1 /* $OpenBSD: area.c,v 1.5 2019/12/23 07:33:49 denis Exp $ */ 2 3 /* 4 * Copyright (c) 2004, 2005, 2007 Esben Norby <norby@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/types.h> 20 #include <sys/tree.h> 21 22 #include <err.h> 23 #include <stdlib.h> 24 25 #include "ospf6.h" 26 #include "ospf6d.h" 27 #include "ospfe.h" 28 #include "rde.h" 29 #include "log.h" 30 31 struct area * 32 area_new(void) 33 { 34 struct area *area = NULL; 35 36 if ((area = calloc(1, sizeof(*area))) == NULL) 37 errx(1, "area_new: calloc"); 38 39 LIST_INIT(&area->iface_list); 40 LIST_INIT(&area->nbr_list); 41 RB_INIT(&area->lsa_tree); 42 43 return (area); 44 } 45 46 int 47 area_del(struct area *area) 48 { 49 struct iface *iface = NULL; 50 struct vertex *v, *nv; 51 struct rde_nbr *n; 52 53 /* area is removed so neutralize the demotion done by the area */ 54 if (area->active == 0) 55 ospfe_demote_area(area, 1); 56 57 /* clean lists */ 58 while ((iface = LIST_FIRST(&area->iface_list)) != NULL) { 59 LIST_REMOVE(iface, entry); 60 if_del(iface); 61 } 62 63 while ((n = LIST_FIRST(&area->nbr_list)) != NULL) 64 rde_nbr_del(n); 65 66 for (v = RB_MIN(lsa_tree, &area->lsa_tree); v != NULL; v = nv) { 67 nv = RB_NEXT(lsa_tree, &area->lsa_tree, v); 68 vertex_free(v); 69 } 70 71 free(area); 72 73 return (0); 74 } 75 76 struct area * 77 area_find(struct ospfd_conf *conf, struct in_addr area_id) 78 { 79 struct area *area; 80 81 LIST_FOREACH(area, &conf->area_list, entry) { 82 if (area->id.s_addr == area_id.s_addr) { 83 return (area); 84 } 85 } 86 87 return (NULL); 88 } 89 90 void 91 area_track(struct area *area) 92 { 93 int old = area->active; 94 struct iface *iface; 95 96 area->active = 0; 97 LIST_FOREACH(iface, &area->iface_list, entry) { 98 if (iface->state & IF_STA_DOWN) 99 continue; 100 area->active = 1; 101 break; 102 } 103 104 if (area->active != old) { 105 ospfe_imsg_compose_rde(IMSG_AREA_CHANGE, area->id.s_addr, 0, 106 &area->active, sizeof(area->active)); 107 ospfe_demote_area(area, old == 0); 108 } 109 } 110 111 int 112 area_border_router(struct ospfd_conf *conf) 113 { 114 struct area *area; 115 int active = 0; 116 117 LIST_FOREACH(area, &conf->area_list, entry) 118 if (area->active) 119 active++; 120 121 return (active > 1); 122 } 123 124 u_int32_t 125 area_ospf_options(struct area *area) 126 { 127 u_int32_t opt = OSPF_OPTION_V6 | OSPF_OPTION_R; 128 129 if (area && !area->stub) 130 opt |= OSPF_OPTION_E; 131 132 return (opt); 133 } 134