protinit.c

基于东南大学开发的SEP3203的ARM7中的所有驱动

/*************************************************************************
*                                                                       
*    CopyrIght (c)  1993 - 2001 Accelerated Technology, Inc.            
*                                                                       
* PROPRIETARY RIGHTS of Accelerated Technology are involved in the      
* subject matter of this material.  All manufacturing, reproduction,    
* use, and sales rights pertaining to this subject matter are governed  
* by the license agreement.  The recipient of this software implicitly  
* accepts the terms of the license.                                     
*                                                                       
*************************************************************************/

/* Portions of this program were written by: */
/*************************************************************************
*                                                                         
*      part of:                                                           
*      TCP/UDP/ICMP/IP Network kernel for NCSA Telnet                     
*      by Tim Krauskopf                                                   
*                                                                         
*      National Center for Supercomputing Applications                    
*      152 Computing Applications Building                                
*      605 E. Springfield Ave.                                            
*      Champaign, IL  61820                                               
**************************************************************************
*   'protinit' initializes packets to make them ready for transmission.
*   For many purposes, pre-initialized packets are created for use by the
*   protocol routines, especially to save time creating packets for
*   transmit.
*
*
*   As this is a convenient place for it, this file contains many of the
*   data declarations for packets which are mostly static (pre-allocated).
*************************************************************************/

/*************************************************************************
*                                                                          
*   FILENAME                                          VERSION                        
*                                                                                  
*       protinit.c                                      4.4                             
*           
*   COMPONENT
*
*       IP Layer
*                                                                       
*   DESCRIPTION                                                              
*          
*       This file contains functions to initialize packets in preparation
*       for transmission.                                                                
*                                                                          
*   DATA STRUCTURES                                                          
*                                                                          
*       None
*                                                                          
*   FUNCTIONS                                                                
*                                                                          
*       PROT_Protocol_Init                                                      
*       PROT_TCP_Timer_Init                                                     
*       PROT_UDP_Init                                                           
*       PROT_TCP_Init                                                           
*       PROT_IPRaw_Init                                                         
*       PROT_Net_Init                                                           
*                                                                          
*   DEPENDENCIES                                                             
*                                                                          
*       nucleus.h
*       target.h
*       externs.h
*       net_extr.h
*       socketd.h
*       ip.h
*       netevent.h
*       nerrs.h
*       tcpdefs.h
*       tcp.h
*       dns.h
*       udp.h
*       ipraw.h
*       dhcp.h
*                                                                          
*************************************************************************/

#include "plus/nucleus.h"
#include "net/target.h"
#include "net/inc/externs.h"
#include "net/inc/net_extr.h"
#include "net/inc/socketd.h"
#include "net/inc/ip.h"
#include "net/inc/netevent.h"
#include "net/inc/nerrs.h"
#include "net/inc/tcpdefs.h"
#include "net/inc/tcp.h"
#include "net/inc/dns.h"
#include "net/inc/udp.h"
#include "net/inc/ipraw.h"
#include "net/inc/dhcp.h"

#if (INCLUDE_SNMP == NU_TRUE)
#include SNMP_GLUE
#endif

extern int TCP_Backoff[];

/* Local Prototypes */
static  VOID PROT_TCP_Init (VOID);
static  STATUS PROT_Protocol_Init(VOID);
static  VOID PROT_TCP_Timer_Init (VOID);

#if (INCLUDE_UDP == NU_TRUE)
static  VOID PROT_UDP_Init (VOID);
#endif

#if INCLUDE_IP_RAW
static  VOID PROT_IPRaw_Init(VOID);
#endif

/* Import the global function pointer that lets NET pass
   packets to SPAN. */
extern UINT32 (*span_process_packet) (UINT8 *, UINT32, UINT32);

/* Import PPPoE input function pointer for initialization. */
extern VOID   (*ppe_process_packet)(UINT16);

#if (INCLUDE_TCP == NU_TRUE)
/* Import the TCP acktimeout variable so that TCP init can set it. */
extern UINT32 TCP_ACK_Timeout;
#endif

/*************************************************************************
*                                                                       
*   FUNCTION                                                              
*                                                                       
*       PROT_Tcp_Timer_Init                                              
*                                                                       
*   DESCRIPTION                                                           
*                                                                       
*       Initialize the head and tail pointers of both the EQ_Event_List     
*       and the EQ_Event_Freelist to 0.                                     
*                                                                       
*   INPUTS                                                                
*                                                                       
*       None
*                                                                       
*   OUTPUTS                                                               
*                                                                       
*       None 
*                                                                       
*************************************************************************/
static VOID PROT_TCP_Timer_Init(VOID)
{
    /* Initialize the head and tail pointers to 0 */
    EQ_Event_Freelist.flink = EQ_Event_Freelist.blink = NU_NULL;
    EQ_Event_List.flink = EQ_Event_List.blink = NU_NULL;

} /* end PROT_Tcp_Timer_Init() */

/************************************************************************
*                                                                       
*   FUNCTION                                                             
*                                                                       
*       PROT_Protocol_Init                                               
*                                                                       
*   DESCRIPTION                                                          
*                                                                       
*       Calls all the other packet initialization keep this order as some
*       packet inits require lower layers already be initialized.        
*                                                                       
*   INPUTS                                                               
*                                                                       
*       None                                                            
*                                                                       
*   OUTPUTS                                                              
*                                                                       
*       NU_SUCCESS                                                       
*       NU_MEM_ALLOC                                                     
*                                                                       
*************************************************************************/
static STATUS PROT_Protocol_Init(VOID)
{
    INT         i;

    for (i = 0; i < NSOCKETS; i++)
        SCK_Sockets[i] = NU_NULL;

    /* Zero the SPAN function pointer. When, and if, SPAN is
       initialized it will setup this pointer to the correct
       function. */
    span_process_packet = NU_NULL;

    /* Zero the PPPoE input function pointer. This will be initialized
       within the PPPoE library if it is included. */
	ppe_process_packet = NU_NULL;

    SR_SNMP_Initialize();