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                         struct addrinfo* addr = list;
 206                         while (addr != 0)
 207                         {
 208                                 resolved.push_back(SocketAddress(addr, name));
 209                                 addr = addr->ai_next;
 210                         }
 211
 212                         freeaddrinfo(list);
 213                 }
 214                 else
 215                 {
 216                         Mf::logWarning(gai_strerror(status));
 217                 }
 218
 219                 return 0;
 220         }
 221
 222
 223 private:
 224
 225         void setNameFromAddress()
 226         {
 227 #if defined(_WIN32)
 228                 // inet_ntop was introduced in Vista
 229                 mName = inet_ntoa(mAddress.v4.sin_addr);
 230 #else
 231                 char name[INET6_ADDRSTRLEN] = {'\0'};
 232                 inet_ntop(mAddress.sa.sa_family, &mAddress.sa, name, sizeof(name));
 233                 mName = name;
 234 #endif
 235         }
 236
 237
 238         union
 239         {
 240                 sockaddr                        sa;
 241                 sockaddr_in                     v4;
 242                 sockaddr_in6            v6;
 243                 sockaddr_storage        storage;
 244         }                       mAddress;
 245         size_t          mSize;
 246         std::string     mName;
 247         int                     mType;
 248 };
 249
 250
 251 class Socket
 252 {
 253 public:
 254
 255         Socket(const SocketAddress& address) :
 256                 mFd(-1),
 257                 mAddress(address)
 258         {
 259                 mFd = socket(address.family(), address.type(), 0);
 260         }
 261
 262         ~Socket()
 263         {
 264 #if defined(_WIN32)
 265                 if (mFd != -1) closesocket(mFd);
 266 #else
 267                 if (mFd != -1) close(mFd);
 268 #endif
 269         }
 270
 271
 272         bool isConnected() const
 273         {
 274                 return mFd != -1;
 275         }
 276
 277         const SocketAddress& address() const
 278         {
 279                 return mAddress;
 280         }
 281
 282
 283         int connect()
 284         {
 285                 return ::connect(mFd, mAddress.address(), mAddress.size());
 286         }
 287
 288         int bind()
 289         {
 290                 return ::bind(mFd, mAddress.address(), mAddress.size());
 291         }
 292
 293         int listen(int backlog = SOMAXCONN)
 294         {
 295                 return ::listen(mFd, backlog > 0 ? backlog : SOMAXCONN);
 296         }
 297
 298         Socket accept()
 299         {
 300                 return Socket(mFd);
 301         }
 302
 303
 304         int set(int option, int value = 0)
 305         {
 306                 if (option == SO_NONBLOCK)
 307                 {
 308 #ifdef HAVE_FCNTL
 309                         int flags = fcntl(mFd, F_GETFL);
 310                         return fcntl(mFd, F_SETFL, (value ? O_NONBLOCK : 0) | flags);
 311 #else
 312                         return ioctl(mFd, FIONBIO, value);
 313 #endif
 314                 }
 315                 return setsockopt(mFd, SOL_SOCKET, option, &value, sizeof(value));
 316         }
 317
 318         int set(int option, const std::string& value)
 319         {
 320                 return setsockopt(mFd, SOL_SOCKET, option,
 321                                 value.c_str(), value.length());
 322         }
 323
 324         int get(int option, int& value)
 325         {
 326                 if (option == SO_NONBLOCK)
 327                 {
 328 #ifdef HAVE_FCNTL
 329                         int flags = fcntl(mFd, F_GETFL);
 330                         return flags & O_NONBLOCK;
 331 #else
 332                         return ioctl(mFd, FIONBIO, &value);
 333 #endif
 334                 }
 335                 socklen_t optlen = sizeof(value);
 336                 return getsockopt(mFd, SOL_SOCKET, option, &value, &optlen);
 337         }
 338
 339         int get(int option, std::string& value)
 340         {
 341                 char str[64] = {'\0'};
 342                 socklen_t optlen = sizeof(str);
 343                 int result = getsockopt(mFd, SOL_SOCKET, option, &str, &optlen);
 344                 value = str;
 345                 return result;
 346         }
 347
 348         void write(const Packet& packet)
 349         {
 350                 write(mAddress, packet);
 351         }
 352
 353         void write(const SocketAddress& address, const Packet& packet)
 354         {
 355                 sendto(mFd, packet.bytes(), packet.size(), 0,
 356                                 address.address(), address.size());
 357         }
 358
 359         Packet read()
 360         {
 361                 char buffer[1024];
 362                 int size = recv(mFd, buffer, sizeof(buffer), 0);
 363
 364                 return Packet(buffer, size);
 365         }
 366
 367         Packet read(SocketAddress& address)
 368         {
 369                 union
 370                 {
 371                         sockaddr                        sa;
 372                         sockaddr_storage        storage;
 373                 } addr;
 374                 socklen_t length = sizeof(addr);
 375
 376                 char buffer[1024];
 377                 int size = recvfrom(mFd, buffer, sizeof(buffer), 0,
 378                                 &addr.sa, &length);
 379
 380                 address = SocketAddress(&addr.sa, length, mAddress.type());
 381                 return Packet(buffer, size);
 382         }
 383
 384
 385 private:
 386
 387         Socket(int fd)
 388         {
 389                 // for accepting a socket from fd
 390                 union
 391                 {
 392                         sockaddr                        sa;
 393                         sockaddr_storage        storage;
 394                 } addr;
 395                 socklen_t length = sizeof(addr);
 396
 397                 mFd = ::accept(fd, &addr.sa, &length);
 398                 mAddress = SocketAddress(&addr.sa, length);
 399         }
 400
 401
 402         int                             mFd;
 403         SocketAddress   mAddress;
 404 };
 405
 406
 407 class ResolverTask : public ThreadedTask
 408 {
 409 public:
 410
 411         ResolverTask(const std::string& service, const std::string& name,
 412                         int type = SOCK_STREAM, int family = AF_UNSPEC) :
 413                 mIsDone(false)
 414         {
 415                 mFunction = boost::bind(&ResolverTask::resolve,
 416                                 this, service, name, type, family);
 417         }
 418
 419
 420         bool isDone() const
 421         {
 422                 return mIsDone;
 423         }
 424
 425         void run()
 426         {
 427                 if (!mThread) mThread = Mf::detachFunction(mFunction);
 428         }
 429
 430
 431         const std::vector<SocketAddress>& addresses() const
 432         {
 433                 return mAddressList;
 434         }
 435
 436
 437 private:
 438
 439         int resolve(const std::string& service, const std::string& name,
 440                         int type, int family)
 441         {
 442                 int status = SocketAddress::resolve(service, name,
 443                                 type, family, mAddressList);
 444                 mIsDone = true;
 445                 return status;
 446         }
 447
 448
 449         std::vector<SocketAddress>      mAddressList;
 450         bool                                            mIsDone;
 451         Function                                        mFunction;
 452 };
 453
 454
 455 } // namespace Mf
 456
 457 #endif // _MOOF_SOCKET_HH_
 458