git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2921 65c4cc65-6c06-0410-ace0-fbb531ad65f3
307 lines
7.1 KiB
C
Executable file
307 lines
7.1 KiB
C
Executable file
/*
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* Asterisk -- A telephony toolkit for Linux.
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*
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* Zap Barge support
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*
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* Copyright (C) 2003, Digium
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*
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* Mark Spencer <markster@digium.com>
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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
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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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#include <asterisk/lock.h>
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#include <asterisk/file.h>
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#include <asterisk/logger.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/options.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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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <pthread.h>
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#include <linux/zaptel.h>
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static char *tdesc = "Barge in on Zap channel application";
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static char *app = "ZapBarge";
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static char *synopsis = "Barge in (monitor) Zap channel";
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static char *descrip =
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" ZapBarge([channel]): Barges in on a specified zap\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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STANDARD_LOCAL_USER;
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LOCAL_USER_DECL;
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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 zt_confinfo ztc;
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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 retryzap;
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int origfd;
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int ret = -1;
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ZT_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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retryzap = strcasecmp(chan->type, "Zap");
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zapretry:
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origfd = chan->fds[0];
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if (retryzap) {
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fd = open("/dev/zap/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 = ZT_POLICY_IMMEDIATE;
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bi.rxbufpolicy = ZT_POLICY_IMMEDIATE;
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bi.numbufs = 4;
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if (ioctl(fd, ZT_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(&ztc, 0, sizeof(ztc));
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/* Check to see if we're in a conference... */
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ztc.chan = 0;
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if (ioctl(fd, ZT_GETCONF, &ztc)) {
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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 (ztc.confmode) {
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/* Whoa, already in a conference... Retry... */
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if (!retryzap) {
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ast_log(LOG_DEBUG, "Zap channel is in a conference already, retrying with pseudo\n");
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retryzap = 1;
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goto zapretry;
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}
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}
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memset(&ztc, 0, sizeof(ztc));
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/* Add us to the conference */
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ztc.chan = 0;
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ztc.confno = confno;
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ztc.confmode = ZT_CONF_MONITORBOTH;
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if (ioctl(fd, ZT_SETCONF, &ztc)) {
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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_log(LOG_DEBUG, "Placed channel %s in ZAP 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 (retryzap) {
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/* Kill old pseudo */
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close(fd);
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}
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ast_log(LOG_DEBUG, "Ooh, something swapped out under us, starting over\n");
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retryzap = 0;
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goto zapretry;
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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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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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ztc.chan = 0;
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ztc.confno = 0;
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ztc.confmode = 0;
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if (ioctl(fd, ZT_SETCONF, &ztc)) {
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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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struct localuser *u;
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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 (data && !ast_strlen_zero(data)) {
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if ((sscanf(data, "Zap/%d", &confno) != 1) &&
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(sscanf(data, "%d", &confno) != 1)) {
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ast_log(LOG_WARNING, "ZapBarge 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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LOCAL_USER_ADD(u);
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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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strcpy(confstr, "");
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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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LOCAL_USER_REMOVE(u);
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return res;
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}
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int unload_module(void)
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{
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STANDARD_HANGUP_LOCALUSERS;
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return ast_unregister_application(app);
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}
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int load_module(void)
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{
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return ast_register_application(app, conf_exec, synopsis, descrip);
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}
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char *description(void)
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{
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return tdesc;
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}
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int usecount(void)
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{
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int res;
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STANDARD_USECOUNT(res);
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return res;
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}
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char *key()
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{
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return ASTERISK_GPL_KEY;
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}
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