1 files changed, 254 insertions, 0 deletions
diff --git a/ripd/rip_zebra.c b/ripd/rip_zebra.c
new file mode 100644
index 0000000..1f15668
--- /dev/null
+++ b/ripd/rip_zebra.c
@@ -0,0 +1,254 @@
+/* RIPd and zebra interface.
+ * Copyright (C) 1997, 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 this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <zebra.h>
+
+#include "command.h"
+#include "prefix.h"
+#include "table.h"
+#include "stream.h"
+#include "memory.h"
+#include "zclient.h"
+#include "log.h"
+#include "vrf.h"
+#include "ripd/ripd.h"
+#include "ripd/rip_debug.h"
+#include "ripd/rip_interface.h"
+
+/* All information about zebra. */
+struct zclient *zclient = NULL;
+
+/* Send ECMP routes to zebra. */
+static void rip_zebra_ipv4_send(struct rip *rip, struct route_node *rp,
+				uint8_t cmd)
+{
+	struct list *list = (struct list *)rp->info;
+	struct zapi_route api;
+	struct zapi_nexthop *api_nh;
+	struct listnode *listnode = NULL;
+	struct rip_info *rinfo = NULL;
+	int count = 0;
+
+	memset(&api, 0, sizeof(api));
+	api.vrf_id = rip->vrf->vrf_id;
+	api.type = ZEBRA_ROUTE_RIP;
+	api.safi = SAFI_UNICAST;
+
+	SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
+	for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) {
+		if (count >= MULTIPATH_NUM)
+			break;
+		api_nh = &api.nexthops[count];
+		api_nh->vrf_id = rip->vrf->vrf_id;
+		api_nh->gate = rinfo->nh.gate;
+		api_nh->type = NEXTHOP_TYPE_IPV4;
+		if (cmd == ZEBRA_ROUTE_ADD)
+			SET_FLAG(rinfo->flags, RIP_RTF_FIB);
+		else
+			UNSET_FLAG(rinfo->flags, RIP_RTF_FIB);
+		count++;
+	}
+
+	api.prefix = rp->p;
+	api.nexthop_num = count;
+
+	rinfo = listgetdata(listhead(list));
+
+	SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
+	api.metric = rinfo->metric;
+
+	if (rinfo->distance && rinfo->distance != ZEBRA_RIP_DISTANCE_DEFAULT) {
+		SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE);
+		api.distance = rinfo->distance;
+	}
+
+	if (rinfo->tag) {
+		SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
+		api.tag = rinfo->tag;
+	}
+
+	zclient_route_send(cmd, zclient, &api);
+
+	if (IS_RIP_DEBUG_ZEBRA) {
+		if (rip->ecmp)
+			zlog_debug("%s: %pFX nexthops %d",
+				   (cmd == ZEBRA_ROUTE_ADD)
+					   ? "Install into zebra"
+					   : "Delete from zebra",
+				   &rp->p, count);
+		else
+			zlog_debug("%s: %pFX",
+				   (cmd == ZEBRA_ROUTE_ADD)
+					   ? "Install into zebra"
+					   : "Delete from zebra", &rp->p);
+	}
+
+	rip->counters.route_changes++;
+}
+
+/* Add/update ECMP routes to zebra. */
+void rip_zebra_ipv4_add(struct rip *rip, struct route_node *rp)
+{
+	rip_zebra_ipv4_send(rip, rp, ZEBRA_ROUTE_ADD);
+}
+
+/* Delete ECMP routes from zebra. */
+void rip_zebra_ipv4_delete(struct rip *rip, struct route_node *rp)
+{
+	rip_zebra_ipv4_send(rip, rp, ZEBRA_ROUTE_DELETE);
+}
+
+/* Zebra route add and delete treatment. */
+static int rip_zebra_read_route(ZAPI_CALLBACK_ARGS)
+{
+	struct rip *rip;
+	struct zapi_route api;
+	struct nexthop nh;
+
+	rip = rip_lookup_by_vrf_id(vrf_id);
+	if (!rip)
+		return 0;
+
+	if (zapi_route_decode(zclient->ibuf, &api) < 0)
+		return -1;
+
+	memset(&nh, 0, sizeof(nh));
+	nh.type = api.nexthops[0].type;
+	nh.gate.ipv4 = api.nexthops[0].gate.ipv4;
+	nh.ifindex = api.nexthops[0].ifindex;
+
+	/* Then fetch IPv4 prefixes. */
+	if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
+		rip_redistribute_add(rip, api.type, RIP_ROUTE_REDISTRIBUTE,
+				     (struct prefix_ipv4 *)&api.prefix, &nh,
+				     api.metric, api.distance, api.tag);
+	else if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_DEL)
+		rip_redistribute_delete(rip, api.type, RIP_ROUTE_REDISTRIBUTE,
+					(struct prefix_ipv4 *)&api.prefix,
+					nh.ifindex);
+
+	return 0;
+}
+
+void rip_redistribute_conf_update(struct rip *rip, int type)
+{
+	zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP,
+				type, 0, rip->vrf->vrf_id);
+}
+
+void rip_redistribute_conf_delete(struct rip *rip, int type)
+{
+	if (zclient->sock > 0)
+		zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE, zclient,
+					AFI_IP, type, 0, rip->vrf->vrf_id);
+
+	/* Remove the routes from RIP table. */
+	rip_redistribute_withdraw(rip, type);
+}
+
+int rip_redistribute_check(struct rip *rip, int type)
+{
+	return rip->redist[type].enabled;
+}
+
+void rip_redistribute_enable(struct rip *rip)
+{
+	for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) {
+		if (!rip_redistribute_check(rip, i))
+			continue;
+
+		zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP,
+					i, 0, rip->vrf->vrf_id);
+	}
+}
+
+void rip_redistribute_disable(struct rip *rip)
+{
+	for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) {
+		if (!rip_redistribute_check(rip, i))
+			continue;
+
+		zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE, zclient,
+					AFI_IP, i, 0, rip->vrf->vrf_id);
+	}
+}
+
+void rip_show_redistribute_config(struct vty *vty, struct rip *rip)
+{
+	for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) {
+		if (i == zclient->redist_default
+		    || !rip_redistribute_check(rip, i))
+			continue;
+
+		vty_out(vty, " %s", zebra_route_string(i));
+	}
+}
+
+void rip_zebra_vrf_register(struct vrf *vrf)
+{
+	if (vrf->vrf_id == VRF_DEFAULT)
+		return;
+
+	if (IS_RIP_DEBUG_EVENT)
+		zlog_debug("%s: register VRF %s(%u) to zebra", __func__,
+			   vrf->name, vrf->vrf_id);
+
+	zclient_send_reg_requests(zclient, vrf->vrf_id);
+}
+
+void rip_zebra_vrf_deregister(struct vrf *vrf)
+{
+	if (vrf->vrf_id == VRF_DEFAULT)
+		return;
+
+	if (IS_RIP_DEBUG_EVENT)
+		zlog_debug("%s: deregister VRF %s(%u) from zebra.", __func__,
+			   vrf->name, vrf->vrf_id);
+
+	zclient_send_dereg_requests(zclient, vrf->vrf_id);
+}
+
+static void rip_zebra_connected(struct zclient *zclient)
+{
+	zclient_send_reg_requests(zclient, VRF_DEFAULT);
+}
+
+zclient_handler *const rip_handlers[] = {
+	[ZEBRA_INTERFACE_ADDRESS_ADD] = rip_interface_address_add,
+	[ZEBRA_INTERFACE_ADDRESS_DELETE] = rip_interface_address_delete,
+	[ZEBRA_INTERFACE_VRF_UPDATE] = rip_interface_vrf_update,
+	[ZEBRA_REDISTRIBUTE_ROUTE_ADD] = rip_zebra_read_route,
+	[ZEBRA_REDISTRIBUTE_ROUTE_DEL] = rip_zebra_read_route,
+};
+
+void rip_zclient_init(struct thread_master *master)
+{
+	/* Set default value to the zebra client structure. */
+	zclient = zclient_new(master, &zclient_options_default, rip_handlers,
+			      array_size(rip_handlers));
+	zclient_init(zclient, ZEBRA_ROUTE_RIP, 0, &ripd_privs);
+	zclient->zebra_connected = rip_zebra_connected;
+}
+
+void rip_zclient_stop(void)
+{
+	zclient_stop(zclient);
+	zclient_free(zclient);
+}