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package namespaces
import (
"strings"
)
// CgroupMode represents cgroup mode in the container.
type CgroupMode string
// IsHost indicates whether the container uses the host's cgroup.
func (n CgroupMode) IsHost() bool {
return n == "host"
}
// IsNS indicates a cgroup namespace passed in by path (ns:<path>)
func (n CgroupMode) IsNS() bool {
return strings.HasPrefix(string(n), "ns:")
}
// NS gets the path associated with a ns:<path> cgroup ns
func (n CgroupMode) NS() string {
parts := strings.SplitN(string(n), ":", 2)
if len(parts) > 1 {
return parts[1]
}
return ""
}
// IsContainer indicates whether the container uses a new cgroup namespace.
func (n CgroupMode) IsContainer() bool {
parts := strings.SplitN(string(n), ":", 2)
return len(parts) > 1 && parts[0] == "container"
}
// Container returns the name of the container whose cgroup namespace is going to be used.
func (n CgroupMode) Container() string {
parts := strings.SplitN(string(n), ":", 2)
if len(parts) > 1 {
return parts[1]
}
return ""
}
// IsPrivate indicates whether the container uses the a private cgroup.
func (n CgroupMode) IsPrivate() bool {
return n == "private"
}
// Valid indicates whether the Cgroup namespace is valid.
func (n CgroupMode) Valid() bool {
parts := strings.Split(string(n), ":")
switch mode := parts[0]; mode {
case "", "host", "private", "ns":
case "container":
if len(parts) != 2 || parts[1] == "" {
return false
}
default:
return false
}
return true
}
// UsernsMode represents userns mode in the container.
type UsernsMode string
// IsHost indicates whether the container uses the host's userns.
func (n UsernsMode) IsHost() bool {
return n == "host"
}
// IsKeepID indicates whether container uses a mapping where the (uid, gid) on the host is lept inside of the namespace.
func (n UsernsMode) IsKeepID() bool {
return n == "keep-id"
}
// IsPrivate indicates whether the container uses the a private userns.
func (n UsernsMode) IsPrivate() bool {
return !(n.IsHost())
}
// Valid indicates whether the userns is valid.
func (n UsernsMode) Valid() bool {
parts := strings.Split(string(n), ":")
switch mode := parts[0]; mode {
case "", "host", "keep-id":
default:
return false
}
return true
}
// IsContainer indicates whether container uses a container userns.
func (n UsernsMode) IsContainer() bool {
return false
}
// Container is the id of the container which network this container is connected to.
func (n UsernsMode) Container() string {
return ""
}
// UTSMode represents the UTS namespace of the container.
type UTSMode string
// IsPrivate indicates whether the container uses its private UTS namespace.
func (n UTSMode) IsPrivate() bool {
return !(n.IsHost())
}
// IsHost indicates whether the container uses the host's UTS namespace.
func (n UTSMode) IsHost() bool {
return n == "host"
}
// IsContainer indicates whether the container uses a container's UTS namespace.
func (n UTSMode) IsContainer() bool {
parts := strings.SplitN(string(n), ":", 2)
return len(parts) > 1 && parts[0] == "container"
}
// Container returns the name of the container whose uts namespace is going to be used.
func (n UTSMode) Container() string {
parts := strings.SplitN(string(n), ":", 2)
if len(parts) > 1 {
return parts[1]
}
return ""
}
// Valid indicates whether the UTS namespace is valid.
func (n UTSMode) Valid() bool {
parts := strings.Split(string(n), ":")
switch mode := parts[0]; mode {
case "", "host":
case "container":
if len(parts) != 2 || parts[1] == "" {
return false
}
default:
return false
}
return true
}
// IpcMode represents the container ipc stack.
type IpcMode string
// IsPrivate indicates whether the container uses its own private ipc namespace which cannot be shared.
func (n IpcMode) IsPrivate() bool {
return n == "private"
}
// IsHost indicates whether the container shares the host's ipc namespace.
func (n IpcMode) IsHost() bool {
return n == "host"
}
// IsShareable indicates whether the container's ipc namespace can be shared with another container.
func (n IpcMode) IsShareable() bool {
return n == "shareable"
}
// IsContainer indicates whether the container uses another container's ipc namespace.
func (n IpcMode) IsContainer() bool {
parts := strings.SplitN(string(n), ":", 2)
return len(parts) > 1 && parts[0] == "container"
}
// IsNone indicates whether container IpcMode is set to "none".
func (n IpcMode) IsNone() bool {
return n == "none"
}
// IsEmpty indicates whether container IpcMode is empty
func (n IpcMode) IsEmpty() bool {
return n == ""
}
// Valid indicates whether the ipc mode is valid.
func (n IpcMode) Valid() bool {
return n.IsEmpty() || n.IsNone() || n.IsPrivate() || n.IsHost() || n.IsShareable() || n.IsContainer()
}
// Container returns the name of the container ipc stack is going to be used.
func (n IpcMode) Container() string {
parts := strings.SplitN(string(n), ":", 2)
if len(parts) > 1 && parts[0] == "container" {
return parts[1]
}
return ""
}
// PidMode represents the pid namespace of the container.
type PidMode string
// IsPrivate indicates whether the container uses its own new pid namespace.
func (n PidMode) IsPrivate() bool {
return !(n.IsHost() || n.IsContainer())
}
// IsHost indicates whether the container uses the host's pid namespace.
func (n PidMode) IsHost() bool {
return n == "host"
}
// IsContainer indicates whether the container uses a container's pid namespace.
func (n PidMode) IsContainer() bool {
parts := strings.SplitN(string(n), ":", 2)
return len(parts) > 1 && parts[0] == "container"
}
// Valid indicates whether the pid namespace is valid.
func (n PidMode) Valid() bool {
parts := strings.Split(string(n), ":")
switch mode := parts[0]; mode {
case "", "host":
case "container":
if len(parts) != 2 || parts[1] == "" {
return false
}
default:
return false
}
return true
}
// Container returns the name of the container whose pid namespace is going to be used.
func (n PidMode) Container() string {
parts := strings.SplitN(string(n), ":", 2)
if len(parts) > 1 {
return parts[1]
}
return ""
}
// NetworkMode represents the container network stack.
type NetworkMode string
// IsNone indicates whether container isn't using a network stack.
func (n NetworkMode) IsNone() bool {
return n == "none"
}
// IsHost indicates whether the container uses the host's network stack.
func (n NetworkMode) IsHost() bool {
return n == "host"
}
// IsDefault indicates whether container uses the default network stack.
func (n NetworkMode) IsDefault() bool {
return n == "default"
}
// IsPrivate indicates whether container uses its private network stack.
func (n NetworkMode) IsPrivate() bool {
return !(n.IsHost() || n.IsContainer())
}
// IsContainer indicates whether container uses a container network stack.
func (n NetworkMode) IsContainer() bool {
parts := strings.SplitN(string(n), ":", 2)
return len(parts) > 1 && parts[0] == "container"
}
// Container is the id of the container which network this container is connected to.
func (n NetworkMode) Container() string {
parts := strings.SplitN(string(n), ":", 2)
if len(parts) > 1 {
return parts[1]
}
return ""
}
//UserDefined indicates user-created network
func (n NetworkMode) UserDefined() string {
if n.IsUserDefined() {
return string(n)
}
return ""
}
// IsBridge indicates whether container uses the bridge network stack
func (n NetworkMode) IsBridge() bool {
return n == "bridge"
}
// IsSlirp4netns indicates if we are running a rootless network stack
func (n NetworkMode) IsSlirp4netns() bool {
return n == "slirp4netns"
}
// IsNS indicates a network namespace passed in by path (ns:<path>)
func (n NetworkMode) IsNS() bool {
return strings.HasPrefix(string(n), "ns:")
}
// NS gets the path associated with a ns:<path> network ns
func (n NetworkMode) NS() string {
parts := strings.SplitN(string(n), ":", 2)
if len(parts) > 1 {
return parts[1]
}
return ""
}
// IsPod returns whether the network refers to pod networking
func (n NetworkMode) IsPod() bool {
return n == "pod"
}
// IsUserDefined indicates user-created network
func (n NetworkMode) IsUserDefined() bool {
return !n.IsDefault() && !n.IsBridge() && !n.IsHost() && !n.IsNone() && !n.IsContainer() && !n.IsSlirp4netns() && !n.IsNS()
}
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