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