private PingReply SendPingCore(IPAddress address, byte[] buffer, int timeout, PingOptions?options)
{
PingReply reply = RawSocketPermissions.CanUseRawSockets(address.AddressFamily) ?
SendIcmpEchoRequestOverRawSocket(address, buffer, timeout, options) :
SendWithPingUtility(address, buffer, timeout, options);
return(reply);
}
private Socket GetRawSocket(SocketConfig socketConfig)
{
IPEndPoint ep = (IPEndPoint)socketConfig.EndPoint;
AddressFamily addrFamily = ep.Address.AddressFamily;
SocketType socketType = RawSocketPermissions.CanUseRawSockets(addrFamily) ?
SocketType.Raw :
SocketType.Dgram; // macOS/iOS has ability to send ICMP echo without RAW
Socket socket = new Socket(addrFamily, socketType, socketConfig.ProtocolType);
socket.ReceiveTimeout = socketConfig.Timeout;
socket.SendTimeout = socketConfig.Timeout;
if (addrFamily == AddressFamily.InterNetworkV6 && OperatingSystem.IsMacOS())
{
socket.DualMode = false;
}
if (socketConfig.Options != null)
{
if (socketConfig.Options.Ttl > 0)
{
socket.Ttl = (short)socketConfig.Options.Ttl;
}
if (addrFamily == AddressFamily.InterNetwork)
{
if (SendIpHeader)
{
// some platforms like OSX don't support DontFragment so we construct IP header instead.
socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.HeaderIncluded, 1);
}
else
{
socket.DontFragment = socketConfig.Options.DontFragment;
}
}
}
#pragma warning disable 618
// Disable warning about obsolete property. We could use GetAddressBytes but that allocates.
// IPv4 multicast address starts with 1110 bits so mask rest and test if we get correct value e.g. 0xe0.
if (NeedsConnect && !ep.Address.IsIPv6Multicast && !(addrFamily == AddressFamily.InterNetwork && (ep.Address.Address & 0xf0) == 0xe0))
{
// If it is not multicast, use Connect to scope responses only to the target address.
socket.Connect(socketConfig.EndPoint);
}
#pragma warning restore 618
return(socket);
}
private async Task <PingReply> SendPingAsyncCore(IPAddress address, byte[] buffer, int timeout, PingOptions options)
{
try
{
Task <PingReply> t = RawSocketPermissions.CanUseRawSockets() ?
SendIcmpEchoRequestOverRawSocket(address, buffer, timeout, options) :
SendWithPingUtility(address, buffer, timeout, options);
return(await t.ConfigureAwait(false));
}
finally
{
Finish();
}
}
private async Task <PingReply> SendPingAsyncCore(IPAddress address, byte[] buffer, int timeout, PingOptions?options)
{
Task <PingReply> t = RawSocketPermissions.CanUseRawSockets(address.AddressFamily) ?
SendIcmpEchoRequestOverRawSocketAsync(address, buffer, timeout, options) :
SendWithPingUtilityAsync(address, buffer, timeout, options);
PingReply reply = await t.ConfigureAwait(false);
if (_canceled)
{
throw new OperationCanceledException();
}
return(reply);
}
public static bool CanUseRawSockets()
{
return(RawSocketPermissions.CanUseRawSockets());
}
public static bool CanUseRawSockets(AddressFamily addressFamily)
{
return(RawSocketPermissions.CanUseRawSockets(addressFamily));
}