1 const char jcc_rcs[] = "$Id: jcc.c,v 1.298 2009/10/04 15:34:17 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 /* Write the answer to the client */
728 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
729 || write_socket(csp->cfd, rsp->body, rsp->content_length))
731 /* There is nothing we can do about it. */
732 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
735 /* Log that the request was crunched and why. */
736 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
737 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %u",
738 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
740 /* Clean up and return */
741 if (cgi_error_memory() != rsp)
743 free_http_response(rsp);
750 /*********************************************************************
752 * Function : request_contains_null_bytes
754 * Description : Checks for NULL bytes in the request and sends
755 * an error message to the client if any were found.
757 * XXX: currently not used, see comment in chat().
760 * 1 : csp = Current client state (buffers, headers, etc...)
761 * 2 : buf = Data from the client's request to check.
762 * 3 : len = The data length.
764 * Returns : TRUE if the request contained one or more NULL bytes, or
767 *********************************************************************/
768 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
770 size_t c_len; /* Request lenght when treated as C string */
777 * Null byte(s) found. Log the request,
778 * return an error response and hang up.
780 size_t tmp_len = c_len;
785 * Replace NULL byte(s) with '°' characters
786 * so the request can be logged as string.
787 * XXX: Is there a better replacement character?
790 tmp_len += strlen(buf+tmp_len);
791 } while (tmp_len < len);
793 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
794 "(length=%d, strlen=%u).", csp->ip_addr_str, len, c_len);
795 log_error(LOG_LEVEL_HEADER,
796 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
798 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
800 /* XXX: Log correct size */
801 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
811 /*********************************************************************
813 * Function : crunch_response_triggered
815 * Description : Checks if the request has to be crunched,
816 * and delivers the crunch response if necessary.
819 * 1 : csp = Current client state (buffers, headers, etc...)
820 * 2 : crunchers = list of cruncher functions to run
822 * Returns : TRUE if the request was answered with a crunch response
825 *********************************************************************/
826 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
828 struct http_response *rsp = NULL;
829 const struct cruncher *c;
832 * If CGI request crunching is disabled,
833 * check the CGI dispatcher out of order to
834 * prevent unintentional blocks or redirects.
836 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
837 && (NULL != (rsp = dispatch_cgi(csp))))
839 /* Deliver, log and free the interception response. */
840 send_crunch_response(csp, rsp);
844 for (c = crunchers; c->cruncher != NULL; c++)
847 * Check the cruncher if either Privoxy is toggled
848 * on and the request isn't forced, or if the cruncher
849 * applies to forced requests as well.
851 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
852 !(csp->flags & CSP_FLAG_FORCED)) ||
853 (c->flags & CF_IGNORE_FORCE))
855 rsp = c->cruncher(csp);
858 /* Deliver, log and free the interception response. */
859 send_crunch_response(csp, rsp);
860 #ifdef FEATURE_STATISTICS
861 if (c->flags & CF_COUNT_AS_REJECT)
863 csp->flags |= CSP_FLAG_REJECTED;
865 #endif /* def FEATURE_STATISTICS */
876 /*********************************************************************
878 * Function : build_request_line
880 * Description : Builds the HTTP request line.
882 * If a HTTP forwarder is used it expects the whole URL,
883 * web servers only get the path.
886 * 1 : csp = Current client state (buffers, headers, etc...)
887 * 2 : fwd = The forwarding spec used for the request
888 * XXX: Should use http->fwd instead.
889 * 3 : request_line = The old request line which will be replaced.
891 * Returns : Nothing. Terminates in case of memory problems.
893 *********************************************************************/
894 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
896 struct http_request *http = csp->http;
898 assert(http->ssl == 0);
901 * Downgrade http version from 1.1 to 1.0
902 * if +downgrade action applies.
904 if ( (csp->action->flags & ACTION_DOWNGRADE)
905 && (!strcmpic(http->ver, "HTTP/1.1")))
908 http->ver = strdup("HTTP/1.0");
910 if (http->ver == NULL)
912 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
917 * Rebuild the request line.
919 freez(*request_line);
920 *request_line = strdup(http->gpc);
921 string_append(request_line, " ");
923 if (fwd->forward_host)
925 string_append(request_line, http->url);
929 string_append(request_line, http->path);
931 string_append(request_line, " ");
932 string_append(request_line, http->ver);
934 if (*request_line == NULL)
936 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
938 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
942 /*********************************************************************
944 * Function : change_request_destination
946 * Description : Parse a (rewritten) request line and regenerate
947 * the http request data.
950 * 1 : csp = Current client state (buffers, headers, etc...)
952 * Returns : Forwards the parse_http_request() return code.
953 * Terminates in case of memory problems.
955 *********************************************************************/
956 static jb_err change_request_destination(struct client_state *csp)
958 struct http_request *http = csp->http;
961 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
962 free_http_request(http);
963 err = parse_http_request(csp->headers->first->str, http);
964 if (JB_ERR_OK != err)
966 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
967 jb_err_to_string(err));
971 /* XXX: ocmd is a misleading name */
972 http->ocmd = strdup(http->cmd);
973 if (http->ocmd == NULL)
975 log_error(LOG_LEVEL_FATAL,
976 "Out of memory copying rewritten HTTP request line");
984 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
985 /*********************************************************************
987 * Function : server_response_is_complete
989 * Description : Determines whether we should stop reading
990 * from the server socket.
993 * 1 : csp = Current client state (buffers, headers, etc...)
994 * 2 : content_length = Length of content received so far.
996 * Returns : TRUE if the response is complete,
999 *********************************************************************/
1000 static int server_response_is_complete(struct client_state *csp,
1001 unsigned long long content_length)
1003 int content_length_known = !!(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
1005 if (!strcmpic(csp->http->gpc, "HEAD"))
1008 * "HEAD" implies no body, we are thus expecting
1009 * no content. XXX: incomplete "list" of methods?
1011 csp->expected_content_length = 0;
1012 content_length_known = TRUE;
1015 if (csp->http->status == 304)
1018 * Expect no body. XXX: incomplete "list" of status codes?
1020 csp->expected_content_length = 0;
1021 content_length_known = TRUE;
1024 return (content_length_known && ((0 == csp->expected_content_length)
1025 || (csp->expected_content_length <= content_length)));
1029 #ifdef FEATURE_CONNECTION_SHARING
1030 /*********************************************************************
1032 * Function : wait_for_alive_connections
1034 * Description : Waits for alive connections to timeout.
1040 *********************************************************************/
1041 static void wait_for_alive_connections(void)
1043 int connections_alive = close_unusable_connections();
1045 while (0 < connections_alive)
1047 log_error(LOG_LEVEL_CONNECT,
1048 "Waiting for %d connections to timeout.",
1051 connections_alive = close_unusable_connections();
1054 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
1057 #endif /* def FEATURE_CONNECTION_SHARING */
1060 /*********************************************************************
1062 * Function : save_connection_destination
1064 * Description : Remembers a connection for reuse later on.
1067 * 1 : sfd = Open socket to remember.
1068 * 2 : http = The destination for the connection.
1069 * 3 : fwd = The forwarder settings used.
1070 * 3 : server_connection = storage.
1074 *********************************************************************/
1075 void save_connection_destination(jb_socket sfd,
1076 const struct http_request *http,
1077 const struct forward_spec *fwd,
1078 struct reusable_connection *server_connection)
1080 assert(sfd != JB_INVALID_SOCKET);
1081 assert(NULL != http->host);
1083 server_connection->sfd = sfd;
1084 server_connection->host = strdup(http->host);
1085 if (NULL == server_connection->host)
1087 log_error(LOG_LEVEL_FATAL, "Out of memory saving socket.");
1089 server_connection->port = http->port;
1091 assert(NULL != fwd);
1092 assert(server_connection->gateway_host == NULL);
1093 assert(server_connection->gateway_port == 0);
1094 assert(server_connection->forwarder_type == 0);
1095 assert(server_connection->forward_host == NULL);
1096 assert(server_connection->forward_port == 0);
1098 server_connection->forwarder_type = fwd->type;
1099 if (NULL != fwd->gateway_host)
1101 server_connection->gateway_host = strdup(fwd->gateway_host);
1102 if (NULL == server_connection->gateway_host)
1104 log_error(LOG_LEVEL_FATAL, "Out of memory saving gateway_host.");
1109 server_connection->gateway_host = NULL;
1111 server_connection->gateway_port = fwd->gateway_port;
1113 if (NULL != fwd->forward_host)
1115 server_connection->forward_host = strdup(fwd->forward_host);
1116 if (NULL == server_connection->forward_host)
1118 log_error(LOG_LEVEL_FATAL, "Out of memory saving forward_host.");
1123 server_connection->forward_host = NULL;
1125 server_connection->forward_port = fwd->forward_port;
1129 /*********************************************************************
1131 * Function : verify_request_length
1133 * Description : Checks if we already got the whole client requests
1134 * and sets CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ if
1137 * Data that doesn't belong to the current request is
1138 * thrown away to let the client retry on a clean socket.
1140 * XXX: This is a hack until we can deal with multiple
1141 * pipelined requests at the same time.
1145 * 1 : csp = Current client state (buffers, headers, etc...)
1149 *********************************************************************/
1150 static void verify_request_length(struct client_state *csp)
1152 unsigned long long buffered_request_bytes =
1153 (unsigned long long)(csp->iob->eod - csp->iob->cur);
1155 if ((csp->expected_client_content_length != 0)
1156 && (buffered_request_bytes != 0))
1158 if (csp->expected_client_content_length >= buffered_request_bytes)
1160 csp->expected_client_content_length -= buffered_request_bytes;
1161 log_error(LOG_LEVEL_CONNECT, "Reduced expected bytes to %llu "
1162 "to account for the %llu ones we already got.",
1163 csp->expected_client_content_length, buffered_request_bytes);
1167 assert(csp->iob->eod > csp->iob->cur + csp->expected_client_content_length);
1168 csp->iob->eod = csp->iob->cur + csp->expected_client_content_length;
1169 log_error(LOG_LEVEL_CONNECT, "Reducing expected bytes to 0. "
1170 "Marking the server socket tainted after throwing %llu bytes away.",
1171 buffered_request_bytes - csp->expected_client_content_length);
1172 csp->expected_client_content_length = 0;
1173 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1176 if (csp->expected_client_content_length == 0)
1178 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1182 if (!(csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ)
1183 && ((csp->iob->cur[0] != '\0') || (csp->expected_client_content_length != 0)))
1185 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1186 if (strcmpic(csp->http->gpc, "GET")
1187 && strcmpic(csp->http->gpc, "HEAD")
1188 && strcmpic(csp->http->gpc, "TRACE")
1189 && strcmpic(csp->http->gpc, "OPTIONS")
1190 && strcmpic(csp->http->gpc, "DELETE"))
1192 /* XXX: this is an incomplete hack */
1193 csp->flags &= ~CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1194 log_error(LOG_LEVEL_CONNECT,
1195 "There might be a request body. The connection will not be kept alive.");
1199 /* XXX: and so is this */
1200 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1201 log_error(LOG_LEVEL_CONNECT,
1202 "Possible pipeline attempt detected. The connection will not "
1203 "be kept alive and we will only serve the first request.");
1204 /* Nuke the pipelined requests from orbit, just to be sure. */
1205 csp->iob->buf[0] = '\0';
1206 csp->iob->eod = csp->iob->cur = csp->iob->buf;
1211 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
1212 log_error(LOG_LEVEL_CONNECT, "Complete client request received.");
1215 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1218 /*********************************************************************
1220 * Function : mark_server_socket_tainted
1222 * Description : Makes sure we don't reuse a server socket
1223 * (if we didn't read everything the server sent
1224 * us reusing the socket would lead to garbage).
1227 * 1 : csp = Current client state (buffers, headers, etc...)
1231 *********************************************************************/
1232 static void mark_server_socket_tainted(struct client_state *csp)
1234 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
1235 && !(csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED))
1237 log_error(LOG_LEVEL_CONNECT,
1238 "Marking the server socket %d tainted.",
1239 csp->server_connection.sfd);
1240 csp->flags |= CSP_FLAG_SERVER_SOCKET_TAINTED;
1244 /*********************************************************************
1246 * Function : get_request_line
1248 * Description : Read the client request line.
1251 * 1 : csp = Current client state (buffers, headers, etc...)
1253 * Returns : Pointer to request line or NULL in case of errors.
1255 *********************************************************************/
1256 static char *get_request_line(struct client_state *csp)
1258 char buf[BUFFER_SIZE];
1259 char *request_line = NULL;
1262 memset(buf, 0, sizeof(buf));
1266 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1268 log_error(LOG_LEVEL_ERROR,
1269 "Stopped waiting for the request line.");
1270 write_socket(csp->cfd, CLIENT_CONNECTION_TIMEOUT_RESPONSE,
1271 strlen(CLIENT_CONNECTION_TIMEOUT_RESPONSE));
1275 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1277 if (len <= 0) return NULL;
1280 * If there is no memory left for buffering the
1281 * request, there is nothing we can do but hang up
1283 if (add_to_iob(csp, buf, len))
1288 request_line = get_header(csp->iob);
1290 } while ((NULL != request_line) && ('\0' == *request_line));
1292 return request_line;
1297 /*********************************************************************
1299 * Function : receive_client_request
1301 * Description : Read the client's request (more precisely the
1302 * client headers) and answer it if necessary.
1304 * Note that since we're not using select() we could get
1305 * blocked here if a client connected, then didn't say
1309 * 1 : csp = Current client state (buffers, headers, etc...)
1311 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
1313 *********************************************************************/
1314 static jb_err receive_client_request(struct client_state *csp)
1316 char buf[BUFFER_SIZE];
1319 struct http_request *http;
1323 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1324 struct list header_list;
1325 struct list *headers = &header_list;
1329 memset(buf, 0, sizeof(buf));
1331 req = get_request_line(csp);
1334 mark_server_socket_tainted(csp);
1335 return JB_ERR_PARSE;
1337 assert(*req != '\0');
1339 if (client_protocol_is_unsupported(csp, req))
1341 return JB_ERR_PARSE;
1344 #ifdef FEATURE_FORCE_LOAD
1346 * If this request contains the FORCE_PREFIX and blocks
1347 * aren't enforced, get rid of it and set the force flag.
1349 if (strstr(req, FORCE_PREFIX))
1351 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
1353 log_error(LOG_LEVEL_FORCE,
1354 "Ignored force prefix in request: \"%s\".", req);
1358 strclean(req, FORCE_PREFIX);
1359 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
1360 csp->flags |= CSP_FLAG_FORCED;
1363 #endif /* def FEATURE_FORCE_LOAD */
1365 err = parse_http_request(req, http);
1367 if (JB_ERR_OK != err)
1369 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1370 /* XXX: Use correct size */
1371 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1372 log_error(LOG_LEVEL_ERROR,
1373 "Couldn't parse request line received from %s: %s",
1374 csp->ip_addr_str, jb_err_to_string(err));
1376 free_http_request(http);
1377 return JB_ERR_PARSE;
1380 /* grab the rest of the client's headers */
1384 p = get_header(csp->iob);
1388 /* There are no additional headers to read. */
1395 * We didn't receive a complete header
1396 * line yet, get the rest of it.
1398 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1400 log_error(LOG_LEVEL_ERROR,
1401 "Stopped grabbing the client headers.");
1402 destroy_list(headers);
1403 return JB_ERR_PARSE;
1406 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1409 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1410 destroy_list(headers);
1411 return JB_ERR_PARSE;
1414 if (add_to_iob(csp, buf, len))
1417 * If there is no memory left for buffering the
1418 * request, there is nothing we can do but hang up
1420 destroy_list(headers);
1421 return JB_ERR_MEMORY;
1427 * We were able to read a complete
1428 * header and can finaly enlist it.
1435 if (http->host == NULL)
1438 * If we still don't know the request destination,
1439 * the request is invalid or the client uses
1440 * Privoxy without its knowledge.
1442 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1445 * Our attempts to get the request destination
1446 * elsewhere failed or Privoxy is configured
1447 * to only accept proxy requests.
1449 * An error response has already been send
1450 * and we're done here.
1452 return JB_ERR_PARSE;
1457 * Determine the actions for this URL
1459 #ifdef FEATURE_TOGGLE
1460 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1462 /* Most compatible set of actions (i.e. none) */
1463 init_current_action(csp->action);
1466 #endif /* ndef FEATURE_TOGGLE */
1468 get_url_actions(csp, http);
1472 * Save a copy of the original request for logging
1474 http->ocmd = strdup(http->cmd);
1475 if (http->ocmd == NULL)
1477 log_error(LOG_LEVEL_FATAL,
1478 "Out of memory copying HTTP request line");
1480 enlist(csp->headers, http->cmd);
1482 /* Append the previously read headers */
1483 list_append_list_unique(csp->headers, headers);
1484 destroy_list(headers);
1491 /*********************************************************************
1493 * Function : parse_client_request
1495 * Description : Parses the client's request and decides what to do
1498 * Note that since we're not using select() we could get
1499 * blocked here if a client connected, then didn't say
1503 * 1 : csp = Current client state (buffers, headers, etc...)
1505 * Returns : JB_ERR_OK or JB_ERR_PARSE
1507 *********************************************************************/
1508 static jb_err parse_client_request(struct client_state *csp)
1510 struct http_request *http = csp->http;
1513 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1514 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
1515 && (!strcmpic(csp->http->ver, "HTTP/1.1"))
1516 && (csp->http->ssl == 0))
1518 /* Assume persistence until further notice */
1519 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
1521 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1523 err = sed(csp, FILTER_CLIENT_HEADERS);
1524 if (JB_ERR_OK != err)
1526 /* XXX: Should be handled in sed(). */
1527 assert(err == JB_ERR_PARSE);
1528 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
1530 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
1532 /* Check request line for rewrites. */
1533 if ((NULL == csp->headers->first->str)
1534 || (strcmp(http->cmd, csp->headers->first->str) &&
1535 (JB_ERR_OK != change_request_destination(csp))))
1538 * A header filter broke the request line - bail out.
1540 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
1541 /* XXX: Use correct size */
1542 log_error(LOG_LEVEL_CLF,
1543 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
1544 log_error(LOG_LEVEL_ERROR,
1545 "Invalid request line after applying header filters.");
1546 free_http_request(http);
1548 return JB_ERR_PARSE;
1551 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1552 if (csp->http->ssl == 0)
1554 verify_request_length(csp);
1556 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1563 /*********************************************************************
1567 * Description : Once a connection to the client has been accepted,
1568 * this function is called (via serve()) to handle the
1569 * main business of the communication. When this
1570 * function returns, the caller must close the client
1573 * FIXME: chat is nearly thousand lines long.
1577 * 1 : csp = Current client state (buffers, headers, etc...)
1579 * Returns : Nothing.
1581 *********************************************************************/
1582 static void chat(struct client_state *csp)
1584 char buf[BUFFER_SIZE];
1591 int ms_iis5_hack = 0;
1592 unsigned long long byte_count = 0;
1593 int forwarded_connect_retries = 0;
1594 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1595 const struct forward_spec *fwd;
1596 struct http_request *http;
1597 long len = 0; /* for buffer sizes (and negative error codes) */
1599 /* Function that does the content filtering for the current request */
1600 filter_function_ptr content_filter = NULL;
1602 /* Skeleton for HTTP response, if we should intercept the request */
1603 struct http_response *rsp;
1604 struct timeval timeout;
1605 int watch_client_socket = 1;
1607 memset(buf, 0, sizeof(buf));
1611 if (receive_client_request(csp) != JB_ERR_OK)
1615 if (parse_client_request(csp) != JB_ERR_OK)
1620 /* decide how to route the HTTP request */
1621 fwd = forward_url(csp, http);
1624 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1625 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1630 * build the http request to send to the server
1631 * we have to do one of the following:
1633 * create = use the original HTTP request to create a new
1634 * HTTP request that has either the path component
1635 * without the http://domainspec (w/path) or the
1636 * full orininal URL (w/url)
1637 * Note that the path and/or the HTTP version may
1638 * have been altered by now.
1640 * connect = Open a socket to the host:port of the server
1641 * and short-circuit server and client socket.
1643 * pass = Pass the request unchanged if forwarding a CONNECT
1644 * request to a parent proxy. Note that we'll be sending
1645 * the CFAIL message ourselves if connecting to the parent
1646 * fails, but we won't send a CSUCCEED message if it works,
1647 * since that would result in a double message (ours and the
1648 * parent's). After sending the request to the parent, we simply
1651 * here's the matrix:
1654 * +--------+--------+
1656 * 0 | create | connect|
1658 * Forwarding +--------+--------+
1660 * 1 | create | pass |
1662 * +--------+--------+
1666 if (http->ssl && connect_port_is_forbidden(csp))
1668 const char *acceptable_connect_ports =
1669 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
1670 assert(NULL != acceptable_connect_ports);
1671 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
1672 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
1673 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
1674 csp->action->flags |= ACTION_BLOCK;
1680 freez(csp->headers->first->str);
1681 build_request_line(csp, fwd, &csp->headers->first->str);
1685 * We have a request. Check if one of the crunchers wants it.
1687 if (crunch_response_triggered(csp, crunchers_all))
1690 * Yes. The client got the crunch response
1691 * and we are done here after cleaning up.
1693 /* XXX: why list_remove_all()? */
1694 list_remove_all(csp->headers);
1699 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1701 if (fwd->forward_host)
1703 log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
1704 fwd->forward_host, fwd->forward_port, http->hostport);
1708 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1711 /* here we connect to the server, gateway, or the forwarder */
1713 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1714 if ((csp->server_connection.sfd != JB_INVALID_SOCKET)
1715 && socket_is_still_usable(csp->server_connection.sfd)
1716 && connection_destination_matches(&csp->server_connection, http, fwd))
1718 log_error(LOG_LEVEL_CONNECT,
1719 "Reusing server socket %u. Opened for %s.",
1720 csp->server_connection.sfd, csp->server_connection.host);
1724 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
1726 log_error(LOG_LEVEL_CONNECT,
1727 "Closing server socket %u. Opened for %s.",
1728 csp->server_connection.sfd, csp->server_connection.host);
1729 close_socket(csp->server_connection.sfd);
1730 mark_connection_closed(&csp->server_connection);
1732 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1734 while ((csp->server_connection.sfd = forwarded_connect(fwd, http, csp))
1735 && (errno == EINVAL)
1736 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1738 log_error(LOG_LEVEL_ERROR,
1739 "failed request #%u to connect to %s. Trying again.",
1740 forwarded_connect_retries, http->hostport);
1743 if (csp->server_connection.sfd == JB_INVALID_SOCKET)
1745 if (fwd->type != SOCKS_NONE)
1748 rsp = error_response(csp, "forwarding-failed");
1750 else if (errno == EINVAL)
1752 rsp = error_response(csp, "no-such-domain");
1756 rsp = error_response(csp, "connect-failed");
1757 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1761 /* Write the answer to the client */
1764 send_crunch_response(csp, rsp);
1769 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1770 save_connection_destination(csp->server_connection.sfd,
1771 http, fwd, &csp->server_connection);
1772 csp->server_connection.keep_alive_timeout =
1773 (unsigned)csp->config->keep_alive_timeout;
1775 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1777 hdr = list_to_text(csp->headers);
1780 /* FIXME Should handle error properly */
1781 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1783 list_remove_all(csp->headers);
1785 if (fwd->forward_host || (http->ssl == 0))
1788 * Write the client's (modified) header to the server
1789 * (along with anything else that may be in the buffer)
1791 if (write_socket(csp->server_connection.sfd, hdr, strlen(hdr))
1792 || (flush_socket(csp->server_connection.sfd, csp->iob) < 0))
1794 log_error(LOG_LEVEL_CONNECT,
1795 "write header to: %s failed: %E", http->hostport);
1797 rsp = error_response(csp, "connect-failed");
1800 send_crunch_response(csp, rsp);
1810 * We're running an SSL tunnel and we're not forwarding,
1811 * so just send the "connect succeeded" message to the
1812 * client, flush the rest, and get out of the way.
1814 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
1822 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
1824 csp->server_connection.request_sent = time(NULL);
1826 /* we're finished with the client's header */
1829 maxfd = (csp->cfd > csp->server_connection.sfd) ?
1830 csp->cfd : csp->server_connection.sfd;
1832 /* pass data between the client and server
1833 * until one or the other shuts down the connection.
1842 * FD_ZERO here seems to point to an errant macro which crashes.
1843 * So do this by hand for now...
1845 memset(&rfds,0x00,sizeof(fd_set));
1849 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1850 if (!watch_client_socket)
1852 maxfd = csp->server_connection.sfd;
1855 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1857 FD_SET(csp->cfd, &rfds);
1860 FD_SET(csp->server_connection.sfd, &rfds);
1862 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1863 if ((csp->flags & CSP_FLAG_CHUNKED)
1864 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
1865 && ((csp->iob->eod - csp->iob->cur) >= 5)
1866 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
1868 log_error(LOG_LEVEL_CONNECT,
1869 "Looks like we read the last chunk together with "
1870 "the server headers. We better stop reading.");
1871 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
1872 csp->expected_content_length = byte_count;
1873 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
1875 if (server_body && server_response_is_complete(csp, byte_count))
1877 if (csp->expected_content_length == byte_count)
1879 log_error(LOG_LEVEL_CONNECT,
1880 "Done reading from server. Content length: %llu as expected. "
1881 "Bytes most recently read: %d.",
1886 log_error(LOG_LEVEL_CONNECT,
1887 "Done reading from server. Expected content length: %llu. "
1888 "Actual content length: %llu. Bytes most recently read: %d.",
1889 csp->expected_content_length, byte_count, len);
1893 * XXX: should not jump around,
1894 * chat() is complicated enough already.
1898 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1900 timeout.tv_sec = csp->config->socket_timeout;
1901 timeout.tv_usec = 0;
1902 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
1906 log_error(LOG_LEVEL_ERROR,
1907 "Didn't receive data in time: %s", http->url);
1908 if ((byte_count == 0) && (http->ssl == 0))
1910 send_crunch_response(csp, error_response(csp, "connection-timeout"));
1912 mark_server_socket_tainted(csp);
1917 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1918 mark_server_socket_tainted(csp);
1923 * This is the body of the browser's request,
1924 * just read and write it.
1926 * XXX: Make sure the client doesn't use pipelining
1927 * behind Privoxy's back.
1929 if (FD_ISSET(csp->cfd, &rfds))
1931 int max_bytes_to_read = sizeof(buf) - 1;
1933 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1934 if ((csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
1936 if (data_is_available(csp->cfd, 0))
1939 * If the next request is already waiting, we have
1940 * to stop select()ing the client socket. Otherwise
1941 * we would always return right away and get nothing
1944 watch_client_socket = 0;
1945 log_error(LOG_LEVEL_CONNECT,
1946 "Stopping to watch the client socket. "
1947 "There's already another request waiting.");
1951 * If the client socket is set, but there's no data
1952 * available on the socket, the client went fishing
1953 * and continuing talking to the server makes no sense.
1955 log_error(LOG_LEVEL_CONNECT,
1956 "The client closed socket %d while "
1957 "the server socket %d is still open.",
1958 csp->cfd, csp->server_connection.sfd);
1959 mark_server_socket_tainted(csp);
1962 if (csp->expected_client_content_length != 0)
1964 if (csp->expected_client_content_length < (sizeof(buf) - 1))
1966 max_bytes_to_read = (int)csp->expected_client_content_length;
1968 log_error(LOG_LEVEL_CONNECT,
1969 "Waiting for up to %d bytes from the client.",
1972 assert(max_bytes_to_read < sizeof(buf));
1973 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1975 len = read_socket(csp->cfd, buf, max_bytes_to_read);
1979 /* XXX: not sure if this is necessary. */
1980 mark_server_socket_tainted(csp);
1981 break; /* "game over, man" */
1984 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1985 if (csp->expected_client_content_length != 0)
1987 assert(len <= max_bytes_to_read);
1988 csp->expected_client_content_length -= (unsigned)len;
1989 log_error(LOG_LEVEL_CONNECT,
1990 "Expected client content length set to %llu "
1991 "after reading %d bytes.",
1992 csp->expected_client_content_length, len);
1993 if (csp->expected_client_content_length == 0)
1995 log_error(LOG_LEVEL_CONNECT,
1996 "Done reading from the client.");
1997 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
2000 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2002 if (write_socket(csp->server_connection.sfd, buf, (size_t)len))
2004 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2005 mark_server_socket_tainted(csp);
2012 * The server wants to talk. It could be the header or the body.
2013 * If `hdr' is null, then it's the header otherwise it's the body.
2014 * FIXME: Does `hdr' really mean `host'? No.
2016 if (FD_ISSET(csp->server_connection.sfd, &rfds))
2018 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2019 if (!socket_is_still_usable(csp->cfd))
2022 log_error(LOG_LEVEL_CONNECT,
2023 "The server still wants to talk, but the client may already have hung up on us.");
2025 log_error(LOG_LEVEL_CONNECT,
2026 "The server still wants to talk, but the client hung up on us.");
2027 mark_server_socket_tainted(csp);
2029 #endif /* def _WIN32 */
2031 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2034 len = read_socket(csp->server_connection.sfd, buf, sizeof(buf) - 1);
2038 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2040 if (http->ssl && (fwd->forward_host == NULL))
2043 * Just hang up. We already confirmed the client's CONNECT
2044 * request with status code 200 and unencrypted content is
2045 * no longer welcome.
2047 log_error(LOG_LEVEL_ERROR,
2048 "CONNECT already confirmed. Unable to tell the client about the problem.");
2051 else if (byte_count)
2054 * Just hang up. We already transmitted the original headers
2055 * and parts of the original content and therefore missed the
2056 * chance to send an error message (without risking data corruption).
2058 * XXX: we could retry with a fancy range request here.
2060 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2061 "Unable to tell the client about the problem.");
2062 mark_server_socket_tainted(csp);
2066 * XXX: Consider handling the cases above the same.
2068 mark_server_socket_tainted(csp);
2072 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2073 if (csp->flags & CSP_FLAG_CHUNKED)
2075 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2077 /* XXX: this is a temporary hack */
2078 log_error(LOG_LEVEL_CONNECT,
2079 "Looks like we reached the end of the last chunk. "
2080 "We better stop reading.");
2081 csp->expected_content_length = byte_count + (unsigned long long)len;
2082 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2086 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2089 * Add a trailing zero to let be able to use string operations.
2090 * XXX: do we still need this with filter_popups gone?
2095 * Normally, this would indicate that we've read
2096 * as much as the server has sent us and we can
2097 * close the client connection. However, Microsoft
2098 * in its wisdom has released IIS/5 with a bug that
2099 * prevents it from sending the trailing \r\n in
2100 * a 302 redirect header (and possibly other headers).
2101 * To work around this if we've haven't parsed
2102 * a full header we'll append a trailing \r\n
2103 * and see if this now generates a valid one.
2105 * This hack shouldn't have any impacts. If we've
2106 * already transmitted the header or if this is a
2107 * SSL connection, then we won't bother with this
2108 * hack. So we only work on partially received
2109 * headers. If we append a \r\n and this still
2110 * doesn't generate a valid header, then we won't
2111 * transmit anything to the client.
2116 if (server_body || http->ssl)
2119 * If we have been buffering up the document,
2120 * now is the time to apply content modification
2121 * and send the result to the client.
2125 p = execute_content_filter(csp, content_filter);
2127 * If the content filter fails, use the original
2128 * buffer and length.
2129 * (see p != NULL ? p : csp->iob->cur below)
2133 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2136 if (JB_ERR_OK != update_server_headers(csp))
2138 log_error(LOG_LEVEL_FATAL,
2139 "Failed to update server headers. after filtering.");
2142 hdr = list_to_text(csp->headers);
2145 /* FIXME Should handle error properly */
2146 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2149 if (write_socket(csp->cfd, hdr, strlen(hdr))
2150 || write_socket(csp->cfd,
2151 ((p != NULL) ? p : csp->iob->cur), (size_t)csp->content_length))
2153 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2156 mark_server_socket_tainted(csp);
2164 break; /* "game over, man" */
2168 * This is NOT the body, so
2169 * Let's pretend the server just sent us a blank line.
2171 snprintf(buf, sizeof(buf), "\r\n");
2172 len = (int)strlen(buf);
2175 * Now, let the normal header parsing algorithm below do its
2176 * job. If it fails, we'll exit instead of continuing.
2183 * If this is an SSL connection or we're in the body
2184 * of the server document, just write it to the client,
2185 * unless we need to buffer the body for later content-filtering
2187 if (server_body || http->ssl)
2192 * If there is no memory left for buffering the content, or the buffer limit
2193 * has been reached, switch to non-filtering mode, i.e. make & write the
2194 * header, flush the iob and buf, and get out of the way.
2196 if (add_to_iob(csp, buf, len))
2201 log_error(LOG_LEVEL_INFO,
2202 "Flushing header and buffers. Stepping back from filtering.");
2204 hdr = list_to_text(csp->headers);
2208 * Memory is too tight to even generate the header.
2209 * Send our static "Out-of-memory" page.
2211 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2212 rsp = cgi_error_memory();
2213 send_crunch_response(csp, rsp);
2214 mark_server_socket_tainted(csp);
2217 hdrlen = strlen(hdr);
2219 if (write_socket(csp->cfd, hdr, hdrlen)
2220 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2221 || (write_socket(csp->cfd, buf, (size_t)len)))
2223 log_error(LOG_LEVEL_CONNECT,
2224 "Flush header and buffers to client failed: %E");
2226 mark_server_socket_tainted(csp);
2231 * Reset the byte_count to the amount of bytes
2232 * we just flushed. len will be added a few lines below,
2233 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2235 byte_count = (unsigned long long)flushed;
2237 content_filter = NULL;
2243 if (write_socket(csp->cfd, buf, (size_t)len))
2245 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2246 mark_server_socket_tainted(csp);
2250 byte_count += (unsigned long long)len;
2256 * We're still looking for the end of the server's header.
2257 * Buffer up the data we just read. If that fails, there's
2258 * little we can do but send our static out-of-memory page.
2260 if (add_to_iob(csp, buf, len))
2262 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2263 rsp = cgi_error_memory();
2264 send_crunch_response(csp, rsp);
2265 mark_server_socket_tainted(csp);
2269 /* Convert iob into something sed() can digest */
2270 if (JB_ERR_PARSE == get_server_headers(csp))
2275 * Well, we tried our MS IIS/5 hack and it didn't work.
2276 * The header is incomplete and there isn't anything
2277 * we can do about it.
2279 log_error(LOG_LEVEL_ERROR, "Invalid server headers. "
2280 "Applying the MS IIS5 hack didn't help.");
2281 log_error(LOG_LEVEL_CLF,
2282 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2283 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2284 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2285 mark_server_socket_tainted(csp);
2291 * Since we have to wait for more from the server before
2292 * we can parse the headers we just continue here.
2294 log_error(LOG_LEVEL_CONNECT,
2295 "Continuing buffering headers. Bytes most recently read: %d.",
2303 * Account for the content bytes we
2304 * might have gotten with the headers.
2306 assert(csp->iob->eod >= csp->iob->cur);
2307 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
2310 /* Did we actually get anything? */
2311 if (NULL == csp->headers->first)
2313 if ((csp->flags & CSP_FLAG_REUSED_CLIENT_CONNECTION))
2315 log_error(LOG_LEVEL_ERROR,
2316 "Empty server or forwarder response received on socket %d. "
2317 "Closing client connection %d without sending data.",
2318 csp->server_connection.sfd, csp->cfd);
2322 log_error(LOG_LEVEL_ERROR,
2323 "Empty server or forwarder response received on socket %d.",
2324 csp->server_connection.sfd);
2325 send_crunch_response(csp, error_response(csp, "no-server-data"));
2327 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2328 free_http_request(http);
2329 mark_server_socket_tainted(csp);
2333 assert(csp->headers->first->str);
2335 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
2336 strncmpic(csp->headers->first->str, "ICY", 3))
2339 * It doesn't look like a HTTP (or Shoutcast) response:
2340 * tell the client and log the problem.
2342 if (strlen(csp->headers->first->str) > 30)
2344 csp->headers->first->str[30] = '\0';
2346 log_error(LOG_LEVEL_ERROR,
2347 "Invalid server or forwarder response. Starts with: %s",
2348 csp->headers->first->str);
2349 log_error(LOG_LEVEL_CLF,
2350 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2351 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2352 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2353 free_http_request(http);
2354 mark_server_socket_tainted(csp);
2359 * We have now received the entire server header,
2360 * filter it and send the result to the client
2362 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
2364 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2366 hdr = list_to_text(csp->headers);
2369 /* FIXME Should handle error properly */
2370 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2373 csp->server_connection.response_received = time(NULL);
2375 if (crunch_response_triggered(csp, crunchers_light))
2378 * One of the tags created by a server-header
2379 * tagger triggered a crunch. We already
2380 * delivered the crunch response to the client
2381 * and are done here after cleaning up.
2384 mark_server_socket_tainted(csp);
2387 /* Buffer and pcrs filter this if appropriate. */
2389 if (!http->ssl) /* We talk plaintext */
2391 content_filter = get_filter_function(csp);
2394 * Only write if we're not buffering for content modification
2396 if (!content_filter)
2399 * Write the server's (modified) header to
2400 * the client (along with anything else that
2401 * may be in the buffer)
2404 if (write_socket(csp->cfd, hdr, strlen(hdr))
2405 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
2407 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2410 * The write failed, so don't bother mentioning it
2411 * to the client... it probably can't hear us anyway.
2414 mark_server_socket_tainted(csp);
2419 /* we're finished with the server's header */
2425 * If this was a MS IIS/5 hack then it means the server
2426 * has already closed the connection. Nothing more to read.
2431 log_error(LOG_LEVEL_ERROR,
2432 "Closed server connection detected. "
2433 "Applying the MS IIS5 hack didn't help.");
2434 log_error(LOG_LEVEL_CLF,
2435 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2436 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2437 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2438 mark_server_socket_tainted(csp);
2444 mark_server_socket_tainted(csp);
2445 return; /* huh? we should never get here */
2448 if (csp->content_length == 0)
2451 * If Privoxy didn't recalculate the Content-Lenght,
2452 * byte_count is still correct.
2454 csp->content_length = byte_count;
2457 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2458 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2459 && (csp->expected_content_length != byte_count))
2461 log_error(LOG_LEVEL_CONNECT,
2462 "Received %llu bytes while expecting %llu.",
2463 byte_count, csp->expected_content_length);
2464 mark_server_socket_tainted(csp);
2468 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
2469 csp->ip_addr_str, http->ocmd, csp->content_length);
2471 csp->server_connection.timestamp = time(NULL);
2475 /*********************************************************************
2479 * Description : This is little more than chat. We only "serve" to
2480 * to close (or remember) any socket that chat may have
2484 * 1 : csp = Current client state (buffers, headers, etc...)
2488 *********************************************************************/
2490 void serve(struct client_state *csp)
2491 #else /* ifndef AMIGA */
2492 static void serve(struct client_state *csp)
2493 #endif /* def AMIGA */
2495 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2496 #ifdef FEATURE_CONNECTION_SHARING
2497 static int monitor_thread_running = 0;
2498 #endif /* def FEATURE_CONNECTION_SHARING */
2499 int continue_chatting = 0;
2503 unsigned int latency;
2507 latency = (unsigned)(csp->server_connection.response_received -
2508 csp->server_connection.request_sent) / 2;
2510 continue_chatting = (csp->config->feature_flags
2511 & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
2512 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
2513 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
2514 && (csp->cfd != JB_INVALID_SOCKET)
2515 && (csp->server_connection.sfd != JB_INVALID_SOCKET)
2516 && socket_is_still_usable(csp->server_connection.sfd)
2517 && (latency < csp->server_connection.keep_alive_timeout);
2519 if (continue_chatting)
2521 unsigned int client_timeout;
2523 if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
2525 log_error(LOG_LEVEL_CONNECT, "The server didn't specify how long "
2526 "the connection will stay open. Assume it's only a second.");
2527 csp->server_connection.keep_alive_timeout = 1;
2530 client_timeout = (unsigned)csp->server_connection.keep_alive_timeout - latency;
2532 log_error(LOG_LEVEL_CONNECT,
2533 "Waiting for the next client request. "
2534 "Keeping the server socket %d to %s open.",
2535 csp->server_connection.sfd, csp->server_connection.host);
2537 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
2538 && data_is_available(csp->cfd, (int)client_timeout)
2539 && socket_is_still_usable(csp->cfd))
2541 log_error(LOG_LEVEL_CONNECT, "Client request arrived in "
2542 "time or the client closed the connection.");
2544 * Get the csp in a mostly vergin state again.
2545 * XXX: Should be done elsewhere.
2547 csp->content_type = 0;
2548 csp->content_length = 0;
2549 csp->expected_content_length = 0;
2550 csp->expected_client_content_length = 0;
2551 list_remove_all(csp->headers);
2552 freez(csp->iob->buf);
2553 memset(csp->iob, 0, sizeof(csp->iob));
2554 freez(csp->error_message);
2555 free_http_request(csp->http);
2556 destroy_list(csp->headers);
2557 destroy_list(csp->tags);
2558 free_current_action(csp->action);
2559 if (NULL != csp->fwd)
2561 unload_forward_spec(csp->fwd);
2565 /* XXX: Store per-connection flags someplace else. */
2566 csp->flags = CSP_FLAG_ACTIVE |
2567 (csp->flags & CSP_FLAG_TOGGLED_ON) | CSP_FLAG_REUSED_CLIENT_CONNECTION;
2571 log_error(LOG_LEVEL_CONNECT,
2572 "No additional client request received in time.");
2573 #ifdef FEATURE_CONNECTION_SHARING
2574 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
2575 && (socket_is_still_usable(csp->server_connection.sfd)))
2577 time_t time_open = time(NULL) - csp->server_connection.timestamp;
2579 if (csp->server_connection.keep_alive_timeout < time_open + latency)
2584 remember_connection(&csp->server_connection);
2585 csp->server_connection.sfd = JB_INVALID_SOCKET;
2586 close_socket(csp->cfd);
2587 csp->cfd = JB_INVALID_SOCKET;
2588 privoxy_mutex_lock(&connection_reuse_mutex);
2589 if (!monitor_thread_running)
2591 monitor_thread_running = 1;
2592 privoxy_mutex_unlock(&connection_reuse_mutex);
2593 wait_for_alive_connections();
2594 privoxy_mutex_lock(&connection_reuse_mutex);
2595 monitor_thread_running = 0;
2597 privoxy_mutex_unlock(&connection_reuse_mutex);
2599 #endif /* def FEATURE_CONNECTION_SHARING */
2603 else if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2605 log_error(LOG_LEVEL_CONNECT,
2606 "The connection on server socket %d to %s isn't reusable. "
2607 "Closing.", csp->server_connection.sfd, csp->server_connection.host);
2609 } while (continue_chatting);
2611 mark_connection_closed(&csp->server_connection);
2614 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2616 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2618 #ifdef FEATURE_CONNECTION_SHARING
2619 forget_connection(csp->server_connection.sfd);
2620 #endif /* def FEATURE_CONNECTION_SHARING */
2621 close_socket(csp->server_connection.sfd);
2624 if (csp->cfd != JB_INVALID_SOCKET)
2626 close_socket(csp->cfd);
2629 csp->flags &= ~CSP_FLAG_ACTIVE;
2635 /*********************************************************************
2637 * Function : server_thread
2639 * Description : We only exist to call `serve' in a threaded environment.
2642 * 1 : data = Current client state (buffers, headers, etc...)
2644 * Returns : Always 0.
2646 *********************************************************************/
2647 static int32 server_thread(void *data)
2649 serve((struct client_state *) data);
2656 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2657 /*********************************************************************
2661 * Description : Print usage info & exit.
2663 * Parameters : Pointer to argv[0] for identifying ourselves
2667 *********************************************************************/
2668 static void usage(const char *myname)
2670 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2674 #endif /* defined(unix) */
2677 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
2678 #endif /* defined(unix) */
2679 "[--version] [configfile]\n"
2680 "Aborting\n", myname);
2685 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
2688 #ifdef MUTEX_LOCKS_AVAILABLE
2689 /*********************************************************************
2691 * Function : privoxy_mutex_lock
2693 * Description : Locks a mutex.
2696 * 1 : mutex = The mutex to lock.
2698 * Returns : Void. May exit in case of errors.
2700 *********************************************************************/
2701 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
2703 #ifdef FEATURE_PTHREAD
2704 int err = pthread_mutex_lock(mutex);
2707 if (mutex != &log_mutex)
2709 log_error(LOG_LEVEL_FATAL,
2710 "Mutex locking failed: %s.\n", strerror(err));
2715 EnterCriticalSection(mutex);
2716 #endif /* def FEATURE_PTHREAD */
2720 /*********************************************************************
2722 * Function : privoxy_mutex_unlock
2724 * Description : Unlocks a mutex.
2727 * 1 : mutex = The mutex to unlock.
2729 * Returns : Void. May exit in case of errors.
2731 *********************************************************************/
2732 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
2734 #ifdef FEATURE_PTHREAD
2735 int err = pthread_mutex_unlock(mutex);
2738 if (mutex != &log_mutex)
2740 log_error(LOG_LEVEL_FATAL,
2741 "Mutex unlocking failed: %s.\n", strerror(err));
2746 LeaveCriticalSection(mutex);
2747 #endif /* def FEATURE_PTHREAD */
2751 /*********************************************************************
2753 * Function : privoxy_mutex_init
2755 * Description : Prepares a mutex.
2758 * 1 : mutex = The mutex to initialize.
2760 * Returns : Void. May exit in case of errors.
2762 *********************************************************************/
2763 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
2765 #ifdef FEATURE_PTHREAD
2766 int err = pthread_mutex_init(mutex, 0);
2769 printf("Fatal error. Mutex initialization failed: %s.\n",
2774 InitializeCriticalSection(mutex);
2775 #endif /* def FEATURE_PTHREAD */
2777 #endif /* def MUTEX_LOCKS_AVAILABLE */
2779 /*********************************************************************
2781 * Function : initialize_mutexes
2783 * Description : Prepares mutexes if mutex support is available.
2787 * Returns : Void, exits in case of errors.
2789 *********************************************************************/
2790 static void initialize_mutexes(void)
2792 #ifdef MUTEX_LOCKS_AVAILABLE
2794 * Prepare global mutex semaphores
2796 privoxy_mutex_init(&log_mutex);
2797 privoxy_mutex_init(&log_init_mutex);
2798 privoxy_mutex_init(&connection_reuse_mutex);
2801 * XXX: The assumptions below are a bit naive
2802 * and can cause locks that aren't necessary.
2804 * For example older FreeBSD versions (< 6.x?)
2805 * have no gethostbyname_r, but gethostbyname is
2808 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
2809 privoxy_mutex_init(&resolver_mutex);
2810 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
2812 * XXX: should we use a single mutex for
2813 * localtime() and gmtime() as well?
2815 #ifndef HAVE_GMTIME_R
2816 privoxy_mutex_init(&gmtime_mutex);
2817 #endif /* ndef HAVE_GMTIME_R */
2819 #ifndef HAVE_LOCALTIME_R
2820 privoxy_mutex_init(&localtime_mutex);
2821 #endif /* ndef HAVE_GMTIME_R */
2824 privoxy_mutex_init(&rand_mutex);
2825 #endif /* ndef HAVE_RANDOM */
2826 #endif /* def MUTEX_LOCKS_AVAILABLE */
2830 /*********************************************************************
2834 * Description : Load the config file and start the listen loop.
2835 * This function is a lot more *sane* with the `load_config'
2836 * and `listen_loop' functions; although it stills does
2837 * a *little* too much for my taste.
2840 * 1 : argc = Number of parameters (including $0).
2841 * 2 : argv = Array of (char *)'s to the parameters.
2843 * Returns : 1 if : can't open config file, unrecognized directive,
2844 * stats requested in multi-thread mode, can't open the
2845 * log file, can't open the jar file, listen port is invalid,
2846 * any load fails, and can't bind port.
2848 * Else main never returns, the process must be signaled
2849 * to terminate execution. Or, on Windows, use the
2850 * "File", "Exit" menu option.
2852 *********************************************************************/
2854 int real_main(int argc, char **argv)
2856 int main(int argc, char **argv)
2860 unsigned int random_seed;
2862 struct passwd *pw = NULL;
2863 struct group *grp = NULL;
2866 char *pre_chroot_nslookup_to_load_resolver = NULL;
2873 #if !defined(_WIN32)
2880 /* Prepare mutexes if supported and necessary. */
2881 initialize_mutexes();
2883 /* Enable logging until further notice. */
2887 * Parse the command line arguments
2889 * XXX: simply printing usage information in case of
2890 * invalid arguments isn't particularly user friendly.
2892 while (++argc_pos < argc)
2895 /* Check to see if the service must be installed or uninstalled */
2896 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2898 const char *pName = argv[argc_pos] + 9;
2901 exit( (install_service(pName)) ? 0 : 1 );
2903 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2905 const char *pName = argv[argc_pos] + 11;
2908 exit((uninstall_service(pName)) ? 0 : 1);
2910 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2912 bRunAsService = TRUE;
2913 w32_set_service_cwd();
2914 atexit(w32_service_exit_notify);
2917 #endif /* defined(_WIN32) */
2920 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2922 if (strcmp(argv[argc_pos], "--help") == 0)
2927 else if(strcmp(argv[argc_pos], "--version") == 0)
2929 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2935 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2937 set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
2941 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2943 if (++argc_pos == argc) usage(argv[0]);
2944 pidfile = strdup(argv[argc_pos]);
2947 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2949 if (++argc_pos == argc) usage(argv[argc_pos]);
2951 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2954 if (NULL == (grp = getgrnam(p)))
2956 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2960 if (NULL == (pw = getpwnam(argv[argc_pos])))
2962 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2965 if (p != NULL) *--p = '\0';
2968 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
2970 if (++argc_pos == argc) usage(argv[0]);
2971 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
2974 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2978 #endif /* defined(unix) */
2980 else if (argc_pos + 1 != argc)
2983 * This is neither the last command line
2984 * option, nor was it recognized before,
2985 * therefore it must be invalid.
2991 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2993 configfile = argv[argc_pos];
2996 } /* -END- while (more arguments) */
2998 show_version(Argv[0]);
3001 if ( *configfile != '/' )
3003 char cwd[BUFFER_SIZE];
3005 size_t abs_file_size;
3007 /* make config-filename absolute here */
3008 if (NULL == getcwd(cwd, sizeof(cwd)))
3010 perror("failed to get current working directory");
3015 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3016 basedir = strdup(cwd);
3018 if (NULL == basedir ||
3019 NULL == (abs_file = malloc(abs_file_size)))
3021 perror("malloc failed");
3024 strlcpy(abs_file, basedir, abs_file_size);
3025 strlcat(abs_file, "/", abs_file_size );
3026 strlcat(abs_file, configfile, abs_file_size);
3027 configfile = abs_file;
3029 #endif /* defined unix */
3033 clients->next = NULL;
3035 /* XXX: factor out initialising after the next stable release. */
3038 #elif defined(_WIN32)
3042 random_seed = (unsigned int)time(NULL);
3044 srandom(random_seed);
3047 #endif /* ifdef HAVE_RANDOM */
3050 * Unix signal handling
3052 * Catch the abort, interrupt and terminate signals for a graceful exit
3053 * Catch the hangup signal so the errlog can be reopened.
3054 * Ignore the broken pipe signals (FIXME: Why?)
3056 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3059 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3060 const int ignored_signals[] = { SIGPIPE, 0 };
3062 for (idx = 0; catched_signals[idx] != 0; idx++)
3064 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3065 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3067 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3068 #endif /* ifdef sun */
3070 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3074 for (idx = 0; ignored_signals[idx] != 0; idx++)
3076 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3078 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3083 #else /* ifdef _WIN32 */
3084 # ifdef _WIN_CONSOLE
3086 * We *are* in a windows console app.
3087 * Print a verbose messages about FAQ's and such
3089 printf("%s", win32_blurb);
3090 # endif /* def _WIN_CONSOLE */
3091 #endif /* def _WIN32 */
3094 /* Initialize the CGI subsystem */
3095 cgi_init_error_messages();
3098 * If runnig on unix and without the --nodaemon
3099 * option, become a daemon. I.e. fork, detach
3100 * from tty and get process group leadership
3113 if ( pid < 0 ) /* error */
3118 else if ( pid != 0 ) /* parent */
3123 * must check for errors
3124 * child died due to missing files aso
3127 wpid = waitpid( pid, &status, WNOHANG );
3136 /* Should be more portable, but not as well tested */
3141 #else /* ndef __FreeBSD__ */
3143 #endif /* ndef __FreeBSD__ */
3144 fd = open("/dev/tty", O_RDONLY);
3147 /* no error check here */
3148 ioctl( fd, TIOCNOTTY,0 );
3153 * stderr (fd 2) will be closed later on,
3154 * when the config file has been parsed.
3161 } /* -END- if (!no_daemon) */
3164 * As soon as we have written the PID file, we can switch
3165 * to the user and group ID indicated by the --user option
3171 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3173 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3177 if (setgroups(1, &grp->gr_gid))
3179 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
3182 else if (initgroups(pw->pw_name, pw->pw_gid))
3184 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
3190 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3192 /* Read the time zone file from /etc before doing chroot. */
3194 if (NULL != pre_chroot_nslookup_to_load_resolver
3195 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3197 /* Initialize resolver library. */
3198 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3200 if (chroot(pw->pw_dir) < 0)
3202 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3206 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3209 if (setuid(pw->pw_uid))
3211 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3215 char putenv_dummy[64];
3217 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3218 if (putenv(putenv_dummy) != 0)
3220 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3223 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3224 if (putenv(putenv_dummy) != 0)
3226 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3232 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3235 #endif /* defined unix */
3238 /* This will be FALSE unless the command line specified --service
3242 /* Yup, so now we must attempt to establish a connection
3243 * with the service dispatcher. This will only work if this
3244 * process was launched by the service control manager to
3245 * actually run as a service. If this isn't the case, i've
3246 * known it take around 30 seconds or so for the call to return.
3249 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3250 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3252 /* Service has run, and at this point is now being stopped, so just return */
3257 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3259 /* An error occurred. Usually it's because --service was wrongly specified
3260 * and we were unable to connect to the Service Control Dispatcher because
3261 * it wasn't expecting us and is therefore not listening.
3263 * For now, just continue below to call the listen_loop function.
3266 #endif /* def _WIN32 */
3276 /*********************************************************************
3278 * Function : bind_port_helper
3280 * Description : Bind the listen port. Handles logging, and aborts
3284 * 1 : config = Privoxy configuration. Specifies port
3287 * Returns : Port that was opened.
3289 *********************************************************************/
3290 static jb_socket bind_port_helper(struct configuration_spec * config)
3295 if (config->haddr == NULL)
3297 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3302 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3303 config->hport, config->haddr);
3306 result = bind_port(config->haddr, config->hport, &bfd);
3313 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3314 "There may be another Privoxy or some other "
3315 "proxy running on port %d",
3316 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3317 config->hport, config->hport);
3320 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3321 "The hostname is not resolvable",
3322 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3325 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: %E",
3326 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3329 /* shouldn't get here */
3330 return JB_INVALID_SOCKET;
3333 config->need_bind = 0;
3340 /* Without this simple workaround we get this compiler warning from _beginthread
3341 * warning C4028: formal parameter 1 different from declaration
3343 void w32_service_listen_loop(void *p)
3347 #endif /* def _WIN32 */
3350 /*********************************************************************
3352 * Function : listen_loop
3354 * Description : bind the listen port and enter a "FOREVER" listening loop.
3360 *********************************************************************/
3361 static void listen_loop(void)
3363 struct client_state *csp = NULL;
3365 struct configuration_spec *config;
3366 unsigned int active_threads = 0;
3368 config = load_config();
3370 #ifdef FEATURE_CONNECTION_SHARING
3372 * XXX: Should be relocated once it no
3373 * longer needs to emit log messages.
3375 initialize_reusable_connections();
3376 #endif /* def FEATURE_CONNECTION_SHARING */
3378 bfd = bind_port_helper(config);
3380 #ifdef FEATURE_GRACEFUL_TERMINATION
3381 while (!g_terminate)
3386 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3387 while (waitpid(-1, NULL, WNOHANG) > 0)
3389 /* zombie children */
3391 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3394 * Free data that was used by died threads
3396 active_threads = sweep();
3400 * Re-open the errlog after HUP signal
3402 if (received_hup_signal)
3404 if (NULL != config->logfile)
3406 init_error_log(Argv[0], config->logfile);
3408 received_hup_signal = 0;
3412 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3414 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3418 csp->flags |= CSP_FLAG_ACTIVE;
3419 csp->server_connection.sfd = JB_INVALID_SOCKET;
3421 csp->config = config = load_config();
3423 if ( config->need_bind )
3426 * Since we were listening to the "old port", we will not see
3427 * a "listen" param change until the next request. So, at
3428 * least 1 more request must be made for us to find the new
3429 * setting. I am simply closing the old socket and binding the
3432 * Which-ever is correct, we will serve 1 more page via the
3433 * old settings. This should probably be a "show-proxy-args"
3434 * request. This should not be a so common of an operation
3435 * that this will hurt people's feelings.
3440 bfd = bind_port_helper(config);
3443 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3445 if (!accept_connection(csp, bfd))
3447 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3460 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3463 #ifdef FEATURE_TOGGLE
3464 if (global_toggle_state)
3465 #endif /* def FEATURE_TOGGLE */
3467 csp->flags |= CSP_FLAG_TOGGLED_ON;
3470 if (run_loader(csp))
3472 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3473 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3477 if (block_acl(NULL,csp))
3479 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
3480 close_socket(csp->cfd);
3481 freez(csp->ip_addr_str);
3485 #endif /* def FEATURE_ACL */
3487 if ((0 != config->max_client_connections)
3488 && (active_threads >= config->max_client_connections))
3490 log_error(LOG_LEVEL_CONNECT,
3491 "Rejecting connection from %s. Maximum number of connections reached.",
3493 write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
3494 strlen(TOO_MANY_CONNECTIONS_RESPONSE));
3495 close_socket(csp->cfd);
3496 freez(csp->ip_addr_str);
3501 /* add it to the list of clients */
3502 csp->next = clients->next;
3503 clients->next = csp;
3505 if (config->multi_threaded)
3509 /* this is a switch () statment in the C preprocessor - ugh */
3510 #undef SELECTED_ONE_OPTION
3512 /* Use Pthreads in preference to native code */
3513 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3514 #define SELECTED_ONE_OPTION
3516 pthread_t the_thread;
3517 pthread_attr_t attrs;
3519 pthread_attr_init(&attrs);
3520 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3521 errno = pthread_create(&the_thread, &attrs,
3522 (void * (*)(void *))serve, csp);
3523 child_id = errno ? -1 : 0;
3524 pthread_attr_destroy(&attrs);
3528 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3529 #define SELECTED_ONE_OPTION
3530 child_id = _beginthread(
3531 (void (*)(void *))serve,
3536 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3537 #define SELECTED_ONE_OPTION
3538 child_id = _beginthread(
3539 (void(* _Optlink)(void*))serve,
3545 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3546 #define SELECTED_ONE_OPTION
3548 thread_id tid = spawn_thread
3549 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3551 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3553 child_id = (int) tid;
3562 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3563 #define SELECTED_ONE_OPTION
3564 csp->cfd = ReleaseSocket(csp->cfd, -1);
3567 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3568 NP_Output, Output(),
3569 NP_CloseOutput, FALSE,
3570 NP_Name, (ULONG)"privoxy child",
3574 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3575 NP_Output, Output(),
3576 NP_CloseOutput, FALSE,
3577 NP_Name, (ULONG)"privoxy child",
3578 NP_StackSize, 200*1024,
3584 ((struct Task *)child_id)->tc_UserData = csp;
3585 Signal((struct Task *)child_id, SIGF_SINGLE);
3590 #if !defined(SELECTED_ONE_OPTION)
3593 /* This block is only needed when using fork().
3594 * When using threads, the server thread was
3595 * created and run by the call to _beginthread().
3597 if (child_id == 0) /* child */
3600 #ifdef FEATURE_TOGGLE
3601 int inherited_toggle_state = global_toggle_state;
3602 #endif /* def FEATURE_TOGGLE */
3607 * If we've been toggled or we've blocked the request, tell Mom
3610 #ifdef FEATURE_TOGGLE
3611 if (inherited_toggle_state != global_toggle_state)
3613 rc |= RC_FLAG_TOGGLED;
3615 #endif /* def FEATURE_TOGGLE */
3617 #ifdef FEATURE_STATISTICS
3618 if (csp->flags & CSP_FLAG_REJECTED)
3620 rc |= RC_FLAG_BLOCKED;
3622 #endif /* ndef FEATURE_STATISTICS */
3626 else if (child_id > 0) /* parent */
3628 /* in a fork()'d environment, the parent's
3629 * copy of the client socket and the CSP
3633 #if !defined(_WIN32) && !defined(__CYGWIN__)
3635 wait( &child_status );
3638 * Evaluate child's return code: If the child has
3639 * - been toggled, toggle ourselves
3640 * - blocked its request, bump up the stats counter
3643 #ifdef FEATURE_TOGGLE
3644 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
3646 global_toggle_state = !global_toggle_state;
3648 #endif /* def FEATURE_TOGGLE */
3650 #ifdef FEATURE_STATISTICS
3652 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
3656 #endif /* def FEATURE_STATISTICS */
3658 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
3659 close_socket(csp->cfd);
3660 csp->flags &= ~CSP_FLAG_ACTIVE;
3664 #undef SELECTED_ONE_OPTION
3665 /* end of cpp switch () */
3670 * Spawning the child failed, assume it's because
3671 * there are too many children running already.
3672 * XXX: If you assume ...
3674 log_error(LOG_LEVEL_ERROR,
3675 "Unable to take any additional connections: %E");
3676 write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
3677 strlen(TOO_MANY_CONNECTIONS_RESPONSE));
3678 close_socket(csp->cfd);
3679 csp->flags &= ~CSP_FLAG_ACTIVE;
3688 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
3690 /* Clean up. Aim: free all memory (no leaks) */
3691 #ifdef FEATURE_GRACEFUL_TERMINATION
3693 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
3695 unload_current_config_file();
3696 unload_current_actions_file();
3697 unload_current_re_filterfile();
3698 #ifdef FEATURE_TRUST
3699 unload_current_trust_file();
3702 if (config->multi_threaded)
3709 } while ((clients->next != NULL) && (--i > 0));
3713 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
3724 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
3725 /* Cleanup - remove taskbar icon etc. */
3730 #endif /* FEATURE_GRACEFUL_TERMINATION */