1 const char jcc_rcs[] = "$Id: jcc.c,v 1.313 2010/04/03 13:21:30 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) 2001-2009 the SourceForge
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);
846 for (c = crunchers; c->cruncher != NULL; c++)
849 * Check the cruncher if either Privoxy is toggled
850 * on and the request isn't forced, or if the cruncher
851 * applies to forced requests as well.
853 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
854 !(csp->flags & CSP_FLAG_FORCED)) ||
855 (c->flags & CF_IGNORE_FORCE))
857 rsp = c->cruncher(csp);
860 /* Deliver, log and free the interception response. */
861 send_crunch_response(csp, rsp);
862 #ifdef FEATURE_STATISTICS
863 if (c->flags & CF_COUNT_AS_REJECT)
865 csp->flags |= CSP_FLAG_REJECTED;
867 #endif /* def FEATURE_STATISTICS */
878 /*********************************************************************
880 * Function : build_request_line
882 * Description : Builds the HTTP request line.
884 * If a HTTP forwarder is used it expects the whole URL,
885 * web servers only get the path.
888 * 1 : csp = Current client state (buffers, headers, etc...)
889 * 2 : fwd = The forwarding spec used for the request
890 * XXX: Should use http->fwd instead.
891 * 3 : request_line = The old request line which will be replaced.
893 * Returns : Nothing. Terminates in case of memory problems.
895 *********************************************************************/
896 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
898 struct http_request *http = csp->http;
900 assert(http->ssl == 0);
903 * Downgrade http version from 1.1 to 1.0
904 * if +downgrade action applies.
906 if ( (csp->action->flags & ACTION_DOWNGRADE)
907 && (!strcmpic(http->ver, "HTTP/1.1")))
910 http->ver = strdup("HTTP/1.0");
912 if (http->ver == NULL)
914 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
919 * Rebuild the request line.
921 freez(*request_line);
922 *request_line = strdup(http->gpc);
923 string_append(request_line, " ");
925 if (fwd->forward_host)
927 string_append(request_line, http->url);
931 string_append(request_line, http->path);
933 string_append(request_line, " ");
934 string_append(request_line, http->ver);
936 if (*request_line == NULL)
938 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
940 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
944 /*********************************************************************
946 * Function : change_request_destination
948 * Description : Parse a (rewritten) request line and regenerate
949 * the http request data.
952 * 1 : csp = Current client state (buffers, headers, etc...)
954 * Returns : Forwards the parse_http_request() return code.
955 * Terminates in case of memory problems.
957 *********************************************************************/
958 static jb_err change_request_destination(struct client_state *csp)
960 struct http_request *http = csp->http;
963 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
964 free_http_request(http);
965 err = parse_http_request(csp->headers->first->str, http);
966 if (JB_ERR_OK != err)
968 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
969 jb_err_to_string(err));
973 /* XXX: ocmd is a misleading name */
974 http->ocmd = strdup(http->cmd);
975 if (http->ocmd == NULL)
977 log_error(LOG_LEVEL_FATAL,
978 "Out of memory copying rewritten HTTP request line");
986 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
987 /*********************************************************************
989 * Function : server_response_is_complete
991 * Description : Determines whether we should stop reading
992 * from the server socket.
995 * 1 : csp = Current client state (buffers, headers, etc...)
996 * 2 : content_length = Length of content received so far.
998 * Returns : TRUE if the response is complete,
1001 *********************************************************************/
1002 static int server_response_is_complete(struct client_state *csp,
1003 unsigned long long content_length)
1005 int content_length_known = !!(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
1007 if (!strcmpic(csp->http->gpc, "HEAD"))
1010 * "HEAD" implies no body, we are thus expecting
1011 * no content. XXX: incomplete "list" of methods?
1013 csp->expected_content_length = 0;
1014 content_length_known = TRUE;
1017 if (csp->http->status == 304)
1020 * Expect no body. XXX: incomplete "list" of status codes?
1022 csp->expected_content_length = 0;
1023 content_length_known = TRUE;
1026 return (content_length_known && ((0 == csp->expected_content_length)
1027 || (csp->expected_content_length <= content_length)));
1031 #ifdef FEATURE_CONNECTION_SHARING
1032 /*********************************************************************
1034 * Function : wait_for_alive_connections
1036 * Description : Waits for alive connections to timeout.
1042 *********************************************************************/
1043 static void wait_for_alive_connections(void)
1045 int connections_alive = close_unusable_connections();
1047 while (0 < connections_alive)
1049 log_error(LOG_LEVEL_CONNECT,
1050 "Waiting for %d connections to timeout.",
1053 connections_alive = close_unusable_connections();
1056 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
1059 #endif /* def FEATURE_CONNECTION_SHARING */
1062 /*********************************************************************
1064 * Function : save_connection_destination
1066 * Description : Remembers a connection for reuse later on.
1069 * 1 : sfd = Open socket to remember.
1070 * 2 : http = The destination for the connection.
1071 * 3 : fwd = The forwarder settings used.
1072 * 3 : server_connection = storage.
1076 *********************************************************************/
1077 void save_connection_destination(jb_socket sfd,
1078 const struct http_request *http,
1079 const struct forward_spec *fwd,
1080 struct reusable_connection *server_connection)
1082 assert(sfd != JB_INVALID_SOCKET);
1083 assert(NULL != http->host);
1085 server_connection->sfd = sfd;
1086 server_connection->host = strdup(http->host);
1087 if (NULL == server_connection->host)
1089 log_error(LOG_LEVEL_FATAL, "Out of memory saving socket.");
1091 server_connection->port = http->port;
1093 assert(NULL != fwd);
1094 assert(server_connection->gateway_host == NULL);
1095 assert(server_connection->gateway_port == 0);
1096 assert(server_connection->forwarder_type == 0);
1097 assert(server_connection->forward_host == NULL);
1098 assert(server_connection->forward_port == 0);
1100 server_connection->forwarder_type = fwd->type;
1101 if (NULL != fwd->gateway_host)
1103 server_connection->gateway_host = strdup(fwd->gateway_host);
1104 if (NULL == server_connection->gateway_host)
1106 log_error(LOG_LEVEL_FATAL, "Out of memory saving gateway_host.");
1111 server_connection->gateway_host = NULL;
1113 server_connection->gateway_port = fwd->gateway_port;
1115 if (NULL != fwd->forward_host)
1117 server_connection->forward_host = strdup(fwd->forward_host);
1118 if (NULL == server_connection->forward_host)
1120 log_error(LOG_LEVEL_FATAL, "Out of memory saving forward_host.");
1125 server_connection->forward_host = NULL;
1127 server_connection->forward_port = fwd->forward_port;
1131 /*********************************************************************
1133 * Function : verify_request_length
1135 * Description : Checks if we already got the whole client requests
1136 * and sets CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ if
1139 * Data that doesn't belong to the current request is
1140 * thrown away to let the client retry on a clean socket.
1142 * XXX: This is a hack until we can deal with multiple
1143 * pipelined requests at the same time.
1147 * 1 : csp = Current client state (buffers, headers, etc...)
1151 *********************************************************************/
1152 static void verify_request_length(struct client_state *csp)
1154 unsigned long long buffered_request_bytes =
1155 (unsigned long long)(csp->iob->eod - csp->iob->cur);
1157 if ((csp->expected_client_content_length != 0)
1158 && (buffered_request_bytes != 0))
1160 if (csp->expected_client_content_length >= buffered_request_bytes)
1162 csp->expected_client_content_length -= buffered_request_bytes;
1163 log_error(LOG_LEVEL_CONNECT, "Reduced expected bytes to %llu "
1164 "to account for the %llu ones we already got.",
1165 csp->expected_client_content_length, buffered_request_bytes);
1169 assert(csp->iob->eod > csp->iob->cur + csp->expected_client_content_length);
1170 csp->iob->eod = csp->iob->cur + csp->expected_client_content_length;
1171 log_error(LOG_LEVEL_CONNECT, "Reducing expected bytes to 0. "
1172 "Marking the server socket tainted after throwing %llu bytes away.",
1173 buffered_request_bytes - csp->expected_client_content_length);
1174 csp->expected_client_content_length = 0;
1175 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1178 if (csp->expected_client_content_length == 0)
1180 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1184 if (!(csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ)
1185 && ((csp->iob->cur[0] != '\0') || (csp->expected_client_content_length != 0)))
1187 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1188 if (strcmpic(csp->http->gpc, "GET")
1189 && strcmpic(csp->http->gpc, "HEAD")
1190 && strcmpic(csp->http->gpc, "TRACE")
1191 && strcmpic(csp->http->gpc, "OPTIONS")
1192 && strcmpic(csp->http->gpc, "DELETE"))
1194 /* XXX: this is an incomplete hack */
1195 csp->flags &= ~CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1196 log_error(LOG_LEVEL_CONNECT,
1197 "There might be a request body. The connection will not be kept alive.");
1201 /* XXX: and so is this */
1202 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1203 log_error(LOG_LEVEL_CONNECT,
1204 "Possible pipeline attempt detected. The connection will not "
1205 "be kept alive and we will only serve the first request.");
1206 /* Nuke the pipelined requests from orbit, just to be sure. */
1207 csp->iob->buf[0] = '\0';
1208 csp->iob->eod = csp->iob->cur = csp->iob->buf;
1213 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1214 log_error(LOG_LEVEL_CONNECT, "Complete client request received.");
1217 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1220 /*********************************************************************
1222 * Function : mark_server_socket_tainted
1224 * Description : Makes sure we don't reuse a server socket
1225 * (if we didn't read everything the server sent
1226 * us reusing the socket would lead to garbage).
1229 * 1 : csp = Current client state (buffers, headers, etc...)
1233 *********************************************************************/
1234 static void mark_server_socket_tainted(struct client_state *csp)
1236 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
1237 && !(csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED))
1239 log_error(LOG_LEVEL_CONNECT,
1240 "Marking the server socket %d tainted.",
1241 csp->server_connection.sfd);
1242 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1246 /*********************************************************************
1248 * Function : get_request_line
1250 * Description : Read the client request line.
1253 * 1 : csp = Current client state (buffers, headers, etc...)
1255 * Returns : Pointer to request line or NULL in case of errors.
1257 *********************************************************************/
1258 static char *get_request_line(struct client_state *csp)
1260 char buf[BUFFER_SIZE];
1261 char *request_line = NULL;
1264 memset(buf, 0, sizeof(buf));
1268 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1270 log_error(LOG_LEVEL_CONNECT,
1271 "Stopped waiting for the request line. Timeout: %d.",
1272 csp->config->socket_timeout);
1273 write_socket(csp->cfd, CLIENT_CONNECTION_TIMEOUT_RESPONSE,
1274 strlen(CLIENT_CONNECTION_TIMEOUT_RESPONSE));
1278 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1280 if (len <= 0) return NULL;
1283 * If there is no memory left for buffering the
1284 * request, there is nothing we can do but hang up
1286 if (add_to_iob(csp, buf, len))
1291 request_line = get_header(csp->iob);
1293 } while ((NULL != request_line) && ('\0' == *request_line));
1295 return request_line;
1300 /*********************************************************************
1302 * Function : receive_client_request
1304 * Description : Read the client's request (more precisely the
1305 * client headers) and answer it if necessary.
1307 * Note that since we're not using select() we could get
1308 * blocked here if a client connected, then didn't say
1312 * 1 : csp = Current client state (buffers, headers, etc...)
1314 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
1316 *********************************************************************/
1317 static jb_err receive_client_request(struct client_state *csp)
1319 char buf[BUFFER_SIZE];
1322 struct http_request *http;
1326 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1327 struct list header_list;
1328 struct list *headers = &header_list;
1332 memset(buf, 0, sizeof(buf));
1334 req = get_request_line(csp);
1337 mark_server_socket_tainted(csp);
1338 return JB_ERR_PARSE;
1340 assert(*req != '\0');
1342 if (client_protocol_is_unsupported(csp, req))
1344 return JB_ERR_PARSE;
1347 #ifdef FEATURE_FORCE_LOAD
1349 * If this request contains the FORCE_PREFIX and blocks
1350 * aren't enforced, get rid of it and set the force flag.
1352 if (strstr(req, FORCE_PREFIX))
1354 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
1356 log_error(LOG_LEVEL_FORCE,
1357 "Ignored force prefix in request: \"%s\".", req);
1361 strclean(req, FORCE_PREFIX);
1362 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
1363 csp->flags |= CSP_FLAG_FORCED;
1366 #endif /* def FEATURE_FORCE_LOAD */
1368 err = parse_http_request(req, http);
1370 if (JB_ERR_OK != err)
1372 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1373 /* XXX: Use correct size */
1374 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1375 log_error(LOG_LEVEL_ERROR,
1376 "Couldn't parse request line received from %s: %s",
1377 csp->ip_addr_str, jb_err_to_string(err));
1379 free_http_request(http);
1380 return JB_ERR_PARSE;
1383 /* grab the rest of the client's headers */
1387 p = get_header(csp->iob);
1391 /* There are no additional headers to read. */
1398 * We didn't receive a complete header
1399 * line yet, get the rest of it.
1401 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1403 log_error(LOG_LEVEL_ERROR,
1404 "Stopped grabbing the client headers.");
1405 destroy_list(headers);
1406 return JB_ERR_PARSE;
1409 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1412 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1413 destroy_list(headers);
1414 return JB_ERR_PARSE;
1417 if (add_to_iob(csp, buf, len))
1420 * If there is no memory left for buffering the
1421 * request, there is nothing we can do but hang up
1423 destroy_list(headers);
1424 return JB_ERR_MEMORY;
1430 * We were able to read a complete
1431 * header and can finaly enlist it.
1438 if (http->host == NULL)
1441 * If we still don't know the request destination,
1442 * the request is invalid or the client uses
1443 * Privoxy without its knowledge.
1445 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1448 * Our attempts to get the request destination
1449 * elsewhere failed or Privoxy is configured
1450 * to only accept proxy requests.
1452 * An error response has already been send
1453 * and we're done here.
1455 return JB_ERR_PARSE;
1460 * Determine the actions for this URL
1462 #ifdef FEATURE_TOGGLE
1463 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1465 /* Most compatible set of actions (i.e. none) */
1466 init_current_action(csp->action);
1469 #endif /* ndef FEATURE_TOGGLE */
1471 get_url_actions(csp, http);
1475 * Save a copy of the original request for logging
1477 http->ocmd = strdup(http->cmd);
1478 if (http->ocmd == NULL)
1480 log_error(LOG_LEVEL_FATAL,
1481 "Out of memory copying HTTP request line");
1483 enlist(csp->headers, http->cmd);
1485 /* Append the previously read headers */
1486 list_append_list_unique(csp->headers, headers);
1487 destroy_list(headers);
1494 /*********************************************************************
1496 * Function : parse_client_request
1498 * Description : Parses the client's request and decides what to do
1501 * Note that since we're not using select() we could get
1502 * blocked here if a client connected, then didn't say
1506 * 1 : csp = Current client state (buffers, headers, etc...)
1508 * Returns : JB_ERR_OK or JB_ERR_PARSE
1510 *********************************************************************/
1511 static jb_err parse_client_request(struct client_state *csp)
1513 struct http_request *http = csp->http;
1516 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1517 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
1518 && (!strcmpic(csp->http->ver, "HTTP/1.1"))
1519 && (csp->http->ssl == 0))
1521 /* Assume persistence until further notice */
1522 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
1524 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1526 err = sed(csp, FILTER_CLIENT_HEADERS);
1527 if (JB_ERR_OK != err)
1529 /* XXX: Should be handled in sed(). */
1530 assert(err == JB_ERR_PARSE);
1531 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
1533 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
1535 /* Check request line for rewrites. */
1536 if ((NULL == csp->headers->first->str)
1537 || (strcmp(http->cmd, csp->headers->first->str) &&
1538 (JB_ERR_OK != change_request_destination(csp))))
1541 * A header filter broke the request line - bail out.
1543 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
1544 /* XXX: Use correct size */
1545 log_error(LOG_LEVEL_CLF,
1546 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
1547 log_error(LOG_LEVEL_ERROR,
1548 "Invalid request line after applying header filters.");
1549 free_http_request(http);
1551 return JB_ERR_PARSE;
1554 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1555 if (csp->http->ssl == 0)
1557 verify_request_length(csp);
1559 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1566 /*********************************************************************
1570 * Description : Once a connection from the client has been accepted,
1571 * this function is called (via serve()) to handle the
1572 * main business of the communication. This function
1573 * returns after dealing with a single request. It can
1574 * be called multiple times witht the same client socket
1575 * if the client is keeping the connection alive.
1577 * The decision whether or not a client connection will
1578 * be kept alive is up to the caller which also must
1579 * close the client socket when done.
1581 * FIXME: chat is nearly thousand lines long.
1585 * 1 : csp = Current client state (buffers, headers, etc...)
1587 * Returns : Nothing.
1589 *********************************************************************/
1590 static void chat(struct client_state *csp)
1592 char buf[BUFFER_SIZE];
1599 int ms_iis5_hack = 0;
1600 unsigned long long byte_count = 0;
1601 int forwarded_connect_retries = 0;
1602 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1603 const struct forward_spec *fwd;
1604 struct http_request *http;
1605 long len = 0; /* for buffer sizes (and negative error codes) */
1607 /* Function that does the content filtering for the current request */
1608 filter_function_ptr content_filter = NULL;
1610 /* Skeleton for HTTP response, if we should intercept the request */
1611 struct http_response *rsp;
1612 struct timeval timeout;
1613 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1614 int watch_client_socket = 1;
1617 memset(buf, 0, sizeof(buf));
1621 if (receive_client_request(csp) != JB_ERR_OK)
1625 if (parse_client_request(csp) != JB_ERR_OK)
1630 /* decide how to route the HTTP request */
1631 fwd = forward_url(csp, http);
1634 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1635 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1640 * build the http request to send to the server
1641 * we have to do one of the following:
1643 * create = use the original HTTP request to create a new
1644 * HTTP request that has either the path component
1645 * without the http://domainspec (w/path) or the
1646 * full orininal URL (w/url)
1647 * Note that the path and/or the HTTP version may
1648 * have been altered by now.
1650 * connect = Open a socket to the host:port of the server
1651 * and short-circuit server and client socket.
1653 * pass = Pass the request unchanged if forwarding a CONNECT
1654 * request to a parent proxy. Note that we'll be sending
1655 * the CFAIL message ourselves if connecting to the parent
1656 * fails, but we won't send a CSUCCEED message if it works,
1657 * since that would result in a double message (ours and the
1658 * parent's). After sending the request to the parent, we simply
1661 * here's the matrix:
1664 * +--------+--------+
1666 * 0 | create | connect|
1668 * Forwarding +--------+--------+
1670 * 1 | create | pass |
1672 * +--------+--------+
1676 if (http->ssl && connect_port_is_forbidden(csp))
1678 const char *acceptable_connect_ports =
1679 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
1680 assert(NULL != acceptable_connect_ports);
1681 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
1682 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
1683 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
1684 csp->action->flags |= ACTION_BLOCK;
1690 freez(csp->headers->first->str);
1691 build_request_line(csp, fwd, &csp->headers->first->str);
1695 * We have a request. Check if one of the crunchers wants it.
1697 if (crunch_response_triggered(csp, crunchers_all))
1700 * Yes. The client got the crunch response
1701 * and we are done here after cleaning up.
1703 /* XXX: why list_remove_all()? */
1704 list_remove_all(csp->headers);
1709 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1711 if (fwd->forward_host)
1713 log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
1714 fwd->forward_host, fwd->forward_port, http->hostport);
1718 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1721 /* here we connect to the server, gateway, or the forwarder */
1723 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1724 if ((csp->server_connection.sfd != JB_INVALID_SOCKET)
1725 && socket_is_still_usable(csp->server_connection.sfd)
1726 && connection_destination_matches(&csp->server_connection, http, fwd))
1728 log_error(LOG_LEVEL_CONNECT,
1729 "Reusing server socket %u. Opened for %s.",
1730 csp->server_connection.sfd, csp->server_connection.host);
1734 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
1736 log_error(LOG_LEVEL_CONNECT,
1737 "Closing server socket %u. Opened for %s.",
1738 csp->server_connection.sfd, csp->server_connection.host);
1739 close_socket(csp->server_connection.sfd);
1740 mark_connection_closed(&csp->server_connection);
1742 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1744 while ((csp->server_connection.sfd = forwarded_connect(fwd, http, csp))
1745 && (errno == EINVAL)
1746 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1748 log_error(LOG_LEVEL_ERROR,
1749 "failed request #%u to connect to %s. Trying again.",
1750 forwarded_connect_retries, http->hostport);
1753 if (csp->server_connection.sfd == JB_INVALID_SOCKET)
1755 if (fwd->type != SOCKS_NONE)
1758 rsp = error_response(csp, "forwarding-failed");
1760 else if (errno == EINVAL)
1762 rsp = error_response(csp, "no-such-domain");
1766 rsp = error_response(csp, "connect-failed");
1767 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1771 /* Write the answer to the client */
1774 send_crunch_response(csp, rsp);
1779 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1780 save_connection_destination(csp->server_connection.sfd,
1781 http, fwd, &csp->server_connection);
1782 csp->server_connection.keep_alive_timeout =
1783 (unsigned)csp->config->keep_alive_timeout;
1785 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1787 hdr = list_to_text(csp->headers);
1790 /* FIXME Should handle error properly */
1791 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1793 list_remove_all(csp->headers);
1795 if (fwd->forward_host || (http->ssl == 0))
1798 * Write the client's (modified) header to the server
1799 * (along with anything else that may be in the buffer)
1801 if (write_socket(csp->server_connection.sfd, hdr, strlen(hdr))
1802 || (flush_socket(csp->server_connection.sfd, csp->iob) < 0))
1804 log_error(LOG_LEVEL_CONNECT,
1805 "write header to: %s failed: %E", http->hostport);
1807 rsp = error_response(csp, "connect-failed");
1810 send_crunch_response(csp, rsp);
1820 * We're running an SSL tunnel and we're not forwarding,
1821 * so just send the "connect succeeded" message to the
1822 * client, flush the rest, and get out of the way.
1824 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
1832 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
1834 csp->server_connection.request_sent = time(NULL);
1836 /* we're finished with the client's header */
1839 maxfd = (csp->cfd > csp->server_connection.sfd) ?
1840 csp->cfd : csp->server_connection.sfd;
1842 /* pass data between the client and server
1843 * until one or the other shuts down the connection.
1852 * FD_ZERO here seems to point to an errant macro which crashes.
1853 * So do this by hand for now...
1855 memset(&rfds,0x00,sizeof(fd_set));
1859 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1860 if (!watch_client_socket)
1862 maxfd = csp->server_connection.sfd;
1865 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1867 FD_SET(csp->cfd, &rfds);
1870 FD_SET(csp->server_connection.sfd, &rfds);
1872 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1873 if ((csp->flags & CSP_FLAG_CHUNKED)
1874 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
1875 && ((csp->iob->eod - csp->iob->cur) >= 5)
1876 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
1878 log_error(LOG_LEVEL_CONNECT,
1879 "Looks like we read the last chunk together with "
1880 "the server headers. We better stop reading.");
1881 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
1882 csp->expected_content_length = byte_count;
1883 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
1885 if (server_body && server_response_is_complete(csp, byte_count))
1887 if (csp->expected_content_length == byte_count)
1889 log_error(LOG_LEVEL_CONNECT,
1890 "Done reading from server. Content length: %llu as expected. "
1891 "Bytes most recently read: %d.",
1896 log_error(LOG_LEVEL_CONNECT,
1897 "Done reading from server. Expected content length: %llu. "
1898 "Actual content length: %llu. Bytes most recently read: %d.",
1899 csp->expected_content_length, byte_count, len);
1903 * XXX: should not jump around,
1904 * chat() is complicated enough already.
1908 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1910 timeout.tv_sec = csp->config->socket_timeout;
1911 timeout.tv_usec = 0;
1912 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
1916 log_error(LOG_LEVEL_ERROR,
1917 "Didn't receive data in time: %s", http->url);
1918 if ((byte_count == 0) && (http->ssl == 0))
1920 send_crunch_response(csp, error_response(csp, "connection-timeout"));
1922 mark_server_socket_tainted(csp);
1927 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1928 mark_server_socket_tainted(csp);
1933 * This is the body of the browser's request,
1934 * just read and write it.
1936 * XXX: Make sure the client doesn't use pipelining
1937 * behind Privoxy's back.
1939 if (FD_ISSET(csp->cfd, &rfds))
1941 int max_bytes_to_read = sizeof(buf) - 1;
1943 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1944 if ((csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
1946 if (data_is_available(csp->cfd, 0))
1949 * If the next request is already waiting, we have
1950 * to stop select()ing the client socket. Otherwise
1951 * we would always return right away and get nothing
1954 watch_client_socket = 0;
1955 log_error(LOG_LEVEL_CONNECT,
1956 "Stopping to watch the client socket. "
1957 "There's already another request waiting.");
1961 * If the client socket is set, but there's no data
1962 * available on the socket, the client went fishing
1963 * and continuing talking to the server makes no sense.
1965 log_error(LOG_LEVEL_CONNECT,
1966 "The client closed socket %d while "
1967 "the server socket %d is still open.",
1968 csp->cfd, csp->server_connection.sfd);
1969 mark_server_socket_tainted(csp);
1972 if (csp->expected_client_content_length != 0)
1974 if (csp->expected_client_content_length < (sizeof(buf) - 1))
1976 max_bytes_to_read = (int)csp->expected_client_content_length;
1978 log_error(LOG_LEVEL_CONNECT,
1979 "Waiting for up to %d bytes from the client.",
1982 assert(max_bytes_to_read < sizeof(buf));
1983 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1985 len = read_socket(csp->cfd, buf, max_bytes_to_read);
1989 /* XXX: not sure if this is necessary. */
1990 mark_server_socket_tainted(csp);
1991 break; /* "game over, man" */
1994 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1995 if (csp->expected_client_content_length != 0)
1997 assert(len <= max_bytes_to_read);
1998 csp->expected_client_content_length -= (unsigned)len;
1999 log_error(LOG_LEVEL_CONNECT,
2000 "Expected client content length set to %llu "
2001 "after reading %d bytes.",
2002 csp->expected_client_content_length, len);
2003 if (csp->expected_client_content_length == 0)
2005 log_error(LOG_LEVEL_CONNECT,
2006 "Done reading from the client.");
2007 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
2010 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2012 if (write_socket(csp->server_connection.sfd, buf, (size_t)len))
2014 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2015 mark_server_socket_tainted(csp);
2022 * The server wants to talk. It could be the header or the body.
2023 * If `hdr' is null, then it's the header otherwise it's the body.
2024 * FIXME: Does `hdr' really mean `host'? No.
2026 if (FD_ISSET(csp->server_connection.sfd, &rfds))
2028 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2029 if (!socket_is_still_usable(csp->cfd))
2032 log_error(LOG_LEVEL_CONNECT,
2033 "The server still wants to talk, but the client may already have hung up on us.");
2035 log_error(LOG_LEVEL_CONNECT,
2036 "The server still wants to talk, but the client hung up on us.");
2037 mark_server_socket_tainted(csp);
2039 #endif /* def _WIN32 */
2041 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2044 len = read_socket(csp->server_connection.sfd, buf, sizeof(buf) - 1);
2048 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2050 if (http->ssl && (fwd->forward_host == NULL))
2053 * Just hang up. We already confirmed the client's CONNECT
2054 * request with status code 200 and unencrypted content is
2055 * no longer welcome.
2057 log_error(LOG_LEVEL_ERROR,
2058 "CONNECT already confirmed. Unable to tell the client about the problem.");
2061 else if (byte_count)
2064 * Just hang up. We already transmitted the original headers
2065 * and parts of the original content and therefore missed the
2066 * chance to send an error message (without risking data corruption).
2068 * XXX: we could retry with a fancy range request here.
2070 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2071 "Unable to tell the client about the problem.");
2072 mark_server_socket_tainted(csp);
2076 * XXX: Consider handling the cases above the same.
2078 mark_server_socket_tainted(csp);
2082 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2083 if (csp->flags & CSP_FLAG_CHUNKED)
2085 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2087 /* XXX: this is a temporary hack */
2088 log_error(LOG_LEVEL_CONNECT,
2089 "Looks like we reached the end of the last chunk. "
2090 "We better stop reading.");
2091 csp->expected_content_length = byte_count + (unsigned long long)len;
2092 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2096 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2099 * Add a trailing zero to let be able to use string operations.
2100 * XXX: do we still need this with filter_popups gone?
2105 * Normally, this would indicate that we've read
2106 * as much as the server has sent us and we can
2107 * close the client connection. However, Microsoft
2108 * in its wisdom has released IIS/5 with a bug that
2109 * prevents it from sending the trailing \r\n in
2110 * a 302 redirect header (and possibly other headers).
2111 * To work around this if we've haven't parsed
2112 * a full header we'll append a trailing \r\n
2113 * and see if this now generates a valid one.
2115 * This hack shouldn't have any impacts. If we've
2116 * already transmitted the header or if this is a
2117 * SSL connection, then we won't bother with this
2118 * hack. So we only work on partially received
2119 * headers. If we append a \r\n and this still
2120 * doesn't generate a valid header, then we won't
2121 * transmit anything to the client.
2126 if (server_body || http->ssl)
2129 * If we have been buffering up the document,
2130 * now is the time to apply content modification
2131 * and send the result to the client.
2135 p = execute_content_filter(csp, content_filter);
2137 * If the content filter fails, use the original
2138 * buffer and length.
2139 * (see p != NULL ? p : csp->iob->cur below)
2143 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2146 if (JB_ERR_OK != update_server_headers(csp))
2148 log_error(LOG_LEVEL_FATAL,
2149 "Failed to update server headers. after filtering.");
2152 hdr = list_to_text(csp->headers);
2155 /* FIXME Should handle error properly */
2156 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2159 if (write_socket(csp->cfd, hdr, strlen(hdr))
2160 || write_socket(csp->cfd,
2161 ((p != NULL) ? p : csp->iob->cur), (size_t)csp->content_length))
2163 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2166 mark_server_socket_tainted(csp);
2174 break; /* "game over, man" */
2178 * This is NOT the body, so
2179 * Let's pretend the server just sent us a blank line.
2181 snprintf(buf, sizeof(buf), "\r\n");
2182 len = (int)strlen(buf);
2185 * Now, let the normal header parsing algorithm below do its
2186 * job. If it fails, we'll exit instead of continuing.
2193 * If this is an SSL connection or we're in the body
2194 * of the server document, just write it to the client,
2195 * unless we need to buffer the body for later content-filtering
2197 if (server_body || http->ssl)
2202 * If there is no memory left for buffering the content, or the buffer limit
2203 * has been reached, switch to non-filtering mode, i.e. make & write the
2204 * header, flush the iob and buf, and get out of the way.
2206 if (add_to_iob(csp, buf, len))
2211 log_error(LOG_LEVEL_INFO,
2212 "Flushing header and buffers. Stepping back from filtering.");
2214 hdr = list_to_text(csp->headers);
2218 * Memory is too tight to even generate the header.
2219 * Send our static "Out-of-memory" page.
2221 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2222 rsp = cgi_error_memory();
2223 send_crunch_response(csp, rsp);
2224 mark_server_socket_tainted(csp);
2227 hdrlen = strlen(hdr);
2229 if (write_socket(csp->cfd, hdr, hdrlen)
2230 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2231 || (write_socket(csp->cfd, buf, (size_t)len)))
2233 log_error(LOG_LEVEL_CONNECT,
2234 "Flush header and buffers to client failed: %E");
2236 mark_server_socket_tainted(csp);
2241 * Reset the byte_count to the amount of bytes
2242 * we just flushed. len will be added a few lines below,
2243 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2245 byte_count = (unsigned long long)flushed;
2247 content_filter = NULL;
2253 if (write_socket(csp->cfd, buf, (size_t)len))
2255 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2256 mark_server_socket_tainted(csp);
2260 byte_count += (unsigned long long)len;
2266 * We're still looking for the end of the server's header.
2267 * Buffer up the data we just read. If that fails, there's
2268 * little we can do but send our static out-of-memory page.
2270 if (add_to_iob(csp, buf, len))
2272 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2273 rsp = cgi_error_memory();
2274 send_crunch_response(csp, rsp);
2275 mark_server_socket_tainted(csp);
2279 /* Convert iob into something sed() can digest */
2280 if (JB_ERR_PARSE == get_server_headers(csp))
2285 * Well, we tried our MS IIS/5 hack and it didn't work.
2286 * The header is incomplete and there isn't anything
2287 * we can do about it.
2289 log_error(LOG_LEVEL_ERROR, "Invalid server headers. "
2290 "Applying the MS IIS5 hack didn't help.");
2291 log_error(LOG_LEVEL_CLF,
2292 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2293 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2294 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2295 mark_server_socket_tainted(csp);
2301 * Since we have to wait for more from the server before
2302 * we can parse the headers we just continue here.
2304 log_error(LOG_LEVEL_CONNECT,
2305 "Continuing buffering headers. Bytes most recently read: %d.",
2313 * Account for the content bytes we
2314 * might have gotten with the headers.
2316 assert(csp->iob->eod >= csp->iob->cur);
2317 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
2320 /* Did we actually get anything? */
2321 if (NULL == csp->headers->first)
2323 if ((csp->flags & CSP_FLAG_REUSED_CLIENT_CONNECTION))
2325 log_error(LOG_LEVEL_ERROR,
2326 "Empty server or forwarder response received on socket %d. "
2327 "Closing client socket %d without sending data.",
2328 csp->server_connection.sfd, csp->cfd);
2332 log_error(LOG_LEVEL_ERROR,
2333 "Empty server or forwarder response received on socket %d.",
2334 csp->server_connection.sfd);
2335 send_crunch_response(csp, error_response(csp, "no-server-data"));
2337 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2338 free_http_request(http);
2339 mark_server_socket_tainted(csp);
2343 assert(csp->headers->first->str);
2345 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
2346 strncmpic(csp->headers->first->str, "ICY", 3))
2349 * It doesn't look like a HTTP (or Shoutcast) response:
2350 * tell the client and log the problem.
2352 if (strlen(csp->headers->first->str) > 30)
2354 csp->headers->first->str[30] = '\0';
2356 log_error(LOG_LEVEL_ERROR,
2357 "Invalid server or forwarder response. Starts with: %s",
2358 csp->headers->first->str);
2359 log_error(LOG_LEVEL_CLF,
2360 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2361 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2362 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2363 free_http_request(http);
2364 mark_server_socket_tainted(csp);
2369 * We have now received the entire server header,
2370 * filter it and send the result to the client
2372 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
2374 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2376 hdr = list_to_text(csp->headers);
2379 /* FIXME Should handle error properly */
2380 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2383 csp->server_connection.response_received = time(NULL);
2385 if (crunch_response_triggered(csp, crunchers_light))
2388 * One of the tags created by a server-header
2389 * tagger triggered a crunch. We already
2390 * delivered the crunch response to the client
2391 * and are done here after cleaning up.
2394 mark_server_socket_tainted(csp);
2397 /* Buffer and pcrs filter this if appropriate. */
2399 if (!http->ssl) /* We talk plaintext */
2401 content_filter = get_filter_function(csp);
2404 * Only write if we're not buffering for content modification
2406 if (!content_filter)
2409 * Write the server's (modified) header to
2410 * the client (along with anything else that
2411 * may be in the buffer)
2414 if (write_socket(csp->cfd, hdr, strlen(hdr))
2415 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
2417 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2420 * The write failed, so don't bother mentioning it
2421 * to the client... it probably can't hear us anyway.
2424 mark_server_socket_tainted(csp);
2429 /* we're finished with the server's header */
2435 * If this was a MS IIS/5 hack then it means the server
2436 * has already closed the connection. Nothing more to read.
2441 log_error(LOG_LEVEL_ERROR,
2442 "Closed server connection detected. "
2443 "Applying the MS IIS5 hack didn't help.");
2444 log_error(LOG_LEVEL_CLF,
2445 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2446 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2447 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2448 mark_server_socket_tainted(csp);
2454 mark_server_socket_tainted(csp);
2455 return; /* huh? we should never get here */
2458 if (csp->content_length == 0)
2461 * If Privoxy didn't recalculate the Content-Lenght,
2462 * byte_count is still correct.
2464 csp->content_length = byte_count;
2467 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2468 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2469 && (csp->expected_content_length != byte_count))
2471 log_error(LOG_LEVEL_CONNECT,
2472 "Received %llu bytes while expecting %llu.",
2473 byte_count, csp->expected_content_length);
2474 mark_server_socket_tainted(csp);
2478 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
2479 csp->ip_addr_str, http->ocmd, csp->content_length);
2481 csp->server_connection.timestamp = time(NULL);
2485 /*********************************************************************
2489 * Description : This is little more than chat. We only "serve" to
2490 * to close (or remember) any socket that chat may have
2494 * 1 : csp = Current client state (buffers, headers, etc...)
2498 *********************************************************************/
2500 void serve(struct client_state *csp)
2501 #else /* ifndef AMIGA */
2502 static void serve(struct client_state *csp)
2503 #endif /* def AMIGA */
2505 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2506 #ifdef FEATURE_CONNECTION_SHARING
2507 static int monitor_thread_running = 0;
2508 #endif /* def FEATURE_CONNECTION_SHARING */
2509 int continue_chatting = 0;
2513 unsigned int latency;
2517 latency = (unsigned)(csp->server_connection.response_received -
2518 csp->server_connection.request_sent) / 2;
2520 continue_chatting = (csp->config->feature_flags
2521 & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
2522 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
2523 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
2524 && (csp->cfd != JB_INVALID_SOCKET)
2525 && (csp->server_connection.sfd != JB_INVALID_SOCKET)
2526 && socket_is_still_usable(csp->server_connection.sfd);
2528 if (continue_chatting)
2530 if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
2532 csp->server_connection.keep_alive_timeout = csp->config->default_server_timeout;
2533 log_error(LOG_LEVEL_CONNECT,
2534 "The server didn't specify how long the connection will stay open. "
2535 "Assumed timeout is: %u.", csp->server_connection.keep_alive_timeout);
2537 continue_chatting = (latency < csp->server_connection.keep_alive_timeout);
2540 if (continue_chatting)
2542 unsigned int client_timeout;
2544 client_timeout = (unsigned)csp->server_connection.keep_alive_timeout - latency;
2546 log_error(LOG_LEVEL_CONNECT,
2547 "Waiting for the next client request on socket %d. "
2548 "Keeping the server socket %d to %s open.",
2549 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
2550 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
2551 && data_is_available(csp->cfd, (int)client_timeout)
2552 && socket_is_still_usable(csp->cfd))
2554 log_error(LOG_LEVEL_CONNECT, "Client request arrived in "
2555 "time or the client closed the connection on socket %d.",
2558 * Get the csp in a mostly vergin state again.
2559 * XXX: Should be done elsewhere.
2561 csp->content_type = 0;
2562 csp->content_length = 0;
2563 csp->expected_content_length = 0;
2564 csp->expected_client_content_length = 0;
2565 list_remove_all(csp->headers);
2566 freez(csp->iob->buf);
2567 memset(csp->iob, 0, sizeof(csp->iob));
2568 freez(csp->error_message);
2569 free_http_request(csp->http);
2570 destroy_list(csp->headers);
2571 destroy_list(csp->tags);
2572 free_current_action(csp->action);
2573 if (NULL != csp->fwd)
2575 unload_forward_spec(csp->fwd);
2579 /* XXX: Store per-connection flags someplace else. */
2580 csp->flags = CSP_FLAG_ACTIVE |
2581 (csp->flags & CSP_FLAG_TOGGLED_ON) | CSP_FLAG_REUSED_CLIENT_CONNECTION;
2585 log_error(LOG_LEVEL_CONNECT,
2586 "No additional client request received in time on socket %d.",
2588 #ifdef FEATURE_CONNECTION_SHARING
2589 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
2590 && (socket_is_still_usable(csp->server_connection.sfd)))
2592 time_t time_open = time(NULL) - csp->server_connection.timestamp;
2594 if (csp->server_connection.keep_alive_timeout < time_open + latency)
2599 remember_connection(&csp->server_connection);
2600 csp->server_connection.sfd = JB_INVALID_SOCKET;
2601 close_socket(csp->cfd);
2602 csp->cfd = JB_INVALID_SOCKET;
2603 privoxy_mutex_lock(&connection_reuse_mutex);
2604 if (!monitor_thread_running)
2606 monitor_thread_running = 1;
2607 privoxy_mutex_unlock(&connection_reuse_mutex);
2608 wait_for_alive_connections();
2609 privoxy_mutex_lock(&connection_reuse_mutex);
2610 monitor_thread_running = 0;
2612 privoxy_mutex_unlock(&connection_reuse_mutex);
2614 #endif /* def FEATURE_CONNECTION_SHARING */
2618 else if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2620 log_error(LOG_LEVEL_CONNECT,
2621 "The connection on server socket %d to %s isn't reusable. "
2622 "Closing.", csp->server_connection.sfd, csp->server_connection.host);
2624 } while (continue_chatting);
2628 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2630 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2632 #ifdef FEATURE_CONNECTION_SHARING
2633 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
2635 forget_connection(csp->server_connection.sfd);
2637 #endif /* def FEATURE_CONNECTION_SHARING */
2638 close_socket(csp->server_connection.sfd);
2641 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2642 mark_connection_closed(&csp->server_connection);
2645 if (csp->cfd != JB_INVALID_SOCKET)
2647 close_socket(csp->cfd);
2650 csp->flags &= ~CSP_FLAG_ACTIVE;
2656 /*********************************************************************
2658 * Function : server_thread
2660 * Description : We only exist to call `serve' in a threaded environment.
2663 * 1 : data = Current client state (buffers, headers, etc...)
2665 * Returns : Always 0.
2667 *********************************************************************/
2668 static int32 server_thread(void *data)
2670 serve((struct client_state *) data);
2677 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2678 /*********************************************************************
2682 * Description : Print usage info & exit.
2684 * Parameters : Pointer to argv[0] for identifying ourselves
2688 *********************************************************************/
2689 static void usage(const char *myname)
2691 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2695 #endif /* defined(unix) */
2698 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
2699 #endif /* defined(unix) */
2700 "[--version] [configfile]\n"
2701 "Aborting\n", myname);
2706 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
2709 #ifdef MUTEX_LOCKS_AVAILABLE
2710 /*********************************************************************
2712 * Function : privoxy_mutex_lock
2714 * Description : Locks a mutex.
2717 * 1 : mutex = The mutex to lock.
2719 * Returns : Void. May exit in case of errors.
2721 *********************************************************************/
2722 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
2724 #ifdef FEATURE_PTHREAD
2725 int err = pthread_mutex_lock(mutex);
2728 if (mutex != &log_mutex)
2730 log_error(LOG_LEVEL_FATAL,
2731 "Mutex locking failed: %s.\n", strerror(err));
2736 EnterCriticalSection(mutex);
2737 #endif /* def FEATURE_PTHREAD */
2741 /*********************************************************************
2743 * Function : privoxy_mutex_unlock
2745 * Description : Unlocks a mutex.
2748 * 1 : mutex = The mutex to unlock.
2750 * Returns : Void. May exit in case of errors.
2752 *********************************************************************/
2753 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
2755 #ifdef FEATURE_PTHREAD
2756 int err = pthread_mutex_unlock(mutex);
2759 if (mutex != &log_mutex)
2761 log_error(LOG_LEVEL_FATAL,
2762 "Mutex unlocking failed: %s.\n", strerror(err));
2767 LeaveCriticalSection(mutex);
2768 #endif /* def FEATURE_PTHREAD */
2772 /*********************************************************************
2774 * Function : privoxy_mutex_init
2776 * Description : Prepares a mutex.
2779 * 1 : mutex = The mutex to initialize.
2781 * Returns : Void. May exit in case of errors.
2783 *********************************************************************/
2784 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
2786 #ifdef FEATURE_PTHREAD
2787 int err = pthread_mutex_init(mutex, 0);
2790 printf("Fatal error. Mutex initialization failed: %s.\n",
2795 InitializeCriticalSection(mutex);
2796 #endif /* def FEATURE_PTHREAD */
2798 #endif /* def MUTEX_LOCKS_AVAILABLE */
2800 /*********************************************************************
2802 * Function : initialize_mutexes
2804 * Description : Prepares mutexes if mutex support is available.
2808 * Returns : Void, exits in case of errors.
2810 *********************************************************************/
2811 static void initialize_mutexes(void)
2813 #ifdef MUTEX_LOCKS_AVAILABLE
2815 * Prepare global mutex semaphores
2817 privoxy_mutex_init(&log_mutex);
2818 privoxy_mutex_init(&log_init_mutex);
2819 privoxy_mutex_init(&connection_reuse_mutex);
2822 * XXX: The assumptions below are a bit naive
2823 * and can cause locks that aren't necessary.
2825 * For example older FreeBSD versions (< 6.x?)
2826 * have no gethostbyname_r, but gethostbyname is
2829 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
2830 privoxy_mutex_init(&resolver_mutex);
2831 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
2833 * XXX: should we use a single mutex for
2834 * localtime() and gmtime() as well?
2836 #ifndef HAVE_GMTIME_R
2837 privoxy_mutex_init(&gmtime_mutex);
2838 #endif /* ndef HAVE_GMTIME_R */
2840 #ifndef HAVE_LOCALTIME_R
2841 privoxy_mutex_init(&localtime_mutex);
2842 #endif /* ndef HAVE_GMTIME_R */
2845 privoxy_mutex_init(&rand_mutex);
2846 #endif /* ndef HAVE_RANDOM */
2847 #endif /* def MUTEX_LOCKS_AVAILABLE */
2851 /*********************************************************************
2855 * Description : Load the config file and start the listen loop.
2856 * This function is a lot more *sane* with the `load_config'
2857 * and `listen_loop' functions; although it stills does
2858 * a *little* too much for my taste.
2861 * 1 : argc = Number of parameters (including $0).
2862 * 2 : argv = Array of (char *)'s to the parameters.
2864 * Returns : 1 if : can't open config file, unrecognized directive,
2865 * stats requested in multi-thread mode, can't open the
2866 * log file, can't open the jar file, listen port is invalid,
2867 * any load fails, and can't bind port.
2869 * Else main never returns, the process must be signaled
2870 * to terminate execution. Or, on Windows, use the
2871 * "File", "Exit" menu option.
2873 *********************************************************************/
2875 int real_main(int argc, char **argv)
2877 int main(int argc, char **argv)
2881 unsigned int random_seed;
2883 struct passwd *pw = NULL;
2884 struct group *grp = NULL;
2887 char *pre_chroot_nslookup_to_load_resolver = NULL;
2894 #if !defined(_WIN32)
2901 /* Prepare mutexes if supported and necessary. */
2902 initialize_mutexes();
2904 /* Enable logging until further notice. */
2908 * Parse the command line arguments
2910 * XXX: simply printing usage information in case of
2911 * invalid arguments isn't particularly user friendly.
2913 while (++argc_pos < argc)
2916 /* Check to see if the service must be installed or uninstalled */
2917 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2919 const char *pName = argv[argc_pos] + 9;
2922 exit( (install_service(pName)) ? 0 : 1 );
2924 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2926 const char *pName = argv[argc_pos] + 11;
2929 exit((uninstall_service(pName)) ? 0 : 1);
2931 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2933 bRunAsService = TRUE;
2934 w32_set_service_cwd();
2935 atexit(w32_service_exit_notify);
2938 #endif /* defined(_WIN32) */
2941 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2943 if (strcmp(argv[argc_pos], "--help") == 0)
2948 else if(strcmp(argv[argc_pos], "--version") == 0)
2950 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2956 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2958 set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
2962 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2964 if (++argc_pos == argc) usage(argv[0]);
2965 pidfile = strdup(argv[argc_pos]);
2968 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2970 if (++argc_pos == argc) usage(argv[argc_pos]);
2972 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2975 if (NULL == (grp = getgrnam(p)))
2977 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2981 if (NULL == (pw = getpwnam(argv[argc_pos])))
2983 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2986 if (p != NULL) *--p = '\0';
2989 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
2991 if (++argc_pos == argc) usage(argv[0]);
2992 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
2995 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2999 #endif /* defined(unix) */
3001 else if (argc_pos + 1 != argc)
3004 * This is neither the last command line
3005 * option, nor was it recognized before,
3006 * therefore it must be invalid.
3012 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3014 configfile = argv[argc_pos];
3017 } /* -END- while (more arguments) */
3019 show_version(Argv[0]);
3022 if ( *configfile != '/' )
3024 char cwd[BUFFER_SIZE];
3026 size_t abs_file_size;
3028 /* make config-filename absolute here */
3029 if (NULL == getcwd(cwd, sizeof(cwd)))
3031 perror("failed to get current working directory");
3036 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3037 basedir = strdup(cwd);
3039 if (NULL == basedir ||
3040 NULL == (abs_file = malloc(abs_file_size)))
3042 perror("malloc failed");
3045 strlcpy(abs_file, basedir, abs_file_size);
3046 strlcat(abs_file, "/", abs_file_size );
3047 strlcat(abs_file, configfile, abs_file_size);
3048 configfile = abs_file;
3050 #endif /* defined unix */
3054 clients->next = NULL;
3056 /* XXX: factor out initialising after the next stable release. */
3059 #elif defined(_WIN32)
3063 random_seed = (unsigned int)time(NULL);
3065 srandom(random_seed);
3068 #endif /* ifdef HAVE_RANDOM */
3071 * Unix signal handling
3073 * Catch the abort, interrupt and terminate signals for a graceful exit
3074 * Catch the hangup signal so the errlog can be reopened.
3075 * Ignore the broken pipe signals (FIXME: Why?)
3077 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3080 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3081 const int ignored_signals[] = { SIGPIPE, 0 };
3083 for (idx = 0; catched_signals[idx] != 0; idx++)
3085 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3086 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3088 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3089 #endif /* ifdef sun */
3091 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3095 for (idx = 0; ignored_signals[idx] != 0; idx++)
3097 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3099 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3104 #else /* ifdef _WIN32 */
3105 # ifdef _WIN_CONSOLE
3107 * We *are* in a windows console app.
3108 * Print a verbose messages about FAQ's and such
3110 printf("%s", win32_blurb);
3111 # endif /* def _WIN_CONSOLE */
3112 #endif /* def _WIN32 */
3115 /* Initialize the CGI subsystem */
3116 cgi_init_error_messages();
3119 * If runnig on unix and without the --nodaemon
3120 * option, become a daemon. I.e. fork, detach
3121 * from tty and get process group leadership
3133 if ( pid < 0 ) /* error */
3138 else if ( pid != 0 ) /* parent */
3143 * must check for errors
3144 * child died due to missing files aso
3147 wpid = waitpid( pid, &status, WNOHANG );
3159 * stderr (fd 2) will be closed later on,
3160 * when the config file has been parsed.
3166 * Reserve fd 0 and 1 to prevent abort() and friends
3167 * from sending stuff to the clients or servers.
3169 fd = open("/dev/null", O_RDONLY);
3172 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
3176 if (dup2(fd, 0) == -1)
3178 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 0: %E");
3182 fd = open("/dev/null", O_WRONLY);
3185 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
3189 if (dup2(fd, 1) == -1)
3191 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 1: %E");
3198 } /* -END- if (daemon_mode) */
3201 * As soon as we have written the PID file, we can switch
3202 * to the user and group ID indicated by the --user option
3208 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3210 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3214 if (setgroups(1, &grp->gr_gid))
3216 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
3219 else if (initgroups(pw->pw_name, pw->pw_gid))
3221 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
3227 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3229 /* Read the time zone file from /etc before doing chroot. */
3231 if (NULL != pre_chroot_nslookup_to_load_resolver
3232 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3234 /* Initialize resolver library. */
3235 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3237 if (chroot(pw->pw_dir) < 0)
3239 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3243 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3246 if (setuid(pw->pw_uid))
3248 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3252 char putenv_dummy[64];
3254 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3255 if (putenv(putenv_dummy) != 0)
3257 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3260 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3261 if (putenv(putenv_dummy) != 0)
3263 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3269 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3272 #endif /* defined unix */
3275 /* This will be FALSE unless the command line specified --service
3279 /* Yup, so now we must attempt to establish a connection
3280 * with the service dispatcher. This will only work if this
3281 * process was launched by the service control manager to
3282 * actually run as a service. If this isn't the case, i've
3283 * known it take around 30 seconds or so for the call to return.
3286 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3287 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3289 /* Service has run, and at this point is now being stopped, so just return */
3294 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3296 /* An error occurred. Usually it's because --service was wrongly specified
3297 * and we were unable to connect to the Service Control Dispatcher because
3298 * it wasn't expecting us and is therefore not listening.
3300 * For now, just continue below to call the listen_loop function.
3303 #endif /* def _WIN32 */
3313 /*********************************************************************
3315 * Function : bind_port_helper
3317 * Description : Bind the listen port. Handles logging, and aborts
3321 * 1 : config = Privoxy configuration. Specifies port
3324 * Returns : Port that was opened.
3326 *********************************************************************/
3327 static jb_socket bind_port_helper(struct configuration_spec * config)
3332 if (config->haddr == NULL)
3334 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3339 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3340 config->hport, config->haddr);
3343 result = bind_port(config->haddr, config->hport, &bfd);
3350 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3351 "There may be another Privoxy or some other "
3352 "proxy running on port %d",
3353 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3354 config->hport, config->hport);
3357 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3358 "The hostname is not resolvable",
3359 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3362 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: %E",
3363 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3366 /* shouldn't get here */
3367 return JB_INVALID_SOCKET;
3370 config->need_bind = 0;
3377 /* Without this simple workaround we get this compiler warning from _beginthread
3378 * warning C4028: formal parameter 1 different from declaration
3380 void w32_service_listen_loop(void *p)
3384 #endif /* def _WIN32 */
3387 /*********************************************************************
3389 * Function : listen_loop
3391 * Description : bind the listen port and enter a "FOREVER" listening loop.
3397 *********************************************************************/
3398 static void listen_loop(void)
3400 struct client_state *csp = NULL;
3402 struct configuration_spec *config;
3403 unsigned int active_threads = 0;
3405 config = load_config();
3407 #ifdef FEATURE_CONNECTION_SHARING
3409 * XXX: Should be relocated once it no
3410 * longer needs to emit log messages.
3412 initialize_reusable_connections();
3413 #endif /* def FEATURE_CONNECTION_SHARING */
3415 bfd = bind_port_helper(config);
3417 #ifdef FEATURE_GRACEFUL_TERMINATION
3418 while (!g_terminate)
3423 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3424 while (waitpid(-1, NULL, WNOHANG) > 0)
3426 /* zombie children */
3428 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3431 * Free data that was used by died threads
3433 active_threads = sweep();
3437 * Re-open the errlog after HUP signal
3439 if (received_hup_signal)
3441 if (NULL != config->logfile)
3443 init_error_log(Argv[0], config->logfile);
3445 received_hup_signal = 0;
3449 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3451 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3455 csp->flags |= CSP_FLAG_ACTIVE;
3456 csp->server_connection.sfd = JB_INVALID_SOCKET;
3458 csp->config = config = load_config();
3460 if ( config->need_bind )
3463 * Since we were listening to the "old port", we will not see
3464 * a "listen" param change until the next request. So, at
3465 * least 1 more request must be made for us to find the new
3466 * setting. I am simply closing the old socket and binding the
3469 * Which-ever is correct, we will serve 1 more page via the
3470 * old settings. This should probably be a "show-proxy-args"
3471 * request. This should not be a so common of an operation
3472 * that this will hurt people's feelings.
3477 bfd = bind_port_helper(config);
3480 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3482 if (!accept_connection(csp, bfd))
3484 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3497 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3500 #ifdef FEATURE_TOGGLE
3501 if (global_toggle_state)
3502 #endif /* def FEATURE_TOGGLE */
3504 csp->flags |= CSP_FLAG_TOGGLED_ON;
3507 if (run_loader(csp))
3509 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3510 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3514 if (block_acl(NULL,csp))
3516 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
3517 close_socket(csp->cfd);
3518 freez(csp->ip_addr_str);
3522 #endif /* def FEATURE_ACL */
3524 if ((0 != config->max_client_connections)
3525 && (active_threads >= config->max_client_connections))
3527 log_error(LOG_LEVEL_CONNECT,
3528 "Rejecting connection from %s. Maximum number of connections reached.",
3530 write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
3531 strlen(TOO_MANY_CONNECTIONS_RESPONSE));
3532 close_socket(csp->cfd);
3533 freez(csp->ip_addr_str);
3538 /* add it to the list of clients */
3539 csp->next = clients->next;
3540 clients->next = csp;
3542 if (config->multi_threaded)
3546 /* this is a switch () statment in the C preprocessor - ugh */
3547 #undef SELECTED_ONE_OPTION
3549 /* Use Pthreads in preference to native code */
3550 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3551 #define SELECTED_ONE_OPTION
3553 pthread_t the_thread;
3554 pthread_attr_t attrs;
3556 pthread_attr_init(&attrs);
3557 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3558 errno = pthread_create(&the_thread, &attrs,
3559 (void * (*)(void *))serve, csp);
3560 child_id = errno ? -1 : 0;
3561 pthread_attr_destroy(&attrs);
3565 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3566 #define SELECTED_ONE_OPTION
3567 child_id = _beginthread(
3568 (void (*)(void *))serve,
3573 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3574 #define SELECTED_ONE_OPTION
3575 child_id = _beginthread(
3576 (void(* _Optlink)(void*))serve,
3582 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3583 #define SELECTED_ONE_OPTION
3585 thread_id tid = spawn_thread
3586 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3588 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3590 child_id = (int) tid;
3599 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3600 #define SELECTED_ONE_OPTION
3601 csp->cfd = ReleaseSocket(csp->cfd, -1);
3604 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3605 NP_Output, Output(),
3606 NP_CloseOutput, FALSE,
3607 NP_Name, (ULONG)"privoxy child",
3611 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3612 NP_Output, Output(),
3613 NP_CloseOutput, FALSE,
3614 NP_Name, (ULONG)"privoxy child",
3615 NP_StackSize, 200*1024,
3621 ((struct Task *)child_id)->tc_UserData = csp;
3622 Signal((struct Task *)child_id, SIGF_SINGLE);
3627 #if !defined(SELECTED_ONE_OPTION)
3630 /* This block is only needed when using fork().
3631 * When using threads, the server thread was
3632 * created and run by the call to _beginthread().
3634 if (child_id == 0) /* child */
3637 #ifdef FEATURE_TOGGLE
3638 int inherited_toggle_state = global_toggle_state;
3639 #endif /* def FEATURE_TOGGLE */
3644 * If we've been toggled or we've blocked the request, tell Mom
3647 #ifdef FEATURE_TOGGLE
3648 if (inherited_toggle_state != global_toggle_state)
3650 rc |= RC_FLAG_TOGGLED;
3652 #endif /* def FEATURE_TOGGLE */
3654 #ifdef FEATURE_STATISTICS
3655 if (csp->flags & CSP_FLAG_REJECTED)
3657 rc |= RC_FLAG_BLOCKED;
3659 #endif /* ndef FEATURE_STATISTICS */
3663 else if (child_id > 0) /* parent */
3665 /* in a fork()'d environment, the parent's
3666 * copy of the client socket and the CSP
3670 #if !defined(_WIN32) && !defined(__CYGWIN__)
3672 wait( &child_status );
3675 * Evaluate child's return code: If the child has
3676 * - been toggled, toggle ourselves
3677 * - blocked its request, bump up the stats counter
3680 #ifdef FEATURE_TOGGLE
3681 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
3683 global_toggle_state = !global_toggle_state;
3685 #endif /* def FEATURE_TOGGLE */
3687 #ifdef FEATURE_STATISTICS
3689 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
3693 #endif /* def FEATURE_STATISTICS */
3695 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
3696 close_socket(csp->cfd);
3697 csp->flags &= ~CSP_FLAG_ACTIVE;
3701 #undef SELECTED_ONE_OPTION
3702 /* end of cpp switch () */
3707 * Spawning the child failed, assume it's because
3708 * there are too many children running already.
3709 * XXX: If you assume ...
3711 log_error(LOG_LEVEL_ERROR,
3712 "Unable to take any additional connections: %E");
3713 write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
3714 strlen(TOO_MANY_CONNECTIONS_RESPONSE));
3715 close_socket(csp->cfd);
3716 csp->flags &= ~CSP_FLAG_ACTIVE;
3725 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
3727 /* Clean up. Aim: free all memory (no leaks) */
3728 #ifdef FEATURE_GRACEFUL_TERMINATION
3730 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
3732 unload_current_config_file();
3733 unload_current_actions_file();
3734 unload_current_re_filterfile();
3735 #ifdef FEATURE_TRUST
3736 unload_current_trust_file();
3739 if (config->multi_threaded)
3746 } while ((clients->next != NULL) && (--i > 0));
3750 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
3761 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
3762 /* Cleanup - remove taskbar icon etc. */
3767 #endif /* FEATURE_GRACEFUL_TERMINATION */