72 lines
1.9 KiB
Go
72 lines
1.9 KiB
Go
package adapters
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"net"
|
|
"strconv"
|
|
|
|
"github.com/Dreamacro/clash/common/structure"
|
|
obfs "github.com/Dreamacro/clash/component/simple-obfs"
|
|
"github.com/Dreamacro/clash/component/snell"
|
|
C "github.com/Dreamacro/clash/constant"
|
|
)
|
|
|
|
type Snell struct {
|
|
*Base
|
|
server string
|
|
psk []byte
|
|
obfsOption *simpleObfsOption
|
|
}
|
|
|
|
type SnellOption struct {
|
|
Name string `proxy:"name"`
|
|
Server string `proxy:"server"`
|
|
Port int `proxy:"port"`
|
|
Psk string `proxy:"psk"`
|
|
ObfsOpts map[string]interface{} `proxy:"obfs-opts,omitempty"`
|
|
}
|
|
|
|
func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
|
|
c, err := dialContext(ctx, "tcp", s.server)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("%s connect error: %s", s.server, err.Error())
|
|
}
|
|
tcpKeepAlive(c)
|
|
switch s.obfsOption.Mode {
|
|
case "tls":
|
|
c = obfs.NewTLSObfs(c, s.obfsOption.Host)
|
|
case "http":
|
|
_, port, _ := net.SplitHostPort(s.server)
|
|
c = obfs.NewHTTPObfs(c, s.obfsOption.Host, port)
|
|
}
|
|
c = snell.StreamConn(c, s.psk)
|
|
port, _ := strconv.Atoi(metadata.DstPort)
|
|
err = snell.WriteHeader(c, metadata.String(), uint(port))
|
|
return newConn(c, s), err
|
|
}
|
|
|
|
func NewSnell(option SnellOption) (*Snell, error) {
|
|
server := net.JoinHostPort(option.Server, strconv.Itoa(option.Port))
|
|
psk := []byte(option.Psk)
|
|
|
|
decoder := structure.NewDecoder(structure.Option{TagName: "obfs", WeaklyTypedInput: true})
|
|
obfsOption := &simpleObfsOption{Host: "bing.com"}
|
|
if err := decoder.Decode(option.ObfsOpts, obfsOption); err != nil {
|
|
return nil, fmt.Errorf("snell %s initialize obfs error: %s", server, err.Error())
|
|
}
|
|
|
|
if obfsOption.Mode != "tls" && obfsOption.Mode != "http" {
|
|
return nil, fmt.Errorf("snell %s obfs mode error: %s", server, obfsOption.Mode)
|
|
}
|
|
|
|
return &Snell{
|
|
Base: &Base{
|
|
name: option.Name,
|
|
tp: C.Snell,
|
|
},
|
|
server: server,
|
|
psk: psk,
|
|
obfsOption: obfsOption,
|
|
}, nil
|
|
}
|