386 lines
11 KiB
C#
386 lines
11 KiB
C#
//
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// System.Net.NetworkInformation.NetworkInterface
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//
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// Authors:
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// Gonzalo Paniagua Javier (gonzalo@novell.com)
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// Atsushi Enomoto (atsushi@ximian.com)
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// Miguel de Icaza (miguel@novell.com)
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// Eric Butler (eric@extremeboredom.net)
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// Marek Habersack (mhabersack@novell.com)
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// Marek Safar (marek.safar@gmail.com)
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//
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// Copyright (c) 2006-2008 Novell, Inc. (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Collections.Generic;
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using System.Runtime.InteropServices;
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using System.IO;
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using System.Globalization;
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namespace System.Net.NetworkInformation {
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internal class LinuxNetworkInterfaceAPI : UnixNetworkInterfaceAPI
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{
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const int AF_INET = 2;
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const int AF_INET6 = 10;
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const int AF_PACKET = 17;
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static void FreeInterfaceAddresses (IntPtr ifap)
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{
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#if MONODROID
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AndroidPlatform.FreeInterfaceAddresses (ifap);
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#else
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freeifaddrs (ifap);
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#endif
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}
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static int GetInterfaceAddresses (out IntPtr ifap)
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{
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#if MONODROID
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return AndroidPlatform.GetInterfaceAddresses (out ifap);
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#else
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return getifaddrs (out ifap);
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#endif
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}
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public override NetworkInterface [] GetAllNetworkInterfaces ()
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{
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var interfaces = new Dictionary <string, LinuxNetworkInterface> ();
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IntPtr ifap;
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if (GetInterfaceAddresses (out ifap) != 0)
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throw new SystemException ("getifaddrs() failed");
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try {
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IntPtr next = ifap;
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while (next != IntPtr.Zero) {
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ifaddrs addr = (ifaddrs) Marshal.PtrToStructure (next, typeof (ifaddrs));
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IPAddress address = IPAddress.None;
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string name = addr.ifa_name;
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int index = -1;
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byte[] macAddress = null;
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NetworkInterfaceType type = NetworkInterfaceType.Unknown;
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int nullNameCount = 0;
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if (addr.ifa_addr != IntPtr.Zero) {
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sockaddr_in sockaddr = (sockaddr_in) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_in));
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if (sockaddr.sin_family == AF_INET6) {
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sockaddr_in6 sockaddr6 = (sockaddr_in6) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_in6));
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address = new IPAddress (sockaddr6.sin6_addr.u6_addr8, sockaddr6.sin6_scope_id);
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} else if (sockaddr.sin_family == AF_INET) {
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address = new IPAddress (sockaddr.sin_addr);
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} else if (sockaddr.sin_family == AF_PACKET) {
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sockaddr_ll sockaddrll = (sockaddr_ll) Marshal.PtrToStructure (addr.ifa_addr, typeof (sockaddr_ll));
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if (((int)sockaddrll.sll_halen) > sockaddrll.sll_addr.Length){
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next = addr.ifa_next;
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continue;
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}
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macAddress = new byte [(int) sockaddrll.sll_halen];
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Array.Copy (sockaddrll.sll_addr, 0, macAddress, 0, macAddress.Length);
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index = sockaddrll.sll_ifindex;
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int hwtype = (int)sockaddrll.sll_hatype;
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if (Enum.IsDefined (typeof (LinuxArpHardware), hwtype)) {
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switch ((LinuxArpHardware)hwtype) {
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case LinuxArpHardware.EETHER:
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goto case LinuxArpHardware.ETHER;
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case LinuxArpHardware.ETHER:
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type = NetworkInterfaceType.Ethernet;
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break;
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case LinuxArpHardware.PRONET:
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type = NetworkInterfaceType.TokenRing;
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break;
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case LinuxArpHardware.ATM:
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type = NetworkInterfaceType.Atm;
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break;
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case LinuxArpHardware.SLIP:
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case LinuxArpHardware.CSLIP:
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case LinuxArpHardware.SLIP6:
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case LinuxArpHardware.CSLIP6:
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type = NetworkInterfaceType.Slip;
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break;
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case LinuxArpHardware.PPP:
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type = NetworkInterfaceType.Ppp;
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break;
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case LinuxArpHardware.LOOPBACK:
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type = NetworkInterfaceType.Loopback;
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macAddress = null;
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break;
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case LinuxArpHardware.FDDI:
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type = NetworkInterfaceType.Fddi;
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break;
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case LinuxArpHardware.SIT:
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case LinuxArpHardware.IPDDP:
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case LinuxArpHardware.IPGRE:
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case LinuxArpHardware.IP6GRE:
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case LinuxArpHardware.TUNNEL6:
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case LinuxArpHardware.TUNNEL:
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type = NetworkInterfaceType.Tunnel;
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break;
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}
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}
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}
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}
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LinuxNetworkInterface iface = null;
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if (String.IsNullOrEmpty (name))
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name = "\0" + (++nullNameCount).ToString ();
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if (!interfaces.TryGetValue (name, out iface)) {
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iface = new LinuxNetworkInterface (name);
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interfaces.Add (name, iface);
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}
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if (!address.Equals (IPAddress.None))
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iface.AddAddress (address);
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if (macAddress != null || type == NetworkInterfaceType.Loopback) {
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if (type == NetworkInterfaceType.Ethernet) {
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if (Directory.Exists(iface.IfacePath + "wireless")) {
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type = NetworkInterfaceType.Wireless80211;
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}
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}
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iface.SetLinkLayerInfo (index, macAddress, type);
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}
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next = addr.ifa_next;
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}
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} finally {
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FreeInterfaceAddresses (ifap);
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}
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NetworkInterface [] result = new NetworkInterface [interfaces.Count];
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int x = 0;
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foreach (NetworkInterface thisInterface in interfaces.Values) {
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result [x] = thisInterface;
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x++;
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}
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return result;
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}
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public override int GetLoopbackInterfaceIndex ()
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{
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return if_nametoindex ("lo");
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}
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public override IPAddress GetNetMask (IPAddress address)
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{
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foreach (ifaddrs networkInteface in GetNetworkInterfaces()) {
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if (networkInteface.ifa_addr == IntPtr.Zero)
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continue;
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var sockaddr = (sockaddr_in)Marshal.PtrToStructure(networkInteface.ifa_addr, typeof(sockaddr_in));
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if (sockaddr.sin_family != AF_INET)
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continue;
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if (!address.Equals(new IPAddress(sockaddr.sin_addr)))
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continue;
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var netmask = (sockaddr_in)Marshal.PtrToStructure(networkInteface.ifa_netmask, typeof(sockaddr_in));
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return new IPAddress(netmask.sin_addr);
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}
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return null;
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}
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private static IEnumerable<ifaddrs> GetNetworkInterfaces()
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{
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IntPtr ifap = IntPtr.Zero;
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try {
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if (GetInterfaceAddresses(out ifap) != 0)
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yield break;
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var next = ifap;
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while (next != IntPtr.Zero) {
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var addr = (ifaddrs)Marshal.PtrToStructure(next, typeof(ifaddrs));
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yield return addr;
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next = addr.ifa_next;
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}
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} finally {
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if (ifap != IntPtr.Zero)
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FreeInterfaceAddresses(ifap);
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}
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}
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}
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//
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// This class needs support from the libsupport.so library to fetch the
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// data using arch-specific ioctls.
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//
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// For this to work, we have to create this on the factory above.
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//
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sealed class LinuxNetworkInterface : UnixNetworkInterface
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{
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//NetworkInterfaceType type;
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string iface_path;
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string iface_operstate_path;
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string iface_flags_path;
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#if MONODROID
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[DllImport ("__Internal")]
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static extern int _monodroid_get_android_api_level ();
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[DllImport ("__Internal")]
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static extern bool _monodroid_get_network_interface_up_state (string ifname, ref bool is_up);
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[DllImport ("__Internal")]
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static extern bool _monodroid_get_network_interface_supports_multicast (string ifname, ref bool supports_multicast);
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bool android_use_java_api;
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#endif
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internal string IfacePath {
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get { return iface_path; }
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}
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internal LinuxNetworkInterface (string name)
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: base (name)
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{
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iface_path = "/sys/class/net/" + name + "/";
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iface_operstate_path = iface_path + "operstate";
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iface_flags_path = iface_path + "flags";
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#if MONODROID
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android_use_java_api = _monodroid_get_android_api_level () >= 24;
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#endif
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}
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public override IPInterfaceProperties GetIPProperties ()
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{
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if (ipproperties == null)
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ipproperties = new LinuxIPInterfaceProperties (this, addresses);
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return ipproperties;
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}
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public override IPv4InterfaceStatistics GetIPv4Statistics ()
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{
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if (ipv4stats == null)
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ipv4stats = new LinuxIPv4InterfaceStatistics (this);
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return ipv4stats;
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}
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public override OperationalStatus OperationalStatus {
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get {
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#if MONODROID
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if (android_use_java_api) {
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// Starting from API 24 (Android 7 "Nougat") Android restricts access to many
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// files in the /sys filesystem (see https://code.google.com/p/android/issues/detail?id=205565
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// for more information) and therefore we are forced to call into Java API in
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// order to get the information. Alas, what we can obtain in this way is quite
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// limited. In the case of OperationalStatus we can only determine whether the
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// interface is up or down. There is a way to get more detailed information but
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// it requires an instance of the Android Context class which is not available
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// to us here.
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bool is_up = false;
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if (_monodroid_get_network_interface_up_state (Name, ref is_up))
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return is_up ? OperationalStatus.Up : OperationalStatus.Down;
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else
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return OperationalStatus.Unknown;
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}
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#endif
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if (!Directory.Exists (iface_path))
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return OperationalStatus.Unknown;
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try {
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string s = ReadLine (iface_operstate_path);
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switch (s){
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case "unknown":
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return OperationalStatus.Unknown;
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case "notpresent":
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return OperationalStatus.NotPresent;
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case "down":
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return OperationalStatus.Down;
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case "lowerlayerdown":
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return OperationalStatus.LowerLayerDown;
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case "testing":
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return OperationalStatus.Testing;
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case "dormant":
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return OperationalStatus.Dormant;
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case "up":
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return OperationalStatus.Up;
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}
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} catch {
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}
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return OperationalStatus.Unknown;
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}
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}
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public override bool SupportsMulticast {
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get {
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#if MONODROID
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if (android_use_java_api) {
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// Starting from API 24 (Android 7 "Nougat") Android restricts access to many
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// files in the /sys filesystem (see https://code.google.com/p/android/issues/detail?id=205565
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// for more information) and therefore we are forced to call into Java API in
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// order to get the information.
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bool supports_multicast = false;
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_monodroid_get_network_interface_supports_multicast (Name, ref supports_multicast);
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return supports_multicast;
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}
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#endif
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if (!Directory.Exists (iface_path))
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return false;
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try {
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string s = ReadLine (iface_flags_path);
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if (s.Length > 2 && s [0] == '0' && s [1] == 'x')
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s = s.Substring (2);
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ulong f = UInt64.Parse (s, NumberStyles.HexNumber);
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// Hardcoded, only useful for Linux.
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return ((f & 0x1000) == 0x1000);
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} catch {
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return false;
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}
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}
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}
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internal static string ReadLine (string path)
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{
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using (FileStream fs = File.OpenRead (path)){
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using (StreamReader sr = new StreamReader (fs)){
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return sr.ReadLine ();
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}
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}
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}
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}
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}
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