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