sm_statetable.c

在linux环境下的流控制传输协议（sctp）的源代码

	TYPE_SCTP_FUNC(sctp_sf_do_prm_requestheartbeat),          \
	/* SCTP_STATE_SHUTDOWN_ACK_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_do_prm_requestheartbeat),          \
} /* TYPE_SCTP_PRIMITIVE_REQUESTHEARTBEAT */

#define TYPE_SCTP_PRIMITIVE_ASCONF { \
	/* SCTP_STATE_EMPTY */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_CLOSED */ \
	TYPE_SCTP_FUNC(sctp_sf_error_closed), \
	/* SCTP_STATE_COOKIE_WAIT */ \
	TYPE_SCTP_FUNC(sctp_sf_error_closed), \
	/* SCTP_STATE_COOKIE_ECHOED */ \
	TYPE_SCTP_FUNC(sctp_sf_error_closed), \
	/* SCTP_STATE_ESTABLISHED */ \
	TYPE_SCTP_FUNC(sctp_sf_do_prm_asconf), \
	/* SCTP_STATE_SHUTDOWN_PENDING */ \
	TYPE_SCTP_FUNC(sctp_sf_do_prm_asconf), \
	/* SCTP_STATE_SHUTDOWN_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_do_prm_asconf), \
	/* SCTP_STATE_SHUTDOWN_RECEIVED */ \
	TYPE_SCTP_FUNC(sctp_sf_do_prm_asconf), \
	/* SCTP_STATE_SHUTDOWN_ACK_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_error_shutdown), \
} /* TYPE_SCTP_PRIMITIVE_REQUESTHEARTBEAT */

/* The primary index for this table is the primitive type.
 * The secondary index for this table is the state.
 */
static const sctp_sm_table_entry_t primitive_event_table[SCTP_NUM_PRIMITIVE_TYPES][SCTP_STATE_NUM_STATES] = {
	TYPE_SCTP_PRIMITIVE_ASSOCIATE,
	TYPE_SCTP_PRIMITIVE_SHUTDOWN,
	TYPE_SCTP_PRIMITIVE_ABORT,
	TYPE_SCTP_PRIMITIVE_SEND,
	TYPE_SCTP_PRIMITIVE_REQUESTHEARTBEAT,
	TYPE_SCTP_PRIMITIVE_ASCONF,
};

#define TYPE_SCTP_OTHER_NO_PENDING_TSN  { \
	/* SCTP_STATE_EMPTY */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_CLOSED */ \
	TYPE_SCTP_FUNC(sctp_sf_ignore_other), \
	/* SCTP_STATE_COOKIE_WAIT */ \
	TYPE_SCTP_FUNC(sctp_sf_ignore_other), \
	/* SCTP_STATE_COOKIE_ECHOED */ \
	TYPE_SCTP_FUNC(sctp_sf_ignore_other), \
	/* SCTP_STATE_ESTABLISHED */ \
	TYPE_SCTP_FUNC(sctp_sf_ignore_other), \
	/* SCTP_STATE_SHUTDOWN_PENDING */ \
	TYPE_SCTP_FUNC(sctp_sf_do_9_2_start_shutdown), \
	/* SCTP_STATE_SHUTDOWN_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_ignore_other), \
	/* SCTP_STATE_SHUTDOWN_RECEIVED */ \
	TYPE_SCTP_FUNC(sctp_sf_do_9_2_shutdown_ack), \
	/* SCTP_STATE_SHUTDOWN_ACK_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_ignore_other), \
}

#define TYPE_SCTP_OTHER_ICMP_PROTO_UNREACH  { \
	/* SCTP_STATE_EMPTY */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_CLOSED */ \
	TYPE_SCTP_FUNC(sctp_sf_ignore_other), \
	/* SCTP_STATE_COOKIE_WAIT */ \
	TYPE_SCTP_FUNC(sctp_sf_cookie_wait_icmp_abort), \
	/* SCTP_STATE_COOKIE_ECHOED */ \
	TYPE_SCTP_FUNC(sctp_sf_ignore_other), \
	/* SCTP_STATE_ESTABLISHED */ \
	TYPE_SCTP_FUNC(sctp_sf_ignore_other), \
	/* SCTP_STATE_SHUTDOWN_PENDING */ \
	TYPE_SCTP_FUNC(sctp_sf_ignore_other), \
	/* SCTP_STATE_SHUTDOWN_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_ignore_other), \
	/* SCTP_STATE_SHUTDOWN_RECEIVED */ \
	TYPE_SCTP_FUNC(sctp_sf_ignore_other), \
	/* SCTP_STATE_SHUTDOWN_ACK_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_ignore_other), \
}

static const sctp_sm_table_entry_t other_event_table[SCTP_NUM_OTHER_TYPES][SCTP_STATE_NUM_STATES] = {
	TYPE_SCTP_OTHER_NO_PENDING_TSN,
	TYPE_SCTP_OTHER_ICMP_PROTO_UNREACH,
};

#define TYPE_SCTP_EVENT_TIMEOUT_NONE { \
	/* SCTP_STATE_EMPTY */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_CLOSED */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_COOKIE_WAIT */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_COOKIE_ECHOED */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_ESTABLISHED */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_SHUTDOWN_PENDING */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_SHUTDOWN_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_SHUTDOWN_RECEIVED */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_SHUTDOWN_ACK_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
}

#define TYPE_SCTP_EVENT_TIMEOUT_T1_COOKIE { \
	/* SCTP_STATE_EMPTY */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_CLOSED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_COOKIE_WAIT */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_COOKIE_ECHOED */ \
	TYPE_SCTP_FUNC(sctp_sf_t1_cookie_timer_expire), \
	/* SCTP_STATE_ESTABLISHED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_PENDING */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_RECEIVED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_ACK_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
}

#define TYPE_SCTP_EVENT_TIMEOUT_T1_INIT { \
	/* SCTP_STATE_EMPTY */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_CLOSED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_COOKIE_WAIT */ \
	TYPE_SCTP_FUNC(sctp_sf_t1_init_timer_expire), \
	/* SCTP_STATE_COOKIE_ECHOED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_ESTABLISHED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_PENDING */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_RECEIVED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_ACK_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
}

#define TYPE_SCTP_EVENT_TIMEOUT_T2_SHUTDOWN { \
	/* SCTP_STATE_EMPTY */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_CLOSED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_COOKIE_WAIT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_COOKIE_ECHOED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_ESTABLISHED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_PENDING */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_t2_timer_expire), \
	/* SCTP_STATE_SHUTDOWN_RECEIVED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_ACK_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_t2_timer_expire), \
}

#define TYPE_SCTP_EVENT_TIMEOUT_T3_RTX { \
	/* SCTP_STATE_EMPTY */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_CLOSED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_COOKIE_WAIT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_COOKIE_ECHOED */ \
	TYPE_SCTP_FUNC(sctp_sf_do_6_3_3_rtx), \
	/* SCTP_STATE_ESTABLISHED */ \
	TYPE_SCTP_FUNC(sctp_sf_do_6_3_3_rtx), \
	/* SCTP_STATE_SHUTDOWN_PENDING */ \
	TYPE_SCTP_FUNC(sctp_sf_do_6_3_3_rtx), \
	/* SCTP_STATE_SHUTDOWN_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_RECEIVED */ \
	TYPE_SCTP_FUNC(sctp_sf_do_6_3_3_rtx), \
	/* SCTP_STATE_SHUTDOWN_ACK_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
}

#define TYPE_SCTP_EVENT_TIMEOUT_T4_RTO { \
	/* SCTP_STATE_EMPTY */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_CLOSED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_COOKIE_WAIT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_COOKIE_ECHOED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_ESTABLISHED */ \
	TYPE_SCTP_FUNC(sctp_sf_t4_timer_expire), \
	/* SCTP_STATE_SHUTDOWN_PENDING */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_RECEIVED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_ACK_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
}

#define TYPE_SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD { \
	/* SCTP_STATE_EMPTY */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_CLOSED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_COOKIE_WAIT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_COOKIE_ECHOED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_ESTABLISHED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_PENDING */ \
	TYPE_SCTP_FUNC(sctp_sf_t5_timer_expire), \
	/* SCTP_STATE_SHUTDOWN_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_t5_timer_expire), \
	/* SCTP_STATE_SHUTDOWN_RECEIVED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_ACK_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
}

#define TYPE_SCTP_EVENT_TIMEOUT_HEARTBEAT { \
	/* SCTP_STATE_EMPTY */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_CLOSED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_COOKIE_WAIT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_COOKIE_ECHOED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_ESTABLISHED */ \
	TYPE_SCTP_FUNC(sctp_sf_sendbeat_8_3), \
	/* SCTP_STATE_SHUTDOWN_PENDING */ \
	TYPE_SCTP_FUNC(sctp_sf_sendbeat_8_3), \
	/* SCTP_STATE_SHUTDOWN_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_RECEIVED */ \
	TYPE_SCTP_FUNC(sctp_sf_sendbeat_8_3), \
	/* SCTP_STATE_SHUTDOWN_ACK_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
}

#define TYPE_SCTP_EVENT_TIMEOUT_SACK { \
	/* SCTP_STATE_EMPTY */ \
	TYPE_SCTP_FUNC(sctp_sf_bug), \
	/* SCTP_STATE_CLOSED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_COOKIE_WAIT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_COOKIE_ECHOED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_ESTABLISHED */ \
	TYPE_SCTP_FUNC(sctp_sf_do_6_2_sack), \
	/* SCTP_STATE_SHUTDOWN_PENDING */ \
	TYPE_SCTP_FUNC(sctp_sf_do_6_2_sack), \
	/* SCTP_STATE_SHUTDOWN_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_do_6_2_sack), \
	/* SCTP_STATE_SHUTDOWN_RECEIVED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_ACK_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
}

#define TYPE_SCTP_EVENT_TIMEOUT_AUTOCLOSE { \
	/* SCTP_STATE_EMPTY */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_CLOSED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_COOKIE_WAIT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_COOKIE_ECHOED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_ESTABLISHED */ \
	TYPE_SCTP_FUNC(sctp_sf_autoclose_timer_expire), \
	/* SCTP_STATE_SHUTDOWN_PENDING */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_RECEIVED */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
	/* SCTP_STATE_SHUTDOWN_ACK_SENT */ \
	TYPE_SCTP_FUNC(sctp_sf_timer_ignore), \
}

static const sctp_sm_table_entry_t timeout_event_table[SCTP_NUM_TIMEOUT_TYPES][SCTP_STATE_NUM_STATES] = {
	TYPE_SCTP_EVENT_TIMEOUT_NONE,
	TYPE_SCTP_EVENT_TIMEOUT_T1_COOKIE,
	TYPE_SCTP_EVENT_TIMEOUT_T1_INIT,
	TYPE_SCTP_EVENT_TIMEOUT_T2_SHUTDOWN,
	TYPE_SCTP_EVENT_TIMEOUT_T3_RTX,
	TYPE_SCTP_EVENT_TIMEOUT_T4_RTO,
	TYPE_SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD,
	TYPE_SCTP_EVENT_TIMEOUT_HEARTBEAT,
	TYPE_SCTP_EVENT_TIMEOUT_SACK,
	TYPE_SCTP_EVENT_TIMEOUT_AUTOCLOSE,
};

static const sctp_sm_table_entry_t *sctp_chunk_event_lookup(sctp_cid_t cid,
							    sctp_state_t state)
{
	if (state > SCTP_STATE_MAX)
		return &bug;

	if (cid <= SCTP_CID_BASE_MAX)
		return &chunk_event_table[cid][state];

	if (sctp_prsctp_enable) {
		if (cid == SCTP_CID_FWD_TSN)
			return &prsctp_chunk_event_table[0][state];
	}

	if (sctp_addip_enable) {
		if (cid == SCTP_CID_ASCONF)
			return &addip_chunk_event_table[0][state];

		if (cid == SCTP_CID_ASCONF_ACK)
			return &addip_chunk_event_table[1][state];
	}

	if (sctp_auth_enable) {
		if (cid == SCTP_CID_AUTH)
			return &auth_chunk_event_table[0][state];
	}

	return &chunk_event_table_unknown[state];
}