////////////////////////////////////
//服务器代码
///////////////////////////////////
//本文件是服务器的代码
#include // for sockaddr_in
#include // for socket
#include // for socket
#include // for printf
#include // for exit
#include // for bzero
#include //for time_t and time

#define HELLO_WORLD_SERVER_PORT 7754
#define LENGTH_OF_LISTEN_QUEUE 20
#define BUFFER_SIZE 1024

int main(int argc, char **argv)
{
//设置一个socket地址结构server_addr,代表服务器internet地址, 端口
struct sockaddr_in server_addr;
bzero(&server_addr,sizeof(server_addr)); //把一段内存区的内容全部设置为0
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = htons(INADDR_ANY);
server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
// time_t now;
FILE *stream;

//创建用于internet的流协议(TCP)socket,用server_socket代表服务器socket
int server_socket = socket(AF_INET,SOCK_STREAM,0);
if( server_socket < 0)
{
printf("Create Socket Failed!");
exit(1);
}

//把socket和socket地址结构联系起来
if( bind(server_socket,(struct sockaddr*)&server_addr,sizeof(server_addr)))
{
printf("Server Bind Port : %d Failed!", HELLO_WORLD_SERVER_PORT);
exit(1);
}

//server_socket用于监听
if ( listen(server_socket, LENGTH_OF_LISTEN_QUEUE) )
{
printf("Server Listen Failed!");
exit(1);
}

while (1) //服务器端要一直运行
{

struct sockaddr_in client_addr;
socklen_t length = sizeof(client_addr);

int new_server_socket = accept(server_socket,(struct sockaddr*)&client_addr,&length);
if ( new_server_socket < 0)
{
printf("Server Accept Failed!\n");
break;
}

char buffer[BUFFER_SIZE];
bzero(buffer, BUFFER_SIZE);

strcpy(buffer,"Hello,World! 从服务器来！");
strcat(buffer,"\n"); //C语言字符串连接

send(new_server_socket,buffer,BUFFER_SIZE,0);

bzero(buffer,BUFFER_SIZE);
//接收客户端发送来的信息到buffer中
length = recv(new_server_socket,buffer,BUFFER_SIZE,0);

if (length < 0)
{
printf("Server Recieve Data Failed!\n");
exit(1);
}
printf("\n%s",buffer);

if((stream = fopen("data1","r"))==NULL)
{
printf("The file 'data1' was not opened! \n");
exit(1);
}
else

printf("The file 'filename' was opened! \n");
bzero(buffer,BUFFER_SIZE);

int lengsize = 0;
while((lengsize = fread(buffer,1,1024,stream)) > 0)
{

printf("lengsize = %d\n",lengsize);

if(send(new_server_socket,buffer,lengsize,0)<0)
{
printf("Send File is Failed\n");
break;
}

bzero(buffer, BUFFER_SIZE);

}
if(fclose(stream))
printf("The file 'data' was not closed! \n");
exit(1);

//关闭与客户端的连接
close(new_server_socket);
}
//关闭监听用的socket
close(server_socket);
return 0;
}
////////////////////////////////////
//客户端代码
///////////////////////////////////

//本文件是客户机的代码
#include // for sockaddr_in
#include // for socket
#include // for socket
#include // for printf
#include // for exit
#include // for bzero
#include //for time_t and time
#include

#define HELLO_WORLD_SERVER_PORT 7754
#define BUFFER_SIZE 1024

int main(int argc, char **argv)
{
if (argc != 2)
{
printf("Usage: ./%s ServerIPAddress\n",argv[0]);
exit(1);
}

//time_t now;
FILE *stream;