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117 lines
2.7 KiB
Go
117 lines
2.7 KiB
Go
package adapters
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import (
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"bytes"
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"fmt"
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"net"
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"strconv"
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"github.com/Dreamacro/clash/component/simple-obfs"
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C "github.com/Dreamacro/clash/constant"
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"github.com/Dreamacro/go-shadowsocks2/core"
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"github.com/Dreamacro/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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// 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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obfs string
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obfsHost string
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cipher core.Cipher
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}
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type ShadowSocksOption 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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Password string `proxy:"password"`
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Cipher string `proxy:"cipher"`
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Obfs string `proxy:"obfs,omitempty"`
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ObfsHost string `proxy:"obfs-host,omitempty"`
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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) Type() C.AdapterType {
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return C.Shadowsocks
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}
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func (ss *ShadowSocks) Generator(metadata *C.Metadata) (adapter C.ProxyAdapter, err error) {
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c, err := net.DialTimeout("tcp", ss.server, tcpTimeout)
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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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tcpKeepAlive(c)
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switch ss.obfs {
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case "tls":
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c = obfs.NewTLSObfs(c, ss.obfsHost)
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case "http":
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_, port, _ := net.SplitHostPort(ss.server)
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c = obfs.NewHTTPObfs(c, ss.obfsHost, port)
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}
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c = ss.cipher.StreamConn(c)
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_, err = c.Write(serializesSocksAddr(metadata))
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return &ShadowsocksAdapter{conn: c}, err
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}
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func NewShadowSocks(option ShadowSocksOption) (*ShadowSocks, error) {
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server := fmt.Sprintf("%s:%d", option.Server, option.Port)
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cipher := option.Cipher
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password := option.Password
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ciph, err := core.PickCipher(cipher, nil, 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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obfs := option.Obfs
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obfsHost := "bing.com"
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if option.ObfsHost != "" {
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obfsHost = option.ObfsHost
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}
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return &ShadowSocks{
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server: server,
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name: option.Name,
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cipher: ciph,
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obfs: obfs,
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obfsHost: obfsHost,
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}, nil
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}
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func serializesSocksAddr(metadata *C.Metadata) []byte {
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var buf [][]byte
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aType := uint8(metadata.AddrType)
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p, _ := strconv.Atoi(metadata.Port)
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port := []byte{uint8(p >> 8), uint8(p & 0xff)}
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switch metadata.AddrType {
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case socks.AtypDomainName:
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len := uint8(len(metadata.Host))
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host := []byte(metadata.Host)
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buf = [][]byte{{aType, len}, host, port}
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case socks.AtypIPv4:
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host := metadata.IP.To4()
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buf = [][]byte{{aType}, host, port}
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case socks.AtypIPv6:
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host := metadata.IP.To16()
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buf = [][]byte{{aType}, host, port}
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}
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return bytes.Join(buf, nil)
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}
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