == NULL) - { - /* FIXME Should handle error properly */ - log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header"); - } - - list_remove_all(csp->headers); - if (fwd->forward_host || (http->ssl == 0)) { /* write the client's (modified) header to the server @@ -1279,7 +1677,8 @@ static void chat(struct client_state *csp) csp->content_length = csp->iob->eod - csp->iob->cur; } - hdr = sed(server_patterns, add_server_headers, csp); + hdr = sed(server_patterns_light, NULL, csp); + if (hdr == NULL) { /* FIXME Should handle error properly */ @@ -1290,13 +1689,13 @@ static void chat(struct client_state *csp) || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length)) { log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E"); + freez(hdr); + freez(p); return; } freez(hdr); - if (NULL != p) { - freez(p); - } + freez(p); } break; /* "game over, man" */ @@ -1326,41 +1725,50 @@ static void chat(struct client_state *csp) { if (content_filter) { - add_to_iob(csp, buf, len); - /* - * If the buffer limit will be reached on the next read, - * switch to non-filtering mode, i.e. make & write the - * header, flush the socket and get out of the way. + * If there is no memory left for buffering the content, or the buffer limit + * has been reached, switch to non-filtering mode, i.e. make & write the + * header, flush the iob and buf, and get out of the way. */ - if (((size_t)(csp->iob->eod - csp->iob->buf)) + (size_t)BUFFER_SIZE > csp->config->buffer_limit) + if (add_to_iob(csp, buf, len)) { size_t hdrlen; + int flushed; - log_error(LOG_LEVEL_ERROR, "Buffer size limit reached! Flushing and stepping back."); + log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering."); hdr = sed(server_patterns, add_server_headers, csp); if (hdr == NULL) { - /* FIXME Should handle error properly */ - log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header"); + /* + * Memory is too tight to even generate the header. + * Send our static "Out-of-memory" page. + */ + log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush."); + rsp = cgi_error_memory(); + + if (write_socket(csp->cfd, rsp->head, rsp->head_length) + || write_socket(csp->cfd, rsp->body, rsp->content_length)) + { + log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host); + } + return; } hdrlen = strlen(hdr); - byte_count += hdrlen; if (write_socket(csp->cfd, hdr, hdrlen) - || ((len = flush_socket(csp->cfd, csp)) < 0)) + || ((flushed = flush_socket(csp->cfd, csp)) < 0) + || (write_socket(csp->cfd, buf, (size_t) len))) { - log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E"); + log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E"); freez(hdr); return; } + byte_count += hdrlen + flushed + len; freez(hdr); - byte_count += len; - content_filter = NULL; server_body = 1; @@ -1384,8 +1792,23 @@ static void chat(struct client_state *csp) * parsing an "out of body experience" ? */ - /* buffer up the data we just read */ - add_to_iob(csp, buf, len); + /* + * buffer up the data we just read. If that fails, + * there's little we can do but send our static + * out-of-memory page. + */ + if (add_to_iob(csp, buf, len)) + { + log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers."); + rsp = cgi_error_memory(); + + if (write_socket(csp->cfd, rsp->head, rsp->head_length) + || write_socket(csp->cfd, rsp->body, rsp->content_length)) + { + log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host); + } + return; + } /* get header lines from the iob */ @@ -1468,13 +1891,22 @@ static void chat(struct client_state *csp) /* Buffer and gif_deanimate this if appropriate. */ - if ((csp->content_type & CT_GIF) && /* It's a image/gif MIME-Type */ + if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */ !http->ssl && /* We talk plaintext */ gif_deanimate) /* Policy allows */ { content_filter = gif_deanimate_response; } + /* Buffer and jpg_inspect this if appropriate. */ + + if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */ + !http->ssl && /* We talk plaintext */ + jpeg_inspect) /* Policy allows */ + { + content_filter = jpeg_inspect_response; + } + /* * Only write if we're not buffering for content modification */ @@ -1594,8 +2026,12 @@ static int32 server_thread(void *data) *********************************************************************/ void usage(const char *myname) { - printf("JunkBuster proxy version " VERSION " (" HOME_PAGE_URL ")\n" + printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n" +#if !defined(unix) + "Usage: %s [--help] [--version] [configfile]\n" +#else "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n" +#endif "Aborting.\n", myname); exit(2); @@ -1633,10 +2069,14 @@ int main(int argc, const char *argv[]) #endif { int argc_pos = 0; +#ifdef HAVE_RANDOM + unsigned int random_seed; +#endif /* ifdef HAVE_RANDOM */ #ifdef unix struct passwd *pw = NULL; struct group *grp = NULL; char *p; + int do_chroot = 0; #endif Argc = argc; @@ -1655,6 +2095,32 @@ int main(int argc, const char *argv[]) */ while (++argc_pos < argc) { +#ifdef _WIN32 + /* Check to see if the service must be installed or uninstalled */ + if (strncmp(argv[argc_pos], "--install", 9) == 0) + { + const char *pName = argv[argc_pos] + 9; + if (*pName == ':') + pName++; + exit( (install_service(pName)) ? 0 : 1 ); + } + else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0) + { + const char *pName = argv[argc_pos] + 11; + if (*pName == ':') + pName++; + exit((uninstall_service(pName)) ? 0 : 1); + } + else if (strcmp(argv[argc_pos], "--service" ) == 0) + { + bRunAsService = TRUE; + w32_set_service_cwd(); + atexit(w32_service_exit_notify); + } + else +#endif /* defined(_WIN32) */ + + #if !defined(_WIN32) || defined(_WIN_CONSOLE) if (strcmp(argv[argc_pos], "--help") == 0) @@ -1664,15 +2130,17 @@ int main(int argc, const char *argv[]) else if(strcmp(argv[argc_pos], "--version") == 0) { - printf("Junkbuster version " VERSION " (" HOME_PAGE_URL ")\n"); + printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"); exit(0); } +#if defined(unix) + else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0) { no_daemon = 1; } -#if defined(unix) + else if (strcmp(argv[argc_pos], "--pidfile" ) == 0) { if (++argc_pos == argc) usage(argv[0]); @@ -1699,8 +2167,13 @@ int main(int argc, const char *argv[]) if (p != NULL) *--p = '\0'; } + + else if (strcmp(argv[argc_pos], "--chroot" ) == 0) + { + do_chroot = 1; + } + #endif /* defined(unix) */ - else #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */ { configfile = argv[argc_pos]; @@ -1711,16 +2184,17 @@ int main(int argc, const char *argv[]) #if defined(unix) if ( *configfile != '/' ) { - char *abs_file; + char *abs_file, cwd[1024]; /* make config-filename absolute here */ - if ( !(basedir = getcwd( NULL, 1024 ))) + if ( !(getcwd(cwd, sizeof(cwd)))) { perror("get working dir failed"); exit( 1 ); } - if ( !(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))) + if (!(basedir = strdup(cwd)) + || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 )))) { perror("malloc failed"); exit( 1 ); @@ -1734,6 +2208,7 @@ int main(int argc, const char *argv[]) files->next = NULL; + clients->next = NULL; #ifdef AMIGA InitAmiga(); @@ -1741,23 +2216,55 @@ int main(int argc, const char *argv[]) InitWin32(); #endif +#ifdef FEATURE_PTHREAD + /* + * Prepare global mutex semaphores + */ + pthread_mutex_init(&log_mutex,0); + pthread_mutex_init(&log_init_mutex,0); + +#ifndef HAVE_GMTIME_R + pthread_mutex_init(&gmtime_mutex,0); +#endif /* ndef HAVE_GMTIME_R */ + +#ifndef HAVE_LOCALTIME_R + pthread_mutex_init(&localtime_mutex,0); +#endif /* ndef HAVE_GMTIME_R */ + +#ifndef HAVE_GETHOSTBYADDR_R + pthread_mutex_init(&gethostbyaddr_mutex,0); +#endif /* ndef HAVE_GETHOSTBYADDR_R */ + +#ifndef HAVE_GETHOSTBYNAME_R + pthread_mutex_init(&gethostbyname_mutex,0); +#endif /* ndef HAVE_GETHOSTBYNAME_R */ +#endif /* FEATURE_PTHREAD */ + +#ifdef HAVE_RANDOM + random_seed = (unsigned int)time(NULL); + srandom(random_seed); +#endif /* ifdef HAVE_RANDOM */ + /* * Unix signal handling * * Catch the abort, interrupt and terminate signals for a graceful exit * Catch the hangup signal so the errlog can be reopened. - * Ignore the broken pipe and child signals - * FIXME: Isn't ignoring the default for SIGCHLD anyway and why ignore SIGPIPE? + * Ignore the broken pipe signals (FIXME: Why?) */ #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA) { int idx; - const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 }; - const int ignored_signals[] = { SIGPIPE, SIGCHLD, 0 }; + const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 }; + const int ignored_signals[] = { SIGPIPE, 0 }; for (idx = 0; catched_signals[idx] != 0; idx++) { +#ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */ + if (sigset(catched_signals[idx], sig_handler) == SIG_ERR) +#else if (signal(catched_signals[idx], sig_handler) == SIG_ERR) +#endif /* ifdef sun */ { log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]); } @@ -1858,21 +2365,87 @@ int main(int argc, const char *argv[]) * to the user and group ID indicated by the --user option */ write_pid_file(); - + if (NULL != pw) { - if (((NULL != grp) && setgid(grp->gr_gid)) || (setgid(pw->pw_gid))) + if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid)) { log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions."); } + if (do_chroot) + { + if (!pw->pw_dir) + { + log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name); + } + if (chroot(pw->pw_dir) < 0) + { + log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir); + } + if (chdir ("/")) + { + log_error(LOG_LEVEL_FATAL, "Cannot chdir /"); + } + } if (setuid(pw->pw_uid)) { log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions."); } + if (do_chroot) + { + char putenv_dummy[64]; + + strcpy(putenv_dummy, "HOME=/"); + if (putenv(putenv_dummy) != 0) + { + log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME"); + } + + snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name); + if (putenv(putenv_dummy) != 0) + { + log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER"); + } + } + } + else if (do_chroot) + { + log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument."); } } #endif /* defined unix */ +#ifdef _WIN32 + /* This will be FALSE unless the command line specified --service + */ + if (bRunAsService) + { + /* Yup, so now we must attempt to establish a connection + * with the service dispatcher. This will only work if this + * process was launched by the service control manager to + * actually run as a service. If this isn't the case, i've + * known it take around 30 seconds or so for the call to return. + */ + + /* The StartServiceCtrlDispatcher won't return until the service is stopping */ + if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable)) + { + /* Service has run, and at this point is now being stopped, so just return */ + return 0; + } + +#ifdef _WIN_CONSOLE + printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n"); +#endif + /* An error occurred. Usually it's because --service was wrongly specified + * and we were unable to connect to the Service Control Dispatcher because + * it wasn't expecting us and is therefore not listening. + * + * For now, just continue below to call the listen_loop function. + */ + } +#endif /* def _WIN32 */ + listen_loop(); /* NOTREACHED */ @@ -1889,7 +2462,7 @@ int main(int argc, const char *argv[]) * on failure. * * Parameters : - * 1 : config = Junkbuster configuration. Specifies port + * 1 : config = Privoxy configuration. Specifies port * to bind to. * * Returns : Port that was opened. @@ -1928,7 +2501,7 @@ static jb_socket bind_port_helper(struct configuration_spec * config) { case -3 : log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: " - "There may be another junkbuster or some other " + "There may be another Privoxy or some other " "proxy running on port %d", (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport, config->hport); @@ -1953,6 +2526,17 @@ static jb_socket bind_port_helper(struct configuration_spec * config) } +#ifdef _WIN32 +/* Without this simple workaround we get this compiler warning from _beginthread + * warning C4028: formal parameter 1 different from declaration + */ +void w32_service_listen_loop(void *p) +{ + listen_loop(); +} +#endif /* def _WIN32 */ + + /********************************************************************* * * Function : listen_loop @@ -1974,7 +2558,11 @@ static void listen_loop(void) bfd = bind_port_helper(config); +#ifdef FEATURE_GRACEFUL_TERMINATION + while (!g_terminate) +#else for (;;) +#endif { #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__) while (waitpid(-1, NULL, WNOHANG) > 0) @@ -1999,6 +2587,23 @@ static void listen_loop(void) } #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)); @@ -2051,7 +2656,7 @@ static void listen_loop(void) } #ifdef FEATURE_TOGGLE - if (g_bToggleIJB) + if (global_toggle_state) { csp->flags |= CSP_FLAG_TOGGLED_ON; } @@ -2093,8 +2698,9 @@ static void listen_loop(void) pthread_attr_init(&attrs); pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED); - child_id = (pthread_create(&the_thread, &attrs, - (void*)serve, csp) ? -1 : 0); + errno = pthread_create(&the_thread, &attrs, + (void*)serve, csp); + child_id = errno ? -1 : 0; pthread_attr_destroy(&attrs); } #endif @@ -2110,7 +2716,7 @@ static void listen_loop(void) #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION) #define SELECTED_ONE_OPTION child_id = _beginthread( - serve, + (void(* _Optlink)(void*))serve, NULL, 64 * 1024, csp); @@ -2136,11 +2742,12 @@ static void listen_loop(void) #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION) #define SELECTED_ONE_OPTION csp->cfd = ReleaseSocket(csp->cfd, -1); + if((child_id = (int)CreateNewProcTags( NP_Entry, (ULONG)server_thread, NP_Output, Output(), NP_CloseOutput, FALSE, - NP_Name, (ULONG)"junkbuster child", + NP_Name, (ULONG)"privoxy child", NP_StackSize, 200*1024, TAG_DONE))) { @@ -2160,9 +2767,32 @@ static void listen_loop(void) */ if (child_id == 0) /* child */ { + int rc = 0; +#ifdef FEATURE_TOGGLE + int inherited_toggle_state = global_toggle_state; +#endif /* def FEATURE_TOGGLE */ + serve(csp); - _exit(0); + /* + * If we've been toggled or we've blocked the request, tell Mom + */ + +#ifdef FEATURE_TOGGLE + if (inherited_toggle_state != global_toggle_state) + { + rc |= RC_FLAG_TOGGLED; + } +#endif /* def FEATURE_TOGGLE */ + +#ifdef FEATURE_STATISTICS + if (csp->flags & CSP_FLAG_REJECTED) + { + rc |= RC_FLAG_BLOCKED; + } +#endif /* ndef FEATURE_STATISTICS */ + + _exit(rc); } else if (child_id > 0) /* parent */ { @@ -2170,9 +2800,32 @@ static void listen_loop(void) * copy of the client socket and the CSP * are not used. */ + int child_status; +#if !defined(_WIN32) && !defined(__CYGWIN__) + + wait( &child_status ); + + /* + * Evaluate child's return code: If the child has + * - been toggled, toggle ourselves + * - blocked its request, bump up the stats counter + */ + +#ifdef FEATURE_TOGGLE + if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED)) + { + global_toggle_state = !global_toggle_state; + } +#endif /* def FEATURE_TOGGLE */ + +#ifdef FEATURE_STATISTICS + urls_read++; + if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED)) + { + urls_rejected++; + } +#endif /* def FEATURE_STATISTICS */ -#if !defined(_WIN32) && defined(__CYGWIN__) - wait( NULL ); #endif /* !defined(_WIN32) && defined(__CYGWIN__) */ close_socket(csp->cfd); csp->flags &= ~CSP_FLAG_ACTIVE; @@ -2188,7 +2841,7 @@ static void listen_loop(void) log_error(LOG_LEVEL_ERROR, "can't fork: %E"); - sprintf(buf , "JunkBuster: can't fork: errno = %d", errno); + sprintf(buf , "Privoxy: can't fork: errno = %d", errno); write_socket(csp->cfd, buf, strlen(buf)); close_socket(csp->cfd); @@ -2202,7 +2855,57 @@ static void listen_loop(void) serve(csp); } } - /* NOTREACHED */ + + /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */ + + /* Clean up. Aim: free all memory (no leaks) */ +#ifdef FEATURE_GRACEFUL_TERMINATION + + log_error(LOG_LEVEL_ERROR, "Graceful termination requested"); + + unload_current_config_file(); + unload_current_actions_file(); + unload_current_re_filterfile(); +#ifdef FEATURE_TRUST + unload_current_trust_file(); +#endif + + if (config->multi_threaded) + { + int i = 60; + do + { + sleep(1); + sweep(); + } while ((clients->next != NULL) && (--i > 0)); + + if (i <= 0) + { + log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait."); + } + } + sweep(); + sweep(); + +#if defined(unix) + freez(basedir); +#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(); +#endif + + exit(0); +#endif /* FEATURE_GRACEFUL_TERMINATION */ }