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[examples] update: 

1. cleanup for posix dfs_net.
2. fixed recv buf overwrite.
3. format code.
This commit is contained in:
aozima 2018-02-06 18:59:24 +08:00
parent ff811a93ff
commit e20fb2f5b2
6 changed files with 254 additions and 238 deletions
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49
examples/network/chargen.c
View File

@ -1,7 +1,14 @@
#include <rtthread.h> #include <rtthread.h>
#include <sys/socket.h> #include <sys/socket.h>
#include <sys/select.h>
#include <dfs_posix.h> #ifdef RT_USING_DFS_NET
#include <sys/select.h> // only dfs_net
#include <dfs_posix.h>
#else
#define read lwip_read
#define write lwip_write
#endif /* RT_USING_DFS_NET */
#include "netdb.h" #include "netdb.h"
#define MAX_SERV 32 /* Maximum number of chargen services. Don't need too many */ #define MAX_SERV 32 /* Maximum number of chargen services. Don't need too many */
@ -52,16 +59,16 @@ static void chargen_thread(void *arg)
if (bind(listenfd, (struct sockaddr *) &chargen_saddr, sizeof(chargen_saddr)) == -1) if (bind(listenfd, (struct sockaddr *) &chargen_saddr, sizeof(chargen_saddr)) == -1)
LWIP_ASSERT("chargen_thread(): Socket bind failed.", 0); LWIP_ASSERT("chargen_thread(): Socket bind failed.", 0);
/* Put socket into listening mode */ /* Put socket into listening mode */
if (listen(listenfd, MAX_SERV) == -1) if (listen(listenfd, MAX_SERV) == -1)
LWIP_ASSERT("chargen_thread(): Listen failed.", 0); LWIP_ASSERT("chargen_thread(): Listen failed.", 0);
/* Wait forever for network input: This could be connections or data */ /* Wait forever for network input: This could be connections or data */
for (;;) for (;;)
{ {
maxfdp1 = listenfd+1; maxfdp1 = listenfd + 1;
/* Determine what sockets need to be in readset */ /* Determine what sockets need to be in readset */
FD_ZERO(&readset); FD_ZERO(&readset);
@ -78,7 +85,7 @@ static void chargen_thread(void *arg)
/* Wait for data or a new connection */ /* Wait for data or a new connection */
i = select(maxfdp1, &readset, &writeset, 0, 0); i = select(maxfdp1, &readset, &writeset, 0, 0);
if (i == 0) continue; if (i == 0) continue;
/* At least one descriptor is ready */ /* At least one descriptor is ready */
if (FD_ISSET(listenfd, &readset)) if (FD_ISSET(listenfd, &readset))
@ -89,8 +96,8 @@ static void chargen_thread(void *arg)
if (p_charcb) if (p_charcb)
{ {
p_charcb->socket = accept(listenfd, p_charcb->socket = accept(listenfd,
(struct sockaddr *) &p_charcb->cliaddr, (struct sockaddr *) &p_charcb->cliaddr,
&p_charcb->clilen); &p_charcb->clilen);
if (p_charcb->socket < 0) if (p_charcb->socket < 0)
rt_free(p_charcb); rt_free(p_charcb);
else else
@ -101,8 +108,8 @@ static void chargen_thread(void *arg)
p_charcb->nextchar = 0x21; p_charcb->nextchar = 0x21;
} }
} }
else else
{ {
/* No memory to accept connection. Just accept and then close */ /* No memory to accept connection. Just accept and then close */
int sock; int sock;
struct sockaddr cliaddr; struct sockaddr cliaddr;
@ -113,6 +120,7 @@ static void chargen_thread(void *arg)
closesocket(sock); closesocket(sock);
} }
} }
/* Go through list of connected clients and process data */ /* Go through list of connected clients and process data */
for (p_charcb = charcb_list; p_charcb; p_charcb = p_charcb->next) for (p_charcb = charcb_list; p_charcb; p_charcb = p_charcb->next)
{ {
@ -124,17 +132,19 @@ static void chargen_thread(void *arg)
if (do_read(p_charcb) < 0) if (do_read(p_charcb) < 0)
break; break;
} }
if (FD_ISSET(p_charcb->socket, &writeset)) if (FD_ISSET(p_charcb->socket, &writeset))
{ {
char line[80]; char line[80];
char setchar = p_charcb->nextchar; char setchar = p_charcb->nextchar;
for( i = 0; i < 59; i++) for (i = 0; i < 59; i++)
{ {
line[i] = setchar; line[i] = setchar;
if (++setchar == 0x7f) if (++setchar == 0x7f)
setchar = 0x21; setchar = 0x21;
} }
line[i] = 0; line[i] = 0;
strcat(line, "\n\r"); strcat(line, "\n\r");
if (write(p_charcb->socket, line, strlen(line)) < 0) if (write(p_charcb->socket, line, strlen(line)) < 0)
@ -142,6 +152,7 @@ static void chargen_thread(void *arg)
close_chargen(p_charcb); close_chargen(p_charcb);
break; break;
} }
if (++p_charcb->nextchar == 0x7f) if (++p_charcb->nextchar == 0x7f)
p_charcb->nextchar = 0x21; p_charcb->nextchar = 0x21;
} }
@ -202,19 +213,19 @@ static int do_read(struct charcb *p_charcb)
void chargen_init(void) void chargen_init(void)
{ {
rt_thread_t chargen; rt_thread_t chargen;
chargen = rt_thread_create(CHARGEN_THREAD_NAME, chargen = rt_thread_create(CHARGEN_THREAD_NAME,
chargen_thread, RT_NULL, chargen_thread, RT_NULL,
CHARGEN_THREAD_STACKSIZE, CHARGEN_THREAD_STACKSIZE,
CHARGEN_PRIORITY, 5); CHARGEN_PRIORITY, 5);
if (chargen != RT_NULL) rt_thread_startup(chargen); if (chargen != RT_NULL) rt_thread_startup(chargen);
} }
#ifdef RT_USING_FINSH #ifdef RT_USING_FINSH
#include <finsh.h> #include <finsh.h>
void chargen() void chargen()
{ {
chargen_init(); chargen_init();
} }
FINSH_FUNCTION_EXPORT(chargen, start chargen server); FINSH_FUNCTION_EXPORT(chargen, start chargen server);
#endif #endif

16
examples/network/tcpclient.c
View File

@ -1,15 +1,12 @@
#include <rtthread.h> #include <rtthread.h>
//#include <lwip/netdb.h> /* 为了解析主机名，需要包含netdb.h头文件 */ #include <sys/socket.h> /* 使用BSD socket，需要包含socket.h头文件 */
//#include <lwip/sockets.h> /* 使用BSD socket，需要包含sockets.h头文件 */
#include <sys/socket.h> /* 使用BSD socket，需要包含sockets.h头文件 */
#include "netdb.h" #include "netdb.h"
#define BUFSZ 1024 #define BUFSZ 1024
static const char send_data[] = "This is TCP Client from RT-Thread."; /* 发送用到的数据 */ 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) void tcpclient(const char *url, int port)
{ {
int ret; int ret;
char *recv_data; char *recv_data;
@ -57,7 +54,7 @@ void tcpclient(const char* url, int port)
return; return;
} }
while(1) while (1)
{ {
/* 从sock连接中接收最大BUFSZ - 1字节数据 */ /* 从sock连接中接收最大BUFSZ - 1字节数据 */
bytes_received = recv(sock, recv_data, BUFSZ - 1, 0); bytes_received = recv(sock, recv_data, BUFSZ - 1, 0);
@ -75,13 +72,14 @@ void tcpclient(const char* url, int port)
{ {
/* 打印recv函数返回值为0的警告信息 */ /* 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"); rt_kprintf("\nReceived warning,recv function return 0.\r\n");
continue; continue;
} }
/* 有接收到数据，把末端清零 */ /* 有接收到数据，把末端清零 */
recv_data[bytes_received] = '\0'; recv_data[bytes_received] = '\0';
if (strcmp(recv_data , "q") == 0 || strcmp(recv_data , "Q") == 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 */ /* 如果是首字母是q或Q，关闭这个连接 */
closesocket(sock); closesocket(sock);
@ -94,11 +92,11 @@ void tcpclient(const char* url, int port)
else else
{ {
/* 在控制终端显示收到的数据 */ /* 在控制终端显示收到的数据 */
rt_kprintf("\nReceived data = %s " , recv_data); rt_kprintf("\nReceived data = %s ", recv_data);
} }
/* 发送数据到sock连接 */ /* 发送数据到sock连接 */
ret = send(sock,send_data,strlen(send_data), 0); ret = send(sock, send_data, strlen(send_data), 0);
if (ret < 0) if (ret < 0)
{ {
/* 接收失败，关闭这个连接 */ /* 接收失败，关闭这个连接 */

17
examples/network/tcpsendpacket.c
View File

@ -1,8 +1,9 @@
#include <rtthread.h> #include <rtthread.h>
#include <lwip/netdb.h> /* 为了解析主机名，需要包含netdb.h头文件 */
#include <lwip/sockets.h> /* 使用BSD socket，需要包含sockets.h头文件 */
void tcp_senddata(const char* url, int port, int length) #include <netdb.h> /* 为了解析主机名，需要包含netdb.h头文件 */
#include <sys/socket.h> /* 使用BSD socket，需要包含socket.h头文件 */
void tcp_senddata(const char *url, int port, int length)
{ {
struct hostent *host; struct hostent *host;
int sock, err, result, timeout, index; int sock, err, result, timeout, index;
@ -27,7 +28,7 @@ void tcp_senddata(const char* url, int port, int length)
timeout = 100; timeout = 100;
/* 设置发送超时时间100ms */ /* 设置发送超时时间100ms */
lwip_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(timeout)); setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(timeout));
/* 初始化预连接的服务端地址 */ /* 初始化预连接的服务端地址 */
server_addr.sin_family = AF_INET; server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(port); server_addr.sin_port = htons(port);
@ -38,20 +39,20 @@ void tcp_senddata(const char* url, int port, int length)
err = connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)); err = connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr));
rt_kprintf("TCP thread connect error code: %d\n", err); rt_kprintf("TCP thread connect error code: %d\n", err);
while(1) while (1)
{ {
/* 发送数据到sock连接 */ /* 发送数据到sock连接 */
result = send(sock, buffer_ptr, length, MSG_DONTWAIT); result = send(sock, buffer_ptr, length, MSG_DONTWAIT);
if(result < 0) //数据发送错误处理 if (result < 0) //数据发送错误处理
{ {
rt_kprintf("TCP thread send error: %d\n", result); rt_kprintf("TCP thread send error: %d\n", result);
lwip_close(sock); closesocket(sock);
/* 关闭连接，重新创建连接 */ /* 关闭连接，重新创建连接 */
rt_thread_delay(10); rt_thread_delay(10);
if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1)
rt_kprintf("TCP Socket error:%d\n",sock); rt_kprintf("TCP Socket error:%d\n", sock);
err = connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)); err = connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr));
rt_kprintf("TCP thread connect error code: %d\n", err); rt_kprintf("TCP thread connect error code: %d\n", err);

223
examples/network/tcpserver.c
View File

@ -1,140 +1,147 @@
#include <rtthread.h> #include <rtthread.h>
//#include <lwip/sockets.h> /* 使用BSD Socket接口必须包含sockets.h这个头文件 */ #include <sys/socket.h> /* 使用BSD socket，需要包含socket.h头文件 */
#include <sys/socket.h> /* 使用BSD socket，需要包含sockets.h头文件 */
#include "netdb.h" #include "netdb.h"
#define BUFSZ (1024)
static const char send_data[] = "This is TCP Server from RT-Thread."; /* 发送用到的数据 */ static const char send_data[] = "This is TCP Server from RT-Thread."; /* 发送用到的数据 */
void tcpserv(void* parameter) static void tcpserv(void *parameter)
{ {
char *recv_data; /* 用于接收的指针，后面会做一次动态分配以请求可用内存 */ char *recv_data; /* 用于接收的指针，后面会做一次动态分配以请求可用内存 */
rt_uint32_t sin_size; socklen_t sin_size;
int sock, connected, bytes_received; int sock, connected, bytes_received;
struct sockaddr_in server_addr, client_addr; struct sockaddr_in server_addr, client_addr;
rt_bool_t stop = RT_FALSE; /* 停止标志 */ rt_bool_t stop = RT_FALSE; /* 停止标志 */
int ret; int ret;
recv_data = rt_malloc(1024); /* 分配接收用的数据缓冲 */ recv_data = rt_malloc(BUFSZ + 1); /* 分配接收用的数据缓冲 */
if (recv_data == RT_NULL) if (recv_data == RT_NULL)
{ {
rt_kprintf("No memory\n"); rt_kprintf("No memory\n");
return; return;
} }
/* 一个socket在使用前，需要预先创建出来，指定SOCK_STREAM为TCP的socket */ /* 一个socket在使用前，需要预先创建出来，指定SOCK_STREAM为TCP的socket */
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{ {
/* 创建失败的错误处理 */ /* 创建失败的错误处理 */
rt_kprintf("Socket error\n"); rt_kprintf("Socket error\n");
/* 释放已分配的接收缓冲 */ /* 释放已分配的接收缓冲 */
rt_free(recv_data); rt_free(recv_data);
return; return;
} }
/* 初始化服务端地址 */ /* 初始化服务端地址 */
server_addr.sin_family = AF_INET; server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(5000); /* 服务端工作的端口 */ server_addr.sin_port = htons(5000); /* 服务端工作的端口 */
server_addr.sin_addr.s_addr = INADDR_ANY; server_addr.sin_addr.s_addr = INADDR_ANY;
rt_memset(&(server_addr.sin_zero),8, sizeof(server_addr.sin_zero)); rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero));
/* 绑定socket到服务端地址 */ /* 绑定socket到服务端地址 */
if (bind(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1) if (bind(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1)
{ {
/* 绑定失败 */ /* 绑定失败 */
rt_kprintf("Unable to bind\n"); rt_kprintf("Unable to bind\n");
/* 释放已分配的接收缓冲 */ /* 释放已分配的接收缓冲 */
rt_free(recv_data); rt_free(recv_data);
return; return;
} }
/* 在socket上进行监听 */ /* 在socket上进行监听 */
if (listen(sock, 5) == -1) if (listen(sock, 5) == -1)
{ {
rt_kprintf("Listen error\n"); rt_kprintf("Listen error\n");
/* release recv buffer */ /* release recv buffer */
rt_free(recv_data); rt_free(recv_data);
return; return;
} }
rt_kprintf("\nTCPServer Waiting for client on port 5000...\n"); rt_kprintf("\nTCPServer Waiting for client on port 5000...\n");
while(stop != RT_TRUE) while (stop != RT_TRUE)
{ {
sin_size = sizeof(struct sockaddr_in); sin_size = sizeof(struct sockaddr_in);
/* 接受一个客户端连接socket的请求，这个函数调用是阻塞式的 */ /* 接受一个客户端连接socket的请求，这个函数调用是阻塞式的 */
connected = accept(sock, (struct sockaddr *)&client_addr, &sin_size); connected = accept(sock, (struct sockaddr *)&client_addr, &sin_size);
/* 返回的是连接成功的socket */ /* 返回的是连接成功的socket */
if (connected < 0)
{
rt_kprintf("accept connection failed! errno = %d\n", errno);
continue;
}
/* 接受返回的client_addr指向了客户端的地址信息 */ /* 接受返回的client_addr指向了客户端的地址信息 */
rt_kprintf("I got a connection from (%s , %d)\n", rt_kprintf("I got a connection from (%s , %d)\n",
inet_ntoa(client_addr.sin_addr),ntohs(client_addr.sin_port)); inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));
/* 客户端连接的处理 */ /* 客户端连接的处理 */
while (1) while (1)
{ {
/* 发送数据到connected socket */ /* 发送数据到connected socket */
ret = send(connected, send_data, strlen(send_data), 0); ret = send(connected, send_data, strlen(send_data), 0);
if (ret < 0) if (ret < 0)
{ {
/* 发送失败，关闭这个连接 */ /* 发送失败，关闭这个连接 */
closesocket(connected); closesocket(connected);
rt_kprintf("\nsend error,close the socket.\r\n"); rt_kprintf("\nsend error,close the socket.\r\n");
break; break;
} }
else if (ret == 0) else if (ret == 0)
{ {
/* 打印send函数返回值为0的警告信息 */ /* 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"); rt_kprintf("\n Send warning,send function return 0.\r\n");
} }
/* 从connected socket中接收数据，接收buffer是1024大小，但并不一定能够收到1024大小的数据 */ /* 从connected socket中接收数据，接收buffer是1024大小，但并不一定能够收到1024大小的数据 */
bytes_received = recv(connected,recv_data, 1024, 0); bytes_received = recv(connected, recv_data, BUFSZ, 0);
if (bytes_received < 0) if (bytes_received < 0)
{ {
/* 接收失败，关闭这个connected socket */ /* 接收失败，关闭这个connected socket */
closesocket(connected); closesocket(connected);
break; break;
} }
else if (bytes_received == 0) else if (bytes_received == 0)
{ {
/* 打印recv函数返回值为0的警告信息 */ /* 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"); rt_kprintf("\nReceived warning,recv function return 0.\r\n");
continue; closesocket(connected);
} break;
}
/* 有接收到数据，把末端清零 */ /* 有接收到数据，把末端清零 */
recv_data[bytes_received] = '\0'; recv_data[bytes_received] = '\0';
if (strcmp(recv_data , "q") == 0 || strcmp(recv_data , "Q") == 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 */ /* 如果是首字母是q或Q，关闭这个连接 */
closesocket(connected); closesocket(connected);
break; break;
} }
else if (strcmp(recv_data, "exit") == 0) else if (strcmp(recv_data, "exit") == 0)
{ {
/* 如果接收的是exit，则关闭整个服务端 */ /* 如果接收的是exit，则关闭整个服务端 */
closesocket(connected); closesocket(connected);
stop = RT_TRUE; stop = RT_TRUE;
break; break;
} }
else else
{ {
/* 在控制终端显示收到的数据 */ /* 在控制终端显示收到的数据 */
rt_kprintf("RECEIVED DATA = %s \n" , recv_data); rt_kprintf("RECEIVED DATA = %s \n", recv_data);
} }
} }
} }
/* 退出服务 */ /* 退出服务 */
closesocket(sock); closesocket(sock);
/* 释放接收缓冲 */ /* 释放接收缓冲 */
rt_free(recv_data); rt_free(recv_data);
return ; return ;
} }
#ifdef RT_USING_FINSH #ifdef RT_USING_FINSH

60
examples/network/udpclient.c
View File

@ -5,44 +5,44 @@
#include "netdb.h" #include "netdb.h"
const char send_data[] = "This is UDP Client from RT-Thread.\n"; /* 发送用到的数据 */ const char send_data[] = "This is UDP Client from RT-Thread.\n"; /* 发送用到的数据 */
void udpclient(const char* url, int port, int count) void udpclient(const char *url, int port, int count)
{ {
int sock; int sock;
struct hostent *host; struct hostent *host;
struct sockaddr_in server_addr; struct sockaddr_in server_addr;
/* 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） */ /* 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= (struct hostent *) gethostbyname(url); host = (struct hostent *) gethostbyname(url);
/* 创建一个socket，类型是SOCK_DGRAM，UDP类型 */ /* 创建一个socket，类型是SOCK_DGRAM，UDP类型 */
if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
{ {
rt_kprintf("Socket error\n"); rt_kprintf("Socket error\n");
return; return;
} }
/* 初始化预连接的服务端地址 */ /* 初始化预连接的服务端地址 */
server_addr.sin_family = AF_INET; server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(port); server_addr.sin_port = htons(port);
server_addr.sin_addr = *((struct in_addr *)host->h_addr); server_addr.sin_addr = *((struct in_addr *)host->h_addr);
rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero)); rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero));
/* 总计发送count次数据 */ /* 总计发送count次数据 */
while (count) while (count)
{ {
/* 发送数据到服务远端 */ /* 发送数据到服务远端 */
sendto(sock, send_data, strlen(send_data), 0, sendto(sock, send_data, strlen(send_data), 0,
(struct sockaddr *)&server_addr, sizeof(struct sockaddr)); (struct sockaddr *)&server_addr, sizeof(struct sockaddr));
/* 线程休眠一段时间 */ /* 线程休眠一段时间 */
rt_thread_delay(50); rt_thread_delay(50);
/* 计数值减一 */ /* 计数值减一 */
count --; count --;
} }
/* 关闭这个socket */ /* 关闭这个socket */
closesocket(sock); closesocket(sock);
} }
#ifdef RT_USING_FINSH #ifdef RT_USING_FINSH

127
examples/network/udpserver.c
View File

@ -1,85 +1,84 @@
#include <rtthread.h> #include <rtthread.h>
//#include <lwip/sockets.h> /* 使用BSD socket，需要包含sockets.h头文件 */
#include <sys/socket.h> /* 使用BSD socket，需要包含sockets.h头文件 */ #include <sys/socket.h> /* 使用BSD socket，需要包含socket.h头文件 */
#include "netdb.h" #include "netdb.h"
#define BUFSZ 1024
#define BUFSZ 1024 static void udpserv(void *paramemter)
void udpserv(void* paramemter)
{ {
int sock; int sock;
int bytes_read; int bytes_read;
char *recv_data; char *recv_data;
rt_uint32_t addr_len; socklen_t addr_len;
struct sockaddr_in server_addr, client_addr; struct sockaddr_in server_addr, client_addr;
/* 分配接收用的数据缓冲 */ /* 分配接收用的数据缓冲 */
recv_data = rt_malloc(BUFSZ); recv_data = rt_malloc(BUFSZ);
if (recv_data == RT_NULL) if (recv_data == RT_NULL)
{ {
/* 分配内存失败，返回 */ /* 分配内存失败，返回 */
rt_kprintf("No memory\n"); rt_kprintf("No memory\n");
return; return;
} }
/* 创建一个socket，类型是SOCK_DGRAM，UDP类型 */ /* 创建一个socket，类型是SOCK_DGRAM，UDP类型 */
if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
{ {
rt_kprintf("Socket error\n"); rt_kprintf("Socket error\n");
/* 释放接收用的数据缓冲 */ /* 释放接收用的数据缓冲 */
rt_free(recv_data); rt_free(recv_data);
return; return;
} }
/* 初始化服务端地址 */ /* 初始化服务端地址 */
server_addr.sin_family = AF_INET; server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(5000); server_addr.sin_port = htons(5000);
server_addr.sin_addr.s_addr = INADDR_ANY; server_addr.sin_addr.s_addr = INADDR_ANY;
rt_memset(&(server_addr.sin_zero),0, sizeof(server_addr.sin_zero)); rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero));
/* 绑定socket到服务端地址 */ /* 绑定socket到服务端地址 */
if (bind(sock,(struct sockaddr *)&server_addr, if (bind(sock, (struct sockaddr *)&server_addr,
sizeof(struct sockaddr)) == -1) sizeof(struct sockaddr)) == -1)
{ {
/* 绑定地址失败 */ /* 绑定地址失败 */
rt_kprintf("Bind error\n"); rt_kprintf("Bind error\n");
/* 释放接收用的数据缓冲 */ /* 释放接收用的数据缓冲 */
rt_free(recv_data); rt_free(recv_data);
return; return;
} }
addr_len = sizeof(struct sockaddr); addr_len = sizeof(struct sockaddr);
rt_kprintf("UDPServer Waiting for client on port 5000...\n"); rt_kprintf("UDPServer Waiting for client on port 5000...\n");
while (1) while (1)
{ {
/* 从sock中收取最大BUFSZ - 1字节数据 */ /* 从sock中收取最大BUFSZ - 1字节数据 */
bytes_read = recvfrom(sock, recv_data, BUFSZ - 1, 0, bytes_read = recvfrom(sock, recv_data, BUFSZ - 1, 0,
(struct sockaddr *)&client_addr, &addr_len); (struct sockaddr *)&client_addr, &addr_len);
/* UDP不同于TCP，它基本不会出现收取的数据失败的情况，除非设置了超时等待 */ /* UDP不同于TCP，它基本不会出现收取的数据失败的情况，除非设置了超时等待 */
recv_data[bytes_read] = '\0'; /* 把末端清零 */ recv_data[bytes_read] = '\0'; /* 把末端清零 */
/* 输出接收的数据 */ /* 输出接收的数据 */
rt_kprintf("\n(%s , %d) said : ",inet_ntoa(client_addr.sin_addr), rt_kprintf("\n(%s , %d) said : ", inet_ntoa(client_addr.sin_addr),
ntohs(client_addr.sin_port)); ntohs(client_addr.sin_port));
rt_kprintf("%s", recv_data); rt_kprintf("%s", recv_data);
/* 如果接收数据是exit，退出 */ /* 如果接收数据是exit，退出 */
if (strcmp(recv_data, "exit") == 0) if (strcmp(recv_data, "exit") == 0)
{ {
closesocket(sock); closesocket(sock);
/* 释放接收用的数据缓冲 */ /* 释放接收用的数据缓冲 */
rt_free(recv_data); rt_free(recv_data);
break; break;
} }
} }
return; return;
} }
#ifdef RT_USING_FINSH #ifdef RT_USING_FINSH