diff --git a/ripd/ripd.h b/ripd/ripd.h
new file mode 100644
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--- /dev/null
+++ b/ripd/ripd.h
@@ -0,0 +1,408 @@
+/* RIP related values and structures.
+ * Copyright (C) 1997, 1998, 1999 Kunihiro Ishiguro <kunihiro@zebra.org>
+ *
+ * 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.  
+ */
+
+#ifndef _ZEBRA_RIP_H
+#define _ZEBRA_RIP_H
+
+/* RIP version number. */
+#define RIPv1                            1
+#define RIPv2                            2
+
+/* RIP command list. */
+#define RIP_REQUEST                      1
+#define RIP_RESPONSE                     2
+#define RIP_TRACEON                      3	/* Obsolete */
+#define RIP_TRACEOFF                     4	/* Obsolete */
+#define RIP_POLL                         5
+#define RIP_POLL_ENTRY                   6
+#define RIP_COMMAND_MAX                  7
+
+/* RIP metric infinity value.*/
+#define RIP_METRIC_INFINITY             16
+
+/* Normal RIP packet min and max size. */
+#define RIP_PACKET_MINSIZ                4
+#define RIP_PACKET_MAXSIZ              512
+
+#define RIP_HEADER_SIZE                  4
+#define RIP_RTE_SIZE                    20
+
+/* Max count of routing table entry in one rip packet. */
+#define RIP_MAX_RTE                     25
+
+/* RIP version 2 multicast address. */
+#ifndef INADDR_RIP_GROUP
+#define INADDR_RIP_GROUP        0xe0000009    /* 224.0.0.9 */
+#endif
+
+/* RIP timers */
+#define RIP_UPDATE_TIMER_DEFAULT        30
+#define RIP_TIMEOUT_TIMER_DEFAULT      180
+#define RIP_GARBAGE_TIMER_DEFAULT      120
+
+/* RIP peer timeout value. */
+#define RIP_PEER_TIMER_DEFAULT         180
+
+/* RIP port number. */
+#define RIP_PORT_DEFAULT               520
+#define RIP_VTY_PORT                  2602
+#define RIP_VTYSH_PATH        "/tmp/.ripd"
+
+/* Default configuration file name. */
+#define RIPD_DEFAULT_CONFIG    "ripd.conf"
+
+/* RIP route types. */
+#define RIP_ROUTE_RTE                    0
+#define RIP_ROUTE_STATIC                 1
+#define RIP_ROUTE_DEFAULT                2
+#define RIP_ROUTE_REDISTRIBUTE           3
+#define RIP_ROUTE_INTERFACE              4
+
+/* RIP MD5 authentication. */
+#define RIP_AUTH_MD5_SIZE               16
+
+/* RIP structure. */
+struct rip 
+{
+  /* RIP socket. */
+  int sock;
+
+  /* Default version of rip instance. */
+  u_char version;
+
+  /* Output buffer of RIP. */
+  struct stream *obuf;
+
+  /* RIP routing information base. */
+  struct route_table *table;
+
+  /* RIP only static routing information. */
+  struct route_table *route;
+  
+  /* RIP neighbor. */
+  struct route_table *neighbor;
+  
+  /* RIP threads. */
+  struct thread *t_read;
+
+  /* Update and garbage timer. */
+  struct thread *t_update;
+
+  /* Triggered update hack. */
+  int trigger;
+  struct thread *t_triggered_update;
+  struct thread *t_triggered_interval;
+
+  /* RIP timer values. */
+  unsigned long update_time;
+  unsigned long timeout_time;
+  unsigned long garbage_time;
+
+  /* RIP default metric. */
+  int default_metric;
+
+  /* RIP default-information originate. */
+  u_char default_information;
+  char *default_information_route_map;
+
+  /* RIP default distance. */
+  u_char distance;
+  struct route_table *distance_table;
+
+  /* For redistribute route map. */
+  struct
+  {
+    char *name;
+    struct route_map *map;
+    int metric_config;
+    u_int32_t metric;
+  } route_map[ZEBRA_ROUTE_MAX];
+};
+
+/* RIP routing table entry which belong to rip_packet. */
+struct rte
+{
+  u_int16_t family;		/* Address family of this route. */
+  u_int16_t tag;		/* Route Tag which included in RIP2 packet. */
+  struct in_addr prefix;	/* Prefix of rip route. */
+  struct in_addr mask;		/* Netmask of rip route. */
+  struct in_addr nexthop;	/* Next hop of rip route. */
+  u_int32_t metric;		/* Metric value of rip route. */
+};
+
+/* RIP packet structure. */
+struct rip_packet
+{
+  unsigned char command;	/* Command type of RIP packet. */
+  unsigned char version;	/* RIP version which coming from peer. */
+  unsigned char pad1;		/* Padding of RIP packet header. */
+  unsigned char pad2;		/* Same as above. */
+  struct rte rte[1];		/* Address structure. */
+};
+
+/* Buffer to read RIP packet. */
+union rip_buf
+{
+  struct rip_packet rip_packet;
+  char buf[RIP_PACKET_MAXSIZ];
+};
+
+/* RIP route information. */
+struct rip_info
+{
+  /* This route's type. */
+  int type;
+
+  /* Sub type. */
+  int sub_type;
+
+  /* RIP nexthop. */
+  struct in_addr nexthop;
+  struct in_addr from;
+
+  /* Which interface does this route come from. */
+  unsigned int ifindex;
+
+  /* Metric of this route. */
+  u_int32_t metric;
+
+  /* Tag information of this route. */
+  u_int16_t tag;
+
+  /* Flags of RIP route. */
+#define RIP_RTF_FIB      1
+#define RIP_RTF_CHANGED  2
+  u_char flags;
+
+  /* Garbage collect timer. */
+  struct thread *t_timeout;
+  struct thread *t_garbage_collect;
+
+  /* Route-map futures - this variables can be changed. */
+  struct in_addr nexthop_out;
+  u_char metric_set;
+  u_int32_t metric_out;
+  unsigned int ifindex_out;
+
+  struct route_node *rp;
+
+  u_char distance;
+
+#ifdef NEW_RIP_TABLE
+  struct rip_info *next;
+  struct rip_info *prev;
+#endif /* NEW_RIP_TABLE */
+};
+
+/* RIP specific interface configuration. */
+struct rip_interface
+{
+  /* RIP is enabled on this interface. */
+  int enable_network;
+  int enable_interface;
+
+  /* RIP is running on this interface. */
+  int running;
+
+  /* RIP version control. */
+  int ri_send;
+  int ri_receive;
+
+  /* RIPv2 authentication type. */
+#define RIP_NO_AUTH                0
+#define RIP_AUTH_DATA              1
+#define RIP_AUTH_SIMPLE_PASSWORD   2
+#define RIP_AUTH_MD5               3
+  int auth_type;
+
+  /* RIPv2 authentication string. */
+  char *auth_str;
+
+  /* RIPv2 authentication key chain. */
+  char *key_chain;
+
+  /* Split horizon flag. */
+  int split_horizon;
+  int split_horizon_default;
+
+  /* For filter type slot. */
+#define RIP_FILTER_IN  0
+#define RIP_FILTER_OUT 1
+#define RIP_FILTER_MAX 2
+
+  /* Access-list. */
+  struct access_list *list[RIP_FILTER_MAX];
+
+  /* Prefix-list. */
+  struct prefix_list *prefix[RIP_FILTER_MAX];
+
+  /* Wake up thread. */
+  struct thread *t_wakeup;
+
+  /* Interface statistics. */
+  int recv_badpackets;
+  int recv_badroutes;
+  int sent_updates;
+
+  /* Passive interface. */
+  int passive;
+};
+
+/* RIP peer information. */
+struct rip_peer
+{
+  /* Peer address. */
+  struct in_addr addr;
+
+  /* Peer RIP tag value. */
+  int domain;
+
+  /* Last update time. */
+  time_t uptime;
+
+  /* Peer RIP version. */
+  u_char version;
+
+  /* Statistics. */
+  int recv_badpackets;
+  int recv_badroutes;
+
+  /* Timeout thread. */
+  struct thread *t_timeout;
+};
+
+struct rip_md5_info
+{
+  u_int16_t family;
+  u_int16_t type;
+  u_int16_t packet_len;
+  u_char keyid;
+  u_char auth_len;
+  u_int32_t sequence;
+  u_int32_t reserv1;
+  u_int32_t reserv2;
+};
+
+struct rip_md5_data
+{
+  u_int16_t family;
+  u_int16_t type;
+  u_char digest[16];
+};
+
+/* RIP accepet/announce methods. */
+#define RI_RIP_UNSPEC                      0
+#define RI_RIP_VERSION_1                   1
+#define RI_RIP_VERSION_2                   2
+#define RI_RIP_VERSION_1_AND_2             3
+
+/* Default value for "default-metric" command. */
+#define RIP_DEFAULT_METRIC_DEFAULT         1
+
+/* RIP event. */
+enum rip_event 
+{
+  RIP_READ,
+  RIP_UPDATE_EVENT,
+  RIP_TRIGGERED_UPDATE,
+};
+
+/* Macro for timer turn on. */
+#define RIP_TIMER_ON(T,F,V) \
+  do { \
+    if (!(T)) \
+      (T) = thread_add_timer (master, (F), rinfo, (V)); \
+  } while (0)
+
+/* Macro for timer turn off. */
+#define RIP_TIMER_OFF(X) \
+  do { \
+    if (X) \
+      { \
+        thread_cancel (X); \
+        (X) = NULL; \
+      } \
+  } while (0)
+
+/* Prototypes. */
+void rip_init ();
+void rip_reset ();
+void rip_clean ();
+void rip_clean_network ();
+void rip_interface_clean ();
+void rip_interface_reset ();
+void rip_passive_interface_clean ();
+void rip_if_init ();
+void rip_if_down_all ();
+void rip_route_map_init ();
+void rip_route_map_reset ();
+void rip_snmp_init ();
+void rip_zclient_init ();
+void rip_zclient_start ();
+void rip_zclient_reset ();
+void rip_offset_init ();
+int if_check_address (struct in_addr addr);
+int if_valid_neighbor (struct in_addr addr);
+
+int rip_request_send (struct sockaddr_in *, struct interface *, u_char);
+int rip_neighbor_lookup (struct sockaddr_in *);
+void rip_redistribute_add (int, int, struct prefix_ipv4 *, unsigned int, 
+			   struct in_addr *);
+void rip_redistribute_delete (int, int, struct prefix_ipv4 *, unsigned int);
+void rip_redistribute_withdraw (int);
+void rip_zebra_ipv4_add (struct prefix_ipv4 *, struct in_addr *, u_int32_t, u_char);
+void rip_zebra_ipv4_delete (struct prefix_ipv4 *, struct in_addr *, u_int32_t);
+void rip_interface_multicast_set (int, struct interface *);
+void rip_distribute_update_interface (struct interface *);
+
+int config_write_rip_network (struct vty *, int);
+int config_write_rip_offset_list (struct vty *);
+int config_write_rip_redistribute (struct vty *, int);
+
+void rip_peer_init ();
+void rip_peer_update (struct sockaddr_in *, u_char);
+void rip_peer_bad_route (struct sockaddr_in *);
+void rip_peer_bad_packet (struct sockaddr_in *);
+void rip_peer_display (struct vty *);
+struct rip_peer *rip_peer_lookup (struct in_addr *);
+struct rip_peer *rip_peer_lookup_next (struct in_addr *);
+
+int rip_offset_list_apply_in (struct prefix_ipv4 *, struct interface *, u_int32_t *);
+int rip_offset_list_apply_out (struct prefix_ipv4 *, struct interface *, u_int32_t *);
+void rip_offset_clean ();
+
+void rip_info_free (struct rip_info *);
+u_char rip_distance_apply (struct rip_info *);
+void rip_redistribute_clean ();
+void rip_ifaddr_add (struct interface *, struct connected *);
+void rip_ifaddr_delete (struct interface *, struct connected *);
+
+/* There is only one rip strucutre. */
+extern struct rip *rip;
+
+/* Master thread strucutre. */
+extern struct thread_master *master;
+
+/* RIP statistics for SNMP. */
+extern long rip_global_route_changes;
+extern long rip_global_queries;
+
+#endif /* _ZEBRA_RIP_H */