From 85d25b950b53cba8943e338b7f3eb4fea04479b8 Mon Sep 17 00:00:00 2001
From: serassio <>
Date: Sun, 24 Dec 2006 20:52:40 +0000
Subject: [PATCH] Bug #1584: Unable to register with multiple WCCP2 routers

Disable PMTU-discovery on the WCCP2 UDP socket, making Linux and possibly
others send unique IP ID fields in the UDP traffic. Hopefully this will
convince Cisco IOS that the WCCP exchanges is not duplicate traffic.

Forward port of 2.6 patch.
---
 src/wccp2.cc | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/wccp2.cc b/src/wccp2.cc
index eed5d35f5d..175570e3b5 100644
--- a/src/wccp2.cc
+++ b/src/wccp2.cc
@@ -1,6 +1,6 @@
 
 /*
- * $Id: wccp2.cc,v 1.11 2006/11/22 06:07:54 adrian Exp $
+ * $Id: wccp2.cc,v 1.12 2006/12/24 13:52:40 serassio Exp $
  *
  * DEBUG: section 80    WCCP Support
  * AUTHOR: Steven Wilton
@@ -968,6 +968,13 @@ wccp2ConnectionOpen(void)
     if (theWccp2Connection < 0)
         fatal("Cannot open WCCP Port");
 
+#if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
+    {
+        int i = IP_PMTUDISC_DONT;
+        setsockopt(theWccp2Connection, SOL_IP, IP_MTU_DISCOVER, &i, sizeof i);
+    }
+
+#endif
     commSetSelect(theWccp2Connection,
                   COMM_SELECT_READ,
                   wccp2HandleUdp,
-- 
2.47.3