lwip-contrib-mac/ports/win32/pktif.c

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/*
* Copyright (c) 2001,2002 Florian Schulze.
* 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.
* 3. Neither the name of the authors nor the names of the contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``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 AUTHORS OR CONTRIBUTORS 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.
*
* pktif.c - This file is part of lwIPtest
*
****************************************************************************
*
* This file is derived from an example in lwIP with the following license:
*
* Copyright (c) 2001, Swedish Institute of Computer Science.
* 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.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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.
*
*/
/* get the windows definitions of the following 4 functions out of the way */
#include <stdlib.h>
#include <stdio.h>
#include "lwip/debug.h"
#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/mem.h"
#include "lwip/pbuf.h"
#include "lwip/stats.h"
#include "lwip/sys.h"
#include "lwip/ip.h"
#include "lwip/snmp.h"
#include "netif/etharp.h"
/* include the port-dependent configuration */
#include "lwipcfg_msvc.h"
#undef NETIF_DEBUG
#define NETIF_DEBUG 0
/* Define those to better describe your network interface. */
#define IFNAME0 'p'
#define IFNAME1 'k'
/* index of the network adapter to use for lwIP */
#ifndef PACKET_LIB_ADAPTER_NR
#define PACKET_LIB_ADAPTER_NR 0
#endif
static struct eth_addr broadcastaddr = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
/* Forward declarations. */
static void ethernetif_input(struct netif *netif);
static struct netif *pktif_netif;
extern unsigned char ethaddr[ETHARP_HWADDR_LEN];
extern unsigned char *cur_packet;
extern int cur_length;
extern int init_adapter(int adapter_num, char* mac_addr);
extern int packet_send(void *buffer, int len);
/*-----------------------------------------------------------------------------------*/
static void
low_level_init(struct netif *netif)
{
char mac_addr[ETHARP_HWADDR_LEN];
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]));
/* Do whatever else is needed to initialize interface. */
if (init_adapter(PACKET_LIB_ADAPTER_NR, mac_addr) != 0) {
printf("ERROR initializing network adapter %d!\n", PACKET_LIB_ADAPTER_NR);
return;
}
/* Prepare MAC addr: increase the last octet so that lwIP netif has a similar but different MAC addr */
memcpy(&netif->hwaddr, mac_addr, ETHARP_HWADDR_LEN);
netif->hwaddr[ETHARP_HWADDR_LEN - 1]++;
pktif_netif=netif;
}
/*-----------------------------------------------------------------------------------*/
/*
* low_level_output():
*
* Should do the actual transmission of the packet. The packet is
* contained in the pbuf that is passed to the function. This pbuf
* might be chained.
*
*/
/*-----------------------------------------------------------------------------------*/
static err_t
low_level_output(struct netif *ethernetif, struct pbuf *p)
{
struct pbuf *q;
unsigned char buffer[1600];
unsigned char *ptr;
/* initiate transfer(); */
if (p->tot_len >= sizeof(buffer)) {
return ERR_BUF;
}
ptr = buffer;
for(q = p; q != NULL; q = q->next) {
/* Send the data from the pbuf to the interface, one pbuf at a
time. The size of the data in each pbuf is kept in the ->len
variable. */
/* send data from(q->payload, q->len); */
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));
memcpy(ptr, q->payload, q->len);
ptr += q->len;
}
/* signal that packet should be sent(); */
if (packet_send(buffer, p->tot_len) < 0) {
return ERR_BUF;
}
#if LINK_STATS
lwip_stats.link.xmit++;
#endif /* LINK_STATS */
return ERR_OK;
}
/*-----------------------------------------------------------------------------------*/
/*
* low_level_input():
*
* Should allocate a pbuf and transfer the bytes of the incoming
* packet from the interface into the pbuf.
*
*/
/*-----------------------------------------------------------------------------------*/
static struct pbuf *
low_level_input(struct netif *netif)
{
struct pbuf *p, *q;
int start, length;
struct eth_hdr *ethhdr;
/* Obtain the size of the packet and put it into the "len" variable. */
length = cur_length;
if (length<=0) {
return NULL;
}
ethhdr = (struct eth_hdr*)cur_packet;
/* MAC filter: only let my MAC or broadcast through */
if ((memcmp(&ethhdr->dest, &netif->hwaddr, ETHARP_HWADDR_LEN)) &&
(memcmp(&ethhdr->dest, &broadcastaddr, ETHARP_HWADDR_LEN))) {
/* acknowledge that packet has been read(); */
cur_length=0;
return NULL;
}
/* We allocate a pbuf chain of pbufs from the pool. */
p = pbuf_alloc(PBUF_LINK, (u16_t)length, PBUF_POOL);
LWIP_DEBUGF(NETIF_DEBUG, ("netif: recv length %i p->tot_len %i\n", length, (int)p->tot_len));
if (p != NULL) {
/* We iterate over the pbuf chain until we have read the entire
packet into the pbuf. */
start=0;
for (q = p; q != NULL; q = q->next) {
/* Read enough bytes to fill this pbuf in the chain. The
available data in the pbuf is given by the q->len
variable. */
/* read data into(q->payload, q->len); */
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));
memcpy(q->payload, &cur_packet[start], q->len);
start += q->len;
length -= q->len;
if (length<=0) {
break;
}
}
/* acknowledge that packet has been read(); */
cur_length = 0;
#if LINK_STATS
lwip_stats.link.recv++;
#endif /* LINK_STATS */
} else {
/* drop packet(); */
cur_length = 0;
#if LINK_STATS
lwip_stats.link.memerr++;
lwip_stats.link.drop++;
#endif /* LINK_STATS */
}
return p;
}
/*-----------------------------------------------------------------------------------*/
/*
* ethernetif_input():
*
* This function should be called when a packet is ready to be read
* from the interface. It uses the function low_level_input() that
* should handle the actual reception of bytes from the network
* interface.
*
*/
/*-----------------------------------------------------------------------------------*/
static void
ethernetif_input(struct netif *netif)
{
struct ethernetif *ethernetif;
struct eth_hdr *ethhdr;
struct pbuf *p;
ethernetif = netif->state;
/* move received packet into a new pbuf */
p = low_level_input(netif);
/* no packet could be read, silently ignore this */
if (p == NULL) {
return;
}
/* points to packet payload, which starts with an Ethernet header */
ethhdr = p->payload;
switch (htons(ethhdr->type)) {
/* IP or ARP packet? */
case ETHTYPE_IP:
case ETHTYPE_ARP:
#if PPPOE_SUPPORT
/* PPPoE packet? */
case ETHTYPE_PPPOEDISC:
case ETHTYPE_PPPOE:
#endif /* PPPOE_SUPPORT */
/* full packet send to tcpip_thread to process */
if (netif->input(p, netif)!=ERR_OK) {
LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_input: IP input error\n"));
pbuf_free(p);
p = NULL;
}
break;
default:
pbuf_free(p);
p = NULL;
break;
}
}
/*-----------------------------------------------------------------------------------*/
/*
* ethernetif_init():
*
* Should be called at the beginning of the program to set up the
* network interface. It calls the function low_level_init() to do the
* actual setup of the hardware.
*
*/
/*-----------------------------------------------------------------------------------*/
err_t
ethernetif_init(struct netif *netif)
{
netif->name[0] = IFNAME0;
netif->name[1] = IFNAME1;
netif->linkoutput = low_level_output;
netif->output = etharp_output;
netif->mtu = 1500;
netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP;
netif->hwaddr_len = ETHARP_HWADDR_LEN;
NETIF_INIT_SNMP(netif, snmp_ifType_ethernet_csmacd, 100000000);
low_level_init(netif);
return ERR_OK;
}
/*-----------------------------------------------------------------------------------*/
/*
* pktif_update():
*
* Needs to be called periodically to get new packets. This could
* be done inside a thread.
*/
/*-----------------------------------------------------------------------------------*/
void process_input(void)
{
ethernetif_input(pktif_netif);
}