virtcontainers: Create a new package "types"

Instead of relying on the kata agent to define generic structures,
the logic is to define those as virtcontainers "types" package.
This way, all consumers of those structures, such as kata-runtime,
kata-netmon, and kata-containerd-shim, don't have to import some
dependency from the kata-agent.

Fixes #876

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

virtcontainers/pkg/types/types.go

@@ -0,0 +1,40 @@
+// Copyright 2018 Intel Corporation.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package types
+
+// IPAddress describes an IP address.
+type IPAddress struct {
+	Family  int
+	Address string
+	Mask    string
+}
+
+// Interface describes a network interface.
+type Interface struct {
+	Device      string
+	Name        string
+	IPAddresses []*IPAddress
+	Mtu         uint64
+	HwAddr      string
+	// pciAddr is the PCI address in the format  "bridgeAddr/deviceAddr".
+	// Here, bridgeAddr is the address at which the bridge is attached on the root bus,
+	// while deviceAddr is the address at which the network device is attached on the bridge.
+	PciAddr string
+	// LinkType defines the type of interface described by this structure.
+	// The expected values are the one that are defined by the netlink
+	// library, regarding each type of link. Here is a non exhaustive
+	// list: "veth", "macvtap", "vlan", "macvlan", "tap", ...
+	LinkType string
+}
+
+// Route describes a network route.
+type Route struct {
+	Dest    string
+	Gateway string
+	Device  string
+	Source  string
+	Scope   uint32
+}