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package common
import (
"net"
"strings"
"github.com/containers/common/pkg/completion"
"github.com/containers/podman/v3/cmd/podman/parse"
"github.com/containers/podman/v3/libpod/define"
"github.com/containers/podman/v3/pkg/domain/entities"
"github.com/containers/podman/v3/pkg/specgen"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
func DefineNetFlags(cmd *cobra.Command) {
netFlags := cmd.Flags()
addHostFlagName := "add-host"
netFlags.StringSlice(
addHostFlagName, []string{},
"Add a custom host-to-IP mapping (host:ip) (default [])",
)
_ = cmd.RegisterFlagCompletionFunc(addHostFlagName, completion.AutocompleteNone)
dnsFlagName := "dns"
netFlags.StringSlice(
dnsFlagName, containerConfig.DNSServers(),
"Set custom DNS servers",
)
_ = cmd.RegisterFlagCompletionFunc(dnsFlagName, completion.AutocompleteNone)
dnsOptFlagName := "dns-opt"
netFlags.StringSlice(
dnsOptFlagName, containerConfig.DNSOptions(),
"Set custom DNS options",
)
_ = cmd.RegisterFlagCompletionFunc(dnsOptFlagName, completion.AutocompleteNone)
dnsSearchFlagName := "dns-search"
netFlags.StringSlice(
dnsSearchFlagName, containerConfig.DNSSearches(),
"Set custom DNS search domains",
)
_ = cmd.RegisterFlagCompletionFunc(dnsSearchFlagName, completion.AutocompleteNone)
ipFlagName := "ip"
netFlags.String(
ipFlagName, "",
"Specify a static IPv4 address for the container",
)
_ = cmd.RegisterFlagCompletionFunc(ipFlagName, completion.AutocompleteNone)
macAddressFlagName := "mac-address"
netFlags.String(
macAddressFlagName, "",
"Container MAC address (e.g. 92:d0:c6:0a:29:33)",
)
_ = cmd.RegisterFlagCompletionFunc(macAddressFlagName, completion.AutocompleteNone)
networkFlagName := "network"
netFlags.String(
networkFlagName, containerConfig.NetNS(),
"Connect a container to a network",
)
_ = cmd.RegisterFlagCompletionFunc(networkFlagName, AutocompleteNetworkFlag)
networkAliasFlagName := "network-alias"
netFlags.StringSlice(
networkAliasFlagName, []string{},
"Add network-scoped alias for the container",
)
_ = cmd.RegisterFlagCompletionFunc(networkAliasFlagName, completion.AutocompleteNone)
publishFlagName := "publish"
netFlags.StringSliceP(
publishFlagName, "p", []string{},
"Publish a container's port, or a range of ports, to the host (default [])",
)
_ = cmd.RegisterFlagCompletionFunc(publishFlagName, completion.AutocompleteNone)
netFlags.Bool(
"no-hosts", containerConfig.Containers.NoHosts,
"Do not create /etc/hosts within the container, instead use the version from the image",
)
}
// NetFlagsToNetOptions parses the network flags for the given cmd.
// The netnsFromConfig bool is used to indicate if the --network flag
// should always be parsed regardless if it was set on the cli.
func NetFlagsToNetOptions(cmd *cobra.Command, netnsFromConfig bool) (*entities.NetOptions, error) {
var (
err error
)
opts := entities.NetOptions{}
opts.AddHosts, err = cmd.Flags().GetStringSlice("add-host")
if err != nil {
return nil, err
}
// Verify the additional hosts are in correct format
for _, host := range opts.AddHosts {
if _, err := parse.ValidateExtraHost(host); err != nil {
return nil, err
}
}
if cmd.Flags().Changed("dns") {
servers, err := cmd.Flags().GetStringSlice("dns")
if err != nil {
return nil, err
}
for _, d := range servers {
if d == "none" {
opts.UseImageResolvConf = true
if len(servers) > 1 {
return nil, errors.Errorf("%s is not allowed to be specified with other DNS ip addresses", d)
}
break
}
dns := net.ParseIP(d)
if dns == nil {
return nil, errors.Errorf("%s is not an ip address", d)
}
opts.DNSServers = append(opts.DNSServers, dns)
}
}
if cmd.Flags().Changed("dns-opt") {
options, err := cmd.Flags().GetStringSlice("dns-opt")
if err != nil {
return nil, err
}
opts.DNSOptions = options
}
if cmd.Flags().Changed("dns-search") {
dnsSearches, err := cmd.Flags().GetStringSlice("dns-search")
if err != nil {
return nil, err
}
// Validate domains are good
for _, dom := range dnsSearches {
if dom == "." {
if len(dnsSearches) > 1 {
return nil, errors.Errorf("cannot pass additional search domains when also specifying '.'")
}
continue
}
if _, err := parse.ValidateDomain(dom); err != nil {
return nil, err
}
}
opts.DNSSearch = dnsSearches
}
m, err := cmd.Flags().GetString("mac-address")
if err != nil {
return nil, err
}
if len(m) > 0 {
mac, err := net.ParseMAC(m)
if err != nil {
return nil, err
}
opts.StaticMAC = &mac
}
inputPorts, err := cmd.Flags().GetStringSlice("publish")
if err != nil {
return nil, err
}
if len(inputPorts) > 0 {
opts.PublishPorts, err = CreatePortBindings(inputPorts)
if err != nil {
return nil, err
}
}
ip, err := cmd.Flags().GetString("ip")
if err != nil {
return nil, err
}
if ip != "" {
staticIP := net.ParseIP(ip)
if staticIP == nil {
return nil, errors.Errorf("%s is not an ip address", ip)
}
if staticIP.To4() == nil {
return nil, errors.Wrapf(define.ErrInvalidArg, "%s is not an IPv4 address", ip)
}
opts.StaticIP = &staticIP
}
opts.NoHosts, err = cmd.Flags().GetBool("no-hosts")
if err != nil {
return nil, err
}
// parse the --network value only when the flag is set or we need to use
// the netns config value, e.g. when --pod is not used
if netnsFromConfig || cmd.Flag("network").Changed {
network, err := cmd.Flags().GetString("network")
if err != nil {
return nil, err
}
parts := strings.SplitN(network, ":", 2)
ns, cniNets, err := specgen.ParseNetworkNamespace(network, containerConfig.Containers.RootlessNetworking == "cni")
if err != nil {
return nil, err
}
if len(parts) > 1 {
opts.NetworkOptions = make(map[string][]string)
opts.NetworkOptions[parts[0]] = strings.Split(parts[1], ",")
cniNets = nil
}
opts.Network = ns
opts.CNINetworks = cniNets
}
aliases, err := cmd.Flags().GetStringSlice("network-alias")
if err != nil {
return nil, err
}
if len(aliases) > 0 {
opts.Aliases = aliases
}
return &opts, err
}
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