From a7690a7389f967f2a1c3a50d393ee8ed3db08773 Mon Sep 17 00:00:00 2001
From: Benny Prijono <bennylp@teluu.com>
Date: Wed, 7 Oct 2009 08:42:28 +0000
Subject: More #962: STUN compatibility problem with RFC 3489 servers (in
 encoding SERVER-NAME or SOFTWARE attribute):  - backported r2928

git-svn-id: http://svn.pjsip.org/repos/pjproject/branches/adhocs/1.4.5@2929 74dad513-b988-da41-8d7b-12977e46ad98
---
 pjnath/src/pjnath-test/stun.c |  8 +++++++-
 pjnath/src/pjnath/stun_msg.c  | 18 +++++++++++++++---
 2 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/pjnath/src/pjnath-test/stun.c b/pjnath/src/pjnath-test/stun.c
index 9efc08d9..ccfbc474 100644
--- a/pjnath/src/pjnath-test/stun.c
+++ b/pjnath/src/pjnath-test/stun.c
@@ -479,7 +479,9 @@ static struct test_vector
 	"",
 	"",
 	&create_msgint1
-    },
+    }
+    /* disabled: see http://trac.pjsip.org/repos/ticket/960
+    ,
     {
 	PJ_STUN_BINDING_RESPONSE,
 	"\xb7\xe7\xa7\x01\xbc\x34\xd6\x86\xfa\x87\xdf\xae",
@@ -503,6 +505,9 @@ static struct test_vector
 	"",
 	&create_msgint2
     }
+    */
+
+    /* disabled: see http://trac.pjsip.org/repos/ticket/960
 #if defined(PJ_HAS_IPV6) && PJ_HAS_IPV6!=0
     ,
     {
@@ -542,6 +547,7 @@ static struct test_vector
 	&create_msgint3
     }
 #endif
+    */
 };
 
 
diff --git a/pjnath/src/pjnath/stun_msg.c b/pjnath/src/pjnath/stun_msg.c
index fb9f1cb9..e9c86212 100644
--- a/pjnath/src/pjnath/stun_msg.c
+++ b/pjnath/src/pjnath/stun_msg.c
@@ -1235,10 +1235,22 @@ static pj_status_t encode_string_attr(const void *a, pj_uint8_t *buf,
 
     PUTVAL16H(buf, 0, ca->hdr.type);
 
-    /* Set the length to be 4-bytes aligned so that we can
-     * communicate with RFC 3489 endpoints
+    /* Special treatment for SOFTWARE attribute:
+     * This attribute had caused interop problem when talking to 
+     * legacy RFC 3489 STUN servers, due to different "length"
+     * rules with RFC 5389.
      */
-    PUTVAL16H(buf, 2, (pj_uint16_t)((ca->value.slen + 3) & (~3)));
+    if (msghdr->magic != PJ_STUN_MAGIC ||
+	ca->hdr.type == PJ_STUN_ATTR_SOFTWARE)
+    {
+	/* Set the length to be 4-bytes aligned so that we can
+	 * communicate with RFC 3489 endpoints
+	 */
+	PUTVAL16H(buf, 2, (pj_uint16_t)((ca->value.slen + 3) & (~3)));
+    } else {
+	/* Use RFC 5389 rule */
+	PUTVAL16H(buf, 2, (pj_uint16_t)ca->value.slen);
+    }
 
     /* Copy the string */
     pj_memcpy(buf+ATTR_HDR_LEN, ca->value.ptr, ca->value.slen);
-- 
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