Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 7436)
+++ channels/chan_sip.c	(working copy)
@@ -6494,6 +6494,12 @@
 		ast_verbose("RDNIS is %s\n", c);
 	ast_copy_string(p->rdnis, c, sizeof(p->rdnis));
 
+	if ((c = strcasechr(tmp, "reason="))) {
+		c += 7;
+		if ((a = strchr(c, ';')))
+			*a = '\0';
+		pbx_builtin_setvar_helper(p->owner, "SIP_DIVERSION_REASON", c);
+	}
 	return 0;
 }