关于SAL的tcpclient无法连接问题

发布于 2018-09-07 19:23:17 浏览：2401 订阅该版

at_ping 可以通，但socket无法连接上，使用的标准的示例程序
错误提示：
msh />tcpclient mcubuilder.imwork.net 7778
[E/AT] execute command (AT+CIPSTART=0,"TCP","0.0.0.0",59260,60) failed!
[D/AT] socket (0) connect failed, maybe the socket was not be closed at the last time and now will retry.
[E/AT] execute command (AT+CIPCLOSE=0) failed!
[E/AT_SOC] AT socket(0) connect failed!
Connect fail!
msh />at_ping mcubuilder.imwork.net
32 bytes from mcubuilder.imwork.net icmp_seq=1 time=1 ms
32 bytes from mcubuilder.imwork.net icmp_seq=2 time=1 ms
32 bytes from mcubuilder.imwork.net icmp_seq=3 time=1 ms
32 bytes from mcubuilder.imwork.net icmp_seq=4 time=1 ms

/* 创建一个socket，类型是SOCKET_STREAM，TCP类型 */
    if ((sock = socket(AF_AT, SOCK_STREAM, 0)) == -1)
    {
        /* 创建socket失败 */
        rt_kprintf("Socket error<br>");

/* 释放接收缓冲 */
        rt_free(recv_data);
        return;
    }

/* 初始化预连接的服务端地址 */
    server_addr.sin_family = AF_AT;    //这里是不是需要修改？   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));