1*92141c17Smarkus /* $OpenBSD: neighbor.c,v 1.45 2013/01/17 10:02:04 markus 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, 20087325ee2Smarkus nbr->peerid, 0, &nbr->state, sizeof(nbr->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; 316097ed198Sclaudio rn.ifindex = nbr->iface->ifindex; 317204df0f8Sclaudio rn.state = nbr->state; 318204df0f8Sclaudio rn.self = self; 319204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_NEIGHBOR_UP, nbr->peerid, 0, &rn, 320204df0f8Sclaudio sizeof(rn)); 321204df0f8Sclaudio 322204df0f8Sclaudio return (nbr); 323204df0f8Sclaudio } 324204df0f8Sclaudio 32535277385Sclaudio void 326204df0f8Sclaudio nbr_del(struct nbr *nbr) 327204df0f8Sclaudio { 328204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_NEIGHBOR_DOWN, nbr->peerid, 0, NULL, 0); 329204df0f8Sclaudio 330a302a2ceSclaudio if (evtimer_pending(&nbr->inactivity_timer, NULL)) 331a302a2ceSclaudio evtimer_del(&nbr->inactivity_timer); 332a302a2ceSclaudio if (evtimer_pending(&nbr->db_tx_timer, NULL)) 333a302a2ceSclaudio evtimer_del(&nbr->db_tx_timer); 334a302a2ceSclaudio if (evtimer_pending(&nbr->lsreq_tx_timer, NULL)) 335a302a2ceSclaudio evtimer_del(&nbr->lsreq_tx_timer); 336a302a2ceSclaudio if (evtimer_pending(&nbr->ls_retrans_timer, NULL)) 337a302a2ceSclaudio evtimer_del(&nbr->ls_retrans_timer); 338a302a2ceSclaudio if (evtimer_pending(&nbr->adj_timer, NULL)) 339a302a2ceSclaudio evtimer_del(&nbr->adj_timer); 340a302a2ceSclaudio 341204df0f8Sclaudio /* clear lists */ 342204df0f8Sclaudio ls_retrans_list_clr(nbr); 343204df0f8Sclaudio db_sum_list_clr(nbr); 344204df0f8Sclaudio ls_req_list_clr(nbr); 345204df0f8Sclaudio 34672f25908Sclaudio if (nbr->peerid != NBR_IDSELF) 347204df0f8Sclaudio LIST_REMOVE(nbr, entry); 348204df0f8Sclaudio LIST_REMOVE(nbr, hash); 349204df0f8Sclaudio 350204df0f8Sclaudio free(nbr); 351204df0f8Sclaudio } 352204df0f8Sclaudio 353204df0f8Sclaudio struct nbr * 354204df0f8Sclaudio nbr_find_peerid(u_int32_t peerid) 355204df0f8Sclaudio { 356204df0f8Sclaudio struct nbr_head *head; 357204df0f8Sclaudio struct nbr *nbr; 358204df0f8Sclaudio 359204df0f8Sclaudio head = NBR_HASH(peerid); 360204df0f8Sclaudio 361204df0f8Sclaudio LIST_FOREACH(nbr, head, hash) { 362204df0f8Sclaudio if (nbr->peerid == peerid) 363204df0f8Sclaudio return (nbr); 364204df0f8Sclaudio } 365204df0f8Sclaudio 366204df0f8Sclaudio return (NULL); 367204df0f8Sclaudio } 368204df0f8Sclaudio 369204df0f8Sclaudio struct nbr * 370204df0f8Sclaudio nbr_find_id(struct iface *iface, u_int32_t rtr_id) 371204df0f8Sclaudio { 372204df0f8Sclaudio struct nbr *nbr = NULL; 373204df0f8Sclaudio 374204df0f8Sclaudio LIST_FOREACH(nbr, &iface->nbr_list, entry) { 3753aede346Sclaudio if (nbr->id.s_addr == rtr_id) 376204df0f8Sclaudio return (nbr); 377204df0f8Sclaudio } 378204df0f8Sclaudio 379204df0f8Sclaudio return (NULL); 380204df0f8Sclaudio } 381204df0f8Sclaudio 382204df0f8Sclaudio /* timers */ 3833aede346Sclaudio /* ARGSUSED */ 384204df0f8Sclaudio void 385204df0f8Sclaudio nbr_itimer(int fd, short event, void *arg) 386204df0f8Sclaudio { 387204df0f8Sclaudio struct nbr *nbr = arg; 388204df0f8Sclaudio 3893aede346Sclaudio if (nbr->state == NBR_STA_DOWN) 39037cea71bSnorby nbr_del(nbr); 3913aede346Sclaudio else 392204df0f8Sclaudio nbr_fsm(nbr, NBR_EVT_ITIMER); 393204df0f8Sclaudio } 394204df0f8Sclaudio 3953aede346Sclaudio void 396204df0f8Sclaudio nbr_start_itimer(struct nbr *nbr) 397204df0f8Sclaudio { 398204df0f8Sclaudio struct timeval tv; 399204df0f8Sclaudio 400204df0f8Sclaudio timerclear(&tv); 401204df0f8Sclaudio tv.tv_sec = nbr->iface->dead_interval; 402204df0f8Sclaudio 4033aede346Sclaudio if (evtimer_add(&nbr->inactivity_timer, &tv) == -1) 4043aede346Sclaudio fatal("nbr_start_itimer"); 405204df0f8Sclaudio } 406204df0f8Sclaudio 4073aede346Sclaudio void 408204df0f8Sclaudio nbr_stop_itimer(struct nbr *nbr) 409204df0f8Sclaudio { 4103aede346Sclaudio if (evtimer_del(&nbr->inactivity_timer) == -1) 4113aede346Sclaudio fatal("nbr_stop_itimer"); 412204df0f8Sclaudio } 413204df0f8Sclaudio 4143aede346Sclaudio void 415204df0f8Sclaudio nbr_reset_itimer(struct nbr *nbr) 416204df0f8Sclaudio { 417204df0f8Sclaudio struct timeval tv; 418204df0f8Sclaudio 419204df0f8Sclaudio timerclear(&tv); 420204df0f8Sclaudio tv.tv_sec = nbr->iface->dead_interval; 421204df0f8Sclaudio 4223aede346Sclaudio if (evtimer_add(&nbr->inactivity_timer, &tv) == -1) 4233aede346Sclaudio fatal("nbr_reset_itimer"); 424204df0f8Sclaudio } 425204df0f8Sclaudio 4263aede346Sclaudio /* ARGSUSED */ 427204df0f8Sclaudio void 428204df0f8Sclaudio nbr_adj_timer(int fd, short event, void *arg) 429204df0f8Sclaudio { 430204df0f8Sclaudio struct nbr *nbr = arg; 431204df0f8Sclaudio 432*92141c17Smarkus if (!(nbr->state & NBR_STA_ADJFORM)) 433718e8ec2Snorby return; 434718e8ec2Snorby 435f71e573aSclaudio if (nbr->state & NBR_STA_ACTIVE && nbr->state != NBR_STA_FULL) { 436699b69fbSsthen log_warnx("nbr_adj_timer: failed to form adjacency with %s " 437699b69fbSsthen "on interface %s", inet_ntoa(nbr->id), nbr->iface->name); 438204df0f8Sclaudio nbr_fsm(nbr, NBR_EVT_ADJTMOUT); 439204df0f8Sclaudio } 440204df0f8Sclaudio } 441204df0f8Sclaudio 4423aede346Sclaudio void 443204df0f8Sclaudio nbr_start_adj_timer(struct nbr *nbr) 444204df0f8Sclaudio { 445204df0f8Sclaudio struct timeval tv; 446204df0f8Sclaudio 447204df0f8Sclaudio timerclear(&tv); 448204df0f8Sclaudio tv.tv_sec = DEFAULT_ADJ_TMOUT; 449204df0f8Sclaudio 4503aede346Sclaudio if (evtimer_add(&nbr->adj_timer, &tv) == -1) 4513aede346Sclaudio fatal("nbr_start_adj_timer"); 452204df0f8Sclaudio } 453204df0f8Sclaudio 454204df0f8Sclaudio /* actions */ 455204df0f8Sclaudio int 456204df0f8Sclaudio nbr_act_reset_itimer(struct nbr *nbr) 457204df0f8Sclaudio { 4583aede346Sclaudio nbr_reset_itimer(nbr); 459204df0f8Sclaudio 460204df0f8Sclaudio return (0); 461204df0f8Sclaudio } 462204df0f8Sclaudio 463204df0f8Sclaudio int 464204df0f8Sclaudio nbr_act_start_itimer(struct nbr *nbr) 465204df0f8Sclaudio { 4663aede346Sclaudio nbr_start_itimer(nbr); 467204df0f8Sclaudio 468204df0f8Sclaudio return (0); 469204df0f8Sclaudio } 470204df0f8Sclaudio 471204df0f8Sclaudio int 472204df0f8Sclaudio nbr_adj_ok(struct nbr *nbr) 473204df0f8Sclaudio { 474204df0f8Sclaudio struct iface *iface = nbr->iface; 475204df0f8Sclaudio 476204df0f8Sclaudio switch (iface->type) { 477204df0f8Sclaudio case IF_TYPE_POINTOPOINT: 478204df0f8Sclaudio case IF_TYPE_VIRTUALLINK: 479204df0f8Sclaudio case IF_TYPE_POINTOMULTIPOINT: 4803e038149Snorby /* always ok */ 481204df0f8Sclaudio break; 482204df0f8Sclaudio case IF_TYPE_BROADCAST: 483204df0f8Sclaudio case IF_TYPE_NBMA: 484204df0f8Sclaudio /* 485204df0f8Sclaudio * if neighbor is dr, bdr or router self is dr or bdr 4869fe0edffSdavid * start forming adjacency 487204df0f8Sclaudio */ 488204df0f8Sclaudio if (iface->dr == nbr || iface->bdr == nbr || 489204df0f8Sclaudio iface->state & IF_STA_DRORBDR) 490204df0f8Sclaudio break; 491204df0f8Sclaudio return (0); 492204df0f8Sclaudio default: 49398c612a2Snorby fatalx("nbr_adj_ok: unknown interface type"); 494204df0f8Sclaudio } 495204df0f8Sclaudio return (1); 496204df0f8Sclaudio } 497204df0f8Sclaudio 498204df0f8Sclaudio int 499204df0f8Sclaudio nbr_act_eval(struct nbr *nbr) 500204df0f8Sclaudio { 501204df0f8Sclaudio if (!nbr_adj_ok(nbr)) { 502204df0f8Sclaudio nbr->state = NBR_STA_2_WAY; 503204df0f8Sclaudio return (0); 504204df0f8Sclaudio } 505204df0f8Sclaudio 506204df0f8Sclaudio nbr->state = NBR_STA_XSTRT; 5074d267a96Sclaudio nbr->dd_master = 1; 508204df0f8Sclaudio nbr->dd_seq_num++; /* as per RFC */ 509299d99d9Sclaudio nbr->dd_pending = 0; 510204df0f8Sclaudio /* initial db negotiation */ 511204df0f8Sclaudio start_db_tx_timer(nbr); 512204df0f8Sclaudio 5131ccc5a96Snorby nbr_start_adj_timer(nbr); 5141ccc5a96Snorby 515204df0f8Sclaudio return (0); 516204df0f8Sclaudio } 517204df0f8Sclaudio 518204df0f8Sclaudio int 519204df0f8Sclaudio nbr_act_snapshot(struct nbr *nbr) 520204df0f8Sclaudio { 521204df0f8Sclaudio stop_db_tx_timer(nbr); 522204df0f8Sclaudio 523097ed198Sclaudio ospfe_imsg_compose_rde(IMSG_NEIGHBOR_CAPA, nbr->peerid, 0, 524097ed198Sclaudio &nbr->capa_options, sizeof(nbr->capa_options)); 525204df0f8Sclaudio ospfe_imsg_compose_rde(IMSG_DB_SNAPSHOT, nbr->peerid, 0, NULL, 0); 526204df0f8Sclaudio 527204df0f8Sclaudio return (0); 528204df0f8Sclaudio } 529204df0f8Sclaudio 530204df0f8Sclaudio int 531204df0f8Sclaudio nbr_act_exchange_done(struct nbr *nbr) 532204df0f8Sclaudio { 5334d267a96Sclaudio if (nbr->dd_master) 534204df0f8Sclaudio stop_db_tx_timer(nbr); 535204df0f8Sclaudio 536299d99d9Sclaudio if (ls_req_list_empty(nbr) && nbr->state == NBR_STA_XCHNG && 537299d99d9Sclaudio nbr->dd_pending == 0) { 538204df0f8Sclaudio nbr->state = NBR_STA_FULL; 539204df0f8Sclaudio return (0); 540204df0f8Sclaudio } 541204df0f8Sclaudio 542204df0f8Sclaudio nbr->state = NBR_STA_LOAD; 543299d99d9Sclaudio 544299d99d9Sclaudio if (!ls_req_list_empty(nbr)) 545204df0f8Sclaudio start_ls_req_tx_timer(nbr); 546204df0f8Sclaudio 547204df0f8Sclaudio return (0); 548204df0f8Sclaudio } 549204df0f8Sclaudio 550204df0f8Sclaudio int 551204df0f8Sclaudio nbr_act_adj_ok(struct nbr *nbr) 552204df0f8Sclaudio { 553204df0f8Sclaudio if (nbr_adj_ok(nbr)) { 554204df0f8Sclaudio if (nbr->state == NBR_STA_2_WAY) 555204df0f8Sclaudio return (nbr_act_eval(nbr)); 556204df0f8Sclaudio } else { 557204df0f8Sclaudio nbr->state = NBR_STA_2_WAY; 558204df0f8Sclaudio return (nbr_act_clear_lists(nbr)); 559204df0f8Sclaudio } 560204df0f8Sclaudio 561204df0f8Sclaudio return (0); 562204df0f8Sclaudio } 563204df0f8Sclaudio 564204df0f8Sclaudio int 565204df0f8Sclaudio nbr_act_restart_dd(struct nbr *nbr) 566204df0f8Sclaudio { 5673922c68bSclaudio nbr_act_clear_lists(nbr); 5683922c68bSclaudio 5693922c68bSclaudio if (!nbr_adj_ok(nbr)) { 5703922c68bSclaudio nbr->state = NBR_STA_2_WAY; 5713922c68bSclaudio return (0); 5723922c68bSclaudio } 5733922c68bSclaudio 5743922c68bSclaudio nbr->state = NBR_STA_XSTRT; 5754d267a96Sclaudio nbr->dd_master = 1; 576204df0f8Sclaudio nbr->dd_seq_num += arc4random() & 0xffff; 577299d99d9Sclaudio nbr->dd_pending = 0; 578204df0f8Sclaudio 5793922c68bSclaudio /* initial db negotiation */ 5803922c68bSclaudio start_db_tx_timer(nbr); 5813922c68bSclaudio 5821ccc5a96Snorby nbr_start_adj_timer(nbr); 5831ccc5a96Snorby 5843922c68bSclaudio return (0); 585204df0f8Sclaudio } 586204df0f8Sclaudio 587204df0f8Sclaudio int 588204df0f8Sclaudio nbr_act_delete(struct nbr *nbr) 589204df0f8Sclaudio { 59037cea71bSnorby struct timeval tv; 59137cea71bSnorby 59247d3fe48Sclaudio if (nbr == nbr->iface->self) { 59347d3fe48Sclaudio nbr->dr.s_addr = 0; 59447d3fe48Sclaudio nbr->bdr.s_addr = 0; 59535277385Sclaudio return (0); 59647d3fe48Sclaudio } 59735277385Sclaudio 598204df0f8Sclaudio /* stop timers */ 5993aede346Sclaudio nbr_stop_itimer(nbr); 600204df0f8Sclaudio 601204df0f8Sclaudio /* clear dr and bdr */ 602204df0f8Sclaudio nbr->dr.s_addr = 0; 603204df0f8Sclaudio nbr->bdr.s_addr = 0; 60447d3fe48Sclaudio /* XXX reset crypt_seq_num will allow replay attacks. */ 60503431b74Snorby nbr->crypt_seq_num = 0; 60603431b74Snorby 60737cea71bSnorby /* schedule kill timer */ 60837cea71bSnorby timerclear(&tv); 60937cea71bSnorby tv.tv_sec = DEFAULT_NBR_TMOUT; 61037cea71bSnorby 61137cea71bSnorby if (evtimer_add(&nbr->inactivity_timer, &tv)) { 61237cea71bSnorby log_warnx("nbr_act_delete: error scheduling neighbor ID %s " 61337cea71bSnorby "for removal", inet_ntoa(nbr->id)); 61437cea71bSnorby } 61537cea71bSnorby 616204df0f8Sclaudio return (nbr_act_clear_lists(nbr)); 617204df0f8Sclaudio } 618204df0f8Sclaudio 619204df0f8Sclaudio int 620204df0f8Sclaudio nbr_act_clear_lists(struct nbr *nbr) 621204df0f8Sclaudio { 6223aede346Sclaudio /* stop timers */ 6233aede346Sclaudio stop_db_tx_timer(nbr); 6243aede346Sclaudio stop_ls_req_tx_timer(nbr); 625204df0f8Sclaudio 626204df0f8Sclaudio /* clear lists */ 627204df0f8Sclaudio ls_retrans_list_clr(nbr); 628204df0f8Sclaudio db_sum_list_clr(nbr); 629204df0f8Sclaudio ls_req_list_clr(nbr); 630204df0f8Sclaudio 631204df0f8Sclaudio return (0); 632204df0f8Sclaudio } 633204df0f8Sclaudio 634204df0f8Sclaudio int 635204df0f8Sclaudio nbr_act_hello_check(struct nbr *nbr) 636204df0f8Sclaudio { 637204df0f8Sclaudio log_debug("nbr_act_hello_check: neighbor ID %s", inet_ntoa(nbr->id)); 638204df0f8Sclaudio 639204df0f8Sclaudio return (-1); 640204df0f8Sclaudio } 641204df0f8Sclaudio 642204df0f8Sclaudio struct ctl_nbr * 643204df0f8Sclaudio nbr_to_ctl(struct nbr *nbr) 644204df0f8Sclaudio { 645204df0f8Sclaudio static struct ctl_nbr nctl; 646204df0f8Sclaudio struct timeval tv, now, res; 647204df0f8Sclaudio struct lsa_entry *le; 648204df0f8Sclaudio 649204df0f8Sclaudio memcpy(nctl.name, nbr->iface->name, sizeof(nctl.name)); 650204df0f8Sclaudio memcpy(&nctl.id, &nbr->id, sizeof(nctl.id)); 651d13813cbSclaudio memcpy(&nctl.addr, &nbr->addr, sizeof(nctl.addr)); 652204df0f8Sclaudio memcpy(&nctl.dr, &nbr->dr, sizeof(nctl.dr)); 653204df0f8Sclaudio memcpy(&nctl.bdr, &nbr->bdr, sizeof(nctl.bdr)); 654204df0f8Sclaudio memcpy(&nctl.area, &nbr->iface->area->id, sizeof(nctl.area)); 655204df0f8Sclaudio 656204df0f8Sclaudio /* this list is 99% of the time empty so that's OK for now */ 657204df0f8Sclaudio nctl.db_sum_lst_cnt = 0; 658204df0f8Sclaudio TAILQ_FOREACH(le, &nbr->db_sum_list, entry) 659204df0f8Sclaudio nctl.db_sum_lst_cnt++; 660204df0f8Sclaudio 661204df0f8Sclaudio nctl.ls_req_lst_cnt = nbr->ls_req_cnt; 6621ba81fefSnorby nctl.ls_retrans_lst_cnt = nbr->ls_ret_cnt; 663204df0f8Sclaudio 664204df0f8Sclaudio nctl.nbr_state = nbr->state; 665944ca59cSclaudio 666944ca59cSclaudio /* 667944ca59cSclaudio * We need to trick a bit to show the remote iface state. 668944ca59cSclaudio * The idea is to print DR, BDR or DROther dependent on 669944ca59cSclaudio * the type of the neighbor. 670944ca59cSclaudio */ 671944ca59cSclaudio if (nbr->iface->dr == nbr) 672944ca59cSclaudio nctl.iface_state = IF_STA_DR; 673944ca59cSclaudio else if (nbr->iface->bdr == nbr) 674944ca59cSclaudio nctl.iface_state = IF_STA_BACKUP; 675944ca59cSclaudio else if (nbr->iface->state & IF_STA_MULTI) 676944ca59cSclaudio nctl.iface_state = IF_STA_DROTHER; 677944ca59cSclaudio else 678204df0f8Sclaudio nctl.iface_state = nbr->iface->state; 679204df0f8Sclaudio 680204df0f8Sclaudio nctl.state_chng_cnt = nbr->stats.sta_chng; 681204df0f8Sclaudio 682204df0f8Sclaudio nctl.priority = nbr->priority; 683097ed198Sclaudio nctl.options = nbr->options | nbr->capa_options; 684204df0f8Sclaudio 685204df0f8Sclaudio gettimeofday(&now, NULL); 686204df0f8Sclaudio if (evtimer_pending(&nbr->inactivity_timer, &tv)) { 687204df0f8Sclaudio timersub(&tv, &now, &res); 688c843cd3cSclaudio if (nbr->state & NBR_STA_DOWN) 689c843cd3cSclaudio nctl.dead_timer = DEFAULT_NBR_TMOUT - res.tv_sec; 690c843cd3cSclaudio else 691204df0f8Sclaudio nctl.dead_timer = res.tv_sec; 692204df0f8Sclaudio } else 693204df0f8Sclaudio nctl.dead_timer = 0; 694204df0f8Sclaudio 695129e6b5fSnorby if (nbr->state == NBR_STA_FULL) { 696129e6b5fSnorby nctl.uptime = now.tv_sec - nbr->uptime; 697129e6b5fSnorby } else 698129e6b5fSnorby nctl.uptime = 0; 699129e6b5fSnorby 700204df0f8Sclaudio return (&nctl); 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