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/* 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 "ajp.h"
APLOG_USE_MODULE(proxy_ajp);
/*
* Handle the CPING/CPONG
*/
apr_status_t ajp_handle_cping_cpong(apr_socket_t *sock,
request_rec *r,
apr_interval_time_t timeout)
{
ajp_msg_t *msg;
apr_status_t rc, rv;
apr_interval_time_t org;
apr_byte_t result;
ap_log_rerror(APLOG_MARK, APLOG_TRACE8, 0, r,
"Into ajp_handle_cping_cpong");
rc = ajp_msg_create(r->pool, AJP_PING_PONG_SZ, &msg);
if (rc != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01007)
"ajp_handle_cping_cpong: ajp_msg_create failed");
return rc;
}
rc = ajp_msg_serialize_cping(msg);
if (rc != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01008)
"ajp_handle_cping_cpong: ajp_marshal_into_msgb failed");
return rc;
}
rc = ajp_ilink_send(sock, msg);
ajp_msg_log(r, msg, "ajp_handle_cping_cpong: ajp_ilink_send packet dump");
if (rc != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01009)
"ajp_handle_cping_cpong: ajp_ilink_send failed");
return rc;
}
rc = apr_socket_timeout_get(sock, &org);
if (rc != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01010)
"ajp_handle_cping_cpong: apr_socket_timeout_get failed");
return rc;
}
/* Set CPING/CPONG response timeout */
rc = apr_socket_timeout_set(sock, timeout);
if (rc != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01011)
"ajp_handle_cping_cpong: apr_socket_timeout_set failed");
return rc;
}
ajp_msg_reuse(msg);
/* Read CPONG reply */
rv = ajp_ilink_receive(sock, msg);
if (rv != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01012)
"ajp_handle_cping_cpong: ajp_ilink_receive failed");
goto cleanup;
}
ajp_msg_log(r, msg, "ajp_handle_cping_cpong: ajp_ilink_receive packet dump");
rv = ajp_msg_get_uint8(msg, &result);
if (rv != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01013)
"ajp_handle_cping_cpong: invalid CPONG message");
goto cleanup;
}
if (result != CMD_AJP13_CPONG) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01014)
"ajp_handle_cping_cpong: awaited CPONG, received %d ",
result);
rv = APR_EGENERAL;
goto cleanup;
}
cleanup:
/* Restore original socket timeout */
rc = apr_socket_timeout_set(sock, org);
if (rc != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01015)
"ajp_handle_cping_cpong: apr_socket_timeout_set failed");
return rc;
}
ap_log_rerror(APLOG_MARK, APLOG_TRACE8, 0, r,
"ajp_handle_cping_cpong: Done");
return rv;
}
#define case_to_str(x) case CMD_AJP13_##x:\
return #x;\
break;
/**
* Convert numeric message type into string
* @param type AJP message type
* @return AJP message type as a string
*/
const char *ajp_type_str(int type)
{
switch (type) {
case_to_str(FORWARD_REQUEST)
case_to_str(SEND_BODY_CHUNK)
case_to_str(SEND_HEADERS)
case_to_str(END_RESPONSE)
case_to_str(GET_BODY_CHUNK)
case_to_str(SHUTDOWN)
case_to_str(PING)
case_to_str(CPONG)
case_to_str(CPING)
default:
return "CMD_AJP13_UNKNOWN";
}
}