nm-lldp-listener.c 35 KB
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/* -*- 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.
 */

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#include "nm-default.h"
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#include "nm-lldp-listener.h"

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#include <net/ethernet.h>

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#include "platform/nm-platform.h"
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#include "nm-utils/unaligned.h"
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#include "nm-utils/nm-c-list.h"
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#include "nm-utils.h"

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#include "systemd/nm-sd.h"
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#define MAX_NEIGHBORS         4096
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#define MIN_UPDATE_INTERVAL_NS (2 * NM_UTILS_NS_PER_SECOND)
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#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 }))

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typedef enum {
	LLDP_ATTR_TYPE_NONE,
	LLDP_ATTR_TYPE_UINT32,
	LLDP_ATTR_TYPE_STRING,
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	LLDP_ATTR_TYPE_VARDICT,
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	LLDP_ATTR_TYPE_ARRAY_OF_VARDICTS,
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} 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,
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	LLDP_ATTR_ID_MANAGEMENT_ADDRESSES,
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	LLDP_ATTR_ID_IEEE_802_1_PVID,
	LLDP_ATTR_ID_IEEE_802_1_PPVID,
	LLDP_ATTR_ID_IEEE_802_1_PPVID_FLAGS,
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	LLDP_ATTR_ID_IEEE_802_1_PPVIDS,
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	LLDP_ATTR_ID_IEEE_802_1_VID,
	LLDP_ATTR_ID_IEEE_802_1_VLAN_NAME,
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	LLDP_ATTR_ID_IEEE_802_1_VLANS,
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	LLDP_ATTR_ID_IEEE_802_3_MAC_PHY_CONF,
	LLDP_ATTR_ID_IEEE_802_3_POWER_VIA_MDI,
	LLDP_ATTR_ID_IEEE_802_3_MAX_FRAME_SIZE,
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	_LLDP_ATTR_ID_COUNT,
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} LldpAttrId;

typedef struct {
	LldpAttrType attr_type;
	union {
		guint32 v_uint32;
		char *v_string;
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		GVariant *v_variant;
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		CList v_variant_list;
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	};
} LldpAttrData;

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/*****************************************************************************/

NM_GOBJECT_PROPERTIES_DEFINE (NMLldpListener,
	PROP_NEIGHBORS,
);

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typedef struct {
	char         *iface;
	int           ifindex;
	sd_lldp      *lldp_handle;
	GHashTable   *lldp_neighbors;
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	/* the timestamp in nsec until which we delay updates. */
	gint64        ratelimit_next;
	guint         ratelimit_id;

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	GVariant     *variant;
} NMLldpListenerPrivate;

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struct _NMLldpListener {
	GObject parent;
	NMLldpListenerPrivate _priv;
};

struct _NMLldpListenerClass {
	GObjectClass parent;
};
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G_DEFINE_TYPE (NMLldpListener, nm_lldp_listener, G_TYPE_OBJECT)

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#define NM_LLDP_LISTENER_GET_PRIVATE(self) _NM_GET_PRIVATE (self, NMLldpListener, NM_IS_LLDP_LISTENER)

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

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	struct ether_addr destination_address;
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	bool valid:1;

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	LldpAttrData attrs[_LLDP_ATTR_ID_COUNT];
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	GVariant *variant;
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} LldpNeighbor;
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/*****************************************************************************/

#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; \
            \
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            _nm_log (_level, _NMLOG_DOMAIN, 0, \
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                     _ifindex > 0 ? nm_platform_link_get_name (NM_PLATFORM_GET, _ifindex) : NULL, \
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                     NULL, \
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                     "%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 \

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#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)

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/*****************************************************************************/

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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;
}

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/*****************************************************************************/

NM_UTILS_LOOKUP_STR_DEFINE_STATIC (_lldp_attr_id_to_name, LldpAttrId,
	NM_UTILS_LOOKUP_DEFAULT_WARN (NULL),
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	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_MANAGEMENT_ADDRESSES,     NM_LLDP_ATTR_MANAGEMENT_ADDRESSES),
	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_PPVIDS,        NM_LLDP_ATTR_IEEE_802_1_PPVIDS),
	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_STR_ITEM (LLDP_ATTR_ID_IEEE_802_1_VLANS,         NM_LLDP_ATTR_IEEE_802_1_VLANS),
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	NM_UTILS_LOOKUP_STR_ITEM (LLDP_ATTR_ID_IEEE_802_3_MAC_PHY_CONF,  NM_LLDP_ATTR_IEEE_802_3_MAC_PHY_CONF),
	NM_UTILS_LOOKUP_STR_ITEM (LLDP_ATTR_ID_IEEE_802_3_POWER_VIA_MDI, NM_LLDP_ATTR_IEEE_802_3_POWER_VIA_MDI),
	NM_UTILS_LOOKUP_STR_ITEM (LLDP_ATTR_ID_IEEE_802_3_MAX_FRAME_SIZE,NM_LLDP_ATTR_IEEE_802_3_MAX_FRAME_SIZE),
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	NM_UTILS_LOOKUP_ITEM_IGNORE (_LLDP_ATTR_ID_COUNT),
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);

_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),
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	NM_UTILS_LOOKUP_ITEM (LLDP_ATTR_ID_MANAGEMENT_ADDRESSES,        LLDP_ATTR_TYPE_ARRAY_OF_VARDICTS),
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	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),
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	NM_UTILS_LOOKUP_ITEM (LLDP_ATTR_ID_IEEE_802_1_PPVIDS,           LLDP_ATTR_TYPE_ARRAY_OF_VARDICTS),
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	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),
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	NM_UTILS_LOOKUP_ITEM (LLDP_ATTR_ID_IEEE_802_1_VLANS,            LLDP_ATTR_TYPE_ARRAY_OF_VARDICTS),
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	NM_UTILS_LOOKUP_ITEM (LLDP_ATTR_ID_IEEE_802_3_MAC_PHY_CONF,     LLDP_ATTR_TYPE_VARDICT),
	NM_UTILS_LOOKUP_ITEM (LLDP_ATTR_ID_IEEE_802_3_POWER_VIA_MDI,    LLDP_ATTR_TYPE_VARDICT),
	NM_UTILS_LOOKUP_ITEM (LLDP_ATTR_ID_IEEE_802_3_MAX_FRAME_SIZE,   LLDP_ATTR_TYPE_UINT32),
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	NM_UTILS_LOOKUP_ITEM_IGNORE (_LLDP_ATTR_ID_COUNT),
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);

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

	pdata = &pdata[attr_id];
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	/* 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 ?: "");
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}

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static void
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_lldp_attr_take_str_ptr (LldpAttrData *pdata, LldpAttrId attr_id, char *str)
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{
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	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;
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	pdata->v_string = str;
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}

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static void
_lldp_attr_set_uint32 (LldpAttrData *pdata, LldpAttrId attr_id, guint32 v_uint32)
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{
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	nm_assert (pdata);
	nm_assert (_lldp_attr_id_to_type (attr_id) == LLDP_ATTR_TYPE_UINT32);
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	pdata = &pdata[attr_id];
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	/* 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;
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}

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static void
_lldp_attr_set_vardict (LldpAttrData *pdata, LldpAttrId attr_id, GVariant *variant)
{

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

	pdata = &pdata[attr_id];

	/* we ignore duplicate fields silently */
	if (pdata->attr_type != LLDP_ATTR_TYPE_NONE) {
		if (g_variant_is_floating (variant))
			g_variant_unref (variant);
		return;
	}

	pdata->attr_type = LLDP_ATTR_TYPE_VARDICT;
	pdata->v_variant = g_variant_ref_sink (variant);
}

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static void
_lldp_attr_add_vardict (LldpAttrData *pdata, LldpAttrId attr_id, GVariant *variant)
{
	nm_assert (pdata);
	nm_assert (_lldp_attr_id_to_type (attr_id) == LLDP_ATTR_TYPE_ARRAY_OF_VARDICTS);

	g_variant_ref_sink (variant);
	pdata = &pdata[attr_id];

	if (pdata->attr_type == LLDP_ATTR_TYPE_NONE) {
		c_list_init (&pdata->v_variant_list);
		pdata->attr_type = LLDP_ATTR_TYPE_ARRAY_OF_VARDICTS;
	} else
		nm_assert (pdata->attr_type == LLDP_ATTR_TYPE_ARRAY_OF_VARDICTS);

	c_list_link_tail (&pdata->v_variant_list, &nm_c_list_elem_new_stale (variant)->lst);
}

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/*****************************************************************************/

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static guint
lldp_neighbor_id_hash (gconstpointer ptr)
{
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	const LldpNeighbor *neigh = ptr;
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	NMHashState h;

	nm_hash_init (&h, 23423423u);
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	nm_hash_update_str0 (&h, neigh->chassis_id);
	nm_hash_update_str0 (&h, neigh->port_id);
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	nm_hash_update_vals (&h,
	                     neigh->chassis_id_type,
	                     neigh->port_id_type);
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	return nm_hash_complete (&h);
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}

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static int
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lldp_neighbor_id_cmp (const LldpNeighbor *x, const LldpNeighbor *y)
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{
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	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));
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}
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static gboolean
lldp_neighbor_id_equal (gconstpointer a, gconstpointer b)
{
	return lldp_neighbor_id_cmp (a, b) == 0;
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}

static void
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lldp_neighbor_free (LldpNeighbor *neighbor)
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{
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	LldpAttrId attr_id;
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	LldpAttrType attr_type;
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	if (neighbor) {
		g_free (neighbor->chassis_id);
		g_free (neighbor->port_id);
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		for (attr_id = 0; attr_id < _LLDP_ATTR_ID_COUNT; attr_id++) {
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			attr_type = neighbor->attrs[attr_id].attr_type;

			switch (attr_type) {
			case LLDP_ATTR_TYPE_STRING:
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				g_free (neighbor->attrs[attr_id].v_string);
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				break;
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			case LLDP_ATTR_TYPE_VARDICT:
				g_variant_unref (neighbor->attrs[attr_id].v_variant);
				break;
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			case LLDP_ATTR_TYPE_ARRAY_OF_VARDICTS:
				nm_c_list_elem_free_all (&neighbor->attrs[attr_id].v_variant_list,
				                         (GDestroyNotify) g_variant_unref);
				break;
			default:
				;
			}
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		}
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		g_clear_pointer (&neighbor->variant, g_variant_unref);
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		g_slice_free (LldpNeighbor, neighbor);
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	}
}

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static void
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lldp_neighbor_freep (LldpNeighbor **ptr)
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{
	lldp_neighbor_free (*ptr);
}

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static gboolean
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lldp_neighbor_equal (LldpNeighbor *a, LldpNeighbor *b)
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{
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	LldpAttrId attr_id;
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	nm_assert (a);
	nm_assert (b);
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	if (   a->chassis_id_type != b->chassis_id_type
	    || a->port_id_type != b->port_id_type
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	    || ether_addr_equal (&a->destination_address, &b->destination_address)
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	    || !nm_streq0 (a->chassis_id, b->chassis_id)
	    || !nm_streq0 (a->port_id, b->port_id))
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		return FALSE;

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	for (attr_id = 0; attr_id < _LLDP_ATTR_ID_COUNT; attr_id++) {
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		if (a->attrs[attr_id].attr_type != b->attrs[attr_id].attr_type)
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			return FALSE;
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		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)
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				return FALSE;
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			break;
		case LLDP_ATTR_TYPE_STRING:
			if (!nm_streq (a->attrs[attr_id].v_string, b->attrs[attr_id].v_string))
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				return FALSE;
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			break;
		default:
			nm_assert (a->attrs[attr_id].attr_type == LLDP_ATTR_TYPE_NONE);
			break;
		}
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	}

	return TRUE;
}

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static GVariant *
parse_management_address_tlv (uint8_t *data, gsize len)
{
	GVariantDict dict;
	GVariant *variant;
	gsize addr_len, oid_len;

	/* 802.1AB-2009 - Figure 8-11
	 *
	 * - TLV type / length        (2 bytes)
	 * - address string length    (1 byte)
	 * - address subtype          (1 byte)
	 * - address                  (1 to 31 bytes)
	 * - interface number subtype (1 byte)
	 * - interface number         (4 bytes)
	 * - OID string length        (1 byte)
	 * - OID                      (0 to 128 bytes)
	 */

	if (len < 11)
		goto err;

	nm_assert ((data[0] >> 1) == SD_LLDP_TYPE_MGMT_ADDRESS);
	nm_assert ((((data[0] & 1) << 8) + data[1]) + 2 == len);

	data += 2;
	len -= 2;
	addr_len = *data; /* length of (address subtype + address) */

	if (addr_len < 2 || addr_len > 32)
		goto err;
	if (len < (  1         /* address stringth length */
	           + addr_len  /* address subtype + address */
	           + 5         /* interface */
	           + 1))       /* oid */
		goto err;

	g_variant_dict_init (&dict, NULL);

	data++;
	len--;
	g_variant_dict_insert (&dict, "address-subtype", "u", (guint32) *data);
	variant = g_variant_new_fixed_array (G_VARIANT_TYPE_BYTE, data + 1, addr_len - 1, 1);
	g_variant_dict_insert_value (&dict, "address", variant);

	data += addr_len;
	len -= addr_len;
	g_variant_dict_insert (&dict, "interface-number-subtype", "u", (guint32) *data);

	data++;
	len--;
	g_variant_dict_insert (&dict, "interface-number", "u", unaligned_read_be32 (data));

	data += 4;
	len -= 4;
	oid_len = *data;

	if (len < (1 + oid_len))
		goto err;

	data++;
	variant = g_variant_new_fixed_array (G_VARIANT_TYPE_BYTE, data, oid_len, 1);
	g_variant_dict_insert_value (&dict, "object-id", variant);
	return g_variant_dict_end (&dict);
err:
	g_variant_dict_clear (&dict);
	return NULL;
}

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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,
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		             "failed reading chassis-id: %s", nm_strerror_native (-r));
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		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,
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		             "failed reading port-id: %s", nm_strerror_native (-r));
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		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,
525
		             "failed getting destination address: %s", nm_strerror_native (-r));
526
		goto out;
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	}

	switch (chassis_id_type) {
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	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:
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		neigh->chassis_id = g_strndup ((const char *) chassis_id, chassis_id_len);
		break;
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	case SD_LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS:
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		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);
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		goto out;
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	}

	switch (port_id_type) {
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	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:
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		neigh->port_id = strndup ((char *) port_id, port_id_len);
		break;
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	case SD_LLDP_PORT_SUBTYPE_MAC_ADDRESS:
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		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);
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		goto out;
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	}

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	if (sd_lldp_neighbor_get_port_description (neighbor_sd, &str) == 0)
		_lldp_attr_set_str (neigh->attrs, LLDP_ATTR_ID_PORT_DESCRIPTION, str);
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	if (sd_lldp_neighbor_get_system_name (neighbor_sd, &str) == 0)
		_lldp_attr_set_str (neigh->attrs, LLDP_ATTR_ID_SYSTEM_NAME, str);
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	if (sd_lldp_neighbor_get_system_description (neighbor_sd, &str) == 0)
		_lldp_attr_set_str (neigh->attrs, LLDP_ATTR_ID_SYSTEM_DESCRIPTION, str);
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	if (sd_lldp_neighbor_get_system_capabilities (neighbor_sd, &data16) == 0)
		_lldp_attr_set_uint32 (neigh->attrs, LLDP_ATTR_ID_SYSTEM_CAPABILITIES, data16);
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	r = sd_lldp_neighbor_tlv_rewind (neighbor_sd);
	if (r < 0) {
		g_set_error (error, NM_UTILS_ERROR, NM_UTILS_ERROR_UNKNOWN,
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		             "failed reading tlv (rewind): %s", nm_strerror_native (-r));
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		goto out;
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	}
	do {
		guint8 oui[3];
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		guint8 type, subtype;
		GVariant *variant;

		if (sd_lldp_neighbor_tlv_get_type (neighbor_sd, &type) < 0)
			continue;

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

		switch (type) {
		case SD_LLDP_TYPE_MGMT_ADDRESS:
			variant = parse_management_address_tlv (data8, len);
			if (variant) {
				_lldp_attr_add_vardict (neigh->attrs,
				                        LLDP_ATTR_ID_MANAGEMENT_ADDRESSES,
				                        variant);
			}
			continue;
		case SD_LLDP_TYPE_PRIVATE:
			break;
		default:
			continue;
		}
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		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,
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			             "failed reading tlv: %s", nm_strerror_native (-r));
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			goto out;
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		}

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		if (   memcmp (oui, SD_LLDP_OUI_802_1, sizeof (oui)) != 0
		    && memcmp (oui, SD_LLDP_OUI_802_3, sizeof (oui)) != 0)
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			continue;

		/* skip over leading TLV, OUI and subtype */
619
#if NM_MORE_ASSERTS > 5
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		{
			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;

636
		if (memcmp (oui, SD_LLDP_OUI_802_1, sizeof (oui)) == 0) {
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			GVariantDict dict;

639
			switch (subtype) {
640
			case SD_LLDP_OUI_802_1_SUBTYPE_PORT_VLAN_ID:
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				if (len != 2)
					continue;
643
				_lldp_attr_set_uint32 (neigh->attrs, LLDP_ATTR_ID_IEEE_802_1_PVID,
644
				                       unaligned_read_be16 (data8));
645
				break;
646
			case SD_LLDP_OUI_802_1_SUBTYPE_PORT_PROTOCOL_VLAN_ID:
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				if (len != 3)
					continue;
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				_lldp_attr_set_uint32 (neigh->attrs, LLDP_ATTR_ID_IEEE_802_1_PPVID_FLAGS,
650
				                       data8[0]);
651
				_lldp_attr_set_uint32 (neigh->attrs, LLDP_ATTR_ID_IEEE_802_1_PPVID,
652
				                       unaligned_read_be16 (&data8[1]));
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				g_variant_dict_init (&dict, NULL);
				g_variant_dict_insert (&dict, "ppvid", "u", (guint32) unaligned_read_be16 (&data8[1]));
				g_variant_dict_insert (&dict, "flags", "u", (guint32) data8[0]);

				_lldp_attr_add_vardict (neigh->attrs,
				                        LLDP_ATTR_ID_IEEE_802_1_PPVIDS,
				                        g_variant_dict_end (&dict));
661
				break;
662
			case SD_LLDP_OUI_802_1_SUBTYPE_VLAN_NAME: {
663
				int l;
664 665 666
				guint32 vid;
				const char *name;
				char *name_to_free;
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				if (len <= 3)
					continue;

				l = data8[2];
				if (len != 3 + l)
					continue;
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				if (l > 32)
					continue;
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				name = nm_utils_buf_utf8safe_escape (&data8[3], l, 0, &name_to_free);
				vid = unaligned_read_be16 (&data8[0]);

				g_variant_dict_init (&dict, NULL);
				g_variant_dict_insert (&dict, "vid", "u", vid);
				g_variant_dict_insert (&dict, "name", "s", name);

				_lldp_attr_add_vardict (neigh->attrs,
				                        LLDP_ATTR_ID_IEEE_802_1_VLANS,
				                        g_variant_dict_end (&dict));

				_lldp_attr_set_uint32 (neigh->attrs, LLDP_ATTR_ID_IEEE_802_1_VID, vid);
				_lldp_attr_take_str_ptr (neigh->attrs,
				                         LLDP_ATTR_ID_IEEE_802_1_VLAN_NAME,
				                         name_to_free ?: g_strdup (name));
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				break;
			}
			default:
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				continue;
			}
		} else if (memcmp (oui, SD_LLDP_OUI_802_3, sizeof (oui)) == 0) {
			GVariantDict dict;

			switch (subtype) {
			case SD_LLDP_OUI_802_3_SUBTYPE_MAC_PHY_CONFIG_STATUS:
				if (len != 5)
					continue;

				g_variant_dict_init (&dict, NULL);
				g_variant_dict_insert (&dict, "autoneg", "u", (guint32) data8[0]);
				g_variant_dict_insert (&dict, "pmd-autoneg-cap", "u", (guint32) unaligned_read_be16 (&data8[1]));
				g_variant_dict_insert (&dict, "operational-mau-type", "u", (guint32) unaligned_read_be16 (&data8[3]));

				_lldp_attr_set_vardict (neigh->attrs,
				                        LLDP_ATTR_ID_IEEE_802_3_MAC_PHY_CONF,
				                        g_variant_dict_end (&dict));
				break;
			case SD_LLDP_OUI_802_3_SUBTYPE_POWER_VIA_MDI:
				if (len != 3)
					continue;

				g_variant_dict_init (&dict, NULL);
				g_variant_dict_insert (&dict, "mdi-power-support", "u", (guint32) data8[0]);
				g_variant_dict_insert (&dict, "pse-power-pair", "u", (guint32) data8[1]);
				g_variant_dict_insert (&dict, "power-class", "u", (guint32) data8[2]);

				_lldp_attr_set_vardict (neigh->attrs,
				                        LLDP_ATTR_ID_IEEE_802_3_POWER_VIA_MDI,
				                        g_variant_dict_end (&dict));
				break;
			case SD_LLDP_OUI_802_3_SUBTYPE_MAXIMUM_FRAME_SIZE:
				if (len != 2)
					continue;
				_lldp_attr_set_uint32 (neigh->attrs, LLDP_ATTR_ID_IEEE_802_3_MAX_FRAME_SIZE,
				                       unaligned_read_be16 (data8));
				break;
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			}
		}
	} while (sd_lldp_neighbor_tlv_next (neighbor_sd) > 0);

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	neigh->valid = TRUE;

out:
740
	return g_steal_pointer (&neigh);
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}

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static GVariant *
lldp_neighbor_to_variant (LldpNeighbor *neigh)
{
	GVariantBuilder builder;
	const char *dest_str;
748
	LldpAttrId attr_id;
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	if (neigh->variant)
		return neigh->variant;

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	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));
	}

Beniamino Galvani's avatar
Beniamino Galvani committed
782
	for (attr_id = 0; attr_id < _LLDP_ATTR_ID_COUNT; attr_id++) {
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		const LldpAttrData *data = &neigh->attrs[attr_id];
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		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:
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			g_variant_builder_add (&builder, "{sv}",
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			                       _lldp_attr_id_to_name (attr_id),
			                       g_variant_new_uint32 (data->v_uint32));
			break;
		case LLDP_ATTR_TYPE_STRING:
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			g_variant_builder_add (&builder, "{sv}",
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			                       _lldp_attr_id_to_name (attr_id),
			                       g_variant_new_string (data->v_string));
			break;
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		case LLDP_ATTR_TYPE_VARDICT:
			g_variant_builder_add (&builder, "{sv}",
			                       _lldp_attr_id_to_name (attr_id),
			                       data->v_variant);
			break;
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		case LLDP_ATTR_TYPE_ARRAY_OF_VARDICTS: {
			NMCListElem *elem;
			GVariantBuilder builder2;

			g_variant_builder_init (&builder2, G_VARIANT_TYPE ("aa{sv}"));

			c_list_for_each_entry (elem, &data->v_variant_list, lst)
				g_variant_builder_add_value (&builder2, elem->data);

			g_variant_builder_add (&builder, "{sv}",
			                       _lldp_attr_id_to_name (attr_id),
			                       g_variant_builder_end (&builder2));
			break;
		}
816
		case LLDP_ATTR_TYPE_NONE:
817
			break;
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		}
	}

821
	return (neigh->variant = g_variant_ref_sink (g_variant_builder_end (&builder)));
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}

824 825
/*****************************************************************************/

826 827 828 829 830 831 832
static void
data_changed_notify (NMLldpListener *self, NMLldpListenerPrivate *priv)
{
	nm_clear_g_variant (&priv->variant);
	_notify (self, PROP_NEIGHBORS);
}

833
static gboolean
834
data_changed_timeout (gpointer user_data)
835
{
836 837 838 839 840 841
	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);
842

843 844 845 846 847
	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;
}
848

849 850 851 852 853 854 855 856 857 858 859 860 861 862
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);
}
863

864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909
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;
	}

910
	/* ensure that we have at most MAX_NEIGHBORS entries */
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	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;
922
	g_hash_table_add (priv->lldp_neighbors, g_steal_pointer (&neigh));
923 924 925 926

done:
	if (changed)
		data_changed_schedule (self);
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}

static void
930
lldp_event_handler (sd_lldp *lldp, sd_lldp_event event, sd_lldp_neighbor *n, void *userdata)
931
{
932
	process_lldp_neighbor (userdata, n, event != SD_LLDP_EVENT_REMOVED);
933 934 935
}

gboolean
936
nm_lldp_listener_start (NMLldpListener *self, int ifindex, GError **error)
937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952
{
	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;
	}

953
	ret = sd_lldp_new (&priv->lldp_handle);
954
	if (ret < 0) {
955 956 957 958 959
		g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
		                     "initialization failed");
		return FALSE;
	}

960 961 962 963 964 965 966
	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;
	}

967
	ret = sd_lldp_set_callback (priv->lldp_handle, lldp_event_handler, self);
968
	if (ret < 0) {
969
		g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
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		                     "set callback failed");
		goto err;
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	}

974 975 976
	priv->ifindex = ifindex;

	ret = sd_lldp_attach_event (priv->lldp_handle, NULL, 0);
977
	if (ret < 0) {
978
		g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
979 980
		                     "attach event failed");
		goto err_free;
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	}

	ret = sd_lldp_start (priv->lldp_handle);
984
	if (ret < 0) {
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		g_set_error_literal (error, NM_DEVICE_ERROR, NM_DEVICE_ERROR_FAILED,
		                     "start failed");
		goto err;
	}

990
	_LOGD ("start");
991

992 993 994 995 996
	return TRUE;

err:
	sd_lldp_detach_event (priv->lldp_handle);
err_free:
997
	sd_lldp_unref (priv->lldp_handle);
998
	priv->lldp_handle = NULL;
999
	priv->ifindex = 0;
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	return FALSE;
}

void
nm_lldp_listener_stop (NMLldpListener *self)
{
	NMLldpListenerPrivate *priv;
	guint size;
1008
	gboolean changed = FALSE;
1009 1010 1011 1012 1013

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

	if (priv->lldp_handle) {
1014
		_LOGD ("stop");
1015 1016
		sd_lldp_stop (priv->lldp_handle);
		sd_lldp_detach_event (priv->lldp_handle);
1017
		sd_lldp_unref (priv->lldp_handle);
1018 1019 1020 1021
		priv->lldp_handle = NULL;

		size = g_hash_table_size (priv->lldp_neighbors);
		g_hash_table_remove_all (priv->lldp_neighbors);
1022 1023
		if (size || priv->ratelimit_id)
			changed = TRUE;
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	}

1026 1027
	nm_clear_g_source (&priv->ratelimit_id);
	priv->ratelimit_next = 0;
1028
	priv->ifindex = 0;
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	if (changed)
		data_changed_notify (self, priv);
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}

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;

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	g_return_val_if_fail (NM_IS_LLDP_LISTENER (self), FALSE);

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	priv = NM_LLDP_LISTENER_GET_PRIVATE (self);

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

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		g_variant_builder_init (&array_builder, G_VARIANT_TYPE ("aa{sv}"));
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		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]));
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		priv->variant = g_variant_ref_sink (g_variant_builder_end (&array_builder));
	}
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	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,
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	                                              (GDestroyNotify) lldp_neighbor_free, NULL);
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	_LOGT ("lldp listener created");
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}

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);

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	_LOGT ("lldp listener destroyed");

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	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;

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	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);
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}