[zebra] Routemap support on received routes, with 'set src' command (linux)

2007-05-01 David L Stevens <dlstevens@us.ibm.com>

	* (general) These changes collectively add route-map and
	  prefix-list support to zebra and fix a bug in "show
	  route-map" (with no argument).
	* doc/main.texi: added route-map, prefix-list, ip protocol
	  and set src documentation
	* lib/command.h: added PROTOCOL_NODE type
	* lib/log.c: (proto_name2num) new function, protocol name to
	  number translation.
	* lib/routemap.c: (vty_show_route_map) fixed "show route-map"
	  without route-map name
	* lib/routemap.h: added RMAP_ZEBRA type
	* lib/zebra.h: added proto_name2num() prototype
	* vtysh/extract.pl.in: added VTYSH_ZEBRA flag for route-map and
	  plist
	* vtysh/Makefile.am: added zebra_routemap.c
	* vtysh/vtysh.h: added VTYSH_ZEBRA flag to VTYSH_RMAP
	* zebra/connected.c: (connected_up_ipv4) added src preference argument
	  to rib_add_ipv4()
	* zebra/kernel_socket.c: (rtm_read) ditto
	* zebra/main.c: added prefix list initialization
	* zebra/Makefile.am: added zebra_routemap.c source file
	* zebra/rib.h: added generic address union "g_addr" and use in
	  existing places that had an explicit union.
	  Added "src" to struct nexthop.
	  Added preferred src arg to nexthop_ipv4_add and rib_add_ipv4.
	* zebra/rt_netlink.c: (netlink_routing_table) set preferred source on
	  netlink messages.
	  (netlink_route_change) ditto
	  (netlink_route_multipath) ditto.
	* zebra/rtread_getmsg.c: (handle_route_entry) added (NULL) src to
	  rib_add_ipv4() call.
	* zebra/rtread_proc.c: (proc_route_read) ditto
	* zebra/zebra_rib.c: (nexthop_ipv4_add) add src argument.
	  (nexthop_ipv4_ifindex_add) ditto
	  (rib_add_ipv4) ditto
	  (nexthop_active_check) Add route-map processing.
	* zebra/zebra_routemap.c: new file for zebra route-map commands.
	* zebra/zebra_vty.c: (ip_protocol_cmd) Apply route-map to protocol
	  (vty_show_ip_route_detail) added "src" printing
	  (vty_show_ip_route) ditto
	  (show_ip_protocol_cmd) new command, list routemaps.
	  (config_write_protocol) write out routemap protocl config.
	  (zebra_vty_init) Install the new routemap protocol commands.
	* zebra/zserv.c: (zread_ipv4_add) added (NULL) src arg
	  (zebra_init) init zebra route-maps.
	* zebra/zserv.h: add zebra_route_map_init

13 files changed, 341 insertions, 47 deletions

diff --git a/zebra/ChangeLog b/zebra/ChangeLog
index 11e406d4..c08bbe4e 100644
--- a/zebra/ChangeLog
+++ b/zebra/ChangeLog
@@ -1,3 +1,39 @@
+2007-05-01 David L Stevens <dlstevens@us.ibm.com>
+
+	* (general) These changes collectively add route-map and
+	  prefix-list support to zebra and fix a bug in "show
+	  route-map" (with no argument).
+	* connected.c: (connected_up_ipv4) added src preference argument
+	  to rib_add_ipv4()
+	* kernel_socket.c: (rtm_read) ditto
+	* main.c: added prefix list initialization
+	* Makefile.am: added zebra_routemap.c source file
+	* rib.h: added generic address union "g_addr" and use in
+	  existing places that had an explicit union.
+	  Added "src" to struct nexthop.
+	  Added preferred src arg to nexthop_ipv4_add and rib_add_ipv4.
+	* rt_netlink.c: (netlink_routing_table) set preferred source on 
+	  netlink messages.
+	  (netlink_route_change) ditto
+	  (netlink_route_multipath) ditto.
+	* rtread_getmsg.c: (handle_route_entry) added (NULL) src to
+	  rib_add_ipv4() call.
+	* rtread_proc.c: (proc_route_read) ditto
+	* zebra_rib.c: (nexthop_ipv4_add) add src argument.
+	  (nexthop_ipv4_ifindex_add) ditto
+	  (rib_add_ipv4) ditto
+	  (nexthop_active_check) Add route-map processing.
+	* zebra_routemap.c: new file for zebra route-map commands.
+	* zebra_vty.c: (ip_protocol_cmd) Apply route-map to protocol
+	  (vty_show_ip_route_detail) added "src" printing
+	  (vty_show_ip_route) ditto
+	  (show_ip_protocol_cmd) new command, list routemaps.
+	  (config_write_protocol) write out routemap protocl config.
+	  (zebra_vty_init) Install the new routemap protocol commands.
+	* zserv.c: (zread_ipv4_add) added (NULL) src arg
+	  (zebra_init) init zebra route-maps.
+	* zserv.h: add zebra_route_map_init
+	
 2007-04-29 Paul Jakma <paul.jakma@sun.com>
 
 	* ioctl{_solaris,}.c: (if_get_mtu) Fix missing ; in last commit.
diff --git a/zebra/Makefile.am b/zebra/Makefile.am
index 7527562a..5d8db411 100644
--- a/zebra/Makefile.am
+++ b/zebra/Makefile.am
@@ -24,7 +24,7 @@ sbin_PROGRAMS = zebra
 noinst_PROGRAMS = testzebra
 
 zebra_SOURCES = \
-	zserv.c main.c interface.c connected.c zebra_rib.c \
+	zserv.c main.c interface.c connected.c zebra_rib.c zebra_routemap.c \
 	redistribute.c debug.c rtadv.c zebra_snmp.c zebra_vty.c \
 	irdp_main.c irdp_interface.c irdp_packet.c router-id.c
 
diff --git a/zebra/connected.c b/zebra/connected.c
index 74e10ac6..53aa2543 100644
--- a/zebra/connected.c
+++ b/zebra/connected.c
@@ -187,8 +187,8 @@ connected_up_ipv4 (struct interface *ifp, struct connected *ifc)
   if (prefix_ipv4_any (&p))
     return;
 
-  rib_add_ipv4 (ZEBRA_ROUTE_CONNECT, 0, &p, NULL, ifp->ifindex, RT_TABLE_MAIN, 
-                ifp->metric, 0);
+  rib_add_ipv4 (ZEBRA_ROUTE_CONNECT, 0, &p, NULL, NULL, ifp->ifindex,
+	RT_TABLE_MAIN, ifp->metric, 0);
 
   rib_update ();
 }
diff --git a/zebra/kernel_socket.c b/zebra/kernel_socket.c
index 52812367..b7c7ccc1 100644
--- a/zebra/kernel_socket.c
+++ b/zebra/kernel_socket.c
@@ -775,7 +775,7 @@ rtm_read (struct rt_msghdr *rtm)
           || rtm->rtm_type == RTM_ADD
           || rtm->rtm_type == RTM_CHANGE)
 	rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, zebra_flags, 
-		      &p, &gate.sin.sin_addr, 0, 0, 0, 0);
+		      &p, &gate.sin.sin_addr, NULL, 0, 0, 0, 0);
       else
 	rib_delete_ipv4 (ZEBRA_ROUTE_KERNEL, zebra_flags, 
 		      &p, &gate.sin.sin_addr, 0, 0);
diff --git a/zebra/main.c b/zebra/main.c
index ed45bd13..7d895799 100644
--- a/zebra/main.c
+++ b/zebra/main.c
@@ -29,6 +29,7 @@
 #include "memory.h"
 #include "prefix.h"
 #include "log.h"
+#include "plist.h"
 #include "privs.h"
 #include "sigevent.h"
 
@@ -324,6 +325,7 @@ main (int argc, char **argv)
   router_id_init();
   zebra_vty_init ();
   access_list_init ();
+  prefix_list_init ();
   rtadv_init ();
 #ifdef HAVE_IRDP
   irdp_init();
diff --git a/zebra/rib.h b/zebra/rib.h
index 04fbbecf..7b2bd426 100644
--- a/zebra/rib.h
+++ b/zebra/rib.h
@@ -28,6 +28,14 @@
 #define DISTANCE_INFINITY  255
 
 /* Routing information base. */
+
+union g_addr {
+  struct in_addr ipv4;
+#ifdef HAVE_IPV6
+  struct in6_addr ipv6;
+#endif /* HAVE_IPV6 */
+};
+
 struct rib
 {
   /* Status Flags for the *route_node*, but kept in the head RIB.. */
@@ -167,24 +175,13 @@ struct nexthop
 #define NEXTHOP_FLAG_RECURSIVE  (1 << 2) /* Recursive nexthop. */
 
   /* Nexthop address or interface name. */
-  union
-  {
-    struct in_addr ipv4;
-#ifdef HAVE_IPV6
-    struct in6_addr ipv6;
-#endif /* HAVE_IPV6*/
-  } gate;
+  union g_addr gate;
 
   /* Recursive lookup nexthop. */
   u_char rtype;
   unsigned int rifindex;
-  union
-  {
-    struct in_addr ipv4;
-#ifdef HAVE_IPV6
-    struct in6_addr ipv6;
-#endif /* HAVE_IPV6 */
-  } rgate;
+  union g_addr rgate;
+  union g_addr src;
 };
 
 /* Routing table instance.  */
@@ -212,7 +209,8 @@ struct vrf
 extern struct nexthop *nexthop_ifindex_add (struct rib *, unsigned int);
 extern struct nexthop *nexthop_ifname_add (struct rib *, char *);
 extern struct nexthop *nexthop_blackhole_add (struct rib *);
-extern struct nexthop *nexthop_ipv4_add (struct rib *, struct in_addr *);
+extern struct nexthop *nexthop_ipv4_add (struct rib *, struct in_addr *,
+					 struct in_addr *);
 #ifdef HAVE_IPV6
 extern struct nexthop *nexthop_ipv6_add (struct rib *, struct in6_addr *);
 #endif /* HAVE_IPV6 */
@@ -225,8 +223,9 @@ extern struct route_table *vrf_static_table (afi_t afi, safi_t safi, u_int32_t i
  * All rib_add_ipv[46]* functions will not just add prefix into RIB, but
  * also implicitly withdraw equal prefix of same type. */
 extern int rib_add_ipv4 (int type, int flags, struct prefix_ipv4 *p, 
-			 struct in_addr *gate, unsigned int ifindex, 
-			 u_int32_t vrf_id, u_int32_t, u_char);
+			 struct in_addr *gate, struct in_addr *src,
+			 unsigned int ifindex, u_int32_t vrf_id,
+			 u_int32_t, u_char);
 
 extern int rib_add_ipv4_multipath (struct prefix_ipv4 *, struct rib *);
 
diff --git a/zebra/rt_netlink.c b/zebra/rt_netlink.c
index e2f1f9d9..3b602c45 100644
--- a/zebra/rt_netlink.c
+++ b/zebra/rt_netlink.c
@@ -725,6 +725,7 @@ netlink_routing_table (struct sockaddr_nl *snl, struct nlmsghdr *h)
 
   void *dest;
   void *gate;
+  void *src;
 
   rtm = NLMSG_DATA (h);
 
@@ -764,6 +765,7 @@ netlink_routing_table (struct sockaddr_nl *snl, struct nlmsghdr *h)
   metric = 0;
   dest = NULL;
   gate = NULL;
+  src = NULL;
 
   if (tb[RTA_OIF])
     index = *(int *) RTA_DATA (tb[RTA_OIF]);
@@ -773,6 +775,9 @@ netlink_routing_table (struct sockaddr_nl *snl, struct nlmsghdr *h)
   else
     dest = anyaddr;
 
+  if (tb[RTA_PREFSRC])
+    src = RTA_DATA (tb[RTA_PREFSRC]);
+
   /* Multipath treatment is needed. */
   if (tb[RTA_GATEWAY])
     gate = RTA_DATA (tb[RTA_GATEWAY]);
@@ -787,7 +792,7 @@ netlink_routing_table (struct sockaddr_nl *snl, struct nlmsghdr *h)
       memcpy (&p.prefix, dest, 4);
       p.prefixlen = rtm->rtm_dst_len;
 
-      rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, flags, &p, gate, index, table, metric, 0);
+      rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, flags, &p, gate, src, index, table, metric, 0);
     }
 #ifdef HAVE_IPV6
   if (rtm->rtm_family == AF_INET6)
@@ -834,6 +839,7 @@ netlink_route_change (struct sockaddr_nl *snl, struct nlmsghdr *h)
   int table;
   void *dest;
   void *gate;
+  void *src;
 
   rtm = NLMSG_DATA (h);
 
@@ -890,6 +896,7 @@ netlink_route_change (struct sockaddr_nl *snl, struct nlmsghdr *h)
   index = 0;
   dest = NULL;
   gate = NULL;
+  src = NULL;
 
   if (tb[RTA_OIF])
     index = *(int *) RTA_DATA (tb[RTA_OIF]);
@@ -902,6 +909,9 @@ netlink_route_change (struct sockaddr_nl *snl, struct nlmsghdr *h)
   if (tb[RTA_GATEWAY])
     gate = RTA_DATA (tb[RTA_GATEWAY]);
 
+  if (tb[RTA_PREFSRC])
+    src = RTA_DATA (tb[RTA_PREFSRC]);
+
   if (rtm->rtm_family == AF_INET)
     {
       struct prefix_ipv4 p;
@@ -920,7 +930,7 @@ netlink_route_change (struct sockaddr_nl *snl, struct nlmsghdr *h)
         }
 
       if (h->nlmsg_type == RTM_NEWROUTE)
-        rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, 0, &p, gate, index, table, 0, 0);
+        rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, 0, &p, gate, src, index, table, 0, 0);
       else
         rib_delete_ipv4 (ZEBRA_ROUTE_KERNEL, 0, &p, gate, index, table);
     }
@@ -1489,7 +1499,9 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib,
 		    {
 		      addattr_l (&req.n, sizeof req, RTA_GATEWAY,
 				 &nexthop->rgate.ipv4, bytelen);
-
+                      if (nexthop->src.ipv4.s_addr)
+		          addattr_l(&req.n, sizeof req, RTA_PREFSRC,
+				     &nexthop->src.ipv4, bytelen);
 		      if (IS_ZEBRA_DEBUG_KERNEL)
 			zlog_debug("netlink_route_multipath() (recursive, "
 				   "1 hop): nexthop via %s if %u",
@@ -1519,6 +1531,11 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib,
 		    {
 		      addattr32 (&req.n, sizeof req, RTA_OIF,
 				 nexthop->rifindex);
+                      if ((nexthop->rtype == NEXTHOP_TYPE_IPV4_IFINDEX
+                           || nexthop->rtype == NEXTHOP_TYPE_IFINDEX)
+                          && nexthop->src.ipv4.s_addr)
+                        addattr_l (&req.n, sizeof req, RTA_PREFSRC,
+				 &nexthop->src.ipv4, bytelen);
 
 		      if (IS_ZEBRA_DEBUG_KERNEL)
 			zlog_debug("netlink_route_multipath() (recursive, "
@@ -1547,6 +1564,9 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib,
 		    {
 		      addattr_l (&req.n, sizeof req, RTA_GATEWAY,
 				 &nexthop->gate.ipv4, bytelen);
+		      if (nexthop->src.ipv4.s_addr)
+                        addattr_l (&req.n, sizeof req, RTA_PREFSRC,
+				 &nexthop->src.ipv4, bytelen);
 
 		      if (IS_ZEBRA_DEBUG_KERNEL)
 			zlog_debug("netlink_route_multipath() (single hop): "
@@ -1571,8 +1591,19 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib,
 #endif /* HAVE_IPV6 */
                   if (nexthop->type == NEXTHOP_TYPE_IFINDEX
                       || nexthop->type == NEXTHOP_TYPE_IFNAME
-                      || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX
-                      || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX
+                      || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX)
+		    {
+		      addattr32 (&req.n, sizeof req, RTA_OIF, nexthop->ifindex);
+
+		      if (nexthop->src.ipv4.s_addr)
+                        addattr_l (&req.n, sizeof req, RTA_PREFSRC,
+				 &nexthop->src.ipv4, bytelen);
+
+		      if (IS_ZEBRA_DEBUG_KERNEL)
+			zlog_debug("netlink_route_multipath() (single hop): "
+				   "nexthop via if %u", nexthop->ifindex);
+		    }
+                  else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX
                       || nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME)
 		    {
 		      addattr32 (&req.n, sizeof req, RTA_OIF, nexthop->ifindex);
@@ -1596,6 +1627,7 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib,
       char buf[1024];
       struct rtattr *rta = (void *) buf;
       struct rtnexthop *rtnh;
+      union g_addr *src = NULL;
 
       rta->rta_type = RTA_MULTIPATH;
       rta->rta_len = RTA_LENGTH (0);
@@ -1640,6 +1672,9 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib,
                                      &nexthop->rgate.ipv4, bytelen);
                       rtnh->rtnh_len += sizeof (struct rtattr) + 4;
 
+		      if (nexthop->src.ipv4.s_addr)
+                        src = &nexthop->src;
+
 		      if (IS_ZEBRA_DEBUG_KERNEL)
 			zlog_debug("netlink_route_multipath() (recursive, "
 				   "multihop): nexthop via %s if %u",
@@ -1662,10 +1697,20 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib,
 		    }
 #endif /* HAVE_IPV6 */
                   /* ifindex */
-                  if (nexthop->rtype == NEXTHOP_TYPE_IFINDEX
-                      || nexthop->rtype == NEXTHOP_TYPE_IFNAME
-                      || nexthop->rtype == NEXTHOP_TYPE_IPV4_IFINDEX
-                      || nexthop->rtype == NEXTHOP_TYPE_IPV6_IFINDEX
+                  if (nexthop->rtype == NEXTHOP_TYPE_IPV4_IFINDEX
+		      || nexthop->rtype == NEXTHOP_TYPE_IFINDEX
+                      || nexthop->rtype == NEXTHOP_TYPE_IFNAME)
+		    {
+		      rtnh->rtnh_ifindex = nexthop->rifindex;
+                      if (nexthop->src.ipv4.s_addr)
+                        src = &nexthop->src;
+
+		      if (IS_ZEBRA_DEBUG_KERNEL)
+			zlog_debug("netlink_route_multipath() (recursive, "
+				   "multihop): nexthop via if %u",
+				   nexthop->rifindex);
+		    }
+		  else if (nexthop->rtype == NEXTHOP_TYPE_IPV6_IFINDEX
                       || nexthop->rtype == NEXTHOP_TYPE_IPV6_IFNAME)
 		    {
 		      rtnh->rtnh_ifindex = nexthop->rifindex;
@@ -1701,6 +1746,9 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib,
 				     &nexthop->gate.ipv4, bytelen);
 		      rtnh->rtnh_len += sizeof (struct rtattr) + 4;
 
+		      if (nexthop->src.ipv4.s_addr)
+                        src = &nexthop->src;
+
                       if (IS_ZEBRA_DEBUG_KERNEL)
 			zlog_debug("netlink_route_multipath() (multihop): "
 				   "nexthop via %s if %u",
@@ -1723,10 +1771,18 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib,
 		    }
 #endif /* HAVE_IPV6 */
                   /* ifindex */
-                  if (nexthop->type == NEXTHOP_TYPE_IFINDEX
-                      || nexthop->type == NEXTHOP_TYPE_IFNAME
-                      || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX
-                      || nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME
+                  if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX
+		      || nexthop->type == NEXTHOP_TYPE_IFINDEX
+                      || nexthop->type == NEXTHOP_TYPE_IFNAME)
+                    {
+		      rtnh->rtnh_ifindex = nexthop->ifindex;
+		      if (nexthop->src.ipv4.s_addr)
+			src = &nexthop->src;
+		      if (IS_ZEBRA_DEBUG_KERNEL)
+			zlog_debug("netlink_route_multipath() (multihop): "
+				   "nexthop via if %u", nexthop->ifindex);
+		    }
+                  else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME
                       || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)
 		    {
 		      rtnh->rtnh_ifindex = nexthop->ifindex;
@@ -1746,6 +1802,8 @@ netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib,
                 SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB);
             }
         }
+      if (src)
+        addattr_l (&req.n, sizeof req, RTA_PREFSRC, &src->ipv4, bytelen);
 
       if (rta->rta_len > RTA_LENGTH (0))
         addattr_l (&req.n, 1024, RTA_MULTIPATH, RTA_DATA (rta),
diff --git a/zebra/rtread_getmsg.c b/zebra/rtread_getmsg.c
index 1b0c8965..3e065c6f 100644
--- a/zebra/rtread_getmsg.c
+++ b/zebra/rtread_getmsg.c
@@ -90,7 +90,7 @@ handle_route_entry (mib2_ipRouteEntry_t *routeEntry)
 	gateway.s_addr = routeEntry->ipRouteNextHop;
 
 	rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, zebra_flags, &prefix,
-		      &gateway, 0, 0, 0, 0);
+		      &gateway, NULL, 0, 0, 0, 0);
 }
 
 void
diff --git a/zebra/rtread_proc.c b/zebra/rtread_proc.c
index 93ec238f..1de435a4 100644
--- a/zebra/rtread_proc.c
+++ b/zebra/rtread_proc.c
@@ -96,7 +96,7 @@ proc_route_read (void)
       p.prefixlen = ip_masklen (tmpmask);
       sscanf (gate, "%lX", (unsigned long *)&gateway);
 
-      rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, zebra_flags, &p, &gateway, 0, 0, 0, 0);
+      rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, zebra_flags, &p, &gateway, NULL, 0, 0, 0, 0);
     }
 
   fclose (fp);
diff --git a/zebra/zebra_rib.c b/zebra/zebra_rib.c
index 02c73d12..693b3331 100644
--- a/zebra/zebra_rib.c
+++ b/zebra/zebra_rib.c
@@ -32,6 +32,8 @@
 #include "linklist.h"
 #include "thread.h"
 #include "workqueue.h"
+#include "prefix.h"
+#include "routemap.h"
 
 #include "zebra/rib.h"
 #include "zebra/rt.h"
@@ -233,7 +235,7 @@ nexthop_ifname_add (struct rib *rib, char *ifname)
 }
 
 struct nexthop *
-nexthop_ipv4_add (struct rib *rib, struct in_addr *ipv4)
+nexthop_ipv4_add (struct rib *rib, struct in_addr *ipv4, struct in_addr *src)
 {
   struct nexthop *nexthop;
 
@@ -241,6 +243,8 @@ nexthop_ipv4_add (struct rib *rib, struct in_addr *ipv4)
   memset (nexthop, 0, sizeof (struct nexthop));
   nexthop->type = NEXTHOP_TYPE_IPV4;
   nexthop->gate.ipv4 = *ipv4;
+  if (src)
+    nexthop->src.ipv4 = *src;
 
   nexthop_add (rib, nexthop);
 
@@ -249,7 +253,7 @@ nexthop_ipv4_add (struct rib *rib, struct in_addr *ipv4)
 
 static struct nexthop *
 nexthop_ipv4_ifindex_add (struct rib *rib, struct in_addr *ipv4, 
-			  unsigned int ifindex)
+                          struct in_addr *src, unsigned int ifindex)
 {
   struct nexthop *nexthop;
 
@@ -257,6 +261,8 @@ nexthop_ipv4_ifindex_add (struct rib *rib, struct in_addr *ipv4,
   memset (nexthop, 0, sizeof (struct nexthop));
   nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX;
   nexthop->gate.ipv4 = *ipv4;
+  if (src)
+    nexthop->src.ipv4 = *src;
   nexthop->ifindex = ifindex;
 
   nexthop_add (rib, nexthop);
@@ -685,12 +691,20 @@ rib_match_ipv6 (struct in6_addr *addr)
 }
 #endif /* HAVE_IPV6 */
 
+#define RIB_SYSTEM_ROUTE(R) \
+        ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT)
+
 static int
 nexthop_active_check (struct route_node *rn, struct rib *rib,
 		      struct nexthop *nexthop, int set)
 {
   struct interface *ifp;
+  route_map_result_t ret = RMAP_MATCH;
+  extern char *proto_rm[AFI_MAX][ZEBRA_ROUTE_MAX+1];
+  struct route_map *rmap;
+  int family;
 
+  family = 0;
   switch (nexthop->type)
     {
     case NEXTHOP_TYPE_IFINDEX:
@@ -700,8 +714,9 @@ nexthop_active_check (struct route_node *rn, struct rib *rib,
       else
 	UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE);
       break;
-    case NEXTHOP_TYPE_IFNAME:
     case NEXTHOP_TYPE_IPV6_IFNAME:
+      family = AFI_IP6;
+    case NEXTHOP_TYPE_IFNAME:
       ifp = if_lookup_by_name (nexthop->ifname);
       if (ifp && if_is_up (ifp))
 	{
@@ -718,6 +733,7 @@ nexthop_active_check (struct route_node *rn, struct rib *rib,
       break;
     case NEXTHOP_TYPE_IPV4:
     case NEXTHOP_TYPE_IPV4_IFINDEX:
+      family = AFI_IP;
       if (nexthop_active_ipv4 (rib, nexthop, set, rn))
 	SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE);
       else
@@ -725,12 +741,14 @@ nexthop_active_check (struct route_node *rn, struct rib *rib,
       break;
 #ifdef HAVE_IPV6
     case NEXTHOP_TYPE_IPV6:
+      family = AFI_IP6;
       if (nexthop_active_ipv6 (rib, nexthop, set, rn))
 	SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE);
       else
 	UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE);
       break;
     case NEXTHOP_TYPE_IPV6_IFINDEX:
+      family = AFI_IP6;
       if (IN6_IS_ADDR_LINKLOCAL (&nexthop->gate.ipv6))
 	{
 	  ifp = if_lookup_by_index (nexthop->ifindex);
@@ -754,6 +772,26 @@ nexthop_active_check (struct route_node *rn, struct rib *rib,
     default:
       break;
     }
+  if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE))
+    return 0;
+
+  if (RIB_SYSTEM_ROUTE(rib) ||
+      (family == AFI_IP && rn->p.family != AF_INET) ||
+      (family == AFI_IP6 && rn->p.family != AF_INET6))
+    return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE);
+
+  rmap = 0;
+  if (rib->type >= 0 && rib->type < ZEBRA_ROUTE_MAX &&
+        	proto_rm[family][rib->type])
+    rmap = route_map_lookup_by_name (proto_rm[family][rib->type]);
+  if (!rmap && proto_rm[family][ZEBRA_ROUTE_MAX])
+    rmap = route_map_lookup_by_name (proto_rm[family][ZEBRA_ROUTE_MAX]);
+  if (rmap) {
+      ret = route_map_apply(rmap, &rn->p, RMAP_ZEBRA, nexthop);
+  }
+
+  if (ret == RMAP_DENYMATCH)
+    UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE);
   return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE);
 }
 
@@ -782,8 +820,6 @@ nexthop_active_update (struct route_node *rn, struct rib *rib, int set)
 }
 
 
-#define RIB_SYSTEM_ROUTE(R) \
-        ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT)
 
 static void
 rib_install_kernel (struct route_node *rn, struct rib *rib)
@@ -1231,7 +1267,8 @@ rib_delnode (struct route_node *rn, struct rib *rib)
 
 int
 rib_add_ipv4 (int type, int flags, struct prefix_ipv4 *p, 
-	      struct in_addr *gate, unsigned int ifindex, u_int32_t vrf_id,
+	      struct in_addr *gate, struct in_addr *src,
+	      unsigned int ifindex, u_int32_t vrf_id,
 	      u_int32_t metric, u_char distance)
 {
   struct rib *rib;
@@ -1300,9 +1337,9 @@ rib_add_ipv4 (int type, int flags, struct prefix_ipv4 *p,
   if (gate)
     {
       if (ifindex)
-	nexthop_ipv4_ifindex_add (rib, gate, ifindex);
+	nexthop_ipv4_ifindex_add (rib, gate, src, ifindex);
       else
-	nexthop_ipv4_add (rib, gate);
+	nexthop_ipv4_add (rib, gate, src);
     }
   else
     nexthop_ifindex_add (rib, ifindex);
@@ -1539,7 +1576,7 @@ static_install_ipv4 (struct prefix *p, struct static_ipv4 *si)
       switch (si->type)
         {
           case STATIC_IPV4_GATEWAY:
-            nexthop_ipv4_add (rib, &si->gate.ipv4);
+            nexthop_ipv4_add (rib, &si->gate.ipv4, NULL);
             break;
           case STATIC_IPV4_IFNAME:
             nexthop_ifname_add (rib, si->gate.ifname);
@@ -1563,7 +1600,7 @@ static_install_ipv4 (struct prefix *p, struct static_ipv4 *si)
       switch (si->type)
         {
           case STATIC_IPV4_GATEWAY:
-            nexthop_ipv4_add (rib, &si->gate.ipv4);
+            nexthop_ipv4_add (rib, &si->gate.ipv4, NULL);
             break;
           case STATIC_IPV4_IFNAME:
             nexthop_ifname_add (rib, si->gate.ifname);
diff --git a/zebra/zebra_vty.c b/zebra/zebra_vty.c
index 68e6f920..1487745b 100644
--- a/zebra/zebra_vty.c
+++ b/zebra/zebra_vty.c
@@ -21,6 +21,7 @@
 
 #include <zebra.h>
 
+#include "memory.h"
 #include "if.h"
 #include "prefix.h"
 #include "command.h"
@@ -474,6 +475,59 @@ DEFUN (no_ip_route_mask_flags_distance2,
   return zebra_static_ipv4 (vty, 0, argv[0], argv[1], NULL, argv[2], argv[3]);
 }
 
+char *proto_rm[AFI_MAX][ZEBRA_ROUTE_MAX+1];	/* "any" == ZEBRA_ROUTE_MAX */
+
+DEFUN (ip_protocol,
+       ip_protocol_cmd,
+       "ip protocol PROTO route-map ROUTE-MAP",
+       NO_STR
+       "Apply route map to PROTO\n"
+       "Protocol name\n"
+       "Route map name\n")
+{
+  int i;
+
+  if (strcasecmp(argv[0], "any") == 0)
+    i = ZEBRA_ROUTE_MAX;
+  else
+    i = proto_name2num(argv[0]);
+  if (i < 0)
+    {
+      vty_out (vty, "invalid protocol name \"%s\"%s", argv[0] ? argv[0] : "",
+               VTY_NEWLINE);
+      return CMD_WARNING;
+    }
+  if (proto_rm[AFI_IP][i])
+    XFREE (MTYPE_ROUTE_MAP_NAME, proto_rm[AFI_IP][i]);
+  proto_rm[AFI_IP][i] = XSTRDUP (MTYPE_ROUTE_MAP_NAME, argv[1]);
+  return CMD_SUCCESS;
+}
+
+DEFUN (no_ip_protocol,
+       no_ip_protocol_cmd,
+       "no ip protocol PROTO",
+       NO_STR
+       "Remove route map from PROTO\n"
+       "Protocol name\n")
+{
+  int i;
+
+  if (strcasecmp(argv[0], "any") == 0)
+    i = ZEBRA_ROUTE_MAX;
+  else
+    i = proto_name2num(argv[0]);
+  if (i < 0)
+    {
+      vty_out (vty, "invalid protocol name \"%s\"%s", argv[0] ? argv[0] : "",
+               VTY_NEWLINE);
+     return CMD_WARNING;
+    }
+  if (proto_rm[AFI_IP][i])
+    XFREE (MTYPE_ROUTE_MAP_NAME, proto_rm[AFI_IP][i]);
+  proto_rm[AFI_IP][i] = NULL;
+  return CMD_SUCCESS;
+}
+
 /* New RIB.  Detailed information for IPv4 route. */
 static void
 vty_show_ip_route_detail (struct vty *vty, struct route_node *rn)
@@ -529,6 +583,8 @@ vty_show_ip_route_detail (struct vty *vty, struct route_node *rn)
 
       for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next)
 	{
+          char addrstr[32];
+
 	  vty_out (vty, "  %c",
 		   CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB) ? '*' : ' ');
 
@@ -575,6 +631,31 @@ vty_show_ip_route_detail (struct vty *vty, struct route_node *rn)
 		  break;
 		}
 	    }
+	  switch (nexthop->type)
+            {
+            case NEXTHOP_TYPE_IPV4:
+            case NEXTHOP_TYPE_IPV4_IFINDEX:
+            case NEXTHOP_TYPE_IPV4_IFNAME:
+              if (nexthop->src.ipv4.s_addr)
+                {
+		  if (inet_ntop(AF_INET, &nexthop->src.ipv4, addrstr,
+		      sizeof addrstr))
+                    vty_out (vty, ", src %s", addrstr);
+                }
+              break;
+            case NEXTHOP_TYPE_IPV6:
+            case NEXTHOP_TYPE_IPV6_IFINDEX:
+            case NEXTHOP_TYPE_IPV6_IFNAME:
+              if (!IPV6_ADDR_SAME(&nexthop->src.ipv6, &in6addr_any))
+                {
+		  if (inet_ntop(AF_INET6, &nexthop->src.ipv6, addrstr,
+		      sizeof addrstr))
+                    vty_out (vty, ", src %s", addrstr);
+                }
+              break;
+            default:
+	       break;
+            }
 	  vty_out (vty, "%s", VTY_NEWLINE);
 	}
       vty_out (vty, "%s", VTY_NEWLINE);
@@ -658,6 +739,29 @@ vty_show_ip_route (struct vty *vty, struct route_node *rn, struct rib *rib)
 	      break;
 	    }
 	}
+      switch (nexthop->type)
+        {
+          case NEXTHOP_TYPE_IPV4:
+          case NEXTHOP_TYPE_IPV4_IFINDEX:
+          case NEXTHOP_TYPE_IPV4_IFNAME:
+            if (nexthop->src.ipv4.s_addr)
+              {
+		if (inet_ntop(AF_INET, &nexthop->src.ipv4, buf, sizeof buf))
+                  vty_out (vty, ", src %s", buf);
+              }
+            break;
+          case NEXTHOP_TYPE_IPV6:
+          case NEXTHOP_TYPE_IPV6_IFINDEX:
+          case NEXTHOP_TYPE_IPV6_IFNAME:
+            if (!IPV6_ADDR_SAME(&nexthop->src.ipv6, &in6addr_any))
+              {
+		if (inet_ntop(AF_INET6, &nexthop->src.ipv6, buf, sizeof buf))
+                  vty_out (vty, ", src %s", buf);
+              }
+            break;
+          default:
+	    break;
+        }
 
       if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_BLACKHOLE))
                vty_out (vty, ", bh");
@@ -1805,6 +1909,34 @@ DEFUN (show_ipv6_route_prefix,
   return CMD_SUCCESS;
 }
 
+DEFUN (show_ip_protocol,
+       show_ip_protocol_cmd,
+       "show ip protocol",
+        SHOW_STR
+        IP_STR
+       "IP protocol filtering status\n")
+{
+    int i; 
+
+    vty_out(vty, "Protocol    : route-map %s", VTY_NEWLINE);
+    vty_out(vty, "------------------------%s", VTY_NEWLINE);
+    for (i=0;i<ZEBRA_ROUTE_MAX;i++)
+    {
+        if (proto_rm[AFI_IP][i])
+          vty_out (vty, "%-10s  : %-10s%s", zebra_route_string(i),
+					proto_rm[AFI_IP][i],
+					VTY_NEWLINE);
+        else
+          vty_out (vty, "%-10s  : none%s", zebra_route_string(i), VTY_NEWLINE);
+    }
+    if (proto_rm[AFI_IP][i])
+      vty_out (vty, "%-10s  : %-10s%s", "any", proto_rm[AFI_IP][i],
+					VTY_NEWLINE);
+    else
+      vty_out (vty, "%-10s  : none%s", "any", VTY_NEWLINE);
+
+    return CMD_SUCCESS;
+}
 
 /* Write IPv6 static route configuration. */
 static int
@@ -1874,6 +2006,27 @@ zebra_ip_config (struct vty *vty)
   return write;
 }
 
+/* ip protocol configuration write function */
+static int config_write_protocol(struct vty *vty)
+{  
+  int i;
+
+  for (i=0;i<ZEBRA_ROUTE_MAX;i++)
+    {
+      if (proto_rm[AFI_IP][i])
+        vty_out (vty, "ip protocol %s route-map %s%s", zebra_route_string(i),
+                 proto_rm[AFI_IP][i], VTY_NEWLINE);
+    }
+  if (proto_rm[AFI_IP][ZEBRA_ROUTE_MAX])
+      vty_out (vty, "ip protocol %s route-map %s%s", "any",
+               proto_rm[AFI_IP][ZEBRA_ROUTE_MAX], VTY_NEWLINE);
+
+  return 1;
+}   
+
+/* table node for protocol filtering */
+struct cmd_node protocol_node = { PROTOCOL_NODE, "", 1 };
+
 /* IP node for static routes. */
 struct cmd_node ip_node = { IP_NODE,  "",  1 };
 
@@ -1882,7 +2035,12 @@ void
 zebra_vty_init (void)
 {
   install_node (&ip_node, zebra_ip_config);
+  install_node (&protocol_node, config_write_protocol);
 
+  install_element (CONFIG_NODE, &ip_protocol_cmd);
+  install_element (CONFIG_NODE, &no_ip_protocol_cmd);
+  install_element (VIEW_NODE, &show_ip_protocol_cmd);
+  install_element (ENABLE_NODE, &show_ip_protocol_cmd);
   install_element (CONFIG_NODE, &ip_route_cmd);
   install_element (CONFIG_NODE, &ip_route_flags_cmd);
   install_element (CONFIG_NODE, &ip_route_flags2_cmd);
diff --git a/zebra/zserv.c b/zebra/zserv.c
index 1703d3f5..22a6bed2 100644
--- a/zebra/zserv.c
+++ b/zebra/zserv.c
@@ -781,7 +781,7 @@ zread_ipv4_add (struct zserv *client, u_short length)
 	      break;
 	    case ZEBRA_NEXTHOP_IPV4:
 	      nexthop.s_addr = stream_get_ipv4 (s);
-	      nexthop_ipv4_add (rib, &nexthop);
+	      nexthop_ipv4_add (rib, &nexthop, NULL);
 	      break;
 	    case ZEBRA_NEXTHOP_IPV6:
 	      stream_forward_getp (s, IPV6_MAX_BYTELEN);
@@ -1733,4 +1733,7 @@ zebra_init (void)
   install_element (CONFIG_NODE, &ipv6_forwarding_cmd);
   install_element (CONFIG_NODE, &no_ipv6_forwarding_cmd);
 #endif /* HAVE_IPV6 */
+
+  /* Route-map */
+  zebra_route_map_init ();
 }
diff --git a/zebra/zserv.h b/zebra/zserv.h
index 9a570fb3..68c26f23 100644
--- a/zebra/zserv.h
+++ b/zebra/zserv.h
@@ -93,6 +93,7 @@ extern void rib_init (void);
 extern void interface_list (void);
 extern void kernel_init (void);
 extern void route_read (void);
+extern void zebra_route_map_init (void);
 extern void zebra_snmp_init (void);
 extern void zebra_vty_init (void);