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/*********************************************************************
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
********************************************************************/
#include <linux/sched.h>
#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);
char *ircomm_state[] = {
"IRCOMM_IDLE",
"IRCOMM_WAITI",
"IRCOMM_WAITR",
"IRCOMM_CONN",
};
char *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",
};
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, __FUNCTION__"(), unknown event: %s\n",
ircomm_event[event]);
if (skb)
dev_kfree_skb(skb);
return -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, __FUNCTION__"(), unknown event: %s\n",
ircomm_event[event]);
if (skb)
dev_kfree_skb(skb);
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, __FUNCTION__ "(), unknown event = %s\n",
ircomm_event[event]);
if (skb)
dev_kfree_skb(skb);
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, __FUNCTION__ "(), unknown event = %s\n",
ircomm_event[event]);
if (skb)
dev_kfree_skb(skb);
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, __FUNCTION__": state=%s, event=%s\n",
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, __FUNCTION__": next state=%s, service type=%d\n",
ircomm_state[self->state], self->service_type);
}
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