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