534 строки
13 KiB
C
534 строки
13 KiB
C
/*********************************************************************
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*
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* Filename: irlan_client_event.c
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* Version: 0.9
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* Description: IrLAN client state machine
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* Status: Experimental.
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* Author: Dag Brattli <dagb@cs.uit.no>
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* Created at: Sun Aug 31 20:14:37 1997
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* Modified at: Sun Dec 26 21:52:24 1999
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* Modified by: Dag Brattli <dagb@cs.uit.no>
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*
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* Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>,
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* 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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* Neither Dag Brattli nor University of Tromsø admit liability nor
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* provide warranty for any of this software. This material is
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* provided "AS-IS" and at no charge.
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*
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********************************************************************/
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#include <linux/skbuff.h>
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#include <net/irda/irda.h>
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#include <net/irda/timer.h>
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#include <net/irda/irmod.h>
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#include <net/irda/iriap.h>
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#include <net/irda/irlmp.h>
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#include <net/irda/irttp.h>
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#include <net/irda/irlan_common.h>
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#include <net/irda/irlan_client.h>
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#include <net/irda/irlan_event.h>
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static int irlan_client_state_idle (struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb);
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static int irlan_client_state_query(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb);
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static int irlan_client_state_conn (struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb);
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static int irlan_client_state_info (struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb);
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static int irlan_client_state_media(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb);
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static int irlan_client_state_open (struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb);
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static int irlan_client_state_wait (struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb);
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static int irlan_client_state_arb (struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb);
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static int irlan_client_state_data (struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb);
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static int irlan_client_state_close(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb);
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static int irlan_client_state_sync (struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb);
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static int (*state[])(struct irlan_cb *, IRLAN_EVENT event, struct sk_buff *) =
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{
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irlan_client_state_idle,
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irlan_client_state_query,
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irlan_client_state_conn,
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irlan_client_state_info,
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irlan_client_state_media,
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irlan_client_state_open,
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irlan_client_state_wait,
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irlan_client_state_arb,
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irlan_client_state_data,
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irlan_client_state_close,
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irlan_client_state_sync
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};
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void irlan_do_client_event(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_ASSERT(self != NULL, return;);
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IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
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(*state[ self->client.state]) (self, event, skb);
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}
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/*
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* Function irlan_client_state_idle (event, skb, info)
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*
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* IDLE, We are waiting for an indication that there is a provider
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* available.
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*/
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static int irlan_client_state_idle(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
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IRDA_ASSERT(self != NULL, return -1;);
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IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);
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switch (event) {
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case IRLAN_DISCOVERY_INDICATION:
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if (self->client.iriap) {
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IRDA_WARNING("%s(), busy with a previous query\n",
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__FUNCTION__);
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return -EBUSY;
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}
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self->client.iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
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irlan_client_get_value_confirm);
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/* Get some values from peer IAS */
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irlan_next_client_state(self, IRLAN_QUERY);
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iriap_getvaluebyclass_request(self->client.iriap,
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self->saddr, self->daddr,
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"IrLAN", "IrDA:TinyTP:LsapSel");
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break;
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case IRLAN_WATCHDOG_TIMEOUT:
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IRDA_DEBUG(2, "%s(), IRLAN_WATCHDOG_TIMEOUT\n", __FUNCTION__ );
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break;
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default:
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IRDA_DEBUG(4, "%s(), Unknown event %d\n", __FUNCTION__ , event);
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break;
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}
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if (skb)
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dev_kfree_skb(skb);
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return 0;
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}
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/*
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* Function irlan_client_state_query (event, skb, info)
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*
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* QUERY, We have queryed the remote IAS and is ready to connect
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* to provider, just waiting for the confirm.
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*
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*/
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static int irlan_client_state_query(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
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IRDA_ASSERT(self != NULL, return -1;);
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IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);
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switch(event) {
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case IRLAN_IAS_PROVIDER_AVAIL:
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IRDA_ASSERT(self->dtsap_sel_ctrl != 0, return -1;);
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self->client.open_retries = 0;
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irttp_connect_request(self->client.tsap_ctrl,
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self->dtsap_sel_ctrl,
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self->saddr, self->daddr, NULL,
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IRLAN_MTU, NULL);
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irlan_next_client_state(self, IRLAN_CONN);
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break;
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case IRLAN_IAS_PROVIDER_NOT_AVAIL:
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IRDA_DEBUG(2, "%s(), IAS_PROVIDER_NOT_AVAIL\n", __FUNCTION__ );
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irlan_next_client_state(self, IRLAN_IDLE);
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/* Give the client a kick! */
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if ((self->provider.access_type == ACCESS_PEER) &&
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(self->provider.state != IRLAN_IDLE))
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irlan_client_wakeup(self, self->saddr, self->daddr);
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break;
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case IRLAN_LMP_DISCONNECT:
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case IRLAN_LAP_DISCONNECT:
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irlan_next_client_state(self, IRLAN_IDLE);
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break;
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case IRLAN_WATCHDOG_TIMEOUT:
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IRDA_DEBUG(2, "%s(), IRLAN_WATCHDOG_TIMEOUT\n", __FUNCTION__ );
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break;
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default:
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IRDA_DEBUG(2, "%s(), Unknown event %d\n", __FUNCTION__ , event);
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break;
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}
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if (skb)
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dev_kfree_skb(skb);
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return 0;
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}
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/*
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* Function irlan_client_state_conn (event, skb, info)
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*
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* CONN, We have connected to a provider but has not issued any
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* commands yet.
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*
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*/
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static int irlan_client_state_conn(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
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IRDA_ASSERT(self != NULL, return -1;);
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switch (event) {
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case IRLAN_CONNECT_COMPLETE:
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/* Send getinfo cmd */
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irlan_get_provider_info(self);
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irlan_next_client_state(self, IRLAN_INFO);
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break;
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case IRLAN_LMP_DISCONNECT:
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case IRLAN_LAP_DISCONNECT:
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irlan_next_client_state(self, IRLAN_IDLE);
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break;
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case IRLAN_WATCHDOG_TIMEOUT:
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IRDA_DEBUG(2, "%s(), IRLAN_WATCHDOG_TIMEOUT\n", __FUNCTION__ );
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break;
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default:
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IRDA_DEBUG(2, "%s(), Unknown event %d\n", __FUNCTION__ , event);
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break;
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}
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if (skb)
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dev_kfree_skb(skb);
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return 0;
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}
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/*
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* Function irlan_client_state_info (self, event, skb, info)
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*
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* INFO, We have issued a GetInfo command and is awaiting a reply.
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*/
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static int irlan_client_state_info(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
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IRDA_ASSERT(self != NULL, return -1;);
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switch (event) {
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case IRLAN_DATA_INDICATION:
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IRDA_ASSERT(skb != NULL, return -1;);
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irlan_client_parse_response(self, skb);
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irlan_next_client_state(self, IRLAN_MEDIA);
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irlan_get_media_char(self);
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break;
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case IRLAN_LMP_DISCONNECT:
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case IRLAN_LAP_DISCONNECT:
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irlan_next_client_state(self, IRLAN_IDLE);
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break;
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case IRLAN_WATCHDOG_TIMEOUT:
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IRDA_DEBUG(2, "%s(), IRLAN_WATCHDOG_TIMEOUT\n", __FUNCTION__ );
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break;
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default:
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IRDA_DEBUG(2, "%s(), Unknown event %d\n", __FUNCTION__ , event);
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break;
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}
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if (skb)
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dev_kfree_skb(skb);
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return 0;
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}
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/*
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* Function irlan_client_state_media (self, event, skb, info)
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*
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* MEDIA, The irlan_client has issued a GetMedia command and is awaiting a
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* reply.
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*
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*/
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static int irlan_client_state_media(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
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IRDA_ASSERT(self != NULL, return -1;);
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switch(event) {
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case IRLAN_DATA_INDICATION:
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irlan_client_parse_response(self, skb);
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irlan_open_data_channel(self);
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irlan_next_client_state(self, IRLAN_OPEN);
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break;
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case IRLAN_LMP_DISCONNECT:
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case IRLAN_LAP_DISCONNECT:
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irlan_next_client_state(self, IRLAN_IDLE);
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break;
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case IRLAN_WATCHDOG_TIMEOUT:
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IRDA_DEBUG(2, "%s(), IRLAN_WATCHDOG_TIMEOUT\n", __FUNCTION__ );
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break;
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default:
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IRDA_DEBUG(2, "%s(), Unknown event %d\n", __FUNCTION__ , event);
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break;
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}
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if (skb)
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dev_kfree_skb(skb);
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return 0;
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}
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/*
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* Function irlan_client_state_open (self, event, skb, info)
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*
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* OPEN, The irlan_client has issued a OpenData command and is awaiting a
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* reply
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*
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*/
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static int irlan_client_state_open(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb)
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{
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struct qos_info qos;
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IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
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IRDA_ASSERT(self != NULL, return -1;);
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switch(event) {
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case IRLAN_DATA_INDICATION:
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irlan_client_parse_response(self, skb);
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/*
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* Check if we have got the remote TSAP for data
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* communications
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*/
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IRDA_ASSERT(self->dtsap_sel_data != 0, return -1;);
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/* Check which access type we are dealing with */
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switch (self->client.access_type) {
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case ACCESS_PEER:
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if (self->provider.state == IRLAN_OPEN) {
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irlan_next_client_state(self, IRLAN_ARB);
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irlan_do_client_event(self, IRLAN_CHECK_CON_ARB,
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NULL);
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} else {
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irlan_next_client_state(self, IRLAN_WAIT);
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}
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break;
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case ACCESS_DIRECT:
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case ACCESS_HOSTED:
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qos.link_disc_time.bits = 0x01; /* 3 secs */
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irttp_connect_request(self->tsap_data,
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self->dtsap_sel_data,
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self->saddr, self->daddr, &qos,
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IRLAN_MTU, NULL);
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irlan_next_client_state(self, IRLAN_DATA);
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break;
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default:
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IRDA_DEBUG(2, "%s(), unknown access type!\n", __FUNCTION__ );
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break;
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}
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break;
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case IRLAN_LMP_DISCONNECT:
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case IRLAN_LAP_DISCONNECT:
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irlan_next_client_state(self, IRLAN_IDLE);
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break;
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case IRLAN_WATCHDOG_TIMEOUT:
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IRDA_DEBUG(2, "%s(), IRLAN_WATCHDOG_TIMEOUT\n", __FUNCTION__ );
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break;
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default:
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IRDA_DEBUG(2, "%s(), Unknown event %d\n", __FUNCTION__ , event);
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break;
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}
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if (skb)
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dev_kfree_skb(skb);
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return 0;
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}
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/*
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* Function irlan_client_state_wait (self, event, skb, info)
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*
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* WAIT, The irlan_client is waiting for the local provider to enter the
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* provider OPEN state.
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*
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*/
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static int irlan_client_state_wait(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
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IRDA_ASSERT(self != NULL, return -1;);
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switch(event) {
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case IRLAN_PROVIDER_SIGNAL:
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irlan_next_client_state(self, IRLAN_ARB);
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irlan_do_client_event(self, IRLAN_CHECK_CON_ARB, NULL);
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break;
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case IRLAN_LMP_DISCONNECT:
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case IRLAN_LAP_DISCONNECT:
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irlan_next_client_state(self, IRLAN_IDLE);
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break;
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case IRLAN_WATCHDOG_TIMEOUT:
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IRDA_DEBUG(2, "%s(), IRLAN_WATCHDOG_TIMEOUT\n", __FUNCTION__ );
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break;
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default:
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IRDA_DEBUG(2, "%s(), Unknown event %d\n", __FUNCTION__ , event);
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break;
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}
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if (skb)
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dev_kfree_skb(skb);
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return 0;
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}
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static int irlan_client_state_arb(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb)
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{
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struct qos_info qos;
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IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
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IRDA_ASSERT(self != NULL, return -1;);
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switch(event) {
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case IRLAN_CHECK_CON_ARB:
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if (self->client.recv_arb_val == self->provider.send_arb_val) {
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irlan_next_client_state(self, IRLAN_CLOSE);
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irlan_close_data_channel(self);
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} else if (self->client.recv_arb_val <
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self->provider.send_arb_val)
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{
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qos.link_disc_time.bits = 0x01; /* 3 secs */
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irlan_next_client_state(self, IRLAN_DATA);
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irttp_connect_request(self->tsap_data,
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self->dtsap_sel_data,
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self->saddr, self->daddr, &qos,
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IRLAN_MTU, NULL);
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} else if (self->client.recv_arb_val >
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self->provider.send_arb_val)
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{
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IRDA_DEBUG(2, "%s(), lost the battle :-(\n", __FUNCTION__ );
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}
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break;
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case IRLAN_DATA_CONNECT_INDICATION:
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irlan_next_client_state(self, IRLAN_DATA);
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break;
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case IRLAN_LMP_DISCONNECT:
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case IRLAN_LAP_DISCONNECT:
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irlan_next_client_state(self, IRLAN_IDLE);
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break;
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case IRLAN_WATCHDOG_TIMEOUT:
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IRDA_DEBUG(2, "%s(), IRLAN_WATCHDOG_TIMEOUT\n", __FUNCTION__ );
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break;
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default:
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IRDA_DEBUG(2, "%s(), Unknown event %d\n", __FUNCTION__ , event);
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break;
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}
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if (skb)
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dev_kfree_skb(skb);
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return 0;
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}
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/*
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* Function irlan_client_state_data (self, event, skb, info)
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*
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* DATA, The data channel is connected, allowing data transfers between
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* the local and remote machines.
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*
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*/
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static int irlan_client_state_data(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
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IRDA_ASSERT(self != NULL, return -1;);
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IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);
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switch(event) {
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case IRLAN_DATA_INDICATION:
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irlan_client_parse_response(self, skb);
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break;
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case IRLAN_LMP_DISCONNECT: /* FALLTHROUGH */
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case IRLAN_LAP_DISCONNECT:
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irlan_next_client_state(self, IRLAN_IDLE);
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break;
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default:
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IRDA_DEBUG(2, "%s(), Unknown event %d\n", __FUNCTION__ , event);
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break;
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}
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if (skb)
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dev_kfree_skb(skb);
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return 0;
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}
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/*
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* Function irlan_client_state_close (self, event, skb, info)
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*
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*
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*
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*/
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static int irlan_client_state_close(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
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if (skb)
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dev_kfree_skb(skb);
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return 0;
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}
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/*
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* Function irlan_client_state_sync (self, event, skb, info)
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*
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*
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*
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*/
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static int irlan_client_state_sync(struct irlan_cb *self, IRLAN_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
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if (skb)
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dev_kfree_skb(skb);
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return 0;
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}
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