Merge pull request #2890 from CIPop/NameResolutionPR

Porting System.Net.NameResolution.

Author: CIPop

src/Common/src/Interop/Linux/libc/Interop.gethostbyaddr_r.cs

@@ -0,0 +1,16 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+using System.Runtime.InteropServices;
+
+using socklen_t = System.UInt32;
+
+internal static partial class Interop
+{
+    internal static partial class libc
+    {
+        [DllImport(Libraries.Libc, SetLastError = true, CharSet = CharSet.Ansi)]
+        public static extern unsafe int gethostbyaddr_r(void* addr, socklen_t len, int type, hostent* ret, byte* buf, IntPtr buflen, hostent** result, int* h_errnop);
+    }
+}

src/Common/src/Interop/Linux/libc/Interop.gethostbyname_r.cs

@@ -0,0 +1,14 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class libc
+    {
+        [DllImport(Libraries.Libc, SetLastError = true, CharSet = CharSet.Ansi)]
+        public static extern unsafe int gethostbyname_r(string name, hostent* ret, byte* buf, IntPtr buflen, hostent** result, int* h_errnop);
+    }
+}

src/Common/src/Interop/OSX/libc/Interop.addrinfo.cs

@@ -11,12 +11,18 @@ internal static partial class Interop
 {
     internal static partial class libc
     {
+        public const int AI_CANONNAME = 0x0002;   // Request for canonical name.
         public const int AI_NUMERICHOST = 0x0004; // Don't use name resolution.
         public const int AI_NUMERICSERV = 0x1000; // Don't use name resolution.
 
+        public const int NI_MAXHOST = 1025;
         public const int NI_NUMERICHOST = 2; // Don't try to look up hostname.
+        public const int NI_NAMEREQD = 4;    // Don't return numeric addresses.
 
+        public const int EAI_AGAIN = 2;    // Temporary failure in name resolution.
         public const int EAI_BADFLAGS = 3; // Invalid value for `ai_flags' field.
+        public const int EAI_FAIL = 4;     // Non-recoverable failure in name resolution.
+        public const int EAI_FAMILY = 5;   // 'ai_family' not supported.
         public const int EAI_NONAME = 8;   // NAME or SERVICE is unknown.
 
         public unsafe struct addrinfo

src/Common/src/Interop/OSX/libc/Interop.gethostbyaddr.cs

@@ -0,0 +1,16 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+using System.Runtime.InteropServices;
+
+using socklen_t = System.UInt32;
+
+internal static partial class Interop
+{
+    internal static partial class libc
+    {
+        [DllImport(Libraries.Libc, SetLastError = true, CharSet = CharSet.Ansi)]
+        public static extern unsafe hostent* gethostbyaddr(void* addr, socklen_t len, int type);
+    }
+}

src/Common/src/Interop/OSX/libc/Interop.gethostbyname.cs

@@ -0,0 +1,14 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class libc
+    {
+        [DllImport(Libraries.Libc, SetLastError = true, CharSet = CharSet.Ansi)]
+        public static extern unsafe hostent* gethostbyname(string name);
+    }
+}

src/Common/src/Interop/OSX/libc/Interop.sockaddr.cs

@@ -17,16 +17,17 @@ internal static partial class libc
         public const sa_family_t AF_INET = 2;   // IP protocol family.
         public const sa_family_t AF_INET6 = 30; // IP version 6.
 
+        // Disable CS0169 (The field 'Interop.libc.sockaddr_in.padding' is never used) and CS0649
+        // (Field 'Interop.libc.sockaddr.sa_family' is never assigned to, and will always have its
+        // default value 0)
+#pragma warning disable 169, 649
+
         // NOTE: this type is incomplete, and its values should never be used directly.
         // Specific sockaddr types (e.g. sockaddr_in or sockaddr_in6) should be used instead.
         public unsafe struct sockaddr
         {
-            // Disable CS0649: Field 'Interop.libc.sockaddr.sa_family' is never assigned to,
-            // and will always have its default value 0
-#pragma warning disable 649
             public byte sa_len;
             public sa_family_t sa_family;
-#pragma warning restore 649
         }
 
         public struct in_addr
@@ -42,7 +43,7 @@ public struct sockaddr_in
             public sa_family_t sin_family; // Address family: AF_INET
             public in_port_t sin_port;     // Port in network byte order
             public in_addr sin_addr;       // Internet address
-            private ulong padding;         // 8 bytes of padding
+            private ulong padding;        // 8 bytes of padding
         }
 
         public unsafe struct in6_addr
@@ -61,5 +62,7 @@ public struct sockaddr_in6
             public in6_addr sin6_addr;      // IPv6 address
             public uint sin6_scope_id;      // Scope ID
         }
+
+#pragma warning restore 169, 649
     }
 }

src/Common/src/Interop/Unix/libc/Interop.addrinfo.cs

@@ -11,13 +11,19 @@ internal static partial class Interop
 {
     internal static partial class libc
     {
+        public const int AI_CANONNAME = 0x0002;   // Request for canonical name.
         public const int AI_NUMERICHOST = 0x0004; // Don't use name resolution.
         public const int AI_NUMERICSERV = 0x0400; // Don't use name resolution.
 
+        public const int NI_MAXHOST = 1025;
         public const int NI_NUMERICHOST = 1; // Don't try to look up hostname.
+        public const int NI_NAMEREQD = 8;    // Don't return numeric addresses.
 
         public const int EAI_BADFLAGS = -1; // Invalid value for `ai_flags' field.
         public const int EAI_NONAME = -2;   // NAME or SERVICE is unknown.
+        public const int EAI_AGAIN = -3;    // Temporary failure in name resolution.
+        public const int EAI_FAIL = -4;     // Non-recoverable failure in name resolution.
+        public const int EAI_FAMILY = -5;   // 'ai_family' not supported.
 
         public unsafe struct addrinfo
         {

src/Common/src/Interop/Unix/libc/Interop.hostent.cs

@@ -0,0 +1,30 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+
+internal static partial class Interop
+{
+    internal static partial class libc
+    {
+        public const int HOST_NOT_FOUND = 1;
+        public const int TRY_AGAIN = 2;
+        public const int NO_RECOVERY = 3;
+        public const int NO_DATA = 4;
+        public const int NO_ADDRESS = NO_DATA;
+
+        // Disable CS0169 (The field 'Interop.libc.hostent.h_length' is never used) and CS0649
+        // (Field 'Interop.libc.hostent.sa_family' is never assigned to, and will always have its
+        // default value 0)
+#pragma warning disable 169, 649
+        public unsafe struct hostent
+        {
+            public byte* h_name;       // Official bane of host
+            public byte** h_aliases;   // Alias list
+            public int h_addrtype;     // Host address type
+            public int h_length;       // Length of address
+            public byte** h_addr_list; // List of addresses from name server
+        }
+#pragma warning restore 169, 649
+    }
+}

src/Common/src/Interop/Unix/libc/Interop.sockaddr.cs

@@ -17,15 +17,16 @@ internal static partial class libc
         public const sa_family_t AF_INET = 2;   // IP protocol family.
         public const sa_family_t AF_INET6 = 10; // IP version 6.
 
+        // Disable CS0169 (The field 'Interop.libc.sockaddr_in.padding' is never used) and CS0649
+        // (Field 'Interop.libc.sockaddr.sa_family' is never assigned to, and will always have its
+        // default value 0)
+#pragma warning disable 169, 649
+
         // NOTE: this type is incomplete, and its values should never be used directly.
         // Specific sockaddr types (e.g. sockaddr_in or sockaddr_in6) should be used instead.
         public unsafe struct sockaddr
         {
-            // Disable CS0649: Field 'Interop.libc.sockaddr.sa_family' is never assigned to,
-            // and will always have its default value 0
-#pragma warning disable 649
             public sa_family_t sa_family;
-#pragma warning restore 649
         }
 
         public struct in_addr
@@ -58,5 +59,7 @@ public struct sockaddr_in6
             public in6_addr sin6_addr;      // IPv6 address
             public uint sin6_scope_id;      // Scope ID
         }
+
+#pragma warning restore 169, 649
     }
 }

src/Common/src/Interop/Unix/libc/Interop.socket.cs

@@ -0,0 +1,16 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class libc
+    {
+        public const int SOCK_DGRAM = 2;
+
+        [DllImport(Libraries.Libc, SetLastError = true)]
+        internal static extern int socket(int domain, int type, int protocol);
+    }
+}