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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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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) dnsName := dns.Fqdn(domain)
if strategy == C.DomainStrategyIPv4Only { if strategy == C.DomainStrategyIPv4Only {
response, err := c.questionCache(dns.Question{ addresses, err := c.questionCache(dns.Question{
Name: dnsName, Name: dnsName,
Qtype: dns.TypeA, Qtype: dns.TypeA,
Qclass: dns.ClassINET, Qclass: dns.ClassINET,
}, nil) }, nil)
if err != ErrNotCached { if err != ErrNotCached {
return response, true return addresses, true
} }
} else if strategy == C.DomainStrategyIPv6Only { } else if strategy == C.DomainStrategyIPv6Only {
response, err := c.questionCache(dns.Question{ addresses, err := c.questionCache(dns.Question{
Name: dnsName, Name: dnsName,
Qtype: dns.TypeAAAA, Qtype: dns.TypeAAAA,
Qclass: dns.ClassINET, Qclass: dns.ClassINET,
}, nil) }, nil)
if err != ErrNotCached { if err != ErrNotCached {
return response, true return addresses, true
} }
} else { } else {
response4, _ := c.questionCache(dns.Question{ response4, _ := c.loadResponse(dns.Question{
Name: dnsName, Name: dnsName,
Qtype: dns.TypeA, Qtype: dns.TypeA,
Qclass: dns.ClassINET, Qclass: dns.ClassINET,
}, nil) }, nil)
response6, _ := c.questionCache(dns.Question{ response6, _ := c.loadResponse(dns.Question{
Name: dnsName, Name: dnsName,
Qtype: dns.TypeAAAA, Qtype: dns.TypeAAAA,
Qclass: dns.ClassINET, Qclass: dns.ClassINET,
}, nil) }, nil)
if len(response4) > 0 || len(response6) > 0 { if response4 != nil || response6 != nil {
return sortAddresses(response4, response6, strategy), true return sortAddresses(MessageToAddresses(response4), MessageToAddresses(response6), strategy), true
} }
} }
return nil, false return nil, false
@ -517,6 +517,9 @@ func (c *Client) loadResponse(question dns.Question, transport adapter.DNSTransp
} }
func MessageToAddresses(response *dns.Msg) []netip.Addr { func MessageToAddresses(response *dns.Msg) []netip.Addr {
if response.Rcode != dns.RcodeSuccess {
return nil
}
addresses := make([]netip.Addr, 0, len(response.Answer)) addresses := make([]netip.Addr, 0, len(response.Answer))
for _, rawAnswer := range response.Answer { for _, rawAnswer := range response.Answer {
switch answer := rawAnswer.(type) { switch answer := rawAnswer.(type) {