istio.io/istio@v0.0.0-20240520182934-d79c90f27776/pilot/test/xdstest/test.go (about)

     1  // Copyright Istio Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package xdstest
    16  
    17  import (
    18  	listener "github.com/envoyproxy/go-control-plane/envoy/config/listener/v3"
    19  )
    20  
    21  // EvaluateListenerFilterPredicates runs through the ListenerFilterChainMatchPredicate logic
    22  // This is exposed for testing only, and should not be used in XDS generation code
    23  func EvaluateListenerFilterPredicates(predicate *listener.ListenerFilterChainMatchPredicate, port int) bool {
    24  	if predicate == nil {
    25  		return true
    26  	}
    27  	switch r := predicate.Rule.(type) {
    28  	case *listener.ListenerFilterChainMatchPredicate_NotMatch:
    29  		return !EvaluateListenerFilterPredicates(r.NotMatch, port)
    30  	case *listener.ListenerFilterChainMatchPredicate_OrMatch:
    31  		matches := false
    32  		for _, r := range r.OrMatch.Rules {
    33  			matches = matches || EvaluateListenerFilterPredicates(r, port)
    34  		}
    35  		return matches
    36  	case *listener.ListenerFilterChainMatchPredicate_DestinationPortRange:
    37  		return int32(port) >= r.DestinationPortRange.GetStart() && int32(port) < r.DestinationPortRange.GetEnd()
    38  	default:
    39  		panic("unsupported predicate")
    40  	}
    41  }