patch-2.2.3 linux/net/irda/irlan/irlan_client_event.c

• Lines: 533
• Date: Sun Mar 7 15:26:44 1999
• Orig file: v2.2.2/linux/net/irda/irlan/irlan_client_event.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.2.2/linux/net/irda/irlan/irlan_client_event.c linux/net/irda/irlan/irlan_client_event.c
@@ -0,0 +1,532 @@
+/*********************************************************************
+ *                
+ * Filename:      irlan_client_event.c
+ * Version:       0.9
+ * Description:   IrLAN client state machine
+ * Status:        Experimental.
+ * Author:        Dag Brattli <dagb@cs.uit.no>
+ * Created at:    Sun Aug 31 20:14:37 1997
+ * Modified at:   Thu Feb  4 16:08:07 1999
+ * Modified by:   Dag Brattli <dagb@cs.uit.no>
+ * 
+ *     Copyright (c) 1998 Dag Brattli <dagb@cs.uit.no>, 
+ *     All Rights Reserved.
+ *     
+ *     This program is free software; you can redistribute it and/or 
+ *     modify it under the terms of the GNU General Public License as 
+ *     published by the Free Software Foundation; either version 2 of 
+ *     the License, or (at your option) any later version.
+ *
+ *     Neither Dag Brattli nor University of Tromsų admit liability nor
+ *     provide warranty for any of this software. This material is 
+ *     provided "AS-IS" and at no charge.
+ *
+ ********************************************************************/
+
+#include <linux/skbuff.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/timer.h>
+#include <net/irda/irmod.h>
+#include <net/irda/iriap.h>
+#include <net/irda/irlmp.h>
+#include <net/irda/irttp.h>
+
+#include <net/irda/irlan_common.h>
+#include <net/irda/irlan_client.h>
+#include <net/irda/irlan_event.h>
+
+static int irlan_client_state_idle (struct irlan_cb *self, IRLAN_EVENT event, 
+				    struct sk_buff *skb);
+static int irlan_client_state_query(struct irlan_cb *self, IRLAN_EVENT event, 
+				    struct sk_buff *skb);
+static int irlan_client_state_conn (struct irlan_cb *self, IRLAN_EVENT event, 
+				    struct sk_buff *skb);
+static int irlan_client_state_info (struct irlan_cb *self, IRLAN_EVENT event, 
+				    struct sk_buff *skb);
+static int irlan_client_state_media(struct irlan_cb *self, IRLAN_EVENT event, 
+				    struct sk_buff *skb);
+static int irlan_client_state_open (struct irlan_cb *self, IRLAN_EVENT event, 
+				    struct sk_buff *skb);
+static int irlan_client_state_wait (struct irlan_cb *self, IRLAN_EVENT event, 
+				    struct sk_buff *skb);
+static int irlan_client_state_arb  (struct irlan_cb *self, IRLAN_EVENT event, 
+				    struct sk_buff *skb);
+static int irlan_client_state_data (struct irlan_cb *self, IRLAN_EVENT event, 
+				    struct sk_buff *skb);
+static int irlan_client_state_close(struct irlan_cb *self, IRLAN_EVENT event, 
+				    struct sk_buff *skb);
+static int irlan_client_state_sync (struct irlan_cb *self, IRLAN_EVENT event, 
+				    struct sk_buff *skb);
+
+static int (*state[])(struct irlan_cb *, IRLAN_EVENT event, struct sk_buff *) =
+{ 
+	irlan_client_state_idle,
+	irlan_client_state_query,
+	irlan_client_state_conn,
+	irlan_client_state_info,
+	irlan_client_state_media,
+	irlan_client_state_open,
+	irlan_client_state_wait,
+	irlan_client_state_arb,
+	irlan_client_state_data,
+	irlan_client_state_close,
+	irlan_client_state_sync
+};
+
+void irlan_do_client_event(struct irlan_cb *self, IRLAN_EVENT event, 
+			   struct sk_buff *skb) 
+{
+	ASSERT(self != NULL, return;);
+	ASSERT(self->magic == IRLAN_MAGIC, return;);
+
+	(*state[ self->client.state]) (self, event, skb);
+}
+
+/*
+ * Function irlan_client_state_idle (event, skb, info)
+ *
+ *    IDLE, We are waiting for an indication that there is a provider
+ *    available.
+ */
+static int irlan_client_state_idle(struct irlan_cb *self, IRLAN_EVENT event, 
+				   struct sk_buff *skb) 
+{
+	DEBUG(4, __FUNCTION__ "()\n");
+
+	ASSERT(self != NULL, return -1;);
+	ASSERT(self->magic == IRLAN_MAGIC, return -1;);
+	
+	switch(event) {
+	case IRLAN_DISCOVERY_INDICATION:
+		/* Get some values from peer IAS */
+		iriap_getvaluebyclass_request(
+			"IrLAN", "IrDA:TinyTP:LsapSel",
+			self->saddr, self->daddr,
+			irlan_client_get_value_confirm, self);
+		
+		irlan_next_client_state(self, IRLAN_QUERY);
+		break;
+	case IRLAN_WATCHDOG_TIMEOUT:
+		DEBUG(2, __FUNCTION__ "(), IRLAN_WATCHDOG_TIMEOUT\n");
+		break;
+	default:
+		DEBUG(4, __FUNCTION__ "(), Unknown event %d\n", event);
+		break;
+	}
+	if (skb) 
+		dev_kfree_skb(skb);
+
+	return 0;
+}
+
+/*
+ * Function irlan_client_state_query (event, skb, info)
+ *
+ *    QUERY, We have queryed the remote IAS and is ready to connect
+ *    to provider, just waiting for the confirm.
+ *
+ */
+static int irlan_client_state_query(struct irlan_cb *self, IRLAN_EVENT event, 
+				    struct sk_buff *skb) 
+{
+	DEBUG(4, __FUNCTION__ "()\n");
+
+	ASSERT(self != NULL, return -1;);
+	ASSERT(self->magic == IRLAN_MAGIC, return -1;);
+	
+	switch(event) {
+	case IRLAN_IAS_PROVIDER_AVAIL:
+		ASSERT(self->dtsap_sel_ctrl != 0, return -1;);
+
+		self->client.open_retries = 0;
+		
+		irttp_connect_request(self->client.tsap_ctrl, 
+				      self->dtsap_sel_ctrl, 
+				      self->saddr, self->daddr, NULL, 
+				      IRLAN_MTU, NULL);
+		irlan_next_client_state(self, IRLAN_CONN);
+		break;
+	case IRLAN_IAS_PROVIDER_NOT_AVAIL:
+		DEBUG(2, __FUNCTION__ "(), IAS_PROVIDER_NOT_AVAIL\n");
+		irlan_next_client_state(self, IRLAN_IDLE);
+
+		/* Give the client a kick! */
+		if ((self->access_type == ACCESS_PEER) && 
+		    (self->provider.state != IRLAN_IDLE))
+			irlan_client_wakeup(self, self->saddr, self->daddr);
+		break;
+	case IRLAN_LMP_DISCONNECT:
+	case IRLAN_LAP_DISCONNECT:
+		irlan_next_client_state(self, IRLAN_IDLE);
+		break;
+	case IRLAN_WATCHDOG_TIMEOUT:
+		DEBUG(2, __FUNCTION__ "(), IRLAN_WATCHDOG_TIMEOUT\n");
+		break;
+	default:
+		DEBUG(2, __FUNCTION__"(), Unknown event %d\n", event);
+		break;
+	}
+	if (skb)
+		dev_kfree_skb(skb);
+	
+	return 0;
+}
+
+/*
+ * Function irlan_client_state_conn (event, skb, info)
+ *
+ *    CONN, We have connected to a provider but has not issued any
+ *    commands yet.
+ *
+ */
+static int irlan_client_state_conn(struct irlan_cb *self, IRLAN_EVENT event, 
+				   struct sk_buff *skb) 
+{
+	DEBUG(4, __FUNCTION__ "()\n");
+	
+	ASSERT(self != NULL, return -1;);
+	
+	switch(event) {
+	case IRLAN_CONNECT_COMPLETE:
+		/* Send getinfo cmd */
+		irlan_get_provider_info(self);
+		irlan_next_client_state(self, IRLAN_INFO);
+		break;
+	case IRLAN_LMP_DISCONNECT:
+	case IRLAN_LAP_DISCONNECT:
+		irlan_next_client_state(self, IRLAN_IDLE);
+		break;
+	case IRLAN_WATCHDOG_TIMEOUT:
+		DEBUG(2, __FUNCTION__ "(), IRLAN_WATCHDOG_TIMEOUT\n");
+		break;
+	default:
+		DEBUG(2, __FUNCTION__ "(), Unknown event %d\n", event);
+		break;
+	}
+	if (skb)
+		dev_kfree_skb(skb);
+	
+	return 0;
+}
+
+/*
+ * Function irlan_client_state_info (self, event, skb, info)
+ *
+ *    INFO, We have issued a GetInfo command and is awaiting a reply.
+ */
+static int irlan_client_state_info(struct irlan_cb *self, IRLAN_EVENT event, 
+				   struct sk_buff *skb) 
+{
+	DEBUG(4, __FUNCTION__ "()\n");
+
+	ASSERT(self != NULL, return -1;);
+	
+	switch(event) {
+	case IRLAN_DATA_INDICATION:
+		ASSERT(skb != NULL, return -1;);
+	
+		irlan_client_extract_params(self, skb);
+		
+		irlan_next_client_state(self, IRLAN_MEDIA);
+		
+		irlan_get_media_char(self);
+		break;
+		
+	case IRLAN_LMP_DISCONNECT:
+	case IRLAN_LAP_DISCONNECT:
+		irlan_next_client_state(self, IRLAN_IDLE);
+		break;
+	case IRLAN_WATCHDOG_TIMEOUT:
+		DEBUG(2, __FUNCTION__ "(), IRLAN_WATCHDOG_TIMEOUT\n");
+		break;
+	default:
+		DEBUG(2, __FUNCTION__ "(), Unknown event %d\n", event);
+		break;
+	}
+	if (skb)
+		dev_kfree_skb(skb);
+	
+	return 0;
+}
+
+/*
+ * Function irlan_client_state_media (self, event, skb, info)
+ *
+ *    MEDIA, The irlan_client has issued a GetMedia command and is awaiting a
+ *    reply.
+ *
+ */
+static int irlan_client_state_media(struct irlan_cb *self, IRLAN_EVENT event, 
+				    struct sk_buff *skb) 
+{
+	DEBUG(4, __FUNCTION__ "()\n");
+	
+	ASSERT(self != NULL, return -1;);
+
+	switch(event) {
+	case IRLAN_DATA_INDICATION:
+		irlan_client_extract_params(self, skb);
+		irlan_open_data_channel(self);
+		irlan_next_client_state(self, IRLAN_OPEN);
+		break;
+	case IRLAN_LMP_DISCONNECT:
+	case IRLAN_LAP_DISCONNECT:
+		irlan_next_client_state(self, IRLAN_IDLE);
+		break;
+	case IRLAN_WATCHDOG_TIMEOUT:
+		DEBUG(2, __FUNCTION__ "(), IRLAN_WATCHDOG_TIMEOUT\n");
+		break;
+	default:
+		DEBUG(2, __FUNCTION__ "(), Unknown event %d\n", event);
+		break;
+	}
+	if (skb)
+		dev_kfree_skb(skb);
+	
+	return 0;
+}
+
+/*
+ * Function irlan_client_state_open (self, event, skb, info)
+ *
+ *    OPEN, The irlan_client has issued a OpenData command and is awaiting a
+ *    reply
+ *
+ */
+static int irlan_client_state_open(struct irlan_cb *self, IRLAN_EVENT event, 
+				   struct sk_buff *skb) 
+{
+	struct qos_info qos;
+
+	DEBUG(4, __FUNCTION__ "()\n");
+	
+	ASSERT(self != NULL, return -1;);
+
+	switch(event) {
+	case IRLAN_DATA_INDICATION:
+		irlan_client_extract_params(self, skb);
+		
+		/*
+		 *  Check if we have got the remote TSAP for data 
+		 *  communications
+		 */
+	  	ASSERT(self->dtsap_sel_data != 0, return -1;);
+
+		/* Check which access type we are dealing with */
+		switch(self->access_type) {
+		case ACCESS_PEER:
+		    if (self->provider.state == IRLAN_OPEN) {
+			    
+			    irlan_next_client_state(self, IRLAN_ARB);
+			    irlan_do_client_event(self, IRLAN_CHECK_CON_ARB, 
+						  NULL);
+		    } else {
+			
+			    irlan_next_client_state(self, IRLAN_WAIT);
+		    }
+		    break;
+		case ACCESS_DIRECT:
+		case ACCESS_HOSTED:
+			qos.link_disc_time.bits = 0x01; /* 3 secs */
+			
+			irttp_connect_request(self->tsap_data, 
+					      self->dtsap_sel_data, 
+					      self->saddr, self->daddr, &qos, 
+					      IRLAN_MTU, NULL);
+			
+			irlan_next_client_state(self, IRLAN_DATA);
+
+			if (self->client.start_new_provider) {
+				irlan_open(DEV_ADDR_ANY, DEV_ADDR_ANY, FALSE);
+				self->client.start_new_provider = FALSE;
+			}
+			break;
+		default:
+			DEBUG(2, __FUNCTION__ "(), unknown access type!\n");
+			break;
+		}
+		break;
+	case IRLAN_LMP_DISCONNECT:
+	case IRLAN_LAP_DISCONNECT:
+		irlan_next_client_state(self, IRLAN_IDLE);
+		break;
+	case IRLAN_WATCHDOG_TIMEOUT:
+		DEBUG(2, __FUNCTION__ "(), IRLAN_WATCHDOG_TIMEOUT\n");
+		break;
+	default:
+		DEBUG(2, __FUNCTION__ "(), Unknown event %d\n", event);
+		break;
+	}
+	
+	if (skb)
+		dev_kfree_skb(skb);
+
+	return 0;
+}
+
+/*
+ * Function irlan_client_state_wait (self, event, skb, info)
+ *
+ *    WAIT, The irlan_client is waiting for the local provider to enter the
+ *    provider OPEN state.
+ *
+ */
+static int irlan_client_state_wait(struct irlan_cb *self, IRLAN_EVENT event, 
+				   struct sk_buff *skb) 
+{
+	DEBUG(4, __FUNCTION__ "()\n");
+	
+	ASSERT(self != NULL, return -1;);
+	
+	switch(event) {
+	case IRLAN_PROVIDER_SIGNAL:
+		irlan_next_client_state(self, IRLAN_ARB);
+		irlan_do_client_event(self, IRLAN_CHECK_CON_ARB, NULL);
+		break;
+	case IRLAN_LMP_DISCONNECT:
+	case IRLAN_LAP_DISCONNECT:
+		irlan_next_client_state(self, IRLAN_IDLE);
+		break;
+	case IRLAN_WATCHDOG_TIMEOUT:
+		DEBUG(2, __FUNCTION__ "(), IRLAN_WATCHDOG_TIMEOUT\n");
+		break;
+	default:
+		DEBUG(2, __FUNCTION__ "(), Unknown event %d\n", event);
+		break;
+	}
+	if (skb)
+		dev_kfree_skb(skb);
+	
+	return 0;
+}
+
+static int irlan_client_state_arb(struct irlan_cb *self, IRLAN_EVENT event, 
+				  struct sk_buff *skb) 
+{
+	struct qos_info qos;
+
+	DEBUG(2, __FUNCTION__ "()\n");
+
+	ASSERT(self != NULL, return -1;);
+	
+	switch(event) {
+	case IRLAN_CHECK_CON_ARB:
+		if (self->client.recv_arb_val == self->provider.send_arb_val) {
+			irlan_next_client_state(self, IRLAN_CLOSE);
+			irlan_close_data_channel(self);
+		} else if (self->client.recv_arb_val < 
+			   self->provider.send_arb_val) 
+		{
+			qos.link_disc_time.bits = 0x01; /* 3 secs */
+
+			irlan_next_client_state(self, IRLAN_DATA);
+			irttp_connect_request(self->tsap_data, 
+					      self->dtsap_sel_data, 
+					      self->saddr, self->daddr, &qos, 
+					      IRLAN_MTU, NULL);
+		} else if (self->client.recv_arb_val >
+			   self->provider.send_arb_val) 
+		{
+			DEBUG(2, __FUNCTION__ "(), lost the battle :-(\n");
+		}
+		break;
+	case IRLAN_DATA_CONNECT_INDICATION:
+		irlan_next_client_state(self, IRLAN_DATA);
+		break;
+	case IRLAN_LMP_DISCONNECT:
+	case IRLAN_LAP_DISCONNECT:
+		irlan_next_client_state(self, IRLAN_IDLE);
+		break;
+	case IRLAN_WATCHDOG_TIMEOUT:
+		DEBUG(2, __FUNCTION__ "(), IRLAN_WATCHDOG_TIMEOUT\n");
+		break;
+	default:
+		DEBUG(2, __FUNCTION__ "(), Unknown event %d\n", event);
+		break;
+	}
+	if (skb)
+		dev_kfree_skb(skb);
+	
+	return 0;
+}
+
+/*
+ * Function irlan_client_state_data (self, event, skb, info)
+ *
+ *    DATA, The data channel is connected, allowing data transfers between
+ *    the local and remote machines.
+ *
+ */
+static int irlan_client_state_data(struct irlan_cb *self, IRLAN_EVENT event, 
+				   struct sk_buff *skb) 
+{
+	DEBUG(4, __FUNCTION__ "()\n");
+
+	ASSERT(self != NULL, return -1;);
+	ASSERT(self->magic == IRLAN_MAGIC, return -1;);
+
+	switch(event) {
+	case IRLAN_DATA_INDICATION:
+		irlan_client_extract_params(self, skb);
+		break;		
+	case IRLAN_LMP_DISCONNECT: /* FALLTHROUGH */
+	case IRLAN_LAP_DISCONNECT:
+		irlan_next_client_state(self, IRLAN_IDLE);
+		break;
+	default:
+		DEBUG(2, __FUNCTION__ "(), Unknown event %d\n", event);
+		break;
+	}
+	if (skb)
+		dev_kfree_skb(skb);
+	
+	return 0;
+}
+
+/*
+ * Function irlan_client_state_close (self, event, skb, info)
+ *
+ *    
+ *
+ */
+static int irlan_client_state_close(struct irlan_cb *self, IRLAN_EVENT event, 
+				    struct sk_buff *skb) 
+{
+	DEBUG(2, __FUNCTION__ "()\n");
+
+	if (skb)
+		dev_kfree_skb(skb);
+
+	return 0;
+}
+
+/*
+ * Function irlan_client_state_sync (self, event, skb, info)
+ *
+ *    
+ *
+ */
+static int irlan_client_state_sync(struct irlan_cb *self, IRLAN_EVENT event, 
+				   struct sk_buff *skb) 
+{
+	DEBUG(2, __FUNCTION__ "()\n");
+	
+	if (skb)
+		dev_kfree_skb(skb);
+	
+	return 0;
+}
+
+
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