Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/ldpd/address.c	Lines:	0	175	0.0 %
Date:	2017-11-13	Branches:	0	89	0.0 %


/*	$OpenBSD: address.c,v 1.35 2017/03/04 00:21:48 renato Exp $ */

/*
 * Copyright (c) 2009 Michele Marchetto <michele@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <string.h>

#include "ldpd.h"
#include "ldpe.h"
#include "lde.h"
#include "log.h"

static void	 send_address(struct nbr *, int, struct if_addr_head *,
		    unsigned int, int);
static int	 gen_address_list_tlv(struct ibuf *, int, struct if_addr_head *,
		    unsigned int);
static int	 gen_mac_list_tlv(struct ibuf *, uint8_t *);
static void	 address_list_add(struct if_addr_head *, struct if_addr *);
static void	 address_list_clr(struct if_addr_head *);
static void	 log_msg_address(int, uint16_t, struct nbr *, int,
		    union ldpd_addr *);
static void	 log_msg_mac_withdrawal(int, struct nbr *, uint8_t *);

static void
send_address(struct nbr *nbr, int af, struct if_addr_head *addr_list,
    unsigned int addr_count, int withdraw)
{
	struct ibuf	*buf;
	uint16_t	 msg_type;
	uint8_t		 addr_size;
	struct if_addr	*if_addr;
	uint16_t	 size;
	unsigned int	 tlv_addr_count = 0;
	int		 err = 0;

	/* nothing to send */
	if (LIST_EMPTY(addr_list))
		return;

	if (!withdraw)
		msg_type = MSG_TYPE_ADDR;
	else
		msg_type = MSG_TYPE_ADDRWITHDRAW;

	switch (af) {
	case AF_INET:
		addr_size = sizeof(struct in_addr);
		break;
	case AF_INET6:
		addr_size = sizeof(struct in6_addr);
		break;
	default:
		fatalx("send_address: unknown af");
	}

	while ((if_addr = LIST_FIRST(addr_list)) != NULL) {
		/*
		 * Send as many addresses as possible - respect the session's
		 * negotiated maximum pdu length.
		 */
		size = LDP_HDR_SIZE + LDP_MSG_SIZE + ADDR_LIST_SIZE;
		if (size + addr_count * addr_size <= nbr->max_pdu_len)
			tlv_addr_count = addr_count;
		else
			tlv_addr_count = (nbr->max_pdu_len - size) / addr_size;
		size += tlv_addr_count * addr_size;
		addr_count -= tlv_addr_count;

		if ((buf = ibuf_open(size)) == NULL)
			fatal(__func__);

		err |= gen_ldp_hdr(buf, size);
		size -= LDP_HDR_SIZE;
		err |= gen_msg_hdr(buf, msg_type, size);
		size -= LDP_MSG_SIZE;
		err |= gen_address_list_tlv(buf, af, addr_list, tlv_addr_count);
		if (err) {
			address_list_clr(addr_list);
			ibuf_free(buf);
			return;
		}

		while ((if_addr = LIST_FIRST(addr_list)) != NULL) {
			log_msg_address(1, msg_type, nbr, af, &if_addr->addr);

			LIST_REMOVE(if_addr, entry);
			free(if_addr);
			if (--tlv_addr_count == 0)
				break;
		}

		evbuf_enqueue(&nbr->tcp->wbuf, buf);
	}

	nbr_fsm(nbr, NBR_EVT_PDU_SENT);
}

void
send_address_single(struct nbr *nbr, struct if_addr *if_addr, int withdraw)
{
	struct if_addr_head	 addr_list;

	LIST_INIT(&addr_list);
	address_list_add(&addr_list, if_addr);
	send_address(nbr, if_addr->af, &addr_list, 1, withdraw);
}

void
send_address_all(struct nbr *nbr, int af)
{
	struct if_addr_head	 addr_list;
	struct if_addr		*if_addr;
	unsigned int		 addr_count = 0;

	LIST_INIT(&addr_list);
	LIST_FOREACH(if_addr, &global.addr_list, entry) {
		if (if_addr->af != af)
			continue;

		address_list_add(&addr_list, if_addr);
		addr_count++;
	}

	send_address(nbr, af, &addr_list, addr_count, 0);
}

void
send_mac_withdrawal(struct nbr *nbr, struct map *fec, uint8_t *mac)
{
	struct ibuf	*buf;
	uint16_t	 size;
	int		 err;

	size = LDP_HDR_SIZE + LDP_MSG_SIZE + ADDR_LIST_SIZE + len_fec_tlv(fec) +
	    TLV_HDR_SIZE;
	if (mac)
		size += ETHER_ADDR_LEN;

	if ((buf = ibuf_open(size)) == NULL)
		fatal(__func__);

	err = gen_ldp_hdr(buf, size);
	size -= LDP_HDR_SIZE;
	err |= gen_msg_hdr(buf, MSG_TYPE_ADDRWITHDRAW, size);
	size -= LDP_MSG_SIZE;
	err |= gen_address_list_tlv(buf, AF_INET, NULL, 0);
	err |= gen_fec_tlv(buf, fec);
	err |= gen_mac_list_tlv(buf, mac);
	if (err) {
		ibuf_free(buf);
		return;
	}

	log_msg_mac_withdrawal(1, nbr, mac);

	evbuf_enqueue(&nbr->tcp->wbuf, buf);

	nbr_fsm(nbr, NBR_EVT_PDU_SENT);
}

int
recv_address(struct nbr *nbr, char *buf, uint16_t len)
{
	struct ldp_msg		msg;
	uint16_t		msg_type;
	enum imsg_type		type;
	struct address_list_tlv	alt;
	uint16_t		alt_len;
	uint16_t		alt_family;
	struct lde_addr		lde_addr;

	memcpy(&msg, buf, sizeof(msg));
	msg_type = ntohs(msg.type);
	switch (msg_type) {
	case MSG_TYPE_ADDR:
		type = IMSG_ADDRESS_ADD;
		break;
	case MSG_TYPE_ADDRWITHDRAW:
		type = IMSG_ADDRESS_DEL;
		break;
	default:
		fatalx("recv_address: unexpected msg type");
	}
	buf += LDP_MSG_SIZE;
	len -= LDP_MSG_SIZE;

	/* Address List TLV */
	if (len < ADDR_LIST_SIZE) {
		session_shutdown(nbr, S_BAD_MSG_LEN, msg.id, msg.type);
		return (-1);
	}
	memcpy(&alt, buf, sizeof(alt));
	alt_len = ntohs(alt.length);
	alt_family = ntohs(alt.family);
	if (alt_len > len - TLV_HDR_SIZE) {
		session_shutdown(nbr, S_BAD_TLV_LEN, msg.id, msg.type);
		return (-1);
	}
	if (ntohs(alt.type) != TLV_TYPE_ADDRLIST) {
		send_notification(nbr->tcp, S_MISS_MSG, msg.id, msg.type);
		return (-1);
	}
	switch (alt_family) {
	case AF_IPV4:
		if (!nbr->v4_enabled)
			/* just ignore the message */
			return (0);
		break;
	case AF_IPV6:
		if (!nbr->v6_enabled)
			/* just ignore the message */
			return (0);
		break;
	default:
		send_notification(nbr->tcp, S_UNSUP_ADDR, msg.id, msg.type);
		return (-1);
	}
	alt_len -= sizeof(alt.family);
	buf += sizeof(alt);
	len -= sizeof(alt);

	/* Process all received addresses */
	while (alt_len > 0) {
		switch (alt_family) {
		case AF_IPV4:
			if (alt_len < sizeof(struct in_addr)) {
				session_shutdown(nbr, S_BAD_TLV_LEN, msg.id,
				    msg.type);
				return (-1);
			}

			memset(&lde_addr, 0, sizeof(lde_addr));
			lde_addr.af = AF_INET;
			memcpy(&lde_addr.addr, buf, sizeof(struct in_addr));

			buf += sizeof(struct in_addr);
			len -= sizeof(struct in_addr);
			alt_len -= sizeof(struct in_addr);
			break;
		case AF_IPV6:
			if (alt_len < sizeof(struct in6_addr)) {
				session_shutdown(nbr, S_BAD_TLV_LEN, msg.id,
				    msg.type);
				return (-1);
			}

			memset(&lde_addr, 0, sizeof(lde_addr));
			lde_addr.af = AF_INET6;
			memcpy(&lde_addr.addr, buf, sizeof(struct in6_addr));

			buf += sizeof(struct in6_addr);
			len -= sizeof(struct in6_addr);
			alt_len -= sizeof(struct in6_addr);
			break;
		default:
			fatalx("recv_address: unknown af");
		}

		log_msg_address(0, msg_type, nbr, lde_addr.af, &lde_addr.addr);

		ldpe_imsg_compose_lde(type, nbr->peerid, 0, &lde_addr,
		    sizeof(lde_addr));
	}

	/* Optional Parameters */
	while (len > 0) {
		struct tlv 	tlv;
		uint16_t	tlv_type;
		uint16_t	tlv_len;

		if (len < sizeof(tlv)) {
			session_shutdown(nbr, S_BAD_TLV_LEN, msg.id, msg.type);
			return (-1);
		}

		memcpy(&tlv, buf, TLV_HDR_SIZE);
		tlv_type = ntohs(tlv.type);
		tlv_len = ntohs(tlv.length);
		if (tlv_len + TLV_HDR_SIZE > len) {
			session_shutdown(nbr, S_BAD_TLV_LEN, msg.id, msg.type);
			return (-1);
		}
		buf += TLV_HDR_SIZE;
		len -= TLV_HDR_SIZE;

		switch (tlv_type) {
		default:
			if (!(ntohs(tlv.type) & UNKNOWN_FLAG))
				send_notification_rtlvs(nbr, S_UNKNOWN_TLV,
				    msg.id, msg.type, tlv_type, tlv_len, buf);
			/* ignore unknown tlv */
			break;
		}
		buf += tlv_len;
		len -= tlv_len;
	}

	return (0);
}

static int
gen_address_list_tlv(struct ibuf *buf, int af, struct if_addr_head *addr_list,
    unsigned int tlv_addr_count)
{
	struct address_list_tlv	 alt;
	uint16_t		 addr_size;
	struct if_addr		*if_addr;
	int			 err = 0;

	memset(&alt, 0, sizeof(alt));
	alt.type = htons(TLV_TYPE_ADDRLIST);

	switch (af) {
	case AF_INET:
		alt.family = htons(AF_IPV4);
		addr_size = sizeof(struct in_addr);
		break;
	case AF_INET6:
		alt.family = htons(AF_IPV6);
		addr_size = sizeof(struct in6_addr);
		break;
	default:
		fatalx("gen_address_list_tlv: unknown af");
	}
	alt.length = htons(sizeof(alt.family) + addr_size * tlv_addr_count);

	err |= ibuf_add(buf, &alt, sizeof(alt));
	if (addr_list == NULL)
		return (err);

	LIST_FOREACH(if_addr, addr_list, entry) {
		err |= ibuf_add(buf, &if_addr->addr, addr_size);
		if (--tlv_addr_count == 0)
			break;
	}

	return (err);
}

static int
gen_mac_list_tlv(struct ibuf *buf, uint8_t *mac)
{
	struct tlv	 tlv;
	int		 err;

	memset(&tlv, 0, sizeof(tlv));
	tlv.type = htons(TLV_TYPE_MAC_LIST);
	if (mac)
		tlv.length = htons(ETHER_ADDR_LEN);
	err = ibuf_add(buf, &tlv, sizeof(tlv));
	if (mac)
		err |= ibuf_add(buf, mac, ETHER_ADDR_LEN);

	return (err);
}

static void
address_list_add(struct if_addr_head *addr_list, struct if_addr *if_addr)
{
	struct if_addr		*new;

	new = malloc(sizeof(*new));
	if (new == NULL)
		fatal(__func__);
	*new = *if_addr;

	LIST_INSERT_HEAD(addr_list, new, entry);
}

static void
address_list_clr(struct if_addr_head *addr_list)
{
	struct if_addr		*if_addr;

	while ((if_addr = LIST_FIRST(addr_list)) != NULL) {
		LIST_REMOVE(if_addr, entry);
		free(if_addr);
	}
}

static void
log_msg_address(int out, uint16_t msg_type, struct nbr *nbr, int af,
    union ldpd_addr *addr)
{
	log_debug("msg-%s: %s: lsr-id %s, address %s", (out) ? "out" : "in",
	    msg_name(msg_type), inet_ntoa(nbr->id), log_addr(af, addr));
}

static void
log_msg_mac_withdrawal(int out, struct nbr *nbr, uint8_t *mac)
{
	log_debug("msg-%s: mac withdrawal: lsr-id %s, mac %s",
	    (out) ? "out" : "in", inet_ntoa(nbr->id),
	    (mac) ? ether_ntoa((struct ether_addr *)mac) : "wildcard");
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: address.c,v 1.35 2017/03/04 00:21:48 renato Exp $ */
2
3			/*
4			* Copyright (c) 2009 Michele Marchetto <michele@openbsd.org>
5			*
6			* Permission to use, copy, modify, and distribute this software for any
7			* purpose with or without fee is hereby granted, provided that the above
8			* copyright notice and this permission notice appear in all copies.
9			*
10			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17			*/
18
19			#include <sys/types.h>
20			#include <arpa/inet.h>
21			#include <stdlib.h>
22			#include <string.h>
23
24			#include "ldpd.h"
25			#include "ldpe.h"
26			#include "lde.h"
27			#include "log.h"
28
29			static void send_address(struct nbr , int, struct if_addr_head ,
30			unsigned int, int);
31			static int gen_address_list_tlv(struct ibuf , int, struct if_addr_head ,
32			unsigned int);
33			static int gen_mac_list_tlv(struct ibuf , uint8_t );
34			static void address_list_add(struct if_addr_head , struct if_addr );
35			static void address_list_clr(struct if_addr_head *);
36			static void log_msg_address(int, uint16_t, struct nbr *, int,
37			union ldpd_addr *);
38			static void log_msg_mac_withdrawal(int, struct nbr , uint8_t );
39
40			static void
41			send_address(struct nbr nbr, int af, struct if_addr_head addr_list,
42			unsigned int addr_count, int withdraw)
43			{
44			struct ibuf *buf;
45			uint16_t msg_type;
46			uint8_t addr_size;
47			struct if_addr *if_addr;
48			uint16_t size;
49			unsigned int tlv_addr_count = 0;
50			int err = 0;
51
52			/* nothing to send */
53			if (LIST_EMPTY(addr_list))
54			return;
55
56			if (!withdraw)
57			msg_type = MSG_TYPE_ADDR;
58			else
59			msg_type = MSG_TYPE_ADDRWITHDRAW;
60
61			switch (af) {
62			case AF_INET:
63			addr_size = sizeof(struct in_addr);
64			break;
65			case AF_INET6:
66			addr_size = sizeof(struct in6_addr);
67			break;
68			default:
69			fatalx("send_address: unknown af");
70			}
71
72			while ((if_addr = LIST_FIRST(addr_list)) != NULL) {
73			/*
74			* Send as many addresses as possible - respect the session's
75			* negotiated maximum pdu length.
76			*/
77			size = LDP_HDR_SIZE + LDP_MSG_SIZE + ADDR_LIST_SIZE;
78			if (size + addr_count * addr_size <= nbr->max_pdu_len)
79			tlv_addr_count = addr_count;
80			else
81			tlv_addr_count = (nbr->max_pdu_len - size) / addr_size;
82			size += tlv_addr_count * addr_size;
83			addr_count -= tlv_addr_count;
84
85			if ((buf = ibuf_open(size)) == NULL)
86			fatal(__func__);
87
88			err \|= gen_ldp_hdr(buf, size);
89			size -= LDP_HDR_SIZE;
90			err \|= gen_msg_hdr(buf, msg_type, size);
91			size -= LDP_MSG_SIZE;
92			err \|= gen_address_list_tlv(buf, af, addr_list, tlv_addr_count);
93			if (err) {
94			address_list_clr(addr_list);
95			ibuf_free(buf);
96			return;
97			}
98
99			while ((if_addr = LIST_FIRST(addr_list)) != NULL) {
100			log_msg_address(1, msg_type, nbr, af, &if_addr->addr);
101
102			LIST_REMOVE(if_addr, entry);
103			free(if_addr);
104			if (--tlv_addr_count == 0)
105			break;
106			}
107
108			evbuf_enqueue(&nbr->tcp->wbuf, buf);
109			}
110
111			nbr_fsm(nbr, NBR_EVT_PDU_SENT);
112			}
113
114			void
115			send_address_single(struct nbr nbr, struct if_addr if_addr, int withdraw)
116			{
117			struct if_addr_head addr_list;
118
119			LIST_INIT(&addr_list);
120			address_list_add(&addr_list, if_addr);
121			send_address(nbr, if_addr->af, &addr_list, 1, withdraw);
122			}
123
124			void
125			send_address_all(struct nbr *nbr, int af)
126			{
127			struct if_addr_head addr_list;
128			struct if_addr *if_addr;
129			unsigned int addr_count = 0;
130
131			LIST_INIT(&addr_list);
132			LIST_FOREACH(if_addr, &global.addr_list, entry) {
133			if (if_addr->af != af)
134			continue;
135
136			address_list_add(&addr_list, if_addr);
137			addr_count++;
138			}
139
140			send_address(nbr, af, &addr_list, addr_count, 0);
141			}
142
143			void
144			send_mac_withdrawal(struct nbr nbr, struct map fec, uint8_t *mac)
145			{
146			struct ibuf *buf;
147			uint16_t size;
148			int err;
149
150			size = LDP_HDR_SIZE + LDP_MSG_SIZE + ADDR_LIST_SIZE + len_fec_tlv(fec) +
151			TLV_HDR_SIZE;
152			if (mac)
153			size += ETHER_ADDR_LEN;
154
155			if ((buf = ibuf_open(size)) == NULL)
156			fatal(__func__);
157
158			err = gen_ldp_hdr(buf, size);
159			size -= LDP_HDR_SIZE;
160			err \|= gen_msg_hdr(buf, MSG_TYPE_ADDRWITHDRAW, size);
161			size -= LDP_MSG_SIZE;
162			err \|= gen_address_list_tlv(buf, AF_INET, NULL, 0);
163			err \|= gen_fec_tlv(buf, fec);
164			err \|= gen_mac_list_tlv(buf, mac);
165			if (err) {
166			ibuf_free(buf);
167			return;
168			}
169
170			log_msg_mac_withdrawal(1, nbr, mac);
171
172			evbuf_enqueue(&nbr->tcp->wbuf, buf);
173
174			nbr_fsm(nbr, NBR_EVT_PDU_SENT);
175			}
176
177			int
178			recv_address(struct nbr nbr, char buf, uint16_t len)
179			{
180			struct ldp_msg msg;
181			uint16_t msg_type;
182			enum imsg_type type;
183			struct address_list_tlv alt;
184			uint16_t alt_len;
185			uint16_t alt_family;
186			struct lde_addr lde_addr;
187
188			memcpy(&msg, buf, sizeof(msg));
189			msg_type = ntohs(msg.type);
190			switch (msg_type) {
191			case MSG_TYPE_ADDR:
192			type = IMSG_ADDRESS_ADD;
193			break;
194			case MSG_TYPE_ADDRWITHDRAW:
195			type = IMSG_ADDRESS_DEL;
196			break;
197			default:
198			fatalx("recv_address: unexpected msg type");
199			}
200			buf += LDP_MSG_SIZE;
201			len -= LDP_MSG_SIZE;
202
203			/* Address List TLV */
204			if (len < ADDR_LIST_SIZE) {
205			session_shutdown(nbr, S_BAD_MSG_LEN, msg.id, msg.type);
206			return (-1);
207			}
208			memcpy(&alt, buf, sizeof(alt));
209			alt_len = ntohs(alt.length);
210			alt_family = ntohs(alt.family);
211			if (alt_len > len - TLV_HDR_SIZE) {
212			session_shutdown(nbr, S_BAD_TLV_LEN, msg.id, msg.type);
213			return (-1);
214			}
215			if (ntohs(alt.type) != TLV_TYPE_ADDRLIST) {
216			send_notification(nbr->tcp, S_MISS_MSG, msg.id, msg.type);
217			return (-1);
218			}
219			switch (alt_family) {
220			case AF_IPV4:
221			if (!nbr->v4_enabled)
222			/* just ignore the message */
223			return (0);
224			break;
225			case AF_IPV6:
226			if (!nbr->v6_enabled)
227			/* just ignore the message */
228			return (0);
229			break;
230			default:
231			send_notification(nbr->tcp, S_UNSUP_ADDR, msg.id, msg.type);
232			return (-1);
233			}
234			alt_len -= sizeof(alt.family);
235			buf += sizeof(alt);
236			len -= sizeof(alt);
237
238			/* Process all received addresses */
239			while (alt_len > 0) {
240			switch (alt_family) {
241			case AF_IPV4:
242			if (alt_len < sizeof(struct in_addr)) {
243			session_shutdown(nbr, S_BAD_TLV_LEN, msg.id,
244			msg.type);
245			return (-1);
246			}
247
248			memset(&lde_addr, 0, sizeof(lde_addr));
249			lde_addr.af = AF_INET;
250			memcpy(&lde_addr.addr, buf, sizeof(struct in_addr));
251
252			buf += sizeof(struct in_addr);
253			len -= sizeof(struct in_addr);
254			alt_len -= sizeof(struct in_addr);
255			break;
256			case AF_IPV6:
257			if (alt_len < sizeof(struct in6_addr)) {
258			session_shutdown(nbr, S_BAD_TLV_LEN, msg.id,
259			msg.type);
260			return (-1);
261			}
262
263			memset(&lde_addr, 0, sizeof(lde_addr));
264			lde_addr.af = AF_INET6;
265			memcpy(&lde_addr.addr, buf, sizeof(struct in6_addr));
266
267			buf += sizeof(struct in6_addr);
268			len -= sizeof(struct in6_addr);
269			alt_len -= sizeof(struct in6_addr);
270			break;
271			default:
272			fatalx("recv_address: unknown af");
273			}
274
275			log_msg_address(0, msg_type, nbr, lde_addr.af, &lde_addr.addr);
276
277			ldpe_imsg_compose_lde(type, nbr->peerid, 0, &lde_addr,
278			sizeof(lde_addr));
279			}
280
281			/* Optional Parameters */
282			while (len > 0) {
283			struct tlv tlv;
284			uint16_t tlv_type;
285			uint16_t tlv_len;
286
287			if (len < sizeof(tlv)) {
288			session_shutdown(nbr, S_BAD_TLV_LEN, msg.id, msg.type);
289			return (-1);
290			}
291
292			memcpy(&tlv, buf, TLV_HDR_SIZE);
293			tlv_type = ntohs(tlv.type);
294			tlv_len = ntohs(tlv.length);
295			if (tlv_len + TLV_HDR_SIZE > len) {
296			session_shutdown(nbr, S_BAD_TLV_LEN, msg.id, msg.type);
297			return (-1);
298			}
299			buf += TLV_HDR_SIZE;
300			len -= TLV_HDR_SIZE;
301
302			switch (tlv_type) {
303			default:
304			if (!(ntohs(tlv.type) & UNKNOWN_FLAG))
305			send_notification_rtlvs(nbr, S_UNKNOWN_TLV,
306			msg.id, msg.type, tlv_type, tlv_len, buf);
307			/* ignore unknown tlv */
308			break;
309			}
310			buf += tlv_len;
311			len -= tlv_len;
312			}
313
314			return (0);
315			}
316
317			static int
318			gen_address_list_tlv(struct ibuf buf, int af, struct if_addr_head addr_list,
319			unsigned int tlv_addr_count)
320			{
321			struct address_list_tlv alt;
322			uint16_t addr_size;
323			struct if_addr *if_addr;
324			int err = 0;
325
326			memset(&alt, 0, sizeof(alt));
327			alt.type = htons(TLV_TYPE_ADDRLIST);
328
329			switch (af) {
330			case AF_INET:
331			alt.family = htons(AF_IPV4);
332			addr_size = sizeof(struct in_addr);
333			break;
334			case AF_INET6:
335			alt.family = htons(AF_IPV6);
336			addr_size = sizeof(struct in6_addr);
337			break;
338			default:
339			fatalx("gen_address_list_tlv: unknown af");
340			}
341			alt.length = htons(sizeof(alt.family) + addr_size * tlv_addr_count);
342
343			err \|= ibuf_add(buf, &alt, sizeof(alt));
344			if (addr_list == NULL)
345			return (err);
346
347			LIST_FOREACH(if_addr, addr_list, entry) {
348			err \|= ibuf_add(buf, &if_addr->addr, addr_size);
349			if (--tlv_addr_count == 0)
350			break;
351			}
352
353			return (err);
354			}
355
356			static int
357			gen_mac_list_tlv(struct ibuf buf, uint8_t mac)
358			{
359			struct tlv tlv;
360			int err;
361
362			memset(&tlv, 0, sizeof(tlv));
363			tlv.type = htons(TLV_TYPE_MAC_LIST);
364			if (mac)
365			tlv.length = htons(ETHER_ADDR_LEN);
366			err = ibuf_add(buf, &tlv, sizeof(tlv));
367			if (mac)
368			err \|= ibuf_add(buf, mac, ETHER_ADDR_LEN);
369
370			return (err);
371			}
372
373			static void
374			address_list_add(struct if_addr_head addr_list, struct if_addr if_addr)
375			{
376			struct if_addr *new;
377
378			new = malloc(sizeof(*new));
379			if (new == NULL)
380			fatal(__func__);
381			new = if_addr;
382
383			LIST_INSERT_HEAD(addr_list, new, entry);
384			}
385
386			static void
387			address_list_clr(struct if_addr_head *addr_list)
388			{
389			struct if_addr *if_addr;
390
391			while ((if_addr = LIST_FIRST(addr_list)) != NULL) {
392			LIST_REMOVE(if_addr, entry);
393			free(if_addr);
394			}
395			}
396
397			static void
398			log_msg_address(int out, uint16_t msg_type, struct nbr *nbr, int af,
399			union ldpd_addr *addr)
400			{
401			log_debug("msg-%s: %s: lsr-id %s, address %s", (out) ? "out" : "in",
402			msg_name(msg_type), inet_ntoa(nbr->id), log_addr(af, addr));
403			}
404
405			static void
406			log_msg_mac_withdrawal(int out, struct nbr nbr, uint8_t mac)
407			{
408			log_debug("msg-%s: mac withdrawal: lsr-id %s, mac %s",
409			(out) ? "out" : "in", inet_ntoa(nbr->id),
410			(mac) ? ether_ntoa((struct ether_addr *)mac) : "wildcard");
411			}