82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
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#include <rtthread.h>
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#include <lwip/netdb.h>
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#include <lwip/sockets.h>
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static const char send_data[] = "This is TCP Client from RT-Thread.";
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void tcpclient(const char* url, int port)
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{
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char *recv_data;
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struct hostent *host;
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int sock, bytes_received;
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struct sockaddr_in server_addr;
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host = gethostbyname(url);
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recv_data = rt_malloc(1024);
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if (recv_data == RT_NULL)
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{
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rt_kprintf("No memory\n");
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return;
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}
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if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)
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{
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rt_kprintf("Socket error\n");
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/* release recv buffer */
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rt_free(recv_data);
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return;
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}
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server_addr.sin_family = AF_INET;
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server_addr.sin_port = htons(port);
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server_addr.sin_addr = *((struct in_addr *)host->h_addr);
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rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero));
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if (connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1)
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{
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rt_kprintf("Connect error\n");
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/* release recv buffer */
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rt_free(recv_data);
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return;
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}
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while(1)
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{
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bytes_received = recv(sock, recv_data, 1024, 0);
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if (bytes_received < 0)
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{
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lwip_close(sock);
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/* release recv buffer */
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rt_free(recv_data);
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break;
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}
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recv_data[bytes_received] = '\0';
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if (strcmp(recv_data , "q") == 0 || strcmp(recv_data , "Q") == 0)
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{
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lwip_close(sock);
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/* release recv buffer */
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rt_free(recv_data);
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break;
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}
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else
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{
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rt_kprintf("\nRecieved data = %s " , recv_data);
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}
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send(sock,send_data,strlen(send_data), 0);
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}
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return;
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}
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#ifdef RT_USING_FINSH
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#include <finsh.h>
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FINSH_FUNCTION_EXPORT(tcpclient, startup tcp client);
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#endif
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