[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. */
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;

	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;
}

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;

	DEBUGD(&pbr_dbg_zebra,
	       "%s: %s", __PRETTY_FUNCTION__, ifp->name);

	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)
{
	struct connected *c;
	char buf[PREFIX_STRLEN];

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

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

	return 0;
}

static int interface_address_delete(int command, struct zclient *zclient,
				    zebra_size_t length, vrf_id_t vrf_id)
{
	struct connected *c;
	char buf[PREFIX_STRLEN];

	c = zebra_interface_address_read(command, 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;
}

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_state_read(zclient->ibuf, vrf_id);

	DEBUGD(&pbr_dbg_zebra,
	       "%s: %s is up", __PRETTY_FUNCTION__, ifp->name);

	pbr_nht_nexthop_interface_update(ifp);

	return 0;
}

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

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

	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(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];

	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(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:
		pbrms->installed &= ~installed;
		DEBUGD(&pbr_dbg_zebra, "%s: Received RULE_FAIL_INSTALL: %lu",
		       __PRETTY_FUNCTION__, pbrms->installed);
		break;
	case ZAPI_RULE_INSTALLED:
		pbrms->installed |= installed;
		DEBUGD(&pbr_dbg_zebra, "%s: Received RULE_INSTALLED: %lu",
		       __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: %lu",
		       __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;
	}
}

/*
 * 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;
	}
}

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;

	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_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 */
	stream_putl(s, 0);  /* fwmark */
	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. */
	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
2f61710b DS	72	DEBUGD(&pbr_dbg_zebra,
	73	"%s: %s", __PRETTY_FUNCTION__, ifp->name);
	74
10a00758 DS	75	if (!ifp->info)
10a00758 DS	76	pbr_if_new(ifp);
e5c83d9b	77
a106a408 RW	78	pbr_nht_nexthop_interface_update(ifp);
a106a408 RW	79
e5c83d9b DS	80	return 0;
	81	}
	82
	83	static int interface_delete(int command, struct zclient *zclient,
	84	zebra_size_t length, vrf_id_t vrf_id)
	85	{
	86	struct interface *ifp;
	87	struct stream *s;
	88
	89	s = zclient->ibuf;
	90	/* zebra_interface_state_read () updates interface structure in iflist
	91	*/
	92	ifp = zebra_interface_state_read(s, vrf_id);
	93
	94	if (ifp == NULL)
	95	return 0;
	96
2f61710b DS	97	DEBUGD(&pbr_dbg_zebra,
	98	"%s: %s", __PRETTY_FUNCTION__, ifp->name);
	99
e5c83d9b DS	100	if_set_index(ifp, IFINDEX_INTERNAL);
	101
	102	return 0;
	103	}
	104
	105	static int interface_address_add(int command, struct zclient *zclient,
	106	zebra_size_t length, vrf_id_t vrf_id)
	107	{
2f61710b DS	108	struct connected *c;
	109	char buf[PREFIX_STRLEN];
	110
	111	c = zebra_interface_address_read(command, zclient->ibuf, vrf_id);
	112
	113	DEBUGD(&pbr_dbg_zebra,
	114	"%s: %s added %s", __PRETTY_FUNCTION__, c->ifp->name,
	115	prefix2str(c->address, buf, sizeof(buf)));
e5c83d9b DS	116
	117	return 0;
	118	}
	119
	120	static int interface_address_delete(int command, struct zclient *zclient,
	121	zebra_size_t length, vrf_id_t vrf_id)
	122	{
	123	struct connected *c;
2f61710b	124	char buf[PREFIX_STRLEN];
e5c83d9b DS	125
	126	c = zebra_interface_address_read(command, zclient->ibuf, vrf_id);
	127
	128	if (!c)
	129	return 0;
	130
2f61710b DS	131	DEBUGD(&pbr_dbg_zebra,
	132	"%s: %s deleted %s", __PRETTY_FUNCTION__, c->ifp->name,
	133	prefix2str(c->address, buf, sizeof(buf)));
	134
e5c83d9b DS	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	{
2f61710b DS	142	struct interface *ifp;
	143
	144	ifp = zebra_interface_state_read(zclient->ibuf, vrf_id);
e5c83d9b	145
2f61710b DS	146	DEBUGD(&pbr_dbg_zebra,
2f61710b DS	147	"%s: %s is up", __PRETTY_FUNCTION__, ifp->name);
e5c83d9b	148
a106a408 RW	149	pbr_nht_nexthop_interface_update(ifp);
a106a408 RW	150
e5c83d9b DS	151	return 0;
	152	}
	153
	154	static int interface_state_down(int command, struct zclient *zclient,
	155	zebra_size_t length, vrf_id_t vrf_id)
	156	{
2f61710b	157	struct interface *ifp;
e5c83d9b	158
2f61710b DS	159	ifp = zebra_interface_state_read(zclient->ibuf, vrf_id);
	160
	161	DEBUGD(&pbr_dbg_zebra,
	162	"%s: %s is down", __PRETTY_FUNCTION__, ifp->name);
e5c83d9b	163
a106a408 RW	164	pbr_nht_nexthop_interface_update(ifp);
a106a408 RW	165
e5c83d9b DS	166	return 0;
	167	}
	168
	169	static int route_notify_owner(int command, struct zclient *zclient,
	170	zebra_size_t length, vrf_id_t vrf_id)
	171	{
	172	struct prefix p;
	173	enum zapi_route_notify_owner note;
	174	uint32_t table_id;
	175	char buf[PREFIX_STRLEN];
	176
e5c83d9b DS	177	if (!zapi_route_notify_decode(zclient->ibuf, &p, &table_id, &note))
	178	return -1;
	179
2f61710b DS	180	prefix2str(&p, buf, sizeof(buf));
2f61710b DS	181
e5c83d9b DS	182	switch (note) {
	183	case ZAPI_ROUTE_FAIL_INSTALL:
	184	DEBUGD(&pbr_dbg_zebra,
	185	"%s: [%s] Route install failure for table: %u",
	186	__PRETTY_FUNCTION__, buf, table_id);
	187	break;
	188	case ZAPI_ROUTE_BETTER_ADMIN_WON:
	189	DEBUGD(&pbr_dbg_zebra,
	190	"%s: [%s] Route better admin distance won for table: %u",
	191	__PRETTY_FUNCTION__, buf, table_id);
	192	break;
	193	case ZAPI_ROUTE_INSTALLED:
	194	DEBUGD(&pbr_dbg_zebra,
	195	"%s: [%s] Route installed succeeded for table: %u",
	196	__PRETTY_FUNCTION__, buf, table_id);
	197	pbr_nht_route_installed_for_table(table_id);
	198	break;
	199	case ZAPI_ROUTE_REMOVED:
	200	DEBUGD(&pbr_dbg_zebra,
	201	"%s: [%s] Route Removed succeeded for table: %u",
	202	__PRETTY_FUNCTION__, buf, table_id);
	203	pbr_nht_route_removed_for_table(table_id);
	204	break;
	205	case ZAPI_ROUTE_REMOVE_FAIL:
	206	DEBUGD(&pbr_dbg_zebra,
	207	"%s: [%s] Route remove fail for table: %u",
	208	__PRETTY_FUNCTION__, buf, table_id);
	209	break;
	210	}
	211
	212	return 0;
	213	}
	214
	215	static int rule_notify_owner(int command, struct zclient *zclient,
	216	zebra_size_t length, vrf_id_t vrf_id)
	217	{
	218	uint32_t seqno, priority, unique;
	219	enum zapi_rule_notify_owner note;
	220	struct pbr_map_sequence *pbrms;
37c606ff	221	struct pbr_map_interface *pmi;
e5c83d9b	222	ifindex_t ifi;
37c606ff	223	uint64_t installed;
e5c83d9b DS	224
	225	if (!zapi_rule_notify_decode(zclient->ibuf, &seqno, &priority, &unique,
	226	&ifi, &note))
	227	return -1;
	228
37c606ff DS	229	pmi = NULL;
37c606ff DS	230	pbrms = pbrms_lookup_unique(unique, ifi, &pmi);
e5c83d9b DS	231	if (!pbrms) {
	232	DEBUGD(&pbr_dbg_zebra,
	233	"%s: Failure to lookup pbrms based upon %u",
	234	__PRETTY_FUNCTION__, unique);
	235	return 0;
	236	}
	237
37c606ff DS	238	installed = 1 << pmi->install_bit;
37c606ff DS	239
e5c83d9b DS	240	switch (note) {
e5c83d9b DS	241	case ZAPI_RULE_FAIL_INSTALL:
37c606ff	242	pbrms->installed &= ~installed;
2f61710b DS	243	DEBUGD(&pbr_dbg_zebra, "%s: Received RULE_FAIL_INSTALL: %lu",
2f61710b DS	244	__PRETTY_FUNCTION__, pbrms->installed);
e5c83d9b DS	245	break;
e5c83d9b DS	246	case ZAPI_RULE_INSTALLED:
37c606ff	247	pbrms->installed \|= installed;
2f61710b DS	248	DEBUGD(&pbr_dbg_zebra, "%s: Received RULE_INSTALLED: %lu",
2f61710b DS	249	__PRETTY_FUNCTION__, pbrms->installed);
e5c83d9b	250	break;
373dd3b5	251	case ZAPI_RULE_FAIL_REMOVE:
e5c83d9b	252	case ZAPI_RULE_REMOVED:
0f03639d	253	pbrms->installed &= ~installed;
2f61710b DS	254	DEBUGD(&pbr_dbg_zebra, "%s: Received RULE REMOVED: %lu",
2f61710b DS	255	__PRETTY_FUNCTION__, pbrms->installed);
e5c83d9b DS	256	break;
	257	}
	258
38e9ccde DS	259	pbr_map_final_interface_deletion(pbrms->parent, pmi);
38e9ccde DS	260
e5c83d9b DS	261	return 0;
	262	}
	263
	264	static void zebra_connected(struct zclient *zclient)
	265	{
2f61710b DS	266	DEBUGD(&pbr_dbg_zebra, "%s: Registering for fun and profit",
2f61710b DS	267	__PRETTY_FUNCTION__);
e5c83d9b DS	268	zclient_send_reg_requests(zclient, VRF_DEFAULT);
	269	}
	270
	271	static void route_add_helper(struct zapi_route *api, struct nexthop_group nhg,
	272	uint8_t install_afi)
	273	{
	274	struct zapi_nexthop *api_nh;
2f61710b	275	char buf[PREFIX_STRLEN];
e5c83d9b DS	276	struct nexthop *nhop;
	277	int i;
	278
	279	api->prefix.family = install_afi;
	280
2f61710b DS	281	DEBUGD(&pbr_dbg_zebra, "\tEncoding %s",
	282	prefix2str(&api->prefix, buf, sizeof(buf)));
	283
e5c83d9b DS	284	i = 0;
	285	for (ALL_NEXTHOPS(nhg, nhop)) {
	286	api_nh = &api->nexthops[i];
	287	api_nh->vrf_id = nhop->vrf_id;
	288	api_nh->type = nhop->type;
	289	switch (nhop->type) {
	290	case NEXTHOP_TYPE_IPV4:
	291	api_nh->gate.ipv4 = nhop->gate.ipv4;
	292	break;
	293	case NEXTHOP_TYPE_IPV4_IFINDEX:
	294	api_nh->gate.ipv4 = nhop->gate.ipv4;
	295	api_nh->ifindex = nhop->ifindex;
	296	break;
	297	case NEXTHOP_TYPE_IFINDEX:
	298	api_nh->ifindex = nhop->ifindex;
	299	break;
	300	case NEXTHOP_TYPE_IPV6:
	301	memcpy(&api_nh->gate.ipv6, &nhop->gate.ipv6, 16);
	302	break;
	303	case NEXTHOP_TYPE_IPV6_IFINDEX:
	304	api_nh->ifindex = nhop->ifindex;
	305	memcpy(&api_nh->gate.ipv6, &nhop->gate.ipv6, 16);
	306	break;
	307	case NEXTHOP_TYPE_BLACKHOLE:
	308	api_nh->bh_type = nhop->bh_type;
	309	break;
	310	}
	311	i++;
	312	}
	313	api->nexthop_num = i;
	314
	315	zclient_route_send(ZEBRA_ROUTE_ADD, zclient, api);
	316	}
	317
	318	/*
	319	* This function assumes a default route is being
	320	* installed into the appropriate tableid
	321	*/
	322	void route_add(struct pbr_nexthop_group_cache *pnhgc, struct nexthop_group nhg,
	323	afi_t install_afi)
	324	{
	325	struct zapi_route api;
	326
2f61710b DS	327	DEBUGD(&pbr_dbg_zebra, "%s for Table: %d", __PRETTY_FUNCTION__,
	328	pnhgc->table_id);
	329
e5c83d9b DS	330	memset(&api, 0, sizeof(api));
	331
	332	api.vrf_id = VRF_DEFAULT;
	333	api.type = ZEBRA_ROUTE_PBR;
	334	api.safi = SAFI_UNICAST;
	335	/*
	336	* Sending a default route
	337	*/
	338	api.tableid = pnhgc->table_id;
	339	SET_FLAG(api.flags, ZEBRA_FLAG_ALLOW_RECURSION);
	340	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
	341	SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
	342	switch (install_afi) {
	343	case AFI_MAX:
	344	route_add_helper(&api, nhg, AF_INET);
	345	route_add_helper(&api, nhg, AF_INET6);
	346	break;
	347	case AFI_IP:
	348	route_add_helper(&api, nhg, AF_INET);
	349	break;
	350	case AFI_IP6:
	351	route_add_helper(&api, nhg, AF_INET6);
	352	break;
	353	case AFI_L2VPN:
	354	DEBUGD(&pbr_dbg_zebra,
	355	"%s: Asked to install unsupported route type: L2VPN",
	356	__PRETTY_FUNCTION__);
	357	break;
	358	}
	359	}
	360
	361	/*
	362	* This function assumes a default route is being
	363	* removed from the appropriate tableid
	364	*/
	365	void route_delete(struct pbr_nexthop_group_cache *pnhgc, afi_t afi)
	366	{
	367	struct zapi_route api;
	368
2f61710b DS	369	DEBUGD(&pbr_dbg_zebra, "%s for Table: %d", __PRETTY_FUNCTION__,
	370	pnhgc->table_id);
	371
e5c83d9b DS	372	memset(&api, 0, sizeof(api));
	373	api.vrf_id = VRF_DEFAULT;
	374	api.type = ZEBRA_ROUTE_PBR;
	375	api.safi = SAFI_UNICAST;
	376
	377	api.tableid = pnhgc->table_id;
	378	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
	379
	380	switch (afi) {
	381	case AFI_IP:
	382	api.prefix.family = AF_INET;
	383	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	384	break;
	385	case AFI_IP6:
	386	api.prefix.family = AF_INET6;
	387	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	388	break;
	389	case AFI_MAX:
	390	api.prefix.family = AF_INET;
	391	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	392	api.prefix.family = AF_INET6;
	393	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	394	break;
	395	case AFI_L2VPN:
	396	DEBUGD(&pbr_dbg_zebra,
	397	"%s: Asked to delete unsupported route type: L2VPN",
	398	__PRETTY_FUNCTION__);
	399	break;
	400	}
e5c83d9b DS	401	}
	402
	403	static int pbr_zebra_nexthop_update(int command, struct zclient *zclient,
	404	zebra_size_t length, vrf_id_t vrf_id)
	405	{
	406	struct zapi_route nhr;
	407	char buf[PREFIX2STR_BUFFER];
	408	uint32_t i;
	409
54317f2c A	410	if (!zapi_nexthop_update_decode(zclient->ibuf, &nhr)) {
	411	zlog_warn("Failure to decode Nexthop update message");
	412	return 0;
	413	}
e5c83d9b DS	414
	415	if (DEBUG_MODE_CHECK(&pbr_dbg_zebra, DEBUG_MODE_ALL)) {
	416
	417	DEBUGD(&pbr_dbg_zebra, "%s: Received Nexthop update: %s",
	418	__PRETTY_FUNCTION__,
	419	prefix2str(&nhr.prefix, buf, sizeof(buf)));
	420
	421	DEBUGD(&pbr_dbg_zebra, "%s: (\tNexthops(%u)",
	422	__PRETTY_FUNCTION__, nhr.nexthop_num);
	423
	424	for (i = 0; i < nhr.nexthop_num; i++) {
	425	DEBUGD(&pbr_dbg_zebra,
	426	"%s: \tType: %d: vrf: %d, ifindex: %d gate: %s",
	427	__PRETTY_FUNCTION__, nhr.nexthops[i].type,
	428	nhr.nexthops[i].vrf_id, nhr.nexthops[i].ifindex,
	429	inet_ntoa(nhr.nexthops[i].gate.ipv4));
	430	}
	431	}
	432
	433	pbr_nht_nexthop_update(&nhr);
	434	return 1;
	435	}
	436
	437	extern struct zebra_privs_t pbr_privs;
	438
	439	void pbr_zebra_init(void)
	440	{
	441	struct zclient_options opt = { .receive_notify = true };
	442
26f63a1e	443	zclient = zclient_new(master, &opt);
e5c83d9b DS	444
	445	zclient_init(zclient, ZEBRA_ROUTE_PBR, 0, &pbr_privs);
	446	zclient->zebra_connected = zebra_connected;
	447	zclient->interface_add = interface_add;
	448	zclient->interface_delete = interface_delete;
	449	zclient->interface_up = interface_state_up;
	450	zclient->interface_down = interface_state_down;
	451	zclient->interface_address_add = interface_address_add;
	452	zclient->interface_address_delete = interface_address_delete;
	453	zclient->route_notify_owner = route_notify_owner;
	454	zclient->rule_notify_owner = rule_notify_owner;
	455	zclient->nexthop_update = pbr_zebra_nexthop_update;
	456	}
	457
	458	void pbr_send_rnh(struct nexthop *nhop, bool reg)
	459	{
	460	uint32_t command;
	461	struct prefix p;
	462
	463	command = (reg) ?
	464	ZEBRA_NEXTHOP_REGISTER : ZEBRA_NEXTHOP_UNREGISTER;
	465
	466	memset(&p, 0, sizeof(p));
d3765386	467	switch (nhop->type) {
e5c83d9b DS	468	case NEXTHOP_TYPE_IFINDEX:
	469	case NEXTHOP_TYPE_BLACKHOLE:
	470	return;
	471	case NEXTHOP_TYPE_IPV4:
	472	case NEXTHOP_TYPE_IPV4_IFINDEX:
	473	p.family = AF_INET;
	474	p.u.prefix4.s_addr = nhop->gate.ipv4.s_addr;
	475	p.prefixlen = 32;
	476	break;
	477	case NEXTHOP_TYPE_IPV6:
	478	case NEXTHOP_TYPE_IPV6_IFINDEX:
	479	p.family = AF_INET6;
	480	memcpy(&p.u.prefix6, &nhop->gate.ipv6, 16);
	481	p.prefixlen = 128;
	482	break;
	483	}
	484
	485	if (zclient_send_rnh(zclient, command, &p,
	486	false, nhop->vrf_id) < 0) {
	487	zlog_warn("%s: Failure to send nexthop to zebra",
	488	__PRETTY_FUNCTION__);
	489	}
	490	}
	491
	492	static void pbr_encode_pbr_map_sequence_prefix(struct stream *s,
	493	struct prefix *p,
49027ce8	494	unsigned char family)
e5c83d9b DS	495	{
	496	struct prefix any;
	497
	498	if (!p) {
	499	memset(&any, 0, sizeof(any));
	500	any.family = family;
	501	p = &any;
	502	}
	503
	504	stream_putc(s, p->family);
	505	stream_putc(s, p->prefixlen);
	506	stream_put(s, &p->u.prefix, prefix_blen(p));
	507	}
	508
	509	static void pbr_encode_pbr_map_sequence(struct stream *s,
	510	struct pbr_map_sequence *pbrms,
	511	struct interface *ifp)
	512	{
49027ce8	513	unsigned char family;
e5c83d9b DS	514
e5c83d9b DS	515	family = AF_INET;
49027ce8 DS	516	if (pbrms->family)
49027ce8 DS	517	family = pbrms->family;
e5c83d9b DS	518
	519	stream_putl(s, pbrms->seqno);
	520	stream_putl(s, pbrms->ruleno);
	521	stream_putl(s, pbrms->unique);
	522	pbr_encode_pbr_map_sequence_prefix(s, pbrms->src, family);
	523	stream_putw(s, 0); /* src port */
	524	pbr_encode_pbr_map_sequence_prefix(s, pbrms->dst, family);
	525	stream_putw(s, 0); /* dst port */
614827f8	526	stream_putl(s, 0); /* fwmark */
e5c83d9b DS	527	if (pbrms->nhgrp_name)
	528	stream_putl(s, pbr_nht_get_table(pbrms->nhgrp_name));
	529	else if (pbrms->nhg)
	530	stream_putl(s, pbr_nht_get_table(pbrms->internal_nhg_name));
	531	stream_putl(s, ifp->ifindex);
	532	}
	533
b13e5ad6 DS	534	void pbr_send_pbr_map(struct pbr_map_sequence *pbrms,
b13e5ad6 DS	535	struct pbr_map_interface *pmi, bool install)
e5c83d9b	536	{
b13e5ad6	537	struct pbr_map *pbrm = pbrms->parent;
e5c83d9b	538	struct stream *s;
10a00758	539	uint64_t is_installed = (uint64_t)1 << pmi->install_bit;
37c606ff DS	540
37c606ff DS	541	is_installed &= pbrms->installed;
e5c83d9b	542
37c606ff DS	543	DEBUGD(&pbr_dbg_zebra, "%s: for %s %d(%" PRIu64 ")",
37c606ff DS	544	__PRETTY_FUNCTION__, pbrm->name, install, is_installed);
9b71ea4b DS	545
	546	/*
	547	* If we are installed and asked to do so again
	548	* just return. If we are not installed and asked
	549	* and asked to delete just return;
	550	*/
37c606ff	551	if (install && is_installed)
9b71ea4b DS	552	return;
9b71ea4b DS	553
37c606ff	554	if (!install && !is_installed)
9b71ea4b	555	return;
e5c83d9b DS	556
	557	s = zclient->obuf;
	558	stream_reset(s);
	559
	560	zclient_create_header(s,
	561	install ? ZEBRA_RULE_ADD : ZEBRA_RULE_DELETE,
	562	VRF_DEFAULT);
	563
b13e5ad6 DS	564	/*
	565	* We are sending one item at a time at the moment
	566	*/
	567	stream_putl(s, 1);
e5c83d9b	568
b13e5ad6 DS	569	DEBUGD(&pbr_dbg_zebra, "%s: \t%s %s %d %s %u",
	570	__PRETTY_FUNCTION__, install ? "Installing" : "Deleting",
	571	pbrm->name, install, pmi->ifp->name, pmi->delete);
e5c83d9b	572
b13e5ad6	573	pbr_encode_pbr_map_sequence(s, pbrms, pmi->ifp);
e5c83d9b	574
e5c83d9b DS	575	stream_putw_at(s, 0, stream_get_endp(s));
e5c83d9b DS	576
e5c83d9b DS	577	zclient_send_message(zclient);
e5c83d9b DS	578	}