diff options
Diffstat (limited to 'isisd/isis_main.c')
| -rw-r--r-- | isisd/isis_main.c | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/isisd/isis_main.c b/isisd/isis_main.c new file mode 100644 index 00000000..baf5f38d --- /dev/null +++ b/isisd/isis_main.c @@ -0,0 +1,330 @@ +/* + * IS-IS Rout(e)ing protocol - isis_main.c + * + * Copyright (C) 2001,2002 Sampo Saaristo + * Tampere University of Technology + * Institute of Communications Engineering + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public Licenseas published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful,but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include <stdio.h> +#include <zebra.h> +#include <net/ethernet.h> + +#include "getopt.h" +#include "thread.h" +#include "log.h" +#include "version.h" +#include "command.h" +#include "vty.h" +#include "memory.h" +#include "stream.h" +#include "if.h" + +#include "isisd/dict.h" +#include "include-netbsd/iso.h" +#include "isisd/isis_constants.h" +#include "isisd/isis_common.h" +#include "isisd/isis_flags.h" +#include "isisd/isis_circuit.h" +#include "isisd/isisd.h" +#include "isisd/isis_dynhn.h" + +/* Default configuration file name */ +#define ISISD_DEFAULT_CONFIG "isisd.conf" +/* Default vty port */ +#define ISISD_VTY_PORT 2607 + +/* isisd options */ +struct option longopts[] = +{ + { "daemon", no_argument, NULL, 'd'}, + { "config_file", required_argument, NULL, 'f'}, + { "vty_port", required_argument, NULL, 'P'}, + { "version", no_argument, NULL, 'v'}, + { "help", no_argument, NULL, 'h'}, + { 0 } +}; + +/* Configuration file and directory. */ +char config_current[] = ISISD_DEFAULT_CONFIG; +char config_default[] = SYSCONFDIR ISISD_DEFAULT_CONFIG; +char *config_file = NULL; + +/* isisd program name. */ +char *progname; + +int daemon_mode = 0; + +/* Master of threads. */ +struct thread_master *master; + + +/* for reload */ +char _cwd[64]; +char _progpath[64]; +int _argc; +char **_argv; +char **_envp; + + +/* Help information display. */ +static void +usage (int status) +{ + if (status != 0) + fprintf (stderr, "Try `%s --help' for more information.\n", progname); + else + { + printf ("Usage : %s [OPTION...]\n\n\ +Daemon which manages IS-IS routing\n\n\ +-d, --daemon Runs in daemon mode\n\ +-f, --config_file Set configuration file name\n\ +-P, --vty_port Set vty's port number\n\ +-v, --version Print program version\n\ +-h, --help Display this help and exit\n\ +\n\ +Report bugs to sambo@cs.tut.fi\n", progname); + } + + exit (status); +} + + +void +reload () +{ + zlog_info ("Reload"); + /* FIXME: Clean up func call here */ + vty_finish (); + execve (_progpath, _argv, _envp); +} + +void +terminate (int i) +{ + exit (i); +} + +/* + * Signal handlers + */ +void +sighup (int sig) +{ + zlog_info ("SIGHUP received"); + reload (); + + return; +} + +void +sigint (int sig) +{ + zlog_info ("SIGINT received"); + terminate (0); + + return; +} + +void +sigterm (int sig) +{ + zlog_info ("SIGTERM received"); + terminate (0); +} + +void +sigusr1 (int sig) +{ + zlog_info ("SIGUSR1 received"); + zlog_rotate (NULL); +} + +/* + * Signal wrapper. + */ +RETSIGTYPE * +signal_set (int signo, void (*func)(int)) +{ + int ret; + struct sigaction sig; + struct sigaction osig; + + sig.sa_handler = func; + sigemptyset (&sig.sa_mask); + sig.sa_flags = 0; +#ifdef SA_RESTART + sig.sa_flags |= SA_RESTART; +#endif /* SA_RESTART */ + + ret = sigaction (signo, &sig, &osig); + + if (ret < 0) + return (SIG_ERR); + else + return (osig.sa_handler); +} + +void +signal_init () +{ + signal_set (SIGHUP, sighup); + signal_set (SIGINT, sigint); + signal_set (SIGTERM, sigterm); + signal_set (SIGPIPE, SIG_IGN); +#ifdef SIGTSTP + signal_set (SIGTSTP, SIG_IGN); +#endif +#ifdef SIGTTIN + signal_set (SIGTTIN, SIG_IGN); +#endif +#ifdef SIGTTOU + signal_set (SIGTTOU, SIG_IGN); +#endif + signal_set (SIGUSR1, sigusr1); +} + +/* + * Main routine of isisd. Parse arguments and handle IS-IS state machine. + */ +int +main (int argc, char **argv, char **envp) +{ + char *p; + int opt, vty_port = ISISD_VTY_PORT; + struct thread thread; + char *config_file = NULL; + char *vty_addr = NULL; + + /* Get the programname without the preceding path. */ + progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]); + + zlog_default = openzlog (progname, ZLOG_NOLOG, ZLOG_ISIS, + LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON); + + + /* for reload */ + _argc = argc; + _argv = argv; + _envp = envp; + getcwd (_cwd, sizeof (_cwd)); + if (*argv[0] == '.') + snprintf (_progpath, sizeof (_progpath), "%s/%s", _cwd, _argv[0]); + else + snprintf (_progpath, sizeof (_progpath), "%s", argv[0]); + + /* Command line argument treatment. */ + while (1) + { + opt = getopt_long (argc, argv, "df:hAp:P:v", longopts, 0); + + if (opt == EOF) + break; + + switch (opt) + { + case 0: + break; + case 'd': + daemon_mode = 1; + break; + case 'f': + config_file = optarg; + break; + case 'A': + vty_addr = optarg; + break; + case 'P': + vty_port = atoi (optarg); + break; + case 'v': + printf("ISISd version %s\n", ISISD_VERSION); + printf("Copyright (c) 2001-2002 Sampo Saaristo," + " Ofer Wald and Hannes Gredler\n"); + print_version ("Zebra"); + exit (0); + break; + case 'h': + usage (0); + break; + default: + usage (1); + break; + } + } + + /* thread master */ + master = thread_master_create (); + + /* random seed from time */ + srand(time(NULL)); + + /* + * initializations + */ + signal_init (); + cmd_init (1); + vty_init (); + memory_init (); + isis_init (); + dyn_cache_init (); + sort_node (); + + /* parse config file */ + /* this is needed three times! because we have interfaces before the areas */ + vty_read_config (config_file, config_current, config_default); +#if 0 + vty_read_config (config_file, config_current, config_default); + vty_read_config (config_file, config_current, config_default); +#endif + /* demonize */ + if (daemon_mode) + daemon (0, 0); + + /* Problems with the build env ?*/ +#ifndef PATH_ISISD_PID +#define PATH_ISISD_PID "/var/run/isisd.pid" +#endif + /* Process ID file creation. */ + pid_output (PATH_ISISD_PID); + + /* Make isis vty socket. */ + vty_serv_sock (vty_addr, vty_port ? vty_port : ISISD_VTY_PORT, + ISIS_VTYSH_PATH); + + /* Print banner. */ + zlog_info ("ISISd %s starting: vty@%d", ZEBRA_VERSION, vty_port); +#ifdef HAVE_IPV6 + zlog_info ("IPv6 enabled"); +#endif + /* Start finite state machine. */ + while (thread_fetch (master, &thread)) + thread_call (&thread); + + /* Not reached. */ + exit (0); +} + + + + + + + + + + |