From 322aa506a19684d2fd3ca6040ae5c9ac55f34a28 Mon Sep 17 00:00:00 2001
From: Keith Winstein <keithw@mit.edu>
Date: Sat, 7 Jan 2012 04:24:55 -0500
Subject: [PATCH] Use PMTUDISC_WANT

---
 network.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/network.cpp b/network.cpp
index 442a5ed..d60205a 100644
--- a/network.cpp
+++ b/network.cpp
@@ -75,6 +75,13 @@ void Connection::setup( void )
   if ( sock < 0 ) {
     throw NetworkException( "socket", errno );
   }
+
+  /* Enable path MTU discovery */
+  char flag = IP_PMTUDISC_WANT;
+  socklen_t optlen = sizeof( flag );
+  if ( setsockopt( sock, IPPROTO_IP, IP_MTU_DISCOVER, &flag, optlen ) < 0 ) {
+    throw NetworkException( "setsockopt", errno );
+  }
 }
 
 Connection::Connection() /* server */