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