mirror of
https://github.com/vishvananda/netlink.git
synced 2026-04-22 23:27:13 +08:00
Patryk Diak
ab2b1904dc
Implement bridge VNI filtering operations (add/delete/list) for VXLAN devices with VniFilter enabled. This allows managing VNI filters via RTM_NEWTUNNEL/RTM_DELTUNNEL/RTM_GETTUNNEL netlink messages. Equivalent to iproute2 bridge commands: - bridge vni add dev DEV vni VNI[-VNIEND] - bridge vni del dev DEV vni VNI[-VNIEND] - bridge vni show Reference implementation: https://github.com/iproute2/iproute2/blob/main/bridge/vni.c Signed-off-by: Patryk Diak <pdiak@redhat.com>
159 lines
3.0 KiB
Go
159 lines
3.0 KiB
Go
package nl
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import (
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"fmt"
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"unsafe"
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)
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const (
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SizeofBridgeVlanInfo = 0x04
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SizeofTunnelMsg = 0x08
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)
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/* Bridge Flags */
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const (
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BRIDGE_FLAGS_MASTER = iota + 1 /* Bridge command to/from master */
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BRIDGE_FLAGS_SELF /* Bridge command to/from lowerdev */
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)
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/* Bridge management nested attributes
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* [IFLA_AF_SPEC] = {
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* [IFLA_BRIDGE_FLAGS]
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* [IFLA_BRIDGE_MODE]
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* [IFLA_BRIDGE_VLAN_INFO]
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* }
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*/
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const (
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IFLA_BRIDGE_FLAGS = iota
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IFLA_BRIDGE_MODE
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IFLA_BRIDGE_VLAN_INFO
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IFLA_BRIDGE_VLAN_TUNNEL_INFO
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)
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const (
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IFLA_BRIDGE_VLAN_TUNNEL_UNSPEC = iota
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IFLA_BRIDGE_VLAN_TUNNEL_ID
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IFLA_BRIDGE_VLAN_TUNNEL_VID
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IFLA_BRIDGE_VLAN_TUNNEL_FLAGS
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)
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const (
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BRIDGE_VLAN_INFO_MASTER = 1 << iota
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BRIDGE_VLAN_INFO_PVID
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BRIDGE_VLAN_INFO_UNTAGGED
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BRIDGE_VLAN_INFO_RANGE_BEGIN
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BRIDGE_VLAN_INFO_RANGE_END
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)
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// struct bridge_vlan_info {
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// __u16 flags;
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// __u16 vid;
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// };
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type TunnelInfo struct {
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TunId uint32
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Vid uint16
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}
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type BridgeVlanInfo struct {
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Flags uint16
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Vid uint16
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}
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func (b *BridgeVlanInfo) Serialize() []byte {
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return (*(*[SizeofBridgeVlanInfo]byte)(unsafe.Pointer(b)))[:]
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}
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func DeserializeBridgeVlanInfo(b []byte) *BridgeVlanInfo {
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return (*BridgeVlanInfo)(unsafe.Pointer(&b[0:SizeofBridgeVlanInfo][0]))
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}
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func (b *BridgeVlanInfo) PortVID() bool {
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return b.Flags&BRIDGE_VLAN_INFO_PVID > 0
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}
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func (b *BridgeVlanInfo) EngressUntag() bool {
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return b.Flags&BRIDGE_VLAN_INFO_UNTAGGED > 0
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}
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func (b *BridgeVlanInfo) String() string {
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return fmt.Sprintf("%+v", *b)
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}
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/* New extended info filters for IFLA_EXT_MASK */
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const (
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RTEXT_FILTER_VF = 1 << iota
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RTEXT_FILTER_BRVLAN
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RTEXT_FILTER_BRVLAN_COMPRESSED
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)
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/* VXLAN VNI filter attributes */
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const (
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VXLAN_VNIFILTER_UNSPEC = iota
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VXLAN_VNIFILTER_ENTRY
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)
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const (
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VXLAN_VNIFILTER_ENTRY_UNSPEC = iota
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VXLAN_VNIFILTER_ENTRY_START
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VXLAN_VNIFILTER_ENTRY_END
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)
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// struct tunnel_msg {
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// __u8 family;
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// __u8 flags;
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// __u16 reserved2;
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// __u32 ifindex;
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// };
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type TunnelMsg struct {
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Family uint8
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Flags uint8
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Reserved uint16
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Ifindex uint32
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}
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func NewTunnelMsg(family uint8, ifindex int) *TunnelMsg {
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return &TunnelMsg{
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Family: family,
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Ifindex: uint32(ifindex),
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}
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}
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func (msg *TunnelMsg) Len() int {
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return SizeofTunnelMsg
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}
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func (msg *TunnelMsg) Serialize() []byte {
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return (*(*[SizeofTunnelMsg]byte)(unsafe.Pointer(msg)))[:]
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}
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func DeserializeTunnelMsg(b []byte) *TunnelMsg {
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return (*TunnelMsg)(unsafe.Pointer(&b[0:SizeofTunnelMsg][0]))
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}
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type BridgeVniInfo struct {
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Vni uint32
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VniEnd uint32
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}
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func (b *BridgeVniInfo) String() string {
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return fmt.Sprintf("%+v", *b)
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}
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func DeserializeBridgeVniInfo(b []byte) (*BridgeVniInfo, error) {
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vni := &BridgeVniInfo{}
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attrs, err := ParseRouteAttr(b)
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if err != nil {
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return nil, err
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}
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for _, attr := range attrs {
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switch attr.Attr.Type {
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case VXLAN_VNIFILTER_ENTRY_START:
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vni.Vni = NativeEndian().Uint32(attr.Value)
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case VXLAN_VNIFILTER_ENTRY_END:
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vni.VniEnd = NativeEndian().Uint32(attr.Value)
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}
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}
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return vni, nil
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}
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