mirror of https://github.com/k3s-io/k3s
136 lines
2.9 KiB
Go
136 lines
2.9 KiB
Go
/*
|
|
Copyright 2018 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 nodeinfo
|
|
|
|
import (
|
|
"k8s.io/api/core/v1"
|
|
)
|
|
|
|
// DefaultBindAllHostIP defines the default ip address used to bind to all host.
|
|
const DefaultBindAllHostIP = "0.0.0.0"
|
|
|
|
// ProtocolPort represents a protocol port pair, e.g. tcp:80.
|
|
type ProtocolPort struct {
|
|
Protocol string
|
|
Port int32
|
|
}
|
|
|
|
// NewProtocolPort creates a ProtocolPort instance.
|
|
func NewProtocolPort(protocol string, port int32) *ProtocolPort {
|
|
pp := &ProtocolPort{
|
|
Protocol: protocol,
|
|
Port: port,
|
|
}
|
|
|
|
if len(pp.Protocol) == 0 {
|
|
pp.Protocol = string(v1.ProtocolTCP)
|
|
}
|
|
|
|
return pp
|
|
}
|
|
|
|
// HostPortInfo stores mapping from ip to a set of ProtocolPort
|
|
type HostPortInfo map[string]map[ProtocolPort]struct{}
|
|
|
|
// Add adds (ip, protocol, port) to HostPortInfo
|
|
func (h HostPortInfo) Add(ip, protocol string, port int32) {
|
|
if port <= 0 {
|
|
return
|
|
}
|
|
|
|
h.sanitize(&ip, &protocol)
|
|
|
|
pp := NewProtocolPort(protocol, port)
|
|
if _, ok := h[ip]; !ok {
|
|
h[ip] = map[ProtocolPort]struct{}{
|
|
*pp: {},
|
|
}
|
|
return
|
|
}
|
|
|
|
h[ip][*pp] = struct{}{}
|
|
}
|
|
|
|
// Remove removes (ip, protocol, port) from HostPortInfo
|
|
func (h HostPortInfo) Remove(ip, protocol string, port int32) {
|
|
if port <= 0 {
|
|
return
|
|
}
|
|
|
|
h.sanitize(&ip, &protocol)
|
|
|
|
pp := NewProtocolPort(protocol, port)
|
|
if m, ok := h[ip]; ok {
|
|
delete(m, *pp)
|
|
if len(h[ip]) == 0 {
|
|
delete(h, ip)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Len returns the total number of (ip, protocol, port) tuple in HostPortInfo
|
|
func (h HostPortInfo) Len() int {
|
|
length := 0
|
|
for _, m := range h {
|
|
length += len(m)
|
|
}
|
|
return length
|
|
}
|
|
|
|
// CheckConflict checks if the input (ip, protocol, port) conflicts with the existing
|
|
// ones in HostPortInfo.
|
|
func (h HostPortInfo) CheckConflict(ip, protocol string, port int32) bool {
|
|
if port <= 0 {
|
|
return false
|
|
}
|
|
|
|
h.sanitize(&ip, &protocol)
|
|
|
|
pp := NewProtocolPort(protocol, port)
|
|
|
|
// If ip is 0.0.0.0 check all IP's (protocol, port) pair
|
|
if ip == DefaultBindAllHostIP {
|
|
for _, m := range h {
|
|
if _, ok := m[*pp]; ok {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// If ip isn't 0.0.0.0, only check IP and 0.0.0.0's (protocol, port) pair
|
|
for _, key := range []string{DefaultBindAllHostIP, ip} {
|
|
if m, ok := h[key]; ok {
|
|
if _, ok2 := m[*pp]; ok2 {
|
|
return true
|
|
}
|
|
}
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
// sanitize the parameters
|
|
func (h HostPortInfo) sanitize(ip, protocol *string) {
|
|
if len(*ip) == 0 {
|
|
*ip = DefaultBindAllHostIP
|
|
}
|
|
if len(*protocol) == 0 {
|
|
*protocol = string(v1.ProtocolTCP)
|
|
}
|
|
}
|