clash/adapters/outbound/trojan.go

107 lines
2.6 KiB
Go

package outbound
import (
"context"
"encoding/json"
"fmt"
"net"
"strconv"
"github.com/Dreamacro/clash/component/dialer"
"github.com/Dreamacro/clash/component/trojan"
C "github.com/Dreamacro/clash/constant"
)
type Trojan struct {
*Base
instance *trojan.Trojan
}
type TrojanOption struct {
Name string `proxy:"name"`
Server string `proxy:"server"`
Port int `proxy:"port"`
Password string `proxy:"password"`
ALPN []string `proxy:"alpn,omitempty"`
SNI string `proxy:"sni,omitempty"`
SkipCertVerify bool `proxy:"skip-cert-verify,omitempty"`
UDP bool `proxy:"udp,omitempty"`
}
func (t *Trojan) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
c, err := t.instance.StreamConn(c)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
}
err = t.instance.WriteHeader(c, trojan.CommandTCP, serializesSocksAddr(metadata))
return c, err
}
func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
c, err := dialer.DialContext(ctx, "tcp", t.addr)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
}
tcpKeepAlive(c)
c, err = t.StreamConn(c, metadata)
if err != nil {
return nil, err
}
return NewConn(c, t), err
}
func (t *Trojan) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
ctx, cancel := context.WithTimeout(context.Background(), tcpTimeout)
defer cancel()
c, err := dialer.DialContext(ctx, "tcp", t.addr)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
}
tcpKeepAlive(c)
c, err = t.instance.StreamConn(c)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
}
err = t.instance.WriteHeader(c, trojan.CommandUDP, serializesSocksAddr(metadata))
if err != nil {
return nil, err
}
pc := t.instance.PacketConn(c)
return newPacketConn(pc, t), err
}
func (t *Trojan) MarshalJSON() ([]byte, error) {
return json.Marshal(map[string]string{
"type": t.Type().String(),
})
}
func NewTrojan(option TrojanOption) (*Trojan, error) {
addr := net.JoinHostPort(option.Server, strconv.Itoa(option.Port))
tOption := &trojan.Option{
Password: option.Password,
ALPN: option.ALPN,
ServerName: option.Server,
SkipCertVerify: option.SkipCertVerify,
ClientSessionCache: getClientSessionCache(),
}
if option.SNI != "" {
tOption.ServerName = option.SNI
}
return &Trojan{
Base: &Base{
name: option.Name,
addr: addr,
tp: C.Trojan,
udp: option.UDP,
},
instance: trojan.New(tOption),
}, nil
}