1*a302a2ceSclaudio /* $OpenBSD: neighbor.c,v 1.34 2007/01/24 14:08:28 claudio Exp $ */ 2204df0f8Sclaudio 3204df0f8Sclaudio /* 4204df0f8Sclaudio * Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org> 5367f601bSnorby * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org> 6204df0f8Sclaudio * 7204df0f8Sclaudio * Permission to use, copy, modify, and distribute this software for any 8204df0f8Sclaudio * purpose with or without fee is hereby granted, provided that the above 9204df0f8Sclaudio * copyright notice and this permission notice appear in all copies. 10204df0f8Sclaudio * 11204df0f8Sclaudio * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12204df0f8Sclaudio * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13204df0f8Sclaudio * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14204df0f8Sclaudio * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15204df0f8Sclaudio * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16204df0f8Sclaudio * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17204df0f8Sclaudio * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18204df0f8Sclaudio */ 19204df0f8Sclaudio 20204df0f8Sclaudio #include <sys/types.h> 21204df0f8Sclaudio #include <sys/ioctl.h> 22204df0f8Sclaudio #include <sys/time.h> 23204df0f8Sclaudio #include <sys/socket.h> 24204df0f8Sclaudio #include <netinet/in.h> 25204df0f8Sclaudio #include <arpa/inet.h> 26204df0f8Sclaudio #include <net/if.h> 27204df0f8Sclaudio 28204df0f8Sclaudio #include <ctype.h> 29204df0f8Sclaudio #include <err.h> 30204df0f8Sclaudio #include <stdio.h> 31204df0f8Sclaudio #include <stdlib.h> 32204df0f8Sclaudio #include <string.h> 33204df0f8Sclaudio #include <event.h> 34204df0f8Sclaudio 35204df0f8Sclaudio #include "ospfd.h" 36204df0f8Sclaudio #include "ospf.h" 37204df0f8Sclaudio #include "ospfe.h" 38204df0f8Sclaudio #include "log.h" 39204df0f8Sclaudio #include "rde.h" 40204df0f8Sclaudio 41204df0f8Sclaudio int nbr_adj_ok(struct nbr *); 42204df0f8Sclaudio 43204df0f8Sclaudio LIST_HEAD(nbr_head, nbr); 44204df0f8Sclaudio 45204df0f8Sclaudio struct nbr_table { 46204df0f8Sclaudio struct nbr_head *hashtbl; 47204df0f8Sclaudio u_int32_t hashmask; 48204df0f8Sclaudio } nbrtable; 49204df0f8Sclaudio 50204df0f8Sclaudio #define NBR_HASH(x) \ 51204df0f8Sclaudio &nbrtable.hashtbl[(x) & nbrtable.hashmask] 52204df0f8Sclaudio 53e2993955Sclaudio u_int32_t peercnt = NBR_CNTSTART; 54204df0f8Sclaudio 55204df0f8Sclaudio struct { 56204df0f8Sclaudio int state; 57204df0f8Sclaudio enum nbr_event event; 58204df0f8Sclaudio enum nbr_action action; 59204df0f8Sclaudio int new_state; 60204df0f8Sclaudio } nbr_fsm_tbl[] = { 61204df0f8Sclaudio /* current state event that happened action to take resulting state */ 62204df0f8Sclaudio {NBR_STA_ACTIVE, NBR_EVT_HELLO_RCVD, NBR_ACT_RST_ITIMER, 0}, 63ddc378ebSclaudio {NBR_STA_BIDIR, NBR_EVT_2_WAY_RCVD, NBR_ACT_NOTHING, 0}, 64ddc378ebSclaudio {NBR_STA_INIT, NBR_EVT_1_WAY_RCVD, NBR_ACT_NOTHING, 0}, 65204df0f8Sclaudio {NBR_STA_DOWN, NBR_EVT_HELLO_RCVD, NBR_ACT_STRT_ITIMER, NBR_STA_INIT}, 66204df0f8Sclaudio {NBR_STA_ATTEMPT, NBR_EVT_HELLO_RCVD, NBR_ACT_RST_ITIMER, NBR_STA_INIT}, 67204df0f8Sclaudio {NBR_STA_INIT, NBR_EVT_2_WAY_RCVD, NBR_ACT_EVAL, 0}, 68204df0f8Sclaudio {NBR_STA_XSTRT, NBR_EVT_NEG_DONE, NBR_ACT_SNAP, NBR_STA_SNAP}, 69204df0f8Sclaudio {NBR_STA_SNAP, NBR_EVT_SNAP_DONE, NBR_ACT_SNAP_DONE, NBR_STA_XCHNG}, 70204df0f8Sclaudio {NBR_STA_XCHNG, NBR_EVT_XCHNG_DONE, NBR_ACT_XCHNG_DONE, 0}, 71ddc378ebSclaudio {NBR_STA_LOAD, NBR_EVT_LOAD_DONE, NBR_ACT_NOTHING, NBR_STA_FULL}, 72204df0f8Sclaudio {NBR_STA_2_WAY, NBR_EVT_ADJ_OK, NBR_ACT_EVAL, 0}, 73204df0f8Sclaudio {NBR_STA_ADJFORM, NBR_EVT_ADJ_OK, NBR_ACT_ADJ_OK, 0}, 74204df0f8Sclaudio {NBR_STA_PRELIM, NBR_EVT_ADJ_OK, NBR_ACT_HELLO_CHK, 0}, 753922c68bSclaudio {NBR_STA_ADJFORM, NBR_EVT_ADJTMOUT, NBR_ACT_RESTRT_DD, 0}, 76204df0f8Sclaudio {NBR_STA_FLOOD, NBR_EVT_SEQ_NUM_MIS, NBR_ACT_RESTRT_DD, NBR_STA_XSTRT}, 77204df0f8Sclaudio {NBR_STA_FLOOD, NBR_EVT_BAD_LS_REQ, NBR_ACT_RESTRT_DD, NBR_STA_XSTRT}, 78204df0f8Sclaudio {NBR_STA_ANY, NBR_EVT_KILL_NBR, NBR_ACT_DEL, NBR_STA_DOWN}, 79204df0f8Sclaudio {NBR_STA_ANY, NBR_EVT_LL_DOWN, NBR_ACT_DEL, NBR_STA_DOWN}, 80204df0f8Sclaudio {NBR_STA_ANY, NBR_EVT_ITIMER, NBR_ACT_DEL, NBR_STA_DOWN}, 81204df0f8Sclaudio {NBR_STA_BIDIR, NBR_EVT_1_WAY_RCVD, NBR_ACT_CLR_LST, NBR_STA_INIT}, 82ddc378ebSclaudio {-1, NBR_EVT_NOTHING, NBR_ACT_NOTHING, 0}, 83204df0f8Sclaudio }; 84204df0f8Sclaudio 85204df0f8Sclaudio const char * const nbr_event_names[] = { 86204df0f8Sclaudio "NOTHING", 87204df0f8Sclaudio "HELLO_RECEIVED", 88204df0f8Sclaudio "2_WAY_RECEIVED", 89204df0f8Sclaudio "NEGOTIATION_DONE", 90204df0f8Sclaudio "SNAPSHOT_DONE", 91204df0f8Sclaudio "EXCHANGE_DONE", 92204df0f8Sclaudio "BAD_LS_REQ", 93204df0f8Sclaudio "LOADING_DONE", 94204df0f8Sclaudio "ADJ_OK", 95204df0f8Sclaudio "SEQ_NUM_MISMATCH", 96204df0f8Sclaudio "1_WAY_RECEIVED", 97204df0f8Sclaudio "KILL_NBR", 98204df0f8Sclaudio "INACTIVITY_TIMER", 99204df0f8Sclaudio "LL_DOWN", 100204df0f8Sclaudio "ADJ_TIMEOUT" 101204df0f8Sclaudio }; 102204df0f8Sclaudio 103204df0f8Sclaudio const char * const nbr_action_names[] = { 104204df0f8Sclaudio "NOTHING", 105204df0f8Sclaudio "RESET_INACTIVITY_TIMER", 106204df0f8Sclaudio "START_INACTIVITY_TIMER", 107204df0f8Sclaudio "EVAL", 108204df0f8Sclaudio "SNAPSHOT", 109204df0f8Sclaudio "SNAPSHOT_DONE", 110204df0f8Sclaudio "EXCHANGE_DONE", 111204df0f8Sclaudio "ADJ_OK", 112204df0f8Sclaudio "RESET_DD", 113204df0f8Sclaudio "DELETE", 114204df0f8Sclaudio "CLEAR_LISTS" 115204df0f8Sclaudio }; 116204df0f8Sclaudio 117204df0f8Sclaudio int 118204df0f8Sclaudio nbr_fsm(struct nbr *nbr, enum nbr_event event) 119204df0f8Sclaudio { 120129e6b5fSnorby struct timeval now; 121204df0f8Sclaudio int old_state; 122204df0f8Sclaudio int new_state = 0; 123204df0f8Sclaudio int i, ret = 0; 124204df0f8Sclaudio 125204df0f8Sclaudio if (nbr == nbr->iface->self) 126204df0f8Sclaudio return (0); 127204df0f8Sclaudio 128204df0f8Sclaudio old_state = nbr->state; 129204df0f8Sclaudio for (i = 0; nbr_fsm_tbl[i].state != -1; i++) 130204df0f8Sclaudio if ((nbr_fsm_tbl[i].state & old_state) && 131204df0f8Sclaudio (nbr_fsm_tbl[i].event == event)) { 132204df0f8Sclaudio new_state = nbr_fsm_tbl[i].new_state; 133204df0f8Sclaudio break; 134204df0f8Sclaudio } 135204df0f8Sclaudio 136204df0f8Sclaudio if (nbr_fsm_tbl[i].state == -1) { 137fff6fedaSclaudio /* event outside of the defined fsm, ignore it. */ 138ddc378ebSclaudio log_warnx("nbr_fsm: neighbor ID %s, " 139204df0f8Sclaudio "event %s not expected in state %s", 140cdd38203Sclaudio inet_ntoa(nbr->id), nbr_event_names[event], 141204df0f8Sclaudio nbr_state_name(old_state)); 142204df0f8Sclaudio return (0); 143204df0f8Sclaudio } 144204df0f8Sclaudio 145204df0f8Sclaudio switch (nbr_fsm_tbl[i].action) { 146204df0f8Sclaudio case NBR_ACT_RST_ITIMER: 147204df0f8Sclaudio ret = nbr_act_reset_itimer(nbr); 148204df0f8Sclaudio break; 149204df0f8Sclaudio case NBR_ACT_STRT_ITIMER: 150204df0f8Sclaudio ret = nbr_act_start_itimer(nbr); 151204df0f8Sclaudio break; 152204df0f8Sclaudio case NBR_ACT_EVAL: 153204df0f8Sclaudio ret = nbr_act_eval(nbr); 154204df0f8Sclaudio break; 155204df0f8Sclaudio case NBR_ACT_SNAP: 156204df0f8Sclaudio ret = nbr_act_snapshot(nbr); 157204df0f8Sclaudio break; 158204df0f8Sclaudio case NBR_ACT_SNAP_DONE: 159204df0f8Sclaudio /* start db exchange */ 160204df0f8Sclaudio start_db_tx_timer(nbr); 161204df0f8Sclaudio break; 162204df0f8Sclaudio case NBR_ACT_XCHNG_DONE: 163204df0f8Sclaudio ret = nbr_act_exchange_done(nbr); 164204df0f8Sclaudio break; 165204df0f8Sclaudio case NBR_ACT_ADJ_OK: 166204df0f8Sclaudio ret = nbr_act_adj_ok(nbr); 167204df0f8Sclaudio break; 168204df0f8Sclaudio case NBR_ACT_RESTRT_DD: 169204df0f8Sclaudio ret = nbr_act_restart_dd(nbr); 170204df0f8Sclaudio break; 171204df0f8Sclaudio case NBR_ACT_DEL: 172204df0f8Sclaudio ret = nbr_act_delete(nbr); 173204df0f8Sclaudio break; 174204df0f8Sclaudio case NBR_ACT_CLR_LST: 175204df0f8Sclaudio ret = nbr_act_clear_lists(nbr); 176204df0f8Sclaudio break; 177204df0f8Sclaudio case NBR_ACT_HELLO_CHK: 178204df0f8Sclaudio ret = nbr_act_hello_check(nbr); 179204df0f8Sclaudio break; 180ddc378ebSclaudio case NBR_ACT_NOTHING: 181204df0f8Sclaudio /* do nothing */ 182204df0f8Sclaudio break; 183204df0f8Sclaudio } 184204df0f8Sclaudio 185204df0f8Sclaudio if (ret) { 186ddc378ebSclaudio log_warnx("nbr_fsm: error changing state for neighbor ID %s, " 187204df0f8Sclaudio "event %s, state %s", inet_ntoa(nbr->id), 188cdd38203Sclaudio nbr_event_names[event], nbr_state_name(old_state)); 189204df0f8Sclaudio return (-1); 190204df0f8Sclaudio } 191204df0f8Sclaudio 192204df0f8Sclaudio if (new_state != 0) 193204df0f8Sclaudio nbr->state = new_state; 194204df0f8Sclaudio 1950671d875Sclaudio if (old_state != nbr->state) { 1960671d875Sclaudio nbr->stats.sta_chng++; 19791cc1f69Sclaudio /* state change inform RDE */ 198204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_NEIGHBOR_CHANGE, 199204df0f8Sclaudio nbr->peerid, 0, &new_state, sizeof(new_state)); 200204df0f8Sclaudio 2010671d875Sclaudio if (old_state & NBR_STA_FULL || nbr->state & NBR_STA_FULL) { 2020671d875Sclaudio /* 2030671d875Sclaudio * neighbor changed from/to FULL 2040671d875Sclaudio * originate new rtr and net LSA 2050671d875Sclaudio */ 206317d560cSclaudio area_track(nbr->iface->area, nbr->state); 20791cc1f69Sclaudio orig_rtr_lsa(nbr->iface->area); 20891cc1f69Sclaudio if (nbr->iface->state & IF_STA_DR) 20991cc1f69Sclaudio orig_net_lsa(nbr->iface); 210129e6b5fSnorby 211129e6b5fSnorby gettimeofday(&now, NULL); 212129e6b5fSnorby nbr->uptime = now.tv_sec; 21391cc1f69Sclaudio } 21491cc1f69Sclaudio 2150671d875Sclaudio /* bidirectional communication lost */ 2160671d875Sclaudio if (old_state & ~NBR_STA_PRELIM && nbr->state & NBR_STA_PRELIM) 2170671d875Sclaudio if_fsm(nbr->iface, IF_EVT_NBR_CHNG); 2180671d875Sclaudio 219204df0f8Sclaudio log_debug("nbr_fsm: event %s resulted in action %s and " 220204df0f8Sclaudio "changing state for neighbor ID %s from %s to %s", 221cdd38203Sclaudio nbr_event_names[event], 222cdd38203Sclaudio nbr_action_names[nbr_fsm_tbl[i].action], 223204df0f8Sclaudio inet_ntoa(nbr->id), nbr_state_name(old_state), 224204df0f8Sclaudio nbr_state_name(nbr->state)); 22511a7e65fSnorby 22611a7e65fSnorby if (nbr->iface->type == IF_TYPE_VIRTUALLINK) { 22711a7e65fSnorby orig_rtr_lsa(nbr->iface->area); 22811a7e65fSnorby } 229204df0f8Sclaudio } 230204df0f8Sclaudio 231204df0f8Sclaudio return (ret); 232204df0f8Sclaudio } 233204df0f8Sclaudio 234204df0f8Sclaudio void 235204df0f8Sclaudio nbr_init(u_int32_t hashsize) 236204df0f8Sclaudio { 237e2993955Sclaudio struct nbr_head *head; 238e2993955Sclaudio struct nbr *nbr; 239204df0f8Sclaudio u_int32_t hs, i; 240204df0f8Sclaudio 241204df0f8Sclaudio for (hs = 1; hs < hashsize; hs <<= 1) 242204df0f8Sclaudio ; 243204df0f8Sclaudio nbrtable.hashtbl = calloc(hs, sizeof(struct nbr_head)); 244204df0f8Sclaudio if (nbrtable.hashtbl == NULL) 245204df0f8Sclaudio fatal("nbr_init"); 246204df0f8Sclaudio 247204df0f8Sclaudio for (i = 0; i < hs; i++) 248204df0f8Sclaudio LIST_INIT(&nbrtable.hashtbl[i]); 249204df0f8Sclaudio 250204df0f8Sclaudio nbrtable.hashmask = hs - 1; 251e2993955Sclaudio 252e2993955Sclaudio /* allocate a dummy neighbor used for self originated AS ext routes */ 253e2993955Sclaudio if ((nbr = calloc(1, sizeof(*nbr))) == NULL) 254e2993955Sclaudio fatal("nbr_init"); 255e2993955Sclaudio 256e2993955Sclaudio nbr->id.s_addr = ospfe_router_id(); 257e2993955Sclaudio nbr->state = NBR_STA_DOWN; 258e2993955Sclaudio nbr->peerid = NBR_IDSELF; 259e2993955Sclaudio head = NBR_HASH(nbr->peerid); 260e2993955Sclaudio LIST_INSERT_HEAD(head, nbr, hash); 261e2993955Sclaudio 262e2993955Sclaudio TAILQ_INIT(&nbr->ls_retrans_list); 263e2993955Sclaudio TAILQ_INIT(&nbr->db_sum_list); 264e2993955Sclaudio TAILQ_INIT(&nbr->ls_req_list); 265204df0f8Sclaudio } 266204df0f8Sclaudio 267204df0f8Sclaudio struct nbr * 268204df0f8Sclaudio nbr_new(u_int32_t nbr_id, struct iface *iface, int self) 269204df0f8Sclaudio { 270204df0f8Sclaudio struct nbr_head *head; 271e2993955Sclaudio struct nbr *nbr; 272204df0f8Sclaudio struct rde_nbr rn; 273204df0f8Sclaudio 274204df0f8Sclaudio if ((nbr = calloc(1, sizeof(*nbr))) == NULL) 275204df0f8Sclaudio fatal("nbr_new"); 276204df0f8Sclaudio 277204df0f8Sclaudio nbr->state = NBR_STA_DOWN; 2785c6e55e9Snorby nbr->master = 1; 279204df0f8Sclaudio nbr->dd_seq_num = arc4random(); /* RFC: some unique value */ 280204df0f8Sclaudio nbr->id.s_addr = nbr_id; 281204df0f8Sclaudio 282204df0f8Sclaudio /* get next unused peerid */ 283204df0f8Sclaudio while (nbr_find_peerid(++peercnt)) 284204df0f8Sclaudio ; 285204df0f8Sclaudio nbr->peerid = peercnt; 286204df0f8Sclaudio head = NBR_HASH(nbr->peerid); 287204df0f8Sclaudio LIST_INSERT_HEAD(head, nbr, hash); 288204df0f8Sclaudio 289204df0f8Sclaudio /* add to peer list */ 290204df0f8Sclaudio nbr->iface = iface; 291204df0f8Sclaudio LIST_INSERT_HEAD(&iface->nbr_list, nbr, entry); 292204df0f8Sclaudio 293204df0f8Sclaudio TAILQ_INIT(&nbr->ls_retrans_list); 294204df0f8Sclaudio TAILQ_INIT(&nbr->db_sum_list); 295204df0f8Sclaudio TAILQ_INIT(&nbr->ls_req_list); 296204df0f8Sclaudio 297204df0f8Sclaudio nbr->ls_req = NULL; 298204df0f8Sclaudio 299204df0f8Sclaudio if (self) { 300204df0f8Sclaudio nbr->state = NBR_STA_FULL; 301204df0f8Sclaudio nbr->addr.s_addr = iface->addr.s_addr; 302204df0f8Sclaudio nbr->priority = iface->priority; 303204df0f8Sclaudio } 304204df0f8Sclaudio 305204df0f8Sclaudio /* set event structures */ 306204df0f8Sclaudio evtimer_set(&nbr->inactivity_timer, nbr_itimer, nbr); 307204df0f8Sclaudio evtimer_set(&nbr->db_tx_timer, db_tx_timer, nbr); 308204df0f8Sclaudio evtimer_set(&nbr->lsreq_tx_timer, ls_req_tx_timer, nbr); 309cb75af8bSclaudio evtimer_set(&nbr->ls_retrans_timer, ls_retrans_timer, nbr); 310204df0f8Sclaudio evtimer_set(&nbr->adj_timer, nbr_adj_timer, nbr); 311204df0f8Sclaudio 312204df0f8Sclaudio bzero(&rn, sizeof(rn)); 313204df0f8Sclaudio rn.id.s_addr = nbr->id.s_addr; 314204df0f8Sclaudio rn.area_id.s_addr = nbr->iface->area->id.s_addr; 315204df0f8Sclaudio rn.state = nbr->state; 316204df0f8Sclaudio rn.self = self; 317204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_NEIGHBOR_UP, nbr->peerid, 0, &rn, 318204df0f8Sclaudio sizeof(rn)); 319204df0f8Sclaudio 320204df0f8Sclaudio return (nbr); 321204df0f8Sclaudio } 322204df0f8Sclaudio 32335277385Sclaudio void 324204df0f8Sclaudio nbr_del(struct nbr *nbr) 325204df0f8Sclaudio { 326204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_NEIGHBOR_DOWN, nbr->peerid, 0, NULL, 0); 327204df0f8Sclaudio 328*a302a2ceSclaudio if (evtimer_pending(&nbr->inactivity_timer, NULL)) 329*a302a2ceSclaudio evtimer_del(&nbr->inactivity_timer); 330*a302a2ceSclaudio if (evtimer_pending(&nbr->db_tx_timer, NULL)) 331*a302a2ceSclaudio evtimer_del(&nbr->db_tx_timer); 332*a302a2ceSclaudio if (evtimer_pending(&nbr->lsreq_tx_timer, NULL)) 333*a302a2ceSclaudio evtimer_del(&nbr->lsreq_tx_timer); 334*a302a2ceSclaudio if (evtimer_pending(&nbr->ls_retrans_timer, NULL)) 335*a302a2ceSclaudio evtimer_del(&nbr->ls_retrans_timer); 336*a302a2ceSclaudio if (evtimer_pending(&nbr->adj_timer, NULL)) 337*a302a2ceSclaudio evtimer_del(&nbr->adj_timer); 338*a302a2ceSclaudio 339204df0f8Sclaudio /* clear lists */ 340204df0f8Sclaudio ls_retrans_list_clr(nbr); 341204df0f8Sclaudio db_sum_list_clr(nbr); 342204df0f8Sclaudio ls_req_list_clr(nbr); 343204df0f8Sclaudio 344204df0f8Sclaudio LIST_REMOVE(nbr, entry); 345204df0f8Sclaudio LIST_REMOVE(nbr, hash); 346204df0f8Sclaudio 347204df0f8Sclaudio free(nbr); 348204df0f8Sclaudio } 349204df0f8Sclaudio 350204df0f8Sclaudio struct nbr * 351204df0f8Sclaudio nbr_find_peerid(u_int32_t peerid) 352204df0f8Sclaudio { 353204df0f8Sclaudio struct nbr_head *head; 354204df0f8Sclaudio struct nbr *nbr; 355204df0f8Sclaudio 356204df0f8Sclaudio head = NBR_HASH(peerid); 357204df0f8Sclaudio 358204df0f8Sclaudio LIST_FOREACH(nbr, head, hash) { 359204df0f8Sclaudio if (nbr->peerid == peerid) 360204df0f8Sclaudio return (nbr); 361204df0f8Sclaudio } 362204df0f8Sclaudio 363204df0f8Sclaudio return (NULL); 364204df0f8Sclaudio } 365204df0f8Sclaudio 366204df0f8Sclaudio struct nbr * 367204df0f8Sclaudio nbr_find_id(struct iface *iface, u_int32_t rtr_id) 368204df0f8Sclaudio { 369204df0f8Sclaudio struct nbr *nbr = NULL; 370204df0f8Sclaudio 371204df0f8Sclaudio LIST_FOREACH(nbr, &iface->nbr_list, entry) { 3723aede346Sclaudio if (nbr->id.s_addr == rtr_id) 373204df0f8Sclaudio return (nbr); 374204df0f8Sclaudio } 375204df0f8Sclaudio 376204df0f8Sclaudio return (NULL); 377204df0f8Sclaudio } 378204df0f8Sclaudio 379204df0f8Sclaudio /* timers */ 3803aede346Sclaudio /* ARGSUSED */ 381204df0f8Sclaudio void 382204df0f8Sclaudio nbr_itimer(int fd, short event, void *arg) 383204df0f8Sclaudio { 384204df0f8Sclaudio struct nbr *nbr = arg; 385204df0f8Sclaudio 3863aede346Sclaudio if (nbr->state == NBR_STA_DOWN) 38737cea71bSnorby nbr_del(nbr); 3883aede346Sclaudio else 389204df0f8Sclaudio nbr_fsm(nbr, NBR_EVT_ITIMER); 390204df0f8Sclaudio } 391204df0f8Sclaudio 3923aede346Sclaudio void 393204df0f8Sclaudio nbr_start_itimer(struct nbr *nbr) 394204df0f8Sclaudio { 395204df0f8Sclaudio struct timeval tv; 396204df0f8Sclaudio 397204df0f8Sclaudio timerclear(&tv); 398204df0f8Sclaudio tv.tv_sec = nbr->iface->dead_interval; 399204df0f8Sclaudio 4003aede346Sclaudio if (evtimer_add(&nbr->inactivity_timer, &tv) == -1) 4013aede346Sclaudio fatal("nbr_start_itimer"); 402204df0f8Sclaudio } 403204df0f8Sclaudio 4043aede346Sclaudio void 405204df0f8Sclaudio nbr_stop_itimer(struct nbr *nbr) 406204df0f8Sclaudio { 4073aede346Sclaudio if (evtimer_del(&nbr->inactivity_timer) == -1) 4083aede346Sclaudio fatal("nbr_stop_itimer"); 409204df0f8Sclaudio } 410204df0f8Sclaudio 4113aede346Sclaudio void 412204df0f8Sclaudio nbr_reset_itimer(struct nbr *nbr) 413204df0f8Sclaudio { 414204df0f8Sclaudio struct timeval tv; 415204df0f8Sclaudio 416204df0f8Sclaudio timerclear(&tv); 417204df0f8Sclaudio tv.tv_sec = nbr->iface->dead_interval; 418204df0f8Sclaudio 4193aede346Sclaudio if (evtimer_add(&nbr->inactivity_timer, &tv) == -1) 4203aede346Sclaudio fatal("nbr_reset_itimer"); 421204df0f8Sclaudio } 422204df0f8Sclaudio 4233aede346Sclaudio /* ARGSUSED */ 424204df0f8Sclaudio void 425204df0f8Sclaudio nbr_adj_timer(int fd, short event, void *arg) 426204df0f8Sclaudio { 427204df0f8Sclaudio struct nbr *nbr = arg; 428204df0f8Sclaudio 429718e8ec2Snorby if (nbr->state == NBR_STA_2_WAY) 430718e8ec2Snorby return ; 431718e8ec2Snorby 432f71e573aSclaudio if (nbr->state & NBR_STA_ACTIVE && nbr->state != NBR_STA_FULL) { 433f74cc9a4Sclaudio log_warnx("nbr_adj_timer: failed to form adjacency with %s", 434f74cc9a4Sclaudio inet_ntoa(nbr->id)); 435204df0f8Sclaudio nbr_fsm(nbr, NBR_EVT_ADJTMOUT); 436204df0f8Sclaudio } 437204df0f8Sclaudio } 438204df0f8Sclaudio 4393aede346Sclaudio void 440204df0f8Sclaudio nbr_start_adj_timer(struct nbr *nbr) 441204df0f8Sclaudio { 442204df0f8Sclaudio struct timeval tv; 443204df0f8Sclaudio 444204df0f8Sclaudio timerclear(&tv); 445204df0f8Sclaudio tv.tv_sec = DEFAULT_ADJ_TMOUT; 446204df0f8Sclaudio 4473aede346Sclaudio if (evtimer_add(&nbr->adj_timer, &tv) == -1) 4483aede346Sclaudio fatal("nbr_start_adj_timer"); 449204df0f8Sclaudio } 450204df0f8Sclaudio 451204df0f8Sclaudio /* actions */ 452204df0f8Sclaudio int 453204df0f8Sclaudio nbr_act_reset_itimer(struct nbr *nbr) 454204df0f8Sclaudio { 4553aede346Sclaudio nbr_reset_itimer(nbr); 456204df0f8Sclaudio 457204df0f8Sclaudio return (0); 458204df0f8Sclaudio } 459204df0f8Sclaudio 460204df0f8Sclaudio int 461204df0f8Sclaudio nbr_act_start_itimer(struct nbr *nbr) 462204df0f8Sclaudio { 4633aede346Sclaudio nbr_start_itimer(nbr); 464204df0f8Sclaudio 465204df0f8Sclaudio return (0); 466204df0f8Sclaudio } 467204df0f8Sclaudio 468204df0f8Sclaudio int 469204df0f8Sclaudio nbr_adj_ok(struct nbr *nbr) 470204df0f8Sclaudio { 471204df0f8Sclaudio struct iface *iface = nbr->iface; 472204df0f8Sclaudio 473204df0f8Sclaudio switch (iface->type) { 474204df0f8Sclaudio case IF_TYPE_POINTOPOINT: 475204df0f8Sclaudio case IF_TYPE_VIRTUALLINK: 476204df0f8Sclaudio case IF_TYPE_POINTOMULTIPOINT: 4773e038149Snorby /* always ok */ 478204df0f8Sclaudio break; 479204df0f8Sclaudio case IF_TYPE_BROADCAST: 480204df0f8Sclaudio case IF_TYPE_NBMA: 481204df0f8Sclaudio /* 482204df0f8Sclaudio * if neighbor is dr, bdr or router self is dr or bdr 4839fe0edffSdavid * start forming adjacency 484204df0f8Sclaudio */ 485204df0f8Sclaudio if (iface->dr == nbr || iface->bdr == nbr || 486204df0f8Sclaudio iface->state & IF_STA_DRORBDR) 487204df0f8Sclaudio break; 488204df0f8Sclaudio return (0); 489204df0f8Sclaudio default: 490204df0f8Sclaudio fatalx("nbr_act_ok: unknown interface type"); 491204df0f8Sclaudio } 492204df0f8Sclaudio return (1); 493204df0f8Sclaudio } 494204df0f8Sclaudio 495204df0f8Sclaudio int 496204df0f8Sclaudio nbr_act_eval(struct nbr *nbr) 497204df0f8Sclaudio { 498204df0f8Sclaudio if (!nbr_adj_ok(nbr)) { 499204df0f8Sclaudio nbr->state = NBR_STA_2_WAY; 500204df0f8Sclaudio return (0); 501204df0f8Sclaudio } 502204df0f8Sclaudio 503204df0f8Sclaudio nbr->state = NBR_STA_XSTRT; 5045c6e55e9Snorby nbr->master = 1; 505204df0f8Sclaudio nbr->dd_seq_num++; /* as per RFC */ 506299d99d9Sclaudio nbr->dd_pending = 0; 507204df0f8Sclaudio /* initial db negotiation */ 508204df0f8Sclaudio start_db_tx_timer(nbr); 509204df0f8Sclaudio 5101ccc5a96Snorby nbr_start_adj_timer(nbr); 5111ccc5a96Snorby 512204df0f8Sclaudio return (0); 513204df0f8Sclaudio } 514204df0f8Sclaudio 515204df0f8Sclaudio int 516204df0f8Sclaudio nbr_act_snapshot(struct nbr *nbr) 517204df0f8Sclaudio { 518204df0f8Sclaudio stop_db_tx_timer(nbr); 519204df0f8Sclaudio 520204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_DB_SNAPSHOT, nbr->peerid, 0, NULL, 0); 521204df0f8Sclaudio 522204df0f8Sclaudio return (0); 523204df0f8Sclaudio } 524204df0f8Sclaudio 525204df0f8Sclaudio int 526204df0f8Sclaudio nbr_act_exchange_done(struct nbr *nbr) 527204df0f8Sclaudio { 528204df0f8Sclaudio if (nbr->master) 529204df0f8Sclaudio stop_db_tx_timer(nbr); 530204df0f8Sclaudio 531299d99d9Sclaudio if (ls_req_list_empty(nbr) && nbr->state == NBR_STA_XCHNG && 532299d99d9Sclaudio nbr->dd_pending == 0) { 533204df0f8Sclaudio nbr->state = NBR_STA_FULL; 534204df0f8Sclaudio return (0); 535204df0f8Sclaudio } 536204df0f8Sclaudio 537204df0f8Sclaudio nbr->state = NBR_STA_LOAD; 538299d99d9Sclaudio 539299d99d9Sclaudio if (!ls_req_list_empty(nbr)) 540204df0f8Sclaudio start_ls_req_tx_timer(nbr); 541204df0f8Sclaudio 542204df0f8Sclaudio return (0); 543204df0f8Sclaudio } 544204df0f8Sclaudio 545204df0f8Sclaudio int 546204df0f8Sclaudio nbr_act_adj_ok(struct nbr *nbr) 547204df0f8Sclaudio { 548204df0f8Sclaudio if (nbr_adj_ok(nbr)) { 549204df0f8Sclaudio if (nbr->state == NBR_STA_2_WAY) 550204df0f8Sclaudio return (nbr_act_eval(nbr)); 551204df0f8Sclaudio } else { 552204df0f8Sclaudio nbr->state = NBR_STA_2_WAY; 553204df0f8Sclaudio return (nbr_act_clear_lists(nbr)); 554204df0f8Sclaudio } 555204df0f8Sclaudio 556204df0f8Sclaudio return (0); 557204df0f8Sclaudio } 558204df0f8Sclaudio 559204df0f8Sclaudio int 560204df0f8Sclaudio nbr_act_restart_dd(struct nbr *nbr) 561204df0f8Sclaudio { 5623922c68bSclaudio nbr_act_clear_lists(nbr); 5633922c68bSclaudio 5643922c68bSclaudio if (!nbr_adj_ok(nbr)) { 5653922c68bSclaudio nbr->state = NBR_STA_2_WAY; 5663922c68bSclaudio return (0); 5673922c68bSclaudio } 5683922c68bSclaudio 5693922c68bSclaudio nbr->state = NBR_STA_XSTRT; 5705c6e55e9Snorby nbr->master = 1; 571204df0f8Sclaudio nbr->dd_seq_num += arc4random() & 0xffff; 572299d99d9Sclaudio nbr->dd_pending = 0; 573204df0f8Sclaudio 5743922c68bSclaudio /* initial db negotiation */ 5753922c68bSclaudio start_db_tx_timer(nbr); 5763922c68bSclaudio 5771ccc5a96Snorby nbr_start_adj_timer(nbr); 5781ccc5a96Snorby 5793922c68bSclaudio return (0); 580204df0f8Sclaudio } 581204df0f8Sclaudio 582204df0f8Sclaudio int 583204df0f8Sclaudio nbr_act_delete(struct nbr *nbr) 584204df0f8Sclaudio { 58537cea71bSnorby struct timeval tv; 58637cea71bSnorby 58735277385Sclaudio if (nbr == nbr->iface->self) 58835277385Sclaudio return (0); 58935277385Sclaudio 590204df0f8Sclaudio /* stop timers */ 5913aede346Sclaudio nbr_stop_itimer(nbr); 592204df0f8Sclaudio 593204df0f8Sclaudio /* clear dr and bdr */ 594204df0f8Sclaudio nbr->dr.s_addr = 0; 595204df0f8Sclaudio nbr->bdr.s_addr = 0; 59603431b74Snorby nbr->crypt_seq_num = 0; 59703431b74Snorby 59837cea71bSnorby /* schedule kill timer */ 59937cea71bSnorby timerclear(&tv); 60037cea71bSnorby tv.tv_sec = DEFAULT_NBR_TMOUT; 60137cea71bSnorby 60237cea71bSnorby if (evtimer_add(&nbr->inactivity_timer, &tv)) { 60337cea71bSnorby log_warnx("nbr_act_delete: error scheduling neighbor ID %s " 60437cea71bSnorby "for removal", inet_ntoa(nbr->id)); 60537cea71bSnorby } 60637cea71bSnorby 607204df0f8Sclaudio return (nbr_act_clear_lists(nbr)); 608204df0f8Sclaudio } 609204df0f8Sclaudio 610204df0f8Sclaudio int 611204df0f8Sclaudio nbr_act_clear_lists(struct nbr *nbr) 612204df0f8Sclaudio { 6133aede346Sclaudio /* stop timers */ 6143aede346Sclaudio stop_db_tx_timer(nbr); 6153aede346Sclaudio stop_ls_req_tx_timer(nbr); 616204df0f8Sclaudio 617204df0f8Sclaudio /* clear lists */ 618204df0f8Sclaudio ls_retrans_list_clr(nbr); 619204df0f8Sclaudio db_sum_list_clr(nbr); 620204df0f8Sclaudio ls_req_list_clr(nbr); 621204df0f8Sclaudio 622204df0f8Sclaudio return (0); 623204df0f8Sclaudio } 624204df0f8Sclaudio 625204df0f8Sclaudio int 626204df0f8Sclaudio nbr_act_hello_check(struct nbr *nbr) 627204df0f8Sclaudio { 628204df0f8Sclaudio log_debug("nbr_act_hello_check: neighbor ID %s", inet_ntoa(nbr->id)); 629204df0f8Sclaudio 630204df0f8Sclaudio return (-1); 631204df0f8Sclaudio } 632204df0f8Sclaudio 633204df0f8Sclaudio struct ctl_nbr * 634204df0f8Sclaudio nbr_to_ctl(struct nbr *nbr) 635204df0f8Sclaudio { 636204df0f8Sclaudio static struct ctl_nbr nctl; 637204df0f8Sclaudio struct timeval tv, now, res; 638204df0f8Sclaudio struct lsa_entry *le; 639204df0f8Sclaudio 640204df0f8Sclaudio memcpy(nctl.name, nbr->iface->name, sizeof(nctl.name)); 641204df0f8Sclaudio memcpy(&nctl.id, &nbr->id, sizeof(nctl.id)); 642d13813cbSclaudio memcpy(&nctl.addr, &nbr->addr, sizeof(nctl.addr)); 643204df0f8Sclaudio memcpy(&nctl.dr, &nbr->dr, sizeof(nctl.dr)); 644204df0f8Sclaudio memcpy(&nctl.bdr, &nbr->bdr, sizeof(nctl.bdr)); 645204df0f8Sclaudio memcpy(&nctl.area, &nbr->iface->area->id, sizeof(nctl.area)); 646204df0f8Sclaudio 647204df0f8Sclaudio /* this list is 99% of the time empty so that's OK for now */ 648204df0f8Sclaudio nctl.db_sum_lst_cnt = 0; 649204df0f8Sclaudio TAILQ_FOREACH(le, &nbr->db_sum_list, entry) 650204df0f8Sclaudio nctl.db_sum_lst_cnt++; 651204df0f8Sclaudio 652204df0f8Sclaudio nctl.ls_req_lst_cnt = nbr->ls_req_cnt; 6531ba81fefSnorby nctl.ls_retrans_lst_cnt = nbr->ls_ret_cnt; 654204df0f8Sclaudio 655204df0f8Sclaudio nctl.nbr_state = nbr->state; 656944ca59cSclaudio 657944ca59cSclaudio /* 658944ca59cSclaudio * We need to trick a bit to show the remote iface state. 659944ca59cSclaudio * The idea is to print DR, BDR or DROther dependent on 660944ca59cSclaudio * the type of the neighbor. 661944ca59cSclaudio */ 662944ca59cSclaudio if (nbr->iface->dr == nbr) 663944ca59cSclaudio nctl.iface_state = IF_STA_DR; 664944ca59cSclaudio else if (nbr->iface->bdr == nbr) 665944ca59cSclaudio nctl.iface_state = IF_STA_BACKUP; 666944ca59cSclaudio else if (nbr->iface->state & IF_STA_MULTI) 667944ca59cSclaudio nctl.iface_state = IF_STA_DROTHER; 668944ca59cSclaudio else 669204df0f8Sclaudio nctl.iface_state = nbr->iface->state; 670204df0f8Sclaudio 671204df0f8Sclaudio nctl.state_chng_cnt = nbr->stats.sta_chng; 672204df0f8Sclaudio 673204df0f8Sclaudio nctl.priority = nbr->priority; 674204df0f8Sclaudio nctl.options = nbr->options; 675204df0f8Sclaudio 676204df0f8Sclaudio gettimeofday(&now, NULL); 677204df0f8Sclaudio if (evtimer_pending(&nbr->inactivity_timer, &tv)) { 678204df0f8Sclaudio timersub(&tv, &now, &res); 679c843cd3cSclaudio if (nbr->state & NBR_STA_DOWN) 680c843cd3cSclaudio nctl.dead_timer = DEFAULT_NBR_TMOUT - res.tv_sec; 681c843cd3cSclaudio else 682204df0f8Sclaudio nctl.dead_timer = res.tv_sec; 683204df0f8Sclaudio } else 684204df0f8Sclaudio nctl.dead_timer = 0; 685204df0f8Sclaudio 686129e6b5fSnorby if (nbr->state == NBR_STA_FULL) { 687129e6b5fSnorby nctl.uptime = now.tv_sec - nbr->uptime; 688129e6b5fSnorby } else 689129e6b5fSnorby nctl.uptime = 0; 690129e6b5fSnorby 691204df0f8Sclaudio return (&nctl); 692204df0f8Sclaudio } 693204df0f8Sclaudio 694204df0f8Sclaudio struct lsa_hdr * 695204df0f8Sclaudio lsa_hdr_new(void) 696204df0f8Sclaudio { 697204df0f8Sclaudio struct lsa_hdr *lsa_hdr = NULL; 698204df0f8Sclaudio 699204df0f8Sclaudio if ((lsa_hdr = calloc(1, sizeof(*lsa_hdr))) == NULL) 700204df0f8Sclaudio fatal("lsa_hdr_new"); 701204df0f8Sclaudio 702204df0f8Sclaudio return (lsa_hdr); 703204df0f8Sclaudio } 704