Version 0.1.11 from FTP

git-svn-id: http://svn.digium.com/svn/asterisk/trunk@422 f38db490-d61c-443f-a65b-d21fe96a405b

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;
+}