From daeb0956524606b597704a90b54d81340e10b3e4 Mon Sep 17 00:00:00 2001
From: Joshua Colp <jcolp@digium.com>
Date: Tue, 7 Mar 2017 12:32:49 +0000
Subject: [PATCH] Add support for registering IPv6 transport type.

This change allows an IPv6 transport type to be registered
and used. The IPv4 transport is found (if available) and the
IPv4 flag added to its type to match how the finding of
IPv6 transport types works.
---
 pjsip/src/pjsip/sip_transport.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/pjsip/src/pjsip/sip_transport.c b/pjsip/src/pjsip/sip_transport.c
index 7df6138..ce72814 100644
--- a/pjsip/src/pjsip/sip_transport.c
+++ b/pjsip/src/pjsip/sip_transport.c
@@ -236,6 +236,7 @@ PJ_DEF(pj_status_t) pjsip_transport_register_type( unsigned tp_flag,
 						   int *p_tp_type)
 {
     unsigned i;
+    pjsip_transport_type_e parent = 0;
 
     PJ_ASSERT_RETURN(tp_flag && tp_name && def_port, PJ_EINVAL);
     PJ_ASSERT_RETURN(pj_ansi_strlen(tp_name) <
@@ -243,6 +244,11 @@ PJ_DEF(pj_status_t) pjsip_transport_register_type( unsigned tp_flag,
 		     PJ_ENAMETOOLONG);
 
     for (i=1; i<PJ_ARRAY_SIZE(transport_names); ++i) {
+        if (tp_flag & PJSIP_TRANSPORT_IPV6 &&
+            pj_stricmp2(&transport_names[i].name, tp_name) == 0)
+        {
+	    parent = transport_names[i].type;
+        }
 	if (transport_names[i].type == 0)
 	    break;
     }
@@ -250,14 +256,19 @@ PJ_DEF(pj_status_t) pjsip_transport_register_type( unsigned tp_flag,
     if (i == PJ_ARRAY_SIZE(transport_names))
 	return PJ_ETOOMANY;
 
-    transport_names[i].type = (pjsip_transport_type_e)i;
+    if (tp_flag & PJSIP_TRANSPORT_IPV6 && parent) {
+        transport_names[i].type = parent | PJSIP_TRANSPORT_IPV6;
+    } else {
+        transport_names[i].type = (pjsip_transport_type_e)i;
+    }
+
     transport_names[i].port = (pj_uint16_t)def_port;
     pj_ansi_strcpy(transport_names[i].name_buf, tp_name);
     transport_names[i].name = pj_str(transport_names[i].name_buf);
     transport_names[i].flag = tp_flag;
 
     if (p_tp_type)
-	*p_tp_type = i;
+	*p_tp_type = transport_names[i].type;
 
     return PJ_SUCCESS;
 }
-- 
2.7.4