bool
IpcsClassifierRecord::CheckMatchSrcAddr (Ipv4Address srcAddress) const
{
for (std::vector<struct ipv4Addr>::const_iterator iter = m_srcAddr.begin (); iter != m_srcAddr.end (); ++iter)
{
NS_LOG_INFO ("src addr check match: pkt=" << srcAddress << " cls=" << (*iter).Address << "/" << (*iter).Mask);
if (srcAddress.CombineMask ((*iter).Mask) == (*iter).Address)
{
return true;
}
}
NS_LOG_INFO ("NOT OK!");
return false;
}
/*
* If we have an exact match, we return it.
* Otherwise, if we find a generic match, we return it.
* Otherwise, we return 0.
*/
Ipv4EndPointDemux::EndPoints
Ipv4EndPointDemux::Lookup (Ipv4Address daddr, uint16_t dport,
Ipv4Address saddr, uint16_t sport,
Ptr<Ipv4Interface> incomingInterface)
{
NS_LOG_FUNCTION (this << daddr << dport << saddr << sport << incomingInterface);
EndPoints retval1; // Matches exact on local port, wildcards on others
EndPoints retval2; // Matches exact on local port/adder, wildcards on others
EndPoints retval3; // Matches all but local address
EndPoints retval4; // Exact match on all 4
NS_LOG_DEBUG ("Looking up endpoint for destination address " << daddr);
for (EndPointsI i = m_endPoints.begin (); i != m_endPoints.end (); i++)
{
Ipv4EndPoint* endP = *i;
NS_LOG_DEBUG ("Looking at endpoint dport=" << endP->GetLocalPort ()
<< " daddr=" << endP->GetLocalAddress ()
<< " sport=" << endP->GetPeerPort ()
<< " saddr=" << endP->GetPeerAddress ());
if (endP->GetLocalPort () != dport)
{
NS_LOG_LOGIC ("Skipping endpoint " << &endP
<< " because endpoint dport "
<< endP->GetLocalPort ()
<< " does not match packet dport " << dport);
continue;
}
if (endP->GetBoundNetDevice ())
{
if (endP->GetBoundNetDevice () != incomingInterface->GetDevice ())
{
NS_LOG_LOGIC ("Skipping endpoint " << &endP
<< " because endpoint is bound to specific device and"
<< endP->GetBoundNetDevice ()
<< " does not match packet device " << incomingInterface->GetDevice ());
continue;
}
}
bool subnetDirected = false;
Ipv4Address incomingInterfaceAddr = daddr; // may be a broadcast
for (uint32_t i = 0; i < incomingInterface->GetNAddresses (); i++)
{
Ipv4InterfaceAddress addr = incomingInterface->GetAddress (i);
if (addr.GetLocal ().CombineMask (addr.GetMask ()) == daddr.CombineMask (addr.GetMask ()) &&
daddr.IsSubnetDirectedBroadcast (addr.GetMask ()))
{
subnetDirected = true;
incomingInterfaceAddr = addr.GetLocal ();
}
}
bool isBroadcast = (daddr.IsBroadcast () || subnetDirected == true);
NS_LOG_DEBUG ("dest addr " << daddr << " broadcast? " << isBroadcast);
bool localAddressMatchesWildCard =
endP->GetLocalAddress () == Ipv4Address::GetAny ();
bool localAddressMatchesExact = endP->GetLocalAddress () == daddr;
if (isBroadcast)
{
NS_LOG_DEBUG ("Found bcast, localaddr " << endP->GetLocalAddress ());
}
if (isBroadcast && (endP->GetLocalAddress () != Ipv4Address::GetAny ()))
{
localAddressMatchesExact = (endP->GetLocalAddress () ==
incomingInterfaceAddr);
}
// if no match here, keep looking
if (!(localAddressMatchesExact || localAddressMatchesWildCard))
continue;
bool remotePeerMatchesExact = endP->GetPeerPort () == sport;
bool remotePeerMatchesWildCard = endP->GetPeerPort () == 0;
bool remoteAddressMatchesExact = endP->GetPeerAddress () == saddr;
bool remoteAddressMatchesWildCard = endP->GetPeerAddress () ==
Ipv4Address::GetAny ();
// If remote does not match either with exact or wildcard,
// skip this one
if (!(remotePeerMatchesExact || remotePeerMatchesWildCard))
continue;
if (!(remoteAddressMatchesExact || remoteAddressMatchesWildCard))
continue;
// Now figure out which return list to add this one to
if (localAddressMatchesWildCard &&
remotePeerMatchesWildCard &&
remoteAddressMatchesWildCard)
{ // Only local port matches exactly
retval1.push_back (endP);
}
if ((localAddressMatchesExact || (isBroadcast && localAddressMatchesWildCard))&&
remotePeerMatchesWildCard &&
remoteAddressMatchesWildCard)
{ // Only local port and local address matches exactly
retval2.push_back (endP);
}
if (localAddressMatchesWildCard &&
remotePeerMatchesExact &&
remoteAddressMatchesExact)
{ // All but local address
retval3.push_back (endP);
}
if (localAddressMatchesExact &&
remotePeerMatchesExact &&
remoteAddressMatchesExact)
{ // All 4 match
retval4.push_back (endP);
}
}
// Here we find the most exact match
if (!retval4.empty ()) return retval4;
if (!retval3.empty ()) return retval3;
if (!retval2.empty ()) return retval2;
return retval1; // might be empty if no matches
}