38 lines
1.1 KiB
Go
38 lines
1.1 KiB
Go
// Copyright 2016 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package ipv4
|
|
|
|
import (
|
|
"syscall"
|
|
"unsafe"
|
|
)
|
|
|
|
//go:cgo_import_dynamic libc___xnet_getsockopt __xnet_getsockopt "libsocket.so"
|
|
//go:cgo_import_dynamic libc_setsockopt setsockopt "libsocket.so"
|
|
|
|
//go:linkname procGetsockopt libc___xnet_getsockopt
|
|
//go:linkname procSetsockopt libc_setsockopt
|
|
|
|
var (
|
|
procGetsockopt uintptr
|
|
procSetsockopt uintptr
|
|
)
|
|
|
|
func sysvicall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (uintptr, uintptr, syscall.Errno)
|
|
|
|
func getsockopt(s uintptr, level, name int, v unsafe.Pointer, l *uint32) error {
|
|
_, _, errno := sysvicall6(uintptr(unsafe.Pointer(&procGetsockopt)), 5, s, uintptr(level), uintptr(name), uintptr(v), uintptr(unsafe.Pointer(l)), 0)
|
|
if errno != 0 {
|
|
return error(errno)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func setsockopt(s uintptr, level, name int, v unsafe.Pointer, l uint32) error {
|
|
if _, _, errno := sysvicall6(uintptr(unsafe.Pointer(&procSetsockopt)), 5, s, uintptr(level), uintptr(name), uintptr(v), uintptr(l), 0); errno != 0 {
|
|
return error(errno)
|
|
}
|
|
return nil
|
|
}
|