├── .gitignore ├── LICENSE ├── README.md ├── benchmark_test.go ├── cidr_ipv4_test.data ├── cidr_ipv6_test.data ├── iprange.go ├── iprange_test.go ├── search.go ├── search_test.go └── util.go /.gitignore: -------------------------------------------------------------------------------- 1 | # Compiled Object files, Static and Dynamic libs (Shared Objects) 2 | *.o 3 | *.a 4 | *.so 5 | 6 | # Folders 7 | _obj 8 | _test 9 | 10 | # Architecture specific extensions/prefixes 11 | *.[568vq] 12 | [568vq].out 13 | 14 | *.cgo1.go 15 | *.cgo2.c 16 | _cgo_defun.c 17 | _cgo_gotypes.go 18 | _cgo_export.* 19 | 20 | _testmain.go 21 | 22 | *.exe 23 | *.test 24 | *.prof 25 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright {yyyy} {name of copyright owner} 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | package `iprange` provides some methods to check whether a [net.IP](https://golang.org/pkg/net/#IP) is contained in some IP ranges. 2 | 3 | The ip range is defined via [CIRD](https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing), for example, `216.249.16.0/20` and `2a01:5a80::/32`. 4 | There are different methods for IPv4 or IPv6 processing. 5 | 6 | If you want to use this library, you first get it: 7 | ```sh 8 | go get github.com/smallnest/iprange 9 | ``` 10 | 11 | Then you can parse a IPv4 or IPv6 range list (assume the list is sorted, otherwise you must sort it like search_test.go): 12 | ```go 13 | ipRanges := ParseIPV4RangeFromFile("cidr_ipv4_test.data") 14 | ``` 15 | 16 | Now you can check a whether net.IP is contained in this list: 17 | ```go 18 | existed := IPv4Contains(ipRanges, ip) 19 | ``` 20 | 21 | It uses [binary search algorithm](https://en.wikipedia.org/wiki/Binary_search_algorithm) to check so the check is very effective method. 22 | 23 | Binary search runs in at worst logarithmic time, making O(log n) comparisons, where n is the number of elements in the list and log is the logarithm. Binary search takes only constant (O(1)) space, meaning that the space taken by the algorithm is the same for any number of elements in the array. 24 | 25 | - Worst-case performance: `O(log n)` 26 | - Best-case performance: `O(1)` 27 | - Average performance: `O(log n)` 28 | - Worst-case space complexity: `O(1)` 29 | 30 | `bit trie` algorithm should be more effective but I have not implemented it. 31 | 32 | I found other implementations ~~so you prefer those implementation with radix tree~~: 33 | - [go-net-radix](https://github.com/thekvs/go-net-radix) 34 | - [nradix](https://github.com/asergeyev/nradix) 35 | - [Longest Prefix Match algorithm in Go part 1](https://fredhsu.wordpress.com/2014/06/09/longest-prefix-match-algorithm-in-go-part-1/) 36 | - [iptree](https://github.com/zmap/go-iptree) 37 | 38 | The below is benchmark of [iprange](https://github.com/smallnest/iprange), [go-net-radix](https://github.com/thekvs/go-net-radix), [nradix](https://github.com/asergeyev/nradix): 39 | 40 | [nradix](https://github.com/asergeyev/nradix) and [iprange](https://github.com/smallnest/iprange) are much better than [go-net-radix](https://github.com/thekvs/go-net-radix). 41 | 42 | 43 | ``` 44 | BenchmarkIPv4Contains-8 500000 3387 ns/op 0 B/op 0 allocs/op 45 | BenchmarkIPv4Contains_Radix-8 5000 223566 ns/op 696 B/op 70 allocs/op 46 | BenchmarkIPv4Contains_NRadix-8 500000 3439 ns/op 192 B/op 34 allocs/op 47 | 48 | BenchmarkIPv6Contains-8 300000 5835 ns/op 720 B/op 18 allocs/op 49 | BenchmarkIPv6Contains_Radix-8 5000 224394 ns/op 728 B/op 45 allocs/op 50 | BenchmarkIPv6Contains_NRadix-8 300000 4315 ns/op 800 B/op 33 allocs/op 51 | ``` 52 | -------------------------------------------------------------------------------- /benchmark_test.go: -------------------------------------------------------------------------------- 1 | package iprange 2 | 3 | import ( 4 | "net" 5 | "testing" 6 | 7 | "github.com/asergeyev/nradix" 8 | "github.com/bradfitz/slice" 9 | netradix "github.com/thekvs/go-net-radix" 10 | ) 11 | 12 | func BenchmarkIPv4Contains(b *testing.B) { 13 | b.StopTimer() 14 | ipRanges := ParseIPV4RangeFromFile("cidr_ipv4_test.data") 15 | 16 | //sort. Go 1.8 supports sort.Slice(things, func(i, j int) bool) but it will be released next year 17 | slice.Sort(ipRanges, func(i, j int) bool { 18 | return ipRanges[i].Start < ipRanges[j].Start 19 | }) 20 | 21 | type args struct { 22 | ipRanges []*IPV4Range 23 | ip net.IP 24 | } 25 | tests := []struct { 26 | name string 27 | args args 28 | want bool 29 | }{ 30 | { 31 | name: "MidStart", 32 | args: args{ipRanges: ipRanges, ip: net.ParseIP("103.67.32.0")}, 33 | want: true, 34 | }, 35 | { 36 | name: "MidMid", 37 | args: args{ipRanges: ipRanges, ip: net.ParseIP("103.67.32.1")}, 38 | want: true, 39 | }, 40 | { 41 | name: "MidMissed", 42 | args: args{ipRanges: ipRanges, ip: net.ParseIP("103.67.100.77")}, 43 | want: false, 44 | }, 45 | { 46 | name: "Lowbound", 47 | args: args{ipRanges: ipRanges, ip: net.ParseIP("3.0.0.0")}, 48 | want: true, 49 | }, 50 | { 51 | name: "Upperbound", 52 | args: args{ipRanges: ipRanges, ip: net.ParseIP("216.255.255.255")}, 53 | want: true, 54 | }, 55 | { 56 | name: "Lowbound-1", 57 | args: args{ipRanges: ipRanges, ip: net.ParseIP("2.255.255.255")}, 58 | want: false, 59 | }, 60 | { 61 | name: "Upperbound+1", 62 | args: args{ipRanges: ipRanges, ip: net.ParseIP("217.0.0.0")}, 63 | want: false, 64 | }, 65 | { 66 | name: "First", 67 | args: args{ipRanges: ipRanges, ip: net.ParseIP("0.0.0.0")}, 68 | want: false, 69 | }, 70 | { 71 | name: "Last", 72 | args: args{ipRanges: ipRanges, ip: net.ParseIP("255.255.255.255")}, 73 | want: false, 74 | }, 75 | } 76 | 77 | b.StartTimer() 78 | 79 | for n := 0; n < b.N; n++ { 80 | for _, tt := range tests { 81 | if got := IPv4Contains(tt.args.ipRanges, tt.args.ip); got != tt.want { 82 | b.Errorf("%q. Contains() = %v, want %v", tt.name, got, tt.want) 83 | } 84 | } 85 | } 86 | } 87 | 88 | func BenchmarkIPv4Contains_Radix(b *testing.B) { 89 | b.StopTimer() 90 | ipRanges := ParseIPV4RangeFromFile("cidr_ipv4_test.data") 91 | rtree, err := netradix.NewNetRadixTree() 92 | if err != nil { 93 | b.Error(err) 94 | } 95 | defer rtree.Close() 96 | for _, ir := range ipRanges { 97 | rtree.Add(ir.IPNet.String(), "") 98 | } 99 | 100 | type args struct { 101 | rtree *netradix.NetRadixTree 102 | ip net.IP 103 | } 104 | tests := []struct { 105 | name string 106 | args args 107 | want bool 108 | }{ 109 | { 110 | name: "MidStart", 111 | args: args{rtree: rtree, ip: net.ParseIP("103.67.32.0")}, 112 | want: true, 113 | }, 114 | { 115 | name: "MidMid", 116 | args: args{rtree: rtree, ip: net.ParseIP("103.67.32.1")}, 117 | want: true, 118 | }, 119 | { 120 | name: "MidMissed", 121 | args: args{rtree: rtree, ip: net.ParseIP("103.67.100.77")}, 122 | want: false, 123 | }, 124 | { 125 | name: "Lowbound", 126 | args: args{rtree: rtree, ip: net.ParseIP("3.0.0.0")}, 127 | want: true, 128 | }, 129 | { 130 | name: "Upperbound", 131 | args: args{rtree: rtree, ip: net.ParseIP("216.255.255.255")}, 132 | want: true, 133 | }, 134 | { 135 | name: "Lowbound-1", 136 | args: args{rtree: rtree, ip: net.ParseIP("2.255.255.255")}, 137 | want: false, 138 | }, 139 | { 140 | name: "Upperbound+1", 141 | args: args{rtree: rtree, ip: net.ParseIP("217.0.0.0")}, 142 | want: false, 143 | }, 144 | { 145 | name: "First", 146 | args: args{rtree: rtree, ip: net.ParseIP("0.0.0.0")}, 147 | want: false, 148 | }, 149 | { 150 | name: "Last", 151 | args: args{rtree: rtree, ip: net.ParseIP("255.255.255.255")}, 152 | want: false, 153 | }, 154 | } 155 | 156 | b.StartTimer() 157 | 158 | for n := 0; n < b.N; n++ { 159 | for _, tt := range tests { 160 | if got, _, err := tt.args.rtree.SearchBest(tt.args.ip.String()); got != tt.want || err != nil { 161 | b.Errorf("%q. Contains() = %v, want %v", tt.name, got, tt.want) 162 | } 163 | } 164 | } 165 | } 166 | 167 | func BenchmarkIPv4Contains_NRadix(b *testing.B) { 168 | b.StopTimer() 169 | ipRanges := ParseIPV4RangeFromFile("cidr_ipv4_test.data") 170 | rtree := nradix.NewTree(0) 171 | 172 | for _, ir := range ipRanges { 173 | rtree.AddCIDR(ir.IPNet.String(), nil) 174 | } 175 | 176 | type args struct { 177 | rtree *nradix.Tree 178 | ip net.IP 179 | } 180 | tests := []struct { 181 | name string 182 | args args 183 | want bool 184 | }{ 185 | { 186 | name: "MidStart", 187 | args: args{rtree: rtree, ip: net.ParseIP("103.67.32.0")}, 188 | want: true, 189 | }, 190 | { 191 | name: "MidMid", 192 | args: args{rtree: rtree, ip: net.ParseIP("103.67.32.1")}, 193 | want: true, 194 | }, 195 | { 196 | name: "MidMissed", 197 | args: args{rtree: rtree, ip: net.ParseIP("103.67.100.77")}, 198 | want: false, 199 | }, 200 | { 201 | name: "Lowbound", 202 | args: args{rtree: rtree, ip: net.ParseIP("3.0.0.0")}, 203 | want: true, 204 | }, 205 | { 206 | name: "Upperbound", 207 | args: args{rtree: rtree, ip: net.ParseIP("216.255.255.255")}, 208 | want: true, 209 | }, 210 | { 211 | name: "Lowbound-1", 212 | args: args{rtree: rtree, ip: net.ParseIP("2.255.255.255")}, 213 | want: false, 214 | }, 215 | { 216 | name: "Upperbound+1", 217 | args: args{rtree: rtree, ip: net.ParseIP("217.0.0.0")}, 218 | want: false, 219 | }, 220 | { 221 | name: "First", 222 | args: args{rtree: rtree, ip: net.ParseIP("0.0.0.0")}, 223 | want: false, 224 | }, 225 | { 226 | name: "Last", 227 | args: args{rtree: rtree, ip: net.ParseIP("255.255.255.255")}, 228 | want: false, 229 | }, 230 | } 231 | 232 | b.StartTimer() 233 | 234 | for n := 0; n < b.N; n++ { 235 | for _, tt := range tests { 236 | if _, err := tt.args.rtree.FindCIDR(tt.args.ip.String()); err != nil { 237 | b.Errorf("%q. Contains() = nil, want %v beause of %v", tt.name, tt.want, err) 238 | } 239 | } 240 | } 241 | } 242 | 243 | func BenchmarkIPv6Contains(b *testing.B) { 244 | b.StopTimer() 245 | ipRanges := ParseIPV6RangeFromFile("cidr_ipv6_test.data") 246 | 247 | //sort. Go 1.8 supports sort.Slice(things, func(i, j int) bool) but it will be released next year 248 | slice.Sort(ipRanges, func(i, j int) bool { 249 | return ipRanges[i].Start.Cmp(ipRanges[j].Start) < 0 250 | }) 251 | 252 | type args struct { 253 | ipRanges []*IPV6Range 254 | ip net.IP 255 | } 256 | tests := []struct { 257 | name string 258 | args args 259 | want bool 260 | }{ 261 | { 262 | name: "MidStart", 263 | args: args{ipRanges: ipRanges, ip: net.ParseIP("2607:d200::")}, 264 | want: true, 265 | }, 266 | { 267 | name: "MidMid", 268 | args: args{ipRanges: ipRanges, ip: net.ParseIP("2607:d200::1")}, 269 | want: true, 270 | }, 271 | { 272 | name: "MidMissed", 273 | args: args{ipRanges: ipRanges, ip: net.ParseIP("2607:d201::ffff")}, 274 | want: false, 275 | }, 276 | { 277 | name: "Lowbound", 278 | args: args{ipRanges: ipRanges, ip: net.ParseIP("2001:1800::")}, 279 | want: true, 280 | }, 281 | { 282 | name: "Upperbound", 283 | args: args{ipRanges: ipRanges, ip: net.ParseIP("2a03:cd00:ffff:ffff:ffff:ffff:ffff:ffff")}, 284 | want: true, 285 | }, 286 | { 287 | name: "Lowbound-1", 288 | args: args{ipRanges: ipRanges, ip: net.ParseIP("2001:17ff:ffff:ffff:ffff:ffff:ffff:ffff")}, 289 | want: false, 290 | }, 291 | { 292 | name: "Upperbound+1", 293 | args: args{ipRanges: ipRanges, ip: net.ParseIP("2a03:cd01::")}, 294 | want: false, 295 | }, 296 | { 297 | name: "First", 298 | args: args{ipRanges: ipRanges, ip: net.ParseIP("::")}, 299 | want: false, 300 | }, 301 | { 302 | name: "Last", 303 | args: args{ipRanges: ipRanges, ip: net.ParseIP("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")}, 304 | want: false, 305 | }, 306 | } 307 | 308 | b.StartTimer() 309 | for n := 0; n < b.N; n++ { 310 | for _, tt := range tests { 311 | if got := IPv6Contains(tt.args.ipRanges, tt.args.ip); got != tt.want { 312 | b.Errorf("%q. Contains() = %v, want %v", tt.name, got, tt.want) 313 | } 314 | } 315 | } 316 | } 317 | 318 | func BenchmarkIPv6Contains_Radix(b *testing.B) { 319 | b.StopTimer() 320 | ipRanges := ParseIPV6RangeFromFile("cidr_ipv6_test.data") 321 | 322 | rtree, err := netradix.NewNetRadixTree() 323 | if err != nil { 324 | b.Error(err) 325 | } 326 | defer rtree.Close() 327 | for _, ir := range ipRanges { 328 | rtree.Add(ir.IPNet.String(), "") 329 | } 330 | 331 | type args struct { 332 | rtree *netradix.NetRadixTree 333 | ip net.IP 334 | } 335 | 336 | tests := []struct { 337 | name string 338 | args args 339 | want bool 340 | }{ 341 | { 342 | name: "MidStart", 343 | args: args{rtree: rtree, ip: net.ParseIP("2607:d200::")}, 344 | want: true, 345 | }, 346 | { 347 | name: "MidMid", 348 | args: args{rtree: rtree, ip: net.ParseIP("2607:d200::1")}, 349 | want: true, 350 | }, 351 | { 352 | name: "MidMissed", 353 | args: args{rtree: rtree, ip: net.ParseIP("2607:d201::ffff")}, 354 | want: false, 355 | }, 356 | { 357 | name: "Lowbound", 358 | args: args{rtree: rtree, ip: net.ParseIP("2001:1800::")}, 359 | want: true, 360 | }, 361 | { 362 | name: "Upperbound", 363 | args: args{rtree: rtree, ip: net.ParseIP("2a03:cd00:ffff:ffff:ffff:ffff:ffff:ffff")}, 364 | want: true, 365 | }, 366 | { 367 | name: "Lowbound-1", 368 | args: args{rtree: rtree, ip: net.ParseIP("2001:17ff:ffff:ffff:ffff:ffff:ffff:ffff")}, 369 | want: false, 370 | }, 371 | { 372 | name: "Upperbound+1", 373 | args: args{rtree: rtree, ip: net.ParseIP("2a03:cd01::")}, 374 | want: false, 375 | }, 376 | { 377 | name: "First", 378 | args: args{rtree: rtree, ip: net.ParseIP("::")}, 379 | want: false, 380 | }, 381 | { 382 | name: "Last", 383 | args: args{rtree: rtree, ip: net.ParseIP("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")}, 384 | want: false, 385 | }, 386 | } 387 | 388 | b.StartTimer() 389 | for n := 0; n < b.N; n++ { 390 | for _, tt := range tests { 391 | if got, _, err := tt.args.rtree.SearchBest(tt.args.ip.String()); got != tt.want || err != nil { 392 | b.Errorf("%q. Contains() = %v, want %v", tt.name, got, tt.want) 393 | } 394 | } 395 | } 396 | } 397 | 398 | func BenchmarkIPv6Contains_NRadix(b *testing.B) { 399 | b.StopTimer() 400 | ipRanges := ParseIPV6RangeFromFile("cidr_ipv6_test.data") 401 | 402 | rtree := nradix.NewTree(0) 403 | 404 | for _, ir := range ipRanges { 405 | rtree.AddCIDR(ir.IPNet.String(), nil) 406 | } 407 | 408 | type args struct { 409 | rtree *nradix.Tree 410 | ip net.IP 411 | } 412 | 413 | tests := []struct { 414 | name string 415 | args args 416 | want bool 417 | }{ 418 | { 419 | name: "MidStart", 420 | args: args{rtree: rtree, ip: net.ParseIP("2607:d200::")}, 421 | want: true, 422 | }, 423 | { 424 | name: "MidMid", 425 | args: args{rtree: rtree, ip: net.ParseIP("2607:d200::1")}, 426 | want: true, 427 | }, 428 | { 429 | name: "MidMissed", 430 | args: args{rtree: rtree, ip: net.ParseIP("2607:d201::ffff")}, 431 | want: false, 432 | }, 433 | { 434 | name: "Lowbound", 435 | args: args{rtree: rtree, ip: net.ParseIP("2001:1800::")}, 436 | want: true, 437 | }, 438 | { 439 | name: "Upperbound", 440 | args: args{rtree: rtree, ip: net.ParseIP("2a03:cd00:ffff:ffff:ffff:ffff:ffff:ffff")}, 441 | want: true, 442 | }, 443 | { 444 | name: "Lowbound-1", 445 | args: args{rtree: rtree, ip: net.ParseIP("2001:17ff:ffff:ffff:ffff:ffff:ffff:ffff")}, 446 | want: false, 447 | }, 448 | { 449 | name: "Upperbound+1", 450 | args: args{rtree: rtree, ip: net.ParseIP("2a03:cd01::")}, 451 | want: false, 452 | }, 453 | { 454 | name: "First", 455 | args: args{rtree: rtree, ip: net.ParseIP("::")}, 456 | want: false, 457 | }, 458 | { 459 | name: "Last", 460 | args: args{rtree: rtree, ip: net.ParseIP("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")}, 461 | want: false, 462 | }, 463 | } 464 | 465 | b.StartTimer() 466 | for n := 0; n < b.N; n++ { 467 | for _, tt := range tests { 468 | if _, err := tt.args.rtree.FindCIDR(tt.args.ip.String()); err != nil { 469 | b.Errorf("%q. Contains() = nil, want %v beause of %v", tt.name, tt.want, err) 470 | } 471 | } 472 | } 473 | } 474 | -------------------------------------------------------------------------------- /cidr_ipv6_test.data: -------------------------------------------------------------------------------- 1 | 2001:1800::/32 2 | 2001:1810::/32 3 | 2001:1818::/32 4 | 2001:1820::/32 5 | 2001:1828::/32 6 | 2001:1830::/32 7 | 2001:1838::/32 8 | 2001:1840::/32 9 | 2001:1848::/32 10 | 2001:1850::/32 11 | 2001:1858::/32 12 | 2001:1860::/32 13 | 2001:1868::/32 14 | 2001:1878::/32 15 | 2001:1888::/32 16 | 2001:1890::/29 17 | 2001:1898::/32 18 | 2001:18a0::/32 19 | 2001:18a8::/32 20 | 2001:18b0::/32 21 | 2001:18b8::/32 22 | 2001:18c8::/32 23 | 2001:18d8::/32 24 | 2001:18e0::/32 25 | 2001:18e8::/32 26 | 2001:1900::/32 27 | 2001:1908::/32 28 | 2001:1910::/32 29 | 2001:1930::/32 30 | 2001:1938::/32 31 | 2001:1940::/32 32 | 2001:1948::/32 33 | 2001:1950::/32 34 | 2001:1958::/32 35 | 2001:1960::/32 36 | 2001:1968::/32 37 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2718 | 2620:a2:8000::/48 2719 | 2620:a2::/48 2720 | 2620:a3:8000::/48 2721 | 2620:a3::/48 2722 | 2620:a4:8080::/48 2723 | 2620:a4::/44 2724 | 2620:a5:8000::/48 2725 | 2620:a5::/48 2726 | 2620:a6:8000::/48 2727 | 2620:a6::/48 2728 | 2620:a7:8000::/48 2729 | 2620:a7::/48 2730 | 2620:a8:8000::/48 2731 | 2620:a8::/48 2732 | 2620:a9:8000::/48 2733 | 2620:a9::/48 2734 | 2620:a:4000::/48 2735 | 2620:a:8000::/48 2736 | 2620:a:c000::/48 2737 | 2620:aa:8000::/48 2738 | 2620:aa::/48 2739 | 2620:ab:8000::/48 2740 | 2620:ab::/48 2741 | 2620:ac:8000::/48 2742 | 2620:ac::/48 2743 | 2620:ad:8000::/48 2744 | 2620:ad::/48 2745 | 2620:ae:8000::/48 2746 | 2620:af:8000::/48 2747 | 2620:af::/48 2748 | 2620:b0:8000::/48 2749 | 2620:b1:8000::/48 2750 | 2620:b1::/48 2751 | 2620:b2:8000::/48 2752 | 2620:b2::/48 2753 | 2620:b3:8000::/48 2754 | 2620:b3::/48 2755 | 2620:b4::/48 2756 | 2620:b5:8000::/48 2757 | 2620:b5::/48 2758 | 2620:b6:8000::/48 2759 | 2620:b6::/48 2760 | 2620:b7::/48 2761 | 2620:b8:8000::/48 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2620:cc:8000::/48 2807 | 2620:cc::/48 2808 | 2620:cd:8000::/48 2809 | 2620:cd::/48 2810 | 2620:ce:8000::/48 2811 | 2620:ce::/48 2812 | 2620:cf:8000::/48 2813 | 2620:cf::/48 2814 | 2620:d0:8000::/48 2815 | 2620:d0::/48 2816 | 2620:d1:8000::/48 2817 | 2620:d1::/48 2818 | 2620:d2:8000::/48 2819 | 2620:d2::/48 2820 | 2620:d3:8000::/48 2821 | 2620:d3::/48 2822 | 2620:d4:8000::/48 2823 | 2620:d4::/48 2824 | 2620:d5:8000::/48 2825 | 2620:d5::/48 2826 | 2620:d6::/48 2827 | 2620:d7:8000::/48 2828 | 2620:d7::/48 2829 | 2620:d8:8000::/48 2830 | 2620:d8::/48 2831 | 2620:d9:8000::/48 2832 | 2620:d9::/48 2833 | 2620:d:4000::/48 2834 | 2620:d:8000::/48 2835 | 2620:d::/48 2836 | 2620:d:c000::/48 2837 | 2620:da:8000::/48 2838 | 2620:da::/48 2839 | 2620:db:8000::/48 2840 | 2620:db::/48 2841 | 2620:dc:8::/48 2842 | 2620:dc::/48 2843 | 2620:dd:8000::/48 2844 | 2620:de:8000::/48 2845 | 2620:de::/48 2846 | 2620:df:8000::/48 2847 | 2620:df::/48 2848 | 2620:e0:8000::/48 2849 | 2620:e0::/48 2850 | 2620:e1:8000::/48 2851 | 2620:e1::/48 2852 | 2620:e2:8000::/48 2853 | 2620:e2::/48 2854 | 2620:e3:8000::/48 2855 | 2620:e3::/48 2856 | 2620:e4:8000::/48 2857 | 2620:e4::/48 2858 | 2620:e5:8000::/48 2859 | 2620:e5::/48 2860 | 2620:e6:8000::/48 2861 | 2620:e6::/48 2862 | 2620:e7::/48 2863 | 2620:e8:8000::/48 2864 | 2620:e8::/48 2865 | 2620:e9:8000::/48 2866 | 2620:e9::/48 2867 | 2620:e:4000::/48 2868 | 2620:e:8000::/48 2869 | 2620:e::/48 2870 | 2620:e:c000::/48 2871 | 2620:ea:8000::/48 2872 | 2620:ea::/44 2873 | 2620:eb:8000::/48 2874 | 2620:eb::/48 2875 | 2620:ec:8000::/48 2876 | 2620:ec::/48 2877 | 2620:ed:8000::/48 2878 | 2620:ed::/48 2879 | 2620:ee:8000::/48 2880 | 2620:ee::/48 2881 | 2620:ef:8000::/48 2882 | 2620:ef::/48 2883 | 2620:f0:8000::/48 2884 | 2620:f0::/48 2885 | 2620:f1:8000::/48 2886 | 2620:f1::/48 2887 | 2620:f2:8000::/48 2888 | 2620:f3:8000::/48 2889 | 2620:f3::/48 2890 | 2620:f4::/48 2891 | 2620:f5:8000::/48 2892 | 2620:f5::/48 2893 | 2620:f6:8000::/48 2894 | 2620:f7:8000::/48 2895 | 2620:f7::/48 2896 | 2620:f8:8000::/48 2897 | 2620:f8::/48 2898 | 2620:f9:8000::/48 2899 | 2620:f9::/44 2900 | 2620:f:4000::/48 2901 | 2620:f:8000::/48 2902 | 2620:f::/46 2903 | 2620:f:c000::/48 2904 | 2620:fa::/48 2905 | 2620:fb:8000::/48 2906 | 2620:fb::/48 2907 | 2620:fc:8000::/48 2908 | 2620:fd:8000::/48 2909 | 2620:fe:8000::/48 2910 | 2620:fe::/48 2911 | 2620:ff:8000::/48 2912 | 2620:ff::/48 2913 | 2800:bc0::/32 2914 | 2a00:5440::/32 2915 | 2a01:5a80::/32 2916 | 2a02:3d0::/32 2917 | 2a03:2840::/32 2918 | 2a03:cd00::/32 -------------------------------------------------------------------------------- /iprange.go: -------------------------------------------------------------------------------- 1 | package iprange 2 | 3 | import ( 4 | "bufio" 5 | "log" 6 | "math/big" 7 | "net" 8 | "os" 9 | "strings" 10 | ) 11 | 12 | // IPV4Range contains two fields. 13 | // One is the net.IPNet and the the other is a uint32 that is the first IP in this IP Range. 14 | type IPV4Range struct { 15 | Start uint32 16 | IPNet *net.IPNet 17 | } 18 | 19 | // IPV6Range contains two fields. 20 | // One is the net.IPNet and the the other is a *big.Int that is the first IP in this IP Range. 21 | type IPV6Range struct { 22 | Start *big.Int 23 | IPNet *net.IPNet 24 | } 25 | 26 | // ParseIPV4RangeFromFile parses a file and returns a slice of IPV4Range. 27 | func ParseIPV4RangeFromFile(fileName string) []*IPV4Range { 28 | var ipranges []*IPV4Range 29 | 30 | file, err := os.Open(fileName) 31 | if err != nil { 32 | log.Fatal(err) 33 | } 34 | defer file.Close() 35 | 36 | scanner := bufio.NewScanner(file) 37 | for scanner.Scan() { 38 | _, ipnet, err := net.ParseCIDR(strings.Trim(scanner.Text(), " ")) 39 | if err == nil { 40 | ipranges = append(ipranges, &IPV4Range{Start: ipv4toInt(ipnet.IP), IPNet: ipnet}) 41 | } 42 | } 43 | 44 | return ipranges 45 | } 46 | 47 | // ParseIPV4Range parses a string and returns a slice of IPV4Range. 48 | func ParseIPV4Range(list string) []*IPV4Range { 49 | var ipranges []*IPV4Range 50 | 51 | scanner := bufio.NewScanner(strings.NewReader(list)) 52 | for scanner.Scan() { 53 | _, ipnet, err := net.ParseCIDR(strings.Trim(scanner.Text(), " ")) 54 | if err == nil { 55 | ipranges = append(ipranges, &IPV4Range{Start: ipv4toInt(ipnet.IP), IPNet: ipnet}) 56 | } 57 | } 58 | 59 | return ipranges 60 | } 61 | 62 | // ParseIPV6RangeFromFile parses a file and returns a slice of IPV6Range. 63 | func ParseIPV6RangeFromFile(fileName string) []*IPV6Range { 64 | var ipranges []*IPV6Range 65 | 66 | file, err := os.Open(fileName) 67 | if err != nil { 68 | log.Fatal(err) 69 | } 70 | defer file.Close() 71 | 72 | scanner := bufio.NewScanner(file) 73 | for scanner.Scan() { 74 | _, ipnet, err := net.ParseCIDR(strings.Trim(scanner.Text(), " ")) 75 | if err == nil { 76 | ipranges = append(ipranges, &IPV6Range{Start: ipv6toInt(ipnet.IP), IPNet: ipnet}) 77 | } 78 | } 79 | 80 | return ipranges 81 | } 82 | 83 | // ParseIPV6Range parses a string and returns a slice of IPV6Range. 84 | func ParseIPV6Range(list string) []*IPV6Range { 85 | var ipranges []*IPV6Range 86 | 87 | scanner := bufio.NewScanner(strings.NewReader(list)) 88 | for scanner.Scan() { 89 | _, ipnet, err := net.ParseCIDR(strings.Trim(scanner.Text(), " ")) 90 | if err == nil { 91 | ipranges = append(ipranges, &IPV6Range{Start: ipv6toInt(ipnet.IP), IPNet: ipnet}) 92 | } 93 | } 94 | 95 | return ipranges 96 | } 97 | -------------------------------------------------------------------------------- /iprange_test.go: -------------------------------------------------------------------------------- 1 | package iprange 2 | 3 | import ( 4 | "io/ioutil" 5 | "testing" 6 | ) 7 | 8 | func TestParseIPV4RangeFromFile(t *testing.T) { 9 | ipRanges := ParseIPV4RangeFromFile("cidr_ipv4_test.data") 10 | testIPv4(t, ipRanges) 11 | } 12 | 13 | func TestParseIPV4Range(t *testing.T) { 14 | b, err := ioutil.ReadFile("cidr_ipv4_test.data") 15 | if err != nil { 16 | t.Error(err) 17 | } 18 | ipRanges := ParseIPV4Range(string(b)) 19 | testIPv4(t, ipRanges) 20 | } 21 | 22 | func testIPv4(t *testing.T, ipRanges []*IPV4Range) { 23 | l := len(ipRanges) 24 | if l != 16048 { 25 | t.Errorf("size of IP: %d but expected: 16048", l) 26 | } 27 | 28 | if ipRanges[0].IPNet.IP.String() != "3.0.0.0" { 29 | t.Errorf("First IP: %s but expected: 3.0.0.0", ipRanges[0].IPNet.IP.String()) 30 | } 31 | 32 | if ipRanges[l-1].IPNet.IP.String() != "216.255.240.0" { 33 | t.Errorf("First IP: %s but expected: 216.255.240.0", ipRanges[l-1].IPNet.IP.String()) 34 | } 35 | } 36 | 37 | func TestParseIPV6RangeFromFile(t *testing.T) { 38 | ipRanges := ParseIPV6RangeFromFile("cidr_ipv6_test.data") 39 | testIPv6(t, ipRanges) 40 | } 41 | 42 | func TestParseIPV6Range(t *testing.T) { 43 | b, err := ioutil.ReadFile("cidr_ipv6_test.data") 44 | if err != nil { 45 | t.Error(err) 46 | } 47 | ipRanges := ParseIPV6Range(string(b)) 48 | testIPv6(t, ipRanges) 49 | } 50 | 51 | func testIPv6(t *testing.T, ipRanges []*IPV6Range) { 52 | l := len(ipRanges) 53 | if l != 2918 { 54 | t.Errorf("size of IP: %d but expected: 2918", l) 55 | } 56 | 57 | if ipRanges[0].IPNet.IP.String() != "2001:1800::" { 58 | t.Errorf("First IP: %s but expected: 2001:1800::", ipRanges[0].IPNet.IP.String()) 59 | } 60 | 61 | if ipRanges[l-1].IPNet.IP.String() != "2a03:cd00::" { 62 | t.Errorf("First IP: %s but expected: 2a03:cd00::", ipRanges[l-1].IPNet.IP.String()) 63 | } 64 | } 65 | -------------------------------------------------------------------------------- /search.go: -------------------------------------------------------------------------------- 1 | package iprange 2 | 3 | import "net" 4 | 5 | // IPv4Contains is used to check whether the IPv4 is in the IPRanges 6 | func IPv4Contains(ipRanges []*IPV4Range, ip net.IP) bool { 7 | if ipRanges == nil || len(ipRanges) == 0 { 8 | return false 9 | } 10 | maxIndex := len(ipRanges) - 1 11 | if maxIndex == 0 { 12 | return ipRanges[0].IPNet.Contains(ip) 13 | } 14 | 15 | ipNum := ipv4toInt(ip) 16 | 17 | low, high := 0, maxIndex 18 | for low <= high { 19 | mid := low + (high-low)/2 20 | if ipRanges[mid].IPNet.Contains(ip) { 21 | return true 22 | } 23 | 24 | if ipRanges[mid].Start < ipNum { 25 | low = mid + 1 26 | } else { 27 | high = mid - 1 28 | } 29 | } 30 | 31 | if low == 0 { 32 | return ipRanges[0].IPNet.Contains(ip) 33 | } 34 | if low == maxIndex+1 { 35 | return ipRanges[maxIndex].IPNet.Contains(ip) 36 | } 37 | 38 | return ipRanges[low-1].IPNet.Contains(ip) 39 | } 40 | 41 | // IPv6Contains is used to check whether the IPv6 is in the IPRanges 42 | func IPv6Contains(ipRanges []*IPV6Range, ip net.IP) bool { 43 | if ipRanges == nil || len(ipRanges) == 0 { 44 | return false 45 | } 46 | maxIndex := len(ipRanges) - 1 47 | if maxIndex == 0 { 48 | return ipRanges[0].IPNet.Contains(ip) 49 | } 50 | 51 | ipNum := ipv6toInt(ip) 52 | 53 | low, high := 0, maxIndex 54 | for low <= high { 55 | mid := low + (high-low)/2 56 | if ipRanges[mid].IPNet.Contains(ip) { 57 | return true 58 | } 59 | 60 | if ipRanges[mid].Start.Cmp(ipNum) < 0 { 61 | low = mid + 1 62 | } else { 63 | high = mid - 1 64 | } 65 | } 66 | 67 | if low == 0 { 68 | return ipRanges[0].IPNet.Contains(ip) 69 | } 70 | if low == maxIndex+1 { 71 | return ipRanges[maxIndex].IPNet.Contains(ip) 72 | } 73 | 74 | return ipRanges[low-1].IPNet.Contains(ip) 75 | } 76 | -------------------------------------------------------------------------------- /search_test.go: -------------------------------------------------------------------------------- 1 | package iprange 2 | 3 | import ( 4 | "net" 5 | "testing" 6 | 7 | "github.com/bradfitz/slice" 8 | ) 9 | 10 | func TestIPv4Contains(t *testing.T) { 11 | ipRanges := ParseIPV4RangeFromFile("cidr_ipv4_test.data") 12 | 13 | //sort. Go 1.8 supports sort.Slice(things, func(i, j int) bool) but it will be released next year 14 | slice.Sort(ipRanges, func(i, j int) bool { 15 | return ipRanges[i].Start < ipRanges[j].Start 16 | }) 17 | 18 | type args struct { 19 | ipRanges []*IPV4Range 20 | ip net.IP 21 | } 22 | tests := []struct { 23 | name string 24 | args args 25 | want bool 26 | }{ 27 | { 28 | name: "MidStart", 29 | args: args{ipRanges: ipRanges, ip: net.ParseIP("103.67.32.0")}, 30 | want: true, 31 | }, 32 | { 33 | name: "MidMid", 34 | args: args{ipRanges: ipRanges, ip: net.ParseIP("103.67.32.1")}, 35 | want: true, 36 | }, 37 | { 38 | name: "MidMissed", 39 | args: args{ipRanges: ipRanges, ip: net.ParseIP("103.67.100.77")}, 40 | want: false, 41 | }, 42 | { 43 | name: "Lowbound", 44 | args: args{ipRanges: ipRanges, ip: net.ParseIP("3.0.0.0")}, 45 | want: true, 46 | }, 47 | { 48 | name: "Upperbound", 49 | args: args{ipRanges: ipRanges, ip: net.ParseIP("216.255.255.255")}, 50 | want: true, 51 | }, 52 | { 53 | name: "Lowbound-1", 54 | args: args{ipRanges: ipRanges, ip: net.ParseIP("2.255.255.255")}, 55 | want: false, 56 | }, 57 | { 58 | name: "Upperbound+1", 59 | args: args{ipRanges: ipRanges, ip: net.ParseIP("217.0.0.0")}, 60 | want: false, 61 | }, 62 | { 63 | name: "First", 64 | args: args{ipRanges: ipRanges, ip: net.ParseIP("0.0.0.0")}, 65 | want: false, 66 | }, 67 | { 68 | name: "Last", 69 | args: args{ipRanges: ipRanges, ip: net.ParseIP("255.255.255.255")}, 70 | want: false, 71 | }, 72 | } 73 | 74 | for _, tt := range tests { 75 | if got := IPv4Contains(tt.args.ipRanges, tt.args.ip); got != tt.want { 76 | t.Errorf("%q. Contains() = %v, want %v", tt.name, got, tt.want) 77 | } 78 | } 79 | } 80 | 81 | func TestIPv6Contains(t *testing.T) { 82 | ipRanges := ParseIPV6RangeFromFile("cidr_ipv6_test.data") 83 | 84 | //sort. Go 1.8 supports sort.Slice(things, func(i, j int) bool) but it will be released next year 85 | slice.Sort(ipRanges, func(i, j int) bool { 86 | return ipRanges[i].Start.Cmp(ipRanges[j].Start) < 0 87 | }) 88 | 89 | type args struct { 90 | ipRanges []*IPV6Range 91 | ip net.IP 92 | } 93 | tests := []struct { 94 | name string 95 | args args 96 | want bool 97 | }{ 98 | { 99 | name: "MidStart", 100 | args: args{ipRanges: ipRanges, ip: net.ParseIP("2607:d200::")}, 101 | want: true, 102 | }, 103 | { 104 | name: "MidMid", 105 | args: args{ipRanges: ipRanges, ip: net.ParseIP("2607:d200::1")}, 106 | want: true, 107 | }, 108 | { 109 | name: "MidMissed", 110 | args: args{ipRanges: ipRanges, ip: net.ParseIP("2607:d201::ffff")}, 111 | want: false, 112 | }, 113 | { 114 | name: "Lowbound", 115 | args: args{ipRanges: ipRanges, ip: net.ParseIP("2001:1800::")}, 116 | want: true, 117 | }, 118 | { 119 | name: "Upperbound", 120 | args: args{ipRanges: ipRanges, ip: net.ParseIP("2a03:cd00:ffff:ffff:ffff:ffff:ffff:ffff")}, 121 | want: true, 122 | }, 123 | { 124 | name: "Lowbound-1", 125 | args: args{ipRanges: ipRanges, ip: net.ParseIP("2001:17ff:ffff:ffff:ffff:ffff:ffff:ffff")}, 126 | want: false, 127 | }, 128 | { 129 | name: "Upperbound+1", 130 | args: args{ipRanges: ipRanges, ip: net.ParseIP("2a03:cd01::")}, 131 | want: false, 132 | }, 133 | { 134 | name: "First", 135 | args: args{ipRanges: ipRanges, ip: net.ParseIP("::")}, 136 | want: false, 137 | }, 138 | { 139 | name: "Last", 140 | args: args{ipRanges: ipRanges, ip: net.ParseIP("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")}, 141 | want: false, 142 | }, 143 | } 144 | 145 | for _, tt := range tests { 146 | if got := IPv6Contains(tt.args.ipRanges, tt.args.ip); got != tt.want { 147 | t.Errorf("%q. Contains() = %v, want %v", tt.name, got, tt.want) 148 | } 149 | } 150 | } 151 | -------------------------------------------------------------------------------- /util.go: -------------------------------------------------------------------------------- 1 | package iprange 2 | 3 | import ( 4 | "encoding/binary" 5 | "math/big" 6 | "net" 7 | ) 8 | 9 | func ipv4toInt(ip net.IP) uint32 { 10 | if len(ip) == 16 { 11 | return binary.BigEndian.Uint32(ip[12:16]) 12 | } 13 | return binary.BigEndian.Uint32(ip) 14 | } 15 | 16 | func inttoIPv4(n uint32) net.IP { 17 | ip := make(net.IP, 4) 18 | binary.BigEndian.PutUint32(ip, n) 19 | return ip 20 | } 21 | 22 | func ipv6toInt(ipv6Address net.IP) *big.Int { 23 | ipv6Int := big.NewInt(0) 24 | ipv6Int.SetBytes(ipv6Address.To16()) 25 | return ipv6Int 26 | } 27 | 28 | func inttoIPv6(n *big.Int) net.IP { 29 | return net.IP(n.Bytes()) 30 | } 31 | --------------------------------------------------------------------------------