X-Git-Url: http://www.privoxy.org/gitweb/?p=privoxy.git;a=blobdiff_plain;f=jcc.c;h=0d52ac628e0c319c32e29f4f49cc5c60b3345d6e;hp=9ff723b20dfafb73e7503e66db60cd72d920e5c1;hb=e7d0f5c0644064de7c224adfddf688a9fe5fc386;hpb=085c6e7a4a46674c41517ff1086551453721b65d diff --git a/jcc.c b/jcc.c index 9ff723b2..0d52ac62 100644 --- a/jcc.c +++ b/jcc.c @@ -1,19 +1,19 @@ -const char jcc_rcs[] = "$Id: jcc.c,v 1.22 2001/06/29 21:45:41 oes Exp $"; +const char jcc_rcs[] = "$Id: jcc.c,v 1.57 2001/11/16 00:47:43 jongfoster Exp $"; /********************************************************************* * * File : $Source: /cvsroot/ijbswa/current/jcc.c,v $ * - * Purpose : Main file. Contains main() method, main loop, and + * Purpose : Main file. Contains main() method, main loop, and * the main connection-handling function. * * Copyright : Written by and Copyright (C) 2001 the SourceForge * IJBSWA team. http://ijbswa.sourceforge.net * * Based on the Internet Junkbuster originally written - * by and Copyright (C) 1997 Anonymous Coders and + * by and Copyright (C) 1997 Anonymous Coders and * Junkbusters Corporation. http://www.junkbusters.com * - * This program is free software; you can redistribute it + * This program is free software; you can redistribute it * and/or modify it under the terms of the GNU General * Public License as published by the Free Software * Foundation; either version 2 of the License, or (at @@ -33,6 +33,167 @@ const char jcc_rcs[] = "$Id: jcc.c,v 1.22 2001/06/29 21:45:41 oes Exp $"; * * Revisions : * $Log: jcc.c,v $ + * Revision 1.57 2001/11/16 00:47:43 jongfoster + * Changing the tty-disconnection code to use setsid(). + * + * Revision 1.56 2001/11/13 20:20:54 jongfoster + * Tabs->spaces, fixing a bug with missing {} around an if() + * + * Revision 1.55 2001/11/13 20:14:53 jongfoster + * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic + * + * Revision 1.54 2001/11/07 00:03:14 steudten + * Give reliable return value if an error + * occurs not just 0 with new daemon mode. + * + * Revision 1.53 2001/11/05 21:41:43 steudten + * Add changes to be a real daemon just for unix os. + * (change cwd to /, detach from controlling tty, set + * process group and session leader to the own process. + * Add DBG() Macro. + * Add some fatal-error log message for failed malloc(). + * Add '-d' if compiled with 'configure --with-debug' to + * enable debug output. + * + * Revision 1.52 2001/10/26 20:11:20 jongfoster + * Fixing type mismatch + * + * Revision 1.51 2001/10/26 17:38:28 oes + * Cosmetics + * + * Revision 1.50 2001/10/25 03:40:48 david__schmidt + * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple + * threads to call select() simultaneously. So, it's time to do a real, live, + * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__ + * (native). Both versions will work, but using __OS2__ offers multi-threading. + * + * Revision 1.49 2001/10/23 21:41:35 jongfoster + * Added call to initialize the (statically-allocated of course) + * "out of memory" CGI response. + * + * Revision 1.48 2001/10/10 19:56:46 jongfoster + * Moving some code that wasn't cookie-related out of an #ifdef + * FEATURE_COOKIE_JAR + * + * Revision 1.47 2001/10/10 16:44:36 oes + * Added CONNECT destination port limitation check + * + * Revision 1.46 2001/10/08 15:17:41 oes + * Re-enabled SSL forwarding + * + * Revision 1.45 2001/10/07 15:42:11 oes + * Replaced 6 boolean members of csp with one bitmap (csp->flags) + * + * Moved downgrading of the HTTP version from parse_http_request to + * chat(), since we can't decide if it is necessary before we have + * determined the actions for the URL. The HTTP command is now + * *always* re-built so the repairs need no longer be special-cased. + * + * filter_popups now gets a csp pointer so it can raise the new + * CSP_FLAG_MODIFIED flag. + * + * Bugfix + * + * Added configurable size limit for the IOB. If the IOB grows so + * large that the next read would exceed the limit, the header + * is generated, and the header & unfiltered buffer are flushed + * to the client. Chat then continues in non-buffering, + * non-filtering body mode. + * + * Revision 1.44 2001/10/02 18:13:57 oes + * Ooops + * + * Revision 1.43 2001/10/02 15:32:13 oes + * Moved generation of hdr + * + * Revision 1.42 2001/09/21 23:02:02 david__schmidt + * Cleaning up 2 compiler warnings on OS/2. + * + * Revision 1.41 2001/09/16 17:05:14 jongfoster + * Removing unused #include showarg.h + * + * Revision 1.40 2001/09/16 15:41:45 jongfoster + * Fixing signed/unsigned comparison warning. + * + * Revision 1.39 2001/09/16 13:21:27 jongfoster + * Changes to use new list functions. + * + * Revision 1.38 2001/09/16 13:01:46 jongfoster + * Removing redundant function call that zeroed zalloc()'d memory. + * + * Revision 1.37 2001/09/10 11:12:24 oes + * Deleted unused variable + * + * Revision 1.36 2001/09/10 10:56:15 oes + * Silenced compiler warnings + * + * Revision 1.35 2001/07/31 14:44:22 oes + * Deleted unused size parameter from filter_popups() + * + * Revision 1.34 2001/07/30 22:08:36 jongfoster + * Tidying up #defines: + * - All feature #defines are now of the form FEATURE_xxx + * - Permanently turned off WIN_GUI_EDIT + * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS + * + * Revision 1.33 2001/07/29 19:32:00 jongfoster + * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance. + * + * Revision 1.32 2001/07/29 18:47:05 jongfoster + * Adding missing #include "loadcfg.h" + * + * Revision 1.31 2001/07/29 12:17:48 oes + * Applied pthread fix by Paul Lieverse + * + * Revision 1.30 2001/07/25 22:57:13 jongfoster + * __BEOS__ no longer overrides FEATURE_PTHREAD. + * This is because FEATURE_PTHREAD will soon be widely used, so I + * want to keep it simple. + * + * Revision 1.29 2001/07/24 12:47:06 oes + * Applied BeOS support update by Eugenia + * + * Revision 1.28 2001/07/23 13:26:12 oes + * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body + * + * Revision 1.27 2001/07/19 19:09:47 haroon + * - Added code to take care of the situation where while processing the first + * server response (which includes the server header), after finding the end + * of the headers we were not looking past the end of the headers for + * content modification. I enabled it for filter_popups. + * Someone else should look to see if other similar operations should be + * done to the discarded portion of the buffer. + * + * Note 2001/07/20: No, the other content modification mechanisms will process + * the whole iob later anyway. --oes + * + * Revision 1.26 2001/07/18 12:31:36 oes + * cosmetics + * + * Revision 1.25 2001/07/15 19:43:49 jongfoster + * Supports POSIX threads. + * Also removed some unused #includes. + * + * Revision 1.24 2001/07/13 14:00:40 oes + * - Generic content modification scheme: + * Each feature has its own applicability flag that is set + * from csp->action->flags. + * Replaced the "filtering" int flag , by a function pointer + * "content_filter" to the function that will do the content + * modification. If it is != NULL, the document will be buffered + * and processed through *content_filter, which must set + * csp->content_length and return a modified copy of the body + * or return NULL (on failiure). + * - Changed csp->is_text to the more generic bitmap csp->content_type + * which can currently take the valued CT_TEXT or CT_GIF + * - Reformatting etc + * - Removed all #ifdef PCRS + * + * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon + * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude + * the `block_acl' call. This prevents a compilation error when the user + * does not wish to use the "ACL" feature. + * * Revision 1.22 2001/06/29 21:45:41 oes * Indentation, CRLF->LF, Tab-> Space * @@ -220,15 +381,15 @@ const char jcc_rcs[] = "$Id: jcc.c,v 1.22 2001/06/29 21:45:41 oes Exp $"; #include #include -#ifdef _WIN32 +#ifdef FEATURE_PTHREAD +#include +#endif /* def FEATURE_PTHREAD */ -# include -# include -# include -# include -# ifdef TOGGLE -# include -# endif /* def TOGGLE */ +#ifdef _WIN32 +# ifndef FEATURE_PTHREAD +# include +# include +# endif /* ndef FEATURE_PTHREAD */ # include "win32.h" # ifndef _WIN_CONSOLE @@ -237,10 +398,18 @@ const char jcc_rcs[] = "$Id: jcc.c,v 1.22 2001/06/29 21:45:41 oes Exp $"; #else /* ifndef _WIN32 */ +# if !defined (__OS2__) # include -# include # include +# endif /* ndef __OS2__ */ +# include # include +# include + +#ifdef sun +#include +#endif /* sun */ + # include # ifdef __BEOS__ @@ -248,18 +417,30 @@ const char jcc_rcs[] = "$Id: jcc.c,v 1.22 2001/06/29 21:45:41 oes Exp $"; # include /* declarations for threads and stuff. */ # endif +# if defined(__EMX__) || defined(__OS2__) +# include /* OS/2/EMX needs a little help with select */ +# endif +# ifdef __OS2__ +#define INCL_DOS +# include +#define bzero(B,N) memset(B,0x00,n) +# endif + # ifndef FD_ZERO # include # endif #endif +#ifdef _DEBUG +int ldebug = 0; +#endif + #include "project.h" #include "list.h" #include "jcc.h" #include "filters.h" #include "loaders.h" -#include "showargs.h" #include "parsers.h" #include "killpopup.h" #include "miscutil.h" @@ -268,6 +449,7 @@ const char jcc_rcs[] = "$Id: jcc.c,v 1.22 2001/06/29 21:45:41 oes Exp $"; #include "gateway.h" #include "actions.h" #include "cgi.h" +#include "loadcfg.h" const char jcc_h_rcs[] = JCC_H_VERSION; const char project_h_rcs[] = PROJECT_H_VERSION; @@ -275,10 +457,10 @@ const char project_h_rcs[] = PROJECT_H_VERSION; struct client_state clients[1]; struct file_list files[1]; -#ifdef STATISTICS +#ifdef FEATURE_STATISTICS int urls_read = 0; /* total nr of urls read inc rejected */ int urls_rejected = 0; /* total nr of urls rejected */ -#endif /* def STATISTICS */ +#endif /* def FEATURE_STATISTICS */ static void listen_loop(void); @@ -297,6 +479,13 @@ static int32 server_thread(void *data); #define sleep(N) Sleep(((N) * 1000)) #endif +#ifdef __OS2__ +#define sleep(N) DosSleep(((N) * 100)) +#endif + +#if defined(unix) +const char *basedir; +#endif /* defined unix */ /* The vanilla wafer. */ static const char VANILLA_WAFER[] = @@ -315,7 +504,7 @@ static const char VANILLA_WAFER[] = * * Description : Once a connection to the client has been accepted, * this function is called (via serve()) to handle the - * main business of the communication. When this + * main business of the communication. When this * function returns, the caller must close the client * socket handle. * @@ -333,40 +522,44 @@ static const char VANILLA_WAFER[] = static void chat(struct client_state *csp) { /* - * This next lines are a little ugly, but they simplifies the if statements below. - * Basically if TOGGLE, then we want the if to test "csp->toggled_on", else we don't - * And if FORCE_LOAD, then we want the if to test "csp->toggled_on", else we don't + * This next lines are a little ugly, but they simplifies the if statements + * below. Basically if TOGGLE, then we want the if to test if the + * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD, + * then we want the if to test for CSP_FLAG_FORCED , else we don't */ -#ifdef TOGGLE -# define IS_TOGGLED_ON_AND (csp->toggled_on) && -#else /* ifndef TOGGLE */ +#ifdef FEATURE_TOGGLE +# define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) && +#else /* ifndef FEATURE_TOGGLE */ # define IS_TOGGLED_ON_AND -#endif /* ndef TOGGLE */ -#ifdef FORCE_LOAD -# define IS_NOT_FORCED_AND (!csp->force) && -#else /* ifndef FORCE_LOAD */ +#endif /* ndef FEATURE_TOGGLE */ +#ifdef FEATURE_FORCE_LOAD +# define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) && +#else /* ifndef FEATURE_FORCE_LOAD */ # define IS_NOT_FORCED_AND -#endif /* def FORCE_LOAD */ +#endif /* def FEATURE_FORCE_LOAD */ #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND char buf[BUFFER_SIZE]; char *hdr, *p, *req; - char *err = NULL; fd_set rfds; int n, maxfd, server_body; int ms_iis5_hack = 0; int byte_count = 0; const struct forward_spec * fwd; struct http_request *http; -#ifdef KILLPOPUPS +#ifdef FEATURE_KILL_POPUPS int block_popups; /* bool, 1==will block popups */ int block_popups_now = 0; /* bool, 1==currently blocking popups */ -#endif /* def KILLPOPUPS */ -#ifdef PCRS - int pcrs_filter; /* bool, 1==will filter through pcrs */ - int filtering = 0; /* bool, 1==currently filtering through pcrs */ -#endif /* def PCRS */ +#endif /* def FEATURE_KILL_POPUPS */ + + int pcrs_filter; /* bool, 1==will filter through pcrs */ + int gif_deanimate; /* bool, 1==will deanimate gifs */ + + /* Function that does the content filtering for the current request */ + char *(*content_filter)() = NULL; + + /* Skeleton for HTTP response, if we should intercept the request */ struct http_response *rsp; http = csp->http; @@ -395,8 +588,8 @@ static void chat(struct client_state *csp) { continue; /* more to come! */ } - -#ifdef FORCE_LOAD + +#ifdef FEATURE_FORCE_LOAD /* If this request contains the FORCE_PREFIX, * better get rid of it now and set the force flag --oes */ @@ -405,14 +598,11 @@ static void chat(struct client_state *csp) { strclean(req, FORCE_PREFIX); log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req); - csp->force = 1; - } - else - { - csp->force = 0; + csp->flags |= CSP_FLAG_FORCED; } -#endif /* def FORCE_LOAD */ - + +#endif /* def FEATURE_FORCE_LOAD */ + parse_http_request(req, http, csp); freez(req); break; @@ -440,84 +630,136 @@ static void chat(struct client_state *csp) * we have to do one of the following: * * create = use the original HTTP request to create a new - * HTTP request that has only the path component - * without the http://domainspec - * pass = pass the original HTTP request unchanged + * HTTP request that has either the path component + * without the http://domainspec (w/path) or the + * full orininal URL (w/url) + * Note that the path and/or the HTTP version may + * have been altered by now. + * + * connect = Open a socket to the host:port of the server + * and short-circuit server and client socket. * - * drop = drop the HTTP request + * pass = Pass the request unchanged if forwarding a CONNECT + * request to a parent proxy. Note that we'll be sending + * the CFAIL message ourselves if connecting to the parent + * fails, but we won't send a CSUCCEED message if it works, + * since that would result in a double message (ours and the + * parent's). After sending the request to the parent, we simply + * tunnel. * * here's the matrix: * SSL * 0 1 * +--------+--------+ * | | | - * 0 | create | drop | - * | | | + * 0 | create | connect| + * | w/path | | * Forwarding +--------+--------+ * | | | - * 1 | pass | pass | - * | | | + * 1 | create | pass | + * | w/url | | * +--------+--------+ * */ - if (fwd->forward_host) + /* + * Determine the actions for this URL + */ +#ifdef FEATURE_TOGGLE + if (!(csp->flags & CSP_FLAG_TOGGLED_ON)) { - /* if forwarding, just pass the request as is */ - enlist(csp->headers, http->cmd); + /* Most compatible set of actions (i.e. none) */ + init_current_action(csp->action); } else +#endif /* ndef FEATURE_TOGGLE */ + { + url_actions(http, 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 == 0) + 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)) ) { - /* otherwise elide the host information from the url */ - p = NULL; - p = strsav(p, http->gpc); - p = strsav(p, " "); - p = strsav(p, http->path); - p = strsav(p, " "); - p = strsav(p, http->ver); - enlist(csp->headers, p); - freez(p); + 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; } } - /* decide what we're to do with cookies */ -#ifdef TOGGLE - if (!csp->toggled_on) + /* + * Downgrade http version from 1.1 to 1.0 if +downgrade + * action applies + */ + if (!strcmpic(http->ver, "HTTP/1.1") && csp->action->flags & ACTION_DOWNGRADE) { - /* Most compatible set of actions (i.e. none) */ - init_current_action(csp->action); + freez(http->ver); + http->ver = strdup("HTTP/1.0"); } - else -#endif /* ndef TOGGLE */ + + /* + * (Re)build the HTTP request for non-SSL requests. + * If forwarding, use the whole URL, else, use only the path. + */ + if (http->ssl == 0) { - url_actions(http, csp); + freez(http->cmd); + + http->cmd = strsav(http->cmd, http->gpc); + http->cmd = strsav(http->cmd, " "); + + if (fwd->forward_host) + { + http->cmd = strsav(http->cmd, http->url); + } + else + { + http->cmd = strsav(http->cmd, http->path); + } + + http->cmd = strsav(http->cmd, " "); + http->cmd = strsav(http->cmd, http->ver); + } + enlist(csp->headers, http->cmd); + -#ifdef JAR_FILES +#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 ((csp->config->jarfile != NULL) - && (csp->action->multi[ACTION_MULTI_WAFER]->next == NULL) + && 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 JAR_FILES */ +#endif /* def FEATURE_COOKIE_JAR */ -#ifdef KILLPOPUPS + +#ifdef FEATURE_KILL_POPUPS block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0); -#endif /* def KILLPOPUPS */ -#ifdef PCRS +#endif /* def FEATURE_KILL_POPUPS */ + pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */ ((csp->action->flags & ACTION_FILTER) != 0); -#endif /* def PCRS */ + gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0); /* grab the rest of the client's headers */ @@ -540,59 +782,52 @@ static void chat(struct client_state *csp) enlist(csp->headers, p); freez(p); } - - /* We have a request. */ - - hdr = sed(client_patterns, add_client_headers, csp); - destroy_list(csp->headers); - - /* - * Now, check to see if we need to intercept it, i.e. - * If + /* + * 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))) + (NULL != (rsp = dispatch_cgi(csp))) /* or we are enabled and... */ || (IS_ENABLED_AND ( /* ..the request was blocked */ - ( NULL != (rsp = block_url(csp))) + ( NULL != (rsp = block_url(csp))) /* ..or untrusted */ -#ifdef TRUST_FILES +#ifdef FEATURE_TRUST || ( NULL != (rsp = trust_url(csp))) -#endif +#endif /* def FEATURE_TRUST */ /* ..or a fast redirect kicked in */ -#ifdef FAST_REDIRECTS - || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) && - (NULL != (rsp = redirect_url(csp)))) -#endif /* def FAST_REDIRECTS */ - )) - ) +#ifdef FEATURE_FAST_REDIRECTS + || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) && + (NULL != (rsp = redirect_url(csp)))) +#endif /* def FEATURE_FAST_REDIRECTS */ + )) + ) { /* Write the answer to the client */ if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length) - || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length)) - { + || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length)) + { log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host); } -#ifdef STATISTICS +#ifdef FEATURE_STATISTICS /* Count as a rejected request */ - csp->rejected = 1; -#endif /* def STATISTICS */ + csp->flags |= CSP_FLAG_REJECTED; +#endif /* def FEATURE_STATISTICS */ /* Log (FIXME: All intercept reasons apprear 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->cmd); + log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->cmd); /* Clean up and return */ free_http_response(rsp); - freez(hdr); return; } @@ -619,36 +854,38 @@ static void chat(struct client_state *csp) if (errno == EINVAL) { - rsp = error_response(csp, "no-such-domain", errno); + rsp = error_response(csp, "no-such-domain", errno); - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0", + log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0", csp->ip_addr_str, http->cmd); } else { - rsp = error_response(csp, "connect-failed", errno); + rsp = error_response(csp, "connect-failed", errno); - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0", + log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0", csp->ip_addr_str, http->cmd); } /* Write the answer to the client */ if(rsp) - { + { if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length) - || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length)) - { + || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length)) + { log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host); } } free_http_response(rsp); - freez(hdr); return; } log_error(LOG_LEVEL_CONNECT, "OK"); + hdr = sed(client_patterns, add_client_headers, csp); + list_remove_all(csp->headers); + if (fwd->forward_host || (http->ssl == 0)) { /* write the client's (modified) header to the server @@ -663,16 +900,16 @@ static void chat(struct client_state *csp) log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E", http->hostport); - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0", - csp->ip_addr_str, http->cmd); + log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0", + csp->ip_addr_str, http->cmd); rsp = error_response(csp, "connect-failed", errno); if(rsp) { if ((write_socket(csp->cfd, rsp->head, n) != n) - || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length)) - { + || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length)) + { log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host); } } @@ -689,8 +926,8 @@ static void chat(struct client_state *csp) * so just send the "connect succeeded" message to the * client, flush the rest, and get out of the way. */ - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n", - csp->ip_addr_str, http->cmd); + log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n", + csp->ip_addr_str, http->cmd); if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1) < 0) { @@ -750,7 +987,7 @@ static void chat(struct client_state *csp) /* * The server wants to talk. It could be the header or the body. * If `hdr' is null, then it's the header otherwise it's the body. - * FIXME: Does `hdr' really mean `host'? + * FIXME: Does `hdr' really mean `host'? No. */ @@ -763,19 +1000,19 @@ static void chat(struct client_state *csp) { log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host); - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0", - csp->ip_addr_str, http->cmd); + log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0", + csp->ip_addr_str, http->cmd); rsp = error_response(csp, "connect-failed", errno); if(rsp) { if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length) - || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length)) - { + || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length)) + { log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host); - } - } + } + } free_http_response(rsp); return; @@ -786,13 +1023,13 @@ static void chat(struct client_state *csp) */ buf[n] = '\0'; -#ifdef KILLPOPUPS +#ifdef FEATURE_KILL_POPUPS /* Filter the popups on this read. */ if (block_popups_now) { - filter_popups(buf, n); + filter_popups(buf, csp); } -#endif /* def KILLPOPUPS */ +#endif /* def FEATURE_KILL_POPUPS */ /* Normally, this would indicate that we've read * as much as the server has sent us and we can @@ -814,29 +1051,49 @@ static void chat(struct client_state *csp) */ if (n == 0) { - /* This hack must only be enforced for headers. */ + if (server_body || http->ssl) { -#ifdef PCRS - if (filtering) + /* + * If we have been buffering up the document, + * now is the time to apply content modification + * and send the result to the client. + */ + if (content_filter) { - p = re_process_buffer(csp); + /* + * 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))) + { + csp->content_length = csp->iob->eod - csp->iob->cur; + } + hdr = sed(server_patterns, add_server_headers, csp); n = strlen(hdr); + if ((write_socket(csp->cfd, hdr, n) != n) - || (write_socket(csp->cfd, p, csp->content_length) != csp->content_length)) + || (write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length) != (int)csp->content_length)) { - log_error(LOG_LEVEL_CONNECT, "write modified content to client failed: %E"); + log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E"); return; } - freez(hdr); - freez(p); + + freez(hdr); + if (NULL != p) { + freez(p); + } } -#endif /* def PCRS */ + break; /* "game over, man" */ } - /* Let's pretend the server just sent us a blank line. */ + /* + * This is NOT the body, so + * Let's pretend the server just sent us a blank line. + */ n = sprintf(buf, "\r\n"); /* @@ -849,20 +1106,48 @@ static void chat(struct client_state *csp) /* * If this is an SSL connection or we're in the body - * of the server document, just write it to the client. + * of the server document, just write it to the client, + * unless we need to buffer the body for later content-filtering */ if (server_body || http->ssl) { -#ifdef PCRS - if (filtering) + if (content_filter) { - add_to_iob(csp, buf, n); /* Buffer the body for filtering */ + add_to_iob(csp, buf, n); + + /* + * 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 (((size_t)(csp->iob->eod - csp->iob->buf)) + (size_t)BUFFER_SIZE > csp->config->buffer_limit) + { + log_error(LOG_LEVEL_ERROR, "Buffer size limit reached! Flushing and stepping back."); + + hdr = sed(server_patterns, add_server_headers, csp); + n = strlen(hdr); + byte_count += n; + + if (((write_socket(csp->cfd, hdr, n) != n) + || (n = flush_socket(csp->cfd, csp) < 0))) + { + log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E"); + + freez(hdr); + return; + } + + freez(hdr); + byte_count += n; + + content_filter = NULL; + server_body = 1; + + } } else -#endif /* def PCRS */ { - /* just write */ if (write_socket(csp->cfd, buf, n) != n) { log_error(LOG_LEVEL_ERROR, "write to client failed: %E"); @@ -936,39 +1221,46 @@ static void chat(struct client_state *csp) * may be in the buffer) */ -#ifdef KILLPOPUPS +#ifdef FEATURE_KILL_POPUPS /* Start blocking popups if appropriate. */ - if (csp->is_text && /* It's a text / * MIME-Type */ - !http->ssl && /* We talk plaintext */ - block_popups) /* Policy allows */ + if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */ + !http->ssl && /* We talk plaintext */ + block_popups) /* 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 KILLPOPUPS */ +#endif /* def FEATURE_KILL_POPUPS */ -#ifdef PCRS - /* Start re_filtering this if appropriate. */ + /* Buffer and pcrs filter this if appropriate. */ - if (csp->is_text && /* It's a text / * MIME-Type */ - !http->ssl && /* We talk plaintext */ - pcrs_filter) /* Policy allows */ + if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */ + !http->ssl && /* We talk plaintext */ + pcrs_filter) /* Policy allows */ { - filtering = 1; + content_filter = pcrs_filter_response; } -/* This next line is a little ugly, but it simplifies the if statement below. */ -/* Basically if using PCRS, we want the OR condition to require "!filtering" */ -#define NOT_FILTERING_AND !filtering && - -#else /* not def PCRS */ + /* Buffer and gif_deanimate this if appropriate. */ -#define NOT_FILTERING_AND + if ((csp->content_type & CT_GIF) && /* It's a image/gif MIME-Type */ + !http->ssl && /* We talk plaintext */ + gif_deanimate) /* Policy allows */ + { + content_filter = gif_deanimate_response; + } -#endif /* def PCRS */ - if (NOT_FILTERING_AND ((write_socket(csp->cfd, hdr, n) != n) + /* + * Only write if we're not buffering for content modification + */ + if (!content_filter && ((write_socket(csp->cfd, hdr, n) != n) || (n = flush_socket(csp->cfd, csp) < 0))) { log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E"); @@ -981,7 +1273,7 @@ static void chat(struct client_state *csp) return; } - NOT_FILTERING_AND (byte_count += n); + if(!content_filter) byte_count += n; /* we're finished with the server's header */ @@ -1004,8 +1296,8 @@ static void chat(struct client_state *csp) return; /* huh? we should never get here */ } - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d", - csp->ip_addr_str, http->cmd, byte_count); + log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d", + csp->ip_addr_str, http->cmd, byte_count); } @@ -1036,7 +1328,7 @@ static void serve(struct client_state *csp) close_socket(csp->sfd); } - csp->active = 0; + csp->flags &= ~CSP_FLAG_ACTIVE; } @@ -1082,23 +1374,25 @@ static int32 server_thread(void *data) * any load fails, and can't bind port. * * Else main never returns, the process must be signaled - * to terminate execution. Or, on Windows, use the + * to terminate execution. Or, on Windows, use the * "File", "Exit" menu option. * *********************************************************************/ #ifdef __MINGW32__ -int _main(int argc, const char *argv[]) +int real_main(int argc, const char *argv[]) #else int main(int argc, const char *argv[]) #endif { + int argc_pos = 1; + configfile = #ifdef AMIGA "AmiTCP:db/junkbuster/config" #elif !defined(_WIN32) "config" #else - "junkbstr.txt" + "config.txt" #endif ; @@ -1117,16 +1411,52 @@ int main(int argc, const char *argv[]) printf(VERSION "\n"); exit(2); } +#ifdef _DEBUG + if ((argc >= 2) && (strcmp(argv[1], "-d")==0)) + { + ldebug++; + argc_pos++; + fprintf(stderr,"debugging enabled..\n"); + } +#endif /* _DEBUG */ #endif /* !defined(_WIN32) || defined(_WIN_CONSOLE) */ Argc = argc; Argv = argv; - if (argc > 1) + if (argc > argc_pos ) { - configfile = argv[1]; + configfile = argv[argc_pos]; } +#if defined(unix) + if ( *configfile != '/' ) + { + char *abs_file; + + DBG(1, ("configfile before '%s'\n",configfile) ); + + /* make config-filename absolute here */ + if ( !(basedir = getcwd( NULL, 1024 ))) + { + perror("get working dir failed"); + exit( 1 ); + } + DBG(1, ("working dir '%s'\n",basedir) ); + if ( !(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))) + { + perror("malloc failed"); + exit( 1 ); + } + strcpy( abs_file, basedir ); + strcat( abs_file, "/" ); + strcat( abs_file, configfile ); + configfile = abs_file; + DBG(1, ("configfile after '%s'\n",configfile) ); + } +#endif /* defined unix */ + + files->next = NULL; #ifdef AMIGA @@ -1136,7 +1466,7 @@ int main(int argc, const char *argv[]) #endif -#ifndef _WIN32 +#if !defined(_WIN32) && !defined(__OS2__) signal(SIGPIPE, SIG_IGN); signal(SIGCHLD, SIG_IGN); @@ -1151,6 +1481,82 @@ int main(int argc, const char *argv[]) #endif /* def _WIN32 */ + /* Initialize the CGI subsystem */ + cgi_init_error_messages(); + +#if defined(unix) +{ + pid_t pid = 0; +#if 0 + int fd; +#endif + + /* + * we make us a real daemon + */ +#ifdef _DEBUG + if ( !ldebug) +#endif + pid = fork(); + if ( pid < 0 ) /* error */ + { + perror("fork"); + exit( 3 ); + } + else if ( pid != 0 ) /* parent */ + { + int status; + pid_t wpid; + /* + * must check for errors + * child died due to missing files aso + */ + sleep( 1 ); + wpid = waitpid( pid, &status, WNOHANG ); + if ( wpid != 0 ) + { + exit( 1 ); + } + exit( 0 ); + } + /* child */ +#if 1 + /* Should be more portable, but not as well tested */ + setsid(); +#else /* !1 */ +#ifdef __FreeBSD__ + setpgrp(0,0); +#else /* ndef __FreeBSD__ */ + setpgrp(); +#endif /* ndef __FreeBSD__ */ + fd = open("/dev/tty", O_RDONLY); + if ( fd ) + { + /* no error check here */ + ioctl( fd, TIOCNOTTY,0 ); + close ( fd ); + } +#endif /* !1 */ + /* 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. + */ +#ifdef _DEBUG + if ( !ldebug ) + { + close( 0 ); + close( 1 ); + } +#else + close( 0 ); + close( 1 ); +#endif /* _DEBUG */ + chdir("/"); + +} +#endif /* defined unix */ + + DBG(1, ("call listen_loop() \n") ); listen_loop(); /* NOTREACHED */ @@ -1187,8 +1593,8 @@ static void listen_loop(void) { log_error(LOG_LEVEL_FATAL, "can't bind %s:%d: %E " "- There may be another junkbuster or some other " - "proxy running on port %d", - (NULL != config->haddr) ? config->haddr : "INADDR_ANY", + "proxy running on port %d", + (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport, config->hport ); /* shouldn't get here */ @@ -1197,15 +1603,14 @@ static void listen_loop(void) config->need_bind = 0; - while (FOREVER) { -#if !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) +#if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__) while (waitpid(-1, NULL, WNOHANG) > 0) { /* zombie children */ } -#endif /* !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */ +#endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */ sweep(); if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) ) @@ -1214,9 +1619,7 @@ static void listen_loop(void) continue; } - memset(csp, '\0', sizeof(*csp)); - - csp->active = 1; + csp->flags |= CSP_FLAG_ACTIVE; csp->sfd = -1; csp->config = config = load_config(); @@ -1246,8 +1649,8 @@ static void listen_loop(void) { log_error(LOG_LEVEL_FATAL, "can't bind %s:%d: %E " "- There may be another junkbuster or some other " - "proxy running on port %d", - (NULL != config->haddr) ? config->haddr : "INADDR_ANY", + "proxy running on port %d", + (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport, config->hport ); /* shouldn't get here */ @@ -1266,7 +1669,7 @@ static void listen_loop(void) #ifdef AMIGA if(!childs) { - exit(1); + exit(1); } #endif freez(csp); @@ -1277,10 +1680,12 @@ static void listen_loop(void) log_error(LOG_LEVEL_CONNECT, "OK"); } -#if defined(TOGGLE) - /* by haroon - most of credit to srt19170 */ - csp->toggled_on = g_bToggleIJB; -#endif +#ifdef FEATURE_TOGGLE + if (g_bToggleIJB) + { + csp->flags |= CSP_FLAG_TOGGLED_ON; + } +#endif /* def FEATURE_TOGGLE */ if (run_loader(csp)) { @@ -1288,7 +1693,7 @@ static void listen_loop(void) /* Never get here - LOG_LEVEL_FATAL causes program exit */ } -#ifdef ACL_FILES +#ifdef FEATURE_ACL if (block_acl(NULL,csp)) { log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL"); @@ -1296,7 +1701,7 @@ static void listen_loop(void) freez(csp); continue; } -#endif /* def ACL_FILES */ +#endif /* def FEATURE_ACL */ /* add it to the list of clients */ csp->next = clients->next; @@ -1309,6 +1714,21 @@ static void listen_loop(void) /* this is a switch () statment in the C preprocessor - ugh */ #undef SELECTED_ONE_OPTION +/* Use Pthreads in preference to native code */ +#if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION) +#define SELECTED_ONE_OPTION + { + pthread_t the_thread; + pthread_attr_t attrs; + + pthread_attr_init(&attrs); + pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED); + child_id = (pthread_create(&the_thread, &attrs, + (void*)serve, csp) ? -1 : 0); + pthread_attr_destroy(&attrs); + } +#endif + #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION) #define SELECTED_ONE_OPTION child_id = _beginthread( @@ -1317,6 +1737,15 @@ static void listen_loop(void) csp); #endif +#if defined(__OS2__) && !defined(SELECTED_ONE_OPTION) +#define SELECTED_ONE_OPTION + child_id = _beginthread( + serve, + NULL, + 64 * 1024, + csp); +#endif + #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION) #define SELECTED_ONE_OPTION { @@ -1354,27 +1783,7 @@ static void listen_loop(void) #if !defined(SELECTED_ONE_OPTION) child_id = fork(); -#endif - -#undef SELECTED_ONE_OPTION -/* end of cpp switch () */ - if (child_id < 0) /* failed */ - { - char buf[BUFFER_SIZE]; - - log_error(LOG_LEVEL_ERROR, "can't fork: %E"); - - sprintf(buf , "JunkBuster: can't fork: errno = %d", errno); - - write_socket(csp->cfd, buf, strlen(buf)); - close_socket(csp->cfd); - csp->active = 0; - sleep(5); - continue; - } - -#if !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) /* This block is only needed when using fork(). * When using threads, the server thread was * created and run by the call to _beginthread(). @@ -1385,7 +1794,7 @@ static void listen_loop(void) _exit(0); } - else /* parent */ + else if (child_id > 0) /* parent */ { /* in a fork()'d environment, the parent's * copy of the client socket and the CSP @@ -1396,9 +1805,27 @@ static void listen_loop(void) wait( NULL ); #endif /* !defined(_WIN32) && defined(__CYGWIN__) */ close_socket(csp->cfd); - csp->active = 0; + csp->flags &= ~CSP_FLAG_ACTIVE; + } +#endif + +#undef SELECTED_ONE_OPTION +/* end of cpp switch () */ + + if (child_id < 0) /* failed */ + { + char buf[BUFFER_SIZE]; + + log_error(LOG_LEVEL_ERROR, "can't fork: %E"); + + sprintf(buf , "JunkBuster: can't fork: errno = %d", errno); + + write_socket(csp->cfd, buf, strlen(buf)); + close_socket(csp->cfd); + csp->flags &= ~CSP_FLAG_ACTIVE; + sleep(5); + continue; } -#endif /* !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */ } else {