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 #ifdef FEATURE_HTTPS_INSPECTION
999 if (fwd != NULL && fwd->forward_host &&
1000 fwd->type != FORWARD_WEBSERVER && client_use_ssl(csp))
1002 *request_line = strdup("CONNECT ");
1007 *request_line = strdup(http->gpc);
1008 string_append(request_line, " ");
1011 if (fwd != NULL && fwd->forward_host && fwd->type != FORWARD_WEBSERVER)
1013 #ifdef FEATURE_HTTPS_INSPECTION
1014 if (client_use_ssl(csp))
1016 char port_string[10];
1018 string_append(request_line, http->host);
1019 snprintf(port_string, sizeof(port_string), ":%d", http->port);
1020 string_append(request_line, port_string);
1025 string_append(request_line, http->url);
1030 string_append(request_line, http->path);
1032 string_append(request_line, " ");
1033 string_append(request_line, http->version);
1035 if (*request_line == NULL)
1037 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1039 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
1043 /*********************************************************************
1045 * Function : change_request_destination
1047 * Description : Parse a (rewritten) request line and regenerate
1048 * the http request data.
1051 * 1 : csp = Current client state (buffers, headers, etc...)
1053 * Returns : Forwards the parse_http_request() return code.
1054 * Terminates in case of memory problems.
1056 *********************************************************************/
1057 static jb_err change_request_destination(struct client_state *csp)
1059 struct http_request *http = csp->http;
1062 log_error(LOG_LEVEL_REDIRECTS, "Rewrite detected: %s",
1063 csp->headers->first->str);
1064 free_http_request(http);
1065 err = parse_http_request(csp->headers->first->str, http);
1066 if (JB_ERR_OK != err)
1068 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
1069 jb_err_to_string(err));
1071 if (http->ssl && strcmpic(csp->http->gpc, "CONNECT"))
1074 * A client header filter changed the request URL from
1075 * http:// to https:// which we currently don't support.
1077 log_error(LOG_LEVEL_ERROR, "Changing the request destination from http "
1078 "to https behind the client's back currently isn't supported.");
1079 return JB_ERR_PARSE;
1086 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1087 /*********************************************************************
1089 * Function : server_response_is_complete
1091 * Description : Determines whether we should stop reading
1092 * from the server socket.
1095 * 1 : csp = Current client state (buffers, headers, etc...)
1096 * 2 : content_length = Length of content received so far.
1098 * Returns : TRUE if the response is complete,
1101 *********************************************************************/
1102 static int server_response_is_complete(struct client_state *csp,
1103 unsigned long long content_length)
1105 int content_length_known = !!(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
1107 if (!strcmpic(csp->http->gpc, "HEAD"))
1110 * "HEAD" implies no body, we are thus expecting
1111 * no content. XXX: incomplete "list" of methods?
1113 csp->expected_content_length = 0;
1114 content_length_known = TRUE;
1115 csp->flags |= CSP_FLAG_SERVER_CONTENT_LENGTH_SET;
1118 if (csp->http->status == 204 || csp->http->status == 304)
1121 * Expect no body. XXX: incomplete "list" of status codes?
1123 csp->expected_content_length = 0;
1124 content_length_known = TRUE;
1125 csp->flags |= CSP_FLAG_SERVER_CONTENT_LENGTH_SET;
1128 return (content_length_known && ((0 == csp->expected_content_length)
1129 || (csp->expected_content_length <= content_length)));
1133 #ifdef FEATURE_CONNECTION_SHARING
1134 /*********************************************************************
1136 * Function : wait_for_alive_connections
1138 * Description : Waits for alive connections to timeout.
1144 *********************************************************************/
1145 static void wait_for_alive_connections(void)
1147 int connections_alive = close_unusable_connections();
1149 while (0 < connections_alive)
1151 log_error(LOG_LEVEL_CONNECT,
1152 "Waiting for %d connections to timeout.",
1155 connections_alive = close_unusable_connections();
1158 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
1161 #endif /* def FEATURE_CONNECTION_SHARING */
1164 /*********************************************************************
1166 * Function : save_connection_destination
1168 * Description : Remembers a connection for reuse later on.
1171 * 1 : sfd = Open socket to remember.
1172 * 2 : http = The destination for the connection.
1173 * 3 : fwd = The forwarder settings used.
1174 * 4 : server_connection = storage.
1178 *********************************************************************/
1179 static void save_connection_destination(jb_socket sfd,
1180 const struct http_request *http,
1181 const struct forward_spec *fwd,
1182 struct reusable_connection *server_connection)
1184 assert(sfd != JB_INVALID_SOCKET);
1185 assert(NULL != http->host);
1187 server_connection->sfd = sfd;
1188 server_connection->host = strdup_or_die(http->host);
1189 server_connection->port = http->port;
1191 assert(NULL != fwd);
1192 assert(server_connection->gateway_host == NULL);
1193 assert(server_connection->gateway_port == 0);
1194 assert(server_connection->forwarder_type == 0);
1195 assert(server_connection->forward_host == NULL);
1196 assert(server_connection->forward_port == 0);
1198 server_connection->forwarder_type = fwd->type;
1199 if (NULL != fwd->gateway_host)
1201 server_connection->gateway_host = strdup_or_die(fwd->gateway_host);
1205 server_connection->gateway_host = NULL;
1207 server_connection->gateway_port = fwd->gateway_port;
1208 if (NULL != fwd->auth_username)
1210 server_connection->auth_username = strdup_or_die(fwd->auth_username);
1214 server_connection->auth_username = NULL;
1216 if (NULL != fwd->auth_password)
1218 server_connection->auth_password = strdup_or_die(fwd->auth_password);
1222 server_connection->auth_password = NULL;
1225 if (NULL != fwd->forward_host)
1227 server_connection->forward_host = strdup_or_die(fwd->forward_host);
1231 server_connection->forward_host = NULL;
1233 server_connection->forward_port = fwd->forward_port;
1235 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1238 /*********************************************************************
1240 * Function : verify_request_length
1242 * Description : Checks if we already got the whole client requests
1243 * and sets CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ if
1246 * Data that doesn't belong to the current request is
1247 * either thrown away to let the client retry on a clean
1248 * socket, or stashed to be dealt with after the current
1249 * request is served.
1252 * 1 : csp = Current client state (buffers, headers, etc...)
1256 *********************************************************************/
1257 static void verify_request_length(struct client_state *csp)
1259 unsigned long long buffered_request_bytes =
1260 (unsigned long long)(csp->client_iob->eod - csp->client_iob->cur);
1262 if ((csp->expected_client_content_length != 0)
1263 && (buffered_request_bytes != 0))
1265 if (csp->expected_client_content_length >= buffered_request_bytes)
1267 csp->expected_client_content_length -= buffered_request_bytes;
1268 log_error(LOG_LEVEL_CONNECT, "Reduced expected bytes to %llu "
1269 "to account for the %llu ones we already got.",
1270 csp->expected_client_content_length, buffered_request_bytes);
1274 assert(csp->client_iob->eod > csp->client_iob->cur + csp->expected_client_content_length);
1275 csp->client_iob->eod = csp->client_iob->cur + csp->expected_client_content_length;
1276 log_error(LOG_LEVEL_CONNECT, "Reducing expected bytes to 0. "
1277 "Marking the server socket tainted after throwing %llu bytes away.",
1278 buffered_request_bytes - csp->expected_client_content_length);
1279 csp->expected_client_content_length = 0;
1280 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1283 if (csp->expected_client_content_length == 0)
1285 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1289 if (!(csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ)
1290 && ((csp->client_iob->cur < csp->client_iob->eod)
1291 || (csp->expected_client_content_length != 0)))
1293 if (strcmpic(csp->http->gpc, "GET")
1294 && strcmpic(csp->http->gpc, "HEAD")
1295 && strcmpic(csp->http->gpc, "TRACE")
1296 && strcmpic(csp->http->gpc, "OPTIONS")
1297 && strcmpic(csp->http->gpc, "DELETE"))
1299 /* XXX: this is an incomplete hack */
1300 csp->flags &= ~CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1301 log_error(LOG_LEVEL_CONNECT, "There better be a request body.");
1305 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1307 if ((csp->config->feature_flags & RUNTIME_FEATURE_TOLERATE_PIPELINING) == 0)
1309 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1310 log_error(LOG_LEVEL_CONNECT,
1311 "Possible pipeline attempt detected. The connection will not "
1312 "be kept alive and we will only serve the first request.");
1313 /* Nuke the pipelined requests from orbit, just to be sure. */
1314 clear_iob(csp->client_iob);
1319 * Keep the pipelined data around for now, we'll deal with
1320 * it once we're done serving the current request.
1322 csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
1323 assert(csp->client_iob->eod >= csp->client_iob->cur);
1324 log_error(LOG_LEVEL_CONNECT, "Complete client request followed by "
1325 "%d bytes of pipelined data received.",
1326 (int)(csp->client_iob->eod - csp->client_iob->cur));
1332 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1333 log_error(LOG_LEVEL_CONNECT, "Complete client request received.");
1338 /*********************************************************************
1340 * Function : mark_server_socket_tainted
1342 * Description : Makes sure we don't reuse a server socket
1343 * (if we didn't read everything the server sent
1344 * us reusing the socket would lead to garbage).
1347 * 1 : csp = Current client state (buffers, headers, etc...)
1351 *********************************************************************/
1352 static void mark_server_socket_tainted(struct client_state *csp)
1355 * For consistency we always mark the server socket
1356 * tainted, however, to reduce the log noise we only
1357 * emit a log message if the server socket could have
1358 * actually been reused.
1360 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
1361 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED))
1363 log_error(LOG_LEVEL_CONNECT,
1364 "Marking the server socket %d tainted.",
1365 csp->server_connection.sfd);
1367 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1370 /*********************************************************************
1372 * Function : get_request_line
1374 * Description : Read the client request line.
1377 * 1 : csp = Current client state (buffers, headers, etc...)
1379 * Returns : Pointer to request line or NULL in case of errors.
1381 *********************************************************************/
1382 static char *get_request_line(struct client_state *csp)
1384 char buf[BUFFER_SIZE];
1385 char *request_line = NULL;
1388 memset(buf, 0, sizeof(buf));
1390 if ((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) != 0)
1393 * If there are multiple pipelined requests waiting,
1394 * the flag will be set again once the next request
1397 csp->flags &= ~CSP_FLAG_PIPELINED_REQUEST_WAITING;
1399 request_line = get_header(csp->client_iob);
1400 if ((NULL != request_line) && ('\0' != *request_line))
1402 return request_line;
1406 log_error(LOG_LEVEL_CONNECT, "No complete request line "
1407 "received yet. Continuing reading from %d.", csp->cfd);
1415 0 == (csp->flags & CSP_FLAG_FUZZED_INPUT) &&
1417 !data_is_available(csp->cfd, csp->config->socket_timeout)
1420 if (socket_is_still_alive(csp->cfd))
1422 log_error(LOG_LEVEL_CONNECT,
1423 "No request line on socket %d received in time. Timeout: %d.",
1424 csp->cfd, csp->config->socket_timeout);
1425 write_socket_delayed(csp->cfd, CLIENT_CONNECTION_TIMEOUT_RESPONSE,
1426 strlen(CLIENT_CONNECTION_TIMEOUT_RESPONSE),
1427 get_write_delay(csp));
1431 log_error(LOG_LEVEL_CONNECT,
1432 "The client side of the connection on socket %d got "
1433 "closed without sending a complete request line.", csp->cfd);
1438 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1440 if (len <= 0) return NULL;
1443 * If there is no memory left for buffering the
1444 * request, there is nothing we can do but hang up
1446 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
1451 request_line = get_header(csp->client_iob);
1453 } while ((NULL != request_line) && ('\0' == *request_line));
1455 return request_line;
1461 CHUNK_STATUS_MISSING_DATA,
1462 CHUNK_STATUS_BODY_COMPLETE,
1463 CHUNK_STATUS_PARSE_ERROR
1467 /*********************************************************************
1469 * Function : chunked_body_is_complete
1471 * Description : Figures out whether or not a chunked body is complete.
1473 * Currently it always starts at the beginning of the
1474 * buffer which is somewhat wasteful and prevents Privoxy
1475 * from starting to forward the correctly parsed chunks
1476 * as soon as theoretically possible.
1478 * Should be modified to work with a common buffer,
1479 * and allow the caller to skip already parsed chunks.
1481 * This would allow the function to be used for unbuffered
1482 * response bodies as well.
1485 * 1 : iob = Buffer with the body to check.
1486 * 2 : length = Length of complete body
1488 * Returns : Enum with the result of the check.
1490 *********************************************************************/
1491 static enum chunk_status chunked_body_is_complete(struct iob *iob, size_t *length)
1493 unsigned int chunksize;
1499 * We need at least a single digit, followed by "\r\n",
1500 * followed by an unknown amount of data, followed by "\r\n".
1502 if (p + 5 > iob->eod)
1504 return CHUNK_STATUS_MISSING_DATA;
1506 if (sscanf(p, "%x", &chunksize) != 1)
1508 return CHUNK_STATUS_PARSE_ERROR;
1512 * We want at least a single digit, followed by "\r\n",
1513 * followed by the specified amount of data, followed by "\r\n".
1515 if (p + chunksize + 5 > iob->eod)
1517 return CHUNK_STATUS_MISSING_DATA;
1520 /* Skip chunk-size. */
1521 p = strstr(p, "\r\n");
1524 return CHUNK_STATUS_PARSE_ERROR;
1526 /* Move beyond the chunkdata. */
1529 /* Make sure we're still within the buffer and have two bytes left */
1530 if (p + 2 > iob->eod)
1532 return CHUNK_STATUS_MISSING_DATA;
1535 /* There should be another "\r\n" to skip */
1536 if (memcmp(p, "\r\n", 2))
1538 return CHUNK_STATUS_PARSE_ERROR;
1541 } while (chunksize > 0U);
1543 *length = (size_t)(p - iob->cur);
1544 assert(*length <= (size_t)(iob->eod - iob->cur));
1545 assert(p <= iob->eod);
1547 return CHUNK_STATUS_BODY_COMPLETE;
1552 /*********************************************************************
1554 * Function : receive_chunked_client_request_body
1556 * Description : Read the chunk-encoded client request body.
1557 * Failures are dealt with.
1560 * 1 : csp = Current client state (buffers, headers, etc...)
1562 * Returns : JB_ERR_OK or JB_ERR_PARSE
1564 *********************************************************************/
1565 static jb_err receive_chunked_client_request_body(struct client_state *csp)
1568 enum chunk_status status;
1570 while (CHUNK_STATUS_MISSING_DATA ==
1571 (status = chunked_body_is_complete(csp->client_iob, &body_length)))
1573 char buf[BUFFER_SIZE];
1576 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1578 log_error(LOG_LEVEL_ERROR,
1579 "Timeout while waiting for the client body.");
1582 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1585 log_error(LOG_LEVEL_ERROR,
1586 "Reading the client body failed: %E");
1589 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
1594 if (status != CHUNK_STATUS_BODY_COMPLETE)
1596 write_socket_delayed(csp->cfd, CLIENT_BODY_PARSE_ERROR_RESPONSE,
1597 strlen(CLIENT_BODY_PARSE_ERROR_RESPONSE), get_write_delay(csp));
1598 log_error(LOG_LEVEL_CLF,
1599 "%s - - [%T] \"Failed reading chunked client body\" 400 0", csp->ip_addr_str);
1600 return JB_ERR_PARSE;
1602 log_error(LOG_LEVEL_CONNECT,
1603 "Chunked client body completely read. Length: %lu", body_length);
1604 csp->expected_client_content_length = body_length;
1612 /*********************************************************************
1614 * Function : fuzz_chunked_transfer_encoding
1616 * Description : Treat the fuzzed input as chunked transfer encoding
1617 * to check and dechunk.
1620 * 1 : csp = Used to store the data.
1621 * 2 : fuzz_input_file = File to read the input from.
1623 * Returns : Result of dechunking
1625 *********************************************************************/
1626 extern int fuzz_chunked_transfer_encoding(struct client_state *csp, char *fuzz_input_file)
1629 size_t size = (size_t)(csp->iob->eod - csp->iob->cur);
1630 enum chunk_status status;
1632 status = chunked_body_is_complete(csp->iob, &length);
1633 if (CHUNK_STATUS_BODY_COMPLETE != status)
1635 log_error(LOG_LEVEL_INFO, "Chunked body is incomplete or invalid");
1638 return (JB_ERR_OK == remove_chunked_transfer_coding(csp->iob->cur, &size));
1643 /*********************************************************************
1645 * Function : fuzz_client_request
1647 * Description : Try to get a client request from the fuzzed input.
1650 * 1 : csp = Current client state (buffers, headers, etc...)
1651 * 2 : fuzz_input_file = File to read the input from.
1653 * Returns : Result of fuzzing.
1655 *********************************************************************/
1656 extern int fuzz_client_request(struct client_state *csp, char *fuzz_input_file)
1661 csp->ip_addr_str = "fuzzer";
1663 if (strcmp(fuzz_input_file, "-") != 0)
1665 log_error(LOG_LEVEL_FATAL,
1666 "Fuzzed client requests can currently only be read from stdin (-).");
1668 err = receive_client_request(csp);
1669 if (err != JB_ERR_OK)
1673 err = parse_client_request(csp);
1674 if (err != JB_ERR_OK)
1682 #endif /* def FUZZ */
1685 #ifdef FEATURE_FORCE_LOAD
1686 /*********************************************************************
1688 * Function : force_required
1690 * Description : Checks a request line to see if it contains
1691 * the FORCE_PREFIX. If it does, it is removed
1692 * unless enforcing requests has beend disabled.
1695 * 1 : request_line = HTTP request line
1697 * Returns : TRUE if force is required, FALSE otherwise.
1699 *********************************************************************/
1700 static int force_required(const struct client_state *csp, char *request_line)
1704 p = strstr(request_line, "http://");
1708 p += strlen("http://");
1712 /* Intercepted request usually don't specify the protocol. */
1716 /* Go to the beginning of the path */
1721 * If the path is missing the request line is invalid and we
1722 * are done here. The client-visible rejection happens later on.
1727 if (0 == strncmpic(p, FORCE_PREFIX, strlen(FORCE_PREFIX) - 1))
1729 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS))
1731 /* XXX: Should clean more carefully */
1732 strclean(request_line, FORCE_PREFIX);
1733 log_error(LOG_LEVEL_FORCE,
1734 "Enforcing request: \"%s\".", request_line);
1738 log_error(LOG_LEVEL_FORCE,
1739 "Ignored force prefix in request: \"%s\".", request_line);
1745 #endif /* def FEATURE_FORCE_LOAD */
1748 /*********************************************************************
1750 * Function : receive_client_request
1752 * Description : Read the client's request (more precisely the
1753 * client headers) and answer it if necessary.
1756 * 1 : csp = Current client state (buffers, headers, etc...)
1758 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
1760 *********************************************************************/
1761 static jb_err receive_client_request(struct client_state *csp)
1763 char buf[BUFFER_SIZE];
1766 struct http_request *http;
1770 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1771 struct list header_list;
1772 struct list *headers = &header_list;
1774 /* We don't care if the arriving data is a valid HTTP request or not. */
1775 csp->requests_received_total++;
1779 memset(buf, 0, sizeof(buf));
1781 req = get_request_line(csp);
1784 mark_server_socket_tainted(csp);
1785 return JB_ERR_PARSE;
1787 assert(*req != '\0');
1789 if (client_protocol_is_unsupported(csp, req))
1791 return JB_ERR_PARSE;
1794 #ifdef FEATURE_FORCE_LOAD
1795 if (force_required(csp, req))
1797 csp->flags |= CSP_FLAG_FORCED;
1799 #endif /* def FEATURE_FORCE_LOAD */
1801 err = parse_http_request(req, http);
1803 if (JB_ERR_OK != err)
1805 write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER),
1806 get_write_delay(csp));
1807 /* XXX: Use correct size */
1808 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1809 log_error(LOG_LEVEL_ERROR,
1810 "Couldn't parse request line received from %s: %s",
1811 csp->ip_addr_str, jb_err_to_string(err));
1813 free_http_request(http);
1814 return JB_ERR_PARSE;
1817 /* grab the rest of the client's headers */
1821 p = get_header(csp->client_iob);
1825 /* There are no additional headers to read. */
1832 * We didn't receive a complete header
1833 * line yet, get the rest of it.
1835 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1837 log_error(LOG_LEVEL_ERROR,
1838 "Stopped grabbing the client headers.");
1839 destroy_list(headers);
1840 return JB_ERR_PARSE;
1843 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1846 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1847 destroy_list(headers);
1848 return JB_ERR_PARSE;
1851 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
1854 * If there is no memory left for buffering the
1855 * request, there is nothing we can do but hang up
1857 destroy_list(headers);
1858 return JB_ERR_MEMORY;
1863 if (!strncmpic(p, "Transfer-Encoding:", 18))
1866 * XXX: should be called through sed()
1867 * but currently can't.
1869 client_transfer_encoding(csp, &p);
1872 * We were able to read a complete
1873 * header and can finally enlist it.
1880 if (http->host == NULL)
1883 * If we still don't know the request destination,
1884 * the request is invalid or the client uses
1885 * Privoxy without its knowledge.
1887 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1890 * Our attempts to get the request destination
1891 * elsewhere failed or Privoxy is configured
1892 * to only accept proxy requests.
1894 * An error response has already been sent
1895 * and we're done here.
1897 return JB_ERR_PARSE;
1901 #ifdef FEATURE_CLIENT_TAGS
1902 /* XXX: If the headers were enlisted sooner, passing csp would do. */
1903 set_client_address(csp, headers);
1904 get_tag_list_for_client(csp->client_tags, csp->client_address);
1908 * Determine the actions for this URL
1910 #ifdef FEATURE_TOGGLE
1911 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1913 /* Most compatible set of actions (i.e. none) */
1914 init_current_action(csp->action);
1917 #endif /* ndef FEATURE_TOGGLE */
1919 get_url_actions(csp, http);
1922 enlist(csp->headers, http->cmd);
1924 /* Append the previously read headers */
1925 err = list_append_list_unique(csp->headers, headers);
1926 destroy_list(headers);
1933 /*********************************************************************
1935 * Function : parse_client_request
1937 * Description : Parses the client's request and decides what to do
1940 * Note that since we're not using select() we could get
1941 * blocked here if a client connected, then didn't say
1945 * 1 : csp = Current client state (buffers, headers, etc...)
1947 * Returns : JB_ERR_OK or JB_ERR_PARSE
1949 *********************************************************************/
1950 static jb_err parse_client_request(struct client_state *csp)
1952 struct http_request *http = csp->http;
1955 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1956 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
1957 && (!strcmpic(csp->http->version, "HTTP/1.1"))
1958 && (csp->http->ssl == 0))
1960 /* Assume persistence until further notice */
1961 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
1963 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1965 if (csp->http->ssl == 0)
1968 * This whole block belongs to chat() but currently
1969 * has to be executed before sed().
1971 if (csp->flags & CSP_FLAG_CHUNKED_CLIENT_BODY)
1973 if (receive_chunked_client_request_body(csp) != JB_ERR_OK)
1975 return JB_ERR_PARSE;
1980 csp->expected_client_content_length = get_expected_content_length(csp->headers);
1982 verify_request_length(csp);
1984 #ifndef FEATURE_HTTPS_INSPECTION
1987 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1991 err = sed(csp, FILTER_CLIENT_HEADERS);
1992 if (JB_ERR_OK != err)
1994 log_error(LOG_LEVEL_ERROR, "Failed to parse client request from %s.",
1996 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1997 csp->ip_addr_str, csp->http->cmd);
1998 write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER), get_write_delay(csp));
1999 return JB_ERR_PARSE;
2001 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2003 /* Check request line for rewrites. */
2004 if ((NULL == csp->headers->first->str)
2005 || (strcmp(http->cmd, csp->headers->first->str) &&
2006 (JB_ERR_OK != change_request_destination(csp))))
2009 * A header filter broke the request line - bail out.
2011 write_socket_delayed(csp->cfd, MESSED_UP_REQUEST_RESPONSE,
2012 strlen(MESSED_UP_REQUEST_RESPONSE), get_write_delay(csp));
2013 /* XXX: Use correct size */
2014 log_error(LOG_LEVEL_CLF,
2015 "%s - - [%T] \"Invalid request generated\" 400 0", csp->ip_addr_str);
2016 log_error(LOG_LEVEL_ERROR,
2017 "Invalid request line after applying header filters.");
2018 free_http_request(http);
2020 return JB_ERR_PARSE;
2023 if (client_has_unsupported_expectations(csp))
2025 return JB_ERR_PARSE;
2033 /*********************************************************************
2035 * Function : read_http_request_body
2037 * Description : Reads remaining request body from the client.
2040 * 1 : csp = Current client state (buffers, headers, etc...)
2042 * Returns : 0 on success, anything else is an error.
2044 *********************************************************************/
2045 static int read_http_request_body(struct client_state *csp)
2047 size_t to_read = csp->expected_client_content_length;
2050 assert(to_read != 0);
2052 /* check if all data has been already read */
2053 if (to_read <= (csp->client_iob->eod - csp->client_iob->cur))
2058 for (to_read -= (size_t)(csp->client_iob->eod - csp->client_iob->cur);
2059 to_read > 0 && data_is_available(csp->cfd, csp->config->socket_timeout);
2060 to_read -= (unsigned)len)
2062 char buf[BUFFER_SIZE];
2063 size_t max_bytes_to_read = to_read < sizeof(buf) ? to_read : sizeof(buf);
2065 log_error(LOG_LEVEL_CONNECT,
2066 "Waiting for up to %lu bytes of request body from the client.",
2068 len = read_socket(csp->cfd, buf, (int)max_bytes_to_read);
2071 log_error(LOG_LEVEL_CONNECT, "Failed receiving request body from %s: %E", csp->ip_addr_str);
2074 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, (char *)buf, len))
2078 assert(to_read >= len);
2083 log_error(LOG_LEVEL_CONNECT,
2084 "Not enough request body has been read: expected %lu more bytes",
2088 log_error(LOG_LEVEL_CONNECT,
2089 "The last %d bytes of the request body have been read", len);
2094 /*********************************************************************
2096 * Function : update_client_headers
2098 * Description : Updates the HTTP headers from the client request.
2101 * 1 : csp = Current client state (buffers, headers, etc...)
2102 * 2 : new_content_length = new content length value to set
2104 * Returns : 0 on success, anything else is an error.
2106 *********************************************************************/
2107 static int update_client_headers(struct client_state *csp, size_t new_content_length)
2109 static const char content_length[] = "Content-Length:";
2111 struct list_entry *p;
2113 #ifndef FEATURE_HTTPS_INSPECTION
2114 for (p = csp->headers->first;
2116 for (p = csp->http->client_ssl ? csp->https_headers->first : csp->headers->first;
2118 !updated && (p != NULL); p = p->next)
2120 /* Header crunch()ed in previous run? -> ignore */
2126 /* Does the current parser handle this header? */
2127 if (0 == strncmpic(p->str, content_length, sizeof(content_length) - 1))
2129 updated = (JB_ERR_OK == header_adjust_content_length((char **)&(p->str), new_content_length));
2141 /*********************************************************************
2143 * Function : can_filter_request_body
2145 * Description : Checks if the current request body can be stored in
2146 * the client_iob without hitting buffer limit.
2149 * 1 : csp = Current client state (buffers, headers, etc...)
2151 * Returns : TRUE if the current request size do not exceed buffer limit
2154 *********************************************************************/
2155 static int can_filter_request_body(const struct client_state *csp)
2157 if (!can_add_to_iob(csp->client_iob, csp->config->buffer_limit,
2158 csp->expected_client_content_length))
2160 log_error(LOG_LEVEL_INFO,
2161 "Not filtering request body from %s: buffer limit %lu will be exceeded "
2162 "(content length %lluu)", csp->ip_addr_str, csp->config->buffer_limit,
2163 csp->expected_client_content_length);
2170 /*********************************************************************
2172 * Function : send_http_request
2174 * Description : Sends the HTTP headers from the client request
2175 * and all the body data that has already been received.
2178 * 1 : csp = Current client state (buffers, headers, etc...)
2180 * Returns : 0 on success, anything else is an error.
2182 *********************************************************************/
2183 static int send_http_request(struct client_state *csp)
2187 const char *to_send;
2189 int filter_client_body = csp->expected_client_content_length != 0 &&
2190 client_body_filters_enabled(csp->action) && can_filter_request_body(csp);
2192 if (filter_client_body)
2194 if (read_http_request_body(csp))
2198 to_send_len = csp->expected_client_content_length;
2199 to_send = execute_client_body_filters(csp, &to_send_len);
2200 if (to_send == NULL)
2202 /* just flush client_iob */
2203 filter_client_body = FALSE;
2205 else if (to_send_len != csp->expected_client_content_length &&
2206 update_client_headers(csp, to_send_len))
2208 log_error(LOG_LEVEL_HEADER, "Error updating client headers");
2211 csp->expected_client_content_length = 0;
2214 hdr = list_to_text(csp->headers);
2217 /* FIXME Should handle error properly */
2218 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2220 list_remove_all(csp->headers);
2223 * Write the client's (modified) header to the server
2224 * (along with anything else that may be in the buffer)
2226 write_failure = 0 != write_socket(csp->server_connection.sfd, hdr, strlen(hdr));
2231 log_error(LOG_LEVEL_CONNECT, "Failed sending request headers to: %s: %E",
2232 csp->http->hostport);
2236 if (filter_client_body)
2238 write_failure = 0 != write_socket(csp->server_connection.sfd, to_send, to_send_len);
2242 log_error(LOG_LEVEL_CONNECT, "Failed sending filtered request body to: %s: %E",
2243 csp->http->hostport);
2248 if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) == 0)
2249 && (flush_iob(csp->server_connection.sfd, csp->client_iob, 0) < 0))
2251 log_error(LOG_LEVEL_CONNECT, "Failed sending request body to: %s: %E",
2252 csp->http->hostport);
2259 #ifdef FEATURE_HTTPS_INSPECTION
2260 /*********************************************************************
2262 * Function : read_https_request_body
2264 * Description : Reads remaining request body from the client.
2267 * 1 : csp = Current client state (buffers, headers, etc...)
2269 * Returns : 0 on success, anything else is an error.
2271 *********************************************************************/
2272 static int read_https_request_body(struct client_state *csp)
2274 size_t to_read = csp->expected_client_content_length;
2277 assert(to_read != 0);
2279 /* check if all data has been already read */
2280 if (to_read <= (csp->client_iob->eod - csp->client_iob->cur))
2285 for (to_read -= (size_t)(csp->client_iob->eod - csp->client_iob->cur);
2286 to_read > 0 && (is_ssl_pending(&(csp->ssl_client_attr)) ||
2287 data_is_available(csp->cfd, csp->config->socket_timeout));
2288 to_read -= (unsigned)len)
2290 unsigned char buf[BUFFER_SIZE];
2291 size_t max_bytes_to_read = to_read < sizeof(buf) ? to_read : sizeof(buf);
2293 log_error(LOG_LEVEL_CONNECT,
2294 "Waiting for up to %lu bytes of request body from the client.",
2296 len = ssl_recv_data(&(csp->ssl_client_attr), buf,
2297 (unsigned)max_bytes_to_read);
2300 log_error(LOG_LEVEL_CONNECT, "Failed receiving request body from %s", csp->ip_addr_str);
2303 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, (char *)buf, len))
2307 assert(to_read >= len);
2312 log_error(LOG_LEVEL_CONNECT,
2313 "Not enough request body has been read: expected %lu more bytes",
2318 log_error(LOG_LEVEL_CONNECT,
2319 "The last %llu bytes of the request body have been read",
2320 csp->expected_client_content_length);
2325 /*********************************************************************
2327 * Function : receive_and_send_encrypted_post_data
2329 * Description : Reads remaining request body from the client and sends
2333 * 1 : csp = Current client state (buffers, headers, etc...)
2335 * Returns : 0 on success, anything else is an error.
2337 *********************************************************************/
2338 static int receive_and_send_encrypted_post_data(struct client_state *csp)
2340 int content_length_known = csp->expected_client_content_length != 0;
2342 while (is_ssl_pending(&(csp->ssl_client_attr))
2343 || (content_length_known && csp->expected_client_content_length != 0))
2345 unsigned char buf[BUFFER_SIZE];
2347 int max_bytes_to_read = sizeof(buf);
2349 if (content_length_known && csp->expected_client_content_length < sizeof(buf))
2351 max_bytes_to_read = (int)csp->expected_client_content_length;
2353 log_error(LOG_LEVEL_CONNECT,
2354 "Waiting for up to %d bytes of request body from the client.",
2356 len = ssl_recv_data(&(csp->ssl_client_attr), buf,
2357 (unsigned)max_bytes_to_read);
2364 /* XXX: Does this actually happen? */
2367 log_error(LOG_LEVEL_CONNECT, "Forwarding %d bytes of encrypted request body",
2369 len = ssl_send_data(&(csp->ssl_server_attr), buf, (size_t)len);
2374 if (csp->expected_client_content_length != 0)
2376 if (csp->expected_client_content_length >= len)
2378 csp->expected_client_content_length -= (unsigned)len;
2380 if (csp->expected_client_content_length == 0)
2382 log_error(LOG_LEVEL_CONNECT, "Forwarded the last %d bytes", len);
2388 log_error(LOG_LEVEL_CONNECT, "Done forwarding encrypted request body");
2395 /*********************************************************************
2397 * Function : send_https_request
2399 * Description : Sends the HTTP headers from the client request
2400 * and all the body data that has already been received.
2403 * 1 : csp = Current client state (buffers, headers, etc...)
2405 * Returns : 0 on success, anything else is an error.
2407 *********************************************************************/
2408 static int send_https_request(struct client_state *csp)
2413 const char *to_send;
2415 int filter_client_body = csp->expected_client_content_length != 0 &&
2416 client_body_filters_enabled(csp->action) && can_filter_request_body(csp);
2418 if (filter_client_body)
2420 if (read_https_request_body(csp))
2424 to_send_len = csp->expected_client_content_length;
2425 to_send = execute_client_body_filters(csp, &to_send_len);
2426 if (to_send == NULL)
2428 /* just flush client_iob */
2429 filter_client_body = FALSE;
2431 else if (to_send_len != csp->expected_client_content_length &&
2432 update_client_headers(csp, to_send_len))
2434 log_error(LOG_LEVEL_HEADER, "Error updating client headers");
2437 csp->expected_client_content_length = 0;
2440 hdr = list_to_text(csp->https_headers);
2443 /* FIXME Should handle error properly */
2444 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2446 list_remove_all(csp->https_headers);
2449 * Write the client's (modified) header to the server
2450 * (along with anything else that may be in the buffer)
2452 ret = ssl_send_data(&(csp->ssl_server_attr),
2453 (const unsigned char *)hdr, strlen(hdr));
2458 log_error(LOG_LEVEL_CONNECT,
2459 "Failed sending encrypted request headers to: %s: %E",
2460 csp->http->hostport);
2461 mark_server_socket_tainted(csp);
2465 if (filter_client_body)
2467 ret = ssl_send_data(&(csp->ssl_server_attr), (const unsigned char *)to_send, to_send_len);
2471 log_error(LOG_LEVEL_CONNECT, "Failed sending filtered request body to: %s",
2472 csp->http->hostport);
2477 if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) == 0)
2478 && ((flushed = ssl_flush_socket(&(csp->ssl_server_attr),
2479 csp->client_iob)) < 0))
2481 log_error(LOG_LEVEL_CONNECT, "Failed sending request body to: %s: %E",
2482 csp->http->hostport);
2485 if (flushed != 0 || csp->expected_client_content_length != 0)
2487 if (csp->expected_client_content_length != 0)
2489 if (csp->expected_client_content_length < flushed)
2491 log_error(LOG_LEVEL_ERROR,
2492 "Flushed %ld bytes of request body while only expecting %llu",
2493 flushed, csp->expected_client_content_length);
2494 csp->expected_client_content_length = 0;
2498 log_error(LOG_LEVEL_CONNECT,
2499 "Flushed %ld bytes of request body while expecting %llu",
2500 flushed, csp->expected_client_content_length);
2501 csp->expected_client_content_length -= (unsigned)flushed;
2502 if (receive_and_send_encrypted_post_data(csp))
2510 log_error(LOG_LEVEL_CONNECT,
2511 "Flushed %ld bytes of request body", flushed);
2515 log_error(LOG_LEVEL_CONNECT, "Encrypted request sent");
2522 /*********************************************************************
2524 * Function : receive_encrypted_request_headers
2526 * Description : Receives the encrypted request headers when
2530 * 1 : csp = Current client state (buffers, headers, etc...)
2532 * Returns : JB_ERR_OK on success,
2533 * JB_ERR_PARSE or JB_ERR_MEMORY otherwise
2535 *********************************************************************/
2536 static jb_err receive_encrypted_request_headers(struct client_state *csp)
2538 char buf[BUFFER_SIZE];
2544 log_error(LOG_LEVEL_HEADER, "Waiting for encrypted client headers");
2545 if (!is_ssl_pending(&(csp->ssl_client_attr)) &&
2546 !data_is_available(csp->cfd, csp->config->socket_timeout))
2548 log_error(LOG_LEVEL_CONNECT,
2549 "Socket %d timed out while waiting for client headers", csp->cfd);
2550 return JB_ERR_PARSE;
2552 len = ssl_recv_data(&(csp->ssl_client_attr),
2553 (unsigned char *)buf, sizeof(buf));
2556 log_error(LOG_LEVEL_CONNECT,
2557 "Socket %d closed while waiting for client headers", csp->cfd);
2558 return JB_ERR_PARSE;
2562 return JB_ERR_PARSE;
2564 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
2566 return JB_ERR_MEMORY;
2568 p = strstr(csp->client_iob->cur, "\r\n\r\n");
2569 } while (p == NULL);
2571 log_error(LOG_LEVEL_HEADER, "Encrypted headers received completely");
2577 /*********************************************************************
2579 * Function : change_encrypted_request_destination
2581 * Description : Parse a (rewritten) request line from an encrypted
2582 * request and regenerate the http request data.
2585 * 1 : csp = Current client state (buffers, headers, etc...)
2587 * Returns : Forwards the parse_http_request() return code.
2588 * Terminates in case of memory problems.
2590 *********************************************************************/
2591 static jb_err change_encrypted_request_destination(struct client_state *csp)
2594 char *original_host = csp->http->host;
2595 int original_port = csp->http->port;
2597 log_error(LOG_LEVEL_REDIRECTS, "Rewrite detected: %s",
2598 csp->https_headers->first->str);
2599 csp->http->host = NULL;
2600 free_http_request(csp->http);
2601 err = parse_http_request(csp->https_headers->first->str, csp->http);
2602 if (JB_ERR_OK != err)
2604 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2605 jb_err_to_string(err));
2606 freez(original_host);
2610 if (csp->http->host == NULL)
2612 char port_string[10];
2614 * The rewritten request line did not specify a host
2615 * which means we can use the original host specified
2618 csp->http->host = original_host;
2619 csp->http->port = original_port;
2620 log_error(LOG_LEVEL_REDIRECTS, "Keeping the original host: %s",
2623 * If the rewritten request line didn't contain a host
2624 * it also didn't contain a port so we can reuse the host
2627 freez(csp->http->hostport);
2628 csp->http->hostport = strdup_or_die(csp->http->host);
2629 snprintf(port_string, sizeof(port_string), ":%d", original_port);
2630 err = string_append(&csp->http->hostport, port_string);
2631 if (err != JB_ERR_OK)
2633 log_error(LOG_LEVEL_ERROR, "Failed to rebuild hostport: %s.",
2634 jb_err_to_string(err));
2639 * While the request line didn't mention it,
2640 * we're https-inspecting and want to speak TLS
2643 csp->http->server_ssl = 1;
2648 /* The rewrite filter added a host so we can ditch the original */
2649 freez(original_host);
2650 csp->http->server_ssl = csp->http->ssl;
2653 csp->http->client_ssl = 1;
2655 freez(csp->https_headers->first->str);
2656 build_request_line(csp, NULL, &csp->https_headers->first->str);
2658 if (!server_use_ssl(csp))
2660 log_error(LOG_LEVEL_REDIRECTS,
2661 "Rewritten request line results in downgrade to http");
2663 * Replace the unencryptd headers received with the
2664 * CONNECT request with the ones we received securely.
2666 destroy_list(csp->headers);
2667 csp->headers->first = csp->https_headers->first;
2668 csp->headers->last = csp->https_headers->last;
2669 csp->https_headers->first = NULL;
2670 csp->https_headers->last = NULL;
2678 /*********************************************************************
2680 * Function : process_encrypted_request_headers
2682 * Description : Receives and parses the encrypted headers send
2683 * by the client when https-inspecting.
2686 * 1 : csp = Current client state (buffers, headers, etc...)
2688 * Returns : JB_ERR_OK on success,
2689 * JB_ERR_PARSE or JB_ERR_MEMORY otherwise
2691 *********************************************************************/
2692 static jb_err process_encrypted_request_headers(struct client_state *csp)
2697 /* Temporary copy of the client's headers before they get enlisted in csp->https_headers */
2698 struct list header_list;
2699 struct list *headers = &header_list;
2701 assert(csp->ssl_with_client_is_opened);
2703 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2704 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
2706 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2709 err = receive_encrypted_request_headers(csp);
2710 if (err != JB_ERR_OK)
2712 if (csp->client_iob->cur == NULL ||
2713 csp->client_iob->cur == csp->client_iob->eod)
2716 * We did not receive any data, most likely because the
2717 * client is done. Don't log this as a parse failure.
2719 return JB_ERR_PARSE;
2721 /* XXX: Also used for JB_ERR_MEMORY */
2722 log_error(LOG_LEVEL_ERROR, "Failed to receive encrypted request: %s",
2723 jb_err_to_string(err));
2724 ssl_send_data_delayed(&(csp->ssl_client_attr),
2725 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2729 /* We don't need get_request_line() because the whole HTTP head is buffered. */
2730 request_line = get_header(csp->client_iob);
2731 if (request_line == NULL)
2733 log_error(LOG_LEVEL_ERROR, "Failed to get the encrypted request line");
2734 ssl_send_data_delayed(&(csp->ssl_client_attr),
2735 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2736 return JB_ERR_PARSE;
2738 assert(*request_line != '\0');
2740 if (client_protocol_is_unsupported(csp, request_line))
2743 * If the protocol is unsupported we're done here.
2744 * client_protocol_is_unsupported() took care of sending
2745 * the error response and logging the error message.
2747 return JB_ERR_PARSE;
2750 #ifdef FEATURE_FORCE_LOAD
2751 if (force_required(csp, request_line))
2753 csp->flags |= CSP_FLAG_FORCED;
2755 #endif /* def FEATURE_FORCE_LOAD */
2757 free_http_request(csp->http);
2759 err = parse_http_request(request_line, csp->http);
2760 /* XXX: Restore ssl setting. This is ugly */
2761 csp->http->client_ssl = 1;
2762 csp->http->server_ssl = 1;
2764 freez(request_line);
2765 if (JB_ERR_OK != err)
2767 ssl_send_data_delayed(&(csp->ssl_client_attr),
2768 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2769 /* XXX: Use correct size */
2770 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2771 log_error(LOG_LEVEL_ERROR,
2772 "Couldn't parse request line received from %s: %s",
2773 csp->ip_addr_str, jb_err_to_string(err));
2775 free_http_request(csp->http);
2776 return JB_ERR_PARSE;
2779 /* Parse the rest of the client's headers. */
2783 p = get_header(csp->client_iob);
2787 /* There are no additional headers to read. */
2794 if (JB_ERR_OK != get_destination_from_https_headers(headers, csp->http))
2797 * Our attempts to get the request destination
2800 log_error(LOG_LEVEL_ERROR,
2801 "Failed to get the encrypted request destination");
2802 ssl_send_data_delayed(&(csp->ssl_client_attr),
2803 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2804 return JB_ERR_PARSE;
2807 /* Split the domain we just got for pattern matching */
2808 init_domain_components(csp->http);
2810 #ifdef FEATURE_CLIENT_TAGS
2811 /* XXX: If the headers were enlisted sooner, passing csp would do. */
2812 if (csp->client_address == NULL)
2814 set_client_address(csp, headers);
2815 get_tag_list_for_client(csp->client_tags, csp->client_address);
2819 #ifdef FEATURE_TOGGLE
2820 if ((csp->flags & CSP_FLAG_TOGGLED_ON) != 0)
2824 * Determine the actions for this request after
2825 * clearing the ones from the previous one.
2827 free_current_action(csp->action);
2828 get_url_actions(csp, csp->http);
2831 enlist(csp->https_headers, csp->http->cmd);
2833 /* Append the previously read headers */
2834 err = list_append_list_unique(csp->https_headers, headers);
2835 destroy_list(headers);
2836 if (JB_ERR_OK != err)
2838 /* XXX: Send error message */
2842 /* XXX: Work around crash */
2843 csp->error_message = NULL;
2845 /* XXX: Why do this here? */
2848 err = sed_https(csp);
2849 if (JB_ERR_OK != err)
2851 ssl_send_data_delayed(&(csp->ssl_client_attr),
2852 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2853 log_error(LOG_LEVEL_ERROR, "Failed to parse client request from %s.",
2855 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
2856 csp->ip_addr_str, csp->http->cmd);
2857 return JB_ERR_PARSE;
2860 if ((NULL == csp->https_headers->first->str)
2861 || (strcmp(csp->http->cmd, csp->https_headers->first->str) &&
2862 (JB_ERR_OK != change_encrypted_request_destination(csp))))
2864 ssl_send_data_delayed(&(csp->ssl_client_attr),
2865 (const unsigned char *)MESSED_UP_REQUEST_RESPONSE,
2866 strlen(MESSED_UP_REQUEST_RESPONSE), get_write_delay(csp));
2867 log_error(LOG_LEVEL_ERROR,
2868 "Invalid request line after applying header filters.");
2869 /* XXX: Use correct size */
2870 log_error(LOG_LEVEL_CLF,
2871 "%s - - [%T] \"Invalid request generated\" 400 0", csp->ip_addr_str);
2873 return JB_ERR_PARSE;
2876 log_error(LOG_LEVEL_HEADER, "Encrypted request processed");
2877 log_error(LOG_LEVEL_REQUEST, "https://%s%s", csp->http->hostport,
2884 /*********************************************************************
2886 * Function : cgi_page_requested
2888 * Description : Checks if a request is for an internal CGI page.
2891 * 1 : host = The host requested by the client.
2893 * Returns : 1 if a CGI page has been requested, 0 otherwise
2895 *********************************************************************/
2896 static int cgi_page_requested(const char *host)
2898 if ((0 == strcmpic(host, CGI_SITE_1_HOST))
2899 || (0 == strcmpic(host, CGI_SITE_1_HOST "."))
2900 || (0 == strcmpic(host, CGI_SITE_2_HOST))
2901 || (0 == strcmpic(host, CGI_SITE_2_HOST ".")))
2911 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2912 /*********************************************************************
2914 * Function : continue_https_chat
2916 * Description : Behaves similar to chat() but only deals with
2917 * https-inspected requests that arrive on an already
2918 * established connection. The first request is always
2919 * served by chat() which is a lot more complex as it
2920 * has to deal with forwarding settings and connection
2923 * If a connection to the server has already been
2924 * opened it is reused unless the request is blocked
2925 * or the forwarder changed.
2927 * If a connection to the server has not yet been
2928 * opened (because the previous request was crunched),
2929 * or the forwarder changed, the connection is dropped
2930 * so that the client retries on a fresh one.
2933 * 1 : csp = Current client state (buffers, headers, etc...)
2935 * Returns : Nothing.
2937 *********************************************************************/
2938 static void continue_https_chat(struct client_state *csp)
2940 const struct forward_spec *fwd;
2942 if (JB_ERR_OK != process_encrypted_request_headers(csp))
2944 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2948 csp->requests_received_total++;
2951 * We have an encrypted request. Check if one of the crunchers wants it.
2953 if (crunch_response_triggered(csp, crunchers_all))
2956 * Yes. The client got the crunch response and we're done here.
2960 if (csp->ssl_with_server_is_opened == 0)
2962 log_error(LOG_LEVEL_CONNECT,
2963 "Dropping the client connection on socket %d. "
2964 "The server connection has not been established yet.",
2966 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2969 assert(csp->server_connection.sfd != JB_INVALID_SOCKET);
2971 fwd = forward_url(csp, csp->http);
2972 if (!connection_destination_matches(&csp->server_connection, csp->http, fwd))
2974 log_error(LOG_LEVEL_CONNECT,
2975 "Dropping the client connection on socket %d with "
2976 "server socket %d connected to %s. The forwarder has changed.",
2977 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
2978 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2982 log_applied_actions(csp->action);
2984 log_error(LOG_LEVEL_CONNECT,
2985 "Reusing server socket %d connected to %s. Requests already sent: %u.",
2986 csp->server_connection.sfd, csp->server_connection.host,
2987 csp->server_connection.requests_sent_total);
2989 if (send_https_request(csp))
2992 * Most likely the server connection timed out. We can't easily
2993 * create a new one so simply drop the client connection without a
2994 * error response to let the client retry.
2996 log_error(LOG_LEVEL_CONNECT,
2997 "Dropping client connection on socket %d. "
2998 "Forwarding the encrypted client request failed.",
3002 csp->server_connection.request_sent = time(NULL);
3003 csp->server_connection.requests_sent_total++;
3004 handle_established_connection(csp);
3005 freez(csp->receive_buffer);
3007 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3011 /*********************************************************************
3013 * Function : handle_established_connection
3015 * Description : Shuffle data between client and server once the
3016 * connection has been established and the request
3020 * 1 : csp = Current client state (buffers, headers, etc...)
3022 * Returns : Nothing.
3024 *********************************************************************/
3025 static void handle_established_connection(struct client_state *csp)
3031 struct pollfd poll_fds[2];
3035 struct timeval timeout;
3038 int ms_iis5_hack = 0;
3039 unsigned long long byte_count = 0;
3040 struct http_request *http;
3041 long len = 0; /* for buffer sizes (and negative error codes) */
3042 int buffer_and_filter_content = 0;
3043 unsigned int write_delay;
3044 #ifdef FEATURE_HTTPS_INSPECTION
3046 int use_ssl_tunnel = 0;
3047 csp->dont_verify_certificate = 0;
3049 if (csp->http->ssl && !(csp->action->flags & ACTION_HTTPS_INSPECTION))
3051 /* Pass encrypted content without filtering. */
3056 /* Skeleton for HTTP response, if we should intercept the request */
3057 struct http_response *rsp;
3058 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3059 int watch_client_socket;
3062 csp->receive_buffer_size = csp->config->receive_buffer_size;
3063 csp->receive_buffer = zalloc(csp->receive_buffer_size + 1);
3064 if (csp->receive_buffer == NULL)
3066 log_error(LOG_LEVEL_ERROR,
3067 "Out of memory. Failed to allocate the receive buffer.");
3068 rsp = cgi_error_memory();
3069 send_crunch_response(csp, rsp);
3076 maxfd = (csp->cfd > csp->server_connection.sfd) ?
3077 csp->cfd : csp->server_connection.sfd;
3080 /* pass data between the client and server
3081 * until one or the other shuts down the connection.
3086 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3087 watch_client_socket = 0 == (csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING);
3089 write_delay = get_write_delay(csp);
3093 #ifdef FEATURE_HTTPS_INSPECTION
3094 if (server_use_ssl(csp) && is_ssl_pending(&(csp->ssl_server_attr)))
3097 * It's possible that the TLS library already consumed all the
3098 * data the server intends to send. If that happens poll() and
3099 * select() will no longer see the data as available so we have
3100 * to skip the calls.
3102 goto server_wants_to_talk;
3107 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3108 if (!watch_client_socket)
3110 maxfd = csp->server_connection.sfd;
3113 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3115 FD_SET(csp->cfd, &rfds);
3118 FD_SET(csp->server_connection.sfd, &rfds);
3119 #endif /* ndef HAVE_POLL */
3121 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3122 if ((csp->flags & CSP_FLAG_CHUNKED)
3123 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3124 && ((csp->iob->eod - csp->iob->cur) >= 5)
3125 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
3128 * XXX: This check should be obsolete now,
3129 * but let's wait a while to be sure.
3131 log_error(LOG_LEVEL_CONNECT,
3132 "Looks like we got the last chunk together with "
3133 "the server headers but didn't detect it earlier. "
3134 "We better stop reading.");
3135 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
3136 csp->expected_content_length = byte_count;
3137 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
3139 if (server_body && server_response_is_complete(csp, byte_count))
3141 if (csp->expected_content_length == byte_count)
3143 log_error(LOG_LEVEL_CONNECT,
3144 "Done reading from server. Content length: %llu as expected. "
3145 "Bytes most recently read: %ld.",
3150 log_error(LOG_LEVEL_CONNECT,
3151 "Done reading from server. Expected content length: %llu. "
3152 "Actual content length: %llu. Bytes most recently read: %ld.",
3153 csp->expected_content_length, byte_count, len);
3157 * XXX: Should not jump around, handle_established_connection()
3158 * is complicated enough already.
3162 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
3165 poll_fds[0].fd = csp->cfd;
3166 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3167 if (!watch_client_socket)
3170 * Ignore incoming data, but still watch out
3171 * for disconnects etc. These flags are always
3172 * implied anyway but explicitly setting them
3175 poll_fds[0].events = POLLERR|POLLHUP;
3180 poll_fds[0].events = POLLIN;
3182 poll_fds[1].fd = csp->server_connection.sfd;
3183 poll_fds[1].events = POLLIN;
3184 n = poll(poll_fds, 2, csp->config->socket_timeout * 1000);
3186 timeout.tv_sec = csp->config->socket_timeout;
3187 timeout.tv_usec = 0;
3188 n = select((int)maxfd + 1, &rfds, NULL, NULL, &timeout);
3189 #endif /* def HAVE_POLL */
3191 /* Server or client not responding in timeout */
3194 log_error(LOG_LEVEL_CONNECT, "Socket timeout %d reached: %s",
3195 csp->config->socket_timeout, http->url);
3196 if ((byte_count == 0) && (http->ssl == 0))
3198 send_crunch_response(csp, error_response(csp, "connection-timeout"));
3200 mark_server_socket_tainted(csp);
3201 #ifdef FEATURE_HTTPS_INSPECTION
3202 close_client_and_server_ssl_connections(csp);
3209 log_error(LOG_LEVEL_ERROR, "poll() failed!: %E");
3211 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
3213 mark_server_socket_tainted(csp);
3214 #ifdef FEATURE_HTTPS_INSPECTION
3215 close_client_and_server_ssl_connections(csp);
3221 * This is the body of the browser's request,
3222 * just read and write it.
3224 * Receives data from browser and sends it to server
3226 * XXX: Make sure the client doesn't use pipelining
3227 * behind Privoxy's back.
3230 if ((poll_fds[0].revents & (POLLERR|POLLHUP|POLLNVAL)) != 0)
3232 log_error(LOG_LEVEL_CONNECT,
3233 "The client socket %d has become unusable while "
3234 "the server socket %d is still open.",
3235 csp->cfd, csp->server_connection.sfd);
3236 mark_server_socket_tainted(csp);
3240 if (poll_fds[0].revents != 0)
3242 if (FD_ISSET(csp->cfd, &rfds))
3243 #endif /* def HAVE_POLL*/
3245 int max_bytes_to_read = (int)csp->receive_buffer_size;
3247 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3248 if ((csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
3250 if (data_is_available(csp->cfd, 0))
3253 * If the next request is already waiting, we have
3254 * to stop select()ing the client socket. Otherwise
3255 * we would always return right away and get nothing
3258 watch_client_socket = 0;
3259 log_error(LOG_LEVEL_CONNECT,
3260 "Stop watching client socket %d. "
3261 "There's already another request waiting.",
3266 * If the client socket is set, but there's no data
3267 * available on the socket, the client went fishing
3268 * and continuing talking to the server makes no sense.
3270 log_error(LOG_LEVEL_CONNECT,
3271 "The client closed socket %d while "
3272 "the server socket %d is still open.",
3273 csp->cfd, csp->server_connection.sfd);
3274 mark_server_socket_tainted(csp);
3277 if (csp->expected_client_content_length != 0)
3279 if (csp->expected_client_content_length < csp->receive_buffer_size)
3281 max_bytes_to_read = (int)csp->expected_client_content_length;
3283 log_error(LOG_LEVEL_CONNECT,
3284 "Waiting for up to %d bytes from the client.",
3287 assert(max_bytes_to_read <= csp->receive_buffer_size);
3288 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3290 #ifdef FEATURE_HTTPS_INSPECTION
3291 if (client_use_ssl(csp))
3293 if (csp->http->status == 101)
3295 len = ssl_recv_data(&(csp->ssl_client_attr),
3296 (unsigned char *)csp->receive_buffer,
3297 (size_t)max_bytes_to_read);
3300 log_error(LOG_LEVEL_ERROR, "Failed to receive data "
3301 "on client socket %d for an upgraded connection",
3307 log_error(LOG_LEVEL_CONNECT, "Done receiving data "
3308 "on client socket %d for an upgraded connection",
3312 byte_count += (unsigned long long)len;
3313 len = ssl_send_data(&(csp->ssl_server_attr),
3314 (unsigned char *)csp->receive_buffer, (size_t)len);
3317 log_error(LOG_LEVEL_ERROR, "Failed to send data "
3318 "on server socket %d for an upgraded connection",
3319 csp->server_connection.sfd);
3324 log_error(LOG_LEVEL_CONNECT, "Breaking with TLS/SSL.");
3328 #endif /* def FEATURE_HTTPS_INSPECTION */
3330 len = read_socket(csp->cfd, csp->receive_buffer, max_bytes_to_read);
3334 /* XXX: not sure if this is necessary. */
3335 mark_server_socket_tainted(csp);
3336 break; /* "game over, man" */
3339 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3340 if (csp->expected_client_content_length != 0)
3342 assert(len <= max_bytes_to_read);
3343 csp->expected_client_content_length -= (unsigned)len;
3344 log_error(LOG_LEVEL_CONNECT,
3345 "Expected client content length set to %llu "
3346 "after reading %ld bytes.",
3347 csp->expected_client_content_length, len);
3348 if (csp->expected_client_content_length == 0)
3350 log_error(LOG_LEVEL_CONNECT,
3351 "Done reading from the client.");
3352 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
3355 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3357 if (write_socket(csp->server_connection.sfd, csp->receive_buffer, (size_t)len))
3359 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
3360 mark_server_socket_tainted(csp);
3368 * The server wants to talk. It could be the header or the body.
3369 * If `hdr' is null, then it's the header otherwise it's the body.
3370 * FIXME: Does `hdr' really mean `host'? No.
3373 if (poll_fds[1].revents != 0)
3375 if (FD_ISSET(csp->server_connection.sfd, &rfds))
3376 #endif /* HAVE_POLL */
3378 #ifdef FEATURE_HTTPS_INSPECTION
3379 server_wants_to_talk:
3381 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3383 * If we are buffering content, we don't want to eat up to
3384 * buffer-limit bytes if the client no longer cares about them.
3385 * If we aren't buffering, however, a dead client socket will be
3386 * noticed pretty much right away anyway, so we can reduce the
3387 * overhead by skipping the check.
3389 if (buffer_and_filter_content && !socket_is_still_alive(csp->cfd))
3392 log_error(LOG_LEVEL_CONNECT,
3393 "The server still wants to talk, but the client may already have hung up on us.");
3395 log_error(LOG_LEVEL_CONNECT,
3396 "The server still wants to talk, but the client hung up on us.");
3397 mark_server_socket_tainted(csp);
3398 #ifdef FEATURE_HTTPS_INSPECTION
3399 close_client_and_server_ssl_connections(csp);
3402 #endif /* def _WIN32 */
3404 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3406 #ifdef FEATURE_HTTPS_INSPECTION
3408 * Reading data from standard or secured connection (HTTP/HTTPS)
3410 if (server_use_ssl(csp))
3412 len = ssl_recv_data(&(csp->ssl_server_attr),
3413 (unsigned char *)csp->receive_buffer, csp->receive_buffer_size);
3418 len = read_socket(csp->server_connection.sfd, csp->receive_buffer,
3419 (int)csp->receive_buffer_size);
3424 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
3426 if ((http->ssl && (csp->fwd == NULL))
3427 #ifdef FEATURE_HTTPS_INSPECTION
3433 * Just hang up. We already confirmed the client's CONNECT
3434 * request with status code 200 and unencrypted content is
3435 * no longer welcome.
3437 log_error(LOG_LEVEL_ERROR,
3438 "CONNECT already confirmed. Unable to tell the client about the problem.");
3441 else if (byte_count)
3444 * Just hang up. We already transmitted the original headers
3445 * and parts of the original content and therefore missed the
3446 * chance to send an error message (without risking data corruption).
3448 * XXX: we could retry with a fancy range request here.
3450 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
3451 "Unable to tell the client about the problem.");
3452 mark_server_socket_tainted(csp);
3453 #ifdef FEATURE_HTTPS_INSPECTION
3454 close_client_and_server_ssl_connections(csp);
3459 * XXX: Consider handling the cases above the same.
3461 mark_server_socket_tainted(csp);
3465 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3466 if (csp->flags & CSP_FLAG_CHUNKED)
3468 if ((len >= 5) && !memcmp(csp->receive_buffer+len-5, "0\r\n\r\n", 5))
3470 /* XXX: this is a temporary hack */
3471 log_error(LOG_LEVEL_CONNECT,
3472 "Looks like we reached the end of the last chunk. "
3473 "We better stop reading.");
3474 csp->expected_content_length = byte_count + (unsigned long long)len;
3475 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
3479 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
3482 * This is guaranteed by allocating with zalloc_or_die()
3483 * and never (intentionally) writing to the last byte.
3485 * csp->receive_buffer_size is the size of the part of the
3486 * buffer we intentionally write to, but we actually
3487 * allocated csp->receive_buffer_size+1 bytes so the assertion
3488 * stays within the allocated range.
3490 assert(csp->receive_buffer[csp->receive_buffer_size] == '\0');
3493 * Add a trailing zero to let be able to use string operations.
3494 * XXX: do we still need this with filter_popups gone?
3496 assert(len <= csp->receive_buffer_size);
3497 csp->receive_buffer[len] = '\0';
3500 * Normally, this would indicate that we've read
3501 * as much as the server has sent us and we can
3502 * close the client connection. However, Microsoft
3503 * in its wisdom has released IIS/5 with a bug that
3504 * prevents it from sending the trailing \r\n in
3505 * a 302 redirect header (and possibly other headers).
3506 * To work around this if we've haven't parsed
3507 * a full header we'll append a trailing \r\n
3508 * and see if this now generates a valid one.
3510 * This hack shouldn't have any impacts. If we've
3511 * already transmitted the header or if this is a
3512 * SSL connection, then we won't bother with this
3513 * hack. So we only work on partially received
3514 * headers. If we append a \r\n and this still
3515 * doesn't generate a valid header, then we won't
3516 * transmit anything to the client.
3521 if (server_body || (http->ssl
3522 #ifdef FEATURE_HTTPS_INSPECTION
3528 * If we have been buffering up the document,
3529 * now is the time to apply content modification
3530 * and send the result to the client.
3532 if (buffer_and_filter_content)
3534 p = execute_content_filters(csp);
3536 * If content filtering fails, use the original
3537 * buffer and length.
3538 * (see p != NULL ? p : csp->iob->cur below)
3542 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
3544 #ifdef FEATURE_COMPRESSION
3545 else if ((csp->flags & CSP_FLAG_CLIENT_SUPPORTS_DEFLATE)
3546 && (csp->content_length > LOWER_LENGTH_LIMIT_FOR_COMPRESSION))
3548 char *compressed_content = compress_buffer(p,
3549 (size_t *)&csp->content_length, csp->config->compression_level);
3550 if (compressed_content != NULL)
3553 p = compressed_content;
3554 csp->flags |= CSP_FLAG_BUFFERED_CONTENT_DEFLATED;
3559 if (JB_ERR_OK != update_server_headers(csp))
3561 log_error(LOG_LEVEL_FATAL,
3562 "Failed to update server headers. after filtering.");
3565 hdr = list_to_text(csp->headers);
3568 /* FIXME Should handle error properly */
3569 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3572 #ifdef FEATURE_HTTPS_INSPECTION
3574 * Sending data with standard or secured connection (HTTP/HTTPS)
3576 if (client_use_ssl(csp))
3578 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
3579 (const unsigned char *)hdr, strlen(hdr),
3580 get_write_delay(csp)) < 0)
3581 || (ssl_send_data_delayed(&(csp->ssl_client_attr),
3582 (const unsigned char *) ((p != NULL) ? p : csp->iob->cur),
3583 csp->content_length, get_write_delay(csp)) < 0))
3585 log_error(LOG_LEVEL_ERROR,
3586 "Failed to send the modified content to the client over TLS");
3589 mark_server_socket_tainted(csp);
3590 close_client_and_server_ssl_connections(csp);
3595 #endif /* def FEATURE_HTTPS_INSPECTION */
3597 if (write_socket_delayed(csp->cfd, hdr, strlen(hdr), write_delay)
3598 || write_socket_delayed(csp->cfd, ((p != NULL) ? p : csp->iob->cur),
3599 (size_t)csp->content_length, write_delay))
3601 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
3604 mark_server_socket_tainted(csp);
3613 break; /* "game over, man" */
3617 * This is not the body, so let's pretend the server just sent
3620 snprintf(csp->receive_buffer, csp->receive_buffer_size, "\r\n");
3621 len = (int)strlen(csp->receive_buffer);
3624 * Now, let the normal header parsing algorithm below do its
3625 * job. If it fails, we'll exit instead of continuing.
3632 * If we're in the body of the server document, just write it to
3633 * the client, unless we need to buffer the body for later
3634 * content-filtering.
3636 if (server_body || (http->ssl
3637 #ifdef FEATURE_HTTPS_INSPECTION
3642 if (buffer_and_filter_content)
3645 * If there is no memory left for buffering the content, or the buffer limit
3646 * has been reached, switch to non-filtering mode, i.e. make & write the
3647 * header, flush the iob and buf, and get out of the way.
3649 if (add_to_iob(csp->iob, csp->config->buffer_limit, csp->receive_buffer, len))
3654 log_error(LOG_LEVEL_INFO,
3655 "Flushing header and buffers. Stepping back from filtering.");
3657 hdr = list_to_text(csp->headers);
3661 * Memory is too tight to even generate the header.
3662 * Send our static "Out-of-memory" page.
3664 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
3665 rsp = cgi_error_memory();
3666 send_crunch_response(csp, rsp);
3667 mark_server_socket_tainted(csp);
3668 #ifdef FEATURE_HTTPS_INSPECTION
3669 close_client_and_server_ssl_connections(csp);
3673 hdrlen = strlen(hdr);
3675 #ifdef FEATURE_HTTPS_INSPECTION
3677 * Sending data with standard or secured connection (HTTP/HTTPS)
3679 if (client_use_ssl(csp))
3681 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
3682 (const unsigned char *)hdr, hdrlen, get_write_delay(csp)) < 0)
3683 || ((flushed = ssl_flush_socket(&(csp->ssl_client_attr),
3685 || (ssl_send_data_delayed(&(csp->ssl_client_attr),
3686 (const unsigned char *)csp->receive_buffer, (size_t)len,
3687 get_write_delay(csp)) < 0))
3689 log_error(LOG_LEVEL_CONNECT,
3690 "Flush header and buffers to client failed");
3692 mark_server_socket_tainted(csp);
3693 close_client_and_server_ssl_connections(csp);
3698 #endif /* def FEATURE_HTTPS_INSPECTION */
3700 if (write_socket_delayed(csp->cfd, hdr, hdrlen, write_delay)
3701 || ((flushed = flush_iob(csp->cfd, csp->iob, write_delay)) < 0)
3702 || write_socket_delayed(csp->cfd, csp->receive_buffer, (size_t)len,
3705 log_error(LOG_LEVEL_CONNECT,
3706 "Flush header and buffers to client failed: %E");
3708 mark_server_socket_tainted(csp);
3714 * Reset the byte_count to the amount of bytes
3715 * we just flushed. len will be added a few lines below,
3716 * hdrlen doesn't matter for LOG_LEVEL_CLF.
3718 byte_count = (unsigned long long)flushed;
3720 buffer_and_filter_content = 0;
3726 #ifdef FEATURE_HTTPS_INSPECTION
3728 * Sending data with standard or secured connection (HTTP/HTTPS)
3730 if (client_use_ssl(csp))
3732 ret = ssl_send_data_delayed(&(csp->ssl_client_attr),
3733 (const unsigned char *)csp->receive_buffer, (size_t)len,
3734 get_write_delay(csp));
3737 log_error(LOG_LEVEL_ERROR,
3738 "Sending data to client failed");
3739 mark_server_socket_tainted(csp);
3740 close_client_and_server_ssl_connections(csp);
3745 #endif /* def FEATURE_HTTPS_INSPECTION */
3747 if (write_socket_delayed(csp->cfd, csp->receive_buffer,
3748 (size_t)len, write_delay))
3750 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
3751 mark_server_socket_tainted(csp);
3756 byte_count += (unsigned long long)len;
3762 * We're still looking for the end of the server's header.
3763 * Buffer up the data we just read. If that fails, there's
3764 * little we can do but send our static out-of-memory page.
3766 if (add_to_iob(csp->iob, csp->config->buffer_limit, csp->receive_buffer, len))
3768 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
3769 rsp = cgi_error_memory();
3770 send_crunch_response(csp, rsp);
3771 mark_server_socket_tainted(csp);
3772 #ifdef FEATURE_HTTPS_INSPECTION
3773 close_client_and_server_ssl_connections(csp);
3778 /* Convert iob into something sed() can digest */
3779 if (JB_ERR_PARSE == get_server_headers(csp))
3784 * Well, we tried our MS IIS/5 hack and it didn't work.
3785 * The header is incomplete and there isn't anything
3786 * we can do about it.
3788 log_error(LOG_LEVEL_ERROR, "Invalid server headers. "
3789 "Applying the MS IIS5 hack didn't help.");
3790 log_error(LOG_LEVEL_CLF,
3791 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3792 #ifdef FEATURE_HTTPS_INSPECTION
3794 * Sending data with standard or secured connection (HTTP/HTTPS)
3796 if (client_use_ssl(csp))
3798 ssl_send_data_delayed(&(csp->ssl_client_attr),
3799 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3800 strlen(INVALID_SERVER_HEADERS_RESPONSE), get_write_delay(csp));
3803 #endif /* def FEATURE_HTTPS_INSPECTION */
3805 write_socket_delayed(csp->cfd,
3806 INVALID_SERVER_HEADERS_RESPONSE,
3807 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
3809 mark_server_socket_tainted(csp);
3810 #ifdef FEATURE_HTTPS_INSPECTION
3811 close_client_and_server_ssl_connections(csp);
3818 * Since we have to wait for more from the server before
3819 * we can parse the headers we just continue here.
3821 log_error(LOG_LEVEL_CONNECT,
3822 "Continuing buffering server headers from socket %d. "
3823 "Bytes most recently read: %ld.", csp->cfd, len);
3830 * Account for the content bytes we
3831 * might have gotten with the headers.
3833 assert(csp->iob->eod >= csp->iob->cur);
3834 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
3837 /* Did we actually get anything? */
3838 if (NULL == csp->headers->first)
3840 if ((csp->flags & CSP_FLAG_REUSED_CLIENT_CONNECTION))
3842 log_error(LOG_LEVEL_ERROR,
3843 "No server or forwarder response received on socket %d. "
3844 "Closing client socket %d without sending data.",
3845 csp->server_connection.sfd, csp->cfd);
3846 log_error(LOG_LEVEL_CLF,
3847 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3851 log_error(LOG_LEVEL_ERROR,
3852 "No server or forwarder response received on socket %d.",
3853 csp->server_connection.sfd);
3854 send_crunch_response(csp, error_response(csp, "no-server-data"));
3856 free_http_request(http);
3857 mark_server_socket_tainted(csp);
3858 #ifdef FEATURE_HTTPS_INSPECTION
3859 close_client_and_server_ssl_connections(csp);
3864 if (!csp->headers->first->str)
3866 log_error(LOG_LEVEL_ERROR, "header search: csp->headers->first->str == NULL, assert will be called");
3868 assert(csp->headers->first->str);
3870 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3871 strncmpic(csp->headers->first->str, "ICY", 3))
3874 * It doesn't look like a HTTP (or Shoutcast) response:
3875 * tell the client and log the problem.
3877 if (strlen(csp->headers->first->str) > 30)
3879 csp->headers->first->str[30] = '\0';
3881 log_error(LOG_LEVEL_ERROR,
3882 "Invalid server or forwarder response. Starts with: %s",
3883 csp->headers->first->str);
3884 log_error(LOG_LEVEL_CLF,
3885 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3886 #ifdef FEATURE_HTTPS_INSPECTION
3888 * Sending data with standard or secured connection (HTTP/HTTPS)
3890 if (client_use_ssl(csp))
3892 ssl_send_data_delayed(&(csp->ssl_client_attr),
3893 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3894 strlen(INVALID_SERVER_HEADERS_RESPONSE),
3895 get_write_delay(csp));
3898 #endif /* def FEATURE_HTTPS_INSPECTION */
3900 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3901 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
3903 free_http_request(http);
3904 mark_server_socket_tainted(csp);
3905 #ifdef FEATURE_HTTPS_INSPECTION
3906 close_client_and_server_ssl_connections(csp);
3912 * Disable redirect checkers, so that they will be only run
3913 * again if the user also enables them through tags.
3915 * From a performance point of view it doesn't matter,
3916 * but it prevents duplicated log messages.
3918 #ifdef FEATURE_FAST_REDIRECTS
3919 csp->action->flags &= ~ACTION_FAST_REDIRECTS;
3921 csp->action->flags &= ~ACTION_REDIRECT;
3924 * We have now received the entire server header,
3925 * filter it and send the result to the client
3927 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3929 log_error(LOG_LEVEL_CLF,
3930 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3931 #ifdef FEATURE_HTTPS_INSPECTION
3933 * Sending data with standard or secured connection (HTTP/HTTPS)
3935 if (client_use_ssl(csp))
3937 ssl_send_data_delayed(&(csp->ssl_client_attr),
3938 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3939 strlen(INVALID_SERVER_HEADERS_RESPONSE),
3940 get_write_delay(csp));
3945 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3946 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
3948 free_http_request(http);
3949 mark_server_socket_tainted(csp);
3950 #ifdef FEATURE_HTTPS_INSPECTION
3951 close_client_and_server_ssl_connections(csp);
3955 hdr = list_to_text(csp->headers);
3958 /* FIXME Should handle error properly */
3959 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3962 if ((csp->flags & CSP_FLAG_CHUNKED)
3963 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3964 && ((csp->iob->eod - csp->iob->cur) >= 5)
3965 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
3967 log_error(LOG_LEVEL_CONNECT,
3968 "Looks like we got the last chunk together with "
3969 "the server headers. We better stop reading.");
3970 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
3971 csp->expected_content_length = byte_count;
3972 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
3975 csp->server_connection.response_received = time(NULL);
3977 if (crunch_response_triggered(csp, crunchers_light))
3980 * One of the tags created by a server-header
3981 * tagger triggered a crunch. We already
3982 * delivered the crunch response to the client
3983 * and are done here after cleaning up.
3986 mark_server_socket_tainted(csp);
3987 #ifdef FEATURE_HTTPS_INSPECTION
3988 close_client_and_server_ssl_connections(csp);
3993 /* Buffer and pcrs filter this if appropriate. */
3994 buffer_and_filter_content = content_requires_filtering(csp);
3996 if (!buffer_and_filter_content)
3999 * Write the server's (modified) header to
4000 * the client (along with anything else that
4001 * may be in the buffer). Use standard or secured
4004 #ifdef FEATURE_HTTPS_INSPECTION
4005 if (client_use_ssl(csp))
4007 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
4008 (const unsigned char *)hdr, strlen(hdr),
4009 get_write_delay(csp)) < 0)
4010 || ((len = ssl_flush_socket(&(csp->ssl_client_attr),
4013 log_error(LOG_LEVEL_CONNECT, "Write header to client failed");
4016 * The write failed, so don't bother mentioning it
4017 * to the client... it probably can't hear us anyway.
4020 mark_server_socket_tainted(csp);
4021 #ifdef FEATURE_HTTPS_INSPECTION
4022 close_client_and_server_ssl_connections(csp);
4028 #endif /* def FEATURE_HTTPS_INSPECTION */
4030 if (write_socket_delayed(csp->cfd, hdr, strlen(hdr), write_delay)
4031 || ((len = flush_iob(csp->cfd, csp->iob, write_delay)) < 0))
4033 log_error(LOG_LEVEL_ERROR,
4034 "write header to client failed");
4036 * The write failed, so don't bother mentioning it
4037 * to the client... it probably can't hear us anyway.
4040 mark_server_socket_tainted(csp);
4046 /* we're finished with the server's header */
4052 * If this was a MS IIS/5 hack then it means the server
4053 * has already closed the connection. Nothing more to read.
4058 log_error(LOG_LEVEL_ERROR,
4059 "Closed server connection detected. "
4060 "Applying the MS IIS5 hack didn't help.");
4061 log_error(LOG_LEVEL_CLF,
4062 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
4063 #ifdef FEATURE_HTTPS_INSPECTION
4065 * Sending data with standard or secured connection (HTTP/HTTPS)
4067 if (client_use_ssl(csp))
4069 ssl_send_data_delayed(&(csp->ssl_client_attr),
4070 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
4071 strlen(INVALID_SERVER_HEADERS_RESPONSE),
4072 get_write_delay(csp));
4075 #endif /* def FEATURE_HTTPS_INSPECTION */
4077 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
4078 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
4080 mark_server_socket_tainted(csp);
4081 #ifdef FEATURE_HTTPS_INSPECTION
4082 close_client_and_server_ssl_connections(csp);
4089 mark_server_socket_tainted(csp);
4090 #ifdef FEATURE_HTTPS_INSPECTION
4091 close_client_and_server_ssl_connections(csp);
4093 return; /* huh? we should never get here */
4096 if (csp->content_length == 0)
4099 * If Privoxy didn't recalculate the Content-Length,
4100 * byte_count is still correct.
4102 csp->content_length = byte_count;
4105 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4106 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
4107 && (csp->expected_content_length != byte_count))
4109 log_error(LOG_LEVEL_CONNECT,
4110 "Received %llu bytes while expecting %llu.",
4111 byte_count, csp->expected_content_length);
4112 mark_server_socket_tainted(csp);
4116 #ifdef FEATURE_HTTPS_INSPECTION
4117 if (client_use_ssl(csp))
4119 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s https://%s%s %s\" 200 %llu",
4120 csp->ip_addr_str, http->gpc, http->hostport, http->path,
4121 http->version, csp->content_length);
4126 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
4127 csp->ip_addr_str, http->ocmd, csp->content_length);
4129 csp->server_connection.timestamp = time(NULL);
4133 /*********************************************************************
4137 * Description : Once a connection from the client has been accepted,
4138 * this function is called (via serve()) to handle the
4139 * main business of the communication. This function
4140 * returns after dealing with a single request. It can
4141 * be called multiple times with the same client socket
4142 * if the client is keeping the connection alive.
4144 * The decision whether or not a client connection will
4145 * be kept alive is up to the caller which also must
4146 * close the client socket when done.
4148 * FIXME: chat is nearly thousand lines long.
4152 * 1 : csp = Current client state (buffers, headers, etc...)
4154 * Returns : Nothing.
4156 *********************************************************************/
4157 static void chat(struct client_state *csp)
4159 const struct forward_spec *fwd;
4160 struct http_request *http;
4161 /* Skeleton for HTTP response, if we should intercept the request */
4162 struct http_response *rsp;
4163 #ifdef FEATURE_HTTPS_INSPECTION
4164 int use_ssl_tunnel = 0;
4169 if (receive_client_request(csp) != JB_ERR_OK)
4173 if (parse_client_request(csp) != JB_ERR_OK)
4178 #ifdef FEATURE_HTTPS_INSPECTION
4180 * Setting flags to use old solution with SSL tunnel and to disable
4181 * certificate verification.
4183 if (csp->http->ssl && !(csp->action->flags & ACTION_HTTPS_INSPECTION)
4184 && !cgi_page_requested(csp->http->host))
4189 if (http->ssl && (csp->action->flags & ACTION_IGNORE_CERTIFICATE_ERRORS))
4191 csp->dont_verify_certificate = 1;
4196 * build the http request to send to the server
4197 * we have to do one of the following:
4199 * create = use the original HTTP request to create a new
4200 * HTTP request that has either the path component
4201 * without the http://domainspec (w/path) or the
4202 * full orininal URL (w/url)
4203 * Note that the path and/or the HTTP version may
4204 * have been altered by now.
4206 * SSL proxy = Open a socket to the host:port of the server
4207 * and create TLS/SSL connection with server and
4208 * with client. Then behave like mediator between
4209 * client and server over TLS/SSL.
4211 * SSL proxy = Pass the request unchanged if forwarding a CONNECT
4212 * with request to a parent proxy. Note that we'll be sending
4213 * forwarding the CFAIL message ourselves if connecting to the parent
4214 * fails, but we won't send a CSUCCEED message if it works,
4215 * since that would result in a double message (ours and the
4216 * parent's). After sending the request to the parent, we
4217 * must parse answer and send it to client. If connection
4218 * with server is established, we do TLS/SSL proxy. Otherwise
4219 * we send parent response to client and close connections.
4221 * here's the matrix:
4224 * +--------+--------+
4226 * 0 | create | SSL |
4227 * | w/path | proxy |
4228 * Forwarding +--------+--------+
4230 * 1 | create | proxy |
4231 * | w/url |+forward|
4232 * +--------+--------+
4236 #ifdef FEATURE_HTTPS_INSPECTION
4238 * Presetting SSL client and server flags
4240 if (http->ssl && !use_ssl_tunnel)
4242 http->client_ssl = 1;
4243 http->server_ssl = 1;
4247 http->client_ssl = 0;
4248 http->server_ssl = 0;
4252 #ifdef FEATURE_HTTPS_INSPECTION
4254 * Log the request unless we're https inspecting
4255 * in which case we don't have the path yet and
4256 * will log the request later.
4258 if (!client_use_ssl(csp))
4261 log_error(LOG_LEVEL_REQUEST, "%s%s", http->hostport, http->path);
4264 if (http->ssl && connect_port_is_forbidden(csp))
4266 const char *acceptable_connect_ports =
4267 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
4268 assert(NULL != acceptable_connect_ports);
4269 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
4270 "limit-connect{%s} doesn't allow CONNECT requests to %s",
4271 csp->ip_addr_str, acceptable_connect_ports, csp->http->hostport);
4272 csp->action->flags |= ACTION_BLOCK;
4274 #ifdef FEATURE_HTTPS_INSPECTION
4275 http->client_ssl = 0;
4276 http->server_ssl = 0;
4281 * We have a request. Check if one of the crunchers wants it
4282 * unless the client wants to use TLS/SSL in which case we
4283 * haven't setup the TLS context yet and will send the crunch
4287 #ifdef FEATURE_HTTPS_INSPECTION
4288 !client_use_ssl(csp) &&
4290 crunch_response_triggered(csp, crunchers_all))
4293 * Yes. The client got the crunch response and we're done here.
4298 #ifdef FEATURE_HTTPS_INSPECTION
4299 if (client_use_ssl(csp) && !use_ssl_tunnel)
4303 * Creating a SSL proxy.
4305 * By sending the CSUCCEED message we're lying to the client as
4306 * the connection hasn't actually been established yet. We don't
4307 * establish the connection until we have seen and parsed the
4308 * encrypted client headers.
4310 if (write_socket_delayed(csp->cfd, CSUCCEED,
4311 strlen(CSUCCEED), get_write_delay(csp)) != 0)
4313 log_error(LOG_LEVEL_ERROR, "Sending SUCCEED to client failed");
4317 ret = create_client_ssl_connection(csp);
4320 log_error(LOG_LEVEL_ERROR,
4321 "Failed to open a secure connection with the client");
4324 if (JB_ERR_OK != process_encrypted_request_headers(csp))
4326 close_client_ssl_connection(csp);
4330 * We have an encrypted request. Check if one of the crunchers now
4331 * wants it (for example because the previously invisible path was
4332 * required to match).
4334 if (crunch_response_triggered(csp, crunchers_all))
4337 * Yes. The client got the crunch response and we're done here.
4344 log_applied_actions(csp->action);
4346 /* decide how to route the HTTP request */
4347 fwd = forward_url(csp, http);
4349 freez(csp->headers->first->str);
4350 build_request_line(csp, fwd, &csp->headers->first->str);
4352 if (fwd->forward_host)
4354 log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
4355 fwd->forward_host, fwd->forward_port, http->hostport);
4359 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
4362 /* here we connect to the server, gateway, or the forwarder */
4364 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4365 if ((csp->server_connection.sfd != JB_INVALID_SOCKET)
4366 && socket_is_still_alive(csp->server_connection.sfd)
4367 && connection_destination_matches(&csp->server_connection, http, fwd))
4369 log_error(LOG_LEVEL_CONNECT,
4370 "Reusing server socket %d connected to %s. Total requests: %u.",
4371 csp->server_connection.sfd, csp->server_connection.host,
4372 csp->server_connection.requests_sent_total);
4376 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
4378 #ifdef FEATURE_CONNECTION_SHARING
4379 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING
4380 #ifdef FEATURE_HTTPS_INSPECTION
4381 && !server_use_ssl(csp)
4385 remember_connection(&csp->server_connection);
4388 #endif /* def FEATURE_CONNECTION_SHARING */
4390 log_error(LOG_LEVEL_CONNECT,
4391 "Closing server socket %d connected to %s. Total requests: %u.",
4392 csp->server_connection.sfd, csp->server_connection.host,
4393 csp->server_connection.requests_sent_total);
4394 close_socket(csp->server_connection.sfd);
4396 mark_connection_closed(&csp->server_connection);
4398 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4401 * Connecting to destination server
4403 csp->server_connection.sfd = forwarded_connect(fwd, http, csp);
4405 if (csp->server_connection.sfd == JB_INVALID_SOCKET)
4407 if (fwd->type != SOCKS_NONE)
4410 rsp = error_response(csp, "forwarding-failed");
4412 else if (errno == EINVAL)
4414 rsp = error_response(csp, "no-such-domain");
4418 rsp = error_response(csp, "connect-failed");
4421 /* Write the answer to the client */
4424 send_crunch_response(csp, rsp);
4428 * Temporary workaround to prevent already-read client
4429 * bodies from being parsed as new requests. For now we
4430 * err on the safe side and throw all the following
4431 * requests under the bus, even if no client body has been
4432 * buffered. A compliant client will repeat the dropped
4433 * requests on an untainted connection.
4435 * The proper fix is to discard the no longer needed
4436 * client body in the buffer (if there is one) and to
4437 * continue parsing the bytes that follow.
4439 #ifdef FEATURE_HTTPS_INSPECTION
4440 close_client_ssl_connection(csp);
4442 drain_and_close_socket(csp->cfd);
4443 csp->cfd = JB_INVALID_SOCKET;
4448 #ifdef FEATURE_HTTPS_INSPECTION
4450 * Creating TLS/SSL connections with destination server or parent
4451 * proxy. If forwarding is enabled, we must send client request to
4452 * parent proxy and receive, parse and resend parent proxy answer.
4454 if (http->ssl && !use_ssl_tunnel)
4456 if (fwd->forward_host != NULL)
4458 char server_response[BUFFER_SIZE];
4461 char *hdr = list_to_text(csp->headers);
4462 memset(server_response, 0, sizeof(server_response));
4466 log_error(LOG_LEVEL_FATAL,
4467 "Out of memory parsing client header");
4469 list_remove_all(csp->headers);
4472 * Sending client's CONNECT request to the parent proxy
4474 ret = write_socket(csp->server_connection.sfd, hdr, strlen(hdr));
4480 log_error(LOG_LEVEL_CONNECT,
4481 "Sending request headers to: %s failed", http->hostport);
4482 mark_server_socket_tainted(csp);
4483 close_client_ssl_connection(csp);
4487 /* Waiting for parent proxy server response */
4488 len = read_socket(csp->server_connection.sfd, server_response,
4489 sizeof(server_response)-1);
4493 log_error(LOG_LEVEL_ERROR, "No response from parent proxy "
4494 "server on socket %d.", csp->server_connection.sfd);
4496 rsp = error_response(csp, "no-server-data");
4499 send_crunch_response(csp, rsp);
4501 mark_server_socket_tainted(csp);
4502 close_client_ssl_connection(csp);
4507 * Test if the connection to the destination server was
4508 * established successfully by the parent proxy.
4510 if (!tunnel_established_successfully(server_response, (unsigned int)len))
4512 log_error(LOG_LEVEL_ERROR,
4513 "The forwarder %s failed to establish a connection with %s",
4514 fwd->forward_host, http->host);
4515 rsp = error_response(csp, "connect-failed");
4518 send_crunch_response(csp, rsp);
4520 mark_server_socket_tainted(csp);
4521 close_client_ssl_connection(csp);
4524 } /* -END- if (fwd->forward_host != NULL) */
4527 * We can now create the TLS/SSL connection with the destination server.
4529 int ret = create_server_ssl_connection(csp);
4532 if (csp->server_cert_verification_result != SSL_CERT_VALID &&
4533 csp->server_cert_verification_result != SSL_CERT_NOT_VERIFIED)
4536 * If the server certificate is invalid, we must inform
4537 * the client and then close connection to the client.
4539 ssl_send_certificate_error(csp);
4540 close_client_and_server_ssl_connections(csp);
4543 if (csp->server_cert_verification_result == SSL_CERT_NOT_VERIFIED
4544 || csp->server_cert_verification_result == SSL_CERT_VALID)
4547 * The TLS/SSL connection wasn't created but an invalid
4548 * certificate wasn't detected. Report it as connection
4551 rsp = error_response(csp, "connect-failed");
4554 send_crunch_response(csp, rsp);
4556 close_client_and_server_ssl_connections(csp);
4560 }/* -END- if (http->ssl) */
4561 #endif /* def FEATURE_HTTPS_INSPECTION */
4563 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4564 save_connection_destination(csp->server_connection.sfd,
4565 http, fwd, &csp->server_connection);
4566 csp->server_connection.keep_alive_timeout =
4567 (unsigned)csp->config->keep_alive_timeout;
4569 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4571 csp->server_connection.requests_sent_total++;
4573 if ((fwd->type == SOCKS_5T) && (NULL == csp->headers->first))
4575 /* Client headers have been sent optimistically */
4576 assert(csp->headers->last == NULL);
4578 else if (http->ssl == 0 || (fwd->forward_host
4579 #ifdef FEATURE_HTTPS_INSPECTION
4584 if (send_http_request(csp))
4586 rsp = error_response(csp, "connect-failed");
4589 send_crunch_response(csp, rsp);
4597 * Using old solution with SSL tunnel or new solution with SSL proxy
4599 list_remove_all(csp->headers);
4600 #ifdef FEATURE_HTTPS_INSPECTION
4605 * We're running an SSL tunnel and we're not forwarding,
4606 * so just ditch the client headers, send the "connect succeeded"
4607 * message to the client, flush the rest, and get out of the way.
4609 if (write_socket_delayed(csp->cfd, CSUCCEED,
4610 strlen(CSUCCEED), get_write_delay(csp)))
4615 #ifdef FEATURE_HTTPS_INSPECTION
4619 * If server certificate has been verified and is invalid,
4620 * we must inform the client and then close the connection
4621 * with client and server.
4623 if (csp->server_cert_verification_result != SSL_CERT_VALID &&
4624 csp->server_cert_verification_result != SSL_CERT_NOT_VERIFIED)
4626 ssl_send_certificate_error(csp);
4627 close_client_and_server_ssl_connections(csp);
4630 if (send_https_request(csp))
4632 rsp = error_response(csp, "connect-failed");
4635 send_crunch_response(csp, rsp);
4637 close_client_and_server_ssl_connections(csp);
4641 #endif /* def FEATURE_HTTPS_INSPECTION */
4642 clear_iob(csp->client_iob);
4643 }/* -END- else ... if (http->ssl == 1) */
4645 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
4647 /* XXX: should the time start earlier for optimistically sent data? */
4648 csp->server_connection.request_sent = time(NULL);
4650 handle_established_connection(csp);
4651 freez(csp->receive_buffer);
4656 /*********************************************************************
4658 * Function : fuzz_server_response
4660 * Description : Treat the input as a whole server response.
4663 * 1 : csp = Current client state (buffers, headers, etc...)
4664 * 2 : fuzz_input_file = File to read the input from.
4668 *********************************************************************/
4669 extern int fuzz_server_response(struct client_state *csp, char *fuzz_input_file)
4671 static struct forward_spec fwd; /* Zero'd due to being static */
4674 if (strcmp(fuzz_input_file, "-") == 0)
4676 /* XXX: Doesn't work yet. */
4677 csp->server_connection.sfd = 0;
4681 csp->server_connection.sfd = open(fuzz_input_file, O_RDONLY);
4682 if (csp->server_connection.sfd == -1)
4684 log_error(LOG_LEVEL_FATAL, "Failed to open %s: %E",
4689 csp->content_type |= CT_GIF;
4690 csp->action->flags |= ACTION_DEANIMATE;
4691 csp->action->string[ACTION_STRING_DEANIMATE] = "last";
4693 csp->http->path = strdup_or_die("/");
4694 csp->http->host = strdup_or_die("fuzz.example.org");
4695 csp->http->hostport = strdup_or_die("fuzz.example.org:80");
4696 /* Prevent client socket monitoring */
4697 csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
4698 csp->flags |= CSP_FLAG_CHUNKED;
4700 csp->config->feature_flags |= RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE;
4701 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
4703 csp->content_type |= CT_DECLARED|CT_GIF;
4705 csp->config->socket_timeout = 0;
4707 cgi_init_error_messages();
4709 handle_established_connection(csp);
4710 freez(csp->receive_buffer);
4717 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4718 /*********************************************************************
4720 * Function : prepare_csp_for_next_request
4722 * Description : Put the csp in a mostly vergin state.
4725 * 1 : csp = Current client state (buffers, headers, etc...)
4729 *********************************************************************/
4730 static void prepare_csp_for_next_request(struct client_state *csp)
4732 csp->content_type = 0;
4733 csp->content_length = 0;
4734 csp->expected_content_length = 0;
4735 csp->expected_client_content_length = 0;
4736 list_remove_all(csp->headers);
4737 clear_iob(csp->iob);
4738 freez(csp->error_message);
4739 free_http_request(csp->http);
4740 destroy_list(csp->headers);
4741 #ifdef FEATURE_HTTPS_INSPECTION
4742 destroy_list(csp->https_headers);
4744 destroy_list(csp->tags);
4745 #ifdef FEATURE_CLIENT_TAGS
4746 destroy_list(csp->client_tags);
4747 freez(csp->client_address);
4749 free_current_action(csp->action);
4750 if (NULL != csp->fwd)
4752 unload_forward_spec(csp->fwd);
4755 /* XXX: Store per-connection flags someplace else. */
4756 csp->flags = (CSP_FLAG_ACTIVE | CSP_FLAG_REUSED_CLIENT_CONNECTION);
4757 #ifdef FEATURE_TOGGLE
4758 if (global_toggle_state)
4759 #endif /* def FEATURE_TOGGLE */
4761 csp->flags |= CSP_FLAG_TOGGLED_ON;
4764 if (csp->client_iob->eod > csp->client_iob->cur)
4766 long bytes_to_shift = csp->client_iob->cur - csp->client_iob->buf;
4767 size_t data_length = (size_t)(csp->client_iob->eod - csp->client_iob->cur);
4769 assert(bytes_to_shift > 0);
4770 assert(data_length > 0);
4772 log_error(LOG_LEVEL_CONNECT, "Shifting %lu pipelined bytes by %ld bytes",
4773 data_length, bytes_to_shift);
4774 memmove(csp->client_iob->buf, csp->client_iob->cur, data_length);
4775 csp->client_iob->cur = csp->client_iob->buf;
4776 assert(csp->client_iob->eod == csp->client_iob->buf + bytes_to_shift + data_length);
4777 csp->client_iob->eod = csp->client_iob->buf + data_length;
4778 memset(csp->client_iob->eod, '\0', (size_t)bytes_to_shift);
4780 csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
4785 * We mainly care about resetting client_iob->cur so we don't
4786 * waste buffer space at the beginning and don't mess up the
4787 * request restoration done by cgi_show_request().
4789 * Freeing the buffer itself isn't technically necessary,
4790 * but makes debugging more convenient.
4792 clear_iob(csp->client_iob);
4795 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4798 /*********************************************************************
4802 * Description : This is little more than chat. We only "serve" to
4803 * to close (or remember) any socket that chat may have
4807 * 1 : csp = Current client state (buffers, headers, etc...)
4811 *********************************************************************/
4812 static void serve(struct client_state *csp)
4814 int config_file_change_detected = 0; /* Only used for debugging */
4815 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4816 #ifdef FEATURE_CONNECTION_SHARING
4817 static int monitor_thread_running = 0;
4818 #endif /* def FEATURE_CONNECTION_SHARING */
4819 int continue_chatting = 0;
4821 log_error(LOG_LEVEL_CONNECT, "Accepted connection from %s on socket %d",
4822 csp->ip_addr_str, csp->cfd);
4826 unsigned int latency;
4828 #ifdef FEATURE_HTTPS_INSPECTION
4829 if (continue_chatting && client_use_ssl(csp))
4831 continue_https_chat(csp);
4840 * If the request has been crunched,
4841 * the calculated latency is zero.
4843 latency = (unsigned)(csp->server_connection.response_received -
4844 csp->server_connection.request_sent) / 2;
4846 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
4847 && (csp->flags & CSP_FLAG_CRUNCHED)
4848 && (csp->expected_client_content_length != 0))
4850 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
4851 log_error(LOG_LEVEL_CONNECT,
4852 "Tainting client socket %d due to unread data.", csp->cfd);
4855 continue_chatting = (csp->config->feature_flags
4856 & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
4857 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
4858 && (csp->cfd != JB_INVALID_SOCKET)
4859 && (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
4860 && ((csp->flags & CSP_FLAG_SERVER_CONTENT_LENGTH_SET)
4861 || (csp->flags & CSP_FLAG_CHUNKED));
4863 if (!(csp->flags & CSP_FLAG_CRUNCHED)
4864 && (csp->server_connection.sfd != JB_INVALID_SOCKET))
4866 if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
4868 csp->server_connection.keep_alive_timeout = csp->config->default_server_timeout;
4870 if (!(csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
4871 || (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
4872 || !socket_is_still_alive(csp->server_connection.sfd)
4873 || !(latency < csp->server_connection.keep_alive_timeout))
4875 log_error(LOG_LEVEL_CONNECT,
4876 "Closing server socket %d connected to %s. "
4877 "Keep-alive: %u. Tainted: %u. Socket alive: %u. Timeout: %u.",
4878 csp->server_connection.sfd, (csp->server_connection.host != NULL) ?
4879 csp->server_connection.host : csp->http->host,
4880 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
4881 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
4882 socket_is_still_alive(csp->server_connection.sfd),
4883 csp->server_connection.keep_alive_timeout);
4884 #ifdef FEATURE_CONNECTION_SHARING
4885 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
4887 forget_connection(csp->server_connection.sfd);
4889 #endif /* def FEATURE_CONNECTION_SHARING */
4890 #ifdef FEATURE_HTTPS_INSPECTION
4891 close_server_ssl_connection(csp);
4893 close_socket(csp->server_connection.sfd);
4894 mark_connection_closed(&csp->server_connection);
4895 #ifdef FEATURE_HTTPS_INSPECTION
4896 if (continue_chatting && client_use_ssl(csp))
4899 * Close the client socket as well as Privoxy currently
4900 * can't establish a new server connection when the client
4901 * socket is reused and would drop the connection in
4902 * continue_https_chat() anyway.
4904 continue_chatting = 0;
4905 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
4906 log_error(LOG_LEVEL_CONNECT,
4907 "Client socket %d is no longer usable. "
4908 "The server socket has been closed.", csp->cfd);
4914 if (continue_chatting && any_loaded_file_changed(csp))
4916 continue_chatting = 0;
4917 config_file_change_detected = 1;
4919 #ifdef FEATURE_HTTPS_INSPECTION
4920 if (continue_chatting && client_use_ssl(csp) &&
4921 csp->ssl_with_client_is_opened == 0)
4923 continue_chatting = 0;
4924 log_error(LOG_LEVEL_CONNECT, "Client socket %d is no longer usable. "
4925 "The TLS session has been terminated.", csp->cfd);
4929 if (continue_chatting)
4931 if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) != 0)
4932 && socket_is_still_alive(csp->cfd))
4934 log_error(LOG_LEVEL_CONNECT, "Client request %d has been "
4935 "pipelined on socket %d and the socket is still alive.",
4936 csp->requests_received_total+1, csp->cfd);
4937 prepare_csp_for_next_request(csp);
4941 if (0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE))
4943 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
4945 log_error(LOG_LEVEL_CONNECT,
4946 "Waiting for the next client request on socket %d. "
4947 "Keeping the server socket %d to %s open.",
4948 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
4952 log_error(LOG_LEVEL_CONNECT,
4953 "Waiting for the next client request on socket %d. "
4954 "No server socket to keep open.", csp->cfd);
4958 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
4959 && data_is_available(csp->cfd, (int)csp->config->keep_alive_timeout)
4960 && socket_is_still_alive(csp->cfd))
4962 log_error(LOG_LEVEL_CONNECT,
4963 "Data arrived in time on client socket %d. Requests so far: %u",
4964 csp->cfd, csp->requests_received_total);
4965 prepare_csp_for_next_request(csp);
4969 #ifdef FEATURE_CONNECTION_SHARING
4970 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
4971 && (csp->server_connection.sfd != JB_INVALID_SOCKET)
4972 && (socket_is_still_alive(csp->server_connection.sfd))
4973 #ifdef FEATURE_HTTPS_INSPECTION
4974 && !server_use_ssl(csp)
4978 time_t time_open = time(NULL) - csp->server_connection.timestamp;
4980 if (csp->server_connection.keep_alive_timeout < time_open - (time_t)latency)
4985 remember_connection(&csp->server_connection);
4986 csp->server_connection.sfd = JB_INVALID_SOCKET;
4987 drain_and_close_socket(csp->cfd);
4988 csp->cfd = JB_INVALID_SOCKET;
4989 privoxy_mutex_lock(&connection_reuse_mutex);
4990 if (!monitor_thread_running)
4992 monitor_thread_running = 1;
4993 privoxy_mutex_unlock(&connection_reuse_mutex);
4994 wait_for_alive_connections();
4995 privoxy_mutex_lock(&connection_reuse_mutex);
4996 monitor_thread_running = 0;
4998 privoxy_mutex_unlock(&connection_reuse_mutex);
5000 #endif /* def FEATURE_CONNECTION_SHARING */
5004 else if (csp->server_connection.sfd != JB_INVALID_SOCKET)
5006 log_error(LOG_LEVEL_CONNECT,
5007 "Closing server socket %d connected to %s. Keep-alive: %u. "
5008 "Tainted: %u. Socket alive: %u. Timeout: %u. "
5009 "Configuration file change detected: %u",
5010 csp->server_connection.sfd, csp->server_connection.host,
5011 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
5012 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
5013 socket_is_still_alive(csp->server_connection.sfd),
5014 csp->server_connection.keep_alive_timeout,
5015 config_file_change_detected);
5017 } while (continue_chatting);
5021 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
5023 if (csp->cfd != JB_INVALID_SOCKET)
5025 log_error(LOG_LEVEL_CONNECT, "Closing client socket %d. "
5026 "Keep-alive: %u. Socket alive: %u. Data available: %u. "
5027 "Configuration file change detected: %u. Requests received: %u.",
5028 csp->cfd, 0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE),
5029 socket_is_still_alive(csp->cfd), data_is_available(csp->cfd, 0),
5030 config_file_change_detected, csp->requests_received_total);
5031 #ifdef FEATURE_HTTPS_INSPECTION
5032 close_client_ssl_connection(csp);
5034 drain_and_close_socket(csp->cfd);
5037 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
5039 #ifdef FEATURE_CONNECTION_SHARING
5040 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
5042 forget_connection(csp->server_connection.sfd);
5044 #endif /* def FEATURE_CONNECTION_SHARING */
5046 #ifdef FEATURE_HTTPS_INSPECTION
5047 close_server_ssl_connection(csp);
5048 #endif /* def FEATURE_HTTPS_INSPECTION */
5050 close_socket(csp->server_connection.sfd);
5053 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
5054 mark_connection_closed(&csp->server_connection);
5057 free_csp_resources(csp);
5059 csp->flags &= ~CSP_FLAG_ACTIVE;
5065 /*********************************************************************
5067 * Function : server_thread
5069 * Description : We only exist to call `serve' in a threaded environment.
5072 * 1 : data = Current client state (buffers, headers, etc...)
5074 * Returns : Always 0.
5076 *********************************************************************/
5077 static int32 server_thread(void *data)
5079 serve((struct client_state *) data);
5086 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
5087 /*********************************************************************
5091 * Description : Print usage info & exit.
5093 * Parameters : Pointer to argv[0] for identifying ourselves
5097 *********************************************************************/
5098 static void usage(const char *name)
5100 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
5101 "Usage: %s [--config-test] "
5104 #endif /* defined(unix) */
5107 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
5108 #endif /* defined(unix) */
5109 "[--version] [configfile]\n",
5113 show_fuzz_usage(name);
5116 printf("Aborting\n");
5121 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
5124 #ifdef MUTEX_LOCKS_AVAILABLE
5125 /*********************************************************************
5127 * Function : privoxy_mutex_lock
5129 * Description : Locks a mutex.
5132 * 1 : mutex = The mutex to lock.
5134 * Returns : Void. May exit in case of errors.
5136 *********************************************************************/
5137 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
5139 #ifdef FEATURE_PTHREAD
5140 int err = pthread_mutex_lock(mutex);
5143 if (mutex != &log_mutex)
5145 log_error(LOG_LEVEL_FATAL,
5146 "Mutex locking failed: %s.\n", strerror(err));
5151 EnterCriticalSection(mutex);
5152 #endif /* def FEATURE_PTHREAD */
5156 /*********************************************************************
5158 * Function : privoxy_mutex_unlock
5160 * Description : Unlocks a mutex.
5163 * 1 : mutex = The mutex to unlock.
5165 * Returns : Void. May exit in case of errors.
5167 *********************************************************************/
5168 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
5170 #ifdef FEATURE_PTHREAD
5171 int err = pthread_mutex_unlock(mutex);
5174 if (mutex != &log_mutex)
5176 log_error(LOG_LEVEL_FATAL,
5177 "Mutex unlocking failed: %s.\n", strerror(err));
5182 LeaveCriticalSection(mutex);
5183 #endif /* def FEATURE_PTHREAD */
5187 /*********************************************************************
5189 * Function : privoxy_mutex_init
5191 * Description : Prepares a mutex.
5194 * 1 : mutex = The mutex to initialize.
5196 * Returns : Void. May exit in case of errors.
5198 *********************************************************************/
5199 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
5201 #ifdef FEATURE_PTHREAD
5202 int err = pthread_mutex_init(mutex, 0);
5205 printf("Fatal error. Mutex initialization failed: %s.\n",
5210 InitializeCriticalSection(mutex);
5211 #endif /* def FEATURE_PTHREAD */
5213 #endif /* def MUTEX_LOCKS_AVAILABLE */
5215 /*********************************************************************
5217 * Function : initialize_mutexes
5219 * Description : Prepares mutexes if mutex support is available.
5223 * Returns : Void, exits in case of errors.
5225 *********************************************************************/
5226 static void initialize_mutexes(void)
5228 #ifdef MUTEX_LOCKS_AVAILABLE
5230 * Prepare global mutex semaphores
5233 #ifdef FEATURE_HTTPS_INSPECTION
5234 privoxy_mutex_init(&certificate_mutex);
5235 privoxy_mutex_init(&ssl_init_mutex);
5238 privoxy_mutex_init(&log_mutex);
5239 privoxy_mutex_init(&log_init_mutex);
5240 privoxy_mutex_init(&connection_reuse_mutex);
5241 #ifdef FEATURE_EXTERNAL_FILTERS
5242 privoxy_mutex_init(&external_filter_mutex);
5244 #ifdef FEATURE_CLIENT_TAGS
5245 privoxy_mutex_init(&client_tags_mutex);
5247 #ifdef FEATURE_EXTENDED_STATISTICS
5248 privoxy_mutex_init(&filter_statistics_mutex);
5249 privoxy_mutex_init(&block_statistics_mutex);
5253 * XXX: The assumptions below are a bit naive
5254 * and can cause locks that aren't necessary.
5256 * For example older FreeBSD versions (< 6.x?)
5257 * have no gethostbyname_r, but gethostbyname is
5260 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
5261 privoxy_mutex_init(&resolver_mutex);
5262 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
5264 * XXX: should we use a single mutex for
5265 * localtime() and gmtime() as well?
5267 #ifndef HAVE_GMTIME_R
5268 privoxy_mutex_init(&gmtime_mutex);
5269 #endif /* ndef HAVE_GMTIME_R */
5271 #ifndef HAVE_LOCALTIME_R
5272 privoxy_mutex_init(&localtime_mutex);
5273 #endif /* ndef HAVE_GMTIME_R */
5275 #if !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM)
5276 privoxy_mutex_init(&rand_mutex);
5277 #endif /* !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM) */
5279 #endif /* def MUTEX_LOCKS_AVAILABLE */
5282 /*********************************************************************
5286 * Description : Load the config file and start the listen loop.
5287 * This function is a lot more *sane* with the `load_config'
5288 * and `listen_loop' functions; although it stills does
5289 * a *little* too much for my taste.
5292 * 1 : argc = Number of parameters (including $0).
5293 * 2 : argv = Array of (char *)'s to the parameters.
5295 * Returns : 1 if : can't open config file, unrecognized directive,
5296 * stats requested in multi-thread mode, can't open the
5297 * log file, can't open the jar file, listen port is invalid,
5298 * any load fails, and can't bind port.
5300 * Else main never returns, the process must be signaled
5301 * to terminate execution. Or, on Windows, use the
5302 * "File", "Exit" menu option.
5304 *********************************************************************/
5306 int real_main(int argc, char **argv)
5308 int main(int argc, char **argv)
5312 int do_config_test = 0;
5313 #ifndef HAVE_ARC4RANDOM
5314 unsigned int random_seed;
5317 struct passwd *pw = NULL;
5318 struct group *grp = NULL;
5320 char *pre_chroot_nslookup_to_load_resolver = NULL;
5323 char *fuzz_input_type = NULL;
5324 char *fuzz_input_file = NULL;
5331 #if !defined(_WIN32)
5338 /* Prepare mutexes if supported and necessary. */
5339 initialize_mutexes();
5341 /* Enable logging until further notice. */
5345 * Parse the command line arguments
5347 * XXX: simply printing usage information in case of
5348 * invalid arguments isn't particularly user friendly.
5350 while (++argc_pos < argc)
5353 /* Check to see if the service must be installed or uninstalled */
5354 if (strncmp(argv[argc_pos], "--install", 9) == 0)
5356 const char *pName = argv[argc_pos] + 9;
5359 exit((install_service(pName)) ? 0 : 1);
5361 else if (strncmp(argv[argc_pos], "--uninstall", 11) == 0)
5363 const char *pName = argv[argc_pos] + 11;
5366 exit((uninstall_service(pName)) ? 0 : 1);
5368 else if (strcmp(argv[argc_pos], "--service") == 0)
5370 bRunAsService = TRUE;
5371 w32_set_service_cwd();
5372 atexit(w32_service_exit_notify);
5375 #endif /* defined(_WIN32) */
5378 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
5380 if (strcmp(argv[argc_pos], "--help") == 0)
5385 else if (strcmp(argv[argc_pos], "--version") == 0)
5387 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
5393 else if (strcmp(argv[argc_pos], "--no-daemon") == 0)
5395 set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
5399 else if (strcmp(argv[argc_pos], "--pidfile") == 0)
5401 if (++argc_pos == argc) usage(argv[0]);
5402 pidfile = strdup_or_die(argv[argc_pos]);
5405 else if (strcmp(argv[argc_pos], "--user") == 0)
5410 if (++argc_pos == argc) usage(argv[argc_pos]);
5412 user_arg = strdup_or_die(argv[argc_pos]);
5413 group_name = strchr(user_arg, '.');
5414 if (NULL != group_name)
5416 /* Nul-terminate the user name */
5419 /* Skip the former delimiter to actually reach the group name */
5422 grp = getgrnam(group_name);
5425 log_error(LOG_LEVEL_FATAL, "Group '%s' not found.", group_name);
5428 pw = getpwnam(user_arg);
5431 log_error(LOG_LEVEL_FATAL, "User '%s' not found.", user_arg);
5437 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup") == 0)
5439 if (++argc_pos == argc) usage(argv[0]);
5440 pre_chroot_nslookup_to_load_resolver = strdup_or_die(argv[argc_pos]);
5443 else if (strcmp(argv[argc_pos], "--chroot") == 0)
5447 #endif /* defined(unix) */
5449 else if (strcmp(argv[argc_pos], "--config-test") == 0)
5454 else if (strcmp(argv[argc_pos], "--fuzz") == 0)
5457 if (argc < argc_pos + 2) usage(argv[0]);
5458 fuzz_input_type = argv[argc_pos];
5460 fuzz_input_file = argv[argc_pos];
5462 else if (strcmp(argv[argc_pos], "--stfu") == 0)
5464 set_debug_level(LOG_LEVEL_STFU);
5467 else if (argc_pos + 1 != argc)
5470 * This is neither the last command line
5471 * option, nor was it recognized before,
5472 * therefore it must be invalid.
5478 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
5480 configfile = argv[argc_pos];
5483 } /* -END- while (more arguments) */
5485 show_version(Argv[0]);
5488 if (*configfile != '/')
5490 char cwd[BUFFER_SIZE];
5492 size_t abs_file_size;
5494 /* make config-filename absolute here */
5495 if (NULL == getcwd(cwd, sizeof(cwd)))
5497 perror("failed to get current working directory");
5501 basedir = strdup_or_die(cwd);
5503 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
5504 abs_file = malloc_or_die(abs_file_size);
5505 strlcpy(abs_file, basedir, abs_file_size);
5506 strlcat(abs_file, "/", abs_file_size);
5507 strlcat(abs_file, configfile, abs_file_size);
5508 configfile = abs_file;
5510 #endif /* defined unix */
5514 clients->next = NULL;
5516 /* XXX: factor out initialising after the next stable release. */
5521 #ifndef HAVE_ARC4RANDOM
5522 random_seed = (unsigned int)time(NULL);
5524 srandom(random_seed);
5527 #endif /* ifdef HAVE_RANDOM */
5528 #endif /* ifndef HAVE_ARC4RANDOM */
5531 * Unix signal handling
5533 * Catch the abort, interrupt and terminate signals for a graceful exit
5534 * Catch the hangup signal so the errlog can be reopened.
5536 * Ignore the broken pipe signal as connection failures
5537 * are handled when and where they occur without relying
5540 #if !defined(_WIN32)
5543 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP };
5545 for (idx = 0; idx < SZ(catched_signals); idx++)
5547 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
5548 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
5550 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
5551 #endif /* ifdef sun */
5553 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
5557 if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
5559 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for SIGPIPE: %E");
5563 #else /* ifdef _WIN32 */
5564 # ifdef _WIN_CONSOLE
5566 * We *are* in a windows console app.
5567 * Print a verbose messages about FAQ's and such
5569 printf("%s", win32_blurb);
5570 # endif /* def _WIN_CONSOLE */
5571 #endif /* def _WIN32 */
5574 if (fuzz_input_type != NULL)
5576 exit(process_fuzzed_input(fuzz_input_type, fuzz_input_file));
5578 log_error(LOG_LEVEL_FATAL,
5579 "When compiled with fuzzing support, Privoxy should only be used for fuzzing. "
5580 "Various data structures are static which is unsafe when using threads.");
5585 exit(NULL == load_config());
5588 /* Initialize the CGI subsystem */
5589 cgi_init_error_messages();
5592 * If running on unix and without the --no-daemon
5593 * option, become a daemon. I.e. fork, detach
5594 * from tty and get process group leadership
5603 if (pid < 0) /* error */
5608 else if (pid != 0) /* parent */
5613 * must check for errors
5614 * child died due to missing files aso
5617 wpid = waitpid(pid, &status, WNOHANG);
5629 * stderr (fd 2) will be closed later on,
5630 * when the config file has been parsed.
5636 * Reserve fd 0 and 1 to prevent abort() and friends
5637 * from sending stuff to the clients or servers.
5639 fd = open("/dev/null", O_RDONLY);
5642 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
5646 if (dup2(fd, 0) == -1)
5648 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 0: %E");
5652 fd = open("/dev/null", O_WRONLY);
5655 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
5659 if (dup2(fd, 1) == -1)
5661 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 1: %E");
5666 #ifdef FEATURE_EXTERNAL_FILTERS
5667 for (fd = 0; fd < 3; fd++)
5669 mark_socket_for_close_on_execute(fd);
5673 if (chdir("/") != 0)
5675 log_error(LOG_LEVEL_FATAL, "Failed to cd into '/': %E");
5678 } /* -END- if (daemon_mode) */
5681 * As soon as we have written the PID file, we can switch
5682 * to the user and group ID indicated by the --user option
5684 if (pidfile != NULL)
5686 write_pid_file(pidfile);
5690 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
5692 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
5696 if (setgroups(1, &grp->gr_gid))
5698 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
5701 else if (initgroups(pw->pw_name, pw->pw_gid))
5703 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
5709 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
5711 /* Read the time zone file from /etc before doing chroot. */
5713 if (NULL != pre_chroot_nslookup_to_load_resolver
5714 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
5716 /* Initialize resolver library. */
5717 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
5719 if (chroot(pw->pw_dir) < 0)
5721 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
5725 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
5728 if (setuid(pw->pw_uid))
5730 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
5734 char putenv_dummy[64];
5736 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
5737 if (putenv(putenv_dummy) != 0)
5739 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
5742 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
5743 if (putenv(putenv_dummy) != 0)
5745 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
5751 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
5754 #endif /* defined unix */
5757 /* This will be FALSE unless the command line specified --service
5761 /* Yup, so now we must attempt to establish a connection
5762 * with the service dispatcher. This will only work if this
5763 * process was launched by the service control manager to
5764 * actually run as a service. If this isn't the case, i've
5765 * known it take around 30 seconds or so for the call to return.
5768 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
5769 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
5771 /* Service has run, and at this point is now being stopped, so just return */
5776 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
5778 /* An error occurred. Usually it's because --service was wrongly specified
5779 * and we were unable to connect to the Service Control Dispatcher because
5780 * it wasn't expecting us and is therefore not listening.
5782 * For now, just continue below to call the listen_loop function.
5785 #endif /* def _WIN32 */
5795 /*********************************************************************
5797 * Function : bind_port_helper
5799 * Description : Bind the listen port. Handles logging, and aborts
5803 * 1 : haddr = Host address to bind to. Use NULL to bind to
5805 * 2 : hport = Specifies port to bind to.
5806 * 3 : backlog = Listen backlog.
5808 * Returns : Port that was opened.
5810 *********************************************************************/
5811 static jb_socket bind_port_helper(const char *haddr, int hport, int backlog)
5816 result = bind_port(haddr, hport, backlog, &bfd);
5820 const char *bind_address = (NULL != haddr) ? haddr : "INADDR_ANY";
5824 log_error(LOG_LEVEL_FATAL,
5825 "can't bind to %s:%d: There may be another Privoxy "
5826 "or some other proxy running on port %d",
5827 bind_address, hport, hport);
5831 log_error(LOG_LEVEL_FATAL,
5832 "can't bind to %s:%d: The hostname is not resolvable",
5833 bind_address, hport);
5837 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: %E",
5838 bind_address, hport);
5842 /* shouldn't get here */
5843 return JB_INVALID_SOCKET;
5848 if (bfd >= FD_SETSIZE)
5850 log_error(LOG_LEVEL_FATAL,
5851 "Bind socket number too high to use select(): %d >= %d",
5859 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
5864 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
5872 /*********************************************************************
5874 * Function : bind_ports_helper
5876 * Description : Bind the listen ports. Handles logging, and aborts
5880 * 1 : config = Privoxy configuration. Specifies ports
5882 * 2 : sockets = Preallocated array of opened sockets
5883 * corresponding to specification in config.
5884 * All non-opened sockets will be set to
5885 * JB_INVALID_SOCKET.
5887 * Returns : Nothing. Inspect sockets argument.
5889 *********************************************************************/
5890 static void bind_ports_helper(struct configuration_spec * config,
5891 jb_socket sockets[])
5895 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
5897 if (config->hport[i])
5899 sockets[i] = bind_port_helper(config->haddr[i],
5900 config->hport[i], config->listen_backlog);
5901 #if defined(FEATURE_ACCEPT_FILTER) && defined(SO_ACCEPTFILTER)
5902 if (config->enable_accept_filter && sockets[i] != JB_INVALID_SOCKET)
5904 struct accept_filter_arg af_options;
5905 bzero(&af_options, sizeof(af_options));
5906 strlcpy(af_options.af_name, "httpready", sizeof(af_options.af_name));
5907 if (setsockopt(sockets[i], SOL_SOCKET, SO_ACCEPTFILTER, &af_options,
5908 sizeof(af_options)))
5910 log_error(LOG_LEVEL_ERROR,
5911 "Enabling accept filter for socket %d failed: %E", sockets[i]);
5918 sockets[i] = JB_INVALID_SOCKET;
5921 config->need_bind = 0;
5925 /*********************************************************************
5927 * Function : close_ports_helper
5929 * Description : Close listenings ports.
5932 * 1 : sockets = Array of opened and non-opened sockets to
5933 * close. All sockets will be set to
5934 * JB_INVALID_SOCKET.
5936 * Returns : Nothing.
5938 *********************************************************************/
5939 static void close_ports_helper(jb_socket sockets[])
5943 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
5945 if (JB_INVALID_SOCKET != sockets[i])
5947 close_socket(sockets[i]);
5949 sockets[i] = JB_INVALID_SOCKET;
5955 /* Without this simple workaround we get this compiler warning from _beginthread
5956 * warning C4028: formal parameter 1 different from declaration
5958 void w32_service_listen_loop(void *p)
5962 #endif /* def _WIN32 */
5965 /*********************************************************************
5967 * Function : listen_loop
5969 * Description : bind the listen port and enter a "FOREVER" listening loop.
5975 *********************************************************************/
5976 static void listen_loop(void)
5978 struct client_states *csp_list = NULL;
5979 struct client_state *csp = NULL;
5980 jb_socket bfds[MAX_LISTENING_SOCKETS];
5981 struct configuration_spec *config;
5982 unsigned int active_threads = 0;
5983 #if defined(FEATURE_PTHREAD)
5984 pthread_attr_t attrs;
5986 pthread_attr_init(&attrs);
5987 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
5990 config = load_config();
5992 #ifdef FEATURE_CONNECTION_SHARING
5994 * XXX: Should be relocated once it no
5995 * longer needs to emit log messages.
5997 initialize_reusable_connections();
5998 #endif /* def FEATURE_CONNECTION_SHARING */
6000 bind_ports_helper(config, bfds);
6002 #ifdef FEATURE_GRACEFUL_TERMINATION
6003 while (!g_terminate)
6008 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__)
6009 while (waitpid(-1, NULL, WNOHANG) > 0)
6011 /* zombie children */
6013 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) */
6016 * Free data that was used by died threads
6018 active_threads = sweep();
6022 * Re-open the errlog after HUP signal
6024 if (received_hup_signal)
6026 if (NULL != config->logfile)
6028 init_error_log(Argv[0], config->logfile);
6030 received_hup_signal = 0;
6034 csp_list = zalloc_or_die(sizeof(*csp_list));
6035 csp = &csp_list->csp;
6037 log_error(LOG_LEVEL_CONNECT,
6038 "Waiting for the next client connection. Currently active threads: %u",
6042 * This config may be outdated, but for accept_connection()
6043 * it's fresh enough.
6045 csp->config = config;
6047 if (!accept_connection(csp, bfds))
6049 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
6054 csp->flags |= CSP_FLAG_ACTIVE;
6055 csp->server_connection.sfd = JB_INVALID_SOCKET;
6057 csp->config = config = load_config();
6059 if (config->need_bind)
6062 * Since we were listening to the "old port", we will not see
6063 * a "listen" param change until the next request. So, at
6064 * least 1 more request must be made for us to find the new
6065 * setting. I am simply closing the old socket and binding the
6068 * Which-ever is correct, we will serve 1 more page via the
6069 * old settings. This should probably be a "show-status"
6070 * request. This should not be a so common of an operation
6071 * that this will hurt people's feelings.
6074 close_ports_helper(bfds);
6076 bind_ports_helper(config, bfds);
6079 #ifdef FEATURE_TOGGLE
6080 if (global_toggle_state)
6081 #endif /* def FEATURE_TOGGLE */
6083 csp->flags |= CSP_FLAG_TOGGLED_ON;
6086 if (run_loader(csp))
6088 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
6089 /* Never get here - LOG_LEVEL_FATAL causes program exit */
6093 if (block_acl(NULL,csp))
6095 log_error(LOG_LEVEL_CONNECT,
6096 "Connection from %s on %s (socket %d) dropped due to ACL",
6097 csp->ip_addr_str, csp->listen_addr_str, csp->cfd);
6098 close_socket(csp->cfd);
6099 freez(csp->ip_addr_str);
6100 freez(csp->listen_addr_str);
6104 #endif /* def FEATURE_ACL */
6106 if ((0 != config->max_client_connections)
6107 && (active_threads >= config->max_client_connections))
6109 log_error(LOG_LEVEL_ERROR,
6110 "Rejecting connection from %s. Maximum number of connections reached.",
6112 write_socket_delayed(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
6113 strlen(TOO_MANY_CONNECTIONS_RESPONSE), get_write_delay(csp));
6114 close_socket(csp->cfd);
6115 freez(csp->ip_addr_str);
6116 freez(csp->listen_addr_str);
6121 /* add it to the list of clients */
6122 csp_list->next = clients->next;
6123 clients->next = csp_list;
6125 if (config->multi_threaded)
6129 /* this is a switch () statement in the C preprocessor - ugh */
6130 #undef SELECTED_ONE_OPTION
6132 /* Use Pthreads in preference to native code */
6133 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
6134 #define SELECTED_ONE_OPTION
6136 pthread_t the_thread;
6139 ret = pthread_create(&the_thread, &attrs,
6140 (void * (*)(void *))serve, csp);
6141 child_id = ret ? -1 : 0;
6145 #if defined(_WIN32) && !defined(SELECTED_ONE_OPTION)
6146 #define SELECTED_ONE_OPTION
6147 child_id = _beginthread(
6148 (void (*)(void *))serve,
6153 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
6154 #define SELECTED_ONE_OPTION
6156 thread_id tid = spawn_thread
6157 (server_thread, "server", B_NORMAL_PRIORITY, csp);
6159 if ((tid >= 0) && (resume_thread(tid) == B_OK))
6161 child_id = (int) tid;
6170 #if !defined(SELECTED_ONE_OPTION)
6173 /* This block is only needed when using fork().
6174 * When using threads, the server thread was
6175 * created and run by the call to _beginthread().
6177 if (child_id == 0) /* child */
6180 #ifdef FEATURE_TOGGLE
6181 int inherited_toggle_state = global_toggle_state;
6182 #endif /* def FEATURE_TOGGLE */
6187 * If we've been toggled or we've blocked the request, tell Mom
6190 #ifdef FEATURE_TOGGLE
6191 if (inherited_toggle_state != global_toggle_state)
6193 rc |= RC_FLAG_TOGGLED;
6195 #endif /* def FEATURE_TOGGLE */
6197 #ifdef FEATURE_STATISTICS
6198 if (csp->flags & CSP_FLAG_REJECTED)
6200 rc |= RC_FLAG_BLOCKED;
6202 #endif /* ndef FEATURE_STATISTICS */
6206 else if (child_id > 0) /* parent */
6208 /* in a fork()'d environment, the parent's
6209 * copy of the client socket and the CSP
6213 #if !defined(_WIN32) && !defined(__CYGWIN__)
6215 wait(&child_status);
6218 * Evaluate child's return code: If the child has
6219 * - been toggled, toggle ourselves
6220 * - blocked its request, bump up the stats counter
6223 #ifdef FEATURE_TOGGLE
6224 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
6226 global_toggle_state = !global_toggle_state;
6228 #endif /* def FEATURE_TOGGLE */
6230 #ifdef FEATURE_STATISTICS
6232 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
6236 #endif /* def FEATURE_STATISTICS */
6238 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
6239 close_socket(csp->cfd);
6240 csp->flags &= ~CSP_FLAG_ACTIVE;
6244 #undef SELECTED_ONE_OPTION
6245 /* end of cpp switch () */
6250 * Spawning the child failed, assume it's because
6251 * there are too many children running already.
6252 * XXX: If you assume ...
6254 log_error(LOG_LEVEL_ERROR,
6255 "Unable to take any additional connections: %E. Active threads: %u",
6257 write_socket_delayed(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
6258 strlen(TOO_MANY_CONNECTIONS_RESPONSE), get_write_delay(csp));
6259 close_socket(csp->cfd);
6260 csp->flags &= ~CSP_FLAG_ACTIVE;
6269 #if defined(FEATURE_PTHREAD)
6270 pthread_attr_destroy(&attrs);
6273 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
6275 #ifdef FEATURE_GRACEFUL_TERMINATION
6277 log_error(LOG_LEVEL_INFO, "Graceful termination requested.");
6279 unload_current_config_file();
6280 unload_current_actions_file();
6281 unload_current_re_filterfile();
6282 #ifdef FEATURE_TRUST
6283 unload_current_trust_file();
6286 if (config->multi_threaded)
6293 } while ((clients->next != NULL) && (--i > 0));
6297 log_error(LOG_LEVEL_ERROR, "Graceful termination failed "
6298 "- still some live clients after 1 minute wait.");
6308 #ifdef FEATURE_HTTPS_INSPECTION
6310 * Only release TLS backed resources if there
6311 * are no active connections left.
6313 if (clients->next == NULL)
6319 log_error(LOG_LEVEL_INFO, "Exiting gracefully.");
6321 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
6322 /* Cleanup - remove taskbar icon etc. */
6327 #endif /* FEATURE_GRACEFUL_TERMINATION */