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netlink: Add uint32Attr helper 

Signed-off-by: Jonathan Rudenberg <jonathan@titanous.com>
This commit is contained in:
Jonathan Rudenberg 2014-09-15 18:44:48 -04:00
parent c1fa152a61
commit 9fb21a605a
1 changed files with 11 additions and 28 deletions
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39
netlink/netlink_linux.go
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@ -221,6 +221,12 @@ func (a *RtAttr) ToWireFormat() []byte {
return buf
}
func uint32Attr(t int, n uint32) *RtAttr {
buf := make([]byte, 4)
native.PutUint32(buf, n)
return newRtAttr(t, buf)
}
type NetlinkRequest struct {
syscall.NlMsghdr
Data []NetlinkRequestData
@ -456,14 +462,11 @@ func AddRoute(destination, source, gateway, device string) error {
wb.AddData(attr)
}
b := make([]byte, 4)
iface, err := net.InterfaceByName(device)
if err != nil {
return err
}
native.PutUint32(b, uint32(iface.Index))
wb.AddData(newRtAttr(syscall.RTA_OIF, b))
wb.AddData(uint32Attr(syscall.RTA_OIF, uint32(iface.Index)))
if err := s.Send(wb); err != nil {
return err
@ -537,12 +540,7 @@ func NetworkSetMTU(iface *net.Interface, mtu int) error {
msg.Index = int32(iface.Index)
msg.Change = DEFAULT_CHANGE
wb.AddData(msg)
b := make([]byte, 4)
native.PutUint32(b, uint32(mtu))
data := newRtAttr(syscall.IFLA_MTU, b)
wb.AddData(data)
wb.AddData(uint32Attr(syscall.IFLA_MTU, uint32(mtu)))
if err := s.Send(wb); err != nil {
return err
@ -566,12 +564,7 @@ func NetworkSetMaster(iface, master *net.Interface) error {
msg.Index = int32(iface.Index)
msg.Change = DEFAULT_CHANGE
wb.AddData(msg)
b := make([]byte, 4)
native.PutUint32(b, uint32(master.Index))
data := newRtAttr(syscall.IFLA_MASTER, b)
wb.AddData(data)
wb.AddData(uint32Attr(syscall.IFLA_MASTER, uint32(master.Index)))
if err := s.Send(wb); err != nil {
return err
@ -595,12 +588,7 @@ func NetworkSetNsPid(iface *net.Interface, nspid int) error {
msg.Index = int32(iface.Index)
msg.Change = DEFAULT_CHANGE
wb.AddData(msg)
b := make([]byte, 4)
native.PutUint32(b, uint32(nspid))
data := newRtAttr(syscall.IFLA_NET_NS_PID, b)
wb.AddData(data)
wb.AddData(uint32Attr(syscall.IFLA_NET_NS_PID, uint32(nspid)))
if err := s.Send(wb); err != nil {
return err
@ -624,12 +612,7 @@ func NetworkSetNsFd(iface *net.Interface, fd int) error {
msg.Index = int32(iface.Index)
msg.Change = DEFAULT_CHANGE
wb.AddData(msg)
b := make([]byte, 4)
native.PutUint32(b, uint32(fd))
data := newRtAttr(IFLA_NET_NS_FD, b)
wb.AddData(data)
wb.AddData(uint32Attr(IFLA_NET_NS_FD, uint32(fd)))
if err := s.Send(wb); err != nil {
return err