1 const char jcc_rcs[] = "$Id: jcc.c,v 1.310 2009/12/29 13:17:37 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 was 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 to the client has been accepted,
1571 * this function is called (via serve()) to handle the
1572 * main business of the communication. When this
1573 * function returns, the caller must close the client
1576 * FIXME: chat is nearly thousand lines long.
1580 * 1 : csp = Current client state (buffers, headers, etc...)
1582 * Returns : Nothing.
1584 *********************************************************************/
1585 static void chat(struct client_state *csp)
1587 char buf[BUFFER_SIZE];
1594 int ms_iis5_hack = 0;
1595 unsigned long long byte_count = 0;
1596 int forwarded_connect_retries = 0;
1597 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1598 const struct forward_spec *fwd;
1599 struct http_request *http;
1600 long len = 0; /* for buffer sizes (and negative error codes) */
1602 /* Function that does the content filtering for the current request */
1603 filter_function_ptr content_filter = NULL;
1605 /* Skeleton for HTTP response, if we should intercept the request */
1606 struct http_response *rsp;
1607 struct timeval timeout;
1608 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1609 int watch_client_socket = 1;
1612 memset(buf, 0, sizeof(buf));
1616 if (receive_client_request(csp) != JB_ERR_OK)
1620 if (parse_client_request(csp) != JB_ERR_OK)
1625 /* decide how to route the HTTP request */
1626 fwd = forward_url(csp, http);
1629 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1630 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1635 * build the http request to send to the server
1636 * we have to do one of the following:
1638 * create = use the original HTTP request to create a new
1639 * HTTP request that has either the path component
1640 * without the http://domainspec (w/path) or the
1641 * full orininal URL (w/url)
1642 * Note that the path and/or the HTTP version may
1643 * have been altered by now.
1645 * connect = Open a socket to the host:port of the server
1646 * and short-circuit server and client socket.
1648 * pass = Pass the request unchanged if forwarding a CONNECT
1649 * request to a parent proxy. Note that we'll be sending
1650 * the CFAIL message ourselves if connecting to the parent
1651 * fails, but we won't send a CSUCCEED message if it works,
1652 * since that would result in a double message (ours and the
1653 * parent's). After sending the request to the parent, we simply
1656 * here's the matrix:
1659 * +--------+--------+
1661 * 0 | create | connect|
1663 * Forwarding +--------+--------+
1665 * 1 | create | pass |
1667 * +--------+--------+
1671 if (http->ssl && connect_port_is_forbidden(csp))
1673 const char *acceptable_connect_ports =
1674 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
1675 assert(NULL != acceptable_connect_ports);
1676 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
1677 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
1678 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
1679 csp->action->flags |= ACTION_BLOCK;
1685 freez(csp->headers->first->str);
1686 build_request_line(csp, fwd, &csp->headers->first->str);
1690 * We have a request. Check if one of the crunchers wants it.
1692 if (crunch_response_triggered(csp, crunchers_all))
1695 * Yes. The client got the crunch response
1696 * and we are done here after cleaning up.
1698 /* XXX: why list_remove_all()? */
1699 list_remove_all(csp->headers);
1704 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1706 if (fwd->forward_host)
1708 log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
1709 fwd->forward_host, fwd->forward_port, http->hostport);
1713 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1716 /* here we connect to the server, gateway, or the forwarder */
1718 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1719 if ((csp->server_connection.sfd != JB_INVALID_SOCKET)
1720 && socket_is_still_usable(csp->server_connection.sfd)
1721 && connection_destination_matches(&csp->server_connection, http, fwd))
1723 log_error(LOG_LEVEL_CONNECT,
1724 "Reusing server socket %u. Opened for %s.",
1725 csp->server_connection.sfd, csp->server_connection.host);
1729 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
1731 log_error(LOG_LEVEL_CONNECT,
1732 "Closing server socket %u. Opened for %s.",
1733 csp->server_connection.sfd, csp->server_connection.host);
1734 close_socket(csp->server_connection.sfd);
1735 mark_connection_closed(&csp->server_connection);
1737 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1739 while ((csp->server_connection.sfd = forwarded_connect(fwd, http, csp))
1740 && (errno == EINVAL)
1741 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1743 log_error(LOG_LEVEL_ERROR,
1744 "failed request #%u to connect to %s. Trying again.",
1745 forwarded_connect_retries, http->hostport);
1748 if (csp->server_connection.sfd == JB_INVALID_SOCKET)
1750 if (fwd->type != SOCKS_NONE)
1753 rsp = error_response(csp, "forwarding-failed");
1755 else if (errno == EINVAL)
1757 rsp = error_response(csp, "no-such-domain");
1761 rsp = error_response(csp, "connect-failed");
1762 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1766 /* Write the answer to the client */
1769 send_crunch_response(csp, rsp);
1774 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1775 save_connection_destination(csp->server_connection.sfd,
1776 http, fwd, &csp->server_connection);
1777 csp->server_connection.keep_alive_timeout =
1778 (unsigned)csp->config->keep_alive_timeout;
1780 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1782 hdr = list_to_text(csp->headers);
1785 /* FIXME Should handle error properly */
1786 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1788 list_remove_all(csp->headers);
1790 if (fwd->forward_host || (http->ssl == 0))
1793 * Write the client's (modified) header to the server
1794 * (along with anything else that may be in the buffer)
1796 if (write_socket(csp->server_connection.sfd, hdr, strlen(hdr))
1797 || (flush_socket(csp->server_connection.sfd, csp->iob) < 0))
1799 log_error(LOG_LEVEL_CONNECT,
1800 "write header to: %s failed: %E", http->hostport);
1802 rsp = error_response(csp, "connect-failed");
1805 send_crunch_response(csp, rsp);
1815 * We're running an SSL tunnel and we're not forwarding,
1816 * so just send the "connect succeeded" message to the
1817 * client, flush the rest, and get out of the way.
1819 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
1827 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
1829 csp->server_connection.request_sent = time(NULL);
1831 /* we're finished with the client's header */
1834 maxfd = (csp->cfd > csp->server_connection.sfd) ?
1835 csp->cfd : csp->server_connection.sfd;
1837 /* pass data between the client and server
1838 * until one or the other shuts down the connection.
1847 * FD_ZERO here seems to point to an errant macro which crashes.
1848 * So do this by hand for now...
1850 memset(&rfds,0x00,sizeof(fd_set));
1854 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1855 if (!watch_client_socket)
1857 maxfd = csp->server_connection.sfd;
1860 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1862 FD_SET(csp->cfd, &rfds);
1865 FD_SET(csp->server_connection.sfd, &rfds);
1867 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1868 if ((csp->flags & CSP_FLAG_CHUNKED)
1869 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
1870 && ((csp->iob->eod - csp->iob->cur) >= 5)
1871 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
1873 log_error(LOG_LEVEL_CONNECT,
1874 "Looks like we read the last chunk together with "
1875 "the server headers. We better stop reading.");
1876 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
1877 csp->expected_content_length = byte_count;
1878 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
1880 if (server_body && server_response_is_complete(csp, byte_count))
1882 if (csp->expected_content_length == byte_count)
1884 log_error(LOG_LEVEL_CONNECT,
1885 "Done reading from server. Content length: %llu as expected. "
1886 "Bytes most recently read: %d.",
1891 log_error(LOG_LEVEL_CONNECT,
1892 "Done reading from server. Expected content length: %llu. "
1893 "Actual content length: %llu. Bytes most recently read: %d.",
1894 csp->expected_content_length, byte_count, len);
1898 * XXX: should not jump around,
1899 * chat() is complicated enough already.
1903 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1905 timeout.tv_sec = csp->config->socket_timeout;
1906 timeout.tv_usec = 0;
1907 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
1911 log_error(LOG_LEVEL_ERROR,
1912 "Didn't receive data in time: %s", http->url);
1913 if ((byte_count == 0) && (http->ssl == 0))
1915 send_crunch_response(csp, error_response(csp, "connection-timeout"));
1917 mark_server_socket_tainted(csp);
1922 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1923 mark_server_socket_tainted(csp);
1928 * This is the body of the browser's request,
1929 * just read and write it.
1931 * XXX: Make sure the client doesn't use pipelining
1932 * behind Privoxy's back.
1934 if (FD_ISSET(csp->cfd, &rfds))
1936 int max_bytes_to_read = sizeof(buf) - 1;
1938 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1939 if ((csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
1941 if (data_is_available(csp->cfd, 0))
1944 * If the next request is already waiting, we have
1945 * to stop select()ing the client socket. Otherwise
1946 * we would always return right away and get nothing
1949 watch_client_socket = 0;
1950 log_error(LOG_LEVEL_CONNECT,
1951 "Stopping to watch the client socket. "
1952 "There's already another request waiting.");
1956 * If the client socket is set, but there's no data
1957 * available on the socket, the client went fishing
1958 * and continuing talking to the server makes no sense.
1960 log_error(LOG_LEVEL_CONNECT,
1961 "The client closed socket %d while "
1962 "the server socket %d is still open.",
1963 csp->cfd, csp->server_connection.sfd);
1964 mark_server_socket_tainted(csp);
1967 if (csp->expected_client_content_length != 0)
1969 if (csp->expected_client_content_length < (sizeof(buf) - 1))
1971 max_bytes_to_read = (int)csp->expected_client_content_length;
1973 log_error(LOG_LEVEL_CONNECT,
1974 "Waiting for up to %d bytes from the client.",
1977 assert(max_bytes_to_read < sizeof(buf));
1978 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1980 len = read_socket(csp->cfd, buf, max_bytes_to_read);
1984 /* XXX: not sure if this is necessary. */
1985 mark_server_socket_tainted(csp);
1986 break; /* "game over, man" */
1989 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1990 if (csp->expected_client_content_length != 0)
1992 assert(len <= max_bytes_to_read);
1993 csp->expected_client_content_length -= (unsigned)len;
1994 log_error(LOG_LEVEL_CONNECT,
1995 "Expected client content length set to %llu "
1996 "after reading %d bytes.",
1997 csp->expected_client_content_length, len);
1998 if (csp->expected_client_content_length == 0)
2000 log_error(LOG_LEVEL_CONNECT,
2001 "Done reading from the client.");
2002 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
2005 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2007 if (write_socket(csp->server_connection.sfd, buf, (size_t)len))
2009 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2010 mark_server_socket_tainted(csp);
2017 * The server wants to talk. It could be the header or the body.
2018 * If `hdr' is null, then it's the header otherwise it's the body.
2019 * FIXME: Does `hdr' really mean `host'? No.
2021 if (FD_ISSET(csp->server_connection.sfd, &rfds))
2023 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2024 if (!socket_is_still_usable(csp->cfd))
2027 log_error(LOG_LEVEL_CONNECT,
2028 "The server still wants to talk, but the client may already have hung up on us.");
2030 log_error(LOG_LEVEL_CONNECT,
2031 "The server still wants to talk, but the client hung up on us.");
2032 mark_server_socket_tainted(csp);
2034 #endif /* def _WIN32 */
2036 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2039 len = read_socket(csp->server_connection.sfd, buf, sizeof(buf) - 1);
2043 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2045 if (http->ssl && (fwd->forward_host == NULL))
2048 * Just hang up. We already confirmed the client's CONNECT
2049 * request with status code 200 and unencrypted content is
2050 * no longer welcome.
2052 log_error(LOG_LEVEL_ERROR,
2053 "CONNECT already confirmed. Unable to tell the client about the problem.");
2056 else if (byte_count)
2059 * Just hang up. We already transmitted the original headers
2060 * and parts of the original content and therefore missed the
2061 * chance to send an error message (without risking data corruption).
2063 * XXX: we could retry with a fancy range request here.
2065 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2066 "Unable to tell the client about the problem.");
2067 mark_server_socket_tainted(csp);
2071 * XXX: Consider handling the cases above the same.
2073 mark_server_socket_tainted(csp);
2077 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2078 if (csp->flags & CSP_FLAG_CHUNKED)
2080 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2082 /* XXX: this is a temporary hack */
2083 log_error(LOG_LEVEL_CONNECT,
2084 "Looks like we reached the end of the last chunk. "
2085 "We better stop reading.");
2086 csp->expected_content_length = byte_count + (unsigned long long)len;
2087 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2091 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2094 * Add a trailing zero to let be able to use string operations.
2095 * XXX: do we still need this with filter_popups gone?
2100 * Normally, this would indicate that we've read
2101 * as much as the server has sent us and we can
2102 * close the client connection. However, Microsoft
2103 * in its wisdom has released IIS/5 with a bug that
2104 * prevents it from sending the trailing \r\n in
2105 * a 302 redirect header (and possibly other headers).
2106 * To work around this if we've haven't parsed
2107 * a full header we'll append a trailing \r\n
2108 * and see if this now generates a valid one.
2110 * This hack shouldn't have any impacts. If we've
2111 * already transmitted the header or if this is a
2112 * SSL connection, then we won't bother with this
2113 * hack. So we only work on partially received
2114 * headers. If we append a \r\n and this still
2115 * doesn't generate a valid header, then we won't
2116 * transmit anything to the client.
2121 if (server_body || http->ssl)
2124 * If we have been buffering up the document,
2125 * now is the time to apply content modification
2126 * and send the result to the client.
2130 p = execute_content_filter(csp, content_filter);
2132 * If the content filter fails, use the original
2133 * buffer and length.
2134 * (see p != NULL ? p : csp->iob->cur below)
2138 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2141 if (JB_ERR_OK != update_server_headers(csp))
2143 log_error(LOG_LEVEL_FATAL,
2144 "Failed to update server headers. after filtering.");
2147 hdr = list_to_text(csp->headers);
2150 /* FIXME Should handle error properly */
2151 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2154 if (write_socket(csp->cfd, hdr, strlen(hdr))
2155 || write_socket(csp->cfd,
2156 ((p != NULL) ? p : csp->iob->cur), (size_t)csp->content_length))
2158 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2161 mark_server_socket_tainted(csp);
2169 break; /* "game over, man" */
2173 * This is NOT the body, so
2174 * Let's pretend the server just sent us a blank line.
2176 snprintf(buf, sizeof(buf), "\r\n");
2177 len = (int)strlen(buf);
2180 * Now, let the normal header parsing algorithm below do its
2181 * job. If it fails, we'll exit instead of continuing.
2188 * If this is an SSL connection or we're in the body
2189 * of the server document, just write it to the client,
2190 * unless we need to buffer the body for later content-filtering
2192 if (server_body || http->ssl)
2197 * If there is no memory left for buffering the content, or the buffer limit
2198 * has been reached, switch to non-filtering mode, i.e. make & write the
2199 * header, flush the iob and buf, and get out of the way.
2201 if (add_to_iob(csp, buf, len))
2206 log_error(LOG_LEVEL_INFO,
2207 "Flushing header and buffers. Stepping back from filtering.");
2209 hdr = list_to_text(csp->headers);
2213 * Memory is too tight to even generate the header.
2214 * Send our static "Out-of-memory" page.
2216 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2217 rsp = cgi_error_memory();
2218 send_crunch_response(csp, rsp);
2219 mark_server_socket_tainted(csp);
2222 hdrlen = strlen(hdr);
2224 if (write_socket(csp->cfd, hdr, hdrlen)
2225 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2226 || (write_socket(csp->cfd, buf, (size_t)len)))
2228 log_error(LOG_LEVEL_CONNECT,
2229 "Flush header and buffers to client failed: %E");
2231 mark_server_socket_tainted(csp);
2236 * Reset the byte_count to the amount of bytes
2237 * we just flushed. len will be added a few lines below,
2238 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2240 byte_count = (unsigned long long)flushed;
2242 content_filter = NULL;
2248 if (write_socket(csp->cfd, buf, (size_t)len))
2250 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2251 mark_server_socket_tainted(csp);
2255 byte_count += (unsigned long long)len;
2261 * We're still looking for the end of the server's header.
2262 * Buffer up the data we just read. If that fails, there's
2263 * little we can do but send our static out-of-memory page.
2265 if (add_to_iob(csp, buf, len))
2267 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2268 rsp = cgi_error_memory();
2269 send_crunch_response(csp, rsp);
2270 mark_server_socket_tainted(csp);
2274 /* Convert iob into something sed() can digest */
2275 if (JB_ERR_PARSE == get_server_headers(csp))
2280 * Well, we tried our MS IIS/5 hack and it didn't work.
2281 * The header is incomplete and there isn't anything
2282 * we can do about it.
2284 log_error(LOG_LEVEL_ERROR, "Invalid server headers. "
2285 "Applying the MS IIS5 hack didn't help.");
2286 log_error(LOG_LEVEL_CLF,
2287 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2288 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2289 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2290 mark_server_socket_tainted(csp);
2296 * Since we have to wait for more from the server before
2297 * we can parse the headers we just continue here.
2299 log_error(LOG_LEVEL_CONNECT,
2300 "Continuing buffering headers. Bytes most recently read: %d.",
2308 * Account for the content bytes we
2309 * might have gotten with the headers.
2311 assert(csp->iob->eod >= csp->iob->cur);
2312 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
2315 /* Did we actually get anything? */
2316 if (NULL == csp->headers->first)
2318 if ((csp->flags & CSP_FLAG_REUSED_CLIENT_CONNECTION))
2320 log_error(LOG_LEVEL_ERROR,
2321 "Empty server or forwarder response received on socket %d. "
2322 "Closing client connection %d without sending data.",
2323 csp->server_connection.sfd, csp->cfd);
2327 log_error(LOG_LEVEL_ERROR,
2328 "Empty server or forwarder response received on socket %d.",
2329 csp->server_connection.sfd);
2330 send_crunch_response(csp, error_response(csp, "no-server-data"));
2332 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2333 free_http_request(http);
2334 mark_server_socket_tainted(csp);
2338 assert(csp->headers->first->str);
2340 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
2341 strncmpic(csp->headers->first->str, "ICY", 3))
2344 * It doesn't look like a HTTP (or Shoutcast) response:
2345 * tell the client and log the problem.
2347 if (strlen(csp->headers->first->str) > 30)
2349 csp->headers->first->str[30] = '\0';
2351 log_error(LOG_LEVEL_ERROR,
2352 "Invalid server or forwarder response. Starts with: %s",
2353 csp->headers->first->str);
2354 log_error(LOG_LEVEL_CLF,
2355 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2356 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2357 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2358 free_http_request(http);
2359 mark_server_socket_tainted(csp);
2364 * We have now received the entire server header,
2365 * filter it and send the result to the client
2367 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
2369 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2371 hdr = list_to_text(csp->headers);
2374 /* FIXME Should handle error properly */
2375 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2378 csp->server_connection.response_received = time(NULL);
2380 if (crunch_response_triggered(csp, crunchers_light))
2383 * One of the tags created by a server-header
2384 * tagger triggered a crunch. We already
2385 * delivered the crunch response to the client
2386 * and are done here after cleaning up.
2389 mark_server_socket_tainted(csp);
2392 /* Buffer and pcrs filter this if appropriate. */
2394 if (!http->ssl) /* We talk plaintext */
2396 content_filter = get_filter_function(csp);
2399 * Only write if we're not buffering for content modification
2401 if (!content_filter)
2404 * Write the server's (modified) header to
2405 * the client (along with anything else that
2406 * may be in the buffer)
2409 if (write_socket(csp->cfd, hdr, strlen(hdr))
2410 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
2412 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2415 * The write failed, so don't bother mentioning it
2416 * to the client... it probably can't hear us anyway.
2419 mark_server_socket_tainted(csp);
2424 /* we're finished with the server's header */
2430 * If this was a MS IIS/5 hack then it means the server
2431 * has already closed the connection. Nothing more to read.
2436 log_error(LOG_LEVEL_ERROR,
2437 "Closed server connection detected. "
2438 "Applying the MS IIS5 hack didn't help.");
2439 log_error(LOG_LEVEL_CLF,
2440 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2441 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2442 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2443 mark_server_socket_tainted(csp);
2449 mark_server_socket_tainted(csp);
2450 return; /* huh? we should never get here */
2453 if (csp->content_length == 0)
2456 * If Privoxy didn't recalculate the Content-Lenght,
2457 * byte_count is still correct.
2459 csp->content_length = byte_count;
2462 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2463 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2464 && (csp->expected_content_length != byte_count))
2466 log_error(LOG_LEVEL_CONNECT,
2467 "Received %llu bytes while expecting %llu.",
2468 byte_count, csp->expected_content_length);
2469 mark_server_socket_tainted(csp);
2473 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
2474 csp->ip_addr_str, http->ocmd, csp->content_length);
2476 csp->server_connection.timestamp = time(NULL);
2480 /*********************************************************************
2484 * Description : This is little more than chat. We only "serve" to
2485 * to close (or remember) any socket that chat may have
2489 * 1 : csp = Current client state (buffers, headers, etc...)
2493 *********************************************************************/
2495 void serve(struct client_state *csp)
2496 #else /* ifndef AMIGA */
2497 static void serve(struct client_state *csp)
2498 #endif /* def AMIGA */
2500 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2501 #ifdef FEATURE_CONNECTION_SHARING
2502 static int monitor_thread_running = 0;
2503 #endif /* def FEATURE_CONNECTION_SHARING */
2504 int continue_chatting = 0;
2508 unsigned int latency;
2512 latency = (unsigned)(csp->server_connection.response_received -
2513 csp->server_connection.request_sent) / 2;
2515 continue_chatting = (csp->config->feature_flags
2516 & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
2517 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
2518 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
2519 && (csp->cfd != JB_INVALID_SOCKET)
2520 && (csp->server_connection.sfd != JB_INVALID_SOCKET)
2521 && socket_is_still_usable(csp->server_connection.sfd);
2523 if (continue_chatting)
2525 if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
2527 csp->server_connection.keep_alive_timeout = csp->config->default_server_timeout;
2528 log_error(LOG_LEVEL_CONNECT,
2529 "The server didn't specify how long the connection will stay open. "
2530 "Assumed timeout is: %u.", csp->server_connection.keep_alive_timeout);
2532 continue_chatting = (latency < csp->server_connection.keep_alive_timeout);
2535 if (continue_chatting)
2537 unsigned int client_timeout;
2539 client_timeout = (unsigned)csp->server_connection.keep_alive_timeout - latency;
2541 log_error(LOG_LEVEL_CONNECT,
2542 "Waiting for the next client request on socket %d. "
2543 "Keeping the server socket %d to %s open.",
2544 csp->cfd, csp->server_connection.sfd, csp->server_connection.host);
2545 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
2546 && data_is_available(csp->cfd, (int)client_timeout)
2547 && socket_is_still_usable(csp->cfd))
2549 log_error(LOG_LEVEL_CONNECT, "Client request arrived in "
2550 "time or the client closed the connection on socket %d.",
2553 * Get the csp in a mostly vergin state again.
2554 * XXX: Should be done elsewhere.
2556 csp->content_type = 0;
2557 csp->content_length = 0;
2558 csp->expected_content_length = 0;
2559 csp->expected_client_content_length = 0;
2560 list_remove_all(csp->headers);
2561 freez(csp->iob->buf);
2562 memset(csp->iob, 0, sizeof(csp->iob));
2563 freez(csp->error_message);
2564 free_http_request(csp->http);
2565 destroy_list(csp->headers);
2566 destroy_list(csp->tags);
2567 free_current_action(csp->action);
2568 if (NULL != csp->fwd)
2570 unload_forward_spec(csp->fwd);
2574 /* XXX: Store per-connection flags someplace else. */
2575 csp->flags = CSP_FLAG_ACTIVE |
2576 (csp->flags & CSP_FLAG_TOGGLED_ON) | CSP_FLAG_REUSED_CLIENT_CONNECTION;
2580 log_error(LOG_LEVEL_CONNECT,
2581 "No additional client request received in time on socket %d.",
2583 #ifdef FEATURE_CONNECTION_SHARING
2584 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
2585 && (socket_is_still_usable(csp->server_connection.sfd)))
2587 time_t time_open = time(NULL) - csp->server_connection.timestamp;
2589 if (csp->server_connection.keep_alive_timeout < time_open + latency)
2594 remember_connection(&csp->server_connection);
2595 csp->server_connection.sfd = JB_INVALID_SOCKET;
2596 close_socket(csp->cfd);
2597 csp->cfd = JB_INVALID_SOCKET;
2598 privoxy_mutex_lock(&connection_reuse_mutex);
2599 if (!monitor_thread_running)
2601 monitor_thread_running = 1;
2602 privoxy_mutex_unlock(&connection_reuse_mutex);
2603 wait_for_alive_connections();
2604 privoxy_mutex_lock(&connection_reuse_mutex);
2605 monitor_thread_running = 0;
2607 privoxy_mutex_unlock(&connection_reuse_mutex);
2609 #endif /* def FEATURE_CONNECTION_SHARING */
2613 else if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2615 log_error(LOG_LEVEL_CONNECT,
2616 "The connection on server socket %d to %s isn't reusable. "
2617 "Closing.", csp->server_connection.sfd, csp->server_connection.host);
2619 } while (continue_chatting);
2623 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2625 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2627 #ifdef FEATURE_CONNECTION_SHARING
2628 if (csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
2630 forget_connection(csp->server_connection.sfd);
2632 #endif /* def FEATURE_CONNECTION_SHARING */
2633 close_socket(csp->server_connection.sfd);
2636 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2637 mark_connection_closed(&csp->server_connection);
2640 if (csp->cfd != JB_INVALID_SOCKET)
2642 close_socket(csp->cfd);
2645 csp->flags &= ~CSP_FLAG_ACTIVE;
2651 /*********************************************************************
2653 * Function : server_thread
2655 * Description : We only exist to call `serve' in a threaded environment.
2658 * 1 : data = Current client state (buffers, headers, etc...)
2660 * Returns : Always 0.
2662 *********************************************************************/
2663 static int32 server_thread(void *data)
2665 serve((struct client_state *) data);
2672 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2673 /*********************************************************************
2677 * Description : Print usage info & exit.
2679 * Parameters : Pointer to argv[0] for identifying ourselves
2683 *********************************************************************/
2684 static void usage(const char *myname)
2686 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2690 #endif /* defined(unix) */
2693 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
2694 #endif /* defined(unix) */
2695 "[--version] [configfile]\n"
2696 "Aborting\n", myname);
2701 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
2704 #ifdef MUTEX_LOCKS_AVAILABLE
2705 /*********************************************************************
2707 * Function : privoxy_mutex_lock
2709 * Description : Locks a mutex.
2712 * 1 : mutex = The mutex to lock.
2714 * Returns : Void. May exit in case of errors.
2716 *********************************************************************/
2717 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
2719 #ifdef FEATURE_PTHREAD
2720 int err = pthread_mutex_lock(mutex);
2723 if (mutex != &log_mutex)
2725 log_error(LOG_LEVEL_FATAL,
2726 "Mutex locking failed: %s.\n", strerror(err));
2731 EnterCriticalSection(mutex);
2732 #endif /* def FEATURE_PTHREAD */
2736 /*********************************************************************
2738 * Function : privoxy_mutex_unlock
2740 * Description : Unlocks a mutex.
2743 * 1 : mutex = The mutex to unlock.
2745 * Returns : Void. May exit in case of errors.
2747 *********************************************************************/
2748 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
2750 #ifdef FEATURE_PTHREAD
2751 int err = pthread_mutex_unlock(mutex);
2754 if (mutex != &log_mutex)
2756 log_error(LOG_LEVEL_FATAL,
2757 "Mutex unlocking failed: %s.\n", strerror(err));
2762 LeaveCriticalSection(mutex);
2763 #endif /* def FEATURE_PTHREAD */
2767 /*********************************************************************
2769 * Function : privoxy_mutex_init
2771 * Description : Prepares a mutex.
2774 * 1 : mutex = The mutex to initialize.
2776 * Returns : Void. May exit in case of errors.
2778 *********************************************************************/
2779 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
2781 #ifdef FEATURE_PTHREAD
2782 int err = pthread_mutex_init(mutex, 0);
2785 printf("Fatal error. Mutex initialization failed: %s.\n",
2790 InitializeCriticalSection(mutex);
2791 #endif /* def FEATURE_PTHREAD */
2793 #endif /* def MUTEX_LOCKS_AVAILABLE */
2795 /*********************************************************************
2797 * Function : initialize_mutexes
2799 * Description : Prepares mutexes if mutex support is available.
2803 * Returns : Void, exits in case of errors.
2805 *********************************************************************/
2806 static void initialize_mutexes(void)
2808 #ifdef MUTEX_LOCKS_AVAILABLE
2810 * Prepare global mutex semaphores
2812 privoxy_mutex_init(&log_mutex);
2813 privoxy_mutex_init(&log_init_mutex);
2814 privoxy_mutex_init(&connection_reuse_mutex);
2817 * XXX: The assumptions below are a bit naive
2818 * and can cause locks that aren't necessary.
2820 * For example older FreeBSD versions (< 6.x?)
2821 * have no gethostbyname_r, but gethostbyname is
2824 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
2825 privoxy_mutex_init(&resolver_mutex);
2826 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
2828 * XXX: should we use a single mutex for
2829 * localtime() and gmtime() as well?
2831 #ifndef HAVE_GMTIME_R
2832 privoxy_mutex_init(&gmtime_mutex);
2833 #endif /* ndef HAVE_GMTIME_R */
2835 #ifndef HAVE_LOCALTIME_R
2836 privoxy_mutex_init(&localtime_mutex);
2837 #endif /* ndef HAVE_GMTIME_R */
2840 privoxy_mutex_init(&rand_mutex);
2841 #endif /* ndef HAVE_RANDOM */
2842 #endif /* def MUTEX_LOCKS_AVAILABLE */
2846 /*********************************************************************
2850 * Description : Load the config file and start the listen loop.
2851 * This function is a lot more *sane* with the `load_config'
2852 * and `listen_loop' functions; although it stills does
2853 * a *little* too much for my taste.
2856 * 1 : argc = Number of parameters (including $0).
2857 * 2 : argv = Array of (char *)'s to the parameters.
2859 * Returns : 1 if : can't open config file, unrecognized directive,
2860 * stats requested in multi-thread mode, can't open the
2861 * log file, can't open the jar file, listen port is invalid,
2862 * any load fails, and can't bind port.
2864 * Else main never returns, the process must be signaled
2865 * to terminate execution. Or, on Windows, use the
2866 * "File", "Exit" menu option.
2868 *********************************************************************/
2870 int real_main(int argc, char **argv)
2872 int main(int argc, char **argv)
2876 unsigned int random_seed;
2878 struct passwd *pw = NULL;
2879 struct group *grp = NULL;
2882 char *pre_chroot_nslookup_to_load_resolver = NULL;
2889 #if !defined(_WIN32)
2896 /* Prepare mutexes if supported and necessary. */
2897 initialize_mutexes();
2899 /* Enable logging until further notice. */
2903 * Parse the command line arguments
2905 * XXX: simply printing usage information in case of
2906 * invalid arguments isn't particularly user friendly.
2908 while (++argc_pos < argc)
2911 /* Check to see if the service must be installed or uninstalled */
2912 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2914 const char *pName = argv[argc_pos] + 9;
2917 exit( (install_service(pName)) ? 0 : 1 );
2919 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2921 const char *pName = argv[argc_pos] + 11;
2924 exit((uninstall_service(pName)) ? 0 : 1);
2926 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2928 bRunAsService = TRUE;
2929 w32_set_service_cwd();
2930 atexit(w32_service_exit_notify);
2933 #endif /* defined(_WIN32) */
2936 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2938 if (strcmp(argv[argc_pos], "--help") == 0)
2943 else if(strcmp(argv[argc_pos], "--version") == 0)
2945 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2951 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2953 set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
2957 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2959 if (++argc_pos == argc) usage(argv[0]);
2960 pidfile = strdup(argv[argc_pos]);
2963 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2965 if (++argc_pos == argc) usage(argv[argc_pos]);
2967 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2970 if (NULL == (grp = getgrnam(p)))
2972 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2976 if (NULL == (pw = getpwnam(argv[argc_pos])))
2978 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2981 if (p != NULL) *--p = '\0';
2984 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
2986 if (++argc_pos == argc) usage(argv[0]);
2987 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
2990 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2994 #endif /* defined(unix) */
2996 else if (argc_pos + 1 != argc)
2999 * This is neither the last command line
3000 * option, nor was it recognized before,
3001 * therefore it must be invalid.
3007 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3009 configfile = argv[argc_pos];
3012 } /* -END- while (more arguments) */
3014 show_version(Argv[0]);
3017 if ( *configfile != '/' )
3019 char cwd[BUFFER_SIZE];
3021 size_t abs_file_size;
3023 /* make config-filename absolute here */
3024 if (NULL == getcwd(cwd, sizeof(cwd)))
3026 perror("failed to get current working directory");
3031 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3032 basedir = strdup(cwd);
3034 if (NULL == basedir ||
3035 NULL == (abs_file = malloc(abs_file_size)))
3037 perror("malloc failed");
3040 strlcpy(abs_file, basedir, abs_file_size);
3041 strlcat(abs_file, "/", abs_file_size );
3042 strlcat(abs_file, configfile, abs_file_size);
3043 configfile = abs_file;
3045 #endif /* defined unix */
3049 clients->next = NULL;
3051 /* XXX: factor out initialising after the next stable release. */
3054 #elif defined(_WIN32)
3058 random_seed = (unsigned int)time(NULL);
3060 srandom(random_seed);
3063 #endif /* ifdef HAVE_RANDOM */
3066 * Unix signal handling
3068 * Catch the abort, interrupt and terminate signals for a graceful exit
3069 * Catch the hangup signal so the errlog can be reopened.
3070 * Ignore the broken pipe signals (FIXME: Why?)
3072 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3075 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3076 const int ignored_signals[] = { SIGPIPE, 0 };
3078 for (idx = 0; catched_signals[idx] != 0; idx++)
3080 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3081 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3083 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3084 #endif /* ifdef sun */
3086 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3090 for (idx = 0; ignored_signals[idx] != 0; idx++)
3092 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3094 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3099 #else /* ifdef _WIN32 */
3100 # ifdef _WIN_CONSOLE
3102 * We *are* in a windows console app.
3103 * Print a verbose messages about FAQ's and such
3105 printf("%s", win32_blurb);
3106 # endif /* def _WIN_CONSOLE */
3107 #endif /* def _WIN32 */
3110 /* Initialize the CGI subsystem */
3111 cgi_init_error_messages();
3114 * If runnig on unix and without the --nodaemon
3115 * option, become a daemon. I.e. fork, detach
3116 * from tty and get process group leadership
3128 if ( pid < 0 ) /* error */
3133 else if ( pid != 0 ) /* parent */
3138 * must check for errors
3139 * child died due to missing files aso
3142 wpid = waitpid( pid, &status, WNOHANG );
3154 * stderr (fd 2) will be closed later on,
3155 * when the config file has been parsed.
3161 * Reserve fd 0 and 1 to prevent abort() and friends
3162 * from sending stuff to the clients or servers.
3164 fd = open("/dev/null", O_RDONLY);
3167 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
3171 if (dup2(fd, 0) == -1)
3173 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 0: %E");
3177 fd = open("/dev/null", O_WRONLY);
3180 log_error(LOG_LEVEL_FATAL, "Failed to open /dev/null: %E");
3184 if (dup2(fd, 1) == -1)
3186 log_error(LOG_LEVEL_FATAL, "Failed to reserve fd 1: %E");
3193 } /* -END- if (daemon_mode) */
3196 * As soon as we have written the PID file, we can switch
3197 * to the user and group ID indicated by the --user option
3203 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3205 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3209 if (setgroups(1, &grp->gr_gid))
3211 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
3214 else if (initgroups(pw->pw_name, pw->pw_gid))
3216 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
3222 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3224 /* Read the time zone file from /etc before doing chroot. */
3226 if (NULL != pre_chroot_nslookup_to_load_resolver
3227 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3229 /* Initialize resolver library. */
3230 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3232 if (chroot(pw->pw_dir) < 0)
3234 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3238 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3241 if (setuid(pw->pw_uid))
3243 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3247 char putenv_dummy[64];
3249 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3250 if (putenv(putenv_dummy) != 0)
3252 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3255 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3256 if (putenv(putenv_dummy) != 0)
3258 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3264 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3267 #endif /* defined unix */
3270 /* This will be FALSE unless the command line specified --service
3274 /* Yup, so now we must attempt to establish a connection
3275 * with the service dispatcher. This will only work if this
3276 * process was launched by the service control manager to
3277 * actually run as a service. If this isn't the case, i've
3278 * known it take around 30 seconds or so for the call to return.
3281 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3282 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3284 /* Service has run, and at this point is now being stopped, so just return */
3289 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3291 /* An error occurred. Usually it's because --service was wrongly specified
3292 * and we were unable to connect to the Service Control Dispatcher because
3293 * it wasn't expecting us and is therefore not listening.
3295 * For now, just continue below to call the listen_loop function.
3298 #endif /* def _WIN32 */
3308 /*********************************************************************
3310 * Function : bind_port_helper
3312 * Description : Bind the listen port. Handles logging, and aborts
3316 * 1 : config = Privoxy configuration. Specifies port
3319 * Returns : Port that was opened.
3321 *********************************************************************/
3322 static jb_socket bind_port_helper(struct configuration_spec * config)
3327 if (config->haddr == NULL)
3329 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3334 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3335 config->hport, config->haddr);
3338 result = bind_port(config->haddr, config->hport, &bfd);
3345 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3346 "There may be another Privoxy or some other "
3347 "proxy running on port %d",
3348 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3349 config->hport, config->hport);
3352 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3353 "The hostname is not resolvable",
3354 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3357 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: %E",
3358 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3361 /* shouldn't get here */
3362 return JB_INVALID_SOCKET;
3365 config->need_bind = 0;
3372 /* Without this simple workaround we get this compiler warning from _beginthread
3373 * warning C4028: formal parameter 1 different from declaration
3375 void w32_service_listen_loop(void *p)
3379 #endif /* def _WIN32 */
3382 /*********************************************************************
3384 * Function : listen_loop
3386 * Description : bind the listen port and enter a "FOREVER" listening loop.
3392 *********************************************************************/
3393 static void listen_loop(void)
3395 struct client_state *csp = NULL;
3397 struct configuration_spec *config;
3398 unsigned int active_threads = 0;
3400 config = load_config();
3402 #ifdef FEATURE_CONNECTION_SHARING
3404 * XXX: Should be relocated once it no
3405 * longer needs to emit log messages.
3407 initialize_reusable_connections();
3408 #endif /* def FEATURE_CONNECTION_SHARING */
3410 bfd = bind_port_helper(config);
3412 #ifdef FEATURE_GRACEFUL_TERMINATION
3413 while (!g_terminate)
3418 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3419 while (waitpid(-1, NULL, WNOHANG) > 0)
3421 /* zombie children */
3423 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3426 * Free data that was used by died threads
3428 active_threads = sweep();
3432 * Re-open the errlog after HUP signal
3434 if (received_hup_signal)
3436 if (NULL != config->logfile)
3438 init_error_log(Argv[0], config->logfile);
3440 received_hup_signal = 0;
3444 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3446 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3450 csp->flags |= CSP_FLAG_ACTIVE;
3451 csp->server_connection.sfd = JB_INVALID_SOCKET;
3453 csp->config = config = load_config();
3455 if ( config->need_bind )
3458 * Since we were listening to the "old port", we will not see
3459 * a "listen" param change until the next request. So, at
3460 * least 1 more request must be made for us to find the new
3461 * setting. I am simply closing the old socket and binding the
3464 * Which-ever is correct, we will serve 1 more page via the
3465 * old settings. This should probably be a "show-proxy-args"
3466 * request. This should not be a so common of an operation
3467 * that this will hurt people's feelings.
3472 bfd = bind_port_helper(config);
3475 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3477 if (!accept_connection(csp, bfd))
3479 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3492 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3495 #ifdef FEATURE_TOGGLE
3496 if (global_toggle_state)
3497 #endif /* def FEATURE_TOGGLE */
3499 csp->flags |= CSP_FLAG_TOGGLED_ON;
3502 if (run_loader(csp))
3504 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3505 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3509 if (block_acl(NULL,csp))
3511 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
3512 close_socket(csp->cfd);
3513 freez(csp->ip_addr_str);
3517 #endif /* def FEATURE_ACL */
3519 if ((0 != config->max_client_connections)
3520 && (active_threads >= config->max_client_connections))
3522 log_error(LOG_LEVEL_CONNECT,
3523 "Rejecting connection from %s. Maximum number of connections reached.",
3525 write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
3526 strlen(TOO_MANY_CONNECTIONS_RESPONSE));
3527 close_socket(csp->cfd);
3528 freez(csp->ip_addr_str);
3533 /* add it to the list of clients */
3534 csp->next = clients->next;
3535 clients->next = csp;
3537 if (config->multi_threaded)
3541 /* this is a switch () statment in the C preprocessor - ugh */
3542 #undef SELECTED_ONE_OPTION
3544 /* Use Pthreads in preference to native code */
3545 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3546 #define SELECTED_ONE_OPTION
3548 pthread_t the_thread;
3549 pthread_attr_t attrs;
3551 pthread_attr_init(&attrs);
3552 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3553 errno = pthread_create(&the_thread, &attrs,
3554 (void * (*)(void *))serve, csp);
3555 child_id = errno ? -1 : 0;
3556 pthread_attr_destroy(&attrs);
3560 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3561 #define SELECTED_ONE_OPTION
3562 child_id = _beginthread(
3563 (void (*)(void *))serve,
3568 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3569 #define SELECTED_ONE_OPTION
3570 child_id = _beginthread(
3571 (void(* _Optlink)(void*))serve,
3577 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3578 #define SELECTED_ONE_OPTION
3580 thread_id tid = spawn_thread
3581 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3583 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3585 child_id = (int) tid;
3594 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3595 #define SELECTED_ONE_OPTION
3596 csp->cfd = ReleaseSocket(csp->cfd, -1);
3599 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3600 NP_Output, Output(),
3601 NP_CloseOutput, FALSE,
3602 NP_Name, (ULONG)"privoxy child",
3606 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3607 NP_Output, Output(),
3608 NP_CloseOutput, FALSE,
3609 NP_Name, (ULONG)"privoxy child",
3610 NP_StackSize, 200*1024,
3616 ((struct Task *)child_id)->tc_UserData = csp;
3617 Signal((struct Task *)child_id, SIGF_SINGLE);
3622 #if !defined(SELECTED_ONE_OPTION)
3625 /* This block is only needed when using fork().
3626 * When using threads, the server thread was
3627 * created and run by the call to _beginthread().
3629 if (child_id == 0) /* child */
3632 #ifdef FEATURE_TOGGLE
3633 int inherited_toggle_state = global_toggle_state;
3634 #endif /* def FEATURE_TOGGLE */
3639 * If we've been toggled or we've blocked the request, tell Mom
3642 #ifdef FEATURE_TOGGLE
3643 if (inherited_toggle_state != global_toggle_state)
3645 rc |= RC_FLAG_TOGGLED;
3647 #endif /* def FEATURE_TOGGLE */
3649 #ifdef FEATURE_STATISTICS
3650 if (csp->flags & CSP_FLAG_REJECTED)
3652 rc |= RC_FLAG_BLOCKED;
3654 #endif /* ndef FEATURE_STATISTICS */
3658 else if (child_id > 0) /* parent */
3660 /* in a fork()'d environment, the parent's
3661 * copy of the client socket and the CSP
3665 #if !defined(_WIN32) && !defined(__CYGWIN__)
3667 wait( &child_status );
3670 * Evaluate child's return code: If the child has
3671 * - been toggled, toggle ourselves
3672 * - blocked its request, bump up the stats counter
3675 #ifdef FEATURE_TOGGLE
3676 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
3678 global_toggle_state = !global_toggle_state;
3680 #endif /* def FEATURE_TOGGLE */
3682 #ifdef FEATURE_STATISTICS
3684 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
3688 #endif /* def FEATURE_STATISTICS */
3690 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
3691 close_socket(csp->cfd);
3692 csp->flags &= ~CSP_FLAG_ACTIVE;
3696 #undef SELECTED_ONE_OPTION
3697 /* end of cpp switch () */
3702 * Spawning the child failed, assume it's because
3703 * there are too many children running already.
3704 * XXX: If you assume ...
3706 log_error(LOG_LEVEL_ERROR,
3707 "Unable to take any additional connections: %E");
3708 write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
3709 strlen(TOO_MANY_CONNECTIONS_RESPONSE));
3710 close_socket(csp->cfd);
3711 csp->flags &= ~CSP_FLAG_ACTIVE;
3720 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
3722 /* Clean up. Aim: free all memory (no leaks) */
3723 #ifdef FEATURE_GRACEFUL_TERMINATION
3725 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
3727 unload_current_config_file();
3728 unload_current_actions_file();
3729 unload_current_re_filterfile();
3730 #ifdef FEATURE_TRUST
3731 unload_current_trust_file();
3734 if (config->multi_threaded)
3741 } while ((clients->next != NULL) && (--i > 0));
3745 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
3756 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
3757 /* Cleanup - remove taskbar icon etc. */
3762 #endif /* FEATURE_GRACEFUL_TERMINATION */