Annotation of embedaddon/quagga/isisd/isis_main.c, revision 1.1
1.1 ! misho 1: /*
! 2: * IS-IS Rout(e)ing protocol - isis_main.c
! 3: *
! 4: * Copyright (C) 2001,2002 Sampo Saaristo
! 5: * Tampere University of Technology
! 6: * Institute of Communications Engineering
! 7: *
! 8: * This program is free software; you can redistribute it and/or modify it
! 9: * under the terms of the GNU General Public Licenseas published by the Free
! 10: * Software Foundation; either version 2 of the License, or (at your option)
! 11: * any later version.
! 12: *
! 13: * This program is distributed in the hope that it will be useful,but WITHOUT
! 14: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
! 15: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
! 16: * more details.
! 17:
! 18: * You should have received a copy of the GNU General Public License along
! 19: * with this program; if not, write to the Free Software Foundation, Inc.,
! 20: * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
! 21: */
! 22:
! 23: #include <zebra.h>
! 24:
! 25: #include "getopt.h"
! 26: #include "thread.h"
! 27: #include "log.h"
! 28: #include <lib/version.h>
! 29: #include "command.h"
! 30: #include "vty.h"
! 31: #include "memory.h"
! 32: #include "stream.h"
! 33: #include "if.h"
! 34: #include "privs.h"
! 35: #include "sigevent.h"
! 36: #include "filter.h"
! 37:
! 38: #include "isisd/dict.h"
! 39: #include "include-netbsd/iso.h"
! 40: #include "isisd/isis_constants.h"
! 41: #include "isisd/isis_common.h"
! 42: #include "isisd/isis_flags.h"
! 43: #include "isisd/isis_circuit.h"
! 44: #include "isisd/isisd.h"
! 45: #include "isisd/isis_dynhn.h"
! 46:
! 47: /* Default configuration file name */
! 48: #define ISISD_DEFAULT_CONFIG "isisd.conf"
! 49: /* Default vty port */
! 50: #define ISISD_VTY_PORT 2608
! 51:
! 52: /* isisd privileges */
! 53: zebra_capabilities_t _caps_p[] = {
! 54: ZCAP_NET_RAW,
! 55: ZCAP_BIND
! 56: };
! 57:
! 58: struct zebra_privs_t isisd_privs = {
! 59: #if defined(QUAGGA_USER)
! 60: .user = QUAGGA_USER,
! 61: #endif
! 62: #if defined QUAGGA_GROUP
! 63: .group = QUAGGA_GROUP,
! 64: #endif
! 65: #ifdef VTY_GROUP
! 66: .vty_group = VTY_GROUP,
! 67: #endif
! 68: .caps_p = _caps_p,
! 69: .cap_num_p = 2,
! 70: .cap_num_i = 0
! 71: };
! 72:
! 73: /* isisd options */
! 74: struct option longopts[] = {
! 75: {"daemon", no_argument, NULL, 'd'},
! 76: {"config_file", required_argument, NULL, 'f'},
! 77: {"pid_file", required_argument, NULL, 'i'},
! 78: {"vty_addr", required_argument, NULL, 'A'},
! 79: {"vty_port", required_argument, NULL, 'P'},
! 80: {"user", required_argument, NULL, 'u'},
! 81: {"group", required_argument, NULL, 'g'},
! 82: {"version", no_argument, NULL, 'v'},
! 83: {"dryrun", no_argument, NULL, 'C'},
! 84: {"help", no_argument, NULL, 'h'},
! 85: {0}
! 86: };
! 87:
! 88: /* Configuration file and directory. */
! 89: char config_default[] = SYSCONFDIR ISISD_DEFAULT_CONFIG;
! 90: char *config_file = NULL;
! 91:
! 92: /* isisd program name. */
! 93: char *progname;
! 94:
! 95: int daemon_mode = 0;
! 96:
! 97: /* Master of threads. */
! 98: struct thread_master *master;
! 99:
! 100: /* Process ID saved for use by init system */
! 101: const char *pid_file = PATH_ISISD_PID;
! 102:
! 103: /* for reload */
! 104: char _cwd[MAXPATHLEN];
! 105: char _progpath[MAXPATHLEN];
! 106: int _argc;
! 107: char **_argv;
! 108: char **_envp;
! 109:
! 110: /*
! 111: * Prototypes.
! 112: */
! 113: void reload(void);
! 114: void sighup(void);
! 115: void sigint(void);
! 116: void sigterm(void);
! 117: void sigusr1(void);
! 118:
! 119:
! 120: /* Help information display. */
! 121: static void
! 122: usage (int status)
! 123: {
! 124: if (status != 0)
! 125: fprintf (stderr, "Try `%s --help' for more information.\n", progname);
! 126: else
! 127: {
! 128: printf ("Usage : %s [OPTION...]\n\n\
! 129: Daemon which manages IS-IS routing\n\n\
! 130: -d, --daemon Runs in daemon mode\n\
! 131: -f, --config_file Set configuration file name\n\
! 132: -i, --pid_file Set process identifier file name\n\
! 133: -A, --vty_addr Set vty's bind address\n\
! 134: -P, --vty_port Set vty's port number\n\
! 135: -u, --user User to run as\n\
! 136: -g, --group Group to run as\n\
! 137: -v, --version Print program version\n\
! 138: -C, --dryrun Check configuration for validity and exit\n\
! 139: -h, --help Display this help and exit\n\
! 140: \n\
! 141: Report bugs to http://bugzilla.quagga.net\n", progname);
! 142: }
! 143:
! 144: exit (status);
! 145: }
! 146:
! 147:
! 148: void
! 149: reload ()
! 150: {
! 151: zlog_debug ("Reload");
! 152: /* FIXME: Clean up func call here */
! 153: vty_reset ();
! 154: execve (_progpath, _argv, _envp);
! 155: }
! 156:
! 157: static void
! 158: terminate (int i)
! 159: {
! 160: exit (i);
! 161: }
! 162:
! 163: /*
! 164: * Signal handlers
! 165: */
! 166:
! 167: void
! 168: sighup (void)
! 169: {
! 170: zlog_debug ("SIGHUP received");
! 171: reload ();
! 172:
! 173: return;
! 174: }
! 175:
! 176: void
! 177: sigint (void)
! 178: {
! 179: zlog_notice ("Terminating on signal SIGINT");
! 180: terminate (0);
! 181: }
! 182:
! 183: void
! 184: sigterm (void)
! 185: {
! 186: zlog_notice ("Terminating on signal SIGTERM");
! 187: terminate (0);
! 188: }
! 189:
! 190: void
! 191: sigusr1 (void)
! 192: {
! 193: zlog_debug ("SIGUSR1 received");
! 194: zlog_rotate (NULL);
! 195: }
! 196:
! 197: struct quagga_signal_t isisd_signals[] =
! 198: {
! 199: {
! 200: .signal = SIGHUP,
! 201: .handler = &sighup,
! 202: },
! 203: {
! 204: .signal = SIGUSR1,
! 205: .handler = &sigusr1,
! 206: },
! 207: {
! 208: .signal = SIGINT,
! 209: .handler = &sigint,
! 210: },
! 211: {
! 212: .signal = SIGTERM,
! 213: .handler = &sigterm,
! 214: },
! 215: };
! 216:
! 217: /*
! 218: * Main routine of isisd. Parse arguments and handle IS-IS state machine.
! 219: */
! 220: int
! 221: main (int argc, char **argv, char **envp)
! 222: {
! 223: char *p;
! 224: int opt, vty_port = ISISD_VTY_PORT;
! 225: struct thread thread;
! 226: char *config_file = NULL;
! 227: char *vty_addr = NULL;
! 228: int dryrun = 0;
! 229:
! 230: /* Get the programname without the preceding path. */
! 231: progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
! 232:
! 233: zlog_default = openzlog (progname, ZLOG_ISIS,
! 234: LOG_CONS | LOG_NDELAY | LOG_PID, LOG_DAEMON);
! 235:
! 236: /* for reload */
! 237: _argc = argc;
! 238: _argv = argv;
! 239: _envp = envp;
! 240: getcwd (_cwd, sizeof (_cwd));
! 241: if (*argv[0] == '.')
! 242: snprintf (_progpath, sizeof (_progpath), "%s/%s", _cwd, _argv[0]);
! 243: else
! 244: snprintf (_progpath, sizeof (_progpath), "%s", argv[0]);
! 245:
! 246: /* Command line argument treatment. */
! 247: while (1)
! 248: {
! 249: opt = getopt_long (argc, argv, "df:i:hA:p:P:u:g:vC", longopts, 0);
! 250:
! 251: if (opt == EOF)
! 252: break;
! 253:
! 254: switch (opt)
! 255: {
! 256: case 0:
! 257: break;
! 258: case 'd':
! 259: daemon_mode = 1;
! 260: break;
! 261: case 'f':
! 262: config_file = optarg;
! 263: break;
! 264: case 'i':
! 265: pid_file = optarg;
! 266: break;
! 267: case 'A':
! 268: vty_addr = optarg;
! 269: break;
! 270: case 'P':
! 271: /* Deal with atoi() returning 0 on failure, and isisd not
! 272: listening on isisd port... */
! 273: if (strcmp (optarg, "0") == 0)
! 274: {
! 275: vty_port = 0;
! 276: break;
! 277: }
! 278: vty_port = atoi (optarg);
! 279: vty_port = (vty_port ? vty_port : ISISD_VTY_PORT);
! 280: break;
! 281: case 'u':
! 282: isisd_privs.user = optarg;
! 283: break;
! 284: case 'g':
! 285: isisd_privs.group = optarg;
! 286: break;
! 287: case 'v':
! 288: printf ("ISISd version %s\n", ISISD_VERSION);
! 289: printf ("Copyright (c) 2001-2002 Sampo Saaristo,"
! 290: " Ofer Wald and Hannes Gredler\n");
! 291: print_version ("Zebra");
! 292: exit (0);
! 293: break;
! 294: case 'C':
! 295: dryrun = 1;
! 296: break;
! 297: case 'h':
! 298: usage (0);
! 299: break;
! 300: default:
! 301: usage (1);
! 302: break;
! 303: }
! 304: }
! 305:
! 306: /* thread master */
! 307: master = thread_master_create ();
! 308:
! 309: /* random seed from time */
! 310: srand (time (NULL));
! 311:
! 312: /*
! 313: * initializations
! 314: */
! 315: zprivs_init (&isisd_privs);
! 316: signal_init (master, Q_SIGC (isisd_signals), isisd_signals);
! 317: cmd_init (1);
! 318: vty_init (master);
! 319: memory_init ();
! 320: access_list_init();
! 321: isis_init ();
! 322: dyn_cache_init ();
! 323: sort_node ();
! 324:
! 325: /* parse config file */
! 326: /* this is needed three times! because we have interfaces before the areas */
! 327: vty_read_config (config_file, config_default);
! 328: vty_read_config (config_file, config_default);
! 329: vty_read_config (config_file, config_default);
! 330:
! 331: /* Start execution only if not in dry-run mode */
! 332: if (dryrun)
! 333: return(0);
! 334:
! 335: /* demonize */
! 336: if (daemon_mode && daemon (0, 0) < 0)
! 337: {
! 338: zlog_err("ISISd daemon failed: %s", strerror(errno));
! 339: exit (1);
! 340: }
! 341:
! 342: /* Process ID file creation. */
! 343: pid_output (pid_file);
! 344:
! 345: /* Make isis vty socket. */
! 346: vty_serv_sock (vty_addr, vty_port, ISIS_VTYSH_PATH);
! 347:
! 348: /* Print banner. */
! 349: zlog_notice ("Quagga-ISISd %s starting: vty@%d", QUAGGA_VERSION, vty_port);
! 350:
! 351: /* Start finite state machine. */
! 352: while (thread_fetch (master, &thread))
! 353: thread_call (&thread);
! 354:
! 355: /* Not reached. */
! 356: exit (0);
! 357: }
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