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Fix DNS cache

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世界 2025-09-05 15:20:49 +08:00
parent f352f84483
commit 531beeeed7
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GPG Key ID: CD109927C34A63C4
1 changed files with 11 additions and 8 deletions
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19
dns/client.go
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@ -320,36 +320,36 @@ func (c *Client) LookupCache(domain string, strategy C.DomainStrategy) ([]netip.
}
dnsName := dns.Fqdn(domain)
if strategy == C.DomainStrategyIPv4Only {
response, err := c.questionCache(dns.Question{
addresses, err := c.questionCache(dns.Question{
Name: dnsName,
Qtype: dns.TypeA,
Qclass: dns.ClassINET,
}, nil)
if err != ErrNotCached {
return response, true
return addresses, true
}
} else if strategy == C.DomainStrategyIPv6Only {
response, err := c.questionCache(dns.Question{
addresses, err := c.questionCache(dns.Question{
Name: dnsName,
Qtype: dns.TypeAAAA,
Qclass: dns.ClassINET,
}, nil)
if err != ErrNotCached {
return response, true
return addresses, true
}
} else {
response4, _ := c.questionCache(dns.Question{
response4, _ := c.loadResponse(dns.Question{
Name: dnsName,
Qtype: dns.TypeA,
Qclass: dns.ClassINET,
}, nil)
response6, _ := c.questionCache(dns.Question{
response6, _ := c.loadResponse(dns.Question{
Name: dnsName,
Qtype: dns.TypeAAAA,
Qclass: dns.ClassINET,
}, nil)
if len(response4) > 0 || len(response6) > 0 {
return sortAddresses(response4, response6, strategy), true
if response4 != nil || response6 != nil {
return sortAddresses(MessageToAddresses(response4), MessageToAddresses(response6), strategy), true
}
}
return nil, false
@ -517,6 +517,9 @@ func (c *Client) loadResponse(question dns.Question, transport adapter.DNSTransp
}
func MessageToAddresses(response *dns.Msg) []netip.Addr {
if response.Rcode != dns.RcodeSuccess {
return nil
}
addresses := make([]netip.Addr, 0, len(response.Answer))
for _, rawAnswer := range response.Answer {
switch answer := rawAnswer.(type) {