pppstate.c

这是全套的PPP协议的源码

/* pppstate.c - state machine table */

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

#include "copyright_wrs.h"

/*
modification history
--------------------
01f,28may02,rvr fixed build warnings 
01e,29sep00,sj  merging with TOR2_0-WINDNET_PPP-CUM_PATCH_2
01d,09aug00,adb  support opening connections in passive mode
01c,15mar00,sj  initiate active termination of link on
                 PPP_ECHO_RESPONSE_FAILURE in OPENED state
01b,09nov99,sj  in stopped state RCR- causes change to state 6
01a,04oct99,sj 	created
*/

#include "vxWorks.h"
#include "stdio.h"
#include "private/ppp/pppstate.h"

/*
*$Log:: /Rtrware/devdrvrs/ppp/pppstat $
 * 
 * 9     3/12/99 11:27a Nishit
 * Bunch of small changes - mostly in MP
 * related code
 * 
 * 8     11/17/98 8:43a Nishit
 * this_layer_finished calls the control
 * routine of the serial driver with
 * lsl_port_number as against PPP's
 * version of the port number (which is
 * independent of the LAN ports)
 * 
 * 7     10/01/98 11:43a Alex
 * Updated the PPP source code to conform
 * to a single build. 
 * 
 * 6     4/30/98 3:03p Alex
 * Ppp v4.2.0 check in
 * 
 * 1     4/24/98 12:10a Release Engineer
 * code cleanup, code style changes,
 * linted, system level test
 * PPP v4.2.0
*/

/* locals and forwards */

LOCAL void this_layer_start(PFW_PLUGIN_OBJ_STATE * pluginObjState,
				    M_BLK_ID pMblk, PPP_STATE end_state);
LOCAL void this_layer_finished(PFW_PLUGIN_OBJ_STATE * pluginObjState,
				    M_BLK_ID pMblk, PPP_STATE end_state);
LOCAL void this_layer_up(PFW_PLUGIN_OBJ_STATE * pluginObjState,
				    M_BLK_ID pMblk, PPP_STATE end_state);
LOCAL void this_layer_down (PFW_PLUGIN_OBJ_STATE * pluginObjState,
				    M_BLK_ID pMblk, PPP_STATE end_state);
LOCAL void initialize_restart_counter(PFW_PLUGIN_OBJ_STATE * pluginObjState,
				    M_BLK_ID pMblk, PPP_STATE end_state);
LOCAL void zero_restart_counter(PFW_PLUGIN_OBJ_STATE * pluginObjState,
				    M_BLK_ID pMblk, PPP_STATE end_state);
LOCAL void send_configuration_request(PFW_PLUGIN_OBJ_STATE * pluginObjState,
				M_BLK_ID pMblk, PPP_STATE end_state);
LOCAL void send_configuration_ack(PFW_PLUGIN_OBJ_STATE * pluginObjState,
				M_BLK_ID pMblk, PPP_STATE end_state);
LOCAL void send_configuration_nak(PFW_PLUGIN_OBJ_STATE * pluginObjState,
				M_BLK_ID pMblk, PPP_STATE end_state);
LOCAL void send_configuration_reject(PFW_PLUGIN_OBJ_STATE * pluginObjState,
				M_BLK_ID pMblk, PPP_STATE end_state);
LOCAL void send_termination_request(PFW_PLUGIN_OBJ_STATE * pluginObjState,
				M_BLK_ID pMblk, PPP_STATE end_state);
LOCAL void send_termination_ack(PFW_PLUGIN_OBJ_STATE * pluginObjState,
				M_BLK_ID pMblk, PPP_STATE end_state);
LOCAL void send_code_reject(PFW_PLUGIN_OBJ_STATE * pluginObjState,
				M_BLK_ID pMblk, PPP_STATE end_state);
LOCAL void send_echo_reply(PFW_PLUGIN_OBJ_STATE * pluginObjState,
				M_BLK_ID pMblk, PPP_STATE end_state);
LOCAL void send_echo_request(PFW_PLUGIN_OBJ_STATE * pluginObjState,
				M_BLK_ID pMblk, PPP_STATE end_state);

/* globals */

PPP_STATE_MACHINE_TABLE
    state_machine_table[NUMBER_OF_PPP_STATES][NUMBER_OF_PPP_EVENTS] = 
    {
	{
	/* ----------------------------------------------------------------- */
	/* INITIAL state: 0                                                  */
	/* ----------------------------------------------------------------- */
	/* UP */                          {set_ppp_state,PPP_CLOSED_STATE},
	/* DOWN */                        {null_state,ILLEGAL_PPP_STATE},
	/* OPEN */                        {this_layer_start,PPP_STARTING_STATE},
	/* CLOSE */                       {set_ppp_state,PPP_INITIAL_STATE},
	/* TIMEOUT_WITH_COUNTER_GREATER */{null_state,ILLEGAL_PPP_STATE},
	/* TIMEOUT_WITH_COUNTER_EXPIRED */{null_state,ILLEGAL_PPP_STATE},
	/* RX */	
	/* CONFIGURE_REQUEST_GOOD */      {null_state,ILLEGAL_PPP_STATE},
	/* CONFIGURE_REQUEST_BAD */       {null_state,ILLEGAL_PPP_STATE},
	/* CONFIGURE_REQUEST_BAD_OPTION */{null_state,ILLEGAL_PPP_STATE},
	/* CONFIGURE_ACK */               {null_state,ILLEGAL_PPP_STATE},
	/* CONFIGURE_NAK */               {null_state,ILLEGAL_PPP_STATE},
	/* CONFIGURE_REJECT */            {null_state,ILLEGAL_PPP_STATE},
	/* TERMINATE_REQUEST */           {null_state,ILLEGAL_PPP_STATE},
	/* TERMINATE_ACK */               {null_state,ILLEGAL_PPP_STATE},
	/* UNKNOWN_CODE */                {null_state,ILLEGAL_PPP_STATE},
	/* CODE_REJECT_PERMITTED */       {null_state,ILLEGAL_PPP_STATE},
	/* PROTOCOL_REJECT */             {null_state,ILLEGAL_PPP_STATE},
	/* CODE_REJECT_CATASTROPHIC */    {null_state,ILLEGAL_PPP_STATE},
	/* ECHO_REQUEST */                {null_state,ILLEGAL_PPP_STATE},
	/* ECHO_REPLY */                  {null_state,ILLEGAL_PPP_STATE},
	/* DISCARD_REQUEST */             {null_state,ILLEGAL_PPP_STATE},
	/* PPP_ECHO_RESPONSE_TIMEOUT */   {null_state,ILLEGAL_PPP_STATE},
	/* PPP_ECHO_RESPONSE_FAILURE */   {null_state,ILLEGAL_PPP_STATE}
	},
	{
	/* ----------------------------------------------------------------- */
	/* STARTING state: 1                                                 */
	/* ----------------------------------------------------------------- */
	/* UP */                          {initialize_restart_counter,
	                                                NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_request,
	                                                PPP_REQUEST_SENT_STATE},
	/* DOWN */                        {null_state,ILLEGAL_PPP_STATE},
	/* OPEN */                        {set_ppp_state,PPP_STARTING_STATE},
	/* CLOSE */                       {set_ppp_state,PPP_INITIAL_STATE},

	/* TIMEOUT_WITH_COUNTER_GREATER */{null_state,ILLEGAL_PPP_STATE},
	/* TIMEOUT_WITH_COUNTER_EXPIRED */{null_state,ILLEGAL_PPP_STATE},
	/* RX */		
	/* CONFIGURE_REQUEST_GOOD */      {null_state,ILLEGAL_PPP_STATE},
	/* CONFIGURE_REQUEST_BAD  */      {null_state,ILLEGAL_PPP_STATE},
	/* CONFIGURE_REQUEST_BAD_OPTION */{null_state,ILLEGAL_PPP_STATE},
	/* CONFIGURE_ACK */               {null_state,ILLEGAL_PPP_STATE},
	/* CONFIGURE_NAK */               {null_state,ILLEGAL_PPP_STATE},
	/* CONFIGURE_REJECT */            {null_state,ILLEGAL_PPP_STATE},
	/* TERMINATE_REQUEST */           {null_state,ILLEGAL_PPP_STATE},
	/* TERMINATE_ACK */               {null_state,ILLEGAL_PPP_STATE},
	/* UNKNOWN_CODE  */               {null_state,ILLEGAL_PPP_STATE},
	/* CODE_REJECT_PERMITTED */       {null_state,ILLEGAL_PPP_STATE},
	/* PROTOCOL_REJECT */             {null_state,ILLEGAL_PPP_STATE},
	/* CODE_REJECT_CATASTROPHIC */    {null_state,ILLEGAL_PPP_STATE},
	/* ECHO_REQUEST */                {null_state,ILLEGAL_PPP_STATE},
	/* ECHO_REPLY */                  {null_state,ILLEGAL_PPP_STATE},
	/* DISCARD_REQUEST */             {null_state,ILLEGAL_PPP_STATE},
	/* PPP_ECHO_RESPONSE_TIMEOUT */   {null_state,ILLEGAL_PPP_STATE},
	/* PPP_ECHO_RESPONSE_FAILURE */   {null_state,ILLEGAL_PPP_STATE}
	},
	{
	/* ----------------------------------------------------------------- */
	/* CLOSED state: 2                                                   */
	/* ----------------------------------------------------------------- */
	/* UP */                          {null_state,ILLEGAL_PPP_STATE}, 
	/* DOWN	*/                        {set_ppp_state,PPP_INITIAL_STATE},
	/* OPEN */                        {initialize_restart_counter,
	                                                NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_request,
	                                                PPP_REQUEST_SENT_STATE},
	/* CLOSE */                        {set_ppp_state,PPP_CLOSED_STATE},
	/* TIMEOUT_WITH_COUNTER_GREATER	*/ {null_state,ILLEGAL_PPP_STATE},
	/* TIMEOUT_WITH_COUNTER_EXPIRED */ {null_state,ILLEGAL_PPP_STATE},
	/* RX */
	/* CONFIGURE_REQUEST_GOOD */   {send_termination_ack,PPP_CLOSED_STATE},
	/* CONFIGURE_REQUEST_BAD */    {send_termination_ack,PPP_CLOSED_STATE},
	/* CONFIGURE_REQUEST_BAD_OPTION */ {send_termination_ack,
	                                                     PPP_CLOSED_STATE},
	/* CONFIGURE_ACK */            {send_termination_ack,PPP_CLOSED_STATE},
	/* CONFIGURE_NAK */            {send_termination_ack,PPP_CLOSED_STATE},
	/* CONFIGURE_REJECT */         {send_termination_ack,PPP_CLOSED_STATE},
	/* TERMINATE_REQUEST */        {send_termination_ack,PPP_CLOSED_STATE},
	/* TERMINATE_ACK */            {set_ppp_state,PPP_CLOSED_STATE},
	/* UNKNOWN_CODE */             {send_code_reject,PPP_CLOSED_STATE},
	/* CODE_REJECT_PERMITTED */    {set_ppp_state,PPP_CLOSED_STATE},
	/* PROTOCOL_REJECT */          {set_ppp_state,PPP_CLOSED_STATE},
	/* CODE_REJECT_CATASTROPHIC */ {this_layer_finished,PPP_CLOSED_STATE},
	/* ECHO_REQUEST */             {set_ppp_state,PPP_CLOSED_STATE},
	/* ECHO_REPLY */               {set_ppp_state,PPP_CLOSED_STATE},
	/* DISCARD_REQUEST */          {set_ppp_state,PPP_CLOSED_STATE},
	/* PPP_ECHO_RESPONSE_TIMEOUT */{null_state,ILLEGAL_PPP_STATE},
	/* PPP_ECHO_RESPONSE_FAILURE */{null_state,ILLEGAL_PPP_STATE}
	},
	{
	/* ----------------------------------------------------------------- */
	/* STOPPED state: 3                                                  */
	/* ----------------------------------------------------------------- */
	/* UP */                          {null_state,ILLEGAL_PPP_STATE},
	/* DOWN */                        {this_layer_start,PPP_STARTING_STATE},
	/* OPEN */                        {set_ppp_state,PPP_STOPPED_STATE},
	/* CLOSE */                       {set_ppp_state,PPP_CLOSED_STATE},
	/* TIMEOUT_WITH_COUNTER_GREATER	*/{null_state,ILLEGAL_PPP_STATE},
	/* TIMEOUT_WITH_COUNTER_EXPIRED	*/{null_state,ILLEGAL_PPP_STATE},
	/* RX */
	/* CONFIGURE_REQUEST_GOOD */      {initialize_restart_counter,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_request,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_ack,
	                                                 PPP_ACK_SENT_STATE},
	/* CONFIGURE_REQUEST_BAD */       {initialize_restart_counter,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_request,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_nak,
						        PPP_REQUEST_SENT_STATE},
	#if 0
	/* CONFIGURE_REQUEST_BAD_OPTION */{initialize_restart_counter,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_request,
	                                                 NO_CHANGE_TO_PPP_STATE,
	                                   send_configuration_nak,
	                                                 PPP_ACK_SENT_STATE},
	#endif
	/* CONFIGURE_REQUEST_BAD_OPTION */{send_configuration_reject,
	                                                 PPP_STOPPED_STATE},
	/* CONFIGURE_ACK */               {send_termination_ack,
	                                                 PPP_STOPPED_STATE},
	/* CONFIGURE_NAK */               {send_termination_ack,
	                                                 PPP_STOPPED_STATE},
	/* CONFIGURE_REJECT */            {send_termination_ack,
	                                                 PPP_STOPPED_STATE},
	/* TERMINATE_REQUEST */           {send_termination_ack,
	                                                 PPP_STOPPED_STATE},
	/* TERMINATE_ACK */               {set_ppp_state,PPP_STOPPED_STATE},
	/* UNKNOWN_CODE	*/                {send_code_reject,PPP_STOPPED_STATE},
	/* CODE_REJECT_PERMITTED */       {set_ppp_state,PPP_STOPPED_STATE},
	/* PROTOCOL_REJECT */             {set_ppp_state,PPP_STOPPED_STATE},
	/* CODE_REJECT_CATASTROPHIC */    {this_layer_finished,
                                                         PPP_STOPPED_STATE},
	/* ECHO_REQUEST */                {set_ppp_state,PPP_STOPPED_STATE},
	/* ECHO_REPLY */                  {set_ppp_state,PPP_STOPPED_STATE},
	/* DISCARD_REQUEST */             {set_ppp_state,PPP_STOPPED_STATE},
	/* PPP_ECHO_RESPONSE_TIMEOUT */   {null_state,ILLEGAL_PPP_STATE},
	/* PPP_ECHO_RESPONSE_FAILURE */   {null_state,ILLEGAL_PPP_STATE}
	},
	{
	/* ----------------------------------------------------------------- */
	/* CLOSING state: 4                                                  */
	/* ----------------------------------------------------------------- */
	/* UP */                          {null_state,ILLEGAL_PPP_STATE},
	/* DOWN	*/                        {set_ppp_state,PPP_INITIAL_STATE},
	/* OPEN */                        {set_ppp_state,PPP_STOPPING_STATE},
	/* CLOSE */                       {set_ppp_state,PPP_CLOSING_STATE},
	/* TIMEOUT_WITH_COUNTER_GREATER */{send_termination_request,
	                                                 PPP_CLOSING_STATE},
	/* TIMEOUT_WITH_COUNTER_EXPIRED*/{this_layer_finished,PPP_CLOSED_STATE},

	/* RX */
	/* CONFIGURE_REQUEST_GOOD */      {set_ppp_state,PPP_CLOSING_STATE},
	/* CONFIGURE_REQUEST_BAD */       {set_ppp_state,PPP_CLOSING_STATE},
	/* CONFIGURE_REQUEST_BAD_OPTION */{set_ppp_state,PPP_CLOSING_STATE},
	/* CONFIGURE_ACK */               {set_ppp_state,PPP_CLOSING_STATE},
	/* CONFIGURE_NAK */               {set_ppp_state,PPP_CLOSING_STATE},
	/* CONFIGURE_REJECT */            {set_ppp_state,PPP_CLOSING_STATE},
	/* TERMINATE_REQUEST */	          {send_termination_ack,
	                                                 PPP_CLOSING_STATE},
	/* TERMINATE_ACK */               {this_layer_finished,
	                                                 PPP_CLOSED_STATE},
	/* UNKNOWN_CODE */                {send_code_reject,PPP_CLOSING_STATE},
	/* CODE_REJECT_PERMITTED */       {set_ppp_state,PPP_CLOSING_STATE},
	/* PROTOCOL_REJECT */             {set_ppp_state,PPP_CLOSING_STATE},
	/* CODE_REJECT_CATASTROPHIC */    {this_layer_finished,
	                                                 PPP_CLOSED_STATE},
	/* ECHO_REQUEST */                {set_ppp_state,PPP_CLOSING_STATE},
	/* ECHO_REPLY */                  {set_ppp_state,PPP_CLOSING_STATE},
	/* DISCARD_REQUEST */             {set_ppp_state,PPP_CLOSING_STATE},
	/* PPP_ECHO_RESPONSE_TIMEOUT */   {null_state,ILLEGAL_PPP_STATE},
	/* PPP_ECHO_RESPONSE_FAILURE */   {null_state,ILLEGAL_PPP_STATE}
	},
	{
	/* ----------------------------------------------------------------- */
	/* STOPPING state: 5                                                 */
	/* ----------------------------------------------------------------- */
	/* UP */                          {null_state,ILLEGAL_PPP_STATE},
	/* DOWN */                        {set_ppp_state,PPP_STARTING_STATE},
	/* OPEN */                        {set_ppp_state,PPP_STOPPING_STATE},
	/* CLOSE */                       {set_ppp_state,PPP_CLOSING_STATE},
	/* */
	/* TIMEOUT_WITH_COUNTER_GREATER */{send_termination_request,
                                                         PPP_STOPPING_STATE},
	/* TIMEOUT_WITH_COUNTER_EXPIRED */{this_layer_finished,
	                                                 PPP_STOPPED_STATE},
	/* RX */
	/* CONFIGURE_REQUEST_GOOD */      {set_ppp_state,PPP_STOPPING_STATE},
	/* CONFIGURE_REQUEST_BAD */       {set_ppp_state,PPP_STOPPING_STATE},
	/* CONFIGURE_REQUEST_BAD_OPTION */{set_ppp_state,PPP_STOPPING_STATE},
	/* CONFIGURE_ACK */               {set_ppp_state,PPP_STOPPING_STATE},
	/* CONFIGURE_NAK */               {set_ppp_state,PPP_STOPPING_STATE},
	/* CONFIGURE_REJECT */            {set_ppp_state,PPP_STOPPING_STATE},
	/* TERMINATE_REQUEST */           {send_termination_ack,
	                                                 PPP_STOPPING_STATE},
	/* TERMINATE_ACK */               {this_layer_finished,
                                                         PPP_STOPPED_STATE},
	/* UNKNOWN_CODE */                {send_code_reject,PPP_STOPPING_STATE},
	/* CODE_REJECT_PERMITTED */       {set_ppp_state,PPP_STOPPING_STATE},
	/* PROTOCOL_REJECT */             {set_ppp_state,PPP_STOPPING_STATE},
	/* CODE_REJECT_CATASTROPHIC */    {this_layer_finished,
	                                                 PPP_STOPPED_STATE},
	/* ECHO_REQUEST	*/                {set_ppp_state,PPP_STOPPING_STATE},
	/* ECHO_REPLY */                  {set_ppp_state,PPP_STOPPING_STATE},
	/* DISCARD_REQUEST */             {set_ppp_state,PPP_STOPPING_STATE},
	/* PPP_ECHO_RESPONSE_TIMEOUT */   {null_state,ILLEGAL_PPP_STATE},
	/* PPP_ECHO_RESPONSE_FAILURE */   {null_state,ILLEGAL_PPP_STATE}
	},
	{
	/* ----------------------------------------------------------------- */
	/* REQUEST_SENT state: 6                                             */
	/* ----------------------------------------------------------------- */