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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/irda/irlmp_event.c
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'net/irda/irlmp_event.c')
-rw-r--r--net/irda/irlmp_event.c912
1 files changed, 912 insertions, 0 deletions
diff --git a/net/irda/irlmp_event.c b/net/irda/irlmp_event.c
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+++ b/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 Tromsų admit liability nor
+ * provide warranty for any of this software. This material is
+ * provided "AS-IS" and at no charge.
+ *
+ ********************************************************************/
+
+#include <linux/config.h>
+#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();
+
+ /* Active discovery is conditional */
+ if (sysctl_discovery)
+ 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;
+}