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Add additional functions for reconfiguring VXLAN interfaces after creation

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Signed-off-by: solidDoWant <fred.heinecke@yahoo.com>
This commit is contained in:
solidDoWant
2025-08-30 18:13:38 +00:00
committed by Vish (Ishaya) Abrams
parent b85149843e
commit 5f641a7410
1 changed files with 77 additions and 0 deletions
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77
link_linux.go
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@@ -1181,6 +1181,83 @@ func (h *Handle) LinkSetGROIPv4MaxSize(link Link, maxSize int) error {
return err return err
} }
// LinkSetVXLANGroup sets the group address of a VXLAN link device.
// Equivalent to: `ip link set $link type vxlan { remote | group } $group`
// Note: netlink does not support changing the group address family. If attempted, this will return an EOPNOTSUPP error.
func LinkSetVXLANGroup(link *Vxlan, group net.IP) error {
return pkgHandle.LinkSetVXLANGroup(link, group)
}
// LinkSetVXLANGroup sets the group address of a VXLAN link device.
// Equivalent to: `ip link set $link type vxlan { remote | group } $group [ dev $dev ]`
// Note: netlink does not support changing the group address family. If attempted, this will return an EOPNOTSUPP error.
func (h *Handle) LinkSetVXLANGroup(link *Vxlan, group net.IP) error {
if link.VtepDevIndex == 0 {
return fmt.Errorf("VTEP device index must be set to change or set the group address")
}
base := link.Attrs()
h.ensureIndex(base)
// RTM_SETLINK does not currently support changing the group address
req := h.newNetlinkRequest(unix.RTM_NEWLINK, unix.NLM_F_ACK)
msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
msg.Index = int32(base.Index)
req.AddData(msg)
linkInfo := nl.NewRtAttr(unix.IFLA_LINKINFO, nil)
linkInfo.AddRtAttr(nl.IFLA_INFO_KIND, nl.NonZeroTerminated(link.Type()))
data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
if v4Group := group.To4(); v4Group != nil {
data.AddRtAttr(nl.IFLA_VXLAN_GROUP, []byte(v4Group))
} else if v6group := group.To16(); v6group != nil {
data.AddRtAttr(nl.IFLA_VXLAN_GROUP6, []byte(v6group))
} else {
return fmt.Errorf("invalid group address %q", group.String())
}
req.AddData(linkInfo)
_, err := req.Execute(unix.NETLINK_ROUTE, 0)
return err
}
// LinkSetVXLANVtepDevIndex sets the VTEP device index of a VXLAN link device.
// Equivalent to: `ip link set $link type [ dev $dev ]`
func LinkSetVXLANVtepDevIndex(link *Vxlan, ifIndex int) error {
return pkgHandle.LinkSetVXLANVtepDevIndex(link, ifIndex)
}
// LinkSetVXLANVtepDevIndex sets the VTEP device index of a VXLAN link device.
// Equivalent to: `ip link set $link type [ dev $dev ]`
func (h *Handle) LinkSetVXLANVtepDevIndex(link *Vxlan, ifIndex int) error {
if link.Group != nil && ifIndex == 0 {
return fmt.Errorf("VTEP device index must be set when group address is set")
}
base := link.Attrs()
h.ensureIndex(base)
// RTM_SETLINK does not currently support changing the the VTEP device index
req := h.newNetlinkRequest(unix.RTM_NEWLINK, unix.NLM_F_ACK)
msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
msg.Index = int32(base.Index)
req.AddData(msg)
linkInfo := nl.NewRtAttr(unix.IFLA_LINKINFO, nil)
linkInfo.AddRtAttr(nl.IFLA_INFO_KIND, nl.NonZeroTerminated(link.Type()))
data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
data.AddRtAttr(nl.IFLA_VXLAN_LINK, nl.Uint32Attr(uint32(ifIndex)))
req.AddData(linkInfo)
_, err := req.Execute(unix.NETLINK_ROUTE, 0)
return err
}
func boolAttr(val bool) []byte { func boolAttr(val bool) []byte {
var v uint8 var v uint8
if val { if val {