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) 2001-2021 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 "Waiting for up to %lu bytes of request body from the client.",
2327 len = ssl_recv_data(&(csp->ssl_client_attr), buf,
2328 (unsigned)max_bytes_to_read);
2331 log_error(LOG_LEVEL_CONNECT, "Failed receiving request body from %s", csp->ip_addr_str);
2334 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, (char *)buf, len))
2338 assert(to_read >= len);
2343 log_error(LOG_LEVEL_CONNECT,
2344 "Not enough request body has been read: expected %lu more bytes",
2349 log_error(LOG_LEVEL_CONNECT,
2350 "The last %llu bytes of the request body have been read",
2351 csp->expected_client_content_length);
2356 /*********************************************************************
2358 * Function : receive_and_send_encrypted_post_data
2360 * Description : Reads remaining request body from the client and sends
2364 * 1 : csp = Current client state (buffers, headers, etc...)
2366 * Returns : 0 on success, anything else is an error.
2368 *********************************************************************/
2369 static int receive_and_send_encrypted_post_data(struct client_state *csp)
2371 int content_length_known = csp->expected_client_content_length != 0;
2373 while (is_ssl_pending(&(csp->ssl_client_attr))
2374 || (content_length_known && csp->expected_client_content_length != 0))
2376 unsigned char buf[BUFFER_SIZE];
2378 int max_bytes_to_read = sizeof(buf);
2380 if (content_length_known && csp->expected_client_content_length < sizeof(buf))
2382 max_bytes_to_read = (int)csp->expected_client_content_length;
2384 log_error(LOG_LEVEL_CONNECT,
2385 "Waiting for up to %d bytes of request body from the client.",
2387 len = ssl_recv_data(&(csp->ssl_client_attr), buf,
2388 (unsigned)max_bytes_to_read);
2395 /* XXX: Does this actually happen? */
2398 log_error(LOG_LEVEL_CONNECT, "Forwarding %d bytes of encrypted request body",
2400 len = ssl_send_data(&(csp->ssl_server_attr), buf, (size_t)len);
2405 if (csp->expected_client_content_length != 0)
2407 if (csp->expected_client_content_length >= len)
2409 csp->expected_client_content_length -= (unsigned)len;
2411 if (csp->expected_client_content_length == 0)
2413 log_error(LOG_LEVEL_CONNECT, "Forwarded the last %d bytes", len);
2419 log_error(LOG_LEVEL_CONNECT, "Done forwarding encrypted request body");
2426 /*********************************************************************
2428 * Function : send_https_request
2430 * Description : Sends the HTTP headers from the client request
2431 * and all the body data that has already been received.
2434 * 1 : csp = Current client state (buffers, headers, etc...)
2436 * Returns : 0 on success, anything else is an error.
2438 *********************************************************************/
2439 static int send_https_request(struct client_state *csp)
2444 const char *to_send;
2446 int filter_client_body = csp->expected_client_content_length != 0 &&
2447 client_body_filters_enabled(csp->action) && can_filter_request_body(csp);
2449 if (filter_client_body)
2451 if (read_https_request_body(csp))
2455 to_send_len = csp->expected_client_content_length;
2456 to_send = execute_client_body_filters(csp, &to_send_len);
2457 if (to_send == NULL)
2459 /* just flush client_iob */
2460 filter_client_body = FALSE;
2462 else if (to_send_len != csp->expected_client_content_length &&
2463 update_client_headers(csp, to_send_len))
2465 log_error(LOG_LEVEL_HEADER, "Error updating client headers");
2468 csp->expected_client_content_length = 0;
2471 hdr = list_to_text(csp->https_headers);
2474 /* FIXME Should handle error properly */
2475 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2477 list_remove_all(csp->https_headers);
2480 * Write the client's (modified) header to the server
2481 * (along with anything else that may be in the buffer)
2483 ret = ssl_send_data(&(csp->ssl_server_attr),
2484 (const unsigned char *)hdr, strlen(hdr));
2489 log_error(LOG_LEVEL_CONNECT,
2490 "Failed sending encrypted request headers to: %s: %E",
2491 csp->http->hostport);
2492 mark_server_socket_tainted(csp);
2496 if (filter_client_body)
2498 ret = ssl_send_data(&(csp->ssl_server_attr), (const unsigned char *)to_send, to_send_len);
2502 log_error(LOG_LEVEL_CONNECT, "Failed sending filtered request body to: %s",
2503 csp->http->hostport);
2508 if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) == 0)
2509 && ((flushed = ssl_flush_socket(&(csp->ssl_server_attr),
2510 csp->client_iob)) < 0))
2512 log_error(LOG_LEVEL_CONNECT, "Failed sending request body to: %s: %E",
2513 csp->http->hostport);
2516 if (flushed != 0 || csp->expected_client_content_length != 0)
2518 if (csp->expected_client_content_length != 0)
2520 if (csp->expected_client_content_length < flushed)
2522 log_error(LOG_LEVEL_ERROR,
2523 "Flushed %ld bytes of request body while only expecting %llu",
2524 flushed, csp->expected_client_content_length);
2525 csp->expected_client_content_length = 0;
2529 log_error(LOG_LEVEL_CONNECT,
2530 "Flushed %ld bytes of request body while expecting %llu",
2531 flushed, csp->expected_client_content_length);
2532 csp->expected_client_content_length -= (unsigned)flushed;
2533 if (receive_and_send_encrypted_post_data(csp))
2541 log_error(LOG_LEVEL_CONNECT,
2542 "Flushed %ld bytes of request body", flushed);
2546 log_error(LOG_LEVEL_CONNECT, "Encrypted request sent");
2553 /*********************************************************************
2555 * Function : receive_encrypted_request_headers
2557 * Description : Receives the encrypted request headers when
2561 * 1 : csp = Current client state (buffers, headers, etc...)
2563 * Returns : JB_ERR_OK on success,
2564 * JB_ERR_PARSE or JB_ERR_MEMORY otherwise
2566 *********************************************************************/
2567 static jb_err receive_encrypted_request_headers(struct client_state *csp)
2569 char buf[BUFFER_SIZE];
2575 log_error(LOG_LEVEL_HEADER, "Waiting for encrypted client headers");
2576 if (!is_ssl_pending(&(csp->ssl_client_attr)) &&
2577 !data_is_available(csp->cfd, csp->config->socket_timeout))
2579 log_error(LOG_LEVEL_CONNECT,
2580 "Socket %d timed out while waiting for client headers", csp->cfd);
2581 return JB_ERR_PARSE;
2583 len = ssl_recv_data(&(csp->ssl_client_attr),
2584 (unsigned char *)buf, sizeof(buf));
2587 log_error(LOG_LEVEL_CONNECT,
2588 "Socket %d closed while waiting for client headers", csp->cfd);
2589 return JB_ERR_PARSE;
2593 return JB_ERR_PARSE;
2595 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
2597 return JB_ERR_MEMORY;
2599 p = strstr(csp->client_iob->cur, "\r\n\r\n");
2600 } while (p == NULL);
2602 log_error(LOG_LEVEL_HEADER, "Encrypted headers received completely");
2608 /*********************************************************************
2610 * Function : change_encrypted_request_destination
2612 * Description : Parse a (rewritten) request line from an encrypted
2613 * request and regenerate the http request data.
2616 * 1 : csp = Current client state (buffers, headers, etc...)
2618 * Returns : Forwards the parse_http_request() return code.
2619 * Terminates in case of memory problems.
2621 *********************************************************************/
2622 static jb_err change_encrypted_request_destination(struct client_state *csp)
2625 char *original_host = csp->http->host;
2626 int original_port = csp->http->port;
2628 log_error(LOG_LEVEL_REDIRECTS, "Rewrite detected: %s",
2629 csp->https_headers->first->str);
2630 csp->http->host = NULL;
2631 free_http_request(csp->http);
2632 err = parse_http_request(csp->https_headers->first->str, csp->http);
2633 if (JB_ERR_OK != err)
2635 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2636 jb_err_to_string(err));
2637 freez(original_host);
2641 if (csp->http->host == NULL)
2643 char port_string[10];
2645 * The rewritten request line did not specify a host
2646 * which means we can use the original host specified
2649 csp->http->host = original_host;
2650 csp->http->port = original_port;
2651 log_error(LOG_LEVEL_REDIRECTS, "Keeping the original host: %s",
2654 * If the rewritten request line didn't contain a host
2655 * it also didn't contain a port so we can reuse the host
2658 freez(csp->http->hostport);
2659 csp->http->hostport = strdup_or_die(csp->http->host);
2660 snprintf(port_string, sizeof(port_string), ":%d", original_port);
2661 err = string_append(&csp->http->hostport, port_string);
2662 if (err != JB_ERR_OK)
2664 log_error(LOG_LEVEL_ERROR, "Failed to rebuild hostport: %s.",
2665 jb_err_to_string(err));
2670 * While the request line didn't mention it,
2671 * we're https-inspecting and want to speak TLS
2674 csp->http->server_ssl = 1;
2679 /* The rewrite filter added a host so we can ditch the original */
2680 freez(original_host);
2681 csp->http->server_ssl = csp->http->ssl;
2684 csp->http->client_ssl = 1;
2686 freez(csp->https_headers->first->str);
2687 build_request_line(csp, NULL, &csp->https_headers->first->str);
2689 if (!server_use_ssl(csp))
2691 log_error(LOG_LEVEL_REDIRECTS,
2692 "Rewritten request line results in downgrade to http");
2694 * Replace the unencryptd headers received with the
2695 * CONNECT request with the ones we received securely.
2697 destroy_list(csp->headers);
2698 csp->headers->first = csp->https_headers->first;
2699 csp->headers->last = csp->https_headers->last;
2700 csp->https_headers->first = NULL;
2701 csp->https_headers->last = NULL;
2709 /*********************************************************************
2711 * Function : process_encrypted_request_headers
2713 * Description : Receives and parses the encrypted headers send
2714 * by the client when https-inspecting.
2717 * 1 : csp = Current client state (buffers, headers, etc...)
2719 * Returns : JB_ERR_OK on success,
2720 * JB_ERR_PARSE or JB_ERR_MEMORY otherwise
2722 *********************************************************************/
2723 static jb_err process_encrypted_request_headers(struct client_state *csp)
2728 /* Temporary copy of the client's headers before they get enlisted in csp->https_headers */
2729 struct list header_list;
2730 struct list *headers = &header_list;
2732 assert(csp->ssl_with_client_is_opened);
2734 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2735 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
2737 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2740 err = receive_encrypted_request_headers(csp);
2741 if (err != JB_ERR_OK)
2743 if (csp->client_iob->cur == NULL ||
2744 csp->client_iob->cur == csp->client_iob->eod)
2747 * We did not receive any data, most likely because the
2748 * client is done. Don't log this as a parse failure.
2750 return JB_ERR_PARSE;
2752 /* XXX: Also used for JB_ERR_MEMORY */
2753 log_error(LOG_LEVEL_ERROR, "Failed to receive encrypted request: %s",
2754 jb_err_to_string(err));
2755 ssl_send_data_delayed(&(csp->ssl_client_attr),
2756 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2760 /* We don't need get_request_line() because the whole HTTP head is buffered. */
2761 request_line = get_header(csp->client_iob);
2762 if (request_line == NULL)
2764 log_error(LOG_LEVEL_ERROR, "Failed to get the encrypted request line");
2765 ssl_send_data_delayed(&(csp->ssl_client_attr),
2766 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2767 return JB_ERR_PARSE;
2769 assert(*request_line != '\0');
2771 if (client_protocol_is_unsupported(csp, request_line))
2774 * If the protocol is unsupported we're done here.
2775 * client_protocol_is_unsupported() took care of sending
2776 * the error response and logging the error message.
2778 return JB_ERR_PARSE;
2781 #ifdef FEATURE_FORCE_LOAD
2782 if (force_required(csp, request_line))
2784 csp->flags |= CSP_FLAG_FORCED;
2786 #endif /* def FEATURE_FORCE_LOAD */
2788 free_http_request(csp->http);
2790 err = parse_http_request(request_line, csp->http);
2791 /* XXX: Restore ssl setting. This is ugly */
2792 csp->http->client_ssl = 1;
2793 csp->http->server_ssl = 1;
2795 freez(request_line);
2796 if (JB_ERR_OK != err)
2798 ssl_send_data_delayed(&(csp->ssl_client_attr),
2799 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2800 /* XXX: Use correct size */
2801 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2802 log_error(LOG_LEVEL_ERROR,
2803 "Couldn't parse request line received from %s: %s",
2804 csp->ip_addr_str, jb_err_to_string(err));
2806 free_http_request(csp->http);
2807 return JB_ERR_PARSE;
2810 /* Parse the rest of the client's headers. */
2814 p = get_header(csp->client_iob);
2818 /* There are no additional headers to read. */
2825 if (JB_ERR_OK != get_destination_from_https_headers(headers, csp->http))
2828 * Our attempts to get the request destination
2831 log_error(LOG_LEVEL_ERROR,
2832 "Failed to get the encrypted request destination");
2833 ssl_send_data_delayed(&(csp->ssl_client_attr),
2834 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2835 destroy_list(headers);
2837 return JB_ERR_PARSE;
2840 /* Split the domain we just got for pattern matching */
2841 init_domain_components(csp->http);
2843 #ifdef FEATURE_CLIENT_TAGS
2844 /* XXX: If the headers were enlisted sooner, passing csp would do. */
2845 if (csp->client_address == NULL)
2847 set_client_address(csp, headers);
2848 get_tag_list_for_client(csp->client_tags, csp->client_address);
2852 #ifdef FEATURE_TOGGLE
2853 if ((csp->flags & CSP_FLAG_TOGGLED_ON) != 0)
2857 * Determine the actions for this request after
2858 * clearing the ones from the previous one.
2860 free_current_action(csp->action);
2861 get_url_actions(csp, csp->http);
2864 enlist(csp->https_headers, csp->http->cmd);
2866 /* Append the previously read headers */
2867 err = list_append_list_unique(csp->https_headers, headers);
2868 destroy_list(headers);
2869 if (JB_ERR_OK != err)
2871 /* XXX: Send error message */
2875 /* XXX: Work around crash */
2876 csp->error_message = NULL;
2878 /* XXX: Why do this here? */
2881 err = sed_https(csp);
2882 if (JB_ERR_OK != err)
2884 ssl_send_data_delayed(&(csp->ssl_client_attr),
2885 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2886 log_error(LOG_LEVEL_ERROR, "Failed to parse client request from %s.",
2888 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
2889 csp->ip_addr_str, csp->http->cmd);
2890 return JB_ERR_PARSE;
2893 if ((NULL == csp->https_headers->first->str)
2894 || (strcmp(csp->http->cmd, csp->https_headers->first->str) &&
2895 (JB_ERR_OK != change_encrypted_request_destination(csp))))
2897 ssl_send_data_delayed(&(csp->ssl_client_attr),
2898 (const unsigned char *)MESSED_UP_REQUEST_RESPONSE,
2899 strlen(MESSED_UP_REQUEST_RESPONSE), get_write_delay(csp));
2900 log_error(LOG_LEVEL_ERROR,
2901 "Invalid request line after applying header filters.");
2902 /* XXX: Use correct size */
2903 log_error(LOG_LEVEL_CLF,
2904 "%s - - [%T] \"Invalid request generated\" 400 0", csp->ip_addr_str);
2906 return JB_ERR_PARSE;
2909 log_error(LOG_LEVEL_HEADER, "Encrypted request headers processed");
2910 log_error(LOG_LEVEL_REQUEST, "https://%s%s", csp->http->hostport,
2917 /*********************************************************************
2919 * Function : cgi_page_requested
2921 * Description : Checks if a request is for an internal CGI page.
2924 * 1 : host = The host requested by the client.
2926 * Returns : 1 if a CGI page has been requested, 0 otherwise
2928 *********************************************************************/
2929 static int cgi_page_requested(const char *host)
2931 if ((0 == strcmpic(host, CGI_SITE_1_HOST))
2932 || (0 == strcmpic(host, CGI_SITE_1_HOST "."))
2933 || (0 == strcmpic(host, CGI_SITE_2_HOST))
2934 || (0 == strcmpic(host, CGI_SITE_2_HOST ".")))
2944 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2945 /*********************************************************************
2947 * Function : continue_https_chat
2949 * Description : Behaves similar to chat() but only deals with
2950 * https-inspected requests that arrive on an already
2951 * established connection. The first request is always
2952 * served by chat() which is a lot more complex as it
2953 * has to deal with forwarding settings and connection
2956 * If a connection to the server has already been
2957 * opened it is reused unless the request is blocked
2958 * or the forwarder changed.
2960 * If a connection to the server has not yet been
2961 * opened (because the previous request was crunched),
2962 * or the forwarder changed, the connection is dropped
2963 * so that the client retries on a fresh one.
2966 * 1 : csp = Current client state (buffers, headers, etc...)
2968 * Returns : Nothing.
2970 *********************************************************************/
2971 static void continue_https_chat(struct client_state *csp)
2973 const struct forward_spec *fwd;
2975 if (JB_ERR_OK != process_encrypted_request_headers(csp))
2977 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2981 #if defined(FEATURE_STATISTICS) && defined(MUTEX_LOCKS_AVAILABLE)
2982 privoxy_mutex_lock(&block_statistics_mutex);
2983 number_of_requests_received++;
2984 privoxy_mutex_unlock(&block_statistics_mutex);
2987 csp->requests_received_total++;
2990 * We have an encrypted request. Check if one of the crunchers wants it.
2992 if (crunch_response_triggered(csp, crunchers_all))
2995 * Yes. The client got the crunch response and we're done here.
2999 if (csp->ssl_with_server_is_opened == 0)
3001 log_error(LOG_LEVEL_CONNECT,
3002 "Dropping the client connection on socket %d. "
3003 "The server connection has not been established yet.",
3005 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
3008 assert(csp->server_connection.sfd != JB_INVALID_SOCKET);
3010 fwd = forward_url(csp, csp->http);
3011 if (!connection_destination_matches(&csp->server_connection, csp->http, fwd))
3013 log_error(LOG_LEVEL_CONNECT,
3014 "Dropping the client connection on socket %d with "
3015 "server socket %d connected to %s. The forwarder has changed.",
3016 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
3017 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
3021 log_applied_actions(csp->action);
3023 log_error(LOG_LEVEL_CONNECT,
3024 "Reusing server socket %d connected to %s. Requests already sent: %u.",
3025 csp->server_connection.sfd, csp->server_connection.host,
3026 csp->server_connection.requests_sent_total);
3028 if (send_https_request(csp))
3031 * Most likely the server connection timed out. We can't easily
3032 * create a new one so simply drop the client connection without a
3033 * error response to let the client retry.
3035 log_error(LOG_LEVEL_CONNECT,
3036 "Dropping client connection on socket %d. "
3037 "Forwarding the encrypted client request failed.",
3041 csp->server_connection.request_sent = time(NULL);
3042 csp->server_connection.requests_sent_total++;
3043 handle_established_connection(csp);
3044 freez(csp->receive_buffer);
3046 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3050 /*********************************************************************
3052 * Function : handle_established_connection
3054 * Description : Shuffle data between client and server once the
3055 * connection has been established and the request
3059 * 1 : csp = Current client state (buffers, headers, etc...)
3061 * Returns : Nothing.
3063 *********************************************************************/
3064 static void handle_established_connection(struct client_state *csp)
3070 struct pollfd poll_fds[2];
3074 struct timeval timeout;
3077 int ms_iis5_hack = 0;
3078 unsigned long long byte_count = 0;
3079 struct http_request *http;
3080 long len = 0; /* for buffer sizes (and negative error codes) */
3081 int buffer_and_filter_content = 0;
3082 unsigned int write_delay;
3083 #ifdef FEATURE_HTTPS_INSPECTION
3085 int use_ssl_tunnel = 0;
3086 csp->dont_verify_certificate = 0;
3088 if (csp->http->ssl && !(csp->action->flags & ACTION_HTTPS_INSPECTION))
3090 /* Pass encrypted content without filtering. */
3095 /* Skeleton for HTTP response, if we should intercept the request */
3096 struct http_response *rsp;
3097 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3098 int watch_client_socket;
3101 csp->receive_buffer_size = csp->config->receive_buffer_size;
3102 csp->receive_buffer = zalloc(csp->receive_buffer_size + 1);
3103 if (csp->receive_buffer == NULL)
3105 log_error(LOG_LEVEL_ERROR,
3106 "Out of memory. Failed to allocate the receive buffer.");
3107 rsp = cgi_error_memory();
3108 send_crunch_response(csp, rsp);
3115 maxfd = (csp->cfd > csp->server_connection.sfd) ?
3116 csp->cfd : csp->server_connection.sfd;
3119 /* pass data between the client and server
3120 * until one or the other shuts down the connection.
3125 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3126 watch_client_socket = 0 == (csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING);
3128 write_delay = get_write_delay(csp);
3132 #ifdef FEATURE_HTTPS_INSPECTION
3133 if (server_use_ssl(csp) && is_ssl_pending(&(csp->ssl_server_attr)))
3136 * It's possible that the TLS library already consumed all the
3137 * data the server intends to send. If that happens poll() and
3138 * select() will no longer see the data as available so we have
3139 * to skip the calls.
3141 goto server_wants_to_talk;
3143 if (watch_client_socket && client_use_ssl(csp) &&
3144 is_ssl_pending(&(csp->ssl_client_attr)))
3147 * The TLS libray may also consume all of the remaining data
3148 * from the client when we're shuffling the data from an
3149 * unbuffered request body to the server.
3151 goto client_wants_to_talk;
3156 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3157 if (!watch_client_socket)
3159 maxfd = csp->server_connection.sfd;
3162 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3164 FD_SET(csp->cfd, &rfds);
3167 FD_SET(csp->server_connection.sfd, &rfds);
3168 #endif /* ndef HAVE_POLL */
3170 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3171 if ((csp->flags & CSP_FLAG_CHUNKED)
3172 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3173 && ((csp->iob->eod - csp->iob->cur) >= 5)
3174 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
3177 * XXX: This check should be obsolete now,
3178 * but let's wait a while to be sure.
3180 log_error(LOG_LEVEL_CONNECT,
3181 "Looks like we got the last chunk together with "
3182 "the server headers but didn't detect it earlier. "
3183 "We better stop reading.");
3184 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
3185 csp->expected_content_length = byte_count;
3186 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
3188 if (server_body && server_response_is_complete(csp, byte_count))
3190 if (csp->expected_content_length == byte_count)
3192 log_error(LOG_LEVEL_CONNECT,
3193 "Done reading from server. Content length: %llu as expected. "
3194 "Bytes most recently read: %ld.",
3199 log_error(LOG_LEVEL_CONNECT,
3200 "Done reading from server. Expected content length: %llu. "
3201 "Actual content length: %llu. Bytes most recently read: %ld.",
3202 csp->expected_content_length, byte_count, len);
3206 * XXX: Should not jump around, handle_established_connection()
3207 * is complicated enough already.
3211 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
3214 poll_fds[0].fd = csp->cfd;
3215 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3216 if (!watch_client_socket)
3219 * Ignore incoming data, but still watch out
3220 * for disconnects etc. These flags are always
3221 * implied anyway but explicitly setting them
3224 poll_fds[0].events = POLLERR|POLLHUP;
3229 poll_fds[0].events = POLLIN;
3231 poll_fds[1].fd = csp->server_connection.sfd;
3232 poll_fds[1].events = POLLIN;
3233 n = poll(poll_fds, 2, csp->config->socket_timeout * 1000);
3235 timeout.tv_sec = csp->config->socket_timeout;
3236 timeout.tv_usec = 0;
3237 n = select((int)maxfd + 1, &rfds, NULL, NULL, &timeout);
3238 #endif /* def HAVE_POLL */
3240 /* Server or client not responding in timeout */
3243 log_error(LOG_LEVEL_CONNECT, "Socket timeout %d reached: %s",
3244 csp->config->socket_timeout, http->url);
3245 if ((byte_count == 0) && (http->ssl == 0))
3247 send_crunch_response(csp, error_response(csp, "connection-timeout"));
3249 mark_server_socket_tainted(csp);
3250 #ifdef FEATURE_HTTPS_INSPECTION
3251 close_client_and_server_ssl_connections(csp);
3258 log_error(LOG_LEVEL_ERROR, "poll() failed!: %E");
3260 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
3262 mark_server_socket_tainted(csp);
3263 #ifdef FEATURE_HTTPS_INSPECTION
3264 close_client_and_server_ssl_connections(csp);
3270 * This is the body of the browser's request,
3271 * just read and write it.
3273 * Receives data from browser and sends it to server
3275 * XXX: Make sure the client doesn't use pipelining
3276 * behind Privoxy's back.
3279 if ((poll_fds[0].revents & (POLLERR|POLLHUP|POLLNVAL)) != 0)
3281 log_error(LOG_LEVEL_CONNECT,
3282 "The client socket %d has become unusable while "
3283 "the server socket %d is still open.",
3284 csp->cfd, csp->server_connection.sfd);
3285 mark_server_socket_tainted(csp);
3289 if (poll_fds[0].revents != 0)
3291 if (FD_ISSET(csp->cfd, &rfds))
3292 #endif /* def HAVE_POLL*/
3294 int max_bytes_to_read;
3296 #ifdef FEATURE_HTTPS_INSPECTION
3297 client_wants_to_talk:
3300 max_bytes_to_read = (int)csp->receive_buffer_size;
3302 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3303 if ((csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
3305 if (data_is_available(csp->cfd, 0))
3308 * If the next request is already waiting, we have
3309 * to stop select()ing the client socket. Otherwise
3310 * we would always return right away and get nothing
3313 watch_client_socket = 0;
3314 log_error(LOG_LEVEL_CONNECT,
3315 "Stop watching client socket %d. "
3316 "There's already another request waiting.",
3321 * If the client socket is set, but there's no data
3322 * available on the socket, the client went fishing
3323 * and continuing talking to the server makes no sense.
3325 log_error(LOG_LEVEL_CONNECT,
3326 "The client closed socket %d while "
3327 "the server socket %d is still open.",
3328 csp->cfd, csp->server_connection.sfd);
3329 mark_server_socket_tainted(csp);
3332 if (csp->expected_client_content_length != 0)
3334 if (csp->expected_client_content_length < csp->receive_buffer_size)
3336 max_bytes_to_read = (int)csp->expected_client_content_length;
3338 log_error(LOG_LEVEL_CONNECT,
3339 "Waiting for up to %d bytes from the client.",
3342 assert(max_bytes_to_read <= csp->receive_buffer_size);
3343 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3345 #ifdef FEATURE_HTTPS_INSPECTION
3346 if (client_use_ssl(csp))
3348 if (csp->http->status == 101)
3350 len = ssl_recv_data(&(csp->ssl_client_attr),
3351 (unsigned char *)csp->receive_buffer,
3352 (size_t)max_bytes_to_read);
3355 log_error(LOG_LEVEL_ERROR, "Failed to receive data "
3356 "on client socket %d for an upgraded connection",
3362 log_error(LOG_LEVEL_CONNECT, "Done receiving data "
3363 "on client socket %d for an upgraded connection",
3367 byte_count += (unsigned long long)len;
3368 len = ssl_send_data(&(csp->ssl_server_attr),
3369 (unsigned char *)csp->receive_buffer, (size_t)len);
3372 log_error(LOG_LEVEL_ERROR, "Failed to send data "
3373 "on server socket %d for an upgraded connection",
3374 csp->server_connection.sfd);
3379 log_error(LOG_LEVEL_CONNECT, "Breaking with TLS/SSL.");
3383 #endif /* def FEATURE_HTTPS_INSPECTION */
3385 len = read_socket(csp->cfd, csp->receive_buffer, max_bytes_to_read);
3389 /* XXX: not sure if this is necessary. */
3390 mark_server_socket_tainted(csp);
3391 break; /* "game over, man" */
3394 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3395 if (csp->expected_client_content_length != 0)
3397 assert(len <= max_bytes_to_read);
3398 csp->expected_client_content_length -= (unsigned)len;
3399 log_error(LOG_LEVEL_CONNECT,
3400 "Expected client content length set to %llu "
3401 "after reading %ld bytes.",
3402 csp->expected_client_content_length, len);
3403 if (csp->expected_client_content_length == 0)
3405 log_error(LOG_LEVEL_CONNECT,
3406 "Done reading from the client.");
3407 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
3410 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3412 if (write_socket(csp->server_connection.sfd, csp->receive_buffer, (size_t)len))
3414 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
3415 mark_server_socket_tainted(csp);
3423 * The server wants to talk. It could be the header or the body.
3424 * If `hdr' is null, then it's the header otherwise it's the body.
3425 * FIXME: Does `hdr' really mean `host'? No.
3428 if (poll_fds[1].revents != 0)
3430 if (FD_ISSET(csp->server_connection.sfd, &rfds))
3431 #endif /* HAVE_POLL */
3433 #ifdef FEATURE_HTTPS_INSPECTION
3434 server_wants_to_talk:
3436 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3438 * If we are buffering content, we don't want to eat up to
3439 * buffer-limit bytes if the client no longer cares about them.
3440 * If we aren't buffering, however, a dead client socket will be
3441 * noticed pretty much right away anyway, so we can reduce the
3442 * overhead by skipping the check.
3444 if (buffer_and_filter_content && !socket_is_still_alive(csp->cfd))
3447 log_error(LOG_LEVEL_CONNECT,
3448 "The server still wants to talk, but the client may already have hung up on us.");
3450 log_error(LOG_LEVEL_CONNECT,
3451 "The server still wants to talk, but the client hung up on us.");
3452 mark_server_socket_tainted(csp);
3453 #ifdef FEATURE_HTTPS_INSPECTION
3454 close_client_and_server_ssl_connections(csp);
3457 #endif /* def _WIN32 */
3459 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3461 #ifdef FEATURE_HTTPS_INSPECTION
3463 * Reading data from standard or secured connection (HTTP/HTTPS)
3465 if (server_use_ssl(csp))
3467 len = ssl_recv_data(&(csp->ssl_server_attr),
3468 (unsigned char *)csp->receive_buffer, csp->receive_buffer_size);
3473 len = read_socket(csp->server_connection.sfd, csp->receive_buffer,
3474 (int)csp->receive_buffer_size);
3479 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
3481 if ((http->ssl && (csp->fwd == NULL))
3482 #ifdef FEATURE_HTTPS_INSPECTION
3488 * Just hang up. We already confirmed the client's CONNECT
3489 * request with status code 200 and unencrypted content is
3490 * no longer welcome.
3492 log_error(LOG_LEVEL_ERROR,
3493 "CONNECT already confirmed. Unable to tell the client about the problem.");
3496 else if (byte_count)
3499 * Just hang up. We already transmitted the original headers
3500 * and parts of the original content and therefore missed the
3501 * chance to send an error message (without risking data corruption).
3503 * XXX: we could retry with a fancy range request here.
3505 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
3506 "Unable to tell the client about the problem.");
3507 mark_server_socket_tainted(csp);
3508 #ifdef FEATURE_HTTPS_INSPECTION
3509 close_client_and_server_ssl_connections(csp);
3514 * XXX: Consider handling the cases above the same.
3516 mark_server_socket_tainted(csp);
3520 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3521 if (csp->flags & CSP_FLAG_CHUNKED)
3523 if ((len >= 5) && !memcmp(csp->receive_buffer+len-5, "0\r\n\r\n", 5))
3525 /* XXX: this is a temporary hack */
3526 log_error(LOG_LEVEL_CONNECT,
3527 "Looks like we reached the end of the last chunk. "
3528 "We better stop reading.");
3529 csp->expected_content_length = byte_count + (unsigned long long)len;
3530 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
3534 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
3537 * This is guaranteed by allocating with zalloc_or_die()
3538 * and never (intentionally) writing to the last byte.
3540 * csp->receive_buffer_size is the size of the part of the
3541 * buffer we intentionally write to, but we actually
3542 * allocated csp->receive_buffer_size+1 bytes so the assertion
3543 * stays within the allocated range.
3545 assert(csp->receive_buffer[csp->receive_buffer_size] == '\0');
3548 * Add a trailing zero to let be able to use string operations.
3549 * XXX: do we still need this with filter_popups gone?
3551 assert(len <= csp->receive_buffer_size);
3552 csp->receive_buffer[len] = '\0';
3555 * Normally, this would indicate that we've read
3556 * as much as the server has sent us and we can
3557 * close the client connection. However, Microsoft
3558 * in its wisdom has released IIS/5 with a bug that
3559 * prevents it from sending the trailing \r\n in
3560 * a 302 redirect header (and possibly other headers).
3561 * To work around this if we've haven't parsed
3562 * a full header we'll append a trailing \r\n
3563 * and see if this now generates a valid one.
3565 * This hack shouldn't have any impacts. If we've
3566 * already transmitted the header or if this is a
3567 * SSL connection, then we won't bother with this
3568 * hack. So we only work on partially received
3569 * headers. If we append a \r\n and this still
3570 * doesn't generate a valid header, then we won't
3571 * transmit anything to the client.
3576 if (server_body || (http->ssl
3577 #ifdef FEATURE_HTTPS_INSPECTION
3583 * If we have been buffering up the document,
3584 * now is the time to apply content modification
3585 * and send the result to the client.
3587 if (buffer_and_filter_content)
3589 p = execute_content_filters(csp);
3591 * If content filtering fails, use the original
3592 * buffer and length.
3593 * (see p != NULL ? p : csp->iob->cur below)
3597 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
3599 #ifdef FEATURE_COMPRESSION
3600 else if ((csp->flags & CSP_FLAG_CLIENT_SUPPORTS_DEFLATE)
3601 && (csp->content_length > LOWER_LENGTH_LIMIT_FOR_COMPRESSION))
3603 char *compressed_content = compress_buffer(p,
3604 (size_t *)&csp->content_length, csp->config->compression_level);
3605 if (compressed_content != NULL)
3608 p = compressed_content;
3609 csp->flags |= CSP_FLAG_BUFFERED_CONTENT_DEFLATED;
3614 if (JB_ERR_OK != update_server_headers(csp))
3616 log_error(LOG_LEVEL_FATAL,
3617 "Failed to update server headers. after filtering.");
3620 hdr = list_to_text(csp->headers);
3623 /* FIXME Should handle error properly */
3624 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3627 #ifdef FEATURE_HTTPS_INSPECTION
3629 * Sending data with standard or secured connection (HTTP/HTTPS)
3631 if (client_use_ssl(csp))
3633 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
3634 (const unsigned char *)hdr, strlen(hdr),
3635 get_write_delay(csp)) < 0)
3636 || (ssl_send_data_delayed(&(csp->ssl_client_attr),
3637 (const unsigned char *) ((p != NULL) ? p : csp->iob->cur),
3638 csp->content_length, get_write_delay(csp)) < 0))
3640 log_error(LOG_LEVEL_ERROR,
3641 "Failed to send the modified content to the client over TLS");
3644 mark_server_socket_tainted(csp);
3645 close_client_and_server_ssl_connections(csp);
3650 #endif /* def FEATURE_HTTPS_INSPECTION */
3652 if (write_socket_delayed(csp->cfd, hdr, strlen(hdr), write_delay)
3653 || write_socket_delayed(csp->cfd, ((p != NULL) ? p : csp->iob->cur),
3654 (size_t)csp->content_length, write_delay))
3656 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
3659 mark_server_socket_tainted(csp);
3668 break; /* "game over, man" */
3672 * This is not the body, so let's pretend the server just sent
3675 snprintf(csp->receive_buffer, csp->receive_buffer_size, "\r\n");
3676 len = (int)strlen(csp->receive_buffer);
3679 * Now, let the normal header parsing algorithm below do its
3680 * job. If it fails, we'll exit instead of continuing.
3687 * If we're in the body of the server document, just write it to
3688 * the client, unless we need to buffer the body for later
3689 * content-filtering.
3691 if (server_body || (http->ssl
3692 #ifdef FEATURE_HTTPS_INSPECTION
3697 if (buffer_and_filter_content)
3700 * If there is no memory left for buffering the content, or the buffer limit
3701 * has been reached, switch to non-filtering mode, i.e. make & write the
3702 * header, flush the iob and buf, and get out of the way.
3704 if (add_to_iob(csp->iob, csp->config->buffer_limit, csp->receive_buffer, len))
3709 log_error(LOG_LEVEL_INFO,
3710 "Flushing header and buffers. Stepping back from filtering.");
3712 hdr = list_to_text(csp->headers);
3716 * Memory is too tight to even generate the header.
3717 * Send our static "Out-of-memory" page.
3719 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
3720 rsp = cgi_error_memory();
3721 send_crunch_response(csp, rsp);
3722 mark_server_socket_tainted(csp);
3723 #ifdef FEATURE_HTTPS_INSPECTION
3724 close_client_and_server_ssl_connections(csp);
3728 hdrlen = strlen(hdr);
3730 #ifdef FEATURE_HTTPS_INSPECTION
3732 * Sending data with standard or secured connection (HTTP/HTTPS)
3734 if (client_use_ssl(csp))
3736 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
3737 (const unsigned char *)hdr, hdrlen, get_write_delay(csp)) < 0)
3738 || ((flushed = ssl_flush_socket(&(csp->ssl_client_attr),
3740 || (ssl_send_data_delayed(&(csp->ssl_client_attr),
3741 (const unsigned char *)csp->receive_buffer, (size_t)len,
3742 get_write_delay(csp)) < 0))
3744 log_error(LOG_LEVEL_CONNECT,
3745 "Flush header and buffers to client failed");
3747 mark_server_socket_tainted(csp);
3748 close_client_and_server_ssl_connections(csp);
3753 #endif /* def FEATURE_HTTPS_INSPECTION */
3755 if (write_socket_delayed(csp->cfd, hdr, hdrlen, write_delay)
3756 || ((flushed = flush_iob(csp->cfd, csp->iob, write_delay)) < 0)
3757 || write_socket_delayed(csp->cfd, csp->receive_buffer, (size_t)len,
3760 log_error(LOG_LEVEL_CONNECT,
3761 "Flush header and buffers to client failed: %E");
3763 mark_server_socket_tainted(csp);
3769 * Reset the byte_count to the amount of bytes
3770 * we just flushed. len will be added a few lines below,
3771 * hdrlen doesn't matter for LOG_LEVEL_CLF.
3773 byte_count = (unsigned long long)flushed;
3775 buffer_and_filter_content = 0;
3781 #ifdef FEATURE_HTTPS_INSPECTION
3783 * Sending data with standard or secured connection (HTTP/HTTPS)
3785 if (client_use_ssl(csp))
3787 ret = ssl_send_data_delayed(&(csp->ssl_client_attr),
3788 (const unsigned char *)csp->receive_buffer, (size_t)len,
3789 get_write_delay(csp));
3792 log_error(LOG_LEVEL_ERROR,
3793 "Sending data to client failed");
3794 mark_server_socket_tainted(csp);
3795 close_client_and_server_ssl_connections(csp);
3800 #endif /* def FEATURE_HTTPS_INSPECTION */
3802 if (write_socket_delayed(csp->cfd, csp->receive_buffer,
3803 (size_t)len, write_delay))
3805 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
3806 mark_server_socket_tainted(csp);
3811 byte_count += (unsigned long long)len;
3817 * We're still looking for the end of the server's header.
3818 * Buffer up the data we just read. If that fails, there's
3819 * little we can do but send our static out-of-memory page.
3821 if (add_to_iob(csp->iob, csp->config->buffer_limit, csp->receive_buffer, len))
3823 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
3824 rsp = cgi_error_memory();
3825 send_crunch_response(csp, rsp);
3826 mark_server_socket_tainted(csp);
3827 #ifdef FEATURE_HTTPS_INSPECTION
3828 close_client_and_server_ssl_connections(csp);
3833 /* Convert iob into something sed() can digest */
3834 if (JB_ERR_PARSE == get_server_headers(csp))
3839 * Well, we tried our MS IIS/5 hack and it didn't work.
3840 * The header is incomplete and there isn't anything
3841 * we can do about it.
3843 log_error(LOG_LEVEL_ERROR, "Invalid server headers. "
3844 "Applying the MS IIS5 hack didn't help.");
3845 log_error(LOG_LEVEL_CLF,
3846 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3847 #ifdef FEATURE_HTTPS_INSPECTION
3849 * Sending data with standard or secured connection (HTTP/HTTPS)
3851 if (client_use_ssl(csp))
3853 ssl_send_data_delayed(&(csp->ssl_client_attr),
3854 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3855 strlen(INVALID_SERVER_HEADERS_RESPONSE), get_write_delay(csp));
3858 #endif /* def FEATURE_HTTPS_INSPECTION */
3860 write_socket_delayed(csp->cfd,
3861 INVALID_SERVER_HEADERS_RESPONSE,
3862 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
3864 mark_server_socket_tainted(csp);
3865 #ifdef FEATURE_HTTPS_INSPECTION
3866 close_client_and_server_ssl_connections(csp);
3873 * Since we have to wait for more from the server before
3874 * we can parse the headers we just continue here.
3876 log_error(LOG_LEVEL_CONNECT,
3877 "Continuing buffering server headers from socket %d. "
3878 "Bytes most recently read: %ld.", csp->cfd, len);
3885 * Account for the content bytes we
3886 * might have gotten with the headers.
3888 assert(csp->iob->eod >= csp->iob->cur);
3889 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
3892 /* Did we actually get anything? */
3893 if (NULL == csp->headers->first)
3895 if ((csp->flags & CSP_FLAG_REUSED_CLIENT_CONNECTION))
3897 log_error(LOG_LEVEL_ERROR,
3898 "No server or forwarder response received on socket %d. "
3899 "Closing client socket %d without sending data.",
3900 csp->server_connection.sfd, csp->cfd);
3901 log_error(LOG_LEVEL_CLF,
3902 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3906 log_error(LOG_LEVEL_ERROR,
3907 "No server or forwarder response received on socket %d.",
3908 csp->server_connection.sfd);
3909 send_crunch_response(csp, error_response(csp, "no-server-data"));
3911 free_http_request(http);
3912 mark_server_socket_tainted(csp);
3913 #ifdef FEATURE_HTTPS_INSPECTION
3914 close_client_and_server_ssl_connections(csp);
3919 if (!csp->headers->first->str)
3921 log_error(LOG_LEVEL_ERROR, "header search: csp->headers->first->str == NULL, assert will be called");
3923 assert(csp->headers->first->str);
3925 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3926 strncmpic(csp->headers->first->str, "ICY", 3))
3929 * It doesn't look like a HTTP (or Shoutcast) response:
3930 * tell the client and log the problem.
3932 if (strlen(csp->headers->first->str) > 30)
3934 csp->headers->first->str[30] = '\0';
3936 log_error(LOG_LEVEL_ERROR,
3937 "Invalid server or forwarder response. Starts with: %s",
3938 csp->headers->first->str);
3939 log_error(LOG_LEVEL_CLF,
3940 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3941 #ifdef FEATURE_HTTPS_INSPECTION
3943 * Sending data with standard or secured connection (HTTP/HTTPS)
3945 if (client_use_ssl(csp))
3947 ssl_send_data_delayed(&(csp->ssl_client_attr),
3948 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3949 strlen(INVALID_SERVER_HEADERS_RESPONSE),
3950 get_write_delay(csp));
3953 #endif /* def FEATURE_HTTPS_INSPECTION */
3955 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3956 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
3958 free_http_request(http);
3959 mark_server_socket_tainted(csp);
3960 #ifdef FEATURE_HTTPS_INSPECTION
3961 close_client_and_server_ssl_connections(csp);
3967 * Disable redirect checkers, so that they will be only run
3968 * again if the user also enables them through tags.
3970 * From a performance point of view it doesn't matter,
3971 * but it prevents duplicated log messages.
3973 #ifdef FEATURE_FAST_REDIRECTS
3974 csp->action->flags &= ~ACTION_FAST_REDIRECTS;
3976 csp->action->flags &= ~ACTION_REDIRECT;
3979 * We have now received the entire server header,
3980 * filter it and send the result to the client
3982 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3984 log_error(LOG_LEVEL_CLF,
3985 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3986 #ifdef FEATURE_HTTPS_INSPECTION
3988 * Sending data with standard or secured connection (HTTP/HTTPS)
3990 if (client_use_ssl(csp))
3992 ssl_send_data_delayed(&(csp->ssl_client_attr),
3993 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3994 strlen(INVALID_SERVER_HEADERS_RESPONSE),
3995 get_write_delay(csp));
4000 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
4001 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
4003 free_http_request(http);
4004 mark_server_socket_tainted(csp);
4005 #ifdef FEATURE_HTTPS_INSPECTION
4006 close_client_and_server_ssl_connections(csp);
4010 hdr = list_to_text(csp->headers);
4013 /* FIXME Should handle error properly */
4014 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
4017 if ((csp->flags & CSP_FLAG_CHUNKED)
4018 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
4019 && ((csp->iob->eod - csp->iob->cur) >= 5)
4020 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
4022 log_error(LOG_LEVEL_CONNECT,
4023 "Looks like we got the last chunk together with "
4024 "the server headers. We better stop reading.");
4025 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
4026 csp->expected_content_length = byte_count;
4027 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
4030 csp->server_connection.response_received = time(NULL);
4032 if (crunch_response_triggered(csp, crunchers_light))
4035 * One of the tags created by a server-header
4036 * tagger triggered a crunch. We already
4037 * delivered the crunch response to the client
4038 * and are done here after cleaning up.
4041 mark_server_socket_tainted(csp);
4042 #ifdef FEATURE_HTTPS_INSPECTION
4043 close_client_and_server_ssl_connections(csp);
4048 /* Buffer and pcrs filter this if appropriate. */
4049 buffer_and_filter_content = content_requires_filtering(csp);
4051 if (!buffer_and_filter_content)
4054 * Write the server's (modified) header to
4055 * the client (along with anything else that
4056 * may be in the buffer). Use standard or secured
4059 #ifdef FEATURE_HTTPS_INSPECTION
4060 if (client_use_ssl(csp))
4062 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
4063 (const unsigned char *)hdr, strlen(hdr),
4064 get_write_delay(csp)) < 0)
4065 || ((len = ssl_flush_socket(&(csp->ssl_client_attr),
4068 log_error(LOG_LEVEL_CONNECT, "Write header to client failed");
4071 * The write failed, so don't bother mentioning it
4072 * to the client... it probably can't hear us anyway.
4075 mark_server_socket_tainted(csp);
4076 #ifdef FEATURE_HTTPS_INSPECTION
4077 close_client_and_server_ssl_connections(csp);
4083 #endif /* def FEATURE_HTTPS_INSPECTION */
4085 if (write_socket_delayed(csp->cfd, hdr, strlen(hdr), write_delay)
4086 || ((len = flush_iob(csp->cfd, csp->iob, write_delay)) < 0))
4088 log_error(LOG_LEVEL_ERROR,
4089 "write header to client failed");
4091 * The write failed, so don't bother mentioning it
4092 * to the client... it probably can't hear us anyway.
4095 mark_server_socket_tainted(csp);
4101 /* we're finished with the server's header */
4107 * If this was a MS IIS/5 hack then it means the server
4108 * has already closed the connection. Nothing more to read.
4113 log_error(LOG_LEVEL_ERROR,
4114 "Closed server connection detected. "
4115 "Applying the MS IIS5 hack didn't help.");
4116 log_error(LOG_LEVEL_CLF,
4117 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
4118 #ifdef FEATURE_HTTPS_INSPECTION
4120 * Sending data with standard or secured connection (HTTP/HTTPS)
4122 if (client_use_ssl(csp))
4124 ssl_send_data_delayed(&(csp->ssl_client_attr),
4125 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
4126 strlen(INVALID_SERVER_HEADERS_RESPONSE),
4127 get_write_delay(csp));
4130 #endif /* def FEATURE_HTTPS_INSPECTION */
4132 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
4133 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
4135 mark_server_socket_tainted(csp);
4136 #ifdef FEATURE_HTTPS_INSPECTION
4137 close_client_and_server_ssl_connections(csp);
4144 mark_server_socket_tainted(csp);
4145 #ifdef FEATURE_HTTPS_INSPECTION
4146 close_client_and_server_ssl_connections(csp);
4148 return; /* huh? we should never get here */
4151 if (csp->content_length == 0)
4154 * If Privoxy didn't recalculate the Content-Length,
4155 * byte_count is still correct.
4157 csp->content_length = byte_count;
4160 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4161 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
4162 && (csp->expected_content_length != byte_count))
4164 log_error(LOG_LEVEL_CONNECT,
4165 "Received %llu bytes while expecting %llu.",
4166 byte_count, csp->expected_content_length);
4167 mark_server_socket_tainted(csp);
4171 #ifdef FEATURE_HTTPS_INSPECTION
4172 if (client_use_ssl(csp))
4174 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s https://%s%s %s\" 200 %llu",
4175 csp->ip_addr_str, http->gpc, http->hostport, http->path,
4176 http->version, csp->content_length);
4181 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
4182 csp->ip_addr_str, http->ocmd, csp->content_length);
4184 csp->server_connection.timestamp = time(NULL);
4188 /*********************************************************************
4192 * Description : Once a connection from the client has been accepted,
4193 * this function is called (via serve()) to handle the
4194 * main business of the communication. This function
4195 * returns after dealing with a single request. It can
4196 * be called multiple times with the same client socket
4197 * if the client is keeping the connection alive.
4199 * The decision whether or not a client connection will
4200 * be kept alive is up to the caller which also must
4201 * close the client socket when done.
4203 * FIXME: chat is nearly thousand lines long.
4207 * 1 : csp = Current client state (buffers, headers, etc...)
4209 * Returns : Nothing.
4211 *********************************************************************/
4212 static void chat(struct client_state *csp)
4214 const struct forward_spec *fwd;
4215 struct http_request *http;
4216 /* Skeleton for HTTP response, if we should intercept the request */
4217 struct http_response *rsp;
4218 #ifdef FEATURE_HTTPS_INSPECTION
4219 int use_ssl_tunnel = 0;
4224 if (receive_client_request(csp) != JB_ERR_OK)
4229 #if defined(FEATURE_STATISTICS) && defined(MUTEX_LOCKS_AVAILABLE)
4230 privoxy_mutex_lock(&block_statistics_mutex);
4231 number_of_requests_received++;
4232 privoxy_mutex_unlock(&block_statistics_mutex);
4235 if (parse_client_request(csp) != JB_ERR_OK)
4240 #ifdef FEATURE_HTTPS_INSPECTION
4242 * Setting flags to use old solution with SSL tunnel and to disable
4243 * certificate verification.
4245 if (csp->http->ssl && !(csp->action->flags & ACTION_HTTPS_INSPECTION)
4246 && !cgi_page_requested(csp->http->host))
4251 if (http->ssl && (csp->action->flags & ACTION_IGNORE_CERTIFICATE_ERRORS))
4253 csp->dont_verify_certificate = 1;
4258 * build the http request to send to the server
4259 * we have to do one of the following:
4261 * create = use the original HTTP request to create a new
4262 * HTTP request that has either the path component
4263 * without the http://domainspec (w/path) or the
4264 * full orininal URL (w/url)
4265 * Note that the path and/or the HTTP version may
4266 * have been altered by now.
4268 * SSL proxy = Open a socket to the host:port of the server
4269 * and create TLS/SSL connection with server and
4270 * with client. Then behave like mediator between
4271 * client and server over TLS/SSL.
4273 * SSL proxy = Pass the request unchanged if forwarding a CONNECT
4274 * with request to a parent proxy. Note that we'll be sending
4275 * forwarding the CFAIL message ourselves if connecting to the parent
4276 * fails, but we won't send a CSUCCEED message if it works,
4277 * since that would result in a double message (ours and the
4278 * parent's). After sending the request to the parent, we
4279 * must parse answer and send it to client. If connection
4280 * with server is established, we do TLS/SSL proxy. Otherwise
4281 * we send parent response to client and close connections.
4283 * here's the matrix:
4286 * +--------+--------+
4288 * 0 | create | SSL |
4289 * | w/path | proxy |
4290 * Forwarding +--------+--------+
4292 * 1 | create | proxy |
4293 * | w/url |+forward|
4294 * +--------+--------+
4298 #ifdef FEATURE_HTTPS_INSPECTION
4300 * Presetting SSL client and server flags
4302 if (http->ssl && !use_ssl_tunnel)
4304 http->client_ssl = 1;
4305 http->server_ssl = 1;
4309 http->client_ssl = 0;
4310 http->server_ssl = 0;
4314 #ifdef FEATURE_HTTPS_INSPECTION
4316 * Log the request unless we're https inspecting
4317 * in which case we don't have the path yet and
4318 * will log the request later.
4320 if (!client_use_ssl(csp))
4323 log_error(LOG_LEVEL_REQUEST, "%s%s", http->hostport, http->path);
4326 if (http->ssl && connect_port_is_forbidden(csp))
4328 const char *acceptable_connect_ports =
4329 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
4330 assert(NULL != acceptable_connect_ports);
4331 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
4332 "limit-connect{%s} doesn't allow CONNECT requests to %s",
4333 csp->ip_addr_str, acceptable_connect_ports, csp->http->hostport);
4334 csp->action->flags |= ACTION_BLOCK;
4336 #ifdef FEATURE_HTTPS_INSPECTION
4337 http->client_ssl = 0;
4338 http->server_ssl = 0;
4343 * We have a request. Check if one of the crunchers wants it
4344 * unless the client wants to use TLS/SSL in which case we
4345 * haven't setup the TLS context yet and will send the crunch
4349 #ifdef FEATURE_HTTPS_INSPECTION
4350 !client_use_ssl(csp) &&
4352 crunch_response_triggered(csp, crunchers_all))
4355 * Yes. The client got the crunch response and we're done here.
4360 #ifdef FEATURE_HTTPS_INSPECTION
4361 if (client_use_ssl(csp) && !use_ssl_tunnel)
4365 * Creating a SSL proxy.
4367 * By sending the CSUCCEED message we're lying to the client as
4368 * the connection hasn't actually been established yet. We don't
4369 * establish the connection until we have seen and parsed the
4370 * encrypted client headers.
4372 if (write_socket_delayed(csp->cfd, CSUCCEED,
4373 strlen(CSUCCEED), get_write_delay(csp)) != 0)
4375 log_error(LOG_LEVEL_ERROR, "Sending SUCCEED to client failed");
4379 ret = create_client_ssl_connection(csp);
4382 log_error(LOG_LEVEL_ERROR,
4383 "Failed to open a secure connection with the client");
4386 if (JB_ERR_OK != process_encrypted_request_headers(csp))
4388 close_client_ssl_connection(csp);
4392 * We have an encrypted request. Check if one of the crunchers now
4393 * wants it (for example because the previously invisible path was
4394 * required to match).
4396 if (crunch_response_triggered(csp, crunchers_all))
4399 * Yes. The client got the crunch response and we're done here.
4406 log_applied_actions(csp->action);
4408 /* decide how to route the HTTP request */
4409 fwd = forward_url(csp, http);
4411 freez(csp->headers->first->str);
4412 build_request_line(csp, fwd, &csp->headers->first->str);
4414 if (fwd->forward_host)
4416 log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
4417 fwd->forward_host, fwd->forward_port, http->hostport);
4421 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
4424 /* here we connect to the server, gateway, or the forwarder */
4426 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4427 if ((csp->server_connection.sfd != JB_INVALID_SOCKET)
4428 && socket_is_still_alive(csp->server_connection.sfd)
4429 && connection_destination_matches(&csp->server_connection, http, fwd))
4431 log_error(LOG_LEVEL_CONNECT,
4432 "Reusing server socket %d connected to %s. Total requests: %u.",
4433 csp->server_connection.sfd, csp->server_connection.host,
4434 csp->server_connection.requests_sent_total);
4438 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
4440 #ifdef FEATURE_CONNECTION_SHARING
4441 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING
4442 #ifdef FEATURE_HTTPS_INSPECTION
4443 && !server_use_ssl(csp)
4447 remember_connection(&csp->server_connection);
4450 #endif /* def FEATURE_CONNECTION_SHARING */
4452 log_error(LOG_LEVEL_CONNECT,
4453 "Closing server socket %d connected to %s. Total requests: %u.",
4454 csp->server_connection.sfd, csp->server_connection.host,
4455 csp->server_connection.requests_sent_total);
4456 close_socket(csp->server_connection.sfd);
4458 mark_connection_closed(&csp->server_connection);
4460 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4463 * Connecting to destination server
4465 csp->server_connection.sfd = forwarded_connect(fwd, http, csp);
4467 if (csp->server_connection.sfd == JB_INVALID_SOCKET)
4469 if (fwd->type != SOCKS_NONE)
4472 rsp = error_response(csp, "forwarding-failed");
4474 else if (errno == EINVAL)
4476 rsp = error_response(csp, "no-such-domain");
4480 rsp = error_response(csp, "connect-failed");
4483 /* Write the answer to the client */
4486 send_crunch_response(csp, rsp);
4490 * Temporary workaround to prevent already-read client
4491 * bodies from being parsed as new requests. For now we
4492 * err on the safe side and throw all the following
4493 * requests under the bus, even if no client body has been
4494 * buffered. A compliant client will repeat the dropped
4495 * requests on an untainted connection.
4497 * The proper fix is to discard the no longer needed
4498 * client body in the buffer (if there is one) and to
4499 * continue parsing the bytes that follow.
4501 #ifdef FEATURE_HTTPS_INSPECTION
4502 close_client_ssl_connection(csp);
4504 drain_and_close_socket(csp->cfd);
4505 csp->cfd = JB_INVALID_SOCKET;
4510 #ifdef FEATURE_HTTPS_INSPECTION
4512 * Creating TLS/SSL connections with destination server or parent
4513 * proxy. If forwarding is enabled, we must send client request to
4514 * parent proxy and receive, parse and resend parent proxy answer.
4516 if (http->ssl && !use_ssl_tunnel)
4518 if (fwd->forward_host != NULL)
4520 char server_response[BUFFER_SIZE];
4523 char *hdr = list_to_text(csp->headers);
4524 memset(server_response, 0, sizeof(server_response));
4528 log_error(LOG_LEVEL_FATAL,
4529 "Out of memory parsing client header");
4531 list_remove_all(csp->headers);
4534 * Sending client's CONNECT request to the parent proxy
4536 ret = write_socket(csp->server_connection.sfd, hdr, strlen(hdr));
4542 log_error(LOG_LEVEL_CONNECT,
4543 "Sending request headers to: %s failed", http->hostport);
4544 mark_server_socket_tainted(csp);
4545 close_client_ssl_connection(csp);
4549 /* Waiting for parent proxy server response */
4550 len = read_socket(csp->server_connection.sfd, server_response,
4551 sizeof(server_response)-1);
4555 log_error(LOG_LEVEL_ERROR, "No response from parent proxy "
4556 "server on socket %d.", csp->server_connection.sfd);
4558 rsp = error_response(csp, "no-server-data");
4561 send_crunch_response(csp, rsp);
4563 mark_server_socket_tainted(csp);
4564 close_client_ssl_connection(csp);
4569 * Test if the connection to the destination server was
4570 * established successfully by the parent proxy.
4572 if (!tunnel_established_successfully(server_response, (unsigned int)len))
4574 log_error(LOG_LEVEL_ERROR,
4575 "The forwarder %s failed to establish a connection with %s",
4576 fwd->forward_host, http->host);
4577 rsp = error_response(csp, "connect-failed");
4580 send_crunch_response(csp, rsp);
4582 mark_server_socket_tainted(csp);
4583 close_client_ssl_connection(csp);
4586 } /* -END- if (fwd->forward_host != NULL) */
4589 * We can now create the TLS/SSL connection with the destination server.
4591 int ret = create_server_ssl_connection(csp);
4594 if (csp->server_cert_verification_result != SSL_CERT_VALID &&
4595 csp->server_cert_verification_result != SSL_CERT_NOT_VERIFIED)
4598 * If the server certificate is invalid, we must inform
4599 * the client and then close connection to the client.
4601 ssl_send_certificate_error(csp);
4602 close_client_and_server_ssl_connections(csp);
4605 if (csp->server_cert_verification_result == SSL_CERT_NOT_VERIFIED
4606 || csp->server_cert_verification_result == SSL_CERT_VALID)
4609 * The TLS/SSL connection wasn't created but an invalid
4610 * certificate wasn't detected. Report it as connection
4613 rsp = error_response(csp, "connect-failed");
4616 send_crunch_response(csp, rsp);
4618 close_client_and_server_ssl_connections(csp);
4622 }/* -END- if (http->ssl) */
4623 #endif /* def FEATURE_HTTPS_INSPECTION */
4625 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4626 save_connection_destination(csp->server_connection.sfd,
4627 http, fwd, &csp->server_connection);
4628 csp->server_connection.keep_alive_timeout =
4629 (unsigned)csp->config->keep_alive_timeout;
4631 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4633 csp->server_connection.requests_sent_total++;
4635 if ((fwd->type == SOCKS_5T) && (NULL == csp->headers->first))
4637 /* Client headers have been sent optimistically */
4638 assert(csp->headers->last == NULL);
4640 else if (http->ssl == 0 || (fwd->forward_host
4641 #ifdef FEATURE_HTTPS_INSPECTION
4646 if (send_http_request(csp))
4648 rsp = error_response(csp, "connect-failed");
4651 send_crunch_response(csp, rsp);
4659 * Using old solution with SSL tunnel or new solution with SSL proxy
4661 list_remove_all(csp->headers);
4662 #ifdef FEATURE_HTTPS_INSPECTION
4667 * We're running an SSL tunnel and we're not forwarding,
4668 * so just ditch the client headers, send the "connect succeeded"
4669 * message to the client, flush the rest, and get out of the way.
4671 if (write_socket_delayed(csp->cfd, CSUCCEED,
4672 strlen(CSUCCEED), get_write_delay(csp)))
4677 #ifdef FEATURE_HTTPS_INSPECTION
4681 * If server certificate has been verified and is invalid,
4682 * we must inform the client and then close the connection
4683 * with client and server.
4685 if (csp->server_cert_verification_result != SSL_CERT_VALID &&
4686 csp->server_cert_verification_result != SSL_CERT_NOT_VERIFIED)
4688 ssl_send_certificate_error(csp);
4689 close_client_and_server_ssl_connections(csp);
4692 if (send_https_request(csp))
4694 rsp = error_response(csp, "connect-failed");
4697 send_crunch_response(csp, rsp);
4699 close_client_and_server_ssl_connections(csp);
4703 #endif /* def FEATURE_HTTPS_INSPECTION */
4704 clear_iob(csp->client_iob);
4705 }/* -END- else ... if (http->ssl == 1) */
4707 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
4709 /* XXX: should the time start earlier for optimistically sent data? */
4710 csp->server_connection.request_sent = time(NULL);
4712 handle_established_connection(csp);
4713 freez(csp->receive_buffer);
4718 /*********************************************************************
4720 * Function : fuzz_server_response
4722 * Description : Treat the input as a whole server response.
4725 * 1 : csp = Current client state (buffers, headers, etc...)
4726 * 2 : fuzz_input_file = File to read the input from.
4730 *********************************************************************/
4731 extern int fuzz_server_response(struct client_state *csp, char *fuzz_input_file)
4733 static struct forward_spec fwd; /* Zero'd due to being static */
4736 if (strcmp(fuzz_input_file, "-") == 0)
4738 /* XXX: Doesn't work yet. */
4739 csp->server_connection.sfd = 0;
4743 csp->server_connection.sfd = open(fuzz_input_file, O_RDONLY);
4744 if (csp->server_connection.sfd == -1)
4746 log_error(LOG_LEVEL_FATAL, "Failed to open %s: %E",
4751 csp->content_type |= CT_GIF;
4752 csp->action->flags |= ACTION_DEANIMATE;
4753 csp->action->string[ACTION_STRING_DEANIMATE] = "last";
4755 csp->http->path = strdup_or_die("/");
4756 csp->http->host = strdup_or_die("fuzz.example.org");
4757 csp->http->hostport = strdup_or_die("fuzz.example.org:80");
4758 /* Prevent client socket monitoring */
4759 csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
4760 csp->flags |= CSP_FLAG_CHUNKED;
4762 csp->config->feature_flags |= RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE;
4763 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
4765 csp->content_type |= CT_DECLARED|CT_GIF;
4767 csp->config->socket_timeout = 0;
4769 cgi_init_error_messages();
4771 handle_established_connection(csp);
4772 freez(csp->receive_buffer);
4779 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4780 /*********************************************************************
4782 * Function : prepare_csp_for_next_request
4784 * Description : Put the csp in a mostly vergin state.
4787 * 1 : csp = Current client state (buffers, headers, etc...)
4791 *********************************************************************/
4792 static void prepare_csp_for_next_request(struct client_state *csp)
4794 csp->content_type = 0;
4795 csp->content_length = 0;
4796 csp->expected_content_length = 0;
4797 csp->expected_client_content_length = 0;
4798 list_remove_all(csp->headers);
4799 clear_iob(csp->iob);
4800 freez(csp->error_message);
4801 free_http_request(csp->http);
4802 destroy_list(csp->headers);
4803 #ifdef FEATURE_HTTPS_INSPECTION
4804 destroy_list(csp->https_headers);
4806 destroy_list(csp->tags);
4807 #ifdef FEATURE_CLIENT_TAGS
4808 destroy_list(csp->client_tags);
4809 freez(csp->client_address);
4811 free_current_action(csp->action);
4812 if (NULL != csp->fwd)
4814 unload_forward_spec(csp->fwd);
4817 /* XXX: Store per-connection flags someplace else. */
4818 csp->flags = (CSP_FLAG_ACTIVE | CSP_FLAG_REUSED_CLIENT_CONNECTION);
4819 #ifdef FEATURE_TOGGLE
4820 if (global_toggle_state)
4821 #endif /* def FEATURE_TOGGLE */
4823 csp->flags |= CSP_FLAG_TOGGLED_ON;
4826 if (csp->client_iob->eod > csp->client_iob->cur)
4828 long bytes_to_shift = csp->client_iob->cur - csp->client_iob->buf;
4829 size_t data_length = (size_t)(csp->client_iob->eod - csp->client_iob->cur);
4831 assert(bytes_to_shift > 0);
4832 assert(data_length > 0);
4834 log_error(LOG_LEVEL_CONNECT, "Shifting %lu pipelined bytes by %ld bytes",
4835 data_length, bytes_to_shift);
4836 memmove(csp->client_iob->buf, csp->client_iob->cur, data_length);
4837 csp->client_iob->cur = csp->client_iob->buf;
4838 assert(csp->client_iob->eod == csp->client_iob->buf + bytes_to_shift + data_length);
4839 csp->client_iob->eod = csp->client_iob->buf + data_length;
4840 memset(csp->client_iob->eod, '\0', (size_t)bytes_to_shift);
4842 csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
4847 * We mainly care about resetting client_iob->cur so we don't
4848 * waste buffer space at the beginning and don't mess up the
4849 * request restoration done by cgi_show_request().
4851 * Freeing the buffer itself isn't technically necessary,
4852 * but makes debugging more convenient.
4854 clear_iob(csp->client_iob);
4857 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4860 /*********************************************************************
4864 * Description : This is little more than chat. We only "serve" to
4865 * to close (or remember) any socket that chat may have
4869 * 1 : csp = Current client state (buffers, headers, etc...)
4873 *********************************************************************/
4874 static void serve(struct client_state *csp)
4876 int config_file_change_detected = 0; /* Only used for debugging */
4877 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4878 #ifdef FEATURE_CONNECTION_SHARING
4879 static int monitor_thread_running = 0;
4880 #endif /* def FEATURE_CONNECTION_SHARING */
4881 int continue_chatting = 0;
4883 log_error(LOG_LEVEL_CONNECT, "Accepted connection from %s on socket %d",
4884 csp->ip_addr_str, csp->cfd);
4888 unsigned int latency;
4890 #ifdef FEATURE_HTTPS_INSPECTION
4891 if (continue_chatting && client_use_ssl(csp))
4893 continue_https_chat(csp);
4902 * If the request has been crunched,
4903 * the calculated latency is zero.
4905 latency = (unsigned)(csp->server_connection.response_received -
4906 csp->server_connection.request_sent) / 2;
4908 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
4909 && (csp->flags & CSP_FLAG_CRUNCHED)
4910 && (csp->expected_client_content_length != 0))
4912 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
4913 log_error(LOG_LEVEL_CONNECT,
4914 "Tainting client socket %d due to unread data.", csp->cfd);
4917 continue_chatting = (csp->config->feature_flags
4918 & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
4919 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
4920 && (csp->cfd != JB_INVALID_SOCKET)
4921 && (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
4922 && ((csp->flags & CSP_FLAG_SERVER_CONTENT_LENGTH_SET)
4923 || (csp->flags & CSP_FLAG_CHUNKED));
4925 if (!(csp->flags & CSP_FLAG_CRUNCHED)
4926 && (csp->server_connection.sfd != JB_INVALID_SOCKET))
4928 if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
4930 csp->server_connection.keep_alive_timeout = csp->config->default_server_timeout;
4932 if (!(csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
4933 || (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
4934 || !socket_is_still_alive(csp->server_connection.sfd)
4935 || !(latency < csp->server_connection.keep_alive_timeout))
4937 log_error(LOG_LEVEL_CONNECT,
4938 "Closing server socket %d connected to %s. "
4939 "Keep-alive: %u. Tainted: %u. Socket alive: %u. Timeout: %u.",
4940 csp->server_connection.sfd, (csp->server_connection.host != NULL) ?
4941 csp->server_connection.host : csp->http->host,
4942 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
4943 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
4944 socket_is_still_alive(csp->server_connection.sfd),
4945 csp->server_connection.keep_alive_timeout);
4946 #ifdef FEATURE_CONNECTION_SHARING
4947 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
4949 forget_connection(csp->server_connection.sfd);
4951 #endif /* def FEATURE_CONNECTION_SHARING */
4952 #ifdef FEATURE_HTTPS_INSPECTION
4953 close_server_ssl_connection(csp);
4955 close_socket(csp->server_connection.sfd);
4956 mark_connection_closed(&csp->server_connection);
4957 #ifdef FEATURE_HTTPS_INSPECTION
4958 if (continue_chatting && client_use_ssl(csp))
4961 * Close the client socket as well as Privoxy currently
4962 * can't establish a new server connection when the client
4963 * socket is reused and would drop the connection in
4964 * continue_https_chat() anyway.
4966 continue_chatting = 0;
4967 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
4968 log_error(LOG_LEVEL_CONNECT,
4969 "Client socket %d is no longer usable. "
4970 "The server socket has been closed.", csp->cfd);
4976 if (continue_chatting && any_loaded_file_changed(csp))
4978 continue_chatting = 0;
4979 config_file_change_detected = 1;
4981 #ifdef FEATURE_HTTPS_INSPECTION
4982 if (continue_chatting && client_use_ssl(csp) &&
4983 csp->ssl_with_client_is_opened == 0)
4985 continue_chatting = 0;
4986 log_error(LOG_LEVEL_CONNECT, "Client socket %d is no longer usable. "
4987 "The TLS session has been terminated.", csp->cfd);
4991 if (continue_chatting)
4993 if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) != 0)
4994 && socket_is_still_alive(csp->cfd))
4996 log_error(LOG_LEVEL_CONNECT, "Client request %d has been "
4997 "pipelined on socket %d and the socket is still alive.",
4998 csp->requests_received_total+1, csp->cfd);
4999 prepare_csp_for_next_request(csp);
5003 if (0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE))
5005 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
5007 log_error(LOG_LEVEL_CONNECT,
5008 "Waiting for the next client request on socket %d. "
5009 "Keeping the server socket %d to %s open.",
5010 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
5014 log_error(LOG_LEVEL_CONNECT,
5015 "Waiting for the next client request on socket %d. "
5016 "No server socket to keep open.", csp->cfd);
5020 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
5021 && data_is_available(csp->cfd, (int)csp->config->keep_alive_timeout)
5022 && socket_is_still_alive(csp->cfd))
5024 log_error(LOG_LEVEL_CONNECT,
5025 "Data arrived in time on client socket %d. Requests so far: %u",
5026 csp->cfd, csp->requests_received_total);
5027 prepare_csp_for_next_request(csp);
5031 #ifdef FEATURE_CONNECTION_SHARING
5032 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
5033 && (csp->server_connection.sfd != JB_INVALID_SOCKET)
5034 && (socket_is_still_alive(csp->server_connection.sfd))
5035 #ifdef FEATURE_HTTPS_INSPECTION
5036 && !server_use_ssl(csp)
5040 time_t time_open = time(NULL) - csp->server_connection.timestamp;
5042 if (csp->server_connection.keep_alive_timeout < time_open - (time_t)latency)
5047 remember_connection(&csp->server_connection);
5048 csp->server_connection.sfd = JB_INVALID_SOCKET;
5049 drain_and_close_socket(csp->cfd);
5050 csp->cfd = JB_INVALID_SOCKET;
5051 privoxy_mutex_lock(&connection_reuse_mutex);
5052 if (!monitor_thread_running)
5054 monitor_thread_running = 1;
5055 privoxy_mutex_unlock(&connection_reuse_mutex);
5056 wait_for_alive_connections();
5057 privoxy_mutex_lock(&connection_reuse_mutex);
5058 monitor_thread_running = 0;
5060 privoxy_mutex_unlock(&connection_reuse_mutex);
5062 #endif /* def FEATURE_CONNECTION_SHARING */
5066 else if (csp->server_connection.sfd != JB_INVALID_SOCKET)
5068 log_error(LOG_LEVEL_CONNECT,
5069 "Closing server socket %d connected to %s. Keep-alive: %u. "
5070 "Tainted: %u. Socket alive: %u. Timeout: %u. "
5071 "Configuration file change detected: %u",
5072 csp->server_connection.sfd, csp->server_connection.host,
5073 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
5074 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
5075 socket_is_still_alive(csp->server_connection.sfd),
5076 csp->server_connection.keep_alive_timeout,
5077 config_file_change_detected);
5079 } while (continue_chatting);
5083 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
5085 if (csp->cfd != JB_INVALID_SOCKET)
5087 log_error(LOG_LEVEL_CONNECT, "Closing client socket %d. "
5088 "Keep-alive: %u. Socket alive: %u. Data available: %u. "
5089 "Configuration file change detected: %u. Requests received: %u.",
5090 csp->cfd, 0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE),
5091 socket_is_still_alive(csp->cfd), data_is_available(csp->cfd, 0),
5092 config_file_change_detected, csp->requests_received_total);
5093 #ifdef FEATURE_HTTPS_INSPECTION
5094 close_client_ssl_connection(csp);
5096 drain_and_close_socket(csp->cfd);
5099 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
5101 #ifdef FEATURE_CONNECTION_SHARING
5102 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
5104 forget_connection(csp->server_connection.sfd);
5106 #endif /* def FEATURE_CONNECTION_SHARING */
5108 #ifdef FEATURE_HTTPS_INSPECTION
5109 close_server_ssl_connection(csp);
5110 #endif /* def FEATURE_HTTPS_INSPECTION */
5112 close_socket(csp->server_connection.sfd);
5115 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
5116 mark_connection_closed(&csp->server_connection);
5119 free_csp_resources(csp);
5121 csp->flags &= ~CSP_FLAG_ACTIVE;
5127 /*********************************************************************
5129 * Function : server_thread
5131 * Description : We only exist to call `serve' in a threaded environment.
5134 * 1 : data = Current client state (buffers, headers, etc...)
5136 * Returns : Always 0.
5138 *********************************************************************/
5139 static int32 server_thread(void *data)
5141 serve((struct client_state *) data);
5148 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
5149 /*********************************************************************
5153 * Description : Print usage info & exit.
5155 * Parameters : Pointer to argv[0] for identifying ourselves
5159 *********************************************************************/
5160 static void usage(const char *name)
5162 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
5163 "Usage: %s [--config-test] "
5166 #endif /* defined(unix) */
5169 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
5170 #endif /* defined(unix) */
5171 "[--version] [configfile]\n",
5175 show_fuzz_usage(name);
5178 printf("Aborting\n");
5183 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
5186 #ifdef MUTEX_LOCKS_AVAILABLE
5187 /*********************************************************************
5189 * Function : privoxy_mutex_lock
5191 * Description : Locks a mutex.
5194 * 1 : mutex = The mutex to lock.
5196 * Returns : Void. May exit in case of errors.
5198 *********************************************************************/
5199 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
5201 #ifdef FEATURE_PTHREAD
5202 int err = pthread_mutex_lock(mutex);
5205 if (mutex != &log_mutex)
5207 log_error(LOG_LEVEL_FATAL,
5208 "Mutex locking failed: %s.\n", strerror(err));
5213 EnterCriticalSection(mutex);
5214 #endif /* def FEATURE_PTHREAD */
5218 /*********************************************************************
5220 * Function : privoxy_mutex_unlock
5222 * Description : Unlocks a mutex.
5225 * 1 : mutex = The mutex to unlock.
5227 * Returns : Void. May exit in case of errors.
5229 *********************************************************************/
5230 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
5232 #ifdef FEATURE_PTHREAD
5233 int err = pthread_mutex_unlock(mutex);
5236 if (mutex != &log_mutex)
5238 log_error(LOG_LEVEL_FATAL,
5239 "Mutex unlocking failed: %s.\n", strerror(err));
5244 LeaveCriticalSection(mutex);
5245 #endif /* def FEATURE_PTHREAD */
5249 /*********************************************************************
5251 * Function : privoxy_mutex_init
5253 * Description : Prepares a mutex.
5256 * 1 : mutex = The mutex to initialize.
5258 * Returns : Void. May exit in case of errors.
5260 *********************************************************************/
5261 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
5263 #ifdef FEATURE_PTHREAD
5264 int err = pthread_mutex_init(mutex, 0);
5267 printf("Fatal error. Mutex initialization failed: %s.\n",
5272 InitializeCriticalSection(mutex);
5273 #endif /* def FEATURE_PTHREAD */
5275 #endif /* def MUTEX_LOCKS_AVAILABLE */
5277 /*********************************************************************
5279 * Function : initialize_mutexes
5281 * Description : Prepares mutexes if mutex support is available.
5285 * Returns : Void, exits in case of errors.
5287 *********************************************************************/
5288 static void initialize_mutexes(void)
5290 #ifdef MUTEX_LOCKS_AVAILABLE
5292 * Prepare global mutex semaphores
5295 #ifdef FEATURE_HTTPS_INSPECTION
5296 privoxy_mutex_init(&certificate_mutex);
5297 privoxy_mutex_init(&ssl_init_mutex);
5300 privoxy_mutex_init(&log_mutex);
5301 privoxy_mutex_init(&log_init_mutex);
5302 privoxy_mutex_init(&connection_reuse_mutex);
5303 #ifdef FEATURE_EXTERNAL_FILTERS
5304 privoxy_mutex_init(&external_filter_mutex);
5306 #ifdef FEATURE_CLIENT_TAGS
5307 privoxy_mutex_init(&client_tags_mutex);
5309 #ifdef FEATURE_STATISTICS
5310 privoxy_mutex_init(&block_statistics_mutex);
5312 #ifdef FEATURE_EXTENDED_STATISTICS
5313 privoxy_mutex_init(&filter_statistics_mutex);
5314 privoxy_mutex_init(&block_reason_statistics_mutex);
5318 * XXX: The assumptions below are a bit naive
5319 * and can cause locks that aren't necessary.
5321 * For example older FreeBSD versions (< 6.x?)
5322 * have no gethostbyname_r, but gethostbyname is
5325 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
5326 privoxy_mutex_init(&resolver_mutex);
5327 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
5329 * XXX: should we use a single mutex for
5330 * localtime() and gmtime() as well?
5332 #ifndef HAVE_GMTIME_R
5333 privoxy_mutex_init(&gmtime_mutex);
5334 #endif /* ndef HAVE_GMTIME_R */
5336 #ifndef HAVE_LOCALTIME_R
5337 privoxy_mutex_init(&localtime_mutex);
5338 #endif /* ndef HAVE_GMTIME_R */
5340 #if !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM)
5341 privoxy_mutex_init(&rand_mutex);
5342 #endif /* !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM) */
5344 #endif /* def MUTEX_LOCKS_AVAILABLE */
5347 /*********************************************************************
5351 * Description : Load the config file and start the listen loop.
5352 * This function is a lot more *sane* with the `load_config'
5353 * and `listen_loop' functions; although it stills does
5354 * a *little* too much for my taste.
5357 * 1 : argc = Number of parameters (including $0).
5358 * 2 : argv = Array of (char *)'s to the parameters.
5360 * Returns : 1 if : can't open config file, unrecognized directive,
5361 * stats requested in multi-thread mode, can't open the
5362 * log file, can't open the jar file, listen port is invalid,
5363 * any load fails, and can't bind port.
5365 * Else main never returns, the process must be signaled
5366 * to terminate execution. Or, on Windows, use the
5367 * "File", "Exit" menu option.
5369 *********************************************************************/
5371 int real_main(int argc, char **argv)
5373 int main(int argc, char **argv)
5377 int do_config_test = 0;
5378 #ifndef HAVE_ARC4RANDOM
5379 unsigned int random_seed;
5382 struct passwd *pw = NULL;
5383 struct group *grp = NULL;
5385 char *pre_chroot_nslookup_to_load_resolver = NULL;
5388 char *fuzz_input_type = NULL;
5389 char *fuzz_input_file = NULL;
5396 #if !defined(_WIN32)
5403 /* Prepare mutexes if supported and necessary. */
5404 initialize_mutexes();
5406 /* Enable logging until further notice. */
5410 * Parse the command line arguments
5412 * XXX: simply printing usage information in case of
5413 * invalid arguments isn't particularly user friendly.
5415 while (++argc_pos < argc)
5418 /* Check to see if the service must be installed or uninstalled */
5419 if (strncmp(argv[argc_pos], "--install", 9) == 0)
5421 const char *pName = argv[argc_pos] + 9;
5424 exit((install_service(pName)) ? 0 : 1);
5426 else if (strncmp(argv[argc_pos], "--uninstall", 11) == 0)
5428 const char *pName = argv[argc_pos] + 11;
5431 exit((uninstall_service(pName)) ? 0 : 1);
5433 else if (strcmp(argv[argc_pos], "--service") == 0)
5435 bRunAsService = TRUE;
5436 w32_set_service_cwd();
5437 atexit(w32_service_exit_notify);
5440 #endif /* defined(_WIN32) */
5443 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
5445 if (strcmp(argv[argc_pos], "--help") == 0)
5450 else if (strcmp(argv[argc_pos], "--version") == 0)
5452 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
5458 else if (strcmp(argv[argc_pos], "--no-daemon") == 0)
5460 set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
5464 else if (strcmp(argv[argc_pos], "--pidfile") == 0)
5466 if (++argc_pos == argc) usage(argv[0]);
5467 pidfile = strdup_or_die(argv[argc_pos]);
5470 else if (strcmp(argv[argc_pos], "--user") == 0)
5475 if (++argc_pos == argc) usage(argv[argc_pos]);
5477 user_arg = strdup_or_die(argv[argc_pos]);
5478 group_name = strchr(user_arg, '.');
5479 if (NULL != group_name)
5481 /* Nul-terminate the user name */
5484 /* Skip the former delimiter to actually reach the group name */
5487 grp = getgrnam(group_name);
5490 log_error(LOG_LEVEL_FATAL, "Group '%s' not found.", group_name);
5493 pw = getpwnam(user_arg);
5496 log_error(LOG_LEVEL_FATAL, "User '%s' not found.", user_arg);
5502 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup") == 0)
5504 if (++argc_pos == argc) usage(argv[0]);
5505 pre_chroot_nslookup_to_load_resolver = strdup_or_die(argv[argc_pos]);
5508 else if (strcmp(argv[argc_pos], "--chroot") == 0)
5512 #endif /* defined(unix) */
5514 else if (strcmp(argv[argc_pos], "--config-test") == 0)
5519 else if (strcmp(argv[argc_pos], "--fuzz") == 0)
5522 if (argc < argc_pos + 2) usage(argv[0]);
5523 fuzz_input_type = argv[argc_pos];
5525 fuzz_input_file = argv[argc_pos];
5527 else if (strcmp(argv[argc_pos], "--stfu") == 0)
5529 set_debug_level(LOG_LEVEL_STFU);
5532 else if (argc_pos + 1 != argc)
5535 * This is neither the last command line
5536 * option, nor was it recognized before,
5537 * therefore it must be invalid.
5543 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
5545 configfile = argv[argc_pos];
5548 } /* -END- while (more arguments) */
5550 show_version(Argv[0]);
5553 if (*configfile != '/')
5555 char cwd[BUFFER_SIZE];
5557 size_t abs_file_size;
5559 /* make config-filename absolute here */
5560 if (NULL == getcwd(cwd, sizeof(cwd)))
5562 perror("failed to get current working directory");
5566 basedir = strdup_or_die(cwd);
5568 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
5569 abs_file = malloc_or_die(abs_file_size);
5570 strlcpy(abs_file, basedir, abs_file_size);
5571 strlcat(abs_file, "/", abs_file_size);
5572 strlcat(abs_file, configfile, abs_file_size);
5573 configfile = abs_file;
5575 #endif /* defined unix */
5579 clients->next = NULL;
5581 /* XXX: factor out initialising after the next stable release. */
5586 #ifndef HAVE_ARC4RANDOM
5587 random_seed = (unsigned int)time(NULL);
5589 srandom(random_seed);
5592 #endif /* ifdef HAVE_RANDOM */
5593 #endif /* ifndef HAVE_ARC4RANDOM */
5596 * Unix signal handling
5598 * Catch the abort, interrupt and terminate signals for a graceful exit
5599 * Catch the hangup signal so the errlog can be reopened.
5601 * Ignore the broken pipe signal as connection failures
5602 * are handled when and where they occur without relying
5605 #if !defined(_WIN32)
5608 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP };
5610 for (idx = 0; idx < SZ(catched_signals); idx++)
5612 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
5613 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
5615 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
5616 #endif /* ifdef sun */
5618 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
5622 if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
5624 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for SIGPIPE: %E");
5628 #else /* ifdef _WIN32 */
5629 # ifdef _WIN_CONSOLE
5631 * We *are* in a windows console app.
5632 * Print a verbose messages about FAQ's and such
5634 printf("%s", win32_blurb);
5635 # endif /* def _WIN_CONSOLE */
5636 #endif /* def _WIN32 */
5639 if (fuzz_input_type != NULL)
5641 exit(process_fuzzed_input(fuzz_input_type, fuzz_input_file));
5643 log_error(LOG_LEVEL_FATAL,
5644 "When compiled with fuzzing support, Privoxy should only be used for fuzzing. "
5645 "Various data structures are static which is unsafe when using threads.");
5650 exit(NULL == load_config());
5653 /* Initialize the CGI subsystem */
5654 cgi_init_error_messages();
5657 * If running on unix and without the --no-daemon
5658 * option, become a daemon. I.e. fork, detach
5659 * from tty and get process group leadership
5668 if (pid < 0) /* error */
5673 else if (pid != 0) /* parent */
5678 * must check for errors
5679 * child died due to missing files aso
5682 wpid = waitpid(pid, &status, WNOHANG);
5694 * stderr (fd 2) will be closed later on,
5695 * when the config file has been parsed.
5701 * Reserve fd 0 and 1 to prevent abort() and friends
5702 * from sending stuff to the clients or servers.
5704 fd = open("/dev/null", O_RDONLY);
5707 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
5711 if (dup2(fd, 0) == -1)
5713 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 0: %E");
5717 fd = open("/dev/null", O_WRONLY);
5720 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
5724 if (dup2(fd, 1) == -1)
5726 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 1: %E");
5731 #ifdef FEATURE_EXTERNAL_FILTERS
5732 for (fd = 0; fd < 3; fd++)
5734 mark_socket_for_close_on_execute(fd);
5738 if (chdir("/") != 0)
5740 log_error(LOG_LEVEL_FATAL, "Failed to cd into '/': %E");
5743 } /* -END- if (daemon_mode) */
5746 * As soon as we have written the PID file, we can switch
5747 * to the user and group ID indicated by the --user option
5749 if (pidfile != NULL)
5751 write_pid_file(pidfile);
5755 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
5757 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
5761 if (setgroups(1, &grp->gr_gid))
5763 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
5766 else if (initgroups(pw->pw_name, pw->pw_gid))
5768 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
5774 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
5776 /* Read the time zone file from /etc before doing chroot. */
5778 if (NULL != pre_chroot_nslookup_to_load_resolver
5779 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
5781 /* Initialize resolver library. */
5782 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
5784 if (chroot(pw->pw_dir) < 0)
5786 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
5790 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
5793 if (setuid(pw->pw_uid))
5795 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
5799 char putenv_dummy[64];
5801 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
5802 if (putenv(putenv_dummy) != 0)
5804 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
5807 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
5808 if (putenv(putenv_dummy) != 0)
5810 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
5816 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
5819 #endif /* defined unix */
5822 /* This will be FALSE unless the command line specified --service
5826 /* Yup, so now we must attempt to establish a connection
5827 * with the service dispatcher. This will only work if this
5828 * process was launched by the service control manager to
5829 * actually run as a service. If this isn't the case, i've
5830 * known it take around 30 seconds or so for the call to return.
5833 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
5834 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
5836 /* Service has run, and at this point is now being stopped, so just return */
5841 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
5843 /* An error occurred. Usually it's because --service was wrongly specified
5844 * and we were unable to connect to the Service Control Dispatcher because
5845 * it wasn't expecting us and is therefore not listening.
5847 * For now, just continue below to call the listen_loop function.
5850 #endif /* def _WIN32 */
5860 /*********************************************************************
5862 * Function : bind_port_helper
5864 * Description : Bind the listen port. Handles logging, and aborts
5868 * 1 : haddr = Host address to bind to. Use NULL to bind to
5870 * 2 : hport = Specifies port to bind to.
5871 * 3 : backlog = Listen backlog.
5873 * Returns : Port that was opened.
5875 *********************************************************************/
5876 static jb_socket bind_port_helper(const char *haddr, int hport, int backlog)
5881 result = bind_port(haddr, hport, backlog, &bfd);
5885 const char *bind_address = (NULL != haddr) ? haddr : "INADDR_ANY";
5889 log_error(LOG_LEVEL_FATAL,
5890 "can't bind to %s:%d: There may be another Privoxy "
5891 "or some other proxy running on port %d",
5892 bind_address, hport, hport);
5896 log_error(LOG_LEVEL_FATAL,
5897 "can't bind to %s:%d: The hostname is not resolvable",
5898 bind_address, hport);
5902 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: %E",
5903 bind_address, hport);
5907 /* shouldn't get here */
5908 return JB_INVALID_SOCKET;
5913 if (bfd >= FD_SETSIZE)
5915 log_error(LOG_LEVEL_FATAL,
5916 "Bind socket number too high to use select(): %d >= %d",
5924 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
5929 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
5937 /*********************************************************************
5939 * Function : bind_ports_helper
5941 * Description : Bind the listen ports. Handles logging, and aborts
5945 * 1 : config = Privoxy configuration. Specifies ports
5947 * 2 : sockets = Preallocated array of opened sockets
5948 * corresponding to specification in config.
5949 * All non-opened sockets will be set to
5950 * JB_INVALID_SOCKET.
5952 * Returns : Nothing. Inspect sockets argument.
5954 *********************************************************************/
5955 static void bind_ports_helper(struct configuration_spec * config,
5956 jb_socket sockets[])
5960 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
5962 if (config->hport[i])
5964 sockets[i] = bind_port_helper(config->haddr[i],
5965 config->hport[i], config->listen_backlog);
5966 #if defined(FEATURE_ACCEPT_FILTER) && defined(SO_ACCEPTFILTER)
5967 if (config->enable_accept_filter && sockets[i] != JB_INVALID_SOCKET)
5969 struct accept_filter_arg af_options;
5970 bzero(&af_options, sizeof(af_options));
5971 strlcpy(af_options.af_name, "httpready", sizeof(af_options.af_name));
5972 if (setsockopt(sockets[i], SOL_SOCKET, SO_ACCEPTFILTER, &af_options,
5973 sizeof(af_options)))
5975 log_error(LOG_LEVEL_ERROR,
5976 "Enabling accept filter for socket %d failed: %E", sockets[i]);
5983 sockets[i] = JB_INVALID_SOCKET;
5986 config->need_bind = 0;
5990 /*********************************************************************
5992 * Function : close_ports_helper
5994 * Description : Close listenings ports.
5997 * 1 : sockets = Array of opened and non-opened sockets to
5998 * close. All sockets will be set to
5999 * JB_INVALID_SOCKET.
6001 * Returns : Nothing.
6003 *********************************************************************/
6004 static void close_ports_helper(jb_socket sockets[])
6008 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
6010 if (JB_INVALID_SOCKET != sockets[i])
6012 close_socket(sockets[i]);
6014 sockets[i] = JB_INVALID_SOCKET;
6020 /* Without this simple workaround we get this compiler warning from _beginthread
6021 * warning C4028: formal parameter 1 different from declaration
6023 void w32_service_listen_loop(void *p)
6027 #endif /* def _WIN32 */
6030 /*********************************************************************
6032 * Function : listen_loop
6034 * Description : bind the listen port and enter a "FOREVER" listening loop.
6040 *********************************************************************/
6041 static void listen_loop(void)
6043 struct client_states *csp_list = NULL;
6044 struct client_state *csp = NULL;
6045 jb_socket bfds[MAX_LISTENING_SOCKETS];
6046 struct configuration_spec *config;
6047 unsigned int active_threads = 0;
6048 #if defined(FEATURE_PTHREAD)
6049 pthread_attr_t attrs;
6051 pthread_attr_init(&attrs);
6052 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
6055 config = load_config();
6057 #ifdef FEATURE_CONNECTION_SHARING
6059 * XXX: Should be relocated once it no
6060 * longer needs to emit log messages.
6062 initialize_reusable_connections();
6063 #endif /* def FEATURE_CONNECTION_SHARING */
6065 bind_ports_helper(config, bfds);
6067 #ifdef FEATURE_GRACEFUL_TERMINATION
6068 while (!g_terminate)
6073 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__)
6074 while (waitpid(-1, NULL, WNOHANG) > 0)
6076 /* zombie children */
6078 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) */
6081 * Free data that was used by died threads
6083 active_threads = sweep();
6087 * Re-open the errlog after HUP signal
6089 if (received_hup_signal)
6091 if (NULL != config->logfile)
6093 init_error_log(Argv[0], config->logfile);
6095 received_hup_signal = 0;
6099 csp_list = zalloc_or_die(sizeof(*csp_list));
6100 csp = &csp_list->csp;
6102 log_error(LOG_LEVEL_CONNECT,
6103 "Waiting for the next client connection. Currently active threads: %u",
6107 * This config may be outdated, but for accept_connection()
6108 * it's fresh enough.
6110 csp->config = config;
6112 if (!accept_connection(csp, bfds))
6114 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
6119 csp->flags |= CSP_FLAG_ACTIVE;
6120 csp->server_connection.sfd = JB_INVALID_SOCKET;
6122 csp->config = config = load_config();
6124 if (config->need_bind)
6127 * Since we were listening to the "old port", we will not see
6128 * a "listen" param change until the next request. So, at
6129 * least 1 more request must be made for us to find the new
6130 * setting. I am simply closing the old socket and binding the
6133 * Which-ever is correct, we will serve 1 more page via the
6134 * old settings. This should probably be a "show-status"
6135 * request. This should not be a so common of an operation
6136 * that this will hurt people's feelings.
6139 close_ports_helper(bfds);
6141 bind_ports_helper(config, bfds);
6144 #ifdef FEATURE_TOGGLE
6145 if (global_toggle_state)
6146 #endif /* def FEATURE_TOGGLE */
6148 csp->flags |= CSP_FLAG_TOGGLED_ON;
6151 if (run_loader(csp))
6153 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
6154 /* Never get here - LOG_LEVEL_FATAL causes program exit */
6158 if (block_acl(NULL,csp))
6160 log_error(LOG_LEVEL_CONNECT,
6161 "Connection from %s on %s (socket %d) dropped due to ACL",
6162 csp->ip_addr_str, csp->listen_addr_str, csp->cfd);
6163 close_socket(csp->cfd);
6164 freez(csp->ip_addr_str);
6165 freez(csp->listen_addr_str);
6169 #endif /* def FEATURE_ACL */
6171 if ((0 != config->max_client_connections)
6172 && (active_threads >= config->max_client_connections))
6174 log_error(LOG_LEVEL_ERROR,
6175 "Rejecting connection from %s. Maximum number of connections reached.",
6177 write_socket_delayed(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
6178 strlen(TOO_MANY_CONNECTIONS_RESPONSE), get_write_delay(csp));
6179 close_socket(csp->cfd);
6180 freez(csp->ip_addr_str);
6181 freez(csp->listen_addr_str);
6186 /* add it to the list of clients */
6187 csp_list->next = clients->next;
6188 clients->next = csp_list;
6190 if (config->multi_threaded)
6194 /* this is a switch () statement in the C preprocessor - ugh */
6195 #undef SELECTED_ONE_OPTION
6197 /* Use Pthreads in preference to native code */
6198 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
6199 #define SELECTED_ONE_OPTION
6201 pthread_t the_thread;
6204 ret = pthread_create(&the_thread, &attrs,
6205 (void * (*)(void *))serve, csp);
6206 child_id = ret ? -1 : 0;
6210 #if defined(_WIN32) && !defined(SELECTED_ONE_OPTION)
6211 #define SELECTED_ONE_OPTION
6212 child_id = _beginthread(
6213 (void (*)(void *))serve,
6218 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
6219 #define SELECTED_ONE_OPTION
6221 thread_id tid = spawn_thread
6222 (server_thread, "server", B_NORMAL_PRIORITY, csp);
6224 if ((tid >= 0) && (resume_thread(tid) == B_OK))
6226 child_id = (int) tid;
6235 #if !defined(SELECTED_ONE_OPTION)
6238 /* This block is only needed when using fork().
6239 * When using threads, the server thread was
6240 * created and run by the call to _beginthread().
6242 if (child_id == 0) /* child */
6245 #ifdef FEATURE_TOGGLE
6246 int inherited_toggle_state = global_toggle_state;
6247 #endif /* def FEATURE_TOGGLE */
6252 * If we've been toggled or we've blocked the request, tell Mom
6255 #ifdef FEATURE_TOGGLE
6256 if (inherited_toggle_state != global_toggle_state)
6258 rc |= RC_FLAG_TOGGLED;
6260 #endif /* def FEATURE_TOGGLE */
6262 #ifdef FEATURE_STATISTICS
6263 if (csp->flags & CSP_FLAG_REJECTED)
6265 rc |= RC_FLAG_BLOCKED;
6267 #endif /* ndef FEATURE_STATISTICS */
6271 else if (child_id > 0) /* parent */
6273 /* in a fork()'d environment, the parent's
6274 * copy of the client socket and the CSP
6278 #if !defined(_WIN32) && !defined(__CYGWIN__)
6280 wait(&child_status);
6283 * Evaluate child's return code: If the child has
6284 * - been toggled, toggle ourselves
6285 * - blocked its request, bump up the stats counter
6288 #ifdef FEATURE_TOGGLE
6289 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
6291 global_toggle_state = !global_toggle_state;
6293 #endif /* def FEATURE_TOGGLE */
6295 #ifdef FEATURE_STATISTICS
6297 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
6301 #endif /* def FEATURE_STATISTICS */
6303 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
6304 close_socket(csp->cfd);
6305 csp->flags &= ~CSP_FLAG_ACTIVE;
6309 #undef SELECTED_ONE_OPTION
6310 /* end of cpp switch () */
6315 * Spawning the child failed, assume it's because
6316 * there are too many children running already.
6317 * XXX: If you assume ...
6319 log_error(LOG_LEVEL_ERROR,
6320 "Unable to take any additional connections: %E. Active threads: %u",
6322 write_socket_delayed(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
6323 strlen(TOO_MANY_CONNECTIONS_RESPONSE), get_write_delay(csp));
6324 close_socket(csp->cfd);
6325 csp->flags &= ~CSP_FLAG_ACTIVE;
6334 #if defined(FEATURE_PTHREAD)
6335 pthread_attr_destroy(&attrs);
6338 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
6340 #ifdef FEATURE_GRACEFUL_TERMINATION
6342 log_error(LOG_LEVEL_INFO, "Graceful termination requested.");
6344 close_ports_helper(bfds);
6346 unload_current_config_file();
6347 unload_current_actions_file();
6348 unload_current_re_filterfile();
6349 #ifdef FEATURE_TRUST
6350 unload_current_trust_file();
6353 if (config->multi_threaded)
6360 } while ((clients->next != NULL) && (--i > 0));
6364 log_error(LOG_LEVEL_ERROR, "Graceful termination failed "
6365 "- still some live clients after 1 minute wait.");
6375 #ifdef FEATURE_HTTPS_INSPECTION
6377 * Only release TLS backed resources if there
6378 * are no active connections left.
6380 if (clients->next == NULL)
6386 log_error(LOG_LEVEL_INFO, "Exiting gracefully.");
6388 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
6389 /* Cleanup - remove taskbar icon etc. */
6394 #endif /* FEATURE_GRACEFUL_TERMINATION */