patch-2.2.15 linux/net/irda/ircomm/ircomm_event.c

• Lines: 258
• Date: Fri Apr 21 12:47:16 2000
• Orig file: v2.2.14/net/irda/ircomm/ircomm_event.c
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from ../../exclude v2.2.14/net/irda/ircomm/ircomm_event.c linux/net/irda/ircomm/ircomm_event.c
@@ -0,0 +1,257 @@
+/*********************************************************************
+ *                
+ * Filename:      ircomm_event.c
+ * Version:       1.0
+ * Description:   IrCOMM layer state machine
+ * Status:        Stable
+ * Author:        Dag Brattli <dagb@cs.uit.no>
+ * Created at:    Sun Jun  6 20:33:11 1999
+ * Modified at:   Sun Dec 12 13:44:32 1999
+ * Modified by:   Dag Brattli <dagb@cs.uit.no>
+ * 
+ *     Copyright (c) 1999 Dag Brattli, 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.
+ * 
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *     GNU General Public License for more details.
+ * 
+ *     You should have received a copy of the GNU General Public License 
+ *     along with this program; if not, write to the Free Software 
+ *     Foundation, Inc., 59 Temple Place, Suite 330, Boston, 
+ *     MA 02111-1307 USA
+ *     
+ ********************************************************************/
+
+#include <linux/sched.h>
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/irlmp.h>
+#include <net/irda/iriap.h>
+#include <net/irda/irttp.h>
+#include <net/irda/irias_object.h>
+
+#include <net/irda/ircomm_core.h>
+#include <net/irda/ircomm_event.h>
+
+static int ircomm_state_idle(struct ircomm_cb *self, IRCOMM_EVENT event, 
+			     struct sk_buff *skb, struct ircomm_info *info);
+static int ircomm_state_waiti(struct ircomm_cb *self, IRCOMM_EVENT event, 
+			      struct sk_buff *skb, struct ircomm_info *info);
+static int ircomm_state_waitr(struct ircomm_cb *self, IRCOMM_EVENT event, 
+			      struct sk_buff *skb, struct ircomm_info *info);
+static int ircomm_state_conn(struct ircomm_cb *self, IRCOMM_EVENT event, 
+			     struct sk_buff *skb, struct ircomm_info *info);
+
+char *ircomm_state[] = {
+	"IRCOMM_IDLE",
+	"IRCOMM_WAITI",
+	"IRCOMM_WAITR",
+	"IRCOMM_CONN",
+};
+
+char *ircomm_event[] = {
+	"IRCOMM_CONNECT_REQUEST",
+        "IRCOMM_CONNECT_RESPONSE",
+        "IRCOMM_TTP_CONNECT_INDICATION",
+	"IRCOMM_LMP_CONNECT_INDICATION",
+        "IRCOMM_TTP_CONNECT_CONFIRM",
+	"IRCOMM_LMP_CONNECT_CONFIRM",
+
+        "IRCOMM_LMP_DISCONNECT_INDICATION",
+	"IRCOMM_TTP_DISCONNECT_INDICATION",
+        "IRCOMM_DISCONNECT_REQUEST",
+
+        "IRCOMM_TTP_DATA_INDICATION",
+	"IRCOMM_LMP_DATA_INDICATION",
+        "IRCOMM_DATA_REQUEST",
+        "IRCOMM_CONTROL_REQUEST",
+        "IRCOMM_CONTROL_INDICATION",
+};
+
+static int (*state[])(struct ircomm_cb *self, IRCOMM_EVENT event,
+		      struct sk_buff *skb, struct ircomm_info *info) = 
+{
+	ircomm_state_idle,
+	ircomm_state_waiti,
+	ircomm_state_waitr,
+	ircomm_state_conn,
+};
+
+/*
+ * Function ircomm_state_idle (self, event, skb)
+ *
+ *    IrCOMM is currently idle
+ *
+ */
+static int ircomm_state_idle(struct ircomm_cb *self, IRCOMM_EVENT event, 
+			     struct sk_buff *skb, struct ircomm_info *info)
+{
+	int ret = 0;
+
+	switch (event) {
+	case IRCOMM_CONNECT_REQUEST:
+		ircomm_next_state(self, IRCOMM_WAITI);		
+		ret = self->issue.connect_request(self, skb, info);
+		break;
+	case IRCOMM_TTP_CONNECT_INDICATION:
+	case IRCOMM_LMP_CONNECT_INDICATION:
+		ircomm_next_state(self, IRCOMM_WAITR);
+		ircomm_connect_indication(self, skb, info);
+		break;
+	default:
+		IRDA_DEBUG(4, __FUNCTION__"(), unknown event: %s\n",
+			   ircomm_event[event]);
+		if (skb)
+			dev_kfree_skb(skb);
+		return -EINVAL;
+	}
+	return ret;
+}
+
+/*
+ * Function ircomm_state_waiti (self, event, skb)
+ *
+ *    The IrCOMM user has requested an IrCOMM connection to the remote 
+ *    device and is awaiting confirmation
+ */
+static int ircomm_state_waiti(struct ircomm_cb *self, IRCOMM_EVENT event, 
+			      struct sk_buff *skb, struct ircomm_info *info)
+{
+	int ret = 0;
+
+	switch (event) {
+	case IRCOMM_TTP_CONNECT_CONFIRM:
+	case IRCOMM_LMP_CONNECT_CONFIRM:
+		ircomm_next_state(self, IRCOMM_CONN);
+		ircomm_connect_confirm(self, skb, info);
+		break;
+	case IRCOMM_TTP_DISCONNECT_INDICATION:
+	case IRCOMM_LMP_DISCONNECT_INDICATION:
+		ircomm_next_state(self, IRCOMM_IDLE);
+		ircomm_disconnect_indication(self, skb, info);
+		break;
+	default:
+		IRDA_DEBUG(0, __FUNCTION__"(), unknown event: %s\n",
+			   ircomm_event[event]);
+		if (skb)
+			dev_kfree_skb(skb);
+		ret = -EINVAL;
+	}
+	return ret;
+}
+
+/*
+ * Function ircomm_state_waitr (self, event, skb)
+ *
+ *    IrCOMM has received an incomming connection request and is awaiting
+ *    response from the user
+ */
+static int ircomm_state_waitr(struct ircomm_cb *self, IRCOMM_EVENT event, 
+			      struct sk_buff *skb, struct ircomm_info *info) 
+{
+	int ret = 0;
+
+	switch (event) {
+	case IRCOMM_CONNECT_RESPONSE:
+		ircomm_next_state(self, IRCOMM_CONN);
+		ret = self->issue.connect_response(self, skb);
+		break;
+	case IRCOMM_DISCONNECT_REQUEST:
+		ircomm_next_state(self, IRCOMM_IDLE);
+		ret = self->issue.disconnect_request(self, skb, info);
+		break;
+	case IRCOMM_TTP_DISCONNECT_INDICATION:
+	case IRCOMM_LMP_DISCONNECT_INDICATION:
+		ircomm_next_state(self, IRCOMM_IDLE);
+		ircomm_disconnect_indication(self, skb, info);
+		break;
+	default:
+		IRDA_DEBUG(0, __FUNCTION__ "(), unknown event = %s\n",
+			   ircomm_event[event]);
+		if (skb)
+			dev_kfree_skb(skb);
+		ret = -EINVAL;
+	}
+	return ret;
+}
+
+/*
+ * Function ircomm_state_conn (self, event, skb)
+ *
+ *    IrCOMM is connected to the peer IrCOMM device
+ *
+ */
+static int ircomm_state_conn(struct ircomm_cb *self, IRCOMM_EVENT event, 
+			     struct sk_buff *skb, struct ircomm_info *info)
+{
+	int ret = 0;
+
+	switch (event) {
+	case IRCOMM_DATA_REQUEST:
+		ret = self->issue.data_request(self, skb, 0);
+		break;
+	case IRCOMM_TTP_DATA_INDICATION:
+		ircomm_process_data(self, skb);
+		break;
+	case IRCOMM_LMP_DATA_INDICATION:
+		ircomm_data_indication(self, skb);
+		break;
+	case IRCOMM_CONTROL_REQUEST:
+		/* Just send a separate frame for now */
+		ret = self->issue.data_request(self, skb, skb->len);
+		break;
+	case IRCOMM_TTP_DISCONNECT_INDICATION:
+	case IRCOMM_LMP_DISCONNECT_INDICATION:
+		ircomm_next_state(self, IRCOMM_IDLE);
+		ircomm_disconnect_indication(self, skb, info);
+		break;
+	case IRCOMM_DISCONNECT_REQUEST:
+		ircomm_next_state(self, IRCOMM_IDLE);
+		ret = self->issue.disconnect_request(self, skb, info);
+		break;
+	default:
+		IRDA_DEBUG(0, __FUNCTION__ "(), unknown event = %s\n",
+			   ircomm_event[event]);
+		if (skb)
+			dev_kfree_skb(skb);
+		ret = -EINVAL;
+	}
+	return ret;
+}
+
+/*
+ * Function ircomm_do_event (self, event, skb)
+ *
+ *    Process event
+ *
+ */
+int ircomm_do_event(struct ircomm_cb *self, IRCOMM_EVENT event,
+		    struct sk_buff *skb, struct ircomm_info *info) 
+{
+	IRDA_DEBUG(4, __FUNCTION__": state=%s, event=%s\n",
+		   ircomm_state[self->state], ircomm_event[event]);
+
+	return (*state[self->state])(self, event, skb, info);
+}
+
+/*
+ * Function ircomm_next_state (self, state)
+ *
+ *    Switch state
+ *
+ */
+void ircomm_next_state(struct ircomm_cb *self, IRCOMM_STATE state)
+{
+	self->state = state;
+	
+	IRDA_DEBUG(4, __FUNCTION__": next state=%s, service type=%d\n", 
+		   ircomm_state[self->state], self->service_type);
+}