1*98c612a2Snorby /* $OpenBSD: neighbor.c,v 1.37 2008/02/11 12:37:37 norby 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", 114a26af33fSclaudio "CLEAR_LISTS", 115a26af33fSclaudio "HELLO_CHK" 116204df0f8Sclaudio }; 117204df0f8Sclaudio 118204df0f8Sclaudio int 119204df0f8Sclaudio nbr_fsm(struct nbr *nbr, enum nbr_event event) 120204df0f8Sclaudio { 121129e6b5fSnorby struct timeval now; 122204df0f8Sclaudio int old_state; 123204df0f8Sclaudio int new_state = 0; 124204df0f8Sclaudio int i, ret = 0; 125204df0f8Sclaudio 126204df0f8Sclaudio if (nbr == nbr->iface->self) 127204df0f8Sclaudio return (0); 128204df0f8Sclaudio 129204df0f8Sclaudio old_state = nbr->state; 130204df0f8Sclaudio for (i = 0; nbr_fsm_tbl[i].state != -1; i++) 131204df0f8Sclaudio if ((nbr_fsm_tbl[i].state & old_state) && 132204df0f8Sclaudio (nbr_fsm_tbl[i].event == event)) { 133204df0f8Sclaudio new_state = nbr_fsm_tbl[i].new_state; 134204df0f8Sclaudio break; 135204df0f8Sclaudio } 136204df0f8Sclaudio 137204df0f8Sclaudio if (nbr_fsm_tbl[i].state == -1) { 138fff6fedaSclaudio /* event outside of the defined fsm, ignore it. */ 139ddc378ebSclaudio log_warnx("nbr_fsm: neighbor ID %s, " 140204df0f8Sclaudio "event %s not expected in state %s", 141cdd38203Sclaudio inet_ntoa(nbr->id), nbr_event_names[event], 142204df0f8Sclaudio nbr_state_name(old_state)); 143204df0f8Sclaudio return (0); 144204df0f8Sclaudio } 145204df0f8Sclaudio 146204df0f8Sclaudio switch (nbr_fsm_tbl[i].action) { 147204df0f8Sclaudio case NBR_ACT_RST_ITIMER: 148204df0f8Sclaudio ret = nbr_act_reset_itimer(nbr); 149204df0f8Sclaudio break; 150204df0f8Sclaudio case NBR_ACT_STRT_ITIMER: 151204df0f8Sclaudio ret = nbr_act_start_itimer(nbr); 152204df0f8Sclaudio break; 153204df0f8Sclaudio case NBR_ACT_EVAL: 154204df0f8Sclaudio ret = nbr_act_eval(nbr); 155204df0f8Sclaudio break; 156204df0f8Sclaudio case NBR_ACT_SNAP: 157204df0f8Sclaudio ret = nbr_act_snapshot(nbr); 158204df0f8Sclaudio break; 159204df0f8Sclaudio case NBR_ACT_SNAP_DONE: 160204df0f8Sclaudio /* start db exchange */ 161204df0f8Sclaudio start_db_tx_timer(nbr); 162204df0f8Sclaudio break; 163204df0f8Sclaudio case NBR_ACT_XCHNG_DONE: 164204df0f8Sclaudio ret = nbr_act_exchange_done(nbr); 165204df0f8Sclaudio break; 166204df0f8Sclaudio case NBR_ACT_ADJ_OK: 167204df0f8Sclaudio ret = nbr_act_adj_ok(nbr); 168204df0f8Sclaudio break; 169204df0f8Sclaudio case NBR_ACT_RESTRT_DD: 170204df0f8Sclaudio ret = nbr_act_restart_dd(nbr); 171204df0f8Sclaudio break; 172204df0f8Sclaudio case NBR_ACT_DEL: 173204df0f8Sclaudio ret = nbr_act_delete(nbr); 174204df0f8Sclaudio break; 175204df0f8Sclaudio case NBR_ACT_CLR_LST: 176204df0f8Sclaudio ret = nbr_act_clear_lists(nbr); 177204df0f8Sclaudio break; 178204df0f8Sclaudio case NBR_ACT_HELLO_CHK: 179204df0f8Sclaudio ret = nbr_act_hello_check(nbr); 180204df0f8Sclaudio break; 181ddc378ebSclaudio case NBR_ACT_NOTHING: 182204df0f8Sclaudio /* do nothing */ 183204df0f8Sclaudio break; 184204df0f8Sclaudio } 185204df0f8Sclaudio 186204df0f8Sclaudio if (ret) { 187ddc378ebSclaudio log_warnx("nbr_fsm: error changing state for neighbor ID %s, " 188204df0f8Sclaudio "event %s, state %s", inet_ntoa(nbr->id), 189cdd38203Sclaudio nbr_event_names[event], nbr_state_name(old_state)); 190204df0f8Sclaudio return (-1); 191204df0f8Sclaudio } 192204df0f8Sclaudio 193204df0f8Sclaudio if (new_state != 0) 194204df0f8Sclaudio nbr->state = new_state; 195204df0f8Sclaudio 1960671d875Sclaudio if (old_state != nbr->state) { 1970671d875Sclaudio nbr->stats.sta_chng++; 19891cc1f69Sclaudio /* state change inform RDE */ 199204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_NEIGHBOR_CHANGE, 200204df0f8Sclaudio nbr->peerid, 0, &new_state, sizeof(new_state)); 201204df0f8Sclaudio 2020671d875Sclaudio if (old_state & NBR_STA_FULL || nbr->state & NBR_STA_FULL) { 2030671d875Sclaudio /* 2040671d875Sclaudio * neighbor changed from/to FULL 2050671d875Sclaudio * originate new rtr and net LSA 2060671d875Sclaudio */ 207317d560cSclaudio area_track(nbr->iface->area, nbr->state); 20891cc1f69Sclaudio orig_rtr_lsa(nbr->iface->area); 20991cc1f69Sclaudio if (nbr->iface->state & IF_STA_DR) 21091cc1f69Sclaudio orig_net_lsa(nbr->iface); 211129e6b5fSnorby 212129e6b5fSnorby gettimeofday(&now, NULL); 213129e6b5fSnorby nbr->uptime = now.tv_sec; 21491cc1f69Sclaudio } 21591cc1f69Sclaudio 2160671d875Sclaudio /* bidirectional communication lost */ 2170671d875Sclaudio if (old_state & ~NBR_STA_PRELIM && nbr->state & NBR_STA_PRELIM) 2180671d875Sclaudio if_fsm(nbr->iface, IF_EVT_NBR_CHNG); 2190671d875Sclaudio 220204df0f8Sclaudio log_debug("nbr_fsm: event %s resulted in action %s and " 221204df0f8Sclaudio "changing state for neighbor ID %s from %s to %s", 222cdd38203Sclaudio nbr_event_names[event], 223cdd38203Sclaudio nbr_action_names[nbr_fsm_tbl[i].action], 224204df0f8Sclaudio inet_ntoa(nbr->id), nbr_state_name(old_state), 225204df0f8Sclaudio nbr_state_name(nbr->state)); 22611a7e65fSnorby 22711a7e65fSnorby if (nbr->iface->type == IF_TYPE_VIRTUALLINK) { 22811a7e65fSnorby orig_rtr_lsa(nbr->iface->area); 22911a7e65fSnorby } 230204df0f8Sclaudio } 231204df0f8Sclaudio 232204df0f8Sclaudio return (ret); 233204df0f8Sclaudio } 234204df0f8Sclaudio 235204df0f8Sclaudio void 236204df0f8Sclaudio nbr_init(u_int32_t hashsize) 237204df0f8Sclaudio { 238e2993955Sclaudio struct nbr_head *head; 239e2993955Sclaudio struct nbr *nbr; 240204df0f8Sclaudio u_int32_t hs, i; 241204df0f8Sclaudio 242204df0f8Sclaudio for (hs = 1; hs < hashsize; hs <<= 1) 243204df0f8Sclaudio ; 244204df0f8Sclaudio nbrtable.hashtbl = calloc(hs, sizeof(struct nbr_head)); 245204df0f8Sclaudio if (nbrtable.hashtbl == NULL) 246204df0f8Sclaudio fatal("nbr_init"); 247204df0f8Sclaudio 248204df0f8Sclaudio for (i = 0; i < hs; i++) 249204df0f8Sclaudio LIST_INIT(&nbrtable.hashtbl[i]); 250204df0f8Sclaudio 251204df0f8Sclaudio nbrtable.hashmask = hs - 1; 252e2993955Sclaudio 253e2993955Sclaudio /* allocate a dummy neighbor used for self originated AS ext routes */ 254e2993955Sclaudio if ((nbr = calloc(1, sizeof(*nbr))) == NULL) 255e2993955Sclaudio fatal("nbr_init"); 256e2993955Sclaudio 257e2993955Sclaudio nbr->id.s_addr = ospfe_router_id(); 258e2993955Sclaudio nbr->state = NBR_STA_DOWN; 259e2993955Sclaudio nbr->peerid = NBR_IDSELF; 260e2993955Sclaudio head = NBR_HASH(nbr->peerid); 261e2993955Sclaudio LIST_INSERT_HEAD(head, nbr, hash); 262e2993955Sclaudio 263e2993955Sclaudio TAILQ_INIT(&nbr->ls_retrans_list); 264e2993955Sclaudio TAILQ_INIT(&nbr->db_sum_list); 265e2993955Sclaudio TAILQ_INIT(&nbr->ls_req_list); 266204df0f8Sclaudio } 267204df0f8Sclaudio 268204df0f8Sclaudio struct nbr * 269204df0f8Sclaudio nbr_new(u_int32_t nbr_id, struct iface *iface, int self) 270204df0f8Sclaudio { 271204df0f8Sclaudio struct nbr_head *head; 272e2993955Sclaudio struct nbr *nbr; 273204df0f8Sclaudio struct rde_nbr rn; 274204df0f8Sclaudio 275204df0f8Sclaudio if ((nbr = calloc(1, sizeof(*nbr))) == NULL) 276204df0f8Sclaudio fatal("nbr_new"); 277204df0f8Sclaudio 278204df0f8Sclaudio nbr->state = NBR_STA_DOWN; 2794d267a96Sclaudio nbr->dd_master = 1; 280204df0f8Sclaudio nbr->dd_seq_num = arc4random(); /* RFC: some unique value */ 281204df0f8Sclaudio nbr->id.s_addr = nbr_id; 282204df0f8Sclaudio 283204df0f8Sclaudio /* get next unused peerid */ 284204df0f8Sclaudio while (nbr_find_peerid(++peercnt)) 285204df0f8Sclaudio ; 286204df0f8Sclaudio nbr->peerid = peercnt; 287204df0f8Sclaudio head = NBR_HASH(nbr->peerid); 288204df0f8Sclaudio LIST_INSERT_HEAD(head, nbr, hash); 289204df0f8Sclaudio 290204df0f8Sclaudio /* add to peer list */ 291204df0f8Sclaudio nbr->iface = iface; 292204df0f8Sclaudio LIST_INSERT_HEAD(&iface->nbr_list, nbr, entry); 293204df0f8Sclaudio 294204df0f8Sclaudio TAILQ_INIT(&nbr->ls_retrans_list); 295204df0f8Sclaudio TAILQ_INIT(&nbr->db_sum_list); 296204df0f8Sclaudio TAILQ_INIT(&nbr->ls_req_list); 297204df0f8Sclaudio 298204df0f8Sclaudio nbr->ls_req = NULL; 299204df0f8Sclaudio 300204df0f8Sclaudio if (self) { 301204df0f8Sclaudio nbr->state = NBR_STA_FULL; 302204df0f8Sclaudio nbr->addr.s_addr = iface->addr.s_addr; 303204df0f8Sclaudio nbr->priority = iface->priority; 304204df0f8Sclaudio } 305204df0f8Sclaudio 306204df0f8Sclaudio /* set event structures */ 307204df0f8Sclaudio evtimer_set(&nbr->inactivity_timer, nbr_itimer, nbr); 308204df0f8Sclaudio evtimer_set(&nbr->db_tx_timer, db_tx_timer, nbr); 309204df0f8Sclaudio evtimer_set(&nbr->lsreq_tx_timer, ls_req_tx_timer, nbr); 310cb75af8bSclaudio evtimer_set(&nbr->ls_retrans_timer, ls_retrans_timer, nbr); 311204df0f8Sclaudio evtimer_set(&nbr->adj_timer, nbr_adj_timer, nbr); 312204df0f8Sclaudio 313204df0f8Sclaudio bzero(&rn, sizeof(rn)); 314204df0f8Sclaudio rn.id.s_addr = nbr->id.s_addr; 315204df0f8Sclaudio rn.area_id.s_addr = nbr->iface->area->id.s_addr; 316204df0f8Sclaudio rn.state = nbr->state; 317204df0f8Sclaudio rn.self = self; 318204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_NEIGHBOR_UP, nbr->peerid, 0, &rn, 319204df0f8Sclaudio sizeof(rn)); 320204df0f8Sclaudio 321204df0f8Sclaudio return (nbr); 322204df0f8Sclaudio } 323204df0f8Sclaudio 32435277385Sclaudio void 325204df0f8Sclaudio nbr_del(struct nbr *nbr) 326204df0f8Sclaudio { 327204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_NEIGHBOR_DOWN, nbr->peerid, 0, NULL, 0); 328204df0f8Sclaudio 329a302a2ceSclaudio if (evtimer_pending(&nbr->inactivity_timer, NULL)) 330a302a2ceSclaudio evtimer_del(&nbr->inactivity_timer); 331a302a2ceSclaudio if (evtimer_pending(&nbr->db_tx_timer, NULL)) 332a302a2ceSclaudio evtimer_del(&nbr->db_tx_timer); 333a302a2ceSclaudio if (evtimer_pending(&nbr->lsreq_tx_timer, NULL)) 334a302a2ceSclaudio evtimer_del(&nbr->lsreq_tx_timer); 335a302a2ceSclaudio if (evtimer_pending(&nbr->ls_retrans_timer, NULL)) 336a302a2ceSclaudio evtimer_del(&nbr->ls_retrans_timer); 337a302a2ceSclaudio if (evtimer_pending(&nbr->adj_timer, NULL)) 338a302a2ceSclaudio evtimer_del(&nbr->adj_timer); 339a302a2ceSclaudio 340204df0f8Sclaudio /* clear lists */ 341204df0f8Sclaudio ls_retrans_list_clr(nbr); 342204df0f8Sclaudio db_sum_list_clr(nbr); 343204df0f8Sclaudio ls_req_list_clr(nbr); 344204df0f8Sclaudio 345204df0f8Sclaudio LIST_REMOVE(nbr, entry); 346204df0f8Sclaudio LIST_REMOVE(nbr, hash); 347204df0f8Sclaudio 348204df0f8Sclaudio free(nbr); 349204df0f8Sclaudio } 350204df0f8Sclaudio 351204df0f8Sclaudio struct nbr * 352204df0f8Sclaudio nbr_find_peerid(u_int32_t peerid) 353204df0f8Sclaudio { 354204df0f8Sclaudio struct nbr_head *head; 355204df0f8Sclaudio struct nbr *nbr; 356204df0f8Sclaudio 357204df0f8Sclaudio head = NBR_HASH(peerid); 358204df0f8Sclaudio 359204df0f8Sclaudio LIST_FOREACH(nbr, head, hash) { 360204df0f8Sclaudio if (nbr->peerid == peerid) 361204df0f8Sclaudio return (nbr); 362204df0f8Sclaudio } 363204df0f8Sclaudio 364204df0f8Sclaudio return (NULL); 365204df0f8Sclaudio } 366204df0f8Sclaudio 367204df0f8Sclaudio struct nbr * 368204df0f8Sclaudio nbr_find_id(struct iface *iface, u_int32_t rtr_id) 369204df0f8Sclaudio { 370204df0f8Sclaudio struct nbr *nbr = NULL; 371204df0f8Sclaudio 372204df0f8Sclaudio LIST_FOREACH(nbr, &iface->nbr_list, entry) { 3733aede346Sclaudio if (nbr->id.s_addr == rtr_id) 374204df0f8Sclaudio return (nbr); 375204df0f8Sclaudio } 376204df0f8Sclaudio 377204df0f8Sclaudio return (NULL); 378204df0f8Sclaudio } 379204df0f8Sclaudio 380204df0f8Sclaudio /* timers */ 3813aede346Sclaudio /* ARGSUSED */ 382204df0f8Sclaudio void 383204df0f8Sclaudio nbr_itimer(int fd, short event, void *arg) 384204df0f8Sclaudio { 385204df0f8Sclaudio struct nbr *nbr = arg; 386204df0f8Sclaudio 3873aede346Sclaudio if (nbr->state == NBR_STA_DOWN) 38837cea71bSnorby nbr_del(nbr); 3893aede346Sclaudio else 390204df0f8Sclaudio nbr_fsm(nbr, NBR_EVT_ITIMER); 391204df0f8Sclaudio } 392204df0f8Sclaudio 3933aede346Sclaudio void 394204df0f8Sclaudio nbr_start_itimer(struct nbr *nbr) 395204df0f8Sclaudio { 396204df0f8Sclaudio struct timeval tv; 397204df0f8Sclaudio 398204df0f8Sclaudio timerclear(&tv); 399204df0f8Sclaudio tv.tv_sec = nbr->iface->dead_interval; 400204df0f8Sclaudio 4013aede346Sclaudio if (evtimer_add(&nbr->inactivity_timer, &tv) == -1) 4023aede346Sclaudio fatal("nbr_start_itimer"); 403204df0f8Sclaudio } 404204df0f8Sclaudio 4053aede346Sclaudio void 406204df0f8Sclaudio nbr_stop_itimer(struct nbr *nbr) 407204df0f8Sclaudio { 4083aede346Sclaudio if (evtimer_del(&nbr->inactivity_timer) == -1) 4093aede346Sclaudio fatal("nbr_stop_itimer"); 410204df0f8Sclaudio } 411204df0f8Sclaudio 4123aede346Sclaudio void 413204df0f8Sclaudio nbr_reset_itimer(struct nbr *nbr) 414204df0f8Sclaudio { 415204df0f8Sclaudio struct timeval tv; 416204df0f8Sclaudio 417204df0f8Sclaudio timerclear(&tv); 418204df0f8Sclaudio tv.tv_sec = nbr->iface->dead_interval; 419204df0f8Sclaudio 4203aede346Sclaudio if (evtimer_add(&nbr->inactivity_timer, &tv) == -1) 4213aede346Sclaudio fatal("nbr_reset_itimer"); 422204df0f8Sclaudio } 423204df0f8Sclaudio 4243aede346Sclaudio /* ARGSUSED */ 425204df0f8Sclaudio void 426204df0f8Sclaudio nbr_adj_timer(int fd, short event, void *arg) 427204df0f8Sclaudio { 428204df0f8Sclaudio struct nbr *nbr = arg; 429204df0f8Sclaudio 430718e8ec2Snorby if (nbr->state == NBR_STA_2_WAY) 431718e8ec2Snorby return ; 432718e8ec2Snorby 433f71e573aSclaudio if (nbr->state & NBR_STA_ACTIVE && nbr->state != NBR_STA_FULL) { 434f74cc9a4Sclaudio log_warnx("nbr_adj_timer: failed to form adjacency with %s", 435f74cc9a4Sclaudio inet_ntoa(nbr->id)); 436204df0f8Sclaudio nbr_fsm(nbr, NBR_EVT_ADJTMOUT); 437204df0f8Sclaudio } 438204df0f8Sclaudio } 439204df0f8Sclaudio 4403aede346Sclaudio void 441204df0f8Sclaudio nbr_start_adj_timer(struct nbr *nbr) 442204df0f8Sclaudio { 443204df0f8Sclaudio struct timeval tv; 444204df0f8Sclaudio 445204df0f8Sclaudio timerclear(&tv); 446204df0f8Sclaudio tv.tv_sec = DEFAULT_ADJ_TMOUT; 447204df0f8Sclaudio 4483aede346Sclaudio if (evtimer_add(&nbr->adj_timer, &tv) == -1) 4493aede346Sclaudio fatal("nbr_start_adj_timer"); 450204df0f8Sclaudio } 451204df0f8Sclaudio 452204df0f8Sclaudio /* actions */ 453204df0f8Sclaudio int 454204df0f8Sclaudio nbr_act_reset_itimer(struct nbr *nbr) 455204df0f8Sclaudio { 4563aede346Sclaudio nbr_reset_itimer(nbr); 457204df0f8Sclaudio 458204df0f8Sclaudio return (0); 459204df0f8Sclaudio } 460204df0f8Sclaudio 461204df0f8Sclaudio int 462204df0f8Sclaudio nbr_act_start_itimer(struct nbr *nbr) 463204df0f8Sclaudio { 4643aede346Sclaudio nbr_start_itimer(nbr); 465204df0f8Sclaudio 466204df0f8Sclaudio return (0); 467204df0f8Sclaudio } 468204df0f8Sclaudio 469204df0f8Sclaudio int 470204df0f8Sclaudio nbr_adj_ok(struct nbr *nbr) 471204df0f8Sclaudio { 472204df0f8Sclaudio struct iface *iface = nbr->iface; 473204df0f8Sclaudio 474204df0f8Sclaudio switch (iface->type) { 475204df0f8Sclaudio case IF_TYPE_POINTOPOINT: 476204df0f8Sclaudio case IF_TYPE_VIRTUALLINK: 477204df0f8Sclaudio case IF_TYPE_POINTOMULTIPOINT: 4783e038149Snorby /* always ok */ 479204df0f8Sclaudio break; 480204df0f8Sclaudio case IF_TYPE_BROADCAST: 481204df0f8Sclaudio case IF_TYPE_NBMA: 482204df0f8Sclaudio /* 483204df0f8Sclaudio * if neighbor is dr, bdr or router self is dr or bdr 4849fe0edffSdavid * start forming adjacency 485204df0f8Sclaudio */ 486204df0f8Sclaudio if (iface->dr == nbr || iface->bdr == nbr || 487204df0f8Sclaudio iface->state & IF_STA_DRORBDR) 488204df0f8Sclaudio break; 489204df0f8Sclaudio return (0); 490204df0f8Sclaudio default: 491*98c612a2Snorby fatalx("nbr_adj_ok: unknown interface type"); 492204df0f8Sclaudio } 493204df0f8Sclaudio return (1); 494204df0f8Sclaudio } 495204df0f8Sclaudio 496204df0f8Sclaudio int 497204df0f8Sclaudio nbr_act_eval(struct nbr *nbr) 498204df0f8Sclaudio { 499204df0f8Sclaudio if (!nbr_adj_ok(nbr)) { 500204df0f8Sclaudio nbr->state = NBR_STA_2_WAY; 501204df0f8Sclaudio return (0); 502204df0f8Sclaudio } 503204df0f8Sclaudio 504204df0f8Sclaudio nbr->state = NBR_STA_XSTRT; 5054d267a96Sclaudio nbr->dd_master = 1; 506204df0f8Sclaudio nbr->dd_seq_num++; /* as per RFC */ 507299d99d9Sclaudio nbr->dd_pending = 0; 508204df0f8Sclaudio /* initial db negotiation */ 509204df0f8Sclaudio start_db_tx_timer(nbr); 510204df0f8Sclaudio 5111ccc5a96Snorby nbr_start_adj_timer(nbr); 5121ccc5a96Snorby 513204df0f8Sclaudio return (0); 514204df0f8Sclaudio } 515204df0f8Sclaudio 516204df0f8Sclaudio int 517204df0f8Sclaudio nbr_act_snapshot(struct nbr *nbr) 518204df0f8Sclaudio { 519204df0f8Sclaudio stop_db_tx_timer(nbr); 520204df0f8Sclaudio 521204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_DB_SNAPSHOT, nbr->peerid, 0, NULL, 0); 522204df0f8Sclaudio 523204df0f8Sclaudio return (0); 524204df0f8Sclaudio } 525204df0f8Sclaudio 526204df0f8Sclaudio int 527204df0f8Sclaudio nbr_act_exchange_done(struct nbr *nbr) 528204df0f8Sclaudio { 5294d267a96Sclaudio if (nbr->dd_master) 530204df0f8Sclaudio stop_db_tx_timer(nbr); 531204df0f8Sclaudio 532299d99d9Sclaudio if (ls_req_list_empty(nbr) && nbr->state == NBR_STA_XCHNG && 533299d99d9Sclaudio nbr->dd_pending == 0) { 534204df0f8Sclaudio nbr->state = NBR_STA_FULL; 535204df0f8Sclaudio return (0); 536204df0f8Sclaudio } 537204df0f8Sclaudio 538204df0f8Sclaudio nbr->state = NBR_STA_LOAD; 539299d99d9Sclaudio 540299d99d9Sclaudio if (!ls_req_list_empty(nbr)) 541204df0f8Sclaudio start_ls_req_tx_timer(nbr); 542204df0f8Sclaudio 543204df0f8Sclaudio return (0); 544204df0f8Sclaudio } 545204df0f8Sclaudio 546204df0f8Sclaudio int 547204df0f8Sclaudio nbr_act_adj_ok(struct nbr *nbr) 548204df0f8Sclaudio { 549204df0f8Sclaudio if (nbr_adj_ok(nbr)) { 550204df0f8Sclaudio if (nbr->state == NBR_STA_2_WAY) 551204df0f8Sclaudio return (nbr_act_eval(nbr)); 552204df0f8Sclaudio } else { 553204df0f8Sclaudio nbr->state = NBR_STA_2_WAY; 554204df0f8Sclaudio return (nbr_act_clear_lists(nbr)); 555204df0f8Sclaudio } 556204df0f8Sclaudio 557204df0f8Sclaudio return (0); 558204df0f8Sclaudio } 559204df0f8Sclaudio 560204df0f8Sclaudio int 561204df0f8Sclaudio nbr_act_restart_dd(struct nbr *nbr) 562204df0f8Sclaudio { 5633922c68bSclaudio nbr_act_clear_lists(nbr); 5643922c68bSclaudio 5653922c68bSclaudio if (!nbr_adj_ok(nbr)) { 5663922c68bSclaudio nbr->state = NBR_STA_2_WAY; 5673922c68bSclaudio return (0); 5683922c68bSclaudio } 5693922c68bSclaudio 5703922c68bSclaudio nbr->state = NBR_STA_XSTRT; 5714d267a96Sclaudio nbr->dd_master = 1; 572204df0f8Sclaudio nbr->dd_seq_num += arc4random() & 0xffff; 573299d99d9Sclaudio nbr->dd_pending = 0; 574204df0f8Sclaudio 5753922c68bSclaudio /* initial db negotiation */ 5763922c68bSclaudio start_db_tx_timer(nbr); 5773922c68bSclaudio 5781ccc5a96Snorby nbr_start_adj_timer(nbr); 5791ccc5a96Snorby 5803922c68bSclaudio return (0); 581204df0f8Sclaudio } 582204df0f8Sclaudio 583204df0f8Sclaudio int 584204df0f8Sclaudio nbr_act_delete(struct nbr *nbr) 585204df0f8Sclaudio { 58637cea71bSnorby struct timeval tv; 58737cea71bSnorby 58835277385Sclaudio if (nbr == nbr->iface->self) 58935277385Sclaudio return (0); 59035277385Sclaudio 591204df0f8Sclaudio /* stop timers */ 5923aede346Sclaudio nbr_stop_itimer(nbr); 593204df0f8Sclaudio 594204df0f8Sclaudio /* clear dr and bdr */ 595204df0f8Sclaudio nbr->dr.s_addr = 0; 596204df0f8Sclaudio nbr->bdr.s_addr = 0; 59703431b74Snorby nbr->crypt_seq_num = 0; 59803431b74Snorby 59937cea71bSnorby /* schedule kill timer */ 60037cea71bSnorby timerclear(&tv); 60137cea71bSnorby tv.tv_sec = DEFAULT_NBR_TMOUT; 60237cea71bSnorby 60337cea71bSnorby if (evtimer_add(&nbr->inactivity_timer, &tv)) { 60437cea71bSnorby log_warnx("nbr_act_delete: error scheduling neighbor ID %s " 60537cea71bSnorby "for removal", inet_ntoa(nbr->id)); 60637cea71bSnorby } 60737cea71bSnorby 608204df0f8Sclaudio return (nbr_act_clear_lists(nbr)); 609204df0f8Sclaudio } 610204df0f8Sclaudio 611204df0f8Sclaudio int 612204df0f8Sclaudio nbr_act_clear_lists(struct nbr *nbr) 613204df0f8Sclaudio { 6143aede346Sclaudio /* stop timers */ 6153aede346Sclaudio stop_db_tx_timer(nbr); 6163aede346Sclaudio stop_ls_req_tx_timer(nbr); 617204df0f8Sclaudio 618204df0f8Sclaudio /* clear lists */ 619204df0f8Sclaudio ls_retrans_list_clr(nbr); 620204df0f8Sclaudio db_sum_list_clr(nbr); 621204df0f8Sclaudio ls_req_list_clr(nbr); 622204df0f8Sclaudio 623204df0f8Sclaudio return (0); 624204df0f8Sclaudio } 625204df0f8Sclaudio 626204df0f8Sclaudio int 627204df0f8Sclaudio nbr_act_hello_check(struct nbr *nbr) 628204df0f8Sclaudio { 629204df0f8Sclaudio log_debug("nbr_act_hello_check: neighbor ID %s", inet_ntoa(nbr->id)); 630204df0f8Sclaudio 631204df0f8Sclaudio return (-1); 632204df0f8Sclaudio } 633204df0f8Sclaudio 634204df0f8Sclaudio struct ctl_nbr * 635204df0f8Sclaudio nbr_to_ctl(struct nbr *nbr) 636204df0f8Sclaudio { 637204df0f8Sclaudio static struct ctl_nbr nctl; 638204df0f8Sclaudio struct timeval tv, now, res; 639204df0f8Sclaudio struct lsa_entry *le; 640204df0f8Sclaudio 641204df0f8Sclaudio memcpy(nctl.name, nbr->iface->name, sizeof(nctl.name)); 642204df0f8Sclaudio memcpy(&nctl.id, &nbr->id, sizeof(nctl.id)); 643d13813cbSclaudio memcpy(&nctl.addr, &nbr->addr, sizeof(nctl.addr)); 644204df0f8Sclaudio memcpy(&nctl.dr, &nbr->dr, sizeof(nctl.dr)); 645204df0f8Sclaudio memcpy(&nctl.bdr, &nbr->bdr, sizeof(nctl.bdr)); 646204df0f8Sclaudio memcpy(&nctl.area, &nbr->iface->area->id, sizeof(nctl.area)); 647204df0f8Sclaudio 648204df0f8Sclaudio /* this list is 99% of the time empty so that's OK for now */ 649204df0f8Sclaudio nctl.db_sum_lst_cnt = 0; 650204df0f8Sclaudio TAILQ_FOREACH(le, &nbr->db_sum_list, entry) 651204df0f8Sclaudio nctl.db_sum_lst_cnt++; 652204df0f8Sclaudio 653204df0f8Sclaudio nctl.ls_req_lst_cnt = nbr->ls_req_cnt; 6541ba81fefSnorby nctl.ls_retrans_lst_cnt = nbr->ls_ret_cnt; 655204df0f8Sclaudio 656204df0f8Sclaudio nctl.nbr_state = nbr->state; 657944ca59cSclaudio 658944ca59cSclaudio /* 659944ca59cSclaudio * We need to trick a bit to show the remote iface state. 660944ca59cSclaudio * The idea is to print DR, BDR or DROther dependent on 661944ca59cSclaudio * the type of the neighbor. 662944ca59cSclaudio */ 663944ca59cSclaudio if (nbr->iface->dr == nbr) 664944ca59cSclaudio nctl.iface_state = IF_STA_DR; 665944ca59cSclaudio else if (nbr->iface->bdr == nbr) 666944ca59cSclaudio nctl.iface_state = IF_STA_BACKUP; 667944ca59cSclaudio else if (nbr->iface->state & IF_STA_MULTI) 668944ca59cSclaudio nctl.iface_state = IF_STA_DROTHER; 669944ca59cSclaudio else 670204df0f8Sclaudio nctl.iface_state = nbr->iface->state; 671204df0f8Sclaudio 672204df0f8Sclaudio nctl.state_chng_cnt = nbr->stats.sta_chng; 673204df0f8Sclaudio 674204df0f8Sclaudio nctl.priority = nbr->priority; 675204df0f8Sclaudio nctl.options = nbr->options; 676204df0f8Sclaudio 677204df0f8Sclaudio gettimeofday(&now, NULL); 678204df0f8Sclaudio if (evtimer_pending(&nbr->inactivity_timer, &tv)) { 679204df0f8Sclaudio timersub(&tv, &now, &res); 680c843cd3cSclaudio if (nbr->state & NBR_STA_DOWN) 681c843cd3cSclaudio nctl.dead_timer = DEFAULT_NBR_TMOUT - res.tv_sec; 682c843cd3cSclaudio else 683204df0f8Sclaudio nctl.dead_timer = res.tv_sec; 684204df0f8Sclaudio } else 685204df0f8Sclaudio nctl.dead_timer = 0; 686204df0f8Sclaudio 687129e6b5fSnorby if (nbr->state == NBR_STA_FULL) { 688129e6b5fSnorby nctl.uptime = now.tv_sec - nbr->uptime; 689129e6b5fSnorby } else 690129e6b5fSnorby nctl.uptime = 0; 691129e6b5fSnorby 692204df0f8Sclaudio return (&nctl); 693204df0f8Sclaudio } 694204df0f8Sclaudio 695204df0f8Sclaudio struct lsa_hdr * 696204df0f8Sclaudio lsa_hdr_new(void) 697204df0f8Sclaudio { 698204df0f8Sclaudio struct lsa_hdr *lsa_hdr = NULL; 699204df0f8Sclaudio 700204df0f8Sclaudio if ((lsa_hdr = calloc(1, sizeof(*lsa_hdr))) == NULL) 701204df0f8Sclaudio fatal("lsa_hdr_new"); 702204df0f8Sclaudio 703204df0f8Sclaudio return (lsa_hdr); 704204df0f8Sclaudio } 705