1 const char jcc_rcs[] = "$Id: jcc.c,v 1.87 2002/03/26 22:29:54 swa Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/jcc.c,v $
6 * Purpose : Main file. Contains main() method, main loop, and
7 * the main connection-handling function.
9 * Copyright : Written by and Copyright (C) 2001 the SourceForge
10 * Privoxy team. http://www.privoxy.org/
12 * Based on the Internet Junkbuster originally written
13 * by and Copyright (C) 1997 Anonymous Coders and
14 * Junkbusters Corporation. http://www.junkbusters.com
16 * This program is free software; you can redistribute it
17 * and/or modify it under the terms of the GNU General
18 * Public License as published by the Free Software
19 * Foundation; either version 2 of the License, or (at
20 * your option) any later version.
22 * This program is distributed in the hope that it will
23 * be useful, but WITHOUT ANY WARRANTY; without even the
24 * implied warranty of MERCHANTABILITY or FITNESS FOR A
25 * PARTICULAR PURPOSE. See the GNU General Public
26 * License for more details.
28 * The GNU General Public License should be included with
29 * this file. If not, you can view it at
30 * http://www.gnu.org/copyleft/gpl.html
31 * or write to the Free Software Foundation, Inc., 59
32 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
36 * Revision 1.87 2002/03/26 22:29:54 swa
37 * we have a new homepage!
39 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
40 * Workaround for closing the jarfile before load_config() comes around again
42 * Revision 1.85 2002/03/24 15:23:33 jongfoster
45 * Revision 1.84 2002/03/24 13:25:43 swa
46 * name change related issues
48 * Revision 1.83 2002/03/16 23:54:06 jongfoster
49 * Adding graceful termination feature, to help look for memory leaks.
50 * If you enable this (which, by design, has to be done by hand
51 * editing config.h) and then go to http://i.j.b/die, then the program
52 * will exit cleanly after the *next* request. It should free all the
53 * memory that was used.
55 * Revision 1.82 2002/03/13 00:27:05 jongfoster
58 * Revision 1.81 2002/03/12 01:42:50 oes
59 * Introduced modular filters
61 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
62 * OS/2 port maintenance:
63 * - Fixed EMX build - it had decayed a little
64 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
65 * substituted a memset for now.
67 * Revision 1.79 2002/03/09 20:03:52 jongfoster
68 * - Making various functions return int rather than size_t.
69 * (Undoing a recent change). Since size_t is unsigned on
70 * Windows, functions like read_socket that return -1 on
71 * error cannot return a size_t.
73 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
74 * crashes, and also frequently caused JB to jump to 100%
75 * CPU and stay there. (Because it thought it had just
76 * read ((unsigned)-1) == 4Gb of data...)
78 * - The signature of write_socket has changed, it now simply
79 * returns success=0/failure=nonzero.
81 * - Trying to get rid of a few warnings --with-debug on
82 * Windows, I've introduced a new type "jb_socket". This is
83 * used for the socket file descriptors. On Windows, this
84 * is SOCKET (a typedef for unsigned). Everywhere else, it's
85 * an int. The error value can't be -1 any more, so it's
86 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
87 * Windows it maps to the #define INVALID_SOCKET.)
89 * - The signature of bind_port has changed.
91 * Revision 1.78 2002/03/08 21:35:04 oes
92 * Added optional group supplement to --user option. Will now use default group of user if no group given
94 * Revision 1.77 2002/03/07 03:52:06 oes
95 * - Fixed compiler warnings etc
96 * - Improved handling of failed DNS lookups
98 * Revision 1.76 2002/03/06 22:54:35 jongfoster
99 * Automated function-comment nitpicking.
101 * Revision 1.75 2002/03/06 10:02:19 oes
102 * Fixed stupid bug when --user was not given
104 * Revision 1.74 2002/03/06 00:49:31 jongfoster
105 * Fixing warning on Windows
106 * Making #ifdefs that refer to the same variable consistently
107 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
109 * Revision 1.73 2002/03/05 23:57:30 hal9
110 * Stray character 's' on line 1618 was breaking build.
112 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
113 * - Re-enable OS/2 building after new parms were added
114 * - Fix false out of memory report when resolving CGI templates when no IP
115 * address is available of failed attempt (a la no such domain)
117 * Revision 1.71 2002/03/05 18:13:56 oes
118 * Added --user option
120 * Revision 1.70 2002/03/05 04:52:42 oes
121 * Deleted non-errlog debugging code
123 * Revision 1.69 2002/03/04 23:50:00 jongfoster
124 * Splitting off bind_port() call into bind_port_helper(), with
127 * Revision 1.68 2002/03/04 20:17:32 oes
130 * Revision 1.67 2002/03/04 18:18:57 oes
131 * - Removed _DEBUG mode
132 * - Cleand up cmdline parsing
133 * - Introduced --no-daemon, --pidfile options
134 * - Cleaned up signal handling:
135 * - Terminate cleanly on INT, TERM and ABRT
136 * - Schedule logfile for re-opening on HUP
137 * - Ignore CHLD and PIPE
138 * - Leave the rest with their default handlers
139 * - Uniform handler registration
140 * - Added usage() function
141 * - Played styleguide police
143 * Revision 1.66 2002/03/03 15:06:55 oes
144 * Re-enabled automatic config reloading
146 * Revision 1.65 2002/03/03 14:49:11 oes
147 * Fixed CLF logging: Now uses client's original HTTP request
149 * Revision 1.64 2002/03/03 09:18:03 joergs
150 * Made jumbjuster work on AmigaOS again.
152 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
153 * Clean up a little CRLF unpleasantness that suddenly appeared
155 * Revision 1.62 2002/02/20 23:17:23 jongfoster
156 * Detecting some out-of memory conditions and exiting with a log message.
158 * Revision 1.61 2002/01/17 21:01:52 jongfoster
159 * Moving all our URL and URL pattern parsing code to urlmatch.c.
161 * Revision 1.60 2001/12/30 14:07:32 steudten
162 * - Add signal handling (unix)
163 * - Add SIGHUP handler (unix)
164 * - Add creation of pidfile (unix)
165 * - Add action 'top' in rc file (RH)
166 * - Add entry 'SIGNALS' to manpage
167 * - Add exit message to logfile (unix)
169 * Revision 1.59 2001/12/13 14:07:18 oes
170 * Fixed Bug: 503 error page now sent OK
172 * Revision 1.58 2001/11/30 23:37:24 jongfoster
173 * Renaming the Win32 config file to config.txt - this is almost the
174 * same as the corresponding UNIX name "config"
176 * Revision 1.57 2001/11/16 00:47:43 jongfoster
177 * Changing the tty-disconnection code to use setsid().
179 * Revision 1.56 2001/11/13 20:20:54 jongfoster
180 * Tabs->spaces, fixing a bug with missing {} around an if()
182 * Revision 1.55 2001/11/13 20:14:53 jongfoster
183 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
185 * Revision 1.54 2001/11/07 00:03:14 steudten
186 * Give reliable return value if an error
187 * occurs not just 0 with new daemon mode.
189 * Revision 1.53 2001/11/05 21:41:43 steudten
190 * Add changes to be a real daemon just for unix os.
191 * (change cwd to /, detach from controlling tty, set
192 * process group and session leader to the own process.
194 * Add some fatal-error log message for failed malloc().
195 * Add '-d' if compiled with 'configure --with-debug' to
196 * enable debug output.
198 * Revision 1.52 2001/10/26 20:11:20 jongfoster
199 * Fixing type mismatch
201 * Revision 1.51 2001/10/26 17:38:28 oes
204 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
205 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
206 * threads to call select() simultaneously. So, it's time to do a real, live,
207 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
208 * (native). Both versions will work, but using __OS2__ offers multi-threading.
210 * Revision 1.49 2001/10/23 21:41:35 jongfoster
211 * Added call to initialize the (statically-allocated of course)
212 * "out of memory" CGI response.
214 * Revision 1.48 2001/10/10 19:56:46 jongfoster
215 * Moving some code that wasn't cookie-related out of an #ifdef
218 * Revision 1.47 2001/10/10 16:44:36 oes
219 * Added CONNECT destination port limitation check
221 * Revision 1.46 2001/10/08 15:17:41 oes
222 * Re-enabled SSL forwarding
224 * Revision 1.45 2001/10/07 15:42:11 oes
225 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
227 * Moved downgrading of the HTTP version from parse_http_request to
228 * chat(), since we can't decide if it is necessary before we have
229 * determined the actions for the URL. The HTTP command is now
230 * *always* re-built so the repairs need no longer be special-cased.
232 * filter_popups now gets a csp pointer so it can raise the new
233 * CSP_FLAG_MODIFIED flag.
237 * Added configurable size limit for the IOB. If the IOB grows so
238 * large that the next read would exceed the limit, the header
239 * is generated, and the header & unfiltered buffer are flushed
240 * to the client. Chat then continues in non-buffering,
241 * non-filtering body mode.
243 * Revision 1.44 2001/10/02 18:13:57 oes
246 * Revision 1.43 2001/10/02 15:32:13 oes
247 * Moved generation of hdr
249 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
250 * Cleaning up 2 compiler warnings on OS/2.
252 * Revision 1.41 2001/09/16 17:05:14 jongfoster
253 * Removing unused #include showarg.h
255 * Revision 1.40 2001/09/16 15:41:45 jongfoster
256 * Fixing signed/unsigned comparison warning.
258 * Revision 1.39 2001/09/16 13:21:27 jongfoster
259 * Changes to use new list functions.
261 * Revision 1.38 2001/09/16 13:01:46 jongfoster
262 * Removing redundant function call that zeroed zalloc()'d memory.
264 * Revision 1.37 2001/09/10 11:12:24 oes
265 * Deleted unused variable
267 * Revision 1.36 2001/09/10 10:56:15 oes
268 * Silenced compiler warnings
270 * Revision 1.35 2001/07/31 14:44:22 oes
271 * Deleted unused size parameter from filter_popups()
273 * Revision 1.34 2001/07/30 22:08:36 jongfoster
274 * Tidying up #defines:
275 * - All feature #defines are now of the form FEATURE_xxx
276 * - Permanently turned off WIN_GUI_EDIT
277 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
279 * Revision 1.33 2001/07/29 19:32:00 jongfoster
280 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
282 * Revision 1.32 2001/07/29 18:47:05 jongfoster
283 * Adding missing #include "loadcfg.h"
285 * Revision 1.31 2001/07/29 12:17:48 oes
286 * Applied pthread fix by Paul Lieverse
288 * Revision 1.30 2001/07/25 22:57:13 jongfoster
289 * __BEOS__ no longer overrides FEATURE_PTHREAD.
290 * This is because FEATURE_PTHREAD will soon be widely used, so I
291 * want to keep it simple.
293 * Revision 1.29 2001/07/24 12:47:06 oes
294 * Applied BeOS support update by Eugenia
296 * Revision 1.28 2001/07/23 13:26:12 oes
297 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
299 * Revision 1.27 2001/07/19 19:09:47 haroon
300 * - Added code to take care of the situation where while processing the first
301 * server response (which includes the server header), after finding the end
302 * of the headers we were not looking past the end of the headers for
303 * content modification. I enabled it for filter_popups.
304 * Someone else should look to see if other similar operations should be
305 * done to the discarded portion of the buffer.
307 * Note 2001/07/20: No, the other content modification mechanisms will process
308 * the whole iob later anyway. --oes
310 * Revision 1.26 2001/07/18 12:31:36 oes
313 * Revision 1.25 2001/07/15 19:43:49 jongfoster
314 * Supports POSIX threads.
315 * Also removed some unused #includes.
317 * Revision 1.24 2001/07/13 14:00:40 oes
318 * - Generic content modification scheme:
319 * Each feature has its own applicability flag that is set
320 * from csp->action->flags.
321 * Replaced the "filtering" int flag , by a function pointer
322 * "content_filter" to the function that will do the content
323 * modification. If it is != NULL, the document will be buffered
324 * and processed through *content_filter, which must set
325 * csp->content_length and return a modified copy of the body
326 * or return NULL (on failiure).
327 * - Changed csp->is_text to the more generic bitmap csp->content_type
328 * which can currently take the valued CT_TEXT or CT_GIF
330 * - Removed all #ifdef PCRS
332 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
333 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
334 * the `block_acl' call. This prevents a compilation error when the user
335 * does not wish to use the "ACL" feature.
337 * Revision 1.22 2001/06/29 21:45:41 oes
338 * Indentation, CRLF->LF, Tab-> Space
340 * Revision 1.21 2001/06/29 13:29:36 oes
341 * - Cleaned up, improved comments
342 * - Unified all possible interceptors (CGI,
343 * block, trust, fast_redirect) in one
344 * place, with one (CGI) answer generation
345 * mechansim. Much clearer now.
346 * - Removed the GIF image generation, which
347 * is now done in filters.c:block_url()
348 * - Made error conditions like domain lookup
349 * failiure or (various) problems while talking
350 * to the server use cgi.c:error_response()
351 * instead of generating HTML/HTTP in chat() (yuck!)
352 * - Removed logentry from cancelled commit
354 * Revision 1.20 2001/06/09 10:55:28 jongfoster
355 * Changing BUFSIZ ==> BUFFER_SIZE
357 * Revision 1.19 2001/06/07 23:12:52 jongfoster
358 * Replacing function pointer in struct gateway with a directly
359 * called function forwarded_connect().
360 * Replacing struct gateway with struct forward_spec
362 * Revision 1.18 2001/06/03 19:12:16 oes
363 * introduced new cgi handling
365 * Revision 1.17 2001/06/01 20:07:23 jongfoster
366 * Now uses action +image-blocker{} rather than config->tinygif
368 * Revision 1.16 2001/06/01 18:49:17 jongfoster
369 * Replaced "list_share" with "list" - the tiny memory gain was not
370 * worth the extra complexity.
372 * Revision 1.15 2001/05/31 21:24:47 jongfoster
373 * Changed "permission" to "action" throughout.
374 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
375 * Moved vanilla wafer check into chat(), since we must now
376 * decide whether or not to add it based on the URL.
378 * Revision 1.14 2001/05/29 20:14:01 joergs
379 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
382 * Revision 1.13 2001/05/29 09:50:24 jongfoster
383 * Unified blocklist/imagelist/permissionslist.
384 * File format is still under discussion, but the internal changes
387 * Also modified interceptor behaviour:
388 * - We now intercept all URLs beginning with one of the following
389 * prefixes (and *only* these prefixes):
391 * * http://ijbswa.sf.net/config/
392 * * http://ijbswa.sourceforge.net/config/
393 * - New interceptors "home page" - go to http://i.j.b/ to see it.
394 * - Internal changes so that intercepted and fast redirect pages
395 * are not replaced with an image.
396 * - Interceptors now have the option to send a binary page direct
397 * to the client. (i.e. ijb-send-banner uses this)
398 * - Implemented show-url-info interceptor. (Which is why I needed
399 * the above interceptors changes - a typical URL is
400 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
401 * The previous mechanism would not have intercepted that, and
402 * if it had been intercepted then it then it would have replaced
405 * Revision 1.12 2001/05/27 22:17:04 oes
407 * - re_process_buffer no longer writes the modified buffer
408 * to the client, which was very ugly. It now returns the
409 * buffer, which it is then written by chat.
411 * - content_length now adjusts the Content-Length: header
412 * for modified documents rather than crunch()ing it.
413 * (Length info in csp->content_length, which is 0 for
414 * unmodified documents)
416 * - For this to work, sed() is called twice when filtering.
418 * Revision 1.11 2001/05/26 17:27:53 jongfoster
419 * Added support for CLF and fixed LOG_LEVEL_LOG.
420 * Also did CRLF->LF fix of my previous patch.
422 * Revision 1.10 2001/05/26 15:26:15 jongfoster
423 * ACL feature now provides more security by immediately dropping
424 * connections from untrusted hosts.
426 * Revision 1.9 2001/05/26 00:28:36 jongfoster
427 * Automatic reloading of config file.
428 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
429 * Most of the global variables have been moved to a new
430 * struct configuration_spec, accessed through csp->config->globalname
431 * Most of the globals remaining are used by the Win32 GUI.
433 * Revision 1.8 2001/05/25 22:43:18 jongfoster
434 * Fixing minor memory leak and buffer overflow.
436 * Revision 1.7 2001/05/25 22:34:30 jongfoster
439 * Revision 1.6 2001/05/23 00:13:58 joergs
440 * AmigaOS support fixed.
442 * Revision 1.5 2001/05/22 18:46:04 oes
444 * - Enabled filtering banners by size rather than URL
445 * by adding patterns that replace all standard banner
446 * sizes with the "Junkbuster" gif to the re_filterfile
448 * - Enabled filtering WebBugs by providing a pattern
449 * which kills all 1x1 images
451 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
452 * which is selected by the (nonstandard and therefore
453 * capital) letter 'U' in the option string.
454 * It causes the quantifiers to be ungreedy by default.
455 * Appending a ? turns back to greedy (!).
457 * - Added a new interceptor ijb-send-banner, which
458 * sends back the "Junkbuster" gif. Without imagelist or
459 * MSIE detection support, or if tinygif = 1, or the
460 * URL isn't recognized as an imageurl, a lame HTML
461 * explanation is sent instead.
463 * - Added new feature, which permits blocking remote
464 * script redirects and firing back a local redirect
466 * The feature is conditionally compiled, i.e. it
467 * can be disabled with --disable-fast-redirects,
468 * plus it must be activated by a "fast-redirects"
469 * line in the config file, has its own log level
470 * and of course wants to be displayed by show-proxy-args
471 * Note: Boy, all the #ifdefs in 1001 locations and
472 * all the fumbling with configure.in and acconfig.h
473 * were *way* more work than the feature itself :-(
475 * - Because a generic redirect template was needed for
476 * this, tinygif = 3 now uses the same.
478 * - Moved GIFs, and other static HTTP response templates
483 * - Removed some >400 CRs again (Jon, you really worked
486 * Revision 1.4 2001/05/21 19:34:01 jongfoster
487 * Made failure to bind() a fatal error.
489 * Revision 1.3 2001/05/20 01:21:20 jongfoster
490 * Version 2.9.4 checkin.
491 * - Merged popupfile and cookiefile, and added control over PCRS
492 * filtering, in new "permissionsfile".
493 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
494 * file error you now get a message box (in the Win32 GUI) rather
495 * than the program exiting with no explanation.
496 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
498 * - Removed tabs from "config"
499 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
500 * - Bumped up version number.
502 * Revision 1.2 2001/05/17 22:34:44 oes
503 * - Added hint on GIF char array generation to jcc.c
504 * - Cleaned CRLF's from the sources and related files
505 * - Repaired logging for REF and FRC
507 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
508 * Initial import of version 2.9.3 source tree
511 *********************************************************************/
517 #include <sys/types.h>
524 #ifdef FEATURE_PTHREAD
526 #endif /* def FEATURE_PTHREAD */
529 # ifndef FEATURE_PTHREAD
530 # include <windows.h>
531 # include <process.h>
532 # endif /* ndef FEATURE_PTHREAD */
535 # ifndef _WIN_CONSOLE
537 # endif /* ndef _WIN_CONSOLE */
539 #else /* ifndef _WIN32 */
541 # if !defined (__OS2__)
543 # include <sys/wait.h>
544 # endif /* ndef __OS2__ */
545 # include <sys/time.h>
546 # include <sys/stat.h>
547 # include <sys/ioctl.h>
550 #include <sys/termios.h>
561 # include <socket.h> /* BeOS has select() for sockets only. */
562 # include <OS.h> /* declarations for threads and stuff. */
565 # if defined(__EMX__) || defined(__OS2__)
566 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
571 #define bzero(B,N) memset(B,0x00,n)
586 #include "killpopup.h"
587 #include "miscutil.h"
589 #include "jbsockets.h"
594 #include "urlmatch.h"
596 const char jcc_h_rcs[] = JCC_H_VERSION;
597 const char project_h_rcs[] = PROJECT_H_VERSION;
600 struct client_state clients[1];
601 struct file_list files[1];
603 #ifdef FEATURE_STATISTICS
604 int urls_read = 0; /* total nr of urls read inc rejected */
605 int urls_rejected = 0; /* total nr of urls rejected */
606 #endif /* def FEATURE_STATISTICS */
608 #ifdef FEATURE_GRACEFUL_TERMINATION
612 static void listen_loop(void);
613 static void chat(struct client_state *csp);
615 void serve(struct client_state *csp);
616 #else /* ifndef AMIGA */
617 static void serve(struct client_state *csp);
618 #endif /* def AMIGA */
621 static int32 server_thread(void *data);
622 #endif /* def __BEOS__ */
625 #define sleep(N) Sleep(((N) * 1000))
629 #define sleep(N) DosSleep(((N) * 100))
632 #if defined(unix) || defined(__EMX__)
634 const char *pidfile = NULL;
635 int received_hup_signal = 0;
636 #endif /* defined unix */
638 /* The vanilla wafer. */
639 static const char VANILLA_WAFER[] =
640 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
641 "Do_not_send_me_any_copyrighted_information_other_than_the_"
642 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
643 "In_particular_do_not_send_me_any_cookies_that_"
644 "are_subject_to_a_claim_of_copyright_by_anybody._"
645 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
646 "(copyright_or_otherwise)_applying_to_any_cookie._";
649 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
650 /*********************************************************************
652 * Function : sig_handler
654 * Description : Signal handler for different signals.
655 * Exit gracefully on ABRT, TERM and INT
656 * or set a flag that will cause the errlog
657 * to be reopened by the main thread on HUP.
660 * 1 : the_signal = the signal cause this function to call
664 *********************************************************************/
665 static void sig_handler(int the_signal)
672 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
680 received_hup_signal = 1;
685 * We shouldn't be here, unless we catch signals
686 * in main() that we can't handle here!
688 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
696 /*********************************************************************
700 * Description : Once a connection to the client has been accepted,
701 * this function is called (via serve()) to handle the
702 * main business of the communication. When this
703 * function returns, the caller must close the client
707 * 1 : csp = Current client state (buffers, headers, etc...)
709 * Returns : On success, the number of bytes written are returned (zero
710 * indicates nothing was written). On error, -1 is returned,
711 * and errno is set appropriately. If count is zero and the
712 * file descriptor refers to a regular file, 0 will be
713 * returned without causing any other effect. For a special
714 * file, the results are not portable.
716 *********************************************************************/
717 static void chat(struct client_state *csp)
720 * This next lines are a little ugly, but they simplifies the if statements
721 * below. Basically if TOGGLE, then we want the if to test if the
722 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
723 * then we want the if to test for CSP_FLAG_FORCED , else we don't
725 #ifdef FEATURE_TOGGLE
726 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
727 #else /* ifndef FEATURE_TOGGLE */
728 # define IS_TOGGLED_ON_AND
729 #endif /* ndef FEATURE_TOGGLE */
730 #ifdef FEATURE_FORCE_LOAD
731 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
732 #else /* ifndef FEATURE_FORCE_LOAD */
733 # define IS_NOT_FORCED_AND
734 #endif /* def FEATURE_FORCE_LOAD */
736 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
738 char buf[BUFFER_SIZE];
746 int ms_iis5_hack = 0;
748 const struct forward_spec * fwd;
749 struct http_request *http;
750 int len; /* for buffer sizes */
751 #ifdef FEATURE_KILL_POPUPS
752 int block_popups; /* bool, 1==will block popups */
753 int block_popups_now = 0; /* bool, 1==currently blocking popups */
754 #endif /* def FEATURE_KILL_POPUPS */
756 int pcrs_filter; /* bool, 1==will filter through pcrs */
757 int gif_deanimate; /* bool, 1==will deanimate gifs */
759 /* Function that does the content filtering for the current request */
760 char *(*content_filter)() = NULL;
762 /* Skeleton for HTTP response, if we should intercept the request */
763 struct http_response *rsp;
768 * Read the client's request. Note that since we're not using select() we
769 * could get blocked here if a client connected, then didn't say anything!
774 len = read_socket(csp->cfd, buf, sizeof(buf));
776 if (len <= 0) break; /* error! */
778 add_to_iob(csp, buf, len);
780 req = get_header(csp);
784 break; /* no HTTP request! */
789 continue; /* more to come! */
792 #ifdef FEATURE_FORCE_LOAD
793 /* If this request contains the FORCE_PREFIX,
794 * better get rid of it now and set the force flag --oes
797 if (strstr(req, FORCE_PREFIX))
799 strclean(req, FORCE_PREFIX);
800 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
801 csp->flags |= CSP_FLAG_FORCED;
804 #endif /* def FEATURE_FORCE_LOAD */
806 parse_http_request(req, http, csp);
811 if (http->cmd == NULL)
813 strcpy(buf, CHEADER);
814 write_socket(csp->cfd, buf, strlen(buf));
816 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
821 /* decide how to route the HTTP request */
823 if ((fwd = forward_url(http, csp)) == NULL)
825 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
826 /* Never get here - LOG_LEVEL_FATAL causes program exit */
829 /* build the http request to send to the server
830 * we have to do one of the following:
832 * create = use the original HTTP request to create a new
833 * HTTP request that has either the path component
834 * without the http://domainspec (w/path) or the
835 * full orininal URL (w/url)
836 * Note that the path and/or the HTTP version may
837 * have been altered by now.
839 * connect = Open a socket to the host:port of the server
840 * and short-circuit server and client socket.
842 * pass = Pass the request unchanged if forwarding a CONNECT
843 * request to a parent proxy. Note that we'll be sending
844 * the CFAIL message ourselves if connecting to the parent
845 * fails, but we won't send a CSUCCEED message if it works,
846 * since that would result in a double message (ours and the
847 * parent's). After sending the request to the parent, we simply
853 * +--------+--------+
855 * 0 | create | connect|
857 * Forwarding +--------+--------+
859 * 1 | create | pass |
861 * +--------+--------+
866 * Determine the actions for this URL
868 #ifdef FEATURE_TOGGLE
869 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
871 /* Most compatible set of actions (i.e. none) */
872 init_current_action(csp->action);
875 #endif /* ndef FEATURE_TOGGLE */
877 url_actions(http, csp);
882 * Check if a CONNECT request is allowable:
883 * In the absence of a +limit-connect action, allow only port 443.
884 * If there is an action, allow whatever matches the specificaton.
888 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
889 || (csp->action->flags & ACTION_LIMIT_CONNECT
890 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
892 strcpy(buf, CFORBIDDEN);
893 write_socket(csp->cfd, buf, strlen(buf));
895 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
896 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
904 * Downgrade http version from 1.1 to 1.0 if +downgrade
907 if ( (http->ssl == 0)
908 && (!strcmpic(http->ver, "HTTP/1.1"))
909 && (csp->action->flags & ACTION_DOWNGRADE))
912 http->ver = strdup("HTTP/1.0");
914 if (http->ver == NULL)
916 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
921 * Save a copy of the original request for logging
923 http->ocmd = strdup(http->cmd);
925 if (http->ocmd == NULL)
927 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
931 * (Re)build the HTTP request for non-SSL requests.
932 * If forwarding, use the whole URL, else, use only the path.
938 http->cmd = strdup(http->gpc);
939 string_append(&http->cmd, " ");
941 if (fwd->forward_host)
943 string_append(&http->cmd, http->url);
947 string_append(&http->cmd, http->path);
950 string_append(&http->cmd, " ");
951 string_append(&http->cmd, http->ver);
953 if (http->cmd == NULL)
955 log_error(LOG_LEVEL_FATAL, "Out of memory rewiting SSL command");
958 enlist(csp->headers, http->cmd);
961 #ifdef FEATURE_COOKIE_JAR
963 * If we're logging cookies in a cookie jar, and the user has not
964 * supplied any wafers, and the user has not told us to suppress the
965 * vanilla wafer, then send the vanilla wafer.
967 if ((csp->config->jarfile != NULL)
968 && list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
969 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
971 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
973 #endif /* def FEATURE_COOKIE_JAR */
976 #ifdef FEATURE_KILL_POPUPS
977 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
978 #endif /* def FEATURE_KILL_POPUPS */
980 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
981 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
983 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
985 /* grab the rest of the client's headers */
989 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
991 len = read_socket(csp->cfd, buf, sizeof(buf));
994 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
997 add_to_iob(csp, buf, len);
1001 if (p == NULL) break;
1003 enlist(csp->headers, p);
1007 * We have a request. Now, check to see if we need to
1008 * intercept it, i.e. If ..
1012 /* a CGI call was detected and answered */
1013 (NULL != (rsp = dispatch_cgi(csp)))
1015 /* or we are enabled and... */
1016 || (IS_ENABLED_AND (
1018 /* ..the request was blocked */
1019 ( NULL != (rsp = block_url(csp)))
1021 /* ..or untrusted */
1022 #ifdef FEATURE_TRUST
1023 || ( NULL != (rsp = trust_url(csp)))
1024 #endif /* def FEATURE_TRUST */
1026 /* ..or a fast redirect kicked in */
1027 #ifdef FEATURE_FAST_REDIRECTS
1028 || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) &&
1029 (NULL != (rsp = redirect_url(csp))))
1030 #endif /* def FEATURE_FAST_REDIRECTS */
1034 /* Write the answer to the client */
1035 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1036 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1038 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1041 #ifdef FEATURE_STATISTICS
1042 /* Count as a rejected request */
1043 csp->flags |= CSP_FLAG_REJECTED;
1044 #endif /* def FEATURE_STATISTICS */
1046 /* Log (FIXME: All intercept reasons apprear as "crunch" with Status 200) */
1047 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1048 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1050 /* Clean up and return */
1051 free_http_response(rsp);
1055 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1057 if (fwd->forward_host)
1059 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1060 fwd->forward_host, fwd->forward_port, http->hostport);
1064 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1067 /* here we connect to the server, gateway, or the forwarder */
1069 csp->sfd = forwarded_connect(fwd, http, csp);
1071 if (csp->sfd == JB_INVALID_SOCKET)
1073 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1076 if (errno == EINVAL)
1078 rsp = error_response(csp, "no-such-domain", errno);
1080 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1081 csp->ip_addr_str, http->ocmd);
1085 rsp = error_response(csp, "connect-failed", errno);
1087 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1088 csp->ip_addr_str, http->ocmd);
1092 /* Write the answer to the client */
1095 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1096 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1098 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1102 free_http_response(rsp);
1106 log_error(LOG_LEVEL_CONNECT, "OK");
1108 hdr = sed(client_patterns, add_client_headers, csp);
1111 /* FIXME Should handle error properly */
1112 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1115 list_remove_all(csp->headers);
1117 if (fwd->forward_host || (http->ssl == 0))
1119 /* write the client's (modified) header to the server
1120 * (along with anything else that may be in the buffer)
1123 if (write_socket(csp->sfd, hdr, strlen(hdr))
1124 || (flush_socket(csp->sfd, csp) < 0))
1126 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1129 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1130 csp->ip_addr_str, http->ocmd);
1132 rsp = error_response(csp, "connect-failed", errno);
1136 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1137 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1139 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1143 free_http_response(rsp);
1151 * We're running an SSL tunnel and we're not forwarding,
1152 * so just send the "connect succeeded" message to the
1153 * client, flush the rest, and get out of the way.
1155 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1156 csp->ip_addr_str, http->ocmd);
1158 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1166 /* we're finished with the client's header */
1169 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1171 /* pass data between the client and server
1172 * until one or the other shuts down the connection.
1181 * FD_ZERO here seems to point to an errant macro which crashes.
1182 * So do this by hand for now...
1184 memset(&rfds,0x00,sizeof(fd_set));
1188 FD_SET(csp->cfd, &rfds);
1189 FD_SET(csp->sfd, &rfds);
1191 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1195 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1199 /* this is the body of the browser's request
1200 * just read it and write it.
1203 if (FD_ISSET(csp->cfd, &rfds))
1205 len = read_socket(csp->cfd, buf, sizeof(buf));
1209 break; /* "game over, man" */
1212 if (write_socket(csp->sfd, buf, (size_t)len))
1214 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1221 * The server wants to talk. It could be the header or the body.
1222 * If `hdr' is null, then it's the header otherwise it's the body.
1223 * FIXME: Does `hdr' really mean `host'? No.
1227 if (FD_ISSET(csp->sfd, &rfds))
1230 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1234 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1236 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1237 csp->ip_addr_str, http->ocmd);
1239 rsp = error_response(csp, "connect-failed", errno);
1243 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1244 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1246 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1250 free_http_response(rsp);
1254 /* Add a trailing zero. This lets filter_popups
1255 * use string operations.
1259 #ifdef FEATURE_KILL_POPUPS
1260 /* Filter the popups on this read. */
1261 if (block_popups_now)
1263 filter_popups(buf, csp);
1265 #endif /* def FEATURE_KILL_POPUPS */
1267 /* Normally, this would indicate that we've read
1268 * as much as the server has sent us and we can
1269 * close the client connection. However, Microsoft
1270 * in its wisdom has released IIS/5 with a bug that
1271 * prevents it from sending the trailing \r\n in
1272 * a 302 redirect header (and possibly other headers).
1273 * To work around this if we've haven't parsed
1274 * a full header we'll append a trailing \r\n
1275 * and see if this now generates a valid one.
1277 * This hack shouldn't have any impacts. If we've
1278 * already transmitted the header or if this is a
1279 * SSL connection, then we won't bother with this
1280 * hack. So we only work on partially received
1281 * headers. If we append a \r\n and this still
1282 * doesn't generate a valid header, then we won't
1283 * transmit anything to the client.
1288 if (server_body || http->ssl)
1291 * If we have been buffering up the document,
1292 * now is the time to apply content modification
1293 * and send the result to the client.
1298 * If the content filter fails, use the original
1299 * buffer and length.
1300 * (see p != NULL ? p : csp->iob->cur below)
1302 if (NULL == (p = (*content_filter)(csp)))
1304 csp->content_length = csp->iob->eod - csp->iob->cur;
1307 hdr = sed(server_patterns, add_server_headers, csp);
1310 /* FIXME Should handle error properly */
1311 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1314 if (write_socket(csp->cfd, hdr, strlen(hdr))
1315 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1317 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1327 break; /* "game over, man" */
1331 * This is NOT the body, so
1332 * Let's pretend the server just sent us a blank line.
1334 len = sprintf(buf, "\r\n");
1337 * Now, let the normal header parsing algorithm below do its
1338 * job. If it fails, we'll exit instead of continuing.
1345 * If this is an SSL connection or we're in the body
1346 * of the server document, just write it to the client,
1347 * unless we need to buffer the body for later content-filtering
1350 if (server_body || http->ssl)
1354 add_to_iob(csp, buf, len);
1357 * If the buffer limit will be reached on the next read,
1358 * switch to non-filtering mode, i.e. make & write the
1359 * header, flush the socket and get out of the way.
1361 if (((size_t)(csp->iob->eod - csp->iob->buf)) + (size_t)BUFFER_SIZE > csp->config->buffer_limit)
1365 log_error(LOG_LEVEL_ERROR, "Buffer size limit reached! Flushing and stepping back.");
1367 hdr = sed(server_patterns, add_server_headers, csp);
1370 /* FIXME Should handle error properly */
1371 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1374 hdrlen = strlen(hdr);
1375 byte_count += hdrlen;
1377 if (write_socket(csp->cfd, hdr, hdrlen)
1378 || ((len = flush_socket(csp->cfd, csp)) < 0))
1380 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1389 content_filter = NULL;
1396 if (write_socket(csp->cfd, buf, (size_t)len))
1398 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1407 /* we're still looking for the end of the
1408 * server's header ... (does that make header
1409 * parsing an "out of body experience" ?
1412 /* buffer up the data we just read */
1413 add_to_iob(csp, buf, len);
1415 /* get header lines from the iob */
1417 while ((p = get_header(csp)) != NULL)
1421 /* see following note */
1424 enlist(csp->headers, p);
1428 /* NOTE: there are no "empty" headers so
1429 * if the pointer `p' is not NULL we must
1430 * assume that we reached the end of the
1431 * buffer before we hit the end of the header.
1438 /* Well, we tried our MS IIS/5
1439 * hack and it didn't work.
1440 * The header is incomplete
1441 * and there isn't anything
1442 * we can do about it.
1448 /* Since we have to wait for
1449 * more from the server before
1450 * we can parse the headers
1451 * we just continue here.
1457 /* we have now received the entire header.
1458 * filter it and send the result to the client
1461 hdr = sed(server_patterns, add_server_headers, csp);
1464 /* FIXME Should handle error properly */
1465 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1468 #ifdef FEATURE_KILL_POPUPS
1469 /* Start blocking popups if appropriate. */
1471 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1472 !http->ssl && /* We talk plaintext */
1473 block_popups) /* Policy allows */
1475 block_popups_now = 1;
1477 * Filter the part of the body that came in the same read
1478 * as the last headers:
1480 filter_popups(csp->iob->cur, csp);
1483 #endif /* def FEATURE_KILL_POPUPS */
1485 /* Buffer and pcrs filter this if appropriate. */
1487 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1488 !http->ssl && /* We talk plaintext */
1489 pcrs_filter) /* Policy allows */
1491 content_filter = pcrs_filter_response;
1494 /* Buffer and gif_deanimate this if appropriate. */
1496 if ((csp->content_type & CT_GIF) && /* It's a image/gif MIME-Type */
1497 !http->ssl && /* We talk plaintext */
1498 gif_deanimate) /* Policy allows */
1500 content_filter = gif_deanimate_response;
1504 * Only write if we're not buffering for content modification
1506 if (!content_filter)
1508 /* write the server's (modified) header to
1509 * the client (along with anything else that
1510 * may be in the buffer)
1513 if (write_socket(csp->cfd, hdr, strlen(hdr))
1514 || ((len = flush_socket(csp->cfd, csp)) < 0))
1516 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1518 /* the write failed, so don't bother
1519 * mentioning it to the client...
1520 * it probably can't hear us anyway.
1529 /* we're finished with the server's header */
1534 /* If this was a MS IIS/5 hack then it means
1535 * the server has already closed the
1536 * connection. Nothing more to read. Time
1547 return; /* huh? we should never get here */
1550 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1551 csp->ip_addr_str, http->ocmd, byte_count);
1555 /*********************************************************************
1559 * Description : This is little more than chat. We only "serve" to
1560 * to close any socket that chat may have opened.
1563 * 1 : csp = Current client state (buffers, headers, etc...)
1567 *********************************************************************/
1569 void serve(struct client_state *csp)
1570 #else /* ifndef AMIGA */
1571 static void serve(struct client_state *csp)
1572 #endif /* def AMIGA */
1575 close_socket(csp->cfd);
1577 if (csp->sfd != JB_INVALID_SOCKET)
1579 close_socket(csp->sfd);
1582 csp->flags &= ~CSP_FLAG_ACTIVE;
1588 /*********************************************************************
1590 * Function : server_thread
1592 * Description : We only exist to call `serve' in a threaded environment.
1595 * 1 : data = Current client state (buffers, headers, etc...)
1597 * Returns : Always 0.
1599 *********************************************************************/
1600 static int32 server_thread(void *data)
1602 serve((struct client_state *) data);
1609 /*********************************************************************
1613 * Description : Print usage info & exit.
1615 * Parameters : Pointer to argv[0] for identifying ourselves
1619 *********************************************************************/
1620 void usage(const char *myname)
1622 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
1623 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
1624 "Aborting.\n", myname);
1631 /*********************************************************************
1635 * Description : Load the config file and start the listen loop.
1636 * This function is a lot more *sane* with the `load_config'
1637 * and `listen_loop' functions; although it stills does
1638 * a *little* too much for my taste.
1641 * 1 : argc = Number of parameters (including $0).
1642 * 2 : argv = Array of (char *)'s to the parameters.
1644 * Returns : 1 if : can't open config file, unrecognized directive,
1645 * stats requested in multi-thread mode, can't open the
1646 * log file, can't open the jar file, listen port is invalid,
1647 * any load fails, and can't bind port.
1649 * Else main never returns, the process must be signaled
1650 * to terminate execution. Or, on Windows, use the
1651 * "File", "Exit" menu option.
1653 *********************************************************************/
1655 int real_main(int argc, const char *argv[])
1657 int main(int argc, const char *argv[])
1662 struct passwd *pw = NULL;
1663 struct group *grp = NULL;
1671 #if !defined(_WIN32)
1679 * Parse the command line arguments
1681 while (++argc_pos < argc)
1683 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1685 if (strcmp(argv[argc_pos], "--help") == 0)
1690 else if(strcmp(argv[argc_pos], "--version") == 0)
1692 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
1696 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
1701 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
1703 if (++argc_pos == argc) usage(argv[0]);
1704 pidfile = strdup(argv[argc_pos]);
1707 else if (strcmp(argv[argc_pos], "--user" ) == 0)
1709 if (++argc_pos == argc) usage(argv[argc_pos]);
1711 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
1714 if (NULL == (grp = getgrnam(p)))
1716 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
1720 if (NULL == (pw = getpwnam(argv[argc_pos])))
1722 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
1725 if (p != NULL) *--p = '\0';
1727 #endif /* defined(unix) */
1729 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
1731 configfile = argv[argc_pos];
1734 } /* -END- while (more arguments) */
1737 if ( *configfile != '/' )
1741 /* make config-filename absolute here */
1742 if ( !(basedir = getcwd( NULL, 1024 )))
1744 perror("get working dir failed");
1748 if ( !(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 )))
1750 perror("malloc failed");
1753 strcpy( abs_file, basedir );
1754 strcat( abs_file, "/" );
1755 strcat( abs_file, configfile );
1756 configfile = abs_file;
1758 #endif /* defined unix */
1765 #elif defined(_WIN32)
1770 * Unix signal handling
1772 * Catch the abort, interrupt and terminate signals for a graceful exit
1773 * Catch the hangup signal so the errlog can be reopened.
1774 * Ignore the broken pipe and child signals
1775 * FIXME: Isn't ignoring the default for SIGCHLD anyway and why ignore SIGPIPE?
1777 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1780 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
1781 const int ignored_signals[] = { SIGPIPE, SIGCHLD, 0 };
1783 for (idx = 0; catched_signals[idx] != 0; idx++)
1785 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
1787 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
1791 for (idx = 0; ignored_signals[idx] != 0; idx++)
1793 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
1795 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
1800 #else /* ifdef _WIN32 */
1801 # ifdef _WIN_CONSOLE
1803 * We *are* in a windows console app.
1804 * Print a verbose messages about FAQ's and such
1806 printf(win32_blurb);
1807 # endif /* def _WIN_CONSOLE */
1808 #endif /* def _WIN32 */
1811 /* Initialize the CGI subsystem */
1812 cgi_init_error_messages();
1815 * If runnig on unix and without the --nodaemon
1816 * option, become a daemon. I.e. fork, detach
1817 * from tty and get process group leadership
1830 if ( pid < 0 ) /* error */
1835 else if ( pid != 0 ) /* parent */
1840 * must check for errors
1841 * child died due to missing files aso
1844 wpid = waitpid( pid, &status, WNOHANG );
1853 /* Should be more portable, but not as well tested */
1858 #else /* ndef __FreeBSD__ */
1860 #endif /* ndef __FreeBSD__ */
1861 fd = open("/dev/tty", O_RDONLY);
1864 /* no error check here */
1865 ioctl( fd, TIOCNOTTY,0 );
1869 /* FIXME: should close stderr (fd 2) here too, but the test
1871 * and load config file is done in listen_loop() and puts
1872 * some messages on stderr there.
1879 } /* -END- if (!no_daemon) */
1882 * As soon as we have written the PID file, we can switch
1883 * to the user and group ID indicated by the --user option
1889 if (((NULL != grp) && setgid(grp->gr_gid)) || (setgid(pw->pw_gid)))
1891 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
1893 if (setuid(pw->pw_uid))
1895 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
1899 #endif /* defined unix */
1909 /*********************************************************************
1911 * Function : bind_port_helper
1913 * Description : Bind the listen port. Handles logging, and aborts
1917 * 1 : config = Privoxy configuration. Specifies port
1920 * Returns : Port that was opened.
1922 *********************************************************************/
1923 static jb_socket bind_port_helper(struct configuration_spec * config)
1928 if ( (config->haddr != NULL)
1929 && (config->haddr[0] == '1')
1930 && (config->haddr[1] == '2')
1931 && (config->haddr[2] == '7')
1932 && (config->haddr[3] == '.') )
1934 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
1937 else if (config->haddr == NULL)
1939 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
1944 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
1945 config->hport, config->haddr);
1948 result = bind_port(config->haddr, config->hport, &bfd);
1955 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
1956 "There may be another Privoxy or some other "
1957 "proxy running on port %d",
1958 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
1959 config->hport, config->hport);
1962 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
1963 "The hostname is not resolvable",
1964 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
1967 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
1968 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
1971 /* shouldn't get here */
1972 return JB_INVALID_SOCKET;
1975 config->need_bind = 0;
1981 /*********************************************************************
1983 * Function : listen_loop
1985 * Description : bind the listen port and enter a "FOREVER" listening loop.
1991 *********************************************************************/
1992 static void listen_loop(void)
1994 struct client_state *csp = NULL;
1996 struct configuration_spec * config;
1998 config = load_config();
2000 bfd = bind_port_helper(config);
2002 #ifdef FEATURE_GRACEFUL_TERMINATION
2003 while (!g_terminate)
2008 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2009 while (waitpid(-1, NULL, WNOHANG) > 0)
2011 /* zombie children */
2013 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2016 * Free data that was used by died threads
2022 * Re-open the errlog after HUP signal
2024 if (received_hup_signal)
2026 init_error_log(Argv[0], config->logfile, config->debug);
2027 received_hup_signal = 0;
2032 #ifdef FEATURE_COOKIE_JAR
2034 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2035 * already open. I think unload_configfile() is not being run, which should do
2036 * this work. Until that can get resolved, we'll use this workaround.
2040 if (csp->config->jar)
2042 fclose(csp->config->jar);
2043 csp->config->jar = NULL;
2045 #endif /* FEATURE_COOKIE_JAR */
2046 #endif /* __OS2__ */
2048 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2050 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2054 csp->flags |= CSP_FLAG_ACTIVE;
2055 csp->sfd = JB_INVALID_SOCKET;
2057 csp->config = config = load_config();
2059 if ( config->need_bind )
2062 * Since we were listening to the "old port", we will not see
2063 * a "listen" param change until the next IJB request. So, at
2064 * least 1 more request must be made for us to find the new
2065 * setting. I am simply closing the old socket and binding the
2068 * Which-ever is correct, we will serve 1 more page via the
2069 * old settings. This should probably be a "show-proxy-args"
2070 * request. This should not be a so common of an operation
2071 * that this will hurt people's feelings.
2076 bfd = bind_port_helper(config);
2079 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2081 if (!accept_connection(csp, bfd))
2083 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2096 log_error(LOG_LEVEL_CONNECT, "OK");
2099 #ifdef FEATURE_TOGGLE
2102 csp->flags |= CSP_FLAG_TOGGLED_ON;
2104 #endif /* def FEATURE_TOGGLE */
2106 if (run_loader(csp))
2108 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2109 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2113 if (block_acl(NULL,csp))
2115 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2116 close_socket(csp->cfd);
2120 #endif /* def FEATURE_ACL */
2122 /* add it to the list of clients */
2123 csp->next = clients->next;
2124 clients->next = csp;
2126 if (config->multi_threaded)
2130 /* this is a switch () statment in the C preprocessor - ugh */
2131 #undef SELECTED_ONE_OPTION
2133 /* Use Pthreads in preference to native code */
2134 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2135 #define SELECTED_ONE_OPTION
2137 pthread_t the_thread;
2138 pthread_attr_t attrs;
2140 pthread_attr_init(&attrs);
2141 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2142 child_id = (pthread_create(&the_thread, &attrs,
2143 (void*)serve, csp) ? -1 : 0);
2144 pthread_attr_destroy(&attrs);
2148 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2149 #define SELECTED_ONE_OPTION
2150 child_id = _beginthread(
2151 (void (*)(void *))serve,
2156 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2157 #define SELECTED_ONE_OPTION
2158 child_id = _beginthread(
2159 (void(* _Optlink)(void*))serve,
2165 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2166 #define SELECTED_ONE_OPTION
2168 thread_id tid = spawn_thread
2169 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2171 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2173 child_id = (int) tid;
2182 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2183 #define SELECTED_ONE_OPTION
2184 csp->cfd = ReleaseSocket(csp->cfd, -1);
2185 if((child_id = (int)CreateNewProcTags(
2186 NP_Entry, (ULONG)server_thread,
2187 NP_Output, Output(),
2188 NP_CloseOutput, FALSE,
2189 NP_Name, (ULONG)"privoxy child",
2190 NP_StackSize, 200*1024,
2194 ((struct Task *)child_id)->tc_UserData = csp;
2195 Signal((struct Task *)child_id, SIGF_SINGLE);
2200 #if !defined(SELECTED_ONE_OPTION)
2203 /* This block is only needed when using fork().
2204 * When using threads, the server thread was
2205 * created and run by the call to _beginthread().
2207 if (child_id == 0) /* child */
2213 else if (child_id > 0) /* parent */
2215 /* in a fork()'d environment, the parent's
2216 * copy of the client socket and the CSP
2220 #if !defined(_WIN32) && defined(__CYGWIN__)
2222 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2223 close_socket(csp->cfd);
2224 csp->flags &= ~CSP_FLAG_ACTIVE;
2228 #undef SELECTED_ONE_OPTION
2229 /* end of cpp switch () */
2231 if (child_id < 0) /* failed */
2233 char buf[BUFFER_SIZE];
2235 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2237 sprintf(buf , "JunkBuster: can't fork: errno = %d", errno);
2239 write_socket(csp->cfd, buf, strlen(buf));
2240 close_socket(csp->cfd);
2241 csp->flags &= ~CSP_FLAG_ACTIVE;
2252 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2254 /* Clean up. Aim: free all memory (no leaks) */
2255 #ifdef FEATURE_GRACEFUL_TERMINATION
2257 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2259 unload_current_config_file();
2260 unload_current_actions_file();
2261 unload_current_re_filterfile();
2262 #ifdef FEATURE_TRUST
2263 unload_current_trust_file();
2266 if (config->multi_threaded)
2273 } while ((clients->next != NULL) && (--i > 0));
2277 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2286 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2287 /* Cleanup - remove taskbar icon etc. */
2292 #endif /* FEATURE_GRACEFUL_TERMINATION */