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1 | /*************************************************************************** |
2 | * Copyright (C) 2006 by Gerd v. Egidy * | |
3 | * gve@intra2net.com * | |
4 | * * | |
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. * | |
8 | * * | |
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. * | |
13 | * * | |
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 | ***************************************************************************/ | |
19 | ||
20 | #include <string> | |
21 | #include <sstream> | |
22 | ||
23 | #include "connection.hxx" | |
24 | ||
25 | namespace libt2n | |
26 | { | |
27 | ||
28 | connection::packet_size_indicator connection::bytes_available() | |
29 | { | |
30 | // max packet size is unsigned int | |
31 | ||
32 | // no size information -> no packet | |
33 | if (buffer.size() < sizeof(unsigned int)) | |
644c4d26 | 34 | return 0; |
a11e19b7 GE |
35 | |
36 | packet_size_indicator psize=*((packet_size_indicator*)(buffer.data())); | |
37 | ||
38 | // enough data for one packet in buffer? | |
39 | if (buffer.size() < sizeof(unsigned int)+psize) | |
644c4d26 | 40 | return 0; |
a11e19b7 GE |
41 | |
42 | // ok, full packet there | |
644c4d26 | 43 | return psize; |
a11e19b7 GE |
44 | } |
45 | ||
94247295 GE |
46 | /** @brief read a complete data packet from the buffer. The packet is removed from the |
47 | connection buffer. | |
48 | @param[out] data the data package | |
49 | @retval true if packet found | |
50 | */ | |
a11e19b7 GE |
51 | bool connection::get_packet(std::string& data) |
52 | { | |
53 | packet_size_indicator psize; | |
54 | ||
55 | if ((psize=bytes_available())) | |
56 | { | |
57 | data.assign(buffer,sizeof(unsigned int),psize); | |
58 | buffer.erase(0,sizeof(unsigned int)+psize); | |
59 | return true; | |
60 | } | |
61 | else | |
62 | return false; | |
63 | } | |
64 | ||
94247295 | 65 | /// send a blob to the peer |
a11e19b7 GE |
66 | void connection::write(const std::string& data) |
67 | { | |
68 | // prepend packet size to data | |
69 | packet_size_indicator psize=data.size(); | |
70 | std::string send_data(data); | |
644c4d26 | 71 | send_data.insert(0,(char*)&psize,sizeof(packet_size_indicator)); |
a11e19b7 GE |
72 | |
73 | real_write(send_data); | |
74 | } | |
75 | ||
a11e19b7 | 76 | } |