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/*
* 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);
}
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