-const char jcc_rcs[] = "$Id: jcc.c,v 1.238 2009/03/27 14:42:30 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) 2001-2009 the SourceForge
- * Privoxy team. http://www.privoxy.org/
+ * Copyright : Written by and Copyright (C) 2001-2020 the
+ * Privoxy team. https://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
* by and Copyright (C) 1997 Anonymous Coders and
* or write to the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
- * Revisions :
- * $Log: jcc.c,v $
- * Revision 1.238 2009/03/27 14:42:30 fabiankeil
- * Correct the status code for CONNECTION_TIMEOUT_RESPONSE.
- *
- * Revision 1.237 2009/03/27 14:32:04 fabiankeil
- * If spawning a child in listen_loop() fails, send a real
- * HTTP response to the client and continue listening for
- * new connections without artificial delay.
- *
- * Revision 1.236 2009/03/25 17:30:24 fabiankeil
- * In serve(), keep the client socket open until we marked the
- * server socket as unused. This should increase the chances
- * that we reuse the connection for the client's next request
- * to the same destination.
- *
- * Revision 1.235 2009/03/18 21:01:20 fabiankeil
- * Comment fix. Spotted by Roland.
- *
- * Revision 1.234 2009/03/18 20:48:42 fabiankeil
- * If the --no-daemon option is used, enable LOG_LEVEL_INFO
- * before the config file has been parsed (as we always did).
- *
- * Revision 1.233 2009/03/13 14:10:07 fabiankeil
- * Fix some more harmless warnings on amd64.
- *
- * 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"
- *
- * Revision 1.57 2001/11/16 00:47:43 jongfoster
- * Changing the tty-disconnection code to use setsid().
- *
- * Revision 1.56 2001/11/13 20:20:54 jongfoster
- * Tabs->spaces, fixing a bug with missing {} around an if()
- *
- * Revision 1.55 2001/11/13 20:14:53 jongfoster
- * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
- *
- * Revision 1.54 2001/11/07 00:03:14 steudten
- * Give reliable return value if an error
- * occurs not just 0 with new daemon mode.
- *
- * Revision 1.53 2001/11/05 21:41:43 steudten
- * Add changes to be a real daemon just for unix os.
- * (change cwd to /, detach from controlling tty, set
- * process group and session leader to the own process.
- * Add DBG() Macro.
- * Add some fatal-error log message for failed malloc().
- * Add '-d' if compiled with 'configure --with-debug' to
- * enable debug output.
- *
- * Revision 1.52 2001/10/26 20:11:20 jongfoster
- * Fixing type mismatch
- *
- * Revision 1.51 2001/10/26 17:38:28 oes
- * Cosmetics
- *
- * Revision 1.50 2001/10/25 03:40:48 david__schmidt
- * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
- * threads to call select() simultaneously. So, it's time to do a real, live,
- * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
- * (native). Both versions will work, but using __OS2__ offers multi-threading.
- *
- * Revision 1.49 2001/10/23 21:41:35 jongfoster
- * Added call to initialize the (statically-allocated of course)
- * "out of memory" CGI response.
- *
- * Revision 1.48 2001/10/10 19:56:46 jongfoster
- * Moving some code that wasn't cookie-related out of an #ifdef
- * FEATURE_COOKIE_JAR
- *
- * Revision 1.47 2001/10/10 16:44:36 oes
- * Added CONNECT destination port limitation check
- *
- * Revision 1.46 2001/10/08 15:17:41 oes
- * Re-enabled SSL forwarding
- *
- * Revision 1.45 2001/10/07 15:42:11 oes
- * Replaced 6 boolean members of csp with one bitmap (csp->flags)
- *
- * Moved downgrading of the HTTP version from parse_http_request to
- * chat(), since we can't decide if it is necessary before we have
- * determined the actions for the URL. The HTTP command is now
- * *always* re-built so the repairs need no longer be special-cased.
- *
- * filter_popups now gets a csp pointer so it can raise the new
- * CSP_FLAG_MODIFIED flag.
- *
- * Bugfix
- *
- * Added configurable size limit for the IOB. If the IOB grows so
- * large that the next read would exceed the limit, the header
- * is generated, and the header & unfiltered buffer are flushed
- * to the client. Chat then continues in non-buffering,
- * non-filtering body mode.
- *
- * Revision 1.44 2001/10/02 18:13:57 oes
- * Ooops
- *
- * Revision 1.43 2001/10/02 15:32:13 oes
- * Moved generation of hdr
- *
- * Revision 1.42 2001/09/21 23:02:02 david__schmidt
- * Cleaning up 2 compiler warnings on OS/2.
- *
- * Revision 1.41 2001/09/16 17:05:14 jongfoster
- * Removing unused #include showarg.h
- *
- * Revision 1.40 2001/09/16 15:41:45 jongfoster
- * Fixing signed/unsigned comparison warning.
- *
- * Revision 1.39 2001/09/16 13:21:27 jongfoster
- * Changes to use new list functions.
- *
- * Revision 1.38 2001/09/16 13:01:46 jongfoster
- * Removing redundant function call that zeroed zalloc()'d memory.
- *
- * Revision 1.37 2001/09/10 11:12:24 oes
- * Deleted unused variable
- *
- * Revision 1.36 2001/09/10 10:56:15 oes
- * Silenced compiler warnings
- *
- * Revision 1.35 2001/07/31 14:44:22 oes
- * Deleted unused size parameter from filter_popups()
- *
- * Revision 1.34 2001/07/30 22:08:36 jongfoster
- * Tidying up #defines:
- * - All feature #defines are now of the form FEATURE_xxx
- * - Permanently turned off WIN_GUI_EDIT
- * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
- *
- * Revision 1.33 2001/07/29 19:32:00 jongfoster
- * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
- *
- * Revision 1.32 2001/07/29 18:47:05 jongfoster
- * Adding missing #include "loadcfg.h"
- *
- * Revision 1.31 2001/07/29 12:17:48 oes
- * Applied pthread fix by Paul Lieverse
- *
- * Revision 1.30 2001/07/25 22:57:13 jongfoster
- * __BEOS__ no longer overrides FEATURE_PTHREAD.
- * This is because FEATURE_PTHREAD will soon be widely used, so I
- * want to keep it simple.
- *
- * Revision 1.29 2001/07/24 12:47:06 oes
- * Applied BeOS support update by Eugenia
- *
- * Revision 1.28 2001/07/23 13:26:12 oes
- * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
- *
- * Revision 1.27 2001/07/19 19:09:47 haroon
- * - Added code to take care of the situation where while processing the first
- * server response (which includes the server header), after finding the end
- * of the headers we were not looking past the end of the headers for
- * content modification. I enabled it for filter_popups.
- * Someone else should look to see if other similar operations should be
- * done to the discarded portion of the buffer.
- *
- * Note 2001/07/20: No, the other content modification mechanisms will process
- * the whole iob later anyway. --oes
- *
- * Revision 1.26 2001/07/18 12:31:36 oes
- * cosmetics
- *
- * Revision 1.25 2001/07/15 19:43:49 jongfoster
- * Supports POSIX threads.
- * Also removed some unused #includes.
- *
- * Revision 1.24 2001/07/13 14:00:40 oes
- * - Generic content modification scheme:
- * Each feature has its own applicability flag that is set
- * from csp->action->flags.
- * Replaced the "filtering" int flag , by a function pointer
- * "content_filter" to the function that will do the content
- * modification. If it is != NULL, the document will be buffered
- * and processed through *content_filter, which must set
- * csp->content_length and return a modified copy of the body
- * or return NULL (on failiure).
- * - Changed csp->is_text to the more generic bitmap csp->content_type
- * which can currently take the valued CT_TEXT or CT_GIF
- * - Reformatting etc
- * - Removed all #ifdef PCRS
- *
- * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
- * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
- * the `block_acl' call. This prevents a compilation error when the user
- * does not wish to use the "ACL" feature.
- *
- * Revision 1.22 2001/06/29 21:45:41 oes
- * Indentation, CRLF->LF, Tab-> Space
- *
- * Revision 1.21 2001/06/29 13:29:36 oes
- * - Cleaned up, improved comments
- * - Unified all possible interceptors (CGI,
- * block, trust, fast_redirect) in one
- * place, with one (CGI) answer generation
- * mechansim. Much clearer now.
- * - Removed the GIF image generation, which
- * is now done in filters.c:block_url()
- * - Made error conditions like domain lookup
- * failiure or (various) problems while talking
- * to the server use cgi.c:error_response()
- * instead of generating HTML/HTTP in chat() (yuck!)
- * - Removed logentry from cancelled commit
- *
- * Revision 1.20 2001/06/09 10:55:28 jongfoster
- * Changing BUFSIZ ==> BUFFER_SIZE
- *
- * Revision 1.19 2001/06/07 23:12:52 jongfoster
- * Replacing function pointer in struct gateway with a directly
- * called function forwarded_connect().
- * Replacing struct gateway with struct forward_spec
- *
- * Revision 1.18 2001/06/03 19:12:16 oes
- * introduced new cgi handling
- *
- * Revision 1.17 2001/06/01 20:07:23 jongfoster
- * Now uses action +image-blocker{} rather than config->tinygif
- *
- * Revision 1.16 2001/06/01 18:49:17 jongfoster
- * Replaced "list_share" with "list" - the tiny memory gain was not
- * worth the extra complexity.
- *
- * Revision 1.15 2001/05/31 21:24:47 jongfoster
- * Changed "permission" to "action" throughout.
- * Removed DEFAULT_USER_AGENT - it must now be specified manually.
- * Moved vanilla wafer check into chat(), since we must now
- * decide whether or not to add it based on the URL.
- *
- * Revision 1.14 2001/05/29 20:14:01 joergs
- * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
- * increased.
- *
- * Revision 1.13 2001/05/29 09:50:24 jongfoster
- * Unified blocklist/imagelist/permissionslist.
- * File format is still under discussion, but the internal changes
- * are (mostly) done.
- *
- * Also modified interceptor behaviour:
- * - We now intercept all URLs beginning with one of the following
- * prefixes (and *only* these prefixes):
- * * http://i.j.b/
- * * http://ijbswa.sf.net/config/
- * * http://ijbswa.sourceforge.net/config/
- * - New interceptors "home page" - go to http://i.j.b/ to see it.
- * - Internal changes so that intercepted and fast redirect pages
- * are not replaced with an image.
- * - Interceptors now have the option to send a binary page direct
- * to the client. (i.e. ijb-send-banner uses this)
- * - Implemented show-url-info interceptor. (Which is why I needed
- * the above interceptors changes - a typical URL is
- * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
- * The previous mechanism would not have intercepted that, and
- * if it had been intercepted then it then it would have replaced
- * it with an image.)
- *
- * Revision 1.12 2001/05/27 22:17:04 oes
- *
- * - re_process_buffer no longer writes the modified buffer
- * to the client, which was very ugly. It now returns the
- * buffer, which it is then written by chat.
- *
- * - content_length now adjusts the Content-Length: header
- * for modified documents rather than crunch()ing it.
- * (Length info in csp->content_length, which is 0 for
- * unmodified documents)
- *
- * - For this to work, sed() is called twice when filtering.
- *
- * Revision 1.11 2001/05/26 17:27:53 jongfoster
- * Added support for CLF and fixed LOG_LEVEL_LOG.
- * Also did CRLF->LF fix of my previous patch.
- *
- * Revision 1.10 2001/05/26 15:26:15 jongfoster
- * ACL feature now provides more security by immediately dropping
- * connections from untrusted hosts.
- *
- * Revision 1.9 2001/05/26 00:28:36 jongfoster
- * Automatic reloading of config file.
- * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
- * Most of the global variables have been moved to a new
- * struct configuration_spec, accessed through csp->config->globalname
- * Most of the globals remaining are used by the Win32 GUI.
- *
- * Revision 1.8 2001/05/25 22:43:18 jongfoster
- * Fixing minor memory leak and buffer overflow.
- *
- * Revision 1.7 2001/05/25 22:34:30 jongfoster
- * Hard tabs->Spaces
- *
- * Revision 1.6 2001/05/23 00:13:58 joergs
- * AmigaOS support fixed.
- *
- * Revision 1.5 2001/05/22 18:46:04 oes
- *
- * - Enabled filtering banners by size rather than URL
- * by adding patterns that replace all standard banner
- * sizes with the "Junkbuster" gif to the re_filterfile
- *
- * - Enabled filtering WebBugs by providing a pattern
- * which kills all 1x1 images
- *
- * - Added support for PCRE_UNGREEDY behaviour to pcrs,
- * which is selected by the (nonstandard and therefore
- * capital) letter 'U' in the option string.
- * It causes the quantifiers to be ungreedy by default.
- * Appending a ? turns back to greedy (!).
- *
- * - Added a new interceptor ijb-send-banner, which
- * sends back the "Junkbuster" gif. Without imagelist or
- * MSIE detection support, or if tinygif = 1, or the
- * URL isn't recognized as an imageurl, a lame HTML
- * explanation is sent instead.
- *
- * - Added new feature, which permits blocking remote
- * script redirects and firing back a local redirect
- * to the browser.
- * The feature is conditionally compiled, i.e. it
- * can be disabled with --disable-fast-redirects,
- * plus it must be activated by a "fast-redirects"
- * line in the config file, has its own log level
- * and of course wants to be displayed by show-proxy-args
- * Note: Boy, all the #ifdefs in 1001 locations and
- * all the fumbling with configure.in and acconfig.h
- * were *way* more work than the feature itself :-(
- *
- * - Because a generic redirect template was needed for
- * this, tinygif = 3 now uses the same.
- *
- * - Moved GIFs, and other static HTTP response templates
- * to project.h
- *
- * - Some minor fixes
- *
- * - Removed some >400 CRs again (Jon, you really worked
- * a lot! ;-)
- *
- * Revision 1.4 2001/05/21 19:34:01 jongfoster
- * Made failure to bind() a fatal error.
- *
- * Revision 1.3 2001/05/20 01:21:20 jongfoster
- * Version 2.9.4 checkin.
- * - Merged popupfile and cookiefile, and added control over PCRS
- * filtering, in new "permissionsfile".
- * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
- * file error you now get a message box (in the Win32 GUI) rather
- * than the program exiting with no explanation.
- * - Made killpopup use the PCRS MIME-type checking and HTTP-header
- * skipping.
- * - Removed tabs from "config"
- * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
- * - Bumped up version number.
- *
- * Revision 1.2 2001/05/17 22:34:44 oes
- * - Added hint on GIF char array generation to jcc.c
- * - Cleaned CRLF's from the sources and related files
- * - Repaired logging for REF and FRC
- *
- * Revision 1.1.1.1 2001/05/15 13:58:56 oes
- * Initial import of version 2.9.3 source tree
- *
- *
*********************************************************************/
-\f
+
#include "config.h"
# ifndef STRICT
# define STRICT
# endif
+# include <winsock2.h>
# include <windows.h>
# include <process.h>
# endif /* ndef FEATURE_PTHREAD */
# ifdef __OS2__
#define INCL_DOS
# include <os2.h>
-#define bzero(B,N) memset(B,0x00,n)
# endif
+#ifdef HAVE_POLL
+#ifdef __GLIBC__
+#include <sys/poll.h>
+#else
+#include <poll.h>
+#endif /* def __GLIBC__ */
+#else
# ifndef FD_ZERO
# include <select.h>
# endif
+#warning poll() appears to be unavailable. Your platform will become unsupported in the future.
+#endif /* HAVE_POLL */
#endif
#include "project.h"
#include "list.h"
#include "jcc.h"
+#ifdef FEATURE_HTTPS_INSPECTION
+#include "ssl.h"
+#endif
#include "filters.h"
#include "loaders.h"
#include "parsers.h"
#include "cgi.h"
#include "loadcfg.h"
#include "urlmatch.h"
+#ifdef FEATURE_CLIENT_TAGS
+#include "client-tags.h"
+#endif
-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];
+int daemon_mode = 1;
+struct client_states clients[1];
struct file_list files[1];
#ifdef FEATURE_STATISTICS
int g_terminate = 0;
#endif
-#if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
+#if !defined(_WIN32) && !defined(__OS2__)
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 void send_crunch_response(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 usage(const char *myname);
#endif
static void initialize_mutexes(void);
-static jb_socket bind_port_helper(struct configuration_spec *config);
+static jb_socket bind_port_helper(const char *haddr, int hport, int backlog);
+static void bind_ports_helper(struct configuration_spec *config, jb_socket sockets[]);
+static void close_ports_helper(jb_socket sockets[]);
static void listen_loop(void);
-
-#ifdef AMIGA
-void serve(struct client_state *csp);
-#else /* ifndef AMIGA */
static void serve(struct client_state *csp);
-#endif /* def AMIGA */
#ifdef __BEOS__
static int32 server_thread(void *data);
#define sleep(N) DosSleep(((N) * 100))
#endif
+#ifdef FUZZ
+int process_fuzzed_input(char *fuzz_input_type, char *fuzz_input_file);
+void show_fuzz_usage(const char *name);
+#endif
+
#ifdef MUTEX_LOCKS_AVAILABLE
/*
* XXX: Does the locking stuff really belong in this file?
privoxy_mutex_t log_init_mutex;
privoxy_mutex_t connection_reuse_mutex;
+#ifdef FEATURE_HTTPS_INSPECTION
+privoxy_mutex_t certificate_mutex;
+privoxy_mutex_t rng_mutex;
+#endif
+
+#ifdef FEATURE_EXTERNAL_FILTERS
+privoxy_mutex_t external_filter_mutex;
+#endif
+#ifdef FEATURE_CLIENT_TAGS
+privoxy_mutex_t client_tags_mutex;
+#endif
+
#if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
privoxy_mutex_t resolver_mutex;
#endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
privoxy_mutex_t localtime_mutex;
#endif /* ndef HAVE_GMTIME_R */
-#ifndef HAVE_RANDOM
+#if !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM)
privoxy_mutex_t rand_mutex;
-#endif /* ndef HAVE_RANDOM */
+#endif /* !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM) */
#endif /* def MUTEX_LOCKS_AVAILABLE */
/* HTTP snipplets. */
static const char CSUCCEED[] =
- "HTTP/1.0 200 Connection established\r\n"
- "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
+ "HTTP/1.1 200 Connection established\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"
+ "HTTP/1.1 400 Invalid header received from client\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"
+ "HTTP/1.1 400 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"
+ "HTTP/1.1 400 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"
+ "HTTP/1.1 400 Bad request received from client\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"
+ "HTTP/1.1 502 Server or forwarder response invalid\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"
+ "HTTP/1.1 400 Malformed request after rewriting\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n"
"Bad request. Messed up with header filters.\r\n";
static const char TOO_MANY_CONNECTIONS_RESPONSE[] =
- "HTTP/1.0 503 Too many open connections\r\n"
- "Proxy-Agent: Privoxy " VERSION "\r\n"
+ "HTTP/1.1 503 Too many open connections\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n"
"Maximum number of open connections reached.\r\n";
-/* XXX: should be a template */
-static const char CONNECTION_TIMEOUT_RESPONSE[] =
- "HTTP/1.0 504 Connection timeout\r\n"
- "Proxy-Agent: Privoxy " VERSION "\r\n"
+static const char CLIENT_CONNECTION_TIMEOUT_RESPONSE[] =
+ "HTTP/1.1 504 Connection timeout\r\n"
+ "Content-Type: text/plain\r\n"
+ "Connection: close\r\n\r\n"
+ "The connection timed out because the client request didn't arrive in time.\r\n";
+
+static const char CLIENT_BODY_PARSE_ERROR_RESPONSE[] =
+ "HTTP/1.1 400 Failed reading client body\r\n"
+ "Content-Type: text/plain\r\n"
+ "Connection: close\r\n\r\n"
+ "Failed parsing or buffering the chunk-encoded client body.\r\n";
+
+static const char UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE[] =
+ "HTTP/1.1 417 Expecting too much\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n"
- "The connection timed out.\r\n";
+ "Privoxy detected an unsupported Expect header value.\r\n";
/* A function to crunch a response */
typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
*
* here?
*/
-#if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
+#if !defined(_WIN32) && !defined(__OS2__)
/*********************************************************************
*
- * Function : sig_handler
+ * Function : sig_handler
*
* Description : Signal handler for different signals.
* Exit gracefully on TERM and INT
* Parameters :
* 1 : the_signal = the signal cause this function to call
*
- * Returns : -
+ * Returns : -
*
*********************************************************************/
static void sig_handler(int the_signal)
case SIGINT:
log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
#if defined(unix)
- if(pidfile)
+ if (pidfile)
{
unlink(pidfile);
}
#if defined(unix)
received_hup_signal = 1;
#endif
- break;
+ break;
default:
- /*
+ /*
* We shouldn't be here, unless we catch signals
* in main() that we can't handle here!
*/
#endif
+/*********************************************************************
+ *
+ * Function : get_write_delay
+ *
+ * Description : Parse the delay-response parameter.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : Number of milliseconds to delay writes.
+ *
+ *********************************************************************/
+static unsigned int get_write_delay(const struct client_state *csp)
+{
+ unsigned int delay;
+ char *endptr;
+ char *newval;
+
+ if ((csp->action->flags & ACTION_DELAY_RESPONSE) == 0)
+ {
+ return 0;
+ }
+ newval = csp->action->string[ACTION_STRING_DELAY_RESPONSE];
+
+ delay = (unsigned)strtol(newval, &endptr, 0);
+ if (*endptr != '\0')
+ {
+ log_error(LOG_LEVEL_FATAL,
+ "Invalid delay-response{} parameter: '%s'", newval);
+ }
+
+ return delay;
+
+}
+
+
/*********************************************************************
*
* Function : client_protocol_is_unsupported
log_error(LOG_LEVEL_CLF,
"%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
freez(req);
- write_socket(csp->cfd, response, strlen(response));
+ write_socket_delayed(csp->cfd, response, strlen(response),
+ get_write_delay(csp));
+
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+
+/*********************************************************************
+ *
+ * Function : client_has_unsupported_expectations
+ *
+ * Description : Checks if the client used an unsupported expectation
+ * in which case an error message is delivered.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : TRUE if an error response has been generated, or
+ * FALSE if the request doesn't look invalid.
+ *
+ *********************************************************************/
+static int client_has_unsupported_expectations(const struct client_state *csp)
+{
+ if ((csp->flags & CSP_FLAG_UNSUPPORTED_CLIENT_EXPECTATION))
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Rejecting request from client %s with unsupported Expect header value",
+ csp->ip_addr_str);
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"%s\" 417 0", csp->ip_addr_str, csp->http->cmd);
+ write_socket_delayed(csp->cfd,
+ UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE,
+ strlen(UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE),
+ get_write_delay(csp));
return TRUE;
}
return FALSE;
+
}
log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
csp->ip_addr_str, csp->http->cmd);
- write_socket(csp->cfd, CHEADER, strlen(CHEADER));
+ write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER),
+ get_write_delay(csp));
destroy_list(headers);
return JB_ERR_PARSE;
}
else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
{
+#ifndef FEATURE_EXTENDED_HOST_PATTERNS
/* Split the domain we just got for pattern matching */
init_domain_components(csp->http);
+#endif
return JB_ERR_OK;
}
csp->ip_addr_str, csp->http->cmd, req);
freez(req);
- write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
+ write_socket_delayed(csp->cfd, MISSING_DESTINATION_RESPONSE,
+ strlen(MISSING_DESTINATION_RESPONSE), get_write_delay(csp));
destroy_list(headers);
return JB_ERR_PARSE;
log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
continue_hack_in_da_house = 1;
}
- else if (*header == '\0')
+ else if (*header == '\0')
{
/*
* If the header is empty, but the Continue hack
return "Internal error while searching for crunch reason";
}
- switch (rsp->reason)
+ switch (rsp->crunch_reason)
{
- case RSP_REASON_UNSUPPORTED:
+ case UNSUPPORTED:
reason = "Unsupported HTTP feature";
break;
- case RSP_REASON_BLOCKED:
+ case BLOCKED:
reason = "Blocked";
break;
- case RSP_REASON_UNTRUSTED:
+ case UNTRUSTED:
reason = "Untrusted";
break;
- case RSP_REASON_REDIRECTED:
+ case REDIRECTED:
reason = "Redirected";
break;
- case RSP_REASON_CGI_CALL:
+ case CGI_CALL:
reason = "CGI Call";
break;
- case RSP_REASON_NO_SUCH_DOMAIN:
+ case NO_SUCH_DOMAIN:
reason = "DNS failure";
break;
- case RSP_REASON_FORWARDING_FAILED:
+ case FORWARDING_FAILED:
reason = "Forwarding failed";
break;
- case RSP_REASON_CONNECT_FAILED:
+ case CONNECT_FAILED:
reason = "Connection failure";
break;
- case RSP_REASON_OUT_OF_MEMORY:
+ case OUT_OF_MEMORY:
reason = "Out of memory (may mask other reasons)";
break;
+ case CONNECTION_TIMEOUT:
+ reason = "Connection timeout";
+ break;
+ case NO_SERVER_DATA:
+ reason = "No server data received";
+ break;
default:
reason = "No reason recorded";
break;
}
+/*********************************************************************
+ *
+ * Function : log_applied_actions
+ *
+ * Description : Logs the applied actions if LOG_LEVEL_ACTIONS is
+ * enabled.
+ *
+ * Parameters :
+ * 1 : actions = Current action spec to log
+ *
+ * Returns : Nothing.
+ *
+ *********************************************************************/
+static void log_applied_actions(const struct current_action_spec *actions)
+{
+ /*
+ * The conversion to text requires lots of memory allocations so
+ * we only do the conversion if the user is actually interested.
+ */
+ if (debug_level_is_enabled(LOG_LEVEL_ACTIONS))
+ {
+ char *actions_as_text = actions_to_line_of_text(actions);
+ log_error(LOG_LEVEL_ACTIONS, "%s", actions_as_text);
+ freez(actions_as_text);
+ }
+}
+
+
/*********************************************************************
*
* Function : send_crunch_response
*
* Parameters :
* 1 : csp = Current client state (buffers, headers, etc...)
- * 1 : rsp = Fully prepared response. Will be freed on exit.
+ * 2 : 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)
+static void send_crunch_response(struct client_state *csp, struct http_response *rsp)
{
const struct http_request *http = csp->http;
char status_code[4];
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.");
+ log_error(LOG_LEVEL_FATAL, "NULL response in send_crunch_response.");
}
/*
* Extract the status code from the actual head
- * that was send to the client. It is the only
+ * that will be 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.
*
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_applied_actions(csp->action);
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);
+ /* Write the answer to the client */
+#ifdef FEATURE_HTTPS_INSPECTION
+ if (client_use_ssl(csp))
+ {
+ if ((ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *)rsp->head, rsp->head_length) < 0)
+ || (ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *)rsp->body, rsp->content_length) < 0))
+ {
+ /* There is nothing we can do about it. */
+ log_error(LOG_LEVEL_CONNECT, "Couldn't deliver the error message "
+ "for %s through client socket %d using TLS/SSL",
+ http->url, csp->cfd);
+ }
+ }
+ else
+#endif
+ {
+ if (write_socket_delayed(csp->cfd, rsp->head, rsp->head_length,
+ get_write_delay(csp))
+ || write_socket_delayed(csp->cfd, rsp->body, rsp->content_length,
+ get_write_delay(csp)))
+ {
+ /* There is nothing we can do about it. */
+ log_error(LOG_LEVEL_CONNECT,
+ "Couldn't deliver the error message for %s through client socket %d: %E",
+ http->url, csp->cfd);
+ }
+ }
+
/* 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
/*
* If CGI request crunching is disabled,
* check the CGI dispatcher out of order to
- * prevent unintentional blocks or redirects.
+ * 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);
+ csp->flags |= CSP_FLAG_CRUNCHED;
return TRUE;
}
{
/* Deliver, log and free the interception response. */
send_crunch_response(csp, rsp);
+ csp->flags |= CSP_FLAG_CRUNCHED;
#ifdef FEATURE_STATISTICS
if (c->flags & CF_COUNT_AS_REJECT)
{
{
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)
+ 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");
- }
+ http->ver = strdup_or_die("HTTP/1.0");
}
/*
*request_line = strdup(http->gpc);
string_append(request_line, " ");
- if (fwd->forward_host)
+ if (fwd->forward_host && fwd->type != FORWARD_WEBSERVER)
{
string_append(request_line, http->url);
}
struct http_request *http = csp->http;
jb_err err;
- log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
+ log_error(LOG_LEVEL_REDIRECTS, "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;
}
*/
csp->expected_content_length = 0;
content_length_known = TRUE;
+ csp->flags |= CSP_FLAG_SERVER_CONTENT_LENGTH_SET;
}
- if (csp->http->status == 304)
+ if (csp->http->status == 204 || csp->http->status == 304)
{
/*
* Expect no body. XXX: incomplete "list" of status codes?
*/
csp->expected_content_length = 0;
content_length_known = TRUE;
+ csp->flags |= CSP_FLAG_SERVER_CONTENT_LENGTH_SET;
}
return (content_length_known && ((0 == csp->expected_content_length)
}
+#ifdef FEATURE_CONNECTION_SHARING
/*********************************************************************
*
* Function : wait_for_alive_connections
* Returns : N/A
*
*********************************************************************/
-static void wait_for_alive_connections()
+static void wait_for_alive_connections(void)
{
int connections_alive = close_unusable_connections();
log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
}
-#endif /* FEATURE_CONNECTION_KEEP_ALIVE */
+#endif /* def FEATURE_CONNECTION_SHARING */
/*********************************************************************
*
- * Function : mark_server_socket_tainted
+ * Function : save_connection_destination
+ *
+ * Description : Remembers a connection for reuse later on.
+ *
+ * Parameters :
+ * 1 : sfd = Open socket to remember.
+ * 2 : http = The destination for the connection.
+ * 3 : fwd = The forwarder settings used.
+ * 4 : server_connection = storage.
+ *
+ * Returns : void
+ *
+ *********************************************************************/
+void save_connection_destination(jb_socket sfd,
+ const struct http_request *http,
+ const struct forward_spec *fwd,
+ struct reusable_connection *server_connection)
+{
+ assert(sfd != JB_INVALID_SOCKET);
+ assert(NULL != http->host);
+
+ server_connection->sfd = sfd;
+ server_connection->host = strdup_or_die(http->host);
+ server_connection->port = http->port;
+
+ assert(NULL != fwd);
+ assert(server_connection->gateway_host == NULL);
+ assert(server_connection->gateway_port == 0);
+ assert(server_connection->forwarder_type == 0);
+ assert(server_connection->forward_host == NULL);
+ assert(server_connection->forward_port == 0);
+
+ server_connection->forwarder_type = fwd->type;
+ if (NULL != fwd->gateway_host)
+ {
+ server_connection->gateway_host = strdup_or_die(fwd->gateway_host);
+ }
+ else
+ {
+ server_connection->gateway_host = NULL;
+ }
+ server_connection->gateway_port = fwd->gateway_port;
+
+ if (NULL != fwd->forward_host)
+ {
+ server_connection->forward_host = strdup_or_die(fwd->forward_host);
+ }
+ else
+ {
+ server_connection->forward_host = NULL;
+ }
+ server_connection->forward_port = fwd->forward_port;
+}
+
+
+/*********************************************************************
+ *
+ * Function : verify_request_length
+ *
+ * Description : Checks if we already got the whole client requests
+ * and sets CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ if
+ * we do.
+ *
+ * Data that doesn't belong to the current request is
+ * either thrown away to let the client retry on a clean
+ * socket, or stashed to be dealt with after the current
+ * request is served.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : void
+ *
+ *********************************************************************/
+static void verify_request_length(struct client_state *csp)
+{
+ unsigned long long buffered_request_bytes =
+ (unsigned long long)(csp->client_iob->eod - csp->client_iob->cur);
+
+ if ((csp->expected_client_content_length != 0)
+ && (buffered_request_bytes != 0))
+ {
+ if (csp->expected_client_content_length >= buffered_request_bytes)
+ {
+ csp->expected_client_content_length -= buffered_request_bytes;
+ log_error(LOG_LEVEL_CONNECT, "Reduced expected bytes to %llu "
+ "to account for the %llu ones we already got.",
+ csp->expected_client_content_length, buffered_request_bytes);
+ }
+ else
+ {
+ assert(csp->client_iob->eod > csp->client_iob->cur + csp->expected_client_content_length);
+ csp->client_iob->eod = csp->client_iob->cur + csp->expected_client_content_length;
+ log_error(LOG_LEVEL_CONNECT, "Reducing expected bytes to 0. "
+ "Marking the server socket tainted after throwing %llu bytes away.",
+ buffered_request_bytes - csp->expected_client_content_length);
+ csp->expected_client_content_length = 0;
+ csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
+ }
+
+ if (csp->expected_client_content_length == 0)
+ {
+ csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
+ }
+ }
+
+ if (!(csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ)
+ && ((csp->client_iob->cur < csp->client_iob->eod)
+ || (csp->expected_client_content_length != 0)))
+ {
+ if (strcmpic(csp->http->gpc, "GET")
+ && strcmpic(csp->http->gpc, "HEAD")
+ && strcmpic(csp->http->gpc, "TRACE")
+ && strcmpic(csp->http->gpc, "OPTIONS")
+ && strcmpic(csp->http->gpc, "DELETE"))
+ {
+ /* XXX: this is an incomplete hack */
+ csp->flags &= ~CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
+ log_error(LOG_LEVEL_CONNECT, "There better be a request body.");
+ }
+ else
+ {
+ csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
+
+ if ((csp->config->feature_flags & RUNTIME_FEATURE_TOLERATE_PIPELINING) == 0)
+ {
+ csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
+ log_error(LOG_LEVEL_CONNECT,
+ "Possible pipeline attempt detected. The connection will not "
+ "be kept alive and we will only serve the first request.");
+ /* Nuke the pipelined requests from orbit, just to be sure. */
+ clear_iob(csp->client_iob);
+ }
+ else
+ {
+ /*
+ * Keep the pipelined data around for now, we'll deal with
+ * it once we're done serving the current request.
+ */
+ csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
+ assert(csp->client_iob->eod >= csp->client_iob->cur);
+ log_error(LOG_LEVEL_CONNECT, "Complete client request followed by "
+ "%d bytes of pipelined data received.",
+ (int)(csp->client_iob->eod - csp->client_iob->cur));
+ }
+ }
+ }
+ else
+ {
+ csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
+ log_error(LOG_LEVEL_CONNECT, "Complete client request received.");
+ }
+}
+#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
*********************************************************************/
static void mark_server_socket_tainted(struct client_state *csp)
{
- if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
+ /*
+ * For consistency we always mark the server socket
+ * tainted, however, to reduce the log noise we only
+ * emit a log message if the server socket could have
+ * actually been reused.
+ */
+ if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
+ && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED))
{
- log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
- csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
+ log_error(LOG_LEVEL_CONNECT,
+ "Marking the server socket %d tainted.",
+ csp->server_connection.sfd);
}
+ csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
}
/*********************************************************************
memset(buf, 0, sizeof(buf));
+ if ((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) != 0)
+ {
+ /*
+ * If there are multiple pipelined requests waiting,
+ * the flag will be set again once the next request
+ * has been parsed.
+ */
+ csp->flags &= ~CSP_FLAG_PIPELINED_REQUEST_WAITING;
+
+ request_line = get_header(csp->client_iob);
+ if ((NULL != request_line) && ('\0' != *request_line))
+ {
+ return request_line;
+ }
+ else
+ {
+ log_error(LOG_LEVEL_CONNECT, "No complete request line "
+ "received yet. Continuing reading from %d.", csp->cfd);
+ }
+ }
+
do
{
- if (!data_is_available(csp->cfd, csp->config->socket_timeout))
+ if (
+#ifdef FUZZ
+ 0 == (csp->flags & CSP_FLAG_FUZZED_INPUT) &&
+#endif
+ !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));
+ if (socket_is_still_alive(csp->cfd))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "No request line on socket %d received in time. Timeout: %d.",
+ csp->cfd, csp->config->socket_timeout);
+ write_socket_delayed(csp->cfd, CLIENT_CONNECTION_TIMEOUT_RESPONSE,
+ strlen(CLIENT_CONNECTION_TIMEOUT_RESPONSE),
+ get_write_delay(csp));
+ }
+ else
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "The client side of the connection on socket %d got "
+ "closed without sending a complete request line.", csp->cfd);
+ }
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))
+ if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
{
return NULL;
}
- request_line = get_header(csp->iob);
+ request_line = get_header(csp->client_iob);
} while ((NULL != request_line) && ('\0' == *request_line));
}
+enum chunk_status
+{
+ CHUNK_STATUS_MISSING_DATA,
+ CHUNK_STATUS_BODY_COMPLETE,
+ CHUNK_STATUS_PARSE_ERROR
+};
+
/*********************************************************************
*
- * Function : receive_client_request
+ * Function : chunked_body_is_complete
*
- * Description : Read the client's request (more precisely the
- * client headers) and answer it if necessary.
+ * Description : Figures out whether or not a chunked body is complete.
*
- * Note that since we're not using select() we could get
- * blocked here if a client connected, then didn't say
- * anything!
+ * Currently it always starts at the beginning of the
+ * buffer which is somewhat wasteful and prevents Privoxy
+ * from starting to forward the correctly parsed chunks
+ * as soon as theoretically possible.
+ *
+ * Should be modified to work with a common buffer,
+ * and allow the caller to skip already parsed chunks.
+ *
+ * This would allow the function to be used for unbuffered
+ * response bodies as well.
*
* Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
+ * 1 : iob = Buffer with the body to check.
+ * 2 : length = Length of complete body
*
- * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
+ * Returns : Enum with the result of the check.
*
*********************************************************************/
-static jb_err receive_client_request(struct client_state *csp)
+static enum chunk_status chunked_body_is_complete(struct iob *iob, size_t *length)
{
- char buf[BUFFER_SIZE];
- char *p;
- char *req = NULL;
- struct http_request *http;
- int len;
- jb_err err;
-
- /* Temporary copy of the client's headers before they get enlisted in csp->headers */
- struct list header_list;
- struct list *headers = &header_list;
-
- http = csp->http;
-
- memset(buf, 0, sizeof(buf));
-
- 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;
- }
+ unsigned int chunksize;
+ char *p = iob->cur;
-#ifdef FEATURE_FORCE_LOAD
- /*
- * If this request contains the FORCE_PREFIX and blocks
- * aren't enforced, get rid of it and set the force flag.
- */
- if (strstr(req, FORCE_PREFIX))
+ do
{
- if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
+ /*
+ * We need at least a single digit, followed by "\r\n",
+ * followed by an unknown amount of data, followed by "\r\n".
+ */
+ if (p + 5 > iob->eod)
{
- log_error(LOG_LEVEL_FORCE,
- "Ignored force prefix in request: \"%s\".", req);
+ return CHUNK_STATUS_MISSING_DATA;
}
- else
+ if (sscanf(p, "%x", &chunksize) != 1)
{
- strclean(req, FORCE_PREFIX);
- log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
- csp->flags |= CSP_FLAG_FORCED;
+ return CHUNK_STATUS_PARSE_ERROR;
}
- }
-#endif /* def FEATURE_FORCE_LOAD */
-
- 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;
- }
-
- /* grab the rest of the client's headers */
- init_list(headers);
- for (;;)
- {
- p = get_header(csp->iob);
- if (p == NULL)
+ /*
+ * We want at least a single digit, followed by "\r\n",
+ * followed by the specified amount of data, followed by "\r\n".
+ */
+ if (p + chunksize + 5 > iob->eod)
{
- /* There are no additional headers to read. */
- break;
+ return CHUNK_STATUS_MISSING_DATA;
}
- 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
+ /* Skip chunk-size. */
+ p = strstr(p, "\r\n");
+ if (NULL == p)
{
- /*
- * We were able to read a complete
- * header and can finaly enlist it.
- */
- enlist(headers, p);
- freez(p);
+ return CHUNK_STATUS_PARSE_ERROR;
}
- }
+ /* Move beyond the chunkdata. */
+ p += 2 + chunksize;
- 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 (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
+ /* There should be another "\r\n" to skip */
+ if (memcmp(p, "\r\n", 2))
{
- /*
- * 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;
+ return CHUNK_STATUS_PARSE_ERROR;
}
- }
-
- /*
- * 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);
- }
-
- /*
- * 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);
+ p += 2;
+ } while (chunksize > 0U);
- /* Append the previously read headers */
- list_append_list_unique(csp->headers, headers);
- destroy_list(headers);
+ *length = (size_t)(p - iob->cur);
+ assert(*length <= (size_t)(iob->eod - iob->cur));
+ assert(p <= iob->eod);
- return JB_ERR_OK;
+ return CHUNK_STATUS_BODY_COMPLETE;
}
/*********************************************************************
*
- * Function : parse_client_request
- *
- * Description : Parses the client's request and decides what to do
- * with it.
+ * Function : receive_chunked_client_request_body
*
- * Note that since we're not using select() we could get
- * blocked here if a client connected, then didn't say
- * anything!
+ * Description : Read the chunk-encoded client request body.
+ * Failures are dealt with.
*
* 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)
+static jb_err receive_chunked_client_request_body(struct client_state *csp)
{
- struct http_request *http = csp->http;
- jb_err err;
+ size_t body_length;
+ enum chunk_status status;
- err = sed(csp, FILTER_CLIENT_HEADERS);
- if (JB_ERR_OK != err)
+ while (CHUNK_STATUS_MISSING_DATA ==
+ (status = chunked_body_is_complete(csp->client_iob, &body_length)))
{
- /* 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;
+ char buf[BUFFER_SIZE];
+ int len;
- /* 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))))
+ if (!data_is_available(csp->cfd, csp->config->socket_timeout))
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Timeout while waiting for the client body.");
+ break;
+ }
+ len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
+ if (len <= 0)
+ {
+ log_error(LOG_LEVEL_ERROR, "Read the client body failed: %E");
+ break;
+ }
+ if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
+ {
+ break;
+ }
+ }
+ if (status != CHUNK_STATUS_BODY_COMPLETE)
{
- /*
- * 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 */
+ write_socket_delayed(csp->cfd, CLIENT_BODY_PARSE_ERROR_RESPONSE,
+ strlen(CLIENT_BODY_PARSE_ERROR_RESPONSE), get_write_delay(csp));
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);
-
+ "%s - - [%T] \"Failed reading chunked client body\" 400 0", csp->ip_addr_str);
return JB_ERR_PARSE;
}
+ log_error(LOG_LEVEL_CONNECT,
+ "Chunked client body completely read. Length: %d", body_length);
+ csp->expected_client_content_length = body_length;
return JB_ERR_OK;
}
+#ifdef FUZZ
/*********************************************************************
*
- * 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.
+ * Function : fuzz_chunked_transfer_encoding
*
- * FIXME: chat is nearly thousand lines long.
- * Ridiculous.
+ * Description : Treat the fuzzed input as chunked transfer encoding
+ * to check and dechunk.
*
* Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
+ * 1 : csp = Used to store the data.
+ * 2 : fuzz_input_file = File to read the input from.
*
- * Returns : Nothing.
+ * Returns : Result of dechunking
*
*********************************************************************/
-static void chat(struct client_state *csp)
+extern int fuzz_chunked_transfer_encoding(struct client_state *csp, char *fuzz_input_file)
{
- 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) */
+ size_t length;
+ size_t size = (size_t)(csp->iob->eod - csp->iob->cur);
+ enum chunk_status status;
- /* Function that does the content filtering for the current request */
- filter_function_ptr content_filter = NULL;
+ status = chunked_body_is_complete(csp->iob, &length);
+ if (CHUNK_STATUS_BODY_COMPLETE != status)
+ {
+ log_error(LOG_LEVEL_INFO, "Chunked body is incomplete or invalid");
+ }
- /* Skeleton for HTTP response, if we should intercept the request */
- struct http_response *rsp;
- struct timeval timeout;
+ return (JB_ERR_OK == remove_chunked_transfer_coding(csp->iob->cur, &size));
- memset(buf, 0, sizeof(buf));
+}
- http = csp->http;
- if (receive_client_request(csp) != JB_ERR_OK)
+/*********************************************************************
+ *
+ * Function : fuzz_client_request
+ *
+ * Description : Try to get a client request from the fuzzed input.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : fuzz_input_file = File to read the input from.
+ *
+ * Returns : Result of fuzzing.
+ *
+ *********************************************************************/
+extern int fuzz_client_request(struct client_state *csp, char *fuzz_input_file)
+{
+ jb_err err;
+
+ csp->cfd = 0;
+ csp->ip_addr_str = "fuzzer";
+
+ if (strcmp(fuzz_input_file, "-") != 0)
{
- return;
+ log_error(LOG_LEVEL_FATAL,
+ "Fuzzed client requests can currenty only be read from stdin (-).");
}
- if (parse_client_request(csp) != JB_ERR_OK)
+ err = receive_client_request(csp);
+ if (err != JB_ERR_OK)
{
- return;
+ return 1;
}
-
- /* decide how to route the HTTP request */
- fwd = forward_url(csp, http);
- if (NULL == fwd)
+ err = parse_client_request(csp);
+ if (err != JB_ERR_OK)
{
- log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
- /* Never get here - LOG_LEVEL_FATAL causes program exit */
- return;
+ return 1;
}
- /*
- * 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
- * HTTP request that has either the path component
- * without the http://domainspec (w/path) or the
- * full orininal URL (w/url)
- * Note that the path and/or the HTTP version may
- * have been altered by now.
- *
- * connect = Open a socket to the host:port of the server
- * and short-circuit server and client socket.
- *
- * pass = Pass the request unchanged if forwarding a CONNECT
- * request to a parent proxy. Note that we'll be sending
- * the CFAIL message ourselves if connecting to the parent
- * fails, but we won't send a CSUCCEED message if it works,
- * since that would result in a double message (ours and the
- * parent's). After sending the request to the parent, we simply
- * tunnel.
- *
- * here's the matrix:
- * SSL
- * 0 1
- * +--------+--------+
- * | | |
- * 0 | create | connect|
- * | w/path | |
- * Forwarding +--------+--------+
- * | | |
- * 1 | create | pass |
- * | w/url | |
- * +--------+--------+
- *
- */
+ return 0;
- if (http->ssl && connect_port_is_forbidden(csp))
+}
+#endif /* def FUZZ */
+
+
+#ifdef FEATURE_FORCE_LOAD
+/*********************************************************************
+ *
+ * Function : force_required
+ *
+ * Description : Checks a request line to see if it contains
+ * the FORCE_PREFIX. If it does, it is removed
+ * unless enforcing requests has beend disabled.
+ *
+ * Parameters :
+ * 1 : request_line = HTTP request line
+ *
+ * Returns : TRUE if force is required, FALSE otherwise.
+ *
+ *********************************************************************/
+static int force_required(const struct client_state *csp, char *request_line)
+{
+ char *p;
+
+ p = strstr(request_line, "http://");
+ if (p != NULL)
{
- 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;
+ /* Skip protocol */
+ p += strlen("http://");
}
-
- if (http->ssl == 0)
+ else
{
- freez(csp->headers->first->str);
- build_request_line(csp, fwd, &csp->headers->first->str);
+ /* Intercepted request usually don't specify the protocol. */
+ p = request_line;
}
- /*
- * We have a request. Check if one of the crunchers wants it.
- */
- if (crunch_response_triggered(csp, crunchers_all))
+ /* Go to the beginning of the path */
+ p = strstr(p, "/");
+ if (p == NULL)
{
/*
- * Yes. The client got the crunch response
- * and we are done here after cleaning up.
+ * If the path is missing the request line is invalid and we
+ * are done here. The client-visible rejection happens later on.
*/
- /* XXX: why list_remove_all()? */
- list_remove_all(csp->headers);
+ return 0;
+ }
- return;
+ if (0 == strncmpic(p, FORCE_PREFIX, strlen(FORCE_PREFIX) - 1))
+ {
+ if (!(csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS))
+ {
+ /* XXX: Should clean more carefully */
+ strclean(request_line, FORCE_PREFIX);
+ log_error(LOG_LEVEL_FORCE,
+ "Enforcing request: \"%s\".", request_line);
+
+ return 1;
+ }
+ log_error(LOG_LEVEL_FORCE,
+ "Ignored force prefix in request: \"%s\".", request_line);
}
- log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
+ return 0;
- if (fwd->forward_host)
+}
+#endif /* def FEATURE_FORCE_LOAD */
+
+
+/*********************************************************************
+ *
+ * Function : receive_client_request
+ *
+ * Description : Read the client's request (more precisely the
+ * client headers) and answer it if necessary.
+ *
+ * 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;
+ int len;
+ jb_err err;
+
+ /* Temporary copy of the client's headers before they get enlisted in csp->headers */
+ struct list header_list;
+ struct list *headers = &header_list;
+
+ /* We don't care if the arriving data is a valid HTTP request or not. */
+ csp->requests_received_total++;
+
+ http = csp->http;
+
+ memset(buf, 0, sizeof(buf));
+
+ req = get_request_line(csp);
+ if (req == NULL)
{
- log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
- fwd->forward_host, fwd->forward_port, http->hostport);
+ mark_server_socket_tainted(csp);
+ return JB_ERR_PARSE;
}
- else
+ assert(*req != '\0');
+
+ if (client_protocol_is_unsupported(csp, req))
{
- log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
+ return JB_ERR_PARSE;
}
- /* here we connect to the server, gateway, or the forwarder */
+#ifdef FEATURE_FORCE_LOAD
+ if (force_required(csp, req))
+ {
+ csp->flags |= CSP_FLAG_FORCED;
+ }
+#endif /* def FEATURE_FORCE_LOAD */
- while ((csp->sfd = forwarded_connect(fwd, http, csp))
- && (errno == EINVAL)
- && (forwarded_connect_retries++ < max_forwarded_connect_retries))
+ err = parse_http_request(req, http);
+ freez(req);
+ if (JB_ERR_OK != err)
{
+ write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER),
+ get_write_delay(csp));
+ /* XXX: Use correct size */
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
log_error(LOG_LEVEL_ERROR,
- "failed request #%u to connect to %s. Trying again.",
- forwarded_connect_retries, http->hostport);
+ "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;
}
- if (csp->sfd == JB_INVALID_SOCKET)
+ /* grab the rest of the client's headers */
+ init_list(headers);
+ for (;;)
{
- 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);
- }
- else
- {
- rsp = error_response(csp, "connect-failed", errno);
- log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
- http->hostport);
- }
+ p = get_header(csp->client_iob);
- /* Write the answer to the client */
- if (rsp != NULL)
+ if (p == NULL)
{
- send_crunch_response(csp, rsp);
+ /* There are no additional headers to read. */
+ break;
}
- return;
- }
-
- 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
- * (along with anything else that may be in the buffer)
- */
- if (write_socket(csp->sfd, hdr, strlen(hdr))
- || (flush_socket(csp->sfd, csp->iob) < 0))
+ if (*p == '\0')
{
- log_error(LOG_LEVEL_CONNECT,
- "write header to: %s failed: %E", http->hostport);
+ /*
+ * 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.");
+ destroy_list(headers);
+ return JB_ERR_PARSE;
+ }
- rsp = error_response(csp, "connect-failed", errno);
- if (rsp)
+ len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
+ if (len <= 0)
{
- send_crunch_response(csp, rsp);
+ log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
+ destroy_list(headers);
+ return JB_ERR_PARSE;
}
- freez(hdr);
- return;
+ if (add_to_iob(csp->client_iob, csp->config->buffer_limit, 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
- {
+ else
+ {
+ if (!strncmpic(p, "Transfer-Encoding:", 18))
+ {
+ /*
+ * XXX: should be called through sed()
+ * but currently can't.
+ */
+ client_transfer_encoding(csp, &p);
+ }
+ /*
+ * We were able to read a complete
+ * header and can finally enlist it.
+ */
+ enlist(headers, p);
+ freez(p);
+ }
+ }
+
+ if (http->host == NULL)
+ {
/*
- * We're running an SSL tunnel and we're not forwarding,
- * so just send the "connect succeeded" message to the
- * client, flush the rest, and get out of the way.
+ * If we still don't know the request destination,
+ * the request is invalid or the client uses
+ * Privoxy without its knowledge.
*/
- if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
+ if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
{
- freez(hdr);
- return;
+ /*
+ * 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;
}
- IOB_RESET(csp);
}
- log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
+#ifdef FEATURE_CLIENT_TAGS
+ /* XXX: If the headers were enlisted sooner, passing csp would do. */
+ set_client_address(csp, headers);
+ get_tag_list_for_client(csp->client_tags, csp->client_address);
+#endif
- /* we're finished with the client's header */
- freez(hdr);
+ /*
+ * 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);
+ }
+
+ enlist(csp->headers, http->cmd);
- maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
+ /* Append the previously read headers */
+ err = list_append_list_unique(csp->headers, headers);
+ destroy_list(headers);
- /* pass data between the client and server
- * until one or the other shuts down the connection.
- */
+ return err;
- server_body = 0;
+}
- for (;;)
+
+/*********************************************************************
+ *
+ * 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;
+
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
+ && (!strcmpic(csp->http->ver, "HTTP/1.1"))
+ && (csp->http->ssl == 0))
+ {
+ /* Assume persistence until further notice */
+ csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
+ }
+
+ if (csp->http->ssl == 0)
{
-#ifdef __OS2__
/*
- * FD_ZERO here seems to point to an errant macro which crashes.
- * So do this by hand for now...
+ * This whole block belongs to chat() but currently
+ * has to be executed before sed().
*/
- memset(&rfds,0x00,sizeof(fd_set));
-#else
- FD_ZERO(&rfds);
-#endif
- FD_SET(csp->cfd, &rfds);
- FD_SET(csp->sfd, &rfds);
-
-#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))
+ if (csp->flags & CSP_FLAG_CHUNKED_CLIENT_BODY)
{
- 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 (receive_chunked_client_request_body(csp) != JB_ERR_OK)
+ {
+ return JB_ERR_PARSE;
+ }
}
- if (server_body && server_response_is_complete(csp, byte_count))
+ else
{
- 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;
+ csp->expected_client_content_length = get_expected_content_length(csp->headers);
}
-#endif /* FEATURE_CONNECTION_KEEP_ALIVE */
+ verify_request_length(csp);
+ }
+ else
+ {
+ csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
+ }
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
+
+ err = sed(csp, FILTER_CLIENT_HEADERS);
+ if (JB_ERR_OK != err)
+ {
+ log_error(LOG_LEVEL_ERROR, "Failed to parse client request from %s.",
+ csp->ip_addr_str);
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
+ csp->ip_addr_str, csp->http->cmd);
+ write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER), get_write_delay(csp));
+ return JB_ERR_PARSE;
+ }
+ csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
+
+ /* 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))))
+ {
+ /*
+ * A header filter broke the request line - bail out.
+ */
+ write_socket_delayed(csp->cfd, MESSED_UP_REQUEST_RESPONSE,
+ strlen(MESSED_UP_REQUEST_RESPONSE), get_write_delay(csp));
+ /* 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;
+ }
+
+ if (client_has_unsupported_expectations(csp))
+ {
+ return JB_ERR_PARSE;
+ }
+
+ return JB_ERR_OK;
+
+}
+
+
+/*********************************************************************
+ *
+ * Function : send_http_request
+ *
+ * Description : Sends the HTTP headers from the client request
+ * and all the body data that has already been received.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : 0 on success, anything else is an error.
+ *
+ *********************************************************************/
+static int send_http_request(struct client_state *csp)
+{
+ char *hdr;
+ int write_failure;
+
+ 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);
+
+ /*
+ * Write the client's (modified) header to the server
+ * (along with anything else that may be in the buffer)
+ */
+ write_failure = 0 != write_socket(csp->server_connection.sfd, hdr, strlen(hdr));
+ freez(hdr);
+
+ if (write_failure)
+ {
+ log_error(LOG_LEVEL_CONNECT, "Failed sending request headers to: %s: %E",
+ csp->http->hostport);
+ }
+ else if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) == 0)
+ && (flush_iob(csp->server_connection.sfd, csp->client_iob, 0) < 0))
+ {
+ write_failure = 1;
+ log_error(LOG_LEVEL_CONNECT, "Failed sending request body to: %s: %E",
+ csp->http->hostport);
+ }
+
+ return write_failure;
+
+}
+
+
+#ifdef FEATURE_HTTPS_INSPECTION
+/*********************************************************************
+ *
+ * Function : receive_and_send_encrypted_post_data
+ *
+ * Description : Reads remaining POST data from the client and sends
+ * it to the server.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : 0 on success, anything else is an error.
+ *
+ *********************************************************************/
+static jb_err receive_and_send_encrypted_post_data(struct client_state *csp)
+{
+ int content_length_known = csp->expected_client_content_length != 0;
- timeout.tv_sec = csp->config->socket_timeout;
- timeout.tv_usec = 0;
- n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
+ while (is_ssl_pending(&(csp->mbedtls_client_attr.ssl)))
+ {
+ unsigned char buf[BUFFER_SIZE];
+ int len;
+ int max_bytes_to_read = sizeof(buf);
- if (n == 0)
+ if (content_length_known && csp->expected_client_content_length < sizeof(buf))
{
- 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;
+ max_bytes_to_read = (int)csp->expected_client_content_length;
}
- else if (n < 0)
+ log_error(LOG_LEVEL_CONNECT,
+ "Waiting for up to %d bytes of POST data from the client.",
+ max_bytes_to_read);
+ len = ssl_recv_data(&(csp->mbedtls_client_attr.ssl), buf,
+ (unsigned)max_bytes_to_read);
+ if (len == -1)
{
- log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
- mark_server_socket_tainted(csp);
- return;
+ return 1;
}
-
- /*
- * This is the body of the browser's request,
- * just read and write it.
- */
- if (FD_ISSET(csp->cfd, &rfds))
+ if (len == 0)
{
- len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
-
- if (len <= 0)
+ /* XXX: Does this actually happen? */
+ break;
+ }
+ log_error(LOG_LEVEL_HEADER, "Forwarding %d bytes of encrypted POST data",
+ len);
+ len = ssl_send_data(&(csp->mbedtls_server_attr.ssl), buf, (size_t)len);
+ if (len == -1)
+ {
+ return 1;
+ }
+ if (csp->expected_client_content_length != 0)
+ {
+ if (csp->expected_client_content_length >= len)
{
- /* XXX: not sure if this is necessary. */
- mark_server_socket_tainted(csp);
- break; /* "game over, man" */
+ csp->expected_client_content_length -= (unsigned)len;
}
-
- if (write_socket(csp->sfd, buf, (size_t)len))
+ if (csp->expected_client_content_length == 0)
{
- log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
- mark_server_socket_tainted(csp);
- return;
+ log_error(LOG_LEVEL_HEADER, "Forwarded the last %d bytes", len);
+ break;
}
- continue;
}
+ }
- /*
- * 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);
- len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
+ log_error(LOG_LEVEL_HEADER, "Done forwarding encrypted POST data");
- if (len < 0)
- {
- log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
+ return 0;
- 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;
- }
- /*
- * XXX: Consider handling the cases above the same.
- */
- mark_server_socket_tainted(csp);
- len = 0;
- }
+}
-#ifdef FEATURE_CONNECTION_KEEP_ALIVE
- if (csp->flags & CSP_FLAG_CHUNKED)
+
+/*********************************************************************
+ *
+ * Function : send_https_request
+ *
+ * Description : Sends the HTTP headers from the client request
+ * and all the body data that has already been received.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : 0 on success, anything else is an error.
+ *
+ *********************************************************************/
+static int send_https_request(struct client_state *csp)
+{
+ char *hdr;
+ int ret;
+ long flushed = 0;
+
+ hdr = list_to_text(csp->https_headers);
+ if (hdr == NULL)
+ {
+ /* FIXME Should handle error properly */
+ log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
+ }
+ list_remove_all(csp->https_headers);
+
+ /*
+ * Write the client's (modified) header to the server
+ * (along with anything else that may be in the buffer)
+ */
+ ret = ssl_send_data(&(csp->mbedtls_server_attr.ssl),
+ (const unsigned char *)hdr, strlen(hdr));
+ freez(hdr);
+
+ if (ret < 0)
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Failed sending encrypted request headers to: %s: %E",
+ csp->http->hostport);
+ mark_server_socket_tainted(csp);
+ close_client_and_server_ssl_connections(csp);
+ return 1;
+ }
+
+ if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) == 0)
+ && ((flushed = ssl_flush_socket(&(csp->mbedtls_server_attr.ssl),
+ csp->client_iob)) < 0))
+ {
+ log_error(LOG_LEVEL_CONNECT, "Failed sending request body to: %s: %E",
+ csp->http->hostport);
+ return 1;
+ }
+ if (flushed != 0)
+ {
+ if (csp->expected_client_content_length != 0)
+ {
+ if (csp->expected_client_content_length < flushed)
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Flushed %d bytes of request body while only expecting %llu",
+ flushed, csp->expected_client_content_length);
+ csp->expected_client_content_length = 0;
+ }
+ else
{
- if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
+ log_error(LOG_LEVEL_CONNECT,
+ "Flushed %d bytes of request body while expecting %llu",
+ flushed, csp->expected_client_content_length);
+ csp->expected_client_content_length -= (unsigned)flushed;
+ if (receive_and_send_encrypted_post_data(csp))
{
- /* 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;
+ return 1;
}
}
- reading_done:
-#endif /* FEATURE_CONNECTION_KEEP_ALIVE */
+ }
+ else
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Flushed %d bytes of request body", flushed);
+ }
+ }
- /*
- * 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';
+ log_error(LOG_LEVEL_CONNECT, "Encrypted request sent");
- /*
- * 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
- * prevents it from sending the trailing \r\n in
- * a 302 redirect header (and possibly other headers).
- * To work around this if we've haven't parsed
- * a full header we'll append a trailing \r\n
- * and see if this now generates a valid one.
- *
- * This hack shouldn't have any impacts. If we've
- * already transmitted the header or if this is a
- * SSL connection, then we won't bother with this
- * hack. So we only work on partially received
- * headers. If we append a \r\n and this still
- * doesn't generate a valid header, then we won't
- * transmit anything to the client.
- */
- if (len == 0)
- {
+ return 0;
- if (server_body || http->ssl)
- {
- /*
- * If we have been buffering up the document,
- * now is the time to apply content modification
- * and send the result to the client.
- */
- if (content_filter)
- {
- p = 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)
- {
- csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
- }
+}
- 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");
- }
+/*********************************************************************
+ *
+ * Function : receive_encrypted_request
+ *
+ * Description : Receives an encrypted request.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : JB_ERR_OK on success,
+ * JB_ERR_PARSE or JB_ERR_MEMORY otherwise
+ *
+ *********************************************************************/
+static jb_err receive_encrypted_request(struct client_state *csp)
+{
+ char buf[BUFFER_SIZE];
+ int len;
+ char *p;
- 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;
- }
+ do
+ {
+ log_error(LOG_LEVEL_HEADER, "Reading encrypted headers");
+ if (!data_is_available(csp->cfd, (int)csp->config->keep_alive_timeout))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Socket %d timed out while waiting for client headers", csp->cfd);
+ return JB_ERR_PARSE;
+ }
+ len = ssl_recv_data(&(csp->mbedtls_client_attr.ssl),
+ (unsigned char *)buf, sizeof(buf));
+ if (len == -1)
+ {
+ return JB_ERR_PARSE;
+ }
+ if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
+ {
+ return JB_ERR_MEMORY;
+ }
+ p = strstr(csp->client_iob->cur, "\r\n\r\n");
+ } while (p == NULL);
- freez(hdr);
- freez(p);
- }
+ log_error(LOG_LEVEL_HEADER, "Encrypted headers received completely");
- break; /* "game over, man" */
- }
+ return JB_ERR_OK;
+}
- /*
- * This is NOT the body, so
- * Let's pretend the server just sent us a blank line.
- */
- snprintf(buf, sizeof(buf), "\r\n");
- len = (int)strlen(buf);
- /*
- * Now, let the normal header parsing algorithm below do its
- * job. If it fails, we'll exit instead of continuing.
- */
+/*********************************************************************
+ *
+ * Function : process_encrypted_request
+ *
+ * Description : Receives and parses an encrypted request.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : JB_ERR_OK on success,
+ * JB_ERR_PARSE or JB_ERR_MEMORY otherwise
+ *
+ *********************************************************************/
+static jb_err process_encrypted_request(struct client_state *csp)
+{
+ char *p;
+ char *request_line;
+ jb_err err;
+ /* Temporary copy of the client's headers before they get enlisted in csp->https_headers */
+ struct list header_list;
+ struct list *headers = &header_list;
- ms_iis5_hack = 1;
- }
+ err = receive_encrypted_request(csp);
+ if (err != JB_ERR_OK)
+ {
+ /* XXX: Also used for JB_ERR_MEMORY */
+ ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *)CHEADER, strlen(CHEADER));
+ return err;
+ }
- /*
- * If this is an SSL connection or we're in the body
- * 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)
- {
- /*
- * 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 (add_to_iob(csp, buf, len))
- {
- size_t hdrlen;
- long flushed;
+ /* We don't need get_request_line() because the whole HTTP head is buffered. */
+ request_line = get_header(csp->client_iob);
+ if (request_line == NULL)
+ {
+ ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *)CHEADER, strlen(CHEADER));
+ return JB_ERR_PARSE;
+ }
+ assert(*request_line != '\0');
- log_error(LOG_LEVEL_INFO,
- "Flushing header and buffers. Stepping back from filtering.");
+ if (client_protocol_is_unsupported(csp, request_line))
+ {
+ ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *)CHEADER, strlen(CHEADER));
+ return JB_ERR_PARSE;
+ }
- hdr = list_to_text(csp->headers);
- if (hdr == NULL)
- {
- /*
- * 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);
+#ifdef FEATURE_FORCE_LOAD
+ if (force_required(csp, request_line))
+ {
+ csp->flags |= CSP_FLAG_FORCED;
+ }
+#endif /* def FEATURE_FORCE_LOAD */
- 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;
- }
+ free_http_request(csp->http);
- /*
- * 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);
- content_filter = NULL;
- server_body = 1;
- }
- }
- else
- {
- 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 += (unsigned long long)len;
- continue;
+ err = parse_http_request(request_line, csp->http);
+ /* XXX: Restore ssl setting. This is ugly */
+ csp->http->client_ssl = 1;
+ csp->http->server_ssl = 1;
+
+ freez(request_line);
+ if (JB_ERR_OK != err)
+ {
+ ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *)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(csp->http);
+ return JB_ERR_PARSE;
+ }
+
+ /* Parse the rest of the client's headers. */
+ init_list(headers);
+ for (;;)
+ {
+ p = get_header(csp->client_iob);
+
+ if (p == NULL)
+ {
+ /* There are no additional headers to read. */
+ break;
+ }
+ enlist(headers, p);
+ freez(p);
+ }
+
+ if (JB_ERR_OK != get_destination_from_https_headers(headers, csp->http))
+ {
+ /*
+ * Our attempts to get the request destination
+ * elsewhere failed.
+ */
+ ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *)CHEADER, strlen(CHEADER));
+ return JB_ERR_PARSE;
+ }
+
+#ifndef FEATURE_EXTENDED_HOST_PATTERNS
+ /* Split the domain we just got for pattern matching */
+ init_domain_components(csp->http);
+#endif
+
+#ifdef FEATURE_TOGGLE
+ if ((csp->flags & CSP_FLAG_TOGGLED_ON) != 0)
+#endif
+ {
+ /* Determine the actions for this URL */
+ get_url_actions(csp, csp->http);
+ }
+
+ enlist(csp->https_headers, csp->http->cmd);
+
+ /* Append the previously read headers */
+ err = list_append_list_unique(csp->https_headers, headers);
+ destroy_list(headers);
+ if (JB_ERR_OK != err)
+ {
+ /* XXX: Send error message */
+ return err;
+ }
+
+ /* XXX: Work around crash */
+ csp->error_message = NULL;
+
+ /* XXX: Why do this here? */
+ csp->http->ssl = 1;
+
+ err = sed_https(csp);
+ if (JB_ERR_OK != err)
+ {
+ ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *)CHEADER, strlen(CHEADER));
+ log_error(LOG_LEVEL_ERROR, "Failed to parse client request from %s.",
+ csp->ip_addr_str);
+ log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
+ csp->ip_addr_str, csp->http->cmd);
+ return JB_ERR_PARSE;
+ }
+
+ log_error(LOG_LEVEL_HEADER, "Encrypted request processed");
+ log_applied_actions(csp->action);
+
+ return err;
+
+}
+#endif
+
+
+/*********************************************************************
+ *
+ * Function : handle_established_connection
+ *
+ * Description : Shuffle data between client and server once the
+ * connection has been established.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : Nothing.
+ *
+ *********************************************************************/
+static void handle_established_connection(struct client_state *csp)
+{
+ char *hdr;
+ char *p;
+ int n;
+#ifdef HAVE_POLL
+ struct pollfd poll_fds[2];
+#else
+ fd_set rfds;
+ jb_socket maxfd;
+ struct timeval timeout;
+#endif
+ int server_body;
+ int ms_iis5_hack = 0;
+ unsigned long long byte_count = 0;
+ struct http_request *http;
+ long len = 0; /* for buffer sizes (and negative error codes) */
+ int buffer_and_filter_content = 0;
+ unsigned int write_delay;
+#ifdef FEATURE_HTTPS_INSPECTION
+ int ret = 0;
+ int use_ssl_tunnel = 0;
+ csp->dont_verify_certificate = 0;
+
+ /*
+ * Preset flags informing if SSL connections with server or client
+ * are opened or closed
+ */
+ csp->ssl_with_server_is_opened = 0;
+ csp->ssl_with_client_is_opened = 0;
+
+ if (csp->http->ssl && !(csp->action->flags & ACTION_HTTPS_INSPECTION))
+ {
+ /* Pass encrypted content without filtering. */
+ use_ssl_tunnel = 1;
+ }
+#endif
+
+ /* Skeleton for HTTP response, if we should intercept the request */
+ struct http_response *rsp;
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ int watch_client_socket;
+#endif
+
+ csp->receive_buffer_size = csp->config->receive_buffer_size;
+ csp->receive_buffer = zalloc(csp->receive_buffer_size + 1);
+ if (csp->receive_buffer == NULL)
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Out of memory. Failed to allocate the receive buffer.");
+ rsp = cgi_error_memory();
+ send_crunch_response(csp, rsp);
+ return;
+ }
+
+ http = csp->http;
+
+#ifndef HAVE_POLL
+ maxfd = (csp->cfd > csp->server_connection.sfd) ?
+ csp->cfd : csp->server_connection.sfd;
+#endif
+
+ /* pass data between the client and server
+ * until one or the other shuts down the connection.
+ */
+
+ server_body = 0;
+
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ watch_client_socket = 0 == (csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING);
+#endif
+ write_delay = get_write_delay(csp);
+
+ for (;;)
+ {
+#ifndef HAVE_POLL
+#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
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ if (!watch_client_socket)
+ {
+ maxfd = csp->server_connection.sfd;
+ }
+ else
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
+ {
+ FD_SET(csp->cfd, &rfds);
+ }
+
+ FD_SET(csp->server_connection.sfd, &rfds);
+#endif /* ndef HAVE_POLL */
+
+#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))
+ {
+ /*
+ * XXX: This check should be obsolete now,
+ * but let's wait a while to be sure.
+ */
+ log_error(LOG_LEVEL_CONNECT,
+ "Looks like we got the last chunk together with "
+ "the server headers but didn't detect it earlier. "
+ "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))
+ {
+ if (csp->expected_content_length == byte_count)
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Done reading from server. Content length: %llu as expected. "
+ "Bytes most recently read: %d.",
+ byte_count, len);
+ }
+ else
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Done reading from server. Expected content length: %llu. "
+ "Actual content length: %llu. Bytes most recently read: %d.",
+ csp->expected_content_length, byte_count, len);
+ }
+ len = 0;
+ /*
+ * XXX: Should not jump around, handle_established_connection()
+ * is complicated enough already.
+ */
+ goto reading_done;
+ }
+#endif /* FEATURE_CONNECTION_KEEP_ALIVE */
+
+#ifdef FEATURE_HTTPS_INSPECTION
+ /*
+ * Test if some data from client or destination server are pending
+ * on TLS/SSL. We must work with them preferably. TLS/SSL data can
+ * be pending because of maximal fragment size.
+ */
+ int read_ssl_server = 0;
+ int read_ssl_client = 0;
+
+ if (client_use_ssl(csp))
+ {
+ read_ssl_client = is_ssl_pending(&(csp->mbedtls_client_attr.ssl)) != 0;
+ }
+
+ if (server_use_ssl(csp))
+ {
+ read_ssl_server = is_ssl_pending(&(csp->mbedtls_server_attr.ssl)) != 0;
+ }
+
+ if (!read_ssl_server && !read_ssl_client)
+#endif
+ {
+#ifdef HAVE_POLL
+ poll_fds[0].fd = csp->cfd;
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ if (!watch_client_socket)
+ {
+ /*
+ * Ignore incoming data, but still watch out
+ * for disconnects etc. These flags are always
+ * implied anyway but explicitly setting them
+ * doesn't hurt.
+ */
+ poll_fds[0].events = POLLERR|POLLHUP;
+ }
+ else
+#endif
+ {
+ poll_fds[0].events = POLLIN;
+ }
+ poll_fds[1].fd = csp->server_connection.sfd;
+ poll_fds[1].events = POLLIN;
+ n = poll(poll_fds, 2, csp->config->socket_timeout * 1000);
+#else
+ timeout.tv_sec = csp->config->socket_timeout;
+ timeout.tv_usec = 0;
+ n = select((int)maxfd + 1, &rfds, NULL, NULL, &timeout);
+#endif /* def HAVE_POLL */
+
+ /*server or client not responding in timeout */
+ if (n == 0)
+ {
+ log_error(LOG_LEVEL_CONNECT, "Socket timeout %d reached: %s",
+ csp->config->socket_timeout, http->url);
+ if ((byte_count == 0) && (http->ssl == 0))
+ {
+ send_crunch_response(csp, error_response(csp, "connection-timeout"));
+ }
+ mark_server_socket_tainted(csp);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return;
+ }
+ else if (n < 0)
+ {
+#ifdef HAVE_POLL
+ log_error(LOG_LEVEL_ERROR, "poll() failed!: %E");
+#else
+ log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
+#endif
+ mark_server_socket_tainted(csp);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return;
+ }
+ }
+#ifdef FEATURE_HTTPS_INSPECTION
+ else
+ {
+ /* set FD if some data are pending on TLS/SSL connections */
+#ifndef HAVE_POLL
+ FD_ZERO(&rfds);
+#endif
+ if (read_ssl_client)
+ {
+#ifdef HAVE_POLL
+ poll_fds[0].fd = csp->cfd;
+ poll_fds[0].events = POLLIN;
+#else
+ FD_SET(csp->cfd, &rfds);
+#endif
+ }
+
+ if (read_ssl_server)
+ {
+#ifdef HAVE_POLL
+ poll_fds[1].fd = csp->server_connection.sfd;
+ poll_fds[1].events = POLLIN;
+#else
+ FD_SET(csp->server_connection.sfd, &rfds);
+#endif
+ }
+ }
+#endif
+ /*
+ * This is the body of the browser's request,
+ * just read and write it.
+ *
+ * Receives data from browser and sends it to server
+ *
+ * XXX: Make sure the client doesn't use pipelining
+ * behind Privoxy's back.
+ */
+#ifdef HAVE_POLL
+ if ((poll_fds[0].revents & (POLLERR|POLLHUP|POLLNVAL)) != 0)
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "The client socket %d has become unusable while "
+ "the server socket %d is still open.",
+ csp->cfd, csp->server_connection.sfd);
+ mark_server_socket_tainted(csp);
+ break;
+ }
+
+ if (poll_fds[0].revents != 0)
+#else
+ if (FD_ISSET(csp->cfd, &rfds))
+#endif /* def HAVE_POLL*/
+ {
+ int max_bytes_to_read = (int)csp->receive_buffer_size;
+
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ if ((csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
+ {
+ if (data_is_available(csp->cfd, 0))
+ {
+ /*
+ * If the next request is already waiting, we have
+ * to stop select()ing the client socket. Otherwise
+ * we would always return right away and get nothing
+ * else done.
+ */
+ watch_client_socket = 0;
+ log_error(LOG_LEVEL_CONNECT,
+ "Stop watching client socket %d. "
+ "There's already another request waiting.",
+ csp->cfd);
+ continue;
+ }
+ /*
+ * If the client socket is set, but there's no data
+ * available on the socket, the client went fishing
+ * and continuing talking to the server makes no sense.
+ */
+ log_error(LOG_LEVEL_CONNECT,
+ "The client closed socket %d while "
+ "the server socket %d is still open.",
+ csp->cfd, csp->server_connection.sfd);
+ mark_server_socket_tainted(csp);
+ break;
+ }
+ if (csp->expected_client_content_length != 0)
+ {
+ if (csp->expected_client_content_length < csp->receive_buffer_size)
+ {
+ max_bytes_to_read = (int)csp->expected_client_content_length;
+ }
+ log_error(LOG_LEVEL_CONNECT,
+ "Waiting for up to %d bytes from the client.",
+ max_bytes_to_read);
+ }
+ assert(max_bytes_to_read <= csp->receive_buffer_size);
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
+
+#ifdef FEATURE_HTTPS_INSPECTION
+ /*
+ * Reading data from standard or secured connection (HTTP/HTTPS)
+ */
+ if (client_use_ssl(csp))
+ {
+ /*
+ * Receiving HTTP request from client over TLS/SSL and sending
+ * it to server over TLS/SSL.
+ */
+ len = ssl_recv_data(&(csp->mbedtls_client_attr.ssl),
+ (unsigned char *)csp->receive_buffer, (size_t)max_bytes_to_read);
+
+ if (len <= 0)
+ {
+ mark_server_socket_tainted(csp);
+ break;
+ }
+
+ ret = ssl_send_data(&(csp->mbedtls_server_attr.ssl),
+ (const unsigned char *)csp->receive_buffer, (size_t)len);
+
+ if (ret < 0)
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Send request over TLS/SSL to: %s failed", http->host);
+ mark_server_socket_tainted(csp);
+ close_client_and_server_ssl_connections(csp);
+ return;
+ }
+ }
+ else
+#endif /* def FEATURE_HTTPS_INSPECTION */
+ {
+ len = read_socket(csp->cfd, csp->receive_buffer, max_bytes_to_read);
+
+ if (len <= 0)
+ {
+ /* XXX: not sure if this is necessary. */
+ mark_server_socket_tainted(csp);
+ break; /* "game over, man" */
+ }
+
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ if (csp->expected_client_content_length != 0)
+ {
+ assert(len <= max_bytes_to_read);
+ csp->expected_client_content_length -= (unsigned)len;
+ log_error(LOG_LEVEL_CONNECT,
+ "Expected client content length set to %llu "
+ "after reading %d bytes.",
+ csp->expected_client_content_length, len);
+ if (csp->expected_client_content_length == 0)
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Done reading from the client.");
+ csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
+ }
+ }
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
+
+ if (write_socket(csp->server_connection.sfd, csp->receive_buffer, (size_t)len))
+ {
+ log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
+ mark_server_socket_tainted(csp);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return;
+ }
+ }
+ continue;
+ }
+
+ /*
+ * 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.
+ */
+#ifdef HAVE_POLL
+ if (poll_fds[1].revents != 0)
+#else
+ if (FD_ISSET(csp->server_connection.sfd, &rfds))
+#endif /* HAVE_POLL */
+ {
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ /*
+ * If we are buffering content, we don't want to eat up to
+ * buffer-limit bytes if the client no longer cares about them.
+ * If we aren't buffering, however, a dead client socket will be
+ * noticed pretty much right away anyway, so we can reduce the
+ * overhead by skipping the check.
+ */
+ if (buffer_and_filter_content && !socket_is_still_alive(csp->cfd))
+ {
+#ifdef _WIN32
+ log_error(LOG_LEVEL_CONNECT,
+ "The server still wants to talk, but the client may already have hung up on us.");
+#else
+ log_error(LOG_LEVEL_CONNECT,
+ "The server still wants to talk, but the client hung up on us.");
+ mark_server_socket_tainted(csp);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return;
+#endif /* def _WIN32 */
+ }
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
+
+#ifdef FEATURE_HTTPS_INSPECTION
+ /*
+ * Reading data from standard or secured connection (HTTP/HTTPS)
+ */
+ if (server_use_ssl(csp))
+ {
+ len = ssl_recv_data(&(csp->mbedtls_server_attr.ssl),
+ (unsigned char *)csp->receive_buffer, csp->receive_buffer_size);
+ }
+ else
+#endif
+ {
+ len = read_socket(csp->server_connection.sfd, csp->receive_buffer,
+ (int)csp->receive_buffer_size);
+ }
+
+ if (len < 0)
+ {
+ log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
+
+ if ((http->ssl && (csp->fwd == NULL))
+#ifdef FEATURE_HTTPS_INSPECTION
+ && use_ssl_tunnel
+#endif
+ )
+ {
+ /*
+ * 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);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return;
+ }
+ /*
+ * XXX: Consider handling the cases above the same.
+ */
+ mark_server_socket_tainted(csp);
+ len = 0;
+ }
+
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ if (csp->flags & CSP_FLAG_CHUNKED)
+ {
+ if ((len >= 5) && !memcmp(csp->receive_buffer+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;
+ }
+ }
+ reading_done:
+#endif /* FEATURE_CONNECTION_KEEP_ALIVE */
+
+ /*
+ * This is guaranteed by allocating with zalloc_or_die()
+ * and never (intentionally) writing to the last byte.
+ *
+ * csp->receive_buffer_size is the size of the part of the
+ * buffer we intentionally write to, but we actually
+ * allocated csp->receive_buffer_size+1 bytes so the assertion
+ * stays within the allocated range.
+ */
+ assert(csp->receive_buffer[csp->receive_buffer_size] == '\0');
+
+ /*
+ * Add a trailing zero to let be able to use string operations.
+ * XXX: do we still need this with filter_popups gone?
+ */
+ assert(len <= csp->receive_buffer_size);
+ csp->receive_buffer[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
+ * prevents it from sending the trailing \r\n in
+ * a 302 redirect header (and possibly other headers).
+ * To work around this if we've haven't parsed
+ * a full header we'll append a trailing \r\n
+ * and see if this now generates a valid one.
+ *
+ * This hack shouldn't have any impacts. If we've
+ * already transmitted the header or if this is a
+ * SSL connection, then we won't bother with this
+ * hack. So we only work on partially received
+ * headers. If we append a \r\n and this still
+ * doesn't generate a valid header, then we won't
+ * transmit anything to the client.
+ */
+ if (len == 0)
+ {
+
+ if (server_body || (http->ssl
+#ifdef FEATURE_HTTPS_INSPECTION
+ && use_ssl_tunnel
+#endif
+ ))
+ {
+ /*
+ * If we have been buffering up the document,
+ * now is the time to apply content modification
+ * and send the result to the client.
+ */
+ if (buffer_and_filter_content)
+ {
+ p = execute_content_filters(csp);
+ /*
+ * If content filtering fails, use the original
+ * buffer and length.
+ * (see p != NULL ? p : csp->iob->cur below)
+ */
+ if (NULL == p)
+ {
+ csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
+ }
+#ifdef FEATURE_COMPRESSION
+ else if ((csp->flags & CSP_FLAG_CLIENT_SUPPORTS_DEFLATE)
+ && (csp->content_length > LOWER_LENGTH_LIMIT_FOR_COMPRESSION))
+ {
+ char *compressed_content = compress_buffer(p,
+ (size_t *)&csp->content_length, csp->config->compression_level);
+ if (compressed_content != NULL)
+ {
+ freez(p);
+ p = compressed_content;
+ csp->flags |= CSP_FLAG_BUFFERED_CONTENT_DEFLATED;
+ }
+ }
+#endif
+
+ 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");
+ }
+
+#ifdef FEATURE_HTTPS_INSPECTION
+ /*
+ * Sending data with standard or secured connection (HTTP/HTTPS)
+ */
+ if (client_use_ssl(csp))
+ {
+ if ((ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *)hdr, strlen(hdr)) < 0)
+ || (ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *) ((p != NULL) ? p : csp->iob->cur),
+ csp->content_length) < 0))
+ {
+ log_error(LOG_LEVEL_ERROR, "write modified content to "
+ "client over TLS/SSL failed");
+ freez(hdr);
+ freez(p);
+ mark_server_socket_tainted(csp);
+ close_client_and_server_ssl_connections(csp);
+ return;
+ }
+ }
+ else
+#endif /* def FEATURE_HTTPS_INSPECTION */
+ {
+ if (write_socket_delayed(csp->cfd, hdr, strlen(hdr), write_delay)
+ || write_socket_delayed(csp->cfd, ((p != NULL) ? p : csp->iob->cur),
+ (size_t)csp->content_length, write_delay))
+ {
+ log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
+ freez(hdr);
+ freez(p);
+ mark_server_socket_tainted(csp);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return;
+ }
+ }
+
+ freez(hdr);
+ freez(p);
+ }
+
+ break; /* "game over, man" */
+ }
+
+ /*
+ * This is NOT the body, so
+ * Let's pretend the server just sent us a blank line.
+ */
+ snprintf(csp->receive_buffer, csp->receive_buffer_size, "\r\n");
+ len = (int)strlen(csp->receive_buffer);
+
+ /*
+ * Now, let the normal header parsing algorithm below do its
+ * job. If it fails, we'll exit instead of continuing.
+ */
+
+ ms_iis5_hack = 1;
+ }
+
+ /*
+ * If we're in the body of the server document, just write it to
+ * the client, unless we need to buffer the body for later
+ * content-filtering.
+ */
+ if (server_body || (http->ssl
+#ifdef FEATURE_HTTPS_INSPECTION
+ && use_ssl_tunnel
+#endif
+ ))
+ {
+ if (buffer_and_filter_content)
+ {
+ /*
+ * 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 (add_to_iob(csp->iob, csp->config->buffer_limit, csp->receive_buffer, len))
+ {
+ size_t hdrlen;
+ long flushed;
+
+ log_error(LOG_LEVEL_INFO,
+ "Flushing header and buffers. Stepping back from filtering.");
+
+ hdr = list_to_text(csp->headers);
+ if (hdr == NULL)
+ {
+ /*
+ * 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);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return;
+ }
+ hdrlen = strlen(hdr);
+
+#ifdef FEATURE_HTTPS_INSPECTION
+ /*
+ * Sending data with standard or secured connection (HTTP/HTTPS)
+ */
+ if (client_use_ssl(csp))
+ {
+ if ((ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *)hdr, hdrlen) < 0)
+ || ((flushed = ssl_flush_socket(&(csp->mbedtls_client_attr.ssl),
+ csp->iob)) < 0)
+ || (ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *)csp->receive_buffer, (size_t)len) < 0))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Flush header and buffers to client failed");
+ freez(hdr);
+ mark_server_socket_tainted(csp);
+ close_client_and_server_ssl_connections(csp);
+ return;
+ }
+ }
+ else
+#endif /* def FEATURE_HTTPS_INSPECTION */
+ {
+ if (write_socket_delayed(csp->cfd, hdr, hdrlen, write_delay)
+ || ((flushed = flush_iob(csp->cfd, csp->iob, write_delay)) < 0)
+ || write_socket_delayed(csp->cfd, csp->receive_buffer, (size_t)len,
+ write_delay))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Flush header and buffers to client failed: %E");
+ freez(hdr);
+ mark_server_socket_tainted(csp);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ 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);
+ buffer_and_filter_content = 0;
+ server_body = 1;
+ }
+ }
+ else
+ {
+#ifdef FEATURE_HTTPS_INSPECTION
+ /*
+ * Sending data with standard or secured connection (HTTP/HTTPS)
+ */
+ if (client_use_ssl(csp))
+ {
+ ret = ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *)csp->receive_buffer, (size_t)len);
+ if (ret < 0)
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Sending data to client failed");
+ mark_server_socket_tainted(csp);
+ close_client_and_server_ssl_connections(csp);
+ return;
+ }
+ }
+ else
+#endif /* def FEATURE_HTTPS_INSPECTION */
+ {
+ if (write_socket_delayed(csp->cfd, csp->receive_buffer,
+ (size_t)len, write_delay))
+ {
+ log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
+ mark_server_socket_tainted(csp);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return;
+ }
+ }
+ }
+ byte_count += (unsigned long long)len;
+ continue;
+ }
+ else
+ {
+ /*
+ * 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.
+ */
+ if (add_to_iob(csp->iob, csp->config->buffer_limit, csp->receive_buffer, len))
+ {
+ 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);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return;
+ }
+
+ /* 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
+ * we can do about it.
+ */
+ log_error(LOG_LEVEL_ERROR, "Invalid server headers. "
+ "Applying the MS IIS5 hack didn't help.");
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
+#ifdef FEATURE_HTTPS_INSPECTION
+ /*
+ * Sending data with standard or secured connection (HTTP/HTTPS)
+ */
+ if (client_use_ssl(csp))
+ {
+ ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
+ strlen(INVALID_SERVER_HEADERS_RESPONSE));
+ }
+ else
+#endif /* def FEATURE_HTTPS_INSPECTION */
+ {
+ write_socket_delayed(csp->cfd,
+ INVALID_SERVER_HEADERS_RESPONSE,
+ strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
+ }
+ mark_server_socket_tainted(csp);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return;
+ }
+ else
+ {
+ /*
+ * Since we have to wait for more from the server before
+ * we can parse the headers we just continue here.
+ */
+ log_error(LOG_LEVEL_CONNECT,
+ "Continuing buffering server headers from socket %d. "
+ "Bytes most recently read: %d.", csp->cfd, len);
+ continue;
+ }
+ }
+ else
+ {
+ /*
+ * Account for the content bytes we
+ * might have gotten with the headers.
+ */
+ assert(csp->iob->eod >= csp->iob->cur);
+ byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
+ }
+
+ /* Did we actually get anything? */
+ if (NULL == csp->headers->first)
+ {
+ if ((csp->flags & CSP_FLAG_REUSED_CLIENT_CONNECTION))
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "No server or forwarder response received on socket %d. "
+ "Closing client socket %d without sending data.",
+ csp->server_connection.sfd, csp->cfd);
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
+ }
+ else
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "No server or forwarder response received on socket %d.",
+ csp->server_connection.sfd);
+ send_crunch_response(csp, error_response(csp, "no-server-data"));
+ }
+ free_http_request(http);
+ mark_server_socket_tainted(csp);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return;
+ }
+
+ if (!csp->headers->first->str)
+ {
+ log_error(LOG_LEVEL_ERROR, "header search: csp->headers->first->str == NULL, assert will be called");
+ }
+ assert(csp->headers->first->str);
+
+ if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
+ strncmpic(csp->headers->first->str, "ICY", 3))
+ {
+ /*
+ * It doesn't look like a HTTP (or Shoutcast) response:
+ * tell the client and log the problem.
+ */
+ if (strlen(csp->headers->first->str) > 30)
+ {
+ csp->headers->first->str[30] = '\0';
+ }
+ log_error(LOG_LEVEL_ERROR,
+ "Invalid server or forwarder response. Starts with: %s",
+ csp->headers->first->str);
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
+#ifdef FEATURE_HTTPS_INSPECTION
+ /*
+ * Sending data with standard or secured connection (HTTP/HTTPS)
+ */
+ if (client_use_ssl(csp))
+ {
+ ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
+ strlen(INVALID_SERVER_HEADERS_RESPONSE));
+ }
+ else
+#endif /* def FEATURE_HTTPS_INSPECTION */
+ {
+ write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
+ strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
+ }
+ free_http_request(http);
+ mark_server_socket_tainted(csp);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return;
+ }
+
+ /*
+ * 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))
+ {
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
+#ifdef FEATURE_HTTPS_INSPECTION
+ /*
+ * Sending data with standard or secured connection (HTTP/HTTPS)
+ */
+ if (client_use_ssl(csp))
+ {
+ ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
+ strlen(INVALID_SERVER_HEADERS_RESPONSE));
+ }
+ else
+#endif
+ {
+ write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
+ strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
+ }
+ free_http_request(http);
+ mark_server_socket_tainted(csp);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return;
+ }
+ 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 ((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 got 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;
+ }
+
+ csp->server_connection.response_received = time(NULL);
+
+ 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);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return;
+ }
+
+ /* Buffer and pcrs filter this if appropriate. */
+ buffer_and_filter_content = content_requires_filtering(csp);
+
+ if (!buffer_and_filter_content)
+ {
+ /*
+ * Write the server's (modified) header to
+ * the client (along with anything else that
+ * may be in the buffer). Use standard or secured
+ * connection.
+ */
+#ifdef FEATURE_HTTPS_INSPECTION
+ if (client_use_ssl(csp))
+ {
+ if ((ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *)hdr, strlen(hdr)) < 0)
+ || (len = ssl_flush_socket(&(csp->mbedtls_client_attr.ssl),
+ csp->iob) < 0))
+ {
+ log_error(LOG_LEVEL_CONNECT, "Write header to client failed");
+
+ /*
+ * 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);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return;
+ }
+ }
+ else
+#endif /* def FEATURE_HTTPS_INSPECTION */
+ {
+ if (write_socket_delayed(csp->cfd, hdr, strlen(hdr), write_delay)
+ || ((len = flush_iob(csp->cfd, csp->iob, write_delay)) < 0))
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "write header to client failed");
+ /*
+ * 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);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return;
+ }
+ }
+ }
+
+ /* 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 (ms_iis5_hack)
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Closed server connection detected. "
+ "Applying the MS IIS5 hack didn't help.");
+ log_error(LOG_LEVEL_CLF,
+ "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
+#ifdef FEATURE_HTTPS_INSPECTION
+ /*
+ * Sending data with standard or secured connection (HTTP/HTTPS)
+ */
+ if (client_use_ssl(csp))
+ {
+ ssl_send_data(&(csp->mbedtls_client_attr.ssl),
+ (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
+ strlen(INVALID_SERVER_HEADERS_RESPONSE));
+ }
+ else
+#endif /* def FEATURE_HTTPS_INSPECTION */
+ {
+ write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
+ strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
+ }
+ mark_server_socket_tainted(csp);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return;
+ }
+ }
+ continue;
+ }
+ mark_server_socket_tainted(csp);
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ return; /* huh? we should never get here */
+ }
+#ifdef FEATURE_HTTPS_INSPECTION
+ close_client_and_server_ssl_connections(csp);
+#endif
+ if (csp->content_length == 0)
+ {
+ /*
+ * If Privoxy didn't recalculate the Content-Length,
+ * 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);
+
+ csp->server_connection.timestamp = time(NULL);
+}
+
+
+/*********************************************************************
+ *
+ * Function : chat
+ *
+ * Description : Once a connection from the client has been accepted,
+ * this function is called (via serve()) to handle the
+ * main business of the communication. This function
+ * returns after dealing with a single request. It can
+ * be called multiple times with the same client socket
+ * if the client is keeping the connection alive.
+ *
+ * The decision whether or not a client connection will
+ * be kept alive is up to the caller which also must
+ * close the client socket when done.
+ *
+ * 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)
+{
+ const struct forward_spec *fwd;
+ struct http_request *http;
+ /* Skeleton for HTTP response, if we should intercept the request */
+ struct http_response *rsp;
+#ifdef FEATURE_HTTPS_INSPECTION
+ int use_ssl_tunnel = 0;
+#endif
+
+ 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 */
+ 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;
+ }
+
+#ifdef FEATURE_HTTPS_INSPECTION
+ /*
+ * Setting flags to use old solution with SSL tunnel and to disable
+ * certificates verification.
+ */
+ if (csp->http->ssl && !(csp->action->flags & ACTION_HTTPS_INSPECTION))
+ {
+ use_ssl_tunnel = 1;
+ }
+
+ if (http->ssl && csp->action->flags & ACTION_IGNORE_CERTIFICATE_ERRORS)
+ {
+ csp->dont_verify_certificate = 1;
+ }
+#endif
+
+ /*
+ * 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
+ * HTTP request that has either the path component
+ * without the http://domainspec (w/path) or the
+ * full orininal URL (w/url)
+ * Note that the path and/or the HTTP version may
+ * have been altered by now.
+ *
+ * SSL proxy = Open a socket to the host:port of the server
+ * and create TLS/SSL connection with server and
+ * with client. Then behave like mediator between
+ * client and server over TLS/SSL.
+ *
+ * SSL proxy = Pass the request unchanged if forwarding a CONNECT
+ * with request to a parent proxy. Note that we'll be sending
+ * forwarding the CFAIL message ourselves if connecting to the parent
+ * fails, but we won't send a CSUCCEED message if it works,
+ * since that would result in a double message (ours and the
+ * parent's). After sending the request to the parent, we
+ * must parse answer and send it to client. If connection
+ * with server is established, we do TLS/SSL proxy. Otherwise
+ * we send parent response to client and close connections.
+ *
+ * here's the matrix:
+ * SSL
+ * 0 1
+ * +--------+--------+
+ * | | |
+ * 0 | create | SSL |
+ * | w/path | proxy |
+ * Forwarding +--------+--------+
+ * | | SSL |
+ * 1 | create | proxy |
+ * | w/url |+forward|
+ * +--------+--------+
+ *
+ */
+
+#ifdef FEATURE_HTTPS_INSPECTION
+ /*
+ * Presetting SSL client and server flags
+ */
+ if (http->ssl && !use_ssl_tunnel)
+ {
+ http->client_ssl = 1;
+ http->server_ssl = 1;
+ }
+ else
+ {
+ http->client_ssl = 0;
+ http->server_ssl = 0;
+ }
+#endif
+
+ if (http->ssl && connect_port_is_forbidden(csp))
+ {
+ 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 %s",
+ csp->ip_addr_str, acceptable_connect_ports, csp->http->hostport);
+ csp->action->flags |= ACTION_BLOCK;
+ http->ssl = 0;
+#ifdef FEATURE_HTTPS_INSPECTION
+ http->client_ssl = 0;
+ http->server_ssl = 0;
+#endif
+ }
+
+
+ freez(csp->headers->first->str);
+ build_request_line(csp, fwd, &csp->headers->first->str);
+
+ /*
+ * We have a request. Check if one of the crunchers wants it
+ * unless the client wants to use TLS/SSL in which case we
+ * haven't setup the TLS context yet and will send the crunch
+ * response later.
+ */
+ if (
+#ifdef FEATURE_HTTPS_INSPECTION
+ !client_use_ssl(csp) &&
+#endif
+ crunch_response_triggered(csp, crunchers_all))
+ {
+ /*
+ * Yes. The client got the crunch response and we're done here.
+ */
+ return;
+ }
+
+ log_applied_actions(csp->action);
+ log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
+
+ if (fwd->forward_host)
+ {
+ log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
+ fwd->forward_host, fwd->forward_port, http->hostport);
+ }
+ else
+ {
+ log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
+ }
+
+ /* here we connect to the server, gateway, or the forwarder */
+
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ if ((csp->server_connection.sfd != JB_INVALID_SOCKET)
+ && socket_is_still_alive(csp->server_connection.sfd)
+ && connection_destination_matches(&csp->server_connection, http, fwd))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Reusing server socket %d connected to %s. Total requests: %u.",
+ csp->server_connection.sfd, csp->server_connection.host,
+ csp->server_connection.requests_sent_total);
+ }
+ else
+ {
+ if (csp->server_connection.sfd != JB_INVALID_SOCKET)
+ {
+#ifdef FEATURE_CONNECTION_SHARING
+ if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
+ {
+ remember_connection(&csp->server_connection);
+ }
+ else
+#endif /* def FEATURE_CONNECTION_SHARING */
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Closing server socket %d connected to %s. Total requests: %u.",
+ csp->server_connection.sfd, csp->server_connection.host,
+ csp->server_connection.requests_sent_total);
+ close_socket(csp->server_connection.sfd);
+ }
+ mark_connection_closed(&csp->server_connection);
+ }
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
+#ifdef FEATURE_HTTPS_INSPECTION
+ if (http->ssl && !use_ssl_tunnel)
+ {
+ int ret;
+ /*
+ * Creating an SSL proxy. If forwarding is disabled, we must send
+ * CSUCCEED mesage to client. Then TLS/SSL connection with client
+ * is created.
+ */
+
+ if (fwd->forward_host == NULL)
+ {
+ /*
+ * We're lying to the client as the connection hasn't actually
+ * been established yet. We don't establish the connection until
+ * we have seen and parsed the encrypted client headers.
+ */
+ if (write_socket_delayed(csp->cfd, CSUCCEED,
+ strlen(CSUCCEED), get_write_delay(csp)) != 0)
+ {
+ log_error(LOG_LEVEL_ERROR, "Sending SUCCEED to client failed");
+ return;
+ }
+ }
+
+ ret = create_client_ssl_connection(csp);
+ if (ret != 0)
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Can't open secure connection with client");
+ close_client_ssl_connection(csp); /* XXX: Is this needed? */
+ return;
+ }
+ if (JB_ERR_OK != process_encrypted_request(csp))
+ {
+ log_error(LOG_LEVEL_ERROR, "Failed to parse encrypted request.");
+ close_client_ssl_connection(csp);
+ return;
+ }
+ /*
+ * We have an encrypted request. Check if one of the crunchers now
+ * wants it (for example because the previously invisible path was
+ * required to match).
+ */
+ if (crunch_response_triggered(csp, crunchers_all))
+ {
+ /*
+ * Yes. The client got the crunch response and we're done here.
+ */
+ close_client_ssl_connection(csp);
+ return;
+ }
+ }
+#endif
+ /*
+ * Connecting to destination server
+ */
+ csp->server_connection.sfd = forwarded_connect(fwd, http, csp);
+
+ if (csp->server_connection.sfd == JB_INVALID_SOCKET)
+ {
+ if (fwd->type != SOCKS_NONE)
+ {
+ /* Socks error. */
+ rsp = error_response(csp, "forwarding-failed");
+ }
+ else if (errno == EINVAL)
+ {
+ rsp = error_response(csp, "no-such-domain");
}
else
{
- const char *header_start;
+ rsp = error_response(csp, "connect-failed");
+ }
+
+ /* Write the answer to the client */
+ if (rsp != NULL)
+ {
+ send_crunch_response(csp, rsp);
+ }
+
+ /*
+ * Temporary workaround to prevent already-read client
+ * bodies from being parsed as new requests. For now we
+ * err on the safe side and throw all the following
+ * requests under the bus, even if no client body has been
+ * buffered. A compliant client will repeat the dropped
+ * requests on an untainted connection.
+ *
+ * The proper fix is to discard the no longer needed
+ * client body in the buffer (if there is one) and to
+ * continue parsing the bytes that follow.
+ */
+ drain_and_close_socket(csp->cfd);
+ csp->cfd = JB_INVALID_SOCKET;
+
+ return;
+ }
+
+#ifdef FEATURE_HTTPS_INSPECTION
+ /*
+ * Creating TLS/SSL connections with destination server or parent
+ * proxy. If forwarding is enabled, we must send client request to
+ * parent proxy and receive, parse and resend parent proxy answer.
+ */
+ if (http->ssl && !use_ssl_tunnel)
+ {
+ if (fwd->forward_host != NULL)
+ {
+ char server_response[BUFFER_SIZE];
+ int ret = 0;
+ int len = 0;
+ char *hdr = list_to_text(csp->headers);
+ memset(server_response, 0, sizeof(server_response));
+
+ if (hdr == NULL)
+ {
+ log_error(LOG_LEVEL_FATAL,
+ "Out of memory parsing client header");
+ }
+ list_remove_all(csp->headers);
+
/*
- * 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.
+ * Sending client's CONNECT request to the parent proxy
*/
- if (add_to_iob(csp, buf, len))
+ ret = write_socket(csp->server_connection.sfd, hdr, strlen(hdr));
+
+ freez(hdr);
+
+ if (ret != 0)
{
- log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
- rsp = cgi_error_memory();
- send_crunch_response(csp, rsp);
+ log_error(LOG_LEVEL_CONNECT,
+ "Sending request headers to: %s failed", http->hostport);
mark_server_socket_tainted(csp);
+ close_client_ssl_connection(csp);
return;
}
- header_start = csp->iob->cur;
+ /* Waiting for parent proxy server response */
+ len = read_socket(csp->server_connection.sfd, server_response,
+ sizeof(server_response)-1);
- /* Convert iob into something sed() can digest */
- if (JB_ERR_PARSE == get_server_headers(csp))
+ if (len <= 0)
{
- 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
- * we can do about it.
- */
- log_error(LOG_LEVEL_INFO,
- "MS IIS5 hack didn't produce valid headers.");
- break;
- }
- else
+ log_error(LOG_LEVEL_ERROR, "No response from parent proxy "
+ "server on socket %d.", csp->server_connection.sfd);
+
+ rsp = error_response(csp, "no-server-data");
+ if (rsp)
{
- /*
- * 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;
+ send_crunch_response(csp, rsp);
}
- }
-
- /* 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);
+ close_client_ssl_connection(csp);
return;
}
- assert(csp->headers->first->str);
- assert(!http->ssl);
- if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
- strncmpic(csp->headers->first->str, "ICY", 3))
+ /*
+ * Test if connection with destination server was established
+ * successfully by parent proxy. Then we can send response to
+ * the client and continue or stop.
+ */
+ if (!tunnel_established_successfully(server_response, (unsigned int)len))
{
- /*
- * It doesn't look like a HTTP (or Shoutcast) response:
- * tell the client and log the problem.
- */
- if (strlen(csp->headers->first->str) > 30)
- {
- csp->headers->first->str[30] = '\0';
- }
- log_error(LOG_LEVEL_ERROR,
- "Invalid server or forwarder response. Starts with: %s",
- csp->headers->first->str);
- log_error(LOG_LEVEL_CLF,
- "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
- write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
- strlen(INVALID_SERVER_HEADERS_RESPONSE));
- free_http_request(http);
+ log_error(LOG_LEVEL_ERROR, "Forwarder hasn't established "
+ "connection with destination server.");
+
+ write_socket(csp->cfd, server_response, (size_t)len);
mark_server_socket_tainted(csp);
+ close_client_ssl_connection(csp);
return;
}
/*
- * We have now received the entire server header,
- * filter it and send the result to the client
+ * Parent proxy has established connection with destination server.
+ * Now we must create TLS/SSL connection with parent proxy.
*/
- if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
- {
- log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
- }
- 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");
- }
+ ret = create_server_ssl_connection(csp);
- if (crunch_response_triggered(csp, crunchers_light))
+ /*
+ * If TLS/SSL connection wasn't created and invalid certificate
+ * wasn't detected, we can interrupt this function. Otherwise, we
+ * must inform the client about invalid server certificate.
+ */
+ if (ret != 0
+ && (csp->server_cert_verification_result == SSL_CERT_NOT_VERIFIED
+ || csp->server_cert_verification_result == SSL_CERT_VALID))
{
- /*
- * 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;
+ rsp = error_response(csp, "connect-failed");
+ if (rsp)
+ {
+ send_crunch_response(csp, rsp);
+ }
+ return;
}
- /* Buffer and pcrs filter this if appropriate. */
- if (!http->ssl) /* We talk plaintext */
+ /*
+ * TLS/SSL connection with parent proxy is established, we can
+ * inform client about success.
+ */
+ ret = write_socket(csp->cfd, server_response, (size_t)len);
+ if (ret != 0)
{
- content_filter = get_filter_function(csp);
+ log_error(LOG_LEVEL_ERROR,
+ "Sending parent proxy response to client failed");
+ mark_server_socket_tainted(csp);
+ close_client_ssl_connection(csp);
+ return;
}
+ }/* -END- if (fwd->forward_host != NULL) */
+ else
+ {
/*
- * Only write if we're not buffering for content modification
+ * Parent proxy is not used, we can just create TLS/SSL connection
+ * with destination server
*/
- if (!content_filter)
+ int ret = create_server_ssl_connection(csp);
+ if (ret != 0)
{
- /*
- * 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))
+ if (csp->server_cert_verification_result != SSL_CERT_VALID &&
+ csp->server_cert_verification_result != SSL_CERT_NOT_VERIFIED)
{
- 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.
+ * If the server certificate is invalid, we must inform
+ * the client and then close connection to the client.
*/
- freez(hdr);
- mark_server_socket_tainted(csp);
+ ssl_send_certificate_error(csp);
+ close_client_and_server_ssl_connections(csp);
+ return;
+ }
+ if (csp->server_cert_verification_result == SSL_CERT_NOT_VERIFIED
+ || csp->server_cert_verification_result == SSL_CERT_VALID)
+ {
+ /*
+ * The TLS/SSL connection wasn't created but an invalid
+ * certificate wasn't detected. Report it as connection
+ * failure.
+ */
+ rsp = error_response(csp, "connect-failed");
+ if (rsp)
+ {
+ send_crunch_response(csp, rsp);
+ }
return;
}
-
- byte_count += (unsigned long long)len;
- }
- else
- {
- /*
- * XXX: the header lenght should probably
- * be calculated by get_server_headers().
- */
- long header_length = csp->iob->cur - header_start;
- assert(csp->iob->cur > header_start);
- byte_count += (unsigned long long)(len - header_length);
}
+ }
+ }/* -END- if (http->ssl) */
+#endif /* def FEATURE_HTTPS_INSPECTION */
- /* we're finished with the server's header */
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ save_connection_destination(csp->server_connection.sfd,
+ http, fwd, &csp->server_connection);
+ csp->server_connection.keep_alive_timeout =
+ (unsigned)csp->config->keep_alive_timeout;
+ }
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
- freez(hdr);
- server_body = 1;
+ csp->server_connection.requests_sent_total++;
- /*
- * 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;
- }
+ if ((fwd->type == SOCKS_5T) && (NULL == csp->headers->first))
+ {
+ /* Client headers have been sent optimistically */
+ assert(csp->headers->last == NULL);
+ }
+ else if (http->ssl == 0 || (fwd->forward_host
+#ifdef FEATURE_HTTPS_INSPECTION
+ && use_ssl_tunnel
+#endif
+ ))
+ {
+ if (send_http_request(csp))
+ {
+ rsp = error_response(csp, "connect-failed");
+ if (rsp)
+ {
+ send_crunch_response(csp, rsp);
}
- continue;
+ return;
}
- mark_server_socket_tainted(csp);
- return; /* huh? we should never get here */
}
-
- if (csp->content_length == 0)
+ else
{
/*
- * If Privoxy didn't recalculate the Content-Lenght,
- * byte_count is still correct.
+ * Using old solution with SSL tunnel or new solution with SSL proxy
*/
- csp->content_length = byte_count;
+ list_remove_all(csp->headers);
+#ifdef FEATURE_HTTPS_INSPECTION
+ if (use_ssl_tunnel)
+#endif
+ {
+ /*
+ * We're running an SSL tunnel and we're not forwarding,
+ * so just ditch the client headers, send the "connect succeeded"
+ * message to the client, flush the rest, and get out of the way.
+ */
+ if (write_socket_delayed(csp->cfd, CSUCCEED,
+ strlen(CSUCCEED), get_write_delay(csp)))
+ {
+ return;
+ }
+ }
+#ifdef FEATURE_HTTPS_INSPECTION
+ else
+ {
+ /*
+ * If server certificate is invalid, we must inform client and then
+ * close connection with client.
+ */
+ if (csp->server_cert_verification_result != SSL_CERT_VALID)
+ {
+ ssl_send_certificate_error(csp);
+ close_client_and_server_ssl_connections(csp);
+ return;
+ }
+ if (send_https_request(csp))
+ {
+ rsp = error_response(csp, "connect-failed");
+ if (rsp)
+ {
+ send_crunch_response(csp, rsp);
+ }
+ close_client_and_server_ssl_connections(csp);
+ return;
+ }
+ }
+#endif /* def FEATURE_HTTPS_INSPECTION */
+ clear_iob(csp->client_iob);
+ }/* -END- else ... if (http->ssl == 1) */
+
+ log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
+
+ /* XXX: should the time start earlier for optimistically sent data? */
+ csp->server_connection.request_sent = time(NULL);
+
+ handle_established_connection(csp);
+ freez(csp->receive_buffer);
+}
+
+
+#ifdef FUZZ
+/*********************************************************************
+ *
+ * Function : fuzz_server_response
+ *
+ * Description : Treat the input as a whole server response.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ * 2 : fuzz_input_file = File to read the input from.
+ *
+ * Returns : 0
+ *
+ *********************************************************************/
+extern int fuzz_server_response(struct client_state *csp, char *fuzz_input_file)
+{
+ static struct forward_spec fwd; /* Zero'd due to being static */
+ csp->cfd = 0;
+
+ if (strcmp(fuzz_input_file, "-") == 0)
+ {
+ /* XXX: Doesn'T work yet. */
+ csp->server_connection.sfd = 0;
+ }
+ else
+ {
+ csp->server_connection.sfd = open(fuzz_input_file, O_RDONLY);
+ if (csp->server_connection.sfd == -1)
+ {
+ log_error(LOG_LEVEL_FATAL, "Failed to open %s: %E",
+ fuzz_input_file);
+ }
}
+ csp->fwd = &fwd;
+ csp->content_type |= CT_GIF;
+ csp->action->flags |= ACTION_DEANIMATE;
+ csp->action->string[ACTION_STRING_DEANIMATE] = "last";
+
+ csp->http->path = strdup_or_die("/");
+ csp->http->host = strdup_or_die("fuzz.example.org");
+ csp->http->hostport = strdup_or_die("fuzz.example.org:80");
+ /* Prevent client socket monitoring */
+ csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
+ csp->flags |= CSP_FLAG_CHUNKED;
+
+ csp->config->feature_flags |= RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE;
+ csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
+
+ csp->content_type |= CT_DECLARED|CT_GIF;
+
+ csp->config->socket_timeout = 0;
+
+ cgi_init_error_messages();
+
+ handle_established_connection(csp);
+ freez(csp->receive_buffer);
+
+ return 0;
+}
+#endif
+
#ifdef FEATURE_CONNECTION_KEEP_ALIVE
- if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
- && (csp->expected_content_length != byte_count))
+/*********************************************************************
+ *
+ * Function : prepare_csp_for_next_request
+ *
+ * Description : Put the csp in a mostly vergin state.
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : N/A
+ *
+ *********************************************************************/
+static void prepare_csp_for_next_request(struct client_state *csp)
+{
+ csp->content_type = 0;
+ csp->content_length = 0;
+ csp->expected_content_length = 0;
+ csp->expected_client_content_length = 0;
+ list_remove_all(csp->headers);
+ clear_iob(csp->iob);
+ freez(csp->error_message);
+ free_http_request(csp->http);
+ destroy_list(csp->headers);
+ destroy_list(csp->tags);
+#ifdef FEATURE_CLIENT_TAGS
+ destroy_list(csp->client_tags);
+ freez(csp->client_address);
+#endif
+ free_current_action(csp->action);
+ if (NULL != csp->fwd)
{
- log_error(LOG_LEVEL_CONNECT,
- "Received %llu bytes while expecting %llu.",
- byte_count, csp->expected_content_length);
- mark_server_socket_tainted(csp);
+ unload_forward_spec(csp->fwd);
+ csp->fwd = NULL;
+ }
+ /* XXX: Store per-connection flags someplace else. */
+ csp->flags = (CSP_FLAG_ACTIVE | CSP_FLAG_REUSED_CLIENT_CONNECTION);
+#ifdef FEATURE_TOGGLE
+ if (global_toggle_state)
+#endif /* def FEATURE_TOGGLE */
+ {
+ csp->flags |= CSP_FLAG_TOGGLED_ON;
+ }
+
+ if (csp->client_iob->eod > csp->client_iob->cur)
+ {
+ long bytes_to_shift = csp->client_iob->cur - csp->client_iob->buf;
+ size_t data_length = (size_t)(csp->client_iob->eod - csp->client_iob->cur);
+
+ assert(bytes_to_shift > 0);
+ assert(data_length > 0);
+
+ log_error(LOG_LEVEL_CONNECT, "Shifting %d pipelined bytes by %d bytes",
+ data_length, bytes_to_shift);
+ memmove(csp->client_iob->buf, csp->client_iob->cur, data_length);
+ csp->client_iob->cur = csp->client_iob->buf;
+ assert(csp->client_iob->eod == csp->client_iob->buf + bytes_to_shift + data_length);
+ csp->client_iob->eod = csp->client_iob->buf + data_length;
+ memset(csp->client_iob->eod, '\0', (size_t)bytes_to_shift);
+
+ csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
+ }
+ else
+ {
+ /*
+ * We mainly care about resetting client_iob->cur so we don't
+ * waste buffer space at the beginning and don't mess up the
+ * request restoration done by cgi_show_request().
+ *
+ * Freeing the buffer itself isn't technically necessary,
+ * but makes debugging more convenient.
+ */
+ clear_iob(csp->client_iob);
}
-#endif
-
- log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
- csp->ip_addr_str, http->ocmd, csp->content_length);
}
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
/*********************************************************************
* Returns : N/A
*
*********************************************************************/
-#ifdef AMIGA
-void serve(struct client_state *csp)
-#else /* ifndef AMIGA */
static void serve(struct client_state *csp)
-#endif /* def AMIGA */
{
- chat(csp);
+ int config_file_change_detected = 0; /* Only used for debugging */
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+#ifdef FEATURE_CONNECTION_SHARING
+ static int monitor_thread_running = 0;
+#endif /* def FEATURE_CONNECTION_SHARING */
+ int continue_chatting = 0;
- if (csp->sfd != JB_INVALID_SOCKET)
+ log_error(LOG_LEVEL_CONNECT, "Accepted connection from %s on socket %d",
+ csp->ip_addr_str, csp->cfd);
+
+ do
{
-#ifdef FEATURE_CONNECTION_KEEP_ALIVE
- static int monitor_thread_running = 0;
+ unsigned int latency;
+
+ chat(csp);
- if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
- && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
+ /*
+ * If the request has been crunched,
+ * the calculated latency is zero.
+ */
+ latency = (unsigned)(csp->server_connection.response_received -
+ csp->server_connection.request_sent) / 2;
+
+ if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
+ && (csp->flags & CSP_FLAG_CRUNCHED)
+ && (csp->expected_client_content_length != 0))
{
- remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
- close_socket(csp->cfd);
- csp->cfd = JB_INVALID_SOCKET;
- privoxy_mutex_lock(&connection_reuse_mutex);
- if (!monitor_thread_running)
+ csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
+ log_error(LOG_LEVEL_CONNECT,
+ "Tainting client socket %d due to unread data.", csp->cfd);
+ }
+
+ continue_chatting = (csp->config->feature_flags
+ & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
+ && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
+ && (csp->cfd != JB_INVALID_SOCKET)
+ && (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
+ && ((csp->flags & CSP_FLAG_SERVER_CONTENT_LENGTH_SET)
+ || (csp->flags & CSP_FLAG_CHUNKED));
+
+ if (!(csp->flags & CSP_FLAG_CRUNCHED)
+ && (csp->server_connection.sfd != JB_INVALID_SOCKET))
+ {
+ if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
+ {
+ csp->server_connection.keep_alive_timeout = csp->config->default_server_timeout;
+ }
+ if (!(csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
+ || (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
+ || !socket_is_still_alive(csp->server_connection.sfd)
+ || !(latency < csp->server_connection.keep_alive_timeout))
{
- monitor_thread_running = 1;
- privoxy_mutex_unlock(&connection_reuse_mutex);
- wait_for_alive_connections();
- privoxy_mutex_lock(&connection_reuse_mutex);
- monitor_thread_running = 0;
+ log_error(LOG_LEVEL_CONNECT,
+ "Closing server socket %d connected to %s. "
+ "Keep-alive %u. Tainted: %u. Socket alive %u. Timeout: %u.",
+ csp->server_connection.sfd, csp->server_connection.host,
+ 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
+ 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
+ socket_is_still_alive(csp->server_connection.sfd),
+ csp->server_connection.keep_alive_timeout);
+#ifdef FEATURE_CONNECTION_SHARING
+ if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
+ {
+ forget_connection(csp->server_connection.sfd);
+ }
+#endif /* def FEATURE_CONNECTION_SHARING */
+ close_socket(csp->server_connection.sfd);
+ mark_connection_closed(&csp->server_connection);
}
- privoxy_mutex_unlock(&connection_reuse_mutex);
}
- else
+
+ if (continue_chatting && any_loaded_file_changed(csp))
+ {
+ continue_chatting = 0;
+ config_file_change_detected = 1;
+ }
+
+ if (continue_chatting)
+ {
+ if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) != 0)
+ && socket_is_still_alive(csp->cfd))
+ {
+ log_error(LOG_LEVEL_CONNECT, "Client request %d has been "
+ "pipelined on socket %d and the socket is still alive.",
+ csp->requests_received_total+1, csp->cfd);
+ prepare_csp_for_next_request(csp);
+ continue;
+ }
+
+ if (0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE))
+ {
+ if (csp->server_connection.sfd != JB_INVALID_SOCKET)
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Waiting for the next client request on socket %d. "
+ "Keeping the server socket %d to %s open.",
+ csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
+ }
+ else
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Waiting for the next client request on socket %d. "
+ "No server socket to keep open.", csp->cfd);
+ }
+ }
+
+ if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
+ && data_is_available(csp->cfd, (int)csp->config->keep_alive_timeout)
+ && socket_is_still_alive(csp->cfd))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Client request %u arrived in time on socket %d.",
+ csp->requests_received_total+1, csp->cfd);
+ prepare_csp_for_next_request(csp);
+ }
+ else
+ {
+#ifdef FEATURE_CONNECTION_SHARING
+ if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
+ && (csp->server_connection.sfd != JB_INVALID_SOCKET)
+ && (socket_is_still_alive(csp->server_connection.sfd)))
+ {
+ time_t time_open = time(NULL) - csp->server_connection.timestamp;
+
+ if (csp->server_connection.keep_alive_timeout < time_open - (time_t)latency)
+ {
+ break;
+ }
+
+ remember_connection(&csp->server_connection);
+ csp->server_connection.sfd = JB_INVALID_SOCKET;
+ drain_and_close_socket(csp->cfd);
+ csp->cfd = JB_INVALID_SOCKET;
+ 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);
+ }
+#endif /* def FEATURE_CONNECTION_SHARING */
+ break;
+ }
+ }
+ else if (csp->server_connection.sfd != JB_INVALID_SOCKET)
{
- forget_connection(csp->sfd);
- close_socket(csp->sfd);
+ log_error(LOG_LEVEL_CONNECT,
+ "Closing server socket %d connected to %s. Keep-alive: %u. "
+ "Tainted: %u. Socket alive: %u. Timeout: %u. "
+ "Configuration file change detected: %u",
+ csp->server_connection.sfd, csp->server_connection.host,
+ 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
+ 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
+ socket_is_still_alive(csp->server_connection.sfd),
+ csp->server_connection.keep_alive_timeout,
+ config_file_change_detected);
}
+ } while (continue_chatting);
+
#else
- close_socket(csp->sfd);
+ chat(csp);
#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
+
+ if (csp->server_connection.sfd != JB_INVALID_SOCKET)
+ {
+#ifdef FEATURE_CONNECTION_SHARING
+ if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
+ {
+ forget_connection(csp->server_connection.sfd);
+ }
+#endif /* def FEATURE_CONNECTION_SHARING */
+ close_socket(csp->server_connection.sfd);
}
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+ mark_connection_closed(&csp->server_connection);
+#endif
+
if (csp->cfd != JB_INVALID_SOCKET)
{
- close_socket(csp->cfd);
+ log_error(LOG_LEVEL_CONNECT, "Closing client socket %d. "
+ "Keep-alive: %u. Socket alive: %u. Data available: %u. "
+ "Configuration file change detected: %u. Requests received: %u.",
+ csp->cfd, 0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE),
+ socket_is_still_alive(csp->cfd), data_is_available(csp->cfd, 0),
+ config_file_change_detected, csp->requests_received_total);
+ drain_and_close_socket(csp->cfd);
}
+ free_csp_resources(csp);
+
csp->flags &= ~CSP_FLAG_ACTIVE;
}
* Returns : No. ,-)
*
*********************************************************************/
-static void usage(const char *myname)
+static void usage(const char *name)
{
printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
- "Usage: %s "
+ "Usage: %s [--config-test] "
#if defined(unix)
"[--chroot] "
#endif /* defined(unix) */
#if defined(unix)
"[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
#endif /* defined(unix) */
- "[--version] [configfile]\n"
- "Aborting\n", myname);
+ "[--version] [configfile]\n",
+ name);
+
+#ifdef FUZZ
+ show_fuzz_usage(name);
+#endif
+
+ printf("Aborting\n");
exit(2);
/*
* Prepare global mutex semaphores
*/
+
+#ifdef FEATURE_HTTPS_INSPECTION
+ privoxy_mutex_init(&certificate_mutex);
+ privoxy_mutex_init(&rng_mutex);
+#endif
+
privoxy_mutex_init(&log_mutex);
privoxy_mutex_init(&log_init_mutex);
privoxy_mutex_init(&connection_reuse_mutex);
+#ifdef FEATURE_EXTERNAL_FILTERS
+ privoxy_mutex_init(&external_filter_mutex);
+#endif
+#ifdef FEATURE_CLIENT_TAGS
+ privoxy_mutex_init(&client_tags_mutex);
+#endif
/*
* XXX: The assumptions below are a bit naive
privoxy_mutex_init(&localtime_mutex);
#endif /* ndef HAVE_GMTIME_R */
-#ifndef HAVE_RANDOM
+#if !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM)
privoxy_mutex_init(&rand_mutex);
-#endif /* ndef HAVE_RANDOM */
+#endif /* !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM) */
+
#endif /* def MUTEX_LOCKS_AVAILABLE */
}
-
/*********************************************************************
*
* Function : main
*
*********************************************************************/
#ifdef __MINGW32__
-int real_main(int argc, const char *argv[])
+int real_main(int argc, char **argv)
#else
-int main(int argc, const char *argv[])
+int main(int argc, char **argv)
#endif
{
int argc_pos = 0;
+ int do_config_test = 0;
+#ifndef HAVE_ARC4RANDOM
unsigned int random_seed;
+#endif
#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
+#ifdef FUZZ
+ char *fuzz_input_type = NULL;
+ char *fuzz_input_file = NULL;
+#endif
Argc = argc;
Argv = argv;
const char *pName = argv[argc_pos] + 9;
if (*pName == ':')
pName++;
- exit( (install_service(pName)) ? 0 : 1 );
+ exit((install_service(pName)) ? 0 : 1);
}
- else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
+ 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)
+ else if (strcmp(argv[argc_pos], "--service") == 0)
{
bRunAsService = TRUE;
w32_set_service_cwd();
usage(argv[0]);
}
- else if(strcmp(argv[argc_pos], "--version") == 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)
+ else if (strcmp(argv[argc_pos], "--no-daemon") == 0)
{
set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
- no_daemon = 1;
+ daemon_mode = 0;
}
- else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
+ else if (strcmp(argv[argc_pos], "--pidfile") == 0)
{
if (++argc_pos == argc) usage(argv[0]);
- pidfile = strdup(argv[argc_pos]);
+ pidfile = strdup_or_die(argv[argc_pos]);
}
- else if (strcmp(argv[argc_pos], "--user" ) == 0)
+ else if (strcmp(argv[argc_pos], "--user") == 0)
{
+ char *user_arg;
+ char *group_name;
+
if (++argc_pos == argc) usage(argv[argc_pos]);
- if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
+ user_arg = strdup_or_die(argv[argc_pos]);
+ group_name = strchr(user_arg, '.');
+ if (NULL != group_name)
{
- *p++ = '\0';
- if (NULL == (grp = getgrnam(p)))
+ /* Nul-terminate the user name */
+ *group_name = '\0';
+
+ /* Skip the former delimiter to actually reach the group name */
+ group_name++;
+
+ grp = getgrnam(group_name);
+ if (NULL == grp)
{
- log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
+ log_error(LOG_LEVEL_FATAL, "Group '%s' not found.", group_name);
}
}
-
- if (NULL == (pw = getpwnam(argv[argc_pos])))
+ pw = getpwnam(user_arg);
+ if (NULL == pw)
{
- log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
+ log_error(LOG_LEVEL_FATAL, "User '%s' not found.", user_arg);
}
- if (p != NULL) *--p = '\0';
+ freez(user_arg);
}
- else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 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]);
+ pre_chroot_nslookup_to_load_resolver = strdup_or_die(argv[argc_pos]);
}
- else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
+ else if (strcmp(argv[argc_pos], "--chroot") == 0)
{
do_chroot = 1;
}
#endif /* defined(unix) */
+ else if (strcmp(argv[argc_pos], "--config-test") == 0)
+ {
+ do_config_test = 1;
+ }
+#ifdef FUZZ
+ else if (strcmp(argv[argc_pos], "--fuzz") == 0)
+ {
+ argc_pos++;
+ if (argc < argc_pos + 2) usage(argv[0]);
+ fuzz_input_type = argv[argc_pos];
+ argc_pos++;
+ fuzz_input_file = argv[argc_pos];
+ }
+ else if (strcmp(argv[argc_pos], "--stfu") == 0)
+ {
+ set_debug_level(LOG_LEVEL_STFU);
+ }
+#endif
else if (argc_pos + 1 != argc)
{
/*
show_version(Argv[0]);
#if defined(unix)
- if ( *configfile != '/' )
+ if (*configfile != '/')
{
char cwd[BUFFER_SIZE];
char *abs_file;
- size_t abs_file_size;
+ size_t abs_file_size;
/* make config-filename absolute here */
if (NULL == getcwd(cwd, sizeof(cwd)))
{
perror("failed to get current working directory");
- exit( 1 );
+ exit(1);
}
+ basedir = strdup_or_die(cwd);
/* 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 );
- }
+ abs_file = malloc_or_die(abs_file_size);
strlcpy(abs_file, basedir, abs_file_size);
- strlcat(abs_file, "/", abs_file_size );
+ strlcat(abs_file, "/", abs_file_size);
strlcat(abs_file, configfile, abs_file_size);
configfile = abs_file;
}
clients->next = NULL;
/* XXX: factor out initialising after the next stable release. */
-#ifdef AMIGA
- InitAmiga();
-#elif defined(_WIN32)
+#ifdef _WIN32
InitWin32();
#endif
+#ifndef HAVE_ARC4RANDOM
random_seed = (unsigned int)time(NULL);
#ifdef HAVE_RANDOM
srandom(random_seed);
#else
srand(random_seed);
#endif /* ifdef HAVE_RANDOM */
+#endif /* ifndef HAVE_ARC4RANDOM */
/*
* 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?)
+ *
+ * Ignore the broken pipe signal as connection failures
+ * are handled when and where they occur without relying
+ * on a signal.
*/
-#if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
+#if !defined(_WIN32) && !defined(__OS2__)
{
int idx;
- const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
- const int ignored_signals[] = { SIGPIPE, 0 };
+ const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP };
- for (idx = 0; catched_signals[idx] != 0; idx++)
+ for (idx = 0; idx < SZ(catched_signals); idx++)
{
-#ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
+#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)
}
}
- for (idx = 0; ignored_signals[idx] != 0; idx++)
+ if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
{
- 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]);
- }
+ log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for SIGPIPE: %E");
}
}
# endif /* def _WIN_CONSOLE */
#endif /* def _WIN32 */
+#ifdef FUZZ
+ if (fuzz_input_type != NULL)
+ {
+ exit(process_fuzzed_input(fuzz_input_type, fuzz_input_file));
+ }
+ log_error(LOG_LEVEL_FATAL,
+ "When compiled with fuzzing support, Privoxy should only be used for fuzzing. "
+ "Various data structures are static which is unsafe when using threads.");
+#endif
+
+ if (do_config_test)
+ {
+ exit(NULL == load_config());
+ }
/* Initialize the CGI subsystem */
cgi_init_error_messages();
/*
- * If runnig on unix and without the --nodaemon
+ * If running on unix and without the --no-daemon
* option, become a daemon. I.e. fork, detach
* from tty and get process group leadership
*/
#if defined(unix)
{
- pid_t pid = 0;
-#if 0
- int fd;
-#endif
-
- if (!no_daemon)
+ if (daemon_mode)
{
- pid = fork();
+ int fd;
+ pid_t pid = fork();
- if ( pid < 0 ) /* error */
+ if (pid < 0) /* error */
{
perror("fork");
- exit( 3 );
+ exit(3);
}
- else if ( pid != 0 ) /* parent */
+ 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 )
+ sleep(1);
+ wpid = waitpid(pid, &status, WNOHANG);
+ if (wpid != 0)
{
- exit( 1 );
+ exit(1);
}
- exit( 0 );
+ exit(0);
}
/* child */
-#if 1
- /* Should be more portable, but not as well tested */
+
setsid();
-#else /* !1 */
-#ifdef __FreeBSD__
- setpgrp(0,0);
-#else /* ndef __FreeBSD__ */
- setpgrp();
-#endif /* ndef __FreeBSD__ */
- fd = open("/dev/tty", O_RDONLY);
- if ( fd )
- {
- /* no error check here */
- ioctl( fd, TIOCNOTTY,0 );
- close ( fd );
- }
-#endif /* 1 */
+
/*
* stderr (fd 2) will be closed later on,
* when the config file has been parsed.
*/
+ close(0);
+ close(1);
+
+ /*
+ * Reserve fd 0 and 1 to prevent abort() and friends
+ * from sending stuff to the clients or servers.
+ */
+ fd = open("/dev/null", O_RDONLY);
+ if (fd == -1)
+ {
+ log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
+ }
+ else if (fd != 0)
+ {
+ if (dup2(fd, 0) == -1)
+ {
+ log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 0: %E");
+ }
+ close(fd);
+ }
+ fd = open("/dev/null", O_WRONLY);
+ if (fd == -1)
+ {
+ log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
+ }
+ else if (fd != 1)
+ {
+ if (dup2(fd, 1) == -1)
+ {
+ log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 1: %E");
+ }
+ close(fd);
+ }
+
+#ifdef FEATURE_EXTERNAL_FILTERS
+ for (fd = 0; fd < 3; fd++)
+ {
+ mark_socket_for_close_on_execute(fd);
+ }
+#endif
- close( 0 );
- close( 1 );
chdir("/");
- } /* -END- if (!no_daemon) */
+ } /* -END- if (daemon_mode) */
/*
* 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 (pidfile != NULL)
+ {
+ write_pid_file(pidfile);
+ }
if (NULL != pw)
{
if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
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)
*/
if (bRunAsService)
{
- /* Yup, so now we must attempt to establish a connection
+ /* 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
* on failure.
*
* Parameters :
- * 1 : config = Privoxy configuration. Specifies port
- * to bind to.
+ * 1 : haddr = Host address to bind to. Use NULL to bind to
+ * INADDR_ANY.
+ * 2 : hport = Specifies port to bind to.
+ * 3 : backlog = Listen backlog.
*
* Returns : Port that was opened.
*
*********************************************************************/
-static jb_socket bind_port_helper(struct configuration_spec * config)
+static jb_socket bind_port_helper(const char *haddr, int hport, int backlog)
{
int result;
jb_socket bfd;
- if (config->haddr == NULL)
+ result = bind_port(haddr, hport, backlog, &bfd);
+
+ if (result < 0)
+ {
+ const char *bind_address = (NULL != haddr) ? haddr : "INADDR_ANY";
+ 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",
+ bind_address, hport, hport);
+
+ case -2:
+ log_error(LOG_LEVEL_FATAL,
+ "can't bind to %s:%d: The hostname is not resolvable",
+ bind_address, hport);
+
+ default:
+ log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: %E",
+ bind_address, hport);
+ }
+
+ /* shouldn't get here */
+ return JB_INVALID_SOCKET;
+ }
+
+#ifndef HAVE_POLL
+#ifndef _WIN32
+ if (bfd >= FD_SETSIZE)
+ {
+ log_error(LOG_LEVEL_FATAL,
+ "Bind socket number too high to use select(): %d >= %d",
+ bfd, FD_SETSIZE);
+ }
+#endif
+#endif
+
+ if (haddr == NULL)
{
log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
- config->hport);
+ hport);
}
else
{
log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
- config->hport, config->haddr);
+ hport, haddr);
}
- result = bind_port(config->haddr, config->hport, &bfd);
+ return bfd;
+}
+
- if (result < 0)
+/*********************************************************************
+ *
+ * Function : bind_ports_helper
+ *
+ * Description : Bind the listen ports. Handles logging, and aborts
+ * on failure.
+ *
+ * Parameters :
+ * 1 : config = Privoxy configuration. Specifies ports
+ * to bind to.
+ * 2 : sockets = Preallocated array of opened sockets
+ * corresponding to specification in config.
+ * All non-opened sockets will be set to
+ * JB_INVALID_SOCKET.
+ *
+ * Returns : Nothing. Inspect sockets argument.
+ *
+ *********************************************************************/
+static void bind_ports_helper(struct configuration_spec * config,
+ jb_socket sockets[])
+{
+ int i;
+
+ for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
{
- switch(result)
+ if (config->hport[i])
{
- 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);
+ sockets[i] = bind_port_helper(config->haddr[i],
+ config->hport[i], config->listen_backlog);
+#if defined(FEATURE_ACCEPT_FILTER) && defined(SO_ACCEPTFILTER)
+ if (config->enable_accept_filter && sockets[i] != JB_INVALID_SOCKET)
+ {
+ struct accept_filter_arg af_options;
+ bzero(&af_options, sizeof(af_options));
+ strlcpy(af_options.af_name, "httpready", sizeof(af_options.af_name));
+ if (setsockopt(sockets[i], SOL_SOCKET, SO_ACCEPTFILTER, &af_options,
+ sizeof(af_options)))
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Enabling accept filter for socket %d failed: %E", sockets[i]);
+ }
+ }
+#endif
+ }
+ else
+ {
+ sockets[i] = JB_INVALID_SOCKET;
}
-
- /* shouldn't get here */
- return JB_INVALID_SOCKET;
}
-
config->need_bind = 0;
+}
- return bfd;
+
+/*********************************************************************
+ *
+ * Function : close_ports_helper
+ *
+ * Description : Close listenings ports.
+ *
+ * Parameters :
+ * 1 : sockets = Array of opened and non-opened sockets to
+ * close. All sockets will be set to
+ * JB_INVALID_SOCKET.
+ *
+ * Returns : Nothing.
+ *
+ *********************************************************************/
+static void close_ports_helper(jb_socket sockets[])
+{
+ int i;
+
+ for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
+ {
+ if (JB_INVALID_SOCKET != sockets[i])
+ {
+ close_socket(sockets[i]);
+ }
+ sockets[i] = JB_INVALID_SOCKET;
+ }
}
*********************************************************************/
static void listen_loop(void)
{
+ struct client_states *csp_list = NULL;
struct client_state *csp = NULL;
- jb_socket bfd;
- struct configuration_spec * config;
+ jb_socket bfds[MAX_LISTENING_SOCKETS];
+ struct configuration_spec *config;
+ unsigned int active_threads = 0;
+#if defined(FEATURE_PTHREAD)
+ pthread_attr_t attrs;
+
+ pthread_attr_init(&attrs);
+ pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
+#endif
config = load_config();
-#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+#ifdef FEATURE_CONNECTION_SHARING
/*
* XXX: Should be relocated once it no
* longer needs to emit log messages.
*/
initialize_reusable_connections();
-#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
+#endif /* def FEATURE_CONNECTION_SHARING */
- bfd = bind_port_helper(config);
+ bind_ports_helper(config, bfds);
#ifdef FEATURE_GRACEFUL_TERMINATION
while (!g_terminate)
for (;;)
#endif
{
-#if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
+#if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(__OS2__)
while (waitpid(-1, NULL, WNOHANG) > 0)
{
/* zombie children */
}
-#endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
+#endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) */
/*
* Free data that was used by died threads
*/
- sweep();
+ active_threads = sweep();
#if defined(unix)
/*
}
#endif
- if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
+ csp_list = zalloc_or_die(sizeof(*csp_list));
+ csp = &csp_list->csp;
+
+ log_error(LOG_LEVEL_CONNECT,
+ "Waiting for the next client connection. Currently active threads: %d",
+ active_threads);
+
+ /*
+ * This config may be outdated, but for accept_connection()
+ * it's fresh enough.
+ */
+ csp->config = config;
+
+ if (!accept_connection(csp, bfds))
{
- log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
+ log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
+ freez(csp_list);
continue;
}
csp->flags |= CSP_FLAG_ACTIVE;
- csp->sfd = JB_INVALID_SOCKET;
+ csp->server_connection.sfd = JB_INVALID_SOCKET;
csp->config = config = load_config();
- if ( config->need_bind )
+ if (config->need_bind)
{
/*
* Since we were listening to the "old port", we will not see
- * a "listen" param change until the next IJB request. So, at
+ * a "listen" param change until the next request. So, at
* least 1 more request must be made for us to find the new
* setting. I am simply closing the old socket and binding the
* new one.
*
* Which-ever is correct, we will serve 1 more page via the
- * old settings. This should probably be a "show-proxy-args"
+ * old settings. This should probably be a "show-status"
* request. This should not be a so common of an operation
* that this will hurt people's feelings.
*/
- close_socket(bfd);
-
- bfd = bind_port_helper(config);
- }
-
- log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
-
- if (!accept_connection(csp, bfd))
- {
- log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
+ close_ports_helper(bfds);
-#ifdef AMIGA
- if(!childs)
- {
- exit(1);
- }
-#endif
- freez(csp);
- continue;
- }
- else
- {
- log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
+ bind_ports_helper(config, bfds);
}
#ifdef FEATURE_TOGGLE
#ifdef FEATURE_ACL
if (block_acl(NULL,csp))
{
- log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
+ log_error(LOG_LEVEL_CONNECT,
+ "Connection from %s on %s (socket %d) dropped due to ACL",
+ csp->ip_addr_str, csp->listen_addr_str, csp->cfd);
close_socket(csp->cfd);
- freez(csp);
+ freez(csp->ip_addr_str);
+ freez(csp->listen_addr_str);
+ freez(csp_list);
continue;
}
#endif /* def FEATURE_ACL */
+ if ((0 != config->max_client_connections)
+ && (active_threads >= config->max_client_connections))
+ {
+ log_error(LOG_LEVEL_CONNECT,
+ "Rejecting connection from %s. Maximum number of connections reached.",
+ csp->ip_addr_str);
+ write_socket_delayed(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
+ strlen(TOO_MANY_CONNECTIONS_RESPONSE), get_write_delay(csp));
+ close_socket(csp->cfd);
+ freez(csp->ip_addr_str);
+ freez(csp->listen_addr_str);
+ freez(csp_list);
+ continue;
+ }
+
/* add it to the list of clients */
- csp->next = clients->next;
- clients->next = csp;
+ csp_list->next = clients->next;
+ clients->next = csp_list;
if (config->multi_threaded)
{
int child_id;
-/* this is a switch () statment in the C preprocessor - ugh */
+/* this is a switch () statement in the C preprocessor - ugh */
#undef SELECTED_ONE_OPTION
/* Use Pthreads in preference to native code */
#define SELECTED_ONE_OPTION
{
pthread_t the_thread;
- pthread_attr_t attrs;
- pthread_attr_init(&attrs);
- pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
errno = pthread_create(&the_thread, &attrs,
(void * (*)(void *))serve, csp);
child_id = errno ? -1 : 0;
- pthread_attr_destroy(&attrs);
}
#endif
}
#endif
-#if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
-#define SELECTED_ONE_OPTION
- csp->cfd = ReleaseSocket(csp->cfd, -1);
-
-#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;
- Signal((struct Task *)child_id, SIGF_SINGLE);
- Wait(SIGF_SINGLE);
- }
-#endif
-
#if !defined(SELECTED_ONE_OPTION)
child_id = fork();
serve(csp);
- /*
+ /*
* If we've been toggled or we've blocked the request, tell Mom
*/
}
#endif /* def FEATURE_TOGGLE */
-#ifdef FEATURE_STATISTICS
+#ifdef FEATURE_STATISTICS
if (csp->flags & CSP_FLAG_REJECTED)
{
rc |= RC_FLAG_BLOCKED;
int child_status;
#if !defined(_WIN32) && !defined(__CYGWIN__)
- wait( &child_status );
+ wait(&child_status);
- /*
+ /*
* Evaluate child's return code: If the child has
* - been toggled, toggle ourselves
* - blocked its request, bump up the stats counter
{
urls_rejected++;
}
-#endif /* def FEATURE_STATISTICS */
+#endif /* def FEATURE_STATISTICS */
#endif /* !defined(_WIN32) && defined(__CYGWIN__) */
close_socket(csp->cfd);
* XXX: If you assume ...
*/
log_error(LOG_LEVEL_ERROR,
- "Unable to take any additional connections: %E");
- write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
- strlen(TOO_MANY_CONNECTIONS_RESPONSE));
+ "Unable to take any additional connections: %E. Active threads: %d",
+ active_threads);
+ write_socket_delayed(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
+ strlen(TOO_MANY_CONNECTIONS_RESPONSE), get_write_delay(csp));
close_socket(csp->cfd);
csp->flags &= ~CSP_FLAG_ACTIVE;
}
}
}
+#if defined(FEATURE_PTHREAD)
+ pthread_attr_destroy(&attrs);
+#endif
+
/* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
+#ifdef FEATURE_HTTPS_INSPECTION
/* Clean up. Aim: free all memory (no leaks) */
+ if (rng_seeded == 1)
+ {
+ mbedtls_ctr_drbg_free(&ctr_drbg);
+ mbedtls_entropy_free(&entropy);
+ }
+#endif
+
#ifdef FEATURE_GRACEFUL_TERMINATION
log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
#if defined(unix)
freez(basedir);
#endif
- freez(configfile);
#if defined(_WIN32) && !defined(_WIN_CONSOLE)
/* Cleanup - remove taskbar icon etc. */
projects / privoxy.git / blobdiff