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