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>

11 files changed, 63 insertions, 29 deletions

diff --git a/cmd/podman/networks/list.go b/cmd/podman/networks/list.go
index 2181f850b..fcbcb6722 100644
--- a/cmd/podman/networks/list.go
+++ b/cmd/podman/networks/list.go
@@ -12,8 +12,8 @@ import (
 	"github.com/containers/podman/v3/cmd/podman/common"
 	"github.com/containers/podman/v3/cmd/podman/registry"
 	"github.com/containers/podman/v3/cmd/podman/validate"
-	"github.com/containers/podman/v3/libpod/network"
 	"github.com/containers/podman/v3/pkg/domain/entities"
+	"github.com/containers/podman/v3/pkg/network"
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
diff --git a/libpod/network/files.go b/libpod/network/files.go
index fe483e25c..d876113f9 100644
--- a/libpod/network/files.go
+++ b/libpod/network/files.go
@@ -11,6 +11,7 @@ import (
 	"github.com/containernetworking/plugins/plugins/ipam/host-local/backend/allocator"
 	"github.com/containers/common/pkg/config"
 	"github.com/containers/podman/v3/libpod/define"
+	"github.com/containers/podman/v3/pkg/network"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 )
@@ -67,7 +68,7 @@ func GetCNIConfigPathByNameOrID(config *config.Config, name string) (string, err
 		if conf.Name == name {
 			return confFile, nil
 		}
-		if strings.HasPrefix(GetNetworkID(conf.Name), name) {
+		if strings.HasPrefix(network.GetNetworkID(conf.Name), name) {
 			idMatch++
 			file = confFile
 		}
@@ -92,16 +93,6 @@ func ReadRawCNIConfByNameOrID(config *config.Config, name string) ([]byte, error
 	return b, err
 }
 
-// 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, ",")
-}
-
 // GetNetworkLabels returns a list of labels as a string
 func GetNetworkLabels(list *libcni.NetworkConfigList) NcLabels {
 	cniJSON := make(map[string]interface{})
diff --git a/libpod/network/netconflist.go b/libpod/network/netconflist.go
index 1a1583587..a45a4109a 100644
--- a/libpod/network/netconflist.go
+++ b/libpod/network/netconflist.go
@@ -7,6 +7,7 @@ import (
 	"strings"
 
 	"github.com/containernetworking/cni/libcni"
+	"github.com/containers/podman/v3/pkg/network"
 	"github.com/containers/podman/v3/pkg/util"
 	"github.com/pkg/errors"
 )
@@ -211,7 +212,7 @@ func IfPassesFilter(netconf *libcni.NetworkConfigList, filters map[string][]stri
 
 		case "plugin":
 			// match one plugin
-			plugins := GetCNIPlugins(netconf)
+			plugins := network.GetCNIPlugins(netconf)
 			for _, val := range filterValues {
 				if strings.Contains(plugins, val) {
 					result = true
@@ -243,7 +244,7 @@ func IfPassesFilter(netconf *libcni.NetworkConfigList, filters map[string][]stri
 		case "driver":
 			// matches only for the DefaultNetworkDriver
 			for _, filterValue := range filterValues {
-				plugins := GetCNIPlugins(netconf)
+				plugins := network.GetCNIPlugins(netconf)
 				if filterValue == DefaultNetworkDriver &&
 					strings.Contains(plugins, DefaultNetworkDriver) {
 					result = true
@@ -253,7 +254,7 @@ func IfPassesFilter(netconf *libcni.NetworkConfigList, filters map[string][]stri
 		case "id":
 			// matches part of one id
 			for _, filterValue := range filterValues {
-				if strings.Contains(GetNetworkID(netconf.Name), filterValue) {
+				if strings.Contains(network.GetNetworkID(netconf.Name), filterValue) {
 					result = true
 					break
 				}
diff --git a/libpod/network/network.go b/libpod/network/network.go
index f19a764ef..ed4e6388a 100644
--- a/libpod/network/network.go
+++ b/libpod/network/network.go
@@ -1,8 +1,6 @@
 package network
 
 import (
-	"crypto/sha256"
-	"encoding/hex"
 	"encoding/json"
 	"net"
 	"os"
@@ -245,13 +243,6 @@ func Exists(config *config.Config, name string) (bool, error) {
 	return true, nil
 }
 
-// GetNetworkID return the network ID for a given name.
-// It is just the sha256 hash but this should be good enough.
-func GetNetworkID(name string) string {
-	hash := sha256.Sum256([]byte(name))
-	return hex.EncodeToString(hash[:])
-}
-
 // PruneNetworks removes networks that are not being used and that is not the default
 // network.  To keep proper fencing for imports, you must provide the used networks
 // to this function as a map.  the key is meaningful in the map, the book is a no-op
diff --git a/libpod/runtime_ctr.go b/libpod/runtime_ctr.go
index 19690d79b..057313c82 100644
--- a/libpod/runtime_ctr.go
+++ b/libpod/runtime_ctr.go
@@ -12,7 +12,6 @@ import (
 	"github.com/containers/common/pkg/config"
 	"github.com/containers/podman/v3/libpod/define"
 	"github.com/containers/podman/v3/libpod/events"
-	"github.com/containers/podman/v3/libpod/network"
 	"github.com/containers/podman/v3/libpod/shutdown"
 	"github.com/containers/podman/v3/pkg/cgroups"
 	"github.com/containers/podman/v3/pkg/domain/entities/reports"
@@ -204,7 +203,7 @@ func (r *Runtime) setupContainer(ctx context.Context, ctr *Container) (_ *Contai
 	if len(ctr.config.Networks) > 0 {
 		netNames := make([]string, 0, len(ctr.config.Networks))
 		for _, nameOrID := range ctr.config.Networks {
-			netName, err := network.NormalizeName(r.config, nameOrID)
+			netName, err := normalizeNetworkName(r.config, nameOrID)
 			if err != nil {
 				return nil, err
 			}
diff --git a/libpod/runtime_ctr_network.go b/libpod/runtime_ctr_network.go
new file mode 100644
index 000000000..51ed982e2
--- /dev/null
+++ b/libpod/runtime_ctr_network.go
@@ -0,0 +1,12 @@
+// +build linux
+
+package libpod
+
+import (
+	"github.com/containers/common/pkg/config"
+	"github.com/containers/podman/v3/libpod/network"
+)
+
+func normalizeNetworkName(config *config.Config, nameOrID string) (string, error) {
+	return network.NormalizeName(config, nameOrID)
+}
diff --git a/libpod/runtime_ctr_network_unsupported.go b/libpod/runtime_ctr_network_unsupported.go
new file mode 100644
index 000000000..fb7e802ac
--- /dev/null
+++ b/libpod/runtime_ctr_network_unsupported.go
@@ -0,0 +1,12 @@
+// +build !linux
+
+package libpod
+
+import (
+	"github.com/containers/common/pkg/config"
+	"github.com/containers/podman/v3/libpod/define"
+)
+
+func normalizeNetworkName(config *config.Config, nameOrID string) (string, error) {
+	return "", define.ErrNotImplemented
+}
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[:])
+}