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//go:build (freebsd && 386) || (freebsd && arm)
6
7package syscall
8
9import "unsafe"
10
11func (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
20func (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	m := (*ifMsghdr)(unsafe.Pointer(any))
26	p.Header.Data.Hwassist = uint32(m.Data.Hwassist)
27	p.Header.Data.Epoch = m.Data.Epoch
28	p.Header.Data.Lastchange = m.Data.Lastchange
29	return &InterfaceMessage{Header: p.Header, Data: b[int(unsafe.Offsetof(p.Header.Data))+int(p.Header.Data.Datalen) : any.Msglen]}
30}
31