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Feature: support relay UDP traffic

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This commit is contained in:
yaling888
2022-05-22 05:32:15 +08:00
parent 622b10d34d
commit ce1014eae3
15 changed files with 414 additions and 86 deletions
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21
adapter/outbound/snell.go
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@ -58,6 +58,18 @@ func (s *Snell) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
return c, err
}
// StreamPacketConn implements C.ProxyAdapter
func (s *Snell) StreamPacketConn(c net.Conn, _ *C.Metadata) (net.Conn, error) {
c = streamConn(c, streamOption{s.psk, s.version, s.addr, s.obfsOption})
err := snell.WriteUDPHeader(c, s.version)
if err != nil {
return c, err
}
return WrapConn(snell.PacketConn(c)), nil
}
// DialContext implements C.ProxyAdapter
func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
if s.version == snell.Version2 && len(opts) == 0 {
@ -68,7 +80,7 @@ func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata, opts ...d
port, _ := strconv.ParseUint(metadata.DstPort, 10, 16)
if err = snell.WriteHeader(c, metadata.String(), uint(port), s.version); err != nil {
c.Close()
_ = c.Close()
return nil, err
}
return NewConn(c, s), err
@ -93,15 +105,14 @@ func (s *Snell) ListenPacketContext(ctx context.Context, metadata *C.Metadata, o
return nil, err
}
tcpKeepAlive(c)
c = streamConn(c, streamOption{s.psk, s.version, s.addr, s.obfsOption})
err = snell.WriteUDPHeader(c, s.version)
pc, err := s.StreamPacketConn(c, metadata)
if err != nil {
_ = c.Close()
return nil, err
}
pc := snell.PacketConn(c)
return newPacketConn(pc, s), nil
return NewPacketConn(pc.(net.PacketConn), s), nil
}
func NewSnell(option SnellOption) (*Snell, error) {