pktif.c

NXPl788上lwip的无操作系统移植,基于Embest开发板

/*
 * 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 lwIP pktif
 *
 ****************************************************************************
 *
 * 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.
 *
 */

#include "lwip/opt.h"

#if LWIP_ETHERNET

#include "pktif.h"

/* get the windows definitions of the following 4 functions out of the way */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "lwip/debug.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 "lwip/tcpip.h"

#include "netif/etharp.h"
#include "pktdrv.h"
#include "pcap_helper.h"

/* include the port-dependent configuration */
#include "lwipcfg_msvc.h"

/* Define those to better describe your network interface.
   For now, we use 'e0', 'e1', 'e2' and so on */
#define IFNAME0               'e'
#define IFNAME1               '0'

/* index of the network adapter to use for lwIP */
#ifndef PACKET_LIB_ADAPTER_NR
#define PACKET_LIB_ADAPTER_NR  0
#endif

/* Define PHY delay when "link up" */
#ifndef PHY_LINKUP_DELAY
#define PHY_LINKUP_DELAY       5000
#endif

/* link state notification macro */
#if NO_SYS
#define NOTIFY_LINKSTATE(netif, linkfunc) linkfunc(netif)
#else  /* NO_SYS*/
#if LWIP_TCPIP_TIMEOUT
#define NOTIFY_LINKSTATE(netif, linkfunc) tcpip_timeout(PHY_LINKUP_DELAY, (sys_timeout_handler)linkfunc, netif)
#else /* LWIP_TCPIP_TIMEOUT */
#define NOTIFY_LINKSTATE(netif, linkfunc) tcpip_callback((tcpip_callback_fn)linkfunc, netif)
#endif /* LWIP_TCPIP_TIMEOUT */
#endif /* NO_SYS*/

/* Forward declarations. */
void ethernetif_process_input(void *arg, void *packet, int len);

/*-----------------------------------------------------------------------------------*/
static void
low_level_init(struct netif *netif)
{
  char adapter_mac_addr[ETHARP_HWADDR_LEN];
  u8_t my_mac_addr[ETHARP_HWADDR_LEN] = LWIP_MAC_ADDR_BASE;
  int adapter_num = PACKET_LIB_ADAPTER_NR;
  enum link_adapter_event linkstate;

#ifdef PACKET_LIB_GET_ADAPTER_NETADDRESS
  ip_addr_t netaddr;
#define GUID_LEN 128
  char guid[GUID_LEN + 1];
  memset(&guid, 0, sizeof(guid));
  PACKET_LIB_GET_ADAPTER_NETADDRESS(&netaddr);
  if (get_adapter_index_from_addr((struct in_addr *)&netaddr, guid, GUID_LEN) < 0) {
     printf("ERROR initializing network adapter, failed to get GUID for network address %s\n", ip_ntoa(&netaddr));
     LWIP_ASSERT("ERROR initializing network adapter, failed to get GUID for network address!", 0);
     return;
  }
  adapter_num = get_adapter_index(guid);
  if (adapter_num < 0) {
     printf("ERROR finding network adapter with GUID \"%s\"!\n", guid);
     LWIP_ASSERT("ERROR finding network adapter with expected GUID!", 0);
     return;
  }

#else /* PACKET_LIB_GET_ADAPTER_NETADDRESS */
#ifdef PACKET_LIB_ADAPTER_GUID
  /* get adapter index for guid string */
  adapter_num = get_adapter_index(PACKET_LIB_ADAPTER_GUID);
  if (adapter_num < 0) {
    printf("ERROR finding network adapter with GUID \"%s\"!\n", PACKET_LIB_ADAPTER_GUID);
    LWIP_ASSERT("ERROR initializing network adapter!\n", 0);
    return;
  }
#endif /* PACKET_LIB_ADAPTER_GUID */
#endif /* PACKET_LIB_GET_ADAPTER_NETADDRESS */

  /* Do whatever else is needed to initialize interface. */
  if ((netif->state = init_adapter(adapter_num, adapter_mac_addr,
                      ethernetif_process_input, netif, &linkstate)) == NULL) {
    printf("ERROR initializing network adapter %d!\n", PACKET_LIB_ADAPTER_NR);
    LWIP_ASSERT("ERROR initializing network adapter!", 0);
    return;
  }

  /* change the MAC address to a unique value
     so that multiple ethernetifs are supported */
  my_mac_addr[ETHARP_HWADDR_LEN - 1] += netif->num;
  /* Copy MAC addr */
  memcpy(&netif->hwaddr, my_mac_addr, ETHARP_HWADDR_LEN);

  if (linkstate == LINKEVENT_UP) {
    netif_set_link_up(netif);
  } else {
    netif_set_link_down(netif);
  }

  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]));
}

/*-----------------------------------------------------------------------------------*/
/*
 * 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 *netif, struct pbuf *p)
{
  struct pbuf *q;
  unsigned char buffer[1600];
  unsigned char *ptr;
  struct eth_hdr *ethhdr;
  u16_t tot_len = p->tot_len - ETH_PAD_SIZE;

#if defined(LWIP_DEBUG) && LWIP_NETIF_TX_SINGLE_PBUF
  LWIP_ASSERT("p->next == NULL && p->len == p->tot_len", p->next == NULL && p->len == p->tot_len);
#endif

  /* initiate transfer(); */
  if (p->tot_len >= sizeof(buffer)) {
    LINK_STATS_INC(link.lenerr);
    LINK_STATS_INC(link.drop);
    snmp_inc_ifoutdiscards(netif);
    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));
    if (q == p) {
      memcpy(ptr, &((char*)q->payload)[ETH_PAD_SIZE], q->len - ETH_PAD_SIZE);
      ptr += q->len - ETH_PAD_SIZE;
    } else {
      memcpy(ptr, q->payload, q->len);
      ptr += q->len;
    }
  }

  /* signal that packet should be sent(); */
  if (packet_send(netif->state, buffer, tot_len) < 0) {
    LINK_STATS_INC(link.memerr);