75 lines
1.4 KiB
Go

package core
import (
"net"
"os"
"syscall"
"time"
)
type Obfuscator interface {
Deobfuscate(buf []byte, n int) int
Obfuscate(p []byte) []byte
}
type obfsUDPConn struct {
Orig *net.UDPConn
Obfuscator Obfuscator
}
func (c *obfsUDPConn) SyscallConn() (syscall.RawConn, error) {
return c.Orig.SyscallConn()
}
func (c *obfsUDPConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
oldN, addr, err := c.Orig.ReadFrom(p)
if oldN > 0 {
newN := c.Obfuscator.Deobfuscate(p, oldN)
return newN, addr, err
} else {
return 0, addr, err
}
}
func (c *obfsUDPConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
np := c.Obfuscator.Obfuscate(p)
_, err = c.Orig.WriteTo(np, addr)
if err != nil {
return 0, err
} else {
return len(p), nil
}
}
func (c *obfsUDPConn) Close() error {
return c.Orig.Close()
}
func (c *obfsUDPConn) LocalAddr() net.Addr {
return c.Orig.LocalAddr()
}
func (c *obfsUDPConn) SetDeadline(t time.Time) error {
return c.Orig.SetDeadline(t)
}
func (c *obfsUDPConn) SetReadDeadline(t time.Time) error {
return c.Orig.SetReadDeadline(t)
}
func (c *obfsUDPConn) SetWriteDeadline(t time.Time) error {
return c.Orig.SetWriteDeadline(t)
}
func (c *obfsUDPConn) SetReadBuffer(bytes int) error {
return c.Orig.SetReadBuffer(bytes)
}
func (c *obfsUDPConn) SetWriteBuffer(bytes int) error {
return c.Orig.SetWriteBuffer(bytes)
}
func (c *obfsUDPConn) File() (f *os.File, err error) {
return c.Orig.File()
}