initial commit
This commit is contained in:
ginuerzh
111
connector/ss/connector.go
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111
connector/ss/connector.go
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@ -0,0 +1,111 @@
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package ss
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import (
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"context"
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"fmt"
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"net"
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"time"
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"github.com/go-gost/gosocks5"
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"github.com/go-gost/gost/v3/pkg/common/bufpool"
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"github.com/go-gost/gost/v3/pkg/connector"
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md "github.com/go-gost/gost/v3/pkg/metadata"
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"github.com/go-gost/gost/v3/pkg/registry"
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"github.com/go-gost/x/internal/util/ss"
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"github.com/shadowsocks/go-shadowsocks2/core"
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)
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func init() {
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registry.ConnectorRegistry().Register("ss", NewConnector)
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}
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type ssConnector struct {
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cipher core.Cipher
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md metadata
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options connector.Options
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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 &ssConnector{
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options: options,
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}
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}
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func (c *ssConnector) 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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if c.options.Auth != nil {
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method := c.options.Auth.Username()
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password, _ := c.options.Auth.Password()
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c.cipher, err = ss.ShadowCipher(method, password, c.md.key)
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}
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return
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}
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func (c *ssConnector) Connect(ctx context.Context, conn net.Conn, network, address string, opts ...connector.ConnectOption) (net.Conn, error) {
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log := c.options.Logger.WithFields(map[string]any{
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"remote": conn.RemoteAddr().String(),
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"local": conn.LocalAddr().String(),
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"network": network,
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"address": address,
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})
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log.Infof("connect %s/%s", address, network)
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switch network {
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case "tcp", "tcp4", "tcp6":
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if _, ok := conn.(net.PacketConn); ok {
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err := fmt.Errorf("tcp over udp is unsupported")
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log.Error(err)
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return nil, err
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}
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default:
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err := fmt.Errorf("network %s is unsupported", network)
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log.Error(err)
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return nil, err
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}
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addr := gosocks5.Addr{}
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if err := addr.ParseFrom(address); err != nil {
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log.Error(err)
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return nil, err
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}
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rawaddr := bufpool.Get(512)
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defer bufpool.Put(rawaddr)
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n, err := addr.Encode(*rawaddr)
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if err != nil {
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log.Error("encoding addr: ", 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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if c.cipher != nil {
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conn = c.cipher.StreamConn(conn)
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}
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var sc net.Conn
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if c.md.noDelay {
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sc = ss.ShadowConn(conn, nil)
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// write the addr at once.
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if _, err := sc.Write((*rawaddr)[:n]); err != nil {
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return nil, err
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}
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} else {
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// cache the header
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sc = ss.ShadowConn(conn, (*rawaddr)[:n])
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}
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return sc, nil
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}
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27
connector/ss/metadata.go
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27
connector/ss/metadata.go
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@ -0,0 +1,27 @@
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package ss
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import (
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"time"
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mdata "github.com/go-gost/gost/v3/pkg/metadata"
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)
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type metadata struct {
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key string
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connectTimeout time.Duration
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noDelay bool
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}
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func (c *ssConnector) parseMetadata(md mdata.Metadata) (err error) {
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const (
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key = "key"
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connectTimeout = "timeout"
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noDelay = "nodelay"
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)
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c.md.key = mdata.GetString(md, key)
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c.md.connectTimeout = mdata.GetDuration(md, connectTimeout)
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c.md.noDelay = mdata.GetBool(md, noDelay)
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return
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}
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95
connector/ss/udp/connector.go
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95
connector/ss/udp/connector.go
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@ -0,0 +1,95 @@
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package ss
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import (
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"context"
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"fmt"
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"net"
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"time"
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"github.com/go-gost/gost/v3/pkg/connector"
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md "github.com/go-gost/gost/v3/pkg/metadata"
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"github.com/go-gost/gost/v3/pkg/registry"
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"github.com/go-gost/x/internal/util/relay"
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"github.com/go-gost/x/internal/util/ss"
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"github.com/shadowsocks/go-shadowsocks2/core"
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)
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func init() {
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registry.ConnectorRegistry().Register("ssu", NewConnector)
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}
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type ssuConnector struct {
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cipher core.Cipher
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md metadata
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options connector.Options
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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 &ssuConnector{
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options: options,
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}
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}
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func (c *ssuConnector) 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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if c.options.Auth != nil {
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method := c.options.Auth.Username()
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password, _ := c.options.Auth.Password()
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c.cipher, err = ss.ShadowCipher(method, password, c.md.key)
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}
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return
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}
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func (c *ssuConnector) Connect(ctx context.Context, conn net.Conn, network, address string, opts ...connector.ConnectOption) (net.Conn, error) {
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log := c.options.Logger.WithFields(map[string]any{
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"remote": conn.RemoteAddr().String(),
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"local": conn.LocalAddr().String(),
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"network": network,
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"address": address,
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})
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log.Infof("connect %s/%s", address, network)
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switch network {
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case "udp", "udp4", "udp6":
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default:
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err := fmt.Errorf("network %s is unsupported", network)
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log.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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taddr, _ := net.ResolveUDPAddr(network, address)
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if taddr == nil {
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taddr = &net.UDPAddr{}
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}
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pc, ok := conn.(net.PacketConn)
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if ok {
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if c.cipher != nil {
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pc = c.cipher.PacketConn(pc)
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}
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// standard UDP relay
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return ss.UDPClientConn(pc, conn.RemoteAddr(), taddr, c.md.bufferSize), nil
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}
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if c.cipher != nil {
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conn = ss.ShadowConn(c.cipher.StreamConn(conn), nil)
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}
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// UDP over TCP
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return relay.UDPTunClientConn(conn, taddr), nil
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}
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33
connector/ss/udp/metadata.go
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33
connector/ss/udp/metadata.go
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@ -0,0 +1,33 @@
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package ss
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import (
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"math"
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"time"
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mdata "github.com/go-gost/gost/v3/pkg/metadata"
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)
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type metadata struct {
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key string
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connectTimeout time.Duration
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bufferSize int
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}
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func (c *ssuConnector) parseMetadata(md mdata.Metadata) (err error) {
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const (
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key = "key"
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connectTimeout = "timeout"
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bufferSize = "bufferSize" // udp buffer size
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)
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c.md.key = mdata.GetString(md, key)
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c.md.connectTimeout = mdata.GetDuration(md, connectTimeout)
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if bs := mdata.GetInt(md, bufferSize); bs > 0 {
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c.md.bufferSize = int(math.Min(math.Max(float64(bs), 512), 64*1024))
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} else {
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c.md.bufferSize = 1024
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}
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return
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}
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