source/socket.cpp

   1 #ifndef WIN32
   2 #include <cerrno>
   3 #include <fcntl.h>
   4 #include <sys/socket.h>
   5 #endif
   6 #include <iostream>
   7 #include <msp/core/systemerror.h>
   8 #include <msp/io/handle_private.h>
   9 #include <msp/strings/format.h>
  10 #include <msp/time/rawtime_private.h>
  11 #include <msp/time/units.h>
  12 #include "socket.h"
  13 #include "socket_private.h"
  14
  15 namespace {
  16
  17 #ifdef WIN32
  18 class WinSockHelper
  19 {
  20 public:
  21         WinSockHelper()
  22         {
  23                 WSADATA wsa_data;
  24                 int err = WSAStartup(0x0002, &wsa_data);
  25                 if(err)
  26                         std::cerr<<"Failed to initialize WinSock: "<<err<<'\n';
  27         }
  28
  29         ~WinSockHelper()
  30         {
  31                 WSACleanup();
  32         }
  33 };
  34
  35 WinSockHelper wsh;
  36 #endif
  37
  38 }
  39
  40 namespace Msp {
  41 namespace Net {
  42
  43 Socket::Socket(const Private &p, const SockAddr &paddr):
  44         priv(new Private),
  45         connected(true),
  46         local_addr(0),
  47         peer_addr(paddr.copy())
  48 {
  49         priv->handle = p.handle;
  50
  51         sockaddr_storage sa;
  52         socklen_t size = sizeof(sockaddr_storage);
  53         getsockname(priv->handle, reinterpret_cast<sockaddr *>(&sa), &size);
  54         local_addr = SockAddr::create(sa);
  55
  56 #ifdef WIN32
  57         *priv->event = CreateEvent(0, false, false, 0);
  58 #else
  59         *priv->event = priv->handle;
  60 #endif
  61 }
  62
  63 Socket::Socket(Family af, int type, int proto):
  64         priv(new Private),
  65         connected(false),
  66         local_addr(0),
  67         peer_addr(0)
  68 {
  69         priv->handle = socket(af, type, proto);
  70
  71 #ifdef WIN32
  72         *priv->event = CreateEvent(0, false, false, 0);
  73 #else
  74         *priv->event = priv->handle;
  75 #endif
  76 }
  77
  78 Socket::~Socket()
  79 {
  80         signal_flush_required.emit();
  81 #ifdef WIN32
  82         closesocket(priv->handle);
  83         CloseHandle(*priv->event);
  84 #else
  85         ::close(priv->handle);
  86 #endif
  87
  88         delete local_addr;
  89         delete peer_addr;
  90         delete priv;
  91 }
  92
  93 void Socket::set_block(bool b)
  94 {
  95         mode = (mode&~IO::M_NONBLOCK);
  96         if(b)
  97                 mode = (mode|IO::M_NONBLOCK);
  98
  99 #ifdef WIN32
 100         u_long flag = !b;
 101         ioctlsocket(priv->handle, FIONBIO, &flag);
 102 #else
 103         int flags = fcntl(priv->handle, F_GETFL);
 104         fcntl(priv->handle, F_SETFL, (flags&O_NONBLOCK)|(b?0:O_NONBLOCK));
 105 #endif
 106 }
 107
 108 const IO::Handle &Socket::get_event_handle()
 109 {
 110         return priv->event;
 111 }
 112
 113
 114 void Socket::bind(const SockAddr &addr)
 115 {
 116         sockaddr_storage sa;
 117         unsigned size = addr.fill_sockaddr(sa);
 118
 119         int err = ::bind(priv->handle, reinterpret_cast<sockaddr *>(&sa), size);
 120         if(err==-1)
 121                 throw system_error("bind");
 122
 123         delete local_addr;
 124         local_addr = addr.copy();
 125 }
 126
 127 void Socket::set_timeout(const Time::TimeDelta &timeout)
 128 {
 129 #ifndef WIN32
 130         timeval tv = Time::rawtime_to_timeval(timeout.raw());
 131         set_option(SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(timeval));
 132         set_option(SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(timeval));
 133 #else
 134         DWORD msecs = static_cast<DWORD>(timeout/Time::msec);
 135         set_option(SOL_SOCKET, SO_RCVTIMEO, &msecs, sizeof(DWORD));
 136         set_option(SOL_SOCKET, SO_SNDTIMEO, &msecs, sizeof(DWORD));
 137 #endif
 138 }
 139
 140 const SockAddr &Socket::get_local_address() const
 141 {
 142         if(local_addr==0)
 143                 throw bad_socket_state("not bound");
 144         return *local_addr;
 145 }
 146
 147 const SockAddr &Socket::get_peer_address() const
 148 {
 149         if(peer_addr==0)
 150                 throw bad_socket_state("not connected");
 151         return *peer_addr;
 152 }
 153
 154 int Socket::set_option(int level, int optname, const void *optval, socklen_t optlen)
 155 {
 156 #ifdef WIN32
 157         return setsockopt(priv->handle, level, optname, reinterpret_cast<const char *>(optval), optlen);
 158 #else
 159         return setsockopt(priv->handle, level, optname, optval, optlen);
 160 #endif
 161 }
 162
 163 int Socket::get_option(int level, int optname, void *optval, socklen_t *optlen) const
 164 {
 165 #ifdef WIN32
 166         return getsockopt(priv->handle, level, optname, reinterpret_cast<char *>(optval), optlen);
 167 #else
 168         return getsockopt(priv->handle, level, optname, optval, optlen);
 169 #endif
 170 }
 171
 172 unsigned Socket::do_write(const char *buf, unsigned size)
 173 {
 174         if(!connected)
 175                 throw bad_socket_state("not connected");
 176
 177         if(size==0)
 178                 return 0;
 179
 180         int ret = ::send(priv->handle, buf, size, 0);
 181         if(ret<0)
 182         {
 183                 if(errno==EAGAIN)
 184                         return 0;
 185                 else
 186                         throw system_error("send");
 187         }
 188
 189         return ret;
 190 }
 191
 192 unsigned Socket::do_read(char *buf, unsigned size)
 193 {
 194         if(!connected)
 195                 throw bad_socket_state("not connected");
 196
 197
 198         if(size==0)
 199                 return 0;
 200
 201         int ret = ::recv(priv->handle, buf, size, 0);
 202         if(ret<0)
 203         {
 204                 if(errno==EAGAIN)
 205                         return 0;
 206                 else
 207                         throw system_error("recv");
 208         }
 209         else if(ret==0 && !eof_flag)
 210         {
 211                 eof_flag = true;
 212                 signal_end_of_file.emit();
 213                 set_events(IO::P_NONE);
 214         }
 215
 216         return ret;
 217 }
 218
 219 } // namespace Net
 220 } // namespace Msp