add pkgs from core

2022-04-04 12:44:35 +08:00
parent 7eb3687e0e
commit a3346ad246
188 changed files with 6084 additions and 283 deletions
--- a/connector/socks/v5/connector.go
+++ b/connector/socks/v5/connector.go
@ -0,0 +1,173 @@
+package v5
+
+import (
+	"context"
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"net"
+	"time"
+
+	"github.com/go-gost/core/connector"
+	"github.com/go-gost/core/logger"
+	md "github.com/go-gost/core/metadata"
+	"github.com/go-gost/gosocks5"
+	"github.com/go-gost/x/internal/util/socks"
+	"github.com/go-gost/x/registry"
+)
+
+func init() {
+	registry.ConnectorRegistry().Register("socks5", NewConnector)
+	registry.ConnectorRegistry().Register("socks", NewConnector)
+}
+
+type socks5Connector struct {
+	selector gosocks5.Selector
+	md       metadata
+	options  connector.Options
+}
+
+func NewConnector(opts ...connector.Option) connector.Connector {
+	options := connector.Options{}
+	for _, opt := range opts {
+		opt(&options)
+	}
+
+	return &socks5Connector{
+		options: options,
+	}
+}
+
+func (c *socks5Connector) Init(md md.Metadata) (err error) {
+	if err = c.parseMetadata(md); err != nil {
+		return
+	}
+
+	selector := &clientSelector{
+		methods: []uint8{
+			gosocks5.MethodNoAuth,
+			gosocks5.MethodUserPass,
+		},
+		User:      c.options.Auth,
+		TLSConfig: c.options.TLSConfig,
+		logger:    c.options.Logger,
+	}
+	if !c.md.noTLS {
+		selector.methods = append(selector.methods, socks.MethodTLS)
+		if selector.TLSConfig == nil {
+			selector.TLSConfig = &tls.Config{
+				InsecureSkipVerify: true,
+			}
+		}
+	}
+	c.selector = selector
+
+	return
+}
+
+// Handshake implements connector.Handshaker.
+func (c *socks5Connector) Handshake(ctx context.Context, conn net.Conn) (net.Conn, error) {
+	log := c.options.Logger.WithFields(map[string]any{
+		"remote": conn.RemoteAddr().String(),
+		"local":  conn.LocalAddr().String(),
+	})
+
+	if c.md.connectTimeout > 0 {
+		conn.SetDeadline(time.Now().Add(c.md.connectTimeout))
+		defer conn.SetDeadline(time.Time{})
+	}
+
+	cc := gosocks5.ClientConn(conn, c.selector)
+	if err := cc.Handleshake(); err != nil {
+		log.Error(err)
+		return nil, err
+	}
+
+	return cc, nil
+}
+
+func (c *socks5Connector) Connect(ctx context.Context, conn net.Conn, network, address string, opts ...connector.ConnectOption) (net.Conn, error) {
+	log := c.options.Logger.WithFields(map[string]any{
+		"remote":  conn.RemoteAddr().String(),
+		"local":   conn.LocalAddr().String(),
+		"network": network,
+		"address": address,
+	})
+	log.Infof("connect %s/%s", address, network)
+
+	if c.md.connectTimeout > 0 {
+		conn.SetDeadline(time.Now().Add(c.md.connectTimeout))
+		defer conn.SetDeadline(time.Time{})
+	}
+
+	switch network {
+	case "udp", "udp4", "udp6":
+		return c.connectUDP(ctx, conn, network, address, log)
+	case "tcp", "tcp4", "tcp6":
+		if _, ok := conn.(net.PacketConn); ok {
+			err := fmt.Errorf("tcp over udp is unsupported")
+			log.Error(err)
+			return nil, err
+		}
+	default:
+		err := fmt.Errorf("network %s is unsupported", network)
+		log.Error(err)
+		return nil, err
+	}
+
+	addr := gosocks5.Addr{}
+	if err := addr.ParseFrom(address); err != nil {
+		log.Error(err)
+		return nil, err
+	}
+
+	req := gosocks5.NewRequest(gosocks5.CmdConnect, &addr)
+	if err := req.Write(conn); err != nil {
+		log.Error(err)
+		return nil, err
+	}
+	log.Debug(req)
+
+	reply, err := gosocks5.ReadReply(conn)
+	if err != nil {
+		log.Error(err)
+		return nil, err
+	}
+	log.Debug(reply)
+
+	if reply.Rep != gosocks5.Succeeded {
+		err = errors.New("host unreachable")
+		log.Error(err)
+		return nil, err
+	}
+
+	return conn, nil
+}
+
+func (c *socks5Connector) connectUDP(ctx context.Context, conn net.Conn, network, address string, log logger.Logger) (net.Conn, error) {
+	addr, err := net.ResolveUDPAddr(network, address)
+	if err != nil {
+		log.Error(err)
+		return nil, err
+	}
+
+	req := gosocks5.NewRequest(socks.CmdUDPTun, nil)
+	if err := req.Write(conn); err != nil {
+		log.Error(err)
+		return nil, err
+	}
+	log.Debug(req)
+
+	reply, err := gosocks5.ReadReply(conn)
+	if err != nil {
+		log.Error(err)
+		return nil, err
+	}
+	log.Debug(reply)
+
+	if reply.Rep != gosocks5.Succeeded {
+		return nil, errors.New("get socks5 UDP tunnel failure")
+	}
+
+	return socks.UDPTunClientConn(conn, addr), nil
+}