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Feature: support relay (proxy chains) (#539)

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This commit is contained in:
duama
2020-03-21 23:46:49 +08:00
committed by GitHub
parent 70a19b999d
commit c0a2473160
18 changed files with 293 additions and 86 deletions
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33
adapters/outbound/snell.go
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@ -15,7 +15,6 @@ import (
type Snell struct {
*Base
server string
psk []byte
obfsOption *simpleObfsOption
}
@ -28,45 +27,51 @@ type SnellOption struct {
ObfsOpts map[string]interface{} `proxy:"obfs-opts,omitempty"`
}
func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
c, err := dialer.DialContext(ctx, "tcp", s.server)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", s.server, err)
}
tcpKeepAlive(c)
func (s *Snell) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
switch s.obfsOption.Mode {
case "tls":
c = obfs.NewTLSObfs(c, s.obfsOption.Host)
case "http":
_, port, _ := net.SplitHostPort(s.server)
_, port, _ := net.SplitHostPort(s.addr)
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
err := snell.WriteHeader(c, metadata.String(), uint(port))
return c, err
}
func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
c, err := dialer.DialContext(ctx, "tcp", s.addr)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", s.addr, err)
}
tcpKeepAlive(c)
c, err = s.StreamConn(c, metadata)
return NewConn(c, s), err
}
func NewSnell(option SnellOption) (*Snell, error) {
server := net.JoinHostPort(option.Server, strconv.Itoa(option.Port))
addr := 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: %w", server, err)
return nil, fmt.Errorf("snell %s initialize obfs error: %w", addr, err)
}
if obfsOption.Mode != "tls" && obfsOption.Mode != "http" {
return nil, fmt.Errorf("snell %s obfs mode error: %s", server, obfsOption.Mode)
return nil, fmt.Errorf("snell %s obfs mode error: %s", addr, obfsOption.Mode)
}
return &Snell{
Base: &Base{
name: option.Name,
addr: addr,
tp: C.Snell,
},
server: server,
psk: psk,
obfsOption: obfsOption,
}, nil