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-rw-r--r--net/irda/iriap_event.c496
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diff --git a/net/irda/iriap_event.c b/net/irda/iriap_event.c
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+/*********************************************************************
+ *
+ * Filename: iriap_event.c
+ * Version: 0.1
+ * Description: IAP Finite State Machine
+ * Status: Experimental.
+ * Author: Dag Brattli <dagb@cs.uit.no>
+ * Created at: Thu Aug 21 00:02:07 1997
+ * Modified at: Wed Mar 1 11:28:34 2000
+ * Modified by: Dag Brattli <dagb@cs.uit.no>
+ *
+ * Copyright (c) 1997, 1999-2000 Dag Brattli <dagb@cs.uit.no>,
+ * All Rights Reserved.
+ * Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * Neither Dag Brattli nor University of Tromsø admit liability nor
+ * provide warranty for any of this software. This material is
+ * provided "AS-IS" and at no charge.
+ *
+ ********************************************************************/
+
+#include <linux/slab.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/irlmp.h>
+#include <net/irda/iriap.h>
+#include <net/irda/iriap_event.h>
+
+static void state_s_disconnect (struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb);
+static void state_s_connecting (struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb);
+static void state_s_call (struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb);
+
+static void state_s_make_call (struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb);
+static void state_s_calling (struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb);
+static void state_s_outstanding (struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb);
+static void state_s_replying (struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb);
+static void state_s_wait_for_call(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb);
+static void state_s_wait_active (struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb);
+
+static void state_r_disconnect (struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb);
+static void state_r_call (struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb);
+static void state_r_waiting (struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb);
+static void state_r_wait_active (struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb);
+static void state_r_receiving (struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb);
+static void state_r_execute (struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb);
+static void state_r_returning (struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb);
+
+static void (*iriap_state[])(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb) = {
+ /* Client FSM */
+ state_s_disconnect,
+ state_s_connecting,
+ state_s_call,
+
+ /* S-Call FSM */
+ state_s_make_call,
+ state_s_calling,
+ state_s_outstanding,
+ state_s_replying,
+ state_s_wait_for_call,
+ state_s_wait_active,
+
+ /* Server FSM */
+ state_r_disconnect,
+ state_r_call,
+
+ /* R-Connect FSM */
+ state_r_waiting,
+ state_r_wait_active,
+ state_r_receiving,
+ state_r_execute,
+ state_r_returning,
+};
+
+void iriap_next_client_state(struct iriap_cb *self, IRIAP_STATE state)
+{
+ IRDA_ASSERT(self != NULL, return;);
+ IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
+
+ self->client_state = state;
+}
+
+void iriap_next_call_state(struct iriap_cb *self, IRIAP_STATE state)
+{
+ IRDA_ASSERT(self != NULL, return;);
+ IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
+
+ self->call_state = state;
+}
+
+void iriap_next_server_state(struct iriap_cb *self, IRIAP_STATE state)
+{
+ IRDA_ASSERT(self != NULL, return;);
+ IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
+
+ self->server_state = state;
+}
+
+void iriap_next_r_connect_state(struct iriap_cb *self, IRIAP_STATE state)
+{
+ IRDA_ASSERT(self != NULL, return;);
+ IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
+
+ self->r_connect_state = state;
+}
+
+void iriap_do_client_event(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ IRDA_ASSERT(self != NULL, return;);
+ IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
+
+ (*iriap_state[ self->client_state]) (self, event, skb);
+}
+
+void iriap_do_call_event(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ IRDA_ASSERT(self != NULL, return;);
+ IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
+
+ (*iriap_state[ self->call_state]) (self, event, skb);
+}
+
+void iriap_do_server_event(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ IRDA_ASSERT(self != NULL, return;);
+ IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
+
+ (*iriap_state[ self->server_state]) (self, event, skb);
+}
+
+void iriap_do_r_connect_event(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ IRDA_ASSERT(self != NULL, return;);
+ IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
+
+ (*iriap_state[ self->r_connect_state]) (self, event, skb);
+}
+
+
+/*
+ * Function state_s_disconnect (event, skb)
+ *
+ * S-Disconnect, The device has no LSAP connection to a particular
+ * remote device.
+ */
+static void state_s_disconnect(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ IRDA_ASSERT(self != NULL, return;);
+ IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
+
+ switch (event) {
+ case IAP_CALL_REQUEST_GVBC:
+ iriap_next_client_state(self, S_CONNECTING);
+ IRDA_ASSERT(self->request_skb == NULL, return;);
+ /* Don't forget to refcount it -
+ * see iriap_getvaluebyclass_request(). */
+ skb_get(skb);
+ self->request_skb = skb;
+ iriap_connect_request(self);
+ break;
+ case IAP_LM_DISCONNECT_INDICATION:
+ break;
+ default:
+ pr_debug("%s(), Unknown event %d\n", __func__, event);
+ break;
+ }
+}
+
+/*
+ * Function state_s_connecting (self, event, skb)
+ *
+ * S-Connecting
+ *
+ */
+static void state_s_connecting(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ IRDA_ASSERT(self != NULL, return;);
+ IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
+
+ switch (event) {
+ case IAP_LM_CONNECT_CONFIRM:
+ /*
+ * Jump to S-Call FSM
+ */
+ iriap_do_call_event(self, IAP_CALL_REQUEST, skb);
+ /* iriap_call_request(self, 0,0,0); */
+ iriap_next_client_state(self, S_CALL);
+ break;
+ case IAP_LM_DISCONNECT_INDICATION:
+ /* Abort calls */
+ iriap_next_call_state(self, S_MAKE_CALL);
+ iriap_next_client_state(self, S_DISCONNECT);
+ break;
+ default:
+ pr_debug("%s(), Unknown event %d\n", __func__, event);
+ break;
+ }
+}
+
+/*
+ * Function state_s_call (self, event, skb)
+ *
+ * S-Call, The device can process calls to a specific remote
+ * device. Whenever the LSAP connection is disconnected, this state
+ * catches that event and clears up
+ */
+static void state_s_call(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ IRDA_ASSERT(self != NULL, return;);
+
+ switch (event) {
+ case IAP_LM_DISCONNECT_INDICATION:
+ /* Abort calls */
+ iriap_next_call_state(self, S_MAKE_CALL);
+ iriap_next_client_state(self, S_DISCONNECT);
+ break;
+ default:
+ pr_debug("state_s_call: Unknown event %d\n", event);
+ break;
+ }
+}
+
+/*
+ * Function state_s_make_call (event, skb)
+ *
+ * S-Make-Call
+ *
+ */
+static void state_s_make_call(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ struct sk_buff *tx_skb;
+
+ IRDA_ASSERT(self != NULL, return;);
+
+ switch (event) {
+ case IAP_CALL_REQUEST:
+ /* Already refcounted - see state_s_disconnect() */
+ tx_skb = self->request_skb;
+ self->request_skb = NULL;
+
+ irlmp_data_request(self->lsap, tx_skb);
+ iriap_next_call_state(self, S_OUTSTANDING);
+ break;
+ default:
+ pr_debug("%s(), Unknown event %d\n", __func__, event);
+ break;
+ }
+}
+
+/*
+ * Function state_s_calling (event, skb)
+ *
+ * S-Calling
+ *
+ */
+static void state_s_calling(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ pr_debug("%s(), Not implemented\n", __func__);
+}
+
+/*
+ * Function state_s_outstanding (event, skb)
+ *
+ * S-Outstanding, The device is waiting for a response to a command
+ *
+ */
+static void state_s_outstanding(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ IRDA_ASSERT(self != NULL, return;);
+
+ switch (event) {
+ case IAP_RECV_F_LST:
+ /*iriap_send_ack(self);*/
+ /*LM_Idle_request(idle); */
+
+ iriap_next_call_state(self, S_WAIT_FOR_CALL);
+ break;
+ default:
+ pr_debug("%s(), Unknown event %d\n", __func__, event);
+ break;
+ }
+}
+
+/*
+ * Function state_s_replying (event, skb)
+ *
+ * S-Replying, The device is collecting a multiple part response
+ */
+static void state_s_replying(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ pr_debug("%s(), Not implemented\n", __func__);
+}
+
+/*
+ * Function state_s_wait_for_call (event, skb)
+ *
+ * S-Wait-for-Call
+ *
+ */
+static void state_s_wait_for_call(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ pr_debug("%s(), Not implemented\n", __func__);
+}
+
+
+/*
+ * Function state_s_wait_active (event, skb)
+ *
+ * S-Wait-Active
+ *
+ */
+static void state_s_wait_active(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ pr_debug("%s(), Not implemented\n", __func__);
+}
+
+/**************************************************************************
+ *
+ * Server FSM
+ *
+ **************************************************************************/
+
+/*
+ * Function state_r_disconnect (self, event, skb)
+ *
+ * LM-IAS server is disconnected (not processing any requests!)
+ *
+ */
+static void state_r_disconnect(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ struct sk_buff *tx_skb;
+
+ switch (event) {
+ case IAP_LM_CONNECT_INDICATION:
+ tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
+ if (tx_skb == NULL)
+ return;
+
+ /* Reserve space for MUX_CONTROL and LAP header */
+ skb_reserve(tx_skb, LMP_MAX_HEADER);
+
+ irlmp_connect_response(self->lsap, tx_skb);
+ /*LM_Idle_request(idle); */
+
+ iriap_next_server_state(self, R_CALL);
+
+ /*
+ * Jump to R-Connect FSM, we skip R-Waiting since we do not
+ * care about LM_Idle_request()!
+ */
+ iriap_next_r_connect_state(self, R_RECEIVING);
+ break;
+ default:
+ pr_debug("%s(), unknown event %d\n", __func__, event);
+ break;
+ }
+}
+
+/*
+ * Function state_r_call (self, event, skb)
+ */
+static void state_r_call(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ switch (event) {
+ case IAP_LM_DISCONNECT_INDICATION:
+ /* Abort call */
+ iriap_next_server_state(self, R_DISCONNECT);
+ iriap_next_r_connect_state(self, R_WAITING);
+ break;
+ default:
+ pr_debug("%s(), unknown event!\n", __func__);
+ break;
+ }
+}
+
+/*
+ * R-Connect FSM
+ */
+
+/*
+ * Function state_r_waiting (self, event, skb)
+ */
+static void state_r_waiting(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ pr_debug("%s(), Not implemented\n", __func__);
+}
+
+static void state_r_wait_active(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ pr_debug("%s(), Not implemented\n", __func__);
+}
+
+/*
+ * Function state_r_receiving (self, event, skb)
+ *
+ * We are receiving a command
+ *
+ */
+static void state_r_receiving(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ switch (event) {
+ case IAP_RECV_F_LST:
+ iriap_next_r_connect_state(self, R_EXECUTE);
+
+ iriap_call_indication(self, skb);
+ break;
+ default:
+ pr_debug("%s(), unknown event!\n", __func__);
+ break;
+ }
+}
+
+/*
+ * Function state_r_execute (self, event, skb)
+ *
+ * The server is processing the request
+ *
+ */
+static void state_r_execute(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ IRDA_ASSERT(skb != NULL, return;);
+ IRDA_ASSERT(self != NULL, return;);
+ IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
+
+ switch (event) {
+ case IAP_CALL_RESPONSE:
+ /*
+ * Since we don't implement the Waiting state, we return
+ * to state Receiving instead, DB.
+ */
+ iriap_next_r_connect_state(self, R_RECEIVING);
+
+ /* Don't forget to refcount it - see
+ * iriap_getvaluebyclass_response(). */
+ skb_get(skb);
+
+ irlmp_data_request(self->lsap, skb);
+ break;
+ default:
+ pr_debug("%s(), unknown event!\n", __func__);
+ break;
+ }
+}
+
+static void state_r_returning(struct iriap_cb *self, IRIAP_EVENT event,
+ struct sk_buff *skb)
+{
+ pr_debug("%s(), event=%d\n", __func__, event);
+
+ switch (event) {
+ case IAP_RECV_F_LST:
+ break;
+ default:
+ break;
+ }
+}
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