1*d13813cbSclaudio /* $OpenBSD: neighbor.c,v 1.5 2005/02/09 12:53:17 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 53204df0f8Sclaudio u_int32_t peercnt; 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}, 63204df0f8Sclaudio {NBR_STA_BIDIR, NBR_EVT_2_WAY_RCVD, 0, 0}, 64204df0f8Sclaudio {NBR_STA_INIT, NBR_EVT_1_WAY_RCVD, 0, 0}, 65204df0f8Sclaudio {NBR_STA_DOWN, NBR_EVT_HELLO_RCVD, NBR_ACT_STRT_ITIMER, NBR_STA_INIT}, 66204df0f8Sclaudio {NBR_STA_DOWN, NBR_EVT_STRT, NBR_ACT_STRT, NBR_STA_ATTEMPT}, 67204df0f8Sclaudio {NBR_STA_ATTEMPT, NBR_EVT_HELLO_RCVD, NBR_ACT_RST_ITIMER, NBR_STA_INIT}, 68204df0f8Sclaudio {NBR_STA_INIT, NBR_EVT_2_WAY_RCVD, NBR_ACT_EVAL, 0}, 69204df0f8Sclaudio {NBR_STA_XSTRT, NBR_EVT_NEG_DONE, NBR_ACT_SNAP, NBR_STA_SNAP}, 70204df0f8Sclaudio {NBR_STA_SNAP, NBR_EVT_SNAP_DONE, NBR_ACT_SNAP_DONE, NBR_STA_XCHNG}, 71204df0f8Sclaudio {NBR_STA_XCHNG, NBR_EVT_XCHNG_DONE, NBR_ACT_XCHNG_DONE, 0}, 72204df0f8Sclaudio {NBR_STA_LOAD, NBR_EVT_LOAD_DONE, 0, NBR_STA_FULL}, 73204df0f8Sclaudio {NBR_STA_2_WAY, NBR_EVT_ADJ_OK, NBR_ACT_EVAL, 0}, 74204df0f8Sclaudio {NBR_STA_ADJFORM, NBR_EVT_ADJ_OK, NBR_ACT_ADJ_OK, 0}, 75204df0f8Sclaudio {NBR_STA_PRELIM, NBR_EVT_ADJ_OK, NBR_ACT_HELLO_CHK, 0}, 76204df0f8Sclaudio {NBR_STA_ADJFORM, NBR_EVT_ADJTMOUT, NBR_ACT_RESTRT_DD, NBR_STA_2_WAY}, 77204df0f8Sclaudio {NBR_STA_FLOOD, NBR_EVT_SEQ_NUM_MIS, NBR_ACT_RESTRT_DD, NBR_STA_XSTRT}, 78204df0f8Sclaudio {NBR_STA_FLOOD, NBR_EVT_BAD_LS_REQ, NBR_ACT_RESTRT_DD, NBR_STA_XSTRT}, 79204df0f8Sclaudio {NBR_STA_ANY, NBR_EVT_KILL_NBR, NBR_ACT_DEL, NBR_STA_DOWN}, 80204df0f8Sclaudio {NBR_STA_ANY, NBR_EVT_LL_DOWN, NBR_ACT_DEL, NBR_STA_DOWN}, 81204df0f8Sclaudio {NBR_STA_ANY, NBR_EVT_ITIMER, NBR_ACT_DEL, NBR_STA_DOWN}, 82204df0f8Sclaudio {NBR_STA_BIDIR, NBR_EVT_1_WAY_RCVD, NBR_ACT_CLR_LST, NBR_STA_INIT}, 83204df0f8Sclaudio {-1, 0, -1, 0}, 84204df0f8Sclaudio }; 85204df0f8Sclaudio 86204df0f8Sclaudio const char * const nbr_event_names[] = { 87204df0f8Sclaudio "NOTHING", 88204df0f8Sclaudio "HELLO_RECEIVED", 89204df0f8Sclaudio "START", 90204df0f8Sclaudio "2_WAY_RECEIVED", 91204df0f8Sclaudio "NEGOTIATION_DONE", 92204df0f8Sclaudio "SNAPSHOT_DONE", 93204df0f8Sclaudio "EXCHANGE_DONE", 94204df0f8Sclaudio "BAD_LS_REQ", 95204df0f8Sclaudio "LOADING_DONE", 96204df0f8Sclaudio "ADJ_OK", 97204df0f8Sclaudio "SEQ_NUM_MISMATCH", 98204df0f8Sclaudio "1_WAY_RECEIVED", 99204df0f8Sclaudio "KILL_NBR", 100204df0f8Sclaudio "INACTIVITY_TIMER", 101204df0f8Sclaudio "LL_DOWN", 102204df0f8Sclaudio "ADJ_TIMEOUT" 103204df0f8Sclaudio }; 104204df0f8Sclaudio 105204df0f8Sclaudio const char * const nbr_action_names[] = { 106204df0f8Sclaudio "NOTHING", 107204df0f8Sclaudio "START", 108204df0f8Sclaudio "RESET_INACTIVITY_TIMER", 109204df0f8Sclaudio "START_INACTIVITY_TIMER", 110204df0f8Sclaudio "EVAL", 111204df0f8Sclaudio "SNAPSHOT", 112204df0f8Sclaudio "SNAPSHOT_DONE", 113204df0f8Sclaudio "EXCHANGE_DONE", 114204df0f8Sclaudio "ADJ_OK", 115204df0f8Sclaudio "RESET_DD", 116204df0f8Sclaudio "DELETE", 117204df0f8Sclaudio "CLEAR_LISTS" 118204df0f8Sclaudio }; 119204df0f8Sclaudio 120204df0f8Sclaudio int 121204df0f8Sclaudio nbr_fsm(struct nbr *nbr, enum nbr_event event) 122204df0f8Sclaudio { 123204df0f8Sclaudio int old_state; 124204df0f8Sclaudio int new_state = 0; 125204df0f8Sclaudio int i, ret = 0; 126204df0f8Sclaudio 127204df0f8Sclaudio if (nbr == nbr->iface->self) 128204df0f8Sclaudio return (0); 129204df0f8Sclaudio 130204df0f8Sclaudio old_state = nbr->state; 131204df0f8Sclaudio for (i = 0; nbr_fsm_tbl[i].state != -1; i++) 132204df0f8Sclaudio if ((nbr_fsm_tbl[i].state & old_state) && 133204df0f8Sclaudio (nbr_fsm_tbl[i].event == event)) { 134204df0f8Sclaudio new_state = nbr_fsm_tbl[i].new_state; 135204df0f8Sclaudio break; 136204df0f8Sclaudio } 137204df0f8Sclaudio 138204df0f8Sclaudio if (nbr_fsm_tbl[i].state == -1) { 139204df0f8Sclaudio /* XXX event outside of the defined fsm, ignore it. */ 140204df0f8Sclaudio log_debug("nbr_fsm: neighbor ID %s, " 141204df0f8Sclaudio "event %s not expected in state %s", 142204df0f8Sclaudio inet_ntoa(nbr->id), nbr_event_name(event), 143204df0f8Sclaudio nbr_state_name(old_state)); 144204df0f8Sclaudio return (0); 145204df0f8Sclaudio } 146204df0f8Sclaudio 147204df0f8Sclaudio switch (nbr_fsm_tbl[i].action) { 148204df0f8Sclaudio case NBR_ACT_STRT: 149204df0f8Sclaudio ret = nbr_act_start(nbr); 150204df0f8Sclaudio break; 151204df0f8Sclaudio case NBR_ACT_RST_ITIMER: 152204df0f8Sclaudio ret = nbr_act_reset_itimer(nbr); 153204df0f8Sclaudio break; 154204df0f8Sclaudio case NBR_ACT_STRT_ITIMER: 155204df0f8Sclaudio ret = nbr_act_start_itimer(nbr); 156204df0f8Sclaudio break; 157204df0f8Sclaudio case NBR_ACT_EVAL: 158204df0f8Sclaudio ret = nbr_act_eval(nbr); 159204df0f8Sclaudio break; 160204df0f8Sclaudio case NBR_ACT_SNAP: 161204df0f8Sclaudio ret = nbr_act_snapshot(nbr); 162204df0f8Sclaudio break; 163204df0f8Sclaudio case NBR_ACT_SNAP_DONE: 164204df0f8Sclaudio /* start db exchange */ 165204df0f8Sclaudio start_db_tx_timer(nbr); 166204df0f8Sclaudio break; 167204df0f8Sclaudio case NBR_ACT_XCHNG_DONE: 168204df0f8Sclaudio ret = nbr_act_exchange_done(nbr); 169204df0f8Sclaudio break; 170204df0f8Sclaudio case NBR_ACT_ADJ_OK: 171204df0f8Sclaudio ret = nbr_act_adj_ok(nbr); 172204df0f8Sclaudio break; 173204df0f8Sclaudio case NBR_ACT_RESTRT_DD: 174204df0f8Sclaudio ret = nbr_act_restart_dd(nbr); 175204df0f8Sclaudio break; 176204df0f8Sclaudio case NBR_ACT_DEL: 177204df0f8Sclaudio ret = nbr_act_delete(nbr); 178204df0f8Sclaudio break; 179204df0f8Sclaudio case NBR_ACT_CLR_LST: 180204df0f8Sclaudio ret = nbr_act_clear_lists(nbr); 181204df0f8Sclaudio break; 182204df0f8Sclaudio case NBR_ACT_HELLO_CHK: 183204df0f8Sclaudio ret = nbr_act_hello_check(nbr); 184204df0f8Sclaudio break; 185204df0f8Sclaudio default: 186204df0f8Sclaudio /* do nothing */ 187204df0f8Sclaudio break; 188204df0f8Sclaudio } 189204df0f8Sclaudio 190204df0f8Sclaudio if (ret) { 191204df0f8Sclaudio log_debug("nbr_fsm: error changing state for neighbor ID %s, " 192204df0f8Sclaudio "event %s, state %s", inet_ntoa(nbr->id), 193204df0f8Sclaudio nbr_event_name(event), nbr_state_name(old_state)); 194204df0f8Sclaudio return (-1); 195204df0f8Sclaudio } 196204df0f8Sclaudio 197204df0f8Sclaudio if (new_state != 0) 198204df0f8Sclaudio nbr->state = new_state; 199204df0f8Sclaudio 200204df0f8Sclaudio if (nbr->state != old_state) 201204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_NEIGHBOR_CHANGE, 202204df0f8Sclaudio nbr->peerid, 0, &new_state, sizeof(new_state)); 203204df0f8Sclaudio 204204df0f8Sclaudio if (old_state & ~NBR_STA_PRELIM && new_state & NBR_STA_PRELIM) 205204df0f8Sclaudio /* bidirectional communication lost */ 206204df0f8Sclaudio if_fsm(nbr->iface, IF_EVT_NBR_CHNG); 207204df0f8Sclaudio 208204df0f8Sclaudio if (old_state != nbr->state) { 209204df0f8Sclaudio nbr->stats.sta_chng++; 210204df0f8Sclaudio log_debug("nbr_fsm: event %s resulted in action %s and " 211204df0f8Sclaudio "changing state for neighbor ID %s from %s to %s", 212204df0f8Sclaudio nbr_event_name(event), 213204df0f8Sclaudio nbr_action_name(nbr_fsm_tbl[i].action), 214204df0f8Sclaudio inet_ntoa(nbr->id), nbr_state_name(old_state), 215204df0f8Sclaudio nbr_state_name(nbr->state)); 216204df0f8Sclaudio } 217204df0f8Sclaudio 218204df0f8Sclaudio return (ret); 219204df0f8Sclaudio } 220204df0f8Sclaudio 221204df0f8Sclaudio void 222204df0f8Sclaudio nbr_init(u_int32_t hashsize) 223204df0f8Sclaudio { 224204df0f8Sclaudio u_int32_t hs, i; 225204df0f8Sclaudio 226204df0f8Sclaudio for (hs = 1; hs < hashsize; hs <<= 1) 227204df0f8Sclaudio ; 228204df0f8Sclaudio nbrtable.hashtbl = calloc(hs, sizeof(struct nbr_head)); 229204df0f8Sclaudio if (nbrtable.hashtbl == NULL) 230204df0f8Sclaudio fatal("nbr_init"); 231204df0f8Sclaudio 232204df0f8Sclaudio for (i = 0; i < hs; i++) 233204df0f8Sclaudio LIST_INIT(&nbrtable.hashtbl[i]); 234204df0f8Sclaudio 235204df0f8Sclaudio nbrtable.hashmask = hs - 1; 236204df0f8Sclaudio } 237204df0f8Sclaudio 238204df0f8Sclaudio struct nbr * 239204df0f8Sclaudio nbr_new(u_int32_t nbr_id, struct iface *iface, int self) 240204df0f8Sclaudio { 241204df0f8Sclaudio struct nbr_head *head; 242204df0f8Sclaudio struct nbr *nbr = NULL; 243204df0f8Sclaudio struct rde_nbr rn; 244204df0f8Sclaudio 245204df0f8Sclaudio if ((nbr = calloc(1, sizeof(*nbr))) == NULL) 246204df0f8Sclaudio fatal("nbr_new"); 247204df0f8Sclaudio 248204df0f8Sclaudio nbr->state = NBR_STA_DOWN; 249204df0f8Sclaudio nbr->master = true; 250204df0f8Sclaudio nbr->dd_seq_num = arc4random(); /* RFC: some unique value */ 251204df0f8Sclaudio nbr->id.s_addr = nbr_id; 252204df0f8Sclaudio 253204df0f8Sclaudio /* get next unused peerid */ 254204df0f8Sclaudio while (nbr_find_peerid(++peercnt)) 255204df0f8Sclaudio ; 256204df0f8Sclaudio nbr->peerid = peercnt; 257204df0f8Sclaudio head = NBR_HASH(nbr->peerid); 258204df0f8Sclaudio LIST_INSERT_HEAD(head, nbr, hash); 259204df0f8Sclaudio 260204df0f8Sclaudio /* add to peer list */ 261204df0f8Sclaudio nbr->iface = iface; 262204df0f8Sclaudio LIST_INSERT_HEAD(&iface->nbr_list, nbr, entry); 263204df0f8Sclaudio 264204df0f8Sclaudio TAILQ_INIT(&nbr->ls_retrans_list); 265204df0f8Sclaudio TAILQ_INIT(&nbr->db_sum_list); 266204df0f8Sclaudio TAILQ_INIT(&nbr->ls_req_list); 267204df0f8Sclaudio 268204df0f8Sclaudio nbr->ls_req = NULL; 269204df0f8Sclaudio 270204df0f8Sclaudio if (self) { 271204df0f8Sclaudio nbr->state = NBR_STA_FULL; 272204df0f8Sclaudio nbr->addr.s_addr = iface->addr.s_addr; 273204df0f8Sclaudio nbr->priority = iface->priority; 274204df0f8Sclaudio } 275204df0f8Sclaudio 276204df0f8Sclaudio /* set event structures */ 277204df0f8Sclaudio evtimer_set(&nbr->inactivity_timer, nbr_itimer, nbr); 278204df0f8Sclaudio evtimer_set(&nbr->db_tx_timer, db_tx_timer, nbr); 279204df0f8Sclaudio evtimer_set(&nbr->lsreq_tx_timer, ls_req_tx_timer, nbr); 280204df0f8Sclaudio evtimer_set(&nbr->adj_timer, nbr_adj_timer, nbr); 281204df0f8Sclaudio 282204df0f8Sclaudio log_debug("nbr_new: neighbor ID %s, peerid %lu", 283204df0f8Sclaudio inet_ntoa(nbr->id), nbr->peerid); 284204df0f8Sclaudio 285204df0f8Sclaudio bzero(&rn, sizeof(rn)); 286204df0f8Sclaudio rn.id.s_addr = nbr->id.s_addr; 287204df0f8Sclaudio rn.area_id.s_addr = nbr->iface->area->id.s_addr; 288204df0f8Sclaudio rn.state = nbr->state; 289204df0f8Sclaudio rn.self = self; 290204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_NEIGHBOR_UP, nbr->peerid, 0, &rn, 291204df0f8Sclaudio sizeof(rn)); 292204df0f8Sclaudio 293204df0f8Sclaudio return (nbr); 294204df0f8Sclaudio } 295204df0f8Sclaudio 296204df0f8Sclaudio int 297204df0f8Sclaudio nbr_del(struct nbr *nbr) 298204df0f8Sclaudio { 299204df0f8Sclaudio log_debug("nbr_del: neighbor ID %s, peerid %lu", inet_ntoa(nbr->id), 300204df0f8Sclaudio nbr->peerid); 301204df0f8Sclaudio 302204df0f8Sclaudio if (nbr == nbr->iface->self) 303204df0f8Sclaudio return (0); 304204df0f8Sclaudio 305204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_NEIGHBOR_DOWN, nbr->peerid, 0, NULL, 0); 306204df0f8Sclaudio 307204df0f8Sclaudio /* clear lists */ 308204df0f8Sclaudio ls_retrans_list_clr(nbr); 309204df0f8Sclaudio db_sum_list_clr(nbr); 310204df0f8Sclaudio ls_req_list_clr(nbr); 311204df0f8Sclaudio 312204df0f8Sclaudio LIST_REMOVE(nbr, entry); 313204df0f8Sclaudio LIST_REMOVE(nbr, hash); 314204df0f8Sclaudio 315204df0f8Sclaudio free(nbr); 316204df0f8Sclaudio 317204df0f8Sclaudio return (0); 318204df0f8Sclaudio } 319204df0f8Sclaudio 320204df0f8Sclaudio struct nbr * 321204df0f8Sclaudio nbr_find_peerid(u_int32_t peerid) 322204df0f8Sclaudio { 323204df0f8Sclaudio struct nbr_head *head; 324204df0f8Sclaudio struct nbr *nbr; 325204df0f8Sclaudio 326204df0f8Sclaudio head = NBR_HASH(peerid); 327204df0f8Sclaudio 328204df0f8Sclaudio LIST_FOREACH(nbr, head, hash) { 329204df0f8Sclaudio if (nbr->peerid == peerid) 330204df0f8Sclaudio return (nbr); 331204df0f8Sclaudio } 332204df0f8Sclaudio 333204df0f8Sclaudio return (NULL); 334204df0f8Sclaudio } 335204df0f8Sclaudio 336204df0f8Sclaudio struct nbr * 337204df0f8Sclaudio nbr_find_id(struct iface *iface, u_int32_t rtr_id) 338204df0f8Sclaudio { 339204df0f8Sclaudio struct nbr *nbr = NULL; 340204df0f8Sclaudio 341204df0f8Sclaudio LIST_FOREACH(nbr, &iface->nbr_list, entry) { 342204df0f8Sclaudio if (nbr->id.s_addr == rtr_id) { 343204df0f8Sclaudio return (nbr); 344204df0f8Sclaudio } 345204df0f8Sclaudio } 346204df0f8Sclaudio 347204df0f8Sclaudio return (NULL); 348204df0f8Sclaudio } 349204df0f8Sclaudio 350204df0f8Sclaudio /* timers */ 351204df0f8Sclaudio void 352204df0f8Sclaudio nbr_itimer(int fd, short event, void *arg) 353204df0f8Sclaudio { 354204df0f8Sclaudio struct nbr *nbr = arg; 355204df0f8Sclaudio 356204df0f8Sclaudio log_debug("nbr_itimer: %s", inet_ntoa(nbr->id)); 357204df0f8Sclaudio 35837cea71bSnorby if (nbr->state == NBR_STA_DOWN) { 35937cea71bSnorby nbr_del(nbr); 36037cea71bSnorby } else 361204df0f8Sclaudio nbr_fsm(nbr, NBR_EVT_ITIMER); 362204df0f8Sclaudio } 363204df0f8Sclaudio 364204df0f8Sclaudio int 365204df0f8Sclaudio nbr_start_itimer(struct nbr *nbr) 366204df0f8Sclaudio { 367204df0f8Sclaudio struct timeval tv; 368204df0f8Sclaudio 369204df0f8Sclaudio log_debug("nbr_start_itimer: %s", inet_ntoa(nbr->id)); 370204df0f8Sclaudio 371204df0f8Sclaudio timerclear(&tv); 372204df0f8Sclaudio tv.tv_sec = nbr->iface->dead_interval; 373204df0f8Sclaudio 374204df0f8Sclaudio return (evtimer_add(&nbr->inactivity_timer, &tv)); 375204df0f8Sclaudio } 376204df0f8Sclaudio 377204df0f8Sclaudio int 378204df0f8Sclaudio nbr_stop_itimer(struct nbr *nbr) 379204df0f8Sclaudio { 380204df0f8Sclaudio return (evtimer_del(&nbr->inactivity_timer)); 381204df0f8Sclaudio } 382204df0f8Sclaudio 383204df0f8Sclaudio int 384204df0f8Sclaudio nbr_reset_itimer(struct nbr *nbr) 385204df0f8Sclaudio { 386204df0f8Sclaudio struct timeval tv; 387204df0f8Sclaudio 388204df0f8Sclaudio timerclear(&tv); 389204df0f8Sclaudio tv.tv_sec = nbr->iface->dead_interval; 390204df0f8Sclaudio 391204df0f8Sclaudio return (evtimer_add(&nbr->inactivity_timer, &tv)); 392204df0f8Sclaudio } 393204df0f8Sclaudio 394204df0f8Sclaudio void 395204df0f8Sclaudio nbr_adj_timer(int fd, short event, void *arg) 396204df0f8Sclaudio { 397204df0f8Sclaudio struct nbr *nbr = arg; 398204df0f8Sclaudio 399204df0f8Sclaudio if (nbr->state != NBR_STA_FULL) { 400204df0f8Sclaudio log_debug("nbr_adj_timer: failed to form adjacency"); 401204df0f8Sclaudio nbr_fsm(nbr, NBR_EVT_ADJTMOUT); 402204df0f8Sclaudio } 403204df0f8Sclaudio } 404204df0f8Sclaudio 405204df0f8Sclaudio int 406204df0f8Sclaudio nbr_start_adj_timer(struct nbr *nbr) 407204df0f8Sclaudio { 408204df0f8Sclaudio struct timeval tv; 409204df0f8Sclaudio 410204df0f8Sclaudio log_debug("nbr_start_adj_timer: %s", inet_ntoa(nbr->id)); 411204df0f8Sclaudio 412204df0f8Sclaudio timerclear(&tv); 413204df0f8Sclaudio tv.tv_sec = DEFAULT_ADJ_TMOUT; 414204df0f8Sclaudio 415204df0f8Sclaudio return (evtimer_add(&nbr->adj_timer, &tv)); 416204df0f8Sclaudio } 417204df0f8Sclaudio 418204df0f8Sclaudio /* actions */ 419204df0f8Sclaudio int 420204df0f8Sclaudio nbr_act_start(struct nbr *nbr) 421204df0f8Sclaudio { 422204df0f8Sclaudio log_debug("nbr_act_start: neighbor ID %s", inet_ntoa(nbr->id)); 423204df0f8Sclaudio 424204df0f8Sclaudio return (-1); 425204df0f8Sclaudio } 426204df0f8Sclaudio 427204df0f8Sclaudio int 428204df0f8Sclaudio nbr_act_reset_itimer(struct nbr *nbr) 429204df0f8Sclaudio { 430204df0f8Sclaudio if (nbr_reset_itimer(nbr)) { 431204df0f8Sclaudio log_warnx("nbr_act_reset_itimer: cannot schedule inactivity " 432204df0f8Sclaudio "timer, neighbor ID %s", inet_ntoa(nbr->id)); 433204df0f8Sclaudio return (-1); 434204df0f8Sclaudio } 435204df0f8Sclaudio 436204df0f8Sclaudio return (0); 437204df0f8Sclaudio } 438204df0f8Sclaudio 439204df0f8Sclaudio int 440204df0f8Sclaudio nbr_act_start_itimer(struct nbr *nbr) 441204df0f8Sclaudio { 442204df0f8Sclaudio if (nbr_start_itimer(nbr)) { 443204df0f8Sclaudio log_warnx("nbr_act_start_itimer: cannot schedule inactivity " 444204df0f8Sclaudio "timer, neighbor ID %s", 445204df0f8Sclaudio inet_ntoa(nbr->id)); 446204df0f8Sclaudio return (-1); 447204df0f8Sclaudio } 448204df0f8Sclaudio 449204df0f8Sclaudio return (0); 450204df0f8Sclaudio } 451204df0f8Sclaudio 452204df0f8Sclaudio int 453204df0f8Sclaudio nbr_adj_ok(struct nbr *nbr) 454204df0f8Sclaudio { 455204df0f8Sclaudio struct iface *iface = nbr->iface; 456204df0f8Sclaudio 457204df0f8Sclaudio switch (iface->type) { 458204df0f8Sclaudio case IF_TYPE_POINTOPOINT: 459204df0f8Sclaudio case IF_TYPE_VIRTUALLINK: 460204df0f8Sclaudio case IF_TYPE_POINTOMULTIPOINT: 461204df0f8Sclaudio break; 462204df0f8Sclaudio case IF_TYPE_BROADCAST: 463204df0f8Sclaudio case IF_TYPE_NBMA: 464204df0f8Sclaudio /* 465204df0f8Sclaudio * if neighbor is dr, bdr or router self is dr or bdr 466204df0f8Sclaudio * start forming adjacancy 467204df0f8Sclaudio */ 468204df0f8Sclaudio if (iface->dr == nbr || iface->bdr == nbr || 469204df0f8Sclaudio iface->state & IF_STA_DRORBDR) 470204df0f8Sclaudio break; 471204df0f8Sclaudio return (0); 472204df0f8Sclaudio default: 473204df0f8Sclaudio fatalx("nbr_act_ok: unknown interface type"); 474204df0f8Sclaudio } 475204df0f8Sclaudio return (1); 476204df0f8Sclaudio } 477204df0f8Sclaudio 478204df0f8Sclaudio int 479204df0f8Sclaudio nbr_act_eval(struct nbr *nbr) 480204df0f8Sclaudio { 481204df0f8Sclaudio log_debug("nbr_act_eval: neighbor ID %s", inet_ntoa(nbr->id)); 482204df0f8Sclaudio 483204df0f8Sclaudio if (!nbr_adj_ok(nbr)) { 484204df0f8Sclaudio nbr->state = NBR_STA_2_WAY; 485204df0f8Sclaudio return (0); 486204df0f8Sclaudio } 487204df0f8Sclaudio 488204df0f8Sclaudio nbr->state = NBR_STA_XSTRT; 489204df0f8Sclaudio nbr->master = true; 490204df0f8Sclaudio nbr->dd_seq_num++; /* as per RFC */ 491204df0f8Sclaudio /* initial db negotiation */ 492204df0f8Sclaudio start_db_tx_timer(nbr); 493204df0f8Sclaudio 494204df0f8Sclaudio return (0); 495204df0f8Sclaudio } 496204df0f8Sclaudio 497204df0f8Sclaudio int 498204df0f8Sclaudio nbr_act_snapshot(struct nbr *nbr) 499204df0f8Sclaudio { 500204df0f8Sclaudio log_debug("nbr_act_snapshot: neighbor ID %s", inet_ntoa(nbr->id)); 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 log_debug("nbr_act_exchange_done: neighbor ID %s", inet_ntoa(nbr->id)); 514204df0f8Sclaudio 515204df0f8Sclaudio if (nbr->master) 516204df0f8Sclaudio stop_db_tx_timer(nbr); 517204df0f8Sclaudio 518204df0f8Sclaudio if (ls_req_list_empty(nbr) && nbr->state == NBR_STA_XCHNG) { 519204df0f8Sclaudio nbr->state = NBR_STA_FULL; 520204df0f8Sclaudio return (0); 521204df0f8Sclaudio } 522204df0f8Sclaudio 523204df0f8Sclaudio nbr->state = NBR_STA_LOAD; 524204df0f8Sclaudio start_ls_req_tx_timer(nbr); 525204df0f8Sclaudio 526204df0f8Sclaudio return (0); 527204df0f8Sclaudio } 528204df0f8Sclaudio 529204df0f8Sclaudio int 530204df0f8Sclaudio nbr_act_adj_ok(struct nbr *nbr) 531204df0f8Sclaudio { 532204df0f8Sclaudio log_debug("nbr_act_adj_ok: neighbor ID %s", inet_ntoa(nbr->id)); 533204df0f8Sclaudio 534204df0f8Sclaudio if (nbr_adj_ok(nbr)) { 535204df0f8Sclaudio if (nbr->state == NBR_STA_2_WAY) 536204df0f8Sclaudio return (nbr_act_eval(nbr)); 537204df0f8Sclaudio } else { 538204df0f8Sclaudio nbr->state = NBR_STA_2_WAY; 539204df0f8Sclaudio return (nbr_act_clear_lists(nbr)); 540204df0f8Sclaudio } 541204df0f8Sclaudio 542204df0f8Sclaudio return (0); 543204df0f8Sclaudio } 544204df0f8Sclaudio 545204df0f8Sclaudio int 546204df0f8Sclaudio nbr_act_restart_dd(struct nbr *nbr) 547204df0f8Sclaudio { 548204df0f8Sclaudio log_debug("nbr_act_restart_dd: neighbor ID %s", inet_ntoa(nbr->id)); 549204df0f8Sclaudio 550204df0f8Sclaudio nbr->master = true; 551204df0f8Sclaudio nbr->dd_seq_num += arc4random() & 0xffff; 552204df0f8Sclaudio 553204df0f8Sclaudio return (nbr_act_clear_lists(nbr)); 554204df0f8Sclaudio } 555204df0f8Sclaudio 556204df0f8Sclaudio int 557204df0f8Sclaudio nbr_act_delete(struct nbr *nbr) 558204df0f8Sclaudio { 55937cea71bSnorby struct timeval tv; 56037cea71bSnorby 561204df0f8Sclaudio log_debug("nbr_act_delete: neighbor ID %s", inet_ntoa(nbr->id)); 562204df0f8Sclaudio 563204df0f8Sclaudio /* stop timers */ 564204df0f8Sclaudio if (nbr_stop_itimer(nbr)) { 565204df0f8Sclaudio log_warnx("nbr_act_delete: error removing inactivity timer, " 566204df0f8Sclaudio "neighbor ID %s", inet_ntoa(nbr->id)); 567204df0f8Sclaudio return (-1); 568204df0f8Sclaudio } 569204df0f8Sclaudio 570204df0f8Sclaudio /* clear dr and bdr */ 571204df0f8Sclaudio nbr->dr.s_addr = 0; 572204df0f8Sclaudio nbr->bdr.s_addr = 0; 573204df0f8Sclaudio 57437cea71bSnorby /* schedule kill timer */ 57537cea71bSnorby timerclear(&tv); 57637cea71bSnorby tv.tv_sec = DEFAULT_NBR_TMOUT; 57737cea71bSnorby 57837cea71bSnorby if (evtimer_add(&nbr->inactivity_timer, &tv)) { 57937cea71bSnorby log_warnx("nbr_act_delete: error scheduling neighbor ID %s " 58037cea71bSnorby "for removal", inet_ntoa(nbr->id)); 58137cea71bSnorby } 58237cea71bSnorby 583204df0f8Sclaudio return (nbr_act_clear_lists(nbr)); 584204df0f8Sclaudio } 585204df0f8Sclaudio 586204df0f8Sclaudio int 587204df0f8Sclaudio nbr_act_clear_lists(struct nbr *nbr) 588204df0f8Sclaudio { 589204df0f8Sclaudio log_debug("nbr_act_clear_lists: neighbor ID %s", inet_ntoa(nbr->id)); 590204df0f8Sclaudio 591204df0f8Sclaudio if (stop_db_tx_timer(nbr)) { 592204df0f8Sclaudio log_warnx("nbr_act_delete: error removing db_tx_timer, " 593204df0f8Sclaudio "neighbor ID %s", inet_ntoa(nbr->id)); 594204df0f8Sclaudio return (-1); 595204df0f8Sclaudio } 596204df0f8Sclaudio 597204df0f8Sclaudio if (stop_ls_req_tx_timer(nbr)) { 598204df0f8Sclaudio log_warnx("nbr_act_delete: error removing lsreq_tx_timer, " 599204df0f8Sclaudio "neighbor ID %s", inet_ntoa(nbr->id)); 600204df0f8Sclaudio return (-1); 601204df0f8Sclaudio } 602204df0f8Sclaudio 603204df0f8Sclaudio /* clear lists */ 604204df0f8Sclaudio ls_retrans_list_clr(nbr); 605204df0f8Sclaudio db_sum_list_clr(nbr); 606204df0f8Sclaudio ls_req_list_clr(nbr); 607204df0f8Sclaudio 608204df0f8Sclaudio return (0); 609204df0f8Sclaudio } 610204df0f8Sclaudio 611204df0f8Sclaudio int 612204df0f8Sclaudio nbr_act_hello_check(struct nbr *nbr) 613204df0f8Sclaudio { 614204df0f8Sclaudio log_debug("nbr_act_hello_check: neighbor ID %s", inet_ntoa(nbr->id)); 615204df0f8Sclaudio 616204df0f8Sclaudio return (-1); 617204df0f8Sclaudio } 618204df0f8Sclaudio 619204df0f8Sclaudio struct ctl_nbr * 620204df0f8Sclaudio nbr_to_ctl(struct nbr *nbr) 621204df0f8Sclaudio { 622204df0f8Sclaudio static struct ctl_nbr nctl; 623204df0f8Sclaudio struct timeval tv, now, res; 624204df0f8Sclaudio struct lsa_entry *le; 625204df0f8Sclaudio 626204df0f8Sclaudio memcpy(nctl.name, nbr->iface->name, sizeof(nctl.name)); 627204df0f8Sclaudio memcpy(&nctl.id, &nbr->id, sizeof(nctl.id)); 628*d13813cbSclaudio memcpy(&nctl.addr, &nbr->addr, sizeof(nctl.addr)); 629204df0f8Sclaudio memcpy(&nctl.dr, &nbr->dr, sizeof(nctl.dr)); 630204df0f8Sclaudio memcpy(&nctl.bdr, &nbr->bdr, sizeof(nctl.bdr)); 631204df0f8Sclaudio memcpy(&nctl.area, &nbr->iface->area->id, sizeof(nctl.area)); 632204df0f8Sclaudio 633204df0f8Sclaudio /* this list is 99% of the time empty so that's OK for now */ 634204df0f8Sclaudio nctl.db_sum_lst_cnt = 0; 635204df0f8Sclaudio TAILQ_FOREACH(le, &nbr->db_sum_list, entry) 636204df0f8Sclaudio nctl.db_sum_lst_cnt++; 637204df0f8Sclaudio 638204df0f8Sclaudio nctl.ls_req_lst_cnt = nbr->ls_req_cnt; 639204df0f8Sclaudio 640204df0f8Sclaudio /* XXX */ 641204df0f8Sclaudio nctl.ls_retrans_lst_cnt = 0; 642204df0f8Sclaudio TAILQ_FOREACH(le, &nbr->ls_retrans_list, entry) 643204df0f8Sclaudio nctl.ls_retrans_lst_cnt++; 644204df0f8Sclaudio 645204df0f8Sclaudio nctl.nbr_state = nbr->state; 646204df0f8Sclaudio nctl.iface_state = nbr->iface->state; 647204df0f8Sclaudio 648204df0f8Sclaudio nctl.state_chng_cnt = nbr->stats.sta_chng; 649204df0f8Sclaudio 650204df0f8Sclaudio nctl.priority = nbr->priority; 651204df0f8Sclaudio nctl.options = nbr->options; 652204df0f8Sclaudio 653204df0f8Sclaudio gettimeofday(&now, NULL); 654204df0f8Sclaudio if (evtimer_pending(&nbr->inactivity_timer, &tv)) { 655204df0f8Sclaudio timersub(&tv, &now, &res); 656204df0f8Sclaudio nctl.dead_timer = res.tv_sec; 657204df0f8Sclaudio } else 658204df0f8Sclaudio nctl.dead_timer = 0; 659204df0f8Sclaudio 660204df0f8Sclaudio return (&nctl); 661204df0f8Sclaudio } 662204df0f8Sclaudio 663204df0f8Sclaudio /* names */ 664204df0f8Sclaudio const char * 665204df0f8Sclaudio nbr_state_name(int state) 666204df0f8Sclaudio { 667204df0f8Sclaudio switch (state) { 668204df0f8Sclaudio case NBR_STA_DOWN: 669204df0f8Sclaudio return ("DOWN"); 670204df0f8Sclaudio case NBR_STA_ATTEMPT: 671204df0f8Sclaudio return ("ATTEMPT"); 672204df0f8Sclaudio case NBR_STA_INIT: 673204df0f8Sclaudio return ("INIT"); 674204df0f8Sclaudio case NBR_STA_2_WAY: 675204df0f8Sclaudio return ("2-WAY"); 676204df0f8Sclaudio case NBR_STA_XSTRT: 677204df0f8Sclaudio return ("EXSTART"); 678204df0f8Sclaudio case NBR_STA_SNAP: 679204df0f8Sclaudio return ("SNAPSHOT"); 680204df0f8Sclaudio case NBR_STA_XCHNG: 681204df0f8Sclaudio return ("EXCHANGE"); 682204df0f8Sclaudio case NBR_STA_LOAD: 683204df0f8Sclaudio return ("LOADING"); 684204df0f8Sclaudio case NBR_STA_FULL: 685204df0f8Sclaudio return ("FULL"); 686204df0f8Sclaudio default: 687204df0f8Sclaudio return ("UNKNOWN"); 688204df0f8Sclaudio } 689204df0f8Sclaudio } 690204df0f8Sclaudio 691204df0f8Sclaudio const char * 692204df0f8Sclaudio nbr_event_name(int event) 693204df0f8Sclaudio { 694204df0f8Sclaudio return (nbr_event_names[event]); 695204df0f8Sclaudio } 696204df0f8Sclaudio 697204df0f8Sclaudio const char * 698204df0f8Sclaudio nbr_action_name(int action) 699204df0f8Sclaudio { 700204df0f8Sclaudio return (nbr_action_names[action]); 701204df0f8Sclaudio } 702204df0f8Sclaudio 703204df0f8Sclaudio struct lsa_hdr * 704204df0f8Sclaudio lsa_hdr_new(void) 705204df0f8Sclaudio { 706204df0f8Sclaudio struct lsa_hdr *lsa_hdr = NULL; 707204df0f8Sclaudio 708204df0f8Sclaudio if ((lsa_hdr = calloc(1, sizeof(*lsa_hdr))) == NULL) 709204df0f8Sclaudio fatal("lsa_hdr_new"); 710204df0f8Sclaudio 711204df0f8Sclaudio return (lsa_hdr); 712204df0f8Sclaudio } 713