45 lines
1.1 KiB
Go
45 lines
1.1 KiB
Go
|
// Copyright 2017 Mikio Hara. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
package tcp
|
||
|
|
|
||
|
|
import (
|
||
|
|
"syscall"
|
||
|
|
"unsafe"
|
||
|
|
)
|
||
|
|
|
||
|
|
const (
|
||
|
|
sysSIOCINQ = 0x541b
|
||
|
|
sysSIOCOUTQ = 0x5411
|
||
|
|
)
|
||
|
|
|
||
|
|
func ioctl(s uintptr, ioc int, b []byte) error {
|
||
|
|
if _, _, errno := syscall.Syscall(syscall.SYS_IOCTL, s, uintptr(ioc), uintptr(unsafe.Pointer(&b[0]))); errno != 0 {
|
||
|
|
return error(errno)
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
const (
|
||
|
|
sysSETSOCKOPT = 0xe
|
||
|
|
sysGETSOCKOPT = 0xf
|
||
|
|
)
|
||
|
|
|
||
|
|
func socketcall(call, a0, a1, a2, a3, a4, a5 uintptr) (uintptr, syscall.Errno)
|
||
|
|
|
||
|
|
func setsockopt(s uintptr, level, name int, b []byte) error {
|
||
|
|
if _, errno := socketcall(sysSETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(len(b)), 0); errno != 0 {
|
||
|
|
return error(errno)
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func getsockopt(s uintptr, level, name int, b []byte) (int, error) {
|
||
|
|
l := uint32(len(b))
|
||
|
|
if _, errno := socketcall(sysGETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(unsafe.Pointer(&l)), 0); errno != 0 {
|
||
|
|
return int(l), error(errno)
|
||
|
|
}
|
||
|
|
return int(l), nil
|
||
|
|
}
|