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ipam.go
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ipam.go
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// SPDX-License-Identifier: Apache-2.0
// Copyright Authors of Cilium
package driver
import (
"encoding/json"
"fmt"
"net/http"
"github.com/docker/libnetwork/ipams/remote/api"
"github.com/cilium/cilium/pkg/client"
"github.com/cilium/cilium/pkg/logging/logfields"
)
const (
PoolIPv4 = "CiliumPoolv4"
PoolIPv6 = "CiliumPoolv6"
)
func (driver *driver) ipamCapabilities(w http.ResponseWriter, r *http.Request) {
err := json.NewEncoder(w).Encode(&api.GetCapabilityResponse{})
if err != nil {
log.WithError(err).Fatal("capabilities encode")
sendError(w, "encode error", http.StatusInternalServerError)
return
}
log.Debug("IPAM capabilities exchange complete")
}
func (driver *driver) getDefaultAddressSpaces(w http.ResponseWriter, r *http.Request) {
log.Debug("GetDefaultAddressSpaces Called")
resp := &api.GetAddressSpacesResponse{
LocalDefaultAddressSpace: "CiliumLocal",
GlobalDefaultAddressSpace: "CiliumGlobal",
}
log.WithField(logfields.Response, logfields.Repr(resp)).Debug("Get Default Address Spaces response")
objectResponse(w, resp)
}
func (driver *driver) getPoolResponse(req *api.RequestPoolRequest) *api.RequestPoolResponse {
addr := driver.conf.Addressing
if !req.V6 {
return &api.RequestPoolResponse{
PoolID: PoolIPv4,
Pool: "0.0.0.0/0",
Data: map[string]string{
"com.docker.network.gateway": addr.IPV4.IP + "/32",
},
}
}
return &api.RequestPoolResponse{
PoolID: PoolIPv6,
Pool: addr.IPV6.AllocRange,
Data: map[string]string{
"com.docker.network.gateway": addr.IPV6.IP + "/128",
},
}
}
func (driver *driver) requestPool(w http.ResponseWriter, r *http.Request) {
var req api.RequestPoolRequest
if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
sendError(w, "Could not decode JSON encode payload", http.StatusBadRequest)
return
}
log.WithField(logfields.Request, logfields.Repr(&req)).Debug("Request Pool request")
resp := driver.getPoolResponse(&req)
log.WithField(logfields.Response, logfields.Repr(resp)).Debug("Request Pool response")
objectResponse(w, resp)
}
func (driver *driver) releasePool(w http.ResponseWriter, r *http.Request) {
var release api.ReleasePoolRequest
if err := json.NewDecoder(r.Body).Decode(&release); err != nil {
sendError(w, "Could not decode JSON encode payload", http.StatusBadRequest)
return
}
log.WithField(logfields.Request, logfields.Repr(&release)).Debug("Release Pool request")
emptyResponse(w)
}
func (driver *driver) requestAddress(w http.ResponseWriter, r *http.Request) {
var request api.RequestAddressRequest
if err := json.NewDecoder(r.Body).Decode(&request); err != nil {
sendError(w, "Could not decode JSON encode payload", http.StatusBadRequest)
return
}
log.WithField(logfields.Request, logfields.Repr(&request)).Debug("Request Address request")
family := client.AddressFamilyIPv6 // Default
switch request.PoolID {
case PoolIPv4:
family = client.AddressFamilyIPv4
case PoolIPv6:
family = client.AddressFamilyIPv6
}
ipam, err := driver.client.IPAMAllocate(family, "docker-ipam", "", false)
if err != nil {
sendError(w, fmt.Sprintf("Could not allocate IP address: %s", err), http.StatusBadRequest)
return
}
// The host addressing may have changed due to a daemon restart, update it
driver.updateRoutes(ipam.HostAddressing)
addr := ipam.Address
if addr == nil {
sendError(w, "No IP addressing provided", http.StatusBadRequest)
return
}
resp := &api.RequestAddressResponse{}
if addr.IPV6 != "" {
if family != client.AddressFamilyIPv6 {
sendError(w, "Requested IPv4, received IPv6 address", http.StatusInternalServerError)
}
resp.Address = addr.IPV6 + "/128"
} else if addr.IPV4 != "" {
if family != client.AddressFamilyIPv4 {
sendError(w, "Requested IPv6, received IPv4 address", http.StatusInternalServerError)
}
resp.Address = addr.IPV4 + "/32"
}
log.WithField(logfields.Response, logfields.Repr(resp)).Debug("Request Address response")
objectResponse(w, resp)
}
func (driver *driver) releaseAddress(w http.ResponseWriter, r *http.Request) {
var release api.ReleaseAddressRequest
if err := json.NewDecoder(r.Body).Decode(&release); err != nil {
sendError(w, "Could not decode JSON encode payload", http.StatusBadRequest)
return
}
log.WithField(logfields.Request, logfields.Repr(&release)).Debug("Release Address request")
if err := driver.client.IPAMReleaseIP(release.Address, ""); err != nil {
sendError(w, fmt.Sprintf("Could not release IP address: %s", err), http.StatusBadRequest)
return
}
emptyResponse(w)
}