blob: c08f88958dc1dd531af9f1695cb28782643ab978 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
package main
import "fmt"
type AddressCounter = int
type Ip4AddressAllocator struct {
networks map[int]AddressCounter
}
func (a *Ip4AddressAllocator) AddNetwork(networkNumber int) {
a.networks[networkNumber] = 1
}
func (a *Ip4AddressAllocator) NewIp4InterfaceAddress(inputNetworkNumber ...int) (string, error) {
var networkNumber int = 0
if len(inputNetworkNumber) > 0 {
networkNumber = inputNetworkNumber[0]
}
if _, ok := a.networks[networkNumber]; !ok {
a.AddNetwork(networkNumber)
}
numberOfAddresses := a.networks[networkNumber]
if numberOfAddresses == 254 {
return "", fmt.Errorf("no available IPv4 addresses")
}
address := fmt.Sprintf("10.10.%v.%v/24", networkNumber, numberOfAddresses)
a.networks[networkNumber] = numberOfAddresses + 1
return address, nil
}
func NewIp4AddressAllocator() *Ip4AddressAllocator {
var ip4AddrAllocator = new(Ip4AddressAllocator)
ip4AddrAllocator.networks = make(map[int]AddressCounter)
ip4AddrAllocator.AddNetwork(0)
return ip4AddrAllocator
}
|
