+++ /dev/null
-/*
- * Asterisk -- An open source telephony toolkit.
- *
- * Copyright (C) 1999 - 2005, Digium, Inc.
- *
- * Mark Spencer <markster@digium.com>
- *
- * 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 Execute an ISDN RAS
- *
- * \author Mark Spencer <markster@digium.com>
- *
- * \ingroup applications
- */
-
-/*** MODULEINFO
- <depend>dahdi</depend>
- <support_level>deprecated</support_level>
- <deprecated_in>16</deprecated_in>
- <removed_in>19</removed_in>
- ***/
-
-#include "asterisk.h"
-
-#include <sys/ioctl.h>
-#include <sys/wait.h>
-#include <signal.h>
-#include <fcntl.h>
-
-#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/app.h"
-
-/*** DOCUMENTATION
- <application name="DAHDIRAS" language="en_US">
- <synopsis>
- Executes DAHDI ISDN RAS application.
- </synopsis>
- <syntax>
- <parameter name="args" required="true">
- <para>A list of parameters to pass to the pppd daemon,
- separated by <literal>,</literal> characters.</para>
- </parameter>
- </syntax>
- <description>
- <para>Executes a RAS server using pppd on the given channel.
- The channel must be a clear channel (i.e. PRI source) and a DAHDI
- channel to be able to use this function (No modem emulation is included).</para>
- <para>Your pppd must be patched to be DAHDI aware.</para>
- </description>
- </application>
-
- ***/
-
-static const char app[] = "DAHDIRAS";
-
-#define PPP_MAX_ARGS 32
-#define PPP_EXEC "/usr/sbin/pppd"
-
-static pid_t spawn_ras(struct ast_channel *chan, char *args)
-{
- pid_t pid;
- char *c;
-
- char *argv[PPP_MAX_ARGS];
- int argc = 0;
- char *stringp=NULL;
-
- /* Start by forking */
- pid = ast_safe_fork(1);
- if (pid) {
- return pid;
- }
-
- /* Execute RAS on File handles */
- dup2(ast_channel_fd(chan, 0), STDIN_FILENO);
-
- /* Drop high priority */
- if (ast_opt_high_priority)
- ast_set_priority(0);
-
- /* Close other file descriptors */
- ast_close_fds_above_n(STDERR_FILENO);
-
- /* Reset all arguments */
- memset(argv, 0, sizeof(argv));
-
- /* First argument is executable, followed by standard
- arguments for DAHDI PPP */
- argv[argc++] = PPP_EXEC;
- argv[argc++] = "nodetach";
-
- /* And all the other arguments */
- stringp=args;
- c = strsep(&stringp, ",");
- while(c && strlen(c) && (argc < (PPP_MAX_ARGS - 4))) {
- argv[argc++] = c;
- c = strsep(&stringp, ",");
- }
-
- if (geteuid() == 0) {
- argv[argc++] = "plugin";
- argv[argc++] = "dahdi.so";
- }
- argv[argc++] = "stdin";
-
- /* Finally launch PPP */
- execv(PPP_EXEC, argv);
- fprintf(stderr, "Failed to exec PPPD!\n");
- exit(1);
-}
-
-static void run_ras(struct ast_channel *chan, char *args)
-{
- pid_t pid;
- int status;
- int res;
- int signalled = 0;
- struct dahdi_bufferinfo savebi;
- int x;
-
- res = ioctl(ast_channel_fd(chan, 0), DAHDI_GET_BUFINFO, &savebi);
- if(res) {
- ast_log(LOG_WARNING, "Unable to check buffer policy on channel %s\n", ast_channel_name(chan));
- return;
- }
-
- pid = spawn_ras(chan, args);
- if (pid < 0) {
- ast_log(LOG_WARNING, "Failed to spawn RAS\n");
- } else {
- for (;;) {
- res = waitpid(pid, &status, WNOHANG);
- if (!res) {
- /* Check for hangup */
- if (ast_check_hangup(chan) && !signalled) {
- ast_debug(1, "Channel '%s' hungup. Signalling RAS at %d to die...\n", ast_channel_name(chan), pid);
- kill(pid, SIGTERM);
- signalled=1;
- }
- /* Try again */
- sleep(1);
- continue;
- }
- if (res < 0) {
- ast_log(LOG_WARNING, "waitpid returned %d: %s\n", res, strerror(errno));
- }
- if (WIFEXITED(status)) {
- ast_verb(3, "RAS on %s terminated with status %d\n", ast_channel_name(chan), WEXITSTATUS(status));
- } else if (WIFSIGNALED(status)) {
- ast_verb(3, "RAS on %s terminated with signal %d\n",
- ast_channel_name(chan), WTERMSIG(status));
- } else {
- ast_verb(3, "RAS on %s terminated weirdly.\n", ast_channel_name(chan));
- }
- /* Throw back into audio mode */
- x = 1;
- ioctl(ast_channel_fd(chan, 0), DAHDI_AUDIOMODE, &x);
-
- /* Restore saved values */
- res = ioctl(ast_channel_fd(chan, 0), DAHDI_SET_BUFINFO, &savebi);
- if (res < 0) {
- ast_log(LOG_WARNING, "Unable to set buffer policy on channel %s\n", ast_channel_name(chan));
- }
- break;
- }
- }
- ast_safe_fork_cleanup();
-}
-
-static int dahdiras_exec(struct ast_channel *chan, const char *data)
-{
- int res=-1;
- char *args;
- struct dahdi_params dahdip;
-
- if (!data)
- data = "";
-
- args = ast_strdupa(data);
-
- /* Answer the channel if it's not up */
- if (ast_channel_state(chan) != AST_STATE_UP)
- ast_answer(chan);
- if (strcasecmp(ast_channel_tech(chan)->type, "DAHDI")) {
- /* If it's not a DAHDI channel, we're done. Wait a couple of
- seconds and then hangup... */
- ast_verb(2, "Channel %s is not a DAHDI channel\n", ast_channel_name(chan));
- sleep(2);
- } else {
- memset(&dahdip, 0, sizeof(dahdip));
- if (ioctl(ast_channel_fd(chan, 0), DAHDI_GET_PARAMS, &dahdip)) {
- ast_log(LOG_WARNING, "Unable to get DAHDI parameters\n");
- } else if (dahdip.sigtype != DAHDI_SIG_CLEAR) {
- ast_verb(2, "Channel %s is not a clear channel\n", ast_channel_name(chan));
- } else {
- /* Everything should be okay. Run PPP. */
- ast_verb(3, "Starting RAS on %s\n", ast_channel_name(chan));
- /* Execute RAS */
- run_ras(chan, args);
- }
- }
- return res;
-}
-
-static int unload_module(void)
-{
- return ast_unregister_application(app);
-}
-
-static int load_module(void)
-{
- return ((ast_register_application_xml(app, dahdiras_exec)) ? AST_MODULE_LOAD_DECLINE : AST_MODULE_LOAD_SUCCESS);
-}
-
-AST_MODULE_INFO_STANDARD_DEPRECATED(ASTERISK_GPL_KEY, "DAHDI ISDN Remote Access Server");
projects / thirdparty / asterisk.git / commitdiff
