X-Git-Url: http://g0dil.de/git?a=blobdiff_plain;f=Packets%2FDefaultBundle%2FICMPv6Packet.cc;h=0556fec61df87779f3da8a48ab1e2841bcba1298;hb=3863d46dd898b7bc35ea8c6ccd8563b18762a6b6;hp=d70e7f52f44414c176c7be20d8c1ebecc7b4294f;hpb=962f88fbbfc6f4da1502088dfa94273e7fbd3c80;p=senf.git

diff --git a/Packets/DefaultBundle/ICMPv6Packet.cc b/Packets/DefaultBundle/ICMPv6Packet.cc
index d70e7f5..0556fec 100644
--- a/Packets/DefaultBundle/ICMPv6Packet.cc
+++ b/Packets/DefaultBundle/ICMPv6Packet.cc
@@ -34,10 +34,15 @@ namespace {
         registerICMPv6Packet (58);
 }
 
-prefix_ boost::uint16_t senf::ICMPv6PacketParser::calcChecksum() const {
+prefix_ boost::uint16_t senf::ICMPv6PacketParser::calcChecksum() 
+    const
+{
 
     senf::IpChecksum summer;
     senf::IPv6Packet ipv6 (packet().rfind<senf::IPv6Packet>(senf::nothrow));
+
+    if (! ipv6)
+        return 0u;
     
     summer.feed( ipv6->source().i(), 
                     ipv6->source().i() + senf::IPv6Packet::Parser::source_t::fixed_bytes );
@@ -70,3 +75,14 @@ prefix_ void senf::ICMPv6PacketType::dump(packet p, std::ostream &os)
 }
 
 #undef prefix_
+
+
+// Local Variables:
+// mode: c++
+// fill-column: 100
+// c-file-style: "senf"
+// indent-tabs-mode: nil
+// ispell-local-dictionary: "american"
+// compile-command: "scons -u test"
+// comment-column: 40
+// End: