hesoyam/Xray-core
1
0
Fork 0
mirror of https://github.com/XTLS/Xray-core.git synced 2026-07-10 21:58:52 +00:00
Code Issues Packages Projects Releases Wiki Activity

refactor(dns): enhance cache safety, optimize performance, and refactor query logic (#5248)

Browse Source
This commit is contained in:
Meow
2025-11-21 10:45:09 +08:00
committed by GitHub
parent 27ad487545
commit b40bf56e4e
7 changed files with 454 additions and 325 deletions
Download Patch File Download Diff File Expand all files Collapse all files
app/dns/nameserver_quic.go
+11 -51
View File
@@ -4,7 +4,6 @@ import (
"bytes"
"context"
"encoding/binary"
go_errors "errors"
"net/url"
"sync"
"time"
@@ -59,7 +58,7 @@ func NewQUICNameServer(url *url.URL, disableCache bool, clientIP net.IP) (*QUICN
return s, nil
}
// Name returns client name
// Name implements Server.
func (s *QUICNameServer) Name() string {
return s.cacheController.name
}
@@ -68,10 +67,14 @@ func (s *QUICNameServer) newReqID() uint16 {
return 0
}
func (s *QUICNameServer) sendQuery(ctx context.Context, noResponseErrCh chan<- error, domain string, option dns_feature.IPOption) {
errors.LogInfo(ctx, s.Name(), " querying: ", domain)
// getCacheController implements CachedNameServer.
func (s *QUICNameServer) getCacheController() *CacheController { return s.cacheController }
reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(s.clientIP, 0))
// sendQuery implements CachedNameServer.
func (s *QUICNameServer) sendQuery(ctx context.Context, noResponseErrCh chan<- error, fqdn string, option dns_feature.IPOption) {
errors.LogInfo(ctx, s.Name(), " querying: ", fqdn)
reqs := buildReqMsgs(fqdn, option, s.newReqID, genEDNS0Options(s.clientIP, 0))
var deadline time.Time
if d, ok := ctx.Deadline(); ok {
@@ -167,57 +170,14 @@ func (s *QUICNameServer) sendQuery(ctx context.Context, noResponseErrCh chan<- e
noResponseErrCh <- err
return
}
s.cacheController.updateIP(r, rec)
s.cacheController.updateRecord(r, rec)
}(req)
}
}
// QueryIP is called from dns.Server->queryIPTimeout
// QueryIP implements Server.
func (s *QUICNameServer) QueryIP(ctx context.Context, domain string, option dns_feature.IPOption) ([]net.IP, uint32, error) {
fqdn := Fqdn(domain)
sub4, sub6 := s.cacheController.registerSubscribers(fqdn, option)
defer closeSubscribers(sub4, sub6)
if s.cacheController.disableCache {
errors.LogDebug(ctx, "DNS cache is disabled. Querying IP for ", domain, " at ", s.Name())
} else {
ips, ttl, err := s.cacheController.findIPsForDomain(fqdn, option)
if !go_errors.Is(err, errRecordNotFound) {
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
}
}
noResponseErrCh := make(chan error, 2)
s.sendQuery(ctx, noResponseErrCh, fqdn, option)
start := time.Now()
if sub4 != nil {
select {
case <-ctx.Done():
return nil, 0, ctx.Err()
case err := <-noResponseErrCh:
return nil, 0, err
case <-sub4.Wait():
sub4.Close()
}
}
if sub6 != nil {
select {
case <-ctx.Done():
return nil, 0, ctx.Err()
case err := <-noResponseErrCh:
return nil, 0, err
case <-sub6.Wait():
sub6.Close()
}
}
ips, ttl, err := s.cacheController.findIPsForDomain(fqdn, option)
log.Record(&log.DNSLog{Server: s.Name(), Domain: domain, Result: ips, Status: log.DNSQueried, Elapsed: time.Since(start), Error: err})
return ips, ttl, err
return queryIP(ctx, s, domain, option)
}
func isActive(s *quic.Conn) bool {