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Fix stream sniffer

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世界 2024-08-28 11:40:43 +08:00
parent b57abcc73c
commit 27d6b63e71
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GPG key ID: CD109927C34A63C4
2 changed files with 31 additions and 20 deletions
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49
common/sniff/sniff.go
View file

@ -18,33 +18,44 @@ type (
PacketSniffer = func(ctx context.Context, packet []byte) (*adapter.InboundContext, error) PacketSniffer = func(ctx context.Context, packet []byte) (*adapter.InboundContext, error)
) )
func Skip(metadata adapter.InboundContext) bool {
// skip server first protocols
switch metadata.Destination.Port {
case 25, 465, 587:
// SMTP
return true
case 143, 993:
// IMAP
return true
case 110, 995:
// POP3
return true
}
return false
}
func PeekStream(ctx context.Context, conn net.Conn, buffer *buf.Buffer, timeout time.Duration, sniffers ...StreamSniffer) (*adapter.InboundContext, error) { func PeekStream(ctx context.Context, conn net.Conn, buffer *buf.Buffer, timeout time.Duration, sniffers ...StreamSniffer) (*adapter.InboundContext, error) {
if timeout == 0 { if timeout == 0 {
timeout = C.ReadPayloadTimeout timeout = C.ReadPayloadTimeout
} }
deadline := time.Now().Add(timeout) deadline := time.Now().Add(timeout)
var errors []error var errors []error
err := conn.SetReadDeadline(deadline)
for i := 0; i < 3; i++ { if err != nil {
err := conn.SetReadDeadline(deadline) return nil, E.Cause(err, "set read deadline")
if err != nil { }
return nil, E.Cause(err, "set read deadline") defer conn.SetReadDeadline(time.Time{})
var metadata *adapter.InboundContext
for _, sniffer := range sniffers {
if buffer.IsEmpty() {
metadata, err = sniffer(ctx, io.TeeReader(conn, buffer))
} else {
metadata, err = sniffer(ctx, io.MultiReader(bytes.NewReader(buffer.Bytes()), io.TeeReader(conn, buffer)))
} }
_, err = buffer.ReadOnceFrom(conn) if metadata != nil {
err = E.Errors(err, conn.SetReadDeadline(time.Time{})) return metadata, nil
if err != nil {
if i > 0 {
break
}
return nil, E.Cause(err, "read payload")
}
for _, sniffer := range sniffers {
metadata, err := sniffer(ctx, bytes.NewReader(buffer.Bytes()))
if metadata != nil {
return metadata, nil
}
errors = append(errors, err)
} }
errors = append(errors, err)
} }
return nil, E.Errors(errors...) return nil, E.Errors(errors...)
} }

2
route/router.go
View file

@ -832,7 +832,7 @@ func (r *Router) RouteConnection(ctx context.Context, conn net.Conn, metadata ad
conn = deadline.NewConn(conn) conn = deadline.NewConn(conn)
} }
if metadata.InboundOptions.SniffEnabled { if metadata.InboundOptions.SniffEnabled && !sniff.Skip(metadata) {
buffer := buf.NewPacket() buffer := buf.NewPacket()
sniffMetadata, err := sniff.PeekStream(ctx, conn, buffer, time.Duration(metadata.InboundOptions.SniffTimeout), sniff.StreamDomainNameQuery, sniff.TLSClientHello, sniff.HTTPHost) sniffMetadata, err := sniff.PeekStream(ctx, conn, buffer, time.Duration(metadata.InboundOptions.SniffTimeout), sniff.StreamDomainNameQuery, sniff.TLSClientHello, sniff.HTTPHost)
if sniffMetadata != nil { if sniffMetadata != nil {