nm-lldp-listener.c 27.7 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
 *
 * This program 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 of the License, or
 * (at your option) any later version.
 *
 * This program 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; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Copyright (C) 2015 Red Hat, Inc.
 */

21
#include "nm-default.h"
22

23 24
#include "nm-lldp-listener.h"

25 26
#include <net/ethernet.h>

27
#include "platform/nm-platform.h"
28 29
#include "nm-utils.h"

30
#include "systemd/nm-sd.h"
31

32
#define MAX_NEIGHBORS         4096
33
#define MIN_UPDATE_INTERVAL_NS (2 * NM_UTILS_NS_PER_SECOND)
34

35 36 37 38
#define LLDP_MAC_NEAREST_BRIDGE          ((const struct ether_addr *) ((uint8_t[ETH_ALEN]) { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x0e }))
#define LLDP_MAC_NEAREST_NON_TPMR_BRIDGE ((const struct ether_addr *) ((uint8_t[ETH_ALEN]) { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 }))
#define LLDP_MAC_NEAREST_CUSTOMER_BRIDGE ((const struct ether_addr *) ((uint8_t[ETH_ALEN]) { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 }))

39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67
typedef enum {
	LLDP_ATTR_TYPE_NONE,
	LLDP_ATTR_TYPE_UINT32,
	LLDP_ATTR_TYPE_STRING,
} LldpAttrType;

typedef enum {
	/* the order of the enum values determines the order of the fields in
	 * the variant. */
	LLDP_ATTR_ID_PORT_DESCRIPTION,
	LLDP_ATTR_ID_SYSTEM_NAME,
	LLDP_ATTR_ID_SYSTEM_DESCRIPTION,
	LLDP_ATTR_ID_SYSTEM_CAPABILITIES,
	LLDP_ATTR_ID_IEEE_802_1_PVID,
	LLDP_ATTR_ID_IEEE_802_1_PPVID,
	LLDP_ATTR_ID_IEEE_802_1_PPVID_FLAGS,
	LLDP_ATTR_ID_IEEE_802_1_VID,
	LLDP_ATTR_ID_IEEE_802_1_VLAN_NAME,
	_LLDP_PROP_ID_COUNT,
} LldpAttrId;

typedef struct {
	LldpAttrType attr_type;
	union {
		guint32 v_uint32;
		char *v_string;
	};
} LldpAttrData;

68 69 70 71 72 73
/*****************************************************************************/

NM_GOBJECT_PROPERTIES_DEFINE (NMLldpListener,
	PROP_NEIGHBORS,
);

74 75 76 77 78
typedef struct {
	char         *iface;
	int           ifindex;
	sd_lldp      *lldp_handle;
	GHashTable   *lldp_neighbors;
79 80 81 82 83

	/* the timestamp in nsec until which we delay updates. */
	gint64        ratelimit_next;
	guint         ratelimit_id;

84 85 86
	GVariant     *variant;
} NMLldpListenerPrivate;

87 88 89 90 91 92 93 94
struct _NMLldpListener {
	GObject parent;
	NMLldpListenerPrivate _priv;
};

struct _NMLldpListenerClass {
	GObjectClass parent;
};
95 96 97

G_DEFINE_TYPE (NMLldpListener, nm_lldp_listener, G_TYPE_OBJECT)

98 99 100
#define NM_LLDP_LISTENER_GET_PRIVATE(self) _NM_GET_PRIVATE (self, NMLldpListener, NM_IS_LLDP_LISTENER)

/*****************************************************************************/
101 102 103 104 105 106 107

typedef struct {
	guint8 chassis_id_type;
	guint8 port_id_type;
	char *chassis_id;
	char *port_id;

108
	struct ether_addr destination_address;
109

110 111
	bool valid:1;

112
	LldpAttrData attrs[_LLDP_PROP_ID_COUNT];
113 114

	GVariant *variant;
115
} LldpNeighbor;
116

117 118 119 120 121 122 123 124 125 126 127 128
/*****************************************************************************/

#define _NMLOG_PREFIX_NAME                "lldp"
#define _NMLOG_DOMAIN                     LOGD_DEVICE
#define _NMLOG(level, ...) \
    G_STMT_START { \
        const NMLogLevel _level = (level); \
        \
        if (nm_logging_enabled (_level, _NMLOG_DOMAIN)) { \
            char _sbuf[64]; \
            int _ifindex = (self) ? NM_LLDP_LISTENER_GET_PRIVATE (self)->ifindex : 0; \
            \
129
            _nm_log (_level, _NMLOG_DOMAIN, 0, \
130
                     _ifindex > 0 ? nm_platform_link_get_name (NM_PLATFORM_GET, _ifindex) : NULL, \
131
                     NULL, \
132 133 134 135 136 137 138 139 140 141 142
                     "%s%s: " _NM_UTILS_MACRO_FIRST (__VA_ARGS__), \
                     _NMLOG_PREFIX_NAME, \
                     ((_ifindex > 0) \
                        ? nm_sprintf_buf (_sbuf, "[%p,%d]", (self), _ifindex) \
                        : ((self) \
                            ? nm_sprintf_buf (_sbuf, "[%p]", (self)) \
                            : "")) \
                     _NM_UTILS_MACRO_REST (__VA_ARGS__)); \
        } \
    } G_STMT_END \

Thomas Haller's avatar
Thomas Haller committed
143 144 145
#define LOG_NEIGH_FMT        "CHASSIS=%s%s%s PORT=%s%s%s"
#define LOG_NEIGH_ARG(neigh) NM_PRINT_FMT_QUOTE_STRING ((neigh)->chassis_id), NM_PRINT_FMT_QUOTE_STRING ((neigh)->port_id)

146 147
/*****************************************************************************/

148 149 150 151 152 153 154 155 156 157
static gboolean
ether_addr_equal (const struct ether_addr *a1, const struct ether_addr *a2)
{
	nm_assert (a1);
	nm_assert (a2);

	G_STATIC_ASSERT_EXPR (sizeof (*a1) == ETH_ALEN);
	return memcmp (a1, a2, ETH_ALEN) == 0;
}

158 159 160 161 162 163 164 165
static guint32
_access_uint8 (const void *data)
{
	return *((const guint8 *) data);
}

static guint32
_access_uint16 (const void *data)
166
{
167
	guint16 v;
168

169 170
	memcpy (&v, data, sizeof (v));
	return ntohs (v);
171 172
}

173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204
/*****************************************************************************/

NM_UTILS_LOOKUP_STR_DEFINE_STATIC (_lldp_attr_id_to_name, LldpAttrId,
	NM_UTILS_LOOKUP_DEFAULT_WARN (NULL),
	NM_UTILS_LOOKUP_STR_ITEM (LLDP_ATTR_ID_PORT_DESCRIPTION,        NM_LLDP_ATTR_PORT_DESCRIPTION),
	NM_UTILS_LOOKUP_STR_ITEM (LLDP_ATTR_ID_SYSTEM_NAME,             NM_LLDP_ATTR_SYSTEM_NAME),
	NM_UTILS_LOOKUP_STR_ITEM (LLDP_ATTR_ID_SYSTEM_DESCRIPTION,      NM_LLDP_ATTR_SYSTEM_DESCRIPTION),
	NM_UTILS_LOOKUP_STR_ITEM (LLDP_ATTR_ID_SYSTEM_CAPABILITIES,     NM_LLDP_ATTR_SYSTEM_CAPABILITIES),
	NM_UTILS_LOOKUP_STR_ITEM (LLDP_ATTR_ID_IEEE_802_1_PVID,         NM_LLDP_ATTR_IEEE_802_1_PVID),
	NM_UTILS_LOOKUP_STR_ITEM (LLDP_ATTR_ID_IEEE_802_1_PPVID,        NM_LLDP_ATTR_IEEE_802_1_PPVID),
	NM_UTILS_LOOKUP_STR_ITEM (LLDP_ATTR_ID_IEEE_802_1_PPVID_FLAGS,  NM_LLDP_ATTR_IEEE_802_1_PPVID_FLAGS),
	NM_UTILS_LOOKUP_STR_ITEM (LLDP_ATTR_ID_IEEE_802_1_VID,          NM_LLDP_ATTR_IEEE_802_1_VID),
	NM_UTILS_LOOKUP_STR_ITEM (LLDP_ATTR_ID_IEEE_802_1_VLAN_NAME,    NM_LLDP_ATTR_IEEE_802_1_VLAN_NAME),
	NM_UTILS_LOOKUP_ITEM_IGNORE (_LLDP_PROP_ID_COUNT),
);

_NM_UTILS_LOOKUP_DEFINE (static, _lldp_attr_id_to_type, LldpAttrId, LldpAttrType,
	NM_UTILS_LOOKUP_DEFAULT_WARN (LLDP_ATTR_TYPE_NONE),
	NM_UTILS_LOOKUP_ITEM (LLDP_ATTR_ID_PORT_DESCRIPTION,            LLDP_ATTR_TYPE_STRING),
	NM_UTILS_LOOKUP_ITEM (LLDP_ATTR_ID_SYSTEM_NAME,                 LLDP_ATTR_TYPE_STRING),
	NM_UTILS_LOOKUP_ITEM (LLDP_ATTR_ID_SYSTEM_DESCRIPTION,          LLDP_ATTR_TYPE_STRING),
	NM_UTILS_LOOKUP_ITEM (LLDP_ATTR_ID_SYSTEM_CAPABILITIES,         LLDP_ATTR_TYPE_UINT32),
	NM_UTILS_LOOKUP_ITEM (LLDP_ATTR_ID_IEEE_802_1_PVID,             LLDP_ATTR_TYPE_UINT32),
	NM_UTILS_LOOKUP_ITEM (LLDP_ATTR_ID_IEEE_802_1_PPVID,            LLDP_ATTR_TYPE_UINT32),
	NM_UTILS_LOOKUP_ITEM (LLDP_ATTR_ID_IEEE_802_1_PPVID_FLAGS,      LLDP_ATTR_TYPE_UINT32),
	NM_UTILS_LOOKUP_ITEM (LLDP_ATTR_ID_IEEE_802_1_VID,              LLDP_ATTR_TYPE_UINT32),
	NM_UTILS_LOOKUP_ITEM (LLDP_ATTR_ID_IEEE_802_1_VLAN_NAME,        LLDP_ATTR_TYPE_STRING),
	NM_UTILS_LOOKUP_ITEM_IGNORE (_LLDP_PROP_ID_COUNT),
);

static void
_lldp_attr_set_str (LldpAttrData *pdata, LldpAttrId attr_id, const char *v_string)
205
{
206 207 208 209
	nm_assert (pdata);
	nm_assert (_lldp_attr_id_to_type (attr_id) == LLDP_ATTR_TYPE_STRING);

	pdata = &pdata[attr_id];
210

211 212 213 214 215
	/* we ignore duplicate fields silently. */
	if (pdata->attr_type != LLDP_ATTR_TYPE_NONE)
		return;
	pdata->attr_type = LLDP_ATTR_TYPE_STRING;
	pdata->v_string = g_strdup (v_string ?: "");
216 217
}

218 219
static void
_lldp_attr_set_str_ptr (LldpAttrData *pdata, LldpAttrId attr_id, const void *str, gsize len)
220 221 222 223 224
{
	const char *s = str;
	const char *tmp;
	gsize len0 = len;
	gs_free char *str_free = NULL;
225 226 227 228 229 230 231 232 233 234 235

	nm_assert (pdata);
	nm_assert (_lldp_attr_id_to_type (attr_id) == LLDP_ATTR_TYPE_STRING);

	pdata = &pdata[attr_id];

	/* we ignore duplicate fields silently. */
	if (pdata->attr_type != LLDP_ATTR_TYPE_NONE)
		return;

	pdata->attr_type = LLDP_ATTR_TYPE_STRING;
236 237 238 239 240 241

	/* truncate at first NUL, including removing trailing NULs*/
	tmp = memchr (s, '\0', len);
	if (tmp)
		len = tmp - s;

242 243 244 245
	if (!len) {
		pdata->v_string = g_strdup ("");
		return;
	}
246 247 248 249 250 251

	if (len0 <= len || s[len] != '\0') {
		/* hmpf, g_strescape needs a trailing NUL. Need to clone */
		s = str_free = g_strndup (s, len);
	}

252
	pdata->v_string = g_strescape (s, NULL);
253 254
}

255 256
static void
_lldp_attr_set_uint32 (LldpAttrData *pdata, LldpAttrId attr_id, guint32 v_uint32)
257
{
258 259
	nm_assert (pdata);
	nm_assert (_lldp_attr_id_to_type (attr_id) == LLDP_ATTR_TYPE_UINT32);
260

261
	pdata = &pdata[attr_id];
262

263 264 265 266 267
	/* we ignore duplicate fields silently. */
	if (pdata->attr_type != LLDP_ATTR_TYPE_NONE)
		return;
	pdata->attr_type = LLDP_ATTR_TYPE_UINT32;
	pdata->v_uint32 = v_uint32;
268 269
}

270 271
/*****************************************************************************/

272 273 274
static guint
lldp_neighbor_id_hash (gconstpointer ptr)
{
275
	const LldpNeighbor *neigh = ptr;
276 277 278
	NMHashState h;

	nm_hash_init (&h, 23423423u);
279 280
	nm_hash_update_str0 (&h, neigh->chassis_id);
	nm_hash_update_str0 (&h, neigh->port_id);
281 282 283
	nm_hash_update_vals (&h,
	                     neigh->chassis_id_type,
	                     neigh->port_id_type);
284
	return nm_hash_complete (&h);
285 286
}

287
static int
288
lldp_neighbor_id_cmp (const LldpNeighbor *x, const LldpNeighbor *y)
289
{
290 291 292 293 294 295 296 297 298 299 300 301 302
	NM_CMP_SELF (x, y);
	NM_CMP_FIELD (x, y, chassis_id_type);
	NM_CMP_FIELD (x, y, port_id_type);
	NM_CMP_FIELD_STR0 (x, y, chassis_id);
	NM_CMP_FIELD_STR0 (x, y, port_id);
	return 0;
}

static int
lldp_neighbor_id_cmp_p (gconstpointer a, gconstpointer b, gpointer user_data)
{
	return lldp_neighbor_id_cmp (*((const LldpNeighbor *const*) a),
	                             *((const LldpNeighbor *const*) b));
303
}
304

305 306 307 308
static gboolean
lldp_neighbor_id_equal (gconstpointer a, gconstpointer b)
{
	return lldp_neighbor_id_cmp (a, b) == 0;
309 310 311
}

static void
312
lldp_neighbor_free (LldpNeighbor *neighbor)
313
{
314 315
	LldpAttrId attr_id;

316 317 318
	if (neighbor) {
		g_free (neighbor->chassis_id);
		g_free (neighbor->port_id);
319 320 321 322
		for (attr_id = 0; attr_id < _LLDP_PROP_ID_COUNT; attr_id++) {
			if (neighbor->attrs[attr_id].attr_type == LLDP_ATTR_TYPE_STRING)
				g_free (neighbor->attrs[attr_id].v_string);
		}
323
		g_clear_pointer (&neighbor->variant, g_variant_unref);
324
		g_slice_free (LldpNeighbor, neighbor);
325 326 327
	}
}

328
static void
329
lldp_neighbor_freep (LldpNeighbor **ptr)
330 331 332 333
{
	lldp_neighbor_free (*ptr);
}

334
static gboolean
335
lldp_neighbor_equal (LldpNeighbor *a, LldpNeighbor *b)
336
{
337
	LldpAttrId attr_id;
338

339 340
	nm_assert (a);
	nm_assert (b);
341 342 343

	if (   a->chassis_id_type != b->chassis_id_type
	    || a->port_id_type != b->port_id_type
344
	    || ether_addr_equal (&a->destination_address, &b->destination_address)
345 346
	    || !nm_streq0 (a->chassis_id, b->chassis_id)
	    || !nm_streq0 (a->port_id, b->port_id))
347 348
		return FALSE;

349 350
	for (attr_id = 0; attr_id < _LLDP_PROP_ID_COUNT; attr_id++) {
		if (a->attrs[attr_id].attr_type != b->attrs[attr_id].attr_type)
351
			return FALSE;
352 353 354
		switch (a->attrs[attr_id].attr_type) {
		case LLDP_ATTR_TYPE_UINT32:
			if (a->attrs[attr_id].v_uint32 != b->attrs[attr_id].v_uint32)
355
				return FALSE;
356 357 358
			break;
		case LLDP_ATTR_TYPE_STRING:
			if (!nm_streq (a->attrs[attr_id].v_string, b->attrs[attr_id].v_string))
359
				return FALSE;
360 361 362 363 364
			break;
		default:
			nm_assert (a->attrs[attr_id].attr_type == LLDP_ATTR_TYPE_NONE);
			break;
		}
365 366 367 368 369
	}

	return TRUE;
}

370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385
static LldpNeighbor *
lldp_neighbor_new (sd_lldp_neighbor *neighbor_sd, GError **error)
{
	nm_auto (lldp_neighbor_freep) LldpNeighbor *neigh = NULL;
	uint8_t chassis_id_type, port_id_type;
	uint16_t data16;
	uint8_t *data8;
	const void *chassis_id, *port_id;
	gsize chassis_id_len, port_id_len, len;
	const char *str;
	int r;

	r = sd_lldp_neighbor_get_chassis_id (neighbor_sd, &chassis_id_type,
	                                     &chassis_id, &chassis_id_len);
	if (r < 0) {
		g_set_error (error, NM_UTILS_ERROR, NM_UTILS_ERROR_UNKNOWN,
386
		             "failed reading chassis-id: %s", nm_strerror_native (-r));
387 388 389 390 391 392 393 394 395 396 397 398
		return NULL;
	}
	if (chassis_id_len < 1) {
		g_set_error (error, NM_UTILS_ERROR, NM_UTILS_ERROR_UNKNOWN,
		             "empty chassis-id");
		return NULL;
	}

	r = sd_lldp_neighbor_get_port_id (neighbor_sd, &port_id_type,
	                                  &port_id, &port_id_len);
	if (r < 0) {
		g_set_error (error, NM_UTILS_ERROR, NM_UTILS_ERROR_UNKNOWN,
399
		             "failed reading port-id: %s", nm_strerror_native (-r));
400 401 402 403 404 405 406 407 408 409 410 411 412 413 414
		return NULL;
	}
	if (port_id_len < 1) {
		g_set_error (error, NM_UTILS_ERROR, NM_UTILS_ERROR_UNKNOWN,
		             "empty port-id");
		return NULL;
	}

	neigh = g_slice_new0 (LldpNeighbor);
	neigh->chassis_id_type = chassis_id_type;
	neigh->port_id_type = port_id_type;

	r = sd_lldp_neighbor_get_destination_address (neighbor_sd, &neigh->destination_address);
	if (r < 0) {
		g_set_error (error, NM_UTILS_ERROR, NM_UTILS_ERROR_UNKNOWN,
415
		             "failed getting destination address: %s", nm_strerror_native (-r));
416
		goto out;
417 418 419
	}

	switch (chassis_id_type) {
420 421 422 423
	case SD_LLDP_CHASSIS_SUBTYPE_INTERFACE_ALIAS:
	case SD_LLDP_CHASSIS_SUBTYPE_INTERFACE_NAME:
	case SD_LLDP_CHASSIS_SUBTYPE_LOCALLY_ASSIGNED:
	case SD_LLDP_CHASSIS_SUBTYPE_CHASSIS_COMPONENT:
424 425
		neigh->chassis_id = g_strndup ((const char *) chassis_id, chassis_id_len);
		break;
426
	case SD_LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS:
427 428 429 430 431
		neigh->chassis_id = nm_utils_hwaddr_ntoa (chassis_id, chassis_id_len);
		break;
	default:
		g_set_error (error, NM_UTILS_ERROR, NM_UTILS_ERROR_UNKNOWN,
		             "unsupported chassis-id type %d", chassis_id_type);
432
		goto out;
433 434 435
	}

	switch (port_id_type) {
436 437 438 439
	case SD_LLDP_PORT_SUBTYPE_INTERFACE_ALIAS:
	case SD_LLDP_PORT_SUBTYPE_INTERFACE_NAME:
	case SD_LLDP_PORT_SUBTYPE_LOCALLY_ASSIGNED:
	case SD_LLDP_PORT_SUBTYPE_PORT_COMPONENT:
440 441
		neigh->port_id = strndup ((char *) port_id, port_id_len);
		break;
442
	case SD_LLDP_PORT_SUBTYPE_MAC_ADDRESS:
443 444 445 446 447
		neigh->port_id = nm_utils_hwaddr_ntoa (port_id, port_id_len);
		break;
	default:
		g_set_error (error, NM_UTILS_ERROR, NM_UTILS_ERROR_UNKNOWN,
		             "unsupported port-id type %d", port_id_type);
448
		goto out;
449 450
	}

451 452
	if (sd_lldp_neighbor_get_port_description (neighbor_sd, &str) == 0)
		_lldp_attr_set_str (neigh->attrs, LLDP_ATTR_ID_PORT_DESCRIPTION, str);
453

454 455
	if (sd_lldp_neighbor_get_system_name (neighbor_sd, &str) == 0)
		_lldp_attr_set_str (neigh->attrs, LLDP_ATTR_ID_SYSTEM_NAME, str);
456

457 458
	if (sd_lldp_neighbor_get_system_description (neighbor_sd, &str) == 0)
		_lldp_attr_set_str (neigh->attrs, LLDP_ATTR_ID_SYSTEM_DESCRIPTION, str);
459

460 461
	if (sd_lldp_neighbor_get_system_capabilities (neighbor_sd, &data16) == 0)
		_lldp_attr_set_uint32 (neigh->attrs, LLDP_ATTR_ID_SYSTEM_CAPABILITIES, data16);
462 463 464 465

	r = sd_lldp_neighbor_tlv_rewind (neighbor_sd);
	if (r < 0) {
		g_set_error (error, NM_UTILS_ERROR, NM_UTILS_ERROR_UNKNOWN,
466
		             "failed reading tlv (rewind): %s", nm_strerror_native (-r));
467
		goto out;
468 469 470 471 472 473 474 475 476 477
	}
	do {
		guint8 oui[3];
		guint8 subtype;

		r = sd_lldp_neighbor_tlv_get_oui (neighbor_sd, oui, &subtype);
		if (r < 0) {
			if (r == -ENXIO)
				continue;
			g_set_error (error, NM_UTILS_ERROR, NM_UTILS_ERROR_UNKNOWN,
478
			             "failed reading tlv: %s", nm_strerror_native (-r));
479
			goto out;
480 481
		}

482
		if (!(   memcmp (oui, SD_LLDP_OUI_802_1, sizeof (oui)) == 0
483
		      && NM_IN_SET (subtype,
484 485 486
		                    SD_LLDP_OUI_802_1_SUBTYPE_PORT_PROTOCOL_VLAN_ID,
		                    SD_LLDP_OUI_802_1_SUBTYPE_PORT_VLAN_ID,
		                    SD_LLDP_OUI_802_1_SUBTYPE_VLAN_NAME)))
487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509
			continue;

		if (sd_lldp_neighbor_tlv_get_raw (neighbor_sd, (void *) &data8, &len) < 0)
			continue;

		/* skip over leading TLV, OUI and subtype */
#ifdef WITH_MORE_ASSERTS
		{
			guint8 check_hdr[] = {
				0xfe | (((len - 2) >> 8) & 0x01), ((len - 2) & 0xFF),
				oui[0], oui[1], oui[2],
				subtype
			};

			nm_assert (len > 2 + 3 +1);
			nm_assert (memcmp (data8, check_hdr, sizeof check_hdr) == 0);
		}
#endif
		if (len <= 6)
			continue;
		data8 += 6;
		len -= 6;

510
		/*if (memcmp (oui, SD_LLDP_OUI_802_1, sizeof (oui)) == 0)*/
511 512
		{
			switch (subtype) {
513
			case SD_LLDP_OUI_802_1_SUBTYPE_PORT_VLAN_ID:
514 515
				if (len != 2)
					continue;
516 517
				_lldp_attr_set_uint32 (neigh->attrs, LLDP_ATTR_ID_IEEE_802_1_PVID,
				                       _access_uint16 (data8));
518
				break;
519
			case SD_LLDP_OUI_802_1_SUBTYPE_PORT_PROTOCOL_VLAN_ID:
520 521
				if (len != 3)
					continue;
522 523 524 525
				_lldp_attr_set_uint32 (neigh->attrs, LLDP_ATTR_ID_IEEE_802_1_PPVID_FLAGS,
				                       _access_uint8 (&data8[0]));
				_lldp_attr_set_uint32 (neigh->attrs, LLDP_ATTR_ID_IEEE_802_1_PPVID,
				                       _access_uint16 (&data8[1]));
526
				break;
527
			case SD_LLDP_OUI_802_1_SUBTYPE_VLAN_NAME: {
528 529 530 531 532 533 534 535
				int l;

				if (len <= 3)
					continue;

				l = data8[2];
				if (len != 3 + l)
					continue;
536 537
				if (l > 32)
					continue;
538

539 540 541
				_lldp_attr_set_uint32 (neigh->attrs, LLDP_ATTR_ID_IEEE_802_1_VID,
				                       _access_uint16 (&data8[0]));
				_lldp_attr_set_str_ptr (neigh->attrs, LLDP_ATTR_ID_IEEE_802_1_VLAN_NAME,
542
				                        &data8[3], l);
543 544 545 546 547 548 549 550
				break;
			}
			default:
				g_assert_not_reached ();
			}
		}
	} while (sd_lldp_neighbor_tlv_next (neighbor_sd) > 0);

551 552 553
	neigh->valid = TRUE;

out:
554
	return g_steal_pointer (&neigh);
555 556
}

557 558 559 560 561
static GVariant *
lldp_neighbor_to_variant (LldpNeighbor *neigh)
{
	GVariantBuilder builder;
	const char *dest_str;
562
	LldpAttrId attr_id;
563

564 565 566
	if (neigh->variant)
		return neigh->variant;

567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595
	g_variant_builder_init (&builder, G_VARIANT_TYPE ("a{sv}"));

	g_variant_builder_add (&builder, "{sv}",
	                       NM_LLDP_ATTR_CHASSIS_ID_TYPE,
	                       g_variant_new_uint32 (neigh->chassis_id_type));
	g_variant_builder_add (&builder, "{sv}",
	                       NM_LLDP_ATTR_CHASSIS_ID,
	                       g_variant_new_string (neigh->chassis_id));
	g_variant_builder_add (&builder, "{sv}",
	                       NM_LLDP_ATTR_PORT_ID_TYPE,
	                       g_variant_new_uint32 (neigh->port_id_type));
	g_variant_builder_add (&builder, "{sv}",
	                       NM_LLDP_ATTR_PORT_ID,
	                       g_variant_new_string (neigh->port_id));

	if (ether_addr_equal (&neigh->destination_address, LLDP_MAC_NEAREST_BRIDGE))
		dest_str = NM_LLDP_DEST_NEAREST_BRIDGE;
	else if (ether_addr_equal (&neigh->destination_address, LLDP_MAC_NEAREST_NON_TPMR_BRIDGE))
		dest_str = NM_LLDP_DEST_NEAREST_NON_TPMR_BRIDGE;
	else if (ether_addr_equal (&neigh->destination_address, LLDP_MAC_NEAREST_CUSTOMER_BRIDGE))
		dest_str = NM_LLDP_DEST_NEAREST_CUSTOMER_BRIDGE;
	else
		dest_str = NULL;
	if (dest_str) {
		g_variant_builder_add (&builder, "{sv}",
		                       NM_LLDP_ATTR_DESTINATION,
		                       g_variant_new_string (dest_str));
	}

596 597
	for (attr_id = 0; attr_id < _LLDP_PROP_ID_COUNT; attr_id++) {
		const LldpAttrData *data = &neigh->attrs[attr_id];
598

599 600 601
		nm_assert (NM_IN_SET (data->attr_type, _lldp_attr_id_to_type (attr_id), LLDP_ATTR_TYPE_NONE));
		switch (data->attr_type) {
		case LLDP_ATTR_TYPE_UINT32:
602
			g_variant_builder_add (&builder, "{sv}",
603 604 605 606
			                       _lldp_attr_id_to_name (attr_id),
			                       g_variant_new_uint32 (data->v_uint32));
			break;
		case LLDP_ATTR_TYPE_STRING:
607
			g_variant_builder_add (&builder, "{sv}",
608 609 610 611 612
			                       _lldp_attr_id_to_name (attr_id),
			                       g_variant_new_string (data->v_string));
			break;
		default:
			break;
613 614 615
		}
	}

616
	return (neigh->variant = g_variant_ref_sink (g_variant_builder_end (&builder)));
617 618
}

619 620
/*****************************************************************************/

621 622 623 624 625 626 627
static void
data_changed_notify (NMLldpListener *self, NMLldpListenerPrivate *priv)
{
	nm_clear_g_variant (&priv->variant);
	_notify (self, PROP_NEIGHBORS);
}

628
static gboolean
629
data_changed_timeout (gpointer user_data)
630
{
631 632 633 634 635 636
	NMLldpListener *self = user_data;
	NMLldpListenerPrivate *priv;

	g_return_val_if_fail (NM_IS_LLDP_LISTENER (self), G_SOURCE_REMOVE);

	priv = NM_LLDP_LISTENER_GET_PRIVATE (self);
637

638 639 640 641 642
	priv->ratelimit_id = 0;
	priv->ratelimit_next = nm_utils_get_monotonic_timestamp_ns() + MIN_UPDATE_INTERVAL_NS;
	data_changed_notify (self, priv);
	return G_SOURCE_REMOVE;
}
643

644 645 646 647 648 649 650 651 652 653 654 655 656 657
static void
data_changed_schedule (NMLldpListener *self)
{
	NMLldpListenerPrivate *priv = NM_LLDP_LISTENER_GET_PRIVATE (self);
	gint64 now;

	now = nm_utils_get_monotonic_timestamp_ns ();
	if (now >= priv->ratelimit_next) {
		nm_clear_g_source (&priv->ratelimit_id);
		priv->ratelimit_next = now + MIN_UPDATE_INTERVAL_NS;
		data_changed_notify (self, priv);
	} else if (!priv->ratelimit_id)
		priv->ratelimit_id = g_timeout_add (NM_UTILS_NS_TO_MSEC_CEIL (priv->ratelimit_next - now), data_changed_timeout, self);
}
658

659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704
static void
process_lldp_neighbor (NMLldpListener *self, sd_lldp_neighbor *neighbor_sd, gboolean neighbor_valid)
{
	NMLldpListenerPrivate *priv;
	nm_auto (lldp_neighbor_freep) LldpNeighbor *neigh = NULL;
	LldpNeighbor *neigh_old;
	gs_free_error GError *parse_error = NULL;
	GError **p_parse_error;
	gboolean changed = FALSE;

	g_return_if_fail (NM_IS_LLDP_LISTENER (self));

	priv = NM_LLDP_LISTENER_GET_PRIVATE (self);

	g_return_if_fail (priv->lldp_handle);
	g_return_if_fail (neighbor_sd);

	p_parse_error = _LOGT_ENABLED () ? &parse_error : NULL;

	neigh = lldp_neighbor_new (neighbor_sd, p_parse_error);
	if (!neigh) {
		_LOGT ("process: failed to parse neighbor: %s", parse_error->message);
		return;
	}

	if (!neigh->valid)
		neighbor_valid = FALSE;

	neigh_old = g_hash_table_lookup (priv->lldp_neighbors, neigh);
	if (neigh_old) {
		if (!neighbor_valid) {
			_LOGT ("process: %s neigh: "LOG_NEIGH_FMT"%s%s%s",
			       "remove", LOG_NEIGH_ARG (neigh),
			       NM_PRINT_FMT_QUOTED (parse_error, " (failed to parse: ", parse_error->message, ")", ""));

			g_hash_table_remove (priv->lldp_neighbors, neigh_old);
			changed = TRUE;
			goto done;
		} else if (lldp_neighbor_equal (neigh_old, neigh))
			return;
	} else if (!neighbor_valid) {
		if (parse_error)
			_LOGT ("process: failed to parse neighbor: %s", parse_error->message);
		return;
	}

705
	/* ensure that we have at most MAX_NEIGHBORS entries */
706 707 708 709 710 711 712 713 714 715 716
	if (   !neigh_old /* only matters in the "add" case. */
	    && (g_hash_table_size (priv->lldp_neighbors) + 1 > MAX_NEIGHBORS)) {
		_LOGT ("process: ignore neighbor due to overall limit of %d", MAX_NEIGHBORS);
		return;
	}

	_LOGD ("process: %s neigh: "LOG_NEIGH_FMT,
	        neigh_old ? "update" : "new",
	        LOG_NEIGH_ARG (neigh));

	changed = TRUE;
717
	g_hash_table_add (priv->lldp_neighbors, g_steal_pointer (&neigh));
718 719 720 721

done:
	if (changed)
		data_changed_schedule (self);
722 723 724
}

static void
725
lldp_event_handler (sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata)
726
{
727
	process_lldp_neighbor (userdata, n, event != SD_LLDP_EVENT_REMOVED);
728 729 730
}

gboolean
731
nm_lldp_listener_start (NMLldpListener *self, int ifindex, GError **error)
732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747
{
	NMLldpListenerPrivate *priv;
	int ret;

	g_return_val_if_fail (NM_IS_LLDP_LISTENER (self), FALSE);
	g_return_val_if_fail (ifindex > 0, FALSE);
	g_return_val_if_fail (!error || !*error, FALSE);

	priv = NM_LLDP_LISTENER_GET_PRIVATE (self);

	if (priv->lldp_handle) {
		g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
		                     "already running");
		return FALSE;
	}

748
	ret = sd_lldp_new (&priv->lldp_handle);
749
	if (ret < 0) {
750 751 752 753 754
		g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
		                     "initialization failed");
		return FALSE;
	}

755 756 757 758 759 760 761
	ret = sd_lldp_set_ifindex (priv->lldp_handle, ifindex);
	if (ret < 0) {
		g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
		                     "failed setting ifindex");
		goto err;
	}

762
	ret = sd_lldp_set_callback (priv->lldp_handle, lldp_event_handler, self);
763
	if (ret < 0) {
764
		g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
765 766
		                     "set callback failed");
		goto err;
767 768
	}

769 770 771
	priv->ifindex = ifindex;

	ret = sd_lldp_attach_event (priv->lldp_handle, NULL, 0);
772
	if (ret < 0) {
773
		g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
774 775
		                     "attach event failed");
		goto err_free;
776 777 778
	}

	ret = sd_lldp_start (priv->lldp_handle);
779
	if (ret < 0) {
780 781 782 783 784
		g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
		                     "start failed");
		goto err;
	}

785
	_LOGD ("start");
786

787 788 789 790 791
	return TRUE;

err:
	sd_lldp_detach_event (priv->lldp_handle);
err_free:
792
	sd_lldp_unref (priv->lldp_handle);
793
	priv->lldp_handle = NULL;
794
	priv->ifindex = 0;
795 796 797 798 799 800 801 802
	return FALSE;
}

void
nm_lldp_listener_stop (NMLldpListener *self)
{
	NMLldpListenerPrivate *priv;
	guint size;
803
	gboolean changed = FALSE;
804 805 806 807 808

	g_return_if_fail (NM_IS_LLDP_LISTENER (self));
	priv = NM_LLDP_LISTENER_GET_PRIVATE (self);

	if (priv->lldp_handle) {
809
		_LOGD ("stop");
810 811
		sd_lldp_stop (priv->lldp_handle);
		sd_lldp_detach_event (priv->lldp_handle);
812
		sd_lldp_unref (priv->lldp_handle);
813 814 815 816
		priv->lldp_handle = NULL;

		size = g_hash_table_size (priv->lldp_neighbors);
		g_hash_table_remove_all (priv->lldp_neighbors);
817 818
		if (size || priv->ratelimit_id)
			changed = TRUE;
819 820
	}

821 822
	nm_clear_g_source (&priv->ratelimit_id);
	priv->ratelimit_next = 0;
823
	priv->ifindex = 0;
824 825 826

	if (changed)
		data_changed_notify (self, priv);
827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844
}

gboolean
nm_lldp_listener_is_running (NMLldpListener *self)
{
	NMLldpListenerPrivate *priv;

	g_return_val_if_fail (NM_IS_LLDP_LISTENER (self), FALSE);

	priv = NM_LLDP_LISTENER_GET_PRIVATE (self);
	return !!priv->lldp_handle;
}

GVariant *
nm_lldp_listener_get_neighbors (NMLldpListener *self)
{
	NMLldpListenerPrivate *priv;

845 846
	g_return_val_if_fail (NM_IS_LLDP_LISTENER (self), FALSE);

847 848
	priv = NM_LLDP_LISTENER_GET_PRIVATE (self);

849 850 851 852 853
	if (G_UNLIKELY (!priv->variant)) {
		GVariantBuilder array_builder;
		gs_free LldpNeighbor **neighbors = NULL;
		guint i, n;

854
		g_variant_builder_init (&array_builder, G_VARIANT_TYPE ("aa{sv}"));
855 856 857 858 859 860
		neighbors = (LldpNeighbor **) nm_utils_hash_keys_to_array (priv->lldp_neighbors,
		                                                           lldp_neighbor_id_cmp_p,
		                                                           NULL,
		                                                           &n);
		for (i = 0; i < n; i++)
			g_variant_builder_add_value (&array_builder, lldp_neighbor_to_variant (neighbors[i]));
861 862
		priv->variant = g_variant_ref_sink (g_variant_builder_end (&array_builder));
	}
863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888
	return priv->variant;
}

static void
get_property (GObject *object, guint prop_id,
              GValue *value, GParamSpec *pspec)
{
	NMLldpListener *self = NM_LLDP_LISTENER (object);

	switch (prop_id) {
	case PROP_NEIGHBORS:
		g_value_set_variant (value, nm_lldp_listener_get_neighbors (self));
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
		break;
	}
}

static void
nm_lldp_listener_init (NMLldpListener *self)
{
	NMLldpListenerPrivate *priv = NM_LLDP_LISTENER_GET_PRIVATE (self);

	priv->lldp_neighbors = g_hash_table_new_full (lldp_neighbor_id_hash,
	                                              lldp_neighbor_id_equal,
889
	                                              (GDestroyNotify) lldp_neighbor_free, NULL);
890 891

	_LOGT ("lldp listener created");
892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918
}

NMLldpListener *
nm_lldp_listener_new (void)
{
	return (NMLldpListener *) g_object_new (NM_TYPE_LLDP_LISTENER, NULL);
}

static void
dispose (GObject *object)
{
	nm_lldp_listener_stop (NM_LLDP_LISTENER (object));

	G_OBJECT_CLASS (nm_lldp_listener_parent_class)->dispose (object);
}

static void
finalize (GObject *object)
{
	NMLldpListener *self = NM_LLDP_LISTENER (object);
	NMLldpListenerPrivate *priv = NM_LLDP_LISTENER_GET_PRIVATE (self);

	nm_lldp_listener_stop (self);
	g_hash_table_unref (priv->lldp_neighbors);

	nm_clear_g_variant (&priv->variant);

919 920
	_LOGT ("lldp listener destroyed");

921 922 923 924 925 926 927 928 929 930 931 932
	G_OBJECT_CLASS (nm_lldp_listener_parent_class)->finalize (object);
}

static void
nm_lldp_listener_class_init (NMLldpListenerClass *klass)
{
	GObjectClass *object_class = G_OBJECT_CLASS (klass);

	object_class->dispose = dispose;
	object_class->finalize = finalize;
	object_class->get_property = get_property;

933 934 935 936 937 938 939 940
	obj_properties[PROP_NEIGHBORS] =
	    g_param_spec_variant (NM_LLDP_LISTENER_NEIGHBORS, "", "",
	                          G_VARIANT_TYPE ("aa{sv}"),
	                          NULL,
	                          G_PARAM_READABLE |
	                          G_PARAM_STATIC_STRINGS);

	g_object_class_install_properties (object_class, _PROPERTY_ENUMS_LAST, obj_properties);
941 942
}