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internet: Fix RipNg::Lookup()

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This commit is contained in:
Tommaso Pecorella
2024-01-22 18:40:36 +00:00
committed by Eduardo Almeida
parent 3acb31ce5f
commit 773edd2765
1 changed files with 8 additions and 7 deletions
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15
src/internet/model/ripng.cc
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@@ -657,22 +657,23 @@ RipNg::Lookup(Ipv6Address dst, bool setSource, Ptr<NetDevice> interface)
if (setSource)
{
if (route->GetGateway().IsAny())
// GetGateway().IsAny() means that the destination is reachable without a
// gateway (is on-link). GetDest().IsAny() means that the route is the
// default route. Having both true is very strange, but possible.
// If the RT entry is specific for a destination, use that as a hint for the
// source address to be used. Else, use the destination or the prefix to be
// used stated in the RT entry.
if (!route->GetDest().IsAny())
{
rtentry->SetSource(
m_ipv6->SourceAddressSelection(interfaceIdx, route->GetDest()));
}
else if (route->GetDest().IsAny()) /* default route */
else
{
rtentry->SetSource(m_ipv6->SourceAddressSelection(
interfaceIdx,
route->GetPrefixToUse().IsAny() ? dst : route->GetPrefixToUse()));
}
else
{
rtentry->SetSource(
m_ipv6->SourceAddressSelection(interfaceIdx, route->GetDest()));
}
}
rtentry->SetDestination(route->GetDest());