mirror of
https://github.com/XTLS/Xray-core.git
synced 2024-07-05 17:39:20 +03:00
47 lines
1.2 KiB
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
|
|
}
|