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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2007 - 2008, Digium, Inc.
*
* Russell Bryant <russell@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*!
* \file
* \author Russell Bryant <russell@digium.com>
*
* \brief Usage of the SAForum AIS (Application Interface Specification)
*
* \arg http://www.openais.org/
*
* This file contains the common code between the uses of the different AIS
* services.
*
* \note This module is still considered experimental, as it exposes the
* internal binary format of events between Asterisk servers over a network.
* However, this format is still subject to change between 1.6.X releases.
*/
/*** MODULEINFO
<depend>ais</depend>
***/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$");
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <pthread.h>
#include "ais/ais.h"
#include "asterisk/module.h"
#include "asterisk/options.h"
#include "asterisk/logger.h"
#include "asterisk/channel.h"
#include "asterisk/utils.h"
#include "asterisk/cli.h"
static struct {
pthread_t id;
unsigned int stop:1;
} dispatch_thread = {
.id = AST_PTHREADT_NULL,
};
SaVersionT ais_version = { 'B', 1, 1 };
static const struct ais_error {
SaAisErrorT error;
const char *desc;
} ais_errors[] = {
{ SA_AIS_OK, "OK" },
{ SA_AIS_ERR_LIBRARY, "Library Error" },
{ SA_AIS_ERR_VERSION, "Version Not Compatible" },
{ SA_AIS_ERR_INIT, "Callback Not Registered" },
{ SA_AIS_ERR_TIMEOUT, "Timeout" },
{ SA_AIS_ERR_TRY_AGAIN , "Try Again" },
{ SA_AIS_ERR_INVALID_PARAM, "Invalid Parameter" },
{ SA_AIS_ERR_NO_MEMORY, "No Memory" },
{ SA_AIS_ERR_BAD_HANDLE, "Invalid Handle" },
{ SA_AIS_ERR_BUSY, "Resource Already In Use" },
{ SA_AIS_ERR_ACCESS, "Access Denied" },
{ SA_AIS_ERR_NOT_EXIST, "Does Not Exist" },
{ SA_AIS_ERR_NAME_TOO_LONG, "Name Too Long" },
{ SA_AIS_ERR_EXIST, "Already Exists" },
{ SA_AIS_ERR_NO_SPACE, "Buffer Too Small" },
{ SA_AIS_ERR_INTERRUPT, "Request Interrupted" },
{ SA_AIS_ERR_NAME_NOT_FOUND, "Name Not Found" },
{ SA_AIS_ERR_NO_RESOURCES, "Not Enough Resources" },
{ SA_AIS_ERR_NOT_SUPPORTED, "Requested Function Not Supported" },
{ SA_AIS_ERR_BAD_OPERATION, "Operation Not Allowed" },
{ SA_AIS_ERR_FAILED_OPERATION, "Operation Failed" },
{ SA_AIS_ERR_MESSAGE_ERROR, "Communication Error" },
{ SA_AIS_ERR_QUEUE_FULL, "Destination Queue Full" },
{ SA_AIS_ERR_QUEUE_NOT_AVAILABLE, "Destination Queue Not Available" },
{ SA_AIS_ERR_BAD_FLAGS, "Invalid Flags" },
{ SA_AIS_ERR_TOO_BIG, "Value Too Large" },
{ SA_AIS_ERR_NO_SECTIONS, "No More Sections to Initialize" },
};
const char *ais_err2str(SaAisErrorT error)
{
int x;
for (x = 0; x < ARRAY_LEN(ais_errors); x++) {
if (ais_errors[x].error == error)
return ais_errors[x].desc;
}
return "Unknown";
}
static void *dispatch_thread_handler(void *data)
{
SaSelectionObjectT clm_fd, evt_fd, max_fd;
int res;
fd_set read_fds;
SaAisErrorT ais_res;
ais_res = saClmSelectionObjectGet(clm_handle, &clm_fd);
if (ais_res != SA_AIS_OK) {
ast_log(LOG_ERROR, "Failed to retrieve select fd for CLM service. "
"This module will not operate.\n");
return NULL;
}
ais_res = saEvtSelectionObjectGet(evt_handle, &evt_fd);
if (ais_res != SA_AIS_OK) {
ast_log(LOG_ERROR, "Failed to retrieve select fd for EVT service. "
"This module will not operate.\n");
return NULL;
}
max_fd = clm_fd > evt_fd ? clm_fd : evt_fd;
while (!dispatch_thread.stop) {
FD_ZERO(&read_fds);
FD_SET(clm_fd, &read_fds);
FD_SET(evt_fd, &read_fds);
res = ast_select(max_fd + 1, &read_fds, NULL, NULL, NULL);
if (res == -1 && errno != EINTR && errno != EAGAIN) {
ast_log(LOG_ERROR, "Select error (%s) dispatch thread going away now, "
"and the module will no longer operate.\n", strerror(errno));
break;
}
if (FD_ISSET(clm_fd, &read_fds))
saClmDispatch(clm_handle, SA_DISPATCH_ALL);
if (FD_ISSET(evt_fd, &read_fds))
saEvtDispatch(evt_handle, SA_DISPATCH_ALL);
}
return NULL;
}
static int load_module(void)
{
if (ast_ais_clm_load_module())
goto return_error;
if (ast_ais_evt_load_module())
goto evt_failed;
if (ast_pthread_create_background(&dispatch_thread.id, NULL,
dispatch_thread_handler, NULL)) {
ast_log(LOG_ERROR, "Error starting AIS dispatch thread.\n");
goto dispatch_failed;
}
return AST_MODULE_LOAD_SUCCESS;
dispatch_failed:
ast_ais_evt_unload_module();
evt_failed:
ast_ais_clm_unload_module();
return_error:
return AST_MODULE_LOAD_DECLINE;
}
static int unload_module(void)
{
ast_ais_clm_unload_module();
ast_ais_evt_unload_module();
if (dispatch_thread.id != AST_PTHREADT_NULL) {
dispatch_thread.stop = 1;
pthread_kill(dispatch_thread.id, SIGURG); /* poke! */
pthread_join(dispatch_thread.id, NULL);
}
return 0;
}
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "SAForum AIS");
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