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

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

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

	return 0;
}

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

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

	if (!c)
		return 0;

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

	connected_free(c);
	return 0;
}

static int interface_state_up(ZAPI_CALLBACK_ARGS)
{
	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(ZAPI_CALLBACK_ARGS)
{
	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(ZAPI_CALLBACK_ARGS)
{
	struct prefix p;
	enum zapi_route_notify_owner note;
	uint32_t table_id;
	char buf[PREFIX_STRLEN];

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

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

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

	return 0;
}

static int rule_notify_owner(ZAPI_CALLBACK_ARGS)
{
	uint32_t seqno, priority, unique;
	enum zapi_rule_notify_owner note;
	struct pbr_map_sequence *pbrms;
	struct pbr_map_interface *pmi;
	ifindex_t ifi;
	uint64_t installed;

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

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

	installed = 1 << pmi->install_bit;

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

	pbr_map_final_interface_deletion(pbrms->parent, pmi);

	return 0;
}

static void zebra_connected(struct zclient *zclient)
{
	DEBUGD(&pbr_dbg_zebra, "%s: Registering for fun and profit",
	       __PRETTY_FUNCTION__);
	zclient_send_reg_requests(zclient, VRF_DEFAULT);
}

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

	api->prefix.family = install_afi;

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

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

	zclient_route_send(ZEBRA_ROUTE_ADD, zclient, api);
}

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

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

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

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

/*
 * 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(ZAPI_CALLBACK_ARGS)
{
	struct zapi_route nhr;
	char buf[PREFIX2STR_BUFFER];
	uint32_t i;

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

	if (DEBUG_MODE_CHECK(&pbr_dbg_zebra, DEBUG_MODE_ALL)) {

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

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

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

	pbr_nht_nexthop_update(&nhr);
	return 1;
}

extern struct zebra_privs_t pbr_privs;

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

	zclient = zclient_new(master, &opt);

	zclient_init(zclient, ZEBRA_ROUTE_PBR, 0, &pbr_privs);
	zclient->zebra_connected = zebra_connected;
	zclient->interface_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. */
121f9dee	62	static int interface_add(ZAPI_CALLBACK_ARGS)
e5c83d9b DS	63	{
	64	struct interface *ifp;
	65
	66	ifp = zebra_interface_add_read(zclient->ibuf, vrf_id);
	67
	68	if (!ifp)
	69	return 0;
	70
2f61710b DS	71	DEBUGD(&pbr_dbg_zebra,
	72	"%s: %s", __PRETTY_FUNCTION__, ifp->name);
	73
10a00758 DS	74	if (!ifp->info)
10a00758 DS	75	pbr_if_new(ifp);
e5c83d9b	76
a106a408 RW	77	pbr_nht_nexthop_interface_update(ifp);
a106a408 RW	78
e5c83d9b DS	79	return 0;
	80	}
	81
121f9dee	82	static int interface_delete(ZAPI_CALLBACK_ARGS)
e5c83d9b DS	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
121f9dee	103	static int interface_address_add(ZAPI_CALLBACK_ARGS)
e5c83d9b	104	{
2f61710b DS	105	struct connected *c;
	106	char buf[PREFIX_STRLEN];
	107
121f9dee	108	c = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
2f61710b DS	109
2f61710b DS	110	DEBUGD(&pbr_dbg_zebra,
964c3dba DS	111	"%s: %s added %s", __PRETTY_FUNCTION__,
	112	c ? c->ifp->name : "Unknown",
	113	c ? prefix2str(c->address, buf, sizeof(buf)) : "Unknown");
e5c83d9b DS	114
	115	return 0;
	116	}
	117
121f9dee	118	static int interface_address_delete(ZAPI_CALLBACK_ARGS)
e5c83d9b DS	119	{
e5c83d9b DS	120	struct connected *c;
2f61710b	121	char buf[PREFIX_STRLEN];
e5c83d9b	122
121f9dee	123	c = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
e5c83d9b DS	124
	125	if (!c)
	126	return 0;
	127
2f61710b DS	128	DEBUGD(&pbr_dbg_zebra,
	129	"%s: %s deleted %s", __PRETTY_FUNCTION__, c->ifp->name,
	130	prefix2str(c->address, buf, sizeof(buf)));
	131
e5c83d9b DS	132	connected_free(c);
	133	return 0;
	134	}
	135
121f9dee	136	static int interface_state_up(ZAPI_CALLBACK_ARGS)
e5c83d9b	137	{
2f61710b DS	138	struct interface *ifp;
	139
	140	ifp = zebra_interface_state_read(zclient->ibuf, vrf_id);
e5c83d9b	141
2f61710b DS	142	DEBUGD(&pbr_dbg_zebra,
2f61710b DS	143	"%s: %s is up", __PRETTY_FUNCTION__, ifp->name);
e5c83d9b	144
a106a408 RW	145	pbr_nht_nexthop_interface_update(ifp);
a106a408 RW	146
e5c83d9b DS	147	return 0;
	148	}
	149
121f9dee	150	static int interface_state_down(ZAPI_CALLBACK_ARGS)
e5c83d9b	151	{
2f61710b	152	struct interface *ifp;
e5c83d9b	153
2f61710b DS	154	ifp = zebra_interface_state_read(zclient->ibuf, vrf_id);
	155
	156	DEBUGD(&pbr_dbg_zebra,
	157	"%s: %s is down", __PRETTY_FUNCTION__, ifp->name);
e5c83d9b	158
a106a408 RW	159	pbr_nht_nexthop_interface_update(ifp);
a106a408 RW	160
e5c83d9b DS	161	return 0;
	162	}
	163
121f9dee	164	static int route_notify_owner(ZAPI_CALLBACK_ARGS)
e5c83d9b DS	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
121f9dee	209	static int rule_notify_owner(ZAPI_CALLBACK_ARGS)
e5c83d9b DS	210	{
	211	uint32_t seqno, priority, unique;
	212	enum zapi_rule_notify_owner note;
	213	struct pbr_map_sequence *pbrms;
37c606ff	214	struct pbr_map_interface *pmi;
e5c83d9b	215	ifindex_t ifi;
37c606ff	216	uint64_t installed;
e5c83d9b DS	217
	218	if (!zapi_rule_notify_decode(zclient->ibuf, &seqno, &priority, &unique,
	219	&ifi, &note))
	220	return -1;
	221
37c606ff DS	222	pmi = NULL;
37c606ff DS	223	pbrms = pbrms_lookup_unique(unique, ifi, &pmi);
e5c83d9b DS	224	if (!pbrms) {
	225	DEBUGD(&pbr_dbg_zebra,
	226	"%s: Failure to lookup pbrms based upon %u",
	227	__PRETTY_FUNCTION__, unique);
	228	return 0;
	229	}
	230
37c606ff DS	231	installed = 1 << pmi->install_bit;
37c606ff DS	232
e5c83d9b DS	233	switch (note) {
e5c83d9b DS	234	case ZAPI_RULE_FAIL_INSTALL:
37c606ff	235	pbrms->installed &= ~installed;
fa0069c6 DS	236	DEBUGD(&pbr_dbg_zebra,
fa0069c6 DS	237	"%s: Received RULE_FAIL_INSTALL: %" PRIu64,
2f61710b	238	__PRETTY_FUNCTION__, pbrms->installed);
e5c83d9b DS	239	break;
e5c83d9b DS	240	case ZAPI_RULE_INSTALLED:
37c606ff	241	pbrms->installed \|= installed;
fa0069c6	242	DEBUGD(&pbr_dbg_zebra, "%s: Received RULE_INSTALLED: %" PRIu64,
2f61710b	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;
fa0069c6	248	DEBUGD(&pbr_dbg_zebra, "%s: Received RULE REMOVED: %" PRIu64,
2f61710b	249	__PRETTY_FUNCTION__, pbrms->installed);
e5c83d9b DS	250	break;
	251	}
	252
38e9ccde DS	253	pbr_map_final_interface_deletion(pbrms->parent, pmi);
38e9ccde DS	254
e5c83d9b DS	255	return 0;
	256	}
	257
	258	static void zebra_connected(struct zclient *zclient)
	259	{
2f61710b DS	260	DEBUGD(&pbr_dbg_zebra, "%s: Registering for fun and profit",
2f61710b DS	261	__PRETTY_FUNCTION__);
e5c83d9b DS	262	zclient_send_reg_requests(zclient, VRF_DEFAULT);
	263	}
	264
	265	static void route_add_helper(struct zapi_route *api, struct nexthop_group nhg,
	266	uint8_t install_afi)
	267	{
	268	struct zapi_nexthop *api_nh;
2f61710b	269	char buf[PREFIX_STRLEN];
e5c83d9b DS	270	struct nexthop *nhop;
	271	int i;
	272
	273	api->prefix.family = install_afi;
	274
2f61710b DS	275	DEBUGD(&pbr_dbg_zebra, "\tEncoding %s",
	276	prefix2str(&api->prefix, buf, sizeof(buf)));
	277
e5c83d9b DS	278	i = 0;
	279	for (ALL_NEXTHOPS(nhg, nhop)) {
	280	api_nh = &api->nexthops[i];
	281	api_nh->vrf_id = nhop->vrf_id;
	282	api_nh->type = nhop->type;
	283	switch (nhop->type) {
	284	case NEXTHOP_TYPE_IPV4:
	285	api_nh->gate.ipv4 = nhop->gate.ipv4;
	286	break;
	287	case NEXTHOP_TYPE_IPV4_IFINDEX:
	288	api_nh->gate.ipv4 = nhop->gate.ipv4;
	289	api_nh->ifindex = nhop->ifindex;
	290	break;
	291	case NEXTHOP_TYPE_IFINDEX:
	292	api_nh->ifindex = nhop->ifindex;
	293	break;
	294	case NEXTHOP_TYPE_IPV6:
	295	memcpy(&api_nh->gate.ipv6, &nhop->gate.ipv6, 16);
	296	break;
	297	case NEXTHOP_TYPE_IPV6_IFINDEX:
	298	api_nh->ifindex = nhop->ifindex;
	299	memcpy(&api_nh->gate.ipv6, &nhop->gate.ipv6, 16);
	300	break;
	301	case NEXTHOP_TYPE_BLACKHOLE:
	302	api_nh->bh_type = nhop->bh_type;
	303	break;
	304	}
	305	i++;
	306	}
	307	api->nexthop_num = i;
	308
	309	zclient_route_send(ZEBRA_ROUTE_ADD, zclient, api);
	310	}
	311
	312	/*
	313	* This function assumes a default route is being
	314	* installed into the appropriate tableid
	315	*/
	316	void route_add(struct pbr_nexthop_group_cache *pnhgc, struct nexthop_group nhg,
	317	afi_t install_afi)
	318	{
	319	struct zapi_route api;
	320
2f61710b DS	321	DEBUGD(&pbr_dbg_zebra, "%s for Table: %d", __PRETTY_FUNCTION__,
	322	pnhgc->table_id);
	323
e5c83d9b DS	324	memset(&api, 0, sizeof(api));
	325
	326	api.vrf_id = VRF_DEFAULT;
	327	api.type = ZEBRA_ROUTE_PBR;
	328	api.safi = SAFI_UNICAST;
	329	/*
	330	* Sending a default route
	331	*/
	332	api.tableid = pnhgc->table_id;
	333	SET_FLAG(api.flags, ZEBRA_FLAG_ALLOW_RECURSION);
	334	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
	335	SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
	336	switch (install_afi) {
	337	case AFI_MAX:
	338	route_add_helper(&api, nhg, AF_INET);
	339	route_add_helper(&api, nhg, AF_INET6);
	340	break;
	341	case AFI_IP:
	342	route_add_helper(&api, nhg, AF_INET);
	343	break;
	344	case AFI_IP6:
	345	route_add_helper(&api, nhg, AF_INET6);
	346	break;
	347	case AFI_L2VPN:
	348	DEBUGD(&pbr_dbg_zebra,
	349	"%s: Asked to install unsupported route type: L2VPN",
	350	__PRETTY_FUNCTION__);
	351	break;
	352	}
	353	}
	354
	355	/*
	356	* This function assumes a default route is being
	357	* removed from the appropriate tableid
	358	*/
	359	void route_delete(struct pbr_nexthop_group_cache *pnhgc, afi_t afi)
	360	{
	361	struct zapi_route api;
	362
2f61710b DS	363	DEBUGD(&pbr_dbg_zebra, "%s for Table: %d", __PRETTY_FUNCTION__,
	364	pnhgc->table_id);
	365
e5c83d9b DS	366	memset(&api, 0, sizeof(api));
	367	api.vrf_id = VRF_DEFAULT;
	368	api.type = ZEBRA_ROUTE_PBR;
	369	api.safi = SAFI_UNICAST;
	370
	371	api.tableid = pnhgc->table_id;
	372	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
	373
	374	switch (afi) {
	375	case AFI_IP:
	376	api.prefix.family = AF_INET;
	377	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	378	break;
	379	case AFI_IP6:
	380	api.prefix.family = AF_INET6;
	381	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	382	break;
	383	case AFI_MAX:
	384	api.prefix.family = AF_INET;
	385	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	386	api.prefix.family = AF_INET6;
	387	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	388	break;
	389	case AFI_L2VPN:
	390	DEBUGD(&pbr_dbg_zebra,
	391	"%s: Asked to delete unsupported route type: L2VPN",
	392	__PRETTY_FUNCTION__);
	393	break;
	394	}
e5c83d9b DS	395	}
e5c83d9b DS	396
121f9dee	397	static int pbr_zebra_nexthop_update(ZAPI_CALLBACK_ARGS)
e5c83d9b DS	398	{
	399	struct zapi_route nhr;
	400	char buf[PREFIX2STR_BUFFER];
	401	uint32_t i;
	402
54317f2c A	403	if (!zapi_nexthop_update_decode(zclient->ibuf, &nhr)) {
	404	zlog_warn("Failure to decode Nexthop update message");
	405	return 0;
	406	}
e5c83d9b DS	407
	408	if (DEBUG_MODE_CHECK(&pbr_dbg_zebra, DEBUG_MODE_ALL)) {
	409
	410	DEBUGD(&pbr_dbg_zebra, "%s: Received Nexthop update: %s",
	411	__PRETTY_FUNCTION__,
	412	prefix2str(&nhr.prefix, buf, sizeof(buf)));
	413
	414	DEBUGD(&pbr_dbg_zebra, "%s: (\tNexthops(%u)",
	415	__PRETTY_FUNCTION__, nhr.nexthop_num);
	416
	417	for (i = 0; i < nhr.nexthop_num; i++) {
	418	DEBUGD(&pbr_dbg_zebra,
	419	"%s: \tType: %d: vrf: %d, ifindex: %d gate: %s",
	420	__PRETTY_FUNCTION__, nhr.nexthops[i].type,
	421	nhr.nexthops[i].vrf_id, nhr.nexthops[i].ifindex,
	422	inet_ntoa(nhr.nexthops[i].gate.ipv4));
	423	}
	424	}
	425
	426	pbr_nht_nexthop_update(&nhr);
	427	return 1;
	428	}
	429
	430	extern struct zebra_privs_t pbr_privs;
	431
	432	void pbr_zebra_init(void)
	433	{
	434	struct zclient_options opt = { .receive_notify = true };
	435
26f63a1e	436	zclient = zclient_new(master, &opt);
e5c83d9b DS	437
	438	zclient_init(zclient, ZEBRA_ROUTE_PBR, 0, &pbr_privs);
	439	zclient->zebra_connected = zebra_connected;
	440	zclient->interface_add = interface_add;
	441	zclient->interface_delete = interface_delete;
	442	zclient->interface_up = interface_state_up;
	443	zclient->interface_down = interface_state_down;
	444	zclient->interface_address_add = interface_address_add;
	445	zclient->interface_address_delete = interface_address_delete;
	446	zclient->route_notify_owner = route_notify_owner;
	447	zclient->rule_notify_owner = rule_notify_owner;
	448	zclient->nexthop_update = pbr_zebra_nexthop_update;
	449	}
	450
	451	void pbr_send_rnh(struct nexthop *nhop, bool reg)
	452	{
	453	uint32_t command;
	454	struct prefix p;
	455
	456	command = (reg) ?
	457	ZEBRA_NEXTHOP_REGISTER : ZEBRA_NEXTHOP_UNREGISTER;
	458
	459	memset(&p, 0, sizeof(p));
d3765386	460	switch (nhop->type) {
e5c83d9b DS	461	case NEXTHOP_TYPE_IFINDEX:
	462	case NEXTHOP_TYPE_BLACKHOLE:
	463	return;
	464	case NEXTHOP_TYPE_IPV4:
	465	case NEXTHOP_TYPE_IPV4_IFINDEX:
	466	p.family = AF_INET;
	467	p.u.prefix4.s_addr = nhop->gate.ipv4.s_addr;
	468	p.prefixlen = 32;
	469	break;
	470	case NEXTHOP_TYPE_IPV6:
	471	case NEXTHOP_TYPE_IPV6_IFINDEX:
	472	p.family = AF_INET6;
	473	memcpy(&p.u.prefix6, &nhop->gate.ipv6, 16);
	474	p.prefixlen = 128;
	475	break;
	476	}
	477
	478	if (zclient_send_rnh(zclient, command, &p,
	479	false, nhop->vrf_id) < 0) {
	480	zlog_warn("%s: Failure to send nexthop to zebra",
	481	__PRETTY_FUNCTION__);
	482	}
	483	}
	484
	485	static void pbr_encode_pbr_map_sequence_prefix(struct stream *s,
	486	struct prefix *p,
49027ce8	487	unsigned char family)
e5c83d9b DS	488	{
	489	struct prefix any;
	490
	491	if (!p) {
	492	memset(&any, 0, sizeof(any));
	493	any.family = family;
	494	p = &any;
	495	}
	496
	497	stream_putc(s, p->family);
	498	stream_putc(s, p->prefixlen);
	499	stream_put(s, &p->u.prefix, prefix_blen(p));
	500	}
	501
	502	static void pbr_encode_pbr_map_sequence(struct stream *s,
	503	struct pbr_map_sequence *pbrms,
	504	struct interface *ifp)
	505	{
49027ce8	506	unsigned char family;
e5c83d9b DS	507
e5c83d9b DS	508	family = AF_INET;
49027ce8 DS	509	if (pbrms->family)
49027ce8 DS	510	family = pbrms->family;
e5c83d9b DS	511
	512	stream_putl(s, pbrms->seqno);
	513	stream_putl(s, pbrms->ruleno);
	514	stream_putl(s, pbrms->unique);
	515	pbr_encode_pbr_map_sequence_prefix(s, pbrms->src, family);
	516	stream_putw(s, 0); /* src port */
	517	pbr_encode_pbr_map_sequence_prefix(s, pbrms->dst, family);
	518	stream_putw(s, 0); /* dst port */
614827f8	519	stream_putl(s, 0); /* fwmark */
e5c83d9b DS	520	if (pbrms->nhgrp_name)
	521	stream_putl(s, pbr_nht_get_table(pbrms->nhgrp_name));
	522	else if (pbrms->nhg)
	523	stream_putl(s, pbr_nht_get_table(pbrms->internal_nhg_name));
	524	stream_putl(s, ifp->ifindex);
	525	}
	526
b13e5ad6 DS	527	void pbr_send_pbr_map(struct pbr_map_sequence *pbrms,
b13e5ad6 DS	528	struct pbr_map_interface *pmi, bool install)
e5c83d9b	529	{
b13e5ad6	530	struct pbr_map *pbrm = pbrms->parent;
e5c83d9b	531	struct stream *s;
10a00758	532	uint64_t is_installed = (uint64_t)1 << pmi->install_bit;
37c606ff DS	533
37c606ff DS	534	is_installed &= pbrms->installed;
e5c83d9b	535
37c606ff DS	536	DEBUGD(&pbr_dbg_zebra, "%s: for %s %d(%" PRIu64 ")",
37c606ff DS	537	__PRETTY_FUNCTION__, pbrm->name, install, is_installed);
9b71ea4b DS	538
	539	/*
	540	* If we are installed and asked to do so again
	541	* just return. If we are not installed and asked
	542	* and asked to delete just return;
	543	*/
37c606ff	544	if (install && is_installed)
9b71ea4b DS	545	return;
9b71ea4b DS	546
37c606ff	547	if (!install && !is_installed)
9b71ea4b	548	return;
e5c83d9b DS	549
	550	s = zclient->obuf;
	551	stream_reset(s);
	552
	553	zclient_create_header(s,
	554	install ? ZEBRA_RULE_ADD : ZEBRA_RULE_DELETE,
	555	VRF_DEFAULT);
	556
b13e5ad6 DS	557	/*
	558	* We are sending one item at a time at the moment
	559	*/
	560	stream_putl(s, 1);
e5c83d9b	561
b13e5ad6 DS	562	DEBUGD(&pbr_dbg_zebra, "%s: \t%s %s %d %s %u",
	563	__PRETTY_FUNCTION__, install ? "Installing" : "Deleting",
	564	pbrm->name, install, pmi->ifp->name, pmi->delete);
e5c83d9b	565
b13e5ad6	566	pbr_encode_pbr_map_sequence(s, pbrms, pmi->ifp);
e5c83d9b	567
e5c83d9b DS	568	stream_putw_at(s, 0, stream_get_endp(s));
e5c83d9b DS	569
e5c83d9b DS	570	zclient_send_message(zclient);
e5c83d9b DS	571	}