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linux-sg2042/net/irda/irlmp_event.c

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/*********************************************************************
*
* Filename: irlmp_event.c
* Version: 0.8
* Description: An IrDA LMP event driver for Linux
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Mon Aug 4 20:40:53 1997
* Modified at: Tue Dec 14 23:04:16 1999
* Modified by: Dag Brattli <dagb@cs.uit.no>
*
* Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>,
* All Rights Reserved.
* Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
*
* 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/kernel.h>
#include <net/irda/irda.h>
#include <net/irda/timer.h>
#include <net/irda/irlap.h>
#include <net/irda/irlmp.h>
#include <net/irda/irlmp_frame.h>
#include <net/irda/irlmp_event.h>
const char *irlmp_state[] = {
"LAP_STANDBY",
"LAP_U_CONNECT",
"LAP_ACTIVE",
};
const char *irlsap_state[] = {
"LSAP_DISCONNECTED",
"LSAP_CONNECT",
"LSAP_CONNECT_PEND",
"LSAP_DATA_TRANSFER_READY",
"LSAP_SETUP",
"LSAP_SETUP_PEND",
};
#ifdef CONFIG_IRDA_DEBUG
static const char *irlmp_event[] = {
"LM_CONNECT_REQUEST",
"LM_CONNECT_CONFIRM",
"LM_CONNECT_RESPONSE",
"LM_CONNECT_INDICATION",
"LM_DISCONNECT_INDICATION",
"LM_DISCONNECT_REQUEST",
"LM_DATA_REQUEST",
"LM_UDATA_REQUEST",
"LM_DATA_INDICATION",
"LM_UDATA_INDICATION",
"LM_WATCHDOG_TIMEOUT",
/* IrLAP events */
"LM_LAP_CONNECT_REQUEST",
"LM_LAP_CONNECT_INDICATION",
"LM_LAP_CONNECT_CONFIRM",
"LM_LAP_DISCONNECT_INDICATION",
"LM_LAP_DISCONNECT_REQUEST",
"LM_LAP_DISCOVERY_REQUEST",
"LM_LAP_DISCOVERY_CONFIRM",
"LM_LAP_IDLE_TIMEOUT",
};
#endif /* CONFIG_IRDA_DEBUG */
/* LAP Connection control proto declarations */
static void irlmp_state_standby (struct lap_cb *, IRLMP_EVENT,
struct sk_buff *);
static void irlmp_state_u_connect(struct lap_cb *, IRLMP_EVENT,
struct sk_buff *);
static void irlmp_state_active (struct lap_cb *, IRLMP_EVENT,
struct sk_buff *);
/* LSAP Connection control proto declarations */
static int irlmp_state_disconnected(struct lsap_cb *, IRLMP_EVENT,
struct sk_buff *);
static int irlmp_state_connect (struct lsap_cb *, IRLMP_EVENT,
struct sk_buff *);
static int irlmp_state_connect_pend(struct lsap_cb *, IRLMP_EVENT,
struct sk_buff *);
static int irlmp_state_dtr (struct lsap_cb *, IRLMP_EVENT,
struct sk_buff *);
static int irlmp_state_setup (struct lsap_cb *, IRLMP_EVENT,
struct sk_buff *);
static int irlmp_state_setup_pend (struct lsap_cb *, IRLMP_EVENT,
struct sk_buff *);
static void (*lap_state[]) (struct lap_cb *, IRLMP_EVENT, struct sk_buff *) =
{
irlmp_state_standby,
irlmp_state_u_connect,
irlmp_state_active,
};
static int (*lsap_state[])( struct lsap_cb *, IRLMP_EVENT, struct sk_buff *) =
{
irlmp_state_disconnected,
irlmp_state_connect,
irlmp_state_connect_pend,
irlmp_state_dtr,
irlmp_state_setup,
irlmp_state_setup_pend
};
static inline void irlmp_next_lap_state(struct lap_cb *self,
IRLMP_STATE state)
{
/*
IRDA_DEBUG(4, "%s(), LMP LAP = %s\n", __FUNCTION__, irlmp_state[state]);
*/
self->lap_state = state;
}
static inline void irlmp_next_lsap_state(struct lsap_cb *self,
LSAP_STATE state)
{
/*
IRDA_ASSERT(self != NULL, return;);
IRDA_DEBUG(4, "%s(), LMP LSAP = %s\n", __FUNCTION__, irlsap_state[state]);
*/
self->lsap_state = state;
}
/* Do connection control events */
int irlmp_do_lsap_event(struct lsap_cb *self, IRLMP_EVENT event,
struct sk_buff *skb)
{
IRDA_ASSERT(self != NULL, return -1;);
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
IRDA_DEBUG(4, "%s(), EVENT = %s, STATE = %s\n",
__FUNCTION__, irlmp_event[event], irlsap_state[ self->lsap_state]);
return (*lsap_state[self->lsap_state]) (self, event, skb);
}
/*
* Function do_lap_event (event, skb, info)
*
* Do IrLAP control events
*
*/
void irlmp_do_lap_event(struct lap_cb *self, IRLMP_EVENT event,
struct sk_buff *skb)
{
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == LMP_LAP_MAGIC, return;);
IRDA_DEBUG(4, "%s(), EVENT = %s, STATE = %s\n", __FUNCTION__,
irlmp_event[event],
irlmp_state[self->lap_state]);
(*lap_state[self->lap_state]) (self, event, skb);
}
void irlmp_discovery_timer_expired(void *data)
{
IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
/* We always cleanup the log (active & passive discovery) */
irlmp_do_expiry();
irlmp_do_discovery(sysctl_discovery_slots);
/* Restart timer */
irlmp_start_discovery_timer(irlmp, sysctl_discovery_timeout * HZ);
}
void irlmp_watchdog_timer_expired(void *data)
{
struct lsap_cb *self = (struct lsap_cb *) data;
IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
irlmp_do_lsap_event(self, LM_WATCHDOG_TIMEOUT, NULL);
}
void irlmp_idle_timer_expired(void *data)
{
struct lap_cb *self = (struct lap_cb *) data;
IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == LMP_LAP_MAGIC, return;);
irlmp_do_lap_event(self, LM_LAP_IDLE_TIMEOUT, NULL);
}
/*
* Send an event on all LSAPs attached to this LAP.
*/
static inline void
irlmp_do_all_lsap_event(hashbin_t * lsap_hashbin,
IRLMP_EVENT event)
{
struct lsap_cb *lsap;
struct lsap_cb *lsap_next;
/* Note : this function use the new hashbin_find_next()
* function, instead of the old hashbin_get_next().
* This make sure that we are always pointing one lsap
* ahead, so that if the current lsap is removed as the
* result of sending the event, we don't care.
* Also, as we store the context ourselves, if an enumeration
* of the same lsap hashbin happens as the result of sending the
* event, we don't care.
* The only problem is if the next lsap is removed. In that case,
* hashbin_find_next() will return NULL and we will abort the
* enumeration. - Jean II */
/* Also : we don't accept any skb in input. We can *NOT* pass
* the same skb to multiple clients safely, we would need to
* skb_clone() it. - Jean II */
lsap = (struct lsap_cb *) hashbin_get_first(lsap_hashbin);
while (NULL != hashbin_find_next(lsap_hashbin,
(long) lsap,
NULL,
(void *) &lsap_next) ) {
irlmp_do_lsap_event(lsap, event, NULL);
lsap = lsap_next;
}
}
/*********************************************************************
*
* LAP connection control states
*
********************************************************************/
/*
* Function irlmp_state_standby (event, skb, info)
*
* STANDBY, The IrLAP connection does not exist.
*
*/
static void irlmp_state_standby(struct lap_cb *self, IRLMP_EVENT event,
struct sk_buff *skb)
{
IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
IRDA_ASSERT(self->irlap != NULL, return;);
switch (event) {
case LM_LAP_DISCOVERY_REQUEST:
/* irlmp_next_station_state( LMP_DISCOVER); */
irlap_discovery_request(self->irlap, &irlmp->discovery_cmd);
break;
case LM_LAP_CONNECT_INDICATION:
/* It's important to switch state first, to avoid IrLMP to
* think that the link is free since IrLMP may then start
* discovery before the connection is properly set up. DB.
*/
irlmp_next_lap_state(self, LAP_ACTIVE);
/* Just accept connection TODO, this should be fixed */
irlap_connect_response(self->irlap, skb);
break;
case LM_LAP_CONNECT_REQUEST:
IRDA_DEBUG(4, "%s() LS_CONNECT_REQUEST\n", __FUNCTION__);
irlmp_next_lap_state(self, LAP_U_CONNECT);
/* FIXME: need to set users requested QoS */
irlap_connect_request(self->irlap, self->daddr, NULL, 0);
break;
case LM_LAP_DISCONNECT_INDICATION:
IRDA_DEBUG(4, "%s(), Error LM_LAP_DISCONNECT_INDICATION\n",
__FUNCTION__);
irlmp_next_lap_state(self, LAP_STANDBY);
break;
default:
IRDA_DEBUG(0, "%s(), Unknown event %s\n",
__FUNCTION__, irlmp_event[event]);
break;
}
}
/*
* Function irlmp_state_u_connect (event, skb, info)
*
* U_CONNECT, The layer above has tried to open an LSAP connection but
* since the IrLAP connection does not exist, we must first start an
* IrLAP connection. We are now waiting response from IrLAP.
* */
static void irlmp_state_u_connect(struct lap_cb *self, IRLMP_EVENT event,
struct sk_buff *skb)
{
IRDA_DEBUG(2, "%s(), event=%s\n", __FUNCTION__, irlmp_event[event]);
switch (event) {
case LM_LAP_CONNECT_INDICATION:
/* It's important to switch state first, to avoid IrLMP to
* think that the link is free since IrLMP may then start
* discovery before the connection is properly set up. DB.
*/
irlmp_next_lap_state(self, LAP_ACTIVE);
/* Just accept connection TODO, this should be fixed */
irlap_connect_response(self->irlap, skb);
/* Tell LSAPs that they can start sending data */
irlmp_do_all_lsap_event(self->lsaps, LM_LAP_CONNECT_CONFIRM);
/* Note : by the time we get there (LAP retries and co),
* the lsaps may already have gone. This avoid getting stuck
* forever in LAP_ACTIVE state - Jean II */
if (HASHBIN_GET_SIZE(self->lsaps) == 0) {
IRDA_DEBUG(0, "%s() NO LSAPs !\n", __FUNCTION__);
irlmp_start_idle_timer(self, LM_IDLE_TIMEOUT);
}
break;
case LM_LAP_CONNECT_REQUEST:
/* Already trying to connect */
break;
case LM_LAP_CONNECT_CONFIRM:
/* For all lsap_ce E Associated do LS_Connect_confirm */
irlmp_next_lap_state(self, LAP_ACTIVE);
/* Tell LSAPs that they can start sending data */
irlmp_do_all_lsap_event(self->lsaps, LM_LAP_CONNECT_CONFIRM);
/* Note : by the time we get there (LAP retries and co),
* the lsaps may already have gone. This avoid getting stuck
* forever in LAP_ACTIVE state - Jean II */
if (HASHBIN_GET_SIZE(self->lsaps) == 0) {
IRDA_DEBUG(0, "%s() NO LSAPs !\n", __FUNCTION__);
irlmp_start_idle_timer(self, LM_IDLE_TIMEOUT);
}
break;
case LM_LAP_DISCONNECT_INDICATION:
IRDA_DEBUG(4, "%s(), LM_LAP_DISCONNECT_INDICATION\n", __FUNCTION__);
irlmp_next_lap_state(self, LAP_STANDBY);
/* Send disconnect event to all LSAPs using this link */
irlmp_do_all_lsap_event(self->lsaps,
LM_LAP_DISCONNECT_INDICATION);
break;
case LM_LAP_DISCONNECT_REQUEST:
IRDA_DEBUG(4, "%s(), LM_LAP_DISCONNECT_REQUEST\n", __FUNCTION__);
/* One of the LSAP did timeout or was closed, if it was
* the last one, try to get out of here - Jean II */
if (HASHBIN_GET_SIZE(self->lsaps) <= 1) {
irlap_disconnect_request(self->irlap);
}
break;
default:
IRDA_DEBUG(0, "%s(), Unknown event %s\n",
__FUNCTION__, irlmp_event[event]);
break;
}
}
/*
* Function irlmp_state_active (event, skb, info)
*
* ACTIVE, IrLAP connection is active
*
*/
static void irlmp_state_active(struct lap_cb *self, IRLMP_EVENT event,
struct sk_buff *skb)
{
IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
switch (event) {
case LM_LAP_CONNECT_REQUEST:
IRDA_DEBUG(4, "%s(), LS_CONNECT_REQUEST\n", __FUNCTION__);
/*
* IrLAP may have a pending disconnect. We tried to close
* IrLAP, but it was postponed because the link was
* busy or we were still sending packets. As we now
* need it, make sure it stays on. Jean II
*/
irlap_clear_disconnect(self->irlap);
/*
* LAP connection already active, just bounce back! Since we
* don't know which LSAP that tried to do this, we have to
* notify all LSAPs using this LAP, but that should be safe to
* do anyway.
*/
irlmp_do_all_lsap_event(self->lsaps, LM_LAP_CONNECT_CONFIRM);
/* Needed by connect indication */
irlmp_do_all_lsap_event(irlmp->unconnected_lsaps,
LM_LAP_CONNECT_CONFIRM);
/* Keep state */
break;
case LM_LAP_DISCONNECT_REQUEST:
/*
* Need to find out if we should close IrLAP or not. If there
* is only one LSAP connection left on this link, that LSAP
* must be the one that tries to close IrLAP. It will be
* removed later and moved to the list of unconnected LSAPs
*/
if (HASHBIN_GET_SIZE(self->lsaps) > 0) {
/* Timer value is checked in irsysctl - Jean II */
irlmp_start_idle_timer(self, sysctl_lap_keepalive_time * HZ / 1000);
} else {
/* No more connections, so close IrLAP */
/* We don't want to change state just yet, because
* we want to reflect accurately the real state of
* the LAP, not the state we wish it was in,
* so that we don't lose LM_LAP_CONNECT_REQUEST.
* In some cases, IrLAP won't close the LAP
* immediately. For example, it might still be
* retrying packets or waiting for the pf bit.
* As the LAP always send a DISCONNECT_INDICATION
* in PCLOSE or SCLOSE, just change state on that.
* Jean II */
irlap_disconnect_request(self->irlap);
}
break;
case LM_LAP_IDLE_TIMEOUT:
if (HASHBIN_GET_SIZE(self->lsaps) == 0) {
/* Same reasoning as above - keep state */
irlap_disconnect_request(self->irlap);
}
break;
case LM_LAP_DISCONNECT_INDICATION:
irlmp_next_lap_state(self, LAP_STANDBY);
/* In some case, at this point our side has already closed
* all lsaps, and we are waiting for the idle_timer to
* expire. If another device reconnect immediately, the
* idle timer will expire in the midle of the connection
* initialisation, screwing up things a lot...
* Therefore, we must stop the timer... */
irlmp_stop_idle_timer(self);
/*
* Inform all connected LSAP's using this link
*/
irlmp_do_all_lsap_event(self->lsaps,
LM_LAP_DISCONNECT_INDICATION);
/* Force an expiry of the discovery log.
* Now that the LAP is free, the system may attempt to
* connect to another device. Unfortunately, our entries
* are stale. There is a small window (<3s) before the
* normal discovery will run and where irlmp_connect_request()
* can get the wrong info, so make sure things get
* cleaned *NOW* ;-) - Jean II */
irlmp_do_expiry();
break;
default:
IRDA_DEBUG(0, "%s(), Unknown event %s\n",
__FUNCTION__, irlmp_event[event]);
break;
}
}
/*********************************************************************
*
* LSAP connection control states
*
********************************************************************/
/*
* Function irlmp_state_disconnected (event, skb, info)
*
* DISCONNECTED
*
*/
static int irlmp_state_disconnected(struct lsap_cb *self, IRLMP_EVENT event,
struct sk_buff *skb)
{
int ret = 0;
IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
IRDA_ASSERT(self != NULL, return -1;);
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
switch (event) {
#ifdef CONFIG_IRDA_ULTRA
case LM_UDATA_INDICATION:
/* This is most bizzare. Those packets are aka unreliable
* connected, aka IrLPT or SOCK_DGRAM/IRDAPROTO_UNITDATA.
* Why do we pass them as Ultra ??? Jean II */
irlmp_connless_data_indication(self, skb);
break;
#endif /* CONFIG_IRDA_ULTRA */
case LM_CONNECT_REQUEST:
IRDA_DEBUG(4, "%s(), LM_CONNECT_REQUEST\n", __FUNCTION__);
if (self->conn_skb) {
IRDA_WARNING("%s: busy with another request!\n",
__FUNCTION__);
return -EBUSY;
}
/* Don't forget to refcount it (see irlmp_connect_request()) */
skb_get(skb);
self->conn_skb = skb;
irlmp_next_lsap_state(self, LSAP_SETUP_PEND);
/* Start watchdog timer (5 secs for now) */
irlmp_start_watchdog_timer(self, 5*HZ);
irlmp_do_lap_event(self->lap, LM_LAP_CONNECT_REQUEST, NULL);
break;
case LM_CONNECT_INDICATION:
if (self->conn_skb) {
IRDA_WARNING("%s: busy with another request!\n",
__FUNCTION__);
return -EBUSY;
}
/* Don't forget to refcount it (see irlap_driver_rcv()) */
skb_get(skb);
self->conn_skb = skb;
irlmp_next_lsap_state(self, LSAP_CONNECT_PEND);
/* Start watchdog timer
* This is not mentionned in the spec, but there is a rare
* race condition that can get the socket stuck.
* If we receive this event while our LAP is closing down,
* the LM_LAP_CONNECT_REQUEST get lost and we get stuck in
* CONNECT_PEND state forever.
* The other cause of getting stuck down there is if the
* higher layer never reply to the CONNECT_INDICATION.
* Anyway, it make sense to make sure that we always have
* a backup plan. 1 second is plenty (should be immediate).
* Jean II */
irlmp_start_watchdog_timer(self, 1*HZ);
irlmp_do_lap_event(self->lap, LM_LAP_CONNECT_REQUEST, NULL);
break;
default:
IRDA_DEBUG(1, "%s(), Unknown event %s on LSAP %#02x\n",
__FUNCTION__, irlmp_event[event], self->slsap_sel);
break;
}
return ret;
}
/*
* Function irlmp_state_connect (self, event, skb)
*
* CONNECT
*
*/
static int irlmp_state_connect(struct lsap_cb *self, IRLMP_EVENT event,
struct sk_buff *skb)
{
struct lsap_cb *lsap;
int ret = 0;
IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
IRDA_ASSERT(self != NULL, return -1;);
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
switch (event) {
case LM_CONNECT_RESPONSE:
/*
* Bind this LSAP to the IrLAP link where the connect was
* received
*/
lsap = hashbin_remove(irlmp->unconnected_lsaps, (long) self,
NULL);
IRDA_ASSERT(lsap == self, return -1;);
IRDA_ASSERT(self->lap != NULL, return -1;);
IRDA_ASSERT(self->lap->lsaps != NULL, return -1;);
hashbin_insert(self->lap->lsaps, (irda_queue_t *) self,
(long) self, NULL);
set_bit(0, &self->connected); /* TRUE */
irlmp_send_lcf_pdu(self->lap, self->dlsap_sel,
self->slsap_sel, CONNECT_CNF, skb);
del_timer(&self->watchdog_timer);
irlmp_next_lsap_state(self, LSAP_DATA_TRANSFER_READY);
break;
case LM_WATCHDOG_TIMEOUT:
/* May happen, who knows...
* Jean II */
IRDA_DEBUG(0, "%s() WATCHDOG_TIMEOUT!\n", __FUNCTION__);
/* Disconnect, get out... - Jean II */
self->lap = NULL;
self->dlsap_sel = LSAP_ANY;
irlmp_next_lsap_state(self, LSAP_DISCONNECTED);
break;
default:
/* LM_LAP_DISCONNECT_INDICATION : Should never happen, we
* are *not* yet bound to the IrLAP link. Jean II */
IRDA_DEBUG(0, "%s(), Unknown event %s on LSAP %#02x\n",
__FUNCTION__, irlmp_event[event], self->slsap_sel);
break;
}
return ret;
}
/*
* Function irlmp_state_connect_pend (event, skb, info)
*
* CONNECT_PEND
*
*/
static int irlmp_state_connect_pend(struct lsap_cb *self, IRLMP_EVENT event,
struct sk_buff *skb)
{
struct sk_buff *tx_skb;
int ret = 0;
IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
IRDA_ASSERT(self != NULL, return -1;);
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
switch (event) {
case LM_CONNECT_REQUEST:
/* Keep state */
break;
case LM_CONNECT_RESPONSE:
IRDA_DEBUG(0, "%s(), LM_CONNECT_RESPONSE, "
"no indication issued yet\n", __FUNCTION__);
/* Keep state */
break;
case LM_DISCONNECT_REQUEST:
IRDA_DEBUG(0, "%s(), LM_DISCONNECT_REQUEST, "
"not yet bound to IrLAP connection\n", __FUNCTION__);
/* Keep state */
break;
case LM_LAP_CONNECT_CONFIRM:
IRDA_DEBUG(4, "%s(), LS_CONNECT_CONFIRM\n", __FUNCTION__);
irlmp_next_lsap_state(self, LSAP_CONNECT);
tx_skb = self->conn_skb;
self->conn_skb = NULL;
irlmp_connect_indication(self, tx_skb);
/* Drop reference count - see irlmp_connect_indication(). */
dev_kfree_skb(tx_skb);
break;
case LM_WATCHDOG_TIMEOUT:
/* Will happen in some rare cases because of a race condition.
* Just make sure we don't stay there forever...
* Jean II */
IRDA_DEBUG(0, "%s() WATCHDOG_TIMEOUT!\n", __FUNCTION__);
/* Go back to disconnected mode, keep the socket waiting */
self->lap = NULL;
self->dlsap_sel = LSAP_ANY;
if(self->conn_skb)
dev_kfree_skb(self->conn_skb);
self->conn_skb = NULL;
irlmp_next_lsap_state(self, LSAP_DISCONNECTED);
break;
default:
/* LM_LAP_DISCONNECT_INDICATION : Should never happen, we
* are *not* yet bound to the IrLAP link. Jean II */
IRDA_DEBUG(0, "%s(), Unknown event %s on LSAP %#02x\n",
__FUNCTION__, irlmp_event[event], self->slsap_sel);
break;
}
return ret;
}
/*
* Function irlmp_state_dtr (self, event, skb)
*
* DATA_TRANSFER_READY
*
*/
static int irlmp_state_dtr(struct lsap_cb *self, IRLMP_EVENT event,
struct sk_buff *skb)
{
LM_REASON reason;
int ret = 0;
IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
IRDA_ASSERT(self != NULL, return -1;);
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
IRDA_ASSERT(self->lap != NULL, return -1;);
switch (event) {
case LM_DATA_REQUEST: /* Optimize for the common case */
irlmp_send_data_pdu(self->lap, self->dlsap_sel,
self->slsap_sel, FALSE, skb);
break;
case LM_DATA_INDICATION: /* Optimize for the common case */
irlmp_data_indication(self, skb);
break;
case LM_UDATA_REQUEST:
IRDA_ASSERT(skb != NULL, return -1;);
irlmp_send_data_pdu(self->lap, self->dlsap_sel,
self->slsap_sel, TRUE, skb);
break;
case LM_UDATA_INDICATION:
irlmp_udata_indication(self, skb);
break;
case LM_CONNECT_REQUEST:
IRDA_DEBUG(0, "%s(), LM_CONNECT_REQUEST, "
"error, LSAP already connected\n", __FUNCTION__);
/* Keep state */
break;
case LM_CONNECT_RESPONSE:
IRDA_DEBUG(0, "%s(), LM_CONNECT_RESPONSE, "
"error, LSAP already connected\n", __FUNCTION__);
/* Keep state */
break;
case LM_DISCONNECT_REQUEST:
irlmp_send_lcf_pdu(self->lap, self->dlsap_sel, self->slsap_sel,
DISCONNECT, skb);
irlmp_next_lsap_state(self, LSAP_DISCONNECTED);
/* Called only from irlmp_disconnect_request(), will
* unbind from LAP over there. Jean II */
/* Try to close the LAP connection if its still there */
if (self->lap) {
IRDA_DEBUG(4, "%s(), trying to close IrLAP\n",
__FUNCTION__);
irlmp_do_lap_event(self->lap,
LM_LAP_DISCONNECT_REQUEST,
NULL);
}
break;
case LM_LAP_DISCONNECT_INDICATION:
irlmp_next_lsap_state(self, LSAP_DISCONNECTED);
reason = irlmp_convert_lap_reason(self->lap->reason);
irlmp_disconnect_indication(self, reason, NULL);
break;
case LM_DISCONNECT_INDICATION:
irlmp_next_lsap_state(self, LSAP_DISCONNECTED);
IRDA_ASSERT(self->lap != NULL, return -1;);
IRDA_ASSERT(self->lap->magic == LMP_LAP_MAGIC, return -1;);
IRDA_ASSERT(skb != NULL, return -1;);
IRDA_ASSERT(skb->len > 3, return -1;);
reason = skb->data[3];
/* Try to close the LAP connection */
IRDA_DEBUG(4, "%s(), trying to close IrLAP\n", __FUNCTION__);
irlmp_do_lap_event(self->lap, LM_LAP_DISCONNECT_REQUEST, NULL);
irlmp_disconnect_indication(self, reason, skb);
break;
default:
IRDA_DEBUG(0, "%s(), Unknown event %s on LSAP %#02x\n",
__FUNCTION__, irlmp_event[event], self->slsap_sel);
break;
}
return ret;
}
/*
* Function irlmp_state_setup (event, skb, info)
*
* SETUP, Station Control has set up the underlying IrLAP connection.
* An LSAP connection request has been transmitted to the peer
* LSAP-Connection Control FSM and we are awaiting reply.
*/
static int irlmp_state_setup(struct lsap_cb *self, IRLMP_EVENT event,
struct sk_buff *skb)
{
LM_REASON reason;
int ret = 0;
IRDA_ASSERT(self != NULL, return -1;);
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
switch (event) {
case LM_CONNECT_CONFIRM:
irlmp_next_lsap_state(self, LSAP_DATA_TRANSFER_READY);
del_timer(&self->watchdog_timer);
irlmp_connect_confirm(self, skb);
break;
case LM_DISCONNECT_INDICATION:
irlmp_next_lsap_state(self, LSAP_DISCONNECTED);
IRDA_ASSERT(self->lap != NULL, return -1;);
IRDA_ASSERT(self->lap->magic == LMP_LAP_MAGIC, return -1;);
IRDA_ASSERT(skb != NULL, return -1;);
IRDA_ASSERT(skb->len > 3, return -1;);
reason = skb->data[3];
/* Try to close the LAP connection */
IRDA_DEBUG(4, "%s(), trying to close IrLAP\n", __FUNCTION__);
irlmp_do_lap_event(self->lap, LM_LAP_DISCONNECT_REQUEST, NULL);
irlmp_disconnect_indication(self, reason, skb);
break;
case LM_LAP_DISCONNECT_INDICATION:
irlmp_next_lsap_state(self, LSAP_DISCONNECTED);
del_timer(&self->watchdog_timer);
IRDA_ASSERT(self->lap != NULL, return -1;);
IRDA_ASSERT(self->lap->magic == LMP_LAP_MAGIC, return -1;);
reason = irlmp_convert_lap_reason(self->lap->reason);
irlmp_disconnect_indication(self, reason, skb);
break;
case LM_WATCHDOG_TIMEOUT:
IRDA_DEBUG(0, "%s() WATCHDOG_TIMEOUT!\n", __FUNCTION__);
IRDA_ASSERT(self->lap != NULL, return -1;);
irlmp_do_lap_event(self->lap, LM_LAP_DISCONNECT_REQUEST, NULL);
irlmp_next_lsap_state(self, LSAP_DISCONNECTED);
irlmp_disconnect_indication(self, LM_CONNECT_FAILURE, NULL);
break;
default:
IRDA_DEBUG(0, "%s(), Unknown event %s on LSAP %#02x\n",
__FUNCTION__, irlmp_event[event], self->slsap_sel);
break;
}
return ret;
}
/*
* Function irlmp_state_setup_pend (event, skb, info)
*
* SETUP_PEND, An LM_CONNECT_REQUEST has been received from the service
* user to set up an LSAP connection. A request has been sent to the
* LAP FSM to set up the underlying IrLAP connection, and we
* are awaiting confirm.
*/
static int irlmp_state_setup_pend(struct lsap_cb *self, IRLMP_EVENT event,
struct sk_buff *skb)
{
struct sk_buff *tx_skb;
LM_REASON reason;
int ret = 0;
IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
IRDA_ASSERT(self != NULL, return -1;);
IRDA_ASSERT(irlmp != NULL, return -1;);
switch (event) {
case LM_LAP_CONNECT_CONFIRM:
IRDA_ASSERT(self->conn_skb != NULL, return -1;);
tx_skb = self->conn_skb;
self->conn_skb = NULL;
irlmp_send_lcf_pdu(self->lap, self->dlsap_sel,
self->slsap_sel, CONNECT_CMD, tx_skb);
/* Drop reference count - see irlap_data_request(). */
dev_kfree_skb(tx_skb);
irlmp_next_lsap_state(self, LSAP_SETUP);
break;
case LM_WATCHDOG_TIMEOUT:
IRDA_DEBUG(0, "%s() : WATCHDOG_TIMEOUT !\n", __FUNCTION__);
IRDA_ASSERT(self->lap != NULL, return -1;);
irlmp_do_lap_event(self->lap, LM_LAP_DISCONNECT_REQUEST, NULL);
irlmp_next_lsap_state(self, LSAP_DISCONNECTED);
irlmp_disconnect_indication(self, LM_CONNECT_FAILURE, NULL);
break;
case LM_LAP_DISCONNECT_INDICATION: /* LS_Disconnect.indication */
del_timer( &self->watchdog_timer);
irlmp_next_lsap_state(self, LSAP_DISCONNECTED);
reason = irlmp_convert_lap_reason(self->lap->reason);
irlmp_disconnect_indication(self, reason, NULL);
break;
default:
IRDA_DEBUG(0, "%s(), Unknown event %s on LSAP %#02x\n",
__FUNCTION__, irlmp_event[event], self->slsap_sel);
break;
}
return ret;
}
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