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/* $OpenBSD: session.h,v 1.96 2008/05/08 06:52:13 henning Exp $ */
/*
* Copyright (c) 2003, 2004 Henning Brauer <henning@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.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <time.h>
#define MAX_BACKLOG 5
#define INTERVAL_CONNECTRETRY 120
#define INTERVAL_HOLD_INITIAL 240
#define INTERVAL_HOLD 90
#define INTERVAL_IDLE_HOLD_INITIAL 30
#define INTERVAL_HOLD_CLONED 3600
#define INTERVAL_HOLD_DEMOTED 60
#define MAX_IDLE_HOLD 3600
#define MSGSIZE_HEADER 19
#define MSGSIZE_HEADER_MARKER 16
#define MSGSIZE_NOTIFICATION_MIN 21 /* 19 hdr + 1 code + 1 sub */
#define MSGSIZE_OPEN_MIN 29
#define MSGSIZE_UPDATE_MIN 23
#define MSGSIZE_KEEPALIVE MSGSIZE_HEADER
#define MSGSIZE_RREFRESH MSGSIZE_HEADER + 4
#define MSG_PROCESS_LIMIT 25
#define SESSION_CLEAR_DELAY 5
enum session_state {
STATE_NONE,
STATE_IDLE,
STATE_CONNECT,
STATE_ACTIVE,
STATE_OPENSENT,
STATE_OPENCONFIRM,
STATE_ESTABLISHED
};
enum session_events {
EVNT_NONE,
EVNT_START,
EVNT_STOP,
EVNT_CON_OPEN,
EVNT_CON_CLOSED,
EVNT_CON_OPENFAIL,
EVNT_CON_FATAL,
EVNT_TIMER_CONNRETRY,
EVNT_TIMER_HOLDTIME,
EVNT_TIMER_KEEPALIVE,
EVNT_RCVD_OPEN,
EVNT_RCVD_KEEPALIVE,
EVNT_RCVD_UPDATE,
EVNT_RCVD_NOTIFICATION
};
enum blockmodes {
BM_NORMAL,
BM_NONBLOCK
};
enum msg_type {
OPEN = 1,
UPDATE,
NOTIFICATION,
KEEPALIVE,
RREFRESH
};
enum suberr_header {
ERR_HDR_SYNC = 1,
ERR_HDR_LEN,
ERR_HDR_TYPE
};
enum suberr_open {
ERR_OPEN_VERSION = 1,
ERR_OPEN_AS,
ERR_OPEN_BGPID,
ERR_OPEN_OPT,
ERR_OPEN_AUTH,
ERR_OPEN_HOLDTIME,
ERR_OPEN_CAPA
};
enum opt_params {
OPT_PARAM_NONE,
OPT_PARAM_AUTH,
OPT_PARAM_CAPABILITIES
};
enum capa_codes {
CAPA_NONE,
CAPA_MP,
CAPA_REFRESH,
CAPA_RESTART = 64,
CAPA_AS4BYTE = 65
};
struct bgp_msg {
struct buf *buf;
enum msg_type type;
u_int16_t len;
};
struct msg_header {
u_char marker[MSGSIZE_HEADER_MARKER];
u_int16_t len;
u_int8_t type;
};
struct msg_open {
struct msg_header header;
u_int32_t bgpid;
u_int16_t myas;
u_int16_t holdtime;
u_int8_t version;
u_int8_t optparamlen;
};
struct bgpd_sysdep {
u_int8_t no_pfkey;
u_int8_t no_md5sig;
};
struct ctl_conn {
TAILQ_ENTRY(ctl_conn) entry;
struct imsgbuf ibuf;
int restricted;
};
TAILQ_HEAD(ctl_conns, ctl_conn) ctl_conns;
struct peer_stats {
u_int64_t msg_rcvd_open;
u_int64_t msg_rcvd_update;
u_int64_t msg_rcvd_notification;
u_int64_t msg_rcvd_keepalive;
u_int64_t msg_rcvd_rrefresh;
u_int64_t msg_sent_open;
u_int64_t msg_sent_update;
u_int64_t msg_sent_notification;
u_int64_t msg_sent_keepalive;
u_int64_t msg_sent_rrefresh;
u_int64_t prefix_rcvd_update;
u_int64_t prefix_rcvd_withdraw;
u_int64_t prefix_sent_update;
u_int64_t prefix_sent_withdraw;
time_t last_updown;
time_t last_read;
u_int32_t prefix_cnt;
u_int8_t last_sent_errcode;
u_int8_t last_sent_suberr;
};
enum Timer {
Timer_None,
Timer_ConnectRetry,
Timer_Keepalive,
Timer_Hold,
Timer_IdleHold,
Timer_IdleHoldReset,
Timer_Max
};
struct peer_timer {
TAILQ_ENTRY(peer_timer) entry;
enum Timer type;
time_t val;
};
TAILQ_HEAD(peer_timer_head, peer_timer);
struct peer {
struct peer_config conf;
struct peer_stats stats;
struct {
struct capabilities ann;
struct capabilities peer;
} capa;
struct {
struct bgpd_addr local_addr;
u_int32_t spi_in;
u_int32_t spi_out;
enum auth_method method;
u_int8_t established;
} auth;
struct sockaddr_storage sa_local;
struct sockaddr_storage sa_remote;
struct peer_timer_head timers;
struct msgbuf wbuf;
struct buf_read *rbuf;
struct peer *next;
int fd;
int lasterr;
u_int errcnt;
u_int IdleHoldTime;
u_int32_t remote_bgpid;
enum session_state state;
enum session_state prev_state;
u_int16_t short_as;
u_int16_t holdtime;
u_int8_t depend_ok;
u_int8_t demoted;
u_int8_t passive;
};
struct peer *peers;
struct ctl_timer {
enum Timer type;
time_t val;
};
/* session.c */
void session_socket_blockmode(int, enum blockmodes);
pid_t session_main(struct bgpd_config *, struct peer *,
struct network_head *, struct filter_head *,
struct mrt_head *, int[2], int[2], int[2], int[2]);
void bgp_fsm(struct peer *, enum session_events);
int session_neighbor_rrefresh(struct peer *p);
struct peer *getpeerbyaddr(struct bgpd_addr *);
struct peer *getpeerbydesc(const char *);
int imsg_compose_parent(int, pid_t, void *, u_int16_t);
int imsg_compose_rde(int, pid_t, void *, u_int16_t);
/* log.c */
char *log_fmt_peer(const struct peer_config *);
void log_statechange(struct peer *, enum session_state,
enum session_events);
void log_notification(const struct peer *, u_int8_t, u_int8_t,
u_char *, u_int16_t);
void log_conn_attempt(const struct peer *, struct sockaddr *);
/* parse.y */
int parse_config(char *, struct bgpd_config *, struct mrt_head *,
struct peer **, struct network_head *, struct filter_head *);
/* config.c */
int merge_config(struct bgpd_config *, struct bgpd_config *,
struct peer *, struct listen_addrs *);
void prepare_listeners(struct bgpd_config *);
/* rde.c */
pid_t rde_main(struct bgpd_config *, struct peer *, struct network_head *,
struct filter_head *, struct mrt_head *, int[2], int[2], int[2],
int[2], int);
/* control.c */
int control_init(int, char *);
int control_listen(int);
void control_shutdown(int);
int control_dispatch_msg(struct pollfd *, u_int *);
unsigned int control_accept(int, int);
/* pfkey.c */
int pfkey_establish(struct peer *);
int pfkey_remove(struct peer *);
int pfkey_init(struct bgpd_sysdep *);
/* printconf.c */
void print_config(struct bgpd_config *, struct network_head *, struct peer *,
struct filter_head *, struct mrt_head *);
/* carp.c */
int carp_demote_init(char *, int);
void carp_demote_shutdown(void);
int carp_demote_get(char *);
int carp_demote_set(char *, int);
/* timer.c */
struct peer_timer *timer_get(struct peer *, enum Timer);
int timer_due(struct peer *, enum Timer);
time_t timer_nextduein(struct peer *);
int timer_running(struct peer *, enum Timer, time_t *);
void timer_set(struct peer *, enum Timer, u_int);
void timer_stop(struct peer *, enum Timer);
void timer_remove(struct peer *, enum Timer);
void timer_remove_all(struct peer *);
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