{
// TODO: Add your control notification handler code here
//CString s;
//char * msg;
//send_edit->GetWindowTextW(s);
//msg = (LPSTR)(LPCTSTR)s;
//CString2Char(s, msg);
CString s;
char msg[1024];
send_edit->GetWindowTextW(s);
CString2Char(s, msg);
if (send(sock, msg, strlen(msg), 0) == SOCKET_ERROR)
{
update(_T("发送失败"));
}
else if (s == "")
{
MessageBox(_T("请输入信息"));
}
else
{
s = msg;
update(_T("client:") + s);//消息上屏,清空输入,并重获焦点
send_edit->SetWindowText(_T(""));
send_edit->SetFocus();
}
/*CString s;
char * msg;
send_edit->GetWindowText(s);
msg = (char*)s.GetBuffer(s.GetLength());
if (send(sock, msg, strlen(msg), 0) == SOCKET_ERROR)
{
show_edit->ReplaceSel(_T("发送失败/r/n"));
}
else if (s == "")
{
MessageBox(_T("请输入信息"));
}
else
{
show_edit->ReplaceSel(_T("client:") + s + "/r/n");//消息上屏,清空输入,并重获焦点
send_edit->SetWindowText(_T(""));
send_edit->SetFocus();
}*/
}
8、最后添加字符格式转换函数
/*
* 函数名: CString2Char
* 参数1: CString str 待转换字符串
* 参数2: char ch[] 转换后将要储存的位置
* 将Unicode下的CString转换为char*
*/
void CString2Char(CString str, char ch[])
{
int i;
char *tmpch;
int wLen = WideCharToMultiByte(CP_ACP, 0, str, -1, NULL, 0, NULL, NULL);//得到Char的长度
tmpch = new char[wLen + 1]; //分配变量的地址大小
WideCharToMultiByte(CP_ACP, 0, str, -1, tmpch, wLen, NULL, NULL); //将CString转换成char*
for (i = 0; tmpch[i] != '\0'; i++) ch[i] = tmpch[i];
ch[i] = '\0';
}
本篇文章实现了一个基于TCP 的一个非常简单的客户/服务器通信程序实例。该程序中通讯协议使用的是面向连接的TCP协议SOCK_STREAM, 服务器的ip地址为本地地址即:
127.0.0.1,端口号为自定义的5099(大于1024即可),服务端的功能只要有客户端连接请求,服务端就接受连接,在连接成功后向客户端发送数据,并且接受客户端发送的
数据。客户端在向服务端发出请求后接受并显示服务端的数据,并且给服务端也发送数据。
以下代码是服务端程序代码:
- #include <WinSock2.h>
- #include <stdio.h>
- #include <stdlib.h>
- #pragma comment(lib, "ws2_32.lib")
- void main()
- {
- WSADATA wsaData;
- int port = 5099;
- char buf[] = "Server: hello, I am a server.....";
- if(WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
- {
- printf("Failed to load Winsock");
- return;
- }
- //创建用于监听的套接字
- SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0);
- SOCKADDR_IN addrSrv;
- addrSrv.sin_family = AF_INET;
- addrSrv.sin_port = htons(port); //1024以上的端口号
- addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
- int retVal = bind(sockSrv, (LPSOCKADDR)&addrSrv, sizeof(SOCKADDR_IN));
- if(retVal == SOCKET_ERROR){
- printf("Failed bind:%d\n", WSAGetLastError());
- return;
- }
- if(listen(sockSrv,10) ==SOCKET_ERROR){
- printf("Listen failed:%d", WSAGetLastError());
- return;
- }
- SOCKADDR_IN addrClient;
- int len = sizeof(SOCKADDR);
- while(1)
- {
- //等待客户请求到来
- SOCKET sockConn = accept(sockSrv, (SOCKADDR *) &addrClient, &len);
- if(sockConn == SOCKET_ERROR){
- printf("Accept failed:%d", WSAGetLastError());
- break;
- }
- printf("Accept client IP:[%s]\n", inet_ntoa(addrClient.sin_addr));
- //发送数据
- int iSend = send(sockConn, buf, sizeof(buf) , 0);
- if(iSend == SOCKET_ERROR){
- printf("send failed");
- break;
- }
- char recvBuf[100];
- memset(recvBuf, 0, sizeof(recvBuf));
- // //接收数据
- recv(sockConn, recvBuf, sizeof(recvBuf), 0);
- printf("%s\n", recvBuf);
- closesocket(sockConn);
- }
- closesocket(sockSrv);
- WSACleanup();
- system("pause");
- }
#include <WinSock2.h>
#include <stdio.h>
#include <stdlib.h>
#pragma comment(lib, "ws2_32.lib")
void main()
{
WSADATA wsaData;
int port = 5099;
char buf[] = "Server: hello, I am a server.....";
if(WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
{
printf("Failed to load Winsock");
return;
}
//创建用于监听的套接字
SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0);
SOCKADDR_IN addrSrv;
addrSrv.sin_family = AF_INET;
addrSrv.sin_port = htons(port); //1024以上的端口号
addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
int retVal = bind(sockSrv, (LPSOCKADDR)&addrSrv, sizeof(SOCKADDR_IN));
if(retVal == SOCKET_ERROR){
printf("Failed bind:%d\n", WSAGetLastError());
return;
}
if(listen(sockSrv,10) ==SOCKET_ERROR){
printf("Listen failed:%d", WSAGetLastError());
return;
}
SOCKADDR_IN addrClient;
int len = sizeof(SOCKADDR);
while(1)
{
//等待客户请求到来
SOCKET sockConn = accept(sockSrv, (SOCKADDR *) &addrClient, &len);
if(sockConn == SOCKET_ERROR){
printf("Accept failed:%d", WSAGetLastError());
break;
}
printf("Accept client IP:[%s]\n", inet_ntoa(addrClient.sin_addr));
//发送数据
int iSend = send(sockConn, buf, sizeof(buf) , 0);
if(iSend == SOCKET_ERROR){
printf("send failed");
break;
}
char recvBuf[100];
memset(recvBuf, 0, sizeof(recvBuf));
// //接收数据
recv(sockConn, recvBuf, sizeof(recvBuf), 0);
printf("%s\n", recvBuf);
closesocket(sockConn);
}
closesocket(sockSrv);
WSACleanup();
system("pause");
}
接下来是客户端代码:
- #include <WinSock2.h>
- #include <stdio.h>
- #pragma comment(lib, "ws2_32.lib")
- void main()
- {
- //加载套接字
- WSADATA wsaData;
- char buff[1024];
- memset(buff, 0, sizeof(buff));
- if(WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
- {
- printf("Failed to load Winsock");
- return;
- }
- SOCKADDR_IN addrSrv;
- addrSrv.sin_family = AF_INET;
- addrSrv.sin_port = htons(5099);
- addrSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
- //创建套接字
- SOCKET sockClient = socket(AF_INET, SOCK_STREAM, 0);
- if(SOCKET_ERROR == sockClient){
- printf("Socket() error:%d", WSAGetLastError());
- return;
- }
- //向服务器发出连接请求
- if(connect(sockClient, (struct sockaddr*)&addrSrv, sizeof(addrSrv)) == INVALID_SOCKET){
- printf("Connect failed:%d", WSAGetLastError());
- return;
- }else
- {
- //接收数据
- recv(sockClient, buff, sizeof(buff), 0);
- printf("%s\n", buff);
- }
- //发送数据
- char buff[28] = "hello, this is a Client....";
- send(sockClient, buff, sizeof(buff), 0);
- //关闭套接字
- closesocket(sockClient);
- WSACleanup();
- }
#include <WinSock2.h>
#include <stdio.h>
#pragma comment(lib, "ws2_32.lib")
void main()
{
//加载套接字
WSADATA wsaData;
char buff[1024];
memset(buff, 0, sizeof(buff));
if(WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
{
printf("Failed to load Winsock");
return;
}
SOCKADDR_IN addrSrv;
addrSrv.sin_family = AF_INET;
addrSrv.sin_port = htons(5099);
addrSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
//创建套接字
SOCKET sockClient = socket(AF_INET, SOCK_STREAM, 0);
if(SOCKET_ERROR == sockClient){
printf("Socket() error:%d", WSAGetLastError());
return;
}
//向服务器发出连接请求
if(connect(sockClient, (struct sockaddr*)&addrSrv, sizeof(addrSrv)) == INVALID_SOCKET){
printf("Connect failed:%d", WSAGetLastError());
return;
}else
{
//接收数据
recv(sockClient, buff, sizeof(buff), 0);
printf("%s\n", buff);
}
//发送数据
char buff = "hello, this is a Client....";
send(sockClient, buff, sizeof(buff), 0);
//关闭套接字
closesocket(sockClient);
WSACleanup();
}
运行结果: