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106 lines
2.3 KiB
Go
106 lines
2.3 KiB
Go
package adapters
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import (
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"bytes"
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"fmt"
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"io"
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"net"
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"net/url"
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"strconv"
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C "github.com/Dreamacro/clash/constant"
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"github.com/riobard/go-shadowsocks2/core"
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"github.com/riobard/go-shadowsocks2/socks"
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)
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// ShadowsocksAdapter is a shadowsocks adapter
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type ShadowsocksAdapter struct {
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conn net.Conn
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}
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// ReadWriter is used to handle network traffic
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func (ss *ShadowsocksAdapter) ReadWriter() io.ReadWriter {
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return ss.conn
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}
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// Close is used to close connection
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func (ss *ShadowsocksAdapter) Close() {
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ss.conn.Close()
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}
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func (ss *ShadowsocksAdapter) Conn() net.Conn {
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return ss.conn
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}
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type ShadowSocks struct {
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server string
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name string
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cipher core.Cipher
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traffic *C.Traffic
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}
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func (ss *ShadowSocks) Name() string {
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return ss.name
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}
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func (ss *ShadowSocks) Generator(addr *C.Addr) (adapter C.ProxyAdapter, err error) {
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c, err := net.Dial("tcp", ss.server)
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if err != nil {
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return nil, fmt.Errorf("%s connect error", ss.server)
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}
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c.(*net.TCPConn).SetKeepAlive(true)
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c = ss.cipher.StreamConn(c)
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_, err = c.Write(serializesSocksAddr(addr))
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return &ShadowsocksAdapter{conn: NewTrafficTrack(c, ss.traffic)}, err
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}
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func NewShadowSocks(name string, ssURL string, traffic *C.Traffic) (*ShadowSocks, error) {
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var key []byte
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server, cipher, password, _ := parseURL(ssURL)
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ciph, err := core.PickCipher(cipher, key, password)
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if err != nil {
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return nil, fmt.Errorf("ss %s initialize error: %s", server, err.Error())
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}
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return &ShadowSocks{
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server: server,
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name: name,
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cipher: ciph,
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traffic: traffic,
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}, nil
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}
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func parseURL(s string) (addr, cipher, password string, err error) {
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u, err := url.Parse(s)
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if err != nil {
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return
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}
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addr = u.Host
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if u.User != nil {
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cipher = u.User.Username()
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password, _ = u.User.Password()
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}
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return
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}
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func serializesSocksAddr(addr *C.Addr) []byte {
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var buf [][]byte
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aType := uint8(addr.AddrType)
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p, _ := strconv.Atoi(addr.Port)
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port := []byte{uint8(p >> 8), uint8(p & 0xff)}
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switch addr.AddrType {
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case socks.AtypDomainName:
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len := uint8(len(addr.Host))
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host := []byte(addr.Host)
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buf = [][]byte{[]byte{aType, len}, host, port}
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case socks.AtypIPv4:
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host := addr.IP.To4()
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buf = [][]byte{[]byte{aType}, host, port}
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case socks.AtypIPv6:
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host := addr.IP.To16()
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buf = [][]byte{[]byte{aType}, host, port}
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}
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return bytes.Join(buf, []byte(""))
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}
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