mirror of
https://github.com/MetaCubeX/mihomo.git
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168 lines
3.6 KiB
Go
168 lines
3.6 KiB
Go
package adapters
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import (
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"crypto/tls"
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"fmt"
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"io"
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"io/ioutil"
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"net"
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"strconv"
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"github.com/Dreamacro/clash/component/socks5"
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C "github.com/Dreamacro/clash/constant"
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)
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type Socks5 struct {
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*Base
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addr string
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user string
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pass string
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tls bool
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skipCertVerify bool
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tlsConfig *tls.Config
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}
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type Socks5Option struct {
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Name string `proxy:"name"`
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Server string `proxy:"server"`
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Port int `proxy:"port"`
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UserName string `proxy:"username,omitempty"`
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Password string `proxy:"password,omitempty"`
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TLS bool `proxy:"tls,omitempty"`
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UDP bool `proxy:"udp,omitempty"`
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SkipCertVerify bool `proxy:"skip-cert-verify,omitempty"`
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}
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func (ss *Socks5) Dial(metadata *C.Metadata) (net.Conn, error) {
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c, err := dialTimeout("tcp", ss.addr, tcpTimeout)
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if err == nil && ss.tls {
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cc := tls.Client(c, ss.tlsConfig)
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err = cc.Handshake()
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c = cc
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}
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if err != nil {
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return nil, fmt.Errorf("%s connect error", ss.addr)
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}
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tcpKeepAlive(c)
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var user *socks5.User
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if ss.user != "" {
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user = &socks5.User{
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Username: ss.user,
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Password: ss.pass,
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}
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}
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if _, err := socks5.ClientHandshake(c, serializesSocksAddr(metadata), socks5.CmdConnect, user); err != nil {
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return nil, err
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}
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return c, nil
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}
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func (ss *Socks5) DialUDP(metadata *C.Metadata) (_ net.PacketConn, _ net.Addr, err error) {
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c, err := dialTimeout("tcp", ss.addr, tcpTimeout)
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if err != nil {
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err = fmt.Errorf("%s connect error", ss.addr)
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return
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}
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if ss.tls {
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cc := tls.Client(c, ss.tlsConfig)
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err = cc.Handshake()
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c = cc
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}
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defer func() {
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if err != nil {
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c.Close()
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}
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}()
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tcpKeepAlive(c)
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var user *socks5.User
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if ss.user != "" {
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user = &socks5.User{
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Username: ss.user,
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Password: ss.pass,
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}
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}
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bindAddr, err := socks5.ClientHandshake(c, serializesSocksAddr(metadata), socks5.CmdUDPAssociate, user)
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if err != nil {
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err = fmt.Errorf("%v client hanshake error", err)
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return
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}
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addr, err := net.ResolveUDPAddr("udp", bindAddr.String())
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if err != nil {
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return
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}
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targetAddr, err := net.ResolveUDPAddr("udp", net.JoinHostPort(metadata.String(), metadata.DstPort))
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if err != nil {
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return
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}
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pc, err := net.ListenPacket("udp", "")
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if err != nil {
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return
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}
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go func() {
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io.Copy(ioutil.Discard, c)
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c.Close()
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// A UDP association terminates when the TCP connection that the UDP
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// ASSOCIATE request arrived on terminates. RFC1928
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pc.Close()
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}()
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return &socksUDPConn{PacketConn: pc, rAddr: targetAddr}, addr, nil
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}
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func NewSocks5(option Socks5Option) *Socks5 {
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var tlsConfig *tls.Config
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if option.TLS {
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tlsConfig = &tls.Config{
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InsecureSkipVerify: option.SkipCertVerify,
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ClientSessionCache: getClientSessionCache(),
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ServerName: option.Server,
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}
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}
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return &Socks5{
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Base: &Base{
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name: option.Name,
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tp: C.Socks5,
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udp: option.UDP,
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},
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addr: net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
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user: option.UserName,
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pass: option.Password,
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tls: option.TLS,
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skipCertVerify: option.SkipCertVerify,
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tlsConfig: tlsConfig,
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}
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}
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type socksUDPConn struct {
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net.PacketConn
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rAddr net.Addr
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}
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func (uc *socksUDPConn) WriteTo(b []byte, addr net.Addr) (n int, err error) {
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packet, err := socks5.EncodeUDPPacket(uc.rAddr.String(), b)
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if err != nil {
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return
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}
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return uc.PacketConn.WriteTo(packet, addr)
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}
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func (uc *socksUDPConn) ReadFrom(b []byte) (int, net.Addr, error) {
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n, a, e := uc.PacketConn.ReadFrom(b)
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addr, payload, err := socks5.DecodeUDPPacket(b)
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if err != nil {
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return 0, nil, err
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}
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copy(b, payload)
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return n - len(addr) - 3, a, e
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}
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