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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 | ||
ac7fdc22 | 36 | #include "socket_server.hxx" |
0cf4dc9b GE |
37 | #include "t2n_exception.hxx" |
38 | ||
39 | using namespace std; | |
ac7fdc22 GE |
40 | |
41 | namespace libt2n | |
42 | { | |
43 | ||
44 | socket_server::socket_server(int port, const char* ip) | |
45 | : server() | |
46 | { | |
0cf4dc9b | 47 | socket_type=tcp_s; |
ac7fdc22 GE |
48 | |
49 | } | |
50 | ||
0cf4dc9b | 51 | socket_server::socket_server(const char* path, mode_t filemode, const char* user, const char* group) |
ac7fdc22 GE |
52 | : server() |
53 | { | |
0cf4dc9b | 54 | socket_type=unix_s; |
ac7fdc22 GE |
55 | unix_path=path; |
56 | ||
ac7fdc22 | 57 | /* Create the socket. */ |
0cf4dc9b GE |
58 | sock = socket (PF_UNIX, SOCK_STREAM, 0); |
59 | if (sock < 0) | |
ac7fdc22 GE |
60 | { |
61 | string err="error opening socket: "; | |
0cf4dc9b GE |
62 | err+=strerror(errno); |
63 | log(error, err); | |
64 | throw t2n_server_error(err); | |
65 | } | |
66 | ||
67 | set_socket_options(sock); | |
68 | ||
69 | /* Give the socket a name. */ | |
70 | struct sockaddr_un unix_name; | |
71 | unix_name.sun_family = AF_UNIX; | |
72 | strncpy (unix_name.sun_path, unix_path.c_str(),sizeof(unix_name.sun_path)); | |
73 | ||
74 | /* just to make sure there is no other socket file */ | |
75 | unlink (unix_name.sun_path); | |
76 | ||
77 | if (bind (sock, (struct sockaddr *) &unix_name, sizeof (unix_name)) < 0) | |
78 | { | |
79 | string err="error binding socket: "; | |
80 | err+=strerror(errno); | |
81 | log(error, err); | |
82 | throw t2n_server_error(err); | |
83 | } | |
84 | ||
85 | /* change permissions */ | |
86 | if (chmod (unix_name.sun_path, filemode) != 0) | |
87 | { | |
88 | string err="error changing permission: "; | |
89 | err+=strerror(errno); | |
90 | log(error, err); | |
91 | throw t2n_server_error(err); | |
92 | } | |
93 | ||
94 | struct passwd *socket_user = getpwnam (user); | |
95 | if (socket_user == NULL) | |
96 | { | |
97 | string err="error getting socket user: "; | |
98 | err+=strerror(errno); | |
99 | log(error, err); | |
100 | throw t2n_server_error(err); | |
101 | } | |
102 | ||
103 | struct group *socket_group = getgrnam (group); | |
104 | if (socket_group == NULL) | |
105 | { | |
106 | string err="error getting socket group: "; | |
107 | err+=strerror(errno); | |
108 | log(error, err); | |
109 | throw t2n_server_error(err); | |
110 | } | |
111 | ||
112 | if (chown (unix_name.sun_path, socket_user->pw_uid, socket_group->gr_gid) != 0) | |
113 | { | |
114 | string err="error changing socket ownership: "; | |
115 | err+=strerror(errno); | |
116 | log(error, err); | |
117 | throw t2n_server_error(err); | |
118 | } | |
119 | ||
120 | if (listen (sock, 5) < 0) | |
121 | { | |
122 | string err="error listening to socket: "; | |
123 | err+=strerror(errno); | |
124 | log(error, err); | |
125 | throw t2n_server_error(err); | |
126 | } | |
127 | ||
128 | /* clear & insert server sock into the fd_tab to prepare select */ | |
129 | FD_ZERO(&connection_set); | |
130 | FD_SET (sock, &connection_set); | |
131 | } | |
132 | ||
133 | void socket_server::set_socket_options(int sock) | |
134 | { | |
135 | int i=1; | |
136 | ||
137 | /* fast reuse enable */ | |
138 | if (setsockopt(sock,SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i)) < 0) | |
139 | { | |
140 | string err="error setting socket option: "; | |
141 | err+=strerror(errno); | |
142 | log(error, err); | |
143 | throw t2n_server_error(err); | |
144 | } | |
ac7fdc22 | 145 | |
0cf4dc9b GE |
146 | /* keepalive enable */ |
147 | if (setsockopt(sock,SOL_SOCKET, SO_KEEPALIVE, &i, sizeof(i)) < 0) | |
148 | { | |
149 | string err="error setting socket option: "; | |
150 | err+=strerror(errno); | |
151 | log(error, err); | |
152 | throw t2n_server_error(err); | |
ac7fdc22 GE |
153 | } |
154 | ||
0cf4dc9b GE |
155 | /* close on exec */ |
156 | int fdflags; | |
157 | fdflags=fcntl(sock,F_GETFD, 0); | |
158 | if (fdflags < 0) | |
159 | { | |
160 | string err="fcntl error on socket: "; | |
161 | err+=strerror(errno); | |
162 | log(error, err); | |
163 | throw t2n_server_error(err); | |
164 | } | |
165 | fdflags |= FD_CLOEXEC; | |
166 | if (fcntl(sock,F_SETFD,fdflags) < 0) | |
167 | { | |
168 | string err="fcntl error on socket: "; | |
169 | err+=strerror(errno); | |
170 | log(error, err); | |
171 | throw t2n_server_error(err); | |
172 | } | |
173 | ||
174 | /* non-blocking mode */ | |
175 | int flflags; | |
176 | flflags=fcntl(sock,F_GETFL,0); | |
177 | if (flflags < 0) | |
178 | { | |
179 | string err="fcntl error on socket: "; | |
180 | err+=strerror(errno); | |
181 | log(error, err); | |
182 | throw t2n_server_error(err); | |
183 | } | |
184 | flflags |= O_NONBLOCK; | |
185 | if (fcntl(sock,F_SETFL,flflags) < 0) | |
186 | { | |
187 | string err="fcntl error on socket: "; | |
188 | err+=strerror(errno); | |
189 | log(error, err); | |
190 | throw t2n_server_error(err); | |
191 | } | |
ac7fdc22 GE |
192 | } |
193 | ||
194 | socket_server::~socket_server() | |
195 | { | |
0cf4dc9b | 196 | close(sock); |
ac7fdc22 | 197 | |
0cf4dc9b | 198 | if (socket_type==unix_s) |
ac7fdc22 GE |
199 | unlink(unix_path.c_str()); |
200 | } | |
201 | ||
0cf4dc9b GE |
202 | void socket_server::new_connection() |
203 | { | |
ac7fdc22 | 204 | |
0cf4dc9b | 205 | } |
ac7fdc22 GE |
206 | |
207 | void socket_server::fill_buffer(long long usec_timeout) | |
208 | { | |
0cf4dc9b GE |
209 | fd_set used_fdset=connection_set; |
210 | ||
211 | /* set timeout */ | |
212 | struct timeval tval; | |
213 | struct timeval *timeout_ptr; | |
214 | ||
215 | if (usec_timeout == -1) | |
216 | timeout_ptr = NULL; | |
217 | else | |
218 | { | |
219 | timeout_ptr = &tval; | |
220 | ||
221 | // timeout von long long usec in int sec + int usec umrechnen | |
222 | tval.tv_sec = usec_timeout / 1000000; | |
223 | tval.tv_usec = usec_timeout % 1000000; | |
224 | } | |
225 | ||
226 | int ret=select (FD_SETSIZE, &used_fdset, NULL, NULL, timeout_ptr); | |
227 | ||
228 | if (ret < 0) | |
229 | { | |
230 | if (errno == EINTR) | |
231 | { | |
232 | // select interrupted by signal | |
233 | ret=0; | |
234 | } | |
235 | else | |
236 | { | |
237 | string err="select error: "; | |
238 | err+=strerror(errno); | |
239 | log(error, err); | |
240 | throw t2n_server_error(err); | |
241 | } | |
242 | } | |
243 | ||
244 | if (ret > 0) | |
245 | { | |
246 | // we have data pending | |
247 | ||
248 | // check for new connection | |
249 | if (FD_ISSET (sock, &used_fdset)) | |
250 | { | |
251 | new_connection(); | |
252 | } | |
253 | ||
254 | // check all connections for pending data | |
255 | fill_connection_buffers(); | |
256 | } | |
ac7fdc22 | 257 | |
0cf4dc9b | 258 | return; |
ac7fdc22 GE |
259 | } |
260 | ||
261 | socket_connection::socket_connection(int _socket, int _timeout) | |
262 | : connection(_timeout) | |
263 | { | |
264 | ||
265 | } | |
266 | ||
267 | void socket_connection::close() | |
268 | { | |
269 | ||
270 | } | |
271 | ||
272 | void socket_connection::fill_buffer(void) | |
273 | { | |
274 | ||
275 | } | |
276 | ||
277 | void socket_connection::write(const std::string& data) | |
278 | { | |
279 | ||
280 | } | |
281 | ||
282 | } |