/
ipam.go
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/
ipam.go
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// Copyright 2016-2018 Authors of Cilium
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package connector
import (
"fmt"
"net"
"github.com/cilium/cilium/api/v1/models"
"github.com/cilium/cilium/pkg/datapath/linux/route"
"github.com/cilium/cilium/pkg/defaults"
)
// IPv6Gateway returns the IPv6 gateway address for endpoints.
func IPv6Gateway(addr *models.NodeAddressing) string {
// The host's IP is the gateway address
return addr.IPV6.IP
}
// IPv4Gateway returns the IPv4 gateway address for endpoints.
func IPv4Gateway(addr *models.NodeAddressing) string {
// The host's IP is the gateway address
return addr.IPV4.IP
}
// IPv6Routes returns IPv6 routes to be installed in endpoint's networking namespace.
func IPv6Routes(addr *models.NodeAddressing, linkMTU int) ([]route.Route, error) {
ip := net.ParseIP(addr.IPV6.IP)
if ip == nil {
return []route.Route{}, fmt.Errorf("Invalid IP address: %s", addr.IPV6.IP)
}
return []route.Route{
{
Prefix: net.IPNet{
IP: ip,
Mask: defaults.ContainerIPv6Mask,
},
},
{
Prefix: defaults.IPv6DefaultRoute,
Nexthop: &ip,
MTU: linkMTU,
},
}, nil
}
// IPv4Routes returns IPv4 routes to be installed in endpoint's networking namespace.
func IPv4Routes(addr *models.NodeAddressing, linkMTU int) ([]route.Route, error) {
ip := net.ParseIP(addr.IPV4.IP)
if ip == nil {
return []route.Route{}, fmt.Errorf("Invalid IP address: %s", addr.IPV4.IP)
}
return []route.Route{
{
Prefix: net.IPNet{
IP: ip,
Mask: defaults.ContainerIPv4Mask,
},
},
{
Prefix: defaults.IPv4DefaultRoute,
Nexthop: &ip,
MTU: linkMTU,
},
}, nil
}
// SufficientAddressing returns an error if the provided NodeAddressing does
// not provide sufficient information to derive all IPAM required settings.
func SufficientAddressing(addr *models.NodeAddressing) error {
if addr == nil {
return fmt.Errorf("Cilium daemon did not provide addressing information")
}
if addr.IPV6 != nil && addr.IPV6.IP != "" {
return nil
}
if addr.IPV4 != nil && addr.IPV4.IP != "" {
return nil
}
return fmt.Errorf("Either IPv4 or IPv6 addressing must be provided")
}