minix/sys/arch/i386/stand/lib/netif/netif_small.c
2012-02-09 18:48:13 +01:00

165 lines
3.7 KiB
C

/* $NetBSD: netif_small.c,v 1.12 2009/10/21 23:12:09 snj Exp $ */
/* minimal netif - for boot ROMs we don't have to select between
several interfaces, and we have to save space
hacked from netbsd:sys/arch/mvme68k/stand/libsa/netif.c
*/
/*
* Copyright (c) 1995 Gordon W. Ross
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#ifdef _STANDALONE
#include <lib/libkern/libkern.h>
#else
#include <string.h>
#endif
#include <net/if.h>
#include <net/if_ether.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <lib/libsa/stand.h>
#include <lib/libsa/net.h>
#include "netif_small.h"
#include "etherdrv.h"
#ifdef NETIF_DEBUG
int netif_debug = 1;
#endif
/* we allow for one socket only */
static struct iodesc iosocket;
struct iodesc *
socktodesc(int sock)
{
if (sock != 0) {
return NULL;
}
return &iosocket;
}
int
netif_open(void)
{
struct iodesc *io;
io = &iosocket;
if (io->io_netif) {
#ifdef NETIF_DEBUG
printf("netif_open: device busy\n");
#endif
return -1;
}
memset(io, 0, sizeof(*io));
if (!EtherInit(io->myea)) {
printf("EtherInit failed\n");
return -1;
}
io->io_netif = (void*)1; /* mark busy */
return 0;
}
void
netif_close(int fd)
{
struct iodesc *io;
if (fd != 0) {
return;
}
io = &iosocket;
if (io->io_netif) {
EtherStop();
io->io_netif = NULL;
}
}
/*
* Send a packet. The ether header is already there.
* Return the length sent (or -1 on error).
*/
int
netif_put(struct iodesc *desc, void *pkt, size_t len)
{
#ifdef NETIF_DEBUG
if (netif_debug) {
struct ether_header *eh;
printf("netif_put: desc=%p pkt=%p len=%d\n",
desc, pkt, len);
eh = pkt;
printf("dst: %s ", ether_sprintf(eh->ether_dhost));
printf("src: %s ", ether_sprintf(eh->ether_shost));
printf("type: 0x%x\n", eh->ether_type & 0xFFFF);
}
#endif
return EtherSend(pkt, len);
}
/*
* Receive a packet, including the ether header.
* Return the total length received (or -1 on error).
*/
int
netif_get(struct iodesc *desc, void *pkt, size_t maxlen, saseconds_t timo)
{
int len;
satime_t t;
#ifdef NETIF_DEBUG
if (netif_debug)
printf("netif_get: pkt=%p, maxlen=%d, tmo=%d\n",
pkt, maxlen, timo);
#endif
t = getsecs();
len = 0;
while (((getsecs() - t) < timo) && !len) {
len = EtherReceive(pkt, maxlen);
}
#ifdef NETIF_DEBUG
if (netif_debug) {
struct ether_header *eh = pkt;
printf("dst: %s ", ether_sprintf(eh->ether_dhost));
printf("src: %s ", ether_sprintf(eh->ether_shost));
printf("type: 0x%x\n", eh->ether_type & 0xFFFF);
}
#endif
return len;
}