-const char jcc_rcs[] = "$Id: jcc.c,v 1.58 2001/11/30 23:37:24 jongfoster Exp $";
+const char jcc_rcs[] = "$Id: jcc.c,v 1.232 2009/03/08 19:29:16 fabiankeil Exp $";
/*********************************************************************
*
* File : $Source: /cvsroot/ijbswa/current/jcc.c,v $
* 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
+ * Copyright : Written by and Copyright (C) 2001-2009 the SourceForge
+ * Privoxy team. http://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
* by and Copyright (C) 1997 Anonymous Coders and
*
* Revisions :
* $Log: jcc.c,v $
+ * Revision 1.232 2009/03/08 19:29:16 fabiankeil
+ * Reinitialize the timeout structure every time before passing
+ * it to select(). Apparently some implementations mess with it.
+ * Probably fixes #2669131 reported by cyberpatrol.
+ *
+ * Revision 1.231 2009/03/08 14:19:23 fabiankeil
+ * Fix justified (but harmless) compiler warnings
+ * on platforms where sizeof(int) < sizeof(long).
+ *
+ * Revision 1.230 2009/03/07 13:09:17 fabiankeil
+ * Change csp->expected_content and_csp->expected_content_length from
+ * size_t to unsigned long long to reduce the likelihood of integer
+ * overflows that would let us close the connection prematurely.
+ * Bug found while investigating #2669131, reported by cyberpatrol.
+ *
+ * Revision 1.229 2009/03/07 11:17:01 fabiankeil
+ * Fix compiler warning.
+ *
+ * Revision 1.228 2009/03/06 20:30:13 fabiankeil
+ * Log unsigned values as such.
+ *
+ * Revision 1.227 2009/03/02 19:18:11 fabiankeil
+ * Streamline parse_http_request()'s prototype. As
+ * cparser pointed out it doesn't actually use csp.
+ *
+ * Revision 1.226 2009/03/01 18:28:24 fabiankeil
+ * Help clang understand that we aren't dereferencing
+ * NULL pointers here.
+ *
+ * Revision 1.225 2009/02/19 18:09:32 fabiankeil
+ * Unbreak build without FEATURE_CONNECTION_KEEP_ALIVE.
+ * Noticed by David.
+ *
+ * Revision 1.224 2009/02/14 15:32:04 fabiankeil
+ * Add the request URL to the timeout message in chat().
+ * Suggested by Lee.
+ *
+ * Revision 1.223 2009/02/09 21:21:16 fabiankeil
+ * Now that init_log_module() is called earlier, call show_version()
+ * later on from main() directly so it doesn't get called for --help
+ * or --version.
+ *
+ * Revision 1.222 2009/02/08 12:56:51 fabiankeil
+ * Call initialize_mutexes() before init_log_module() again.
+ * Broken since r220, might be the cause of Lee's #2579448.
+ *
+ * Revision 1.221 2009/02/06 18:02:58 fabiankeil
+ * When dropping privileges, also give up membership in supplementary
+ * groups. Thanks to Matthias Drochner for reporting the problem,
+ * providing the initial patch and testing the final version.
+ *
+ * Revision 1.220 2009/02/04 18:29:07 fabiankeil
+ * Initialize the log module before parsing arguments.
+ * Thanks to Matthias Drochner for the report.
+ *
+ * Revision 1.219 2009/01/31 16:08:21 fabiankeil
+ * Remove redundant error check in receive_client_request().
+ *
+ * Revision 1.218 2009/01/31 12:25:54 fabiankeil
+ * Flatten indentation in receive_client_request().
+ *
+ * Revision 1.217 2009/01/07 19:50:09 fabiankeil
+ * - If the socket-timeout has been reached and the client
+ * hasn't received any data yet, send an explanation before
+ * closing the connection.
+ * - In get_request_line(), signal timeouts the right way.
+ *
+ * Revision 1.216 2008/12/24 22:13:11 ler762
+ * fix GCC 3.4.4 warning
+ *
+ * Revision 1.215 2008/12/24 17:06:19 fabiankeil
+ * Keep a thread around to timeout alive connections
+ * even if no new requests are coming in.
+ *
+ * Revision 1.214 2008/12/20 14:53:55 fabiankeil
+ * Add config option socket-timeout to control the time
+ * Privoxy waits for data to arrive on a socket. Useful
+ * in case of stale ssh tunnels or when fuzz-testing.
+ *
+ * Revision 1.213 2008/12/15 18:45:51 fabiankeil
+ * When logging crunches, log the whole URL, so one can easily
+ * differentiate between vanilla HTTP and CONNECT requests.
+ *
+ * Revision 1.212 2008/12/14 15:46:22 fabiankeil
+ * Give crunched requests their own log level.
+ *
+ * Revision 1.211 2008/12/06 10:05:03 fabiankeil
+ * Downgrade "Received x bytes while expecting y." message to
+ * LOG_LEVEL_CONNECT as it doesn't necessarily indicate an error.
+ *
+ * Revision 1.210 2008/12/02 22:03:18 fabiankeil
+ * Don't miscalculate byte_count if we don't get all the
+ * server headers with one read_socket() call. With keep-alive
+ * support enabled, this caused delays until the server closed
+ * the connection.
+ *
+ * Revision 1.209 2008/11/27 09:44:04 fabiankeil
+ * Cosmetics for the last commit: Don't watch out for
+ * the last chunk if the content isn't chunk-encoded or
+ * if we already determined the content length previously.
+ *
+ * Revision 1.208 2008/11/26 18:24:17 fabiankeil
+ * Recognize that the server response is complete if the
+ * last chunk is read together with the server headers.
+ * Reported by Lee.
+ *
+ * Revision 1.207 2008/11/25 17:25:16 fabiankeil
+ * Don't convert the client-header list to text until we need to.
+ *
+ * Revision 1.206 2008/11/23 17:00:11 fabiankeil
+ * Some more chat() cosmetics.
+ *
+ * Revision 1.205 2008/11/16 12:43:49 fabiankeil
+ * Turn keep-alive support into a runtime feature
+ * that is disabled by setting keep-alive-timeout
+ * to a negative value.
+ *
+ * Revision 1.204 2008/11/06 19:42:17 fabiankeil
+ * Fix last-chunk detection hack to also apply
+ * if buf[] contains nothing but the last-chunk.
+ *
+ * Revision 1.203 2008/11/06 18:34:35 fabiankeil
+ * Factor receive_client_request() and
+ * parse_client_request() out of chat().
+ *
+ * Revision 1.202 2008/11/02 18:40:34 fabiankeil
+ * If we received a different amount of data than we expected,
+ * log a warning and make sure the server socket isn't reused.
+ *
+ * Revision 1.201 2008/11/02 16:48:20 fabiankeil
+ * Revert revision 1.195 and try again.
+ *
+ * Revision 1.200 2008/10/26 16:53:18 fabiankeil
+ * Fix gcc44 warning.
+ *
+ * Revision 1.199 2008/10/26 15:36:10 fabiankeil
+ * Remove two debug messages with LOG_LEVEL_INFO.
+ *
+ * Revision 1.198 2008/10/22 15:19:55 fabiankeil
+ * Once More, With Feeling: if there is no logfile
+ * because the user didn't specify one, we shouldn't
+ * call init_error_log() after receiving SIGHUP either.
+ *
+ * Revision 1.197 2008/10/20 17:02:40 fabiankeil
+ * If SIGHUP is received while we aren't running in daemon
+ * mode, calling init_error_log() would be a mistake.
+ *
+ * Revision 1.196 2008/10/16 09:16:41 fabiankeil
+ * - Fix two gcc44 conversion warnings.
+ * - Don't bother logging the last five bytes
+ * of the 0-chunk.
+ *
+ * Revision 1.195 2008/10/13 16:04:37 fabiankeil
+ * Make sure we don't try to reuse tainted server sockets.
+ *
+ * Revision 1.194 2008/10/12 18:35:18 fabiankeil
+ * The last commit was a bit too ambitious, apparently the content
+ * length adjustment is only necessary if we aren't buffering.
+ *
+ * Revision 1.193 2008/10/12 15:57:35 fabiankeil
+ * Fix content length calculation if we read headers
+ * and the start of the body at once. Now that we have
+ * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
+ *
+ * Revision 1.192 2008/10/11 18:19:14 fabiankeil
+ * Even more chat() cosmetics.
+ *
+ * Revision 1.191 2008/10/11 18:00:14 fabiankeil
+ * Reformat some comments in chat().
+ *
+ * Revision 1.190 2008/10/11 14:58:00 fabiankeil
+ * In case of chunk-encoded content, stop reading if
+ * the buffer looks like it ends with the last chunk.
+ *
+ * Revision 1.189 2008/10/11 09:53:00 fabiankeil
+ * Let server_response_is_complete() deal properly with
+ * content that is neither buffered nor read all at once.
+ *
+ * Revision 1.188 2008/10/09 18:21:41 fabiankeil
+ * Flush work-in-progress changes to keep outgoing connections
+ * alive where possible. Incomplete and mostly #ifdef'd out.
+ *
+ * Revision 1.187 2008/09/07 12:35:05 fabiankeil
+ * Add mutex lock support for _WIN32.
+ *
+ * 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.
+ *
+ * Revision 1.145 2007/08/19 13:13:31 fabiankeil
+ * - If there's a connection problem after we already forwarded
+ * parts of the original content, just hang up. Fixes BR#1776724.
+ * - Fix warnings about unused code on mingw32.
+ * - In case of flushes, calculate the byte count
+ * less incorrectly (I think).
+ *
+ * Revision 1.144 2007/08/11 14:43:22 fabiankeil
+ * Add some more prototypes for static functions.
+ *
+ * Revision 1.143 2007/08/05 13:58:19 fabiankeil
+ * Comment out request_contains_null_bytes() until it's used again.
+ *
+ * Revision 1.142 2007/08/05 13:50:26 fabiankeil
+ * #1763173 from Stefan Huehner: s@const static@static const@
+ * and declare some more functions static.
+ *
+ * Revision 1.141 2007/08/04 09:56:23 fabiankeil
+ * - Log rejected CONNECT requests with LOG_LEVEL_INFO
+ * and explain why they were rejected in the first place.
+ * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
+ * CONNECT requests. The request line was missing.
+ * - Add two more XXX reminders as we don't have enough already.
+ *
+ * Revision 1.140 2007/07/21 11:51:36 fabiankeil
+ * As Hal noticed, checking dispatch_cgi() as the last cruncher
+ * looks like a bug if CGI requests are blocked unintentionally,
+ * so don't do it unless the user enabled the new config option
+ * "allow-cgi-request-crunching".
+ *
+ * Revision 1.139 2007/07/14 07:46:41 fabiankeil
+ * - Allow to rewrite the request destination behind the client's back.
+ * - Turn the weird-looking unconditional for loop that
+ * reads the client request into a conditional while loop.
+ * Move the stuff that only runs once out of the loop.
+ * - Move parts of chat(), server_content_type() and the
+ * necessary stuff to fix BR#1750917 into get_filter_function().
+ *
+ * Revision 1.138 2007/06/03 18:45:18 fabiankeil
+ * Temporary workaround for BR#1730105.
+ *
+ * Revision 1.137 2007/06/01 18:16:36 fabiankeil
+ * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
+ * deadlocks and crashes on OpenBSD and possibly other OS with neither
+ * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
+ * Thanks to Ralf Horstmann for report and solution.
+ *
+ * Revision 1.136 2007/06/01 16:41:11 fabiankeil
+ * Add forward-override{} to change the forwarding settings through
+ * action sections. This is mainly interesting to forward different
+ * clients differently (for example based on User-Agent or request
+ * origin).
+ *
+ * Revision 1.135 2007/05/24 17:03:50 fabiankeil
+ * - Let usage() mention the --chroot parameter.
+ * - Use read_socket() consistently and always leave
+ * the last buffer byte alone, even in cases where
+ * null termination (currently) doesn't matter.
+ *
+ * Revision 1.134 2007/05/16 14:59:46 fabiankeil
+ * - Fix config file loading on Unix if no config file is specified.
+ * Since r1.97 Privoxy would always interpret the last argument as
+ * config file, even if it's a valid command line option.
+ * - Abort in case of unrecognized command line options. Closes #1719696.
+ * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
+ * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
+ *
+ * Revision 1.133 2007/05/04 11:23:19 fabiankeil
+ * - Don't rerun crunchers that only depend on the request URL.
+ * - Don't count redirects and CGI requests as "blocked requests".
+ *
+ * Revision 1.132 2007/04/25 15:15:17 fabiankeil
+ * Support crunching based on tags created by server-header taggers.
+ *
+ * Revision 1.131 2007/04/22 13:24:50 fabiankeil
+ * Make HTTP snippets static (again). Add a Content-Type for those
+ * with content so the browser doesn't guess it based on the URL.
+ *
+ * Revision 1.130 2007/04/19 13:47:34 fabiankeil
+ * Move crunching and request line rebuilding out of chat().
+ *
+ * Revision 1.129 2007/04/15 16:39:20 fabiankeil
+ * Introduce tags as alternative way to specify which
+ * actions apply to a request. At the moment tags can be
+ * created based on client and server headers.
+ *
+ * Revision 1.128 2007/03/25 16:55:54 fabiankeil
+ * Don't CLF-log CONNECT requests twice.
+ *
+ * Revision 1.127 2007/03/20 13:53:17 fabiankeil
+ * Log the source address for ACL-related connection drops.
+ *
+ * Revision 1.126 2007/03/17 15:20:05 fabiankeil
+ * New config option: enforce-blocks.
+ *
+ * Revision 1.125 2007/03/09 14:12:00 fabiankeil
+ * - Move null byte check into separate function.
+ * - Don't confuse the client with error pages
+ * if a CONNECT request was already confirmed.
+ *
+ * Revision 1.124 2007/02/23 14:59:54 fabiankeil
+ * Speed up NULL byte escaping and only log the complete
+ * NULL byte requests with header debugging enabled.
+ *
+ * Revision 1.123 2007/02/21 18:42:10 fabiankeil
+ * Answer requests that contain NULL bytes with
+ * a custom response instead of waiting for more
+ * data until the client eventually hangs up.
+ *
+ * Revision 1.122 2007/02/07 11:12:02 fabiankeil
+ * - Move delivery and logging of crunched responses
+ * from chat() into send_crunch_response().
+ * - Display the reason for generating http_responses.
+ * - Log the content length for LOG_LEVEL_CLF correctly
+ * (still incorrect for some fixed responses).
+ * - Reword an incorrect comment about
+ * treat-forbidden-connects-like-blocks violating
+ * the specs.
+ * - Add some log messages.
+ *
+ * Revision 1.121 2007/01/27 10:52:56 fabiankeil
+ * Move mutex initialization into separate
+ * function and exit in case of errors.
+ *
+ * Revision 1.120 2007/01/26 14:18:42 fabiankeil
+ * - Start to reduce chat()'s line count and move
+ * parts of it into separate functions.
+ * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
+ *
+ * Revision 1.119 2007/01/25 14:02:30 fabiankeil
+ * - Add Proxy-Agent header to HTTP snippets that are
+ * supposed to reach HTTP clients only.
+ * - Made a few CONNECT log messages more descriptive.
+ * - Catch completely empty server responses (as seen
+ * with Tor's fake ".noconnect" top level domain).
+ * - Use shiny new "forwarding-failed" template for socks errors.
+ *
+ * Revision 1.118 2007/01/07 07:43:43 joergs
+ * AmigaOS4 support added.
+ *
+ * Revision 1.117 2006/12/31 17:56:37 fabiankeil
+ * Added config option accept-intercepted-requests
+ * and disabled it by default.
+ *
+ * Revision 1.116 2006/12/29 19:08:22 fabiankeil
+ * Reverted parts of my last commit
+ * to keep error handling working.
+ *
+ * Revision 1.115 2006/12/29 17:38:57 fabiankeil
+ * Fixed gcc43 conversion warnings.
+ *
+ * Revision 1.114 2006/12/27 18:52:02 fabiankeil
+ * Fix -pedantic ISO C warning about converting
+ * from function pointer to object pointer.
+ *
+ * Revision 1.113 2006/12/26 17:38:50 fabiankeil
+ * Silence compiler warning I introduced with my last commit.
+ *
+ * Revision 1.112 2006/12/26 17:31:41 fabiankeil
+ * Mutex protect rand() if POSIX threading
+ * is used, warn the user if that's not possible
+ * and stop using it on _WIN32 where it could
+ * cause crashes.
+ *
+ * Revision 1.111 2006/12/23 16:15:06 fabiankeil
+ * Don't prevent core dumps by catching SIGABRT.
+ * It's rude and makes debugging unreasonable painful.
+ *
+ * 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
+ *
+ * Revision 1.80 2002/03/11 22:07:05 david__schmidt
+ * OS/2 port maintenance:
+ * - Fixed EMX build - it had decayed a little
+ * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
+ * substituted a memset for now.
+ *
+ * Revision 1.79 2002/03/09 20:03:52 jongfoster
+ * - Making various functions return int rather than size_t.
+ * (Undoing a recent change). Since size_t is unsigned on
+ * Windows, functions like read_socket that return -1 on
+ * error cannot return a size_t.
+ *
+ * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
+ * crashes, and also frequently caused JB to jump to 100%
+ * CPU and stay there. (Because it thought it had just
+ * read ((unsigned)-1) == 4Gb of data...)
+ *
+ * - The signature of write_socket has changed, it now simply
+ * returns success=0/failure=nonzero.
+ *
+ * - Trying to get rid of a few warnings --with-debug on
+ * Windows, I've introduced a new type "jb_socket". This is
+ * used for the socket file descriptors. On Windows, this
+ * is SOCKET (a typedef for unsigned). Everywhere else, it's
+ * an int. The error value can't be -1 any more, so it's
+ * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
+ * Windows it maps to the #define INVALID_SOCKET.)
+ *
+ * - The signature of bind_port has changed.
+ *
+ * Revision 1.78 2002/03/08 21:35:04 oes
+ * Added optional group supplement to --user option. Will now use default group of user if no group given
+ *
+ * Revision 1.77 2002/03/07 03:52:06 oes
+ * - Fixed compiler warnings etc
+ * - Improved handling of failed DNS lookups
+ *
+ * Revision 1.76 2002/03/06 22:54:35 jongfoster
+ * Automated function-comment nitpicking.
+ *
+ * Revision 1.75 2002/03/06 10:02:19 oes
+ * Fixed stupid bug when --user was not given
+ *
+ * Revision 1.74 2002/03/06 00:49:31 jongfoster
+ * Fixing warning on Windows
+ * Making #ifdefs that refer to the same variable consistently
+ * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
+ *
+ * Revision 1.73 2002/03/05 23:57:30 hal9
+ * Stray character 's' on line 1618 was breaking build.
+ *
+ * Revision 1.72 2002/03/05 21:33:45 david__schmidt
+ * - Re-enable OS/2 building after new parms were added
+ * - Fix false out of memory report when resolving CGI templates when no IP
+ * address is available of failed attempt (a la no such domain)
+ *
+ * Revision 1.71 2002/03/05 18:13:56 oes
+ * Added --user option
+ *
+ * Revision 1.70 2002/03/05 04:52:42 oes
+ * Deleted non-errlog debugging code
+ *
+ * Revision 1.69 2002/03/04 23:50:00 jongfoster
+ * Splitting off bind_port() call into bind_port_helper(), with
+ * improved logging.
+ *
+ * Revision 1.68 2002/03/04 20:17:32 oes
+ * Fixed usage info
+ *
+ * Revision 1.67 2002/03/04 18:18:57 oes
+ * - Removed _DEBUG mode
+ * - Cleand up cmdline parsing
+ * - Introduced --no-daemon, --pidfile options
+ * - Cleaned up signal handling:
+ * - Terminate cleanly on INT, TERM and ABRT
+ * - Schedule logfile for re-opening on HUP
+ * - Ignore CHLD and PIPE
+ * - Leave the rest with their default handlers
+ * - Uniform handler registration
+ * - Added usage() function
+ * - Played styleguide police
+ *
+ * Revision 1.66 2002/03/03 15:06:55 oes
+ * Re-enabled automatic config reloading
+ *
+ * Revision 1.65 2002/03/03 14:49:11 oes
+ * Fixed CLF logging: Now uses client's original HTTP request
+ *
+ * Revision 1.64 2002/03/03 09:18:03 joergs
+ * Made jumbjuster work on AmigaOS again.
+ *
+ * Revision 1.63 2002/03/02 04:14:50 david__schmidt
+ * Clean up a little CRLF unpleasantness that suddenly appeared
+ *
+ * Revision 1.62 2002/02/20 23:17:23 jongfoster
+ * Detecting some out-of memory conditions and exiting with a log message.
+ *
+ * Revision 1.61 2002/01/17 21:01:52 jongfoster
+ * Moving all our URL and URL pattern parsing code to urlmatch.c.
+ *
+ * Revision 1.60 2001/12/30 14:07:32 steudten
+ * - Add signal handling (unix)
+ * - Add SIGHUP handler (unix)
+ * - Add creation of pidfile (unix)
+ * - Add action 'top' in rc file (RH)
+ * - Add entry 'SIGNALS' to manpage
+ * - Add exit message to logfile (unix)
+ *
+ * Revision 1.59 2001/12/13 14:07:18 oes
+ * Fixed Bug: 503 error page now sent OK
+ *
* Revision 1.58 2001/11/30 23:37:24 jongfoster
* Renaming the Win32 config file to config.txt - this is almost the
* same as the corresponding UNIX name "config"
#include <signal.h>
#include <fcntl.h>
#include <errno.h>
-
-#ifdef FEATURE_PTHREAD
-#include <pthread.h>
-#endif /* def FEATURE_PTHREAD */
+#include <assert.h>
#ifdef _WIN32
# ifndef FEATURE_PTHREAD
+# ifndef STRICT
+# define STRICT
+# endif
# include <windows.h>
# include <process.h>
# endif /* ndef FEATURE_PTHREAD */
# ifndef _WIN_CONSOLE
# include "w32log.h"
# endif /* ndef _WIN_CONSOLE */
+# include "w32svrapi.h"
#else /* ifndef _WIN32 */
#include <sys/termios.h>
#endif /* sun */
+#ifdef unix
+#include <pwd.h>
+#include <grp.h>
+#endif
+
# include <signal.h>
# ifdef __BEOS__
#endif
-#ifdef _DEBUG
-int ldebug = 0;
-#endif
-
#include "project.h"
#include "list.h"
#include "jcc.h"
#include "filters.h"
#include "loaders.h"
#include "parsers.h"
-#include "killpopup.h"
#include "miscutil.h"
#include "errlog.h"
#include "jbsockets.h"
#include "actions.h"
#include "cgi.h"
#include "loadcfg.h"
+#include "urlmatch.h"
const char jcc_h_rcs[] = JCC_H_VERSION;
const char project_h_rcs[] = PROJECT_H_VERSION;
+int no_daemon = 0;
struct client_state clients[1];
struct file_list files[1];
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);
+#if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
+static void sig_handler(int the_signal);
+#endif
+static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
+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(const struct client_state *csp, struct http_response *rsp);
+static char *get_request_line(struct client_state *csp);
+static jb_err receive_client_request(struct client_state *csp);
+static jb_err parse_client_request(struct client_state *csp);
+static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
+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(_WIN32) || defined(_WIN_CONSOLE)
+static void usage(const char *myname);
+#endif
+static void initialize_mutexes(void);
+static jb_socket bind_port_helper(struct configuration_spec *config);
+static void listen_loop(void);
+
#ifdef AMIGA
void serve(struct client_state *csp);
#else /* ifndef AMIGA */
#define sleep(N) DosSleep(((N) * 100))
#endif
+#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;
+privoxy_mutex_t connection_reuse_mutex;
+
+#if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
+privoxy_mutex_t resolver_mutex;
+#endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
+
+#ifndef HAVE_GMTIME_R
+privoxy_mutex_t gmtime_mutex;
+#endif /* ndef HAVE_GMTIME_R */
+
+#ifndef HAVE_LOCALTIME_R
+privoxy_mutex_t localtime_mutex;
+#endif /* ndef HAVE_GMTIME_R */
+
+#ifndef HAVE_RANDOM
+privoxy_mutex_t rand_mutex;
+#endif /* ndef HAVE_RANDOM */
+
+#endif /* def MUTEX_LOCKS_AVAILABLE */
+
#if defined(unix)
-const char *basedir;
+const char *basedir = NULL;
+const char *pidfile = NULL;
+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\r\n"
+ "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
+
+static const char CHEADER[] =
+ "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 client.\r\n";
+
+static const char FTP_RESPONSE[] =
+ "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 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 client\r\n"
+ "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "Content-Type: text/plain\r\n"
+ "Connection: close\r\n\r\n"
+ "Bad request. Privoxy was unable to extract the destination.\r\n";
+
+/* XXX: should be a template */
+static const char NO_SERVER_DATA_RESPONSE[] =
+ "HTTP/1.0 502 Server or forwarder response empty\r\n"
+ "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "Content-Type: text/plain\r\n"
+ "Connection: close\r\n\r\n"
+ "Empty server or forwarder response.\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 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[] =
+ "HTTP/1.0 400 Malformed request after rewriting\r\n"
+ "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "Content-Type: text/plain\r\n"
+ "Connection: close\r\n\r\n"
+ "Bad request. Messed up with header filters.\r\n";
+
+/* XXX: should be a template */
+static const char CONNECTION_TIMEOUT_RESPONSE[] =
+ "HTTP/1.0 502 Connection timeout\r\n"
+ "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "Content-Type: text/plain\r\n"
+ "Connection: close\r\n\r\n"
+ "The connection timed out.\r\n";
+
+/* A function to crunch a response */
+typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
+
+/* Crunch function flags */
+#define CF_NO_FLAGS 0
+/* Cruncher applies to forced requests as well */
+#define CF_IGNORE_FORCE 1
+/* Crunched requests are counted for the block statistics */
+#define CF_COUNT_AS_REJECT 2
+
+/* A crunch function and its flags */
+struct cruncher
+{
+ const crunch_func_ptr cruncher;
+ const int flags;
+};
+
+static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
+
+/* Complete list of cruncher functions */
+static const struct cruncher crunchers_all[] = {
+ { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
+ { block_url, CF_COUNT_AS_REJECT },
+#ifdef FEATURE_TRUST
+ { trust_url, CF_COUNT_AS_REJECT },
+#endif /* def FEATURE_TRUST */
+ { redirect_url, CF_NO_FLAGS },
+ { dispatch_cgi, CF_IGNORE_FORCE},
+ { NULL, 0 }
+};
+/* Light version, used after tags are applied */
+static const struct cruncher crunchers_light[] = {
+ { block_url, CF_COUNT_AS_REJECT },
+ { redirect_url, CF_NO_FLAGS },
+ { NULL, 0 }
+};
+
+/*
+ * XXX: Don't we really mean
+ *
+ * #if defined(unix)
+ *
+ * here?
+ */
+#if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
/*********************************************************************
*
- * Function : chat
+ * Function : sig_handler
*
- * 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
- * function returns, the caller must close the client
- * socket handle.
+ * Description : Signal handler for different signals.
+ * Exit gracefully on TERM and INT
+ * or set a flag that will cause the errlog
+ * to be reopened by the main thread on HUP.
*
* Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
+ * 1 : the_signal = the signal cause this function to call
*
- * Returns : On success, the number of bytes written are returned (zero
- * indicates nothing was written). On error, -1 is returned,
- * and errno is set appropriately. If count is zero and the
- * file descriptor refers to a regular file, 0 will be
- * returned without causing any other effect. For a special
- * file, the results are not portable.
+ * Returns : -
*
*********************************************************************/
-static void chat(struct client_state *csp)
+static void sig_handler(int the_signal)
{
-/*
- * 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 FEATURE_TOGGLE
-# define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
-#else /* ifndef FEATURE_TOGGLE */
-# define IS_TOGGLED_ON_AND
-#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 FEATURE_FORCE_LOAD */
-
-#define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
-
- char buf[BUFFER_SIZE];
- char *hdr, *p, *req;
- fd_set rfds;
- int n, maxfd, server_body;
- int ms_iis5_hack = 0;
- int byte_count = 0;
- const struct forward_spec * fwd;
+ switch(the_signal)
+ {
+ case SIGTERM:
+ case SIGINT:
+ log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
+#if defined(unix)
+ if(pidfile)
+ {
+ unlink(pidfile);
+ }
+#endif /* unix */
+ exit(the_signal);
+ break;
+
+ case SIGHUP:
+#if defined(unix)
+ received_hup_signal = 1;
+#endif
+ break;
+
+ default:
+ /*
+ * We shouldn't be here, unless we catch signals
+ * in main() that we can't handle here!
+ */
+ log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
+ }
+ return;
+
+}
+#endif
+
+
+/*********************************************************************
+ *
+ * Function : client_protocol_is_unsupported
+ *
+ * Description : Checks if the client used a known unsupported
+ * protocol and deals with it by sending an error
+ * response.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : req = the first request line send by the client
+ *
+ * Returns : TRUE if an error response has been generated, or
+ * FALSE if the request doesn't look invalid.
+ *
+ *********************************************************************/
+static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
+{
+ /*
+ * 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))
+ {
+ const char *response = NULL;
+ const char *protocol = NULL;
+
+ if (!strncmpic(req, "GET ftp://", 10))
+ {
+ response = FTP_RESPONSE;
+ protocol = "FTP";
+ }
+ else
+ {
+ response = GOPHER_RESPONSE;
+ protocol = "GOPHER";
+ }
+ 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, response, strlen(response));
+
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+
+/*********************************************************************
+ *
+ * Function : get_request_destination_elsewhere
+ *
+ * Description : If the client's request was redirected into
+ * Privoxy without the client's knowledge,
+ * the request line lacks the destination host.
+ *
+ * This function tries to get it elsewhere,
+ * provided accept-intercepted-requests is enabled.
+ *
+ * "Elsewhere" currently only means "Host: header",
+ * but in the future we may ask the redirecting
+ * packet filter to look the destination up.
+ *
+ * If the destination stays unknown, an error
+ * response is send to the client and headers
+ * are freed so that chat() can return directly.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : headers = a header list
+ *
+ * Returns : JB_ERR_OK if the destination is now known, or
+ * JB_ERR_PARSE if it isn't.
+ *
+ *********************************************************************/
+static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
+{
+ char *req;
+
+ if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
+ {
+ log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
+ " Privoxy isn't configured to accept intercepted requests.",
+ csp->ip_addr_str, csp->http->cmd);
+ /* XXX: Use correct size */
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
+ csp->ip_addr_str, csp->http->cmd);
+
+ write_socket(csp->cfd, CHEADER, strlen(CHEADER));
+ destroy_list(headers);
+
+ return JB_ERR_PARSE;
+ }
+ else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
+ {
+ /* Split the domain we just got for pattern matching */
+ init_domain_components(csp->http);
+
+ return JB_ERR_OK;
+ }
+ else
+ {
+ /* We can't work without destination. Go spread the news.*/
+
+ req = list_to_text(headers);
+ chomp(req);
+ /* XXX: Use correct size */
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
+ csp->ip_addr_str, csp->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, csp->http->cmd, req);
+ freez(req);
+
+ write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
+ destroy_list(headers);
+
+ return JB_ERR_PARSE;
+ }
+ /*
+ * 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.
+ */
+}
+
+
+/*********************************************************************
+ *
+ * Function : get_server_headers
+ *
+ * Description : Parses server headers in iob and fills them
+ * into csp->headers so that they can later be
+ * handled by sed().
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : JB_ERR_OK if everything went fine, or
+ * JB_ERR_PARSE if the headers were incomplete.
+ *
+ *********************************************************************/
+static jb_err get_server_headers(struct client_state *csp)
+{
+ int continue_hack_in_da_house = 0;
+ char * header;
+
+ while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
+ {
+ if (header == NULL)
+ {
+ /*
+ * continue hack in da house. Ignore the ending of
+ * this head and continue enlisting header lines.
+ * The reason is described below.
+ */
+ enlist(csp->headers, "");
+ continue_hack_in_da_house = 0;
+ continue;
+ }
+ else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
+ {
+ /*
+ * It's a bodyless continue response, don't
+ * stop header parsing after reaching its end.
+ *
+ * As a result Privoxy will concatenate the
+ * next response's head and parse and deliver
+ * the headers as if they belonged to one request.
+ *
+ * The client will separate them because of the
+ * empty line between them.
+ *
+ * XXX: What we're doing here is clearly against
+ * the intended purpose of the continue header,
+ * and under some conditions (HTTP/1.0 client request)
+ * it's a standard violation.
+ *
+ * Anyway, "sort of against the spec" is preferable
+ * to "always getting confused by Continue responses"
+ * (Privoxy's behaviour before this hack was added)
+ */
+ log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
+ continue_hack_in_da_house = 1;
+ }
+ else if (*header == '\0')
+ {
+ /*
+ * If the header is empty, but the Continue hack
+ * isn't active, we can assume that we reached the
+ * end of the buffer before we hit the end of the
+ * head.
+ *
+ * Inform the caller an let it decide how to handle it.
+ */
+ return JB_ERR_PARSE;
+ }
+
+ if (JB_ERR_MEMORY == enlist(csp->headers, header))
+ {
+ /*
+ * XXX: Should we quit the request and return a
+ * out of memory error page instead?
+ */
+ log_error(LOG_LEVEL_ERROR,
+ "Out of memory while enlisting server headers. %s lost.",
+ header);
+ }
+ freez(header);
+ }
+
+ return JB_ERR_OK;
+}
+
+
+/*********************************************************************
+ *
+ * Function : crunch_reason
+ *
+ * Description : Translates the crunch reason code into a string.
+ *
+ * Parameters :
+ * 1 : rsp = a http_response
+ *
+ * Returns : A string with the crunch reason or an error description.
+ *
+ *********************************************************************/
+static const char *crunch_reason(const struct http_response *rsp)
+{
+ char * reason = NULL;
+
+ assert(rsp != NULL);
+ if (rsp == NULL)
+ {
+ return "Internal error while searching for crunch reason";
+ }
+
+ switch (rsp->reason)
+ {
+ case RSP_REASON_UNSUPPORTED:
+ reason = "Unsupported HTTP feature";
+ break;
+ case RSP_REASON_BLOCKED:
+ reason = "Blocked";
+ break;
+ case RSP_REASON_UNTRUSTED:
+ reason = "Untrusted";
+ break;
+ case RSP_REASON_REDIRECTED:
+ reason = "Redirected";
+ break;
+ case RSP_REASON_CGI_CALL:
+ reason = "CGI Call";
+ break;
+ case RSP_REASON_NO_SUCH_DOMAIN:
+ reason = "DNS failure";
+ break;
+ case RSP_REASON_FORWARDING_FAILED:
+ reason = "Forwarding failed";
+ break;
+ case RSP_REASON_CONNECT_FAILED:
+ reason = "Connection failure";
+ break;
+ case RSP_REASON_OUT_OF_MEMORY:
+ reason = "Out of memory (may mask other reasons)";
+ break;
+ default:
+ reason = "No reason recorded";
+ break;
+ }
+
+ return reason;
+}
+
+
+/*********************************************************************
+ *
+ * Function : send_crunch_response
+ *
+ * Description : Delivers already prepared response for
+ * intercepted requests, logs the interception
+ * and frees the response.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 1 : rsp = Fully prepared response. Will be freed on exit.
+ *
+ * Returns : Nothing.
+ *
+ *********************************************************************/
+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];
+
+ assert(rsp != NULL);
+ assert(rsp->head != NULL);
+
+ if (rsp == NULL)
+ {
+ /*
+ * Not supposed to happen. If it does
+ * anyway, treat it as an unknown error.
+ */
+ cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
+ /* return code doesn't matter */
+ }
+
+ if (rsp == NULL)
+ {
+ /* If rsp is still NULL, we have serious internal problems. */
+ log_error(LOG_LEVEL_FATAL,
+ "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
+ }
+
+ /*
+ * Extract the status code from the actual head
+ * that was send to the client. It is the only
+ * way to get it right for all requests, including
+ * the fixed ones for out-of-memory problems.
+ *
+ * A head starts like this: 'HTTP/1.1 200...'
+ * 0123456789|11
+ * 10
+ */
+ status_code[0] = rsp->head[9];
+ status_code[1] = rsp->head[10];
+ status_code[2] = rsp->head[11];
+ status_code[3] = '\0';
+
+ /* Write the answer to the client */
+ if (write_socket(csp->cfd, rsp->head, rsp->head_length)
+ || write_socket(csp->cfd, rsp->body, rsp->content_length))
+ {
+ /* There is nothing we can do about it. */
+ log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
+ }
+
+ /* Log that the request was crunched and why. */
+ log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %u",
+ csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
+
+ /* Clean up and return */
+ if (cgi_error_memory() != rsp)
+ {
+ free_http_response(rsp);
+ }
+ return;
+}
+
+
+#if 0
+/*********************************************************************
+ *
+ * Function : request_contains_null_bytes
+ *
+ * Description : Checks for NULL bytes in the request and sends
+ * an error message to the client if any were found.
+ *
+ * XXX: currently not used, see comment in chat().
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : buf = Data from the client's request to check.
+ * 3 : len = The data length.
+ *
+ * Returns : TRUE if the request contained one or more NULL bytes, or
+ * FALSE otherwise.
+ *
+ *********************************************************************/
+static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
+{
+ size_t c_len; /* Request lenght when treated as C string */
+
+ c_len = strlen(buf);
+
+ if (c_len < len)
+ {
+ /*
+ * Null byte(s) found. Log the request,
+ * return an error response and hang up.
+ */
+ size_t tmp_len = c_len;
+
+ do
+ {
+ /*
+ * Replace NULL byte(s) with '°' characters
+ * so the request can be logged as string.
+ * XXX: Is there a better replacement character?
+ */
+ buf[tmp_len]='°';
+ tmp_len += strlen(buf+tmp_len);
+ } while (tmp_len < len);
+
+ log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
+ "(length=%d, strlen=%u).", csp->ip_addr_str, len, c_len);
+ log_error(LOG_LEVEL_HEADER,
+ "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
+
+ write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
+
+ /* XXX: Log correct size */
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
+
+ return TRUE;
+ }
+
+ return FALSE;
+}
+#endif
+
+
+/*********************************************************************
+ *
+ * Function : crunch_response_triggered
+ *
+ * Description : Checks if the request has to be crunched,
+ * and delivers the crunch response if necessary.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : crunchers = list of cruncher functions to run
+ *
+ * Returns : TRUE if the request was answered with a crunch response
+ * FALSE otherwise.
+ *
+ *********************************************************************/
+static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
+{
+ struct http_response *rsp = NULL;
+ const struct cruncher *c;
+
+ /*
+ * If CGI request crunching is disabled,
+ * check the CGI dispatcher out of order to
+ * prevent unintentional blocks or redirects.
+ */
+ if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
+ && (NULL != (rsp = dispatch_cgi(csp))))
+ {
+ /* Deliver, log and free the interception response. */
+ send_crunch_response(csp, rsp);
+ return TRUE;
+ }
+
+ for (c = crunchers; c->cruncher != NULL; c++)
+ {
+ /*
+ * Check the cruncher if either Privoxy is toggled
+ * on and the request isn't forced, or if the cruncher
+ * applies to forced requests as well.
+ */
+ if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
+ !(csp->flags & CSP_FLAG_FORCED)) ||
+ (c->flags & CF_IGNORE_FORCE))
+ {
+ rsp = c->cruncher(csp);
+ if (NULL != rsp)
+ {
+ /* Deliver, log and free the interception response. */
+ send_crunch_response(csp, rsp);
+#ifdef FEATURE_STATISTICS
+ if (c->flags & CF_COUNT_AS_REJECT)
+ {
+ csp->flags |= CSP_FLAG_REJECTED;
+ }
+#endif /* def FEATURE_STATISTICS */
+
+ return TRUE;
+ }
+ }
+ }
+
+ return FALSE;
+}
+
+
+/*********************************************************************
+ *
+ * Function : build_request_line
+ *
+ * Description : Builds the HTTP request line.
+ *
+ * If a HTTP forwarder is used it expects the whole URL,
+ * web servers only get the path.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : fwd = The forwarding spec used for the request
+ * XXX: Should use http->fwd instead.
+ * 3 : request_line = The old request line which will be replaced.
+ *
+ * Returns : Nothing. Terminates in case of memory problems.
+ *
+ *********************************************************************/
+static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
+{
+ struct http_request *http = csp->http;
+
+ assert(http->ssl == 0);
+
+ /*
+ * Downgrade http version from 1.1 to 1.0
+ * if +downgrade action applies.
+ */
+ if ( (csp->action->flags & ACTION_DOWNGRADE)
+ && (!strcmpic(http->ver, "HTTP/1.1")))
+ {
+ freez(http->ver);
+ http->ver = strdup("HTTP/1.0");
+
+ if (http->ver == NULL)
+ {
+ log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
+ }
+ }
+
+ /*
+ * Rebuild the request line.
+ */
+ freez(*request_line);
+ *request_line = strdup(http->gpc);
+ string_append(request_line, " ");
+
+ if (fwd->forward_host)
+ {
+ string_append(request_line, http->url);
+ }
+ else
+ {
+ string_append(request_line, http->path);
+ }
+ string_append(request_line, " ");
+ string_append(request_line, http->ver);
+
+ if (*request_line == NULL)
+ {
+ log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
+ }
+ log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
+}
+
+
+/*********************************************************************
+ *
+ * Function : change_request_destination
+ *
+ * Description : Parse a (rewritten) request line and regenerate
+ * the http request data.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : Forwards the parse_http_request() return code.
+ * Terminates in case of memory problems.
+ *
+ *********************************************************************/
+static jb_err change_request_destination(struct client_state *csp)
+{
+ struct http_request *http = csp->http;
+ jb_err err;
+
+ log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
+ free_http_request(http);
+ err = parse_http_request(csp->headers->first->str, http);
+ if (JB_ERR_OK != err)
+ {
+ log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
+ jb_err_to_string(err));
+ }
+ else
+ {
+ /* XXX: ocmd is a misleading name */
+ http->ocmd = strdup(http->cmd);
+ if (http->ocmd == NULL)
+ {
+ log_error(LOG_LEVEL_FATAL,
+ "Out of memory copying rewritten HTTP request line");
+ }
+ }
+
+ return err;
+}
+
+
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+/*********************************************************************
+ *
+ * Function : server_response_is_complete
+ *
+ * Description : Determines whether we should stop reading
+ * from the server socket.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : content_length = Length of content received so far.
+ *
+ * Returns : TRUE if the response is complete,
+ * FALSE otherwise.
+ *
+ *********************************************************************/
+static int server_response_is_complete(struct client_state *csp,
+ unsigned long long content_length)
+{
+ int content_length_known = !!(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
+
+ if (!strcmpic(csp->http->gpc, "HEAD"))
+ {
+ /*
+ * "HEAD" implies no body, we are thus expecting
+ * no content. XXX: incomplete "list" of methods?
+ */
+ csp->expected_content_length = 0;
+ content_length_known = TRUE;
+ }
+
+ if (csp->http->status == 304)
+ {
+ /*
+ * Expect no body. XXX: incomplete "list" of status codes?
+ */
+ csp->expected_content_length = 0;
+ content_length_known = TRUE;
+ }
+
+ return (content_length_known && ((0 == csp->expected_content_length)
+ || (csp->expected_content_length <= content_length)));
+}
+
+
+/*********************************************************************
+ *
+ * Function : wait_for_alive_connections
+ *
+ * Description : Waits for alive connections to timeout.
+ *
+ * Parameters : N/A
+ *
+ * Returns : N/A
+ *
+ *********************************************************************/
+static void wait_for_alive_connections()
+{
+ int connections_alive = close_unusable_connections();
+
+ while (0 < connections_alive)
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Waiting for %d connections to timeout.",
+ connections_alive);
+ sleep(60);
+ connections_alive = close_unusable_connections();
+ }
+
+ log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
+
+}
+#endif /* FEATURE_CONNECTION_KEEP_ALIVE */
+
+
+/*********************************************************************
+ *
+ * Function : mark_server_socket_tainted
+ *
+ * Description : Makes sure we don't reuse a server socket
+ * (if we didn't read everything the server sent
+ * us reusing the socket would lead to garbage).
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : void.
+ *
+ *********************************************************************/
+static void mark_server_socket_tainted(struct client_state *csp)
+{
+ if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
+ {
+ log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
+ csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
+ }
+}
+
+/*********************************************************************
+ *
+ * Function : get_request_line
+ *
+ * Description : Read the client request line.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : Pointer to request line or NULL in case of errors.
+ *
+ *********************************************************************/
+static char *get_request_line(struct client_state *csp)
+{
+ char buf[BUFFER_SIZE];
+ char *request_line = NULL;
+ int len;
+
+ memset(buf, 0, sizeof(buf));
+
+ do
+ {
+ if (!data_is_available(csp->cfd, csp->config->socket_timeout))
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Stopped waiting for the request line.");
+ write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
+ strlen(CONNECTION_TIMEOUT_RESPONSE));
+ return NULL;
+ }
+
+ len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
+
+ if (len <= 0) return NULL;
+
+ /*
+ * 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 NULL;
+ }
+
+ request_line = get_header(csp->iob);
+
+ } while ((NULL != request_line) && ('\0' == *request_line));
+
+ return request_line;
+
+}
+
+
+/*********************************************************************
+ *
+ * Function : receive_client_request
+ *
+ * Description : Read the client's request (more precisely the
+ * client headers) and answer it if necessary.
+ *
+ * Note that since we're not using select() we could get
+ * blocked here if a client connected, then didn't say
+ * anything!
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
+ *
+ *********************************************************************/
+static jb_err receive_client_request(struct client_state *csp)
+{
+ char buf[BUFFER_SIZE];
+ char *p;
+ char *req = NULL;
struct http_request *http;
-#ifdef FEATURE_KILL_POPUPS
- int block_popups; /* bool, 1==will block popups */
- int block_popups_now = 0; /* bool, 1==currently blocking popups */
-#endif /* def FEATURE_KILL_POPUPS */
+ int len;
+ jb_err err;
- int pcrs_filter; /* bool, 1==will filter through pcrs */
- int gif_deanimate; /* bool, 1==will deanimate gifs */
+ /* Temporary copy of the client's headers before they get enlisted in csp->headers */
+ struct list header_list;
+ struct list *headers = &header_list;
- /* Function that does the content filtering for the current request */
- char *(*content_filter)() = NULL;
+ http = csp->http;
- /* Skeleton for HTTP response, if we should intercept the request */
- struct http_response *rsp;
+ memset(buf, 0, sizeof(buf));
- http = csp->http;
+ req = get_request_line(csp);
+ if (req == NULL)
+ {
+ return JB_ERR_PARSE;
+ }
+ assert(*req != '\0');
+
+ if (client_protocol_is_unsupported(csp, req))
+ {
+ return JB_ERR_PARSE;
+ }
+#ifdef FEATURE_FORCE_LOAD
/*
- * Read the client's request. Note that since we're not using select() we
- * could get blocked here if a client connected, then didn't say anything!
+ * If this request contains the FORCE_PREFIX and blocks
+ * aren't enforced, get rid of it and set the force flag.
*/
-
- while (FOREVER)
+ if (strstr(req, FORCE_PREFIX))
{
- n = read_socket(csp->cfd, buf, sizeof(buf));
-
- if (n <= 0) break; /* error! */
+ if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
+ {
+ log_error(LOG_LEVEL_FORCE,
+ "Ignored force prefix in request: \"%s\".", req);
+ }
+ else
+ {
+ strclean(req, FORCE_PREFIX);
+ log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
+ csp->flags |= CSP_FLAG_FORCED;
+ }
+ }
+#endif /* def FEATURE_FORCE_LOAD */
- add_to_iob(csp, buf, n);
+ err = parse_http_request(req, http);
+ freez(req);
+ if (JB_ERR_OK != err)
+ {
+ write_socket(csp->cfd, CHEADER, strlen(CHEADER));
+ /* XXX: Use correct size */
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
+ log_error(LOG_LEVEL_ERROR,
+ "Couldn't parse request line received from %s: %s",
+ csp->ip_addr_str, jb_err_to_string(err));
+
+ free_http_request(http);
+ return JB_ERR_PARSE;
+ }
- req = get_header(csp);
+ /* grab the rest of the client's headers */
+ init_list(headers);
+ for (;;)
+ {
+ p = get_header(csp->iob);
- if (req == NULL)
+ if (p == NULL)
{
- break; /* no HTTP request! */
+ /* There are no additional headers to read. */
+ break;
}
- if (*req == '\0')
+ if (*p == '\0')
+ {
+ /*
+ * We didn't receive a complete header
+ * line yet, get the rest of it.
+ */
+ if (!data_is_available(csp->cfd, csp->config->socket_timeout))
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Stopped grabbing the client headers.");
+ return JB_ERR_PARSE;
+ }
+
+ 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 JB_ERR_PARSE;
+ }
+
+ 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 JB_ERR_MEMORY;
+ }
+ }
+ else
{
- continue; /* more to come! */
+ /*
+ * We were able to read a complete
+ * header and can finaly enlist it.
+ */
+ enlist(headers, p);
+ freez(p);
}
+ }
-#ifdef FEATURE_FORCE_LOAD
- /* If this request contains the FORCE_PREFIX,
- * better get rid of it now and set the force flag --oes
+ if (http->host == NULL)
+ {
+ /*
+ * If we still don't know the request destination,
+ * the request is invalid or the client uses
+ * Privoxy without its knowledge.
*/
-
- if (strstr(req, FORCE_PREFIX))
+ if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
{
- strclean(req, FORCE_PREFIX);
- log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
- csp->flags |= CSP_FLAG_FORCED;
+ /*
+ * Our attempts to get the request destination
+ * elsewhere failed or Privoxy is configured
+ * to only accept proxy requests.
+ *
+ * An error response has already been send
+ * and we're done here.
+ */
+ return JB_ERR_PARSE;
}
+ }
-#endif /* def FEATURE_FORCE_LOAD */
+ /*
+ * Determine the actions for this URL
+ */
+#ifdef FEATURE_TOGGLE
+ if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
+ {
+ /* Most compatible set of actions (i.e. none) */
+ init_current_action(csp->action);
+ }
+ else
+#endif /* ndef FEATURE_TOGGLE */
+ {
+ get_url_actions(csp, http);
+ }
- parse_http_request(req, http, csp);
- freez(req);
- break;
+ /*
+ * Save a copy of the original request for logging
+ */
+ http->ocmd = strdup(http->cmd);
+ if (http->ocmd == NULL)
+ {
+ log_error(LOG_LEVEL_FATAL,
+ "Out of memory copying HTTP request line");
+ }
+ enlist(csp->headers, http->cmd);
+
+ /* Append the previously read headers */
+ list_append_list_unique(csp->headers, headers);
+ destroy_list(headers);
+
+ return JB_ERR_OK;
+
+}
+
+
+/*********************************************************************
+ *
+ * Function : parse_client_request
+ *
+ * Description : Parses the client's request and decides what to do
+ * with it.
+ *
+ * Note that since we're not using select() we could get
+ * blocked here if a client connected, then didn't say
+ * anything!
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : JB_ERR_OK or JB_ERR_PARSE
+ *
+ *********************************************************************/
+static jb_err parse_client_request(struct client_state *csp)
+{
+ struct http_request *http = csp->http;
+ jb_err err;
+
+ err = sed(csp, FILTER_CLIENT_HEADERS);
+ if (JB_ERR_OK != err)
+ {
+ /* XXX: Should be handled in sed(). */
+ assert(err == JB_ERR_PARSE);
+ log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
}
+ csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
- if (http->cmd == NULL)
+ /* Check request line for rewrites. */
+ if ((NULL == csp->headers->first->str)
+ || (strcmp(http->cmd, csp->headers->first->str) &&
+ (JB_ERR_OK != change_request_destination(csp))))
{
- strcpy(buf, CHEADER);
- write_socket(csp->cfd, buf, strlen(buf));
+ /*
+ * A header filter broke the request line - bail out.
+ */
+ write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
+ /* XXX: Use correct size */
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
+ log_error(LOG_LEVEL_ERROR,
+ "Invalid request line after applying header filters.");
+ free_http_request(http);
+
+ return JB_ERR_PARSE;
+ }
+
+ return JB_ERR_OK;
+
+}
+
+
+/*********************************************************************
+ *
+ * Function : chat
+ *
+ * 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
+ * function returns, the caller must close the client
+ * socket handle.
+ *
+ * FIXME: chat is nearly thousand lines long.
+ * Ridiculous.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : Nothing.
+ *
+ *********************************************************************/
+static void chat(struct client_state *csp)
+{
+ char buf[BUFFER_SIZE];
+ char *hdr;
+ char *p;
+ fd_set rfds;
+ int n;
+ jb_socket maxfd;
+ int server_body;
+ int ms_iis5_hack = 0;
+ unsigned long long byte_count = 0;
+ int forwarded_connect_retries = 0;
+ int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
+ const struct forward_spec *fwd;
+ struct http_request *http;
+ long len = 0; /* for buffer sizes (and negative error codes) */
+
+ /* Function that does the content filtering for the current request */
+ filter_function_ptr content_filter = NULL;
+
+ /* Skeleton for HTTP response, if we should intercept the request */
+ struct http_response *rsp;
+ struct timeval timeout;
- log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
+ memset(buf, 0, sizeof(buf));
+
+ http = csp->http;
+ if (receive_client_request(csp) != JB_ERR_OK)
+ {
+ return;
+ }
+ if (parse_client_request(csp) != JB_ERR_OK)
+ {
return;
}
/* decide how to route the HTTP request */
-
- if ((fwd = forward_url(http, csp)) == NULL)
+ 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 */
+ return;
}
- /* 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
*
*/
- /*
- * Determine the actions for this URL
- */
-#ifdef FEATURE_TOGGLE
- if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
- {
- /* 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( ( !(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)) )
- {
- 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;
- }
- }
-
-
- /*
- * 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)
+ if (http->ssl && connect_port_is_forbidden(csp))
{
- freez(http->ver);
- http->ver = strdup("HTTP/1.0");
+ 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;
}
- /*
- * (Re)build the HTTP request for non-SSL requests.
- * If forwarding, use the whole URL, else, use only the path.
- */
if (http->ssl == 0)
{
- 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 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)
- && 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);
+ freez(csp->headers->first->str);
+ build_request_line(csp, fwd, &csp->headers->first->str);
}
-#endif /* def FEATURE_COOKIE_JAR */
-
-
-#ifdef FEATURE_KILL_POPUPS
- block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
-#endif /* def FEATURE_KILL_POPUPS */
-
- pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
- ((csp->action->flags & ACTION_FILTER) != 0);
-
- gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
-
- /* grab the rest of the client's headers */
-
- while (FOREVER)
- {
- if ( ( p = get_header(csp) ) && ( *p == '\0' ) )
- {
- n = read_socket(csp->cfd, buf, sizeof(buf));
- if (n <= 0)
- {
- log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
- return;
- }
- add_to_iob(csp, buf, n);
- 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 ..
+ * We have a request. Check if one of the crunchers wants it.
*/
-
- if (
- /* a CGI call was detected and answered */
- (NULL != (rsp = dispatch_cgi(csp)))
-
- /* or we are enabled and... */
- || (IS_ENABLED_AND (
-
- /* ..the request was blocked */
- ( NULL != (rsp = block_url(csp)))
-
- /* ..or untrusted */
-#ifdef FEATURE_TRUST
- || ( 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 */
- ))
- )
+ if (crunch_response_triggered(csp, crunchers_all))
{
- /* 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))
- {
- log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
- }
-
-#ifdef FEATURE_STATISTICS
- /* Count as a rejected request */
- 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);
+ /*
+ * Yes. The client got the crunch response
+ * and we are done here after cleaning up.
+ */
+ /* XXX: why list_remove_all()? */
+ list_remove_all(csp->headers);
- /* Clean up and return */
- free_http_response(rsp);
return;
}
if (fwd->forward_host)
{
log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
- fwd->forward_host, fwd->forward_port, http->hostport);
+ fwd->forward_host, fwd->forward_port, http->hostport);
}
else
{
/* here we connect to the server, gateway, or the forwarder */
- csp->sfd = forwarded_connect(fwd, http, csp);
-
- if (csp->sfd < 0)
+ while ((csp->sfd = forwarded_connect(fwd, http, csp))
+ && (errno == EINVAL)
+ && (forwarded_connect_retries++ < max_forwarded_connect_retries))
{
- log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
- http->hostport);
+ log_error(LOG_LEVEL_ERROR,
+ "failed request #%u to connect to %s. Trying again.",
+ forwarded_connect_retries, http->hostport);
+ }
- if (errno == EINVAL)
+ if (csp->sfd == JB_INVALID_SOCKET)
+ {
+ if (fwd->type != SOCKS_NONE)
+ {
+ /* Socks error. */
+ rsp = error_response(csp, "forwarding-failed", errno);
+ }
+ else if (errno == EINVAL)
{
rsp = error_response(csp, "no-such-domain", errno);
-
- log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
- csp->ip_addr_str, http->cmd);
}
else
{
rsp = error_response(csp, "connect-failed", errno);
-
- log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
- csp->ip_addr_str, http->cmd);
+ log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
+ http->hostport);
}
-
/* Write the answer to the client */
- if(rsp)
+ if (rsp != NULL)
{
- 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))
- {
- log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
- }
+ send_crunch_response(csp, rsp);
}
- free_http_response(rsp);
return;
}
- log_error(LOG_LEVEL_CONNECT, "OK");
-
- hdr = sed(client_patterns, add_client_headers, csp);
+ hdr = list_to_text(csp->headers);
+ 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
+ /*
+ * Write the client's (modified) header to the server
* (along with anything else that may be in the buffer)
*/
-
- n = strlen(hdr);
-
- if ((write_socket(csp->sfd, hdr, n) != n)
- || (flush_socket(csp->sfd, csp ) < 0))
+ if (write_socket(csp->sfd, hdr, strlen(hdr))
+ || (flush_socket(csp->sfd, csp->iob) < 0))
{
- 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_CONNECT,
+ "write header to: %s failed: %E", http->hostport);
rsp = error_response(csp, "connect-failed", errno);
-
- if(rsp)
+ 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))
- {
- log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
- }
+ send_crunch_response(csp, rsp);
}
- free_http_response(rsp);
freez(hdr);
return;
}
* 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);
-
- if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1) < 0)
+ if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
{
freez(hdr);
return;
IOB_RESET(csp);
}
+ log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
+
/* we're finished with the client's header */
freez(hdr);
- maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
+ maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
/* pass data between the client and server
* until one or the other shuts down the connection.
server_body = 0;
- while (FOREVER)
+ for (;;)
{
+#ifdef __OS2__
+ /*
+ * FD_ZERO here seems to point to an errant macro which crashes.
+ * So do this by hand for now...
+ */
+ memset(&rfds,0x00,sizeof(fd_set));
+#else
FD_ZERO(&rfds);
-
+#endif
FD_SET(csp->cfd, &rfds);
FD_SET(csp->sfd, &rfds);
- n = select(maxfd+1, &rfds, NULL, NULL, NULL);
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ if ((csp->flags & CSP_FLAG_CHUNKED)
+ && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
+ && ((csp->iob->eod - csp->iob->cur) >= 5)
+ && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Looks like we read the last chunk together with "
+ "the server headers. We better stop reading.");
+ byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
+ csp->expected_content_length = byte_count;
+ csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
+ }
+ if (server_body && server_response_is_complete(csp, byte_count))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Done reading from server. Expected content length: %llu. "
+ "Actual content length: %llu. Most recently received: %d.",
+ csp->expected_content_length, byte_count, len);
+ len = 0;
+ /*
+ * XXX: should not jump around,
+ * chat() is complicated enough already.
+ */
+ goto reading_done;
+ }
+#endif /* FEATURE_CONNECTION_KEEP_ALIVE */
+
+ timeout.tv_sec = csp->config->socket_timeout;
+ timeout.tv_usec = 0;
+ n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
- if (n < 0)
+ if (n == 0)
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Didn't receive data in time: %s", http->url);
+ if ((byte_count == 0) && (http->ssl == 0))
+ {
+ write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
+ strlen(CONNECTION_TIMEOUT_RESPONSE));
+ }
+ mark_server_socket_tainted(csp);
+ return;
+ }
+ else if (n < 0)
{
log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
+ mark_server_socket_tainted(csp);
return;
}
- /* this is the body of the browser's request
- * just read it and write it.
+ /*
+ * This is the body of the browser's request,
+ * just read and write it.
*/
-
if (FD_ISSET(csp->cfd, &rfds))
{
- n = read_socket(csp->cfd, buf, sizeof(buf));
+ len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
- if (n <= 0)
+ if (len <= 0)
{
+ /* XXX: not sure if this is necessary. */
+ mark_server_socket_tainted(csp);
break; /* "game over, man" */
}
- if (write_socket(csp->sfd, buf, n) != n)
+ if (write_socket(csp->sfd, buf, (size_t)len))
{
log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
+ mark_server_socket_tainted(csp);
return;
}
continue;
}
/*
- * The server wants to talk. It could be the header or the body.
+ * 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'? No.
*/
-
-
if (FD_ISSET(csp->sfd, &rfds))
{
- fflush( 0 );
- n = read_socket(csp->sfd, buf, sizeof(buf) - 1);
+ fflush(0);
+ len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
- if (n < 0)
+ if (len < 0)
{
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);
+ if (http->ssl && (fwd->forward_host == NULL))
+ {
+ /*
+ * Just hang up. We already confirmed the client's CONNECT
+ * request with status code 200 and unencrypted content is
+ * no longer welcome.
+ */
+ log_error(LOG_LEVEL_ERROR,
+ "CONNECT already confirmed. Unable to tell the client about the problem.");
+ return;
+ }
+ else if (byte_count)
+ {
+ /*
+ * Just hang up. We already transmitted the original headers
+ * and parts of the original content and therefore missed the
+ * chance to send an error message (without risking data corruption).
+ *
+ * XXX: we could retry with a fancy range request here.
+ */
+ log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
+ "Unable to tell the client about the problem.");
+ mark_server_socket_tainted(csp);
+ return;
+ }
rsp = error_response(csp, "connect-failed", errno);
-
- if(rsp)
+ 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))
- {
- log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
- }
+ send_crunch_response(csp, rsp);
}
- free_http_response(rsp);
return;
}
- /* Add a trailing zero. This lets filter_popups
- * use string operations.
- */
- buf[n] = '\0';
-
-#ifdef FEATURE_KILL_POPUPS
- /* Filter the popups on this read. */
- if (block_popups_now)
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ if (csp->flags & CSP_FLAG_CHUNKED)
{
- filter_popups(buf, csp);
+ if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
+ {
+ /* XXX: this is a temporary hack */
+ log_error(LOG_LEVEL_CONNECT,
+ "Looks like we reached the end of the last chunk. "
+ "We better stop reading.");
+ csp->expected_content_length = byte_count + (unsigned long long)len;
+ csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
+ }
}
-#endif /* def FEATURE_KILL_POPUPS */
+ reading_done:
+#endif /* FEATURE_CONNECTION_KEEP_ALIVE */
- /* Normally, this would indicate that we've read
+ /*
+ * Add a trailing zero to let be able to use string operations.
+ * XXX: do we still need this with filter_popups gone?
+ */
+ buf[len] = '\0';
+
+ /*
+ * 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
* in its wisdom has released IIS/5 with a bug that
* doesn't generate a valid header, then we won't
* transmit anything to the client.
*/
- if (n == 0)
+ if (len == 0)
{
if (server_body || http->ssl)
*/
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 = csp->iob->eod - csp->iob->cur;
+ csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
}
- hdr = sed(server_patterns, add_server_headers, csp);
- n = strlen(hdr);
+ if (JB_ERR_OK != update_server_headers(csp))
+ {
+ log_error(LOG_LEVEL_FATAL,
+ "Failed to update server headers. after filtering.");
+ }
+
+ hdr = list_to_text(csp->headers);
+ if (hdr == NULL)
+ {
+ /* FIXME Should handle error properly */
+ log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
+ }
- if ((write_socket(csp->cfd, hdr, n) != n)
- || (write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length) != (int)csp->content_length))
+ if (write_socket(csp->cfd, hdr, strlen(hdr))
+ || write_socket(csp->cfd,
+ ((p != NULL) ? p : csp->iob->cur), (size_t)csp->content_length))
{
log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
+ freez(hdr);
+ freez(p);
+ mark_server_socket_tainted(csp);
return;
}
freez(hdr);
- if (NULL != p) {
- freez(p);
- }
+ freez(p);
}
break; /* "game over, man" */
* This is NOT the body, so
* Let's pretend the server just sent us a blank line.
*/
- n = sprintf(buf, "\r\n");
+ snprintf(buf, sizeof(buf), "\r\n");
+ len = (int)strlen(buf);
/*
* Now, let the normal header parsing algorithm below do its
* 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)
{
if (content_filter)
{
- 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 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))
{
- log_error(LOG_LEVEL_ERROR, "Buffer size limit reached! Flushing and stepping back.");
+ size_t hdrlen;
+ long flushed;
- hdr = sed(server_patterns, add_server_headers, csp);
- n = strlen(hdr);
- byte_count += n;
+ log_error(LOG_LEVEL_INFO,
+ "Flushing header and buffers. Stepping back from filtering.");
- if (((write_socket(csp->cfd, hdr, n) != n)
- || (n = flush_socket(csp->cfd, csp) < 0)))
+ hdr = list_to_text(csp->headers);
+ if (hdr == NULL)
{
- log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
+ /*
+ * 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();
+ send_crunch_response(csp, rsp);
+ mark_server_socket_tainted(csp);
+ return;
+ }
+ hdrlen = strlen(hdr);
+ if (write_socket(csp->cfd, hdr, hdrlen)
+ || ((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");
freez(hdr);
+ mark_server_socket_tainted(csp);
return;
}
+ /*
+ * Reset the byte_count to the amount of bytes
+ * we just flushed. len will be added a few lines below,
+ * hdrlen doesn't matter for LOG_LEVEL_CLF.
+ */
+ byte_count = (unsigned long long)flushed;
freez(hdr);
- byte_count += n;
-
content_filter = NULL;
server_body = 1;
-
}
}
else
{
- if (write_socket(csp->cfd, buf, n) != n)
+ if (write_socket(csp->cfd, buf, (size_t)len))
{
log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
+ mark_server_socket_tainted(csp);
return;
}
}
- byte_count += n;
+ byte_count += (unsigned long long)len;
continue;
}
else
{
- /* we're still looking for the end of the
- * server's header ... (does that make header
- * parsing an "out of body experience" ?
+ const char *header_start;
+ /*
+ * We're still looking for the end of the server's header.
+ * Buffer up the data we just read. If that fails, there's
+ * little we can do but send our static out-of-memory page.
*/
-
- /* buffer up the data we just read */
- add_to_iob(csp, buf, n);
-
- /* get header lines from the iob */
-
- while ((p = get_header(csp)))
+ if (add_to_iob(csp, buf, len))
{
- if (*p == '\0')
- {
- /* see following note */
- break;
- }
- enlist(csp->headers, p);
- freez(p);
+ log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
+ rsp = cgi_error_memory();
+ send_crunch_response(csp, rsp);
+ mark_server_socket_tainted(csp);
+ return;
}
- /* NOTE: there are no "empty" headers so
- * if the pointer `p' is not NULL we must
- * assume that we reached the end of the
- * buffer before we hit the end of the header.
- */
+ header_start = csp->iob->cur;
- if (p)
+ /* Convert iob into something sed() can digest */
+ if (JB_ERR_PARSE == get_server_headers(csp))
{
if (ms_iis5_hack)
{
- /* Well, we tried our MS IIS/5
- * hack and it didn't work.
- * The header is incomplete
- * and there isn't anything
+ /*
+ * Well, we tried our MS IIS/5 hack and it didn't work.
+ * The header is incomplete 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
{
- /* Since we have to wait for
- * more from the server before
- * we can parse the headers
- * we just continue here.
+ /*
+ * Since we have to wait for more from the server before
+ * we can parse the headers we just continue here.
*/
+ long header_offset = csp->iob->cur - header_start;
+ assert(csp->iob->cur >= header_start);
+ byte_count += (unsigned long long)(len - header_offset);
+ log_error(LOG_LEVEL_CONNECT, "Continuing buffering headers. "
+ "byte_count: %llu. header_offset: %d. len: %d.",
+ byte_count, header_offset, len);
continue;
}
}
- /* we have now received the entire header.
- * filter it and send the result to the client
- */
-
- hdr = sed(server_patterns, add_server_headers, csp);
- n = strlen(hdr);
-
- /* write the server's (modified) header to
- * the client (along with anything else that
- * may be in the buffer)
- */
-
-#ifdef FEATURE_KILL_POPUPS
- /* Start blocking popups if appropriate. */
+ /* Did we actually get anything? */
+ if (NULL == csp->headers->first)
+ {
+ log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
+ write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
+ free_http_request(http);
+ mark_server_socket_tainted(csp);
+ return;
+ }
- if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
- !http->ssl && /* We talk plaintext */
- block_popups) /* Policy allows */
+ assert(csp->headers->first->str);
+ assert(!http->ssl);
+ if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
+ strncmpic(csp->headers->first->str, "ICY", 3))
{
- block_popups_now = 1;
/*
- * Filter the part of the body that came in the same read
- * as the last headers:
+ * It doesn't look like a HTTP (or Shoutcast) response:
+ * tell the client and log the problem.
*/
- filter_popups(csp->iob->cur, csp);
+ 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);
+ mark_server_socket_tainted(csp);
+ return;
}
-#endif /* def FEATURE_KILL_POPUPS */
-
- /* Buffer and pcrs filter this if appropriate. */
-
- if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
- !http->ssl && /* We talk plaintext */
- pcrs_filter) /* Policy allows */
+ /*
+ * We have now received the entire server header,
+ * filter it and send the result to the client
+ */
+ if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
{
- content_filter = pcrs_filter_response;
+ log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
}
-
- /* Buffer and gif_deanimate this if appropriate. */
-
- if ((csp->content_type & CT_GIF) && /* It's a image/gif MIME-Type */
- !http->ssl && /* We talk plaintext */
- gif_deanimate) /* Policy allows */
+ hdr = list_to_text(csp->headers);
+ if (hdr == NULL)
{
- content_filter = gif_deanimate_response;
+ /* FIXME Should handle error properly */
+ log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
}
+ if (crunch_response_triggered(csp, crunchers_light))
+ {
+ /*
+ * One of the tags created by a server-header
+ * tagger triggered a crunch. We already
+ * delivered the crunch response to the client
+ * and are done here after cleaning up.
+ */
+ freez(hdr);
+ mark_server_socket_tainted(csp);
+ return;
+ }
+ /* Buffer and pcrs filter this if appropriate. */
+ if (!http->ssl) /* We talk plaintext */
+ {
+ content_filter = get_filter_function(csp);
+ }
/*
* 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)))
+ if (!content_filter)
{
- log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
+ /*
+ * Write the server's (modified) header to
+ * the client (along with anything else that
+ * may be in the buffer)
+ */
+
+ if (write_socket(csp->cfd, hdr, strlen(hdr))
+ || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
+ {
+ log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
+
+ /*
+ * The write failed, so don't bother mentioning it
+ * to the client... it probably can't hear us anyway.
+ */
+ freez(hdr);
+ mark_server_socket_tainted(csp);
+ return;
+ }
- /* the write failed, so don't bother
- * mentioning it to the client...
- * it probably can't hear us anyway.
+ byte_count += (unsigned long long)len;
+ }
+ else
+ {
+ /*
+ * XXX: the header lenght should probably
+ * be calculated by get_server_headers().
*/
- freez(hdr);
- return;
+ long header_length = csp->iob->cur - header_start;
+ assert(csp->iob->cur > header_start);
+ byte_count += (unsigned long long)(len - header_length);
}
- if(!content_filter) byte_count += n;
-
/* we're finished with the server's header */
freez(hdr);
server_body = 1;
- /* If this was a MS IIS/5 hack then it means
- * the server has already closed the
- * connection. Nothing more to read. Time
- * to bail.
+ /*
+ * If this was a MS IIS/5 hack then it means the server
+ * has already closed the connection. Nothing more to read.
+ * Time to bail.
*/
if (ms_iis5_hack)
{
+ log_error(LOG_LEVEL_INFO,
+ "Closed server connection detected with MS IIS5 hack enabled.");
break;
}
}
continue;
}
-
+ mark_server_socket_tainted(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);
+ if (csp->content_length == 0)
+ {
+ /*
+ * If Privoxy didn't recalculate the Content-Lenght,
+ * byte_count is still correct.
+ */
+ csp->content_length = byte_count;
+ }
+
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
+ && (csp->expected_content_length != byte_count))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Received %llu bytes while expecting %llu.",
+ byte_count, csp->expected_content_length);
+ mark_server_socket_tainted(csp);
+ }
+#endif
+
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
+ csp->ip_addr_str, http->ocmd, csp->content_length);
}
chat(csp);
close_socket(csp->cfd);
- if (csp->sfd >= 0)
+ if (csp->sfd != JB_INVALID_SOCKET)
{
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ static int monitor_thread_running = 0;
+
+ if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
+ && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
+ {
+ remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
+ privoxy_mutex_lock(&connection_reuse_mutex);
+ if (!monitor_thread_running)
+ {
+ monitor_thread_running = 1;
+ privoxy_mutex_unlock(&connection_reuse_mutex);
+ wait_for_alive_connections();
+ privoxy_mutex_lock(&connection_reuse_mutex);
+ monitor_thread_running = 0;
+ }
+ privoxy_mutex_unlock(&connection_reuse_mutex);
+ }
+ else
+ {
+ forget_connection(csp->sfd);
+ close_socket(csp->sfd);
+ }
+#else
close_socket(csp->sfd);
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
}
csp->flags &= ~CSP_FLAG_ACTIVE;
#endif
+#if !defined(_WIN32) || defined(_WIN_CONSOLE)
+/*********************************************************************
+ *
+ * Function : usage
+ *
+ * Description : Print usage info & exit.
+ *
+ * Parameters : Pointer to argv[0] for identifying ourselves
+ *
+ * Returns : No. ,-)
+ *
+ *********************************************************************/
+static void usage(const char *myname)
+{
+ printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
+ "Usage: %s "
+#if defined(unix)
+ "[--chroot] "
+#endif /* defined(unix) */
+ "[--help] "
+#if defined(unix)
+ "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
+#endif /* defined(unix) */
+ "[--version] [configfile]\n"
+ "Aborting\n", myname);
+
+ exit(2);
+
+}
+#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
+ *
+ * Description : Prepares mutexes if mutex support is available.
+ *
+ * Parameters : None
+ *
+ * Returns : Void, exits in case of errors.
+ *
+ *********************************************************************/
+static void initialize_mutexes(void)
+{
+#ifdef MUTEX_LOCKS_AVAILABLE
+ /*
+ * Prepare global mutex semaphores
+ */
+ privoxy_mutex_init(&log_mutex);
+ privoxy_mutex_init(&log_init_mutex);
+ privoxy_mutex_init(&connection_reuse_mutex);
+
+ /*
+ * XXX: The assumptions below are a bit naive
+ * and can cause locks that aren't necessary.
+ *
+ * For example older FreeBSD versions (< 6.x?)
+ * have no gethostbyname_r, but gethostbyname is
+ * thread safe.
+ */
+#if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
+ 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
+ privoxy_mutex_init(&gmtime_mutex);
+#endif /* ndef HAVE_GMTIME_R */
+
+#ifndef HAVE_LOCALTIME_R
+ privoxy_mutex_init(&localtime_mutex);
+#endif /* ndef HAVE_GMTIME_R */
+
+#ifndef HAVE_RANDOM
+ privoxy_mutex_init(&rand_mutex);
+#endif /* ndef HAVE_RANDOM */
+#endif /* def MUTEX_LOCKS_AVAILABLE */
+}
+
+
/*********************************************************************
*
* Function : main
int main(int argc, const char *argv[])
#endif
{
- int argc_pos = 1;
+ int argc_pos = 0;
+ unsigned int random_seed;
+#ifdef unix
+ struct passwd *pw = NULL;
+ struct group *grp = NULL;
+ char *p;
+ int do_chroot = 0;
+ char *pre_chroot_nslookup_to_load_resolver = NULL;
+#endif
+
+ Argc = argc;
+ Argv = argv;
+
+ configfile =
+#if !defined(_WIN32)
+ "config"
+#else
+ "config.txt"
+#endif
+ ;
+
+ /* Prepare mutexes if supported and necessary. */
+ initialize_mutexes();
+
+ /* Enable logging until further notice. */
+ init_log_module();
+
+ /*
+ * Parse the command line arguments
+ *
+ * XXX: simply printing usage information in case of
+ * invalid arguments isn't particularly user friendly.
+ */
+ 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)
+ {
+ usage(argv[0]);
+ }
+
+ else if(strcmp(argv[argc_pos], "--version") == 0)
+ {
+ 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;
+ }
+
+ else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
+ {
+ if (++argc_pos == argc) usage(argv[0]);
+ pidfile = strdup(argv[argc_pos]);
+ }
- configfile =
-#ifdef AMIGA
- "AmiTCP:db/junkbuster/config"
-#elif !defined(_WIN32)
- "config"
-#else
- "config.txt"
-#endif
- ;
+ else if (strcmp(argv[argc_pos], "--user" ) == 0)
+ {
+ if (++argc_pos == argc) usage(argv[argc_pos]);
-#if !defined(_WIN32) || defined(_WIN_CONSOLE)
- if ((argc >= 2) && (strcmp(argv[1], "--help")==0))
- {
- printf("JunkBuster proxy version " VERSION ".\n\n"
- "Usage: %s [configfile]\n\n"
- "See " HOME_PAGE_URL " for details.\n"
- "This program is distributed under the GNU GPL, version 2 or later.\n",
- argv[0]);
- exit(2);
- }
- if ((argc >= 2) && (strcmp(argv[1], "--version")==0))
- {
- 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) */
+ if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
+ {
+ *p++ = '\0';
+ if (NULL == (grp = getgrnam(p)))
+ {
+ log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
+ }
+ }
- Argc = argc;
- Argv = argv;
+ if (NULL == (pw = getpwnam(argv[argc_pos])))
+ {
+ log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
+ }
- if (argc > argc_pos )
- {
- configfile = argv[argc_pos];
- }
+ 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;
+ }
+#endif /* defined(unix) */
+
+ else if (argc_pos + 1 != argc)
+ {
+ /*
+ * This is neither the last command line
+ * option, nor was it recognized before,
+ * therefore it must be invalid.
+ */
+ usage(argv[0]);
+ }
+ else
+
+#endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
+ {
+ configfile = argv[argc_pos];
+ }
+
+ } /* -END- while (more arguments) */
+
+ show_version(Argv[0]);
#if defined(unix)
if ( *configfile != '/' )
{
+ char cwd[BUFFER_SIZE];
char *abs_file;
-
- DBG(1, ("configfile before '%s'\n",configfile) );
+ size_t abs_file_size;
/* make config-filename absolute here */
- if ( !(basedir = getcwd( NULL, 1024 )))
+ if (NULL == getcwd(cwd, sizeof(cwd)))
{
- perror("get working dir failed");
+ perror("failed to get current working directory");
exit( 1 );
}
- DBG(1, ("working dir '%s'\n",basedir) );
- if ( !(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 )))
+
+ /* XXX: why + 5? */
+ abs_file_size = strlen(cwd) + strlen(configfile) + 5;
+ basedir = strdup(cwd);
+
+ if (NULL == basedir ||
+ NULL == (abs_file = malloc(abs_file_size)))
{
perror("malloc failed");
exit( 1 );
}
- strcpy( abs_file, basedir );
- strcat( abs_file, "/" );
- strcat( abs_file, configfile );
+ strlcpy(abs_file, basedir, abs_file_size);
+ strlcat(abs_file, "/", abs_file_size );
+ strlcat(abs_file, configfile, abs_file_size);
configfile = abs_file;
- DBG(1, ("configfile after '%s'\n",configfile) );
}
#endif /* defined unix */
files->next = NULL;
+ clients->next = NULL;
+ /* XXX: factor out initialising after the next stable release. */
#ifdef AMIGA
InitAmiga();
#elif defined(_WIN32)
InitWin32();
#endif
+ random_seed = (unsigned int)time(NULL);
+#ifdef HAVE_RANDOM
+ srandom(random_seed);
+#else
+ srand(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 signals (FIXME: Why?)
+ */
+#if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
+{
+ int idx;
+ 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]);
+ }
+ }
-#if !defined(_WIN32) && !defined(__OS2__)
- signal(SIGPIPE, SIG_IGN);
- signal(SIGCHLD, SIG_IGN);
+ for (idx = 0; ignored_signals[idx] != 0; idx++)
+ {
+ if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
+ {
+ log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
+ }
+ }
+}
#else /* ifdef _WIN32 */
# ifdef _WIN_CONSOLE
/*
* We *are* in a windows console app.
* Print a verbose messages about FAQ's and such
*/
- printf(win32_blurb);
+ printf("%s", win32_blurb);
# endif /* def _WIN_CONSOLE */
#endif /* def _WIN32 */
/* Initialize the CGI subsystem */
cgi_init_error_messages();
+ /*
+ * If runnig on unix and without the --nodaemon
+ * option, become a daemon. I.e. fork, detach
+ * from tty and get process group leadership
+ */
#if defined(unix)
{
pid_t pid = 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 */
+ if (!no_daemon)
{
- 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 )
+ pid = fork();
+
+ if ( pid < 0 ) /* error */
{
- exit( 1 );
+ perror("fork");
+ exit( 3 );
}
- exit( 0 );
- }
- /* child */
+ 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();
+ /* Should be more portable, but not as well tested */
+ setsid();
#else /* !1 */
#ifdef __FreeBSD__
- setpgrp(0,0);
+ setpgrp(0,0);
#else /* ndef __FreeBSD__ */
- setpgrp();
+ setpgrp();
#endif /* ndef __FreeBSD__ */
- fd = open("/dev/tty", O_RDONLY);
- if ( fd )
+ fd = open("/dev/tty", O_RDONLY);
+ if ( fd )
+ {
+ /* no error check here */
+ ioctl( fd, TIOCNOTTY,0 );
+ close ( fd );
+ }
+#endif /* 1 */
+ /*
+ * stderr (fd 2) will be closed later on, when the
+ * log file has been parsed.
+ */
+
+ close( 0 );
+ close( 1 );
+ chdir("/");
+
+ } /* -END- if (!no_daemon) */
+
+ /*
+ * As soon as we have written the PID file, we can switch
+ * to the user and group ID indicated by the --user option
+ */
+ write_pid_file();
+
+ if (NULL != pw)
{
- /* no error check here */
- ioctl( fd, TIOCNOTTY,0 );
- close ( fd );
+ if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
+ {
+ log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
+ }
+ if (NULL != grp)
+ {
+ if (setgroups(1, &grp->gr_gid))
+ {
+ log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
+ }
+ }
+ else if (initgroups(pw->pw_name, pw->pw_gid))
+ {
+ log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
+ }
+ if (do_chroot)
+ {
+ if (!pw->pw_dir)
+ {
+ 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);
+ }
+ 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];
+
+ strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
+ if (putenv(putenv_dummy) != 0)
+ {
+ log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
+ }
+
+ snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
+ if (putenv(putenv_dummy) != 0)
+ {
+ log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
+ }
+ }
}
-#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 )
+ else if (do_chroot)
{
- close( 0 );
- close( 1 );
+ log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
}
-#else
- close( 0 );
- close( 1 );
-#endif /* _DEBUG */
- chdir("/");
-
}
#endif /* defined unix */
- DBG(1, ("call listen_loop() \n") );
+#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 */
}
+/*********************************************************************
+ *
+ * Function : bind_port_helper
+ *
+ * Description : Bind the listen port. Handles logging, and aborts
+ * on failure.
+ *
+ * Parameters :
+ * 1 : config = Privoxy configuration. Specifies port
+ * to bind to.
+ *
+ * Returns : Port that was opened.
+ *
+ *********************************************************************/
+static jb_socket bind_port_helper(struct configuration_spec * config)
+{
+ int result;
+ jb_socket bfd;
+
+ if (config->haddr == NULL)
+ {
+ log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
+ config->hport);
+ }
+ else
+ {
+ log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
+ config->hport, config->haddr);
+ }
+
+ result = bind_port(config->haddr, config->hport, &bfd);
+
+ if (result < 0)
+ {
+ switch(result)
+ {
+ case -3 :
+ log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
+ "There may be another Privoxy or some other "
+ "proxy running on port %d",
+ (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
+ config->hport, config->hport);
+
+ case -2 :
+ log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
+ "The hostname is not resolvable",
+ (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
+
+ default :
+ log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
+ (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
+ }
+
+ /* shouldn't get here */
+ return JB_INVALID_SOCKET;
+ }
+
+ config->need_bind = 0;
+
+ return bfd;
+}
+
+
+#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
static void listen_loop(void)
{
struct client_state *csp = NULL;
- int bfd;
+ jb_socket bfd;
struct configuration_spec * config;
config = load_config();
- log_error(LOG_LEVEL_CONNECT, "bind (%s, %d)",
- config->haddr ? config->haddr : "INADDR_ANY", config->hport);
-
- bfd = bind_port(config->haddr, config->hport);
-
- if (bfd < 0)
- {
- 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",
- config->hport, config->hport
- );
- /* shouldn't get here */
- return;
- }
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ /*
+ * XXX: Should be relocated once it no
+ * longer needs to emit log messages.
+ */
+ initialize_reusable_connections();
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
- config->need_bind = 0;
+ bfd = bind_port_helper(config);
- while (FOREVER)
+#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)
/* zombie children */
}
#endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
+
+ /*
+ * Free data that was used by died threads
+ */
sweep();
+#if defined(unix)
+ /*
+ * Re-open the errlog after HUP signal
+ */
+ if (received_hup_signal)
+ {
+ if (NULL != config->logfile)
+ {
+ init_error_log(Argv[0], config->logfile);
+ }
+ received_hup_signal = 0;
+ }
+#endif
+
if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
{
log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
}
csp->flags |= CSP_FLAG_ACTIVE;
- csp->sfd = -1;
+ csp->sfd = JB_INVALID_SOCKET;
csp->config = config = load_config();
close_socket(bfd);
- log_error(LOG_LEVEL_CONNECT, "bind (%s, %d)",
- config->haddr ? config->haddr : "INADDR_ANY", config->hport);
- bfd = bind_port(config->haddr, config->hport);
-
- if (bfd < 0)
- {
- 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",
- config->hport, config->hport
- );
- /* shouldn't get here */
- return;
- }
-
- config->need_bind = 0;
+ bfd = bind_port_helper(config);
}
- log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
+ log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
if (!accept_connection(csp, bfd))
{
}
else
{
- log_error(LOG_LEVEL_CONNECT, "OK");
+ log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
}
#ifdef FEATURE_TOGGLE
- if (g_bToggleIJB)
+ if (global_toggle_state)
+#endif /* def FEATURE_TOGGLE */
{
csp->flags |= CSP_FLAG_TOGGLED_ON;
}
-#endif /* def FEATURE_TOGGLE */
if (run_loader(csp))
{
#ifdef FEATURE_ACL
if (block_acl(NULL,csp))
{
- log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
+ log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
close_socket(csp->cfd);
freez(csp);
continue;
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 * (*)(void *))serve, csp);
+ child_id = errno ? -1 : 0;
pthread_attr_destroy(&attrs);
}
#endif
#if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
#define SELECTED_ONE_OPTION
child_id = _beginthread(
- (void*)serve,
+ (void (*)(void *))serve,
64 * 1024,
csp);
#endif
#if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
#define SELECTED_ONE_OPTION
child_id = _beginthread(
- serve,
+ (void(* _Optlink)(void*))serve,
NULL,
64 * 1024,
csp);
#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_StackSize, 200*1024,
- TAG_DONE)))
+
+#ifdef __amigaos4__
+ child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
+ NP_Output, Output(),
+ NP_CloseOutput, FALSE,
+ NP_Name, (ULONG)"privoxy child",
+ NP_Child, TRUE,
+ TAG_DONE);
+#else
+ child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
+ NP_Output, Output(),
+ NP_CloseOutput, FALSE,
+ NP_Name, (ULONG)"privoxy child",
+ NP_StackSize, 200*1024,
+ TAG_DONE);
+#endif
+ if(0 != child_id)
{
childs++;
((struct Task *)child_id)->tc_UserData = csp;
*/
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 */
{
* 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;
log_error(LOG_LEVEL_ERROR, "can't fork: %E");
- sprintf(buf , "JunkBuster: can't fork: errno = %d", errno);
+ snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
write_socket(csp->cfd, buf, strlen(buf));
close_socket(csp->cfd);
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);
+
+#if defined(_WIN32) && !defined(_WIN_CONSOLE)
+ /* Cleanup - remove taskbar icon etc. */
+ TermLogWindow();
+#endif
+
+ exit(0);
+#endif /* FEATURE_GRACEFUL_TERMINATION */
}
projects / privoxy.git / blobdiff