net_appl.c

MIPS下的boottloader yamon 的源代码

 *  'OK'(=0) 
 *
 ************************************************************************/
UINT32
TEST_ping( UINT32 ipadr, UINT32 data_size, UINT32 ping_ms_timeout)
{
    UINT32 rcode, latest, previous, mstimout ;

    /* 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' */
    NET_ICMP_ECHO_send( ipadr,
                        0,
                        appl_sequence,
                        appl_length );

    /* Get millisecond count right now */
    SYSCON_read( SYSCON_BOARD_GET_MILLISEC_ID,
                 &latest,
                 sizeof(latest) ) ;
    mstimout = latest + ping_ms_timeout ;  /* typically 1000 = one second */

    do
    {
        /* 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       ) )
            {
                rcode = OK ;
                break ;
            }
        }
 
        previous = latest;
        /* get millisecond count right now */
        rcode = SYSCON_read( SYSCON_BOARD_GET_MILLISEC_ID,
                             &latest,
                             sizeof(latest) ) ;
        if ( latest < previous )
        {
            mstimout -= previous;  /* may cause a few millisec extra delay */
        }
        if (latest > mstimout) 
        {
            rcode = ERROR_NET_PING_TIME_OUT ;
        }
    } while (rcode == OK);

    return( rcode ) ;
}



/************************************************************************
 *
 *                          NET_APPL_echo_reply
 *  Description :
 *  -------------
 *  Receive 'ECHO'-reply
 *
 *
 *  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 )
{
    int i ;
    UINT8 *p ;

#ifdef NET_DEBUG
    printf("NET_APPL_echo_reply\n") ;
    printf("src_ip_adr = %x\n", BE32_TO_CPU(src_ip_adr) ) ;
    printf("sequence   = %d\n", sequence ) ;
    printf("usr_length = %d\n", usr_length ) ;
    printf("src MAC = " ) ;
    p = (UINT8*) src_mac_adr ;
    for (i=0; i<6; i++)
    {
        printf(" %02x",*p++ ) ;
    }
    printf("\n" ) ;
#endif

    /* save reply context */
    if ( !appl_reply_received )
    {
        appl_reply_received = TRUE ;
        appl_reply_sequence = sequence ;
        appl_reply_length   = usr_length ;
        appl_reply_ip       = src_ip_adr ;
        memcpy( &appl_reply_mac_adr, src_mac_adr, SYS_MAC_ADDR_SIZE ) ;
    }

    return( OK ) ; 
}


UINT32
net_open( UINT32 ipadr, char *filename )
{
    UINT32 compl, state, cause, sp_hd ;

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

    compl = NET_TFTPC_open( ipadr, filename, &sp_hd ) ;
    if ( (compl != OK) &&
         (compl != ERROR_NET_ARP_MAC_NOT_RESOLUTED) )
    {
        NET_TFTPC_close( 0 ) ;
        return( compl ) ;
    }

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

        if (GETCHAR_CTRLC( DEFAULT_PORT ))
        {
            NET_TFTPC_close( 0 ) ;
            net_last_error = ERROR_NET_USER_BREAK ;
            compl = net_last_error ;
            break ;
        }

        NET_TFTPC_poll( &state, &compl, &cause ) ;
        if (state != TFTPC_SAP_STATE_WAIT_FIRST_BLOCK)
        {
            if (state == TFTPC_SAP_STATE_ERROR)
            {
               net_last_error = cause ;
               compl = net_last_error ;
               NET_TFTPC_close( 0 ) ;
            }
            else
            {
                compl = OK ;
            }
            break ;
        }
    }


    /* We need to reply OK, as loader will terminate by any error */
    return( compl ) ;
}

char net_getchar( void )
{
    char   byte ;
    UINT32 rcode, state, compl, cause, sp_hd ;

    rcode = NET_TFTPC_readbyte( sp_hd,
                                &byte ) ;
    if (!rcode)
    {
        return( byte ) ;
    }

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

        if (GETCHAR_CTRLC( DEFAULT_PORT ))
        {
            NET_TFTPC_close( 0 ) ;
            net_last_error  = ERROR_NET_USER_BREAK ;
            return( EOF_SREC ) ;
        }

        rcode = NET_TFTPC_readbyte( sp_hd,
                                    &byte ) ;
        if (!rcode)
        {
            return( byte ) ;
        }

        if (rcode == ERROR_NET_TFTPC_NO_DATA)
        {
            continue ;
        }

        if (rcode == ERROR_NET_TFTPC_EOF)
        {
            NET_TFTPC_close( 0 ) ;
            return( EOF_SREC ) ;
        }

        if (rcode == ERROR_NET_TFTPC_SAP_ERROR_STATE)
        {
            NET_TFTPC_poll( &state, &compl, &cause ) ;
            net_last_error = cause ;
            NET_TFTPC_close( 0 ) ;
            return( EOF_SREC ) ;
        }
    }

    /* we should never arrive here */
    return( EOF_SREC ) ;
}


UINT32
net_getbyte( UINT8 *byte )
{
    UINT32 rcode, state, compl, cause, sp_hd ;

    rcode = NET_TFTPC_readbyte( sp_hd,
                                byte ) ;
    if (!rcode)
    {
        return( rcode ) ;
    }

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

        if (GETCHAR_CTRLC( DEFAULT_PORT ))
        {
            NET_TFTPC_close( 0 ) ;
            net_last_error  = ERROR_NET_USER_BREAK ;
            return( ERROR_NET_USER_BREAK ) ;
        }

        rcode = NET_TFTPC_readbyte( sp_hd,
                                    byte ) ;
        if (!rcode)
        {
            return( rcode ) ;
        }

        if (rcode == ERROR_NET_TFTPC_NO_DATA)
        {
            continue ;
        }

        if (rcode == ERROR_NET_TFTPC_EOF)
        {
            NET_TFTPC_close( 0 ) ;
            return( rcode ) ;
        }

        if (rcode == ERROR_NET_TFTPC_SAP_ERROR_STATE)
        {
            NET_TFTPC_poll( &state, &compl, &cause ) ;
            net_last_error = cause ;
            NET_TFTPC_close( 0 ) ;
            return( rcode ) ;
        }
    }

    /* we should never arrive here */
    return( ERROR_NET_TFTPC_SAP_ERROR_STATE ) ;
}

UINT32
NET_file_read( UINT32 ipadr,
               char   *filename,
               UINT8  *buffer,
               UINT32 *size )
{
    return( NET_TFTPC_file_read( ipadr,
                                 filename,
                                 buffer,
                                 size,
                                 NET_poll ) ) ;
}

UINT32
NET_file_write( UINT32 ipadr,
                char   *filename,
                UINT8  *buffer,
                UINT32 *size )
{
    return( NET_TFTPC_file_write( ipadr,
                                  filename,
                                  buffer,
                                  size,
                                  NET_poll ) ) ;
}