go route_freebsd_32bit 源码
golang route_freebsd_32bit 代码
文件路径：/src/syscall/route_freebsd_32bit.go
// Copyright 2014 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.
//go:build (freebsd && 386) || (freebsd && arm)
package syscall
import "unsafe"
func (any *anyMessage) parseRouteMessage(b []byte) *RouteMessage {
p := (*RouteMessage)(unsafe.Pointer(any))
off := int(unsafe.Offsetof(p.Header.Rmx)) + SizeofRtMetrics
if freebsdConfArch == "amd64" {
off += SizeofRtMetrics // rt_metrics on amd64 is simply doubled
}
return &RouteMessage{Header: p.Header, Data: b[rsaAlignOf(off):any.Msglen]}
}
func (any *anyMessage) parseInterfaceMessage(b []byte) *InterfaceMessage {
p := (*InterfaceMessage)(unsafe.Pointer(any))
// FreeBSD 10 and beyond have a restructured mbuf
// packet header view.
// See https://svnweb.freebsd.org/base?view=revision&revision=254804.
if supportsABI(1000000) {
m := (*ifMsghdr)(unsafe.Pointer(any))
p.Header.Data.Hwassist = uint32(m.Data.Hwassist)
p.Header.Data.Epoch = m.Data.Epoch
p.Header.Data.Lastchange = m.Data.Lastchange
return &InterfaceMessage{Header: p.Header, Data: b[int(unsafe.Offsetof(p.Header.Data))+int(p.Header.Data.Datalen) : any.Msglen]}
}
return &InterfaceMessage{Header: p.Header, Data: b[int(unsafe.Offsetof(p.Header.Data))+int(p.Header.Data.Datalen) : any.Msglen]}
}
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