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 #endif /* def FEATURE_STATISTICS */
132 #ifdef FEATURE_GRACEFUL_TERMINATION
137 static void sig_handler(int the_signal);
139 static int client_protocol_is_unsupported(struct client_state *csp, char *req);
140 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
141 static jb_err get_server_headers(struct client_state *csp);
142 static const char *crunch_reason(const struct http_response *rsp);
143 static void send_crunch_response(struct client_state *csp, struct http_response *rsp);
144 static char *get_request_line(struct client_state *csp);
145 static jb_err receive_client_request(struct client_state *csp);
146 static jb_err parse_client_request(struct client_state *csp);
147 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
148 static jb_err change_request_destination(struct client_state *csp);
149 static void handle_established_connection(struct client_state *csp);
150 static void chat(struct client_state *csp);
151 static void serve(struct client_state *csp);
152 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
153 static void usage(const char *myname);
155 static void initialize_mutexes(void);
156 static jb_socket bind_port_helper(const char *haddr, int hport, int backlog);
157 static void bind_ports_helper(struct configuration_spec *config, jb_socket sockets[]);
158 static void close_ports_helper(jb_socket sockets[]);
159 static void listen_loop(void);
160 static void serve(struct client_state *csp);
163 static int32 server_thread(void *data);
164 #endif /* def __BEOS__ */
167 #define sleep(N) Sleep(((N) * 1000))
171 int process_fuzzed_input(char *fuzz_input_type, char *fuzz_input_file);
172 void show_fuzz_usage(const char *name);
175 #ifdef MUTEX_LOCKS_AVAILABLE
177 * XXX: Does the locking stuff really belong in this file?
179 privoxy_mutex_t log_mutex;
180 privoxy_mutex_t log_init_mutex;
181 privoxy_mutex_t connection_reuse_mutex;
183 #ifdef FEATURE_HTTPS_INSPECTION
184 privoxy_mutex_t certificate_mutex;
185 privoxy_mutex_t ssl_init_mutex;
188 #ifdef FEATURE_EXTERNAL_FILTERS
189 privoxy_mutex_t external_filter_mutex;
191 #ifdef FEATURE_CLIENT_TAGS
192 privoxy_mutex_t client_tags_mutex;
194 #ifdef FEATURE_EXTENDED_STATISTICS
195 privoxy_mutex_t filter_statistics_mutex;
196 privoxy_mutex_t block_statistics_mutex;
199 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
200 privoxy_mutex_t resolver_mutex;
201 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
203 #ifndef HAVE_GMTIME_R
204 privoxy_mutex_t gmtime_mutex;
205 #endif /* ndef HAVE_GMTIME_R */
207 #ifndef HAVE_LOCALTIME_R
208 privoxy_mutex_t localtime_mutex;
209 #endif /* ndef HAVE_GMTIME_R */
211 #if !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM)
212 privoxy_mutex_t rand_mutex;
213 #endif /* !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM) */
215 #endif /* def MUTEX_LOCKS_AVAILABLE */
218 const char *basedir = NULL;
219 const char *pidfile = NULL;
220 static int received_hup_signal = 0;
221 #endif /* defined unix */
223 /* HTTP snipplets. */
224 static const char CSUCCEED[] =
225 "HTTP/1.1 200 Connection established\r\n\r\n";
227 static const char CHEADER[] =
228 "HTTP/1.1 400 Invalid header received from client\r\n"
229 "Content-Type: text/plain\r\n"
230 "Connection: close\r\n\r\n"
231 "Invalid header received from client.\n";
233 static const char FTP_RESPONSE[] =
234 "HTTP/1.1 400 Invalid request received from client\r\n"
235 "Content-Type: text/plain\r\n"
236 "Connection: close\r\n\r\n"
237 "Invalid request. Privoxy doesn't support FTP.\n";
239 static const char GOPHER_RESPONSE[] =
240 "HTTP/1.1 400 Invalid request received from client\r\n"
241 "Content-Type: text/plain\r\n"
242 "Connection: close\r\n\r\n"
243 "Invalid request. Privoxy doesn't support gopher.\n";
245 /* XXX: should be a template */
246 static const char MISSING_DESTINATION_RESPONSE[] =
247 "HTTP/1.1 400 Bad request received from client\r\n"
248 "Content-Type: text/plain\r\n"
249 "Connection: close\r\n\r\n"
250 "Bad request. Privoxy was unable to extract the destination.\n";
252 /* XXX: should be a template */
253 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
254 "HTTP/1.1 502 Server or forwarder response invalid\r\n"
255 "Content-Type: text/plain\r\n"
256 "Connection: close\r\n\r\n"
257 "Bad response. The server or forwarder response doesn't look like HTTP.\n";
259 /* XXX: should be a template */
260 static const char MESSED_UP_REQUEST_RESPONSE[] =
261 "HTTP/1.1 400 Malformed request after rewriting\r\n"
262 "Content-Type: text/plain\r\n"
263 "Connection: close\r\n\r\n"
264 "Bad request. Messed up with header filters.\n";
266 static const char TOO_MANY_CONNECTIONS_RESPONSE[] =
267 "HTTP/1.1 503 Too many open connections\r\n"
268 "Content-Type: text/plain\r\n"
269 "Connection: close\r\n\r\n"
270 "Maximum number of open connections reached.\n";
272 static const char CLIENT_CONNECTION_TIMEOUT_RESPONSE[] =
273 "HTTP/1.1 504 Connection timeout\r\n"
274 "Content-Type: text/plain\r\n"
275 "Connection: close\r\n\r\n"
276 "The connection timed out because the client request didn't arrive in time.\n";
278 static const char CLIENT_BODY_PARSE_ERROR_RESPONSE[] =
279 "HTTP/1.1 400 Failed reading client body\r\n"
280 "Content-Type: text/plain\r\n"
281 "Connection: close\r\n\r\n"
282 "Failed parsing or buffering the chunk-encoded client body.\n";
284 static const char UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE[] =
285 "HTTP/1.1 417 Expecting too much\r\n"
286 "Content-Type: text/plain\r\n"
287 "Connection: close\r\n\r\n"
288 "Privoxy detected an unsupported Expect header value.\n";
290 /* A function to crunch a response */
291 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
293 /* Crunch function flags */
294 #define CF_NO_FLAGS 0
295 /* Cruncher applies to forced requests as well */
296 #define CF_IGNORE_FORCE 1
297 /* Crunched requests are counted for the block statistics */
298 #define CF_COUNT_AS_REJECT 2
300 /* A crunch function and its flags */
303 const crunch_func_ptr cruncher;
307 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
309 /* Complete list of cruncher functions */
310 static const struct cruncher crunchers_all[] = {
311 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
312 { block_url, CF_COUNT_AS_REJECT },
314 { trust_url, CF_COUNT_AS_REJECT },
315 #endif /* def FEATURE_TRUST */
316 { redirect_url, CF_NO_FLAGS },
317 { dispatch_cgi, CF_IGNORE_FORCE},
321 /* Light version, used after tags are applied */
322 static const struct cruncher crunchers_light[] = {
323 { block_url, CF_COUNT_AS_REJECT },
324 { redirect_url, CF_NO_FLAGS },
330 * XXX: Don't we really mean
337 /*********************************************************************
339 * Function : sig_handler
341 * Description : Signal handler for different signals.
342 * Exit gracefully on TERM and INT
343 * or set a flag that will cause the errlog
344 * to be reopened by the main thread on HUP.
347 * 1 : the_signal = the signal cause this function to call
351 *********************************************************************/
352 static void sig_handler(int the_signal)
358 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
370 received_hup_signal = 1;
376 * We shouldn't be here, unless we catch signals
377 * in main() that we can't handle here!
379 log_error(LOG_LEVEL_FATAL,
380 "sig_handler: exiting on unexpected signal %d", the_signal);
388 /*********************************************************************
390 * Function : get_write_delay
392 * Description : Parse the delay-response parameter.
395 * 1 : csp = Current client state (buffers, headers, etc...)
397 * Returns : Number of milliseconds to delay writes.
399 *********************************************************************/
400 static unsigned int get_write_delay(const struct client_state *csp)
406 if ((csp->action->flags & ACTION_DELAY_RESPONSE) == 0)
410 newval = csp->action->string[ACTION_STRING_DELAY_RESPONSE];
412 delay = (unsigned)strtol(newval, &endptr, 0);
415 log_error(LOG_LEVEL_FATAL,
416 "Invalid delay-response{} parameter: '%s'", newval);
424 /*********************************************************************
426 * Function : client_protocol_is_unsupported
428 * Description : Checks if the client used a known unsupported
429 * protocol and deals with it by sending an error
433 * 1 : csp = Current client state (buffers, headers, etc...)
434 * 2 : req = the first request line send by the client
436 * Returns : TRUE if an error response has been generated, or
437 * FALSE if the request doesn't look invalid.
439 *********************************************************************/
440 static int client_protocol_is_unsupported(struct client_state *csp, char *req)
443 * If it's a FTP or gopher request, we don't support it.
445 * These checks are better than nothing, but they might
446 * not work in all configurations and some clients might
447 * have problems digesting the answer.
449 * They should, however, never cause more problems than
450 * Privoxy's old behaviour (returning the misleading HTML
453 * "Could not resolve http://(ftp|gopher)://example.org").
455 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
457 const char *response = NULL;
458 const char *protocol = NULL;
460 if (!strncmpic(req, "GET ftp://", 10))
462 response = FTP_RESPONSE;
467 response = GOPHER_RESPONSE;
470 log_error(LOG_LEVEL_ERROR,
471 "%s tried to use Privoxy as %s proxy: %s",
472 csp->ip_addr_str, protocol, req);
473 log_error(LOG_LEVEL_CLF,
474 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
477 #ifdef FEATURE_HTTPS_INSPECTION
478 if (client_use_ssl(csp))
480 ssl_send_data_delayed(&(csp->ssl_client_attr),
481 (const unsigned char *)response, strlen(response),
482 get_write_delay(csp));
487 write_socket_delayed(csp->cfd, response, strlen(response),
488 get_write_delay(csp));
498 /*********************************************************************
500 * Function : client_has_unsupported_expectations
502 * Description : Checks if the client used an unsupported expectation
503 * in which case an error message is delivered.
506 * 1 : csp = Current client state (buffers, headers, etc...)
508 * Returns : TRUE if an error response has been generated, or
509 * FALSE if the request doesn't look invalid.
511 *********************************************************************/
512 static int client_has_unsupported_expectations(const struct client_state *csp)
514 if ((csp->flags & CSP_FLAG_UNSUPPORTED_CLIENT_EXPECTATION))
516 log_error(LOG_LEVEL_ERROR,
517 "Rejecting request from client %s with unsupported Expect header value",
519 log_error(LOG_LEVEL_CLF,
520 "%s - - [%T] \"%s\" 417 0", csp->ip_addr_str, csp->http->cmd);
521 write_socket_delayed(csp->cfd,
522 UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE,
523 strlen(UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE),
524 get_write_delay(csp));
534 /*********************************************************************
536 * Function : get_request_destination_elsewhere
538 * Description : If the client's request was redirected into
539 * Privoxy without the client's knowledge,
540 * the request line lacks the destination host.
542 * This function tries to get it elsewhere,
543 * provided accept-intercepted-requests is enabled.
545 * "Elsewhere" currently only means "Host: header",
546 * but in the future we may ask the redirecting
547 * packet filter to look the destination up.
549 * If the destination stays unknown, an error
550 * response is send to the client and headers
551 * are freed so that chat() can return directly.
554 * 1 : csp = Current client state (buffers, headers, etc...)
555 * 2 : headers = a header list
557 * Returns : JB_ERR_OK if the destination is now known, or
558 * JB_ERR_PARSE if it isn't.
560 *********************************************************************/
561 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
563 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
565 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
566 " Privoxy isn't configured to accept intercepted requests.",
567 csp->ip_addr_str, csp->http->cmd);
568 /* XXX: Use correct size */
569 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
570 csp->ip_addr_str, csp->http->cmd);
572 write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER),
573 get_write_delay(csp));
574 destroy_list(headers);
578 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
580 /* Split the domain we just got for pattern matching */
581 init_domain_components(csp->http);
587 /* We can't work without destination. Go spread the news.*/
589 /* XXX: Use correct size */
590 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
591 csp->ip_addr_str, csp->http->cmd);
592 log_error(LOG_LEVEL_ERROR,
593 "Privoxy was unable to get the destination for %s's request: %s",
594 csp->ip_addr_str, csp->http->cmd);
596 write_socket_delayed(csp->cfd, MISSING_DESTINATION_RESPONSE,
597 strlen(MISSING_DESTINATION_RESPONSE), get_write_delay(csp));
598 destroy_list(headers);
603 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
604 * to get the destination IP address, use it as host directly
605 * or do a reverse DNS lookup first.
610 /*********************************************************************
612 * Function : get_server_headers
614 * Description : Parses server headers in iob and fills them
615 * into csp->headers so that they can later be
619 * 1 : csp = Current client state (buffers, headers, etc...)
621 * Returns : JB_ERR_OK if everything went fine, or
622 * JB_ERR_PARSE if the headers were incomplete.
624 *********************************************************************/
625 static jb_err get_server_headers(struct client_state *csp)
627 int continue_hack_in_da_house = 0;
630 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
635 * continue hack in da house. Ignore the ending of
636 * this head and continue enlisting header lines.
637 * The reason is described below.
639 enlist(csp->headers, "");
640 continue_hack_in_da_house = 0;
643 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
646 * It's a bodyless continue response, don't
647 * stop header parsing after reaching its end.
649 * As a result Privoxy will concatenate the
650 * next response's head and parse and deliver
651 * the headers as if they belonged to one request.
653 * The client will separate them because of the
654 * empty line between them.
656 * XXX: What we're doing here is clearly against
657 * the intended purpose of the continue header,
658 * and under some conditions (HTTP/1.0 client request)
659 * it's a standard violation.
661 * Anyway, "sort of against the spec" is preferable
662 * to "always getting confused by Continue responses"
663 * (Privoxy's behaviour before this hack was added)
665 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
666 continue_hack_in_da_house = 1;
668 else if (*header == '\0')
671 * If the header is empty, but the Continue hack
672 * isn't active, we can assume that we reached the
673 * end of the buffer before we hit the end of the
676 * Inform the caller an let it decide how to handle it.
681 if (JB_ERR_MEMORY == enlist(csp->headers, header))
684 * XXX: Should we quit the request and return a
685 * out of memory error page instead?
687 log_error(LOG_LEVEL_ERROR,
688 "Out of memory while enlisting server headers. %s lost.",
698 /*********************************************************************
700 * Function : crunch_reason
702 * Description : Translates the crunch reason code into a string.
705 * 1 : rsp = a http_response
707 * Returns : A string with the crunch reason or an error description.
709 *********************************************************************/
710 static const char *crunch_reason(const struct http_response *rsp)
712 char * reason = NULL;
717 return "Internal error while searching for crunch reason";
720 switch (rsp->crunch_reason)
723 reason = "Unsupported HTTP feature";
729 reason = "Untrusted";
732 reason = "Redirected";
738 reason = "DNS failure";
740 case FORWARDING_FAILED:
741 reason = "Forwarding failed";
744 reason = "Connection failure";
747 reason = "Out of memory (may mask other reasons)";
749 case CONNECTION_TIMEOUT:
750 reason = "Connection timeout";
753 reason = "No server data received";
756 reason = "No reason recorded";
764 /*********************************************************************
766 * Function : log_applied_actions
768 * Description : Logs the applied actions if LOG_LEVEL_ACTIONS is
772 * 1 : actions = Current action spec to log
776 *********************************************************************/
777 static void log_applied_actions(const struct current_action_spec *actions)
780 * The conversion to text requires lots of memory allocations so
781 * we only do the conversion if the user is actually interested.
783 if (debug_level_is_enabled(LOG_LEVEL_ACTIONS))
785 char *actions_as_text = actions_to_line_of_text(actions);
786 log_error(LOG_LEVEL_ACTIONS, "%s", actions_as_text);
787 freez(actions_as_text);
792 /*********************************************************************
794 * Function : send_crunch_response
796 * Description : Delivers already prepared response for
797 * intercepted requests, logs the interception
798 * and frees the response.
801 * 1 : csp = Current client state (buffers, headers, etc...)
802 * 2 : rsp = Fully prepared response. Will be freed on exit.
806 *********************************************************************/
807 static void send_crunch_response(struct client_state *csp, struct http_response *rsp)
809 const struct http_request *http = csp->http;
813 assert(rsp->head != NULL);
817 log_error(LOG_LEVEL_FATAL, "NULL response in send_crunch_response.");
821 * Extract the status code from the actual head
822 * that will be send to the client. It is the only
823 * way to get it right for all requests, including
824 * the fixed ones for out-of-memory problems.
826 * A head starts like this: 'HTTP/1.1 200...'
830 status_code[0] = rsp->head[9];
831 status_code[1] = rsp->head[10];
832 status_code[2] = rsp->head[11];
833 status_code[3] = '\0';
835 /* Log that the request was crunched and why. */
836 log_applied_actions(csp->action);
837 #ifdef FEATURE_HTTPS_INSPECTION
838 if (client_use_ssl(csp))
840 log_error(LOG_LEVEL_CRUNCH, "%s: https://%s%s", crunch_reason(rsp),
841 http->hostport, http->path);
842 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s https://%s%s %s\" %s %lu",
843 csp->ip_addr_str, http->gpc, http->hostport, http->path,
844 http->version, status_code, rsp->content_length);
849 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
850 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %lu",
851 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
853 /* Write the answer to the client */
854 #ifdef FEATURE_HTTPS_INSPECTION
855 if (client_use_ssl(csp))
857 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
858 (const unsigned char *)rsp->head, rsp->head_length,
859 get_write_delay(csp)) < 0)
860 || (ssl_send_data_delayed(&(csp->ssl_client_attr),
861 (const unsigned char *)rsp->body, rsp->content_length,
862 get_write_delay(csp)) < 0))
864 /* There is nothing we can do about it. */
865 log_error(LOG_LEVEL_CONNECT, "Couldn't deliver the error message "
866 "for https://%s%s through client socket %d using TLS/SSL",
867 http->hostport, http->url, csp->cfd);
873 if (write_socket_delayed(csp->cfd, rsp->head, rsp->head_length,
874 get_write_delay(csp))
875 || write_socket_delayed(csp->cfd, rsp->body, rsp->content_length,
876 get_write_delay(csp)))
878 /* There is nothing we can do about it. */
879 log_error(LOG_LEVEL_CONNECT,
880 "Couldn't deliver the error message for %s through client socket %d: %E",
881 http->url, csp->cfd);
885 /* Clean up and return */
886 if (cgi_error_memory() != rsp)
888 free_http_response(rsp);
894 /*********************************************************************
896 * Function : crunch_response_triggered
898 * Description : Checks if the request has to be crunched,
899 * and delivers the crunch response if necessary.
902 * 1 : csp = Current client state (buffers, headers, etc...)
903 * 2 : crunchers = list of cruncher functions to run
905 * Returns : TRUE if the request was answered with a crunch response
908 *********************************************************************/
909 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
911 struct http_response *rsp = NULL;
912 const struct cruncher *c;
915 * If CGI request crunching is disabled,
916 * check the CGI dispatcher out of order to
917 * prevent unintentional blocks or redirects.
919 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
920 && (NULL != (rsp = dispatch_cgi(csp))))
922 /* Deliver, log and free the interception response. */
923 send_crunch_response(csp, rsp);
924 csp->flags |= CSP_FLAG_CRUNCHED;
928 for (c = crunchers; c->cruncher != NULL; c++)
931 * Check the cruncher if either Privoxy is toggled
932 * on and the request isn't forced, or if the cruncher
933 * applies to forced requests as well.
935 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
936 !(csp->flags & CSP_FLAG_FORCED)) ||
937 (c->flags & CF_IGNORE_FORCE))
939 rsp = c->cruncher(csp);
942 /* Deliver, log and free the interception response. */
943 send_crunch_response(csp, rsp);
944 csp->flags |= CSP_FLAG_CRUNCHED;
945 #ifdef FEATURE_STATISTICS
946 if (c->flags & CF_COUNT_AS_REJECT)
948 csp->flags |= CSP_FLAG_REJECTED;
950 #endif /* def FEATURE_STATISTICS */
961 /*********************************************************************
963 * Function : build_request_line
965 * Description : Builds the HTTP request line.
967 * If a HTTP forwarder is used it expects the whole URL,
968 * web servers only get the path.
971 * 1 : csp = Current client state (buffers, headers, etc...)
972 * 2 : fwd = The forwarding spec used for the request.
974 * 3 : request_line = The old request line which will be replaced.
976 * Returns : Nothing. Terminates in case of memory problems.
978 *********************************************************************/
979 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
981 struct http_request *http = csp->http;
984 * Downgrade http version from 1.1 to 1.0
985 * if +downgrade action applies.
987 if ((csp->action->flags & ACTION_DOWNGRADE)
988 && (!strcmpic(http->version, "HTTP/1.1")))
990 freez(http->version);
991 http->version = strdup_or_die("HTTP/1.0");
995 * Rebuild the request line.
997 freez(*request_line);
998 *request_line = strdup(http->gpc);
999 string_append(request_line, " ");
1001 if (fwd != NULL && fwd->forward_host && fwd->type != FORWARD_WEBSERVER)
1003 string_append(request_line, http->url);
1007 string_append(request_line, http->path);
1009 string_append(request_line, " ");
1010 string_append(request_line, http->version);
1012 if (*request_line == NULL)
1014 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1016 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
1020 /*********************************************************************
1022 * Function : change_request_destination
1024 * Description : Parse a (rewritten) request line and regenerate
1025 * the http request data.
1028 * 1 : csp = Current client state (buffers, headers, etc...)
1030 * Returns : Forwards the parse_http_request() return code.
1031 * Terminates in case of memory problems.
1033 *********************************************************************/
1034 static jb_err change_request_destination(struct client_state *csp)
1036 struct http_request *http = csp->http;
1039 log_error(LOG_LEVEL_REDIRECTS, "Rewrite detected: %s",
1040 csp->headers->first->str);
1041 free_http_request(http);
1042 err = parse_http_request(csp->headers->first->str, http);
1043 if (JB_ERR_OK != err)
1045 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
1046 jb_err_to_string(err));
1048 if (http->ssl && strcmpic(csp->http->gpc, "CONNECT"))
1051 * A client header filter changed the request URL from
1052 * http:// to https:// which we currently don't support.
1054 log_error(LOG_LEVEL_ERROR, "Changing the request destination from http "
1055 "to https behind the client's back currently isn't supported.");
1056 return JB_ERR_PARSE;
1063 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1064 /*********************************************************************
1066 * Function : server_response_is_complete
1068 * Description : Determines whether we should stop reading
1069 * from the server socket.
1072 * 1 : csp = Current client state (buffers, headers, etc...)
1073 * 2 : content_length = Length of content received so far.
1075 * Returns : TRUE if the response is complete,
1078 *********************************************************************/
1079 static int server_response_is_complete(struct client_state *csp,
1080 unsigned long long content_length)
1082 int content_length_known = !!(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
1084 if (!strcmpic(csp->http->gpc, "HEAD"))
1087 * "HEAD" implies no body, we are thus expecting
1088 * no content. XXX: incomplete "list" of methods?
1090 csp->expected_content_length = 0;
1091 content_length_known = TRUE;
1092 csp->flags |= CSP_FLAG_SERVER_CONTENT_LENGTH_SET;
1095 if (csp->http->status == 204 || csp->http->status == 304)
1098 * Expect no body. XXX: incomplete "list" of status codes?
1100 csp->expected_content_length = 0;
1101 content_length_known = TRUE;
1102 csp->flags |= CSP_FLAG_SERVER_CONTENT_LENGTH_SET;
1105 return (content_length_known && ((0 == csp->expected_content_length)
1106 || (csp->expected_content_length <= content_length)));
1110 #ifdef FEATURE_CONNECTION_SHARING
1111 /*********************************************************************
1113 * Function : wait_for_alive_connections
1115 * Description : Waits for alive connections to timeout.
1121 *********************************************************************/
1122 static void wait_for_alive_connections(void)
1124 int connections_alive = close_unusable_connections();
1126 while (0 < connections_alive)
1128 log_error(LOG_LEVEL_CONNECT,
1129 "Waiting for %d connections to timeout.",
1132 connections_alive = close_unusable_connections();
1135 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
1138 #endif /* def FEATURE_CONNECTION_SHARING */
1141 /*********************************************************************
1143 * Function : save_connection_destination
1145 * Description : Remembers a connection for reuse later on.
1148 * 1 : sfd = Open socket to remember.
1149 * 2 : http = The destination for the connection.
1150 * 3 : fwd = The forwarder settings used.
1151 * 4 : server_connection = storage.
1155 *********************************************************************/
1156 void save_connection_destination(jb_socket sfd,
1157 const struct http_request *http,
1158 const struct forward_spec *fwd,
1159 struct reusable_connection *server_connection)
1161 assert(sfd != JB_INVALID_SOCKET);
1162 assert(NULL != http->host);
1164 server_connection->sfd = sfd;
1165 server_connection->host = strdup_or_die(http->host);
1166 server_connection->port = http->port;
1168 assert(NULL != fwd);
1169 assert(server_connection->gateway_host == NULL);
1170 assert(server_connection->gateway_port == 0);
1171 assert(server_connection->forwarder_type == 0);
1172 assert(server_connection->forward_host == NULL);
1173 assert(server_connection->forward_port == 0);
1175 server_connection->forwarder_type = fwd->type;
1176 if (NULL != fwd->gateway_host)
1178 server_connection->gateway_host = strdup_or_die(fwd->gateway_host);
1182 server_connection->gateway_host = NULL;
1184 server_connection->gateway_port = fwd->gateway_port;
1185 if (NULL != fwd->auth_username)
1187 server_connection->auth_username = strdup_or_die(fwd->auth_username);
1191 server_connection->auth_username = NULL;
1193 if (NULL != fwd->auth_password)
1195 server_connection->auth_password = strdup_or_die(fwd->auth_password);
1199 server_connection->auth_password = NULL;
1202 if (NULL != fwd->forward_host)
1204 server_connection->forward_host = strdup_or_die(fwd->forward_host);
1208 server_connection->forward_host = NULL;
1210 server_connection->forward_port = fwd->forward_port;
1212 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1215 /*********************************************************************
1217 * Function : verify_request_length
1219 * Description : Checks if we already got the whole client requests
1220 * and sets CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ if
1223 * Data that doesn't belong to the current request is
1224 * either thrown away to let the client retry on a clean
1225 * socket, or stashed to be dealt with after the current
1226 * request is served.
1229 * 1 : csp = Current client state (buffers, headers, etc...)
1233 *********************************************************************/
1234 static void verify_request_length(struct client_state *csp)
1236 unsigned long long buffered_request_bytes =
1237 (unsigned long long)(csp->client_iob->eod - csp->client_iob->cur);
1239 if ((csp->expected_client_content_length != 0)
1240 && (buffered_request_bytes != 0))
1242 if (csp->expected_client_content_length >= buffered_request_bytes)
1244 csp->expected_client_content_length -= buffered_request_bytes;
1245 log_error(LOG_LEVEL_CONNECT, "Reduced expected bytes to %llu "
1246 "to account for the %llu ones we already got.",
1247 csp->expected_client_content_length, buffered_request_bytes);
1251 assert(csp->client_iob->eod > csp->client_iob->cur + csp->expected_client_content_length);
1252 csp->client_iob->eod = csp->client_iob->cur + csp->expected_client_content_length;
1253 log_error(LOG_LEVEL_CONNECT, "Reducing expected bytes to 0. "
1254 "Marking the server socket tainted after throwing %llu bytes away.",
1255 buffered_request_bytes - csp->expected_client_content_length);
1256 csp->expected_client_content_length = 0;
1257 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1260 if (csp->expected_client_content_length == 0)
1262 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1266 if (!(csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ)
1267 && ((csp->client_iob->cur < csp->client_iob->eod)
1268 || (csp->expected_client_content_length != 0)))
1270 if (strcmpic(csp->http->gpc, "GET")
1271 && strcmpic(csp->http->gpc, "HEAD")
1272 && strcmpic(csp->http->gpc, "TRACE")
1273 && strcmpic(csp->http->gpc, "OPTIONS")
1274 && strcmpic(csp->http->gpc, "DELETE"))
1276 /* XXX: this is an incomplete hack */
1277 csp->flags &= ~CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1278 log_error(LOG_LEVEL_CONNECT, "There better be a request body.");
1282 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1284 if ((csp->config->feature_flags & RUNTIME_FEATURE_TOLERATE_PIPELINING) == 0)
1286 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1287 log_error(LOG_LEVEL_CONNECT,
1288 "Possible pipeline attempt detected. The connection will not "
1289 "be kept alive and we will only serve the first request.");
1290 /* Nuke the pipelined requests from orbit, just to be sure. */
1291 clear_iob(csp->client_iob);
1296 * Keep the pipelined data around for now, we'll deal with
1297 * it once we're done serving the current request.
1299 csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
1300 assert(csp->client_iob->eod >= csp->client_iob->cur);
1301 log_error(LOG_LEVEL_CONNECT, "Complete client request followed by "
1302 "%d bytes of pipelined data received.",
1303 (int)(csp->client_iob->eod - csp->client_iob->cur));
1309 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1310 log_error(LOG_LEVEL_CONNECT, "Complete client request received.");
1315 /*********************************************************************
1317 * Function : mark_server_socket_tainted
1319 * Description : Makes sure we don't reuse a server socket
1320 * (if we didn't read everything the server sent
1321 * us reusing the socket would lead to garbage).
1324 * 1 : csp = Current client state (buffers, headers, etc...)
1328 *********************************************************************/
1329 static void mark_server_socket_tainted(struct client_state *csp)
1332 * For consistency we always mark the server socket
1333 * tainted, however, to reduce the log noise we only
1334 * emit a log message if the server socket could have
1335 * actually been reused.
1337 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
1338 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED))
1340 log_error(LOG_LEVEL_CONNECT,
1341 "Marking the server socket %d tainted.",
1342 csp->server_connection.sfd);
1344 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1347 /*********************************************************************
1349 * Function : get_request_line
1351 * Description : Read the client request line.
1354 * 1 : csp = Current client state (buffers, headers, etc...)
1356 * Returns : Pointer to request line or NULL in case of errors.
1358 *********************************************************************/
1359 static char *get_request_line(struct client_state *csp)
1361 char buf[BUFFER_SIZE];
1362 char *request_line = NULL;
1365 memset(buf, 0, sizeof(buf));
1367 if ((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) != 0)
1370 * If there are multiple pipelined requests waiting,
1371 * the flag will be set again once the next request
1374 csp->flags &= ~CSP_FLAG_PIPELINED_REQUEST_WAITING;
1376 request_line = get_header(csp->client_iob);
1377 if ((NULL != request_line) && ('\0' != *request_line))
1379 return request_line;
1383 log_error(LOG_LEVEL_CONNECT, "No complete request line "
1384 "received yet. Continuing reading from %d.", csp->cfd);
1392 0 == (csp->flags & CSP_FLAG_FUZZED_INPUT) &&
1394 !data_is_available(csp->cfd, csp->config->socket_timeout)
1397 if (socket_is_still_alive(csp->cfd))
1399 log_error(LOG_LEVEL_CONNECT,
1400 "No request line on socket %d received in time. Timeout: %d.",
1401 csp->cfd, csp->config->socket_timeout);
1402 write_socket_delayed(csp->cfd, CLIENT_CONNECTION_TIMEOUT_RESPONSE,
1403 strlen(CLIENT_CONNECTION_TIMEOUT_RESPONSE),
1404 get_write_delay(csp));
1408 log_error(LOG_LEVEL_CONNECT,
1409 "The client side of the connection on socket %d got "
1410 "closed without sending a complete request line.", csp->cfd);
1415 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1417 if (len <= 0) return NULL;
1420 * If there is no memory left for buffering the
1421 * request, there is nothing we can do but hang up
1423 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
1428 request_line = get_header(csp->client_iob);
1430 } while ((NULL != request_line) && ('\0' == *request_line));
1432 return request_line;
1438 CHUNK_STATUS_MISSING_DATA,
1439 CHUNK_STATUS_BODY_COMPLETE,
1440 CHUNK_STATUS_PARSE_ERROR
1444 /*********************************************************************
1446 * Function : chunked_body_is_complete
1448 * Description : Figures out whether or not a chunked body is complete.
1450 * Currently it always starts at the beginning of the
1451 * buffer which is somewhat wasteful and prevents Privoxy
1452 * from starting to forward the correctly parsed chunks
1453 * as soon as theoretically possible.
1455 * Should be modified to work with a common buffer,
1456 * and allow the caller to skip already parsed chunks.
1458 * This would allow the function to be used for unbuffered
1459 * response bodies as well.
1462 * 1 : iob = Buffer with the body to check.
1463 * 2 : length = Length of complete body
1465 * Returns : Enum with the result of the check.
1467 *********************************************************************/
1468 static enum chunk_status chunked_body_is_complete(struct iob *iob, size_t *length)
1470 unsigned int chunksize;
1476 * We need at least a single digit, followed by "\r\n",
1477 * followed by an unknown amount of data, followed by "\r\n".
1479 if (p + 5 > iob->eod)
1481 return CHUNK_STATUS_MISSING_DATA;
1483 if (sscanf(p, "%x", &chunksize) != 1)
1485 return CHUNK_STATUS_PARSE_ERROR;
1489 * We want at least a single digit, followed by "\r\n",
1490 * followed by the specified amount of data, followed by "\r\n".
1492 if (p + chunksize + 5 > iob->eod)
1494 return CHUNK_STATUS_MISSING_DATA;
1497 /* Skip chunk-size. */
1498 p = strstr(p, "\r\n");
1501 return CHUNK_STATUS_PARSE_ERROR;
1503 /* Move beyond the chunkdata. */
1506 /* There should be another "\r\n" to skip */
1507 if (memcmp(p, "\r\n", 2))
1509 return CHUNK_STATUS_PARSE_ERROR;
1512 } while (chunksize > 0U);
1514 *length = (size_t)(p - iob->cur);
1515 assert(*length <= (size_t)(iob->eod - iob->cur));
1516 assert(p <= iob->eod);
1518 return CHUNK_STATUS_BODY_COMPLETE;
1523 /*********************************************************************
1525 * Function : receive_chunked_client_request_body
1527 * Description : Read the chunk-encoded client request body.
1528 * Failures are dealt with.
1531 * 1 : csp = Current client state (buffers, headers, etc...)
1533 * Returns : JB_ERR_OK or JB_ERR_PARSE
1535 *********************************************************************/
1536 static jb_err receive_chunked_client_request_body(struct client_state *csp)
1539 enum chunk_status status;
1541 while (CHUNK_STATUS_MISSING_DATA ==
1542 (status = chunked_body_is_complete(csp->client_iob, &body_length)))
1544 char buf[BUFFER_SIZE];
1547 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1549 log_error(LOG_LEVEL_ERROR,
1550 "Timeout while waiting for the client body.");
1553 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1556 log_error(LOG_LEVEL_ERROR,
1557 "Reading the client body failed: %E");
1560 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
1565 if (status != CHUNK_STATUS_BODY_COMPLETE)
1567 write_socket_delayed(csp->cfd, CLIENT_BODY_PARSE_ERROR_RESPONSE,
1568 strlen(CLIENT_BODY_PARSE_ERROR_RESPONSE), get_write_delay(csp));
1569 log_error(LOG_LEVEL_CLF,
1570 "%s - - [%T] \"Failed reading chunked client body\" 400 0", csp->ip_addr_str);
1571 return JB_ERR_PARSE;
1573 log_error(LOG_LEVEL_CONNECT,
1574 "Chunked client body completely read. Length: %lu", body_length);
1575 csp->expected_client_content_length = body_length;
1583 /*********************************************************************
1585 * Function : fuzz_chunked_transfer_encoding
1587 * Description : Treat the fuzzed input as chunked transfer encoding
1588 * to check and dechunk.
1591 * 1 : csp = Used to store the data.
1592 * 2 : fuzz_input_file = File to read the input from.
1594 * Returns : Result of dechunking
1596 *********************************************************************/
1597 extern int fuzz_chunked_transfer_encoding(struct client_state *csp, char *fuzz_input_file)
1600 size_t size = (size_t)(csp->iob->eod - csp->iob->cur);
1601 enum chunk_status status;
1603 status = chunked_body_is_complete(csp->iob, &length);
1604 if (CHUNK_STATUS_BODY_COMPLETE != status)
1606 log_error(LOG_LEVEL_INFO, "Chunked body is incomplete or invalid");
1609 return (JB_ERR_OK == remove_chunked_transfer_coding(csp->iob->cur, &size));
1614 /*********************************************************************
1616 * Function : fuzz_client_request
1618 * Description : Try to get a client request from the fuzzed input.
1621 * 1 : csp = Current client state (buffers, headers, etc...)
1622 * 2 : fuzz_input_file = File to read the input from.
1624 * Returns : Result of fuzzing.
1626 *********************************************************************/
1627 extern int fuzz_client_request(struct client_state *csp, char *fuzz_input_file)
1632 csp->ip_addr_str = "fuzzer";
1634 if (strcmp(fuzz_input_file, "-") != 0)
1636 log_error(LOG_LEVEL_FATAL,
1637 "Fuzzed client requests can currently only be read from stdin (-).");
1639 err = receive_client_request(csp);
1640 if (err != JB_ERR_OK)
1644 err = parse_client_request(csp);
1645 if (err != JB_ERR_OK)
1653 #endif /* def FUZZ */
1656 #ifdef FEATURE_FORCE_LOAD
1657 /*********************************************************************
1659 * Function : force_required
1661 * Description : Checks a request line to see if it contains
1662 * the FORCE_PREFIX. If it does, it is removed
1663 * unless enforcing requests has beend disabled.
1666 * 1 : request_line = HTTP request line
1668 * Returns : TRUE if force is required, FALSE otherwise.
1670 *********************************************************************/
1671 static int force_required(const struct client_state *csp, char *request_line)
1675 p = strstr(request_line, "http://");
1679 p += strlen("http://");
1683 /* Intercepted request usually don't specify the protocol. */
1687 /* Go to the beginning of the path */
1692 * If the path is missing the request line is invalid and we
1693 * are done here. The client-visible rejection happens later on.
1698 if (0 == strncmpic(p, FORCE_PREFIX, strlen(FORCE_PREFIX) - 1))
1700 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS))
1702 /* XXX: Should clean more carefully */
1703 strclean(request_line, FORCE_PREFIX);
1704 log_error(LOG_LEVEL_FORCE,
1705 "Enforcing request: \"%s\".", request_line);
1709 log_error(LOG_LEVEL_FORCE,
1710 "Ignored force prefix in request: \"%s\".", request_line);
1716 #endif /* def FEATURE_FORCE_LOAD */
1719 /*********************************************************************
1721 * Function : receive_client_request
1723 * Description : Read the client's request (more precisely the
1724 * client headers) and answer it if necessary.
1727 * 1 : csp = Current client state (buffers, headers, etc...)
1729 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
1731 *********************************************************************/
1732 static jb_err receive_client_request(struct client_state *csp)
1734 char buf[BUFFER_SIZE];
1737 struct http_request *http;
1741 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1742 struct list header_list;
1743 struct list *headers = &header_list;
1745 /* We don't care if the arriving data is a valid HTTP request or not. */
1746 csp->requests_received_total++;
1750 memset(buf, 0, sizeof(buf));
1752 req = get_request_line(csp);
1755 mark_server_socket_tainted(csp);
1756 return JB_ERR_PARSE;
1758 assert(*req != '\0');
1760 if (client_protocol_is_unsupported(csp, req))
1762 return JB_ERR_PARSE;
1765 #ifdef FEATURE_FORCE_LOAD
1766 if (force_required(csp, req))
1768 csp->flags |= CSP_FLAG_FORCED;
1770 #endif /* def FEATURE_FORCE_LOAD */
1772 err = parse_http_request(req, http);
1774 if (JB_ERR_OK != err)
1776 write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER),
1777 get_write_delay(csp));
1778 /* XXX: Use correct size */
1779 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1780 log_error(LOG_LEVEL_ERROR,
1781 "Couldn't parse request line received from %s: %s",
1782 csp->ip_addr_str, jb_err_to_string(err));
1784 free_http_request(http);
1785 return JB_ERR_PARSE;
1788 /* grab the rest of the client's headers */
1792 p = get_header(csp->client_iob);
1796 /* There are no additional headers to read. */
1803 * We didn't receive a complete header
1804 * line yet, get the rest of it.
1806 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1808 log_error(LOG_LEVEL_ERROR,
1809 "Stopped grabbing the client headers.");
1810 destroy_list(headers);
1811 return JB_ERR_PARSE;
1814 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1817 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1818 destroy_list(headers);
1819 return JB_ERR_PARSE;
1822 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
1825 * If there is no memory left for buffering the
1826 * request, there is nothing we can do but hang up
1828 destroy_list(headers);
1829 return JB_ERR_MEMORY;
1834 if (!strncmpic(p, "Transfer-Encoding:", 18))
1837 * XXX: should be called through sed()
1838 * but currently can't.
1840 client_transfer_encoding(csp, &p);
1843 * We were able to read a complete
1844 * header and can finally enlist it.
1851 if (http->host == NULL)
1854 * If we still don't know the request destination,
1855 * the request is invalid or the client uses
1856 * Privoxy without its knowledge.
1858 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1861 * Our attempts to get the request destination
1862 * elsewhere failed or Privoxy is configured
1863 * to only accept proxy requests.
1865 * An error response has already been sent
1866 * and we're done here.
1868 return JB_ERR_PARSE;
1872 #ifdef FEATURE_CLIENT_TAGS
1873 /* XXX: If the headers were enlisted sooner, passing csp would do. */
1874 set_client_address(csp, headers);
1875 get_tag_list_for_client(csp->client_tags, csp->client_address);
1879 * Determine the actions for this URL
1881 #ifdef FEATURE_TOGGLE
1882 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1884 /* Most compatible set of actions (i.e. none) */
1885 init_current_action(csp->action);
1888 #endif /* ndef FEATURE_TOGGLE */
1890 get_url_actions(csp, http);
1893 enlist(csp->headers, http->cmd);
1895 /* Append the previously read headers */
1896 err = list_append_list_unique(csp->headers, headers);
1897 destroy_list(headers);
1904 /*********************************************************************
1906 * Function : parse_client_request
1908 * Description : Parses the client's request and decides what to do
1911 * Note that since we're not using select() we could get
1912 * blocked here if a client connected, then didn't say
1916 * 1 : csp = Current client state (buffers, headers, etc...)
1918 * Returns : JB_ERR_OK or JB_ERR_PARSE
1920 *********************************************************************/
1921 static jb_err parse_client_request(struct client_state *csp)
1923 struct http_request *http = csp->http;
1926 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1927 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
1928 && (!strcmpic(csp->http->version, "HTTP/1.1"))
1929 && (csp->http->ssl == 0))
1931 /* Assume persistence until further notice */
1932 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
1934 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1936 if (csp->http->ssl == 0)
1939 * This whole block belongs to chat() but currently
1940 * has to be executed before sed().
1942 if (csp->flags & CSP_FLAG_CHUNKED_CLIENT_BODY)
1944 if (receive_chunked_client_request_body(csp) != JB_ERR_OK)
1946 return JB_ERR_PARSE;
1951 csp->expected_client_content_length = get_expected_content_length(csp->headers);
1953 verify_request_length(csp);
1955 #ifndef FEATURE_HTTPS_INSPECTION
1958 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1962 err = sed(csp, FILTER_CLIENT_HEADERS);
1963 if (JB_ERR_OK != err)
1965 log_error(LOG_LEVEL_ERROR, "Failed to parse client request from %s.",
1967 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1968 csp->ip_addr_str, csp->http->cmd);
1969 write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER), get_write_delay(csp));
1970 return JB_ERR_PARSE;
1972 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
1974 /* Check request line for rewrites. */
1975 if ((NULL == csp->headers->first->str)
1976 || (strcmp(http->cmd, csp->headers->first->str) &&
1977 (JB_ERR_OK != change_request_destination(csp))))
1980 * A header filter broke the request line - bail out.
1982 write_socket_delayed(csp->cfd, MESSED_UP_REQUEST_RESPONSE,
1983 strlen(MESSED_UP_REQUEST_RESPONSE), get_write_delay(csp));
1984 /* XXX: Use correct size */
1985 log_error(LOG_LEVEL_CLF,
1986 "%s - - [%T] \"Invalid request generated\" 400 0", csp->ip_addr_str);
1987 log_error(LOG_LEVEL_ERROR,
1988 "Invalid request line after applying header filters.");
1989 free_http_request(http);
1991 return JB_ERR_PARSE;
1994 if (client_has_unsupported_expectations(csp))
1996 return JB_ERR_PARSE;
2004 /*********************************************************************
2006 * Function : read_http_request_body
2008 * Description : Reads remaining request body from the client.
2011 * 1 : csp = Current client state (buffers, headers, etc...)
2013 * Returns : 0 on success, anything else is an error.
2015 *********************************************************************/
2016 static int read_http_request_body(struct client_state *csp)
2018 size_t to_read = csp->expected_client_content_length;
2021 assert(to_read != 0);
2023 /* check if all data has been already read */
2024 if (to_read <= (csp->client_iob->eod - csp->client_iob->cur))
2029 for (to_read -= (size_t)(csp->client_iob->eod - csp->client_iob->cur);
2030 to_read > 0 && data_is_available(csp->cfd, csp->config->socket_timeout);
2031 to_read -= (unsigned)len)
2033 char buf[BUFFER_SIZE];
2034 size_t max_bytes_to_read = to_read < sizeof(buf) ? to_read : sizeof(buf);
2036 log_error(LOG_LEVEL_CONNECT,
2037 "Waiting for up to %lu bytes of request body from the client.",
2039 len = read_socket(csp->cfd, buf, (int)max_bytes_to_read);
2042 log_error(LOG_LEVEL_CONNECT, "Failed receiving request body from %s: %E", csp->ip_addr_str);
2045 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, (char *)buf, len))
2049 assert(to_read >= len);
2054 log_error(LOG_LEVEL_CONNECT, "Not enough request body has been read: expected %llu more bytes",
2055 csp->expected_client_content_length);
2058 log_error(LOG_LEVEL_CONNECT, "The last %llu bytes of the request body have been read",
2059 csp->expected_client_content_length);
2064 /*********************************************************************
2066 * Function : update_client_headers
2068 * Description : Updates the HTTP headers from the client request.
2071 * 1 : csp = Current client state (buffers, headers, etc...)
2072 * 2 : new_content_length = new content length value to set
2074 * Returns : 0 on success, anything else is an error.
2076 *********************************************************************/
2077 static int update_client_headers(struct client_state *csp, size_t new_content_length)
2079 static const char content_length[] = "Content-Length:";
2081 struct list_entry *p;
2083 #ifndef FEATURE_HTTPS_INSPECTION
2084 for (p = csp->headers->first;
2086 for (p = csp->http->client_ssl ? csp->https_headers->first : csp->headers->first;
2088 !updated && (p != NULL); p = p->next)
2090 /* Header crunch()ed in previous run? -> ignore */
2096 /* Does the current parser handle this header? */
2097 if (0 == strncmpic(p->str, content_length, sizeof(content_length) - 1))
2099 updated = (JB_ERR_OK == header_adjust_content_length((char **)&(p->str), new_content_length));
2111 /*********************************************************************
2113 * Function : can_filter_request_body
2115 * Description : Checks if the current request body can be stored in
2116 * the client_iob without hitting buffer limit.
2119 * 1 : csp = Current client state (buffers, headers, etc...)
2121 * Returns : TRUE if the current request size do not exceed buffer limit
2124 *********************************************************************/
2125 static int can_filter_request_body(const struct client_state *csp)
2127 if (!can_add_to_iob(csp->client_iob, csp->config->buffer_limit,
2128 csp->expected_client_content_length))
2130 log_error(LOG_LEVEL_INFO,
2131 "Not filtering request body from %s: buffer limit %lu will be exceeded "
2132 "(content length %lluu)", csp->ip_addr_str, csp->config->buffer_limit,
2133 csp->expected_client_content_length);
2140 /*********************************************************************
2142 * Function : send_http_request
2144 * Description : Sends the HTTP headers from the client request
2145 * and all the body data that has already been received.
2148 * 1 : csp = Current client state (buffers, headers, etc...)
2150 * Returns : 0 on success, anything else is an error.
2152 *********************************************************************/
2153 static int send_http_request(struct client_state *csp)
2157 const char *to_send;
2159 int filter_client_body = csp->expected_client_content_length != 0 &&
2160 client_body_filters_enabled(csp->action) && can_filter_request_body(csp);
2162 if (filter_client_body)
2164 if (read_http_request_body(csp))
2168 to_send_len = csp->expected_client_content_length;
2169 to_send = execute_client_body_filters(csp, &to_send_len);
2170 if (to_send == NULL)
2172 /* just flush client_iob */
2173 filter_client_body = FALSE;
2175 else if (to_send_len != csp->expected_client_content_length &&
2176 update_client_headers(csp, to_send_len))
2178 log_error(LOG_LEVEL_HEADER, "Error updating client headers");
2181 csp->expected_client_content_length = 0;
2184 hdr = list_to_text(csp->headers);
2187 /* FIXME Should handle error properly */
2188 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2190 list_remove_all(csp->headers);
2193 * Write the client's (modified) header to the server
2194 * (along with anything else that may be in the buffer)
2196 write_failure = 0 != write_socket(csp->server_connection.sfd, hdr, strlen(hdr));
2201 log_error(LOG_LEVEL_CONNECT, "Failed sending request headers to: %s: %E",
2202 csp->http->hostport);
2206 if (filter_client_body)
2208 write_failure = 0 != write_socket(csp->server_connection.sfd, to_send, to_send_len);
2212 log_error(LOG_LEVEL_CONNECT, "Failed sending filtered request body to: %s: %E",
2213 csp->http->hostport);
2218 if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) == 0)
2219 && (flush_iob(csp->server_connection.sfd, csp->client_iob, 0) < 0))
2221 log_error(LOG_LEVEL_CONNECT, "Failed sending request body to: %s: %E",
2222 csp->http->hostport);
2229 #ifdef FEATURE_HTTPS_INSPECTION
2230 /*********************************************************************
2232 * Function : read_https_request_body
2234 * Description : Reads remaining request body from the client.
2237 * 1 : csp = Current client state (buffers, headers, etc...)
2239 * Returns : 0 on success, anything else is an error.
2241 *********************************************************************/
2242 static int read_https_request_body(struct client_state *csp)
2244 size_t to_read = csp->expected_client_content_length;
2247 assert(to_read != 0);
2249 /* check if all data has been already read */
2250 if (to_read <= (csp->client_iob->eod - csp->client_iob->cur))
2255 for (to_read -= (size_t)(csp->client_iob->eod - csp->client_iob->cur);
2256 to_read > 0 && (is_ssl_pending(&(csp->ssl_client_attr)) ||
2257 data_is_available(csp->cfd, csp->config->socket_timeout));
2258 to_read -= (unsigned)len)
2260 unsigned char buf[BUFFER_SIZE];
2261 size_t max_bytes_to_read = to_read < sizeof(buf) ? to_read : sizeof(buf);
2263 log_error(LOG_LEVEL_CONNECT,
2264 "Waiting for up to %lu bytes of request body from the client.",
2266 len = ssl_recv_data(&(csp->ssl_client_attr), buf,
2267 (unsigned)max_bytes_to_read);
2270 log_error(LOG_LEVEL_CONNECT, "Failed receiving request body from %s", csp->ip_addr_str);
2273 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, (char *)buf, len))
2277 assert(to_read >= len);
2282 log_error(LOG_LEVEL_CONNECT,
2283 "Not enough request body has been read: expected %lu more bytes",
2288 log_error(LOG_LEVEL_CONNECT,
2289 "The last %llu bytes of the request body have been read",
2290 csp->expected_client_content_length);
2295 /*********************************************************************
2297 * Function : receive_and_send_encrypted_post_data
2299 * Description : Reads remaining request body from the client and sends
2303 * 1 : csp = Current client state (buffers, headers, etc...)
2305 * Returns : 0 on success, anything else is an error.
2307 *********************************************************************/
2308 static int receive_and_send_encrypted_post_data(struct client_state *csp)
2310 int content_length_known = csp->expected_client_content_length != 0;
2312 while (is_ssl_pending(&(csp->ssl_client_attr))
2313 || (content_length_known && csp->expected_client_content_length != 0))
2315 unsigned char buf[BUFFER_SIZE];
2317 int max_bytes_to_read = sizeof(buf);
2319 if (content_length_known && csp->expected_client_content_length < sizeof(buf))
2321 max_bytes_to_read = (int)csp->expected_client_content_length;
2323 log_error(LOG_LEVEL_CONNECT,
2324 "Waiting for up to %d bytes of request body from the client.",
2326 len = ssl_recv_data(&(csp->ssl_client_attr), buf,
2327 (unsigned)max_bytes_to_read);
2334 /* XXX: Does this actually happen? */
2337 log_error(LOG_LEVEL_CONNECT, "Forwarding %d bytes of encrypted request body",
2339 len = ssl_send_data(&(csp->ssl_server_attr), buf, (size_t)len);
2344 if (csp->expected_client_content_length != 0)
2346 if (csp->expected_client_content_length >= len)
2348 csp->expected_client_content_length -= (unsigned)len;
2350 if (csp->expected_client_content_length == 0)
2352 log_error(LOG_LEVEL_CONNECT, "Forwarded the last %d bytes", len);
2358 log_error(LOG_LEVEL_CONNECT, "Done forwarding encrypted request body");
2365 /*********************************************************************
2367 * Function : send_https_request
2369 * Description : Sends the HTTP headers from the client request
2370 * and all the body data that has already been received.
2373 * 1 : csp = Current client state (buffers, headers, etc...)
2375 * Returns : 0 on success, anything else is an error.
2377 *********************************************************************/
2378 static int send_https_request(struct client_state *csp)
2383 const char *to_send;
2385 int filter_client_body = csp->expected_client_content_length != 0 &&
2386 client_body_filters_enabled(csp->action) && can_filter_request_body(csp);
2388 if (filter_client_body)
2390 if (read_https_request_body(csp))
2394 to_send_len = csp->expected_client_content_length;
2395 to_send = execute_client_body_filters(csp, &to_send_len);
2396 if (to_send == NULL)
2398 /* just flush client_iob */
2399 filter_client_body = FALSE;
2401 else if (to_send_len != csp->expected_client_content_length &&
2402 update_client_headers(csp, to_send_len))
2404 log_error(LOG_LEVEL_HEADER, "Error updating client headers");
2407 csp->expected_client_content_length = 0;
2410 hdr = list_to_text(csp->https_headers);
2413 /* FIXME Should handle error properly */
2414 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2416 list_remove_all(csp->https_headers);
2419 * Write the client's (modified) header to the server
2420 * (along with anything else that may be in the buffer)
2422 ret = ssl_send_data(&(csp->ssl_server_attr),
2423 (const unsigned char *)hdr, strlen(hdr));
2428 log_error(LOG_LEVEL_CONNECT,
2429 "Failed sending encrypted request headers to: %s: %E",
2430 csp->http->hostport);
2431 mark_server_socket_tainted(csp);
2435 if (filter_client_body)
2437 ret = ssl_send_data(&(csp->ssl_server_attr), (const unsigned char *)to_send, to_send_len);
2441 log_error(LOG_LEVEL_CONNECT, "Failed sending filtered request body to: %s",
2442 csp->http->hostport);
2447 if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) == 0)
2448 && ((flushed = ssl_flush_socket(&(csp->ssl_server_attr),
2449 csp->client_iob)) < 0))
2451 log_error(LOG_LEVEL_CONNECT, "Failed sending request body to: %s: %E",
2452 csp->http->hostport);
2455 if (flushed != 0 || csp->expected_client_content_length != 0)
2457 if (csp->expected_client_content_length != 0)
2459 if (csp->expected_client_content_length < flushed)
2461 log_error(LOG_LEVEL_ERROR,
2462 "Flushed %ld bytes of request body while only expecting %llu",
2463 flushed, csp->expected_client_content_length);
2464 csp->expected_client_content_length = 0;
2468 log_error(LOG_LEVEL_CONNECT,
2469 "Flushed %ld bytes of request body while expecting %llu",
2470 flushed, csp->expected_client_content_length);
2471 csp->expected_client_content_length -= (unsigned)flushed;
2472 if (receive_and_send_encrypted_post_data(csp))
2480 log_error(LOG_LEVEL_CONNECT,
2481 "Flushed %ld bytes of request body", flushed);
2485 log_error(LOG_LEVEL_CONNECT, "Encrypted request sent");
2492 /*********************************************************************
2494 * Function : receive_encrypted_request
2496 * Description : Receives an encrypted request.
2499 * 1 : csp = Current client state (buffers, headers, etc...)
2501 * Returns : JB_ERR_OK on success,
2502 * JB_ERR_PARSE or JB_ERR_MEMORY otherwise
2504 *********************************************************************/
2505 static jb_err receive_encrypted_request(struct client_state *csp)
2507 char buf[BUFFER_SIZE];
2513 log_error(LOG_LEVEL_HEADER, "Reading encrypted headers");
2514 if (!is_ssl_pending(&(csp->ssl_client_attr)) &&
2515 !data_is_available(csp->cfd, csp->config->socket_timeout))
2517 log_error(LOG_LEVEL_CONNECT,
2518 "Socket %d timed out while waiting for client headers", csp->cfd);
2519 return JB_ERR_PARSE;
2521 len = ssl_recv_data(&(csp->ssl_client_attr),
2522 (unsigned char *)buf, sizeof(buf));
2525 log_error(LOG_LEVEL_CONNECT,
2526 "Socket %d closed while waiting for client headers", csp->cfd);
2527 return JB_ERR_PARSE;
2531 return JB_ERR_PARSE;
2533 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
2535 return JB_ERR_MEMORY;
2537 p = strstr(csp->client_iob->cur, "\r\n\r\n");
2538 } while (p == NULL);
2540 log_error(LOG_LEVEL_HEADER, "Encrypted headers received completely");
2546 /*********************************************************************
2548 * Function : change_encrypted_request_destination
2550 * Description : Parse a (rewritten) request line from an encrypted
2551 * request and regenerate the http request data.
2554 * 1 : csp = Current client state (buffers, headers, etc...)
2556 * Returns : Forwards the parse_http_request() return code.
2557 * Terminates in case of memory problems.
2559 *********************************************************************/
2560 static jb_err change_encrypted_request_destination(struct client_state *csp)
2563 char *original_host = csp->http->host;
2564 int original_port = csp->http->port;
2566 log_error(LOG_LEVEL_REDIRECTS, "Rewrite detected: %s",
2567 csp->https_headers->first->str);
2568 csp->http->host = NULL;
2569 free_http_request(csp->http);
2570 err = parse_http_request(csp->https_headers->first->str, csp->http);
2571 if (JB_ERR_OK != err)
2573 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2574 jb_err_to_string(err));
2575 freez(original_host);
2579 if (csp->http->host == NULL)
2581 char port_string[10];
2583 * The rewritten request line did not specify a host
2584 * which means we can use the original host specified
2587 csp->http->host = original_host;
2588 csp->http->port = original_port;
2589 log_error(LOG_LEVEL_REDIRECTS, "Keeping the original host: %s",
2592 * If the rewritten request line didn't contain a host
2593 * it also didn't contain a port so we can reuse the host
2596 freez(csp->http->hostport);
2597 csp->http->hostport = strdup_or_die(csp->http->host);
2598 snprintf(port_string, sizeof(port_string), ":%d", original_port);
2599 err = string_append(&csp->http->hostport, port_string);
2600 if (err != JB_ERR_OK)
2602 log_error(LOG_LEVEL_ERROR, "Failed to rebuild hostport: %s.",
2603 jb_err_to_string(err));
2608 * While the request line didn't mention it,
2609 * we're https-inspecting and want to speak TLS
2612 csp->http->server_ssl = 1;
2617 /* The rewrite filter added a host so we can ditch the original */
2618 freez(original_host);
2619 csp->http->server_ssl = csp->http->ssl;
2622 csp->http->client_ssl = 1;
2624 freez(csp->https_headers->first->str);
2625 build_request_line(csp, NULL, &csp->https_headers->first->str);
2627 if (!server_use_ssl(csp))
2629 log_error(LOG_LEVEL_REDIRECTS,
2630 "Rewritten request line results in downgrade to http");
2632 * Replace the unencryptd headers received with the
2633 * CONNECT request with the ones we received securely.
2635 destroy_list(csp->headers);
2636 csp->headers->first = csp->https_headers->first;
2637 csp->headers->last = csp->https_headers->last;
2638 csp->https_headers->first = NULL;
2639 csp->https_headers->last = NULL;
2647 /*********************************************************************
2649 * Function : process_encrypted_request
2651 * Description : Receives and parses an encrypted request.
2654 * 1 : csp = Current client state (buffers, headers, etc...)
2656 * Returns : JB_ERR_OK on success,
2657 * JB_ERR_PARSE or JB_ERR_MEMORY otherwise
2659 *********************************************************************/
2660 static jb_err process_encrypted_request(struct client_state *csp)
2665 /* Temporary copy of the client's headers before they get enlisted in csp->https_headers */
2666 struct list header_list;
2667 struct list *headers = &header_list;
2669 assert(csp->ssl_with_client_is_opened);
2671 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2672 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
2674 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2677 err = receive_encrypted_request(csp);
2678 if (err != JB_ERR_OK)
2680 if (csp->client_iob->cur == NULL ||
2681 csp->client_iob->cur == csp->client_iob->eod)
2684 * We did not receive any data, most likely because the
2685 * client is done. Don't log this as a parse failure.
2687 return JB_ERR_PARSE;
2689 /* XXX: Also used for JB_ERR_MEMORY */
2690 log_error(LOG_LEVEL_ERROR, "Failed to receive encrypted request: %s",
2691 jb_err_to_string(err));
2692 ssl_send_data_delayed(&(csp->ssl_client_attr),
2693 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2697 /* We don't need get_request_line() because the whole HTTP head is buffered. */
2698 request_line = get_header(csp->client_iob);
2699 if (request_line == NULL)
2701 log_error(LOG_LEVEL_ERROR, "Failed to get the encrypted request line");
2702 ssl_send_data_delayed(&(csp->ssl_client_attr),
2703 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2704 return JB_ERR_PARSE;
2706 assert(*request_line != '\0');
2708 if (client_protocol_is_unsupported(csp, request_line))
2711 * If the protocol is unsupported we're done here.
2712 * client_protocol_is_unsupported() took care of sending
2713 * the error response and logging the error message.
2715 return JB_ERR_PARSE;
2718 #ifdef FEATURE_FORCE_LOAD
2719 if (force_required(csp, request_line))
2721 csp->flags |= CSP_FLAG_FORCED;
2723 #endif /* def FEATURE_FORCE_LOAD */
2725 free_http_request(csp->http);
2727 err = parse_http_request(request_line, csp->http);
2728 /* XXX: Restore ssl setting. This is ugly */
2729 csp->http->client_ssl = 1;
2730 csp->http->server_ssl = 1;
2732 freez(request_line);
2733 if (JB_ERR_OK != err)
2735 ssl_send_data_delayed(&(csp->ssl_client_attr),
2736 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2737 /* XXX: Use correct size */
2738 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2739 log_error(LOG_LEVEL_ERROR,
2740 "Couldn't parse request line received from %s: %s",
2741 csp->ip_addr_str, jb_err_to_string(err));
2743 free_http_request(csp->http);
2744 return JB_ERR_PARSE;
2747 /* Parse the rest of the client's headers. */
2751 p = get_header(csp->client_iob);
2755 /* There are no additional headers to read. */
2762 if (JB_ERR_OK != get_destination_from_https_headers(headers, csp->http))
2765 * Our attempts to get the request destination
2768 log_error(LOG_LEVEL_ERROR,
2769 "Failed to get the encrypted request destination");
2770 ssl_send_data_delayed(&(csp->ssl_client_attr),
2771 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2772 return JB_ERR_PARSE;
2775 /* Split the domain we just got for pattern matching */
2776 init_domain_components(csp->http);
2778 #ifdef FEATURE_CLIENT_TAGS
2779 /* XXX: If the headers were enlisted sooner, passing csp would do. */
2780 if (csp->client_address == NULL)
2782 set_client_address(csp, headers);
2783 get_tag_list_for_client(csp->client_tags, csp->client_address);
2787 #ifdef FEATURE_TOGGLE
2788 if ((csp->flags & CSP_FLAG_TOGGLED_ON) != 0)
2792 * Determine the actions for this request after
2793 * clearing the ones from the previous one.
2795 free_current_action(csp->action);
2796 get_url_actions(csp, csp->http);
2799 enlist(csp->https_headers, csp->http->cmd);
2801 /* Append the previously read headers */
2802 err = list_append_list_unique(csp->https_headers, headers);
2803 destroy_list(headers);
2804 if (JB_ERR_OK != err)
2806 /* XXX: Send error message */
2810 /* XXX: Work around crash */
2811 csp->error_message = NULL;
2813 /* XXX: Why do this here? */
2816 err = sed_https(csp);
2817 if (JB_ERR_OK != err)
2819 ssl_send_data_delayed(&(csp->ssl_client_attr),
2820 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2821 log_error(LOG_LEVEL_ERROR, "Failed to parse client request from %s.",
2823 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
2824 csp->ip_addr_str, csp->http->cmd);
2825 return JB_ERR_PARSE;
2828 if ((NULL == csp->https_headers->first->str)
2829 || (strcmp(csp->http->cmd, csp->https_headers->first->str) &&
2830 (JB_ERR_OK != change_encrypted_request_destination(csp))))
2832 ssl_send_data_delayed(&(csp->ssl_client_attr),
2833 (const unsigned char *)MESSED_UP_REQUEST_RESPONSE,
2834 strlen(MESSED_UP_REQUEST_RESPONSE), get_write_delay(csp));
2835 log_error(LOG_LEVEL_ERROR,
2836 "Invalid request line after applying header filters.");
2837 /* XXX: Use correct size */
2838 log_error(LOG_LEVEL_CLF,
2839 "%s - - [%T] \"Invalid request generated\" 400 0", csp->ip_addr_str);
2841 return JB_ERR_PARSE;
2844 log_error(LOG_LEVEL_HEADER, "Encrypted request processed");
2845 log_applied_actions(csp->action);
2846 log_error(LOG_LEVEL_REQUEST, "https://%s%s", csp->http->hostport,
2853 /*********************************************************************
2855 * Function : cgi_page_requested
2857 * Description : Checks if a request is for an internal CGI page.
2860 * 1 : host = The host requested by the client.
2862 * Returns : 1 if a CGI page has been requested, 0 otherwise
2864 *********************************************************************/
2865 static int cgi_page_requested(const char *host)
2867 if ((0 == strcmpic(host, CGI_SITE_1_HOST))
2868 || (0 == strcmpic(host, CGI_SITE_1_HOST "."))
2869 || (0 == strcmpic(host, CGI_SITE_2_HOST))
2870 || (0 == strcmpic(host, CGI_SITE_2_HOST ".")))
2880 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2881 /*********************************************************************
2883 * Function : continue_https_chat
2885 * Description : Behaves similar to chat() but only deals with
2886 * https-inspected requests that arrive on an already
2887 * established connection. The first request is always
2888 * served by chat() which is a lot more complex as it
2889 * has to deal with forwarding settings and connection
2892 * If a connection to the server has already been
2893 * opened it is reused unless the request is blocked
2894 * or the forwarder changed.
2896 * If a connection to the server has not yet been
2897 * opened (because the previous request was crunched),
2898 * or the forwarder changed, the connection is dropped
2899 * so that the client retries on a fresh one.
2902 * 1 : csp = Current client state (buffers, headers, etc...)
2904 * Returns : Nothing.
2906 *********************************************************************/
2907 static void continue_https_chat(struct client_state *csp)
2909 const struct forward_spec *fwd;
2911 if (JB_ERR_OK != process_encrypted_request(csp))
2913 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2917 csp->requests_received_total++;
2920 * We have an encrypted request. Check if one of the crunchers wants it.
2922 if (crunch_response_triggered(csp, crunchers_all))
2925 * Yes. The client got the crunch response and we're done here.
2929 if (csp->ssl_with_server_is_opened == 0)
2931 log_error(LOG_LEVEL_CONNECT,
2932 "Dropping the client connection on socket %d. "
2933 "The server connection has not been established yet.",
2935 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2938 assert(csp->server_connection.sfd != JB_INVALID_SOCKET);
2940 fwd = forward_url(csp, csp->http);
2941 if (!connection_destination_matches(&csp->server_connection, csp->http, fwd))
2943 log_error(LOG_LEVEL_CONNECT,
2944 "Dropping the client connection on socket %d with "
2945 "server socket %d connected to %s. The forwarder has changed.",
2946 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
2947 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2951 log_error(LOG_LEVEL_CONNECT,
2952 "Reusing server socket %d connected to %s. Requests already sent: %u.",
2953 csp->server_connection.sfd, csp->server_connection.host,
2954 csp->server_connection.requests_sent_total);
2956 if (send_https_request(csp))
2959 * Most likely the server connection timed out. We can't easily
2960 * create a new one so simply drop the client connection without a
2961 * error response to let the client retry.
2963 log_error(LOG_LEVEL_CONNECT,
2964 "Dropping client connection on socket %d. "
2965 "Forwarding the encrypted client request failed.",
2969 csp->server_connection.requests_sent_total++;
2970 handle_established_connection(csp);
2971 freez(csp->receive_buffer);
2973 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2977 /*********************************************************************
2979 * Function : handle_established_connection
2981 * Description : Shuffle data between client and server once the
2982 * connection has been established.
2985 * 1 : csp = Current client state (buffers, headers, etc...)
2987 * Returns : Nothing.
2989 *********************************************************************/
2990 static void handle_established_connection(struct client_state *csp)
2996 struct pollfd poll_fds[2];
3000 struct timeval timeout;
3003 int ms_iis5_hack = 0;
3004 unsigned long long byte_count = 0;
3005 struct http_request *http;
3006 long len = 0; /* for buffer sizes (and negative error codes) */
3007 int buffer_and_filter_content = 0;
3008 unsigned int write_delay;
3009 #ifdef FEATURE_HTTPS_INSPECTION
3011 int use_ssl_tunnel = 0;
3012 csp->dont_verify_certificate = 0;
3014 if (csp->http->ssl && !(csp->action->flags & ACTION_HTTPS_INSPECTION))
3016 /* Pass encrypted content without filtering. */
3021 /* Skeleton for HTTP response, if we should intercept the request */
3022 struct http_response *rsp;
3023 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3024 int watch_client_socket;
3027 csp->receive_buffer_size = csp->config->receive_buffer_size;
3028 csp->receive_buffer = zalloc(csp->receive_buffer_size + 1);
3029 if (csp->receive_buffer == NULL)
3031 log_error(LOG_LEVEL_ERROR,
3032 "Out of memory. Failed to allocate the receive buffer.");
3033 rsp = cgi_error_memory();
3034 send_crunch_response(csp, rsp);
3041 maxfd = (csp->cfd > csp->server_connection.sfd) ?
3042 csp->cfd : csp->server_connection.sfd;
3045 /* pass data between the client and server
3046 * until one or the other shuts down the connection.
3051 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3052 watch_client_socket = 0 == (csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING);
3054 write_delay = get_write_delay(csp);
3060 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3061 if (!watch_client_socket)
3063 maxfd = csp->server_connection.sfd;
3066 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3068 FD_SET(csp->cfd, &rfds);
3071 FD_SET(csp->server_connection.sfd, &rfds);
3072 #endif /* ndef HAVE_POLL */
3074 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3075 if ((csp->flags & CSP_FLAG_CHUNKED)
3076 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3077 && ((csp->iob->eod - csp->iob->cur) >= 5)
3078 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
3081 * XXX: This check should be obsolete now,
3082 * but let's wait a while to be sure.
3084 log_error(LOG_LEVEL_CONNECT,
3085 "Looks like we got the last chunk together with "
3086 "the server headers but didn't detect it earlier. "
3087 "We better stop reading.");
3088 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
3089 csp->expected_content_length = byte_count;
3090 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
3092 if (server_body && server_response_is_complete(csp, byte_count))
3094 if (csp->expected_content_length == byte_count)
3096 log_error(LOG_LEVEL_CONNECT,
3097 "Done reading from server. Content length: %llu as expected. "
3098 "Bytes most recently read: %ld.",
3103 log_error(LOG_LEVEL_CONNECT,
3104 "Done reading from server. Expected content length: %llu. "
3105 "Actual content length: %llu. Bytes most recently read: %ld.",
3106 csp->expected_content_length, byte_count, len);
3110 * XXX: Should not jump around, handle_established_connection()
3111 * is complicated enough already.
3115 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
3118 poll_fds[0].fd = csp->cfd;
3119 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3120 if (!watch_client_socket)
3123 * Ignore incoming data, but still watch out
3124 * for disconnects etc. These flags are always
3125 * implied anyway but explicitly setting them
3128 poll_fds[0].events = POLLERR|POLLHUP;
3133 poll_fds[0].events = POLLIN;
3135 poll_fds[1].fd = csp->server_connection.sfd;
3136 poll_fds[1].events = POLLIN;
3137 n = poll(poll_fds, 2, csp->config->socket_timeout * 1000);
3139 timeout.tv_sec = csp->config->socket_timeout;
3140 timeout.tv_usec = 0;
3141 n = select((int)maxfd + 1, &rfds, NULL, NULL, &timeout);
3142 #endif /* def HAVE_POLL */
3144 /*server or client not responding in timeout */
3147 log_error(LOG_LEVEL_CONNECT, "Socket timeout %d reached: %s",
3148 csp->config->socket_timeout, http->url);
3149 if ((byte_count == 0) && (http->ssl == 0))
3151 send_crunch_response(csp, error_response(csp, "connection-timeout"));
3153 mark_server_socket_tainted(csp);
3154 #ifdef FEATURE_HTTPS_INSPECTION
3155 close_client_and_server_ssl_connections(csp);
3162 log_error(LOG_LEVEL_ERROR, "poll() failed!: %E");
3164 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
3166 mark_server_socket_tainted(csp);
3167 #ifdef FEATURE_HTTPS_INSPECTION
3168 close_client_and_server_ssl_connections(csp);
3174 * This is the body of the browser's request,
3175 * just read and write it.
3177 * Receives data from browser and sends it to server
3179 * XXX: Make sure the client doesn't use pipelining
3180 * behind Privoxy's back.
3183 if ((poll_fds[0].revents & (POLLERR|POLLHUP|POLLNVAL)) != 0)
3185 log_error(LOG_LEVEL_CONNECT,
3186 "The client socket %d has become unusable while "
3187 "the server socket %d is still open.",
3188 csp->cfd, csp->server_connection.sfd);
3189 mark_server_socket_tainted(csp);
3193 if (poll_fds[0].revents != 0)
3195 if (FD_ISSET(csp->cfd, &rfds))
3196 #endif /* def HAVE_POLL*/
3198 int max_bytes_to_read = (int)csp->receive_buffer_size;
3200 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3201 if ((csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
3203 if (data_is_available(csp->cfd, 0))
3206 * If the next request is already waiting, we have
3207 * to stop select()ing the client socket. Otherwise
3208 * we would always return right away and get nothing
3211 watch_client_socket = 0;
3212 log_error(LOG_LEVEL_CONNECT,
3213 "Stop watching client socket %d. "
3214 "There's already another request waiting.",
3219 * If the client socket is set, but there's no data
3220 * available on the socket, the client went fishing
3221 * and continuing talking to the server makes no sense.
3223 log_error(LOG_LEVEL_CONNECT,
3224 "The client closed socket %d while "
3225 "the server socket %d is still open.",
3226 csp->cfd, csp->server_connection.sfd);
3227 mark_server_socket_tainted(csp);
3230 if (csp->expected_client_content_length != 0)
3232 if (csp->expected_client_content_length < csp->receive_buffer_size)
3234 max_bytes_to_read = (int)csp->expected_client_content_length;
3236 log_error(LOG_LEVEL_CONNECT,
3237 "Waiting for up to %d bytes from the client.",
3240 assert(max_bytes_to_read <= csp->receive_buffer_size);
3241 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3243 #ifdef FEATURE_HTTPS_INSPECTION
3244 if (client_use_ssl(csp))
3246 if (csp->http->status == 101)
3248 len = ssl_recv_data(&(csp->ssl_client_attr),
3249 (unsigned char *)csp->receive_buffer,
3250 (size_t)max_bytes_to_read);
3253 log_error(LOG_LEVEL_ERROR, "Failed to receive data "
3254 "on client socket %d for an upgraded connection",
3260 log_error(LOG_LEVEL_CONNECT, "Done receiving data "
3261 "on client socket %d for an upgraded connection",
3265 byte_count += (unsigned long long)len;
3266 len = ssl_send_data(&(csp->ssl_server_attr),
3267 (unsigned char *)csp->receive_buffer, (size_t)len);
3270 log_error(LOG_LEVEL_ERROR, "Failed to send data "
3271 "on server socket %d for an upgraded connection",
3272 csp->server_connection.sfd);
3277 log_error(LOG_LEVEL_CONNECT, "Breaking with TLS/SSL.");
3281 #endif /* def FEATURE_HTTPS_INSPECTION */
3283 len = read_socket(csp->cfd, csp->receive_buffer, max_bytes_to_read);
3287 /* XXX: not sure if this is necessary. */
3288 mark_server_socket_tainted(csp);
3289 break; /* "game over, man" */
3292 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3293 if (csp->expected_client_content_length != 0)
3295 assert(len <= max_bytes_to_read);
3296 csp->expected_client_content_length -= (unsigned)len;
3297 log_error(LOG_LEVEL_CONNECT,
3298 "Expected client content length set to %llu "
3299 "after reading %ld bytes.",
3300 csp->expected_client_content_length, len);
3301 if (csp->expected_client_content_length == 0)
3303 log_error(LOG_LEVEL_CONNECT,
3304 "Done reading from the client.");
3305 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
3308 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3310 if (write_socket(csp->server_connection.sfd, csp->receive_buffer, (size_t)len))
3312 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
3313 mark_server_socket_tainted(csp);
3321 * The server wants to talk. It could be the header or the body.
3322 * If `hdr' is null, then it's the header otherwise it's the body.
3323 * FIXME: Does `hdr' really mean `host'? No.
3326 if (poll_fds[1].revents != 0)
3328 if (FD_ISSET(csp->server_connection.sfd, &rfds))
3329 #endif /* HAVE_POLL */
3331 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3333 * If we are buffering content, we don't want to eat up to
3334 * buffer-limit bytes if the client no longer cares about them.
3335 * If we aren't buffering, however, a dead client socket will be
3336 * noticed pretty much right away anyway, so we can reduce the
3337 * overhead by skipping the check.
3339 if (buffer_and_filter_content && !socket_is_still_alive(csp->cfd))
3342 log_error(LOG_LEVEL_CONNECT,
3343 "The server still wants to talk, but the client may already have hung up on us.");
3345 log_error(LOG_LEVEL_CONNECT,
3346 "The server still wants to talk, but the client hung up on us.");
3347 mark_server_socket_tainted(csp);
3348 #ifdef FEATURE_HTTPS_INSPECTION
3349 close_client_and_server_ssl_connections(csp);
3352 #endif /* def _WIN32 */
3354 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3356 #ifdef FEATURE_HTTPS_INSPECTION
3358 * Reading data from standard or secured connection (HTTP/HTTPS)
3360 if (server_use_ssl(csp))
3362 len = ssl_recv_data(&(csp->ssl_server_attr),
3363 (unsigned char *)csp->receive_buffer, csp->receive_buffer_size);
3368 len = read_socket(csp->server_connection.sfd, csp->receive_buffer,
3369 (int)csp->receive_buffer_size);
3374 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
3376 if ((http->ssl && (csp->fwd == NULL))
3377 #ifdef FEATURE_HTTPS_INSPECTION
3383 * Just hang up. We already confirmed the client's CONNECT
3384 * request with status code 200 and unencrypted content is
3385 * no longer welcome.
3387 log_error(LOG_LEVEL_ERROR,
3388 "CONNECT already confirmed. Unable to tell the client about the problem.");
3391 else if (byte_count)
3394 * Just hang up. We already transmitted the original headers
3395 * and parts of the original content and therefore missed the
3396 * chance to send an error message (without risking data corruption).
3398 * XXX: we could retry with a fancy range request here.
3400 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
3401 "Unable to tell the client about the problem.");
3402 mark_server_socket_tainted(csp);
3403 #ifdef FEATURE_HTTPS_INSPECTION
3404 close_client_and_server_ssl_connections(csp);
3409 * XXX: Consider handling the cases above the same.
3411 mark_server_socket_tainted(csp);
3415 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3416 if (csp->flags & CSP_FLAG_CHUNKED)
3418 if ((len >= 5) && !memcmp(csp->receive_buffer+len-5, "0\r\n\r\n", 5))
3420 /* XXX: this is a temporary hack */
3421 log_error(LOG_LEVEL_CONNECT,
3422 "Looks like we reached the end of the last chunk. "
3423 "We better stop reading.");
3424 csp->expected_content_length = byte_count + (unsigned long long)len;
3425 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
3429 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
3432 * This is guaranteed by allocating with zalloc_or_die()
3433 * and never (intentionally) writing to the last byte.
3435 * csp->receive_buffer_size is the size of the part of the
3436 * buffer we intentionally write to, but we actually
3437 * allocated csp->receive_buffer_size+1 bytes so the assertion
3438 * stays within the allocated range.
3440 assert(csp->receive_buffer[csp->receive_buffer_size] == '\0');
3443 * Add a trailing zero to let be able to use string operations.
3444 * XXX: do we still need this with filter_popups gone?
3446 assert(len <= csp->receive_buffer_size);
3447 csp->receive_buffer[len] = '\0';
3450 * Normally, this would indicate that we've read
3451 * as much as the server has sent us and we can
3452 * close the client connection. However, Microsoft
3453 * in its wisdom has released IIS/5 with a bug that
3454 * prevents it from sending the trailing \r\n in
3455 * a 302 redirect header (and possibly other headers).
3456 * To work around this if we've haven't parsed
3457 * a full header we'll append a trailing \r\n
3458 * and see if this now generates a valid one.
3460 * This hack shouldn't have any impacts. If we've
3461 * already transmitted the header or if this is a
3462 * SSL connection, then we won't bother with this
3463 * hack. So we only work on partially received
3464 * headers. If we append a \r\n and this still
3465 * doesn't generate a valid header, then we won't
3466 * transmit anything to the client.
3471 if (server_body || (http->ssl
3472 #ifdef FEATURE_HTTPS_INSPECTION
3478 * If we have been buffering up the document,
3479 * now is the time to apply content modification
3480 * and send the result to the client.
3482 if (buffer_and_filter_content)
3484 p = execute_content_filters(csp);
3486 * If content filtering fails, use the original
3487 * buffer and length.
3488 * (see p != NULL ? p : csp->iob->cur below)
3492 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
3494 #ifdef FEATURE_COMPRESSION
3495 else if ((csp->flags & CSP_FLAG_CLIENT_SUPPORTS_DEFLATE)
3496 && (csp->content_length > LOWER_LENGTH_LIMIT_FOR_COMPRESSION))
3498 char *compressed_content = compress_buffer(p,
3499 (size_t *)&csp->content_length, csp->config->compression_level);
3500 if (compressed_content != NULL)
3503 p = compressed_content;
3504 csp->flags |= CSP_FLAG_BUFFERED_CONTENT_DEFLATED;
3509 if (JB_ERR_OK != update_server_headers(csp))
3511 log_error(LOG_LEVEL_FATAL,
3512 "Failed to update server headers. after filtering.");
3515 hdr = list_to_text(csp->headers);
3518 /* FIXME Should handle error properly */
3519 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3522 #ifdef FEATURE_HTTPS_INSPECTION
3524 * Sending data with standard or secured connection (HTTP/HTTPS)
3526 if (client_use_ssl(csp))
3528 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
3529 (const unsigned char *)hdr, strlen(hdr),
3530 get_write_delay(csp)) < 0)
3531 || (ssl_send_data_delayed(&(csp->ssl_client_attr),
3532 (const unsigned char *) ((p != NULL) ? p : csp->iob->cur),
3533 csp->content_length, get_write_delay(csp)) < 0))
3535 log_error(LOG_LEVEL_ERROR, "write modified content to "
3536 "client over TLS/SSL failed");
3539 mark_server_socket_tainted(csp);
3540 close_client_and_server_ssl_connections(csp);
3545 #endif /* def FEATURE_HTTPS_INSPECTION */
3547 if (write_socket_delayed(csp->cfd, hdr, strlen(hdr), write_delay)
3548 || write_socket_delayed(csp->cfd, ((p != NULL) ? p : csp->iob->cur),
3549 (size_t)csp->content_length, write_delay))
3551 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
3554 mark_server_socket_tainted(csp);
3563 break; /* "game over, man" */
3567 * This is NOT the body, so
3568 * Let's pretend the server just sent us a blank line.
3570 snprintf(csp->receive_buffer, csp->receive_buffer_size, "\r\n");
3571 len = (int)strlen(csp->receive_buffer);
3574 * Now, let the normal header parsing algorithm below do its
3575 * job. If it fails, we'll exit instead of continuing.
3582 * If we're in the body of the server document, just write it to
3583 * the client, unless we need to buffer the body for later
3584 * content-filtering.
3586 if (server_body || (http->ssl
3587 #ifdef FEATURE_HTTPS_INSPECTION
3592 if (buffer_and_filter_content)
3595 * If there is no memory left for buffering the content, or the buffer limit
3596 * has been reached, switch to non-filtering mode, i.e. make & write the
3597 * header, flush the iob and buf, and get out of the way.
3599 if (add_to_iob(csp->iob, csp->config->buffer_limit, csp->receive_buffer, len))
3604 log_error(LOG_LEVEL_INFO,
3605 "Flushing header and buffers. Stepping back from filtering.");
3607 hdr = list_to_text(csp->headers);
3611 * Memory is too tight to even generate the header.
3612 * Send our static "Out-of-memory" page.
3614 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
3615 rsp = cgi_error_memory();
3616 send_crunch_response(csp, rsp);
3617 mark_server_socket_tainted(csp);
3618 #ifdef FEATURE_HTTPS_INSPECTION
3619 close_client_and_server_ssl_connections(csp);
3623 hdrlen = strlen(hdr);
3625 #ifdef FEATURE_HTTPS_INSPECTION
3627 * Sending data with standard or secured connection (HTTP/HTTPS)
3629 if (client_use_ssl(csp))
3631 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
3632 (const unsigned char *)hdr, hdrlen, get_write_delay(csp)) < 0)
3633 || ((flushed = ssl_flush_socket(&(csp->ssl_client_attr),
3635 || (ssl_send_data_delayed(&(csp->ssl_client_attr),
3636 (const unsigned char *)csp->receive_buffer, (size_t)len,
3637 get_write_delay(csp)) < 0))
3639 log_error(LOG_LEVEL_CONNECT,
3640 "Flush header and buffers to client failed");
3642 mark_server_socket_tainted(csp);
3643 close_client_and_server_ssl_connections(csp);
3648 #endif /* def FEATURE_HTTPS_INSPECTION */
3650 if (write_socket_delayed(csp->cfd, hdr, hdrlen, write_delay)
3651 || ((flushed = flush_iob(csp->cfd, csp->iob, write_delay)) < 0)
3652 || write_socket_delayed(csp->cfd, csp->receive_buffer, (size_t)len,
3655 log_error(LOG_LEVEL_CONNECT,
3656 "Flush header and buffers to client failed: %E");
3658 mark_server_socket_tainted(csp);
3664 * Reset the byte_count to the amount of bytes
3665 * we just flushed. len will be added a few lines below,
3666 * hdrlen doesn't matter for LOG_LEVEL_CLF.
3668 byte_count = (unsigned long long)flushed;
3670 buffer_and_filter_content = 0;
3676 #ifdef FEATURE_HTTPS_INSPECTION
3678 * Sending data with standard or secured connection (HTTP/HTTPS)
3680 if (client_use_ssl(csp))
3682 ret = ssl_send_data_delayed(&(csp->ssl_client_attr),
3683 (const unsigned char *)csp->receive_buffer, (size_t)len,
3684 get_write_delay(csp));
3687 log_error(LOG_LEVEL_ERROR,
3688 "Sending data to client failed");
3689 mark_server_socket_tainted(csp);
3690 close_client_and_server_ssl_connections(csp);
3695 #endif /* def FEATURE_HTTPS_INSPECTION */
3697 if (write_socket_delayed(csp->cfd, csp->receive_buffer,
3698 (size_t)len, write_delay))
3700 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
3701 mark_server_socket_tainted(csp);
3706 byte_count += (unsigned long long)len;
3712 * We're still looking for the end of the server's header.
3713 * Buffer up the data we just read. If that fails, there's
3714 * little we can do but send our static out-of-memory page.
3716 if (add_to_iob(csp->iob, csp->config->buffer_limit, csp->receive_buffer, len))
3718 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
3719 rsp = cgi_error_memory();
3720 send_crunch_response(csp, rsp);
3721 mark_server_socket_tainted(csp);
3722 #ifdef FEATURE_HTTPS_INSPECTION
3723 close_client_and_server_ssl_connections(csp);
3728 /* Convert iob into something sed() can digest */
3729 if (JB_ERR_PARSE == get_server_headers(csp))
3734 * Well, we tried our MS IIS/5 hack and it didn't work.
3735 * The header is incomplete and there isn't anything
3736 * we can do about it.
3738 log_error(LOG_LEVEL_ERROR, "Invalid server headers. "
3739 "Applying the MS IIS5 hack didn't help.");
3740 log_error(LOG_LEVEL_CLF,
3741 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3742 #ifdef FEATURE_HTTPS_INSPECTION
3744 * Sending data with standard or secured connection (HTTP/HTTPS)
3746 if (client_use_ssl(csp))
3748 ssl_send_data_delayed(&(csp->ssl_client_attr),
3749 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3750 strlen(INVALID_SERVER_HEADERS_RESPONSE), get_write_delay(csp));
3753 #endif /* def FEATURE_HTTPS_INSPECTION */
3755 write_socket_delayed(csp->cfd,
3756 INVALID_SERVER_HEADERS_RESPONSE,
3757 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
3759 mark_server_socket_tainted(csp);
3760 #ifdef FEATURE_HTTPS_INSPECTION
3761 close_client_and_server_ssl_connections(csp);
3768 * Since we have to wait for more from the server before
3769 * we can parse the headers we just continue here.
3771 log_error(LOG_LEVEL_CONNECT,
3772 "Continuing buffering server headers from socket %d. "
3773 "Bytes most recently read: %ld.", csp->cfd, len);
3780 * Account for the content bytes we
3781 * might have gotten with the headers.
3783 assert(csp->iob->eod >= csp->iob->cur);
3784 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
3787 /* Did we actually get anything? */
3788 if (NULL == csp->headers->first)
3790 if ((csp->flags & CSP_FLAG_REUSED_CLIENT_CONNECTION))
3792 log_error(LOG_LEVEL_ERROR,
3793 "No server or forwarder response received on socket %d. "
3794 "Closing client socket %d without sending data.",
3795 csp->server_connection.sfd, csp->cfd);
3796 log_error(LOG_LEVEL_CLF,
3797 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3801 log_error(LOG_LEVEL_ERROR,
3802 "No server or forwarder response received on socket %d.",
3803 csp->server_connection.sfd);
3804 send_crunch_response(csp, error_response(csp, "no-server-data"));
3806 free_http_request(http);
3807 mark_server_socket_tainted(csp);
3808 #ifdef FEATURE_HTTPS_INSPECTION
3809 close_client_and_server_ssl_connections(csp);
3814 if (!csp->headers->first->str)
3816 log_error(LOG_LEVEL_ERROR, "header search: csp->headers->first->str == NULL, assert will be called");
3818 assert(csp->headers->first->str);
3820 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3821 strncmpic(csp->headers->first->str, "ICY", 3))
3824 * It doesn't look like a HTTP (or Shoutcast) response:
3825 * tell the client and log the problem.
3827 if (strlen(csp->headers->first->str) > 30)
3829 csp->headers->first->str[30] = '\0';
3831 log_error(LOG_LEVEL_ERROR,
3832 "Invalid server or forwarder response. Starts with: %s",
3833 csp->headers->first->str);
3834 log_error(LOG_LEVEL_CLF,
3835 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3836 #ifdef FEATURE_HTTPS_INSPECTION
3838 * Sending data with standard or secured connection (HTTP/HTTPS)
3840 if (client_use_ssl(csp))
3842 ssl_send_data_delayed(&(csp->ssl_client_attr),
3843 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3844 strlen(INVALID_SERVER_HEADERS_RESPONSE),
3845 get_write_delay(csp));
3848 #endif /* def FEATURE_HTTPS_INSPECTION */
3850 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3851 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
3853 free_http_request(http);
3854 mark_server_socket_tainted(csp);
3855 #ifdef FEATURE_HTTPS_INSPECTION
3856 close_client_and_server_ssl_connections(csp);
3862 * We have now received the entire server header,
3863 * filter it and send the result to the client
3865 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3867 log_error(LOG_LEVEL_CLF,
3868 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3869 #ifdef FEATURE_HTTPS_INSPECTION
3871 * Sending data with standard or secured connection (HTTP/HTTPS)
3873 if (client_use_ssl(csp))
3875 ssl_send_data_delayed(&(csp->ssl_client_attr),
3876 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3877 strlen(INVALID_SERVER_HEADERS_RESPONSE),
3878 get_write_delay(csp));
3883 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3884 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
3886 free_http_request(http);
3887 mark_server_socket_tainted(csp);
3888 #ifdef FEATURE_HTTPS_INSPECTION
3889 close_client_and_server_ssl_connections(csp);
3893 hdr = list_to_text(csp->headers);
3896 /* FIXME Should handle error properly */
3897 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3900 if ((csp->flags & CSP_FLAG_CHUNKED)
3901 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3902 && ((csp->iob->eod - csp->iob->cur) >= 5)
3903 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
3905 log_error(LOG_LEVEL_CONNECT,
3906 "Looks like we got the last chunk together with "
3907 "the server headers. We better stop reading.");
3908 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
3909 csp->expected_content_length = byte_count;
3910 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
3913 csp->server_connection.response_received = time(NULL);
3915 if (crunch_response_triggered(csp, crunchers_light))
3918 * One of the tags created by a server-header
3919 * tagger triggered a crunch. We already
3920 * delivered the crunch response to the client
3921 * and are done here after cleaning up.
3924 mark_server_socket_tainted(csp);
3925 #ifdef FEATURE_HTTPS_INSPECTION
3926 close_client_and_server_ssl_connections(csp);
3931 /* Buffer and pcrs filter this if appropriate. */
3932 buffer_and_filter_content = content_requires_filtering(csp);
3934 if (!buffer_and_filter_content)
3937 * Write the server's (modified) header to
3938 * the client (along with anything else that
3939 * may be in the buffer). Use standard or secured
3942 #ifdef FEATURE_HTTPS_INSPECTION
3943 if (client_use_ssl(csp))
3945 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
3946 (const unsigned char *)hdr, strlen(hdr),
3947 get_write_delay(csp)) < 0)
3948 || ((len = ssl_flush_socket(&(csp->ssl_client_attr),
3951 log_error(LOG_LEVEL_CONNECT, "Write header to client failed");
3954 * The write failed, so don't bother mentioning it
3955 * to the client... it probably can't hear us anyway.
3958 mark_server_socket_tainted(csp);
3959 #ifdef FEATURE_HTTPS_INSPECTION
3960 close_client_and_server_ssl_connections(csp);
3966 #endif /* def FEATURE_HTTPS_INSPECTION */
3968 if (write_socket_delayed(csp->cfd, hdr, strlen(hdr), write_delay)
3969 || ((len = flush_iob(csp->cfd, csp->iob, write_delay)) < 0))
3971 log_error(LOG_LEVEL_ERROR,
3972 "write header to client failed");
3974 * The write failed, so don't bother mentioning it
3975 * to the client... it probably can't hear us anyway.
3978 mark_server_socket_tainted(csp);
3984 /* we're finished with the server's header */
3990 * If this was a MS IIS/5 hack then it means the server
3991 * has already closed the connection. Nothing more to read.
3996 log_error(LOG_LEVEL_ERROR,
3997 "Closed server connection detected. "
3998 "Applying the MS IIS5 hack didn't help.");
3999 log_error(LOG_LEVEL_CLF,
4000 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
4001 #ifdef FEATURE_HTTPS_INSPECTION
4003 * Sending data with standard or secured connection (HTTP/HTTPS)
4005 if (client_use_ssl(csp))
4007 ssl_send_data_delayed(&(csp->ssl_client_attr),
4008 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
4009 strlen(INVALID_SERVER_HEADERS_RESPONSE),
4010 get_write_delay(csp));
4013 #endif /* def FEATURE_HTTPS_INSPECTION */
4015 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
4016 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
4018 mark_server_socket_tainted(csp);
4019 #ifdef FEATURE_HTTPS_INSPECTION
4020 close_client_and_server_ssl_connections(csp);
4027 mark_server_socket_tainted(csp);
4028 #ifdef FEATURE_HTTPS_INSPECTION
4029 close_client_and_server_ssl_connections(csp);
4031 return; /* huh? we should never get here */
4034 if (csp->content_length == 0)
4037 * If Privoxy didn't recalculate the Content-Length,
4038 * byte_count is still correct.
4040 csp->content_length = byte_count;
4043 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4044 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
4045 && (csp->expected_content_length != byte_count))
4047 log_error(LOG_LEVEL_CONNECT,
4048 "Received %llu bytes while expecting %llu.",
4049 byte_count, csp->expected_content_length);
4050 mark_server_socket_tainted(csp);
4054 #ifdef FEATURE_HTTPS_INSPECTION
4055 if (client_use_ssl(csp))
4057 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s https://%s%s %s\" 200 %llu",
4058 csp->ip_addr_str, http->gpc, http->hostport, http->path,
4059 http->version, csp->content_length);
4064 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
4065 csp->ip_addr_str, http->ocmd, csp->content_length);
4067 csp->server_connection.timestamp = time(NULL);
4071 /*********************************************************************
4075 * Description : Once a connection from the client has been accepted,
4076 * this function is called (via serve()) to handle the
4077 * main business of the communication. This function
4078 * returns after dealing with a single request. It can
4079 * be called multiple times with the same client socket
4080 * if the client is keeping the connection alive.
4082 * The decision whether or not a client connection will
4083 * be kept alive is up to the caller which also must
4084 * close the client socket when done.
4086 * FIXME: chat is nearly thousand lines long.
4090 * 1 : csp = Current client state (buffers, headers, etc...)
4092 * Returns : Nothing.
4094 *********************************************************************/
4095 static void chat(struct client_state *csp)
4097 const struct forward_spec *fwd;
4098 struct http_request *http;
4099 /* Skeleton for HTTP response, if we should intercept the request */
4100 struct http_response *rsp;
4101 #ifdef FEATURE_HTTPS_INSPECTION
4102 int use_ssl_tunnel = 0;
4107 if (receive_client_request(csp) != JB_ERR_OK)
4111 if (parse_client_request(csp) != JB_ERR_OK)
4116 /* decide how to route the HTTP request */
4117 fwd = forward_url(csp, http);
4119 #ifdef FEATURE_HTTPS_INSPECTION
4121 * Setting flags to use old solution with SSL tunnel and to disable
4122 * certificate verification.
4124 if (csp->http->ssl && !(csp->action->flags & ACTION_HTTPS_INSPECTION)
4125 && !cgi_page_requested(csp->http->host))
4130 if (http->ssl && (csp->action->flags & ACTION_IGNORE_CERTIFICATE_ERRORS))
4132 csp->dont_verify_certificate = 1;
4137 * build the http request to send to the server
4138 * we have to do one of the following:
4140 * create = use the original HTTP request to create a new
4141 * HTTP request that has either the path component
4142 * without the http://domainspec (w/path) or the
4143 * full orininal URL (w/url)
4144 * Note that the path and/or the HTTP version may
4145 * have been altered by now.
4147 * SSL proxy = Open a socket to the host:port of the server
4148 * and create TLS/SSL connection with server and
4149 * with client. Then behave like mediator between
4150 * client and server over TLS/SSL.
4152 * SSL proxy = Pass the request unchanged if forwarding a CONNECT
4153 * with request to a parent proxy. Note that we'll be sending
4154 * forwarding the CFAIL message ourselves if connecting to the parent
4155 * fails, but we won't send a CSUCCEED message if it works,
4156 * since that would result in a double message (ours and the
4157 * parent's). After sending the request to the parent, we
4158 * must parse answer and send it to client. If connection
4159 * with server is established, we do TLS/SSL proxy. Otherwise
4160 * we send parent response to client and close connections.
4162 * here's the matrix:
4165 * +--------+--------+
4167 * 0 | create | SSL |
4168 * | w/path | proxy |
4169 * Forwarding +--------+--------+
4171 * 1 | create | proxy |
4172 * | w/url |+forward|
4173 * +--------+--------+
4177 #ifdef FEATURE_HTTPS_INSPECTION
4179 * Presetting SSL client and server flags
4181 if (http->ssl && !use_ssl_tunnel)
4183 http->client_ssl = 1;
4184 http->server_ssl = 1;
4188 http->client_ssl = 0;
4189 http->server_ssl = 0;
4193 #ifdef FEATURE_HTTPS_INSPECTION
4195 * Log the request unless we're https inspecting
4196 * in which case we don't have the path yet and
4197 * will log the request later.
4199 if (!client_use_ssl(csp))
4202 log_error(LOG_LEVEL_REQUEST, "%s%s", http->hostport, http->path);
4205 if (http->ssl && connect_port_is_forbidden(csp))
4207 const char *acceptable_connect_ports =
4208 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
4209 assert(NULL != acceptable_connect_ports);
4210 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
4211 "limit-connect{%s} doesn't allow CONNECT requests to %s",
4212 csp->ip_addr_str, acceptable_connect_ports, csp->http->hostport);
4213 csp->action->flags |= ACTION_BLOCK;
4215 #ifdef FEATURE_HTTPS_INSPECTION
4216 http->client_ssl = 0;
4217 http->server_ssl = 0;
4222 freez(csp->headers->first->str);
4223 build_request_line(csp, fwd, &csp->headers->first->str);
4226 * We have a request. Check if one of the crunchers wants it
4227 * unless the client wants to use TLS/SSL in which case we
4228 * haven't setup the TLS context yet and will send the crunch
4232 #ifdef FEATURE_HTTPS_INSPECTION
4233 !client_use_ssl(csp) &&
4235 crunch_response_triggered(csp, crunchers_all))
4238 * Yes. The client got the crunch response and we're done here.
4243 log_applied_actions(csp->action);
4244 if (fwd->forward_host)
4246 log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
4247 fwd->forward_host, fwd->forward_port, http->hostport);
4251 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
4254 /* here we connect to the server, gateway, or the forwarder */
4256 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4257 if ((csp->server_connection.sfd != JB_INVALID_SOCKET)
4258 && socket_is_still_alive(csp->server_connection.sfd)
4259 && connection_destination_matches(&csp->server_connection, http, fwd))
4261 log_error(LOG_LEVEL_CONNECT,
4262 "Reusing server socket %d connected to %s. Total requests: %u.",
4263 csp->server_connection.sfd, csp->server_connection.host,
4264 csp->server_connection.requests_sent_total);
4268 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
4270 #ifdef FEATURE_CONNECTION_SHARING
4271 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING
4272 #ifdef FEATURE_HTTPS_INSPECTION
4273 && !server_use_ssl(csp)
4277 remember_connection(&csp->server_connection);
4280 #endif /* def FEATURE_CONNECTION_SHARING */
4282 log_error(LOG_LEVEL_CONNECT,
4283 "Closing server socket %d connected to %s. Total requests: %u.",
4284 csp->server_connection.sfd, csp->server_connection.host,
4285 csp->server_connection.requests_sent_total);
4286 close_socket(csp->server_connection.sfd);
4288 mark_connection_closed(&csp->server_connection);
4290 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4291 #ifdef FEATURE_HTTPS_INSPECTION
4292 if (client_use_ssl(csp) && !use_ssl_tunnel)
4296 * Creating a SSL proxy.
4298 * By sending the CSUCCEED message we're lying to the client as
4299 * the connection hasn't actually been established yet. We don't
4300 * establish the connection until we have seen and parsed the
4301 * encrypted client headers.
4303 if (write_socket_delayed(csp->cfd, CSUCCEED,
4304 strlen(CSUCCEED), get_write_delay(csp)) != 0)
4306 log_error(LOG_LEVEL_ERROR, "Sending SUCCEED to client failed");
4310 ret = create_client_ssl_connection(csp);
4313 log_error(LOG_LEVEL_ERROR,
4314 "Failed to open a secure connection with the client");
4317 if (JB_ERR_OK != process_encrypted_request(csp))
4319 close_client_ssl_connection(csp);
4323 * We have an encrypted request. Check if one of the crunchers now
4324 * wants it (for example because the previously invisible path was
4325 * required to match).
4327 if (crunch_response_triggered(csp, crunchers_all))
4330 * Yes. The client got the crunch response and we're done here.
4337 * Connecting to destination server
4339 csp->server_connection.sfd = forwarded_connect(fwd, http, csp);
4341 if (csp->server_connection.sfd == JB_INVALID_SOCKET)
4343 if (fwd->type != SOCKS_NONE)
4346 rsp = error_response(csp, "forwarding-failed");
4348 else if (errno == EINVAL)
4350 rsp = error_response(csp, "no-such-domain");
4354 rsp = error_response(csp, "connect-failed");
4357 /* Write the answer to the client */
4360 send_crunch_response(csp, rsp);
4364 * Temporary workaround to prevent already-read client
4365 * bodies from being parsed as new requests. For now we
4366 * err on the safe side and throw all the following
4367 * requests under the bus, even if no client body has been
4368 * buffered. A compliant client will repeat the dropped
4369 * requests on an untainted connection.
4371 * The proper fix is to discard the no longer needed
4372 * client body in the buffer (if there is one) and to
4373 * continue parsing the bytes that follow.
4375 #ifdef FEATURE_HTTPS_INSPECTION
4376 close_client_ssl_connection(csp);
4378 drain_and_close_socket(csp->cfd);
4379 csp->cfd = JB_INVALID_SOCKET;
4384 #ifdef FEATURE_HTTPS_INSPECTION
4386 * Creating TLS/SSL connections with destination server or parent
4387 * proxy. If forwarding is enabled, we must send client request to
4388 * parent proxy and receive, parse and resend parent proxy answer.
4390 if (http->ssl && !use_ssl_tunnel)
4392 if (fwd->forward_host != NULL)
4394 char server_response[BUFFER_SIZE];
4397 char *hdr = list_to_text(csp->headers);
4398 memset(server_response, 0, sizeof(server_response));
4402 log_error(LOG_LEVEL_FATAL,
4403 "Out of memory parsing client header");
4405 list_remove_all(csp->headers);
4408 * Sending client's CONNECT request to the parent proxy
4410 ret = write_socket(csp->server_connection.sfd, hdr, strlen(hdr));
4416 log_error(LOG_LEVEL_CONNECT,
4417 "Sending request headers to: %s failed", http->hostport);
4418 mark_server_socket_tainted(csp);
4419 close_client_ssl_connection(csp);
4423 /* Waiting for parent proxy server response */
4424 len = read_socket(csp->server_connection.sfd, server_response,
4425 sizeof(server_response)-1);
4429 log_error(LOG_LEVEL_ERROR, "No response from parent proxy "
4430 "server on socket %d.", csp->server_connection.sfd);
4432 rsp = error_response(csp, "no-server-data");
4435 send_crunch_response(csp, rsp);
4437 mark_server_socket_tainted(csp);
4438 close_client_ssl_connection(csp);
4443 * Test if the connection to the destination server was
4444 * established successfully by the parent proxy.
4446 if (!tunnel_established_successfully(server_response, (unsigned int)len))
4448 log_error(LOG_LEVEL_ERROR,
4449 "The forwarder %s failed to establish a connection with %s",
4450 fwd->forward_host, http->host);
4451 rsp = error_response(csp, "connect-failed");
4454 send_crunch_response(csp, rsp);
4456 mark_server_socket_tainted(csp);
4457 close_client_ssl_connection(csp);
4460 } /* -END- if (fwd->forward_host != NULL) */
4463 * We can now create the TLS/SSL connection with the destination server.
4465 int ret = create_server_ssl_connection(csp);
4468 if (csp->server_cert_verification_result != SSL_CERT_VALID &&
4469 csp->server_cert_verification_result != SSL_CERT_NOT_VERIFIED)
4472 * If the server certificate is invalid, we must inform
4473 * the client and then close connection to the client.
4475 ssl_send_certificate_error(csp);
4476 close_client_and_server_ssl_connections(csp);
4479 if (csp->server_cert_verification_result == SSL_CERT_NOT_VERIFIED
4480 || csp->server_cert_verification_result == SSL_CERT_VALID)
4483 * The TLS/SSL connection wasn't created but an invalid
4484 * certificate wasn't detected. Report it as connection
4487 rsp = error_response(csp, "connect-failed");
4490 send_crunch_response(csp, rsp);
4492 close_client_and_server_ssl_connections(csp);
4496 }/* -END- if (http->ssl) */
4497 #endif /* def FEATURE_HTTPS_INSPECTION */
4499 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4500 save_connection_destination(csp->server_connection.sfd,
4501 http, fwd, &csp->server_connection);
4502 csp->server_connection.keep_alive_timeout =
4503 (unsigned)csp->config->keep_alive_timeout;
4505 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4507 csp->server_connection.requests_sent_total++;
4509 if ((fwd->type == SOCKS_5T) && (NULL == csp->headers->first))
4511 /* Client headers have been sent optimistically */
4512 assert(csp->headers->last == NULL);
4514 else if (http->ssl == 0 || (fwd->forward_host
4515 #ifdef FEATURE_HTTPS_INSPECTION
4520 if (send_http_request(csp))
4522 rsp = error_response(csp, "connect-failed");
4525 send_crunch_response(csp, rsp);
4533 * Using old solution with SSL tunnel or new solution with SSL proxy
4535 list_remove_all(csp->headers);
4536 #ifdef FEATURE_HTTPS_INSPECTION
4541 * We're running an SSL tunnel and we're not forwarding,
4542 * so just ditch the client headers, send the "connect succeeded"
4543 * message to the client, flush the rest, and get out of the way.
4545 if (write_socket_delayed(csp->cfd, CSUCCEED,
4546 strlen(CSUCCEED), get_write_delay(csp)))
4551 #ifdef FEATURE_HTTPS_INSPECTION
4555 * If server certificate has been verified and is invalid,
4556 * we must inform the client and then close the connection
4557 * with client and server.
4559 if (csp->server_cert_verification_result != SSL_CERT_VALID &&
4560 csp->server_cert_verification_result != SSL_CERT_NOT_VERIFIED)
4562 ssl_send_certificate_error(csp);
4563 close_client_and_server_ssl_connections(csp);
4566 if (send_https_request(csp))
4568 rsp = error_response(csp, "connect-failed");
4571 send_crunch_response(csp, rsp);
4573 close_client_and_server_ssl_connections(csp);
4577 #endif /* def FEATURE_HTTPS_INSPECTION */
4578 clear_iob(csp->client_iob);
4579 }/* -END- else ... if (http->ssl == 1) */
4581 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
4583 /* XXX: should the time start earlier for optimistically sent data? */
4584 csp->server_connection.request_sent = time(NULL);
4586 handle_established_connection(csp);
4587 freez(csp->receive_buffer);
4592 /*********************************************************************
4594 * Function : fuzz_server_response
4596 * Description : Treat the input as a whole server response.
4599 * 1 : csp = Current client state (buffers, headers, etc...)
4600 * 2 : fuzz_input_file = File to read the input from.
4604 *********************************************************************/
4605 extern int fuzz_server_response(struct client_state *csp, char *fuzz_input_file)
4607 static struct forward_spec fwd; /* Zero'd due to being static */
4610 if (strcmp(fuzz_input_file, "-") == 0)
4612 /* XXX: Doesn't work yet. */
4613 csp->server_connection.sfd = 0;
4617 csp->server_connection.sfd = open(fuzz_input_file, O_RDONLY);
4618 if (csp->server_connection.sfd == -1)
4620 log_error(LOG_LEVEL_FATAL, "Failed to open %s: %E",
4625 csp->content_type |= CT_GIF;
4626 csp->action->flags |= ACTION_DEANIMATE;
4627 csp->action->string[ACTION_STRING_DEANIMATE] = "last";
4629 csp->http->path = strdup_or_die("/");
4630 csp->http->host = strdup_or_die("fuzz.example.org");
4631 csp->http->hostport = strdup_or_die("fuzz.example.org:80");
4632 /* Prevent client socket monitoring */
4633 csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
4634 csp->flags |= CSP_FLAG_CHUNKED;
4636 csp->config->feature_flags |= RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE;
4637 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
4639 csp->content_type |= CT_DECLARED|CT_GIF;
4641 csp->config->socket_timeout = 0;
4643 cgi_init_error_messages();
4645 handle_established_connection(csp);
4646 freez(csp->receive_buffer);
4653 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4654 /*********************************************************************
4656 * Function : prepare_csp_for_next_request
4658 * Description : Put the csp in a mostly vergin state.
4661 * 1 : csp = Current client state (buffers, headers, etc...)
4665 *********************************************************************/
4666 static void prepare_csp_for_next_request(struct client_state *csp)
4668 csp->content_type = 0;
4669 csp->content_length = 0;
4670 csp->expected_content_length = 0;
4671 csp->expected_client_content_length = 0;
4672 list_remove_all(csp->headers);
4673 clear_iob(csp->iob);
4674 freez(csp->error_message);
4675 free_http_request(csp->http);
4676 destroy_list(csp->headers);
4677 #ifdef FEATURE_HTTPS_INSPECTION
4678 destroy_list(csp->https_headers);
4680 destroy_list(csp->tags);
4681 #ifdef FEATURE_CLIENT_TAGS
4682 destroy_list(csp->client_tags);
4683 freez(csp->client_address);
4685 free_current_action(csp->action);
4686 if (NULL != csp->fwd)
4688 unload_forward_spec(csp->fwd);
4691 /* XXX: Store per-connection flags someplace else. */
4692 csp->flags = (CSP_FLAG_ACTIVE | CSP_FLAG_REUSED_CLIENT_CONNECTION);
4693 #ifdef FEATURE_TOGGLE
4694 if (global_toggle_state)
4695 #endif /* def FEATURE_TOGGLE */
4697 csp->flags |= CSP_FLAG_TOGGLED_ON;
4700 if (csp->client_iob->eod > csp->client_iob->cur)
4702 long bytes_to_shift = csp->client_iob->cur - csp->client_iob->buf;
4703 size_t data_length = (size_t)(csp->client_iob->eod - csp->client_iob->cur);
4705 assert(bytes_to_shift > 0);
4706 assert(data_length > 0);
4708 log_error(LOG_LEVEL_CONNECT, "Shifting %lu pipelined bytes by %ld bytes",
4709 data_length, bytes_to_shift);
4710 memmove(csp->client_iob->buf, csp->client_iob->cur, data_length);
4711 csp->client_iob->cur = csp->client_iob->buf;
4712 assert(csp->client_iob->eod == csp->client_iob->buf + bytes_to_shift + data_length);
4713 csp->client_iob->eod = csp->client_iob->buf + data_length;
4714 memset(csp->client_iob->eod, '\0', (size_t)bytes_to_shift);
4716 csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
4721 * We mainly care about resetting client_iob->cur so we don't
4722 * waste buffer space at the beginning and don't mess up the
4723 * request restoration done by cgi_show_request().
4725 * Freeing the buffer itself isn't technically necessary,
4726 * but makes debugging more convenient.
4728 clear_iob(csp->client_iob);
4731 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4734 /*********************************************************************
4738 * Description : This is little more than chat. We only "serve" to
4739 * to close (or remember) any socket that chat may have
4743 * 1 : csp = Current client state (buffers, headers, etc...)
4747 *********************************************************************/
4748 static void serve(struct client_state *csp)
4750 int config_file_change_detected = 0; /* Only used for debugging */
4751 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4752 #ifdef FEATURE_CONNECTION_SHARING
4753 static int monitor_thread_running = 0;
4754 #endif /* def FEATURE_CONNECTION_SHARING */
4755 int continue_chatting = 0;
4757 log_error(LOG_LEVEL_CONNECT, "Accepted connection from %s on socket %d",
4758 csp->ip_addr_str, csp->cfd);
4762 unsigned int latency;
4764 #ifdef FEATURE_HTTPS_INSPECTION
4765 if (continue_chatting && client_use_ssl(csp))
4767 continue_https_chat(csp);
4776 * If the request has been crunched,
4777 * the calculated latency is zero.
4779 latency = (unsigned)(csp->server_connection.response_received -
4780 csp->server_connection.request_sent) / 2;
4782 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
4783 && (csp->flags & CSP_FLAG_CRUNCHED)
4784 && (csp->expected_client_content_length != 0))
4786 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
4787 log_error(LOG_LEVEL_CONNECT,
4788 "Tainting client socket %d due to unread data.", csp->cfd);
4791 continue_chatting = (csp->config->feature_flags
4792 & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
4793 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
4794 && (csp->cfd != JB_INVALID_SOCKET)
4795 && (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
4796 && ((csp->flags & CSP_FLAG_SERVER_CONTENT_LENGTH_SET)
4797 || (csp->flags & CSP_FLAG_CHUNKED));
4799 if (!(csp->flags & CSP_FLAG_CRUNCHED)
4800 && (csp->server_connection.sfd != JB_INVALID_SOCKET))
4802 if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
4804 csp->server_connection.keep_alive_timeout = csp->config->default_server_timeout;
4806 if (!(csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
4807 || (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
4808 || !socket_is_still_alive(csp->server_connection.sfd)
4809 || !(latency < csp->server_connection.keep_alive_timeout))
4811 log_error(LOG_LEVEL_CONNECT,
4812 "Closing server socket %d connected to %s. "
4813 "Keep-alive: %u. Tainted: %u. Socket alive: %u. Timeout: %u.",
4814 csp->server_connection.sfd, (csp->server_connection.host != NULL) ?
4815 csp->server_connection.host : csp->http->host,
4816 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
4817 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
4818 socket_is_still_alive(csp->server_connection.sfd),
4819 csp->server_connection.keep_alive_timeout);
4820 #ifdef FEATURE_CONNECTION_SHARING
4821 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
4823 forget_connection(csp->server_connection.sfd);
4825 #endif /* def FEATURE_CONNECTION_SHARING */
4826 #ifdef FEATURE_HTTPS_INSPECTION
4827 close_server_ssl_connection(csp);
4829 close_socket(csp->server_connection.sfd);
4830 mark_connection_closed(&csp->server_connection);
4834 if (continue_chatting && any_loaded_file_changed(csp))
4836 continue_chatting = 0;
4837 config_file_change_detected = 1;
4839 #ifdef FEATURE_HTTPS_INSPECTION
4840 if (continue_chatting && client_use_ssl(csp) &&
4841 csp->ssl_with_client_is_opened == 0)
4843 continue_chatting = 0;
4844 log_error(LOG_LEVEL_CONNECT, "Client socket %d is no longer usable. "
4845 "The TLS session has been terminated.", csp->cfd);
4849 if (continue_chatting)
4851 if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) != 0)
4852 && socket_is_still_alive(csp->cfd))
4854 log_error(LOG_LEVEL_CONNECT, "Client request %d has been "
4855 "pipelined on socket %d and the socket is still alive.",
4856 csp->requests_received_total+1, csp->cfd);
4857 prepare_csp_for_next_request(csp);
4861 if (0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE))
4863 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
4865 log_error(LOG_LEVEL_CONNECT,
4866 "Waiting for the next client request on socket %d. "
4867 "Keeping the server socket %d to %s open.",
4868 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
4872 log_error(LOG_LEVEL_CONNECT,
4873 "Waiting for the next client request on socket %d. "
4874 "No server socket to keep open.", csp->cfd);
4878 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
4879 && data_is_available(csp->cfd, (int)csp->config->keep_alive_timeout)
4880 && socket_is_still_alive(csp->cfd))
4882 log_error(LOG_LEVEL_CONNECT,
4883 "Data arrived in time on client socket %d. Requests so far: %u",
4884 csp->cfd, csp->requests_received_total);
4885 prepare_csp_for_next_request(csp);
4889 #ifdef FEATURE_CONNECTION_SHARING
4890 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
4891 && (csp->server_connection.sfd != JB_INVALID_SOCKET)
4892 && (socket_is_still_alive(csp->server_connection.sfd))
4893 #ifdef FEATURE_HTTPS_INSPECTION
4894 && !server_use_ssl(csp)
4898 time_t time_open = time(NULL) - csp->server_connection.timestamp;
4900 if (csp->server_connection.keep_alive_timeout < time_open - (time_t)latency)
4905 remember_connection(&csp->server_connection);
4906 csp->server_connection.sfd = JB_INVALID_SOCKET;
4907 drain_and_close_socket(csp->cfd);
4908 csp->cfd = JB_INVALID_SOCKET;
4909 privoxy_mutex_lock(&connection_reuse_mutex);
4910 if (!monitor_thread_running)
4912 monitor_thread_running = 1;
4913 privoxy_mutex_unlock(&connection_reuse_mutex);
4914 wait_for_alive_connections();
4915 privoxy_mutex_lock(&connection_reuse_mutex);
4916 monitor_thread_running = 0;
4918 privoxy_mutex_unlock(&connection_reuse_mutex);
4920 #endif /* def FEATURE_CONNECTION_SHARING */
4924 else if (csp->server_connection.sfd != JB_INVALID_SOCKET)
4926 log_error(LOG_LEVEL_CONNECT,
4927 "Closing server socket %d connected to %s. Keep-alive: %u. "
4928 "Tainted: %u. Socket alive: %u. Timeout: %u. "
4929 "Configuration file change detected: %u",
4930 csp->server_connection.sfd, csp->server_connection.host,
4931 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
4932 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
4933 socket_is_still_alive(csp->server_connection.sfd),
4934 csp->server_connection.keep_alive_timeout,
4935 config_file_change_detected);
4937 } while (continue_chatting);
4941 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4943 if (csp->cfd != JB_INVALID_SOCKET)
4945 log_error(LOG_LEVEL_CONNECT, "Closing client socket %d. "
4946 "Keep-alive: %u. Socket alive: %u. Data available: %u. "
4947 "Configuration file change detected: %u. Requests received: %u.",
4948 csp->cfd, 0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE),
4949 socket_is_still_alive(csp->cfd), data_is_available(csp->cfd, 0),
4950 config_file_change_detected, csp->requests_received_total);
4951 #ifdef FEATURE_HTTPS_INSPECTION
4952 close_client_ssl_connection(csp);
4954 drain_and_close_socket(csp->cfd);
4957 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
4959 #ifdef FEATURE_CONNECTION_SHARING
4960 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
4962 forget_connection(csp->server_connection.sfd);
4964 #endif /* def FEATURE_CONNECTION_SHARING */
4966 #ifdef FEATURE_HTTPS_INSPECTION
4967 close_server_ssl_connection(csp);
4968 #endif /* def FEATURE_HTTPS_INSPECTION */
4970 close_socket(csp->server_connection.sfd);
4973 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4974 mark_connection_closed(&csp->server_connection);
4977 free_csp_resources(csp);
4979 csp->flags &= ~CSP_FLAG_ACTIVE;
4985 /*********************************************************************
4987 * Function : server_thread
4989 * Description : We only exist to call `serve' in a threaded environment.
4992 * 1 : data = Current client state (buffers, headers, etc...)
4994 * Returns : Always 0.
4996 *********************************************************************/
4997 static int32 server_thread(void *data)
4999 serve((struct client_state *) data);
5006 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
5007 /*********************************************************************
5011 * Description : Print usage info & exit.
5013 * Parameters : Pointer to argv[0] for identifying ourselves
5017 *********************************************************************/
5018 static void usage(const char *name)
5020 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
5021 "Usage: %s [--config-test] "
5024 #endif /* defined(unix) */
5027 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
5028 #endif /* defined(unix) */
5029 "[--version] [configfile]\n",
5033 show_fuzz_usage(name);
5036 printf("Aborting\n");
5041 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
5044 #ifdef MUTEX_LOCKS_AVAILABLE
5045 /*********************************************************************
5047 * Function : privoxy_mutex_lock
5049 * Description : Locks a mutex.
5052 * 1 : mutex = The mutex to lock.
5054 * Returns : Void. May exit in case of errors.
5056 *********************************************************************/
5057 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
5059 #ifdef FEATURE_PTHREAD
5060 int err = pthread_mutex_lock(mutex);
5063 if (mutex != &log_mutex)
5065 log_error(LOG_LEVEL_FATAL,
5066 "Mutex locking failed: %s.\n", strerror(err));
5071 EnterCriticalSection(mutex);
5072 #endif /* def FEATURE_PTHREAD */
5076 /*********************************************************************
5078 * Function : privoxy_mutex_unlock
5080 * Description : Unlocks a mutex.
5083 * 1 : mutex = The mutex to unlock.
5085 * Returns : Void. May exit in case of errors.
5087 *********************************************************************/
5088 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
5090 #ifdef FEATURE_PTHREAD
5091 int err = pthread_mutex_unlock(mutex);
5094 if (mutex != &log_mutex)
5096 log_error(LOG_LEVEL_FATAL,
5097 "Mutex unlocking failed: %s.\n", strerror(err));
5102 LeaveCriticalSection(mutex);
5103 #endif /* def FEATURE_PTHREAD */
5107 /*********************************************************************
5109 * Function : privoxy_mutex_init
5111 * Description : Prepares a mutex.
5114 * 1 : mutex = The mutex to initialize.
5116 * Returns : Void. May exit in case of errors.
5118 *********************************************************************/
5119 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
5121 #ifdef FEATURE_PTHREAD
5122 int err = pthread_mutex_init(mutex, 0);
5125 printf("Fatal error. Mutex initialization failed: %s.\n",
5130 InitializeCriticalSection(mutex);
5131 #endif /* def FEATURE_PTHREAD */
5133 #endif /* def MUTEX_LOCKS_AVAILABLE */
5135 /*********************************************************************
5137 * Function : initialize_mutexes
5139 * Description : Prepares mutexes if mutex support is available.
5143 * Returns : Void, exits in case of errors.
5145 *********************************************************************/
5146 static void initialize_mutexes(void)
5148 #ifdef MUTEX_LOCKS_AVAILABLE
5150 * Prepare global mutex semaphores
5153 #ifdef FEATURE_HTTPS_INSPECTION
5154 privoxy_mutex_init(&certificate_mutex);
5155 privoxy_mutex_init(&ssl_init_mutex);
5158 privoxy_mutex_init(&log_mutex);
5159 privoxy_mutex_init(&log_init_mutex);
5160 privoxy_mutex_init(&connection_reuse_mutex);
5161 #ifdef FEATURE_EXTERNAL_FILTERS
5162 privoxy_mutex_init(&external_filter_mutex);
5164 #ifdef FEATURE_CLIENT_TAGS
5165 privoxy_mutex_init(&client_tags_mutex);
5167 #ifdef FEATURE_EXTENDED_STATISTICS
5168 privoxy_mutex_init(&filter_statistics_mutex);
5169 privoxy_mutex_init(&block_statistics_mutex);
5173 * XXX: The assumptions below are a bit naive
5174 * and can cause locks that aren't necessary.
5176 * For example older FreeBSD versions (< 6.x?)
5177 * have no gethostbyname_r, but gethostbyname is
5180 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
5181 privoxy_mutex_init(&resolver_mutex);
5182 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
5184 * XXX: should we use a single mutex for
5185 * localtime() and gmtime() as well?
5187 #ifndef HAVE_GMTIME_R
5188 privoxy_mutex_init(&gmtime_mutex);
5189 #endif /* ndef HAVE_GMTIME_R */
5191 #ifndef HAVE_LOCALTIME_R
5192 privoxy_mutex_init(&localtime_mutex);
5193 #endif /* ndef HAVE_GMTIME_R */
5195 #if !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM)
5196 privoxy_mutex_init(&rand_mutex);
5197 #endif /* !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM) */
5199 #endif /* def MUTEX_LOCKS_AVAILABLE */
5202 /*********************************************************************
5206 * Description : Load the config file and start the listen loop.
5207 * This function is a lot more *sane* with the `load_config'
5208 * and `listen_loop' functions; although it stills does
5209 * a *little* too much for my taste.
5212 * 1 : argc = Number of parameters (including $0).
5213 * 2 : argv = Array of (char *)'s to the parameters.
5215 * Returns : 1 if : can't open config file, unrecognized directive,
5216 * stats requested in multi-thread mode, can't open the
5217 * log file, can't open the jar file, listen port is invalid,
5218 * any load fails, and can't bind port.
5220 * Else main never returns, the process must be signaled
5221 * to terminate execution. Or, on Windows, use the
5222 * "File", "Exit" menu option.
5224 *********************************************************************/
5226 int real_main(int argc, char **argv)
5228 int main(int argc, char **argv)
5232 int do_config_test = 0;
5233 #ifndef HAVE_ARC4RANDOM
5234 unsigned int random_seed;
5237 struct passwd *pw = NULL;
5238 struct group *grp = NULL;
5240 char *pre_chroot_nslookup_to_load_resolver = NULL;
5243 char *fuzz_input_type = NULL;
5244 char *fuzz_input_file = NULL;
5251 #if !defined(_WIN32)
5258 /* Prepare mutexes if supported and necessary. */
5259 initialize_mutexes();
5261 /* Enable logging until further notice. */
5265 * Parse the command line arguments
5267 * XXX: simply printing usage information in case of
5268 * invalid arguments isn't particularly user friendly.
5270 while (++argc_pos < argc)
5273 /* Check to see if the service must be installed or uninstalled */
5274 if (strncmp(argv[argc_pos], "--install", 9) == 0)
5276 const char *pName = argv[argc_pos] + 9;
5279 exit((install_service(pName)) ? 0 : 1);
5281 else if (strncmp(argv[argc_pos], "--uninstall", 11) == 0)
5283 const char *pName = argv[argc_pos] + 11;
5286 exit((uninstall_service(pName)) ? 0 : 1);
5288 else if (strcmp(argv[argc_pos], "--service") == 0)
5290 bRunAsService = TRUE;
5291 w32_set_service_cwd();
5292 atexit(w32_service_exit_notify);
5295 #endif /* defined(_WIN32) */
5298 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
5300 if (strcmp(argv[argc_pos], "--help") == 0)
5305 else if (strcmp(argv[argc_pos], "--version") == 0)
5307 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
5313 else if (strcmp(argv[argc_pos], "--no-daemon") == 0)
5315 set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
5319 else if (strcmp(argv[argc_pos], "--pidfile") == 0)
5321 if (++argc_pos == argc) usage(argv[0]);
5322 pidfile = strdup_or_die(argv[argc_pos]);
5325 else if (strcmp(argv[argc_pos], "--user") == 0)
5330 if (++argc_pos == argc) usage(argv[argc_pos]);
5332 user_arg = strdup_or_die(argv[argc_pos]);
5333 group_name = strchr(user_arg, '.');
5334 if (NULL != group_name)
5336 /* Nul-terminate the user name */
5339 /* Skip the former delimiter to actually reach the group name */
5342 grp = getgrnam(group_name);
5345 log_error(LOG_LEVEL_FATAL, "Group '%s' not found.", group_name);
5348 pw = getpwnam(user_arg);
5351 log_error(LOG_LEVEL_FATAL, "User '%s' not found.", user_arg);
5357 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup") == 0)
5359 if (++argc_pos == argc) usage(argv[0]);
5360 pre_chroot_nslookup_to_load_resolver = strdup_or_die(argv[argc_pos]);
5363 else if (strcmp(argv[argc_pos], "--chroot") == 0)
5367 #endif /* defined(unix) */
5369 else if (strcmp(argv[argc_pos], "--config-test") == 0)
5374 else if (strcmp(argv[argc_pos], "--fuzz") == 0)
5377 if (argc < argc_pos + 2) usage(argv[0]);
5378 fuzz_input_type = argv[argc_pos];
5380 fuzz_input_file = argv[argc_pos];
5382 else if (strcmp(argv[argc_pos], "--stfu") == 0)
5384 set_debug_level(LOG_LEVEL_STFU);
5387 else if (argc_pos + 1 != argc)
5390 * This is neither the last command line
5391 * option, nor was it recognized before,
5392 * therefore it must be invalid.
5398 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
5400 configfile = argv[argc_pos];
5403 } /* -END- while (more arguments) */
5405 show_version(Argv[0]);
5408 if (*configfile != '/')
5410 char cwd[BUFFER_SIZE];
5412 size_t abs_file_size;
5414 /* make config-filename absolute here */
5415 if (NULL == getcwd(cwd, sizeof(cwd)))
5417 perror("failed to get current working directory");
5421 basedir = strdup_or_die(cwd);
5423 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
5424 abs_file = malloc_or_die(abs_file_size);
5425 strlcpy(abs_file, basedir, abs_file_size);
5426 strlcat(abs_file, "/", abs_file_size);
5427 strlcat(abs_file, configfile, abs_file_size);
5428 configfile = abs_file;
5430 #endif /* defined unix */
5434 clients->next = NULL;
5436 /* XXX: factor out initialising after the next stable release. */
5441 #ifndef HAVE_ARC4RANDOM
5442 random_seed = (unsigned int)time(NULL);
5444 srandom(random_seed);
5447 #endif /* ifdef HAVE_RANDOM */
5448 #endif /* ifndef HAVE_ARC4RANDOM */
5451 * Unix signal handling
5453 * Catch the abort, interrupt and terminate signals for a graceful exit
5454 * Catch the hangup signal so the errlog can be reopened.
5456 * Ignore the broken pipe signal as connection failures
5457 * are handled when and where they occur without relying
5460 #if !defined(_WIN32)
5463 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP };
5465 for (idx = 0; idx < SZ(catched_signals); idx++)
5467 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
5468 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
5470 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
5471 #endif /* ifdef sun */
5473 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
5477 if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
5479 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for SIGPIPE: %E");
5483 #else /* ifdef _WIN32 */
5484 # ifdef _WIN_CONSOLE
5486 * We *are* in a windows console app.
5487 * Print a verbose messages about FAQ's and such
5489 printf("%s", win32_blurb);
5490 # endif /* def _WIN_CONSOLE */
5491 #endif /* def _WIN32 */
5494 if (fuzz_input_type != NULL)
5496 exit(process_fuzzed_input(fuzz_input_type, fuzz_input_file));
5498 log_error(LOG_LEVEL_FATAL,
5499 "When compiled with fuzzing support, Privoxy should only be used for fuzzing. "
5500 "Various data structures are static which is unsafe when using threads.");
5505 exit(NULL == load_config());
5508 /* Initialize the CGI subsystem */
5509 cgi_init_error_messages();
5512 * If running on unix and without the --no-daemon
5513 * option, become a daemon. I.e. fork, detach
5514 * from tty and get process group leadership
5523 if (pid < 0) /* error */
5528 else if (pid != 0) /* parent */
5533 * must check for errors
5534 * child died due to missing files aso
5537 wpid = waitpid(pid, &status, WNOHANG);
5549 * stderr (fd 2) will be closed later on,
5550 * when the config file has been parsed.
5556 * Reserve fd 0 and 1 to prevent abort() and friends
5557 * from sending stuff to the clients or servers.
5559 fd = open("/dev/null", O_RDONLY);
5562 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
5566 if (dup2(fd, 0) == -1)
5568 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 0: %E");
5572 fd = open("/dev/null", O_WRONLY);
5575 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
5579 if (dup2(fd, 1) == -1)
5581 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 1: %E");
5586 #ifdef FEATURE_EXTERNAL_FILTERS
5587 for (fd = 0; fd < 3; fd++)
5589 mark_socket_for_close_on_execute(fd);
5593 if (chdir("/") != 0)
5595 log_error(LOG_LEVEL_FATAL, "Failed to cd into '/': %E");
5598 } /* -END- if (daemon_mode) */
5601 * As soon as we have written the PID file, we can switch
5602 * to the user and group ID indicated by the --user option
5604 if (pidfile != NULL)
5606 write_pid_file(pidfile);
5610 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
5612 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
5616 if (setgroups(1, &grp->gr_gid))
5618 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
5621 else if (initgroups(pw->pw_name, pw->pw_gid))
5623 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
5629 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
5631 /* Read the time zone file from /etc before doing chroot. */
5633 if (NULL != pre_chroot_nslookup_to_load_resolver
5634 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
5636 /* Initialize resolver library. */
5637 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
5639 if (chroot(pw->pw_dir) < 0)
5641 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
5645 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
5648 if (setuid(pw->pw_uid))
5650 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
5654 char putenv_dummy[64];
5656 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
5657 if (putenv(putenv_dummy) != 0)
5659 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
5662 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
5663 if (putenv(putenv_dummy) != 0)
5665 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
5671 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
5674 #endif /* defined unix */
5677 /* This will be FALSE unless the command line specified --service
5681 /* Yup, so now we must attempt to establish a connection
5682 * with the service dispatcher. This will only work if this
5683 * process was launched by the service control manager to
5684 * actually run as a service. If this isn't the case, i've
5685 * known it take around 30 seconds or so for the call to return.
5688 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
5689 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
5691 /* Service has run, and at this point is now being stopped, so just return */
5696 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
5698 /* An error occurred. Usually it's because --service was wrongly specified
5699 * and we were unable to connect to the Service Control Dispatcher because
5700 * it wasn't expecting us and is therefore not listening.
5702 * For now, just continue below to call the listen_loop function.
5705 #endif /* def _WIN32 */
5715 /*********************************************************************
5717 * Function : bind_port_helper
5719 * Description : Bind the listen port. Handles logging, and aborts
5723 * 1 : haddr = Host address to bind to. Use NULL to bind to
5725 * 2 : hport = Specifies port to bind to.
5726 * 3 : backlog = Listen backlog.
5728 * Returns : Port that was opened.
5730 *********************************************************************/
5731 static jb_socket bind_port_helper(const char *haddr, int hport, int backlog)
5736 result = bind_port(haddr, hport, backlog, &bfd);
5740 const char *bind_address = (NULL != haddr) ? haddr : "INADDR_ANY";
5744 log_error(LOG_LEVEL_FATAL,
5745 "can't bind to %s:%d: There may be another Privoxy "
5746 "or some other proxy running on port %d",
5747 bind_address, hport, hport);
5750 log_error(LOG_LEVEL_FATAL,
5751 "can't bind to %s:%d: The hostname is not resolvable",
5752 bind_address, hport);
5755 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: %E",
5756 bind_address, hport);
5759 /* shouldn't get here */
5760 return JB_INVALID_SOCKET;
5765 if (bfd >= FD_SETSIZE)
5767 log_error(LOG_LEVEL_FATAL,
5768 "Bind socket number too high to use select(): %d >= %d",
5776 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
5781 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
5789 /*********************************************************************
5791 * Function : bind_ports_helper
5793 * Description : Bind the listen ports. Handles logging, and aborts
5797 * 1 : config = Privoxy configuration. Specifies ports
5799 * 2 : sockets = Preallocated array of opened sockets
5800 * corresponding to specification in config.
5801 * All non-opened sockets will be set to
5802 * JB_INVALID_SOCKET.
5804 * Returns : Nothing. Inspect sockets argument.
5806 *********************************************************************/
5807 static void bind_ports_helper(struct configuration_spec * config,
5808 jb_socket sockets[])
5812 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
5814 if (config->hport[i])
5816 sockets[i] = bind_port_helper(config->haddr[i],
5817 config->hport[i], config->listen_backlog);
5818 #if defined(FEATURE_ACCEPT_FILTER) && defined(SO_ACCEPTFILTER)
5819 if (config->enable_accept_filter && sockets[i] != JB_INVALID_SOCKET)
5821 struct accept_filter_arg af_options;
5822 bzero(&af_options, sizeof(af_options));
5823 strlcpy(af_options.af_name, "httpready", sizeof(af_options.af_name));
5824 if (setsockopt(sockets[i], SOL_SOCKET, SO_ACCEPTFILTER, &af_options,
5825 sizeof(af_options)))
5827 log_error(LOG_LEVEL_ERROR,
5828 "Enabling accept filter for socket %d failed: %E", sockets[i]);
5835 sockets[i] = JB_INVALID_SOCKET;
5838 config->need_bind = 0;
5842 /*********************************************************************
5844 * Function : close_ports_helper
5846 * Description : Close listenings ports.
5849 * 1 : sockets = Array of opened and non-opened sockets to
5850 * close. All sockets will be set to
5851 * JB_INVALID_SOCKET.
5853 * Returns : Nothing.
5855 *********************************************************************/
5856 static void close_ports_helper(jb_socket sockets[])
5860 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
5862 if (JB_INVALID_SOCKET != sockets[i])
5864 close_socket(sockets[i]);
5866 sockets[i] = JB_INVALID_SOCKET;
5872 /* Without this simple workaround we get this compiler warning from _beginthread
5873 * warning C4028: formal parameter 1 different from declaration
5875 void w32_service_listen_loop(void *p)
5879 #endif /* def _WIN32 */
5882 /*********************************************************************
5884 * Function : listen_loop
5886 * Description : bind the listen port and enter a "FOREVER" listening loop.
5892 *********************************************************************/
5893 static void listen_loop(void)
5895 struct client_states *csp_list = NULL;
5896 struct client_state *csp = NULL;
5897 jb_socket bfds[MAX_LISTENING_SOCKETS];
5898 struct configuration_spec *config;
5899 unsigned int active_threads = 0;
5900 #if defined(FEATURE_PTHREAD)
5901 pthread_attr_t attrs;
5903 pthread_attr_init(&attrs);
5904 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
5907 config = load_config();
5909 #ifdef FEATURE_CONNECTION_SHARING
5911 * XXX: Should be relocated once it no
5912 * longer needs to emit log messages.
5914 initialize_reusable_connections();
5915 #endif /* def FEATURE_CONNECTION_SHARING */
5917 bind_ports_helper(config, bfds);
5919 #ifdef FEATURE_GRACEFUL_TERMINATION
5920 while (!g_terminate)
5925 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__)
5926 while (waitpid(-1, NULL, WNOHANG) > 0)
5928 /* zombie children */
5930 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) */
5933 * Free data that was used by died threads
5935 active_threads = sweep();
5939 * Re-open the errlog after HUP signal
5941 if (received_hup_signal)
5943 if (NULL != config->logfile)
5945 init_error_log(Argv[0], config->logfile);
5947 received_hup_signal = 0;
5951 csp_list = zalloc_or_die(sizeof(*csp_list));
5952 csp = &csp_list->csp;
5954 log_error(LOG_LEVEL_CONNECT,
5955 "Waiting for the next client connection. Currently active threads: %u",
5959 * This config may be outdated, but for accept_connection()
5960 * it's fresh enough.
5962 csp->config = config;
5964 if (!accept_connection(csp, bfds))
5966 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
5971 csp->flags |= CSP_FLAG_ACTIVE;
5972 csp->server_connection.sfd = JB_INVALID_SOCKET;
5974 csp->config = config = load_config();
5976 if (config->need_bind)
5979 * Since we were listening to the "old port", we will not see
5980 * a "listen" param change until the next request. So, at
5981 * least 1 more request must be made for us to find the new
5982 * setting. I am simply closing the old socket and binding the
5985 * Which-ever is correct, we will serve 1 more page via the
5986 * old settings. This should probably be a "show-status"
5987 * request. This should not be a so common of an operation
5988 * that this will hurt people's feelings.
5991 close_ports_helper(bfds);
5993 bind_ports_helper(config, bfds);
5996 #ifdef FEATURE_TOGGLE
5997 if (global_toggle_state)
5998 #endif /* def FEATURE_TOGGLE */
6000 csp->flags |= CSP_FLAG_TOGGLED_ON;
6003 if (run_loader(csp))
6005 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
6006 /* Never get here - LOG_LEVEL_FATAL causes program exit */
6010 if (block_acl(NULL,csp))
6012 log_error(LOG_LEVEL_CONNECT,
6013 "Connection from %s on %s (socket %d) dropped due to ACL",
6014 csp->ip_addr_str, csp->listen_addr_str, csp->cfd);
6015 close_socket(csp->cfd);
6016 freez(csp->ip_addr_str);
6017 freez(csp->listen_addr_str);
6021 #endif /* def FEATURE_ACL */
6023 if ((0 != config->max_client_connections)
6024 && (active_threads >= config->max_client_connections))
6026 log_error(LOG_LEVEL_CONNECT,
6027 "Rejecting connection from %s. Maximum number of connections reached.",
6029 write_socket_delayed(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
6030 strlen(TOO_MANY_CONNECTIONS_RESPONSE), get_write_delay(csp));
6031 close_socket(csp->cfd);
6032 freez(csp->ip_addr_str);
6033 freez(csp->listen_addr_str);
6038 /* add it to the list of clients */
6039 csp_list->next = clients->next;
6040 clients->next = csp_list;
6042 if (config->multi_threaded)
6046 /* this is a switch () statement in the C preprocessor - ugh */
6047 #undef SELECTED_ONE_OPTION
6049 /* Use Pthreads in preference to native code */
6050 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
6051 #define SELECTED_ONE_OPTION
6053 pthread_t the_thread;
6056 ret = pthread_create(&the_thread, &attrs,
6057 (void * (*)(void *))serve, csp);
6058 child_id = ret ? -1 : 0;
6062 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
6063 #define SELECTED_ONE_OPTION
6064 child_id = _beginthread(
6065 (void (*)(void *))serve,
6070 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
6071 #define SELECTED_ONE_OPTION
6073 thread_id tid = spawn_thread
6074 (server_thread, "server", B_NORMAL_PRIORITY, csp);
6076 if ((tid >= 0) && (resume_thread(tid) == B_OK))
6078 child_id = (int) tid;
6087 #if !defined(SELECTED_ONE_OPTION)
6090 /* This block is only needed when using fork().
6091 * When using threads, the server thread was
6092 * created and run by the call to _beginthread().
6094 if (child_id == 0) /* child */
6097 #ifdef FEATURE_TOGGLE
6098 int inherited_toggle_state = global_toggle_state;
6099 #endif /* def FEATURE_TOGGLE */
6104 * If we've been toggled or we've blocked the request, tell Mom
6107 #ifdef FEATURE_TOGGLE
6108 if (inherited_toggle_state != global_toggle_state)
6110 rc |= RC_FLAG_TOGGLED;
6112 #endif /* def FEATURE_TOGGLE */
6114 #ifdef FEATURE_STATISTICS
6115 if (csp->flags & CSP_FLAG_REJECTED)
6117 rc |= RC_FLAG_BLOCKED;
6119 #endif /* ndef FEATURE_STATISTICS */
6123 else if (child_id > 0) /* parent */
6125 /* in a fork()'d environment, the parent's
6126 * copy of the client socket and the CSP
6130 #if !defined(_WIN32) && !defined(__CYGWIN__)
6132 wait(&child_status);
6135 * Evaluate child's return code: If the child has
6136 * - been toggled, toggle ourselves
6137 * - blocked its request, bump up the stats counter
6140 #ifdef FEATURE_TOGGLE
6141 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
6143 global_toggle_state = !global_toggle_state;
6145 #endif /* def FEATURE_TOGGLE */
6147 #ifdef FEATURE_STATISTICS
6149 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
6153 #endif /* def FEATURE_STATISTICS */
6155 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
6156 close_socket(csp->cfd);
6157 csp->flags &= ~CSP_FLAG_ACTIVE;
6161 #undef SELECTED_ONE_OPTION
6162 /* end of cpp switch () */
6167 * Spawning the child failed, assume it's because
6168 * there are too many children running already.
6169 * XXX: If you assume ...
6171 log_error(LOG_LEVEL_ERROR,
6172 "Unable to take any additional connections: %E. Active threads: %u",
6174 write_socket_delayed(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
6175 strlen(TOO_MANY_CONNECTIONS_RESPONSE), get_write_delay(csp));
6176 close_socket(csp->cfd);
6177 csp->flags &= ~CSP_FLAG_ACTIVE;
6186 #if defined(FEATURE_PTHREAD)
6187 pthread_attr_destroy(&attrs);
6190 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
6192 #ifdef FEATURE_GRACEFUL_TERMINATION
6194 log_error(LOG_LEVEL_INFO, "Graceful termination requested.");
6196 unload_current_config_file();
6197 unload_current_actions_file();
6198 unload_current_re_filterfile();
6199 #ifdef FEATURE_TRUST
6200 unload_current_trust_file();
6203 if (config->multi_threaded)
6210 } while ((clients->next != NULL) && (--i > 0));
6214 log_error(LOG_LEVEL_ERROR, "Graceful termination failed "
6215 "- still some live clients after 1 minute wait.");
6225 #ifdef FEATURE_HTTPS_INSPECTION
6227 * Only release TLS backed resources if there
6228 * are no active connections left.
6230 if (clients->next == NULL)
6236 log_error(LOG_LEVEL_INFO, "Exiting gracefully.");
6238 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
6239 /* Cleanup - remove taskbar icon etc. */
6244 #endif /* FEATURE_GRACEFUL_TERMINATION */