build: update github.com/vishvananda/netlink to 1.3.0

This includes a breaking change:
acdc658b86
route.Dst is now a zero IPNet instead of nil

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

vendor/github.com/vishvananda/netlink/chain_linux.go

@@ -0,0 +1,112 @@
+package netlink
+
+import (
+	"github.com/vishvananda/netlink/nl"
+	"golang.org/x/sys/unix"
+)
+
+// ChainDel will delete a chain from the system.
+func ChainDel(link Link, chain Chain) error {
+	// Equivalent to: `tc chain del $chain`
+	return pkgHandle.ChainDel(link, chain)
+}
+
+// ChainDel will delete a chain from the system.
+// Equivalent to: `tc chain del $chain`
+func (h *Handle) ChainDel(link Link, chain Chain) error {
+	return h.chainModify(unix.RTM_DELCHAIN, 0, link, chain)
+}
+
+// ChainAdd will add a chain to the system.
+// Equivalent to: `tc chain add`
+func ChainAdd(link Link, chain Chain) error {
+	return pkgHandle.ChainAdd(link, chain)
+}
+
+// ChainAdd will add a chain to the system.
+// Equivalent to: `tc chain add`
+func (h *Handle) ChainAdd(link Link, chain Chain) error {
+	return h.chainModify(
+		unix.RTM_NEWCHAIN,
+		unix.NLM_F_CREATE|unix.NLM_F_EXCL,
+		link,
+		chain)
+}
+
+func (h *Handle) chainModify(cmd, flags int, link Link, chain Chain) error {
+	req := h.newNetlinkRequest(cmd, flags|unix.NLM_F_ACK)
+	index := int32(0)
+	if link != nil {
+		base := link.Attrs()
+		h.ensureIndex(base)
+		index = int32(base.Index)
+	}
+	msg := &nl.TcMsg{
+		Family:  nl.FAMILY_ALL,
+		Ifindex: index,
+		Parent:  chain.Parent,
+	}
+	req.AddData(msg)
+	req.AddData(nl.NewRtAttr(nl.TCA_CHAIN, nl.Uint32Attr(chain.Chain)))
+
+	_, err := req.Execute(unix.NETLINK_ROUTE, 0)
+	return err
+}
+
+// ChainList gets a list of chains in the system.
+// Equivalent to: `tc chain list`.
+// The list can be filtered by link.
+func ChainList(link Link, parent uint32) ([]Chain, error) {
+	return pkgHandle.ChainList(link, parent)
+}
+
+// ChainList gets a list of chains in the system.
+// Equivalent to: `tc chain list`.
+// The list can be filtered by link.
+func (h *Handle) ChainList(link Link, parent uint32) ([]Chain, error) {
+	req := h.newNetlinkRequest(unix.RTM_GETCHAIN, unix.NLM_F_DUMP)
+	index := int32(0)
+	if link != nil {
+		base := link.Attrs()
+		h.ensureIndex(base)
+		index = int32(base.Index)
+	}
+	msg := &nl.TcMsg{
+		Family:  nl.FAMILY_ALL,
+		Ifindex: index,
+		Parent:  parent,
+	}
+	req.AddData(msg)
+
+	msgs, err := req.Execute(unix.NETLINK_ROUTE, unix.RTM_NEWCHAIN)
+	if err != nil {
+		return nil, err
+	}
+
+	var res []Chain
+	for _, m := range msgs {
+		msg := nl.DeserializeTcMsg(m)
+
+		attrs, err := nl.ParseRouteAttr(m[msg.Len():])
+		if err != nil {
+			return nil, err
+		}
+
+		// skip chains from other interfaces
+		if link != nil && msg.Ifindex != index {
+			continue
+		}
+
+		var chain Chain
+		for _, attr := range attrs {
+			switch attr.Attr.Type {
+			case nl.TCA_CHAIN:
+				chain.Chain = native.Uint32(attr.Value)
+				chain.Parent = parent
+			}
+		}
+		res = append(res, chain)
+	}
+
+	return res, nil
+}