llc_c_st.c

Linux Kernel 2.6.9 for OMAP1710

/*
 * llc_c_st.c - This module contains state transition of connection component.
 *
 * Description of event functions and actions there is in 802.2 LLC standard,
 * or in "llc_c_ac.c" and "llc_c_ev.c" modules.
 *
 * Copyright (c) 1997 by Procom Technology, Inc.
 * 		 2001-2003 by Arnaldo Carvalho de Melo <[e-mail]>
 *
 * This program can be redistributed or modified under the terms of the
 * GNU General Public License as published by the Free Software Foundation.
 * This program is distributed without any warranty or implied warranty
 * of merchantability or fitness for a particular purpose.
 *
 * See the GNU General Public License for more details.
 */
#include <linux/types.h>
#include <net/llc_if.h>
#include <net/llc_sap.h>
#include <net/llc_c_ev.h>
#include <net/llc_c_ac.h>
#include <net/llc_c_st.h>

#define NONE NULL

/* COMMON CONNECTION STATE transitions
 * Common transitions for
 * LLC_CONN_STATE_NORMAL,
 * LLC_CONN_STATE_BUSY,
 * LLC_CONN_STATE_REJ,
 * LLC_CONN_STATE_AWAIT,
 * LLC_CONN_STATE_AWAIT_BUSY and
 * LLC_CONN_STATE_AWAIT_REJ states
 */
/* State transitions for LLC_CONN_EV_DISC_REQ event */
static llc_conn_action_t llc_common_actions_1[] = {
	[0] = llc_conn_ac_send_disc_cmd_p_set_x,
	[1] = llc_conn_ac_start_ack_timer,
	[2] = llc_conn_ac_stop_other_timers,
	[3] = llc_conn_ac_set_retry_cnt_0,
	[4] = llc_conn_ac_set_cause_flag_1,
	[5] = NULL,
};

static struct llc_conn_state_trans llc_common_state_trans_1 = {
	.ev	       = llc_conn_ev_disc_req,
	.next_state    = LLC_CONN_STATE_D_CONN,
	.ev_qualifiers = NONE,
	.ev_actions    = llc_common_actions_1,
};

/* State transitions for LLC_CONN_EV_RESET_REQ event */
static llc_conn_action_t llc_common_actions_2[] = {
	[0] = llc_conn_ac_send_sabme_cmd_p_set_x,
	[1] = llc_conn_ac_start_ack_timer,
	[2] = llc_conn_ac_stop_other_timers,
	[3] = llc_conn_ac_set_retry_cnt_0,
	[4] = llc_conn_ac_set_cause_flag_1,
	[5] = NULL,
};

static struct llc_conn_state_trans llc_common_state_trans_2 = {
	.ev	       = llc_conn_ev_rst_req,
	.next_state    = LLC_CONN_STATE_RESET,
	.ev_qualifiers = NONE,
	.ev_actions    = llc_common_actions_2,
};

/* State transitions for LLC_CONN_EV_RX_SABME_CMD_Pbit_SET_X event */
static llc_conn_action_t llc_common_actions_3[] = {
	[0] = llc_conn_ac_stop_all_timers,
	[1] = llc_conn_ac_set_vs_0,
	[2] = llc_conn_ac_set_vr_0,
	[3] = llc_conn_ac_send_ua_rsp_f_set_p,
	[4] = llc_conn_ac_rst_ind,
	[5] = llc_conn_ac_set_p_flag_0,
	[6] = llc_conn_ac_set_remote_busy_0,
	[7] = llc_conn_reset,
	[8] = NULL,
};

static struct llc_conn_state_trans llc_common_state_trans_3 = {
	.ev	       = llc_conn_ev_rx_sabme_cmd_pbit_set_x,
	.next_state    = LLC_CONN_STATE_NORMAL,
	.ev_qualifiers = NONE,
	.ev_actions    = llc_common_actions_3,
};

/* State transitions for LLC_CONN_EV_RX_DISC_CMD_Pbit_SET_X event */
static llc_conn_action_t llc_common_actions_4[] = {
	[0] = llc_conn_ac_stop_all_timers,
	[1] = llc_conn_ac_send_ua_rsp_f_set_p,
	[2] = llc_conn_ac_disc_ind,
	[3] = llc_conn_disc,
	[4] = NULL,
};

static struct llc_conn_state_trans llc_common_state_trans_4 = {
	.ev	       = llc_conn_ev_rx_disc_cmd_pbit_set_x,
	.next_state    = LLC_CONN_STATE_ADM,
	.ev_qualifiers = NONE,
	.ev_actions    = llc_common_actions_4,
};

/* State transitions for LLC_CONN_EV_RX_FRMR_RSP_Fbit_SET_X event */
static llc_conn_action_t llc_common_actions_5[] = {
	[0] = llc_conn_ac_send_sabme_cmd_p_set_x,
	[1] = llc_conn_ac_start_ack_timer,
	[2] = llc_conn_ac_stop_other_timers,
	[3] = llc_conn_ac_set_retry_cnt_0,
	[4] = llc_conn_ac_rst_ind,
	[5] = llc_conn_ac_set_cause_flag_0,
	[6] = llc_conn_reset,
	[7] = NULL,
};

static struct llc_conn_state_trans llc_common_state_trans_5 = {
	.ev	       = llc_conn_ev_rx_frmr_rsp_fbit_set_x,
	.next_state    = LLC_CONN_STATE_RESET,
	.ev_qualifiers = NONE,
	.ev_actions    = llc_common_actions_5,
};

/* State transitions for LLC_CONN_EV_RX_DM_RSP_Fbit_SET_X event */
static llc_conn_action_t llc_common_actions_6[] = {
	[0] = llc_conn_ac_disc_ind,
	[1] = llc_conn_ac_stop_all_timers,
	[2] = llc_conn_disc,
	[3] = NULL,
};

static struct llc_conn_state_trans llc_common_state_trans_6 = {
	.ev	       = llc_conn_ev_rx_dm_rsp_fbit_set_x,
	.next_state    = LLC_CONN_STATE_ADM,
	.ev_qualifiers = NONE,
	.ev_actions    = llc_common_actions_6,
};

/* State transitions for LLC_CONN_EV_RX_ZZZ_CMD_Pbit_SET_X_INVAL_Nr event */
static llc_conn_action_t llc_common_actions_7a[] = {
	[0] = llc_conn_ac_send_frmr_rsp_f_set_x,
	[1] = llc_conn_ac_start_ack_timer,
	[2] = llc_conn_ac_stop_other_timers,
	[3] = llc_conn_ac_set_retry_cnt_0,
	[4] = NULL,
};

static struct llc_conn_state_trans llc_common_state_trans_7a = {
	.ev	       = llc_conn_ev_rx_zzz_cmd_pbit_set_x_inval_nr,
	.next_state    = LLC_CONN_STATE_ERROR,
	.ev_qualifiers = NONE,
	.ev_actions    = llc_common_actions_7a,
};

/* State transitions for LLC_CONN_EV_RX_I_CMD_Pbit_SET_X_INVAL_Ns event */
static llc_conn_action_t llc_common_actions_7b[] = {
	[0] = llc_conn_ac_send_frmr_rsp_f_set_x,
	[1] = llc_conn_ac_start_ack_timer,
	[2] = llc_conn_ac_stop_other_timers,
	[3] = llc_conn_ac_set_retry_cnt_0,
	[4] = NULL,
};

static struct llc_conn_state_trans llc_common_state_trans_7b = {
	.ev	       = llc_conn_ev_rx_i_cmd_pbit_set_x_inval_ns,
	.next_state    = LLC_CONN_STATE_ERROR,
	.ev_qualifiers = NONE,
	.ev_actions    = llc_common_actions_7b,
};

/* State transitions for LLC_CONN_EV_RX_ZZZ_RSP_Fbit_SET_X_INVAL_Nr event */
static llc_conn_action_t llc_common_actions_8a[] = {
	[0] = llc_conn_ac_send_frmr_rsp_f_set_x,
	[1] = llc_conn_ac_start_ack_timer,
	[2] = llc_conn_ac_stop_other_timers,
	[3] = llc_conn_ac_set_retry_cnt_0,
	[4] = NULL,
};

static struct llc_conn_state_trans llc_common_state_trans_8a = {
	.ev	       = llc_conn_ev_rx_zzz_rsp_fbit_set_x_inval_nr,
	.next_state    = LLC_CONN_STATE_ERROR,
	.ev_qualifiers = NONE,
	.ev_actions    = llc_common_actions_8a,
};

/* State transitions for LLC_CONN_EV_RX_I_RSP_Fbit_SET_X_INVAL_Ns event */
static llc_conn_action_t llc_common_actions_8b[] = {
	[0] = llc_conn_ac_send_frmr_rsp_f_set_x,
	[1] = llc_conn_ac_start_ack_timer,
	[2] = llc_conn_ac_stop_other_timers,
	[3] = llc_conn_ac_set_retry_cnt_0,
	[4] = NULL,
};

static struct llc_conn_state_trans llc_common_state_trans_8b = {
	.ev	       = llc_conn_ev_rx_i_rsp_fbit_set_x_inval_ns,
	.next_state    = LLC_CONN_STATE_ERROR,
	.ev_qualifiers = NONE,
	.ev_actions    = llc_common_actions_8b,
};

/* State transitions for LLC_CONN_EV_RX_BAD_PDU event */
static llc_conn_action_t llc_common_actions_8c[] = {
	[0] = llc_conn_ac_send_frmr_rsp_f_set_x,
	[1] = llc_conn_ac_start_ack_timer,
	[2] = llc_conn_ac_stop_other_timers,
	[3] = llc_conn_ac_set_retry_cnt_0,
	[4] = NULL,
};

static struct llc_conn_state_trans llc_common_state_trans_8c = {
	.ev	       = llc_conn_ev_rx_bad_pdu,
	.next_state    = LLC_CONN_STATE_ERROR,
	.ev_qualifiers = NONE,
	.ev_actions    = llc_common_actions_8c,
};

/* State transitions for LLC_CONN_EV_RX_UA_RSP_Fbit_SET_X event */
static llc_conn_action_t llc_common_actions_9[] = {
	[0] = llc_conn_ac_send_frmr_rsp_f_set_x,
	[1] = llc_conn_ac_start_ack_timer,
	[2] = llc_conn_ac_stop_other_timers,
	[3] = llc_conn_ac_set_retry_cnt_0,
	[4] = NULL,
};

static struct llc_conn_state_trans llc_common_state_trans_9 = {
	.ev	       = llc_conn_ev_rx_ua_rsp_fbit_set_x,
	.next_state    = LLC_CONN_STATE_ERROR,
	.ev_qualifiers = NONE,
	.ev_actions    = llc_common_actions_9,
};

/* State transitions for LLC_CONN_EV_RX_XXX_RSP_Fbit_SET_1 event */
#if 0
static llc_conn_ev_qfyr_t llc_common_ev_qfyrs_10[] = {
	[0] = llc_conn_ev_qlfy_p_flag_eq_0,
	[1] = NULL,
};

static llc_conn_action_t llc_common_actions_10[] = {
	[0] = llc_conn_ac_send_frmr_rsp_f_set_x,
	[1] = llc_conn_ac_start_ack_timer,
	[2] = llc_conn_ac_stop_other_timers,
	[3] = llc_conn_ac_set_retry_cnt_0,
	[4] = NULL,
};

static struct llc_conn_state_trans llc_common_state_trans_10 = {
	.ev	       = llc_conn_ev_rx_xxx_rsp_fbit_set_1,
	.next_state    = LLC_CONN_STATE_ERROR,
	.ev_qualifiers = llc_common_ev_qfyrs_10,
	.ev_actions    = llc_common_actions_10,
};
#endif

/* State transitions for LLC_CONN_EV_P_TMR_EXP event */
static llc_conn_ev_qfyr_t llc_common_ev_qfyrs_11a[] = {
	[0] = llc_conn_ev_qlfy_retry_cnt_gte_n2,
	[1] = NULL,
};

static llc_conn_action_t llc_common_actions_11a[] = {
	[0] = llc_conn_ac_send_sabme_cmd_p_set_x,
	[1] = llc_conn_ac_start_ack_timer,
	[2] = llc_conn_ac_stop_other_timers,
	[3] = llc_conn_ac_set_retry_cnt_0,
	[4] = llc_conn_ac_set_cause_flag_0,
	[5] = NULL,
};

static struct llc_conn_state_trans llc_common_state_trans_11a = {
	.ev	       = llc_conn_ev_p_tmr_exp,
	.next_state    = LLC_CONN_STATE_RESET,
	.ev_qualifiers = llc_common_ev_qfyrs_11a,
	.ev_actions    = llc_common_actions_11a,
};

/* State transitions for LLC_CONN_EV_ACK_TMR_EXP event */
static llc_conn_ev_qfyr_t llc_common_ev_qfyrs_11b[] = {
	[0] = llc_conn_ev_qlfy_retry_cnt_gte_n2,
	[1] = NULL,
};

static llc_conn_action_t llc_common_actions_11b[] = {
	[0] = llc_conn_ac_send_sabme_cmd_p_set_x,
	[1] = llc_conn_ac_start_ack_timer,
	[2] = llc_conn_ac_stop_other_timers,
	[3] = llc_conn_ac_set_retry_cnt_0,
	[4] = llc_conn_ac_set_cause_flag_0,
	[5] = NULL,
};

static struct llc_conn_state_trans llc_common_state_trans_11b = {
	.ev	       = llc_conn_ev_ack_tmr_exp,
	.next_state    = LLC_CONN_STATE_RESET,
	.ev_qualifiers = llc_common_ev_qfyrs_11b,
	.ev_actions    = llc_common_actions_11b,
};

/* State transitions for LLC_CONN_EV_REJ_TMR_EXP event */
static llc_conn_ev_qfyr_t llc_common_ev_qfyrs_11c[] = {
	[0] = llc_conn_ev_qlfy_retry_cnt_gte_n2,
	[1] = NULL,
};

static llc_conn_action_t llc_common_actions_11c[] = {
	[0] = llc_conn_ac_send_sabme_cmd_p_set_x,
	[1] = llc_conn_ac_start_ack_timer,
	[2] = llc_conn_ac_stop_other_timers,
	[3] = llc_conn_ac_set_retry_cnt_0,
	[4] = llc_conn_ac_set_cause_flag_0,
	[5] = NULL,
};

static struct llc_conn_state_trans llc_common_state_trans_11c = {
	.ev	       = llc_conn_ev_rej_tmr_exp,
	.next_state    = LLC_CONN_STATE_RESET,
	.ev_qualifiers = llc_common_ev_qfyrs_11c,
	.ev_actions    = llc_common_actions_11c,
};

/* State transitions for LLC_CONN_EV_BUSY_TMR_EXP event */
static llc_conn_ev_qfyr_t llc_common_ev_qfyrs_11d[] = {
	[0] = llc_conn_ev_qlfy_retry_cnt_gte_n2,
	[1] = NULL,
};

static llc_conn_action_t llc_common_actions_11d[] = {
	[0] = llc_conn_ac_send_sabme_cmd_p_set_x,
	[1] = llc_conn_ac_start_ack_timer,
	[2] = llc_conn_ac_stop_other_timers,
	[3] = llc_conn_ac_set_retry_cnt_0,
	[4] = llc_conn_ac_set_cause_flag_0,
	[5] = NULL,
};

static struct llc_conn_state_trans llc_common_state_trans_11d = {
	.ev	       = llc_conn_ev_busy_tmr_exp,
	.next_state    = LLC_CONN_STATE_RESET,
	.ev_qualifiers = llc_common_ev_qfyrs_11d,
	.ev_actions    = llc_common_actions_11d,
};

/*
 * Common dummy state transition; must be last entry for all state
 * transition groups - it'll be on .bss, so will be zeroed.
 */
static struct llc_conn_state_trans llc_common_state_trans_end;

/* LLC_CONN_STATE_ADM transitions */
/* State transitions for LLC_CONN_EV_CONN_REQ event */
static llc_conn_action_t llc_adm_actions_1[] = {
	[0] = llc_conn_ac_send_sabme_cmd_p_set_x,
	[1] = llc_conn_ac_start_ack_timer,
	[2] = llc_conn_ac_set_retry_cnt_0,
	[3] = llc_conn_ac_set_s_flag_0,
	[4] = NULL,
};

static struct llc_conn_state_trans llc_adm_state_trans_1 = {
	.ev	       = llc_conn_ev_conn_req,
	.next_state    = LLC_CONN_STATE_SETUP,
	.ev_qualifiers = NONE,
	.ev_actions    = llc_adm_actions_1,
};

/* State transitions for LLC_CONN_EV_RX_SABME_CMD_Pbit_SET_X event */
static llc_conn_action_t llc_adm_actions_2[] = {
	[0] = llc_conn_ac_send_ua_rsp_f_set_p,
	[1] = llc_conn_ac_set_vs_0,
	[2] = llc_conn_ac_set_vr_0,
	[3] = llc_conn_ac_set_retry_cnt_0,
	[4] = llc_conn_ac_set_p_flag_0,
	[5] = llc_conn_ac_set_remote_busy_0,
	[6] = llc_conn_ac_conn_ind,
	[7] = NULL,
};

static struct llc_conn_state_trans llc_adm_state_trans_2 = {
	.ev	       = llc_conn_ev_rx_sabme_cmd_pbit_set_x,
	.next_state    = LLC_CONN_STATE_NORMAL,
	.ev_qualifiers = NONE,
	.ev_actions    = llc_adm_actions_2,
};

/* State transitions for LLC_CONN_EV_RX_DISC_CMD_Pbit_SET_X event */
static llc_conn_action_t llc_adm_actions_3[] = {
	[0] = llc_conn_ac_send_dm_rsp_f_set_p,
	[1] = llc_conn_disc,
	[2] = NULL,
};

static struct llc_conn_state_trans llc_adm_state_trans_3 = {
	.ev	       = llc_conn_ev_rx_disc_cmd_pbit_set_x,
	.next_state    = LLC_CONN_STATE_ADM,
	.ev_qualifiers = NONE,
	.ev_actions    = llc_adm_actions_3,
};

/* State transitions for LLC_CONN_EV_RX_XXX_CMD_Pbit_SET_1 event */
static llc_conn_action_t llc_adm_actions_4[] = {
	[0] = llc_conn_ac_send_dm_rsp_f_set_1,
	[1] = llc_conn_disc,
	[2] = NULL,
};

static struct llc_conn_state_trans llc_adm_state_trans_4 = {
	.ev	       = llc_conn_ev_rx_xxx_cmd_pbit_set_1,
	.next_state    = LLC_CONN_STATE_ADM,
	.ev_qualifiers = NONE,
	.ev_actions    = llc_adm_actions_4,
};

/* State transitions for LLC_CONN_EV_RX_XXX_YYY event */
static llc_conn_action_t llc_adm_actions_5[] = {
	[0] = llc_conn_disc,
	[1] = NULL,
};

static struct llc_conn_state_trans llc_adm_state_trans_5 = {
	.ev	       = llc_conn_ev_rx_any_frame,
	.next_state    = LLC_CONN_OUT_OF_SVC,
	.ev_qualifiers = NONE,
	.ev_actions    = llc_adm_actions_5,
};