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19facd85 TJ |
1 | /* |
2 | Copyright (C) 2006 by Intra2net AG - Gerd v. Egidy | |
3 | ||
4 | The software in this package is distributed under the GNU General | |
5 | Public License version 2 (with a special exception described below). | |
6 | ||
7 | A copy of GNU General Public License (GPL) is included in this distribution, | |
8 | in the file COPYING.GPL. | |
9 | ||
10 | As a special exception, if other files instantiate templates or use macros | |
11 | or inline functions from this file, or you compile this file and link it | |
12 | with other works to produce a work based on this file, this file | |
13 | does not by itself cause the resulting work to be covered | |
14 | by the GNU General Public License. | |
15 | ||
16 | However the source code for this file must still be made available | |
17 | in accordance with section (3) of the GNU General Public License. | |
18 | ||
19 | This exception does not invalidate any other reasons why a work based | |
20 | on this file might be covered by the GNU General Public License. | |
21 | */ | |
ac7fdc22 | 22 | |
aa499d20 | 23 | #include <sstream> |
04d86ba4 | 24 | #include <stdexcept> |
f3823a13 | 25 | #include <time.h> |
aa499d20 | 26 | |
6cda58a6 GE |
27 | #include <boost/bind.hpp> |
28 | ||
ac7fdc22 | 29 | #include "server.hxx" |
a7170401 | 30 | #include "log.hxx" |
ac7fdc22 GE |
31 | |
32 | namespace libt2n | |
33 | { | |
34 | ||
a7170401 | 35 | server_connection::server_connection(int _timeout) |
56f3994d TJ |
36 | : connection_id(0) |
37 | , my_server(NULL) | |
38 | , connection() | |
a7170401 GE |
39 | { |
40 | set_timeout(_timeout); | |
41 | reset_timeout(); | |
56f3994d TJ |
42 | } |
43 | ||
44 | /** | |
45 | * Destructor | |
46 | */ | |
47 | server_connection::~server_connection() | |
48 | { | |
a7170401 GE |
49 | } |
50 | ||
a7170401 GE |
51 | /// get pointer to logging stream, returns NULL if no logging needed |
52 | std::ostream* server_connection::get_logstream(log_level_values level) | |
53 | { | |
54 | if (my_server != NULL) | |
d535333f GE |
55 | { |
56 | std::ostream* ostr=my_server->get_logstream(level); | |
57 | if (ostr != NULL) | |
58 | (*ostr) << "connection " << get_id() << ": "; | |
59 | return ostr; | |
60 | } | |
61 | else | |
62 | return NULL; | |
a7170401 GE |
63 | } |
64 | ||
65 | /// check if timeout is expired, close connection if so | |
a11e19b7 | 66 | void server_connection::check_timeout() |
ac7fdc22 | 67 | { |
a7170401 GE |
68 | if (timeout != -1 && last_action_time+timeout < time(NULL)) |
69 | { | |
70 | LOGSTREAM(debug,"timeout on connection " << connection_id << ", closing"); | |
ac7fdc22 | 71 | this->close(); |
a7170401 | 72 | } |
ac7fdc22 GE |
73 | } |
74 | ||
a7170401 | 75 | /// reset the timeout, e.g. if something is received |
a11e19b7 | 76 | void server_connection::reset_timeout() |
ac7fdc22 GE |
77 | { |
78 | last_action_time=time(NULL); | |
79 | } | |
80 | ||
487afb79 GE |
81 | /** @brief add a callback to one connection |
82 | ||
83 | @param event event the function will be called at | |
84 | @param func functor (see boost::function) that will be called | |
85 | */ | |
6cda58a6 GE |
86 | void server_connection::add_callback(callback_event_type event, const boost::function<void ()>& func) |
87 | { | |
88 | if (event == new_connection) | |
04d86ba4 | 89 | throw std::logic_error("new_connection callback not allowed for server_connections"); |
6cda58a6 | 90 | |
a64066eb | 91 | connection::add_callback(event,func); |
6cda58a6 GE |
92 | } |
93 | ||
a7170401 | 94 | server::server() |
28cb45a5 | 95 | : callbacks(__events_end) |
a7170401 GE |
96 | { |
97 | set_default_timeout(30); | |
98 | set_logging(NULL,none); | |
99 | next_id=1; | |
100 | } | |
101 | ||
ac7fdc22 GE |
102 | server::~server() |
103 | { | |
a11e19b7 GE |
104 | std::map<unsigned int, server_connection*>::iterator ie=connections.end(); |
105 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++) | |
ac7fdc22 | 106 | delete i->second; |
56f3994d TJ |
107 | |
108 | connections.clear(); | |
109 | } | |
110 | ||
111 | /** | |
112 | * Close all open connections | |
113 | */ | |
114 | void server::close() | |
115 | { | |
116 | std::map<unsigned int, server_connection*>::iterator ie=connections.end(); | |
117 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; ++i) | |
118 | i->second->close(); | |
ac7fdc22 GE |
119 | } |
120 | ||
28cb45a5 GE |
121 | /** @brief add a callback |
122 | ||
123 | @param event event the function will be called at | |
487afb79 | 124 | @param func functor (see boost::function) that will be called |
6cda58a6 | 125 | |
e1d0794d | 126 | @note use boost::bind to bind to member functions like this: |
487afb79 | 127 | s.add_callback(new_connection,boost::bind(&my_class::func_to_call_back, boost::ref(*this), _1)); |
28cb45a5 | 128 | */ |
6cda58a6 | 129 | void server::add_callback(callback_event_type event, const boost::function<void (unsigned int)>& func) |
28cb45a5 GE |
130 | { |
131 | callbacks[event].push_back(func); | |
6cda58a6 GE |
132 | |
133 | // add callback to all existing connections | |
134 | if (event != new_connection) | |
135 | { | |
136 | std::map<unsigned int, server_connection*>::iterator ie=connections.end(); | |
137 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++) | |
487afb79 | 138 | i->second->add_callback(event,boost::bind(func, i->first)); |
6cda58a6 | 139 | } |
28cb45a5 GE |
140 | } |
141 | ||
487afb79 GE |
142 | |
143 | /** @brief an event occured, call all server-side callbacks | |
144 | ||
145 | @param event event that occured | |
146 | @param conn_id connection-id parameter that will be given to the callback-function | |
147 | */ | |
6cda58a6 | 148 | void server::do_callbacks(callback_event_type event, unsigned int conn_id) |
28cb45a5 | 149 | { |
6cda58a6 | 150 | std::list<boost::function<void (unsigned int)> >::iterator i,ie=callbacks[event].end(); |
28cb45a5 | 151 | for (i=callbacks[event].begin(); i != ie; i++) |
6cda58a6 | 152 | (*i)(conn_id); |
28cb45a5 GE |
153 | } |
154 | ||
487afb79 | 155 | /// add a new connection to the server |
56f3994d | 156 | unsigned int server::add_connection(server_connection* newconn) |
04e6b271 | 157 | { |
aa499d20 GE |
158 | unsigned int cid=next_id++; |
159 | newconn->set_id(cid); | |
160 | newconn->set_server(this); | |
161 | connections[cid]=newconn; | |
a7170401 | 162 | |
af84dfb5 | 163 | // add all callbacks except new_connection |
6cda58a6 GE |
164 | for(int e=connection_closed; e != __events_end; e++) |
165 | { | |
166 | std::list<boost::function<void (unsigned int)> >::iterator i,ie=callbacks[e].end(); | |
167 | for (i=callbacks[e].begin(); i != ie; i++) | |
168 | newconn->add_callback(static_cast<callback_event_type>(e),bind(*i,cid)); | |
169 | } | |
170 | ||
a7170401 GE |
171 | LOGSTREAM(debug,"new connection accepted, id: " << cid); |
172 | ||
6cda58a6 | 173 | do_callbacks(new_connection,cid); |
28cb45a5 | 174 | |
aa499d20 | 175 | return cid; |
04e6b271 GE |
176 | } |
177 | ||
a7170401 GE |
178 | /// activate logging to the given stream. everything above the given level is logged. |
179 | void server::set_logging(std::ostream *_logstream, log_level_values _log_level) | |
180 | { | |
181 | log_level=_log_level; | |
182 | logstream=_logstream; | |
183 | } | |
184 | ||
59adb9e2 | 185 | /** |
94247295 | 186 | @brief Gets a connection by id |
59adb9e2 | 187 | |
94247295 | 188 | @param conn_id Connection ID |
59adb9e2 | 189 | |
94247295 | 190 | @retval Pointer to connection object |
59adb9e2 | 191 | */ |
a11e19b7 | 192 | server_connection* server::get_connection(unsigned int conn_id) |
ac7fdc22 | 193 | { |
a11e19b7 | 194 | std::map<unsigned int, server_connection*>::iterator p=connections.find(conn_id); |
ac7fdc22 GE |
195 | if (p==connections.end()) |
196 | return NULL; | |
197 | else | |
198 | return p->second; | |
199 | } | |
200 | ||
94247295 | 201 | /// check for timeouts, remove closed connections. don't forget to call this from time to time. |
a11e19b7 | 202 | void server::cleanup() |
ac7fdc22 | 203 | { |
a11e19b7 GE |
204 | std::map<unsigned int, server_connection*>::iterator ie=connections.end(); |
205 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++) | |
ac7fdc22 | 206 | i->second->check_timeout(); |
a11e19b7 GE |
207 | |
208 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie;) | |
209 | { | |
210 | if (i->second->is_closed() && !i->second->packet_available()) | |
211 | { | |
212 | // closed and no usable data in buffer -> remove | |
38de59c2 | 213 | LOGSTREAM(debug,"removing connection " << i->first << " because it is closed and no more data waiting"); |
a7170401 | 214 | |
a11e19b7 GE |
215 | delete i->second; |
216 | connections.erase(i); | |
217 | i=connections.begin(); | |
218 | ie=connections.end(); | |
219 | } | |
220 | else | |
221 | i++; | |
222 | } | |
ac7fdc22 GE |
223 | } |
224 | ||
a7170401 GE |
225 | /** @brief get a complete data packet from any client. The packet is removed from the |
226 | connection buffer. | |
227 | @param[out] data the data package | |
228 | @param[out] conn_id the connection id we got this packet from | |
229 | @retval true if packet found | |
230 | */ | |
ac7fdc22 GE |
231 | bool server::get_packet(std::string& data, unsigned int& conn_id) |
232 | { | |
233 | // todo: this is somehow unfair: the first connections in the map get checked more | |
234 | // often than the others and can thus block them out | |
235 | ||
a11e19b7 GE |
236 | std::map<unsigned int, server_connection*>::iterator ie=connections.end(); |
237 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++) | |
238 | if (i->second->get_packet(data)) | |
239 | { | |
a7170401 GE |
240 | LOGSTREAM(debug,"got packet (" << data.size() << " bytes) from connection " << i->first); |
241 | ||
a11e19b7 | 242 | conn_id=i->first; |
ac7fdc22 | 243 | return true; |
a11e19b7 GE |
244 | } |
245 | ||
246 | return false; | |
ac7fdc22 GE |
247 | } |
248 | ||
a7170401 GE |
249 | /// get pointer to logging stream, returns NULL if no logging needed |
250 | std::ostream* server::get_logstream(log_level_values level) | |
ac7fdc22 | 251 | { |
d535333f | 252 | if (logstream && log_level >= level) |
a7170401 | 253 | return logstream; |
d535333f GE |
254 | else |
255 | return NULL; | |
ac7fdc22 | 256 | } |
ac7fdc22 | 257 | }; |