libgo/go/syscall/route_freebsd_32bit.go

   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) parseRouteMessage(b []byte) *RouteMessage {
  12         p := (*RouteMessage)(unsafe.Pointer(any))
  13         off := int(unsafe.Offsetof(p.Header.Rmx)) + SizeofRtMetrics
  14         if freebsdConfArch == "amd64" {
  15                 off += SizeofRtMetrics // rt_metrics on amd64 is simply doubled
  16         }
  17         return &RouteMessage{Header: p.Header, Data: b[rsaAlignOf(off):any.Msglen]}
  18 }
  19
  20 func (any *anyMessage) parseInterfaceMessage(b []byte) *InterfaceMessage {
  21         p := (*InterfaceMessage)(unsafe.Pointer(any))
  22         // FreeBSD 10 and beyond have a restructured mbuf
  23         // packet header view.
  24         // See https://svnweb.freebsd.org/base?view=revision&revision=254804.
  25         if freebsdVersion >= 1000000 {
  26                 m := (*ifMsghdr)(unsafe.Pointer(any))
  27                 p.Header.Data.Hwassist = uint32(m.Data.Hwassist)
  28                 p.Header.Data.Epoch = m.Data.Epoch
  29                 p.Header.Data.Lastchange = m.Data.Lastchange
  30                 return &InterfaceMessage{Header: p.Header, Data: b[int(unsafe.Offsetof(p.Header.Data))+int(p.Header.Data.Datalen) : any.Msglen]}
  31         }
  32         return &InterfaceMessage{Header: p.Header, Data: b[int(unsafe.Offsetof(p.Header.Data))+int(p.Header.Data.Datalen) : any.Msglen]}
  33 }