Network

lwip组件问题，在多个平台上都发现问题

发布于 2019-04-27 03:07:13 浏览：5356 订阅该版

35 个回答

armink 2019-04-27

这家伙很懒，什么也没写！

还没想好 2019-04-27

这家伙很懒，什么也没写！

xiaoqi 2019-04-27

这家伙很懒，什么也没写！

tsx1983 2019-04-27

这家伙很懒，什么也没写！

xiaoqi 2019-04-27

这家伙很懒，什么也没写！

bernard 2019-04-27

这家伙很懒，什么也没写！

xiaoqi 2019-04-27

这家伙很懒，什么也没写！

>可以提供复现的测试代码吗？

---

/*
 * Copyright (c) 2006-2018, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2009-01-05     Bernard      the first version
 * 2014-04-27     Bernard      make code cleanup.
 * 2017-08-25     LongfeiMa    transplantation for stm32h7xx
 */
 #include <board.h>
#include <rtthread.h>
#include <stdio.h>
#include <string.h>
//#include <lwip/sockets.h>
#include <sys/socket.h> 
#include "netdb.h"
//#include "netif/ethernetif.h"
#define BUFSZ       (4096)
static void rt_tcpclientthread_entry(void *parameter)
{
    int *connected=(int *)parameter;
    uint16_t bytes_received;
    char *recv_data; /* 用于接收的指针，后面会做一次动态分配以请求可用内存 */
    int ret;
    if(connected==NULL)
    {
        return;
    }
    recv_data = rt_malloc(BUFSZ + 1); /* 分配接收用的数据缓冲 */
    if (recv_data == RT_NULL)
    {
        rt_kprintf("No memory\n");
        return;
    }
    /* 客户端连接的处理 */
    while (1)
    {
        /* 从connected socket中接收数据，接收buffer是1024大小，但并不一定能够收到1024大小的数据 */
        bytes_received = recv(*connected, recv_data, BUFSZ, 0);
        if (bytes_received < 0)
        {
            /* 接收失败，关闭这个connected socket */
            closesocket(*connected);
            rt_free(connected);
             rt_free(recv_data);
            return;
        }
        else if (bytes_received == 0)
        {
            /* 打印recv函数返回值为0的警告信息 */
            rt_kprintf("\nReceived warning,recv function return 0.\r\n");
            closesocket(*connected);
            rt_free(connected);
             rt_free(recv_data);
            return;
        }

/* 有接收到数据，把末端清零 */
        recv_data[bytes_received] = '\0';
        if (strcmp(recv_data, "q") == 0 || strcmp(recv_data, "Q") == 0)
        {
            /* 如果是首字母是q或Q，关闭这个连接 */
            closesocket(*connected);
            rt_free(connected);
             rt_free(recv_data);
            return;
        }
        else if (strcmp(recv_data, "exit") == 0)
        {
            /* 如果接收的是exit，则关闭整个服务端 */
            closesocket(*connected);
            rt_free(connected);
             rt_free(recv_data);
            return;
        }
        else
        {
            /* 在控制终端显示收到的数据 */
            //rt_kprintf("RECEIVED DATA = %s \n", recv_data);
             /* 发送数据到connected socket */
            ret = send(*connected, recv_data, bytes_received, 0);
            
            if (ret < 0)
            {
                /* 发送失败，关闭这个连接 */
                closesocket(*connected);
                rt_free(connected);
                 rt_free(recv_data);
                rt_kprintf("\nsend error,close the socket.\r\n");
                return;
            }
            else if (ret == 0)
            {
                /* 打印send函数返回值为0的警告信息 */
                rt_kprintf("\n Send warning,send function return 0.\r\n");
            }
        }
    }
}
    
static void rt_tcpserv_thread_entry(void *parameter)
{
     int opt = 1;
    socklen_t sin_size;
    int sock;
    char name[10];
    rt_thread_t client_thread;
    int *socket_client;
    struct sockaddr_in server_addr, client_addr;
    rt_bool_t stop = RT_FALSE; /* 停止标志 */

/* 一个socket在使用前，需要预先创建出来，指定SOCK_STREAM为TCP的socket */
    if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)
    {
        /* 创建失败的错误处理 */
        rt_kprintf("Socket error\n");
        return;
    }

/* 初始化服务端地址 */
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(20108); /* 服务端工作的端口 */
    server_addr.sin_addr.s_addr = htons(INADDR_ANY);
    rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero));

/* 绑定socket到服务端地址 */
    if (bind(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1)
    {
        /* 绑定失败 */
        rt_kprintf("Unable to bind\n");

return;
    }

/* 在socket上进行监听 */
    if (listen(sock, 5) == -1)
    {
        rt_kprintf("Listen error\n");

/* release recv buffer */
        return;
    }

rt_kprintf("\nTCPServer Waiting for client on port 5000...\n");
    while (stop != RT_TRUE)
    {
        sin_size = sizeof(struct sockaddr_in);
        socket_client=rt_malloc(sizeof(int)); 
        /* 接受一个客户端连接socket的请求，这个函数调用是阻塞式的 */
        *socket_client = accept(sock, (struct sockaddr *)&client_addr, &sin_size);
        
        /* 返回的是连接成功的socket */
        if (*socket_client < 0)
        {
            rt_free(socket_client);
            rt_kprintf("accept connection failed! errno = %d\n", errno);
            continue;
        }
        setsockopt(*socket_client, SOL_SOCKET, SO_KEEPALIVE, &opt, sizeof(int));
        /* 接受返回的client_addr指向了客户端的地址信息 */
        rt_kprintf("I got a connection from (%s , %d)\n",
                   inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));
        sprintf(name,"client_%d",*socket_client);
        client_thread = rt_thread_create(name,
                                   rt_tcpclientthread_entry, (int *)socket_client,
                                   4096, 15, 20);
        rt_thread_startup(client_thread);
            
    }
}
int main(void)
{
	rt_thread_t tcpserv_thread;
	 tcpserv_thread = rt_thread_create("socket_server",
		   rt_tcpserv_thread_entry, RT_NULL,
		   4096, 20, 20);
	if (tcpserv_thread != RT_NULL)
        rt_thread_startup(tcpserv_thread);
	return 0;
}

bernard 2019-04-27

这家伙很懒，什么也没写！

xiaoqi 2019-04-27

这家伙很懒，什么也没写！

>注意下，如果是H7，底层驱动是需要考虑cache的。stm32f4平台的，后面会进行测试下
> ...

---

解决了，把网卡接收函数改了一下没再出现这个问题，具体为啥我还是不太清楚，屏蔽掉的是原来rtt自带的，下面那一段是我自己加上的，测了三四个小时了，没再出现那个问题
/* reception packet. */
struct pbuf *rt_lan8742_rx(rt_device_t dev)
{
	struct pbuf* p = RT_NULL,*q;
	ETH_BufferTypeDef RxBuff;
	uint32_t framelength = 0;
	uint32_t curr_len=0;
    /* lock LAN8742 device */
    rt_sem_take(&sem_lock, RT_WAITING_FOREVER);
	
	/* Clean and Invalidate data cache */
	SCB_CleanInvalidateDCache();

if(HAL_ETH_GetRxDataBuffer(&EthHandle, &RxBuff) == HAL_OK) 
	{
//		HAL_ETH_GetRxDataLength(&EthHandle, &framelength);
//		p = pbuf_alloced_custom(PBUF_RAW, framelength, PBUF_POOL, &rx_pbuf[current_pbuf_idx], RxBuff.buffer, framelength);

//		if(current_pbuf_idx < (ETH_RX_DESC_CNT -1))
//		{
//			current_pbuf_idx++;
//		}
//		else
//		{
//			current_pbuf_idx = 0;
//		}
		
		HAL_ETH_GetRxDataLength(&EthHandle, &framelength);
		if(framelength!=0)
		{
			p = pbuf_alloc(PBUF_TRANSPORT, framelength, PBUF_RAM);//申请存储空间
			if(p != NULL)
			{
				q = p;
				while(q != NULL) 
				{
					memcpy(q->payload,RxBuff.buffer+curr_len,q->len);
					curr_len+=q->len;
					q=q->next;
				}
			}
		}
	}
	HAL_ETH_BuildRxDescriptors(&EthHandle);
	
    /* unlock LAN8742 device */
    rt_sem_release(&sem_lock);

return p;
}