[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;

	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;

	if_set_index(ifp, IFINDEX_INTERNAL);

	return 0;
}

static int interface_address_add(int command, struct zclient *zclient,
				 zebra_size_t length, vrf_id_t vrf_id)
{
	zebra_interface_address_read(command, zclient->ibuf, vrf_id);

	return 0;
}

static int interface_address_delete(int command, struct zclient *zclient,
				    zebra_size_t length, vrf_id_t vrf_id)
{
	struct connected *c;

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

	if (!c)
		return 0;

	connected_free(c);
	return 0;
}

static int interface_state_up(int command, struct zclient *zclient,
			      zebra_size_t length, vrf_id_t vrf_id)
{

	zebra_interface_state_read(zclient->ibuf, vrf_id);

	return 0;
}

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

	zebra_interface_state_read(zclient->ibuf, vrf_id);

	return 0;
}

static int route_notify_owner(int command, struct zclient *zclient,
			      zebra_size_t length, vrf_id_t vrf_id)
{
	struct prefix p;
	enum zapi_route_notify_owner note;
	uint32_t table_id;
	char buf[PREFIX_STRLEN];

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

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

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

	return 0;
}

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

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

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

	installed = 1 << pmi->install_bit;

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

	return 0;
}

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

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

	api->prefix.family = install_afi;

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

	zclient_route_send(ZEBRA_ROUTE_ADD, zclient, api);
}

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

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

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

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

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

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

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

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

	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
10a00758 DS	72	if (!ifp->info)
10a00758 DS	73	pbr_if_new(ifp);
e5c83d9b DS	74
	75	return 0;
	76	}
	77
	78	static int interface_delete(int command, struct zclient *zclient,
	79	zebra_size_t length, vrf_id_t vrf_id)
	80	{
	81	struct interface *ifp;
	82	struct stream *s;
	83
	84	s = zclient->ibuf;
	85	/* zebra_interface_state_read () updates interface structure in iflist
	86	*/
	87	ifp = zebra_interface_state_read(s, vrf_id);
	88
	89	if (ifp == NULL)
	90	return 0;
	91
	92	if_set_index(ifp, IFINDEX_INTERNAL);
	93
	94	return 0;
	95	}
	96
	97	static int interface_address_add(int command, struct zclient *zclient,
	98	zebra_size_t length, vrf_id_t vrf_id)
	99	{
	100	zebra_interface_address_read(command, zclient->ibuf, vrf_id);
	101
	102	return 0;
	103	}
	104
	105	static int interface_address_delete(int command, struct zclient *zclient,
	106	zebra_size_t length, vrf_id_t vrf_id)
	107	{
	108	struct connected *c;
	109
	110	c = zebra_interface_address_read(command, zclient->ibuf, vrf_id);
	111
	112	if (!c)
	113	return 0;
	114
	115	connected_free(c);
	116	return 0;
	117	}
	118
	119	static int interface_state_up(int command, struct zclient *zclient,
	120	zebra_size_t length, vrf_id_t vrf_id)
	121	{
	122
d7b3ad40	123	zebra_interface_state_read(zclient->ibuf, vrf_id);
e5c83d9b DS	124
	125	return 0;
	126	}
	127
	128	static int interface_state_down(int command, struct zclient *zclient,
	129	zebra_size_t length, vrf_id_t vrf_id)
	130	{
	131
	132	zebra_interface_state_read(zclient->ibuf, vrf_id);
	133
	134	return 0;
	135	}
	136
	137	static int route_notify_owner(int command, struct zclient *zclient,
	138	zebra_size_t length, vrf_id_t vrf_id)
	139	{
	140	struct prefix p;
	141	enum zapi_route_notify_owner note;
	142	uint32_t table_id;
	143	char buf[PREFIX_STRLEN];
	144
	145	prefix2str(&p, buf, sizeof(buf));
	146
	147	if (!zapi_route_notify_decode(zclient->ibuf, &p, &table_id, &note))
	148	return -1;
	149
	150	switch (note) {
	151	case ZAPI_ROUTE_FAIL_INSTALL:
	152	DEBUGD(&pbr_dbg_zebra,
	153	"%s: [%s] Route install failure for table: %u",
	154	__PRETTY_FUNCTION__, buf, table_id);
	155	break;
	156	case ZAPI_ROUTE_BETTER_ADMIN_WON:
	157	DEBUGD(&pbr_dbg_zebra,
	158	"%s: [%s] Route better admin distance won for table: %u",
	159	__PRETTY_FUNCTION__, buf, table_id);
	160	break;
	161	case ZAPI_ROUTE_INSTALLED:
	162	DEBUGD(&pbr_dbg_zebra,
	163	"%s: [%s] Route installed succeeded for table: %u",
	164	__PRETTY_FUNCTION__, buf, table_id);
	165	pbr_nht_route_installed_for_table(table_id);
	166	break;
	167	case ZAPI_ROUTE_REMOVED:
	168	DEBUGD(&pbr_dbg_zebra,
	169	"%s: [%s] Route Removed succeeded for table: %u",
	170	__PRETTY_FUNCTION__, buf, table_id);
	171	pbr_nht_route_removed_for_table(table_id);
	172	break;
	173	case ZAPI_ROUTE_REMOVE_FAIL:
	174	DEBUGD(&pbr_dbg_zebra,
	175	"%s: [%s] Route remove fail for table: %u",
	176	__PRETTY_FUNCTION__, buf, table_id);
	177	break;
	178	}
	179
	180	return 0;
	181	}
	182
	183	static int rule_notify_owner(int command, struct zclient *zclient,
	184	zebra_size_t length, vrf_id_t vrf_id)
	185	{
	186	uint32_t seqno, priority, unique;
	187	enum zapi_rule_notify_owner note;
188	struct pbr_map_sequence *pbrms;
37c606ff	189	struct pbr_map_interface *pmi;
e5c83d9b	190	ifindex_t ifi;
37c606ff	191	uint64_t installed;
e5c83d9b DS	192
	193	if (!zapi_rule_notify_decode(zclient->ibuf, &seqno, &priority, &unique,
	194	&ifi, &note))
	195	return -1;
	196
37c606ff DS	197	pmi = NULL;
37c606ff DS	198	pbrms = pbrms_lookup_unique(unique, ifi, &pmi);
e5c83d9b DS	199	if (!pbrms) {
	200	DEBUGD(&pbr_dbg_zebra,
	201	"%s: Failure to lookup pbrms based upon %u",
	202	__PRETTY_FUNCTION__, unique);
	203	return 0;
	204	}
	205
37c606ff DS	206	installed = 1 << pmi->install_bit;
37c606ff DS	207
e5c83d9b DS	208	switch (note) {
e5c83d9b DS	209	case ZAPI_RULE_FAIL_INSTALL:
0437e105	210	DEBUGD(&pbr_dbg_zebra, "%s: Received RULE_FAIL_INSTALL",
e5c83d9b	211	__PRETTY_FUNCTION__);
37c606ff	212	pbrms->installed &= ~installed;
e5c83d9b DS	213	break;
e5c83d9b DS	214	case ZAPI_RULE_INSTALLED:
37c606ff	215	pbrms->installed \|= installed;
0437e105	216	DEBUGD(&pbr_dbg_zebra, "%s: Received RULE_INSTALLED",
e5c83d9b DS	217	__PRETTY_FUNCTION__);
e5c83d9b DS	218	break;
373dd3b5	219	case ZAPI_RULE_FAIL_REMOVE:
e5c83d9b	220	case ZAPI_RULE_REMOVED:
0f03639d	221	pbrms->installed &= ~installed;
e5c83d9b DS	222	DEBUGD(&pbr_dbg_zebra, "%s: Received RULE REMOVED",
	223	__PRETTY_FUNCTION__);
	224	break;
	225	}
	226
	227	return 0;
	228	}
	229
	230	static void zebra_connected(struct zclient *zclient)
	231	{
	232	zclient_send_reg_requests(zclient, VRF_DEFAULT);
	233	}
	234
	235	static void route_add_helper(struct zapi_route *api, struct nexthop_group nhg,
	236	uint8_t install_afi)
	237	{
	238	struct zapi_nexthop *api_nh;
	239	struct nexthop *nhop;
	240	int i;
	241
	242	api->prefix.family = install_afi;
	243
	244	i = 0;
	245	for (ALL_NEXTHOPS(nhg, nhop)) {
	246	api_nh = &api->nexthops[i];
	247	api_nh->vrf_id = nhop->vrf_id;
	248	api_nh->type = nhop->type;
	249	switch (nhop->type) {
	250	case NEXTHOP_TYPE_IPV4:
	251	api_nh->gate.ipv4 = nhop->gate.ipv4;
	252	break;
	253	case NEXTHOP_TYPE_IPV4_IFINDEX:
	254	api_nh->gate.ipv4 = nhop->gate.ipv4;
	255	api_nh->ifindex = nhop->ifindex;
	256	break;
	257	case NEXTHOP_TYPE_IFINDEX:
	258	api_nh->ifindex = nhop->ifindex;
	259	break;
	260	case NEXTHOP_TYPE_IPV6:
	261	memcpy(&api_nh->gate.ipv6, &nhop->gate.ipv6, 16);
	262	break;
	263	case NEXTHOP_TYPE_IPV6_IFINDEX:
	264	api_nh->ifindex = nhop->ifindex;
	265	memcpy(&api_nh->gate.ipv6, &nhop->gate.ipv6, 16);
	266	break;
	267	case NEXTHOP_TYPE_BLACKHOLE:
	268	api_nh->bh_type = nhop->bh_type;
	269	break;
	270	}
	271	i++;
	272	}
	273	api->nexthop_num = i;
	274
	275	zclient_route_send(ZEBRA_ROUTE_ADD, zclient, api);
	276	}
	277
	278	/*
	279	* This function assumes a default route is being
	280	* installed into the appropriate tableid
	281	*/
	282	void route_add(struct pbr_nexthop_group_cache *pnhgc, struct nexthop_group nhg,
	283	afi_t install_afi)
	284	{
	285	struct zapi_route api;
286
287	memset(&api, 0, sizeof(api));
288
289	api.vrf_id = VRF_DEFAULT;
290	api.type = ZEBRA_ROUTE_PBR;
291	api.safi = SAFI_UNICAST;
292	/*
293	* Sending a default route
294	*/
295	api.tableid = pnhgc->table_id;
296	SET_FLAG(api.flags, ZEBRA_FLAG_ALLOW_RECURSION);
297	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
298	SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
299	switch (install_afi) {
300	case AFI_MAX:
301	route_add_helper(&api, nhg, AF_INET);
302	route_add_helper(&api, nhg, AF_INET6);
303	break;
304	case AFI_IP:
305	route_add_helper(&api, nhg, AF_INET);
306	break;
307	case AFI_IP6:
308	route_add_helper(&api, nhg, AF_INET6);
309	break;
310	case AFI_L2VPN:
311	DEBUGD(&pbr_dbg_zebra,
312	"%s: Asked to install unsupported route type: L2VPN",
313	__PRETTY_FUNCTION__);
314	break;
315	}
316	}
317
318	/*
319	* This function assumes a default route is being
320	* removed from the appropriate tableid
321	*/
322	void route_delete(struct pbr_nexthop_group_cache *pnhgc, afi_t afi)
323	{
324	struct zapi_route api;
325
326	memset(&api, 0, sizeof(api));
327	api.vrf_id = VRF_DEFAULT;
328	api.type = ZEBRA_ROUTE_PBR;
329	api.safi = SAFI_UNICAST;
330
331	api.tableid = pnhgc->table_id;
332	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
333
334	switch (afi) {
335	case AFI_IP:
336	api.prefix.family = AF_INET;
337	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
338	break;
339	case AFI_IP6:
340	api.prefix.family = AF_INET6;
341	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
342	break;
343	case AFI_MAX:
344	api.prefix.family = AF_INET;
345	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
346	api.prefix.family = AF_INET6;
347	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
348	break;
349	case AFI_L2VPN:
350	DEBUGD(&pbr_dbg_zebra,
351	"%s: Asked to delete unsupported route type: L2VPN",
352	__PRETTY_FUNCTION__);
353	break;
354	}
e5c83d9b DS	355	}
	356
	357	static int pbr_zebra_nexthop_update(int command, struct zclient *zclient,
	358	zebra_size_t length, vrf_id_t vrf_id)
	359	{
	360	struct zapi_route nhr;
	361	char buf[PREFIX2STR_BUFFER];
	362	uint32_t i;
	363
54317f2c A	364	if (!zapi_nexthop_update_decode(zclient->ibuf, &nhr)) {
	365	zlog_warn("Failure to decode Nexthop update message");
	366	return 0;
	367	}
e5c83d9b DS	368
	369	if (DEBUG_MODE_CHECK(&pbr_dbg_zebra, DEBUG_MODE_ALL)) {
	370
	371	DEBUGD(&pbr_dbg_zebra, "%s: Received Nexthop update: %s",
	372	__PRETTY_FUNCTION__,
	373	prefix2str(&nhr.prefix, buf, sizeof(buf)));
	374
	375	DEBUGD(&pbr_dbg_zebra, "%s: (\tNexthops(%u)",
	376	__PRETTY_FUNCTION__, nhr.nexthop_num);
	377
	378	for (i = 0; i < nhr.nexthop_num; i++) {
	379	DEBUGD(&pbr_dbg_zebra,
	380	"%s: \tType: %d: vrf: %d, ifindex: %d gate: %s",
	381	__PRETTY_FUNCTION__, nhr.nexthops[i].type,
	382	nhr.nexthops[i].vrf_id, nhr.nexthops[i].ifindex,
	383	inet_ntoa(nhr.nexthops[i].gate.ipv4));
	384	}
	385	}
	386
	387	pbr_nht_nexthop_update(&nhr);
	388	return 1;
	389	}
	390
	391	extern struct zebra_privs_t pbr_privs;
	392
	393	void pbr_zebra_init(void)
	394	{
	395	struct zclient_options opt = { .receive_notify = true };
	396
26f63a1e	397	zclient = zclient_new(master, &opt);
e5c83d9b DS	398
	399	zclient_init(zclient, ZEBRA_ROUTE_PBR, 0, &pbr_privs);
	400	zclient->zebra_connected = zebra_connected;
	401	zclient->interface_add = interface_add;
	402	zclient->interface_delete = interface_delete;
	403	zclient->interface_up = interface_state_up;
	404	zclient->interface_down = interface_state_down;
	405	zclient->interface_address_add = interface_address_add;
	406	zclient->interface_address_delete = interface_address_delete;
	407	zclient->route_notify_owner = route_notify_owner;
	408	zclient->rule_notify_owner = rule_notify_owner;
	409	zclient->nexthop_update = pbr_zebra_nexthop_update;
	410	}
	411
	412	void pbr_send_rnh(struct nexthop *nhop, bool reg)
	413	{
	414	uint32_t command;
	415	struct prefix p;
	416
	417	command = (reg) ?
	418	ZEBRA_NEXTHOP_REGISTER : ZEBRA_NEXTHOP_UNREGISTER;
	419
	420	memset(&p, 0, sizeof(p));
d3765386	421	switch (nhop->type) {
e5c83d9b DS	422	case NEXTHOP_TYPE_IFINDEX:
	423	case NEXTHOP_TYPE_BLACKHOLE:
	424	return;
	425	case NEXTHOP_TYPE_IPV4:
	426	case NEXTHOP_TYPE_IPV4_IFINDEX:
	427	p.family = AF_INET;
	428	p.u.prefix4.s_addr = nhop->gate.ipv4.s_addr;
	429	p.prefixlen = 32;
	430	break;
	431	case NEXTHOP_TYPE_IPV6:
	432	case NEXTHOP_TYPE_IPV6_IFINDEX:
	433	p.family = AF_INET6;
	434	memcpy(&p.u.prefix6, &nhop->gate.ipv6, 16);
	435	p.prefixlen = 128;
	436	break;
	437	}
	438
	439	if (zclient_send_rnh(zclient, command, &p,
	440	false, nhop->vrf_id) < 0) {
	441	zlog_warn("%s: Failure to send nexthop to zebra",
	442	__PRETTY_FUNCTION__);
	443	}
	444	}
	445
	446	static void pbr_encode_pbr_map_sequence_prefix(struct stream *s,
	447	struct prefix *p,
49027ce8	448	unsigned char family)
e5c83d9b DS	449	{
	450	struct prefix any;
	451
	452	if (!p) {
	453	memset(&any, 0, sizeof(any));
	454	any.family = family;
	455	p = &any;
	456	}
	457
	458	stream_putc(s, p->family);
	459	stream_putc(s, p->prefixlen);
	460	stream_put(s, &p->u.prefix, prefix_blen(p));
	461	}
	462
	463	static void pbr_encode_pbr_map_sequence(struct stream *s,
	464	struct pbr_map_sequence *pbrms,
	465	struct interface *ifp)
	466	{
49027ce8	467	unsigned char family;
e5c83d9b DS	468
e5c83d9b DS	469	family = AF_INET;
49027ce8 DS	470	if (pbrms->family)
49027ce8 DS	471	family = pbrms->family;
e5c83d9b DS	472
	473	stream_putl(s, pbrms->seqno);
	474	stream_putl(s, pbrms->ruleno);
	475	stream_putl(s, pbrms->unique);
	476	pbr_encode_pbr_map_sequence_prefix(s, pbrms->src, family);
	477	stream_putw(s, 0); /* src port */
	478	pbr_encode_pbr_map_sequence_prefix(s, pbrms->dst, family);
	479	stream_putw(s, 0); /* dst port */
614827f8	480	stream_putl(s, 0); /* fwmark */
e5c83d9b DS	481	if (pbrms->nhgrp_name)
	482	stream_putl(s, pbr_nht_get_table(pbrms->nhgrp_name));
	483	else if (pbrms->nhg)
	484	stream_putl(s, pbr_nht_get_table(pbrms->internal_nhg_name));
	485	stream_putl(s, ifp->ifindex);
	486	}
	487
b13e5ad6 DS	488	void pbr_send_pbr_map(struct pbr_map_sequence *pbrms,
b13e5ad6 DS	489	struct pbr_map_interface *pmi, bool install)
e5c83d9b	490	{
b13e5ad6	491	struct pbr_map *pbrm = pbrms->parent;
e5c83d9b	492	struct stream *s;
10a00758	493	uint64_t is_installed = (uint64_t)1 << pmi->install_bit;
37c606ff DS	494
37c606ff DS	495	is_installed &= pbrms->installed;
e5c83d9b	496
37c606ff DS	497	DEBUGD(&pbr_dbg_zebra, "%s: for %s %d(%" PRIu64 ")",
37c606ff DS	498	__PRETTY_FUNCTION__, pbrm->name, install, is_installed);
9b71ea4b DS	499
	500	/*
	501	* If we are installed and asked to do so again
	502	* just return. If we are not installed and asked
	503	* and asked to delete just return;
	504	*/
37c606ff	505	if (install && is_installed)
9b71ea4b DS	506	return;
9b71ea4b DS	507
37c606ff	508	if (!install && !is_installed)
9b71ea4b	509	return;
e5c83d9b DS	510
	511	s = zclient->obuf;
	512	stream_reset(s);
	513
	514	zclient_create_header(s,
	515	install ? ZEBRA_RULE_ADD : ZEBRA_RULE_DELETE,
	516	VRF_DEFAULT);
	517
b13e5ad6 DS	518	/*
	519	* We are sending one item at a time at the moment
	520	*/
	521	stream_putl(s, 1);
e5c83d9b	522
b13e5ad6 DS	523	DEBUGD(&pbr_dbg_zebra, "%s: \t%s %s %d %s %u",
	524	__PRETTY_FUNCTION__, install ? "Installing" : "Deleting",
	525	pbrm->name, install, pmi->ifp->name, pmi->delete);
e5c83d9b	526
b13e5ad6	527	pbr_encode_pbr_map_sequence(s, pbrms, pmi->ifp);
e5c83d9b	528
e5c83d9b DS	529	stream_putw_at(s, 0, stream_get_endp(s));
e5c83d9b DS	530
e5c83d9b DS	531	zclient_send_message(zclient);
e5c83d9b DS	532	}