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 <cstring>
  16 #include <sstream>
  17 #include <string>
  18 #include <vector>
  19
  20 #if defined(_WIN32)
  21 #include <winsock2.h>
  22 #include <ws2tcpip.h>
  23 #include <wspiapi.h>
  24 #else
  25 #include <arpa/inet.h>
  26 #include <netdb.h>
  27 #include <sys/socket.h>
  28 #include <sys/types.h>
  29 #if HAVE_FCNTL_H
  30 #include <fcntl.h>
  31 #else
  32 #include <sys/ioctl.h>
  33 #endif
  34 #endif
  35
  36 #include <Moof/Log.hh>
  37 #include <Moof/Packet.hh>
  38 #include <Moof/Thread.hh>
  39
  40
  41 #ifndef SO_NONBLOCK
  42 #define SO_NONBLOCK 1024
  43 #endif
  44
  45
  46 namespace Mf {
  47
  48
  49 class SocketAddress
  50 {
  51 public:
  52
  53         SocketAddress() :
  54                 mSize(0),
  55                 mType(0)
  56         {
  57                 mAddress.sa.sa_family = AF_UNSPEC;
  58                 mAddress.v4.sin_port = 0;
  59         }
  60
  61         SocketAddress(const std::string& service, const std::string& name,
  62                         int type = SOCK_STREAM, int family = AF_UNSPEC)
  63         {
  64                 init(service, name, type, family);
  65         }
  66
  67         SocketAddress(const std::string& service,
  68                         int type = SOCK_STREAM, int family = AF_UNSPEC)
  69         {
  70                 init(service, type, family);
  71         }
  72
  73         SocketAddress(const struct addrinfo* addr, const std::string& name)
  74         {
  75                 mType = addr->ai_socktype;
  76                 memcpy(&mAddress.sa, addr->ai_addr, addr->ai_addrlen);
  77                 mName = name;
  78                 mSize = addr->ai_addrlen;
  79         }
  80
  81         SocketAddress(const struct sockaddr* addr, size_t size,
  82                         int type = SOCK_STREAM)
  83         {
  84                 mType = type;
  85                 memcpy(&mAddress.sa, addr, size);
  86                 mSize = size;
  87                 setNameFromAddress();
  88         }
  89
  90
  91         static SocketAddress broadcast(const std::string& service)
  92         {
  93                 std::istringstream stream(service);
  94                 unsigned short port;
  95                 stream >> port;
  96
  97                 struct sockaddr_in addr;
  98                 addr.sin_family = AF_INET;
  99                 addr.sin_port = htons(port);
 100                 addr.sin_addr.s_addr = INADDR_BROADCAST;
 101                 memset(&addr.sin_zero, 0, sizeof(addr.sin_zero));
 102                 return SocketAddress((sockaddr*)&addr, sizeof(addr), SOCK_DGRAM);
 103         }
 104
 105
 106         void init(const std::string& service, const std::string& name = "",
 107                         int type = SOCK_STREAM, int family = AF_UNSPEC)
 108         {
 109                 ASSERT(type == SOCK_STREAM || type == SOCK_DGRAM);
 110                 ASSERT(family == AF_INET || family == AF_INET6 || family == AF_UNSPEC);
 111
 112                 struct addrinfo hints;
 113                 memset(&hints, 0, sizeof(hints));
 114                 hints.ai_family = family;
 115                 hints.ai_socktype = type;
 116                 hints.ai_flags = AI_PASSIVE;
 117
 118                 struct addrinfo* addr;
 119                 int status = getaddrinfo(name.length() > 0 ? name.c_str() : 0,
 120                                 service.c_str(), &hints, &addr);
 121                 if (status == 0)
 122                 {
 123                         mType = addr->ai_socktype;
 124                         memcpy(&mAddress.sa, addr->ai_addr, addr->ai_addrlen);
 125                         mSize = addr->ai_addrlen;
 126
 127                         if (name != "") mName = name;
 128                         else            setNameFromAddress();
 129
 130                         freeaddrinfo(addr);
 131                 }
 132                 else
 133                 {
 134                         Mf::logWarning(gai_strerror(status));
 135                         mType = 0;
 136                         mSize = 0;
 137                         mAddress.sa.sa_family = AF_UNSPEC;
 138                         mAddress.v4.sin_port = 0;
 139                 }
 140         }
 141
 142         void init(const std::string& service,
 143                         int type = SOCK_STREAM, int family = AF_UNSPEC)
 144         {
 145                 init(service, "", type, family);
 146         }
 147
 148
 149         const std::string& name() const
 150         {
 151                 return mName;
 152         }
 153
 154         void setName(const std::string& name)
 155         {
 156                 mName = name;
 157         }
 158
 159         unsigned short port() const
 160         {
 161                 return ntohs(mAddress.v4.sin_port);
 162         }
 163
 164         int type() const
 165         {
 166                 return mType;
 167         }
 168
 169         int family() const
 170         {
 171                 return mAddress.sa.sa_family;
 172         }
 173
 174
 175         const struct sockaddr* address() const
 176         {
 177                 return mSize != 0 ? &mAddress.sa : 0;
 178         }
 179
 180         size_t size() const
 181         {
 182                 return mSize;
 183         }
 184
 185
 186         static int resolve(const std::string& service, const std::string& name,
 187                         int type, int family, std::vector<SocketAddress>& resolved)
 188         {
 189                 ASSERT(type == SOCK_STREAM || type == SOCK_DGRAM);
 190                 ASSERT(family == AF_INET || family == AF_INET6 || family == AF_UNSPEC);
 191
 192                 resolved.clear();
 193
 194                 struct addrinfo hints;
 195                 memset(&hints, 0, sizeof(hints));
 196                 hints.ai_family = family;
 197                 hints.ai_socktype = type;
 198                 hints.ai_flags = AI_PASSIVE;
 199
 200                 struct addrinfo* list;
 201                 int status = getaddrinfo(name.length() > 0 ? name.c_str() : 0,
 202                                 service.length() > 0 ? service.c_str() : 0, &hints, &list);
 203                 if (status == 0)
 204                 {
 205                         for (struct addrinfo* addr = list;
 206                                         addr != 0; addr = addr->ai_next)
 207                         {
 208                                 resolved.push_back(SocketAddress(addr, name));
 209                         }
 210
 211                         freeaddrinfo(list);
 212                 }
 213                 else
 214                 {
 215                         Mf::logWarning(gai_strerror(status));
 216                 }
 217
 218                 return 0;
 219         }
 220
 221
 222 private:
 223
 224         void setNameFromAddress()
 225         {
 226 #if defined(_WIN32)
 227                 // inet_ntop was introduced in Vista
 228                 mName = inet_ntoa(mAddress.v4.sin_addr);
 229 #else
 230                 char name[INET6_ADDRSTRLEN] = {'\0'};
 231                 inet_ntop(mAddress.sa.sa_family, &mAddress.sa, name, sizeof(name));
 232                 mName = name;
 233 #endif
 234         }
 235
 236
 237         union
 238         {
 239                 sockaddr                        sa;
 240                 sockaddr_in                     v4;
 241                 sockaddr_in6            v6;
 242                 sockaddr_storage        storage;
 243         }                       mAddress;
 244         size_t          mSize;
 245         std::string     mName;
 246         int                     mType;
 247 };
 248
 249
 250 class Socket
 251 {
 252 public:
 253
 254         Socket(const SocketAddress& address) :
 255                 mFd(-1),
 256                 mAddress(address)
 257         {
 258                 mFd = socket(address.family(), address.type(), 0);
 259         }
 260
 261         ~Socket()
 262         {
 263 #if defined(_WIN32)
 264                 if (mFd != -1) closesocket(mFd);
 265 #else
 266                 if (mFd != -1) close(mFd);
 267 #endif
 268         }
 269
 270
 271         bool isConnected() const
 272         {
 273                 return mFd != -1;
 274         }
 275
 276         const SocketAddress& address() const
 277         {
 278                 return mAddress;
 279         }
 280
 281
 282         int connect()
 283         {
 284                 return ::connect(mFd, mAddress.address(), mAddress.size());
 285         }
 286
 287         int bind()
 288         {
 289                 return ::bind(mFd, mAddress.address(), mAddress.size());
 290         }
 291
 292         int listen(int backlog = SOMAXCONN)
 293         {
 294                 return ::listen(mFd, backlog > 0 ? backlog : SOMAXCONN);
 295         }
 296
 297         Socket accept()
 298         {
 299                 return Socket(mFd);
 300         }
 301
 302
 303         int set(int option, int value = 0)
 304         {
 305                 if (option == SO_NONBLOCK)
 306                 {
 307 #ifdef HAVE_FCNTL
 308                         int flags = fcntl(mFd, F_GETFL);
 309                         return fcntl(mFd, F_SETFL, (value ? O_NONBLOCK : 0) | flags);
 310 #else
 311                         return ioctl(mFd, FIONBIO, value);
 312 #endif
 313                 }
 314                 return setsockopt(mFd, SOL_SOCKET, option, &value, sizeof(value));
 315         }
 316
 317         int set(int option, const std::string& value)
 318         {
 319                 return setsockopt(mFd, SOL_SOCKET, option,
 320                                 value.c_str(), value.length());
 321         }
 322
 323         int get(int option, int& value)
 324         {
 325                 if (option == SO_NONBLOCK)
 326                 {
 327 #ifdef HAVE_FCNTL
 328                         int flags = fcntl(mFd, F_GETFL);
 329                         return flags & O_NONBLOCK;
 330 #else
 331                         return ioctl(mFd, FIONBIO, &value);
 332 #endif
 333                 }
 334                 socklen_t optlen = sizeof(value);
 335                 return getsockopt(mFd, SOL_SOCKET, option, &value, &optlen);
 336         }
 337
 338         int get(int option, std::string& value)
 339         {
 340                 char str[64] = {'\0'};
 341                 socklen_t optlen = sizeof(str);
 342                 int result = getsockopt(mFd, SOL_SOCKET, option, &str, &optlen);
 343                 value = str;
 344                 return result;
 345         }
 346
 347         void write(const Packet& packet)
 348         {
 349                 write(mAddress, packet);
 350         }
 351
 352         void write(const SocketAddress& address, const Packet& packet)
 353         {
 354                 sendto(mFd, packet.bytes(), packet.size(), 0,
 355                                 address.address(), address.size());
 356         }
 357
 358         Packet read()
 359         {
 360                 char buffer[1024];
 361                 int size = recv(mFd, buffer, sizeof(buffer), 0);
 362
 363                 return Packet(buffer, size);
 364         }
 365
 366         Packet read(SocketAddress& address)
 367         {
 368                 union
 369                 {
 370                         sockaddr                        sa;
 371                         sockaddr_storage        storage;
 372                 } addr;
 373                 socklen_t length = sizeof(addr);
 374
 375                 char buffer[1024];
 376                 int size = recvfrom(mFd, buffer, sizeof(buffer), 0,
 377                                 &addr.sa, &length);
 378
 379                 address = SocketAddress(&addr.sa, length, mAddress.type());
 380                 return Packet(buffer, size);
 381         }
 382
 383
 384 private:
 385
 386         Socket(int fd)
 387         {
 388                 // for accepting a socket from fd
 389                 union
 390                 {
 391                         sockaddr                        sa;
 392                         sockaddr_storage        storage;
 393                 } addr;
 394                 socklen_t length = sizeof(addr);
 395
 396                 mFd = ::accept(fd, &addr.sa, &length);
 397                 mAddress = SocketAddress(&addr.sa, length);
 398         }
 399
 400
 401         int                             mFd;
 402         SocketAddress   mAddress;
 403 };
 404
 405
 406 class ResolverTask : public ThreadedTask
 407 {
 408 public:
 409
 410         ResolverTask(const std::string& service, const std::string& name,
 411                         int type = SOCK_STREAM, int family = AF_UNSPEC) :
 412                 mIsDone(false)
 413         {
 414                 mFunction = boost::bind(&ResolverTask::resolve,
 415                                 this, service, name, type, family);
 416         }
 417
 418
 419         bool isDone() const
 420         {
 421                 return mIsDone;
 422         }
 423
 424         void run()
 425         {
 426                 if (!mThread) mThread = Mf::detachFunction(mFunction);
 427         }
 428
 429
 430         const std::vector<SocketAddress>& addresses() const
 431         {
 432                 return mAddressList;
 433         }
 434
 435
 436 private:
 437
 438         int resolve(const std::string& service, const std::string& name,
 439                         int type, int family)
 440         {
 441                 int status = SocketAddress::resolve(service, name,
 442                                 type, family, mAddressList);
 443                 mIsDone = true;
 444                 return status;
 445         }
 446
 447
 448         std::vector<SocketAddress>      mAddressList;
 449         bool                                            mIsDone;
 450         Function                                        mFunction;
 451 };
 452
 453
 454 } // namespace Mf
 455
 456 #endif // _MOOF_SOCKET_HH_
 457