1 const char jcc_rcs[] = "$Id: jcc.c,v 1.88 2002/03/27 14:32:43 david__schmidt 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 1.88 2002/03/27 14:32:43 david__schmidt
37 * More compiler warning message maintenance
39 * Revision 1.87 2002/03/26 22:29:54 swa
40 * we have a new homepage!
42 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
43 * Workaround for closing the jarfile before load_config() comes around again
45 * Revision 1.85 2002/03/24 15:23:33 jongfoster
48 * Revision 1.84 2002/03/24 13:25:43 swa
49 * name change related issues
51 * Revision 1.83 2002/03/16 23:54:06 jongfoster
52 * Adding graceful termination feature, to help look for memory leaks.
53 * If you enable this (which, by design, has to be done by hand
54 * editing config.h) and then go to http://i.j.b/die, then the program
55 * will exit cleanly after the *next* request. It should free all the
56 * memory that was used.
58 * Revision 1.82 2002/03/13 00:27:05 jongfoster
61 * Revision 1.81 2002/03/12 01:42:50 oes
62 * Introduced modular filters
64 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
65 * OS/2 port maintenance:
66 * - Fixed EMX build - it had decayed a little
67 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
68 * substituted a memset for now.
70 * Revision 1.79 2002/03/09 20:03:52 jongfoster
71 * - Making various functions return int rather than size_t.
72 * (Undoing a recent change). Since size_t is unsigned on
73 * Windows, functions like read_socket that return -1 on
74 * error cannot return a size_t.
76 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
77 * crashes, and also frequently caused JB to jump to 100%
78 * CPU and stay there. (Because it thought it had just
79 * read ((unsigned)-1) == 4Gb of data...)
81 * - The signature of write_socket has changed, it now simply
82 * returns success=0/failure=nonzero.
84 * - Trying to get rid of a few warnings --with-debug on
85 * Windows, I've introduced a new type "jb_socket". This is
86 * used for the socket file descriptors. On Windows, this
87 * is SOCKET (a typedef for unsigned). Everywhere else, it's
88 * an int. The error value can't be -1 any more, so it's
89 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
90 * Windows it maps to the #define INVALID_SOCKET.)
92 * - The signature of bind_port has changed.
94 * Revision 1.78 2002/03/08 21:35:04 oes
95 * Added optional group supplement to --user option. Will now use default group of user if no group given
97 * Revision 1.77 2002/03/07 03:52:06 oes
98 * - Fixed compiler warnings etc
99 * - Improved handling of failed DNS lookups
101 * Revision 1.76 2002/03/06 22:54:35 jongfoster
102 * Automated function-comment nitpicking.
104 * Revision 1.75 2002/03/06 10:02:19 oes
105 * Fixed stupid bug when --user was not given
107 * Revision 1.74 2002/03/06 00:49:31 jongfoster
108 * Fixing warning on Windows
109 * Making #ifdefs that refer to the same variable consistently
110 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
112 * Revision 1.73 2002/03/05 23:57:30 hal9
113 * Stray character 's' on line 1618 was breaking build.
115 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
116 * - Re-enable OS/2 building after new parms were added
117 * - Fix false out of memory report when resolving CGI templates when no IP
118 * address is available of failed attempt (a la no such domain)
120 * Revision 1.71 2002/03/05 18:13:56 oes
121 * Added --user option
123 * Revision 1.70 2002/03/05 04:52:42 oes
124 * Deleted non-errlog debugging code
126 * Revision 1.69 2002/03/04 23:50:00 jongfoster
127 * Splitting off bind_port() call into bind_port_helper(), with
130 * Revision 1.68 2002/03/04 20:17:32 oes
133 * Revision 1.67 2002/03/04 18:18:57 oes
134 * - Removed _DEBUG mode
135 * - Cleand up cmdline parsing
136 * - Introduced --no-daemon, --pidfile options
137 * - Cleaned up signal handling:
138 * - Terminate cleanly on INT, TERM and ABRT
139 * - Schedule logfile for re-opening on HUP
140 * - Ignore CHLD and PIPE
141 * - Leave the rest with their default handlers
142 * - Uniform handler registration
143 * - Added usage() function
144 * - Played styleguide police
146 * Revision 1.66 2002/03/03 15:06:55 oes
147 * Re-enabled automatic config reloading
149 * Revision 1.65 2002/03/03 14:49:11 oes
150 * Fixed CLF logging: Now uses client's original HTTP request
152 * Revision 1.64 2002/03/03 09:18:03 joergs
153 * Made jumbjuster work on AmigaOS again.
155 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
156 * Clean up a little CRLF unpleasantness that suddenly appeared
158 * Revision 1.62 2002/02/20 23:17:23 jongfoster
159 * Detecting some out-of memory conditions and exiting with a log message.
161 * Revision 1.61 2002/01/17 21:01:52 jongfoster
162 * Moving all our URL and URL pattern parsing code to urlmatch.c.
164 * Revision 1.60 2001/12/30 14:07:32 steudten
165 * - Add signal handling (unix)
166 * - Add SIGHUP handler (unix)
167 * - Add creation of pidfile (unix)
168 * - Add action 'top' in rc file (RH)
169 * - Add entry 'SIGNALS' to manpage
170 * - Add exit message to logfile (unix)
172 * Revision 1.59 2001/12/13 14:07:18 oes
173 * Fixed Bug: 503 error page now sent OK
175 * Revision 1.58 2001/11/30 23:37:24 jongfoster
176 * Renaming the Win32 config file to config.txt - this is almost the
177 * same as the corresponding UNIX name "config"
179 * Revision 1.57 2001/11/16 00:47:43 jongfoster
180 * Changing the tty-disconnection code to use setsid().
182 * Revision 1.56 2001/11/13 20:20:54 jongfoster
183 * Tabs->spaces, fixing a bug with missing {} around an if()
185 * Revision 1.55 2001/11/13 20:14:53 jongfoster
186 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
188 * Revision 1.54 2001/11/07 00:03:14 steudten
189 * Give reliable return value if an error
190 * occurs not just 0 with new daemon mode.
192 * Revision 1.53 2001/11/05 21:41:43 steudten
193 * Add changes to be a real daemon just for unix os.
194 * (change cwd to /, detach from controlling tty, set
195 * process group and session leader to the own process.
197 * Add some fatal-error log message for failed malloc().
198 * Add '-d' if compiled with 'configure --with-debug' to
199 * enable debug output.
201 * Revision 1.52 2001/10/26 20:11:20 jongfoster
202 * Fixing type mismatch
204 * Revision 1.51 2001/10/26 17:38:28 oes
207 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
208 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
209 * threads to call select() simultaneously. So, it's time to do a real, live,
210 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
211 * (native). Both versions will work, but using __OS2__ offers multi-threading.
213 * Revision 1.49 2001/10/23 21:41:35 jongfoster
214 * Added call to initialize the (statically-allocated of course)
215 * "out of memory" CGI response.
217 * Revision 1.48 2001/10/10 19:56:46 jongfoster
218 * Moving some code that wasn't cookie-related out of an #ifdef
221 * Revision 1.47 2001/10/10 16:44:36 oes
222 * Added CONNECT destination port limitation check
224 * Revision 1.46 2001/10/08 15:17:41 oes
225 * Re-enabled SSL forwarding
227 * Revision 1.45 2001/10/07 15:42:11 oes
228 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
230 * Moved downgrading of the HTTP version from parse_http_request to
231 * chat(), since we can't decide if it is necessary before we have
232 * determined the actions for the URL. The HTTP command is now
233 * *always* re-built so the repairs need no longer be special-cased.
235 * filter_popups now gets a csp pointer so it can raise the new
236 * CSP_FLAG_MODIFIED flag.
240 * Added configurable size limit for the IOB. If the IOB grows so
241 * large that the next read would exceed the limit, the header
242 * is generated, and the header & unfiltered buffer are flushed
243 * to the client. Chat then continues in non-buffering,
244 * non-filtering body mode.
246 * Revision 1.44 2001/10/02 18:13:57 oes
249 * Revision 1.43 2001/10/02 15:32:13 oes
250 * Moved generation of hdr
252 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
253 * Cleaning up 2 compiler warnings on OS/2.
255 * Revision 1.41 2001/09/16 17:05:14 jongfoster
256 * Removing unused #include showarg.h
258 * Revision 1.40 2001/09/16 15:41:45 jongfoster
259 * Fixing signed/unsigned comparison warning.
261 * Revision 1.39 2001/09/16 13:21:27 jongfoster
262 * Changes to use new list functions.
264 * Revision 1.38 2001/09/16 13:01:46 jongfoster
265 * Removing redundant function call that zeroed zalloc()'d memory.
267 * Revision 1.37 2001/09/10 11:12:24 oes
268 * Deleted unused variable
270 * Revision 1.36 2001/09/10 10:56:15 oes
271 * Silenced compiler warnings
273 * Revision 1.35 2001/07/31 14:44:22 oes
274 * Deleted unused size parameter from filter_popups()
276 * Revision 1.34 2001/07/30 22:08:36 jongfoster
277 * Tidying up #defines:
278 * - All feature #defines are now of the form FEATURE_xxx
279 * - Permanently turned off WIN_GUI_EDIT
280 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
282 * Revision 1.33 2001/07/29 19:32:00 jongfoster
283 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
285 * Revision 1.32 2001/07/29 18:47:05 jongfoster
286 * Adding missing #include "loadcfg.h"
288 * Revision 1.31 2001/07/29 12:17:48 oes
289 * Applied pthread fix by Paul Lieverse
291 * Revision 1.30 2001/07/25 22:57:13 jongfoster
292 * __BEOS__ no longer overrides FEATURE_PTHREAD.
293 * This is because FEATURE_PTHREAD will soon be widely used, so I
294 * want to keep it simple.
296 * Revision 1.29 2001/07/24 12:47:06 oes
297 * Applied BeOS support update by Eugenia
299 * Revision 1.28 2001/07/23 13:26:12 oes
300 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
302 * Revision 1.27 2001/07/19 19:09:47 haroon
303 * - Added code to take care of the situation where while processing the first
304 * server response (which includes the server header), after finding the end
305 * of the headers we were not looking past the end of the headers for
306 * content modification. I enabled it for filter_popups.
307 * Someone else should look to see if other similar operations should be
308 * done to the discarded portion of the buffer.
310 * Note 2001/07/20: No, the other content modification mechanisms will process
311 * the whole iob later anyway. --oes
313 * Revision 1.26 2001/07/18 12:31:36 oes
316 * Revision 1.25 2001/07/15 19:43:49 jongfoster
317 * Supports POSIX threads.
318 * Also removed some unused #includes.
320 * Revision 1.24 2001/07/13 14:00:40 oes
321 * - Generic content modification scheme:
322 * Each feature has its own applicability flag that is set
323 * from csp->action->flags.
324 * Replaced the "filtering" int flag , by a function pointer
325 * "content_filter" to the function that will do the content
326 * modification. If it is != NULL, the document will be buffered
327 * and processed through *content_filter, which must set
328 * csp->content_length and return a modified copy of the body
329 * or return NULL (on failiure).
330 * - Changed csp->is_text to the more generic bitmap csp->content_type
331 * which can currently take the valued CT_TEXT or CT_GIF
333 * - Removed all #ifdef PCRS
335 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
336 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
337 * the `block_acl' call. This prevents a compilation error when the user
338 * does not wish to use the "ACL" feature.
340 * Revision 1.22 2001/06/29 21:45:41 oes
341 * Indentation, CRLF->LF, Tab-> Space
343 * Revision 1.21 2001/06/29 13:29:36 oes
344 * - Cleaned up, improved comments
345 * - Unified all possible interceptors (CGI,
346 * block, trust, fast_redirect) in one
347 * place, with one (CGI) answer generation
348 * mechansim. Much clearer now.
349 * - Removed the GIF image generation, which
350 * is now done in filters.c:block_url()
351 * - Made error conditions like domain lookup
352 * failiure or (various) problems while talking
353 * to the server use cgi.c:error_response()
354 * instead of generating HTML/HTTP in chat() (yuck!)
355 * - Removed logentry from cancelled commit
357 * Revision 1.20 2001/06/09 10:55:28 jongfoster
358 * Changing BUFSIZ ==> BUFFER_SIZE
360 * Revision 1.19 2001/06/07 23:12:52 jongfoster
361 * Replacing function pointer in struct gateway with a directly
362 * called function forwarded_connect().
363 * Replacing struct gateway with struct forward_spec
365 * Revision 1.18 2001/06/03 19:12:16 oes
366 * introduced new cgi handling
368 * Revision 1.17 2001/06/01 20:07:23 jongfoster
369 * Now uses action +image-blocker{} rather than config->tinygif
371 * Revision 1.16 2001/06/01 18:49:17 jongfoster
372 * Replaced "list_share" with "list" - the tiny memory gain was not
373 * worth the extra complexity.
375 * Revision 1.15 2001/05/31 21:24:47 jongfoster
376 * Changed "permission" to "action" throughout.
377 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
378 * Moved vanilla wafer check into chat(), since we must now
379 * decide whether or not to add it based on the URL.
381 * Revision 1.14 2001/05/29 20:14:01 joergs
382 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
385 * Revision 1.13 2001/05/29 09:50:24 jongfoster
386 * Unified blocklist/imagelist/permissionslist.
387 * File format is still under discussion, but the internal changes
390 * Also modified interceptor behaviour:
391 * - We now intercept all URLs beginning with one of the following
392 * prefixes (and *only* these prefixes):
394 * * http://ijbswa.sf.net/config/
395 * * http://ijbswa.sourceforge.net/config/
396 * - New interceptors "home page" - go to http://i.j.b/ to see it.
397 * - Internal changes so that intercepted and fast redirect pages
398 * are not replaced with an image.
399 * - Interceptors now have the option to send a binary page direct
400 * to the client. (i.e. ijb-send-banner uses this)
401 * - Implemented show-url-info interceptor. (Which is why I needed
402 * the above interceptors changes - a typical URL is
403 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
404 * The previous mechanism would not have intercepted that, and
405 * if it had been intercepted then it then it would have replaced
408 * Revision 1.12 2001/05/27 22:17:04 oes
410 * - re_process_buffer no longer writes the modified buffer
411 * to the client, which was very ugly. It now returns the
412 * buffer, which it is then written by chat.
414 * - content_length now adjusts the Content-Length: header
415 * for modified documents rather than crunch()ing it.
416 * (Length info in csp->content_length, which is 0 for
417 * unmodified documents)
419 * - For this to work, sed() is called twice when filtering.
421 * Revision 1.11 2001/05/26 17:27:53 jongfoster
422 * Added support for CLF and fixed LOG_LEVEL_LOG.
423 * Also did CRLF->LF fix of my previous patch.
425 * Revision 1.10 2001/05/26 15:26:15 jongfoster
426 * ACL feature now provides more security by immediately dropping
427 * connections from untrusted hosts.
429 * Revision 1.9 2001/05/26 00:28:36 jongfoster
430 * Automatic reloading of config file.
431 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
432 * Most of the global variables have been moved to a new
433 * struct configuration_spec, accessed through csp->config->globalname
434 * Most of the globals remaining are used by the Win32 GUI.
436 * Revision 1.8 2001/05/25 22:43:18 jongfoster
437 * Fixing minor memory leak and buffer overflow.
439 * Revision 1.7 2001/05/25 22:34:30 jongfoster
442 * Revision 1.6 2001/05/23 00:13:58 joergs
443 * AmigaOS support fixed.
445 * Revision 1.5 2001/05/22 18:46:04 oes
447 * - Enabled filtering banners by size rather than URL
448 * by adding patterns that replace all standard banner
449 * sizes with the "Junkbuster" gif to the re_filterfile
451 * - Enabled filtering WebBugs by providing a pattern
452 * which kills all 1x1 images
454 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
455 * which is selected by the (nonstandard and therefore
456 * capital) letter 'U' in the option string.
457 * It causes the quantifiers to be ungreedy by default.
458 * Appending a ? turns back to greedy (!).
460 * - Added a new interceptor ijb-send-banner, which
461 * sends back the "Junkbuster" gif. Without imagelist or
462 * MSIE detection support, or if tinygif = 1, or the
463 * URL isn't recognized as an imageurl, a lame HTML
464 * explanation is sent instead.
466 * - Added new feature, which permits blocking remote
467 * script redirects and firing back a local redirect
469 * The feature is conditionally compiled, i.e. it
470 * can be disabled with --disable-fast-redirects,
471 * plus it must be activated by a "fast-redirects"
472 * line in the config file, has its own log level
473 * and of course wants to be displayed by show-proxy-args
474 * Note: Boy, all the #ifdefs in 1001 locations and
475 * all the fumbling with configure.in and acconfig.h
476 * were *way* more work than the feature itself :-(
478 * - Because a generic redirect template was needed for
479 * this, tinygif = 3 now uses the same.
481 * - Moved GIFs, and other static HTTP response templates
486 * - Removed some >400 CRs again (Jon, you really worked
489 * Revision 1.4 2001/05/21 19:34:01 jongfoster
490 * Made failure to bind() a fatal error.
492 * Revision 1.3 2001/05/20 01:21:20 jongfoster
493 * Version 2.9.4 checkin.
494 * - Merged popupfile and cookiefile, and added control over PCRS
495 * filtering, in new "permissionsfile".
496 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
497 * file error you now get a message box (in the Win32 GUI) rather
498 * than the program exiting with no explanation.
499 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
501 * - Removed tabs from "config"
502 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
503 * - Bumped up version number.
505 * Revision 1.2 2001/05/17 22:34:44 oes
506 * - Added hint on GIF char array generation to jcc.c
507 * - Cleaned CRLF's from the sources and related files
508 * - Repaired logging for REF and FRC
510 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
511 * Initial import of version 2.9.3 source tree
514 *********************************************************************/
520 #include <sys/types.h>
527 #ifdef FEATURE_PTHREAD
529 #endif /* def FEATURE_PTHREAD */
532 # ifndef FEATURE_PTHREAD
536 # include <windows.h>
537 # include <process.h>
538 # endif /* ndef FEATURE_PTHREAD */
541 # ifndef _WIN_CONSOLE
543 # endif /* ndef _WIN_CONSOLE */
545 #else /* ifndef _WIN32 */
547 # if !defined (__OS2__)
549 # include <sys/wait.h>
550 # endif /* ndef __OS2__ */
551 # include <sys/time.h>
552 # include <sys/stat.h>
553 # include <sys/ioctl.h>
556 #include <sys/termios.h>
567 # include <socket.h> /* BeOS has select() for sockets only. */
568 # include <OS.h> /* declarations for threads and stuff. */
571 # if defined(__EMX__) || defined(__OS2__)
572 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
577 #define bzero(B,N) memset(B,0x00,n)
592 #include "killpopup.h"
593 #include "miscutil.h"
595 #include "jbsockets.h"
600 #include "urlmatch.h"
602 const char jcc_h_rcs[] = JCC_H_VERSION;
603 const char project_h_rcs[] = PROJECT_H_VERSION;
606 struct client_state clients[1];
607 struct file_list files[1];
609 #ifdef FEATURE_STATISTICS
610 int urls_read = 0; /* total nr of urls read inc rejected */
611 int urls_rejected = 0; /* total nr of urls rejected */
612 #endif /* def FEATURE_STATISTICS */
614 #ifdef FEATURE_GRACEFUL_TERMINATION
618 static void listen_loop(void);
619 static void chat(struct client_state *csp);
621 void serve(struct client_state *csp);
622 #else /* ifndef AMIGA */
623 static void serve(struct client_state *csp);
624 #endif /* def AMIGA */
627 static int32 server_thread(void *data);
628 #endif /* def __BEOS__ */
631 #define sleep(N) Sleep(((N) * 1000))
635 #define sleep(N) DosSleep(((N) * 100))
638 #if defined(unix) || defined(__EMX__)
640 const char *pidfile = NULL;
641 int received_hup_signal = 0;
642 #endif /* defined unix */
644 /* The vanilla wafer. */
645 static const char VANILLA_WAFER[] =
646 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
647 "Do_not_send_me_any_copyrighted_information_other_than_the_"
648 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
649 "In_particular_do_not_send_me_any_cookies_that_"
650 "are_subject_to_a_claim_of_copyright_by_anybody._"
651 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
652 "(copyright_or_otherwise)_applying_to_any_cookie._";
655 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
656 /*********************************************************************
658 * Function : sig_handler
660 * Description : Signal handler for different signals.
661 * Exit gracefully on ABRT, TERM and INT
662 * or set a flag that will cause the errlog
663 * to be reopened by the main thread on HUP.
666 * 1 : the_signal = the signal cause this function to call
670 *********************************************************************/
671 static void sig_handler(int the_signal)
678 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
686 received_hup_signal = 1;
691 * We shouldn't be here, unless we catch signals
692 * in main() that we can't handle here!
694 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
702 /*********************************************************************
706 * Description : Once a connection to the client has been accepted,
707 * this function is called (via serve()) to handle the
708 * main business of the communication. When this
709 * function returns, the caller must close the client
713 * 1 : csp = Current client state (buffers, headers, etc...)
715 * Returns : On success, the number of bytes written are returned (zero
716 * indicates nothing was written). On error, -1 is returned,
717 * and errno is set appropriately. If count is zero and the
718 * file descriptor refers to a regular file, 0 will be
719 * returned without causing any other effect. For a special
720 * file, the results are not portable.
722 *********************************************************************/
723 static void chat(struct client_state *csp)
726 * This next lines are a little ugly, but they simplifies the if statements
727 * below. Basically if TOGGLE, then we want the if to test if the
728 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
729 * then we want the if to test for CSP_FLAG_FORCED , else we don't
731 #ifdef FEATURE_TOGGLE
732 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
733 #else /* ifndef FEATURE_TOGGLE */
734 # define IS_TOGGLED_ON_AND
735 #endif /* ndef FEATURE_TOGGLE */
736 #ifdef FEATURE_FORCE_LOAD
737 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
738 #else /* ifndef FEATURE_FORCE_LOAD */
739 # define IS_NOT_FORCED_AND
740 #endif /* def FEATURE_FORCE_LOAD */
742 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
744 char buf[BUFFER_SIZE];
752 int ms_iis5_hack = 0;
754 const struct forward_spec * fwd;
755 struct http_request *http;
756 int len; /* for buffer sizes */
757 #ifdef FEATURE_KILL_POPUPS
758 int block_popups; /* bool, 1==will block popups */
759 int block_popups_now = 0; /* bool, 1==currently blocking popups */
760 #endif /* def FEATURE_KILL_POPUPS */
762 int pcrs_filter; /* bool, 1==will filter through pcrs */
763 int gif_deanimate; /* bool, 1==will deanimate gifs */
765 /* Function that does the content filtering for the current request */
766 char *(*content_filter)() = NULL;
768 /* Skeleton for HTTP response, if we should intercept the request */
769 struct http_response *rsp;
774 * Read the client's request. Note that since we're not using select() we
775 * could get blocked here if a client connected, then didn't say anything!
780 len = read_socket(csp->cfd, buf, sizeof(buf));
782 if (len <= 0) break; /* error! */
784 add_to_iob(csp, buf, len);
786 req = get_header(csp);
790 break; /* no HTTP request! */
795 continue; /* more to come! */
798 #ifdef FEATURE_FORCE_LOAD
799 /* If this request contains the FORCE_PREFIX,
800 * better get rid of it now and set the force flag --oes
803 if (strstr(req, FORCE_PREFIX))
805 strclean(req, FORCE_PREFIX);
806 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
807 csp->flags |= CSP_FLAG_FORCED;
810 #endif /* def FEATURE_FORCE_LOAD */
812 parse_http_request(req, http, csp);
817 if (http->cmd == NULL)
819 strcpy(buf, CHEADER);
820 write_socket(csp->cfd, buf, strlen(buf));
822 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
827 /* decide how to route the HTTP request */
829 if ((fwd = forward_url(http, csp)) == NULL)
831 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
832 /* Never get here - LOG_LEVEL_FATAL causes program exit */
835 /* build the http request to send to the server
836 * we have to do one of the following:
838 * create = use the original HTTP request to create a new
839 * HTTP request that has either the path component
840 * without the http://domainspec (w/path) or the
841 * full orininal URL (w/url)
842 * Note that the path and/or the HTTP version may
843 * have been altered by now.
845 * connect = Open a socket to the host:port of the server
846 * and short-circuit server and client socket.
848 * pass = Pass the request unchanged if forwarding a CONNECT
849 * request to a parent proxy. Note that we'll be sending
850 * the CFAIL message ourselves if connecting to the parent
851 * fails, but we won't send a CSUCCEED message if it works,
852 * since that would result in a double message (ours and the
853 * parent's). After sending the request to the parent, we simply
859 * +--------+--------+
861 * 0 | create | connect|
863 * Forwarding +--------+--------+
865 * 1 | create | pass |
867 * +--------+--------+
872 * Determine the actions for this URL
874 #ifdef FEATURE_TOGGLE
875 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
877 /* Most compatible set of actions (i.e. none) */
878 init_current_action(csp->action);
881 #endif /* ndef FEATURE_TOGGLE */
883 url_actions(http, csp);
888 * Check if a CONNECT request is allowable:
889 * In the absence of a +limit-connect action, allow only port 443.
890 * If there is an action, allow whatever matches the specificaton.
894 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
895 || (csp->action->flags & ACTION_LIMIT_CONNECT
896 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
898 strcpy(buf, CFORBIDDEN);
899 write_socket(csp->cfd, buf, strlen(buf));
901 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
902 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
910 * Downgrade http version from 1.1 to 1.0 if +downgrade
913 if ( (http->ssl == 0)
914 && (!strcmpic(http->ver, "HTTP/1.1"))
915 && (csp->action->flags & ACTION_DOWNGRADE))
918 http->ver = strdup("HTTP/1.0");
920 if (http->ver == NULL)
922 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
927 * Save a copy of the original request for logging
929 http->ocmd = strdup(http->cmd);
931 if (http->ocmd == NULL)
933 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
937 * (Re)build the HTTP request for non-SSL requests.
938 * If forwarding, use the whole URL, else, use only the path.
944 http->cmd = strdup(http->gpc);
945 string_append(&http->cmd, " ");
947 if (fwd->forward_host)
949 string_append(&http->cmd, http->url);
953 string_append(&http->cmd, http->path);
956 string_append(&http->cmd, " ");
957 string_append(&http->cmd, http->ver);
959 if (http->cmd == NULL)
961 log_error(LOG_LEVEL_FATAL, "Out of memory rewiting SSL command");
964 enlist(csp->headers, http->cmd);
967 #ifdef FEATURE_COOKIE_JAR
969 * If we're logging cookies in a cookie jar, and the user has not
970 * supplied any wafers, and the user has not told us to suppress the
971 * vanilla wafer, then send the vanilla wafer.
973 if ((csp->config->jarfile != NULL)
974 && list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
975 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
977 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
979 #endif /* def FEATURE_COOKIE_JAR */
982 #ifdef FEATURE_KILL_POPUPS
983 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
984 #endif /* def FEATURE_KILL_POPUPS */
986 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
987 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
989 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
991 /* grab the rest of the client's headers */
995 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
997 len = read_socket(csp->cfd, buf, sizeof(buf));
1000 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1003 add_to_iob(csp, buf, len);
1007 if (p == NULL) break;
1009 enlist(csp->headers, p);
1013 * We have a request. Now, check to see if we need to
1014 * intercept it, i.e. If ..
1018 /* a CGI call was detected and answered */
1019 (NULL != (rsp = dispatch_cgi(csp)))
1021 /* or we are enabled and... */
1022 || (IS_ENABLED_AND (
1024 /* ..the request was blocked */
1025 ( NULL != (rsp = block_url(csp)))
1027 /* ..or untrusted */
1028 #ifdef FEATURE_TRUST
1029 || ( NULL != (rsp = trust_url(csp)))
1030 #endif /* def FEATURE_TRUST */
1032 /* ..or a fast redirect kicked in */
1033 #ifdef FEATURE_FAST_REDIRECTS
1034 || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) &&
1035 (NULL != (rsp = redirect_url(csp))))
1036 #endif /* def FEATURE_FAST_REDIRECTS */
1040 /* Write the answer to the client */
1041 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1042 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1044 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1047 #ifdef FEATURE_STATISTICS
1048 /* Count as a rejected request */
1049 csp->flags |= CSP_FLAG_REJECTED;
1050 #endif /* def FEATURE_STATISTICS */
1052 /* Log (FIXME: All intercept reasons apprear as "crunch" with Status 200) */
1053 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1054 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1056 /* Clean up and return */
1057 free_http_response(rsp);
1061 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1063 if (fwd->forward_host)
1065 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1066 fwd->forward_host, fwd->forward_port, http->hostport);
1070 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1073 /* here we connect to the server, gateway, or the forwarder */
1075 csp->sfd = forwarded_connect(fwd, http, csp);
1077 if (csp->sfd == JB_INVALID_SOCKET)
1079 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1082 if (errno == EINVAL)
1084 rsp = error_response(csp, "no-such-domain", errno);
1086 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1087 csp->ip_addr_str, http->ocmd);
1091 rsp = error_response(csp, "connect-failed", errno);
1093 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1094 csp->ip_addr_str, http->ocmd);
1098 /* Write the answer to the client */
1101 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1102 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1104 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1108 free_http_response(rsp);
1112 log_error(LOG_LEVEL_CONNECT, "OK");
1114 hdr = sed(client_patterns, add_client_headers, csp);
1117 /* FIXME Should handle error properly */
1118 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1121 list_remove_all(csp->headers);
1123 if (fwd->forward_host || (http->ssl == 0))
1125 /* write the client's (modified) header to the server
1126 * (along with anything else that may be in the buffer)
1129 if (write_socket(csp->sfd, hdr, strlen(hdr))
1130 || (flush_socket(csp->sfd, csp) < 0))
1132 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1135 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1136 csp->ip_addr_str, http->ocmd);
1138 rsp = error_response(csp, "connect-failed", errno);
1142 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1143 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1145 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1149 free_http_response(rsp);
1157 * We're running an SSL tunnel and we're not forwarding,
1158 * so just send the "connect succeeded" message to the
1159 * client, flush the rest, and get out of the way.
1161 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1162 csp->ip_addr_str, http->ocmd);
1164 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1172 /* we're finished with the client's header */
1175 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1177 /* pass data between the client and server
1178 * until one or the other shuts down the connection.
1187 * FD_ZERO here seems to point to an errant macro which crashes.
1188 * So do this by hand for now...
1190 memset(&rfds,0x00,sizeof(fd_set));
1194 FD_SET(csp->cfd, &rfds);
1195 FD_SET(csp->sfd, &rfds);
1197 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1201 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1205 /* this is the body of the browser's request
1206 * just read it and write it.
1209 if (FD_ISSET(csp->cfd, &rfds))
1211 len = read_socket(csp->cfd, buf, sizeof(buf));
1215 break; /* "game over, man" */
1218 if (write_socket(csp->sfd, buf, (size_t)len))
1220 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1227 * The server wants to talk. It could be the header or the body.
1228 * If `hdr' is null, then it's the header otherwise it's the body.
1229 * FIXME: Does `hdr' really mean `host'? No.
1233 if (FD_ISSET(csp->sfd, &rfds))
1236 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1240 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1242 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1243 csp->ip_addr_str, http->ocmd);
1245 rsp = error_response(csp, "connect-failed", errno);
1249 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1250 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1252 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1256 free_http_response(rsp);
1260 /* Add a trailing zero. This lets filter_popups
1261 * use string operations.
1265 #ifdef FEATURE_KILL_POPUPS
1266 /* Filter the popups on this read. */
1267 if (block_popups_now)
1269 filter_popups(buf, csp);
1271 #endif /* def FEATURE_KILL_POPUPS */
1273 /* Normally, this would indicate that we've read
1274 * as much as the server has sent us and we can
1275 * close the client connection. However, Microsoft
1276 * in its wisdom has released IIS/5 with a bug that
1277 * prevents it from sending the trailing \r\n in
1278 * a 302 redirect header (and possibly other headers).
1279 * To work around this if we've haven't parsed
1280 * a full header we'll append a trailing \r\n
1281 * and see if this now generates a valid one.
1283 * This hack shouldn't have any impacts. If we've
1284 * already transmitted the header or if this is a
1285 * SSL connection, then we won't bother with this
1286 * hack. So we only work on partially received
1287 * headers. If we append a \r\n and this still
1288 * doesn't generate a valid header, then we won't
1289 * transmit anything to the client.
1294 if (server_body || http->ssl)
1297 * If we have been buffering up the document,
1298 * now is the time to apply content modification
1299 * and send the result to the client.
1304 * If the content filter fails, use the original
1305 * buffer and length.
1306 * (see p != NULL ? p : csp->iob->cur below)
1308 if (NULL == (p = (*content_filter)(csp)))
1310 csp->content_length = csp->iob->eod - csp->iob->cur;
1313 hdr = sed(server_patterns, add_server_headers, csp);
1316 /* FIXME Should handle error properly */
1317 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1320 if (write_socket(csp->cfd, hdr, strlen(hdr))
1321 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1323 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1333 break; /* "game over, man" */
1337 * This is NOT the body, so
1338 * Let's pretend the server just sent us a blank line.
1340 len = sprintf(buf, "\r\n");
1343 * Now, let the normal header parsing algorithm below do its
1344 * job. If it fails, we'll exit instead of continuing.
1351 * If this is an SSL connection or we're in the body
1352 * of the server document, just write it to the client,
1353 * unless we need to buffer the body for later content-filtering
1356 if (server_body || http->ssl)
1360 add_to_iob(csp, buf, len);
1363 * If the buffer limit will be reached on the next read,
1364 * switch to non-filtering mode, i.e. make & write the
1365 * header, flush the socket and get out of the way.
1367 if (((size_t)(csp->iob->eod - csp->iob->buf)) + (size_t)BUFFER_SIZE > csp->config->buffer_limit)
1371 log_error(LOG_LEVEL_ERROR, "Buffer size limit reached! Flushing and stepping back.");
1373 hdr = sed(server_patterns, add_server_headers, csp);
1376 /* FIXME Should handle error properly */
1377 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1380 hdrlen = strlen(hdr);
1381 byte_count += hdrlen;
1383 if (write_socket(csp->cfd, hdr, hdrlen)
1384 || ((len = flush_socket(csp->cfd, csp)) < 0))
1386 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1395 content_filter = NULL;
1402 if (write_socket(csp->cfd, buf, (size_t)len))
1404 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1413 /* we're still looking for the end of the
1414 * server's header ... (does that make header
1415 * parsing an "out of body experience" ?
1418 /* buffer up the data we just read */
1419 add_to_iob(csp, buf, len);
1421 /* get header lines from the iob */
1423 while ((p = get_header(csp)) != NULL)
1427 /* see following note */
1430 enlist(csp->headers, p);
1434 /* NOTE: there are no "empty" headers so
1435 * if the pointer `p' is not NULL we must
1436 * assume that we reached the end of the
1437 * buffer before we hit the end of the header.
1444 /* Well, we tried our MS IIS/5
1445 * hack and it didn't work.
1446 * The header is incomplete
1447 * and there isn't anything
1448 * we can do about it.
1454 /* Since we have to wait for
1455 * more from the server before
1456 * we can parse the headers
1457 * we just continue here.
1463 /* we have now received the entire header.
1464 * filter it and send the result to the client
1467 hdr = sed(server_patterns, add_server_headers, csp);
1470 /* FIXME Should handle error properly */
1471 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1474 #ifdef FEATURE_KILL_POPUPS
1475 /* Start blocking popups if appropriate. */
1477 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1478 !http->ssl && /* We talk plaintext */
1479 block_popups) /* Policy allows */
1481 block_popups_now = 1;
1483 * Filter the part of the body that came in the same read
1484 * as the last headers:
1486 filter_popups(csp->iob->cur, csp);
1489 #endif /* def FEATURE_KILL_POPUPS */
1491 /* Buffer and pcrs filter this if appropriate. */
1493 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1494 !http->ssl && /* We talk plaintext */
1495 pcrs_filter) /* Policy allows */
1497 content_filter = pcrs_filter_response;
1500 /* Buffer and gif_deanimate this if appropriate. */
1502 if ((csp->content_type & CT_GIF) && /* It's a image/gif MIME-Type */
1503 !http->ssl && /* We talk plaintext */
1504 gif_deanimate) /* Policy allows */
1506 content_filter = gif_deanimate_response;
1510 * Only write if we're not buffering for content modification
1512 if (!content_filter)
1514 /* write the server's (modified) header to
1515 * the client (along with anything else that
1516 * may be in the buffer)
1519 if (write_socket(csp->cfd, hdr, strlen(hdr))
1520 || ((len = flush_socket(csp->cfd, csp)) < 0))
1522 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1524 /* the write failed, so don't bother
1525 * mentioning it to the client...
1526 * it probably can't hear us anyway.
1535 /* we're finished with the server's header */
1540 /* If this was a MS IIS/5 hack then it means
1541 * the server has already closed the
1542 * connection. Nothing more to read. Time
1553 return; /* huh? we should never get here */
1556 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1557 csp->ip_addr_str, http->ocmd, byte_count);
1561 /*********************************************************************
1565 * Description : This is little more than chat. We only "serve" to
1566 * to close any socket that chat may have opened.
1569 * 1 : csp = Current client state (buffers, headers, etc...)
1573 *********************************************************************/
1575 void serve(struct client_state *csp)
1576 #else /* ifndef AMIGA */
1577 static void serve(struct client_state *csp)
1578 #endif /* def AMIGA */
1581 close_socket(csp->cfd);
1583 if (csp->sfd != JB_INVALID_SOCKET)
1585 close_socket(csp->sfd);
1588 csp->flags &= ~CSP_FLAG_ACTIVE;
1594 /*********************************************************************
1596 * Function : server_thread
1598 * Description : We only exist to call `serve' in a threaded environment.
1601 * 1 : data = Current client state (buffers, headers, etc...)
1603 * Returns : Always 0.
1605 *********************************************************************/
1606 static int32 server_thread(void *data)
1608 serve((struct client_state *) data);
1615 /*********************************************************************
1619 * Description : Print usage info & exit.
1621 * Parameters : Pointer to argv[0] for identifying ourselves
1625 *********************************************************************/
1626 void usage(const char *myname)
1628 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
1629 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
1630 "Aborting.\n", myname);
1637 /*********************************************************************
1641 * Description : Load the config file and start the listen loop.
1642 * This function is a lot more *sane* with the `load_config'
1643 * and `listen_loop' functions; although it stills does
1644 * a *little* too much for my taste.
1647 * 1 : argc = Number of parameters (including $0).
1648 * 2 : argv = Array of (char *)'s to the parameters.
1650 * Returns : 1 if : can't open config file, unrecognized directive,
1651 * stats requested in multi-thread mode, can't open the
1652 * log file, can't open the jar file, listen port is invalid,
1653 * any load fails, and can't bind port.
1655 * Else main never returns, the process must be signaled
1656 * to terminate execution. Or, on Windows, use the
1657 * "File", "Exit" menu option.
1659 *********************************************************************/
1661 int real_main(int argc, const char *argv[])
1663 int main(int argc, const char *argv[])
1668 struct passwd *pw = NULL;
1669 struct group *grp = NULL;
1677 #if !defined(_WIN32)
1685 * Parse the command line arguments
1687 while (++argc_pos < argc)
1689 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1691 if (strcmp(argv[argc_pos], "--help") == 0)
1696 else if(strcmp(argv[argc_pos], "--version") == 0)
1698 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
1702 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
1707 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
1709 if (++argc_pos == argc) usage(argv[0]);
1710 pidfile = strdup(argv[argc_pos]);
1713 else if (strcmp(argv[argc_pos], "--user" ) == 0)
1715 if (++argc_pos == argc) usage(argv[argc_pos]);
1717 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
1720 if (NULL == (grp = getgrnam(p)))
1722 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
1726 if (NULL == (pw = getpwnam(argv[argc_pos])))
1728 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
1731 if (p != NULL) *--p = '\0';
1733 #endif /* defined(unix) */
1735 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
1737 configfile = argv[argc_pos];
1740 } /* -END- while (more arguments) */
1743 if ( *configfile != '/' )
1747 /* make config-filename absolute here */
1748 if ( !(basedir = getcwd( NULL, 1024 )))
1750 perror("get working dir failed");
1754 if ( !(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 )))
1756 perror("malloc failed");
1759 strcpy( abs_file, basedir );
1760 strcat( abs_file, "/" );
1761 strcat( abs_file, configfile );
1762 configfile = abs_file;
1764 #endif /* defined unix */
1771 #elif defined(_WIN32)
1776 * Unix signal handling
1778 * Catch the abort, interrupt and terminate signals for a graceful exit
1779 * Catch the hangup signal so the errlog can be reopened.
1780 * Ignore the broken pipe and child signals
1781 * FIXME: Isn't ignoring the default for SIGCHLD anyway and why ignore SIGPIPE?
1783 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1786 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
1787 const int ignored_signals[] = { SIGPIPE, SIGCHLD, 0 };
1789 for (idx = 0; catched_signals[idx] != 0; idx++)
1791 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
1793 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
1797 for (idx = 0; ignored_signals[idx] != 0; idx++)
1799 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
1801 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
1806 #else /* ifdef _WIN32 */
1807 # ifdef _WIN_CONSOLE
1809 * We *are* in a windows console app.
1810 * Print a verbose messages about FAQ's and such
1812 printf(win32_blurb);
1813 # endif /* def _WIN_CONSOLE */
1814 #endif /* def _WIN32 */
1817 /* Initialize the CGI subsystem */
1818 cgi_init_error_messages();
1821 * If runnig on unix and without the --nodaemon
1822 * option, become a daemon. I.e. fork, detach
1823 * from tty and get process group leadership
1836 if ( pid < 0 ) /* error */
1841 else if ( pid != 0 ) /* parent */
1846 * must check for errors
1847 * child died due to missing files aso
1850 wpid = waitpid( pid, &status, WNOHANG );
1859 /* Should be more portable, but not as well tested */
1864 #else /* ndef __FreeBSD__ */
1866 #endif /* ndef __FreeBSD__ */
1867 fd = open("/dev/tty", O_RDONLY);
1870 /* no error check here */
1871 ioctl( fd, TIOCNOTTY,0 );
1875 /* FIXME: should close stderr (fd 2) here too, but the test
1877 * and load config file is done in listen_loop() and puts
1878 * some messages on stderr there.
1885 } /* -END- if (!no_daemon) */
1888 * As soon as we have written the PID file, we can switch
1889 * to the user and group ID indicated by the --user option
1895 if (((NULL != grp) && setgid(grp->gr_gid)) || (setgid(pw->pw_gid)))
1897 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
1899 if (setuid(pw->pw_uid))
1901 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
1905 #endif /* defined unix */
1915 /*********************************************************************
1917 * Function : bind_port_helper
1919 * Description : Bind the listen port. Handles logging, and aborts
1923 * 1 : config = Privoxy configuration. Specifies port
1926 * Returns : Port that was opened.
1928 *********************************************************************/
1929 static jb_socket bind_port_helper(struct configuration_spec * config)
1934 if ( (config->haddr != NULL)
1935 && (config->haddr[0] == '1')
1936 && (config->haddr[1] == '2')
1937 && (config->haddr[2] == '7')
1938 && (config->haddr[3] == '.') )
1940 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
1943 else if (config->haddr == NULL)
1945 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
1950 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
1951 config->hport, config->haddr);
1954 result = bind_port(config->haddr, config->hport, &bfd);
1961 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
1962 "There may be another Privoxy or some other "
1963 "proxy running on port %d",
1964 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
1965 config->hport, config->hport);
1968 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
1969 "The hostname is not resolvable",
1970 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
1973 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
1974 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
1977 /* shouldn't get here */
1978 return JB_INVALID_SOCKET;
1981 config->need_bind = 0;
1987 /*********************************************************************
1989 * Function : listen_loop
1991 * Description : bind the listen port and enter a "FOREVER" listening loop.
1997 *********************************************************************/
1998 static void listen_loop(void)
2000 struct client_state *csp = NULL;
2002 struct configuration_spec * config;
2004 config = load_config();
2006 bfd = bind_port_helper(config);
2008 #ifdef FEATURE_GRACEFUL_TERMINATION
2009 while (!g_terminate)
2014 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2015 while (waitpid(-1, NULL, WNOHANG) > 0)
2017 /* zombie children */
2019 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2022 * Free data that was used by died threads
2028 * Re-open the errlog after HUP signal
2030 if (received_hup_signal)
2032 init_error_log(Argv[0], config->logfile, config->debug);
2033 received_hup_signal = 0;
2038 #ifdef FEATURE_COOKIE_JAR
2040 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2041 * already open. I think unload_configfile() is not being run, which should do
2042 * this work. Until that can get resolved, we'll use this workaround.
2046 if (csp->config->jar)
2048 fclose(csp->config->jar);
2049 csp->config->jar = NULL;
2051 #endif /* FEATURE_COOKIE_JAR */
2052 #endif /* __OS2__ */
2054 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2056 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2060 csp->flags |= CSP_FLAG_ACTIVE;
2061 csp->sfd = JB_INVALID_SOCKET;
2063 csp->config = config = load_config();
2065 if ( config->need_bind )
2068 * Since we were listening to the "old port", we will not see
2069 * a "listen" param change until the next IJB request. So, at
2070 * least 1 more request must be made for us to find the new
2071 * setting. I am simply closing the old socket and binding the
2074 * Which-ever is correct, we will serve 1 more page via the
2075 * old settings. This should probably be a "show-proxy-args"
2076 * request. This should not be a so common of an operation
2077 * that this will hurt people's feelings.
2082 bfd = bind_port_helper(config);
2085 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2087 if (!accept_connection(csp, bfd))
2089 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2102 log_error(LOG_LEVEL_CONNECT, "OK");
2105 #ifdef FEATURE_TOGGLE
2108 csp->flags |= CSP_FLAG_TOGGLED_ON;
2110 #endif /* def FEATURE_TOGGLE */
2112 if (run_loader(csp))
2114 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2115 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2119 if (block_acl(NULL,csp))
2121 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2122 close_socket(csp->cfd);
2126 #endif /* def FEATURE_ACL */
2128 /* add it to the list of clients */
2129 csp->next = clients->next;
2130 clients->next = csp;
2132 if (config->multi_threaded)
2136 /* this is a switch () statment in the C preprocessor - ugh */
2137 #undef SELECTED_ONE_OPTION
2139 /* Use Pthreads in preference to native code */
2140 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2141 #define SELECTED_ONE_OPTION
2143 pthread_t the_thread;
2144 pthread_attr_t attrs;
2146 pthread_attr_init(&attrs);
2147 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2148 child_id = (pthread_create(&the_thread, &attrs,
2149 (void*)serve, csp) ? -1 : 0);
2150 pthread_attr_destroy(&attrs);
2154 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2155 #define SELECTED_ONE_OPTION
2156 child_id = _beginthread(
2157 (void (*)(void *))serve,
2162 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2163 #define SELECTED_ONE_OPTION
2164 child_id = _beginthread(
2165 (void(* _Optlink)(void*))serve,
2171 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2172 #define SELECTED_ONE_OPTION
2174 thread_id tid = spawn_thread
2175 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2177 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2179 child_id = (int) tid;
2188 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2189 #define SELECTED_ONE_OPTION
2190 csp->cfd = ReleaseSocket(csp->cfd, -1);
2191 if((child_id = (int)CreateNewProcTags(
2192 NP_Entry, (ULONG)server_thread,
2193 NP_Output, Output(),
2194 NP_CloseOutput, FALSE,
2195 NP_Name, (ULONG)"privoxy child",
2196 NP_StackSize, 200*1024,
2200 ((struct Task *)child_id)->tc_UserData = csp;
2201 Signal((struct Task *)child_id, SIGF_SINGLE);
2206 #if !defined(SELECTED_ONE_OPTION)
2209 /* This block is only needed when using fork().
2210 * When using threads, the server thread was
2211 * created and run by the call to _beginthread().
2213 if (child_id == 0) /* child */
2219 else if (child_id > 0) /* parent */
2221 /* in a fork()'d environment, the parent's
2222 * copy of the client socket and the CSP
2226 #if !defined(_WIN32) && defined(__CYGWIN__)
2228 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2229 close_socket(csp->cfd);
2230 csp->flags &= ~CSP_FLAG_ACTIVE;
2234 #undef SELECTED_ONE_OPTION
2235 /* end of cpp switch () */
2237 if (child_id < 0) /* failed */
2239 char buf[BUFFER_SIZE];
2241 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2243 sprintf(buf , "JunkBuster: can't fork: errno = %d", errno);
2245 write_socket(csp->cfd, buf, strlen(buf));
2246 close_socket(csp->cfd);
2247 csp->flags &= ~CSP_FLAG_ACTIVE;
2258 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2260 /* Clean up. Aim: free all memory (no leaks) */
2261 #ifdef FEATURE_GRACEFUL_TERMINATION
2263 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2265 unload_current_config_file();
2266 unload_current_actions_file();
2267 unload_current_re_filterfile();
2268 #ifdef FEATURE_TRUST
2269 unload_current_trust_file();
2272 if (config->multi_threaded)
2279 } while ((clients->next != NULL) && (--i > 0));
2283 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2292 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2293 /* Cleanup - remove taskbar icon etc. */
2298 #endif /* FEATURE_GRACEFUL_TERMINATION */