1 |
/* |
2 |
vped.C -- the main file for gvpe |
3 |
Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl> |
4 |
2000-2002 Guus Sliepen <guus@sliepen.eu.org> |
5 |
2003-2005 Marc Lehmann <gvpe@schmorp.de> |
6 |
|
7 |
This file is part of GVPE. |
8 |
|
9 |
GVPE is free software; you can redistribute it and/or modify |
10 |
it under the terms of the GNU General Public License as published by |
11 |
the Free Software Foundation; either version 2 of the License, or |
12 |
(at your option) any later version. |
13 |
|
14 |
This program is distributed in the hope that it will be useful, |
15 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
17 |
GNU General Public License for more details. |
18 |
|
19 |
You should have received a copy of the GNU General Public License |
20 |
along with gvpe; if not, write to the Free Software |
21 |
Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
22 |
*/ |
23 |
|
24 |
#include "config.h" |
25 |
|
26 |
#include <cstdio> |
27 |
#include <cstring> |
28 |
#include <cstdlib> |
29 |
|
30 |
#include <errno.h> |
31 |
#include <fcntl.h> |
32 |
#include <getopt.h> |
33 |
#include <signal.h> |
34 |
#include <sys/types.h> |
35 |
#include <unistd.h> |
36 |
#include <signal.h> |
37 |
#include <termios.h> |
38 |
|
39 |
#if HAVE_SYS_MMAN_H |
40 |
# include <sys/mman.h> |
41 |
#endif |
42 |
|
43 |
#include <openssl/err.h> |
44 |
#include <openssl/rand.h> |
45 |
|
46 |
#include "gettext.h" |
47 |
#include "pidfile.h" |
48 |
|
49 |
#include "conf.h" |
50 |
#include "slog.h" |
51 |
#include "util.h" |
52 |
#include "vpn.h" |
53 |
#include "iom.h" |
54 |
|
55 |
static loglevel llevel = L_NONE; |
56 |
|
57 |
/* If nonzero, display usage information and exit. */ |
58 |
static int show_help; |
59 |
|
60 |
/* If nonzero, print the version on standard output and exit. */ |
61 |
static int show_version; |
62 |
|
63 |
/* If nonzero, disable swapping for this process. */ |
64 |
static int do_mlock = 0; |
65 |
|
66 |
/* If zero, don't detach from the terminal. */ |
67 |
static int do_detach = 1; |
68 |
|
69 |
static struct option const long_options[] = |
70 |
{ |
71 |
{"config", required_argument, NULL, 'c'}, |
72 |
{"help", no_argument, &show_help, 1}, |
73 |
{"version", no_argument, &show_version, 1}, |
74 |
{"no-detach", no_argument, &do_detach, 0}, |
75 |
{"log-level", required_argument, NULL, 'l'}, |
76 |
{"mlock", no_argument, &do_mlock, 1}, |
77 |
{NULL, 0, NULL, 0} |
78 |
}; |
79 |
|
80 |
static void |
81 |
usage (int status) |
82 |
{ |
83 |
if (status != 0) |
84 |
fprintf (stderr, _("Try `%s --help\' for more information.\n"), get_identity ()); |
85 |
else |
86 |
{ |
87 |
printf (_("Usage: %s [option]... NODENAME\n\n"), get_identity ()); |
88 |
printf (_ |
89 |
(" -c, --config=DIR Read configuration options from DIR.\n" |
90 |
" -D, --no-detach Don't fork and detach.\n" |
91 |
" -l, --log-level=LEVEL Set logging level (info, notice, warn are common).\n" |
92 |
" -L, --mlock Lock tinc into main memory.\n" |
93 |
" --help Display this help and exit.\n" |
94 |
" --version Output version information and exit.\n\n")); |
95 |
printf (_("Report bugs to <vpe@plan9.de>.\n")); |
96 |
} |
97 |
|
98 |
exit (status); |
99 |
} |
100 |
|
101 |
void |
102 |
parse_options (int argc, char **argv, char **envp) |
103 |
{ |
104 |
int r; |
105 |
int option_index = 0; |
106 |
|
107 |
while ((r = getopt_long (argc, argv, "-c:DLl:", long_options, &option_index)) != EOF) |
108 |
{ |
109 |
switch (r) |
110 |
{ |
111 |
case 0: /* long option */ |
112 |
break; |
113 |
|
114 |
case 1: /* this node name */ |
115 |
thisnode = strdup (optarg); |
116 |
break; |
117 |
|
118 |
case 'c': /* config file */ |
119 |
confbase = strdup (optarg); |
120 |
break; |
121 |
|
122 |
case 'D': /* no detach */ |
123 |
do_detach = 0; |
124 |
break; |
125 |
|
126 |
case 'L': /* lock into memory */ |
127 |
do_mlock = 1; |
128 |
break; |
129 |
|
130 |
case 'l': /* inc debug level */ |
131 |
{ |
132 |
llevel = string_to_loglevel (optarg); |
133 |
|
134 |
if (llevel == L_NONE) |
135 |
slog (L_WARN, "'%s': %s", optarg, UNKNOWN_LOGLEVEL); |
136 |
} |
137 |
break; |
138 |
|
139 |
case '?': |
140 |
usage (1); |
141 |
|
142 |
default: |
143 |
break; |
144 |
} |
145 |
} |
146 |
} |
147 |
|
148 |
/* |
149 |
Close network connections, and terminate neatly |
150 |
*/ |
151 |
void cleanup_and_exit(int c) |
152 |
{ |
153 |
network.shutdown_all (); |
154 |
|
155 |
if (conf.pidfilename) |
156 |
remove_pid (conf.pidfilename); |
157 |
|
158 |
slog (L_INFO, _("terminating with exit code %d"), c); |
159 |
|
160 |
exit (c); |
161 |
} |
162 |
|
163 |
/* |
164 |
Signal handlers. |
165 |
*/ |
166 |
RETSIGTYPE |
167 |
sigterm_handler (int a) |
168 |
{ |
169 |
network.events |= vpn::EVENT_SHUTDOWN; |
170 |
network.event.start (0); |
171 |
} |
172 |
|
173 |
RETSIGTYPE |
174 |
sighup_handler (int a) |
175 |
{ |
176 |
network.events |= vpn::EVENT_RECONNECT; |
177 |
network.event.start (0); |
178 |
} |
179 |
|
180 |
RETSIGTYPE |
181 |
sigusr1_handler (int a) |
182 |
{ |
183 |
network.dump_status (); |
184 |
} |
185 |
|
186 |
RETSIGTYPE |
187 |
sigusr2_handler (int a) |
188 |
{ |
189 |
} |
190 |
|
191 |
void |
192 |
setup_signals (void) |
193 |
{ |
194 |
struct sigaction act; |
195 |
|
196 |
sigfillset (&act.sa_mask); |
197 |
act.sa_flags = 0; |
198 |
|
199 |
act.sa_handler = sighup_handler; sigaction (SIGHUP , &act, NULL); |
200 |
act.sa_handler = sigusr1_handler; sigaction (SIGUSR1, &act, NULL); |
201 |
act.sa_handler = sigusr2_handler; sigaction (SIGUSR2, &act, NULL); |
202 |
act.sa_handler = SIG_IGN; sigaction (SIGCHLD, &act, NULL); |
203 |
act.sa_handler = SIG_IGN; sigaction (SIGPIPE, &act, NULL); |
204 |
act.sa_flags = SA_RESETHAND; |
205 |
act.sa_handler = sigterm_handler; sigaction (SIGINT , &act, NULL); |
206 |
act.sa_handler = sigterm_handler; sigaction (SIGTERM, &act, NULL); |
207 |
} |
208 |
|
209 |
int |
210 |
main (int argc, char **argv, char **envp) |
211 |
{ |
212 |
ERR_load_crypto_strings (); // we have the RAM |
213 |
|
214 |
set_loglevel (L_INFO); |
215 |
set_identity (argv[0]); |
216 |
log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
217 |
|
218 |
setlocale (LC_ALL, ""); |
219 |
bindtextdomain (PACKAGE, LOCALEDIR); |
220 |
textdomain (PACKAGE); |
221 |
|
222 |
parse_options (argc, argv, envp); |
223 |
|
224 |
if (show_version) |
225 |
{ |
226 |
printf (_("%s version %s (built %s %s, protocol %d.%d)\n"), get_identity (), |
227 |
VERSION, __DATE__, __TIME__, PROTOCOL_MAJOR, PROTOCOL_MINOR); |
228 |
printf (_("Built with kernel interface %s/%s.\n"), IFTYPE, IFSUBTYPE); |
229 |
printf (_ |
230 |
("Copyright (C) 2003 Marc Lehmann <vpe@plan9.de> and others.\n" |
231 |
"See the AUTHORS file for a complete list.\n\n" |
232 |
"tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n" |
233 |
"and you are welcome to redistribute it under certain conditions;\n" |
234 |
"see the file COPYING for details.\n")); |
235 |
|
236 |
return 0; |
237 |
} |
238 |
|
239 |
if (show_help) |
240 |
usage (0); |
241 |
|
242 |
log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
243 |
|
244 |
/* Lock all pages into memory if requested */ |
245 |
|
246 |
#if HAVE_MLOCKALL && HAVE_SYS_MMAN_H && _POSIX_MEMLOCK |
247 |
if (do_mlock) |
248 |
if (mlockall (MCL_CURRENT | MCL_FUTURE)) |
249 |
slog (L_ERR, _("system call `%s' failed: %s"), "mlockall", strerror (errno)); |
250 |
#endif |
251 |
|
252 |
conf.read_config (true); |
253 |
|
254 |
set_loglevel (llevel != L_NONE ? llevel : conf.llevel); |
255 |
|
256 |
RAND_load_file ("/dev/urandom", 1024); |
257 |
|
258 |
if (!THISNODE) |
259 |
{ |
260 |
slog (L_ERR, _("current node not set, or node '%s' not found in configfile, specify the nodename when starting vped."), |
261 |
thisnode ? thisnode : "<unset>"); |
262 |
exit (EXIT_FAILURE); |
263 |
} |
264 |
|
265 |
if (detach (do_detach)) |
266 |
exit (EXIT_SUCCESS); |
267 |
|
268 |
setup_signals (); |
269 |
|
270 |
if (!network.setup ()) |
271 |
{ |
272 |
io_manager::loop (); |
273 |
cleanup_and_exit (EXIT_FAILURE); |
274 |
} |
275 |
|
276 |
slog (L_ERR, _("unable to setup network, unrecoverable error, exiting.")); |
277 |
cleanup_and_exit (EXIT_FAILURE); |
278 |
} |
279 |
|