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QUIC sniffer: Full support for handling multiple initial packets (#4642)

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Co-authored-by: RPRX <63339210+RPRX@users.noreply.github.com>
Co-authored-by: Vigilans <vigilans@foxmail.com>
Co-authored-by: Shelikhoo <xiaokangwang@outlook.com>
Co-authored-by: dyhkwong <50692134+dyhkwong@users.noreply.github.com>
This commit is contained in:
j2rong4cn 2025-04-28 18:03:03 +08:00 • committed by GitHub
parent a608c5a1db
commit 58c48664e2
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GPG key ID: B5690EEEBB952194
7 changed files with 371 additions and 95 deletions
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17
common/protocol/tls/sniff.go
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@ -3,9 +3,9 @@ package tls
import (
"encoding/binary"
"errors"
"strings"
"github.com/xtls/xray-core/common"
"github.com/xtls/xray-core/common/protocol"
)
type SniffHeader struct {
@ -59,9 +59,6 @@ func ReadClientHello(data []byte, h *SniffHeader) error {
}
data = data[1+compressionMethodsLen:]
if len(data) == 0 {
return errNotClientHello
}
if len(data) < 2 {
return errNotClientHello
}
@ -104,13 +101,21 @@ func ReadClientHello(data []byte, h *SniffHeader) error {
return errNotClientHello
}
if nameType == 0 {
serverName := string(d[:nameLen])
// QUIC separated across packets
// May cause the serverName to be incomplete
b := byte(0)
for _, b = range d[:nameLen] {
if b <= ' ' {
return protocol.ErrProtoNeedMoreData
}
}
// An SNI value may not include a
// trailing dot. See
// https://tools.ietf.org/html/rfc6066#section-3.
if strings.HasSuffix(serverName, ".") {
if b == '.' {
return errNotClientHello
}
serverName := string(d[:nameLen])
h.domain = serverName
return nil
}