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sandbox.go
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sandbox.go
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// Package osl describes structures and interfaces which abstract os entities
package osl
import (
"net"
"github.com/docker/docker/libnetwork/types"
)
// SandboxType specify the time of the sandbox, this can be used to apply special configs
type SandboxType int
const (
// SandboxTypeIngress indicates that the sandbox is for the ingress
SandboxTypeIngress = iota
// SandboxTypeLoadBalancer indicates that the sandbox is a load balancer
SandboxTypeLoadBalancer = iota
)
// IfaceOption is a function option type to set interface options.
type IfaceOption func(i *nwIface)
// NeighOption is a function option type to set neighbor options.
type NeighOption func(nh *neigh)
// Sandbox represents a network sandbox, identified by a specific key. It
// holds a list of Interfaces, routes etc, and more can be added dynamically.
type Sandbox interface {
// Key returns the path where the network namespace is mounted.
Key() string
// AddInterface adds an existing Interface to this sandbox. The operation will rename
// from the Interface SrcName to DstName as it moves, and reconfigure the
// interface according to the specified settings. The caller is expected
// to only provide a prefix for DstName. The AddInterface api will auto-generate
// an appropriate suffix for the DstName to disambiguate.
AddInterface(SrcName string, DstPrefix string, options ...IfaceOption) error
// SetGateway sets the default IPv4 gateway for the sandbox.
SetGateway(gw net.IP) error
// SetGatewayIPv6 sets the default IPv6 gateway for the sandbox.
SetGatewayIPv6(gw net.IP) error
// UnsetGateway the previously set default IPv4 gateway in the sandbox.
UnsetGateway() error
// UnsetGatewayIPv6 unsets the previously set default IPv6 gateway in the sandbox.
UnsetGatewayIPv6() error
// GetLoopbackIfaceName returns the name of the loopback interface
GetLoopbackIfaceName() string
// AddAliasIP adds the passed IP address to the named interface
AddAliasIP(ifName string, ip *net.IPNet) error
// RemoveAliasIP removes the passed IP address from the named interface
RemoveAliasIP(ifName string, ip *net.IPNet) error
// DisableARPForVIP disables ARP replies and requests for VIP addresses
// on a particular interface.
DisableARPForVIP(ifName string) error
// AddStaticRoute adds a static route to the sandbox.
AddStaticRoute(*types.StaticRoute) error
// RemoveStaticRoute removes a static route from the sandbox.
RemoveStaticRoute(*types.StaticRoute) error
// AddNeighbor adds a neighbor entry into the sandbox.
AddNeighbor(dstIP net.IP, dstMac net.HardwareAddr, force bool, option ...NeighOption) error
// DeleteNeighbor deletes neighbor entry from the sandbox.
DeleteNeighbor(dstIP net.IP, dstMac net.HardwareAddr, osDelete bool) error
// NeighborOptions returns an interface with methods to set neighbor options.
NeighborOptions() NeighborOptionSetter
// InterfaceOptions an interface with methods to set interface options.
InterfaceOptions() IfaceOptionSetter
// InvokeFunc invoke a function in the network namespace.
InvokeFunc(func()) error
// Info returns an interface with methods to get sandbox state.
Info() Info
// Destroy destroys the sandbox.
Destroy() error
// Restore restores the sandbox.
Restore(ifsopt map[string][]IfaceOption, routes []*types.StaticRoute, gw net.IP, gw6 net.IP) error
// ApplyOSTweaks applies operating system specific knobs on the sandbox.
ApplyOSTweaks([]SandboxType)
}
// NeighborOptionSetter interface defines the option setter methods for interface options
type NeighborOptionSetter interface {
// LinkName returns an option setter to set the srcName of the link that should
// be used in the neighbor entry
LinkName(string) NeighOption
// Family returns an option setter to set the address family for the neighbor
// entry. eg. AF_BRIDGE
Family(int) NeighOption
}
// IfaceOptionSetter interface defines the option setter methods for interface options.
type IfaceOptionSetter interface {
// Bridge returns an option setter to set if the interface is a bridge.
Bridge(bool) IfaceOption
// MacAddress returns an option setter to set the MAC address.
MacAddress(net.HardwareAddr) IfaceOption
// Address returns an option setter to set IPv4 address.
Address(*net.IPNet) IfaceOption
// AddressIPv6 returns an option setter to set IPv6 address.
AddressIPv6(*net.IPNet) IfaceOption
// LinkLocalAddresses returns an option setter to set the link-local IP addresses.
LinkLocalAddresses([]*net.IPNet) IfaceOption
// Master returns an option setter to set the master interface if any for this
// interface. The master interface name should refer to the srcname of a
// previously added interface of type bridge.
Master(string) IfaceOption
// Routes returns an option setter to set interface routes.
Routes([]*net.IPNet) IfaceOption
}
// Info represents all possible information that
// the driver wants to place in the sandbox which includes
// interfaces, routes and gateway
type Info interface {
// Interfaces returns the collection of Interface previously added with the AddInterface
// method. Note that this doesn't include network interfaces added in any
// other way (such as the default loopback interface which is automatically
// created on creation of a sandbox).
Interfaces() []Interface
// Gateway returns the IPv4 gateway for the sandbox.
Gateway() net.IP
// GatewayIPv6 returns the IPv6 gateway for the sandbox.
GatewayIPv6() net.IP
// StaticRoutes returns additional static routes for the sandbox. Note that
// directly connected routes are stored on the particular interface they
// refer to.
StaticRoutes() []*types.StaticRoute
// TODO: Add ip tables etc.
}
// Interface represents the settings and identity of a network device. It is
// used as a return type for Network.Link, and it is common practice for the
// caller to use this information when moving interface SrcName from host
// namespace to DstName in a different net namespace with the appropriate
// network settings.
type Interface interface {
// SrcName returns the name of the interface in the origin network namespace.
SrcName() string
// DstName returns the name that will be assigned to the interface once
// moved inside a network namespace. When the caller passes in a DstName,
// it is only expected to pass a prefix. The name will be modified with an
// auto-generated suffix.
DstName() string
// Address returns the IPv4 address for the interface.
Address() *net.IPNet
// AddressIPv6 returns the IPv6 address for the interface.
AddressIPv6() *net.IPNet
// LinkLocalAddresses returns the link-local IP addresses assigned to the
// interface.
LinkLocalAddresses() []*net.IPNet
// Routes returns IP routes for the interface.
Routes() []*net.IPNet
// Bridge returns true if the interface is a bridge.
Bridge() bool
// Master returns the srcname of the master interface for this interface.
Master() string
// Remove an interface from the sandbox by renaming to original name
// and moving it out of the sandbox.
Remove() error
// Statistics returns the statistics for this interface
Statistics() (*types.InterfaceStatistics, error)
}