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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 | */ | |
7087e187 GE |
22 | |
23 | #include <string> | |
24 | #include <sstream> | |
25 | #include <stdexcept> | |
28cb45a5 | 26 | #include <iostream> |
7087e187 GE |
27 | |
28 | #include <boost/archive/binary_oarchive.hpp> | |
29 | #include <boost/archive/binary_iarchive.hpp> | |
30 | #include <boost/archive/xml_oarchive.hpp> | |
31 | #include <boost/archive/xml_iarchive.hpp> | |
32 | #include <boost/serialization/serialization.hpp> | |
7087e187 | 33 | |
28cb45a5 GE |
34 | #include <boost/bind.hpp> |
35 | ||
7087e187 GE |
36 | #include "command_server.hxx" |
37 | #include "container.hxx" | |
a7170401 | 38 | #include "log.hxx" |
7087e187 | 39 | |
8104c8f7 | 40 | #include <config.h> |
8104c8f7 | 41 | |
7087e187 GE |
42 | using namespace std; |
43 | ||
44 | namespace libt2n | |
45 | { | |
46 | ||
28cb45a5 | 47 | command_server::command_server(server& _s) |
3b2543e7 | 48 | : s(_s), guard_handle(0) |
28cb45a5 GE |
49 | { |
50 | // register callback | |
8104c8f7 | 51 | s.add_callback(new_connection,bind(&command_server::send_hello, boost::ref(*this), _1)); |
28cb45a5 GE |
52 | } |
53 | ||
56f3994d TJ |
54 | /** |
55 | * Destructor | |
56 | */ | |
57 | command_server::~command_server() | |
58 | { | |
59 | } | |
60 | ||
487afb79 | 61 | /// send a hello message to a new connection |
8104c8f7 | 62 | void command_server::send_hello(unsigned int conn_id) |
28cb45a5 | 63 | { |
8104c8f7 | 64 | server_connection* sc=s.get_connection(conn_id); |
1bdd13c0 GE |
65 | |
66 | if (!sc) | |
67 | return; // connection not existing, so no hello | |
8104c8f7 | 68 | |
539b09c0 | 69 | std::ostringstream hello; |
8104c8f7 GE |
70 | |
71 | hello << "T2Nv" << PROTOCOL_VERSION << ';'; | |
72 | ||
73 | int byteordercheck=1; | |
74 | hello.write((char*)&byteordercheck,sizeof(byteordercheck)); | |
75 | ||
76 | hello << ';'; | |
77 | ||
78 | sc->write(hello.str()); | |
28cb45a5 GE |
79 | } |
80 | ||
7087e187 GE |
81 | /// handle a command including deserialization and answering |
82 | void command_server::handle_packet(const std::string& packet, server_connection* conn) | |
83 | { | |
a7170401 GE |
84 | OBJLOGSTREAM(s,debug,"handling packet from connection " << conn->get_id()); |
85 | ||
7087e187 | 86 | // deserialize packet |
539b09c0 | 87 | std::istringstream ifs(packet); |
7087e187 GE |
88 | boost::archive::binary_iarchive ia(ifs); |
89 | command_container ccont; | |
01a46463 | 90 | result_container res; |
7087e187 | 91 | |
01a46463 | 92 | try |
d535333f | 93 | { |
01a46463 | 94 | ia >> ccont; |
d535333f | 95 | } |
01a46463 GE |
96 | catch(boost::archive::archive_exception &e) |
97 | { | |
539b09c0 | 98 | std::ostringstream msg; |
01a46463 GE |
99 | msg << "archive_exception while deserializing on server-side, " |
100 | "code " << e.code << " (" << e.what() << ")"; | |
101 | res.set_exception(new t2n_serialization_error(msg.str())); | |
102 | } | |
d535333f | 103 | |
01a46463 GE |
104 | if (!res.has_exception()) |
105 | { | |
106 | std::ostream* ostr; | |
107 | if ((ostr=s.get_logstream(fulldebug))!=NULL) | |
108 | { | |
109 | (*ostr) << "decoded packet data: " << std::endl; | |
110 | boost::archive::xml_oarchive xo(*ostr); | |
111 | xo << BOOST_SERIALIZATION_NVP(ccont); | |
112 | } | |
7087e187 | 113 | |
539b09c0 | 114 | command* cmd=cast_command(ccont.get_command()); |
7087e187 | 115 | |
01a46463 | 116 | if (cmd) |
7087e187 | 117 | { |
01a46463 GE |
118 | try |
119 | { | |
120 | res.set_result((*cmd)()); | |
121 | } | |
122 | catch (t2n_exception &e) | |
123 | { res.set_exception(e.clone()); } | |
7087e187 | 124 | } |
01a46463 | 125 | else |
539b09c0 GE |
126 | { |
127 | std::ostringstream msg; | |
128 | if (ccont.get_command()!=NULL) | |
129 | msg << "illegal command of type " << typeid(ccont.get_command()).name() << " called"; | |
130 | else | |
131 | msg << "NULL command called"; | |
132 | res.set_exception(new t2n_command_error(msg.str())); | |
133 | } | |
7087e187 | 134 | } |
7087e187 | 135 | |
539b09c0 | 136 | std::ostringstream ofs; |
7087e187 GE |
137 | boost::archive::binary_oarchive oa(ofs); |
138 | ||
01a46463 GE |
139 | try |
140 | { | |
141 | oa << res; | |
142 | } | |
143 | catch(boost::archive::archive_exception &e) | |
144 | { | |
539b09c0 | 145 | std::ostringstream msg; |
01a46463 GE |
146 | msg << "archive_exception while serializing on server-side, " |
147 | "code " << e.code << " (" << e.what() << ")"; | |
148 | res.set_exception(new t2n_serialization_error(msg.str())); | |
149 | oa << res; | |
150 | } | |
7087e187 | 151 | |
01a46463 | 152 | std::ostream* ostr; |
d535333f GE |
153 | if ((ostr=s.get_logstream(fulldebug))!=NULL) |
154 | { | |
155 | (*ostr) << "returning result, decoded data: " << std::endl; | |
156 | boost::archive::xml_oarchive xo(*ostr); | |
157 | xo << BOOST_SERIALIZATION_NVP(res); | |
158 | } | |
159 | ||
7087e187 GE |
160 | conn->write(ofs.str()); |
161 | } | |
162 | ||
163 | /** @brief handle incoming commands | |
45a2ebc9 GE |
164 | @param[in,out] usec_timeout wait until new data is found, max timeout usecs. |
165 | -1: wait endless, 0: instant return | |
9a5d7790 | 166 | @param[out] usec_timeout_remaining microseconds from the timeout that were not used |
7087e187 | 167 | */ |
45a2ebc9 | 168 | void command_server::handle(long long usec_timeout, long long* usec_timeout_remaining) |
7087e187 | 169 | { |
3b2543e7 | 170 | guard_handle++; |
56f3994d | 171 | |
3b2543e7 | 172 | try |
7087e187 | 173 | { |
3b2543e7 | 174 | if (s.fill_buffer(usec_timeout,usec_timeout_remaining)) |
c7857475 | 175 | { |
3b2543e7 | 176 | std::string packet; |
56f3994d | 177 | unsigned int conn_id = 0; |
c7857475 | 178 | |
3b2543e7 | 179 | while (s.get_packet(packet,conn_id)) |
c7857475 | 180 | { |
3b2543e7 GE |
181 | server_connection* conn=s.get_connection(conn_id); |
182 | if (!conn) | |
183 | EXCEPTIONSTREAM(error,logic_error,"illegal connection id " << conn_id << " received"); | |
3b2543e7 GE |
184 | try |
185 | { handle_packet(packet,conn); } | |
186 | catch (t2n_transfer_error &e) | |
187 | { | |
188 | // shut down a connection with transfer errors (usually write errors) | |
189 | conn->close(); | |
190 | } | |
c7857475 | 191 | } |
c7857475 | 192 | } |
7087e187 | 193 | } |
3b2543e7 GE |
194 | catch(...) |
195 | { | |
196 | guard_handle--; | |
197 | throw; | |
198 | } | |
199 | guard_handle--; | |
200 | ||
201 | // don't call cleanup on re-entered handle-calls | |
202 | if (guard_handle == 0) | |
203 | s.cleanup(); | |
7087e187 GE |
204 | } |
205 | ||
206 | } |