Xray-core/transport/internet/udp/hub_freebsd.go

47 lines
1.2 KiB
Go

//go:build freebsd
// +build freebsd
package udp
import (
"bytes"
"encoding/gob"
"io"
"github.com/xtls/xray-core/common/errors"
"github.com/xtls/xray-core/common/net"
"github.com/xtls/xray-core/transport/internet"
)
// RetrieveOriginalDest from stored laddr, caddr
func RetrieveOriginalDest(oob []byte) net.Destination {
dec := gob.NewDecoder(bytes.NewBuffer(oob))
var la, ra net.UDPAddr
dec.Decode(&la)
dec.Decode(&ra)
ip, port, err := internet.OriginalDst(&la, &ra)
if err != nil {
return net.Destination{}
}
return net.UDPDestination(net.IPAddress(ip), net.Port(port))
}
// ReadUDPMsg stores laddr, caddr for later use
func ReadUDPMsg(conn *net.UDPConn, payload []byte, oob []byte) (int, int, int, *net.UDPAddr, error) {
nBytes, addr, err := conn.ReadFromUDP(payload)
var buf bytes.Buffer
enc := gob.NewEncoder(&buf)
udpAddr, ok := conn.LocalAddr().(*net.UDPAddr)
if !ok {
return 0, 0, 0, nil, errors.New("invalid local address")
}
if addr == nil {
return 0, 0, 0, nil, errors.New("invalid remote address")
}
enc.Encode(udpAddr)
enc.Encode(addr)
var reader io.Reader = &buf
noob, _ := reader.Read(oob)
return nBytes, noob, 0, addr, err
}