1 /*********************************************************************
3 * File : $Source: /cvsroot/ijbswa/current/jcc.c,v $
5 * Purpose : Main file. Contains main() method, main loop, and
6 * the main connection-handling function.
8 * Copyright : Written by and Copyright (C) 2001-2022 the
9 * Privoxy team. https://www.privoxy.org/
11 * Based on the Internet Junkbuster originally written
12 * by and Copyright (C) 1997 Anonymous Coders and
13 * Junkbusters Corporation. http://www.junkbusters.com
15 * This program is free software; you can redistribute it
16 * and/or modify it under the terms of the GNU General
17 * Public License as published by the Free Software
18 * Foundation; either version 2 of the License, or (at
19 * your option) any later version.
21 * This program is distributed in the hope that it will
22 * be useful, but WITHOUT ANY WARRANTY; without even the
23 * implied warranty of MERCHANTABILITY or FITNESS FOR A
24 * PARTICULAR PURPOSE. See the GNU General Public
25 * License for more details.
27 * The GNU General Public License should be included with
28 * this file. If not, you can view it at
29 * http://www.gnu.org/copyleft/gpl.html
30 * or write to the Free Software Foundation, Inc., 59
31 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
33 *********************************************************************/
39 #include <sys/types.h>
48 # ifndef FEATURE_PTHREAD
52 # include <winsock2.h>
55 # endif /* ndef FEATURE_PTHREAD */
60 # endif /* ndef _WIN_CONSOLE */
61 # include "w32svrapi.h"
63 #else /* ifndef _WIN32 */
66 # include <sys/wait.h>
67 # include <sys/time.h>
68 # include <sys/stat.h>
69 # include <sys/ioctl.h>
72 #include <sys/termios.h>
83 # include <socket.h> /* BeOS has select() for sockets only. */
84 # include <OS.h> /* declarations for threads and stuff. */
92 #endif /* def __GLIBC__ */
97 #warning poll() appears to be unavailable. Your platform will become unsupported in the future.
98 #endif /* HAVE_POLL */
105 #ifdef FEATURE_HTTPS_INSPECTION
111 #include "miscutil.h"
113 #include "jbsockets.h"
118 #include "urlmatch.h"
119 #ifdef FEATURE_CLIENT_TAGS
120 #include "client-tags.h"
124 struct client_states clients[1];
125 struct file_list files[1];
127 #ifdef FEATURE_STATISTICS
128 int urls_read = 0; /* total nr of urls read inc rejected */
129 int urls_rejected = 0; /* total nr of urls rejected */
130 #ifdef MUTEX_LOCKS_AVAILABLE
131 unsigned long long number_of_requests_received = 0;
132 unsigned long long number_of_requests_blocked = 0;
134 #endif /* def FEATURE_STATISTICS */
136 #ifdef FEATURE_GRACEFUL_TERMINATION
141 static void sig_handler(int the_signal);
143 static int client_protocol_is_unsupported(struct client_state *csp, char *req);
144 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
145 static jb_err get_server_headers(struct client_state *csp);
146 static const char *crunch_reason(const struct http_response *rsp);
147 static void send_crunch_response(struct client_state *csp, struct http_response *rsp);
148 static char *get_request_line(struct client_state *csp);
149 static jb_err receive_client_request(struct client_state *csp);
150 static jb_err parse_client_request(struct client_state *csp);
151 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
152 static jb_err change_request_destination(struct client_state *csp);
153 static void handle_established_connection(struct client_state *csp);
154 static void chat(struct client_state *csp);
155 static void serve(struct client_state *csp);
156 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
157 static void usage(const char *myname);
159 static void initialize_mutexes(void);
160 static jb_socket bind_port_helper(const char *haddr, int hport, int backlog);
161 static void bind_ports_helper(struct configuration_spec *config, jb_socket sockets[]);
162 static void close_ports_helper(jb_socket sockets[]);
163 static void listen_loop(void);
164 static void serve(struct client_state *csp);
167 static int32 server_thread(void *data);
168 #endif /* def __BEOS__ */
171 #define sleep(N) Sleep(((N) * 1000))
175 int process_fuzzed_input(char *fuzz_input_type, char *fuzz_input_file);
176 void show_fuzz_usage(const char *name);
179 #ifdef MUTEX_LOCKS_AVAILABLE
181 * XXX: Does the locking stuff really belong in this file?
183 privoxy_mutex_t log_mutex;
184 privoxy_mutex_t log_init_mutex;
185 privoxy_mutex_t connection_reuse_mutex;
187 #ifdef FEATURE_HTTPS_INSPECTION
188 privoxy_mutex_t certificate_mutex;
189 privoxy_mutex_t ssl_init_mutex;
192 #ifdef FEATURE_EXTERNAL_FILTERS
193 privoxy_mutex_t external_filter_mutex;
195 #ifdef FEATURE_CLIENT_TAGS
196 privoxy_mutex_t client_tags_mutex;
198 #ifdef FEATURE_STATISTICS
199 privoxy_mutex_t block_statistics_mutex;
201 #ifdef FEATURE_EXTENDED_STATISTICS
202 privoxy_mutex_t filter_statistics_mutex;
203 privoxy_mutex_t block_reason_statistics_mutex;
206 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
207 privoxy_mutex_t resolver_mutex;
208 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
210 #ifndef HAVE_GMTIME_R
211 privoxy_mutex_t gmtime_mutex;
212 #endif /* ndef HAVE_GMTIME_R */
214 #ifndef HAVE_LOCALTIME_R
215 privoxy_mutex_t localtime_mutex;
216 #endif /* ndef HAVE_GMTIME_R */
218 #if !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM)
219 privoxy_mutex_t rand_mutex;
220 #endif /* !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM) */
222 #endif /* def MUTEX_LOCKS_AVAILABLE */
225 const char *basedir = NULL;
226 const char *pidfile = NULL;
227 static int received_hup_signal = 0;
228 #endif /* defined unix */
230 /* HTTP snipplets. */
231 static const char CSUCCEED[] =
232 "HTTP/1.1 200 Connection established\r\n\r\n";
234 static const char CHEADER[] =
235 "HTTP/1.1 400 Invalid header received from client\r\n"
236 "Content-Type: text/plain\r\n"
237 "Connection: close\r\n\r\n"
238 "Invalid header received from client.\n";
240 static const char FTP_RESPONSE[] =
241 "HTTP/1.1 400 Invalid request received from client\r\n"
242 "Content-Type: text/plain\r\n"
243 "Connection: close\r\n\r\n"
244 "Invalid request. Privoxy doesn't support FTP.\n";
246 static const char GOPHER_RESPONSE[] =
247 "HTTP/1.1 400 Invalid request received from client\r\n"
248 "Content-Type: text/plain\r\n"
249 "Connection: close\r\n\r\n"
250 "Invalid request. Privoxy doesn't support gopher.\n";
252 /* XXX: should be a template */
253 static const char MISSING_DESTINATION_RESPONSE[] =
254 "HTTP/1.1 400 Bad request received from client\r\n"
255 "Content-Type: text/plain\r\n"
256 "Connection: close\r\n\r\n"
257 "Bad request. Privoxy was unable to extract the destination.\n";
259 /* XXX: should be a template */
260 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
261 "HTTP/1.1 502 Server or forwarder response invalid\r\n"
262 "Content-Type: text/plain\r\n"
263 "Connection: close\r\n\r\n"
264 "Bad response. The server or forwarder response doesn't look like HTTP.\n";
266 /* XXX: should be a template */
267 static const char MESSED_UP_REQUEST_RESPONSE[] =
268 "HTTP/1.1 400 Malformed request after rewriting\r\n"
269 "Content-Type: text/plain\r\n"
270 "Connection: close\r\n\r\n"
271 "Bad request. Messed up with header filters.\n";
273 static const char TOO_MANY_CONNECTIONS_RESPONSE[] =
274 "HTTP/1.1 503 Too many open connections\r\n"
275 "Content-Type: text/plain\r\n"
276 "Connection: close\r\n\r\n"
277 "Maximum number of open connections reached.\n";
279 static const char CLIENT_CONNECTION_TIMEOUT_RESPONSE[] =
280 "HTTP/1.1 504 Connection timeout\r\n"
281 "Content-Type: text/plain\r\n"
282 "Connection: close\r\n\r\n"
283 "The connection timed out because the client request didn't arrive in time.\n";
285 static const char CLIENT_BODY_PARSE_ERROR_RESPONSE[] =
286 "HTTP/1.1 400 Failed reading client body\r\n"
287 "Content-Type: text/plain\r\n"
288 "Connection: close\r\n\r\n"
289 "Failed parsing or buffering the chunk-encoded client body.\n";
291 static const char UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE[] =
292 "HTTP/1.1 417 Expecting too much\r\n"
293 "Content-Type: text/plain\r\n"
294 "Connection: close\r\n\r\n"
295 "Privoxy detected an unsupported Expect header value.\n";
297 /* A function to crunch a response */
298 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
300 /* Crunch function flags */
301 #define CF_NO_FLAGS 0
302 /* Cruncher applies to forced requests as well */
303 #define CF_IGNORE_FORCE 1
304 /* Crunched requests are counted for the block statistics */
305 #define CF_COUNT_AS_REJECT 2
307 /* A crunch function and its flags */
310 const crunch_func_ptr cruncher;
314 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
316 /* Complete list of cruncher functions */
317 static const struct cruncher crunchers_all[] = {
318 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
319 { block_url, CF_COUNT_AS_REJECT },
321 { trust_url, CF_COUNT_AS_REJECT },
322 #endif /* def FEATURE_TRUST */
323 { redirect_url, CF_NO_FLAGS },
324 { dispatch_cgi, CF_IGNORE_FORCE},
328 /* Light version, used after tags are applied */
329 static const struct cruncher crunchers_light[] = {
330 { block_url, CF_COUNT_AS_REJECT },
331 { redirect_url, CF_NO_FLAGS },
337 * XXX: Don't we really mean
344 /*********************************************************************
346 * Function : sig_handler
348 * Description : Signal handler for different signals.
349 * Exit gracefully on TERM and INT
350 * or set a flag that will cause the errlog
351 * to be reopened by the main thread on HUP.
354 * 1 : the_signal = the signal cause this function to call
358 *********************************************************************/
359 static void sig_handler(int the_signal)
365 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
377 received_hup_signal = 1;
383 * We shouldn't be here, unless we catch signals
384 * in main() that we can't handle here!
386 log_error(LOG_LEVEL_FATAL,
387 "sig_handler: exiting on unexpected signal %d", the_signal);
395 /*********************************************************************
397 * Function : get_write_delay
399 * Description : Parse the delay-response parameter.
402 * 1 : csp = Current client state (buffers, headers, etc...)
404 * Returns : Number of milliseconds to delay writes.
406 *********************************************************************/
407 static unsigned int get_write_delay(const struct client_state *csp)
413 if ((csp->action->flags & ACTION_DELAY_RESPONSE) == 0)
417 newval = csp->action->string[ACTION_STRING_DELAY_RESPONSE];
419 delay = (unsigned)strtol(newval, &endptr, 0);
422 log_error(LOG_LEVEL_FATAL,
423 "Invalid delay-response{} parameter: '%s'", newval);
431 /*********************************************************************
433 * Function : client_protocol_is_unsupported
435 * Description : Checks if the client used a known unsupported
436 * protocol and deals with it by sending an error
440 * 1 : csp = Current client state (buffers, headers, etc...)
441 * 2 : req = the first request line send by the client
443 * Returns : TRUE if an error response has been generated, or
444 * FALSE if the request doesn't look invalid.
446 *********************************************************************/
447 static int client_protocol_is_unsupported(struct client_state *csp, char *req)
450 * If it's a FTP or gopher request, we don't support it.
452 * These checks are better than nothing, but they might
453 * not work in all configurations and some clients might
454 * have problems digesting the answer.
456 * They should, however, never cause more problems than
457 * Privoxy's old behaviour (returning the misleading HTML
460 * "Could not resolve http://(ftp|gopher)://example.org").
462 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
464 const char *response = NULL;
465 const char *protocol = NULL;
467 if (!strncmpic(req, "GET ftp://", 10))
469 response = FTP_RESPONSE;
474 response = GOPHER_RESPONSE;
477 log_error(LOG_LEVEL_ERROR,
478 "%s tried to use Privoxy as %s proxy: %s",
479 csp->ip_addr_str, protocol, req);
480 log_error(LOG_LEVEL_CLF,
481 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
484 #ifdef FEATURE_HTTPS_INSPECTION
485 if (client_use_ssl(csp))
487 ssl_send_data_delayed(&(csp->ssl_client_attr),
488 (const unsigned char *)response, strlen(response),
489 get_write_delay(csp));
494 write_socket_delayed(csp->cfd, response, strlen(response),
495 get_write_delay(csp));
505 /*********************************************************************
507 * Function : client_has_unsupported_expectations
509 * Description : Checks if the client used an unsupported expectation
510 * in which case an error message is delivered.
513 * 1 : csp = Current client state (buffers, headers, etc...)
515 * Returns : TRUE if an error response has been generated, or
516 * FALSE if the request doesn't look invalid.
518 *********************************************************************/
519 static int client_has_unsupported_expectations(const struct client_state *csp)
521 if ((csp->flags & CSP_FLAG_UNSUPPORTED_CLIENT_EXPECTATION))
523 log_error(LOG_LEVEL_ERROR,
524 "Rejecting request from client %s with unsupported Expect header value",
526 log_error(LOG_LEVEL_CLF,
527 "%s - - [%T] \"%s\" 417 0", csp->ip_addr_str, csp->http->cmd);
528 write_socket_delayed(csp->cfd,
529 UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE,
530 strlen(UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE),
531 get_write_delay(csp));
541 /*********************************************************************
543 * Function : get_request_destination_elsewhere
545 * Description : If the client's request was redirected into
546 * Privoxy without the client's knowledge,
547 * the request line lacks the destination host.
549 * This function tries to get it elsewhere,
550 * provided accept-intercepted-requests is enabled.
552 * "Elsewhere" currently only means "Host: header",
553 * but in the future we may ask the redirecting
554 * packet filter to look the destination up.
556 * If the destination stays unknown, an error
557 * response is send to the client and headers
558 * are freed so that chat() can return directly.
561 * 1 : csp = Current client state (buffers, headers, etc...)
562 * 2 : headers = a header list
564 * Returns : JB_ERR_OK if the destination is now known, or
565 * JB_ERR_PARSE if it isn't.
567 *********************************************************************/
568 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
570 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
572 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
573 " Privoxy isn't configured to accept intercepted requests.",
574 csp->ip_addr_str, csp->http->cmd);
575 /* XXX: Use correct size */
576 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
577 csp->ip_addr_str, csp->http->cmd);
579 write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER),
580 get_write_delay(csp));
581 destroy_list(headers);
585 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
587 /* Split the domain we just got for pattern matching */
588 init_domain_components(csp->http);
594 /* We can't work without destination. Go spread the news.*/
596 /* XXX: Use correct size */
597 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
598 csp->ip_addr_str, csp->http->cmd);
599 log_error(LOG_LEVEL_ERROR,
600 "Privoxy was unable to get the destination for %s's request: %s",
601 csp->ip_addr_str, csp->http->cmd);
603 write_socket_delayed(csp->cfd, MISSING_DESTINATION_RESPONSE,
604 strlen(MISSING_DESTINATION_RESPONSE), get_write_delay(csp));
605 destroy_list(headers);
610 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
611 * to get the destination IP address, use it as host directly
612 * or do a reverse DNS lookup first.
617 /*********************************************************************
619 * Function : get_server_headers
621 * Description : Parses server headers in iob and fills them
622 * into csp->headers so that they can later be
626 * 1 : csp = Current client state (buffers, headers, etc...)
628 * Returns : JB_ERR_OK if everything went fine, or
629 * JB_ERR_PARSE if the headers were incomplete.
631 *********************************************************************/
632 static jb_err get_server_headers(struct client_state *csp)
634 int continue_hack_in_da_house = 0;
637 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
642 * continue hack in da house. Ignore the ending of
643 * this head and continue enlisting header lines.
644 * The reason is described below.
646 enlist(csp->headers, "");
647 continue_hack_in_da_house = 0;
650 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
653 * It's a bodyless continue response, don't
654 * stop header parsing after reaching its end.
656 * As a result Privoxy will concatenate the
657 * next response's head and parse and deliver
658 * the headers as if they belonged to one request.
660 * The client will separate them because of the
661 * empty line between them.
663 * XXX: What we're doing here is clearly against
664 * the intended purpose of the continue header,
665 * and under some conditions (HTTP/1.0 client request)
666 * it's a standard violation.
668 * Anyway, "sort of against the spec" is preferable
669 * to "always getting confused by Continue responses"
670 * (Privoxy's behaviour before this hack was added)
672 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
673 continue_hack_in_da_house = 1;
675 else if (*header == '\0')
678 * If the header is empty, but the Continue hack
679 * isn't active, we can assume that we reached the
680 * end of the buffer before we hit the end of the
683 * Inform the caller an let it decide how to handle it.
688 if (JB_ERR_MEMORY == enlist(csp->headers, header))
691 * XXX: Should we quit the request and return a
692 * out of memory error page instead?
694 log_error(LOG_LEVEL_ERROR,
695 "Out of memory while enlisting server headers. %s lost.",
705 /*********************************************************************
707 * Function : crunch_reason
709 * Description : Translates the crunch reason code into a string.
712 * 1 : rsp = a http_response
714 * Returns : A string with the crunch reason or an error description.
716 *********************************************************************/
717 static const char *crunch_reason(const struct http_response *rsp)
719 char * reason = NULL;
724 return "Internal error while searching for crunch reason";
727 switch (rsp->crunch_reason)
730 reason = "Unsupported HTTP feature";
736 reason = "Untrusted";
739 reason = "Redirected";
745 reason = "DNS failure";
747 case FORWARDING_FAILED:
748 reason = "Forwarding failed";
751 reason = "Connection failure";
754 reason = "Out of memory (may mask other reasons)";
756 case CONNECTION_TIMEOUT:
757 reason = "Connection timeout";
760 reason = "No server data received";
763 reason = "No reason recorded";
771 /*********************************************************************
773 * Function : log_applied_actions
775 * Description : Logs the applied actions if LOG_LEVEL_ACTIONS is
779 * 1 : actions = Current action spec to log
783 *********************************************************************/
784 static void log_applied_actions(const struct current_action_spec *actions)
787 * The conversion to text requires lots of memory allocations so
788 * we only do the conversion if the user is actually interested.
790 if (debug_level_is_enabled(LOG_LEVEL_ACTIONS))
792 char *actions_as_text = actions_to_line_of_text(actions);
793 log_error(LOG_LEVEL_ACTIONS, "%s", actions_as_text);
794 freez(actions_as_text);
799 /*********************************************************************
801 * Function : send_crunch_response
803 * Description : Delivers already prepared response for
804 * intercepted requests, logs the interception
805 * and frees the response.
808 * 1 : csp = Current client state (buffers, headers, etc...)
809 * 2 : rsp = Fully prepared response. Will be freed on exit.
813 *********************************************************************/
814 static void send_crunch_response(struct client_state *csp, struct http_response *rsp)
816 const struct http_request *http = csp->http;
820 assert(rsp->head != NULL);
824 log_error(LOG_LEVEL_FATAL, "NULL response in send_crunch_response.");
828 * Extract the status code from the actual head
829 * that will be send to the client. It is the only
830 * way to get it right for all requests, including
831 * the fixed ones for out-of-memory problems.
833 * A head starts like this: 'HTTP/1.1 200...'
837 status_code[0] = rsp->head[9];
838 status_code[1] = rsp->head[10];
839 status_code[2] = rsp->head[11];
840 status_code[3] = '\0';
842 /* Log that the request was crunched and why. */
843 log_applied_actions(csp->action);
844 #ifdef FEATURE_HTTPS_INSPECTION
845 if (client_use_ssl(csp))
847 log_error(LOG_LEVEL_CRUNCH, "%s: https://%s%s", crunch_reason(rsp),
848 http->hostport, http->path);
849 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s https://%s%s %s\" %s %lu",
850 csp->ip_addr_str, http->gpc, http->hostport, http->path,
851 http->version, status_code, rsp->content_length);
856 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
857 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %lu",
858 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
860 /* Write the answer to the client */
861 #ifdef FEATURE_HTTPS_INSPECTION
862 if (client_use_ssl(csp))
864 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
865 (const unsigned char *)rsp->head, rsp->head_length,
866 get_write_delay(csp)) < 0)
867 || (ssl_send_data_delayed(&(csp->ssl_client_attr),
868 (const unsigned char *)rsp->body, rsp->content_length,
869 get_write_delay(csp)) < 0))
871 /* There is nothing we can do about it. */
872 log_error(LOG_LEVEL_CONNECT, "Couldn't deliver the error message "
873 "for https://%s%s through client socket %d using TLS/SSL",
874 http->hostport, http->url, csp->cfd);
880 if (write_socket_delayed(csp->cfd, rsp->head, rsp->head_length,
881 get_write_delay(csp))
882 || write_socket_delayed(csp->cfd, rsp->body, rsp->content_length,
883 get_write_delay(csp)))
885 /* There is nothing we can do about it. */
886 log_error(LOG_LEVEL_CONNECT,
887 "Couldn't deliver the error message for %s through client socket %d: %E",
888 http->url, csp->cfd);
892 /* Clean up and return */
893 if (cgi_error_memory() != rsp)
895 free_http_response(rsp);
901 /*********************************************************************
903 * Function : crunch_response_triggered
905 * Description : Checks if the request has to be crunched,
906 * and delivers the crunch response if necessary.
909 * 1 : csp = Current client state (buffers, headers, etc...)
910 * 2 : crunchers = list of cruncher functions to run
912 * Returns : TRUE if the request was answered with a crunch response
915 *********************************************************************/
916 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
918 struct http_response *rsp = NULL;
919 const struct cruncher *c;
922 * If CGI request crunching is disabled,
923 * check the CGI dispatcher out of order to
924 * prevent unintentional blocks or redirects.
926 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
927 && (NULL != (rsp = dispatch_cgi(csp))))
929 /* Deliver, log and free the interception response. */
930 send_crunch_response(csp, rsp);
931 csp->flags |= CSP_FLAG_CRUNCHED;
935 for (c = crunchers; c->cruncher != NULL; c++)
938 * Check the cruncher if either Privoxy is toggled
939 * on and the request isn't forced, or if the cruncher
940 * applies to forced requests as well.
942 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
943 !(csp->flags & CSP_FLAG_FORCED)) ||
944 (c->flags & CF_IGNORE_FORCE))
946 rsp = c->cruncher(csp);
949 /* Deliver, log and free the interception response. */
950 send_crunch_response(csp, rsp);
951 csp->flags |= CSP_FLAG_CRUNCHED;
952 #ifdef FEATURE_STATISTICS
953 if (c->flags & CF_COUNT_AS_REJECT)
955 #ifdef MUTEX_LOCKS_AVAILABLE
956 privoxy_mutex_lock(&block_statistics_mutex);
957 number_of_requests_blocked++;
958 privoxy_mutex_unlock(&block_statistics_mutex);
960 csp->flags |= CSP_FLAG_REJECTED;
962 #endif /* def FEATURE_STATISTICS */
973 /*********************************************************************
975 * Function : build_request_line
977 * Description : Builds the HTTP request line.
979 * If a HTTP forwarder is used it expects the whole URL,
980 * web servers only get the path.
983 * 1 : csp = Current client state (buffers, headers, etc...)
984 * 2 : fwd = The forwarding spec used for the request.
986 * 3 : request_line = The old request line which will be replaced.
988 * Returns : Nothing. Terminates in case of memory problems.
990 *********************************************************************/
991 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
993 struct http_request *http = csp->http;
996 * Downgrade http version from 1.1 to 1.0
997 * if +downgrade action applies.
999 if ((csp->action->flags & ACTION_DOWNGRADE)
1000 && (!strcmpic(http->version, "HTTP/1.1")))
1002 freez(http->version);
1003 http->version = strdup_or_die("HTTP/1.0");
1007 * Rebuild the request line.
1009 freez(*request_line);
1010 #ifdef FEATURE_HTTPS_INSPECTION
1011 if (fwd != NULL && fwd->forward_host &&
1012 fwd->type != FORWARD_WEBSERVER && client_use_ssl(csp))
1014 *request_line = strdup("CONNECT ");
1019 *request_line = strdup(http->gpc);
1020 string_append(request_line, " ");
1023 if (fwd != NULL && fwd->forward_host && fwd->type != FORWARD_WEBSERVER)
1025 #ifdef FEATURE_HTTPS_INSPECTION
1026 if (client_use_ssl(csp))
1028 char port_string[10];
1030 string_append(request_line, http->host);
1031 snprintf(port_string, sizeof(port_string), ":%d", http->port);
1032 string_append(request_line, port_string);
1037 string_append(request_line, http->url);
1042 string_append(request_line, http->path);
1044 string_append(request_line, " ");
1045 string_append(request_line, http->version);
1047 if (*request_line == NULL)
1049 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1051 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
1055 /*********************************************************************
1057 * Function : change_request_destination
1059 * Description : Parse a (rewritten) request line and regenerate
1060 * the http request data.
1063 * 1 : csp = Current client state (buffers, headers, etc...)
1065 * Returns : Forwards the parse_http_request() return code.
1066 * Terminates in case of memory problems.
1068 *********************************************************************/
1069 static jb_err change_request_destination(struct client_state *csp)
1071 struct http_request *http = csp->http;
1074 log_error(LOG_LEVEL_REDIRECTS, "Rewrite detected: %s",
1075 csp->headers->first->str);
1076 free_http_request(http);
1077 err = parse_http_request(csp->headers->first->str, http);
1078 if (JB_ERR_OK != err)
1080 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
1081 jb_err_to_string(err));
1083 if (http->ssl && strcmpic(csp->http->gpc, "CONNECT"))
1086 * A client header filter changed the request URL from
1087 * http:// to https:// which we currently don't support.
1089 log_error(LOG_LEVEL_ERROR, "Changing the request destination from http "
1090 "to https behind the client's back currently isn't supported.");
1091 return JB_ERR_PARSE;
1098 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1099 /*********************************************************************
1101 * Function : server_response_is_complete
1103 * Description : Determines whether we should stop reading
1104 * from the server socket.
1107 * 1 : csp = Current client state (buffers, headers, etc...)
1108 * 2 : content_length = Length of content received so far.
1110 * Returns : TRUE if the response is complete,
1113 *********************************************************************/
1114 static int server_response_is_complete(struct client_state *csp,
1115 unsigned long long content_length)
1117 int content_length_known = !!(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
1119 if (!strcmpic(csp->http->gpc, "HEAD"))
1122 * "HEAD" implies no body, we are thus expecting
1123 * no content. XXX: incomplete "list" of methods?
1125 csp->expected_content_length = 0;
1126 content_length_known = TRUE;
1127 csp->flags |= CSP_FLAG_SERVER_CONTENT_LENGTH_SET;
1130 if (csp->http->status == 204 || csp->http->status == 304)
1133 * Expect no body. XXX: incomplete "list" of status codes?
1135 csp->expected_content_length = 0;
1136 content_length_known = TRUE;
1137 csp->flags |= CSP_FLAG_SERVER_CONTENT_LENGTH_SET;
1140 return (content_length_known && ((0 == csp->expected_content_length)
1141 || (csp->expected_content_length <= content_length)));
1145 #ifdef FEATURE_CONNECTION_SHARING
1146 /*********************************************************************
1148 * Function : wait_for_alive_connections
1150 * Description : Waits for alive connections to timeout.
1156 *********************************************************************/
1157 static void wait_for_alive_connections(void)
1159 int connections_alive = close_unusable_connections();
1161 while (0 < connections_alive)
1163 log_error(LOG_LEVEL_CONNECT,
1164 "Waiting for %d connections to timeout.",
1167 connections_alive = close_unusable_connections();
1170 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
1173 #endif /* def FEATURE_CONNECTION_SHARING */
1176 /*********************************************************************
1178 * Function : save_connection_destination
1180 * Description : Remembers a connection for reuse later on.
1183 * 1 : sfd = Open socket to remember.
1184 * 2 : http = The destination for the connection.
1185 * 3 : fwd = The forwarder settings used.
1186 * 4 : server_connection = storage.
1190 *********************************************************************/
1191 static void save_connection_destination(jb_socket sfd,
1192 const struct http_request *http,
1193 const struct forward_spec *fwd,
1194 struct reusable_connection *server_connection)
1196 assert(sfd != JB_INVALID_SOCKET);
1197 assert(NULL != http->host);
1199 server_connection->sfd = sfd;
1200 server_connection->host = strdup_or_die(http->host);
1201 server_connection->port = http->port;
1203 assert(NULL != fwd);
1204 assert(server_connection->gateway_host == NULL);
1205 assert(server_connection->gateway_port == 0);
1206 assert(server_connection->forwarder_type == 0);
1207 assert(server_connection->forward_host == NULL);
1208 assert(server_connection->forward_port == 0);
1210 server_connection->forwarder_type = fwd->type;
1211 if (NULL != fwd->gateway_host)
1213 server_connection->gateway_host = strdup_or_die(fwd->gateway_host);
1217 server_connection->gateway_host = NULL;
1219 server_connection->gateway_port = fwd->gateway_port;
1220 if (NULL != fwd->auth_username)
1222 server_connection->auth_username = strdup_or_die(fwd->auth_username);
1226 server_connection->auth_username = NULL;
1228 if (NULL != fwd->auth_password)
1230 server_connection->auth_password = strdup_or_die(fwd->auth_password);
1234 server_connection->auth_password = NULL;
1237 if (NULL != fwd->forward_host)
1239 server_connection->forward_host = strdup_or_die(fwd->forward_host);
1243 server_connection->forward_host = NULL;
1245 server_connection->forward_port = fwd->forward_port;
1247 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1250 /*********************************************************************
1252 * Function : verify_request_length
1254 * Description : Checks if we already got the whole client requests
1255 * and sets CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ if
1258 * Data that doesn't belong to the current request is
1259 * either thrown away to let the client retry on a clean
1260 * socket, or stashed to be dealt with after the current
1261 * request is served.
1264 * 1 : csp = Current client state (buffers, headers, etc...)
1268 *********************************************************************/
1269 static void verify_request_length(struct client_state *csp)
1271 unsigned long long buffered_request_bytes =
1272 (unsigned long long)(csp->client_iob->eod - csp->client_iob->cur);
1274 if ((csp->expected_client_content_length != 0)
1275 && (buffered_request_bytes != 0))
1277 if (csp->expected_client_content_length >= buffered_request_bytes)
1279 csp->expected_client_content_length -= buffered_request_bytes;
1280 log_error(LOG_LEVEL_CONNECT, "Reduced expected bytes to %llu "
1281 "to account for the %llu ones we already got.",
1282 csp->expected_client_content_length, buffered_request_bytes);
1286 assert(csp->client_iob->eod > csp->client_iob->cur + csp->expected_client_content_length);
1287 csp->client_iob->eod = csp->client_iob->cur + csp->expected_client_content_length;
1288 log_error(LOG_LEVEL_CONNECT, "Reducing expected bytes to 0. "
1289 "Marking the server socket tainted after throwing %llu bytes away.",
1290 buffered_request_bytes - csp->expected_client_content_length);
1291 csp->expected_client_content_length = 0;
1292 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1295 if (csp->expected_client_content_length == 0)
1297 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1301 if (!(csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ)
1302 && ((csp->client_iob->cur < csp->client_iob->eod)
1303 || (csp->expected_client_content_length != 0)))
1305 if (strcmpic(csp->http->gpc, "GET")
1306 && strcmpic(csp->http->gpc, "HEAD")
1307 && strcmpic(csp->http->gpc, "TRACE")
1308 && strcmpic(csp->http->gpc, "OPTIONS")
1309 && strcmpic(csp->http->gpc, "DELETE"))
1311 /* XXX: this is an incomplete hack */
1312 csp->flags &= ~CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1313 log_error(LOG_LEVEL_CONNECT, "There better be a request body.");
1317 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1319 if ((csp->config->feature_flags & RUNTIME_FEATURE_TOLERATE_PIPELINING) == 0)
1321 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1322 log_error(LOG_LEVEL_CONNECT,
1323 "Possible pipeline attempt detected. The connection will not "
1324 "be kept alive and we will only serve the first request.");
1325 /* Nuke the pipelined requests from orbit, just to be sure. */
1326 clear_iob(csp->client_iob);
1331 * Keep the pipelined data around for now, we'll deal with
1332 * it once we're done serving the current request.
1334 csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
1335 assert(csp->client_iob->eod >= csp->client_iob->cur);
1336 log_error(LOG_LEVEL_CONNECT, "Complete client request followed by "
1337 "%d bytes of pipelined data received.",
1338 (int)(csp->client_iob->eod - csp->client_iob->cur));
1344 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1345 log_error(LOG_LEVEL_CONNECT, "Complete client request received.");
1350 /*********************************************************************
1352 * Function : mark_server_socket_tainted
1354 * Description : Makes sure we don't reuse a server socket
1355 * (if we didn't read everything the server sent
1356 * us reusing the socket would lead to garbage).
1359 * 1 : csp = Current client state (buffers, headers, etc...)
1363 *********************************************************************/
1364 static void mark_server_socket_tainted(struct client_state *csp)
1367 * For consistency we always mark the server socket
1368 * tainted, however, to reduce the log noise we only
1369 * emit a log message if the server socket could have
1370 * actually been reused.
1372 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
1373 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED))
1375 log_error(LOG_LEVEL_CONNECT,
1376 "Marking the server socket %d tainted.",
1377 csp->server_connection.sfd);
1379 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1382 /*********************************************************************
1384 * Function : get_request_line
1386 * Description : Read the client request line.
1389 * 1 : csp = Current client state (buffers, headers, etc...)
1391 * Returns : Pointer to request line or NULL in case of errors.
1393 *********************************************************************/
1394 static char *get_request_line(struct client_state *csp)
1396 char buf[BUFFER_SIZE];
1397 char *request_line = NULL;
1400 memset(buf, 0, sizeof(buf));
1402 if ((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) != 0)
1405 * If there are multiple pipelined requests waiting,
1406 * the flag will be set again once the next request
1409 csp->flags &= ~CSP_FLAG_PIPELINED_REQUEST_WAITING;
1411 request_line = get_header(csp->client_iob);
1412 if ((NULL != request_line) && ('\0' != *request_line))
1414 return request_line;
1418 log_error(LOG_LEVEL_CONNECT, "No complete request line "
1419 "received yet. Continuing reading from %d.", csp->cfd);
1427 0 == (csp->flags & CSP_FLAG_FUZZED_INPUT) &&
1429 !data_is_available(csp->cfd, csp->config->socket_timeout)
1432 if (socket_is_still_alive(csp->cfd))
1434 log_error(LOG_LEVEL_CONNECT,
1435 "No request line on socket %d received in time. Timeout: %d.",
1436 csp->cfd, csp->config->socket_timeout);
1437 write_socket_delayed(csp->cfd, CLIENT_CONNECTION_TIMEOUT_RESPONSE,
1438 strlen(CLIENT_CONNECTION_TIMEOUT_RESPONSE),
1439 get_write_delay(csp));
1443 log_error(LOG_LEVEL_CONNECT,
1444 "The client side of the connection on socket %d got "
1445 "closed without sending a complete request line.", csp->cfd);
1450 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1452 if (len <= 0) return NULL;
1455 * If there is no memory left for buffering the
1456 * request, there is nothing we can do but hang up
1458 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
1463 request_line = get_header(csp->client_iob);
1465 } while ((NULL != request_line) && ('\0' == *request_line));
1467 return request_line;
1473 CHUNK_STATUS_MISSING_DATA,
1474 CHUNK_STATUS_BODY_COMPLETE,
1475 CHUNK_STATUS_PARSE_ERROR
1479 /*********************************************************************
1481 * Function : chunked_body_is_complete
1483 * Description : Figures out whether or not a chunked body is complete.
1485 * Currently it always starts at the beginning of the
1486 * buffer which is somewhat wasteful and prevents Privoxy
1487 * from starting to forward the correctly parsed chunks
1488 * as soon as theoretically possible.
1490 * Should be modified to work with a common buffer,
1491 * and allow the caller to skip already parsed chunks.
1493 * This would allow the function to be used for unbuffered
1494 * response bodies as well.
1497 * 1 : iob = Buffer with the body to check.
1498 * 2 : length = Length of complete body
1500 * Returns : Enum with the result of the check.
1502 *********************************************************************/
1503 static enum chunk_status chunked_body_is_complete(struct iob *iob, size_t *length)
1505 unsigned int chunksize;
1511 * We need at least a single digit, followed by "\r\n",
1512 * followed by an unknown amount of data, followed by "\r\n".
1514 if (p + 5 > iob->eod)
1516 return CHUNK_STATUS_MISSING_DATA;
1518 if (sscanf(p, "%x", &chunksize) != 1)
1520 return CHUNK_STATUS_PARSE_ERROR;
1524 * We want at least a single digit, followed by "\r\n",
1525 * followed by the specified amount of data, followed by "\r\n".
1527 if (p + chunksize + 5 > iob->eod)
1529 return CHUNK_STATUS_MISSING_DATA;
1532 /* Skip chunk-size. */
1533 p = strstr(p, "\r\n");
1536 return CHUNK_STATUS_PARSE_ERROR;
1538 /* Move beyond the chunkdata. */
1541 /* Make sure we're still within the buffer and have two bytes left */
1542 if (p + 2 > iob->eod)
1544 return CHUNK_STATUS_MISSING_DATA;
1547 /* There should be another "\r\n" to skip */
1548 if (memcmp(p, "\r\n", 2))
1550 return CHUNK_STATUS_PARSE_ERROR;
1553 } while (chunksize > 0U);
1555 *length = (size_t)(p - iob->cur);
1556 assert(*length <= (size_t)(iob->eod - iob->cur));
1557 assert(p <= iob->eod);
1559 return CHUNK_STATUS_BODY_COMPLETE;
1564 /*********************************************************************
1566 * Function : receive_chunked_client_request_body
1568 * Description : Read the chunk-encoded client request body.
1569 * Failures are dealt with.
1572 * 1 : csp = Current client state (buffers, headers, etc...)
1574 * Returns : JB_ERR_OK or JB_ERR_PARSE
1576 *********************************************************************/
1577 static jb_err receive_chunked_client_request_body(struct client_state *csp)
1580 enum chunk_status status;
1582 while (CHUNK_STATUS_MISSING_DATA ==
1583 (status = chunked_body_is_complete(csp->client_iob, &body_length)))
1585 char buf[BUFFER_SIZE];
1588 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1590 log_error(LOG_LEVEL_ERROR,
1591 "Timeout while waiting for the client body.");
1594 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1597 log_error(LOG_LEVEL_ERROR,
1598 "Reading the client body failed: %E");
1601 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
1606 if (status != CHUNK_STATUS_BODY_COMPLETE)
1608 write_socket_delayed(csp->cfd, CLIENT_BODY_PARSE_ERROR_RESPONSE,
1609 strlen(CLIENT_BODY_PARSE_ERROR_RESPONSE), get_write_delay(csp));
1610 log_error(LOG_LEVEL_CLF,
1611 "%s - - [%T] \"Failed reading chunked client body\" 400 0", csp->ip_addr_str);
1612 return JB_ERR_PARSE;
1614 log_error(LOG_LEVEL_CONNECT,
1615 "Chunked client body completely read. Length: %lu", body_length);
1616 csp->expected_client_content_length = body_length;
1624 /*********************************************************************
1626 * Function : fuzz_chunked_transfer_encoding
1628 * Description : Treat the fuzzed input as chunked transfer encoding
1629 * to check and dechunk.
1632 * 1 : csp = Used to store the data.
1633 * 2 : fuzz_input_file = File to read the input from.
1635 * Returns : Result of dechunking
1637 *********************************************************************/
1638 extern int fuzz_chunked_transfer_encoding(struct client_state *csp, char *fuzz_input_file)
1641 size_t size = (size_t)(csp->iob->eod - csp->iob->cur);
1642 enum chunk_status status;
1644 status = chunked_body_is_complete(csp->iob, &length);
1645 if (CHUNK_STATUS_BODY_COMPLETE != status)
1647 log_error(LOG_LEVEL_INFO, "Chunked body is incomplete or invalid");
1650 return (JB_ERR_OK == remove_chunked_transfer_coding(csp->iob->cur, &size));
1655 /*********************************************************************
1657 * Function : fuzz_client_request
1659 * Description : Try to get a client request from the fuzzed input.
1662 * 1 : csp = Current client state (buffers, headers, etc...)
1663 * 2 : fuzz_input_file = File to read the input from.
1665 * Returns : Result of fuzzing.
1667 *********************************************************************/
1668 extern int fuzz_client_request(struct client_state *csp, char *fuzz_input_file)
1673 csp->ip_addr_str = "fuzzer";
1675 if (strcmp(fuzz_input_file, "-") != 0)
1677 log_error(LOG_LEVEL_FATAL,
1678 "Fuzzed client requests can currently only be read from stdin (-).");
1680 err = receive_client_request(csp);
1681 if (err != JB_ERR_OK)
1685 err = parse_client_request(csp);
1686 if (err != JB_ERR_OK)
1694 #endif /* def FUZZ */
1697 #ifdef FEATURE_FORCE_LOAD
1698 /*********************************************************************
1700 * Function : force_required
1702 * Description : Checks a request line to see if it contains
1703 * the FORCE_PREFIX. If it does, it is removed
1704 * unless enforcing requests has beend disabled.
1707 * 1 : request_line = HTTP request line
1709 * Returns : TRUE if force is required, FALSE otherwise.
1711 *********************************************************************/
1712 static int force_required(const struct client_state *csp, char *request_line)
1716 p = strstr(request_line, "http://");
1720 p += strlen("http://");
1724 /* Intercepted request usually don't specify the protocol. */
1728 /* Go to the beginning of the path */
1733 * If the path is missing the request line is invalid and we
1734 * are done here. The client-visible rejection happens later on.
1739 if (0 == strncmpic(p, FORCE_PREFIX, strlen(FORCE_PREFIX) - 1))
1741 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS))
1743 /* XXX: Should clean more carefully */
1744 strclean(request_line, FORCE_PREFIX);
1745 log_error(LOG_LEVEL_FORCE,
1746 "Enforcing request: \"%s\".", request_line);
1750 log_error(LOG_LEVEL_FORCE,
1751 "Ignored force prefix in request: \"%s\".", request_line);
1757 #endif /* def FEATURE_FORCE_LOAD */
1760 /*********************************************************************
1762 * Function : receive_client_request
1764 * Description : Read the client's request (more precisely the
1765 * client headers) and answer it if necessary.
1768 * 1 : csp = Current client state (buffers, headers, etc...)
1770 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
1772 *********************************************************************/
1773 static jb_err receive_client_request(struct client_state *csp)
1775 char buf[BUFFER_SIZE];
1778 struct http_request *http;
1782 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1783 struct list header_list;
1784 struct list *headers = &header_list;
1786 /* We don't care if the arriving data is a valid HTTP request or not. */
1787 csp->requests_received_total++;
1791 memset(buf, 0, sizeof(buf));
1793 req = get_request_line(csp);
1796 mark_server_socket_tainted(csp);
1797 return JB_ERR_PARSE;
1799 assert(*req != '\0');
1801 if (client_protocol_is_unsupported(csp, req))
1803 return JB_ERR_PARSE;
1806 #ifdef FEATURE_FORCE_LOAD
1807 if (force_required(csp, req))
1809 csp->flags |= CSP_FLAG_FORCED;
1811 #endif /* def FEATURE_FORCE_LOAD */
1813 err = parse_http_request(req, http);
1815 if (JB_ERR_OK != err)
1817 write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER),
1818 get_write_delay(csp));
1819 /* XXX: Use correct size */
1820 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1821 log_error(LOG_LEVEL_ERROR,
1822 "Couldn't parse request line received from %s: %s",
1823 csp->ip_addr_str, jb_err_to_string(err));
1825 free_http_request(http);
1826 return JB_ERR_PARSE;
1828 if (http->ssl && strcmpic(http->gpc, "CONNECT"))
1830 write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER),
1831 get_write_delay(csp));
1832 /* XXX: Use correct size */
1833 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0",
1835 log_error(LOG_LEVEL_ERROR, "Client %s tried to send a https "
1836 "URL without sending a CONNECT request first",
1838 free_http_request(http);
1839 return JB_ERR_PARSE;
1842 /* grab the rest of the client's headers */
1846 p = get_header(csp->client_iob);
1850 /* There are no additional headers to read. */
1857 * We didn't receive a complete header
1858 * line yet, get the rest of it.
1860 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1862 log_error(LOG_LEVEL_ERROR,
1863 "Client headers did not arrive in time. Timeout: %d",
1864 csp->config->socket_timeout);
1865 destroy_list(headers);
1866 return JB_ERR_PARSE;
1869 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1872 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1873 destroy_list(headers);
1874 return JB_ERR_PARSE;
1877 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
1880 * If there is no memory left for buffering the
1881 * request, there is nothing we can do but hang up
1883 destroy_list(headers);
1884 return JB_ERR_MEMORY;
1889 if (!strncmpic(p, "Transfer-Encoding:", 18))
1892 * XXX: should be called through sed()
1893 * but currently can't.
1895 client_transfer_encoding(csp, &p);
1898 * We were able to read a complete
1899 * header and can finally enlist it.
1906 if (http->host == NULL)
1909 * If we still don't know the request destination,
1910 * the request is invalid or the client uses
1911 * Privoxy without its knowledge.
1913 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1916 * Our attempts to get the request destination
1917 * elsewhere failed or Privoxy is configured
1918 * to only accept proxy requests.
1920 * An error response has already been sent
1921 * and we're done here.
1923 return JB_ERR_PARSE;
1927 #ifdef FEATURE_CLIENT_TAGS
1928 /* XXX: If the headers were enlisted sooner, passing csp would do. */
1929 set_client_address(csp, headers);
1930 get_tag_list_for_client(csp->client_tags, csp->client_address);
1934 * Determine the actions for this URL
1936 #ifdef FEATURE_TOGGLE
1937 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1939 /* Most compatible set of actions (i.e. none) */
1940 init_current_action(csp->action);
1943 #endif /* ndef FEATURE_TOGGLE */
1945 get_url_actions(csp, http);
1948 enlist(csp->headers, http->cmd);
1950 /* Append the previously read headers */
1951 err = list_append_list_unique(csp->headers, headers);
1952 destroy_list(headers);
1959 /*********************************************************************
1961 * Function : parse_client_request
1963 * Description : Parses the client's request and decides what to do
1966 * Note that since we're not using select() we could get
1967 * blocked here if a client connected, then didn't say
1971 * 1 : csp = Current client state (buffers, headers, etc...)
1973 * Returns : JB_ERR_OK or JB_ERR_PARSE
1975 *********************************************************************/
1976 static jb_err parse_client_request(struct client_state *csp)
1978 struct http_request *http = csp->http;
1981 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1982 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
1983 && (!strcmpic(csp->http->version, "HTTP/1.1"))
1984 && (csp->http->ssl == 0))
1986 /* Assume persistence until further notice */
1987 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
1989 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1991 if (csp->http->ssl == 0)
1994 * This whole block belongs to chat() but currently
1995 * has to be executed before sed().
1997 if (csp->flags & CSP_FLAG_CHUNKED_CLIENT_BODY)
1999 if (receive_chunked_client_request_body(csp) != JB_ERR_OK)
2001 return JB_ERR_PARSE;
2006 csp->expected_client_content_length = get_expected_content_length(csp->headers);
2008 verify_request_length(csp);
2010 #ifndef FEATURE_HTTPS_INSPECTION
2013 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
2017 err = sed(csp, FILTER_CLIENT_HEADERS);
2018 if (JB_ERR_OK != err)
2020 log_error(LOG_LEVEL_ERROR, "Failed to parse client request from %s.",
2022 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
2023 csp->ip_addr_str, csp->http->cmd);
2024 write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER), get_write_delay(csp));
2025 return JB_ERR_PARSE;
2027 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2029 /* Check request line for rewrites. */
2030 if ((NULL == csp->headers->first->str)
2031 || (strcmp(http->cmd, csp->headers->first->str) &&
2032 (JB_ERR_OK != change_request_destination(csp))))
2035 * A header filter broke the request line - bail out.
2037 write_socket_delayed(csp->cfd, MESSED_UP_REQUEST_RESPONSE,
2038 strlen(MESSED_UP_REQUEST_RESPONSE), get_write_delay(csp));
2039 /* XXX: Use correct size */
2040 log_error(LOG_LEVEL_CLF,
2041 "%s - - [%T] \"Invalid request generated\" 400 0", csp->ip_addr_str);
2042 log_error(LOG_LEVEL_ERROR,
2043 "Invalid request line after applying header filters.");
2044 free_http_request(http);
2046 return JB_ERR_PARSE;
2049 if (client_has_unsupported_expectations(csp))
2051 return JB_ERR_PARSE;
2059 /*********************************************************************
2061 * Function : read_http_request_body
2063 * Description : Reads remaining request body from the client.
2066 * 1 : csp = Current client state (buffers, headers, etc...)
2068 * Returns : 0 on success, anything else is an error.
2070 *********************************************************************/
2071 static int read_http_request_body(struct client_state *csp)
2073 size_t to_read = csp->expected_client_content_length;
2076 assert(to_read != 0);
2078 /* check if all data has been already read */
2079 if (to_read <= (csp->client_iob->eod - csp->client_iob->cur))
2084 for (to_read -= (size_t)(csp->client_iob->eod - csp->client_iob->cur);
2085 to_read > 0 && data_is_available(csp->cfd, csp->config->socket_timeout);
2086 to_read -= (unsigned)len)
2088 char buf[BUFFER_SIZE];
2089 size_t max_bytes_to_read = to_read < sizeof(buf) ? to_read : sizeof(buf);
2091 log_error(LOG_LEVEL_CONNECT,
2092 "Waiting for up to %lu bytes of request body from the client.",
2094 len = read_socket(csp->cfd, buf, (int)max_bytes_to_read);
2097 log_error(LOG_LEVEL_CONNECT, "Failed receiving request body from %s: %E", csp->ip_addr_str);
2100 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, (char *)buf, len))
2104 assert(to_read >= len);
2109 log_error(LOG_LEVEL_CONNECT,
2110 "Not enough request body has been read: expected %lu more bytes",
2114 log_error(LOG_LEVEL_CONNECT,
2115 "The last %d bytes of the request body have been read", len);
2120 /*********************************************************************
2122 * Function : update_client_headers
2124 * Description : Updates the HTTP headers from the client request.
2127 * 1 : csp = Current client state (buffers, headers, etc...)
2128 * 2 : new_content_length = new content length value to set
2130 * Returns : 0 on success, anything else is an error.
2132 *********************************************************************/
2133 static int update_client_headers(struct client_state *csp, size_t new_content_length)
2135 static const char content_length[] = "Content-Length:";
2137 struct list_entry *p;
2139 #ifndef FEATURE_HTTPS_INSPECTION
2140 for (p = csp->headers->first;
2142 for (p = csp->http->client_ssl ? csp->https_headers->first : csp->headers->first;
2144 !updated && (p != NULL); p = p->next)
2146 /* Header crunch()ed in previous run? -> ignore */
2152 /* Does the current parser handle this header? */
2153 if (0 == strncmpic(p->str, content_length, sizeof(content_length) - 1))
2155 updated = (JB_ERR_OK == header_adjust_content_length((char **)&(p->str), new_content_length));
2167 /*********************************************************************
2169 * Function : can_filter_request_body
2171 * Description : Checks if the current request body can be stored in
2172 * the client_iob without hitting buffer limit.
2175 * 1 : csp = Current client state (buffers, headers, etc...)
2177 * Returns : TRUE if the current request size do not exceed buffer limit
2180 *********************************************************************/
2181 static int can_filter_request_body(const struct client_state *csp)
2183 if (!can_add_to_iob(csp->client_iob, csp->config->buffer_limit,
2184 csp->expected_client_content_length))
2186 log_error(LOG_LEVEL_INFO,
2187 "Not filtering request body from %s: buffer limit %lu will be exceeded "
2188 "(content length %llu)", csp->ip_addr_str, csp->config->buffer_limit,
2189 csp->expected_client_content_length);
2196 /*********************************************************************
2198 * Function : send_http_request
2200 * Description : Sends the HTTP headers from the client request
2201 * and all the body data that has already been received.
2204 * 1 : csp = Current client state (buffers, headers, etc...)
2206 * Returns : 0 on success, anything else is an error.
2208 *********************************************************************/
2209 static int send_http_request(struct client_state *csp)
2213 const char *to_send;
2215 int filter_client_body = csp->expected_client_content_length != 0 &&
2216 client_body_filters_enabled(csp->action) && can_filter_request_body(csp);
2218 if (filter_client_body)
2220 if (read_http_request_body(csp))
2224 to_send_len = csp->expected_client_content_length;
2225 to_send = execute_client_body_filters(csp, &to_send_len);
2226 if (to_send == NULL)
2228 /* just flush client_iob */
2229 filter_client_body = FALSE;
2231 else if (to_send_len != csp->expected_client_content_length &&
2232 update_client_headers(csp, to_send_len))
2234 log_error(LOG_LEVEL_HEADER, "Error updating client headers");
2238 csp->expected_client_content_length = 0;
2241 hdr = list_to_text(csp->headers);
2244 /* FIXME Should handle error properly */
2245 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2247 list_remove_all(csp->headers);
2250 * Write the client's (modified) header to the server
2251 * (along with anything else that may be in the buffer)
2253 write_failure = 0 != write_socket(csp->server_connection.sfd, hdr, strlen(hdr));
2258 log_error(LOG_LEVEL_CONNECT, "Failed sending request headers to: %s: %E",
2259 csp->http->hostport);
2260 if (filter_client_body)
2267 if (filter_client_body)
2269 write_failure = 0 != write_socket(csp->server_connection.sfd, to_send, to_send_len);
2273 log_error(LOG_LEVEL_CONNECT, "Failed sending filtered request body to: %s: %E",
2274 csp->http->hostport);
2279 if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) == 0)
2280 && (flush_iob(csp->server_connection.sfd, csp->client_iob, 0) < 0))
2282 log_error(LOG_LEVEL_CONNECT, "Failed sending request body to: %s: %E",
2283 csp->http->hostport);
2290 #ifdef FEATURE_HTTPS_INSPECTION
2291 /*********************************************************************
2293 * Function : read_https_request_body
2295 * Description : Reads remaining request body from the client.
2298 * 1 : csp = Current client state (buffers, headers, etc...)
2300 * Returns : 0 on success, anything else is an error.
2302 *********************************************************************/
2303 static int read_https_request_body(struct client_state *csp)
2305 size_t to_read = csp->expected_client_content_length;
2308 assert(to_read != 0);
2310 /* check if all data has been already read */
2311 if (to_read <= (csp->client_iob->eod - csp->client_iob->cur))
2316 for (to_read -= (size_t)(csp->client_iob->eod - csp->client_iob->cur);
2317 to_read > 0 && (is_ssl_pending(&(csp->ssl_client_attr)) ||
2318 data_is_available(csp->cfd, csp->config->socket_timeout));
2319 to_read -= (unsigned)len)
2321 unsigned char buf[BUFFER_SIZE];
2322 size_t max_bytes_to_read = to_read < sizeof(buf) ? to_read : sizeof(buf);
2324 log_error(LOG_LEVEL_CONNECT,
2325 "Buffering encrypted client body. Prepared to read up to %lu bytes.",
2327 len = ssl_recv_data(&(csp->ssl_client_attr), buf,
2328 (unsigned)max_bytes_to_read);
2331 log_error(LOG_LEVEL_CONNECT,
2332 "Did not receive the whole encrypted request body from %s",
2336 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, (char *)buf, len))
2340 assert(to_read >= len);
2345 log_error(LOG_LEVEL_CONNECT,
2346 "Not enough encrypted request body has been read: expected %lu more bytes",
2351 log_error(LOG_LEVEL_CONNECT,
2352 "The last %llu bytes of the encrypted request body have been read",
2353 csp->expected_client_content_length);
2358 /*********************************************************************
2360 * Function : receive_and_send_encrypted_post_data
2362 * Description : Reads remaining request body from the client and sends
2366 * 1 : csp = Current client state (buffers, headers, etc...)
2368 * Returns : 0 on success, anything else is an error.
2370 *********************************************************************/
2371 static int receive_and_send_encrypted_post_data(struct client_state *csp)
2373 int content_length_known = csp->expected_client_content_length != 0;
2375 while ((content_length_known && csp->expected_client_content_length != 0) ||
2376 (is_ssl_pending(&(csp->ssl_client_attr)) ||
2377 data_is_available(csp->cfd, csp->config->socket_timeout)))
2379 unsigned char buf[BUFFER_SIZE];
2381 int max_bytes_to_read = sizeof(buf);
2383 if (content_length_known && csp->expected_client_content_length < sizeof(buf))
2385 max_bytes_to_read = (int)csp->expected_client_content_length;
2387 log_error(LOG_LEVEL_CONNECT,
2388 "Waiting for up to %d bytes of request body from the client.",
2390 len = ssl_recv_data(&(csp->ssl_client_attr), buf,
2391 (unsigned)max_bytes_to_read);
2398 /* XXX: Does this actually happen? */
2401 log_error(LOG_LEVEL_CONNECT, "Forwarding %d bytes of encrypted request body",
2403 len = ssl_send_data(&(csp->ssl_server_attr), buf, (size_t)len);
2408 if (csp->expected_client_content_length != 0)
2410 if (csp->expected_client_content_length >= len)
2412 csp->expected_client_content_length -= (unsigned)len;
2414 if (csp->expected_client_content_length == 0)
2416 log_error(LOG_LEVEL_CONNECT, "Forwarded the last %d bytes", len);
2422 log_error(LOG_LEVEL_CONNECT, "Done forwarding encrypted request body");
2429 /*********************************************************************
2431 * Function : send_https_request
2433 * Description : Sends the HTTP headers from the client request
2434 * and all the body data that has already been received.
2437 * 1 : csp = Current client state (buffers, headers, etc...)
2439 * Returns : 0 on success, anything else is an error.
2441 *********************************************************************/
2442 static int send_https_request(struct client_state *csp)
2447 const char *to_send;
2449 int filter_client_body = csp->expected_client_content_length != 0 &&
2450 client_body_filters_enabled(csp->action) && can_filter_request_body(csp);
2452 if (filter_client_body)
2454 if (read_https_request_body(csp))
2458 to_send_len = csp->expected_client_content_length;
2459 to_send = execute_client_body_filters(csp, &to_send_len);
2460 if (to_send == NULL)
2462 /* just flush client_iob */
2463 filter_client_body = FALSE;
2465 else if (to_send_len != csp->expected_client_content_length &&
2466 update_client_headers(csp, to_send_len))
2468 log_error(LOG_LEVEL_HEADER, "Error updating client headers");
2471 csp->expected_client_content_length = 0;
2474 hdr = list_to_text(csp->https_headers);
2477 /* FIXME Should handle error properly */
2478 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2480 list_remove_all(csp->https_headers);
2483 * Write the client's (modified) header to the server
2484 * (along with anything else that may be in the buffer)
2486 ret = ssl_send_data(&(csp->ssl_server_attr),
2487 (const unsigned char *)hdr, strlen(hdr));
2492 log_error(LOG_LEVEL_CONNECT,
2493 "Failed sending encrypted request headers to: %s: %E",
2494 csp->http->hostport);
2495 mark_server_socket_tainted(csp);
2499 if (filter_client_body)
2501 ret = ssl_send_data(&(csp->ssl_server_attr), (const unsigned char *)to_send, to_send_len);
2505 log_error(LOG_LEVEL_CONNECT, "Failed sending filtered request body to: %s",
2506 csp->http->hostport);
2511 if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) == 0)
2512 && ((flushed = ssl_flush_socket(&(csp->ssl_server_attr),
2513 csp->client_iob)) < 0))
2515 log_error(LOG_LEVEL_CONNECT, "Failed sending request body to: %s: %E",
2516 csp->http->hostport);
2519 if (flushed != 0 || csp->expected_client_content_length != 0)
2521 if (csp->expected_client_content_length != 0)
2523 if (csp->expected_client_content_length < flushed)
2525 log_error(LOG_LEVEL_ERROR,
2526 "Flushed %ld bytes of request body while only expecting %llu",
2527 flushed, csp->expected_client_content_length);
2528 csp->expected_client_content_length = 0;
2532 log_error(LOG_LEVEL_CONNECT,
2533 "Flushed %ld bytes of request body while expecting %llu",
2534 flushed, csp->expected_client_content_length);
2535 csp->expected_client_content_length -= (unsigned)flushed;
2536 if (receive_and_send_encrypted_post_data(csp))
2544 log_error(LOG_LEVEL_CONNECT,
2545 "Flushed %ld bytes of request body", flushed);
2549 log_error(LOG_LEVEL_CONNECT, "Encrypted request sent");
2556 /*********************************************************************
2558 * Function : receive_encrypted_request_headers
2560 * Description : Receives the encrypted request headers when
2564 * 1 : csp = Current client state (buffers, headers, etc...)
2566 * Returns : JB_ERR_OK on success,
2567 * JB_ERR_PARSE or JB_ERR_MEMORY otherwise
2569 *********************************************************************/
2570 static jb_err receive_encrypted_request_headers(struct client_state *csp)
2572 char buf[BUFFER_SIZE];
2578 log_error(LOG_LEVEL_HEADER, "Waiting for encrypted client headers");
2579 if (!is_ssl_pending(&(csp->ssl_client_attr)) &&
2580 !data_is_available(csp->cfd, csp->config->socket_timeout))
2582 log_error(LOG_LEVEL_CONNECT,
2583 "Socket %d timed out while waiting for client headers", csp->cfd);
2584 return JB_ERR_PARSE;
2586 len = ssl_recv_data(&(csp->ssl_client_attr),
2587 (unsigned char *)buf, sizeof(buf));
2590 log_error(LOG_LEVEL_CONNECT,
2591 "Socket %d closed while waiting for client headers", csp->cfd);
2592 return JB_ERR_PARSE;
2596 return JB_ERR_PARSE;
2598 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
2600 return JB_ERR_MEMORY;
2602 p = strstr(csp->client_iob->cur, "\r\n\r\n");
2603 } while (p == NULL);
2605 log_error(LOG_LEVEL_HEADER, "Encrypted headers received completely");
2611 /*********************************************************************
2613 * Function : change_encrypted_request_destination
2615 * Description : Parse a (rewritten) request line from an encrypted
2616 * request and regenerate the http request data.
2619 * 1 : csp = Current client state (buffers, headers, etc...)
2621 * Returns : Forwards the parse_http_request() return code.
2622 * Terminates in case of memory problems.
2624 *********************************************************************/
2625 static jb_err change_encrypted_request_destination(struct client_state *csp)
2628 char *original_host = csp->http->host;
2629 int original_port = csp->http->port;
2631 log_error(LOG_LEVEL_REDIRECTS, "Rewrite detected: %s",
2632 csp->https_headers->first->str);
2633 csp->http->host = NULL;
2634 free_http_request(csp->http);
2635 err = parse_http_request(csp->https_headers->first->str, csp->http);
2636 if (JB_ERR_OK != err)
2638 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2639 jb_err_to_string(err));
2640 freez(original_host);
2644 if (csp->http->host == NULL)
2646 char port_string[10];
2648 * The rewritten request line did not specify a host
2649 * which means we can use the original host specified
2652 csp->http->host = original_host;
2653 csp->http->port = original_port;
2654 log_error(LOG_LEVEL_REDIRECTS, "Keeping the original host: %s",
2657 * If the rewritten request line didn't contain a host
2658 * it also didn't contain a port so we can reuse the host
2661 freez(csp->http->hostport);
2662 csp->http->hostport = strdup_or_die(csp->http->host);
2663 snprintf(port_string, sizeof(port_string), ":%d", original_port);
2664 err = string_append(&csp->http->hostport, port_string);
2665 if (err != JB_ERR_OK)
2667 log_error(LOG_LEVEL_ERROR, "Failed to rebuild hostport: %s.",
2668 jb_err_to_string(err));
2673 * While the request line didn't mention it,
2674 * we're https-inspecting and want to speak TLS
2677 csp->http->server_ssl = 1;
2682 /* The rewrite filter added a host so we can ditch the original */
2683 freez(original_host);
2684 csp->http->server_ssl = csp->http->ssl;
2687 csp->http->client_ssl = 1;
2689 freez(csp->https_headers->first->str);
2690 build_request_line(csp, NULL, &csp->https_headers->first->str);
2692 if (!server_use_ssl(csp))
2694 log_error(LOG_LEVEL_REDIRECTS,
2695 "Rewritten request line results in downgrade to http");
2697 * Replace the unencryptd headers received with the
2698 * CONNECT request with the ones we received securely.
2700 destroy_list(csp->headers);
2701 csp->headers->first = csp->https_headers->first;
2702 csp->headers->last = csp->https_headers->last;
2703 csp->https_headers->first = NULL;
2704 csp->https_headers->last = NULL;
2712 /*********************************************************************
2714 * Function : process_encrypted_request_headers
2716 * Description : Receives and parses the encrypted headers send
2717 * by the client when https-inspecting.
2720 * 1 : csp = Current client state (buffers, headers, etc...)
2722 * Returns : JB_ERR_OK on success,
2723 * JB_ERR_PARSE or JB_ERR_MEMORY otherwise
2725 *********************************************************************/
2726 static jb_err process_encrypted_request_headers(struct client_state *csp)
2731 /* Temporary copy of the client's headers before they get enlisted in csp->https_headers */
2732 struct list header_list;
2733 struct list *headers = &header_list;
2735 assert(csp->ssl_with_client_is_opened);
2737 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2738 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
2740 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2743 err = receive_encrypted_request_headers(csp);
2744 if (err != JB_ERR_OK)
2746 if (csp->client_iob->cur == NULL ||
2747 csp->client_iob->cur == csp->client_iob->eod)
2750 * We did not receive any data, most likely because the
2751 * client is done. Don't log this as a parse failure.
2753 return JB_ERR_PARSE;
2755 /* XXX: Also used for JB_ERR_MEMORY */
2756 log_error(LOG_LEVEL_ERROR, "Failed to receive encrypted request: %s",
2757 jb_err_to_string(err));
2758 ssl_send_data_delayed(&(csp->ssl_client_attr),
2759 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2763 /* We don't need get_request_line() because the whole HTTP head is buffered. */
2764 request_line = get_header(csp->client_iob);
2765 if (request_line == NULL)
2767 log_error(LOG_LEVEL_ERROR, "Failed to get the encrypted request line");
2768 ssl_send_data_delayed(&(csp->ssl_client_attr),
2769 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2770 return JB_ERR_PARSE;
2772 assert(*request_line != '\0');
2774 if (client_protocol_is_unsupported(csp, request_line))
2777 * If the protocol is unsupported we're done here.
2778 * client_protocol_is_unsupported() took care of sending
2779 * the error response and logging the error message.
2781 return JB_ERR_PARSE;
2784 #ifdef FEATURE_FORCE_LOAD
2785 if (force_required(csp, request_line))
2787 csp->flags |= CSP_FLAG_FORCED;
2789 #endif /* def FEATURE_FORCE_LOAD */
2791 free_http_request(csp->http);
2793 err = parse_http_request(request_line, csp->http);
2794 /* XXX: Restore ssl setting. This is ugly */
2795 csp->http->client_ssl = 1;
2796 csp->http->server_ssl = 1;
2798 freez(request_line);
2799 if (JB_ERR_OK != err)
2801 ssl_send_data_delayed(&(csp->ssl_client_attr),
2802 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2803 /* XXX: Use correct size */
2804 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2805 log_error(LOG_LEVEL_ERROR,
2806 "Couldn't parse request line received from %s: %s",
2807 csp->ip_addr_str, jb_err_to_string(err));
2809 free_http_request(csp->http);
2810 return JB_ERR_PARSE;
2813 /* Parse the rest of the client's headers. */
2817 p = get_header(csp->client_iob);
2821 /* There are no additional headers to read. */
2828 if (JB_ERR_OK != get_destination_from_https_headers(headers, csp->http))
2831 * Our attempts to get the request destination
2834 log_error(LOG_LEVEL_ERROR,
2835 "Failed to get the encrypted request destination");
2836 ssl_send_data_delayed(&(csp->ssl_client_attr),
2837 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2838 destroy_list(headers);
2840 return JB_ERR_PARSE;
2843 /* Split the domain we just got for pattern matching */
2844 init_domain_components(csp->http);
2846 #ifdef FEATURE_CLIENT_TAGS
2847 /* XXX: If the headers were enlisted sooner, passing csp would do. */
2848 if (csp->client_address == NULL)
2850 set_client_address(csp, headers);
2851 get_tag_list_for_client(csp->client_tags, csp->client_address);
2855 #ifdef FEATURE_TOGGLE
2856 if ((csp->flags & CSP_FLAG_TOGGLED_ON) != 0)
2860 * Determine the actions for this request after
2861 * clearing the ones from the previous one.
2863 free_current_action(csp->action);
2864 get_url_actions(csp, csp->http);
2867 enlist(csp->https_headers, csp->http->cmd);
2869 /* Append the previously read headers */
2870 err = list_append_list_unique(csp->https_headers, headers);
2871 destroy_list(headers);
2872 if (JB_ERR_OK != err)
2874 /* XXX: Send error message */
2878 /* XXX: Work around crash */
2879 csp->error_message = NULL;
2881 /* XXX: Why do this here? */
2884 err = sed_https(csp);
2885 if (JB_ERR_OK != err)
2887 ssl_send_data_delayed(&(csp->ssl_client_attr),
2888 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2889 log_error(LOG_LEVEL_ERROR, "Failed to parse client request from %s.",
2891 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
2892 csp->ip_addr_str, csp->http->cmd);
2893 return JB_ERR_PARSE;
2896 if ((NULL == csp->https_headers->first->str)
2897 || (strcmp(csp->http->cmd, csp->https_headers->first->str) &&
2898 (JB_ERR_OK != change_encrypted_request_destination(csp))))
2900 ssl_send_data_delayed(&(csp->ssl_client_attr),
2901 (const unsigned char *)MESSED_UP_REQUEST_RESPONSE,
2902 strlen(MESSED_UP_REQUEST_RESPONSE), get_write_delay(csp));
2903 log_error(LOG_LEVEL_ERROR,
2904 "Invalid request line after applying header filters.");
2905 /* XXX: Use correct size */
2906 log_error(LOG_LEVEL_CLF,
2907 "%s - - [%T] \"Invalid request generated\" 400 0", csp->ip_addr_str);
2909 return JB_ERR_PARSE;
2912 log_error(LOG_LEVEL_HEADER, "Encrypted request headers processed");
2913 log_error(LOG_LEVEL_REQUEST, "https://%s%s", csp->http->hostport,
2920 /*********************************************************************
2922 * Function : cgi_page_requested
2924 * Description : Checks if a request is for an internal CGI page.
2927 * 1 : host = The host requested by the client.
2929 * Returns : 1 if a CGI page has been requested, 0 otherwise
2931 *********************************************************************/
2932 static int cgi_page_requested(const char *host)
2934 if ((0 == strcmpic(host, CGI_SITE_1_HOST))
2935 || (0 == strcmpic(host, CGI_SITE_1_HOST "."))
2936 || (0 == strcmpic(host, CGI_SITE_2_HOST))
2937 || (0 == strcmpic(host, CGI_SITE_2_HOST ".")))
2947 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2948 /*********************************************************************
2950 * Function : continue_https_chat
2952 * Description : Behaves similar to chat() but only deals with
2953 * https-inspected requests that arrive on an already
2954 * established connection. The first request is always
2955 * served by chat() which is a lot more complex as it
2956 * has to deal with forwarding settings and connection
2959 * If a connection to the server has already been
2960 * opened it is reused unless the request is blocked
2961 * or the forwarder changed.
2963 * If a connection to the server has not yet been
2964 * opened (because the previous request was crunched),
2965 * or the forwarder changed, the connection is dropped
2966 * so that the client retries on a fresh one.
2969 * 1 : csp = Current client state (buffers, headers, etc...)
2971 * Returns : Nothing.
2973 *********************************************************************/
2974 static void continue_https_chat(struct client_state *csp)
2976 const struct forward_spec *fwd;
2978 if (JB_ERR_OK != process_encrypted_request_headers(csp))
2980 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2984 #if defined(FEATURE_STATISTICS) && defined(MUTEX_LOCKS_AVAILABLE)
2985 privoxy_mutex_lock(&block_statistics_mutex);
2986 number_of_requests_received++;
2987 privoxy_mutex_unlock(&block_statistics_mutex);
2990 csp->requests_received_total++;
2993 * We have an encrypted request. Check if one of the crunchers wants it.
2995 if (crunch_response_triggered(csp, crunchers_all))
2998 * Yes. The client got the crunch response and we're done here.
3002 if (csp->ssl_with_server_is_opened == 0)
3004 log_error(LOG_LEVEL_CONNECT,
3005 "Dropping the client connection on socket %d. "
3006 "The server connection has not been established yet.",
3008 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
3011 assert(csp->server_connection.sfd != JB_INVALID_SOCKET);
3013 fwd = forward_url(csp, csp->http);
3014 if (!connection_destination_matches(&csp->server_connection, csp->http, fwd))
3016 log_error(LOG_LEVEL_CONNECT,
3017 "Dropping the client connection on socket %d with "
3018 "server socket %d connected to %s. The forwarder has changed.",
3019 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
3020 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
3024 log_applied_actions(csp->action);
3026 log_error(LOG_LEVEL_CONNECT,
3027 "Reusing server socket %d connected to %s. Requests already sent: %u.",
3028 csp->server_connection.sfd, csp->server_connection.host,
3029 csp->server_connection.requests_sent_total);
3031 if (send_https_request(csp))
3034 * Most likely the server connection timed out. We can't easily
3035 * create a new one so simply drop the client connection without a
3036 * error response to let the client retry.
3038 log_error(LOG_LEVEL_CONNECT,
3039 "Dropping client connection on socket %d. "
3040 "Forwarding the encrypted client request failed.",
3044 csp->server_connection.request_sent = time(NULL);
3045 csp->server_connection.requests_sent_total++;
3046 handle_established_connection(csp);
3047 freez(csp->receive_buffer);
3049 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3053 /*********************************************************************
3055 * Function : handle_established_connection
3057 * Description : Shuffle data between client and server once the
3058 * connection has been established and the request
3062 * 1 : csp = Current client state (buffers, headers, etc...)
3064 * Returns : Nothing.
3066 *********************************************************************/
3067 static void handle_established_connection(struct client_state *csp)
3073 struct pollfd poll_fds[2];
3077 struct timeval timeout;
3080 int ms_iis5_hack = 0;
3081 unsigned long long byte_count = 0;
3082 struct http_request *http;
3083 long len = 0; /* for buffer sizes (and negative error codes) */
3084 int buffer_and_filter_content = 0;
3085 unsigned int write_delay;
3086 #ifdef FEATURE_HTTPS_INSPECTION
3088 int use_ssl_tunnel = 0;
3089 csp->dont_verify_certificate = 0;
3091 if (csp->http->ssl && !(csp->action->flags & ACTION_HTTPS_INSPECTION))
3093 /* Pass encrypted content without filtering. */
3098 /* Skeleton for HTTP response, if we should intercept the request */
3099 struct http_response *rsp;
3100 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3101 int watch_client_socket;
3104 csp->receive_buffer_size = csp->config->receive_buffer_size;
3105 csp->receive_buffer = zalloc(csp->receive_buffer_size + 1);
3106 if (csp->receive_buffer == NULL)
3108 log_error(LOG_LEVEL_ERROR,
3109 "Out of memory. Failed to allocate the receive buffer.");
3110 rsp = cgi_error_memory();
3111 send_crunch_response(csp, rsp);
3118 maxfd = (csp->cfd > csp->server_connection.sfd) ?
3119 csp->cfd : csp->server_connection.sfd;
3122 /* pass data between the client and server
3123 * until one or the other shuts down the connection.
3128 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3129 watch_client_socket = 0 == (csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING);
3131 write_delay = get_write_delay(csp);
3135 #ifdef FEATURE_HTTPS_INSPECTION
3136 if (server_use_ssl(csp) && is_ssl_pending(&(csp->ssl_server_attr)))
3139 * It's possible that the TLS library already consumed all the
3140 * data the server intends to send. If that happens poll() and
3141 * select() will no longer see the data as available so we have
3142 * to skip the calls.
3144 goto server_wants_to_talk;
3146 if (watch_client_socket && client_use_ssl(csp) &&
3147 is_ssl_pending(&(csp->ssl_client_attr)))
3150 * The TLS libray may also consume all of the remaining data
3151 * from the client when we're shuffling the data from an
3152 * unbuffered request body to the server.
3154 goto client_wants_to_talk;
3159 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3160 if (!watch_client_socket)
3162 maxfd = csp->server_connection.sfd;
3165 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3167 FD_SET(csp->cfd, &rfds);
3170 FD_SET(csp->server_connection.sfd, &rfds);
3171 #endif /* ndef HAVE_POLL */
3173 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3174 if ((csp->flags & CSP_FLAG_CHUNKED)
3175 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3176 && ((csp->iob->eod - csp->iob->cur) >= 5)
3177 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
3180 * XXX: This check should be obsolete now,
3181 * but let's wait a while to be sure.
3183 log_error(LOG_LEVEL_CONNECT,
3184 "Looks like we got the last chunk together with "
3185 "the server headers but didn't detect it earlier. "
3186 "We better stop reading.");
3187 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
3188 csp->expected_content_length = byte_count;
3189 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
3191 if (server_body && server_response_is_complete(csp, byte_count))
3193 if (csp->expected_content_length == byte_count)
3195 log_error(LOG_LEVEL_CONNECT,
3196 "Done reading from server. Content length: %llu as expected. "
3197 "Bytes most recently read: %ld.",
3202 log_error(LOG_LEVEL_CONNECT,
3203 "Done reading from server. Expected content length: %llu. "
3204 "Actual content length: %llu. Bytes most recently read: %ld.",
3205 csp->expected_content_length, byte_count, len);
3209 * XXX: Should not jump around, handle_established_connection()
3210 * is complicated enough already.
3214 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
3217 poll_fds[0].fd = csp->cfd;
3218 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3219 if (!watch_client_socket)
3222 * Ignore incoming data, but still watch out
3223 * for disconnects etc. These flags are always
3224 * implied anyway but explicitly setting them
3227 poll_fds[0].events = POLLERR|POLLHUP;
3232 poll_fds[0].events = POLLIN;
3234 poll_fds[1].fd = csp->server_connection.sfd;
3235 poll_fds[1].events = POLLIN;
3236 n = poll(poll_fds, 2, csp->config->socket_timeout * 1000);
3238 timeout.tv_sec = csp->config->socket_timeout;
3239 timeout.tv_usec = 0;
3240 n = select((int)maxfd + 1, &rfds, NULL, NULL, &timeout);
3241 #endif /* def HAVE_POLL */
3243 /* Server or client not responding in timeout */
3246 log_error(LOG_LEVEL_CONNECT, "Socket timeout %d reached: %s",
3247 csp->config->socket_timeout, http->url);
3248 if ((byte_count == 0) && (http->ssl == 0))
3250 send_crunch_response(csp, error_response(csp, "connection-timeout"));
3252 mark_server_socket_tainted(csp);
3253 #ifdef FEATURE_HTTPS_INSPECTION
3254 close_client_and_server_ssl_connections(csp);
3261 log_error(LOG_LEVEL_ERROR, "poll() failed!: %E");
3263 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
3265 mark_server_socket_tainted(csp);
3266 #ifdef FEATURE_HTTPS_INSPECTION
3267 close_client_and_server_ssl_connections(csp);
3273 * This is the body of the browser's request,
3274 * just read and write it.
3276 * Receives data from browser and sends it to server
3278 * XXX: Make sure the client doesn't use pipelining
3279 * behind Privoxy's back.
3282 if ((poll_fds[0].revents & (POLLERR|POLLHUP|POLLNVAL)) != 0)
3284 log_error(LOG_LEVEL_CONNECT,
3285 "The client socket %d has become unusable while "
3286 "the server socket %d is still open.",
3287 csp->cfd, csp->server_connection.sfd);
3288 mark_server_socket_tainted(csp);
3292 if (poll_fds[0].revents != 0)
3294 if (FD_ISSET(csp->cfd, &rfds))
3295 #endif /* def HAVE_POLL*/
3297 int max_bytes_to_read;
3299 #ifdef FEATURE_HTTPS_INSPECTION
3300 client_wants_to_talk:
3303 max_bytes_to_read = (int)csp->receive_buffer_size;
3305 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3306 if ((csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
3308 if (data_is_available(csp->cfd, 0))
3311 * If the next request is already waiting, we have
3312 * to stop select()ing the client socket. Otherwise
3313 * we would always return right away and get nothing
3316 watch_client_socket = 0;
3317 log_error(LOG_LEVEL_CONNECT,
3318 "Stop watching client socket %d. "
3319 "There's already another request waiting.",
3324 * If the client socket is set, but there's no data
3325 * available on the socket, the client went fishing
3326 * and continuing talking to the server makes no sense.
3328 log_error(LOG_LEVEL_CONNECT,
3329 "The client closed socket %d while "
3330 "the server socket %d is still open.",
3331 csp->cfd, csp->server_connection.sfd);
3332 mark_server_socket_tainted(csp);
3335 if (csp->expected_client_content_length != 0)
3337 if (csp->expected_client_content_length < csp->receive_buffer_size)
3339 max_bytes_to_read = (int)csp->expected_client_content_length;
3341 log_error(LOG_LEVEL_CONNECT,
3342 "Waiting for up to %d bytes from the client.",
3345 assert(max_bytes_to_read <= csp->receive_buffer_size);
3346 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3348 #ifdef FEATURE_HTTPS_INSPECTION
3349 if (client_use_ssl(csp))
3351 if (csp->http->status == 101)
3353 len = ssl_recv_data(&(csp->ssl_client_attr),
3354 (unsigned char *)csp->receive_buffer,
3355 (size_t)max_bytes_to_read);
3358 log_error(LOG_LEVEL_ERROR, "Failed to receive data "
3359 "on client socket %d for an upgraded connection",
3365 log_error(LOG_LEVEL_CONNECT, "Done receiving data "
3366 "on client socket %d for an upgraded connection",
3370 byte_count += (unsigned long long)len;
3371 len = ssl_send_data(&(csp->ssl_server_attr),
3372 (unsigned char *)csp->receive_buffer, (size_t)len);
3375 log_error(LOG_LEVEL_ERROR, "Failed to send data "
3376 "on server socket %d for an upgraded connection",
3377 csp->server_connection.sfd);
3382 log_error(LOG_LEVEL_CONNECT, "Breaking with TLS/SSL.");
3386 #endif /* def FEATURE_HTTPS_INSPECTION */
3388 len = read_socket(csp->cfd, csp->receive_buffer, max_bytes_to_read);
3392 /* XXX: not sure if this is necessary. */
3393 mark_server_socket_tainted(csp);
3394 break; /* "game over, man" */
3397 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3398 if (csp->expected_client_content_length != 0)
3400 assert(len <= max_bytes_to_read);
3401 csp->expected_client_content_length -= (unsigned)len;
3402 log_error(LOG_LEVEL_CONNECT,
3403 "Expected client content length set to %llu "
3404 "after reading %ld bytes.",
3405 csp->expected_client_content_length, len);
3406 if (csp->expected_client_content_length == 0)
3408 log_error(LOG_LEVEL_CONNECT,
3409 "Done reading from the client.");
3410 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
3413 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3415 if (write_socket(csp->server_connection.sfd, csp->receive_buffer, (size_t)len))
3417 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
3418 mark_server_socket_tainted(csp);
3426 * The server wants to talk. It could be the header or the body.
3427 * If `hdr' is null, then it's the header otherwise it's the body.
3428 * FIXME: Does `hdr' really mean `host'? No.
3431 if (poll_fds[1].revents != 0)
3433 if (FD_ISSET(csp->server_connection.sfd, &rfds))
3434 #endif /* HAVE_POLL */
3436 #ifdef FEATURE_HTTPS_INSPECTION
3437 server_wants_to_talk:
3439 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3441 * If we are buffering content, we don't want to eat up to
3442 * buffer-limit bytes if the client no longer cares about them.
3443 * If we aren't buffering, however, a dead client socket will be
3444 * noticed pretty much right away anyway, so we can reduce the
3445 * overhead by skipping the check.
3447 if (buffer_and_filter_content && !socket_is_still_alive(csp->cfd))
3450 log_error(LOG_LEVEL_CONNECT,
3451 "The server still wants to talk, but the client may already have hung up on us.");
3453 log_error(LOG_LEVEL_CONNECT,
3454 "The server still wants to talk, but the client hung up on us.");
3455 mark_server_socket_tainted(csp);
3456 #ifdef FEATURE_HTTPS_INSPECTION
3457 close_client_and_server_ssl_connections(csp);
3460 #endif /* def _WIN32 */
3462 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3464 #ifdef FEATURE_HTTPS_INSPECTION
3466 * Reading data from standard or secured connection (HTTP/HTTPS)
3468 if (server_use_ssl(csp))
3470 len = ssl_recv_data(&(csp->ssl_server_attr),
3471 (unsigned char *)csp->receive_buffer, csp->receive_buffer_size);
3476 len = read_socket(csp->server_connection.sfd, csp->receive_buffer,
3477 (int)csp->receive_buffer_size);
3482 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
3484 if ((http->ssl && (csp->fwd == NULL))
3485 #ifdef FEATURE_HTTPS_INSPECTION
3491 * Just hang up. We already confirmed the client's CONNECT
3492 * request with status code 200 and unencrypted content is
3493 * no longer welcome.
3495 log_error(LOG_LEVEL_ERROR,
3496 "CONNECT already confirmed. Unable to tell the client about the problem.");
3499 else if (byte_count)
3502 * Just hang up. We already transmitted the original headers
3503 * and parts of the original content and therefore missed the
3504 * chance to send an error message (without risking data corruption).
3506 * XXX: we could retry with a fancy range request here.
3508 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
3509 "Unable to tell the client about the problem.");
3510 mark_server_socket_tainted(csp);
3511 #ifdef FEATURE_HTTPS_INSPECTION
3512 close_client_and_server_ssl_connections(csp);
3517 * XXX: Consider handling the cases above the same.
3519 mark_server_socket_tainted(csp);
3523 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3524 if (csp->flags & CSP_FLAG_CHUNKED)
3526 if ((len >= 5) && !memcmp(csp->receive_buffer+len-5, "0\r\n\r\n", 5))
3528 /* XXX: this is a temporary hack */
3529 log_error(LOG_LEVEL_CONNECT,
3530 "Looks like we reached the end of the last chunk. "
3531 "We better stop reading.");
3532 csp->expected_content_length = byte_count + (unsigned long long)len;
3533 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
3537 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
3540 * This is guaranteed by allocating with zalloc_or_die()
3541 * and never (intentionally) writing to the last byte.
3543 * csp->receive_buffer_size is the size of the part of the
3544 * buffer we intentionally write to, but we actually
3545 * allocated csp->receive_buffer_size+1 bytes so the assertion
3546 * stays within the allocated range.
3548 assert(csp->receive_buffer[csp->receive_buffer_size] == '\0');
3551 * Add a trailing zero to let be able to use string operations.
3552 * XXX: do we still need this with filter_popups gone?
3554 assert(len <= csp->receive_buffer_size);
3555 csp->receive_buffer[len] = '\0';
3558 * Normally, this would indicate that we've read
3559 * as much as the server has sent us and we can
3560 * close the client connection. However, Microsoft
3561 * in its wisdom has released IIS/5 with a bug that
3562 * prevents it from sending the trailing \r\n in
3563 * a 302 redirect header (and possibly other headers).
3564 * To work around this if we've haven't parsed
3565 * a full header we'll append a trailing \r\n
3566 * and see if this now generates a valid one.
3568 * This hack shouldn't have any impacts. If we've
3569 * already transmitted the header or if this is a
3570 * SSL connection, then we won't bother with this
3571 * hack. So we only work on partially received
3572 * headers. If we append a \r\n and this still
3573 * doesn't generate a valid header, then we won't
3574 * transmit anything to the client.
3579 if (server_body || (http->ssl
3580 #ifdef FEATURE_HTTPS_INSPECTION
3586 * If we have been buffering up the document,
3587 * now is the time to apply content modification
3588 * and send the result to the client.
3590 if (buffer_and_filter_content)
3592 p = execute_content_filters(csp);
3594 * If content filtering fails, use the original
3595 * buffer and length.
3596 * (see p != NULL ? p : csp->iob->cur below)
3600 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
3602 #ifdef FEATURE_COMPRESSION
3603 else if ((csp->flags & CSP_FLAG_CLIENT_SUPPORTS_DEFLATE)
3604 && (csp->content_length > LOWER_LENGTH_LIMIT_FOR_COMPRESSION))
3606 char *compressed_content = compress_buffer(p,
3607 (size_t *)&csp->content_length, csp->config->compression_level);
3608 if (compressed_content != NULL)
3611 p = compressed_content;
3612 csp->flags |= CSP_FLAG_BUFFERED_CONTENT_DEFLATED;
3617 if (JB_ERR_OK != update_server_headers(csp))
3619 log_error(LOG_LEVEL_FATAL,
3620 "Failed to update server headers. after filtering.");
3623 hdr = list_to_text(csp->headers);
3626 /* FIXME Should handle error properly */
3627 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3630 #ifdef FEATURE_HTTPS_INSPECTION
3632 * Sending data with standard or secured connection (HTTP/HTTPS)
3634 if (client_use_ssl(csp))
3636 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
3637 (const unsigned char *)hdr, strlen(hdr),
3638 get_write_delay(csp)) < 0)
3639 || (ssl_send_data_delayed(&(csp->ssl_client_attr),
3640 (const unsigned char *) ((p != NULL) ? p : csp->iob->cur),
3641 csp->content_length, get_write_delay(csp)) < 0))
3643 log_error(LOG_LEVEL_ERROR,
3644 "Failed to send the modified content to the client over TLS");
3647 mark_server_socket_tainted(csp);
3648 close_client_and_server_ssl_connections(csp);
3653 #endif /* def FEATURE_HTTPS_INSPECTION */
3655 if (write_socket_delayed(csp->cfd, hdr, strlen(hdr), write_delay)
3656 || write_socket_delayed(csp->cfd, ((p != NULL) ? p : csp->iob->cur),
3657 (size_t)csp->content_length, write_delay))
3659 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
3662 mark_server_socket_tainted(csp);
3671 break; /* "game over, man" */
3675 * This is not the body, so let's pretend the server just sent
3678 snprintf(csp->receive_buffer, csp->receive_buffer_size, "\r\n");
3679 len = (int)strlen(csp->receive_buffer);
3682 * Now, let the normal header parsing algorithm below do its
3683 * job. If it fails, we'll exit instead of continuing.
3690 * If we're in the body of the server document, just write it to
3691 * the client, unless we need to buffer the body for later
3692 * content-filtering.
3694 if (server_body || (http->ssl
3695 #ifdef FEATURE_HTTPS_INSPECTION
3700 if (buffer_and_filter_content)
3703 * If there is no memory left for buffering the content, or the buffer limit
3704 * has been reached, switch to non-filtering mode, i.e. make & write the
3705 * header, flush the iob and buf, and get out of the way.
3707 if (add_to_iob(csp->iob, csp->config->buffer_limit, csp->receive_buffer, len))
3712 log_error(LOG_LEVEL_INFO,
3713 "Flushing header and buffers. Stepping back from filtering.");
3715 hdr = list_to_text(csp->headers);
3719 * Memory is too tight to even generate the header.
3720 * Send our static "Out-of-memory" page.
3722 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
3723 rsp = cgi_error_memory();
3724 send_crunch_response(csp, rsp);
3725 mark_server_socket_tainted(csp);
3726 #ifdef FEATURE_HTTPS_INSPECTION
3727 close_client_and_server_ssl_connections(csp);
3731 hdrlen = strlen(hdr);
3733 #ifdef FEATURE_HTTPS_INSPECTION
3735 * Sending data with standard or secured connection (HTTP/HTTPS)
3737 if (client_use_ssl(csp))
3739 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
3740 (const unsigned char *)hdr, hdrlen, get_write_delay(csp)) < 0)
3741 || ((flushed = ssl_flush_socket(&(csp->ssl_client_attr),
3743 || (ssl_send_data_delayed(&(csp->ssl_client_attr),
3744 (const unsigned char *)csp->receive_buffer, (size_t)len,
3745 get_write_delay(csp)) < 0))
3747 log_error(LOG_LEVEL_CONNECT,
3748 "Flush header and buffers to client failed");
3750 mark_server_socket_tainted(csp);
3751 close_client_and_server_ssl_connections(csp);
3756 #endif /* def FEATURE_HTTPS_INSPECTION */
3758 if (write_socket_delayed(csp->cfd, hdr, hdrlen, write_delay)
3759 || ((flushed = flush_iob(csp->cfd, csp->iob, write_delay)) < 0)
3760 || write_socket_delayed(csp->cfd, csp->receive_buffer, (size_t)len,
3763 log_error(LOG_LEVEL_CONNECT,
3764 "Flush header and buffers to client failed: %E");
3766 mark_server_socket_tainted(csp);
3772 * Reset the byte_count to the amount of bytes
3773 * we just flushed. len will be added a few lines below,
3774 * hdrlen doesn't matter for LOG_LEVEL_CLF.
3776 byte_count = (unsigned long long)flushed;
3778 buffer_and_filter_content = 0;
3784 #ifdef FEATURE_HTTPS_INSPECTION
3786 * Sending data with standard or secured connection (HTTP/HTTPS)
3788 if (client_use_ssl(csp))
3790 ret = ssl_send_data_delayed(&(csp->ssl_client_attr),
3791 (const unsigned char *)csp->receive_buffer, (size_t)len,
3792 get_write_delay(csp));
3795 log_error(LOG_LEVEL_ERROR,
3796 "Sending data to client failed");
3797 mark_server_socket_tainted(csp);
3798 close_client_and_server_ssl_connections(csp);
3803 #endif /* def FEATURE_HTTPS_INSPECTION */
3805 if (write_socket_delayed(csp->cfd, csp->receive_buffer,
3806 (size_t)len, write_delay))
3808 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
3809 mark_server_socket_tainted(csp);
3814 byte_count += (unsigned long long)len;
3820 * We're still looking for the end of the server's header.
3821 * Buffer up the data we just read. If that fails, there's
3822 * little we can do but send our static out-of-memory page.
3824 if (add_to_iob(csp->iob, csp->config->buffer_limit, csp->receive_buffer, len))
3826 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
3827 rsp = cgi_error_memory();
3828 send_crunch_response(csp, rsp);
3829 mark_server_socket_tainted(csp);
3830 #ifdef FEATURE_HTTPS_INSPECTION
3831 close_client_and_server_ssl_connections(csp);
3836 /* Convert iob into something sed() can digest */
3837 if (JB_ERR_PARSE == get_server_headers(csp))
3842 * Well, we tried our MS IIS/5 hack and it didn't work.
3843 * The header is incomplete and there isn't anything
3844 * we can do about it.
3846 log_error(LOG_LEVEL_ERROR, "Invalid server headers. "
3847 "Applying the MS IIS5 hack didn't help.");
3848 log_error(LOG_LEVEL_CLF,
3849 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3850 #ifdef FEATURE_HTTPS_INSPECTION
3852 * Sending data with standard or secured connection (HTTP/HTTPS)
3854 if (client_use_ssl(csp))
3856 ssl_send_data_delayed(&(csp->ssl_client_attr),
3857 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3858 strlen(INVALID_SERVER_HEADERS_RESPONSE), get_write_delay(csp));
3861 #endif /* def FEATURE_HTTPS_INSPECTION */
3863 write_socket_delayed(csp->cfd,
3864 INVALID_SERVER_HEADERS_RESPONSE,
3865 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
3867 mark_server_socket_tainted(csp);
3868 #ifdef FEATURE_HTTPS_INSPECTION
3869 close_client_and_server_ssl_connections(csp);
3876 * Since we have to wait for more from the server before
3877 * we can parse the headers we just continue here.
3879 log_error(LOG_LEVEL_CONNECT,
3880 "Continuing buffering server headers from socket %d. "
3881 "Bytes most recently read: %ld.", csp->cfd, len);
3888 * Account for the content bytes we
3889 * might have gotten with the headers.
3891 assert(csp->iob->eod >= csp->iob->cur);
3892 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
3895 /* Did we actually get anything? */
3896 if (NULL == csp->headers->first)
3898 if ((csp->flags & CSP_FLAG_REUSED_CLIENT_CONNECTION))
3900 log_error(LOG_LEVEL_ERROR,
3901 "No server or forwarder response received on socket %d. "
3902 "Closing client socket %d without sending data.",
3903 csp->server_connection.sfd, csp->cfd);
3904 log_error(LOG_LEVEL_CLF,
3905 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3909 log_error(LOG_LEVEL_ERROR,
3910 "No server or forwarder response received on socket %d.",
3911 csp->server_connection.sfd);
3912 send_crunch_response(csp, error_response(csp, "no-server-data"));
3914 free_http_request(http);
3915 mark_server_socket_tainted(csp);
3916 #ifdef FEATURE_HTTPS_INSPECTION
3917 close_client_and_server_ssl_connections(csp);
3922 if (!csp->headers->first->str)
3924 log_error(LOG_LEVEL_ERROR, "header search: csp->headers->first->str == NULL, assert will be called");
3926 assert(csp->headers->first->str);
3928 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3929 strncmpic(csp->headers->first->str, "ICY", 3))
3932 * It doesn't look like a HTTP (or Shoutcast) response:
3933 * tell the client and log the problem.
3935 if (strlen(csp->headers->first->str) > 30)
3937 csp->headers->first->str[30] = '\0';
3939 log_error(LOG_LEVEL_ERROR,
3940 "Invalid server or forwarder response. Starts with: %s",
3941 csp->headers->first->str);
3942 log_error(LOG_LEVEL_CLF,
3943 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3944 #ifdef FEATURE_HTTPS_INSPECTION
3946 * Sending data with standard or secured connection (HTTP/HTTPS)
3948 if (client_use_ssl(csp))
3950 ssl_send_data_delayed(&(csp->ssl_client_attr),
3951 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3952 strlen(INVALID_SERVER_HEADERS_RESPONSE),
3953 get_write_delay(csp));
3956 #endif /* def FEATURE_HTTPS_INSPECTION */
3958 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3959 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
3961 free_http_request(http);
3962 mark_server_socket_tainted(csp);
3963 #ifdef FEATURE_HTTPS_INSPECTION
3964 close_client_and_server_ssl_connections(csp);
3970 * Disable redirect checkers, so that they will be only run
3971 * again if the user also enables them through tags.
3973 * From a performance point of view it doesn't matter,
3974 * but it prevents duplicated log messages.
3976 #ifdef FEATURE_FAST_REDIRECTS
3977 csp->action->flags &= ~ACTION_FAST_REDIRECTS;
3979 csp->action->flags &= ~ACTION_REDIRECT;
3982 * We have now received the entire server header,
3983 * filter it and send the result to the client
3985 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3987 log_error(LOG_LEVEL_CLF,
3988 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3989 #ifdef FEATURE_HTTPS_INSPECTION
3991 * Sending data with standard or secured connection (HTTP/HTTPS)
3993 if (client_use_ssl(csp))
3995 ssl_send_data_delayed(&(csp->ssl_client_attr),
3996 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3997 strlen(INVALID_SERVER_HEADERS_RESPONSE),
3998 get_write_delay(csp));
4003 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
4004 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
4006 free_http_request(http);
4007 mark_server_socket_tainted(csp);
4008 #ifdef FEATURE_HTTPS_INSPECTION
4009 close_client_and_server_ssl_connections(csp);
4013 hdr = list_to_text(csp->headers);
4016 /* FIXME Should handle error properly */
4017 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
4020 if ((csp->flags & CSP_FLAG_CHUNKED)
4021 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
4022 && ((csp->iob->eod - csp->iob->cur) >= 5)
4023 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
4025 log_error(LOG_LEVEL_CONNECT,
4026 "Looks like we got the last chunk together with "
4027 "the server headers. We better stop reading.");
4028 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
4029 csp->expected_content_length = byte_count;
4030 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
4033 csp->server_connection.response_received = time(NULL);
4035 if (crunch_response_triggered(csp, crunchers_light))
4038 * One of the tags created by a server-header
4039 * tagger triggered a crunch. We already
4040 * delivered the crunch response to the client
4041 * and are done here after cleaning up.
4044 mark_server_socket_tainted(csp);
4045 #ifdef FEATURE_HTTPS_INSPECTION
4046 close_client_and_server_ssl_connections(csp);
4051 /* Buffer and pcrs filter this if appropriate. */
4052 buffer_and_filter_content = content_requires_filtering(csp);
4054 if (!buffer_and_filter_content)
4057 * Write the server's (modified) header to
4058 * the client (along with anything else that
4059 * may be in the buffer). Use standard or secured
4062 #ifdef FEATURE_HTTPS_INSPECTION
4063 if (client_use_ssl(csp))
4065 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
4066 (const unsigned char *)hdr, strlen(hdr),
4067 get_write_delay(csp)) < 0)
4068 || ((len = ssl_flush_socket(&(csp->ssl_client_attr),
4071 log_error(LOG_LEVEL_CONNECT, "Write header to client failed");
4074 * The write failed, so don't bother mentioning it
4075 * to the client... it probably can't hear us anyway.
4078 mark_server_socket_tainted(csp);
4079 #ifdef FEATURE_HTTPS_INSPECTION
4080 close_client_and_server_ssl_connections(csp);
4086 #endif /* def FEATURE_HTTPS_INSPECTION */
4088 if (write_socket_delayed(csp->cfd, hdr, strlen(hdr), write_delay)
4089 || ((len = flush_iob(csp->cfd, csp->iob, write_delay)) < 0))
4091 log_error(LOG_LEVEL_ERROR,
4092 "write header to client failed");
4094 * The write failed, so don't bother mentioning it
4095 * to the client... it probably can't hear us anyway.
4098 mark_server_socket_tainted(csp);
4104 /* we're finished with the server's header */
4110 * If this was a MS IIS/5 hack then it means the server
4111 * has already closed the connection. Nothing more to read.
4116 log_error(LOG_LEVEL_ERROR,
4117 "Closed server connection detected. "
4118 "Applying the MS IIS5 hack didn't help.");
4119 log_error(LOG_LEVEL_CLF,
4120 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
4121 #ifdef FEATURE_HTTPS_INSPECTION
4123 * Sending data with standard or secured connection (HTTP/HTTPS)
4125 if (client_use_ssl(csp))
4127 ssl_send_data_delayed(&(csp->ssl_client_attr),
4128 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
4129 strlen(INVALID_SERVER_HEADERS_RESPONSE),
4130 get_write_delay(csp));
4133 #endif /* def FEATURE_HTTPS_INSPECTION */
4135 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
4136 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
4138 mark_server_socket_tainted(csp);
4139 #ifdef FEATURE_HTTPS_INSPECTION
4140 close_client_and_server_ssl_connections(csp);
4147 mark_server_socket_tainted(csp);
4148 #ifdef FEATURE_HTTPS_INSPECTION
4149 close_client_and_server_ssl_connections(csp);
4151 return; /* huh? we should never get here */
4154 if (csp->content_length == 0)
4157 * If Privoxy didn't recalculate the Content-Length,
4158 * byte_count is still correct.
4160 csp->content_length = byte_count;
4163 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4164 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
4165 && (csp->expected_content_length != byte_count))
4167 log_error(LOG_LEVEL_CONNECT,
4168 "Received %llu bytes while expecting %llu.",
4169 byte_count, csp->expected_content_length);
4170 mark_server_socket_tainted(csp);
4174 #ifdef FEATURE_HTTPS_INSPECTION
4175 if (client_use_ssl(csp))
4177 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s https://%s%s %s\" 200 %llu",
4178 csp->ip_addr_str, http->gpc, http->hostport, http->path,
4179 http->version, csp->content_length);
4184 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
4185 csp->ip_addr_str, http->ocmd, csp->content_length);
4187 csp->server_connection.timestamp = time(NULL);
4191 /*********************************************************************
4195 * Description : Once a connection from the client has been accepted,
4196 * this function is called (via serve()) to handle the
4197 * main business of the communication. This function
4198 * returns after dealing with a single request. It can
4199 * be called multiple times with the same client socket
4200 * if the client is keeping the connection alive.
4202 * The decision whether or not a client connection will
4203 * be kept alive is up to the caller which also must
4204 * close the client socket when done.
4206 * FIXME: chat is nearly thousand lines long.
4210 * 1 : csp = Current client state (buffers, headers, etc...)
4212 * Returns : Nothing.
4214 *********************************************************************/
4215 static void chat(struct client_state *csp)
4217 const struct forward_spec *fwd;
4218 struct http_request *http;
4219 /* Skeleton for HTTP response, if we should intercept the request */
4220 struct http_response *rsp;
4221 #ifdef FEATURE_HTTPS_INSPECTION
4222 int use_ssl_tunnel = 0;
4227 if (receive_client_request(csp) != JB_ERR_OK)
4232 #if defined(FEATURE_STATISTICS) && defined(MUTEX_LOCKS_AVAILABLE)
4233 privoxy_mutex_lock(&block_statistics_mutex);
4234 number_of_requests_received++;
4235 privoxy_mutex_unlock(&block_statistics_mutex);
4238 if (parse_client_request(csp) != JB_ERR_OK)
4243 #ifdef FEATURE_HTTPS_INSPECTION
4245 * Setting flags to use old solution with SSL tunnel and to disable
4246 * certificate verification.
4248 if (csp->http->ssl && !(csp->action->flags & ACTION_HTTPS_INSPECTION)
4249 && !cgi_page_requested(csp->http->host))
4254 if (http->ssl && (csp->action->flags & ACTION_IGNORE_CERTIFICATE_ERRORS))
4256 csp->dont_verify_certificate = 1;
4261 * build the http request to send to the server
4262 * we have to do one of the following:
4264 * create = use the original HTTP request to create a new
4265 * HTTP request that has either the path component
4266 * without the http://domainspec (w/path) or the
4267 * full orininal URL (w/url)
4268 * Note that the path and/or the HTTP version may
4269 * have been altered by now.
4271 * SSL proxy = Open a socket to the host:port of the server
4272 * and create TLS/SSL connection with server and
4273 * with client. Then behave like mediator between
4274 * client and server over TLS/SSL.
4276 * SSL proxy = Pass the request unchanged if forwarding a CONNECT
4277 * with request to a parent proxy. Note that we'll be sending
4278 * forwarding the CFAIL message ourselves if connecting to the parent
4279 * fails, but we won't send a CSUCCEED message if it works,
4280 * since that would result in a double message (ours and the
4281 * parent's). After sending the request to the parent, we
4282 * must parse answer and send it to client. If connection
4283 * with server is established, we do TLS/SSL proxy. Otherwise
4284 * we send parent response to client and close connections.
4286 * here's the matrix:
4289 * +--------+--------+
4291 * 0 | create | SSL |
4292 * | w/path | proxy |
4293 * Forwarding +--------+--------+
4295 * 1 | create | proxy |
4296 * | w/url |+forward|
4297 * +--------+--------+
4301 #ifdef FEATURE_HTTPS_INSPECTION
4303 * Presetting SSL client and server flags
4305 if (http->ssl && !use_ssl_tunnel)
4307 http->client_ssl = 1;
4308 http->server_ssl = 1;
4312 http->client_ssl = 0;
4313 http->server_ssl = 0;
4317 #ifdef FEATURE_HTTPS_INSPECTION
4319 * Log the request unless we're https inspecting
4320 * in which case we don't have the path yet and
4321 * will log the request later.
4323 if (!client_use_ssl(csp))
4326 log_error(LOG_LEVEL_REQUEST, "%s%s", http->hostport, http->path);
4329 if (http->ssl && connect_port_is_forbidden(csp))
4331 const char *acceptable_connect_ports =
4332 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
4333 assert(NULL != acceptable_connect_ports);
4334 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
4335 "limit-connect{%s} doesn't allow CONNECT requests to %s",
4336 csp->ip_addr_str, acceptable_connect_ports, csp->http->hostport);
4337 csp->action->flags |= ACTION_BLOCK;
4339 #ifdef FEATURE_HTTPS_INSPECTION
4340 http->client_ssl = 0;
4341 http->server_ssl = 0;
4346 * We have a request. Check if one of the crunchers wants it
4347 * unless the client wants to use TLS/SSL in which case we
4348 * haven't setup the TLS context yet and will send the crunch
4352 #ifdef FEATURE_HTTPS_INSPECTION
4353 !client_use_ssl(csp) &&
4355 crunch_response_triggered(csp, crunchers_all))
4358 * Yes. The client got the crunch response and we're done here.
4363 #ifdef FEATURE_HTTPS_INSPECTION
4364 if (client_use_ssl(csp) && !use_ssl_tunnel)
4368 * Creating a SSL proxy.
4370 * By sending the CSUCCEED message we're lying to the client as
4371 * the connection hasn't actually been established yet. We don't
4372 * establish the connection until we have seen and parsed the
4373 * encrypted client headers.
4375 if (write_socket_delayed(csp->cfd, CSUCCEED,
4376 strlen(CSUCCEED), get_write_delay(csp)) != 0)
4378 log_error(LOG_LEVEL_ERROR, "Sending SUCCEED to client failed");
4382 ret = create_client_ssl_connection(csp);
4385 log_error(LOG_LEVEL_ERROR,
4386 "Failed to open a secure connection with the client");
4389 if (JB_ERR_OK != process_encrypted_request_headers(csp))
4391 close_client_ssl_connection(csp);
4395 * We have an encrypted request. Check if one of the crunchers now
4396 * wants it (for example because the previously invisible path was
4397 * required to match).
4399 if (crunch_response_triggered(csp, crunchers_all))
4402 * Yes. The client got the crunch response and we're done here.
4409 log_applied_actions(csp->action);
4411 /* decide how to route the HTTP request */
4412 fwd = forward_url(csp, http);
4414 freez(csp->headers->first->str);
4415 build_request_line(csp, fwd, &csp->headers->first->str);
4417 if (fwd->forward_host)
4419 log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
4420 fwd->forward_host, fwd->forward_port, http->hostport);
4424 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
4427 /* here we connect to the server, gateway, or the forwarder */
4429 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4430 if ((csp->server_connection.sfd != JB_INVALID_SOCKET)
4431 && socket_is_still_alive(csp->server_connection.sfd)
4432 && connection_destination_matches(&csp->server_connection, http, fwd))
4434 log_error(LOG_LEVEL_CONNECT,
4435 "Reusing server socket %d connected to %s. Total requests: %u.",
4436 csp->server_connection.sfd, csp->server_connection.host,
4437 csp->server_connection.requests_sent_total);
4441 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
4443 #ifdef FEATURE_CONNECTION_SHARING
4444 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING
4445 #ifdef FEATURE_HTTPS_INSPECTION
4446 && !server_use_ssl(csp)
4450 remember_connection(&csp->server_connection);
4453 #endif /* def FEATURE_CONNECTION_SHARING */
4455 log_error(LOG_LEVEL_CONNECT,
4456 "Closing server socket %d connected to %s. Total requests: %u.",
4457 csp->server_connection.sfd, csp->server_connection.host,
4458 csp->server_connection.requests_sent_total);
4459 close_socket(csp->server_connection.sfd);
4461 mark_connection_closed(&csp->server_connection);
4463 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4466 * Connecting to destination server
4468 csp->server_connection.sfd = forwarded_connect(fwd, http, csp);
4470 if (csp->server_connection.sfd == JB_INVALID_SOCKET)
4472 if (fwd->type != SOCKS_NONE)
4475 rsp = error_response(csp, "forwarding-failed");
4477 else if (errno == EINVAL)
4479 rsp = error_response(csp, "no-such-domain");
4483 rsp = error_response(csp, "connect-failed");
4486 /* Write the answer to the client */
4489 send_crunch_response(csp, rsp);
4493 * Temporary workaround to prevent already-read client
4494 * bodies from being parsed as new requests. For now we
4495 * err on the safe side and throw all the following
4496 * requests under the bus, even if no client body has been
4497 * buffered. A compliant client will repeat the dropped
4498 * requests on an untainted connection.
4500 * The proper fix is to discard the no longer needed
4501 * client body in the buffer (if there is one) and to
4502 * continue parsing the bytes that follow.
4504 #ifdef FEATURE_HTTPS_INSPECTION
4505 close_client_ssl_connection(csp);
4507 drain_and_close_socket(csp->cfd);
4508 csp->cfd = JB_INVALID_SOCKET;
4513 #ifdef FEATURE_HTTPS_INSPECTION
4515 * Creating TLS/SSL connections with destination server or parent
4516 * proxy. If forwarding is enabled, we must send client request to
4517 * parent proxy and receive, parse and resend parent proxy answer.
4519 if (http->ssl && !use_ssl_tunnel)
4521 if (fwd->forward_host != NULL)
4523 char server_response[BUFFER_SIZE];
4526 char *hdr = list_to_text(csp->headers);
4527 memset(server_response, 0, sizeof(server_response));
4531 log_error(LOG_LEVEL_FATAL,
4532 "Out of memory parsing client header");
4534 list_remove_all(csp->headers);
4537 * Sending client's CONNECT request to the parent proxy
4539 ret = write_socket(csp->server_connection.sfd, hdr, strlen(hdr));
4545 log_error(LOG_LEVEL_CONNECT,
4546 "Sending request headers to: %s failed", http->hostport);
4547 mark_server_socket_tainted(csp);
4548 close_client_ssl_connection(csp);
4552 /* Waiting for parent proxy server response */
4553 len = read_socket(csp->server_connection.sfd, server_response,
4554 sizeof(server_response)-1);
4558 log_error(LOG_LEVEL_ERROR, "No response from parent proxy "
4559 "server on socket %d.", csp->server_connection.sfd);
4561 rsp = error_response(csp, "no-server-data");
4564 send_crunch_response(csp, rsp);
4566 mark_server_socket_tainted(csp);
4567 close_client_ssl_connection(csp);
4572 * Test if the connection to the destination server was
4573 * established successfully by the parent proxy.
4575 if (!tunnel_established_successfully(server_response, (unsigned int)len))
4577 log_error(LOG_LEVEL_ERROR,
4578 "The forwarder %s failed to establish a connection with %s",
4579 fwd->forward_host, http->host);
4580 rsp = error_response(csp, "connect-failed");
4583 send_crunch_response(csp, rsp);
4585 mark_server_socket_tainted(csp);
4586 close_client_ssl_connection(csp);
4589 } /* -END- if (fwd->forward_host != NULL) */
4592 * We can now create the TLS/SSL connection with the destination server.
4594 int ret = create_server_ssl_connection(csp);
4597 if (csp->server_cert_verification_result != SSL_CERT_VALID &&
4598 csp->server_cert_verification_result != SSL_CERT_NOT_VERIFIED)
4601 * If the server certificate is invalid, we must inform
4602 * the client and then close connection to the client.
4604 ssl_send_certificate_error(csp);
4605 close_client_and_server_ssl_connections(csp);
4608 if (csp->server_cert_verification_result == SSL_CERT_NOT_VERIFIED
4609 || csp->server_cert_verification_result == SSL_CERT_VALID)
4612 * The TLS/SSL connection wasn't created but an invalid
4613 * certificate wasn't detected. Report it as connection
4616 rsp = error_response(csp, "connect-failed");
4619 send_crunch_response(csp, rsp);
4621 close_client_and_server_ssl_connections(csp);
4625 }/* -END- if (http->ssl) */
4626 #endif /* def FEATURE_HTTPS_INSPECTION */
4628 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4629 save_connection_destination(csp->server_connection.sfd,
4630 http, fwd, &csp->server_connection);
4631 csp->server_connection.keep_alive_timeout =
4632 (unsigned)csp->config->keep_alive_timeout;
4634 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4636 csp->server_connection.requests_sent_total++;
4638 if ((fwd->type == SOCKS_5T) && (NULL == csp->headers->first))
4640 /* Client headers have been sent optimistically */
4641 assert(csp->headers->last == NULL);
4643 else if (http->ssl == 0 || (fwd->forward_host
4644 #ifdef FEATURE_HTTPS_INSPECTION
4649 if (send_http_request(csp))
4651 rsp = error_response(csp, "connect-failed");
4654 send_crunch_response(csp, rsp);
4662 * Using old solution with SSL tunnel or new solution with SSL proxy
4664 list_remove_all(csp->headers);
4665 #ifdef FEATURE_HTTPS_INSPECTION
4670 * We're running an SSL tunnel and we're not forwarding,
4671 * so just ditch the client headers, send the "connect succeeded"
4672 * message to the client, flush the rest, and get out of the way.
4674 if (write_socket_delayed(csp->cfd, CSUCCEED,
4675 strlen(CSUCCEED), get_write_delay(csp)))
4680 #ifdef FEATURE_HTTPS_INSPECTION
4684 * If server certificate has been verified and is invalid,
4685 * we must inform the client and then close the connection
4686 * with client and server.
4688 if (csp->server_cert_verification_result != SSL_CERT_VALID &&
4689 csp->server_cert_verification_result != SSL_CERT_NOT_VERIFIED)
4691 ssl_send_certificate_error(csp);
4692 close_client_and_server_ssl_connections(csp);
4695 if (send_https_request(csp))
4697 rsp = error_response(csp, "connect-failed");
4700 send_crunch_response(csp, rsp);
4702 close_client_and_server_ssl_connections(csp);
4706 #endif /* def FEATURE_HTTPS_INSPECTION */
4707 clear_iob(csp->client_iob);
4708 }/* -END- else ... if (http->ssl == 1) */
4710 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
4712 /* XXX: should the time start earlier for optimistically sent data? */
4713 csp->server_connection.request_sent = time(NULL);
4715 handle_established_connection(csp);
4716 freez(csp->receive_buffer);
4721 /*********************************************************************
4723 * Function : fuzz_server_response
4725 * Description : Treat the input as a whole server response.
4728 * 1 : csp = Current client state (buffers, headers, etc...)
4729 * 2 : fuzz_input_file = File to read the input from.
4733 *********************************************************************/
4734 extern int fuzz_server_response(struct client_state *csp, char *fuzz_input_file)
4736 static struct forward_spec fwd; /* Zero'd due to being static */
4739 if (strcmp(fuzz_input_file, "-") == 0)
4741 /* XXX: Doesn't work yet. */
4742 csp->server_connection.sfd = 0;
4746 csp->server_connection.sfd = open(fuzz_input_file, O_RDONLY);
4747 if (csp->server_connection.sfd == -1)
4749 log_error(LOG_LEVEL_FATAL, "Failed to open %s: %E",
4754 csp->content_type |= CT_GIF;
4755 csp->action->flags |= ACTION_DEANIMATE;
4756 csp->action->string[ACTION_STRING_DEANIMATE] = "last";
4758 csp->http->path = strdup_or_die("/");
4759 csp->http->host = strdup_or_die("fuzz.example.org");
4760 csp->http->hostport = strdup_or_die("fuzz.example.org:80");
4761 /* Prevent client socket monitoring */
4762 csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
4763 csp->flags |= CSP_FLAG_CHUNKED;
4765 csp->config->feature_flags |= RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE;
4766 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
4768 csp->content_type |= CT_DECLARED|CT_GIF;
4770 csp->config->socket_timeout = 0;
4772 cgi_init_error_messages();
4774 handle_established_connection(csp);
4775 freez(csp->receive_buffer);
4782 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4783 /*********************************************************************
4785 * Function : prepare_csp_for_next_request
4787 * Description : Put the csp in a mostly vergin state.
4790 * 1 : csp = Current client state (buffers, headers, etc...)
4794 *********************************************************************/
4795 static void prepare_csp_for_next_request(struct client_state *csp)
4797 csp->content_type = 0;
4798 csp->content_length = 0;
4799 csp->expected_content_length = 0;
4800 csp->expected_client_content_length = 0;
4801 list_remove_all(csp->headers);
4802 clear_iob(csp->iob);
4803 freez(csp->error_message);
4804 free_http_request(csp->http);
4805 destroy_list(csp->headers);
4806 #ifdef FEATURE_HTTPS_INSPECTION
4807 destroy_list(csp->https_headers);
4809 destroy_list(csp->tags);
4810 #ifdef FEATURE_CLIENT_TAGS
4811 destroy_list(csp->client_tags);
4812 freez(csp->client_address);
4814 free_current_action(csp->action);
4815 if (NULL != csp->fwd)
4817 unload_forward_spec(csp->fwd);
4820 /* XXX: Store per-connection flags someplace else. */
4821 csp->flags = (CSP_FLAG_ACTIVE | CSP_FLAG_REUSED_CLIENT_CONNECTION);
4822 #ifdef FEATURE_TOGGLE
4823 if (global_toggle_state)
4824 #endif /* def FEATURE_TOGGLE */
4826 csp->flags |= CSP_FLAG_TOGGLED_ON;
4829 if (csp->client_iob->eod > csp->client_iob->cur)
4831 long bytes_to_shift = csp->client_iob->cur - csp->client_iob->buf;
4832 size_t data_length = (size_t)(csp->client_iob->eod - csp->client_iob->cur);
4834 assert(bytes_to_shift > 0);
4835 assert(data_length > 0);
4837 log_error(LOG_LEVEL_CONNECT, "Shifting %lu pipelined bytes by %ld bytes",
4838 data_length, bytes_to_shift);
4839 memmove(csp->client_iob->buf, csp->client_iob->cur, data_length);
4840 csp->client_iob->cur = csp->client_iob->buf;
4841 assert(csp->client_iob->eod == csp->client_iob->buf + bytes_to_shift + data_length);
4842 csp->client_iob->eod = csp->client_iob->buf + data_length;
4843 memset(csp->client_iob->eod, '\0', (size_t)bytes_to_shift);
4845 csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
4850 * We mainly care about resetting client_iob->cur so we don't
4851 * waste buffer space at the beginning and don't mess up the
4852 * request restoration done by cgi_show_request().
4854 * Freeing the buffer itself isn't technically necessary,
4855 * but makes debugging more convenient.
4857 clear_iob(csp->client_iob);
4860 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4863 /*********************************************************************
4867 * Description : This is little more than chat. We only "serve" to
4868 * to close (or remember) any socket that chat may have
4872 * 1 : csp = Current client state (buffers, headers, etc...)
4876 *********************************************************************/
4877 static void serve(struct client_state *csp)
4879 int config_file_change_detected = 0; /* Only used for debugging */
4880 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4881 #ifdef FEATURE_CONNECTION_SHARING
4882 static int monitor_thread_running = 0;
4883 #endif /* def FEATURE_CONNECTION_SHARING */
4884 int continue_chatting = 0;
4886 log_error(LOG_LEVEL_CONNECT, "Accepted connection from %s on socket %d",
4887 csp->ip_addr_str, csp->cfd);
4891 unsigned int latency;
4893 #ifdef FEATURE_HTTPS_INSPECTION
4894 if (continue_chatting && client_use_ssl(csp))
4896 continue_https_chat(csp);
4905 * If the request has been crunched,
4906 * the calculated latency is zero.
4908 latency = (unsigned)(csp->server_connection.response_received -
4909 csp->server_connection.request_sent) / 2;
4911 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
4912 && (csp->flags & CSP_FLAG_CRUNCHED)
4913 && (csp->expected_client_content_length != 0))
4915 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
4916 log_error(LOG_LEVEL_CONNECT,
4917 "Tainting client socket %d due to unread data.", csp->cfd);
4920 continue_chatting = (csp->config->feature_flags
4921 & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
4922 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
4923 && (csp->cfd != JB_INVALID_SOCKET)
4924 && (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
4925 && ((csp->flags & CSP_FLAG_SERVER_CONTENT_LENGTH_SET)
4926 || (csp->flags & CSP_FLAG_CHUNKED));
4928 if (!(csp->flags & CSP_FLAG_CRUNCHED)
4929 && (csp->server_connection.sfd != JB_INVALID_SOCKET))
4931 if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
4933 csp->server_connection.keep_alive_timeout = csp->config->default_server_timeout;
4935 if (!(csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
4936 || (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
4937 || !socket_is_still_alive(csp->server_connection.sfd)
4938 || !(latency < csp->server_connection.keep_alive_timeout))
4940 log_error(LOG_LEVEL_CONNECT,
4941 "Closing server socket %d connected to %s. "
4942 "Keep-alive: %u. Tainted: %u. Socket alive: %u. Timeout: %u.",
4943 csp->server_connection.sfd, (csp->server_connection.host != NULL) ?
4944 csp->server_connection.host : csp->http->host,
4945 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
4946 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
4947 socket_is_still_alive(csp->server_connection.sfd),
4948 csp->server_connection.keep_alive_timeout);
4949 #ifdef FEATURE_CONNECTION_SHARING
4950 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
4952 forget_connection(csp->server_connection.sfd);
4954 #endif /* def FEATURE_CONNECTION_SHARING */
4955 #ifdef FEATURE_HTTPS_INSPECTION
4956 close_server_ssl_connection(csp);
4958 close_socket(csp->server_connection.sfd);
4959 mark_connection_closed(&csp->server_connection);
4960 #ifdef FEATURE_HTTPS_INSPECTION
4961 if (continue_chatting && client_use_ssl(csp))
4964 * Close the client socket as well as Privoxy currently
4965 * can't establish a new server connection when the client
4966 * socket is reused and would drop the connection in
4967 * continue_https_chat() anyway.
4969 continue_chatting = 0;
4970 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
4971 log_error(LOG_LEVEL_CONNECT,
4972 "Client socket %d is no longer usable. "
4973 "The server socket has been closed.", csp->cfd);
4979 if (continue_chatting && any_loaded_file_changed(csp))
4981 continue_chatting = 0;
4982 config_file_change_detected = 1;
4984 #ifdef FEATURE_HTTPS_INSPECTION
4985 if (continue_chatting && client_use_ssl(csp) &&
4986 csp->ssl_with_client_is_opened == 0)
4988 continue_chatting = 0;
4989 log_error(LOG_LEVEL_CONNECT, "Client socket %d is no longer usable. "
4990 "The TLS session has been terminated.", csp->cfd);
4994 if (continue_chatting)
4996 if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) != 0)
4997 && socket_is_still_alive(csp->cfd))
4999 log_error(LOG_LEVEL_CONNECT, "Client request %d has been "
5000 "pipelined on socket %d and the socket is still alive.",
5001 csp->requests_received_total+1, csp->cfd);
5002 prepare_csp_for_next_request(csp);
5006 if (0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE))
5008 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
5010 log_error(LOG_LEVEL_CONNECT,
5011 "Waiting for the next client request on socket %d. "
5012 "Keeping the server socket %d to %s open.",
5013 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
5017 log_error(LOG_LEVEL_CONNECT,
5018 "Waiting for the next client request on socket %d. "
5019 "No server socket to keep open.", csp->cfd);
5023 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
5024 && data_is_available(csp->cfd, (int)csp->config->keep_alive_timeout)
5025 && socket_is_still_alive(csp->cfd))
5027 log_error(LOG_LEVEL_CONNECT,
5028 "Data arrived in time on client socket %d. Requests so far: %u",
5029 csp->cfd, csp->requests_received_total);
5030 prepare_csp_for_next_request(csp);
5034 #ifdef FEATURE_CONNECTION_SHARING
5035 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
5036 && (csp->server_connection.sfd != JB_INVALID_SOCKET)
5037 && (socket_is_still_alive(csp->server_connection.sfd))
5038 #ifdef FEATURE_HTTPS_INSPECTION
5039 && !server_use_ssl(csp)
5043 time_t time_open = time(NULL) - csp->server_connection.timestamp;
5045 if (csp->server_connection.keep_alive_timeout < time_open - (time_t)latency)
5050 remember_connection(&csp->server_connection);
5051 csp->server_connection.sfd = JB_INVALID_SOCKET;
5052 drain_and_close_socket(csp->cfd);
5053 csp->cfd = JB_INVALID_SOCKET;
5054 privoxy_mutex_lock(&connection_reuse_mutex);
5055 if (!monitor_thread_running)
5057 monitor_thread_running = 1;
5058 privoxy_mutex_unlock(&connection_reuse_mutex);
5059 wait_for_alive_connections();
5060 privoxy_mutex_lock(&connection_reuse_mutex);
5061 monitor_thread_running = 0;
5063 privoxy_mutex_unlock(&connection_reuse_mutex);
5065 #endif /* def FEATURE_CONNECTION_SHARING */
5069 else if (csp->server_connection.sfd != JB_INVALID_SOCKET)
5071 log_error(LOG_LEVEL_CONNECT,
5072 "Closing server socket %d connected to %s. Keep-alive: %u. "
5073 "Tainted: %u. Socket alive: %u. Timeout: %u. "
5074 "Configuration file change detected: %u",
5075 csp->server_connection.sfd, csp->server_connection.host,
5076 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
5077 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
5078 socket_is_still_alive(csp->server_connection.sfd),
5079 csp->server_connection.keep_alive_timeout,
5080 config_file_change_detected);
5082 } while (continue_chatting);
5086 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
5088 if (csp->cfd != JB_INVALID_SOCKET)
5090 log_error(LOG_LEVEL_CONNECT, "Closing client socket %d. "
5091 "Keep-alive: %u. Socket alive: %u. Data available: %u. "
5092 "Configuration file change detected: %u. Requests received: %u.",
5093 csp->cfd, 0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE),
5094 socket_is_still_alive(csp->cfd), data_is_available(csp->cfd, 0),
5095 config_file_change_detected, csp->requests_received_total);
5096 #ifdef FEATURE_HTTPS_INSPECTION
5097 close_client_ssl_connection(csp);
5099 drain_and_close_socket(csp->cfd);
5102 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
5104 #ifdef FEATURE_CONNECTION_SHARING
5105 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
5107 forget_connection(csp->server_connection.sfd);
5109 #endif /* def FEATURE_CONNECTION_SHARING */
5111 #ifdef FEATURE_HTTPS_INSPECTION
5112 close_server_ssl_connection(csp);
5113 #endif /* def FEATURE_HTTPS_INSPECTION */
5115 close_socket(csp->server_connection.sfd);
5118 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
5119 mark_connection_closed(&csp->server_connection);
5122 free_csp_resources(csp);
5124 csp->flags &= ~CSP_FLAG_ACTIVE;
5130 /*********************************************************************
5132 * Function : server_thread
5134 * Description : We only exist to call `serve' in a threaded environment.
5137 * 1 : data = Current client state (buffers, headers, etc...)
5139 * Returns : Always 0.
5141 *********************************************************************/
5142 static int32 server_thread(void *data)
5144 serve((struct client_state *) data);
5151 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
5152 /*********************************************************************
5156 * Description : Print usage info & exit.
5158 * Parameters : Pointer to argv[0] for identifying ourselves
5162 *********************************************************************/
5163 static void usage(const char *name)
5165 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
5166 "Usage: %s [--config-test] "
5169 #endif /* defined(unix) */
5172 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
5173 #endif /* defined(unix) */
5174 "[--version] [configfile]\n",
5178 show_fuzz_usage(name);
5181 printf("Aborting\n");
5186 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
5189 #ifdef MUTEX_LOCKS_AVAILABLE
5190 /*********************************************************************
5192 * Function : privoxy_mutex_lock
5194 * Description : Locks a mutex.
5197 * 1 : mutex = The mutex to lock.
5199 * Returns : Void. May exit in case of errors.
5201 *********************************************************************/
5202 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
5204 #ifdef FEATURE_PTHREAD
5205 int err = pthread_mutex_lock(mutex);
5208 if (mutex != &log_mutex)
5210 log_error(LOG_LEVEL_FATAL,
5211 "Mutex locking failed: %s.\n", strerror(err));
5216 EnterCriticalSection(mutex);
5217 #endif /* def FEATURE_PTHREAD */
5221 /*********************************************************************
5223 * Function : privoxy_mutex_unlock
5225 * Description : Unlocks a mutex.
5228 * 1 : mutex = The mutex to unlock.
5230 * Returns : Void. May exit in case of errors.
5232 *********************************************************************/
5233 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
5235 #ifdef FEATURE_PTHREAD
5236 int err = pthread_mutex_unlock(mutex);
5239 if (mutex != &log_mutex)
5241 log_error(LOG_LEVEL_FATAL,
5242 "Mutex unlocking failed: %s.\n", strerror(err));
5247 LeaveCriticalSection(mutex);
5248 #endif /* def FEATURE_PTHREAD */
5252 /*********************************************************************
5254 * Function : privoxy_mutex_init
5256 * Description : Prepares a mutex.
5259 * 1 : mutex = The mutex to initialize.
5261 * Returns : Void. May exit in case of errors.
5263 *********************************************************************/
5264 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
5266 #ifdef FEATURE_PTHREAD
5267 int err = pthread_mutex_init(mutex, 0);
5270 printf("Fatal error. Mutex initialization failed: %s.\n",
5275 InitializeCriticalSection(mutex);
5276 #endif /* def FEATURE_PTHREAD */
5278 #endif /* def MUTEX_LOCKS_AVAILABLE */
5280 /*********************************************************************
5282 * Function : initialize_mutexes
5284 * Description : Prepares mutexes if mutex support is available.
5288 * Returns : Void, exits in case of errors.
5290 *********************************************************************/
5291 static void initialize_mutexes(void)
5293 #ifdef MUTEX_LOCKS_AVAILABLE
5295 * Prepare global mutex semaphores
5298 #ifdef FEATURE_HTTPS_INSPECTION
5299 privoxy_mutex_init(&certificate_mutex);
5300 privoxy_mutex_init(&ssl_init_mutex);
5303 privoxy_mutex_init(&log_mutex);
5304 privoxy_mutex_init(&log_init_mutex);
5305 privoxy_mutex_init(&connection_reuse_mutex);
5306 #ifdef FEATURE_EXTERNAL_FILTERS
5307 privoxy_mutex_init(&external_filter_mutex);
5309 #ifdef FEATURE_CLIENT_TAGS
5310 privoxy_mutex_init(&client_tags_mutex);
5312 #ifdef FEATURE_STATISTICS
5313 privoxy_mutex_init(&block_statistics_mutex);
5315 #ifdef FEATURE_EXTENDED_STATISTICS
5316 privoxy_mutex_init(&filter_statistics_mutex);
5317 privoxy_mutex_init(&block_reason_statistics_mutex);
5321 * XXX: The assumptions below are a bit naive
5322 * and can cause locks that aren't necessary.
5324 * For example older FreeBSD versions (< 6.x?)
5325 * have no gethostbyname_r, but gethostbyname is
5328 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
5329 privoxy_mutex_init(&resolver_mutex);
5330 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
5332 * XXX: should we use a single mutex for
5333 * localtime() and gmtime() as well?
5335 #ifndef HAVE_GMTIME_R
5336 privoxy_mutex_init(&gmtime_mutex);
5337 #endif /* ndef HAVE_GMTIME_R */
5339 #ifndef HAVE_LOCALTIME_R
5340 privoxy_mutex_init(&localtime_mutex);
5341 #endif /* ndef HAVE_GMTIME_R */
5343 #if !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM)
5344 privoxy_mutex_init(&rand_mutex);
5345 #endif /* !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM) */
5347 #endif /* def MUTEX_LOCKS_AVAILABLE */
5350 /*********************************************************************
5354 * Description : Load the config file and start the listen loop.
5355 * This function is a lot more *sane* with the `load_config'
5356 * and `listen_loop' functions; although it stills does
5357 * a *little* too much for my taste.
5360 * 1 : argc = Number of parameters (including $0).
5361 * 2 : argv = Array of (char *)'s to the parameters.
5363 * Returns : 1 if : can't open config file, unrecognized directive,
5364 * stats requested in multi-thread mode, can't open the
5365 * log file, can't open the jar file, listen port is invalid,
5366 * any load fails, and can't bind port.
5368 * Else main never returns, the process must be signaled
5369 * to terminate execution. Or, on Windows, use the
5370 * "File", "Exit" menu option.
5372 *********************************************************************/
5374 int real_main(int argc, char **argv)
5376 int main(int argc, char **argv)
5380 int do_config_test = 0;
5381 #ifndef HAVE_ARC4RANDOM
5382 unsigned int random_seed;
5385 struct passwd *pw = NULL;
5386 struct group *grp = NULL;
5388 char *pre_chroot_nslookup_to_load_resolver = NULL;
5391 char *fuzz_input_type = NULL;
5392 char *fuzz_input_file = NULL;
5399 #if !defined(_WIN32)
5406 /* Prepare mutexes if supported and necessary. */
5407 initialize_mutexes();
5409 /* Enable logging until further notice. */
5413 * Parse the command line arguments
5415 * XXX: simply printing usage information in case of
5416 * invalid arguments isn't particularly user friendly.
5418 while (++argc_pos < argc)
5421 /* Check to see if the service must be installed or uninstalled */
5422 if (strncmp(argv[argc_pos], "--install", 9) == 0)
5424 const char *pName = argv[argc_pos] + 9;
5427 exit((install_service(pName)) ? 0 : 1);
5429 else if (strncmp(argv[argc_pos], "--uninstall", 11) == 0)
5431 const char *pName = argv[argc_pos] + 11;
5434 exit((uninstall_service(pName)) ? 0 : 1);
5436 else if (strcmp(argv[argc_pos], "--service") == 0)
5438 bRunAsService = TRUE;
5439 w32_set_service_cwd();
5440 atexit(w32_service_exit_notify);
5443 #endif /* defined(_WIN32) */
5446 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
5448 if (strcmp(argv[argc_pos], "--help") == 0)
5453 else if (strcmp(argv[argc_pos], "--version") == 0)
5455 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
5461 else if (strcmp(argv[argc_pos], "--no-daemon") == 0)
5463 set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
5467 else if (strcmp(argv[argc_pos], "--pidfile") == 0)
5469 if (++argc_pos == argc) usage(argv[0]);
5470 pidfile = strdup_or_die(argv[argc_pos]);
5473 else if (strcmp(argv[argc_pos], "--user") == 0)
5478 if (++argc_pos == argc) usage(argv[argc_pos]);
5480 user_arg = strdup_or_die(argv[argc_pos]);
5481 group_name = strchr(user_arg, '.');
5482 if (NULL != group_name)
5484 /* Nul-terminate the user name */
5487 /* Skip the former delimiter to actually reach the group name */
5490 grp = getgrnam(group_name);
5493 log_error(LOG_LEVEL_FATAL, "Group '%s' not found.", group_name);
5496 pw = getpwnam(user_arg);
5499 log_error(LOG_LEVEL_FATAL, "User '%s' not found.", user_arg);
5505 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup") == 0)
5507 if (++argc_pos == argc) usage(argv[0]);
5508 pre_chroot_nslookup_to_load_resolver = strdup_or_die(argv[argc_pos]);
5511 else if (strcmp(argv[argc_pos], "--chroot") == 0)
5515 #endif /* defined(unix) */
5517 else if (strcmp(argv[argc_pos], "--config-test") == 0)
5522 else if (strcmp(argv[argc_pos], "--fuzz") == 0)
5525 if (argc < argc_pos + 2) usage(argv[0]);
5526 fuzz_input_type = argv[argc_pos];
5528 fuzz_input_file = argv[argc_pos];
5530 else if (strcmp(argv[argc_pos], "--stfu") == 0)
5532 set_debug_level(LOG_LEVEL_STFU);
5535 else if (argc_pos + 1 != argc)
5538 * This is neither the last command line
5539 * option, nor was it recognized before,
5540 * therefore it must be invalid.
5546 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
5548 configfile = argv[argc_pos];
5551 } /* -END- while (more arguments) */
5553 show_version(Argv[0]);
5556 if (*configfile != '/')
5558 char cwd[BUFFER_SIZE];
5560 size_t abs_file_size;
5562 /* make config-filename absolute here */
5563 if (NULL == getcwd(cwd, sizeof(cwd)))
5565 perror("failed to get current working directory");
5569 basedir = strdup_or_die(cwd);
5571 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
5572 abs_file = malloc_or_die(abs_file_size);
5573 strlcpy(abs_file, basedir, abs_file_size);
5574 strlcat(abs_file, "/", abs_file_size);
5575 strlcat(abs_file, configfile, abs_file_size);
5576 configfile = abs_file;
5578 #endif /* defined unix */
5582 clients->next = NULL;
5584 /* XXX: factor out initialising after the next stable release. */
5589 #ifndef HAVE_ARC4RANDOM
5590 random_seed = (unsigned int)time(NULL);
5592 srandom(random_seed);
5595 #endif /* ifdef HAVE_RANDOM */
5596 #endif /* ifndef HAVE_ARC4RANDOM */
5599 * Unix signal handling
5601 * Catch the abort, interrupt and terminate signals for a graceful exit
5602 * Catch the hangup signal so the errlog can be reopened.
5604 * Ignore the broken pipe signal as connection failures
5605 * are handled when and where they occur without relying
5608 #if !defined(_WIN32)
5611 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP };
5613 for (idx = 0; idx < SZ(catched_signals); idx++)
5615 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
5616 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
5618 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
5619 #endif /* ifdef sun */
5621 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
5625 if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
5627 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for SIGPIPE: %E");
5631 #else /* ifdef _WIN32 */
5632 # ifdef _WIN_CONSOLE
5634 * We *are* in a windows console app.
5635 * Print a verbose messages about FAQ's and such
5637 printf("%s", win32_blurb);
5638 # endif /* def _WIN_CONSOLE */
5639 #endif /* def _WIN32 */
5642 if (fuzz_input_type != NULL)
5644 exit(process_fuzzed_input(fuzz_input_type, fuzz_input_file));
5646 log_error(LOG_LEVEL_FATAL,
5647 "When compiled with fuzzing support, Privoxy should only be used for fuzzing. "
5648 "Various data structures are static which is unsafe when using threads.");
5653 exit(NULL == load_config());
5656 /* Initialize the CGI subsystem */
5657 cgi_init_error_messages();
5660 * If running on unix and without the --no-daemon
5661 * option, become a daemon. I.e. fork, detach
5662 * from tty and get process group leadership
5671 if (pid < 0) /* error */
5676 else if (pid != 0) /* parent */
5681 * must check for errors
5682 * child died due to missing files aso
5685 wpid = waitpid(pid, &status, WNOHANG);
5697 * stderr (fd 2) will be closed later on,
5698 * when the config file has been parsed.
5704 * Reserve fd 0 and 1 to prevent abort() and friends
5705 * from sending stuff to the clients or servers.
5707 fd = open("/dev/null", O_RDONLY);
5710 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
5714 if (dup2(fd, 0) == -1)
5716 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 0: %E");
5720 fd = open("/dev/null", O_WRONLY);
5723 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
5727 if (dup2(fd, 1) == -1)
5729 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 1: %E");
5734 #ifdef FEATURE_EXTERNAL_FILTERS
5735 for (fd = 0; fd < 3; fd++)
5737 mark_socket_for_close_on_execute(fd);
5741 if (chdir("/") != 0)
5743 log_error(LOG_LEVEL_FATAL, "Failed to cd into '/': %E");
5746 } /* -END- if (daemon_mode) */
5749 * As soon as we have written the PID file, we can switch
5750 * to the user and group ID indicated by the --user option
5752 if (pidfile != NULL)
5754 write_pid_file(pidfile);
5758 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
5760 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
5764 if (setgroups(1, &grp->gr_gid))
5766 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
5769 else if (initgroups(pw->pw_name, pw->pw_gid))
5771 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
5777 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
5779 /* Read the time zone file from /etc before doing chroot. */
5781 if (NULL != pre_chroot_nslookup_to_load_resolver
5782 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
5784 /* Initialize resolver library. */
5785 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
5787 if (chroot(pw->pw_dir) < 0)
5789 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
5793 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
5796 if (setuid(pw->pw_uid))
5798 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
5802 char putenv_dummy[64];
5804 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
5805 if (putenv(putenv_dummy) != 0)
5807 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
5810 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
5811 if (putenv(putenv_dummy) != 0)
5813 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
5819 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
5822 #endif /* defined unix */
5825 /* This will be FALSE unless the command line specified --service
5829 /* Yup, so now we must attempt to establish a connection
5830 * with the service dispatcher. This will only work if this
5831 * process was launched by the service control manager to
5832 * actually run as a service. If this isn't the case, i've
5833 * known it take around 30 seconds or so for the call to return.
5836 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
5837 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
5839 /* Service has run, and at this point is now being stopped, so just return */
5844 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
5846 /* An error occurred. Usually it's because --service was wrongly specified
5847 * and we were unable to connect to the Service Control Dispatcher because
5848 * it wasn't expecting us and is therefore not listening.
5850 * For now, just continue below to call the listen_loop function.
5853 #endif /* def _WIN32 */
5863 /*********************************************************************
5865 * Function : bind_port_helper
5867 * Description : Bind the listen port. Handles logging, and aborts
5871 * 1 : haddr = Host address to bind to. Use NULL to bind to
5873 * 2 : hport = Specifies port to bind to.
5874 * 3 : backlog = Listen backlog.
5876 * Returns : Port that was opened.
5878 *********************************************************************/
5879 static jb_socket bind_port_helper(const char *haddr, int hport, int backlog)
5884 result = bind_port(haddr, hport, backlog, &bfd);
5888 const char *bind_address = (NULL != haddr) ? haddr : "INADDR_ANY";
5892 log_error(LOG_LEVEL_FATAL,
5893 "can't bind to %s:%d: There may be another Privoxy "
5894 "or some other proxy running on port %d",
5895 bind_address, hport, hport);
5899 log_error(LOG_LEVEL_FATAL,
5900 "can't bind to %s:%d: The hostname is not resolvable",
5901 bind_address, hport);
5905 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: %E",
5906 bind_address, hport);
5910 /* shouldn't get here */
5911 return JB_INVALID_SOCKET;
5916 if (bfd >= FD_SETSIZE)
5918 log_error(LOG_LEVEL_FATAL,
5919 "Bind socket number too high to use select(): %d >= %d",
5927 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
5932 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
5940 /*********************************************************************
5942 * Function : bind_ports_helper
5944 * Description : Bind the listen ports. Handles logging, and aborts
5948 * 1 : config = Privoxy configuration. Specifies ports
5950 * 2 : sockets = Preallocated array of opened sockets
5951 * corresponding to specification in config.
5952 * All non-opened sockets will be set to
5953 * JB_INVALID_SOCKET.
5955 * Returns : Nothing. Inspect sockets argument.
5957 *********************************************************************/
5958 static void bind_ports_helper(struct configuration_spec * config,
5959 jb_socket sockets[])
5963 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
5965 if (config->hport[i])
5967 sockets[i] = bind_port_helper(config->haddr[i],
5968 config->hport[i], config->listen_backlog);
5969 #if defined(FEATURE_ACCEPT_FILTER) && defined(SO_ACCEPTFILTER)
5970 if (config->enable_accept_filter && sockets[i] != JB_INVALID_SOCKET)
5972 struct accept_filter_arg af_options;
5973 bzero(&af_options, sizeof(af_options));
5974 strlcpy(af_options.af_name, "httpready", sizeof(af_options.af_name));
5975 if (setsockopt(sockets[i], SOL_SOCKET, SO_ACCEPTFILTER, &af_options,
5976 sizeof(af_options)))
5978 log_error(LOG_LEVEL_ERROR,
5979 "Enabling accept filter for socket %d failed: %E", sockets[i]);
5986 sockets[i] = JB_INVALID_SOCKET;
5989 config->need_bind = 0;
5993 /*********************************************************************
5995 * Function : close_ports_helper
5997 * Description : Close listenings ports.
6000 * 1 : sockets = Array of opened and non-opened sockets to
6001 * close. All sockets will be set to
6002 * JB_INVALID_SOCKET.
6004 * Returns : Nothing.
6006 *********************************************************************/
6007 static void close_ports_helper(jb_socket sockets[])
6011 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
6013 if (JB_INVALID_SOCKET != sockets[i])
6015 close_socket(sockets[i]);
6017 sockets[i] = JB_INVALID_SOCKET;
6023 /* Without this simple workaround we get this compiler warning from _beginthread
6024 * warning C4028: formal parameter 1 different from declaration
6026 void w32_service_listen_loop(void *p)
6030 #endif /* def _WIN32 */
6033 /*********************************************************************
6035 * Function : listen_loop
6037 * Description : bind the listen port and enter a "FOREVER" listening loop.
6043 *********************************************************************/
6044 static void listen_loop(void)
6046 struct client_states *csp_list = NULL;
6047 struct client_state *csp = NULL;
6048 jb_socket bfds[MAX_LISTENING_SOCKETS];
6049 struct configuration_spec *config;
6050 unsigned int active_threads = 0;
6051 #if defined(FEATURE_PTHREAD)
6052 pthread_attr_t attrs;
6054 pthread_attr_init(&attrs);
6055 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
6058 config = load_config();
6060 #ifdef FEATURE_CONNECTION_SHARING
6062 * XXX: Should be relocated once it no
6063 * longer needs to emit log messages.
6065 initialize_reusable_connections();
6066 #endif /* def FEATURE_CONNECTION_SHARING */
6068 bind_ports_helper(config, bfds);
6070 #ifdef FEATURE_GRACEFUL_TERMINATION
6071 while (!g_terminate)
6076 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__)
6077 while (waitpid(-1, NULL, WNOHANG) > 0)
6079 /* zombie children */
6081 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) */
6084 * Free data that was used by died threads
6086 active_threads = sweep();
6090 * Re-open the errlog after HUP signal
6092 if (received_hup_signal)
6094 if (NULL != config->logfile)
6096 init_error_log(Argv[0], config->logfile);
6098 received_hup_signal = 0;
6102 csp_list = zalloc_or_die(sizeof(*csp_list));
6103 csp = &csp_list->csp;
6105 log_error(LOG_LEVEL_CONNECT,
6106 "Waiting for the next client connection. Currently active threads: %u",
6110 * This config may be outdated, but for accept_connection()
6111 * it's fresh enough.
6113 csp->config = config;
6115 if (!accept_connection(csp, bfds))
6117 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
6122 csp->flags |= CSP_FLAG_ACTIVE;
6123 csp->server_connection.sfd = JB_INVALID_SOCKET;
6125 csp->config = config = load_config();
6127 if (config->need_bind)
6130 * Since we were listening to the "old port", we will not see
6131 * a "listen" param change until the next request. So, at
6132 * least 1 more request must be made for us to find the new
6133 * setting. I am simply closing the old socket and binding the
6136 * Which-ever is correct, we will serve 1 more page via the
6137 * old settings. This should probably be a "show-status"
6138 * request. This should not be a so common of an operation
6139 * that this will hurt people's feelings.
6142 close_ports_helper(bfds);
6144 bind_ports_helper(config, bfds);
6147 #ifdef FEATURE_TOGGLE
6148 if (global_toggle_state)
6149 #endif /* def FEATURE_TOGGLE */
6151 csp->flags |= CSP_FLAG_TOGGLED_ON;
6154 if (run_loader(csp))
6156 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
6157 /* Never get here - LOG_LEVEL_FATAL causes program exit */
6161 if (block_acl(NULL,csp))
6163 log_error(LOG_LEVEL_CONNECT,
6164 "Connection from %s on %s (socket %d) dropped due to ACL",
6165 csp->ip_addr_str, csp->listen_addr_str, csp->cfd);
6166 close_socket(csp->cfd);
6167 freez(csp->ip_addr_str);
6168 freez(csp->listen_addr_str);
6172 #endif /* def FEATURE_ACL */
6174 if ((0 != config->max_client_connections)
6175 && (active_threads >= config->max_client_connections))
6177 log_error(LOG_LEVEL_ERROR,
6178 "Rejecting connection from %s. Maximum number of connections reached.",
6180 write_socket_delayed(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
6181 strlen(TOO_MANY_CONNECTIONS_RESPONSE), get_write_delay(csp));
6182 close_socket(csp->cfd);
6183 freez(csp->ip_addr_str);
6184 freez(csp->listen_addr_str);
6189 /* add it to the list of clients */
6190 csp_list->next = clients->next;
6191 clients->next = csp_list;
6193 if (config->multi_threaded)
6197 /* this is a switch () statement in the C preprocessor - ugh */
6198 #undef SELECTED_ONE_OPTION
6200 /* Use Pthreads in preference to native code */
6201 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
6202 #define SELECTED_ONE_OPTION
6204 pthread_t the_thread;
6207 ret = pthread_create(&the_thread, &attrs,
6208 (void * (*)(void *))serve, csp);
6209 child_id = ret ? -1 : 0;
6213 #if defined(_WIN32) && !defined(SELECTED_ONE_OPTION)
6214 #define SELECTED_ONE_OPTION
6215 child_id = _beginthread(
6216 (void (*)(void *))serve,
6221 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
6222 #define SELECTED_ONE_OPTION
6224 thread_id tid = spawn_thread
6225 (server_thread, "server", B_NORMAL_PRIORITY, csp);
6227 if ((tid >= 0) && (resume_thread(tid) == B_OK))
6229 child_id = (int) tid;
6238 #if !defined(SELECTED_ONE_OPTION)
6241 /* This block is only needed when using fork().
6242 * When using threads, the server thread was
6243 * created and run by the call to _beginthread().
6245 if (child_id == 0) /* child */
6248 #ifdef FEATURE_TOGGLE
6249 int inherited_toggle_state = global_toggle_state;
6250 #endif /* def FEATURE_TOGGLE */
6255 * If we've been toggled or we've blocked the request, tell Mom
6258 #ifdef FEATURE_TOGGLE
6259 if (inherited_toggle_state != global_toggle_state)
6261 rc |= RC_FLAG_TOGGLED;
6263 #endif /* def FEATURE_TOGGLE */
6265 #ifdef FEATURE_STATISTICS
6266 if (csp->flags & CSP_FLAG_REJECTED)
6268 rc |= RC_FLAG_BLOCKED;
6270 #endif /* ndef FEATURE_STATISTICS */
6274 else if (child_id > 0) /* parent */
6276 /* in a fork()'d environment, the parent's
6277 * copy of the client socket and the CSP
6281 #if !defined(_WIN32) && !defined(__CYGWIN__)
6283 wait(&child_status);
6286 * Evaluate child's return code: If the child has
6287 * - been toggled, toggle ourselves
6288 * - blocked its request, bump up the stats counter
6291 #ifdef FEATURE_TOGGLE
6292 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
6294 global_toggle_state = !global_toggle_state;
6296 #endif /* def FEATURE_TOGGLE */
6298 #ifdef FEATURE_STATISTICS
6300 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
6304 #endif /* def FEATURE_STATISTICS */
6306 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
6307 close_socket(csp->cfd);
6308 csp->flags &= ~CSP_FLAG_ACTIVE;
6312 #undef SELECTED_ONE_OPTION
6313 /* end of cpp switch () */
6318 * Spawning the child failed, assume it's because
6319 * there are too many children running already.
6320 * XXX: If you assume ...
6322 log_error(LOG_LEVEL_ERROR,
6323 "Unable to take any additional connections: %E. Active threads: %u",
6325 write_socket_delayed(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
6326 strlen(TOO_MANY_CONNECTIONS_RESPONSE), get_write_delay(csp));
6327 close_socket(csp->cfd);
6328 csp->flags &= ~CSP_FLAG_ACTIVE;
6337 #if defined(FEATURE_PTHREAD)
6338 pthread_attr_destroy(&attrs);
6341 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
6343 #ifdef FEATURE_GRACEFUL_TERMINATION
6345 log_error(LOG_LEVEL_INFO, "Graceful termination requested.");
6347 close_ports_helper(bfds);
6349 unload_current_config_file();
6350 unload_current_actions_file();
6351 unload_current_re_filterfile();
6352 #ifdef FEATURE_TRUST
6353 unload_current_trust_file();
6356 if (config->multi_threaded)
6363 } while ((clients->next != NULL) && (--i > 0));
6367 log_error(LOG_LEVEL_ERROR, "Graceful termination failed "
6368 "- still some live clients after 1 minute wait.");
6378 #ifdef FEATURE_HTTPS_INSPECTION
6380 * Only release TLS backed resources if there
6381 * are no active connections left.
6383 if (clients->next == NULL)
6389 log_error(LOG_LEVEL_INFO, "Exiting gracefully.");
6391 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
6392 /* Cleanup - remove taskbar icon etc. */
6397 #endif /* FEATURE_GRACEFUL_TERMINATION */