204 lines
4.1 KiB
C
204 lines
4.1 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2023-05-30 murmur the first version
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*/
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#include <rtthread.h>
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#include <sys/socket.h> /* 使用BSD socket，需要包含socket.h头文件 */
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#include <netdb.h>
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#include <string.h>
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#define LOG_TAG "ttTR"
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#define LOG_LVL LOG_LVL_INFO
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#include <ulog.h>
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#define BUFSZ 1024
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#define RETRYCNT 10
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#define URL "http://192.168.0.232"
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#define PORT 8005
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int sock=0;
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static void tcpClose(void)
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{
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/* 关闭这个连接 */
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if (sock) {
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closesocket(sock);
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}
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}
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static int tcpInit(void)
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{
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int ret;
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const char *url = URL;
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int port = PORT;
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/* 通过函数入口参数url获得host地址（如果是域名，会做域名解析） */
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struct hostent *host;
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host = gethostbyname(url);
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/* 创建一个socket，类型是SOCKET_STREAM，TCP类型 */
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if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)
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{
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/* 创建socket失败 */
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LOG_E("Socket error");
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return RT_ERROR;
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}
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/* 初始化预连接的服务端地址 */
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struct sockaddr_in server_addr;
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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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/* 连接到服务端 */
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if (connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1)
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{
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/* 连接失败 */
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LOG_E("Connect fail!\n");
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tcpClose();
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return RT_ERROR;
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}
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else {
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return RT_EOK;
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}
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}
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static int tcpSend(const rt_uint8_t *send_data, size_t len)
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{
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/* 发送数据到sock连接 */
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int ret = send(sock, send_data, len, 0);
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if (ret == len)
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{
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ret = RT_EOK;
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}
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else
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{
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LOG_E("Send error, send function return %d", ret);
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ret = RT_ERROR;
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}
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return ret;
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}
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static int tcpRec()
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{
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/* 分配用于存放接收数据的缓冲 */
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char *recv_data;
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recv_data = rt_malloc(BUFSZ);
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if (recv_data == RT_NULL)
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{
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LOG_E("No memory.");
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return RT_ENOMEM;
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}
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int ret=RT_ERROR;
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size_t cnt = RETRYCNT;//尝试次数
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while (cnt--)
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{
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/* 从sock连接中接收最大BUFSZ - 1字节数据 */
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int bytes_received = recv(sock, recv_data, BUFSZ - 1, 0);
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if (bytes_received) {
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LOG_HEX("rec data",16,recv_data,bytes_received);
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//check response
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rt_uint8_t rec_good[] = { 0x88, 0xAA, 0xBB, 0x88 };//前四字节
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if (rt_memcmp(recv_data, rec_good, 4))
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{
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ret = RT_EOK;
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/* 释放接收缓冲 */
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rt_free(recv_data);
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break;
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}
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}
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else {
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LOG_E("received error.");
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/* 释放接收缓冲 */
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rt_free(recv_data);
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break;
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}
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rt_thread_delay(100);
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}
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return ret;
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}
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/**
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* 发送一维数组
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* @param msg 待发数据
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* @param len 数组长度
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* @return 成功返回0
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*/
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int sendMsg(const rt_uint8_t *msg, size_t len)
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{
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if (tcpInit() != RT_EOK)
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{
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return RT_ERROR;
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}
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if (tcpSend(msg, len) != RT_EOK)
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{
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tcpClose();
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return RT_ERROR;
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}
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if (tcpRec() != RT_EOK)
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{
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tcpClose();
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return RT_ERROR;
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};
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tcpClose();
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return RT_EOK;
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}
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/**
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* 发送二维数组
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* @param msg 待发二维数组
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* @param s 各纬度数组长度
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* @param row 数组长度
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* @return 成功返回0
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*/
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int sendMsgs(const rt_uint8_t (*msg)[200], char *s, size_t row)
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{
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if (tcpInit() != RT_EOK)
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{
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return RT_ERROR;
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}
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for (size_t var = 0; var < row; var++)
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{
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if (tcpSend(msg[var], s[row]) != RT_EOK)
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{
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tcpClose();
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return RT_ERROR;
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}
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if (tcpRec() != RT_EOK)
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{
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tcpClose();
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return RT_ERROR;
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};
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}
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tcpClose();
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return RT_EOK;
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}
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