forked from moby/libnetwork
/
ovrouter.go
165 lines (138 loc) · 3.7 KB
/
ovrouter.go
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package main
import (
"fmt"
"net"
"os"
"os/signal"
"github.com/docker/docker/pkg/reexec"
"github.com/docker/libnetwork/driverapi"
"github.com/docker/libnetwork/drivers/overlay"
"github.com/docker/libnetwork/netlabel"
"github.com/docker/libnetwork/types"
"github.com/vishvananda/netlink"
)
type router struct {
d driverapi.Driver
}
type endpoint struct {
addr *net.IPNet
mac net.HardwareAddr
name string
}
func (r *router) RegisterDriver(name string, driver driverapi.Driver, c driverapi.Capability) error {
r.d = driver
return nil
}
func (ep *endpoint) Interface() driverapi.InterfaceInfo {
return nil
}
func (ep *endpoint) SetMacAddress(mac net.HardwareAddr) error {
if ep.mac != nil {
return types.ForbiddenErrorf("endpoint interface MAC address present (%s). Cannot be modified with %s.", ep.mac, mac)
}
if mac == nil {
return types.BadRequestErrorf("tried to set nil MAC address to endpoint interface")
}
ep.mac = types.GetMacCopy(mac)
return nil
}
func (ep *endpoint) SetIPAddress(address *net.IPNet) error {
if address.IP == nil {
return types.BadRequestErrorf("tried to set nil IP address to endpoint interface")
}
if address.IP.To4() == nil {
return types.NotImplementedErrorf("do not support ipv6 yet")
}
if ep.addr != nil {
return types.ForbiddenErrorf("endpoint interface IP present (%s). Cannot be modified with %s.", ep.addr, address)
}
ep.addr = types.GetIPNetCopy(address)
return nil
}
func (ep *endpoint) MacAddress() net.HardwareAddr {
return types.GetMacCopy(ep.mac)
}
func (ep *endpoint) Address() *net.IPNet {
return types.GetIPNetCopy(ep.addr)
}
func (ep *endpoint) AddressIPv6() *net.IPNet {
return nil
}
func (ep *endpoint) InterfaceName() driverapi.InterfaceNameInfo {
return ep
}
func (ep *endpoint) SetNames(srcName, dstPrefix string) error {
ep.name = srcName
return nil
}
func (ep *endpoint) SetGateway(net.IP) error {
return nil
}
func (ep *endpoint) SetGatewayIPv6(net.IP) error {
return nil
}
func (ep *endpoint) AddStaticRoute(destination *net.IPNet, routeType int,
nextHop net.IP) error {
return nil
}
func (ep *endpoint) DisableGatewayService() {}
func main() {
if reexec.Init() {
return
}
opt := make(map[string]interface{})
if len(os.Args) > 1 {
opt[netlabel.OverlayBindInterface] = os.Args[1]
}
if len(os.Args) > 2 {
opt[netlabel.OverlayNeighborIP] = os.Args[2]
}
if len(os.Args) > 3 {
opt[netlabel.GlobalKVProvider] = os.Args[3]
}
if len(os.Args) > 4 {
opt[netlabel.GlobalKVProviderURL] = os.Args[4]
}
r := &router{}
if err := overlay.Init(r, opt); err != nil {
fmt.Printf("Failed to initialize overlay driver: %v\n", err)
os.Exit(1)
}
if err := r.d.CreateNetwork("testnetwork",
map[string]interface{}{}, nil, nil); err != nil {
fmt.Printf("Failed to create network in the driver: %v\n", err)
os.Exit(1)
}
ep := &endpoint{}
if err := r.d.CreateEndpoint("testnetwork", "testep",
ep, map[string]interface{}{}); err != nil {
fmt.Printf("Failed to create endpoint in the driver: %v\n", err)
os.Exit(1)
}
if err := r.d.Join("testnetwork", "testep",
"", ep, map[string]interface{}{}); err != nil {
fmt.Printf("Failed to join an endpoint in the driver: %v\n", err)
os.Exit(1)
}
link, err := netlink.LinkByName(ep.name)
if err != nil {
fmt.Printf("Failed to find the container interface with name %s: %v\n",
ep.name, err)
os.Exit(1)
}
ipAddr := &netlink.Addr{IPNet: ep.addr, Label: ""}
if err := netlink.AddrAdd(link, ipAddr); err != nil {
fmt.Printf("Failed to add address to the interface: %v\n", err)
os.Exit(1)
}
sigCh := make(chan os.Signal, 1)
signal.Notify(sigCh, os.Interrupt, os.Kill)
for {
select {
case <-sigCh:
r.d.Leave("testnetwork", "testep")
overlay.Fini(r.d)
os.Exit(0)
}
}
}