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feat: add queryStrategy option for DNS

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This commit is contained in:
AkinoKaede
2021-03-19 23:33:07 +08:00
parent 41d3f31447
commit 8382b29922
16 changed files with 419 additions and 267 deletions
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23
transport/internet/system_dialer.go
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@ -63,30 +63,27 @@ func (d *DefaultSystemDialer) lookupIP(domain string, strategy DomainStrategy, l
return nil, nil
}
var option = dns.IPOption{
IPv4Enable: true,
IPv6Enable: true,
FakeEnable: false,
if c, ok := d.dns.(dns.ClientWithIPOption); ok {
c.SetFakeDNSOption(false) // Skip FakeDNS
} else {
newError("DNS client doesn't implement ClientWithIPOption")
}
var lookupFunc func(string) ([]net.IP, error) = d.dns.LookupIP
switch {
case strategy == DomainStrategy_USE_IP4 || (localAddr != nil && localAddr.Family().IsIPv4()):
option = dns.IPOption{
IPv4Enable: true,
IPv6Enable: false,
FakeEnable: false,
if lookupIPv4, ok := d.dns.(dns.IPv4Lookup); ok {
lookupFunc = lookupIPv4.LookupIPv4
}
case strategy == DomainStrategy_USE_IP6 || (localAddr != nil && localAddr.Family().IsIPv6()):
option = dns.IPOption{
IPv4Enable: false,
IPv6Enable: true,
FakeEnable: false,
if lookupIPv6, ok := d.dns.(dns.IPv6Lookup); ok {
lookupFunc = lookupIPv6.LookupIPv6
}
case strategy == DomainStrategy_AS_IS:
return nil, nil
}
return d.dns.LookupIP(domain, option)
return lookupFunc(domain)
}
func (d *DefaultSystemDialer) doLookupIP(ctx context.Context, dst net.Destination, sockopt *SocketConfig) bool {