72 lines
2.2 KiB
Go
72 lines
2.2 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package server
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import (
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"net"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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)
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type DiscoveryAddresses interface {
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ServerAddressByClientCIDRs(net.IP) []metav1.ServerAddressByClientCIDR
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}
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// DefaultDiscoveryAddresses is a default implementation of DiscoveryAddresses that will work in most cases
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type DefaultDiscoveryAddresses struct {
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// DiscoveryCIDRRules is a list of CIDRs and Addresses to use if a client is in the range
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DiscoveryCIDRRules []DiscoveryCIDRRule
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// DefaultAddress is the address (hostname or IP and port) that should be used in
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// if no CIDR matches more specifically.
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DefaultAddress string
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}
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// DiscoveryCIDRRule is a rule for adding an alternate path to the master based on matching CIDR
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type DiscoveryCIDRRule struct {
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IPRange net.IPNet
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// Address is the address (hostname or IP and port) that should be used in
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// if this CIDR matches
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Address string
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}
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func (d DefaultDiscoveryAddresses) ServerAddressByClientCIDRs(clientIP net.IP) []metav1.ServerAddressByClientCIDR {
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addressCIDRMap := []metav1.ServerAddressByClientCIDR{
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{
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ClientCIDR: "0.0.0.0/0",
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ServerAddress: d.DefaultAddress,
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},
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}
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for _, rule := range d.DiscoveryCIDRRules {
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addressCIDRMap = append(addressCIDRMap, rule.ServerAddressByClientCIDRs(clientIP)...)
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}
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return addressCIDRMap
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}
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func (d DiscoveryCIDRRule) ServerAddressByClientCIDRs(clientIP net.IP) []metav1.ServerAddressByClientCIDR {
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addressCIDRMap := []metav1.ServerAddressByClientCIDR{}
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if d.IPRange.Contains(clientIP) {
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addressCIDRMap = append(addressCIDRMap, metav1.ServerAddressByClientCIDR{
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ClientCIDR: d.IPRange.String(),
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ServerAddress: d.Address,
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})
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}
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return addressCIDRMap
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}
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