[mirror_frr.git] / isisd / isis_adjacency.c

/*
 * IS-IS Rout(e)ing protocol - isis_adjacency.c
 *                             handling of IS-IS adjacencies
 *
 * Copyright (C) 2001,2002   Sampo Saaristo
 *                           Tampere University of Technology
 *                           Institute of Communications Engineering
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public Licenseas 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; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <zebra.h>

#include "log.h"
#include "memory.h"
#include "hash.h"
#include "vty.h"
#include "linklist.h"
#include "thread.h"
#include "if.h"
#include "stream.h"

#include "isisd/dict.h"
#include "isisd/isis_constants.h"
#include "isisd/isis_common.h"
#include "isisd/isis_flags.h"
#include "isisd/isisd.h"
#include "isisd/isis_circuit.h"
#include "isisd/isis_adjacency.h"
#include "isisd/isis_misc.h"
#include "isisd/isis_dr.h"
#include "isisd/isis_dynhn.h"
#include "isisd/isis_pdu.h"
#include "isisd/isis_lsp.h"
#include "isisd/isis_spf.h"
#include "isisd/isis_events.h"
#include "isisd/isis_mt.h"

extern struct isis *isis;

static struct isis_adjacency *adj_alloc(const u_char *id)
{
	struct isis_adjacency *adj;

	adj = XCALLOC(MTYPE_ISIS_ADJACENCY, sizeof(struct isis_adjacency));
	memcpy(adj->sysid, id, ISIS_SYS_ID_LEN);

	return adj;
}

struct isis_adjacency *isis_new_adj(const u_char *id, const u_char *snpa,
				    int level, struct isis_circuit *circuit)
{
	struct isis_adjacency *adj;
	int i;

	adj = adj_alloc(id); /* P2P kludge */

	if (snpa) {
		memcpy(adj->snpa, snpa, ETH_ALEN);
	} else {
		memset(adj->snpa, ' ', ETH_ALEN);
	}

	adj->circuit = circuit;
	adj->level = level;
	adj->flaps = 0;
	adj->last_flap = time(NULL);
	if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
		listnode_add(circuit->u.bc.adjdb[level - 1], adj);
		adj->dischanges[level - 1] = 0;
		for (i = 0; i < DIS_RECORDS;
		     i++) /* clear N DIS state change records */
		{
			adj->dis_record[(i * ISIS_LEVELS) + level - 1].dis =
				ISIS_UNKNOWN_DIS;
			adj->dis_record[(i * ISIS_LEVELS) + level - 1]
				.last_dis_change = time(NULL);
		}
	}

	return adj;
}

struct isis_adjacency *isis_adj_lookup(const u_char *sysid, struct list *adjdb)
{
	struct isis_adjacency *adj;
	struct listnode *node;

	for (ALL_LIST_ELEMENTS_RO(adjdb, node, adj))
		if (memcmp(adj->sysid, sysid, ISIS_SYS_ID_LEN) == 0)
			return adj;

	return NULL;
}

struct isis_adjacency *isis_adj_lookup_snpa(const u_char *ssnpa,
					    struct list *adjdb)
{
	struct listnode *node;
	struct isis_adjacency *adj;

	for (ALL_LIST_ELEMENTS_RO(adjdb, node, adj))
		if (memcmp(adj->snpa, ssnpa, ETH_ALEN) == 0)
			return adj;

	return NULL;
}

void isis_delete_adj(void *arg)
{
	struct isis_adjacency *adj = arg;

	if (!adj)
		return;

	THREAD_TIMER_OFF(adj->t_expire);

	/* remove from SPF trees */
	spftree_area_adj_del(adj->circuit->area, adj);

	if (adj->area_addresses)
		XFREE(MTYPE_ISIS_ADJACENCY_INFO, adj->area_addresses);
	if (adj->ipv4_addresses)
		XFREE(MTYPE_ISIS_ADJACENCY_INFO, adj->ipv4_addresses);
	if (adj->ipv6_addresses)
		XFREE(MTYPE_ISIS_ADJACENCY_INFO, adj->ipv6_addresses);

	adj_mt_finish(adj);

	XFREE(MTYPE_ISIS_ADJACENCY, adj);
	return;
}

static const char *adj_state2string(int state)
{

	switch (state) {
	case ISIS_ADJ_INITIALIZING:
		return "Initializing";
	case ISIS_ADJ_UP:
		return "Up";
	case ISIS_ADJ_DOWN:
		return "Down";
	default:
		return "Unknown";
	}

	return NULL; /* not reached */
}

void isis_adj_state_change(struct isis_adjacency *adj,
			   enum isis_adj_state new_state, const char *reason)
{
	int old_state;
	int level;
	struct isis_circuit *circuit;
	bool del;

	old_state = adj->adj_state;
	adj->adj_state = new_state;

	circuit = adj->circuit;

	if (isis->debugs & DEBUG_ADJ_PACKETS) {
		zlog_debug("ISIS-Adj (%s): Adjacency state change %d->%d: %s",
			   circuit->area->area_tag, old_state, new_state,
			   reason ? reason : "unspecified");
	}

	if (circuit->area->log_adj_changes) {
		const char *adj_name;
		struct isis_dynhn *dyn;

		dyn = dynhn_find_by_id(adj->sysid);
		if (dyn)
			adj_name = dyn->hostname;
		else
			adj_name = sysid_print(adj->sysid);

		zlog_info(
			"%%ADJCHANGE: Adjacency to %s (%s) changed from %s to %s, %s",
			adj_name, adj->circuit->interface->name,
			adj_state2string(old_state),
			adj_state2string(new_state),
			reason ? reason : "unspecified");
	}

	if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
		del = false;
		for (level = IS_LEVEL_1; level <= IS_LEVEL_2; level++) {
			if ((adj->level & level) == 0)
				continue;
			if (new_state == ISIS_ADJ_UP) {
				circuit->upadjcount[level - 1]++;
				isis_event_adjacency_state_change(adj,
								  new_state);
				/* update counter & timers for debugging
				 * purposes */
				adj->last_flap = time(NULL);
				adj->flaps++;
			} else if (new_state == ISIS_ADJ_DOWN) {
				listnode_delete(circuit->u.bc.adjdb[level - 1],
						adj);

				circuit->upadjcount[level - 1]--;
				if (circuit->upadjcount[level - 1] == 0)
					isis_circuit_lsp_queue_clean(circuit);

				isis_event_adjacency_state_change(adj,
								  new_state);
				del = true;
			}

			if (circuit->u.bc.lan_neighs[level - 1]) {
				list_delete_all_node(
					circuit->u.bc.lan_neighs[level - 1]);
				isis_adj_build_neigh_list(
					circuit->u.bc.adjdb[level - 1],
					circuit->u.bc.lan_neighs[level - 1]);
			}

			/* On adjacency state change send new pseudo LSP if we
			 * are the DR */
			if (circuit->u.bc.is_dr[level - 1])
				lsp_regenerate_schedule_pseudo(circuit, level);
		}

		if (del)
			isis_delete_adj(adj);

		adj = NULL;
	} else if (circuit->circ_type == CIRCUIT_T_P2P) {
		del = false;
		for (level = IS_LEVEL_1; level <= IS_LEVEL_2; level++) {
			if ((adj->level & level) == 0)
				continue;
			if (new_state == ISIS_ADJ_UP) {
				circuit->upadjcount[level - 1]++;
				isis_event_adjacency_state_change(adj,
								  new_state);

				if (adj->sys_type == ISIS_SYSTYPE_UNKNOWN)
					send_hello(circuit, level);

				/* update counter & timers for debugging
				 * purposes */
				adj->last_flap = time(NULL);
				adj->flaps++;

				/* 7.3.17 - going up on P2P -> send CSNP */
				/* FIXME: yup, I know its wrong... but i will do
				 * it! (for now) */
				send_csnp(circuit, level);
			} else if (new_state == ISIS_ADJ_DOWN) {
				if (adj->circuit->u.p2p.neighbor == adj)
					adj->circuit->u.p2p.neighbor = NULL;
				circuit->upadjcount[level - 1]--;
				if (circuit->upadjcount[level - 1] == 0)
					isis_circuit_lsp_queue_clean(circuit);

				isis_event_adjacency_state_change(adj,
								  new_state);
				del = true;
			}
		}

		if (del)
			isis_delete_adj(adj);

		adj = NULL;
	}

	return;
}


void isis_adj_print(struct isis_adjacency *adj)
{
	struct isis_dynhn *dyn;

	if (!adj)
		return;
	dyn = dynhn_find_by_id(adj->sysid);
	if (dyn)
		zlog_debug("%s", dyn->hostname);

	zlog_debug("SystemId %20s SNPA %s, level %d\nHolding Time %d",
		   sysid_print(adj->sysid), snpa_print(adj->snpa), adj->level,
		   adj->hold_time);
	if (adj->ipv4_address_count) {
		zlog_debug("IPv4 Address(es):");
		for (unsigned int i = 0; i < adj->ipv4_address_count; i++)
			zlog_debug("%s", inet_ntoa(adj->ipv4_addresses[i]));
	}

	if (adj->ipv6_address_count) {
		zlog_debug("IPv6 Address(es):");
		for (unsigned int i = 0; i < adj->ipv6_address_count; i++) {
			char buf[INET6_ADDRSTRLEN];
			inet_ntop(AF_INET6, &adj->ipv6_addresses[i], buf,
				  sizeof(buf));
			zlog_debug("%s", buf);
		}
	}
	zlog_debug("Speaks: %s", nlpid2string(&adj->nlpids));

	return;
}

int isis_adj_expire(struct thread *thread)
{
	struct isis_adjacency *adj;

	/*
	 * Get the adjacency
	 */
	adj = THREAD_ARG(thread);
	assert(adj);
	adj->t_expire = NULL;

	/* trigger the adj expire event */
	isis_adj_state_change(adj, ISIS_ADJ_DOWN, "holding time expired");

	return 0;
}

/*
 * show isis neighbor [detail]
 */
void isis_adj_print_vty(struct isis_adjacency *adj, struct vty *vty,
			char detail)
{
	time_t now;
	struct isis_dynhn *dyn;
	int level;

	dyn = dynhn_find_by_id(adj->sysid);
	if (dyn)
		vty_out(vty, "  %-20s", dyn->hostname);
	else
		vty_out(vty, "  %-20s", sysid_print(adj->sysid));

	if (detail == ISIS_UI_LEVEL_BRIEF) {
		if (adj->circuit)
			vty_out(vty, "%-12s", adj->circuit->interface->name);
		else
			vty_out(vty, "NULL circuit!");
		vty_out(vty, "%-3u", adj->level); /* level */
		vty_out(vty, "%-13s", adj_state2string(adj->adj_state));
		now = time(NULL);
		if (adj->last_upd)
			vty_out(vty, "%-9llu",
				(unsigned long long)adj->last_upd
					+ adj->hold_time - now);
		else
			vty_out(vty, "-        ");
		vty_out(vty, "%-10s", snpa_print(adj->snpa));
		vty_out(vty, "\n");
	}

	if (detail == ISIS_UI_LEVEL_DETAIL) {
		level = adj->level;
		vty_out(vty, "\n");
		if (adj->circuit)
			vty_out(vty, "    Interface: %s",
				adj->circuit->interface->name);
		else
			vty_out(vty, "    Interface: NULL circuit");
		vty_out(vty, ", Level: %u", adj->level); /* level */
		vty_out(vty, ", State: %s", adj_state2string(adj->adj_state));
		now = time(NULL);
		if (adj->last_upd)
			vty_out(vty, ", Expires in %s",
				time2string(adj->last_upd + adj->hold_time
					    - now));
		else
			vty_out(vty, ", Expires in %s",
				time2string(adj->hold_time));
		vty_out(vty, "\n");
		vty_out(vty, "    Adjacency flaps: %u", adj->flaps);
		vty_out(vty, ", Last: %s ago",
			time2string(now - adj->last_flap));
		vty_out(vty, "\n");
		vty_out(vty, "    Circuit type: %s",
			circuit_t2string(adj->circuit_t));
		vty_out(vty, ", Speaks: %s", nlpid2string(&adj->nlpids));
		vty_out(vty, "\n");
		if (adj->mt_count != 1
		    || adj->mt_set[0] != ISIS_MT_IPV4_UNICAST) {
			vty_out(vty, "    Topologies:\n");
			for (unsigned int i = 0; i < adj->mt_count; i++)
				vty_out(vty, "      %s\n",
					isis_mtid2str(adj->mt_set[i]));
		}
		vty_out(vty, "    SNPA: %s", snpa_print(adj->snpa));
		if (adj->circuit
		    && (adj->circuit->circ_type == CIRCUIT_T_BROADCAST)) {
			dyn = dynhn_find_by_id(adj->lanid);
			if (dyn)
				vty_out(vty, ", LAN id: %s.%02x", dyn->hostname,
					adj->lanid[ISIS_SYS_ID_LEN]);
			else
				vty_out(vty, ", LAN id: %s.%02x",
					sysid_print(adj->lanid),
					adj->lanid[ISIS_SYS_ID_LEN]);

			vty_out(vty, "\n");
			vty_out(vty, "    LAN Priority: %u",
				adj->prio[adj->level - 1]);

			vty_out(vty, ", %s, DIS flaps: %u, Last: %s ago",
				isis_disflag2string(
					adj->dis_record[ISIS_LEVELS + level - 1]
						.dis),
				adj->dischanges[level - 1],
				time2string(now - (adj->dis_record[ISIS_LEVELS
								   + level - 1]
							   .last_dis_change)));
		}
		vty_out(vty, "\n");

		if (adj->area_address_count) {
			vty_out(vty, "    Area Address(es):\n");
			for (unsigned int i = 0; i < adj->area_address_count;
			     i++) {
				vty_out(vty, "      %s\n",
					  isonet_print(adj->area_addresses[i]
							       .area_addr,
						       adj->area_addresses[i]
							       .addr_len));
			}
		}
		if (adj->ipv4_address_count) {
			vty_out(vty, "    IPv4 Address(es):\n");
			for (unsigned int i = 0; i < adj->ipv4_address_count;
			     i++)
				vty_out(vty, "      %s\n",
					  inet_ntoa(adj->ipv4_addresses[i]));
		}
		if (adj->ipv6_address_count) {
			vty_out(vty, "    IPv6 Address(es):\n");
			for (unsigned int i = 0; i < adj->ipv6_address_count;
			     i++) {
				char buf[INET6_ADDRSTRLEN];
				inet_ntop(AF_INET6, &adj->ipv6_addresses[i],
					  buf, sizeof(buf));
				vty_out(vty, "      %s\n", buf);
			}
		}
		vty_out(vty, "\n");
	}
	return;
}

void isis_adj_build_neigh_list(struct list *adjdb, struct list *list)
{
	struct isis_adjacency *adj;
	struct listnode *node;

	if (!list) {
		zlog_warn("isis_adj_build_neigh_list(): NULL list");
		return;
	}

	for (ALL_LIST_ELEMENTS_RO(adjdb, node, adj)) {
		if (!adj) {
			zlog_warn("isis_adj_build_neigh_list(): NULL adj");
			return;
		}

		if ((adj->adj_state == ISIS_ADJ_UP
		     || adj->adj_state == ISIS_ADJ_INITIALIZING))
			listnode_add(list, adj->snpa);
	}
	return;
}

void isis_adj_build_up_list(struct list *adjdb, struct list *list)
{
	struct isis_adjacency *adj;
	struct listnode *node;

	if (adjdb == NULL) {
		zlog_warn("isis_adj_build_up_list(): adjacency DB is empty");
		return;
	}

	if (!list) {
		zlog_warn("isis_adj_build_up_list(): NULL list");
		return;
	}

	for (ALL_LIST_ELEMENTS_RO(adjdb, node, adj)) {
		if (!adj) {
			zlog_warn("isis_adj_build_up_list(): NULL adj");
			return;
		}

		if (adj->adj_state == ISIS_ADJ_UP)
			listnode_add(list, adj);
	}

	return;
}

int isis_adj_usage2levels(enum isis_adj_usage usage)
{
	switch (usage) {
	case ISIS_ADJ_LEVEL1:
		return IS_LEVEL_1;
	case ISIS_ADJ_LEVEL2:
		return IS_LEVEL_2;
	case ISIS_ADJ_LEVEL1AND2:
		return IS_LEVEL_1 | IS_LEVEL_2;
	default:
		break;
	}
	return 0;
}
Commit	Line	Data
eb5d44eb	1	/*
d62a17ae	2	* IS-IS Rout(e)ing protocol - isis_adjacency.c
eb5d44eb	3	* handling of IS-IS adjacencies
	4	*
	5	* Copyright (C) 2001,2002 Sampo Saaristo
d62a17ae	6	* Tampere University of Technology
eb5d44eb	7	* Institute of Communications Engineering
eb5d44eb	8	*
d62a17ae	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public Licenseas published by the Free
	11	* Software Foundation; either version 2 of the License, or (at your option)
eb5d44eb	12	* any later version.
eb5d44eb	13	*
d62a17ae	14	* This program is distributed in the hope that it will be useful,but WITHOUT
	15	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	16	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
eb5d44eb	17	* more details.
896014f4 DL	18	*
	19	* You should have received a copy of the GNU General Public License along
	20	* with this program; see the file COPYING; if not, write to the Free Software
	21	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
eb5d44eb	22	*/
eb5d44eb	23
eb5d44eb	24	#include <zebra.h>
eb5d44eb	25
	26	#include "log.h"
	27	#include "memory.h"
	28	#include "hash.h"
	29	#include "vty.h"
	30	#include "linklist.h"
	31	#include "thread.h"
	32	#include "if.h"
	33	#include "stream.h"
	34
	35	#include "isisd/dict.h"
eb5d44eb	36	#include "isisd/isis_constants.h"
eb5d44eb	37	#include "isisd/isis_common.h"
3f045a08	38	#include "isisd/isis_flags.h"
eb5d44eb	39	#include "isisd/isisd.h"
	40	#include "isisd/isis_circuit.h"
	41	#include "isisd/isis_adjacency.h"
	42	#include "isisd/isis_misc.h"
	43	#include "isisd/isis_dr.h"
	44	#include "isisd/isis_dynhn.h"
	45	#include "isisd/isis_pdu.h"
3f045a08 JB	46	#include "isisd/isis_lsp.h"
	47	#include "isisd/isis_spf.h"
	48	#include "isisd/isis_events.h"
206f4aae	49	#include "isisd/isis_mt.h"
eb5d44eb	50
eb5d44eb	51	extern struct isis *isis;
eb5d44eb	52
d62a17ae	53	static struct isis_adjacency adj_alloc(const u_char id)
eb5d44eb	54	{
d62a17ae	55	struct isis_adjacency *adj;
eb5d44eb	56
d62a17ae	57	adj = XCALLOC(MTYPE_ISIS_ADJACENCY, sizeof(struct isis_adjacency));
d62a17ae	58	memcpy(adj->sysid, id, ISIS_SYS_ID_LEN);
f390d2c7	59
d62a17ae	60	return adj;
eb5d44eb	61	}
eb5d44eb	62
d62a17ae	63	struct isis_adjacency isis_new_adj(const u_char id, const u_char *snpa,
d62a17ae	64	int level, struct isis_circuit *circuit)
eb5d44eb	65	{
d62a17ae	66	struct isis_adjacency *adj;
	67	int i;
	68
	69	adj = adj_alloc(id); /* P2P kludge */
	70
d62a17ae	71	if (snpa) {
	72	memcpy(adj->snpa, snpa, ETH_ALEN);
	73	} else {
	74	memset(adj->snpa, ' ', ETH_ALEN);
eb5d44eb	75	}
eb5d44eb	76
d62a17ae	77	adj->circuit = circuit;
	78	adj->level = level;
	79	adj->flaps = 0;
	80	adj->last_flap = time(NULL);
	81	if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
	82	listnode_add(circuit->u.bc.adjdb[level - 1], adj);
	83	adj->dischanges[level - 1] = 0;
	84	for (i = 0; i < DIS_RECORDS;
	85	i++) /* clear N DIS state change records */
	86	{
	87	adj->dis_record[(i * ISIS_LEVELS) + level - 1].dis =
	88	ISIS_UNKNOWN_DIS;
	89	adj->dis_record[(i * ISIS_LEVELS) + level - 1]
	90	.last_dis_change = time(NULL);
	91	}
	92	}
	93
	94	return adj;
eb5d44eb	95	}
eb5d44eb	96
d62a17ae	97	struct isis_adjacency isis_adj_lookup(const u_char sysid, struct list *adjdb)
eb5d44eb	98	{
d62a17ae	99	struct isis_adjacency *adj;
d62a17ae	100	struct listnode *node;
eb5d44eb	101
d62a17ae	102	for (ALL_LIST_ELEMENTS_RO(adjdb, node, adj))
	103	if (memcmp(adj->sysid, sysid, ISIS_SYS_ID_LEN) == 0)
	104	return adj;
f390d2c7	105
d62a17ae	106	return NULL;
eb5d44eb	107	}
eb5d44eb	108
d62a17ae	109	struct isis_adjacency isis_adj_lookup_snpa(const u_char ssnpa,
d62a17ae	110	struct list *adjdb)
eb5d44eb	111	{
d62a17ae	112	struct listnode *node;
d62a17ae	113	struct isis_adjacency *adj;
eb5d44eb	114
d62a17ae	115	for (ALL_LIST_ELEMENTS_RO(adjdb, node, adj))
	116	if (memcmp(adj->snpa, ssnpa, ETH_ALEN) == 0)
	117	return adj;
f390d2c7	118
d62a17ae	119	return NULL;
eb5d44eb	120	}
eb5d44eb	121
d62a17ae	122	void isis_delete_adj(void *arg)
eb5d44eb	123	{
d62a17ae	124	struct isis_adjacency *adj = arg;
3f045a08	125
d62a17ae	126	if (!adj)
d62a17ae	127	return;
f390d2c7	128
d62a17ae	129	THREAD_TIMER_OFF(adj->t_expire);
3f045a08	130
d62a17ae	131	/* remove from SPF trees */
d62a17ae	132	spftree_area_adj_del(adj->circuit->area, adj);
13fb40ac	133
0c1bd758 CF	134	if (adj->area_addresses)
	135	XFREE(MTYPE_ISIS_ADJACENCY_INFO, adj->area_addresses);
	136	if (adj->ipv4_addresses)
	137	XFREE(MTYPE_ISIS_ADJACENCY_INFO, adj->ipv4_addresses);
	138	if (adj->ipv6_addresses)
	139	XFREE(MTYPE_ISIS_ADJACENCY_INFO, adj->ipv6_addresses);
3f045a08	140
d62a17ae	141	adj_mt_finish(adj);
d8fba7d9	142
d62a17ae	143	XFREE(MTYPE_ISIS_ADJACENCY, adj);
d62a17ae	144	return;
eb5d44eb	145	}
eb5d44eb	146
d62a17ae	147	static const char *adj_state2string(int state)
3f045a08 JB	148	{
3f045a08 JB	149
d62a17ae	150	switch (state) {
	151	case ISIS_ADJ_INITIALIZING:
	152	return "Initializing";
	153	case ISIS_ADJ_UP:
	154	return "Up";
	155	case ISIS_ADJ_DOWN:
	156	return "Down";
	157	default:
	158	return "Unknown";
	159	}
	160
	161	return NULL; /* not reached */
3f045a08 JB	162	}
3f045a08 JB	163
d62a17ae	164	void isis_adj_state_change(struct isis_adjacency *adj,
d62a17ae	165	enum isis_adj_state new_state, const char *reason)
eb5d44eb	166	{
d62a17ae	167	int old_state;
	168	int level;
	169	struct isis_circuit *circuit;
	170	bool del;
	171
	172	old_state = adj->adj_state;
	173	adj->adj_state = new_state;
	174
	175	circuit = adj->circuit;
	176
	177	if (isis->debugs & DEBUG_ADJ_PACKETS) {
	178	zlog_debug("ISIS-Adj (%s): Adjacency state change %d->%d: %s",
	179	circuit->area->area_tag, old_state, new_state,
	180	reason ? reason : "unspecified");
	181	}
	182
	183	if (circuit->area->log_adj_changes) {
	184	const char *adj_name;
	185	struct isis_dynhn *dyn;
	186
	187	dyn = dynhn_find_by_id(adj->sysid);
	188	if (dyn)
af8ac8f9	189	adj_name = dyn->hostname;
d62a17ae	190	else
	191	adj_name = sysid_print(adj->sysid);
	192
	193	zlog_info(
	194	"%%ADJCHANGE: Adjacency to %s (%s) changed from %s to %s, %s",
	195	adj_name, adj->circuit->interface->name,
	196	adj_state2string(old_state),
	197	adj_state2string(new_state),
	198	reason ? reason : "unspecified");
	199	}
	200
	201	if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
	202	del = false;
	203	for (level = IS_LEVEL_1; level <= IS_LEVEL_2; level++) {
	204	if ((adj->level & level) == 0)
	205	continue;
	206	if (new_state == ISIS_ADJ_UP) {
	207	circuit->upadjcount[level - 1]++;
	208	isis_event_adjacency_state_change(adj,
	209	new_state);
	210	/* update counter & timers for debugging
	211	* purposes */
	212	adj->last_flap = time(NULL);
	213	adj->flaps++;
	214	} else if (new_state == ISIS_ADJ_DOWN) {
	215	listnode_delete(circuit->u.bc.adjdb[level - 1],
	216	adj);
58e16237	217
d62a17ae	218	circuit->upadjcount[level - 1]--;
58e16237 CF	219	if (circuit->upadjcount[level - 1] == 0)
	220	isis_circuit_lsp_queue_clean(circuit);
	221
d62a17ae	222	isis_event_adjacency_state_change(adj,
	223	new_state);
	224	del = true;
	225	}
	226
	227	if (circuit->u.bc.lan_neighs[level - 1]) {
	228	list_delete_all_node(
	229	circuit->u.bc.lan_neighs[level - 1]);
	230	isis_adj_build_neigh_list(
	231	circuit->u.bc.adjdb[level - 1],
	232	circuit->u.bc.lan_neighs[level - 1]);
	233	}
	234
	235	/* On adjacency state change send new pseudo LSP if we
	236	* are the DR */
	237	if (circuit->u.bc.is_dr[level - 1])
	238	lsp_regenerate_schedule_pseudo(circuit, level);
	239	}
	240
	241	if (del)
	242	isis_delete_adj(adj);
	243
	244	adj = NULL;
	245	} else if (circuit->circ_type == CIRCUIT_T_P2P) {
	246	del = false;
	247	for (level = IS_LEVEL_1; level <= IS_LEVEL_2; level++) {
	248	if ((adj->level & level) == 0)
	249	continue;
	250	if (new_state == ISIS_ADJ_UP) {
	251	circuit->upadjcount[level - 1]++;
	252	isis_event_adjacency_state_change(adj,
	253	new_state);
	254
	255	if (adj->sys_type == ISIS_SYSTYPE_UNKNOWN)
	256	send_hello(circuit, level);
	257
	258	/* update counter & timers for debugging
	259	* purposes */
	260	adj->last_flap = time(NULL);
	261	adj->flaps++;
	262
	263	/* 7.3.17 - going up on P2P -> send CSNP */
	264	/* FIXME: yup, I know its wrong... but i will do
	265	* it! (for now) */
	266	send_csnp(circuit, level);
	267	} else if (new_state == ISIS_ADJ_DOWN) {
	268	if (adj->circuit->u.p2p.neighbor == adj)
	269	adj->circuit->u.p2p.neighbor = NULL;
	270	circuit->upadjcount[level - 1]--;
58e16237 CF	271	if (circuit->upadjcount[level - 1] == 0)
	272	isis_circuit_lsp_queue_clean(circuit);
	273
d62a17ae	274	isis_event_adjacency_state_change(adj,
	275	new_state);
	276	del = true;
	277	}
	278	}
	279
	280	if (del)
	281	isis_delete_adj(adj);
	282
	283	adj = NULL;
	284	}
	285
	286	return;
eb5d44eb	287	}
	288
	289
d62a17ae	290	void isis_adj_print(struct isis_adjacency *adj)
eb5d44eb	291	{
d62a17ae	292	struct isis_dynhn *dyn;
d62a17ae	293
	294	if (!adj)
	295	return;
	296	dyn = dynhn_find_by_id(adj->sysid);
	297	if (dyn)
af8ac8f9	298	zlog_debug("%s", dyn->hostname);
d62a17ae	299
	300	zlog_debug("SystemId %20s SNPA %s, level %d\nHolding Time %d",
	301	sysid_print(adj->sysid), snpa_print(adj->snpa), adj->level,
	302	adj->hold_time);
0c1bd758	303	if (adj->ipv4_address_count) {
d62a17ae	304	zlog_debug("IPv4 Address(es):");
0c1bd758 CF	305	for (unsigned int i = 0; i < adj->ipv4_address_count; i++)
0c1bd758 CF	306	zlog_debug("%s", inet_ntoa(adj->ipv4_addresses[i]));
d62a17ae	307	}
d62a17ae	308
0c1bd758	309	if (adj->ipv6_address_count) {
d62a17ae	310	zlog_debug("IPv6 Address(es):");
0c1bd758 CF	311	for (unsigned int i = 0; i < adj->ipv6_address_count; i++) {
	312	char buf[INET6_ADDRSTRLEN];
	313	inet_ntop(AF_INET6, &adj->ipv6_addresses[i], buf,
	314	sizeof(buf));
	315	zlog_debug("%s", buf);
d62a17ae	316	}
f390d2c7	317	}
d62a17ae	318	zlog_debug("Speaks: %s", nlpid2string(&adj->nlpids));
eb5d44eb	319
d62a17ae	320	return;
eb5d44eb	321	}
eb5d44eb	322
d62a17ae	323	int isis_adj_expire(struct thread *thread)
eb5d44eb	324	{
d62a17ae	325	struct isis_adjacency *adj;
eb5d44eb	326
d62a17ae	327	/*
	328	* Get the adjacency
	329	*/
	330	adj = THREAD_ARG(thread);
	331	assert(adj);
	332	adj->t_expire = NULL;
eb5d44eb	333
d62a17ae	334	/* trigger the adj expire event */
d62a17ae	335	isis_adj_state_change(adj, ISIS_ADJ_DOWN, "holding time expired");
eb5d44eb	336
d62a17ae	337	return 0;
eb5d44eb	338	}
eb5d44eb	339
eb5d44eb	340	/*
3f045a08	341	* show isis neighbor [detail]
eb5d44eb	342	*/
d62a17ae	343	void isis_adj_print_vty(struct isis_adjacency adj, struct vty vty,
d62a17ae	344	char detail)
eb5d44eb	345	{
d62a17ae	346	time_t now;
	347	struct isis_dynhn *dyn;
	348	int level;
d62a17ae	349
	350	dyn = dynhn_find_by_id(adj->sysid);
	351	if (dyn)
af8ac8f9	352	vty_out(vty, " %-20s", dyn->hostname);
d62a17ae	353	else
	354	vty_out(vty, " %-20s", sysid_print(adj->sysid));
	355
	356	if (detail == ISIS_UI_LEVEL_BRIEF) {
	357	if (adj->circuit)
	358	vty_out(vty, "%-12s", adj->circuit->interface->name);
	359	else
	360	vty_out(vty, "NULL circuit!");
	361	vty_out(vty, "%-3u", adj->level); /* level */
	362	vty_out(vty, "%-13s", adj_state2string(adj->adj_state));
	363	now = time(NULL);
	364	if (adj->last_upd)
	365	vty_out(vty, "%-9llu",
	366	(unsigned long long)adj->last_upd
	367	+ adj->hold_time - now);
	368	else
	369	vty_out(vty, "- ");
	370	vty_out(vty, "%-10s", snpa_print(adj->snpa));
	371	vty_out(vty, "\n");
f390d2c7	372	}
d62a17ae	373
	374	if (detail == ISIS_UI_LEVEL_DETAIL) {
	375	level = adj->level;
	376	vty_out(vty, "\n");
	377	if (adj->circuit)
	378	vty_out(vty, " Interface: %s",
	379	adj->circuit->interface->name);
	380	else
	381	vty_out(vty, " Interface: NULL circuit");
	382	vty_out(vty, ", Level: %u", adj->level); /* level */
	383	vty_out(vty, ", State: %s", adj_state2string(adj->adj_state));
	384	now = time(NULL);
	385	if (adj->last_upd)
	386	vty_out(vty, ", Expires in %s",
	387	time2string(adj->last_upd + adj->hold_time
	388	- now));
	389	else
	390	vty_out(vty, ", Expires in %s",
	391	time2string(adj->hold_time));
	392	vty_out(vty, "\n");
	393	vty_out(vty, " Adjacency flaps: %u", adj->flaps);
	394	vty_out(vty, ", Last: %s ago",
	395	time2string(now - adj->last_flap));
	396	vty_out(vty, "\n");
	397	vty_out(vty, " Circuit type: %s",
	398	circuit_t2string(adj->circuit_t));
	399	vty_out(vty, ", Speaks: %s", nlpid2string(&adj->nlpids));
	400	vty_out(vty, "\n");
	401	if (adj->mt_count != 1
	402	\|\| adj->mt_set[0] != ISIS_MT_IPV4_UNICAST) {
	403	vty_out(vty, " Topologies:\n");
	404	for (unsigned int i = 0; i < adj->mt_count; i++)
	405	vty_out(vty, " %s\n",
	406	isis_mtid2str(adj->mt_set[i]));
	407	}
	408	vty_out(vty, " SNPA: %s", snpa_print(adj->snpa));
	409	if (adj->circuit
	410	&& (adj->circuit->circ_type == CIRCUIT_T_BROADCAST)) {
	411	dyn = dynhn_find_by_id(adj->lanid);
	412	if (dyn)
af8ac8f9	413	vty_out(vty, ", LAN id: %s.%02x", dyn->hostname,
d62a17ae	414	adj->lanid[ISIS_SYS_ID_LEN]);
	415	else
	416	vty_out(vty, ", LAN id: %s.%02x",
	417	sysid_print(adj->lanid),
	418	adj->lanid[ISIS_SYS_ID_LEN]);
	419
	420	vty_out(vty, "\n");
	421	vty_out(vty, " LAN Priority: %u",
	422	adj->prio[adj->level - 1]);
	423
	424	vty_out(vty, ", %s, DIS flaps: %u, Last: %s ago",
	425	isis_disflag2string(
	426	adj->dis_record[ISIS_LEVELS + level - 1]
	427	.dis),
	428	adj->dischanges[level - 1],
9d303b37 DL	429	time2string(now - (adj->dis_record[ISIS_LEVELS
	430	+ level - 1]
	431	.last_dis_change)));
d62a17ae	432	}
	433	vty_out(vty, "\n");
	434
0c1bd758	435	if (adj->area_address_count) {
d62a17ae	436	vty_out(vty, " Area Address(es):\n");
0c1bd758 CF	437	for (unsigned int i = 0; i < adj->area_address_count;
0c1bd758 CF	438	i++) {
d62a17ae	439	vty_out(vty, " %s\n",
0c1bd758 CF	440	isonet_print(adj->area_addresses[i]
	441	.area_addr,
	442	adj->area_addresses[i]
	443	.addr_len));
	444	}
d62a17ae	445	}
0c1bd758	446	if (adj->ipv4_address_count) {
d62a17ae	447	vty_out(vty, " IPv4 Address(es):\n");
0c1bd758 CF	448	for (unsigned int i = 0; i < adj->ipv4_address_count;
	449	i++)
	450	vty_out(vty, " %s\n",
	451	inet_ntoa(adj->ipv4_addresses[i]));
d62a17ae	452	}
0c1bd758	453	if (adj->ipv6_address_count) {
d62a17ae	454	vty_out(vty, " IPv6 Address(es):\n");
0c1bd758 CF	455	for (unsigned int i = 0; i < adj->ipv6_address_count;
	456	i++) {
	457	char buf[INET6_ADDRSTRLEN];
	458	inet_ntop(AF_INET6, &adj->ipv6_addresses[i],
	459	buf, sizeof(buf));
	460	vty_out(vty, " %s\n", buf);
d62a17ae	461	}
	462	}
	463	vty_out(vty, "\n");
f390d2c7	464	}
d62a17ae	465	return;
eb5d44eb	466	}
eb5d44eb	467
d62a17ae	468	void isis_adj_build_neigh_list(struct list adjdb, struct list list)
eb5d44eb	469	{
d62a17ae	470	struct isis_adjacency *adj;
	471	struct listnode *node;
	472
	473	if (!list) {
	474	zlog_warn("isis_adj_build_neigh_list(): NULL list");
	475	return;
f390d2c7	476	}
f390d2c7	477
d62a17ae	478	for (ALL_LIST_ELEMENTS_RO(adjdb, node, adj)) {
	479	if (!adj) {
	480	zlog_warn("isis_adj_build_neigh_list(): NULL adj");
	481	return;
	482	}
	483
	484	if ((adj->adj_state == ISIS_ADJ_UP
	485	\|\| adj->adj_state == ISIS_ADJ_INITIALIZING))
	486	listnode_add(list, adj->snpa);
	487	}
	488	return;
eb5d44eb	489	}
eb5d44eb	490
d62a17ae	491	void isis_adj_build_up_list(struct list adjdb, struct list list)
eb5d44eb	492	{
d62a17ae	493	struct isis_adjacency *adj;
	494	struct listnode *node;
	495
	496	if (adjdb == NULL) {
	497	zlog_warn("isis_adj_build_up_list(): adjacency DB is empty");
	498	return;
	499	}
	500
	501	if (!list) {
	502	zlog_warn("isis_adj_build_up_list(): NULL list");
	503	return;
f390d2c7	504	}
f390d2c7	505
d62a17ae	506	for (ALL_LIST_ELEMENTS_RO(adjdb, node, adj)) {
	507	if (!adj) {
	508	zlog_warn("isis_adj_build_up_list(): NULL adj");
	509	return;
	510	}
f390d2c7	511
d62a17ae	512	if (adj->adj_state == ISIS_ADJ_UP)
	513	listnode_add(list, adj);
	514	}
	515
	516	return;
eb5d44eb	517	}
d8fba7d9	518
d62a17ae	519	int isis_adj_usage2levels(enum isis_adj_usage usage)
d8fba7d9	520	{
d62a17ae	521	switch (usage) {
	522	case ISIS_ADJ_LEVEL1:
	523	return IS_LEVEL_1;
	524	case ISIS_ADJ_LEVEL2:
	525	return IS_LEVEL_2;
	526	case ISIS_ADJ_LEVEL1AND2:
	527	return IS_LEVEL_1 \| IS_LEVEL_2;
	528	default:
	529	break;
	530	}
	531	return 0;
d8fba7d9	532	}