客户端代码
客户端代码:
#include
#include
#include
#pragma comment(lib,"ws2_32.lib") int main(int argc, char* argv[]){ //判断是否输入了IP地址和端口号
if(argc!=4){
printf("Usage: %s IPAddress PortNumber\n",argv[1]);
exit(-1);
}
//把字符串的IP地址转化为u_long
unsigned long ip;
if((ip=inet_addr(argv[2]))==INADDR_NONE){
printf("不合法的IP地址:%s",argv[1]);
exit(-1);
}
//把端口号转化成整数
short port;
if((port = atoi(argv[3]))==0){ printf("端口号有误~");
exit(-1);
}
printf("Connecting to %s:%d......\n",inet_ntoa(*(in_addr*)&ip),port);
WSADATA wsa;
//初始化套接字DLL
if(WSAStartup(MAKEWORD(2,2),&wsa)!=0){ printf("套接字初始化失败!");
exit(-1);
}
//创建套接字
SOCKET sock,serverSocket;
if((sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==INVALID_SOCKET){
printf("创建套接字失败~");
exit(-1);
}
struct sockaddr_in serverAddress; memset(&serverAddress,0,sizeof(sockaddr_in)); serverAddress.sin_family=AF_INET; serverAddress.sin_addr.S_un.S_addr = ip; serverAddress.sin_port = htons(port); //建立和服务器的连接
if(connect(sock,(sockaddr*)&serverAddress,sizeof(serverAddress))==SOCKET_ERR
OR)
{
printf("建立连接失败~");
exit(-1);
}
char buf[4096];
while(1){
printf(">");
//从控制台读取一行数据
gets(buf);
if(send(sock,buf,strlen(buf),0)==SOCKET_ERROR){
printf("发送c数据失败~"); exit(-1);
}
int bytes;
if((bytes=recv(sock,buf,sizeof(buf),0))==SOCKET_ERROR)
{
printf("接收c数据失败!\n"); exit(-1);
}
else
{
buf[bytes]='\0'; printf("Message from %s: %s\n",inet_ntoa(serverAddress.sin_addr),buf);
}
}
//清理套接字占用的资源
WSACleanup(); return 0;
}