aboutsummaryrefslogtreecommitdiffstats
path: root/trunk/apps/app_zapbarge.c
diff options
context:
space:
mode:
Diffstat (limited to 'trunk/apps/app_zapbarge.c')
-rw-r--r--trunk/apps/app_zapbarge.c299
1 files changed, 299 insertions, 0 deletions
diff --git a/trunk/apps/app_zapbarge.c b/trunk/apps/app_zapbarge.c
new file mode 100644
index 000000000..bb8c4cbb3
--- /dev/null
+++ b/trunk/apps/app_zapbarge.c
@@ -0,0 +1,299 @@
+/*
+ * 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 Zap Barge support
+ *
+ * \author Mark Spencer <markster@digium.com>
+ *
+ * \note Special thanks to comphealth.com for sponsoring this
+ * GPL application.
+ *
+ * \ingroup applications
+ */
+
+/*** MODULEINFO
+ <depend>zaptel</depend>
+ ***/
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include "asterisk/zapata.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"
+
+static char *app = "ZapBarge";
+
+static char *synopsis = "Barge in (monitor) Zap channel";
+
+static char *descrip =
+" ZapBarge([channel]): Barges in on a specified zap\n"
+"channel or prompts if one is not specified. Returns\n"
+"-1 when caller user hangs up and is independent of the\n"
+"state of the channel being monitored.";
+
+
+#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 zt_confinfo ztc;
+ struct ast_frame *f;
+ struct ast_channel *c;
+ struct ast_frame fr;
+ int outfd;
+ int ms;
+ int nfds;
+ int res;
+ int flags;
+ int retryzap;
+ int origfd;
+ int ret = -1;
+
+ ZT_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);
+ retryzap = strcasecmp(chan->tech->type, "Zap");
+zapretry:
+ origfd = chan->fds[0];
+ if (retryzap) {
+ fd = open("/dev/zap/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 = ZT_POLICY_IMMEDIATE;
+ bi.rxbufpolicy = ZT_POLICY_IMMEDIATE;
+ bi.numbufs = 4;
+ if (ioctl(fd, ZT_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(&ztc, 0, sizeof(ztc));
+ /* Check to see if we're in a conference... */
+ ztc.chan = 0;
+ if (ioctl(fd, ZT_GETCONF, &ztc)) {
+ ast_log(LOG_WARNING, "Error getting conference\n");
+ close(fd);
+ goto outrun;
+ }
+ if (ztc.confmode) {
+ /* Whoa, already in a conference... Retry... */
+ if (!retryzap) {
+ ast_debug(1, "Zap channel is in a conference already, retrying with pseudo\n");
+ retryzap = 1;
+ goto zapretry;
+ }
+ }
+ memset(&ztc, 0, sizeof(ztc));
+ /* Add us to the conference */
+ ztc.chan = 0;
+ ztc.confno = confno;
+ ztc.confmode = ZT_CONF_MONITORBOTH;
+
+ if (ioctl(fd, ZT_SETCONF, &ztc)) {
+ ast_log(LOG_WARNING, "Error setting conference\n");
+ close(fd);
+ goto outrun;
+ }
+ ast_debug(1, "Placed channel %s in ZAP 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 (retryzap) {
+ /* Kill old pseudo */
+ close(fd);
+ }
+ ast_debug(1, "Ooh, something swapped out under us, starting over\n");
+ retryzap = 0;
+ goto zapretry;
+ }
+ 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, 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 = 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 */
+ ztc.chan = 0;
+ ztc.confno = 0;
+ ztc.confmode = 0;
+ if (ioctl(fd, ZT_SETCONF, &ztc)) {
+ ast_log(LOG_WARNING, "Error setting conference\n");
+ }
+ }
+
+outrun:
+
+ return ret;
+}
+
+static int conf_exec(struct ast_channel *chan, void *data)
+{
+ int res=-1;
+ int retrycnt = 0;
+ int confflags = 0;
+ int confno = 0;
+ char confstr[80] = "";
+
+ if (!ast_strlen_zero(data)) {
+ if ((sscanf(data, "Zap/%d", &confno) != 1) &&
+ (sscanf(data, "%d", &confno) != 1)) {
+ ast_log(LOG_WARNING, "ZapBarge 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 */
+ confstr[0] = '\0';
+ res = ast_app_getdata(chan, "conf-getchannel",confstr, sizeof(confstr) - 1, 0);
+ if (res <0) goto out;
+ if (sscanf(confstr, "%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(app, conf_exec, synopsis, descrip)) ? AST_MODULE_LOAD_FAILURE : AST_MODULE_LOAD_SUCCESS);
+}
+
+AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Barge in on Zap channel application");