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[routing-manager] allow old deprecating PIOs when checking RA is from router (#8193)

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This commit updates `IsReceivedRouterAdvertFromManager()` which checks
if a received RA message was prepared by the `RoutingManager module
itself to allow deprecating PIOs in the RA message. These will handle
the case when old on-link prefix(es) (e.g., on extended PAN ID change)
are being deprecated.
This commit is contained in:
Abtin Keshavarzian
2022-09-22 13:37:42 -07:00
committed by GitHub
parent fe655f4ef1
commit da45d327c7
1 changed files with 8 additions and 3 deletions
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src/core/border_router/routing_manager.cpp
+8 -3
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@@ -810,14 +810,19 @@ bool RoutingManager::IsReceivedRouterAdvertFromManager(const Ip6::Nd::RouterAdve
{ {
case Ip6::Nd::Option::kTypePrefixInfo: case Ip6::Nd::Option::kTypePrefixInfo:
{ {
// PIO should match `mLocalOnLinkPrefix`.
const Ip6::Nd::PrefixInfoOption &pio = static_cast<const Ip6::Nd::PrefixInfoOption &>(option); const Ip6::Nd::PrefixInfoOption &pio = static_cast<const Ip6::Nd::PrefixInfoOption &>(option);
VerifyOrExit(pio.IsValid()); VerifyOrExit(pio.IsValid());
pio.GetPrefix(prefix); pio.GetPrefix(prefix);
VerifyOrExit(prefix == mLocalOnLinkPrefix.GetPrefix()); // If it is a non-deprecated PIO, it should match the
// local on-link prefix.
if (pio.GetPreferredLifetime() > 0)
{
VerifyOrExit(prefix == mLocalOnLinkPrefix.GetPrefix());
}
break; break;
} }