rt-thread udp tcp 代码转载

最近发现不止一个人再要基于 RT-Thread 的 TCP 和 UDP 示例代码，包括 SAL 方式的。

这里给出一个我自己写的示例程序吧，希望可以帮到需要的人。

代码一键下载地址，点我。

/*
* Copyright (c) 2006-2019, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-07-09 MurphyZhao first version
*/

#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <stdlib.h>

#include <rtthread.h>

#ifdef RT_USING_SAL

#include <sys/socket.h>
#include <netdb.h>
#include "sal_tls.h"
#include "sys/time.h"
#else

#include "lwip/sockets.h"
#include "lwip/netdb.h"
#include "lwip/sys.h"
#include "lwip/inet.h"

#endif /* RT_USING_SAL */

#define LOG_TAG "demo.tcp"
#define LOG_LVL LOG_LVL_DBG
#include <ulog.h>

#define TCP_TEST_HOST "www.rt-thread.com"
#define TCP_TEST_PORT (80u)

#define TEST_BUFSZ (1024u)

static const char *req_data = "GET /service/rt-thread.txt HTTP/1.1\r\n"
"Host: www.rt-thread.com\r\n"
"User-Agent: rtthread/4.0.1 rtt\r\n\r\n";

static char req_uri[128];
static int req_port;

static void nb_tcp_demo(int argc, char** argv)
{
int ret;

int sock = -1;
struct hostent *host;
struct sockaddr_in server_addr;
int bytes_received;
char *recv_data;

char ip_addr_buf[64];

if ((argc != 1) && (argc != 3))
{
LOG_E("In param error");
LOG_I("cmd: demo_tcp [<host> <port>]");
LOG_I("eg: demo_tcp");
LOG_I(" demo_tcp 127.0.0.1 8080");
return;
}

rt_memset(req_uri, 0x0, sizeof(req_uri));

if (argc == 3)
{
rt_strncpy(req_uri, argv[1], rt_strlen(argv[1]));
req_port = atoi(argv[2]);
}
else
{
rt_strncpy(req_uri, TCP_TEST_HOST, rt_strlen(TCP_TEST_HOST));
req_port = TCP_TEST_PORT;
}

LOG_I("TCP demo start");

LOG_I("Host:%s; Port:%d", req_uri, req_port);

LOG_D("will gethostbyname...");
host = gethostbyname(req_uri);
if (!host)
{
LOG_E("gethostbyname failed!");
return;
}

LOG_I("gethostbyname pass. ip addr: %s", inet_ntoa_r(*((struct in_addr *)host->h_addr_list[0]), ip_addr_buf, sizeof(ip_addr_buf)));

recv_data = rt_calloc(1, TEST_BUFSZ);
if (recv_data == RT_NULL)
{
LOG_E("calloc failed. No memory!");
return;
}

if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
LOG_E("Create socket failed!");
goto __exit;
}

server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(req_port);
server_addr.sin_addr = *((struct in_addr *)host->h_addr);
rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero));

if ((ret = connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr))) < 0)
{
LOG_E("Connect <%d> fail! ret:%d", sock, ret);
goto __exit;
}
LOG_I("connect <%s> success", ip_addr_buf);

ret = send(sock, req_data, strlen(req_data), 0);
if (ret <= 0)
{
LOG_E("send error, will close the socket <%d>.", sock);
goto __exit;
}
LOG_I("send success");

bytes_received = recv(sock, recv_data, TEST_BUFSZ - 1, 0);
if (bytes_received <= 0)
{
LOG_E("receive error, will close the socket <%d>.", sock);
goto __exit;
}

LOG_I("received data:\n");
for (int i = 0; i < bytes_received; i++)
{
rt_kprintf("%c", recv_data[i]);
}
rt_kprintf("\r\n");

__exit:
if (recv_data)
rt_free(recv_data);

if (sock >= 0)
{
closesocket(sock);
sock = -1;
}

LOG_I("TCP demo end");
}
#ifdef FINSH_USING_MSH
#include <finsh.h>
MSH_CMD_EXPORT_ALIAS(nb_tcp_demo, demo_tcp, nbiot tcp test);
#endif /* FINSH_USING_MSH */

//udp

/*
* Copyright (c) 2006-2019, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-07-09 MurphyZhao first version
*/

#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <stdlib.h>

#include <rtthread.h>

#ifdef RT_USING_SAL

#include <sys/socket.h>
#include <netdb.h>
#include "sal_tls.h"
#include "sys/time.h"
#else

#include "lwip/sockets.h"
#include "lwip/netdb.h"
#include "lwip/sys.h"
#include "lwip/inet.h"

#endif /* RT_USING_SAL */

#define LOG_TAG "demo.udp"
#define LOG_LVL LOG_LVL_DBG
#include <ulog.h>

#define TCP_TEST_HOST "114.116.144.151"
#define TCP_TEST_PORT (2010u)

#define TEST_BUFSZ (1024u)

static const char *req_data = "This message is from NB-IOT UDP Client with RT-Thread.\n";
static char req_uri[128];
static int req_port;

static void nb_udp_demo(int argc, char** argv)
{
int ret;

int sock = -1;
struct hostent *host;
struct sockaddr_in server_addr;
char *recv_data;
int bytes_received;

char ip_addr_buf[64];

LOG_I("UDP demo start");

if ((argc != 1) && (argc != 3))
{
LOG_E("In param error");
LOG_I("cmd: demo_udp [<host> <port>]");
LOG_I("eg: demo_udp");
LOG_I(" demo_udp 127.0.0.1 8080");
return;
}