62 lines
1.7 KiB
C#
62 lines
1.7 KiB
C#
/*
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if ipAddress consists of 4 numbers
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and
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if each ipAddress number has no leading zeroes
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and
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if each ipAddress number is in range 0 - 255
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then ipAddress is valid
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else ipAddress is invalid
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*/
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string ip_addr_1 = "94.88.1.16";
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string ip_addr_2 = "255.0.0.255";
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string ip_addr_3 = "555..0.555";
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string ip_addr_4 = "255.015.0.255";
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string ip_addr_5 = "16.f.0.16";
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string[] ip_addrs = {ip_addr_1, ip_addr_2, ip_addr_3, ip_addr_4, ip_addr_5};
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bool validate_ip(string ipv4) {
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bool valid = false;
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bool lenght = false;
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bool zeroes = false;
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bool range = false;
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string[] ip_segs = ipv4.Split('.');
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foreach (string segm in ip_segs){
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lenght = segm.Length>0 && segm.Length<=3;
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if(lenght){
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Int16 segment;
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valid = Int16.TryParse(segm, out segment);
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if(!valid){
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Console.Write($"({segm}) is a invalid ipv4 segment! ");
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return false;
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} else {
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if(segm.StartsWith("0") && segm.Length > 1 || segment < 0 || segment > 255){
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Console.Write($"({segm}) is a invalid ipv4 range! ");
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return false;
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} else {
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range = true;
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zeroes = true;
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}
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}
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} else {
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Console.Write($"({segm}) is a invalid ipv4 lenght! ");
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return false;
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}
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}
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if(valid && zeroes && lenght && range) {
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return true;
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} else {
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return false;
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}
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}
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foreach (string ip_addr in ip_addrs){
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if(validate_ip(ip_addr)){
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Console.WriteLine($"{ip_addr} is a valid IP");
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} else {
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Console.WriteLine($"{ip_addr} is not a valid IP");
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}
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}
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