147 lines
3.1 KiB
Go
147 lines
3.1 KiB
Go
package v5
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import (
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"context"
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"crypto/tls"
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"errors"
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"net"
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"net/url"
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"strings"
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"time"
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"github.com/go-gost/gosocks5"
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"github.com/go-gost/gost/pkg/connector"
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"github.com/go-gost/gost/pkg/internal/utils/socks"
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"github.com/go-gost/gost/pkg/logger"
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md "github.com/go-gost/gost/pkg/metadata"
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"github.com/go-gost/gost/pkg/registry"
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)
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func init() {
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registry.RegiserConnector("socks5", NewConnector)
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registry.RegiserConnector("socks", NewConnector)
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}
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type socks5Connector struct {
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selector gosocks5.Selector
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logger logger.Logger
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md metadata
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}
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func NewConnector(opts ...connector.Option) connector.Connector {
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options := &connector.Options{}
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for _, opt := range opts {
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opt(options)
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}
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return &socks5Connector{
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logger: options.Logger,
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}
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}
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func (c *socks5Connector) Init(md md.Metadata) (err error) {
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if err = c.parseMetadata(md); err != nil {
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return
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}
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selector := &clientSelector{
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methods: []uint8{
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gosocks5.MethodNoAuth,
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gosocks5.MethodUserPass,
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},
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logger: c.logger,
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User: c.md.User,
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TLSConfig: c.md.tlsConfig,
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}
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if !c.md.noTLS {
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selector.methods = append(selector.methods, socks.MethodTLS)
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if selector.TLSConfig == nil {
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selector.TLSConfig = &tls.Config{
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InsecureSkipVerify: true,
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}
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}
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}
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c.selector = selector
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return
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}
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func (c *socks5Connector) Handshake(ctx context.Context, conn net.Conn) (net.Conn, error) {
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c.logger = c.logger.WithFields(map[string]interface{}{
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"remote": conn.RemoteAddr().String(),
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"local": conn.LocalAddr().String(),
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})
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if c.md.connectTimeout > 0 {
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conn.SetDeadline(time.Now().Add(c.md.connectTimeout))
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defer conn.SetDeadline(time.Time{})
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}
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cc := gosocks5.ClientConn(conn, c.selector)
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if err := cc.Handleshake(); err != nil {
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return nil, err
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}
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return cc, nil
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}
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func (c *socks5Connector) Connect(ctx context.Context, conn net.Conn, network, address string, opts ...connector.ConnectOption) (net.Conn, error) {
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c.logger = c.logger.WithFields(map[string]interface{}{
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"target": address,
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})
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c.logger.Info("connect: ", address)
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addr, err := gosocks5.NewAddr(address)
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if err != nil {
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c.logger.Error(err)
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return nil, err
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}
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if c.md.connectTimeout > 0 {
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conn.SetDeadline(time.Now().Add(c.md.connectTimeout))
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defer conn.SetDeadline(time.Time{})
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}
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req := gosocks5.NewRequest(gosocks5.CmdConnect, addr)
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if err := req.Write(conn); err != nil {
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c.logger.Error(err)
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return nil, err
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}
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if c.logger.IsLevelEnabled(logger.DebugLevel) {
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c.logger.Debug(req)
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}
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reply, err := gosocks5.ReadReply(conn)
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if err != nil {
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c.logger.Error(err)
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return nil, err
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}
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if c.logger.IsLevelEnabled(logger.DebugLevel) {
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c.logger.Debug(reply)
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}
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if reply.Rep != gosocks5.Succeeded {
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return nil, errors.New("service unavailable")
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}
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return conn, nil
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}
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func (c *socks5Connector) parseMetadata(md md.Metadata) (err error) {
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if v := md.GetString(auth); v != "" {
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ss := strings.SplitN(v, ":", 2)
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if len(ss) == 1 {
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c.md.User = url.User(ss[0])
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} else {
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c.md.User = url.UserPassword(ss[0], ss[1])
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}
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}
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c.md.connectTimeout = md.GetDuration(connectTimeout)
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c.md.noTLS = md.GetBool(noTLS)
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return
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}
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