基於DOS平臺下SOCKET編程
首先創建服務器端程序
void main()
{
//首先加載套接字庫,我這裏用的是1.1版本,有興趣的可以聯2.0庫,可以獲得更多功能啊
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD( 1, 1 );
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 ) {
return false;
}
if ( LOBYTE( wsaData.wVersion ) != 2 ||
HIBYTE( wsaData.wVersion ) != 2 ) {
WSACleanup( );
return false;
}
//創建套接字,在這之前,還要加兩個頭文件和一個庫文件,分別是
#include <Winsock2.h>
#include <stdio.h>
庫文件要在設置.工程裏面的連接選項中加入Use Ws2_32.libSOCKET s=socket(AF_INET,SOCK_DGRAM,0);
SOCKADDR_IN sockAddr;
sockAddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
sockAddr.sin_family = AF_INET;
sockAddr.sin_port = htons(5000);//這裏的端口可以隨便設置,但必須和客戶端的一致
//綁定套接字
bind(s,(sockaddr*)&sockAddr,sizeof(sockaddr));
char recvBuff[100];
char sendBuff[100];
char tempBuff[100];
SOCKADDR_IN sockFrom;
int len = sizeof(sockaddr);
while(true)
{
::recvfrom(s,recvBuff,100,0,(sockaddr*)&sockFrom,&len);
if('q' == recvBuff[0])
{
printf("Chat end!/n");
sendto(s,"q",strlen("q")+1,0,(sockaddr*)&sockFrom,len);
break;
}
sprintf(tempBuff,"%s say: %s",inet_ntoa(sockFrom.sin_addr),recvBuff);
printf("%s/n",tempBuff);
gets(sendBuff);
sendto(s,sendBuff,strlen(sendBuff)+1,0,(sockaddr*)&sockFrom,len);
}
closesocket(s);
WSACleanup( );
}
再來編寫客戶端代碼
再先前的工作空間中建立一個工程UdpClient,至於加入頭文件客庫文件和服務器端一模一樣
void main()
{
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD( 1,1 );
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 ) {
return ;
}
if ( LOBYTE( wsaData.wVersion ) != 1 ||
HIBYTE( wsaData.wVersion ) != 1 ) {
WSACleanup( );
return ;
}
SOCKET s = socket(AF_INET,SOCK_DGRAM,0);
SOCKADDR_IN sockAddr;
sockAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
sockAddr.sin_family = AF_INET;
sockAddr.sin_port = htons(5000);
char sendBuff[100];
char recvBuff[100];
char tempBuff[100];
printf("聊天通道已經完成,開始吧!/n");
SOCKADDR_IN sockFrom;
int len = sizeof(sockaddr);
while(true)
{
gets(sendBuff);
sendto(s,sendBuff,strlen(sendBuff)+1,0,(sockaddr*)&sockAddr,sizeof(sockaddr));
recvfrom(s,recvBuff,100,0,(sockaddr*)&sockFrom,&len);
if('q' == recvBuff[0])
{
printf("Chat End!/n");
sendto(s,"q",strlen("q")+1,0,(sockaddr*)&sockFrom,sizeof(sockaddr));
break;
}
sprintf(tempBuff,"%s say: %s",inet_ntoa(sockFrom.sin_addr),recvBuff);
printf("%s/n",tempBuff);
}
closesocket(s);
WSACleanup( );
}
這樣,一個簡單的聊天程序就完成了,但是它還有很多缺陷,比如說基於DOS的,客戶端必須先發送數據,然後纔是服務器端,交互性很差,由於它是基於UDP協議的,穩定性不是很理想,但作爲初期的網絡編程練習,我覺得還是恨道的,希望對你有幫助!