1 files changed, 43 insertions, 0 deletions
diff --git a/cmd/podman/common/util.go b/cmd/podman/common/util.go
new file mode 100644
index 000000000..47bbe12fa
--- /dev/null
+++ b/cmd/podman/common/util.go
@@ -0,0 +1,43 @@
+package common
+
+import (
+	"strconv"
+
+	"github.com/cri-o/ocicni/pkg/ocicni"
+	"github.com/docker/go-connections/nat"
+	"github.com/pkg/errors"
+)
+
+// createPortBindings iterates ports mappings and exposed ports into a format CNI understands
+func createPortBindings(ports []string) ([]ocicni.PortMapping, error) {
+	// TODO wants someone to rewrite this code in the future
+	var portBindings []ocicni.PortMapping
+	// The conversion from []string to natBindings is temporary while mheon reworks the port
+	// deduplication code.  Eventually that step will not be required.
+	_, natBindings, err := nat.ParsePortSpecs(ports)
+	if err != nil {
+		return nil, err
+	}
+	for containerPb, hostPb := range natBindings {
+		var pm ocicni.PortMapping
+		pm.ContainerPort = int32(containerPb.Int())
+		for _, i := range hostPb {
+			var hostPort int
+			var err error
+			pm.HostIP = i.HostIP
+			if i.HostPort == "" {
+				hostPort = containerPb.Int()
+			} else {
+				hostPort, err = strconv.Atoi(i.HostPort)
+				if err != nil {
+					return nil, errors.Wrapf(err, "unable to convert host port to integer")
+				}
+			}
+
+			pm.HostPort = int32(hostPort)
+			pm.Protocol = containerPb.Proto()
+			portBindings = append(portBindings, pm)
+		}
+	}
+	return portBindings, nil
+}