| 298 | } |
| 299 | |
| 300 | func TestIsCGNAT(t *testing.T) { |
| 301 | tests := []struct { |
| 302 | ip string |
| 303 | want bool |
| 304 | }{ |
| 305 | // Inside 100.64.0.0/10 |
| 306 | {"100.64.0.0", true}, |
| 307 | {"100.64.0.1", true}, |
| 308 | {"100.100.100.100", true}, |
| 309 | {"100.127.255.255", true}, |
| 310 | |
| 311 | // Outside 100.64.0.0/10 |
| 312 | {"100.63.255.255", false}, |
| 313 | {"100.128.0.0", false}, |
| 314 | {"10.0.0.1", false}, |
| 315 | {"192.168.1.1", false}, |
| 316 | |
| 317 | // IPv6 → always false |
| 318 | {"2001:db8::1", false}, |
| 319 | } |
| 320 | |
| 321 | for _, tt := range tests { |
| 322 | t.Run(tt.ip, func(t *testing.T) { |
| 323 | ip := net.ParseIP(tt.ip) |
| 324 | require.NotNil(t, ip) |
| 325 | assert.Equal(t, tt.want, isCGNAT(ip)) |
| 326 | }) |
| 327 | } |
| 328 | } |