83 lines
3.0 KiB
C#
83 lines
3.0 KiB
C#
 
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using Android.Content;
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using Android.Net;
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using Android.Net.Wifi;
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using MeWeb.Core.Net;
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namespace MeWeb.Android;
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public class AndroidPlatform : SystemPlatform
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{
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static Context Context => global::Android.App.Application.Context;
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public override DeviceKind Device => DeviceKind.Phone;
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public override IDisposable AllowMulticast()
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{
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if (Context.GetSystemService(Context.WifiService) is not WifiManager wifi) return base.AllowMulticast();
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var multicast = wifi.CreateMulticastLock("meweb");
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multicast.SetReferenceCounted(false);
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multicast.Acquire();
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return new Held(multicast);
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}
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public override LocalSnapshot ReadNetwork()
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{
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var snapshot = new LocalSnapshot();
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if (Context.GetSystemService(Context.ConnectivityService) is not ConnectivityManager connectivity) return base.ReadNetwork();
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var network = connectivity.ActiveNetwork;
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if (network is null) return snapshot;
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var link = connectivity.GetLinkProperties(network);
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var capabilities = connectivity.GetNetworkCapabilities(network);
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if (link is null) return base.ReadNetwork();
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var item = new LocalInterface
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{
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Name = link.InterfaceName,
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Kind = capabilities switch
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{
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not null when capabilities.HasTransport(TransportType.Wifi) => LinkKind.Wifi,
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not null when capabilities.HasTransport(TransportType.Cellular) => LinkKind.Mobile,
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not null when capabilities.HasTransport(TransportType.Ethernet) => LinkKind.Cable,
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_ => LinkKind.Unknown,
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},
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};
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foreach (var address in link.LinkAddresses)
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{
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var text = Usable(address.Address?.HostAddress);
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if (text is not null) item.Addresses.Add(text);
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}
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foreach (var route in link.Routes)
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{
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var gateway = route.Gateway?.HostAddress;
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if (!route.IsDefaultRoute || gateway is null || gateway is "0.0.0.0" or "::") continue;
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if (!item.Gateways.Contains(gateway)) item.Gateways.Add(gateway);
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}
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item.Gateways = item.Gateways.OrderBy(g => g.Contains(':') ? 1 : 0).ToList();
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if (item.Kind == LinkKind.Wifi) item.SpeedMbps = WifiSpeed(capabilities);
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snapshot.Interfaces.Add(item);
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snapshot.Dns = link.DnsServers.Select(d => d.HostAddress).Where(d => d is not null).Distinct().ToList();
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return snapshot;
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}
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static string Usable(string text)
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{
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var address = Addresses.Parse(text?.Split('%')[0]);
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if (address is null) return null;
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return Addresses.Classify(address) is AddressKind.Loopback or AddressKind.LinkLocal or AddressKind.Unspecified ? null : address.ToString();
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}
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static long WifiSpeed(NetworkCapabilities capabilities)
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{
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if (OperatingSystem.IsAndroidVersionAtLeast(29) && capabilities?.TransportInfo is WifiInfo info) return Math.Max(0, info.LinkSpeed);
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return Context.GetSystemService(Context.WifiService) is WifiManager wifi ? Math.Max(0, wifi.ConnectionInfo?.LinkSpeed ?? 0) : 0;
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}
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sealed class Held(WifiManager.MulticastLock multicast) : IDisposable
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{
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public void Dispose()
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{
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if (multicast.IsHeld) multicast.Release();
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}
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}
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}
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