Add support for slirp network for pods

flag --network=slirp4netns[options] for root and rootless pods

Signed-off-by: Ashley Cui <acui@redhat.com>

4 files changed, 9 insertions, 2 deletions

diff --git a/pkg/domain/entities/pods.go b/pkg/domain/entities/pods.go
index 7b38dbd87..426419833 100644
--- a/pkg/domain/entities/pods.go
+++ b/pkg/domain/entities/pods.go
@@ -142,6 +142,7 @@ func (p PodCreateOptions) ToPodSpecGen(s *specgen.PodSpecGenerator) {
 	s.StaticMAC = p.Net.StaticMAC
 	s.PortMappings = p.Net.PublishPorts
 	s.CNINetworks = p.Net.CNINetworks
+	s.NetworkOptions = p.Net.NetworkOptions
 	if p.Net.UseImageResolvConf {
 		s.NoManageResolvConf = true
 	}
diff --git a/pkg/specgen/generate/pod_create.go b/pkg/specgen/generate/pod_create.go
index 101201252..43caf0fe9 100644
--- a/pkg/specgen/generate/pod_create.go
+++ b/pkg/specgen/generate/pod_create.go
@@ -99,6 +99,9 @@ func createPodOptions(p *specgen.PodSpecGenerator, rt *libpod.Runtime) ([]libpod
 	case specgen.Host:
 		logrus.Debugf("Pod will use host networking")
 		options = append(options, libpod.WithPodHostNetwork())
+	case specgen.Slirp:
+		logrus.Debugf("Pod will use slirp4netns")
+		options = append(options, libpod.WithPodSlirp4netns(p.NetworkOptions))
 	default:
 		return nil, errors.Errorf("pods presently do not support network mode %s", p.NetNS.NSMode)
 	}
diff --git a/pkg/specgen/pod_validate.go b/pkg/specgen/pod_validate.go
index 907c0bb69..a6c61a203 100644
--- a/pkg/specgen/pod_validate.go
+++ b/pkg/specgen/pod_validate.go
@@ -72,9 +72,9 @@ func (p *PodSpecGenerator) Validate() error {
 			return exclusivePodOptions("NoInfra", "NoManageResolvConf")
 		}
 	}
-	if p.NetNS.NSMode != "" && p.NetNS.NSMode != Bridge && p.NetNS.NSMode != Default {
+	if p.NetNS.NSMode != "" && p.NetNS.NSMode != Bridge && p.NetNS.NSMode != Slirp && p.NetNS.NSMode != Default {
 		if len(p.PortMappings) > 0 {
-			return errors.New("PortMappings can only be used with Bridge mode networking")
+			return errors.New("PortMappings can only be used with Bridge or slirp4netns networking")
 		}
 		if len(p.CNINetworks) > 0 {
 			return errors.New("CNINetworks can only be used with Bridge mode networking")
diff --git a/pkg/specgen/podspecgen.go b/pkg/specgen/podspecgen.go
index 3c32ec365..7d771f5bb 100644
--- a/pkg/specgen/podspecgen.go
+++ b/pkg/specgen/podspecgen.go
@@ -134,6 +134,9 @@ type PodNetworkConfig struct {
 	// Conflicts with NoInfra=true and NoManageHosts.
 	// Optional.
 	HostAdd []string `json:"hostadd,omitempty"`
+	// NetworkOptions are additional options for each network
+	// Optional.
+	NetworkOptions map[string][]string `json:"network_options,omitempty"`
 }
 
 // PodCgroupConfig contains configuration options about a pod's cgroups.