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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 "ap_config.h"
#include "ap_mmn.h"
#include "httpd.h"
#include "http_config.h"
#include "http_connection.h"
#include "apr_buckets.h"
#include "util_filter.h"
module AP_MODULE_DECLARE_DATA echo_module;
typedef struct {
int bEnabled;
} EchoConfig;
static void *create_echo_server_config(apr_pool_t *p, server_rec *s)
{
EchoConfig *pConfig = apr_pcalloc(p, sizeof *pConfig);
pConfig->bEnabled = 0;
return pConfig;
}
static const char *echo_on(cmd_parms *cmd, void *dummy, int arg)
{
EchoConfig *pConfig = ap_get_module_config(cmd->server->module_config,
&echo_module);
pConfig->bEnabled = arg;
return NULL;
}
static int process_echo_connection(conn_rec *c)
{
apr_bucket_brigade *bb;
apr_bucket *b;
apr_status_t rv;
EchoConfig *pConfig = ap_get_module_config(c->base_server->module_config,
&echo_module);
if (!pConfig->bEnabled) {
return DECLINED;
}
bb = apr_brigade_create(c->pool, c->bucket_alloc);
for ( ; ; ) {
/* Get a single line of input from the client */
if ((rv = ap_get_brigade(c->input_filters, bb, AP_MODE_GETLINE,
APR_BLOCK_READ, 0) != APR_SUCCESS ||
APR_BRIGADE_EMPTY(bb))) {
apr_brigade_destroy(bb);
break;
}
/* Make sure the data is flushed to the client */
b = apr_bucket_flush_create(c->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(bb, b);
ap_pass_brigade(c->output_filters, bb);
}
return OK;
}
static const command_rec echo_cmds[] =
{
AP_INIT_FLAG("ProtocolEcho", echo_on, NULL, RSRC_CONF,
"Run an echo server on this host"),
{ NULL }
};
static void register_hooks(apr_pool_t *p)
{
ap_hook_process_connection(process_echo_connection, NULL, NULL,
APR_HOOK_MIDDLE);
}
module AP_MODULE_DECLARE_DATA echo_module = {
STANDARD20_MODULE_STUFF,
NULL, /* create per-directory config structure */
NULL, /* merge per-directory config structures */
create_echo_server_config, /* create per-server config structure */
NULL, /* merge per-server config structures */
echo_cmds, /* command apr_table_t */
register_hooks /* register hooks */
};
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