git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@199479 65c4cc65-6c06-0410-ace0-fbb531ad65f3
309 lines
7.7 KiB
C
309 lines
7.7 KiB
C
/*
|
|
* Asterisk -- An open source telephony toolkit.
|
|
*
|
|
* Copyright (C) 1999 - 2005, Digium, Inc.
|
|
*
|
|
* Mark Spencer <markster@digium.com>
|
|
*
|
|
* Special thanks to comphealth.com for sponsoring this
|
|
* GPL application.
|
|
*
|
|
* 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
|
|
*
|
|
* \brief DAHDI Barge support
|
|
*
|
|
* \author Mark Spencer <markster@digium.com>
|
|
*
|
|
* \note Special thanks to comphealth.com for sponsoring this
|
|
* GPL application.
|
|
*
|
|
* \ingroup applications
|
|
*/
|
|
|
|
/*** MODULEINFO
|
|
<depend>dahdi</depend>
|
|
***/
|
|
|
|
#include "asterisk.h"
|
|
|
|
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
|
|
|
|
#include <dahdi/user.h>
|
|
|
|
#include "asterisk/lock.h"
|
|
#include "asterisk/file.h"
|
|
#include "asterisk/channel.h"
|
|
#include "asterisk/pbx.h"
|
|
#include "asterisk/module.h"
|
|
#include "asterisk/config.h"
|
|
#include "asterisk/app.h"
|
|
#include "asterisk/cli.h"
|
|
#include "asterisk/say.h"
|
|
#include "asterisk/utils.h"
|
|
|
|
/*** DOCUMENTATION
|
|
<application name="DAHDIBarge" language="en_US">
|
|
<synopsis>
|
|
Barge in (monitor) DAHDI channel.
|
|
</synopsis>
|
|
<syntax>
|
|
<parameter name="channel">
|
|
<para>Channel to barge.</para>
|
|
</parameter>
|
|
</syntax>
|
|
<description>
|
|
<para>Barges in on a specified DAHDI <replaceable>channel</replaceable> or prompts
|
|
if one is not specified. Returns <literal>-1</literal> when caller user hangs
|
|
up and is independent of the state of the channel being monitored.
|
|
</para>
|
|
</description>
|
|
</application>
|
|
***/
|
|
static const char app[] = "DAHDIBarge";
|
|
|
|
#define CONF_SIZE 160
|
|
|
|
static int careful_write(int fd, unsigned char *data, int len)
|
|
{
|
|
int res;
|
|
while(len) {
|
|
res = write(fd, data, len);
|
|
if (res < 1) {
|
|
if (errno != EAGAIN) {
|
|
ast_log(LOG_WARNING, "Failed to write audio data to conference: %s\n", strerror(errno));
|
|
return -1;
|
|
} else
|
|
return 0;
|
|
}
|
|
len -= res;
|
|
data += res;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int conf_run(struct ast_channel *chan, int confno, int confflags)
|
|
{
|
|
int fd;
|
|
struct dahdi_confinfo dahdic;
|
|
struct ast_frame *f;
|
|
struct ast_channel *c;
|
|
struct ast_frame fr;
|
|
int outfd;
|
|
int ms;
|
|
int nfds;
|
|
int res;
|
|
int flags;
|
|
int retrydahdi;
|
|
int origfd;
|
|
int ret = -1;
|
|
|
|
struct dahdi_bufferinfo bi;
|
|
char __buf[CONF_SIZE + AST_FRIENDLY_OFFSET];
|
|
char *buf = __buf + AST_FRIENDLY_OFFSET;
|
|
|
|
/* Set it into U-law mode (write) */
|
|
if (ast_set_write_format(chan, AST_FORMAT_ULAW) < 0) {
|
|
ast_log(LOG_WARNING, "Unable to set '%s' to write ulaw mode\n", chan->name);
|
|
goto outrun;
|
|
}
|
|
|
|
/* Set it into U-law mode (read) */
|
|
if (ast_set_read_format(chan, AST_FORMAT_ULAW) < 0) {
|
|
ast_log(LOG_WARNING, "Unable to set '%s' to read ulaw mode\n", chan->name);
|
|
goto outrun;
|
|
}
|
|
ast_indicate(chan, -1);
|
|
retrydahdi = strcasecmp(chan->tech->type, "DAHDI");
|
|
dahdiretry:
|
|
origfd = chan->fds[0];
|
|
if (retrydahdi) {
|
|
fd = open("/dev/dahdi/pseudo", O_RDWR);
|
|
if (fd < 0) {
|
|
ast_log(LOG_WARNING, "Unable to open pseudo channel: %s\n", strerror(errno));
|
|
goto outrun;
|
|
}
|
|
/* Make non-blocking */
|
|
flags = fcntl(fd, F_GETFL);
|
|
if (flags < 0) {
|
|
ast_log(LOG_WARNING, "Unable to get flags: %s\n", strerror(errno));
|
|
close(fd);
|
|
goto outrun;
|
|
}
|
|
if (fcntl(fd, F_SETFL, flags | O_NONBLOCK)) {
|
|
ast_log(LOG_WARNING, "Unable to set flags: %s\n", strerror(errno));
|
|
close(fd);
|
|
goto outrun;
|
|
}
|
|
/* Setup buffering information */
|
|
memset(&bi, 0, sizeof(bi));
|
|
bi.bufsize = CONF_SIZE;
|
|
bi.txbufpolicy = DAHDI_POLICY_IMMEDIATE;
|
|
bi.rxbufpolicy = DAHDI_POLICY_IMMEDIATE;
|
|
bi.numbufs = 4;
|
|
if (ioctl(fd, DAHDI_SET_BUFINFO, &bi)) {
|
|
ast_log(LOG_WARNING, "Unable to set buffering information: %s\n", strerror(errno));
|
|
close(fd);
|
|
goto outrun;
|
|
}
|
|
nfds = 1;
|
|
} else {
|
|
/* XXX Make sure we're not running on a pseudo channel XXX */
|
|
fd = chan->fds[0];
|
|
nfds = 0;
|
|
}
|
|
memset(&dahdic, 0, sizeof(dahdic));
|
|
/* Check to see if we're in a conference... */
|
|
dahdic.chan = 0;
|
|
if (ioctl(fd, DAHDI_GETCONF, &dahdic)) {
|
|
ast_log(LOG_WARNING, "Error getting conference\n");
|
|
close(fd);
|
|
goto outrun;
|
|
}
|
|
if (dahdic.confmode) {
|
|
/* Whoa, already in a conference... Retry... */
|
|
if (!retrydahdi) {
|
|
ast_debug(1, "DAHDI channel is in a conference already, retrying with pseudo\n");
|
|
retrydahdi = 1;
|
|
goto dahdiretry;
|
|
}
|
|
}
|
|
memset(&dahdic, 0, sizeof(dahdic));
|
|
/* Add us to the conference */
|
|
dahdic.chan = 0;
|
|
dahdic.confno = confno;
|
|
dahdic.confmode = DAHDI_CONF_MONITORBOTH;
|
|
|
|
if (ioctl(fd, DAHDI_SETCONF, &dahdic)) {
|
|
ast_log(LOG_WARNING, "Error setting conference\n");
|
|
close(fd);
|
|
goto outrun;
|
|
}
|
|
ast_debug(1, "Placed channel %s in DAHDI channel %d monitor\n", chan->name, confno);
|
|
|
|
for(;;) {
|
|
outfd = -1;
|
|
ms = -1;
|
|
c = ast_waitfor_nandfds(&chan, 1, &fd, nfds, NULL, &outfd, &ms);
|
|
if (c) {
|
|
if (c->fds[0] != origfd) {
|
|
if (retrydahdi) {
|
|
/* Kill old pseudo */
|
|
close(fd);
|
|
}
|
|
ast_debug(1, "Ooh, something swapped out under us, starting over\n");
|
|
retrydahdi = 0;
|
|
goto dahdiretry;
|
|
}
|
|
f = ast_read(c);
|
|
if (!f)
|
|
break;
|
|
if ((f->frametype == AST_FRAME_DTMF) && (f->subclass == '#')) {
|
|
ret = 0;
|
|
ast_frfree(f);
|
|
break;
|
|
} else if (fd != chan->fds[0]) {
|
|
if (f->frametype == AST_FRAME_VOICE) {
|
|
if (f->subclass == AST_FORMAT_ULAW) {
|
|
/* Carefully write */
|
|
careful_write(fd, f->data.ptr, f->datalen);
|
|
} else
|
|
ast_log(LOG_WARNING, "Huh? Got a non-ulaw (%d) frame in the conference\n", f->subclass);
|
|
}
|
|
}
|
|
ast_frfree(f);
|
|
} else if (outfd > -1) {
|
|
res = read(outfd, buf, CONF_SIZE);
|
|
if (res > 0) {
|
|
memset(&fr, 0, sizeof(fr));
|
|
fr.frametype = AST_FRAME_VOICE;
|
|
fr.subclass = AST_FORMAT_ULAW;
|
|
fr.datalen = res;
|
|
fr.samples = res;
|
|
fr.data.ptr = buf;
|
|
fr.offset = AST_FRIENDLY_OFFSET;
|
|
if (ast_write(chan, &fr) < 0) {
|
|
ast_log(LOG_WARNING, "Unable to write frame to channel: %s\n", strerror(errno));
|
|
/* break; */
|
|
}
|
|
} else
|
|
ast_log(LOG_WARNING, "Failed to read frame: %s\n", strerror(errno));
|
|
}
|
|
}
|
|
if (fd != chan->fds[0])
|
|
close(fd);
|
|
else {
|
|
/* Take out of conference */
|
|
/* Add us to the conference */
|
|
dahdic.chan = 0;
|
|
dahdic.confno = 0;
|
|
dahdic.confmode = 0;
|
|
if (ioctl(fd, DAHDI_SETCONF, &dahdic)) {
|
|
ast_log(LOG_WARNING, "Error setting conference\n");
|
|
}
|
|
}
|
|
|
|
outrun:
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int conf_exec(struct ast_channel *chan, const char *data)
|
|
{
|
|
int res = -1;
|
|
int retrycnt = 0;
|
|
int confflags = 0;
|
|
int confno = 0;
|
|
char confnostr[80] = "";
|
|
|
|
if (!ast_strlen_zero(data)) {
|
|
if ((sscanf(data, "DAHDI/%d", &confno) != 1) &&
|
|
(sscanf(data, "%d", &confno) != 1)) {
|
|
ast_log(LOG_WARNING, "DAHDIBarge Argument (if specified) must be a channel number, not '%s'\n", (char *)data);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (chan->_state != AST_STATE_UP)
|
|
ast_answer(chan);
|
|
|
|
while(!confno && (++retrycnt < 4)) {
|
|
/* Prompt user for conference number */
|
|
confnostr[0] = '\0';
|
|
res = ast_app_getdata(chan, "conf-getchannel",confnostr, sizeof(confnostr) - 1, 0);
|
|
if (res <0) goto out;
|
|
if (sscanf(confnostr, "%d", &confno) != 1)
|
|
confno = 0;
|
|
}
|
|
if (confno) {
|
|
/* XXX Should prompt user for pin if pin is required XXX */
|
|
/* Run the conference */
|
|
res = conf_run(chan, confno, confflags);
|
|
}
|
|
out:
|
|
/* Do the conference */
|
|
return res;
|
|
}
|
|
|
|
static int unload_module(void)
|
|
{
|
|
return ast_unregister_application(app);
|
|
}
|
|
|
|
static int load_module(void)
|
|
{
|
|
return ((ast_register_application_xml(app, conf_exec)) ? AST_MODULE_LOAD_FAILURE : AST_MODULE_LOAD_SUCCESS);
|
|
}
|
|
|
|
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Barge in on DAHDI channel application");
|