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package common
import (
"fmt"
"strconv"
"github.com/spf13/cobra"
"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
}
// NoArgs returns an error if any args are included.
func NoArgs(cmd *cobra.Command, args []string) error {
if len(args) > 0 {
return fmt.Errorf("`%s` takes no arguments", cmd.CommandPath())
}
return nil
}
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