[mirror_frr.git] / zebra / connected.c

/*
 * Address linked list routine.
 * Copyright (C) 1997, 98 Kunihiro Ishiguro
 *
 * This file is part of GNU Zebra.
 *
 * GNU Zebra 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.
 *
 * GNU Zebra 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 "prefix.h"
#include "linklist.h"
#include "if.h"
#include "table.h"
#include "rib.h"
#include "table.h"
#include "log.h"
#include "memory.h"
#include "zebra_memory.h"

#include "vty.h"
#include "zebra/debug.h"
#include "zebra/zserv.h"
#include "zebra/redistribute.h"
#include "zebra/interface.h"
#include "zebra/connected.h"
#include "zebra/rtadv.h"
#include "zebra/zebra_mpls.h"
#include "zebra/debug.h"

/* communicate the withdrawal of a connected address */
static void connected_withdraw(struct connected *ifc)
{
	if (!ifc)
		return;

	/* Update interface address information to protocol daemon. */
	if (CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL)) {
		zebra_interface_address_delete_update(ifc->ifp, ifc);

		if (ifc->address->family == AF_INET)
			if_subnet_delete(ifc->ifp, ifc);

		connected_down(ifc->ifp, ifc);

		UNSET_FLAG(ifc->conf, ZEBRA_IFC_REAL);
	}

	/* The address is not in the kernel anymore, so clear the flag */
	UNSET_FLAG(ifc->conf, ZEBRA_IFC_QUEUED);

	if (!CHECK_FLAG(ifc->conf, ZEBRA_IFC_CONFIGURED)) {
		listnode_delete(ifc->ifp->connected, ifc);
		connected_free(ifc);
	}
}

static void connected_announce(struct interface *ifp, struct connected *ifc)
{
	if (!ifc)
		return;

	if (!if_is_loopback(ifp) && ifc->address->family == AF_INET) {
		if (ifc->address->prefixlen == 32)
			SET_FLAG(ifc->flags, ZEBRA_IFA_UNNUMBERED);
		else
			UNSET_FLAG(ifc->flags, ZEBRA_IFA_UNNUMBERED);
	}

	listnode_add(ifp->connected, ifc);

	/* Update interface address information to protocol daemon. */
	if (ifc->address->family == AF_INET)
		if_subnet_add(ifp, ifc);

	zebra_interface_address_add_update(ifp, ifc);

	if (if_is_operative(ifp)) {
		connected_up(ifp, ifc);
	}
}

/* If same interface address is already exist... */
struct connected *connected_check(struct interface *ifp,
				  union prefixconstptr pu)
{
	const struct prefix *p = pu.p;
	struct connected *ifc;
	struct listnode *node;

	for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc))
		if (prefix_same(ifc->address, p))
			return ifc;

	return NULL;
}

/* same, but with peer address */
struct connected *connected_check_ptp(struct interface *ifp,
				      union prefixconstptr pu,
				      union prefixconstptr du)
{
	const struct prefix *p = pu.p;
	const struct prefix *d = du.p;
	struct connected *ifc;
	struct listnode *node;

	/* ignore broadcast addresses */
	if (p->prefixlen != IPV4_MAX_PREFIXLEN)
		d = NULL;

	for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) {
		if (!prefix_same(ifc->address, p))
			continue;
		if (!CONNECTED_PEER(ifc) && !d)
			return ifc;
		if (CONNECTED_PEER(ifc) && d
		    && prefix_same(ifc->destination, d))
			return ifc;
	}

	return NULL;
}

/* Check if two ifc's describe the same address in the same state */
static int connected_same(struct connected *ifc1, struct connected *ifc2)
{
	if (ifc1->ifp != ifc2->ifp)
		return 0;

	if (ifc1->destination)
		if (!ifc2->destination)
			return 0;
	if (ifc2->destination)
		if (!ifc1->destination)
			return 0;

	if (ifc1->destination && ifc2->destination)
		if (!prefix_same(ifc1->destination, ifc2->destination))
			return 0;

	if (ifc1->flags != ifc2->flags)
		return 0;

	if (ifc1->conf != ifc2->conf)
		return 0;

	return 1;
}

/* Handle changes to addresses and send the neccesary announcements
 * to clients. */
static void connected_update(struct interface *ifp, struct connected *ifc)
{
	struct connected *current;

	/* Check same connected route. */
	current = connected_check_ptp(ifp, ifc->address, ifc->destination);
	if (current) {
		if (CHECK_FLAG(current->conf, ZEBRA_IFC_CONFIGURED))
			SET_FLAG(ifc->conf, ZEBRA_IFC_CONFIGURED);

		/* Avoid spurious withdraws, this might be just the kernel
		 * 'reflecting'
		 * back an address we have already added.
		 */
		if (connected_same(current, ifc)) {
			/* nothing to do */
			connected_free(ifc);
			return;
		}

		/* Clear the configured flag on the old ifc, so it will be freed
		 * by
		 * connected withdraw. */
		UNSET_FLAG(current->conf, ZEBRA_IFC_CONFIGURED);
		connected_withdraw(
			current); /* implicit withdraw - freebsd does this */
	}

	/* If the connected is new or has changed, announce it, if it is usable
	 */
	if (CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL))
		connected_announce(ifp, ifc);
}

/* Called from if_up(). */
void connected_up(struct interface *ifp, struct connected *ifc)
{
	afi_t afi;
	struct prefix p;
	struct nexthop nh = {
		.type = NEXTHOP_TYPE_IFINDEX, .ifindex = ifp->ifindex,
	};

	if (!CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL))
		return;

	PREFIX_COPY(&p, CONNECTED_PREFIX(ifc));

	/* Apply mask to the network. */
	apply_mask(&p);

	afi = family2afi(p.family);

	switch (afi) {
	case AFI_IP:
		/*
		 * In case of connected address is 0.0.0.0/0 we treat it tunnel
		 * address.
		 */
		if (prefix_ipv4_any((struct prefix_ipv4 *)&p))
			return;
		break;
	case AFI_IP6:
#ifndef LINUX
		/* XXX: It is already done by rib_bogus_ipv6 within rib_add */
		if (IN6_IS_ADDR_UNSPECIFIED(&p.u.prefix6))
			return;
#endif
		break;
	default:
		zlog_warn("Received unknown AFI: %s", afi2str(afi));
		return;
		break;
	}

	rib_add(afi, SAFI_UNICAST, ifp->vrf_id, ifp->vrf_id,
		ZEBRA_ROUTE_CONNECT, 0, 0,
		&p, NULL, &nh, RT_TABLE_MAIN, ifp->metric, 0, 0, 0);

	rib_add(afi, SAFI_MULTICAST, ifp->vrf_id, ifp->vrf_id,
		ZEBRA_ROUTE_CONNECT, 0, 0,
		&p, NULL, &nh, RT_TABLE_MAIN, ifp->metric, 0, 0, 0);

	if (IS_ZEBRA_DEBUG_RIB_DETAILED) {
		char buf[PREFIX_STRLEN];

		zlog_debug("%u: IF %s address %s add/up, scheduling RIB processing",
			   ifp->vrf_id, ifp->name,
			   prefix2str(&p, buf, sizeof(buf)));
	}
	rib_update(ifp->vrf_id, RIB_UPDATE_IF_CHANGE);

	/* Schedule LSP forwarding entries for processing, if appropriate. */
	if (ifp->vrf_id == VRF_DEFAULT) {
		if (IS_ZEBRA_DEBUG_MPLS) {
			char buf[PREFIX_STRLEN];

			zlog_debug("%u: IF %s IP %s address add/up, scheduling MPLS processing",
				   ifp->vrf_id, ifp->name,
				   prefix2str(&p, buf, sizeof(buf)));
		}
		mpls_mark_lsps_for_processing(vrf_info_lookup(ifp->vrf_id));
	}
}

/* Add connected IPv4 route to the interface. */
void connected_add_ipv4(struct interface *ifp, int flags, struct in_addr *addr,
			u_char prefixlen, struct in_addr *broad,
			const char *label)
{
	struct prefix_ipv4 *p;
	struct connected *ifc;

	if (ipv4_martian(addr))
		return;

	/* Make connected structure. */
	ifc = connected_new();
	ifc->ifp = ifp;
	ifc->flags = flags;
	/* If we get a notification from the kernel,
	 * we can safely assume the address is known to the kernel */
	SET_FLAG(ifc->conf, ZEBRA_IFC_QUEUED);

	/* Allocate new connected address. */
	p = prefix_ipv4_new();
	p->family = AF_INET;
	p->prefix = *addr;
	p->prefixlen = CHECK_FLAG(flags, ZEBRA_IFA_PEER) ? IPV4_MAX_PREFIXLEN
							 : prefixlen;
	ifc->address = (struct prefix *)p;

	/* If there is broadcast or peer address. */
	if (broad) {
		p = prefix_ipv4_new();
		p->family = AF_INET;
		p->prefix = *broad;
		p->prefixlen = prefixlen;
		ifc->destination = (struct prefix *)p;

		/* validate the destination address */
		if (CONNECTED_PEER(ifc)) {
			if (IPV4_ADDR_SAME(addr, broad))
				zlog_warn(
					"warning: interface %s has same local and peer "
					"address %s, routing protocols may malfunction",
					ifp->name, inet_ntoa(*addr));
		} else {
			if (broad->s_addr
			    != ipv4_broadcast_addr(addr->s_addr, prefixlen)) {
				char buf[2][INET_ADDRSTRLEN];
				struct in_addr bcalc;
				bcalc.s_addr = ipv4_broadcast_addr(addr->s_addr,
								   prefixlen);
				zlog_warn(
					"warning: interface %s broadcast addr %s/%d != "
					"calculated %s, routing protocols may malfunction",
					ifp->name,
					inet_ntop(AF_INET, broad, buf[0],
						  sizeof(buf[0])),
					prefixlen,
					inet_ntop(AF_INET, &bcalc, buf[1],
						  sizeof(buf[1])));
			}
		}

	} else {
		if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_PEER)) {
			zlog_warn(
				"warning: %s called for interface %s "
				"with peer flag set, but no peer address supplied",
				__func__, ifp->name);
			UNSET_FLAG(ifc->flags, ZEBRA_IFA_PEER);
		}

		/* no broadcast or destination address was supplied */
		if ((prefixlen == IPV4_MAX_PREFIXLEN) && if_is_pointopoint(ifp))
			zlog_warn(
				"warning: PtP interface %s with addr %s/%d needs a "
				"peer address",
				ifp->name, inet_ntoa(*addr), prefixlen);
	}

	/* Label of this address. */
	if (label)
		ifc->label = XSTRDUP(MTYPE_CONNECTED_LABEL, label);

	/* For all that I know an IPv4 address is always ready when we receive
	 * the notification. So it should be safe to set the REAL flag here. */
	SET_FLAG(ifc->conf, ZEBRA_IFC_REAL);

	connected_update(ifp, ifc);
}

void connected_down(struct interface *ifp, struct connected *ifc)
{
	afi_t afi;
	struct prefix p;
	struct nexthop nh = {
		.type = NEXTHOP_TYPE_IFINDEX, .ifindex = ifp->ifindex,
	};

	if (!CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL))
		return;

	PREFIX_COPY(&p, CONNECTED_PREFIX(ifc));

	/* Apply mask to the network. */
	apply_mask(&p);

	afi = family2afi(p.family);

	switch (afi) {
	case AFI_IP:
		/*
		 * In case of connected address is 0.0.0.0/0 we treat it tunnel
		 *  address.
		 */
		if (prefix_ipv4_any((struct prefix_ipv4 *)&p))
			return;
		break;
	case AFI_IP6:
		if (IN6_IS_ADDR_UNSPECIFIED(&p.u.prefix6))
			return;
		break;
	default:
		zlog_info("Unknown AFI: %s", afi2str(afi));
		break;
	}

	/*
	 * Same logic as for connected_up(): push the changes into the
	 * head.
	 */
	rib_delete(afi, SAFI_UNICAST, ifp->vrf_id, ZEBRA_ROUTE_CONNECT, 0, 0,
		   &p, NULL, &nh, 0, 0, false, NULL);

	rib_delete(afi, SAFI_MULTICAST, ifp->vrf_id, ZEBRA_ROUTE_CONNECT, 0,
		   0, &p, NULL, &nh, 0, 0, false, NULL);

	if (IS_ZEBRA_DEBUG_RIB_DETAILED) {
		char buf[PREFIX_STRLEN];

		zlog_debug("%u: IF %s IP %s address down, scheduling RIB processing",
			   ifp->vrf_id, ifp->name,
			   prefix2str(&p, buf, sizeof(buf)));
	}

	rib_update(ifp->vrf_id, RIB_UPDATE_IF_CHANGE);

	/* Schedule LSP forwarding entries for processing, if appropriate. */
	if (ifp->vrf_id == VRF_DEFAULT) {
		if (IS_ZEBRA_DEBUG_MPLS) {
			char buf[PREFIX_STRLEN];

			zlog_debug("%u: IF %s IP %s address down, scheduling MPLS processing",
				   ifp->vrf_id, ifp->name,
				   prefix2str(&p, buf, sizeof(buf)));
		}
		mpls_mark_lsps_for_processing(vrf_info_lookup(ifp->vrf_id));
	}
}

static void connected_delete_helper(struct connected *ifc, struct prefix *p)
{
	struct interface *ifp;

	if (!ifc)
		return;
	ifp = ifc->ifp;

	connected_withdraw(ifc);

	if (IS_ZEBRA_DEBUG_RIB_DETAILED) {
		char buf[PREFIX_STRLEN];

		zlog_debug("%u: IF %s IP %s address del, scheduling RIB processing",
			   ifp->vrf_id, ifp->name,
			   prefix2str(p, buf, sizeof(buf)));
	}
	rib_update(ifp->vrf_id, RIB_UPDATE_IF_CHANGE);

	/* Schedule LSP forwarding entries for processing, if appropriate. */
	if (ifp->vrf_id == VRF_DEFAULT) {
		if (IS_ZEBRA_DEBUG_MPLS) {
			char buf[PREFIX_STRLEN];

			zlog_debug("%u: IF %s IP %s address delete, scheduling MPLS processing",
				   ifp->vrf_id, ifp->name,
				   prefix2str(p, buf, sizeof(buf)));
		}
		mpls_mark_lsps_for_processing(vrf_info_lookup(ifp->vrf_id));
	}
}

/* Delete connected IPv4 route to the interface. */
void connected_delete_ipv4(struct interface *ifp, int flags,
			   struct in_addr *addr, u_char prefixlen,
			   struct in_addr *broad)
{
	struct prefix p, d;
	struct connected *ifc;

	memset(&p, 0, sizeof(struct prefix));
	p.family = AF_INET;
	p.u.prefix4 = *addr;
	p.prefixlen = CHECK_FLAG(flags, ZEBRA_IFA_PEER) ? IPV4_MAX_PREFIXLEN
							: prefixlen;

	if (broad) {
		memset(&d, 0, sizeof(struct prefix));
		d.family = AF_INET;
		d.u.prefix4 = *broad;
		d.prefixlen = prefixlen;
		ifc = connected_check_ptp(ifp, &p, &d);
	} else
		ifc = connected_check_ptp(ifp, &p, NULL);

	connected_delete_helper(ifc, &p);
}

/* Add connected IPv6 route to the interface. */
void connected_add_ipv6(struct interface *ifp, int flags, struct in6_addr *addr,
			u_char prefixlen, const char *label)
{
	struct prefix_ipv6 *p;
	struct connected *ifc;

	if (ipv6_martian(addr))
		return;

	/* Make connected structure. */
	ifc = connected_new();
	ifc->ifp = ifp;
	ifc->flags = flags;
	/* If we get a notification from the kernel,
	 * we can safely assume the address is known to the kernel */
	SET_FLAG(ifc->conf, ZEBRA_IFC_QUEUED);

	/* Allocate new connected address. */
	p = prefix_ipv6_new();
	p->family = AF_INET6;
	IPV6_ADDR_COPY(&p->prefix, addr);
	p->prefixlen = prefixlen;
	ifc->address = (struct prefix *)p;

	/* Label of this address. */
	if (label)
		ifc->label = XSTRDUP(MTYPE_CONNECTED_LABEL, label);

	/* On Linux, we only get here when DAD is complete, therefore we can set
	 * ZEBRA_IFC_REAL.
	 *
	 * On BSD, there currently doesn't seem to be a way to check for
	 * completion of
	 * DAD, so we replicate the old behaviour and set ZEBRA_IFC_REAL,
	 * although DAD
	 * might still be running.
	 */
	SET_FLAG(ifc->conf, ZEBRA_IFC_REAL);
	connected_update(ifp, ifc);
}

void connected_delete_ipv6(struct interface *ifp, struct in6_addr *address,
			   u_char prefixlen)
{
	struct prefix p;
	struct connected *ifc;

	memset(&p, 0, sizeof(struct prefix));
	p.family = AF_INET6;
	memcpy(&p.u.prefix6, address, sizeof(struct in6_addr));
	p.prefixlen = prefixlen;

	ifc = connected_check(ifp, &p);

	connected_delete_helper(ifc, &p);
}

int connected_is_unnumbered(struct interface *ifp)
{
	struct connected *connected;
	struct listnode *node;

	for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, connected)) {
		if (CHECK_FLAG(connected->conf, ZEBRA_IFC_REAL)
		    && connected->address->family == AF_INET)
			return CHECK_FLAG(connected->flags,
					  ZEBRA_IFA_UNNUMBERED);
	}
	return 0;
}
Commit	Line	Data
718e3744	1	/*
	2	* Address linked list routine.
	3	* Copyright (C) 1997, 98 Kunihiro Ishiguro
	4	*
	5	* This file is part of GNU Zebra.
	6	*
	7	* GNU Zebra is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2, or (at your option) any
	10	* later version.
	11	*
	12	* GNU Zebra is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
896014f4 DL	17	* You should have received a copy of the GNU General Public License along
	18	* with this program; see the file COPYING; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
718e3744	20	*/
	21
	22	#include <zebra.h>
	23
	24	#include "prefix.h"
	25	#include "linklist.h"
	26	#include "if.h"
	27	#include "table.h"
	28	#include "rib.h"
	29	#include "table.h"
	30	#include "log.h"
0752ef0b	31	#include "memory.h"
4a1ab8e4	32	#include "zebra_memory.h"
718e3744	33
82f97584	34	#include "vty.h"
b84c7253	35	#include "zebra/debug.h"
718e3744	36	#include "zebra/zserv.h"
718e3744	37	#include "zebra/redistribute.h"
eef1fe11	38	#include "zebra/interface.h"
a1ac18c4	39	#include "zebra/connected.h"
b6120505	40	#include "zebra/rtadv.h"
40c7bdb0	41	#include "zebra/zebra_mpls.h"
939fba27	42	#include "zebra/debug.h"
6b0655a2	43
02b4805f	44	/* communicate the withdrawal of a connected address */
d62a17ae	45	static void connected_withdraw(struct connected *ifc)
ca16218d	46	{
d62a17ae	47	if (!ifc)
d62a17ae	48	return;
ca16218d	49
d62a17ae	50	/* Update interface address information to protocol daemon. */
	51	if (CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL)) {
	52	zebra_interface_address_delete_update(ifc->ifp, ifc);
ca16218d	53
d62a17ae	54	if (ifc->address->family == AF_INET)
d62a17ae	55	if_subnet_delete(ifc->ifp, ifc);
9db047fc	56
11461c63	57	connected_down(ifc->ifp, ifc);
ca16218d	58
d62a17ae	59	UNSET_FLAG(ifc->conf, ZEBRA_IFC_REAL);
d62a17ae	60	}
ca16218d	61
d62a17ae	62	/* The address is not in the kernel anymore, so clear the flag */
d62a17ae	63	UNSET_FLAG(ifc->conf, ZEBRA_IFC_QUEUED);
f7f740fe	64
d62a17ae	65	if (!CHECK_FLAG(ifc->conf, ZEBRA_IFC_CONFIGURED)) {
	66	listnode_delete(ifc->ifp->connected, ifc);
	67	connected_free(ifc);
	68	}
ca16218d	69	}
ca16218d	70
d62a17ae	71	static void connected_announce(struct interface ifp, struct connected ifc)
ca16218d	72	{
d62a17ae	73	if (!ifc)
	74	return;
	75
	76	if (!if_is_loopback(ifp) && ifc->address->family == AF_INET) {
	77	if (ifc->address->prefixlen == 32)
	78	SET_FLAG(ifc->flags, ZEBRA_IFA_UNNUMBERED);
	79	else
	80	UNSET_FLAG(ifc->flags, ZEBRA_IFA_UNNUMBERED);
	81	}
	82
	83	listnode_add(ifp->connected, ifc);
	84
	85	/* Update interface address information to protocol daemon. */
	86	if (ifc->address->family == AF_INET)
	87	if_subnet_add(ifp, ifc);
	88
	89	zebra_interface_address_add_update(ifp, ifc);
	90
	91	if (if_is_operative(ifp)) {
ae87977c	92	connected_up(ifp, ifc);
d62a17ae	93	}
ca16218d	94	}
6b0655a2	95
718e3744	96	/* If same interface address is already exist... */
abffde07 DL	97	struct connected connected_check(struct interface ifp,
abffde07 DL	98	union prefixconstptr pu)
718e3744	99	{
abffde07	100	const struct prefix *p = pu.p;
d62a17ae	101	struct connected *ifc;
d62a17ae	102	struct listnode *node;
718e3744	103
d62a17ae	104	for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc))
	105	if (prefix_same(ifc->address, p))
	106	return ifc;
718e3744	107
d62a17ae	108	return NULL;
718e3744	109	}
718e3744	110
abffde07 DL	111	/* same, but with peer address */
	112	struct connected connected_check_ptp(struct interface ifp,
	113	union prefixconstptr pu,
	114	union prefixconstptr du)
	115	{
	116	const struct prefix *p = pu.p;
	117	const struct prefix *d = du.p;
	118	struct connected *ifc;
	119	struct listnode *node;
	120
	121	/* ignore broadcast addresses */
	122	if (p->prefixlen != IPV4_MAX_PREFIXLEN)
	123	d = NULL;
	124
	125	for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) {
	126	if (!prefix_same(ifc->address, p))
	127	continue;
	128	if (!CONNECTED_PEER(ifc) && !d)
	129	return ifc;
	130	if (CONNECTED_PEER(ifc) && d
	131	&& prefix_same(ifc->destination, d))
	132	return ifc;
	133	}
	134
	135	return NULL;
	136	}
	137
02b4805f	138	/* Check if two ifc's describe the same address in the same state */
d62a17ae	139	static int connected_same(struct connected ifc1, struct connected ifc2)
74ecdc9e	140	{
d62a17ae	141	if (ifc1->ifp != ifc2->ifp)
	142	return 0;
	143
	144	if (ifc1->destination)
	145	if (!ifc2->destination)
	146	return 0;
	147	if (ifc2->destination)
	148	if (!ifc1->destination)
	149	return 0;
	150
	151	if (ifc1->destination && ifc2->destination)
	152	if (!prefix_same(ifc1->destination, ifc2->destination))
	153	return 0;
	154
	155	if (ifc1->flags != ifc2->flags)
	156	return 0;
	157
	158	if (ifc1->conf != ifc2->conf)
	159	return 0;
	160
	161	return 1;
74ecdc9e PJ	162	}
74ecdc9e PJ	163
d7f5dad6 CF	164	/* Handle changes to addresses and send the neccesary announcements
d7f5dad6 CF	165	* to clients. */
d62a17ae	166	static void connected_update(struct interface ifp, struct connected ifc)
74ecdc9e	167	{
d62a17ae	168	struct connected *current;
	169
	170	/* Check same connected route. */
abffde07 DL	171	current = connected_check_ptp(ifp, ifc->address, ifc->destination);
abffde07 DL	172	if (current) {
d62a17ae	173	if (CHECK_FLAG(current->conf, ZEBRA_IFC_CONFIGURED))
	174	SET_FLAG(ifc->conf, ZEBRA_IFC_CONFIGURED);
	175
	176	/* Avoid spurious withdraws, this might be just the kernel
	177	* 'reflecting'
	178	* back an address we have already added.
	179	*/
	180	if (connected_same(current, ifc)) {
	181	/* nothing to do */
	182	connected_free(ifc);
	183	return;
	184	}
	185
	186	/* Clear the configured flag on the old ifc, so it will be freed
	187	* by
	188	* connected withdraw. */
	189	UNSET_FLAG(current->conf, ZEBRA_IFC_CONFIGURED);
	190	connected_withdraw(
	191	current); /* implicit withdraw - freebsd does this */
	192	}
	193
	194	/* If the connected is new or has changed, announce it, if it is usable
	195	*/
	196	if (CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL))
	197	connected_announce(ifp, ifc);
74ecdc9e PJ	198	}
74ecdc9e PJ	199
718e3744	200	/* Called from if_up(). */
ae87977c	201	void connected_up(struct interface ifp, struct connected ifc)
718e3744	202	{
ae87977c	203	afi_t afi;
d62a17ae	204	struct prefix p;
fd36be7e	205	struct nexthop nh = {
60466a63	206	.type = NEXTHOP_TYPE_IFINDEX, .ifindex = ifp->ifindex,
fd36be7e	207	};
d62a17ae	208
	209	if (!CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL))
	210	return;
	211
ae87977c	212	PREFIX_COPY(&p, CONNECTED_PREFIX(ifc));
d62a17ae	213
	214	/* Apply mask to the network. */
	215	apply_mask(&p);
	216
ae87977c DS	217	afi = family2afi(p.family);
	218
	219	switch (afi) {
	220	case AFI_IP:
	221	/*
	222	* In case of connected address is 0.0.0.0/0 we treat it tunnel
	223	* address.
	224	*/
	225	if (prefix_ipv4_any((struct prefix_ipv4 *)&p))
	226	return;
	227	break;
	228	case AFI_IP6:
	229	#ifndef LINUX
	230	/* XXX: It is already done by rib_bogus_ipv6 within rib_add */
	231	if (IN6_IS_ADDR_UNSPECIFIED(&p.u.prefix6))
	232	return;
	233	#endif
	234	break;
	235	default:
	236	zlog_warn("Received unknown AFI: %s", afi2str(afi));
d62a17ae	237	return;
ae87977c DS	238	break;
ae87977c DS	239	}
d62a17ae	240
8795f904 DS	241	rib_add(afi, SAFI_UNICAST, ifp->vrf_id, ifp->vrf_id,
8795f904 DS	242	ZEBRA_ROUTE_CONNECT, 0, 0,
4e40b6d6	243	&p, NULL, &nh, RT_TABLE_MAIN, ifp->metric, 0, 0, 0);
d62a17ae	244
8795f904 DS	245	rib_add(afi, SAFI_MULTICAST, ifp->vrf_id, ifp->vrf_id,
8795f904 DS	246	ZEBRA_ROUTE_CONNECT, 0, 0,
4e40b6d6	247	&p, NULL, &nh, RT_TABLE_MAIN, ifp->metric, 0, 0, 0);
d62a17ae	248
ae87977c DS	249	if (IS_ZEBRA_DEBUG_RIB_DETAILED) {
	250	char buf[PREFIX_STRLEN];
	251
	252	zlog_debug("%u: IF %s address %s add/up, scheduling RIB processing",
	253	ifp->vrf_id, ifp->name,
	254	prefix2str(&p, buf, sizeof(buf)));
	255	}
d62a17ae	256	rib_update(ifp->vrf_id, RIB_UPDATE_IF_CHANGE);
	257
	258	/* Schedule LSP forwarding entries for processing, if appropriate. */
	259	if (ifp->vrf_id == VRF_DEFAULT) {
ae87977c DS	260	if (IS_ZEBRA_DEBUG_MPLS) {
	261	char buf[PREFIX_STRLEN];
	262
	263	zlog_debug("%u: IF %s IP %s address add/up, scheduling MPLS processing",
	264	ifp->vrf_id, ifp->name,
	265	prefix2str(&p, buf, sizeof(buf)));
	266	}
d62a17ae	267	mpls_mark_lsps_for_processing(vrf_info_lookup(ifp->vrf_id));
d62a17ae	268	}
718e3744	269	}
	270
	271	/* Add connected IPv4 route to the interface. */
d62a17ae	272	void connected_add_ipv4(struct interface ifp, int flags, struct in_addr addr,
	273	u_char prefixlen, struct in_addr *broad,
	274	const char *label)
718e3744	275	{
d62a17ae	276	struct prefix_ipv4 *p;
	277	struct connected *ifc;
	278
	279	if (ipv4_martian(addr))
	280	return;
	281
	282	/* Make connected structure. */
	283	ifc = connected_new();
	284	ifc->ifp = ifp;
	285	ifc->flags = flags;
	286	/* If we get a notification from the kernel,
	287	* we can safely assume the address is known to the kernel */
	288	SET_FLAG(ifc->conf, ZEBRA_IFC_QUEUED);
	289
	290	/* Allocate new connected address. */
	291	p = prefix_ipv4_new();
	292	p->family = AF_INET;
	293	p->prefix = *addr;
abffde07 DL	294	p->prefixlen = CHECK_FLAG(flags, ZEBRA_IFA_PEER) ? IPV4_MAX_PREFIXLEN
abffde07 DL	295	: prefixlen;
d62a17ae	296	ifc->address = (struct prefix *)p;
	297
	298	/* If there is broadcast or peer address. */
	299	if (broad) {
	300	p = prefix_ipv4_new();
	301	p->family = AF_INET;
	302	p->prefix = *broad;
	303	p->prefixlen = prefixlen;
	304	ifc->destination = (struct prefix *)p;
	305
	306	/* validate the destination address */
	307	if (CONNECTED_PEER(ifc)) {
	308	if (IPV4_ADDR_SAME(addr, broad))
	309	zlog_warn(
	310	"warning: interface %s has same local and peer "
	311	"address %s, routing protocols may malfunction",
	312	ifp->name, inet_ntoa(*addr));
	313	} else {
	314	if (broad->s_addr
	315	!= ipv4_broadcast_addr(addr->s_addr, prefixlen)) {
	316	char buf[2][INET_ADDRSTRLEN];
	317	struct in_addr bcalc;
	318	bcalc.s_addr = ipv4_broadcast_addr(addr->s_addr,
	319	prefixlen);
	320	zlog_warn(
	321	"warning: interface %s broadcast addr %s/%d != "
	322	"calculated %s, routing protocols may malfunction",
	323	ifp->name,
	324	inet_ntop(AF_INET, broad, buf[0],
	325	sizeof(buf[0])),
	326	prefixlen,
	327	inet_ntop(AF_INET, &bcalc, buf[1],
	328	sizeof(buf[1])));
	329	}
	330	}
	331
	332	} else {
	333	if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_PEER)) {
	334	zlog_warn(
	335	"warning: %s called for interface %s "
	336	"with peer flag set, but no peer address supplied",
	337	__func__, ifp->name);
	338	UNSET_FLAG(ifc->flags, ZEBRA_IFA_PEER);
	339	}
	340
	341	/* no broadcast or destination address was supplied */
	342	if ((prefixlen == IPV4_MAX_PREFIXLEN) && if_is_pointopoint(ifp))
	343	zlog_warn(
	344	"warning: PtP interface %s with addr %s/%d needs a "
	345	"peer address",
	346	ifp->name, inet_ntoa(*addr), prefixlen);
e4529636 AS	347	}
e4529636 AS	348
d62a17ae	349	/* Label of this address. */
	350	if (label)
	351	ifc->label = XSTRDUP(MTYPE_CONNECTED_LABEL, label);
718e3744	352
d62a17ae	353	/* For all that I know an IPv4 address is always ready when we receive
	354	* the notification. So it should be safe to set the REAL flag here. */
	355	SET_FLAG(ifc->conf, ZEBRA_IFC_REAL);
718e3744	356
d62a17ae	357	connected_update(ifp, ifc);
718e3744	358	}
718e3744	359
11461c63	360	void connected_down(struct interface ifp, struct connected ifc)
718e3744	361	{
11461c63	362	afi_t afi;
d62a17ae	363	struct prefix p;
fd36be7e	364	struct nexthop nh = {
60466a63	365	.type = NEXTHOP_TYPE_IFINDEX, .ifindex = ifp->ifindex,
fd36be7e	366	};
718e3744	367
d62a17ae	368	if (!CHECK_FLAG(ifc->conf, ZEBRA_IFC_REAL))
d62a17ae	369	return;
718e3744	370
11461c63	371	PREFIX_COPY(&p, CONNECTED_PREFIX(ifc));
718e3744	372
d62a17ae	373	/* Apply mask to the network. */
d62a17ae	374	apply_mask(&p);
718e3744	375
11461c63 DS	376	afi = family2afi(p.family);
	377
	378	switch (afi) {
	379	case AFI_IP:
	380	/*
	381	* In case of connected address is 0.0.0.0/0 we treat it tunnel
	382	* address.
	383	*/
	384	if (prefix_ipv4_any((struct prefix_ipv4 *)&p))
	385	return;
	386	break;
	387	case AFI_IP6:
	388	if (IN6_IS_ADDR_UNSPECIFIED(&p.u.prefix6))
	389	return;
	390	break;
	391	default:
	392	zlog_info("Unknown AFI: %s", afi2str(afi));
	393	break;
	394	}
718e3744	395
11461c63 DS	396	/*
	397	* Same logic as for connected_up(): push the changes into the
	398	* head.
	399	*/
	400	rib_delete(afi, SAFI_UNICAST, ifp->vrf_id, ZEBRA_ROUTE_CONNECT, 0, 0,
6134fd82	401	&p, NULL, &nh, 0, 0, false, NULL);
718e3744	402
11461c63	403	rib_delete(afi, SAFI_MULTICAST, ifp->vrf_id, ZEBRA_ROUTE_CONNECT, 0,
6134fd82	404	0, &p, NULL, &nh, 0, 0, false, NULL);
42cb6b66	405
11461c63 DS	406	if (IS_ZEBRA_DEBUG_RIB_DETAILED) {
	407	char buf[PREFIX_STRLEN];
	408
	409	zlog_debug("%u: IF %s IP %s address down, scheduling RIB processing",
	410	ifp->vrf_id, ifp->name,
	411	prefix2str(&p, buf, sizeof(buf)));
	412	}
b84c7253	413
d62a17ae	414	rib_update(ifp->vrf_id, RIB_UPDATE_IF_CHANGE);
40c7bdb0	415
d62a17ae	416	/* Schedule LSP forwarding entries for processing, if appropriate. */
d62a17ae	417	if (ifp->vrf_id == VRF_DEFAULT) {
11461c63 DS	418	if (IS_ZEBRA_DEBUG_MPLS) {
	419	char buf[PREFIX_STRLEN];
	420
b0642798	421	zlog_debug("%u: IF %s IP %s address down, scheduling MPLS processing",
11461c63 DS	422	ifp->vrf_id, ifp->name,
	423	prefix2str(&p, buf, sizeof(buf)));
	424	}
d62a17ae	425	mpls_mark_lsps_for_processing(vrf_info_lookup(ifp->vrf_id));
d62a17ae	426	}
718e3744	427	}
718e3744	428
dc7cd304 DS	429	static void connected_delete_helper(struct connected ifc, struct prefix p)
	430	{
	431	struct interface *ifp;
	432
	433	if (!ifc)
	434	return;
	435	ifp = ifc->ifp;
	436
	437	connected_withdraw(ifc);
	438
	439	if (IS_ZEBRA_DEBUG_RIB_DETAILED) {
	440	char buf[PREFIX_STRLEN];
	441
	442	zlog_debug("%u: IF %s IP %s address del, scheduling RIB processing",
	443	ifp->vrf_id, ifp->name,
	444	prefix2str(p, buf, sizeof(buf)));
	445	}
	446	rib_update(ifp->vrf_id, RIB_UPDATE_IF_CHANGE);
	447
	448	/* Schedule LSP forwarding entries for processing, if appropriate. */
	449	if (ifp->vrf_id == VRF_DEFAULT) {
	450	if (IS_ZEBRA_DEBUG_MPLS) {
	451	char buf[PREFIX_STRLEN];
	452
b0642798	453	zlog_debug("%u: IF %s IP %s address delete, scheduling MPLS processing",
dc7cd304 DS	454	ifp->vrf_id, ifp->name,
	455	prefix2str(p, buf, sizeof(buf)));
	456	}
	457	mpls_mark_lsps_for_processing(vrf_info_lookup(ifp->vrf_id));
	458	}
	459	}
	460
718e3744	461	/* Delete connected IPv4 route to the interface. */
d62a17ae	462	void connected_delete_ipv4(struct interface *ifp, int flags,
	463	struct in_addr *addr, u_char prefixlen,
	464	struct in_addr *broad)
718e3744	465	{
dc7cd304	466	struct prefix p, d;
d62a17ae	467	struct connected *ifc;
d62a17ae	468
dc7cd304	469	memset(&p, 0, sizeof(struct prefix));
d62a17ae	470	p.family = AF_INET;
dc7cd304	471	p.u.prefix4 = *addr;
abffde07 DL	472	p.prefixlen = CHECK_FLAG(flags, ZEBRA_IFA_PEER) ? IPV4_MAX_PREFIXLEN
	473	: prefixlen;
	474
	475	if (broad) {
dc7cd304	476	memset(&d, 0, sizeof(struct prefix));
abffde07	477	d.family = AF_INET;
dc7cd304	478	d.u.prefix4 = *broad;
abffde07	479	d.prefixlen = prefixlen;
dc7cd304	480	ifc = connected_check_ptp(ifp, &p, &d);
abffde07	481	} else
dc7cd304	482	ifc = connected_check_ptp(ifp, &p, NULL);
d62a17ae	483
dc7cd304	484	connected_delete_helper(ifc, &p);
718e3744	485	}
718e3744	486
718e3744	487	/* Add connected IPv6 route to the interface. */
d62a17ae	488	void connected_add_ipv6(struct interface ifp, int flags, struct in6_addr addr,
608105a7	489	u_char prefixlen, const char *label)
718e3744	490	{
d62a17ae	491	struct prefix_ipv6 *p;
	492	struct connected *ifc;
	493
	494	if (ipv6_martian(addr))
	495	return;
	496
	497	/* Make connected structure. */
	498	ifc = connected_new();
	499	ifc->ifp = ifp;
	500	ifc->flags = flags;
	501	/* If we get a notification from the kernel,
	502	* we can safely assume the address is known to the kernel */
	503	SET_FLAG(ifc->conf, ZEBRA_IFC_QUEUED);
	504
	505	/* Allocate new connected address. */
	506	p = prefix_ipv6_new();
	507	p->family = AF_INET6;
	508	IPV6_ADDR_COPY(&p->prefix, addr);
	509	p->prefixlen = prefixlen;
	510	ifc->address = (struct prefix *)p;
	511
d62a17ae	512	/* Label of this address. */
	513	if (label)
	514	ifc->label = XSTRDUP(MTYPE_CONNECTED_LABEL, label);
	515
	516	/* On Linux, we only get here when DAD is complete, therefore we can set
	517	* ZEBRA_IFC_REAL.
	518	*
	519	* On BSD, there currently doesn't seem to be a way to check for
	520	* completion of
	521	* DAD, so we replicate the old behaviour and set ZEBRA_IFC_REAL,
	522	* although DAD
	523	* might still be running.
	524	*/
	525	SET_FLAG(ifc->conf, ZEBRA_IFC_REAL);
	526	connected_update(ifp, ifc);
718e3744	527	}
718e3744	528
d62a17ae	529	void connected_delete_ipv6(struct interface ifp, struct in6_addr address,
608105a7	530	u_char prefixlen)
718e3744	531	{
dc7cd304	532	struct prefix p;
d62a17ae	533	struct connected *ifc;
d62a17ae	534
dc7cd304	535	memset(&p, 0, sizeof(struct prefix));
d62a17ae	536	p.family = AF_INET6;
dc7cd304	537	memcpy(&p.u.prefix6, address, sizeof(struct in6_addr));
d62a17ae	538	p.prefixlen = prefixlen;
d62a17ae	539
dc7cd304	540	ifc = connected_check(ifp, &p);
d62a17ae	541
dc7cd304	542	connected_delete_helper(ifc, &p);
718e3744	543	}
d44ca835	544
d62a17ae	545	int connected_is_unnumbered(struct interface *ifp)
d44ca835	546	{
d62a17ae	547	struct connected *connected;
	548	struct listnode *node;
	549
	550	for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, connected)) {
	551	if (CHECK_FLAG(connected->conf, ZEBRA_IFC_REAL)
	552	&& connected->address->family == AF_INET)
	553	return CHECK_FLAG(connected->flags,
	554	ZEBRA_IFA_UNNUMBERED);
	555	}
	556	return 0;
d44ca835	557	}