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/* $OpenBSD: ospfe.h,v 1.7 2005/03/07 10:28:14 claudio Exp $ */
/*
* Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _OSPFE_H_
#define _OSPFE_H_
#define max(x,y) ((x) > (y) ? (x) : (y))
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
TAILQ_HEAD(ctl_conns, ctl_conn) ctl_conns;
/* neighbor states */
#define NBR_STA_DOWN 0x0001
#define NBR_STA_ATTEMPT 0x0002
#define NBR_STA_INIT 0x0004
#define NBR_STA_2_WAY 0x0008
#define NBR_STA_XSTRT 0x0010
#define NBR_STA_SNAP 0x0020
#define NBR_STA_XCHNG 0x0040
#define NBR_STA_LOAD 0x0080
#define NBR_STA_FULL 0x0100
#define NBR_STA_ACTIVE (~NBR_STA_DOWN)
#define NBR_STA_FLOOD (NBR_STA_XCHNG | NBR_STA_LOAD | NBR_STA_FULL)
#define NBR_STA_ADJFORM (NBR_STA_XSTRT | NBR_STA_SNAP | NBR_STA_FLOOD)
#define NBR_STA_BIDIR (NBR_STA_2_WAY | NBR_STA_ADJFORM)
#define NBR_STA_PRELIM (NBR_STA_DOWN | NBR_STA_ATTEMPT | NBR_STA_INIT)
#define NBR_STA_ANY 0xffff
/* neighbor events */
enum nbr_event {
NBR_EVT_NOTHING,
NBR_EVT_HELLO_RCVD,
NBR_EVT_STRT,
NBR_EVT_2_WAY_RCVD,
NBR_EVT_NEG_DONE,
NBR_EVT_SNAP_DONE,
NBR_EVT_XCHNG_DONE,
NBR_EVT_BAD_LS_REQ,
NBR_EVT_LOAD_DONE,
NBR_EVT_ADJ_OK,
NBR_EVT_SEQ_NUM_MIS,
NBR_EVT_1_WAY_RCVD,
NBR_EVT_KILL_NBR,
NBR_EVT_ITIMER,
NBR_EVT_LL_DOWN,
NBR_EVT_ADJTMOUT
};
/* neighbor actions */
enum nbr_action {
NBR_ACT_NOTHING,
NBR_ACT_STRT,
NBR_ACT_RST_ITIMER,
NBR_ACT_STRT_ITIMER,
NBR_ACT_EVAL,
NBR_ACT_SNAP,
NBR_ACT_SNAP_DONE,
NBR_ACT_XCHNG_DONE,
NBR_ACT_ADJ_OK,
NBR_ACT_RESTRT_DD,
NBR_ACT_DEL,
NBR_ACT_CLR_LST,
NBR_ACT_HELLO_CHK
};
struct lsa_entry {
TAILQ_ENTRY(lsa_entry) entry;
union {
struct lsa_hdr *lu_lsa;
struct lsa_ref *lu_ref;
} le_data;
};
#define le_lsa le_data.lu_lsa
#define le_ref le_data.lu_ref
struct lsa_ref {
LIST_ENTRY(lsa_ref) entry;
struct lsa_hdr hdr;
void *data;
time_t stamp;
int refcnt;
u_int16_t len;
};
struct nbr_stats {
u_int32_t sta_chng;
};
struct nbr {
LIST_ENTRY(nbr) entry, hash;
struct event inactivity_timer;
struct event db_tx_timer;
struct event lsreq_tx_timer;
struct event adj_timer;
struct nbr_stats stats;
struct lsa_head ls_retrans_list;
struct lsa_head db_sum_list;
struct lsa_head ls_req_list;
struct in_addr addr;
struct in_addr id;
struct in_addr dr; /* designated router */
struct in_addr bdr; /* backup designated router */
struct iface *iface;
struct lsa_entry *ls_req;
struct lsa_entry *dd_end;
u_int32_t dd_seq_num;
u_int32_t dd_pending;
u_int32_t peerid; /* unique ID in DB */
u_int32_t ls_req_cnt;
int state;
u_int8_t link_state;
u_int8_t priority;
u_int8_t options;
u_int8_t last_rx_options;
u_int8_t last_rx_bits;
bool master;
};
/* auth.c */
int auth_validate(struct ospf_hdr *, const struct iface *);
int auth_gen(void *, u_int16_t, const struct iface *);
/* database.c */
int send_db_description(struct nbr *);
void recv_db_description(struct nbr *, char *, u_int16_t);
void db_sum_list_add(struct nbr *, struct lsa_hdr *);
int db_sum_list_del(struct nbr *, struct lsa_hdr *);
void db_sum_list_clr(struct nbr *);
void db_tx_timer(int, short, void *);
int start_db_tx_timer(struct nbr *);
int stop_db_tx_timer(struct nbr *);
/* hello.c */
int send_hello(struct iface *);
void recv_hello(struct iface *, struct in_addr, u_int32_t,
char *, u_int16_t);
/* ospfe.c */
pid_t ospfe(struct ospfd_conf *, int[2], int[2], int[2]);
void ospfe_dispatch_main(int, short, void *);
void ospfe_dispatch_rde(int, short, void *);
int ospfe_imsg_compose_parent(int, pid_t, void *, u_int16_t);
int ospfe_imsg_compose_rde(int, u_int32_t, pid_t, void *,
u_int16_t);
u_int32_t ospfe_router_id(void);
void ospfe_iface_ctl(struct ctl_conn *, unsigned int);
void ospfe_nbr_ctl(struct ctl_conn *);
void orig_rtr_lsa(struct area *);
void orig_net_lsa(struct iface *);
/* interface.c */
int if_fsm(struct iface *, enum iface_event);
struct iface *if_new(struct kif *);
int if_del(struct iface *);
int if_init(struct ospfd_conf *);
int if_shutdown(struct ospfd_conf *);
int if_act_start(struct iface *);
int if_act_elect(struct iface *);
int if_act_reset(struct iface *);
struct ctl_iface *if_to_ctl(struct iface *);
const char *if_state_name(int);
const char *if_event_name(int);
const char *if_action_name(int);
const char *if_type_name(int);
const char *if_auth_name(int);
int if_join_group(struct iface *, struct in_addr *);
int if_leave_group(struct iface *, struct in_addr *);
int if_set_mcast(struct iface *);
/* lsack.c */
int delay_lsa_ack(struct iface *, struct lsa_hdr *);
int send_ls_ack(struct iface *, struct in_addr, void *data, int len);
void recv_ls_ack(struct nbr *, char *, u_int16_t);
int lsa_hdr_check(struct nbr *, struct lsa_hdr *);
void ls_ack_list_add(struct iface *, struct lsa_hdr *);
void ls_ack_list_free(struct iface *, struct lsa_entry *);
void ls_ack_list_clr(struct iface *);
bool ls_ack_list_empty(struct iface *);
void ls_ack_tx_timer(int, short, void *);
int start_ls_ack_tx_timer(struct iface *);
int stop_ls_ack_tx_timer(struct iface *);
/* lsreq.c */
int send_ls_req(struct nbr *);
void recv_ls_req(struct nbr *, char *, u_int16_t);
void ls_req_list_add(struct nbr *, struct lsa_hdr *);
int ls_req_list_del(struct nbr *, struct lsa_hdr *);
struct lsa_entry *ls_req_list_get(struct nbr *, struct lsa_hdr *);
void ls_req_list_free(struct nbr *, struct lsa_entry *);
void ls_req_list_clr(struct nbr *);
bool ls_req_list_empty(struct nbr *);
void ls_req_tx_timer(int, short, void *);
int start_ls_req_tx_timer(struct nbr *);
int stop_ls_req_tx_timer(struct nbr *);
/* lsupdate.c */
int lsa_flood(struct iface *, struct nbr *, struct lsa_hdr *,
void *, u_int16_t);
int send_ls_update(struct iface *, struct in_addr, void *, int);
void recv_ls_update(struct nbr *, char *, u_int16_t);
int ls_retrans_list_add(struct nbr *, struct lsa_hdr *);
int ls_retrans_list_del(struct nbr *, struct lsa_hdr *);
struct lsa_entry *ls_retrans_list_get(struct nbr *, struct lsa_hdr *);
void ls_retrans_list_free(struct nbr *, struct lsa_entry *);
void ls_retrans_list_clr(struct nbr *);
bool ls_retrans_list_empty(struct nbr *);
void lsa_cache_init(u_int32_t);
struct lsa_ref *lsa_cache_add(void *, u_int16_t);
struct lsa_ref *lsa_cache_get(struct lsa_hdr *);
void lsa_cache_put(struct lsa_ref *, struct nbr *);
/* neighbor.c */
void nbr_init(u_int32_t);
struct nbr *nbr_new(u_int32_t, struct iface *, int);
int nbr_del(struct nbr *);
struct nbr *nbr_find_id(struct iface *, u_int32_t);
struct nbr *nbr_find_peerid(u_int32_t);
int nbr_fsm(struct nbr *, enum nbr_event);
void nbr_itimer(int, short, void *);
int nbr_start_itimer(struct nbr *);
int nbr_stop_itimer(struct nbr *);
int nbr_reset_itimer(struct nbr *);
void nbr_adj_timer(int, short, void *);
int nbr_start_adj_timer(struct nbr *);
int nbr_act_start(struct nbr *);
int nbr_act_reset_itimer(struct nbr *);
int nbr_act_start_itimer(struct nbr *);
int nbr_act_eval(struct nbr *);
int nbr_act_snapshot(struct nbr *);
int nbr_act_exchange_done(struct nbr *);
int nbr_act_adj_ok(struct nbr *);
int nbr_act_restart_dd(struct nbr *);
int nbr_act_delete(struct nbr *);
int nbr_act_clear_lists(struct nbr *);
int nbr_act_hello_check(struct nbr *);
struct ctl_nbr *nbr_to_ctl(struct nbr *);
const char *nbr_state_name(int);
const char *nbr_event_name(int);
const char *nbr_action_name(int);
struct lsa_hdr *lsa_hdr_new(void);
/* packet.c */
void gen_ospf_hdr(void *, struct iface *, u_int8_t);
int send_packet(struct iface *, char *, int, struct sockaddr_in *);
void recv_packet(int, short, void *);
#endif /* _OSPFE_H_ */
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