From ff9fdbd32f7e71a98c69017a3ebbe102dceb6c45 Mon Sep 17 00:00:00 2001
From: Guilherme Maciel Ferreira <guilherme.maciel.ferreira@gmail.com>
Date: Sat, 24 Dec 2011 12:06:41 -0200
Subject: [PATCH] Fix: handling packets with options length equal to zero.

---
 src/ip/ipv4header.cpp |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/src/ip/ipv4header.cpp b/src/ip/ipv4header.cpp
index 7c13490..1c0dc22 100644
--- a/src/ip/ipv4header.cpp
+++ b/src/ip/ipv4header.cpp
@@ -232,7 +232,7 @@ istream &operator>>(
         GlobalLogger.error() << "Error: invalid IP options length value." << endl;
         is.setstate( ios::failbit );
     }
-    else
+    else if ( ( 0 < options_length ) && ( options_length <= 40 ) )
     {
         size_t options_size = static_cast<size_t>( options_length );
         scoped_array<uint8_t> options_data( new uint8_t[options_size] );
@@ -242,6 +242,10 @@ istream &operator>>(
 
         header.Payload.append( options_data.get(), options_size );
     }
+    else // ( options_length == 0 )
+    {
+        //GlobalLogger.info() << "Info: No options available in this packet." << endl;
+    }
 
     return is;
 }
-- 
1.7.1