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rt-thread-official/components/net/uip/rt-thread/uip_ethernetif.c

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/*
* File : ethernetif.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2010, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2010-07-07 Bernard fix ethernetif_linkoutput send mail issue.
*/
/*
* Copyright (c) 2001-2004 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#include <rtthread.h>
#include "uip.h"
#include "uip_arp.h"
#include "uip_netif.h"
#include "uip_ethernetif.h"
#include "uip_ipaddr.h"
#ifndef NULL
#define NULL (void *)0
#endif /* NULL */
#define BUF ((struct uip_eth_hdr *)&uip_buf[0])
extern u16_t uip_len, uip_slen;
/* eth rx/tx thread */
static struct rt_mailbox eth_rx_thread_mb;
static struct rt_thread eth_rx_thread;
#ifndef RT_LWIP_ETHTHREAD_PRIORITY
#define RT_ETHERNETIF_THREAD_PREORITY 0x90
static char eth_rx_thread_mb_pool[48 * 4];
static char eth_rx_thread_stack[1024];
#else
#define RT_ETHERNETIF_THREAD_PREORITY RT_LWIP_ETHTHREAD_PRIORITY
static char eth_rx_thread_mb_pool[RT_LWIP_ETHTHREAD_MBOX_SIZE * 4];
static char eth_rx_thread_stack[RT_LWIP_ETHTHREAD_STACKSIZE];
#endif
struct eth_tx_msg
{
struct netif *netif;
struct pbuf *buf;
};
static struct rt_mailbox eth_tx_thread_mb;
static struct rt_thread eth_tx_thread;
#ifndef RT_LWIP_ETHTHREAD_PRIORITY
static char eth_tx_thread_mb_pool[32 * 4];
static char eth_tx_thread_stack[512];
#else
static char eth_tx_thread_mb_pool[RT_LWIP_ETHTHREAD_MBOX_SIZE * 4];
static char eth_tx_thread_stack[RT_LWIP_ETHTHREAD_STACKSIZE];
#endif
/* the interface provided to uIP */
err_t eth_init(struct netif *netif)
{
return 0;
}
extern err_t ethernetif_linkoutput(struct netif *netif, struct pbuf *p);
err_t eth_input(struct pbuf *p,struct netif *inp)
{
struct eth_hdr *ethhdr;
if(p != RT_NULL)
{
#ifdef LINK_STATS
//LINK_STATS_INC(link.recv);
#endif LINK_STATS
ethhdr = p->payload;
switch(uip_htons(ethhdr->type))
{
case ETHTYPE_IP: //ETHTYPE_IP
etharp_ip_input(inp, p);
pbuf_header(p, -((rt_int16_t)sizeof(struct eth_hdr)));
if (tcpip_input(p, inp) != ERR_OK)
{
// discard packet
pbuf_free(p);
}
break;
case ETHTYPE_ARP:
etharp_arp_input(inp, (struct eth_addr *)inp->hwaddr, p);
break;
default:
pbuf_free(p);
p = RT_NULL;
break;
}
}
return ERR_OK;
}
err_t ethernetif_output(struct netif *netif, struct pbuf *p, struct ip_addr *ipaddr)
{
return etharp_output(netif, p, ipaddr);
}
err_t ethernetif_linkoutput(struct netif *netif, struct pbuf *p)
{
struct eth_tx_msg msg;
struct eth_device* enetif;
enetif = (struct eth_device*)netif->state;
/* send a message to eth tx thread */
msg.netif = netif;
msg.buf = p;
if (rt_mb_send(&eth_tx_thread_mb, (rt_uint32_t) &msg) == RT_EOK)
{
/* waiting for ack */
rt_sem_take(&(enetif->tx_ack), RT_WAITING_FOREVER);
}
return ERR_OK;
}
/* ethernetif APIs */
rt_err_t eth_device_init(struct eth_device* dev, const char* name)
{
struct netif* netif;
uip_ipaddr_t ipaddr;
netif = (struct netif*) rt_malloc (sizeof(struct netif));
if (netif == RT_NULL)
{
rt_kprintf("malloc netif failed\n");
return -RT_ERROR;
}
rt_memset(netif, 0, sizeof(struct netif));
/* set netif */
dev->netif = netif;
/* register to rt-thread device manager */
rt_device_register(&(dev->parent), name, RT_DEVICE_FLAG_RDWR);
dev->parent.type = RT_Device_Class_NetIf;
rt_sem_init(&(dev->tx_ack), name, 0, RT_IPC_FLAG_FIFO);
/* set name */
netif->name[0] = name[0];
netif->name[1] = name[1];
/* set hw address to 6 */
netif->hwaddr_len = 6;
/* maximum transfer unit */
netif->mtu = ETHERNET_MTU;
/* broadcast capability */
netif->flags = NETIF_FLAG_BROADCAST;
#if LWIP_IGMP
/* igmp support */
netif->flags |= NETIF_FLAG_IGMP;
#endif
/* get hardware address */
rt_device_control(&(dev->parent), NIOCTL_GADDR, netif->hwaddr);
/* set output */
netif->output = ethernetif_output;
netif->linkoutput = ethernetif_linkoutput;
/* add netif to lwip */
if (netif_add(netif, IP_ADDR_ANY, IP_ADDR_BROADCAST, IP_ADDR_ANY, dev,
eth_init, eth_input) == RT_NULL)
{
/* failed, unregister device and free netif */
rt_device_unregister(&(dev->parent));
rt_free(netif);
return -RT_ERROR;
}
netif_set_default(netif);
return RT_EOK;
}
/* ethernet buffer */
void eth_tx_thread_entry(void* parameter)
{
struct eth_tx_msg* msg;
while (1)
{
if (rt_mb_recv(&eth_tx_thread_mb, (rt_uint32_t*)&msg, RT_WAITING_FOREVER) == RT_EOK)
{
struct eth_device* enetif;
RT_ASSERT(msg->netif != RT_NULL);
RT_ASSERT(msg->buf != RT_NULL);
enetif = (struct eth_device*)msg->netif->state;
if (enetif != RT_NULL)
{
/* call driver's interface */
if (enetif->eth_tx(&(enetif->parent), msg->buf) != RT_EOK)
{
rt_kprintf("transmit eth packet failed\n");
}
}
/* send ack */
rt_sem_release(&(enetif->tx_ack));
}
}
}
/* ethernet buffer */
void eth_rx_thread_entry(void* parameter)
{
struct eth_device* device;
while (1)
{
if (rt_mb_recv(&eth_rx_thread_mb, (rt_uint32_t*)&device, RT_WAITING_FOREVER) == RT_EOK)
{
struct pbuf *p;
/* receive all of buffer */
while (1)
{
p = device->eth_rx(&(device->parent));
if (p != RT_NULL)
{
/* notify to upper layer */
eth_input(p, device->netif);
}
else break;
}
}
}
}
rt_err_t eth_device_ready(struct eth_device* dev)
{
/* post message to ethernet thread */
return rt_mb_send(&eth_rx_thread_mb, (rt_uint32_t)dev);
}
rt_err_t eth_system_device_init()
{
rt_err_t result = RT_EOK;
/* init rx thread */
/* init mailbox and create ethernet thread */
result = rt_mb_init(&eth_rx_thread_mb, "erxmb",
&eth_rx_thread_mb_pool[0], sizeof(eth_rx_thread_mb_pool)/4,
RT_IPC_FLAG_FIFO);
RT_ASSERT(result == RT_EOK);
result = rt_thread_init(&eth_rx_thread, "erx", eth_rx_thread_entry, RT_NULL,
&eth_rx_thread_stack[0], sizeof(eth_rx_thread_stack),
RT_ETHERNETIF_THREAD_PREORITY, 16);
RT_ASSERT(result == RT_EOK);
result = rt_thread_startup(&eth_rx_thread);
RT_ASSERT(result == RT_EOK);
/* init tx thread */
/* init mailbox and create ethernet thread */
result = rt_mb_init(&eth_tx_thread_mb, "etxmb",
&eth_tx_thread_mb_pool[0], sizeof(eth_tx_thread_mb_pool)/4,
RT_IPC_FLAG_FIFO);
RT_ASSERT(result == RT_EOK);
result = rt_thread_init(&eth_tx_thread, "etx", eth_tx_thread_entry, RT_NULL,
&eth_tx_thread_stack[0], sizeof(eth_tx_thread_stack),
RT_ETHERNETIF_THREAD_PREORITY, 16);
RT_ASSERT(result == RT_EOK);
result = rt_thread_startup(&eth_tx_thread);
RT_ASSERT(result == RT_EOK);
return result;
}
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