1*9aeb55b7Srenato /* $OpenBSD: adjacency.c,v 1.23 2016/06/09 17:26:32 renato Exp $ */ 276e3bd63Sclaudio 376e3bd63Sclaudio /* 45dc9330aSrenato * Copyright (c) 2013, 2015 Renato Westphal <renato@openbsd.org> 576e3bd63Sclaudio * Copyright (c) 2009 Michele Marchetto <michele@openbsd.org> 676e3bd63Sclaudio * Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org> 776e3bd63Sclaudio * Copyright (c) 2004, 2005, 2008 Esben Norby <norby@openbsd.org> 876e3bd63Sclaudio * 976e3bd63Sclaudio * Permission to use, copy, modify, and distribute this software for any 1076e3bd63Sclaudio * purpose with or without fee is hereby granted, provided that the above 1176e3bd63Sclaudio * copyright notice and this permission notice appear in all copies. 1276e3bd63Sclaudio * 1376e3bd63Sclaudio * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 1476e3bd63Sclaudio * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 1576e3bd63Sclaudio * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 1676e3bd63Sclaudio * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 1776e3bd63Sclaudio * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 1876e3bd63Sclaudio * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 1976e3bd63Sclaudio * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 2076e3bd63Sclaudio */ 2176e3bd63Sclaudio 2276e3bd63Sclaudio #include <sys/types.h> 2376e3bd63Sclaudio #include <arpa/inet.h> 2476e3bd63Sclaudio #include <stdlib.h> 2576e3bd63Sclaudio #include <string.h> 2676e3bd63Sclaudio 2776e3bd63Sclaudio #include "ldpd.h" 2876e3bd63Sclaudio #include "ldpe.h" 2976e3bd63Sclaudio #include "log.h" 3076e3bd63Sclaudio 31c28a25a1Srenato static void adj_itimer(int, short, void *); 32c28a25a1Srenato static void tnbr_del(struct tnbr *); 33c28a25a1Srenato static void tnbr_hello_timer(int, short, void *); 34c28a25a1Srenato static void tnbr_start_hello_timer(struct tnbr *); 35c28a25a1Srenato static void tnbr_stop_hello_timer(struct tnbr *); 3676e3bd63Sclaudio 3776e3bd63Sclaudio struct adj * 38a8c39dc0Srenato adj_new(struct in_addr lsr_id, struct hello_source *source, 39a8c39dc0Srenato union ldpd_addr *addr) 4076e3bd63Sclaudio { 4176e3bd63Sclaudio struct adj *adj; 4276e3bd63Sclaudio 43a8c39dc0Srenato log_debug("%s: lsr-id %s, %s", __func__, inet_ntoa(lsr_id), 4433f6ccfeSrenato log_hello_src(source)); 4576e3bd63Sclaudio 4676e3bd63Sclaudio if ((adj = calloc(1, sizeof(*adj))) == NULL) 47b7b4db73Srenato fatal(__func__); 4876e3bd63Sclaudio 49a8c39dc0Srenato adj->lsr_id = lsr_id; 50a8c39dc0Srenato adj->nbr = NULL; 517aa09c5dSrenato adj->source = *source; 52a8c39dc0Srenato adj->trans_addr = *addr; 5376e3bd63Sclaudio 5476e3bd63Sclaudio evtimer_set(&adj->inactivity_timer, adj_itimer, adj); 5576e3bd63Sclaudio 56a8c39dc0Srenato LIST_INSERT_HEAD(&global.adj_list, adj, global_entry); 5776e3bd63Sclaudio 5876e3bd63Sclaudio switch (source->type) { 5976e3bd63Sclaudio case HELLO_LINK: 60a8c39dc0Srenato LIST_INSERT_HEAD(&source->link.ia->adj_list, adj, ia_entry); 6176e3bd63Sclaudio break; 6276e3bd63Sclaudio case HELLO_TARGETED: 6376e3bd63Sclaudio source->target->adj = adj; 6476e3bd63Sclaudio break; 6576e3bd63Sclaudio } 6676e3bd63Sclaudio 6776e3bd63Sclaudio return (adj); 6876e3bd63Sclaudio } 6976e3bd63Sclaudio 7076e3bd63Sclaudio void 71*9aeb55b7Srenato adj_del(struct adj *adj, int send_notif, uint32_t notif_status) 7276e3bd63Sclaudio { 73a8c39dc0Srenato log_debug("%s: lsr-id %s, %s", __func__, inet_ntoa(adj->lsr_id), 7433f6ccfeSrenato log_hello_src(&adj->source)); 7576e3bd63Sclaudio 7676e3bd63Sclaudio adj_stop_itimer(adj); 7776e3bd63Sclaudio 78a8c39dc0Srenato LIST_REMOVE(adj, global_entry); 79a8c39dc0Srenato if (adj->nbr) 8076e3bd63Sclaudio LIST_REMOVE(adj, nbr_entry); 81ef2688d9Srenato if (adj->source.type == HELLO_LINK) 82a8c39dc0Srenato LIST_REMOVE(adj, ia_entry); 8376e3bd63Sclaudio 8476e3bd63Sclaudio /* last adjacency deleted */ 85*9aeb55b7Srenato if (adj->nbr && LIST_EMPTY(&adj->nbr->adj_list)) { 86*9aeb55b7Srenato if (send_notif) 87*9aeb55b7Srenato session_shutdown(adj->nbr, notif_status, 0, 0); 8876e3bd63Sclaudio nbr_del(adj->nbr); 89*9aeb55b7Srenato } 9076e3bd63Sclaudio 9176e3bd63Sclaudio free(adj); 9276e3bd63Sclaudio } 9376e3bd63Sclaudio 9476e3bd63Sclaudio struct adj * 95a8c39dc0Srenato adj_find(struct hello_source *source) 9676e3bd63Sclaudio { 9776e3bd63Sclaudio struct adj *adj; 9876e3bd63Sclaudio 99a8c39dc0Srenato LIST_FOREACH(adj, &global.adj_list, global_entry) { 10076e3bd63Sclaudio if (adj->source.type != source->type) 10176e3bd63Sclaudio continue; 10276e3bd63Sclaudio 10376e3bd63Sclaudio switch (source->type) { 10476e3bd63Sclaudio case HELLO_LINK: 105a8c39dc0Srenato if (ldp_addrcmp(source->link.ia->af, 106a8c39dc0Srenato &adj->source.link.src_addr, 107a8c39dc0Srenato &source->link.src_addr) == 0) 10876e3bd63Sclaudio return (adj); 10976e3bd63Sclaudio break; 11076e3bd63Sclaudio case HELLO_TARGETED: 11176e3bd63Sclaudio if (adj->source.target == source->target) 11276e3bd63Sclaudio return (adj); 11376e3bd63Sclaudio break; 11476e3bd63Sclaudio } 11576e3bd63Sclaudio } 11676e3bd63Sclaudio 11776e3bd63Sclaudio return (NULL); 11876e3bd63Sclaudio } 11976e3bd63Sclaudio 120a8c39dc0Srenato int 121a8c39dc0Srenato adj_get_af(struct adj *adj) 122a8c39dc0Srenato { 123a8c39dc0Srenato switch (adj->source.type) { 124a8c39dc0Srenato case HELLO_LINK: 125a8c39dc0Srenato return (adj->source.link.ia->af); 126a8c39dc0Srenato case HELLO_TARGETED: 127a8c39dc0Srenato return (adj->source.target->af); 128a8c39dc0Srenato default: 129a8c39dc0Srenato fatalx("adj_get_af: unknown hello type"); 130a8c39dc0Srenato } 131a8c39dc0Srenato } 132a8c39dc0Srenato 13376e3bd63Sclaudio /* adjacency timers */ 13476e3bd63Sclaudio 13576e3bd63Sclaudio /* ARGSUSED */ 136c28a25a1Srenato static void 13776e3bd63Sclaudio adj_itimer(int fd, short event, void *arg) 13876e3bd63Sclaudio { 13976e3bd63Sclaudio struct adj *adj = arg; 14076e3bd63Sclaudio 141a8c39dc0Srenato log_debug("%s: lsr-id %s", __func__, inet_ntoa(adj->lsr_id)); 14276e3bd63Sclaudio 143ef2688d9Srenato if (adj->source.type == HELLO_TARGETED) { 1446399cec1Srenato if (!(adj->source.target->flags & F_TNBR_CONFIGURED) && 1456399cec1Srenato adj->source.target->pw_count == 0) { 14699170248Srenato /* remove dynamic targeted neighbor */ 14776e3bd63Sclaudio tnbr_del(adj->source.target); 14899170248Srenato return; 14976e3bd63Sclaudio } 15099170248Srenato adj->source.target->adj = NULL; 15176e3bd63Sclaudio } 15276e3bd63Sclaudio 153*9aeb55b7Srenato adj_del(adj, 1, S_HOLDTIME_EXP); 15476e3bd63Sclaudio } 15576e3bd63Sclaudio 15676e3bd63Sclaudio void 15776e3bd63Sclaudio adj_start_itimer(struct adj *adj) 15876e3bd63Sclaudio { 15976e3bd63Sclaudio struct timeval tv; 16076e3bd63Sclaudio 16176e3bd63Sclaudio timerclear(&tv); 16276e3bd63Sclaudio tv.tv_sec = adj->holdtime; 16376e3bd63Sclaudio if (evtimer_add(&adj->inactivity_timer, &tv) == -1) 164b7b4db73Srenato fatal(__func__); 16576e3bd63Sclaudio } 16676e3bd63Sclaudio 16776e3bd63Sclaudio void 16876e3bd63Sclaudio adj_stop_itimer(struct adj *adj) 16976e3bd63Sclaudio { 17076e3bd63Sclaudio if (evtimer_pending(&adj->inactivity_timer, NULL) && 17176e3bd63Sclaudio evtimer_del(&adj->inactivity_timer) == -1) 172b7b4db73Srenato fatal(__func__); 17376e3bd63Sclaudio } 17476e3bd63Sclaudio 17576e3bd63Sclaudio /* targeted neighbors */ 17676e3bd63Sclaudio 17776e3bd63Sclaudio struct tnbr * 178a8c39dc0Srenato tnbr_new(struct ldpd_conf *xconf, int af, union ldpd_addr *addr) 17976e3bd63Sclaudio { 18076e3bd63Sclaudio struct tnbr *tnbr; 18176e3bd63Sclaudio 18276e3bd63Sclaudio if ((tnbr = calloc(1, sizeof(*tnbr))) == NULL) 183b7b4db73Srenato fatal(__func__); 18476e3bd63Sclaudio 185a8c39dc0Srenato tnbr->af = af; 186a8c39dc0Srenato tnbr->addr = *addr; 187b5921293Srenato tnbr->state = TNBR_STA_DOWN; 188a8c39dc0Srenato tnbr->hello_holdtime = (ldp_af_conf_get(xconf, af))->thello_holdtime; 189a8c39dc0Srenato tnbr->hello_interval = (ldp_af_conf_get(xconf, af))->thello_interval; 19076e3bd63Sclaudio 19176e3bd63Sclaudio return (tnbr); 19276e3bd63Sclaudio } 19376e3bd63Sclaudio 194c28a25a1Srenato static void 19576e3bd63Sclaudio tnbr_del(struct tnbr *tnbr) 19676e3bd63Sclaudio { 19776e3bd63Sclaudio tnbr_stop_hello_timer(tnbr); 19876e3bd63Sclaudio if (tnbr->adj) 199*9aeb55b7Srenato adj_del(tnbr->adj, 1, S_SHUTDOWN); 200ef2688d9Srenato LIST_REMOVE(tnbr, entry); 20176e3bd63Sclaudio free(tnbr); 20276e3bd63Sclaudio } 20376e3bd63Sclaudio 20499170248Srenato struct tnbr * 205a8c39dc0Srenato tnbr_find(struct ldpd_conf *xconf, int af, union ldpd_addr *addr) 20633f6ccfeSrenato { 20733f6ccfeSrenato struct tnbr *tnbr; 20833f6ccfeSrenato 20933f6ccfeSrenato LIST_FOREACH(tnbr, &xconf->tnbr_list, entry) 210a8c39dc0Srenato if (af == tnbr->af && 211a8c39dc0Srenato ldp_addrcmp(af, addr, &tnbr->addr) == 0) 21233f6ccfeSrenato return (tnbr); 21333f6ccfeSrenato 21433f6ccfeSrenato return (NULL); 21533f6ccfeSrenato } 21633f6ccfeSrenato 21733f6ccfeSrenato struct tnbr * 21899170248Srenato tnbr_check(struct tnbr *tnbr) 21999170248Srenato { 2206399cec1Srenato if (!(tnbr->flags & (F_TNBR_CONFIGURED|F_TNBR_DYNAMIC)) && 2216399cec1Srenato tnbr->pw_count == 0) { 22299170248Srenato tnbr_del(tnbr); 22399170248Srenato return (NULL); 22499170248Srenato } 22599170248Srenato 22699170248Srenato return (tnbr); 22799170248Srenato } 22899170248Srenato 22976e3bd63Sclaudio void 230b5921293Srenato tnbr_update(struct tnbr *tnbr) 23176e3bd63Sclaudio { 23208964f31Srenato int socket_ok, rtr_id_ok; 23376e3bd63Sclaudio 234a8c39dc0Srenato if ((ldp_af_global_get(&global, tnbr->af))->ldp_edisc_socket != -1) 235b5921293Srenato socket_ok = 1; 236b5921293Srenato else 237b5921293Srenato socket_ok = 0; 238b5921293Srenato 23908964f31Srenato if (leconf->rtr_id.s_addr != INADDR_ANY) 24008964f31Srenato rtr_id_ok = 1; 24108964f31Srenato else 24208964f31Srenato rtr_id_ok = 0; 24308964f31Srenato 244b5921293Srenato if (tnbr->state == TNBR_STA_DOWN) { 24508964f31Srenato if (!socket_ok || !rtr_id_ok) 246b5921293Srenato return; 247b5921293Srenato 248b5921293Srenato tnbr->state = TNBR_STA_ACTIVE; 2493de94509Srenato send_hello(HELLO_TARGETED, NULL, tnbr); 250b5921293Srenato 251b5921293Srenato evtimer_set(&tnbr->hello_timer, tnbr_hello_timer, tnbr); 25276e3bd63Sclaudio tnbr_start_hello_timer(tnbr); 253b5921293Srenato } else if (tnbr->state == TNBR_STA_ACTIVE) { 25408964f31Srenato if (socket_ok && rtr_id_ok) 255b5921293Srenato return; 256b5921293Srenato 257b5921293Srenato tnbr->state = TNBR_STA_DOWN; 258b5921293Srenato tnbr_stop_hello_timer(tnbr); 259b5921293Srenato } 260b5921293Srenato } 261b5921293Srenato 262b5921293Srenato void 263a8c39dc0Srenato tnbr_update_all(int af) 264b5921293Srenato { 265b5921293Srenato struct tnbr *tnbr; 266b5921293Srenato 267b5921293Srenato /* update targeted neighbors */ 268b5921293Srenato LIST_FOREACH(tnbr, &leconf->tnbr_list, entry) 269a8c39dc0Srenato if (tnbr->af == af || af == AF_UNSPEC) 270b5921293Srenato tnbr_update(tnbr); 27176e3bd63Sclaudio } 27276e3bd63Sclaudio 27376e3bd63Sclaudio /* target neighbors timers */ 27476e3bd63Sclaudio 27576e3bd63Sclaudio /* ARGSUSED */ 276c28a25a1Srenato static void 27776e3bd63Sclaudio tnbr_hello_timer(int fd, short event, void *arg) 27876e3bd63Sclaudio { 27976e3bd63Sclaudio struct tnbr *tnbr = arg; 28076e3bd63Sclaudio 28176e3bd63Sclaudio send_hello(HELLO_TARGETED, NULL, tnbr); 28222557577Srenato tnbr_start_hello_timer(tnbr); 28376e3bd63Sclaudio } 28476e3bd63Sclaudio 285c28a25a1Srenato static void 28676e3bd63Sclaudio tnbr_start_hello_timer(struct tnbr *tnbr) 28776e3bd63Sclaudio { 28876e3bd63Sclaudio struct timeval tv; 28976e3bd63Sclaudio 29076e3bd63Sclaudio timerclear(&tv); 29176e3bd63Sclaudio tv.tv_sec = tnbr->hello_interval; 29276e3bd63Sclaudio if (evtimer_add(&tnbr->hello_timer, &tv) == -1) 293b7b4db73Srenato fatal(__func__); 29476e3bd63Sclaudio } 29576e3bd63Sclaudio 296c28a25a1Srenato static void 29776e3bd63Sclaudio tnbr_stop_hello_timer(struct tnbr *tnbr) 29876e3bd63Sclaudio { 29976e3bd63Sclaudio if (evtimer_pending(&tnbr->hello_timer, NULL) && 30076e3bd63Sclaudio evtimer_del(&tnbr->hello_timer) == -1) 301b7b4db73Srenato fatal(__func__); 30276e3bd63Sclaudio } 30376e3bd63Sclaudio 30476e3bd63Sclaudio struct ctl_adj * 30576e3bd63Sclaudio adj_to_ctl(struct adj *adj) 30676e3bd63Sclaudio { 30776e3bd63Sclaudio static struct ctl_adj actl; 30876e3bd63Sclaudio 309a8c39dc0Srenato actl.af = adj_get_af(adj); 310a8c39dc0Srenato actl.id = adj->lsr_id; 31176e3bd63Sclaudio actl.type = adj->source.type; 31276e3bd63Sclaudio switch (adj->source.type) { 31376e3bd63Sclaudio case HELLO_LINK: 314a8c39dc0Srenato memcpy(actl.ifname, adj->source.link.ia->iface->name, 31576e3bd63Sclaudio sizeof(actl.ifname)); 31676e3bd63Sclaudio break; 31776e3bd63Sclaudio case HELLO_TARGETED: 3187aa09c5dSrenato actl.src_addr = adj->source.target->addr; 31976e3bd63Sclaudio break; 32076e3bd63Sclaudio } 32176e3bd63Sclaudio actl.holdtime = adj->holdtime; 322a8c39dc0Srenato actl.trans_addr = adj->trans_addr; 32376e3bd63Sclaudio 32476e3bd63Sclaudio return (&actl); 32576e3bd63Sclaudio } 326