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add low level sockets to bypass nekobox/android vpn
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uoosef
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Aug 10, 2023
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| package protect | ||
|
|
||
| import ( | ||
| "github.com/daeuniverse/softwind/netproxy" | ||
| "github.com/daeuniverse/softwind/protocol/direct" | ||
| ) | ||
|
|
||
| var protectPath string | ||
|
|
||
| type ClientDialer struct { | ||
| netproxy.Dialer | ||
| } | ||
|
|
||
| func NewClientDialer() *ClientDialer { | ||
| protectPath = "protect_path" | ||
| return &ClientDialer{ | ||
| direct.SymmetricDirect, | ||
| } | ||
| } | ||
|
|
||
| func (c *ClientDialer) Dial(network string, addr string) (netproxy.Conn, error) { | ||
| magicNetwork := netproxy.MagicNetwork{ | ||
| Network: network, | ||
| Mark: 114514, | ||
| } | ||
| return c.Dialer.Dial(magicNetwork.Encode(), addr) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| package protect | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "syscall" | ||
|
|
||
| "github.com/daeuniverse/softwind/netproxy" | ||
| ) | ||
|
|
||
| func init() { | ||
| soMark := netproxy.SoMark | ||
| netproxy.SoMark = func(fd, mark int) error { | ||
| if protectPath == "" { | ||
| return soMark(fd, mark) | ||
| } | ||
| if err := protect(fd, protectPath); err != nil { | ||
| return fmt.Errorf("protect failed: %w", err) | ||
| } | ||
| return nil | ||
| } | ||
| soMarkControl := netproxy.SoMarkControl | ||
| netproxy.SoMarkControl = func(c syscall.RawConn, mark int) error { | ||
| if protectPath == "" { | ||
| return soMarkControl(c, mark) | ||
| } | ||
| var sockOptErr error | ||
| controlErr := c.Control(func(fd uintptr) { | ||
| err := protect(int(fd), protectPath) | ||
| if err != nil { | ||
| sockOptErr = fmt.Errorf("error setting SO_MARK socket option: %w", err) | ||
| } | ||
| }) | ||
| if controlErr != nil { | ||
| return fmt.Errorf("error invoking socket control function: %w", controlErr) | ||
| } | ||
| return sockOptErr | ||
| } | ||
| } | ||
|
|
||
| func protect(fd int, unixPath string) error { | ||
| if fd <= 0 { | ||
| return nil | ||
| } | ||
|
|
||
| socket, err := syscall.Socket(syscall.AF_UNIX, syscall.SOCK_STREAM, 0) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer syscall.Close(socket) | ||
|
|
||
| _ = syscall.SetsockoptTimeval(socket, syscall.SOL_SOCKET, syscall.SO_RCVTIMEO, &syscall.Timeval{Sec: 3}) | ||
| _ = syscall.SetsockoptTimeval(socket, syscall.SOL_SOCKET, syscall.SO_SNDTIMEO, &syscall.Timeval{Sec: 3}) | ||
|
|
||
| err = syscall.Connect(socket, &syscall.SockaddrUnix{Name: unixPath}) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| err = syscall.Sendmsg(socket, nil, syscall.UnixRights(fd), nil, 0) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| dummy := []byte{1} | ||
| n, err := syscall.Read(socket, dummy) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if n != 1 { | ||
| return fmt.Errorf("protect failed") | ||
| } | ||
| return nil | ||
| } |
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