mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-07-07 05:44:28 -04:00
60 lines
1.4 KiB
Go
60 lines
1.4 KiB
Go
package protocol
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"errors"
|
|
|
|
"github.com/v2ray/v2ray-core/common/log"
|
|
v2net "github.com/v2ray/v2ray-core/common/net"
|
|
)
|
|
|
|
var (
|
|
ErrorUnknownAddressType = errors.New("Unknown Address Type.")
|
|
)
|
|
|
|
type Socks5UDPRequest struct {
|
|
Fragment byte
|
|
Address v2net.Address
|
|
Data []byte
|
|
}
|
|
|
|
func (request *Socks5UDPRequest) Destination() v2net.Destination {
|
|
return v2net.NewUDPDestination(request.Address)
|
|
}
|
|
|
|
func ReadUDPRequest(packet []byte) (request Socks5UDPRequest, err error) {
|
|
// packet[0] and packet[1] are reserved
|
|
request.Fragment = packet[2]
|
|
|
|
addrType := packet[3]
|
|
var dataBegin int
|
|
|
|
switch addrType {
|
|
case AddrTypeIPv4:
|
|
ip := packet[4:8]
|
|
port := binary.BigEndian.Uint16(packet[8:10])
|
|
request.Address = v2net.IPAddress(ip, port)
|
|
dataBegin = 10
|
|
case AddrTypeIPv6:
|
|
ip := packet[4:20]
|
|
port := binary.BigEndian.Uint16(packet[20:22])
|
|
request.Address = v2net.IPAddress(ip, port)
|
|
dataBegin = 22
|
|
case AddrTypeDomain:
|
|
domainLength := int(packet[4])
|
|
domain := string(packet[5 : 5+domainLength])
|
|
port := binary.BigEndian.Uint16(packet[5+domainLength : 5+domainLength+2])
|
|
request.Address = v2net.DomainAddress(domain, port)
|
|
dataBegin = 5 + domainLength + 2
|
|
default:
|
|
log.Warning("Unknown address type %d", addrType)
|
|
err = ErrorUnknownAddressType
|
|
return
|
|
}
|
|
|
|
request.Data = make([]byte, len(packet)-dataBegin)
|
|
copy(request.Data, packet[dataBegin:])
|
|
|
|
return
|
|
}
|