57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
#include <lwip/api.h>
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#define UDP_ECHO_PORT 7
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void udpecho_entry(void *parameter)
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{
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struct netconn *conn;
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struct netbuf *buf;
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struct ip_addr *addr;
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unsigned short port;
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conn = netconn_new(NETCONN_UDP);
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netconn_bind(conn, IP_ADDR_ANY, 7);
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while(1)
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{
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/* received data to buffer */
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buf = netconn_recv(conn);
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addr = netbuf_fromaddr(buf);
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port = netbuf_fromport(buf);
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/* send the data to buffer */
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netconn_connect(conn, addr, port);
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/* reset address, and send to client */
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buf->addr = RT_NULL;
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netconn_send(conn, buf);
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/* release buffer */
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netbuf_delete(buf);
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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 udpecho(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("uecho",
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udpecho_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(udpecho, startup or stop UDP echo server);
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#endif
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