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drop short header packets for unknown sessions

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This commit is contained in:
Marten Seemann
2018-11-20 12:09:03 +07:00
parent 9edd783983
commit 44513a528c
4 changed files with 31 additions and 21 deletions
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18
packet_handler_map.go
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@@ -185,14 +185,18 @@ func (h *packetHandlerMap) handlePacket(addr net.Addr, data []byte) error {
handlePacket = handler.handlePacket
} else { // no session found
// this might be a stateless reset
if !iHdr.IsLongHeader && len(data) >= protocol.MinStatelessResetSize {
var token [16]byte
copy(token[:], data[len(data)-16:])
if sess, ok := h.resetTokens[token]; ok {
h.mutex.RUnlock()
sess.destroy(errors.New("received a stateless reset"))
return nil
if !iHdr.IsLongHeader {
if len(data) >= protocol.MinStatelessResetSize {
var token [16]byte
copy(token[:], data[len(data)-16:])
if sess, ok := h.resetTokens[token]; ok {
h.mutex.RUnlock()
sess.destroy(errors.New("received a stateless reset"))
return nil
}
}
// TODO(#943): send a stateless reset
return fmt.Errorf("received a short header packet with an unexpected connection ID %s", iHdr.DestConnectionID)
}
if server == nil { // no server set
h.mutex.RUnlock()