diff options
Diffstat (limited to 'apps/app_dahdibarge.c')
| -rw-r--r-- | apps/app_dahdibarge.c | 358 |
1 files changed, 358 insertions, 0 deletions
diff --git a/apps/app_dahdibarge.c b/apps/app_dahdibarge.c new file mode 100644 index 000000000..cba85a9b6 --- /dev/null +++ b/apps/app_dahdibarge.c @@ -0,0 +1,358 @@ +/* + * 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>dahdi</depend> + ***/ + +#include "asterisk.h" + +ASTERISK_FILE_VERSION(__FILE__, "$Revision$") + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <errno.h> +#include <sys/ioctl.h> + +#include "asterisk/lock.h" +#include "asterisk/file.h" +#include "asterisk/logger.h" +#include "asterisk/channel.h" +#include "asterisk/pbx.h" +#include "asterisk/module.h" +#include "asterisk/config.h" +#include "asterisk/app.h" +#include "asterisk/options.h" +#include "asterisk/cli.h" +#include "asterisk/say.h" +#include "asterisk/utils.h" + +#include "asterisk/dahdi_compat.h" + +static char *dahdi_app = "DAHDIBarge"; +static char *zap_app = "ZapBarge"; + +static char *dahdi_synopsis = "Barge in (monitor) DAHDI channel"; +static char *zap_synopsis = "Barge in (monitor) Zap channel"; + +static char *dahdi_descrip = +" DAHDIBarge([channel]): Barges in on a specified DAHDI\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."; + +static char *zap_descrip = +" ZapBarge([channel]): Barges in on a specified Zaptel\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 dahdi_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; + 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); + retryzap = strcasecmp(chan->tech->type, dahdi_chan_name); +zapretry: + origfd = chan->fds[0]; + if (retryzap) { + fd = open(DAHDI_FILE_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(&ztc, 0, sizeof(ztc)); + /* Check to see if we're in a conference... */ + ztc.chan = 0; + if (ioctl(fd, DAHDI_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_log(LOG_DEBUG, "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 = DAHDI_CONF_MONITORBOTH; + + if (ioctl(fd, DAHDI_SETCONF, &ztc)) { + ast_log(LOG_WARNING, "Error setting conference\n"); + close(fd); + goto outrun; + } + ast_log(LOG_DEBUG, "Placed channel %s in 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_log(LOG_DEBUG, "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, DAHDI_SETCONF, &ztc)) { + ast_log(LOG_WARNING, "Error setting conference\n"); + } + } + +outrun: + + return ret; +} + +static int exec(struct ast_channel *chan, void *data, int dahdimode) +{ + int res=-1; + struct ast_module_user *u; + int retrycnt = 0; + int confflags = 0; + int confno = 0; + char confstr[80] = ""; + + u = ast_module_user_add(chan); + + if (!ast_strlen_zero(data)) { + if (dahdimode) { + if ((sscanf(data, "DAHDI/%d", &confno) != 1) && + (sscanf(data, "%d", &confno) != 1)) { + ast_log(LOG_WARNING, "Argument (if specified) must be a channel number, not '%s'\n", (char *) data); + ast_module_user_remove(u); + return 0; + } + } else { + if ((sscanf(data, "Zap/%d", &confno) != 1) && + (sscanf(data, "%d", &confno) != 1)) { + ast_log(LOG_WARNING, "Argument (if specified) must be a channel number, not '%s'\n", (char *) data); + ast_module_user_remove(u); + 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 */ + ast_module_user_remove(u); + return res; +} + +static int exec_zap(struct ast_channel *chan, void *data) +{ + ast_log(LOG_WARNING, "Use of the command %s is deprecated, please use %s instead.\n", zap_app, dahdi_app); + + return exec(chan, data, 0); +} + +static int exec_dahdi(struct ast_channel *chan, void *data) +{ + return exec(chan, data, 1); +} + +static int unload_module(void) +{ + int res = 0; + + if (*dahdi_chan_mode == CHAN_DAHDI_PLUS_ZAP_MODE) { + res |= ast_unregister_application(dahdi_app); + } + + res |= ast_unregister_application(zap_app); + + ast_module_user_hangup_all(); + + return res; +} + +static int load_module(void) +{ + int res = 0; + + if (*dahdi_chan_mode == CHAN_DAHDI_PLUS_ZAP_MODE) { + res |= ast_register_application(dahdi_app, exec_dahdi, dahdi_synopsis, dahdi_descrip); + } + + res |= ast_register_application(zap_app, exec_zap, zap_synopsis, zap_descrip); + + return res; +} + +AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Barge in on channel application"); |