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![Lucas De Marchi](/assets/img/avatar_default.png)
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
909 lines
26 KiB
C
909 lines
26 KiB
C
/*********************************************************************
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*
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* Filename: irlmp_event.c
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* Version: 0.8
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* Description: An IrDA LMP event driver for Linux
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* Status: Experimental.
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* Author: Dag Brattli <dagb@cs.uit.no>
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* Created at: Mon Aug 4 20:40:53 1997
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* Modified at: Tue Dec 14 23:04:16 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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* Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
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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/kernel.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/irlap.h>
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#include <net/irda/irlmp.h>
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#include <net/irda/irlmp_frame.h>
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#include <net/irda/irlmp_event.h>
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const char *const irlmp_state[] = {
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"LAP_STANDBY",
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"LAP_U_CONNECT",
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"LAP_ACTIVE",
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};
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const char *const irlsap_state[] = {
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"LSAP_DISCONNECTED",
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"LSAP_CONNECT",
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"LSAP_CONNECT_PEND",
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"LSAP_DATA_TRANSFER_READY",
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"LSAP_SETUP",
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"LSAP_SETUP_PEND",
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};
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#ifdef CONFIG_IRDA_DEBUG
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static const char *const irlmp_event[] = {
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"LM_CONNECT_REQUEST",
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"LM_CONNECT_CONFIRM",
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"LM_CONNECT_RESPONSE",
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"LM_CONNECT_INDICATION",
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"LM_DISCONNECT_INDICATION",
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"LM_DISCONNECT_REQUEST",
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"LM_DATA_REQUEST",
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"LM_UDATA_REQUEST",
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"LM_DATA_INDICATION",
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"LM_UDATA_INDICATION",
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"LM_WATCHDOG_TIMEOUT",
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/* IrLAP events */
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"LM_LAP_CONNECT_REQUEST",
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"LM_LAP_CONNECT_INDICATION",
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"LM_LAP_CONNECT_CONFIRM",
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"LM_LAP_DISCONNECT_INDICATION",
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"LM_LAP_DISCONNECT_REQUEST",
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"LM_LAP_DISCOVERY_REQUEST",
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"LM_LAP_DISCOVERY_CONFIRM",
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"LM_LAP_IDLE_TIMEOUT",
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};
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#endif /* CONFIG_IRDA_DEBUG */
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/* LAP Connection control proto declarations */
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static void irlmp_state_standby (struct lap_cb *, IRLMP_EVENT,
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struct sk_buff *);
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static void irlmp_state_u_connect(struct lap_cb *, IRLMP_EVENT,
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struct sk_buff *);
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static void irlmp_state_active (struct lap_cb *, IRLMP_EVENT,
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struct sk_buff *);
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/* LSAP Connection control proto declarations */
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static int irlmp_state_disconnected(struct lsap_cb *, IRLMP_EVENT,
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struct sk_buff *);
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static int irlmp_state_connect (struct lsap_cb *, IRLMP_EVENT,
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struct sk_buff *);
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static int irlmp_state_connect_pend(struct lsap_cb *, IRLMP_EVENT,
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struct sk_buff *);
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static int irlmp_state_dtr (struct lsap_cb *, IRLMP_EVENT,
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struct sk_buff *);
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static int irlmp_state_setup (struct lsap_cb *, IRLMP_EVENT,
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struct sk_buff *);
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static int irlmp_state_setup_pend (struct lsap_cb *, IRLMP_EVENT,
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struct sk_buff *);
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static void (*lap_state[]) (struct lap_cb *, IRLMP_EVENT, struct sk_buff *) =
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{
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irlmp_state_standby,
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irlmp_state_u_connect,
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irlmp_state_active,
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};
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static int (*lsap_state[])( struct lsap_cb *, IRLMP_EVENT, struct sk_buff *) =
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{
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irlmp_state_disconnected,
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irlmp_state_connect,
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irlmp_state_connect_pend,
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irlmp_state_dtr,
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irlmp_state_setup,
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irlmp_state_setup_pend
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};
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static inline void irlmp_next_lap_state(struct lap_cb *self,
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IRLMP_STATE state)
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{
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/*
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IRDA_DEBUG(4, "%s(), LMP LAP = %s\n", __func__, irlmp_state[state]);
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*/
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self->lap_state = state;
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}
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static inline void irlmp_next_lsap_state(struct lsap_cb *self,
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LSAP_STATE state)
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{
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/*
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IRDA_ASSERT(self != NULL, return;);
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IRDA_DEBUG(4, "%s(), LMP LSAP = %s\n", __func__, irlsap_state[state]);
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*/
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self->lsap_state = state;
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}
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/* Do connection control events */
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int irlmp_do_lsap_event(struct lsap_cb *self, IRLMP_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_ASSERT(self != NULL, return -1;);
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IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
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IRDA_DEBUG(4, "%s(), EVENT = %s, STATE = %s\n",
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__func__, irlmp_event[event], irlsap_state[ self->lsap_state]);
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return (*lsap_state[self->lsap_state]) (self, event, skb);
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}
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/*
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* Function do_lap_event (event, skb, info)
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*
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* Do IrLAP control events
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*
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*/
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void irlmp_do_lap_event(struct lap_cb *self, IRLMP_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 == LMP_LAP_MAGIC, return;);
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IRDA_DEBUG(4, "%s(), EVENT = %s, STATE = %s\n", __func__,
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irlmp_event[event],
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irlmp_state[self->lap_state]);
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(*lap_state[self->lap_state]) (self, event, skb);
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}
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void irlmp_discovery_timer_expired(void *data)
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{
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IRDA_DEBUG(4, "%s()\n", __func__);
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/* We always cleanup the log (active & passive discovery) */
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irlmp_do_expiry();
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irlmp_do_discovery(sysctl_discovery_slots);
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/* Restart timer */
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irlmp_start_discovery_timer(irlmp, sysctl_discovery_timeout * HZ);
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}
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void irlmp_watchdog_timer_expired(void *data)
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{
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struct lsap_cb *self = (struct lsap_cb *) data;
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IRDA_DEBUG(2, "%s()\n", __func__);
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IRDA_ASSERT(self != NULL, return;);
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IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
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irlmp_do_lsap_event(self, LM_WATCHDOG_TIMEOUT, NULL);
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}
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void irlmp_idle_timer_expired(void *data)
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{
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struct lap_cb *self = (struct lap_cb *) data;
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IRDA_DEBUG(2, "%s()\n", __func__);
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IRDA_ASSERT(self != NULL, return;);
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IRDA_ASSERT(self->magic == LMP_LAP_MAGIC, return;);
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irlmp_do_lap_event(self, LM_LAP_IDLE_TIMEOUT, NULL);
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}
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/*
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* Send an event on all LSAPs attached to this LAP.
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*/
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static inline void
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irlmp_do_all_lsap_event(hashbin_t * lsap_hashbin,
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IRLMP_EVENT event)
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{
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struct lsap_cb *lsap;
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struct lsap_cb *lsap_next;
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/* Note : this function use the new hashbin_find_next()
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* function, instead of the old hashbin_get_next().
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* This make sure that we are always pointing one lsap
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* ahead, so that if the current lsap is removed as the
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* result of sending the event, we don't care.
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* Also, as we store the context ourselves, if an enumeration
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* of the same lsap hashbin happens as the result of sending the
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* event, we don't care.
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* The only problem is if the next lsap is removed. In that case,
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* hashbin_find_next() will return NULL and we will abort the
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* enumeration. - Jean II */
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/* Also : we don't accept any skb in input. We can *NOT* pass
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* the same skb to multiple clients safely, we would need to
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* skb_clone() it. - Jean II */
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lsap = (struct lsap_cb *) hashbin_get_first(lsap_hashbin);
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while (NULL != hashbin_find_next(lsap_hashbin,
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(long) lsap,
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NULL,
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(void *) &lsap_next) ) {
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irlmp_do_lsap_event(lsap, event, NULL);
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lsap = lsap_next;
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}
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}
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/*********************************************************************
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*
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* LAP connection control states
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*
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********************************************************************/
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/*
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* Function irlmp_state_standby (event, skb, info)
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*
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* STANDBY, The IrLAP connection does not exist.
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*
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*/
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static void irlmp_state_standby(struct lap_cb *self, IRLMP_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_DEBUG(4, "%s()\n", __func__);
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IRDA_ASSERT(self->irlap != NULL, return;);
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switch (event) {
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case LM_LAP_DISCOVERY_REQUEST:
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/* irlmp_next_station_state( LMP_DISCOVER); */
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irlap_discovery_request(self->irlap, &irlmp->discovery_cmd);
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break;
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case LM_LAP_CONNECT_INDICATION:
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/* It's important to switch state first, to avoid IrLMP to
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* think that the link is free since IrLMP may then start
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* discovery before the connection is properly set up. DB.
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*/
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irlmp_next_lap_state(self, LAP_ACTIVE);
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/* Just accept connection TODO, this should be fixed */
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irlap_connect_response(self->irlap, skb);
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break;
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case LM_LAP_CONNECT_REQUEST:
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IRDA_DEBUG(4, "%s() LS_CONNECT_REQUEST\n", __func__);
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irlmp_next_lap_state(self, LAP_U_CONNECT);
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/* FIXME: need to set users requested QoS */
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irlap_connect_request(self->irlap, self->daddr, NULL, 0);
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break;
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case LM_LAP_DISCONNECT_INDICATION:
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IRDA_DEBUG(4, "%s(), Error LM_LAP_DISCONNECT_INDICATION\n",
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__func__);
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irlmp_next_lap_state(self, LAP_STANDBY);
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break;
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default:
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IRDA_DEBUG(0, "%s(), Unknown event %s\n",
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__func__, irlmp_event[event]);
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break;
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}
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}
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/*
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* Function irlmp_state_u_connect (event, skb, info)
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*
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* U_CONNECT, The layer above has tried to open an LSAP connection but
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* since the IrLAP connection does not exist, we must first start an
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* IrLAP connection. We are now waiting response from IrLAP.
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* */
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static void irlmp_state_u_connect(struct lap_cb *self, IRLMP_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_DEBUG(2, "%s(), event=%s\n", __func__, irlmp_event[event]);
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switch (event) {
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case LM_LAP_CONNECT_INDICATION:
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/* It's important to switch state first, to avoid IrLMP to
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* think that the link is free since IrLMP may then start
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* discovery before the connection is properly set up. DB.
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*/
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irlmp_next_lap_state(self, LAP_ACTIVE);
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/* Just accept connection TODO, this should be fixed */
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irlap_connect_response(self->irlap, skb);
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/* Tell LSAPs that they can start sending data */
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irlmp_do_all_lsap_event(self->lsaps, LM_LAP_CONNECT_CONFIRM);
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/* Note : by the time we get there (LAP retries and co),
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* the lsaps may already have gone. This avoid getting stuck
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* forever in LAP_ACTIVE state - Jean II */
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if (HASHBIN_GET_SIZE(self->lsaps) == 0) {
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IRDA_DEBUG(0, "%s() NO LSAPs !\n", __func__);
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irlmp_start_idle_timer(self, LM_IDLE_TIMEOUT);
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}
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break;
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case LM_LAP_CONNECT_REQUEST:
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/* Already trying to connect */
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break;
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case LM_LAP_CONNECT_CONFIRM:
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/* For all lsap_ce E Associated do LS_Connect_confirm */
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irlmp_next_lap_state(self, LAP_ACTIVE);
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/* Tell LSAPs that they can start sending data */
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irlmp_do_all_lsap_event(self->lsaps, LM_LAP_CONNECT_CONFIRM);
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/* Note : by the time we get there (LAP retries and co),
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* the lsaps may already have gone. This avoid getting stuck
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* forever in LAP_ACTIVE state - Jean II */
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if (HASHBIN_GET_SIZE(self->lsaps) == 0) {
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IRDA_DEBUG(0, "%s() NO LSAPs !\n", __func__);
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irlmp_start_idle_timer(self, LM_IDLE_TIMEOUT);
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}
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break;
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case LM_LAP_DISCONNECT_INDICATION:
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IRDA_DEBUG(4, "%s(), LM_LAP_DISCONNECT_INDICATION\n", __func__);
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irlmp_next_lap_state(self, LAP_STANDBY);
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/* Send disconnect event to all LSAPs using this link */
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irlmp_do_all_lsap_event(self->lsaps,
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LM_LAP_DISCONNECT_INDICATION);
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break;
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case LM_LAP_DISCONNECT_REQUEST:
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IRDA_DEBUG(4, "%s(), LM_LAP_DISCONNECT_REQUEST\n", __func__);
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/* One of the LSAP did timeout or was closed, if it was
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* the last one, try to get out of here - Jean II */
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if (HASHBIN_GET_SIZE(self->lsaps) <= 1) {
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irlap_disconnect_request(self->irlap);
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}
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break;
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default:
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IRDA_DEBUG(0, "%s(), Unknown event %s\n",
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__func__, irlmp_event[event]);
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break;
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}
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}
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/*
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* Function irlmp_state_active (event, skb, info)
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*
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* ACTIVE, IrLAP connection is active
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*
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*/
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static void irlmp_state_active(struct lap_cb *self, IRLMP_EVENT event,
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struct sk_buff *skb)
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{
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IRDA_DEBUG(4, "%s()\n", __func__);
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switch (event) {
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case LM_LAP_CONNECT_REQUEST:
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IRDA_DEBUG(4, "%s(), LS_CONNECT_REQUEST\n", __func__);
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/*
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* IrLAP may have a pending disconnect. We tried to close
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* IrLAP, but it was postponed because the link was
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* busy or we were still sending packets. As we now
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* need it, make sure it stays on. Jean II
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*/
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irlap_clear_disconnect(self->irlap);
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/*
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* LAP connection already active, just bounce back! Since we
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* don't know which LSAP that tried to do this, we have to
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* notify all LSAPs using this LAP, but that should be safe to
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* do anyway.
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*/
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irlmp_do_all_lsap_event(self->lsaps, LM_LAP_CONNECT_CONFIRM);
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/* Needed by connect indication */
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irlmp_do_all_lsap_event(irlmp->unconnected_lsaps,
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LM_LAP_CONNECT_CONFIRM);
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/* Keep state */
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break;
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case LM_LAP_DISCONNECT_REQUEST:
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/*
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* Need to find out if we should close IrLAP or not. If there
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* is only one LSAP connection left on this link, that LSAP
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* must be the one that tries to close IrLAP. It will be
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* removed later and moved to the list of unconnected LSAPs
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*/
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if (HASHBIN_GET_SIZE(self->lsaps) > 0) {
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/* Timer value is checked in irsysctl - Jean II */
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irlmp_start_idle_timer(self, sysctl_lap_keepalive_time * HZ / 1000);
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} else {
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/* No more connections, so close IrLAP */
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/* We don't want to change state just yet, because
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* we want to reflect accurately the real state of
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* the LAP, not the state we wish it was in,
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* so that we don't lose LM_LAP_CONNECT_REQUEST.
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* In some cases, IrLAP won't close the LAP
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* immediately. For example, it might still be
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* retrying packets or waiting for the pf bit.
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* As the LAP always send a DISCONNECT_INDICATION
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* in PCLOSE or SCLOSE, just change state on that.
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* Jean II */
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irlap_disconnect_request(self->irlap);
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}
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break;
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case LM_LAP_IDLE_TIMEOUT:
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if (HASHBIN_GET_SIZE(self->lsaps) == 0) {
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/* Same reasoning as above - keep state */
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irlap_disconnect_request(self->irlap);
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}
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break;
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case LM_LAP_DISCONNECT_INDICATION:
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irlmp_next_lap_state(self, LAP_STANDBY);
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/* In some case, at this point our side has already closed
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* all lsaps, and we are waiting for the idle_timer to
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* expire. If another device reconnect immediately, the
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* idle timer will expire in the midle of the connection
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* initialisation, screwing up things a lot...
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* Therefore, we must stop the timer... */
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irlmp_stop_idle_timer(self);
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/*
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* Inform all connected LSAP's using this link
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*/
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irlmp_do_all_lsap_event(self->lsaps,
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LM_LAP_DISCONNECT_INDICATION);
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/* Force an expiry of the discovery log.
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* Now that the LAP is free, the system may attempt to
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* connect to another device. Unfortunately, our entries
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* are stale. There is a small window (<3s) before the
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* normal discovery will run and where irlmp_connect_request()
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* can get the wrong info, so make sure things get
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* cleaned *NOW* ;-) - Jean II */
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irlmp_do_expiry();
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break;
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default:
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IRDA_DEBUG(0, "%s(), Unknown event %s\n",
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__func__, irlmp_event[event]);
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break;
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|
}
|
|
}
|
|
|
|
/*********************************************************************
|
|
*
|
|
* 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", __func__);
|
|
|
|
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 bizarre. 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", __func__);
|
|
|
|
if (self->conn_skb) {
|
|
IRDA_WARNING("%s: busy with another request!\n",
|
|
__func__);
|
|
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",
|
|
__func__);
|
|
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",
|
|
__func__, 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", __func__);
|
|
|
|
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", __func__);
|
|
|
|
/* 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",
|
|
__func__, 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", __func__);
|
|
|
|
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", __func__);
|
|
/* Keep state */
|
|
break;
|
|
case LM_DISCONNECT_REQUEST:
|
|
IRDA_DEBUG(0, "%s(), LM_DISCONNECT_REQUEST, "
|
|
"not yet bound to IrLAP connection\n", __func__);
|
|
/* Keep state */
|
|
break;
|
|
case LM_LAP_CONNECT_CONFIRM:
|
|
IRDA_DEBUG(4, "%s(), LS_CONNECT_CONFIRM\n", __func__);
|
|
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", __func__);
|
|
|
|
/* 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",
|
|
__func__, 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", __func__);
|
|
|
|
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", __func__);
|
|
/* Keep state */
|
|
break;
|
|
case LM_CONNECT_RESPONSE:
|
|
IRDA_DEBUG(0, "%s(), LM_CONNECT_RESPONSE, "
|
|
"error, LSAP already connected\n", __func__);
|
|
/* 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",
|
|
__func__);
|
|
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", __func__);
|
|
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",
|
|
__func__, 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", __func__);
|
|
|
|
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", __func__);
|
|
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", __func__);
|
|
|
|
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",
|
|
__func__, 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", __func__);
|
|
|
|
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", __func__);
|
|
|
|
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",
|
|
__func__, irlmp_event[event], self->slsap_sel);
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|