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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| /* | ||
| Copyright 2017 The Kubernetes 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 endpoint | ||
|
|
||
| import ( | ||
| "net" | ||
| "strings" | ||
|
|
||
| log "github.com/sirupsen/logrus" | ||
| ) | ||
|
|
||
| // TargetFilterInterface defines the interface to select matching targets for a specific provider or runtime | ||
| type TargetFilterInterface interface { | ||
| Match(target string) bool | ||
| IsConfigured() bool | ||
| } | ||
|
|
||
| // TargetNetFilter holds a lists of valid target names | ||
| type TargetNetFilter struct { | ||
| // FilterNets define what targets to match | ||
| FilterNets []*net.IPNet | ||
| // excludeNets define what targets not to match | ||
| excludeNets []*net.IPNet | ||
| } | ||
|
|
||
| // prepareTargetFilters provides consistent trimming for filters/exclude params | ||
| func prepareTargetFilters(filters []string) []*net.IPNet { | ||
| fs := make([]*net.IPNet, 0) | ||
|
|
||
| for _, filter := range filters { | ||
| filter = strings.TrimSpace(filter) | ||
|
|
||
| _, filterNet, err := net.ParseCIDR(filter) | ||
| if err != nil { | ||
| log.Errorf("Invalid target net filter: %s", filter) | ||
|
|
||
| continue | ||
| } | ||
|
|
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| fs = append(fs, filterNet) | ||
| } | ||
| return fs | ||
| } | ||
|
|
||
| // NewTargetNetFilterWithExclusions returns a new TargetNetFilter, given a list of matches and exclusions | ||
| func NewTargetNetFilterWithExclusions(targetFilterNets []string, excludeNets []string) TargetNetFilter { | ||
| return TargetNetFilter{FilterNets: prepareTargetFilters(targetFilterNets), excludeNets: prepareTargetFilters(excludeNets)} | ||
| } | ||
|
|
||
| // NewTargetNetFilter returns a new TargetNetFilter given a comma separated list of targets | ||
| func NewTargetNetFilter(targetFilterNets []string) TargetNetFilter { | ||
| return TargetNetFilter{FilterNets: prepareTargetFilters(targetFilterNets)} | ||
| } | ||
|
|
||
| // Match checks whether a target can be found in the TargetNetFilter. | ||
| func (tf TargetNetFilter) Match(target string) bool { | ||
| return matchTargetNetFilter(tf.FilterNets, target, true) && !matchTargetNetFilter(tf.excludeNets, target, false) | ||
| } | ||
|
|
||
| // matchTargetNetFilter determines if any `filters` match `target`. | ||
| // If no `filters` are provided, behavior depends on `emptyval` | ||
| // (empty `tf.filters` matches everything, while empty `tf.exclude` excludes nothing) | ||
| func matchTargetNetFilter(filters []*net.IPNet, target string, emptyval bool) bool { | ||
| if len(filters) == 0 { | ||
| return emptyval | ||
| } | ||
|
|
||
| for _, filter := range filters { | ||
| ip := net.ParseIP(target) | ||
|
|
||
| if filter.Contains(ip) { | ||
| return true | ||
| } | ||
| } | ||
|
|
||
| return false | ||
| } | ||
|
|
||
| // IsConfigured returns true if TargetFilter is configured, false otherwise | ||
| func (tf TargetNetFilter) IsConfigured() bool { | ||
| if len(tf.FilterNets) == 1 { | ||
| return tf.FilterNets[0].Network() != "" | ||
| } | ||
| return len(tf.FilterNets) > 0 | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
| /* | ||
| Copyright 2017 The Kubernetes 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 endpoint | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
|
||
| type targetFilterTest struct { | ||
| targetFilter []string | ||
| exclusions []string | ||
| targets []string | ||
| expected bool | ||
| } | ||
|
|
||
| var targetFilterTests = []targetFilterTest{ | ||
| { | ||
| []string{"10.0.0.0/8"}, | ||
| []string{}, | ||
| []string{"10.1.2.3"}, | ||
| true, | ||
| }, | ||
| { | ||
| []string{" 10.0.0.0/8 "}, | ||
| []string{}, | ||
| []string{"10.1.2.3"}, | ||
| true, | ||
| }, | ||
| { | ||
| []string{"0"}, | ||
| []string{}, | ||
| []string{"10.1.2.3"}, | ||
| true, | ||
| }, | ||
| { | ||
| []string{"10.0.0.0/8"}, | ||
| []string{}, | ||
| []string{"1.1.1.1"}, | ||
| false, | ||
| }, | ||
| { | ||
| []string{}, | ||
| []string{"10.0.0.0/8"}, | ||
| []string{"1.1.1.1"}, | ||
| true, | ||
| }, | ||
| { | ||
| []string{}, | ||
| []string{"10.0.0.0/8"}, | ||
| []string{"10.1.2.3"}, | ||
| false, | ||
| }, | ||
| } | ||
|
|
||
| func TestTargetFilterMatch(t *testing.T) { | ||
| for i, tt := range targetFilterTests { | ||
| if len(tt.exclusions) > 0 { | ||
| t.Logf("NewTargetFilter() doesn't support exclusions - skipping test %+v", tt) | ||
| continue | ||
| } | ||
| targetFilter := NewTargetNetFilter(tt.targetFilter) | ||
| for _, target := range tt.targets { | ||
| assert.Equal(t, tt.expected, targetFilter.Match(target), "should not fail: %v in test-case #%v", target, i) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func TestTargetFilterWithExclusions(t *testing.T) { | ||
| for i, tt := range targetFilterTests { | ||
| if len(tt.exclusions) == 0 { | ||
| tt.exclusions = append(tt.exclusions, "") | ||
| } | ||
| targetFilter := NewTargetNetFilterWithExclusions(tt.targetFilter, tt.exclusions) | ||
| for _, target := range tt.targets { | ||
| assert.Equal(t, tt.expected, targetFilter.Match(target), "should not fail: %v in test-case #%v", target, i) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func TestTargetFilterMatchWithEmptyFilter(t *testing.T) { | ||
| for _, tt := range targetFilterTests { | ||
| targetFilter := TargetNetFilter{} | ||
| for i, target := range tt.targets { | ||
| assert.True(t, targetFilter.Match(target), "should not fail: %v in test-case #%v", target, i) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func TestMatchTargetFilterReturnsProperEmptyVal(t *testing.T) { | ||
| emptyFilters := []string{} | ||
| assert.Equal(t, true, matchFilter(emptyFilters, "sometarget.com", true)) | ||
| assert.Equal(t, false, matchFilter(emptyFilters, "sometarget.com", false)) | ||
| } | ||
|
|
||
| func TestTargetFilterIsConfigured(t *testing.T) { | ||
| for _, tt := range []struct { | ||
| filters []string | ||
| exclude []string | ||
| expected bool | ||
| }{ | ||
| { | ||
| []string{""}, | ||
| []string{""}, | ||
| false, | ||
| }, | ||
| { | ||
| []string{" "}, | ||
| []string{" "}, | ||
| false, | ||
| }, | ||
| { | ||
| []string{"", ""}, | ||
| []string{""}, | ||
| false, | ||
| }, | ||
| { | ||
| []string{"10/8"}, | ||
| []string{" "}, | ||
| false, | ||
| }, | ||
| { | ||
| []string{"10.0.0.0/8"}, | ||
| []string{" "}, | ||
| true, | ||
| }, | ||
| { | ||
| []string{" 10.0.0.0/8 "}, | ||
| []string{" ignored "}, | ||
| true, | ||
| }, | ||
| } { | ||
| t.Run("test IsConfigured", func(t *testing.T) { | ||
| tf := NewTargetNetFilterWithExclusions(tt.filters, tt.exclude) | ||
| assert.Equal(t, tt.expected, tf.IsConfigured()) | ||
| }) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| /* | ||
| Copyright 2017 The Kubernetes 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 source | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "sigs.k8s.io/external-dns/endpoint" | ||
| ) | ||
|
|
||
| // targetFilterSource is a Source that removes endpoints matching the target filter from its wrapped source. | ||
| type targetFilterSource struct { | ||
| source Source | ||
| targetFilter endpoint.TargetFilterInterface | ||
| } | ||
|
|
||
| // NewTargetFilterSource creates a new targetFilterSource wrapping the provided Source. | ||
| func NewTargetFilterSource(source Source, targetFilter endpoint.TargetFilterInterface) Source { | ||
| return &targetFilterSource{source: source, targetFilter: targetFilter} | ||
| } | ||
|
|
||
| // Endpoints collects endpoints from its wrapped source and returns | ||
| // them without targets matching the target filter. | ||
| func (ms *targetFilterSource) Endpoints(ctx context.Context) ([]*endpoint.Endpoint, error) { | ||
| result := []*endpoint.Endpoint{} | ||
|
|
||
| endpoints, err := ms.source.Endpoints(ctx) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| for _, ep := range endpoints { | ||
| filteredTargets := []string{} | ||
|
|
||
| for _, t := range ep.Targets { | ||
| if ms.targetFilter.Match(t) { | ||
| filteredTargets = append(filteredTargets, t) | ||
| } | ||
| } | ||
|
|
||
| ep.Targets = filteredTargets | ||
|
|
||
| result = append(result, ep) | ||
| } | ||
|
|
||
| return result, nil | ||
| } | ||
|
|
||
| func (ms *targetFilterSource) AddEventHandler(ctx context.Context, handler func()) { | ||
| ms.source.AddEventHandler(ctx, handler) | ||
| } |