forked from xuos/xiuos
187 lines
5.4 KiB
C
187 lines
5.4 KiB
C
|
|
/*
|
|
* Copyright (c) 2020 AIIT XUOS Lab
|
|
* XiUOS is licensed under Mulan PSL v2.
|
|
* You can use this software according to the terms and conditions of the Mulan PSL v2.
|
|
* You may obtain a copy of Mulan PSL v2 at:
|
|
* http://license.coscl.org.cn/MulanPSL2
|
|
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
|
|
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
|
|
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
|
|
* See the Mulan PSL v2 for more details.
|
|
*/
|
|
|
|
#include "lwip/opt.h"
|
|
#include "lwip/def.h"
|
|
#include "lwip/mem.h"
|
|
#include "lwip/pbuf.h"
|
|
#include "lwip/stats.h"
|
|
#include "lwip/snmp.h"
|
|
#include "lwip/ethip6.h"
|
|
#include "lwip/etharp.h"
|
|
#include "libserial.h"
|
|
/* Define those to better describe your network interface. */
|
|
#define IFNAME0 'e'
|
|
#define IFNAME1 'n'
|
|
|
|
/**
|
|
* In this function, the hardware should be initialized.
|
|
* Called from ethernetif_init().
|
|
*
|
|
* @param netif the already initialized lwip network interface structure
|
|
* for this ethernetif
|
|
*/
|
|
static void
|
|
low_level_init(struct netif *netif)
|
|
{
|
|
#if LWIP_ARP || LWIP_ETHERNET
|
|
|
|
/* set MAC hardware address length */
|
|
netif->hwaddr_len = ETH_HWADDR_LEN;
|
|
|
|
/* set MAC hardware address */
|
|
netif->hwaddr[0] = 0x02;
|
|
netif->hwaddr[1] = 0x12;
|
|
netif->hwaddr[2] = 0x34;
|
|
netif->hwaddr[3] = 0x56;
|
|
netif->hwaddr[4] = 0x78;
|
|
netif->hwaddr[5] = 0xab;
|
|
netif->hwaddr_len = 6;
|
|
|
|
/* maximum transfer unit */
|
|
netif->mtu = 1500;
|
|
|
|
#if LWIP_ARP
|
|
netif->flags |= NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP;
|
|
#else
|
|
netif->flags |= NETIF_FLAG_BROADCAST;
|
|
#endif /* LWIP_ARP */
|
|
|
|
#endif /* LWIP_ARP || LWIP_ETHERNET */
|
|
|
|
}
|
|
|
|
/**
|
|
* This function 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.
|
|
*
|
|
* @param netif the lwip network interface structure for this ethernetif
|
|
* @param p the MAC packet to send (e.g. IP packet including MAC addresses and type)
|
|
* @return ERR_OK if the packet could be sent
|
|
* an err_t value if the packet couldn't be sent
|
|
*
|
|
* @note Returning ERR_MEM here if a DMA queue of your MAC is full can lead to
|
|
* strange results. You might consider waiting for space in the DMA queue
|
|
* to become available since the stack doesn't retry to send a packet
|
|
* dropped because of memory failure (except for the TCP timers).
|
|
*/
|
|
|
|
static err_t
|
|
low_level_output(struct netif *netif, struct pbuf *p)
|
|
{
|
|
char buf[1518];
|
|
#if ETH_PAD_SIZE
|
|
pbuf_remove_header(p, ETH_PAD_SIZE); /* drop the padding word */
|
|
#endif
|
|
|
|
pbuf_copy_partial(p, buf, p->tot_len, 0);
|
|
|
|
printf("output %s\n", buf);
|
|
return ERR_OK;
|
|
}
|
|
|
|
/**
|
|
* Should allocate a pbuf and transfer the bytes of the incoming
|
|
* packet from the interface into the pbuf.
|
|
*
|
|
* @param netif the lwip network interface structure for this ethernetif
|
|
* @return a pbuf filled with the received packet (including MAC header)
|
|
* NULL on memory error
|
|
*/
|
|
static struct pbuf* low_level_input(struct netif *netif)
|
|
{
|
|
struct pbuf *p, *q;
|
|
|
|
|
|
return p;
|
|
}
|
|
|
|
/**
|
|
* 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. Then the type of the received packet is determined and
|
|
* the appropriate input function is called.
|
|
*
|
|
* @param netif the lwip network interface structure for this ethernetif
|
|
*/
|
|
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);
|
|
/* if no packet could be read, silently ignore this */
|
|
if (p != NULL) {
|
|
/* pass all packets to ethernet_input, which decides what packets it supports */
|
|
if (netif->input(p, netif) != ERR_OK) {
|
|
LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_input: IP input error\n"));
|
|
pbuf_free(p);
|
|
p = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* This function should be passed as a parameter to netif_add().
|
|
*
|
|
* @param netif the lwip network interface structure for this ethernetif
|
|
* @return ERR_OK if the loopif is initialized
|
|
* ERR_MEM if private data couldn't be allocated
|
|
* any other err_t on error
|
|
*/
|
|
err_t
|
|
ethernetif_init(struct netif *netif)
|
|
{
|
|
LWIP_ASSERT("netif != NULL", (netif != NULL));
|
|
|
|
#if LWIP_NETIF_HOSTNAME
|
|
/* Initialize interface hostname */
|
|
netif->hostname = "lwip";
|
|
#endif /* LWIP_NETIF_HOSTNAME */
|
|
|
|
/*
|
|
* Initialize the snmp variables and counters inside the struct netif.
|
|
* The last argument should be replaced with your link speed, in units
|
|
* of bits per second.
|
|
*/
|
|
MIB2_INIT_NETIF(netif, snmp_ifType_ethernet_csmacd, 100000000);
|
|
|
|
netif->name[0] = IFNAME0;
|
|
netif->name[1] = IFNAME1;
|
|
#if LWIP_IPV4
|
|
netif->output = etharp_output;
|
|
#endif /* LWIP_IPV4 */
|
|
#if LWIP_IPV6
|
|
netif->output_ip6 = ethip6_output;
|
|
#endif /* LWIP_IPV6 */
|
|
netif->linkoutput = low_level_output;
|
|
|
|
/* initialize the hardware */
|
|
low_level_init(netif);
|
|
|
|
return ERR_OK;
|
|
}
|
|
|
|
|