Bug #792: Add app_random

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@1958 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/Makefile

@@ -25,7 +25,7 @@ APPS=app_dial.so app_playback.so app_voicemail.so app_directory.so app_mp3.so\
      app_waitforring.so app_privacy.so app_db.so app_chanisavail.so \
      app_enumlookup.so app_transfer.so app_setcidnum.so app_cdr.so \
      app_hasnewvoicemail.so app_sayunixtime.so app_cut.so app_read.so \
-     app_setcdruserfield.so
+     app_setcdruserfield.so app_random.so
 
 ifneq (${OSARCH},Darwin)
 APPS+=app_intercom.so

apps/app_random.c

@@ -0,0 +1,128 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Random application
+ * 
+ * Copyright (c) 2003-2004 Tilghman Lesher.  All rights reserved.
+ *
+ * Tilghman Lesher <asterisk__app_random__20040111@the-tilghman.com>
+ *
+ * This code is released by the author with no restrictions on usage or distribution.
+ *
+ */
+
+#include <asterisk/file.h>
+#include <asterisk/logger.h>
+#include <asterisk/options.h>
+#include <asterisk/channel.h>
+#include <asterisk/pbx.h>
+#include <asterisk/module.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+
+static char *tdesc = "Random goto";
+
+static char *app_random = "Random";
+
+static char *random_synopsis = "Conditionally branches, based upon a probability";
+
+static char *random_descrip =
+"Random([probability]:[[context|]extension|]priority)\n"
+"  probability := INTEGER in the range 1 to 100\n";
+
+STANDARD_LOCAL_USER;
+
+LOCAL_USER_DECL;
+
+static int random_exec(struct ast_channel *chan, void *data)
+{
+	int res=0;
+	struct localuser *u;
+
+	char *s, *ts;
+	char *exten, *pri, *context;
+	char *prob;
+	int probint, priorityint;
+
+	if (!data) {
+		ast_log(LOG_WARNING, "Random requires an argument ([probability]:[[context|]extension|]priority)\n");
+		return -1;
+	}
+	LOCAL_USER_ADD(u);
+	s = ast_strdupa((void *) data);
+
+	prob = strsep(&ts,":");
+	if ((!prob) || (sscanf(prob, "%d", &probint) != 1))
+		probint = 0;
+
+	if ((random() % 100) + probint > 100) {
+		context = strsep(&s, "|");
+		exten = strsep(&s, "|");
+		if (!exten) {
+			/* Only a priority */
+			pri = context;
+			exten = NULL;
+			context = NULL;
+		} else {
+			pri = strsep(&s, "|");
+			if (!pri) {
+				pri = exten;
+				exten = context;
+				context = NULL;
+			}
+		}
+		if (!pri) {
+			ast_log(LOG_WARNING, "No label specified\n");
+			LOCAL_USER_REMOVE(u);
+			return -1;
+		} else if (sscanf(pri, "%d", &priorityint) != 1) {
+			ast_log(LOG_WARNING, "Priority '%s' must be a number > 0\n", pri);
+			LOCAL_USER_REMOVE(u);
+			return -1;
+		}
+		/* At this point we have a priority and */
+		/* maybe an extension and a context     */
+		chan->priority = priorityint - 1;
+		if (exten && strcasecmp(exten, "BYEXTENSION"))
+			strncpy(chan->exten, exten, sizeof(chan->exten)-1);
+		if (context)
+			strncpy(chan->context, context, sizeof(chan->context)-1);
+		if (option_verbose > 2)
+			ast_verbose( VERBOSE_PREFIX_3 "Random branches to (%s,%s,%d)\n",
+				chan->context,chan->exten, chan->priority+1);
+		LOCAL_USER_REMOVE(u);
+	}
+	return res;
+}
+
+int unload_module(void)
+{
+	STANDARD_HANGUP_LOCALUSERS;
+	return ast_unregister_application(app_random);
+}
+
+int load_module(void)
+{
+	srandom((unsigned int)getpid() + (unsigned int)time(NULL));
+	return ast_register_application(app_random, random_exec, random_synopsis, random_descrip);
+}
+
+char *description(void)
+{
+	return tdesc;
+}
+
+int usecount(void)
+{
+	int res;
+	STANDARD_USECOUNT(res);
+	return res;
+}
+
+char *key()
+{
+	return ASTERISK_GPL_KEY;
+}