app_dahdiras.c File Reference
Execute an ISDN RAS. More...
#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"
Go to the source code of this file.
Defines | |
| #define | PPP_EXEC "/usr/sbin/pppd" |
| #define | PPP_MAX_ARGS 32 |
Functions | |
| static void | __reg_module (void) |
| static void | __unreg_module (void) |
| static int | dahdiras_exec (struct ast_channel *chan, void *data) |
| static int | load_module (void) |
| static void | run_ras (struct ast_channel *chan, char *args) |
| static pid_t | spawn_ras (struct ast_channel *chan, char *args) |
| static int | unload_module (void) |
Variables | |
| static struct ast_module_info __MODULE_INFO_SECTION | __mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "DAHDI ISDN Remote Access Server" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, } |
| static char * | app = "DAHDIRAS" |
| static struct ast_module_info * | ast_module_info = &__mod_info |
Detailed Description
Execute an ISDN RAS.
Definition in file app_dahdiras.c.
Define Documentation
| #define PPP_EXEC "/usr/sbin/pppd" |
Definition at line 79 of file app_dahdiras.c.
Referenced by spawn_ras().
| #define PPP_MAX_ARGS 32 |
Definition at line 78 of file app_dahdiras.c.
Referenced by spawn_ras().
Function Documentation
| static void __reg_module | ( | void | ) | [static] |
Definition at line 235 of file app_dahdiras.c.
| static void __unreg_module | ( | void | ) | [static] |
Definition at line 235 of file app_dahdiras.c.
| static int dahdiras_exec | ( | struct ast_channel * | chan, |
| void * | data | ||
| ) | [static] |
Definition at line 190 of file app_dahdiras.c.
References ast_channel::_state, ast_answer(), ast_log(), AST_STATE_UP, ast_strdupa, ast_verb, ast_channel::fds, LOG_WARNING, ast_channel::name, run_ras(), ast_channel::tech, and ast_channel_tech::type.
Referenced by load_module().
{
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 (chan->_state != AST_STATE_UP)
ast_answer(chan);
if (strcasecmp(chan->tech->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", chan->name);
sleep(2);
} else {
memset(&dahdip, 0, sizeof(dahdip));
if (ioctl(chan->fds[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", chan->name);
} else {
/* Everything should be okay. Run PPP. */
ast_verb(3, "Starting RAS on %s\n", chan->name);
/* Execute RAS */
run_ras(chan, args);
}
}
return res;
}
| static int load_module | ( | void | ) | [static] |
Definition at line 230 of file app_dahdiras.c.
References AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_SUCCESS, ast_register_application_xml, and dahdiras_exec().
{
return ((ast_register_application_xml(app, dahdiras_exec)) ? AST_MODULE_LOAD_FAILURE : AST_MODULE_LOAD_SUCCESS);
}
| static void run_ras | ( | struct ast_channel * | chan, |
| char * | args | ||
| ) | [static] |
Definition at line 132 of file app_dahdiras.c.
References ast_check_hangup(), ast_debug, ast_log(), ast_safe_fork_cleanup(), ast_verb, errno, ast_channel::fds, LOG_WARNING, ast_channel::name, spawn_ras(), status, WEXITSTATUS, and WIFEXITED.
Referenced by dahdiras_exec().
{
pid_t pid;
int status;
int res;
int signalled = 0;
struct dahdi_bufferinfo savebi;
int x;
res = ioctl(chan->fds[0], DAHDI_GET_BUFINFO, &savebi);
if(res) {
ast_log(LOG_WARNING, "Unable to check buffer policy on channel %s\n", chan->name);
return;
}
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 (ast_check_hangup(chan) && !signalled) {
ast_debug(1, "Channel '%s' hungup. Signalling RAS at %d to die...\n", chan->name, 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 (WIFEXITED(status)) {
ast_verb(3, "RAS on %s terminated with status %d\n", chan->name, WEXITSTATUS(status));
} else if (WIFSIGNALED(status)) {
ast_verb(3, "RAS on %s terminated with signal %d\n",
chan->name, WTERMSIG(status));
} else {
ast_verb(3, "RAS on %s terminated weirdly.\n", chan->name);
}
/* Throw back into audio mode */
x = 1;
ioctl(chan->fds[0], DAHDI_AUDIOMODE, &x);
/* Restore saved values */
res = ioctl(chan->fds[0], DAHDI_SET_BUFINFO, &savebi);
if (res < 0) {
ast_log(LOG_WARNING, "Unable to set buffer policy on channel %s\n", chan->name);
}
break;
}
}
ast_safe_fork_cleanup();
}
| static pid_t spawn_ras | ( | struct ast_channel * | chan, |
| char * | args | ||
| ) | [static] |
Definition at line 81 of file app_dahdiras.c.
References ast_close_fds_above_n(), ast_opt_high_priority, ast_safe_fork(), ast_set_priority(), ast_channel::fds, PPP_EXEC, PPP_MAX_ARGS, and strsep().
Referenced by run_ras().
{
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(chan->fds[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, ",");
}
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 int unload_module | ( | void | ) | [static] |
Definition at line 225 of file app_dahdiras.c.
References ast_unregister_application().
{
return ast_unregister_application(app);
}
Variable Documentation
struct ast_module_info __MODULE_INFO_SECTION __mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "DAHDI ISDN Remote Access Server" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, } [static] |
Definition at line 235 of file app_dahdiras.c.
char* app = "DAHDIRAS" [static] |
Definition at line 76 of file app_dahdiras.c.
struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 235 of file app_dahdiras.c.
