From 33f430ac774fb99afb828fc3eab8eb4ac575625f Mon Sep 17 00:00:00 2001
From: bodea <bodea>
Date: Wed, 2 Aug 2006 14:17:30 +0000
Subject: [PATCH] allow DNS servers to be specified using either old or new
 vendor-specific Ascend formats

---
 Changes     |  4 +++-
 l2tpns.spec |  2 +-
 radius.c    | 53 ++++++++++++++++++++++++++++++-----------------------
 3 files changed, 34 insertions(+), 25 deletions(-)

diff --git a/Changes b/Changes
index 2a3167f..a37c50e 100644
--- a/Changes
+++ b/Changes
@@ -1,4 +1,4 @@
-* Wed Aug 2 2006 Brendan O'Dea <bod@optus.net> 2.2.0
+* Thu Aug 3 2006 Brendan O'Dea <bod@optus.net> 2.2.0
 - Only poll clifd if successfully bound.
 - Add "Practical VPNs" document from Liran Tal as Docs/vpn .
 - Add Multilink support from Khaled Al Hamwi.
@@ -10,6 +10,8 @@
   AVP is not present.
 - Add radius_bind_{min,max} to simplify firewalling of RADIUS ports.
 - Fix sign problem with reporting of unknown RADIUS VSAs.
+- Allow DNS servers to be specified either using the old or new
+  vendor-specific Ascend formats.
 
 * Tue Apr 18 2006 Brendan O'Dea <bod@optus.net> 2.1.18
 - Don't shutdown on TerminateReq, wait for CDN.
diff --git a/l2tpns.spec b/l2tpns.spec
index 6b66952..d2a563b 100644
--- a/l2tpns.spec
+++ b/l2tpns.spec
@@ -43,5 +43,5 @@ rm -rf %{buildroot}
 %attr(644,root,root) /usr/share/man/man[58]/*
 
 %changelog
-* Wed Aug 2 2006 Brendan O'Dea <bod@optus.net> 2.2.0-1
+* Thu Aug 3 2006 Brendan O'Dea <bod@optus.net> 2.2.0-1
 - 2.2.0 release, see /usr/share/doc/l2tpns-2.2.0/Changes
diff --git a/radius.c b/radius.c
index 3dabc34..f35e78d 100644
--- a/radius.c
+++ b/radius.c
@@ -1,6 +1,6 @@
 // L2TPNS Radius Stuff
 
-char const *cvs_id_radius = "$Id: radius.c,v 1.54 2006/08/02 13:35:39 bodea Exp $";
+char const *cvs_id_radius = "$Id: radius.c,v 1.55 2006/08/02 14:17:30 bodea Exp $";
 
 #include <time.h>
 #include <stdio.h>
@@ -635,6 +635,35 @@ void processrad(uint8_t *buf, int len, char socket_index)
 				uint8_t *e = buf + len;
 				for (; p + 2 <= e && p[1] && p + p[1] <= e; p += p[1])
 				{
+					if (*p == 26 && p[1] >= 7)
+					{
+						// Vendor-Specific Attribute
+						uint32_t vendor = ntohl(*(int *)(p + 2));
+						uint8_t attrib = *(p + 6);
+						int attrib_length = *(p + 7) - 2;
+
+						LOG(4, s, session[s].tunnel, "   Radius reply contains Vendor-Specific.  Vendor=%u Attrib=%u Length=%d\n", vendor, attrib, attrib_length);
+						if (vendor == 9 && attrib == 1) // Cisco-AVPair
+						{
+							if (attrib_length < 0) continue;
+							LOG(3, s, session[s].tunnel, "      Cisco-AVPair value: %.*s\n",
+								attrib_length, p + 8);
+
+							handle_avpair(s, p + 8, attrib_length);
+							continue;
+						}
+						else if (vendor == 529 && attrib >= 135 && attrib <= 136) // Ascend
+						{
+							// handle old-format ascend DNS attributes below
+						    	p += 6;
+						}
+						else
+						{
+							LOG(3, s, session[s].tunnel, "      Unknown vendor-specific\n");
+							continue;
+						}
+					}
+
 					if (*p == 8)
 					{
 						// Framed-IP-Address
@@ -762,28 +791,6 @@ void processrad(uint8_t *buf, int len, char socket_index)
 						session[s].idle_timeout = ntohl(*(uint32_t *)(p + 2));
 						LOG(3, s, session[s].tunnel, "   Radius reply contains Idle-Timeout = %u\n", session[s].idle_timeout);
 					}
-					else if (*p == 26 && p[1] >= 7)
-					{
-						// Vendor-Specific Attribute
-						uint32_t vendor = ntohl(*(int *)(p + 2));
-						uint8_t attrib = *(p + 6);
-						int attrib_length = *(p + 7) - 2;
-
-						LOG(3, s, session[s].tunnel, "   Radius reply contains Vendor-Specific.  Vendor=%u Attrib=%u Length=%d\n", vendor, attrib, attrib_length);
-						if (vendor != 9 || attrib != 1)
-						{
-							LOG(3, s, session[s].tunnel, "      Unknown vendor-specific\n");
-							continue;
-						}
-
-						if (attrib_length > 0)
-						{
-							LOG(3, s, session[s].tunnel, "      Cisco-AVPair value: %.*s\n",
-								attrib_length, p + 8);
-
-							handle_avpair(s, p + 8, attrib_length);
-						}
-					}
 					else if (*p == 99)
 					{
 						// Framed-IPv6-Route
-- 
2.20.1