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tegrakernel/kernel/kernel-4.9/net/irda/irlan/irlan_client_event.c

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/*********************************************************************
*
* 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_ASSERT(self != NULL, return -1;);
IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);
switch (event) {
case IRLAN_DISCOVERY_INDICATION:
if (self->client.iriap) {
net_warn_ratelimited("%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:
pr_debug("%s(), IRLAN_WATCHDOG_TIMEOUT\n", __func__);
break;
default:
pr_debug("%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_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:
pr_debug("%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:
pr_debug("%s(), IRLAN_WATCHDOG_TIMEOUT\n", __func__);
break;
default:
pr_debug("%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_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:
pr_debug("%s(), IRLAN_WATCHDOG_TIMEOUT\n", __func__);
break;
default:
pr_debug("%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_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:
pr_debug("%s(), IRLAN_WATCHDOG_TIMEOUT\n", __func__);
break;
default:
pr_debug("%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_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:
pr_debug("%s(), IRLAN_WATCHDOG_TIMEOUT\n", __func__);
break;
default:
pr_debug("%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_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:
pr_debug("%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:
pr_debug("%s(), IRLAN_WATCHDOG_TIMEOUT\n", __func__);
break;
default:
pr_debug("%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_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:
pr_debug("%s(), IRLAN_WATCHDOG_TIMEOUT\n", __func__);
break;
default:
pr_debug("%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_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)
{
pr_debug("%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:
pr_debug("%s(), IRLAN_WATCHDOG_TIMEOUT\n", __func__);
break;
default:
pr_debug("%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_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:
pr_debug("%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)
{
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)
{
if (skb)
dev_kfree_skb(skb);
return 0;
}
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