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rt-thread-official
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Fixed buffer size issue. 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2166 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong@gmail.com 2012-06-14 15:47:27 +00:00
parent 7582459691
commit 5cf2b9c3a2
2 changed files with 10 additions and 6 deletions
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8
examples/network/tcpclient.c
View File

@ -2,6 +2,8 @@
#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 */
#define BUFSZ 1024
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)
{
@ -14,7 +16,7 @@ void tcpclient(const char* url, int port)
host = gethostbyname(url);
/* 分配用于存放接收数据的缓冲 */
recv_data = rt_malloc(1024);
recv_data = rt_malloc(BUFSZ);
if (recv_data == RT_NULL)
{
rt_kprintf("No memory\n");
@ -51,8 +53,8 @@ void tcpclient(const char* url, int port)
while(1)
{
/* 从sock连接中接收最大1024字节数据 */
bytes_received = recv(sock, recv_data, 1024, 0);
/* 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 */

8
examples/network/udpserver.c
View File

@ -1,6 +1,8 @@
#include <rtthread.h>
#include <lwip/sockets.h> /* 使用BSD socket，需要包含sockets.h头文件 */
#define BUFSZ 1024
void udpserv(void* paramemter)
{
int sock;
@ -10,7 +12,7 @@ void udpserv(void* paramemter)
struct sockaddr_in server_addr, client_addr;
/* 分配接收用的数据缓冲 */
recv_data = rt_malloc(1024);
recv_data = rt_malloc(BUFSZ);
if (recv_data == RT_NULL)
{
/* 分配内存失败，返回 */
@ -51,8 +53,8 @@ void udpserv(void* paramemter)
while (1)
{
/* 从sock中收取最大1024字节数据 */
bytes_read = recvfrom(sock, recv_data, 1024, 0,
/* 从sock中收取最大BUFSZ - 1字节数据 */
bytes_read = recvfrom(sock, recv_data, BUFSZ - 1, 0,
(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 */