69 lines
1.4 KiB
C
69 lines
1.4 KiB
C
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#include <lwip/api.h>
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#define TCP_ECHO_PORT 7
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void tcpecho_entry(void *parameter)
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{
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struct netconn *conn, *newconn;
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err_t err;
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/* Create a new connection identifier. */
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conn = netconn_new(NETCONN_TCP);
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/* Bind connection to well known port number 7. */
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netconn_bind(conn, NULL, TCP_ECHO_PORT);
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/* Tell connection to go into listening mode. */
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netconn_listen(conn);
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while(1)
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{
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/* Grab new connection. */
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newconn = netconn_accept(conn);
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/* Process the new connection. */
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if(newconn != NULL)
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{
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struct netbuf *buf;
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void *data;
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u16_t len;
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while((buf = netconn_recv(newconn)) != NULL)
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{
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do
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{
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netbuf_data(buf, &data, &len);
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err = netconn_write(newconn, data, len, NETCONN_COPY);
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if(err != ERR_OK){}
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}
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while(netbuf_next(buf) >= 0);
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netbuf_delete(buf);
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}
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/* Close connection and discard connection identifier. */
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netconn_delete(newconn);
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}
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}
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}
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#ifdef RT_USING_FINSH
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#include <finsh.h>
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static rt_thread_t echo_tid = RT_NULL;
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void tcpecho(rt_uint32_t startup)
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{
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if (startup && echo_tid == RT_NULL)
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{
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echo_tid = rt_thread_create("echo",
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tcpecho_entry, RT_NULL,
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512, 30, 5);
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if (echo_tid != RT_NULL)
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rt_thread_startup(echo_tid);
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}
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else
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{
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if (echo_tid != RT_NULL)
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rt_thread_delete(echo_tid); /* delete thread */
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echo_tid = RT_NULL;
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}
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}
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FINSH_FUNCTION_EXPORT(tcpecho, startup or stop TCP echo server);
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#endif
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