96 lines
2 KiB
Go
96 lines
2 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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cipher string
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password string
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}
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func (ss *ShadowSocks) Generator(addr *C.Addr) (adapter C.ProxyAdapter, err error) {
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var key []byte
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ciph, _ := core.PickCipher(ss.cipher, key, ss.password)
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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 = ciph.StreamConn(c)
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_, err = c.Write(serializesSocksAddr(addr))
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return &ShadowsocksAdapter{conn: c}, err
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}
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func NewShadowSocks(ssURL string) *ShadowSocks {
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server, cipher, password, _ := parseURL(ssURL)
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return &ShadowSocks{
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server: server,
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cipher: cipher,
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password: password,
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}
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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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