Viewing file:  iriap_event.c (12.18 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*********************************************************************
*
* 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.
*
* 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 <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)
{
ASSERT(self != NULL, return;);
ASSERT(self->magic == IAS_MAGIC, return;);
self->client_state = state;
}
void iriap_next_call_state(struct iriap_cb *self, IRIAP_STATE state)
{
ASSERT(self != NULL, return;);
ASSERT(self->magic == IAS_MAGIC, return;);
self->call_state = state;
}
void iriap_next_server_state(struct iriap_cb *self, IRIAP_STATE state)
{
ASSERT(self != NULL, return;);
ASSERT(self->magic == IAS_MAGIC, return;);
self->server_state = state;
}
void iriap_next_r_connect_state(struct iriap_cb *self, IRIAP_STATE state)
{
ASSERT(self != NULL, return;);
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)
{
ASSERT(self != NULL, return;);
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)
{
ASSERT(self != NULL, return;);
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)
{
ASSERT(self != NULL, return;);
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)
{
ASSERT(self != NULL, return;);
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)
{
ASSERT(self != NULL, return;);
ASSERT(self->magic == IAS_MAGIC, return;);
switch (event) {
case IAP_CALL_REQUEST_GVBC:
iriap_next_client_state(self, S_CONNECTING);
ASSERT(self->skb == NULL, return;);
self->skb = skb;
iriap_connect_request(self);
break;
case IAP_LM_DISCONNECT_INDICATION:
break;
default:
IRDA_DEBUG(0, __FUNCTION__"(), Unknown event %d\n", 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)
{
ASSERT(self != NULL, return;);
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:
IRDA_DEBUG(0, __FUNCTION__ "(), Unknown event %d\n", 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)
{
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:
IRDA_DEBUG(0, "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)
{
ASSERT(self != NULL, return;);
switch (event) {
case IAP_CALL_REQUEST:
skb = self->skb;
self->skb = NULL;
irlmp_data_request(self->lsap, skb);
iriap_next_call_state(self, S_OUTSTANDING);
break;
default:
IRDA_DEBUG(0, __FUNCTION__ "(), Unknown event %d\n", event);
if (skb)
dev_kfree_skb(skb);
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)
{
IRDA_DEBUG(0, __FUNCTION__ "(), Not implemented\n");
}
/*
* 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)
{
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:
IRDA_DEBUG(0, __FUNCTION__ "(), Unknown event %d\n", 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)
{
IRDA_DEBUG(0, __FUNCTION__ "(), Not implemented\n");
}
/*
* 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)
{
IRDA_DEBUG(0, __FUNCTION__ "(), Not implemented\n");
}
/*
* 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)
{
IRDA_DEBUG(0, __FUNCTION__ "(), Not implemented\n");
}
/**************************************************************************
*
* 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 = dev_alloc_skb(64);
if (tx_skb == NULL) {
WARNING(__FUNCTION__ "(), unable to malloc!\n");
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);
if (skb)
dev_kfree_skb(skb);
break;
default:
IRDA_DEBUG(0, __FUNCTION__ "(), unknown event %d\n", 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)
{
IRDA_DEBUG(4, __FUNCTION__ "()\n");
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:
IRDA_DEBUG(0, __FUNCTION__ "(), unknown event!\n");
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)
{
IRDA_DEBUG(0, __FUNCTION__ "(), Not implemented\n");
}
static void state_r_wait_active(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_DEBUG(0, __FUNCTION__ "(), Not implemented\n");
}
/*
* 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)
{
IRDA_DEBUG(4, __FUNCTION__ "()\n");
switch (event) {
case IAP_RECV_F_LST:
iriap_next_r_connect_state(self, R_EXECUTE);
iriap_call_indication(self, skb);
break;
default:
IRDA_DEBUG(0, __FUNCTION__ "(), unknown event!\n");
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_DEBUG(4, __FUNCTION__ "()\n");
ASSERT(skb != NULL, return;);
if (!self || self->magic != IAS_MAGIC) {
IRDA_DEBUG(0, __FUNCTION__ "(), bad pointer self\n");
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);
irlmp_data_request(self->lsap, skb);
break;
default:
IRDA_DEBUG(0, __FUNCTION__ "(), unknown event!\n");
break;
}
}
static void state_r_returning(struct iriap_cb *self, IRIAP_EVENT event,
struct sk_buff *skb)
{
IRDA_DEBUG(0, __FUNCTION__ "(), event=%d\n", event);
switch (event) {
case IAP_RECV_F_LST:
break;
default:
break;
}
}
|