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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 | ||
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 | ||
45a2ebc9 | 54 | std::string command_client::read_packet(const long long &usec_timeout) |
8104c8f7 | 55 | { |
8104c8f7 | 56 | string resultpacket; |
45a2ebc9 GE |
57 | bool got_packet=false; |
58 | long long my_timeout=usec_timeout; | |
59 | while(!(got_packet=c.get_packet(resultpacket)) && my_timeout > 0 && !c.is_closed()) | |
60 | c.fill_buffer(my_timeout,&my_timeout); | |
8104c8f7 | 61 | |
45a2ebc9 GE |
62 | if (!got_packet) |
63 | throw t2n_transfer_error("timeout exceeded"); | |
64 | ||
65 | return resultpacket; | |
66 | } | |
67 | ||
68 | void command_client::read_hello() | |
69 | { | |
b2ba0928 GE |
70 | string resultpacket; |
71 | bool got_packet=false; | |
72 | long long my_timeout=hello_timeout_usec; | |
73 | while(!(got_packet=c.get_packet(resultpacket)) && my_timeout > 0 && !c.is_closed()) | |
74 | { | |
75 | c.fill_buffer(my_timeout,&my_timeout); | |
76 | ||
77 | c.peek_packet(resultpacket); | |
78 | check_hello(resultpacket); // will throw before timeout if wrong data received | |
79 | } | |
80 | ||
81 | if (!got_packet) | |
82 | throw t2n_transfer_error("timeout exceeded"); | |
83 | ||
84 | if (!check_hello(resultpacket)) | |
85 | throw t2n_version_mismatch("illegal hello received (incomplete): "+resultpacket); | |
86 | } | |
87 | ||
88 | bool command_client::check_hello(const string& hellostr) | |
89 | { | |
90 | istringstream hello(hellostr); | |
8104c8f7 | 91 | |
b2ba0928 GE |
92 | char chk; |
93 | ||
94 | if (hello.read(&chk,1)) | |
95 | { | |
96 | if (chk != 'T') | |
97 | throw t2n_version_mismatch("illegal hello received (T2N)"); | |
98 | } | |
99 | else | |
100 | return false; | |
101 | ||
102 | if (hello.read(&chk,1)) | |
103 | { | |
104 | if (chk != '2') | |
105 | throw t2n_version_mismatch("illegal hello received (T2N)"); | |
106 | } | |
107 | else | |
108 | return false; | |
109 | ||
110 | if (hello.read(&chk,1)) | |
111 | { | |
112 | if (chk != 'N') | |
113 | throw t2n_version_mismatch("illegal hello received (T2N)"); | |
114 | } | |
115 | else | |
116 | return false; | |
117 | ||
118 | if (hello.read(&chk,1)) | |
119 | { | |
120 | if (chk != 'v') | |
121 | throw t2n_version_mismatch("illegal hello received (T2N)"); | |
122 | } | |
123 | else | |
124 | return false; | |
8104c8f7 GE |
125 | |
126 | int prot_version; | |
b2ba0928 GE |
127 | if (hello >> prot_version) |
128 | { | |
129 | if (prot_version != PROTOCOL_VERSION) | |
130 | throw t2n_version_mismatch("not compatible with the server protocol version"); | |
131 | } | |
132 | else | |
133 | return false; | |
134 | ||
135 | if (hello.read(&chk,1)) | |
136 | { | |
137 | if (chk != ';') | |
138 | throw t2n_version_mismatch("illegal hello received (1. ;)"); | |
139 | } | |
140 | else | |
141 | return false; | |
8104c8f7 | 142 | |
b2ba0928 GE |
143 | unsigned int hbo; |
144 | if (hello.read((char*)&hbo,sizeof(hbo))) | |
145 | { | |
146 | if (hbo != 1) | |
147 | throw t2n_version_mismatch("host byte order not matching"); | |
148 | } | |
149 | else | |
150 | return false; | |
8104c8f7 | 151 | |
b2ba0928 GE |
152 | if (hello.read(&chk,1)) |
153 | { | |
154 | if (chk != ';') | |
155 | throw t2n_version_mismatch("illegal hello received (2. ;)"); | |
156 | } | |
157 | else | |
158 | return false; | |
8104c8f7 | 159 | |
b2ba0928 | 160 | return true; |
8104c8f7 GE |
161 | } |
162 | ||
7087e187 GE |
163 | void command_client::send_command(command* cmd, result_container &res) |
164 | { | |
165 | ostringstream ofs; | |
166 | command_container cc(cmd); | |
167 | boost::archive::binary_oarchive oa(ofs); | |
168 | ||
45a2ebc9 GE |
169 | try |
170 | { | |
171 | oa << cc; | |
172 | } | |
173 | catch(boost::archive::archive_exception &e) | |
174 | { | |
175 | ostringstream msg; | |
176 | msg << "archive_exception while serializing on client-side, code " << e.code << " (" << e.what() << ")"; | |
177 | throw t2n_serialization_error(msg.str()); | |
178 | } | |
179 | catch(...) | |
180 | { throw; } | |
7087e187 | 181 | |
d535333f GE |
182 | std::ostream* ostr; |
183 | if ((ostr=c.get_logstream(fulldebug))!=NULL) | |
184 | { | |
185 | (*ostr) << "sending command, decoded data: " << std::endl; | |
186 | boost::archive::xml_oarchive xo(*ostr); | |
187 | xo << BOOST_SERIALIZATION_NVP(cc); | |
188 | } | |
189 | ||
7087e187 GE |
190 | c.write(ofs.str()); |
191 | ||
45a2ebc9 | 192 | istringstream ifs(read_packet(command_timeout_usec)); |
7087e187 GE |
193 | boost::archive::binary_iarchive ia(ifs); |
194 | ||
45a2ebc9 GE |
195 | try |
196 | { | |
197 | ia >> res; | |
198 | } | |
199 | catch(boost::archive::archive_exception &e) | |
200 | { | |
201 | ostringstream msg; | |
202 | msg << "archive_exception while deserializing on client-side, code " << e.code << " (" << e.what() << ")"; | |
203 | throw t2n_serialization_error(msg.str()); | |
204 | } | |
205 | catch(...) | |
206 | { throw; } | |
d535333f GE |
207 | |
208 | if ((ostr=c.get_logstream(fulldebug))!=NULL) | |
209 | { | |
210 | (*ostr) << "received result, decoded data: " << std::endl; | |
211 | boost::archive::xml_oarchive xo(*ostr); | |
212 | xo << BOOST_SERIALIZATION_NVP(res); | |
213 | } | |
7087e187 GE |
214 | } |
215 | ||
216 | } |