nif.c

motorola 针对coldfire 5275 评估板的Dbug bootloader源程序

/*
 * File:        nif.c
 * Purpose:     Network InterFace routines
 *
 * Notes:
 *
 * Modifications:
 *
 */
#include "src/include/dbug.h"
#include "src/uif/net/net.h"

#ifdef DBUG_NETWORK

/********************************************************************/
int
nif_protocol_exist (NIF *nif, uint16 protocol)
{
    /*
     * This function searches the list of supported protocols
     * on the particular NIF and if a protocol handler exists,
     * TRUE is returned.  This function is useful for network cards
     * that needn't read in the entire frame but can discard frames
     * arbitrarily.
     */
    int index;

    for (index = 0; index < nif->num_protocol; ++index)
    {
        if (nif->protocol[index].protocol == protocol)
        {
            return TRUE;
        }
    }
    return FALSE;
}

/********************************************************************/
void
nif_protocol_handler (NIF *nif, uint16 protocol, NBUF *pNbuf)
{
    /*
     * This function searches the list of supported protocols
     * on the particular NIF and if a protocol handler exists,
     * the protocol handler is invoked.  This routine called by
     * network device driver after receiving a frame.
     */
    int index;

    for (index = 0; index < nif->num_protocol; ++index)
    {
        if (nif->protocol[index].protocol == protocol)
            nif->protocol[index].handler(nif,pNbuf);
    }
}

/********************************************************************/
void *
nif_get_protocol_info (NIF *nif, uint16 protocol)
{
    /*
     * This function searches the list of supported protocols
     * on the particular NIF and returns a pointer to the
     * config info for 'protocol', otherwise NULL is returned.
     */
    int index;

    for (index = 0; index < nif->num_protocol; ++index)
    {
        if (nif->protocol[index].protocol == protocol)
            return (void *)nif->protocol[index].info;
    }
    return (void *)0;
}

/********************************************************************/
int
nif_bind_protocol (NIF *nif, uint16 protocol,
                   void (*handler)(NIF *,NBUF *),
                   void *info)
{
    /*
     * This function registers 'protocol' as a supported
     * protocol in 'nif'.  
     */
    if (nif->num_protocol < (MAX_SUP_PROTO - 1))
    {
        nif->protocol[nif->num_protocol].protocol = protocol;
        nif->protocol[nif->num_protocol].handler = (void(*)(NIF*,NBUF*))handler;
        nif->protocol[nif->num_protocol].info = info;
        ++nif->num_protocol;
        return TRUE;
    }
    return FALSE;
}

/********************************************************************/
NIF *
nif_init (NIF *nif)
{
    int i;

    for (i = 0; i < ETH_ADDR_LEN; ++i)
    {
        nif->hwa[i] = 0;
        nif->broadcast[i] = 0xFF;
    }

    for (i = 0; i < MAX_SUP_PROTO; ++i)
    {
        nif->protocol[i].protocol = 0;
        nif->protocol[i].handler = 0;
        nif->protocol[i].info = 0;
    }
    nif->num_protocol = 0;

    nif->mtu = 0;
    nif->ch = 0;
    nif->send = 0;

    nif->f_rx = 0;
    nif->f_tx = 0;
    nif->f_rx_err = 0;
    nif->f_tx_err = 0;
    nif->f_err = 0;

    return nif;
}
/********************************************************************/

#endif /* #ifdef DBUG_NETWORK */