diff --git a/ripd/rip_peer.c b/ripd/rip_peer.c
new file mode 100644
index 0000000..20c2da7
--- /dev/null
+++ b/ripd/rip_peer.c
@@ -0,0 +1,211 @@
+/* RIP peer support
+ * Copyright (C) 2000 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.  
+ */
+
+#include <zebra.h>
+
+#include "if.h"
+#include "prefix.h"
+#include "command.h"
+#include "linklist.h"
+#include "thread.h"
+#include "memory.h"
+
+#include "ripd/ripd.h"
+
+/* Linked list of RIP peer. */
+struct list *peer_list;
+
+struct rip_peer *
+rip_peer_new ()
+{
+  struct rip_peer *new;
+
+  new = XMALLOC (MTYPE_RIP_PEER, sizeof (struct rip_peer));
+  memset (new, 0, sizeof (struct rip_peer));
+  return new;
+}
+
+void
+rip_peer_free (struct rip_peer *peer)
+{
+  XFREE (MTYPE_RIP_PEER, peer);
+}
+
+struct rip_peer *
+rip_peer_lookup (struct in_addr *addr)
+{
+  struct rip_peer *peer;
+  struct listnode *nn;
+
+  LIST_LOOP (peer_list, peer, nn)
+    {
+      if (IPV4_ADDR_SAME (&peer->addr, addr))
+	return peer;
+    }
+  return NULL;
+}
+
+struct rip_peer *
+rip_peer_lookup_next (struct in_addr *addr)
+{
+  struct rip_peer *peer;
+  struct listnode *nn;
+
+  LIST_LOOP (peer_list, peer, nn)
+    {
+      if (htonl (peer->addr.s_addr) > htonl (addr->s_addr))
+	return peer;
+    }
+  return NULL;
+}
+
+/* RIP peer is timeout. */
+int
+rip_peer_timeout (struct thread *t)
+{
+  struct rip_peer *peer;
+
+  peer = THREAD_ARG (t);
+  listnode_delete (peer_list, peer);
+  rip_peer_free (peer);
+
+  return 0;
+}
+
+/* Get RIP peer.  At the same time update timeout thread. */
+struct rip_peer *
+rip_peer_get (struct in_addr *addr)
+{
+  struct rip_peer *peer;
+
+  peer = rip_peer_lookup (addr);
+
+  if (peer)
+    {
+      if (peer->t_timeout)
+	thread_cancel (peer->t_timeout);
+    }
+  else
+    {
+      peer = rip_peer_new ();
+      peer->addr = *addr;
+      listnode_add_sort (peer_list, peer);
+    }
+
+  /* Update timeout thread. */
+  peer->t_timeout = thread_add_timer (master, rip_peer_timeout, peer,
+				      RIP_PEER_TIMER_DEFAULT);
+
+  /* Last update time set. */
+  time (&peer->uptime);
+  
+  return peer;
+}
+
+void
+rip_peer_update (struct sockaddr_in *from, u_char version)
+{
+  struct rip_peer *peer;
+  peer = rip_peer_get (&from->sin_addr);
+  peer->version = version;
+}
+
+void
+rip_peer_bad_route (struct sockaddr_in *from)
+{
+  struct rip_peer *peer;
+  peer = rip_peer_get (&from->sin_addr);
+  peer->recv_badroutes++;
+}
+
+void
+rip_peer_bad_packet (struct sockaddr_in *from)
+{
+  struct rip_peer *peer;
+  peer = rip_peer_get (&from->sin_addr);
+  peer->recv_badpackets++;
+}
+
+/* Display peer uptime. */
+char *
+rip_peer_uptime (struct rip_peer *peer, char *buf, size_t len)
+{
+  time_t uptime;
+  struct tm *tm;
+
+  /* If there is no connection has been done before print `never'. */
+  if (peer->uptime == 0)
+    {
+      snprintf (buf, len, "never   ");
+      return buf;
+    }
+
+  /* Get current time. */
+  uptime = time (NULL);
+  uptime -= peer->uptime;
+  tm = gmtime (&uptime);
+
+  /* Making formatted timer strings. */
+#define ONE_DAY_SECOND 60*60*24
+#define ONE_WEEK_SECOND 60*60*24*7
+
+  if (uptime < ONE_DAY_SECOND)
+    snprintf (buf, len, "%02d:%02d:%02d", 
+	      tm->tm_hour, tm->tm_min, tm->tm_sec);
+  else if (uptime < ONE_WEEK_SECOND)
+    snprintf (buf, len, "%dd%02dh%02dm", 
+	      tm->tm_yday, tm->tm_hour, tm->tm_min);
+  else
+    snprintf (buf, len, "%02dw%dd%02dh", 
+	      tm->tm_yday/7, tm->tm_yday - ((tm->tm_yday/7) * 7), tm->tm_hour);
+  return buf;
+}
+
+void
+rip_peer_display (struct vty *vty)
+{
+  struct rip_peer *peer;
+  struct listnode *nn;
+#define RIP_UPTIME_LEN 25
+  char timebuf[RIP_UPTIME_LEN];
+
+  LIST_LOOP (peer_list, peer, nn)
+    {
+      vty_out (vty, "    %-16s %9d %9d %9d   %s%s", inet_ntoa (peer->addr),
+	       peer->recv_badpackets, peer->recv_badroutes,
+	       ZEBRA_RIP_DISTANCE_DEFAULT,
+	       rip_peer_uptime (peer, timebuf, RIP_UPTIME_LEN),
+	       VTY_NEWLINE);
+    }
+}
+
+int
+rip_peer_list_cmp (struct rip_peer *p1, struct rip_peer *p2)
+{
+  return htonl (p1->addr.s_addr) > htonl (p2->addr.s_addr);
+}
+
+void
+rip_peer_init ()
+{
+  peer_list = list_new ();
+  peer_list->cmp = (int (*)(void *, void *)) rip_peer_list_cmp;
+}