[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);

	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);

	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);

	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;
	}

	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 DS	77
	78	return 0;
	79	}
	80
	81	static int interface_delete(int command, struct zclient *zclient,
	82	zebra_size_t length, vrf_id_t vrf_id)
	83	{
	84	struct interface *ifp;
	85	struct stream *s;
	86
	87	s = zclient->ibuf;
	88	/* zebra_interface_state_read () updates interface structure in iflist
	89	*/
	90	ifp = zebra_interface_state_read(s, vrf_id);
	91
	92	if (ifp == NULL)
	93	return 0;
	94
2f61710b DS	95	DEBUGD(&pbr_dbg_zebra,
	96	"%s: %s", __PRETTY_FUNCTION__, ifp->name);
	97
e5c83d9b DS	98	if_set_index(ifp, IFINDEX_INTERNAL);
	99
	100	return 0;
	101	}
	102
	103	static int interface_address_add(int command, struct zclient *zclient,
	104	zebra_size_t length, vrf_id_t vrf_id)
	105	{
2f61710b DS	106	struct connected *c;
	107	char buf[PREFIX_STRLEN];
	108
	109	c = zebra_interface_address_read(command, zclient->ibuf, vrf_id);
	110
	111	DEBUGD(&pbr_dbg_zebra,
	112	"%s: %s added %s", __PRETTY_FUNCTION__, c->ifp->name,
	113	prefix2str(c->address, buf, sizeof(buf)));
e5c83d9b DS	114
	115	return 0;
	116	}
	117
	118	static int interface_address_delete(int command, struct zclient *zclient,
	119	zebra_size_t length, vrf_id_t vrf_id)
	120	{
	121	struct connected *c;
2f61710b	122	char buf[PREFIX_STRLEN];
e5c83d9b DS	123
	124	c = zebra_interface_address_read(command, zclient->ibuf, vrf_id);
	125
	126	if (!c)
	127	return 0;
	128
2f61710b DS	129	DEBUGD(&pbr_dbg_zebra,
	130	"%s: %s deleted %s", __PRETTY_FUNCTION__, c->ifp->name,
	131	prefix2str(c->address, buf, sizeof(buf)));
	132
e5c83d9b DS	133	connected_free(c);
	134	return 0;
	135	}
	136
	137	static int interface_state_up(int command, struct zclient *zclient,
	138	zebra_size_t length, vrf_id_t vrf_id)
	139	{
2f61710b DS	140	struct interface *ifp;
	141
	142	ifp = zebra_interface_state_read(zclient->ibuf, vrf_id);
e5c83d9b	143
2f61710b DS	144	DEBUGD(&pbr_dbg_zebra,
2f61710b DS	145	"%s: %s is up", __PRETTY_FUNCTION__, ifp->name);
e5c83d9b DS	146
	147	return 0;
	148	}
	149
	150	static int interface_state_down(int command, struct zclient *zclient,
	151	zebra_size_t length, vrf_id_t vrf_id)
	152	{
2f61710b	153	struct interface *ifp;
e5c83d9b	154
2f61710b DS	155	ifp = zebra_interface_state_read(zclient->ibuf, vrf_id);
	156
	157	DEBUGD(&pbr_dbg_zebra,
	158	"%s: %s is down", __PRETTY_FUNCTION__, ifp->name);
e5c83d9b DS	159
	160	return 0;
	161	}
	162
	163	static int route_notify_owner(int command, struct zclient *zclient,
	164	zebra_size_t length, vrf_id_t vrf_id)
	165	{
	166	struct prefix p;
	167	enum zapi_route_notify_owner note;
	168	uint32_t table_id;
	169	char buf[PREFIX_STRLEN];
	170
e5c83d9b DS	171	if (!zapi_route_notify_decode(zclient->ibuf, &p, &table_id, &note))
	172	return -1;
	173
2f61710b DS	174	prefix2str(&p, buf, sizeof(buf));
2f61710b DS	175
e5c83d9b DS	176	switch (note) {
	177	case ZAPI_ROUTE_FAIL_INSTALL:
	178	DEBUGD(&pbr_dbg_zebra,
	179	"%s: [%s] Route install failure for table: %u",
	180	__PRETTY_FUNCTION__, buf, table_id);
	181	break;
	182	case ZAPI_ROUTE_BETTER_ADMIN_WON:
	183	DEBUGD(&pbr_dbg_zebra,
	184	"%s: [%s] Route better admin distance won for table: %u",
	185	__PRETTY_FUNCTION__, buf, table_id);
	186	break;
	187	case ZAPI_ROUTE_INSTALLED:
	188	DEBUGD(&pbr_dbg_zebra,
	189	"%s: [%s] Route installed succeeded for table: %u",
	190	__PRETTY_FUNCTION__, buf, table_id);
	191	pbr_nht_route_installed_for_table(table_id);
	192	break;
	193	case ZAPI_ROUTE_REMOVED:
	194	DEBUGD(&pbr_dbg_zebra,
	195	"%s: [%s] Route Removed succeeded for table: %u",
	196	__PRETTY_FUNCTION__, buf, table_id);
	197	pbr_nht_route_removed_for_table(table_id);
	198	break;
	199	case ZAPI_ROUTE_REMOVE_FAIL:
	200	DEBUGD(&pbr_dbg_zebra,
	201	"%s: [%s] Route remove fail for table: %u",
	202	__PRETTY_FUNCTION__, buf, table_id);
	203	break;
	204	}
	205
	206	return 0;
	207	}
	208
	209	static int rule_notify_owner(int command, struct zclient *zclient,
	210	zebra_size_t length, vrf_id_t vrf_id)
	211	{
	212	uint32_t seqno, priority, unique;
	213	enum zapi_rule_notify_owner note;
	214	struct pbr_map_sequence *pbrms;
37c606ff	215	struct pbr_map_interface *pmi;
e5c83d9b	216	ifindex_t ifi;
37c606ff	217	uint64_t installed;
e5c83d9b DS	218
	219	if (!zapi_rule_notify_decode(zclient->ibuf, &seqno, &priority, &unique,
	220	&ifi, &note))
	221	return -1;
	222
37c606ff DS	223	pmi = NULL;
37c606ff DS	224	pbrms = pbrms_lookup_unique(unique, ifi, &pmi);
e5c83d9b DS	225	if (!pbrms) {
	226	DEBUGD(&pbr_dbg_zebra,
	227	"%s: Failure to lookup pbrms based upon %u",
	228	__PRETTY_FUNCTION__, unique);
	229	return 0;
	230	}
	231
37c606ff DS	232	installed = 1 << pmi->install_bit;
37c606ff DS	233
e5c83d9b DS	234	switch (note) {
e5c83d9b DS	235	case ZAPI_RULE_FAIL_INSTALL:
37c606ff	236	pbrms->installed &= ~installed;
2f61710b DS	237	DEBUGD(&pbr_dbg_zebra, "%s: Received RULE_FAIL_INSTALL: %lu",
2f61710b DS	238	__PRETTY_FUNCTION__, pbrms->installed);
e5c83d9b DS	239	break;
e5c83d9b DS	240	case ZAPI_RULE_INSTALLED:
37c606ff	241	pbrms->installed \|= installed;
2f61710b DS	242	DEBUGD(&pbr_dbg_zebra, "%s: Received RULE_INSTALLED: %lu",
2f61710b DS	243	__PRETTY_FUNCTION__, pbrms->installed);
e5c83d9b	244	break;
373dd3b5	245	case ZAPI_RULE_FAIL_REMOVE:
e5c83d9b	246	case ZAPI_RULE_REMOVED:
0f03639d	247	pbrms->installed &= ~installed;
2f61710b DS	248	DEBUGD(&pbr_dbg_zebra, "%s: Received RULE REMOVED: %lu",
2f61710b DS	249	__PRETTY_FUNCTION__, pbrms->installed);
e5c83d9b DS	250	break;
	251	}
	252
	253	return 0;
	254	}
	255
	256	static void zebra_connected(struct zclient *zclient)
	257	{
2f61710b DS	258	DEBUGD(&pbr_dbg_zebra, "%s: Registering for fun and profit",
2f61710b DS	259	__PRETTY_FUNCTION__);
e5c83d9b DS	260	zclient_send_reg_requests(zclient, VRF_DEFAULT);
	261	}
	262
	263	static void route_add_helper(struct zapi_route *api, struct nexthop_group nhg,
	264	uint8_t install_afi)
	265	{
	266	struct zapi_nexthop *api_nh;
2f61710b	267	char buf[PREFIX_STRLEN];
e5c83d9b DS	268	struct nexthop *nhop;
	269	int i;
	270
	271	api->prefix.family = install_afi;
	272
2f61710b DS	273	DEBUGD(&pbr_dbg_zebra, "\tEncoding %s",
	274	prefix2str(&api->prefix, buf, sizeof(buf)));
	275
e5c83d9b DS	276	i = 0;
	277	for (ALL_NEXTHOPS(nhg, nhop)) {
	278	api_nh = &api->nexthops[i];
	279	api_nh->vrf_id = nhop->vrf_id;
	280	api_nh->type = nhop->type;
	281	switch (nhop->type) {
	282	case NEXTHOP_TYPE_IPV4:
	283	api_nh->gate.ipv4 = nhop->gate.ipv4;
	284	break;
	285	case NEXTHOP_TYPE_IPV4_IFINDEX:
	286	api_nh->gate.ipv4 = nhop->gate.ipv4;
	287	api_nh->ifindex = nhop->ifindex;
	288	break;
	289	case NEXTHOP_TYPE_IFINDEX:
	290	api_nh->ifindex = nhop->ifindex;
	291	break;
	292	case NEXTHOP_TYPE_IPV6:
	293	memcpy(&api_nh->gate.ipv6, &nhop->gate.ipv6, 16);
	294	break;
	295	case NEXTHOP_TYPE_IPV6_IFINDEX:
	296	api_nh->ifindex = nhop->ifindex;
	297	memcpy(&api_nh->gate.ipv6, &nhop->gate.ipv6, 16);
	298	break;
	299	case NEXTHOP_TYPE_BLACKHOLE:
	300	api_nh->bh_type = nhop->bh_type;
	301	break;
	302	}
	303	i++;
	304	}
	305	api->nexthop_num = i;
	306
	307	zclient_route_send(ZEBRA_ROUTE_ADD, zclient, api);
	308	}
	309
	310	/*
	311	* This function assumes a default route is being
	312	* installed into the appropriate tableid
	313	*/
	314	void route_add(struct pbr_nexthop_group_cache *pnhgc, struct nexthop_group nhg,
	315	afi_t install_afi)
	316	{
	317	struct zapi_route api;
	318
2f61710b DS	319	DEBUGD(&pbr_dbg_zebra, "%s for Table: %d", __PRETTY_FUNCTION__,
	320	pnhgc->table_id);
	321
e5c83d9b DS	322	memset(&api, 0, sizeof(api));
	323
	324	api.vrf_id = VRF_DEFAULT;
	325	api.type = ZEBRA_ROUTE_PBR;
	326	api.safi = SAFI_UNICAST;
	327	/*
	328	* Sending a default route
	329	*/
	330	api.tableid = pnhgc->table_id;
	331	SET_FLAG(api.flags, ZEBRA_FLAG_ALLOW_RECURSION);
	332	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
	333	SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
	334	switch (install_afi) {
	335	case AFI_MAX:
	336	route_add_helper(&api, nhg, AF_INET);
	337	route_add_helper(&api, nhg, AF_INET6);
	338	break;
	339	case AFI_IP:
	340	route_add_helper(&api, nhg, AF_INET);
	341	break;
	342	case AFI_IP6:
	343	route_add_helper(&api, nhg, AF_INET6);
	344	break;
	345	case AFI_L2VPN:
	346	DEBUGD(&pbr_dbg_zebra,
	347	"%s: Asked to install unsupported route type: L2VPN",
	348	__PRETTY_FUNCTION__);
	349	break;
	350	}
	351	}
	352
	353	/*
	354	* This function assumes a default route is being
	355	* removed from the appropriate tableid
	356	*/
	357	void route_delete(struct pbr_nexthop_group_cache *pnhgc, afi_t afi)
	358	{
	359	struct zapi_route api;
	360
2f61710b DS	361	DEBUGD(&pbr_dbg_zebra, "%s for Table: %d", __PRETTY_FUNCTION__,
	362	pnhgc->table_id);
	363
e5c83d9b DS	364	memset(&api, 0, sizeof(api));
	365	api.vrf_id = VRF_DEFAULT;
	366	api.type = ZEBRA_ROUTE_PBR;
	367	api.safi = SAFI_UNICAST;
	368
	369	api.tableid = pnhgc->table_id;
	370	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
	371
	372	switch (afi) {
	373	case AFI_IP:
	374	api.prefix.family = AF_INET;
	375	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	376	break;
	377	case AFI_IP6:
	378	api.prefix.family = AF_INET6;
	379	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	380	break;
	381	case AFI_MAX:
	382	api.prefix.family = AF_INET;
	383	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	384	api.prefix.family = AF_INET6;
	385	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	386	break;
	387	case AFI_L2VPN:
	388	DEBUGD(&pbr_dbg_zebra,
	389	"%s: Asked to delete unsupported route type: L2VPN",
	390	__PRETTY_FUNCTION__);
	391	break;
	392	}
e5c83d9b DS	393	}
	394
	395	static int pbr_zebra_nexthop_update(int command, struct zclient *zclient,
	396	zebra_size_t length, vrf_id_t vrf_id)
	397	{
	398	struct zapi_route nhr;
	399	char buf[PREFIX2STR_BUFFER];
	400	uint32_t i;
	401
54317f2c A	402	if (!zapi_nexthop_update_decode(zclient->ibuf, &nhr)) {
	403	zlog_warn("Failure to decode Nexthop update message");
	404	return 0;
	405	}
e5c83d9b DS	406
	407	if (DEBUG_MODE_CHECK(&pbr_dbg_zebra, DEBUG_MODE_ALL)) {
	408
	409	DEBUGD(&pbr_dbg_zebra, "%s: Received Nexthop update: %s",
	410	__PRETTY_FUNCTION__,
	411	prefix2str(&nhr.prefix, buf, sizeof(buf)));
	412
	413	DEBUGD(&pbr_dbg_zebra, "%s: (\tNexthops(%u)",
	414	__PRETTY_FUNCTION__, nhr.nexthop_num);
	415
	416	for (i = 0; i < nhr.nexthop_num; i++) {
	417	DEBUGD(&pbr_dbg_zebra,
	418	"%s: \tType: %d: vrf: %d, ifindex: %d gate: %s",
	419	__PRETTY_FUNCTION__, nhr.nexthops[i].type,
	420	nhr.nexthops[i].vrf_id, nhr.nexthops[i].ifindex,
	421	inet_ntoa(nhr.nexthops[i].gate.ipv4));
	422	}
	423	}
	424
	425	pbr_nht_nexthop_update(&nhr);
	426	return 1;
	427	}
	428
	429	extern struct zebra_privs_t pbr_privs;
	430
	431	void pbr_zebra_init(void)
	432	{
	433	struct zclient_options opt = { .receive_notify = true };
	434
26f63a1e	435	zclient = zclient_new(master, &opt);
e5c83d9b DS	436
	437	zclient_init(zclient, ZEBRA_ROUTE_PBR, 0, &pbr_privs);
	438	zclient->zebra_connected = zebra_connected;
	439	zclient->interface_add = interface_add;
	440	zclient->interface_delete = interface_delete;
	441	zclient->interface_up = interface_state_up;
	442	zclient->interface_down = interface_state_down;
	443	zclient->interface_address_add = interface_address_add;
	444	zclient->interface_address_delete = interface_address_delete;
	445	zclient->route_notify_owner = route_notify_owner;
	446	zclient->rule_notify_owner = rule_notify_owner;
	447	zclient->nexthop_update = pbr_zebra_nexthop_update;
	448	}
	449
	450	void pbr_send_rnh(struct nexthop *nhop, bool reg)
	451	{
	452	uint32_t command;
	453	struct prefix p;
	454
	455	command = (reg) ?
	456	ZEBRA_NEXTHOP_REGISTER : ZEBRA_NEXTHOP_UNREGISTER;
	457
	458	memset(&p, 0, sizeof(p));
d3765386	459	switch (nhop->type) {
e5c83d9b DS	460	case NEXTHOP_TYPE_IFINDEX:
	461	case NEXTHOP_TYPE_BLACKHOLE:
	462	return;
	463	case NEXTHOP_TYPE_IPV4:
	464	case NEXTHOP_TYPE_IPV4_IFINDEX:
	465	p.family = AF_INET;
	466	p.u.prefix4.s_addr = nhop->gate.ipv4.s_addr;
	467	p.prefixlen = 32;
	468	break;
	469	case NEXTHOP_TYPE_IPV6:
	470	case NEXTHOP_TYPE_IPV6_IFINDEX:
	471	p.family = AF_INET6;
	472	memcpy(&p.u.prefix6, &nhop->gate.ipv6, 16);
	473	p.prefixlen = 128;
	474	break;
	475	}
	476
	477	if (zclient_send_rnh(zclient, command, &p,
	478	false, nhop->vrf_id) < 0) {
	479	zlog_warn("%s: Failure to send nexthop to zebra",
	480	__PRETTY_FUNCTION__);
	481	}
	482	}
	483
	484	static void pbr_encode_pbr_map_sequence_prefix(struct stream *s,
	485	struct prefix *p,
49027ce8	486	unsigned char family)
e5c83d9b DS	487	{
	488	struct prefix any;
	489
	490	if (!p) {
	491	memset(&any, 0, sizeof(any));
	492	any.family = family;
	493	p = &any;
	494	}
	495
	496	stream_putc(s, p->family);
	497	stream_putc(s, p->prefixlen);
	498	stream_put(s, &p->u.prefix, prefix_blen(p));
	499	}
	500
	501	static void pbr_encode_pbr_map_sequence(struct stream *s,
	502	struct pbr_map_sequence *pbrms,
	503	struct interface *ifp)
	504	{
49027ce8	505	unsigned char family;
e5c83d9b DS	506
e5c83d9b DS	507	family = AF_INET;
49027ce8 DS	508	if (pbrms->family)
49027ce8 DS	509	family = pbrms->family;
e5c83d9b DS	510
	511	stream_putl(s, pbrms->seqno);
	512	stream_putl(s, pbrms->ruleno);
	513	stream_putl(s, pbrms->unique);
	514	pbr_encode_pbr_map_sequence_prefix(s, pbrms->src, family);
	515	stream_putw(s, 0); /* src port */
	516	pbr_encode_pbr_map_sequence_prefix(s, pbrms->dst, family);
	517	stream_putw(s, 0); /* dst port */
614827f8	518	stream_putl(s, 0); /* fwmark */
e5c83d9b DS	519	if (pbrms->nhgrp_name)
	520	stream_putl(s, pbr_nht_get_table(pbrms->nhgrp_name));
	521	else if (pbrms->nhg)
	522	stream_putl(s, pbr_nht_get_table(pbrms->internal_nhg_name));
	523	stream_putl(s, ifp->ifindex);
	524	}
	525
b13e5ad6 DS	526	void pbr_send_pbr_map(struct pbr_map_sequence *pbrms,
b13e5ad6 DS	527	struct pbr_map_interface *pmi, bool install)
e5c83d9b	528	{
b13e5ad6	529	struct pbr_map *pbrm = pbrms->parent;
e5c83d9b	530	struct stream *s;
10a00758	531	uint64_t is_installed = (uint64_t)1 << pmi->install_bit;
37c606ff DS	532
37c606ff DS	533	is_installed &= pbrms->installed;
e5c83d9b	534
37c606ff DS	535	DEBUGD(&pbr_dbg_zebra, "%s: for %s %d(%" PRIu64 ")",
37c606ff DS	536	__PRETTY_FUNCTION__, pbrm->name, install, is_installed);
9b71ea4b DS	537
	538	/*
	539	* If we are installed and asked to do so again
	540	* just return. If we are not installed and asked
	541	* and asked to delete just return;
	542	*/
37c606ff	543	if (install && is_installed)
9b71ea4b DS	544	return;
9b71ea4b DS	545
37c606ff	546	if (!install && !is_installed)
9b71ea4b	547	return;
e5c83d9b DS	548
	549	s = zclient->obuf;
	550	stream_reset(s);
	551
	552	zclient_create_header(s,
	553	install ? ZEBRA_RULE_ADD : ZEBRA_RULE_DELETE,
	554	VRF_DEFAULT);
	555
b13e5ad6 DS	556	/*
	557	* We are sending one item at a time at the moment
	558	*/
	559	stream_putl(s, 1);
e5c83d9b	560
b13e5ad6 DS	561	DEBUGD(&pbr_dbg_zebra, "%s: \t%s %s %d %s %u",
	562	__PRETTY_FUNCTION__, install ? "Installing" : "Deleting",
	563	pbrm->name, install, pmi->ifp->name, pmi->delete);
e5c83d9b	564
b13e5ad6	565	pbr_encode_pbr_map_sequence(s, pbrms, pmi->ifp);
e5c83d9b	566
e5c83d9b DS	567	stream_putw_at(s, 0, stream_get_endp(s));
e5c83d9b DS	568
e5c83d9b DS	569	zclient_send_message(zclient);
e5c83d9b DS	570	}