Index: channel.c
===================================================================
RCS file: /usr/cvsroot/asterisk/channel.c,v
retrieving revision 1.154
diff -u -r1.154 channel.c
--- channel.c	24 Dec 2004 01:40:07 -0000	1.154
+++ channel.c	29 Dec 2004 15:28:15 -0000
@@ -29,6 +29,7 @@
 #include <asterisk/logger.h>
 #include <asterisk/say.h>
 #include <asterisk/file.h>
+#include <asterisk/cli.h>
 #include <asterisk/translate.h>
 #include <asterisk/manager.h>
 #include <asterisk/chanvars.h>
@@ -58,6 +59,7 @@
 
 static int shutting_down = 0;
 static int uniqueint = 0;
+static int cliappregistred = 0;		/* Is the CLI app registred yet? */
 
 unsigned long global_fin = 0, global_fout = 0;
 
@@ -78,6 +80,32 @@
    
 AST_MUTEX_DEFINE_STATIC(chlock);
 
+static int show_channeltypes(int fd, int argc, char *argv[])
+{
+#define FORMAT  "%-7.7s  %-50.50s\n"
+	struct chanlist *cl = backends;
+	ast_cli(fd, FORMAT, "Type", "Description");
+	ast_cli(fd, FORMAT, "------", "-----------");
+	if (ast_mutex_lock(&chlock)) {
+		ast_log(LOG_WARNING, "Unable to lock channel list\n");
+		return -1;
+	}
+	while (cl) {
+		ast_cli(fd, FORMAT, cl->type, cl->description);
+		cl = cl->next;
+	}
+	ast_mutex_unlock(&chlock);
+	return RESULT_SUCCESS;
+
+}
+
+static char show_channeltypes_usage[] = 
+"Usage: show channeltypes\n"
+"       Shows available channel types registred in your Asterisk server.";
+
+static struct ast_cli_entry cli_show_channeltypes = 
+	{ { "show", "channeltypes", NULL }, show_channeltypes, "Show available channel types", show_channeltypes_usage };
+
 int ast_check_hangup(struct ast_channel *chan)
 {
 time_t	myt;
@@ -201,6 +229,10 @@
 	else if (option_verbose > 1)
 		ast_verbose( VERBOSE_PREFIX_2 "Registered channel type '%s' (%s)\n", chan->type, chan->description);
 	ast_mutex_unlock(&chlock);
+	if (!cliappregistred) {
+		ast_cli_register(&cli_show_channeltypes);
+		cliappregistred = 1;
+	}
 	return 0;
 }