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Temporarily blacklist he.net IPv6 tunnel addresses for paths: these usually have a very low MTU which causes packet loss and other issues.

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This commit is contained in:
Adam Ierymenko 2016-02-10 11:06:26 -08:00
parent 10bb9919f1
commit 82348e1537
1 changed files with 8 additions and 0 deletions
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8
node/Path.hpp
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@ -243,6 +243,14 @@ public:
case InetAddress::IP_SCOPE_PSEUDOPRIVATE:
case InetAddress::IP_SCOPE_SHARED:
case InetAddress::IP_SCOPE_GLOBAL:
if (a.ss_family == AF_INET6) {
// TEMPORARY HACK: for now, we are going to blacklist he.net IPv6
// tunnels due to very spotty performance and low MTU issues over
// these IPv6 tunnel links.
const uint8_t *ipd = reinterpret_cast<const uint8_t *>(reinterpret_cast<const struct sockaddr_in6 *>(&a)->sin6_addr.s6_addr);
if ((ipd[0] == 0x20)&&(ipd[1] == 0x01)&&(ipd[2] == 0x04)&&(ipd[3] == 0x70))
return false;
}
return true;
default:
return false;