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ac7fdc22 GE |
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 | ||
aa499d20 | 20 | #include <sstream> |
04d86ba4 | 21 | #include <stdexcept> |
f3823a13 | 22 | #include <time.h> |
aa499d20 | 23 | |
6cda58a6 GE |
24 | #include <boost/bind.hpp> |
25 | ||
ac7fdc22 | 26 | #include "server.hxx" |
a7170401 | 27 | #include "log.hxx" |
ac7fdc22 GE |
28 | |
29 | namespace libt2n | |
30 | { | |
31 | ||
a7170401 | 32 | server_connection::server_connection(int _timeout) |
56f3994d TJ |
33 | : connection_id(0) |
34 | , my_server(NULL) | |
35 | , connection() | |
a7170401 GE |
36 | { |
37 | set_timeout(_timeout); | |
38 | reset_timeout(); | |
56f3994d TJ |
39 | } |
40 | ||
41 | /** | |
42 | * Destructor | |
43 | */ | |
44 | server_connection::~server_connection() | |
45 | { | |
a7170401 GE |
46 | } |
47 | ||
a7170401 GE |
48 | /// get pointer to logging stream, returns NULL if no logging needed |
49 | std::ostream* server_connection::get_logstream(log_level_values level) | |
50 | { | |
51 | if (my_server != NULL) | |
d535333f GE |
52 | { |
53 | std::ostream* ostr=my_server->get_logstream(level); | |
54 | if (ostr != NULL) | |
55 | (*ostr) << "connection " << get_id() << ": "; | |
56 | return ostr; | |
57 | } | |
58 | else | |
59 | return NULL; | |
a7170401 GE |
60 | } |
61 | ||
62 | /// check if timeout is expired, close connection if so | |
a11e19b7 | 63 | void server_connection::check_timeout() |
ac7fdc22 | 64 | { |
a7170401 GE |
65 | if (timeout != -1 && last_action_time+timeout < time(NULL)) |
66 | { | |
67 | LOGSTREAM(debug,"timeout on connection " << connection_id << ", closing"); | |
ac7fdc22 | 68 | this->close(); |
a7170401 | 69 | } |
ac7fdc22 GE |
70 | } |
71 | ||
a7170401 | 72 | /// reset the timeout, e.g. if something is received |
a11e19b7 | 73 | void server_connection::reset_timeout() |
ac7fdc22 GE |
74 | { |
75 | last_action_time=time(NULL); | |
76 | } | |
77 | ||
487afb79 GE |
78 | /** @brief add a callback to one connection |
79 | ||
80 | @param event event the function will be called at | |
81 | @param func functor (see boost::function) that will be called | |
82 | */ | |
6cda58a6 GE |
83 | void server_connection::add_callback(callback_event_type event, const boost::function<void ()>& func) |
84 | { | |
85 | if (event == new_connection) | |
04d86ba4 | 86 | throw std::logic_error("new_connection callback not allowed for server_connections"); |
6cda58a6 | 87 | |
a64066eb | 88 | connection::add_callback(event,func); |
6cda58a6 GE |
89 | } |
90 | ||
a7170401 | 91 | server::server() |
28cb45a5 | 92 | : callbacks(__events_end) |
a7170401 GE |
93 | { |
94 | set_default_timeout(30); | |
95 | set_logging(NULL,none); | |
96 | next_id=1; | |
97 | } | |
98 | ||
ac7fdc22 GE |
99 | server::~server() |
100 | { | |
a11e19b7 GE |
101 | std::map<unsigned int, server_connection*>::iterator ie=connections.end(); |
102 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++) | |
ac7fdc22 | 103 | delete i->second; |
56f3994d TJ |
104 | |
105 | connections.clear(); | |
106 | } | |
107 | ||
108 | /** | |
109 | * Close all open connections | |
110 | */ | |
111 | void server::close() | |
112 | { | |
113 | std::map<unsigned int, server_connection*>::iterator ie=connections.end(); | |
114 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; ++i) | |
115 | i->second->close(); | |
ac7fdc22 GE |
116 | } |
117 | ||
28cb45a5 GE |
118 | /** @brief add a callback |
119 | ||
120 | @param event event the function will be called at | |
487afb79 | 121 | @param func functor (see boost::function) that will be called |
6cda58a6 | 122 | |
e1d0794d | 123 | @note use boost::bind to bind to member functions like this: |
487afb79 | 124 | s.add_callback(new_connection,boost::bind(&my_class::func_to_call_back, boost::ref(*this), _1)); |
28cb45a5 | 125 | */ |
6cda58a6 | 126 | void server::add_callback(callback_event_type event, const boost::function<void (unsigned int)>& func) |
28cb45a5 GE |
127 | { |
128 | callbacks[event].push_back(func); | |
6cda58a6 GE |
129 | |
130 | // add callback to all existing connections | |
131 | if (event != new_connection) | |
132 | { | |
133 | std::map<unsigned int, server_connection*>::iterator ie=connections.end(); | |
134 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++) | |
487afb79 | 135 | i->second->add_callback(event,boost::bind(func, i->first)); |
6cda58a6 | 136 | } |
28cb45a5 GE |
137 | } |
138 | ||
487afb79 GE |
139 | |
140 | /** @brief an event occured, call all server-side callbacks | |
141 | ||
142 | @param event event that occured | |
143 | @param conn_id connection-id parameter that will be given to the callback-function | |
144 | */ | |
6cda58a6 | 145 | void server::do_callbacks(callback_event_type event, unsigned int conn_id) |
28cb45a5 | 146 | { |
6cda58a6 | 147 | std::list<boost::function<void (unsigned int)> >::iterator i,ie=callbacks[event].end(); |
28cb45a5 | 148 | for (i=callbacks[event].begin(); i != ie; i++) |
6cda58a6 | 149 | (*i)(conn_id); |
28cb45a5 GE |
150 | } |
151 | ||
487afb79 | 152 | /// add a new connection to the server |
56f3994d | 153 | unsigned int server::add_connection(server_connection* newconn) |
04e6b271 | 154 | { |
aa499d20 GE |
155 | unsigned int cid=next_id++; |
156 | newconn->set_id(cid); | |
157 | newconn->set_server(this); | |
158 | connections[cid]=newconn; | |
a7170401 | 159 | |
af84dfb5 | 160 | // add all callbacks except new_connection |
6cda58a6 GE |
161 | for(int e=connection_closed; e != __events_end; e++) |
162 | { | |
163 | std::list<boost::function<void (unsigned int)> >::iterator i,ie=callbacks[e].end(); | |
164 | for (i=callbacks[e].begin(); i != ie; i++) | |
165 | newconn->add_callback(static_cast<callback_event_type>(e),bind(*i,cid)); | |
166 | } | |
167 | ||
a7170401 GE |
168 | LOGSTREAM(debug,"new connection accepted, id: " << cid); |
169 | ||
6cda58a6 | 170 | do_callbacks(new_connection,cid); |
28cb45a5 | 171 | |
aa499d20 | 172 | return cid; |
04e6b271 GE |
173 | } |
174 | ||
a7170401 GE |
175 | /// activate logging to the given stream. everything above the given level is logged. |
176 | void server::set_logging(std::ostream *_logstream, log_level_values _log_level) | |
177 | { | |
178 | log_level=_log_level; | |
179 | logstream=_logstream; | |
180 | } | |
181 | ||
59adb9e2 | 182 | /** |
94247295 | 183 | @brief Gets a connection by id |
59adb9e2 | 184 | |
94247295 | 185 | @param conn_id Connection ID |
59adb9e2 | 186 | |
94247295 | 187 | @retval Pointer to connection object |
59adb9e2 | 188 | */ |
a11e19b7 | 189 | server_connection* server::get_connection(unsigned int conn_id) |
ac7fdc22 | 190 | { |
a11e19b7 | 191 | std::map<unsigned int, server_connection*>::iterator p=connections.find(conn_id); |
ac7fdc22 GE |
192 | if (p==connections.end()) |
193 | return NULL; | |
194 | else | |
195 | return p->second; | |
196 | } | |
197 | ||
94247295 | 198 | /// check for timeouts, remove closed connections. don't forget to call this from time to time. |
a11e19b7 | 199 | void server::cleanup() |
ac7fdc22 | 200 | { |
a11e19b7 GE |
201 | std::map<unsigned int, server_connection*>::iterator ie=connections.end(); |
202 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++) | |
ac7fdc22 | 203 | i->second->check_timeout(); |
a11e19b7 GE |
204 | |
205 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie;) | |
206 | { | |
207 | if (i->second->is_closed() && !i->second->packet_available()) | |
208 | { | |
209 | // closed and no usable data in buffer -> remove | |
38de59c2 | 210 | LOGSTREAM(debug,"removing connection " << i->first << " because it is closed and no more data waiting"); |
a7170401 | 211 | |
a11e19b7 GE |
212 | delete i->second; |
213 | connections.erase(i); | |
214 | i=connections.begin(); | |
215 | ie=connections.end(); | |
216 | } | |
217 | else | |
218 | i++; | |
219 | } | |
ac7fdc22 GE |
220 | } |
221 | ||
a7170401 GE |
222 | /** @brief get a complete data packet from any client. The packet is removed from the |
223 | connection buffer. | |
224 | @param[out] data the data package | |
225 | @param[out] conn_id the connection id we got this packet from | |
226 | @retval true if packet found | |
227 | */ | |
ac7fdc22 GE |
228 | bool server::get_packet(std::string& data, unsigned int& conn_id) |
229 | { | |
230 | // todo: this is somehow unfair: the first connections in the map get checked more | |
231 | // often than the others and can thus block them out | |
232 | ||
a11e19b7 GE |
233 | std::map<unsigned int, server_connection*>::iterator ie=connections.end(); |
234 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++) | |
235 | if (i->second->get_packet(data)) | |
236 | { | |
a7170401 GE |
237 | LOGSTREAM(debug,"got packet (" << data.size() << " bytes) from connection " << i->first); |
238 | ||
a11e19b7 | 239 | conn_id=i->first; |
ac7fdc22 | 240 | return true; |
a11e19b7 GE |
241 | } |
242 | ||
243 | return false; | |
ac7fdc22 GE |
244 | } |
245 | ||
a7170401 GE |
246 | /// get pointer to logging stream, returns NULL if no logging needed |
247 | std::ostream* server::get_logstream(log_level_values level) | |
ac7fdc22 | 248 | { |
d535333f | 249 | if (logstream && log_level >= level) |
a7170401 | 250 | return logstream; |
d535333f GE |
251 | else |
252 | return NULL; | |
ac7fdc22 | 253 | } |
ac7fdc22 | 254 | }; |