lduchosal / ipnetwork / 960

Committed 15 May 2026 07:18AM UTC coverage: 0.0% (-94.1%) from 94.053%

Build # 960

Build Type

Pull #411

appveyor

Committed by

web-flow

Commit Message

Merge ef6b054ce into 4cec191ae

Pull Request Pull Request #411: Bump MSTest.TestFramework from 4.2.2 to 4.2.3

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/src/System.Net.IPNetwork/CidrClassFull.cs

﻿// <copyright file="CidrClassFull.cs" company="IPNetwork">
// Copyright (c) IPNetwork. All rights reserved.
// </copyright>

namespace System.Net;

using System.Net.Sockets;

/// <summary>
/// Class <c>CidrClassFull</c> tries to guess CIDR in a ClassFull way.
/// </summary>
public sealed class CidrClassFull : ICidrGuess
{
    /// <summary>
    ///
    /// IPV4 :
    ///
    /// Class              Leading bits    Default netmask
    ///     A (CIDR /8)        00           255.0.0.0
    ///     A (CIDR /8)        01           255.0.0.0
    ///     B (CIDR /16)       10           255.255.0.0
    ///     C (CIDR /24)       11           255.255.255.0
    ///
    /// IPV6 : 64.
    ///
    /// </summary>
    /// <param name="ip">A string representing the CIDR to convert.</param>
    /// <param name="cidr">A byte representing the netmask in cidr format (/24).</param>
    /// <returns>true if ip was converted successfully; otherwise, false.</returns>
    public bool TryGuessCidr(string? ip, out byte cidr)
    {
        if (!IPAddress.TryParse($"{ip}", out var ipaddress))
        {
            cidr = 0;
            return false;
        }

        if (ipaddress.AddressFamily == AddressFamily.InterNetworkV6)
        {
            cidr = 64;
            return true;
        }

        var uintIPAddress = IPNetwork2.ToBigInteger(ipaddress);
        uintIPAddress >>= 30;
        if (uintIPAddress <= 1)
        {
            cidr = 8;
            return true;
        }

        if (uintIPAddress <= 2)
        {
            cidr = 16;
            return true;
        }

        if (uintIPAddress <= 3)
        {
            cidr = 24;
            return true;
        }

        cidr = 0;
        return false;
    }
}

1	// <copyright file="CidrClassFull.cs" company="IPNetwork">
2	// Copyright (c) IPNetwork. All rights reserved.
3	// </copyright>
4
5	namespace System.Net;
6
7	using System.Net.Sockets;
8
9	/// <summary>
10	/// Class <c>CidrClassFull</c> tries to guess CIDR in a ClassFull way.
11	/// </summary>
12	public sealed class CidrClassFull : ICidrGuess
13	{
14	/// <summary>
15	///
16	/// IPV4 :
17	///
18	/// Class Leading bits Default netmask
19	/// A (CIDR /8) 00 255.0.0.0
20	/// A (CIDR /8) 01 255.0.0.0
21	/// B (CIDR /16) 10 255.255.0.0
22	/// C (CIDR /24) 11 255.255.255.0
23	///
24	/// IPV6 : 64.
25	///
26	/// </summary>
27	/// <param name="ip">A string representing the CIDR to convert.</param>
28	/// <param name="cidr">A byte representing the netmask in cidr format (/24).</param>
29	/// <returns>true if ip was converted successfully; otherwise, false.</returns>
30	public bool TryGuessCidr(string? ip, out byte cidr)
31	{	×
32	if (!IPAddress.TryParse($"{ip}", out var ipaddress))	×
33	{	×
34	cidr = 0;	×
35	return false;	×
36	}
37
38	if (ipaddress.AddressFamily == AddressFamily.InterNetworkV6)	×
39	{	×
40	cidr = 64;	×
41	return true;	×
42	}
43
44	var uintIPAddress = IPNetwork2.ToBigInteger(ipaddress);	×
45	uintIPAddress >>= 30;	×
46	if (uintIPAddress <= 1)	×
47	{	×
48	cidr = 8;	×
49	return true;	×
50	}
51
52	if (uintIPAddress <= 2)	×
53	{	×
54	cidr = 16;	×
55	return true;	×
56	}
57
58	if (uintIPAddress <= 3)	×
59	{	×
60	cidr = 24;	×
61	return true;	×
62	}
63
64	cidr = 0;	×
65	return false;	×
66	}	×
67	}

lduchosal / ipnetwork / 960

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