net_appl.c

MIPS下的boottloader yamon 的源代码

/************************************************************************
 *
 *      net.c
 *
 *      The 'NET' module implements the common utility functions, neede
 *      by the NET-modules.
 *
 *
 * ######################################################################
 *
 * Copyright (c) 1999-2000 MIPS Technologies, Inc. All rights reserved. 
 * 
 * Unpublished rights reserved under the Copyright Laws of the United States of 
 * America. 
 * 
 * This document contains information that is proprietary to MIPS Technologies, 
 * Inc. ("MIPS Technologies"). Any copying, modifying or use of this information 
 * (in whole or in part) which is not expressly permitted in writing by MIPS 
 * Technologies or a contractually-authorized third party is strictly 
 * prohibited. At a minimum, this information is protected under unfair 
 * competition laws and the expression of the information contained herein is 
 * protected under federal copyright laws. Violations thereof may result in 
 * criminal penalties and fines. 
 * MIPS Technologies or any contractually-authorized third party reserves the 
 * right to change the information contained in this document to improve 
 * function, design or otherwise. MIPS Technologies does not assume any 
 * liability arising out of the application or use of this information. Any 
 * license under patent rights or any other intellectual property rights owned 
 * by MIPS Technologies or third parties shall be conveyed by MIPS Technologies 
 * or any contractually-authorized third party in a separate license agreement 
 * between the parties. 
 * The information contained in this document constitutes one or more of the 
 * following: commercial computer software, commercial computer software 
 * documentation or other commercial items. If the user of this information, or 
 * any related documentation of any kind, including related technical data or 
 * manuals, is an agency, department, or other entity of the United States 
 * government ("Government"), the use, duplication, reproduction, release, 
 * modification, disclosure, or transfer of this information, or any related 
 * documentation of any kind, is restricted in accordance with Federal 
 * Acquisition Regulation 12.212 for civilian agencies and Defense Federal 
 * Acquisition Regulation Supplement 227.7202 for military agencies. The use of 
 * this information by the Government is further restricted in accordance with 
 * the terms of the license agreement(s) and/or applicable contract terms and 
 * conditions covering this information from MIPS Technologies or any 
 * contractually-authorized third party. 
 *
 ************************************************************************/


/************************************************************************
 *      Include files
 ************************************************************************/

#include <string.h>
#include <stdio.h>
#include <sysdefs.h>
#include <syserror.h>
#include <sysdev.h>
#include <syscon_api.h>
#include <sys_api.h>
#include <shell_api.h>

/* net stuff */
#include <net_api.h>
#include "net.h"
#include "net_mac.h"
#include "net_arp.h"
#include "net_ip.h"
#include "net_icmp.h"
#include "net_tftpc.h"


/************************************************************************
 *      Definitions
 ************************************************************************/



/************************************************************************
 *      Public variables
 ************************************************************************/


/************************************************************************
 *      Static variables
 ************************************************************************/

static bool       appl_reply_received ;
static UINT16     appl_reply_sequence ;
static UINT16     appl_reply_length ;
static UINT32     appl_reply_ip ;
static t_mac_addr appl_reply_mac_adr ;

static UINT16     appl_sequence ;
static UINT16     appl_length ;

/************************************************************************
 *      Static function prototypes
 ************************************************************************/

/************************************************************************
 *
 *                          NET_APPL_echo_reply
 *  Description :
 *  -------------
 *  Initialize the net applications
 *
 *
 *  Parameters :
 *  ------------
 *  -
 *
 *
 *  Return values :
 *  ---------------
 *  'OK'(=0) 
 *
 ************************************************************************/
static
UINT32 NET_APPL_echo_reply( UINT32     src_ip_adr,  /* BE-format */
                            t_mac_addr *src_mac_adr,/* MAC */
                            UINT16     sequence,    /* CPU-format */
                            UINT16     usr_length ) ;

/************************************************************************
 *      Implementation : Public functions
 ************************************************************************/

/************************************************************************
 *
 *                          NET_APPL_init
 *  Description :
 *  -------------
 *  Initialize the net applications
 *
 *
 *  Parameters :
 *  ------------
 *  -
 *
 *
 *  Return values :
 *  ---------------
 *  'OK'(=0) 
 *
 ************************************************************************/
UINT32 NET_APPL_init( void )
{
    UINT32          rcode ;

    /* register ECHO-REPLY handler */
    IF_ERROR( (rcode),
               (NET_ICMP_ECHO_open( NET_APPL_echo_reply )) )


}


/************************************************************************
 *
 *                          NET_ping
 *  Description :
 *  -------------
 *  Poll the net modules
 *
 *
 *  Parameters :
 *  ------------
 *  -
 *
 *
 *  Return values :
 *  ---------------
 *  'OK'(=0) 
 *
 ************************************************************************/
UINT32
NET_ping( UINT32 ipadr, UINT32 data_size )
{
    UINT32 dot_count = 0;
    UINT32 compl, rcode, time_start, time_now ;
    UINT32 retry = 3 ;

#ifdef NET_DEBUG
    printf("net_ping\n") ;
#endif

    /* clear error context */
    net_last_error  = OK ;
    net_diag_msg[0] = 0 ;

    /* check data_size */
    if ( data_size > PING_MAX_DATAGRAM_SIZE )
    {
        data_size = PING_DEFAULT_DATAGRAM_SIZE ;
    }

    /* Set context before request is called */
    appl_reply_received = FALSE ;
    appl_sequence = data_size ;
    appl_length   = data_size ;

    /* Request ICMP to 'send' */
    compl = NET_ICMP_ECHO_send( ipadr, NULL, appl_sequence, appl_length ) ;
    if ( (compl != OK) &&
         (compl != ERROR_NET_ARP_MAC_NOT_RESOLUTED) )
    {
        return( compl ) ;
    }

    /* Get time right now */
    IF_ERROR( (rcode),
               (NET_gettime( &time_start)) )

    while (1)
    {
        /* Poll for any reply */
        NET_poll() ;

        if ( appl_reply_received )
        {
            if ( ( appl_sequence == appl_reply_sequence ) &&
                 ( appl_length   == appl_reply_length   ) &&
                 ( ipadr         == appl_reply_ip       ) )
            {
                if( dot_count )
                {
                    printf("\n") ;
                }
                ipadr = BE32_TO_CPU(ipadr) ;
                printf("%d bytes ICMP-ECHO-REPLY user data received from %d.%d.%d.%d\n",
                                                         appl_length,
                                                        (ipadr>>24)&0xff,
                                                        (ipadr>>16)&0xff,
                                                        (ipadr>> 8)&0xff,
                                                        (ipadr    )&0xff ) ;

                rcode = OK ;
                break ;
            }
        }
 
        /* Get time right now */
        IF_ERROR( (rcode),
                   (NET_gettime( &time_now)) )

        if ((time_now - time_start) >= 1)
        {
            if(shell_print_dot( &dot_count ))
            {
              rcode = SHELL_ERROR_CONTROL_C_DETECTED ;
              break ;
            }

            /* Do we have any retries left */
            if (!retry)
            {
                rcode = compl ;
                if ( compl == ERROR_NET_ARP_MAC_NOT_RESOLUTED )
                {
                    net_last_error = ERROR_NET_ARP_TIME_OUT ;
                    rcode = net_last_error ;
                }
                if ( compl == OK )
                {
                    net_last_error = ERROR_NET_PING_TIME_OUT ;
                    rcode = ERROR_NET_PING_TIME_OUT ;
                }
                if( dot_count )
                {
                    printf("\n") ;
                }
                break ;
            }

            /* retransmit */
            time_start = time_now ;

            /* Request ICMP to 'send' */
            compl = NET_ICMP_ECHO_send( ipadr, NULL, appl_sequence, appl_length ) ;
            retry-- ;
        }

    }
    return( rcode ) ;
}


/************************************************************************
 *
 *                          TEST_ping
 *  Description :
 *  -------------
 *  Special version of ping for production test:
 *      non verbose
 *      without retries
 *      with variable timeout in milliseconds
 *
 *  The lack of retries makes it important to avoid false timeouts.
 *  The time algorithm depends on the fact, that the timeout value
 *   plus the maximum possible timer value will not wrap.
 *  Timeout is measured in milliseconds.
 *  The raw timer wraps every 16777216 microsecs ~ 16777 millisec
 *
 *  Parameters :
 *  ------------
 *  -
 *
 *
 *  Return values :
 *  ---------------