1 const char jcc_rcs[] = "$Id: jcc.c,v 1.299 2009/10/04 15:45:11 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_CONNECT,
1269 "Stopped waiting for the request line. Timeout: %d.",
1270 csp->config->socket_timeout);
1271 write_socket(csp->cfd, CLIENT_CONNECTION_TIMEOUT_RESPONSE,
1272 strlen(CLIENT_CONNECTION_TIMEOUT_RESPONSE));
1276 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1278 if (len <= 0) return NULL;
1281 * If there is no memory left for buffering the
1282 * request, there is nothing we can do but hang up
1284 if (add_to_iob(csp, buf, len))
1289 request_line = get_header(csp->iob);
1291 } while ((NULL != request_line) && ('\0' == *request_line));
1293 return request_line;
1298 /*********************************************************************
1300 * Function : receive_client_request
1302 * Description : Read the client's request (more precisely the
1303 * client headers) and answer it if necessary.
1305 * Note that since we're not using select() we could get
1306 * blocked here if a client connected, then didn't say
1310 * 1 : csp = Current client state (buffers, headers, etc...)
1312 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
1314 *********************************************************************/
1315 static jb_err receive_client_request(struct client_state *csp)
1317 char buf[BUFFER_SIZE];
1320 struct http_request *http;
1324 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1325 struct list header_list;
1326 struct list *headers = &header_list;
1330 memset(buf, 0, sizeof(buf));
1332 req = get_request_line(csp);
1335 mark_server_socket_tainted(csp);
1336 return JB_ERR_PARSE;
1338 assert(*req != '\0');
1340 if (client_protocol_is_unsupported(csp, req))
1342 return JB_ERR_PARSE;
1345 #ifdef FEATURE_FORCE_LOAD
1347 * If this request contains the FORCE_PREFIX and blocks
1348 * aren't enforced, get rid of it and set the force flag.
1350 if (strstr(req, FORCE_PREFIX))
1352 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
1354 log_error(LOG_LEVEL_FORCE,
1355 "Ignored force prefix in request: \"%s\".", req);
1359 strclean(req, FORCE_PREFIX);
1360 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
1361 csp->flags |= CSP_FLAG_FORCED;
1364 #endif /* def FEATURE_FORCE_LOAD */
1366 err = parse_http_request(req, http);
1368 if (JB_ERR_OK != err)
1370 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1371 /* XXX: Use correct size */
1372 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1373 log_error(LOG_LEVEL_ERROR,
1374 "Couldn't parse request line received from %s: %s",
1375 csp->ip_addr_str, jb_err_to_string(err));
1377 free_http_request(http);
1378 return JB_ERR_PARSE;
1381 /* grab the rest of the client's headers */
1385 p = get_header(csp->iob);
1389 /* There are no additional headers to read. */
1396 * We didn't receive a complete header
1397 * line yet, get the rest of it.
1399 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
1401 log_error(LOG_LEVEL_ERROR,
1402 "Stopped grabbing the client headers.");
1403 destroy_list(headers);
1404 return JB_ERR_PARSE;
1407 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1410 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1411 destroy_list(headers);
1412 return JB_ERR_PARSE;
1415 if (add_to_iob(csp, buf, len))
1418 * If there is no memory left for buffering the
1419 * request, there is nothing we can do but hang up
1421 destroy_list(headers);
1422 return JB_ERR_MEMORY;
1428 * We were able to read a complete
1429 * header and can finaly enlist it.
1436 if (http->host == NULL)
1439 * If we still don't know the request destination,
1440 * the request is invalid or the client uses
1441 * Privoxy without its knowledge.
1443 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1446 * Our attempts to get the request destination
1447 * elsewhere failed or Privoxy is configured
1448 * to only accept proxy requests.
1450 * An error response has already been send
1451 * and we're done here.
1453 return JB_ERR_PARSE;
1458 * Determine the actions for this URL
1460 #ifdef FEATURE_TOGGLE
1461 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1463 /* Most compatible set of actions (i.e. none) */
1464 init_current_action(csp->action);
1467 #endif /* ndef FEATURE_TOGGLE */
1469 get_url_actions(csp, http);
1473 * Save a copy of the original request for logging
1475 http->ocmd = strdup(http->cmd);
1476 if (http->ocmd == NULL)
1478 log_error(LOG_LEVEL_FATAL,
1479 "Out of memory copying HTTP request line");
1481 enlist(csp->headers, http->cmd);
1483 /* Append the previously read headers */
1484 list_append_list_unique(csp->headers, headers);
1485 destroy_list(headers);
1492 /*********************************************************************
1494 * Function : parse_client_request
1496 * Description : Parses the client's request and decides what to do
1499 * Note that since we're not using select() we could get
1500 * blocked here if a client connected, then didn't say
1504 * 1 : csp = Current client state (buffers, headers, etc...)
1506 * Returns : JB_ERR_OK or JB_ERR_PARSE
1508 *********************************************************************/
1509 static jb_err parse_client_request(struct client_state *csp)
1511 struct http_request *http = csp->http;
1514 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1515 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
1516 && (!strcmpic(csp->http->ver, "HTTP/1.1"))
1517 && (csp->http->ssl == 0))
1519 /* Assume persistence until further notice */
1520 csp->flags |= CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE;
1522 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1524 err = sed(csp, FILTER_CLIENT_HEADERS);
1525 if (JB_ERR_OK != err)
1527 /* XXX: Should be handled in sed(). */
1528 assert(err == JB_ERR_PARSE);
1529 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
1531 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
1533 /* Check request line for rewrites. */
1534 if ((NULL == csp->headers->first->str)
1535 || (strcmp(http->cmd, csp->headers->first->str) &&
1536 (JB_ERR_OK != change_request_destination(csp))))
1539 * A header filter broke the request line - bail out.
1541 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
1542 /* XXX: Use correct size */
1543 log_error(LOG_LEVEL_CLF,
1544 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
1545 log_error(LOG_LEVEL_ERROR,
1546 "Invalid request line after applying header filters.");
1547 free_http_request(http);
1549 return JB_ERR_PARSE;
1552 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1553 if (csp->http->ssl == 0)
1555 verify_request_length(csp);
1557 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1564 /*********************************************************************
1568 * Description : Once a connection to the client has been accepted,
1569 * this function is called (via serve()) to handle the
1570 * main business of the communication. When this
1571 * function returns, the caller must close the client
1574 * FIXME: chat is nearly thousand lines long.
1578 * 1 : csp = Current client state (buffers, headers, etc...)
1580 * Returns : Nothing.
1582 *********************************************************************/
1583 static void chat(struct client_state *csp)
1585 char buf[BUFFER_SIZE];
1592 int ms_iis5_hack = 0;
1593 unsigned long long byte_count = 0;
1594 int forwarded_connect_retries = 0;
1595 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1596 const struct forward_spec *fwd;
1597 struct http_request *http;
1598 long len = 0; /* for buffer sizes (and negative error codes) */
1600 /* Function that does the content filtering for the current request */
1601 filter_function_ptr content_filter = NULL;
1603 /* Skeleton for HTTP response, if we should intercept the request */
1604 struct http_response *rsp;
1605 struct timeval timeout;
1606 int watch_client_socket = 1;
1608 memset(buf, 0, sizeof(buf));
1612 if (receive_client_request(csp) != JB_ERR_OK)
1616 if (parse_client_request(csp) != JB_ERR_OK)
1621 /* decide how to route the HTTP request */
1622 fwd = forward_url(csp, http);
1625 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1626 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1631 * build the http request to send to the server
1632 * we have to do one of the following:
1634 * create = use the original HTTP request to create a new
1635 * HTTP request that has either the path component
1636 * without the http://domainspec (w/path) or the
1637 * full orininal URL (w/url)
1638 * Note that the path and/or the HTTP version may
1639 * have been altered by now.
1641 * connect = Open a socket to the host:port of the server
1642 * and short-circuit server and client socket.
1644 * pass = Pass the request unchanged if forwarding a CONNECT
1645 * request to a parent proxy. Note that we'll be sending
1646 * the CFAIL message ourselves if connecting to the parent
1647 * fails, but we won't send a CSUCCEED message if it works,
1648 * since that would result in a double message (ours and the
1649 * parent's). After sending the request to the parent, we simply
1652 * here's the matrix:
1655 * +--------+--------+
1657 * 0 | create | connect|
1659 * Forwarding +--------+--------+
1661 * 1 | create | pass |
1663 * +--------+--------+
1667 if (http->ssl && connect_port_is_forbidden(csp))
1669 const char *acceptable_connect_ports =
1670 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
1671 assert(NULL != acceptable_connect_ports);
1672 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
1673 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
1674 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
1675 csp->action->flags |= ACTION_BLOCK;
1681 freez(csp->headers->first->str);
1682 build_request_line(csp, fwd, &csp->headers->first->str);
1686 * We have a request. Check if one of the crunchers wants it.
1688 if (crunch_response_triggered(csp, crunchers_all))
1691 * Yes. The client got the crunch response
1692 * and we are done here after cleaning up.
1694 /* XXX: why list_remove_all()? */
1695 list_remove_all(csp->headers);
1700 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1702 if (fwd->forward_host)
1704 log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s",
1705 fwd->forward_host, fwd->forward_port, http->hostport);
1709 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1712 /* here we connect to the server, gateway, or the forwarder */
1714 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1715 if ((csp->server_connection.sfd != JB_INVALID_SOCKET)
1716 && socket_is_still_usable(csp->server_connection.sfd)
1717 && connection_destination_matches(&csp->server_connection, http, fwd))
1719 log_error(LOG_LEVEL_CONNECT,
1720 "Reusing server socket %u. Opened for %s.",
1721 csp->server_connection.sfd, csp->server_connection.host);
1725 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
1727 log_error(LOG_LEVEL_CONNECT,
1728 "Closing server socket %u. Opened for %s.",
1729 csp->server_connection.sfd, csp->server_connection.host);
1730 close_socket(csp->server_connection.sfd);
1731 mark_connection_closed(&csp->server_connection);
1733 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1735 while ((csp->server_connection.sfd = forwarded_connect(fwd, http, csp))
1736 && (errno == EINVAL)
1737 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1739 log_error(LOG_LEVEL_ERROR,
1740 "failed request #%u to connect to %s. Trying again.",
1741 forwarded_connect_retries, http->hostport);
1744 if (csp->server_connection.sfd == JB_INVALID_SOCKET)
1746 if (fwd->type != SOCKS_NONE)
1749 rsp = error_response(csp, "forwarding-failed");
1751 else if (errno == EINVAL)
1753 rsp = error_response(csp, "no-such-domain");
1757 rsp = error_response(csp, "connect-failed");
1758 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1762 /* Write the answer to the client */
1765 send_crunch_response(csp, rsp);
1770 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1771 save_connection_destination(csp->server_connection.sfd,
1772 http, fwd, &csp->server_connection);
1773 csp->server_connection.keep_alive_timeout =
1774 (unsigned)csp->config->keep_alive_timeout;
1776 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1778 hdr = list_to_text(csp->headers);
1781 /* FIXME Should handle error properly */
1782 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1784 list_remove_all(csp->headers);
1786 if (fwd->forward_host || (http->ssl == 0))
1789 * Write the client's (modified) header to the server
1790 * (along with anything else that may be in the buffer)
1792 if (write_socket(csp->server_connection.sfd, hdr, strlen(hdr))
1793 || (flush_socket(csp->server_connection.sfd, csp->iob) < 0))
1795 log_error(LOG_LEVEL_CONNECT,
1796 "write header to: %s failed: %E", http->hostport);
1798 rsp = error_response(csp, "connect-failed");
1801 send_crunch_response(csp, rsp);
1811 * We're running an SSL tunnel and we're not forwarding,
1812 * so just send the "connect succeeded" message to the
1813 * client, flush the rest, and get out of the way.
1815 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
1823 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
1825 csp->server_connection.request_sent = time(NULL);
1827 /* we're finished with the client's header */
1830 maxfd = (csp->cfd > csp->server_connection.sfd) ?
1831 csp->cfd : csp->server_connection.sfd;
1833 /* pass data between the client and server
1834 * until one or the other shuts down the connection.
1843 * FD_ZERO here seems to point to an errant macro which crashes.
1844 * So do this by hand for now...
1846 memset(&rfds,0x00,sizeof(fd_set));
1850 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1851 if (!watch_client_socket)
1853 maxfd = csp->server_connection.sfd;
1856 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1858 FD_SET(csp->cfd, &rfds);
1861 FD_SET(csp->server_connection.sfd, &rfds);
1863 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1864 if ((csp->flags & CSP_FLAG_CHUNKED)
1865 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
1866 && ((csp->iob->eod - csp->iob->cur) >= 5)
1867 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
1869 log_error(LOG_LEVEL_CONNECT,
1870 "Looks like we read the last chunk together with "
1871 "the server headers. We better stop reading.");
1872 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
1873 csp->expected_content_length = byte_count;
1874 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
1876 if (server_body && server_response_is_complete(csp, byte_count))
1878 if (csp->expected_content_length == byte_count)
1880 log_error(LOG_LEVEL_CONNECT,
1881 "Done reading from server. Content length: %llu as expected. "
1882 "Bytes most recently read: %d.",
1887 log_error(LOG_LEVEL_CONNECT,
1888 "Done reading from server. Expected content length: %llu. "
1889 "Actual content length: %llu. Bytes most recently read: %d.",
1890 csp->expected_content_length, byte_count, len);
1894 * XXX: should not jump around,
1895 * chat() is complicated enough already.
1899 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
1901 timeout.tv_sec = csp->config->socket_timeout;
1902 timeout.tv_usec = 0;
1903 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
1907 log_error(LOG_LEVEL_ERROR,
1908 "Didn't receive data in time: %s", http->url);
1909 if ((byte_count == 0) && (http->ssl == 0))
1911 send_crunch_response(csp, error_response(csp, "connection-timeout"));
1913 mark_server_socket_tainted(csp);
1918 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1919 mark_server_socket_tainted(csp);
1924 * This is the body of the browser's request,
1925 * just read and write it.
1927 * XXX: Make sure the client doesn't use pipelining
1928 * behind Privoxy's back.
1930 if (FD_ISSET(csp->cfd, &rfds))
1932 int max_bytes_to_read = sizeof(buf) - 1;
1934 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1935 if ((csp->flags & CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ))
1937 if (data_is_available(csp->cfd, 0))
1940 * If the next request is already waiting, we have
1941 * to stop select()ing the client socket. Otherwise
1942 * we would always return right away and get nothing
1945 watch_client_socket = 0;
1946 log_error(LOG_LEVEL_CONNECT,
1947 "Stopping to watch the client socket. "
1948 "There's already another request waiting.");
1952 * If the client socket is set, but there's no data
1953 * available on the socket, the client went fishing
1954 * and continuing talking to the server makes no sense.
1956 log_error(LOG_LEVEL_CONNECT,
1957 "The client closed socket %d while "
1958 "the server socket %d is still open.",
1959 csp->cfd, csp->server_connection.sfd);
1960 mark_server_socket_tainted(csp);
1963 if (csp->expected_client_content_length != 0)
1965 if (csp->expected_client_content_length < (sizeof(buf) - 1))
1967 max_bytes_to_read = (int)csp->expected_client_content_length;
1969 log_error(LOG_LEVEL_CONNECT,
1970 "Waiting for up to %d bytes from the client.",
1973 assert(max_bytes_to_read < sizeof(buf));
1974 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
1976 len = read_socket(csp->cfd, buf, max_bytes_to_read);
1980 /* XXX: not sure if this is necessary. */
1981 mark_server_socket_tainted(csp);
1982 break; /* "game over, man" */
1985 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1986 if (csp->expected_client_content_length != 0)
1988 assert(len <= max_bytes_to_read);
1989 csp->expected_client_content_length -= (unsigned)len;
1990 log_error(LOG_LEVEL_CONNECT,
1991 "Expected client content length set to %llu "
1992 "after reading %d bytes.",
1993 csp->expected_client_content_length, len);
1994 if (csp->expected_client_content_length == 0)
1996 log_error(LOG_LEVEL_CONNECT,
1997 "Done reading from the client.");
1998 csp->flags |= CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ;
2001 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2003 if (write_socket(csp->server_connection.sfd, buf, (size_t)len))
2005 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2006 mark_server_socket_tainted(csp);
2013 * The server wants to talk. It could be the header or the body.
2014 * If `hdr' is null, then it's the header otherwise it's the body.
2015 * FIXME: Does `hdr' really mean `host'? No.
2017 if (FD_ISSET(csp->server_connection.sfd, &rfds))
2019 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2020 if (!socket_is_still_usable(csp->cfd))
2023 log_error(LOG_LEVEL_CONNECT,
2024 "The server still wants to talk, but the client may already have hung up on us.");
2026 log_error(LOG_LEVEL_CONNECT,
2027 "The server still wants to talk, but the client hung up on us.");
2028 mark_server_socket_tainted(csp);
2030 #endif /* def _WIN32 */
2032 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2035 len = read_socket(csp->server_connection.sfd, buf, sizeof(buf) - 1);
2039 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2041 if (http->ssl && (fwd->forward_host == NULL))
2044 * Just hang up. We already confirmed the client's CONNECT
2045 * request with status code 200 and unencrypted content is
2046 * no longer welcome.
2048 log_error(LOG_LEVEL_ERROR,
2049 "CONNECT already confirmed. Unable to tell the client about the problem.");
2052 else if (byte_count)
2055 * Just hang up. We already transmitted the original headers
2056 * and parts of the original content and therefore missed the
2057 * chance to send an error message (without risking data corruption).
2059 * XXX: we could retry with a fancy range request here.
2061 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2062 "Unable to tell the client about the problem.");
2063 mark_server_socket_tainted(csp);
2067 * XXX: Consider handling the cases above the same.
2069 mark_server_socket_tainted(csp);
2073 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2074 if (csp->flags & CSP_FLAG_CHUNKED)
2076 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2078 /* XXX: this is a temporary hack */
2079 log_error(LOG_LEVEL_CONNECT,
2080 "Looks like we reached the end of the last chunk. "
2081 "We better stop reading.");
2082 csp->expected_content_length = byte_count + (unsigned long long)len;
2083 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2087 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2090 * Add a trailing zero to let be able to use string operations.
2091 * XXX: do we still need this with filter_popups gone?
2096 * Normally, this would indicate that we've read
2097 * as much as the server has sent us and we can
2098 * close the client connection. However, Microsoft
2099 * in its wisdom has released IIS/5 with a bug that
2100 * prevents it from sending the trailing \r\n in
2101 * a 302 redirect header (and possibly other headers).
2102 * To work around this if we've haven't parsed
2103 * a full header we'll append a trailing \r\n
2104 * and see if this now generates a valid one.
2106 * This hack shouldn't have any impacts. If we've
2107 * already transmitted the header or if this is a
2108 * SSL connection, then we won't bother with this
2109 * hack. So we only work on partially received
2110 * headers. If we append a \r\n and this still
2111 * doesn't generate a valid header, then we won't
2112 * transmit anything to the client.
2117 if (server_body || http->ssl)
2120 * If we have been buffering up the document,
2121 * now is the time to apply content modification
2122 * and send the result to the client.
2126 p = execute_content_filter(csp, content_filter);
2128 * If the content filter fails, use the original
2129 * buffer and length.
2130 * (see p != NULL ? p : csp->iob->cur below)
2134 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2137 if (JB_ERR_OK != update_server_headers(csp))
2139 log_error(LOG_LEVEL_FATAL,
2140 "Failed to update server headers. after filtering.");
2143 hdr = list_to_text(csp->headers);
2146 /* FIXME Should handle error properly */
2147 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2150 if (write_socket(csp->cfd, hdr, strlen(hdr))
2151 || write_socket(csp->cfd,
2152 ((p != NULL) ? p : csp->iob->cur), (size_t)csp->content_length))
2154 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2157 mark_server_socket_tainted(csp);
2165 break; /* "game over, man" */
2169 * This is NOT the body, so
2170 * Let's pretend the server just sent us a blank line.
2172 snprintf(buf, sizeof(buf), "\r\n");
2173 len = (int)strlen(buf);
2176 * Now, let the normal header parsing algorithm below do its
2177 * job. If it fails, we'll exit instead of continuing.
2184 * If this is an SSL connection or we're in the body
2185 * of the server document, just write it to the client,
2186 * unless we need to buffer the body for later content-filtering
2188 if (server_body || http->ssl)
2193 * If there is no memory left for buffering the content, or the buffer limit
2194 * has been reached, switch to non-filtering mode, i.e. make & write the
2195 * header, flush the iob and buf, and get out of the way.
2197 if (add_to_iob(csp, buf, len))
2202 log_error(LOG_LEVEL_INFO,
2203 "Flushing header and buffers. Stepping back from filtering.");
2205 hdr = list_to_text(csp->headers);
2209 * Memory is too tight to even generate the header.
2210 * Send our static "Out-of-memory" page.
2212 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2213 rsp = cgi_error_memory();
2214 send_crunch_response(csp, rsp);
2215 mark_server_socket_tainted(csp);
2218 hdrlen = strlen(hdr);
2220 if (write_socket(csp->cfd, hdr, hdrlen)
2221 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2222 || (write_socket(csp->cfd, buf, (size_t)len)))
2224 log_error(LOG_LEVEL_CONNECT,
2225 "Flush header and buffers to client failed: %E");
2227 mark_server_socket_tainted(csp);
2232 * Reset the byte_count to the amount of bytes
2233 * we just flushed. len will be added a few lines below,
2234 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2236 byte_count = (unsigned long long)flushed;
2238 content_filter = NULL;
2244 if (write_socket(csp->cfd, buf, (size_t)len))
2246 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2247 mark_server_socket_tainted(csp);
2251 byte_count += (unsigned long long)len;
2257 * We're still looking for the end of the server's header.
2258 * Buffer up the data we just read. If that fails, there's
2259 * little we can do but send our static out-of-memory page.
2261 if (add_to_iob(csp, buf, len))
2263 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2264 rsp = cgi_error_memory();
2265 send_crunch_response(csp, rsp);
2266 mark_server_socket_tainted(csp);
2270 /* Convert iob into something sed() can digest */
2271 if (JB_ERR_PARSE == get_server_headers(csp))
2276 * Well, we tried our MS IIS/5 hack and it didn't work.
2277 * The header is incomplete and there isn't anything
2278 * we can do about it.
2280 log_error(LOG_LEVEL_ERROR, "Invalid server headers. "
2281 "Applying the MS IIS5 hack didn't help.");
2282 log_error(LOG_LEVEL_CLF,
2283 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2284 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2285 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2286 mark_server_socket_tainted(csp);
2292 * Since we have to wait for more from the server before
2293 * we can parse the headers we just continue here.
2295 log_error(LOG_LEVEL_CONNECT,
2296 "Continuing buffering headers. Bytes most recently read: %d.",
2304 * Account for the content bytes we
2305 * might have gotten with the headers.
2307 assert(csp->iob->eod >= csp->iob->cur);
2308 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
2311 /* Did we actually get anything? */
2312 if (NULL == csp->headers->first)
2314 if ((csp->flags & CSP_FLAG_REUSED_CLIENT_CONNECTION))
2316 log_error(LOG_LEVEL_ERROR,
2317 "Empty server or forwarder response received on socket %d. "
2318 "Closing client connection %d without sending data.",
2319 csp->server_connection.sfd, csp->cfd);
2323 log_error(LOG_LEVEL_ERROR,
2324 "Empty server or forwarder response received on socket %d.",
2325 csp->server_connection.sfd);
2326 send_crunch_response(csp, error_response(csp, "no-server-data"));
2328 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2329 free_http_request(http);
2330 mark_server_socket_tainted(csp);
2334 assert(csp->headers->first->str);
2336 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
2337 strncmpic(csp->headers->first->str, "ICY", 3))
2340 * It doesn't look like a HTTP (or Shoutcast) response:
2341 * tell the client and log the problem.
2343 if (strlen(csp->headers->first->str) > 30)
2345 csp->headers->first->str[30] = '\0';
2347 log_error(LOG_LEVEL_ERROR,
2348 "Invalid server or forwarder response. Starts with: %s",
2349 csp->headers->first->str);
2350 log_error(LOG_LEVEL_CLF,
2351 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2352 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2353 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2354 free_http_request(http);
2355 mark_server_socket_tainted(csp);
2360 * We have now received the entire server header,
2361 * filter it and send the result to the client
2363 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
2365 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2367 hdr = list_to_text(csp->headers);
2370 /* FIXME Should handle error properly */
2371 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2374 csp->server_connection.response_received = time(NULL);
2376 if (crunch_response_triggered(csp, crunchers_light))
2379 * One of the tags created by a server-header
2380 * tagger triggered a crunch. We already
2381 * delivered the crunch response to the client
2382 * and are done here after cleaning up.
2385 mark_server_socket_tainted(csp);
2388 /* Buffer and pcrs filter this if appropriate. */
2390 if (!http->ssl) /* We talk plaintext */
2392 content_filter = get_filter_function(csp);
2395 * Only write if we're not buffering for content modification
2397 if (!content_filter)
2400 * Write the server's (modified) header to
2401 * the client (along with anything else that
2402 * may be in the buffer)
2405 if (write_socket(csp->cfd, hdr, strlen(hdr))
2406 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
2408 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2411 * The write failed, so don't bother mentioning it
2412 * to the client... it probably can't hear us anyway.
2415 mark_server_socket_tainted(csp);
2420 /* we're finished with the server's header */
2426 * If this was a MS IIS/5 hack then it means the server
2427 * has already closed the connection. Nothing more to read.
2432 log_error(LOG_LEVEL_ERROR,
2433 "Closed server connection detected. "
2434 "Applying the MS IIS5 hack didn't help.");
2435 log_error(LOG_LEVEL_CLF,
2436 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2437 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2438 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2439 mark_server_socket_tainted(csp);
2445 mark_server_socket_tainted(csp);
2446 return; /* huh? we should never get here */
2449 if (csp->content_length == 0)
2452 * If Privoxy didn't recalculate the Content-Lenght,
2453 * byte_count is still correct.
2455 csp->content_length = byte_count;
2458 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2459 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2460 && (csp->expected_content_length != byte_count))
2462 log_error(LOG_LEVEL_CONNECT,
2463 "Received %llu bytes while expecting %llu.",
2464 byte_count, csp->expected_content_length);
2465 mark_server_socket_tainted(csp);
2469 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
2470 csp->ip_addr_str, http->ocmd, csp->content_length);
2472 csp->server_connection.timestamp = time(NULL);
2476 /*********************************************************************
2480 * Description : This is little more than chat. We only "serve" to
2481 * to close (or remember) any socket that chat may have
2485 * 1 : csp = Current client state (buffers, headers, etc...)
2489 *********************************************************************/
2491 void serve(struct client_state *csp)
2492 #else /* ifndef AMIGA */
2493 static void serve(struct client_state *csp)
2494 #endif /* def AMIGA */
2496 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2497 #ifdef FEATURE_CONNECTION_SHARING
2498 static int monitor_thread_running = 0;
2499 #endif /* def FEATURE_CONNECTION_SHARING */
2500 int continue_chatting = 0;
2504 unsigned int latency;
2508 latency = (unsigned)(csp->server_connection.response_received -
2509 csp->server_connection.request_sent) / 2;
2511 continue_chatting = (csp->config->feature_flags
2512 & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
2513 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)
2514 && !(csp->flags & CSP_FLAG_SERVER_SOCKET_TAINTED)
2515 && (csp->cfd != JB_INVALID_SOCKET)
2516 && (csp->server_connection.sfd != JB_INVALID_SOCKET)
2517 && socket_is_still_usable(csp->server_connection.sfd)
2518 && (latency < csp->server_connection.keep_alive_timeout);
2520 if (continue_chatting)
2522 unsigned int client_timeout;
2524 if (!(csp->flags & CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET))
2526 log_error(LOG_LEVEL_CONNECT, "The server didn't specify how long "
2527 "the connection will stay open. Assume it's only a second.");
2528 csp->server_connection.keep_alive_timeout = 1;
2531 client_timeout = (unsigned)csp->server_connection.keep_alive_timeout - latency;
2533 log_error(LOG_LEVEL_CONNECT,
2534 "Waiting for the next client request. "
2535 "Keeping the server socket %d to %s open.",
2536 csp->server_connection.sfd, csp->server_connection.host);
2538 if ((csp->flags & CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE)
2539 && data_is_available(csp->cfd, (int)client_timeout)
2540 && socket_is_still_usable(csp->cfd))
2542 log_error(LOG_LEVEL_CONNECT, "Client request arrived in "
2543 "time or the client closed the connection.");
2545 * Get the csp in a mostly vergin state again.
2546 * XXX: Should be done elsewhere.
2548 csp->content_type = 0;
2549 csp->content_length = 0;
2550 csp->expected_content_length = 0;
2551 csp->expected_client_content_length = 0;
2552 list_remove_all(csp->headers);
2553 freez(csp->iob->buf);
2554 memset(csp->iob, 0, sizeof(csp->iob));
2555 freez(csp->error_message);
2556 free_http_request(csp->http);
2557 destroy_list(csp->headers);
2558 destroy_list(csp->tags);
2559 free_current_action(csp->action);
2560 if (NULL != csp->fwd)
2562 unload_forward_spec(csp->fwd);
2566 /* XXX: Store per-connection flags someplace else. */
2567 csp->flags = CSP_FLAG_ACTIVE |
2568 (csp->flags & CSP_FLAG_TOGGLED_ON) | CSP_FLAG_REUSED_CLIENT_CONNECTION;
2572 log_error(LOG_LEVEL_CONNECT,
2573 "No additional client request received in time.");
2574 #ifdef FEATURE_CONNECTION_SHARING
2575 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_SHARING)
2576 && (socket_is_still_usable(csp->server_connection.sfd)))
2578 time_t time_open = time(NULL) - csp->server_connection.timestamp;
2580 if (csp->server_connection.keep_alive_timeout < time_open + latency)
2585 remember_connection(&csp->server_connection);
2586 csp->server_connection.sfd = JB_INVALID_SOCKET;
2587 close_socket(csp->cfd);
2588 csp->cfd = JB_INVALID_SOCKET;
2589 privoxy_mutex_lock(&connection_reuse_mutex);
2590 if (!monitor_thread_running)
2592 monitor_thread_running = 1;
2593 privoxy_mutex_unlock(&connection_reuse_mutex);
2594 wait_for_alive_connections();
2595 privoxy_mutex_lock(&connection_reuse_mutex);
2596 monitor_thread_running = 0;
2598 privoxy_mutex_unlock(&connection_reuse_mutex);
2600 #endif /* def FEATURE_CONNECTION_SHARING */
2604 else if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2606 log_error(LOG_LEVEL_CONNECT,
2607 "The connection on server socket %d to %s isn't reusable. "
2608 "Closing.", csp->server_connection.sfd, csp->server_connection.host);
2610 } while (continue_chatting);
2612 mark_connection_closed(&csp->server_connection);
2615 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
2617 if (csp->server_connection.sfd != JB_INVALID_SOCKET)
2619 #ifdef FEATURE_CONNECTION_SHARING
2620 forget_connection(csp->server_connection.sfd);
2621 #endif /* def FEATURE_CONNECTION_SHARING */
2622 close_socket(csp->server_connection.sfd);
2625 if (csp->cfd != JB_INVALID_SOCKET)
2627 close_socket(csp->cfd);
2630 csp->flags &= ~CSP_FLAG_ACTIVE;
2636 /*********************************************************************
2638 * Function : server_thread
2640 * Description : We only exist to call `serve' in a threaded environment.
2643 * 1 : data = Current client state (buffers, headers, etc...)
2645 * Returns : Always 0.
2647 *********************************************************************/
2648 static int32 server_thread(void *data)
2650 serve((struct client_state *) data);
2657 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2658 /*********************************************************************
2662 * Description : Print usage info & exit.
2664 * Parameters : Pointer to argv[0] for identifying ourselves
2668 *********************************************************************/
2669 static void usage(const char *myname)
2671 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2675 #endif /* defined(unix) */
2678 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
2679 #endif /* defined(unix) */
2680 "[--version] [configfile]\n"
2681 "Aborting\n", myname);
2686 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
2689 #ifdef MUTEX_LOCKS_AVAILABLE
2690 /*********************************************************************
2692 * Function : privoxy_mutex_lock
2694 * Description : Locks a mutex.
2697 * 1 : mutex = The mutex to lock.
2699 * Returns : Void. May exit in case of errors.
2701 *********************************************************************/
2702 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
2704 #ifdef FEATURE_PTHREAD
2705 int err = pthread_mutex_lock(mutex);
2708 if (mutex != &log_mutex)
2710 log_error(LOG_LEVEL_FATAL,
2711 "Mutex locking failed: %s.\n", strerror(err));
2716 EnterCriticalSection(mutex);
2717 #endif /* def FEATURE_PTHREAD */
2721 /*********************************************************************
2723 * Function : privoxy_mutex_unlock
2725 * Description : Unlocks a mutex.
2728 * 1 : mutex = The mutex to unlock.
2730 * Returns : Void. May exit in case of errors.
2732 *********************************************************************/
2733 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
2735 #ifdef FEATURE_PTHREAD
2736 int err = pthread_mutex_unlock(mutex);
2739 if (mutex != &log_mutex)
2741 log_error(LOG_LEVEL_FATAL,
2742 "Mutex unlocking failed: %s.\n", strerror(err));
2747 LeaveCriticalSection(mutex);
2748 #endif /* def FEATURE_PTHREAD */
2752 /*********************************************************************
2754 * Function : privoxy_mutex_init
2756 * Description : Prepares a mutex.
2759 * 1 : mutex = The mutex to initialize.
2761 * Returns : Void. May exit in case of errors.
2763 *********************************************************************/
2764 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
2766 #ifdef FEATURE_PTHREAD
2767 int err = pthread_mutex_init(mutex, 0);
2770 printf("Fatal error. Mutex initialization failed: %s.\n",
2775 InitializeCriticalSection(mutex);
2776 #endif /* def FEATURE_PTHREAD */
2778 #endif /* def MUTEX_LOCKS_AVAILABLE */
2780 /*********************************************************************
2782 * Function : initialize_mutexes
2784 * Description : Prepares mutexes if mutex support is available.
2788 * Returns : Void, exits in case of errors.
2790 *********************************************************************/
2791 static void initialize_mutexes(void)
2793 #ifdef MUTEX_LOCKS_AVAILABLE
2795 * Prepare global mutex semaphores
2797 privoxy_mutex_init(&log_mutex);
2798 privoxy_mutex_init(&log_init_mutex);
2799 privoxy_mutex_init(&connection_reuse_mutex);
2802 * XXX: The assumptions below are a bit naive
2803 * and can cause locks that aren't necessary.
2805 * For example older FreeBSD versions (< 6.x?)
2806 * have no gethostbyname_r, but gethostbyname is
2809 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
2810 privoxy_mutex_init(&resolver_mutex);
2811 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
2813 * XXX: should we use a single mutex for
2814 * localtime() and gmtime() as well?
2816 #ifndef HAVE_GMTIME_R
2817 privoxy_mutex_init(&gmtime_mutex);
2818 #endif /* ndef HAVE_GMTIME_R */
2820 #ifndef HAVE_LOCALTIME_R
2821 privoxy_mutex_init(&localtime_mutex);
2822 #endif /* ndef HAVE_GMTIME_R */
2825 privoxy_mutex_init(&rand_mutex);
2826 #endif /* ndef HAVE_RANDOM */
2827 #endif /* def MUTEX_LOCKS_AVAILABLE */
2831 /*********************************************************************
2835 * Description : Load the config file and start the listen loop.
2836 * This function is a lot more *sane* with the `load_config'
2837 * and `listen_loop' functions; although it stills does
2838 * a *little* too much for my taste.
2841 * 1 : argc = Number of parameters (including $0).
2842 * 2 : argv = Array of (char *)'s to the parameters.
2844 * Returns : 1 if : can't open config file, unrecognized directive,
2845 * stats requested in multi-thread mode, can't open the
2846 * log file, can't open the jar file, listen port is invalid,
2847 * any load fails, and can't bind port.
2849 * Else main never returns, the process must be signaled
2850 * to terminate execution. Or, on Windows, use the
2851 * "File", "Exit" menu option.
2853 *********************************************************************/
2855 int real_main(int argc, char **argv)
2857 int main(int argc, char **argv)
2861 unsigned int random_seed;
2863 struct passwd *pw = NULL;
2864 struct group *grp = NULL;
2867 char *pre_chroot_nslookup_to_load_resolver = NULL;
2874 #if !defined(_WIN32)
2881 /* Prepare mutexes if supported and necessary. */
2882 initialize_mutexes();
2884 /* Enable logging until further notice. */
2888 * Parse the command line arguments
2890 * XXX: simply printing usage information in case of
2891 * invalid arguments isn't particularly user friendly.
2893 while (++argc_pos < argc)
2896 /* Check to see if the service must be installed or uninstalled */
2897 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2899 const char *pName = argv[argc_pos] + 9;
2902 exit( (install_service(pName)) ? 0 : 1 );
2904 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2906 const char *pName = argv[argc_pos] + 11;
2909 exit((uninstall_service(pName)) ? 0 : 1);
2911 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2913 bRunAsService = TRUE;
2914 w32_set_service_cwd();
2915 atexit(w32_service_exit_notify);
2918 #endif /* defined(_WIN32) */
2921 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2923 if (strcmp(argv[argc_pos], "--help") == 0)
2928 else if(strcmp(argv[argc_pos], "--version") == 0)
2930 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2936 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2938 set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
2942 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2944 if (++argc_pos == argc) usage(argv[0]);
2945 pidfile = strdup(argv[argc_pos]);
2948 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2950 if (++argc_pos == argc) usage(argv[argc_pos]);
2952 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2955 if (NULL == (grp = getgrnam(p)))
2957 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2961 if (NULL == (pw = getpwnam(argv[argc_pos])))
2963 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2966 if (p != NULL) *--p = '\0';
2969 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
2971 if (++argc_pos == argc) usage(argv[0]);
2972 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
2975 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2979 #endif /* defined(unix) */
2981 else if (argc_pos + 1 != argc)
2984 * This is neither the last command line
2985 * option, nor was it recognized before,
2986 * therefore it must be invalid.
2992 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2994 configfile = argv[argc_pos];
2997 } /* -END- while (more arguments) */
2999 show_version(Argv[0]);
3002 if ( *configfile != '/' )
3004 char cwd[BUFFER_SIZE];
3006 size_t abs_file_size;
3008 /* make config-filename absolute here */
3009 if (NULL == getcwd(cwd, sizeof(cwd)))
3011 perror("failed to get current working directory");
3016 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3017 basedir = strdup(cwd);
3019 if (NULL == basedir ||
3020 NULL == (abs_file = malloc(abs_file_size)))
3022 perror("malloc failed");
3025 strlcpy(abs_file, basedir, abs_file_size);
3026 strlcat(abs_file, "/", abs_file_size );
3027 strlcat(abs_file, configfile, abs_file_size);
3028 configfile = abs_file;
3030 #endif /* defined unix */
3034 clients->next = NULL;
3036 /* XXX: factor out initialising after the next stable release. */
3039 #elif defined(_WIN32)
3043 random_seed = (unsigned int)time(NULL);
3045 srandom(random_seed);
3048 #endif /* ifdef HAVE_RANDOM */
3051 * Unix signal handling
3053 * Catch the abort, interrupt and terminate signals for a graceful exit
3054 * Catch the hangup signal so the errlog can be reopened.
3055 * Ignore the broken pipe signals (FIXME: Why?)
3057 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3060 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3061 const int ignored_signals[] = { SIGPIPE, 0 };
3063 for (idx = 0; catched_signals[idx] != 0; idx++)
3065 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3066 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3068 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3069 #endif /* ifdef sun */
3071 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3075 for (idx = 0; ignored_signals[idx] != 0; idx++)
3077 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3079 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3084 #else /* ifdef _WIN32 */
3085 # ifdef _WIN_CONSOLE
3087 * We *are* in a windows console app.
3088 * Print a verbose messages about FAQ's and such
3090 printf("%s", win32_blurb);
3091 # endif /* def _WIN_CONSOLE */
3092 #endif /* def _WIN32 */
3095 /* Initialize the CGI subsystem */
3096 cgi_init_error_messages();
3099 * If runnig on unix and without the --nodaemon
3100 * option, become a daemon. I.e. fork, detach
3101 * from tty and get process group leadership
3114 if ( pid < 0 ) /* error */
3119 else if ( pid != 0 ) /* parent */
3124 * must check for errors
3125 * child died due to missing files aso
3128 wpid = waitpid( pid, &status, WNOHANG );
3137 /* Should be more portable, but not as well tested */
3142 #else /* ndef __FreeBSD__ */
3144 #endif /* ndef __FreeBSD__ */
3145 fd = open("/dev/tty", O_RDONLY);
3148 /* no error check here */
3149 ioctl( fd, TIOCNOTTY,0 );
3154 * stderr (fd 2) will be closed later on,
3155 * when the config file has been parsed.
3162 } /* -END- if (!no_daemon) */
3165 * As soon as we have written the PID file, we can switch
3166 * to the user and group ID indicated by the --user option
3172 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3174 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3178 if (setgroups(1, &grp->gr_gid))
3180 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
3183 else if (initgroups(pw->pw_name, pw->pw_gid))
3185 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
3191 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3193 /* Read the time zone file from /etc before doing chroot. */
3195 if (NULL != pre_chroot_nslookup_to_load_resolver
3196 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3198 /* Initialize resolver library. */
3199 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3201 if (chroot(pw->pw_dir) < 0)
3203 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3207 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3210 if (setuid(pw->pw_uid))
3212 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3216 char putenv_dummy[64];
3218 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3219 if (putenv(putenv_dummy) != 0)
3221 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3224 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3225 if (putenv(putenv_dummy) != 0)
3227 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3233 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3236 #endif /* defined unix */
3239 /* This will be FALSE unless the command line specified --service
3243 /* Yup, so now we must attempt to establish a connection
3244 * with the service dispatcher. This will only work if this
3245 * process was launched by the service control manager to
3246 * actually run as a service. If this isn't the case, i've
3247 * known it take around 30 seconds or so for the call to return.
3250 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3251 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3253 /* Service has run, and at this point is now being stopped, so just return */
3258 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3260 /* An error occurred. Usually it's because --service was wrongly specified
3261 * and we were unable to connect to the Service Control Dispatcher because
3262 * it wasn't expecting us and is therefore not listening.
3264 * For now, just continue below to call the listen_loop function.
3267 #endif /* def _WIN32 */
3277 /*********************************************************************
3279 * Function : bind_port_helper
3281 * Description : Bind the listen port. Handles logging, and aborts
3285 * 1 : config = Privoxy configuration. Specifies port
3288 * Returns : Port that was opened.
3290 *********************************************************************/
3291 static jb_socket bind_port_helper(struct configuration_spec * config)
3296 if (config->haddr == NULL)
3298 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3303 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3304 config->hport, config->haddr);
3307 result = bind_port(config->haddr, config->hport, &bfd);
3314 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3315 "There may be another Privoxy or some other "
3316 "proxy running on port %d",
3317 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3318 config->hport, config->hport);
3321 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3322 "The hostname is not resolvable",
3323 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3326 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: %E",
3327 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3330 /* shouldn't get here */
3331 return JB_INVALID_SOCKET;
3334 config->need_bind = 0;
3341 /* Without this simple workaround we get this compiler warning from _beginthread
3342 * warning C4028: formal parameter 1 different from declaration
3344 void w32_service_listen_loop(void *p)
3348 #endif /* def _WIN32 */
3351 /*********************************************************************
3353 * Function : listen_loop
3355 * Description : bind the listen port and enter a "FOREVER" listening loop.
3361 *********************************************************************/
3362 static void listen_loop(void)
3364 struct client_state *csp = NULL;
3366 struct configuration_spec *config;
3367 unsigned int active_threads = 0;
3369 config = load_config();
3371 #ifdef FEATURE_CONNECTION_SHARING
3373 * XXX: Should be relocated once it no
3374 * longer needs to emit log messages.
3376 initialize_reusable_connections();
3377 #endif /* def FEATURE_CONNECTION_SHARING */
3379 bfd = bind_port_helper(config);
3381 #ifdef FEATURE_GRACEFUL_TERMINATION
3382 while (!g_terminate)
3387 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3388 while (waitpid(-1, NULL, WNOHANG) > 0)
3390 /* zombie children */
3392 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3395 * Free data that was used by died threads
3397 active_threads = sweep();
3401 * Re-open the errlog after HUP signal
3403 if (received_hup_signal)
3405 if (NULL != config->logfile)
3407 init_error_log(Argv[0], config->logfile);
3409 received_hup_signal = 0;
3413 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3415 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3419 csp->flags |= CSP_FLAG_ACTIVE;
3420 csp->server_connection.sfd = JB_INVALID_SOCKET;
3422 csp->config = config = load_config();
3424 if ( config->need_bind )
3427 * Since we were listening to the "old port", we will not see
3428 * a "listen" param change until the next request. So, at
3429 * least 1 more request must be made for us to find the new
3430 * setting. I am simply closing the old socket and binding the
3433 * Which-ever is correct, we will serve 1 more page via the
3434 * old settings. This should probably be a "show-proxy-args"
3435 * request. This should not be a so common of an operation
3436 * that this will hurt people's feelings.
3441 bfd = bind_port_helper(config);
3444 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3446 if (!accept_connection(csp, bfd))
3448 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3461 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3464 #ifdef FEATURE_TOGGLE
3465 if (global_toggle_state)
3466 #endif /* def FEATURE_TOGGLE */
3468 csp->flags |= CSP_FLAG_TOGGLED_ON;
3471 if (run_loader(csp))
3473 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3474 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3478 if (block_acl(NULL,csp))
3480 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
3481 close_socket(csp->cfd);
3482 freez(csp->ip_addr_str);
3486 #endif /* def FEATURE_ACL */
3488 if ((0 != config->max_client_connections)
3489 && (active_threads >= config->max_client_connections))
3491 log_error(LOG_LEVEL_CONNECT,
3492 "Rejecting connection from %s. Maximum number of connections reached.",
3494 write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
3495 strlen(TOO_MANY_CONNECTIONS_RESPONSE));
3496 close_socket(csp->cfd);
3497 freez(csp->ip_addr_str);
3502 /* add it to the list of clients */
3503 csp->next = clients->next;
3504 clients->next = csp;
3506 if (config->multi_threaded)
3510 /* this is a switch () statment in the C preprocessor - ugh */
3511 #undef SELECTED_ONE_OPTION
3513 /* Use Pthreads in preference to native code */
3514 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3515 #define SELECTED_ONE_OPTION
3517 pthread_t the_thread;
3518 pthread_attr_t attrs;
3520 pthread_attr_init(&attrs);
3521 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3522 errno = pthread_create(&the_thread, &attrs,
3523 (void * (*)(void *))serve, csp);
3524 child_id = errno ? -1 : 0;
3525 pthread_attr_destroy(&attrs);
3529 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3530 #define SELECTED_ONE_OPTION
3531 child_id = _beginthread(
3532 (void (*)(void *))serve,
3537 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3538 #define SELECTED_ONE_OPTION
3539 child_id = _beginthread(
3540 (void(* _Optlink)(void*))serve,
3546 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3547 #define SELECTED_ONE_OPTION
3549 thread_id tid = spawn_thread
3550 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3552 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3554 child_id = (int) tid;
3563 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3564 #define SELECTED_ONE_OPTION
3565 csp->cfd = ReleaseSocket(csp->cfd, -1);
3568 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3569 NP_Output, Output(),
3570 NP_CloseOutput, FALSE,
3571 NP_Name, (ULONG)"privoxy child",
3575 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3576 NP_Output, Output(),
3577 NP_CloseOutput, FALSE,
3578 NP_Name, (ULONG)"privoxy child",
3579 NP_StackSize, 200*1024,
3585 ((struct Task *)child_id)->tc_UserData = csp;
3586 Signal((struct Task *)child_id, SIGF_SINGLE);
3591 #if !defined(SELECTED_ONE_OPTION)
3594 /* This block is only needed when using fork().
3595 * When using threads, the server thread was
3596 * created and run by the call to _beginthread().
3598 if (child_id == 0) /* child */
3601 #ifdef FEATURE_TOGGLE
3602 int inherited_toggle_state = global_toggle_state;
3603 #endif /* def FEATURE_TOGGLE */
3608 * If we've been toggled or we've blocked the request, tell Mom
3611 #ifdef FEATURE_TOGGLE
3612 if (inherited_toggle_state != global_toggle_state)
3614 rc |= RC_FLAG_TOGGLED;
3616 #endif /* def FEATURE_TOGGLE */
3618 #ifdef FEATURE_STATISTICS
3619 if (csp->flags & CSP_FLAG_REJECTED)
3621 rc |= RC_FLAG_BLOCKED;
3623 #endif /* ndef FEATURE_STATISTICS */
3627 else if (child_id > 0) /* parent */
3629 /* in a fork()'d environment, the parent's
3630 * copy of the client socket and the CSP
3634 #if !defined(_WIN32) && !defined(__CYGWIN__)
3636 wait( &child_status );
3639 * Evaluate child's return code: If the child has
3640 * - been toggled, toggle ourselves
3641 * - blocked its request, bump up the stats counter
3644 #ifdef FEATURE_TOGGLE
3645 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
3647 global_toggle_state = !global_toggle_state;
3649 #endif /* def FEATURE_TOGGLE */
3651 #ifdef FEATURE_STATISTICS
3653 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
3657 #endif /* def FEATURE_STATISTICS */
3659 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
3660 close_socket(csp->cfd);
3661 csp->flags &= ~CSP_FLAG_ACTIVE;
3665 #undef SELECTED_ONE_OPTION
3666 /* end of cpp switch () */
3671 * Spawning the child failed, assume it's because
3672 * there are too many children running already.
3673 * XXX: If you assume ...
3675 log_error(LOG_LEVEL_ERROR,
3676 "Unable to take any additional connections: %E");
3677 write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE,
3678 strlen(TOO_MANY_CONNECTIONS_RESPONSE));
3679 close_socket(csp->cfd);
3680 csp->flags &= ~CSP_FLAG_ACTIVE;
3689 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
3691 /* Clean up. Aim: free all memory (no leaks) */
3692 #ifdef FEATURE_GRACEFUL_TERMINATION
3694 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
3696 unload_current_config_file();
3697 unload_current_actions_file();
3698 unload_current_re_filterfile();
3699 #ifdef FEATURE_TRUST
3700 unload_current_trust_file();
3703 if (config->multi_threaded)
3710 } while ((clients->next != NULL) && (--i > 0));
3714 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
3725 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
3726 /* Cleanup - remove taskbar icon etc. */
3731 #endif /* FEATURE_GRACEFUL_TERMINATION */