Return to session.h CVS log

Up to [local] / src / usr.sbin / bgpd

provide timer_nextduein, which provides the number of seconds until the
next timer expires.
use that in the session engine's mainloop, which simplifies it and
removes the last bits of timer internals knowledge from anywhere outside
timer.c.

/*	$OpenBSD: session.h,v 1.95 2007/12/23 18:56:17 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;
};

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 msgbuf		 wbuf;
	struct buf_read		*rbuf;
	struct peer		*next;
	time_t			 ConnectRetryTimer;
	time_t			 KeepaliveTimer;
	time_t			 HoldTimer;
	time_t			 IdleHoldTimer;
	time_t			 IdleHoldResetTimer;
	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;

enum Timer {
	Timer_None,
	Timer_ConnectRetry,
	Timer_Keepalive,
	Timer_Hold,
	Timer_IdleHold,
	Timer_IdleHoldReset,
	Timer_Max
};

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 */
time_t		*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);