X-Git-Url: http://www.privoxy.org/gitweb/?p=privoxy.git;a=blobdiff_plain;f=jcc.c;h=7ca0f46f79e1d8e28a3434466b9011b8ff0707e0;hp=414e5fc09612539bbd91d60ed9af2937f50a03eb;hb=2ef78e00152922cdb1c30f0d9ad0dfe31317b6f5;hpb=9fe3265701787ccb1865ed5aaa05d164ce9559b7 diff --git a/jcc.c b/jcc.c index 414e5fc0..7ca0f46f 100644 --- a/jcc.c +++ b/jcc.c @@ -1,4 +1,4 @@ -const char jcc_rcs[] = "$Id: jcc.c,v 1.225 2009/02/19 18:09:32 fabiankeil Exp $"; +const char jcc_rcs[] = "$Id: jcc.c,v 1.244 2009/04/17 11:34:34 fabiankeil Exp $"; /********************************************************************* * * File : $Source: /cvsroot/ijbswa/current/jcc.c,v $ @@ -33,6 +33,81 @@ const char jcc_rcs[] = "$Id: jcc.c,v 1.225 2009/02/19 18:09:32 fabiankeil Exp $" * * Revisions : * $Log: jcc.c,v $ + * Revision 1.244 2009/04/17 11:34:34 fabiankeil + * Style cosmetics for the IPv6 code. + * + * Revision 1.243 2009/04/17 11:27:49 fabiankeil + * Petr Pisar's privoxy-3.0.12-ipv6-3.diff. + * + * Revision 1.242 2009/04/11 10:44:47 fabiankeil + * Update a comment. We're not in Kansas anymore. + * + * Revision 1.241 2009/04/11 10:37:23 fabiankeil + * When dropping connections due to ACL, don't leak csp->ip_addr_str. + * + * Revision 1.240 2009/04/09 10:12:54 fabiankeil + * Fix two cases in which an invalid server response would result + * in the client connection being closed without sending an error + * message first. + * + * Revision 1.239 2009/04/07 11:43:50 fabiankeil + * If the server rudely resets the connection directly after sending the + * headers, pass the mess to the client instead of sending an incorrect + * connect-failed message. Fixes #2698674 reported by mybugaccount. + * + * Revision 1.238 2009/03/27 14:42:30 fabiankeil + * Correct the status code for CONNECTION_TIMEOUT_RESPONSE. + * + * Revision 1.237 2009/03/27 14:32:04 fabiankeil + * If spawning a child in listen_loop() fails, send a real + * HTTP response to the client and continue listening for + * new connections without artificial delay. + * + * Revision 1.236 2009/03/25 17:30:24 fabiankeil + * In serve(), keep the client socket open until we marked the + * server socket as unused. This should increase the chances + * that we reuse the connection for the client's next request + * to the same destination. + * + * Revision 1.235 2009/03/18 21:01:20 fabiankeil + * Comment fix. Spotted by Roland. + * + * Revision 1.234 2009/03/18 20:48:42 fabiankeil + * If the --no-daemon option is used, enable LOG_LEVEL_INFO + * before the config file has been parsed (as we always did). + * + * Revision 1.233 2009/03/13 14:10:07 fabiankeil + * Fix some more harmless warnings on amd64. + * + * Revision 1.232 2009/03/08 19:29:16 fabiankeil + * Reinitialize the timeout structure every time before passing + * it to select(). Apparently some implementations mess with it. + * Probably fixes #2669131 reported by cyberpatrol. + * + * Revision 1.231 2009/03/08 14:19:23 fabiankeil + * Fix justified (but harmless) compiler warnings + * on platforms where sizeof(int) < sizeof(long). + * + * Revision 1.230 2009/03/07 13:09:17 fabiankeil + * Change csp->expected_content and_csp->expected_content_length from + * size_t to unsigned long long to reduce the likelihood of integer + * overflows that would let us close the connection prematurely. + * Bug found while investigating #2669131, reported by cyberpatrol. + * + * Revision 1.229 2009/03/07 11:17:01 fabiankeil + * Fix compiler warning. + * + * Revision 1.228 2009/03/06 20:30:13 fabiankeil + * Log unsigned values as such. + * + * Revision 1.227 2009/03/02 19:18:11 fabiankeil + * Streamline parse_http_request()'s prototype. As + * cparser pointed out it doesn't actually use csp. + * + * Revision 1.226 2009/03/01 18:28:24 fabiankeil + * Help clang understand that we aren't dereferencing + * NULL pointers here. + * * Revision 1.225 2009/02/19 18:09:32 fabiankeil * Unbreak build without FEATURE_CONNECTION_KEEP_ALIVE. * Noticed by David. @@ -1429,9 +1504,16 @@ static const char MESSED_UP_REQUEST_RESPONSE[] = "Connection: close\r\n\r\n" "Bad request. Messed up with header filters.\r\n"; +static const char TOO_MANY_CONNECTIONS_RESPONSE[] = + "HTTP/1.0 503 Too many open connections\r\n" + "Proxy-Agent: Privoxy " VERSION "\r\n" + "Content-Type: text/plain\r\n" + "Connection: close\r\n\r\n" + "Maximum number of open connections reached.\r\n"; + /* XXX: should be a template */ static const char CONNECTION_TIMEOUT_RESPONSE[] = - "HTTP/1.0 502 Connection timeout\r\n" + "HTTP/1.0 504 Connection timeout\r\n" "Proxy-Agent: Privoxy " VERSION "\r\n" "Content-Type: text/plain\r\n" "Connection: close\r\n\r\n" @@ -1887,7 +1969,7 @@ static void send_crunch_response(const struct client_state *csp, struct http_res /* Log that the request was crunched and why. */ log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url); - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d", + log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %u", csp->ip_addr_str, http->ocmd, status_code, rsp->content_length); /* Clean up and return */ @@ -1944,7 +2026,7 @@ static int request_contains_null_bytes(const struct client_state *csp, char *buf } while (tmp_len < len); log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte " - "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len); + "(length=%d, strlen=%u).", csp->ip_addr_str, len, c_len); log_error(LOG_LEVEL_HEADER, "Offending request data with NULL bytes turned into \'°\' characters: %s", buf); @@ -2113,7 +2195,7 @@ static jb_err change_request_destination(struct client_state *csp) log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str); free_http_request(http); - err = parse_http_request(csp->headers->first->str, http, csp); + err = parse_http_request(csp->headers->first->str, http); if (JB_ERR_OK != err) { log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.", @@ -2150,9 +2232,10 @@ static jb_err change_request_destination(struct client_state *csp) * FALSE otherwise. * *********************************************************************/ -static int server_response_is_complete(struct client_state *csp, size_t content_length) +static int server_response_is_complete(struct client_state *csp, + unsigned long long content_length) { - int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET); + int content_length_known = !!(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET); if (!strcmpic(csp->http->gpc, "HEAD")) { @@ -2351,7 +2434,7 @@ static jb_err receive_client_request(struct client_state *csp) } #endif /* def FEATURE_FORCE_LOAD */ - err = parse_http_request(req, http, csp); + err = parse_http_request(req, http); freez(req); if (JB_ERR_OK != err) { @@ -2560,12 +2643,12 @@ static void chat(struct client_state *csp) jb_socket maxfd; int server_body; int ms_iis5_hack = 0; - size_t byte_count = 0; + unsigned long long byte_count = 0; int forwarded_connect_retries = 0; int max_forwarded_connect_retries = csp->config->forwarded_connect_retries; const struct forward_spec *fwd; struct http_request *http; - int len = 0; /* for buffer sizes (and negative error codes) */ + long len = 0; /* for buffer sizes (and negative error codes) */ /* Function that does the content filtering for the current request */ filter_function_ptr content_filter = NULL; @@ -2575,8 +2658,6 @@ static void chat(struct client_state *csp) struct timeval timeout; memset(buf, 0, sizeof(buf)); - memset(&timeout, 0, sizeof(timeout)); - timeout.tv_sec = csp->config->socket_timeout; http = csp->http; @@ -2672,7 +2753,7 @@ static void chat(struct client_state *csp) if (fwd->forward_host) { - log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s", + log_error(LOG_LEVEL_CONNECT, "via [%s]:%d to: %s", fwd->forward_host, fwd->forward_port, http->hostport); } else @@ -2799,15 +2880,15 @@ static void chat(struct client_state *csp) log_error(LOG_LEVEL_CONNECT, "Looks like we read the last chunk together with " "the server headers. We better stop reading."); - byte_count = (size_t)(csp->iob->eod - csp->iob->cur); + byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur); csp->expected_content_length = byte_count; csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET; } if (server_body && server_response_is_complete(csp, byte_count)) { log_error(LOG_LEVEL_CONNECT, - "Done reading from server. Expected content length: %d. " - "Actual content length: %d. Most recently received: %d.", + "Done reading from server. Expected content length: %llu. " + "Actual content length: %llu. Most recently received: %d.", csp->expected_content_length, byte_count, len); len = 0; /* @@ -2818,6 +2899,8 @@ static void chat(struct client_state *csp) } #endif /* FEATURE_CONNECTION_KEEP_ALIVE */ + timeout.tv_sec = csp->config->socket_timeout; + timeout.tv_usec = 0; n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout); if (n == 0) @@ -2902,14 +2985,11 @@ static void chat(struct client_state *csp) mark_server_socket_tainted(csp); return; } - - rsp = error_response(csp, "connect-failed", errno); - if (rsp) - { - send_crunch_response(csp, rsp); - } - - return; + /* + * XXX: Consider handling the cases above the same. + */ + mark_server_socket_tainted(csp); + len = 0; } #ifdef FEATURE_CONNECTION_KEEP_ALIVE @@ -2921,7 +3001,7 @@ static void chat(struct client_state *csp) log_error(LOG_LEVEL_CONNECT, "Looks like we reached the end of the last chunk. " "We better stop reading."); - csp->expected_content_length = byte_count + (size_t)len; + csp->expected_content_length = byte_count + (unsigned long long)len; csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET; } } @@ -2990,7 +3070,8 @@ static void chat(struct client_state *csp) } if (write_socket(csp->cfd, hdr, strlen(hdr)) - || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length)) + || write_socket(csp->cfd, + ((p != NULL) ? p : csp->iob->cur), (size_t)csp->content_length)) { log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E"); freez(hdr); @@ -3038,7 +3119,7 @@ static void chat(struct client_state *csp) if (add_to_iob(csp, buf, len)) { size_t hdrlen; - int flushed; + long flushed; log_error(LOG_LEVEL_INFO, "Flushing header and buffers. Stepping back from filtering."); @@ -3074,7 +3155,7 @@ static void chat(struct client_state *csp) * we just flushed. len will be added a few lines below, * hdrlen doesn't matter for LOG_LEVEL_CLF. */ - byte_count = (size_t)flushed; + byte_count = (unsigned long long)flushed; freez(hdr); content_filter = NULL; server_body = 1; @@ -3089,7 +3170,7 @@ static void chat(struct client_state *csp) return; } } - byte_count += (size_t)len; + byte_count += (unsigned long long)len; continue; } else @@ -3121,9 +3202,14 @@ static void chat(struct client_state *csp) * The header is incomplete and there isn't anything * we can do about it. */ - log_error(LOG_LEVEL_INFO, - "MS IIS5 hack didn't produce valid headers."); - break; + log_error(LOG_LEVEL_ERROR, "Invalid server headers. " + "Applying the MS IIS5 hack didn't help."); + log_error(LOG_LEVEL_CLF, + "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd); + write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE, + strlen(INVALID_SERVER_HEADERS_RESPONSE)); + mark_server_socket_tainted(csp); + return; } else { @@ -3131,11 +3217,11 @@ static void chat(struct client_state *csp) * Since we have to wait for more from the server before * we can parse the headers we just continue here. */ - int header_offset = csp->iob->cur - header_start; + long header_offset = csp->iob->cur - header_start; assert(csp->iob->cur >= header_start); - byte_count += (size_t)(len - header_offset); + byte_count += (unsigned long long)(len - header_offset); log_error(LOG_LEVEL_CONNECT, "Continuing buffering headers. " - "byte_count: %d. header_offset: %d. len: %d.", + "byte_count: %llu. header_offset: %d. len: %d.", byte_count, header_offset, len); continue; } @@ -3235,7 +3321,7 @@ static void chat(struct client_state *csp) return; } - byte_count += (size_t)len; + byte_count += (unsigned long long)len; } else { @@ -3243,9 +3329,9 @@ static void chat(struct client_state *csp) * XXX: the header lenght should probably * be calculated by get_server_headers(). */ - int header_length = csp->iob->cur - header_start; + long header_length = csp->iob->cur - header_start; assert(csp->iob->cur > header_start); - byte_count += (size_t)(len - header_length); + byte_count += (unsigned long long)(len - header_length); } /* we're finished with the server's header */ @@ -3260,9 +3346,15 @@ static void chat(struct client_state *csp) */ if (ms_iis5_hack) { - log_error(LOG_LEVEL_INFO, - "Closed server connection detected with MS IIS5 hack enabled."); - break; + log_error(LOG_LEVEL_ERROR, + "Closed server connection detected. " + "Applying the MS IIS5 hack didn't help."); + log_error(LOG_LEVEL_CLF, + "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd); + write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE, + strlen(INVALID_SERVER_HEADERS_RESPONSE)); + mark_server_socket_tainted(csp); + return; } } continue; @@ -3285,13 +3377,13 @@ static void chat(struct client_state *csp) && (csp->expected_content_length != byte_count)) { log_error(LOG_LEVEL_CONNECT, - "Received %d bytes while expecting %d.", + "Received %llu bytes while expecting %llu.", byte_count, csp->expected_content_length); mark_server_socket_tainted(csp); } #endif - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d", + log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu", csp->ip_addr_str, http->ocmd, csp->content_length); } @@ -3301,7 +3393,8 @@ static void chat(struct client_state *csp) * Function : serve * * Description : This is little more than chat. We only "serve" to - * to close any socket that chat may have opened. + * to close (or remember) any socket that chat may have + * opened. * * Parameters : * 1 : csp = Current client state (buffers, headers, etc...) @@ -3316,7 +3409,6 @@ static void serve(struct client_state *csp) #endif /* def AMIGA */ { chat(csp); - close_socket(csp->cfd); if (csp->sfd != JB_INVALID_SOCKET) { @@ -3327,6 +3419,8 @@ static void serve(struct client_state *csp) && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE)) { remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http)); + close_socket(csp->cfd); + csp->cfd = JB_INVALID_SOCKET; privoxy_mutex_lock(&connection_reuse_mutex); if (!monitor_thread_running) { @@ -3348,6 +3442,11 @@ static void serve(struct client_state *csp) #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */ } + if (csp->cfd != JB_INVALID_SOCKET) + { + close_socket(csp->cfd); + } + csp->flags &= ~CSP_FLAG_ACTIVE; } @@ -3656,6 +3755,7 @@ int main(int argc, const char *argv[]) else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0) { + set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO); no_daemon = 1; } @@ -3871,8 +3971,8 @@ int main(int argc, const char *argv[]) } #endif /* 1 */ /* - * stderr (fd 2) will be closed later on, when the - * log file has been parsed. + * stderr (fd 2) will be closed later on, + * when the config file has been parsed. */ close( 0 ); @@ -4083,7 +4183,8 @@ static void listen_loop(void) { struct client_state *csp = NULL; jb_socket bfd; - struct configuration_spec * config; + struct configuration_spec *config; + unsigned int active_threads = 0; config = load_config(); @@ -4113,7 +4214,7 @@ static void listen_loop(void) /* * Free data that was used by died threads */ - sweep(); + active_threads = sweep(); #if defined(unix) /* @@ -4144,7 +4245,7 @@ static void listen_loop(void) { /* * Since we were listening to the "old port", we will not see - * a "listen" param change until the next IJB request. So, at + * a "listen" param change until the next request. So, at * least 1 more request must be made for us to find the new * setting. I am simply closing the old socket and binding the * new one. @@ -4198,11 +4299,26 @@ static void listen_loop(void) { log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str); close_socket(csp->cfd); + freez(csp->ip_addr_str); freez(csp); continue; } #endif /* def FEATURE_ACL */ + if ((0 != config->max_client_connections) + && (active_threads >= config->max_client_connections)) + { + log_error(LOG_LEVEL_CONNECT, + "Rejecting connection from %s. Maximum number of connections reached.", + csp->ip_addr_str); + write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE, + strlen(TOO_MANY_CONNECTIONS_RESPONSE)); + close_socket(csp->cfd); + freez(csp->ip_addr_str); + freez(csp); + continue; + } + /* add it to the list of clients */ csp->next = clients->next; clients->next = csp; @@ -4369,19 +4485,19 @@ static void listen_loop(void) #undef SELECTED_ONE_OPTION /* end of cpp switch () */ - if (child_id < 0) /* failed */ + if (child_id < 0) { - char buf[BUFFER_SIZE]; - - log_error(LOG_LEVEL_ERROR, "can't fork: %E"); - - snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno); - - write_socket(csp->cfd, buf, strlen(buf)); + /* + * Spawning the child failed, assume it's because + * there are too many children running already. + * XXX: If you assume ... + */ + log_error(LOG_LEVEL_ERROR, + "Unable to take any additional connections: %E"); + write_socket(csp->cfd, TOO_MANY_CONNECTIONS_RESPONSE, + strlen(TOO_MANY_CONNECTIONS_RESPONSE)); close_socket(csp->cfd); csp->flags &= ~CSP_FLAG_ACTIVE; - sleep(5); - continue; } } else