mirror of https://github.com/jetkvm/kvm.git
59 lines
1.1 KiB
Go
59 lines
1.1 KiB
Go
// Copyright 2012 Google, Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the LICENSE file in the root of the source
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// tree.
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// +build linux
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package afpacket
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import (
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"unsafe"
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"golang.org/x/sys/unix"
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)
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// setsockopt provides access to the setsockopt syscall.
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func setsockopt(fd, level, name int, val unsafe.Pointer, vallen uintptr) error {
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_, _, errno := unix.Syscall6(
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unix.SYS_SETSOCKOPT,
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uintptr(fd),
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uintptr(level),
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uintptr(name),
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uintptr(val),
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vallen,
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0,
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)
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if errno != 0 {
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return error(errno)
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}
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return nil
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}
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// getsockopt provides access to the getsockopt syscall.
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func getsockopt(fd, level, name int, val unsafe.Pointer, vallen uintptr) error {
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_, _, errno := unix.Syscall6(
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unix.SYS_GETSOCKOPT,
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uintptr(fd),
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uintptr(level),
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uintptr(name),
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uintptr(val),
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vallen,
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0,
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)
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if errno != 0 {
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return error(errno)
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}
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return nil
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}
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// htons converts a short (uint16) from host-to-network byte order.
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// Thanks to mikioh for this neat trick:
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// https://github.com/mikioh/-stdyng/blob/master/afpacket.go
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func htons(i uint16) uint16 {
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return (i<<8)&0xff00 | i>>8
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}
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