| // Copyright 2014 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" |
| ) |
| |
| const ( |
| sysGETSOCKOPT = 0xf |
| sysSETSOCKOPT = 0xe |
| ) |
| |
| func socketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (int, syscall.Errno) |
| |
| func getsockopt(fd, level, name int, v unsafe.Pointer, l *sysSockoptLen) error { |
| if _, errno := socketcall(sysGETSOCKOPT, uintptr(fd), uintptr(level), uintptr(name), uintptr(v), uintptr(unsafe.Pointer(l)), 0); errno != 0 { |
| return error(errno) |
| } |
| return nil |
| } |
| |
| func setsockopt(fd, level, name int, v unsafe.Pointer, l sysSockoptLen) error { |
| if _, errno := socketcall(sysSETSOCKOPT, uintptr(fd), uintptr(level), uintptr(name), uintptr(v), uintptr(l), 0); errno != 0 { |
| return error(errno) |
| } |
| return nil |
| } |