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41bba8d80b
This change adds the Marshal method of RouteMessage to make it possible to exchange route messages between userspace processes and the kernel for the manipulation of routing information base inside the kernel. Change-Id: I0cf2c1a391820f41eb9c5eac1c172598cb2e1533 Reviewed-on: https://go-review.googlesource.com/36077 Reviewed-by: Ian Lance Taylor <iant@golang.org>
40 lines
812 B
Go
40 lines
812 B
Go
// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build darwin dragonfly freebsd netbsd openbsd
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package route
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import "unsafe"
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var (
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nativeEndian binaryByteOrder
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kernelAlign int
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wireFormats map[int]*wireFormat
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)
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func init() {
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i := uint32(1)
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b := (*[4]byte)(unsafe.Pointer(&i))
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if b[0] == 1 {
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nativeEndian = littleEndian
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} else {
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nativeEndian = bigEndian
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}
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kernelAlign, wireFormats = probeRoutingStack()
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}
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func roundup(l int) int {
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if l == 0 {
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return kernelAlign
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}
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return (l + kernelAlign - 1) & ^(kernelAlign - 1)
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}
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type wireFormat struct {
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extOff int // offset of header extension
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bodyOff int // offset of message body
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parse func(RIBType, []byte) (Message, error)
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}
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