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qfix: Do not reset IPContext configuration on the reselect (networkse…
…rvicemesh#1582) * do not reset IPContext configuration on the reselect Signed-off-by: denis-tingaikin <denis.tingajkin@xored.com> * fix linter issues Signed-off-by: denis-tingaikin <denis.tingajkin@xored.com> --------- Signed-off-by: denis-tingaikin <denis.tingajkin@xored.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| // Copyright (c) 2024 Cisco and its affiliates. | ||
| // | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
| // | ||
| // 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 strictipam provides a networkservice.NetworkService Server chain element for building an IPAM server that prevents IP context configuration out of the settings scope | ||
| package strictipam | ||
|
|
||
| import ( | ||
| "context" | ||
| "net" | ||
|
|
||
| "github.com/golang/protobuf/ptypes/empty" | ||
| "github.com/networkservicemesh/api/pkg/api/networkservice" | ||
|
|
||
| "github.com/networkservicemesh/sdk/pkg/networkservice/core/next" | ||
| "github.com/networkservicemesh/sdk/pkg/tools/ippool" | ||
| ) | ||
|
|
||
| type strictIPAMServer struct { | ||
| ipPool *ippool.IPPool | ||
| } | ||
|
|
||
| // NewServer - returns a new ipam networkservice.NetworkServiceServer that validates the incoming IP context parameters and resets them based on the validation result. | ||
| func NewServer(newIPAMServer func(...*net.IPNet) networkservice.NetworkServiceServer, prefixes ...*net.IPNet) networkservice.NetworkServiceServer { | ||
| if newIPAMServer == nil { | ||
| panic("newIPAMServer should not be nil") | ||
| } | ||
| var ipPool = ippool.New(net.IPv6len) | ||
| for _, p := range prefixes { | ||
| ipPool.AddNet(p) | ||
| } | ||
| return next.NewNetworkServiceServer( | ||
| &strictIPAMServer{ipPool: ipPool}, | ||
| newIPAMServer(prefixes...), | ||
| ) | ||
| } | ||
|
|
||
| func (n *strictIPAMServer) areAddressesValid(addresses []string) bool { | ||
| for _, srcIP := range addresses { | ||
| if !n.ipPool.ContainsString(srcIP) { | ||
| return false | ||
| } | ||
| } | ||
| return true | ||
| } | ||
|
|
||
| func (n *strictIPAMServer) Request(ctx context.Context, request *networkservice.NetworkServiceRequest) (*networkservice.Connection, error) { | ||
| if !n.areAddressesValid(request.GetConnection().GetContext().GetIpContext().GetSrcIpAddrs()) || | ||
| !n.areAddressesValid(request.GetConnection().GetContext().GetIpContext().GetDstIpAddrs()) { | ||
| request.GetConnection().GetContext().IpContext = &networkservice.IPContext{} | ||
| } | ||
|
|
||
| return next.Server(ctx).Request(ctx, request) | ||
| } | ||
|
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| func (n *strictIPAMServer) Close(ctx context.Context, conn *networkservice.Connection) (*empty.Empty, error) { | ||
| return next.Server(ctx).Close(ctx, conn) | ||
| } |