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Use ipv4only.arpa to detect NAT64 prefix (RFC 7050)

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This commit is contained in:
Benau 2020-02-02 00:13:25 +08:00
parent 4ad7e585f8
commit ecb31ad217
1 changed files with 3 additions and 7 deletions
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10
src/network/network_config.cpp
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@ -273,13 +273,9 @@ void NetworkConfig::detectIPType()
// to IPv4 only servers
if (!has_ipv4)
{
// Detect NAT64 prefix by using the IPv4 only stun:
// All IPv4 only stun servers are *.supertuxkart.net which only
// have A record, so the below code which forces to get an AF_INET6
// will return their NAT64 addresses
SocketAddress nat64(ipv4_it->first, 0/*port specified in addr*/,
AF_INET6);
if (!nat64.isUnset() && nat64.getFamily() == AF_INET6)
// Detect NAT64 prefix by using ipv4only.arpa (RFC 7050)
SocketAddress nat64("ipv4only.arpa", 0/*port*/, AF_INET6);
if (nat64.getFamily() == AF_INET6)
{
// Remove last 4 bytes which is IPv4 format
struct sockaddr_in6* in6 =