| | | 1 | | // Copyright (c) ZeroC, Inc. |
| | | 2 | | |
| | | 3 | | using System.Globalization; |
| | | 4 | | using System.Net; |
| | | 5 | | using System.Net.NetworkInformation; |
| | | 6 | | using System.Net.Sockets; |
| | | 7 | | |
| | | 8 | | namespace Ice.Internal; |
| | | 9 | | |
| | | 10 | | internal sealed class Network |
| | | 11 | | { |
| | | 12 | | // ProtocolSupport |
| | | 13 | | public const int EnableIPv4 = 0; |
| | | 14 | | public const int EnableIPv6 = 1; |
| | | 15 | | public const int EnableBoth = 2; |
| | | 16 | | |
| | | 17 | | internal static SocketError socketErrorCode(System.Net.Sockets.SocketException ex) => ex.SocketErrorCode; |
| | | 18 | | |
| | | 19 | | internal static bool interrupted(System.Net.Sockets.SocketException ex) => |
| | | 20 | | socketErrorCode(ex) == SocketError.Interrupted; |
| | | 21 | | |
| | | 22 | | internal static bool wouldBlock(System.Net.Sockets.SocketException ex) => |
| | | 23 | | socketErrorCode(ex) == SocketError.WouldBlock; |
| | | 24 | | |
| | | 25 | | internal static bool connectionLost(System.Net.Sockets.SocketException ex) |
| | | 26 | | { |
| | | 27 | | SocketError error = socketErrorCode(ex); |
| | | 28 | | return error == SocketError.ConnectionReset || |
| | | 29 | | error == SocketError.Shutdown || |
| | | 30 | | error == SocketError.ConnectionAborted || |
| | | 31 | | error == SocketError.NetworkDown || |
| | | 32 | | error == SocketError.NetworkReset; |
| | | 33 | | } |
| | | 34 | | |
| | | 35 | | internal static bool connectionLost(System.IO.IOException ex) |
| | | 36 | | { |
| | | 37 | | // |
| | | 38 | | // In some cases the IOException has an inner exception that we can pass directly |
| | | 39 | | // to the other overloading of connectionLost(). |
| | | 40 | | // |
| | | 41 | | if (ex.InnerException != null && ex.InnerException is System.Net.Sockets.SocketException) |
| | | 42 | | { |
| | | 43 | | return connectionLost(ex.InnerException as System.Net.Sockets.SocketException); |
| | | 44 | | } |
| | | 45 | | |
| | | 46 | | // |
| | | 47 | | // In other cases the IOException has no inner exception. We could examine the |
| | | 48 | | // exception's message, but that is fragile due to localization issues. We |
| | | 49 | | // resort to extracting the value of the protected HResult member via reflection. |
| | | 50 | | // |
| | | 51 | | int hr = (int)ex.GetType().GetProperty( |
| | | 52 | | "HResult", |
| | | 53 | | System.Reflection.BindingFlags.Instance | |
| | | 54 | | System.Reflection.BindingFlags.NonPublic | |
| | | 55 | | System.Reflection.BindingFlags.Public).GetValue(ex, null); |
| | | 56 | | |
| | | 57 | | // |
| | | 58 | | // This value corresponds to the following errors: |
| | | 59 | | // |
| | | 60 | | // "Authentication failed because the remote party has closed the transport stream" |
| | | 61 | | // |
| | | 62 | | if (hr == -2146232800) |
| | | 63 | | { |
| | | 64 | | return true; |
| | | 65 | | } |
| | | 66 | | return false; |
| | | 67 | | } |
| | | 68 | | |
| | | 69 | | internal static bool connectionRefused(System.Net.Sockets.SocketException ex) => |
| | | 70 | | socketErrorCode(ex) == SocketError.ConnectionRefused; |
| | | 71 | | |
| | | 72 | | internal static bool recvTruncated(System.Net.Sockets.SocketException ex) => |
| | | 73 | | socketErrorCode(ex) == SocketError.MessageSize; |
| | | 74 | | |
| | | 75 | | internal static bool timeout(System.IO.IOException ex) => |
| | | 76 | | // |
| | | 77 | | // TODO: Instead of testing for an English substring, we need to examine the inner |
| | | 78 | | // exception (if there is one). |
| | | 79 | | // |
| | | 80 | | ex.Message.Contains("period of time", StringComparison.Ordinal); |
| | | 81 | | |
| | | 82 | | internal static bool isMulticast(IPEndPoint addr) |
| | | 83 | | { |
| | | 84 | | string ip = addr.Address.ToString().ToUpperInvariant(); |
| | | 85 | | if (addr.AddressFamily == AddressFamily.InterNetwork) |
| | | 86 | | { |
| | | 87 | | char[] splitChars = { '.' }; |
| | | 88 | | string[] arr = ip.Split(splitChars); |
| | | 89 | | try |
| | | 90 | | { |
| | | 91 | | int i = int.Parse(arr[0], CultureInfo.InvariantCulture); |
| | | 92 | | if (i >= 223 && i <= 239) |
| | | 93 | | { |
| | | 94 | | return true; |
| | | 95 | | } |
| | | 96 | | } |
| | | 97 | | catch (FormatException) |
| | | 98 | | { |
| | | 99 | | return false; |
| | | 100 | | } |
| | | 101 | | } |
| | | 102 | | else // AddressFamily.InterNetworkV6 |
| | | 103 | | { |
| | | 104 | | if (ip.StartsWith("FF", StringComparison.Ordinal)) |
| | | 105 | | { |
| | | 106 | | return true; |
| | | 107 | | } |
| | | 108 | | } |
| | | 109 | | return false; |
| | | 110 | | } |
| | | 111 | | |
| | | 112 | | internal static bool isIPv6Supported() |
| | | 113 | | { |
| | | 114 | | try |
| | | 115 | | { |
| | | 116 | | using var socket = new Socket(AddressFamily.InterNetworkV6, SocketType.Stream, ProtocolType.Tcp); |
| | | 117 | | closeSocketNoThrow(socket); |
| | | 118 | | return true; |
| | | 119 | | } |
| | | 120 | | catch (System.Net.Sockets.SocketException) |
| | | 121 | | { |
| | | 122 | | return false; |
| | | 123 | | } |
| | | 124 | | } |
| | | 125 | | |
| | | 126 | | internal static Socket createSocket(bool udp, AddressFamily family) |
| | | 127 | | { |
| | | 128 | | Socket socket; |
| | | 129 | | |
| | | 130 | | try |
| | | 131 | | { |
| | | 132 | | if (udp) |
| | | 133 | | { |
| | | 134 | | socket = new Socket(family, SocketType.Dgram, ProtocolType.Udp); |
| | | 135 | | } |
| | | 136 | | else |
| | | 137 | | { |
| | | 138 | | socket = new Socket(family, SocketType.Stream, ProtocolType.Tcp); |
| | | 139 | | } |
| | | 140 | | } |
| | | 141 | | catch (System.Net.Sockets.SocketException ex) |
| | | 142 | | { |
| | | 143 | | throw new Ice.SocketException(ex); |
| | | 144 | | } |
| | | 145 | | catch (ArgumentException ex) |
| | | 146 | | { |
| | | 147 | | throw new Ice.SocketException(ex); |
| | | 148 | | } |
| | | 149 | | |
| | | 150 | | if (!udp) |
| | | 151 | | { |
| | | 152 | | try |
| | | 153 | | { |
| | | 154 | | setTcpNoDelay(socket); |
| | | 155 | | socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.KeepAlive, 1); |
| | | 156 | | } |
| | | 157 | | catch (System.Net.Sockets.SocketException ex) |
| | | 158 | | { |
| | | 159 | | closeSocketNoThrow(socket); |
| | | 160 | | throw new Ice.SocketException(ex); |
| | | 161 | | } |
| | | 162 | | } |
| | | 163 | | return socket; |
| | | 164 | | } |
| | | 165 | | |
| | | 166 | | internal static Socket createServerSocket(bool udp, AddressFamily family, int protocol) |
| | | 167 | | { |
| | | 168 | | Socket socket = createSocket(udp, family); |
| | | 169 | | if (family == AddressFamily.InterNetworkV6 && protocol != EnableIPv4) |
| | | 170 | | { |
| | | 171 | | try |
| | | 172 | | { |
| | | 173 | | int flag = protocol == EnableIPv6 ? 1 : 0; |
| | | 174 | | socket.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.IPv6Only, flag); |
| | | 175 | | } |
| | | 176 | | catch (System.Net.Sockets.SocketException ex) |
| | | 177 | | { |
| | | 178 | | closeSocketNoThrow(socket); |
| | | 179 | | throw new Ice.SocketException(ex); |
| | | 180 | | } |
| | | 181 | | } |
| | | 182 | | return socket; |
| | | 183 | | } |
| | | 184 | | |
| | | 185 | | internal static void closeSocketNoThrow(Socket socket) |
| | | 186 | | { |
| | | 187 | | if (socket == null) |
| | | 188 | | { |
| | | 189 | | return; |
| | | 190 | | } |
| | | 191 | | try |
| | | 192 | | { |
| | | 193 | | socket.Close(); |
| | | 194 | | } |
| | | 195 | | catch (System.Net.Sockets.SocketException) |
| | | 196 | | { |
| | | 197 | | // Ignore |
| | | 198 | | } |
| | | 199 | | } |
| | | 200 | | |
| | | 201 | | internal static void closeSocket(Socket socket) |
| | | 202 | | { |
| | | 203 | | if (socket == null) |
| | | 204 | | { |
| | | 205 | | return; |
| | | 206 | | } |
| | | 207 | | try |
| | | 208 | | { |
| | | 209 | | socket.Close(); |
| | | 210 | | } |
| | | 211 | | catch (System.Net.Sockets.SocketException ex) |
| | | 212 | | { |
| | | 213 | | throw new Ice.SocketException(ex); |
| | | 214 | | } |
| | | 215 | | } |
| | | 216 | | |
| | | 217 | | internal static void setTcpNoDelay(Socket socket) |
| | | 218 | | { |
| | | 219 | | try |
| | | 220 | | { |
| | | 221 | | socket.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.NoDelay, 1); |
| | | 222 | | } |
| | | 223 | | catch (System.Exception ex) |
| | | 224 | | { |
| | | 225 | | closeSocketNoThrow(socket); |
| | | 226 | | throw new Ice.SocketException(ex); |
| | | 227 | | } |
| | | 228 | | } |
| | | 229 | | |
| | | 230 | | internal static void setBlock(Socket socket, bool block) |
| | | 231 | | { |
| | | 232 | | try |
| | | 233 | | { |
| | | 234 | | socket.Blocking = block; |
| | | 235 | | } |
| | | 236 | | catch (System.Net.Sockets.SocketException ex) |
| | | 237 | | { |
| | | 238 | | closeSocketNoThrow(socket); |
| | | 239 | | throw new Ice.SocketException(ex); |
| | | 240 | | } |
| | | 241 | | } |
| | | 242 | | |
| | | 243 | | internal static void setSendBufferSize(Socket socket, int sz) |
| | | 244 | | { |
| | | 245 | | try |
| | | 246 | | { |
| | | 247 | | socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendBuffer, sz); |
| | | 248 | | } |
| | | 249 | | catch (System.Net.Sockets.SocketException ex) |
| | | 250 | | { |
| | | 251 | | closeSocketNoThrow(socket); |
| | | 252 | | throw new Ice.SocketException(ex); |
| | | 253 | | } |
| | | 254 | | } |
| | | 255 | | |
| | | 256 | | internal static int getSendBufferSize(Socket socket) |
| | | 257 | | { |
| | | 258 | | int sz; |
| | | 259 | | try |
| | | 260 | | { |
| | | 261 | | sz = (int)socket.GetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendBuffer); |
| | | 262 | | } |
| | | 263 | | catch (System.Net.Sockets.SocketException ex) |
| | | 264 | | { |
| | | 265 | | closeSocketNoThrow(socket); |
| | | 266 | | throw new Ice.SocketException(ex); |
| | | 267 | | } |
| | | 268 | | return sz; |
| | | 269 | | } |
| | | 270 | | |
| | | 271 | | internal static void setRecvBufferSize(Socket socket, int sz) |
| | | 272 | | { |
| | | 273 | | try |
| | | 274 | | { |
| | | 275 | | socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveBuffer, sz); |
| | | 276 | | } |
| | | 277 | | catch (System.Net.Sockets.SocketException ex) |
| | | 278 | | { |
| | | 279 | | closeSocketNoThrow(socket); |
| | | 280 | | throw new Ice.SocketException(ex); |
| | | 281 | | } |
| | | 282 | | } |
| | | 283 | | |
| | | 284 | | internal static int getRecvBufferSize(Socket socket) |
| | | 285 | | { |
| | | 286 | | int sz; |
| | | 287 | | try |
| | | 288 | | { |
| | | 289 | | sz = (int)socket.GetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveBuffer); |
| | | 290 | | } |
| | | 291 | | catch (System.Net.Sockets.SocketException ex) |
| | | 292 | | { |
| | | 293 | | closeSocketNoThrow(socket); |
| | | 294 | | throw new Ice.SocketException(ex); |
| | | 295 | | } |
| | | 296 | | return sz; |
| | | 297 | | } |
| | | 298 | | |
| | | 299 | | internal static void setReuseAddress(Socket socket, bool reuse) |
| | | 300 | | { |
| | | 301 | | try |
| | | 302 | | { |
| | | 303 | | socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, reuse ? 1 : 0); |
| | | 304 | | } |
| | | 305 | | catch (System.Net.Sockets.SocketException ex) |
| | | 306 | | { |
| | | 307 | | closeSocketNoThrow(socket); |
| | | 308 | | throw new Ice.SocketException(ex); |
| | | 309 | | } |
| | | 310 | | } |
| | | 311 | | |
| | | 312 | | internal static void setMcastInterface(Socket socket, string iface, AddressFamily family) |
| | | 313 | | { |
| | | 314 | | try |
| | | 315 | | { |
| | | 316 | | if (family == AddressFamily.InterNetwork) |
| | | 317 | | { |
| | | 318 | | socket.SetSocketOption( |
| | | 319 | | SocketOptionLevel.IP, |
| | | 320 | | SocketOptionName.MulticastInterface, |
| | | 321 | | getInterfaceAddress(iface, family).GetAddressBytes()); |
| | | 322 | | } |
| | | 323 | | else |
| | | 324 | | { |
| | | 325 | | socket.SetSocketOption( |
| | | 326 | | SocketOptionLevel.IPv6, |
| | | 327 | | SocketOptionName.MulticastInterface, |
| | | 328 | | getInterfaceIndex(iface, family)); |
| | | 329 | | } |
| | | 330 | | } |
| | | 331 | | catch (System.Exception ex) |
| | | 332 | | { |
| | | 333 | | closeSocketNoThrow(socket); |
| | | 334 | | throw new Ice.SocketException(ex); |
| | | 335 | | } |
| | | 336 | | } |
| | | 337 | | |
| | | 338 | | internal static void setMcastGroup(Socket s, IPAddress group, string iface) |
| | | 339 | | { |
| | | 340 | | try |
| | | 341 | | { |
| | | 342 | | var indexes = new HashSet<int>(); |
| | | 343 | | foreach (string intf in getInterfacesForMulticast(iface, getProtocolSupport(group))) |
| | | 344 | | { |
| | | 345 | | if (group.AddressFamily == AddressFamily.InterNetwork) |
| | | 346 | | { |
| | | 347 | | MulticastOption option; |
| | | 348 | | IPAddress addr = getInterfaceAddress(intf, group.AddressFamily); |
| | | 349 | | if (addr == null) |
| | | 350 | | { |
| | | 351 | | option = new MulticastOption(group); |
| | | 352 | | } |
| | | 353 | | else |
| | | 354 | | { |
| | | 355 | | option = new MulticastOption(group, addr); |
| | | 356 | | } |
| | | 357 | | s.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, option); |
| | | 358 | | } |
| | | 359 | | else |
| | | 360 | | { |
| | | 361 | | int index = getInterfaceIndex(intf, group.AddressFamily); |
| | | 362 | | if (indexes.Add(index)) |
| | | 363 | | { |
| | | 364 | | IPv6MulticastOption option; |
| | | 365 | | if (index == -1) |
| | | 366 | | { |
| | | 367 | | option = new IPv6MulticastOption(group); |
| | | 368 | | } |
| | | 369 | | else |
| | | 370 | | { |
| | | 371 | | option = new IPv6MulticastOption(group, index); |
| | | 372 | | } |
| | | 373 | | s.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.AddMembership, option); |
| | | 374 | | } |
| | | 375 | | } |
| | | 376 | | } |
| | | 377 | | } |
| | | 378 | | catch (System.Exception ex) |
| | | 379 | | { |
| | | 380 | | closeSocketNoThrow(s); |
| | | 381 | | throw new Ice.SocketException(ex); |
| | | 382 | | } |
| | | 383 | | } |
| | | 384 | | |
| | | 385 | | internal static void setMcastTtl(Socket socket, int ttl, AddressFamily family) |
| | | 386 | | { |
| | | 387 | | try |
| | | 388 | | { |
| | | 389 | | if (family == AddressFamily.InterNetwork) |
| | | 390 | | { |
| | | 391 | | socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastTimeToLive, ttl); |
| | | 392 | | } |
| | | 393 | | else |
| | | 394 | | { |
| | | 395 | | socket.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.MulticastTimeToLive, ttl); |
| | | 396 | | } |
| | | 397 | | } |
| | | 398 | | catch (System.Net.Sockets.SocketException ex) |
| | | 399 | | { |
| | | 400 | | closeSocketNoThrow(socket); |
| | | 401 | | throw new Ice.SocketException(ex); |
| | | 402 | | } |
| | | 403 | | } |
| | | 404 | | |
| | | 405 | | internal static IPEndPoint doBind(Socket socket, EndPoint addr) |
| | | 406 | | { |
| | | 407 | | try |
| | | 408 | | { |
| | | 409 | | socket.Bind(addr); |
| | | 410 | | return (IPEndPoint)socket.LocalEndPoint; |
| | | 411 | | } |
| | | 412 | | catch (System.Net.Sockets.SocketException ex) |
| | | 413 | | { |
| | | 414 | | closeSocketNoThrow(socket); |
| | | 415 | | throw new Ice.SocketException(ex); |
| | | 416 | | } |
| | | 417 | | } |
| | | 418 | | |
| | | 419 | | internal static void doListen(Socket socket, int backlog) |
| | | 420 | | { |
| | | 421 | | repeatListen: |
| | | 422 | | |
| | | 423 | | try |
| | | 424 | | { |
| | | 425 | | socket.Listen(backlog); |
| | | 426 | | } |
| | | 427 | | catch (System.Net.Sockets.SocketException ex) |
| | | 428 | | { |
| | | 429 | | if (interrupted(ex)) |
| | | 430 | | { |
| | | 431 | | goto repeatListen; |
| | | 432 | | } |
| | | 433 | | |
| | | 434 | | closeSocketNoThrow(socket); |
| | | 435 | | throw new Ice.SocketException(ex); |
| | | 436 | | } |
| | | 437 | | } |
| | | 438 | | |
| | | 439 | | internal static int getProtocolSupport(IPAddress addr) => |
| | | 440 | | addr.AddressFamily == AddressFamily.InterNetwork ? EnableIPv4 : EnableIPv6; |
| | | 441 | | |
| | | 442 | | internal static EndPoint getAddressForServer(string host, int port, int protocol, bool preferIPv6) |
| | | 443 | | { |
| | | 444 | | if (host.Length == 0) |
| | | 445 | | { |
| | | 446 | | if (protocol != EnableIPv4) |
| | | 447 | | { |
| | | 448 | | return new IPEndPoint(IPAddress.IPv6Any, port); |
| | | 449 | | } |
| | | 450 | | else |
| | | 451 | | { |
| | | 452 | | return new IPEndPoint(IPAddress.Any, port); |
| | | 453 | | } |
| | | 454 | | } |
| | | 455 | | return getAddresses(host, port, protocol, preferIPv6, true)[0]; |
| | | 456 | | } |
| | | 457 | | |
| | | 458 | | internal static List<EndPoint> getAddresses( |
| | | 459 | | string host, |
| | | 460 | | int port, |
| | | 461 | | int protocol, |
| | | 462 | | bool preferIPv6, |
| | | 463 | | bool blocking) |
| | | 464 | | { |
| | | 465 | | var addresses = new List<EndPoint>(); |
| | | 466 | | if (host.Length == 0) |
| | | 467 | | { |
| | | 468 | | foreach (IPAddress a in getLoopbackAddresses(protocol)) |
| | | 469 | | { |
| | | 470 | | addresses.Add(new IPEndPoint(a, port)); |
| | | 471 | | } |
| | | 472 | | if (protocol == EnableBoth) |
| | | 473 | | { |
| | | 474 | | if (preferIPv6) |
| | | 475 | | { |
| | | 476 | | Ice.UtilInternal.Collections.Sort(ref addresses, _preferIPv6Comparator); |
| | | 477 | | } |
| | | 478 | | else |
| | | 479 | | { |
| | | 480 | | Ice.UtilInternal.Collections.Sort(ref addresses, _preferIPv4Comparator); |
| | | 481 | | } |
| | | 482 | | } |
| | | 483 | | return addresses; |
| | | 484 | | } |
| | | 485 | | |
| | | 486 | | int retry = 5; |
| | | 487 | | |
| | | 488 | | repeatGetHostByName: |
| | | 489 | | try |
| | | 490 | | { |
| | | 491 | | // |
| | | 492 | | // No need for lookup if host is ip address. |
| | | 493 | | // |
| | | 494 | | try |
| | | 495 | | { |
| | | 496 | | var addr = IPAddress.Parse(host); |
| | | 497 | | if ((addr.AddressFamily == AddressFamily.InterNetwork && protocol != EnableIPv6) || |
| | | 498 | | (addr.AddressFamily == AddressFamily.InterNetworkV6 && protocol != EnableIPv4)) |
| | | 499 | | { |
| | | 500 | | addresses.Add(new IPEndPoint(addr, port)); |
| | | 501 | | return addresses; |
| | | 502 | | } |
| | | 503 | | else |
| | | 504 | | { |
| | | 505 | | throw new DNSException(host); |
| | | 506 | | } |
| | | 507 | | } |
| | | 508 | | catch (FormatException) |
| | | 509 | | { |
| | | 510 | | if (!blocking) |
| | | 511 | | { |
| | | 512 | | return addresses; |
| | | 513 | | } |
| | | 514 | | } |
| | | 515 | | |
| | | 516 | | foreach (IPAddress a in Dns.GetHostAddresses(host)) |
| | | 517 | | { |
| | | 518 | | if ((a.AddressFamily == AddressFamily.InterNetwork && protocol != EnableIPv6) || |
| | | 519 | | (a.AddressFamily == AddressFamily.InterNetworkV6 && protocol != EnableIPv4)) |
| | | 520 | | { |
| | | 521 | | addresses.Add(new IPEndPoint(a, port)); |
| | | 522 | | } |
| | | 523 | | } |
| | | 524 | | |
| | | 525 | | if (protocol == EnableBoth) |
| | | 526 | | { |
| | | 527 | | if (preferIPv6) |
| | | 528 | | { |
| | | 529 | | Ice.UtilInternal.Collections.Sort(ref addresses, _preferIPv6Comparator); |
| | | 530 | | } |
| | | 531 | | else |
| | | 532 | | { |
| | | 533 | | Ice.UtilInternal.Collections.Sort(ref addresses, _preferIPv4Comparator); |
| | | 534 | | } |
| | | 535 | | } |
| | | 536 | | } |
| | | 537 | | catch (System.Net.Sockets.SocketException ex) |
| | | 538 | | { |
| | | 539 | | if (socketErrorCode(ex) == SocketError.TryAgain && --retry >= 0) |
| | | 540 | | { |
| | | 541 | | goto repeatGetHostByName; |
| | | 542 | | } |
| | | 543 | | throw new DNSException(host, ex); |
| | | 544 | | } |
| | | 545 | | catch (System.Exception ex) |
| | | 546 | | { |
| | | 547 | | throw new DNSException(host, ex); |
| | | 548 | | } |
| | | 549 | | |
| | | 550 | | // |
| | | 551 | | // No InterNetwork/InterNetworkV6 available. |
| | | 552 | | // |
| | | 553 | | if (addresses.Count == 0) |
| | | 554 | | { |
| | | 555 | | throw new DNSException(host); |
| | | 556 | | } |
| | | 557 | | return addresses; |
| | | 558 | | } |
| | | 559 | | |
| | | 560 | | // Only used for multicast. |
| | | 561 | | internal static IPAddress[] getLocalAddresses(int protocol) |
| | | 562 | | { |
| | | 563 | | List<IPAddress> addresses; |
| | | 564 | | int retry = 5; |
| | | 565 | | |
| | | 566 | | repeatGetHostByName: |
| | | 567 | | try |
| | | 568 | | { |
| | | 569 | | addresses = new List<IPAddress>(); |
| | | 570 | | IEnumerable<NetworkInterface> nics = NetworkInterface.GetAllNetworkInterfaces().Where( |
| | | 571 | | nic => nic.SupportsMulticast && nic.OperationalStatus == OperationalStatus.Up); |
| | | 572 | | |
| | | 573 | | foreach (NetworkInterface ni in nics) |
| | | 574 | | { |
| | | 575 | | IPInterfaceProperties ipProps = ni.GetIPProperties(); |
| | | 576 | | UnicastIPAddressInformationCollection uniColl = ipProps.UnicastAddresses; |
| | | 577 | | foreach (UnicastIPAddressInformation uni in uniColl) |
| | | 578 | | { |
| | | 579 | | if ((uni.Address.AddressFamily == AddressFamily.InterNetwork && protocol != EnableIPv6) || |
| | | 580 | | (uni.Address.AddressFamily == AddressFamily.InterNetworkV6 && protocol != EnableIPv4)) |
| | | 581 | | { |
| | | 582 | | if (!addresses.Contains(uni.Address)) |
| | | 583 | | { |
| | | 584 | | addresses.Add(uni.Address); |
| | | 585 | | break; // need only one address per interface |
| | | 586 | | } |
| | | 587 | | } |
| | | 588 | | } |
| | | 589 | | } |
| | | 590 | | } |
| | | 591 | | catch (System.Net.Sockets.SocketException ex) |
| | | 592 | | { |
| | | 593 | | if (socketErrorCode(ex) == SocketError.TryAgain && --retry >= 0) |
| | | 594 | | { |
| | | 595 | | goto repeatGetHostByName; |
| | | 596 | | } |
| | | 597 | | throw new DNSException("0.0.0.0", ex); |
| | | 598 | | } |
| | | 599 | | catch (System.Exception ex) |
| | | 600 | | { |
| | | 601 | | throw new DNSException("0.0.0.0", ex); |
| | | 602 | | } |
| | | 603 | | |
| | | 604 | | return addresses.ToArray(); |
| | | 605 | | } |
| | | 606 | | |
| | | 607 | | internal static void setTcpBufSize(Socket socket, ProtocolInstance instance) |
| | | 608 | | { |
| | | 609 | | // |
| | | 610 | | // By default, on Windows we use a 128KB buffer size. On Unix |
| | | 611 | | // platforms, we use the system defaults. |
| | | 612 | | // |
| | | 613 | | int dfltBufSize = 0; |
| | | 614 | | if (AssemblyUtil.isWindows) |
| | | 615 | | { |
| | | 616 | | dfltBufSize = 128 * 1024; |
| | | 617 | | } |
| | | 618 | | int rcvSize = instance.properties().getPropertyAsIntWithDefault("Ice.TCP.RcvSize", dfltBufSize); |
| | | 619 | | int sndSize = instance.properties().getPropertyAsIntWithDefault("Ice.TCP.SndSize", dfltBufSize); |
| | | 620 | | setTcpBufSize(socket, rcvSize, sndSize, instance); |
| | | 621 | | } |
| | | 622 | | |
| | | 623 | | internal static void setTcpBufSize(Socket socket, int rcvSize, int sndSize, ProtocolInstance instance) |
| | | 624 | | { |
| | | 625 | | if (rcvSize > 0) |
| | | 626 | | { |
| | | 627 | | // |
| | | 628 | | // Try to set the buffer size. The kernel will silently adjust |
| | | 629 | | // the size to an acceptable value. Then read the size back to |
| | | 630 | | // get the size that was actually set. |
| | | 631 | | // |
| | | 632 | | setRecvBufferSize(socket, rcvSize); |
| | | 633 | | int size = getRecvBufferSize(socket); |
| | | 634 | | if (size < rcvSize) |
| | | 635 | | { |
| | | 636 | | // Warn if the size that was set is less than the requested size and |
| | | 637 | | // we have not already warned. |
| | | 638 | | BufSizeWarnInfo winfo = instance.getBufSizeWarn(Ice.TCPEndpointType.value); |
| | | 639 | | if (!winfo.rcvWarn || rcvSize != winfo.rcvSize) |
| | | 640 | | { |
| | | 641 | | instance.logger().warning("TCP receive buffer size: requested size of " + rcvSize + |
| | | 642 | | " adjusted to " + size); |
| | | 643 | | instance.setRcvBufSizeWarn(Ice.TCPEndpointType.value, rcvSize); |
| | | 644 | | } |
| | | 645 | | } |
| | | 646 | | } |
| | | 647 | | |
| | | 648 | | if (sndSize > 0) |
| | | 649 | | { |
| | | 650 | | // |
| | | 651 | | // Try to set the buffer size. The kernel will silently adjust |
| | | 652 | | // the size to an acceptable value. Then read the size back to |
| | | 653 | | // get the size that was actually set. |
| | | 654 | | // |
| | | 655 | | setSendBufferSize(socket, sndSize); |
| | | 656 | | int size = getSendBufferSize(socket); |
| | | 657 | | if (size < sndSize) // Warn if the size that was set is less than the requested size. |
| | | 658 | | { |
| | | 659 | | // Warn if the size that was set is less than the requested size and |
| | | 660 | | // we have not already warned. |
| | | 661 | | BufSizeWarnInfo winfo = instance.getBufSizeWarn(Ice.TCPEndpointType.value); |
| | | 662 | | if (!winfo.sndWarn || sndSize != winfo.sndSize) |
| | | 663 | | { |
| | | 664 | | instance.logger().warning("TCP send buffer size: requested size of " + sndSize + |
| | | 665 | | " adjusted to " + size); |
| | | 666 | | instance.setSndBufSizeWarn(Ice.TCPEndpointType.value, sndSize); |
| | | 667 | | } |
| | | 668 | | } |
| | | 669 | | } |
| | | 670 | | } |
| | | 671 | | |
| | | 672 | | internal static List<string> getInterfacesForMulticast(string intf, int protocol) |
| | | 673 | | { |
| | | 674 | | var interfaces = new List<string>(); |
| | | 675 | | if (isWildcard(intf, out bool ipv4Wildcard)) |
| | | 676 | | { |
| | | 677 | | foreach (IPAddress a in getLocalAddresses(ipv4Wildcard ? EnableIPv4 : protocol)) |
| | | 678 | | { |
| | | 679 | | interfaces.Add(a.ToString()); |
| | | 680 | | } |
| | | 681 | | } |
| | | 682 | | if (interfaces.Count == 0) |
| | | 683 | | { |
| | | 684 | | interfaces.Add(intf); |
| | | 685 | | } |
| | | 686 | | return interfaces; |
| | | 687 | | } |
| | | 688 | | |
| | | 689 | | internal static string fdToString(Socket socket, NetworkProxy proxy, EndPoint target) |
| | | 690 | | { |
| | | 691 | | try |
| | | 692 | | { |
| | | 693 | | if (socket == null) |
| | | 694 | | { |
| | | 695 | | return "<closed>"; |
| | | 696 | | } |
| | | 697 | | |
| | | 698 | | EndPoint remote = getRemoteAddress(socket); |
| | | 699 | | |
| | | 700 | | var s = new System.Text.StringBuilder(); |
| | | 701 | | s.Append("local address = " + localAddrToString(getLocalAddress(socket))); |
| | | 702 | | if (proxy != null) |
| | | 703 | | { |
| | | 704 | | remote ??= proxy.getAddress(); |
| | | 705 | | s.Append("\n" + proxy.getName() + " proxy address = " + remoteAddrToString(remote)); |
| | | 706 | | s.Append("\nremote address = " + remoteAddrToString(target)); |
| | | 707 | | } |
| | | 708 | | else |
| | | 709 | | { |
| | | 710 | | remote ??= target; |
| | | 711 | | s.Append("\nremote address = " + remoteAddrToString(remote)); |
| | | 712 | | } |
| | | 713 | | return s.ToString(); |
| | | 714 | | } |
| | | 715 | | catch (ObjectDisposedException) |
| | | 716 | | { |
| | | 717 | | return "<closed>"; |
| | | 718 | | } |
| | | 719 | | } |
| | | 720 | | |
| | | 721 | | internal static string fdToString(Socket socket) |
| | | 722 | | { |
| | | 723 | | try |
| | | 724 | | { |
| | | 725 | | if (socket == null) |
| | | 726 | | { |
| | | 727 | | return "<closed>"; |
| | | 728 | | } |
| | | 729 | | var s = new System.Text.StringBuilder(); |
| | | 730 | | s.Append("local address = " + localAddrToString(getLocalAddress(socket))); |
| | | 731 | | s.Append("\nremote address = " + remoteAddrToString(getRemoteAddress(socket))); |
| | | 732 | | return s.ToString(); |
| | | 733 | | } |
| | | 734 | | catch (ObjectDisposedException) |
| | | 735 | | { |
| | | 736 | | return "<closed>"; |
| | | 737 | | } |
| | | 738 | | } |
| | | 739 | | |
| | | 740 | | internal static string |
| | | 741 | | addrToString(EndPoint addr) => endpointAddressToString(addr) + ":" + endpointPort(addr); |
| | | 742 | | |
| | | 743 | | internal static string localAddrToString(EndPoint endpoint) |
| | | 744 | | { |
| | | 745 | | if (endpoint == null) |
| | | 746 | | { |
| | | 747 | | return "<not bound>"; |
| | | 748 | | } |
| | | 749 | | return endpointAddressToString(endpoint) + ":" + endpointPort(endpoint); |
| | | 750 | | } |
| | | 751 | | |
| | | 752 | | internal static string remoteAddrToString(EndPoint endpoint) |
| | | 753 | | { |
| | | 754 | | if (endpoint == null) |
| | | 755 | | { |
| | | 756 | | return "<not connected>"; |
| | | 757 | | } |
| | | 758 | | return endpointAddressToString(endpoint) + ":" + endpointPort(endpoint); |
| | | 759 | | } |
| | | 760 | | |
| | | 761 | | internal static EndPoint getLocalAddress(Socket socket) |
| | | 762 | | { |
| | | 763 | | try |
| | | 764 | | { |
| | | 765 | | return socket.LocalEndPoint; |
| | | 766 | | } |
| | | 767 | | catch (System.Net.Sockets.SocketException ex) |
| | | 768 | | { |
| | | 769 | | throw new Ice.SocketException(ex); |
| | | 770 | | } |
| | | 771 | | } |
| | | 772 | | |
| | | 773 | | internal static EndPoint getRemoteAddress(Socket socket) |
| | | 774 | | { |
| | | 775 | | try |
| | | 776 | | { |
| | | 777 | | return socket.RemoteEndPoint; |
| | | 778 | | } |
| | | 779 | | catch (System.Net.Sockets.SocketException) |
| | | 780 | | { |
| | | 781 | | } |
| | | 782 | | return null; |
| | | 783 | | } |
| | | 784 | | |
| | | 785 | | private static IPAddress getInterfaceAddress(string iface, AddressFamily family) |
| | | 786 | | { |
| | | 787 | | if (iface.Length == 0) |
| | | 788 | | { |
| | | 789 | | return null; |
| | | 790 | | } |
| | | 791 | | |
| | | 792 | | // |
| | | 793 | | // The iface parameter must either be an IP address, an |
| | | 794 | | // index or the name of an interface. If it's an index we |
| | | 795 | | // just return it. If it's an IP address we search for an |
| | | 796 | | // interface which has this IP address. If it's a name we |
| | | 797 | | // search an interface with this name. |
| | | 798 | | // |
| | | 799 | | |
| | | 800 | | try |
| | | 801 | | { |
| | | 802 | | return IPAddress.Parse(iface); |
| | | 803 | | } |
| | | 804 | | catch (FormatException) |
| | | 805 | | { |
| | | 806 | | } |
| | | 807 | | |
| | | 808 | | NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces(); |
| | | 809 | | try |
| | | 810 | | { |
| | | 811 | | int index = int.Parse(iface, CultureInfo.InvariantCulture); |
| | | 812 | | foreach (NetworkInterface ni in nics) |
| | | 813 | | { |
| | | 814 | | IPInterfaceProperties ipProps = ni.GetIPProperties(); |
| | | 815 | | int interfaceIndex = -1; |
| | | 816 | | if (family == AddressFamily.InterNetwork) |
| | | 817 | | { |
| | | 818 | | IPv4InterfaceProperties ipv4Props = ipProps.GetIPv4Properties(); |
| | | 819 | | if (ipv4Props != null && ipv4Props.Index == index) |
| | | 820 | | { |
| | | 821 | | interfaceIndex = ipv4Props.Index; |
| | | 822 | | } |
| | | 823 | | } |
| | | 824 | | else |
| | | 825 | | { |
| | | 826 | | IPv6InterfaceProperties ipv6Props = ipProps.GetIPv6Properties(); |
| | | 827 | | if (ipv6Props != null && ipv6Props.Index == index) |
| | | 828 | | { |
| | | 829 | | interfaceIndex = ipv6Props.Index; |
| | | 830 | | } |
| | | 831 | | } |
| | | 832 | | if (interfaceIndex >= 0) |
| | | 833 | | { |
| | | 834 | | foreach (UnicastIPAddressInformation a in ipProps.UnicastAddresses) |
| | | 835 | | { |
| | | 836 | | if (a.Address.AddressFamily == family) |
| | | 837 | | { |
| | | 838 | | return a.Address; |
| | | 839 | | } |
| | | 840 | | } |
| | | 841 | | } |
| | | 842 | | } |
| | | 843 | | } |
| | | 844 | | catch (FormatException) |
| | | 845 | | { |
| | | 846 | | } |
| | | 847 | | |
| | | 848 | | foreach (NetworkInterface ni in nics) |
| | | 849 | | { |
| | | 850 | | if (ni.Name == iface) |
| | | 851 | | { |
| | | 852 | | IPInterfaceProperties ipProps = ni.GetIPProperties(); |
| | | 853 | | foreach (UnicastIPAddressInformation a in ipProps.UnicastAddresses) |
| | | 854 | | { |
| | | 855 | | if (a.Address.AddressFamily == family) |
| | | 856 | | { |
| | | 857 | | return a.Address; |
| | | 858 | | } |
| | | 859 | | } |
| | | 860 | | } |
| | | 861 | | } |
| | | 862 | | |
| | | 863 | | throw new ArgumentException("couldn't find interface `" + iface + "'"); |
| | | 864 | | } |
| | | 865 | | |
| | | 866 | | private static int getInterfaceIndex(string iface, AddressFamily family) |
| | | 867 | | { |
| | | 868 | | if (iface.Length == 0) |
| | | 869 | | { |
| | | 870 | | return -1; |
| | | 871 | | } |
| | | 872 | | |
| | | 873 | | // |
| | | 874 | | // The iface parameter must either be an IP address, an |
| | | 875 | | // index or the name of an interface. If it's an index we |
| | | 876 | | // just return it. If it's an IP address we search for an |
| | | 877 | | // interface which has this IP address. If it's a name we |
| | | 878 | | // search an interface with this name. |
| | | 879 | | // |
| | | 880 | | try |
| | | 881 | | { |
| | | 882 | | return int.Parse(iface, CultureInfo.InvariantCulture); |
| | | 883 | | } |
| | | 884 | | catch (FormatException) |
| | | 885 | | { |
| | | 886 | | } |
| | | 887 | | |
| | | 888 | | NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces(); |
| | | 889 | | try |
| | | 890 | | { |
| | | 891 | | var addr = IPAddress.Parse(iface); |
| | | 892 | | foreach (NetworkInterface ni in nics) |
| | | 893 | | { |
| | | 894 | | IPInterfaceProperties ipProps = ni.GetIPProperties(); |
| | | 895 | | foreach (UnicastIPAddressInformation uni in ipProps.UnicastAddresses) |
| | | 896 | | { |
| | | 897 | | if (uni.Address.Equals(addr)) |
| | | 898 | | { |
| | | 899 | | if (addr.AddressFamily == AddressFamily.InterNetwork) |
| | | 900 | | { |
| | | 901 | | IPv4InterfaceProperties ipv4Props = ipProps.GetIPv4Properties(); |
| | | 902 | | if (ipv4Props != null) |
| | | 903 | | { |
| | | 904 | | return ipv4Props.Index; |
| | | 905 | | } |
| | | 906 | | } |
| | | 907 | | else |
| | | 908 | | { |
| | | 909 | | IPv6InterfaceProperties ipv6Props = ipProps.GetIPv6Properties(); |
| | | 910 | | if (ipv6Props != null) |
| | | 911 | | { |
| | | 912 | | return ipv6Props.Index; |
| | | 913 | | } |
| | | 914 | | } |
| | | 915 | | } |
| | | 916 | | } |
| | | 917 | | } |
| | | 918 | | } |
| | | 919 | | catch (FormatException) |
| | | 920 | | { |
| | | 921 | | } |
| | | 922 | | |
| | | 923 | | foreach (NetworkInterface ni in nics) |
| | | 924 | | { |
| | | 925 | | if (ni.Name == iface) |
| | | 926 | | { |
| | | 927 | | IPInterfaceProperties ipProps = ni.GetIPProperties(); |
| | | 928 | | if (family == AddressFamily.InterNetwork) |
| | | 929 | | { |
| | | 930 | | IPv4InterfaceProperties ipv4Props = ipProps.GetIPv4Properties(); |
| | | 931 | | if (ipv4Props != null) |
| | | 932 | | { |
| | | 933 | | return ipv4Props.Index; |
| | | 934 | | } |
| | | 935 | | } |
| | | 936 | | else |
| | | 937 | | { |
| | | 938 | | IPv6InterfaceProperties ipv6Props = ipProps.GetIPv6Properties(); |
| | | 939 | | if (ipv6Props != null) |
| | | 940 | | { |
| | | 941 | | return ipv6Props.Index; |
| | | 942 | | } |
| | | 943 | | } |
| | | 944 | | } |
| | | 945 | | } |
| | | 946 | | |
| | | 947 | | throw new ArgumentException("couldn't find interface `" + iface + "'"); |
| | | 948 | | } |
| | | 949 | | |
| | | 950 | | internal static EndPoint getNumericAddress(string sourceAddress) |
| | | 951 | | { |
| | | 952 | | EndPoint addr = null; |
| | | 953 | | if (!string.IsNullOrEmpty(sourceAddress)) |
| | | 954 | | { |
| | | 955 | | List<EndPoint> addrs = getAddresses( |
| | | 956 | | sourceAddress, |
| | | 957 | | 0, |
| | | 958 | | EnableBoth, |
| | | 959 | | preferIPv6: false, |
| | | 960 | | blocking: false); |
| | | 961 | | if (addrs.Count != 0) |
| | | 962 | | { |
| | | 963 | | return addrs[0]; |
| | | 964 | | } |
| | | 965 | | } |
| | | 966 | | return addr; |
| | | 967 | | } |
| | | 968 | | |
| | | 969 | | private static bool isWildcard(string address, out bool ipv4Wildcard) |
| | | 970 | | { |
| | | 971 | | ipv4Wildcard = false; |
| | | 972 | | if (address.Length == 0) |
| | | 973 | | { |
| | | 974 | | return true; |
| | | 975 | | } |
| | | 976 | | |
| | | 977 | | try |
| | | 978 | | { |
| | | 979 | | var addr = IPAddress.Parse(address); |
| | | 980 | | if (addr.Equals(IPAddress.Any)) |
| | | 981 | | { |
| | | 982 | | ipv4Wildcard = true; |
| | | 983 | | return true; |
| | | 984 | | } |
| | | 985 | | return addr.Equals(IPAddress.IPv6Any); |
| | | 986 | | } |
| | | 987 | | catch (System.Exception) |
| | | 988 | | { |
| | | 989 | | } |
| | | 990 | | |
| | | 991 | | return false; |
| | | 992 | | } |
| | | 993 | | |
| | | 994 | | internal static List<IPAddress> getLoopbackAddresses(int protocol) |
| | | 995 | | { |
| | | 996 | | var addresses = new List<IPAddress>(); |
| | | 997 | | if (protocol != EnableIPv4) |
| | | 998 | | { |
| | | 999 | | addresses.Add(IPAddress.IPv6Loopback); |
| | | 1000 | | } |
| | | 1001 | | if (protocol != EnableIPv6) |
| | | 1002 | | { |
| | | 1003 | | addresses.Add(IPAddress.Loopback); |
| | | 1004 | | } |
| | | 1005 | | return addresses; |
| | | 1006 | | } |
| | | 1007 | | |
| | | 1008 | | internal static bool addressEquals(EndPoint addr1, EndPoint addr2) |
| | | 1009 | | { |
| | | 1010 | | if (addr1 == null) |
| | | 1011 | | { |
| | | 1012 | | if (addr2 == null) |
| | | 1013 | | { |
| | | 1014 | | return true; |
| | | 1015 | | } |
| | | 1016 | | else |
| | | 1017 | | { |
| | | 1018 | | return false; |
| | | 1019 | | } |
| | | 1020 | | } |
| | | 1021 | | else if (addr2 == null) |
| | | 1022 | | { |
| | | 1023 | | return false; |
| | | 1024 | | } |
| | | 1025 | | |
| | | 1026 | | return addr1.Equals(addr2); |
| | | 1027 | | } |
| | | 1028 | | |
| | | 1029 | | internal static string endpointAddressToString(EndPoint endpoint) |
| | | 1030 | | { |
| | | 1031 | | if (endpoint != null) |
| | | 1032 | | { |
| | | 1033 | | if (endpoint is IPEndPoint) |
| | | 1034 | | { |
| | | 1035 | | var ipEndpoint = (IPEndPoint)endpoint; |
| | | 1036 | | return ipEndpoint.Address.ToString(); |
| | | 1037 | | } |
| | | 1038 | | } |
| | | 1039 | | return ""; |
| | | 1040 | | } |
| | | 1041 | | |
| | | 1042 | | internal static int endpointPort(EndPoint endpoint) |
| | | 1043 | | { |
| | | 1044 | | if (endpoint != null) |
| | | 1045 | | { |
| | | 1046 | | if (endpoint is IPEndPoint) |
| | | 1047 | | { |
| | | 1048 | | var ipEndpoint = (IPEndPoint)endpoint; |
| | | 1049 | | return ipEndpoint.Port; |
| | | 1050 | | } |
| | | 1051 | | } |
| | | 1052 | | return -1; |
| | | 1053 | | } |
| | | 1054 | | |
| | | 1055 | | private class EndPointComparator : IComparer<EndPoint> |
| | | 1056 | | { |
| | 1 | 1057 | | public EndPointComparator(bool ipv6) => _ipv6 = ipv6; |
| | | 1058 | | |
| | | 1059 | | public int Compare(EndPoint lhs, EndPoint rhs) |
| | | 1060 | | { |
| | 1 | 1061 | | if (lhs.AddressFamily == AddressFamily.InterNetwork && |
| | 1 | 1062 | | rhs.AddressFamily == AddressFamily.InterNetworkV6) |
| | | 1063 | | { |
| | 0 | 1064 | | return _ipv6 ? 1 : -1; |
| | | 1065 | | } |
| | 1 | 1066 | | else if (lhs.AddressFamily == AddressFamily.InterNetworkV6 && |
| | 1 | 1067 | | rhs.AddressFamily == AddressFamily.InterNetwork) |
| | | 1068 | | { |
| | 1 | 1069 | | return _ipv6 ? -1 : 1; |
| | | 1070 | | } |
| | | 1071 | | else |
| | | 1072 | | { |
| | 1 | 1073 | | return 0; |
| | | 1074 | | } |
| | | 1075 | | } |
| | | 1076 | | |
| | | 1077 | | private readonly bool _ipv6; |
| | | 1078 | | } |
| | | 1079 | | |
| | | 1080 | | private static readonly EndPointComparator _preferIPv4Comparator = new EndPointComparator(false); |
| | | 1081 | | private static readonly EndPointComparator _preferIPv6Comparator = new EndPointComparator(true); |
| | | 1082 | | } |