mirror of https://github.com/asterisk/asterisk
git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.0@126362 65c4cc65-6c06-0410-ace0-fbb531ad65f31.6.0
Kevin P. Fleming
17 years ago
parent
1a797f47ea
commit
b148e15762
@ -0,0 +1,308 @@
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/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* Special thanks to comphealth.com for sponsoring this
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* GPL application.
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief DAHDI Barge support
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*
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* \author Mark Spencer <markster@digium.com>
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*
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* \note Special thanks to comphealth.com for sponsoring this
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* GPL application.
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*
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* \ingroup applications
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*/
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/*** MODULEINFO
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<depend>dahdi</depend>
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***/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include <sys/ioctl.h>
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#include <dahdi/user.h>
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#include "asterisk/lock.h"
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#include "asterisk/file.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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#include "asterisk/config.h"
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#include "asterisk/app.h"
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#include "asterisk/cli.h"
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#include "asterisk/say.h"
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#include "asterisk/utils.h"
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static char *app = "DAHDIBarge";
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static char *deprecated_app = "ZapBarge";
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static char *synopsis = "Barge in (monitor) DAHDI channel";
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static char *descrip =
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" DAHDIBarge([channel]): Barges in on a specified DAHDI\n"
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"channel or prompts if one is not specified. Returns\n"
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"-1 when caller user hangs up and is independent of the\n"
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"state of the channel being monitored.";
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#define CONF_SIZE 160
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static int careful_write(int fd, unsigned char *data, int len)
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{
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int res;
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while(len) {
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res = write(fd, data, len);
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if (res < 1) {
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if (errno != EAGAIN) {
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ast_log(LOG_WARNING, "Failed to write audio data to conference: %s\n", strerror(errno));
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return -1;
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} else
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return 0;
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}
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len -= res;
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data += res;
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}
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return 0;
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}
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static int conf_run(struct ast_channel *chan, int confno, int confflags)
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{
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int fd;
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struct dahdi_confinfo dahdic;
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struct ast_frame *f;
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struct ast_channel *c;
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struct ast_frame fr;
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int outfd;
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int ms;
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int nfds;
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int res;
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int flags;
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int retrydahdi;
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int origfd;
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int ret = -1;
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DAHDI_BUFFERINFO bi;
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char __buf[CONF_SIZE + AST_FRIENDLY_OFFSET];
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char *buf = __buf + AST_FRIENDLY_OFFSET;
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/* Set it into U-law mode (write) */
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if (ast_set_write_format(chan, AST_FORMAT_ULAW) < 0) {
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ast_log(LOG_WARNING, "Unable to set '%s' to write ulaw mode\n", chan->name);
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goto outrun;
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}
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/* Set it into U-law mode (read) */
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if (ast_set_read_format(chan, AST_FORMAT_ULAW) < 0) {
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ast_log(LOG_WARNING, "Unable to set '%s' to read ulaw mode\n", chan->name);
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goto outrun;
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}
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ast_indicate(chan, -1);
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retrydahdi = strcasecmp(chan->tech->type, "DAHDI");
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dahdiretry:
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origfd = chan->fds[0];
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if (retrydahdi) {
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fd = open("/dev/dahdi/pseudo", O_RDWR);
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if (fd < 0) {
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ast_log(LOG_WARNING, "Unable to open pseudo channel: %s\n", strerror(errno));
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goto outrun;
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}
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/* Make non-blocking */
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flags = fcntl(fd, F_GETFL);
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if (flags < 0) {
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ast_log(LOG_WARNING, "Unable to get flags: %s\n", strerror(errno));
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close(fd);
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goto outrun;
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}
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if (fcntl(fd, F_SETFL, flags | O_NONBLOCK)) {
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ast_log(LOG_WARNING, "Unable to set flags: %s\n", strerror(errno));
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close(fd);
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goto outrun;
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}
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/* Setup buffering information */
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memset(&bi, 0, sizeof(bi));
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bi.bufsize = CONF_SIZE;
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bi.txbufpolicy = DAHDI_POLICY_IMMEDIATE;
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bi.rxbufpolicy = DAHDI_POLICY_IMMEDIATE;
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bi.numbufs = 4;
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if (ioctl(fd, DAHDI_SET_BUFINFO, &bi)) {
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ast_log(LOG_WARNING, "Unable to set buffering information: %s\n", strerror(errno));
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close(fd);
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goto outrun;
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}
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nfds = 1;
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} else {
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/* XXX Make sure we're not running on a pseudo channel XXX */
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fd = chan->fds[0];
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nfds = 0;
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}
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memset(&dahdic, 0, sizeof(dahdic));
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/* Check to see if we're in a conference... */
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dahdic.chan = 0;
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if (ioctl(fd, DAHDI_GETCONF, &dahdic)) {
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ast_log(LOG_WARNING, "Error getting conference\n");
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close(fd);
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goto outrun;
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}
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if (dahdic.confmode) {
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/* Whoa, already in a conference... Retry... */
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if (!retrydahdi) {
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ast_debug(1, "DAHDI channel is in a conference already, retrying with pseudo\n");
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retrydahdi = 1;
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goto dahdiretry;
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}
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}
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memset(&dahdic, 0, sizeof(dahdic));
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/* Add us to the conference */
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dahdic.chan = 0;
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dahdic.confno = confno;
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dahdic.confmode = DAHDI_CONF_MONITORBOTH;
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if (ioctl(fd, DAHDI_SETCONF, &dahdic)) {
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ast_log(LOG_WARNING, "Error setting conference\n");
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close(fd);
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goto outrun;
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}
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ast_debug(1, "Placed channel %s in DAHDI channel %d monitor\n", chan->name, confno);
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for(;;) {
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outfd = -1;
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ms = -1;
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c = ast_waitfor_nandfds(&chan, 1, &fd, nfds, NULL, &outfd, &ms);
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if (c) {
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if (c->fds[0] != origfd) {
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if (retrydahdi) {
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/* Kill old pseudo */
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close(fd);
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}
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ast_debug(1, "Ooh, something swapped out under us, starting over\n");
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retrydahdi = 0;
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goto dahdiretry;
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}
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f = ast_read(c);
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if (!f)
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break;
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if ((f->frametype == AST_FRAME_DTMF) && (f->subclass == '#')) {
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ret = 0;
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ast_frfree(f);
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break;
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} else if (fd != chan->fds[0]) {
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if (f->frametype == AST_FRAME_VOICE) {
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if (f->subclass == AST_FORMAT_ULAW) {
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/* Carefully write */
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careful_write(fd, f->data, f->datalen);
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} else
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ast_log(LOG_WARNING, "Huh? Got a non-ulaw (%d) frame in the conference\n", f->subclass);
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}
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}
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ast_frfree(f);
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} else if (outfd > -1) {
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res = read(outfd, buf, CONF_SIZE);
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if (res > 0) {
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memset(&fr, 0, sizeof(fr));
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fr.frametype = AST_FRAME_VOICE;
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fr.subclass = AST_FORMAT_ULAW;
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fr.datalen = res;
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fr.samples = res;
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fr.data = buf;
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fr.offset = AST_FRIENDLY_OFFSET;
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if (ast_write(chan, &fr) < 0) {
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ast_log(LOG_WARNING, "Unable to write frame to channel: %s\n", strerror(errno));
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/* break; */
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}
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} else
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ast_log(LOG_WARNING, "Failed to read frame: %s\n", strerror(errno));
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}
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}
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if (fd != chan->fds[0])
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close(fd);
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else {
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/* Take out of conference */
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/* Add us to the conference */
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dahdic.chan = 0;
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dahdic.confno = 0;
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dahdic.confmode = 0;
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if (ioctl(fd, DAHDI_SETCONF, &dahdic)) {
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ast_log(LOG_WARNING, "Error setting conference\n");
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}
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}
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outrun:
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return ret;
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}
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static int conf_exec(struct ast_channel *chan, void *data)
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{
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int res=-1;
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int retrycnt = 0;
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int confflags = 0;
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int confno = 0;
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char confstr[80] = "";
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if (!ast_strlen_zero(data)) {
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if ((sscanf(data, "DAHDI/%d", &confno) != 1) &&
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(sscanf(data, "%d", &confno) != 1)) {
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ast_log(LOG_WARNING, "DAHDIBarge Argument (if specified) must be a channel number, not '%s'\n", (char *)data);
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return 0;
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}
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}
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if (chan->_state != AST_STATE_UP)
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ast_answer(chan);
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while(!confno && (++retrycnt < 4)) {
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/* Prompt user for conference number */
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confstr[0] = '\0';
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res = ast_app_getdata(chan, "conf-getchannel",confstr, sizeof(confstr) - 1, 0);
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if (res <0) goto out;
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if (sscanf(confstr, "%d", &confno) != 1)
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confno = 0;
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}
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if (confno) {
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/* XXX Should prompt user for pin if pin is required XXX */
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/* Run the conference */
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res = conf_run(chan, confno, confflags);
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}
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out:
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/* Do the conference */
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return res;
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}
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static int conf_exec_warn(struct ast_channel *chan, void *data)
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{
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ast_log(LOG_WARNING, "Use of the command %s is deprecated, please use %s instead.\n", deprecated_app, app);
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return conf_exec(chan, data);
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}
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static int unload_module(void)
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{
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return ast_unregister_application(app);
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}
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static int load_module(void)
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{
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ast_register_application(deprecated_app, conf_exec_warn, synopsis, descrip);
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return ((ast_register_application(app, conf_exec, synopsis, descrip)) ? AST_MODULE_LOAD_FAILURE : AST_MODULE_LOAD_SUCCESS);
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Barge in on DAHDI channel application");
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