Function tcpecho_entry

examples/test/net_test.c:138–196

#define TCP_ECHO_PORT   7
rt_thread_t tcpecho_tid = RT_NULL;
void tcpecho_entry(void *parameter)
{
    struct netconn *conn, *newconn;
    err_t err;

    /* Create a new connection identifier. */
    conn = netconn_new(NETCONN_TCP);
    if(conn == NULL)
    {
        rt_kprintf("no memory error\n");
        return;
    }

    /* Bind connection to well known port number 7. */
    netconn_bind(conn, NULL, TCP_ECHO_PORT);

    /* Tell connection to go into listening mode. */
    netconn_listen(conn);

    while(1)
    {
        /* Grab new connection. */
#if LWIP_VERSION_MINOR==3U
        newconn = netconn_accept(conn);
        if(newconn != NULL)
#else
        err = netconn_accept(conn, &newconn);
        if(err == ERR_OK)
#endif
        /* Process the new connection. */
        {
            struct netbuf *buf;
            void *data;
            u16_t len;
#if LWIP_VERSION_MINOR==3U
            while((buf = netconn_recv(newconn)) != NULL)
#else
            while((err = netconn_recv(newconn, &buf)) == ERR_OK)
#endif
            {
                do
                {
                    netbuf_data(buf, &data, &len);
                    err = netconn_write(newconn, data, len, NETCONN_COPY);
                    if(err != ERR_OK)
                    {
                        break;
                    }
                }while(netbuf_next(buf) >= 0);

                netbuf_delete(buf);
            }
            /* Close connection and discard connection identifier. */
            netconn_delete(newconn);
        }
    }

    netconn_delete(conn);