[mirror_frr.git] / pbrd / pbr_zebra.c

/*
 * Zebra connect code.
 * Copyright (C) 2018 Cumulus Networks, Inc.
 *               Donald Sharp
 *
 * FRR 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.
 *
 * FRR 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 "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 "pbr_nht.h"
#include "pbr_map.h"
#include "pbr_memory.h"
#include "pbr_zebra.h"
#include "pbr_debug.h"

DEFINE_MTYPE_STATIC(PBRD, PBR_INTERFACE, "PBR Interface")

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

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);
}

struct pbr_interface *pbr_if_new(struct interface *ifp)
{
	struct pbr_interface *pbr_ifp;

	zassert(ifp);
	zassert(!ifp->info);

	pbr_ifp = XCALLOC(MTYPE_PBR_INTERFACE, sizeof(*pbr_ifp));

	if (!pbr_ifp) {
		zlog_err("%s: PBR XCALLOC(%zu) failure", __PRETTY_FUNCTION__,
			 sizeof(*pbr_ifp));
		return 0;
	}

	return (pbr_ifp);
}

/* 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;

	if (!ifp->info) {
		struct pbr_interface *pbr_ifp;

		pbr_ifp = pbr_if_new(ifp);
		ifp->info = pbr_ifp;
	}

	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);

	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)
{

	zebra_interface_if_lookup(zclient->ibuf);

	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:
		DEBUGD(&pbr_dbg_zebra,
		       "%s: [%s] Route install failure for table: %u",
		       __PRETTY_FUNCTION__, buf, table_id);
		break;
	case ZAPI_ROUTE_BETTER_ADMIN_WON:
		DEBUGD(&pbr_dbg_zebra,
		       "%s: [%s] Route better admin distance won for table: %u",
		       __PRETTY_FUNCTION__, buf, table_id);
		break;
	case ZAPI_ROUTE_INSTALLED:
		DEBUGD(&pbr_dbg_zebra,
		       "%s: [%s] Route installed succeeded for table: %u",
		       __PRETTY_FUNCTION__, buf, table_id);
		pbr_nht_route_installed_for_table(table_id);
		break;
	case ZAPI_ROUTE_REMOVED:
		DEBUGD(&pbr_dbg_zebra,
		       "%s: [%s] Route Removed succeeded for table: %u",
		       __PRETTY_FUNCTION__, buf, table_id);
		pbr_nht_route_removed_for_table(table_id);
		break;
	case ZAPI_ROUTE_REMOVE_FAIL:
		DEBUGD(&pbr_dbg_zebra,
		       "%s: [%s] Route remove fail for table: %u",
		       __PRETTY_FUNCTION__, buf, table_id);
		break;
	}

	return 0;
}

static int rule_notify_owner(int command, struct zclient *zclient,
			     zebra_size_t length, vrf_id_t vrf_id)
{
	uint32_t seqno, priority, unique;
	enum zapi_rule_notify_owner note;
	struct pbr_map_sequence *pbrms;
	struct pbr_map_interface *pmi;
	ifindex_t ifi;
	uint64_t installed;

	if (!zapi_rule_notify_decode(zclient->ibuf, &seqno, &priority, &unique,
				     &ifi, &note))
		return -1;

	pmi = NULL;
	pbrms = pbrms_lookup_unique(unique, ifi, &pmi);
	if (!pbrms) {
		DEBUGD(&pbr_dbg_zebra,
		       "%s: Failure to lookup pbrms based upon %u",
		       __PRETTY_FUNCTION__, unique);
		return 0;
	}

	installed = 1 << pmi->install_bit;

	switch (note) {
	case ZAPI_RULE_FAIL_INSTALL:
		DEBUGD(&pbr_dbg_zebra, "%s: Recieved RULE_FAIL_INSTALL",
		       __PRETTY_FUNCTION__);
		pbrms->installed &= ~installed;
		break;
	case ZAPI_RULE_INSTALLED:
		pbrms->installed |= installed;
		DEBUGD(&pbr_dbg_zebra, "%s: Recived RULE_INSTALLED",
		       __PRETTY_FUNCTION__);
		break;
	case ZAPI_RULE_REMOVED:
		DEBUGD(&pbr_dbg_zebra, "%s: Received RULE REMOVED",
		       __PRETTY_FUNCTION__);
		break;
	}

	return 0;
}

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

static void route_add_helper(struct zapi_route *api, struct nexthop_group nhg,
			     uint8_t install_afi)
{
	struct zapi_nexthop *api_nh;
	struct nexthop *nhop;
	int i;

	api->prefix.family = install_afi;

	i = 0;
	for (ALL_NEXTHOPS(nhg, nhop)) {
		api_nh = &api->nexthops[i];
		api_nh->vrf_id = nhop->vrf_id;
		api_nh->type = nhop->type;
		switch (nhop->type) {
		case NEXTHOP_TYPE_IPV4:
			api_nh->gate.ipv4 = nhop->gate.ipv4;
			break;
		case NEXTHOP_TYPE_IPV4_IFINDEX:
			api_nh->gate.ipv4 = nhop->gate.ipv4;
			api_nh->ifindex = nhop->ifindex;
			break;
		case NEXTHOP_TYPE_IFINDEX:
			api_nh->ifindex = nhop->ifindex;
			break;
		case NEXTHOP_TYPE_IPV6:
			memcpy(&api_nh->gate.ipv6, &nhop->gate.ipv6, 16);
			break;
		case NEXTHOP_TYPE_IPV6_IFINDEX:
			api_nh->ifindex = nhop->ifindex;
			memcpy(&api_nh->gate.ipv6, &nhop->gate.ipv6, 16);
			break;
		case NEXTHOP_TYPE_BLACKHOLE:
			api_nh->bh_type = nhop->bh_type;
			break;
		}
		i++;
	}
	api->nexthop_num = i;

	zclient_route_send(ZEBRA_ROUTE_ADD, zclient, api);
}

/*
 * This function assumes a default route is being
 * installed into the appropriate tableid
 */
void route_add(struct pbr_nexthop_group_cache *pnhgc, struct nexthop_group nhg,
	       afi_t install_afi)
{
	struct zapi_route api;

	memset(&api, 0, sizeof(api));

	api.vrf_id = VRF_DEFAULT;
	api.type = ZEBRA_ROUTE_PBR;
	api.safi = SAFI_UNICAST;
	/*
	 * Sending a default route
	 */
	api.tableid = pnhgc->table_id;
	SET_FLAG(api.flags, ZEBRA_FLAG_ALLOW_RECURSION);
	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
	SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
	switch (install_afi) {
	case AFI_MAX:
		route_add_helper(&api, nhg, AF_INET);
		route_add_helper(&api, nhg, AF_INET6);
		break;
	case AFI_IP:
		route_add_helper(&api, nhg, AF_INET);
		break;
	case AFI_IP6:
		route_add_helper(&api, nhg, AF_INET6);
		break;
	case AFI_L2VPN:
		DEBUGD(&pbr_dbg_zebra,
		       "%s: Asked to install unsupported route type: L2VPN",
		       __PRETTY_FUNCTION__);
		break;
	}
}

/*
 * This function assumes a default route is being
 * removed from the appropriate tableid
 */
void route_delete(struct pbr_nexthop_group_cache *pnhgc, afi_t afi)
{
	struct zapi_route api;

	memset(&api, 0, sizeof(api));
	api.vrf_id = VRF_DEFAULT;
	api.type = ZEBRA_ROUTE_PBR;
	api.safi = SAFI_UNICAST;

	api.tableid = pnhgc->table_id;
	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);

	switch (afi) {
	case AFI_IP:
		api.prefix.family = AF_INET;
		zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
		break;
	case AFI_IP6:
		api.prefix.family = AF_INET6;
		zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
		break;
	case AFI_MAX:
		api.prefix.family = AF_INET;
		zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
		api.prefix.family = AF_INET6;
		zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
		break;
	case AFI_L2VPN:
		DEBUGD(&pbr_dbg_zebra,
		       "%s: Asked to delete unsupported route type: L2VPN",
		       __PRETTY_FUNCTION__);
		break;
	}
}

static int pbr_zebra_nexthop_update(int command, struct zclient *zclient,
				    zebra_size_t length, vrf_id_t vrf_id)
{
	struct zapi_route nhr;
	char buf[PREFIX2STR_BUFFER];
	uint32_t i;

	zapi_nexthop_update_decode(zclient->ibuf, &nhr);

	if (DEBUG_MODE_CHECK(&pbr_dbg_zebra, DEBUG_MODE_ALL)) {

		DEBUGD(&pbr_dbg_zebra, "%s: Received Nexthop update: %s",
		       __PRETTY_FUNCTION__,
		       prefix2str(&nhr.prefix, buf, sizeof(buf)));

		DEBUGD(&pbr_dbg_zebra, "%s: (\tNexthops(%u)",
		       __PRETTY_FUNCTION__, nhr.nexthop_num);

		for (i = 0; i < nhr.nexthop_num; i++) {
			DEBUGD(&pbr_dbg_zebra,
			       "%s: \tType: %d: vrf: %d, ifindex: %d gate: %s",
			       __PRETTY_FUNCTION__, nhr.nexthops[i].type,
			       nhr.nexthops[i].vrf_id, nhr.nexthops[i].ifindex,
			       inet_ntoa(nhr.nexthops[i].gate.ipv4));
		}
	}

	pbr_nht_nexthop_update(&nhr);
	return 1;
}

extern struct zebra_privs_t pbr_privs;

void pbr_zebra_init(void)
{
	struct zclient_options opt = { .receive_notify = true };

	zclient = zclient_new_notify(master, &opt);

	zclient_init(zclient, ZEBRA_ROUTE_PBR, 0, &pbr_privs);
	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->rule_notify_owner = rule_notify_owner;
	zclient->nexthop_update = pbr_zebra_nexthop_update;
}

void pbr_send_rnh(struct nexthop *nhop, bool reg)
{
	uint32_t command;
	struct prefix p;

	command = (reg) ?
		ZEBRA_NEXTHOP_REGISTER : ZEBRA_NEXTHOP_UNREGISTER;

	memset(&p, 0, sizeof(p));
	switch (nhop->type) {
	case NEXTHOP_TYPE_IFINDEX:
	case NEXTHOP_TYPE_BLACKHOLE:
		return;
	case NEXTHOP_TYPE_IPV4:
	case NEXTHOP_TYPE_IPV4_IFINDEX:
		p.family = AF_INET;
		p.u.prefix4.s_addr = nhop->gate.ipv4.s_addr;
		p.prefixlen = 32;
		break;
	case NEXTHOP_TYPE_IPV6:
	case NEXTHOP_TYPE_IPV6_IFINDEX:
		p.family = AF_INET6;
		memcpy(&p.u.prefix6, &nhop->gate.ipv6, 16);
		p.prefixlen = 128;
		break;
	}

	if (zclient_send_rnh(zclient, command, &p,
			     false, nhop->vrf_id) < 0) {
		zlog_warn("%s: Failure to send nexthop to zebra",
			  __PRETTY_FUNCTION__);
	}
}

static void pbr_encode_pbr_map_sequence_prefix(struct stream *s,
					       struct prefix *p,
					       unsigned char  family)
{
	struct prefix any;

	if (!p) {
		memset(&any, 0, sizeof(any));
		any.family = family;
		p = &any;
	}

	stream_putc(s, p->family);
	stream_putc(s, p->prefixlen);
	stream_put(s, &p->u.prefix, prefix_blen(p));
}

static void pbr_encode_pbr_map_sequence(struct stream *s,
					struct pbr_map_sequence *pbrms,
					struct interface *ifp)
{
	unsigned char family;

	family = AF_INET;
	if (pbrms->family)
		family = pbrms->family;

	stream_putl(s, pbrms->seqno);
	stream_putl(s, pbrms->ruleno);
	stream_putl(s, pbrms->unique);
	pbr_encode_pbr_map_sequence_prefix(s, pbrms->src, family);
	stream_putw(s, 0);  /* src port */
	pbr_encode_pbr_map_sequence_prefix(s, pbrms->dst, family);
	stream_putw(s, 0);  /* dst port */
	if (pbrms->nhgrp_name)
		stream_putl(s, pbr_nht_get_table(pbrms->nhgrp_name));
	else if (pbrms->nhg)
		stream_putl(s, pbr_nht_get_table(pbrms->internal_nhg_name));
	stream_putl(s, ifp->ifindex);
}

void pbr_send_pbr_map(struct pbr_map_sequence *pbrms,
		      struct pbr_map_interface *pmi, bool install)
{
	struct pbr_map *pbrm = pbrms->parent;
	struct stream *s;
	uint64_t is_installed = 1 << pmi->install_bit;

	is_installed &= pbrms->installed;

	DEBUGD(&pbr_dbg_zebra, "%s: for %s %d(%" PRIu64 ")",
	       __PRETTY_FUNCTION__, pbrm->name, install, is_installed);

	/*
	 * If we are installed and asked to do so again
	 * just return.  If we are not installed and asked
	 * and asked to delete just return;
	 */
	if (install && is_installed)
		return;

	if (!install && !is_installed)
		return;

	s = zclient->obuf;
	stream_reset(s);

	zclient_create_header(s,
			      install ? ZEBRA_RULE_ADD : ZEBRA_RULE_DELETE,
			      VRF_DEFAULT);

	/*
	 * We are sending one item at a time at the moment
	 */
	stream_putl(s, 1);

	DEBUGD(&pbr_dbg_zebra, "%s: \t%s %s %d %s %u",
	       __PRETTY_FUNCTION__, install ? "Installing" : "Deleting",
	       pbrm->name, install, pmi->ifp->name, pmi->delete);

	pbr_encode_pbr_map_sequence(s, pbrms, pmi->ifp);

	stream_putw_at(s, 0, stream_get_endp(s));

	zclient_send_message(zclient);
}
Commit	Line	Data
e5c83d9b DS	1	/*
	2	* Zebra connect code.
	3	* Copyright (C) 2018 Cumulus Networks, Inc.
	4	* Donald Sharp
	5	*
	6	* FRR 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
	8	* Free Software Foundation; either version 2, or (at your option) any
	9	* later version.
	10	*
	11	* FRR is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* General Public License for more details.
	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 "stream.h"
	29	#include "memory.h"
	30	#include "zclient.h"
	31	#include "filter.h"
	32	#include "plist.h"
	33	#include "log.h"
	34	#include "nexthop.h"
	35	#include "nexthop_group.h"
	36
	37	#include "pbr_nht.h"
	38	#include "pbr_map.h"
	39	#include "pbr_memory.h"
	40	#include "pbr_zebra.h"
	41	#include "pbr_debug.h"
	42
	43	DEFINE_MTYPE_STATIC(PBRD, PBR_INTERFACE, "PBR Interface")
	44
	45	/* Zebra structure to hold current status. */
d3765386	46	struct zclient *zclient;
e5c83d9b DS	47
	48	static struct interface zebra_interface_if_lookup(struct stream s)
	49	{
	50	char ifname_tmp[INTERFACE_NAMSIZ];
	51
	52	/* Read interface name. */
	53	stream_get(ifname_tmp, s, INTERFACE_NAMSIZ);
	54
	55	/* And look it up. */
	56	return if_lookup_by_name(ifname_tmp, VRF_DEFAULT);
	57	}
	58
b13e5ad6	59	struct pbr_interface pbr_if_new(struct interface ifp)
e5c83d9b DS	60	{
	61	struct pbr_interface *pbr_ifp;
	62
	63	zassert(ifp);
	64	zassert(!ifp->info);
	65
	66	pbr_ifp = XCALLOC(MTYPE_PBR_INTERFACE, sizeof(*pbr_ifp));
	67
	68	if (!pbr_ifp) {
	69	zlog_err("%s: PBR XCALLOC(%zu) failure", __PRETTY_FUNCTION__,
	70	sizeof(*pbr_ifp));
	71	return 0;
	72	}
	73
	74	return (pbr_ifp);
	75	}
	76
	77	/* Inteface addition message from zebra. */
	78	static int interface_add(int command, struct zclient *zclient,
	79	zebra_size_t length, vrf_id_t vrf_id)
	80	{
	81	struct interface *ifp;
	82
	83	ifp = zebra_interface_add_read(zclient->ibuf, vrf_id);
	84
	85	if (!ifp)
	86	return 0;
	87
	88	if (!ifp->info) {
	89	struct pbr_interface *pbr_ifp;
	90
	91	pbr_ifp = pbr_if_new(ifp);
	92	ifp->info = pbr_ifp;
	93	}
	94
	95	return 0;
	96	}
	97
	98	static int interface_delete(int command, struct zclient *zclient,
	99	zebra_size_t length, vrf_id_t vrf_id)
	100	{
	101	struct interface *ifp;
	102	struct stream *s;
	103
	104	s = zclient->ibuf;
	105	/* zebra_interface_state_read () updates interface structure in iflist
	106	*/
	107	ifp = zebra_interface_state_read(s, vrf_id);
	108
	109	if (ifp == NULL)
	110	return 0;
	111
	112	if_set_index(ifp, IFINDEX_INTERNAL);
	113
	114	return 0;
	115	}
	116
	117	static int interface_address_add(int command, struct zclient *zclient,
	118	zebra_size_t length, vrf_id_t vrf_id)
	119	{
	120	zebra_interface_address_read(command, zclient->ibuf, vrf_id);
	121
	122	return 0;
	123	}
124
125	static int interface_address_delete(int command, struct zclient *zclient,
126	zebra_size_t length, vrf_id_t vrf_id)
127	{
128	struct connected *c;
129
130	c = zebra_interface_address_read(command, zclient->ibuf, vrf_id);
131
132	if (!c)
133	return 0;
134
135	connected_free(c);
136	return 0;
137	}
138
139	static int interface_state_up(int command, struct zclient *zclient,
140	zebra_size_t length, vrf_id_t vrf_id)
141	{
142
143	zebra_interface_if_lookup(zclient->ibuf);
144
145	return 0;
146	}
147
148	static int interface_state_down(int command, struct zclient *zclient,
149	zebra_size_t length, vrf_id_t vrf_id)
150	{
151
152	zebra_interface_state_read(zclient->ibuf, vrf_id);
153
154	return 0;
155	}
156
157	static int route_notify_owner(int command, struct zclient *zclient,
158	zebra_size_t length, vrf_id_t vrf_id)
159	{
160	struct prefix p;
161	enum zapi_route_notify_owner note;
162	uint32_t table_id;
163	char buf[PREFIX_STRLEN];
164
165	prefix2str(&p, buf, sizeof(buf));
166
167	if (!zapi_route_notify_decode(zclient->ibuf, &p, &table_id, &note))
168	return -1;
169
170	switch (note) {
171	case ZAPI_ROUTE_FAIL_INSTALL:
172	DEBUGD(&pbr_dbg_zebra,
173	"%s: [%s] Route install failure for table: %u",
174	__PRETTY_FUNCTION__, buf, table_id);
175	break;
176	case ZAPI_ROUTE_BETTER_ADMIN_WON:
177	DEBUGD(&pbr_dbg_zebra,
178	"%s: [%s] Route better admin distance won for table: %u",
179	__PRETTY_FUNCTION__, buf, table_id);
180	break;
181	case ZAPI_ROUTE_INSTALLED:
182	DEBUGD(&pbr_dbg_zebra,
183	"%s: [%s] Route installed succeeded for table: %u",
184	__PRETTY_FUNCTION__, buf, table_id);
185	pbr_nht_route_installed_for_table(table_id);
186	break;
187	case ZAPI_ROUTE_REMOVED:
188	DEBUGD(&pbr_dbg_zebra,
189	"%s: [%s] Route Removed succeeded for table: %u",
190	__PRETTY_FUNCTION__, buf, table_id);
191	pbr_nht_route_removed_for_table(table_id);
192	break;
193	case ZAPI_ROUTE_REMOVE_FAIL:
194	DEBUGD(&pbr_dbg_zebra,
195	"%s: [%s] Route remove fail for table: %u",
196	__PRETTY_FUNCTION__, buf, table_id);
197	break;
198	}
199
200	return 0;
201	}
202
203	static int rule_notify_owner(int command, struct zclient *zclient,
204	zebra_size_t length, vrf_id_t vrf_id)
205	{
206	uint32_t seqno, priority, unique;
207	enum zapi_rule_notify_owner note;
208	struct pbr_map_sequence *pbrms;
37c606ff	209	struct pbr_map_interface *pmi;
e5c83d9b	210	ifindex_t ifi;
37c606ff	211	uint64_t installed;
e5c83d9b DS	212
	213	if (!zapi_rule_notify_decode(zclient->ibuf, &seqno, &priority, &unique,
	214	&ifi, &note))
	215	return -1;
	216
37c606ff DS	217	pmi = NULL;
37c606ff DS	218	pbrms = pbrms_lookup_unique(unique, ifi, &pmi);
e5c83d9b DS	219	if (!pbrms) {
	220	DEBUGD(&pbr_dbg_zebra,
	221	"%s: Failure to lookup pbrms based upon %u",
	222	__PRETTY_FUNCTION__, unique);
	223	return 0;
	224	}
	225
37c606ff DS	226	installed = 1 << pmi->install_bit;
37c606ff DS	227
e5c83d9b DS	228	switch (note) {
	229	case ZAPI_RULE_FAIL_INSTALL:
	230	DEBUGD(&pbr_dbg_zebra, "%s: Recieved RULE_FAIL_INSTALL",
	231	__PRETTY_FUNCTION__);
37c606ff	232	pbrms->installed &= ~installed;
e5c83d9b DS	233	break;
e5c83d9b DS	234	case ZAPI_RULE_INSTALLED:
37c606ff	235	pbrms->installed \|= installed;
e5c83d9b DS	236	DEBUGD(&pbr_dbg_zebra, "%s: Recived RULE_INSTALLED",
	237	__PRETTY_FUNCTION__);
	238	break;
	239	case ZAPI_RULE_REMOVED:
	240	DEBUGD(&pbr_dbg_zebra, "%s: Received RULE REMOVED",
	241	__PRETTY_FUNCTION__);
	242	break;
	243	}
	244
	245	return 0;
	246	}
	247
	248	static void zebra_connected(struct zclient *zclient)
	249	{
	250	zclient_send_reg_requests(zclient, VRF_DEFAULT);
	251	}
	252
	253	static void route_add_helper(struct zapi_route *api, struct nexthop_group nhg,
	254	uint8_t install_afi)
	255	{
	256	struct zapi_nexthop *api_nh;
	257	struct nexthop *nhop;
	258	int i;
	259
	260	api->prefix.family = install_afi;
	261
	262	i = 0;
	263	for (ALL_NEXTHOPS(nhg, nhop)) {
	264	api_nh = &api->nexthops[i];
	265	api_nh->vrf_id = nhop->vrf_id;
	266	api_nh->type = nhop->type;
	267	switch (nhop->type) {
	268	case NEXTHOP_TYPE_IPV4:
	269	api_nh->gate.ipv4 = nhop->gate.ipv4;
	270	break;
	271	case NEXTHOP_TYPE_IPV4_IFINDEX:
	272	api_nh->gate.ipv4 = nhop->gate.ipv4;
	273	api_nh->ifindex = nhop->ifindex;
	274	break;
	275	case NEXTHOP_TYPE_IFINDEX:
	276	api_nh->ifindex = nhop->ifindex;
	277	break;
	278	case NEXTHOP_TYPE_IPV6:
	279	memcpy(&api_nh->gate.ipv6, &nhop->gate.ipv6, 16);
	280	break;
	281	case NEXTHOP_TYPE_IPV6_IFINDEX:
	282	api_nh->ifindex = nhop->ifindex;
	283	memcpy(&api_nh->gate.ipv6, &nhop->gate.ipv6, 16);
	284	break;
	285	case NEXTHOP_TYPE_BLACKHOLE:
	286	api_nh->bh_type = nhop->bh_type;
	287	break;
	288	}
	289	i++;
	290	}
	291	api->nexthop_num = i;
	292
	293	zclient_route_send(ZEBRA_ROUTE_ADD, zclient, api);
	294	}
	295
	296	/*
	297	* This function assumes a default route is being
	298	* installed into the appropriate tableid
	299	*/
300	void route_add(struct pbr_nexthop_group_cache *pnhgc, struct nexthop_group nhg,
301	afi_t install_afi)
302	{
303	struct zapi_route api;
304
305	memset(&api, 0, sizeof(api));
306
307	api.vrf_id = VRF_DEFAULT;
308	api.type = ZEBRA_ROUTE_PBR;
309	api.safi = SAFI_UNICAST;
310	/*
311	* Sending a default route
312	*/
313	api.tableid = pnhgc->table_id;
314	SET_FLAG(api.flags, ZEBRA_FLAG_ALLOW_RECURSION);
315	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
316	SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
317	switch (install_afi) {
318	case AFI_MAX:
319	route_add_helper(&api, nhg, AF_INET);
320	route_add_helper(&api, nhg, AF_INET6);
321	break;
322	case AFI_IP:
323	route_add_helper(&api, nhg, AF_INET);
324	break;
325	case AFI_IP6:
326	route_add_helper(&api, nhg, AF_INET6);
327	break;
328	case AFI_L2VPN:
329	DEBUGD(&pbr_dbg_zebra,
330	"%s: Asked to install unsupported route type: L2VPN",
331	__PRETTY_FUNCTION__);
332	break;
333	}
334	}
335
336	/*
337	* This function assumes a default route is being
338	* removed from the appropriate tableid
339	*/
340	void route_delete(struct pbr_nexthop_group_cache *pnhgc, afi_t afi)
341	{
342	struct zapi_route api;
343
344	memset(&api, 0, sizeof(api));
345	api.vrf_id = VRF_DEFAULT;
346	api.type = ZEBRA_ROUTE_PBR;
347	api.safi = SAFI_UNICAST;
348
349	api.tableid = pnhgc->table_id;
350	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
351
352	switch (afi) {
353	case AFI_IP:
354	api.prefix.family = AF_INET;
355	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
356	break;
357	case AFI_IP6:
358	api.prefix.family = AF_INET6;
359	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
360	break;
361	case AFI_MAX:
362	api.prefix.family = AF_INET;
363	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
364	api.prefix.family = AF_INET6;
365	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
366	break;
367	case AFI_L2VPN:
368	DEBUGD(&pbr_dbg_zebra,
369	"%s: Asked to delete unsupported route type: L2VPN",
370	__PRETTY_FUNCTION__);
371	break;
372	}
e5c83d9b DS	373	}
	374
	375	static int pbr_zebra_nexthop_update(int command, struct zclient *zclient,
	376	zebra_size_t length, vrf_id_t vrf_id)
	377	{
	378	struct zapi_route nhr;
	379	char buf[PREFIX2STR_BUFFER];
	380	uint32_t i;
	381
	382	zapi_nexthop_update_decode(zclient->ibuf, &nhr);
	383
	384	if (DEBUG_MODE_CHECK(&pbr_dbg_zebra, DEBUG_MODE_ALL)) {
	385
	386	DEBUGD(&pbr_dbg_zebra, "%s: Received Nexthop update: %s",
	387	__PRETTY_FUNCTION__,
	388	prefix2str(&nhr.prefix, buf, sizeof(buf)));
	389
	390	DEBUGD(&pbr_dbg_zebra, "%s: (\tNexthops(%u)",
	391	__PRETTY_FUNCTION__, nhr.nexthop_num);
	392
	393	for (i = 0; i < nhr.nexthop_num; i++) {
	394	DEBUGD(&pbr_dbg_zebra,
	395	"%s: \tType: %d: vrf: %d, ifindex: %d gate: %s",
	396	__PRETTY_FUNCTION__, nhr.nexthops[i].type,
	397	nhr.nexthops[i].vrf_id, nhr.nexthops[i].ifindex,
	398	inet_ntoa(nhr.nexthops[i].gate.ipv4));
	399	}
	400	}
	401
	402	pbr_nht_nexthop_update(&nhr);
	403	return 1;
	404	}
	405
	406	extern struct zebra_privs_t pbr_privs;
	407
	408	void pbr_zebra_init(void)
	409	{
	410	struct zclient_options opt = { .receive_notify = true };
	411
	412	zclient = zclient_new_notify(master, &opt);
	413
	414	zclient_init(zclient, ZEBRA_ROUTE_PBR, 0, &pbr_privs);
	415	zclient->zebra_connected = zebra_connected;
	416	zclient->interface_add = interface_add;
	417	zclient->interface_delete = interface_delete;
	418	zclient->interface_up = interface_state_up;
	419	zclient->interface_down = interface_state_down;
	420	zclient->interface_address_add = interface_address_add;
	421	zclient->interface_address_delete = interface_address_delete;
	422	zclient->route_notify_owner = route_notify_owner;
	423	zclient->rule_notify_owner = rule_notify_owner;
	424	zclient->nexthop_update = pbr_zebra_nexthop_update;
	425	}
	426
	427	void pbr_send_rnh(struct nexthop *nhop, bool reg)
	428	{
	429	uint32_t command;
	430	struct prefix p;
	431
	432	command = (reg) ?
	433	ZEBRA_NEXTHOP_REGISTER : ZEBRA_NEXTHOP_UNREGISTER;
	434
	435	memset(&p, 0, sizeof(p));
d3765386	436	switch (nhop->type) {
e5c83d9b DS	437	case NEXTHOP_TYPE_IFINDEX:
	438	case NEXTHOP_TYPE_BLACKHOLE:
	439	return;
	440	case NEXTHOP_TYPE_IPV4:
	441	case NEXTHOP_TYPE_IPV4_IFINDEX:
	442	p.family = AF_INET;
	443	p.u.prefix4.s_addr = nhop->gate.ipv4.s_addr;
	444	p.prefixlen = 32;
	445	break;
	446	case NEXTHOP_TYPE_IPV6:
	447	case NEXTHOP_TYPE_IPV6_IFINDEX:
	448	p.family = AF_INET6;
	449	memcpy(&p.u.prefix6, &nhop->gate.ipv6, 16);
	450	p.prefixlen = 128;
	451	break;
	452	}
	453
	454	if (zclient_send_rnh(zclient, command, &p,
	455	false, nhop->vrf_id) < 0) {
	456	zlog_warn("%s: Failure to send nexthop to zebra",
	457	__PRETTY_FUNCTION__);
	458	}
	459	}
	460
	461	static void pbr_encode_pbr_map_sequence_prefix(struct stream *s,
	462	struct prefix *p,
49027ce8	463	unsigned char family)
e5c83d9b DS	464	{
	465	struct prefix any;
	466
	467	if (!p) {
	468	memset(&any, 0, sizeof(any));
	469	any.family = family;
	470	p = &any;
	471	}
	472
	473	stream_putc(s, p->family);
	474	stream_putc(s, p->prefixlen);
	475	stream_put(s, &p->u.prefix, prefix_blen(p));
	476	}
	477
	478	static void pbr_encode_pbr_map_sequence(struct stream *s,
	479	struct pbr_map_sequence *pbrms,
	480	struct interface *ifp)
	481	{
49027ce8	482	unsigned char family;
e5c83d9b DS	483
e5c83d9b DS	484	family = AF_INET;
49027ce8 DS	485	if (pbrms->family)
49027ce8 DS	486	family = pbrms->family;
e5c83d9b DS	487
	488	stream_putl(s, pbrms->seqno);
	489	stream_putl(s, pbrms->ruleno);
	490	stream_putl(s, pbrms->unique);
	491	pbr_encode_pbr_map_sequence_prefix(s, pbrms->src, family);
	492	stream_putw(s, 0); /* src port */
	493	pbr_encode_pbr_map_sequence_prefix(s, pbrms->dst, family);
	494	stream_putw(s, 0); /* dst port */
	495	if (pbrms->nhgrp_name)
	496	stream_putl(s, pbr_nht_get_table(pbrms->nhgrp_name));
	497	else if (pbrms->nhg)
	498	stream_putl(s, pbr_nht_get_table(pbrms->internal_nhg_name));
	499	stream_putl(s, ifp->ifindex);
	500	}
	501
b13e5ad6 DS	502	void pbr_send_pbr_map(struct pbr_map_sequence *pbrms,
b13e5ad6 DS	503	struct pbr_map_interface *pmi, bool install)
e5c83d9b	504	{
b13e5ad6	505	struct pbr_map *pbrm = pbrms->parent;
e5c83d9b	506	struct stream *s;
37c606ff DS	507	uint64_t is_installed = 1 << pmi->install_bit;
	508
	509	is_installed &= pbrms->installed;
e5c83d9b	510
37c606ff DS	511	DEBUGD(&pbr_dbg_zebra, "%s: for %s %d(%" PRIu64 ")",
37c606ff DS	512	__PRETTY_FUNCTION__, pbrm->name, install, is_installed);
9b71ea4b DS	513
	514	/*
	515	* If we are installed and asked to do so again
	516	* just return. If we are not installed and asked
	517	* and asked to delete just return;
	518	*/
37c606ff	519	if (install && is_installed)
9b71ea4b DS	520	return;
9b71ea4b DS	521
37c606ff	522	if (!install && !is_installed)
9b71ea4b	523	return;
e5c83d9b DS	524
	525	s = zclient->obuf;
	526	stream_reset(s);
	527
	528	zclient_create_header(s,
	529	install ? ZEBRA_RULE_ADD : ZEBRA_RULE_DELETE,
	530	VRF_DEFAULT);
	531
b13e5ad6 DS	532	/*
	533	* We are sending one item at a time at the moment
	534	*/
	535	stream_putl(s, 1);
e5c83d9b	536
b13e5ad6 DS	537	DEBUGD(&pbr_dbg_zebra, "%s: \t%s %s %d %s %u",
	538	__PRETTY_FUNCTION__, install ? "Installing" : "Deleting",
	539	pbrm->name, install, pmi->ifp->name, pmi->delete);
e5c83d9b	540
b13e5ad6	541	pbr_encode_pbr_map_sequence(s, pbrms, pmi->ifp);
e5c83d9b	542
e5c83d9b DS	543	stream_putw_at(s, 0, stream_get_endp(s));
e5c83d9b DS	544
e5c83d9b DS	545	zclient_send_message(zclient);
e5c83d9b DS	546	}