mirror of https://github.com/asterisk/asterisk
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
297 lines
6.9 KiB
297 lines
6.9 KiB
/*
|
|
* Asterisk -- A telephony toolkit for Linux.
|
|
*
|
|
* Generic Linux Telephony Interface driver
|
|
*
|
|
* Copyright (C) 1999, Mark Spencer
|
|
*
|
|
* Mark Spencer <markster@linux-support.net>
|
|
*
|
|
* This program is free software, distributed under the terms of
|
|
* the GNU General Public License
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <pthread.h>
|
|
#include <string.h>
|
|
#include <asterisk/lock.h>
|
|
#include <asterisk/channel.h>
|
|
#include <asterisk/channel_pvt.h>
|
|
#include <asterisk/config.h>
|
|
#include <asterisk/logger.h>
|
|
#include <asterisk/module.h>
|
|
#include <asterisk/pbx.h>
|
|
#include <asterisk/options.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/time.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <arpa/inet.h>
|
|
#include <fcntl.h>
|
|
#include <sys/ioctl.h>
|
|
#include <nbs.h>
|
|
|
|
static char *desc = "Network Broadcast Sound Support";
|
|
static char *type = "NBS";
|
|
static char *tdesc = "Network Broadcast Sound Driver";
|
|
|
|
static int usecnt =0;
|
|
|
|
/* Only linear is allowed */
|
|
static int prefformat = AST_FORMAT_SLINEAR;
|
|
|
|
static ast_mutex_t usecnt_lock = AST_MUTEX_INITIALIZER;
|
|
|
|
static char context[AST_MAX_EXTENSION] = "default";
|
|
|
|
/* NBS creates private structures on demand */
|
|
|
|
struct nbs_pvt {
|
|
NBS *nbs;
|
|
struct ast_channel *owner; /* Channel we belong to, possibly NULL */
|
|
char app[16]; /* Our app */
|
|
char stream[80]; /* Our stream */
|
|
struct ast_frame fr; /* "null" frame */
|
|
};
|
|
|
|
static int nbs_call(struct ast_channel *ast, char *dest, int timeout)
|
|
{
|
|
struct nbs_pvt *p;
|
|
|
|
p = ast->pvt->pvt;
|
|
|
|
if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
|
|
ast_log(LOG_WARNING, "nbs_call called on %s, neither down nor reserved\n", ast->name);
|
|
return -1;
|
|
}
|
|
/* When we call, it just works, really, there's no destination... Just
|
|
ring the phone and wait for someone to answer */
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "Calling %s on %s\n", dest, ast->name);
|
|
|
|
/* If we can't connect, return congestion */
|
|
if (nbs_connect(p->nbs)) {
|
|
ast_log(LOG_WARNING, "NBS Connection failed on %s\n", ast->name);
|
|
ast_queue_control(ast, AST_CONTROL_CONGESTION, 0);
|
|
} else {
|
|
ast_setstate(ast, AST_STATE_RINGING);
|
|
ast_queue_control(ast, AST_CONTROL_ANSWER, 0);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void nbs_destroy(struct nbs_pvt *p)
|
|
{
|
|
if (p->nbs)
|
|
nbs_delstream(p->nbs);
|
|
free(p);
|
|
}
|
|
|
|
static struct nbs_pvt *nbs_alloc(void *data)
|
|
{
|
|
struct nbs_pvt *p;
|
|
int flags = 0;
|
|
char stream[256] = "";
|
|
char *opts;
|
|
strncpy(stream, data, sizeof(stream) - 1);
|
|
if ((opts = strchr(stream, ':'))) {
|
|
*opts = '\0';
|
|
opts++;
|
|
} else
|
|
opts = "";
|
|
p = malloc(sizeof(struct nbs_pvt));
|
|
if (p) {
|
|
memset(p, 0, sizeof(struct nbs_pvt));
|
|
if (strlen(opts)) {
|
|
if (strchr(opts, 'm'))
|
|
flags |= NBS_FLAG_MUTE;
|
|
if (strchr(opts, 'o'))
|
|
flags |= NBS_FLAG_OVERSPEAK;
|
|
if (strchr(opts, 'e'))
|
|
flags |= NBS_FLAG_EMERGENCY;
|
|
if (strchr(opts, 'O'))
|
|
flags |= NBS_FLAG_OVERRIDE;
|
|
} else
|
|
flags = NBS_FLAG_OVERSPEAK;
|
|
|
|
strncpy(p->stream, stream, sizeof(p->stream) - 1);
|
|
p->nbs = nbs_newstream("asterisk", stream, flags);
|
|
if (!p->nbs) {
|
|
ast_log(LOG_WARNING, "Unable to allocate new NBS stream '%s' with flags %d\n", stream, flags);
|
|
free(p);
|
|
p = NULL;
|
|
} else {
|
|
/* Set for 8000 hz mono, 640 samples */
|
|
nbs_setbitrate(p->nbs, 8000);
|
|
nbs_setchannels(p->nbs, 1);
|
|
nbs_setblocksize(p->nbs, 640);
|
|
nbs_setblocking(p->nbs, 0);
|
|
}
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static int nbs_hangup(struct ast_channel *ast)
|
|
{
|
|
struct nbs_pvt *p;
|
|
p = ast->pvt->pvt;
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "nbs_hangup(%s)\n", ast->name);
|
|
if (!ast->pvt->pvt) {
|
|
ast_log(LOG_WARNING, "Asked to hangup channel not connected\n");
|
|
return 0;
|
|
}
|
|
nbs_destroy(p);
|
|
ast->pvt->pvt = NULL;
|
|
ast_setstate(ast, AST_STATE_DOWN);
|
|
return 0;
|
|
}
|
|
|
|
static struct ast_frame *nbs_xread(struct ast_channel *ast)
|
|
{
|
|
struct nbs_pvt *p = ast->pvt->pvt;
|
|
|
|
|
|
/* Some nice norms */
|
|
p->fr.datalen = 0;
|
|
p->fr.samples = 0;
|
|
p->fr.data = NULL;
|
|
p->fr.src = type;
|
|
p->fr.offset = 0;
|
|
p->fr.mallocd=0;
|
|
|
|
ast_log(LOG_DEBUG, "Returning null frame on %s\n", ast->name);
|
|
|
|
return &p->fr;
|
|
}
|
|
|
|
static int nbs_xwrite(struct ast_channel *ast, struct ast_frame *frame)
|
|
{
|
|
struct nbs_pvt *p = ast->pvt->pvt;
|
|
/* Write a frame of (presumably voice) data */
|
|
if (frame->frametype != AST_FRAME_VOICE) {
|
|
if (frame->frametype != AST_FRAME_IMAGE)
|
|
ast_log(LOG_WARNING, "Don't know what to do with frame type '%d'\n", frame->frametype);
|
|
return 0;
|
|
}
|
|
if (!(frame->subclass &
|
|
(AST_FORMAT_SLINEAR))) {
|
|
ast_log(LOG_WARNING, "Cannot handle frames in %d format\n", frame->subclass);
|
|
return 0;
|
|
}
|
|
if (ast->_state != AST_STATE_UP) {
|
|
/* Don't try tos end audio on-hook */
|
|
return 0;
|
|
}
|
|
if (nbs_write(p->nbs, frame->data, frame->datalen / 2) < 0)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
static struct ast_channel *nbs_new(struct nbs_pvt *i, int state)
|
|
{
|
|
struct ast_channel *tmp;
|
|
tmp = ast_channel_alloc(1);
|
|
if (tmp) {
|
|
snprintf(tmp->name, sizeof(tmp->name), "NBS/%s", i->stream);
|
|
tmp->type = type;
|
|
tmp->fds[0] = nbs_fd(i->nbs);
|
|
tmp->nativeformats = prefformat;
|
|
tmp->pvt->rawreadformat = prefformat;
|
|
tmp->pvt->rawwriteformat = prefformat;
|
|
tmp->writeformat = prefformat;
|
|
tmp->readformat = prefformat;
|
|
ast_setstate(tmp, state);
|
|
if (state == AST_STATE_RING)
|
|
tmp->rings = 1;
|
|
tmp->pvt->pvt = i;
|
|
tmp->pvt->call = nbs_call;
|
|
tmp->pvt->hangup = nbs_hangup;
|
|
tmp->pvt->read = nbs_xread;
|
|
tmp->pvt->write = nbs_xwrite;
|
|
strncpy(tmp->context, context, sizeof(tmp->context)-1);
|
|
strncpy(tmp->exten, "s", sizeof(tmp->exten) - 1);
|
|
strcpy(tmp->language, "");
|
|
i->owner = tmp;
|
|
ast_mutex_lock(&usecnt_lock);
|
|
usecnt++;
|
|
ast_mutex_unlock(&usecnt_lock);
|
|
ast_update_use_count();
|
|
if (state != AST_STATE_DOWN) {
|
|
if (ast_pbx_start(tmp)) {
|
|
ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
|
|
ast_hangup(tmp);
|
|
}
|
|
}
|
|
} else
|
|
ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
|
|
return tmp;
|
|
}
|
|
|
|
|
|
static struct ast_channel *nbs_request(char *type, int format, void *data)
|
|
{
|
|
int oldformat;
|
|
struct nbs_pvt *p;
|
|
struct ast_channel *tmp = NULL;
|
|
|
|
oldformat = format;
|
|
format &= (AST_FORMAT_SLINEAR);
|
|
if (!format) {
|
|
ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", oldformat);
|
|
return NULL;
|
|
}
|
|
p = nbs_alloc(data);
|
|
if (p) {
|
|
tmp = nbs_new(p, AST_STATE_DOWN);
|
|
if (!tmp)
|
|
nbs_destroy(p);
|
|
}
|
|
return tmp;
|
|
}
|
|
|
|
static int __unload_module(void)
|
|
{
|
|
/* First, take us out of the channel loop */
|
|
ast_channel_unregister(type);
|
|
return 0;
|
|
}
|
|
|
|
int unload_module(void)
|
|
{
|
|
return __unload_module();
|
|
}
|
|
|
|
int load_module()
|
|
{
|
|
/* Make sure we can register our Adtranphone channel type */
|
|
if (ast_channel_register(type, tdesc,
|
|
AST_FORMAT_SLINEAR, nbs_request)) {
|
|
ast_log(LOG_ERROR, "Unable to register channel class %s\n", type);
|
|
__unload_module();
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int usecount()
|
|
{
|
|
int res;
|
|
ast_mutex_lock(&usecnt_lock);
|
|
res = usecnt;
|
|
ast_mutex_unlock(&usecnt_lock);
|
|
return res;
|
|
}
|
|
|
|
char *description()
|
|
{
|
|
return desc;
|
|
}
|
|
|
|
char *key()
|
|
{
|
|
return ASTERISK_GPL_KEY;
|
|
}
|