Question

我试图获取当前使用的网络适配器。例如，如果我在ASP.NET Core中收到Web请求，我想知道正在使用哪个适配器来处理该请求。

谢谢！

Answer 1

您可以使用HttpContext.Connection.LocalIpAddress property获取连接本地（服务器）端的IP地址，然后找到绑定到该地址的NetworkInterface实例。

using System.Linq;
using System.Net.NetworkInformation;
using Microsoft.AspNetCore.Mvc;
using Newtonsoft.Json;

namespace WebApplication1.Controllers
{
    public class HomeController : Controller
    {
        public IActionResult GetInterfaceInfo()
        {
            var connectionLocalAddress = HttpContext.Connection.LocalIpAddress;
            var connectionLocalInterface = NetworkInterface.GetAllNetworkInterfaces()
                .Where(iface => iface.GetIPProperties().UnicastAddresses.Any(unicastInfo => unicastInfo.Address.Equals(connectionLocalAddress)))
                .SingleOrDefault();
            var results = new {
                NetworkInterface = connectionLocalInterface,
                IPInterfaceProperties = connectionLocalInterface?.GetIPProperties(),
                IPInterfaceStatistics = connectionLocalInterface?.GetIPStatistics(),
                IPv4InterfaceStatistics = connectionLocalInterface?.GetIPv4Statistics()
            };

            return Json(
                results,
                new JsonSerializerSettings() {
                    ContractResolver = new IgnorePropertyExceptionsResolver(),
                    Formatting = Formatting.Indented
                }
            );
        }
    }
}

访问http://localhost:12345/Home/GetInterfaceInfo然后生成......

{
    "NetworkInterface": {
        "Id": "{01234567-ABCD-EF01-2345-6789ABCDEF01}",
        "Name": "Loopback Pseudo-Interface 1",
        "Description": "Software Loopback Interface 1",
        "NetworkInterfaceType": 24,
        "OperationalStatus": 1,
        "Speed": 1073741824,
        "IsReceiveOnly": false,
        "SupportsMulticast": true
    },
    "IPInterfaceProperties": {
        "IsDnsEnabled": false,
        "IsDynamicDnsEnabled": true,
        "DnsSuffix": "",
        "AnycastAddresses": [],
        "UnicastAddresses": [
            {
                "Address": {
                    "AddressFamily": 23,
                    "ScopeId": 0,
                    "IsIPv6Multicast": false,
                    "IsIPv6LinkLocal": false,
                    "IsIPv6SiteLocal": false,
                    "IsIPv6Teredo": false,
                    "IsIPv4MappedToIPv6": false
                },
                "IPv4Mask": {
                    "AddressFamily": 2,
                    "IsIPv6Multicast": false,
                    "IsIPv6LinkLocal": false,
                    "IsIPv6SiteLocal": false,
                    "IsIPv6Teredo": false,
                    "IsIPv4MappedToIPv6": false,
                    "Address": 0
                },
                "PrefixLength": 128,
                "IsTransient": false,
                "IsDnsEligible": false,
                "PrefixOrigin": 2,
                "SuffixOrigin": 2,
                "DuplicateAddressDetectionState": 4,
                "AddressValidLifetime": 4294967295,
                "AddressPreferredLifetime": 4294967295,
                "DhcpLeaseLifetime": 1542939
            },
            {
                "Address": {
                    "AddressFamily": 2,
                    "IsIPv6Multicast": false,
                    "IsIPv6LinkLocal": false,
                    "IsIPv6SiteLocal": false,
                    "IsIPv6Teredo": false,
                    "IsIPv4MappedToIPv6": false,
                    "Address": 16777343
                },
                "IPv4Mask": {
                    "AddressFamily": 2,
                    "IsIPv6Multicast": false,
                    "IsIPv6LinkLocal": false,
                    "IsIPv6SiteLocal": false,
                    "IsIPv6Teredo": false,
                    "IsIPv4MappedToIPv6": false,
                    "Address": 255
                },
                "PrefixLength": 8,
                "IsTransient": false,
                "IsDnsEligible": false,
                "PrefixOrigin": 2,
                "SuffixOrigin": 2,
                "DuplicateAddressDetectionState": 4,
                "AddressValidLifetime": 4294967295,
                "AddressPreferredLifetime": 4294967295,
                "DhcpLeaseLifetime": 1542939
            }
        ],
        "MulticastAddresses": [
            {
                "Address": {
                    "AddressFamily": 23,
                    "ScopeId": 1,
                    "IsIPv6Multicast": true,
                    "IsIPv6LinkLocal": false,
                    "IsIPv6SiteLocal": false,
                    "IsIPv6Teredo": false,
                    "IsIPv4MappedToIPv6": false
                },
                "IsTransient": false,
                "IsDnsEligible": false,
                "PrefixOrigin": 0,
                "SuffixOrigin": 0,
                "DuplicateAddressDetectionState": 0,
                "AddressValidLifetime": 0,
                "AddressPreferredLifetime": 0,
                "DhcpLeaseLifetime": 0
            },
            {
                "Address": {
                    "AddressFamily": 2,
                    "IsIPv6Multicast": false,
                    "IsIPv6LinkLocal": false,
                    "IsIPv6SiteLocal": false,
                    "IsIPv6Teredo": false,
                    "IsIPv4MappedToIPv6": false,
                    "Address": 4211081199
                },
                "IsTransient": false,
                "IsDnsEligible": false,
                "PrefixOrigin": 0,
                "SuffixOrigin": 0,
                "DuplicateAddressDetectionState": 0,
                "AddressValidLifetime": 0,
                "AddressPreferredLifetime": 0,
                "DhcpLeaseLifetime": 0
            }
        ],
        "DnsAddresses": [
            {
                "AddressFamily": 23,
                "ScopeId": 1,
                "IsIPv6Multicast": false,
                "IsIPv6LinkLocal": false,
                "IsIPv6SiteLocal": true,
                "IsIPv6Teredo": false,
                "IsIPv4MappedToIPv6": false
            },
            {
                "AddressFamily": 23,
                "ScopeId": 1,
                "IsIPv6Multicast": false,
                "IsIPv6LinkLocal": false,
                "IsIPv6SiteLocal": true,
                "IsIPv6Teredo": false,
                "IsIPv4MappedToIPv6": false
            },
            {
                "AddressFamily": 23,
                "ScopeId": 1,
                "IsIPv6Multicast": false,
                "IsIPv6LinkLocal": false,
                "IsIPv6SiteLocal": true,
                "IsIPv6Teredo": false,
                "IsIPv4MappedToIPv6": false
            }
        ],
        "GatewayAddresses": [],
        "DhcpServerAddresses": [],
        "WinsServersAddresses": []
    },
    "IPInterfaceStatistics": {
        "OutputQueueLength": 0,
        "BytesSent": 0,
        "BytesReceived": 0,
        "UnicastPacketsSent": 0,
        "UnicastPacketsReceived": 0,
        "NonUnicastPacketsSent": 0,
        "NonUnicastPacketsReceived": 0,
        "IncomingPacketsDiscarded": 0,
        "OutgoingPacketsDiscarded": 0,
        "IncomingPacketsWithErrors": 0,
        "OutgoingPacketsWithErrors": 0,
        "IncomingUnknownProtocolPackets": 0
    },
    "IPv4InterfaceStatistics": {
        "OutputQueueLength": 0,
        "BytesSent": 0,
        "BytesReceived": 0,
        "UnicastPacketsSent": 0,
        "UnicastPacketsReceived": 0,
        "NonUnicastPacketsSent": 0,
        "NonUnicastPacketsReceived": 0,
        "IncomingPacketsDiscarded": 0,
        "OutgoingPacketsDiscarded": 0,
        "IncomingPacketsWithErrors": 0,
        "OutgoingPacketsWithErrors": 0,
        "IncomingUnknownProtocolPackets": 0
    }
}

IgnorePropertyExceptionsResolver课程来自Ignoring class members that throw exceptions when serializing to JSON，看起来像这样......

using System.Reflection;
using Newtonsoft.Json;
using Newtonsoft.Json.Serialization;

namespace WebApplication1.Controllers
{
    internal class IgnorePropertyExceptionsResolver : DefaultContractResolver
    {
        protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)
        {
            var jsonProperty = base.CreateProperty(member, memberSerialization);

            jsonProperty.ShouldSerialize = instance => {
                try
                {
                    var instanceProperty = (PropertyInfo) member;

                    if (instanceProperty.CanRead)
                    {
                        instanceProperty.GetValue(instance, null);

                        return true;
                    }
                }
                catch
                {
                }

                return false;
            };

            return jsonProperty;
        }
    }
}

我使用此类的原因是因为IPAddress的集合属性中的某些results.IPInterfaceProperties对象在访问其Address属性时会抛出异常，因此解析器只是省略使输出有效的违规属性。当然，您将直接访问这些对象，而不是首先将它们转换为JSON，因此该类仅对此演示代码非常需要。

获取当前正在使用的网络适配器

1 个答案: