Subversion Repositories planix.SVN

/*
 * An ethernet /dev/null.
 * Useful as a bridging target with ethernet-based VPN.
 */
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "../port/error.h"
#include "../port/netif.h"
#include "etherif.h"

static long
ctl(Ether *ether, void *buf, long n)
{
        uchar ea[Eaddrlen];
        Cmdbuf *cb;

        cb = parsecmd(buf, n);
        if(cb->nf >= 2
        && strcmp(cb->f[0], "ea")==0
        && parseether(ea, cb->f[1]) == 0){
                free(cb);
                memmove(ether->ea, ea, Eaddrlen);
                memmove(ether->addr, ether->ea, Eaddrlen);
                return 0;
        }
        free(cb);
        error(Ebadctl);
        return -1;      /* not reached */
}

static void
nop(Ether*)
{
}

static int
reset(Ether* ether)
{
        uchar ea[Eaddrlen];

        if(ether->type==nil)
                return -1;
        memset(ea, 0, sizeof ea);
        ether->mbps = 1000;
        ether->attach = nop;
        ether->transmit = nop;
        ether->irq = -1;
        ether->interrupt = nil;
        ether->ifstat = nil;
        ether->ctl = ctl;
        ether->promiscuous = nil;
        ether->multicast = nil;
        ether->arg = ether;
        return 0;
}

void
ethersinklink(void)
{
        addethercard("sink", reset);
}