diff --git a/isisd/isis_main.c b/isisd/isis_main.c
new file mode 100644
index 0000000..baf5f38
--- /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);
+}
+
+
+
+
+
+
+
+
+
+