[mirror_ubuntu-artful-kernel.git] / net / irda / ircomm / ircomm_event.c

/*********************************************************************
 *
 * Filename:      ircomm_event.c
 * Version:       1.0
 * Description:   IrCOMM layer state machine
 * Status:        Stable
 * Author:        Dag Brattli <dagb@cs.uit.no>
 * Created at:    Sun Jun  6 20:33:11 1999
 * Modified at:   Sun Dec 12 13:44:32 1999
 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 *
 *     Copyright (c) 1999 Dag Brattli, All Rights Reserved.
 *
 *     This program is free software; you can redistribute it and/or
 *     modify it under the terms of the GNU General Public License as
 *     published by the Free Software Foundation; either version 2 of
 *     the License, or (at your option) any later version.
 *
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 ********************************************************************/

#include <linux/proc_fs.h>
#include <linux/init.h>

#include <net/irda/irda.h>
#include <net/irda/irlmp.h>
#include <net/irda/iriap.h>
#include <net/irda/irttp.h>
#include <net/irda/irias_object.h>

#include <net/irda/ircomm_core.h>
#include <net/irda/ircomm_event.h>

static int ircomm_state_idle(struct ircomm_cb *self, IRCOMM_EVENT event,
			     struct sk_buff *skb, struct ircomm_info *info);
static int ircomm_state_waiti(struct ircomm_cb *self, IRCOMM_EVENT event,
			      struct sk_buff *skb, struct ircomm_info *info);
static int ircomm_state_waitr(struct ircomm_cb *self, IRCOMM_EVENT event,
			      struct sk_buff *skb, struct ircomm_info *info);
static int ircomm_state_conn(struct ircomm_cb *self, IRCOMM_EVENT event,
			     struct sk_buff *skb, struct ircomm_info *info);

const char *const ircomm_state[] = {
	"IRCOMM_IDLE",
	"IRCOMM_WAITI",
	"IRCOMM_WAITR",
	"IRCOMM_CONN",
};

#ifdef CONFIG_IRDA_DEBUG
static const char *const ircomm_event[] = {
	"IRCOMM_CONNECT_REQUEST",
	"IRCOMM_CONNECT_RESPONSE",
	"IRCOMM_TTP_CONNECT_INDICATION",
	"IRCOMM_LMP_CONNECT_INDICATION",
	"IRCOMM_TTP_CONNECT_CONFIRM",
	"IRCOMM_LMP_CONNECT_CONFIRM",

	"IRCOMM_LMP_DISCONNECT_INDICATION",
	"IRCOMM_TTP_DISCONNECT_INDICATION",
	"IRCOMM_DISCONNECT_REQUEST",

	"IRCOMM_TTP_DATA_INDICATION",
	"IRCOMM_LMP_DATA_INDICATION",
	"IRCOMM_DATA_REQUEST",
	"IRCOMM_CONTROL_REQUEST",
	"IRCOMM_CONTROL_INDICATION",
};
#endif /* CONFIG_IRDA_DEBUG */

static int (*state[])(struct ircomm_cb *self, IRCOMM_EVENT event,
		      struct sk_buff *skb, struct ircomm_info *info) =
{
	ircomm_state_idle,
	ircomm_state_waiti,
	ircomm_state_waitr,
	ircomm_state_conn,
};

/*
 * Function ircomm_state_idle (self, event, skb)
 *
 *    IrCOMM is currently idle
 *
 */
static int ircomm_state_idle(struct ircomm_cb *self, IRCOMM_EVENT event,
			     struct sk_buff *skb, struct ircomm_info *info)
{
	int ret = 0;

	switch (event) {
	case IRCOMM_CONNECT_REQUEST:
		ircomm_next_state(self, IRCOMM_WAITI);
		ret = self->issue.connect_request(self, skb, info);
		break;
	case IRCOMM_TTP_CONNECT_INDICATION:
	case IRCOMM_LMP_CONNECT_INDICATION:
		ircomm_next_state(self, IRCOMM_WAITR);
		ircomm_connect_indication(self, skb, info);
		break;
	default:
		IRDA_DEBUG(4, "%s(), unknown event: %s\n", __func__ ,
			   ircomm_event[event]);
		ret = -EINVAL;
	}
	return ret;
}

/*
 * Function ircomm_state_waiti (self, event, skb)
 *
 *    The IrCOMM user has requested an IrCOMM connection to the remote
 *    device and is awaiting confirmation
 */
static int ircomm_state_waiti(struct ircomm_cb *self, IRCOMM_EVENT event,
			      struct sk_buff *skb, struct ircomm_info *info)
{
	int ret = 0;

	switch (event) {
	case IRCOMM_TTP_CONNECT_CONFIRM:
	case IRCOMM_LMP_CONNECT_CONFIRM:
		ircomm_next_state(self, IRCOMM_CONN);
		ircomm_connect_confirm(self, skb, info);
		break;
	case IRCOMM_TTP_DISCONNECT_INDICATION:
	case IRCOMM_LMP_DISCONNECT_INDICATION:
		ircomm_next_state(self, IRCOMM_IDLE);
		ircomm_disconnect_indication(self, skb, info);
		break;
	default:
		IRDA_DEBUG(0, "%s(), unknown event: %s\n", __func__ ,
			   ircomm_event[event]);
		ret = -EINVAL;
	}
	return ret;
}

/*
 * Function ircomm_state_waitr (self, event, skb)
 *
 *    IrCOMM has received an incoming connection request and is awaiting
 *    response from the user
 */
static int ircomm_state_waitr(struct ircomm_cb *self, IRCOMM_EVENT event,
			      struct sk_buff *skb, struct ircomm_info *info)
{
	int ret = 0;

	switch (event) {
	case IRCOMM_CONNECT_RESPONSE:
		ircomm_next_state(self, IRCOMM_CONN);
		ret = self->issue.connect_response(self, skb);
		break;
	case IRCOMM_DISCONNECT_REQUEST:
		ircomm_next_state(self, IRCOMM_IDLE);
		ret = self->issue.disconnect_request(self, skb, info);
		break;
	case IRCOMM_TTP_DISCONNECT_INDICATION:
	case IRCOMM_LMP_DISCONNECT_INDICATION:
		ircomm_next_state(self, IRCOMM_IDLE);
		ircomm_disconnect_indication(self, skb, info);
		break;
	default:
		IRDA_DEBUG(0, "%s(), unknown event = %s\n", __func__ ,
			   ircomm_event[event]);
		ret = -EINVAL;
	}
	return ret;
}

/*
 * Function ircomm_state_conn (self, event, skb)
 *
 *    IrCOMM is connected to the peer IrCOMM device
 *
 */
static int ircomm_state_conn(struct ircomm_cb *self, IRCOMM_EVENT event,
			     struct sk_buff *skb, struct ircomm_info *info)
{
	int ret = 0;

	switch (event) {
	case IRCOMM_DATA_REQUEST:
		ret = self->issue.data_request(self, skb, 0);
		break;
	case IRCOMM_TTP_DATA_INDICATION:
		ircomm_process_data(self, skb);
		break;
	case IRCOMM_LMP_DATA_INDICATION:
		ircomm_data_indication(self, skb);
		break;
	case IRCOMM_CONTROL_REQUEST:
		/* Just send a separate frame for now */
		ret = self->issue.data_request(self, skb, skb->len);
		break;
	case IRCOMM_TTP_DISCONNECT_INDICATION:
	case IRCOMM_LMP_DISCONNECT_INDICATION:
		ircomm_next_state(self, IRCOMM_IDLE);
		ircomm_disconnect_indication(self, skb, info);
		break;
	case IRCOMM_DISCONNECT_REQUEST:
		ircomm_next_state(self, IRCOMM_IDLE);
		ret = self->issue.disconnect_request(self, skb, info);
		break;
	default:
		IRDA_DEBUG(0, "%s(), unknown event = %s\n", __func__ ,
			   ircomm_event[event]);
		ret = -EINVAL;
	}
	return ret;
}

/*
 * Function ircomm_do_event (self, event, skb)
 *
 *    Process event
 *
 */
int ircomm_do_event(struct ircomm_cb *self, IRCOMM_EVENT event,
		    struct sk_buff *skb, struct ircomm_info *info)
{
	IRDA_DEBUG(4, "%s: state=%s, event=%s\n", __func__ ,
		   ircomm_state[self->state], ircomm_event[event]);

	return (*state[self->state])(self, event, skb, info);
}

/*
 * Function ircomm_next_state (self, state)
 *
 *    Switch state
 *
 */
void ircomm_next_state(struct ircomm_cb *self, IRCOMM_STATE state)
{
	self->state = state;

	IRDA_DEBUG(4, "%s: next state=%s, service type=%d\n", __func__ ,
		   ircomm_state[self->state], self->service_type);
}
Commit	Line	Data
1da177e4	1	/*********************************************************************
6819bc2e	2	*
1da177e4 LT	3	* Filename: ircomm_event.c
	4	* Version: 1.0
	5	* Description: IrCOMM layer state machine
	6	* Status: Stable
	7	* Author: Dag Brattli <dagb@cs.uit.no>
	8	* Created at: Sun Jun 6 20:33:11 1999
	9	* Modified at: Sun Dec 12 13:44:32 1999
	10	* Modified by: Dag Brattli <dagb@cs.uit.no>
6819bc2e	11	*
1da177e4	12	* Copyright (c) 1999 Dag Brattli, All Rights Reserved.
6819bc2e YH	13	*
	14	* This program is free software; you can redistribute it and/or
	15	* modify it under the terms of the GNU General Public License as
	16	* published by the Free Software Foundation; either version 2 of
1da177e4	17	* the License, or (at your option) any later version.
6819bc2e	18	*
1da177e4 LT	19	* This program is distributed in the hope that it will be useful,
	20	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	22	* GNU General Public License for more details.
6819bc2e YH	23	*
6819bc2e YH	24	* You should have received a copy of the GNU General Public License
d3770509	25	* along with this program; if not, see <http://www.gnu.org/licenses/>.
6819bc2e	26	*
1da177e4 LT	27	********************************************************************/
1da177e4 LT	28
1da177e4 LT	29	#include <linux/proc_fs.h>
	30	#include <linux/init.h>
	31
	32	#include <net/irda/irda.h>
	33	#include <net/irda/irlmp.h>
	34	#include <net/irda/iriap.h>
	35	#include <net/irda/irttp.h>
	36	#include <net/irda/irias_object.h>
	37
	38	#include <net/irda/ircomm_core.h>
	39	#include <net/irda/ircomm_event.h>
	40
6819bc2e	41	static int ircomm_state_idle(struct ircomm_cb *self, IRCOMM_EVENT event,
1da177e4	42	struct sk_buff skb, struct ircomm_info info);
6819bc2e	43	static int ircomm_state_waiti(struct ircomm_cb *self, IRCOMM_EVENT event,
1da177e4	44	struct sk_buff skb, struct ircomm_info info);
6819bc2e	45	static int ircomm_state_waitr(struct ircomm_cb *self, IRCOMM_EVENT event,
1da177e4	46	struct sk_buff skb, struct ircomm_info info);
6819bc2e	47	static int ircomm_state_conn(struct ircomm_cb *self, IRCOMM_EVENT event,
1da177e4 LT	48	struct sk_buff skb, struct ircomm_info info);
1da177e4 LT	49
36cbd3dc	50	const char *const ircomm_state[] = {
1da177e4 LT	51	"IRCOMM_IDLE",
	52	"IRCOMM_WAITI",
	53	"IRCOMM_WAITR",
	54	"IRCOMM_CONN",
	55	};
	56
	57	#ifdef CONFIG_IRDA_DEBUG
36cbd3dc	58	static const char *const ircomm_event[] = {
1da177e4	59	"IRCOMM_CONNECT_REQUEST",
6819bc2e YH	60	"IRCOMM_CONNECT_RESPONSE",
6819bc2e YH	61	"IRCOMM_TTP_CONNECT_INDICATION",
1da177e4	62	"IRCOMM_LMP_CONNECT_INDICATION",
6819bc2e	63	"IRCOMM_TTP_CONNECT_CONFIRM",
1da177e4 LT	64	"IRCOMM_LMP_CONNECT_CONFIRM",
1da177e4 LT	65
6819bc2e	66	"IRCOMM_LMP_DISCONNECT_INDICATION",
1da177e4	67	"IRCOMM_TTP_DISCONNECT_INDICATION",
6819bc2e	68	"IRCOMM_DISCONNECT_REQUEST",
1da177e4	69
6819bc2e	70	"IRCOMM_TTP_DATA_INDICATION",
1da177e4	71	"IRCOMM_LMP_DATA_INDICATION",
6819bc2e YH	72	"IRCOMM_DATA_REQUEST",
	73	"IRCOMM_CONTROL_REQUEST",
	74	"IRCOMM_CONTROL_INDICATION",
1da177e4 LT	75	};
	76	#endif /* CONFIG_IRDA_DEBUG */
	77
	78	static int (state[])(struct ircomm_cb self, IRCOMM_EVENT event,
6819bc2e	79	struct sk_buff skb, struct ircomm_info info) =
1da177e4 LT	80	{
	81	ircomm_state_idle,
	82	ircomm_state_waiti,
	83	ircomm_state_waitr,
	84	ircomm_state_conn,
	85	};
	86
	87	/*
	88	* Function ircomm_state_idle (self, event, skb)
	89	*
	90	* IrCOMM is currently idle
	91	*
	92	*/
6819bc2e	93	static int ircomm_state_idle(struct ircomm_cb *self, IRCOMM_EVENT event,
1da177e4 LT	94	struct sk_buff skb, struct ircomm_info info)
	95	{
	96	int ret = 0;
	97
	98	switch (event) {
	99	case IRCOMM_CONNECT_REQUEST:
6819bc2e	100	ircomm_next_state(self, IRCOMM_WAITI);
1da177e4 LT	101	ret = self->issue.connect_request(self, skb, info);
	102	break;
	103	case IRCOMM_TTP_CONNECT_INDICATION:
	104	case IRCOMM_LMP_CONNECT_INDICATION:
	105	ircomm_next_state(self, IRCOMM_WAITR);
	106	ircomm_connect_indication(self, skb, info);
	107	break;
	108	default:
0dc47877	109	IRDA_DEBUG(4, "%s(), unknown event: %s\n", __func__ ,
1da177e4 LT	110	ircomm_event[event]);
	111	ret = -EINVAL;
	112	}
	113	return ret;
	114	}
	115
	116	/*
	117	* Function ircomm_state_waiti (self, event, skb)
	118	*
6819bc2e	119	* The IrCOMM user has requested an IrCOMM connection to the remote
1da177e4 LT	120	* device and is awaiting confirmation
1da177e4 LT	121	*/
6819bc2e	122	static int ircomm_state_waiti(struct ircomm_cb *self, IRCOMM_EVENT event,
1da177e4 LT	123	struct sk_buff skb, struct ircomm_info info)
	124	{
	125	int ret = 0;
	126
	127	switch (event) {
	128	case IRCOMM_TTP_CONNECT_CONFIRM:
	129	case IRCOMM_LMP_CONNECT_CONFIRM:
	130	ircomm_next_state(self, IRCOMM_CONN);
	131	ircomm_connect_confirm(self, skb, info);
	132	break;
	133	case IRCOMM_TTP_DISCONNECT_INDICATION:
	134	case IRCOMM_LMP_DISCONNECT_INDICATION:
	135	ircomm_next_state(self, IRCOMM_IDLE);
	136	ircomm_disconnect_indication(self, skb, info);
	137	break;
	138	default:
0dc47877	139	IRDA_DEBUG(0, "%s(), unknown event: %s\n", __func__ ,
1da177e4 LT	140	ircomm_event[event]);
	141	ret = -EINVAL;
	142	}
	143	return ret;
	144	}
	145
	146	/*
	147	* Function ircomm_state_waitr (self, event, skb)
	148	*
	149	* IrCOMM has received an incoming connection request and is awaiting
	150	* response from the user
	151	*/
6819bc2e YH	152	static int ircomm_state_waitr(struct ircomm_cb *self, IRCOMM_EVENT event,
6819bc2e YH	153	struct sk_buff skb, struct ircomm_info info)
1da177e4 LT	154	{
	155	int ret = 0;
	156
	157	switch (event) {
	158	case IRCOMM_CONNECT_RESPONSE:
	159	ircomm_next_state(self, IRCOMM_CONN);
	160	ret = self->issue.connect_response(self, skb);
	161	break;
	162	case IRCOMM_DISCONNECT_REQUEST:
	163	ircomm_next_state(self, IRCOMM_IDLE);
	164	ret = self->issue.disconnect_request(self, skb, info);
	165	break;
	166	case IRCOMM_TTP_DISCONNECT_INDICATION:
	167	case IRCOMM_LMP_DISCONNECT_INDICATION:
	168	ircomm_next_state(self, IRCOMM_IDLE);
	169	ircomm_disconnect_indication(self, skb, info);
	170	break;
	171	default:
0dc47877	172	IRDA_DEBUG(0, "%s(), unknown event = %s\n", __func__ ,
1da177e4 LT	173	ircomm_event[event]);
	174	ret = -EINVAL;
	175	}
	176	return ret;
	177	}
	178
	179	/*
	180	* Function ircomm_state_conn (self, event, skb)
	181	*
	182	* IrCOMM is connected to the peer IrCOMM device
	183	*
	184	*/
6819bc2e	185	static int ircomm_state_conn(struct ircomm_cb *self, IRCOMM_EVENT event,
1da177e4 LT	186	struct sk_buff skb, struct ircomm_info info)
	187	{
	188	int ret = 0;
	189
	190	switch (event) {
	191	case IRCOMM_DATA_REQUEST:
	192	ret = self->issue.data_request(self, skb, 0);
	193	break;
	194	case IRCOMM_TTP_DATA_INDICATION:
	195	ircomm_process_data(self, skb);
	196	break;
	197	case IRCOMM_LMP_DATA_INDICATION:
	198	ircomm_data_indication(self, skb);
	199	break;
	200	case IRCOMM_CONTROL_REQUEST:
	201	/* Just send a separate frame for now */
	202	ret = self->issue.data_request(self, skb, skb->len);
	203	break;
	204	case IRCOMM_TTP_DISCONNECT_INDICATION:
	205	case IRCOMM_LMP_DISCONNECT_INDICATION:
	206	ircomm_next_state(self, IRCOMM_IDLE);
	207	ircomm_disconnect_indication(self, skb, info);
	208	break;
	209	case IRCOMM_DISCONNECT_REQUEST:
	210	ircomm_next_state(self, IRCOMM_IDLE);
	211	ret = self->issue.disconnect_request(self, skb, info);
	212	break;
	213	default:
0dc47877	214	IRDA_DEBUG(0, "%s(), unknown event = %s\n", __func__ ,
1da177e4 LT	215	ircomm_event[event]);
	216	ret = -EINVAL;
	217	}
	218	return ret;
	219	}
	220
	221	/*
	222	* Function ircomm_do_event (self, event, skb)
	223	*
	224	* Process event
	225	*
	226	*/
	227	int ircomm_do_event(struct ircomm_cb *self, IRCOMM_EVENT event,
6819bc2e	228	struct sk_buff skb, struct ircomm_info info)
1da177e4	229	{
0dc47877	230	IRDA_DEBUG(4, "%s: state=%s, event=%s\n", __func__ ,
1da177e4 LT	231	ircomm_state[self->state], ircomm_event[event]);
	232
	233	return (*state[self->state])(self, event, skb, info);
	234	}
	235
	236	/*
	237	* Function ircomm_next_state (self, state)
	238	*
	239	* Switch state
	240	*
	241	*/
	242	void ircomm_next_state(struct ircomm_cb *self, IRCOMM_STATE state)
	243	{
	244	self->state = state;
6819bc2e	245
0dc47877	246	IRDA_DEBUG(4, "%s: next state=%s, service type=%d\n", __func__ ,
1da177e4 LT	247	ircomm_state[self->state], self->service_type);
1da177e4 LT	248	}