Dogcows Code - chaz/yoink/blob - src/Moof/Socket.hh

   1
   2 /*]  Copyright (c) 2009-2010, Charles McGarvey  [**************************
   3 **]  All rights reserved.
   4 *
   5 * vi:ts=4 sw=4 tw=75
   6 *
   7 * Distributable under the terms and conditions of the 2-clause BSD license;
   8 * see the file COPYING for a complete text of the license.
   9 *
  10 **************************************************************************/
  11
  12 #ifndef _MOOF_SOCKET_HH_
  13 #define _MOOF_SOCKET_HH_
  14
  15 #include <algorithm>
  16 #include <cstring>
  17 #include <sstream>
  18 #include <string>
  19 #include <vector>
  20
  21 #if defined(_WIN32)
  22 #include <winsock2.h>
  23 #include <ws2tcpip.h>
  24 #include <wspiapi.h>
  25 #else
  26 #include <arpa/inet.h>
  27 #include <netdb.h>
  28 #include <sys/socket.h>
  29 #include <sys/types.h>
  30 #if HAVE_FCNTL_H
  31 #include <fcntl.h>
  32 #else
  33 #include <sys/ioctl.h>
  34 #endif
  35 #endif
  36
  37 #include <Moof/Log.hh>
  38 #include <Moof/Packet.hh>
  39 #include <Moof/Thread.hh>
  40
  41
  42 #ifndef SO_NONBLOCK
  43 #define SO_NONBLOCK 1024
  44 #endif
  45
  46
  47 namespace Mf {
  48
  49
  50 class SocketAddress
  51 {
  52 public:
  53
  54         SocketAddress() :
  55                 mSize(0),
  56                 mType(0)
  57         {
  58                 mAddr.sa.sa_family = AF_UNSPEC;
  59                 mAddr.in.sin_port = 0;
  60         }
  61
  62         SocketAddress(const std::string& service, const std::string& name,
  63                         int type = SOCK_STREAM, int family = AF_UNSPEC)
  64         {
  65                 init(service, name, type, family);
  66         }
  67
  68         SocketAddress(const std::string& service,
  69                         int type = SOCK_STREAM, int family = AF_UNSPEC)
  70         {
  71                 init(service, type, family);
  72         }
  73
  74         SocketAddress(const struct addrinfo* addr, const std::string& name)
  75         {
  76                 mType = addr->ai_socktype;
  77                 memcpy(&mAddr.sa, addr->ai_addr, addr->ai_addrlen);
  78                 mName = name;
  79                 mSize = addr->ai_addrlen;
  80         }
  81
  82         SocketAddress(const struct sockaddr* addr, size_t size,
  83                         int type = SOCK_STREAM)
  84         {
  85                 mType = type;
  86                 memcpy(&mAddr.sa, addr, size);
  87                 mSize = size;
  88                 setNameFromAddress();
  89         }
  90
  91
  92         static SocketAddress broadcast(const std::string& service)
  93         {
  94                 std::istringstream stream(service);
  95                 unsigned short port;
  96                 stream >> port;
  97
  98                 struct sockaddr_in addr;
  99                 addr.sin_family = AF_INET;
 100                 addr.sin_port = htons(port);
 101                 addr.sin_addr.s_addr = INADDR_BROADCAST;
 102                 memset(&addr.sin_zero, 0, sizeof(addr.sin_zero));
 103                 return SocketAddress((sockaddr*)&addr, sizeof(addr), SOCK_DGRAM);
 104         }
 105
 106
 107         void init(const std::string& service, const std::string& name = "",
 108                         int type = SOCK_STREAM, int family = AF_UNSPEC)
 109         {
 110                 ASSERT(type == SOCK_STREAM || type == SOCK_DGRAM);
 111                 ASSERT(family == AF_INET || family == AF_INET6 || family == AF_UNSPEC);
 112
 113                 struct addrinfo hints;
 114                 memset(&hints, 0, sizeof(hints));
 115                 hints.ai_family = family;
 116                 hints.ai_socktype = type;
 117                 hints.ai_flags = AI_PASSIVE;
 118
 119                 struct addrinfo* addr;
 120                 int status = getaddrinfo(name.length() > 0 ? name.c_str() : 0,
 121                                 service.c_str(), &hints, &addr);
 122                 if (status == 0)
 123                 {
 124                         mType = addr->ai_socktype;
 125                         memcpy(&mAddr.sa, addr->ai_addr, addr->ai_addrlen);
 126                         mSize = addr->ai_addrlen;
 127
 128                         if (name != "") mName = name;
 129                         else            setNameFromAddress();
 130
 131                         freeaddrinfo(addr);
 132                 }
 133                 else
 134                 {
 135                         Mf::logWarning(gai_strerror(status));
 136                         mType = 0;
 137                         mSize = 0;
 138                         mAddr.sa.sa_family = AF_UNSPEC;
 139                         mAddr.in.sin_port = 0;
 140                 }
 141         }
 142
 143         void init(const std::string& service,
 144                         int type = SOCK_STREAM, int family = AF_UNSPEC)
 145         {
 146                 init(service, "", type, family);
 147         }
 148
 149
 150         const std::string& name() const
 151         {
 152                 return mName;
 153         }
 154
 155         void setName(const std::string& name)
 156         {
 157                 mName = name;
 158         }
 159
 160         unsigned short port() const
 161         {
 162                 return ntohs(mAddr.in.sin_port);
 163         }
 164
 165         int type() const
 166         {
 167                 return mType;
 168         }
 169
 170         int family() const
 171         {
 172                 return mAddr.sa.sa_family;
 173         }
 174
 175
 176         const struct sockaddr* address() const
 177         {
 178                 return mSize != 0 ? &mAddr.sa : 0;
 179         }
 180
 181         size_t size() const
 182         {
 183                 return mSize;
 184         }
 185
 186
 187         static int resolve(const std::string& service, const std::string& name,
 188                         int type, int family, std::vector<SocketAddress>& resolved)
 189         {
 190                 ASSERT(type == SOCK_STREAM || type == SOCK_DGRAM);
 191                 ASSERT(family == AF_INET || family == AF_INET6 || family == AF_UNSPEC);
 192
 193                 resolved.clear();
 194
 195                 struct addrinfo hints;
 196                 memset(&hints, 0, sizeof(hints));
 197                 hints.ai_family = family;
 198                 hints.ai_socktype = type;
 199                 hints.ai_flags = AI_PASSIVE;
 200
 201                 struct addrinfo* list;
 202                 int status = getaddrinfo(name.length() > 0 ? name.c_str() : 0,
 203                                 service.length() > 0 ? service.c_str() : 0, &hints, &list);
 204                 if (status == 0)
 205                 {
 206                         for (struct addrinfo* addr = list;
 207                                         addr != 0; addr = addr->ai_next)
 208                         {
 209                                 resolved.push_back(SocketAddress(addr, name));
 210                         }
 211
 212                         freeaddrinfo(list);
 213                 }
 214                 else
 215                 {
 216                         Mf::logWarning(gai_strerror(status));
 217                         return -1;
 218                 }
 219
 220                 return 0;
 221         }
 222
 223
 224 private:
 225
 226         void setNameFromAddress()
 227         {
 228 #if defined(_WIN32)
 229                 // inet_ntop was introduced in Vista
 230                 mName = inet_ntoa(mAddr.in.sin_addr);
 231 #else
 232                 char name[INET6_ADDRSTRLEN] = {'\0'};
 233                 inet_ntop(mAddr.sa.sa_family, &mAddr.sa, name, sizeof(name));
 234                 mName = name;
 235 #endif
 236         }
 237
 238
 239         union
 240         {
 241                 sockaddr                        sa;
 242                 sockaddr_in                     in;
 243                 sockaddr_storage        storage;
 244         }                       mAddr;
 245         size_t          mSize;
 246         std::string     mName;
 247         int                     mType;
 248 };
 249
 250
 251 class Socket
 252 {
 253         struct Impl
 254         {
 255                 int                             fd;
 256                 bool                    isConnected;
 257                 SocketAddress   address;
 258         };
 259
 260
 261 public:
 262
 263         Socket() :
 264                 mFd(-1),
 265                 mIsConnected(false) {}
 266
 267         Socket(const SocketAddress& address) :
 268                 mFd(-1),
 269                 mIsConnected(false),
 270                 mAddress(address) {}
 271
 272         Socket(const std::string& service, const std::string& name,
 273                         int type = SOCK_STREAM, int family = AF_UNSPEC) :
 274                 mFd(-1),
 275                 mIsConnected(false),
 276                 mAddress(SocketAddress(service, name, type, family)) {}
 277
 278         Socket(const std::string& service,
 279                         int type = SOCK_STREAM, int family = AF_UNSPEC) :
 280                 mFd(-1),
 281                 mIsConnected(false),
 282                 mAddress(SocketAddress(service, type, family)) {}
 283
 284
 285         Socket(Socket& move) :
 286                 mFd(move.mFd),
 287                 mIsConnected(move.mIsConnected),
 288                 mAddress(move.mAddress)
 289         {
 290                 move.mFd = -1;
 291                 move.mIsConnected = false;
 292         }
 293
 294         Socket(Impl move) :
 295                 mFd(move.fd),
 296                 mIsConnected(move.isConnected),
 297                 mAddress(move.address) {}
 298
 299         Socket& operator=(Socket& move)
 300         {
 301 #if defined(_WIN32)
 302                 if (mFd != -1) closesocket(mFd);
 303 #else
 304                 if (mFd != -1) close(mFd);
 305 #endif
 306                 mFd = move.mFd;
 307                 mIsConnected = move.mIsConnected;
 308                 mAddress = move.mAddress;
 309                 move.mFd = -1;
 310                 move.mIsConnected = false;
 311                 return *this;
 312         }
 313
 314         Socket& operator=(Impl move)
 315         {
 316 #if defined(_WIN32)
 317                 if (mFd != -1) closesocket(mFd);
 318 #else
 319                 if (mFd != -1) close(mFd);
 320 #endif
 321                 mFd = move.fd;
 322                 mIsConnected = move.isConnected;
 323                 mAddress = move.address;
 324                 return *this;
 325         }
 326
 327         operator Impl()
 328         {
 329                 Impl impl;
 330                 impl.fd = mFd;
 331                 impl.isConnected = mIsConnected;
 332                 impl.address = mAddress;
 333                 mFd = -1;
 334                 mIsConnected = false;
 335                 return impl;
 336         }
 337
 338
 339         ~Socket()
 340         {
 341 #if defined(_WIN32)
 342                 if (mFd != -1) closesocket(mFd);
 343 #else
 344                 if (mFd != -1) close(mFd);
 345 #endif
 346         }
 347
 348
 349         bool isConnected() const
 350         {
 351                 return mIsConnected;
 352         }
 353
 354         const SocketAddress& address() const
 355         {
 356                 return mAddress;
 357         }
 358
 359
 360         int connect()
 361         {
 362                 if (mFd == -1) mFd = socket(mAddress.family(), mAddress.type(), 0);
 363                 int result = ::connect(mFd, mAddress.address(), mAddress.size());
 364                 mIsConnected = result != -1;
 365                 return result;
 366         }
 367
 368         int bind()
 369         {
 370                 if (mFd == -1) mFd = socket(mAddress.family(), mAddress.type(), 0);
 371                 return ::bind(mFd, mAddress.address(), mAddress.size());
 372         }
 373
 374         int listen(int backlog = SOMAXCONN)
 375         {
 376                 return ::listen(mFd, backlog > 0 ? backlog : SOMAXCONN);
 377         }
 378
 379         int accept(Socket& socket)
 380         {
 381                 Socket temp = Socket(mFd);
 382                 if (temp.mFd != -1)
 383                 {
 384                         socket = temp;
 385                         return socket.mFd;
 386                 }
 387                 return -1;
 388         }
 389
 390
 391         int set(int option, int value = 0)
 392         {
 393                 if (option == SO_NONBLOCK)
 394                 {
 395 #ifdef HAVE_FCNTL
 396                         int flags = fcntl(mFd, F_GETFL);
 397                         return fcntl(mFd, F_SETFL, (value ? O_NONBLOCK : 0) | flags);
 398 #else
 399                         return ioctl(mFd, FIONBIO, value);
 400 #endif
 401                 }
 402                 return setsockopt(mFd, SOL_SOCKET, option, &value, sizeof(value));
 403         }
 404
 405         int set(int option, const std::string& value)
 406         {
 407                 return setsockopt(mFd, SOL_SOCKET, option,
 408                                 value.data(), value.length());
 409         }
 410
 411         int get(int option, int& value)
 412         {
 413                 if (option == SO_NONBLOCK)
 414                 {
 415 #ifdef HAVE_FCNTL
 416                         int flags = fcntl(mFd, F_GETFL);
 417                         return flags & O_NONBLOCK;
 418 #else
 419                         return ioctl(mFd, FIONBIO, &value);
 420 #endif
 421                 }
 422                 socklen_t optlen = sizeof(value);
 423                 return getsockopt(mFd, SOL_SOCKET, option, &value, &optlen);
 424         }
 425
 426         int get(int option, std::string& value)
 427         {
 428                 char str[64] = {'\0'};
 429                 socklen_t optlen = sizeof(str);
 430                 int result = getsockopt(mFd, SOL_SOCKET, option, &str, &optlen);
 431                 value = str;
 432                 return result;
 433         }
 434
 435
 436         ssize_t write(const void* bytes, size_t size)
 437         {
 438                 return send(mFd, bytes, size, 0);
 439         }
 440         ssize_t write(const void* bytes, size_t size,
 441                 const SocketAddress& address)
 442         {
 443                 return sendto(mFd, bytes, size, 0,
 444                         address.address(), address.size());
 445         }
 446
 447         ssize_t write(const Packet& packet)
 448         {
 449                 return write(packet.bytes(), packet.size());
 450         }
 451
 452         ssize_t write(const Packet& packet, const SocketAddress& address)
 453         {
 454                 return write(packet.bytes(), packet.size(), address);
 455         }
 456
 457
 458         ssize_t read(void* bytes, size_t size)
 459         {
 460                 return recv(mFd, bytes, size, 0);
 461         }
 462
 463         ssize_t read(void* bytes, size_t size, SocketAddress& address)
 464         {
 465                 union
 466                 {
 467                         sockaddr                        sa;
 468                         sockaddr_storage        storage;
 469                 } addr;
 470                 socklen_t length = sizeof(addr);
 471
 472                 ssize_t result = recvfrom(mFd, bytes, size, 0, &addr.sa, &length);
 473                 if (result != -1)
 474                 {
 475                         address = SocketAddress(&addr.sa, length, mAddress.type());
 476                 }
 477                 return result;
 478         }
 479
 480         ssize_t read(Packet& packet)
 481         {
 482                 char buffer[65536];
 483                 ssize_t result = read(buffer, sizeof(buffer));
 484                 if (result != -1) packet = Packet(buffer, result);
 485                 return result;
 486         }
 487
 488         ssize_t read(Packet& packet, SocketAddress& address)
 489         {
 490                 char buffer[65536];
 491                 ssize_t result = read(buffer, sizeof(buffer), address);
 492                 if (result != -1) packet = Packet(buffer, result);
 493                 return result;
 494         }
 495
 496
 497 private:
 498
 499         Socket(int fd)
 500         {
 501                 // for accepting a socket from fd
 502                 union
 503                 {
 504                         sockaddr                        sa;
 505                         sockaddr_storage        storage;
 506                 } addr;
 507                 socklen_t length = sizeof(addr);
 508
 509                 mFd = ::accept(fd, &addr.sa, &length);
 510                 if (mFd != -1)
 511                 {
 512                         mIsConnected = true;
 513                         mAddress = SocketAddress(&addr.sa, length);
 514                 }
 515         }
 516
 517
 518         int                             mFd;
 519         bool                    mIsConnected;
 520         SocketAddress   mAddress;
 521 };
 522
 523
 524 class ResolverTask : public ThreadedTask
 525 {
 526 public:
 527
 528         ResolverTask(const std::string& service, const std::string& name,
 529                         int type = SOCK_STREAM, int family = AF_UNSPEC) :
 530                 mIsDone(false)
 531         {
 532                 mFunction = boost::bind(&ResolverTask::resolve,
 533                                 this, service, name, type, family);
 534         }
 535
 536
 537         bool isDone() const
 538         {
 539                 return mIsDone;
 540         }
 541
 542         void run()
 543         {
 544                 if (!mThread) mThread = Mf::detachFunction(mFunction);
 545         }
 546
 547
 548         const std::vector<SocketAddress>& addresses() const
 549         {
 550                 return mAddressList;
 551         }
 552
 553
 554 private:
 555
 556         int resolve(const std::string& service, const std::string& name,
 557                         int type, int family)
 558         {
 559                 int status = SocketAddress::resolve(service, name,
 560                                 type, family, mAddressList);
 561                 mIsDone = true;
 562                 return status;
 563         }
 564
 565
 566         std::vector<SocketAddress>      mAddressList;
 567         bool                                            mIsDone;
 568         Function                                        mFunction;
 569 };
 570
 571
 572 } // namespace Mf
 573
 574 #endif // _MOOF_SOCKET_HH_
 575