1 const char jcc_rcs[] = "$Id: jcc.c,v 1.315 2010/04/12 16:51:31 fabiankeil Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/jcc.c,v $
6 * Purpose : Main file. Contains main() method, main loop, and
7 * the main connection-handling function.
9 * Copyright : Written by and Copyright (C) 2001-2010 the
10 * Privoxy team. http://www.privoxy.org/
12 * Based on the Internet Junkbuster originally written
13 * by and Copyright (C) 1997 Anonymous Coders and
14 * Junkbusters Corporation. http://www.junkbusters.com
16 * This program is free software; you can redistribute it
17 * and/or modify it under the terms of the GNU General
18 * Public License as published by the Free Software
19 * Foundation; either version 2 of the License, or (at
20 * your option) any later version.
22 * This program is distributed in the hope that it will
23 * be useful, but WITHOUT ANY WARRANTY; without even the
24 * implied warranty of MERCHANTABILITY or FITNESS FOR A
25 * PARTICULAR PURPOSE. See the GNU General Public
26 * License for more details.
28 * The GNU General Public License should be included with
29 * this file. If not, you can view it at
30 * http://www.gnu.org/copyleft/gpl.html
31 * or write to the Free Software Foundation, Inc., 59
32 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
34 *********************************************************************/
40 #include <sys/types.h>
49 # ifndef FEATURE_PTHREAD
55 # endif /* ndef FEATURE_PTHREAD */
60 # endif /* ndef _WIN_CONSOLE */
61 # include "w32svrapi.h"
63 #else /* ifndef _WIN32 */
65 # if !defined (__OS2__)
67 # include <sys/wait.h>
68 # endif /* ndef __OS2__ */
69 # include <sys/time.h>
70 # include <sys/stat.h>
71 # include <sys/ioctl.h>
74 #include <sys/termios.h>
85 # include <socket.h> /* BeOS has select() for sockets only. */
86 # include <OS.h> /* declarations for threads and stuff. */
89 # if defined(__EMX__) || defined(__OS2__)
90 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
95 #define bzero(B,N) memset(B,0x00,n)
110 #include "miscutil.h"
112 #include "jbsockets.h"
117 #include "urlmatch.h"
119 const char jcc_h_rcs[] = JCC_H_VERSION;
120 const char project_h_rcs[] = PROJECT_H_VERSION;
123 struct client_state clients[1];
124 struct file_list files[1];
126 #ifdef FEATURE_STATISTICS
127 int urls_read = 0; /* total nr of urls read inc rejected */
128 int urls_rejected = 0; /* total nr of urls rejected */
129 #endif /* def FEATURE_STATISTICS */
131 #ifdef FEATURE_GRACEFUL_TERMINATION
135 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
136 static void sig_handler(int the_signal);
138 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
139 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
140 static jb_err get_server_headers(struct client_state *csp);
141 static const char *crunch_reason(const struct http_response *rsp);
142 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
143 static char *get_request_line(struct client_state *csp);
144 static jb_err receive_client_request(struct client_state *csp);
145 static jb_err parse_client_request(struct client_state *csp);
146 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
147 static jb_err change_request_destination(struct client_state *csp);
148 static void chat(struct client_state *csp);
149 static void serve(struct client_state *csp);
150 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
151 static void usage(const char *myname);
153 static void initialize_mutexes(void);
154 static jb_socket bind_port_helper(struct configuration_spec *config);
155 static void listen_loop(void);
158 void serve(struct client_state *csp);
159 #else /* ifndef AMIGA */
160 static void serve(struct client_state *csp);
161 #endif /* def AMIGA */
164 static int32 server_thread(void *data);
165 #endif /* def __BEOS__ */
168 #define sleep(N) Sleep(((N) * 1000))
172 #define sleep(N) DosSleep(((N) * 100))
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 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
184 privoxy_mutex_t resolver_mutex;
185 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
187 #ifndef HAVE_GMTIME_R
188 privoxy_mutex_t gmtime_mutex;
189 #endif /* ndef HAVE_GMTIME_R */
191 #ifndef HAVE_LOCALTIME_R
192 privoxy_mutex_t localtime_mutex;
193 #endif /* ndef HAVE_GMTIME_R */
196 privoxy_mutex_t rand_mutex;
197 #endif /* ndef HAVE_RANDOM */
199 #endif /* def MUTEX_LOCKS_AVAILABLE */
202 const char *basedir = NULL;
203 const char *pidfile = NULL;
204 static int received_hup_signal = 0;
205 #endif /* defined unix */
207 /* HTTP snipplets. */
208 static const char CSUCCEED[] =
209 "HTTP/1.0 200 Connection established\r\n"
210 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
212 static const char CHEADER[] =
213 "HTTP/1.0 400 Invalid header received from client\r\n"
214 "Proxy-Agent: Privoxy " VERSION "\r\n"
215 "Content-Type: text/plain\r\n"
216 "Connection: close\r\n\r\n"
217 "Invalid header received from client.\r\n";
219 static const char FTP_RESPONSE[] =
220 "HTTP/1.0 400 Invalid request received from client\r\n"
221 "Content-Type: text/plain\r\n"
222 "Connection: close\r\n\r\n"
223 "Invalid request. Privoxy doesn't support FTP.\r\n";
225 static const char GOPHER_RESPONSE[] =
226 "HTTP/1.0 400 Invalid request received from client\r\n"
227 "Content-Type: text/plain\r\n"
228 "Connection: close\r\n\r\n"
229 "Invalid request. Privoxy doesn't support gopher.\r\n";
231 /* XXX: should be a template */
232 static const char MISSING_DESTINATION_RESPONSE[] =
233 "HTTP/1.0 400 Bad request received from client\r\n"
234 "Proxy-Agent: Privoxy " VERSION "\r\n"
235 "Content-Type: text/plain\r\n"
236 "Connection: close\r\n\r\n"
237 "Bad request. Privoxy was unable to extract the destination.\r\n";
239 /* XXX: should be a template */
240 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
241 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
242 "Proxy-Agent: Privoxy " VERSION "\r\n"
243 "Content-Type: text/plain\r\n"
244 "Connection: close\r\n\r\n"
245 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
248 /* XXX: should be a template */
249 static const char NULL_BYTE_RESPONSE[] =
250 "HTTP/1.0 400 Bad request received from client\r\n"
251 "Proxy-Agent: Privoxy " VERSION "\r\n"
252 "Content-Type: text/plain\r\n"
253 "Connection: close\r\n\r\n"
254 "Bad request. Null byte(s) before end of request.\r\n";
257 /* XXX: should be a template */
258 static const char MESSED_UP_REQUEST_RESPONSE[] =
259 "HTTP/1.0 400 Malformed request after rewriting\r\n"
260 "Proxy-Agent: Privoxy " VERSION "\r\n"
261 "Content-Type: text/plain\r\n"
262 "Connection: close\r\n\r\n"
263 "Bad request. Messed up with header filters.\r\n";
265 static const char TOO_MANY_CONNECTIONS_RESPONSE[] =
266 "HTTP/1.0 503 Too many open connections\r\n"
267 "Proxy-Agent: Privoxy " VERSION "\r\n"
268 "Content-Type: text/plain\r\n"
269 "Connection: close\r\n\r\n"
270 "Maximum number of open connections reached.\r\n";
272 static const char CLIENT_CONNECTION_TIMEOUT_RESPONSE[] =
273 "HTTP/1.0 504 Connection timeout\r\n"
274 "Proxy-Agent: Privoxy " VERSION "\r\n"
275 "Content-Type: text/plain\r\n"
276 "Connection: close\r\n\r\n"
277 "The connection timed out because the client request didn't arrive in time.\r\n";
279 /* A function to crunch a response */
280 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
282 /* Crunch function flags */
283 #define CF_NO_FLAGS 0
284 /* Cruncher applies to forced requests as well */
285 #define CF_IGNORE_FORCE 1
286 /* Crunched requests are counted for the block statistics */
287 #define CF_COUNT_AS_REJECT 2
289 /* A crunch function and its flags */
292 const crunch_func_ptr cruncher;
296 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
298 /* Complete list of cruncher functions */
299 static const struct cruncher crunchers_all[] = {
300 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
301 { block_url, CF_COUNT_AS_REJECT },
303 { trust_url, CF_COUNT_AS_REJECT },
304 #endif /* def FEATURE_TRUST */
305 { redirect_url, CF_NO_FLAGS },
306 { dispatch_cgi, CF_IGNORE_FORCE},
310 /* Light version, used after tags are applied */
311 static const struct cruncher crunchers_light[] = {
312 { block_url, CF_COUNT_AS_REJECT },
313 { redirect_url, CF_NO_FLAGS },
319 * XXX: Don't we really mean
325 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
326 /*********************************************************************
328 * Function : sig_handler
330 * Description : Signal handler for different signals.
331 * Exit gracefully on TERM and INT
332 * or set a flag that will cause the errlog
333 * to be reopened by the main thread on HUP.
336 * 1 : the_signal = the signal cause this function to call
340 *********************************************************************/
341 static void sig_handler(int the_signal)
347 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
359 received_hup_signal = 1;
365 * We shouldn't be here, unless we catch signals
366 * in main() that we can't handle here!
368 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
376 /*********************************************************************
378 * Function : client_protocol_is_unsupported
380 * Description : Checks if the client used a known unsupported
381 * protocol and deals with it by sending an error
385 * 1 : csp = Current client state (buffers, headers, etc...)
386 * 2 : req = the first request line send by the client
388 * Returns : TRUE if an error response has been generated, or
389 * FALSE if the request doesn't look invalid.
391 *********************************************************************/
392 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
395 * If it's a FTP or gopher request, we don't support it.
397 * These checks are better than nothing, but they might
398 * not work in all configurations and some clients might
399 * have problems digesting the answer.
401 * They should, however, never cause more problems than
402 * Privoxy's old behaviour (returning the misleading HTML
405 * "Could not resolve http://(ftp|gopher)://example.org").
407 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
409 const char *response = NULL;
410 const char *protocol = NULL;
412 if (!strncmpic(req, "GET ftp://", 10))
414 response = FTP_RESPONSE;
419 response = GOPHER_RESPONSE;
422 log_error(LOG_LEVEL_ERROR,
423 "%s tried to use Privoxy as %s proxy: %s",
424 csp->ip_addr_str, protocol, req);
425 log_error(LOG_LEVEL_CLF,
426 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
428 write_socket(csp->cfd, response, strlen(response));
437 /*********************************************************************
439 * Function : get_request_destination_elsewhere
441 * Description : If the client's request was redirected into
442 * Privoxy without the client's knowledge,
443 * the request line lacks the destination host.
445 * This function tries to get it elsewhere,
446 * provided accept-intercepted-requests is enabled.
448 * "Elsewhere" currently only means "Host: header",
449 * but in the future we may ask the redirecting
450 * packet filter to look the destination up.
452 * If the destination stays unknown, an error
453 * response is send to the client and headers
454 * are freed so that chat() can return directly.
457 * 1 : csp = Current client state (buffers, headers, etc...)
458 * 2 : headers = a header list
460 * Returns : JB_ERR_OK if the destination is now known, or
461 * JB_ERR_PARSE if it isn't.
463 *********************************************************************/
464 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
468 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
470 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
471 " Privoxy isn't configured to accept intercepted requests.",
472 csp->ip_addr_str, csp->http->cmd);
473 /* XXX: Use correct size */
474 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
475 csp->ip_addr_str, csp->http->cmd);
477 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
478 destroy_list(headers);
482 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
484 #ifndef FEATURE_EXTENDED_HOST_PATTERNS
485 /* Split the domain we just got for pattern matching */
486 init_domain_components(csp->http);
493 /* We can't work without destination. Go spread the news.*/
495 req = list_to_text(headers);
497 /* XXX: Use correct size */
498 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
499 csp->ip_addr_str, csp->http->cmd);
500 log_error(LOG_LEVEL_ERROR,
501 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
502 csp->ip_addr_str, csp->http->cmd, req);
505 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
506 destroy_list(headers);
511 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
512 * to get the destination IP address, use it as host directly
513 * or do a reverse DNS lookup first.
518 /*********************************************************************
520 * Function : get_server_headers
522 * Description : Parses server headers in iob and fills them
523 * into csp->headers so that they can later be
527 * 1 : csp = Current client state (buffers, headers, etc...)
529 * Returns : JB_ERR_OK if everything went fine, or
530 * JB_ERR_PARSE if the headers were incomplete.
532 *********************************************************************/
533 static jb_err get_server_headers(struct client_state *csp)
535 int continue_hack_in_da_house = 0;
538 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
543 * continue hack in da house. Ignore the ending of
544 * this head and continue enlisting header lines.
545 * The reason is described below.
547 enlist(csp->headers, "");
548 continue_hack_in_da_house = 0;
551 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
554 * It's a bodyless continue response, don't
555 * stop header parsing after reaching its end.
557 * As a result Privoxy will concatenate the
558 * next response's head and parse and deliver
559 * the headers as if they belonged to one request.
561 * The client will separate them because of the
562 * empty line between them.
564 * XXX: What we're doing here is clearly against
565 * the intended purpose of the continue header,
566 * and under some conditions (HTTP/1.0 client request)
567 * it's a standard violation.
569 * Anyway, "sort of against the spec" is preferable
570 * to "always getting confused by Continue responses"
571 * (Privoxy's behaviour before this hack was added)
573 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
574 continue_hack_in_da_house = 1;
576 else if (*header == '\0')
579 * If the header is empty, but the Continue hack
580 * isn't active, we can assume that we reached the
581 * end of the buffer before we hit the end of the
584 * Inform the caller an let it decide how to handle it.
589 if (JB_ERR_MEMORY == enlist(csp->headers, header))
592 * XXX: Should we quit the request and return a
593 * out of memory error page instead?
595 log_error(LOG_LEVEL_ERROR,
596 "Out of memory while enlisting server headers. %s lost.",
606 /*********************************************************************
608 * Function : crunch_reason
610 * Description : Translates the crunch reason code into a string.
613 * 1 : rsp = a http_response
615 * Returns : A string with the crunch reason or an error description.
617 *********************************************************************/
618 static const char *crunch_reason(const struct http_response *rsp)
620 char * reason = NULL;
625 return "Internal error while searching for crunch reason";
630 case RSP_REASON_UNSUPPORTED:
631 reason = "Unsupported HTTP feature";
633 case RSP_REASON_BLOCKED:
636 case RSP_REASON_UNTRUSTED:
637 reason = "Untrusted";
639 case RSP_REASON_REDIRECTED:
640 reason = "Redirected";
642 case RSP_REASON_CGI_CALL:
645 case RSP_REASON_NO_SUCH_DOMAIN:
646 reason = "DNS failure";
648 case RSP_REASON_FORWARDING_FAILED:
649 reason = "Forwarding failed";
651 case RSP_REASON_CONNECT_FAILED:
652 reason = "Connection failure";
654 case RSP_REASON_OUT_OF_MEMORY:
655 reason = "Out of memory (may mask other reasons)";
657 case RSP_REASON_CONNECTION_TIMEOUT:
658 reason = "Connection timeout";
660 case RSP_REASON_NO_SERVER_DATA:
661 reason = "No server data received";
664 reason = "No reason recorded";
672 /*********************************************************************
674 * Function : send_crunch_response
676 * Description : Delivers already prepared response for
677 * intercepted requests, logs the interception
678 * and frees the response.
681 * 1 : csp = Current client state (buffers, headers, etc...)
682 * 1 : rsp = Fully prepared response. Will be freed on exit.
686 *********************************************************************/
687 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
689 const struct http_request *http = csp->http;
693 assert(rsp->head != NULL);
698 * Not supposed to happen. If it does
699 * anyway, treat it as an unknown error.
701 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
702 /* return code doesn't matter */
707 /* If rsp is still NULL, we have serious internal problems. */
708 log_error(LOG_LEVEL_FATAL,
709 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
713 * Extract the status code from the actual head
714 * that will be send to the client. It is the only
715 * way to get it right for all requests, including
716 * the fixed ones for out-of-memory problems.
718 * A head starts like this: 'HTTP/1.1 200...'
722 status_code[0] = rsp->head[9];
723 status_code[1] = rsp->head[10];
724 status_code[2] = rsp->head[11];
725 status_code[3] = '\0';
727 /* Log that the request was crunched and why. */
728 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
729 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %u",
730 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
732 /* Write the answer to the client */
733 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
734 || write_socket(csp->cfd, rsp->body, rsp->content_length))
736 /* There is nothing we can do about it. */
737 log_error(LOG_LEVEL_ERROR,
738 "Couldn't deliver the error message through client socket %d: %E",
742 /* Clean up and return */
743 if (cgi_error_memory() != rsp)
745 free_http_response(rsp);
752 /*********************************************************************
754 * Function : request_contains_null_bytes
756 * Description : Checks for NULL bytes in the request and sends
757 * an error message to the client if any were found.
759 * XXX: currently not used, see comment in chat().
762 * 1 : csp = Current client state (buffers, headers, etc...)
763 * 2 : buf = Data from the client's request to check.
764 * 3 : len = The data length.
766 * Returns : TRUE if the request contained one or more NULL bytes, or
769 *********************************************************************/
770 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
772 size_t c_len; /* Request lenght when treated as C string */
779 * Null byte(s) found. Log the request,
780 * return an error response and hang up.
782 size_t tmp_len = c_len;
787 * Replace NULL byte(s) with '°' characters
788 * so the request can be logged as string.
789 * XXX: Is there a better replacement character?
792 tmp_len += strlen(buf+tmp_len);
793 } while (tmp_len < len);
795 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
796 "(length=%d, strlen=%u).", csp->ip_addr_str, len, c_len);
797 log_error(LOG_LEVEL_HEADER,
798 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
800 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
802 /* XXX: Log correct size */
803 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
813 /*********************************************************************
815 * Function : crunch_response_triggered
817 * Description : Checks if the request has to be crunched,
818 * and delivers the crunch response if necessary.
821 * 1 : csp = Current client state (buffers, headers, etc...)
822 * 2 : crunchers = list of cruncher functions to run
824 * Returns : TRUE if the request was answered with a crunch response
827 *********************************************************************/
828 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
830 struct http_response *rsp = NULL;
831 const struct cruncher *c;
834 * If CGI request crunching is disabled,
835 * check the CGI dispatcher out of order to
836 * prevent unintentional blocks or redirects.
838 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
839 && (NULL != (rsp = dispatch_cgi(csp))))
841 /* Deliver, log and free the interception response. */
842 send_crunch_response(csp, rsp);
843 csp->flags |= CSP_FLAG_CRUNCHED;
847 for (c = crunchers; c->cruncher != NULL; c++)
850 * Check the cruncher if either Privoxy is toggled
851 * on and the request isn't forced, or if the cruncher
852 * applies to forced requests as well.
854 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
855 !(csp->flags & CSP_FLAG_FORCED)) ||
856 (c->flags & CF_IGNORE_FORCE))
858 rsp = c->cruncher(csp);
861 /* Deliver, log and free the interception response. */
862 send_crunch_response(csp, rsp);
863 csp->flags |= CSP_FLAG_CRUNCHED;
864 #ifdef FEATURE_STATISTICS
865 if (c->flags & CF_COUNT_AS_REJECT)
867 csp->flags |= CSP_FLAG_REJECTED;
869 #endif /* def FEATURE_STATISTICS */
880 /*********************************************************************
882 * Function : build_request_line
884 * Description : Builds the HTTP request line.
886 * If a HTTP forwarder is used it expects the whole URL,
887 * web servers only get the path.
890 * 1 : csp = Current client state (buffers, headers, etc...)
891 * 2 : fwd = The forwarding spec used for the request
892 * XXX: Should use http->fwd instead.
893 * 3 : request_line = The old request line which will be replaced.
895 * Returns : Nothing. Terminates in case of memory problems.
897 *********************************************************************/
898 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
900 struct http_request *http = csp->http;
902 assert(http->ssl == 0);
905 * Downgrade http version from 1.1 to 1.0
906 * if +downgrade action applies.
908 if ( (csp->action->flags & ACTION_DOWNGRADE)
909 && (!strcmpic(http->ver, "HTTP/1.1")))
912 http->ver = strdup("HTTP/1.0");
914 if (http->ver == NULL)
916 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
921 * Rebuild the request line.
923 freez(*request_line);
924 *request_line = strdup(http->gpc);
925 string_append(request_line, " ");
927 if (fwd->forward_host)
929 string_append(request_line, http->url);
933 string_append(request_line, http->path);
935 string_append(request_line, " ");
936 string_append(request_line, http->ver);
938 if (*request_line == NULL)
940 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
942 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
946 /*********************************************************************
948 * Function : change_request_destination
950 * Description : Parse a (rewritten) request line and regenerate
951 * the http request data.
954 * 1 : csp = Current client state (buffers, headers, etc...)
956 * Returns : Forwards the parse_http_request() return code.
957 * Terminates in case of memory problems.
959 *********************************************************************/
960 static jb_err change_request_destination(struct client_state *csp)
962 struct http_request *http = csp->http;
965 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
966 free_http_request(http);
967 err = parse_http_request(csp->headers->first->str, http);
968 if (JB_ERR_OK != err)
970 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
971 jb_err_to_string(err));
975 /* XXX: ocmd is a misleading name */
976 http->ocmd = strdup(http->cmd);
977 if (http->ocmd == NULL)
979 log_error(LOG_LEVEL_FATAL,
980 "Out of memory copying rewritten HTTP request line");
988 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
989 /*********************************************************************
991 * Function : server_response_is_complete
993 * Description : Determines whether we should stop reading
994 * from the server socket.
997 * 1 : csp = Current client state (buffers, headers, etc...)
998 * 2 : content_length = Length of content received so far.
1000 * Returns : TRUE if the response is complete,
1003 *********************************************************************/
1004 static int server_response_is_complete(struct client_state *csp,
1005 unsigned long long content_length)
1007 int content_length_known = !!(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
1009 if (!strcmpic(csp->http->gpc, "HEAD"))
1012 * "HEAD" implies no body, we are thus expecting
1013 * no content. XXX: incomplete "list" of methods?
1015 csp->expected_content_length = 0;
1016 content_length_known = TRUE;
1019 if (csp->http->status == 304)
1022 * Expect no body. XXX: incomplete "list" of status codes?
1024 csp->expected_content_length = 0;
1025 content_length_known = TRUE;
1028 return (content_length_known && ((0 == csp->expected_content_length)
1029 || (csp->expected_content_length <= content_length)));
1033 #ifdef FEATURE_CONNECTION_SHARING
1034 /*********************************************************************
1036 * Function : wait_for_alive_connections
1038 * Description : Waits for alive connections to timeout.
1044 *********************************************************************/
1045 static void wait_for_alive_connections(void)
1047 int connections_alive = close_unusable_connections();
1049 while (0 < connections_alive)
1051 log_error(LOG_LEVEL_CONNECT,
1052 "Waiting for %d connections to timeout.",
1055 connections_alive = close_unusable_connections();
1058 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
1061 #endif /* def FEATURE_CONNECTION_SHARING */
1064 /*********************************************************************
1066 * Function : save_connection_destination
1068 * Description : Remembers a connection for reuse later on.
1071 * 1 : sfd = Open socket to remember.
1072 * 2 : http = The destination for the connection.
1073 * 3 : fwd = The forwarder settings used.
1074 * 3 : server_connection = storage.
1078 *********************************************************************/
1079 void save_connection_destination(jb_socket sfd,
1080 const struct http_request *http,
1081 const struct forward_spec *fwd,
1082 struct reusable_connection *server_connection)
1084 assert(sfd != JB_INVALID_SOCKET);
1085 assert(NULL != http->host);
1087 server_connection->sfd = sfd;
1088 server_connection->host = strdup(http->host);
1089 if (NULL == server_connection->host)
1091 log_error(LOG_LEVEL_FATAL, "Out of memory saving socket.");
1093 server_connection->port = http->port;
1095 assert(NULL != fwd);
1096 assert(server_connection->gateway_host == NULL);
1097 assert(server_connection->gateway_port == 0);
1098 assert(server_connection->forwarder_type == 0);
1099 assert(server_connection->forward_host == NULL);
1100 assert(server_connection->forward_port == 0);
1102 server_connection->forwarder_type = fwd->type;
1103 if (NULL != fwd->gateway_host)
1105 server_connection->gateway_host = strdup(fwd->gateway_host);
1106 if (NULL == server_connection->gateway_host)
1108 log_error(LOG_LEVEL_FATAL, "Out of memory saving gateway_host.");
1113 server_connection->gateway_host = NULL;
1115 server_connection->gateway_port = fwd->gateway_port;
1117 if (NULL != fwd->forward_host)
1119 server_connection->forward_host = strdup(fwd->forward_host);
1120 if (NULL == server_connection->forward_host)
1122 log_error(LOG_LEVEL_FATAL, "Out of memory saving forward_host.");
1127 server_connection->forward_host = NULL;
1129 server_connection->forward_port = fwd->forward_port;
1133 /*********************************************************************
1135 * Function : verify_request_length
1137 * Description : Checks if we already got the whole client requests
1138 * and sets CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ if
1141 * Data that doesn't belong to the current request is
1142 * thrown away to let the client retry on a clean socket.
1144 * XXX: This is a hack until we can deal with multiple
1145 * pipelined requests at the same time.
1149 * 1 : csp = Current client state (buffers, headers, etc...)
1153 *********************************************************************/
1154 static void verify_request_length(struct client_state *csp)
1156 unsigned long long buffered_request_bytes =
1157 (unsigned long long)(csp->iob->eod - csp->iob->cur);
1159 if ((csp->expected_client_content_length != 0)
1160 && (buffered_request_bytes != 0))
1162 if (csp->expected_client_content_length >= buffered_request_bytes)
1164 csp->expected_client_content_length -= buffered_request_bytes;
1165 log_error(LOG_LEVEL_CONNECT, "Reduced expected bytes to %llu "
1166 "to account for the %llu ones we already got.",
1167 csp->expected_client_content_length, buffered_request_bytes);
1171 assert(csp->iob->eod > csp->iob->cur + csp->expected_client_content_length);
1172 csp->iob->eod = csp->iob->cur + csp->expected_client_content_length;
1173 log_error(LOG_LEVEL_CONNECT, "Reducing expected bytes to 0. "
1174 "Marking the server socket tainted after throwing %llu bytes away.",
1175 buffered_request_bytes - csp->expected_client_content_length);
1176 csp->expected_client_content_length = 0;
1177 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1180 if (csp->expected_client_content_length == 0)
1182 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1186 if (!(csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ)
1187 && ((csp->iob->cur[0] != '\0') || (csp->expected_client_content_length != 0)))
1189 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1190 if (strcmpic(csp->http->gpc, "GET")
1191 && strcmpic(csp->http->gpc, "HEAD")
1192 && strcmpic(csp->http->gpc, "TRACE")
1193 && strcmpic(csp->http->gpc, "OPTIONS")
1194 && strcmpic(csp->http->gpc, "DELETE"))
1196 /* XXX: this is an incomplete hack */
1197 csp->flags &= ~CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1198 log_error(LOG_LEVEL_CONNECT,
1199 "There might be a request body. The connection will not be kept alive.");
1203 /* XXX: and so is this */
1204 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1205 log_error(LOG_LEVEL_CONNECT,
1206 "Possible pipeline attempt detected. The connection will not "
1207 "be kept alive and we will only serve the first request.");
1208 /* Nuke the pipelined requests from orbit, just to be sure. */
1209 csp->iob->buf[0] = '\0';
1210 csp->iob->eod = csp->iob->cur = csp->iob->buf;
1215 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1216 log_error(LOG_LEVEL_CONNECT, "Complete client request received.");
1219 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1222 /*********************************************************************
1224 * Function : mark_server_socket_tainted
1226 * Description : Makes sure we don't reuse a server socket
1227 * (if we didn't read everything the server sent
1228 * us reusing the socket would lead to garbage).
1231 * 1 : csp = Current client state (buffers, headers, etc...)
1235 *********************************************************************/
1236 static void mark_server_socket_tainted(struct client_state *csp)
1238 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
1239 && !(csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED))
1241 log_error(LOG_LEVEL_CONNECT,
1242 "Marking the server socket %d tainted.",
1243 csp->server_connection.sfd);
1244 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1248 /*********************************************************************
1250 * Function : get_request_line
1252 * Description : Read the client request line.
1255 * 1 : csp = Current client state (buffers, headers, etc...)
1257 * Returns : Pointer to request line or NULL in case of errors.
1259 *********************************************************************/
1260 static char *get_request_line(struct client_state *csp)
1262 char buf[BUFFER_SIZE];
1263 char *request_line = NULL;
1266 memset(buf, 0, sizeof(buf));
1270 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1272 log_error(LOG_LEVEL_CONNECT,
1273 "Stopped waiting for the request line. Timeout: %d.",
1274 csp->config->socket_timeout);
1275 write_socket(csp->cfd, CLIENT_CONNECTION_TIMEOUT_RESPONSE,
1276 strlen(CLIENT_CONNECTION_TIMEOUT_RESPONSE));
1280 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1282 if (len <= 0) return NULL;
1285 * If there is no memory left for buffering the
1286 * request, there is nothing we can do but hang up
1288 if (add_to_iob(csp, buf, len))
1293 request_line = get_header(csp->iob);
1295 } while ((NULL != request_line) && ('\0' == *request_line));
1297 return request_line;
1302 /*********************************************************************
1304 * Function : receive_client_request
1306 * Description : Read the client's request (more precisely the
1307 * client headers) and answer it if necessary.
1309 * Note that since we're not using select() we could get
1310 * blocked here if a client connected, then didn't say
1314 * 1 : csp = Current client state (buffers, headers, etc...)
1316 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
1318 *********************************************************************/
1319 static jb_err receive_client_request(struct client_state *csp)
1321 char buf[BUFFER_SIZE];
1324 struct http_request *http;
1328 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1329 struct list header_list;
1330 struct list *headers = &header_list;
1334 memset(buf, 0, sizeof(buf));
1336 req = get_request_line(csp);
1339 mark_server_socket_tainted(csp);
1340 return JB_ERR_PARSE;
1342 assert(*req != '\0');
1344 if (client_protocol_is_unsupported(csp, req))
1346 return JB_ERR_PARSE;
1349 #ifdef FEATURE_FORCE_LOAD
1351 * If this request contains the FORCE_PREFIX and blocks
1352 * aren't enforced, get rid of it and set the force flag.
1354 if (strstr(req, FORCE_PREFIX))
1356 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
1358 log_error(LOG_LEVEL_FORCE,
1359 "Ignored force prefix in request: \"%s\".", req);
1363 strclean(req, FORCE_PREFIX);
1364 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
1365 csp->flags |= CSP_FLAG_FORCED;
1368 #endif /* def FEATURE_FORCE_LOAD */
1370 err = parse_http_request(req, http);
1372 if (JB_ERR_OK != err)
1374 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1375 /* XXX: Use correct size */
1376 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1377 log_error(LOG_LEVEL_ERROR,
1378 "Couldn't parse request line received from %s: %s",
1379 csp->ip_addr_str, jb_err_to_string(err));
1381 free_http_request(http);
1382 return JB_ERR_PARSE;
1385 /* grab the rest of the client's headers */
1389 p = get_header(csp->iob);
1393 /* There are no additional headers to read. */
1400 * We didn't receive a complete header
1401 * line yet, get the rest of it.
1403 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1405 log_error(LOG_LEVEL_ERROR,
1406 "Stopped grabbing the client headers.");
1407 destroy_list(headers);
1408 return JB_ERR_PARSE;
1411 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1414 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1415 destroy_list(headers);
1416 return JB_ERR_PARSE;
1419 if (add_to_iob(csp, buf, len))
1422 * If there is no memory left for buffering the
1423 * request, there is nothing we can do but hang up
1425 destroy_list(headers);
1426 return JB_ERR_MEMORY;
1432 * We were able to read a complete
1433 * header and can finaly enlist it.
1440 if (http->host == NULL)
1443 * If we still don't know the request destination,
1444 * the request is invalid or the client uses
1445 * Privoxy without its knowledge.
1447 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1450 * Our attempts to get the request destination
1451 * elsewhere failed or Privoxy is configured
1452 * to only accept proxy requests.
1454 * An error response has already been send
1455 * and we're done here.
1457 return JB_ERR_PARSE;
1462 * Determine the actions for this URL
1464 #ifdef FEATURE_TOGGLE
1465 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1467 /* Most compatible set of actions (i.e. none) */
1468 init_current_action(csp->action);
1471 #endif /* ndef FEATURE_TOGGLE */
1473 get_url_actions(csp, http);
1477 * Save a copy of the original request for logging
1479 http->ocmd = strdup(http->cmd);
1480 if (http->ocmd == NULL)
1482 log_error(LOG_LEVEL_FATAL,
1483 "Out of memory copying HTTP request line");
1485 enlist(csp->headers, http->cmd);
1487 /* Append the previously read headers */
1488 list_append_list_unique(csp->headers, headers);
1489 destroy_list(headers);
1496 /*********************************************************************
1498 * Function : parse_client_request
1500 * Description : Parses the client's request and decides what to do
1503 * Note that since we're not using select() we could get
1504 * blocked here if a client connected, then didn't say
1508 * 1 : csp = Current client state (buffers, headers, etc...)
1510 * Returns : JB_ERR_OK or JB_ERR_PARSE
1512 *********************************************************************/
1513 static jb_err parse_client_request(struct client_state *csp)
1515 struct http_request *http = csp->http;
1518 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1519 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
1520 && (!strcmpic(csp->http->ver, "HTTP/1.1"))
1521 && (csp->http->ssl == 0))
1523 /* Assume persistence until further notice */
1524 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
1526 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1528 err = sed(csp, FILTER_CLIENT_HEADERS);
1529 if (JB_ERR_OK != err)
1531 /* XXX: Should be handled in sed(). */
1532 assert(err == JB_ERR_PARSE);
1533 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
1535 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
1537 /* Check request line for rewrites. */
1538 if ((NULL == csp->headers->first->str)
1539 || (strcmp(http->cmd, csp->headers->first->str) &&
1540 (JB_ERR_OK != change_request_destination(csp))))
1543 * A header filter broke the request line - bail out.
1545 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
1546 /* XXX: Use correct size */
1547 log_error(LOG_LEVEL_CLF,
1548 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
1549 log_error(LOG_LEVEL_ERROR,
1550 "Invalid request line after applying header filters.");
1551 free_http_request(http);
1553 return JB_ERR_PARSE;
1556 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1557 if (csp->http->ssl == 0)
1559 verify_request_length(csp);
1561 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1568 /*********************************************************************
1572 * Description : Once a connection from the client has been accepted,
1573 * this function is called (via serve()) to handle the
1574 * main business of the communication. This function
1575 * returns after dealing with a single request. It can
1576 * be called multiple times witht the same client socket
1577 * if the client is keeping the connection alive.
1579 * The decision whether or not a client connection will
1580 * be kept alive is up to the caller which also must
1581 * close the client socket when done.
1583 * FIXME: chat is nearly thousand lines long.
1587 * 1 : csp = Current client state (buffers, headers, etc...)
1589 * Returns : Nothing.
1591 *********************************************************************/
1592 static void chat(struct client_state *csp)
1594 char buf[BUFFER_SIZE];
1601 int ms_iis5_hack = 0;
1602 unsigned long long byte_count = 0;
1603 int forwarded_connect_retries = 0;
1604 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1605 const struct forward_spec *fwd;
1606 struct http_request *http;
1607 long len = 0; /* for buffer sizes (and negative error codes) */
1609 /* Function that does the content filtering for the current request */
1610 filter_function_ptr content_filter = NULL;
1612 /* Skeleton for HTTP response, if we should intercept the request */
1613 struct http_response *rsp;
1614 struct timeval timeout;
1615 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1616 int watch_client_socket = 1;
1619 memset(buf, 0, sizeof(buf));
1623 if (receive_client_request(csp) != JB_ERR_OK)
1627 if (parse_client_request(csp) != JB_ERR_OK)
1632 /* decide how to route the HTTP request */
1633 fwd = forward_url(csp, http);
1636 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1637 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1642 * build the http request to send to the server
1643 * we have to do one of the following:
1645 * create = use the original HTTP request to create a new
1646 * HTTP request that has either the path component
1647 * without the http://domainspec (w/path) or the
1648 * full orininal URL (w/url)
1649 * Note that the path and/or the HTTP version may
1650 * have been altered by now.
1652 * connect = Open a socket to the host:port of the server
1653 * and short-circuit server and client socket.
1655 * pass = Pass the request unchanged if forwarding a CONNECT
1656 * request to a parent proxy. Note that we'll be sending
1657 * the CFAIL message ourselves if connecting to the parent
1658 * fails, but we won't send a CSUCCEED message if it works,
1659 * since that would result in a double message (ours and the
1660 * parent's). After sending the request to the parent, we simply
1663 * here's the matrix:
1666 * +--------+--------+
1668 * 0 | create | connect|
1670 * Forwarding +--------+--------+
1672 * 1 | create | pass |
1674 * +--------+--------+
1678 if (http->ssl && connect_port_is_forbidden(csp))
1680 const char *acceptable_connect_ports =
1681 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
1682 assert(NULL != acceptable_connect_ports);
1683 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
1684 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
1685 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
1686 csp->action->flags |= ACTION_BLOCK;
1692 freez(csp->headers->first->str);
1693 build_request_line(csp, fwd, &csp->headers->first->str);
1697 * We have a request. Check if one of the crunchers wants it.
1699 if (crunch_response_triggered(csp, crunchers_all))
1702 * Yes. The client got the crunch response
1703 * and we are done here after cleaning up.
1705 /* XXX: why list_remove_all()? */
1706 list_remove_all(csp->headers);
1711 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1713 if (fwd->forward_host)
1715 log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
1716 fwd->forward_host, fwd->forward_port, http->hostport);
1720 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1723 /* here we connect to the server, gateway, or the forwarder */
1725 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1726 if ((csp->server_connection.sfd != JB_INVALID_SOCKET)
1727 && socket_is_still_alive(csp->server_connection.sfd)
1728 && connection_destination_matches(&csp->server_connection, http, fwd))
1730 log_error(LOG_LEVEL_CONNECT,
1731 "Reusing server socket %u. Opened for %s.",
1732 csp->server_connection.sfd, csp->server_connection.host);
1736 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
1738 log_error(LOG_LEVEL_CONNECT,
1739 "Closing server socket %u. Opened for %s.",
1740 csp->server_connection.sfd, csp->server_connection.host);
1741 close_socket(csp->server_connection.sfd);
1742 mark_connection_closed(&csp->server_connection);
1744 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1746 while ((csp->server_connection.sfd = forwarded_connect(fwd, http, csp))
1747 && (errno == EINVAL)
1748 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1750 log_error(LOG_LEVEL_ERROR,
1751 "failed request #%u to connect to %s. Trying again.",
1752 forwarded_connect_retries, http->hostport);
1755 if (csp->server_connection.sfd == JB_INVALID_SOCKET)
1757 if (fwd->type != SOCKS_NONE)
1760 rsp = error_response(csp, "forwarding-failed");
1762 else if (errno == EINVAL)
1764 rsp = error_response(csp, "no-such-domain");
1768 rsp = error_response(csp, "connect-failed");
1769 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1773 /* Write the answer to the client */
1776 send_crunch_response(csp, rsp);
1781 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1782 save_connection_destination(csp->server_connection.sfd,
1783 http, fwd, &csp->server_connection);
1784 csp->server_connection.keep_alive_timeout =
1785 (unsigned)csp->config->keep_alive_timeout;
1787 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1789 hdr = list_to_text(csp->headers);
1792 /* FIXME Should handle error properly */
1793 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1795 list_remove_all(csp->headers);
1797 if (fwd->forward_host || (http->ssl == 0))
1800 * Write the client's (modified) header to the server
1801 * (along with anything else that may be in the buffer)
1803 if (write_socket(csp->server_connection.sfd, hdr, strlen(hdr))
1804 || (flush_socket(csp->server_connection.sfd, csp->iob) < 0))
1806 log_error(LOG_LEVEL_CONNECT,
1807 "write header to: %s failed: %E", http->hostport);
1809 rsp = error_response(csp, "connect-failed");
1812 send_crunch_response(csp, rsp);
1822 * We're running an SSL tunnel and we're not forwarding,
1823 * so just send the "connect succeeded" message to the
1824 * client, flush the rest, and get out of the way.
1826 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
1834 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
1836 csp->server_connection.request_sent = time(NULL);
1838 /* we're finished with the client's header */
1841 maxfd = (csp->cfd > csp->server_connection.sfd) ?
1842 csp->cfd : csp->server_connection.sfd;
1844 /* pass data between the client and server
1845 * until one or the other shuts down the connection.
1854 * FD_ZERO here seems to point to an errant macro which crashes.
1855 * So do this by hand for now...
1857 memset(&rfds,0x00,sizeof(fd_set));
1861 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1862 if (!watch_client_socket)
1864 maxfd = csp->server_connection.sfd;
1867 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1869 FD_SET(csp->cfd, &rfds);
1872 FD_SET(csp->server_connection.sfd, &rfds);
1874 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1875 if ((csp->flags & CSP_FLAG_CHUNKED)
1876 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
1877 && ((csp->iob->eod - csp->iob->cur) >= 5)
1878 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
1880 log_error(LOG_LEVEL_CONNECT,
1881 "Looks like we read the last chunk together with "
1882 "the server headers. We better stop reading.");
1883 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
1884 csp->expected_content_length = byte_count;
1885 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
1887 if (server_body && server_response_is_complete(csp, byte_count))
1889 if (csp->expected_content_length == byte_count)
1891 log_error(LOG_LEVEL_CONNECT,
1892 "Done reading from server. Content length: %llu as expected. "
1893 "Bytes most recently read: %d.",
1898 log_error(LOG_LEVEL_CONNECT,
1899 "Done reading from server. Expected content length: %llu. "
1900 "Actual content length: %llu. Bytes most recently read: %d.",
1901 csp->expected_content_length, byte_count, len);
1905 * XXX: should not jump around,
1906 * chat() is complicated enough already.
1910 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1912 timeout.tv_sec = csp->config->socket_timeout;
1913 timeout.tv_usec = 0;
1914 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
1918 log_error(LOG_LEVEL_ERROR,
1919 "Didn't receive data in time: %s", http->url);
1920 if ((byte_count == 0) && (http->ssl == 0))
1922 send_crunch_response(csp, error_response(csp, "connection-timeout"));
1924 mark_server_socket_tainted(csp);
1929 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1930 mark_server_socket_tainted(csp);
1935 * This is the body of the browser's request,
1936 * just read and write it.
1938 * XXX: Make sure the client doesn't use pipelining
1939 * behind Privoxy's back.
1941 if (FD_ISSET(csp->cfd, &rfds))
1943 int max_bytes_to_read = sizeof(buf) - 1;
1945 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1946 if ((csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
1948 if (data_is_available(csp->cfd, 0))
1951 * If the next request is already waiting, we have
1952 * to stop select()ing the client socket. Otherwise
1953 * we would always return right away and get nothing
1956 watch_client_socket = 0;
1957 log_error(LOG_LEVEL_CONNECT,
1958 "Stopping to watch the client socket. "
1959 "There's already another request waiting.");
1963 * If the client socket is set, but there's no data
1964 * available on the socket, the client went fishing
1965 * and continuing talking to the server makes no sense.
1967 log_error(LOG_LEVEL_CONNECT,
1968 "The client closed socket %d while "
1969 "the server socket %d is still open.",
1970 csp->cfd, csp->server_connection.sfd);
1971 mark_server_socket_tainted(csp);
1974 if (csp->expected_client_content_length != 0)
1976 if (csp->expected_client_content_length < (sizeof(buf) - 1))
1978 max_bytes_to_read = (int)csp->expected_client_content_length;
1980 log_error(LOG_LEVEL_CONNECT,
1981 "Waiting for up to %d bytes from the client.",
1984 assert(max_bytes_to_read < sizeof(buf));
1985 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1987 len = read_socket(csp->cfd, buf, max_bytes_to_read);
1991 /* XXX: not sure if this is necessary. */
1992 mark_server_socket_tainted(csp);
1993 break; /* "game over, man" */
1996 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1997 if (csp->expected_client_content_length != 0)
1999 assert(len <= max_bytes_to_read);
2000 csp->expected_client_content_length -= (unsigned)len;
2001 log_error(LOG_LEVEL_CONNECT,
2002 "Expected client content length set to %llu "
2003 "after reading %d bytes.",
2004 csp->expected_client_content_length, len);
2005 if (csp->expected_client_content_length == 0)
2007 log_error(LOG_LEVEL_CONNECT,
2008 "Done reading from the client.");
2009 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
2012 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2014 if (write_socket(csp->server_connection.sfd, buf, (size_t)len))
2016 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2017 mark_server_socket_tainted(csp);
2024 * The server wants to talk. It could be the header or the body.
2025 * If `hdr' is null, then it's the header otherwise it's the body.
2026 * FIXME: Does `hdr' really mean `host'? No.
2028 if (FD_ISSET(csp->server_connection.sfd, &rfds))
2030 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2031 if (!socket_is_still_alive(csp->cfd))
2034 log_error(LOG_LEVEL_CONNECT,
2035 "The server still wants to talk, but the client may already have hung up on us.");
2037 log_error(LOG_LEVEL_CONNECT,
2038 "The server still wants to talk, but the client hung up on us.");
2039 mark_server_socket_tainted(csp);
2041 #endif /* def _WIN32 */
2043 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2046 len = read_socket(csp->server_connection.sfd, buf, sizeof(buf) - 1);
2050 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2052 if (http->ssl && (fwd->forward_host == NULL))
2055 * Just hang up. We already confirmed the client's CONNECT
2056 * request with status code 200 and unencrypted content is
2057 * no longer welcome.
2059 log_error(LOG_LEVEL_ERROR,
2060 "CONNECT already confirmed. Unable to tell the client about the problem.");
2063 else if (byte_count)
2066 * Just hang up. We already transmitted the original headers
2067 * and parts of the original content and therefore missed the
2068 * chance to send an error message (without risking data corruption).
2070 * XXX: we could retry with a fancy range request here.
2072 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2073 "Unable to tell the client about the problem.");
2074 mark_server_socket_tainted(csp);
2078 * XXX: Consider handling the cases above the same.
2080 mark_server_socket_tainted(csp);
2084 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2085 if (csp->flags & CSP_FLAG_CHUNKED)
2087 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2089 /* XXX: this is a temporary hack */
2090 log_error(LOG_LEVEL_CONNECT,
2091 "Looks like we reached the end of the last chunk. "
2092 "We better stop reading.");
2093 csp->expected_content_length = byte_count + (unsigned long long)len;
2094 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2098 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2101 * Add a trailing zero to let be able to use string operations.
2102 * XXX: do we still need this with filter_popups gone?
2107 * Normally, this would indicate that we've read
2108 * as much as the server has sent us and we can
2109 * close the client connection. However, Microsoft
2110 * in its wisdom has released IIS/5 with a bug that
2111 * prevents it from sending the trailing \r\n in
2112 * a 302 redirect header (and possibly other headers).
2113 * To work around this if we've haven't parsed
2114 * a full header we'll append a trailing \r\n
2115 * and see if this now generates a valid one.
2117 * This hack shouldn't have any impacts. If we've
2118 * already transmitted the header or if this is a
2119 * SSL connection, then we won't bother with this
2120 * hack. So we only work on partially received
2121 * headers. If we append a \r\n and this still
2122 * doesn't generate a valid header, then we won't
2123 * transmit anything to the client.
2128 if (server_body || http->ssl)
2131 * If we have been buffering up the document,
2132 * now is the time to apply content modification
2133 * and send the result to the client.
2137 p = execute_content_filter(csp, content_filter);
2139 * If the content filter fails, use the original
2140 * buffer and length.
2141 * (see p != NULL ? p : csp->iob->cur below)
2145 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2148 if (JB_ERR_OK != update_server_headers(csp))
2150 log_error(LOG_LEVEL_FATAL,
2151 "Failed to update server headers. after filtering.");
2154 hdr = list_to_text(csp->headers);
2157 /* FIXME Should handle error properly */
2158 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2161 if (write_socket(csp->cfd, hdr, strlen(hdr))
2162 || write_socket(csp->cfd,
2163 ((p != NULL) ? p : csp->iob->cur), (size_t)csp->content_length))
2165 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2168 mark_server_socket_tainted(csp);
2176 break; /* "game over, man" */
2180 * This is NOT the body, so
2181 * Let's pretend the server just sent us a blank line.
2183 snprintf(buf, sizeof(buf), "\r\n");
2184 len = (int)strlen(buf);
2187 * Now, let the normal header parsing algorithm below do its
2188 * job. If it fails, we'll exit instead of continuing.
2195 * If this is an SSL connection or we're in the body
2196 * of the server document, just write it to the client,
2197 * unless we need to buffer the body for later content-filtering
2199 if (server_body || http->ssl)
2204 * If there is no memory left for buffering the content, or the buffer limit
2205 * has been reached, switch to non-filtering mode, i.e. make & write the
2206 * header, flush the iob and buf, and get out of the way.
2208 if (add_to_iob(csp, buf, len))
2213 log_error(LOG_LEVEL_INFO,
2214 "Flushing header and buffers. Stepping back from filtering.");
2216 hdr = list_to_text(csp->headers);
2220 * Memory is too tight to even generate the header.
2221 * Send our static "Out-of-memory" page.
2223 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2224 rsp = cgi_error_memory();
2225 send_crunch_response(csp, rsp);
2226 mark_server_socket_tainted(csp);
2229 hdrlen = strlen(hdr);
2231 if (write_socket(csp->cfd, hdr, hdrlen)
2232 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2233 || (write_socket(csp->cfd, buf, (size_t)len)))
2235 log_error(LOG_LEVEL_CONNECT,
2236 "Flush header and buffers to client failed: %E");
2238 mark_server_socket_tainted(csp);
2243 * Reset the byte_count to the amount of bytes
2244 * we just flushed. len will be added a few lines below,
2245 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2247 byte_count = (unsigned long long)flushed;
2249 content_filter = NULL;
2255 if (write_socket(csp->cfd, buf, (size_t)len))
2257 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2258 mark_server_socket_tainted(csp);
2262 byte_count += (unsigned long long)len;
2268 * We're still looking for the end of the server's header.
2269 * Buffer up the data we just read. If that fails, there's
2270 * little we can do but send our static out-of-memory page.
2272 if (add_to_iob(csp, buf, len))
2274 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2275 rsp = cgi_error_memory();
2276 send_crunch_response(csp, rsp);
2277 mark_server_socket_tainted(csp);
2281 /* Convert iob into something sed() can digest */
2282 if (JB_ERR_PARSE == get_server_headers(csp))
2287 * Well, we tried our MS IIS/5 hack and it didn't work.
2288 * The header is incomplete and there isn't anything
2289 * we can do about it.
2291 log_error(LOG_LEVEL_ERROR, "Invalid server headers. "
2292 "Applying the MS IIS5 hack didn't help.");
2293 log_error(LOG_LEVEL_CLF,
2294 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2295 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2296 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2297 mark_server_socket_tainted(csp);
2303 * Since we have to wait for more from the server before
2304 * we can parse the headers we just continue here.
2306 log_error(LOG_LEVEL_CONNECT,
2307 "Continuing buffering headers. Bytes most recently read: %d.",
2315 * Account for the content bytes we
2316 * might have gotten with the headers.
2318 assert(csp->iob->eod >= csp->iob->cur);
2319 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
2322 /* Did we actually get anything? */
2323 if (NULL == csp->headers->first)
2325 if ((csp->flags & CSP_FLAG_REUSED_CLIENT_CONNECTION))
2327 log_error(LOG_LEVEL_ERROR,
2328 "Empty server or forwarder response received on socket %d. "
2329 "Closing client socket %d without sending data.",
2330 csp->server_connection.sfd, csp->cfd);
2334 log_error(LOG_LEVEL_ERROR,
2335 "Empty server or forwarder response received on socket %d.",
2336 csp->server_connection.sfd);
2337 send_crunch_response(csp, error_response(csp, "no-server-data"));
2339 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2340 free_http_request(http);
2341 mark_server_socket_tainted(csp);
2345 assert(csp->headers->first->str);
2347 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
2348 strncmpic(csp->headers->first->str, "ICY", 3))
2351 * It doesn't look like a HTTP (or Shoutcast) response:
2352 * tell the client and log the problem.
2354 if (strlen(csp->headers->first->str) > 30)
2356 csp->headers->first->str[30] = '\0';
2358 log_error(LOG_LEVEL_ERROR,
2359 "Invalid server or forwarder response. Starts with: %s",
2360 csp->headers->first->str);
2361 log_error(LOG_LEVEL_CLF,
2362 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2363 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2364 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2365 free_http_request(http);
2366 mark_server_socket_tainted(csp);
2371 * We have now received the entire server header,
2372 * filter it and send the result to the client
2374 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
2376 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2378 hdr = list_to_text(csp->headers);
2381 /* FIXME Should handle error properly */
2382 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2385 csp->server_connection.response_received = time(NULL);
2387 if (crunch_response_triggered(csp, crunchers_light))
2390 * One of the tags created by a server-header
2391 * tagger triggered a crunch. We already
2392 * delivered the crunch response to the client
2393 * and are done here after cleaning up.
2396 mark_server_socket_tainted(csp);
2399 /* Buffer and pcrs filter this if appropriate. */
2401 if (!http->ssl) /* We talk plaintext */
2403 content_filter = get_filter_function(csp);
2406 * Only write if we're not buffering for content modification
2408 if (!content_filter)
2411 * Write the server's (modified) header to
2412 * the client (along with anything else that
2413 * may be in the buffer)
2416 if (write_socket(csp->cfd, hdr, strlen(hdr))
2417 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
2419 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2422 * The write failed, so don't bother mentioning it
2423 * to the client... it probably can't hear us anyway.
2426 mark_server_socket_tainted(csp);
2431 /* we're finished with the server's header */
2437 * If this was a MS IIS/5 hack then it means the server
2438 * has already closed the connection. Nothing more to read.
2443 log_error(LOG_LEVEL_ERROR,
2444 "Closed server connection detected. "
2445 "Applying the MS IIS5 hack didn't help.");
2446 log_error(LOG_LEVEL_CLF,
2447 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2448 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2449 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2450 mark_server_socket_tainted(csp);
2456 mark_server_socket_tainted(csp);
2457 return; /* huh? we should never get here */
2460 if (csp->content_length == 0)
2463 * If Privoxy didn't recalculate the Content-Lenght,
2464 * byte_count is still correct.
2466 csp->content_length = byte_count;
2469 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2470 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2471 && (csp->expected_content_length != byte_count))
2473 log_error(LOG_LEVEL_CONNECT,
2474 "Received %llu bytes while expecting %llu.",
2475 byte_count, csp->expected_content_length);
2476 mark_server_socket_tainted(csp);
2480 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
2481 csp->ip_addr_str, http->ocmd, csp->content_length);
2483 csp->server_connection.timestamp = time(NULL);
2487 /*********************************************************************
2491 * Description : This is little more than chat. We only "serve" to
2492 * to close (or remember) any socket that chat may have
2496 * 1 : csp = Current client state (buffers, headers, etc...)
2500 *********************************************************************/
2502 void serve(struct client_state *csp)
2503 #else /* ifndef AMIGA */
2504 static void serve(struct client_state *csp)
2505 #endif /* def AMIGA */
2507 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2508 #ifdef FEATURE_CONNECTION_SHARING
2509 static int monitor_thread_running = 0;
2510 #endif /* def FEATURE_CONNECTION_SHARING */
2511 int continue_chatting = 0;
2515 unsigned int latency;
2520 * If the request has been crunched,
2521 * the calculated latency is zero.
2523 latency = (unsigned)(csp->server_connection.response_received -
2524 csp->server_connection.request_sent) / 2;
2526 continue_chatting = (csp->config->feature_flags
2527 & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
2528 && (((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
2529 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED))
2530 || (csp->flags & CSP_FLAG_CRUNCHED))
2531 && (csp->cfd != JB_INVALID_SOCKET);
2533 if (continue_chatting && !(csp->flags & CSP_FLAG_CRUNCHED))
2535 continue_chatting = (csp->server_connection.sfd != JB_INVALID_SOCKET)
2536 && socket_is_still_alive(csp->server_connection.sfd);
2537 if (continue_chatting)
2539 if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
2541 csp->server_connection.keep_alive_timeout = csp->config->default_server_timeout;
2542 log_error(LOG_LEVEL_CONNECT,
2543 "The server didn't specify how long the connection will stay open. "
2544 "Assumed timeout is: %u.", csp->server_connection.keep_alive_timeout);
2546 continue_chatting = (latency < csp->server_connection.keep_alive_timeout);
2550 if (continue_chatting)
2552 unsigned int client_timeout;
2554 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2556 client_timeout = (unsigned)csp->server_connection.keep_alive_timeout - latency;
2557 log_error(LOG_LEVEL_CONNECT,
2558 "Waiting for the next client request on socket %d. "
2559 "Keeping the server socket %d to %s open.",
2560 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
2564 client_timeout = 1; /* XXX: Use something else here? */
2565 log_error(LOG_LEVEL_CONNECT,
2566 "Waiting for the next client request on socket %d. "
2567 "No server socket to keep open.", csp->cfd);
2569 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
2570 && data_is_available(csp->cfd, (int)client_timeout)
2571 && socket_is_still_alive(csp->cfd))
2573 log_error(LOG_LEVEL_CONNECT, "Client request arrived in "
2574 "time or the client closed the connection on socket %d.",
2577 * Get the csp in a mostly vergin state again.
2578 * XXX: Should be done elsewhere.
2580 csp->content_type = 0;
2581 csp->content_length = 0;
2582 csp->expected_content_length = 0;
2583 csp->expected_client_content_length = 0;
2584 list_remove_all(csp->headers);
2585 freez(csp->iob->buf);
2586 memset(csp->iob, 0, sizeof(csp->iob));
2587 freez(csp->error_message);
2588 free_http_request(csp->http);
2589 destroy_list(csp->headers);
2590 destroy_list(csp->tags);
2591 free_current_action(csp->action);
2592 if (NULL != csp->fwd)
2594 unload_forward_spec(csp->fwd);
2598 /* XXX: Store per-connection flags someplace else. */
2599 csp->flags = CSP_FLAG_ACTIVE |
2600 (csp->flags & CSP_FLAG_TOGGLED_ON) | CSP_FLAG_REUSED_CLIENT_CONNECTION;
2604 log_error(LOG_LEVEL_CONNECT,
2605 "No additional client request received in time on socket %d.",
2607 #ifdef FEATURE_CONNECTION_SHARING
2608 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
2609 && (socket_is_still_alive(csp->server_connection.sfd)))
2611 time_t time_open = time(NULL) - csp->server_connection.timestamp;
2613 if (csp->server_connection.keep_alive_timeout < time_open + latency)
2618 remember_connection(&csp->server_connection);
2619 csp->server_connection.sfd = JB_INVALID_SOCKET;
2620 close_socket(csp->cfd);
2621 csp->cfd = JB_INVALID_SOCKET;
2622 privoxy_mutex_lock(&connection_reuse_mutex);
2623 if (!monitor_thread_running)
2625 monitor_thread_running = 1;
2626 privoxy_mutex_unlock(&connection_reuse_mutex);
2627 wait_for_alive_connections();
2628 privoxy_mutex_lock(&connection_reuse_mutex);
2629 monitor_thread_running = 0;
2631 privoxy_mutex_unlock(&connection_reuse_mutex);
2633 #endif /* def FEATURE_CONNECTION_SHARING */
2637 else if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2639 log_error(LOG_LEVEL_CONNECT,
2640 "The connection on server socket %d to %s isn't reusable. "
2641 "Closing.", csp->server_connection.sfd, csp->server_connection.host);
2643 } while (continue_chatting);
2647 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2649 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2651 #ifdef FEATURE_CONNECTION_SHARING
2652 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
2654 forget_connection(csp->server_connection.sfd);
2656 #endif /* def FEATURE_CONNECTION_SHARING */
2657 close_socket(csp->server_connection.sfd);
2660 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2661 mark_connection_closed(&csp->server_connection);
2664 if (csp->cfd != JB_INVALID_SOCKET)
2666 close_socket(csp->cfd);
2669 csp->flags &= ~CSP_FLAG_ACTIVE;
2675 /*********************************************************************
2677 * Function : server_thread
2679 * Description : We only exist to call `serve' in a threaded environment.
2682 * 1 : data = Current client state (buffers, headers, etc...)
2684 * Returns : Always 0.
2686 *********************************************************************/
2687 static int32 server_thread(void *data)
2689 serve((struct client_state *) data);
2696 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2697 /*********************************************************************
2701 * Description : Print usage info & exit.
2703 * Parameters : Pointer to argv[0] for identifying ourselves
2707 *********************************************************************/
2708 static void usage(const char *myname)
2710 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2714 #endif /* defined(unix) */
2717 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
2718 #endif /* defined(unix) */
2719 "[--version] [configfile]\n"
2720 "Aborting\n", myname);
2725 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
2728 #ifdef MUTEX_LOCKS_AVAILABLE
2729 /*********************************************************************
2731 * Function : privoxy_mutex_lock
2733 * Description : Locks a mutex.
2736 * 1 : mutex = The mutex to lock.
2738 * Returns : Void. May exit in case of errors.
2740 *********************************************************************/
2741 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
2743 #ifdef FEATURE_PTHREAD
2744 int err = pthread_mutex_lock(mutex);
2747 if (mutex != &log_mutex)
2749 log_error(LOG_LEVEL_FATAL,
2750 "Mutex locking failed: %s.\n", strerror(err));
2755 EnterCriticalSection(mutex);
2756 #endif /* def FEATURE_PTHREAD */
2760 /*********************************************************************
2762 * Function : privoxy_mutex_unlock
2764 * Description : Unlocks a mutex.
2767 * 1 : mutex = The mutex to unlock.
2769 * Returns : Void. May exit in case of errors.
2771 *********************************************************************/
2772 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
2774 #ifdef FEATURE_PTHREAD
2775 int err = pthread_mutex_unlock(mutex);
2778 if (mutex != &log_mutex)
2780 log_error(LOG_LEVEL_FATAL,
2781 "Mutex unlocking failed: %s.\n", strerror(err));
2786 LeaveCriticalSection(mutex);
2787 #endif /* def FEATURE_PTHREAD */
2791 /*********************************************************************
2793 * Function : privoxy_mutex_init
2795 * Description : Prepares a mutex.
2798 * 1 : mutex = The mutex to initialize.
2800 * Returns : Void. May exit in case of errors.
2802 *********************************************************************/
2803 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
2805 #ifdef FEATURE_PTHREAD
2806 int err = pthread_mutex_init(mutex, 0);
2809 printf("Fatal error. Mutex initialization failed: %s.\n",
2814 InitializeCriticalSection(mutex);
2815 #endif /* def FEATURE_PTHREAD */
2817 #endif /* def MUTEX_LOCKS_AVAILABLE */
2819 /*********************************************************************
2821 * Function : initialize_mutexes
2823 * Description : Prepares mutexes if mutex support is available.
2827 * Returns : Void, exits in case of errors.
2829 *********************************************************************/
2830 static void initialize_mutexes(void)
2832 #ifdef MUTEX_LOCKS_AVAILABLE
2834 * Prepare global mutex semaphores
2836 privoxy_mutex_init(&log_mutex);
2837 privoxy_mutex_init(&log_init_mutex);
2838 privoxy_mutex_init(&connection_reuse_mutex);
2841 * XXX: The assumptions below are a bit naive
2842 * and can cause locks that aren't necessary.
2844 * For example older FreeBSD versions (< 6.x?)
2845 * have no gethostbyname_r, but gethostbyname is
2848 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
2849 privoxy_mutex_init(&resolver_mutex);
2850 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
2852 * XXX: should we use a single mutex for
2853 * localtime() and gmtime() as well?
2855 #ifndef HAVE_GMTIME_R
2856 privoxy_mutex_init(&gmtime_mutex);
2857 #endif /* ndef HAVE_GMTIME_R */
2859 #ifndef HAVE_LOCALTIME_R
2860 privoxy_mutex_init(&localtime_mutex);
2861 #endif /* ndef HAVE_GMTIME_R */
2864 privoxy_mutex_init(&rand_mutex);
2865 #endif /* ndef HAVE_RANDOM */
2866 #endif /* def MUTEX_LOCKS_AVAILABLE */
2870 /*********************************************************************
2874 * Description : Load the config file and start the listen loop.
2875 * This function is a lot more *sane* with the `load_config'
2876 * and `listen_loop' functions; although it stills does
2877 * a *little* too much for my taste.
2880 * 1 : argc = Number of parameters (including $0).
2881 * 2 : argv = Array of (char *)'s to the parameters.
2883 * Returns : 1 if : can't open config file, unrecognized directive,
2884 * stats requested in multi-thread mode, can't open the
2885 * log file, can't open the jar file, listen port is invalid,
2886 * any load fails, and can't bind port.
2888 * Else main never returns, the process must be signaled
2889 * to terminate execution. Or, on Windows, use the
2890 * "File", "Exit" menu option.
2892 *********************************************************************/
2894 int real_main(int argc, char **argv)
2896 int main(int argc, char **argv)
2900 unsigned int random_seed;
2902 struct passwd *pw = NULL;
2903 struct group *grp = NULL;
2906 char *pre_chroot_nslookup_to_load_resolver = NULL;
2913 #if !defined(_WIN32)
2920 /* Prepare mutexes if supported and necessary. */
2921 initialize_mutexes();
2923 /* Enable logging until further notice. */
2927 * Parse the command line arguments
2929 * XXX: simply printing usage information in case of
2930 * invalid arguments isn't particularly user friendly.
2932 while (++argc_pos < argc)
2935 /* Check to see if the service must be installed or uninstalled */
2936 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2938 const char *pName = argv[argc_pos] + 9;
2941 exit( (install_service(pName)) ? 0 : 1 );
2943 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2945 const char *pName = argv[argc_pos] + 11;
2948 exit((uninstall_service(pName)) ? 0 : 1);
2950 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2952 bRunAsService = TRUE;
2953 w32_set_service_cwd();
2954 atexit(w32_service_exit_notify);
2957 #endif /* defined(_WIN32) */
2960 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2962 if (strcmp(argv[argc_pos], "--help") == 0)
2967 else if(strcmp(argv[argc_pos], "--version") == 0)
2969 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2975 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2977 set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
2981 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2983 if (++argc_pos == argc) usage(argv[0]);
2984 pidfile = strdup(argv[argc_pos]);
2987 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2989 if (++argc_pos == argc) usage(argv[argc_pos]);
2991 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2994 if (NULL == (grp = getgrnam(p)))
2996 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3000 if (NULL == (pw = getpwnam(argv[argc_pos])))
3002 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3005 if (p != NULL) *--p = '\0';
3008 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3010 if (++argc_pos == argc) usage(argv[0]);
3011 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3014 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3018 #endif /* defined(unix) */
3020 else if (argc_pos + 1 != argc)
3023 * This is neither the last command line
3024 * option, nor was it recognized before,
3025 * therefore it must be invalid.
3031 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3033 configfile = argv[argc_pos];
3036 } /* -END- while (more arguments) */
3038 show_version(Argv[0]);
3041 if ( *configfile != '/' )
3043 char cwd[BUFFER_SIZE];
3045 size_t abs_file_size;
3047 /* make config-filename absolute here */
3048 if (NULL == getcwd(cwd, sizeof(cwd)))
3050 perror("failed to get current working directory");
3055 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3056 basedir = strdup(cwd);
3058 if (NULL == basedir ||
3059 NULL == (abs_file = malloc(abs_file_size)))
3061 perror("malloc failed");
3064 strlcpy(abs_file, basedir, abs_file_size);
3065 strlcat(abs_file, "/", abs_file_size );
3066 strlcat(abs_file, configfile, abs_file_size);
3067 configfile = abs_file;
3069 #endif /* defined unix */
3073 clients->next = NULL;
3075 /* XXX: factor out initialising after the next stable release. */
3078 #elif defined(_WIN32)
3082 random_seed = (unsigned int)time(NULL);
3084 srandom(random_seed);
3087 #endif /* ifdef HAVE_RANDOM */
3090 * Unix signal handling
3092 * Catch the abort, interrupt and terminate signals for a graceful exit
3093 * Catch the hangup signal so the errlog can be reopened.
3094 * Ignore the broken pipe signals (FIXME: Why?)
3096 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3099 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3100 const int ignored_signals[] = { SIGPIPE, 0 };
3102 for (idx = 0; catched_signals[idx] != 0; idx++)
3104 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3105 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3107 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3108 #endif /* ifdef sun */
3110 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3114 for (idx = 0; ignored_signals[idx] != 0; idx++)
3116 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3118 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3123 #else /* ifdef _WIN32 */
3124 # ifdef _WIN_CONSOLE
3126 * We *are* in a windows console app.
3127 * Print a verbose messages about FAQ's and such
3129 printf("%s", win32_blurb);
3130 # endif /* def _WIN_CONSOLE */
3131 #endif /* def _WIN32 */
3134 /* Initialize the CGI subsystem */
3135 cgi_init_error_messages();
3138 * If runnig on unix and without the --nodaemon
3139 * option, become a daemon. I.e. fork, detach
3140 * from tty and get process group leadership
3152 if ( pid < 0 ) /* error */
3157 else if ( pid != 0 ) /* parent */
3162 * must check for errors
3163 * child died due to missing files aso
3166 wpid = waitpid( pid, &status, WNOHANG );
3178 * stderr (fd 2) will be closed later on,
3179 * when the config file has been parsed.
3185 * Reserve fd 0 and 1 to prevent abort() and friends
3186 * from sending stuff to the clients or servers.
3188 fd = open("/dev/null", O_RDONLY);
3191 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
3195 if (dup2(fd, 0) == -1)
3197 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 0: %E");
3201 fd = open("/dev/null", O_WRONLY);
3204 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
3208 if (dup2(fd, 1) == -1)
3210 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 1: %E");
3217 } /* -END- if (daemon_mode) */
3220 * As soon as we have written the PID file, we can switch
3221 * to the user and group ID indicated by the --user option
3227 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3229 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3233 if (setgroups(1, &grp->gr_gid))
3235 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
3238 else if (initgroups(pw->pw_name, pw->pw_gid))
3240 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
3246 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3248 /* Read the time zone file from /etc before doing chroot. */
3250 if (NULL != pre_chroot_nslookup_to_load_resolver
3251 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3253 /* Initialize resolver library. */
3254 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3256 if (chroot(pw->pw_dir) < 0)
3258 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3262 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3265 if (setuid(pw->pw_uid))
3267 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3271 char putenv_dummy[64];
3273 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3274 if (putenv(putenv_dummy) != 0)
3276 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3279 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3280 if (putenv(putenv_dummy) != 0)
3282 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3288 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3291 #endif /* defined unix */
3294 /* This will be FALSE unless the command line specified --service
3298 /* Yup, so now we must attempt to establish a connection
3299 * with the service dispatcher. This will only work if this
3300 * process was launched by the service control manager to
3301 * actually run as a service. If this isn't the case, i've
3302 * known it take around 30 seconds or so for the call to return.
3305 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3306 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3308 /* Service has run, and at this point is now being stopped, so just return */
3313 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3315 /* An error occurred. Usually it's because --service was wrongly specified
3316 * and we were unable to connect to the Service Control Dispatcher because
3317 * it wasn't expecting us and is therefore not listening.
3319 * For now, just continue below to call the listen_loop function.
3322 #endif /* def _WIN32 */
3332 /*********************************************************************
3334 * Function : bind_port_helper
3336 * Description : Bind the listen port. Handles logging, and aborts
3340 * 1 : config = Privoxy configuration. Specifies port
3343 * Returns : Port that was opened.
3345 *********************************************************************/
3346 static jb_socket bind_port_helper(struct configuration_spec * config)
3351 if (config->haddr == NULL)
3353 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3358 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3359 config->hport, config->haddr);
3362 result = bind_port(config->haddr, config->hport, &bfd);
3369 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3370 "There may be another Privoxy or some other "
3371 "proxy running on port %d",
3372 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3373 config->hport, config->hport);
3376 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3377 "The hostname is not resolvable",
3378 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3381 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: %E",
3382 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3385 /* shouldn't get here */
3386 return JB_INVALID_SOCKET;
3389 config->need_bind = 0;
3396 /* Without this simple workaround we get this compiler warning from _beginthread
3397 * warning C4028: formal parameter 1 different from declaration
3399 void w32_service_listen_loop(void *p)
3403 #endif /* def _WIN32 */
3406 /*********************************************************************
3408 * Function : listen_loop
3410 * Description : bind the listen port and enter a "FOREVER" listening loop.
3416 *********************************************************************/
3417 static void listen_loop(void)
3419 struct client_state *csp = NULL;
3421 struct configuration_spec *config;
3422 unsigned int active_threads = 0;
3424 config = load_config();
3426 #ifdef FEATURE_CONNECTION_SHARING
3428 * XXX: Should be relocated once it no
3429 * longer needs to emit log messages.
3431 initialize_reusable_connections();
3432 #endif /* def FEATURE_CONNECTION_SHARING */
3434 bfd = bind_port_helper(config);
3436 #ifdef FEATURE_GRACEFUL_TERMINATION
3437 while (!g_terminate)
3442 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3443 while (waitpid(-1, NULL, WNOHANG) > 0)
3445 /* zombie children */
3447 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3450 * Free data that was used by died threads
3452 active_threads = sweep();
3456 * Re-open the errlog after HUP signal
3458 if (received_hup_signal)
3460 if (NULL != config->logfile)
3462 init_error_log(Argv[0], config->logfile);
3464 received_hup_signal = 0;
3468 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3470 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3474 csp->flags |= CSP_FLAG_ACTIVE;
3475 csp->server_connection.sfd = JB_INVALID_SOCKET;
3477 csp->config = config = load_config();
3479 if ( config->need_bind )
3482 * Since we were listening to the "old port", we will not see
3483 * a "listen" param change until the next request. So, at
3484 * least 1 more request must be made for us to find the new
3485 * setting. I am simply closing the old socket and binding the
3488 * Which-ever is correct, we will serve 1 more page via the
3489 * old settings. This should probably be a "show-proxy-args"
3490 * request. This should not be a so common of an operation
3491 * that this will hurt people's feelings.
3496 bfd = bind_port_helper(config);
3499 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3501 if (!accept_connection(csp, bfd))
3503 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3516 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3519 #ifdef FEATURE_TOGGLE
3520 if (global_toggle_state)
3521 #endif /* def FEATURE_TOGGLE */
3523 csp->flags |= CSP_FLAG_TOGGLED_ON;
3526 if (run_loader(csp))
3528 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3529 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3533 if (block_acl(NULL,csp))
3535 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
3536 close_socket(csp->cfd);
3537 freez(csp->ip_addr_str);
3541 #endif /* def FEATURE_ACL */
3543 if ((0 != config->max_client_connections)
3544 && (active_threads >= config->max_client_connections))
3546 log_error(LOG_LEVEL_CONNECT,
3547 "Rejecting connection from %s. Maximum number of connections reached.",
3549 write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
3550 strlen(TOO_MANY_CONNECTIONS_RESPONSE));
3551 close_socket(csp->cfd);
3552 freez(csp->ip_addr_str);
3557 /* add it to the list of clients */
3558 csp->next = clients->next;
3559 clients->next = csp;
3561 if (config->multi_threaded)
3565 /* this is a switch () statment in the C preprocessor - ugh */
3566 #undef SELECTED_ONE_OPTION
3568 /* Use Pthreads in preference to native code */
3569 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3570 #define SELECTED_ONE_OPTION
3572 pthread_t the_thread;
3573 pthread_attr_t attrs;
3575 pthread_attr_init(&attrs);
3576 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3577 errno = pthread_create(&the_thread, &attrs,
3578 (void * (*)(void *))serve, csp);
3579 child_id = errno ? -1 : 0;
3580 pthread_attr_destroy(&attrs);
3584 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3585 #define SELECTED_ONE_OPTION
3586 child_id = _beginthread(
3587 (void (*)(void *))serve,
3592 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3593 #define SELECTED_ONE_OPTION
3594 child_id = _beginthread(
3595 (void(* _Optlink)(void*))serve,
3601 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3602 #define SELECTED_ONE_OPTION
3604 thread_id tid = spawn_thread
3605 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3607 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3609 child_id = (int) tid;
3618 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3619 #define SELECTED_ONE_OPTION
3620 csp->cfd = ReleaseSocket(csp->cfd, -1);
3623 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3624 NP_Output, Output(),
3625 NP_CloseOutput, FALSE,
3626 NP_Name, (ULONG)"privoxy child",
3630 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3631 NP_Output, Output(),
3632 NP_CloseOutput, FALSE,
3633 NP_Name, (ULONG)"privoxy child",
3634 NP_StackSize, 200*1024,
3640 ((struct Task *)child_id)->tc_UserData = csp;
3641 Signal((struct Task *)child_id, SIGF_SINGLE);
3646 #if !defined(SELECTED_ONE_OPTION)
3649 /* This block is only needed when using fork().
3650 * When using threads, the server thread was
3651 * created and run by the call to _beginthread().
3653 if (child_id == 0) /* child */
3656 #ifdef FEATURE_TOGGLE
3657 int inherited_toggle_state = global_toggle_state;
3658 #endif /* def FEATURE_TOGGLE */
3663 * If we've been toggled or we've blocked the request, tell Mom
3666 #ifdef FEATURE_TOGGLE
3667 if (inherited_toggle_state != global_toggle_state)
3669 rc |= RC_FLAG_TOGGLED;
3671 #endif /* def FEATURE_TOGGLE */
3673 #ifdef FEATURE_STATISTICS
3674 if (csp->flags & CSP_FLAG_REJECTED)
3676 rc |= RC_FLAG_BLOCKED;
3678 #endif /* ndef FEATURE_STATISTICS */
3682 else if (child_id > 0) /* parent */
3684 /* in a fork()'d environment, the parent's
3685 * copy of the client socket and the CSP
3689 #if !defined(_WIN32) && !defined(__CYGWIN__)
3691 wait( &child_status );
3694 * Evaluate child's return code: If the child has
3695 * - been toggled, toggle ourselves
3696 * - blocked its request, bump up the stats counter
3699 #ifdef FEATURE_TOGGLE
3700 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
3702 global_toggle_state = !global_toggle_state;
3704 #endif /* def FEATURE_TOGGLE */
3706 #ifdef FEATURE_STATISTICS
3708 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
3712 #endif /* def FEATURE_STATISTICS */
3714 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
3715 close_socket(csp->cfd);
3716 csp->flags &= ~CSP_FLAG_ACTIVE;
3720 #undef SELECTED_ONE_OPTION
3721 /* end of cpp switch () */
3726 * Spawning the child failed, assume it's because
3727 * there are too many children running already.
3728 * XXX: If you assume ...
3730 log_error(LOG_LEVEL_ERROR,
3731 "Unable to take any additional connections: %E");
3732 write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
3733 strlen(TOO_MANY_CONNECTIONS_RESPONSE));
3734 close_socket(csp->cfd);
3735 csp->flags &= ~CSP_FLAG_ACTIVE;
3744 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
3746 /* Clean up. Aim: free all memory (no leaks) */
3747 #ifdef FEATURE_GRACEFUL_TERMINATION
3749 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
3751 unload_current_config_file();
3752 unload_current_actions_file();
3753 unload_current_re_filterfile();
3754 #ifdef FEATURE_TRUST
3755 unload_current_trust_file();
3758 if (config->multi_threaded)
3765 } while ((clients->next != NULL) && (--i > 0));
3769 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
3780 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
3781 /* Cleanup - remove taskbar icon etc. */
3786 #endif /* FEATURE_GRACEFUL_TERMINATION */