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7087e187 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 | ||
20 | #include <string> | |
21 | #include <sstream> | |
22 | ||
23 | #include <boost/archive/binary_oarchive.hpp> | |
24 | #include <boost/archive/binary_iarchive.hpp> | |
25 | #include <boost/archive/xml_oarchive.hpp> | |
26 | #include <boost/archive/xml_iarchive.hpp> | |
27 | #include <boost/serialization/serialization.hpp> | |
7087e187 | 28 | |
8104c8f7 GE |
29 | #include <boost/bind.hpp> |
30 | ||
7087e187 GE |
31 | #include "command_client.hxx" |
32 | ||
8104c8f7 GE |
33 | #ifdef HAVE_CONFIG_H |
34 | #include <config.h> | |
35 | #endif | |
36 | ||
7087e187 GE |
37 | using namespace std; |
38 | ||
39 | namespace libt2n | |
40 | { | |
41 | ||
fb3345ad | 42 | command_client::command_client(client_connection* _c, long long _command_timeout_usec, long long _hello_timeout_usec) |
8104c8f7 GE |
43 | : c(_c) |
44 | { | |
45a2ebc9 GE |
45 | command_timeout_usec=_command_timeout_usec; |
46 | hello_timeout_usec=_hello_timeout_usec; | |
47 | ||
8104c8f7 | 48 | // for reconnects |
fb3345ad | 49 | c->add_callback(new_connection,bind(&command_client::read_hello, boost::ref(*this))); |
8104c8f7 | 50 | |
fb3345ad | 51 | // don't expect hello from an always closed connection (like dummy_client_connection) |
b5922184 GE |
52 | if (!is_connection_closed()) |
53 | { | |
54 | try | |
55 | { | |
56 | read_hello(); | |
57 | } | |
58 | catch (t2n_communication_error &e) | |
59 | { | |
60 | c->close(); | |
61 | ||
62 | // store a copy of the exception that you can find out details about the error later | |
63 | std::auto_ptr<t2n_exception> tmp(e.clone()); | |
64 | constructorException=tmp; | |
65 | } | |
66 | catch (...) | |
67 | { | |
68 | throw; | |
69 | } | |
70 | } | |
8104c8f7 GE |
71 | } |
72 | ||
af84dfb5 GE |
73 | /** @brief replace the connection currently in use with a new one |
74 | ||
fb3345ad | 75 | @param _c pointer to the new connection |
af84dfb5 GE |
76 | |
77 | @note the old connection must still be valid when this method is called, | |
78 | it can safely be deleted after this method returned | |
79 | ||
80 | @note all callbacks registered on the old connection will be copied over | |
81 | to the new one | |
82 | */ | |
fb3345ad | 83 | void command_client::replace_connection(client_connection* _c) |
af84dfb5 GE |
84 | { |
85 | // copy all callbacks registered on the old connection | |
86 | for(callback_event_type e=static_cast<callback_event_type>(0); | |
87 | e < __events_end; | |
88 | e=static_cast<callback_event_type>(static_cast<int>(e)+1)) | |
89 | { | |
fb3345ad | 90 | list<boost::function<void ()> > evcb=c->get_callback_list(e); |
af84dfb5 GE |
91 | |
92 | for (list<boost::function<void ()> >::iterator i=evcb.begin(); i != evcb.end(); i++) | |
fb3345ad | 93 | _c->add_callback(e,*i); |
af84dfb5 GE |
94 | } |
95 | ||
96 | // replace the connection | |
97 | c=_c; | |
98 | ||
99 | read_hello(); | |
100 | } | |
101 | ||
45a2ebc9 | 102 | std::string command_client::read_packet(const long long &usec_timeout) |
8104c8f7 | 103 | { |
8104c8f7 | 104 | string resultpacket; |
45a2ebc9 GE |
105 | bool got_packet=false; |
106 | long long my_timeout=usec_timeout; | |
fb3345ad GE |
107 | while(!(got_packet=c->get_packet(resultpacket)) && my_timeout > 0 && !c->is_closed()) |
108 | c->fill_buffer(my_timeout,&my_timeout); | |
8104c8f7 | 109 | |
45a2ebc9 GE |
110 | if (!got_packet) |
111 | throw t2n_transfer_error("timeout exceeded"); | |
112 | ||
113 | return resultpacket; | |
114 | } | |
115 | ||
116 | void command_client::read_hello() | |
117 | { | |
b2ba0928 GE |
118 | string resultpacket; |
119 | bool got_packet=false; | |
120 | long long my_timeout=hello_timeout_usec; | |
fb3345ad | 121 | while(!(got_packet=c->get_packet(resultpacket)) && my_timeout > 0 && !c->is_closed()) |
b2ba0928 | 122 | { |
fb3345ad | 123 | c->fill_buffer(my_timeout,&my_timeout); |
b2ba0928 | 124 | |
fb3345ad | 125 | c->peek_packet(resultpacket); |
b2ba0928 GE |
126 | check_hello(resultpacket); // will throw before timeout if wrong data received |
127 | } | |
128 | ||
129 | if (!got_packet) | |
130 | throw t2n_transfer_error("timeout exceeded"); | |
131 | ||
132 | if (!check_hello(resultpacket)) | |
133 | throw t2n_version_mismatch("illegal hello received (incomplete): "+resultpacket); | |
134 | } | |
135 | ||
136 | bool command_client::check_hello(const string& hellostr) | |
137 | { | |
138 | istringstream hello(hellostr); | |
8104c8f7 | 139 | |
b2ba0928 GE |
140 | char chk; |
141 | ||
142 | if (hello.read(&chk,1)) | |
143 | { | |
144 | if (chk != 'T') | |
145 | throw t2n_version_mismatch("illegal hello received (T2N)"); | |
146 | } | |
147 | else | |
148 | return false; | |
149 | ||
150 | if (hello.read(&chk,1)) | |
151 | { | |
152 | if (chk != '2') | |
153 | throw t2n_version_mismatch("illegal hello received (T2N)"); | |
154 | } | |
155 | else | |
156 | return false; | |
157 | ||
158 | if (hello.read(&chk,1)) | |
159 | { | |
160 | if (chk != 'N') | |
161 | throw t2n_version_mismatch("illegal hello received (T2N)"); | |
162 | } | |
163 | else | |
164 | return false; | |
165 | ||
166 | if (hello.read(&chk,1)) | |
167 | { | |
168 | if (chk != 'v') | |
169 | throw t2n_version_mismatch("illegal hello received (T2N)"); | |
170 | } | |
171 | else | |
172 | return false; | |
8104c8f7 GE |
173 | |
174 | int prot_version; | |
b2ba0928 GE |
175 | if (hello >> prot_version) |
176 | { | |
177 | if (prot_version != PROTOCOL_VERSION) | |
178 | throw t2n_version_mismatch("not compatible with the server protocol version"); | |
179 | } | |
180 | else | |
181 | return false; | |
182 | ||
183 | if (hello.read(&chk,1)) | |
184 | { | |
185 | if (chk != ';') | |
186 | throw t2n_version_mismatch("illegal hello received (1. ;)"); | |
187 | } | |
188 | else | |
189 | return false; | |
8104c8f7 | 190 | |
b2ba0928 GE |
191 | unsigned int hbo; |
192 | if (hello.read((char*)&hbo,sizeof(hbo))) | |
193 | { | |
194 | if (hbo != 1) | |
195 | throw t2n_version_mismatch("host byte order not matching"); | |
196 | } | |
197 | else | |
198 | return false; | |
8104c8f7 | 199 | |
b2ba0928 GE |
200 | if (hello.read(&chk,1)) |
201 | { | |
202 | if (chk != ';') | |
203 | throw t2n_version_mismatch("illegal hello received (2. ;)"); | |
204 | } | |
205 | else | |
206 | return false; | |
8104c8f7 | 207 | |
b2ba0928 | 208 | return true; |
8104c8f7 GE |
209 | } |
210 | ||
7087e187 GE |
211 | void command_client::send_command(command* cmd, result_container &res) |
212 | { | |
213 | ostringstream ofs; | |
214 | command_container cc(cmd); | |
215 | boost::archive::binary_oarchive oa(ofs); | |
216 | ||
b5922184 GE |
217 | if (is_connection_closed()) |
218 | throw t2n_transfer_error("connection to server is closed"); | |
219 | ||
45a2ebc9 GE |
220 | try |
221 | { | |
222 | oa << cc; | |
223 | } | |
224 | catch(boost::archive::archive_exception &e) | |
225 | { | |
226 | ostringstream msg; | |
227 | msg << "archive_exception while serializing on client-side, code " << e.code << " (" << e.what() << ")"; | |
228 | throw t2n_serialization_error(msg.str()); | |
229 | } | |
230 | catch(...) | |
231 | { throw; } | |
7087e187 | 232 | |
d535333f | 233 | std::ostream* ostr; |
fb3345ad | 234 | if ((ostr=c->get_logstream(fulldebug))!=NULL) |
d535333f GE |
235 | { |
236 | (*ostr) << "sending command, decoded data: " << std::endl; | |
237 | boost::archive::xml_oarchive xo(*ostr); | |
238 | xo << BOOST_SERIALIZATION_NVP(cc); | |
239 | } | |
240 | ||
fb3345ad | 241 | c->write(ofs.str()); |
7087e187 | 242 | |
45a2ebc9 | 243 | istringstream ifs(read_packet(command_timeout_usec)); |
7087e187 GE |
244 | boost::archive::binary_iarchive ia(ifs); |
245 | ||
45a2ebc9 GE |
246 | try |
247 | { | |
248 | ia >> res; | |
249 | } | |
250 | catch(boost::archive::archive_exception &e) | |
251 | { | |
252 | ostringstream msg; | |
253 | msg << "archive_exception while deserializing on client-side, code " << e.code << " (" << e.what() << ")"; | |
254 | throw t2n_serialization_error(msg.str()); | |
255 | } | |
256 | catch(...) | |
257 | { throw; } | |
d535333f | 258 | |
fb3345ad | 259 | if ((ostr=c->get_logstream(fulldebug))!=NULL) |
d535333f GE |
260 | { |
261 | (*ostr) << "received result, decoded data: " << std::endl; | |
262 | boost::archive::xml_oarchive xo(*ostr); | |
263 | xo << BOOST_SERIALIZATION_NVP(res); | |
264 | } | |
7087e187 GE |
265 | } |
266 | ||
267 | } |