@ -1,84 +1,16 @@
using Common.Messaging ;
using CommunityToolkit.Mvvm.ComponentModel ;
using CommunityToolkit.Mvvm.Messaging ;
using MultiTerm.Protocols.Types ;
using System.Net ;
using System.Net.NetworkInformation ;
using System.Net.Sockets ;
using CommunityToolkit.Mvvm.Messaging ;
using MultiTerm.Protocols.Network ;
namespace MultiTerm.Protocols.Udp ;
public partial class UdpProtocolSettingsViewModel : ProtocolSettingsViewModel , IUdpProtocolSettings , IRecipient < UdpConnectedMessage >
public partial class UdpProtocolSettingsViewModel : NetworkProtocolSettingsViewModel , IRecipient < UdpConnectedMessage >
{
public override Types . ProtocolType ProtocolType = > Types . ProtocolType . Udp ;
#region IUdpProtocolSettings Implementation
[ObservableProperty]
private string hostname = string . Empty ;
[ObservableProperty]
private int port = 1 0 0 0 0 ;
# endregion
/// <summary>
/// A property to display the resolved IP address that the protocol connected to.
/// </summary>
[ObservableProperty]
private string resolvedAddress = string . Empty ;
public UdpProtocolSettingsViewModel ( IMessenger messenger ) : base ( messenger )
{
// register for messages
messenger . Register ( this ) ;
// initialize IP address with first ethernet adapter local IP
this . Hostname = GetFirstEthernetAdaptersSubnet ( ) ;
}
public bool AreValid ( )
{
if ( String . IsNullOrEmpty ( this . Hostname ) )
{
this . messenger . Send < IUserInterfaceMessage > ( new ProtocolSettingsInvalidMessage ( nameof ( this . Hostname ) , "Null or empty" ) ) ;
return false ;
}
if ( this . Port < IPEndPoint . MinPort & & this . Port > IPEndPoint . MaxPort )
{
this . messenger . Send < IUserInterfaceMessage > ( new ProtocolSettingsInvalidMessage ( nameof ( this . Port ) , "Out of range" ) ) ;
return false ;
}
// try parse to IP address
if ( IPAddress . TryParse ( this . Hostname , out _ ) )
{
return true ;
}
// else try to resolve hostname
else
{
IPHostEntry host ;
try
{
host = Dns . GetHostEntry ( this . Hostname ) ;
}
catch ( ArgumentOutOfRangeException )
{
this . messenger . Send < IUserInterfaceMessage > ( new ProtocolSettingsInvalidMessage ( nameof ( this . Hostname ) , "Length is greater than 255 characters" ) ) ;
return false ;
}
catch ( SocketException )
{
this . messenger . Send < IUserInterfaceMessage > ( new ProtocolSettingsInvalidMessage ( nameof ( this . Hostname ) , "Error encountered when resolving hostname" ) ) ;
return false ;
}
catch ( ArgumentException )
{
this . messenger . Send < IUserInterfaceMessage > ( new ProtocolSettingsInvalidMessage ( nameof ( this . Hostname ) , "Invalid IP address" ) ) ;
return false ;
}
// host not null and found at least one address => success
return host ! = null & & host . AddressList . Length > 0 ;
}
}
/// <summary>
@ -89,41 +21,4 @@ public partial class UdpProtocolSettingsViewModel : ProtocolSettingsViewModel, I
{
this . ResolvedAddress = message . ResolvedAddress . ToString ( ) ;
}
/// <summary>
/// Tries to retrieve the first ethernet adapters subnet address.
/// </summary>
/// <returns>string of <see cref="IPAddress"/> of the first ethernet adapters subnet address, or <see cref="string.Empty"/> if not found</returns>
private static string GetFirstEthernetAdaptersSubnet ( )
{
// iterate through all network interfaces
NetworkInterface [ ] interfaces = NetworkInterface . GetAllNetworkInterfaces ( ) ;
foreach ( var adapter in interfaces )
{
// return first found ipv4 adapter subnet address
if ( adapter . OperationalStatus = = OperationalStatus . Up )
{
try
{
var unicastAddresses = adapter . GetIPProperties ( ) . UnicastAddresses ;
foreach ( var unicastAddress in unicastAddresses )
{
// only interested in IPv4
if ( unicastAddress . Address . AddressFamily ! = AddressFamily . InterNetwork )
continue ;
// Ignore loopback addresses (e.g., 127.0.0.1)
if ( IPAddress . IsLoopback ( unicastAddress . Address ) )
continue ;
// split and only return first three parts of the IPv4 address
var splitIpv4 = unicastAddress . Address . ToString ( ) . Split ( '.' ) ;
return $"{splitIpv4[0]}.{splitIpv4[1]}.{splitIpv4[2]}." ;
}
}
catch { }
}
}
return string . Empty ;
}
}
Jonas Arnold
3 years ago