1*35277385Sclaudio /* $OpenBSD: neighbor.c,v 1.26 2005/12/15 20:29:06 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 { 120204df0f8Sclaudio int old_state; 121204df0f8Sclaudio int new_state = 0; 122204df0f8Sclaudio int i, ret = 0; 123204df0f8Sclaudio 124204df0f8Sclaudio if (nbr == nbr->iface->self) 125204df0f8Sclaudio return (0); 126204df0f8Sclaudio 127204df0f8Sclaudio old_state = nbr->state; 128204df0f8Sclaudio for (i = 0; nbr_fsm_tbl[i].state != -1; i++) 129204df0f8Sclaudio if ((nbr_fsm_tbl[i].state & old_state) && 130204df0f8Sclaudio (nbr_fsm_tbl[i].event == event)) { 131204df0f8Sclaudio new_state = nbr_fsm_tbl[i].new_state; 132204df0f8Sclaudio break; 133204df0f8Sclaudio } 134204df0f8Sclaudio 135204df0f8Sclaudio if (nbr_fsm_tbl[i].state == -1) { 136204df0f8Sclaudio /* XXX event outside of the defined fsm, ignore it. */ 137ddc378ebSclaudio log_warnx("nbr_fsm: neighbor ID %s, " 138204df0f8Sclaudio "event %s not expected in state %s", 139204df0f8Sclaudio inet_ntoa(nbr->id), nbr_event_name(event), 140204df0f8Sclaudio nbr_state_name(old_state)); 141204df0f8Sclaudio return (0); 142204df0f8Sclaudio } 143204df0f8Sclaudio 144204df0f8Sclaudio switch (nbr_fsm_tbl[i].action) { 145204df0f8Sclaudio case NBR_ACT_RST_ITIMER: 146204df0f8Sclaudio ret = nbr_act_reset_itimer(nbr); 147204df0f8Sclaudio break; 148204df0f8Sclaudio case NBR_ACT_STRT_ITIMER: 149204df0f8Sclaudio ret = nbr_act_start_itimer(nbr); 150204df0f8Sclaudio break; 151204df0f8Sclaudio case NBR_ACT_EVAL: 152204df0f8Sclaudio ret = nbr_act_eval(nbr); 153204df0f8Sclaudio break; 154204df0f8Sclaudio case NBR_ACT_SNAP: 155204df0f8Sclaudio ret = nbr_act_snapshot(nbr); 156204df0f8Sclaudio break; 157204df0f8Sclaudio case NBR_ACT_SNAP_DONE: 158204df0f8Sclaudio /* start db exchange */ 159204df0f8Sclaudio start_db_tx_timer(nbr); 160204df0f8Sclaudio break; 161204df0f8Sclaudio case NBR_ACT_XCHNG_DONE: 162204df0f8Sclaudio ret = nbr_act_exchange_done(nbr); 163204df0f8Sclaudio break; 164204df0f8Sclaudio case NBR_ACT_ADJ_OK: 165204df0f8Sclaudio ret = nbr_act_adj_ok(nbr); 166204df0f8Sclaudio break; 167204df0f8Sclaudio case NBR_ACT_RESTRT_DD: 168204df0f8Sclaudio ret = nbr_act_restart_dd(nbr); 169204df0f8Sclaudio break; 170204df0f8Sclaudio case NBR_ACT_DEL: 171204df0f8Sclaudio ret = nbr_act_delete(nbr); 172204df0f8Sclaudio break; 173204df0f8Sclaudio case NBR_ACT_CLR_LST: 174204df0f8Sclaudio ret = nbr_act_clear_lists(nbr); 175204df0f8Sclaudio break; 176204df0f8Sclaudio case NBR_ACT_HELLO_CHK: 177204df0f8Sclaudio ret = nbr_act_hello_check(nbr); 178204df0f8Sclaudio break; 179ddc378ebSclaudio case NBR_ACT_NOTHING: 180204df0f8Sclaudio /* do nothing */ 181204df0f8Sclaudio break; 182204df0f8Sclaudio } 183204df0f8Sclaudio 184204df0f8Sclaudio if (ret) { 185ddc378ebSclaudio log_warnx("nbr_fsm: error changing state for neighbor ID %s, " 186204df0f8Sclaudio "event %s, state %s", inet_ntoa(nbr->id), 187204df0f8Sclaudio nbr_event_name(event), nbr_state_name(old_state)); 188204df0f8Sclaudio return (-1); 189204df0f8Sclaudio } 190204df0f8Sclaudio 191204df0f8Sclaudio if (new_state != 0) 192204df0f8Sclaudio nbr->state = new_state; 193204df0f8Sclaudio 1940671d875Sclaudio if (old_state != nbr->state) { 1950671d875Sclaudio nbr->stats.sta_chng++; 19691cc1f69Sclaudio /* state change inform RDE */ 197204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_NEIGHBOR_CHANGE, 198204df0f8Sclaudio nbr->peerid, 0, &new_state, sizeof(new_state)); 199204df0f8Sclaudio 2000671d875Sclaudio if (old_state & NBR_STA_FULL || nbr->state & NBR_STA_FULL) { 2010671d875Sclaudio /* 2020671d875Sclaudio * neighbor changed from/to FULL 2030671d875Sclaudio * originate new rtr and net LSA 2040671d875Sclaudio */ 205317d560cSclaudio area_track(nbr->iface->area, nbr->state); 20691cc1f69Sclaudio orig_rtr_lsa(nbr->iface->area); 20791cc1f69Sclaudio if (nbr->iface->state & IF_STA_DR) 20891cc1f69Sclaudio orig_net_lsa(nbr->iface); 20991cc1f69Sclaudio } 21091cc1f69Sclaudio 2110671d875Sclaudio /* bidirectional communication lost */ 2120671d875Sclaudio if (old_state & ~NBR_STA_PRELIM && nbr->state & NBR_STA_PRELIM) 2130671d875Sclaudio if_fsm(nbr->iface, IF_EVT_NBR_CHNG); 2140671d875Sclaudio 215204df0f8Sclaudio log_debug("nbr_fsm: event %s resulted in action %s and " 216204df0f8Sclaudio "changing state for neighbor ID %s from %s to %s", 217204df0f8Sclaudio nbr_event_name(event), 218204df0f8Sclaudio nbr_action_name(nbr_fsm_tbl[i].action), 219204df0f8Sclaudio inet_ntoa(nbr->id), nbr_state_name(old_state), 220204df0f8Sclaudio nbr_state_name(nbr->state)); 22111a7e65fSnorby 22211a7e65fSnorby if (nbr->iface->type == IF_TYPE_VIRTUALLINK) { 22311a7e65fSnorby orig_rtr_lsa(nbr->iface->area); 22411a7e65fSnorby } 225204df0f8Sclaudio } 226204df0f8Sclaudio 227204df0f8Sclaudio return (ret); 228204df0f8Sclaudio } 229204df0f8Sclaudio 230204df0f8Sclaudio void 231204df0f8Sclaudio nbr_init(u_int32_t hashsize) 232204df0f8Sclaudio { 233e2993955Sclaudio struct nbr_head *head; 234e2993955Sclaudio struct nbr *nbr; 235204df0f8Sclaudio u_int32_t hs, i; 236204df0f8Sclaudio 237204df0f8Sclaudio for (hs = 1; hs < hashsize; hs <<= 1) 238204df0f8Sclaudio ; 239204df0f8Sclaudio nbrtable.hashtbl = calloc(hs, sizeof(struct nbr_head)); 240204df0f8Sclaudio if (nbrtable.hashtbl == NULL) 241204df0f8Sclaudio fatal("nbr_init"); 242204df0f8Sclaudio 243204df0f8Sclaudio for (i = 0; i < hs; i++) 244204df0f8Sclaudio LIST_INIT(&nbrtable.hashtbl[i]); 245204df0f8Sclaudio 246204df0f8Sclaudio nbrtable.hashmask = hs - 1; 247e2993955Sclaudio 248e2993955Sclaudio /* allocate a dummy neighbor used for self originated AS ext routes */ 249e2993955Sclaudio if ((nbr = calloc(1, sizeof(*nbr))) == NULL) 250e2993955Sclaudio fatal("nbr_init"); 251e2993955Sclaudio 252e2993955Sclaudio nbr->id.s_addr = ospfe_router_id(); 253e2993955Sclaudio nbr->state = NBR_STA_DOWN; 254e2993955Sclaudio nbr->peerid = NBR_IDSELF; 255e2993955Sclaudio head = NBR_HASH(nbr->peerid); 256e2993955Sclaudio LIST_INSERT_HEAD(head, nbr, hash); 257e2993955Sclaudio 258e2993955Sclaudio TAILQ_INIT(&nbr->ls_retrans_list); 259e2993955Sclaudio TAILQ_INIT(&nbr->db_sum_list); 260e2993955Sclaudio TAILQ_INIT(&nbr->ls_req_list); 261204df0f8Sclaudio } 262204df0f8Sclaudio 263204df0f8Sclaudio struct nbr * 264204df0f8Sclaudio nbr_new(u_int32_t nbr_id, struct iface *iface, int self) 265204df0f8Sclaudio { 266204df0f8Sclaudio struct nbr_head *head; 267e2993955Sclaudio struct nbr *nbr; 268204df0f8Sclaudio struct rde_nbr rn; 269204df0f8Sclaudio 270204df0f8Sclaudio if ((nbr = calloc(1, sizeof(*nbr))) == NULL) 271204df0f8Sclaudio fatal("nbr_new"); 272204df0f8Sclaudio 273204df0f8Sclaudio nbr->state = NBR_STA_DOWN; 2745c6e55e9Snorby nbr->master = 1; 275204df0f8Sclaudio nbr->dd_seq_num = arc4random(); /* RFC: some unique value */ 276204df0f8Sclaudio nbr->id.s_addr = nbr_id; 277204df0f8Sclaudio 278204df0f8Sclaudio /* get next unused peerid */ 279204df0f8Sclaudio while (nbr_find_peerid(++peercnt)) 280204df0f8Sclaudio ; 281204df0f8Sclaudio nbr->peerid = peercnt; 282204df0f8Sclaudio head = NBR_HASH(nbr->peerid); 283204df0f8Sclaudio LIST_INSERT_HEAD(head, nbr, hash); 284204df0f8Sclaudio 285204df0f8Sclaudio /* add to peer list */ 286204df0f8Sclaudio nbr->iface = iface; 287204df0f8Sclaudio LIST_INSERT_HEAD(&iface->nbr_list, nbr, entry); 288204df0f8Sclaudio 289204df0f8Sclaudio TAILQ_INIT(&nbr->ls_retrans_list); 290204df0f8Sclaudio TAILQ_INIT(&nbr->db_sum_list); 291204df0f8Sclaudio TAILQ_INIT(&nbr->ls_req_list); 292204df0f8Sclaudio 293204df0f8Sclaudio nbr->ls_req = NULL; 294204df0f8Sclaudio 295204df0f8Sclaudio if (self) { 296204df0f8Sclaudio nbr->state = NBR_STA_FULL; 297204df0f8Sclaudio nbr->addr.s_addr = iface->addr.s_addr; 298204df0f8Sclaudio nbr->priority = iface->priority; 299204df0f8Sclaudio } 300204df0f8Sclaudio 301204df0f8Sclaudio /* set event structures */ 302204df0f8Sclaudio evtimer_set(&nbr->inactivity_timer, nbr_itimer, nbr); 303204df0f8Sclaudio evtimer_set(&nbr->db_tx_timer, db_tx_timer, nbr); 304204df0f8Sclaudio evtimer_set(&nbr->lsreq_tx_timer, ls_req_tx_timer, nbr); 305cb75af8bSclaudio evtimer_set(&nbr->ls_retrans_timer, ls_retrans_timer, nbr); 306204df0f8Sclaudio evtimer_set(&nbr->adj_timer, nbr_adj_timer, nbr); 307204df0f8Sclaudio 308204df0f8Sclaudio bzero(&rn, sizeof(rn)); 309204df0f8Sclaudio rn.id.s_addr = nbr->id.s_addr; 310204df0f8Sclaudio rn.area_id.s_addr = nbr->iface->area->id.s_addr; 311204df0f8Sclaudio rn.state = nbr->state; 312204df0f8Sclaudio rn.self = self; 313204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_NEIGHBOR_UP, nbr->peerid, 0, &rn, 314204df0f8Sclaudio sizeof(rn)); 315204df0f8Sclaudio 316204df0f8Sclaudio return (nbr); 317204df0f8Sclaudio } 318204df0f8Sclaudio 319*35277385Sclaudio void 320204df0f8Sclaudio nbr_del(struct nbr *nbr) 321204df0f8Sclaudio { 322204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_NEIGHBOR_DOWN, nbr->peerid, 0, NULL, 0); 323204df0f8Sclaudio 324204df0f8Sclaudio /* clear lists */ 325204df0f8Sclaudio ls_retrans_list_clr(nbr); 326204df0f8Sclaudio db_sum_list_clr(nbr); 327204df0f8Sclaudio ls_req_list_clr(nbr); 328204df0f8Sclaudio 329204df0f8Sclaudio LIST_REMOVE(nbr, entry); 330204df0f8Sclaudio LIST_REMOVE(nbr, hash); 331204df0f8Sclaudio 332204df0f8Sclaudio free(nbr); 333204df0f8Sclaudio } 334204df0f8Sclaudio 335204df0f8Sclaudio struct nbr * 336204df0f8Sclaudio nbr_find_peerid(u_int32_t peerid) 337204df0f8Sclaudio { 338204df0f8Sclaudio struct nbr_head *head; 339204df0f8Sclaudio struct nbr *nbr; 340204df0f8Sclaudio 341204df0f8Sclaudio head = NBR_HASH(peerid); 342204df0f8Sclaudio 343204df0f8Sclaudio LIST_FOREACH(nbr, head, hash) { 344204df0f8Sclaudio if (nbr->peerid == peerid) 345204df0f8Sclaudio return (nbr); 346204df0f8Sclaudio } 347204df0f8Sclaudio 348204df0f8Sclaudio return (NULL); 349204df0f8Sclaudio } 350204df0f8Sclaudio 351204df0f8Sclaudio struct nbr * 352204df0f8Sclaudio nbr_find_id(struct iface *iface, u_int32_t rtr_id) 353204df0f8Sclaudio { 354204df0f8Sclaudio struct nbr *nbr = NULL; 355204df0f8Sclaudio 356204df0f8Sclaudio LIST_FOREACH(nbr, &iface->nbr_list, entry) { 357204df0f8Sclaudio if (nbr->id.s_addr == rtr_id) { 358204df0f8Sclaudio return (nbr); 359204df0f8Sclaudio } 360204df0f8Sclaudio } 361204df0f8Sclaudio 362204df0f8Sclaudio return (NULL); 363204df0f8Sclaudio } 364204df0f8Sclaudio 365204df0f8Sclaudio /* timers */ 366204df0f8Sclaudio void 367204df0f8Sclaudio nbr_itimer(int fd, short event, void *arg) 368204df0f8Sclaudio { 369204df0f8Sclaudio struct nbr *nbr = arg; 370204df0f8Sclaudio 37137cea71bSnorby if (nbr->state == NBR_STA_DOWN) { 37237cea71bSnorby nbr_del(nbr); 37337cea71bSnorby } else 374204df0f8Sclaudio nbr_fsm(nbr, NBR_EVT_ITIMER); 375204df0f8Sclaudio } 376204df0f8Sclaudio 377204df0f8Sclaudio int 378204df0f8Sclaudio nbr_start_itimer(struct nbr *nbr) 379204df0f8Sclaudio { 380204df0f8Sclaudio struct timeval tv; 381204df0f8Sclaudio 382204df0f8Sclaudio timerclear(&tv); 383204df0f8Sclaudio tv.tv_sec = nbr->iface->dead_interval; 384204df0f8Sclaudio 385204df0f8Sclaudio return (evtimer_add(&nbr->inactivity_timer, &tv)); 386204df0f8Sclaudio } 387204df0f8Sclaudio 388204df0f8Sclaudio int 389204df0f8Sclaudio nbr_stop_itimer(struct nbr *nbr) 390204df0f8Sclaudio { 391204df0f8Sclaudio return (evtimer_del(&nbr->inactivity_timer)); 392204df0f8Sclaudio } 393204df0f8Sclaudio 394204df0f8Sclaudio int 395204df0f8Sclaudio nbr_reset_itimer(struct nbr *nbr) 396204df0f8Sclaudio { 397204df0f8Sclaudio struct timeval tv; 398204df0f8Sclaudio 399204df0f8Sclaudio timerclear(&tv); 400204df0f8Sclaudio tv.tv_sec = nbr->iface->dead_interval; 401204df0f8Sclaudio 402204df0f8Sclaudio return (evtimer_add(&nbr->inactivity_timer, &tv)); 403204df0f8Sclaudio } 404204df0f8Sclaudio 405204df0f8Sclaudio void 406204df0f8Sclaudio nbr_adj_timer(int fd, short event, void *arg) 407204df0f8Sclaudio { 408204df0f8Sclaudio struct nbr *nbr = arg; 409204df0f8Sclaudio 410f71e573aSclaudio if (nbr->state & NBR_STA_ACTIVE && nbr->state != NBR_STA_FULL) { 411f74cc9a4Sclaudio log_warnx("nbr_adj_timer: failed to form adjacency with %s", 412f74cc9a4Sclaudio inet_ntoa(nbr->id)); 413204df0f8Sclaudio nbr_fsm(nbr, NBR_EVT_ADJTMOUT); 414204df0f8Sclaudio } 415204df0f8Sclaudio } 416204df0f8Sclaudio 417204df0f8Sclaudio int 418204df0f8Sclaudio nbr_start_adj_timer(struct nbr *nbr) 419204df0f8Sclaudio { 420204df0f8Sclaudio struct timeval tv; 421204df0f8Sclaudio 422204df0f8Sclaudio timerclear(&tv); 423204df0f8Sclaudio tv.tv_sec = DEFAULT_ADJ_TMOUT; 424204df0f8Sclaudio 425204df0f8Sclaudio return (evtimer_add(&nbr->adj_timer, &tv)); 426204df0f8Sclaudio } 427204df0f8Sclaudio 428204df0f8Sclaudio /* actions */ 429204df0f8Sclaudio int 430204df0f8Sclaudio nbr_act_reset_itimer(struct nbr *nbr) 431204df0f8Sclaudio { 432204df0f8Sclaudio if (nbr_reset_itimer(nbr)) { 433204df0f8Sclaudio log_warnx("nbr_act_reset_itimer: cannot schedule inactivity " 434204df0f8Sclaudio "timer, neighbor ID %s", inet_ntoa(nbr->id)); 435204df0f8Sclaudio return (-1); 436204df0f8Sclaudio } 437204df0f8Sclaudio 438204df0f8Sclaudio return (0); 439204df0f8Sclaudio } 440204df0f8Sclaudio 441204df0f8Sclaudio int 442204df0f8Sclaudio nbr_act_start_itimer(struct nbr *nbr) 443204df0f8Sclaudio { 444204df0f8Sclaudio if (nbr_start_itimer(nbr)) { 445204df0f8Sclaudio log_warnx("nbr_act_start_itimer: cannot schedule inactivity " 446204df0f8Sclaudio "timer, neighbor ID %s", 447204df0f8Sclaudio inet_ntoa(nbr->id)); 448204df0f8Sclaudio return (-1); 449204df0f8Sclaudio } 450204df0f8Sclaudio 451204df0f8Sclaudio return (0); 452204df0f8Sclaudio } 453204df0f8Sclaudio 454204df0f8Sclaudio int 455204df0f8Sclaudio nbr_adj_ok(struct nbr *nbr) 456204df0f8Sclaudio { 457204df0f8Sclaudio struct iface *iface = nbr->iface; 458204df0f8Sclaudio 459204df0f8Sclaudio switch (iface->type) { 460204df0f8Sclaudio case IF_TYPE_POINTOPOINT: 461204df0f8Sclaudio case IF_TYPE_VIRTUALLINK: 462204df0f8Sclaudio case IF_TYPE_POINTOMULTIPOINT: 4633e038149Snorby /* always ok */ 464204df0f8Sclaudio break; 465204df0f8Sclaudio case IF_TYPE_BROADCAST: 466204df0f8Sclaudio case IF_TYPE_NBMA: 467204df0f8Sclaudio /* 468204df0f8Sclaudio * if neighbor is dr, bdr or router self is dr or bdr 4699fe0edffSdavid * start forming adjacency 470204df0f8Sclaudio */ 471204df0f8Sclaudio if (iface->dr == nbr || iface->bdr == nbr || 472204df0f8Sclaudio iface->state & IF_STA_DRORBDR) 473204df0f8Sclaudio break; 474204df0f8Sclaudio return (0); 475204df0f8Sclaudio default: 476204df0f8Sclaudio fatalx("nbr_act_ok: unknown interface type"); 477204df0f8Sclaudio } 478204df0f8Sclaudio return (1); 479204df0f8Sclaudio } 480204df0f8Sclaudio 481204df0f8Sclaudio int 482204df0f8Sclaudio nbr_act_eval(struct nbr *nbr) 483204df0f8Sclaudio { 484204df0f8Sclaudio if (!nbr_adj_ok(nbr)) { 485204df0f8Sclaudio nbr->state = NBR_STA_2_WAY; 486204df0f8Sclaudio return (0); 487204df0f8Sclaudio } 488204df0f8Sclaudio 489204df0f8Sclaudio nbr->state = NBR_STA_XSTRT; 4905c6e55e9Snorby nbr->master = 1; 491204df0f8Sclaudio nbr->dd_seq_num++; /* as per RFC */ 492299d99d9Sclaudio nbr->dd_pending = 0; 493204df0f8Sclaudio /* initial db negotiation */ 494204df0f8Sclaudio start_db_tx_timer(nbr); 495204df0f8Sclaudio 496204df0f8Sclaudio return (0); 497204df0f8Sclaudio } 498204df0f8Sclaudio 499204df0f8Sclaudio int 500204df0f8Sclaudio nbr_act_snapshot(struct nbr *nbr) 501204df0f8Sclaudio { 502204df0f8Sclaudio stop_db_tx_timer(nbr); 503204df0f8Sclaudio nbr_start_adj_timer(nbr); 504204df0f8Sclaudio 505204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_DB_SNAPSHOT, nbr->peerid, 0, NULL, 0); 506204df0f8Sclaudio 507204df0f8Sclaudio return (0); 508204df0f8Sclaudio } 509204df0f8Sclaudio 510204df0f8Sclaudio int 511204df0f8Sclaudio nbr_act_exchange_done(struct nbr *nbr) 512204df0f8Sclaudio { 513204df0f8Sclaudio if (nbr->master) 514204df0f8Sclaudio stop_db_tx_timer(nbr); 515204df0f8Sclaudio 516299d99d9Sclaudio if (ls_req_list_empty(nbr) && nbr->state == NBR_STA_XCHNG && 517299d99d9Sclaudio nbr->dd_pending == 0) { 518204df0f8Sclaudio nbr->state = NBR_STA_FULL; 519204df0f8Sclaudio return (0); 520204df0f8Sclaudio } 521204df0f8Sclaudio 522204df0f8Sclaudio nbr->state = NBR_STA_LOAD; 523299d99d9Sclaudio 524299d99d9Sclaudio if (!ls_req_list_empty(nbr)) 525204df0f8Sclaudio start_ls_req_tx_timer(nbr); 526204df0f8Sclaudio 527204df0f8Sclaudio return (0); 528204df0f8Sclaudio } 529204df0f8Sclaudio 530204df0f8Sclaudio int 531204df0f8Sclaudio nbr_act_adj_ok(struct nbr *nbr) 532204df0f8Sclaudio { 533204df0f8Sclaudio if (nbr_adj_ok(nbr)) { 534204df0f8Sclaudio if (nbr->state == NBR_STA_2_WAY) 535204df0f8Sclaudio return (nbr_act_eval(nbr)); 536204df0f8Sclaudio } else { 537204df0f8Sclaudio nbr->state = NBR_STA_2_WAY; 538204df0f8Sclaudio return (nbr_act_clear_lists(nbr)); 539204df0f8Sclaudio } 540204df0f8Sclaudio 541204df0f8Sclaudio return (0); 542204df0f8Sclaudio } 543204df0f8Sclaudio 544204df0f8Sclaudio int 545204df0f8Sclaudio nbr_act_restart_dd(struct nbr *nbr) 546204df0f8Sclaudio { 5473922c68bSclaudio nbr_act_clear_lists(nbr); 5483922c68bSclaudio 5493922c68bSclaudio if (!nbr_adj_ok(nbr)) { 5503922c68bSclaudio nbr->state = NBR_STA_2_WAY; 5513922c68bSclaudio return (0); 5523922c68bSclaudio } 5533922c68bSclaudio 5543922c68bSclaudio nbr->state = NBR_STA_XSTRT; 5555c6e55e9Snorby nbr->master = 1; 556204df0f8Sclaudio nbr->dd_seq_num += arc4random() & 0xffff; 557299d99d9Sclaudio nbr->dd_pending = 0; 558204df0f8Sclaudio 5593922c68bSclaudio /* initial db negotiation */ 5603922c68bSclaudio start_db_tx_timer(nbr); 5613922c68bSclaudio 5623922c68bSclaudio return (0); 563204df0f8Sclaudio } 564204df0f8Sclaudio 565204df0f8Sclaudio int 566204df0f8Sclaudio nbr_act_delete(struct nbr *nbr) 567204df0f8Sclaudio { 56837cea71bSnorby struct timeval tv; 56937cea71bSnorby 570*35277385Sclaudio if (nbr == nbr->iface->self) 571*35277385Sclaudio return (0); 572*35277385Sclaudio 573204df0f8Sclaudio /* stop timers */ 574204df0f8Sclaudio if (nbr_stop_itimer(nbr)) { 575204df0f8Sclaudio log_warnx("nbr_act_delete: error removing inactivity timer, " 576204df0f8Sclaudio "neighbor ID %s", inet_ntoa(nbr->id)); 577204df0f8Sclaudio return (-1); 578204df0f8Sclaudio } 579204df0f8Sclaudio 580204df0f8Sclaudio /* clear dr and bdr */ 581204df0f8Sclaudio nbr->dr.s_addr = 0; 582204df0f8Sclaudio nbr->bdr.s_addr = 0; 583204df0f8Sclaudio 58403431b74Snorby nbr->crypt_seq_num = 0; 58503431b74Snorby 58637cea71bSnorby /* schedule kill timer */ 58737cea71bSnorby timerclear(&tv); 58837cea71bSnorby tv.tv_sec = DEFAULT_NBR_TMOUT; 58937cea71bSnorby 59037cea71bSnorby if (evtimer_add(&nbr->inactivity_timer, &tv)) { 59137cea71bSnorby log_warnx("nbr_act_delete: error scheduling neighbor ID %s " 59237cea71bSnorby "for removal", inet_ntoa(nbr->id)); 59337cea71bSnorby } 59437cea71bSnorby 595204df0f8Sclaudio return (nbr_act_clear_lists(nbr)); 596204df0f8Sclaudio } 597204df0f8Sclaudio 598204df0f8Sclaudio int 599204df0f8Sclaudio nbr_act_clear_lists(struct nbr *nbr) 600204df0f8Sclaudio { 601204df0f8Sclaudio if (stop_db_tx_timer(nbr)) { 602f74cc9a4Sclaudio log_warnx("nbr_act_clear_lists: error removing db_tx_timer, " 603204df0f8Sclaudio "neighbor ID %s", inet_ntoa(nbr->id)); 604204df0f8Sclaudio return (-1); 605204df0f8Sclaudio } 606204df0f8Sclaudio 607204df0f8Sclaudio if (stop_ls_req_tx_timer(nbr)) { 608f74cc9a4Sclaudio log_warnx("nbr_act_clear_lists: error removing lsreq_tx_timer, " 609204df0f8Sclaudio "neighbor ID %s", inet_ntoa(nbr->id)); 610204df0f8Sclaudio return (-1); 611204df0f8Sclaudio } 612204df0f8Sclaudio 613204df0f8Sclaudio /* clear lists */ 614204df0f8Sclaudio ls_retrans_list_clr(nbr); 615204df0f8Sclaudio db_sum_list_clr(nbr); 616204df0f8Sclaudio ls_req_list_clr(nbr); 617204df0f8Sclaudio 618204df0f8Sclaudio return (0); 619204df0f8Sclaudio } 620204df0f8Sclaudio 621204df0f8Sclaudio int 622204df0f8Sclaudio nbr_act_hello_check(struct nbr *nbr) 623204df0f8Sclaudio { 624204df0f8Sclaudio log_debug("nbr_act_hello_check: neighbor ID %s", inet_ntoa(nbr->id)); 625204df0f8Sclaudio 626204df0f8Sclaudio return (-1); 627204df0f8Sclaudio } 628204df0f8Sclaudio 629204df0f8Sclaudio struct ctl_nbr * 630204df0f8Sclaudio nbr_to_ctl(struct nbr *nbr) 631204df0f8Sclaudio { 632204df0f8Sclaudio static struct ctl_nbr nctl; 633204df0f8Sclaudio struct timeval tv, now, res; 634204df0f8Sclaudio struct lsa_entry *le; 635204df0f8Sclaudio 636204df0f8Sclaudio memcpy(nctl.name, nbr->iface->name, sizeof(nctl.name)); 637204df0f8Sclaudio memcpy(&nctl.id, &nbr->id, sizeof(nctl.id)); 638d13813cbSclaudio memcpy(&nctl.addr, &nbr->addr, sizeof(nctl.addr)); 639204df0f8Sclaudio memcpy(&nctl.dr, &nbr->dr, sizeof(nctl.dr)); 640204df0f8Sclaudio memcpy(&nctl.bdr, &nbr->bdr, sizeof(nctl.bdr)); 641204df0f8Sclaudio memcpy(&nctl.area, &nbr->iface->area->id, sizeof(nctl.area)); 642204df0f8Sclaudio 643204df0f8Sclaudio /* this list is 99% of the time empty so that's OK for now */ 644204df0f8Sclaudio nctl.db_sum_lst_cnt = 0; 645204df0f8Sclaudio TAILQ_FOREACH(le, &nbr->db_sum_list, entry) 646204df0f8Sclaudio nctl.db_sum_lst_cnt++; 647204df0f8Sclaudio 648204df0f8Sclaudio nctl.ls_req_lst_cnt = nbr->ls_req_cnt; 649204df0f8Sclaudio 650204df0f8Sclaudio /* XXX */ 651204df0f8Sclaudio nctl.ls_retrans_lst_cnt = 0; 652204df0f8Sclaudio TAILQ_FOREACH(le, &nbr->ls_retrans_list, entry) 653204df0f8Sclaudio nctl.ls_retrans_lst_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 686204df0f8Sclaudio return (&nctl); 687204df0f8Sclaudio } 688204df0f8Sclaudio 689204df0f8Sclaudio /* names */ 690204df0f8Sclaudio const char * 691204df0f8Sclaudio nbr_state_name(int state) 692204df0f8Sclaudio { 693204df0f8Sclaudio switch (state) { 694204df0f8Sclaudio case NBR_STA_DOWN: 695204df0f8Sclaudio return ("DOWN"); 696204df0f8Sclaudio case NBR_STA_ATTEMPT: 697204df0f8Sclaudio return ("ATTEMPT"); 698204df0f8Sclaudio case NBR_STA_INIT: 699204df0f8Sclaudio return ("INIT"); 700204df0f8Sclaudio case NBR_STA_2_WAY: 701204df0f8Sclaudio return ("2-WAY"); 702204df0f8Sclaudio case NBR_STA_XSTRT: 703204df0f8Sclaudio return ("EXSTART"); 704204df0f8Sclaudio case NBR_STA_SNAP: 705204df0f8Sclaudio return ("SNAPSHOT"); 706204df0f8Sclaudio case NBR_STA_XCHNG: 707204df0f8Sclaudio return ("EXCHANGE"); 708204df0f8Sclaudio case NBR_STA_LOAD: 709204df0f8Sclaudio return ("LOADING"); 710204df0f8Sclaudio case NBR_STA_FULL: 711204df0f8Sclaudio return ("FULL"); 712204df0f8Sclaudio default: 713204df0f8Sclaudio return ("UNKNOWN"); 714204df0f8Sclaudio } 715204df0f8Sclaudio } 716204df0f8Sclaudio 717204df0f8Sclaudio const char * 718204df0f8Sclaudio nbr_event_name(int event) 719204df0f8Sclaudio { 720204df0f8Sclaudio return (nbr_event_names[event]); 721204df0f8Sclaudio } 722204df0f8Sclaudio 723204df0f8Sclaudio const char * 724204df0f8Sclaudio nbr_action_name(int action) 725204df0f8Sclaudio { 726204df0f8Sclaudio return (nbr_action_names[action]); 727204df0f8Sclaudio } 728204df0f8Sclaudio 729204df0f8Sclaudio struct lsa_hdr * 730204df0f8Sclaudio lsa_hdr_new(void) 731204df0f8Sclaudio { 732204df0f8Sclaudio struct lsa_hdr *lsa_hdr = NULL; 733204df0f8Sclaudio 734204df0f8Sclaudio if ((lsa_hdr = calloc(1, sizeof(*lsa_hdr))) == NULL) 735204df0f8Sclaudio fatal("lsa_hdr_new"); 736204df0f8Sclaudio 737204df0f8Sclaudio return (lsa_hdr); 738204df0f8Sclaudio } 739