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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "errors" | ||
| "net" | ||
|
|
||
| "github.com/riobard/go-shadowsocks2/socks" | ||
| ) | ||
|
|
||
| var listeners map[string]func(network, address string) (net.Listener, error) | ||
|
|
||
| func init() { | ||
| listeners = make(map[string]func(network, address string) (net.Listener, error)) | ||
| } | ||
|
|
||
| func listen(kind, network, address string) (net.Listener, error) { | ||
| f, ok := listeners[kind] | ||
| if ok { | ||
| return f(network, address) | ||
| } | ||
| return nil, errors.New("unsupported listener " + kind) | ||
| } | ||
|
|
||
| type strAddr string | ||
|
|
||
| func (a strAddr) Network() string { return "tcp" } | ||
| func (a strAddr) String() string { return string(a) } | ||
|
|
||
| type tunConn struct { | ||
| net.Conn | ||
| target net.Addr | ||
| } | ||
|
|
||
| func (c *tunConn) LocalAddr() net.Addr { return c.target } | ||
|
|
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| type tunListener struct { | ||
| net.Listener | ||
| target net.Addr | ||
| } | ||
|
|
||
| func tunListen(network, address, target string) (net.Listener, error) { | ||
| l, err := net.Listen(network, address) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &tunListener{l, strAddr(target)}, err | ||
| } | ||
|
|
||
| func (l *tunListener) Accept() (net.Conn, error) { | ||
| c, err := l.Listener.Accept() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &tunConn{c, l.target}, nil | ||
| } | ||
|
|
||
| type socksConn struct{ net.Conn } | ||
|
|
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| func (sc socksConn) LocalAddr() net.Addr { | ||
| addr, err := socks.Handshake(sc.Conn) | ||
| if err != nil { | ||
| return nil | ||
| } | ||
| return strAddr(addr.String()) | ||
| } | ||
|
|
||
| type socksListener struct{ net.Listener } | ||
|
|
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| func (l *socksListener) Accept() (net.Conn, error) { | ||
| c, err := l.Listener.Accept() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return socksConn{c}, nil | ||
| } | ||
|
|
||
| func socksListen(network, addr string) (net.Listener, error) { | ||
| l, err := net.Listen(network, addr) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &socksListener{l}, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "net" | ||
|
|
||
| "github.com/riobard/go-shadowsocks2/pfutil" | ||
| ) | ||
|
|
||
| func init() { | ||
| listeners["redir"] = pfListen | ||
| } | ||
|
|
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| type pfConn struct{ net.Conn } | ||
|
|
||
| func (c *pfConn) LocalAddr() net.Addr { | ||
| tc, ok := c.Conn.(*net.TCPConn) | ||
| if !ok { | ||
| return nil | ||
| } | ||
| addr, err := pfutil.NatLookup(tc) | ||
| if err != nil { | ||
| return nil | ||
| } | ||
| return addr | ||
| } | ||
|
|
||
| type pfListener struct{ net.Listener } | ||
|
|
||
| func (l *pfListener) Accept() (net.Conn, error) { | ||
| c, err := l.Listener.Accept() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &pfConn{c}, nil | ||
| } | ||
|
|
||
| func pfListen(network, address string) (net.Listener, error) { | ||
| l, err := net.Listen(network, address) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &pfListener{l}, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "net" | ||
| "syscall" | ||
|
|
||
| "github.com/riobard/go-shadowsocks2/nfutil" | ||
| ) | ||
|
|
||
| func init() { | ||
| listeners["redir"] = nfListen | ||
| listeners["tproxy"] = tproxyListen | ||
| } | ||
|
|
||
| type nfConn struct{ net.Conn } | ||
|
|
||
| func (c *nfConn) LocalAddr() net.Addr { | ||
| tc, ok := c.Conn.(*net.TCPConn) | ||
| if !ok { | ||
| return nil | ||
| } | ||
| addr, err := nfutil.GetOrigDst(tc, false) // TODO: detect if c is ipv6 | ||
| if err != nil { | ||
| return nil | ||
| } | ||
| return addr | ||
| } | ||
|
|
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| type nfListener struct{ net.Listener } | ||
|
|
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| func (l *nfListener) Accept() (net.Conn, error) { | ||
| c, err := l.Listener.Accept() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &nfConn{c}, nil | ||
| } | ||
|
|
||
| func nfListen(network, address string) (net.Listener, error) { | ||
| l, err := net.Listen(network, address) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &nfListener{l}, nil | ||
| } | ||
|
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| func tproxyListen(network, address string) (net.Listener, error) { | ||
| lcfg := net.ListenConfig{Control: func(network, address string, rc syscall.RawConn) error { | ||
| var err1, err2 error | ||
| err2 = rc.Control(func(fd uintptr) { err1 = syscall.SetsockoptInt(int(fd), syscall.SOL_IP, syscall.IP_TRANSPARENT, 1) }) | ||
| if err1 != nil { | ||
| return err1 | ||
| } | ||
| return err2 | ||
| }} | ||
| l, err := lcfg.Listen(context.Background(), network, address) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return l, nil | ||
| } |
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