github.com/ipfans/trojan-go@v0.11.0/tunnel/tproxy/getsockopt_i386.go (about)

     1  //go:build linux && 386
     2  // +build linux,386
     3  
     4  package tproxy
     5  
     6  import (
     7  	"syscall"
     8  	"unsafe"
     9  )
    10  
    11  const GETSOCKOPT = 15
    12  
    13  func getsockopt(fd int, level int, optname int, optval unsafe.Pointer, optlen *uint32) (err error) {
    14  	_, _, e := syscall.Syscall6(
    15  		GETSOCKOPT, uintptr(fd), uintptr(level), uintptr(optname),
    16  		uintptr(optval), uintptr(unsafe.Pointer(optlen)), 0)
    17  	if e != 0 {
    18  		return e
    19  	}
    20  	return
    21  }