Split libpod/network package

The `libpod/network` package should only be used on the backend and not the
client. The client used this package only for two functions so move them
into a new `pkg/network` package.

This is needed so we can put linux only code into `libpod/network`, see #9710.

[NO TESTS NEEDED]

Signed-off-by: Paul Holzinger <paul.holzinger@web.de>

4 files changed, 31 insertions, 3 deletions

diff --git a/pkg/api/handlers/compat/networks.go b/pkg/api/handlers/compat/networks.go
index 28e90ac28..dfb1d7fda 100644
--- a/pkg/api/handlers/compat/networks.go
+++ b/pkg/api/handlers/compat/networks.go
@@ -16,6 +16,7 @@ import (
 	"github.com/containers/podman/v3/pkg/api/handlers/utils"
 	"github.com/containers/podman/v3/pkg/domain/entities"
 	"github.com/containers/podman/v3/pkg/domain/infra/abi"
+	networkid "github.com/containers/podman/v3/pkg/network"
 	"github.com/docker/docker/api/types"
 	dockerNetwork "github.com/docker/docker/api/types/network"
 	"github.com/gorilla/schema"
@@ -135,7 +136,7 @@ func getNetworkResourceByNameOrID(nameOrID string, runtime *libpod.Runtime, filt
 
 	report := types.NetworkResource{
 		Name:       conf.Name,
-		ID:         network.GetNetworkID(conf.Name),
+		ID:         networkid.GetNetworkID(conf.Name),
 		Created:    time.Unix(int64(stat.Ctim.Sec), int64(stat.Ctim.Nsec)), // nolint: unconvert
 		Scope:      "local",
 		Driver:     network.DefaultNetworkDriver,
diff --git a/pkg/domain/filters/containers.go b/pkg/domain/filters/containers.go
index 6f4b4e8a0..98b8f7e88 100644
--- a/pkg/domain/filters/containers.go
+++ b/pkg/domain/filters/containers.go
@@ -7,7 +7,7 @@ import (
 
 	"github.com/containers/podman/v3/libpod"
 	"github.com/containers/podman/v3/libpod/define"
-	"github.com/containers/podman/v3/libpod/network"
+	"github.com/containers/podman/v3/pkg/network"
 	"github.com/containers/podman/v3/pkg/timetype"
 	"github.com/containers/podman/v3/pkg/util"
 	"github.com/pkg/errors"
diff --git a/pkg/domain/filters/pods.go b/pkg/domain/filters/pods.go
index 53d10213a..0490a4848 100644
--- a/pkg/domain/filters/pods.go
+++ b/pkg/domain/filters/pods.go
@@ -6,7 +6,7 @@ import (
 
 	"github.com/containers/podman/v3/libpod"
 	"github.com/containers/podman/v3/libpod/define"
-	"github.com/containers/podman/v3/libpod/network"
+	"github.com/containers/podman/v3/pkg/network"
 	"github.com/containers/podman/v3/pkg/util"
 	"github.com/pkg/errors"
 )
diff --git a/pkg/network/network.go b/pkg/network/network.go
new file mode 100644
index 000000000..44132ca28
--- /dev/null
+++ b/pkg/network/network.go
@@ -0,0 +1,27 @@
+package network
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"strings"
+
+	"github.com/containernetworking/cni/libcni"
+)
+
+// GetCNIPlugins returns a list of plugins that a given network
+// has in the form of a string
+func GetCNIPlugins(list *libcni.NetworkConfigList) string {
+	plugins := make([]string, 0, len(list.Plugins))
+	for _, plug := range list.Plugins {
+		plugins = append(plugins, plug.Network.Type)
+	}
+	return strings.Join(plugins, ",")
+}
+
+// GetNetworkID return the network ID for a given name.
+// It is just the sha256 hash but this should be good enough.
+// The caller has to make sure it is only called with the network name.
+func GetNetworkID(name string) string {
+	hash := sha256.Sum256([]byte(name))
+	return hex.EncodeToString(hash[:])
+}