+++ /dev/null
-/* Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "apr.h"
-#include "apr_strings.h"
-
-#define CORE_PRIVATE
-#include "ap_config.h"
-#include "httpd.h"
-#include "http_connection.h"
-#include "http_request.h"
-#include "http_protocol.h"
-#include "ap_mpm.h"
-#include "mpm_default.h"
-#include "http_config.h"
-#include "http_core.h"
-#include "http_vhost.h"
-#include "scoreboard.h"
-#include "http_log.h"
-#include "util_filter.h"
-
-APR_HOOK_STRUCT(
- APR_HOOK_LINK(create_connection)
- APR_HOOK_LINK(process_connection)
- APR_HOOK_LINK(pre_connection)
-)
-AP_IMPLEMENT_HOOK_RUN_FIRST(conn_rec *,create_connection,
- (apr_pool_t *p, server_rec *server, apr_socket_t *csd, long conn_id, void *sbh, apr_bucket_alloc_t *alloc),
- (p, server, csd, conn_id, sbh, alloc), NULL)
-AP_IMPLEMENT_HOOK_RUN_FIRST(int,process_connection,(conn_rec *c),(c),DECLINED)
-AP_IMPLEMENT_HOOK_RUN_ALL(int,pre_connection,(conn_rec *c, void *csd),(c, csd),OK,DECLINED)
-/*
- * More machine-dependent networking gooo... on some systems,
- * you've got to be *really* sure that all the packets are acknowledged
- * before closing the connection, since the client will not be able
- * to see the last response if their TCP buffer is flushed by a RST
- * packet from us, which is what the server's TCP stack will send
- * if it receives any request data after closing the connection.
- *
- * In an ideal world, this function would be accomplished by simply
- * setting the socket option SO_LINGER and handling it within the
- * server's TCP stack while the process continues on to the next request.
- * Unfortunately, it seems that most (if not all) operating systems
- * block the server process on close() when SO_LINGER is used.
- * For those that don't, see USE_SO_LINGER below. For the rest,
- * we have created a home-brew lingering_close.
- *
- * Many operating systems tend to block, puke, or otherwise mishandle
- * calls to shutdown only half of the connection. You should define
- * NO_LINGCLOSE in ap_config.h if such is the case for your system.
- */
-#ifndef MAX_SECS_TO_LINGER
-#define MAX_SECS_TO_LINGER 30
-#endif
-
-AP_CORE_DECLARE(void) ap_flush_conn(conn_rec *c)
-{
- apr_bucket_brigade *bb;
- apr_bucket *b;
-
- bb = apr_brigade_create(c->pool, c->bucket_alloc);
-
- /* FLUSH bucket */
- b = apr_bucket_flush_create(c->bucket_alloc);
- APR_BRIGADE_INSERT_TAIL(bb, b);
-
- /* End Of Connection bucket */
- b = ap_bucket_eoc_create(c->bucket_alloc);
- APR_BRIGADE_INSERT_TAIL(bb, b);
-
- ap_pass_brigade(c->output_filters, bb);
-}
-
-/* we now proceed to read from the client until we get EOF, or until
- * MAX_SECS_TO_LINGER has passed. the reasons for doing this are
- * documented in a draft:
- *
- * http://www.ics.uci.edu/pub/ietf/http/draft-ietf-http-connection-00.txt
- *
- * in a nutshell -- if we don't make this effort we risk causing
- * TCP RST packets to be sent which can tear down a connection before
- * all the response data has been sent to the client.
- */
-#define SECONDS_TO_LINGER 2
-AP_DECLARE(void) ap_lingering_close(conn_rec *c)
-{
- char dummybuf[512];
- apr_size_t nbytes = sizeof(dummybuf);
- apr_status_t rc;
- apr_int32_t timeout;
- apr_int32_t total_linger_time = 0;
- apr_socket_t *csd = ap_get_module_config(c->conn_config, &core_module);
-
- if (!csd) {
- return;
- }
-
- ap_update_child_status(c->sbh, SERVER_CLOSING, NULL);
-
-#ifdef NO_LINGCLOSE
- ap_flush_conn(c); /* just close it */
- apr_socket_close(csd);
- return;
-#endif
-
- /* Close the connection, being careful to send out whatever is still
- * in our buffers. If possible, try to avoid a hard close until the
- * client has ACKed our FIN and/or has stopped sending us data.
- */
-
- /* Send any leftover data to the client, but never try to again */
- ap_flush_conn(c);
-
- if (c->aborted) {
- apr_socket_close(csd);
- return;
- }
-
- /* Shut down the socket for write, which will send a FIN
- * to the peer.
- */
- if (apr_shutdown(csd, APR_SHUTDOWN_WRITE) != APR_SUCCESS
- || c->aborted) {
- apr_socket_close(csd);
- return;
- }
-
- /* Read all data from the peer until we reach "end-of-file" (FIN
- * from peer) or we've exceeded our overall timeout. If the client does
- * not send us bytes within 2 seconds (a value pulled from Apache 1.3
- * which seems to work well), close the connection.
- */
- timeout = apr_time_from_sec(SECONDS_TO_LINGER);
- apr_socket_timeout_set(csd, timeout);
- apr_socket_opt_set(csd, APR_INCOMPLETE_READ, 1);
- while (1) {
- nbytes = sizeof(dummybuf);
- rc = apr_recv(csd, dummybuf, &nbytes);
- if (rc != APR_SUCCESS || nbytes == 0)
- break;
-
- total_linger_time += SECONDS_TO_LINGER;
- if (total_linger_time >= MAX_SECS_TO_LINGER) {
- break;
- }
- }
-
- apr_socket_close(csd);
- return;
-}
-
-AP_CORE_DECLARE(void) ap_process_connection(conn_rec *c, void *csd)
-{
- int rc;
- ap_update_vhost_given_ip(c);
-
- rc = ap_run_pre_connection(c, csd);
- if (rc != OK && rc != DONE) {
- c->aborted = 1;
- }
-
- if (!c->aborted) {
- ap_run_process_connection(c);
- }
-}
-
Code Review / bottlenecks.git / blobdiff