| // 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. |
| |
| // +build darwin dragonfly freebsd netbsd openbsd |
| |
| package route |
| |
| import "unsafe" |
| |
| var ( |
| nativeEndian binaryByteOrder |
| kernelAlign int |
| wireFormats map[int]*wireFormat |
| ) |
| |
| func init() { |
| i := uint32(1) |
| b := (*[4]byte)(unsafe.Pointer(&i)) |
| if b[0] == 1 { |
| nativeEndian = littleEndian |
| } else { |
| nativeEndian = bigEndian |
| } |
| kernelAlign, wireFormats = probeRoutingStack() |
| } |
| |
| func roundup(l int) int { |
| if l == 0 { |
| return kernelAlign |
| } |
| return (l + kernelAlign - 1) & ^(kernelAlign - 1) |
| } |
| |
| type wireFormat struct { |
| extOff int // offset of header extension |
| bodyOff int // offset of message body |
| parse func(RIBType, []byte) (Message, error) |
| } |
