82 lines
1.5 KiB
Go
82 lines
1.5 KiB
Go
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package nl
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import (
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"unsafe"
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"golang.org/x/sys/unix"
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)
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type RtMsg struct {
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unix.RtMsg
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}
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func NewRtMsg() *RtMsg {
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return &RtMsg{
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RtMsg: unix.RtMsg{
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Table: unix.RT_TABLE_MAIN,
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Scope: unix.RT_SCOPE_UNIVERSE,
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Protocol: unix.RTPROT_BOOT,
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Type: unix.RTN_UNICAST,
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},
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}
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}
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func NewRtDelMsg() *RtMsg {
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return &RtMsg{
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RtMsg: unix.RtMsg{
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Table: unix.RT_TABLE_MAIN,
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Scope: unix.RT_SCOPE_NOWHERE,
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},
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}
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}
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func (msg *RtMsg) Len() int {
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return unix.SizeofRtMsg
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}
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func DeserializeRtMsg(b []byte) *RtMsg {
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return (*RtMsg)(unsafe.Pointer(&b[0:unix.SizeofRtMsg][0]))
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}
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func (msg *RtMsg) Serialize() []byte {
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return (*(*[unix.SizeofRtMsg]byte)(unsafe.Pointer(msg)))[:]
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}
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type RtNexthop struct {
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unix.RtNexthop
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Children []NetlinkRequestData
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}
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func DeserializeRtNexthop(b []byte) *RtNexthop {
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return (*RtNexthop)(unsafe.Pointer(&b[0:unix.SizeofRtNexthop][0]))
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}
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func (msg *RtNexthop) Len() int {
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if len(msg.Children) == 0 {
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return unix.SizeofRtNexthop
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}
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l := 0
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for _, child := range msg.Children {
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l += rtaAlignOf(child.Len())
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}
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l += unix.SizeofRtNexthop
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return rtaAlignOf(l)
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}
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func (msg *RtNexthop) Serialize() []byte {
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length := msg.Len()
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msg.RtNexthop.Len = uint16(length)
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buf := make([]byte, length)
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copy(buf, (*(*[unix.SizeofRtNexthop]byte)(unsafe.Pointer(msg)))[:])
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next := rtaAlignOf(unix.SizeofRtNexthop)
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if len(msg.Children) > 0 {
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for _, child := range msg.Children {
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childBuf := child.Serialize()
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copy(buf[next:], childBuf)
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next += rtaAlignOf(len(childBuf))
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}
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}
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return buf
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}
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