+// ==========================================================================
+// wxSocketImpl
+// ==========================================================================
+
+wxSocketImpl::wxSocketImpl(wxSocketBase& wxsocket)
+ : m_wxsocket(&wxsocket)
+{
+ m_fd = INVALID_SOCKET;
+ m_error = wxSOCKET_NOERROR;
+ m_server = false;
+ m_stream = true;
+
+ SetTimeout(wxsocket.GetTimeout() * 1000);
+
+ m_establishing = false;
+ m_reusable = false;
+ m_broadcast = false;
+ m_dobind = true;
+ m_initialRecvBufferSize = -1;
+ m_initialSendBufferSize = -1;
+}
+
+wxSocketImpl::~wxSocketImpl()
+{
+ if ( m_fd != INVALID_SOCKET )
+ Shutdown();
+}
+
+bool wxSocketImpl::PreCreateCheck(const wxSockAddressImpl& addr)
+{
+ if ( m_fd != INVALID_SOCKET )
+ {
+ m_error = wxSOCKET_INVSOCK;
+ return false;
+ }
+
+ if ( !addr.IsOk() )
+ {
+ m_error = wxSOCKET_INVADDR;
+ return false;
+ }
+
+ return true;
+}
+
+void wxSocketImpl::PostCreation()
+{
+ // FreeBSD variants can't use MSG_NOSIGNAL, and instead use a socket option
+#ifdef SO_NOSIGPIPE
+ EnableSocketOption(SO_NOSIGPIPE);
+#endif
+
+ if ( m_reusable )
+ EnableSocketOption(SO_REUSEADDR);
+
+ if ( m_broadcast )
+ {
+ wxASSERT_MSG( !m_stream, "broadcasting is for datagram sockets only" );
+
+ EnableSocketOption(SO_BROADCAST);
+ }
+
+ if ( m_initialRecvBufferSize >= 0 )
+ SetSocketOption(SO_RCVBUF, m_initialRecvBufferSize);
+ if ( m_initialSendBufferSize >= 0 )
+ SetSocketOption(SO_SNDBUF, m_initialSendBufferSize);
+
+ // we always put our sockets in unblocked mode and handle blocking
+ // ourselves in DoRead/Write() if wxSOCKET_WAITALL is specified
+ UnblockAndRegisterWithEventLoop();
+}
+
+wxSocketError wxSocketImpl::UpdateLocalAddress()
+{
+ if ( !m_local.IsOk() )
+ {
+ // ensure that we have a valid object using the correct family: correct
+ // being the same one as our peer uses as we have no other way to
+ // determine it
+ m_local.Create(m_peer.GetFamily());
+ }
+
+ WX_SOCKLEN_T lenAddr = m_local.GetLen();
+ if ( getsockname(m_fd, m_local.GetWritableAddr(), &lenAddr) != 0 )
+ {
+ Close();
+ m_error = wxSOCKET_IOERR;
+ return m_error;
+ }
+
+ return wxSOCKET_NOERROR;
+}
+
+wxSocketError wxSocketImpl::CreateServer()
+{
+ if ( !PreCreateCheck(m_local) )
+ return m_error;
+
+ m_server = true;
+ m_stream = true;
+
+ // do create the socket
+ m_fd = socket(m_local.GetFamily(), SOCK_STREAM, 0);
+
+ if ( m_fd == INVALID_SOCKET )
+ {
+ m_error = wxSOCKET_IOERR;
+ return wxSOCKET_IOERR;
+ }
+
+ PostCreation();
+
+ // and then bind to and listen on it
+ //
+ // FIXME: should we test for m_dobind here?
+ if ( bind(m_fd, m_local.GetAddr(), m_local.GetLen()) != 0 )
+ m_error = wxSOCKET_IOERR;
+
+ if ( IsOk() )
+ {
+ if ( listen(m_fd, 5) != 0 )
+ m_error = wxSOCKET_IOERR;
+ }
+
+ if ( !IsOk() )
+ {
+ Close();
+ return m_error;
+ }
+
+ // finally retrieve the address we effectively bound to
+ return UpdateLocalAddress();
+}
+
+wxSocketError wxSocketImpl::CreateClient(bool wait)
+{
+ if ( !PreCreateCheck(m_peer) )
+ return m_error;
+
+ m_fd = socket(m_peer.GetFamily(), SOCK_STREAM, 0);
+
+ if ( m_fd == INVALID_SOCKET )
+ {
+ m_error = wxSOCKET_IOERR;
+ return wxSOCKET_IOERR;
+ }
+
+ PostCreation();
+
+ // If a local address has been set, then bind to it before calling connect
+ if ( m_local.IsOk() )
+ {
+ if ( bind(m_fd, m_local.GetAddr(), m_local.GetLen()) != 0 )
+ {
+ Close();
+ m_error = wxSOCKET_IOERR;
+ return m_error;
+ }
+ }
+
+ // Do connect now
+ int rc = connect(m_fd, m_peer.GetAddr(), m_peer.GetLen());
+ if ( rc == SOCKET_ERROR )
+ {
+ wxSocketError err = GetLastError();
+ if ( err == wxSOCKET_WOULDBLOCK )
+ {
+ m_establishing = true;
+
+ // block waiting for connection if we should (otherwise just return
+ // wxSOCKET_WOULDBLOCK to the caller)
+ if ( wait )
+ {
+ err = SelectWithTimeout(wxSOCKET_CONNECTION_FLAG)
+ ? wxSOCKET_NOERROR
+ : wxSOCKET_TIMEDOUT;
+ m_establishing = false;
+ }
+ }
+
+ m_error = err;
+ }
+ else // connected
+ {
+ m_error = wxSOCKET_NOERROR;
+ }
+
+ return m_error;
+}
+
+
+wxSocketError wxSocketImpl::CreateUDP()
+{
+ if ( !PreCreateCheck(m_local) )
+ return m_error;
+
+ m_stream = false;
+ m_server = false;
+
+ m_fd = socket(m_local.GetFamily(), SOCK_DGRAM, 0);
+
+ if ( m_fd == INVALID_SOCKET )
+ {
+ m_error = wxSOCKET_IOERR;
+ return wxSOCKET_IOERR;
+ }
+
+ PostCreation();
+
+ if ( m_dobind )
+ {
+ if ( bind(m_fd, m_local.GetAddr(), m_local.GetLen()) != 0 )
+ {
+ Close();
+ m_error = wxSOCKET_IOERR;
+ return m_error;
+ }
+
+ return UpdateLocalAddress();
+ }
+
+ return wxSOCKET_NOERROR;
+}
+
+wxSocketImpl *wxSocketImpl::Accept(wxSocketBase& wxsocket)
+{
+ wxSockAddressStorage from;
+ WX_SOCKLEN_T fromlen = sizeof(from);
+ const SOCKET fd = accept(m_fd, &from.addr, &fromlen);
+
+ // accepting is similar to reading in the sense that it resets "ready for
+ // read" flag on the socket
+ ReenableEvents(wxSOCKET_INPUT_FLAG);
+
+ if ( fd == INVALID_SOCKET )
+ return NULL;
+
+ wxSocketManager * const manager = wxSocketManager::Get();
+ if ( !manager )
+ return NULL;
+
+ wxSocketImpl * const sock = manager->CreateSocket(wxsocket);
+ if ( !sock )
+ return NULL;
+
+ sock->m_fd = fd;
+ sock->m_peer = wxSockAddressImpl(from.addr, fromlen);
+
+ sock->UnblockAndRegisterWithEventLoop();
+
+ return sock;
+}
+
+
+void wxSocketImpl::Close()
+{
+ if ( m_fd != INVALID_SOCKET )
+ {
+ DoClose();
+ m_fd = INVALID_SOCKET;
+ }
+}
+
+void wxSocketImpl::Shutdown()
+{
+ if ( m_fd != INVALID_SOCKET )
+ {
+ shutdown(m_fd, 1 /* SD_SEND */);
+ Close();
+ }
+}
+
+/*
+ * Sets the timeout for blocking calls. Time is expressed in
+ * milliseconds.
+ */
+void wxSocketImpl::SetTimeout(unsigned long millis)
+{
+ SetTimeValFromMS(m_timeout, millis);
+}
+
+void wxSocketImpl::NotifyOnStateChange(wxSocketNotify event)
+{
+ m_wxsocket->OnRequest(event);
+}
+
+/* Address handling */
+wxSocketError wxSocketImpl::SetLocal(const wxSockAddressImpl& local)
+{
+ /* the socket must be initialized, or it must be a server */
+ if (m_fd != INVALID_SOCKET && !m_server)
+ {
+ m_error = wxSOCKET_INVSOCK;
+ return wxSOCKET_INVSOCK;
+ }
+
+ if ( !local.IsOk() )
+ {
+ m_error = wxSOCKET_INVADDR;
+ return wxSOCKET_INVADDR;
+ }
+
+ m_local = local;
+
+ return wxSOCKET_NOERROR;
+}
+
+wxSocketError wxSocketImpl::SetPeer(const wxSockAddressImpl& peer)
+{
+ if ( !peer.IsOk() )
+ {
+ m_error = wxSOCKET_INVADDR;
+ return wxSOCKET_INVADDR;
+ }
+
+ m_peer = peer;
+
+ return wxSOCKET_NOERROR;
+}
+
+const wxSockAddressImpl& wxSocketImpl::GetLocal()
+{
+ if ( !m_local.IsOk() )
+ UpdateLocalAddress();
+
+ return m_local;
+}
+
+// ----------------------------------------------------------------------------
+// wxSocketImpl IO
+// ----------------------------------------------------------------------------
+
+// this macro wraps the given expression (normally a syscall) in a loop which
+// ignores any interruptions, i.e. reevaluates it again if it failed and errno
+// is EINTR
+#ifdef __UNIX__
+ #define DO_WHILE_EINTR( rc, syscall ) \
+ do { \
+ rc = (syscall); \
+ } \
+ while ( rc == -1 && errno == EINTR )
+#else
+ #define DO_WHILE_EINTR( rc, syscall ) rc = (syscall)
+#endif
+
+int wxSocketImpl::RecvStream(void *buffer, int size)
+{
+ int ret;
+ DO_WHILE_EINTR( ret, recv(m_fd, static_cast<char *>(buffer), size, 0) );
+
+ if ( !ret )
+ {
+ // receiving 0 bytes for a TCP socket indicates that the connection was
+ // closed by peer so shut down our end as well (for UDP sockets empty
+ // datagrams are also possible)
+ m_establishing = false;
+ NotifyOnStateChange(wxSOCKET_LOST);
+
+ Shutdown();
+
+ // do not return an error in this case however
+ }
+
+ return ret;
+}
+
+int wxSocketImpl::SendStream(const void *buffer, int size)
+{
+#ifdef wxNEEDS_IGNORE_SIGPIPE
+ IgnoreSignal ignore(SIGPIPE);
+#endif
+
+ int ret;
+ DO_WHILE_EINTR( ret, send(m_fd, static_cast<const char *>(buffer), size,
+ wxSOCKET_MSG_NOSIGNAL) );
+
+ return ret;
+}
+
+int wxSocketImpl::RecvDgram(void *buffer, int size)
+{
+ wxSockAddressStorage from;
+ WX_SOCKLEN_T fromlen = sizeof(from);
+
+ int ret;
+ DO_WHILE_EINTR( ret, recvfrom(m_fd, static_cast<char *>(buffer), size,
+ 0, &from.addr, &fromlen) );
+
+ if ( ret == SOCKET_ERROR )
+ return SOCKET_ERROR;
+
+ m_peer = wxSockAddressImpl(from.addr, fromlen);
+ if ( !m_peer.IsOk() )
+ return -1;
+
+ return ret;
+}
+
+int wxSocketImpl::SendDgram(const void *buffer, int size)
+{
+ if ( !m_peer.IsOk() )
+ {
+ m_error = wxSOCKET_INVADDR;
+ return -1;
+ }
+
+ int ret;
+ DO_WHILE_EINTR( ret, sendto(m_fd, static_cast<const char *>(buffer), size,
+ 0, m_peer.GetAddr(), m_peer.GetLen()) );
+
+ return ret;
+}
+
+int wxSocketImpl::Read(void *buffer, int size)
+{
+ // server sockets can't be used for IO, only to accept new connections
+ if ( m_fd == INVALID_SOCKET || m_server )
+ {
+ m_error = wxSOCKET_INVSOCK;
+ return -1;
+ }
+
+ int ret = m_stream ? RecvStream(buffer, size)
+ : RecvDgram(buffer, size);
+
+ m_error = ret == SOCKET_ERROR ? GetLastError() : wxSOCKET_NOERROR;
+
+ return ret;
+}
+
+int wxSocketImpl::Write(const void *buffer, int size)
+{
+ if ( m_fd == INVALID_SOCKET || m_server )
+ {
+ m_error = wxSOCKET_INVSOCK;
+ return -1;
+ }
+
+ int ret = m_stream ? SendStream(buffer, size)
+ : SendDgram(buffer, size);
+
+ m_error = ret == SOCKET_ERROR ? GetLastError() : wxSOCKET_NOERROR;
+
+ return ret;
+}
+
projects / wxWidgets.git / blobdiff