[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(ZAPI_CALLBACK_ARGS)
{
	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(ZAPI_CALLBACK_ARGS)
{
	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(ZAPI_CALLBACK_ARGS)
{
	zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);

	return 0;
}

static int interface_address_delete(ZAPI_CALLBACK_ARGS)
{
	struct connected *c;

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

	if (!c)
		return 0;

	connected_free(c);
	return 0;
}

static int interface_state_up(ZAPI_CALLBACK_ARGS)
{
	struct interface *ifp;

	ifp = zebra_interface_if_lookup(zclient->ibuf);

	if (ifp) {
		if (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);
		}

		/* Install any static reliant on this interface coming up */
		static_install_intf_nh(ifp);
	}

	return 0;
}

static int interface_state_down(ZAPI_CALLBACK_ARGS)
{
	zebra_interface_state_read(zclient->ibuf, vrf_id);

	return 0;
}

static int route_notify_owner(ZAPI_CALLBACK_ARGS)
{
	struct prefix p;
	enum zapi_route_notify_owner note;
	uint32_t table_id;
	char buf[PREFIX_STRLEN];

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

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

	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(ZAPI_CALLBACK_ARGS)
{
	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 bool 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 false;

	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;

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

		api_nh->vrf_id = si->nh_vrf_id;
		api_nh->onlink = si->onlink;

		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(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"
f591b309	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. */
121f9dee	62	static int interface_add(ZAPI_CALLBACK_ARGS)
7e24fdf3 DS	63	{
	64	struct interface *ifp;
	65
	66	ifp = zebra_interface_add_read(zclient->ibuf, vrf_id);
	67
	68	if (!ifp)
	69	return 0;
	70
	71	static_ifindex_update(ifp, true);
	72	return 0;
	73	}
	74
121f9dee	75	static int interface_delete(ZAPI_CALLBACK_ARGS)
7e24fdf3 DS	76	{
	77	struct interface *ifp;
	78	struct stream *s;
	79
	80	s = zclient->ibuf;
	81	/* zebra_interface_state_read () updates interface structure in iflist
	82	*/
	83	ifp = zebra_interface_state_read(s, vrf_id);
	84
	85	if (ifp == NULL)
	86	return 0;
	87
	88	if_set_index(ifp, IFINDEX_INTERNAL);
	89
	90	static_ifindex_update(ifp, false);
	91	return 0;
	92	}
	93
121f9dee	94	static int interface_address_add(ZAPI_CALLBACK_ARGS)
7e24fdf3	95	{
121f9dee	96	zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
7e24fdf3 DS	97
	98	return 0;
	99	}
	100
121f9dee	101	static int interface_address_delete(ZAPI_CALLBACK_ARGS)
7e24fdf3 DS	102	{
	103	struct connected *c;
	104
121f9dee	105	c = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
7e24fdf3 DS	106
	107	if (!c)
	108	return 0;
	109
	110	connected_free(c);
	111	return 0;
	112	}
	113
121f9dee	114	static int interface_state_up(ZAPI_CALLBACK_ARGS)
7e24fdf3 DS	115	{
	116	struct interface *ifp;
	117
	118	ifp = zebra_interface_if_lookup(zclient->ibuf);
	119
a9be49bc DS	120	if (ifp) {
	121	if (if_is_vrf(ifp)) {
	122	struct static_vrf *svrf =
	123	static_vrf_lookup_by_id(vrf_id);
7e24fdf3	124
a9be49bc DS	125	static_fixup_vrf_ids(svrf);
	126	static_config_install_delayed_routes(svrf);
	127	}
	128
	129	/* Install any static reliant on this interface coming up */
	130	static_install_intf_nh(ifp);
7e24fdf3 DS	131	}
	132
	133	return 0;
	134	}
	135
121f9dee	136	static int interface_state_down(ZAPI_CALLBACK_ARGS)
7e24fdf3 DS	137	{
	138	zebra_interface_state_read(zclient->ibuf, vrf_id);
	139
	140	return 0;
	141	}
	142
121f9dee	143	static int route_notify_owner(ZAPI_CALLBACK_ARGS)
7e24fdf3 DS	144	{
	145	struct prefix p;
	146	enum zapi_route_notify_owner note;
	147	uint32_t table_id;
	148	char buf[PREFIX_STRLEN];
	149
7e24fdf3 DS	150	if (!zapi_route_notify_decode(zclient->ibuf, &p, &table_id, &note))
	151	return -1;
	152
4a582888 DS	153	prefix2str(&p, buf, sizeof(buf));
4a582888 DS	154
7e24fdf3 DS	155	switch (note) {
	156	case ZAPI_ROUTE_FAIL_INSTALL:
	157	zlog_warn("%s: Route %s failed to install for table: %u",
	158	__PRETTY_FUNCTION__, buf, table_id);
	159	break;
	160	case ZAPI_ROUTE_BETTER_ADMIN_WON:
	161	zlog_warn("%s: Route %s over-ridden by better route for table: %u",
	162	__PRETTY_FUNCTION__, buf, table_id);
	163	break;
	164	case ZAPI_ROUTE_INSTALLED:
	165	break;
	166	case ZAPI_ROUTE_REMOVED:
	167	break;
	168	case ZAPI_ROUTE_REMOVE_FAIL:
	169	zlog_warn("%s: Route %s failure to remove for table: %u",
	170	__PRETTY_FUNCTION__, buf, table_id);
	171	break;
	172	}
	173
	174	return 0;
	175	}
	176	static void zebra_connected(struct zclient *zclient)
	177	{
	178	zclient_send_reg_requests(zclient, VRF_DEFAULT);
	179	}
	180
74f0a94e DS	181	struct static_nht_data {
74f0a94e DS	182	struct prefix *nh;
f591b309 DS	183
	184	vrf_id_t nh_vrf_id;
	185
74f0a94e DS	186	uint32_t refcount;
	187	uint8_t nh_num;
	188	};
7e24fdf3	189
121f9dee	190	static int static_zebra_nexthop_update(ZAPI_CALLBACK_ARGS)
7e24fdf3	191	{
74f0a94e	192	struct static_nht_data *nhtd, lookup;
7e24fdf3 DS	193	struct zapi_route nhr;
	194	afi_t afi = AFI_IP;
	195
	196	if (!zapi_nexthop_update_decode(zclient->ibuf, &nhr)) {
	197	zlog_warn("Failure to decode nexthop update message");
	198	return 1;
	199	}
	200
	201	if (nhr.prefix.family == AF_INET6)
	202	afi = AFI_IP6;
	203
74f0a94e DS	204	memset(&lookup, 0, sizeof(lookup));
74f0a94e DS	205	lookup.nh = &nhr.prefix;
f591b309	206	lookup.nh_vrf_id = vrf_id;
74f0a94e DS	207
74f0a94e DS	208	nhtd = hash_lookup(static_nht_hash, &lookup);
f591b309 DS	209
f591b309 DS	210	if (nhtd) {
74f0a94e DS	211	nhtd->nh_num = nhr.nexthop_num;
74f0a94e DS	212
f591b309 DS	213	static_nht_update(&nhr.prefix, nhr.nexthop_num, afi,
	214	nhtd->nh_vrf_id);
	215	} else
	216	zlog_err("No nhtd?");
74f0a94e	217
7e24fdf3 DS	218	return 1;
	219	}
	220
	221	static void static_zebra_capabilities(struct zclient_capabilities *cap)
	222	{
	223	mpls_enabled = cap->mpls_enabled;
	224	}
	225
74f0a94e DS	226	static unsigned int static_nht_hash_key(void *data)
	227	{
	228	struct static_nht_data *nhtd = data;
f591b309	229	unsigned int key = 0;
74f0a94e	230
f591b309 DS	231	key = prefix_hash_key(nhtd->nh);
f591b309 DS	232	return jhash_1word(nhtd->nh_vrf_id, key);
74f0a94e DS	233	}
74f0a94e DS	234
74df8d6d	235	static bool static_nht_hash_cmp(const void d1, const void d2)
74f0a94e DS	236	{
	237	const struct static_nht_data *nhtd1 = d1;
	238	const struct static_nht_data *nhtd2 = d2;
	239
f591b309	240	if (nhtd1->nh_vrf_id != nhtd2->nh_vrf_id)
74df8d6d	241	return false;
f591b309	242
74f0a94e DS	243	return prefix_same(nhtd1->nh, nhtd2->nh);
	244	}
	245
	246	static void static_nht_hash_alloc(void data)
	247	{
	248	struct static_nht_data *copy = data;
	249	struct static_nht_data *new;
	250
	251	new = XMALLOC(MTYPE_TMP, sizeof(*new));
	252
	253	new->nh = prefix_new();
	254	prefix_copy(new->nh, copy->nh);
	255	new->refcount = 0;
	256	new->nh_num = 0;
f591b309	257	new->nh_vrf_id = copy->nh_vrf_id;
74f0a94e DS	258
	259	return new;
	260	}
	261
	262	static void static_nht_hash_free(void *data)
	263	{
	264	struct static_nht_data *nhtd = data;
	265
	266	prefix_free(nhtd->nh);
	267	XFREE(MTYPE_TMP, nhtd);
	268	}
	269
7e24fdf3 DS	270	void static_zebra_nht_register(struct static_route *si, bool reg)
7e24fdf3 DS	271	{
74f0a94e	272	struct static_nht_data *nhtd, lookup;
7e24fdf3 DS	273	uint32_t cmd;
7e24fdf3 DS	274	struct prefix p;
74f0a94e	275	afi_t afi = AFI_IP;
7e24fdf3 DS	276
	277	cmd = (reg) ?
	278	ZEBRA_NEXTHOP_REGISTER : ZEBRA_NEXTHOP_UNREGISTER;
	279
	280	if (si->nh_registered && reg)
	281	return;
	282
	283	if (!si->nh_registered && !reg)
	284	return;
	285
	286	memset(&p, 0, sizeof(p));
	287	switch (si->type) {
7e24fdf3 DS	288	case STATIC_IFNAME:
7e24fdf3 DS	289	case STATIC_BLACKHOLE:
7e24fdf3 DS	290	return;
7e24fdf3 DS	291	case STATIC_IPV4_GATEWAY:
88a90016	292	case STATIC_IPV4_GATEWAY_IFNAME:
7e24fdf3 DS	293	p.family = AF_INET;
	294	p.prefixlen = IPV4_MAX_BITLEN;
	295	p.u.prefix4 = si->addr.ipv4;
74f0a94e	296	afi = AFI_IP;
7e24fdf3 DS	297	break;
7e24fdf3 DS	298	case STATIC_IPV6_GATEWAY:
88a90016	299	case STATIC_IPV6_GATEWAY_IFNAME:
7e24fdf3 DS	300	p.family = AF_INET6;
	301	p.prefixlen = IPV6_MAX_BITLEN;
	302	p.u.prefix6 = si->addr.ipv6;
74f0a94e	303	afi = AFI_IP6;
7e24fdf3 DS	304	break;
	305	}
	306
74f0a94e DS	307	memset(&lookup, 0, sizeof(lookup));
74f0a94e DS	308	lookup.nh = &p;
f591b309	309	lookup.nh_vrf_id = si->nh_vrf_id;
74f0a94e DS	310
	311	si->nh_registered = reg;
	312
	313	if (reg) {
	314	nhtd = hash_get(static_nht_hash, &lookup,
	315	static_nht_hash_alloc);
	316	nhtd->refcount++;
	317
	318	if (nhtd->refcount > 1) {
	319	static_nht_update(nhtd->nh, nhtd->nh_num,
	320	afi, si->nh_vrf_id);
	321	return;
	322	}
	323	} else {
	324	nhtd = hash_lookup(static_nht_hash, &lookup);
	325	if (!nhtd)
	326	return;
	327
	328	nhtd->refcount--;
	329	if (nhtd->refcount >= 1)
	330	return;
	331
	332	hash_release(static_nht_hash, nhtd);
	333	static_nht_hash_free(nhtd);
	334	}
	335
7e24fdf3 DS	336	if (zclient_send_rnh(zclient, cmd, &p, false, si->nh_vrf_id) < 0)
	337	zlog_warn("%s: Failure to send nexthop to zebra",
	338	__PRETTY_FUNCTION__);
7e24fdf3 DS	339	}
7e24fdf3 DS	340
8bc8de2c DS	341	extern void static_zebra_route_add(struct route_node *rn,
	342	struct static_route *si_changed,
	343	vrf_id_t vrf_id, safi_t safi, bool install)
7e24fdf3 DS	344	{
	345	struct static_route *si = rn->info;
	346	const struct prefix p, src_pp;
	347	struct zapi_nexthop *api_nh;
	348	struct zapi_route api;
	349	uint32_t nh_num = 0;
	350
	351	p = src_pp = NULL;
	352	srcdest_rnode_prefixes(rn, &p, &src_pp);
	353
	354	memset(&api, 0, sizeof(api));
	355	api.vrf_id = vrf_id;
	356	api.type = ZEBRA_ROUTE_STATIC;
	357	api.safi = safi;
	358	memcpy(&api.prefix, p, sizeof(api.prefix));
	359
	360	if (src_pp) {
	361	SET_FLAG(api.message, ZAPI_MESSAGE_SRCPFX);
	362	memcpy(&api.src_prefix, src_pp, sizeof(api.src_prefix));
	363	}
8bc8de2c	364	SET_FLAG(api.flags, ZEBRA_FLAG_RR_USE_DISTANCE);
7e24fdf3	365	SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
8bc8de2c DS	366	if (si_changed->distance) {
	367	SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE);
	368	api.distance = si_changed->distance;
	369	}
	370	if (si_changed->tag) {
	371	SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
	372	api.tag = si_changed->tag;
	373	}
31d4a8e5 PG	374	if (si_changed->table_id != 0) {
	375	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
	376	api.tableid = si_changed->table_id;
	377	}
7e24fdf3 DS	378	for (/loaded above/; si; si = si->next) {
	379	api_nh = &api.nexthops[nh_num];
	380	if (si->nh_vrf_id == VRF_UNKNOWN)
	381	continue;
	382
8bc8de2c DS	383	if (si->distance != si_changed->distance)
8bc8de2c DS	384	continue;
7e24fdf3	385
95cdbe5d DS	386	if (si->table_id != si_changed->table_id)
	387	continue;
	388
7e24fdf3	389	api_nh->vrf_id = si->nh_vrf_id;
fe85601c DS	390	api_nh->onlink = si->onlink;
fe85601c DS	391
7e24fdf3 DS	392	switch (si->type) {
	393	case STATIC_IFNAME:
	394	if (si->ifindex == IFINDEX_INTERNAL)
	395	continue;
	396	api_nh->ifindex = si->ifindex;
	397	api_nh->type = NEXTHOP_TYPE_IFINDEX;
	398	break;
	399	case STATIC_IPV4_GATEWAY:
	400	if (!si->nh_valid)
	401	continue;
	402	api_nh->type = NEXTHOP_TYPE_IPV4;
	403	api_nh->gate = si->addr;
	404	break;
	405	case STATIC_IPV4_GATEWAY_IFNAME:
	406	if (si->ifindex == IFINDEX_INTERNAL)
	407	continue;
	408	api_nh->ifindex = si->ifindex;
	409	api_nh->type = NEXTHOP_TYPE_IPV4_IFINDEX;
	410	api_nh->gate = si->addr;
	411	break;
	412	case STATIC_IPV6_GATEWAY:
	413	if (!si->nh_valid)
	414	continue;
	415	api_nh->type = NEXTHOP_TYPE_IPV6;
	416	api_nh->gate = si->addr;
	417	break;
	418	case STATIC_IPV6_GATEWAY_IFNAME:
	419	if (si->ifindex == IFINDEX_INTERNAL)
	420	continue;
	421	api_nh->type = NEXTHOP_TYPE_IPV6_IFINDEX;
	422	api_nh->ifindex = si->ifindex;
	423	api_nh->gate = si->addr;
	424	break;
	425	case STATIC_BLACKHOLE:
	426	api_nh->type = NEXTHOP_TYPE_BLACKHOLE;
	427	switch (si->bh_type) {
	428	case STATIC_BLACKHOLE_DROP:
	429	case STATIC_BLACKHOLE_NULL:
	430	api_nh->bh_type = BLACKHOLE_NULL;
	431	break;
	432	case STATIC_BLACKHOLE_REJECT:
	433	api_nh->bh_type = BLACKHOLE_REJECT;
	434	}
	435	break;
	436	}
	437
	438	if (si->snh_label.num_labels) {
	439	int i;
	440
	441	SET_FLAG(api.message, ZAPI_MESSAGE_LABEL);
	442	api_nh->label_num = si->snh_label.num_labels;
	443	for (i = 0; i < api_nh->label_num; i++)
	444	api_nh->labels[i] = si->snh_label.label[i];
	445	}
	446	nh_num++;
	447	}
	448
	449	api.nexthop_num = nh_num;
	450
	451	/*
	452	* If we have been given an install but nothing is valid
	453	* go ahead and delete the route for double plus fun
	454	*/
	455	if (!nh_num && install)
456	install = false;
457
458	zclient_route_send(install ?
459	ZEBRA_ROUTE_ADD : ZEBRA_ROUTE_DELETE,
460	zclient, &api);
461	}
462	void static_zebra_init(void)
463	{
464	struct zclient_options opt = { .receive_notify = true };
465
26f63a1e	466	zclient = zclient_new(master, &opt);
7e24fdf3 DS	467
	468	zclient_init(zclient, ZEBRA_ROUTE_STATIC, 0, &static_privs);
	469	zclient->zebra_capabilities = static_zebra_capabilities;
	470	zclient->zebra_connected = zebra_connected;
	471	zclient->interface_add = interface_add;
	472	zclient->interface_delete = interface_delete;
	473	zclient->interface_up = interface_state_up;
	474	zclient->interface_down = interface_state_down;
	475	zclient->interface_address_add = interface_address_add;
	476	zclient->interface_address_delete = interface_address_delete;
	477	zclient->route_notify_owner = route_notify_owner;
	478	zclient->nexthop_update = static_zebra_nexthop_update;
74f0a94e DS	479
	480	static_nht_hash = hash_create(static_nht_hash_key,
	481	static_nht_hash_cmp,
	482	"Static Nexthop Tracking hash");
7e24fdf3	483	}