1 const char jcc_rcs[] = "$Id: jcc.c,v 1.393 2012/10/21 12:39:27 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->client_iob->eod - csp->client_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->client_iob->eod > csp->client_iob->cur + csp->expected_client_content_length);
1097 csp->client_iob->eod = csp->client_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->client_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->client_iob->buf[0] = '\0';
1135 csp->client_iob->eod = csp->client_iob->cur = csp->client_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->client_iob, csp->config->buffer_limit, buf, len))
1233 request_line = get_header(csp->client_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->client_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->client_iob, csp->config->buffer_limit, 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))
1706 hdr = list_to_text(csp->headers);
1709 /* FIXME Should handle error properly */
1710 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1712 list_remove_all(csp->headers);
1715 * Write the client's (modified) header to the server
1716 * (along with anything else that may be in the buffer)
1718 write_failure = 0 != write_socket(csp->server_connection.sfd, hdr, strlen(hdr));
1723 log_error(LOG_LEVEL_CONNECT,
1724 "Failed sending request headers to: %s: %E", http->hostport);
1726 else if (flush_socket(csp->server_connection.sfd, csp->client_iob) < 0))
1729 log_error(LOG_LEVEL_CONNECT,
1730 "Failed sending request body to: %s: %E", http->hostport);
1735 rsp = error_response(csp, "connect-failed");
1738 send_crunch_response(csp, rsp);
1746 * We're running an SSL tunnel and we're not forwarding,
1747 * so just ditch the client headers, send the "connect succeeded"
1748 * message to the client, flush the rest, and get out of the way.
1750 list_remove_all(csp->headers);
1751 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
1755 IOB_RESET(csp->client_iob);
1758 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
1760 csp->server_connection.request_sent = time(NULL);
1762 maxfd = (csp->cfd > csp->server_connection.sfd) ?
1763 csp->cfd : csp->server_connection.sfd;
1765 /* pass data between the client and server
1766 * until one or the other shuts down the connection.
1775 * FD_ZERO here seems to point to an errant macro which crashes.
1776 * So do this by hand for now...
1778 memset(&rfds,0x00,sizeof(fd_set));
1782 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1783 if (!watch_client_socket)
1785 maxfd = csp->server_connection.sfd;
1788 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1790 FD_SET(csp->cfd, &rfds);
1793 FD_SET(csp->server_connection.sfd, &rfds);
1795 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1796 if ((csp->flags & CSP_FLAG_CHUNKED)
1797 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
1798 && ((csp->iob->eod - csp->iob->cur) >= 5)
1799 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
1802 * XXX: This check should be obsolete now,
1803 * but let's wait a while to be sure.
1805 log_error(LOG_LEVEL_CONNECT,
1806 "Looks like we got the last chunk together with "
1807 "the server headers but didn't detect it earlier. "
1808 "We better stop reading.");
1809 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
1810 csp->expected_content_length = byte_count;
1811 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
1813 if (server_body && server_response_is_complete(csp, byte_count))
1815 if (csp->expected_content_length == byte_count)
1817 log_error(LOG_LEVEL_CONNECT,
1818 "Done reading from server. Content length: %llu as expected. "
1819 "Bytes most recently read: %d.",
1824 log_error(LOG_LEVEL_CONNECT,
1825 "Done reading from server. Expected content length: %llu. "
1826 "Actual content length: %llu. Bytes most recently read: %d.",
1827 csp->expected_content_length, byte_count, len);
1831 * XXX: should not jump around,
1832 * chat() is complicated enough already.
1836 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1838 timeout.tv_sec = csp->config->socket_timeout;
1839 timeout.tv_usec = 0;
1840 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
1844 log_error(LOG_LEVEL_ERROR,
1845 "Didn't receive data in time: %s", http->url);
1846 if ((byte_count == 0) && (http->ssl == 0))
1848 send_crunch_response(csp, error_response(csp, "connection-timeout"));
1850 mark_server_socket_tainted(csp);
1855 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1856 mark_server_socket_tainted(csp);
1861 * This is the body of the browser's request,
1862 * just read and write it.
1864 * XXX: Make sure the client doesn't use pipelining
1865 * behind Privoxy's back.
1867 if (FD_ISSET(csp->cfd, &rfds))
1869 int max_bytes_to_read = sizeof(buf) - 1;
1871 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1872 if ((csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
1874 if (data_is_available(csp->cfd, 0))
1877 * If the next request is already waiting, we have
1878 * to stop select()ing the client socket. Otherwise
1879 * we would always return right away and get nothing
1882 watch_client_socket = 0;
1883 log_error(LOG_LEVEL_CONNECT,
1884 "Stopping to watch the client socket %d. "
1885 "There's already another request waiting.",
1890 * If the client socket is set, but there's no data
1891 * available on the socket, the client went fishing
1892 * and continuing talking to the server makes no sense.
1894 log_error(LOG_LEVEL_CONNECT,
1895 "The client closed socket %d while "
1896 "the server socket %d is still open.",
1897 csp->cfd, csp->server_connection.sfd);
1898 mark_server_socket_tainted(csp);
1901 if (csp->expected_client_content_length != 0)
1903 if (csp->expected_client_content_length < (sizeof(buf) - 1))
1905 max_bytes_to_read = (int)csp->expected_client_content_length;
1907 log_error(LOG_LEVEL_CONNECT,
1908 "Waiting for up to %d bytes from the client.",
1911 assert(max_bytes_to_read < sizeof(buf));
1912 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1914 len = read_socket(csp->cfd, buf, max_bytes_to_read);
1918 /* XXX: not sure if this is necessary. */
1919 mark_server_socket_tainted(csp);
1920 break; /* "game over, man" */
1923 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1924 if (csp->expected_client_content_length != 0)
1926 assert(len <= max_bytes_to_read);
1927 csp->expected_client_content_length -= (unsigned)len;
1928 log_error(LOG_LEVEL_CONNECT,
1929 "Expected client content length set to %llu "
1930 "after reading %d bytes.",
1931 csp->expected_client_content_length, len);
1932 if (csp->expected_client_content_length == 0)
1934 log_error(LOG_LEVEL_CONNECT,
1935 "Done reading from the client.");
1936 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1939 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1941 if (write_socket(csp->server_connection.sfd, buf, (size_t)len))
1943 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1944 mark_server_socket_tainted(csp);
1951 * The server wants to talk. It could be the header or the body.
1952 * If `hdr' is null, then it's the header otherwise it's the body.
1953 * FIXME: Does `hdr' really mean `host'? No.
1955 if (FD_ISSET(csp->server_connection.sfd, &rfds))
1957 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1959 * If we are buffering content, we don't want to eat up to
1960 * buffer-limit bytes if the client no longer cares about them.
1961 * If we aren't buffering, however, a dead client socket will be
1962 * noticed pretty much right away anyway, so we can reduce the
1963 * overhead by skipping the check.
1965 if (buffer_and_filter_content && !socket_is_still_alive(csp->cfd))
1968 log_error(LOG_LEVEL_CONNECT,
1969 "The server still wants to talk, but the client may already have hung up on us.");
1971 log_error(LOG_LEVEL_CONNECT,
1972 "The server still wants to talk, but the client hung up on us.");
1973 mark_server_socket_tainted(csp);
1975 #endif /* def _WIN32 */
1977 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1980 len = read_socket(csp->server_connection.sfd, buf, sizeof(buf) - 1);
1984 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1986 if (http->ssl && (fwd->forward_host == NULL))
1989 * Just hang up. We already confirmed the client's CONNECT
1990 * request with status code 200 and unencrypted content is
1991 * no longer welcome.
1993 log_error(LOG_LEVEL_ERROR,
1994 "CONNECT already confirmed. Unable to tell the client about the problem.");
1997 else if (byte_count)
2000 * Just hang up. We already transmitted the original headers
2001 * and parts of the original content and therefore missed the
2002 * chance to send an error message (without risking data corruption).
2004 * XXX: we could retry with a fancy range request here.
2006 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2007 "Unable to tell the client about the problem.");
2008 mark_server_socket_tainted(csp);
2012 * XXX: Consider handling the cases above the same.
2014 mark_server_socket_tainted(csp);
2018 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2019 if (csp->flags & CSP_FLAG_CHUNKED)
2021 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2023 /* XXX: this is a temporary hack */
2024 log_error(LOG_LEVEL_CONNECT,
2025 "Looks like we reached the end of the last chunk. "
2026 "We better stop reading.");
2027 csp->expected_content_length = byte_count + (unsigned long long)len;
2028 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2032 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2035 * Add a trailing zero to let be able to use string operations.
2036 * XXX: do we still need this with filter_popups gone?
2041 * Normally, this would indicate that we've read
2042 * as much as the server has sent us and we can
2043 * close the client connection. However, Microsoft
2044 * in its wisdom has released IIS/5 with a bug that
2045 * prevents it from sending the trailing \r\n in
2046 * a 302 redirect header (and possibly other headers).
2047 * To work around this if we've haven't parsed
2048 * a full header we'll append a trailing \r\n
2049 * and see if this now generates a valid one.
2051 * This hack shouldn't have any impacts. If we've
2052 * already transmitted the header or if this is a
2053 * SSL connection, then we won't bother with this
2054 * hack. So we only work on partially received
2055 * headers. If we append a \r\n and this still
2056 * doesn't generate a valid header, then we won't
2057 * transmit anything to the client.
2062 if (server_body || http->ssl)
2065 * If we have been buffering up the document,
2066 * now is the time to apply content modification
2067 * and send the result to the client.
2069 if (buffer_and_filter_content)
2071 p = execute_content_filters(csp);
2073 * If content filtering fails, use the original
2074 * buffer and length.
2075 * (see p != NULL ? p : csp->iob->cur below)
2079 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2081 #ifdef FEATURE_COMPRESSION
2082 else if ((csp->flags & CSP_FLAG_CLIENT_SUPPORTS_DEFLATE)
2083 && (csp->content_length > LOWER_LENGTH_LIMIT_FOR_COMPRESSION))
2085 char *compressed_content = compress_buffer(p,
2086 (size_t *)&csp->content_length, csp->config->compression_level);
2087 if (compressed_content != NULL)
2090 p = compressed_content;
2091 csp->flags |= CSP_FLAG_BUFFERED_CONTENT_DEFLATED;
2096 if (JB_ERR_OK != update_server_headers(csp))
2098 log_error(LOG_LEVEL_FATAL,
2099 "Failed to update server headers. after filtering.");
2102 hdr = list_to_text(csp->headers);
2105 /* FIXME Should handle error properly */
2106 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2109 if (write_socket(csp->cfd, hdr, strlen(hdr))
2110 || write_socket(csp->cfd,
2111 ((p != NULL) ? p : csp->iob->cur), (size_t)csp->content_length))
2113 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2116 mark_server_socket_tainted(csp);
2124 break; /* "game over, man" */
2128 * This is NOT the body, so
2129 * Let's pretend the server just sent us a blank line.
2131 snprintf(buf, sizeof(buf), "\r\n");
2132 len = (int)strlen(buf);
2135 * Now, let the normal header parsing algorithm below do its
2136 * job. If it fails, we'll exit instead of continuing.
2143 * If this is an SSL connection or we're in the body
2144 * of the server document, just write it to the client,
2145 * unless we need to buffer the body for later content-filtering
2147 if (server_body || http->ssl)
2149 if (buffer_and_filter_content)
2152 * If there is no memory left for buffering the content, or the buffer limit
2153 * has been reached, switch to non-filtering mode, i.e. make & write the
2154 * header, flush the iob and buf, and get out of the way.
2156 if (add_to_iob(csp->iob, csp->config->buffer_limit, buf, len))
2161 log_error(LOG_LEVEL_INFO,
2162 "Flushing header and buffers. Stepping back from filtering.");
2164 hdr = list_to_text(csp->headers);
2168 * Memory is too tight to even generate the header.
2169 * Send our static "Out-of-memory" page.
2171 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2172 rsp = cgi_error_memory();
2173 send_crunch_response(csp, rsp);
2174 mark_server_socket_tainted(csp);
2177 hdrlen = strlen(hdr);
2179 if (write_socket(csp->cfd, hdr, hdrlen)
2180 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2181 || (write_socket(csp->cfd, buf, (size_t)len)))
2183 log_error(LOG_LEVEL_CONNECT,
2184 "Flush header and buffers to client failed: %E");
2186 mark_server_socket_tainted(csp);
2191 * Reset the byte_count to the amount of bytes
2192 * we just flushed. len will be added a few lines below,
2193 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2195 byte_count = (unsigned long long)flushed;
2197 buffer_and_filter_content = 0;
2203 if (write_socket(csp->cfd, buf, (size_t)len))
2205 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2206 mark_server_socket_tainted(csp);
2210 byte_count += (unsigned long long)len;
2216 * We're still looking for the end of the server's header.
2217 * Buffer up the data we just read. If that fails, there's
2218 * little we can do but send our static out-of-memory page.
2220 if (add_to_iob(csp->iob, csp->config->buffer_limit, buf, len))
2222 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2223 rsp = cgi_error_memory();
2224 send_crunch_response(csp, rsp);
2225 mark_server_socket_tainted(csp);
2229 /* Convert iob into something sed() can digest */
2230 if (JB_ERR_PARSE == get_server_headers(csp))
2235 * Well, we tried our MS IIS/5 hack and it didn't work.
2236 * The header is incomplete and there isn't anything
2237 * we can do about it.
2239 log_error(LOG_LEVEL_ERROR, "Invalid server headers. "
2240 "Applying the MS IIS5 hack didn't help.");
2241 log_error(LOG_LEVEL_CLF,
2242 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2243 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2244 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2245 mark_server_socket_tainted(csp);
2251 * Since we have to wait for more from the server before
2252 * we can parse the headers we just continue here.
2254 log_error(LOG_LEVEL_CONNECT,
2255 "Continuing buffering server headers from socket %d. "
2256 "Bytes most recently read: %d.", csp->cfd, len);
2263 * Account for the content bytes we
2264 * might have gotten with the headers.
2266 assert(csp->iob->eod >= csp->iob->cur);
2267 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
2270 /* Did we actually get anything? */
2271 if (NULL == csp->headers->first)
2273 if ((csp->flags & CSP_FLAG_REUSED_CLIENT_CONNECTION))
2275 log_error(LOG_LEVEL_ERROR,
2276 "No server or forwarder response received on socket %d. "
2277 "Closing client socket %d without sending data.",
2278 csp->server_connection.sfd, csp->cfd);
2279 log_error(LOG_LEVEL_CLF,
2280 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2284 log_error(LOG_LEVEL_ERROR,
2285 "No server or forwarder response received on socket %d.",
2286 csp->server_connection.sfd);
2287 send_crunch_response(csp, error_response(csp, "no-server-data"));
2289 free_http_request(http);
2290 mark_server_socket_tainted(csp);
2294 assert(csp->headers->first->str);
2296 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
2297 strncmpic(csp->headers->first->str, "ICY", 3))
2300 * It doesn't look like a HTTP (or Shoutcast) response:
2301 * tell the client and log the problem.
2303 if (strlen(csp->headers->first->str) > 30)
2305 csp->headers->first->str[30] = '\0';
2307 log_error(LOG_LEVEL_ERROR,
2308 "Invalid server or forwarder response. Starts with: %s",
2309 csp->headers->first->str);
2310 log_error(LOG_LEVEL_CLF,
2311 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2312 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2313 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2314 free_http_request(http);
2315 mark_server_socket_tainted(csp);
2320 * We have now received the entire server header,
2321 * filter it and send the result to the client
2323 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
2325 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2327 hdr = list_to_text(csp->headers);
2330 /* FIXME Should handle error properly */
2331 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2334 if ((csp->flags & CSP_FLAG_CHUNKED)
2335 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2336 && ((csp->iob->eod - csp->iob->cur) >= 5)
2337 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
2339 log_error(LOG_LEVEL_CONNECT,
2340 "Looks like we got the last chunk together with "
2341 "the server headers. We better stop reading.");
2342 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
2343 csp->expected_content_length = byte_count;
2344 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2347 csp->server_connection.response_received = time(NULL);
2349 if (crunch_response_triggered(csp, crunchers_light))
2352 * One of the tags created by a server-header
2353 * tagger triggered a crunch. We already
2354 * delivered the crunch response to the client
2355 * and are done here after cleaning up.
2358 mark_server_socket_tainted(csp);
2361 /* Buffer and pcrs filter this if appropriate. */
2363 if (!http->ssl) /* We talk plaintext */
2365 buffer_and_filter_content = content_requires_filtering(csp);
2368 * Only write if we're not buffering for content modification
2370 if (!buffer_and_filter_content)
2373 * Write the server's (modified) header to
2374 * the client (along with anything else that
2375 * may be in the buffer)
2378 if (write_socket(csp->cfd, hdr, strlen(hdr))
2379 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
2381 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2384 * The write failed, so don't bother mentioning it
2385 * to the client... it probably can't hear us anyway.
2388 mark_server_socket_tainted(csp);
2393 /* we're finished with the server's header */
2399 * If this was a MS IIS/5 hack then it means the server
2400 * has already closed the connection. Nothing more to read.
2405 log_error(LOG_LEVEL_ERROR,
2406 "Closed server connection detected. "
2407 "Applying the MS IIS5 hack didn't help.");
2408 log_error(LOG_LEVEL_CLF,
2409 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2410 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2411 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2412 mark_server_socket_tainted(csp);
2418 mark_server_socket_tainted(csp);
2419 return; /* huh? we should never get here */
2422 if (csp->content_length == 0)
2425 * If Privoxy didn't recalculate the Content-Length,
2426 * byte_count is still correct.
2428 csp->content_length = byte_count;
2431 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2432 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2433 && (csp->expected_content_length != byte_count))
2435 log_error(LOG_LEVEL_CONNECT,
2436 "Received %llu bytes while expecting %llu.",
2437 byte_count, csp->expected_content_length);
2438 mark_server_socket_tainted(csp);
2442 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
2443 csp->ip_addr_str, http->ocmd, csp->content_length);
2445 csp->server_connection.timestamp = time(NULL);
2449 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2450 /*********************************************************************
2452 * Function : prepare_csp_for_next_request
2454 * Description : Put the csp in a mostly vergin state.
2457 * 1 : csp = Current client state (buffers, headers, etc...)
2461 *********************************************************************/
2462 static void prepare_csp_for_next_request(struct client_state *csp)
2464 unsigned int toggled_on_flag_set = (0 != (csp->flags & CSP_FLAG_TOGGLED_ON));
2466 csp->content_type = 0;
2467 csp->content_length = 0;
2468 csp->expected_content_length = 0;
2469 csp->expected_client_content_length = 0;
2470 list_remove_all(csp->headers);
2471 IOB_RESET(csp->iob);
2472 freez(csp->error_message);
2473 free_http_request(csp->http);
2474 destroy_list(csp->headers);
2475 destroy_list(csp->tags);
2476 free_current_action(csp->action);
2477 if (NULL != csp->fwd)
2479 unload_forward_spec(csp->fwd);
2482 /* XXX: Store per-connection flags someplace else. */
2483 csp->flags = (CSP_FLAG_ACTIVE | CSP_FLAG_REUSED_CLIENT_CONNECTION);
2484 if (toggled_on_flag_set)
2486 csp->flags |= CSP_FLAG_TOGGLED_ON;
2489 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2492 /*********************************************************************
2496 * Description : This is little more than chat. We only "serve" to
2497 * to close (or remember) any socket that chat may have
2501 * 1 : csp = Current client state (buffers, headers, etc...)
2505 *********************************************************************/
2507 void serve(struct client_state *csp)
2508 #else /* ifndef AMIGA */
2509 static void serve(struct client_state *csp)
2510 #endif /* def AMIGA */
2512 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2513 #ifdef FEATURE_CONNECTION_SHARING
2514 static int monitor_thread_running = 0;
2515 #endif /* def FEATURE_CONNECTION_SHARING */
2516 int continue_chatting = 0;
2518 log_error(LOG_LEVEL_CONNECT, "Accepted connection from %s on socket %d",
2519 csp->ip_addr_str, csp->cfd);
2523 unsigned int latency;
2524 int config_file_change_detected = 0; /* Only used for debugging */
2529 * If the request has been crunched,
2530 * the calculated latency is zero.
2532 latency = (unsigned)(csp->server_connection.response_received -
2533 csp->server_connection.request_sent) / 2;
2535 continue_chatting = (csp->config->feature_flags
2536 & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
2537 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
2538 && ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
2539 || (csp->flags & CSP_FLAG_CRUNCHED))
2540 && (csp->cfd != JB_INVALID_SOCKET)
2541 && ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
2542 || (csp->config->feature_flags &
2543 RUNTIME_FEATURE_CONNECTION_SHARING));
2545 if (continue_chatting && !(csp->flags & CSP_FLAG_CRUNCHED))
2547 continue_chatting = (csp->server_connection.sfd != JB_INVALID_SOCKET)
2548 && socket_is_still_alive(csp->server_connection.sfd);
2549 if (continue_chatting)
2551 if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
2553 csp->server_connection.keep_alive_timeout = csp->config->default_server_timeout;
2554 log_error(LOG_LEVEL_CONNECT,
2555 "The server didn't specify how long the connection will stay open. "
2556 "Assumed timeout is: %u.", csp->server_connection.keep_alive_timeout);
2558 continue_chatting = (latency < csp->server_connection.keep_alive_timeout);
2562 if (continue_chatting && any_loaded_file_changed(csp->config->config_file_list))
2564 continue_chatting = 0;
2565 config_file_change_detected = 1;
2568 if (continue_chatting)
2570 unsigned int client_timeout = 1; /* XXX: Use something else here? */
2572 if (0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE))
2574 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2576 client_timeout = (unsigned)csp->server_connection.keep_alive_timeout - latency;
2577 log_error(LOG_LEVEL_CONNECT,
2578 "Waiting for the next client request on socket %d. "
2579 "Keeping the server socket %d to %s open.",
2580 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
2584 log_error(LOG_LEVEL_CONNECT,
2585 "Waiting for the next client request on socket %d. "
2586 "No server socket to keep open.", csp->cfd);
2589 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
2590 && data_is_available(csp->cfd, (int)client_timeout)
2591 && socket_is_still_alive(csp->cfd))
2593 log_error(LOG_LEVEL_CONNECT,
2594 "Client request arrived in time on socket %d.", csp->cfd);
2595 prepare_csp_for_next_request(csp);
2599 if (0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE))
2601 log_error(LOG_LEVEL_CONNECT,
2602 "No additional client request received in time on socket %d.",
2605 #ifdef FEATURE_CONNECTION_SHARING
2606 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
2607 && (socket_is_still_alive(csp->server_connection.sfd)))
2609 time_t time_open = time(NULL) - csp->server_connection.timestamp;
2611 if (csp->server_connection.keep_alive_timeout < time_open - (time_t)latency)
2616 remember_connection(&csp->server_connection);
2617 csp->server_connection.sfd = JB_INVALID_SOCKET;
2618 drain_and_close_socket(csp->cfd);
2619 csp->cfd = JB_INVALID_SOCKET;
2620 privoxy_mutex_lock(&connection_reuse_mutex);
2621 if (!monitor_thread_running)
2623 monitor_thread_running = 1;
2624 privoxy_mutex_unlock(&connection_reuse_mutex);
2625 wait_for_alive_connections();
2626 privoxy_mutex_lock(&connection_reuse_mutex);
2627 monitor_thread_running = 0;
2629 privoxy_mutex_unlock(&connection_reuse_mutex);
2631 #endif /* def FEATURE_CONNECTION_SHARING */
2635 else if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2637 log_error(LOG_LEVEL_CONNECT,
2638 "The connection on server socket %d to %s isn't reusable. Closing. "
2639 "Server connection: keep-alive %u, tainted: %u, socket alive %u. "
2640 "Client connection: socket alive: %u. Server timeout: %u. "
2641 "Configuration file change detected: %u",
2642 csp->server_connection.sfd, csp->server_connection.host,
2643 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
2644 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
2645 socket_is_still_alive(csp->server_connection.sfd),
2646 socket_is_still_alive(csp->cfd),
2647 csp->server_connection.keep_alive_timeout,
2648 config_file_change_detected);
2650 } while (continue_chatting);
2654 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2656 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2658 #ifdef FEATURE_CONNECTION_SHARING
2659 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
2661 forget_connection(csp->server_connection.sfd);
2663 #endif /* def FEATURE_CONNECTION_SHARING */
2664 close_socket(csp->server_connection.sfd);
2667 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2668 mark_connection_closed(&csp->server_connection);
2671 if (csp->cfd != JB_INVALID_SOCKET)
2673 log_error(LOG_LEVEL_CONNECT, "Closing client socket %d. "
2674 "Keep-alive: %u, Socket alive: %u. Data available: %u.",
2675 csp->cfd, 0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE),
2676 socket_is_still_alive(csp->cfd), data_is_available(csp->cfd, 0));
2677 drain_and_close_socket(csp->cfd);
2680 csp->flags &= ~CSP_FLAG_ACTIVE;
2686 /*********************************************************************
2688 * Function : server_thread
2690 * Description : We only exist to call `serve' in a threaded environment.
2693 * 1 : data = Current client state (buffers, headers, etc...)
2695 * Returns : Always 0.
2697 *********************************************************************/
2698 static int32 server_thread(void *data)
2700 serve((struct client_state *) data);
2707 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2708 /*********************************************************************
2712 * Description : Print usage info & exit.
2714 * Parameters : Pointer to argv[0] for identifying ourselves
2718 *********************************************************************/
2719 static void usage(const char *myname)
2721 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2725 #endif /* defined(unix) */
2728 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
2729 #endif /* defined(unix) */
2730 "[--version] [configfile]\n"
2731 "Aborting\n", myname);
2736 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
2739 #ifdef MUTEX_LOCKS_AVAILABLE
2740 /*********************************************************************
2742 * Function : privoxy_mutex_lock
2744 * Description : Locks a mutex.
2747 * 1 : mutex = The mutex to lock.
2749 * Returns : Void. May exit in case of errors.
2751 *********************************************************************/
2752 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
2754 #ifdef FEATURE_PTHREAD
2755 int err = pthread_mutex_lock(mutex);
2758 if (mutex != &log_mutex)
2760 log_error(LOG_LEVEL_FATAL,
2761 "Mutex locking failed: %s.\n", strerror(err));
2766 EnterCriticalSection(mutex);
2767 #endif /* def FEATURE_PTHREAD */
2771 /*********************************************************************
2773 * Function : privoxy_mutex_unlock
2775 * Description : Unlocks a mutex.
2778 * 1 : mutex = The mutex to unlock.
2780 * Returns : Void. May exit in case of errors.
2782 *********************************************************************/
2783 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
2785 #ifdef FEATURE_PTHREAD
2786 int err = pthread_mutex_unlock(mutex);
2789 if (mutex != &log_mutex)
2791 log_error(LOG_LEVEL_FATAL,
2792 "Mutex unlocking failed: %s.\n", strerror(err));
2797 LeaveCriticalSection(mutex);
2798 #endif /* def FEATURE_PTHREAD */
2802 /*********************************************************************
2804 * Function : privoxy_mutex_init
2806 * Description : Prepares a mutex.
2809 * 1 : mutex = The mutex to initialize.
2811 * Returns : Void. May exit in case of errors.
2813 *********************************************************************/
2814 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
2816 #ifdef FEATURE_PTHREAD
2817 int err = pthread_mutex_init(mutex, 0);
2820 printf("Fatal error. Mutex initialization failed: %s.\n",
2825 InitializeCriticalSection(mutex);
2826 #endif /* def FEATURE_PTHREAD */
2828 #endif /* def MUTEX_LOCKS_AVAILABLE */
2830 /*********************************************************************
2832 * Function : initialize_mutexes
2834 * Description : Prepares mutexes if mutex support is available.
2838 * Returns : Void, exits in case of errors.
2840 *********************************************************************/
2841 static void initialize_mutexes(void)
2843 #ifdef MUTEX_LOCKS_AVAILABLE
2845 * Prepare global mutex semaphores
2847 privoxy_mutex_init(&log_mutex);
2848 privoxy_mutex_init(&log_init_mutex);
2849 privoxy_mutex_init(&connection_reuse_mutex);
2852 * XXX: The assumptions below are a bit naive
2853 * and can cause locks that aren't necessary.
2855 * For example older FreeBSD versions (< 6.x?)
2856 * have no gethostbyname_r, but gethostbyname is
2859 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
2860 privoxy_mutex_init(&resolver_mutex);
2861 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
2863 * XXX: should we use a single mutex for
2864 * localtime() and gmtime() as well?
2866 #ifndef HAVE_GMTIME_R
2867 privoxy_mutex_init(&gmtime_mutex);
2868 #endif /* ndef HAVE_GMTIME_R */
2870 #ifndef HAVE_LOCALTIME_R
2871 privoxy_mutex_init(&localtime_mutex);
2872 #endif /* ndef HAVE_GMTIME_R */
2875 privoxy_mutex_init(&rand_mutex);
2876 #endif /* ndef HAVE_RANDOM */
2878 #endif /* def MUTEX_LOCKS_AVAILABLE */
2882 /*********************************************************************
2886 * Description : Load the config file and start the listen loop.
2887 * This function is a lot more *sane* with the `load_config'
2888 * and `listen_loop' functions; although it stills does
2889 * a *little* too much for my taste.
2892 * 1 : argc = Number of parameters (including $0).
2893 * 2 : argv = Array of (char *)'s to the parameters.
2895 * Returns : 1 if : can't open config file, unrecognized directive,
2896 * stats requested in multi-thread mode, can't open the
2897 * log file, can't open the jar file, listen port is invalid,
2898 * any load fails, and can't bind port.
2900 * Else main never returns, the process must be signaled
2901 * to terminate execution. Or, on Windows, use the
2902 * "File", "Exit" menu option.
2904 *********************************************************************/
2906 int real_main(int argc, char **argv)
2908 int main(int argc, char **argv)
2912 unsigned int random_seed;
2914 struct passwd *pw = NULL;
2915 struct group *grp = NULL;
2917 char *pre_chroot_nslookup_to_load_resolver = NULL;
2924 #if !defined(_WIN32)
2931 /* Prepare mutexes if supported and necessary. */
2932 initialize_mutexes();
2934 /* Enable logging until further notice. */
2938 * Parse the command line arguments
2940 * XXX: simply printing usage information in case of
2941 * invalid arguments isn't particularly user friendly.
2943 while (++argc_pos < argc)
2946 /* Check to see if the service must be installed or uninstalled */
2947 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2949 const char *pName = argv[argc_pos] + 9;
2952 exit((install_service(pName)) ? 0 : 1);
2954 else if (strncmp(argv[argc_pos], "--uninstall", 11) == 0)
2956 const char *pName = argv[argc_pos] + 11;
2959 exit((uninstall_service(pName)) ? 0 : 1);
2961 else if (strcmp(argv[argc_pos], "--service") == 0)
2963 bRunAsService = TRUE;
2964 w32_set_service_cwd();
2965 atexit(w32_service_exit_notify);
2968 #endif /* defined(_WIN32) */
2971 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2973 if (strcmp(argv[argc_pos], "--help") == 0)
2978 else if (strcmp(argv[argc_pos], "--version") == 0)
2980 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2986 else if (strcmp(argv[argc_pos], "--no-daemon") == 0)
2988 set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
2992 else if (strcmp(argv[argc_pos], "--pidfile") == 0)
2994 if (++argc_pos == argc) usage(argv[0]);
2995 pidfile = strdup_or_die(argv[argc_pos]);
2998 else if (strcmp(argv[argc_pos], "--user") == 0)
3003 if (++argc_pos == argc) usage(argv[argc_pos]);
3005 user_arg = strdup_or_die(argv[argc_pos]);
3006 group_name = strchr(user_arg, '.');
3007 if (NULL != group_name)
3009 /* Nul-terminate the user name */
3012 /* Skip the former delimiter to actually reach the group name */
3015 grp = getgrnam(group_name);
3018 log_error(LOG_LEVEL_FATAL, "Group '%s' not found.", group_name);
3021 pw = getpwnam(user_arg);
3024 log_error(LOG_LEVEL_FATAL, "User '%s' not found.", user_arg);
3030 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup") == 0)
3032 if (++argc_pos == argc) usage(argv[0]);
3033 pre_chroot_nslookup_to_load_resolver = strdup_or_die(argv[argc_pos]);
3036 else if (strcmp(argv[argc_pos], "--chroot") == 0)
3040 #endif /* defined(unix) */
3042 else if (argc_pos + 1 != argc)
3045 * This is neither the last command line
3046 * option, nor was it recognized before,
3047 * therefore it must be invalid.
3053 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3055 configfile = argv[argc_pos];
3058 } /* -END- while (more arguments) */
3060 show_version(Argv[0]);
3063 if (*configfile != '/')
3065 char cwd[BUFFER_SIZE];
3067 size_t abs_file_size;
3069 /* make config-filename absolute here */
3070 if (NULL == getcwd(cwd, sizeof(cwd)))
3072 perror("failed to get current working directory");
3076 basedir = strdup_or_die(cwd);
3078 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3079 abs_file = malloc_or_die(abs_file_size);
3080 strlcpy(abs_file, basedir, abs_file_size);
3081 strlcat(abs_file, "/", abs_file_size);
3082 strlcat(abs_file, configfile, abs_file_size);
3083 configfile = abs_file;
3085 #endif /* defined unix */
3089 clients->next = NULL;
3091 /* XXX: factor out initialising after the next stable release. */
3094 #elif defined(_WIN32)
3098 random_seed = (unsigned int)time(NULL);
3100 srandom(random_seed);
3103 #endif /* ifdef HAVE_RANDOM */
3106 * Unix signal handling
3108 * Catch the abort, interrupt and terminate signals for a graceful exit
3109 * Catch the hangup signal so the errlog can be reopened.
3110 * Ignore the broken pipe signals (FIXME: Why?)
3112 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3115 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP };
3117 for (idx = 0; idx < SZ(catched_signals); idx++)
3119 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3120 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3122 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3123 #endif /* ifdef sun */
3125 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3129 if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
3131 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for SIGPIPE: %E");
3135 #else /* ifdef _WIN32 */
3136 # ifdef _WIN_CONSOLE
3138 * We *are* in a windows console app.
3139 * Print a verbose messages about FAQ's and such
3141 printf("%s", win32_blurb);
3142 # endif /* def _WIN_CONSOLE */
3143 #endif /* def _WIN32 */
3146 /* Initialize the CGI subsystem */
3147 cgi_init_error_messages();
3150 * If runnig on unix and without the --nodaemon
3151 * option, become a daemon. I.e. fork, detach
3152 * from tty and get process group leadership
3161 if (pid < 0) /* error */
3166 else if (pid != 0) /* parent */
3171 * must check for errors
3172 * child died due to missing files aso
3175 wpid = waitpid(pid, &status, WNOHANG);
3187 * stderr (fd 2) will be closed later on,
3188 * when the config file has been parsed.
3194 * Reserve fd 0 and 1 to prevent abort() and friends
3195 * from sending stuff to the clients or servers.
3197 fd = open("/dev/null", O_RDONLY);
3200 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
3204 if (dup2(fd, 0) == -1)
3206 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 0: %E");
3210 fd = open("/dev/null", O_WRONLY);
3213 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
3217 if (dup2(fd, 1) == -1)
3219 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 1: %E");
3226 } /* -END- if (daemon_mode) */
3229 * As soon as we have written the PID file, we can switch
3230 * to the user and group ID indicated by the --user option
3236 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3238 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3242 if (setgroups(1, &grp->gr_gid))
3244 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
3247 else if (initgroups(pw->pw_name, pw->pw_gid))
3249 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
3255 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3257 /* Read the time zone file from /etc before doing chroot. */
3259 if (NULL != pre_chroot_nslookup_to_load_resolver
3260 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3262 /* Initialize resolver library. */
3263 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3265 if (chroot(pw->pw_dir) < 0)
3267 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3271 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3274 if (setuid(pw->pw_uid))
3276 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3280 char putenv_dummy[64];
3282 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3283 if (putenv(putenv_dummy) != 0)
3285 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3288 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3289 if (putenv(putenv_dummy) != 0)
3291 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3297 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3300 #endif /* defined unix */
3303 /* This will be FALSE unless the command line specified --service
3307 /* Yup, so now we must attempt to establish a connection
3308 * with the service dispatcher. This will only work if this
3309 * process was launched by the service control manager to
3310 * actually run as a service. If this isn't the case, i've
3311 * known it take around 30 seconds or so for the call to return.
3314 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3315 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3317 /* Service has run, and at this point is now being stopped, so just return */
3322 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3324 /* An error occurred. Usually it's because --service was wrongly specified
3325 * and we were unable to connect to the Service Control Dispatcher because
3326 * it wasn't expecting us and is therefore not listening.
3328 * For now, just continue below to call the listen_loop function.
3331 #endif /* def _WIN32 */
3341 /*********************************************************************
3343 * Function : bind_port_helper
3345 * Description : Bind the listen port. Handles logging, and aborts
3349 * 1 : haddr = Host addres to bind to. Use NULL to bind to
3351 * 2 : hport = Specifies port to bind to.
3353 * Returns : Port that was opened.
3355 *********************************************************************/
3356 static jb_socket bind_port_helper(const char *haddr, int hport)
3361 result = bind_port(haddr, hport, &bfd);
3365 const char *bind_address = (NULL != haddr) ? haddr : "INADDR_ANY";
3369 log_error(LOG_LEVEL_FATAL,
3370 "can't bind to %s:%d: There may be another Privoxy "
3371 "or some other proxy running on port %d",
3372 bind_address, hport, hport);
3375 log_error(LOG_LEVEL_FATAL,
3376 "can't bind to %s:%d: The hostname is not resolvable",
3377 bind_address, hport);
3380 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: %E",
3381 bind_address, hport);
3384 /* shouldn't get here */
3385 return JB_INVALID_SOCKET;
3390 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3395 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3403 /*********************************************************************
3405 * Function : bind_ports_helper
3407 * Description : Bind the listen ports. Handles logging, and aborts
3411 * 1 : config = Privoxy configuration. Specifies ports
3413 * 2 : sockets = Preallocated array of opened sockets
3414 * corresponding to specification in config.
3415 * All non-opened sockets will be set to
3416 * JB_INVALID_SOCKET.
3418 * Returns : Nothing. Inspect sockets argument.
3420 *********************************************************************/
3421 static void bind_ports_helper(struct configuration_spec * config,
3422 jb_socket sockets[])
3426 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
3428 if (config->hport[i])
3430 sockets[i] = bind_port_helper(config->haddr[i], config->hport[i]);
3434 sockets[i] = JB_INVALID_SOCKET;
3437 config->need_bind = 0;
3441 /*********************************************************************
3443 * Function : close_ports_helper
3445 * Description : Close listenings ports.
3448 * 1 : sockets = Array of opened and non-opened sockets to
3449 * close. All sockets will be set to
3450 * JB_INVALID_SOCKET.
3452 * Returns : Nothing.
3454 *********************************************************************/
3455 static void close_ports_helper(jb_socket sockets[])
3459 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
3461 if (JB_INVALID_SOCKET != sockets[i])
3463 close_socket(sockets[i]);
3465 sockets[i] = JB_INVALID_SOCKET;
3471 /* Without this simple workaround we get this compiler warning from _beginthread
3472 * warning C4028: formal parameter 1 different from declaration
3474 void w32_service_listen_loop(void *p)
3478 #endif /* def _WIN32 */
3481 /*********************************************************************
3483 * Function : listen_loop
3485 * Description : bind the listen port and enter a "FOREVER" listening loop.
3491 *********************************************************************/
3492 static void listen_loop(void)
3494 struct client_states *csp_list = NULL;
3495 struct client_state *csp = NULL;
3496 jb_socket bfds[MAX_LISTENING_SOCKETS];
3497 struct configuration_spec *config;
3498 unsigned int active_threads = 0;
3500 config = load_config();
3502 #ifdef FEATURE_CONNECTION_SHARING
3504 * XXX: Should be relocated once it no
3505 * longer needs to emit log messages.
3507 initialize_reusable_connections();
3508 #endif /* def FEATURE_CONNECTION_SHARING */
3510 bind_ports_helper(config, bfds);
3512 #ifdef FEATURE_GRACEFUL_TERMINATION
3513 while (!g_terminate)
3518 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3519 while (waitpid(-1, NULL, WNOHANG) > 0)
3521 /* zombie children */
3523 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3526 * Free data that was used by died threads
3528 active_threads = sweep();
3532 * Re-open the errlog after HUP signal
3534 if (received_hup_signal)
3536 if (NULL != config->logfile)
3538 init_error_log(Argv[0], config->logfile);
3540 received_hup_signal = 0;
3544 csp_list = (struct client_states *)zalloc(sizeof(*csp_list));
3545 if (NULL == csp_list)
3547 log_error(LOG_LEVEL_FATAL,
3548 "malloc(%d) for csp_list failed: %E", sizeof(*csp_list));
3551 csp = &csp_list->csp;
3553 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3555 if (!accept_connection(csp, bfds))
3557 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3569 csp->flags |= CSP_FLAG_ACTIVE;
3570 csp->server_connection.sfd = JB_INVALID_SOCKET;
3572 csp->config = config = load_config();
3574 if (config->need_bind)
3577 * Since we were listening to the "old port", we will not see
3578 * a "listen" param change until the next request. So, at
3579 * least 1 more request must be made for us to find the new
3580 * setting. I am simply closing the old socket and binding the
3583 * Which-ever is correct, we will serve 1 more page via the
3584 * old settings. This should probably be a "show-proxy-args"
3585 * request. This should not be a so common of an operation
3586 * that this will hurt people's feelings.
3589 close_ports_helper(bfds);
3591 bind_ports_helper(config, bfds);
3594 #ifdef FEATURE_TOGGLE
3595 if (global_toggle_state)
3596 #endif /* def FEATURE_TOGGLE */
3598 csp->flags |= CSP_FLAG_TOGGLED_ON;
3601 if (run_loader(csp))
3603 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3604 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3608 if (block_acl(NULL,csp))
3610 log_error(LOG_LEVEL_CONNECT,
3611 "Connection from %s on socket %d dropped due to ACL", csp->ip_addr_str, csp->cfd);
3612 close_socket(csp->cfd);
3613 freez(csp->ip_addr_str);
3617 #endif /* def FEATURE_ACL */
3619 if ((0 != config->max_client_connections)
3620 && (active_threads >= config->max_client_connections))
3622 log_error(LOG_LEVEL_CONNECT,
3623 "Rejecting connection from %s. Maximum number of connections reached.",
3625 write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
3626 strlen(TOO_MANY_CONNECTIONS_RESPONSE));
3627 close_socket(csp->cfd);
3628 freez(csp->ip_addr_str);
3633 /* add it to the list of clients */
3634 csp_list->next = clients->next;
3635 clients->next = csp_list;
3637 if (config->multi_threaded)
3641 /* this is a switch () statement in the C preprocessor - ugh */
3642 #undef SELECTED_ONE_OPTION
3644 /* Use Pthreads in preference to native code */
3645 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3646 #define SELECTED_ONE_OPTION
3648 pthread_t the_thread;
3649 pthread_attr_t attrs;
3651 pthread_attr_init(&attrs);
3652 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3653 errno = pthread_create(&the_thread, &attrs,
3654 (void * (*)(void *))serve, csp);
3655 child_id = errno ? -1 : 0;
3656 pthread_attr_destroy(&attrs);
3660 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3661 #define SELECTED_ONE_OPTION
3662 child_id = _beginthread(
3663 (void (*)(void *))serve,
3668 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3669 #define SELECTED_ONE_OPTION
3670 child_id = _beginthread(
3671 (void(* _Optlink)(void*))serve,
3677 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3678 #define SELECTED_ONE_OPTION
3680 thread_id tid = spawn_thread
3681 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3683 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3685 child_id = (int) tid;
3694 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3695 #define SELECTED_ONE_OPTION
3696 csp->cfd = ReleaseSocket(csp->cfd, -1);
3699 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3700 NP_Output, Output(),
3701 NP_CloseOutput, FALSE,
3702 NP_Name, (ULONG)"privoxy child",
3706 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3707 NP_Output, Output(),
3708 NP_CloseOutput, FALSE,
3709 NP_Name, (ULONG)"privoxy child",
3710 NP_StackSize, 200*1024,
3716 ((struct Task *)child_id)->tc_UserData = csp;
3717 Signal((struct Task *)child_id, SIGF_SINGLE);
3722 #if !defined(SELECTED_ONE_OPTION)
3725 /* This block is only needed when using fork().
3726 * When using threads, the server thread was
3727 * created and run by the call to _beginthread().
3729 if (child_id == 0) /* child */
3732 #ifdef FEATURE_TOGGLE
3733 int inherited_toggle_state = global_toggle_state;
3734 #endif /* def FEATURE_TOGGLE */
3739 * If we've been toggled or we've blocked the request, tell Mom
3742 #ifdef FEATURE_TOGGLE
3743 if (inherited_toggle_state != global_toggle_state)
3745 rc |= RC_FLAG_TOGGLED;
3747 #endif /* def FEATURE_TOGGLE */
3749 #ifdef FEATURE_STATISTICS
3750 if (csp->flags & CSP_FLAG_REJECTED)
3752 rc |= RC_FLAG_BLOCKED;
3754 #endif /* ndef FEATURE_STATISTICS */
3758 else if (child_id > 0) /* parent */
3760 /* in a fork()'d environment, the parent's
3761 * copy of the client socket and the CSP
3765 #if !defined(_WIN32) && !defined(__CYGWIN__)
3767 wait(&child_status);
3770 * Evaluate child's return code: If the child has
3771 * - been toggled, toggle ourselves
3772 * - blocked its request, bump up the stats counter
3775 #ifdef FEATURE_TOGGLE
3776 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
3778 global_toggle_state = !global_toggle_state;
3780 #endif /* def FEATURE_TOGGLE */
3782 #ifdef FEATURE_STATISTICS
3784 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
3788 #endif /* def FEATURE_STATISTICS */
3790 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
3791 close_socket(csp->cfd);
3792 csp->flags &= ~CSP_FLAG_ACTIVE;
3796 #undef SELECTED_ONE_OPTION
3797 /* end of cpp switch () */
3802 * Spawning the child failed, assume it's because
3803 * there are too many children running already.
3804 * XXX: If you assume ...
3806 log_error(LOG_LEVEL_ERROR,
3807 "Unable to take any additional connections: %E");
3808 write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
3809 strlen(TOO_MANY_CONNECTIONS_RESPONSE));
3810 close_socket(csp->cfd);
3811 csp->flags &= ~CSP_FLAG_ACTIVE;
3820 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
3822 /* Clean up. Aim: free all memory (no leaks) */
3823 #ifdef FEATURE_GRACEFUL_TERMINATION
3825 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
3827 unload_current_config_file();
3828 unload_current_actions_file();
3829 unload_current_re_filterfile();
3830 #ifdef FEATURE_TRUST
3831 unload_current_trust_file();
3834 if (config->multi_threaded)
3841 } while ((clients->next != NULL) && (--i > 0));
3845 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
3855 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
3856 /* Cleanup - remove taskbar icon etc. */
3861 #endif /* FEATURE_GRACEFUL_TERMINATION */