1 /***************************************************************************
2 * Copyright (C) 2006 by Gerd v. Egidy *
5 * This library is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU Lesser General Public License version *
7 * 2.1 as published by the Free Software Foundation. *
9 * This library is distributed in the hope that it will be useful, *
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
12 * GNU Lesser General Public License for more details. *
14 * You should have received a copy of the GNU Lesser General Public *
15 * License along with this program; if not, write to the *
16 * Free Software Foundation, Inc., *
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
18 ***************************************************************************/
24 #include <netinet/in.h>
26 #include "connection.hxx"
31 connection::packet_size_indicator connection::bytes_available()
33 // max packet size is unsigned int
35 // no size information -> no packet
36 if (buffer.size() < sizeof(packet_size_indicator))
39 packet_size_indicator psize=ntohl(*((packet_size_indicator*)(buffer.data())));
41 // enough data for one packet in buffer?
42 if (buffer.size() < sizeof(packet_size_indicator)+psize)
45 // ok, full packet there
49 /** @brief read a complete data packet from the buffer. The packet is removed from the
51 @param[out] data the data package
52 @retval true if packet found
54 bool connection::get_packet(std::string& data)
56 packet_size_indicator psize;
58 if ((psize=bytes_available()))
60 data.assign(buffer,sizeof(packet_size_indicator),psize);
61 buffer.erase(0,sizeof(packet_size_indicator)+psize);
68 /// send a blob to the peer
69 void connection::write(const std::string& data)
71 // prepend packet size to data
72 packet_size_indicator psize=htonl(data.size());
73 std::string send_data(data);
74 send_data.insert(0,(char*)&psize,sizeof(packet_size_indicator));
76 real_write(send_data);