diff options
author | markster <markster@f38db490-d61c-443f-a65b-d21fe96a405b> | 2002-03-08 23:48:42 +0000 |
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committer | markster <markster@f38db490-d61c-443f-a65b-d21fe96a405b> | 2002-03-08 23:48:42 +0000 |
commit | e1409a83e2f766709555297ae8a7cba634573456 (patch) | |
tree | 30b1c88e01bad4351cf9d1d414f27073b5841b7c /apps | |
parent | 92db65b4be241f314cd97431dcf1f76e76d34131 (diff) |
Version 0.1.11 from FTP
git-svn-id: http://svn.digium.com/svn/asterisk/trunk@422 f38db490-d61c-443f-a65b-d21fe96a405b
Diffstat (limited to 'apps')
-rwxr-xr-x | apps/app_zapras.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/apps/app_zapras.c b/apps/app_zapras.c new file mode 100755 index 000000000..53f306cdc --- /dev/null +++ b/apps/app_zapras.c @@ -0,0 +1,237 @@ +/* + * Asterisk -- A telephony toolkit for Linux. + * + * Execute an ISDN RAS + * + * Copyright (C) 1999, Mark Spencer + * + * Mark Spencer <markster@linux-support.net> + * + * This program is free software, distributed under the terms of + * the GNU General Public License + */ + +#include <asterisk/file.h> +#include <asterisk/logger.h> +#include <asterisk/channel.h> +#include <asterisk/pbx.h> +#include <asterisk/module.h> +#include <asterisk/options.h> +#include <sys/ioctl.h> +#include <sys/wait.h> +#include <sys/signal.h> + +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <stdlib.h> + +#include <pthread.h> + +/* Need some zaptel help here */ +#include <linux/zaptel.h> + +static char *tdesc = "Zap RAS Application"; + +static char *app = "ZapRAS"; + +static char *synopsis = "Executes Zaptel ISDN RAS application"; + +static char *descrip = +" ZapRAS(args): Executes a RAS server using pppd on the given channel.\n" +"The channel must be a clear channel (i.e. PRI source) and a Zaptel\n" +"channel to be able to use this function (No modem emulcation is included).\n" +"Your pppd must be patched to be zaptel aware. Arguments should be\n" +"separated by | characters. Always returns -1.\n"; + +STANDARD_LOCAL_USER; + +LOCAL_USER_DECL; + +#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; + int x; + char *c; + + char *argv[PPP_MAX_ARGS]; + int argc = 0; + + /* Start by forking */ + pid = fork(); + if (pid) + return pid; + + /* Execute RAS on File handles */ + dup2(chan->fds[0], STDIN_FILENO); + + /* Close other file descriptors */ + for (x=STDERR_FILENO + 1;x<1024;x++) + close(x); + + /* Restore original signal handlers */ + for (x=0;x<NSIG;x++) + signal(x, SIG_DFL); + + /* Reset all arguments */ + memset(argv, 0, sizeof(argv)); + + /* First argument is executable, followed by standard + arguments for zaptel PPP */ + argv[argc++] = PPP_EXEC; + argv[argc++] = "nodetach"; + + /* And all the other arguments */ + c = strtok(args, "|"); + while(c && strlen(c) && (argc < (PPP_MAX_ARGS - 4))) { + argv[argc++] = c; + c = strtok(NULL, "|"); + } + + argv[argc++] = "plugin"; + argv[argc++] = "zaptel.so"; + argv[argc++] = "stdin"; + +#if 0 + for (x=0;x<argc;x++) { + fprintf(stderr, "Arg %d: %s\n", x, argv[x]); + } +#endif + + /* 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 zt_bufferinfo bi; + int x; + + pid = spawn_ras(chan, args); + if (pid < 0) { + ast_log(LOG_WARNING, "Failed to spawn RAS\n"); + } else { + for (;;) { + res = wait4(pid, &status, WNOHANG, NULL); + if (!res) { + /* Check for hangup */ + if (chan->softhangup && !signalled) { + ast_log(LOG_DEBUG, "Channel hungup. Signalling RAS at %d to die...\n", pid); + kill(pid, SIGTERM); + signalled=1; + } + /* Try again */ + sleep(1); + continue; + } + if (res < 0) { + ast_log(LOG_WARNING, "wait4 returned %d: %s\n", res, strerror(errno)); + } + if (option_verbose > 2) { + if (WIFEXITED(status)) { + ast_verbose(VERBOSE_PREFIX_3 "RAS on %s terminated with status %d\n", chan->name, WEXITSTATUS(status)); + } else if (WIFSIGNALED(status)) { + ast_verbose(VERBOSE_PREFIX_3 "RAS on %s terminated with signal %d\n", + chan->name, WTERMSIG(status)); + } else { + ast_verbose(VERBOSE_PREFIX_3 "RAS on %s terminated weirdly.\n", chan->name); + } + } + /* Throw back into audio mode */ + x = 0; + ioctl(chan->fds[0], ZT_AUDIOMODE, &x); + + /* Double check buffering too */ + res = ioctl(chan->fds[0], ZT_GET_BUFINFO, &bi); + if (!res) { + /* XXX This is ZAP_BLOCKSIZE XXX */ + bi.bufsize = 204; + bi.txbufpolicy = ZT_POLICY_IMMEDIATE; + bi.rxbufpolicy = ZT_POLICY_IMMEDIATE; + bi.numbufs = 4; + res = ioctl(chan->fds[0], ZT_SET_BUFINFO, &bi); + if (res < 0) { + ast_log(LOG_WARNING, "Unable to set buffer policy on channel %s\n", chan->name); + } + } else + ast_log(LOG_WARNING, "Unable to check buffer policy on channel %s\n", chan->name); + break; + } + } +} + +static int zapras_exec(struct ast_channel *chan, void *data) +{ + int res=-1; + char args[256]; + struct localuser *u; + ZT_PARAMS ztp; + + if (!data) + data = ""; + LOCAL_USER_ADD(u); + strncpy(args, data, sizeof(args) - 1); + /* Answer the channel if it's not up */ + if (chan->state != AST_STATE_UP) + ast_answer(chan); + if (strcasecmp(chan->type, "Zap")) { + /* If it's not a zap channel, we're done. Wait a couple of + seconds and then hangup... */ + if (option_verbose > 1) + ast_verbose(VERBOSE_PREFIX_2 "Channel %s is not a Zap channel\n", chan->name); + sleep(2); + } else { + memset(&ztp, 0, sizeof(ztp)); + if (ioctl(chan->fds[0], ZT_GET_PARAMS, &ztp)) { + ast_log(LOG_WARNING, "Unable to get zaptel parameters\n"); + } else if (ztp.sigtype != ZT_SIG_CLEAR) { + if (option_verbose > 1) + ast_verbose(VERBOSE_PREFIX_2 "Channel %s is not a clear channel\n", chan->name); + } else { + /* Everything should be okay. Run PPP. */ + if (option_verbose > 2) + ast_verbose(VERBOSE_PREFIX_3 "Starting RAS on %s\n", chan->name); + /* Execute RAS */ + run_ras(chan, args); + } + } + LOCAL_USER_REMOVE(u); + return res; +} + +int unload_module(void) +{ + STANDARD_HANGUP_LOCALUSERS; + return ast_unregister_application(app); +} + +int load_module(void) +{ + return ast_register_application(app, zapras_exec, synopsis, descrip); +} + +char *description(void) +{ + return tdesc; +} + +int usecount(void) +{ + int res; + STANDARD_USECOUNT(res); + return res; +} + +char *key() +{ + return ASTERISK_GPL_KEY; +} |