| public static EnsureSocketsAreInitialized ( ) : void | ||
| return | void | |
public static IPAddress[] GetHostAddresses(string hostNameOrAddress)
{
if (NetEventSource.IsEnabled)
{
NetEventSource.Enter(hostNameOrAddress, hostNameOrAddress);
}
NameResolutionPal.EnsureSocketsAreInitialized();
if (hostNameOrAddress is null)
{
throw new ArgumentNullException(nameof(hostNameOrAddress));
}
// See if it's an IP Address.
IPAddress[] addresses;
if (IPAddress.TryParse(hostNameOrAddress, out IPAddress address))
{
if (address.Equals(IPAddress.Any) || address.Equals(IPAddress.IPv6Any))
{
if (NetEventSource.IsEnabled)
{
NetEventSource.Error(address, $"Invalid address '{address}'");
}
throw new ArgumentException(SR.Format(SR.net_invalid_ip_addr, nameof(hostNameOrAddress)));
}
addresses = new IPAddress[] { address };
}
else
{
addresses = GetHostAddressesCore(hostNameOrAddress);
}
if (NetEventSource.IsEnabled)
{
NetEventSource.Exit(hostNameOrAddress, addresses);
}
return(addresses);
}
} // GetHostEntry
public static IPAddress[] GetHostAddresses(string hostNameOrAddress)
{
if (NetEventSource.IsEnabled)
{
NetEventSource.Enter(null, hostNameOrAddress);
}
NameResolutionPal.EnsureSocketsAreInitialized();
if (hostNameOrAddress == null)
{
throw new ArgumentNullException(nameof(hostNameOrAddress));
}
// See if it's an IP Address.
IPAddress address;
IPAddress[] addresses;
if (IPAddress.TryParse(hostNameOrAddress, out address))
{
if (address.Equals(IPAddress.Any) || address.Equals(IPAddress.IPv6Any))
{
throw new ArgumentException(SR.Format(SR.net_invalid_ip_addr, nameof(hostNameOrAddress)));
}
addresses = new IPAddress[] { address };
}
else
{
// InternalGetHostByName works with IP addresses (and avoids a reverse-lookup), but we need
// explicit handling in order to do the ArgumentException and guarantee the behavior.
addresses = InternalGetHostByName(hostNameOrAddress).AddressList;
}
if (NetEventSource.IsEnabled)
{
NetEventSource.Exit(null, addresses);
}
return(addresses);
}
} // EndGetHostByName()
public static IPHostEntry GetHostEntry(string hostNameOrAddress)
{
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Enter(NetEventSource.ComponentType.Socket, "DNS", "GetHostEntry", hostNameOrAddress);
}
NameResolutionPal.EnsureSocketsAreInitialized();
if (hostNameOrAddress == null)
{
throw new ArgumentNullException(nameof(hostNameOrAddress));
}
// See if it's an IP Address.
IPAddress address;
IPHostEntry ipHostEntry;
if (IPAddress.TryParse(hostNameOrAddress, out address))
{
if (address.Equals(IPAddress.Any) || address.Equals(IPAddress.IPv6Any))
{
throw new ArgumentException(SR.Format(SR.net_invalid_ip_addr, nameof(hostNameOrAddress)));
}
ipHostEntry = InternalGetHostByAddress(address, true);
}
else
{
ipHostEntry = InternalGetHostByName(hostNameOrAddress, true);
}
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Exit(NetEventSource.ComponentType.Socket, "DNS", "GetHostEntry", ipHostEntry);
}
return(ipHostEntry);
}
public static IPHostEntry GetHostEntry(string hostNameOrAddress)
{
NameResolutionPal.EnsureSocketsAreInitialized();
if (hostNameOrAddress is null)
{
throw new ArgumentNullException(nameof(hostNameOrAddress));
}
// See if it's an IP Address.
IPHostEntry ipHostEntry;
if (IPAddress.TryParse(hostNameOrAddress, out IPAddress? address))
{
if (address.Equals(IPAddress.Any) || address.Equals(IPAddress.IPv6Any))
{
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Error(address, $"Invalid address '{address}'");
}
throw new ArgumentException(SR.Format(SR.net_invalid_ip_addr, nameof(hostNameOrAddress)));
}
ipHostEntry = GetHostEntryCore(address);
}
else
{
ipHostEntry = GetHostEntryCore(hostNameOrAddress);
}
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Info(hostNameOrAddress, $"{ipHostEntry} with {ipHostEntry.AddressList.Length} entries");
}
return(ipHostEntry);
}
public static IPHostEntry GetHostEntry(string hostNameOrAddress)
{
if (NetEventSource.IsEnabled)
{
NetEventSource.Enter(null, hostNameOrAddress);
}
NameResolutionPal.EnsureSocketsAreInitialized();
if (hostNameOrAddress is null)
{
throw new ArgumentNullException(nameof(hostNameOrAddress));
}
// See if it's an IP Address.
IPHostEntry ipHostEntry;
if (IPAddress.TryParse(hostNameOrAddress, out IPAddress address))
{
if (address.Equals(IPAddress.Any) || address.Equals(IPAddress.IPv6Any))
{
throw new ArgumentException(SR.Format(SR.net_invalid_ip_addr, nameof(hostNameOrAddress)));
}
ipHostEntry = GetHostEntryCore(address);
}
else
{
ipHostEntry = GetHostEntryCore(hostNameOrAddress);
}
if (NetEventSource.IsEnabled)
{
NetEventSource.Exit(null, ipHostEntry);
}
return(ipHostEntry);
}
internal static IPHostEntry InternalGetHostByName(string hostName, bool includeIPv6)
{
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Enter(NetEventSource.ComponentType.Socket, "DNS", "GetHostByName", hostName);
}
IPHostEntry ipHostEntry = null;
if (GlobalLog.IsEnabled)
{
GlobalLog.Print("Dns.GetHostByName: " + hostName);
}
NameResolutionPal.EnsureSocketsAreInitialized();
if (hostName.Length > MaxHostName || // If 255 chars, the last one must be a dot.
hostName.Length == MaxHostName && hostName[MaxHostName - 1] != '.')
{
throw new ArgumentOutOfRangeException(nameof(hostName), SR.Format(SR.net_toolong,
"hostName", MaxHostName.ToString(NumberFormatInfo.CurrentInfo)));
}
//
// IPv6 Changes: IPv6 requires the use of getaddrinfo() rather
// than the traditional IPv4 gethostbyaddr() / gethostbyname().
// getaddrinfo() is also protocol independent in that it will also
// resolve IPv4 names / addresses. As a result, it is the preferred
// resolution mechanism on platforms that support it (Windows 5.1+).
// If getaddrinfo() is unsupported, IPv6 resolution does not work.
//
// Consider : If IPv6 is disabled, we could detect IPv6 addresses
// and throw an unsupported platform exception.
//
// Note : Whilst getaddrinfo is available on WinXP+, we only
// use it if IPv6 is enabled (platform is part of that
// decision). This is done to minimize the number of
// possible tests that are needed.
//
if (includeIPv6 || SocketProtocolSupportPal.OSSupportsIPv6)
{
//
// IPv6 enabled: use getaddrinfo() to obtain DNS information.
//
int nativeErrorCode;
SocketError errorCode = NameResolutionPal.TryGetAddrInfo(hostName, out ipHostEntry, out nativeErrorCode);
if (errorCode != SocketError.Success)
{
throw new InternalSocketException(errorCode, nativeErrorCode);
}
}
else
{
ipHostEntry = NameResolutionPal.GetHostByName(hostName);
}
if (NetEventSource.Log.IsEnabled())
{
NetEventSource.Exit(NetEventSource.ComponentType.Socket, "DNS", "GetHostByName", ipHostEntry);
}
return(ipHostEntry);
} // GetHostByName
