使用netconn同时处理多个LwIP连接

我的代码基于ST echo服务器示例,如下所示

void myTaskStart(void const * argument)
{
    struct netconn *conn, *newconn;
    err_t err, accept_err;
    struct netbuf* buf;
    void* data;
    u16_t len;
    err_t recv_err;

    /* Create a new connection identifier. */
    conn = netconn_new(NETCONN_TCP);
    if (conn != NULL)
    {
        err = netconn_bind(conn, NULL, <some port>);

        if (err == ERR_OK)
        {
            /* Tell connection to go into listening mode. */
            netconn_listen(conn);

            while (1)
            {
                /* Grab new connection. */
                accept_err = netconn_accept(conn, &newconn);

                /* Process the new connection. */
                if (accept_err == ERR_OK)
                {
                        <do stuff here>

                    netconn_close(newconn);
                    netconn_delete(newconn);
                }
            }
        }
        else
        {
            netconn_delete(newconn);
            printf(" can not bind TCP netconn");
        }
    }
    else
    {
        printf("can not create TCP netconn");
    }
}

netconn_accept .它返回 ERR_ABRT a connection has been aborted: out of pcbs or out of netconns during accept .