1 /*********************************************************************
3 * File : $Source: /cvsroot/ijbswa/current/jcc.c,v $
5 * Purpose : Main file. Contains main() method, main loop, and
6 * the main connection-handling function.
8 * Copyright : Written by and Copyright (C) 2001-2021 the
9 * Privoxy team. https://www.privoxy.org/
11 * Based on the Internet Junkbuster originally written
12 * by and Copyright (C) 1997 Anonymous Coders and
13 * Junkbusters Corporation. http://www.junkbusters.com
15 * This program is free software; you can redistribute it
16 * and/or modify it under the terms of the GNU General
17 * Public License as published by the Free Software
18 * Foundation; either version 2 of the License, or (at
19 * your option) any later version.
21 * This program is distributed in the hope that it will
22 * be useful, but WITHOUT ANY WARRANTY; without even the
23 * implied warranty of MERCHANTABILITY or FITNESS FOR A
24 * PARTICULAR PURPOSE. See the GNU General Public
25 * License for more details.
27 * The GNU General Public License should be included with
28 * this file. If not, you can view it at
29 * http://www.gnu.org/copyleft/gpl.html
30 * or write to the Free Software Foundation, Inc., 59
31 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
33 *********************************************************************/
39 #include <sys/types.h>
48 # ifndef FEATURE_PTHREAD
52 # include <winsock2.h>
55 # endif /* ndef FEATURE_PTHREAD */
60 # endif /* ndef _WIN_CONSOLE */
61 # include "w32svrapi.h"
63 #else /* ifndef _WIN32 */
66 # include <sys/wait.h>
67 # include <sys/time.h>
68 # include <sys/stat.h>
69 # include <sys/ioctl.h>
72 #include <sys/termios.h>
83 # include <socket.h> /* BeOS has select() for sockets only. */
84 # include <OS.h> /* declarations for threads and stuff. */
92 #endif /* def __GLIBC__ */
97 #warning poll() appears to be unavailable. Your platform will become unsupported in the future.
98 #endif /* HAVE_POLL */
105 #ifdef FEATURE_HTTPS_INSPECTION
111 #include "miscutil.h"
113 #include "jbsockets.h"
118 #include "urlmatch.h"
119 #ifdef FEATURE_CLIENT_TAGS
120 #include "client-tags.h"
124 struct client_states clients[1];
125 struct file_list files[1];
127 #ifdef FEATURE_STATISTICS
128 int urls_read = 0; /* total nr of urls read inc rejected */
129 int urls_rejected = 0; /* total nr of urls rejected */
130 #endif /* def FEATURE_STATISTICS */
132 #ifdef FEATURE_GRACEFUL_TERMINATION
137 static void sig_handler(int the_signal);
139 static int client_protocol_is_unsupported(struct client_state *csp, char *req);
140 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
141 static jb_err get_server_headers(struct client_state *csp);
142 static const char *crunch_reason(const struct http_response *rsp);
143 static void send_crunch_response(struct client_state *csp, struct http_response *rsp);
144 static char *get_request_line(struct client_state *csp);
145 static jb_err receive_client_request(struct client_state *csp);
146 static jb_err parse_client_request(struct client_state *csp);
147 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
148 static jb_err change_request_destination(struct client_state *csp);
149 static void handle_established_connection(struct client_state *csp);
150 static void chat(struct client_state *csp);
151 static void serve(struct client_state *csp);
152 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
153 static void usage(const char *myname);
155 static void initialize_mutexes(void);
156 static jb_socket bind_port_helper(const char *haddr, int hport, int backlog);
157 static void bind_ports_helper(struct configuration_spec *config, jb_socket sockets[]);
158 static void close_ports_helper(jb_socket sockets[]);
159 static void listen_loop(void);
160 static void serve(struct client_state *csp);
163 static int32 server_thread(void *data);
164 #endif /* def __BEOS__ */
167 #define sleep(N) Sleep(((N) * 1000))
171 int process_fuzzed_input(char *fuzz_input_type, char *fuzz_input_file);
172 void show_fuzz_usage(const char *name);
175 #ifdef MUTEX_LOCKS_AVAILABLE
177 * XXX: Does the locking stuff really belong in this file?
179 privoxy_mutex_t log_mutex;
180 privoxy_mutex_t log_init_mutex;
181 privoxy_mutex_t connection_reuse_mutex;
183 #ifdef FEATURE_HTTPS_INSPECTION
184 privoxy_mutex_t certificate_mutex;
185 privoxy_mutex_t ssl_init_mutex;
188 #ifdef FEATURE_EXTERNAL_FILTERS
189 privoxy_mutex_t external_filter_mutex;
191 #ifdef FEATURE_CLIENT_TAGS
192 privoxy_mutex_t client_tags_mutex;
194 #ifdef FEATURE_EXTENDED_STATISTICS
195 privoxy_mutex_t filter_statistics_mutex;
196 privoxy_mutex_t block_statistics_mutex;
199 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
200 privoxy_mutex_t resolver_mutex;
201 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
203 #ifndef HAVE_GMTIME_R
204 privoxy_mutex_t gmtime_mutex;
205 #endif /* ndef HAVE_GMTIME_R */
207 #ifndef HAVE_LOCALTIME_R
208 privoxy_mutex_t localtime_mutex;
209 #endif /* ndef HAVE_GMTIME_R */
211 #if !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM)
212 privoxy_mutex_t rand_mutex;
213 #endif /* !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM) */
215 #endif /* def MUTEX_LOCKS_AVAILABLE */
218 const char *basedir = NULL;
219 const char *pidfile = NULL;
220 static int received_hup_signal = 0;
221 #endif /* defined unix */
223 /* HTTP snipplets. */
224 static const char CSUCCEED[] =
225 "HTTP/1.1 200 Connection established\r\n\r\n";
227 static const char CHEADER[] =
228 "HTTP/1.1 400 Invalid header received from client\r\n"
229 "Content-Type: text/plain\r\n"
230 "Connection: close\r\n\r\n"
231 "Invalid header received from client.\n";
233 static const char FTP_RESPONSE[] =
234 "HTTP/1.1 400 Invalid request received from client\r\n"
235 "Content-Type: text/plain\r\n"
236 "Connection: close\r\n\r\n"
237 "Invalid request. Privoxy doesn't support FTP.\n";
239 static const char GOPHER_RESPONSE[] =
240 "HTTP/1.1 400 Invalid request received from client\r\n"
241 "Content-Type: text/plain\r\n"
242 "Connection: close\r\n\r\n"
243 "Invalid request. Privoxy doesn't support gopher.\n";
245 /* XXX: should be a template */
246 static const char MISSING_DESTINATION_RESPONSE[] =
247 "HTTP/1.1 400 Bad request received from client\r\n"
248 "Content-Type: text/plain\r\n"
249 "Connection: close\r\n\r\n"
250 "Bad request. Privoxy was unable to extract the destination.\n";
252 /* XXX: should be a template */
253 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
254 "HTTP/1.1 502 Server or forwarder response invalid\r\n"
255 "Content-Type: text/plain\r\n"
256 "Connection: close\r\n\r\n"
257 "Bad response. The server or forwarder response doesn't look like HTTP.\n";
259 /* XXX: should be a template */
260 static const char MESSED_UP_REQUEST_RESPONSE[] =
261 "HTTP/1.1 400 Malformed request after rewriting\r\n"
262 "Content-Type: text/plain\r\n"
263 "Connection: close\r\n\r\n"
264 "Bad request. Messed up with header filters.\n";
266 static const char TOO_MANY_CONNECTIONS_RESPONSE[] =
267 "HTTP/1.1 503 Too many open connections\r\n"
268 "Content-Type: text/plain\r\n"
269 "Connection: close\r\n\r\n"
270 "Maximum number of open connections reached.\n";
272 static const char CLIENT_CONNECTION_TIMEOUT_RESPONSE[] =
273 "HTTP/1.1 504 Connection timeout\r\n"
274 "Content-Type: text/plain\r\n"
275 "Connection: close\r\n\r\n"
276 "The connection timed out because the client request didn't arrive in time.\n";
278 static const char CLIENT_BODY_PARSE_ERROR_RESPONSE[] =
279 "HTTP/1.1 400 Failed reading client body\r\n"
280 "Content-Type: text/plain\r\n"
281 "Connection: close\r\n\r\n"
282 "Failed parsing or buffering the chunk-encoded client body.\n";
284 static const char UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE[] =
285 "HTTP/1.1 417 Expecting too much\r\n"
286 "Content-Type: text/plain\r\n"
287 "Connection: close\r\n\r\n"
288 "Privoxy detected an unsupported Expect header value.\n";
290 /* A function to crunch a response */
291 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
293 /* Crunch function flags */
294 #define CF_NO_FLAGS 0
295 /* Cruncher applies to forced requests as well */
296 #define CF_IGNORE_FORCE 1
297 /* Crunched requests are counted for the block statistics */
298 #define CF_COUNT_AS_REJECT 2
300 /* A crunch function and its flags */
303 const crunch_func_ptr cruncher;
307 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
309 /* Complete list of cruncher functions */
310 static const struct cruncher crunchers_all[] = {
311 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
312 { block_url, CF_COUNT_AS_REJECT },
314 { trust_url, CF_COUNT_AS_REJECT },
315 #endif /* def FEATURE_TRUST */
316 { redirect_url, CF_NO_FLAGS },
317 { dispatch_cgi, CF_IGNORE_FORCE},
321 /* Light version, used after tags are applied */
322 static const struct cruncher crunchers_light[] = {
323 { block_url, CF_COUNT_AS_REJECT },
324 { redirect_url, CF_NO_FLAGS },
330 * XXX: Don't we really mean
337 /*********************************************************************
339 * Function : sig_handler
341 * Description : Signal handler for different signals.
342 * Exit gracefully on TERM and INT
343 * or set a flag that will cause the errlog
344 * to be reopened by the main thread on HUP.
347 * 1 : the_signal = the signal cause this function to call
351 *********************************************************************/
352 static void sig_handler(int the_signal)
358 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
370 received_hup_signal = 1;
376 * We shouldn't be here, unless we catch signals
377 * in main() that we can't handle here!
379 log_error(LOG_LEVEL_FATAL,
380 "sig_handler: exiting on unexpected signal %d", the_signal);
388 /*********************************************************************
390 * Function : get_write_delay
392 * Description : Parse the delay-response parameter.
395 * 1 : csp = Current client state (buffers, headers, etc...)
397 * Returns : Number of milliseconds to delay writes.
399 *********************************************************************/
400 static unsigned int get_write_delay(const struct client_state *csp)
406 if ((csp->action->flags & ACTION_DELAY_RESPONSE) == 0)
410 newval = csp->action->string[ACTION_STRING_DELAY_RESPONSE];
412 delay = (unsigned)strtol(newval, &endptr, 0);
415 log_error(LOG_LEVEL_FATAL,
416 "Invalid delay-response{} parameter: '%s'", newval);
424 /*********************************************************************
426 * Function : client_protocol_is_unsupported
428 * Description : Checks if the client used a known unsupported
429 * protocol and deals with it by sending an error
433 * 1 : csp = Current client state (buffers, headers, etc...)
434 * 2 : req = the first request line send by the client
436 * Returns : TRUE if an error response has been generated, or
437 * FALSE if the request doesn't look invalid.
439 *********************************************************************/
440 static int client_protocol_is_unsupported(struct client_state *csp, char *req)
443 * If it's a FTP or gopher request, we don't support it.
445 * These checks are better than nothing, but they might
446 * not work in all configurations and some clients might
447 * have problems digesting the answer.
449 * They should, however, never cause more problems than
450 * Privoxy's old behaviour (returning the misleading HTML
453 * "Could not resolve http://(ftp|gopher)://example.org").
455 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
457 const char *response = NULL;
458 const char *protocol = NULL;
460 if (!strncmpic(req, "GET ftp://", 10))
462 response = FTP_RESPONSE;
467 response = GOPHER_RESPONSE;
470 log_error(LOG_LEVEL_ERROR,
471 "%s tried to use Privoxy as %s proxy: %s",
472 csp->ip_addr_str, protocol, req);
473 log_error(LOG_LEVEL_CLF,
474 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
477 #ifdef FEATURE_HTTPS_INSPECTION
478 if (client_use_ssl(csp))
480 ssl_send_data_delayed(&(csp->ssl_client_attr),
481 (const unsigned char *)response, strlen(response),
482 get_write_delay(csp));
487 write_socket_delayed(csp->cfd, response, strlen(response),
488 get_write_delay(csp));
498 /*********************************************************************
500 * Function : client_has_unsupported_expectations
502 * Description : Checks if the client used an unsupported expectation
503 * in which case an error message is delivered.
506 * 1 : csp = Current client state (buffers, headers, etc...)
508 * Returns : TRUE if an error response has been generated, or
509 * FALSE if the request doesn't look invalid.
511 *********************************************************************/
512 static int client_has_unsupported_expectations(const struct client_state *csp)
514 if ((csp->flags & CSP_FLAG_UNSUPPORTED_CLIENT_EXPECTATION))
516 log_error(LOG_LEVEL_ERROR,
517 "Rejecting request from client %s with unsupported Expect header value",
519 log_error(LOG_LEVEL_CLF,
520 "%s - - [%T] \"%s\" 417 0", csp->ip_addr_str, csp->http->cmd);
521 write_socket_delayed(csp->cfd,
522 UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE,
523 strlen(UNSUPPORTED_CLIENT_EXPECTATION_ERROR_RESPONSE),
524 get_write_delay(csp));
534 /*********************************************************************
536 * Function : get_request_destination_elsewhere
538 * Description : If the client's request was redirected into
539 * Privoxy without the client's knowledge,
540 * the request line lacks the destination host.
542 * This function tries to get it elsewhere,
543 * provided accept-intercepted-requests is enabled.
545 * "Elsewhere" currently only means "Host: header",
546 * but in the future we may ask the redirecting
547 * packet filter to look the destination up.
549 * If the destination stays unknown, an error
550 * response is send to the client and headers
551 * are freed so that chat() can return directly.
554 * 1 : csp = Current client state (buffers, headers, etc...)
555 * 2 : headers = a header list
557 * Returns : JB_ERR_OK if the destination is now known, or
558 * JB_ERR_PARSE if it isn't.
560 *********************************************************************/
561 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
563 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
565 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
566 " Privoxy isn't configured to accept intercepted requests.",
567 csp->ip_addr_str, csp->http->cmd);
568 /* XXX: Use correct size */
569 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
570 csp->ip_addr_str, csp->http->cmd);
572 write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER),
573 get_write_delay(csp));
574 destroy_list(headers);
578 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
580 /* Split the domain we just got for pattern matching */
581 init_domain_components(csp->http);
587 /* We can't work without destination. Go spread the news.*/
589 /* XXX: Use correct size */
590 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
591 csp->ip_addr_str, csp->http->cmd);
592 log_error(LOG_LEVEL_ERROR,
593 "Privoxy was unable to get the destination for %s's request: %s",
594 csp->ip_addr_str, csp->http->cmd);
596 write_socket_delayed(csp->cfd, MISSING_DESTINATION_RESPONSE,
597 strlen(MISSING_DESTINATION_RESPONSE), get_write_delay(csp));
598 destroy_list(headers);
603 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
604 * to get the destination IP address, use it as host directly
605 * or do a reverse DNS lookup first.
610 /*********************************************************************
612 * Function : get_server_headers
614 * Description : Parses server headers in iob and fills them
615 * into csp->headers so that they can later be
619 * 1 : csp = Current client state (buffers, headers, etc...)
621 * Returns : JB_ERR_OK if everything went fine, or
622 * JB_ERR_PARSE if the headers were incomplete.
624 *********************************************************************/
625 static jb_err get_server_headers(struct client_state *csp)
627 int continue_hack_in_da_house = 0;
630 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
635 * continue hack in da house. Ignore the ending of
636 * this head and continue enlisting header lines.
637 * The reason is described below.
639 enlist(csp->headers, "");
640 continue_hack_in_da_house = 0;
643 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
646 * It's a bodyless continue response, don't
647 * stop header parsing after reaching its end.
649 * As a result Privoxy will concatenate the
650 * next response's head and parse and deliver
651 * the headers as if they belonged to one request.
653 * The client will separate them because of the
654 * empty line between them.
656 * XXX: What we're doing here is clearly against
657 * the intended purpose of the continue header,
658 * and under some conditions (HTTP/1.0 client request)
659 * it's a standard violation.
661 * Anyway, "sort of against the spec" is preferable
662 * to "always getting confused by Continue responses"
663 * (Privoxy's behaviour before this hack was added)
665 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
666 continue_hack_in_da_house = 1;
668 else if (*header == '\0')
671 * If the header is empty, but the Continue hack
672 * isn't active, we can assume that we reached the
673 * end of the buffer before we hit the end of the
676 * Inform the caller an let it decide how to handle it.
681 if (JB_ERR_MEMORY == enlist(csp->headers, header))
684 * XXX: Should we quit the request and return a
685 * out of memory error page instead?
687 log_error(LOG_LEVEL_ERROR,
688 "Out of memory while enlisting server headers. %s lost.",
698 /*********************************************************************
700 * Function : crunch_reason
702 * Description : Translates the crunch reason code into a string.
705 * 1 : rsp = a http_response
707 * Returns : A string with the crunch reason or an error description.
709 *********************************************************************/
710 static const char *crunch_reason(const struct http_response *rsp)
712 char * reason = NULL;
717 return "Internal error while searching for crunch reason";
720 switch (rsp->crunch_reason)
723 reason = "Unsupported HTTP feature";
729 reason = "Untrusted";
732 reason = "Redirected";
738 reason = "DNS failure";
740 case FORWARDING_FAILED:
741 reason = "Forwarding failed";
744 reason = "Connection failure";
747 reason = "Out of memory (may mask other reasons)";
749 case CONNECTION_TIMEOUT:
750 reason = "Connection timeout";
753 reason = "No server data received";
756 reason = "No reason recorded";
764 /*********************************************************************
766 * Function : log_applied_actions
768 * Description : Logs the applied actions if LOG_LEVEL_ACTIONS is
772 * 1 : actions = Current action spec to log
776 *********************************************************************/
777 static void log_applied_actions(const struct current_action_spec *actions)
780 * The conversion to text requires lots of memory allocations so
781 * we only do the conversion if the user is actually interested.
783 if (debug_level_is_enabled(LOG_LEVEL_ACTIONS))
785 char *actions_as_text = actions_to_line_of_text(actions);
786 log_error(LOG_LEVEL_ACTIONS, "%s", actions_as_text);
787 freez(actions_as_text);
792 /*********************************************************************
794 * Function : send_crunch_response
796 * Description : Delivers already prepared response for
797 * intercepted requests, logs the interception
798 * and frees the response.
801 * 1 : csp = Current client state (buffers, headers, etc...)
802 * 2 : rsp = Fully prepared response. Will be freed on exit.
806 *********************************************************************/
807 static void send_crunch_response(struct client_state *csp, struct http_response *rsp)
809 const struct http_request *http = csp->http;
813 assert(rsp->head != NULL);
817 log_error(LOG_LEVEL_FATAL, "NULL response in send_crunch_response.");
821 * Extract the status code from the actual head
822 * that will be send to the client. It is the only
823 * way to get it right for all requests, including
824 * the fixed ones for out-of-memory problems.
826 * A head starts like this: 'HTTP/1.1 200...'
830 status_code[0] = rsp->head[9];
831 status_code[1] = rsp->head[10];
832 status_code[2] = rsp->head[11];
833 status_code[3] = '\0';
835 /* Log that the request was crunched and why. */
836 log_applied_actions(csp->action);
837 #ifdef FEATURE_HTTPS_INSPECTION
838 if (client_use_ssl(csp))
840 log_error(LOG_LEVEL_CRUNCH, "%s: https://%s%s", crunch_reason(rsp),
841 http->hostport, http->path);
842 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s https://%s%s %s\" %s %lu",
843 csp->ip_addr_str, http->gpc, http->hostport, http->path,
844 http->version, status_code, rsp->content_length);
849 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
850 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %lu",
851 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
853 /* Write the answer to the client */
854 #ifdef FEATURE_HTTPS_INSPECTION
855 if (client_use_ssl(csp))
857 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
858 (const unsigned char *)rsp->head, rsp->head_length,
859 get_write_delay(csp)) < 0)
860 || (ssl_send_data_delayed(&(csp->ssl_client_attr),
861 (const unsigned char *)rsp->body, rsp->content_length,
862 get_write_delay(csp)) < 0))
864 /* There is nothing we can do about it. */
865 log_error(LOG_LEVEL_CONNECT, "Couldn't deliver the error message "
866 "for https://%s%s through client socket %d using TLS/SSL",
867 http->hostport, http->url, csp->cfd);
873 if (write_socket_delayed(csp->cfd, rsp->head, rsp->head_length,
874 get_write_delay(csp))
875 || write_socket_delayed(csp->cfd, rsp->body, rsp->content_length,
876 get_write_delay(csp)))
878 /* There is nothing we can do about it. */
879 log_error(LOG_LEVEL_CONNECT,
880 "Couldn't deliver the error message for %s through client socket %d: %E",
881 http->url, csp->cfd);
885 /* Clean up and return */
886 if (cgi_error_memory() != rsp)
888 free_http_response(rsp);
894 /*********************************************************************
896 * Function : crunch_response_triggered
898 * Description : Checks if the request has to be crunched,
899 * and delivers the crunch response if necessary.
902 * 1 : csp = Current client state (buffers, headers, etc...)
903 * 2 : crunchers = list of cruncher functions to run
905 * Returns : TRUE if the request was answered with a crunch response
908 *********************************************************************/
909 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
911 struct http_response *rsp = NULL;
912 const struct cruncher *c;
915 * If CGI request crunching is disabled,
916 * check the CGI dispatcher out of order to
917 * prevent unintentional blocks or redirects.
919 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
920 && (NULL != (rsp = dispatch_cgi(csp))))
922 /* Deliver, log and free the interception response. */
923 send_crunch_response(csp, rsp);
924 csp->flags |= CSP_FLAG_CRUNCHED;
928 for (c = crunchers; c->cruncher != NULL; c++)
931 * Check the cruncher if either Privoxy is toggled
932 * on and the request isn't forced, or if the cruncher
933 * applies to forced requests as well.
935 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
936 !(csp->flags & CSP_FLAG_FORCED)) ||
937 (c->flags & CF_IGNORE_FORCE))
939 rsp = c->cruncher(csp);
942 /* Deliver, log and free the interception response. */
943 send_crunch_response(csp, rsp);
944 csp->flags |= CSP_FLAG_CRUNCHED;
945 #ifdef FEATURE_STATISTICS
946 if (c->flags & CF_COUNT_AS_REJECT)
948 csp->flags |= CSP_FLAG_REJECTED;
950 #endif /* def FEATURE_STATISTICS */
961 /*********************************************************************
963 * Function : build_request_line
965 * Description : Builds the HTTP request line.
967 * If a HTTP forwarder is used it expects the whole URL,
968 * web servers only get the path.
971 * 1 : csp = Current client state (buffers, headers, etc...)
972 * 2 : fwd = The forwarding spec used for the request.
974 * 3 : request_line = The old request line which will be replaced.
976 * Returns : Nothing. Terminates in case of memory problems.
978 *********************************************************************/
979 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
981 struct http_request *http = csp->http;
984 * Downgrade http version from 1.1 to 1.0
985 * if +downgrade action applies.
987 if ((csp->action->flags & ACTION_DOWNGRADE)
988 && (!strcmpic(http->version, "HTTP/1.1")))
990 freez(http->version);
991 http->version = strdup_or_die("HTTP/1.0");
995 * Rebuild the request line.
997 freez(*request_line);
998 #ifdef FEATURE_HTTPS_INSPECTION
999 if (fwd != NULL && fwd->forward_host &&
1000 fwd->type != FORWARD_WEBSERVER && client_use_ssl(csp))
1002 *request_line = strdup("CONNECT ");
1007 *request_line = strdup(http->gpc);
1008 string_append(request_line, " ");
1011 if (fwd != NULL && fwd->forward_host && fwd->type != FORWARD_WEBSERVER)
1013 #ifdef FEATURE_HTTPS_INSPECTION
1014 if (client_use_ssl(csp))
1016 char port_string[10];
1018 string_append(request_line, http->host);
1019 snprintf(port_string, sizeof(port_string), ":%d", http->port);
1020 string_append(request_line, port_string);
1025 string_append(request_line, http->url);
1030 string_append(request_line, http->path);
1032 string_append(request_line, " ");
1033 string_append(request_line, http->version);
1035 if (*request_line == NULL)
1037 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1039 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
1043 /*********************************************************************
1045 * Function : change_request_destination
1047 * Description : Parse a (rewritten) request line and regenerate
1048 * the http request data.
1051 * 1 : csp = Current client state (buffers, headers, etc...)
1053 * Returns : Forwards the parse_http_request() return code.
1054 * Terminates in case of memory problems.
1056 *********************************************************************/
1057 static jb_err change_request_destination(struct client_state *csp)
1059 struct http_request *http = csp->http;
1062 log_error(LOG_LEVEL_REDIRECTS, "Rewrite detected: %s",
1063 csp->headers->first->str);
1064 free_http_request(http);
1065 err = parse_http_request(csp->headers->first->str, http);
1066 if (JB_ERR_OK != err)
1068 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
1069 jb_err_to_string(err));
1071 if (http->ssl && strcmpic(csp->http->gpc, "CONNECT"))
1074 * A client header filter changed the request URL from
1075 * http:// to https:// which we currently don't support.
1077 log_error(LOG_LEVEL_ERROR, "Changing the request destination from http "
1078 "to https behind the client's back currently isn't supported.");
1079 return JB_ERR_PARSE;
1086 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1087 /*********************************************************************
1089 * Function : server_response_is_complete
1091 * Description : Determines whether we should stop reading
1092 * from the server socket.
1095 * 1 : csp = Current client state (buffers, headers, etc...)
1096 * 2 : content_length = Length of content received so far.
1098 * Returns : TRUE if the response is complete,
1101 *********************************************************************/
1102 static int server_response_is_complete(struct client_state *csp,
1103 unsigned long long content_length)
1105 int content_length_known = !!(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
1107 if (!strcmpic(csp->http->gpc, "HEAD"))
1110 * "HEAD" implies no body, we are thus expecting
1111 * no content. XXX: incomplete "list" of methods?
1113 csp->expected_content_length = 0;
1114 content_length_known = TRUE;
1115 csp->flags |= CSP_FLAG_SERVER_CONTENT_LENGTH_SET;
1118 if (csp->http->status == 204 || csp->http->status == 304)
1121 * Expect no body. XXX: incomplete "list" of status codes?
1123 csp->expected_content_length = 0;
1124 content_length_known = TRUE;
1125 csp->flags |= CSP_FLAG_SERVER_CONTENT_LENGTH_SET;
1128 return (content_length_known && ((0 == csp->expected_content_length)
1129 || (csp->expected_content_length <= content_length)));
1133 #ifdef FEATURE_CONNECTION_SHARING
1134 /*********************************************************************
1136 * Function : wait_for_alive_connections
1138 * Description : Waits for alive connections to timeout.
1144 *********************************************************************/
1145 static void wait_for_alive_connections(void)
1147 int connections_alive = close_unusable_connections();
1149 while (0 < connections_alive)
1151 log_error(LOG_LEVEL_CONNECT,
1152 "Waiting for %d connections to timeout.",
1155 connections_alive = close_unusable_connections();
1158 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
1161 #endif /* def FEATURE_CONNECTION_SHARING */
1164 /*********************************************************************
1166 * Function : save_connection_destination
1168 * Description : Remembers a connection for reuse later on.
1171 * 1 : sfd = Open socket to remember.
1172 * 2 : http = The destination for the connection.
1173 * 3 : fwd = The forwarder settings used.
1174 * 4 : server_connection = storage.
1178 *********************************************************************/
1179 static void save_connection_destination(jb_socket sfd,
1180 const struct http_request *http,
1181 const struct forward_spec *fwd,
1182 struct reusable_connection *server_connection)
1184 assert(sfd != JB_INVALID_SOCKET);
1185 assert(NULL != http->host);
1187 server_connection->sfd = sfd;
1188 server_connection->host = strdup_or_die(http->host);
1189 server_connection->port = http->port;
1191 assert(NULL != fwd);
1192 assert(server_connection->gateway_host == NULL);
1193 assert(server_connection->gateway_port == 0);
1194 assert(server_connection->forwarder_type == 0);
1195 assert(server_connection->forward_host == NULL);
1196 assert(server_connection->forward_port == 0);
1198 server_connection->forwarder_type = fwd->type;
1199 if (NULL != fwd->gateway_host)
1201 server_connection->gateway_host = strdup_or_die(fwd->gateway_host);
1205 server_connection->gateway_host = NULL;
1207 server_connection->gateway_port = fwd->gateway_port;
1208 if (NULL != fwd->auth_username)
1210 server_connection->auth_username = strdup_or_die(fwd->auth_username);
1214 server_connection->auth_username = NULL;
1216 if (NULL != fwd->auth_password)
1218 server_connection->auth_password = strdup_or_die(fwd->auth_password);
1222 server_connection->auth_password = NULL;
1225 if (NULL != fwd->forward_host)
1227 server_connection->forward_host = strdup_or_die(fwd->forward_host);
1231 server_connection->forward_host = NULL;
1233 server_connection->forward_port = fwd->forward_port;
1235 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1238 /*********************************************************************
1240 * Function : verify_request_length
1242 * Description : Checks if we already got the whole client requests
1243 * and sets CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ if
1246 * Data that doesn't belong to the current request is
1247 * either thrown away to let the client retry on a clean
1248 * socket, or stashed to be dealt with after the current
1249 * request is served.
1252 * 1 : csp = Current client state (buffers, headers, etc...)
1256 *********************************************************************/
1257 static void verify_request_length(struct client_state *csp)
1259 unsigned long long buffered_request_bytes =
1260 (unsigned long long)(csp->client_iob->eod - csp->client_iob->cur);
1262 if ((csp->expected_client_content_length != 0)
1263 && (buffered_request_bytes != 0))
1265 if (csp->expected_client_content_length >= buffered_request_bytes)
1267 csp->expected_client_content_length -= buffered_request_bytes;
1268 log_error(LOG_LEVEL_CONNECT, "Reduced expected bytes to %llu "
1269 "to account for the %llu ones we already got.",
1270 csp->expected_client_content_length, buffered_request_bytes);
1274 assert(csp->client_iob->eod > csp->client_iob->cur + csp->expected_client_content_length);
1275 csp->client_iob->eod = csp->client_iob->cur + csp->expected_client_content_length;
1276 log_error(LOG_LEVEL_CONNECT, "Reducing expected bytes to 0. "
1277 "Marking the server socket tainted after throwing %llu bytes away.",
1278 buffered_request_bytes - csp->expected_client_content_length);
1279 csp->expected_client_content_length = 0;
1280 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1283 if (csp->expected_client_content_length == 0)
1285 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1289 if (!(csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ)
1290 && ((csp->client_iob->cur < csp->client_iob->eod)
1291 || (csp->expected_client_content_length != 0)))
1293 if (strcmpic(csp->http->gpc, "GET")
1294 && strcmpic(csp->http->gpc, "HEAD")
1295 && strcmpic(csp->http->gpc, "TRACE")
1296 && strcmpic(csp->http->gpc, "OPTIONS")
1297 && strcmpic(csp->http->gpc, "DELETE"))
1299 /* XXX: this is an incomplete hack */
1300 csp->flags &= ~CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1301 log_error(LOG_LEVEL_CONNECT, "There better be a request body.");
1305 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1307 if ((csp->config->feature_flags & RUNTIME_FEATURE_TOLERATE_PIPELINING) == 0)
1309 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1310 log_error(LOG_LEVEL_CONNECT,
1311 "Possible pipeline attempt detected. The connection will not "
1312 "be kept alive and we will only serve the first request.");
1313 /* Nuke the pipelined requests from orbit, just to be sure. */
1314 clear_iob(csp->client_iob);
1319 * Keep the pipelined data around for now, we'll deal with
1320 * it once we're done serving the current request.
1322 csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
1323 assert(csp->client_iob->eod >= csp->client_iob->cur);
1324 log_error(LOG_LEVEL_CONNECT, "Complete client request followed by "
1325 "%d bytes of pipelined data received.",
1326 (int)(csp->client_iob->eod - csp->client_iob->cur));
1332 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1333 log_error(LOG_LEVEL_CONNECT, "Complete client request received.");
1338 /*********************************************************************
1340 * Function : mark_server_socket_tainted
1342 * Description : Makes sure we don't reuse a server socket
1343 * (if we didn't read everything the server sent
1344 * us reusing the socket would lead to garbage).
1347 * 1 : csp = Current client state (buffers, headers, etc...)
1351 *********************************************************************/
1352 static void mark_server_socket_tainted(struct client_state *csp)
1355 * For consistency we always mark the server socket
1356 * tainted, however, to reduce the log noise we only
1357 * emit a log message if the server socket could have
1358 * actually been reused.
1360 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
1361 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED))
1363 log_error(LOG_LEVEL_CONNECT,
1364 "Marking the server socket %d tainted.",
1365 csp->server_connection.sfd);
1367 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1370 /*********************************************************************
1372 * Function : get_request_line
1374 * Description : Read the client request line.
1377 * 1 : csp = Current client state (buffers, headers, etc...)
1379 * Returns : Pointer to request line or NULL in case of errors.
1381 *********************************************************************/
1382 static char *get_request_line(struct client_state *csp)
1384 char buf[BUFFER_SIZE];
1385 char *request_line = NULL;
1388 memset(buf, 0, sizeof(buf));
1390 if ((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) != 0)
1393 * If there are multiple pipelined requests waiting,
1394 * the flag will be set again once the next request
1397 csp->flags &= ~CSP_FLAG_PIPELINED_REQUEST_WAITING;
1399 request_line = get_header(csp->client_iob);
1400 if ((NULL != request_line) && ('\0' != *request_line))
1402 return request_line;
1406 log_error(LOG_LEVEL_CONNECT, "No complete request line "
1407 "received yet. Continuing reading from %d.", csp->cfd);
1415 0 == (csp->flags & CSP_FLAG_FUZZED_INPUT) &&
1417 !data_is_available(csp->cfd, csp->config->socket_timeout)
1420 if (socket_is_still_alive(csp->cfd))
1422 log_error(LOG_LEVEL_CONNECT,
1423 "No request line on socket %d received in time. Timeout: %d.",
1424 csp->cfd, csp->config->socket_timeout);
1425 write_socket_delayed(csp->cfd, CLIENT_CONNECTION_TIMEOUT_RESPONSE,
1426 strlen(CLIENT_CONNECTION_TIMEOUT_RESPONSE),
1427 get_write_delay(csp));
1431 log_error(LOG_LEVEL_CONNECT,
1432 "The client side of the connection on socket %d got "
1433 "closed without sending a complete request line.", csp->cfd);
1438 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1440 if (len <= 0) return NULL;
1443 * If there is no memory left for buffering the
1444 * request, there is nothing we can do but hang up
1446 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
1451 request_line = get_header(csp->client_iob);
1453 } while ((NULL != request_line) && ('\0' == *request_line));
1455 return request_line;
1461 CHUNK_STATUS_MISSING_DATA,
1462 CHUNK_STATUS_BODY_COMPLETE,
1463 CHUNK_STATUS_PARSE_ERROR
1467 /*********************************************************************
1469 * Function : chunked_body_is_complete
1471 * Description : Figures out whether or not a chunked body is complete.
1473 * Currently it always starts at the beginning of the
1474 * buffer which is somewhat wasteful and prevents Privoxy
1475 * from starting to forward the correctly parsed chunks
1476 * as soon as theoretically possible.
1478 * Should be modified to work with a common buffer,
1479 * and allow the caller to skip already parsed chunks.
1481 * This would allow the function to be used for unbuffered
1482 * response bodies as well.
1485 * 1 : iob = Buffer with the body to check.
1486 * 2 : length = Length of complete body
1488 * Returns : Enum with the result of the check.
1490 *********************************************************************/
1491 static enum chunk_status chunked_body_is_complete(struct iob *iob, size_t *length)
1493 unsigned int chunksize;
1499 * We need at least a single digit, followed by "\r\n",
1500 * followed by an unknown amount of data, followed by "\r\n".
1502 if (p + 5 > iob->eod)
1504 return CHUNK_STATUS_MISSING_DATA;
1506 if (sscanf(p, "%x", &chunksize) != 1)
1508 return CHUNK_STATUS_PARSE_ERROR;
1512 * We want at least a single digit, followed by "\r\n",
1513 * followed by the specified amount of data, followed by "\r\n".
1515 if (p + chunksize + 5 > iob->eod)
1517 return CHUNK_STATUS_MISSING_DATA;
1520 /* Skip chunk-size. */
1521 p = strstr(p, "\r\n");
1524 return CHUNK_STATUS_PARSE_ERROR;
1526 /* Move beyond the chunkdata. */
1529 /* Make sure we're still within the buffer and have two bytes left */
1530 if (p + 2 > iob->eod)
1532 return CHUNK_STATUS_MISSING_DATA;
1535 /* There should be another "\r\n" to skip */
1536 if (memcmp(p, "\r\n", 2))
1538 return CHUNK_STATUS_PARSE_ERROR;
1541 } while (chunksize > 0U);
1543 *length = (size_t)(p - iob->cur);
1544 assert(*length <= (size_t)(iob->eod - iob->cur));
1545 assert(p <= iob->eod);
1547 return CHUNK_STATUS_BODY_COMPLETE;
1552 /*********************************************************************
1554 * Function : receive_chunked_client_request_body
1556 * Description : Read the chunk-encoded client request body.
1557 * Failures are dealt with.
1560 * 1 : csp = Current client state (buffers, headers, etc...)
1562 * Returns : JB_ERR_OK or JB_ERR_PARSE
1564 *********************************************************************/
1565 static jb_err receive_chunked_client_request_body(struct client_state *csp)
1568 enum chunk_status status;
1570 while (CHUNK_STATUS_MISSING_DATA ==
1571 (status = chunked_body_is_complete(csp->client_iob, &body_length)))
1573 char buf[BUFFER_SIZE];
1576 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1578 log_error(LOG_LEVEL_ERROR,
1579 "Timeout while waiting for the client body.");
1582 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1585 log_error(LOG_LEVEL_ERROR,
1586 "Reading the client body failed: %E");
1589 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
1594 if (status != CHUNK_STATUS_BODY_COMPLETE)
1596 write_socket_delayed(csp->cfd, CLIENT_BODY_PARSE_ERROR_RESPONSE,
1597 strlen(CLIENT_BODY_PARSE_ERROR_RESPONSE), get_write_delay(csp));
1598 log_error(LOG_LEVEL_CLF,
1599 "%s - - [%T] \"Failed reading chunked client body\" 400 0", csp->ip_addr_str);
1600 return JB_ERR_PARSE;
1602 log_error(LOG_LEVEL_CONNECT,
1603 "Chunked client body completely read. Length: %lu", body_length);
1604 csp->expected_client_content_length = body_length;
1612 /*********************************************************************
1614 * Function : fuzz_chunked_transfer_encoding
1616 * Description : Treat the fuzzed input as chunked transfer encoding
1617 * to check and dechunk.
1620 * 1 : csp = Used to store the data.
1621 * 2 : fuzz_input_file = File to read the input from.
1623 * Returns : Result of dechunking
1625 *********************************************************************/
1626 extern int fuzz_chunked_transfer_encoding(struct client_state *csp, char *fuzz_input_file)
1629 size_t size = (size_t)(csp->iob->eod - csp->iob->cur);
1630 enum chunk_status status;
1632 status = chunked_body_is_complete(csp->iob, &length);
1633 if (CHUNK_STATUS_BODY_COMPLETE != status)
1635 log_error(LOG_LEVEL_INFO, "Chunked body is incomplete or invalid");
1638 return (JB_ERR_OK == remove_chunked_transfer_coding(csp->iob->cur, &size));
1643 /*********************************************************************
1645 * Function : fuzz_client_request
1647 * Description : Try to get a client request from the fuzzed input.
1650 * 1 : csp = Current client state (buffers, headers, etc...)
1651 * 2 : fuzz_input_file = File to read the input from.
1653 * Returns : Result of fuzzing.
1655 *********************************************************************/
1656 extern int fuzz_client_request(struct client_state *csp, char *fuzz_input_file)
1661 csp->ip_addr_str = "fuzzer";
1663 if (strcmp(fuzz_input_file, "-") != 0)
1665 log_error(LOG_LEVEL_FATAL,
1666 "Fuzzed client requests can currently only be read from stdin (-).");
1668 err = receive_client_request(csp);
1669 if (err != JB_ERR_OK)
1673 err = parse_client_request(csp);
1674 if (err != JB_ERR_OK)
1682 #endif /* def FUZZ */
1685 #ifdef FEATURE_FORCE_LOAD
1686 /*********************************************************************
1688 * Function : force_required
1690 * Description : Checks a request line to see if it contains
1691 * the FORCE_PREFIX. If it does, it is removed
1692 * unless enforcing requests has beend disabled.
1695 * 1 : request_line = HTTP request line
1697 * Returns : TRUE if force is required, FALSE otherwise.
1699 *********************************************************************/
1700 static int force_required(const struct client_state *csp, char *request_line)
1704 p = strstr(request_line, "http://");
1708 p += strlen("http://");
1712 /* Intercepted request usually don't specify the protocol. */
1716 /* Go to the beginning of the path */
1721 * If the path is missing the request line is invalid and we
1722 * are done here. The client-visible rejection happens later on.
1727 if (0 == strncmpic(p, FORCE_PREFIX, strlen(FORCE_PREFIX) - 1))
1729 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS))
1731 /* XXX: Should clean more carefully */
1732 strclean(request_line, FORCE_PREFIX);
1733 log_error(LOG_LEVEL_FORCE,
1734 "Enforcing request: \"%s\".", request_line);
1738 log_error(LOG_LEVEL_FORCE,
1739 "Ignored force prefix in request: \"%s\".", request_line);
1745 #endif /* def FEATURE_FORCE_LOAD */
1748 /*********************************************************************
1750 * Function : receive_client_request
1752 * Description : Read the client's request (more precisely the
1753 * client headers) and answer it if necessary.
1756 * 1 : csp = Current client state (buffers, headers, etc...)
1758 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
1760 *********************************************************************/
1761 static jb_err receive_client_request(struct client_state *csp)
1763 char buf[BUFFER_SIZE];
1766 struct http_request *http;
1770 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1771 struct list header_list;
1772 struct list *headers = &header_list;
1774 /* We don't care if the arriving data is a valid HTTP request or not. */
1775 csp->requests_received_total++;
1779 memset(buf, 0, sizeof(buf));
1781 req = get_request_line(csp);
1784 mark_server_socket_tainted(csp);
1785 return JB_ERR_PARSE;
1787 assert(*req != '\0');
1789 if (client_protocol_is_unsupported(csp, req))
1791 return JB_ERR_PARSE;
1794 #ifdef FEATURE_FORCE_LOAD
1795 if (force_required(csp, req))
1797 csp->flags |= CSP_FLAG_FORCED;
1799 #endif /* def FEATURE_FORCE_LOAD */
1801 err = parse_http_request(req, http);
1803 if (JB_ERR_OK != err)
1805 write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER),
1806 get_write_delay(csp));
1807 /* XXX: Use correct size */
1808 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1809 log_error(LOG_LEVEL_ERROR,
1810 "Couldn't parse request line received from %s: %s",
1811 csp->ip_addr_str, jb_err_to_string(err));
1813 free_http_request(http);
1814 return JB_ERR_PARSE;
1817 /* grab the rest of the client's headers */
1821 p = get_header(csp->client_iob);
1825 /* There are no additional headers to read. */
1832 * We didn't receive a complete header
1833 * line yet, get the rest of it.
1835 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1837 log_error(LOG_LEVEL_ERROR,
1838 "Stopped grabbing the client headers.");
1839 destroy_list(headers);
1840 return JB_ERR_PARSE;
1843 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1846 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1847 destroy_list(headers);
1848 return JB_ERR_PARSE;
1851 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
1854 * If there is no memory left for buffering the
1855 * request, there is nothing we can do but hang up
1857 destroy_list(headers);
1858 return JB_ERR_MEMORY;
1863 if (!strncmpic(p, "Transfer-Encoding:", 18))
1866 * XXX: should be called through sed()
1867 * but currently can't.
1869 client_transfer_encoding(csp, &p);
1872 * We were able to read a complete
1873 * header and can finally enlist it.
1880 if (http->host == NULL)
1883 * If we still don't know the request destination,
1884 * the request is invalid or the client uses
1885 * Privoxy without its knowledge.
1887 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1890 * Our attempts to get the request destination
1891 * elsewhere failed or Privoxy is configured
1892 * to only accept proxy requests.
1894 * An error response has already been sent
1895 * and we're done here.
1897 return JB_ERR_PARSE;
1901 #ifdef FEATURE_CLIENT_TAGS
1902 /* XXX: If the headers were enlisted sooner, passing csp would do. */
1903 set_client_address(csp, headers);
1904 get_tag_list_for_client(csp->client_tags, csp->client_address);
1908 * Determine the actions for this URL
1910 #ifdef FEATURE_TOGGLE
1911 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1913 /* Most compatible set of actions (i.e. none) */
1914 init_current_action(csp->action);
1917 #endif /* ndef FEATURE_TOGGLE */
1919 get_url_actions(csp, http);
1922 enlist(csp->headers, http->cmd);
1924 /* Append the previously read headers */
1925 err = list_append_list_unique(csp->headers, headers);
1926 destroy_list(headers);
1933 /*********************************************************************
1935 * Function : parse_client_request
1937 * Description : Parses the client's request and decides what to do
1940 * Note that since we're not using select() we could get
1941 * blocked here if a client connected, then didn't say
1945 * 1 : csp = Current client state (buffers, headers, etc...)
1947 * Returns : JB_ERR_OK or JB_ERR_PARSE
1949 *********************************************************************/
1950 static jb_err parse_client_request(struct client_state *csp)
1952 struct http_request *http = csp->http;
1955 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1956 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
1957 && (!strcmpic(csp->http->version, "HTTP/1.1"))
1958 && (csp->http->ssl == 0))
1960 /* Assume persistence until further notice */
1961 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
1963 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1965 if (csp->http->ssl == 0)
1968 * This whole block belongs to chat() but currently
1969 * has to be executed before sed().
1971 if (csp->flags & CSP_FLAG_CHUNKED_CLIENT_BODY)
1973 if (receive_chunked_client_request_body(csp) != JB_ERR_OK)
1975 return JB_ERR_PARSE;
1980 csp->expected_client_content_length = get_expected_content_length(csp->headers);
1982 verify_request_length(csp);
1984 #ifndef FEATURE_HTTPS_INSPECTION
1987 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1991 err = sed(csp, FILTER_CLIENT_HEADERS);
1992 if (JB_ERR_OK != err)
1994 log_error(LOG_LEVEL_ERROR, "Failed to parse client request from %s.",
1996 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1997 csp->ip_addr_str, csp->http->cmd);
1998 write_socket_delayed(csp->cfd, CHEADER, strlen(CHEADER), get_write_delay(csp));
1999 return JB_ERR_PARSE;
2001 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2003 /* Check request line for rewrites. */
2004 if ((NULL == csp->headers->first->str)
2005 || (strcmp(http->cmd, csp->headers->first->str) &&
2006 (JB_ERR_OK != change_request_destination(csp))))
2009 * A header filter broke the request line - bail out.
2011 write_socket_delayed(csp->cfd, MESSED_UP_REQUEST_RESPONSE,
2012 strlen(MESSED_UP_REQUEST_RESPONSE), get_write_delay(csp));
2013 /* XXX: Use correct size */
2014 log_error(LOG_LEVEL_CLF,
2015 "%s - - [%T] \"Invalid request generated\" 400 0", csp->ip_addr_str);
2016 log_error(LOG_LEVEL_ERROR,
2017 "Invalid request line after applying header filters.");
2018 free_http_request(http);
2020 return JB_ERR_PARSE;
2023 if (client_has_unsupported_expectations(csp))
2025 return JB_ERR_PARSE;
2033 /*********************************************************************
2035 * Function : read_http_request_body
2037 * Description : Reads remaining request body from the client.
2040 * 1 : csp = Current client state (buffers, headers, etc...)
2042 * Returns : 0 on success, anything else is an error.
2044 *********************************************************************/
2045 static int read_http_request_body(struct client_state *csp)
2047 size_t to_read = csp->expected_client_content_length;
2050 assert(to_read != 0);
2052 /* check if all data has been already read */
2053 if (to_read <= (csp->client_iob->eod - csp->client_iob->cur))
2058 for (to_read -= (size_t)(csp->client_iob->eod - csp->client_iob->cur);
2059 to_read > 0 && data_is_available(csp->cfd, csp->config->socket_timeout);
2060 to_read -= (unsigned)len)
2062 char buf[BUFFER_SIZE];
2063 size_t max_bytes_to_read = to_read < sizeof(buf) ? to_read : sizeof(buf);
2065 log_error(LOG_LEVEL_CONNECT,
2066 "Waiting for up to %lu bytes of request body from the client.",
2068 len = read_socket(csp->cfd, buf, (int)max_bytes_to_read);
2071 log_error(LOG_LEVEL_CONNECT, "Failed receiving request body from %s: %E", csp->ip_addr_str);
2074 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, (char *)buf, len))
2078 assert(to_read >= len);
2083 log_error(LOG_LEVEL_CONNECT, "Not enough request body has been read: expected %llu more bytes",
2084 csp->expected_client_content_length);
2087 log_error(LOG_LEVEL_CONNECT, "The last %llu bytes of the request body have been read",
2088 csp->expected_client_content_length);
2093 /*********************************************************************
2095 * Function : update_client_headers
2097 * Description : Updates the HTTP headers from the client request.
2100 * 1 : csp = Current client state (buffers, headers, etc...)
2101 * 2 : new_content_length = new content length value to set
2103 * Returns : 0 on success, anything else is an error.
2105 *********************************************************************/
2106 static int update_client_headers(struct client_state *csp, size_t new_content_length)
2108 static const char content_length[] = "Content-Length:";
2110 struct list_entry *p;
2112 #ifndef FEATURE_HTTPS_INSPECTION
2113 for (p = csp->headers->first;
2115 for (p = csp->http->client_ssl ? csp->https_headers->first : csp->headers->first;
2117 !updated && (p != NULL); p = p->next)
2119 /* Header crunch()ed in previous run? -> ignore */
2125 /* Does the current parser handle this header? */
2126 if (0 == strncmpic(p->str, content_length, sizeof(content_length) - 1))
2128 updated = (JB_ERR_OK == header_adjust_content_length((char **)&(p->str), new_content_length));
2140 /*********************************************************************
2142 * Function : can_filter_request_body
2144 * Description : Checks if the current request body can be stored in
2145 * the client_iob without hitting buffer limit.
2148 * 1 : csp = Current client state (buffers, headers, etc...)
2150 * Returns : TRUE if the current request size do not exceed buffer limit
2153 *********************************************************************/
2154 static int can_filter_request_body(const struct client_state *csp)
2156 if (!can_add_to_iob(csp->client_iob, csp->config->buffer_limit,
2157 csp->expected_client_content_length))
2159 log_error(LOG_LEVEL_INFO,
2160 "Not filtering request body from %s: buffer limit %lu will be exceeded "
2161 "(content length %lluu)", csp->ip_addr_str, csp->config->buffer_limit,
2162 csp->expected_client_content_length);
2169 /*********************************************************************
2171 * Function : send_http_request
2173 * Description : Sends the HTTP headers from the client request
2174 * and all the body data that has already been received.
2177 * 1 : csp = Current client state (buffers, headers, etc...)
2179 * Returns : 0 on success, anything else is an error.
2181 *********************************************************************/
2182 static int send_http_request(struct client_state *csp)
2186 const char *to_send;
2188 int filter_client_body = csp->expected_client_content_length != 0 &&
2189 client_body_filters_enabled(csp->action) && can_filter_request_body(csp);
2191 if (filter_client_body)
2193 if (read_http_request_body(csp))
2197 to_send_len = csp->expected_client_content_length;
2198 to_send = execute_client_body_filters(csp, &to_send_len);
2199 if (to_send == NULL)
2201 /* just flush client_iob */
2202 filter_client_body = FALSE;
2204 else if (to_send_len != csp->expected_client_content_length &&
2205 update_client_headers(csp, to_send_len))
2207 log_error(LOG_LEVEL_HEADER, "Error updating client headers");
2210 csp->expected_client_content_length = 0;
2213 hdr = list_to_text(csp->headers);
2216 /* FIXME Should handle error properly */
2217 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2219 list_remove_all(csp->headers);
2222 * Write the client's (modified) header to the server
2223 * (along with anything else that may be in the buffer)
2225 write_failure = 0 != write_socket(csp->server_connection.sfd, hdr, strlen(hdr));
2230 log_error(LOG_LEVEL_CONNECT, "Failed sending request headers to: %s: %E",
2231 csp->http->hostport);
2235 if (filter_client_body)
2237 write_failure = 0 != write_socket(csp->server_connection.sfd, to_send, to_send_len);
2241 log_error(LOG_LEVEL_CONNECT, "Failed sending filtered request body to: %s: %E",
2242 csp->http->hostport);
2247 if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) == 0)
2248 && (flush_iob(csp->server_connection.sfd, csp->client_iob, 0) < 0))
2250 log_error(LOG_LEVEL_CONNECT, "Failed sending request body to: %s: %E",
2251 csp->http->hostport);
2258 #ifdef FEATURE_HTTPS_INSPECTION
2259 /*********************************************************************
2261 * Function : read_https_request_body
2263 * Description : Reads remaining request body from the client.
2266 * 1 : csp = Current client state (buffers, headers, etc...)
2268 * Returns : 0 on success, anything else is an error.
2270 *********************************************************************/
2271 static int read_https_request_body(struct client_state *csp)
2273 size_t to_read = csp->expected_client_content_length;
2276 assert(to_read != 0);
2278 /* check if all data has been already read */
2279 if (to_read <= (csp->client_iob->eod - csp->client_iob->cur))
2284 for (to_read -= (size_t)(csp->client_iob->eod - csp->client_iob->cur);
2285 to_read > 0 && (is_ssl_pending(&(csp->ssl_client_attr)) ||
2286 data_is_available(csp->cfd, csp->config->socket_timeout));
2287 to_read -= (unsigned)len)
2289 unsigned char buf[BUFFER_SIZE];
2290 size_t max_bytes_to_read = to_read < sizeof(buf) ? to_read : sizeof(buf);
2292 log_error(LOG_LEVEL_CONNECT,
2293 "Waiting for up to %lu bytes of request body from the client.",
2295 len = ssl_recv_data(&(csp->ssl_client_attr), buf,
2296 (unsigned)max_bytes_to_read);
2299 log_error(LOG_LEVEL_CONNECT, "Failed receiving request body from %s", csp->ip_addr_str);
2302 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, (char *)buf, len))
2306 assert(to_read >= len);
2311 log_error(LOG_LEVEL_CONNECT,
2312 "Not enough request body has been read: expected %lu more bytes",
2317 log_error(LOG_LEVEL_CONNECT,
2318 "The last %llu bytes of the request body have been read",
2319 csp->expected_client_content_length);
2324 /*********************************************************************
2326 * Function : receive_and_send_encrypted_post_data
2328 * Description : Reads remaining request body from the client and sends
2332 * 1 : csp = Current client state (buffers, headers, etc...)
2334 * Returns : 0 on success, anything else is an error.
2336 *********************************************************************/
2337 static int receive_and_send_encrypted_post_data(struct client_state *csp)
2339 int content_length_known = csp->expected_client_content_length != 0;
2341 while (is_ssl_pending(&(csp->ssl_client_attr))
2342 || (content_length_known && csp->expected_client_content_length != 0))
2344 unsigned char buf[BUFFER_SIZE];
2346 int max_bytes_to_read = sizeof(buf);
2348 if (content_length_known && csp->expected_client_content_length < sizeof(buf))
2350 max_bytes_to_read = (int)csp->expected_client_content_length;
2352 log_error(LOG_LEVEL_CONNECT,
2353 "Waiting for up to %d bytes of request body from the client.",
2355 len = ssl_recv_data(&(csp->ssl_client_attr), buf,
2356 (unsigned)max_bytes_to_read);
2363 /* XXX: Does this actually happen? */
2366 log_error(LOG_LEVEL_CONNECT, "Forwarding %d bytes of encrypted request body",
2368 len = ssl_send_data(&(csp->ssl_server_attr), buf, (size_t)len);
2373 if (csp->expected_client_content_length != 0)
2375 if (csp->expected_client_content_length >= len)
2377 csp->expected_client_content_length -= (unsigned)len;
2379 if (csp->expected_client_content_length == 0)
2381 log_error(LOG_LEVEL_CONNECT, "Forwarded the last %d bytes", len);
2387 log_error(LOG_LEVEL_CONNECT, "Done forwarding encrypted request body");
2394 /*********************************************************************
2396 * Function : send_https_request
2398 * Description : Sends the HTTP headers from the client request
2399 * and all the body data that has already been received.
2402 * 1 : csp = Current client state (buffers, headers, etc...)
2404 * Returns : 0 on success, anything else is an error.
2406 *********************************************************************/
2407 static int send_https_request(struct client_state *csp)
2412 const char *to_send;
2414 int filter_client_body = csp->expected_client_content_length != 0 &&
2415 client_body_filters_enabled(csp->action) && can_filter_request_body(csp);
2417 if (filter_client_body)
2419 if (read_https_request_body(csp))
2423 to_send_len = csp->expected_client_content_length;
2424 to_send = execute_client_body_filters(csp, &to_send_len);
2425 if (to_send == NULL)
2427 /* just flush client_iob */
2428 filter_client_body = FALSE;
2430 else if (to_send_len != csp->expected_client_content_length &&
2431 update_client_headers(csp, to_send_len))
2433 log_error(LOG_LEVEL_HEADER, "Error updating client headers");
2436 csp->expected_client_content_length = 0;
2439 hdr = list_to_text(csp->https_headers);
2442 /* FIXME Should handle error properly */
2443 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2445 list_remove_all(csp->https_headers);
2448 * Write the client's (modified) header to the server
2449 * (along with anything else that may be in the buffer)
2451 ret = ssl_send_data(&(csp->ssl_server_attr),
2452 (const unsigned char *)hdr, strlen(hdr));
2457 log_error(LOG_LEVEL_CONNECT,
2458 "Failed sending encrypted request headers to: %s: %E",
2459 csp->http->hostport);
2460 mark_server_socket_tainted(csp);
2464 if (filter_client_body)
2466 ret = ssl_send_data(&(csp->ssl_server_attr), (const unsigned char *)to_send, to_send_len);
2470 log_error(LOG_LEVEL_CONNECT, "Failed sending filtered request body to: %s",
2471 csp->http->hostport);
2476 if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) == 0)
2477 && ((flushed = ssl_flush_socket(&(csp->ssl_server_attr),
2478 csp->client_iob)) < 0))
2480 log_error(LOG_LEVEL_CONNECT, "Failed sending request body to: %s: %E",
2481 csp->http->hostport);
2484 if (flushed != 0 || csp->expected_client_content_length != 0)
2486 if (csp->expected_client_content_length != 0)
2488 if (csp->expected_client_content_length < flushed)
2490 log_error(LOG_LEVEL_ERROR,
2491 "Flushed %ld bytes of request body while only expecting %llu",
2492 flushed, csp->expected_client_content_length);
2493 csp->expected_client_content_length = 0;
2497 log_error(LOG_LEVEL_CONNECT,
2498 "Flushed %ld bytes of request body while expecting %llu",
2499 flushed, csp->expected_client_content_length);
2500 csp->expected_client_content_length -= (unsigned)flushed;
2501 if (receive_and_send_encrypted_post_data(csp))
2509 log_error(LOG_LEVEL_CONNECT,
2510 "Flushed %ld bytes of request body", flushed);
2514 log_error(LOG_LEVEL_CONNECT, "Encrypted request sent");
2521 /*********************************************************************
2523 * Function : receive_encrypted_request
2525 * Description : Receives an encrypted request.
2528 * 1 : csp = Current client state (buffers, headers, etc...)
2530 * Returns : JB_ERR_OK on success,
2531 * JB_ERR_PARSE or JB_ERR_MEMORY otherwise
2533 *********************************************************************/
2534 static jb_err receive_encrypted_request(struct client_state *csp)
2536 char buf[BUFFER_SIZE];
2542 log_error(LOG_LEVEL_HEADER, "Reading encrypted headers");
2543 if (!is_ssl_pending(&(csp->ssl_client_attr)) &&
2544 !data_is_available(csp->cfd, csp->config->socket_timeout))
2546 log_error(LOG_LEVEL_CONNECT,
2547 "Socket %d timed out while waiting for client headers", csp->cfd);
2548 return JB_ERR_PARSE;
2550 len = ssl_recv_data(&(csp->ssl_client_attr),
2551 (unsigned char *)buf, sizeof(buf));
2554 log_error(LOG_LEVEL_CONNECT,
2555 "Socket %d closed while waiting for client headers", csp->cfd);
2556 return JB_ERR_PARSE;
2560 return JB_ERR_PARSE;
2562 if (add_to_iob(csp->client_iob, csp->config->buffer_limit, buf, len))
2564 return JB_ERR_MEMORY;
2566 p = strstr(csp->client_iob->cur, "\r\n\r\n");
2567 } while (p == NULL);
2569 log_error(LOG_LEVEL_HEADER, "Encrypted headers received completely");
2575 /*********************************************************************
2577 * Function : change_encrypted_request_destination
2579 * Description : Parse a (rewritten) request line from an encrypted
2580 * request and regenerate the http request data.
2583 * 1 : csp = Current client state (buffers, headers, etc...)
2585 * Returns : Forwards the parse_http_request() return code.
2586 * Terminates in case of memory problems.
2588 *********************************************************************/
2589 static jb_err change_encrypted_request_destination(struct client_state *csp)
2592 char *original_host = csp->http->host;
2593 int original_port = csp->http->port;
2595 log_error(LOG_LEVEL_REDIRECTS, "Rewrite detected: %s",
2596 csp->https_headers->first->str);
2597 csp->http->host = NULL;
2598 free_http_request(csp->http);
2599 err = parse_http_request(csp->https_headers->first->str, csp->http);
2600 if (JB_ERR_OK != err)
2602 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2603 jb_err_to_string(err));
2604 freez(original_host);
2608 if (csp->http->host == NULL)
2610 char port_string[10];
2612 * The rewritten request line did not specify a host
2613 * which means we can use the original host specified
2616 csp->http->host = original_host;
2617 csp->http->port = original_port;
2618 log_error(LOG_LEVEL_REDIRECTS, "Keeping the original host: %s",
2621 * If the rewritten request line didn't contain a host
2622 * it also didn't contain a port so we can reuse the host
2625 freez(csp->http->hostport);
2626 csp->http->hostport = strdup_or_die(csp->http->host);
2627 snprintf(port_string, sizeof(port_string), ":%d", original_port);
2628 err = string_append(&csp->http->hostport, port_string);
2629 if (err != JB_ERR_OK)
2631 log_error(LOG_LEVEL_ERROR, "Failed to rebuild hostport: %s.",
2632 jb_err_to_string(err));
2637 * While the request line didn't mention it,
2638 * we're https-inspecting and want to speak TLS
2641 csp->http->server_ssl = 1;
2646 /* The rewrite filter added a host so we can ditch the original */
2647 freez(original_host);
2648 csp->http->server_ssl = csp->http->ssl;
2651 csp->http->client_ssl = 1;
2653 freez(csp->https_headers->first->str);
2654 build_request_line(csp, NULL, &csp->https_headers->first->str);
2656 if (!server_use_ssl(csp))
2658 log_error(LOG_LEVEL_REDIRECTS,
2659 "Rewritten request line results in downgrade to http");
2661 * Replace the unencryptd headers received with the
2662 * CONNECT request with the ones we received securely.
2664 destroy_list(csp->headers);
2665 csp->headers->first = csp->https_headers->first;
2666 csp->headers->last = csp->https_headers->last;
2667 csp->https_headers->first = NULL;
2668 csp->https_headers->last = NULL;
2676 /*********************************************************************
2678 * Function : process_encrypted_request
2680 * Description : Receives and parses an encrypted request.
2683 * 1 : csp = Current client state (buffers, headers, etc...)
2685 * Returns : JB_ERR_OK on success,
2686 * JB_ERR_PARSE or JB_ERR_MEMORY otherwise
2688 *********************************************************************/
2689 static jb_err process_encrypted_request(struct client_state *csp)
2694 /* Temporary copy of the client's headers before they get enlisted in csp->https_headers */
2695 struct list header_list;
2696 struct list *headers = &header_list;
2698 assert(csp->ssl_with_client_is_opened);
2700 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2701 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
2703 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2706 err = receive_encrypted_request(csp);
2707 if (err != JB_ERR_OK)
2709 if (csp->client_iob->cur == NULL ||
2710 csp->client_iob->cur == csp->client_iob->eod)
2713 * We did not receive any data, most likely because the
2714 * client is done. Don't log this as a parse failure.
2716 return JB_ERR_PARSE;
2718 /* XXX: Also used for JB_ERR_MEMORY */
2719 log_error(LOG_LEVEL_ERROR, "Failed to receive encrypted request: %s",
2720 jb_err_to_string(err));
2721 ssl_send_data_delayed(&(csp->ssl_client_attr),
2722 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2726 /* We don't need get_request_line() because the whole HTTP head is buffered. */
2727 request_line = get_header(csp->client_iob);
2728 if (request_line == NULL)
2730 log_error(LOG_LEVEL_ERROR, "Failed to get the encrypted request line");
2731 ssl_send_data_delayed(&(csp->ssl_client_attr),
2732 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2733 return JB_ERR_PARSE;
2735 assert(*request_line != '\0');
2737 if (client_protocol_is_unsupported(csp, request_line))
2740 * If the protocol is unsupported we're done here.
2741 * client_protocol_is_unsupported() took care of sending
2742 * the error response and logging the error message.
2744 return JB_ERR_PARSE;
2747 #ifdef FEATURE_FORCE_LOAD
2748 if (force_required(csp, request_line))
2750 csp->flags |= CSP_FLAG_FORCED;
2752 #endif /* def FEATURE_FORCE_LOAD */
2754 free_http_request(csp->http);
2756 err = parse_http_request(request_line, csp->http);
2757 /* XXX: Restore ssl setting. This is ugly */
2758 csp->http->client_ssl = 1;
2759 csp->http->server_ssl = 1;
2761 freez(request_line);
2762 if (JB_ERR_OK != err)
2764 ssl_send_data_delayed(&(csp->ssl_client_attr),
2765 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2766 /* XXX: Use correct size */
2767 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2768 log_error(LOG_LEVEL_ERROR,
2769 "Couldn't parse request line received from %s: %s",
2770 csp->ip_addr_str, jb_err_to_string(err));
2772 free_http_request(csp->http);
2773 return JB_ERR_PARSE;
2776 /* Parse the rest of the client's headers. */
2780 p = get_header(csp->client_iob);
2784 /* There are no additional headers to read. */
2791 if (JB_ERR_OK != get_destination_from_https_headers(headers, csp->http))
2794 * Our attempts to get the request destination
2797 log_error(LOG_LEVEL_ERROR,
2798 "Failed to get the encrypted request destination");
2799 ssl_send_data_delayed(&(csp->ssl_client_attr),
2800 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2801 return JB_ERR_PARSE;
2804 /* Split the domain we just got for pattern matching */
2805 init_domain_components(csp->http);
2807 #ifdef FEATURE_CLIENT_TAGS
2808 /* XXX: If the headers were enlisted sooner, passing csp would do. */
2809 if (csp->client_address == NULL)
2811 set_client_address(csp, headers);
2812 get_tag_list_for_client(csp->client_tags, csp->client_address);
2816 #ifdef FEATURE_TOGGLE
2817 if ((csp->flags & CSP_FLAG_TOGGLED_ON) != 0)
2821 * Determine the actions for this request after
2822 * clearing the ones from the previous one.
2824 free_current_action(csp->action);
2825 get_url_actions(csp, csp->http);
2828 enlist(csp->https_headers, csp->http->cmd);
2830 /* Append the previously read headers */
2831 err = list_append_list_unique(csp->https_headers, headers);
2832 destroy_list(headers);
2833 if (JB_ERR_OK != err)
2835 /* XXX: Send error message */
2839 /* XXX: Work around crash */
2840 csp->error_message = NULL;
2842 /* XXX: Why do this here? */
2845 err = sed_https(csp);
2846 if (JB_ERR_OK != err)
2848 ssl_send_data_delayed(&(csp->ssl_client_attr),
2849 (const unsigned char *)CHEADER, strlen(CHEADER), get_write_delay(csp));
2850 log_error(LOG_LEVEL_ERROR, "Failed to parse client request from %s.",
2852 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
2853 csp->ip_addr_str, csp->http->cmd);
2854 return JB_ERR_PARSE;
2857 if ((NULL == csp->https_headers->first->str)
2858 || (strcmp(csp->http->cmd, csp->https_headers->first->str) &&
2859 (JB_ERR_OK != change_encrypted_request_destination(csp))))
2861 ssl_send_data_delayed(&(csp->ssl_client_attr),
2862 (const unsigned char *)MESSED_UP_REQUEST_RESPONSE,
2863 strlen(MESSED_UP_REQUEST_RESPONSE), get_write_delay(csp));
2864 log_error(LOG_LEVEL_ERROR,
2865 "Invalid request line after applying header filters.");
2866 /* XXX: Use correct size */
2867 log_error(LOG_LEVEL_CLF,
2868 "%s - - [%T] \"Invalid request generated\" 400 0", csp->ip_addr_str);
2870 return JB_ERR_PARSE;
2873 log_error(LOG_LEVEL_HEADER, "Encrypted request processed");
2874 log_applied_actions(csp->action);
2875 log_error(LOG_LEVEL_REQUEST, "https://%s%s", csp->http->hostport,
2882 /*********************************************************************
2884 * Function : cgi_page_requested
2886 * Description : Checks if a request is for an internal CGI page.
2889 * 1 : host = The host requested by the client.
2891 * Returns : 1 if a CGI page has been requested, 0 otherwise
2893 *********************************************************************/
2894 static int cgi_page_requested(const char *host)
2896 if ((0 == strcmpic(host, CGI_SITE_1_HOST))
2897 || (0 == strcmpic(host, CGI_SITE_1_HOST "."))
2898 || (0 == strcmpic(host, CGI_SITE_2_HOST))
2899 || (0 == strcmpic(host, CGI_SITE_2_HOST ".")))
2909 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2910 /*********************************************************************
2912 * Function : continue_https_chat
2914 * Description : Behaves similar to chat() but only deals with
2915 * https-inspected requests that arrive on an already
2916 * established connection. The first request is always
2917 * served by chat() which is a lot more complex as it
2918 * has to deal with forwarding settings and connection
2921 * If a connection to the server has already been
2922 * opened it is reused unless the request is blocked
2923 * or the forwarder changed.
2925 * If a connection to the server has not yet been
2926 * opened (because the previous request was crunched),
2927 * or the forwarder changed, the connection is dropped
2928 * so that the client retries on a fresh one.
2931 * 1 : csp = Current client state (buffers, headers, etc...)
2933 * Returns : Nothing.
2935 *********************************************************************/
2936 static void continue_https_chat(struct client_state *csp)
2938 const struct forward_spec *fwd;
2940 if (JB_ERR_OK != process_encrypted_request(csp))
2942 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2946 csp->requests_received_total++;
2949 * We have an encrypted request. Check if one of the crunchers wants it.
2951 if (crunch_response_triggered(csp, crunchers_all))
2954 * Yes. The client got the crunch response and we're done here.
2958 if (csp->ssl_with_server_is_opened == 0)
2960 log_error(LOG_LEVEL_CONNECT,
2961 "Dropping the client connection on socket %d. "
2962 "The server connection has not been established yet.",
2964 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2967 assert(csp->server_connection.sfd != JB_INVALID_SOCKET);
2969 fwd = forward_url(csp, csp->http);
2970 if (!connection_destination_matches(&csp->server_connection, csp->http, fwd))
2972 log_error(LOG_LEVEL_CONNECT,
2973 "Dropping the client connection on socket %d with "
2974 "server socket %d connected to %s. The forwarder has changed.",
2975 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
2976 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
2980 log_error(LOG_LEVEL_CONNECT,
2981 "Reusing server socket %d connected to %s. Requests already sent: %u.",
2982 csp->server_connection.sfd, csp->server_connection.host,
2983 csp->server_connection.requests_sent_total);
2985 if (send_https_request(csp))
2988 * Most likely the server connection timed out. We can't easily
2989 * create a new one so simply drop the client connection without a
2990 * error response to let the client retry.
2992 log_error(LOG_LEVEL_CONNECT,
2993 "Dropping client connection on socket %d. "
2994 "Forwarding the encrypted client request failed.",
2998 csp->server_connection.request_sent = time(NULL);
2999 csp->server_connection.requests_sent_total++;
3000 handle_established_connection(csp);
3001 freez(csp->receive_buffer);
3003 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3007 /*********************************************************************
3009 * Function : handle_established_connection
3011 * Description : Shuffle data between client and server once the
3012 * connection has been established and the request
3016 * 1 : csp = Current client state (buffers, headers, etc...)
3018 * Returns : Nothing.
3020 *********************************************************************/
3021 static void handle_established_connection(struct client_state *csp)
3027 struct pollfd poll_fds[2];
3031 struct timeval timeout;
3034 int ms_iis5_hack = 0;
3035 unsigned long long byte_count = 0;
3036 struct http_request *http;
3037 long len = 0; /* for buffer sizes (and negative error codes) */
3038 int buffer_and_filter_content = 0;
3039 unsigned int write_delay;
3040 #ifdef FEATURE_HTTPS_INSPECTION
3042 int use_ssl_tunnel = 0;
3043 csp->dont_verify_certificate = 0;
3045 if (csp->http->ssl && !(csp->action->flags & ACTION_HTTPS_INSPECTION))
3047 /* Pass encrypted content without filtering. */
3052 /* Skeleton for HTTP response, if we should intercept the request */
3053 struct http_response *rsp;
3054 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3055 int watch_client_socket;
3058 csp->receive_buffer_size = csp->config->receive_buffer_size;
3059 csp->receive_buffer = zalloc(csp->receive_buffer_size + 1);
3060 if (csp->receive_buffer == NULL)
3062 log_error(LOG_LEVEL_ERROR,
3063 "Out of memory. Failed to allocate the receive buffer.");
3064 rsp = cgi_error_memory();
3065 send_crunch_response(csp, rsp);
3072 maxfd = (csp->cfd > csp->server_connection.sfd) ?
3073 csp->cfd : csp->server_connection.sfd;
3076 /* pass data between the client and server
3077 * until one or the other shuts down the connection.
3082 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3083 watch_client_socket = 0 == (csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING);
3085 write_delay = get_write_delay(csp);
3089 #ifdef FEATURE_HTTPS_INSPECTION
3090 if (server_use_ssl(csp) && is_ssl_pending(&(csp->ssl_server_attr)))
3093 * It's possible that the TLS library already consumed all the
3094 * data the server intends to send. If that happens poll() and
3095 * select() will no longer see the data as available so we have
3096 * to skip the calls.
3098 goto server_wants_to_talk;
3103 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3104 if (!watch_client_socket)
3106 maxfd = csp->server_connection.sfd;
3109 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3111 FD_SET(csp->cfd, &rfds);
3114 FD_SET(csp->server_connection.sfd, &rfds);
3115 #endif /* ndef HAVE_POLL */
3117 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3118 if ((csp->flags & CSP_FLAG_CHUNKED)
3119 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3120 && ((csp->iob->eod - csp->iob->cur) >= 5)
3121 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
3124 * XXX: This check should be obsolete now,
3125 * but let's wait a while to be sure.
3127 log_error(LOG_LEVEL_CONNECT,
3128 "Looks like we got the last chunk together with "
3129 "the server headers but didn't detect it earlier. "
3130 "We better stop reading.");
3131 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
3132 csp->expected_content_length = byte_count;
3133 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
3135 if (server_body && server_response_is_complete(csp, byte_count))
3137 if (csp->expected_content_length == byte_count)
3139 log_error(LOG_LEVEL_CONNECT,
3140 "Done reading from server. Content length: %llu as expected. "
3141 "Bytes most recently read: %ld.",
3146 log_error(LOG_LEVEL_CONNECT,
3147 "Done reading from server. Expected content length: %llu. "
3148 "Actual content length: %llu. Bytes most recently read: %ld.",
3149 csp->expected_content_length, byte_count, len);
3153 * XXX: Should not jump around, handle_established_connection()
3154 * is complicated enough already.
3158 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
3161 poll_fds[0].fd = csp->cfd;
3162 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3163 if (!watch_client_socket)
3166 * Ignore incoming data, but still watch out
3167 * for disconnects etc. These flags are always
3168 * implied anyway but explicitly setting them
3171 poll_fds[0].events = POLLERR|POLLHUP;
3176 poll_fds[0].events = POLLIN;
3178 poll_fds[1].fd = csp->server_connection.sfd;
3179 poll_fds[1].events = POLLIN;
3180 n = poll(poll_fds, 2, csp->config->socket_timeout * 1000);
3182 timeout.tv_sec = csp->config->socket_timeout;
3183 timeout.tv_usec = 0;
3184 n = select((int)maxfd + 1, &rfds, NULL, NULL, &timeout);
3185 #endif /* def HAVE_POLL */
3187 /* Server or client not responding in timeout */
3190 log_error(LOG_LEVEL_CONNECT, "Socket timeout %d reached: %s",
3191 csp->config->socket_timeout, http->url);
3192 if ((byte_count == 0) && (http->ssl == 0))
3194 send_crunch_response(csp, error_response(csp, "connection-timeout"));
3196 mark_server_socket_tainted(csp);
3197 #ifdef FEATURE_HTTPS_INSPECTION
3198 close_client_and_server_ssl_connections(csp);
3205 log_error(LOG_LEVEL_ERROR, "poll() failed!: %E");
3207 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
3209 mark_server_socket_tainted(csp);
3210 #ifdef FEATURE_HTTPS_INSPECTION
3211 close_client_and_server_ssl_connections(csp);
3217 * This is the body of the browser's request,
3218 * just read and write it.
3220 * Receives data from browser and sends it to server
3222 * XXX: Make sure the client doesn't use pipelining
3223 * behind Privoxy's back.
3226 if ((poll_fds[0].revents & (POLLERR|POLLHUP|POLLNVAL)) != 0)
3228 log_error(LOG_LEVEL_CONNECT,
3229 "The client socket %d has become unusable while "
3230 "the server socket %d is still open.",
3231 csp->cfd, csp->server_connection.sfd);
3232 mark_server_socket_tainted(csp);
3236 if (poll_fds[0].revents != 0)
3238 if (FD_ISSET(csp->cfd, &rfds))
3239 #endif /* def HAVE_POLL*/
3241 int max_bytes_to_read = (int)csp->receive_buffer_size;
3243 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3244 if ((csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
3246 if (data_is_available(csp->cfd, 0))
3249 * If the next request is already waiting, we have
3250 * to stop select()ing the client socket. Otherwise
3251 * we would always return right away and get nothing
3254 watch_client_socket = 0;
3255 log_error(LOG_LEVEL_CONNECT,
3256 "Stop watching client socket %d. "
3257 "There's already another request waiting.",
3262 * If the client socket is set, but there's no data
3263 * available on the socket, the client went fishing
3264 * and continuing talking to the server makes no sense.
3266 log_error(LOG_LEVEL_CONNECT,
3267 "The client closed socket %d while "
3268 "the server socket %d is still open.",
3269 csp->cfd, csp->server_connection.sfd);
3270 mark_server_socket_tainted(csp);
3273 if (csp->expected_client_content_length != 0)
3275 if (csp->expected_client_content_length < csp->receive_buffer_size)
3277 max_bytes_to_read = (int)csp->expected_client_content_length;
3279 log_error(LOG_LEVEL_CONNECT,
3280 "Waiting for up to %d bytes from the client.",
3283 assert(max_bytes_to_read <= csp->receive_buffer_size);
3284 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3286 #ifdef FEATURE_HTTPS_INSPECTION
3287 if (client_use_ssl(csp))
3289 if (csp->http->status == 101)
3291 len = ssl_recv_data(&(csp->ssl_client_attr),
3292 (unsigned char *)csp->receive_buffer,
3293 (size_t)max_bytes_to_read);
3296 log_error(LOG_LEVEL_ERROR, "Failed to receive data "
3297 "on client socket %d for an upgraded connection",
3303 log_error(LOG_LEVEL_CONNECT, "Done receiving data "
3304 "on client socket %d for an upgraded connection",
3308 byte_count += (unsigned long long)len;
3309 len = ssl_send_data(&(csp->ssl_server_attr),
3310 (unsigned char *)csp->receive_buffer, (size_t)len);
3313 log_error(LOG_LEVEL_ERROR, "Failed to send data "
3314 "on server socket %d for an upgraded connection",
3315 csp->server_connection.sfd);
3320 log_error(LOG_LEVEL_CONNECT, "Breaking with TLS/SSL.");
3324 #endif /* def FEATURE_HTTPS_INSPECTION */
3326 len = read_socket(csp->cfd, csp->receive_buffer, max_bytes_to_read);
3330 /* XXX: not sure if this is necessary. */
3331 mark_server_socket_tainted(csp);
3332 break; /* "game over, man" */
3335 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3336 if (csp->expected_client_content_length != 0)
3338 assert(len <= max_bytes_to_read);
3339 csp->expected_client_content_length -= (unsigned)len;
3340 log_error(LOG_LEVEL_CONNECT,
3341 "Expected client content length set to %llu "
3342 "after reading %ld bytes.",
3343 csp->expected_client_content_length, len);
3344 if (csp->expected_client_content_length == 0)
3346 log_error(LOG_LEVEL_CONNECT,
3347 "Done reading from the client.");
3348 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
3351 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3353 if (write_socket(csp->server_connection.sfd, csp->receive_buffer, (size_t)len))
3355 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
3356 mark_server_socket_tainted(csp);
3364 * The server wants to talk. It could be the header or the body.
3365 * If `hdr' is null, then it's the header otherwise it's the body.
3366 * FIXME: Does `hdr' really mean `host'? No.
3369 if (poll_fds[1].revents != 0)
3371 if (FD_ISSET(csp->server_connection.sfd, &rfds))
3372 #endif /* HAVE_POLL */
3374 #ifdef FEATURE_HTTPS_INSPECTION
3375 server_wants_to_talk:
3377 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3379 * If we are buffering content, we don't want to eat up to
3380 * buffer-limit bytes if the client no longer cares about them.
3381 * If we aren't buffering, however, a dead client socket will be
3382 * noticed pretty much right away anyway, so we can reduce the
3383 * overhead by skipping the check.
3385 if (buffer_and_filter_content && !socket_is_still_alive(csp->cfd))
3388 log_error(LOG_LEVEL_CONNECT,
3389 "The server still wants to talk, but the client may already have hung up on us.");
3391 log_error(LOG_LEVEL_CONNECT,
3392 "The server still wants to talk, but the client hung up on us.");
3393 mark_server_socket_tainted(csp);
3394 #ifdef FEATURE_HTTPS_INSPECTION
3395 close_client_and_server_ssl_connections(csp);
3398 #endif /* def _WIN32 */
3400 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3402 #ifdef FEATURE_HTTPS_INSPECTION
3404 * Reading data from standard or secured connection (HTTP/HTTPS)
3406 if (server_use_ssl(csp))
3408 len = ssl_recv_data(&(csp->ssl_server_attr),
3409 (unsigned char *)csp->receive_buffer, csp->receive_buffer_size);
3414 len = read_socket(csp->server_connection.sfd, csp->receive_buffer,
3415 (int)csp->receive_buffer_size);
3420 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
3422 if ((http->ssl && (csp->fwd == NULL))
3423 #ifdef FEATURE_HTTPS_INSPECTION
3429 * Just hang up. We already confirmed the client's CONNECT
3430 * request with status code 200 and unencrypted content is
3431 * no longer welcome.
3433 log_error(LOG_LEVEL_ERROR,
3434 "CONNECT already confirmed. Unable to tell the client about the problem.");
3437 else if (byte_count)
3440 * Just hang up. We already transmitted the original headers
3441 * and parts of the original content and therefore missed the
3442 * chance to send an error message (without risking data corruption).
3444 * XXX: we could retry with a fancy range request here.
3446 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
3447 "Unable to tell the client about the problem.");
3448 mark_server_socket_tainted(csp);
3449 #ifdef FEATURE_HTTPS_INSPECTION
3450 close_client_and_server_ssl_connections(csp);
3455 * XXX: Consider handling the cases above the same.
3457 mark_server_socket_tainted(csp);
3461 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3462 if (csp->flags & CSP_FLAG_CHUNKED)
3464 if ((len >= 5) && !memcmp(csp->receive_buffer+len-5, "0\r\n\r\n", 5))
3466 /* XXX: this is a temporary hack */
3467 log_error(LOG_LEVEL_CONNECT,
3468 "Looks like we reached the end of the last chunk. "
3469 "We better stop reading.");
3470 csp->expected_content_length = byte_count + (unsigned long long)len;
3471 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
3475 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
3478 * This is guaranteed by allocating with zalloc_or_die()
3479 * and never (intentionally) writing to the last byte.
3481 * csp->receive_buffer_size is the size of the part of the
3482 * buffer we intentionally write to, but we actually
3483 * allocated csp->receive_buffer_size+1 bytes so the assertion
3484 * stays within the allocated range.
3486 assert(csp->receive_buffer[csp->receive_buffer_size] == '\0');
3489 * Add a trailing zero to let be able to use string operations.
3490 * XXX: do we still need this with filter_popups gone?
3492 assert(len <= csp->receive_buffer_size);
3493 csp->receive_buffer[len] = '\0';
3496 * Normally, this would indicate that we've read
3497 * as much as the server has sent us and we can
3498 * close the client connection. However, Microsoft
3499 * in its wisdom has released IIS/5 with a bug that
3500 * prevents it from sending the trailing \r\n in
3501 * a 302 redirect header (and possibly other headers).
3502 * To work around this if we've haven't parsed
3503 * a full header we'll append a trailing \r\n
3504 * and see if this now generates a valid one.
3506 * This hack shouldn't have any impacts. If we've
3507 * already transmitted the header or if this is a
3508 * SSL connection, then we won't bother with this
3509 * hack. So we only work on partially received
3510 * headers. If we append a \r\n and this still
3511 * doesn't generate a valid header, then we won't
3512 * transmit anything to the client.
3517 if (server_body || (http->ssl
3518 #ifdef FEATURE_HTTPS_INSPECTION
3524 * If we have been buffering up the document,
3525 * now is the time to apply content modification
3526 * and send the result to the client.
3528 if (buffer_and_filter_content)
3530 p = execute_content_filters(csp);
3532 * If content filtering fails, use the original
3533 * buffer and length.
3534 * (see p != NULL ? p : csp->iob->cur below)
3538 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
3540 #ifdef FEATURE_COMPRESSION
3541 else if ((csp->flags & CSP_FLAG_CLIENT_SUPPORTS_DEFLATE)
3542 && (csp->content_length > LOWER_LENGTH_LIMIT_FOR_COMPRESSION))
3544 char *compressed_content = compress_buffer(p,
3545 (size_t *)&csp->content_length, csp->config->compression_level);
3546 if (compressed_content != NULL)
3549 p = compressed_content;
3550 csp->flags |= CSP_FLAG_BUFFERED_CONTENT_DEFLATED;
3555 if (JB_ERR_OK != update_server_headers(csp))
3557 log_error(LOG_LEVEL_FATAL,
3558 "Failed to update server headers. after filtering.");
3561 hdr = list_to_text(csp->headers);
3564 /* FIXME Should handle error properly */
3565 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3568 #ifdef FEATURE_HTTPS_INSPECTION
3570 * Sending data with standard or secured connection (HTTP/HTTPS)
3572 if (client_use_ssl(csp))
3574 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
3575 (const unsigned char *)hdr, strlen(hdr),
3576 get_write_delay(csp)) < 0)
3577 || (ssl_send_data_delayed(&(csp->ssl_client_attr),
3578 (const unsigned char *) ((p != NULL) ? p : csp->iob->cur),
3579 csp->content_length, get_write_delay(csp)) < 0))
3581 log_error(LOG_LEVEL_ERROR,
3582 "Failed to send the modified content to the client over TLS");
3585 mark_server_socket_tainted(csp);
3586 close_client_and_server_ssl_connections(csp);
3591 #endif /* def FEATURE_HTTPS_INSPECTION */
3593 if (write_socket_delayed(csp->cfd, hdr, strlen(hdr), write_delay)
3594 || write_socket_delayed(csp->cfd, ((p != NULL) ? p : csp->iob->cur),
3595 (size_t)csp->content_length, write_delay))
3597 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
3600 mark_server_socket_tainted(csp);
3609 break; /* "game over, man" */
3613 * This is not the body, so let's pretend the server just sent
3616 snprintf(csp->receive_buffer, csp->receive_buffer_size, "\r\n");
3617 len = (int)strlen(csp->receive_buffer);
3620 * Now, let the normal header parsing algorithm below do its
3621 * job. If it fails, we'll exit instead of continuing.
3628 * If we're in the body of the server document, just write it to
3629 * the client, unless we need to buffer the body for later
3630 * content-filtering.
3632 if (server_body || (http->ssl
3633 #ifdef FEATURE_HTTPS_INSPECTION
3638 if (buffer_and_filter_content)
3641 * If there is no memory left for buffering the content, or the buffer limit
3642 * has been reached, switch to non-filtering mode, i.e. make & write the
3643 * header, flush the iob and buf, and get out of the way.
3645 if (add_to_iob(csp->iob, csp->config->buffer_limit, csp->receive_buffer, len))
3650 log_error(LOG_LEVEL_INFO,
3651 "Flushing header and buffers. Stepping back from filtering.");
3653 hdr = list_to_text(csp->headers);
3657 * Memory is too tight to even generate the header.
3658 * Send our static "Out-of-memory" page.
3660 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
3661 rsp = cgi_error_memory();
3662 send_crunch_response(csp, rsp);
3663 mark_server_socket_tainted(csp);
3664 #ifdef FEATURE_HTTPS_INSPECTION
3665 close_client_and_server_ssl_connections(csp);
3669 hdrlen = strlen(hdr);
3671 #ifdef FEATURE_HTTPS_INSPECTION
3673 * Sending data with standard or secured connection (HTTP/HTTPS)
3675 if (client_use_ssl(csp))
3677 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
3678 (const unsigned char *)hdr, hdrlen, get_write_delay(csp)) < 0)
3679 || ((flushed = ssl_flush_socket(&(csp->ssl_client_attr),
3681 || (ssl_send_data_delayed(&(csp->ssl_client_attr),
3682 (const unsigned char *)csp->receive_buffer, (size_t)len,
3683 get_write_delay(csp)) < 0))
3685 log_error(LOG_LEVEL_CONNECT,
3686 "Flush header and buffers to client failed");
3688 mark_server_socket_tainted(csp);
3689 close_client_and_server_ssl_connections(csp);
3694 #endif /* def FEATURE_HTTPS_INSPECTION */
3696 if (write_socket_delayed(csp->cfd, hdr, hdrlen, write_delay)
3697 || ((flushed = flush_iob(csp->cfd, csp->iob, write_delay)) < 0)
3698 || write_socket_delayed(csp->cfd, csp->receive_buffer, (size_t)len,
3701 log_error(LOG_LEVEL_CONNECT,
3702 "Flush header and buffers to client failed: %E");
3704 mark_server_socket_tainted(csp);
3710 * Reset the byte_count to the amount of bytes
3711 * we just flushed. len will be added a few lines below,
3712 * hdrlen doesn't matter for LOG_LEVEL_CLF.
3714 byte_count = (unsigned long long)flushed;
3716 buffer_and_filter_content = 0;
3722 #ifdef FEATURE_HTTPS_INSPECTION
3724 * Sending data with standard or secured connection (HTTP/HTTPS)
3726 if (client_use_ssl(csp))
3728 ret = ssl_send_data_delayed(&(csp->ssl_client_attr),
3729 (const unsigned char *)csp->receive_buffer, (size_t)len,
3730 get_write_delay(csp));
3733 log_error(LOG_LEVEL_ERROR,
3734 "Sending data to client failed");
3735 mark_server_socket_tainted(csp);
3736 close_client_and_server_ssl_connections(csp);
3741 #endif /* def FEATURE_HTTPS_INSPECTION */
3743 if (write_socket_delayed(csp->cfd, csp->receive_buffer,
3744 (size_t)len, write_delay))
3746 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
3747 mark_server_socket_tainted(csp);
3752 byte_count += (unsigned long long)len;
3758 * We're still looking for the end of the server's header.
3759 * Buffer up the data we just read. If that fails, there's
3760 * little we can do but send our static out-of-memory page.
3762 if (add_to_iob(csp->iob, csp->config->buffer_limit, csp->receive_buffer, len))
3764 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
3765 rsp = cgi_error_memory();
3766 send_crunch_response(csp, rsp);
3767 mark_server_socket_tainted(csp);
3768 #ifdef FEATURE_HTTPS_INSPECTION
3769 close_client_and_server_ssl_connections(csp);
3774 /* Convert iob into something sed() can digest */
3775 if (JB_ERR_PARSE == get_server_headers(csp))
3780 * Well, we tried our MS IIS/5 hack and it didn't work.
3781 * The header is incomplete and there isn't anything
3782 * we can do about it.
3784 log_error(LOG_LEVEL_ERROR, "Invalid server headers. "
3785 "Applying the MS IIS5 hack didn't help.");
3786 log_error(LOG_LEVEL_CLF,
3787 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3788 #ifdef FEATURE_HTTPS_INSPECTION
3790 * Sending data with standard or secured connection (HTTP/HTTPS)
3792 if (client_use_ssl(csp))
3794 ssl_send_data_delayed(&(csp->ssl_client_attr),
3795 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3796 strlen(INVALID_SERVER_HEADERS_RESPONSE), get_write_delay(csp));
3799 #endif /* def FEATURE_HTTPS_INSPECTION */
3801 write_socket_delayed(csp->cfd,
3802 INVALID_SERVER_HEADERS_RESPONSE,
3803 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
3805 mark_server_socket_tainted(csp);
3806 #ifdef FEATURE_HTTPS_INSPECTION
3807 close_client_and_server_ssl_connections(csp);
3814 * Since we have to wait for more from the server before
3815 * we can parse the headers we just continue here.
3817 log_error(LOG_LEVEL_CONNECT,
3818 "Continuing buffering server headers from socket %d. "
3819 "Bytes most recently read: %ld.", csp->cfd, len);
3826 * Account for the content bytes we
3827 * might have gotten with the headers.
3829 assert(csp->iob->eod >= csp->iob->cur);
3830 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
3833 /* Did we actually get anything? */
3834 if (NULL == csp->headers->first)
3836 if ((csp->flags & CSP_FLAG_REUSED_CLIENT_CONNECTION))
3838 log_error(LOG_LEVEL_ERROR,
3839 "No server or forwarder response received on socket %d. "
3840 "Closing client socket %d without sending data.",
3841 csp->server_connection.sfd, csp->cfd);
3842 log_error(LOG_LEVEL_CLF,
3843 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3847 log_error(LOG_LEVEL_ERROR,
3848 "No server or forwarder response received on socket %d.",
3849 csp->server_connection.sfd);
3850 send_crunch_response(csp, error_response(csp, "no-server-data"));
3852 free_http_request(http);
3853 mark_server_socket_tainted(csp);
3854 #ifdef FEATURE_HTTPS_INSPECTION
3855 close_client_and_server_ssl_connections(csp);
3860 if (!csp->headers->first->str)
3862 log_error(LOG_LEVEL_ERROR, "header search: csp->headers->first->str == NULL, assert will be called");
3864 assert(csp->headers->first->str);
3866 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3867 strncmpic(csp->headers->first->str, "ICY", 3))
3870 * It doesn't look like a HTTP (or Shoutcast) response:
3871 * tell the client and log the problem.
3873 if (strlen(csp->headers->first->str) > 30)
3875 csp->headers->first->str[30] = '\0';
3877 log_error(LOG_LEVEL_ERROR,
3878 "Invalid server or forwarder response. Starts with: %s",
3879 csp->headers->first->str);
3880 log_error(LOG_LEVEL_CLF,
3881 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3882 #ifdef FEATURE_HTTPS_INSPECTION
3884 * Sending data with standard or secured connection (HTTP/HTTPS)
3886 if (client_use_ssl(csp))
3888 ssl_send_data_delayed(&(csp->ssl_client_attr),
3889 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3890 strlen(INVALID_SERVER_HEADERS_RESPONSE),
3891 get_write_delay(csp));
3894 #endif /* def FEATURE_HTTPS_INSPECTION */
3896 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3897 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
3899 free_http_request(http);
3900 mark_server_socket_tainted(csp);
3901 #ifdef FEATURE_HTTPS_INSPECTION
3902 close_client_and_server_ssl_connections(csp);
3908 * Disable redirect checkers, so that they will be only run
3909 * again if the user also enables them through tags.
3911 * From a performance point of view it doesn't matter,
3912 * but it prevents duplicated log messages.
3914 #ifdef FEATURE_FAST_REDIRECTS
3915 csp->action->flags &= ~ACTION_FAST_REDIRECTS;
3917 csp->action->flags &= ~ACTION_REDIRECT;
3920 * We have now received the entire server header,
3921 * filter it and send the result to the client
3923 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3925 log_error(LOG_LEVEL_CLF,
3926 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3927 #ifdef FEATURE_HTTPS_INSPECTION
3929 * Sending data with standard or secured connection (HTTP/HTTPS)
3931 if (client_use_ssl(csp))
3933 ssl_send_data_delayed(&(csp->ssl_client_attr),
3934 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
3935 strlen(INVALID_SERVER_HEADERS_RESPONSE),
3936 get_write_delay(csp));
3941 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3942 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
3944 free_http_request(http);
3945 mark_server_socket_tainted(csp);
3946 #ifdef FEATURE_HTTPS_INSPECTION
3947 close_client_and_server_ssl_connections(csp);
3951 hdr = list_to_text(csp->headers);
3954 /* FIXME Should handle error properly */
3955 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3958 if ((csp->flags & CSP_FLAG_CHUNKED)
3959 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3960 && ((csp->iob->eod - csp->iob->cur) >= 5)
3961 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
3963 log_error(LOG_LEVEL_CONNECT,
3964 "Looks like we got the last chunk together with "
3965 "the server headers. We better stop reading.");
3966 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
3967 csp->expected_content_length = byte_count;
3968 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
3971 csp->server_connection.response_received = time(NULL);
3973 if (crunch_response_triggered(csp, crunchers_light))
3976 * One of the tags created by a server-header
3977 * tagger triggered a crunch. We already
3978 * delivered the crunch response to the client
3979 * and are done here after cleaning up.
3982 mark_server_socket_tainted(csp);
3983 #ifdef FEATURE_HTTPS_INSPECTION
3984 close_client_and_server_ssl_connections(csp);
3989 /* Buffer and pcrs filter this if appropriate. */
3990 buffer_and_filter_content = content_requires_filtering(csp);
3992 if (!buffer_and_filter_content)
3995 * Write the server's (modified) header to
3996 * the client (along with anything else that
3997 * may be in the buffer). Use standard or secured
4000 #ifdef FEATURE_HTTPS_INSPECTION
4001 if (client_use_ssl(csp))
4003 if ((ssl_send_data_delayed(&(csp->ssl_client_attr),
4004 (const unsigned char *)hdr, strlen(hdr),
4005 get_write_delay(csp)) < 0)
4006 || ((len = ssl_flush_socket(&(csp->ssl_client_attr),
4009 log_error(LOG_LEVEL_CONNECT, "Write header to client failed");
4012 * The write failed, so don't bother mentioning it
4013 * to the client... it probably can't hear us anyway.
4016 mark_server_socket_tainted(csp);
4017 #ifdef FEATURE_HTTPS_INSPECTION
4018 close_client_and_server_ssl_connections(csp);
4024 #endif /* def FEATURE_HTTPS_INSPECTION */
4026 if (write_socket_delayed(csp->cfd, hdr, strlen(hdr), write_delay)
4027 || ((len = flush_iob(csp->cfd, csp->iob, write_delay)) < 0))
4029 log_error(LOG_LEVEL_ERROR,
4030 "write header to client failed");
4032 * The write failed, so don't bother mentioning it
4033 * to the client... it probably can't hear us anyway.
4036 mark_server_socket_tainted(csp);
4042 /* we're finished with the server's header */
4048 * If this was a MS IIS/5 hack then it means the server
4049 * has already closed the connection. Nothing more to read.
4054 log_error(LOG_LEVEL_ERROR,
4055 "Closed server connection detected. "
4056 "Applying the MS IIS5 hack didn't help.");
4057 log_error(LOG_LEVEL_CLF,
4058 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
4059 #ifdef FEATURE_HTTPS_INSPECTION
4061 * Sending data with standard or secured connection (HTTP/HTTPS)
4063 if (client_use_ssl(csp))
4065 ssl_send_data_delayed(&(csp->ssl_client_attr),
4066 (const unsigned char *)INVALID_SERVER_HEADERS_RESPONSE,
4067 strlen(INVALID_SERVER_HEADERS_RESPONSE),
4068 get_write_delay(csp));
4071 #endif /* def FEATURE_HTTPS_INSPECTION */
4073 write_socket_delayed(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
4074 strlen(INVALID_SERVER_HEADERS_RESPONSE), write_delay);
4076 mark_server_socket_tainted(csp);
4077 #ifdef FEATURE_HTTPS_INSPECTION
4078 close_client_and_server_ssl_connections(csp);
4085 mark_server_socket_tainted(csp);
4086 #ifdef FEATURE_HTTPS_INSPECTION
4087 close_client_and_server_ssl_connections(csp);
4089 return; /* huh? we should never get here */
4092 if (csp->content_length == 0)
4095 * If Privoxy didn't recalculate the Content-Length,
4096 * byte_count is still correct.
4098 csp->content_length = byte_count;
4101 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4102 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
4103 && (csp->expected_content_length != byte_count))
4105 log_error(LOG_LEVEL_CONNECT,
4106 "Received %llu bytes while expecting %llu.",
4107 byte_count, csp->expected_content_length);
4108 mark_server_socket_tainted(csp);
4112 #ifdef FEATURE_HTTPS_INSPECTION
4113 if (client_use_ssl(csp))
4115 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s https://%s%s %s\" 200 %llu",
4116 csp->ip_addr_str, http->gpc, http->hostport, http->path,
4117 http->version, csp->content_length);
4122 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
4123 csp->ip_addr_str, http->ocmd, csp->content_length);
4125 csp->server_connection.timestamp = time(NULL);
4129 /*********************************************************************
4133 * Description : Once a connection from the client has been accepted,
4134 * this function is called (via serve()) to handle the
4135 * main business of the communication. This function
4136 * returns after dealing with a single request. It can
4137 * be called multiple times with the same client socket
4138 * if the client is keeping the connection alive.
4140 * The decision whether or not a client connection will
4141 * be kept alive is up to the caller which also must
4142 * close the client socket when done.
4144 * FIXME: chat is nearly thousand lines long.
4148 * 1 : csp = Current client state (buffers, headers, etc...)
4150 * Returns : Nothing.
4152 *********************************************************************/
4153 static void chat(struct client_state *csp)
4155 const struct forward_spec *fwd;
4156 struct http_request *http;
4157 /* Skeleton for HTTP response, if we should intercept the request */
4158 struct http_response *rsp;
4159 #ifdef FEATURE_HTTPS_INSPECTION
4160 int use_ssl_tunnel = 0;
4165 if (receive_client_request(csp) != JB_ERR_OK)
4169 if (parse_client_request(csp) != JB_ERR_OK)
4174 #ifdef FEATURE_HTTPS_INSPECTION
4176 * Setting flags to use old solution with SSL tunnel and to disable
4177 * certificate verification.
4179 if (csp->http->ssl && !(csp->action->flags & ACTION_HTTPS_INSPECTION)
4180 && !cgi_page_requested(csp->http->host))
4185 if (http->ssl && (csp->action->flags & ACTION_IGNORE_CERTIFICATE_ERRORS))
4187 csp->dont_verify_certificate = 1;
4192 * build the http request to send to the server
4193 * we have to do one of the following:
4195 * create = use the original HTTP request to create a new
4196 * HTTP request that has either the path component
4197 * without the http://domainspec (w/path) or the
4198 * full orininal URL (w/url)
4199 * Note that the path and/or the HTTP version may
4200 * have been altered by now.
4202 * SSL proxy = Open a socket to the host:port of the server
4203 * and create TLS/SSL connection with server and
4204 * with client. Then behave like mediator between
4205 * client and server over TLS/SSL.
4207 * SSL proxy = Pass the request unchanged if forwarding a CONNECT
4208 * with request to a parent proxy. Note that we'll be sending
4209 * forwarding the CFAIL message ourselves if connecting to the parent
4210 * fails, but we won't send a CSUCCEED message if it works,
4211 * since that would result in a double message (ours and the
4212 * parent's). After sending the request to the parent, we
4213 * must parse answer and send it to client. If connection
4214 * with server is established, we do TLS/SSL proxy. Otherwise
4215 * we send parent response to client and close connections.
4217 * here's the matrix:
4220 * +--------+--------+
4222 * 0 | create | SSL |
4223 * | w/path | proxy |
4224 * Forwarding +--------+--------+
4226 * 1 | create | proxy |
4227 * | w/url |+forward|
4228 * +--------+--------+
4232 #ifdef FEATURE_HTTPS_INSPECTION
4234 * Presetting SSL client and server flags
4236 if (http->ssl && !use_ssl_tunnel)
4238 http->client_ssl = 1;
4239 http->server_ssl = 1;
4243 http->client_ssl = 0;
4244 http->server_ssl = 0;
4248 #ifdef FEATURE_HTTPS_INSPECTION
4250 * Log the request unless we're https inspecting
4251 * in which case we don't have the path yet and
4252 * will log the request later.
4254 if (!client_use_ssl(csp))
4257 log_error(LOG_LEVEL_REQUEST, "%s%s", http->hostport, http->path);
4260 if (http->ssl && connect_port_is_forbidden(csp))
4262 const char *acceptable_connect_ports =
4263 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
4264 assert(NULL != acceptable_connect_ports);
4265 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
4266 "limit-connect{%s} doesn't allow CONNECT requests to %s",
4267 csp->ip_addr_str, acceptable_connect_ports, csp->http->hostport);
4268 csp->action->flags |= ACTION_BLOCK;
4270 #ifdef FEATURE_HTTPS_INSPECTION
4271 http->client_ssl = 0;
4272 http->server_ssl = 0;
4277 * We have a request. Check if one of the crunchers wants it
4278 * unless the client wants to use TLS/SSL in which case we
4279 * haven't setup the TLS context yet and will send the crunch
4283 #ifdef FEATURE_HTTPS_INSPECTION
4284 !client_use_ssl(csp) &&
4286 crunch_response_triggered(csp, crunchers_all))
4289 * Yes. The client got the crunch response and we're done here.
4294 #ifdef FEATURE_HTTPS_INSPECTION
4295 if (client_use_ssl(csp) && !use_ssl_tunnel)
4299 * Creating a SSL proxy.
4301 * By sending the CSUCCEED message we're lying to the client as
4302 * the connection hasn't actually been established yet. We don't
4303 * establish the connection until we have seen and parsed the
4304 * encrypted client headers.
4306 if (write_socket_delayed(csp->cfd, CSUCCEED,
4307 strlen(CSUCCEED), get_write_delay(csp)) != 0)
4309 log_error(LOG_LEVEL_ERROR, "Sending SUCCEED to client failed");
4313 ret = create_client_ssl_connection(csp);
4316 log_error(LOG_LEVEL_ERROR,
4317 "Failed to open a secure connection with the client");
4320 if (JB_ERR_OK != process_encrypted_request(csp))
4322 close_client_ssl_connection(csp);
4326 * We have an encrypted request. Check if one of the crunchers now
4327 * wants it (for example because the previously invisible path was
4328 * required to match).
4330 if (crunch_response_triggered(csp, crunchers_all))
4333 * Yes. The client got the crunch response and we're done here.
4340 /* decide how to route the HTTP request */
4341 fwd = forward_url(csp, http);
4343 freez(csp->headers->first->str);
4344 build_request_line(csp, fwd, &csp->headers->first->str);
4346 log_applied_actions(csp->action);
4347 if (fwd->forward_host)
4349 log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
4350 fwd->forward_host, fwd->forward_port, http->hostport);
4354 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
4357 /* here we connect to the server, gateway, or the forwarder */
4359 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4360 if ((csp->server_connection.sfd != JB_INVALID_SOCKET)
4361 && socket_is_still_alive(csp->server_connection.sfd)
4362 && connection_destination_matches(&csp->server_connection, http, fwd))
4364 log_error(LOG_LEVEL_CONNECT,
4365 "Reusing server socket %d connected to %s. Total requests: %u.",
4366 csp->server_connection.sfd, csp->server_connection.host,
4367 csp->server_connection.requests_sent_total);
4371 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
4373 #ifdef FEATURE_CONNECTION_SHARING
4374 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING
4375 #ifdef FEATURE_HTTPS_INSPECTION
4376 && !server_use_ssl(csp)
4380 remember_connection(&csp->server_connection);
4383 #endif /* def FEATURE_CONNECTION_SHARING */
4385 log_error(LOG_LEVEL_CONNECT,
4386 "Closing server socket %d connected to %s. Total requests: %u.",
4387 csp->server_connection.sfd, csp->server_connection.host,
4388 csp->server_connection.requests_sent_total);
4389 close_socket(csp->server_connection.sfd);
4391 mark_connection_closed(&csp->server_connection);
4393 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4396 * Connecting to destination server
4398 csp->server_connection.sfd = forwarded_connect(fwd, http, csp);
4400 if (csp->server_connection.sfd == JB_INVALID_SOCKET)
4402 if (fwd->type != SOCKS_NONE)
4405 rsp = error_response(csp, "forwarding-failed");
4407 else if (errno == EINVAL)
4409 rsp = error_response(csp, "no-such-domain");
4413 rsp = error_response(csp, "connect-failed");
4416 /* Write the answer to the client */
4419 send_crunch_response(csp, rsp);
4423 * Temporary workaround to prevent already-read client
4424 * bodies from being parsed as new requests. For now we
4425 * err on the safe side and throw all the following
4426 * requests under the bus, even if no client body has been
4427 * buffered. A compliant client will repeat the dropped
4428 * requests on an untainted connection.
4430 * The proper fix is to discard the no longer needed
4431 * client body in the buffer (if there is one) and to
4432 * continue parsing the bytes that follow.
4434 #ifdef FEATURE_HTTPS_INSPECTION
4435 close_client_ssl_connection(csp);
4437 drain_and_close_socket(csp->cfd);
4438 csp->cfd = JB_INVALID_SOCKET;
4443 #ifdef FEATURE_HTTPS_INSPECTION
4445 * Creating TLS/SSL connections with destination server or parent
4446 * proxy. If forwarding is enabled, we must send client request to
4447 * parent proxy and receive, parse and resend parent proxy answer.
4449 if (http->ssl && !use_ssl_tunnel)
4451 if (fwd->forward_host != NULL)
4453 char server_response[BUFFER_SIZE];
4456 char *hdr = list_to_text(csp->headers);
4457 memset(server_response, 0, sizeof(server_response));
4461 log_error(LOG_LEVEL_FATAL,
4462 "Out of memory parsing client header");
4464 list_remove_all(csp->headers);
4467 * Sending client's CONNECT request to the parent proxy
4469 ret = write_socket(csp->server_connection.sfd, hdr, strlen(hdr));
4475 log_error(LOG_LEVEL_CONNECT,
4476 "Sending request headers to: %s failed", http->hostport);
4477 mark_server_socket_tainted(csp);
4478 close_client_ssl_connection(csp);
4482 /* Waiting for parent proxy server response */
4483 len = read_socket(csp->server_connection.sfd, server_response,
4484 sizeof(server_response)-1);
4488 log_error(LOG_LEVEL_ERROR, "No response from parent proxy "
4489 "server on socket %d.", csp->server_connection.sfd);
4491 rsp = error_response(csp, "no-server-data");
4494 send_crunch_response(csp, rsp);
4496 mark_server_socket_tainted(csp);
4497 close_client_ssl_connection(csp);
4502 * Test if the connection to the destination server was
4503 * established successfully by the parent proxy.
4505 if (!tunnel_established_successfully(server_response, (unsigned int)len))
4507 log_error(LOG_LEVEL_ERROR,
4508 "The forwarder %s failed to establish a connection with %s",
4509 fwd->forward_host, http->host);
4510 rsp = error_response(csp, "connect-failed");
4513 send_crunch_response(csp, rsp);
4515 mark_server_socket_tainted(csp);
4516 close_client_ssl_connection(csp);
4519 } /* -END- if (fwd->forward_host != NULL) */
4522 * We can now create the TLS/SSL connection with the destination server.
4524 int ret = create_server_ssl_connection(csp);
4527 if (csp->server_cert_verification_result != SSL_CERT_VALID &&
4528 csp->server_cert_verification_result != SSL_CERT_NOT_VERIFIED)
4531 * If the server certificate is invalid, we must inform
4532 * the client and then close connection to the client.
4534 ssl_send_certificate_error(csp);
4535 close_client_and_server_ssl_connections(csp);
4538 if (csp->server_cert_verification_result == SSL_CERT_NOT_VERIFIED
4539 || csp->server_cert_verification_result == SSL_CERT_VALID)
4542 * The TLS/SSL connection wasn't created but an invalid
4543 * certificate wasn't detected. Report it as connection
4546 rsp = error_response(csp, "connect-failed");
4549 send_crunch_response(csp, rsp);
4551 close_client_and_server_ssl_connections(csp);
4555 }/* -END- if (http->ssl) */
4556 #endif /* def FEATURE_HTTPS_INSPECTION */
4558 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4559 save_connection_destination(csp->server_connection.sfd,
4560 http, fwd, &csp->server_connection);
4561 csp->server_connection.keep_alive_timeout =
4562 (unsigned)csp->config->keep_alive_timeout;
4564 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4566 csp->server_connection.requests_sent_total++;
4568 if ((fwd->type == SOCKS_5T) && (NULL == csp->headers->first))
4570 /* Client headers have been sent optimistically */
4571 assert(csp->headers->last == NULL);
4573 else if (http->ssl == 0 || (fwd->forward_host
4574 #ifdef FEATURE_HTTPS_INSPECTION
4579 if (send_http_request(csp))
4581 rsp = error_response(csp, "connect-failed");
4584 send_crunch_response(csp, rsp);
4592 * Using old solution with SSL tunnel or new solution with SSL proxy
4594 list_remove_all(csp->headers);
4595 #ifdef FEATURE_HTTPS_INSPECTION
4600 * We're running an SSL tunnel and we're not forwarding,
4601 * so just ditch the client headers, send the "connect succeeded"
4602 * message to the client, flush the rest, and get out of the way.
4604 if (write_socket_delayed(csp->cfd, CSUCCEED,
4605 strlen(CSUCCEED), get_write_delay(csp)))
4610 #ifdef FEATURE_HTTPS_INSPECTION
4614 * If server certificate has been verified and is invalid,
4615 * we must inform the client and then close the connection
4616 * with client and server.
4618 if (csp->server_cert_verification_result != SSL_CERT_VALID &&
4619 csp->server_cert_verification_result != SSL_CERT_NOT_VERIFIED)
4621 ssl_send_certificate_error(csp);
4622 close_client_and_server_ssl_connections(csp);
4625 if (send_https_request(csp))
4627 rsp = error_response(csp, "connect-failed");
4630 send_crunch_response(csp, rsp);
4632 close_client_and_server_ssl_connections(csp);
4636 #endif /* def FEATURE_HTTPS_INSPECTION */
4637 clear_iob(csp->client_iob);
4638 }/* -END- else ... if (http->ssl == 1) */
4640 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
4642 /* XXX: should the time start earlier for optimistically sent data? */
4643 csp->server_connection.request_sent = time(NULL);
4645 handle_established_connection(csp);
4646 freez(csp->receive_buffer);
4651 /*********************************************************************
4653 * Function : fuzz_server_response
4655 * Description : Treat the input as a whole server response.
4658 * 1 : csp = Current client state (buffers, headers, etc...)
4659 * 2 : fuzz_input_file = File to read the input from.
4663 *********************************************************************/
4664 extern int fuzz_server_response(struct client_state *csp, char *fuzz_input_file)
4666 static struct forward_spec fwd; /* Zero'd due to being static */
4669 if (strcmp(fuzz_input_file, "-") == 0)
4671 /* XXX: Doesn't work yet. */
4672 csp->server_connection.sfd = 0;
4676 csp->server_connection.sfd = open(fuzz_input_file, O_RDONLY);
4677 if (csp->server_connection.sfd == -1)
4679 log_error(LOG_LEVEL_FATAL, "Failed to open %s: %E",
4684 csp->content_type |= CT_GIF;
4685 csp->action->flags |= ACTION_DEANIMATE;
4686 csp->action->string[ACTION_STRING_DEANIMATE] = "last";
4688 csp->http->path = strdup_or_die("/");
4689 csp->http->host = strdup_or_die("fuzz.example.org");
4690 csp->http->hostport = strdup_or_die("fuzz.example.org:80");
4691 /* Prevent client socket monitoring */
4692 csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
4693 csp->flags |= CSP_FLAG_CHUNKED;
4695 csp->config->feature_flags |= RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE;
4696 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
4698 csp->content_type |= CT_DECLARED|CT_GIF;
4700 csp->config->socket_timeout = 0;
4702 cgi_init_error_messages();
4704 handle_established_connection(csp);
4705 freez(csp->receive_buffer);
4712 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4713 /*********************************************************************
4715 * Function : prepare_csp_for_next_request
4717 * Description : Put the csp in a mostly vergin state.
4720 * 1 : csp = Current client state (buffers, headers, etc...)
4724 *********************************************************************/
4725 static void prepare_csp_for_next_request(struct client_state *csp)
4727 csp->content_type = 0;
4728 csp->content_length = 0;
4729 csp->expected_content_length = 0;
4730 csp->expected_client_content_length = 0;
4731 list_remove_all(csp->headers);
4732 clear_iob(csp->iob);
4733 freez(csp->error_message);
4734 free_http_request(csp->http);
4735 destroy_list(csp->headers);
4736 #ifdef FEATURE_HTTPS_INSPECTION
4737 destroy_list(csp->https_headers);
4739 destroy_list(csp->tags);
4740 #ifdef FEATURE_CLIENT_TAGS
4741 destroy_list(csp->client_tags);
4742 freez(csp->client_address);
4744 free_current_action(csp->action);
4745 if (NULL != csp->fwd)
4747 unload_forward_spec(csp->fwd);
4750 /* XXX: Store per-connection flags someplace else. */
4751 csp->flags = (CSP_FLAG_ACTIVE | CSP_FLAG_REUSED_CLIENT_CONNECTION);
4752 #ifdef FEATURE_TOGGLE
4753 if (global_toggle_state)
4754 #endif /* def FEATURE_TOGGLE */
4756 csp->flags |= CSP_FLAG_TOGGLED_ON;
4759 if (csp->client_iob->eod > csp->client_iob->cur)
4761 long bytes_to_shift = csp->client_iob->cur - csp->client_iob->buf;
4762 size_t data_length = (size_t)(csp->client_iob->eod - csp->client_iob->cur);
4764 assert(bytes_to_shift > 0);
4765 assert(data_length > 0);
4767 log_error(LOG_LEVEL_CONNECT, "Shifting %lu pipelined bytes by %ld bytes",
4768 data_length, bytes_to_shift);
4769 memmove(csp->client_iob->buf, csp->client_iob->cur, data_length);
4770 csp->client_iob->cur = csp->client_iob->buf;
4771 assert(csp->client_iob->eod == csp->client_iob->buf + bytes_to_shift + data_length);
4772 csp->client_iob->eod = csp->client_iob->buf + data_length;
4773 memset(csp->client_iob->eod, '\0', (size_t)bytes_to_shift);
4775 csp->flags |= CSP_FLAG_PIPELINED_REQUEST_WAITING;
4780 * We mainly care about resetting client_iob->cur so we don't
4781 * waste buffer space at the beginning and don't mess up the
4782 * request restoration done by cgi_show_request().
4784 * Freeing the buffer itself isn't technically necessary,
4785 * but makes debugging more convenient.
4787 clear_iob(csp->client_iob);
4790 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4793 /*********************************************************************
4797 * Description : This is little more than chat. We only "serve" to
4798 * to close (or remember) any socket that chat may have
4802 * 1 : csp = Current client state (buffers, headers, etc...)
4806 *********************************************************************/
4807 static void serve(struct client_state *csp)
4809 int config_file_change_detected = 0; /* Only used for debugging */
4810 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4811 #ifdef FEATURE_CONNECTION_SHARING
4812 static int monitor_thread_running = 0;
4813 #endif /* def FEATURE_CONNECTION_SHARING */
4814 int continue_chatting = 0;
4816 log_error(LOG_LEVEL_CONNECT, "Accepted connection from %s on socket %d",
4817 csp->ip_addr_str, csp->cfd);
4821 unsigned int latency;
4823 #ifdef FEATURE_HTTPS_INSPECTION
4824 if (continue_chatting && client_use_ssl(csp))
4826 continue_https_chat(csp);
4835 * If the request has been crunched,
4836 * the calculated latency is zero.
4838 latency = (unsigned)(csp->server_connection.response_received -
4839 csp->server_connection.request_sent) / 2;
4841 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
4842 && (csp->flags & CSP_FLAG_CRUNCHED)
4843 && (csp->expected_client_content_length != 0))
4845 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
4846 log_error(LOG_LEVEL_CONNECT,
4847 "Tainting client socket %d due to unread data.", csp->cfd);
4850 continue_chatting = (csp->config->feature_flags
4851 & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
4852 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
4853 && (csp->cfd != JB_INVALID_SOCKET)
4854 && (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
4855 && ((csp->flags & CSP_FLAG_SERVER_CONTENT_LENGTH_SET)
4856 || (csp->flags & CSP_FLAG_CHUNKED));
4858 if (!(csp->flags & CSP_FLAG_CRUNCHED)
4859 && (csp->server_connection.sfd != JB_INVALID_SOCKET))
4861 if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
4863 csp->server_connection.keep_alive_timeout = csp->config->default_server_timeout;
4865 if (!(csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
4866 || (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
4867 || !socket_is_still_alive(csp->server_connection.sfd)
4868 || !(latency < csp->server_connection.keep_alive_timeout))
4870 log_error(LOG_LEVEL_CONNECT,
4871 "Closing server socket %d connected to %s. "
4872 "Keep-alive: %u. Tainted: %u. Socket alive: %u. Timeout: %u.",
4873 csp->server_connection.sfd, (csp->server_connection.host != NULL) ?
4874 csp->server_connection.host : csp->http->host,
4875 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
4876 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
4877 socket_is_still_alive(csp->server_connection.sfd),
4878 csp->server_connection.keep_alive_timeout);
4879 #ifdef FEATURE_CONNECTION_SHARING
4880 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
4882 forget_connection(csp->server_connection.sfd);
4884 #endif /* def FEATURE_CONNECTION_SHARING */
4885 #ifdef FEATURE_HTTPS_INSPECTION
4886 close_server_ssl_connection(csp);
4888 close_socket(csp->server_connection.sfd);
4889 mark_connection_closed(&csp->server_connection);
4890 #ifdef FEATURE_HTTPS_INSPECTION
4891 if (continue_chatting && client_use_ssl(csp))
4894 * Close the client socket as well as Privoxy currently
4895 * can't establish a new server connection when the client
4896 * socket is reused and would drop the connection in
4897 * continue_https_chat() anyway.
4899 continue_chatting = 0;
4900 csp->flags &= ~CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
4901 log_error(LOG_LEVEL_CONNECT,
4902 "Client socket %d is no longer usable. "
4903 "The server socket has been closed.", csp->cfd);
4909 if (continue_chatting && any_loaded_file_changed(csp))
4911 continue_chatting = 0;
4912 config_file_change_detected = 1;
4914 #ifdef FEATURE_HTTPS_INSPECTION
4915 if (continue_chatting && client_use_ssl(csp) &&
4916 csp->ssl_with_client_is_opened == 0)
4918 continue_chatting = 0;
4919 log_error(LOG_LEVEL_CONNECT, "Client socket %d is no longer usable. "
4920 "The TLS session has been terminated.", csp->cfd);
4924 if (continue_chatting)
4926 if (((csp->flags & CSP_FLAG_PIPELINED_REQUEST_WAITING) != 0)
4927 && socket_is_still_alive(csp->cfd))
4929 log_error(LOG_LEVEL_CONNECT, "Client request %d has been "
4930 "pipelined on socket %d and the socket is still alive.",
4931 csp->requests_received_total+1, csp->cfd);
4932 prepare_csp_for_next_request(csp);
4936 if (0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE))
4938 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
4940 log_error(LOG_LEVEL_CONNECT,
4941 "Waiting for the next client request on socket %d. "
4942 "Keeping the server socket %d to %s open.",
4943 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
4947 log_error(LOG_LEVEL_CONNECT,
4948 "Waiting for the next client request on socket %d. "
4949 "No server socket to keep open.", csp->cfd);
4953 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
4954 && data_is_available(csp->cfd, (int)csp->config->keep_alive_timeout)
4955 && socket_is_still_alive(csp->cfd))
4957 log_error(LOG_LEVEL_CONNECT,
4958 "Data arrived in time on client socket %d. Requests so far: %u",
4959 csp->cfd, csp->requests_received_total);
4960 prepare_csp_for_next_request(csp);
4964 #ifdef FEATURE_CONNECTION_SHARING
4965 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
4966 && (csp->server_connection.sfd != JB_INVALID_SOCKET)
4967 && (socket_is_still_alive(csp->server_connection.sfd))
4968 #ifdef FEATURE_HTTPS_INSPECTION
4969 && !server_use_ssl(csp)
4973 time_t time_open = time(NULL) - csp->server_connection.timestamp;
4975 if (csp->server_connection.keep_alive_timeout < time_open - (time_t)latency)
4980 remember_connection(&csp->server_connection);
4981 csp->server_connection.sfd = JB_INVALID_SOCKET;
4982 drain_and_close_socket(csp->cfd);
4983 csp->cfd = JB_INVALID_SOCKET;
4984 privoxy_mutex_lock(&connection_reuse_mutex);
4985 if (!monitor_thread_running)
4987 monitor_thread_running = 1;
4988 privoxy_mutex_unlock(&connection_reuse_mutex);
4989 wait_for_alive_connections();
4990 privoxy_mutex_lock(&connection_reuse_mutex);
4991 monitor_thread_running = 0;
4993 privoxy_mutex_unlock(&connection_reuse_mutex);
4995 #endif /* def FEATURE_CONNECTION_SHARING */
4999 else if (csp->server_connection.sfd != JB_INVALID_SOCKET)
5001 log_error(LOG_LEVEL_CONNECT,
5002 "Closing server socket %d connected to %s. Keep-alive: %u. "
5003 "Tainted: %u. Socket alive: %u. Timeout: %u. "
5004 "Configuration file change detected: %u",
5005 csp->server_connection.sfd, csp->server_connection.host,
5006 0 != (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE),
5007 0 != (csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED),
5008 socket_is_still_alive(csp->server_connection.sfd),
5009 csp->server_connection.keep_alive_timeout,
5010 config_file_change_detected);
5012 } while (continue_chatting);
5016 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
5018 if (csp->cfd != JB_INVALID_SOCKET)
5020 log_error(LOG_LEVEL_CONNECT, "Closing client socket %d. "
5021 "Keep-alive: %u. Socket alive: %u. Data available: %u. "
5022 "Configuration file change detected: %u. Requests received: %u.",
5023 csp->cfd, 0 != (csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE),
5024 socket_is_still_alive(csp->cfd), data_is_available(csp->cfd, 0),
5025 config_file_change_detected, csp->requests_received_total);
5026 #ifdef FEATURE_HTTPS_INSPECTION
5027 close_client_ssl_connection(csp);
5029 drain_and_close_socket(csp->cfd);
5032 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
5034 #ifdef FEATURE_CONNECTION_SHARING
5035 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
5037 forget_connection(csp->server_connection.sfd);
5039 #endif /* def FEATURE_CONNECTION_SHARING */
5041 #ifdef FEATURE_HTTPS_INSPECTION
5042 close_server_ssl_connection(csp);
5043 #endif /* def FEATURE_HTTPS_INSPECTION */
5045 close_socket(csp->server_connection.sfd);
5048 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
5049 mark_connection_closed(&csp->server_connection);
5052 free_csp_resources(csp);
5054 csp->flags &= ~CSP_FLAG_ACTIVE;
5060 /*********************************************************************
5062 * Function : server_thread
5064 * Description : We only exist to call `serve' in a threaded environment.
5067 * 1 : data = Current client state (buffers, headers, etc...)
5069 * Returns : Always 0.
5071 *********************************************************************/
5072 static int32 server_thread(void *data)
5074 serve((struct client_state *) data);
5081 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
5082 /*********************************************************************
5086 * Description : Print usage info & exit.
5088 * Parameters : Pointer to argv[0] for identifying ourselves
5092 *********************************************************************/
5093 static void usage(const char *name)
5095 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
5096 "Usage: %s [--config-test] "
5099 #endif /* defined(unix) */
5102 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
5103 #endif /* defined(unix) */
5104 "[--version] [configfile]\n",
5108 show_fuzz_usage(name);
5111 printf("Aborting\n");
5116 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
5119 #ifdef MUTEX_LOCKS_AVAILABLE
5120 /*********************************************************************
5122 * Function : privoxy_mutex_lock
5124 * Description : Locks a mutex.
5127 * 1 : mutex = The mutex to lock.
5129 * Returns : Void. May exit in case of errors.
5131 *********************************************************************/
5132 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
5134 #ifdef FEATURE_PTHREAD
5135 int err = pthread_mutex_lock(mutex);
5138 if (mutex != &log_mutex)
5140 log_error(LOG_LEVEL_FATAL,
5141 "Mutex locking failed: %s.\n", strerror(err));
5146 EnterCriticalSection(mutex);
5147 #endif /* def FEATURE_PTHREAD */
5151 /*********************************************************************
5153 * Function : privoxy_mutex_unlock
5155 * Description : Unlocks a mutex.
5158 * 1 : mutex = The mutex to unlock.
5160 * Returns : Void. May exit in case of errors.
5162 *********************************************************************/
5163 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
5165 #ifdef FEATURE_PTHREAD
5166 int err = pthread_mutex_unlock(mutex);
5169 if (mutex != &log_mutex)
5171 log_error(LOG_LEVEL_FATAL,
5172 "Mutex unlocking failed: %s.\n", strerror(err));
5177 LeaveCriticalSection(mutex);
5178 #endif /* def FEATURE_PTHREAD */
5182 /*********************************************************************
5184 * Function : privoxy_mutex_init
5186 * Description : Prepares a mutex.
5189 * 1 : mutex = The mutex to initialize.
5191 * Returns : Void. May exit in case of errors.
5193 *********************************************************************/
5194 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
5196 #ifdef FEATURE_PTHREAD
5197 int err = pthread_mutex_init(mutex, 0);
5200 printf("Fatal error. Mutex initialization failed: %s.\n",
5205 InitializeCriticalSection(mutex);
5206 #endif /* def FEATURE_PTHREAD */
5208 #endif /* def MUTEX_LOCKS_AVAILABLE */
5210 /*********************************************************************
5212 * Function : initialize_mutexes
5214 * Description : Prepares mutexes if mutex support is available.
5218 * Returns : Void, exits in case of errors.
5220 *********************************************************************/
5221 static void initialize_mutexes(void)
5223 #ifdef MUTEX_LOCKS_AVAILABLE
5225 * Prepare global mutex semaphores
5228 #ifdef FEATURE_HTTPS_INSPECTION
5229 privoxy_mutex_init(&certificate_mutex);
5230 privoxy_mutex_init(&ssl_init_mutex);
5233 privoxy_mutex_init(&log_mutex);
5234 privoxy_mutex_init(&log_init_mutex);
5235 privoxy_mutex_init(&connection_reuse_mutex);
5236 #ifdef FEATURE_EXTERNAL_FILTERS
5237 privoxy_mutex_init(&external_filter_mutex);
5239 #ifdef FEATURE_CLIENT_TAGS
5240 privoxy_mutex_init(&client_tags_mutex);
5242 #ifdef FEATURE_EXTENDED_STATISTICS
5243 privoxy_mutex_init(&filter_statistics_mutex);
5244 privoxy_mutex_init(&block_statistics_mutex);
5248 * XXX: The assumptions below are a bit naive
5249 * and can cause locks that aren't necessary.
5251 * For example older FreeBSD versions (< 6.x?)
5252 * have no gethostbyname_r, but gethostbyname is
5255 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
5256 privoxy_mutex_init(&resolver_mutex);
5257 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
5259 * XXX: should we use a single mutex for
5260 * localtime() and gmtime() as well?
5262 #ifndef HAVE_GMTIME_R
5263 privoxy_mutex_init(&gmtime_mutex);
5264 #endif /* ndef HAVE_GMTIME_R */
5266 #ifndef HAVE_LOCALTIME_R
5267 privoxy_mutex_init(&localtime_mutex);
5268 #endif /* ndef HAVE_GMTIME_R */
5270 #if !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM)
5271 privoxy_mutex_init(&rand_mutex);
5272 #endif /* !defined(HAVE_ARC4RANDOM) && !defined(HAVE_RANDOM) */
5274 #endif /* def MUTEX_LOCKS_AVAILABLE */
5277 /*********************************************************************
5281 * Description : Load the config file and start the listen loop.
5282 * This function is a lot more *sane* with the `load_config'
5283 * and `listen_loop' functions; although it stills does
5284 * a *little* too much for my taste.
5287 * 1 : argc = Number of parameters (including $0).
5288 * 2 : argv = Array of (char *)'s to the parameters.
5290 * Returns : 1 if : can't open config file, unrecognized directive,
5291 * stats requested in multi-thread mode, can't open the
5292 * log file, can't open the jar file, listen port is invalid,
5293 * any load fails, and can't bind port.
5295 * Else main never returns, the process must be signaled
5296 * to terminate execution. Or, on Windows, use the
5297 * "File", "Exit" menu option.
5299 *********************************************************************/
5301 int real_main(int argc, char **argv)
5303 int main(int argc, char **argv)
5307 int do_config_test = 0;
5308 #ifndef HAVE_ARC4RANDOM
5309 unsigned int random_seed;
5312 struct passwd *pw = NULL;
5313 struct group *grp = NULL;
5315 char *pre_chroot_nslookup_to_load_resolver = NULL;
5318 char *fuzz_input_type = NULL;
5319 char *fuzz_input_file = NULL;
5326 #if !defined(_WIN32)
5333 /* Prepare mutexes if supported and necessary. */
5334 initialize_mutexes();
5336 /* Enable logging until further notice. */
5340 * Parse the command line arguments
5342 * XXX: simply printing usage information in case of
5343 * invalid arguments isn't particularly user friendly.
5345 while (++argc_pos < argc)
5348 /* Check to see if the service must be installed or uninstalled */
5349 if (strncmp(argv[argc_pos], "--install", 9) == 0)
5351 const char *pName = argv[argc_pos] + 9;
5354 exit((install_service(pName)) ? 0 : 1);
5356 else if (strncmp(argv[argc_pos], "--uninstall", 11) == 0)
5358 const char *pName = argv[argc_pos] + 11;
5361 exit((uninstall_service(pName)) ? 0 : 1);
5363 else if (strcmp(argv[argc_pos], "--service") == 0)
5365 bRunAsService = TRUE;
5366 w32_set_service_cwd();
5367 atexit(w32_service_exit_notify);
5370 #endif /* defined(_WIN32) */
5373 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
5375 if (strcmp(argv[argc_pos], "--help") == 0)
5380 else if (strcmp(argv[argc_pos], "--version") == 0)
5382 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
5388 else if (strcmp(argv[argc_pos], "--no-daemon") == 0)
5390 set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
5394 else if (strcmp(argv[argc_pos], "--pidfile") == 0)
5396 if (++argc_pos == argc) usage(argv[0]);
5397 pidfile = strdup_or_die(argv[argc_pos]);
5400 else if (strcmp(argv[argc_pos], "--user") == 0)
5405 if (++argc_pos == argc) usage(argv[argc_pos]);
5407 user_arg = strdup_or_die(argv[argc_pos]);
5408 group_name = strchr(user_arg, '.');
5409 if (NULL != group_name)
5411 /* Nul-terminate the user name */
5414 /* Skip the former delimiter to actually reach the group name */
5417 grp = getgrnam(group_name);
5420 log_error(LOG_LEVEL_FATAL, "Group '%s' not found.", group_name);
5423 pw = getpwnam(user_arg);
5426 log_error(LOG_LEVEL_FATAL, "User '%s' not found.", user_arg);
5432 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup") == 0)
5434 if (++argc_pos == argc) usage(argv[0]);
5435 pre_chroot_nslookup_to_load_resolver = strdup_or_die(argv[argc_pos]);
5438 else if (strcmp(argv[argc_pos], "--chroot") == 0)
5442 #endif /* defined(unix) */
5444 else if (strcmp(argv[argc_pos], "--config-test") == 0)
5449 else if (strcmp(argv[argc_pos], "--fuzz") == 0)
5452 if (argc < argc_pos + 2) usage(argv[0]);
5453 fuzz_input_type = argv[argc_pos];
5455 fuzz_input_file = argv[argc_pos];
5457 else if (strcmp(argv[argc_pos], "--stfu") == 0)
5459 set_debug_level(LOG_LEVEL_STFU);
5462 else if (argc_pos + 1 != argc)
5465 * This is neither the last command line
5466 * option, nor was it recognized before,
5467 * therefore it must be invalid.
5473 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
5475 configfile = argv[argc_pos];
5478 } /* -END- while (more arguments) */
5480 show_version(Argv[0]);
5483 if (*configfile != '/')
5485 char cwd[BUFFER_SIZE];
5487 size_t abs_file_size;
5489 /* make config-filename absolute here */
5490 if (NULL == getcwd(cwd, sizeof(cwd)))
5492 perror("failed to get current working directory");
5496 basedir = strdup_or_die(cwd);
5498 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
5499 abs_file = malloc_or_die(abs_file_size);
5500 strlcpy(abs_file, basedir, abs_file_size);
5501 strlcat(abs_file, "/", abs_file_size);
5502 strlcat(abs_file, configfile, abs_file_size);
5503 configfile = abs_file;
5505 #endif /* defined unix */
5509 clients->next = NULL;
5511 /* XXX: factor out initialising after the next stable release. */
5516 #ifndef HAVE_ARC4RANDOM
5517 random_seed = (unsigned int)time(NULL);
5519 srandom(random_seed);
5522 #endif /* ifdef HAVE_RANDOM */
5523 #endif /* ifndef HAVE_ARC4RANDOM */
5526 * Unix signal handling
5528 * Catch the abort, interrupt and terminate signals for a graceful exit
5529 * Catch the hangup signal so the errlog can be reopened.
5531 * Ignore the broken pipe signal as connection failures
5532 * are handled when and where they occur without relying
5535 #if !defined(_WIN32)
5538 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP };
5540 for (idx = 0; idx < SZ(catched_signals); idx++)
5542 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
5543 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
5545 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
5546 #endif /* ifdef sun */
5548 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
5552 if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
5554 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for SIGPIPE: %E");
5558 #else /* ifdef _WIN32 */
5559 # ifdef _WIN_CONSOLE
5561 * We *are* in a windows console app.
5562 * Print a verbose messages about FAQ's and such
5564 printf("%s", win32_blurb);
5565 # endif /* def _WIN_CONSOLE */
5566 #endif /* def _WIN32 */
5569 if (fuzz_input_type != NULL)
5571 exit(process_fuzzed_input(fuzz_input_type, fuzz_input_file));
5573 log_error(LOG_LEVEL_FATAL,
5574 "When compiled with fuzzing support, Privoxy should only be used for fuzzing. "
5575 "Various data structures are static which is unsafe when using threads.");
5580 exit(NULL == load_config());
5583 /* Initialize the CGI subsystem */
5584 cgi_init_error_messages();
5587 * If running on unix and without the --no-daemon
5588 * option, become a daemon. I.e. fork, detach
5589 * from tty and get process group leadership
5598 if (pid < 0) /* error */
5603 else if (pid != 0) /* parent */
5608 * must check for errors
5609 * child died due to missing files aso
5612 wpid = waitpid(pid, &status, WNOHANG);
5624 * stderr (fd 2) will be closed later on,
5625 * when the config file has been parsed.
5631 * Reserve fd 0 and 1 to prevent abort() and friends
5632 * from sending stuff to the clients or servers.
5634 fd = open("/dev/null", O_RDONLY);
5637 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
5641 if (dup2(fd, 0) == -1)
5643 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 0: %E");
5647 fd = open("/dev/null", O_WRONLY);
5650 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
5654 if (dup2(fd, 1) == -1)
5656 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 1: %E");
5661 #ifdef FEATURE_EXTERNAL_FILTERS
5662 for (fd = 0; fd < 3; fd++)
5664 mark_socket_for_close_on_execute(fd);
5668 if (chdir("/") != 0)
5670 log_error(LOG_LEVEL_FATAL, "Failed to cd into '/': %E");
5673 } /* -END- if (daemon_mode) */
5676 * As soon as we have written the PID file, we can switch
5677 * to the user and group ID indicated by the --user option
5679 if (pidfile != NULL)
5681 write_pid_file(pidfile);
5685 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
5687 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
5691 if (setgroups(1, &grp->gr_gid))
5693 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
5696 else if (initgroups(pw->pw_name, pw->pw_gid))
5698 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
5704 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
5706 /* Read the time zone file from /etc before doing chroot. */
5708 if (NULL != pre_chroot_nslookup_to_load_resolver
5709 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
5711 /* Initialize resolver library. */
5712 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
5714 if (chroot(pw->pw_dir) < 0)
5716 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
5720 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
5723 if (setuid(pw->pw_uid))
5725 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
5729 char putenv_dummy[64];
5731 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
5732 if (putenv(putenv_dummy) != 0)
5734 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
5737 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
5738 if (putenv(putenv_dummy) != 0)
5740 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
5746 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
5749 #endif /* defined unix */
5752 /* This will be FALSE unless the command line specified --service
5756 /* Yup, so now we must attempt to establish a connection
5757 * with the service dispatcher. This will only work if this
5758 * process was launched by the service control manager to
5759 * actually run as a service. If this isn't the case, i've
5760 * known it take around 30 seconds or so for the call to return.
5763 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
5764 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
5766 /* Service has run, and at this point is now being stopped, so just return */
5771 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
5773 /* An error occurred. Usually it's because --service was wrongly specified
5774 * and we were unable to connect to the Service Control Dispatcher because
5775 * it wasn't expecting us and is therefore not listening.
5777 * For now, just continue below to call the listen_loop function.
5780 #endif /* def _WIN32 */
5790 /*********************************************************************
5792 * Function : bind_port_helper
5794 * Description : Bind the listen port. Handles logging, and aborts
5798 * 1 : haddr = Host address to bind to. Use NULL to bind to
5800 * 2 : hport = Specifies port to bind to.
5801 * 3 : backlog = Listen backlog.
5803 * Returns : Port that was opened.
5805 *********************************************************************/
5806 static jb_socket bind_port_helper(const char *haddr, int hport, int backlog)
5811 result = bind_port(haddr, hport, backlog, &bfd);
5815 const char *bind_address = (NULL != haddr) ? haddr : "INADDR_ANY";
5819 log_error(LOG_LEVEL_FATAL,
5820 "can't bind to %s:%d: There may be another Privoxy "
5821 "or some other proxy running on port %d",
5822 bind_address, hport, hport);
5825 log_error(LOG_LEVEL_FATAL,
5826 "can't bind to %s:%d: The hostname is not resolvable",
5827 bind_address, hport);
5830 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: %E",
5831 bind_address, hport);
5834 /* shouldn't get here */
5835 return JB_INVALID_SOCKET;
5840 if (bfd >= FD_SETSIZE)
5842 log_error(LOG_LEVEL_FATAL,
5843 "Bind socket number too high to use select(): %d >= %d",
5851 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
5856 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
5864 /*********************************************************************
5866 * Function : bind_ports_helper
5868 * Description : Bind the listen ports. Handles logging, and aborts
5872 * 1 : config = Privoxy configuration. Specifies ports
5874 * 2 : sockets = Preallocated array of opened sockets
5875 * corresponding to specification in config.
5876 * All non-opened sockets will be set to
5877 * JB_INVALID_SOCKET.
5879 * Returns : Nothing. Inspect sockets argument.
5881 *********************************************************************/
5882 static void bind_ports_helper(struct configuration_spec * config,
5883 jb_socket sockets[])
5887 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
5889 if (config->hport[i])
5891 sockets[i] = bind_port_helper(config->haddr[i],
5892 config->hport[i], config->listen_backlog);
5893 #if defined(FEATURE_ACCEPT_FILTER) && defined(SO_ACCEPTFILTER)
5894 if (config->enable_accept_filter && sockets[i] != JB_INVALID_SOCKET)
5896 struct accept_filter_arg af_options;
5897 bzero(&af_options, sizeof(af_options));
5898 strlcpy(af_options.af_name, "httpready", sizeof(af_options.af_name));
5899 if (setsockopt(sockets[i], SOL_SOCKET, SO_ACCEPTFILTER, &af_options,
5900 sizeof(af_options)))
5902 log_error(LOG_LEVEL_ERROR,
5903 "Enabling accept filter for socket %d failed: %E", sockets[i]);
5910 sockets[i] = JB_INVALID_SOCKET;
5913 config->need_bind = 0;
5917 /*********************************************************************
5919 * Function : close_ports_helper
5921 * Description : Close listenings ports.
5924 * 1 : sockets = Array of opened and non-opened sockets to
5925 * close. All sockets will be set to
5926 * JB_INVALID_SOCKET.
5928 * Returns : Nothing.
5930 *********************************************************************/
5931 static void close_ports_helper(jb_socket sockets[])
5935 for (i = 0; i < MAX_LISTENING_SOCKETS; i++)
5937 if (JB_INVALID_SOCKET != sockets[i])
5939 close_socket(sockets[i]);
5941 sockets[i] = JB_INVALID_SOCKET;
5947 /* Without this simple workaround we get this compiler warning from _beginthread
5948 * warning C4028: formal parameter 1 different from declaration
5950 void w32_service_listen_loop(void *p)
5954 #endif /* def _WIN32 */
5957 /*********************************************************************
5959 * Function : listen_loop
5961 * Description : bind the listen port and enter a "FOREVER" listening loop.
5967 *********************************************************************/
5968 static void listen_loop(void)
5970 struct client_states *csp_list = NULL;
5971 struct client_state *csp = NULL;
5972 jb_socket bfds[MAX_LISTENING_SOCKETS];
5973 struct configuration_spec *config;
5974 unsigned int active_threads = 0;
5975 #if defined(FEATURE_PTHREAD)
5976 pthread_attr_t attrs;
5978 pthread_attr_init(&attrs);
5979 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
5982 config = load_config();
5984 #ifdef FEATURE_CONNECTION_SHARING
5986 * XXX: Should be relocated once it no
5987 * longer needs to emit log messages.
5989 initialize_reusable_connections();
5990 #endif /* def FEATURE_CONNECTION_SHARING */
5992 bind_ports_helper(config, bfds);
5994 #ifdef FEATURE_GRACEFUL_TERMINATION
5995 while (!g_terminate)
6000 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__)
6001 while (waitpid(-1, NULL, WNOHANG) > 0)
6003 /* zombie children */
6005 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) */
6008 * Free data that was used by died threads
6010 active_threads = sweep();
6014 * Re-open the errlog after HUP signal
6016 if (received_hup_signal)
6018 if (NULL != config->logfile)
6020 init_error_log(Argv[0], config->logfile);
6022 received_hup_signal = 0;
6026 csp_list = zalloc_or_die(sizeof(*csp_list));
6027 csp = &csp_list->csp;
6029 log_error(LOG_LEVEL_CONNECT,
6030 "Waiting for the next client connection. Currently active threads: %u",
6034 * This config may be outdated, but for accept_connection()
6035 * it's fresh enough.
6037 csp->config = config;
6039 if (!accept_connection(csp, bfds))
6041 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
6046 csp->flags |= CSP_FLAG_ACTIVE;
6047 csp->server_connection.sfd = JB_INVALID_SOCKET;
6049 csp->config = config = load_config();
6051 if (config->need_bind)
6054 * Since we were listening to the "old port", we will not see
6055 * a "listen" param change until the next request. So, at
6056 * least 1 more request must be made for us to find the new
6057 * setting. I am simply closing the old socket and binding the
6060 * Which-ever is correct, we will serve 1 more page via the
6061 * old settings. This should probably be a "show-status"
6062 * request. This should not be a so common of an operation
6063 * that this will hurt people's feelings.
6066 close_ports_helper(bfds);
6068 bind_ports_helper(config, bfds);
6071 #ifdef FEATURE_TOGGLE
6072 if (global_toggle_state)
6073 #endif /* def FEATURE_TOGGLE */
6075 csp->flags |= CSP_FLAG_TOGGLED_ON;
6078 if (run_loader(csp))
6080 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
6081 /* Never get here - LOG_LEVEL_FATAL causes program exit */
6085 if (block_acl(NULL,csp))
6087 log_error(LOG_LEVEL_CONNECT,
6088 "Connection from %s on %s (socket %d) dropped due to ACL",
6089 csp->ip_addr_str, csp->listen_addr_str, csp->cfd);
6090 close_socket(csp->cfd);
6091 freez(csp->ip_addr_str);
6092 freez(csp->listen_addr_str);
6096 #endif /* def FEATURE_ACL */
6098 if ((0 != config->max_client_connections)
6099 && (active_threads >= config->max_client_connections))
6101 log_error(LOG_LEVEL_CONNECT,
6102 "Rejecting connection from %s. Maximum number of connections reached.",
6104 write_socket_delayed(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
6105 strlen(TOO_MANY_CONNECTIONS_RESPONSE), get_write_delay(csp));
6106 close_socket(csp->cfd);
6107 freez(csp->ip_addr_str);
6108 freez(csp->listen_addr_str);
6113 /* add it to the list of clients */
6114 csp_list->next = clients->next;
6115 clients->next = csp_list;
6117 if (config->multi_threaded)
6121 /* this is a switch () statement in the C preprocessor - ugh */
6122 #undef SELECTED_ONE_OPTION
6124 /* Use Pthreads in preference to native code */
6125 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
6126 #define SELECTED_ONE_OPTION
6128 pthread_t the_thread;
6131 ret = pthread_create(&the_thread, &attrs,
6132 (void * (*)(void *))serve, csp);
6133 child_id = ret ? -1 : 0;
6137 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
6138 #define SELECTED_ONE_OPTION
6139 child_id = _beginthread(
6140 (void (*)(void *))serve,
6145 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
6146 #define SELECTED_ONE_OPTION
6148 thread_id tid = spawn_thread
6149 (server_thread, "server", B_NORMAL_PRIORITY, csp);
6151 if ((tid >= 0) && (resume_thread(tid) == B_OK))
6153 child_id = (int) tid;
6162 #if !defined(SELECTED_ONE_OPTION)
6165 /* This block is only needed when using fork().
6166 * When using threads, the server thread was
6167 * created and run by the call to _beginthread().
6169 if (child_id == 0) /* child */
6172 #ifdef FEATURE_TOGGLE
6173 int inherited_toggle_state = global_toggle_state;
6174 #endif /* def FEATURE_TOGGLE */
6179 * If we've been toggled or we've blocked the request, tell Mom
6182 #ifdef FEATURE_TOGGLE
6183 if (inherited_toggle_state != global_toggle_state)
6185 rc |= RC_FLAG_TOGGLED;
6187 #endif /* def FEATURE_TOGGLE */
6189 #ifdef FEATURE_STATISTICS
6190 if (csp->flags & CSP_FLAG_REJECTED)
6192 rc |= RC_FLAG_BLOCKED;
6194 #endif /* ndef FEATURE_STATISTICS */
6198 else if (child_id > 0) /* parent */
6200 /* in a fork()'d environment, the parent's
6201 * copy of the client socket and the CSP
6205 #if !defined(_WIN32) && !defined(__CYGWIN__)
6207 wait(&child_status);
6210 * Evaluate child's return code: If the child has
6211 * - been toggled, toggle ourselves
6212 * - blocked its request, bump up the stats counter
6215 #ifdef FEATURE_TOGGLE
6216 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
6218 global_toggle_state = !global_toggle_state;
6220 #endif /* def FEATURE_TOGGLE */
6222 #ifdef FEATURE_STATISTICS
6224 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
6228 #endif /* def FEATURE_STATISTICS */
6230 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
6231 close_socket(csp->cfd);
6232 csp->flags &= ~CSP_FLAG_ACTIVE;
6236 #undef SELECTED_ONE_OPTION
6237 /* end of cpp switch () */
6242 * Spawning the child failed, assume it's because
6243 * there are too many children running already.
6244 * XXX: If you assume ...
6246 log_error(LOG_LEVEL_ERROR,
6247 "Unable to take any additional connections: %E. Active threads: %u",
6249 write_socket_delayed(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
6250 strlen(TOO_MANY_CONNECTIONS_RESPONSE), get_write_delay(csp));
6251 close_socket(csp->cfd);
6252 csp->flags &= ~CSP_FLAG_ACTIVE;
6261 #if defined(FEATURE_PTHREAD)
6262 pthread_attr_destroy(&attrs);
6265 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
6267 #ifdef FEATURE_GRACEFUL_TERMINATION
6269 log_error(LOG_LEVEL_INFO, "Graceful termination requested.");
6271 unload_current_config_file();
6272 unload_current_actions_file();
6273 unload_current_re_filterfile();
6274 #ifdef FEATURE_TRUST
6275 unload_current_trust_file();
6278 if (config->multi_threaded)
6285 } while ((clients->next != NULL) && (--i > 0));
6289 log_error(LOG_LEVEL_ERROR, "Graceful termination failed "
6290 "- still some live clients after 1 minute wait.");
6300 #ifdef FEATURE_HTTPS_INSPECTION
6302 * Only release TLS backed resources if there
6303 * are no active connections left.
6305 if (clients->next == NULL)
6311 log_error(LOG_LEVEL_INFO, "Exiting gracefully.");
6313 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
6314 /* Cleanup - remove taskbar icon etc. */
6319 #endif /* FEATURE_GRACEFUL_TERMINATION */