[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"
#include "isisd/isis_tlvs.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);
	adj->threeway_state = ISIS_THREEWAY_DOWN;
	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_process_threeway(struct isis_adjacency *adj,
			       struct isis_threeway_adj *tw_adj,
			       enum isis_adj_usage adj_usage)
{
	enum isis_threeway_state next_tw_state = ISIS_THREEWAY_DOWN;

	if (tw_adj && !adj->circuit->disable_threeway_adj) {
		if (tw_adj->state == ISIS_THREEWAY_DOWN) {
			next_tw_state = ISIS_THREEWAY_INITIALIZING;
		} else if (tw_adj->state == ISIS_THREEWAY_INITIALIZING) {
			next_tw_state = ISIS_THREEWAY_UP;
		} else if (tw_adj->state == ISIS_THREEWAY_UP) {
			if (adj->threeway_state == ISIS_THREEWAY_DOWN)
				next_tw_state = ISIS_THREEWAY_DOWN;
			else
				next_tw_state = ISIS_THREEWAY_UP;
		}
	} else {
		next_tw_state = ISIS_THREEWAY_UP;
	}

	if (next_tw_state != adj->threeway_state) {
		if (isis->debugs & DEBUG_ADJ_PACKETS) {
			zlog_info("ISIS-Adj (%s): Threeway state change %s to %s",
				  adj->circuit->area->area_tag,
				  isis_threeway_state_name(adj->threeway_state),
				  isis_threeway_state_name(next_tw_state));
		}
	}

	if (next_tw_state == ISIS_THREEWAY_DOWN) {
		isis_adj_state_change(adj, ISIS_ADJ_DOWN, "Neighbor restarted");
		return;
	}

	if (next_tw_state == ISIS_THREEWAY_UP) {
		if (adj->adj_state != ISIS_ADJ_UP) {
			isis_adj_state_change(adj, ISIS_ADJ_UP, NULL);
			adj->adj_usage = adj_usage;
		}
	}

	adj->threeway_state = next_tw_state;
}

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"
42fe2621	50	#include "isisd/isis_tlvs.h"
eb5d44eb	51
eb5d44eb	52	extern struct isis *isis;
eb5d44eb	53
d62a17ae	54	static struct isis_adjacency adj_alloc(const u_char id)
eb5d44eb	55	{
d62a17ae	56	struct isis_adjacency *adj;
eb5d44eb	57
d62a17ae	58	adj = XCALLOC(MTYPE_ISIS_ADJACENCY, sizeof(struct isis_adjacency));
d62a17ae	59	memcpy(adj->sysid, id, ISIS_SYS_ID_LEN);
f390d2c7	60
d62a17ae	61	return adj;
eb5d44eb	62	}
eb5d44eb	63
d62a17ae	64	struct isis_adjacency isis_new_adj(const u_char id, const u_char *snpa,
d62a17ae	65	int level, struct isis_circuit *circuit)
eb5d44eb	66	{
d62a17ae	67	struct isis_adjacency *adj;
	68	int i;
	69
	70	adj = adj_alloc(id); /* P2P kludge */
	71
d62a17ae	72	if (snpa) {
	73	memcpy(adj->snpa, snpa, ETH_ALEN);
	74	} else {
	75	memset(adj->snpa, ' ', ETH_ALEN);
eb5d44eb	76	}
eb5d44eb	77
d62a17ae	78	adj->circuit = circuit;
	79	adj->level = level;
	80	adj->flaps = 0;
	81	adj->last_flap = time(NULL);
42fe2621	82	adj->threeway_state = ISIS_THREEWAY_DOWN;
d62a17ae	83	if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
	84	listnode_add(circuit->u.bc.adjdb[level - 1], adj);
	85	adj->dischanges[level - 1] = 0;
	86	for (i = 0; i < DIS_RECORDS;
	87	i++) /* clear N DIS state change records */
	88	{
	89	adj->dis_record[(i * ISIS_LEVELS) + level - 1].dis =
	90	ISIS_UNKNOWN_DIS;
	91	adj->dis_record[(i * ISIS_LEVELS) + level - 1]
	92	.last_dis_change = time(NULL);
	93	}
	94	}
	95
	96	return adj;
eb5d44eb	97	}
eb5d44eb	98
d62a17ae	99	struct isis_adjacency isis_adj_lookup(const u_char sysid, struct list *adjdb)
eb5d44eb	100	{
d62a17ae	101	struct isis_adjacency *adj;
d62a17ae	102	struct listnode *node;
eb5d44eb	103
d62a17ae	104	for (ALL_LIST_ELEMENTS_RO(adjdb, node, adj))
	105	if (memcmp(adj->sysid, sysid, ISIS_SYS_ID_LEN) == 0)
	106	return adj;
f390d2c7	107
d62a17ae	108	return NULL;
eb5d44eb	109	}
eb5d44eb	110
d62a17ae	111	struct isis_adjacency isis_adj_lookup_snpa(const u_char ssnpa,
d62a17ae	112	struct list *adjdb)
eb5d44eb	113	{
d62a17ae	114	struct listnode *node;
d62a17ae	115	struct isis_adjacency *adj;
eb5d44eb	116
d62a17ae	117	for (ALL_LIST_ELEMENTS_RO(adjdb, node, adj))
	118	if (memcmp(adj->snpa, ssnpa, ETH_ALEN) == 0)
	119	return adj;
f390d2c7	120
d62a17ae	121	return NULL;
eb5d44eb	122	}
eb5d44eb	123
d62a17ae	124	void isis_delete_adj(void *arg)
eb5d44eb	125	{
d62a17ae	126	struct isis_adjacency *adj = arg;
3f045a08	127
d62a17ae	128	if (!adj)
d62a17ae	129	return;
f390d2c7	130
d62a17ae	131	THREAD_TIMER_OFF(adj->t_expire);
3f045a08	132
d62a17ae	133	/* remove from SPF trees */
d62a17ae	134	spftree_area_adj_del(adj->circuit->area, adj);
13fb40ac	135
0c1bd758 CF	136	if (adj->area_addresses)
	137	XFREE(MTYPE_ISIS_ADJACENCY_INFO, adj->area_addresses);
	138	if (adj->ipv4_addresses)
	139	XFREE(MTYPE_ISIS_ADJACENCY_INFO, adj->ipv4_addresses);
	140	if (adj->ipv6_addresses)
	141	XFREE(MTYPE_ISIS_ADJACENCY_INFO, adj->ipv6_addresses);
3f045a08	142
d62a17ae	143	adj_mt_finish(adj);
d8fba7d9	144
d62a17ae	145	XFREE(MTYPE_ISIS_ADJACENCY, adj);
d62a17ae	146	return;
eb5d44eb	147	}
eb5d44eb	148
d62a17ae	149	static const char *adj_state2string(int state)
3f045a08 JB	150	{
3f045a08 JB	151
d62a17ae	152	switch (state) {
	153	case ISIS_ADJ_INITIALIZING:
	154	return "Initializing";
	155	case ISIS_ADJ_UP:
	156	return "Up";
	157	case ISIS_ADJ_DOWN:
	158	return "Down";
	159	default:
	160	return "Unknown";
	161	}
	162
	163	return NULL; /* not reached */
3f045a08 JB	164	}
3f045a08 JB	165
42fe2621 CF	166	void isis_adj_process_threeway(struct isis_adjacency *adj,
	167	struct isis_threeway_adj *tw_adj,
	168	enum isis_adj_usage adj_usage)
	169	{
	170	enum isis_threeway_state next_tw_state = ISIS_THREEWAY_DOWN;
	171
58e5d748	172	if (tw_adj && !adj->circuit->disable_threeway_adj) {
42fe2621 CF	173	if (tw_adj->state == ISIS_THREEWAY_DOWN) {
	174	next_tw_state = ISIS_THREEWAY_INITIALIZING;
	175	} else if (tw_adj->state == ISIS_THREEWAY_INITIALIZING) {
	176	next_tw_state = ISIS_THREEWAY_UP;
	177	} else if (tw_adj->state == ISIS_THREEWAY_UP) {
	178	if (adj->threeway_state == ISIS_THREEWAY_DOWN)
	179	next_tw_state = ISIS_THREEWAY_DOWN;
	180	else
	181	next_tw_state = ISIS_THREEWAY_UP;
	182	}
	183	} else {
	184	next_tw_state = ISIS_THREEWAY_UP;
	185	}
	186
	187	if (next_tw_state != adj->threeway_state) {
	188	if (isis->debugs & DEBUG_ADJ_PACKETS) {
	189	zlog_info("ISIS-Adj (%s): Threeway state change %s to %s",
	190	adj->circuit->area->area_tag,
	191	isis_threeway_state_name(adj->threeway_state),
	192	isis_threeway_state_name(next_tw_state));
	193	}
	194	}
	195
	196	if (next_tw_state == ISIS_THREEWAY_DOWN) {
	197	isis_adj_state_change(adj, ISIS_ADJ_DOWN, "Neighbor restarted");
	198	return;
	199	}
	200
	201	if (next_tw_state == ISIS_THREEWAY_UP) {
	202	if (adj->adj_state != ISIS_ADJ_UP) {
	203	isis_adj_state_change(adj, ISIS_ADJ_UP, NULL);
	204	adj->adj_usage = adj_usage;
	205	}
	206	}
	207
	208	adj->threeway_state = next_tw_state;
	209	}
	210
d62a17ae	211	void isis_adj_state_change(struct isis_adjacency *adj,
d62a17ae	212	enum isis_adj_state new_state, const char *reason)
eb5d44eb	213	{
d62a17ae	214	int old_state;
	215	int level;
	216	struct isis_circuit *circuit;
	217	bool del;
	218
	219	old_state = adj->adj_state;
	220	adj->adj_state = new_state;
	221
	222	circuit = adj->circuit;
	223
	224	if (isis->debugs & DEBUG_ADJ_PACKETS) {
	225	zlog_debug("ISIS-Adj (%s): Adjacency state change %d->%d: %s",
	226	circuit->area->area_tag, old_state, new_state,
	227	reason ? reason : "unspecified");
	228	}
	229
	230	if (circuit->area->log_adj_changes) {
	231	const char *adj_name;
	232	struct isis_dynhn *dyn;
	233
	234	dyn = dynhn_find_by_id(adj->sysid);
	235	if (dyn)
af8ac8f9	236	adj_name = dyn->hostname;
d62a17ae	237	else
	238	adj_name = sysid_print(adj->sysid);
	239
	240	zlog_info(
	241	"%%ADJCHANGE: Adjacency to %s (%s) changed from %s to %s, %s",
	242	adj_name, adj->circuit->interface->name,
	243	adj_state2string(old_state),
	244	adj_state2string(new_state),
	245	reason ? reason : "unspecified");
	246	}
	247
	248	if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
	249	del = false;
	250	for (level = IS_LEVEL_1; level <= IS_LEVEL_2; level++) {
	251	if ((adj->level & level) == 0)
	252	continue;
	253	if (new_state == ISIS_ADJ_UP) {
	254	circuit->upadjcount[level - 1]++;
	255	isis_event_adjacency_state_change(adj,
	256	new_state);
	257	/* update counter & timers for debugging
	258	* purposes */
	259	adj->last_flap = time(NULL);
	260	adj->flaps++;
	261	} else if (new_state == ISIS_ADJ_DOWN) {
	262	listnode_delete(circuit->u.bc.adjdb[level - 1],
	263	adj);
58e16237	264
d62a17ae	265	circuit->upadjcount[level - 1]--;
58e16237 CF	266	if (circuit->upadjcount[level - 1] == 0)
	267	isis_circuit_lsp_queue_clean(circuit);
	268
d62a17ae	269	isis_event_adjacency_state_change(adj,
	270	new_state);
	271	del = true;
	272	}
	273
	274	if (circuit->u.bc.lan_neighs[level - 1]) {
	275	list_delete_all_node(
	276	circuit->u.bc.lan_neighs[level - 1]);
	277	isis_adj_build_neigh_list(
	278	circuit->u.bc.adjdb[level - 1],
	279	circuit->u.bc.lan_neighs[level - 1]);
	280	}
	281
	282	/* On adjacency state change send new pseudo LSP if we
	283	* are the DR */
	284	if (circuit->u.bc.is_dr[level - 1])
	285	lsp_regenerate_schedule_pseudo(circuit, level);
	286	}
	287
	288	if (del)
	289	isis_delete_adj(adj);
	290
	291	adj = NULL;
	292	} else if (circuit->circ_type == CIRCUIT_T_P2P) {
	293	del = false;
	294	for (level = IS_LEVEL_1; level <= IS_LEVEL_2; level++) {
	295	if ((adj->level & level) == 0)
	296	continue;
	297	if (new_state == ISIS_ADJ_UP) {
	298	circuit->upadjcount[level - 1]++;
	299	isis_event_adjacency_state_change(adj,
	300	new_state);
	301
	302	if (adj->sys_type == ISIS_SYSTYPE_UNKNOWN)
	303	send_hello(circuit, level);
	304
	305	/* update counter & timers for debugging
	306	* purposes */
	307	adj->last_flap = time(NULL);
	308	adj->flaps++;
	309
	310	/* 7.3.17 - going up on P2P -> send CSNP */
	311	/* FIXME: yup, I know its wrong... but i will do
	312	* it! (for now) */
	313	send_csnp(circuit, level);
	314	} else if (new_state == ISIS_ADJ_DOWN) {
	315	if (adj->circuit->u.p2p.neighbor == adj)
	316	adj->circuit->u.p2p.neighbor = NULL;
	317	circuit->upadjcount[level - 1]--;
58e16237 CF	318	if (circuit->upadjcount[level - 1] == 0)
	319	isis_circuit_lsp_queue_clean(circuit);
	320
d62a17ae	321	isis_event_adjacency_state_change(adj,
	322	new_state);
	323	del = true;
	324	}
	325	}
	326
	327	if (del)
	328	isis_delete_adj(adj);
	329
	330	adj = NULL;
	331	}
	332
	333	return;
eb5d44eb	334	}
	335
	336
d62a17ae	337	void isis_adj_print(struct isis_adjacency *adj)
eb5d44eb	338	{
d62a17ae	339	struct isis_dynhn *dyn;
d62a17ae	340
	341	if (!adj)
	342	return;
	343	dyn = dynhn_find_by_id(adj->sysid);
	344	if (dyn)
af8ac8f9	345	zlog_debug("%s", dyn->hostname);
d62a17ae	346
	347	zlog_debug("SystemId %20s SNPA %s, level %d\nHolding Time %d",
	348	sysid_print(adj->sysid), snpa_print(adj->snpa), adj->level,
	349	adj->hold_time);
0c1bd758	350	if (adj->ipv4_address_count) {
d62a17ae	351	zlog_debug("IPv4 Address(es):");
0c1bd758 CF	352	for (unsigned int i = 0; i < adj->ipv4_address_count; i++)
0c1bd758 CF	353	zlog_debug("%s", inet_ntoa(adj->ipv4_addresses[i]));
d62a17ae	354	}
d62a17ae	355
0c1bd758	356	if (adj->ipv6_address_count) {
d62a17ae	357	zlog_debug("IPv6 Address(es):");
0c1bd758 CF	358	for (unsigned int i = 0; i < adj->ipv6_address_count; i++) {
	359	char buf[INET6_ADDRSTRLEN];
	360	inet_ntop(AF_INET6, &adj->ipv6_addresses[i], buf,
	361	sizeof(buf));
	362	zlog_debug("%s", buf);
d62a17ae	363	}
f390d2c7	364	}
d62a17ae	365	zlog_debug("Speaks: %s", nlpid2string(&adj->nlpids));
eb5d44eb	366
d62a17ae	367	return;
eb5d44eb	368	}
eb5d44eb	369
d62a17ae	370	int isis_adj_expire(struct thread *thread)
eb5d44eb	371	{
d62a17ae	372	struct isis_adjacency *adj;
eb5d44eb	373
d62a17ae	374	/*
	375	* Get the adjacency
	376	*/
	377	adj = THREAD_ARG(thread);
	378	assert(adj);
	379	adj->t_expire = NULL;
eb5d44eb	380
d62a17ae	381	/* trigger the adj expire event */
d62a17ae	382	isis_adj_state_change(adj, ISIS_ADJ_DOWN, "holding time expired");
eb5d44eb	383
d62a17ae	384	return 0;
eb5d44eb	385	}
eb5d44eb	386
eb5d44eb	387	/*
3f045a08	388	* show isis neighbor [detail]
eb5d44eb	389	*/
d62a17ae	390	void isis_adj_print_vty(struct isis_adjacency adj, struct vty vty,
d62a17ae	391	char detail)
eb5d44eb	392	{
d62a17ae	393	time_t now;
	394	struct isis_dynhn *dyn;
	395	int level;
d62a17ae	396
	397	dyn = dynhn_find_by_id(adj->sysid);
	398	if (dyn)
af8ac8f9	399	vty_out(vty, " %-20s", dyn->hostname);
d62a17ae	400	else
	401	vty_out(vty, " %-20s", sysid_print(adj->sysid));
	402
	403	if (detail == ISIS_UI_LEVEL_BRIEF) {
	404	if (adj->circuit)
	405	vty_out(vty, "%-12s", adj->circuit->interface->name);
	406	else
	407	vty_out(vty, "NULL circuit!");
	408	vty_out(vty, "%-3u", adj->level); /* level */
	409	vty_out(vty, "%-13s", adj_state2string(adj->adj_state));
	410	now = time(NULL);
	411	if (adj->last_upd)
	412	vty_out(vty, "%-9llu",
	413	(unsigned long long)adj->last_upd
	414	+ adj->hold_time - now);
	415	else
	416	vty_out(vty, "- ");
	417	vty_out(vty, "%-10s", snpa_print(adj->snpa));
	418	vty_out(vty, "\n");
f390d2c7	419	}
d62a17ae	420
	421	if (detail == ISIS_UI_LEVEL_DETAIL) {
	422	level = adj->level;
	423	vty_out(vty, "\n");
	424	if (adj->circuit)
	425	vty_out(vty, " Interface: %s",
	426	adj->circuit->interface->name);
	427	else
	428	vty_out(vty, " Interface: NULL circuit");
	429	vty_out(vty, ", Level: %u", adj->level); /* level */
	430	vty_out(vty, ", State: %s", adj_state2string(adj->adj_state));
	431	now = time(NULL);
	432	if (adj->last_upd)
	433	vty_out(vty, ", Expires in %s",
	434	time2string(adj->last_upd + adj->hold_time
	435	- now));
	436	else
	437	vty_out(vty, ", Expires in %s",
	438	time2string(adj->hold_time));
	439	vty_out(vty, "\n");
	440	vty_out(vty, " Adjacency flaps: %u", adj->flaps);
	441	vty_out(vty, ", Last: %s ago",
	442	time2string(now - adj->last_flap));
	443	vty_out(vty, "\n");
	444	vty_out(vty, " Circuit type: %s",
	445	circuit_t2string(adj->circuit_t));
	446	vty_out(vty, ", Speaks: %s", nlpid2string(&adj->nlpids));
	447	vty_out(vty, "\n");
	448	if (adj->mt_count != 1
	449	\|\| adj->mt_set[0] != ISIS_MT_IPV4_UNICAST) {
	450	vty_out(vty, " Topologies:\n");
	451	for (unsigned int i = 0; i < adj->mt_count; i++)
	452	vty_out(vty, " %s\n",
	453	isis_mtid2str(adj->mt_set[i]));
	454	}
	455	vty_out(vty, " SNPA: %s", snpa_print(adj->snpa));
	456	if (adj->circuit
	457	&& (adj->circuit->circ_type == CIRCUIT_T_BROADCAST)) {
	458	dyn = dynhn_find_by_id(adj->lanid);
	459	if (dyn)
af8ac8f9	460	vty_out(vty, ", LAN id: %s.%02x", dyn->hostname,
d62a17ae	461	adj->lanid[ISIS_SYS_ID_LEN]);
	462	else
	463	vty_out(vty, ", LAN id: %s.%02x",
	464	sysid_print(adj->lanid),
	465	adj->lanid[ISIS_SYS_ID_LEN]);
	466
	467	vty_out(vty, "\n");
	468	vty_out(vty, " LAN Priority: %u",
	469	adj->prio[adj->level - 1]);
	470
	471	vty_out(vty, ", %s, DIS flaps: %u, Last: %s ago",
	472	isis_disflag2string(
	473	adj->dis_record[ISIS_LEVELS + level - 1]
	474	.dis),
	475	adj->dischanges[level - 1],
9d303b37 DL	476	time2string(now - (adj->dis_record[ISIS_LEVELS
	477	+ level - 1]
	478	.last_dis_change)));
d62a17ae	479	}
	480	vty_out(vty, "\n");
	481
0c1bd758	482	if (adj->area_address_count) {
d62a17ae	483	vty_out(vty, " Area Address(es):\n");
0c1bd758 CF	484	for (unsigned int i = 0; i < adj->area_address_count;
0c1bd758 CF	485	i++) {
d62a17ae	486	vty_out(vty, " %s\n",
996c9314 LB	487	isonet_print(adj->area_addresses[i]
	488	.area_addr,
	489	adj->area_addresses[i]
	490	.addr_len));
0c1bd758	491	}
d62a17ae	492	}
0c1bd758	493	if (adj->ipv4_address_count) {
d62a17ae	494	vty_out(vty, " IPv4 Address(es):\n");
0c1bd758 CF	495	for (unsigned int i = 0; i < adj->ipv4_address_count;
	496	i++)
	497	vty_out(vty, " %s\n",
996c9314	498	inet_ntoa(adj->ipv4_addresses[i]));
d62a17ae	499	}
0c1bd758	500	if (adj->ipv6_address_count) {
d62a17ae	501	vty_out(vty, " IPv6 Address(es):\n");
0c1bd758 CF	502	for (unsigned int i = 0; i < adj->ipv6_address_count;
	503	i++) {
	504	char buf[INET6_ADDRSTRLEN];
	505	inet_ntop(AF_INET6, &adj->ipv6_addresses[i],
	506	buf, sizeof(buf));
	507	vty_out(vty, " %s\n", buf);
d62a17ae	508	}
	509	}
	510	vty_out(vty, "\n");
f390d2c7	511	}
d62a17ae	512	return;
eb5d44eb	513	}
eb5d44eb	514
d62a17ae	515	void isis_adj_build_neigh_list(struct list adjdb, struct list list)
eb5d44eb	516	{
d62a17ae	517	struct isis_adjacency *adj;
	518	struct listnode *node;
	519
	520	if (!list) {
	521	zlog_warn("isis_adj_build_neigh_list(): NULL list");
	522	return;
f390d2c7	523	}
f390d2c7	524
d62a17ae	525	for (ALL_LIST_ELEMENTS_RO(adjdb, node, adj)) {
	526	if (!adj) {
	527	zlog_warn("isis_adj_build_neigh_list(): NULL adj");
	528	return;
	529	}
	530
	531	if ((adj->adj_state == ISIS_ADJ_UP
	532	\|\| adj->adj_state == ISIS_ADJ_INITIALIZING))
	533	listnode_add(list, adj->snpa);
	534	}
	535	return;
eb5d44eb	536	}
eb5d44eb	537
d62a17ae	538	void isis_adj_build_up_list(struct list adjdb, struct list list)
eb5d44eb	539	{
d62a17ae	540	struct isis_adjacency *adj;
	541	struct listnode *node;
	542
	543	if (adjdb == NULL) {
	544	zlog_warn("isis_adj_build_up_list(): adjacency DB is empty");
	545	return;
	546	}
	547
	548	if (!list) {
	549	zlog_warn("isis_adj_build_up_list(): NULL list");
	550	return;
f390d2c7	551	}
f390d2c7	552
d62a17ae	553	for (ALL_LIST_ELEMENTS_RO(adjdb, node, adj)) {
	554	if (!adj) {
	555	zlog_warn("isis_adj_build_up_list(): NULL adj");
	556	return;
	557	}
f390d2c7	558
d62a17ae	559	if (adj->adj_state == ISIS_ADJ_UP)
	560	listnode_add(list, adj);
	561	}
	562
	563	return;
eb5d44eb	564	}
d8fba7d9	565
d62a17ae	566	int isis_adj_usage2levels(enum isis_adj_usage usage)
d8fba7d9	567	{
d62a17ae	568	switch (usage) {
	569	case ISIS_ADJ_LEVEL1:
	570	return IS_LEVEL_1;
	571	case ISIS_ADJ_LEVEL2:
	572	return IS_LEVEL_2;
	573	case ISIS_ADJ_LEVEL1AND2:
	574	return IS_LEVEL_1 \| IS_LEVEL_2;
	575	default:
	576	break;
	577	}
	578	return 0;
d8fba7d9	579	}