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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| // Copyright 2019-2023 The Liqo Authors | ||
| // | ||
| // 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 firewall | ||
|
|
||
| import ( | ||
| "github.com/google/nftables" | ||
|
|
||
| firewallapi "github.com/liqotech/liqo/apis/networking/v1alpha1/firewall" | ||
| ) | ||
|
|
||
| func addChain(nftconn *nftables.Conn, chain *firewallapi.Chain, table *nftables.Table) { | ||
| nftChain := &nftables.Chain{Table: table} | ||
| setChainName(nftChain, chain.Name) | ||
| setHooknum(nftChain, chain.Hook) | ||
| setPriority(nftChain, chain.Priority) | ||
| setType(nftChain, chain.Type) | ||
| setPolicy(nftChain, chain.Policy) | ||
| nftconn.AddChain(nftChain) | ||
| } | ||
|
|
||
| func setChainName(chain *nftables.Chain, name string) { | ||
| chain.Name = name | ||
| } | ||
|
|
||
| func setHooknum(chain *nftables.Chain, hooknum firewallapi.ChainHook) { | ||
| switch hooknum { | ||
| case firewallapi.ChainHookPrerouting: | ||
| chain.Hooknum = nftables.ChainHookPrerouting | ||
| case firewallapi.ChainHookInput: | ||
| chain.Hooknum = nftables.ChainHookInput | ||
| case firewallapi.ChainHookForward: | ||
| chain.Hooknum = nftables.ChainHookForward | ||
| case firewallapi.ChainHookOutput: | ||
| chain.Hooknum = nftables.ChainHookOutput | ||
| case firewallapi.ChainHookPostrouting: | ||
| chain.Hooknum = nftables.ChainHookPostrouting | ||
| case firewallapi.ChainHookIngress: | ||
| chain.Hooknum = nftables.ChainHookIngress | ||
| } | ||
| } | ||
|
|
||
| func setPriority(chain *nftables.Chain, priority firewallapi.ChainPriority) { | ||
| switch priority { | ||
| case firewallapi.ChainPriorityFirst: | ||
| chain.Priority = nftables.ChainPriorityFirst | ||
| case firewallapi.ChainPriorityConntrackDefrag: | ||
| chain.Priority = nftables.ChainPriorityConntrackDefrag | ||
| case firewallapi.ChainPriorityRaw: | ||
| chain.Priority = nftables.ChainPriorityRaw | ||
| case firewallapi.ChainPrioritySELinuxFirst: | ||
| chain.Priority = nftables.ChainPrioritySELinuxFirst | ||
| case firewallapi.ChainPriorityConntrack: | ||
| chain.Priority = nftables.ChainPriorityConntrack | ||
| case firewallapi.ChainPriorityMangle: | ||
| chain.Priority = nftables.ChainPriorityMangle | ||
| case firewallapi.ChainPriorityNATDest: | ||
| chain.Priority = nftables.ChainPriorityNATDest | ||
| case firewallapi.ChainPriorityFilter: | ||
| chain.Priority = nftables.ChainPriorityFilter | ||
| case firewallapi.ChainPrioritySecurity: | ||
| chain.Priority = nftables.ChainPrioritySecurity | ||
| case firewallapi.ChainPriorityNATSource: | ||
| chain.Priority = nftables.ChainPriorityNATSource | ||
| case firewallapi.ChainPrioritySELinuxLast: | ||
| chain.Priority = nftables.ChainPrioritySELinuxLast | ||
| case firewallapi.ChainPriorityConntrackHelper: | ||
| chain.Priority = nftables.ChainPriorityConntrackHelper | ||
| case firewallapi.ChainPriorityConntrackConfirm: | ||
| chain.Priority = nftables.ChainPriorityConntrackConfirm | ||
| case firewallapi.ChainPriorityLast: | ||
| chain.Priority = nftables.ChainPriorityLast | ||
| } | ||
| } | ||
|
|
||
| func setType(chain *nftables.Chain, chainType firewallapi.ChainType) { | ||
| switch chainType { | ||
| case firewallapi.ChainTypeFilter: | ||
| chain.Type = nftables.ChainTypeFilter | ||
| case firewallapi.ChainTypeRoute: | ||
| chain.Type = nftables.ChainTypeRoute | ||
| case firewallapi.ChainTypeNAT: | ||
| chain.Type = nftables.ChainTypeNAT | ||
| } | ||
| } | ||
|
|
||
| func setPolicy(chain *nftables.Chain, policy firewallapi.ChainPolicy) { | ||
| switch policy { | ||
| case firewallapi.ChainPolicyDrop: | ||
| p := nftables.ChainPolicyDrop | ||
| chain.Policy = &p | ||
| case firewallapi.ChainPolicyAccept: | ||
| p := nftables.ChainPolicyAccept | ||
| chain.Policy = &p | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| // Copyright 2019-2023 The Liqo Authors | ||
| // | ||
| // 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 firewall contains the controller that manages the firewall configuration. | ||
| package firewall |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| // Copyright 2019-2023 The Liqo Authors | ||
| // | ||
| // 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 firewall | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| ctrlutil "sigs.k8s.io/controller-runtime/pkg/controller/controllerutil" | ||
|
|
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| networkingv1alpha1 "github.com/liqotech/liqo/apis/networking/v1alpha1" | ||
| ) | ||
|
|
||
| const ( | ||
| // firewallConfigurationsControllerFinalizer is the finalizer added to virtual-node to allow the controller to clean up. | ||
| firewallConfigurationsControllerFinalizer = "firewallconfigurations-controller.liqo.io/finalizer" | ||
| ) | ||
|
|
||
| func (r *FirewallConfigurationReconciler) ensureFirewallConfigurationFinalizerPresence( | ||
| ctx context.Context, fwcfg *networkingv1alpha1.FirewallConfiguration) error { | ||
| ctrlutil.AddFinalizer(fwcfg, firewallConfigurationsControllerFinalizer) | ||
| return r.Client.Update(ctx, fwcfg) | ||
| } | ||
|
|
||
| func (r *FirewallConfigurationReconciler) ensureFirewallConfigurationFinalizerAbsence( | ||
| ctx context.Context, fwcfg *networkingv1alpha1.FirewallConfiguration) error { | ||
| ctrlutil.RemoveFinalizer(fwcfg, firewallConfigurationsControllerFinalizer) | ||
| return r.Client.Update(ctx, fwcfg) | ||
| } |
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