diff --git a/ospf6d/ospf6_main.c b/ospf6d/ospf6_main.c
new file mode 100644
index 0000000..5ab517f
--- /dev/null
+++ b/ospf6d/ospf6_main.c
@@ -0,0 +1,326 @@
+/*
+ * Copyright (C) 1999 Yasuhiro Ohara
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra 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 GNU Zebra; see the file COPYING.  If not, write to the 
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 
+ * Boston, MA 02111-1307, USA.  
+ */
+
+#include <zebra.h>
+#include "getopt.h"
+#include "thread.h"
+#include "log.h"
+#include "version.h"
+#include "command.h"
+#include "vty.h"
+#include "memory.h"
+
+#include "ospf6d.h"
+#include "ospf6_network.h"
+
+void ospf6_init ();
+void ospf6_terminate ();
+void nexthop_init ();
+int ospf6_receive (struct thread *);
+
+extern int ospf6_sock;
+
+/* Default configuration file name for ospf6d. */
+#define OSPF6_DEFAULT_CONFIG       "ospf6d.conf"
+/* Default port values. */
+#define OSPF6_VTY_PORT             2606
+
+/* ospf6d options, we use GNU getopt library. */
+struct option longopts[] = 
+{
+  { "daemon",      no_argument,       NULL, 'd'},
+  { "config_file", required_argument, NULL, 'f'},
+  { "pid_file",    required_argument, NULL, 'i'},
+  { "vty_addr",    required_argument, NULL, 'A'},
+  { "vty_port",    required_argument, NULL, 'P'},
+  { "version",     no_argument,       NULL, 'v'},
+  { "help",        no_argument,       NULL, 'h'},
+  { 0 }
+};
+
+/* Configuration file and directory. */
+char config_current[] = OSPF6_DEFAULT_CONFIG;
+char config_default[] = SYSCONFDIR OSPF6_DEFAULT_CONFIG;
+
+/* ospf6d program name. */
+
+/* is daemon? */
+int daemon_mode = 0;
+
+/* Master of threads. */
+struct thread_master *master;
+
+/* Process ID saved for use by init system */
+char *pid_file = PATH_OSPF6D_PID;
+
+/* for reload */
+char _cwd[64];
+char _progpath[64];
+int _argc;
+char **_argv;
+char **_envp;
+
+/* Help information display. */
+static void
+usage (char *progname, 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 OSPF version 3.\n\n\
+-d, --daemon       Runs in daemon mode\n\
+-f, --config_file  Set configuration file name\n\
+-i, --pid_file     Set process identifier file name\n\
+-A, --vty_addr     Set vty's bind address\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 yasu@sfc.wide.ad.jp\n", progname);
+    }
+
+  exit (status);
+}
+
+
+void
+_reload ()
+{
+  zlog_notice ("OSPF6d (Zebra-%s ospf6d-%s) reloaded",
+               ZEBRA_VERSION, OSPF6_DAEMON_VERSION);
+  ospf6_zebra_finish ();
+  vty_finish ();
+  execve (_progpath, _argv, _envp);
+}
+
+void
+terminate (int i)
+{
+  ospf6_delete (ospf6);
+  unlink (PATH_OSPF6D_PID);
+  zlog_notice ("OSPF6d (Zebra-%s ospf6d-%s) terminated",
+               ZEBRA_VERSION, OSPF6_DAEMON_VERSION);
+  exit (i);
+}
+
+/* SIGHUP handler. */
+void 
+sighup (int sig)
+{
+  zlog_info ("SIGHUP received");
+  _reload ();
+}
+
+/* SIGINT handler. */
+void
+sigint (int sig)
+{
+  zlog_info ("SIGINT received");
+  terminate (0);
+}
+
+/* SIGTERM handler. */
+void
+sigterm (int sig)
+{
+  zlog_info ("SIGTERM received");
+  terminate (0);
+}
+
+/* SIGUSR1 handler. */
+void
+sigusr1 (int sig)
+{
+  zlog_info ("SIGUSR1 received");
+  zlog_rotate (NULL);
+}
+
+/* Signale 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);
+}
+
+/* Initialization of signal handles. */
+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 ospf6d. Treatment of argument and start ospf finite
+   state machine is handled here. */
+int
+main (int argc, char *argv[], char *envp[])
+{
+  char *p;
+  int opt;
+  char *vty_addr = NULL;
+  int vty_port = 0;
+  char *config_file = NULL;
+  char *progname;
+  struct thread thread;
+  int flag;
+
+  /* Set umask before anything for security */
+  umask (0027);
+
+  /* Preserve name of myself. */
+  progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
+
+  /* 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:hp:A: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 'i':
+          pid_file = optarg;
+          break;
+        case 'P':
+          vty_port = atoi (optarg);
+          break;
+        case 'v':
+          print_version (progname);
+          exit (0);
+          break;
+        case 'h':
+          usage (progname, 0);
+          break;
+        default:
+          usage (progname, 1);
+          break;
+        }
+    }
+
+  /* thread master */
+  master = thread_master_create ();
+
+  /* Initializations. */
+  if (! daemon_mode)
+    flag = ZLOG_STDOUT;
+  else
+    flag = 0;
+
+  zlog_default = openzlog (progname, flag, ZLOG_OSPF6,
+			   LOG_CONS|LOG_NDELAY|LOG_PERROR|LOG_PID,
+			   LOG_DAEMON);
+  signal_init ();
+  cmd_init (1);
+  vty_init ();
+  ospf6_init ();
+  memory_init ();
+  sort_node ();
+
+  /* parse config file */
+  vty_read_config (config_file, config_current, config_default);
+
+  if (daemon_mode)
+    daemon (0, 0);
+
+  /* pid file create */
+#if 0
+  pid_output_lock (pid_file);
+#else
+  pid_output (pid_file);
+#endif
+
+  /* Make ospf protocol socket. */
+  ospf6_serv_sock ();
+  thread_add_read (master, ospf6_receive, NULL, ospf6_sock);
+
+  /* Make ospf vty socket. */
+  vty_serv_sock (vty_addr,
+		 vty_port ? vty_port : OSPF6_VTY_PORT, OSPF6_VTYSH_PATH);
+
+  /* Print start message */
+  zlog_notice ("OSPF6d (Zebra-%s ospf6d-%s) starts",
+               ZEBRA_VERSION, OSPF6_DAEMON_VERSION);
+
+  /* Start finite state machine, here we go! */
+  while (thread_fetch (master, &thread))
+    thread_call (&thread);
+
+  /* Log in case thread failed */
+  zlog_warn ("Thread failed");
+  terminate (0);
+
+  /* Not reached. */
+  exit (0);
+}
+