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[examples][network] 更新 tcp client & server 例程
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Signed-off-by: MurphyZhao <[email protected]>
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@murphyzhao
murphyzhao committed Nov 5, 2018
1 parent c7d9dae commit 6c62f5d
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Showing 2 changed files with 344 additions and 121 deletions.
211 changes: 161 additions & 50 deletions examples/network/tcpclient.c
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Original file line number Diff line number Diff line change
@@ -1,39 +1,69 @@
#include <rtthread.h>
#include <string.h>

#if !defined(SAL_USING_POSIX)
#error "Please enable SAL_USING_POSIX!"
#else
#include <sys/time.h>
#include <sys/select.h>
#endif
#include <sys/socket.h> /* 使用BSD socket，需要包含socket.h头文件 */
#include "netdb.h"

#define DEBUG_TCP_CLIENT

#define DBG_ENABLE
#define DBG_SECTION_NAME "TCP"
#ifdef DEBUG_TCP_CLIENT
#define DBG_LEVEL DBG_LOG
#else
#define DBG_LEVEL DBG_INFO /* DBG_ERROR */
#endif
#define DBG_COLOR
#include <rtdbg.h>

#define BUFSZ 1024

static int started = 0;
static int is_running = 0;
static char url[256];
static int port = 8080;
static const char send_data[] = "This is TCP Client from RT-Thread."; /* 发送用到的数据 */
void tcpclient(const char *url, int port)

static void tcpclient(void *arg)
{
int ret;
char *recv_data;
struct hostent *host;
int sock, bytes_received;
int bytes_received;
int sock = -1;
struct hostent *host = RT_NULL;
struct sockaddr_in server_addr;

struct timeval timeout;
fd_set readset;

/* 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） */
host = gethostbyname(url);
if (host == RT_NULL)
{
LOG_E("Get host by name failed!");
return;
}

/* 分配用于存放接收数据的缓冲 */
recv_data = rt_malloc(BUFSZ);
if (recv_data == RT_NULL)
{
rt_kprintf("No memory\n");
LOG_E("No memory");
return;
}

/* 创建一个socket，类型是SOCKET_STREAM，TCP类型 */
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
/* 创建socket失败 */
rt_kprintf("Socket error\n");

/* 释放接收缓冲 */
rt_free(recv_data);
return;
LOG_E("Create socket error");
goto __exit;
}

/* 初始化预连接的服务端地址 */
Expand All @@ -46,78 +76,159 @@ void tcpclient(const char *url, int port)
if (connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1)
{
/* 连接失败 */
rt_kprintf("Connect fail!\n");
closesocket(sock);

/*释放接收缓冲 */
rt_free(recv_data);
return;
LOG_E("Connect fail!");
goto __exit;
}

while (1)
started = 1;
is_running = 1;

timeout.tv_sec = 3;
timeout.tv_usec = 0;

while (is_running)
{
FD_ZERO(&readset);
FD_SET(sock, &readset);

/* Wait for read */
if (select(sock + 1, &readset, RT_NULL, RT_NULL, &timeout) == 0)
continue;

/* 从sock连接中接收最大BUFSZ - 1字节数据 */
bytes_received = recv(sock, recv_data, BUFSZ - 1, 0);
if (bytes_received < 0)
{
/* 接收失败，关闭这个连接 */
closesocket(sock);
rt_kprintf("\nreceived error,close the socket.\r\n");

/* 释放接收缓冲 */
rt_free(recv_data);
break;
LOG_E("Received error, close the socket.");
goto __exit;
}
else if (bytes_received == 0)
{
/* 打印recv函数返回值为0的警告信息 */
rt_kprintf("\nReceived warning,recv function return 0.\r\n");

LOG_W("Received warning, recv function return 0.");
continue;
}

/* 有接收到数据，把末端清零 */
recv_data[bytes_received] = '\0';

if (strcmp(recv_data, "q") == 0 || strcmp(recv_data, "Q") == 0)
{
/* 如果是首字母是q或Q，关闭这个连接 */
closesocket(sock);
rt_kprintf("\n got a 'q' or 'Q',close the socket.\r\n");

/* 释放接收缓冲 */
rt_free(recv_data);
break;
}
else
{
/* 在控制终端显示收到的数据 */
rt_kprintf("\nReceived data = %s ", recv_data);
/* 有接收到数据，把末端清零 */
recv_data[bytes_received] = '\0';

if (rt_strcmp(recv_data, "q") == 0 || rt_strcmp(recv_data, "Q") == 0)
{
/* 如果是首字母是q或Q，关闭这个连接 */
LOG_I("Got a 'q' or 'Q', close the socket.");
goto __exit;
}
else
{
/* 在控制终端显示收到的数据 */
LOG_D("Received data = %s", recv_data);
}
}

/* 发送数据到sock连接 */
ret = send(sock, send_data, strlen(send_data), 0);
ret = send(sock, send_data, rt_strlen(send_data), 0);
if (ret < 0)
{
/* 接收失败，关闭这个连接 */
closesocket(sock);
rt_kprintf("\nsend error,close the socket.\r\n");

rt_free(recv_data);
break;
LOG_I("send error, close the socket.");
goto __exit;
}
else if (ret == 0)
{
/* 打印send函数返回值为0的警告信息 */
rt_kprintf("\n Send warning,send function return 0.\r\n");
LOG_W("Send warning, send function return 0.");
}
}

__exit:
if (recv_data)
{
rt_free(recv_data);
recv_data = RT_NULL;
}
if (sock >= 0)
{
closesocket(sock);
sock = -1;
}
started = 0;
is_running = 0;
return;
}

static void usage(void)
{
LOG_I("Usage: tcpclient -h <host> -p <port>");
LOG_I(" tcpclient --stop");
LOG_I(" tcpclient --help");
LOG_I("");
LOG_I("Miscellaneous:");
LOG_I(" -h Specify host address");
LOG_I(" -p Specify the host port number");
LOG_I(" --stop Stop tcpclient program");
LOG_I(" --help Print help information");
}

static void tcpclient_test(int argc, char** argv)
{
rt_thread_t tid;

if (argc == 1 || argc > 5)
{
LOG_I("Please check the command you entered!\n");
goto __usage;
}
else
{
if (rt_strcmp(argv[1], "--help") == 0)
{
goto __usage;
}
else if (rt_strcmp(argv[1], "--stop") == 0)
{
is_running = 0;
return;
}
else if (rt_strcmp(argv[1], "-h") == 0 && rt_strcmp(argv[3], "-p") == 0)
{
if (started)
{
LOG_I("The tcpclient has started!");
LOG_I("Please stop tcpclient firstly, by: tcpclient --stop");
return;
}

if (rt_strlen(argv[2]) > sizeof(url))
{
LOG_E("The input url is too long, max %d bytes!", sizeof(url));
return;
}
rt_memset(url, 0x0, sizeof(url));
rt_strncpy(url, argv[2], rt_strlen(argv[2]));
port = atoi(argv[4]);
}
else
{
goto __usage;
}
}

tid = rt_thread_create("tcp_client",
tcpclient, RT_NULL,
2048, RT_THREAD_PRIORITY_MAX/3, 20);
if (tid != RT_NULL)
{
rt_thread_startup(tid);
}
return;

__usage:
usage();
}

#ifdef RT_USING_FINSH
#include <finsh.h>
/* 输出tcpclient函数到finsh shell中 */
FINSH_FUNCTION_EXPORT(tcpclient, startup tcp client);
MSH_CMD_EXPORT_ALIAS(tcpclient_test, tcpclient,
Start a tcp client. Help: tcpclient --help);
#endif
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