1 const char jcc_rcs[] = "$Id: jcc.c,v 1.381 2012/07/23 12:40:52 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) 2001-2010 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 : send_crunch_response
668 * Description : Delivers already prepared response for
669 * intercepted requests, logs the interception
670 * and frees the response.
673 * 1 : csp = Current client state (buffers, headers, etc...)
674 * 1 : rsp = Fully prepared response. Will be freed on exit.
678 *********************************************************************/
679 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
681 const struct http_request *http = csp->http;
685 assert(rsp->head != NULL);
689 log_error(LOG_LEVEL_FATAL, "NULL response in send_crunch_response.");
693 * Extract the status code from the actual head
694 * that will be send to the client. It is the only
695 * way to get it right for all requests, including
696 * the fixed ones for out-of-memory problems.
698 * A head starts like this: 'HTTP/1.1 200...'
702 status_code[0] = rsp->head[9];
703 status_code[1] = rsp->head[10];
704 status_code[2] = rsp->head[11];
705 status_code[3] = '\0';
707 /* Log that the request was crunched and why. */
708 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
709 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %u",
710 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
712 /* Write the answer to the client */
713 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
714 || write_socket(csp->cfd, rsp->body, rsp->content_length))
716 /* There is nothing we can do about it. */
717 log_error(LOG_LEVEL_ERROR,
718 "Couldn't deliver the error message through client socket %d: %E",
722 /* Clean up and return */
723 if (cgi_error_memory() != rsp)
725 free_http_response(rsp);
731 /*********************************************************************
733 * Function : crunch_response_triggered
735 * Description : Checks if the request has to be crunched,
736 * and delivers the crunch response if necessary.
739 * 1 : csp = Current client state (buffers, headers, etc...)
740 * 2 : crunchers = list of cruncher functions to run
742 * Returns : TRUE if the request was answered with a crunch response
745 *********************************************************************/
746 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
748 struct http_response *rsp = NULL;
749 const struct cruncher *c;
752 * If CGI request crunching is disabled,
753 * check the CGI dispatcher out of order to
754 * prevent unintentional blocks or redirects.
756 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
757 && (NULL != (rsp = dispatch_cgi(csp))))
759 /* Deliver, log and free the interception response. */
760 send_crunch_response(csp, rsp);
761 csp->flags |= CSP_FLAG_CRUNCHED;
765 for (c = crunchers; c->cruncher != NULL; c++)
768 * Check the cruncher if either Privoxy is toggled
769 * on and the request isn't forced, or if the cruncher
770 * applies to forced requests as well.
772 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
773 !(csp->flags & CSP_FLAG_FORCED)) ||
774 (c->flags & CF_IGNORE_FORCE))
776 rsp = c->cruncher(csp);
779 /* Deliver, log and free the interception response. */
780 send_crunch_response(csp, rsp);
781 csp->flags |= CSP_FLAG_CRUNCHED;
782 #ifdef FEATURE_STATISTICS
783 if (c->flags & CF_COUNT_AS_REJECT)
785 csp->flags |= CSP_FLAG_REJECTED;
787 #endif /* def FEATURE_STATISTICS */
798 /*********************************************************************
800 * Function : build_request_line
802 * Description : Builds the HTTP request line.
804 * If a HTTP forwarder is used it expects the whole URL,
805 * web servers only get the path.
808 * 1 : csp = Current client state (buffers, headers, etc...)
809 * 2 : fwd = The forwarding spec used for the request
810 * XXX: Should use http->fwd instead.
811 * 3 : request_line = The old request line which will be replaced.
813 * Returns : Nothing. Terminates in case of memory problems.
815 *********************************************************************/
816 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
818 struct http_request *http = csp->http;
820 assert(http->ssl == 0);
823 * Downgrade http version from 1.1 to 1.0
824 * if +downgrade action applies.
826 if ((csp->action->flags & ACTION_DOWNGRADE)
827 && (!strcmpic(http->ver, "HTTP/1.1")))
830 http->ver = strdup_or_die("HTTP/1.0");
834 * Rebuild the request line.
836 freez(*request_line);
837 *request_line = strdup(http->gpc);
838 string_append(request_line, " ");
840 if (fwd->forward_host)
842 string_append(request_line, http->url);
846 string_append(request_line, http->path);
848 string_append(request_line, " ");
849 string_append(request_line, http->ver);
851 if (*request_line == NULL)
853 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
855 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
859 /*********************************************************************
861 * Function : change_request_destination
863 * Description : Parse a (rewritten) request line and regenerate
864 * the http request data.
867 * 1 : csp = Current client state (buffers, headers, etc...)
869 * Returns : Forwards the parse_http_request() return code.
870 * Terminates in case of memory problems.
872 *********************************************************************/
873 static jb_err change_request_destination(struct client_state *csp)
875 struct http_request *http = csp->http;
878 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
879 free_http_request(http);
880 err = parse_http_request(csp->headers->first->str, http);
881 if (JB_ERR_OK != err)
883 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
884 jb_err_to_string(err));
888 /* XXX: ocmd is a misleading name */
889 http->ocmd = strdup_or_die(http->cmd);
896 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
897 /*********************************************************************
899 * Function : server_response_is_complete
901 * Description : Determines whether we should stop reading
902 * from the server socket.
905 * 1 : csp = Current client state (buffers, headers, etc...)
906 * 2 : content_length = Length of content received so far.
908 * Returns : TRUE if the response is complete,
911 *********************************************************************/
912 static int server_response_is_complete(struct client_state *csp,
913 unsigned long long content_length)
915 int content_length_known = !!(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
917 if (!strcmpic(csp->http->gpc, "HEAD"))
920 * "HEAD" implies no body, we are thus expecting
921 * no content. XXX: incomplete "list" of methods?
923 csp->expected_content_length = 0;
924 content_length_known = TRUE;
927 if (csp->http->status == 204 || csp->http->status == 304)
930 * Expect no body. XXX: incomplete "list" of status codes?
932 csp->expected_content_length = 0;
933 content_length_known = TRUE;
936 return (content_length_known && ((0 == csp->expected_content_length)
937 || (csp->expected_content_length <= content_length)));
941 #ifdef FEATURE_CONNECTION_SHARING
942 /*********************************************************************
944 * Function : wait_for_alive_connections
946 * Description : Waits for alive connections to timeout.
952 *********************************************************************/
953 static void wait_for_alive_connections(void)
955 int connections_alive = close_unusable_connections();
957 while (0 < connections_alive)
959 log_error(LOG_LEVEL_CONNECT,
960 "Waiting for %d connections to timeout.",
963 connections_alive = close_unusable_connections();
966 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
969 #endif /* def FEATURE_CONNECTION_SHARING */
972 /*********************************************************************
974 * Function : save_connection_destination
976 * Description : Remembers a connection for reuse later on.
979 * 1 : sfd = Open socket to remember.
980 * 2 : http = The destination for the connection.
981 * 3 : fwd = The forwarder settings used.
982 * 3 : server_connection = storage.
986 *********************************************************************/
987 void save_connection_destination(jb_socket sfd,
988 const struct http_request *http,
989 const struct forward_spec *fwd,
990 struct reusable_connection *server_connection)
992 assert(sfd != JB_INVALID_SOCKET);
993 assert(NULL != http->host);
995 server_connection->sfd = sfd;
996 server_connection->host = strdup_or_die(http->host);
997 server_connection->port = http->port;
1000 assert(server_connection->gateway_host == NULL);
1001 assert(server_connection->gateway_port == 0);
1002 assert(server_connection->forwarder_type == 0);
1003 assert(server_connection->forward_host == NULL);
1004 assert(server_connection->forward_port == 0);
1006 server_connection->forwarder_type = fwd->type;
1007 if (NULL != fwd->gateway_host)
1009 server_connection->gateway_host = strdup_or_die(fwd->gateway_host);
1013 server_connection->gateway_host = NULL;
1015 server_connection->gateway_port = fwd->gateway_port;
1017 if (NULL != fwd->forward_host)
1019 server_connection->forward_host = strdup_or_die(fwd->forward_host);
1023 server_connection->forward_host = NULL;
1025 server_connection->forward_port = fwd->forward_port;
1029 /*********************************************************************
1031 * Function : verify_request_length
1033 * Description : Checks if we already got the whole client requests
1034 * and sets CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ if
1037 * Data that doesn't belong to the current request is
1038 * thrown away to let the client retry on a clean socket.
1040 * XXX: This is a hack until we can deal with multiple
1041 * pipelined requests at the same time.
1045 * 1 : csp = Current client state (buffers, headers, etc...)
1049 *********************************************************************/
1050 static void verify_request_length(struct client_state *csp)
1052 unsigned long long buffered_request_bytes =
1053 (unsigned long long)(csp->iob->eod - csp->iob->cur);
1055 if ((csp->expected_client_content_length != 0)
1056 && (buffered_request_bytes != 0))
1058 if (csp->expected_client_content_length >= buffered_request_bytes)
1060 csp->expected_client_content_length -= buffered_request_bytes;
1061 log_error(LOG_LEVEL_CONNECT, "Reduced expected bytes to %llu "
1062 "to account for the %llu ones we already got.",
1063 csp->expected_client_content_length, buffered_request_bytes);
1067 assert(csp->iob->eod > csp->iob->cur + csp->expected_client_content_length);
1068 csp->iob->eod = csp->iob->cur + csp->expected_client_content_length;
1069 log_error(LOG_LEVEL_CONNECT, "Reducing expected bytes to 0. "
1070 "Marking the server socket tainted after throwing %llu bytes away.",
1071 buffered_request_bytes - csp->expected_client_content_length);
1072 csp->expected_client_content_length = 0;
1073 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1076 if (csp->expected_client_content_length == 0)
1078 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1082 if (!(csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ)
1083 && ((csp->iob->cur[0] != '\0') || (csp->expected_client_content_length != 0)))
1085 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1086 if (strcmpic(csp->http->gpc, "GET")
1087 && strcmpic(csp->http->gpc, "HEAD")
1088 && strcmpic(csp->http->gpc, "TRACE")
1089 && strcmpic(csp->http->gpc, "OPTIONS")
1090 && strcmpic(csp->http->gpc, "DELETE"))
1092 /* XXX: this is an incomplete hack */
1093 csp->flags &= ~CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1094 log_error(LOG_LEVEL_CONNECT,
1095 "There might be a request body. The connection will not be kept alive.");
1099 /* XXX: and so is this */
1100 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1101 log_error(LOG_LEVEL_CONNECT,
1102 "Possible pipeline attempt detected. The connection will not "
1103 "be kept alive and we will only serve the first request.");
1104 /* Nuke the pipelined requests from orbit, just to be sure. */
1105 csp->iob->buf[0] = '\0';
1106 csp->iob->eod = csp->iob->cur = csp->iob->buf;
1111 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1112 log_error(LOG_LEVEL_CONNECT, "Complete client request received.");
1115 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1118 /*********************************************************************
1120 * Function : mark_server_socket_tainted
1122 * Description : Makes sure we don't reuse a server socket
1123 * (if we didn't read everything the server sent
1124 * us reusing the socket would lead to garbage).
1127 * 1 : csp = Current client state (buffers, headers, etc...)
1131 *********************************************************************/
1132 static void mark_server_socket_tainted(struct client_state *csp)
1135 * For consistency we always mark the server socket
1136 * tainted, however, to reduce the log noise we only
1137 * emit a log message if the server socket could have
1138 * actually been reused.
1140 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
1141 && !(csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED))
1143 log_error(LOG_LEVEL_CONNECT,
1144 "Marking the server socket %d tainted.",
1145 csp->server_connection.sfd);
1147 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1150 /*********************************************************************
1152 * Function : get_request_line
1154 * Description : Read the client request line.
1157 * 1 : csp = Current client state (buffers, headers, etc...)
1159 * Returns : Pointer to request line or NULL in case of errors.
1161 *********************************************************************/
1162 static char *get_request_line(struct client_state *csp)
1164 char buf[BUFFER_SIZE];
1165 char *request_line = NULL;
1168 memset(buf, 0, sizeof(buf));
1172 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1174 if (socket_is_still_alive(csp->cfd))
1176 log_error(LOG_LEVEL_CONNECT,
1177 "No request line on socket %d received in time. Timeout: %d.",
1178 csp->cfd, csp->config->socket_timeout);
1179 write_socket(csp->cfd, CLIENT_CONNECTION_TIMEOUT_RESPONSE,
1180 strlen(CLIENT_CONNECTION_TIMEOUT_RESPONSE));
1184 log_error(LOG_LEVEL_CONNECT,
1185 "The client side of the connection on socket %d got "
1186 "closed without sending a complete request line.", csp->cfd);
1191 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1193 if (len <= 0) return NULL;
1196 * If there is no memory left for buffering the
1197 * request, there is nothing we can do but hang up
1199 if (add_to_iob(csp, buf, len))
1204 request_line = get_header(csp->iob);
1206 } while ((NULL != request_line) && ('\0' == *request_line));
1208 return request_line;
1213 /*********************************************************************
1215 * Function : receive_client_request
1217 * Description : Read the client's request (more precisely the
1218 * client headers) and answer it if necessary.
1221 * 1 : csp = Current client state (buffers, headers, etc...)
1223 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
1225 *********************************************************************/
1226 static jb_err receive_client_request(struct client_state *csp)
1228 char buf[BUFFER_SIZE];
1231 struct http_request *http;
1235 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1236 struct list header_list;
1237 struct list *headers = &header_list;
1241 memset(buf, 0, sizeof(buf));
1243 req = get_request_line(csp);
1246 mark_server_socket_tainted(csp);
1247 return JB_ERR_PARSE;
1249 assert(*req != '\0');
1251 if (client_protocol_is_unsupported(csp, req))
1253 return JB_ERR_PARSE;
1256 #ifdef FEATURE_FORCE_LOAD
1258 * If this request contains the FORCE_PREFIX and blocks
1259 * aren't enforced, get rid of it and set the force flag.
1261 if (strstr(req, FORCE_PREFIX))
1263 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
1265 log_error(LOG_LEVEL_FORCE,
1266 "Ignored force prefix in request: \"%s\".", req);
1270 strclean(req, FORCE_PREFIX);
1271 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
1272 csp->flags |= CSP_FLAG_FORCED;
1275 #endif /* def FEATURE_FORCE_LOAD */
1277 err = parse_http_request(req, http);
1279 if (JB_ERR_OK != err)
1281 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1282 /* XXX: Use correct size */
1283 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1284 log_error(LOG_LEVEL_ERROR,
1285 "Couldn't parse request line received from %s: %s",
1286 csp->ip_addr_str, jb_err_to_string(err));
1288 free_http_request(http);
1289 return JB_ERR_PARSE;
1292 /* grab the rest of the client's headers */
1296 p = get_header(csp->iob);
1300 /* There are no additional headers to read. */
1307 * We didn't receive a complete header
1308 * line yet, get the rest of it.
1310 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1312 log_error(LOG_LEVEL_ERROR,
1313 "Stopped grabbing the client headers.");
1314 destroy_list(headers);
1315 return JB_ERR_PARSE;
1318 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1321 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1322 destroy_list(headers);
1323 return JB_ERR_PARSE;
1326 if (add_to_iob(csp, buf, len))
1329 * If there is no memory left for buffering the
1330 * request, there is nothing we can do but hang up
1332 destroy_list(headers);
1333 return JB_ERR_MEMORY;
1339 * We were able to read a complete
1340 * header and can finally enlist it.
1347 if (http->host == NULL)
1350 * If we still don't know the request destination,
1351 * the request is invalid or the client uses
1352 * Privoxy without its knowledge.
1354 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1357 * Our attempts to get the request destination
1358 * elsewhere failed or Privoxy is configured
1359 * to only accept proxy requests.
1361 * An error response has already been send
1362 * and we're done here.
1364 return JB_ERR_PARSE;
1369 * Determine the actions for this URL
1371 #ifdef FEATURE_TOGGLE
1372 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1374 /* Most compatible set of actions (i.e. none) */
1375 init_current_action(csp->action);
1378 #endif /* ndef FEATURE_TOGGLE */
1380 get_url_actions(csp, http);
1384 * Save a copy of the original request for logging
1386 http->ocmd = strdup_or_die(http->cmd);
1387 enlist(csp->headers, http->cmd);
1389 /* Append the previously read headers */
1390 list_append_list_unique(csp->headers, headers);
1391 destroy_list(headers);
1398 /*********************************************************************
1400 * Function : parse_client_request
1402 * Description : Parses the client's request and decides what to do
1405 * Note that since we're not using select() we could get
1406 * blocked here if a client connected, then didn't say
1410 * 1 : csp = Current client state (buffers, headers, etc...)
1412 * Returns : JB_ERR_OK or JB_ERR_PARSE
1414 *********************************************************************/
1415 static jb_err parse_client_request(struct client_state *csp)
1417 struct http_request *http = csp->http;
1420 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1421 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
1422 && (!strcmpic(csp->http->ver, "HTTP/1.1"))
1423 && (csp->http->ssl == 0))
1425 /* Assume persistence until further notice */
1426 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
1428 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1430 err = sed(csp, FILTER_CLIENT_HEADERS);
1431 if (JB_ERR_OK != err)
1433 /* XXX: Should be handled in sed(). */
1434 assert(err == JB_ERR_PARSE);
1435 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
1437 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
1439 /* Check request line for rewrites. */
1440 if ((NULL == csp->headers->first->str)
1441 || (strcmp(http->cmd, csp->headers->first->str) &&
1442 (JB_ERR_OK != change_request_destination(csp))))
1445 * A header filter broke the request line - bail out.
1447 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
1448 /* XXX: Use correct size */
1449 log_error(LOG_LEVEL_CLF,
1450 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
1451 log_error(LOG_LEVEL_ERROR,
1452 "Invalid request line after applying header filters.");
1453 free_http_request(http);
1455 return JB_ERR_PARSE;
1458 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1459 if (csp->http->ssl == 0)
1461 verify_request_length(csp);
1463 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1470 /*********************************************************************
1474 * Description : Once a connection from the client has been accepted,
1475 * this function is called (via serve()) to handle the
1476 * main business of the communication. This function
1477 * returns after dealing with a single request. It can
1478 * be called multiple times with the same client socket
1479 * if the client is keeping the connection alive.
1481 * The decision whether or not a client connection will
1482 * be kept alive is up to the caller which also must
1483 * close the client socket when done.
1485 * FIXME: chat is nearly thousand lines long.
1489 * 1 : csp = Current client state (buffers, headers, etc...)
1491 * Returns : Nothing.
1493 *********************************************************************/
1494 static void chat(struct client_state *csp)
1496 char buf[BUFFER_SIZE];
1503 int ms_iis5_hack = 0;
1504 unsigned long long byte_count = 0;
1505 const struct forward_spec *fwd;
1506 struct http_request *http;
1507 long len = 0; /* for buffer sizes (and negative error codes) */
1508 int buffer_and_filter_content = 0;
1510 /* Skeleton for HTTP response, if we should intercept the request */
1511 struct http_response *rsp;
1512 struct timeval timeout;
1513 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1514 int watch_client_socket = 1;
1517 memset(buf, 0, sizeof(buf));
1521 if (receive_client_request(csp) != JB_ERR_OK)
1525 if (parse_client_request(csp) != JB_ERR_OK)
1530 /* decide how to route the HTTP request */
1531 fwd = forward_url(csp, http);
1534 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1535 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1540 * build the http request to send to the server
1541 * we have to do one of the following:
1543 * create = use the original HTTP request to create a new
1544 * HTTP request that has either the path component
1545 * without the http://domainspec (w/path) or the
1546 * full orininal URL (w/url)
1547 * Note that the path and/or the HTTP version may
1548 * have been altered by now.
1550 * connect = Open a socket to the host:port of the server
1551 * and short-circuit server and client socket.
1553 * pass = Pass the request unchanged if forwarding a CONNECT
1554 * request to a parent proxy. Note that we'll be sending
1555 * the CFAIL message ourselves if connecting to the parent
1556 * fails, but we won't send a CSUCCEED message if it works,
1557 * since that would result in a double message (ours and the
1558 * parent's). After sending the request to the parent, we simply
1561 * here's the matrix:
1564 * +--------+--------+
1566 * 0 | create | connect|
1568 * Forwarding +--------+--------+
1570 * 1 | create | pass |
1572 * +--------+--------+
1576 if (http->ssl && connect_port_is_forbidden(csp))
1578 const char *acceptable_connect_ports =
1579 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
1580 assert(NULL != acceptable_connect_ports);
1581 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
1582 "limit-connect{%s} doesn't allow CONNECT requests to %s",
1583 csp->ip_addr_str, acceptable_connect_ports, csp->http->hostport);
1584 csp->action->flags |= ACTION_BLOCK;
1590 freez(csp->headers->first->str);
1591 build_request_line(csp, fwd, &csp->headers->first->str);
1595 * We have a request. Check if one of the crunchers wants it.
1597 if (crunch_response_triggered(csp, crunchers_all))
1600 * Yes. The client got the crunch response and we're done here.
1605 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1607 if (fwd->forward_host)
1609 log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
1610 fwd->forward_host, fwd->forward_port, http->hostport);
1614 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1617 /* here we connect to the server, gateway, or the forwarder */
1619 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1620 if ((csp->server_connection.sfd != JB_INVALID_SOCKET)
1621 && socket_is_still_alive(csp->server_connection.sfd)
1622 && connection_destination_matches(&csp->server_connection, http, fwd))
1624 log_error(LOG_LEVEL_CONNECT,
1625 "Reusing server socket %u. Opened for %s.",
1626 csp->server_connection.sfd, csp->server_connection.host);
1630 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
1632 log_error(LOG_LEVEL_CONNECT,
1633 "Closing server socket %u. Opened for %s.",
1634 csp->server_connection.sfd, csp->server_connection.host);
1635 close_socket(csp->server_connection.sfd);
1636 mark_connection_closed(&csp->server_connection);
1638 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1640 csp->server_connection.sfd = forwarded_connect(fwd, http, csp);
1642 if (csp->server_connection.sfd == JB_INVALID_SOCKET)
1644 if (fwd->type != SOCKS_NONE)
1647 rsp = error_response(csp, "forwarding-failed");
1649 else if (errno == EINVAL)
1651 rsp = error_response(csp, "no-such-domain");
1655 rsp = error_response(csp, "connect-failed");
1658 /* Write the answer to the client */
1661 send_crunch_response(csp, rsp);
1666 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1667 save_connection_destination(csp->server_connection.sfd,
1668 http, fwd, &csp->server_connection);
1669 csp->server_connection.keep_alive_timeout =
1670 (unsigned)csp->config->keep_alive_timeout;
1672 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1674 if (fwd->forward_host || (http->ssl == 0))
1676 hdr = list_to_text(csp->headers);
1679 /* FIXME Should handle error properly */
1680 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1682 list_remove_all(csp->headers);
1685 * Write the client's (modified) header to the server
1686 * (along with anything else that may be in the buffer)
1688 if (write_socket(csp->server_connection.sfd, hdr, strlen(hdr))
1689 || (flush_socket(csp->server_connection.sfd, csp->iob) < 0))
1691 log_error(LOG_LEVEL_CONNECT,
1692 "write header to: %s failed: %E", http->hostport);
1694 rsp = error_response(csp, "connect-failed");
1697 send_crunch_response(csp, rsp);
1708 * We're running an SSL tunnel and we're not forwarding,
1709 * so just ditch the client headers, send the "connect succeeded"
1710 * message to the client, flush the rest, and get out of the way.
1712 list_remove_all(csp->headers);
1713 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
1720 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
1722 csp->server_connection.request_sent = time(NULL);
1724 maxfd = (csp->cfd > csp->server_connection.sfd) ?
1725 csp->cfd : csp->server_connection.sfd;
1727 /* pass data between the client and server
1728 * until one or the other shuts down the connection.
1737 * FD_ZERO here seems to point to an errant macro which crashes.
1738 * So do this by hand for now...
1740 memset(&rfds,0x00,sizeof(fd_set));
1744 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1745 if (!watch_client_socket)
1747 maxfd = csp->server_connection.sfd;
1750 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1752 FD_SET(csp->cfd, &rfds);
1755 FD_SET(csp->server_connection.sfd, &rfds);
1757 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1758 if ((csp->flags & CSP_FLAG_CHUNKED)
1759 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
1760 && ((csp->iob->eod - csp->iob->cur) >= 5)
1761 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
1764 * XXX: This check should be obsolete now,
1765 * but let's wait a while to be sure.
1767 log_error(LOG_LEVEL_CONNECT,
1768 "Looks like we got the last chunk together with "
1769 "the server headers but didn't detect it earlier. "
1770 "We better stop reading.");
1771 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
1772 csp->expected_content_length = byte_count;
1773 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
1775 if (server_body && server_response_is_complete(csp, byte_count))
1777 if (csp->expected_content_length == byte_count)
1779 log_error(LOG_LEVEL_CONNECT,
1780 "Done reading from server. Content length: %llu as expected. "
1781 "Bytes most recently read: %d.",
1786 log_error(LOG_LEVEL_CONNECT,
1787 "Done reading from server. Expected content length: %llu. "
1788 "Actual content length: %llu. Bytes most recently read: %d.",
1789 csp->expected_content_length, byte_count, len);
1793 * XXX: should not jump around,
1794 * chat() is complicated enough already.
1798 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1800 timeout.tv_sec = csp->config->socket_timeout;
1801 timeout.tv_usec = 0;
1802 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
1806 log_error(LOG_LEVEL_ERROR,
1807 "Didn't receive data in time: %s", http->url);
1808 if ((byte_count == 0) && (http->ssl == 0))
1810 send_crunch_response(csp, error_response(csp, "connection-timeout"));
1812 mark_server_socket_tainted(csp);
1817 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1818 mark_server_socket_tainted(csp);
1823 * This is the body of the browser's request,
1824 * just read and write it.
1826 * XXX: Make sure the client doesn't use pipelining
1827 * behind Privoxy's back.
1829 if (FD_ISSET(csp->cfd, &rfds))
1831 int max_bytes_to_read = sizeof(buf) - 1;
1833 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1834 if ((csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
1836 if (data_is_available(csp->cfd, 0))
1839 * If the next request is already waiting, we have
1840 * to stop select()ing the client socket. Otherwise
1841 * we would always return right away and get nothing
1844 watch_client_socket = 0;
1845 log_error(LOG_LEVEL_CONNECT,
1846 "Stopping to watch the client socket %d. "
1847 "There's already another request waiting.",
1852 * If the client socket is set, but there's no data
1853 * available on the socket, the client went fishing
1854 * and continuing talking to the server makes no sense.
1856 log_error(LOG_LEVEL_CONNECT,
1857 "The client closed socket %d while "
1858 "the server socket %d is still open.",
1859 csp->cfd, csp->server_connection.sfd);
1860 mark_server_socket_tainted(csp);
1863 if (csp->expected_client_content_length != 0)
1865 if (csp->expected_client_content_length < (sizeof(buf) - 1))
1867 max_bytes_to_read = (int)csp->expected_client_content_length;
1869 log_error(LOG_LEVEL_CONNECT,
1870 "Waiting for up to %d bytes from the client.",
1873 assert(max_bytes_to_read < sizeof(buf));
1874 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1876 len = read_socket(csp->cfd, buf, max_bytes_to_read);
1880 /* XXX: not sure if this is necessary. */
1881 mark_server_socket_tainted(csp);
1882 break; /* "game over, man" */
1885 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1886 if (csp->expected_client_content_length != 0)
1888 assert(len <= max_bytes_to_read);
1889 csp->expected_client_content_length -= (unsigned)len;
1890 log_error(LOG_LEVEL_CONNECT,
1891 "Expected client content length set to %llu "
1892 "after reading %d bytes.",
1893 csp->expected_client_content_length, len);
1894 if (csp->expected_client_content_length == 0)
1896 log_error(LOG_LEVEL_CONNECT,
1897 "Done reading from the client.");
1898 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1901 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1903 if (write_socket(csp->server_connection.sfd, buf, (size_t)len))
1905 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1906 mark_server_socket_tainted(csp);
1913 * The server wants to talk. It could be the header or the body.
1914 * If `hdr' is null, then it's the header otherwise it's the body.
1915 * FIXME: Does `hdr' really mean `host'? No.
1917 if (FD_ISSET(csp->server_connection.sfd, &rfds))
1919 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1921 * If we are buffering content, we don't want to eat up to
1922 * buffer-limit bytes if the client no longer cares about them.
1923 * If we aren't buffering, however, a dead client socket will be
1924 * noticed pretty much right away anyway, so we can reduce the
1925 * overhead by skipping the check.
1927 if (buffer_and_filter_content && !socket_is_still_alive(csp->cfd))
1930 log_error(LOG_LEVEL_CONNECT,
1931 "The server still wants to talk, but the client may already have hung up on us.");
1933 log_error(LOG_LEVEL_CONNECT,
1934 "The server still wants to talk, but the client hung up on us.");
1935 mark_server_socket_tainted(csp);
1937 #endif /* def _WIN32 */
1939 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1942 len = read_socket(csp->server_connection.sfd, buf, sizeof(buf) - 1);
1946 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1948 if (http->ssl && (fwd->forward_host == NULL))
1951 * Just hang up. We already confirmed the client's CONNECT
1952 * request with status code 200 and unencrypted content is
1953 * no longer welcome.
1955 log_error(LOG_LEVEL_ERROR,
1956 "CONNECT already confirmed. Unable to tell the client about the problem.");
1959 else if (byte_count)
1962 * Just hang up. We already transmitted the original headers
1963 * and parts of the original content and therefore missed the
1964 * chance to send an error message (without risking data corruption).
1966 * XXX: we could retry with a fancy range request here.
1968 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
1969 "Unable to tell the client about the problem.");
1970 mark_server_socket_tainted(csp);
1974 * XXX: Consider handling the cases above the same.
1976 mark_server_socket_tainted(csp);
1980 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1981 if (csp->flags & CSP_FLAG_CHUNKED)
1983 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
1985 /* XXX: this is a temporary hack */
1986 log_error(LOG_LEVEL_CONNECT,
1987 "Looks like we reached the end of the last chunk. "
1988 "We better stop reading.");
1989 csp->expected_content_length = byte_count + (unsigned long long)len;
1990 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
1994 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1997 * Add a trailing zero to let be able to use string operations.
1998 * XXX: do we still need this with filter_popups gone?
2003 * Normally, this would indicate that we've read
2004 * as much as the server has sent us and we can
2005 * close the client connection. However, Microsoft
2006 * in its wisdom has released IIS/5 with a bug that
2007 * prevents it from sending the trailing \r\n in
2008 * a 302 redirect header (and possibly other headers).
2009 * To work around this if we've haven't parsed
2010 * a full header we'll append a trailing \r\n
2011 * and see if this now generates a valid one.
2013 * This hack shouldn't have any impacts. If we've
2014 * already transmitted the header or if this is a
2015 * SSL connection, then we won't bother with this
2016 * hack. So we only work on partially received
2017 * headers. If we append a \r\n and this still
2018 * doesn't generate a valid header, then we won't
2019 * transmit anything to the client.
2024 if (server_body || http->ssl)
2027 * If we have been buffering up the document,
2028 * now is the time to apply content modification
2029 * and send the result to the client.
2031 if (buffer_and_filter_content)
2033 p = execute_content_filters(csp);
2035 * If content filtering fails, use the original
2036 * buffer and length.
2037 * (see p != NULL ? p : csp->iob->cur below)
2041 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2043 #ifdef FEATURE_COMPRESSION
2044 else if ((csp->flags & CSP_FLAG_CLIENT_SUPPORTS_DEFLATE)
2045 && (csp->content_length > LOWER_LENGTH_LIMIT_FOR_COMPRESSION))
2047 char *compressed_content = compress_buffer(p,
2048 (size_t *)&csp->content_length, csp->config->compression_level);
2049 if (compressed_content != NULL)
2052 p = compressed_content;
2053 csp->flags |= CSP_FLAG_BUFFERED_CONTENT_DEFLATED;
2058 if (JB_ERR_OK != update_server_headers(csp))
2060 log_error(LOG_LEVEL_FATAL,
2061 "Failed to update server headers. after filtering.");
2064 hdr = list_to_text(csp->headers);
2067 /* FIXME Should handle error properly */
2068 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2071 if (write_socket(csp->cfd, hdr, strlen(hdr))
2072 || write_socket(csp->cfd,
2073 ((p != NULL) ? p : csp->iob->cur), (size_t)csp->content_length))
2075 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2078 mark_server_socket_tainted(csp);
2086 break; /* "game over, man" */
2090 * This is NOT the body, so
2091 * Let's pretend the server just sent us a blank line.
2093 snprintf(buf, sizeof(buf), "\r\n");
2094 len = (int)strlen(buf);
2097 * Now, let the normal header parsing algorithm below do its
2098 * job. If it fails, we'll exit instead of continuing.
2105 * If this is an SSL connection or we're in the body
2106 * of the server document, just write it to the client,
2107 * unless we need to buffer the body for later content-filtering
2109 if (server_body || http->ssl)
2111 if (buffer_and_filter_content)
2114 * If there is no memory left for buffering the content, or the buffer limit
2115 * has been reached, switch to non-filtering mode, i.e. make & write the
2116 * header, flush the iob and buf, and get out of the way.
2118 if (add_to_iob(csp, buf, len))
2123 log_error(LOG_LEVEL_INFO,
2124 "Flushing header and buffers. Stepping back from filtering.");
2126 hdr = list_to_text(csp->headers);
2130 * Memory is too tight to even generate the header.
2131 * Send our static "Out-of-memory" page.
2133 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2134 rsp = cgi_error_memory();
2135 send_crunch_response(csp, rsp);
2136 mark_server_socket_tainted(csp);
2139 hdrlen = strlen(hdr);
2141 if (write_socket(csp->cfd, hdr, hdrlen)
2142 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2143 || (write_socket(csp->cfd, buf, (size_t)len)))
2145 log_error(LOG_LEVEL_CONNECT,
2146 "Flush header and buffers to client failed: %E");
2148 mark_server_socket_tainted(csp);
2153 * Reset the byte_count to the amount of bytes
2154 * we just flushed. len will be added a few lines below,
2155 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2157 byte_count = (unsigned long long)flushed;
2159 buffer_and_filter_content = 0;
2165 if (write_socket(csp->cfd, buf, (size_t)len))
2167 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2168 mark_server_socket_tainted(csp);
2172 byte_count += (unsigned long long)len;
2178 * We're still looking for the end of the server's header.
2179 * Buffer up the data we just read. If that fails, there's
2180 * little we can do but send our static out-of-memory page.
2182 if (add_to_iob(csp, buf, len))
2184 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2185 rsp = cgi_error_memory();
2186 send_crunch_response(csp, rsp);
2187 mark_server_socket_tainted(csp);
2191 /* Convert iob into something sed() can digest */
2192 if (JB_ERR_PARSE == get_server_headers(csp))
2197 * Well, we tried our MS IIS/5 hack and it didn't work.
2198 * The header is incomplete and there isn't anything
2199 * we can do about it.
2201 log_error(LOG_LEVEL_ERROR, "Invalid server headers. "
2202 "Applying the MS IIS5 hack didn't help.");
2203 log_error(LOG_LEVEL_CLF,
2204 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2205 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2206 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2207 mark_server_socket_tainted(csp);
2213 * Since we have to wait for more from the server before
2214 * we can parse the headers we just continue here.
2216 log_error(LOG_LEVEL_CONNECT,
2217 "Continuing buffering headers. Bytes most recently read: %d.",
2225 * Account for the content bytes we
2226 * might have gotten with the headers.
2228 assert(csp->iob->eod >= csp->iob->cur);
2229 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
2232 /* Did we actually get anything? */
2233 if (NULL == csp->headers->first)
2235 if ((csp->flags & CSP_FLAG_REUSED_CLIENT_CONNECTION))
2237 log_error(LOG_LEVEL_ERROR,
2238 "No server or forwarder response received on socket %d. "
2239 "Closing client socket %d without sending data.",
2240 csp->server_connection.sfd, csp->cfd);
2241 log_error(LOG_LEVEL_CLF,
2242 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2246 log_error(LOG_LEVEL_ERROR,
2247 "No server or forwarder response received on socket %d.",
2248 csp->server_connection.sfd);
2249 send_crunch_response(csp, error_response(csp, "no-server-data"));
2251 free_http_request(http);
2252 mark_server_socket_tainted(csp);
2256 assert(csp->headers->first->str);
2258 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
2259 strncmpic(csp->headers->first->str, "ICY", 3))
2262 * It doesn't look like a HTTP (or Shoutcast) response:
2263 * tell the client and log the problem.
2265 if (strlen(csp->headers->first->str) > 30)
2267 csp->headers->first->str[30] = '\0';
2269 log_error(LOG_LEVEL_ERROR,
2270 "Invalid server or forwarder response. Starts with: %s",
2271 csp->headers->first->str);
2272 log_error(LOG_LEVEL_CLF,
2273 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2274 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2275 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2276 free_http_request(http);
2277 mark_server_socket_tainted(csp);
2282 * We have now received the entire server header,
2283 * filter it and send the result to the client
2285 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
2287 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2289 hdr = list_to_text(csp->headers);
2292 /* FIXME Should handle error properly */
2293 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2296 if ((csp->flags & CSP_FLAG_CHUNKED)
2297 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2298 && ((csp->iob->eod - csp->iob->cur) >= 5)
2299 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
2301 log_error(LOG_LEVEL_CONNECT,
2302 "Looks like we got the last chunk together with "
2303 "the server headers. We better stop reading.");
2304 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
2305 csp->expected_content_length = byte_count;
2306 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2309 csp->server_connection.response_received = time(NULL);
2311 if (crunch_response_triggered(csp, crunchers_light))
2314 * One of the tags created by a server-header
2315 * tagger triggered a crunch. We already
2316 * delivered the crunch response to the client
2317 * and are done here after cleaning up.
2320 mark_server_socket_tainted(csp);
2323 /* Buffer and pcrs filter this if appropriate. */
2325 if (!http->ssl) /* We talk plaintext */
2327 buffer_and_filter_content = content_requires_filtering(csp);
2330 * Only write if we're not buffering for content modification
2332 if (!buffer_and_filter_content)
2335 * Write the server's (modified) header to
2336 * the client (along with anything else that
2337 * may be in the buffer)
2340 if (write_socket(csp->cfd, hdr, strlen(hdr))
2341 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
2343 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2346 * The write failed, so don't bother mentioning it
2347 * to the client... it probably can't hear us anyway.
2350 mark_server_socket_tainted(csp);
2355 /* we're finished with the server's header */
2361 * If this was a MS IIS/5 hack then it means the server
2362 * has already closed the connection. Nothing more to read.
2367 log_error(LOG_LEVEL_ERROR,
2368 "Closed server connection detected. "
2369 "Applying the MS IIS5 hack didn't help.");
2370 log_error(LOG_LEVEL_CLF,
2371 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2372 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2373 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2374 mark_server_socket_tainted(csp);
2380 mark_server_socket_tainted(csp);
2381 return; /* huh? we should never get here */
2384 if (csp->content_length == 0)
2387 * If Privoxy didn't recalculate the Content-Length,
2388 * byte_count is still correct.
2390 csp->content_length = byte_count;
2393 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2394 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2395 && (csp->expected_content_length != byte_count))
2397 log_error(LOG_LEVEL_CONNECT,
2398 "Received %llu bytes while expecting %llu.",
2399 byte_count, csp->expected_content_length);
2400 mark_server_socket_tainted(csp);
2404 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
2405 csp->ip_addr_str, http->ocmd, csp->content_length);
2407 csp->server_connection.timestamp = time(NULL);
2411 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2412 /*********************************************************************
2414 * Function : prepare_csp_for_next_request
2416 * Description : Put the csp in a mostly vergin state.
2419 * 1 : csp = Current client state (buffers, headers, etc...)
2423 *********************************************************************/
2424 static void prepare_csp_for_next_request(struct client_state *csp)
2426 unsigned int toggled_on_flag_set = (0 != (csp->flags & CSP_FLAG_TOGGLED_ON));
2428 csp->content_type = 0;
2429 csp->content_length = 0;
2430 csp->expected_content_length = 0;
2431 csp->expected_client_content_length = 0;
2432 list_remove_all(csp->headers);
2433 freez(csp->iob->buf);
2434 memset(csp->iob, 0, sizeof(csp->iob));
2435 freez(csp->error_message);
2436 free_http_request(csp->http);
2437 destroy_list(csp->headers);
2438 destroy_list(csp->tags);
2439 free_current_action(csp->action);
2440 if (NULL != csp->fwd)
2442 unload_forward_spec(csp->fwd);
2445 /* XXX: Store per-connection flags someplace else. */
2446 csp->flags = (CSP_FLAG_ACTIVE | CSP_FLAG_REUSED_CLIENT_CONNECTION);
2447 if (toggled_on_flag_set)
2449 csp->flags |= CSP_FLAG_TOGGLED_ON;
2452 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2455 /*********************************************************************
2459 * Description : This is little more than chat. We only "serve" to
2460 * to close (or remember) any socket that chat may have
2464 * 1 : csp = Current client state (buffers, headers, etc...)
2468 *********************************************************************/
2470 void serve(struct client_state *csp)
2471 #else /* ifndef AMIGA */
2472 static void serve(struct client_state *csp)
2473 #endif /* def AMIGA */
2475 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2476 #ifdef FEATURE_CONNECTION_SHARING
2477 static int monitor_thread_running = 0;
2478 #endif /* def FEATURE_CONNECTION_SHARING */
2479 int continue_chatting = 0;
2483 unsigned int latency;
2484 int config_file_change_detected = 0; /* Only used for debugging */
2489 * If the request has been crunched,
2490 * the calculated latency is zero.
2492 latency = (unsigned)(csp->server_connection.response_received -
2493 csp->server_connection.request_sent) / 2;
2495 continue_chatting = (csp->config->feature_flags
2496 & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
2497 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
2498 && ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
2499 || (csp->flags & CSP_FLAG_CRUNCHED))
2500 && (csp->cfd != JB_INVALID_SOCKET)
2501 && ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
2502 || (csp->config->feature_flags &
2503 RUNTIME_FEATURE_CONNECTION_SHARING));
2505 if (continue_chatting && !(csp->flags & CSP_FLAG_CRUNCHED))
2507 continue_chatting = (csp->server_connection.sfd != JB_INVALID_SOCKET)
2508 && socket_is_still_alive(csp->server_connection.sfd);
2509 if (continue_chatting)
2511 if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
2513 csp->server_connection.keep_alive_timeout = csp->config->default_server_timeout;
2514 log_error(LOG_LEVEL_CONNECT,
2515 "The server didn't specify how long the connection will stay open. "
2516 "Assumed timeout is: %u.", csp->server_connection.keep_alive_timeout);
2518 continue_chatting = (latency < csp->server_connection.keep_alive_timeout);
2522 if (continue_chatting && any_loaded_file_changed(csp->config->config_file_list))
2524 continue_chatting = 0;
2525 config_file_change_detected = 1;
2528 if (continue_chatting)
2530 unsigned int client_timeout = 1; /* XXX: Use something else here? */
2532 if (0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE))
2534 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2536 client_timeout = (unsigned)csp->server_connection.keep_alive_timeout - latency;
2537 log_error(LOG_LEVEL_CONNECT,
2538 "Waiting for the next client request on socket %d. "
2539 "Keeping the server socket %d to %s open.",
2540 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
2544 log_error(LOG_LEVEL_CONNECT,
2545 "Waiting for the next client request on socket %d. "
2546 "No server socket to keep open.", csp->cfd);
2549 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
2550 && data_is_available(csp->cfd, (int)client_timeout)
2551 && socket_is_still_alive(csp->cfd))
2553 log_error(LOG_LEVEL_CONNECT,
2554 "Client request arrived in time on socket %d.", csp->cfd);
2555 prepare_csp_for_next_request(csp);
2559 if (0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE))
2561 log_error(LOG_LEVEL_CONNECT,
2562 "No additional client request received in time on socket %d.",
2565 #ifdef FEATURE_CONNECTION_SHARING
2566 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
2567 && (socket_is_still_alive(csp->server_connection.sfd)))
2569 time_t time_open = time(NULL) - csp->server_connection.timestamp;
2571 if (csp->server_connection.keep_alive_timeout < time_open - (time_t)latency)
2576 remember_connection(&csp->server_connection);
2577 csp->server_connection.sfd = JB_INVALID_SOCKET;
2578 close_socket(csp->cfd);
2579 csp->cfd = JB_INVALID_SOCKET;
2580 privoxy_mutex_lock(&connection_reuse_mutex);
2581 if (!monitor_thread_running)
2583 monitor_thread_running = 1;
2584 privoxy_mutex_unlock(&connection_reuse_mutex);
2585 wait_for_alive_connections();
2586 privoxy_mutex_lock(&connection_reuse_mutex);
2587 monitor_thread_running = 0;
2589 privoxy_mutex_unlock(&connection_reuse_mutex);
2591 #endif /* def FEATURE_CONNECTION_SHARING */
2595 else if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2597 log_error(LOG_LEVEL_CONNECT,
2598 "The connection on server socket %d to %s isn't reusable. Closing. "
2599 "Server connection: keep-alive %u, tainted: %u, socket alive %u. "
2600 "Client connection: socket alive: %u. Server timeout: %u. "
2601 "Configuration file change detected: %u",
2602 csp->server_connection.sfd, csp->server_connection.host,
2603 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
2604 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
2605 socket_is_still_alive(csp->server_connection.sfd),
2606 socket_is_still_alive(csp->cfd),
2607 csp->server_connection.keep_alive_timeout,
2608 config_file_change_detected);
2610 } while (continue_chatting);
2614 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2616 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2618 #ifdef FEATURE_CONNECTION_SHARING
2619 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
2621 forget_connection(csp->server_connection.sfd);
2623 #endif /* def FEATURE_CONNECTION_SHARING */
2624 close_socket(csp->server_connection.sfd);
2627 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2628 mark_connection_closed(&csp->server_connection);
2631 if (csp->cfd != JB_INVALID_SOCKET)
2633 close_socket(csp->cfd);
2636 csp->flags &= ~CSP_FLAG_ACTIVE;
2642 /*********************************************************************
2644 * Function : server_thread
2646 * Description : We only exist to call `serve' in a threaded environment.
2649 * 1 : data = Current client state (buffers, headers, etc...)
2651 * Returns : Always 0.
2653 *********************************************************************/
2654 static int32 server_thread(void *data)
2656 serve((struct client_state *) data);
2663 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2664 /*********************************************************************
2668 * Description : Print usage info & exit.
2670 * Parameters : Pointer to argv[0] for identifying ourselves
2674 *********************************************************************/
2675 static void usage(const char *myname)
2677 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2681 #endif /* defined(unix) */
2684 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
2685 #endif /* defined(unix) */
2686 "[--version] [configfile]\n"
2687 "Aborting\n", myname);
2692 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
2695 #ifdef MUTEX_LOCKS_AVAILABLE
2696 /*********************************************************************
2698 * Function : privoxy_mutex_lock
2700 * Description : Locks a mutex.
2703 * 1 : mutex = The mutex to lock.
2705 * Returns : Void. May exit in case of errors.
2707 *********************************************************************/
2708 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
2710 #ifdef FEATURE_PTHREAD
2711 int err = pthread_mutex_lock(mutex);
2714 if (mutex != &log_mutex)
2716 log_error(LOG_LEVEL_FATAL,
2717 "Mutex locking failed: %s.\n", strerror(err));
2722 EnterCriticalSection(mutex);
2723 #endif /* def FEATURE_PTHREAD */
2727 /*********************************************************************
2729 * Function : privoxy_mutex_unlock
2731 * Description : Unlocks a mutex.
2734 * 1 : mutex = The mutex to unlock.
2736 * Returns : Void. May exit in case of errors.
2738 *********************************************************************/
2739 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
2741 #ifdef FEATURE_PTHREAD
2742 int err = pthread_mutex_unlock(mutex);
2745 if (mutex != &log_mutex)
2747 log_error(LOG_LEVEL_FATAL,
2748 "Mutex unlocking failed: %s.\n", strerror(err));
2753 LeaveCriticalSection(mutex);
2754 #endif /* def FEATURE_PTHREAD */
2758 /*********************************************************************
2760 * Function : privoxy_mutex_init
2762 * Description : Prepares a mutex.
2765 * 1 : mutex = The mutex to initialize.
2767 * Returns : Void. May exit in case of errors.
2769 *********************************************************************/
2770 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
2772 #ifdef FEATURE_PTHREAD
2773 int err = pthread_mutex_init(mutex, 0);
2776 printf("Fatal error. Mutex initialization failed: %s.\n",
2781 InitializeCriticalSection(mutex);
2782 #endif /* def FEATURE_PTHREAD */
2784 #endif /* def MUTEX_LOCKS_AVAILABLE */
2786 /*********************************************************************
2788 * Function : initialize_mutexes
2790 * Description : Prepares mutexes if mutex support is available.
2794 * Returns : Void, exits in case of errors.
2796 *********************************************************************/
2797 static void initialize_mutexes(void)
2799 #ifdef MUTEX_LOCKS_AVAILABLE
2801 * Prepare global mutex semaphores
2803 privoxy_mutex_init(&log_mutex);
2804 privoxy_mutex_init(&log_init_mutex);
2805 privoxy_mutex_init(&connection_reuse_mutex);
2808 * XXX: The assumptions below are a bit naive
2809 * and can cause locks that aren't necessary.
2811 * For example older FreeBSD versions (< 6.x?)
2812 * have no gethostbyname_r, but gethostbyname is
2815 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
2816 privoxy_mutex_init(&resolver_mutex);
2817 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
2819 * XXX: should we use a single mutex for
2820 * localtime() and gmtime() as well?
2822 #ifndef HAVE_GMTIME_R
2823 privoxy_mutex_init(&gmtime_mutex);
2824 #endif /* ndef HAVE_GMTIME_R */
2826 #ifndef HAVE_LOCALTIME_R
2827 privoxy_mutex_init(&localtime_mutex);
2828 #endif /* ndef HAVE_GMTIME_R */
2831 privoxy_mutex_init(&rand_mutex);
2832 #endif /* ndef HAVE_RANDOM */
2834 #endif /* def MUTEX_LOCKS_AVAILABLE */
2838 /*********************************************************************
2842 * Description : Load the config file and start the listen loop.
2843 * This function is a lot more *sane* with the `load_config'
2844 * and `listen_loop' functions; although it stills does
2845 * a *little* too much for my taste.
2848 * 1 : argc = Number of parameters (including $0).
2849 * 2 : argv = Array of (char *)'s to the parameters.
2851 * Returns : 1 if : can't open config file, unrecognized directive,
2852 * stats requested in multi-thread mode, can't open the
2853 * log file, can't open the jar file, listen port is invalid,
2854 * any load fails, and can't bind port.
2856 * Else main never returns, the process must be signaled
2857 * to terminate execution. Or, on Windows, use the
2858 * "File", "Exit" menu option.
2860 *********************************************************************/
2862 int real_main(int argc, char **argv)
2864 int main(int argc, char **argv)
2868 unsigned int random_seed;
2870 struct passwd *pw = NULL;
2871 struct group *grp = NULL;
2873 char *pre_chroot_nslookup_to_load_resolver = NULL;
2880 #if !defined(_WIN32)
2887 /* Prepare mutexes if supported and necessary. */
2888 initialize_mutexes();
2890 /* Enable logging until further notice. */
2894 * Parse the command line arguments
2896 * XXX: simply printing usage information in case of
2897 * invalid arguments isn't particularly user friendly.
2899 while (++argc_pos < argc)
2902 /* Check to see if the service must be installed or uninstalled */
2903 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2905 const char *pName = argv[argc_pos] + 9;
2908 exit((install_service(pName)) ? 0 : 1);
2910 else if (strncmp(argv[argc_pos], "--uninstall", 11) == 0)
2912 const char *pName = argv[argc_pos] + 11;
2915 exit((uninstall_service(pName)) ? 0 : 1);
2917 else if (strcmp(argv[argc_pos], "--service") == 0)
2919 bRunAsService = TRUE;
2920 w32_set_service_cwd();
2921 atexit(w32_service_exit_notify);
2924 #endif /* defined(_WIN32) */
2927 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2929 if (strcmp(argv[argc_pos], "--help") == 0)
2934 else if (strcmp(argv[argc_pos], "--version") == 0)
2936 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2942 else if (strcmp(argv[argc_pos], "--no-daemon") == 0)
2944 set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
2948 else if (strcmp(argv[argc_pos], "--pidfile") == 0)
2950 if (++argc_pos == argc) usage(argv[0]);
2951 pidfile = strdup_or_die(argv[argc_pos]);
2954 else if (strcmp(argv[argc_pos], "--user") == 0)
2959 if (++argc_pos == argc) usage(argv[argc_pos]);
2961 user_arg = strdup_or_die(argv[argc_pos]);
2962 group_name = strchr(user_arg, '.');
2963 if (NULL != group_name)
2965 /* Nul-terminate the user name */
2968 /* Skip the former delimiter to actually reach the group name */
2971 grp = getgrnam(group_name);
2974 log_error(LOG_LEVEL_FATAL, "Group '%s' not found.", group_name);
2977 pw = getpwnam(user_arg);
2980 log_error(LOG_LEVEL_FATAL, "User '%s' not found.", user_arg);
2986 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup") == 0)
2988 if (++argc_pos == argc) usage(argv[0]);
2989 pre_chroot_nslookup_to_load_resolver = strdup_or_die(argv[argc_pos]);
2992 else if (strcmp(argv[argc_pos], "--chroot") == 0)
2996 #endif /* defined(unix) */
2998 else if (argc_pos + 1 != argc)
3001 * This is neither the last command line
3002 * option, nor was it recognized before,
3003 * therefore it must be invalid.
3009 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3011 configfile = argv[argc_pos];
3014 } /* -END- while (more arguments) */
3016 show_version(Argv[0]);
3019 if (*configfile != '/')
3021 char cwd[BUFFER_SIZE];
3023 size_t abs_file_size;
3025 /* make config-filename absolute here */
3026 if (NULL == getcwd(cwd, sizeof(cwd)))
3028 perror("failed to get current working directory");
3032 basedir = strdup_or_die(cwd);
3034 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3035 abs_file = malloc_or_die(abs_file_size);
3036 strlcpy(abs_file, basedir, abs_file_size);
3037 strlcat(abs_file, "/", abs_file_size);
3038 strlcat(abs_file, configfile, abs_file_size);
3039 configfile = abs_file;
3041 #endif /* defined unix */
3045 clients->next = NULL;
3047 /* XXX: factor out initialising after the next stable release. */
3050 #elif defined(_WIN32)
3054 random_seed = (unsigned int)time(NULL);
3056 srandom(random_seed);
3059 #endif /* ifdef HAVE_RANDOM */
3062 * Unix signal handling
3064 * Catch the abort, interrupt and terminate signals for a graceful exit
3065 * Catch the hangup signal so the errlog can be reopened.
3066 * Ignore the broken pipe signals (FIXME: Why?)
3068 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3071 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP };
3073 for (idx = 0; idx < SZ(catched_signals); idx++)
3075 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3076 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3078 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3079 #endif /* ifdef sun */
3081 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3085 if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
3087 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for SIGPIPE: %E");
3091 #else /* ifdef _WIN32 */
3092 # ifdef _WIN_CONSOLE
3094 * We *are* in a windows console app.
3095 * Print a verbose messages about FAQ's and such
3097 printf("%s", win32_blurb);
3098 # endif /* def _WIN_CONSOLE */
3099 #endif /* def _WIN32 */
3102 /* Initialize the CGI subsystem */
3103 cgi_init_error_messages();
3106 * If runnig on unix and without the --nodaemon
3107 * option, become a daemon. I.e. fork, detach
3108 * from tty and get process group leadership
3117 if (pid < 0) /* error */
3122 else if (pid != 0) /* parent */
3127 * must check for errors
3128 * child died due to missing files aso
3131 wpid = waitpid(pid, &status, WNOHANG);
3143 * stderr (fd 2) will be closed later on,
3144 * when the config file has been parsed.
3150 * Reserve fd 0 and 1 to prevent abort() and friends
3151 * from sending stuff to the clients or servers.
3153 fd = open("/dev/null", O_RDONLY);
3156 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
3160 if (dup2(fd, 0) == -1)
3162 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 0: %E");
3166 fd = open("/dev/null", O_WRONLY);
3169 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
3173 if (dup2(fd, 1) == -1)
3175 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 1: %E");
3182 } /* -END- if (daemon_mode) */
3185 * As soon as we have written the PID file, we can switch
3186 * to the user and group ID indicated by the --user option
3192 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3194 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3196 if ((NULL != grp) && setgroups(1, &grp->gr_gid))
3198 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
3200 else if (initgroups(pw->pw_name, pw->pw_gid))
3202 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
3208 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3210 /* Read the time zone file from /etc before doing chroot. */
3212 if (NULL != pre_chroot_nslookup_to_load_resolver
3213 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3215 /* Initialize resolver library. */
3216 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3218 if (chroot(pw->pw_dir) < 0)
3220 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3224 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3227 if (setuid(pw->pw_uid))
3229 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3233 char putenv_dummy[64];
3235 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3236 if (putenv(putenv_dummy) != 0)
3238 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3241 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3242 if (putenv(putenv_dummy) != 0)
3244 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3250 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3253 #endif /* defined unix */
3256 /* This will be FALSE unless the command line specified --service
3260 /* Yup, so now we must attempt to establish a connection
3261 * with the service dispatcher. This will only work if this
3262 * process was launched by the service control manager to
3263 * actually run as a service. If this isn't the case, i've
3264 * known it take around 30 seconds or so for the call to return.
3267 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3268 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3270 /* Service has run, and at this point is now being stopped, so just return */
3275 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3277 /* An error occurred. Usually it's because --service was wrongly specified
3278 * and we were unable to connect to the Service Control Dispatcher because
3279 * it wasn't expecting us and is therefore not listening.
3281 * For now, just continue below to call the listen_loop function.
3284 #endif /* def _WIN32 */
3294 /*********************************************************************
3296 * Function : bind_port_helper
3298 * Description : Bind the listen port. Handles logging, and aborts
3302 * 1 : haddr = Host addres to bind to. Use NULL to bind to
3304 * 2 : hport = Specifies port to bind to.
3306 * Returns : Port that was opened.
3308 *********************************************************************/
3309 static jb_socket bind_port_helper(const char *haddr, int hport)
3314 result = bind_port(haddr, hport, &bfd);
3318 const char *bind_address = (NULL != haddr) ? haddr : "INADDR_ANY";
3322 log_error(LOG_LEVEL_FATAL,
3323 "can't bind to %s:%d: There may be another Privoxy "
3324 "or some other proxy running on port %d",
3325 bind_address, hport, hport);
3328 log_error(LOG_LEVEL_FATAL,
3329 "can't bind to %s:%d: The hostname is not resolvable",
3330 bind_address, hport);
3333 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: %E",
3334 bind_address, hport);
3337 /* shouldn't get here */
3338 return JB_INVALID_SOCKET;
3343 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3348 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3356 /*********************************************************************
3358 * Function : bind_ports_helper
3360 * Description : Bind the listen ports. Handles logging, and aborts
3364 * 1 : config = Privoxy configuration. Specifies ports
3366 * 2 : sockets = Preallocated array of opened sockets
3367 * corresponding to specification in config.
3368 * All non-opened sockets will be set to
3369 * JB_INVALID_SOCKET.
3371 * Returns : Nothing. Inspect sockets argument.
3373 *********************************************************************/
3374 static void bind_ports_helper(struct configuration_spec * config,
3375 jb_socket sockets[])
3379 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
3381 if (config->hport[i])
3383 sockets[i] = bind_port_helper(config->haddr[i], config->hport[i]);
3387 sockets[i] = JB_INVALID_SOCKET;
3390 config->need_bind = 0;
3394 /*********************************************************************
3396 * Function : close_ports_helper
3398 * Description : Close listenings ports.
3401 * 1 : sockets = Array of opened and non-opened sockets to
3402 * close. All sockets will be set to
3403 * JB_INVALID_SOCKET.
3405 * Returns : Nothing.
3407 *********************************************************************/
3408 static void close_ports_helper(jb_socket sockets[])
3412 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
3414 if (JB_INVALID_SOCKET != sockets[i])
3416 close_socket(sockets[i]);
3418 sockets[i] = JB_INVALID_SOCKET;
3424 /* Without this simple workaround we get this compiler warning from _beginthread
3425 * warning C4028: formal parameter 1 different from declaration
3427 void w32_service_listen_loop(void *p)
3431 #endif /* def _WIN32 */
3434 /*********************************************************************
3436 * Function : listen_loop
3438 * Description : bind the listen port and enter a "FOREVER" listening loop.
3444 *********************************************************************/
3445 static void listen_loop(void)
3447 struct client_states *csp_list = NULL;
3448 struct client_state *csp = NULL;
3449 jb_socket bfds[MAX_LISTENING_SOCKETS];
3450 struct configuration_spec *config;
3451 unsigned int active_threads = 0;
3453 config = load_config();
3455 #ifdef FEATURE_CONNECTION_SHARING
3457 * XXX: Should be relocated once it no
3458 * longer needs to emit log messages.
3460 initialize_reusable_connections();
3461 #endif /* def FEATURE_CONNECTION_SHARING */
3463 bind_ports_helper(config, bfds);
3465 #ifdef FEATURE_GRACEFUL_TERMINATION
3466 while (!g_terminate)
3471 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3472 while (waitpid(-1, NULL, WNOHANG) > 0)
3474 /* zombie children */
3476 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3479 * Free data that was used by died threads
3481 active_threads = sweep();
3485 * Re-open the errlog after HUP signal
3487 if (received_hup_signal)
3489 if (NULL != config->logfile)
3491 init_error_log(Argv[0], config->logfile);
3493 received_hup_signal = 0;
3497 csp_list = (struct client_states *)zalloc(sizeof(*csp_list));
3498 if (NULL == csp_list)
3500 log_error(LOG_LEVEL_FATAL,
3501 "malloc(%d) for csp_list failed: %E", sizeof(*csp_list));
3504 csp = &csp_list->csp;
3506 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3508 if (!accept_connection(csp, bfds))
3510 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3523 log_error(LOG_LEVEL_CONNECT,
3524 "accepted connection from %s on socket %d",
3525 csp->ip_addr_str, csp->cfd);
3528 csp->flags |= CSP_FLAG_ACTIVE;
3529 csp->server_connection.sfd = JB_INVALID_SOCKET;
3531 csp->config = config = load_config();
3533 if (config->need_bind)
3536 * Since we were listening to the "old port", we will not see
3537 * a "listen" param change until the next request. So, at
3538 * least 1 more request must be made for us to find the new
3539 * setting. I am simply closing the old socket and binding the
3542 * Which-ever is correct, we will serve 1 more page via the
3543 * old settings. This should probably be a "show-proxy-args"
3544 * request. This should not be a so common of an operation
3545 * that this will hurt people's feelings.
3548 close_ports_helper(bfds);
3550 bind_ports_helper(config, bfds);
3553 #ifdef FEATURE_TOGGLE
3554 if (global_toggle_state)
3555 #endif /* def FEATURE_TOGGLE */
3557 csp->flags |= CSP_FLAG_TOGGLED_ON;
3560 if (run_loader(csp))
3562 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3563 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3567 if (block_acl(NULL,csp))
3569 log_error(LOG_LEVEL_CONNECT,
3570 "Connection from %s on socket %d dropped due to ACL", csp->ip_addr_str, csp->cfd);
3571 close_socket(csp->cfd);
3572 freez(csp->ip_addr_str);
3576 #endif /* def FEATURE_ACL */
3578 if ((0 != config->max_client_connections)
3579 && (active_threads >= config->max_client_connections))
3581 log_error(LOG_LEVEL_CONNECT,
3582 "Rejecting connection from %s. Maximum number of connections reached.",
3584 write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
3585 strlen(TOO_MANY_CONNECTIONS_RESPONSE));
3586 close_socket(csp->cfd);
3587 freez(csp->ip_addr_str);
3592 /* add it to the list of clients */
3593 csp_list->next = clients->next;
3594 clients->next = csp_list;
3596 if (config->multi_threaded)
3600 /* this is a switch () statement in the C preprocessor - ugh */
3601 #undef SELECTED_ONE_OPTION
3603 /* Use Pthreads in preference to native code */
3604 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3605 #define SELECTED_ONE_OPTION
3607 pthread_t the_thread;
3608 pthread_attr_t attrs;
3610 pthread_attr_init(&attrs);
3611 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3612 errno = pthread_create(&the_thread, &attrs,
3613 (void * (*)(void *))serve, csp);
3614 child_id = errno ? -1 : 0;
3615 pthread_attr_destroy(&attrs);
3619 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3620 #define SELECTED_ONE_OPTION
3621 child_id = _beginthread(
3622 (void (*)(void *))serve,
3627 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3628 #define SELECTED_ONE_OPTION
3629 child_id = _beginthread(
3630 (void(* _Optlink)(void*))serve,
3636 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3637 #define SELECTED_ONE_OPTION
3639 thread_id tid = spawn_thread
3640 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3642 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3644 child_id = (int) tid;
3653 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3654 #define SELECTED_ONE_OPTION
3655 csp->cfd = ReleaseSocket(csp->cfd, -1);
3658 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3659 NP_Output, Output(),
3660 NP_CloseOutput, FALSE,
3661 NP_Name, (ULONG)"privoxy child",
3665 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3666 NP_Output, Output(),
3667 NP_CloseOutput, FALSE,
3668 NP_Name, (ULONG)"privoxy child",
3669 NP_StackSize, 200*1024,
3675 ((struct Task *)child_id)->tc_UserData = csp;
3676 Signal((struct Task *)child_id, SIGF_SINGLE);
3681 #if !defined(SELECTED_ONE_OPTION)
3684 /* This block is only needed when using fork().
3685 * When using threads, the server thread was
3686 * created and run by the call to _beginthread().
3688 if (child_id == 0) /* child */
3691 #ifdef FEATURE_TOGGLE
3692 int inherited_toggle_state = global_toggle_state;
3693 #endif /* def FEATURE_TOGGLE */
3698 * If we've been toggled or we've blocked the request, tell Mom
3701 #ifdef FEATURE_TOGGLE
3702 if (inherited_toggle_state != global_toggle_state)
3704 rc |= RC_FLAG_TOGGLED;
3706 #endif /* def FEATURE_TOGGLE */
3708 #ifdef FEATURE_STATISTICS
3709 if (csp->flags & CSP_FLAG_REJECTED)
3711 rc |= RC_FLAG_BLOCKED;
3713 #endif /* ndef FEATURE_STATISTICS */
3717 else if (child_id > 0) /* parent */
3719 /* in a fork()'d environment, the parent's
3720 * copy of the client socket and the CSP
3724 #if !defined(_WIN32) && !defined(__CYGWIN__)
3726 wait(&child_status);
3729 * Evaluate child's return code: If the child has
3730 * - been toggled, toggle ourselves
3731 * - blocked its request, bump up the stats counter
3734 #ifdef FEATURE_TOGGLE
3735 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
3737 global_toggle_state = !global_toggle_state;
3739 #endif /* def FEATURE_TOGGLE */
3741 #ifdef FEATURE_STATISTICS
3743 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
3747 #endif /* def FEATURE_STATISTICS */
3749 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
3750 close_socket(csp->cfd);
3751 csp->flags &= ~CSP_FLAG_ACTIVE;
3755 #undef SELECTED_ONE_OPTION
3756 /* end of cpp switch () */
3761 * Spawning the child failed, assume it's because
3762 * there are too many children running already.
3763 * XXX: If you assume ...
3765 log_error(LOG_LEVEL_ERROR,
3766 "Unable to take any additional connections: %E");
3767 write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
3768 strlen(TOO_MANY_CONNECTIONS_RESPONSE));
3769 close_socket(csp->cfd);
3770 csp->flags &= ~CSP_FLAG_ACTIVE;
3779 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
3781 /* Clean up. Aim: free all memory (no leaks) */
3782 #ifdef FEATURE_GRACEFUL_TERMINATION
3784 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
3786 unload_current_config_file();
3787 unload_current_actions_file();
3788 unload_current_re_filterfile();
3789 #ifdef FEATURE_TRUST
3790 unload_current_trust_file();
3793 if (config->multi_threaded)
3800 } while ((clients->next != NULL) && (--i > 0));
3804 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
3814 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
3815 /* Cleanup - remove taskbar icon etc. */
3820 #endif /* FEATURE_GRACEFUL_TERMINATION */