1 const char jcc_rcs[] = "$Id: jcc.c,v 1.387 2012/09/04 08:37:51 fabiankeil 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) 2001-2012 the
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.
34 *********************************************************************/
40 #include <sys/types.h>
49 # ifndef FEATURE_PTHREAD
55 # endif /* ndef FEATURE_PTHREAD */
60 # endif /* ndef _WIN_CONSOLE */
61 # include "w32svrapi.h"
63 #else /* ifndef _WIN32 */
65 # if !defined (__OS2__)
67 # include <sys/wait.h>
68 # endif /* ndef __OS2__ */
69 # include <sys/time.h>
70 # include <sys/stat.h>
71 # include <sys/ioctl.h>
74 #include <sys/termios.h>
85 # include <socket.h> /* BeOS has select() for sockets only. */
86 # include <OS.h> /* declarations for threads and stuff. */
89 # if defined(__EMX__) || defined(__OS2__)
90 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
95 #define bzero(B,N) memset(B,0x00,n)
110 #include "miscutil.h"
112 #include "jbsockets.h"
117 #include "urlmatch.h"
119 const char jcc_h_rcs[] = JCC_H_VERSION;
120 const char project_h_rcs[] = PROJECT_H_VERSION;
123 struct client_states clients[1];
124 struct file_list files[1];
126 #ifdef FEATURE_STATISTICS
127 int urls_read = 0; /* total nr of urls read inc rejected */
128 int urls_rejected = 0; /* total nr of urls rejected */
129 #endif /* def FEATURE_STATISTICS */
131 #ifdef FEATURE_GRACEFUL_TERMINATION
135 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
136 static void sig_handler(int the_signal);
138 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
139 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
140 static jb_err get_server_headers(struct client_state *csp);
141 static const char *crunch_reason(const struct http_response *rsp);
142 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
143 static char *get_request_line(struct client_state *csp);
144 static jb_err receive_client_request(struct client_state *csp);
145 static jb_err parse_client_request(struct client_state *csp);
146 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
147 static jb_err change_request_destination(struct client_state *csp);
148 static void chat(struct client_state *csp);
149 static void serve(struct client_state *csp);
150 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
151 static void usage(const char *myname);
153 static void initialize_mutexes(void);
154 static jb_socket bind_port_helper(const char *haddr, int hport);
155 static void bind_ports_helper(struct configuration_spec *config, jb_socket sockets[]);
156 static void close_ports_helper(jb_socket sockets[]);
157 static void listen_loop(void);
160 void serve(struct client_state *csp);
161 #else /* ifndef AMIGA */
162 static void serve(struct client_state *csp);
163 #endif /* def AMIGA */
166 static int32 server_thread(void *data);
167 #endif /* def __BEOS__ */
170 #define sleep(N) Sleep(((N) * 1000))
174 #define sleep(N) DosSleep(((N) * 100))
177 #ifdef MUTEX_LOCKS_AVAILABLE
179 * XXX: Does the locking stuff really belong in this file?
181 privoxy_mutex_t log_mutex;
182 privoxy_mutex_t log_init_mutex;
183 privoxy_mutex_t connection_reuse_mutex;
185 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
186 privoxy_mutex_t resolver_mutex;
187 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
189 #ifndef HAVE_GMTIME_R
190 privoxy_mutex_t gmtime_mutex;
191 #endif /* ndef HAVE_GMTIME_R */
193 #ifndef HAVE_LOCALTIME_R
194 privoxy_mutex_t localtime_mutex;
195 #endif /* ndef HAVE_GMTIME_R */
198 privoxy_mutex_t rand_mutex;
199 #endif /* ndef HAVE_RANDOM */
201 #endif /* def MUTEX_LOCKS_AVAILABLE */
204 const char *basedir = NULL;
205 const char *pidfile = NULL;
206 static int received_hup_signal = 0;
207 #endif /* defined unix */
209 /* HTTP snipplets. */
210 static const char CSUCCEED[] =
211 "HTTP/1.1 200 Connection established\r\n"
212 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
214 static const char CHEADER[] =
215 "HTTP/1.1 400 Invalid header received from client\r\n"
216 "Proxy-Agent: Privoxy " VERSION "\r\n"
217 "Content-Type: text/plain\r\n"
218 "Connection: close\r\n\r\n"
219 "Invalid header received from client.\r\n";
221 static const char FTP_RESPONSE[] =
222 "HTTP/1.1 400 Invalid request received from client\r\n"
223 "Content-Type: text/plain\r\n"
224 "Connection: close\r\n\r\n"
225 "Invalid request. Privoxy doesn't support FTP.\r\n";
227 static const char GOPHER_RESPONSE[] =
228 "HTTP/1.1 400 Invalid request received from client\r\n"
229 "Content-Type: text/plain\r\n"
230 "Connection: close\r\n\r\n"
231 "Invalid request. Privoxy doesn't support gopher.\r\n";
233 /* XXX: should be a template */
234 static const char MISSING_DESTINATION_RESPONSE[] =
235 "HTTP/1.1 400 Bad request received from client\r\n"
236 "Proxy-Agent: Privoxy " VERSION "\r\n"
237 "Content-Type: text/plain\r\n"
238 "Connection: close\r\n\r\n"
239 "Bad request. Privoxy was unable to extract the destination.\r\n";
241 /* XXX: should be a template */
242 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
243 "HTTP/1.1 502 Server or forwarder response invalid\r\n"
244 "Proxy-Agent: Privoxy " VERSION "\r\n"
245 "Content-Type: text/plain\r\n"
246 "Connection: close\r\n\r\n"
247 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
249 /* XXX: should be a template */
250 static const char MESSED_UP_REQUEST_RESPONSE[] =
251 "HTTP/1.1 400 Malformed request after rewriting\r\n"
252 "Proxy-Agent: Privoxy " VERSION "\r\n"
253 "Content-Type: text/plain\r\n"
254 "Connection: close\r\n\r\n"
255 "Bad request. Messed up with header filters.\r\n";
257 static const char TOO_MANY_CONNECTIONS_RESPONSE[] =
258 "HTTP/1.1 503 Too many open connections\r\n"
259 "Proxy-Agent: Privoxy " VERSION "\r\n"
260 "Content-Type: text/plain\r\n"
261 "Connection: close\r\n\r\n"
262 "Maximum number of open connections reached.\r\n";
264 static const char CLIENT_CONNECTION_TIMEOUT_RESPONSE[] =
265 "HTTP/1.1 504 Connection timeout\r\n"
266 "Proxy-Agent: Privoxy " VERSION "\r\n"
267 "Content-Type: text/plain\r\n"
268 "Connection: close\r\n\r\n"
269 "The connection timed out because the client request didn't arrive in time.\r\n";
271 /* A function to crunch a response */
272 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
274 /* Crunch function flags */
275 #define CF_NO_FLAGS 0
276 /* Cruncher applies to forced requests as well */
277 #define CF_IGNORE_FORCE 1
278 /* Crunched requests are counted for the block statistics */
279 #define CF_COUNT_AS_REJECT 2
281 /* A crunch function and its flags */
284 const crunch_func_ptr cruncher;
288 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
290 /* Complete list of cruncher functions */
291 static const struct cruncher crunchers_all[] = {
292 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
293 { block_url, CF_COUNT_AS_REJECT },
295 { trust_url, CF_COUNT_AS_REJECT },
296 #endif /* def FEATURE_TRUST */
297 { redirect_url, CF_NO_FLAGS },
298 { dispatch_cgi, CF_IGNORE_FORCE},
302 /* Light version, used after tags are applied */
303 static const struct cruncher crunchers_light[] = {
304 { block_url, CF_COUNT_AS_REJECT },
305 { redirect_url, CF_NO_FLAGS },
311 * XXX: Don't we really mean
317 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
318 /*********************************************************************
320 * Function : sig_handler
322 * Description : Signal handler for different signals.
323 * Exit gracefully on TERM and INT
324 * or set a flag that will cause the errlog
325 * to be reopened by the main thread on HUP.
328 * 1 : the_signal = the signal cause this function to call
332 *********************************************************************/
333 static void sig_handler(int the_signal)
339 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
351 received_hup_signal = 1;
357 * We shouldn't be here, unless we catch signals
358 * in main() that we can't handle here!
360 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
368 /*********************************************************************
370 * Function : client_protocol_is_unsupported
372 * Description : Checks if the client used a known unsupported
373 * protocol and deals with it by sending an error
377 * 1 : csp = Current client state (buffers, headers, etc...)
378 * 2 : req = the first request line send by the client
380 * Returns : TRUE if an error response has been generated, or
381 * FALSE if the request doesn't look invalid.
383 *********************************************************************/
384 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
387 * If it's a FTP or gopher request, we don't support it.
389 * These checks are better than nothing, but they might
390 * not work in all configurations and some clients might
391 * have problems digesting the answer.
393 * They should, however, never cause more problems than
394 * Privoxy's old behaviour (returning the misleading HTML
397 * "Could not resolve http://(ftp|gopher)://example.org").
399 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
401 const char *response = NULL;
402 const char *protocol = NULL;
404 if (!strncmpic(req, "GET ftp://", 10))
406 response = FTP_RESPONSE;
411 response = GOPHER_RESPONSE;
414 log_error(LOG_LEVEL_ERROR,
415 "%s tried to use Privoxy as %s proxy: %s",
416 csp->ip_addr_str, protocol, req);
417 log_error(LOG_LEVEL_CLF,
418 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
420 write_socket(csp->cfd, response, strlen(response));
429 /*********************************************************************
431 * Function : get_request_destination_elsewhere
433 * Description : If the client's request was redirected into
434 * Privoxy without the client's knowledge,
435 * the request line lacks the destination host.
437 * This function tries to get it elsewhere,
438 * provided accept-intercepted-requests is enabled.
440 * "Elsewhere" currently only means "Host: header",
441 * but in the future we may ask the redirecting
442 * packet filter to look the destination up.
444 * If the destination stays unknown, an error
445 * response is send to the client and headers
446 * are freed so that chat() can return directly.
449 * 1 : csp = Current client state (buffers, headers, etc...)
450 * 2 : headers = a header list
452 * Returns : JB_ERR_OK if the destination is now known, or
453 * JB_ERR_PARSE if it isn't.
455 *********************************************************************/
456 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
460 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
462 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
463 " Privoxy isn't configured to accept intercepted requests.",
464 csp->ip_addr_str, csp->http->cmd);
465 /* XXX: Use correct size */
466 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
467 csp->ip_addr_str, csp->http->cmd);
469 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
470 destroy_list(headers);
474 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
476 #ifndef FEATURE_EXTENDED_HOST_PATTERNS
477 /* Split the domain we just got for pattern matching */
478 init_domain_components(csp->http);
485 /* We can't work without destination. Go spread the news.*/
487 req = list_to_text(headers);
489 /* XXX: Use correct size */
490 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
491 csp->ip_addr_str, csp->http->cmd);
492 log_error(LOG_LEVEL_ERROR,
493 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
494 csp->ip_addr_str, csp->http->cmd, req);
497 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
498 destroy_list(headers);
503 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
504 * to get the destination IP address, use it as host directly
505 * or do a reverse DNS lookup first.
510 /*********************************************************************
512 * Function : get_server_headers
514 * Description : Parses server headers in iob and fills them
515 * into csp->headers so that they can later be
519 * 1 : csp = Current client state (buffers, headers, etc...)
521 * Returns : JB_ERR_OK if everything went fine, or
522 * JB_ERR_PARSE if the headers were incomplete.
524 *********************************************************************/
525 static jb_err get_server_headers(struct client_state *csp)
527 int continue_hack_in_da_house = 0;
530 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
535 * continue hack in da house. Ignore the ending of
536 * this head and continue enlisting header lines.
537 * The reason is described below.
539 enlist(csp->headers, "");
540 continue_hack_in_da_house = 0;
543 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
546 * It's a bodyless continue response, don't
547 * stop header parsing after reaching its end.
549 * As a result Privoxy will concatenate the
550 * next response's head and parse and deliver
551 * the headers as if they belonged to one request.
553 * The client will separate them because of the
554 * empty line between them.
556 * XXX: What we're doing here is clearly against
557 * the intended purpose of the continue header,
558 * and under some conditions (HTTP/1.0 client request)
559 * it's a standard violation.
561 * Anyway, "sort of against the spec" is preferable
562 * to "always getting confused by Continue responses"
563 * (Privoxy's behaviour before this hack was added)
565 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
566 continue_hack_in_da_house = 1;
568 else if (*header == '\0')
571 * If the header is empty, but the Continue hack
572 * isn't active, we can assume that we reached the
573 * end of the buffer before we hit the end of the
576 * Inform the caller an let it decide how to handle it.
581 if (JB_ERR_MEMORY == enlist(csp->headers, header))
584 * XXX: Should we quit the request and return a
585 * out of memory error page instead?
587 log_error(LOG_LEVEL_ERROR,
588 "Out of memory while enlisting server headers. %s lost.",
598 /*********************************************************************
600 * Function : crunch_reason
602 * Description : Translates the crunch reason code into a string.
605 * 1 : rsp = a http_response
607 * Returns : A string with the crunch reason or an error description.
609 *********************************************************************/
610 static const char *crunch_reason(const struct http_response *rsp)
612 char * reason = NULL;
617 return "Internal error while searching for crunch reason";
620 switch (rsp->crunch_reason)
623 reason = "Unsupported HTTP feature";
629 reason = "Untrusted";
632 reason = "Redirected";
638 reason = "DNS failure";
640 case FORWARDING_FAILED:
641 reason = "Forwarding failed";
644 reason = "Connection failure";
647 reason = "Out of memory (may mask other reasons)";
649 case CONNECTION_TIMEOUT:
650 reason = "Connection timeout";
653 reason = "No server data received";
656 reason = "No reason recorded";
664 /*********************************************************************
666 * Function : log_applied_actions
668 * Description : Logs the applied actions if LOG_LEVEL_ACTIONS is
672 * 1 : actions = Current action spec to log
676 *********************************************************************/
677 static void log_applied_actions(const struct current_action_spec *actions)
680 * The conversion to text requires lots of memory allocations so
681 * we only do the conversion if the user is actually interested.
683 if (debug_level_is_enabled(LOG_LEVEL_ACTIONS))
685 char *actions_as_text = actions_to_line_of_text(actions);
686 log_error(LOG_LEVEL_ACTIONS, "%s", actions_as_text);
687 freez(actions_as_text);
692 /*********************************************************************
694 * Function : send_crunch_response
696 * Description : Delivers already prepared response for
697 * intercepted requests, logs the interception
698 * and frees the response.
701 * 1 : csp = Current client state (buffers, headers, etc...)
702 * 1 : rsp = Fully prepared response. Will be freed on exit.
706 *********************************************************************/
707 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
709 const struct http_request *http = csp->http;
713 assert(rsp->head != NULL);
717 log_error(LOG_LEVEL_FATAL, "NULL response in send_crunch_response.");
721 * Extract the status code from the actual head
722 * that will be send to the client. It is the only
723 * way to get it right for all requests, including
724 * the fixed ones for out-of-memory problems.
726 * A head starts like this: 'HTTP/1.1 200...'
730 status_code[0] = rsp->head[9];
731 status_code[1] = rsp->head[10];
732 status_code[2] = rsp->head[11];
733 status_code[3] = '\0';
735 /* Log that the request was crunched and why. */
736 log_applied_actions(csp->action);
737 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
738 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %u",
739 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
741 /* Write the answer to the client */
742 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
743 || write_socket(csp->cfd, rsp->body, rsp->content_length))
745 /* There is nothing we can do about it. */
746 log_error(LOG_LEVEL_ERROR,
747 "Couldn't deliver the error message through client socket %d: %E",
751 /* Clean up and return */
752 if (cgi_error_memory() != rsp)
754 free_http_response(rsp);
760 /*********************************************************************
762 * Function : crunch_response_triggered
764 * Description : Checks if the request has to be crunched,
765 * and delivers the crunch response if necessary.
768 * 1 : csp = Current client state (buffers, headers, etc...)
769 * 2 : crunchers = list of cruncher functions to run
771 * Returns : TRUE if the request was answered with a crunch response
774 *********************************************************************/
775 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
777 struct http_response *rsp = NULL;
778 const struct cruncher *c;
781 * If CGI request crunching is disabled,
782 * check the CGI dispatcher out of order to
783 * prevent unintentional blocks or redirects.
785 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
786 && (NULL != (rsp = dispatch_cgi(csp))))
788 /* Deliver, log and free the interception response. */
789 send_crunch_response(csp, rsp);
790 csp->flags |= CSP_FLAG_CRUNCHED;
794 for (c = crunchers; c->cruncher != NULL; c++)
797 * Check the cruncher if either Privoxy is toggled
798 * on and the request isn't forced, or if the cruncher
799 * applies to forced requests as well.
801 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
802 !(csp->flags & CSP_FLAG_FORCED)) ||
803 (c->flags & CF_IGNORE_FORCE))
805 rsp = c->cruncher(csp);
808 /* Deliver, log and free the interception response. */
809 send_crunch_response(csp, rsp);
810 csp->flags |= CSP_FLAG_CRUNCHED;
811 #ifdef FEATURE_STATISTICS
812 if (c->flags & CF_COUNT_AS_REJECT)
814 csp->flags |= CSP_FLAG_REJECTED;
816 #endif /* def FEATURE_STATISTICS */
827 /*********************************************************************
829 * Function : build_request_line
831 * Description : Builds the HTTP request line.
833 * If a HTTP forwarder is used it expects the whole URL,
834 * web servers only get the path.
837 * 1 : csp = Current client state (buffers, headers, etc...)
838 * 2 : fwd = The forwarding spec used for the request
839 * XXX: Should use http->fwd instead.
840 * 3 : request_line = The old request line which will be replaced.
842 * Returns : Nothing. Terminates in case of memory problems.
844 *********************************************************************/
845 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
847 struct http_request *http = csp->http;
849 assert(http->ssl == 0);
852 * Downgrade http version from 1.1 to 1.0
853 * if +downgrade action applies.
855 if ((csp->action->flags & ACTION_DOWNGRADE)
856 && (!strcmpic(http->ver, "HTTP/1.1")))
859 http->ver = strdup_or_die("HTTP/1.0");
863 * Rebuild the request line.
865 freez(*request_line);
866 *request_line = strdup(http->gpc);
867 string_append(request_line, " ");
869 if (fwd->forward_host)
871 string_append(request_line, http->url);
875 string_append(request_line, http->path);
877 string_append(request_line, " ");
878 string_append(request_line, http->ver);
880 if (*request_line == NULL)
882 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
884 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
888 /*********************************************************************
890 * Function : change_request_destination
892 * Description : Parse a (rewritten) request line and regenerate
893 * the http request data.
896 * 1 : csp = Current client state (buffers, headers, etc...)
898 * Returns : Forwards the parse_http_request() return code.
899 * Terminates in case of memory problems.
901 *********************************************************************/
902 static jb_err change_request_destination(struct client_state *csp)
904 struct http_request *http = csp->http;
907 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
908 free_http_request(http);
909 err = parse_http_request(csp->headers->first->str, http);
910 if (JB_ERR_OK != err)
912 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
913 jb_err_to_string(err));
917 /* XXX: ocmd is a misleading name */
918 http->ocmd = strdup_or_die(http->cmd);
925 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
926 /*********************************************************************
928 * Function : server_response_is_complete
930 * Description : Determines whether we should stop reading
931 * from the server socket.
934 * 1 : csp = Current client state (buffers, headers, etc...)
935 * 2 : content_length = Length of content received so far.
937 * Returns : TRUE if the response is complete,
940 *********************************************************************/
941 static int server_response_is_complete(struct client_state *csp,
942 unsigned long long content_length)
944 int content_length_known = !!(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
946 if (!strcmpic(csp->http->gpc, "HEAD"))
949 * "HEAD" implies no body, we are thus expecting
950 * no content. XXX: incomplete "list" of methods?
952 csp->expected_content_length = 0;
953 content_length_known = TRUE;
956 if (csp->http->status == 204 || csp->http->status == 304)
959 * Expect no body. XXX: incomplete "list" of status codes?
961 csp->expected_content_length = 0;
962 content_length_known = TRUE;
965 return (content_length_known && ((0 == csp->expected_content_length)
966 || (csp->expected_content_length <= content_length)));
970 #ifdef FEATURE_CONNECTION_SHARING
971 /*********************************************************************
973 * Function : wait_for_alive_connections
975 * Description : Waits for alive connections to timeout.
981 *********************************************************************/
982 static void wait_for_alive_connections(void)
984 int connections_alive = close_unusable_connections();
986 while (0 < connections_alive)
988 log_error(LOG_LEVEL_CONNECT,
989 "Waiting for %d connections to timeout.",
992 connections_alive = close_unusable_connections();
995 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
998 #endif /* def FEATURE_CONNECTION_SHARING */
1001 /*********************************************************************
1003 * Function : save_connection_destination
1005 * Description : Remembers a connection for reuse later on.
1008 * 1 : sfd = Open socket to remember.
1009 * 2 : http = The destination for the connection.
1010 * 3 : fwd = The forwarder settings used.
1011 * 3 : server_connection = storage.
1015 *********************************************************************/
1016 void save_connection_destination(jb_socket sfd,
1017 const struct http_request *http,
1018 const struct forward_spec *fwd,
1019 struct reusable_connection *server_connection)
1021 assert(sfd != JB_INVALID_SOCKET);
1022 assert(NULL != http->host);
1024 server_connection->sfd = sfd;
1025 server_connection->host = strdup_or_die(http->host);
1026 server_connection->port = http->port;
1028 assert(NULL != fwd);
1029 assert(server_connection->gateway_host == NULL);
1030 assert(server_connection->gateway_port == 0);
1031 assert(server_connection->forwarder_type == 0);
1032 assert(server_connection->forward_host == NULL);
1033 assert(server_connection->forward_port == 0);
1035 server_connection->forwarder_type = fwd->type;
1036 if (NULL != fwd->gateway_host)
1038 server_connection->gateway_host = strdup_or_die(fwd->gateway_host);
1042 server_connection->gateway_host = NULL;
1044 server_connection->gateway_port = fwd->gateway_port;
1046 if (NULL != fwd->forward_host)
1048 server_connection->forward_host = strdup_or_die(fwd->forward_host);
1052 server_connection->forward_host = NULL;
1054 server_connection->forward_port = fwd->forward_port;
1058 /*********************************************************************
1060 * Function : verify_request_length
1062 * Description : Checks if we already got the whole client requests
1063 * and sets CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ if
1066 * Data that doesn't belong to the current request is
1067 * thrown away to let the client retry on a clean socket.
1069 * XXX: This is a hack until we can deal with multiple
1070 * pipelined requests at the same time.
1074 * 1 : csp = Current client state (buffers, headers, etc...)
1078 *********************************************************************/
1079 static void verify_request_length(struct client_state *csp)
1081 unsigned long long buffered_request_bytes =
1082 (unsigned long long)(csp->iob->eod - csp->iob->cur);
1084 if ((csp->expected_client_content_length != 0)
1085 && (buffered_request_bytes != 0))
1087 if (csp->expected_client_content_length >= buffered_request_bytes)
1089 csp->expected_client_content_length -= buffered_request_bytes;
1090 log_error(LOG_LEVEL_CONNECT, "Reduced expected bytes to %llu "
1091 "to account for the %llu ones we already got.",
1092 csp->expected_client_content_length, buffered_request_bytes);
1096 assert(csp->iob->eod > csp->iob->cur + csp->expected_client_content_length);
1097 csp->iob->eod = csp->iob->cur + csp->expected_client_content_length;
1098 log_error(LOG_LEVEL_CONNECT, "Reducing expected bytes to 0. "
1099 "Marking the server socket tainted after throwing %llu bytes away.",
1100 buffered_request_bytes - csp->expected_client_content_length);
1101 csp->expected_client_content_length = 0;
1102 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1105 if (csp->expected_client_content_length == 0)
1107 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1111 if (!(csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ)
1112 && ((csp->iob->cur[0] != '\0') || (csp->expected_client_content_length != 0)))
1114 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1115 if (strcmpic(csp->http->gpc, "GET")
1116 && strcmpic(csp->http->gpc, "HEAD")
1117 && strcmpic(csp->http->gpc, "TRACE")
1118 && strcmpic(csp->http->gpc, "OPTIONS")
1119 && strcmpic(csp->http->gpc, "DELETE"))
1121 /* XXX: this is an incomplete hack */
1122 csp->flags &= ~CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1123 log_error(LOG_LEVEL_CONNECT,
1124 "There might be a request body. The connection will not be kept alive.");
1128 /* XXX: and so is this */
1129 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1130 log_error(LOG_LEVEL_CONNECT,
1131 "Possible pipeline attempt detected. The connection will not "
1132 "be kept alive and we will only serve the first request.");
1133 /* Nuke the pipelined requests from orbit, just to be sure. */
1134 csp->iob->buf[0] = '\0';
1135 csp->iob->eod = csp->iob->cur = csp->iob->buf;
1140 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1141 log_error(LOG_LEVEL_CONNECT, "Complete client request received.");
1144 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1147 /*********************************************************************
1149 * Function : mark_server_socket_tainted
1151 * Description : Makes sure we don't reuse a server socket
1152 * (if we didn't read everything the server sent
1153 * us reusing the socket would lead to garbage).
1156 * 1 : csp = Current client state (buffers, headers, etc...)
1160 *********************************************************************/
1161 static void mark_server_socket_tainted(struct client_state *csp)
1164 * For consistency we always mark the server socket
1165 * tainted, however, to reduce the log noise we only
1166 * emit a log message if the server socket could have
1167 * actually been reused.
1169 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
1170 && !(csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED))
1172 log_error(LOG_LEVEL_CONNECT,
1173 "Marking the server socket %d tainted.",
1174 csp->server_connection.sfd);
1176 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1179 /*********************************************************************
1181 * Function : get_request_line
1183 * Description : Read the client request line.
1186 * 1 : csp = Current client state (buffers, headers, etc...)
1188 * Returns : Pointer to request line or NULL in case of errors.
1190 *********************************************************************/
1191 static char *get_request_line(struct client_state *csp)
1193 char buf[BUFFER_SIZE];
1194 char *request_line = NULL;
1197 memset(buf, 0, sizeof(buf));
1201 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1203 if (socket_is_still_alive(csp->cfd))
1205 log_error(LOG_LEVEL_CONNECT,
1206 "No request line on socket %d received in time. Timeout: %d.",
1207 csp->cfd, csp->config->socket_timeout);
1208 write_socket(csp->cfd, CLIENT_CONNECTION_TIMEOUT_RESPONSE,
1209 strlen(CLIENT_CONNECTION_TIMEOUT_RESPONSE));
1213 log_error(LOG_LEVEL_CONNECT,
1214 "The client side of the connection on socket %d got "
1215 "closed without sending a complete request line.", csp->cfd);
1220 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1222 if (len <= 0) return NULL;
1225 * If there is no memory left for buffering the
1226 * request, there is nothing we can do but hang up
1228 if (add_to_iob(csp, buf, len))
1233 request_line = get_header(csp->iob);
1235 } while ((NULL != request_line) && ('\0' == *request_line));
1237 return request_line;
1242 /*********************************************************************
1244 * Function : receive_client_request
1246 * Description : Read the client's request (more precisely the
1247 * client headers) and answer it if necessary.
1250 * 1 : csp = Current client state (buffers, headers, etc...)
1252 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
1254 *********************************************************************/
1255 static jb_err receive_client_request(struct client_state *csp)
1257 char buf[BUFFER_SIZE];
1260 struct http_request *http;
1264 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1265 struct list header_list;
1266 struct list *headers = &header_list;
1270 memset(buf, 0, sizeof(buf));
1272 req = get_request_line(csp);
1275 mark_server_socket_tainted(csp);
1276 return JB_ERR_PARSE;
1278 assert(*req != '\0');
1280 if (client_protocol_is_unsupported(csp, req))
1282 return JB_ERR_PARSE;
1285 #ifdef FEATURE_FORCE_LOAD
1287 * If this request contains the FORCE_PREFIX and blocks
1288 * aren't enforced, get rid of it and set the force flag.
1290 if (strstr(req, FORCE_PREFIX))
1292 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
1294 log_error(LOG_LEVEL_FORCE,
1295 "Ignored force prefix in request: \"%s\".", req);
1299 strclean(req, FORCE_PREFIX);
1300 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
1301 csp->flags |= CSP_FLAG_FORCED;
1304 #endif /* def FEATURE_FORCE_LOAD */
1306 err = parse_http_request(req, http);
1308 if (JB_ERR_OK != err)
1310 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1311 /* XXX: Use correct size */
1312 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1313 log_error(LOG_LEVEL_ERROR,
1314 "Couldn't parse request line received from %s: %s",
1315 csp->ip_addr_str, jb_err_to_string(err));
1317 free_http_request(http);
1318 return JB_ERR_PARSE;
1321 /* grab the rest of the client's headers */
1325 p = get_header(csp->iob);
1329 /* There are no additional headers to read. */
1336 * We didn't receive a complete header
1337 * line yet, get the rest of it.
1339 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1341 log_error(LOG_LEVEL_ERROR,
1342 "Stopped grabbing the client headers.");
1343 destroy_list(headers);
1344 return JB_ERR_PARSE;
1347 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1350 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1351 destroy_list(headers);
1352 return JB_ERR_PARSE;
1355 if (add_to_iob(csp, buf, len))
1358 * If there is no memory left for buffering the
1359 * request, there is nothing we can do but hang up
1361 destroy_list(headers);
1362 return JB_ERR_MEMORY;
1368 * We were able to read a complete
1369 * header and can finally enlist it.
1376 if (http->host == NULL)
1379 * If we still don't know the request destination,
1380 * the request is invalid or the client uses
1381 * Privoxy without its knowledge.
1383 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1386 * Our attempts to get the request destination
1387 * elsewhere failed or Privoxy is configured
1388 * to only accept proxy requests.
1390 * An error response has already been send
1391 * and we're done here.
1393 return JB_ERR_PARSE;
1398 * Determine the actions for this URL
1400 #ifdef FEATURE_TOGGLE
1401 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1403 /* Most compatible set of actions (i.e. none) */
1404 init_current_action(csp->action);
1407 #endif /* ndef FEATURE_TOGGLE */
1409 get_url_actions(csp, http);
1413 * Save a copy of the original request for logging
1415 http->ocmd = strdup_or_die(http->cmd);
1416 enlist(csp->headers, http->cmd);
1418 /* Append the previously read headers */
1419 list_append_list_unique(csp->headers, headers);
1420 destroy_list(headers);
1427 /*********************************************************************
1429 * Function : parse_client_request
1431 * Description : Parses the client's request and decides what to do
1434 * Note that since we're not using select() we could get
1435 * blocked here if a client connected, then didn't say
1439 * 1 : csp = Current client state (buffers, headers, etc...)
1441 * Returns : JB_ERR_OK or JB_ERR_PARSE
1443 *********************************************************************/
1444 static jb_err parse_client_request(struct client_state *csp)
1446 struct http_request *http = csp->http;
1449 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1450 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
1451 && (!strcmpic(csp->http->ver, "HTTP/1.1"))
1452 && (csp->http->ssl == 0))
1454 /* Assume persistence until further notice */
1455 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
1458 if (csp->http->ssl == 0)
1460 csp->expected_client_content_length = get_expected_content_length(csp->headers);
1461 verify_request_length(csp);
1463 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1465 err = sed(csp, FILTER_CLIENT_HEADERS);
1466 if (JB_ERR_OK != err)
1468 /* XXX: Should be handled in sed(). */
1469 assert(err == JB_ERR_PARSE);
1470 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
1472 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
1474 /* Check request line for rewrites. */
1475 if ((NULL == csp->headers->first->str)
1476 || (strcmp(http->cmd, csp->headers->first->str) &&
1477 (JB_ERR_OK != change_request_destination(csp))))
1480 * A header filter broke the request line - bail out.
1482 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
1483 /* XXX: Use correct size */
1484 log_error(LOG_LEVEL_CLF,
1485 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
1486 log_error(LOG_LEVEL_ERROR,
1487 "Invalid request line after applying header filters.");
1488 free_http_request(http);
1490 return JB_ERR_PARSE;
1498 /*********************************************************************
1502 * Description : Once a connection from the client has been accepted,
1503 * this function is called (via serve()) to handle the
1504 * main business of the communication. This function
1505 * returns after dealing with a single request. It can
1506 * be called multiple times with the same client socket
1507 * if the client is keeping the connection alive.
1509 * The decision whether or not a client connection will
1510 * be kept alive is up to the caller which also must
1511 * close the client socket when done.
1513 * FIXME: chat is nearly thousand lines long.
1517 * 1 : csp = Current client state (buffers, headers, etc...)
1519 * Returns : Nothing.
1521 *********************************************************************/
1522 static void chat(struct client_state *csp)
1524 char buf[BUFFER_SIZE];
1531 int ms_iis5_hack = 0;
1532 unsigned long long byte_count = 0;
1533 const struct forward_spec *fwd;
1534 struct http_request *http;
1535 long len = 0; /* for buffer sizes (and negative error codes) */
1536 int buffer_and_filter_content = 0;
1538 /* Skeleton for HTTP response, if we should intercept the request */
1539 struct http_response *rsp;
1540 struct timeval timeout;
1541 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1542 int watch_client_socket = 1;
1545 memset(buf, 0, sizeof(buf));
1549 if (receive_client_request(csp) != JB_ERR_OK)
1553 if (parse_client_request(csp) != JB_ERR_OK)
1558 /* decide how to route the HTTP request */
1559 fwd = forward_url(csp, http);
1562 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1563 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1568 * build the http request to send to the server
1569 * we have to do one of the following:
1571 * create = use the original HTTP request to create a new
1572 * HTTP request that has either the path component
1573 * without the http://domainspec (w/path) or the
1574 * full orininal URL (w/url)
1575 * Note that the path and/or the HTTP version may
1576 * have been altered by now.
1578 * connect = Open a socket to the host:port of the server
1579 * and short-circuit server and client socket.
1581 * pass = Pass the request unchanged if forwarding a CONNECT
1582 * request to a parent proxy. Note that we'll be sending
1583 * the CFAIL message ourselves if connecting to the parent
1584 * fails, but we won't send a CSUCCEED message if it works,
1585 * since that would result in a double message (ours and the
1586 * parent's). After sending the request to the parent, we simply
1589 * here's the matrix:
1592 * +--------+--------+
1594 * 0 | create | connect|
1596 * Forwarding +--------+--------+
1598 * 1 | create | pass |
1600 * +--------+--------+
1604 if (http->ssl && connect_port_is_forbidden(csp))
1606 const char *acceptable_connect_ports =
1607 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
1608 assert(NULL != acceptable_connect_ports);
1609 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
1610 "limit-connect{%s} doesn't allow CONNECT requests to %s",
1611 csp->ip_addr_str, acceptable_connect_ports, csp->http->hostport);
1612 csp->action->flags |= ACTION_BLOCK;
1618 freez(csp->headers->first->str);
1619 build_request_line(csp, fwd, &csp->headers->first->str);
1623 * We have a request. Check if one of the crunchers wants it.
1625 if (crunch_response_triggered(csp, crunchers_all))
1628 * Yes. The client got the crunch response and we're done here.
1633 log_applied_actions(csp->action);
1634 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1636 if (fwd->forward_host)
1638 log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
1639 fwd->forward_host, fwd->forward_port, http->hostport);
1643 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1646 /* here we connect to the server, gateway, or the forwarder */
1648 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1649 if ((csp->server_connection.sfd != JB_INVALID_SOCKET)
1650 && socket_is_still_alive(csp->server_connection.sfd)
1651 && connection_destination_matches(&csp->server_connection, http, fwd))
1653 log_error(LOG_LEVEL_CONNECT,
1654 "Reusing server socket %u. Opened for %s.",
1655 csp->server_connection.sfd, csp->server_connection.host);
1659 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
1661 log_error(LOG_LEVEL_CONNECT,
1662 "Closing server socket %u. Opened for %s.",
1663 csp->server_connection.sfd, csp->server_connection.host);
1664 close_socket(csp->server_connection.sfd);
1665 mark_connection_closed(&csp->server_connection);
1667 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1669 csp->server_connection.sfd = forwarded_connect(fwd, http, csp);
1671 if (csp->server_connection.sfd == JB_INVALID_SOCKET)
1673 if (fwd->type != SOCKS_NONE)
1676 rsp = error_response(csp, "forwarding-failed");
1678 else if (errno == EINVAL)
1680 rsp = error_response(csp, "no-such-domain");
1684 rsp = error_response(csp, "connect-failed");
1687 /* Write the answer to the client */
1690 send_crunch_response(csp, rsp);
1695 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1696 save_connection_destination(csp->server_connection.sfd,
1697 http, fwd, &csp->server_connection);
1698 csp->server_connection.keep_alive_timeout =
1699 (unsigned)csp->config->keep_alive_timeout;
1701 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1703 if (fwd->forward_host || (http->ssl == 0))
1705 hdr = list_to_text(csp->headers);
1708 /* FIXME Should handle error properly */
1709 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1711 list_remove_all(csp->headers);
1714 * Write the client's (modified) header to the server
1715 * (along with anything else that may be in the buffer)
1717 if (write_socket(csp->server_connection.sfd, hdr, strlen(hdr))
1718 || (flush_socket(csp->server_connection.sfd, csp->iob) < 0))
1720 log_error(LOG_LEVEL_CONNECT,
1721 "write header to: %s failed: %E", http->hostport);
1723 rsp = error_response(csp, "connect-failed");
1726 send_crunch_response(csp, rsp);
1737 * We're running an SSL tunnel and we're not forwarding,
1738 * so just ditch the client headers, send the "connect succeeded"
1739 * message to the client, flush the rest, and get out of the way.
1741 list_remove_all(csp->headers);
1742 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
1749 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
1751 csp->server_connection.request_sent = time(NULL);
1753 maxfd = (csp->cfd > csp->server_connection.sfd) ?
1754 csp->cfd : csp->server_connection.sfd;
1756 /* pass data between the client and server
1757 * until one or the other shuts down the connection.
1766 * FD_ZERO here seems to point to an errant macro which crashes.
1767 * So do this by hand for now...
1769 memset(&rfds,0x00,sizeof(fd_set));
1773 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1774 if (!watch_client_socket)
1776 maxfd = csp->server_connection.sfd;
1779 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1781 FD_SET(csp->cfd, &rfds);
1784 FD_SET(csp->server_connection.sfd, &rfds);
1786 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1787 if ((csp->flags & CSP_FLAG_CHUNKED)
1788 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
1789 && ((csp->iob->eod - csp->iob->cur) >= 5)
1790 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
1793 * XXX: This check should be obsolete now,
1794 * but let's wait a while to be sure.
1796 log_error(LOG_LEVEL_CONNECT,
1797 "Looks like we got the last chunk together with "
1798 "the server headers but didn't detect it earlier. "
1799 "We better stop reading.");
1800 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
1801 csp->expected_content_length = byte_count;
1802 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
1804 if (server_body && server_response_is_complete(csp, byte_count))
1806 if (csp->expected_content_length == byte_count)
1808 log_error(LOG_LEVEL_CONNECT,
1809 "Done reading from server. Content length: %llu as expected. "
1810 "Bytes most recently read: %d.",
1815 log_error(LOG_LEVEL_CONNECT,
1816 "Done reading from server. Expected content length: %llu. "
1817 "Actual content length: %llu. Bytes most recently read: %d.",
1818 csp->expected_content_length, byte_count, len);
1822 * XXX: should not jump around,
1823 * chat() is complicated enough already.
1827 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1829 timeout.tv_sec = csp->config->socket_timeout;
1830 timeout.tv_usec = 0;
1831 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
1835 log_error(LOG_LEVEL_ERROR,
1836 "Didn't receive data in time: %s", http->url);
1837 if ((byte_count == 0) && (http->ssl == 0))
1839 send_crunch_response(csp, error_response(csp, "connection-timeout"));
1841 mark_server_socket_tainted(csp);
1846 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1847 mark_server_socket_tainted(csp);
1852 * This is the body of the browser's request,
1853 * just read and write it.
1855 * XXX: Make sure the client doesn't use pipelining
1856 * behind Privoxy's back.
1858 if (FD_ISSET(csp->cfd, &rfds))
1860 int max_bytes_to_read = sizeof(buf) - 1;
1862 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1863 if ((csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
1865 if (data_is_available(csp->cfd, 0))
1868 * If the next request is already waiting, we have
1869 * to stop select()ing the client socket. Otherwise
1870 * we would always return right away and get nothing
1873 watch_client_socket = 0;
1874 log_error(LOG_LEVEL_CONNECT,
1875 "Stopping to watch the client socket %d. "
1876 "There's already another request waiting.",
1881 * If the client socket is set, but there's no data
1882 * available on the socket, the client went fishing
1883 * and continuing talking to the server makes no sense.
1885 log_error(LOG_LEVEL_CONNECT,
1886 "The client closed socket %d while "
1887 "the server socket %d is still open.",
1888 csp->cfd, csp->server_connection.sfd);
1889 mark_server_socket_tainted(csp);
1892 if (csp->expected_client_content_length != 0)
1894 if (csp->expected_client_content_length < (sizeof(buf) - 1))
1896 max_bytes_to_read = (int)csp->expected_client_content_length;
1898 log_error(LOG_LEVEL_CONNECT,
1899 "Waiting for up to %d bytes from the client.",
1902 assert(max_bytes_to_read < sizeof(buf));
1903 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1905 len = read_socket(csp->cfd, buf, max_bytes_to_read);
1909 /* XXX: not sure if this is necessary. */
1910 mark_server_socket_tainted(csp);
1911 break; /* "game over, man" */
1914 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1915 if (csp->expected_client_content_length != 0)
1917 assert(len <= max_bytes_to_read);
1918 csp->expected_client_content_length -= (unsigned)len;
1919 log_error(LOG_LEVEL_CONNECT,
1920 "Expected client content length set to %llu "
1921 "after reading %d bytes.",
1922 csp->expected_client_content_length, len);
1923 if (csp->expected_client_content_length == 0)
1925 log_error(LOG_LEVEL_CONNECT,
1926 "Done reading from the client.");
1927 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1930 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1932 if (write_socket(csp->server_connection.sfd, buf, (size_t)len))
1934 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1935 mark_server_socket_tainted(csp);
1942 * The server wants to talk. It could be the header or the body.
1943 * If `hdr' is null, then it's the header otherwise it's the body.
1944 * FIXME: Does `hdr' really mean `host'? No.
1946 if (FD_ISSET(csp->server_connection.sfd, &rfds))
1948 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1950 * If we are buffering content, we don't want to eat up to
1951 * buffer-limit bytes if the client no longer cares about them.
1952 * If we aren't buffering, however, a dead client socket will be
1953 * noticed pretty much right away anyway, so we can reduce the
1954 * overhead by skipping the check.
1956 if (buffer_and_filter_content && !socket_is_still_alive(csp->cfd))
1959 log_error(LOG_LEVEL_CONNECT,
1960 "The server still wants to talk, but the client may already have hung up on us.");
1962 log_error(LOG_LEVEL_CONNECT,
1963 "The server still wants to talk, but the client hung up on us.");
1964 mark_server_socket_tainted(csp);
1966 #endif /* def _WIN32 */
1968 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1971 len = read_socket(csp->server_connection.sfd, buf, sizeof(buf) - 1);
1975 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1977 if (http->ssl && (fwd->forward_host == NULL))
1980 * Just hang up. We already confirmed the client's CONNECT
1981 * request with status code 200 and unencrypted content is
1982 * no longer welcome.
1984 log_error(LOG_LEVEL_ERROR,
1985 "CONNECT already confirmed. Unable to tell the client about the problem.");
1988 else if (byte_count)
1991 * Just hang up. We already transmitted the original headers
1992 * and parts of the original content and therefore missed the
1993 * chance to send an error message (without risking data corruption).
1995 * XXX: we could retry with a fancy range request here.
1997 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
1998 "Unable to tell the client about the problem.");
1999 mark_server_socket_tainted(csp);
2003 * XXX: Consider handling the cases above the same.
2005 mark_server_socket_tainted(csp);
2009 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2010 if (csp->flags & CSP_FLAG_CHUNKED)
2012 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2014 /* XXX: this is a temporary hack */
2015 log_error(LOG_LEVEL_CONNECT,
2016 "Looks like we reached the end of the last chunk. "
2017 "We better stop reading.");
2018 csp->expected_content_length = byte_count + (unsigned long long)len;
2019 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2023 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2026 * Add a trailing zero to let be able to use string operations.
2027 * XXX: do we still need this with filter_popups gone?
2032 * Normally, this would indicate that we've read
2033 * as much as the server has sent us and we can
2034 * close the client connection. However, Microsoft
2035 * in its wisdom has released IIS/5 with a bug that
2036 * prevents it from sending the trailing \r\n in
2037 * a 302 redirect header (and possibly other headers).
2038 * To work around this if we've haven't parsed
2039 * a full header we'll append a trailing \r\n
2040 * and see if this now generates a valid one.
2042 * This hack shouldn't have any impacts. If we've
2043 * already transmitted the header or if this is a
2044 * SSL connection, then we won't bother with this
2045 * hack. So we only work on partially received
2046 * headers. If we append a \r\n and this still
2047 * doesn't generate a valid header, then we won't
2048 * transmit anything to the client.
2053 if (server_body || http->ssl)
2056 * If we have been buffering up the document,
2057 * now is the time to apply content modification
2058 * and send the result to the client.
2060 if (buffer_and_filter_content)
2062 p = execute_content_filters(csp);
2064 * If content filtering fails, use the original
2065 * buffer and length.
2066 * (see p != NULL ? p : csp->iob->cur below)
2070 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2072 #ifdef FEATURE_COMPRESSION
2073 else if ((csp->flags & CSP_FLAG_CLIENT_SUPPORTS_DEFLATE)
2074 && (csp->content_length > LOWER_LENGTH_LIMIT_FOR_COMPRESSION))
2076 char *compressed_content = compress_buffer(p,
2077 (size_t *)&csp->content_length, csp->config->compression_level);
2078 if (compressed_content != NULL)
2081 p = compressed_content;
2082 csp->flags |= CSP_FLAG_BUFFERED_CONTENT_DEFLATED;
2087 if (JB_ERR_OK != update_server_headers(csp))
2089 log_error(LOG_LEVEL_FATAL,
2090 "Failed to update server headers. after filtering.");
2093 hdr = list_to_text(csp->headers);
2096 /* FIXME Should handle error properly */
2097 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2100 if (write_socket(csp->cfd, hdr, strlen(hdr))
2101 || write_socket(csp->cfd,
2102 ((p != NULL) ? p : csp->iob->cur), (size_t)csp->content_length))
2104 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2107 mark_server_socket_tainted(csp);
2115 break; /* "game over, man" */
2119 * This is NOT the body, so
2120 * Let's pretend the server just sent us a blank line.
2122 snprintf(buf, sizeof(buf), "\r\n");
2123 len = (int)strlen(buf);
2126 * Now, let the normal header parsing algorithm below do its
2127 * job. If it fails, we'll exit instead of continuing.
2134 * If this is an SSL connection or we're in the body
2135 * of the server document, just write it to the client,
2136 * unless we need to buffer the body for later content-filtering
2138 if (server_body || http->ssl)
2140 if (buffer_and_filter_content)
2143 * If there is no memory left for buffering the content, or the buffer limit
2144 * has been reached, switch to non-filtering mode, i.e. make & write the
2145 * header, flush the iob and buf, and get out of the way.
2147 if (add_to_iob(csp, buf, len))
2152 log_error(LOG_LEVEL_INFO,
2153 "Flushing header and buffers. Stepping back from filtering.");
2155 hdr = list_to_text(csp->headers);
2159 * Memory is too tight to even generate the header.
2160 * Send our static "Out-of-memory" page.
2162 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2163 rsp = cgi_error_memory();
2164 send_crunch_response(csp, rsp);
2165 mark_server_socket_tainted(csp);
2168 hdrlen = strlen(hdr);
2170 if (write_socket(csp->cfd, hdr, hdrlen)
2171 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2172 || (write_socket(csp->cfd, buf, (size_t)len)))
2174 log_error(LOG_LEVEL_CONNECT,
2175 "Flush header and buffers to client failed: %E");
2177 mark_server_socket_tainted(csp);
2182 * Reset the byte_count to the amount of bytes
2183 * we just flushed. len will be added a few lines below,
2184 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2186 byte_count = (unsigned long long)flushed;
2188 buffer_and_filter_content = 0;
2194 if (write_socket(csp->cfd, buf, (size_t)len))
2196 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2197 mark_server_socket_tainted(csp);
2201 byte_count += (unsigned long long)len;
2207 * We're still looking for the end of the server's header.
2208 * Buffer up the data we just read. If that fails, there's
2209 * little we can do but send our static out-of-memory page.
2211 if (add_to_iob(csp, buf, len))
2213 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2214 rsp = cgi_error_memory();
2215 send_crunch_response(csp, rsp);
2216 mark_server_socket_tainted(csp);
2220 /* Convert iob into something sed() can digest */
2221 if (JB_ERR_PARSE == get_server_headers(csp))
2226 * Well, we tried our MS IIS/5 hack and it didn't work.
2227 * The header is incomplete and there isn't anything
2228 * we can do about it.
2230 log_error(LOG_LEVEL_ERROR, "Invalid server headers. "
2231 "Applying the MS IIS5 hack didn't help.");
2232 log_error(LOG_LEVEL_CLF,
2233 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2234 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2235 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2236 mark_server_socket_tainted(csp);
2242 * Since we have to wait for more from the server before
2243 * we can parse the headers we just continue here.
2245 log_error(LOG_LEVEL_CONNECT,
2246 "Continuing buffering headers. Bytes most recently read: %d.",
2254 * Account for the content bytes we
2255 * might have gotten with the headers.
2257 assert(csp->iob->eod >= csp->iob->cur);
2258 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
2261 /* Did we actually get anything? */
2262 if (NULL == csp->headers->first)
2264 if ((csp->flags & CSP_FLAG_REUSED_CLIENT_CONNECTION))
2266 log_error(LOG_LEVEL_ERROR,
2267 "No server or forwarder response received on socket %d. "
2268 "Closing client socket %d without sending data.",
2269 csp->server_connection.sfd, csp->cfd);
2270 log_error(LOG_LEVEL_CLF,
2271 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2275 log_error(LOG_LEVEL_ERROR,
2276 "No server or forwarder response received on socket %d.",
2277 csp->server_connection.sfd);
2278 send_crunch_response(csp, error_response(csp, "no-server-data"));
2280 free_http_request(http);
2281 mark_server_socket_tainted(csp);
2285 assert(csp->headers->first->str);
2287 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
2288 strncmpic(csp->headers->first->str, "ICY", 3))
2291 * It doesn't look like a HTTP (or Shoutcast) response:
2292 * tell the client and log the problem.
2294 if (strlen(csp->headers->first->str) > 30)
2296 csp->headers->first->str[30] = '\0';
2298 log_error(LOG_LEVEL_ERROR,
2299 "Invalid server or forwarder response. Starts with: %s",
2300 csp->headers->first->str);
2301 log_error(LOG_LEVEL_CLF,
2302 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2303 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2304 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2305 free_http_request(http);
2306 mark_server_socket_tainted(csp);
2311 * We have now received the entire server header,
2312 * filter it and send the result to the client
2314 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
2316 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2318 hdr = list_to_text(csp->headers);
2321 /* FIXME Should handle error properly */
2322 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2325 if ((csp->flags & CSP_FLAG_CHUNKED)
2326 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2327 && ((csp->iob->eod - csp->iob->cur) >= 5)
2328 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
2330 log_error(LOG_LEVEL_CONNECT,
2331 "Looks like we got the last chunk together with "
2332 "the server headers. We better stop reading.");
2333 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
2334 csp->expected_content_length = byte_count;
2335 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2338 csp->server_connection.response_received = time(NULL);
2340 if (crunch_response_triggered(csp, crunchers_light))
2343 * One of the tags created by a server-header
2344 * tagger triggered a crunch. We already
2345 * delivered the crunch response to the client
2346 * and are done here after cleaning up.
2349 mark_server_socket_tainted(csp);
2352 /* Buffer and pcrs filter this if appropriate. */
2354 if (!http->ssl) /* We talk plaintext */
2356 buffer_and_filter_content = content_requires_filtering(csp);
2359 * Only write if we're not buffering for content modification
2361 if (!buffer_and_filter_content)
2364 * Write the server's (modified) header to
2365 * the client (along with anything else that
2366 * may be in the buffer)
2369 if (write_socket(csp->cfd, hdr, strlen(hdr))
2370 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
2372 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2375 * The write failed, so don't bother mentioning it
2376 * to the client... it probably can't hear us anyway.
2379 mark_server_socket_tainted(csp);
2384 /* we're finished with the server's header */
2390 * If this was a MS IIS/5 hack then it means the server
2391 * has already closed the connection. Nothing more to read.
2396 log_error(LOG_LEVEL_ERROR,
2397 "Closed server connection detected. "
2398 "Applying the MS IIS5 hack didn't help.");
2399 log_error(LOG_LEVEL_CLF,
2400 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2401 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2402 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2403 mark_server_socket_tainted(csp);
2409 mark_server_socket_tainted(csp);
2410 return; /* huh? we should never get here */
2413 if (csp->content_length == 0)
2416 * If Privoxy didn't recalculate the Content-Length,
2417 * byte_count is still correct.
2419 csp->content_length = byte_count;
2422 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2423 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2424 && (csp->expected_content_length != byte_count))
2426 log_error(LOG_LEVEL_CONNECT,
2427 "Received %llu bytes while expecting %llu.",
2428 byte_count, csp->expected_content_length);
2429 mark_server_socket_tainted(csp);
2433 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
2434 csp->ip_addr_str, http->ocmd, csp->content_length);
2436 csp->server_connection.timestamp = time(NULL);
2440 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2441 /*********************************************************************
2443 * Function : prepare_csp_for_next_request
2445 * Description : Put the csp in a mostly vergin state.
2448 * 1 : csp = Current client state (buffers, headers, etc...)
2452 *********************************************************************/
2453 static void prepare_csp_for_next_request(struct client_state *csp)
2455 unsigned int toggled_on_flag_set = (0 != (csp->flags & CSP_FLAG_TOGGLED_ON));
2457 csp->content_type = 0;
2458 csp->content_length = 0;
2459 csp->expected_content_length = 0;
2460 csp->expected_client_content_length = 0;
2461 list_remove_all(csp->headers);
2462 freez(csp->iob->buf);
2463 memset(csp->iob, 0, sizeof(csp->iob));
2464 freez(csp->error_message);
2465 free_http_request(csp->http);
2466 destroy_list(csp->headers);
2467 destroy_list(csp->tags);
2468 free_current_action(csp->action);
2469 if (NULL != csp->fwd)
2471 unload_forward_spec(csp->fwd);
2474 /* XXX: Store per-connection flags someplace else. */
2475 csp->flags = (CSP_FLAG_ACTIVE | CSP_FLAG_REUSED_CLIENT_CONNECTION);
2476 if (toggled_on_flag_set)
2478 csp->flags |= CSP_FLAG_TOGGLED_ON;
2481 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2484 /*********************************************************************
2488 * Description : This is little more than chat. We only "serve" to
2489 * to close (or remember) any socket that chat may have
2493 * 1 : csp = Current client state (buffers, headers, etc...)
2497 *********************************************************************/
2499 void serve(struct client_state *csp)
2500 #else /* ifndef AMIGA */
2501 static void serve(struct client_state *csp)
2502 #endif /* def AMIGA */
2504 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2505 #ifdef FEATURE_CONNECTION_SHARING
2506 static int monitor_thread_running = 0;
2507 #endif /* def FEATURE_CONNECTION_SHARING */
2508 int continue_chatting = 0;
2510 log_error(LOG_LEVEL_CONNECT, "Accepted connection from %s on socket %d",
2511 csp->ip_addr_str, csp->cfd);
2515 unsigned int latency;
2516 int config_file_change_detected = 0; /* Only used for debugging */
2521 * If the request has been crunched,
2522 * the calculated latency is zero.
2524 latency = (unsigned)(csp->server_connection.response_received -
2525 csp->server_connection.request_sent) / 2;
2527 continue_chatting = (csp->config->feature_flags
2528 & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
2529 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
2530 && ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
2531 || (csp->flags & CSP_FLAG_CRUNCHED))
2532 && (csp->cfd != JB_INVALID_SOCKET)
2533 && ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
2534 || (csp->config->feature_flags &
2535 RUNTIME_FEATURE_CONNECTION_SHARING));
2537 if (continue_chatting && !(csp->flags & CSP_FLAG_CRUNCHED))
2539 continue_chatting = (csp->server_connection.sfd != JB_INVALID_SOCKET)
2540 && socket_is_still_alive(csp->server_connection.sfd);
2541 if (continue_chatting)
2543 if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
2545 csp->server_connection.keep_alive_timeout = csp->config->default_server_timeout;
2546 log_error(LOG_LEVEL_CONNECT,
2547 "The server didn't specify how long the connection will stay open. "
2548 "Assumed timeout is: %u.", csp->server_connection.keep_alive_timeout);
2550 continue_chatting = (latency < csp->server_connection.keep_alive_timeout);
2554 if (continue_chatting && any_loaded_file_changed(csp->config->config_file_list))
2556 continue_chatting = 0;
2557 config_file_change_detected = 1;
2560 if (continue_chatting)
2562 unsigned int client_timeout = 1; /* XXX: Use something else here? */
2564 if (0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE))
2566 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2568 client_timeout = (unsigned)csp->server_connection.keep_alive_timeout - latency;
2569 log_error(LOG_LEVEL_CONNECT,
2570 "Waiting for the next client request on socket %d. "
2571 "Keeping the server socket %d to %s open.",
2572 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
2576 log_error(LOG_LEVEL_CONNECT,
2577 "Waiting for the next client request on socket %d. "
2578 "No server socket to keep open.", csp->cfd);
2581 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
2582 && data_is_available(csp->cfd, (int)client_timeout)
2583 && socket_is_still_alive(csp->cfd))
2585 log_error(LOG_LEVEL_CONNECT,
2586 "Client request arrived in time on socket %d.", csp->cfd);
2587 prepare_csp_for_next_request(csp);
2591 if (0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE))
2593 log_error(LOG_LEVEL_CONNECT,
2594 "No additional client request received in time on socket %d.",
2597 #ifdef FEATURE_CONNECTION_SHARING
2598 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
2599 && (socket_is_still_alive(csp->server_connection.sfd)))
2601 time_t time_open = time(NULL) - csp->server_connection.timestamp;
2603 if (csp->server_connection.keep_alive_timeout < time_open - (time_t)latency)
2608 remember_connection(&csp->server_connection);
2609 csp->server_connection.sfd = JB_INVALID_SOCKET;
2610 close_socket(csp->cfd);
2611 csp->cfd = JB_INVALID_SOCKET;
2612 privoxy_mutex_lock(&connection_reuse_mutex);
2613 if (!monitor_thread_running)
2615 monitor_thread_running = 1;
2616 privoxy_mutex_unlock(&connection_reuse_mutex);
2617 wait_for_alive_connections();
2618 privoxy_mutex_lock(&connection_reuse_mutex);
2619 monitor_thread_running = 0;
2621 privoxy_mutex_unlock(&connection_reuse_mutex);
2623 #endif /* def FEATURE_CONNECTION_SHARING */
2627 else if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2629 log_error(LOG_LEVEL_CONNECT,
2630 "The connection on server socket %d to %s isn't reusable. Closing. "
2631 "Server connection: keep-alive %u, tainted: %u, socket alive %u. "
2632 "Client connection: socket alive: %u. Server timeout: %u. "
2633 "Configuration file change detected: %u",
2634 csp->server_connection.sfd, csp->server_connection.host,
2635 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
2636 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
2637 socket_is_still_alive(csp->server_connection.sfd),
2638 socket_is_still_alive(csp->cfd),
2639 csp->server_connection.keep_alive_timeout,
2640 config_file_change_detected);
2642 } while (continue_chatting);
2646 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2648 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2650 #ifdef FEATURE_CONNECTION_SHARING
2651 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
2653 forget_connection(csp->server_connection.sfd);
2655 #endif /* def FEATURE_CONNECTION_SHARING */
2656 close_socket(csp->server_connection.sfd);
2659 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2660 mark_connection_closed(&csp->server_connection);
2663 if (csp->cfd != JB_INVALID_SOCKET)
2665 log_error(LOG_LEVEL_CONNECT, "Closing client socket %d. "
2666 "Keep-alive: %u, Socket alive: %u. Data available: %u.",
2667 csp->cfd, 0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE),
2668 socket_is_still_alive(csp->cfd), data_is_available(csp->cfd, 0));
2669 close_socket(csp->cfd);
2672 csp->flags &= ~CSP_FLAG_ACTIVE;
2678 /*********************************************************************
2680 * Function : server_thread
2682 * Description : We only exist to call `serve' in a threaded environment.
2685 * 1 : data = Current client state (buffers, headers, etc...)
2687 * Returns : Always 0.
2689 *********************************************************************/
2690 static int32 server_thread(void *data)
2692 serve((struct client_state *) data);
2699 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2700 /*********************************************************************
2704 * Description : Print usage info & exit.
2706 * Parameters : Pointer to argv[0] for identifying ourselves
2710 *********************************************************************/
2711 static void usage(const char *myname)
2713 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2717 #endif /* defined(unix) */
2720 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
2721 #endif /* defined(unix) */
2722 "[--version] [configfile]\n"
2723 "Aborting\n", myname);
2728 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
2731 #ifdef MUTEX_LOCKS_AVAILABLE
2732 /*********************************************************************
2734 * Function : privoxy_mutex_lock
2736 * Description : Locks a mutex.
2739 * 1 : mutex = The mutex to lock.
2741 * Returns : Void. May exit in case of errors.
2743 *********************************************************************/
2744 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
2746 #ifdef FEATURE_PTHREAD
2747 int err = pthread_mutex_lock(mutex);
2750 if (mutex != &log_mutex)
2752 log_error(LOG_LEVEL_FATAL,
2753 "Mutex locking failed: %s.\n", strerror(err));
2758 EnterCriticalSection(mutex);
2759 #endif /* def FEATURE_PTHREAD */
2763 /*********************************************************************
2765 * Function : privoxy_mutex_unlock
2767 * Description : Unlocks a mutex.
2770 * 1 : mutex = The mutex to unlock.
2772 * Returns : Void. May exit in case of errors.
2774 *********************************************************************/
2775 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
2777 #ifdef FEATURE_PTHREAD
2778 int err = pthread_mutex_unlock(mutex);
2781 if (mutex != &log_mutex)
2783 log_error(LOG_LEVEL_FATAL,
2784 "Mutex unlocking failed: %s.\n", strerror(err));
2789 LeaveCriticalSection(mutex);
2790 #endif /* def FEATURE_PTHREAD */
2794 /*********************************************************************
2796 * Function : privoxy_mutex_init
2798 * Description : Prepares a mutex.
2801 * 1 : mutex = The mutex to initialize.
2803 * Returns : Void. May exit in case of errors.
2805 *********************************************************************/
2806 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
2808 #ifdef FEATURE_PTHREAD
2809 int err = pthread_mutex_init(mutex, 0);
2812 printf("Fatal error. Mutex initialization failed: %s.\n",
2817 InitializeCriticalSection(mutex);
2818 #endif /* def FEATURE_PTHREAD */
2820 #endif /* def MUTEX_LOCKS_AVAILABLE */
2822 /*********************************************************************
2824 * Function : initialize_mutexes
2826 * Description : Prepares mutexes if mutex support is available.
2830 * Returns : Void, exits in case of errors.
2832 *********************************************************************/
2833 static void initialize_mutexes(void)
2835 #ifdef MUTEX_LOCKS_AVAILABLE
2837 * Prepare global mutex semaphores
2839 privoxy_mutex_init(&log_mutex);
2840 privoxy_mutex_init(&log_init_mutex);
2841 privoxy_mutex_init(&connection_reuse_mutex);
2844 * XXX: The assumptions below are a bit naive
2845 * and can cause locks that aren't necessary.
2847 * For example older FreeBSD versions (< 6.x?)
2848 * have no gethostbyname_r, but gethostbyname is
2851 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
2852 privoxy_mutex_init(&resolver_mutex);
2853 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
2855 * XXX: should we use a single mutex for
2856 * localtime() and gmtime() as well?
2858 #ifndef HAVE_GMTIME_R
2859 privoxy_mutex_init(&gmtime_mutex);
2860 #endif /* ndef HAVE_GMTIME_R */
2862 #ifndef HAVE_LOCALTIME_R
2863 privoxy_mutex_init(&localtime_mutex);
2864 #endif /* ndef HAVE_GMTIME_R */
2867 privoxy_mutex_init(&rand_mutex);
2868 #endif /* ndef HAVE_RANDOM */
2870 #endif /* def MUTEX_LOCKS_AVAILABLE */
2874 /*********************************************************************
2878 * Description : Load the config file and start the listen loop.
2879 * This function is a lot more *sane* with the `load_config'
2880 * and `listen_loop' functions; although it stills does
2881 * a *little* too much for my taste.
2884 * 1 : argc = Number of parameters (including $0).
2885 * 2 : argv = Array of (char *)'s to the parameters.
2887 * Returns : 1 if : can't open config file, unrecognized directive,
2888 * stats requested in multi-thread mode, can't open the
2889 * log file, can't open the jar file, listen port is invalid,
2890 * any load fails, and can't bind port.
2892 * Else main never returns, the process must be signaled
2893 * to terminate execution. Or, on Windows, use the
2894 * "File", "Exit" menu option.
2896 *********************************************************************/
2898 int real_main(int argc, char **argv)
2900 int main(int argc, char **argv)
2904 unsigned int random_seed;
2906 struct passwd *pw = NULL;
2907 struct group *grp = NULL;
2909 char *pre_chroot_nslookup_to_load_resolver = NULL;
2916 #if !defined(_WIN32)
2923 /* Prepare mutexes if supported and necessary. */
2924 initialize_mutexes();
2926 /* Enable logging until further notice. */
2930 * Parse the command line arguments
2932 * XXX: simply printing usage information in case of
2933 * invalid arguments isn't particularly user friendly.
2935 while (++argc_pos < argc)
2938 /* Check to see if the service must be installed or uninstalled */
2939 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2941 const char *pName = argv[argc_pos] + 9;
2944 exit((install_service(pName)) ? 0 : 1);
2946 else if (strncmp(argv[argc_pos], "--uninstall", 11) == 0)
2948 const char *pName = argv[argc_pos] + 11;
2951 exit((uninstall_service(pName)) ? 0 : 1);
2953 else if (strcmp(argv[argc_pos], "--service") == 0)
2955 bRunAsService = TRUE;
2956 w32_set_service_cwd();
2957 atexit(w32_service_exit_notify);
2960 #endif /* defined(_WIN32) */
2963 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2965 if (strcmp(argv[argc_pos], "--help") == 0)
2970 else if (strcmp(argv[argc_pos], "--version") == 0)
2972 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2978 else if (strcmp(argv[argc_pos], "--no-daemon") == 0)
2980 set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
2984 else if (strcmp(argv[argc_pos], "--pidfile") == 0)
2986 if (++argc_pos == argc) usage(argv[0]);
2987 pidfile = strdup_or_die(argv[argc_pos]);
2990 else if (strcmp(argv[argc_pos], "--user") == 0)
2995 if (++argc_pos == argc) usage(argv[argc_pos]);
2997 user_arg = strdup_or_die(argv[argc_pos]);
2998 group_name = strchr(user_arg, '.');
2999 if (NULL != group_name)
3001 /* Nul-terminate the user name */
3004 /* Skip the former delimiter to actually reach the group name */
3007 grp = getgrnam(group_name);
3010 log_error(LOG_LEVEL_FATAL, "Group '%s' not found.", group_name);
3013 pw = getpwnam(user_arg);
3016 log_error(LOG_LEVEL_FATAL, "User '%s' not found.", user_arg);
3022 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup") == 0)
3024 if (++argc_pos == argc) usage(argv[0]);
3025 pre_chroot_nslookup_to_load_resolver = strdup_or_die(argv[argc_pos]);
3028 else if (strcmp(argv[argc_pos], "--chroot") == 0)
3032 #endif /* defined(unix) */
3034 else if (argc_pos + 1 != argc)
3037 * This is neither the last command line
3038 * option, nor was it recognized before,
3039 * therefore it must be invalid.
3045 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3047 configfile = argv[argc_pos];
3050 } /* -END- while (more arguments) */
3052 show_version(Argv[0]);
3055 if (*configfile != '/')
3057 char cwd[BUFFER_SIZE];
3059 size_t abs_file_size;
3061 /* make config-filename absolute here */
3062 if (NULL == getcwd(cwd, sizeof(cwd)))
3064 perror("failed to get current working directory");
3068 basedir = strdup_or_die(cwd);
3070 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3071 abs_file = malloc_or_die(abs_file_size);
3072 strlcpy(abs_file, basedir, abs_file_size);
3073 strlcat(abs_file, "/", abs_file_size);
3074 strlcat(abs_file, configfile, abs_file_size);
3075 configfile = abs_file;
3077 #endif /* defined unix */
3081 clients->next = NULL;
3083 /* XXX: factor out initialising after the next stable release. */
3086 #elif defined(_WIN32)
3090 random_seed = (unsigned int)time(NULL);
3092 srandom(random_seed);
3095 #endif /* ifdef HAVE_RANDOM */
3098 * Unix signal handling
3100 * Catch the abort, interrupt and terminate signals for a graceful exit
3101 * Catch the hangup signal so the errlog can be reopened.
3102 * Ignore the broken pipe signals (FIXME: Why?)
3104 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3107 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP };
3109 for (idx = 0; idx < SZ(catched_signals); idx++)
3111 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3112 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3114 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3115 #endif /* ifdef sun */
3117 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3121 if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
3123 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for SIGPIPE: %E");
3127 #else /* ifdef _WIN32 */
3128 # ifdef _WIN_CONSOLE
3130 * We *are* in a windows console app.
3131 * Print a verbose messages about FAQ's and such
3133 printf("%s", win32_blurb);
3134 # endif /* def _WIN_CONSOLE */
3135 #endif /* def _WIN32 */
3138 /* Initialize the CGI subsystem */
3139 cgi_init_error_messages();
3142 * If runnig on unix and without the --nodaemon
3143 * option, become a daemon. I.e. fork, detach
3144 * from tty and get process group leadership
3153 if (pid < 0) /* error */
3158 else if (pid != 0) /* parent */
3163 * must check for errors
3164 * child died due to missing files aso
3167 wpid = waitpid(pid, &status, WNOHANG);
3179 * stderr (fd 2) will be closed later on,
3180 * when the config file has been parsed.
3186 * Reserve fd 0 and 1 to prevent abort() and friends
3187 * from sending stuff to the clients or servers.
3189 fd = open("/dev/null", O_RDONLY);
3192 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
3196 if (dup2(fd, 0) == -1)
3198 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 0: %E");
3202 fd = open("/dev/null", O_WRONLY);
3205 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
3209 if (dup2(fd, 1) == -1)
3211 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 1: %E");
3218 } /* -END- if (daemon_mode) */
3221 * As soon as we have written the PID file, we can switch
3222 * to the user and group ID indicated by the --user option
3228 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3230 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3234 if (setgroups(1, &grp->gr_gid))
3236 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
3239 else if (initgroups(pw->pw_name, pw->pw_gid))
3241 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
3247 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3249 /* Read the time zone file from /etc before doing chroot. */
3251 if (NULL != pre_chroot_nslookup_to_load_resolver
3252 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3254 /* Initialize resolver library. */
3255 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3257 if (chroot(pw->pw_dir) < 0)
3259 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3263 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3266 if (setuid(pw->pw_uid))
3268 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3272 char putenv_dummy[64];
3274 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3275 if (putenv(putenv_dummy) != 0)
3277 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3280 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3281 if (putenv(putenv_dummy) != 0)
3283 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3289 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3292 #endif /* defined unix */
3295 /* This will be FALSE unless the command line specified --service
3299 /* Yup, so now we must attempt to establish a connection
3300 * with the service dispatcher. This will only work if this
3301 * process was launched by the service control manager to
3302 * actually run as a service. If this isn't the case, i've
3303 * known it take around 30 seconds or so for the call to return.
3306 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3307 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3309 /* Service has run, and at this point is now being stopped, so just return */
3314 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3316 /* An error occurred. Usually it's because --service was wrongly specified
3317 * and we were unable to connect to the Service Control Dispatcher because
3318 * it wasn't expecting us and is therefore not listening.
3320 * For now, just continue below to call the listen_loop function.
3323 #endif /* def _WIN32 */
3333 /*********************************************************************
3335 * Function : bind_port_helper
3337 * Description : Bind the listen port. Handles logging, and aborts
3341 * 1 : haddr = Host addres to bind to. Use NULL to bind to
3343 * 2 : hport = Specifies port to bind to.
3345 * Returns : Port that was opened.
3347 *********************************************************************/
3348 static jb_socket bind_port_helper(const char *haddr, int hport)
3353 result = bind_port(haddr, hport, &bfd);
3357 const char *bind_address = (NULL != haddr) ? haddr : "INADDR_ANY";
3361 log_error(LOG_LEVEL_FATAL,
3362 "can't bind to %s:%d: There may be another Privoxy "
3363 "or some other proxy running on port %d",
3364 bind_address, hport, hport);
3367 log_error(LOG_LEVEL_FATAL,
3368 "can't bind to %s:%d: The hostname is not resolvable",
3369 bind_address, hport);
3372 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: %E",
3373 bind_address, hport);
3376 /* shouldn't get here */
3377 return JB_INVALID_SOCKET;
3382 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3387 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3395 /*********************************************************************
3397 * Function : bind_ports_helper
3399 * Description : Bind the listen ports. Handles logging, and aborts
3403 * 1 : config = Privoxy configuration. Specifies ports
3405 * 2 : sockets = Preallocated array of opened sockets
3406 * corresponding to specification in config.
3407 * All non-opened sockets will be set to
3408 * JB_INVALID_SOCKET.
3410 * Returns : Nothing. Inspect sockets argument.
3412 *********************************************************************/
3413 static void bind_ports_helper(struct configuration_spec * config,
3414 jb_socket sockets[])
3418 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
3420 if (config->hport[i])
3422 sockets[i] = bind_port_helper(config->haddr[i], config->hport[i]);
3426 sockets[i] = JB_INVALID_SOCKET;
3429 config->need_bind = 0;
3433 /*********************************************************************
3435 * Function : close_ports_helper
3437 * Description : Close listenings ports.
3440 * 1 : sockets = Array of opened and non-opened sockets to
3441 * close. All sockets will be set to
3442 * JB_INVALID_SOCKET.
3444 * Returns : Nothing.
3446 *********************************************************************/
3447 static void close_ports_helper(jb_socket sockets[])
3451 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
3453 if (JB_INVALID_SOCKET != sockets[i])
3455 close_socket(sockets[i]);
3457 sockets[i] = JB_INVALID_SOCKET;
3463 /* Without this simple workaround we get this compiler warning from _beginthread
3464 * warning C4028: formal parameter 1 different from declaration
3466 void w32_service_listen_loop(void *p)
3470 #endif /* def _WIN32 */
3473 /*********************************************************************
3475 * Function : listen_loop
3477 * Description : bind the listen port and enter a "FOREVER" listening loop.
3483 *********************************************************************/
3484 static void listen_loop(void)
3486 struct client_states *csp_list = NULL;
3487 struct client_state *csp = NULL;
3488 jb_socket bfds[MAX_LISTENING_SOCKETS];
3489 struct configuration_spec *config;
3490 unsigned int active_threads = 0;
3492 config = load_config();
3494 #ifdef FEATURE_CONNECTION_SHARING
3496 * XXX: Should be relocated once it no
3497 * longer needs to emit log messages.
3499 initialize_reusable_connections();
3500 #endif /* def FEATURE_CONNECTION_SHARING */
3502 bind_ports_helper(config, bfds);
3504 #ifdef FEATURE_GRACEFUL_TERMINATION
3505 while (!g_terminate)
3510 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3511 while (waitpid(-1, NULL, WNOHANG) > 0)
3513 /* zombie children */
3515 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3518 * Free data that was used by died threads
3520 active_threads = sweep();
3524 * Re-open the errlog after HUP signal
3526 if (received_hup_signal)
3528 if (NULL != config->logfile)
3530 init_error_log(Argv[0], config->logfile);
3532 received_hup_signal = 0;
3536 csp_list = (struct client_states *)zalloc(sizeof(*csp_list));
3537 if (NULL == csp_list)
3539 log_error(LOG_LEVEL_FATAL,
3540 "malloc(%d) for csp_list failed: %E", sizeof(*csp_list));
3543 csp = &csp_list->csp;
3545 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3547 if (!accept_connection(csp, bfds))
3549 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3561 csp->flags |= CSP_FLAG_ACTIVE;
3562 csp->server_connection.sfd = JB_INVALID_SOCKET;
3564 csp->config = config = load_config();
3566 if (config->need_bind)
3569 * Since we were listening to the "old port", we will not see
3570 * a "listen" param change until the next request. So, at
3571 * least 1 more request must be made for us to find the new
3572 * setting. I am simply closing the old socket and binding the
3575 * Which-ever is correct, we will serve 1 more page via the
3576 * old settings. This should probably be a "show-proxy-args"
3577 * request. This should not be a so common of an operation
3578 * that this will hurt people's feelings.
3581 close_ports_helper(bfds);
3583 bind_ports_helper(config, bfds);
3586 #ifdef FEATURE_TOGGLE
3587 if (global_toggle_state)
3588 #endif /* def FEATURE_TOGGLE */
3590 csp->flags |= CSP_FLAG_TOGGLED_ON;
3593 if (run_loader(csp))
3595 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3596 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3600 if (block_acl(NULL,csp))
3602 log_error(LOG_LEVEL_CONNECT,
3603 "Connection from %s on socket %d dropped due to ACL", csp->ip_addr_str, csp->cfd);
3604 close_socket(csp->cfd);
3605 freez(csp->ip_addr_str);
3609 #endif /* def FEATURE_ACL */
3611 if ((0 != config->max_client_connections)
3612 && (active_threads >= config->max_client_connections))
3614 log_error(LOG_LEVEL_CONNECT,
3615 "Rejecting connection from %s. Maximum number of connections reached.",
3617 write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
3618 strlen(TOO_MANY_CONNECTIONS_RESPONSE));
3619 close_socket(csp->cfd);
3620 freez(csp->ip_addr_str);
3625 /* add it to the list of clients */
3626 csp_list->next = clients->next;
3627 clients->next = csp_list;
3629 if (config->multi_threaded)
3633 /* this is a switch () statement in the C preprocessor - ugh */
3634 #undef SELECTED_ONE_OPTION
3636 /* Use Pthreads in preference to native code */
3637 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3638 #define SELECTED_ONE_OPTION
3640 pthread_t the_thread;
3641 pthread_attr_t attrs;
3643 pthread_attr_init(&attrs);
3644 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3645 errno = pthread_create(&the_thread, &attrs,
3646 (void * (*)(void *))serve, csp);
3647 child_id = errno ? -1 : 0;
3648 pthread_attr_destroy(&attrs);
3652 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3653 #define SELECTED_ONE_OPTION
3654 child_id = _beginthread(
3655 (void (*)(void *))serve,
3660 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3661 #define SELECTED_ONE_OPTION
3662 child_id = _beginthread(
3663 (void(* _Optlink)(void*))serve,
3669 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3670 #define SELECTED_ONE_OPTION
3672 thread_id tid = spawn_thread
3673 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3675 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3677 child_id = (int) tid;
3686 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3687 #define SELECTED_ONE_OPTION
3688 csp->cfd = ReleaseSocket(csp->cfd, -1);
3691 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3692 NP_Output, Output(),
3693 NP_CloseOutput, FALSE,
3694 NP_Name, (ULONG)"privoxy child",
3698 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3699 NP_Output, Output(),
3700 NP_CloseOutput, FALSE,
3701 NP_Name, (ULONG)"privoxy child",
3702 NP_StackSize, 200*1024,
3708 ((struct Task *)child_id)->tc_UserData = csp;
3709 Signal((struct Task *)child_id, SIGF_SINGLE);
3714 #if !defined(SELECTED_ONE_OPTION)
3717 /* This block is only needed when using fork().
3718 * When using threads, the server thread was
3719 * created and run by the call to _beginthread().
3721 if (child_id == 0) /* child */
3724 #ifdef FEATURE_TOGGLE
3725 int inherited_toggle_state = global_toggle_state;
3726 #endif /* def FEATURE_TOGGLE */
3731 * If we've been toggled or we've blocked the request, tell Mom
3734 #ifdef FEATURE_TOGGLE
3735 if (inherited_toggle_state != global_toggle_state)
3737 rc |= RC_FLAG_TOGGLED;
3739 #endif /* def FEATURE_TOGGLE */
3741 #ifdef FEATURE_STATISTICS
3742 if (csp->flags & CSP_FLAG_REJECTED)
3744 rc |= RC_FLAG_BLOCKED;
3746 #endif /* ndef FEATURE_STATISTICS */
3750 else if (child_id > 0) /* parent */
3752 /* in a fork()'d environment, the parent's
3753 * copy of the client socket and the CSP
3757 #if !defined(_WIN32) && !defined(__CYGWIN__)
3759 wait(&child_status);
3762 * Evaluate child's return code: If the child has
3763 * - been toggled, toggle ourselves
3764 * - blocked its request, bump up the stats counter
3767 #ifdef FEATURE_TOGGLE
3768 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
3770 global_toggle_state = !global_toggle_state;
3772 #endif /* def FEATURE_TOGGLE */
3774 #ifdef FEATURE_STATISTICS
3776 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
3780 #endif /* def FEATURE_STATISTICS */
3782 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
3783 close_socket(csp->cfd);
3784 csp->flags &= ~CSP_FLAG_ACTIVE;
3788 #undef SELECTED_ONE_OPTION
3789 /* end of cpp switch () */
3794 * Spawning the child failed, assume it's because
3795 * there are too many children running already.
3796 * XXX: If you assume ...
3798 log_error(LOG_LEVEL_ERROR,
3799 "Unable to take any additional connections: %E");
3800 write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
3801 strlen(TOO_MANY_CONNECTIONS_RESPONSE));
3802 close_socket(csp->cfd);
3803 csp->flags &= ~CSP_FLAG_ACTIVE;
3812 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
3814 /* Clean up. Aim: free all memory (no leaks) */
3815 #ifdef FEATURE_GRACEFUL_TERMINATION
3817 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
3819 unload_current_config_file();
3820 unload_current_actions_file();
3821 unload_current_re_filterfile();
3822 #ifdef FEATURE_TRUST
3823 unload_current_trust_file();
3826 if (config->multi_threaded)
3833 } while ((clients->next != NULL) && (--i > 0));
3837 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
3847 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
3848 /* Cleanup - remove taskbar icon etc. */
3853 #endif /* FEATURE_GRACEFUL_TERMINATION */