Add new rtpsource options to the CHANNEL function.

This adds rtpsource options analogous to the rtpdest
functions that already exist. In addition, this fixes
potential crashes which could result due to trying to
read values from nonexistent RTP streams.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@254551 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/sip/dialplan_functions.c b/channels/sip/dialplan_functions.c
index 473199c71404b399fe80ff89a16f317befcab2cf..297f9f5dab4eeb40f804adc60a7650fa8c83fcd9 100644 (file)
--- a/channels/sip/dialplan_functions.c
+++ b/channels/sip/dialplan_functions.c
@@ -28,6 +28,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include "asterisk/channel.h"
 #include "asterisk/rtp_engine.h"
 #include "asterisk/pbx.h"
+#include "asterisk/acl.h"
 
 #include "include/sip.h"
 #include "include/globals.h"
@@ -76,19 +77,54 @@ int sip_acf_channel_read(struct ast_channel *chan, const char *funcname, char *p
                ast_copy_string(buf, (p->t38.state == T38_DISABLED) ? "0" : "1", buflen);
        } else if (!strcasecmp(args.param, "rtpdest")) {
                struct sockaddr_in sin;
+               struct ast_rtp_instance *stream;
 
                if (ast_strlen_zero(args.type))
                        args.type = "audio";
 
                if (!strcasecmp(args.type, "audio"))
-                       ast_rtp_instance_get_remote_address(p->rtp, &sin);
+                       stream = p->rtp;
                else if (!strcasecmp(args.type, "video"))
-                       ast_rtp_instance_get_remote_address(p->vrtp, &sin);
+                       stream = p->vrtp;
                else if (!strcasecmp(args.type, "text"))
-                       ast_rtp_instance_get_remote_address(p->trtp, &sin);
+                       stream = p->trtp;
                else
                        return -1;
 
+               if (!stream) {
+                       return -1;
+               }
+
+               ast_rtp_instance_get_remote_address(stream, &sin);
+               snprintf(buf, buflen, "%s:%d", ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
+       } else if (!strcasecmp(args.param, "rtpsource")) {
+               struct sockaddr_in sin;
+               struct ast_rtp_instance *stream;
+
+               if (ast_strlen_zero(args.type))
+                       args.type = "audio";
+
+               if (!strcasecmp(args.type, "audio"))
+                       stream = p->rtp;
+               else if (!strcasecmp(args.type, "video"))
+                       stream = p->vrtp;
+               else if (!strcasecmp(args.type, "text"))
+                       stream = p->trtp;
+               else
+                       return -1;
+
+               if (!stream) {
+                       return -1;
+               }
+
+               ast_rtp_instance_get_local_address(stream, &sin);
+
+               if (!sin.sin_addr.s_addr) {
+                       struct sockaddr_in dest_sin;
+                       ast_rtp_instance_get_remote_address(stream, &dest_sin);
+                       ast_ouraddrfor(&dest_sin.sin_addr, &sin.sin_addr);
+               }
+
                snprintf(buf, buflen, "%s:%d", ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
        } else if (!strcasecmp(args.param, "rtpqos")) {
                struct ast_rtp_instance *rtp = NULL;