mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-12-22 10:08:15 -05:00
60 lines
1.4 KiB
Go
60 lines
1.4 KiB
Go
package protocol
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import (
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"encoding/binary"
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"errors"
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"github.com/v2ray/v2ray-core/common/log"
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v2net "github.com/v2ray/v2ray-core/common/net"
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)
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var (
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ErrorUnknownAddressType = errors.New("Unknown Address Type.")
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)
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type Socks5UDPRequest struct {
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Fragment byte
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Address v2net.Address
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Data []byte
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}
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func (request *Socks5UDPRequest) Destination() v2net.Destination {
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return v2net.NewUDPDestination(request.Address)
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}
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func ReadUDPRequest(packet []byte) (request Socks5UDPRequest, err error) {
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// packet[0] and packet[1] are reserved
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request.Fragment = packet[2]
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addrType := packet[3]
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var dataBegin int
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switch addrType {
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case AddrTypeIPv4:
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ip := packet[4:8]
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port := binary.BigEndian.Uint16(packet[8:10])
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request.Address = v2net.IPAddress(ip, port)
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dataBegin = 10
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case AddrTypeIPv6:
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ip := packet[4:20]
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port := binary.BigEndian.Uint16(packet[20:22])
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request.Address = v2net.IPAddress(ip, port)
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dataBegin = 22
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case AddrTypeDomain:
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domainLength := int(packet[4])
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domain := string(packet[5 : 5+domainLength])
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port := binary.BigEndian.Uint16(packet[5+domainLength : 5+domainLength+2])
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request.Address = v2net.DomainAddress(domain, port)
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dataBegin = 5 + domainLength + 2
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default:
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log.Warning("Unknown address type %d", addrType)
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err = ErrorUnknownAddressType
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return
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}
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request.Data = make([]byte, len(packet)-dataBegin)
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copy(request.Data, packet[dataBegin:])
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return
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}
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