pppstate.c

这是全套的PPP协议的源码

	/* UP */                         {null_state,ILLEGAL_PPP_STATE}, 
	/* DOWN */                       {set_ppp_state,PPP_STARTING_STATE},
	/* OPEN	*/                       {set_ppp_state,PPP_REQUEST_SENT_STATE},
	/* CLOSE */                      {initialize_restart_counter,
	                                                NO_CHANGE_TO_PPP_STATE,
	                                  send_termination_request,
	                                                PPP_CLOSING_STATE},
	/* TIMEOUT_WITH_COUNTER_GREATER*/{send_configuration_request,
	                                                PPP_REQUEST_SENT_STATE},
	/* TIMEOUT_WITH_COUNTER_EXPIRED*/{this_layer_finished,
	                                                PPP_STOPPED_STATE},
	/* RX */
	/* CONFIGURE_REQUEST_GOOD */     {send_configuration_ack,
	                                                PPP_ACK_SENT_STATE},
	/* CONFIGURE_REQUEST_BAD */      {send_configuration_nak,
	                                                PPP_REQUEST_SENT_STATE},
	/* CONFIGURE_REQUEST_BAD_OPTION*/{send_configuration_reject,
	                                                PPP_REQUEST_SENT_STATE},
	/* CONFIGURE_ACK */              {initialize_restart_counter,
	                                                NO_CHANGE_TO_PPP_STATE,
	                                  set_ppp_state,PPP_ACK_RECEIVED_STATE},
	/* CONFIGURE_NAK */              {initialize_restart_counter,
	                                                NO_CHANGE_TO_PPP_STATE, 
	                                  send_configuration_request,
	                                                PPP_REQUEST_SENT_STATE},
	/* CONFIGURE_REJECT */           {initialize_restart_counter,
	                                                NO_CHANGE_TO_PPP_STATE, 
	                                  send_configuration_request,
	                                                PPP_REQUEST_SENT_STATE},
	/* TERMINATE_REQUEST */          {send_termination_ack,
	                                                PPP_REQUEST_SENT_STATE},
	/* TERMINATE_ACK */              {set_ppp_state,PPP_REQUEST_SENT_STATE},
	/* UNKNOWN_CODE */               {send_code_reject,
	                                                PPP_REQUEST_SENT_STATE},
	/* CODE_REJECT_PERMITTED */      {set_ppp_state,PPP_REQUEST_SENT_STATE},
	/* PROTOCOL_REJECT */            {set_ppp_state,PPP_REQUEST_SENT_STATE},
	/* CODE_REJECT_CATASTROPHIC */  {this_layer_finished,PPP_STOPPED_STATE},
	/* ECHO_REQUEST	*/               {set_ppp_state,PPP_REQUEST_SENT_STATE},
	/* ECHO_REPLY */                 {set_ppp_state,PPP_REQUEST_SENT_STATE},
	/* DISCARD_REQUEST */            {set_ppp_state,PPP_REQUEST_SENT_STATE},
	/* PPP_ECHO_RESPONSE_TIMEOUT */  {null_state,ILLEGAL_PPP_STATE},
	/* PPP_ECHO_RESPONSE_FAILURE */  {null_state,ILLEGAL_PPP_STATE}
	},
	{
	/* ----------------------------------------------------------------- */
	/* ACK_RECEIVED state: 7                                             */
	/* ----------------------------------------------------------------- */
	/* UP */                         {null_state,ILLEGAL_PPP_STATE}, 
	/* DOWN	*/                       {set_ppp_state,PPP_STARTING_STATE},
	/* OPEN	*/                       {set_ppp_state,PPP_ACK_RECEIVED_STATE},
	/* CLOSE */                      {initialize_restart_counter,
	                                                NO_CHANGE_TO_PPP_STATE,
	                                  send_termination_request,
	                                                PPP_CLOSING_STATE},
	/* TIMEOUT_WITH_COUNTER_GREATER*/{send_configuration_request,
	                                                PPP_REQUEST_SENT_STATE},
	/* TIMEOUT_WITH_COUNTER_EXPIRED*/{this_layer_finished,
	                                                PPP_STOPPED_STATE},
	/* RX */
	/* CONFIGURE_REQUEST_GOOD */     {send_configuration_ack,
	                                                NO_CHANGE_TO_PPP_STATE,
	                                  this_layer_up,PPP_OPENED_STATE},
	/* CONFIGURE_REQUEST_BAD */      {send_configuration_nak,
	                                                PPP_ACK_RECEIVED_STATE},
	/* CONFIGURE_REQUEST_BAD_OPTION	*/{send_configuration_reject,
	                                                PPP_ACK_RECEIVED_STATE},
	/* CONFIGURE_ACK */              {send_configuration_request,
	                                                PPP_REQUEST_SENT_STATE},
	/* CONFIGURE_NAK */              {send_configuration_request,
                                                        PPP_REQUEST_SENT_STATE},
	/* CONFIGURE_REJECT */           {send_configuration_request,
	                                                PPP_REQUEST_SENT_STATE},
	/* TERMINATE_REQUEST */          {send_termination_ack,
	                                                PPP_REQUEST_SENT_STATE},
	/* TERMINATE_ACK */              {set_ppp_state,PPP_REQUEST_SENT_STATE},
	/* UNKNOWN_CODE	*/               {send_code_reject,
	                                                PPP_ACK_RECEIVED_STATE},
	/* CODE_REJECT_PERMITTED */      {set_ppp_state,
	                                                PPP_REQUEST_SENT_STATE},
	/* PROTOCOL_REJECT */            {set_ppp_state,PPP_REQUEST_SENT_STATE},
	/* CODE_REJECT_CATASTROPHIC */  {this_layer_finished,PPP_STOPPED_STATE},
	/* ECHO_REQUEST */               {set_ppp_state,PPP_ACK_RECEIVED_STATE},
	/* ECHO_REPLY */                 {set_ppp_state,PPP_ACK_RECEIVED_STATE},
	/* DISCARD_REQUEST */            {set_ppp_state,PPP_ACK_RECEIVED_STATE},
	/* PPP_ECHO_RESPONSE_TIMEOUT */  {null_state,ILLEGAL_PPP_STATE},
	/* PPP_ECHO_RESPONSE_FAILURE */  {null_state,ILLEGAL_PPP_STATE}
	},
	{
	/* ----------------------------------------------------------------- */
	/* ACK_SENT state: 8                                                 */
	/* ----------------------------------------------------------------- */
	/* UP */                         {null_state,ILLEGAL_PPP_STATE}, 
	/* DOWN	*/                       {set_ppp_state,PPP_STARTING_STATE},
	/* OPEN */                       {set_ppp_state,PPP_ACK_SENT_STATE},
	/* CLOSE */                      {initialize_restart_counter,
	                                                NO_CHANGE_TO_PPP_STATE,
	                                  send_termination_request,
	                                                PPP_CLOSING_STATE},
	/* TIMEOUT_WITH_COUNTER_GREATER */{send_configuration_request,
	                                                PPP_ACK_SENT_STATE},
	/* TIMEOUT_WITH_COUNTER_EXPIRED */{this_layer_finished,
	                                                PPP_STOPPED_STATE},
	/* RX */
	/* CONFIGURE_REQUEST_GOOD */      {send_configuration_ack,
	                                                PPP_ACK_SENT_STATE},
	/* CONFIGURE_REQUEST_BAD */       {send_configuration_nak,
	                                                PPP_ACK_RECEIVED_STATE},
	/* CONFIGURE_REQUEST_BAD_OPTION */{send_configuration_reject,
	                                                PPP_ACK_RECEIVED_STATE},
	/* CONFIGURE_ACK */               {initialize_restart_counter,
	                                                NO_CHANGE_TO_PPP_STATE,
	                                        this_layer_up,PPP_OPENED_STATE},
	/* CONFIGURE_NAK */               {initialize_restart_counter,
	                                                NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_request,
                                                        PPP_ACK_SENT_STATE},
	/* CONFIGURE_REJECT */            {initialize_restart_counter,
	                                                NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_request,
	                                                PPP_ACK_SENT_STATE},
	/* TERMINATE_REQUEST */	          {send_termination_ack,
	                                                PPP_REQUEST_SENT_STATE},
	/* TERMINATE_ACK */               {set_ppp_state,PPP_ACK_SENT_STATE},
	/* UNKNOWN_CODE	*/                {send_code_reject,PPP_ACK_SENT_STATE},
	/* CODE_REJECT_PERMITTED */       {set_ppp_state,PPP_ACK_SENT_STATE},
	/* PROTOCOL_REJECT */             {set_ppp_state,PPP_ACK_SENT_STATE},
	/* CODE_REJECT_CATASTROPHIC */	  {this_layer_finished,
	                                                PPP_STOPPED_STATE},
	/* ECHO_REQUEST */                {set_ppp_state,PPP_ACK_SENT_STATE},
	/* ECHO_REPLY */                  {set_ppp_state,PPP_ACK_SENT_STATE},
	/* DISCARD_REQUEST */             {set_ppp_state,PPP_ACK_SENT_STATE},
	/* PPP_ECHO_RESPONSE_TIMEOUT */   {null_state,ILLEGAL_PPP_STATE},
	/* PPP_ECHO_RESPONSE_FAILURE */   {null_state,ILLEGAL_PPP_STATE}
	},
	{
	/* ----------------------------------------------------------------- */
	/* OPENED state: 9                                                   */
	/* ----------------------------------------------------------------- */
	/* UP */                          {null_state,ILLEGAL_PPP_STATE},
	/* DOWN */                        {this_layer_down,PPP_STARTING_STATE},
	/* OPEN */                        {set_ppp_state,PPP_OPENED_STATE},
	/* CLOSE */                       {this_layer_down,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   initialize_restart_counter,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   send_termination_request,
	                                                 PPP_CLOSING_STATE},
	/* TIMEOUT_WITH_COUNTER_GREATER */{null_state,ILLEGAL_PPP_STATE},
	/* TIMEOUT_WITH_COUNTER_EXPIRED	*/{null_state,ILLEGAL_PPP_STATE},
	/* RX */
	/* CONFIGURE_REQUEST_GOOD */      {this_layer_down,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_request,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_ack,
	                                                 PPP_ACK_SENT_STATE},
	/* CONFIGURE_REQUEST_BAD */       {this_layer_down,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_request,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_nak,
	                                                PPP_REQUEST_SENT_STATE},
	/* CONFIGURE_REQUEST_BAD_OPTION */{this_layer_down,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_request,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_reject,
	                                                PPP_REQUEST_SENT_STATE},
	/* CONFIGURE_ACK */               {this_layer_down,
	                                                NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_request,
	                                                PPP_REQUEST_SENT_STATE},
	/* CONFIGURE_NAK */               {this_layer_down,
	                                                NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_request,
	                                                PPP_REQUEST_SENT_STATE},
	/* CONFIGURE_REJECT */            {this_layer_down,
	                                                NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_request,
	                                                PPP_REQUEST_SENT_STATE},
	/* TERMINATE_REQUEST */           {this_layer_down,
	                                                NO_CHANGE_TO_PPP_STATE,
	                                   zero_restart_counter,
	                                                NO_CHANGE_TO_PPP_STATE,
	                                   send_termination_ack,
	                                                PPP_STOPPING_STATE},
	/* TERMINATE_ACK */               {this_layer_down,
	                                                NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_request,
	                                                PPP_REQUEST_SENT_STATE},
	/* UNKNOWN_CODE */                {send_code_reject,
	                                                PPP_OPENED_STATE},
	/* CODE_REJECT_PERMITTED */       {set_ppp_state,PPP_OPENED_STATE},
	/* PROTOCOL_REJECT */             {set_ppp_state,PPP_OPENED_STATE},
	/* CODE_REJECT_CATASTROPHIC */    {this_layer_down,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   initialize_restart_counter,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   send_termination_request,
	                                                 PPP_STOPPING_STATE},
	/* ECHO_REQUEST */                {send_echo_reply,PPP_OPENED_STATE},			
	/* ECHO_REPLY */                  {set_ppp_state,PPP_OPENED_STATE},
	/* DISCARD_REQUEST */             {set_ppp_state,PPP_OPENED_STATE},
	/* PPP_ECHO_RESPONSE_TIMEOUT */	  {send_echo_request,PPP_OPENED_STATE},
	/* PPP_ECHO_RESPONSE_FAILURE */   {this_layer_down,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   initialize_restart_counter,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   send_termination_request,
	                                                 PPP_STOPPING_STATE}
	}
    };

/*******************************************************************************
* execute_ppp_state_machine -
*/
void execute_ppp_state_machine
    (
    PFW_PLUGIN_OBJ_STATE * pluginState,
    PPP_EVENT ppp_event,
    M_BLK_ID pMblk
    )
    {
    PPP_CONTROL_PROTOCOL_STATE_DATA *pStateData = 
	    (PPP_CONTROL_PROTOCOL_STATE_DATA *)pluginState->stackData;
    PPP_STATE original_state;

    if (pStateData != NULL)
	original_state = pStateData->state;
    else
	return;

    if (state_machine_table[original_state][ppp_event].end_state == 
	ILLEGAL_PPP_STATE)
	{
	printf("PPP: %s: Illegal transition; state %d, Event %d, stack 0x%x\n",
		pluginState->pluginObj->name, original_state,
		(USHORT) ppp_event,(UINT32)pluginState->stackObj);

	if (pMblk != NULL)
	    netMblkClChainFree (pMblk);
	return;
	}

    if (state_machine_table[original_state][ppp_event].fptr_state_function != 
	NULL)
	{

	(*state_machine_table[original_state][ppp_event].fptr_state_function)
	    (pluginState, pMblk,
		state_machine_table[original_state][ppp_event].end_state);

	if ((state_machine_table[original_state][ppp_event].end_state != 
		NO_CHANGE_TO_PPP_STATE) &&
	    (state_machine_table[original_state][ppp_event].fptr_state_function
		!= set_ppp_state))
	    {
	    set_ppp_state (pluginState,NULL,
		    state_machine_table[original_state][ppp_event].end_state);
	    }
	}

    if (state_machine_table[original_state][ppp_event].fptr_state_function_1 != 
	NULL)
	{

	(*state_machine_table[original_state][ppp_event].fptr_state_function_1)
		(pluginState,pMblk,
		state_machine_table[original_state][ppp_event].end_state_1);

	if ((state_machine_table[original_state][ppp_event].end_state_1 != 
		NO_CHANGE_TO_PPP_STATE) &&
	   (state_machine_table[original_state][ppp_event].fptr_state_function_1
		!= set_ppp_state))
	    {
	    set_ppp_state (pluginState,NULL,
		    state_machine_table[original_state][ppp_event].end_state_1);
	    }
	}

    if (state_machine_table[original_state][ppp_event].fptr_state_function_2 != 
	NULL)
	{

	(*state_machine_table[original_state][ppp_event].fptr_state_function_2)
		(pluginState,pMblk,
		state_machine_table[original_state][ppp_event].end_state_2);

	if ((state_machine_table[original_state][ppp_event].end_state_2 != 
		NO_CHANGE_TO_PPP_STATE) &&
	   (state_machine_table[original_state][ppp_event].fptr_state_function_2
		!= set_ppp_state))
	    {
	    set_ppp_state (pluginState,NULL,
		    state_machine_table[original_state][ppp_event].end_state_2);
	    }
	}
    pStateData->old_state = (BYTE_ENUM (PPP_STATE)) original_state;

    }
/*******************************************************************************
* set_ppp_state -
*/
void set_ppp_state
    (
    PFW_PLUGIN_OBJ_STATE * pluginState,
    M_BLK_ID  pMblk,
    PPP_STATE end_state