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utils.go
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utils.go
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// Copyright 2017 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 api
import (
"fmt"
"strings"
)
// Exists returns true if the HTTP rule already exists in the list of rules
func (h *PortRuleHTTP) Exists(rules L7Rules) bool {
for _, existingRule := range rules.HTTP {
if h.Equal(existingRule) {
return true
}
}
return false
}
// Equal returns true if both HTTP rules are equal
func (h *PortRuleHTTP) Equal(o PortRuleHTTP) bool {
if h.Path != o.Path ||
h.Method != o.Method ||
h.Host != o.Host ||
len(h.Headers) != len(o.Headers) {
return false
}
for i, value := range h.Headers {
if o.Headers[i] != value {
return false
}
}
return true
}
// Exists returns true if the HTTP rule already exists in the list of rules
func (k *PortRuleKafka) Exists(rules L7Rules) bool {
for _, existingRule := range rules.Kafka {
if k.Equal(existingRule) {
return true
}
}
return false
}
// Exists returns true if the DNS rule already exists in the list of rules
func (d *PortRuleDNS) Exists(rules L7Rules) bool {
for _, existingRule := range rules.DNS {
if d.Equal(existingRule) {
return true
}
}
return false
}
// Equal returns true if both rules are equal
func (k *PortRuleKafka) Equal(o PortRuleKafka) bool {
return k.APIVersion == o.APIVersion && k.APIKey == o.APIKey &&
k.Topic == o.Topic && k.ClientID == o.ClientID && k.Role == o.Role
}
// Exists returns true if the L7 rule already exists in the list of rules
func (h *PortRuleL7) Exists(rules L7Rules) bool {
for _, existingRule := range rules.L7 {
if h.Equal(existingRule) {
return true
}
}
return false
}
// Equal returns true if both rules are equal
func (d *PortRuleDNS) Equal(o PortRuleDNS) bool {
return d != nil && d.MatchName == o.MatchName && d.MatchPattern == o.MatchPattern
}
// Equal returns true if both L7 rules are equal
func (h *PortRuleL7) Equal(o PortRuleL7) bool {
if len(*h) != len(o) {
return false
}
for k, v := range *h {
if v2, ok := o[k]; !ok || v2 != v {
return false
}
}
return true
}
// Validate returns an error if the layer 4 protocol is not valid
func (l4 L4Proto) Validate() error {
switch l4 {
case ProtoAny, ProtoTCP, ProtoUDP:
default:
return fmt.Errorf("invalid protocol %q, must be { tcp | udp | any }", l4)
}
return nil
}
// ParseL4Proto parses a string as layer 4 protocol
func ParseL4Proto(proto string) (L4Proto, error) {
if proto == "" {
return ProtoAny, nil
}
p := L4Proto(strings.ToUpper(proto))
return p, p.Validate()
}