105 lines
2.2 KiB
Go
105 lines
2.2 KiB
Go
package ssu
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import (
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"context"
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"net"
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"time"
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"github.com/go-gost/gost/pkg/bypass"
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"github.com/go-gost/gost/pkg/chain"
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"github.com/go-gost/gost/pkg/handler"
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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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"github.com/shadowsocks/go-shadowsocks2/core"
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ss "github.com/shadowsocks/shadowsocks-go/shadowsocks"
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)
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func init() {
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registry.RegisterHandler("ssu", NewHandler)
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}
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type ssuHandler struct {
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chain *chain.Chain
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bypass bypass.Bypass
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logger logger.Logger
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md metadata
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}
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func NewHandler(opts ...handler.Option) handler.Handler {
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options := &handler.Options{}
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for _, opt := range opts {
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opt(options)
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}
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return &ssuHandler{
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chain: options.Chain,
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bypass: options.Bypass,
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logger: options.Logger,
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}
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}
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func (h *ssuHandler) Init(md md.Metadata) (err error) {
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return h.parseMetadata(md)
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}
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func (h *ssuHandler) Handle(ctx context.Context, conn net.Conn) {
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defer conn.Close()
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start := time.Now()
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h.logger = h.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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h.logger.Infof("%s <> %s", conn.RemoteAddr(), conn.LocalAddr())
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defer func() {
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h.logger.WithFields(map[string]interface{}{
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"duration": time.Since(start),
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}).Infof("%s >< %s", conn.RemoteAddr(), conn.LocalAddr())
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}()
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}
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func (h *ssuHandler) parseMetadata(md md.Metadata) (err error) {
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h.md.cipher, err = h.initCipher(
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md.GetString(method),
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md.GetString(password),
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md.GetString(key),
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)
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if err != nil {
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return
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}
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h.md.readTimeout = md.GetDuration(readTimeout)
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h.md.retryCount = md.GetInt(retryCount)
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return
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}
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func (h *ssuHandler) initCipher(method, password string, key string) (core.Cipher, error) {
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if method == "" && password == "" {
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return nil, nil
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}
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c, _ := ss.NewCipher(method, password)
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if c != nil {
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return &shadowCipher{cipher: c}, nil
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}
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return core.PickCipher(method, []byte(key), password)
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}
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type shadowCipher struct {
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cipher *ss.Cipher
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}
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func (c *shadowCipher) StreamConn(conn net.Conn) net.Conn {
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return ss.NewConn(conn, c.cipher.Copy())
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}
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func (c *shadowCipher) PacketConn(conn net.PacketConn) net.PacketConn {
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return ss.NewSecurePacketConn(conn, c.cipher.Copy())
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}
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