72 lines
1.7 KiB
Dart
72 lines
1.7 KiB
Dart
class Util {
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static List<Map<String, int>> subnety() {
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var list = <Map<String, int>>[
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{
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"prefix": 30,
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"hosti": 4,
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}
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];
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for (int i = 30; i > 8; i--) {
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list.add({"prefix": i - 1, "hosti": list[30 - i]["hosti"]! * 2});
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}
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return list;
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}
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static List<String> _strToBin(String input) {
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var list = <String>[];
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input.split(".").forEach((numero) {
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var bin = int.parse(numero).toRadixString(2);
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while (bin.length < 8) {
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bin = "0$bin";
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}
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list.add(bin);
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});
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return list;
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}
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static List<String> _binToStr(List<String> input) {
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var list = <String>[];
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for (var numero in input) {
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list.add(int.parse(numero, radix: 2).toString());
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}
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return list;
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}
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static String prefixToMask(String prefix) {
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var bin = "1" * int.parse(prefix);
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while (bin.length < 32) {
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bin += "0";
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}
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var match = RegExp(r"\d{8}").allMatches(bin);
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return _binToStr(match
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.map(
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(e) => e.group(0)!,
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)
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.toList())
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.join(".");
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}
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static String ipToNetworkAdd(String ip, String nm) {
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var nmBin = _strToBin(nm);
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var ipBin = _strToBin(ip);
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var networkAdd = <String>[];
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for (int i = 0; i < 4; i++) {
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var nmBinChar = nmBin[i].split("");
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var ipBinChar = ipBin[i].split("");
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var networkAddChar = <String>[];
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for (int j = 0; j < 8; j++) {
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if (nmBinChar[j] == "1" && ipBinChar[j] == "1") {
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networkAddChar.add(ipBinChar[j]);
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} else {
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networkAddChar.add("0");
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}
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}
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networkAdd.add(networkAddChar.join());
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}
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return _binToStr(networkAdd).join(".");
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}
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static const String alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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}
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