[mirror_frr.git] / staticd / static_zebra.c

/*
 * Zebra connect code.
 * Copyright (C) 2018 Cumulus Networks, Inc.
 *               Donald Sharp
 *
 * This program 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 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; 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 "thread.h"
#include "command.h"
#include "network.h"
#include "prefix.h"
#include "routemap.h"
#include "table.h"
#include "srcdest_table.h"
#include "stream.h"
#include "memory.h"
#include "zclient.h"
#include "filter.h"
#include "plist.h"
#include "log.h"
#include "nexthop.h"
#include "nexthop_group.h"
#include "hash.h"
#include "jhash.h"

#include "static_vrf.h"
#include "static_routes.h"
#include "static_zebra.h"
#include "static_nht.h"
#include "static_vty.h"

/* Zebra structure to hold current status. */
struct zclient *zclient;
static struct hash *static_nht_hash;

static struct interface *zebra_interface_if_lookup(struct stream *s)
{
	char ifname_tmp[INTERFACE_NAMSIZ];

	/* Read interface name. */
	stream_get(ifname_tmp, s, INTERFACE_NAMSIZ);

	/* And look it up. */
	return if_lookup_by_name(ifname_tmp, VRF_DEFAULT);
}

/* Inteface addition message from zebra. */
static int interface_add(int command, struct zclient *zclient,
			       zebra_size_t length, vrf_id_t vrf_id)
{
	struct interface *ifp;

	ifp = zebra_interface_add_read(zclient->ibuf, vrf_id);

	if (!ifp)
		return 0;

	static_ifindex_update(ifp, true);
	return 0;
}

static int interface_delete(int command, struct zclient *zclient,
			    zebra_size_t length, vrf_id_t vrf_id)
{
	struct interface *ifp;
	struct stream *s;

	s = zclient->ibuf;
	/* zebra_interface_state_read () updates interface structure in iflist
	 */
	ifp = zebra_interface_state_read(s, vrf_id);

	if (ifp == NULL)
		return 0;

	if_set_index(ifp, IFINDEX_INTERNAL);

	static_ifindex_update(ifp, false);
	return 0;
}

static int interface_address_add(int command, struct zclient *zclient,
				 zebra_size_t length, vrf_id_t vrf_id)
{
	zebra_interface_address_read(command, zclient->ibuf, vrf_id);

	return 0;
}

static int interface_address_delete(int command, struct zclient *zclient,
				    zebra_size_t length, vrf_id_t vrf_id)
{
	struct connected *c;

	c = zebra_interface_address_read(command, zclient->ibuf, vrf_id);

	if (!c)
		return 0;

	connected_free(c);
	return 0;
}

static int interface_state_up(int command, struct zclient *zclient,
			      zebra_size_t length, vrf_id_t vrf_id)
{
	struct interface *ifp;

	ifp = zebra_interface_if_lookup(zclient->ibuf);

	if (ifp && if_is_vrf(ifp)) {
		struct static_vrf *svrf = static_vrf_lookup_by_id(vrf_id);

		static_fixup_vrf_ids(svrf);
		static_config_install_delayed_routes(svrf);
	}

	return 0;
}

static int interface_state_down(int command, struct zclient *zclient,
				zebra_size_t length, vrf_id_t vrf_id)
{
	zebra_interface_state_read(zclient->ibuf, vrf_id);

	return 0;
}

static int route_notify_owner(int command, struct zclient *zclient,
			      zebra_size_t length, vrf_id_t vrf_id)
{
	struct prefix p;
	enum zapi_route_notify_owner note;
	uint32_t table_id;
	char buf[PREFIX_STRLEN];

	prefix2str(&p, buf, sizeof(buf));

	if (!zapi_route_notify_decode(zclient->ibuf, &p, &table_id, &note))
		return -1;

	switch (note) {
	case ZAPI_ROUTE_FAIL_INSTALL:
		zlog_warn("%s: Route %s failed to install for table: %u",
			  __PRETTY_FUNCTION__, buf, table_id);
		break;
	case ZAPI_ROUTE_BETTER_ADMIN_WON:
		zlog_warn("%s: Route %s over-ridden by better route for table: %u",
			  __PRETTY_FUNCTION__, buf, table_id);
		break;
	case ZAPI_ROUTE_INSTALLED:
		break;
	case ZAPI_ROUTE_REMOVED:
		break;
	case ZAPI_ROUTE_REMOVE_FAIL:
		zlog_warn("%s: Route %s failure to remove for table: %u",
			  __PRETTY_FUNCTION__, buf, table_id);
		break;
	}

	return 0;
}
static void zebra_connected(struct zclient *zclient)
{
	zclient_send_reg_requests(zclient, VRF_DEFAULT);
}

struct static_nht_data {
	struct prefix *nh;

	vrf_id_t nh_vrf_id;

	uint32_t refcount;
	uint8_t nh_num;
};

static int static_zebra_nexthop_update(int command, struct zclient *zclient,
				       zebra_size_t length, vrf_id_t vrf_id)
{
	struct static_nht_data *nhtd, lookup;
	struct zapi_route nhr;
	afi_t afi = AFI_IP;

	if (!zapi_nexthop_update_decode(zclient->ibuf, &nhr)) {
		zlog_warn("Failure to decode nexthop update message");
		return 1;
	}

	if (nhr.prefix.family == AF_INET6)
		afi = AFI_IP6;

	memset(&lookup, 0, sizeof(lookup));
	lookup.nh = &nhr.prefix;
	lookup.nh_vrf_id = vrf_id;

	nhtd = hash_lookup(static_nht_hash, &lookup);

	if (nhtd) {
		nhtd->nh_num = nhr.nexthop_num;

		static_nht_update(&nhr.prefix, nhr.nexthop_num, afi,
				  nhtd->nh_vrf_id);
	} else
		zlog_err("No nhtd?");

	return 1;
}

static void static_zebra_capabilities(struct zclient_capabilities *cap)
{
	mpls_enabled = cap->mpls_enabled;
}

static unsigned int static_nht_hash_key(void *data)
{
	struct static_nht_data *nhtd = data;
	unsigned int key = 0;

	key = prefix_hash_key(nhtd->nh);
	return jhash_1word(nhtd->nh_vrf_id, key);
}

static int static_nht_hash_cmp(const void *d1, const void *d2)
{
	const struct static_nht_data *nhtd1 = d1;
	const struct static_nht_data *nhtd2 = d2;

	if (nhtd1->nh_vrf_id != nhtd2->nh_vrf_id)
		return 0;

	return prefix_same(nhtd1->nh, nhtd2->nh);
}

static void *static_nht_hash_alloc(void *data)
{
	struct static_nht_data *copy = data;
	struct static_nht_data *new;

	new = XMALLOC(MTYPE_TMP, sizeof(*new));

	new->nh = prefix_new();
	prefix_copy(new->nh, copy->nh);
	new->refcount = 0;
	new->nh_num = 0;
	new->nh_vrf_id = copy->nh_vrf_id;

	return new;
}

static void static_nht_hash_free(void *data)
{
	struct static_nht_data *nhtd = data;

	prefix_free(nhtd->nh);
	XFREE(MTYPE_TMP, nhtd);
}

void static_zebra_nht_register(struct static_route *si, bool reg)
{
	struct static_nht_data *nhtd, lookup;
	uint32_t cmd;
	struct prefix p;
	afi_t afi = AFI_IP;

	cmd = (reg) ?
		ZEBRA_NEXTHOP_REGISTER : ZEBRA_NEXTHOP_UNREGISTER;

	if (si->nh_registered && reg)
		return;

	if (!si->nh_registered && !reg)
		return;

	memset(&p, 0, sizeof(p));
	switch (si->type) {
	case STATIC_IFNAME:
	case STATIC_BLACKHOLE:
		return;
	case STATIC_IPV4_GATEWAY:
	case STATIC_IPV4_GATEWAY_IFNAME:
		p.family = AF_INET;
		p.prefixlen = IPV4_MAX_BITLEN;
		p.u.prefix4 = si->addr.ipv4;
		afi = AFI_IP;
		break;
	case STATIC_IPV6_GATEWAY:
	case STATIC_IPV6_GATEWAY_IFNAME:
		p.family = AF_INET6;
		p.prefixlen = IPV6_MAX_BITLEN;
		p.u.prefix6 = si->addr.ipv6;
		afi = AFI_IP6;
		break;
	}

	memset(&lookup, 0, sizeof(lookup));
	lookup.nh = &p;
	lookup.nh_vrf_id = si->nh_vrf_id;

	si->nh_registered = reg;

	if (reg) {
		nhtd = hash_get(static_nht_hash, &lookup,
				static_nht_hash_alloc);
		nhtd->refcount++;

		if (nhtd->refcount > 1) {
			static_nht_update(nhtd->nh, nhtd->nh_num,
					  afi, si->nh_vrf_id);
			return;
		}
	} else {
		nhtd = hash_lookup(static_nht_hash, &lookup);
		if (!nhtd)
			return;

		nhtd->refcount--;
		if (nhtd->refcount >= 1)
			return;

		hash_release(static_nht_hash, nhtd);
		static_nht_hash_free(nhtd);
	}

	if (zclient_send_rnh(zclient, cmd, &p, false, si->nh_vrf_id) < 0)
		zlog_warn("%s: Failure to send nexthop to zebra",
			  __PRETTY_FUNCTION__);
}

extern void static_zebra_route_add(struct route_node *rn,
				   struct static_route *si_changed,
				   vrf_id_t vrf_id, safi_t safi, bool install)
{
	struct static_route *si = rn->info;
	const struct prefix *p, *src_pp;
	struct zapi_nexthop *api_nh;
	struct zapi_route api;
	uint32_t nh_num = 0;

	p = src_pp = NULL;
	srcdest_rnode_prefixes(rn, &p, &src_pp);

	memset(&api, 0, sizeof(api));
	api.vrf_id = vrf_id;
	api.type = ZEBRA_ROUTE_STATIC;
	api.safi = safi;
	memcpy(&api.prefix, p, sizeof(api.prefix));

	if (src_pp) {
		SET_FLAG(api.message, ZAPI_MESSAGE_SRCPFX);
		memcpy(&api.src_prefix, src_pp, sizeof(api.src_prefix));
	}
	SET_FLAG(api.flags, ZEBRA_FLAG_RR_USE_DISTANCE);
	SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
	if (si_changed->distance) {
		SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE);
		api.distance = si_changed->distance;
	}
	if (si_changed->tag) {
		SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
		api.tag = si_changed->tag;
	}
	if (si_changed->table_id != 0) {
		SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
		api.tableid = si_changed->table_id;
	}
	for (/*loaded above*/; si; si = si->next) {
		api_nh = &api.nexthops[nh_num];
		if (si->nh_vrf_id == VRF_UNKNOWN)
			continue;

		if (si->distance != si_changed->distance)
			continue;

		api_nh->vrf_id = si->nh_vrf_id;
		switch (si->type) {
		case STATIC_IFNAME:
			if (si->ifindex == IFINDEX_INTERNAL)
				continue;
			api_nh->ifindex = si->ifindex;
			api_nh->type = NEXTHOP_TYPE_IFINDEX;
			break;
		case STATIC_IPV4_GATEWAY:
			if (!si->nh_valid)
				continue;
			api_nh->type = NEXTHOP_TYPE_IPV4;
			api_nh->gate = si->addr;
			break;
		case STATIC_IPV4_GATEWAY_IFNAME:
			if (si->ifindex == IFINDEX_INTERNAL)
				continue;
			api_nh->ifindex = si->ifindex;
			api_nh->type = NEXTHOP_TYPE_IPV4_IFINDEX;
			api_nh->gate = si->addr;
			break;
		case STATIC_IPV6_GATEWAY:
			if (!si->nh_valid)
				continue;
			api_nh->type = NEXTHOP_TYPE_IPV6;
			api_nh->gate = si->addr;
			break;
		case STATIC_IPV6_GATEWAY_IFNAME:
			if (si->ifindex == IFINDEX_INTERNAL)
				continue;
			api_nh->type = NEXTHOP_TYPE_IPV6_IFINDEX;
			api_nh->ifindex = si->ifindex;
			api_nh->gate = si->addr;
			break;
		case STATIC_BLACKHOLE:
			api_nh->type = NEXTHOP_TYPE_BLACKHOLE;
			switch (si->bh_type) {
			case STATIC_BLACKHOLE_DROP:
			case STATIC_BLACKHOLE_NULL:
				api_nh->bh_type = BLACKHOLE_NULL;
				break;
			case STATIC_BLACKHOLE_REJECT:
				api_nh->bh_type = BLACKHOLE_REJECT;
			}
			break;
		}

		if (si->snh_label.num_labels) {
			int i;

			SET_FLAG(api.message, ZAPI_MESSAGE_LABEL);
			api_nh->label_num = si->snh_label.num_labels;
			for (i = 0; i < api_nh->label_num; i++)
				api_nh->labels[i] = si->snh_label.label[i];
		}
		nh_num++;
	}

	api.nexthop_num = nh_num;

	/*
	 * If we have been given an install but nothing is valid
	 * go ahead and delete the route for double plus fun
	 */
	if (!nh_num && install)
		install = false;

	zclient_route_send(install ?
			   ZEBRA_ROUTE_ADD : ZEBRA_ROUTE_DELETE,
			   zclient, &api);
}
void static_zebra_init(void)
{
	struct zclient_options opt = { .receive_notify = true };

	zclient = zclient_new_notify(master, &opt);

	zclient_init(zclient, ZEBRA_ROUTE_STATIC, 0, &static_privs);
	zclient->zebra_capabilities = static_zebra_capabilities;
	zclient->zebra_connected = zebra_connected;
	zclient->interface_add = interface_add;
	zclient->interface_delete = interface_delete;
	zclient->interface_up = interface_state_up;
	zclient->interface_down = interface_state_down;
	zclient->interface_address_add = interface_address_add;
	zclient->interface_address_delete = interface_address_delete;
	zclient->route_notify_owner = route_notify_owner;
	zclient->nexthop_update = static_zebra_nexthop_update;

	static_nht_hash = hash_create(static_nht_hash_key,
				      static_nht_hash_cmp,
				      "Static Nexthop Tracking hash");
}
Commit	Line	Data
7e24fdf3 DS	1	/*
	2	* Zebra connect code.
	3	* Copyright (C) 2018 Cumulus Networks, Inc.
	4	* Donald Sharp
	5	*
8d5cbee9 DS	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the Free
	8	* Software Foundation; either version 2 of the License, or (at your option)
	9	* any later version.
7e24fdf3	10	*
8d5cbee9 DS	11	* This program is distributed in the hope that it will be useful, but WITHOUT
	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	14	* more details.
7e24fdf3 DS	15	*
	16	* You should have received a copy of the GNU General Public License along
	17	* with this program; see the file COPYING; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20	#include <zebra.h>
	21
	22	#include "thread.h"
	23	#include "command.h"
	24	#include "network.h"
	25	#include "prefix.h"
	26	#include "routemap.h"
	27	#include "table.h"
	28	#include "srcdest_table.h"
	29	#include "stream.h"
	30	#include "memory.h"
	31	#include "zclient.h"
	32	#include "filter.h"
	33	#include "plist.h"
	34	#include "log.h"
	35	#include "nexthop.h"
	36	#include "nexthop_group.h"
74f0a94e	37	#include "hash.h"
31e2232b	38	#include "jhash.h"
7e24fdf3 DS	39
	40	#include "static_vrf.h"
	41	#include "static_routes.h"
	42	#include "static_zebra.h"
	43	#include "static_nht.h"
	44	#include "static_vty.h"
	45
	46	/* Zebra structure to hold current status. */
	47	struct zclient *zclient;
74f0a94e	48	static struct hash *static_nht_hash;
7e24fdf3 DS	49
	50	static struct interface zebra_interface_if_lookup(struct stream s)
	51	{
	52	char ifname_tmp[INTERFACE_NAMSIZ];
	53
	54	/* Read interface name. */
	55	stream_get(ifname_tmp, s, INTERFACE_NAMSIZ);
	56
	57	/* And look it up. */
	58	return if_lookup_by_name(ifname_tmp, VRF_DEFAULT);
	59	}
	60
	61	/* Inteface addition message from zebra. */
	62	static int interface_add(int command, struct zclient *zclient,
	63	zebra_size_t length, vrf_id_t vrf_id)
	64	{
	65	struct interface *ifp;
	66
	67	ifp = zebra_interface_add_read(zclient->ibuf, vrf_id);
	68
	69	if (!ifp)
	70	return 0;
	71
	72	static_ifindex_update(ifp, true);
	73	return 0;
	74	}
	75
	76	static int interface_delete(int command, struct zclient *zclient,
	77	zebra_size_t length, vrf_id_t vrf_id)
	78	{
	79	struct interface *ifp;
	80	struct stream *s;
	81
	82	s = zclient->ibuf;
	83	/* zebra_interface_state_read () updates interface structure in iflist
	84	*/
	85	ifp = zebra_interface_state_read(s, vrf_id);
	86
	87	if (ifp == NULL)
	88	return 0;
	89
	90	if_set_index(ifp, IFINDEX_INTERNAL);
	91
	92	static_ifindex_update(ifp, false);
	93	return 0;
	94	}
	95
	96	static int interface_address_add(int command, struct zclient *zclient,
	97	zebra_size_t length, vrf_id_t vrf_id)
	98	{
	99	zebra_interface_address_read(command, zclient->ibuf, vrf_id);
	100
	101	return 0;
	102	}
	103
	104	static int interface_address_delete(int command, struct zclient *zclient,
	105	zebra_size_t length, vrf_id_t vrf_id)
	106	{
	107	struct connected *c;
	108
	109	c = zebra_interface_address_read(command, zclient->ibuf, vrf_id);
	110
	111	if (!c)
	112	return 0;
113
114	connected_free(c);
115	return 0;
116	}
117
118	static int interface_state_up(int command, struct zclient *zclient,
119	zebra_size_t length, vrf_id_t vrf_id)
120	{
121	struct interface *ifp;
122
123	ifp = zebra_interface_if_lookup(zclient->ibuf);
124
bacd8eea	125	if (ifp && if_is_vrf(ifp)) {
7e24fdf3 DS	126	struct static_vrf *svrf = static_vrf_lookup_by_id(vrf_id);
	127
	128	static_fixup_vrf_ids(svrf);
	129	static_config_install_delayed_routes(svrf);
	130	}
	131
	132	return 0;
	133	}
	134
	135	static int interface_state_down(int command, struct zclient *zclient,
	136	zebra_size_t length, vrf_id_t vrf_id)
	137	{
	138	zebra_interface_state_read(zclient->ibuf, vrf_id);
	139
	140	return 0;
	141	}
	142
	143	static int route_notify_owner(int command, struct zclient *zclient,
	144	zebra_size_t length, vrf_id_t vrf_id)
	145	{
	146	struct prefix p;
	147	enum zapi_route_notify_owner note;
	148	uint32_t table_id;
	149	char buf[PREFIX_STRLEN];
	150
	151	prefix2str(&p, buf, sizeof(buf));
	152
	153	if (!zapi_route_notify_decode(zclient->ibuf, &p, &table_id, &note))
	154	return -1;
	155
	156	switch (note) {
	157	case ZAPI_ROUTE_FAIL_INSTALL:
	158	zlog_warn("%s: Route %s failed to install for table: %u",
	159	__PRETTY_FUNCTION__, buf, table_id);
	160	break;
	161	case ZAPI_ROUTE_BETTER_ADMIN_WON:
	162	zlog_warn("%s: Route %s over-ridden by better route for table: %u",
	163	__PRETTY_FUNCTION__, buf, table_id);
	164	break;
	165	case ZAPI_ROUTE_INSTALLED:
	166	break;
	167	case ZAPI_ROUTE_REMOVED:
	168	break;
	169	case ZAPI_ROUTE_REMOVE_FAIL:
	170	zlog_warn("%s: Route %s failure to remove for table: %u",
	171	__PRETTY_FUNCTION__, buf, table_id);
	172	break;
	173	}
	174
	175	return 0;
	176	}
	177	static void zebra_connected(struct zclient *zclient)
	178	{
	179	zclient_send_reg_requests(zclient, VRF_DEFAULT);
	180	}
	181
74f0a94e DS	182	struct static_nht_data {
74f0a94e DS	183	struct prefix *nh;
31e2232b DS	184
	185	vrf_id_t nh_vrf_id;
	186
74f0a94e DS	187	uint32_t refcount;
	188	uint8_t nh_num;
	189	};
7e24fdf3 DS	190
	191	static int static_zebra_nexthop_update(int command, struct zclient *zclient,
	192	zebra_size_t length, vrf_id_t vrf_id)
	193	{
74f0a94e	194	struct static_nht_data *nhtd, lookup;
7e24fdf3 DS	195	struct zapi_route nhr;
	196	afi_t afi = AFI_IP;
	197
	198	if (!zapi_nexthop_update_decode(zclient->ibuf, &nhr)) {
	199	zlog_warn("Failure to decode nexthop update message");
	200	return 1;
	201	}
	202
	203	if (nhr.prefix.family == AF_INET6)
	204	afi = AFI_IP6;
	205
74f0a94e DS	206	memset(&lookup, 0, sizeof(lookup));
74f0a94e DS	207	lookup.nh = &nhr.prefix;
31e2232b	208	lookup.nh_vrf_id = vrf_id;
74f0a94e DS	209
74f0a94e DS	210	nhtd = hash_lookup(static_nht_hash, &lookup);
31e2232b DS	211
31e2232b DS	212	if (nhtd) {
74f0a94e DS	213	nhtd->nh_num = nhr.nexthop_num;
74f0a94e DS	214
31e2232b DS	215	static_nht_update(&nhr.prefix, nhr.nexthop_num, afi,
	216	nhtd->nh_vrf_id);
	217	} else
	218	zlog_err("No nhtd?");
74f0a94e	219
7e24fdf3 DS	220	return 1;
	221	}
	222
	223	static void static_zebra_capabilities(struct zclient_capabilities *cap)
	224	{
	225	mpls_enabled = cap->mpls_enabled;
	226	}
	227
74f0a94e DS	228	static unsigned int static_nht_hash_key(void *data)
	229	{
	230	struct static_nht_data *nhtd = data;
31e2232b	231	unsigned int key = 0;
74f0a94e	232
31e2232b DS	233	key = prefix_hash_key(nhtd->nh);
31e2232b DS	234	return jhash_1word(nhtd->nh_vrf_id, key);
74f0a94e DS	235	}
	236
	237	static int static_nht_hash_cmp(const void d1, const void d2)
	238	{
	239	const struct static_nht_data *nhtd1 = d1;
	240	const struct static_nht_data *nhtd2 = d2;
	241
31e2232b DS	242	if (nhtd1->nh_vrf_id != nhtd2->nh_vrf_id)
	243	return 0;
	244
74f0a94e DS	245	return prefix_same(nhtd1->nh, nhtd2->nh);
	246	}
	247
	248	static void static_nht_hash_alloc(void data)
	249	{
	250	struct static_nht_data *copy = data;
	251	struct static_nht_data *new;
	252
	253	new = XMALLOC(MTYPE_TMP, sizeof(*new));
	254
	255	new->nh = prefix_new();
	256	prefix_copy(new->nh, copy->nh);
	257	new->refcount = 0;
	258	new->nh_num = 0;
31e2232b	259	new->nh_vrf_id = copy->nh_vrf_id;
74f0a94e DS	260
	261	return new;
	262	}
	263
	264	static void static_nht_hash_free(void *data)
	265	{
	266	struct static_nht_data *nhtd = data;
	267
	268	prefix_free(nhtd->nh);
	269	XFREE(MTYPE_TMP, nhtd);
	270	}
	271
7e24fdf3 DS	272	void static_zebra_nht_register(struct static_route *si, bool reg)
7e24fdf3 DS	273	{
74f0a94e	274	struct static_nht_data *nhtd, lookup;
7e24fdf3 DS	275	uint32_t cmd;
7e24fdf3 DS	276	struct prefix p;
74f0a94e	277	afi_t afi = AFI_IP;
7e24fdf3 DS	278
	279	cmd = (reg) ?
	280	ZEBRA_NEXTHOP_REGISTER : ZEBRA_NEXTHOP_UNREGISTER;
	281
	282	if (si->nh_registered && reg)
	283	return;
	284
	285	if (!si->nh_registered && !reg)
	286	return;
	287
	288	memset(&p, 0, sizeof(p));
	289	switch (si->type) {
7e24fdf3 DS	290	case STATIC_IFNAME:
7e24fdf3 DS	291	case STATIC_BLACKHOLE:
7e24fdf3 DS	292	return;
7e24fdf3 DS	293	case STATIC_IPV4_GATEWAY:
88a90016	294	case STATIC_IPV4_GATEWAY_IFNAME:
7e24fdf3 DS	295	p.family = AF_INET;
	296	p.prefixlen = IPV4_MAX_BITLEN;
	297	p.u.prefix4 = si->addr.ipv4;
74f0a94e	298	afi = AFI_IP;
7e24fdf3 DS	299	break;
7e24fdf3 DS	300	case STATIC_IPV6_GATEWAY:
88a90016	301	case STATIC_IPV6_GATEWAY_IFNAME:
7e24fdf3 DS	302	p.family = AF_INET6;
	303	p.prefixlen = IPV6_MAX_BITLEN;
	304	p.u.prefix6 = si->addr.ipv6;
74f0a94e	305	afi = AFI_IP6;
7e24fdf3 DS	306	break;
	307	}
	308
74f0a94e DS	309	memset(&lookup, 0, sizeof(lookup));
74f0a94e DS	310	lookup.nh = &p;
31e2232b	311	lookup.nh_vrf_id = si->nh_vrf_id;
74f0a94e DS	312
	313	si->nh_registered = reg;
	314
	315	if (reg) {
	316	nhtd = hash_get(static_nht_hash, &lookup,
	317	static_nht_hash_alloc);
	318	nhtd->refcount++;
	319
	320	if (nhtd->refcount > 1) {
	321	static_nht_update(nhtd->nh, nhtd->nh_num,
	322	afi, si->nh_vrf_id);
	323	return;
	324	}
	325	} else {
	326	nhtd = hash_lookup(static_nht_hash, &lookup);
	327	if (!nhtd)
	328	return;
	329
	330	nhtd->refcount--;
	331	if (nhtd->refcount >= 1)
	332	return;
	333
	334	hash_release(static_nht_hash, nhtd);
	335	static_nht_hash_free(nhtd);
	336	}
	337
7e24fdf3 DS	338	if (zclient_send_rnh(zclient, cmd, &p, false, si->nh_vrf_id) < 0)
	339	zlog_warn("%s: Failure to send nexthop to zebra",
	340	__PRETTY_FUNCTION__);
7e24fdf3 DS	341	}
7e24fdf3 DS	342
8bc8de2c DS	343	extern void static_zebra_route_add(struct route_node *rn,
	344	struct static_route *si_changed,
	345	vrf_id_t vrf_id, safi_t safi, bool install)
7e24fdf3 DS	346	{
	347	struct static_route *si = rn->info;
	348	const struct prefix p, src_pp;
	349	struct zapi_nexthop *api_nh;
	350	struct zapi_route api;
	351	uint32_t nh_num = 0;
	352
	353	p = src_pp = NULL;
	354	srcdest_rnode_prefixes(rn, &p, &src_pp);
	355
	356	memset(&api, 0, sizeof(api));
	357	api.vrf_id = vrf_id;
	358	api.type = ZEBRA_ROUTE_STATIC;
	359	api.safi = safi;
	360	memcpy(&api.prefix, p, sizeof(api.prefix));
	361
	362	if (src_pp) {
	363	SET_FLAG(api.message, ZAPI_MESSAGE_SRCPFX);
	364	memcpy(&api.src_prefix, src_pp, sizeof(api.src_prefix));
	365	}
8bc8de2c	366	SET_FLAG(api.flags, ZEBRA_FLAG_RR_USE_DISTANCE);
7e24fdf3	367	SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
8bc8de2c DS	368	if (si_changed->distance) {
	369	SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE);
	370	api.distance = si_changed->distance;
	371	}
	372	if (si_changed->tag) {
	373	SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
	374	api.tag = si_changed->tag;
	375	}
31d4a8e5 PG	376	if (si_changed->table_id != 0) {
	377	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
	378	api.tableid = si_changed->table_id;
	379	}
7e24fdf3 DS	380	for (/loaded above/; si; si = si->next) {
	381	api_nh = &api.nexthops[nh_num];
	382	if (si->nh_vrf_id == VRF_UNKNOWN)
	383	continue;
	384
8bc8de2c DS	385	if (si->distance != si_changed->distance)
8bc8de2c DS	386	continue;
7e24fdf3 DS	387
	388	api_nh->vrf_id = si->nh_vrf_id;
	389	switch (si->type) {
	390	case STATIC_IFNAME:
	391	if (si->ifindex == IFINDEX_INTERNAL)
	392	continue;
	393	api_nh->ifindex = si->ifindex;
	394	api_nh->type = NEXTHOP_TYPE_IFINDEX;
	395	break;
	396	case STATIC_IPV4_GATEWAY:
	397	if (!si->nh_valid)
	398	continue;
	399	api_nh->type = NEXTHOP_TYPE_IPV4;
	400	api_nh->gate = si->addr;
	401	break;
	402	case STATIC_IPV4_GATEWAY_IFNAME:
	403	if (si->ifindex == IFINDEX_INTERNAL)
	404	continue;
	405	api_nh->ifindex = si->ifindex;
	406	api_nh->type = NEXTHOP_TYPE_IPV4_IFINDEX;
	407	api_nh->gate = si->addr;
	408	break;
	409	case STATIC_IPV6_GATEWAY:
	410	if (!si->nh_valid)
	411	continue;
	412	api_nh->type = NEXTHOP_TYPE_IPV6;
	413	api_nh->gate = si->addr;
	414	break;
	415	case STATIC_IPV6_GATEWAY_IFNAME:
	416	if (si->ifindex == IFINDEX_INTERNAL)
	417	continue;
	418	api_nh->type = NEXTHOP_TYPE_IPV6_IFINDEX;
	419	api_nh->ifindex = si->ifindex;
	420	api_nh->gate = si->addr;
	421	break;
	422	case STATIC_BLACKHOLE:
	423	api_nh->type = NEXTHOP_TYPE_BLACKHOLE;
	424	switch (si->bh_type) {
	425	case STATIC_BLACKHOLE_DROP:
	426	case STATIC_BLACKHOLE_NULL:
	427	api_nh->bh_type = BLACKHOLE_NULL;
	428	break;
	429	case STATIC_BLACKHOLE_REJECT:
	430	api_nh->bh_type = BLACKHOLE_REJECT;
	431	}
	432	break;
	433	}
	434
	435	if (si->snh_label.num_labels) {
	436	int i;
	437
	438	SET_FLAG(api.message, ZAPI_MESSAGE_LABEL);
	439	api_nh->label_num = si->snh_label.num_labels;
	440	for (i = 0; i < api_nh->label_num; i++)
	441	api_nh->labels[i] = si->snh_label.label[i];
	442	}
	443	nh_num++;
	444	}
	445
	446	api.nexthop_num = nh_num;
	447
	448	/*
	449	* If we have been given an install but nothing is valid
	450	* go ahead and delete the route for double plus fun
451	*/
452	if (!nh_num && install)
453	install = false;
454
455	zclient_route_send(install ?
456	ZEBRA_ROUTE_ADD : ZEBRA_ROUTE_DELETE,
457	zclient, &api);
458	}
459	void static_zebra_init(void)
460	{
461	struct zclient_options opt = { .receive_notify = true };
462
463	zclient = zclient_new_notify(master, &opt);
464
465	zclient_init(zclient, ZEBRA_ROUTE_STATIC, 0, &static_privs);
466	zclient->zebra_capabilities = static_zebra_capabilities;
467	zclient->zebra_connected = zebra_connected;
468	zclient->interface_add = interface_add;
469	zclient->interface_delete = interface_delete;
470	zclient->interface_up = interface_state_up;
471	zclient->interface_down = interface_state_down;
472	zclient->interface_address_add = interface_address_add;
473	zclient->interface_address_delete = interface_address_delete;
474	zclient->route_notify_owner = route_notify_owner;
475	zclient->nexthop_update = static_zebra_nexthop_update;
74f0a94e DS	476
	477	static_nht_hash = hash_create(static_nht_hash_key,
	478	static_nht_hash_cmp,
	479	"Static Nexthop Tracking hash");
7e24fdf3	480	}