Commit | Line | Data |
---|---|---|
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 | ||
45a2ebc9 | 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 GE |
48 | // for reconnects |
49 | c.add_callback(new_connection,bind(&command_client::read_hello, boost::ref(*this))); | |
50 | ||
51 | read_hello(); | |
52 | } | |
53 | ||
af84dfb5 GE |
54 | /** @brief replace the connection currently in use with a new one |
55 | ||
56 | @param _c reference of the new connection | |
57 | ||
58 | @note the old connection must still be valid when this method is called, | |
59 | it can safely be deleted after this method returned | |
60 | ||
61 | @note all callbacks registered on the old connection will be copied over | |
62 | to the new one | |
63 | */ | |
64 | void command_client::replace_connection(client_connection& _c) | |
65 | { | |
66 | // copy all callbacks registered on the old connection | |
67 | for(callback_event_type e=static_cast<callback_event_type>(0); | |
68 | e < __events_end; | |
69 | e=static_cast<callback_event_type>(static_cast<int>(e)+1)) | |
70 | { | |
71 | list<boost::function<void ()> > evcb=c.get_callback_list(e); | |
72 | ||
73 | for (list<boost::function<void ()> >::iterator i=evcb.begin(); i != evcb.end(); i++) | |
74 | _c.add_callback(e,*i); | |
75 | } | |
76 | ||
77 | // replace the connection | |
78 | c=_c; | |
79 | ||
80 | read_hello(); | |
81 | } | |
82 | ||
45a2ebc9 | 83 | std::string command_client::read_packet(const long long &usec_timeout) |
8104c8f7 | 84 | { |
8104c8f7 | 85 | string resultpacket; |
45a2ebc9 GE |
86 | bool got_packet=false; |
87 | long long my_timeout=usec_timeout; | |
88 | while(!(got_packet=c.get_packet(resultpacket)) && my_timeout > 0 && !c.is_closed()) | |
89 | c.fill_buffer(my_timeout,&my_timeout); | |
8104c8f7 | 90 | |
45a2ebc9 GE |
91 | if (!got_packet) |
92 | throw t2n_transfer_error("timeout exceeded"); | |
93 | ||
94 | return resultpacket; | |
95 | } | |
96 | ||
97 | void command_client::read_hello() | |
98 | { | |
b2ba0928 GE |
99 | string resultpacket; |
100 | bool got_packet=false; | |
101 | long long my_timeout=hello_timeout_usec; | |
102 | while(!(got_packet=c.get_packet(resultpacket)) && my_timeout > 0 && !c.is_closed()) | |
103 | { | |
104 | c.fill_buffer(my_timeout,&my_timeout); | |
105 | ||
106 | c.peek_packet(resultpacket); | |
107 | check_hello(resultpacket); // will throw before timeout if wrong data received | |
108 | } | |
109 | ||
110 | if (!got_packet) | |
111 | throw t2n_transfer_error("timeout exceeded"); | |
112 | ||
113 | if (!check_hello(resultpacket)) | |
114 | throw t2n_version_mismatch("illegal hello received (incomplete): "+resultpacket); | |
115 | } | |
116 | ||
117 | bool command_client::check_hello(const string& hellostr) | |
118 | { | |
119 | istringstream hello(hellostr); | |
8104c8f7 | 120 | |
b2ba0928 GE |
121 | char chk; |
122 | ||
123 | if (hello.read(&chk,1)) | |
124 | { | |
125 | if (chk != 'T') | |
126 | throw t2n_version_mismatch("illegal hello received (T2N)"); | |
127 | } | |
128 | else | |
129 | return false; | |
130 | ||
131 | if (hello.read(&chk,1)) | |
132 | { | |
133 | if (chk != '2') | |
134 | throw t2n_version_mismatch("illegal hello received (T2N)"); | |
135 | } | |
136 | else | |
137 | return false; | |
138 | ||
139 | if (hello.read(&chk,1)) | |
140 | { | |
141 | if (chk != 'N') | |
142 | throw t2n_version_mismatch("illegal hello received (T2N)"); | |
143 | } | |
144 | else | |
145 | return false; | |
146 | ||
147 | if (hello.read(&chk,1)) | |
148 | { | |
149 | if (chk != 'v') | |
150 | throw t2n_version_mismatch("illegal hello received (T2N)"); | |
151 | } | |
152 | else | |
153 | return false; | |
8104c8f7 GE |
154 | |
155 | int prot_version; | |
b2ba0928 GE |
156 | if (hello >> prot_version) |
157 | { | |
158 | if (prot_version != PROTOCOL_VERSION) | |
159 | throw t2n_version_mismatch("not compatible with the server protocol version"); | |
160 | } | |
161 | else | |
162 | return false; | |
163 | ||
164 | if (hello.read(&chk,1)) | |
165 | { | |
166 | if (chk != ';') | |
167 | throw t2n_version_mismatch("illegal hello received (1. ;)"); | |
168 | } | |
169 | else | |
170 | return false; | |
8104c8f7 | 171 | |
b2ba0928 GE |
172 | unsigned int hbo; |
173 | if (hello.read((char*)&hbo,sizeof(hbo))) | |
174 | { | |
175 | if (hbo != 1) | |
176 | throw t2n_version_mismatch("host byte order not matching"); | |
177 | } | |
178 | else | |
179 | return false; | |
8104c8f7 | 180 | |
b2ba0928 GE |
181 | if (hello.read(&chk,1)) |
182 | { | |
183 | if (chk != ';') | |
184 | throw t2n_version_mismatch("illegal hello received (2. ;)"); | |
185 | } | |
186 | else | |
187 | return false; | |
8104c8f7 | 188 | |
b2ba0928 | 189 | return true; |
8104c8f7 GE |
190 | } |
191 | ||
7087e187 GE |
192 | void command_client::send_command(command* cmd, result_container &res) |
193 | { | |
194 | ostringstream ofs; | |
195 | command_container cc(cmd); | |
196 | boost::archive::binary_oarchive oa(ofs); | |
197 | ||
45a2ebc9 GE |
198 | try |
199 | { | |
200 | oa << cc; | |
201 | } | |
202 | catch(boost::archive::archive_exception &e) | |
203 | { | |
204 | ostringstream msg; | |
205 | msg << "archive_exception while serializing on client-side, code " << e.code << " (" << e.what() << ")"; | |
206 | throw t2n_serialization_error(msg.str()); | |
207 | } | |
208 | catch(...) | |
209 | { throw; } | |
7087e187 | 210 | |
d535333f GE |
211 | std::ostream* ostr; |
212 | if ((ostr=c.get_logstream(fulldebug))!=NULL) | |
213 | { | |
214 | (*ostr) << "sending command, decoded data: " << std::endl; | |
215 | boost::archive::xml_oarchive xo(*ostr); | |
216 | xo << BOOST_SERIALIZATION_NVP(cc); | |
217 | } | |
218 | ||
7087e187 GE |
219 | c.write(ofs.str()); |
220 | ||
45a2ebc9 | 221 | istringstream ifs(read_packet(command_timeout_usec)); |
7087e187 GE |
222 | boost::archive::binary_iarchive ia(ifs); |
223 | ||
45a2ebc9 GE |
224 | try |
225 | { | |
226 | ia >> res; | |
227 | } | |
228 | catch(boost::archive::archive_exception &e) | |
229 | { | |
230 | ostringstream msg; | |
231 | msg << "archive_exception while deserializing on client-side, code " << e.code << " (" << e.what() << ")"; | |
232 | throw t2n_serialization_error(msg.str()); | |
233 | } | |
234 | catch(...) | |
235 | { throw; } | |
d535333f GE |
236 | |
237 | if ((ostr=c.get_logstream(fulldebug))!=NULL) | |
238 | { | |
239 | (*ostr) << "received result, decoded data: " << std::endl; | |
240 | boost::archive::xml_oarchive xo(*ostr); | |
241 | xo << BOOST_SERIALIZATION_NVP(res); | |
242 | } | |
7087e187 GE |
243 | } |
244 | ||
245 | } |