github.com/hbdrawn/golang@v0.0.0-20141214014649-6b835209aba2/src/syscall/route_freebsd_32bit.go (about)

     1  // Copyright 2014 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // +build freebsd,386 freebsd,arm
     6  
     7  package syscall
     8  
     9  import "unsafe"
    10  
    11  func (any *anyMessage) parseInterfaceMessage(b []byte) *InterfaceMessage {
    12  	p := (*InterfaceMessage)(unsafe.Pointer(any))
    13  	// FreeBSD 10 and beyond have a restructured mbuf
    14  	// packet header view.
    15  	// See http://svnweb.freebsd.org/base?view=revision&revision=254804.
    16  	if freebsdVersion >= 1000000 {
    17  		m := (*ifMsghdr)(unsafe.Pointer(any))
    18  		p.Header.Data.Hwassist = uint32(m.Data.Hwassist)
    19  		p.Header.Data.Epoch = m.Data.Epoch
    20  		p.Header.Data.Lastchange = m.Data.Lastchange
    21  		return &InterfaceMessage{Header: p.Header, Data: b[sizeofIfMsghdr:any.Msglen]}
    22  	}
    23  	return &InterfaceMessage{Header: p.Header, Data: b[SizeofIfMsghdr:any.Msglen]}
    24  }