RTT升级加netdev 相关问题

发布于 2019-04-22 10:05:13 浏览：2574 订阅该版

[tocm]

# RTT升级 加netdev 相关问题

首先是更新 esp8266 的包， 出错 提示没有 netdev, 就去更新了内核，尤其是 直接使用了 ping 等   netutils 小工具。不过编译时出了一些问题。

## 1. lwip 2.1.0 / 2.0 2 编译出错

```
CC build\kernel\components\libc\time\posix_sleep.o
CC build\kernel\components et\lwip-2.1.0\src etif\ethernetif.o
CC build\kernel\components et etdev\src etdev.o
CC build\kernel\components et etdev\src etdev_ipaddr.o
CC build\kernel\components et\sal_socket\dfs_net\dfs_net.o
F:\Loongson-Smartloong-V3.0-RTT\components et\lwip-2.1.0\src etif\ethernetif.c: In function 'lwip_netdev_ping':
F:\Loongson-Smartloong-V3.0-RTT\components et\lwip-2.1.0\src etif\ethernetif.c:211:45: error: 'IP_PROTO_ICMP' undeclared (first use in this function)
 if ((s = lwip_socket(AF_INET, SOCK_RAW, IP_PROTO_ICMP)) < 0)
 ^
F:\Loongson-Smartloong-V3.0-RTT\components et\lwip-2.1.0\src etif\ethernetif.c:211:45: note: each undeclared identifier is reported only once for each function it appears in
scons: *** [build\kernel\components et\lwip-2.1.0\src etif\ethernetif.o] Error 1
scons: building terminated because of errors.
```

如果修改成 lwip1.4.1, 则正常编译。

在 components et\lwip-2.1.0\src etif\ethernetif.c 中添加语句
```
#include "lwip/ip.h"
```
解决该问题。

## 2. AT esp8266 中的问题
- **首先是 at_ping 的命令** 更换成了 **ping**.
- 在配置好一切后，无线的网络和密码，自动初始化联网，发现无法 ping 通，打开调试信息和 raw 后，卡在以下位置：
[查看卡住时的运行位置在AT+CIPMUX处](![at 调试成功.png](/uploads/201904/22/095728gbdsl7cqztqzqabc.png))
在发送 ```AT+CIPSTA?```命令时，回复 的MAC地址为空，于是将 文件 at_socket_esp8266.c中的以下语句 ```sscanf(mac ......```注释：
```
    /* set netdev info */
    inet_aton(ip, &sal_ip_addr);
    netdev_low_level_set_ipaddr(netdev, &sal_ip_addr);
    inet_aton(gateway, &sal_ip_addr);
    netdev_low_level_set_gw(netdev, &sal_ip_addr);
    inet_aton(netmask, &sal_ip_addr);
    netdev_low_level_set_netmask(netdev, &sal_ip_addr);
    //sscanf(mac, "%x:%x:%x:%x:%x:%x", (rt_uint32_t *)&mac_addr[0], (rt_uint32_t *)&mac_addr[1], (rt_uint32_t *)&mac_addr[2], (rt_uint32_t *)&mac_addr[3], (rt_uint32_t *)&mac_addr[4], (rt_uint32_t *)&mac_addr[5]);
    memcpy(netdev->hwaddr, (const void *)mac_addr, netdev->hwaddr_len);
```
- 现在一切风平浪静了。

## 3. at webclient 示例
将 tcpclient.c 适当修改，使用 at socket 去联网。
```
#include <rtthread.h>
#include <string.h>

#if !defined(SAL_USING_POSIX)
#error "Please enable SAL_USING_POSIX!"
#else
#include <sys/time.h>
#include <sys/select.h>
#endif
#include <sys/socket.h> /* 使用BSD socket，需要包含socket.h头文件 */
#include "netdb.h"

#define DEBUG_TCP_CLIENT

#define DBG_TAG "TCP"
#ifdef DEBUG_TCP_CLIENT
#define DBG_LVL DBG_LOG
#else
#define DBG_LVL DBG_INFO /* DBG_ERROR */
#endif
#include <rtdbg.h>

#define BUFSZ   1024

static int started = 0;
static int is_running = 0;
static char url[256];
static int port = 8080;
static const char send_data[] = "This is TCP Client from RT-Thread."; /* 发送用到的数据 */

static void tcpclient(void *arg)
{
    int ret;
    char *recv_data;
    int bytes_received;
    int sock = -1;
    struct hostent *host = RT_NULL;
    struct sockaddr_in server_addr;

struct timeval timeout;
    fd_set readset;

/* 通过函数入口参数url获得host地址（如果是域名，会做域名解析） */
    host = gethostbyname(url);
    if (host == RT_NULL)
    {
        LOG_E("Get host by name failed!");
        return;
    }

/* 分配用于存放接收数据的缓冲 */
    recv_data = rt_malloc(BUFSZ);
    if (recv_data == RT_NULL)
    {
        LOG_E("No memory");
        return;
    }

/* 创建一个socket，类型是SOCKET_STREAM，TCP类型 */
    if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)
    {
        /* 创建socket失败 */
        LOG_E("Create socket error");
        goto __exit;
    }

/* 初始化预连接的服务端地址 */
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(port);
    server_addr.sin_addr = *((struct in_addr *)host->h_addr);
    rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero));

/* 连接到服务端 */
    if (connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1)
    {
        /* 连接失败 */
        LOG_E("Connect fail!");
        goto __exit;
    }
    started = 1;
    is_running = 1;

timeout.tv_sec = 3;
    timeout.tv_usec = 0;

while (is_running)
    {
        FD_ZERO(&readset);
        FD_SET(sock, &readset);

/* Wait for read */
        if (select(sock + 1, &readset, RT_NULL, RT_NULL, &timeout) == 0)
            continue;

/* 从sock连接中接收最大BUFSZ - 1字节数据 */
 bytes_received = recv(sock, recv_data, BUFSZ - 1, 0);
 if (bytes_received < 0)
 {
 /* 接收失败，关闭这个连接 */
 LOG_E("Received error, close the socket.");
 goto __exit;
 }
 else if (bytes_received == 0)
 {
 /* 打印recv函数返回值为0的警告信息 */
 LOG_W("Received warning, recv function return 0.");
 continue;
 }
 else
 {
 /* 有接收到数据，把末端清零 */
 recv_data[bytes_received] = '\0';

if (rt_strcmp(recv_data, "q") == 0 || rt_strcmp(recv_data, "Q") == 0)
            {
                /* 如果是首字母是q或Q，关闭这个连接 */
                LOG_I("Got a 'q' or 'Q', close the socket.");
                goto __exit;
            }
            else
            {
                /* 在控制终端显示收到的数据 */
                LOG_D("Received data = %s", recv_data);
            }
        }

/* 发送数据到sock连接 */
 ret = send(sock, send_data, rt_strlen(send_data), 0);
 if (ret < 0)
 {
 /* 接收失败，关闭这个连接 */
 LOG_I("send error, close the socket.");
 goto __exit;
 }
 else if (ret == 0)
 {
 /* 打印send函数返回值为0的警告信息 */
 LOG_W("Send warning, send function return 0.");
 }
 }

__exit:
    if (recv_data)
    {
        rt_free(recv_data);
        recv_data = RT_NULL;
    }
    if (sock >= 0)
    {
        closesocket(sock);
        sock = -1;
    }
    started = 0;
    is_running = 0;
    return;
}

static void usage(void)
{
 rt_kprintf("Usage: attcpclient -h <host> -p <port> ");
 rt_kprintf(" attcpclient --stop ");
 rt_kprintf(" attcpclient --help ");
 rt_kprintf(" ");
 rt_kprintf("Miscellaneous: ");
 rt_kprintf(" -h Specify host address ");
 rt_kprintf(" -p Specify the host port number ");
 rt_kprintf(" --stop Stop tcpclient program ");
 rt_kprintf(" --help Print help information ");
}

static void at_tcp_client_test(int argc, char** argv)
{
    rt_thread_t tid;

if (argc == 1 || argc > 5)
 {
 LOG_I("Please check the command you entered! ");
 goto __usage;
 }
 else
 {
 if (rt_strcmp(argv[1], "--help") == 0)
 {
 goto __usage;
 }
 else if (rt_strcmp(argv[1], "--stop") == 0)
 {
 is_running = 0;
 return;
 }
 else if (rt_strcmp(argv[1], "-h") == 0 && rt_strcmp(argv[3], "-p") == 0)
 {
 if (started)
 {
 LOG_I("The tcpclient has started!");
 LOG_I("Please stop tcpclient firstly, by: tcpclient --stop");
 return;
 }

if (rt_strlen(argv[2]) > sizeof(url))
            {
                LOG_E("The input url is too long, max %d bytes!", sizeof(url));
                return;
            }
            rt_memset(url, 0x0, sizeof(url));
            rt_strncpy(url, argv[2], rt_strlen(argv[2]));
            port = atoi(argv[4]);
        }
        else
        {
            goto __usage;
        }
    }
    
    tid = rt_thread_create("at_client",
        tcpclient, RT_NULL,
        2048, RT_THREAD_PRIORITY_MAX/3, 10);
    if (tid != RT_NULL)
    {
        rt_thread_startup(tid);
    }

return;

__usage:
    usage();
}

#ifdef RT_USING_FINSH
MSH_CMD_EXPORT_ALIAS(at_tcp_client_test, attcpclient,
    Start a at tcp client. Help: attcpclient --help);
#endif
```

在 msh 中运行以下命令：
```
attcpclient -h 221.***.***.*** -p ***  //联网

attcpclient --stop //断网

attcpclient --help //帮助
```

运行结果如下图：
[at调试成功](![查看卡住时的运行位置在AT+CIPMUX处.png](/uploads/201904/22/095728tioifdyot88ys5bd.png)）