+++ /dev/null
-/*********************************************************************
- *
- * 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;
- }
-}
projects / linux-2.6-block.git / blobdiff