40 NB-IOT模块BC28在socket上进行监听失败

发布于 2022-09-27 17:39:14 浏览：655 订阅该版

[tocm]

# 一、BC28初始化完成，联网完成

```c
[I/at.dev.bc28] bc28 device network initialize success.

```

![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20220927/cf06cf463383e6ae2d1780a0e889d204.png)
# 二、获取网卡对象，没有提示失败

```c
netdev = netdev_get_by_name("bc28");
if (netdev == RT_NULL)
{
	rt_kprintf("get network interface device(%s) failed.\n", "bc28");
}
```
# 三、创建socket，没有提示失败

```c
if ((sock = socket(AF_AT, SOCK_STREAM, 0)) == -1)
{
/* 创建失败的错误处理 */
	LOG_E("Socket error\n");
	return;
}
```
# 四、绑定socket到服务器，没有提示失败

```c
    server_addr.sin_family = AF_AT;
    server_addr.sin_port = htons(2404); /* 服务端工作的端口 */
//    server_addr.sin_addr.s_addr = INADDR_ANY;
    server_addr.sin_addr.s_addr = netdev->ip_addr.addr;
    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 */
        LOG_E("Unable to bind\n");
        return;
    }
```
# 五、在socket上进行监听，返回-1，失败

```c
    if (listen(sock, 2) == -1)
    {
        LOG_E("Listen error\n");
        return;
    }
```
# 六、调试

![sal_listen.png](https://oss-club.rt-thread.org/uploads/20220927/76b2c27502a149fe94e2fbcccf80251a.png "sal_listen.png")