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321 lines
10 KiB
C
321 lines
10 KiB
C
/*
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* Copyright (c) 2001,2002 Florian Schulze.
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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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*
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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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* 3. Neither the name of the authors nor the names of the contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* pktif.c - This file is part of lwIPtest
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*
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****************************************************************************
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*
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* This file is derived from an example in lwIP with the following license:
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*
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* Copyright (c) 2001, Swedish Institute of Computer Science.
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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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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/* get the windows definitions of the following 4 functions out of the way */
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#include <stdlib.h>
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#include <stdio.h>
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#include "lwip/debug.h"
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#include "lwip/opt.h"
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#include "lwip/def.h"
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#include "lwip/mem.h"
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#include "lwip/pbuf.h"
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#include "lwip/stats.h"
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#include "lwip/sys.h"
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#include "lwip/ip.h"
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#include "netif/etharp.h"
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#undef NETIF_DEBUG
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/* Define those to better describe your network interface. */
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#define IFNAME0 'p'
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#define IFNAME1 'k'
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static struct eth_addr broadcastaddr = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
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/* Forward declarations. */
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static void ethernetif_input(struct netif *netif);
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static struct netif *pktif_netif;
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extern unsigned char ethaddr[6];
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extern unsigned char *cur_packet;
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extern int cur_length;
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extern int packet_send(void *buffer, int len);
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/*-----------------------------------------------------------------------------------*/
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static void
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low_level_init(struct netif *netif)
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{
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#ifdef NETIF_DEBUG
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LWIP_DEBUGF(NETIF_DEBUG, ("pktif: eth_addr %02X%02X%02X%02X%02X%02X\n",netif->hwaddr[0],netif->hwaddr[1],netif->hwaddr[2],netif->hwaddr[3],netif->hwaddr[4],netif->hwaddr[5]));
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#endif /* NETIF_DEBUG */
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/* Do whatever else is needed to initialize interface. */
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pktif_netif=netif;
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}
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/*-----------------------------------------------------------------------------------*/
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/*
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* low_level_output():
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*
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* Should do the actual transmission of the packet. The packet is
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* contained in the pbuf that is passed to the function. This pbuf
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* might be chained.
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*
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*/
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/*-----------------------------------------------------------------------------------*/
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static err_t
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low_level_output(struct netif *ethernetif, struct pbuf *p)
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{
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struct pbuf *q;
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unsigned char buffer[1600];
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unsigned char *ptr;
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/* initiate transfer(); */
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if (p->tot_len>=1600)
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return ERR_BUF;
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ptr=buffer;
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for(q = p; q != NULL; q = q->next) {
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/* Send the data from the pbuf to the interface, one pbuf at a
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time. The size of the data in each pbuf is kept in the ->len
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variable. */
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/* send data from(q->payload, q->len); */
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#ifdef NETIF_DEBUG
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LWIP_DEBUGF(NETIF_DEBUG, ("netif: send ptr %p q->payload %p q->len %i q->next %p\n", ptr, q->payload, (int)q->len, q->next));
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#endif
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memcpy(ptr,q->payload,q->len);
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ptr+=q->len;
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}
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/* signal that packet should be sent(); */
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if (packet_send(buffer, p->tot_len) < 0)
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return ERR_BUF;
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#ifdef LINK_STATS
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lwip_stats.link.xmit++;
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#endif /* LINK_STATS */
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return ERR_OK;
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}
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/*-----------------------------------------------------------------------------------*/
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/*
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* low_level_input():
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*
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* Should allocate a pbuf and transfer the bytes of the incoming
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* packet from the interface into the pbuf.
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*
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*/
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/*-----------------------------------------------------------------------------------*/
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static struct pbuf *
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low_level_input(struct netif *netif)
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{
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struct pbuf *p, *q;
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int start, length;
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struct eth_hdr *ethhdr;
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/* Obtain the size of the packet and put it into the "len"
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variable. */
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length = cur_length;
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if (length<=0)
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return NULL;
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ethhdr = (struct eth_hdr*)cur_packet;
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/* MAC filter: only let my MAC or broadcast through */
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if((memcmp(ðhdr->dest, &netif->hwaddr, 6)) && (memcmp(ðhdr->dest, &broadcastaddr, 6))) {
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/* acknowledge that packet has been read(); */
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cur_length=0;
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return NULL;
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}
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/* We allocate a pbuf chain of pbufs from the pool. */
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p = pbuf_alloc(PBUF_LINK, (u16_t)length, PBUF_POOL);
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#ifdef NETIF_DEBUG
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LWIP_DEBUGF(NETIF_DEBUG, ("netif: recv length %i p->tot_len %i\n", length, (int)p->tot_len));
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#endif
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if (p != NULL) {
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/* We iterate over the pbuf chain until we have read the entire
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packet into the pbuf. */
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start=0;
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for(q = p; q != NULL; q = q->next) {
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/* Read enough bytes to fill this pbuf in the chain. The
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available data in the pbuf is given by the q->len
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variable. */
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/* read data into(q->payload, q->len); */
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#ifdef NETIF_DEBUG
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LWIP_DEBUGF(NETIF_DEBUG, ("netif: recv start %i length %i q->payload %p q->len %i q->next %p\n", start, length, q->payload, (int)q->len, q->next));
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#endif
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memcpy(q->payload,&cur_packet[start],q->len);
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start+=q->len;
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length-=q->len;
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if (length<=0)
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break;
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}
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/* acknowledge that packet has been read(); */
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cur_length=0;
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#ifdef LINK_STATS
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lwip_stats.link.recv++;
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#endif /* LINK_STATS */
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} else {
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/* drop packet(); */
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cur_length=0;
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#ifdef LINK_STATS
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lwip_stats.link.memerr++;
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lwip_stats.link.drop++;
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#endif /* LINK_STATS */
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}
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return p;
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}
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/*-----------------------------------------------------------------------------------*/
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/*
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* ethernetif_input():
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*
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* This function should be called when a packet is ready to be read
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* from the interface. It uses the function low_level_input() that
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* should handle the actual reception of bytes from the network
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* interface.
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*
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*/
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/*-----------------------------------------------------------------------------------*/
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static void
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ethernetif_input(struct netif *netif)
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{
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struct ethernetif *ethernetif;
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struct eth_hdr *ethhdr;
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struct pbuf *p;
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ethernetif = netif->state;
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p = low_level_input(netif);
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if (p != NULL) {
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#if LINK_STATS
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lwip_stats.link.recv++;
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#endif /* LINK_STATS */
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ethhdr = p->payload;
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switch (htons(ethhdr->type)) {
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#if ETHARP_TCPIP_INPUT
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/* IP or ARP packet? */
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case ETHTYPE_IP:
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case ETHTYPE_ARP:
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netif->input(p, netif);
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break;
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#else
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case ETHTYPE_IP:
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etharp_ip_input(netif, p);
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pbuf_header(p, -14);
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netif->input(p, netif);
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break;
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case ETHTYPE_ARP:
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etharp_arp_input(netif, ethernetif->ethaddr, p);
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break;
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#endif
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default:
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pbuf_free(p);
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break;
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}
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}
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}
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/*-----------------------------------------------------------------------------------*/
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/*
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* ethernetif_init():
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*
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* Should be called at the beginning of the program to set up the
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* network interface. It calls the function low_level_init() to do the
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* actual setup of the hardware.
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*
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*/
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/*-----------------------------------------------------------------------------------*/
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err_t
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ethernetif_init(struct netif *netif)
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{
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netif->name[0] = IFNAME0;
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netif->name[1] = IFNAME1;
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netif->linkoutput = low_level_output;
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netif->output = etharp_output;
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netif->mtu = 1500;
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netif->flags = NETIF_FLAG_BROADCAST;
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netif->hwaddr_len = 6;
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NETIF_INIT_SNMP(netif, 6, 100000000);
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low_level_init(netif);
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return ERR_OK;
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}
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/*-----------------------------------------------------------------------------------*/
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/*
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* pktif_update():
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*
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* Needs to be called periodically to get new packets. This could
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* be done inside a thread.
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*/
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/*-----------------------------------------------------------------------------------*/
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void process_input(void)
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{
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ethernetif_input(pktif_netif);
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}
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