[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"
#include "pbr_vrf.h"

DEFINE_MTYPE_STATIC(PBRD, PBR_INTERFACE, "PBR Interface")

/* Zebra structure to hold current status. */
struct zclient *zclient;

struct pbr_interface *pbr_if_new(struct interface *ifp)
{
	struct pbr_interface *pbr_ifp;

	zassert(ifp);
	zassert(!ifp->info);

	pbr_ifp = XCALLOC(MTYPE_PBR_INTERFACE, sizeof(*pbr_ifp));

	ifp->info = pbr_ifp;
	return pbr_ifp;
}

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

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

	/* Update nexthops tracked from a `set nexthop` command */
	pbr_nht_nexthop_interface_update(ifp);

	pbr_map_policy_interface_update(ifp, true);

	return 0;
}

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

	pbr_map_policy_interface_update(ifp, false);

	return 0;
}

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

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

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

	return 0;
}

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

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

	if (!c)
		return 0;

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

	connected_free(&c);
	return 0;
}

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

	pbr_nht_nexthop_interface_update(ifp);

	return 0;
}

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

	pbr_nht_nexthop_interface_update(ifp);

	return 0;
}

static int interface_vrf_update(ZAPI_CALLBACK_ARGS)
{
	struct interface *ifp;
	vrf_id_t new_vrf_id;

	ifp = zebra_interface_vrf_update_read(zclient->ibuf, vrf_id,
					      &new_vrf_id);

	if (!ifp) {
		DEBUGD(&pbr_dbg_zebra, "%s: VRF change interface not found",
		       __func__);

		return 0;
	}

	DEBUGD(&pbr_dbg_zebra, "%s: %s VRF change %u -> %u", __func__,
	       ifp->name, vrf_id, new_vrf_id);

	if_update_to_new_vrf(ifp, new_vrf_id);

	return 0;
}

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

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

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

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

	return 0;
}

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

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

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

	installed = 1 << pmi->install_bit;

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

	pbr_map_final_interface_deletion(pbrms->parent, pmi);

	return 0;
}

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

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

	api->prefix.family = install_afi;

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

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

	zclient_route_send(ZEBRA_ROUTE_ADD, zclient, api);
}

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

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

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

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

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

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

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

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

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

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

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

	if (DEBUG_MODE_CHECK(&pbr_dbg_zebra, DEBUG_MODE_ALL)) {

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

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

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

	pbr_nht_nexthop_update(&nhr);
	return 1;
}

extern struct zebra_privs_t pbr_privs;

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

	zclient = zclient_new(master, &opt);

	zclient_init(zclient, ZEBRA_ROUTE_PBR, 0, &pbr_privs);
	zclient->zebra_connected = zebra_connected;
	zclient->interface_address_add = interface_address_add;
	zclient->interface_address_delete = interface_address_delete;
	zclient->interface_vrf_update = interface_vrf_update;
	zclient->route_notify_owner = route_notify_owner;
	zclient->rule_notify_owner = rule_notify_owner;
	zclient->nexthop_update = pbr_zebra_nexthop_update;
}

void pbr_send_rnh(struct nexthop *nhop, bool reg)
{
	uint32_t command;
	struct prefix p;

	command = (reg) ?
		ZEBRA_NEXTHOP_REGISTER : ZEBRA_NEXTHOP_UNREGISTER;

	memset(&p, 0, sizeof(p));
	switch (nhop->type) {
	case NEXTHOP_TYPE_IFINDEX:
	case NEXTHOP_TYPE_BLACKHOLE:
		return;
	case NEXTHOP_TYPE_IPV4:
	case NEXTHOP_TYPE_IPV4_IFINDEX:
		p.family = AF_INET;
		p.u.prefix4.s_addr = nhop->gate.ipv4.s_addr;
		p.prefixlen = 32;
		break;
	case NEXTHOP_TYPE_IPV6:
	case NEXTHOP_TYPE_IPV6_IFINDEX:
		p.family = AF_INET6;
		memcpy(&p.u.prefix6, &nhop->gate.ipv6, 16);
		p.prefixlen = 128;
		if (IN6_IS_ADDR_LINKLOCAL(&nhop->gate.ipv6))
			/*
			 * Don't bother tracking link locals, just track their
			 * interface state.
			 */
			return;
		break;
	}

	if (zclient_send_rnh(zclient, command, &p,
			     false, nhop->vrf_id) < 0) {
		zlog_warn("%s: Failure to send nexthop to zebra",
			  __PRETTY_FUNCTION__);
	}
}

static void pbr_encode_pbr_map_sequence_prefix(struct stream *s,
					       struct prefix *p,
					       unsigned char  family)
{
	struct prefix any;

	if (!p) {
		memset(&any, 0, sizeof(any));
		any.family = family;
		p = &any;
	}

	stream_putc(s, p->family);
	stream_putc(s, p->prefixlen);
	stream_put(s, &p->u.prefix, prefix_blen(p));
}

static void
pbr_encode_pbr_map_sequence_vrf(struct stream *s,
				const struct pbr_map_sequence *pbrms,
				const struct interface *ifp)
{
	struct pbr_vrf *pbr_vrf;

	if (pbrms->vrf_unchanged)
		pbr_vrf = pbr_vrf_lookup_by_id(ifp->vrf_id);
	else
		pbr_vrf = pbr_vrf_lookup_by_name(pbrms->vrf_name);

	if (!pbr_vrf) {
		DEBUGD(&pbr_dbg_zebra, "%s: VRF not found", __func__);
		return;
	}

	stream_putl(s, pbr_vrf->vrf->data.l.table_id);
}

static void pbr_encode_pbr_map_sequence(struct stream *s,
					struct pbr_map_sequence *pbrms,
					struct interface *ifp)
{
	unsigned char family;

	family = AF_INET;
	if (pbrms->family)
		family = pbrms->family;

	stream_putl(s, pbrms->seqno);
	stream_putl(s, pbrms->ruleno);
	stream_putl(s, pbrms->unique);
	pbr_encode_pbr_map_sequence_prefix(s, pbrms->src, family);
	stream_putw(s, 0);  /* src port */
	pbr_encode_pbr_map_sequence_prefix(s, pbrms->dst, family);
	stream_putw(s, 0);  /* dst port */
	stream_putl(s, pbrms->mark);

	if (pbrms->vrf_unchanged || pbrms->vrf_lookup)
		pbr_encode_pbr_map_sequence_vrf(s, pbrms, ifp);
	else 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"
be3b67b5	42	#include "pbr_vrf.h"
e5c83d9b DS	43
	44	DEFINE_MTYPE_STATIC(PBRD, PBR_INTERFACE, "PBR Interface")
	45
	46	/* Zebra structure to hold current status. */
d3765386	47	struct zclient *zclient;
e5c83d9b	48
b13e5ad6	49	struct pbr_interface pbr_if_new(struct interface ifp)
e5c83d9b DS	50	{
	51	struct pbr_interface *pbr_ifp;
	52
	53	zassert(ifp);
	54	zassert(!ifp->info);
	55
	56	pbr_ifp = XCALLOC(MTYPE_PBR_INTERFACE, sizeof(*pbr_ifp));
	57
10a00758 DS	58	ifp->info = pbr_ifp;
10a00758 DS	59	return pbr_ifp;
e5c83d9b DS	60	}
	61
	62	/* Inteface addition message from zebra. */
ef7bd2a3	63	int pbr_ifp_create(struct interface *ifp)
e5c83d9b	64	{
2f61710b DS	65	DEBUGD(&pbr_dbg_zebra,
	66	"%s: %s", __PRETTY_FUNCTION__, ifp->name);
	67
10a00758 DS	68	if (!ifp->info)
10a00758 DS	69	pbr_if_new(ifp);
e5c83d9b	70
be3b67b5	71	/* Update nexthops tracked from a `set nexthop` command */
a106a408 RW	72	pbr_nht_nexthop_interface_update(ifp);
a106a408 RW	73
be3b67b5 SW	74	pbr_map_policy_interface_update(ifp, true);
be3b67b5 SW	75
e5c83d9b DS	76	return 0;
	77	}
	78
3c3c3252	79	int pbr_ifp_destroy(struct interface *ifp)
e5c83d9b	80	{
2f61710b DS	81	DEBUGD(&pbr_dbg_zebra,
	82	"%s: %s", __PRETTY_FUNCTION__, ifp->name);
	83
be3b67b5 SW	84	pbr_map_policy_interface_update(ifp, false);
be3b67b5 SW	85
e5c83d9b DS	86	return 0;
	87	}
	88
121f9dee	89	static int interface_address_add(ZAPI_CALLBACK_ARGS)
e5c83d9b	90	{
2f61710b DS	91	struct connected *c;
	92	char buf[PREFIX_STRLEN];
	93
121f9dee	94	c = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
2f61710b DS	95
2f61710b DS	96	DEBUGD(&pbr_dbg_zebra,
964c3dba DS	97	"%s: %s added %s", __PRETTY_FUNCTION__,
	98	c ? c->ifp->name : "Unknown",
	99	c ? prefix2str(c->address, buf, sizeof(buf)) : "Unknown");
e5c83d9b DS	100
	101	return 0;
	102	}
	103
121f9dee	104	static int interface_address_delete(ZAPI_CALLBACK_ARGS)
e5c83d9b DS	105	{
e5c83d9b DS	106	struct connected *c;
2f61710b	107	char buf[PREFIX_STRLEN];
e5c83d9b	108
121f9dee	109	c = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
e5c83d9b DS	110
	111	if (!c)
	112	return 0;
	113
2f61710b DS	114	DEBUGD(&pbr_dbg_zebra,
	115	"%s: %s deleted %s", __PRETTY_FUNCTION__, c->ifp->name,
	116	prefix2str(c->address, buf, sizeof(buf)));
	117
721c0857	118	connected_free(&c);
e5c83d9b DS	119	return 0;
	120	}
	121
ddbf3e60	122	int pbr_ifp_up(struct interface *ifp)
e5c83d9b	123	{
2f61710b DS	124	DEBUGD(&pbr_dbg_zebra,
2f61710b DS	125	"%s: %s is up", __PRETTY_FUNCTION__, ifp->name);
e5c83d9b	126
a106a408 RW	127	pbr_nht_nexthop_interface_update(ifp);
a106a408 RW	128
e5c83d9b DS	129	return 0;
	130	}
	131
b0b69e59	132	int pbr_ifp_down(struct interface *ifp)
e5c83d9b	133	{
2f61710b DS	134	DEBUGD(&pbr_dbg_zebra,
2f61710b DS	135	"%s: %s is down", __PRETTY_FUNCTION__, ifp->name);
e5c83d9b	136
a106a408 RW	137	pbr_nht_nexthop_interface_update(ifp);
a106a408 RW	138
e5c83d9b DS	139	return 0;
	140	}
	141
be3b67b5 SW	142	static int interface_vrf_update(ZAPI_CALLBACK_ARGS)
	143	{
	144	struct interface *ifp;
	145	vrf_id_t new_vrf_id;
	146
	147	ifp = zebra_interface_vrf_update_read(zclient->ibuf, vrf_id,
	148	&new_vrf_id);
	149
	150	if (!ifp) {
	151	DEBUGD(&pbr_dbg_zebra, "%s: VRF change interface not found",
	152	__func__);
	153
	154	return 0;
	155	}
	156
	157	DEBUGD(&pbr_dbg_zebra, "%s: %s VRF change %u -> %u", __func__,
	158	ifp->name, vrf_id, new_vrf_id);
	159
	160	if_update_to_new_vrf(ifp, new_vrf_id);
	161
	162	return 0;
	163	}
	164
121f9dee	165	static int route_notify_owner(ZAPI_CALLBACK_ARGS)
e5c83d9b DS	166	{
	167	struct prefix p;
	168	enum zapi_route_notify_owner note;
	169	uint32_t table_id;
	170	char buf[PREFIX_STRLEN];
	171
e5c83d9b DS	172	if (!zapi_route_notify_decode(zclient->ibuf, &p, &table_id, &note))
	173	return -1;
	174
2f61710b DS	175	prefix2str(&p, buf, sizeof(buf));
2f61710b DS	176
e5c83d9b DS	177	switch (note) {
	178	case ZAPI_ROUTE_FAIL_INSTALL:
	179	DEBUGD(&pbr_dbg_zebra,
	180	"%s: [%s] Route install failure for table: %u",
	181	__PRETTY_FUNCTION__, buf, table_id);
	182	break;
	183	case ZAPI_ROUTE_BETTER_ADMIN_WON:
	184	DEBUGD(&pbr_dbg_zebra,
	185	"%s: [%s] Route better admin distance won for table: %u",
	186	__PRETTY_FUNCTION__, buf, table_id);
	187	break;
	188	case ZAPI_ROUTE_INSTALLED:
	189	DEBUGD(&pbr_dbg_zebra,
	190	"%s: [%s] Route installed succeeded for table: %u",
	191	__PRETTY_FUNCTION__, buf, table_id);
	192	pbr_nht_route_installed_for_table(table_id);
	193	break;
	194	case ZAPI_ROUTE_REMOVED:
	195	DEBUGD(&pbr_dbg_zebra,
	196	"%s: [%s] Route Removed succeeded for table: %u",
	197	__PRETTY_FUNCTION__, buf, table_id);
	198	pbr_nht_route_removed_for_table(table_id);
	199	break;
	200	case ZAPI_ROUTE_REMOVE_FAIL:
	201	DEBUGD(&pbr_dbg_zebra,
	202	"%s: [%s] Route remove fail for table: %u",
	203	__PRETTY_FUNCTION__, buf, table_id);
	204	break;
	205	}
	206
	207	return 0;
	208	}
	209
121f9dee	210	static int rule_notify_owner(ZAPI_CALLBACK_ARGS)
e5c83d9b DS	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;
fa0069c6 DS	237	DEBUGD(&pbr_dbg_zebra,
fa0069c6 DS	238	"%s: Received RULE_FAIL_INSTALL: %" PRIu64,
2f61710b	239	__PRETTY_FUNCTION__, pbrms->installed);
e5c83d9b DS	240	break;
e5c83d9b DS	241	case ZAPI_RULE_INSTALLED:
37c606ff	242	pbrms->installed \|= installed;
fa0069c6	243	DEBUGD(&pbr_dbg_zebra, "%s: Received RULE_INSTALLED: %" PRIu64,
2f61710b	244	__PRETTY_FUNCTION__, pbrms->installed);
e5c83d9b	245	break;
373dd3b5	246	case ZAPI_RULE_FAIL_REMOVE:
e5c83d9b	247	case ZAPI_RULE_REMOVED:
0f03639d	248	pbrms->installed &= ~installed;
fa0069c6	249	DEBUGD(&pbr_dbg_zebra, "%s: Received RULE REMOVED: %" PRIu64,
2f61710b	250	__PRETTY_FUNCTION__, pbrms->installed);
e5c83d9b DS	251	break;
	252	}
	253
38e9ccde DS	254	pbr_map_final_interface_deletion(pbrms->parent, pmi);
38e9ccde DS	255
e5c83d9b DS	256	return 0;
	257	}
	258
	259	static void zebra_connected(struct zclient *zclient)
	260	{
2f61710b DS	261	DEBUGD(&pbr_dbg_zebra, "%s: Registering for fun and profit",
2f61710b DS	262	__PRETTY_FUNCTION__);
e5c83d9b DS	263	zclient_send_reg_requests(zclient, VRF_DEFAULT);
	264	}
	265
	266	static void route_add_helper(struct zapi_route *api, struct nexthop_group nhg,
	267	uint8_t install_afi)
	268	{
	269	struct zapi_nexthop *api_nh;
2f61710b	270	char buf[PREFIX_STRLEN];
e5c83d9b DS	271	struct nexthop *nhop;
	272	int i;
	273
	274	api->prefix.family = install_afi;
	275
2f61710b DS	276	DEBUGD(&pbr_dbg_zebra, "\tEncoding %s",
	277	prefix2str(&api->prefix, buf, sizeof(buf)));
	278
e5c83d9b DS	279	i = 0;
	280	for (ALL_NEXTHOPS(nhg, nhop)) {
	281	api_nh = &api->nexthops[i];
	282	api_nh->vrf_id = nhop->vrf_id;
	283	api_nh->type = nhop->type;
	284	switch (nhop->type) {
	285	case NEXTHOP_TYPE_IPV4:
	286	api_nh->gate.ipv4 = nhop->gate.ipv4;
	287	break;
	288	case NEXTHOP_TYPE_IPV4_IFINDEX:
	289	api_nh->gate.ipv4 = nhop->gate.ipv4;
	290	api_nh->ifindex = nhop->ifindex;
	291	break;
	292	case NEXTHOP_TYPE_IFINDEX:
	293	api_nh->ifindex = nhop->ifindex;
	294	break;
	295	case NEXTHOP_TYPE_IPV6:
	296	memcpy(&api_nh->gate.ipv6, &nhop->gate.ipv6, 16);
	297	break;
	298	case NEXTHOP_TYPE_IPV6_IFINDEX:
	299	api_nh->ifindex = nhop->ifindex;
	300	memcpy(&api_nh->gate.ipv6, &nhop->gate.ipv6, 16);
	301	break;
	302	case NEXTHOP_TYPE_BLACKHOLE:
	303	api_nh->bh_type = nhop->bh_type;
	304	break;
	305	}
	306	i++;
	307	}
	308	api->nexthop_num = i;
	309
	310	zclient_route_send(ZEBRA_ROUTE_ADD, zclient, api);
	311	}
	312
	313	/*
	314	* This function assumes a default route is being
	315	* installed into the appropriate tableid
	316	*/
	317	void route_add(struct pbr_nexthop_group_cache *pnhgc, struct nexthop_group nhg,
	318	afi_t install_afi)
	319	{
	320	struct zapi_route api;
	321
2f61710b DS	322	DEBUGD(&pbr_dbg_zebra, "%s for Table: %d", __PRETTY_FUNCTION__,
	323	pnhgc->table_id);
	324
e5c83d9b DS	325	memset(&api, 0, sizeof(api));
	326
	327	api.vrf_id = VRF_DEFAULT;
	328	api.type = ZEBRA_ROUTE_PBR;
	329	api.safi = SAFI_UNICAST;
	330	/*
	331	* Sending a default route
	332	*/
	333	api.tableid = pnhgc->table_id;
	334	SET_FLAG(api.flags, ZEBRA_FLAG_ALLOW_RECURSION);
	335	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
	336	SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
	337	switch (install_afi) {
	338	case AFI_MAX:
	339	route_add_helper(&api, nhg, AF_INET);
	340	route_add_helper(&api, nhg, AF_INET6);
	341	break;
	342	case AFI_IP:
	343	route_add_helper(&api, nhg, AF_INET);
	344	break;
	345	case AFI_IP6:
	346	route_add_helper(&api, nhg, AF_INET6);
	347	break;
	348	case AFI_L2VPN:
	349	DEBUGD(&pbr_dbg_zebra,
	350	"%s: Asked to install unsupported route type: L2VPN",
	351	__PRETTY_FUNCTION__);
	352	break;
b26f891d SW	353	case AFI_UNSPEC:
	354	DEBUGD(&pbr_dbg_zebra,
	355	"%s: Asked to install unspecified route type",
	356	__PRETTY_FUNCTION__);
	357	break;
e5c83d9b DS	358	}
	359	}
	360
	361	/*
	362	* This function assumes a default route is being
	363	* removed from the appropriate tableid
	364	*/
	365	void route_delete(struct pbr_nexthop_group_cache *pnhgc, afi_t afi)
	366	{
	367	struct zapi_route api;
	368
2f61710b DS	369	DEBUGD(&pbr_dbg_zebra, "%s for Table: %d", __PRETTY_FUNCTION__,
	370	pnhgc->table_id);
	371
e5c83d9b DS	372	memset(&api, 0, sizeof(api));
	373	api.vrf_id = VRF_DEFAULT;
	374	api.type = ZEBRA_ROUTE_PBR;
	375	api.safi = SAFI_UNICAST;
	376
	377	api.tableid = pnhgc->table_id;
	378	SET_FLAG(api.message, ZAPI_MESSAGE_TABLEID);
	379
	380	switch (afi) {
	381	case AFI_IP:
	382	api.prefix.family = AF_INET;
	383	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	384	break;
	385	case AFI_IP6:
	386	api.prefix.family = AF_INET6;
	387	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	388	break;
	389	case AFI_MAX:
	390	api.prefix.family = AF_INET;
	391	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	392	api.prefix.family = AF_INET6;
	393	zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
	394	break;
	395	case AFI_L2VPN:
	396	DEBUGD(&pbr_dbg_zebra,
	397	"%s: Asked to delete unsupported route type: L2VPN",
	398	__PRETTY_FUNCTION__);
	399	break;
b26f891d SW	400	case AFI_UNSPEC:
	401	DEBUGD(&pbr_dbg_zebra,
	402	"%s: Asked to delete unspecified route type",
	403	__PRETTY_FUNCTION__);
	404	break;
e5c83d9b	405	}
e5c83d9b DS	406	}
e5c83d9b DS	407
121f9dee	408	static int pbr_zebra_nexthop_update(ZAPI_CALLBACK_ARGS)
e5c83d9b DS	409	{
	410	struct zapi_route nhr;
	411	char buf[PREFIX2STR_BUFFER];
	412	uint32_t i;
	413
54317f2c A	414	if (!zapi_nexthop_update_decode(zclient->ibuf, &nhr)) {
	415	zlog_warn("Failure to decode Nexthop update message");
	416	return 0;
	417	}
e5c83d9b DS	418
	419	if (DEBUG_MODE_CHECK(&pbr_dbg_zebra, DEBUG_MODE_ALL)) {
	420
	421	DEBUGD(&pbr_dbg_zebra, "%s: Received Nexthop update: %s",
	422	__PRETTY_FUNCTION__,
	423	prefix2str(&nhr.prefix, buf, sizeof(buf)));
	424
	425	DEBUGD(&pbr_dbg_zebra, "%s: (\tNexthops(%u)",
	426	__PRETTY_FUNCTION__, nhr.nexthop_num);
	427
	428	for (i = 0; i < nhr.nexthop_num; i++) {
	429	DEBUGD(&pbr_dbg_zebra,
	430	"%s: \tType: %d: vrf: %d, ifindex: %d gate: %s",
	431	__PRETTY_FUNCTION__, nhr.nexthops[i].type,
	432	nhr.nexthops[i].vrf_id, nhr.nexthops[i].ifindex,
	433	inet_ntoa(nhr.nexthops[i].gate.ipv4));
	434	}
	435	}
	436
	437	pbr_nht_nexthop_update(&nhr);
	438	return 1;
	439	}
	440
	441	extern struct zebra_privs_t pbr_privs;
	442
	443	void pbr_zebra_init(void)
	444	{
	445	struct zclient_options opt = { .receive_notify = true };
	446
26f63a1e	447	zclient = zclient_new(master, &opt);
e5c83d9b DS	448
	449	zclient_init(zclient, ZEBRA_ROUTE_PBR, 0, &pbr_privs);
	450	zclient->zebra_connected = zebra_connected;
e5c83d9b DS	451	zclient->interface_address_add = interface_address_add;
e5c83d9b DS	452	zclient->interface_address_delete = interface_address_delete;
be3b67b5	453	zclient->interface_vrf_update = interface_vrf_update;
e5c83d9b DS	454	zclient->route_notify_owner = route_notify_owner;
	455	zclient->rule_notify_owner = rule_notify_owner;
	456	zclient->nexthop_update = pbr_zebra_nexthop_update;
	457	}
	458
	459	void pbr_send_rnh(struct nexthop *nhop, bool reg)
	460	{
	461	uint32_t command;
	462	struct prefix p;
	463
	464	command = (reg) ?
	465	ZEBRA_NEXTHOP_REGISTER : ZEBRA_NEXTHOP_UNREGISTER;
	466
	467	memset(&p, 0, sizeof(p));
d3765386	468	switch (nhop->type) {
e5c83d9b DS	469	case NEXTHOP_TYPE_IFINDEX:
	470	case NEXTHOP_TYPE_BLACKHOLE:
	471	return;
	472	case NEXTHOP_TYPE_IPV4:
	473	case NEXTHOP_TYPE_IPV4_IFINDEX:
	474	p.family = AF_INET;
	475	p.u.prefix4.s_addr = nhop->gate.ipv4.s_addr;
	476	p.prefixlen = 32;
	477	break;
	478	case NEXTHOP_TYPE_IPV6:
	479	case NEXTHOP_TYPE_IPV6_IFINDEX:
	480	p.family = AF_INET6;
	481	memcpy(&p.u.prefix6, &nhop->gate.ipv6, 16);
	482	p.prefixlen = 128;
cb254f41 SW	483	if (IN6_IS_ADDR_LINKLOCAL(&nhop->gate.ipv6))
	484	/*
	485	* Don't bother tracking link locals, just track their
	486	* interface state.
	487	*/
	488	return;
e5c83d9b DS	489	break;
	490	}
	491
	492	if (zclient_send_rnh(zclient, command, &p,
	493	false, nhop->vrf_id) < 0) {
	494	zlog_warn("%s: Failure to send nexthop to zebra",
	495	__PRETTY_FUNCTION__);
	496	}
	497	}
	498
	499	static void pbr_encode_pbr_map_sequence_prefix(struct stream *s,
	500	struct prefix *p,
49027ce8	501	unsigned char family)
e5c83d9b DS	502	{
	503	struct prefix any;
	504
	505	if (!p) {
	506	memset(&any, 0, sizeof(any));
	507	any.family = family;
	508	p = &any;
	509	}
	510
	511	stream_putc(s, p->family);
	512	stream_putc(s, p->prefixlen);
	513	stream_put(s, &p->u.prefix, prefix_blen(p));
	514	}
	515
be3b67b5 SW	516	static void
	517	pbr_encode_pbr_map_sequence_vrf(struct stream *s,
	518	const struct pbr_map_sequence *pbrms,
	519	const struct interface *ifp)
	520	{
	521	struct pbr_vrf *pbr_vrf;
	522
	523	if (pbrms->vrf_unchanged)
	524	pbr_vrf = pbr_vrf_lookup_by_id(ifp->vrf_id);
	525	else
	526	pbr_vrf = pbr_vrf_lookup_by_name(pbrms->vrf_name);
	527
	528	if (!pbr_vrf) {
	529	DEBUGD(&pbr_dbg_zebra, "%s: VRF not found", __func__);
	530	return;
	531	}
	532
	533	stream_putl(s, pbr_vrf->vrf->data.l.table_id);
	534	}
	535
e5c83d9b DS	536	static void pbr_encode_pbr_map_sequence(struct stream *s,
	537	struct pbr_map_sequence *pbrms,
	538	struct interface *ifp)
	539	{
49027ce8	540	unsigned char family;
e5c83d9b DS	541
e5c83d9b DS	542	family = AF_INET;
49027ce8 DS	543	if (pbrms->family)
49027ce8 DS	544	family = pbrms->family;
e5c83d9b DS	545
	546	stream_putl(s, pbrms->seqno);
	547	stream_putl(s, pbrms->ruleno);
	548	stream_putl(s, pbrms->unique);
	549	pbr_encode_pbr_map_sequence_prefix(s, pbrms->src, family);
	550	stream_putw(s, 0); /* src port */
	551	pbr_encode_pbr_map_sequence_prefix(s, pbrms->dst, family);
	552	stream_putw(s, 0); /* dst port */
95a9fe02	553	stream_putl(s, pbrms->mark);
be3b67b5 SW	554
	555	if (pbrms->vrf_unchanged \|\| pbrms->vrf_lookup)
	556	pbr_encode_pbr_map_sequence_vrf(s, pbrms, ifp);
	557	else if (pbrms->nhgrp_name)
e5c83d9b DS	558	stream_putl(s, pbr_nht_get_table(pbrms->nhgrp_name));
	559	else if (pbrms->nhg)
	560	stream_putl(s, pbr_nht_get_table(pbrms->internal_nhg_name));
	561	stream_putl(s, ifp->ifindex);
	562	}
	563
b13e5ad6 DS	564	void pbr_send_pbr_map(struct pbr_map_sequence *pbrms,
b13e5ad6 DS	565	struct pbr_map_interface *pmi, bool install)
e5c83d9b	566	{
b13e5ad6	567	struct pbr_map *pbrm = pbrms->parent;
e5c83d9b	568	struct stream *s;
10a00758	569	uint64_t is_installed = (uint64_t)1 << pmi->install_bit;
37c606ff DS	570
37c606ff DS	571	is_installed &= pbrms->installed;
e5c83d9b	572
37c606ff DS	573	DEBUGD(&pbr_dbg_zebra, "%s: for %s %d(%" PRIu64 ")",
37c606ff DS	574	__PRETTY_FUNCTION__, pbrm->name, install, is_installed);
9b71ea4b DS	575
	576	/*
	577	* If we are installed and asked to do so again
	578	* just return. If we are not installed and asked
	579	* and asked to delete just return;
	580	*/
37c606ff	581	if (install && is_installed)
9b71ea4b DS	582	return;
9b71ea4b DS	583
37c606ff	584	if (!install && !is_installed)
9b71ea4b	585	return;
e5c83d9b DS	586
	587	s = zclient->obuf;
	588	stream_reset(s);
	589
	590	zclient_create_header(s,
	591	install ? ZEBRA_RULE_ADD : ZEBRA_RULE_DELETE,
	592	VRF_DEFAULT);
	593
b13e5ad6 DS	594	/*
	595	* We are sending one item at a time at the moment
	596	*/
	597	stream_putl(s, 1);
e5c83d9b	598
b13e5ad6 DS	599	DEBUGD(&pbr_dbg_zebra, "%s: \t%s %s %d %s %u",
	600	__PRETTY_FUNCTION__, install ? "Installing" : "Deleting",
	601	pbrm->name, install, pmi->ifp->name, pmi->delete);
e5c83d9b	602
b13e5ad6	603	pbr_encode_pbr_map_sequence(s, pbrms, pmi->ifp);
e5c83d9b	604
e5c83d9b DS	605	stream_putw_at(s, 0, stream_get_endp(s));
e5c83d9b DS	606
e5c83d9b DS	607	zclient_send_message(zclient);
e5c83d9b DS	608	}