76 lines
2.6 KiB
Go
76 lines
2.6 KiB
Go
package util
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import (
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"fmt"
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"net"
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"reflect"
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"testing"
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)
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func parseCIDR(n string) *net.IPNet {
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_, parsedNet, _ := net.ParseCIDR(n)
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return parsedNet
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}
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func TestNextSubnet(t *testing.T) {
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type args struct {
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subnet *net.IPNet
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}
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tests := []struct {
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name string
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args args
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want *net.IPNet
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wantErr bool
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}{
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{"class a", args{subnet: parseCIDR("10.0.0.0/8")}, parseCIDR("11.0.0.0/8"), false},
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{"class b", args{subnet: parseCIDR("192.168.0.0/16")}, parseCIDR("192.169.0.0/16"), false},
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{"class c", args{subnet: parseCIDR("192.168.1.0/24")}, parseCIDR("192.168.2.0/24"), false},
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{"custom cidr /23", args{subnet: parseCIDR("192.168.0.0/23")}, parseCIDR("192.168.2.0/23"), false},
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{"custom cidr /23 2", args{subnet: parseCIDR("192.168.2.0/23")}, parseCIDR("192.168.4.0/23"), false},
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{"custom cidr /23 with overflow", args{subnet: parseCIDR("192.168.254.0/23")}, parseCIDR("192.169.0.0/23"), false},
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{"/9", args{subnet: parseCIDR("10.0.0.0/9")}, parseCIDR("10.128.0.0/9"), false},
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{"/11", args{subnet: parseCIDR("10.0.0.0/11")}, parseCIDR("10.32.0.0/11"), false},
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{"/11", args{subnet: parseCIDR("0.0.0.0/11")}, parseCIDR("0.32.0.0/11"), false},
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{"only one subnet", args{subnet: parseCIDR("0.0.0.0/0")}, nil, true},
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{"no more subnets", args{subnet: parseCIDR("255.255.255.0/24")}, nil, true},
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{"no more subnets 2", args{subnet: parseCIDR("255.240.0.0/12")}, nil, true},
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{"ipv6", args{subnet: parseCIDR("fdfd:d319:b145:fd4b::/64")}, parseCIDR("fdfd:d319:b145:fd4c::/64"), false},
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{"ipv6 with overflow", args{subnet: parseCIDR("fdfd:d319:b145:ffff::/64")}, parseCIDR("fdfd:d319:b146:0::/64"), false},
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}
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for _, tt := range tests {
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test := tt
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t.Run(test.name, func(t *testing.T) {
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got, err := NextSubnet(test.args.subnet)
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if (err != nil) != test.wantErr {
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t.Errorf("NextSubnet() error = %v, wantErr %v", err, test.wantErr)
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return
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}
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if !reflect.DeepEqual(got, test.want) {
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t.Errorf("NextSubnet() got = %v, want %v", got, test.want)
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}
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})
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}
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}
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func TestGetRandomIPv6Subnet(t *testing.T) {
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for i := range 1000 {
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t.Run(fmt.Sprintf("GetRandomIPv6Subnet %d", i), func(t *testing.T) {
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sub, err := getRandomIPv6Subnet()
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if err != nil {
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t.Errorf("GetRandomIPv6Subnet() error should be nil: %v", err)
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return
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}
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if sub.IP.To4() != nil {
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t.Errorf("ip %s is not an ipv6 address", sub.IP)
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}
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if sub.IP[0] != 0xfd {
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t.Errorf("ipv6 %s does not start with fd", sub.IP)
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}
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ones, bytes := sub.Mask.Size()
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if ones != 64 || bytes != 128 {
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t.Errorf("wrong network mask %v, it should be /64", sub.Mask)
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}
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})
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}
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}
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