247 lines
6.8 KiB
C
247 lines
6.8 KiB
C
/*********************************************************************
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*
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* Filename: ircomm_event.c
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* Version: 1.0
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* Description: IrCOMM layer state machine
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* Status: Stable
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* Author: Dag Brattli <dagb@cs.uit.no>
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* Created at: Sun Jun 6 20:33:11 1999
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* Modified at: Sun Dec 12 13:44:32 1999
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* Modified by: Dag Brattli <dagb@cs.uit.no>
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*
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* Copyright (c) 1999 Dag Brattli, All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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********************************************************************/
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#include <linux/proc_fs.h>
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#include <linux/init.h>
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#include <net/irda/irda.h>
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#include <net/irda/irlmp.h>
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#include <net/irda/iriap.h>
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#include <net/irda/irttp.h>
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#include <net/irda/irias_object.h>
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#include <net/irda/ircomm_core.h>
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#include <net/irda/ircomm_event.h>
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static int ircomm_state_idle(struct ircomm_cb *self, IRCOMM_EVENT event,
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struct sk_buff *skb, struct ircomm_info *info);
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static int ircomm_state_waiti(struct ircomm_cb *self, IRCOMM_EVENT event,
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struct sk_buff *skb, struct ircomm_info *info);
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static int ircomm_state_waitr(struct ircomm_cb *self, IRCOMM_EVENT event,
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struct sk_buff *skb, struct ircomm_info *info);
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static int ircomm_state_conn(struct ircomm_cb *self, IRCOMM_EVENT event,
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struct sk_buff *skb, struct ircomm_info *info);
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const char *const ircomm_state[] = {
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"IRCOMM_IDLE",
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"IRCOMM_WAITI",
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"IRCOMM_WAITR",
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"IRCOMM_CONN",
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};
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static const char *const ircomm_event[] __maybe_unused = {
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"IRCOMM_CONNECT_REQUEST",
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"IRCOMM_CONNECT_RESPONSE",
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"IRCOMM_TTP_CONNECT_INDICATION",
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"IRCOMM_LMP_CONNECT_INDICATION",
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"IRCOMM_TTP_CONNECT_CONFIRM",
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"IRCOMM_LMP_CONNECT_CONFIRM",
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"IRCOMM_LMP_DISCONNECT_INDICATION",
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"IRCOMM_TTP_DISCONNECT_INDICATION",
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"IRCOMM_DISCONNECT_REQUEST",
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"IRCOMM_TTP_DATA_INDICATION",
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"IRCOMM_LMP_DATA_INDICATION",
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"IRCOMM_DATA_REQUEST",
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"IRCOMM_CONTROL_REQUEST",
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"IRCOMM_CONTROL_INDICATION",
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};
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static int (*state[])(struct ircomm_cb *self, IRCOMM_EVENT event,
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struct sk_buff *skb, struct ircomm_info *info) =
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{
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ircomm_state_idle,
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ircomm_state_waiti,
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ircomm_state_waitr,
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ircomm_state_conn,
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};
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/*
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* Function ircomm_state_idle (self, event, skb)
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*
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* IrCOMM is currently idle
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*
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*/
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static int ircomm_state_idle(struct ircomm_cb *self, IRCOMM_EVENT event,
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struct sk_buff *skb, struct ircomm_info *info)
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{
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int ret = 0;
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switch (event) {
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case IRCOMM_CONNECT_REQUEST:
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ircomm_next_state(self, IRCOMM_WAITI);
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ret = self->issue.connect_request(self, skb, info);
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break;
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case IRCOMM_TTP_CONNECT_INDICATION:
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case IRCOMM_LMP_CONNECT_INDICATION:
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ircomm_next_state(self, IRCOMM_WAITR);
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ircomm_connect_indication(self, skb, info);
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break;
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default:
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pr_debug("%s(), unknown event: %s\n", __func__ ,
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ircomm_event[event]);
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ret = -EINVAL;
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}
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return ret;
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}
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/*
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* Function ircomm_state_waiti (self, event, skb)
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*
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* The IrCOMM user has requested an IrCOMM connection to the remote
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* device and is awaiting confirmation
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*/
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static int ircomm_state_waiti(struct ircomm_cb *self, IRCOMM_EVENT event,
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struct sk_buff *skb, struct ircomm_info *info)
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{
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int ret = 0;
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switch (event) {
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case IRCOMM_TTP_CONNECT_CONFIRM:
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case IRCOMM_LMP_CONNECT_CONFIRM:
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ircomm_next_state(self, IRCOMM_CONN);
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ircomm_connect_confirm(self, skb, info);
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break;
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case IRCOMM_TTP_DISCONNECT_INDICATION:
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case IRCOMM_LMP_DISCONNECT_INDICATION:
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ircomm_next_state(self, IRCOMM_IDLE);
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ircomm_disconnect_indication(self, skb, info);
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break;
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default:
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pr_debug("%s(), unknown event: %s\n", __func__ ,
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ircomm_event[event]);
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ret = -EINVAL;
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}
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return ret;
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}
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/*
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* Function ircomm_state_waitr (self, event, skb)
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*
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* IrCOMM has received an incoming connection request and is awaiting
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* response from the user
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*/
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static int ircomm_state_waitr(struct ircomm_cb *self, IRCOMM_EVENT event,
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struct sk_buff *skb, struct ircomm_info *info)
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{
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int ret = 0;
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switch (event) {
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case IRCOMM_CONNECT_RESPONSE:
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ircomm_next_state(self, IRCOMM_CONN);
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ret = self->issue.connect_response(self, skb);
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break;
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case IRCOMM_DISCONNECT_REQUEST:
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ircomm_next_state(self, IRCOMM_IDLE);
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ret = self->issue.disconnect_request(self, skb, info);
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break;
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case IRCOMM_TTP_DISCONNECT_INDICATION:
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case IRCOMM_LMP_DISCONNECT_INDICATION:
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ircomm_next_state(self, IRCOMM_IDLE);
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ircomm_disconnect_indication(self, skb, info);
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break;
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default:
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pr_debug("%s(), unknown event = %s\n", __func__ ,
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ircomm_event[event]);
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ret = -EINVAL;
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}
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return ret;
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}
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/*
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* Function ircomm_state_conn (self, event, skb)
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*
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* IrCOMM is connected to the peer IrCOMM device
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*
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*/
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static int ircomm_state_conn(struct ircomm_cb *self, IRCOMM_EVENT event,
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struct sk_buff *skb, struct ircomm_info *info)
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{
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int ret = 0;
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switch (event) {
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case IRCOMM_DATA_REQUEST:
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ret = self->issue.data_request(self, skb, 0);
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break;
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case IRCOMM_TTP_DATA_INDICATION:
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ircomm_process_data(self, skb);
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break;
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case IRCOMM_LMP_DATA_INDICATION:
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ircomm_data_indication(self, skb);
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break;
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case IRCOMM_CONTROL_REQUEST:
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/* Just send a separate frame for now */
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ret = self->issue.data_request(self, skb, skb->len);
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break;
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case IRCOMM_TTP_DISCONNECT_INDICATION:
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case IRCOMM_LMP_DISCONNECT_INDICATION:
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ircomm_next_state(self, IRCOMM_IDLE);
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ircomm_disconnect_indication(self, skb, info);
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break;
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case IRCOMM_DISCONNECT_REQUEST:
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ircomm_next_state(self, IRCOMM_IDLE);
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ret = self->issue.disconnect_request(self, skb, info);
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break;
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default:
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pr_debug("%s(), unknown event = %s\n", __func__ ,
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ircomm_event[event]);
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ret = -EINVAL;
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}
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return ret;
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}
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/*
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* Function ircomm_do_event (self, event, skb)
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*
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* Process event
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*
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*/
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int ircomm_do_event(struct ircomm_cb *self, IRCOMM_EVENT event,
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struct sk_buff *skb, struct ircomm_info *info)
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{
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pr_debug("%s: state=%s, event=%s\n", __func__ ,
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ircomm_state[self->state], ircomm_event[event]);
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return (*state[self->state])(self, event, skb, info);
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}
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/*
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* Function ircomm_next_state (self, state)
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*
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* Switch state
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*
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*/
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void ircomm_next_state(struct ircomm_cb *self, IRCOMM_STATE state)
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{
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self->state = state;
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pr_debug("%s: next state=%s, service type=%d\n", __func__ ,
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ircomm_state[self->state], self->service_type);
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}
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