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[border-router] send at least one router solicitation (#6280)

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kangping
2021-03-16 08:37:02 -07:00
committed by GitHub
parent 762c3c4d1e
commit 818a774bcf
1 changed files with 8 additions and 2 deletions
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src/core/border_router/routing_manager.cpp
+8 -2
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@@ -1145,12 +1145,18 @@ bool RoutingManager::AddDiscoveredPrefix(const Ip6::Prefix &aPrefix,
SuccessOrExit(AddExternalRoute(aPrefix, aRoutePreference));
if (aIsOnLinkPrefix)
if (aIsOnLinkPrefix && mRouterSolicitCount > 0)
{
// Stop Router Solicitation if we discovered a valid on-link prefix.
// Otherwise, we wait till the Router Solicitation process times out.
// So the maximum delay before the Border Router starts advertising
// its own on-link prefix is 9 (4 + 4 + 1) seconds.
// its own on-link prefix is 10 seconds = RS_DELAY (1) + RS_INTERNAL (4)
// + RS_INTERVAL (4) + RS_DELAY (1).
//
// Always send at least one RS message so that all BRs will respond.
// Consider that there are multiple BRs on the infra link, we may not learn
// RIOs of other BRs if the router discovery process is stopped immediately
// before sending any RS messages because of receiving an unsolicited RA.
mRouterSolicitTimer.Stop();
}