Sun Mar 16 07:00:01 CET 2003

git-svn-id: http://svn.digium.com/svn/asterisk/trunk@646 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 130 insertions, 0 deletions

diff --git a/apps/app_chanisavail.c b/apps/app_chanisavail.c
new file mode 100755
index 000000000..e2ad6e7e9
--- /dev/null
+++ b/apps/app_chanisavail.c
@@ -0,0 +1,130 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Check if Channel is Available
+ * 
+ * Copyright (C) 2003, Digium
+ *
+ * Mark Spencer <markster@digium.com>
+ * James Golovich <james@gnuinter.net>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ *
+ */
+
+#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/app.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+
+#include <pthread.h>
+
+static char *tdesc = "Check if channel is available";
+
+static char *app = "ChanIsAvail";
+
+static char *synopsis = "Check if channel is available";
+
+static char *descrip = 
+"  ChanIsAvail(Technology/resource[&Technology2/resource2...]): \n"
+"Checks is any of the requested channels are available.  If none\n"
+"of the requested channels are available the new priority will\n"
+"be n+101 (unless such a priority does not exist, in which case\n"
+"ChanIsAvail will return -1.  If any of the requested channels\n"
+"are available, the next priority will be n+1 and ChanIsAvail\n"
+"will return 0.\n";
+
+STANDARD_LOCAL_USER;
+
+LOCAL_USER_DECL;
+
+static int chanavail_exec(struct ast_channel *chan, void *data)
+{
+	int res=-1;
+	struct localuser *u;
+	char info[256], *peers, *tech, *number, *rest, *cur;
+	struct ast_channel *tempchan;
+
+	if (!data) {
+		ast_log(LOG_WARNING, "ChanIsAvail requires an argument (Zap/1&Zap/2)\n");
+		return -1;
+	}
+	LOCAL_USER_ADD(u);
+
+	strncpy(info, (char *)data, strlen((char *)data) + AST_MAX_EXTENSION-1);
+	peers = info;
+	if (peers) {
+		cur = peers;
+		do {
+			/* remember where to start next time */
+			rest = strchr(cur, '&');
+			if (rest) {
+				*rest = 0;
+				rest++;
+			}
+			tech = cur;
+			number = strchr(tech, '/');
+			if (!number) {
+				ast_log(LOG_WARNING, "ChanIsAvail argument takes format (Zap/[device])\n");
+				continue;
+			}
+			*number = '\0';
+			number++;
+			if ((tempchan = ast_request(tech, chan->nativeformats, number))) {
+					ast_hangup(tempchan);
+					tempchan = NULL;
+					res = 1;
+					break;
+			}
+			cur = rest;
+		} while (cur);
+	}
+
+	if (res < 1) {
+		if (ast_exists_extension(chan, chan->context, chan->exten, chan->priority + 101, chan->callerid))
+			chan->priority+=100;
+		else
+			return -1;
+	}
+
+	LOCAL_USER_REMOVE(u);
+	return 0;
+}
+
+int unload_module(void)
+{
+	STANDARD_HANGUP_LOCALUSERS;
+	return ast_unregister_application(app);
+}
+
+int load_module(void)
+{
+	return ast_register_application(app, chanavail_exec, synopsis, descrip);
+}
+
+char *description(void)
+{
+	return tdesc;
+}
+
+int usecount(void)
+{
+	int res;
+	STANDARD_USECOUNT(res);
+	return res;
+}
+
+char *key()
+{
+	return ASTERISK_GPL_KEY;
+}