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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> |
aa499d20 | 22 | |
6cda58a6 GE |
23 | #include <boost/bind.hpp> |
24 | ||
ac7fdc22 | 25 | #include "server.hxx" |
a7170401 | 26 | #include "log.hxx" |
ac7fdc22 GE |
27 | |
28 | namespace libt2n | |
29 | { | |
30 | ||
a7170401 | 31 | server_connection::server_connection(int _timeout) |
6cda58a6 | 32 | : connection(), callbacks(__events_end) |
a7170401 GE |
33 | { |
34 | set_timeout(_timeout); | |
35 | reset_timeout(); | |
36 | connection_id=0; | |
37 | my_server=0; | |
38 | } | |
39 | ||
6cda58a6 GE |
40 | server_connection::~server_connection() |
41 | { | |
42 | // we want the connection_closed callbacks to be called before | |
43 | close(); | |
44 | ||
45 | do_callbacks(connection_deleted); | |
46 | } | |
47 | ||
48 | void server_connection::close() | |
49 | { | |
50 | if (!is_closed()) | |
51 | { | |
52 | connection::close(); | |
53 | do_callbacks(connection_closed); | |
54 | } | |
55 | } | |
a7170401 GE |
56 | |
57 | /// get pointer to logging stream, returns NULL if no logging needed | |
58 | std::ostream* server_connection::get_logstream(log_level_values level) | |
59 | { | |
60 | if (my_server != NULL) | |
d535333f GE |
61 | { |
62 | std::ostream* ostr=my_server->get_logstream(level); | |
63 | if (ostr != NULL) | |
64 | (*ostr) << "connection " << get_id() << ": "; | |
65 | return ostr; | |
66 | } | |
67 | else | |
68 | return NULL; | |
a7170401 GE |
69 | } |
70 | ||
71 | /// check if timeout is expired, close connection if so | |
a11e19b7 | 72 | void server_connection::check_timeout() |
ac7fdc22 | 73 | { |
a7170401 GE |
74 | if (timeout != -1 && last_action_time+timeout < time(NULL)) |
75 | { | |
76 | LOGSTREAM(debug,"timeout on connection " << connection_id << ", closing"); | |
ac7fdc22 | 77 | this->close(); |
a7170401 | 78 | } |
ac7fdc22 GE |
79 | } |
80 | ||
a7170401 | 81 | /// reset the timeout, e.g. if something is received |
a11e19b7 | 82 | void server_connection::reset_timeout() |
ac7fdc22 GE |
83 | { |
84 | last_action_time=time(NULL); | |
85 | } | |
86 | ||
6cda58a6 GE |
87 | /** @brief add a callback |
88 | ||
89 | @param event event the function will be called at | |
90 | @param func functor (see boost function) that will be called | |
91 | ||
92 | @example use boost::bind to bind to member functions and parameters like this: | |
93 | 17 is a fixed parameter that is always added to the call | |
94 | c.add_callback(connection_closed,bind(&my_class::func_to_call_back, boost::ref(*this), 17)); | |
95 | */ | |
96 | void server_connection::add_callback(callback_event_type event, const boost::function<void ()>& func) | |
97 | { | |
98 | if (event == new_connection) | |
04d86ba4 | 99 | throw std::logic_error("new_connection callback not allowed for server_connections"); |
6cda58a6 GE |
100 | |
101 | callbacks[event].push_back(func); | |
102 | } | |
103 | ||
104 | void server_connection::do_callbacks(callback_event_type event) | |
105 | { | |
106 | std::list<boost::function<void ()> >::iterator i,ie=callbacks[event].end(); | |
107 | for (i=callbacks[event].begin(); i != ie; i++) | |
108 | (*i)(); | |
109 | } | |
110 | ||
a7170401 | 111 | server::server() |
28cb45a5 | 112 | : callbacks(__events_end) |
a7170401 GE |
113 | { |
114 | set_default_timeout(30); | |
115 | set_logging(NULL,none); | |
116 | next_id=1; | |
117 | } | |
118 | ||
ac7fdc22 GE |
119 | server::~server() |
120 | { | |
a11e19b7 GE |
121 | std::map<unsigned int, server_connection*>::iterator ie=connections.end(); |
122 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++) | |
ac7fdc22 GE |
123 | delete i->second; |
124 | } | |
125 | ||
28cb45a5 GE |
126 | /** @brief add a callback |
127 | ||
128 | @param event event the function will be called at | |
129 | @param func functor (see boost function) that will be called | |
6cda58a6 GE |
130 | |
131 | @example use boost::bind to bind to member functions like this: | |
132 | s.add_callback(new_connection,bind(&my_class::func_to_call_back, boost::ref(*this), _1)); | |
28cb45a5 | 133 | */ |
6cda58a6 | 134 | void server::add_callback(callback_event_type event, const boost::function<void (unsigned int)>& func) |
28cb45a5 GE |
135 | { |
136 | callbacks[event].push_back(func); | |
6cda58a6 GE |
137 | |
138 | // add callback to all existing connections | |
139 | if (event != new_connection) | |
140 | { | |
141 | std::map<unsigned int, server_connection*>::iterator ie=connections.end(); | |
142 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++) | |
143 | i->second->add_callback(event,bind(func, i->first)); | |
144 | } | |
28cb45a5 GE |
145 | } |
146 | ||
6cda58a6 | 147 | void server::do_callbacks(callback_event_type event, unsigned int conn_id) |
28cb45a5 | 148 | { |
6cda58a6 | 149 | std::list<boost::function<void (unsigned int)> >::iterator i,ie=callbacks[event].end(); |
28cb45a5 | 150 | for (i=callbacks[event].begin(); i != ie; i++) |
6cda58a6 | 151 | (*i)(conn_id); |
28cb45a5 GE |
152 | } |
153 | ||
a11e19b7 | 154 | int server::add_connection(server_connection* newconn) |
04e6b271 | 155 | { |
aa499d20 GE |
156 | unsigned int cid=next_id++; |
157 | newconn->set_id(cid); | |
158 | newconn->set_server(this); | |
159 | connections[cid]=newconn; | |
a7170401 | 160 | |
6cda58a6 GE |
161 | // add all callbacks |
162 | for(int e=connection_closed; e != __events_end; e++) | |
163 | { | |
164 | std::list<boost::function<void (unsigned int)> >::iterator i,ie=callbacks[e].end(); | |
165 | for (i=callbacks[e].begin(); i != ie; i++) | |
166 | newconn->add_callback(static_cast<callback_event_type>(e),bind(*i,cid)); | |
167 | } | |
168 | ||
a7170401 GE |
169 | LOGSTREAM(debug,"new connection accepted, id: " << cid); |
170 | ||
6cda58a6 | 171 | do_callbacks(new_connection,cid); |
28cb45a5 | 172 | |
aa499d20 | 173 | return cid; |
04e6b271 GE |
174 | } |
175 | ||
a7170401 GE |
176 | /// activate logging to the given stream. everything above the given level is logged. |
177 | void server::set_logging(std::ostream *_logstream, log_level_values _log_level) | |
178 | { | |
179 | log_level=_log_level; | |
180 | logstream=_logstream; | |
181 | } | |
182 | ||
59adb9e2 | 183 | /** |
94247295 | 184 | @brief Gets a connection by id |
59adb9e2 | 185 | |
94247295 | 186 | @param conn_id Connection ID |
59adb9e2 | 187 | |
94247295 | 188 | @retval Pointer to connection object |
59adb9e2 | 189 | */ |
a11e19b7 | 190 | server_connection* server::get_connection(unsigned int conn_id) |
ac7fdc22 | 191 | { |
a11e19b7 | 192 | std::map<unsigned int, server_connection*>::iterator p=connections.find(conn_id); |
ac7fdc22 GE |
193 | if (p==connections.end()) |
194 | return NULL; | |
195 | else | |
196 | return p->second; | |
197 | } | |
198 | ||
94247295 | 199 | /// check for timeouts, remove closed connections. don't forget to call this from time to time. |
a11e19b7 | 200 | void server::cleanup() |
ac7fdc22 | 201 | { |
a11e19b7 GE |
202 | std::map<unsigned int, server_connection*>::iterator ie=connections.end(); |
203 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++) | |
ac7fdc22 | 204 | i->second->check_timeout(); |
a11e19b7 GE |
205 | |
206 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie;) | |
207 | { | |
208 | if (i->second->is_closed() && !i->second->packet_available()) | |
209 | { | |
210 | // closed and no usable data in buffer -> remove | |
a7170401 GE |
211 | LOGSTREAM(debug,"removing conneciton " << i->first << " because it is closed and no more data waiting"); |
212 | ||
a11e19b7 GE |
213 | delete i->second; |
214 | connections.erase(i); | |
215 | i=connections.begin(); | |
216 | ie=connections.end(); | |
217 | } | |
218 | else | |
219 | i++; | |
220 | } | |
ac7fdc22 GE |
221 | } |
222 | ||
a7170401 GE |
223 | /** @brief get a complete data packet from any client. The packet is removed from the |
224 | connection buffer. | |
225 | @param[out] data the data package | |
226 | @param[out] conn_id the connection id we got this packet from | |
227 | @retval true if packet found | |
228 | */ | |
ac7fdc22 GE |
229 | bool server::get_packet(std::string& data, unsigned int& conn_id) |
230 | { | |
231 | // todo: this is somehow unfair: the first connections in the map get checked more | |
232 | // often than the others and can thus block them out | |
233 | ||
a11e19b7 GE |
234 | std::map<unsigned int, server_connection*>::iterator ie=connections.end(); |
235 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++) | |
236 | if (i->second->get_packet(data)) | |
237 | { | |
a7170401 GE |
238 | LOGSTREAM(debug,"got packet (" << data.size() << " bytes) from connection " << i->first); |
239 | ||
a11e19b7 | 240 | conn_id=i->first; |
ac7fdc22 | 241 | return true; |
a11e19b7 GE |
242 | } |
243 | ||
244 | return false; | |
ac7fdc22 GE |
245 | } |
246 | ||
a7170401 GE |
247 | /// get pointer to logging stream, returns NULL if no logging needed |
248 | std::ostream* server::get_logstream(log_level_values level) | |
ac7fdc22 | 249 | { |
d535333f | 250 | if (logstream && log_level >= level) |
a7170401 | 251 | return logstream; |
d535333f GE |
252 | else |
253 | return NULL; | |
ac7fdc22 | 254 | } |
ac7fdc22 | 255 | }; |