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 "Client headers did not arrive in time. Timeout: %d",
1839 csp->config->socket_timeout);
1840 destroy_list(headers);
1841 return JB_ERR_PARSE;
1844 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1847 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1848 destroy_list(headers);
1849 return JB_ERR_PARSE;
1852 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
1855 * If there is no memory left for buffering the
1856 * request, there is nothing we can do but hang up
1858 destroy_list(headers);
1859 return JB_ERR_MEMORY;
1864 if (!strncmpic(p, "Transfer-Encoding:", 18))
1867 * XXX: should be called through sed()
1868 * but currently can't.
1870 client_transfer_encoding(csp, &p);
1873 * We were able to read a complete
1874 * header and can finally enlist it.
1881 if (http->host == NULL)
1884 * If we still don't know the request destination,
1885 * the request is invalid or the client uses
1886 * Privoxy without its knowledge.
1888 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1891 * Our attempts to get the request destination
1892 * elsewhere failed or Privoxy is configured
1893 * to only accept proxy requests.
1895 * An error response has already been sent
1896 * and we're done here.
1898 return JB_ERR_PARSE;
1902 #ifdef FEATURE_CLIENT_TAGS
1903 /* XXX: If the headers were enlisted sooner, passing csp would do. */
1904 set_client_address(csp, headers);
1905 get_tag_list_for_client(csp->client_tags, csp->client_address);
1909 * Determine the actions for this URL
1911 #ifdef FEATURE_TOGGLE
1912 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1914 /* Most compatible set of actions (i.e. none) */
1915 init_current_action(csp->action);
1918 #endif /* ndef FEATURE_TOGGLE */
1920 get_url_actions(csp, http);
1923 enlist(csp->headers, http->cmd);
1925 /* Append the previously read headers */
1926 err = list_append_list_unique(csp->headers, headers);
1927 destroy_list(headers);
1934 /*********************************************************************
1936 * Function : parse_client_request
1938 * Description : Parses the client's request and decides what to do
1941 * Note that since we're not using select() we could get
1942 * blocked here if a client connected, then didn't say
1946 * 1 : csp = Current client state (buffers, headers, etc...)
1948 * Returns : JB_ERR_OK or JB_ERR_PARSE
1950 *********************************************************************/
1951 static jb_err parse_client_request(struct client_state *csp)
1953 struct http_request *http = csp->http;
1956 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1957 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
1958 && (!strcmpic(csp->http->version, "HTTP/1.1"))
1959 && (csp->http->ssl == 0))
1961 /* Assume persistence until further notice */
1962 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
1964 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1966 if (csp->http->ssl == 0)
1969 * This whole block belongs to chat() but currently
1970 * has to be executed before sed().
1972 if (csp->flags & CSP_FLAG_CHUNKED_CLIENT_BODY)
1974 if (receive_chunked_client_request_body(csp) != JB_ERR_OK)
1976 return JB_ERR_PARSE;
1981 csp->expected_client_content_length = get_expected_content_length(csp->headers);
1983 verify_request_length(csp);
1985 #ifndef FEATURE_HTTPS_INSPECTION
1988 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1992 err = sed(csp, FILTER_CLIENT_HEADERS);
1993 if (JB_ERR_OK != err)
1995 log_error(LOG_LEVEL_ERROR, "Failed to parse client request from %s.",
1997 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1998 csp->ip_addr_str, csp->http->cmd);
1999 write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER), get_write_delay(csp));
2000 return JB_ERR_PARSE;
2002 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2004 /* Check request line for rewrites. */
2005 if ((NULL == csp->headers->first->str)
2006 || (strcmp(http->cmd, csp->headers->first->str) &&
2007 (JB_ERR_OK != change_request_destination(csp))))
2010 * A header filter broke the request line - bail out.
2012 write_socket_delayed(csp->cfd, MESSED_UP_REQUEST_RESPONSE,
2013 strlen(MESSED_UP_REQUEST_RESPONSE), get_write_delay(csp));
2014 /* XXX: Use correct size */
2015 log_error(LOG_LEVEL_CLF,
2016 "%s - - [%T] \"Invalid request generated\" 400 0", csp->ip_addr_str);
2017 log_error(LOG_LEVEL_ERROR,
2018 "Invalid request line after applying header filters.");
2019 free_http_request(http);
2021 return JB_ERR_PARSE;
2024 if (client_has_unsupported_expectations(csp))
2026 return JB_ERR_PARSE;
2034 /*********************************************************************
2036 * Function : read_http_request_body
2038 * Description : Reads remaining request body from the client.
2041 * 1 : csp = Current client state (buffers, headers, etc...)
2043 * Returns : 0 on success, anything else is an error.
2045 *********************************************************************/
2046 static int read_http_request_body(struct client_state *csp)
2048 size_t to_read = csp->expected_client_content_length;
2051 assert(to_read != 0);
2053 /* check if all data has been already read */
2054 if (to_read <= (csp->client_iob->eod - csp->client_iob->cur))
2059 for (to_read -= (size_t)(csp->client_iob->eod - csp->client_iob->cur);
2060 to_read > 0 && data_is_available(csp->cfd, csp->config->socket_timeout);
2061 to_read -= (unsigned)len)
2063 char buf[BUFFER_SIZE];
2064 size_t max_bytes_to_read = to_read < sizeof(buf) ? to_read : sizeof(buf);
2066 log_error(LOG_LEVEL_CONNECT,
2067 "Waiting for up to %lu bytes of request body from the client.",
2069 len = read_socket(csp->cfd, buf, (int)max_bytes_to_read);
2072 log_error(LOG_LEVEL_CONNECT, "Failed receiving request body from %s: %E", csp->ip_addr_str);
2075 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, (char *)buf, len))
2079 assert(to_read >= len);
2084 log_error(LOG_LEVEL_CONNECT,
2085 "Not enough request body has been read: expected %lu more bytes",
2089 log_error(LOG_LEVEL_CONNECT,
2090 "The last %d bytes of the request body have been read", len);
2095 /*********************************************************************
2097 * Function : update_client_headers
2099 * Description : Updates the HTTP headers from the client request.
2102 * 1 : csp = Current client state (buffers, headers, etc...)
2103 * 2 : new_content_length = new content length value to set
2105 * Returns : 0 on success, anything else is an error.
2107 *********************************************************************/
2108 static int update_client_headers(struct client_state *csp, size_t new_content_length)
2110 static const char content_length[] = "Content-Length:";
2112 struct list_entry *p;
2114 #ifndef FEATURE_HTTPS_INSPECTION
2115 for (p = csp->headers->first;
2117 for (p = csp->http->client_ssl ? csp->https_headers->first : csp->headers->first;
2119 !updated && (p != NULL); p = p->next)
2121 /* Header crunch()ed in previous run? -> ignore */
2127 /* Does the current parser handle this header? */
2128 if (0 == strncmpic(p->str, content_length, sizeof(content_length) - 1))
2130 updated = (JB_ERR_OK == header_adjust_content_length((char **)&(p->str), new_content_length));
2142 /*********************************************************************
2144 * Function : can_filter_request_body
2146 * Description : Checks if the current request body can be stored in
2147 * the client_iob without hitting buffer limit.
2150 * 1 : csp = Current client state (buffers, headers, etc...)
2152 * Returns : TRUE if the current request size do not exceed buffer limit
2155 *********************************************************************/
2156 static int can_filter_request_body(const struct client_state *csp)
2158 if (!can_add_to_iob(csp->client_iob, csp->config->buffer_limit,
2159 csp->expected_client_content_length))
2161 log_error(LOG_LEVEL_INFO,
2162 "Not filtering request body from %s: buffer limit %lu will be exceeded "
2163 "(content length %llu)", csp->ip_addr_str, csp->config->buffer_limit,
2164 csp->expected_client_content_length);
2171 /*********************************************************************
2173 * Function : send_http_request
2175 * Description : Sends the HTTP headers from the client request
2176 * and all the body data that has already been received.
2179 * 1 : csp = Current client state (buffers, headers, etc...)
2181 * Returns : 0 on success, anything else is an error.
2183 *********************************************************************/
2184 static int send_http_request(struct client_state *csp)
2188 const char *to_send;
2190 int filter_client_body = csp->expected_client_content_length != 0 &&
2191 client_body_filters_enabled(csp->action) && can_filter_request_body(csp);
2193 if (filter_client_body)
2195 if (read_http_request_body(csp))
2199 to_send_len = csp->expected_client_content_length;
2200 to_send = execute_client_body_filters(csp, &to_send_len);
2201 if (to_send == NULL)
2203 /* just flush client_iob */
2204 filter_client_body = FALSE;
2206 else if (to_send_len != csp->expected_client_content_length &&
2207 update_client_headers(csp, to_send_len))
2209 log_error(LOG_LEVEL_HEADER, "Error updating client headers");
2213 csp->expected_client_content_length = 0;
2216 hdr = list_to_text(csp->headers);
2219 /* FIXME Should handle error properly */
2220 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2222 list_remove_all(csp->headers);
2225 * Write the client's (modified) header to the server
2226 * (along with anything else that may be in the buffer)
2228 write_failure = 0 != write_socket(csp->server_connection.sfd, hdr, strlen(hdr));
2233 log_error(LOG_LEVEL_CONNECT, "Failed sending request headers to: %s: %E",
2234 csp->http->hostport);
2235 if (filter_client_body)
2242 if (filter_client_body)
2244 write_failure = 0 != write_socket(csp->server_connection.sfd, to_send, to_send_len);
2248 log_error(LOG_LEVEL_CONNECT, "Failed sending filtered request body to: %s: %E",
2249 csp->http->hostport);
2254 if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) == 0)
2255 && (flush_iob(csp->server_connection.sfd, csp->client_iob, 0) < 0))
2257 log_error(LOG_LEVEL_CONNECT, "Failed sending request body to: %s: %E",
2258 csp->http->hostport);
2265 #ifdef FEATURE_HTTPS_INSPECTION
2266 /*********************************************************************
2268 * Function : read_https_request_body
2270 * Description : Reads remaining request body from the client.
2273 * 1 : csp = Current client state (buffers, headers, etc...)
2275 * Returns : 0 on success, anything else is an error.
2277 *********************************************************************/
2278 static int read_https_request_body(struct client_state *csp)
2280 size_t to_read = csp->expected_client_content_length;
2283 assert(to_read != 0);
2285 /* check if all data has been already read */
2286 if (to_read <= (csp->client_iob->eod - csp->client_iob->cur))
2291 for (to_read -= (size_t)(csp->client_iob->eod - csp->client_iob->cur);
2292 to_read > 0 && (is_ssl_pending(&(csp->ssl_client_attr)) ||
2293 data_is_available(csp->cfd, csp->config->socket_timeout));
2294 to_read -= (unsigned)len)
2296 unsigned char buf[BUFFER_SIZE];
2297 size_t max_bytes_to_read = to_read < sizeof(buf) ? to_read : sizeof(buf);
2299 log_error(LOG_LEVEL_CONNECT,
2300 "Waiting for up to %lu bytes of request body from the client.",
2302 len = ssl_recv_data(&(csp->ssl_client_attr), buf,
2303 (unsigned)max_bytes_to_read);
2306 log_error(LOG_LEVEL_CONNECT, "Failed receiving request body from %s", csp->ip_addr_str);
2309 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, (char *)buf, len))
2313 assert(to_read >= len);
2318 log_error(LOG_LEVEL_CONNECT,
2319 "Not enough request body has been read: expected %lu more bytes",
2324 log_error(LOG_LEVEL_CONNECT,
2325 "The last %llu bytes of the request body have been read",
2326 csp->expected_client_content_length);
2331 /*********************************************************************
2333 * Function : receive_and_send_encrypted_post_data
2335 * Description : Reads remaining request body from the client and sends
2339 * 1 : csp = Current client state (buffers, headers, etc...)
2341 * Returns : 0 on success, anything else is an error.
2343 *********************************************************************/
2344 static int receive_and_send_encrypted_post_data(struct client_state *csp)
2346 int content_length_known = csp->expected_client_content_length != 0;
2348 while (is_ssl_pending(&(csp->ssl_client_attr))
2349 || (content_length_known && csp->expected_client_content_length != 0))
2351 unsigned char buf[BUFFER_SIZE];
2353 int max_bytes_to_read = sizeof(buf);
2355 if (content_length_known && csp->expected_client_content_length < sizeof(buf))
2357 max_bytes_to_read = (int)csp->expected_client_content_length;
2359 log_error(LOG_LEVEL_CONNECT,
2360 "Waiting for up to %d bytes of request body from the client.",
2362 len = ssl_recv_data(&(csp->ssl_client_attr), buf,
2363 (unsigned)max_bytes_to_read);
2370 /* XXX: Does this actually happen? */
2373 log_error(LOG_LEVEL_CONNECT, "Forwarding %d bytes of encrypted request body",
2375 len = ssl_send_data(&(csp->ssl_server_attr), buf, (size_t)len);
2380 if (csp->expected_client_content_length != 0)
2382 if (csp->expected_client_content_length >= len)
2384 csp->expected_client_content_length -= (unsigned)len;
2386 if (csp->expected_client_content_length == 0)
2388 log_error(LOG_LEVEL_CONNECT, "Forwarded the last %d bytes", len);
2394 log_error(LOG_LEVEL_CONNECT, "Done forwarding encrypted request body");
2401 /*********************************************************************
2403 * Function : send_https_request
2405 * Description : Sends the HTTP headers from the client request
2406 * and all the body data that has already been received.
2409 * 1 : csp = Current client state (buffers, headers, etc...)
2411 * Returns : 0 on success, anything else is an error.
2413 *********************************************************************/
2414 static int send_https_request(struct client_state *csp)
2419 const char *to_send;
2421 int filter_client_body = csp->expected_client_content_length != 0 &&
2422 client_body_filters_enabled(csp->action) && can_filter_request_body(csp);
2424 if (filter_client_body)
2426 if (read_https_request_body(csp))
2430 to_send_len = csp->expected_client_content_length;
2431 to_send = execute_client_body_filters(csp, &to_send_len);
2432 if (to_send == NULL)
2434 /* just flush client_iob */
2435 filter_client_body = FALSE;
2437 else if (to_send_len != csp->expected_client_content_length &&
2438 update_client_headers(csp, to_send_len))
2440 log_error(LOG_LEVEL_HEADER, "Error updating client headers");
2443 csp->expected_client_content_length = 0;
2446 hdr = list_to_text(csp->https_headers);
2449 /* FIXME Should handle error properly */
2450 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2452 list_remove_all(csp->https_headers);
2455 * Write the client's (modified) header to the server
2456 * (along with anything else that may be in the buffer)
2458 ret = ssl_send_data(&(csp->ssl_server_attr),
2459 (const unsigned char *)hdr, strlen(hdr));
2464 log_error(LOG_LEVEL_CONNECT,
2465 "Failed sending encrypted request headers to: %s: %E",
2466 csp->http->hostport);
2467 mark_server_socket_tainted(csp);
2471 if (filter_client_body)
2473 ret = ssl_send_data(&(csp->ssl_server_attr), (const unsigned char *)to_send, to_send_len);
2477 log_error(LOG_LEVEL_CONNECT, "Failed sending filtered request body to: %s",
2478 csp->http->hostport);
2483 if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) == 0)
2484 && ((flushed = ssl_flush_socket(&(csp->ssl_server_attr),
2485 csp->client_iob)) < 0))
2487 log_error(LOG_LEVEL_CONNECT, "Failed sending request body to: %s: %E",
2488 csp->http->hostport);
2491 if (flushed != 0 || csp->expected_client_content_length != 0)
2493 if (csp->expected_client_content_length != 0)
2495 if (csp->expected_client_content_length < flushed)
2497 log_error(LOG_LEVEL_ERROR,
2498 "Flushed %ld bytes of request body while only expecting %llu",
2499 flushed, csp->expected_client_content_length);
2500 csp->expected_client_content_length = 0;
2504 log_error(LOG_LEVEL_CONNECT,
2505 "Flushed %ld bytes of request body while expecting %llu",
2506 flushed, csp->expected_client_content_length);
2507 csp->expected_client_content_length -= (unsigned)flushed;
2508 if (receive_and_send_encrypted_post_data(csp))
2516 log_error(LOG_LEVEL_CONNECT,
2517 "Flushed %ld bytes of request body", flushed);
2521 log_error(LOG_LEVEL_CONNECT, "Encrypted request sent");
2528 /*********************************************************************
2530 * Function : receive_encrypted_request_headers
2532 * Description : Receives the encrypted request headers when
2536 * 1 : csp = Current client state (buffers, headers, etc...)
2538 * Returns : JB_ERR_OK on success,
2539 * JB_ERR_PARSE or JB_ERR_MEMORY otherwise
2541 *********************************************************************/
2542 static jb_err receive_encrypted_request_headers(struct client_state *csp)
2544 char buf[BUFFER_SIZE];
2550 log_error(LOG_LEVEL_HEADER, "Waiting for encrypted client headers");
2551 if (!is_ssl_pending(&(csp->ssl_client_attr)) &&
2552 !data_is_available(csp->cfd, csp->config->socket_timeout))
2554 log_error(LOG_LEVEL_CONNECT,
2555 "Socket %d timed out while waiting for client headers", csp->cfd);
2556 return JB_ERR_PARSE;
2558 len = ssl_recv_data(&(csp->ssl_client_attr),
2559 (unsigned char *)buf, sizeof(buf));
2562 log_error(LOG_LEVEL_CONNECT,
2563 "Socket %d closed while waiting for client headers", csp->cfd);
2564 return JB_ERR_PARSE;
2568 return JB_ERR_PARSE;
2570 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
2572 return JB_ERR_MEMORY;
2574 p = strstr(csp->client_iob->cur, "\r\n\r\n");
2575 } while (p == NULL);
2577 log_error(LOG_LEVEL_HEADER, "Encrypted headers received completely");
2583 /*********************************************************************
2585 * Function : change_encrypted_request_destination
2587 * Description : Parse a (rewritten) request line from an encrypted
2588 * request and regenerate the http request data.
2591 * 1 : csp = Current client state (buffers, headers, etc...)
2593 * Returns : Forwards the parse_http_request() return code.
2594 * Terminates in case of memory problems.
2596 *********************************************************************/
2597 static jb_err change_encrypted_request_destination(struct client_state *csp)
2600 char *original_host = csp->http->host;
2601 int original_port = csp->http->port;
2603 log_error(LOG_LEVEL_REDIRECTS, "Rewrite detected: %s",
2604 csp->https_headers->first->str);
2605 csp->http->host = NULL;
2606 free_http_request(csp->http);
2607 err = parse_http_request(csp->https_headers->first->str, csp->http);
2608 if (JB_ERR_OK != err)
2610 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2611 jb_err_to_string(err));
2612 freez(original_host);
2616 if (csp->http->host == NULL)
2618 char port_string[10];
2620 * The rewritten request line did not specify a host
2621 * which means we can use the original host specified
2624 csp->http->host = original_host;
2625 csp->http->port = original_port;
2626 log_error(LOG_LEVEL_REDIRECTS, "Keeping the original host: %s",
2629 * If the rewritten request line didn't contain a host
2630 * it also didn't contain a port so we can reuse the host
2633 freez(csp->http->hostport);
2634 csp->http->hostport = strdup_or_die(csp->http->host);
2635 snprintf(port_string, sizeof(port_string), ":%d", original_port);
2636 err = string_append(&csp->http->hostport, port_string);
2637 if (err != JB_ERR_OK)
2639 log_error(LOG_LEVEL_ERROR, "Failed to rebuild hostport: %s.",
2640 jb_err_to_string(err));
2645 * While the request line didn't mention it,
2646 * we're https-inspecting and want to speak TLS
2649 csp->http->server_ssl = 1;
2654 /* The rewrite filter added a host so we can ditch the original */
2655 freez(original_host);
2656 csp->http->server_ssl = csp->http->ssl;
2659 csp->http->client_ssl = 1;
2661 freez(csp->https_headers->first->str);
2662 build_request_line(csp, NULL, &csp->https_headers->first->str);
2664 if (!server_use_ssl(csp))
2666 log_error(LOG_LEVEL_REDIRECTS,
2667 "Rewritten request line results in downgrade to http");
2669 * Replace the unencryptd headers received with the
2670 * CONNECT request with the ones we received securely.
2672 destroy_list(csp->headers);
2673 csp->headers->first = csp->https_headers->first;
2674 csp->headers->last = csp->https_headers->last;
2675 csp->https_headers->first = NULL;
2676 csp->https_headers->last = NULL;
2684 /*********************************************************************
2686 * Function : process_encrypted_request_headers
2688 * Description : Receives and parses the encrypted headers send
2689 * by the client when https-inspecting.
2692 * 1 : csp = Current client state (buffers, headers, etc...)
2694 * Returns : JB_ERR_OK on success,
2695 * JB_ERR_PARSE or JB_ERR_MEMORY otherwise
2697 *********************************************************************/
2698 static jb_err process_encrypted_request_headers(struct client_state *csp)
2703 /* Temporary copy of the client's headers before they get enlisted in csp->https_headers */
2704 struct list header_list;
2705 struct list *headers = &header_list;
2707 assert(csp->ssl_with_client_is_opened);
2709 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2710 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
2712 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2715 err = receive_encrypted_request_headers(csp);
2716 if (err != JB_ERR_OK)
2718 if (csp->client_iob->cur == NULL ||
2719 csp->client_iob->cur == csp->client_iob->eod)
2722 * We did not receive any data, most likely because the
2723 * client is done. Don't log this as a parse failure.
2725 return JB_ERR_PARSE;
2727 /* XXX: Also used for JB_ERR_MEMORY */
2728 log_error(LOG_LEVEL_ERROR, "Failed to receive encrypted request: %s",
2729 jb_err_to_string(err));
2730 ssl_send_data_delayed(&(csp->ssl_client_attr),
2731 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2735 /* We don't need get_request_line() because the whole HTTP head is buffered. */
2736 request_line = get_header(csp->client_iob);
2737 if (request_line == NULL)
2739 log_error(LOG_LEVEL_ERROR, "Failed to get the encrypted request line");
2740 ssl_send_data_delayed(&(csp->ssl_client_attr),
2741 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2742 return JB_ERR_PARSE;
2744 assert(*request_line != '\0');
2746 if (client_protocol_is_unsupported(csp, request_line))
2749 * If the protocol is unsupported we're done here.
2750 * client_protocol_is_unsupported() took care of sending
2751 * the error response and logging the error message.
2753 return JB_ERR_PARSE;
2756 #ifdef FEATURE_FORCE_LOAD
2757 if (force_required(csp, request_line))
2759 csp->flags |= CSP_FLAG_FORCED;
2761 #endif /* def FEATURE_FORCE_LOAD */
2763 free_http_request(csp->http);
2765 err = parse_http_request(request_line, csp->http);
2766 /* XXX: Restore ssl setting. This is ugly */
2767 csp->http->client_ssl = 1;
2768 csp->http->server_ssl = 1;
2770 freez(request_line);
2771 if (JB_ERR_OK != err)
2773 ssl_send_data_delayed(&(csp->ssl_client_attr),
2774 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2775 /* XXX: Use correct size */
2776 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2777 log_error(LOG_LEVEL_ERROR,
2778 "Couldn't parse request line received from %s: %s",
2779 csp->ip_addr_str, jb_err_to_string(err));
2781 free_http_request(csp->http);
2782 return JB_ERR_PARSE;
2785 /* Parse the rest of the client's headers. */
2789 p = get_header(csp->client_iob);
2793 /* There are no additional headers to read. */
2800 if (JB_ERR_OK != get_destination_from_https_headers(headers, csp->http))
2803 * Our attempts to get the request destination
2806 log_error(LOG_LEVEL_ERROR,
2807 "Failed to get the encrypted request destination");
2808 ssl_send_data_delayed(&(csp->ssl_client_attr),
2809 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2810 destroy_list(headers);
2812 return JB_ERR_PARSE;
2815 /* Split the domain we just got for pattern matching */
2816 init_domain_components(csp->http);
2818 #ifdef FEATURE_CLIENT_TAGS
2819 /* XXX: If the headers were enlisted sooner, passing csp would do. */
2820 if (csp->client_address == NULL)
2822 set_client_address(csp, headers);
2823 get_tag_list_for_client(csp->client_tags, csp->client_address);
2827 #ifdef FEATURE_TOGGLE
2828 if ((csp->flags & CSP_FLAG_TOGGLED_ON) != 0)
2832 * Determine the actions for this request after
2833 * clearing the ones from the previous one.
2835 free_current_action(csp->action);
2836 get_url_actions(csp, csp->http);
2839 enlist(csp->https_headers, csp->http->cmd);
2841 /* Append the previously read headers */
2842 err = list_append_list_unique(csp->https_headers, headers);
2843 destroy_list(headers);
2844 if (JB_ERR_OK != err)
2846 /* XXX: Send error message */
2850 /* XXX: Work around crash */
2851 csp->error_message = NULL;
2853 /* XXX: Why do this here? */
2856 err = sed_https(csp);
2857 if (JB_ERR_OK != err)
2859 ssl_send_data_delayed(&(csp->ssl_client_attr),
2860 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2861 log_error(LOG_LEVEL_ERROR, "Failed to parse client request from %s.",
2863 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
2864 csp->ip_addr_str, csp->http->cmd);
2865 return JB_ERR_PARSE;
2868 if ((NULL == csp->https_headers->first->str)
2869 || (strcmp(csp->http->cmd, csp->https_headers->first->str) &&
2870 (JB_ERR_OK != change_encrypted_request_destination(csp))))
2872 ssl_send_data_delayed(&(csp->ssl_client_attr),
2873 (const unsigned char *)MESSED_UP_REQUEST_RESPONSE,
2874 strlen(MESSED_UP_REQUEST_RESPONSE), get_write_delay(csp));
2875 log_error(LOG_LEVEL_ERROR,
2876 "Invalid request line after applying header filters.");
2877 /* XXX: Use correct size */
2878 log_error(LOG_LEVEL_CLF,
2879 "%s - - [%T] \"Invalid request generated\" 400 0", csp->ip_addr_str);
2881 return JB_ERR_PARSE;
2884 log_error(LOG_LEVEL_HEADER, "Encrypted request headers processed");
2885 log_error(LOG_LEVEL_REQUEST, "https://%s%s", csp->http->hostport,
2892 /*********************************************************************
2894 * Function : cgi_page_requested
2896 * Description : Checks if a request is for an internal CGI page.
2899 * 1 : host = The host requested by the client.
2901 * Returns : 1 if a CGI page has been requested, 0 otherwise
2903 *********************************************************************/
2904 static int cgi_page_requested(const char *host)
2906 if ((0 == strcmpic(host, CGI_SITE_1_HOST))
2907 || (0 == strcmpic(host, CGI_SITE_1_HOST "."))
2908 || (0 == strcmpic(host, CGI_SITE_2_HOST))
2909 || (0 == strcmpic(host, CGI_SITE_2_HOST ".")))
2919 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2920 /*********************************************************************
2922 * Function : continue_https_chat
2924 * Description : Behaves similar to chat() but only deals with
2925 * https-inspected requests that arrive on an already
2926 * established connection. The first request is always
2927 * served by chat() which is a lot more complex as it
2928 * has to deal with forwarding settings and connection
2931 * If a connection to the server has already been
2932 * opened it is reused unless the request is blocked
2933 * or the forwarder changed.
2935 * If a connection to the server has not yet been
2936 * opened (because the previous request was crunched),
2937 * or the forwarder changed, the connection is dropped
2938 * so that the client retries on a fresh one.
2941 * 1 : csp = Current client state (buffers, headers, etc...)
2943 * Returns : Nothing.
2945 *********************************************************************/
2946 static void continue_https_chat(struct client_state *csp)
2948 const struct forward_spec *fwd;
2950 if (JB_ERR_OK != process_encrypted_request_headers(csp))
2952 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2956 csp->requests_received_total++;
2959 * We have an encrypted request. Check if one of the crunchers wants it.
2961 if (crunch_response_triggered(csp, crunchers_all))
2964 * Yes. The client got the crunch response and we're done here.
2968 if (csp->ssl_with_server_is_opened == 0)
2970 log_error(LOG_LEVEL_CONNECT,
2971 "Dropping the client connection on socket %d. "
2972 "The server connection has not been established yet.",
2974 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2977 assert(csp->server_connection.sfd != JB_INVALID_SOCKET);
2979 fwd = forward_url(csp, csp->http);
2980 if (!connection_destination_matches(&csp->server_connection, csp->http, fwd))
2982 log_error(LOG_LEVEL_CONNECT,
2983 "Dropping the client connection on socket %d with "
2984 "server socket %d connected to %s. The forwarder has changed.",
2985 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
2986 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2990 log_applied_actions(csp->action);
2992 log_error(LOG_LEVEL_CONNECT,
2993 "Reusing server socket %d connected to %s. Requests already sent: %u.",
2994 csp->server_connection.sfd, csp->server_connection.host,
2995 csp->server_connection.requests_sent_total);
2997 if (send_https_request(csp))
3000 * Most likely the server connection timed out. We can't easily
3001 * create a new one so simply drop the client connection without a
3002 * error response to let the client retry.
3004 log_error(LOG_LEVEL_CONNECT,
3005 "Dropping client connection on socket %d. "
3006 "Forwarding the encrypted client request failed.",
3010 csp->server_connection.request_sent = time(NULL);
3011 csp->server_connection.requests_sent_total++;
3012 handle_established_connection(csp);
3013 freez(csp->receive_buffer);
3015 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3019 /*********************************************************************
3021 * Function : handle_established_connection
3023 * Description : Shuffle data between client and server once the
3024 * connection has been established and the request
3028 * 1 : csp = Current client state (buffers, headers, etc...)
3030 * Returns : Nothing.
3032 *********************************************************************/
3033 static void handle_established_connection(struct client_state *csp)
3039 struct pollfd poll_fds[2];
3043 struct timeval timeout;
3046 int ms_iis5_hack = 0;
3047 unsigned long long byte_count = 0;
3048 struct http_request *http;
3049 long len = 0; /* for buffer sizes (and negative error codes) */
3050 int buffer_and_filter_content = 0;
3051 unsigned int write_delay;
3052 #ifdef FEATURE_HTTPS_INSPECTION
3054 int use_ssl_tunnel = 0;
3055 csp->dont_verify_certificate = 0;
3057 if (csp->http->ssl && !(csp->action->flags & ACTION_HTTPS_INSPECTION))
3059 /* Pass encrypted content without filtering. */
3064 /* Skeleton for HTTP response, if we should intercept the request */
3065 struct http_response *rsp;
3066 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3067 int watch_client_socket;
3070 csp->receive_buffer_size = csp->config->receive_buffer_size;
3071 csp->receive_buffer = zalloc(csp->receive_buffer_size + 1);
3072 if (csp->receive_buffer == NULL)
3074 log_error(LOG_LEVEL_ERROR,
3075 "Out of memory. Failed to allocate the receive buffer.");
3076 rsp = cgi_error_memory();
3077 send_crunch_response(csp, rsp);
3084 maxfd = (csp->cfd > csp->server_connection.sfd) ?
3085 csp->cfd : csp->server_connection.sfd;
3088 /* pass data between the client and server
3089 * until one or the other shuts down the connection.
3094 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3095 watch_client_socket = 0 == (csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING);
3097 write_delay = get_write_delay(csp);
3101 #ifdef FEATURE_HTTPS_INSPECTION
3102 if (server_use_ssl(csp) && is_ssl_pending(&(csp->ssl_server_attr)))
3105 * It's possible that the TLS library already consumed all the
3106 * data the server intends to send. If that happens poll() and
3107 * select() will no longer see the data as available so we have
3108 * to skip the calls.
3110 goto server_wants_to_talk;
3112 if (watch_client_socket && client_use_ssl(csp) &&
3113 is_ssl_pending(&(csp->ssl_client_attr)))
3116 * The TLS libray may also consume all of the remaining data
3117 * from the client when we're shuffling the data from an
3118 * unbuffered request body to the server.
3120 goto client_wants_to_talk;
3125 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3126 if (!watch_client_socket)
3128 maxfd = csp->server_connection.sfd;
3131 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3133 FD_SET(csp->cfd, &rfds);
3136 FD_SET(csp->server_connection.sfd, &rfds);
3137 #endif /* ndef HAVE_POLL */
3139 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3140 if ((csp->flags & CSP_FLAG_CHUNKED)
3141 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3142 && ((csp->iob->eod - csp->iob->cur) >= 5)
3143 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
3146 * XXX: This check should be obsolete now,
3147 * but let's wait a while to be sure.
3149 log_error(LOG_LEVEL_CONNECT,
3150 "Looks like we got the last chunk together with "
3151 "the server headers but didn't detect it earlier. "
3152 "We better stop reading.");
3153 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
3154 csp->expected_content_length = byte_count;
3155 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
3157 if (server_body && server_response_is_complete(csp, byte_count))
3159 if (csp->expected_content_length == byte_count)
3161 log_error(LOG_LEVEL_CONNECT,
3162 "Done reading from server. Content length: %llu as expected. "
3163 "Bytes most recently read: %ld.",
3168 log_error(LOG_LEVEL_CONNECT,
3169 "Done reading from server. Expected content length: %llu. "
3170 "Actual content length: %llu. Bytes most recently read: %ld.",
3171 csp->expected_content_length, byte_count, len);
3175 * XXX: Should not jump around, handle_established_connection()
3176 * is complicated enough already.
3180 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
3183 poll_fds[0].fd = csp->cfd;
3184 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3185 if (!watch_client_socket)
3188 * Ignore incoming data, but still watch out
3189 * for disconnects etc. These flags are always
3190 * implied anyway but explicitly setting them
3193 poll_fds[0].events = POLLERR|POLLHUP;
3198 poll_fds[0].events = POLLIN;
3200 poll_fds[1].fd = csp->server_connection.sfd;
3201 poll_fds[1].events = POLLIN;
3202 n = poll(poll_fds, 2, csp->config->socket_timeout * 1000);
3204 timeout.tv_sec = csp->config->socket_timeout;
3205 timeout.tv_usec = 0;
3206 n = select((int)maxfd + 1, &rfds, NULL, NULL, &timeout);
3207 #endif /* def HAVE_POLL */
3209 /* Server or client not responding in timeout */
3212 log_error(LOG_LEVEL_CONNECT, "Socket timeout %d reached: %s",
3213 csp->config->socket_timeout, http->url);
3214 if ((byte_count == 0) && (http->ssl == 0))
3216 send_crunch_response(csp, error_response(csp, "connection-timeout"));
3218 mark_server_socket_tainted(csp);
3219 #ifdef FEATURE_HTTPS_INSPECTION
3220 close_client_and_server_ssl_connections(csp);
3227 log_error(LOG_LEVEL_ERROR, "poll() failed!: %E");
3229 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
3231 mark_server_socket_tainted(csp);
3232 #ifdef FEATURE_HTTPS_INSPECTION
3233 close_client_and_server_ssl_connections(csp);
3239 * This is the body of the browser's request,
3240 * just read and write it.
3242 * Receives data from browser and sends it to server
3244 * XXX: Make sure the client doesn't use pipelining
3245 * behind Privoxy's back.
3248 if ((poll_fds[0].revents & (POLLERR|POLLHUP|POLLNVAL)) != 0)
3250 log_error(LOG_LEVEL_CONNECT,
3251 "The client socket %d has become unusable while "
3252 "the server socket %d is still open.",
3253 csp->cfd, csp->server_connection.sfd);
3254 mark_server_socket_tainted(csp);
3258 if (poll_fds[0].revents != 0)
3260 if (FD_ISSET(csp->cfd, &rfds))
3261 #endif /* def HAVE_POLL*/
3263 int max_bytes_to_read;
3265 #ifdef FEATURE_HTTPS_INSPECTION
3266 client_wants_to_talk:
3269 max_bytes_to_read = (int)csp->receive_buffer_size;
3271 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3272 if ((csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
3274 if (data_is_available(csp->cfd, 0))
3277 * If the next request is already waiting, we have
3278 * to stop select()ing the client socket. Otherwise
3279 * we would always return right away and get nothing
3282 watch_client_socket = 0;
3283 log_error(LOG_LEVEL_CONNECT,
3284 "Stop watching client socket %d. "
3285 "There's already another request waiting.",
3290 * If the client socket is set, but there's no data
3291 * available on the socket, the client went fishing
3292 * and continuing talking to the server makes no sense.
3294 log_error(LOG_LEVEL_CONNECT,
3295 "The client closed socket %d while "
3296 "the server socket %d is still open.",
3297 csp->cfd, csp->server_connection.sfd);
3298 mark_server_socket_tainted(csp);
3301 if (csp->expected_client_content_length != 0)
3303 if (csp->expected_client_content_length < csp->receive_buffer_size)
3305 max_bytes_to_read = (int)csp->expected_client_content_length;
3307 log_error(LOG_LEVEL_CONNECT,
3308 "Waiting for up to %d bytes from the client.",
3311 assert(max_bytes_to_read <= csp->receive_buffer_size);
3312 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3314 #ifdef FEATURE_HTTPS_INSPECTION
3315 if (client_use_ssl(csp))
3317 if (csp->http->status == 101)
3319 len = ssl_recv_data(&(csp->ssl_client_attr),
3320 (unsigned char *)csp->receive_buffer,
3321 (size_t)max_bytes_to_read);
3324 log_error(LOG_LEVEL_ERROR, "Failed to receive data "
3325 "on client socket %d for an upgraded connection",
3331 log_error(LOG_LEVEL_CONNECT, "Done receiving data "
3332 "on client socket %d for an upgraded connection",
3336 byte_count += (unsigned long long)len;
3337 len = ssl_send_data(&(csp->ssl_server_attr),
3338 (unsigned char *)csp->receive_buffer, (size_t)len);
3341 log_error(LOG_LEVEL_ERROR, "Failed to send data "
3342 "on server socket %d for an upgraded connection",
3343 csp->server_connection.sfd);
3348 log_error(LOG_LEVEL_CONNECT, "Breaking with TLS/SSL.");
3352 #endif /* def FEATURE_HTTPS_INSPECTION */
3354 len = read_socket(csp->cfd, csp->receive_buffer, max_bytes_to_read);
3358 /* XXX: not sure if this is necessary. */
3359 mark_server_socket_tainted(csp);
3360 break; /* "game over, man" */
3363 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3364 if (csp->expected_client_content_length != 0)
3366 assert(len <= max_bytes_to_read);
3367 csp->expected_client_content_length -= (unsigned)len;
3368 log_error(LOG_LEVEL_CONNECT,
3369 "Expected client content length set to %llu "
3370 "after reading %ld bytes.",
3371 csp->expected_client_content_length, len);
3372 if (csp->expected_client_content_length == 0)
3374 log_error(LOG_LEVEL_CONNECT,
3375 "Done reading from the client.");
3376 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
3379 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3381 if (write_socket(csp->server_connection.sfd, csp->receive_buffer, (size_t)len))
3383 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
3384 mark_server_socket_tainted(csp);
3392 * The server wants to talk. It could be the header or the body.
3393 * If `hdr' is null, then it's the header otherwise it's the body.
3394 * FIXME: Does `hdr' really mean `host'? No.
3397 if (poll_fds[1].revents != 0)
3399 if (FD_ISSET(csp->server_connection.sfd, &rfds))
3400 #endif /* HAVE_POLL */
3402 #ifdef FEATURE_HTTPS_INSPECTION
3403 server_wants_to_talk:
3405 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3407 * If we are buffering content, we don't want to eat up to
3408 * buffer-limit bytes if the client no longer cares about them.
3409 * If we aren't buffering, however, a dead client socket will be
3410 * noticed pretty much right away anyway, so we can reduce the
3411 * overhead by skipping the check.
3413 if (buffer_and_filter_content && !socket_is_still_alive(csp->cfd))
3416 log_error(LOG_LEVEL_CONNECT,
3417 "The server still wants to talk, but the client may already have hung up on us.");
3419 log_error(LOG_LEVEL_CONNECT,
3420 "The server still wants to talk, but the client hung up on us.");
3421 mark_server_socket_tainted(csp);
3422 #ifdef FEATURE_HTTPS_INSPECTION
3423 close_client_and_server_ssl_connections(csp);
3426 #endif /* def _WIN32 */
3428 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3430 #ifdef FEATURE_HTTPS_INSPECTION
3432 * Reading data from standard or secured connection (HTTP/HTTPS)
3434 if (server_use_ssl(csp))
3436 len = ssl_recv_data(&(csp->ssl_server_attr),
3437 (unsigned char *)csp->receive_buffer, csp->receive_buffer_size);
3442 len = read_socket(csp->server_connection.sfd, csp->receive_buffer,
3443 (int)csp->receive_buffer_size);
3448 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
3450 if ((http->ssl && (csp->fwd == NULL))
3451 #ifdef FEATURE_HTTPS_INSPECTION
3457 * Just hang up. We already confirmed the client's CONNECT
3458 * request with status code 200 and unencrypted content is
3459 * no longer welcome.
3461 log_error(LOG_LEVEL_ERROR,
3462 "CONNECT already confirmed. Unable to tell the client about the problem.");
3465 else if (byte_count)
3468 * Just hang up. We already transmitted the original headers
3469 * and parts of the original content and therefore missed the
3470 * chance to send an error message (without risking data corruption).
3472 * XXX: we could retry with a fancy range request here.
3474 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
3475 "Unable to tell the client about the problem.");
3476 mark_server_socket_tainted(csp);
3477 #ifdef FEATURE_HTTPS_INSPECTION
3478 close_client_and_server_ssl_connections(csp);
3483 * XXX: Consider handling the cases above the same.
3485 mark_server_socket_tainted(csp);
3489 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3490 if (csp->flags & CSP_FLAG_CHUNKED)
3492 if ((len >= 5) && !memcmp(csp->receive_buffer+len-5, "0\r\n\r\n", 5))
3494 /* XXX: this is a temporary hack */
3495 log_error(LOG_LEVEL_CONNECT,
3496 "Looks like we reached the end of the last chunk. "
3497 "We better stop reading.");
3498 csp->expected_content_length = byte_count + (unsigned long long)len;
3499 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
3503 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
3506 * This is guaranteed by allocating with zalloc_or_die()
3507 * and never (intentionally) writing to the last byte.
3509 * csp->receive_buffer_size is the size of the part of the
3510 * buffer we intentionally write to, but we actually
3511 * allocated csp->receive_buffer_size+1 bytes so the assertion
3512 * stays within the allocated range.
3514 assert(csp->receive_buffer[csp->receive_buffer_size] == '\0');
3517 * Add a trailing zero to let be able to use string operations.
3518 * XXX: do we still need this with filter_popups gone?
3520 assert(len <= csp->receive_buffer_size);
3521 csp->receive_buffer[len] = '\0';
3524 * Normally, this would indicate that we've read
3525 * as much as the server has sent us and we can
3526 * close the client connection. However, Microsoft
3527 * in its wisdom has released IIS/5 with a bug that
3528 * prevents it from sending the trailing \r\n in
3529 * a 302 redirect header (and possibly other headers).
3530 * To work around this if we've haven't parsed
3531 * a full header we'll append a trailing \r\n
3532 * and see if this now generates a valid one.
3534 * This hack shouldn't have any impacts. If we've
3535 * already transmitted the header or if this is a
3536 * SSL connection, then we won't bother with this
3537 * hack. So we only work on partially received
3538 * headers. If we append a \r\n and this still
3539 * doesn't generate a valid header, then we won't
3540 * transmit anything to the client.
3545 if (server_body || (http->ssl
3546 #ifdef FEATURE_HTTPS_INSPECTION
3552 * If we have been buffering up the document,
3553 * now is the time to apply content modification
3554 * and send the result to the client.
3556 if (buffer_and_filter_content)
3558 p = execute_content_filters(csp);
3560 * If content filtering fails, use the original
3561 * buffer and length.
3562 * (see p != NULL ? p : csp->iob->cur below)
3566 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
3568 #ifdef FEATURE_COMPRESSION
3569 else if ((csp->flags & CSP_FLAG_CLIENT_SUPPORTS_DEFLATE)
3570 && (csp->content_length > LOWER_LENGTH_LIMIT_FOR_COMPRESSION))
3572 char *compressed_content = compress_buffer(p,
3573 (size_t *)&csp->content_length, csp->config->compression_level);
3574 if (compressed_content != NULL)
3577 p = compressed_content;
3578 csp->flags |= CSP_FLAG_BUFFERED_CONTENT_DEFLATED;
3583 if (JB_ERR_OK != update_server_headers(csp))
3585 log_error(LOG_LEVEL_FATAL,
3586 "Failed to update server headers. after filtering.");
3589 hdr = list_to_text(csp->headers);
3592 /* FIXME Should handle error properly */
3593 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3596 #ifdef FEATURE_HTTPS_INSPECTION
3598 * Sending data with standard or secured connection (HTTP/HTTPS)
3600 if (client_use_ssl(csp))
3602 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
3603 (const unsigned char *)hdr, strlen(hdr),
3604 get_write_delay(csp)) < 0)
3605 || (ssl_send_data_delayed(&(csp->ssl_client_attr),
3606 (const unsigned char *) ((p != NULL) ? p : csp->iob->cur),
3607 csp->content_length, get_write_delay(csp)) < 0))
3609 log_error(LOG_LEVEL_ERROR,
3610 "Failed to send the modified content to the client over TLS");
3613 mark_server_socket_tainted(csp);
3614 close_client_and_server_ssl_connections(csp);
3619 #endif /* def FEATURE_HTTPS_INSPECTION */
3621 if (write_socket_delayed(csp->cfd, hdr, strlen(hdr), write_delay)
3622 || write_socket_delayed(csp->cfd, ((p != NULL) ? p : csp->iob->cur),
3623 (size_t)csp->content_length, write_delay))
3625 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
3628 mark_server_socket_tainted(csp);
3637 break; /* "game over, man" */
3641 * This is not the body, so let's pretend the server just sent
3644 snprintf(csp->receive_buffer, csp->receive_buffer_size, "\r\n");
3645 len = (int)strlen(csp->receive_buffer);
3648 * Now, let the normal header parsing algorithm below do its
3649 * job. If it fails, we'll exit instead of continuing.
3656 * If we're in the body of the server document, just write it to
3657 * the client, unless we need to buffer the body for later
3658 * content-filtering.
3660 if (server_body || (http->ssl
3661 #ifdef FEATURE_HTTPS_INSPECTION
3666 if (buffer_and_filter_content)
3669 * If there is no memory left for buffering the content, or the buffer limit
3670 * has been reached, switch to non-filtering mode, i.e. make & write the
3671 * header, flush the iob and buf, and get out of the way.
3673 if (add_to_iob(csp->iob, csp->config->buffer_limit, csp->receive_buffer, len))
3678 log_error(LOG_LEVEL_INFO,
3679 "Flushing header and buffers. Stepping back from filtering.");
3681 hdr = list_to_text(csp->headers);
3685 * Memory is too tight to even generate the header.
3686 * Send our static "Out-of-memory" page.
3688 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
3689 rsp = cgi_error_memory();
3690 send_crunch_response(csp, rsp);
3691 mark_server_socket_tainted(csp);
3692 #ifdef FEATURE_HTTPS_INSPECTION
3693 close_client_and_server_ssl_connections(csp);
3697 hdrlen = strlen(hdr);
3699 #ifdef FEATURE_HTTPS_INSPECTION
3701 * Sending data with standard or secured connection (HTTP/HTTPS)
3703 if (client_use_ssl(csp))
3705 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
3706 (const unsigned char *)hdr, hdrlen, get_write_delay(csp)) < 0)
3707 || ((flushed = ssl_flush_socket(&(csp->ssl_client_attr),
3709 || (ssl_send_data_delayed(&(csp->ssl_client_attr),
3710 (const unsigned char *)csp->receive_buffer, (size_t)len,
3711 get_write_delay(csp)) < 0))
3713 log_error(LOG_LEVEL_CONNECT,
3714 "Flush header and buffers to client failed");
3716 mark_server_socket_tainted(csp);
3717 close_client_and_server_ssl_connections(csp);
3722 #endif /* def FEATURE_HTTPS_INSPECTION */
3724 if (write_socket_delayed(csp->cfd, hdr, hdrlen, write_delay)
3725 || ((flushed = flush_iob(csp->cfd, csp->iob, write_delay)) < 0)
3726 || write_socket_delayed(csp->cfd, csp->receive_buffer, (size_t)len,
3729 log_error(LOG_LEVEL_CONNECT,
3730 "Flush header and buffers to client failed: %E");
3732 mark_server_socket_tainted(csp);
3738 * Reset the byte_count to the amount of bytes
3739 * we just flushed. len will be added a few lines below,
3740 * hdrlen doesn't matter for LOG_LEVEL_CLF.
3742 byte_count = (unsigned long long)flushed;
3744 buffer_and_filter_content = 0;
3750 #ifdef FEATURE_HTTPS_INSPECTION
3752 * Sending data with standard or secured connection (HTTP/HTTPS)
3754 if (client_use_ssl(csp))
3756 ret = ssl_send_data_delayed(&(csp->ssl_client_attr),
3757 (const unsigned char *)csp->receive_buffer, (size_t)len,
3758 get_write_delay(csp));
3761 log_error(LOG_LEVEL_ERROR,
3762 "Sending data to client failed");
3763 mark_server_socket_tainted(csp);
3764 close_client_and_server_ssl_connections(csp);
3769 #endif /* def FEATURE_HTTPS_INSPECTION */
3771 if (write_socket_delayed(csp->cfd, csp->receive_buffer,
3772 (size_t)len, write_delay))
3774 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
3775 mark_server_socket_tainted(csp);
3780 byte_count += (unsigned long long)len;
3786 * We're still looking for the end of the server's header.
3787 * Buffer up the data we just read. If that fails, there's
3788 * little we can do but send our static out-of-memory page.
3790 if (add_to_iob(csp->iob, csp->config->buffer_limit, csp->receive_buffer, len))
3792 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
3793 rsp = cgi_error_memory();
3794 send_crunch_response(csp, rsp);
3795 mark_server_socket_tainted(csp);
3796 #ifdef FEATURE_HTTPS_INSPECTION
3797 close_client_and_server_ssl_connections(csp);
3802 /* Convert iob into something sed() can digest */
3803 if (JB_ERR_PARSE == get_server_headers(csp))
3808 * Well, we tried our MS IIS/5 hack and it didn't work.
3809 * The header is incomplete and there isn't anything
3810 * we can do about it.
3812 log_error(LOG_LEVEL_ERROR, "Invalid server headers. "
3813 "Applying the MS IIS5 hack didn't help.");
3814 log_error(LOG_LEVEL_CLF,
3815 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3816 #ifdef FEATURE_HTTPS_INSPECTION
3818 * Sending data with standard or secured connection (HTTP/HTTPS)
3820 if (client_use_ssl(csp))
3822 ssl_send_data_delayed(&(csp->ssl_client_attr),
3823 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3824 strlen(INVALID_SERVER_HEADERS_RESPONSE), get_write_delay(csp));
3827 #endif /* def FEATURE_HTTPS_INSPECTION */
3829 write_socket_delayed(csp->cfd,
3830 INVALID_SERVER_HEADERS_RESPONSE,
3831 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
3833 mark_server_socket_tainted(csp);
3834 #ifdef FEATURE_HTTPS_INSPECTION
3835 close_client_and_server_ssl_connections(csp);
3842 * Since we have to wait for more from the server before
3843 * we can parse the headers we just continue here.
3845 log_error(LOG_LEVEL_CONNECT,
3846 "Continuing buffering server headers from socket %d. "
3847 "Bytes most recently read: %ld.", csp->cfd, len);
3854 * Account for the content bytes we
3855 * might have gotten with the headers.
3857 assert(csp->iob->eod >= csp->iob->cur);
3858 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
3861 /* Did we actually get anything? */
3862 if (NULL == csp->headers->first)
3864 if ((csp->flags & CSP_FLAG_REUSED_CLIENT_CONNECTION))
3866 log_error(LOG_LEVEL_ERROR,
3867 "No server or forwarder response received on socket %d. "
3868 "Closing client socket %d without sending data.",
3869 csp->server_connection.sfd, csp->cfd);
3870 log_error(LOG_LEVEL_CLF,
3871 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3875 log_error(LOG_LEVEL_ERROR,
3876 "No server or forwarder response received on socket %d.",
3877 csp->server_connection.sfd);
3878 send_crunch_response(csp, error_response(csp, "no-server-data"));
3880 free_http_request(http);
3881 mark_server_socket_tainted(csp);
3882 #ifdef FEATURE_HTTPS_INSPECTION
3883 close_client_and_server_ssl_connections(csp);
3888 if (!csp->headers->first->str)
3890 log_error(LOG_LEVEL_ERROR, "header search: csp->headers->first->str == NULL, assert will be called");
3892 assert(csp->headers->first->str);
3894 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3895 strncmpic(csp->headers->first->str, "ICY", 3))
3898 * It doesn't look like a HTTP (or Shoutcast) response:
3899 * tell the client and log the problem.
3901 if (strlen(csp->headers->first->str) > 30)
3903 csp->headers->first->str[30] = '\0';
3905 log_error(LOG_LEVEL_ERROR,
3906 "Invalid server or forwarder response. Starts with: %s",
3907 csp->headers->first->str);
3908 log_error(LOG_LEVEL_CLF,
3909 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3910 #ifdef FEATURE_HTTPS_INSPECTION
3912 * Sending data with standard or secured connection (HTTP/HTTPS)
3914 if (client_use_ssl(csp))
3916 ssl_send_data_delayed(&(csp->ssl_client_attr),
3917 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3918 strlen(INVALID_SERVER_HEADERS_RESPONSE),
3919 get_write_delay(csp));
3922 #endif /* def FEATURE_HTTPS_INSPECTION */
3924 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3925 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
3927 free_http_request(http);
3928 mark_server_socket_tainted(csp);
3929 #ifdef FEATURE_HTTPS_INSPECTION
3930 close_client_and_server_ssl_connections(csp);
3936 * Disable redirect checkers, so that they will be only run
3937 * again if the user also enables them through tags.
3939 * From a performance point of view it doesn't matter,
3940 * but it prevents duplicated log messages.
3942 #ifdef FEATURE_FAST_REDIRECTS
3943 csp->action->flags &= ~ACTION_FAST_REDIRECTS;
3945 csp->action->flags &= ~ACTION_REDIRECT;
3948 * We have now received the entire server header,
3949 * filter it and send the result to the client
3951 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3953 log_error(LOG_LEVEL_CLF,
3954 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3955 #ifdef FEATURE_HTTPS_INSPECTION
3957 * Sending data with standard or secured connection (HTTP/HTTPS)
3959 if (client_use_ssl(csp))
3961 ssl_send_data_delayed(&(csp->ssl_client_attr),
3962 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3963 strlen(INVALID_SERVER_HEADERS_RESPONSE),
3964 get_write_delay(csp));
3969 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3970 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
3972 free_http_request(http);
3973 mark_server_socket_tainted(csp);
3974 #ifdef FEATURE_HTTPS_INSPECTION
3975 close_client_and_server_ssl_connections(csp);
3979 hdr = list_to_text(csp->headers);
3982 /* FIXME Should handle error properly */
3983 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3986 if ((csp->flags & CSP_FLAG_CHUNKED)
3987 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3988 && ((csp->iob->eod - csp->iob->cur) >= 5)
3989 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
3991 log_error(LOG_LEVEL_CONNECT,
3992 "Looks like we got the last chunk together with "
3993 "the server headers. We better stop reading.");
3994 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
3995 csp->expected_content_length = byte_count;
3996 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
3999 csp->server_connection.response_received = time(NULL);
4001 if (crunch_response_triggered(csp, crunchers_light))
4004 * One of the tags created by a server-header
4005 * tagger triggered a crunch. We already
4006 * delivered the crunch response to the client
4007 * and are done here after cleaning up.
4010 mark_server_socket_tainted(csp);
4011 #ifdef FEATURE_HTTPS_INSPECTION
4012 close_client_and_server_ssl_connections(csp);
4017 /* Buffer and pcrs filter this if appropriate. */
4018 buffer_and_filter_content = content_requires_filtering(csp);
4020 if (!buffer_and_filter_content)
4023 * Write the server's (modified) header to
4024 * the client (along with anything else that
4025 * may be in the buffer). Use standard or secured
4028 #ifdef FEATURE_HTTPS_INSPECTION
4029 if (client_use_ssl(csp))
4031 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
4032 (const unsigned char *)hdr, strlen(hdr),
4033 get_write_delay(csp)) < 0)
4034 || ((len = ssl_flush_socket(&(csp->ssl_client_attr),
4037 log_error(LOG_LEVEL_CONNECT, "Write header to client failed");
4040 * The write failed, so don't bother mentioning it
4041 * to the client... it probably can't hear us anyway.
4044 mark_server_socket_tainted(csp);
4045 #ifdef FEATURE_HTTPS_INSPECTION
4046 close_client_and_server_ssl_connections(csp);
4052 #endif /* def FEATURE_HTTPS_INSPECTION */
4054 if (write_socket_delayed(csp->cfd, hdr, strlen(hdr), write_delay)
4055 || ((len = flush_iob(csp->cfd, csp->iob, write_delay)) < 0))
4057 log_error(LOG_LEVEL_ERROR,
4058 "write header to client failed");
4060 * The write failed, so don't bother mentioning it
4061 * to the client... it probably can't hear us anyway.
4064 mark_server_socket_tainted(csp);
4070 /* we're finished with the server's header */
4076 * If this was a MS IIS/5 hack then it means the server
4077 * has already closed the connection. Nothing more to read.
4082 log_error(LOG_LEVEL_ERROR,
4083 "Closed server connection detected. "
4084 "Applying the MS IIS5 hack didn't help.");
4085 log_error(LOG_LEVEL_CLF,
4086 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
4087 #ifdef FEATURE_HTTPS_INSPECTION
4089 * Sending data with standard or secured connection (HTTP/HTTPS)
4091 if (client_use_ssl(csp))
4093 ssl_send_data_delayed(&(csp->ssl_client_attr),
4094 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
4095 strlen(INVALID_SERVER_HEADERS_RESPONSE),
4096 get_write_delay(csp));
4099 #endif /* def FEATURE_HTTPS_INSPECTION */
4101 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
4102 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
4104 mark_server_socket_tainted(csp);
4105 #ifdef FEATURE_HTTPS_INSPECTION
4106 close_client_and_server_ssl_connections(csp);
4113 mark_server_socket_tainted(csp);
4114 #ifdef FEATURE_HTTPS_INSPECTION
4115 close_client_and_server_ssl_connections(csp);
4117 return; /* huh? we should never get here */
4120 if (csp->content_length == 0)
4123 * If Privoxy didn't recalculate the Content-Length,
4124 * byte_count is still correct.
4126 csp->content_length = byte_count;
4129 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4130 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
4131 && (csp->expected_content_length != byte_count))
4133 log_error(LOG_LEVEL_CONNECT,
4134 "Received %llu bytes while expecting %llu.",
4135 byte_count, csp->expected_content_length);
4136 mark_server_socket_tainted(csp);
4140 #ifdef FEATURE_HTTPS_INSPECTION
4141 if (client_use_ssl(csp))
4143 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s https://%s%s %s\" 200 %llu",
4144 csp->ip_addr_str, http->gpc, http->hostport, http->path,
4145 http->version, csp->content_length);
4150 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
4151 csp->ip_addr_str, http->ocmd, csp->content_length);
4153 csp->server_connection.timestamp = time(NULL);
4157 /*********************************************************************
4161 * Description : Once a connection from the client has been accepted,
4162 * this function is called (via serve()) to handle the
4163 * main business of the communication. This function
4164 * returns after dealing with a single request. It can
4165 * be called multiple times with the same client socket
4166 * if the client is keeping the connection alive.
4168 * The decision whether or not a client connection will
4169 * be kept alive is up to the caller which also must
4170 * close the client socket when done.
4172 * FIXME: chat is nearly thousand lines long.
4176 * 1 : csp = Current client state (buffers, headers, etc...)
4178 * Returns : Nothing.
4180 *********************************************************************/
4181 static void chat(struct client_state *csp)
4183 const struct forward_spec *fwd;
4184 struct http_request *http;
4185 /* Skeleton for HTTP response, if we should intercept the request */
4186 struct http_response *rsp;
4187 #ifdef FEATURE_HTTPS_INSPECTION
4188 int use_ssl_tunnel = 0;
4193 if (receive_client_request(csp) != JB_ERR_OK)
4197 if (parse_client_request(csp) != JB_ERR_OK)
4202 #ifdef FEATURE_HTTPS_INSPECTION
4204 * Setting flags to use old solution with SSL tunnel and to disable
4205 * certificate verification.
4207 if (csp->http->ssl && !(csp->action->flags & ACTION_HTTPS_INSPECTION)
4208 && !cgi_page_requested(csp->http->host))
4213 if (http->ssl && (csp->action->flags & ACTION_IGNORE_CERTIFICATE_ERRORS))
4215 csp->dont_verify_certificate = 1;
4220 * build the http request to send to the server
4221 * we have to do one of the following:
4223 * create = use the original HTTP request to create a new
4224 * HTTP request that has either the path component
4225 * without the http://domainspec (w/path) or the
4226 * full orininal URL (w/url)
4227 * Note that the path and/or the HTTP version may
4228 * have been altered by now.
4230 * SSL proxy = Open a socket to the host:port of the server
4231 * and create TLS/SSL connection with server and
4232 * with client. Then behave like mediator between
4233 * client and server over TLS/SSL.
4235 * SSL proxy = Pass the request unchanged if forwarding a CONNECT
4236 * with request to a parent proxy. Note that we'll be sending
4237 * forwarding the CFAIL message ourselves if connecting to the parent
4238 * fails, but we won't send a CSUCCEED message if it works,
4239 * since that would result in a double message (ours and the
4240 * parent's). After sending the request to the parent, we
4241 * must parse answer and send it to client. If connection
4242 * with server is established, we do TLS/SSL proxy. Otherwise
4243 * we send parent response to client and close connections.
4245 * here's the matrix:
4248 * +--------+--------+
4250 * 0 | create | SSL |
4251 * | w/path | proxy |
4252 * Forwarding +--------+--------+
4254 * 1 | create | proxy |
4255 * | w/url |+forward|
4256 * +--------+--------+
4260 #ifdef FEATURE_HTTPS_INSPECTION
4262 * Presetting SSL client and server flags
4264 if (http->ssl && !use_ssl_tunnel)
4266 http->client_ssl = 1;
4267 http->server_ssl = 1;
4271 http->client_ssl = 0;
4272 http->server_ssl = 0;
4276 #ifdef FEATURE_HTTPS_INSPECTION
4278 * Log the request unless we're https inspecting
4279 * in which case we don't have the path yet and
4280 * will log the request later.
4282 if (!client_use_ssl(csp))
4285 log_error(LOG_LEVEL_REQUEST, "%s%s", http->hostport, http->path);
4288 if (http->ssl && connect_port_is_forbidden(csp))
4290 const char *acceptable_connect_ports =
4291 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
4292 assert(NULL != acceptable_connect_ports);
4293 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
4294 "limit-connect{%s} doesn't allow CONNECT requests to %s",
4295 csp->ip_addr_str, acceptable_connect_ports, csp->http->hostport);
4296 csp->action->flags |= ACTION_BLOCK;
4298 #ifdef FEATURE_HTTPS_INSPECTION
4299 http->client_ssl = 0;
4300 http->server_ssl = 0;
4305 * We have a request. Check if one of the crunchers wants it
4306 * unless the client wants to use TLS/SSL in which case we
4307 * haven't setup the TLS context yet and will send the crunch
4311 #ifdef FEATURE_HTTPS_INSPECTION
4312 !client_use_ssl(csp) &&
4314 crunch_response_triggered(csp, crunchers_all))
4317 * Yes. The client got the crunch response and we're done here.
4322 #ifdef FEATURE_HTTPS_INSPECTION
4323 if (client_use_ssl(csp) && !use_ssl_tunnel)
4327 * Creating a SSL proxy.
4329 * By sending the CSUCCEED message we're lying to the client as
4330 * the connection hasn't actually been established yet. We don't
4331 * establish the connection until we have seen and parsed the
4332 * encrypted client headers.
4334 if (write_socket_delayed(csp->cfd, CSUCCEED,
4335 strlen(CSUCCEED), get_write_delay(csp)) != 0)
4337 log_error(LOG_LEVEL_ERROR, "Sending SUCCEED to client failed");
4341 ret = create_client_ssl_connection(csp);
4344 log_error(LOG_LEVEL_ERROR,
4345 "Failed to open a secure connection with the client");
4348 if (JB_ERR_OK != process_encrypted_request_headers(csp))
4350 close_client_ssl_connection(csp);
4354 * We have an encrypted request. Check if one of the crunchers now
4355 * wants it (for example because the previously invisible path was
4356 * required to match).
4358 if (crunch_response_triggered(csp, crunchers_all))
4361 * Yes. The client got the crunch response and we're done here.
4368 log_applied_actions(csp->action);
4370 /* decide how to route the HTTP request */
4371 fwd = forward_url(csp, http);
4373 freez(csp->headers->first->str);
4374 build_request_line(csp, fwd, &csp->headers->first->str);
4376 if (fwd->forward_host)
4378 log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
4379 fwd->forward_host, fwd->forward_port, http->hostport);
4383 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
4386 /* here we connect to the server, gateway, or the forwarder */
4388 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4389 if ((csp->server_connection.sfd != JB_INVALID_SOCKET)
4390 && socket_is_still_alive(csp->server_connection.sfd)
4391 && connection_destination_matches(&csp->server_connection, http, fwd))
4393 log_error(LOG_LEVEL_CONNECT,
4394 "Reusing server socket %d connected to %s. Total requests: %u.",
4395 csp->server_connection.sfd, csp->server_connection.host,
4396 csp->server_connection.requests_sent_total);
4400 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
4402 #ifdef FEATURE_CONNECTION_SHARING
4403 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING
4404 #ifdef FEATURE_HTTPS_INSPECTION
4405 && !server_use_ssl(csp)
4409 remember_connection(&csp->server_connection);
4412 #endif /* def FEATURE_CONNECTION_SHARING */
4414 log_error(LOG_LEVEL_CONNECT,
4415 "Closing server socket %d connected to %s. Total requests: %u.",
4416 csp->server_connection.sfd, csp->server_connection.host,
4417 csp->server_connection.requests_sent_total);
4418 close_socket(csp->server_connection.sfd);
4420 mark_connection_closed(&csp->server_connection);
4422 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4425 * Connecting to destination server
4427 csp->server_connection.sfd = forwarded_connect(fwd, http, csp);
4429 if (csp->server_connection.sfd == JB_INVALID_SOCKET)
4431 if (fwd->type != SOCKS_NONE)
4434 rsp = error_response(csp, "forwarding-failed");
4436 else if (errno == EINVAL)
4438 rsp = error_response(csp, "no-such-domain");
4442 rsp = error_response(csp, "connect-failed");
4445 /* Write the answer to the client */
4448 send_crunch_response(csp, rsp);
4452 * Temporary workaround to prevent already-read client
4453 * bodies from being parsed as new requests. For now we
4454 * err on the safe side and throw all the following
4455 * requests under the bus, even if no client body has been
4456 * buffered. A compliant client will repeat the dropped
4457 * requests on an untainted connection.
4459 * The proper fix is to discard the no longer needed
4460 * client body in the buffer (if there is one) and to
4461 * continue parsing the bytes that follow.
4463 #ifdef FEATURE_HTTPS_INSPECTION
4464 close_client_ssl_connection(csp);
4466 drain_and_close_socket(csp->cfd);
4467 csp->cfd = JB_INVALID_SOCKET;
4472 #ifdef FEATURE_HTTPS_INSPECTION
4474 * Creating TLS/SSL connections with destination server or parent
4475 * proxy. If forwarding is enabled, we must send client request to
4476 * parent proxy and receive, parse and resend parent proxy answer.
4478 if (http->ssl && !use_ssl_tunnel)
4480 if (fwd->forward_host != NULL)
4482 char server_response[BUFFER_SIZE];
4485 char *hdr = list_to_text(csp->headers);
4486 memset(server_response, 0, sizeof(server_response));
4490 log_error(LOG_LEVEL_FATAL,
4491 "Out of memory parsing client header");
4493 list_remove_all(csp->headers);
4496 * Sending client's CONNECT request to the parent proxy
4498 ret = write_socket(csp->server_connection.sfd, hdr, strlen(hdr));
4504 log_error(LOG_LEVEL_CONNECT,
4505 "Sending request headers to: %s failed", http->hostport);
4506 mark_server_socket_tainted(csp);
4507 close_client_ssl_connection(csp);
4511 /* Waiting for parent proxy server response */
4512 len = read_socket(csp->server_connection.sfd, server_response,
4513 sizeof(server_response)-1);
4517 log_error(LOG_LEVEL_ERROR, "No response from parent proxy "
4518 "server on socket %d.", csp->server_connection.sfd);
4520 rsp = error_response(csp, "no-server-data");
4523 send_crunch_response(csp, rsp);
4525 mark_server_socket_tainted(csp);
4526 close_client_ssl_connection(csp);
4531 * Test if the connection to the destination server was
4532 * established successfully by the parent proxy.
4534 if (!tunnel_established_successfully(server_response, (unsigned int)len))
4536 log_error(LOG_LEVEL_ERROR,
4537 "The forwarder %s failed to establish a connection with %s",
4538 fwd->forward_host, http->host);
4539 rsp = error_response(csp, "connect-failed");
4542 send_crunch_response(csp, rsp);
4544 mark_server_socket_tainted(csp);
4545 close_client_ssl_connection(csp);
4548 } /* -END- if (fwd->forward_host != NULL) */
4551 * We can now create the TLS/SSL connection with the destination server.
4553 int ret = create_server_ssl_connection(csp);
4556 if (csp->server_cert_verification_result != SSL_CERT_VALID &&
4557 csp->server_cert_verification_result != SSL_CERT_NOT_VERIFIED)
4560 * If the server certificate is invalid, we must inform
4561 * the client and then close connection to the client.
4563 ssl_send_certificate_error(csp);
4564 close_client_and_server_ssl_connections(csp);
4567 if (csp->server_cert_verification_result == SSL_CERT_NOT_VERIFIED
4568 || csp->server_cert_verification_result == SSL_CERT_VALID)
4571 * The TLS/SSL connection wasn't created but an invalid
4572 * certificate wasn't detected. Report it as connection
4575 rsp = error_response(csp, "connect-failed");
4578 send_crunch_response(csp, rsp);
4580 close_client_and_server_ssl_connections(csp);
4584 }/* -END- if (http->ssl) */
4585 #endif /* def FEATURE_HTTPS_INSPECTION */
4587 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4588 save_connection_destination(csp->server_connection.sfd,
4589 http, fwd, &csp->server_connection);
4590 csp->server_connection.keep_alive_timeout =
4591 (unsigned)csp->config->keep_alive_timeout;
4593 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4595 csp->server_connection.requests_sent_total++;
4597 if ((fwd->type == SOCKS_5T) && (NULL == csp->headers->first))
4599 /* Client headers have been sent optimistically */
4600 assert(csp->headers->last == NULL);
4602 else if (http->ssl == 0 || (fwd->forward_host
4603 #ifdef FEATURE_HTTPS_INSPECTION
4608 if (send_http_request(csp))
4610 rsp = error_response(csp, "connect-failed");
4613 send_crunch_response(csp, rsp);
4621 * Using old solution with SSL tunnel or new solution with SSL proxy
4623 list_remove_all(csp->headers);
4624 #ifdef FEATURE_HTTPS_INSPECTION
4629 * We're running an SSL tunnel and we're not forwarding,
4630 * so just ditch the client headers, send the "connect succeeded"
4631 * message to the client, flush the rest, and get out of the way.
4633 if (write_socket_delayed(csp->cfd, CSUCCEED,
4634 strlen(CSUCCEED), get_write_delay(csp)))
4639 #ifdef FEATURE_HTTPS_INSPECTION
4643 * If server certificate has been verified and is invalid,
4644 * we must inform the client and then close the connection
4645 * with client and server.
4647 if (csp->server_cert_verification_result != SSL_CERT_VALID &&
4648 csp->server_cert_verification_result != SSL_CERT_NOT_VERIFIED)
4650 ssl_send_certificate_error(csp);
4651 close_client_and_server_ssl_connections(csp);
4654 if (send_https_request(csp))
4656 rsp = error_response(csp, "connect-failed");
4659 send_crunch_response(csp, rsp);
4661 close_client_and_server_ssl_connections(csp);
4665 #endif /* def FEATURE_HTTPS_INSPECTION */
4666 clear_iob(csp->client_iob);
4667 }/* -END- else ... if (http->ssl == 1) */
4669 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
4671 /* XXX: should the time start earlier for optimistically sent data? */
4672 csp->server_connection.request_sent = time(NULL);
4674 handle_established_connection(csp);
4675 freez(csp->receive_buffer);
4680 /*********************************************************************
4682 * Function : fuzz_server_response
4684 * Description : Treat the input as a whole server response.
4687 * 1 : csp = Current client state (buffers, headers, etc...)
4688 * 2 : fuzz_input_file = File to read the input from.
4692 *********************************************************************/
4693 extern int fuzz_server_response(struct client_state *csp, char *fuzz_input_file)
4695 static struct forward_spec fwd; /* Zero'd due to being static */
4698 if (strcmp(fuzz_input_file, "-") == 0)
4700 /* XXX: Doesn't work yet. */
4701 csp->server_connection.sfd = 0;
4705 csp->server_connection.sfd = open(fuzz_input_file, O_RDONLY);
4706 if (csp->server_connection.sfd == -1)
4708 log_error(LOG_LEVEL_FATAL, "Failed to open %s: %E",
4713 csp->content_type |= CT_GIF;
4714 csp->action->flags |= ACTION_DEANIMATE;
4715 csp->action->string[ACTION_STRING_DEANIMATE] = "last";
4717 csp->http->path = strdup_or_die("/");
4718 csp->http->host = strdup_or_die("fuzz.example.org");
4719 csp->http->hostport = strdup_or_die("fuzz.example.org:80");
4720 /* Prevent client socket monitoring */
4721 csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
4722 csp->flags |= CSP_FLAG_CHUNKED;
4724 csp->config->feature_flags |= RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE;
4725 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
4727 csp->content_type |= CT_DECLARED|CT_GIF;
4729 csp->config->socket_timeout = 0;
4731 cgi_init_error_messages();
4733 handle_established_connection(csp);
4734 freez(csp->receive_buffer);
4741 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4742 /*********************************************************************
4744 * Function : prepare_csp_for_next_request
4746 * Description : Put the csp in a mostly vergin state.
4749 * 1 : csp = Current client state (buffers, headers, etc...)
4753 *********************************************************************/
4754 static void prepare_csp_for_next_request(struct client_state *csp)
4756 csp->content_type = 0;
4757 csp->content_length = 0;
4758 csp->expected_content_length = 0;
4759 csp->expected_client_content_length = 0;
4760 list_remove_all(csp->headers);
4761 clear_iob(csp->iob);
4762 freez(csp->error_message);
4763 free_http_request(csp->http);
4764 destroy_list(csp->headers);
4765 #ifdef FEATURE_HTTPS_INSPECTION
4766 destroy_list(csp->https_headers);
4768 destroy_list(csp->tags);
4769 #ifdef FEATURE_CLIENT_TAGS
4770 destroy_list(csp->client_tags);
4771 freez(csp->client_address);
4773 free_current_action(csp->action);
4774 if (NULL != csp->fwd)
4776 unload_forward_spec(csp->fwd);
4779 /* XXX: Store per-connection flags someplace else. */
4780 csp->flags = (CSP_FLAG_ACTIVE | CSP_FLAG_REUSED_CLIENT_CONNECTION);
4781 #ifdef FEATURE_TOGGLE
4782 if (global_toggle_state)
4783 #endif /* def FEATURE_TOGGLE */
4785 csp->flags |= CSP_FLAG_TOGGLED_ON;
4788 if (csp->client_iob->eod > csp->client_iob->cur)
4790 long bytes_to_shift = csp->client_iob->cur - csp->client_iob->buf;
4791 size_t data_length = (size_t)(csp->client_iob->eod - csp->client_iob->cur);
4793 assert(bytes_to_shift > 0);
4794 assert(data_length > 0);
4796 log_error(LOG_LEVEL_CONNECT, "Shifting %lu pipelined bytes by %ld bytes",
4797 data_length, bytes_to_shift);
4798 memmove(csp->client_iob->buf, csp->client_iob->cur, data_length);
4799 csp->client_iob->cur = csp->client_iob->buf;
4800 assert(csp->client_iob->eod == csp->client_iob->buf + bytes_to_shift + data_length);
4801 csp->client_iob->eod = csp->client_iob->buf + data_length;
4802 memset(csp->client_iob->eod, '\0', (size_t)bytes_to_shift);
4804 csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
4809 * We mainly care about resetting client_iob->cur so we don't
4810 * waste buffer space at the beginning and don't mess up the
4811 * request restoration done by cgi_show_request().
4813 * Freeing the buffer itself isn't technically necessary,
4814 * but makes debugging more convenient.
4816 clear_iob(csp->client_iob);
4819 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4822 /*********************************************************************
4826 * Description : This is little more than chat. We only "serve" to
4827 * to close (or remember) any socket that chat may have
4831 * 1 : csp = Current client state (buffers, headers, etc...)
4835 *********************************************************************/
4836 static void serve(struct client_state *csp)
4838 int config_file_change_detected = 0; /* Only used for debugging */
4839 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4840 #ifdef FEATURE_CONNECTION_SHARING
4841 static int monitor_thread_running = 0;
4842 #endif /* def FEATURE_CONNECTION_SHARING */
4843 int continue_chatting = 0;
4845 log_error(LOG_LEVEL_CONNECT, "Accepted connection from %s on socket %d",
4846 csp->ip_addr_str, csp->cfd);
4850 unsigned int latency;
4852 #ifdef FEATURE_HTTPS_INSPECTION
4853 if (continue_chatting && client_use_ssl(csp))
4855 continue_https_chat(csp);
4864 * If the request has been crunched,
4865 * the calculated latency is zero.
4867 latency = (unsigned)(csp->server_connection.response_received -
4868 csp->server_connection.request_sent) / 2;
4870 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
4871 && (csp->flags & CSP_FLAG_CRUNCHED)
4872 && (csp->expected_client_content_length != 0))
4874 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
4875 log_error(LOG_LEVEL_CONNECT,
4876 "Tainting client socket %d due to unread data.", csp->cfd);
4879 continue_chatting = (csp->config->feature_flags
4880 & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
4881 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
4882 && (csp->cfd != JB_INVALID_SOCKET)
4883 && (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
4884 && ((csp->flags & CSP_FLAG_SERVER_CONTENT_LENGTH_SET)
4885 || (csp->flags & CSP_FLAG_CHUNKED));
4887 if (!(csp->flags & CSP_FLAG_CRUNCHED)
4888 && (csp->server_connection.sfd != JB_INVALID_SOCKET))
4890 if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
4892 csp->server_connection.keep_alive_timeout = csp->config->default_server_timeout;
4894 if (!(csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
4895 || (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
4896 || !socket_is_still_alive(csp->server_connection.sfd)
4897 || !(latency < csp->server_connection.keep_alive_timeout))
4899 log_error(LOG_LEVEL_CONNECT,
4900 "Closing server socket %d connected to %s. "
4901 "Keep-alive: %u. Tainted: %u. Socket alive: %u. Timeout: %u.",
4902 csp->server_connection.sfd, (csp->server_connection.host != NULL) ?
4903 csp->server_connection.host : csp->http->host,
4904 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
4905 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
4906 socket_is_still_alive(csp->server_connection.sfd),
4907 csp->server_connection.keep_alive_timeout);
4908 #ifdef FEATURE_CONNECTION_SHARING
4909 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
4911 forget_connection(csp->server_connection.sfd);
4913 #endif /* def FEATURE_CONNECTION_SHARING */
4914 #ifdef FEATURE_HTTPS_INSPECTION
4915 close_server_ssl_connection(csp);
4917 close_socket(csp->server_connection.sfd);
4918 mark_connection_closed(&csp->server_connection);
4919 #ifdef FEATURE_HTTPS_INSPECTION
4920 if (continue_chatting && client_use_ssl(csp))
4923 * Close the client socket as well as Privoxy currently
4924 * can't establish a new server connection when the client
4925 * socket is reused and would drop the connection in
4926 * continue_https_chat() anyway.
4928 continue_chatting = 0;
4929 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
4930 log_error(LOG_LEVEL_CONNECT,
4931 "Client socket %d is no longer usable. "
4932 "The server socket has been closed.", csp->cfd);
4938 if (continue_chatting && any_loaded_file_changed(csp))
4940 continue_chatting = 0;
4941 config_file_change_detected = 1;
4943 #ifdef FEATURE_HTTPS_INSPECTION
4944 if (continue_chatting && client_use_ssl(csp) &&
4945 csp->ssl_with_client_is_opened == 0)
4947 continue_chatting = 0;
4948 log_error(LOG_LEVEL_CONNECT, "Client socket %d is no longer usable. "
4949 "The TLS session has been terminated.", csp->cfd);
4953 if (continue_chatting)
4955 if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) != 0)
4956 && socket_is_still_alive(csp->cfd))
4958 log_error(LOG_LEVEL_CONNECT, "Client request %d has been "
4959 "pipelined on socket %d and the socket is still alive.",
4960 csp->requests_received_total+1, csp->cfd);
4961 prepare_csp_for_next_request(csp);
4965 if (0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE))
4967 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
4969 log_error(LOG_LEVEL_CONNECT,
4970 "Waiting for the next client request on socket %d. "
4971 "Keeping the server socket %d to %s open.",
4972 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
4976 log_error(LOG_LEVEL_CONNECT,
4977 "Waiting for the next client request on socket %d. "
4978 "No server socket to keep open.", csp->cfd);
4982 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
4983 && data_is_available(csp->cfd, (int)csp->config->keep_alive_timeout)
4984 && socket_is_still_alive(csp->cfd))
4986 log_error(LOG_LEVEL_CONNECT,
4987 "Data arrived in time on client socket %d. Requests so far: %u",
4988 csp->cfd, csp->requests_received_total);
4989 prepare_csp_for_next_request(csp);
4993 #ifdef FEATURE_CONNECTION_SHARING
4994 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
4995 && (csp->server_connection.sfd != JB_INVALID_SOCKET)
4996 && (socket_is_still_alive(csp->server_connection.sfd))
4997 #ifdef FEATURE_HTTPS_INSPECTION
4998 && !server_use_ssl(csp)
5002 time_t time_open = time(NULL) - csp->server_connection.timestamp;
5004 if (csp->server_connection.keep_alive_timeout < time_open - (time_t)latency)
5009 remember_connection(&csp->server_connection);
5010 csp->server_connection.sfd = JB_INVALID_SOCKET;
5011 drain_and_close_socket(csp->cfd);
5012 csp->cfd = JB_INVALID_SOCKET;
5013 privoxy_mutex_lock(&connection_reuse_mutex);
5014 if (!monitor_thread_running)
5016 monitor_thread_running = 1;
5017 privoxy_mutex_unlock(&connection_reuse_mutex);
5018 wait_for_alive_connections();
5019 privoxy_mutex_lock(&connection_reuse_mutex);
5020 monitor_thread_running = 0;
5022 privoxy_mutex_unlock(&connection_reuse_mutex);
5024 #endif /* def FEATURE_CONNECTION_SHARING */
5028 else if (csp->server_connection.sfd != JB_INVALID_SOCKET)
5030 log_error(LOG_LEVEL_CONNECT,
5031 "Closing server socket %d connected to %s. Keep-alive: %u. "
5032 "Tainted: %u. Socket alive: %u. Timeout: %u. "
5033 "Configuration file change detected: %u",
5034 csp->server_connection.sfd, csp->server_connection.host,
5035 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
5036 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
5037 socket_is_still_alive(csp->server_connection.sfd),
5038 csp->server_connection.keep_alive_timeout,
5039 config_file_change_detected);
5041 } while (continue_chatting);
5045 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
5047 if (csp->cfd != JB_INVALID_SOCKET)
5049 log_error(LOG_LEVEL_CONNECT, "Closing client socket %d. "
5050 "Keep-alive: %u. Socket alive: %u. Data available: %u. "
5051 "Configuration file change detected: %u. Requests received: %u.",
5052 csp->cfd, 0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE),
5053 socket_is_still_alive(csp->cfd), data_is_available(csp->cfd, 0),
5054 config_file_change_detected, csp->requests_received_total);
5055 #ifdef FEATURE_HTTPS_INSPECTION
5056 close_client_ssl_connection(csp);
5058 drain_and_close_socket(csp->cfd);
5061 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
5063 #ifdef FEATURE_CONNECTION_SHARING
5064 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
5066 forget_connection(csp->server_connection.sfd);
5068 #endif /* def FEATURE_CONNECTION_SHARING */
5070 #ifdef FEATURE_HTTPS_INSPECTION
5071 close_server_ssl_connection(csp);
5072 #endif /* def FEATURE_HTTPS_INSPECTION */
5074 close_socket(csp->server_connection.sfd);
5077 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
5078 mark_connection_closed(&csp->server_connection);
5081 free_csp_resources(csp);
5083 csp->flags &= ~CSP_FLAG_ACTIVE;
5089 /*********************************************************************
5091 * Function : server_thread
5093 * Description : We only exist to call `serve' in a threaded environment.
5096 * 1 : data = Current client state (buffers, headers, etc...)
5098 * Returns : Always 0.
5100 *********************************************************************/
5101 static int32 server_thread(void *data)
5103 serve((struct client_state *) data);
5110 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
5111 /*********************************************************************
5115 * Description : Print usage info & exit.
5117 * Parameters : Pointer to argv[0] for identifying ourselves
5121 *********************************************************************/
5122 static void usage(const char *name)
5124 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
5125 "Usage: %s [--config-test] "
5128 #endif /* defined(unix) */
5131 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
5132 #endif /* defined(unix) */
5133 "[--version] [configfile]\n",
5137 show_fuzz_usage(name);
5140 printf("Aborting\n");
5145 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
5148 #ifdef MUTEX_LOCKS_AVAILABLE
5149 /*********************************************************************
5151 * Function : privoxy_mutex_lock
5153 * Description : Locks a mutex.
5156 * 1 : mutex = The mutex to lock.
5158 * Returns : Void. May exit in case of errors.
5160 *********************************************************************/
5161 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
5163 #ifdef FEATURE_PTHREAD
5164 int err = pthread_mutex_lock(mutex);
5167 if (mutex != &log_mutex)
5169 log_error(LOG_LEVEL_FATAL,
5170 "Mutex locking failed: %s.\n", strerror(err));
5175 EnterCriticalSection(mutex);
5176 #endif /* def FEATURE_PTHREAD */
5180 /*********************************************************************
5182 * Function : privoxy_mutex_unlock
5184 * Description : Unlocks a mutex.
5187 * 1 : mutex = The mutex to unlock.
5189 * Returns : Void. May exit in case of errors.
5191 *********************************************************************/
5192 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
5194 #ifdef FEATURE_PTHREAD
5195 int err = pthread_mutex_unlock(mutex);
5198 if (mutex != &log_mutex)
5200 log_error(LOG_LEVEL_FATAL,
5201 "Mutex unlocking failed: %s.\n", strerror(err));
5206 LeaveCriticalSection(mutex);
5207 #endif /* def FEATURE_PTHREAD */
5211 /*********************************************************************
5213 * Function : privoxy_mutex_init
5215 * Description : Prepares a mutex.
5218 * 1 : mutex = The mutex to initialize.
5220 * Returns : Void. May exit in case of errors.
5222 *********************************************************************/
5223 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
5225 #ifdef FEATURE_PTHREAD
5226 int err = pthread_mutex_init(mutex, 0);
5229 printf("Fatal error. Mutex initialization failed: %s.\n",
5234 InitializeCriticalSection(mutex);
5235 #endif /* def FEATURE_PTHREAD */
5237 #endif /* def MUTEX_LOCKS_AVAILABLE */
5239 /*********************************************************************
5241 * Function : initialize_mutexes
5243 * Description : Prepares mutexes if mutex support is available.
5247 * Returns : Void, exits in case of errors.
5249 *********************************************************************/
5250 static void initialize_mutexes(void)
5252 #ifdef MUTEX_LOCKS_AVAILABLE
5254 * Prepare global mutex semaphores
5257 #ifdef FEATURE_HTTPS_INSPECTION
5258 privoxy_mutex_init(&certificate_mutex);
5259 privoxy_mutex_init(&ssl_init_mutex);
5262 privoxy_mutex_init(&log_mutex);
5263 privoxy_mutex_init(&log_init_mutex);
5264 privoxy_mutex_init(&connection_reuse_mutex);
5265 #ifdef FEATURE_EXTERNAL_FILTERS
5266 privoxy_mutex_init(&external_filter_mutex);
5268 #ifdef FEATURE_CLIENT_TAGS
5269 privoxy_mutex_init(&client_tags_mutex);
5271 #ifdef FEATURE_EXTENDED_STATISTICS
5272 privoxy_mutex_init(&filter_statistics_mutex);
5273 privoxy_mutex_init(&block_statistics_mutex);
5277 * XXX: The assumptions below are a bit naive
5278 * and can cause locks that aren't necessary.
5280 * For example older FreeBSD versions (< 6.x?)
5281 * have no gethostbyname_r, but gethostbyname is
5284 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
5285 privoxy_mutex_init(&resolver_mutex);
5286 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
5288 * XXX: should we use a single mutex for
5289 * localtime() and gmtime() as well?
5291 #ifndef HAVE_GMTIME_R
5292 privoxy_mutex_init(&gmtime_mutex);
5293 #endif /* ndef HAVE_GMTIME_R */
5295 #ifndef HAVE_LOCALTIME_R
5296 privoxy_mutex_init(&localtime_mutex);
5297 #endif /* ndef HAVE_GMTIME_R */
5299 #if !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM)
5300 privoxy_mutex_init(&rand_mutex);
5301 #endif /* !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM) */
5303 #endif /* def MUTEX_LOCKS_AVAILABLE */
5306 /*********************************************************************
5310 * Description : Load the config file and start the listen loop.
5311 * This function is a lot more *sane* with the `load_config'
5312 * and `listen_loop' functions; although it stills does
5313 * a *little* too much for my taste.
5316 * 1 : argc = Number of parameters (including $0).
5317 * 2 : argv = Array of (char *)'s to the parameters.
5319 * Returns : 1 if : can't open config file, unrecognized directive,
5320 * stats requested in multi-thread mode, can't open the
5321 * log file, can't open the jar file, listen port is invalid,
5322 * any load fails, and can't bind port.
5324 * Else main never returns, the process must be signaled
5325 * to terminate execution. Or, on Windows, use the
5326 * "File", "Exit" menu option.
5328 *********************************************************************/
5330 int real_main(int argc, char **argv)
5332 int main(int argc, char **argv)
5336 int do_config_test = 0;
5337 #ifndef HAVE_ARC4RANDOM
5338 unsigned int random_seed;
5341 struct passwd *pw = NULL;
5342 struct group *grp = NULL;
5344 char *pre_chroot_nslookup_to_load_resolver = NULL;
5347 char *fuzz_input_type = NULL;
5348 char *fuzz_input_file = NULL;
5355 #if !defined(_WIN32)
5362 /* Prepare mutexes if supported and necessary. */
5363 initialize_mutexes();
5365 /* Enable logging until further notice. */
5369 * Parse the command line arguments
5371 * XXX: simply printing usage information in case of
5372 * invalid arguments isn't particularly user friendly.
5374 while (++argc_pos < argc)
5377 /* Check to see if the service must be installed or uninstalled */
5378 if (strncmp(argv[argc_pos], "--install", 9) == 0)
5380 const char *pName = argv[argc_pos] + 9;
5383 exit((install_service(pName)) ? 0 : 1);
5385 else if (strncmp(argv[argc_pos], "--uninstall", 11) == 0)
5387 const char *pName = argv[argc_pos] + 11;
5390 exit((uninstall_service(pName)) ? 0 : 1);
5392 else if (strcmp(argv[argc_pos], "--service") == 0)
5394 bRunAsService = TRUE;
5395 w32_set_service_cwd();
5396 atexit(w32_service_exit_notify);
5399 #endif /* defined(_WIN32) */
5402 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
5404 if (strcmp(argv[argc_pos], "--help") == 0)
5409 else if (strcmp(argv[argc_pos], "--version") == 0)
5411 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
5417 else if (strcmp(argv[argc_pos], "--no-daemon") == 0)
5419 set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
5423 else if (strcmp(argv[argc_pos], "--pidfile") == 0)
5425 if (++argc_pos == argc) usage(argv[0]);
5426 pidfile = strdup_or_die(argv[argc_pos]);
5429 else if (strcmp(argv[argc_pos], "--user") == 0)
5434 if (++argc_pos == argc) usage(argv[argc_pos]);
5436 user_arg = strdup_or_die(argv[argc_pos]);
5437 group_name = strchr(user_arg, '.');
5438 if (NULL != group_name)
5440 /* Nul-terminate the user name */
5443 /* Skip the former delimiter to actually reach the group name */
5446 grp = getgrnam(group_name);
5449 log_error(LOG_LEVEL_FATAL, "Group '%s' not found.", group_name);
5452 pw = getpwnam(user_arg);
5455 log_error(LOG_LEVEL_FATAL, "User '%s' not found.", user_arg);
5461 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup") == 0)
5463 if (++argc_pos == argc) usage(argv[0]);
5464 pre_chroot_nslookup_to_load_resolver = strdup_or_die(argv[argc_pos]);
5467 else if (strcmp(argv[argc_pos], "--chroot") == 0)
5471 #endif /* defined(unix) */
5473 else if (strcmp(argv[argc_pos], "--config-test") == 0)
5478 else if (strcmp(argv[argc_pos], "--fuzz") == 0)
5481 if (argc < argc_pos + 2) usage(argv[0]);
5482 fuzz_input_type = argv[argc_pos];
5484 fuzz_input_file = argv[argc_pos];
5486 else if (strcmp(argv[argc_pos], "--stfu") == 0)
5488 set_debug_level(LOG_LEVEL_STFU);
5491 else if (argc_pos + 1 != argc)
5494 * This is neither the last command line
5495 * option, nor was it recognized before,
5496 * therefore it must be invalid.
5502 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
5504 configfile = argv[argc_pos];
5507 } /* -END- while (more arguments) */
5509 show_version(Argv[0]);
5512 if (*configfile != '/')
5514 char cwd[BUFFER_SIZE];
5516 size_t abs_file_size;
5518 /* make config-filename absolute here */
5519 if (NULL == getcwd(cwd, sizeof(cwd)))
5521 perror("failed to get current working directory");
5525 basedir = strdup_or_die(cwd);
5527 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
5528 abs_file = malloc_or_die(abs_file_size);
5529 strlcpy(abs_file, basedir, abs_file_size);
5530 strlcat(abs_file, "/", abs_file_size);
5531 strlcat(abs_file, configfile, abs_file_size);
5532 configfile = abs_file;
5534 #endif /* defined unix */
5538 clients->next = NULL;
5540 /* XXX: factor out initialising after the next stable release. */
5545 #ifndef HAVE_ARC4RANDOM
5546 random_seed = (unsigned int)time(NULL);
5548 srandom(random_seed);
5551 #endif /* ifdef HAVE_RANDOM */
5552 #endif /* ifndef HAVE_ARC4RANDOM */
5555 * Unix signal handling
5557 * Catch the abort, interrupt and terminate signals for a graceful exit
5558 * Catch the hangup signal so the errlog can be reopened.
5560 * Ignore the broken pipe signal as connection failures
5561 * are handled when and where they occur without relying
5564 #if !defined(_WIN32)
5567 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP };
5569 for (idx = 0; idx < SZ(catched_signals); idx++)
5571 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
5572 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
5574 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
5575 #endif /* ifdef sun */
5577 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
5581 if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
5583 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for SIGPIPE: %E");
5587 #else /* ifdef _WIN32 */
5588 # ifdef _WIN_CONSOLE
5590 * We *are* in a windows console app.
5591 * Print a verbose messages about FAQ's and such
5593 printf("%s", win32_blurb);
5594 # endif /* def _WIN_CONSOLE */
5595 #endif /* def _WIN32 */
5598 if (fuzz_input_type != NULL)
5600 exit(process_fuzzed_input(fuzz_input_type, fuzz_input_file));
5602 log_error(LOG_LEVEL_FATAL,
5603 "When compiled with fuzzing support, Privoxy should only be used for fuzzing. "
5604 "Various data structures are static which is unsafe when using threads.");
5609 exit(NULL == load_config());
5612 /* Initialize the CGI subsystem */
5613 cgi_init_error_messages();
5616 * If running on unix and without the --no-daemon
5617 * option, become a daemon. I.e. fork, detach
5618 * from tty and get process group leadership
5627 if (pid < 0) /* error */
5632 else if (pid != 0) /* parent */
5637 * must check for errors
5638 * child died due to missing files aso
5641 wpid = waitpid(pid, &status, WNOHANG);
5653 * stderr (fd 2) will be closed later on,
5654 * when the config file has been parsed.
5660 * Reserve fd 0 and 1 to prevent abort() and friends
5661 * from sending stuff to the clients or servers.
5663 fd = open("/dev/null", O_RDONLY);
5666 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
5670 if (dup2(fd, 0) == -1)
5672 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 0: %E");
5676 fd = open("/dev/null", O_WRONLY);
5679 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
5683 if (dup2(fd, 1) == -1)
5685 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 1: %E");
5690 #ifdef FEATURE_EXTERNAL_FILTERS
5691 for (fd = 0; fd < 3; fd++)
5693 mark_socket_for_close_on_execute(fd);
5697 if (chdir("/") != 0)
5699 log_error(LOG_LEVEL_FATAL, "Failed to cd into '/': %E");
5702 } /* -END- if (daemon_mode) */
5705 * As soon as we have written the PID file, we can switch
5706 * to the user and group ID indicated by the --user option
5708 if (pidfile != NULL)
5710 write_pid_file(pidfile);
5714 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
5716 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
5720 if (setgroups(1, &grp->gr_gid))
5722 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
5725 else if (initgroups(pw->pw_name, pw->pw_gid))
5727 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
5733 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
5735 /* Read the time zone file from /etc before doing chroot. */
5737 if (NULL != pre_chroot_nslookup_to_load_resolver
5738 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
5740 /* Initialize resolver library. */
5741 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
5743 if (chroot(pw->pw_dir) < 0)
5745 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
5749 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
5752 if (setuid(pw->pw_uid))
5754 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
5758 char putenv_dummy[64];
5760 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
5761 if (putenv(putenv_dummy) != 0)
5763 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
5766 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
5767 if (putenv(putenv_dummy) != 0)
5769 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
5775 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
5778 #endif /* defined unix */
5781 /* This will be FALSE unless the command line specified --service
5785 /* Yup, so now we must attempt to establish a connection
5786 * with the service dispatcher. This will only work if this
5787 * process was launched by the service control manager to
5788 * actually run as a service. If this isn't the case, i've
5789 * known it take around 30 seconds or so for the call to return.
5792 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
5793 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
5795 /* Service has run, and at this point is now being stopped, so just return */
5800 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
5802 /* An error occurred. Usually it's because --service was wrongly specified
5803 * and we were unable to connect to the Service Control Dispatcher because
5804 * it wasn't expecting us and is therefore not listening.
5806 * For now, just continue below to call the listen_loop function.
5809 #endif /* def _WIN32 */
5819 /*********************************************************************
5821 * Function : bind_port_helper
5823 * Description : Bind the listen port. Handles logging, and aborts
5827 * 1 : haddr = Host address to bind to. Use NULL to bind to
5829 * 2 : hport = Specifies port to bind to.
5830 * 3 : backlog = Listen backlog.
5832 * Returns : Port that was opened.
5834 *********************************************************************/
5835 static jb_socket bind_port_helper(const char *haddr, int hport, int backlog)
5840 result = bind_port(haddr, hport, backlog, &bfd);
5844 const char *bind_address = (NULL != haddr) ? haddr : "INADDR_ANY";
5848 log_error(LOG_LEVEL_FATAL,
5849 "can't bind to %s:%d: There may be another Privoxy "
5850 "or some other proxy running on port %d",
5851 bind_address, hport, hport);
5855 log_error(LOG_LEVEL_FATAL,
5856 "can't bind to %s:%d: The hostname is not resolvable",
5857 bind_address, hport);
5861 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: %E",
5862 bind_address, hport);
5866 /* shouldn't get here */
5867 return JB_INVALID_SOCKET;
5872 if (bfd >= FD_SETSIZE)
5874 log_error(LOG_LEVEL_FATAL,
5875 "Bind socket number too high to use select(): %d >= %d",
5883 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
5888 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
5896 /*********************************************************************
5898 * Function : bind_ports_helper
5900 * Description : Bind the listen ports. Handles logging, and aborts
5904 * 1 : config = Privoxy configuration. Specifies ports
5906 * 2 : sockets = Preallocated array of opened sockets
5907 * corresponding to specification in config.
5908 * All non-opened sockets will be set to
5909 * JB_INVALID_SOCKET.
5911 * Returns : Nothing. Inspect sockets argument.
5913 *********************************************************************/
5914 static void bind_ports_helper(struct configuration_spec * config,
5915 jb_socket sockets[])
5919 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
5921 if (config->hport[i])
5923 sockets[i] = bind_port_helper(config->haddr[i],
5924 config->hport[i], config->listen_backlog);
5925 #if defined(FEATURE_ACCEPT_FILTER) && defined(SO_ACCEPTFILTER)
5926 if (config->enable_accept_filter && sockets[i] != JB_INVALID_SOCKET)
5928 struct accept_filter_arg af_options;
5929 bzero(&af_options, sizeof(af_options));
5930 strlcpy(af_options.af_name, "httpready", sizeof(af_options.af_name));
5931 if (setsockopt(sockets[i], SOL_SOCKET, SO_ACCEPTFILTER, &af_options,
5932 sizeof(af_options)))
5934 log_error(LOG_LEVEL_ERROR,
5935 "Enabling accept filter for socket %d failed: %E", sockets[i]);
5942 sockets[i] = JB_INVALID_SOCKET;
5945 config->need_bind = 0;
5949 /*********************************************************************
5951 * Function : close_ports_helper
5953 * Description : Close listenings ports.
5956 * 1 : sockets = Array of opened and non-opened sockets to
5957 * close. All sockets will be set to
5958 * JB_INVALID_SOCKET.
5960 * Returns : Nothing.
5962 *********************************************************************/
5963 static void close_ports_helper(jb_socket sockets[])
5967 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
5969 if (JB_INVALID_SOCKET != sockets[i])
5971 close_socket(sockets[i]);
5973 sockets[i] = JB_INVALID_SOCKET;
5979 /* Without this simple workaround we get this compiler warning from _beginthread
5980 * warning C4028: formal parameter 1 different from declaration
5982 void w32_service_listen_loop(void *p)
5986 #endif /* def _WIN32 */
5989 /*********************************************************************
5991 * Function : listen_loop
5993 * Description : bind the listen port and enter a "FOREVER" listening loop.
5999 *********************************************************************/
6000 static void listen_loop(void)
6002 struct client_states *csp_list = NULL;
6003 struct client_state *csp = NULL;
6004 jb_socket bfds[MAX_LISTENING_SOCKETS];
6005 struct configuration_spec *config;
6006 unsigned int active_threads = 0;
6007 #if defined(FEATURE_PTHREAD)
6008 pthread_attr_t attrs;
6010 pthread_attr_init(&attrs);
6011 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
6014 config = load_config();
6016 #ifdef FEATURE_CONNECTION_SHARING
6018 * XXX: Should be relocated once it no
6019 * longer needs to emit log messages.
6021 initialize_reusable_connections();
6022 #endif /* def FEATURE_CONNECTION_SHARING */
6024 bind_ports_helper(config, bfds);
6026 #ifdef FEATURE_GRACEFUL_TERMINATION
6027 while (!g_terminate)
6032 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__)
6033 while (waitpid(-1, NULL, WNOHANG) > 0)
6035 /* zombie children */
6037 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) */
6040 * Free data that was used by died threads
6042 active_threads = sweep();
6046 * Re-open the errlog after HUP signal
6048 if (received_hup_signal)
6050 if (NULL != config->logfile)
6052 init_error_log(Argv[0], config->logfile);
6054 received_hup_signal = 0;
6058 csp_list = zalloc_or_die(sizeof(*csp_list));
6059 csp = &csp_list->csp;
6061 log_error(LOG_LEVEL_CONNECT,
6062 "Waiting for the next client connection. Currently active threads: %u",
6066 * This config may be outdated, but for accept_connection()
6067 * it's fresh enough.
6069 csp->config = config;
6071 if (!accept_connection(csp, bfds))
6073 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
6078 csp->flags |= CSP_FLAG_ACTIVE;
6079 csp->server_connection.sfd = JB_INVALID_SOCKET;
6081 csp->config = config = load_config();
6083 if (config->need_bind)
6086 * Since we were listening to the "old port", we will not see
6087 * a "listen" param change until the next request. So, at
6088 * least 1 more request must be made for us to find the new
6089 * setting. I am simply closing the old socket and binding the
6092 * Which-ever is correct, we will serve 1 more page via the
6093 * old settings. This should probably be a "show-status"
6094 * request. This should not be a so common of an operation
6095 * that this will hurt people's feelings.
6098 close_ports_helper(bfds);
6100 bind_ports_helper(config, bfds);
6103 #ifdef FEATURE_TOGGLE
6104 if (global_toggle_state)
6105 #endif /* def FEATURE_TOGGLE */
6107 csp->flags |= CSP_FLAG_TOGGLED_ON;
6110 if (run_loader(csp))
6112 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
6113 /* Never get here - LOG_LEVEL_FATAL causes program exit */
6117 if (block_acl(NULL,csp))
6119 log_error(LOG_LEVEL_CONNECT,
6120 "Connection from %s on %s (socket %d) dropped due to ACL",
6121 csp->ip_addr_str, csp->listen_addr_str, csp->cfd);
6122 close_socket(csp->cfd);
6123 freez(csp->ip_addr_str);
6124 freez(csp->listen_addr_str);
6128 #endif /* def FEATURE_ACL */
6130 if ((0 != config->max_client_connections)
6131 && (active_threads >= config->max_client_connections))
6133 log_error(LOG_LEVEL_ERROR,
6134 "Rejecting connection from %s. Maximum number of connections reached.",
6136 write_socket_delayed(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
6137 strlen(TOO_MANY_CONNECTIONS_RESPONSE), get_write_delay(csp));
6138 close_socket(csp->cfd);
6139 freez(csp->ip_addr_str);
6140 freez(csp->listen_addr_str);
6145 /* add it to the list of clients */
6146 csp_list->next = clients->next;
6147 clients->next = csp_list;
6149 if (config->multi_threaded)
6153 /* this is a switch () statement in the C preprocessor - ugh */
6154 #undef SELECTED_ONE_OPTION
6156 /* Use Pthreads in preference to native code */
6157 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
6158 #define SELECTED_ONE_OPTION
6160 pthread_t the_thread;
6163 ret = pthread_create(&the_thread, &attrs,
6164 (void * (*)(void *))serve, csp);
6165 child_id = ret ? -1 : 0;
6169 #if defined(_WIN32) && !defined(SELECTED_ONE_OPTION)
6170 #define SELECTED_ONE_OPTION
6171 child_id = _beginthread(
6172 (void (*)(void *))serve,
6177 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
6178 #define SELECTED_ONE_OPTION
6180 thread_id tid = spawn_thread
6181 (server_thread, "server", B_NORMAL_PRIORITY, csp);
6183 if ((tid >= 0) && (resume_thread(tid) == B_OK))
6185 child_id = (int) tid;
6194 #if !defined(SELECTED_ONE_OPTION)
6197 /* This block is only needed when using fork().
6198 * When using threads, the server thread was
6199 * created and run by the call to _beginthread().
6201 if (child_id == 0) /* child */
6204 #ifdef FEATURE_TOGGLE
6205 int inherited_toggle_state = global_toggle_state;
6206 #endif /* def FEATURE_TOGGLE */
6211 * If we've been toggled or we've blocked the request, tell Mom
6214 #ifdef FEATURE_TOGGLE
6215 if (inherited_toggle_state != global_toggle_state)
6217 rc |= RC_FLAG_TOGGLED;
6219 #endif /* def FEATURE_TOGGLE */
6221 #ifdef FEATURE_STATISTICS
6222 if (csp->flags & CSP_FLAG_REJECTED)
6224 rc |= RC_FLAG_BLOCKED;
6226 #endif /* ndef FEATURE_STATISTICS */
6230 else if (child_id > 0) /* parent */
6232 /* in a fork()'d environment, the parent's
6233 * copy of the client socket and the CSP
6237 #if !defined(_WIN32) && !defined(__CYGWIN__)
6239 wait(&child_status);
6242 * Evaluate child's return code: If the child has
6243 * - been toggled, toggle ourselves
6244 * - blocked its request, bump up the stats counter
6247 #ifdef FEATURE_TOGGLE
6248 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
6250 global_toggle_state = !global_toggle_state;
6252 #endif /* def FEATURE_TOGGLE */
6254 #ifdef FEATURE_STATISTICS
6256 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
6260 #endif /* def FEATURE_STATISTICS */
6262 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
6263 close_socket(csp->cfd);
6264 csp->flags &= ~CSP_FLAG_ACTIVE;
6268 #undef SELECTED_ONE_OPTION
6269 /* end of cpp switch () */
6274 * Spawning the child failed, assume it's because
6275 * there are too many children running already.
6276 * XXX: If you assume ...
6278 log_error(LOG_LEVEL_ERROR,
6279 "Unable to take any additional connections: %E. Active threads: %u",
6281 write_socket_delayed(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
6282 strlen(TOO_MANY_CONNECTIONS_RESPONSE), get_write_delay(csp));
6283 close_socket(csp->cfd);
6284 csp->flags &= ~CSP_FLAG_ACTIVE;
6293 #if defined(FEATURE_PTHREAD)
6294 pthread_attr_destroy(&attrs);
6297 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
6299 #ifdef FEATURE_GRACEFUL_TERMINATION
6301 log_error(LOG_LEVEL_INFO, "Graceful termination requested.");
6303 close_ports_helper(bfds);
6305 unload_current_config_file();
6306 unload_current_actions_file();
6307 unload_current_re_filterfile();
6308 #ifdef FEATURE_TRUST
6309 unload_current_trust_file();
6312 if (config->multi_threaded)
6319 } while ((clients->next != NULL) && (--i > 0));
6323 log_error(LOG_LEVEL_ERROR, "Graceful termination failed "
6324 "- still some live clients after 1 minute wait.");
6334 #ifdef FEATURE_HTTPS_INSPECTION
6336 * Only release TLS backed resources if there
6337 * are no active connections left.
6339 if (clients->next == NULL)
6345 log_error(LOG_LEVEL_INFO, "Exiting gracefully.");
6347 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
6348 /* Cleanup - remove taskbar icon etc. */
6353 #endif /* FEATURE_GRACEFUL_TERMINATION */