[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;

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));

	ifp->info = pbr_ifp;
	return pbr_ifp;
}

/* Inteface addition message from zebra. */
int pbr_ifp_create(struct interface *ifp)
{
	DEBUGD(&pbr_dbg_zebra,
	       "%s: %s", __PRETTY_FUNCTION__, ifp->name);

	if (!ifp->info)
		pbr_if_new(ifp);

	pbr_nht_nexthop_interface_update(ifp);

	return 0;
}

int pbr_ifp_destroy(struct interface *ifp)
{
	DEBUGD(&pbr_dbg_zebra,
	       "%s: %s", __PRETTY_FUNCTION__, ifp->name);

	return 0;
}

static int interface_address_add(ZAPI_CALLBACK_ARGS)
{
	struct connected *c;
	char buf[PREFIX_STRLEN];

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

	DEBUGD(&pbr_dbg_zebra,
	       "%s: %s added %s", __PRETTY_FUNCTION__,
	       c ? c->ifp->name : "Unknown",
	       c ? prefix2str(c->address, buf, sizeof(buf)) : "Unknown");

	return 0;
}

static int interface_address_delete(ZAPI_CALLBACK_ARGS)
{
	struct connected *c;
	char buf[PREFIX_STRLEN];

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

	if (!c)
		return 0;

	DEBUGD(&pbr_dbg_zebra,
	       "%s: %s deleted %s", __PRETTY_FUNCTION__, c->ifp->name,
	       prefix2str(c->address, buf, sizeof(buf)));

	connected_free(c);
	return 0;
}

int pbr_ifp_up(struct interface *ifp)
{
	DEBUGD(&pbr_dbg_zebra,
	       "%s: %s is up", __PRETTY_FUNCTION__, ifp->name);

	pbr_nht_nexthop_interface_update(ifp);

	return 0;
}

int pbr_ifp_down(struct interface *ifp)
{
	DEBUGD(&pbr_dbg_zebra,
	       "%s: %s is down", __PRETTY_FUNCTION__, ifp->name);

	pbr_nht_nexthop_interface_update(ifp);

	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:
		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(ZAPI_CALLBACK_ARGS)
{
	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:
		pbrms->installed &= ~installed;
		DEBUGD(&pbr_dbg_zebra,
		       "%s: Received RULE_FAIL_INSTALL: %" PRIu64,
		       __PRETTY_FUNCTION__, pbrms->installed);
		break;
	case ZAPI_RULE_INSTALLED:
		pbrms->installed |= installed;
		DEBUGD(&pbr_dbg_zebra, "%s: Received RULE_INSTALLED: %" PRIu64,
		       __PRETTY_FUNCTION__, pbrms->installed);
		break;
	case ZAPI_RULE_FAIL_REMOVE:
	case ZAPI_RULE_REMOVED:
		pbrms->installed &= ~installed;
		DEBUGD(&pbr_dbg_zebra, "%s: Received RULE REMOVED: %" PRIu64,
		       __PRETTY_FUNCTION__, pbrms->installed);
		break;
	}

	pbr_map_final_interface_deletion(pbrms->parent, pmi);

	return 0;
}

static void zebra_connected(struct zclient *zclient)
{
	DEBUGD(&pbr_dbg_zebra, "%s: Registering for fun and profit",
	       __PRETTY_FUNCTION__);
	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;
	char buf[PREFIX_STRLEN];
	struct nexthop *nhop;
	int i;

	api->prefix.family = install_afi;

	DEBUGD(&pbr_dbg_zebra, "\tEncoding %s",
	       prefix2str(&api->prefix, buf, sizeof(buf)));

	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;

	DEBUGD(&pbr_dbg_zebra, "%s for Table: %d", __PRETTY_FUNCTION__,
	       pnhgc->table_id);

	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;
	case AFI_UNSPEC:
		DEBUGD(&pbr_dbg_zebra,
		       "%s: Asked to install unspecified route type",
		       __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;

	DEBUGD(&pbr_dbg_zebra, "%s for Table: %d", __PRETTY_FUNCTION__,
	       pnhgc->table_id);

	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;
	case AFI_UNSPEC:
		DEBUGD(&pbr_dbg_zebra,
		       "%s: Asked to delete unspecified route type",
		       __PRETTY_FUNCTION__);
		break;
	}
}

static int pbr_zebra_nexthop_update(ZAPI_CALLBACK_ARGS)
{
	struct zapi_route nhr;
	char buf[PREFIX2STR_BUFFER];
	uint32_t i;

	if (!zapi_nexthop_update_decode(zclient->ibuf, &nhr)) {
		zlog_warn("Failure to decode Nexthop update message");
		return 0;
	}

	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(master, &opt);

	zclient_init(zclient, ZEBRA_ROUTE_PBR, 0, &pbr_privs);
	zclient->zebra_connected = zebra_connected;
	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;
		if (IN6_IS_ADDR_LINKLOCAL(&nhop->gate.ipv6))
			/*
			 * Don't bother tracking link locals, just track their
			 * interface state.
			 */
			return;
		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 */
	stream_putl(s, pbrms->mark);
	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 = (uint64_t)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	47
b13e5ad6	48	struct pbr_interface pbr_if_new(struct interface ifp)
e5c83d9b DS	49	{
	50	struct pbr_interface *pbr_ifp;
	51
	52	zassert(ifp);
	53	zassert(!ifp->info);
	54
	55	pbr_ifp = XCALLOC(MTYPE_PBR_INTERFACE, sizeof(*pbr_ifp));
	56
10a00758 DS	57	ifp->info = pbr_ifp;
10a00758 DS	58	return pbr_ifp;
e5c83d9b DS	59	}
	60
	61	/* Inteface addition message from zebra. */
ef7bd2a3	62	int pbr_ifp_create(struct interface *ifp)
e5c83d9b	63	{
2f61710b DS	64	DEBUGD(&pbr_dbg_zebra,
	65	"%s: %s", __PRETTY_FUNCTION__, ifp->name);
	66
10a00758 DS	67	if (!ifp->info)
10a00758 DS	68	pbr_if_new(ifp);
e5c83d9b	69
a106a408 RW	70	pbr_nht_nexthop_interface_update(ifp);
a106a408 RW	71
e5c83d9b DS	72	return 0;
	73	}
	74
3c3c3252	75	int pbr_ifp_destroy(struct interface *ifp)
e5c83d9b	76	{
2f61710b DS	77	DEBUGD(&pbr_dbg_zebra,
	78	"%s: %s", __PRETTY_FUNCTION__, ifp->name);
	79
e5c83d9b DS	80	return 0;
	81	}
	82
121f9dee	83	static int interface_address_add(ZAPI_CALLBACK_ARGS)
e5c83d9b	84	{
2f61710b DS	85	struct connected *c;
	86	char buf[PREFIX_STRLEN];
	87
121f9dee	88	c = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
2f61710b DS	89
2f61710b DS	90	DEBUGD(&pbr_dbg_zebra,
964c3dba DS	91	"%s: %s added %s", __PRETTY_FUNCTION__,
	92	c ? c->ifp->name : "Unknown",
	93	c ? prefix2str(c->address, buf, sizeof(buf)) : "Unknown");
e5c83d9b DS	94
	95	return 0;
	96	}
	97
121f9dee	98	static int interface_address_delete(ZAPI_CALLBACK_ARGS)
e5c83d9b DS	99	{
e5c83d9b DS	100	struct connected *c;
2f61710b	101	char buf[PREFIX_STRLEN];
e5c83d9b	102
121f9dee	103	c = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
e5c83d9b DS	104
	105	if (!c)
	106	return 0;
	107
2f61710b DS	108	DEBUGD(&pbr_dbg_zebra,
	109	"%s: %s deleted %s", __PRETTY_FUNCTION__, c->ifp->name,
	110	prefix2str(c->address, buf, sizeof(buf)));
	111
e5c83d9b DS	112	connected_free(c);
	113	return 0;
	114	}
	115
ddbf3e60	116	int pbr_ifp_up(struct interface *ifp)
e5c83d9b	117	{
2f61710b DS	118	DEBUGD(&pbr_dbg_zebra,
2f61710b DS	119	"%s: %s is up", __PRETTY_FUNCTION__, ifp->name);
e5c83d9b	120
a106a408 RW	121	pbr_nht_nexthop_interface_update(ifp);
a106a408 RW	122
e5c83d9b DS	123	return 0;
	124	}
	125
b0b69e59	126	int pbr_ifp_down(struct interface *ifp)
e5c83d9b	127	{
2f61710b DS	128	DEBUGD(&pbr_dbg_zebra,
2f61710b DS	129	"%s: %s is down", __PRETTY_FUNCTION__, ifp->name);
e5c83d9b	130
a106a408 RW	131	pbr_nht_nexthop_interface_update(ifp);
a106a408 RW	132
e5c83d9b DS	133	return 0;
	134	}
	135
121f9dee	136	static int route_notify_owner(ZAPI_CALLBACK_ARGS)
e5c83d9b DS	137	{
	138	struct prefix p;
	139	enum zapi_route_notify_owner note;
	140	uint32_t table_id;
	141	char buf[PREFIX_STRLEN];
	142
e5c83d9b DS	143	if (!zapi_route_notify_decode(zclient->ibuf, &p, &table_id, &note))
	144	return -1;
	145
2f61710b DS	146	prefix2str(&p, buf, sizeof(buf));
2f61710b DS	147
e5c83d9b DS	148	switch (note) {
	149	case ZAPI_ROUTE_FAIL_INSTALL:
	150	DEBUGD(&pbr_dbg_zebra,
	151	"%s: [%s] Route install failure for table: %u",
	152	__PRETTY_FUNCTION__, buf, table_id);
	153	break;
	154	case ZAPI_ROUTE_BETTER_ADMIN_WON:
	155	DEBUGD(&pbr_dbg_zebra,
	156	"%s: [%s] Route better admin distance won for table: %u",
	157	__PRETTY_FUNCTION__, buf, table_id);
	158	break;
	159	case ZAPI_ROUTE_INSTALLED:
	160	DEBUGD(&pbr_dbg_zebra,
	161	"%s: [%s] Route installed succeeded for table: %u",
	162	__PRETTY_FUNCTION__, buf, table_id);
	163	pbr_nht_route_installed_for_table(table_id);
	164	break;
	165	case ZAPI_ROUTE_REMOVED:
	166	DEBUGD(&pbr_dbg_zebra,
	167	"%s: [%s] Route Removed succeeded for table: %u",
	168	__PRETTY_FUNCTION__, buf, table_id);
	169	pbr_nht_route_removed_for_table(table_id);
	170	break;
	171	case ZAPI_ROUTE_REMOVE_FAIL:
	172	DEBUGD(&pbr_dbg_zebra,
	173	"%s: [%s] Route remove fail for table: %u",
	174	__PRETTY_FUNCTION__, buf, table_id);
	175	break;
	176	}
	177
	178	return 0;
	179	}
	180
121f9dee	181	static int rule_notify_owner(ZAPI_CALLBACK_ARGS)
e5c83d9b DS	182	{
	183	uint32_t seqno, priority, unique;
	184	enum zapi_rule_notify_owner note;
	185	struct pbr_map_sequence *pbrms;
37c606ff	186	struct pbr_map_interface *pmi;
e5c83d9b	187	ifindex_t ifi;
37c606ff	188	uint64_t installed;
e5c83d9b DS	189
	190	if (!zapi_rule_notify_decode(zclient->ibuf, &seqno, &priority, &unique,
	191	&ifi, &note))
	192	return -1;
	193
37c606ff DS	194	pmi = NULL;
37c606ff DS	195	pbrms = pbrms_lookup_unique(unique, ifi, &pmi);
e5c83d9b DS	196	if (!pbrms) {
	197	DEBUGD(&pbr_dbg_zebra,
	198	"%s: Failure to lookup pbrms based upon %u",
	199	__PRETTY_FUNCTION__, unique);
	200	return 0;
	201	}
	202
37c606ff DS	203	installed = 1 << pmi->install_bit;
37c606ff DS	204
e5c83d9b DS	205	switch (note) {
e5c83d9b DS	206	case ZAPI_RULE_FAIL_INSTALL:
37c606ff	207	pbrms->installed &= ~installed;
fa0069c6 DS	208	DEBUGD(&pbr_dbg_zebra,
fa0069c6 DS	209	"%s: Received RULE_FAIL_INSTALL: %" PRIu64,
2f61710b	210	__PRETTY_FUNCTION__, pbrms->installed);
e5c83d9b DS	211	break;
e5c83d9b DS	212	case ZAPI_RULE_INSTALLED:
37c606ff	213	pbrms->installed \|= installed;
fa0069c6	214	DEBUGD(&pbr_dbg_zebra, "%s: Received RULE_INSTALLED: %" PRIu64,
2f61710b	215	__PRETTY_FUNCTION__, pbrms->installed);
e5c83d9b	216	break;
373dd3b5	217	case ZAPI_RULE_FAIL_REMOVE:
e5c83d9b	218	case ZAPI_RULE_REMOVED:
0f03639d	219	pbrms->installed &= ~installed;
fa0069c6	220	DEBUGD(&pbr_dbg_zebra, "%s: Received RULE REMOVED: %" PRIu64,
2f61710b	221	__PRETTY_FUNCTION__, pbrms->installed);
e5c83d9b DS	222	break;
	223	}
	224
38e9ccde DS	225	pbr_map_final_interface_deletion(pbrms->parent, pmi);
38e9ccde DS	226
e5c83d9b DS	227	return 0;
	228	}
	229
	230	static void zebra_connected(struct zclient *zclient)
	231	{
2f61710b DS	232	DEBUGD(&pbr_dbg_zebra, "%s: Registering for fun and profit",
2f61710b DS	233	__PRETTY_FUNCTION__);
e5c83d9b DS	234	zclient_send_reg_requests(zclient, VRF_DEFAULT);
	235	}
	236
	237	static void route_add_helper(struct zapi_route *api, struct nexthop_group nhg,
	238	uint8_t install_afi)
	239	{
	240	struct zapi_nexthop *api_nh;
2f61710b	241	char buf[PREFIX_STRLEN];
e5c83d9b DS	242	struct nexthop *nhop;
	243	int i;
	244
	245	api->prefix.family = install_afi;
	246
2f61710b DS	247	DEBUGD(&pbr_dbg_zebra, "\tEncoding %s",
	248	prefix2str(&api->prefix, buf, sizeof(buf)));
	249
e5c83d9b DS	250	i = 0;
	251	for (ALL_NEXTHOPS(nhg, nhop)) {
	252	api_nh = &api->nexthops[i];
	253	api_nh->vrf_id = nhop->vrf_id;
	254	api_nh->type = nhop->type;
	255	switch (nhop->type) {
	256	case NEXTHOP_TYPE_IPV4:
	257	api_nh->gate.ipv4 = nhop->gate.ipv4;
	258	break;
	259	case NEXTHOP_TYPE_IPV4_IFINDEX:
	260	api_nh->gate.ipv4 = nhop->gate.ipv4;
	261	api_nh->ifindex = nhop->ifindex;
	262	break;
	263	case NEXTHOP_TYPE_IFINDEX:
	264	api_nh->ifindex = nhop->ifindex;
	265	break;
	266	case NEXTHOP_TYPE_IPV6:
	267	memcpy(&api_nh->gate.ipv6, &nhop->gate.ipv6, 16);
	268	break;
	269	case NEXTHOP_TYPE_IPV6_IFINDEX:
	270	api_nh->ifindex = nhop->ifindex;
	271	memcpy(&api_nh->gate.ipv6, &nhop->gate.ipv6, 16);
	272	break;
	273	case NEXTHOP_TYPE_BLACKHOLE:
	274	api_nh->bh_type = nhop->bh_type;
	275	break;
	276	}
	277	i++;
	278	}
	279	api->nexthop_num = i;
	280
	281	zclient_route_send(ZEBRA_ROUTE_ADD, zclient, api);
	282	}
	283
	284	/*
	285	* This function assumes a default route is being
	286	* installed into the appropriate tableid
	287	*/
	288	void route_add(struct pbr_nexthop_group_cache *pnhgc, struct nexthop_group nhg,
	289	afi_t install_afi)
	290	{
	291	struct zapi_route api;
	292
2f61710b DS	293	DEBUGD(&pbr_dbg_zebra, "%s for Table: %d", __PRETTY_FUNCTION__,
	294	pnhgc->table_id);
	295
e5c83d9b DS	296	memset(&api, 0, sizeof(api));
	297
	298	api.vrf_id = VRF_DEFAULT;
	299	api.type = ZEBRA_ROUTE_PBR;
	300	api.safi = SAFI_UNICAST;
	301	/*
	302	* Sending a default route
	303	*/
	304	api.tableid = pnhgc->table_id;
	305	SET_FLAG(api.flags, ZEBRA_FLAG_ALLOW_RECURSION);
	306	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
	307	SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
	308	switch (install_afi) {
	309	case AFI_MAX:
	310	route_add_helper(&api, nhg, AF_INET);
	311	route_add_helper(&api, nhg, AF_INET6);
	312	break;
	313	case AFI_IP:
	314	route_add_helper(&api, nhg, AF_INET);
	315	break;
	316	case AFI_IP6:
	317	route_add_helper(&api, nhg, AF_INET6);
	318	break;
	319	case AFI_L2VPN:
	320	DEBUGD(&pbr_dbg_zebra,
	321	"%s: Asked to install unsupported route type: L2VPN",
	322	__PRETTY_FUNCTION__);
	323	break;
b26f891d SW	324	case AFI_UNSPEC:
	325	DEBUGD(&pbr_dbg_zebra,
	326	"%s: Asked to install unspecified route type",
	327	__PRETTY_FUNCTION__);
	328	break;
e5c83d9b DS	329	}
	330	}
	331
	332	/*
	333	* This function assumes a default route is being
	334	* removed from the appropriate tableid
	335	*/
	336	void route_delete(struct pbr_nexthop_group_cache *pnhgc, afi_t afi)
	337	{
	338	struct zapi_route api;
	339
2f61710b DS	340	DEBUGD(&pbr_dbg_zebra, "%s for Table: %d", __PRETTY_FUNCTION__,
	341	pnhgc->table_id);
	342
e5c83d9b DS	343	memset(&api, 0, sizeof(api));
	344	api.vrf_id = VRF_DEFAULT;
	345	api.type = ZEBRA_ROUTE_PBR;
	346	api.safi = SAFI_UNICAST;
	347
	348	api.tableid = pnhgc->table_id;
	349	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
	350
	351	switch (afi) {
	352	case AFI_IP:
	353	api.prefix.family = AF_INET;
	354	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	355	break;
	356	case AFI_IP6:
	357	api.prefix.family = AF_INET6;
	358	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	359	break;
	360	case AFI_MAX:
	361	api.prefix.family = AF_INET;
	362	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	363	api.prefix.family = AF_INET6;
	364	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	365	break;
	366	case AFI_L2VPN:
	367	DEBUGD(&pbr_dbg_zebra,
	368	"%s: Asked to delete unsupported route type: L2VPN",
	369	__PRETTY_FUNCTION__);
	370	break;
b26f891d SW	371	case AFI_UNSPEC:
	372	DEBUGD(&pbr_dbg_zebra,
	373	"%s: Asked to delete unspecified route type",
	374	__PRETTY_FUNCTION__);
	375	break;
e5c83d9b	376	}
e5c83d9b DS	377	}
e5c83d9b DS	378
121f9dee	379	static int pbr_zebra_nexthop_update(ZAPI_CALLBACK_ARGS)
e5c83d9b DS	380	{
	381	struct zapi_route nhr;
	382	char buf[PREFIX2STR_BUFFER];
	383	uint32_t i;
	384
54317f2c A	385	if (!zapi_nexthop_update_decode(zclient->ibuf, &nhr)) {
	386	zlog_warn("Failure to decode Nexthop update message");
	387	return 0;
	388	}
e5c83d9b DS	389
	390	if (DEBUG_MODE_CHECK(&pbr_dbg_zebra, DEBUG_MODE_ALL)) {
	391
	392	DEBUGD(&pbr_dbg_zebra, "%s: Received Nexthop update: %s",
	393	__PRETTY_FUNCTION__,
	394	prefix2str(&nhr.prefix, buf, sizeof(buf)));
	395
	396	DEBUGD(&pbr_dbg_zebra, "%s: (\tNexthops(%u)",
	397	__PRETTY_FUNCTION__, nhr.nexthop_num);
	398
	399	for (i = 0; i < nhr.nexthop_num; i++) {
	400	DEBUGD(&pbr_dbg_zebra,
	401	"%s: \tType: %d: vrf: %d, ifindex: %d gate: %s",
	402	__PRETTY_FUNCTION__, nhr.nexthops[i].type,
	403	nhr.nexthops[i].vrf_id, nhr.nexthops[i].ifindex,
	404	inet_ntoa(nhr.nexthops[i].gate.ipv4));
	405	}
	406	}
	407
	408	pbr_nht_nexthop_update(&nhr);
	409	return 1;
	410	}
	411
	412	extern struct zebra_privs_t pbr_privs;
	413
	414	void pbr_zebra_init(void)
	415	{
	416	struct zclient_options opt = { .receive_notify = true };
	417
26f63a1e	418	zclient = zclient_new(master, &opt);
e5c83d9b DS	419
	420	zclient_init(zclient, ZEBRA_ROUTE_PBR, 0, &pbr_privs);
	421	zclient->zebra_connected = zebra_connected;
e5c83d9b DS	422	zclient->interface_address_add = interface_address_add;
	423	zclient->interface_address_delete = interface_address_delete;
	424	zclient->route_notify_owner = route_notify_owner;
	425	zclient->rule_notify_owner = rule_notify_owner;
	426	zclient->nexthop_update = pbr_zebra_nexthop_update;
	427	}
	428
	429	void pbr_send_rnh(struct nexthop *nhop, bool reg)
	430	{
	431	uint32_t command;
	432	struct prefix p;
	433
	434	command = (reg) ?
	435	ZEBRA_NEXTHOP_REGISTER : ZEBRA_NEXTHOP_UNREGISTER;
	436
	437	memset(&p, 0, sizeof(p));
d3765386	438	switch (nhop->type) {
e5c83d9b DS	439	case NEXTHOP_TYPE_IFINDEX:
	440	case NEXTHOP_TYPE_BLACKHOLE:
	441	return;
	442	case NEXTHOP_TYPE_IPV4:
	443	case NEXTHOP_TYPE_IPV4_IFINDEX:
	444	p.family = AF_INET;
	445	p.u.prefix4.s_addr = nhop->gate.ipv4.s_addr;
	446	p.prefixlen = 32;
	447	break;
	448	case NEXTHOP_TYPE_IPV6:
	449	case NEXTHOP_TYPE_IPV6_IFINDEX:
	450	p.family = AF_INET6;
	451	memcpy(&p.u.prefix6, &nhop->gate.ipv6, 16);
	452	p.prefixlen = 128;
cb254f41 SW	453	if (IN6_IS_ADDR_LINKLOCAL(&nhop->gate.ipv6))
	454	/*
	455	* Don't bother tracking link locals, just track their
	456	* interface state.
	457	*/
	458	return;
e5c83d9b DS	459	break;
	460	}
	461
	462	if (zclient_send_rnh(zclient, command, &p,
	463	false, nhop->vrf_id) < 0) {
	464	zlog_warn("%s: Failure to send nexthop to zebra",
	465	__PRETTY_FUNCTION__);
	466	}
	467	}
	468
	469	static void pbr_encode_pbr_map_sequence_prefix(struct stream *s,
	470	struct prefix *p,
49027ce8	471	unsigned char family)
e5c83d9b DS	472	{
	473	struct prefix any;
	474
	475	if (!p) {
	476	memset(&any, 0, sizeof(any));
	477	any.family = family;
	478	p = &any;
	479	}
	480
	481	stream_putc(s, p->family);
	482	stream_putc(s, p->prefixlen);
	483	stream_put(s, &p->u.prefix, prefix_blen(p));
	484	}
	485
	486	static void pbr_encode_pbr_map_sequence(struct stream *s,
	487	struct pbr_map_sequence *pbrms,
	488	struct interface *ifp)
	489	{
49027ce8	490	unsigned char family;
e5c83d9b DS	491
e5c83d9b DS	492	family = AF_INET;
49027ce8 DS	493	if (pbrms->family)
49027ce8 DS	494	family = pbrms->family;
e5c83d9b DS	495
	496	stream_putl(s, pbrms->seqno);
	497	stream_putl(s, pbrms->ruleno);
	498	stream_putl(s, pbrms->unique);
	499	pbr_encode_pbr_map_sequence_prefix(s, pbrms->src, family);
	500	stream_putw(s, 0); /* src port */
	501	pbr_encode_pbr_map_sequence_prefix(s, pbrms->dst, family);
	502	stream_putw(s, 0); /* dst port */
95a9fe02	503	stream_putl(s, pbrms->mark);
e5c83d9b DS	504	if (pbrms->nhgrp_name)
	505	stream_putl(s, pbr_nht_get_table(pbrms->nhgrp_name));
	506	else if (pbrms->nhg)
	507	stream_putl(s, pbr_nht_get_table(pbrms->internal_nhg_name));
	508	stream_putl(s, ifp->ifindex);
	509	}
	510
b13e5ad6 DS	511	void pbr_send_pbr_map(struct pbr_map_sequence *pbrms,
b13e5ad6 DS	512	struct pbr_map_interface *pmi, bool install)
e5c83d9b	513	{
b13e5ad6	514	struct pbr_map *pbrm = pbrms->parent;
e5c83d9b	515	struct stream *s;
10a00758	516	uint64_t is_installed = (uint64_t)1 << pmi->install_bit;
37c606ff DS	517
37c606ff DS	518	is_installed &= pbrms->installed;
e5c83d9b	519
37c606ff DS	520	DEBUGD(&pbr_dbg_zebra, "%s: for %s %d(%" PRIu64 ")",
37c606ff DS	521	__PRETTY_FUNCTION__, pbrm->name, install, is_installed);
9b71ea4b DS	522
	523	/*
	524	* If we are installed and asked to do so again
	525	* just return. If we are not installed and asked
	526	* and asked to delete just return;
	527	*/
37c606ff	528	if (install && is_installed)
9b71ea4b DS	529	return;
9b71ea4b DS	530
37c606ff	531	if (!install && !is_installed)
9b71ea4b	532	return;
e5c83d9b DS	533
	534	s = zclient->obuf;
	535	stream_reset(s);
	536
	537	zclient_create_header(s,
	538	install ? ZEBRA_RULE_ADD : ZEBRA_RULE_DELETE,
	539	VRF_DEFAULT);
	540
b13e5ad6 DS	541	/*
	542	* We are sending one item at a time at the moment
	543	*/
	544	stream_putl(s, 1);
e5c83d9b	545
b13e5ad6 DS	546	DEBUGD(&pbr_dbg_zebra, "%s: \t%s %s %d %s %u",
	547	__PRETTY_FUNCTION__, install ? "Installing" : "Deleting",
	548	pbrm->name, install, pmi->ifp->name, pmi->delete);
e5c83d9b	549
b13e5ad6	550	pbr_encode_pbr_map_sequence(s, pbrms, pmi->ifp);
e5c83d9b	551
e5c83d9b DS	552	stream_putw_at(s, 0, stream_get_endp(s));
e5c83d9b DS	553
e5c83d9b DS	554	zclient_send_message(zclient);
e5c83d9b DS	555	}