From 59ba782a72b3da4f50987e32053d9dee094ff43f Mon Sep 17 00:00:00 2001
From: Robert Ricci <ricci@cs.utah.edu>
Date: Wed, 6 Sep 2006 17:57:29 +0000
Subject: [PATCH] Add a check for TCP window scaling, which is not yet
supported
---
pelab/magent/PacketSensor.cc | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/pelab/magent/PacketSensor.cc b/pelab/magent/PacketSensor.cc
index aa04892846..15baf5e349 100644
--- a/pelab/magent/PacketSensor.cc
+++ b/pelab/magent/PacketSensor.cc
@@ -41,6 +41,21 @@ Time const & PacketSensor::getAckedSendTime(void) const
void PacketSensor::localSend(PacketInfo * packet)
{
+ /*
+ * Check for window scaling, which is not supported yet by this code. This
+ * option is only legal on SACK packets. If we decide to support window
+ * scaling in the future, it might be better to move it to some other sensor
+ */
+ if (packet->tcp->syn) {
+ list<Option>::iterator opt;
+ for (opt = packet->tcpOptions->begin();
+ opt != packet->tcpOptions->end();
+ ++opt) {
+ if (opt->type == TCPOPT_WINDOW) {
+ logWrite(ERROR,"TCP window scaling in use - not supported!");
+ }
+ }
+ }
// Assume this packet is not a retransmit unless proven otherwise
isRetransmit = false;
if (state->getState() == StateSensor::ESTABLISHED)
--
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