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|
//go:build linux
// +build linux
package overlay
import (
"encoding/json"
"fmt"
"net"
"github.com/docker/docker/libnetwork/datastore"
"github.com/docker/docker/libnetwork/driverapi"
"github.com/docker/docker/libnetwork/netutils"
"github.com/docker/docker/libnetwork/ns"
"github.com/docker/docker/libnetwork/types"
"github.com/sirupsen/logrus"
)
type endpointTable map[string]*endpoint
const overlayEndpointPrefix = "overlay/endpoint"
type endpoint struct {
id string
nid string
ifName string
mac net.HardwareAddr
addr *net.IPNet
dbExists bool
dbIndex uint64
}
func (n *network) endpoint(eid string) *endpoint {
n.Lock()
defer n.Unlock()
return n.endpoints[eid]
}
func (n *network) addEndpoint(ep *endpoint) {
n.Lock()
n.endpoints[ep.id] = ep
n.Unlock()
}
func (n *network) deleteEndpoint(eid string) {
n.Lock()
delete(n.endpoints, eid)
n.Unlock()
}
func (d *driver) CreateEndpoint(nid, eid string, ifInfo driverapi.InterfaceInfo,
epOptions map[string]interface{}) error {
var err error
if err = validateID(nid, eid); err != nil {
return err
}
// Since we perform lazy configuration make sure we try
// configuring the driver when we enter CreateEndpoint since
// CreateNetwork may not be called in every node.
if err := d.configure(); err != nil {
return err
}
n := d.network(nid)
if n == nil {
return fmt.Errorf("network id %q not found", nid)
}
ep := &endpoint{
id: eid,
nid: n.id,
addr: ifInfo.Address(),
mac: ifInfo.MacAddress(),
}
if ep.addr == nil {
return fmt.Errorf("create endpoint was not passed interface IP address")
}
if s := n.getSubnetforIP(ep.addr); s == nil {
return fmt.Errorf("no matching subnet for IP %q in network %q", ep.addr, nid)
}
if ep.mac == nil {
ep.mac = netutils.GenerateMACFromIP(ep.addr.IP)
if err := ifInfo.SetMacAddress(ep.mac); err != nil {
return err
}
}
n.addEndpoint(ep)
return nil
}
func (d *driver) DeleteEndpoint(nid, eid string) error {
nlh := ns.NlHandle()
if err := validateID(nid, eid); err != nil {
return err
}
n := d.network(nid)
if n == nil {
return fmt.Errorf("network id %q not found", nid)
}
ep := n.endpoint(eid)
if ep == nil {
return fmt.Errorf("endpoint id %q not found", eid)
}
n.deleteEndpoint(eid)
if ep.ifName == "" {
return nil
}
link, err := nlh.LinkByName(ep.ifName)
if err != nil {
logrus.Debugf("Failed to retrieve interface (%s)'s link on endpoint (%s) delete: %v", ep.ifName, ep.id, err)
return nil
}
if err := nlh.LinkDel(link); err != nil {
logrus.Debugf("Failed to delete interface (%s)'s link on endpoint (%s) delete: %v", ep.ifName, ep.id, err)
}
return nil
}
func (d *driver) EndpointOperInfo(nid, eid string) (map[string]interface{}, error) {
return make(map[string]interface{}), nil
}
func (ep *endpoint) DataScope() string {
return datastore.LocalScope
}
func (ep *endpoint) New() datastore.KVObject {
return &endpoint{}
}
func (ep *endpoint) CopyTo(o datastore.KVObject) error {
dstep := o.(*endpoint)
*dstep = *ep
return nil
}
func (ep *endpoint) Key() []string {
return []string{overlayEndpointPrefix, ep.id}
}
func (ep *endpoint) KeyPrefix() []string {
return []string{overlayEndpointPrefix}
}
func (ep *endpoint) Index() uint64 {
return ep.dbIndex
}
func (ep *endpoint) SetIndex(index uint64) {
ep.dbIndex = index
ep.dbExists = true
}
func (ep *endpoint) Exists() bool {
return ep.dbExists
}
func (ep *endpoint) Skip() bool {
return false
}
func (ep *endpoint) Value() []byte {
b, err := json.Marshal(ep)
if err != nil {
return nil
}
return b
}
func (ep *endpoint) SetValue(value []byte) error {
return json.Unmarshal(value, ep)
}
func (ep *endpoint) MarshalJSON() ([]byte, error) {
epMap := make(map[string]interface{})
epMap["id"] = ep.id
epMap["nid"] = ep.nid
if ep.ifName != "" {
epMap["ifName"] = ep.ifName
}
if ep.addr != nil {
epMap["addr"] = ep.addr.String()
}
if len(ep.mac) != 0 {
epMap["mac"] = ep.mac.String()
}
return json.Marshal(epMap)
}
func (ep *endpoint) UnmarshalJSON(value []byte) error {
var (
err error
epMap map[string]interface{}
)
json.Unmarshal(value, &epMap)
ep.id = epMap["id"].(string)
ep.nid = epMap["nid"].(string)
if v, ok := epMap["mac"]; ok {
if ep.mac, err = net.ParseMAC(v.(string)); err != nil {
return types.InternalErrorf("failed to decode endpoint interface mac address after json unmarshal: %s", v.(string))
}
}
if v, ok := epMap["addr"]; ok {
if ep.addr, err = types.ParseCIDR(v.(string)); err != nil {
return types.InternalErrorf("failed to decode endpoint interface ipv4 address after json unmarshal: %v", err)
}
}
if v, ok := epMap["ifName"]; ok {
ep.ifName = v.(string)
}
return nil
}
|
