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DNS: Use cache for NXDOMAIN (rcode 3 error) (#4560)

Browse Source 
https://github.com/XTLS/Xray-core/pull/4558#issuecomment-2759007356
This commit is contained in:
patterniha 2025-03-29 17:35:27 +03:30 committed by RPRX
parent 681e943848
commit 1685c61e44
4 changed files with 4 additions and 4 deletions
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2
app/dns/nameserver_doh.go
View File

@ -357,7 +357,7 @@ func (s *DoHNameServer) QueryIP(ctx context.Context, domain string, clientIP net
errors.LogDebug(ctx, "DNS cache is disabled. Querying IP for ", domain, " at ", s.name)
} else {
ips, ttl, err := s.findIPsForDomain(fqdn, option)
if err == nil || err == dns_feature.ErrEmptyResponse {
if err == nil || err == dns_feature.ErrEmptyResponse || dns_feature.RCodeFromError(err) == 3 {
errors.LogDebugInner(ctx, err, s.name, " cache HIT ", domain, " -> ", ips)
log.Record(&log.DNSLog{Server: s.name, Domain: domain, Result: ips, Status: log.DNSCacheHit, Elapsed: 0, Error: err})
return ips, ttl, err

2
app/dns/nameserver_quic.go
View File

@ -300,7 +300,7 @@ func (s *QUICNameServer) QueryIP(ctx context.Context, domain string, clientIP ne
errors.LogDebug(ctx, "DNS cache is disabled. Querying IP for ", domain, " at ", s.name)
} else {
ips, ttl, err := s.findIPsForDomain(fqdn, option)
if err == nil || err == dns_feature.ErrEmptyResponse {
if err == nil || err == dns_feature.ErrEmptyResponse || dns_feature.RCodeFromError(err) == 3 {
errors.LogDebugInner(ctx, err, s.name, " cache HIT ", domain, " -> ", ips)
log.Record(&log.DNSLog{Server: s.name, Domain: domain, Result: ips, Status: log.DNSCacheHit, Elapsed: 0, Error: err})
return ips, ttl, err

2
app/dns/nameserver_tcp.go
View File

@ -325,7 +325,7 @@ func (s *TCPNameServer) QueryIP(ctx context.Context, domain string, clientIP net
errors.LogDebug(ctx, "DNS cache is disabled. Querying IP for ", domain, " at ", s.name)
} else {
ips, ttl, err := s.findIPsForDomain(fqdn, option)
if err == nil || err == dns_feature.ErrEmptyResponse {
if err == nil || err == dns_feature.ErrEmptyResponse || dns_feature.RCodeFromError(err) == 3 {
errors.LogDebugInner(ctx, err, s.name, " cache HIT ", domain, " -> ", ips)
log.Record(&log.DNSLog{Server: s.name, Domain: domain, Result: ips, Status: log.DNSCacheHit, Elapsed: 0, Error: err})
return ips, ttl, err

2
app/dns/nameserver_udp.go
View File

@ -282,7 +282,7 @@ func (s *ClassicNameServer) QueryIP(ctx context.Context, domain string, clientIP
errors.LogDebug(ctx, "DNS cache is disabled. Querying IP for ", domain, " at ", s.name)
} else {
ips, ttl, err := s.findIPsForDomain(fqdn, option)
if err == nil || err == dns_feature.ErrEmptyResponse {
if err == nil || err == dns_feature.ErrEmptyResponse || dns_feature.RCodeFromError(err) == 3 {
errors.LogDebugInner(ctx, err, s.name, " cache HIT ", domain, " -> ", ips)
log.Record(&log.DNSLog{Server: s.name, Domain: domain, Result: ips, Status: log.DNSCacheHit, Elapsed: 0, Error: err})
return ips, ttl, err