1 /* 2 * OSPF Neighbor functions. 3 * Copyright (C) 1999, 2000 Toshiaki Takada 4 * 5 * This file is part of GNU Zebra. 6 * 7 * GNU Zebra is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published 9 * by the Free Software Foundation; either version 2, or (at your 10 * option) any later version. 11 * 12 * GNU Zebra is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License along 18 * with this program; see the file COPYING; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22 #ifndef _ZEBRA_OSPF_NEIGHBOR_H 23 #define _ZEBRA_OSPF_NEIGHBOR_H 24 25 #include <ospfd/ospf_packet.h> 26 27 /* Neighbor Data Structure */ 28 struct ospf_neighbor { 29 /* This neighbor's parent ospf interface. */ 30 struct ospf_interface *oi; 31 32 /* OSPF neighbor Information */ 33 uint8_t state; /* NSM status. */ 34 uint8_t dd_flags; /* DD bit flags. */ 35 uint32_t dd_seqnum; /* DD Sequence Number. */ 36 37 /* Neighbor Information from Hello. */ 38 struct prefix address; /* Neighbor Interface Address. */ 39 40 struct in_addr src; /* Src address. */ 41 struct in_addr router_id; /* Router ID. */ 42 uint8_t options; /* Options. */ 43 int priority; /* Router Priority. */ 44 struct in_addr d_router; /* Designated Router. */ 45 struct in_addr bd_router; /* Backup Designated Router. */ 46 47 /* Last sent Database Description packet. */ 48 struct ospf_packet *last_send; 49 /* Timestemp when last Database Description packet was sent */ 50 struct timeval last_send_ts; 51 52 /* Last received Databse Description packet. */ 53 struct { 54 uint8_t options; 55 uint8_t flags; 56 uint32_t dd_seqnum; 57 } last_recv; 58 59 /* LSA data. */ 60 struct ospf_lsdb ls_rxmt; 61 struct ospf_lsdb db_sum; 62 struct ospf_lsdb ls_req; 63 struct ospf_lsa *ls_req_last; 64 65 uint32_t crypt_seqnum; /* Cryptographic Sequence Number. */ 66 67 /* Timer values. */ 68 uint32_t v_inactivity; 69 uint32_t v_db_desc; 70 uint32_t v_ls_req; 71 uint32_t v_ls_upd; 72 73 /* Threads. */ 74 struct thread *t_inactivity; 75 struct thread *t_db_desc; 76 struct thread *t_ls_req; 77 struct thread *t_ls_upd; 78 struct thread *t_hello_reply; 79 80 /* NBMA configured neighbour */ 81 struct ospf_nbr_nbma *nbr_nbma; 82 83 /* Statistics */ 84 struct timeval ts_last_progress; /* last advance of NSM */ 85 struct timeval ts_last_regress; /* last regressive NSM change */ 86 const char *last_regress_str; /* Event which last regressed NSM */ 87 uint32_t state_change; /* NSM state change counter */ 88 89 /* BFD information */ 90 void *bfd_info; 91 }; 92 93 /* Macros. */ 94 #define NBR_IS_DR(n) IPV4_ADDR_SAME (&n->address.u.prefix4, &n->d_router) 95 #define NBR_IS_BDR(n) IPV4_ADDR_SAME (&n->address.u.prefix4, &n->bd_router) 96 97 /* Prototypes. */ 98 extern struct ospf_neighbor *ospf_nbr_new(struct ospf_interface *); 99 extern void ospf_nbr_free(struct ospf_neighbor *); 100 extern void ospf_nbr_delete(struct ospf_neighbor *); 101 extern int ospf_nbr_bidirectional(struct in_addr *, struct in_addr *, int); 102 extern void ospf_nbr_self_reset(struct ospf_interface *, struct in_addr); 103 extern void ospf_nbr_add_self(struct ospf_interface *, struct in_addr); 104 extern int ospf_nbr_count(struct ospf_interface *, int); 105 extern int ospf_nbr_count_opaque_capable(struct ospf_interface *); 106 extern struct ospf_neighbor *ospf_nbr_get(struct ospf_interface *, 107 struct ospf_header *, struct ip *, 108 struct prefix *); 109 extern struct ospf_neighbor *ospf_nbr_lookup(struct ospf_interface *, 110 struct ip *, struct ospf_header *); 111 extern struct ospf_neighbor *ospf_nbr_lookup_by_addr(struct route_table *, 112 struct in_addr *); 113 extern struct ospf_neighbor *ospf_nbr_lookup_by_routerid(struct route_table *, 114 struct in_addr *); 115 extern void ospf_renegotiate_optional_capabilities(struct ospf *top); 116 117 #endif /* _ZEBRA_OSPF_NEIGHBOR_H */ 118