diff --git a/isisd/isisd.h b/isisd/isisd.h
new file mode 100644
index 0000000..67bf8d6
--- /dev/null
+++ b/isisd/isisd.h
@@ -0,0 +1,147 @@
+/*
+ * IS-IS Rout(e)ing protocol - isisd.h   
+ *
+ * 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.
+ */
+
+#ifndef ISISD_H
+#define ISISD_H
+
+#define ISISD_VERSION "0.0.7"
+#define ISIS_VTYSH_PATH        "/tmp/.isisd"
+
+/* uncomment if you are a developer in bug hunt */
+/* #define EXTREME_DEBUG  */
+/* #define EXTREME_TLV_DEBUG */
+
+/* If you want topology stuff compiled in */
+/* #define TOPOLOGY_GENERATE */
+
+struct rmap{
+  char *name;
+  struct route_map *map;
+};
+
+struct isis
+{
+  u_long process_id;
+  int sysid_set;
+  u_char sysid[ISIS_SYS_ID_LEN];    /* SystemID for this IS */
+  struct list *area_list;           /* list of IS-IS areas */
+  struct list *init_circ_list;
+  struct list *nexthops;            /* IPv4 next hops from this IS */
+#ifdef HAVE_IPV6
+  struct list  *nexthops6;          /* IPv6 next hops from this IS */
+#endif /* HAVE_IPV6 */
+  u_char max_area_addrs;            /* maximumAreaAdresses */
+  struct area_addr *man_area_addrs; /* manualAreaAddresses */
+  u_int32_t debugs;                 /* bitmap for debug */
+  time_t uptime;                    /* when did we start */
+  
+  /* Redistributed external information. */
+  struct route_table *external_info[ZEBRA_ROUTE_MAX + 1];
+  /* Redistribute metric info. */
+  struct {
+    int type;                   /* Internal or External  */
+    int value;                  /* metric value */
+  } dmetric [ZEBRA_ROUTE_MAX + 1];
+
+  struct {
+    char *name;
+    struct route_map *map;
+  } rmap [ZEBRA_ROUTE_MAX + 1];
+#ifdef HAVE_IPV6
+  struct {
+    struct {
+      char *name;
+      struct route_map *map;
+    } rmap [ZEBRA_ROUTE_MAX + 1];
+  } inet6_afmode;
+#endif
+};
+
+struct isis_area 
+{
+  struct isis *isis;                          /* back pointer */
+  dict_t *lspdb[ISIS_LEVELS];                 /* link-state dbs */
+  struct isis_spftree *spftree[ISIS_LEVELS];  /* The v4 SPTs */
+  struct route_table *route_table;            /* IPv4 routes */
+#ifdef HAVE_IPV6
+  struct isis_spftree *spftree6[ISIS_LEVELS]; /* The v4 SPTs */
+  struct route_table *route_table6;           /* IPv6 routes */
+#endif
+  int min_bcast_mtu;
+  struct list *circuit_list;                  /* IS-IS circuits */
+  struct flags flags;                        
+  struct thread *t_tick;                      /* LSP walker */
+  struct thread *t_remove_aged;              
+  int lsp_regenerate_pending[ISIS_LEVELS];
+  struct thread *t_lsp_refresh[ISIS_LEVELS];
+  
+  /*
+   * Configurables 
+   */
+  struct isis_passwd area_passwd;
+  struct isis_passwd domain_passwd;
+  /* do we support dynamic hostnames?  */
+  char dynhostname;
+  /* do we support new style metrics?  */
+  char newmetric;  
+  /* identifies the routing instance   */
+  char *area_tag;  
+  /* area addresses for this area      */
+  struct list *area_addrs;  
+  u_int16_t max_lsp_lifetime[ISIS_LEVELS];         
+  char is_type;  /* level-1 level-1-2 or level-2-only */
+  u_int16_t lsp_refresh[ISIS_LEVELS];
+  /* minimum time allowed before lsp retransmission */
+  u_int16_t lsp_gen_interval[ISIS_LEVELS];
+  /* min interval between between consequtive SPFs */
+  u_int16_t min_spf_interval[ISIS_LEVELS]; 
+  /* the percentage of LSP mtu size used, before generating a new frag */
+  int lsp_frag_threshold; 
+  int ip_circuits;
+#ifdef HAVE_IPV6
+  int ipv6_circuits;
+#endif /* HAVE_IPV6 */
+  /* Counters */
+  u_int32_t circuit_state_changes;
+#ifdef TOPOLOGY_GENERATE
+  struct list                   *topology;
+  char   topology_baseis[ISIS_SYS_ID_LEN]; /* is for the first is emulated  */
+  char                    top_params[200]; /* FIXME: what is reasonable?    */
+#endif /* TOPOLOGY_GENERATE */
+};
+
+void isis_init(void);
+struct isis_area *isis_area_lookup (char *);
+
+#define DEBUG_ADJ_PACKETS                (1<<0)
+#define DEBUG_CHECKSUM_ERRORS            (1<<1)
+#define DEBUG_LOCAL_UPDATES              (1<<2)
+#define DEBUG_PROTOCOL_ERRORS            (1<<3)
+#define DEBUG_SNP_PACKETS                (1<<4)
+#define DEBUG_UPDATE_PACKETS             (1<<5)
+#define DEBUG_SPF_EVENTS                 (1<<6)
+#define DEBUG_SPF_STATS                  (1<<7)
+#define DEBUG_SPF_TRIGGERS               (1<<8)
+#define DEBUG_RTE_EVENTS                 (1<<9)
+#define DEBUG_EVENTS                     (1<<10)
+
+#endif /* ISISD_H */