add SendTo/ReceiveFrom with SocketAddress

src/libraries/Common/src/Interop/Unix/System.Native/Interop.Socket.cs

@@ -3,7 +3,6 @@
 
 using System;
 using System.Net;
-using System.Net.Internals;
 using System.Net.Sockets;
 using System.Runtime.InteropServices;
 
@@ -12,6 +11,6 @@ internal static partial class Interop
     internal static partial class Sys
     {
         [LibraryImport(Libraries.SystemNative, EntryPoint = "SystemNative_Socket")]
-        internal static unsafe partial Error Socket(AddressFamily addressFamily, SocketType socketType, ProtocolType protocolType, IntPtr* socket);
+        internal static unsafe partial Error Socket(int addressFamily, int socketType, int protocolType, IntPtr* socket);
     }
 }

src/libraries/Common/src/Interop/Unix/System.Native/Interop.SocketAddress.cs

@@ -9,9 +9,9 @@ internal static partial class Interop
 {
     internal static partial class Sys
     {
-        [LibraryImport(Libraries.SystemNative, EntryPoint = "SystemNative_GetIPSocketAddressSizes")]
+        [LibraryImport(Libraries.SystemNative, EntryPoint = "SystemNative_GetSocketAddressSizes")]
         [SuppressGCTransition]
-        internal static unsafe partial Error GetIPSocketAddressSizes(int* ipv4SocketAddressSize, int* ipv6SocketAddressSize);
+        internal static unsafe partial Error GetSocketAddressSizes(int* ipv4SocketAddressSize, int* ipv6SocketAddressSize, int* udsSocketAddressSize, int* maxSocketAddressSize);
 
         [LibraryImport(Libraries.SystemNative, EntryPoint = "SystemNative_GetAddressFamily")]
         [SuppressGCTransition]

src/libraries/Common/src/Interop/Windows/IpHlpApi/Interop.ICMP.cs

@@ -104,6 +104,6 @@ internal static partial uint IcmpSendEcho2(SafeCloseIcmpHandle icmpHandle, SafeW
 
         [LibraryImport(Interop.Libraries.IpHlpApi, SetLastError = true)]
         internal static unsafe partial uint Icmp6SendEcho2(SafeCloseIcmpHandle icmpHandle, SafeWaitHandle Event, IntPtr apcRoutine, IntPtr apcContext,
-            byte* sourceSocketAddress, byte[] destSocketAddress, SafeLocalAllocHandle data, ushort dataSize, ref IP_OPTION_INFORMATION options, SafeLocalAllocHandle replyBuffer, uint replySize, uint timeout);
+            Span<byte> sourceSocketAddress, Span<byte> destSocketAddress, SafeLocalAllocHandle data, ushort dataSize, ref IP_OPTION_INFORMATION options, SafeLocalAllocHandle replyBuffer, uint replySize, uint timeout);
     }
 }

src/libraries/Common/src/Interop/Windows/IpHlpApi/Interop.NetworkInformation.cs

@@ -8,7 +8,6 @@
 using System.Net.NetworkInformation;
 using System.Net.Sockets;
 using System.Runtime.InteropServices;
-using Internals = System.Net.Internals;
 
 internal static partial class Interop
 {
@@ -53,20 +52,14 @@ internal enum GetAdaptersAddressesFlags
         }
 
         [StructLayout(LayoutKind.Sequential)]
-        internal struct IpSocketAddress
+        internal unsafe struct IpSocketAddress
         {
             internal IntPtr address;
             internal int addressLength;
 
             internal IPAddress MarshalIPAddress()
             {
-                // Determine the address family used to create the IPAddress.
-                AddressFamily family = (addressLength > Internals.SocketAddress.IPv4AddressSize)
-                    ? AddressFamily.InterNetworkV6 : AddressFamily.InterNetwork;
-                Internals.SocketAddress sockAddress = new Internals.SocketAddress(family, addressLength);
-                Marshal.Copy(address, sockAddress.Buffer, 0, addressLength);
-
-                return sockAddress.GetIPAddress();
+                return IPEndPointExtensions.GetIPAddress(new Span<byte>((void*)address, addressLength));
             }
         }
 
@@ -511,7 +504,7 @@ internal static unsafe partial uint GetAdaptersAddresses(
             uint* outBufLen);
 
         [LibraryImport(Interop.Libraries.IpHlpApi)]
-        internal static unsafe partial uint GetBestInterfaceEx(byte* ipAddress, int* index);
+        internal static unsafe partial uint GetBestInterfaceEx(Span<byte> ipAddress, int* index);
 
         [LibraryImport(Interop.Libraries.IpHlpApi)]
         internal static partial uint GetIfEntry2(ref MibIfRow2 pIfRow);

src/libraries/Common/src/Interop/Windows/WinSock/Interop.WSAConnect.cs

@@ -10,13 +10,22 @@ internal static partial class Interop
     internal static partial class Winsock
     {
         [LibraryImport(Interop.Libraries.Ws2_32, SetLastError = true)]
-        internal static partial SocketError WSAConnect(
+        private static partial SocketError WSAConnect(
             SafeSocketHandle socketHandle,
-            byte[] socketAddress,
+            ReadOnlySpan<byte> socketAddress,
             int socketAddressSize,
             IntPtr inBuffer,
             IntPtr outBuffer,
             IntPtr sQOS,
             IntPtr gQOS);
+
+        internal static SocketError WSAConnect(
+            SafeSocketHandle socketHandle,
+            ReadOnlySpan<byte> socketAddress,
+            IntPtr inBuffer,
+            IntPtr outBuffer,
+            IntPtr sQOS,
+            IntPtr gQOS) =>
+            WSAConnect(socketHandle, socketAddress, socketAddress.Length, inBuffer, outBuffer, sQOS, gQOS);
     }
 }

src/libraries/Common/src/Interop/Windows/WinSock/Interop.accept.cs

@@ -12,7 +12,7 @@ internal static partial class Winsock
         [LibraryImport(Interop.Libraries.Ws2_32, SetLastError = true)]
         internal static partial IntPtr accept(
             SafeSocketHandle socketHandle,
-            byte[] socketAddress,
+            Span<byte> socketAddress,
             ref int socketAddressSize);
     }
 }

src/libraries/Common/src/Interop/Windows/WinSock/Interop.recvfrom.cs

@@ -13,10 +13,10 @@ internal static partial class Winsock
         [LibraryImport(Interop.Libraries.Ws2_32, SetLastError = true)]
         internal static unsafe partial int recvfrom(
             SafeSocketHandle socketHandle,
-            byte* pinnedBuffer,
+            Span<byte> pinnedBuffer,
             int len,
             SocketFlags socketFlags,
-            byte[] socketAddress,
+            Span<byte> socketAddress,
             ref int socketAddressSize);
     }
 }

src/libraries/Common/src/Interop/Windows/WinSock/Interop.sendto.cs

@@ -15,7 +15,7 @@ internal static unsafe partial int sendto(
             byte* pinnedBuffer,
             int len,
             SocketFlags socketFlags,
-            byte[] socketAddress,
+            ReadOnlySpan<byte> socketAddress,
             int socketAddressSize);
     }
 }

src/libraries/Common/src/System/Net/IPEndPointExtensions.cs

@@ -0,0 +1,62 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics;
+using System.Net;
+
+namespace System.Net.Sockets
+{
+    internal static class IPEndPointExtensions
+    {
+        public static IPAddress GetIPAddress(ReadOnlySpan<byte> socketAddressBuffer)
+        {
+            AddressFamily  family = SocketAddressPal.GetAddressFamily(socketAddressBuffer);
+
+            if (family == AddressFamily.InterNetworkV6)
+            {
+                Span<byte> address = stackalloc byte[IPAddressParserStatics.IPv6AddressBytes];
+                uint scope;
+                SocketAddressPal.GetIPv6Address(socketAddressBuffer, address, out scope);
+                return new IPAddress(address, (long)scope);
+            }
+            else if (family == AddressFamily.InterNetwork)
+            {
+                return new IPAddress((long)SocketAddressPal.GetIPv4Address(socketAddressBuffer) & 0x0FFFFFFFF);
+            }
+
+            throw new SocketException((int)SocketError.AddressFamilyNotSupported);
+        }
+
+        public static void SetIPAddress(Span<byte> socketAddressBuffer, IPAddress address)
+        {
+            SocketAddressPal.SetAddressFamily(socketAddressBuffer, address.AddressFamily);
+            SocketAddressPal.SetPort(socketAddressBuffer, 0);
+            if (address.AddressFamily == AddressFamily.InterNetwork)
+            {
+#pragma warning disable CS0618
+                SocketAddressPal.SetIPv4Address(socketAddressBuffer, (uint)address.Address);
+#pragma warning restore CS0618
+            }
+            else
+            {
+                Span<byte> addressBuffer = stackalloc byte[IPAddressParserStatics.IPv6AddressBytes];
+                address.TryWriteBytes(addressBuffer, out int written);
+                Debug.Assert(written == IPAddressParserStatics.IPv6AddressBytes);
+                SocketAddressPal.SetIPv6Address(socketAddressBuffer, addressBuffer, (uint)address.ScopeId);
+            }
+        }
+
+        public static IPEndPoint CreateIPEndPoint(ReadOnlySpan<byte> socketAddressBuffer)
+        {
+           return new IPEndPoint(GetIPAddress(socketAddressBuffer), SocketAddressPal.GetPort(socketAddressBuffer));
+        }
+
+        // suggestion from https://github.com/dotnet/runtime/issues/78993
+        public static void Serialize(this IPEndPoint endPoint, Span<byte> destination)
+        {
+            SocketAddressPal.SetAddressFamily(destination, endPoint.AddressFamily);
+            SetIPAddress(destination, endPoint.Address);
+            SocketAddressPal.SetPort(destination, (ushort)endPoint.Port);
+        }
+    }
+}