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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 | ||
0cf4dc9b GE |
20 | #include <stdio.h> |
21 | #include <errno.h> | |
22 | #include <stdlib.h> | |
23 | #include <unistd.h> | |
24 | #include <sys/types.h> | |
25 | #include <sys/socket.h> | |
26 | #include <sys/un.h> | |
27 | #include <sys/time.h> | |
28 | #include <arpa/inet.h> | |
29 | #include <netinet/in.h> | |
30 | #include <netdb.h> | |
31 | #include <fcntl.h> | |
32 | #include <time.h> | |
33 | #include <pwd.h> | |
34 | #include <grp.h> | |
35 | ||
aa499d20 GE |
36 | #include <sstream> |
37 | ||
ac7fdc22 | 38 | #include "socket_server.hxx" |
0cf4dc9b GE |
39 | #include "t2n_exception.hxx" |
40 | ||
41 | using namespace std; | |
ac7fdc22 GE |
42 | |
43 | namespace libt2n | |
44 | { | |
45 | ||
94247295 GE |
46 | /** @brief create a new tcp-based server |
47 | @param port tcp port you want to listen on | |
48 | @param ip the local ip you want to listen on. "0.0.0.0" means all local ips (default). | |
49 | */ | |
644c4d26 | 50 | socket_server::socket_server(int port, const std::string& ip) |
a11e19b7 | 51 | : server(), socket_handler(0,tcp_s) |
ac7fdc22 | 52 | { |
a11e19b7 | 53 | // TODO |
ac7fdc22 GE |
54 | } |
55 | ||
94247295 GE |
56 | /** @brief create a new unix-socked-based server |
57 | @param path path of the socket | |
58 | @param filemode permissions you want to open the socket with | |
59 | @param user local username for the socket | |
60 | @param group local groupname for the socket | |
61 | */ | |
644c4d26 | 62 | socket_server::socket_server(const std::string& path, mode_t filemode, const std::string& user, const std::string& group) |
a11e19b7 | 63 | : server(), socket_handler(0,unix_s) |
ac7fdc22 | 64 | { |
ac7fdc22 GE |
65 | unix_path=path; |
66 | ||
ac7fdc22 | 67 | /* Create the socket. */ |
0cf4dc9b GE |
68 | sock = socket (PF_UNIX, SOCK_STREAM, 0); |
69 | if (sock < 0) | |
ac7fdc22 GE |
70 | { |
71 | string err="error opening socket: "; | |
0cf4dc9b GE |
72 | err+=strerror(errno); |
73 | log(error, err); | |
74 | throw t2n_server_error(err); | |
75 | } | |
76 | ||
77 | set_socket_options(sock); | |
78 | ||
79 | /* Give the socket a name. */ | |
80 | struct sockaddr_un unix_name; | |
81 | unix_name.sun_family = AF_UNIX; | |
82 | strncpy (unix_name.sun_path, unix_path.c_str(),sizeof(unix_name.sun_path)); | |
83 | ||
84 | /* just to make sure there is no other socket file */ | |
85 | unlink (unix_name.sun_path); | |
86 | ||
87 | if (bind (sock, (struct sockaddr *) &unix_name, sizeof (unix_name)) < 0) | |
88 | { | |
89 | string err="error binding socket: "; | |
90 | err+=strerror(errno); | |
91 | log(error, err); | |
92 | throw t2n_server_error(err); | |
93 | } | |
94 | ||
95 | /* change permissions */ | |
96 | if (chmod (unix_name.sun_path, filemode) != 0) | |
97 | { | |
98 | string err="error changing permission: "; | |
99 | err+=strerror(errno); | |
100 | log(error, err); | |
101 | throw t2n_server_error(err); | |
102 | } | |
103 | ||
644c4d26 | 104 | if (!user.empty() && !group.empty()) |
0cf4dc9b | 105 | { |
644c4d26 | 106 | // TODO maybe use current user/group if one of them is empty |
0cf4dc9b | 107 | |
644c4d26 GE |
108 | struct passwd *socket_user = getpwnam (user.c_str()); |
109 | if (socket_user == NULL) | |
110 | { | |
111 | string err="error getting socket user: "; | |
112 | err+=strerror(errno); | |
113 | log(error, err); | |
114 | throw t2n_server_error(err); | |
115 | } | |
116 | ||
117 | struct group *socket_group = getgrnam (group.c_str()); | |
118 | if (socket_group == NULL) | |
119 | { | |
120 | string err="error getting socket group: "; | |
121 | err+=strerror(errno); | |
122 | log(error, err); | |
123 | throw t2n_server_error(err); | |
124 | } | |
125 | ||
126 | if (chown (unix_name.sun_path, socket_user->pw_uid, socket_group->gr_gid) != 0) | |
127 | { | |
128 | string err="error changing socket ownership: "; | |
129 | err+=strerror(errno); | |
130 | log(error, err); | |
131 | throw t2n_server_error(err); | |
132 | } | |
0cf4dc9b GE |
133 | } |
134 | ||
135 | if (listen (sock, 5) < 0) | |
136 | { | |
137 | string err="error listening to socket: "; | |
138 | err+=strerror(errno); | |
139 | log(error, err); | |
140 | throw t2n_server_error(err); | |
141 | } | |
142 | ||
143 | /* clear & insert server sock into the fd_tab to prepare select */ | |
144 | FD_ZERO(&connection_set); | |
145 | FD_SET (sock, &connection_set); | |
146 | } | |
147 | ||
ac7fdc22 GE |
148 | socket_server::~socket_server() |
149 | { | |
644c4d26 GE |
150 | socket_handler::close(); |
151 | ||
a11e19b7 | 152 | if (get_type()==unix_s) |
ac7fdc22 GE |
153 | unlink(unix_path.c_str()); |
154 | } | |
155 | ||
0cf4dc9b GE |
156 | void socket_server::new_connection() |
157 | { | |
04e6b271 | 158 | struct sockaddr_un clientname; |
ac7fdc22 | 159 | |
04e6b271 GE |
160 | unsigned int size = sizeof (clientname); |
161 | int newsock = accept (sock,(struct sockaddr *) &clientname,&size); | |
162 | if (newsock < 0) | |
163 | { | |
164 | if (errno == EAGAIN) | |
165 | { | |
166 | log(error, "accept error (EAGAIN): no connection waiting"); | |
167 | return; | |
168 | } | |
169 | ||
170 | /* default: break */ | |
171 | string err="error accepting connection: "; | |
172 | err+=strerror(errno); | |
173 | log(error, err); | |
174 | throw t2n_server_error(err); | |
175 | } | |
176 | ||
177 | FD_SET (newsock, &connection_set); | |
178 | ||
a11e19b7 GE |
179 | socket_server_connection *nc=new socket_server_connection(newsock, get_type(), get_default_timeout()); |
180 | nc->set_socket_options(newsock); | |
04e6b271 | 181 | |
a11e19b7 | 182 | add_connection(nc); |
04e6b271 GE |
183 | |
184 | return; | |
0cf4dc9b | 185 | } |
ac7fdc22 | 186 | |
94247295 | 187 | bool socket_server::fill_buffer(long long usec_timeout) |
ac7fdc22 | 188 | { |
0cf4dc9b GE |
189 | fd_set used_fdset=connection_set; |
190 | ||
191 | /* set timeout */ | |
192 | struct timeval tval; | |
193 | struct timeval *timeout_ptr; | |
194 | ||
195 | if (usec_timeout == -1) | |
196 | timeout_ptr = NULL; | |
197 | else | |
198 | { | |
199 | timeout_ptr = &tval; | |
200 | ||
201 | // timeout von long long usec in int sec + int usec umrechnen | |
202 | tval.tv_sec = usec_timeout / 1000000; | |
203 | tval.tv_usec = usec_timeout % 1000000; | |
204 | } | |
205 | ||
206 | int ret=select (FD_SETSIZE, &used_fdset, NULL, NULL, timeout_ptr); | |
207 | ||
208 | if (ret < 0) | |
209 | { | |
210 | if (errno == EINTR) | |
211 | { | |
212 | // select interrupted by signal | |
213 | ret=0; | |
214 | } | |
215 | else | |
216 | { | |
217 | string err="select error: "; | |
218 | err+=strerror(errno); | |
219 | log(error, err); | |
220 | throw t2n_server_error(err); | |
221 | } | |
222 | } | |
223 | ||
224 | if (ret > 0) | |
225 | { | |
226 | // we have data pending | |
227 | ||
228 | // check for new connection | |
229 | if (FD_ISSET (sock, &used_fdset)) | |
230 | { | |
231 | new_connection(); | |
232 | } | |
233 | ||
234 | // check all connections for pending data | |
94247295 | 235 | return fill_connection_buffers(); |
0cf4dc9b | 236 | } |
ac7fdc22 | 237 | |
94247295 | 238 | return false; |
ac7fdc22 GE |
239 | } |
240 | ||
94247295 | 241 | bool socket_server::fill_connection_buffers() |
aa499d20 | 242 | { |
94247295 GE |
243 | bool data_found; |
244 | ||
a11e19b7 GE |
245 | std::map<unsigned int, server_connection*>::iterator ie=connections.end(); |
246 | for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++) | |
644c4d26 | 247 | if (!i->second->server_connection::is_closed()) |
94247295 GE |
248 | if (i->second->fill_buffer(0)) |
249 | data_found=true; | |
250 | ||
251 | return data_found; | |
aa499d20 GE |
252 | } |
253 | ||
a11e19b7 | 254 | void socket_server::remove_connection_socket(int sock) |
ac7fdc22 | 255 | { |
a11e19b7 | 256 | FD_CLR(sock, &connection_set); |
ac7fdc22 GE |
257 | } |
258 | ||
644c4d26 GE |
259 | void socket_server_connection::log(log_level_values level, const char* message) |
260 | { | |
261 | if(my_server) | |
262 | { | |
263 | ostringstream msg; | |
264 | msg << "connection id " << get_id() << ": " << message; | |
265 | my_server->log(level,msg.str().c_str()); | |
266 | } | |
267 | } | |
268 | ||
a11e19b7 | 269 | void socket_server_connection::close() |
ac7fdc22 | 270 | { |
644c4d26 | 271 | if (!server_connection::is_closed()) |
aa499d20 | 272 | { |
a11e19b7 GE |
273 | socket_handler::close(); |
274 | server_connection::close(); | |
aa499d20 GE |
275 | } |
276 | ||
a11e19b7 | 277 | if (my_server) |
aa499d20 | 278 | { |
a11e19b7 | 279 | dynamic_cast<socket_server*>(my_server)->remove_connection_socket(sock); |
aa499d20 | 280 | } |
ac7fdc22 GE |
281 | } |
282 | ||
283 | } |