mcs/class/Mono.Posix/Test/Mono.Unix.Native/SocketTest.cs

   1 //
   2 // socket-related test cases
   3 //
   4 // Authors:
   5 //  Steffen Kiess (s-kiess@web.de)
   6 //
   7 // Copyright (C) 2015 Steffen Kiess
   8 //
   9
  10 using System;
  11 using System.IO;
  12 using System.Net;
  13 using System.Net.Sockets;
  14 using System.Runtime.InteropServices;
  15
  16 using Mono.Unix;
  17 using Mono.Unix.Native;
  18
  19 using NUnit.Framework;
  20
  21 namespace MonoTests.Mono.Unix.Native
  22 {
  23         [TestFixture, Category ("NotDotNet")]
  24         public class SocketTest {
  25
  26                 string TempFolder;
  27
  28                 [SetUp]
  29                 public void SetUp ()
  30                 {
  31                         TempFolder = Path.Combine (Path.GetTempPath (), this.GetType ().FullName);
  32
  33                         if (Directory.Exists (TempFolder))
  34                                 Directory.Delete (TempFolder, true);
  35
  36                         Directory.CreateDirectory (TempFolder);
  37                 }
  38
  39                 [TearDown]
  40                 public void TearDown()
  41                 {
  42                         if (Directory.Exists (TempFolder))
  43                                 Directory.Delete (TempFolder, true);
  44                 }
  45
  46                 // Set a timeout on all sockets to make sure that if a test fails it
  47                 // won't cause the program to hang
  48                 void SetTimeout (int socket)
  49                 {
  50                         var timeout = new Timeval {
  51                                 tv_sec = 0,
  52                                 tv_usec = 500000,
  53                         };
  54                         if (Syscall.setsockopt (socket, UnixSocketProtocol.SOL_SOCKET, UnixSocketOptionName.SO_RCVTIMEO, timeout) < 0 ||
  55                                         Syscall.setsockopt (socket, UnixSocketProtocol.SOL_SOCKET, UnixSocketOptionName.SO_SNDTIMEO, timeout) < 0)
  56                                 UnixMarshal.ThrowExceptionForLastError ();
  57                 }
  58
  59                 void WithSocketPair (Action<int, int> f)
  60                 {
  61                         int socket1, socket2;
  62                         if (Syscall.socketpair (UnixAddressFamily.AF_UNIX, UnixSocketType.SOCK_STREAM, 0, out socket1, out socket2) < 0)
  63                                 UnixMarshal.ThrowExceptionForLastError ();
  64                         try {
  65                                 SetTimeout (socket1);
  66                                 SetTimeout (socket2);
  67
  68                                 f (socket1, socket2);
  69                         } finally {
  70                                 int r0 = Syscall.close (socket1);
  71                                 int r1 = Syscall.close (socket2);
  72                                 if (r0 < 0 || r1 < 0)
  73                                         UnixMarshal.ThrowExceptionForLastError ();
  74                         }
  75                 }
  76
  77                 void WithSockets (UnixAddressFamily af, UnixSocketType type, UnixSocketProtocol protocol, Action<int, int> f)
  78                 {
  79                         int so1, so2;
  80                         if ((so1 = Syscall.socket (af, type, protocol)) < 0)
  81                                 UnixMarshal.ThrowExceptionForLastError ();
  82                         try {
  83                                 if ((so2 = Syscall.socket (af, type, protocol)) < 0)
  84                                         UnixMarshal.ThrowExceptionForLastError ();
  85                                 try {
  86                                         SetTimeout (so1);
  87                                         SetTimeout (so2);
  88
  89                                         f (so1, so2);
  90                                 } finally {
  91                                         if (Syscall.close (so2) < 0)
  92                                                 UnixMarshal.ThrowExceptionForLastError ();
  93                                 }
  94                         } finally {
  95                                 if (Syscall.close (so1) < 0)
  96                                         UnixMarshal.ThrowExceptionForLastError ();
  97                         }
  98                 }
  99
 100                 [Test]
 101                 public void TestSocket ()
 102                 {
 103                         int socket;
 104                         if ((socket = Syscall.socket (UnixAddressFamily.AF_UNIX, UnixSocketType.SOCK_STREAM, 0)) < 0)
 105                                 UnixMarshal.ThrowExceptionForLastError ();
 106
 107                         if (Syscall.close (socket) < 0)
 108                                 UnixMarshal.ThrowExceptionForLastError ();
 109                 }
 110
 111                 [Test]
 112                 public void SocketPair ()
 113                 {
 114                         int socket1, socket2;
 115                         if (Syscall.socketpair (UnixAddressFamily.AF_UNIX, UnixSocketType.SOCK_STREAM, 0, out socket1, out socket2) < 0)
 116                                 UnixMarshal.ThrowExceptionForLastError ();
 117
 118                         int r0 = Syscall.close (socket1);
 119                         int r1 = Syscall.close (socket2);
 120                         if (r0 < 0 || r1 < 0)
 121                                 UnixMarshal.ThrowExceptionForLastError ();
 122                 }
 123
 124                 [Test]
 125                 public void SendRecv ()
 126                 {
 127                         WithSocketPair ((so1, so2) => {
 128                                 long ret;
 129                                 var buffer1 = new byte[] { 42, 43, 44 };
 130                                 ret = Syscall.send (so1, buffer1, (ulong) buffer1.Length, 0);
 131                                 if (ret < 0)
 132                                         UnixMarshal.ThrowExceptionForLastError ();
 133
 134                                 var buffer2 = new byte[1024];
 135                                 ret = Syscall.recv (so2, buffer2, (ulong) buffer2.Length, 0);
 136                                 if (ret < 0)
 137                                         UnixMarshal.ThrowExceptionForLastError ();
 138
 139                                 Assert.AreEqual (buffer1.Length, ret);
 140                                 for (int i = 0; i < buffer1.Length; i++)
 141                                         Assert.AreEqual (buffer1[i], buffer2[i]);
 142                         });
 143                 }
 144
 145                 [Test]
 146                 public void SockOpt ()
 147                 {
 148                         WithSockets (UnixAddressFamily.AF_UNIX, UnixSocketType.SOCK_STREAM, 0, (so1, so2) => {
 149                                 int value;
 150                                 if (Syscall.getsockopt (so1, UnixSocketProtocol.SOL_SOCKET, UnixSocketOptionName.SO_REUSEADDR, out value) < 0)
 151                                         UnixMarshal.ThrowExceptionForLastError ();
 152                                 Assert.AreEqual (0, value);
 153
 154                                 // Set SO_REUSEADDR to 1
 155                                 if (Syscall.setsockopt (so1, UnixSocketProtocol.SOL_SOCKET, UnixSocketOptionName.SO_REUSEADDR, 1) < 0)
 156                                         UnixMarshal.ThrowExceptionForLastError ();
 157
 158                                 // Get and check SO_REUSEADDR
 159                                 if (Syscall.getsockopt (so1, UnixSocketProtocol.SOL_SOCKET, UnixSocketOptionName.SO_REUSEADDR, out value) < 0)
 160                                         UnixMarshal.ThrowExceptionForLastError ();
 161                                 Assert.AreNotEqual (0, value);
 162
 163                                 // Set SO_REUSEADDR to 0
 164                                 if (Syscall.setsockopt (so1, UnixSocketProtocol.SOL_SOCKET, UnixSocketOptionName.SO_REUSEADDR, new byte[10], 4) < 0)
 165                                         UnixMarshal.ThrowExceptionForLastError ();
 166
 167                                 // Get and check SO_REUSEADDR
 168                                 var buffer = new byte[15];
 169                                 long size = 12;
 170                                 if (Syscall.getsockopt (so1, UnixSocketProtocol.SOL_SOCKET, UnixSocketOptionName.SO_REUSEADDR, buffer, ref size) < 0)
 171                                         UnixMarshal.ThrowExceptionForLastError ();
 172                                 Assert.AreEqual (size, 4);
 173                                 for (int i = 0; i < size; i++)
 174                                         Assert.AreEqual (buffer[i], 0);
 175                         });
 176                 }
 177
 178                 [Test]
 179                 public void SockOptLinger ()
 180                 {
 181                         WithSockets (UnixAddressFamily.AF_INET, UnixSocketType.SOCK_STREAM, UnixSocketProtocol.IPPROTO_TCP, (so1, so2) => {
 182                                 Linger linger = new Linger {
 183                                         l_onoff = 1,
 184                                         l_linger = 42,
 185                                 };
 186                                 // Set SO_LINGER
 187                                 if (Syscall.setsockopt (so1, UnixSocketProtocol.SOL_SOCKET, UnixSocketOptionName.SO_LINGER, linger) < 0)
 188                                         UnixMarshal.ThrowExceptionForLastError ();
 189
 190                                 // Get and check SO_LINGER
 191                                 Linger value;
 192                                 if (Syscall.getsockopt (so1, UnixSocketProtocol.SOL_SOCKET, UnixSocketOptionName.SO_LINGER, out value) < 0)
 193                                         UnixMarshal.ThrowExceptionForLastError ();
 194                                 if (value.l_onoff == 0)
 195                                         Assert.Fail ("Linger not enabled");
 196                                 Assert.AreEqual (linger.l_linger, value.l_linger);
 197                         });
 198                 }
 199
 200                 [Test]
 201                 public void Shutdown ()
 202                 {
 203                         WithSocketPair ((so1, so2) => {
 204                                 if (Syscall.shutdown (so1, ShutdownOption.SHUT_WR) < 0)
 205                                         UnixMarshal.ThrowExceptionForLastError ();
 206
 207                                 var buffer2 = new byte[1024];
 208                                 long ret = Syscall.recv (so2, buffer2, (ulong) buffer2.Length, 0);
 209                                 if (ret < 0)
 210                                         UnixMarshal.ThrowExceptionForLastError ();
 211
 212                                 Assert.AreEqual (ret, 0);
 213                         });
 214                 }
 215
 216                 [Test]
 217                 public unsafe void ByteOrder ()
 218                 {
 219                         ushort val1 = Syscall.htons (0x1234);
 220                         byte* ptr1 = (byte*) &val1;
 221                         Assert.AreEqual (ptr1[0], 0x12);
 222                         Assert.AreEqual (ptr1[1], 0x34);
 223
 224                         uint val2 = Syscall.htonl (0x6789abcd);
 225                         byte* ptr2 = (byte*) &val2;
 226                         Assert.AreEqual (ptr2[0], 0x67);
 227                         Assert.AreEqual (ptr2[1], 0x89);
 228                         Assert.AreEqual (ptr2[2], 0xab);
 229                         Assert.AreEqual (ptr2[3], 0xcd);
 230
 231                         ptr1[0] = 0xfe;
 232                         ptr1[1] = 0xdc;
 233                         Assert.AreEqual (Syscall.ntohs (val1), 0xfedc);
 234
 235                         ptr2[0] = 0x76;
 236                         ptr2[1] = 0x54;
 237                         ptr2[2] = 0x32;
 238                         ptr2[3] = 0x10;
 239                         Assert.AreEqual (Syscall.ntohl (val2), 0x76543210);
 240                 }
 241
 242                 [Test]
 243                 public void InAddr ()
 244                 {
 245                         var ip = IPAddress.Loopback;
 246                         var inAddr = NativeConvert.ToInAddr (ip);
 247                         Assert.AreEqual (ip, NativeConvert.ToIPAddress (inAddr));
 248                         Assert.AreEqual (0x7f000001, Syscall.ntohl (inAddr.s_addr));
 249
 250                         Assert.AreEqual ("127.0.0.1", inAddr.ToString ());
 251                 }
 252
 253                 [Test]
 254                 public void In6Addr ()
 255                 {
 256                         if (!Socket.OSSupportsIPv6)
 257                                 Assert.Ignore ("OS does not support IPv6.");
 258
 259                         var ip6 = IPAddress.IPv6Loopback;
 260                         var in6Addr = NativeConvert.ToIn6Addr (ip6);
 261                         Assert.AreEqual (ip6, NativeConvert.ToIPAddress (in6Addr));
 262                         Assert.AreEqual (1, in6Addr[15]);
 263
 264                         Assert.AreEqual ("::1", in6Addr.ToString ());
 265                 }
 266
 267                 [Test]
 268                 public void SockaddrUnTest ()
 269                 {
 270                         var address1 = new SockaddrUn ("/tmp/foo");
 271                         Assert.AreEqual (address1.Path, "/tmp/foo");
 272                         Assert.IsFalse (address1.IsLinuxAbstractNamespace);
 273
 274                         var storage = address1.ToSockaddrStorage ();
 275                         var address2 = SockaddrUn.FromSockaddrStorage (storage);
 276                         Assert.AreEqual (address1, address2);
 277
 278                         var sockaddr = Sockaddr.FromSockaddrStorage (storage);
 279                         Assert.AreEqual (sockaddr.sa_family, address1.sa_family);
 280
 281                         var address3 = new SockaddrUn ("/tmp/bar", linuxAbstractNamespace:true);
 282                         Assert.AreEqual (address3.Path, "/tmp/bar");
 283                         Assert.IsTrue (address3.IsLinuxAbstractNamespace);
 284
 285                         var address4 = new SockaddrUn (new string ('X', 9000));
 286                         Assert.AreEqual (address4.Path, new string ('X', 9000));
 287                         Assert.IsFalse (address4.IsLinuxAbstractNamespace);
 288                         var storage2 = address4.ToSockaddrStorage ();
 289                         var address5 = SockaddrUn.FromSockaddrStorage (storage2);
 290                         Assert.AreEqual (address4, address5);
 291                         // Test the malloc() path for long SockaddrUn adresses (the syscalls will fail because the fd is invalid and because the path is too long)
 292                         Syscall.bind (-1, address4);
 293                         Syscall.getsockname (-1, address4);
 294
 295                         Assert.AreEqual ("{sa_family=AF_UNIX, sun_path=\"/tmp/foo\"}", address1.ToString ());
 296                         Assert.AreEqual ("{sa_family=AF_UNIX, sun_path=\"\\0/tmp/bar\"}", address3.ToString ());
 297                 }
 298
 299                 [Test]
 300                 public void SockaddrInTest ()
 301                 {
 302                         var address1 = new SockaddrIn {
 303                                 sin_family = UnixAddressFamily.AF_INET,
 304                                 sin_port = Syscall.htons (5678),
 305                                 sin_addr = NativeConvert.ToInAddr (IPAddress.Loopback),
 306                         };
 307
 308                         var storage = address1.ToSockaddrStorage ();
 309                         var address2 = SockaddrIn.FromSockaddrStorage (storage);
 310                         Assert.AreEqual (address1, address2);
 311
 312                         var sockaddr = Sockaddr.FromSockaddrStorage (storage);
 313                         Assert.AreEqual (sockaddr.sa_family, address1.sa_family);
 314
 315                         var storage2 = storage.ToSockaddrStorage ();
 316                         Assert.AreEqual (storage, storage2);
 317
 318                         var storage3 = new SockaddrStorage (123);
 319                         storage2.CopyTo (storage3);
 320                         Assert.AreEqual (storage, storage3);
 321
 322                         Assert.AreEqual ("{sin_family=AF_INET, sin_port=htons(5678), sin_addr=127.0.0.1}", address1.ToString ());
 323                 }
 324
 325                 [Test]
 326                 public void SockaddrIn6Test ()
 327                 {
 328                         if (!Socket.OSSupportsIPv6)
 329                                 Assert.Ignore ("OS does not support IPv6.");
 330
 331                         var address1 = new SockaddrIn6 {
 332                                 sin6_family = UnixAddressFamily.AF_INET6,
 333                                 sin6_port = Syscall.htons (1234),
 334                                 sin6_flowinfo = 2,
 335                                 sin6_addr = NativeConvert.ToIn6Addr (IPAddress.IPv6Loopback),
 336                                 sin6_scope_id = 3
 337                         };
 338
 339                         var storage = address1.ToSockaddrStorage ();
 340                         var address2 = SockaddrIn6.FromSockaddrStorage (storage);
 341                         Assert.AreEqual (address1, address2);
 342
 343                         var sockaddr = Sockaddr.FromSockaddrStorage (storage);
 344                         Assert.AreEqual (sockaddr.sa_family, address1.sa_family);
 345
 346                         Assert.AreEqual ("{sin6_family=AF_INET6, sin6_port=htons(1234), sin6_flowinfo=2, sin6_addr=::1, sin6_scope_id=3}", address1.ToString ());
 347                 }
 348
 349                 [Test]
 350                 public void BindConnect ()
 351                 {
 352                         WithSockets (UnixAddressFamily.AF_INET, UnixSocketType.SOCK_DGRAM, UnixSocketProtocol.IPPROTO_UDP, (so1, so2) => {
 353                                 // Bind UDP socket so1 to 127.0.0.1 with dynamic port
 354                                 var address = new SockaddrIn {
 355                                         sin_family = UnixAddressFamily.AF_INET,
 356                                         sin_port = Syscall.htons (0),
 357                                         sin_addr = new InAddr (127, 0, 0, 1),
 358                                 };
 359                                 if (Syscall.bind (so1, address) < 0)
 360                                         UnixMarshal.ThrowExceptionForLastError ();
 361
 362                                 // Get actual port number using getsockname()
 363                                 var actualAddress = new SockaddrIn ();
 364                                 if (Syscall.getsockname (so1, actualAddress) < 0)
 365                                         UnixMarshal.ThrowExceptionForLastError ();
 366                                 Assert.AreEqual (actualAddress.sa_family, UnixAddressFamily.AF_INET);
 367                                 var port = Syscall.ntohs (actualAddress.sin_port);
 368                                 Assert.IsTrue (port != 0);
 369
 370
 371                                 // Connect so2 to so1
 372                                 var remoteAddress = new SockaddrIn {
 373                                         sin_family = UnixAddressFamily.AF_INET,
 374                                         sin_port = Syscall.htons (port),
 375                                         sin_addr = new InAddr (127, 0, 0, 1),
 376                                 };
 377                                 if (Syscall.connect (so2, remoteAddress) < 0)
 378                                         UnixMarshal.ThrowExceptionForLastError ();
 379
 380                                 // Verify peer address using getpeername()
 381                                 var address2 = new SockaddrIn ();
 382                                 if (Syscall.getpeername (so2, address2) < 0)
 383                                         UnixMarshal.ThrowExceptionForLastError ();
 384                                 Assert.AreEqual (address2.sa_family, UnixAddressFamily.AF_INET);
 385                                 Assert.AreEqual (remoteAddress.sin_port, address2.sin_port);
 386                                 Assert.AreEqual (remoteAddress.sin_addr, address2.sin_addr);
 387
 388                                 // Send and receive a few bytes
 389                                 long ret;
 390                                 var buffer1 = new byte[] { 42, 43, 44 };
 391                                 ret = Syscall.send (so2, buffer1, (ulong) buffer1.Length, 0);
 392                                 if (ret < 0)
 393                                         UnixMarshal.ThrowExceptionForLastError ();
 394
 395                                 var buffer2 = new byte[1024];
 396                                 ret = Syscall.recv (so1, buffer2, (ulong) buffer2.Length, 0);
 397                                 if (ret < 0)
 398                                         UnixMarshal.ThrowExceptionForLastError ();
 399
 400                                 Assert.AreEqual (buffer1.Length, ret);
 401                                 for (int i = 0; i < buffer1.Length; i++)
 402                                         Assert.AreEqual (buffer1[i], buffer2[i]);
 403                         });
 404                 }
 405
 406                 [Test]
 407                 public void IPv6 ()
 408                 {
 409                         if (!Socket.OSSupportsIPv6)
 410                                 Assert.Ignore ("OS does not support IPv6.");
 411
 412                         var address = new SockaddrIn6 {
 413                                 sin6_family = UnixAddressFamily.AF_INET6,
 414                                 sin6_port = Syscall.htons (0),
 415                                 sin6_addr = NativeConvert.ToIn6Addr (IPAddress.IPv6Loopback),
 416                         };
 417                         WithSockets (UnixAddressFamily.AF_INET6, UnixSocketType.SOCK_STREAM, 0, (so1, so2) => {
 418                                 if (Syscall.bind (so1, address) < 0)
 419                                         UnixMarshal.ThrowExceptionForLastError ();
 420
 421                                 var address1Stor = new SockaddrStorage ();
 422                                 if (Syscall.getsockname (so1, address1Stor) < 0)
 423                                         UnixMarshal.ThrowExceptionForLastError ();
 424                                 var address1 = new SockaddrIn6 ();
 425                                 address1Stor.CopyTo (address1);
 426
 427                                 // Check getsockname(socket, null)
 428                                 if (Syscall.getsockname (so1, null) < 0)
 429                                         UnixMarshal.ThrowExceptionForLastError ();
 430
 431                                 var address2 = new SockaddrIn6 ();
 432                                 if (Syscall.getsockname (so1, address2) < 0)
 433                                         UnixMarshal.ThrowExceptionForLastError ();
 434
 435                                 Assert.AreEqual (address1, address2);
 436                                 Assert.IsTrue (Syscall.ntohs (address1.sin6_port) != 0);
 437                                 address1.sin6_port = 0;
 438                                 Assert.AreEqual (address, address1);
 439
 440                                 var address3 = new Sockaddr ();
 441                                 if (Syscall.getsockname (so1, address3) < 0)
 442                                         UnixMarshal.ThrowExceptionForLastError ();
 443                                 Assert.AreEqual (address.sa_family, address3.sa_family);
 444
 445                                 // Try to store a sockaddr_in6 into a Sockaddr. Should fail because sockaddr_in6 should be larger than sockaddr_in
 446                                 var address4 = new SockaddrIn ();
 447                                 if (Syscall.getsockname (so1, address4) == 0)
 448                                         Assert.Fail ("getsockname() should have failed");
 449                                 Assert.AreEqual (Errno.ENOBUFS, Stdlib.GetLastError ());
 450                         });
 451                 }
 452
 453                 [Test]
 454                 public void UnixAccept ()
 455                 {
 456                         var address = new SockaddrUn (TempFolder + "/socket1");
 457                         var address2 = SockaddrUn.FromSockaddrStorage (address.ToSockaddrStorage ());
 458                         Assert.AreEqual (address, address2);
 459
 460                         WithSockets (UnixAddressFamily.AF_UNIX, UnixSocketType.SOCK_STREAM, 0, (so1, so2) => {
 461                                 if (Syscall.bind (so1, address) < 0)
 462                                         UnixMarshal.ThrowExceptionForLastError ();
 463
 464                                 if (Syscall.listen (so1, 5) < 0)
 465                                         UnixMarshal.ThrowExceptionForLastError ();
 466
 467                                 if (Syscall.connect (so2, address) < 0)
 468                                         UnixMarshal.ThrowExceptionForLastError ();
 469
 470                                 var address3 = new SockaddrUn ();
 471                                 if (Syscall.getsockname (so1, address3) < 0)
 472                                         UnixMarshal.ThrowExceptionForLastError ();
 473                                 Assert.AreEqual (address, address3);
 474
 475                                 var address4 = new SockaddrStorage ();
 476                                 if (Syscall.getsockname (so1, address4) < 0)
 477                                         UnixMarshal.ThrowExceptionForLastError ();
 478                                 Assert.AreEqual (UnixAddressFamily.AF_UNIX, address4.sa_family);
 479                                 Assert.AreEqual (address3, SockaddrUn.FromSockaddrStorage (address4));
 480
 481                                 var address5 = new SockaddrUn ();
 482                                 if (Syscall.getsockname (so1, address5) < 0)
 483                                         UnixMarshal.ThrowExceptionForLastError ();
 484                                 Assert.AreEqual (UnixAddressFamily.AF_UNIX, address5.sa_family);
 485
 486                                 // Check getsockname(socket, null)
 487                                 if (Syscall.getsockname (so1, null) < 0)
 488                                         UnixMarshal.ThrowExceptionForLastError ();
 489
 490                                 int so3;
 491                                 var remote = new SockaddrUn ();
 492                                 if ((so3 = Syscall.accept (so1, remote)) < 0)
 493                                         UnixMarshal.ThrowExceptionForLastError ();
 494                                 try {
 495                                         // Send and receive a few bytes
 496                                         long ret;
 497                                         var buffer1 = new byte[] { 42, 43, 44 };
 498                                         ret = Syscall.send (so2, buffer1, (ulong) buffer1.Length, 0);
 499                                         if (ret < 0)
 500                                                 UnixMarshal.ThrowExceptionForLastError ();
 501
 502                                         var buffer2 = new byte[1024];
 503                                         ret = Syscall.recv (so3, buffer2, (ulong) buffer2.Length, 0);
 504                                         if (ret < 0)
 505                                                 UnixMarshal.ThrowExceptionForLastError ();
 506
 507                                         Assert.AreEqual (buffer1.Length, ret);
 508                                         for (int i = 0; i < buffer1.Length; i++)
 509                                                 Assert.AreEqual (buffer1[i], buffer2[i]);
 510                                 } finally {
 511                                         if (Syscall.close (so3) < 0)
 512                                                 UnixMarshal.ThrowExceptionForLastError ();
 513                                 }
 514                         });
 515                 }
 516
 517                 [Test]
 518                 public void Accept4 ()
 519                 {
 520                         WithSockets (UnixAddressFamily.AF_UNIX, UnixSocketType.SOCK_STREAM, 0, (so1, so2) => {
 521                                 var address = new SockaddrUn (TempFolder + "/socket2");
 522                                 if (Syscall.bind (so1, address) < 0)
 523                                         UnixMarshal.ThrowExceptionForLastError ();
 524                                 if (Syscall.listen (so1, 5) < 0)
 525                                         UnixMarshal.ThrowExceptionForLastError ();
 526                                 if (Syscall.connect (so2, address) < 0)
 527                                         UnixMarshal.ThrowExceptionForLastError ();
 528
 529                                 int so3;
 530                                 var remote = new SockaddrUn ();
 531                                 if ((so3 = Syscall.accept4 (so1, remote, UnixSocketFlags.SOCK_CLOEXEC | UnixSocketFlags.SOCK_NONBLOCK)) < 0)
 532                                         UnixMarshal.ThrowExceptionForLastError ();
 533                                 try {
 534                                         int _flags;
 535                                         if ((_flags = Syscall.fcntl (so3, FcntlCommand.F_GETFL)) < 0)
 536                                                 UnixMarshal.ThrowExceptionForLastError ();
 537                                         var flags = NativeConvert.ToOpenFlags (_flags);
 538                                         Assert.IsTrue ((flags & OpenFlags.O_NONBLOCK) != 0);
 539
 540                                         int _flagsFD;
 541                                         if ((_flagsFD = Syscall.fcntl (so3, FcntlCommand.F_GETFD)) < 0)
 542                                                 UnixMarshal.ThrowExceptionForLastError ();
 543                                         // FD_CLOEXEC must be set
 544                                         //var flagsFD = NativeConvert.ToFdFlags (_flagsFD);
 545                                         //Assert.IsTrue ((flagsFD & FdFlags.FD_CLOEXEC) != 0);
 546                                         Assert.IsTrue (_flagsFD != 0);
 547                                 } finally {
 548                                         if (Syscall.close (so3) < 0)
 549                                                 UnixMarshal.ThrowExceptionForLastError ();
 550                                 }
 551                         });
 552                 }
 553
 554                 [Test]
 555                 public void SendToRecvFrom ()
 556                 {
 557                         WithSockets (UnixAddressFamily.AF_INET, UnixSocketType.SOCK_DGRAM, UnixSocketProtocol.IPPROTO_UDP, (so1, so2) => {
 558                                 // Bind UDP socket so1 to 127.0.0.1 with dynamic port
 559                                 var address = new SockaddrIn { sin_family = UnixAddressFamily.AF_INET, sin_port = Syscall.htons (0), sin_addr = new InAddr (127, 0, 0, 1) };
 560                                 if (Syscall.bind (so1, address) < 0)
 561                                         UnixMarshal.ThrowExceptionForLastError ();
 562
 563                                 // Get actual port number using getsockname()
 564                                 var actualAddress = new SockaddrIn ();
 565                                 if (Syscall.getsockname (so1, actualAddress) < 0)
 566                                         UnixMarshal.ThrowExceptionForLastError ();
 567                                 Assert.AreEqual (actualAddress.sa_family, UnixAddressFamily.AF_INET);
 568                                 var port = Syscall.ntohs (actualAddress.sin_port);
 569                                 Assert.IsTrue (port != 0);
 570
 571
 572                                 var remoteAddress = new SockaddrIn {
 573                                         sin_family = UnixAddressFamily.AF_INET,
 574                                         sin_port = Syscall.htons (port),
 575                                         sin_addr = new InAddr (127, 0, 0, 1),
 576                                 };
 577
 578                                 // Send and receive a few bytes
 579                                 long ret;
 580                                 var buffer1 = new byte[] { 42, 43, 44 };
 581                                 ret = Syscall.sendto (so2, buffer1, (ulong) buffer1.Length, 0, remoteAddress);
 582                                 if (ret < 0)
 583                                         UnixMarshal.ThrowExceptionForLastError ();
 584
 585                                 var senderAddress = new SockaddrIn ();
 586                                 var buffer2 = new byte[1024];
 587                                 ret = Syscall.recvfrom (so1, buffer2, (ulong) buffer2.Length, 0, senderAddress);
 588                                 if (ret < 0)
 589                                         UnixMarshal.ThrowExceptionForLastError ();
 590                                 Assert.AreEqual (senderAddress.sa_family, UnixAddressFamily.AF_INET);
 591                                 Assert.AreEqual (senderAddress.sin_addr, new InAddr (127, 0, 0, 1));
 592
 593                                 Assert.AreEqual (buffer1.Length, ret);
 594                                 for (int i = 0; i < buffer1.Length; i++)
 595                                         Assert.AreEqual (buffer1[i], buffer2[i]);
 596                         });
 597                 }
 598         }
 599 }
 600
 601 // vim: noexpandtab
 602 // Local Variables:
 603 // tab-width: 4
 604 // c-basic-offset: 4
 605 // indent-tabs-mode: t
 606 // End: