bacpaction.c

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/* bacpaction.c - BACP state machine actions */

/* Copyright 1999 Wind River Systems, Inc. */

#include "copyright_wrs.h"


/*
modification history
--------------------
02a,05nov01,as  code cleanup to support an extra parameter in bacpUpcall
01a,10feb01,sd 	created
*/

/*
DESCRIPTION
This module implements the action table functions of BACP component.

These functions are called from the execute state machine functions to 
take the corresponding action. These functions also raise the BACP_UP 
and BACP_DOWN event. Once the BACP is UP, the MP's interface is used
to initialize the active port queue.
*/


/* includes */

#include "private/ppp/pppoptn.h"
#include "ppp/pppBacpComponent.h"
#include "private/ppp/pppBacpComponentP.h"
#include "sllLib.h"

/* defines */

LOCAL void bacp_this_layer_start (PFW_PLUGIN_OBJ_STATE * pluginObjState,
					M_BLK_ID pMblk, PPP_STATE end_state);

LOCAL void bacp_this_layer_finished (PFW_PLUGIN_OBJ_STATE * pluginObjState,
					M_BLK_ID pMblk, PPP_STATE end_state);

LOCAL void bacp_this_layer_up (PFW_PLUGIN_OBJ_STATE * pluginObjState,
					M_BLK_ID pMblk, PPP_STATE end_state);

LOCAL void bacp_this_layer_down (PFW_PLUGIN_OBJ_STATE * pluginObjState,
					M_BLK_ID pMblk, PPP_STATE end_state);

LOCAL void bacp_initialize_restart_counters 
				(PFW_PLUGIN_OBJ_STATE * pluginObjState,
				 M_BLK_ID pMblk, PPP_STATE end_state);

LOCAL void bacp_zero_restart_counters (PFW_PLUGIN_OBJ_STATE * pluginObjState,
					M_BLK_ID pMblk, PPP_STATE end_state);

STATE_MACHINE_ACTION_TABLE bacpStateActionTable =
				{
				bacpSetState,
				bacpNullState,
				bacp_this_layer_start,
				bacp_this_layer_finished,
				bacp_this_layer_up,
				bacp_this_layer_down,
				bacp_initialize_restart_counters,
				bacp_zero_restart_counters,
				NULL,/* send_configuration_request */
				NULL,/* send_configuration_ack */
				NULL,/* send_configuration_nak */
				NULL,/* send_configuration_reject */
				NULL,/* send_termination_request */
				NULL,/* send_termination_ack */
				NULL,/* send_code_reject */
				};


/*******************************************************************************
* bacp_this_layer_start - this layer start action
*
* This function is called when this layer moves on to start state. 
* stackData state is updated to the input state.
*
* RETURNS: N/A
*/
LOCAL void bacp_this_layer_start
	(
	PFW_PLUGIN_OBJ_STATE * pluginState,		/* state for the stack */
	M_BLK_ID  packet,						/* BACP packet */
	PPP_STATE end_state						/* end state */
	)
	{
	BACP_CONTROL_PROTOCOL_STATE_DATA *pStateData = 
				(BACP_CONTROL_PROTOCOL_STATE_DATA *) pluginState->stackData;
	BACP_STACK_DATA *pStackData = pluginState->stackData;
	PFW_STACK_OBJ * pManagerStackObj = pluginState->stackObj;

	/* set the end state */

	pStateData->state = end_state;

	/* call the BODA upcall */

	if (pStackData->bacpUpcall != NULL)
		{
		pStackData->bacpUpcall->bacpUpCallFunction (
			pManagerStackObj, BACP_EVENT_THIS_LAYER_START, 0, NULL, 0, NULL);
		}

	if (packet != NULL)
		{
		netMblkClChainFree (packet);
		}

    }

/*******************************************************************************
* bacp_this_layer_finished - this layer finished action.
*
* This function is called when this layer moves on to finished state.
* Control layer's interface function is called to inform the same.
*
* RETURNS: N/A
*/
LOCAL void bacp_this_layer_finished
	(
	PFW_PLUGIN_OBJ_STATE * pluginState,		/* state for the stack */
	M_BLK_ID  packet,						/* BACP packet */
	PPP_STATE end_state						/* end state */
	)
	{
	BACP_STACK_DATA * pStackData = (BACP_STACK_DATA *)pluginState->stackData;
	PFW_STACK_OBJ * pManagerStackObj = pluginState->stackObj;

	PARAMETER_NOT_USED (end_state);

	if (packet != NULL)
		{
		netMblkClChainFree (packet);
		}

	/* reset the counters */

	pStackData->number_of_configuration_requests = 0x0000;
	pStackData->number_of_termination_requests   = 0x0000;

	/* cancel retry timer */

	pfwTimerCancel (pStackData->retryTimer);


	if (pStackData->last_txed_bacp_configuration_request_packet != NULL)
		{
		netMblkClChainFree (
		pStackData->last_txed_bacp_configuration_request_packet);

		pStackData->last_txed_bacp_configuration_request_packet = NULL;
		}

	/* tell other components on this stack that BACP is DOWN */

	pfwEventRaise (pluginState->stackObj, pStackData->bacpDownEventObj,
				NULL);

	/* call the BODA upcall */

	if (pStackData->bacpUpcall != NULL)
		{
		pStackData->bacpUpcall->bacpUpCallFunction (
			pManagerStackObj, BACP_EVENT_THIS_LAYER_FINISHED, 0, NULL, 0, NULL);
		}

	/* tell layer that bacp is finished */

	pStackData->controlLayerInterface->protocolFinished (pluginState);

    }

/*******************************************************************************
* bacp_this_layer_up - this layer up action
*
* This function is called when this layer is "UP". 
* Control layer's interface function is called to inform the same.
*
* RETURNS: N/A
*/
LOCAL void bacp_this_layer_up
	(
	PFW_PLUGIN_OBJ_STATE * pluginState,		/* state for the stack */
	M_BLK_ID  packet,						/* BACP packet */
	PPP_STATE end_state						/* end state */
	)
	{

	BACP_STACK_DATA *pStackData = (BACP_STACK_DATA *)pluginState->stackData;
	PFW_STACK_OBJ * pManagerStackObj = pluginState->stackObj;
	

	PARAMETER_NOT_USED (end_state);

	/* cancel config request retry */

	pfwTimerCancel (pStackData->retryTimer);

	/* tell other components on this stack that BACP is done negotiating */

	pfwEventRaise (pluginState->stackObj, pStackData->bacpUpEventObj,
				pluginState);

	/* free the packets */

	if (packet != NULL)
		netMblkClChainFree (packet);

	if (pStackData->last_txed_bacp_configuration_request_packet != NULL)
		{
		netMblkClChainFree (
			pStackData->last_txed_bacp_configuration_request_packet);

		pStackData->last_txed_bacp_configuration_request_packet = NULL;
		}

	/* tell layer that BACP is up */

	pStackData->controlLayerInterface->protocolUp (pluginState);

	/* call the BODA upcall */

	if (pStackData->bacpUpcall != NULL)
		pStackData->bacpUpcall->bacpUpCallFunction 
					(pManagerStackObj, BACP_EVENT_THIS_LAYER_UP, 0, NULL, 0, NULL);

    }

/*******************************************************************************
* bacp_this_layer_down - this layer down action 
* 
* This function is called when this layer is down. Control layer's interface 
* function is called to inform the same.
*
* RETURNS: N/A
*/
LOCAL void bacp_this_layer_down
	(
	PFW_PLUGIN_OBJ_STATE * pluginState,		/* state for the stack */
	M_BLK_ID  packet,						/* BACP packet */
	PPP_STATE end_state						/* end state */
	)
	{
	BACP_STACK_DATA *pStackData = (BACP_STACK_DATA *)pluginState->stackData;
	PFW_STACK_OBJ * pManagerStackObj = pluginState->stackObj;

	PARAMETER_NOT_USED (end_state);

	/* cancel the timer */

	pfwTimerCancel (pStackData->retryTimer); 

	/* free the packet */

	if (packet != NULL)
		{
		netMblkClChainFree (packet);
		}


	if (pStackData->last_txed_bacp_configuration_request_packet != NULL)
		{
		netMblkClChainFree (
			pStackData->last_txed_bacp_configuration_request_packet);

		pStackData->last_txed_bacp_configuration_request_packet = NULL;
		}
	
	/* reset the counters */

	pStackData->number_of_configuration_requests = 0x0000;
	pStackData->number_of_termination_requests   = 0x0000;

    /* free tx_accepted list to allow fresh start from configured options */

	free_ppp_tx_accepted_option_list (&pStackData->option_lists.tx_accepted);


	/* call the BODA upcall */

	if (pStackData->bacpUpcall != NULL)
		{
		pStackData->bacpUpcall->bacpUpCallFunction 
					(pManagerStackObj, BACP_EVENT_THIS_LAYER_DOWN, 0, NULL, 0, NULL);
		}

	/* tell layer that BACP is down */

	pStackData->controlLayerInterface->protocolDown (pluginState, end_state);

    }

/*******************************************************************************
* bacp_initialize_restart_counters - initialize restart counters
*
* This function is called when this layer is needed to go into Initialization 
* State. All the necessary counters are initialized.
*
* RETURNS: N/A
*/
LOCAL void bacp_initialize_restart_counters
	(
	PFW_PLUGIN_OBJ_STATE * pluginState,		/* state for the stack */
	M_BLK_ID  packet,						/* BACP packet */
	PPP_STATE end_state						/* end state */
	)
	{
	BACP_STACK_DATA *pStackData = (BACP_STACK_DATA *)pluginState->stackData;

	PARAMETER_NOT_USED (end_state);


	pStackData->number_of_configuration_requests = 0x0000;
	pStackData->number_of_termination_requests   = 0x0000;

	if (packet != NULL)
		netMblkClChainFree (packet);
    }

/*******************************************************************************
* bacp_zero_restart_counters - zero restart counters
*
* This function is called when this layer is needed to zero the various counters. 
* All the necessary counters are initialized to zero.
*
* RETURNS: N/A
*/
LOCAL void bacp_zero_restart_counters
	(
	PFW_PLUGIN_OBJ_STATE * pluginState,		/* state for the stack */
	M_BLK_ID  packet,						/* BACP packet */
	PPP_STATE end_state						/* end state */
	)
	{
	BACP_STACK_DATA *pStackData = (BACP_STACK_DATA *)pluginState->stackData;

	PARAMETER_NOT_USED (end_state);

	pStackData->number_of_configuration_requests = 0x0000;
	pStackData->number_of_termination_requests   = 0x0000;

	if (packet != NULL)
		netMblkClChainFree (packet);

    }