irlan_provider_event.c
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/*********************************************************************
*
* Filename: irlan_provider_event.c
* Version: 0.9
* Description: IrLAN provider state machine)
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Sun Aug 31 20:14:37 1997
* Modified at: Sat Oct 30 12:52:41 1999
* Modified by: Dag Brattli <dagb@cs.uit.no>
*
* Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>, 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.
*
* Neither Dag Brattli nor University of Tromsø admit liability nor
* provide warranty for any of this software. This material is
* provided "AS-IS" and at no charge.
*
********************************************************************/
#include <net/irda/irda.h>
#include <net/irda/iriap.h>
#include <net/irda/irlmp.h>
#include <net/irda/irttp.h>
#include <net/irda/irlan_provider.h>
#include <net/irda/irlan_event.h>
static int irlan_provider_state_idle(struct irlan_cb *self, IRLAN_EVENT event,
struct sk_buff *skb);
static int irlan_provider_state_info(struct irlan_cb *self, IRLAN_EVENT event,
struct sk_buff *skb);
static int irlan_provider_state_open(struct irlan_cb *self, IRLAN_EVENT event,
struct sk_buff *skb);
static int irlan_provider_state_data(struct irlan_cb *self, IRLAN_EVENT event,
struct sk_buff *skb);
static int (*state[])(struct irlan_cb *self, IRLAN_EVENT event,
struct sk_buff *skb) =
{
irlan_provider_state_idle,
NULL, /* Query */
NULL, /* Info */
irlan_provider_state_info,
NULL, /* Media */
irlan_provider_state_open,
NULL, /* Wait */
NULL, /* Arb */
irlan_provider_state_data,
NULL, /* Close */
NULL, /* Sync */
};
void irlan_do_provider_event(struct irlan_cb *self, IRLAN_EVENT event,
struct sk_buff *skb)
{
IRDA_ASSERT(*state[ self->provider.state] != NULL, return;);
(*state[self->provider.state]) (self, event, skb);
}
/*
* Function irlan_provider_state_idle (event, skb, info)
*
* IDLE, We are waiting for an indication that there is a provider
* available.
*/
static int irlan_provider_state_idle(struct irlan_cb *self, IRLAN_EVENT event,
struct sk_buff *skb)
{
IRDA_ASSERT(self != NULL, return -1;);
switch(event) {
case IRLAN_CONNECT_INDICATION:
irlan_provider_connect_response( self, self->provider.tsap_ctrl);
irlan_next_provider_state( self, IRLAN_INFO);
break;
default:
pr_debug("%s(), Unknown event %d\n", __func__ , event);
break;
}
if (skb)
dev_kfree_skb(skb);
return 0;
}
/*
* Function irlan_provider_state_info (self, event, skb, info)
*
* INFO, We have issued a GetInfo command and is awaiting a reply.
*/
static int irlan_provider_state_info(struct irlan_cb *self, IRLAN_EVENT event,
struct sk_buff *skb)
{
int ret;
IRDA_ASSERT(self != NULL, return -1;);
switch(event) {
case IRLAN_GET_INFO_CMD:
/* Be sure to use 802.3 in case of peer mode */
if (self->provider.access_type == ACCESS_PEER) {
self->media = MEDIA_802_3;
/* Check if client has started yet */
if (self->client.state == IRLAN_IDLE) {
/* This should get the client going */
irlmp_discovery_request(8);
}
}
irlan_provider_send_reply(self, CMD_GET_PROVIDER_INFO,
RSP_SUCCESS);
/* Keep state */
break;
case IRLAN_GET_MEDIA_CMD:
irlan_provider_send_reply(self, CMD_GET_MEDIA_CHAR,
RSP_SUCCESS);
/* Keep state */
break;
case IRLAN_OPEN_DATA_CMD:
ret = irlan_parse_open_data_cmd(self, skb);
if (self->provider.access_type == ACCESS_PEER) {
/* FIXME: make use of random functions! */
self->provider.send_arb_val = (jiffies & 0xffff);
}
irlan_provider_send_reply(self, CMD_OPEN_DATA_CHANNEL, ret);
if (ret == RSP_SUCCESS) {
irlan_next_provider_state(self, IRLAN_OPEN);
/* Signal client that we are now open */
irlan_do_client_event(self, IRLAN_PROVIDER_SIGNAL, NULL);
}
break;
case IRLAN_LMP_DISCONNECT: /* FALLTHROUGH */
case IRLAN_LAP_DISCONNECT:
irlan_next_provider_state(self, IRLAN_IDLE);
break;
default:
pr_debug("%s(), Unknown event %d\n", __func__ , event);
break;
}
if (skb)
dev_kfree_skb(skb);
return 0;
}
/*
* Function irlan_provider_state_open (self, event, skb, info)
*
* OPEN, The client has issued a OpenData command and is awaiting a
* reply
*
*/
static int irlan_provider_state_open(struct irlan_cb *self, IRLAN_EVENT event,
struct sk_buff *skb)
{
IRDA_ASSERT(self != NULL, return -1;);
switch(event) {
case IRLAN_FILTER_CONFIG_CMD:
irlan_provider_parse_command(self, CMD_FILTER_OPERATION, skb);
irlan_provider_send_reply(self, CMD_FILTER_OPERATION,
RSP_SUCCESS);
/* Keep state */
break;
case IRLAN_DATA_CONNECT_INDICATION:
irlan_next_provider_state(self, IRLAN_DATA);
irlan_provider_connect_response(self, self->tsap_data);
break;
case IRLAN_LMP_DISCONNECT: /* FALLTHROUGH */
case IRLAN_LAP_DISCONNECT:
irlan_next_provider_state(self, IRLAN_IDLE);
break;
default:
pr_debug("%s(), Unknown event %d\n", __func__ , event);
break;
}
if (skb)
dev_kfree_skb(skb);
return 0;
}
/*
* Function irlan_provider_state_data (self, event, skb, info)
*
* DATA, The data channel is connected, allowing data transfers between
* the local and remote machines.
*
*/
static int irlan_provider_state_data(struct irlan_cb *self, IRLAN_EVENT event,
struct sk_buff *skb)
{
IRDA_ASSERT(self != NULL, return -1;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);
switch(event) {
case IRLAN_FILTER_CONFIG_CMD:
irlan_provider_parse_command(self, CMD_FILTER_OPERATION, skb);
irlan_provider_send_reply(self, CMD_FILTER_OPERATION,
RSP_SUCCESS);
break;
case IRLAN_LMP_DISCONNECT: /* FALLTHROUGH */
case IRLAN_LAP_DISCONNECT:
irlan_next_provider_state(self, IRLAN_IDLE);
break;
default:
pr_debug("%s(), Unknown event %d\n", __func__ , event);
break;
}
if (skb)
dev_kfree_skb(skb);
return 0;
}