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Clarify logic in pinging, and prevent roots from pinging "down."

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This commit is contained in:
Adam Ierymenko 2015-10-23 14:05:12 -07:00
parent e6a63f5547
commit e9648a6cdf
1 changed files with 16 additions and 5 deletions
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21
node/Node.cpp
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@ -211,8 +211,15 @@ public:
}
}
// If this is a network preferred relay, also always ping and if a stable endpoint is specified use that if not alive
if (!upstream) {
// If I am a root server, only ping other root servers -- roots don't ping "down"
// since that would just be a waste of bandwidth and could potentially cause route
// flapping in Cluster mode.
if (RR->topology->amRoot())
return;
// Check for network preferred relays, also considered 'upstream' and thus always
// pinged to keep links up. If they have stable addresses we will try them there.
for(std::vector< std::pair<Address,InetAddress> >::const_iterator r(_relays.begin());r!=_relays.end();++r) {
if (r->first == p->address()) {
if (r->second.ss_family == AF_INET)
@ -229,18 +236,22 @@ public:
// "Upstream" devices are roots and relays and get special treatment -- they stay alive
// forever and we try to keep (if available) both IPv4 and IPv6 channels open to them.
bool needToContactIndirect = true;
if (!p->doPingAndKeepalive(RR,_now,AF_INET)) {
if (p->doPingAndKeepalive(RR,_now,AF_INET)) {
needToContactIndirect = false;
} else {
if (stableEndpoint4) {
needToContactIndirect = false;
p->attemptToContactAt(RR,InetAddress(),stableEndpoint4,_now);
}
} else needToContactIndirect = false;
if (!p->doPingAndKeepalive(RR,_now,AF_INET6)) {
}
if (p->doPingAndKeepalive(RR,_now,AF_INET6)) {
needToContactIndirect = false;
} else {
if (stableEndpoint6) {
needToContactIndirect = false;
p->attemptToContactAt(RR,InetAddress(),stableEndpoint6,_now);
}
} else needToContactIndirect = false;
}
if (needToContactIndirect) {
// If this is an upstream and we have no stable endpoint for either IPv4 or IPv6,