Make networking code reusable

To prevent code duplication when creating new network backends move
reusable code into a separate internal package.

This allows all network backends to use the same code as long as they
implement the new NetUtil interface.

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/libpod/network/internal/util/interface.go b/libpod/network/internal/util/interface.go
new file mode 100644
index 000000000..4b01a09b8
--- /dev/null
+++ b/libpod/network/internal/util/interface.go
@@ -0,0 +1,19 @@
+package util
+
+import "github.com/containers/podman/v3/libpod/network/types"
+
+// This is a helper package to allow code sharing between the different
+// network interfaces.
+
+// NetUtil is a helper interface which all network interfaces should implement to allow easy code sharing
+type NetUtil interface {
+	// ForEach eaxecutes the given function for each network
+	ForEach(func(types.Network))
+	// Len returns the number of networks
+	Len() int
+	// DefaultInterfaceName return the default interface name, this will be suffixed by a number
+	DefaultInterfaceName() string
+	// Network returns the network with the given name or ID.
+	// It returns an error if the network is not found
+	Network(nameOrID string) (*types.Network, error)
+}