服务器：

#include

#include

#include

#include

#include

#include

#include

#define SERVER_PORT 6666

#define LISTEN_QUEUE 20

#define BUFFER_SIZE 1024

int main(int argc,char **argv)

{

struct sockaddr_in server_addr;

bzero(&server_addr,sizeof(server_addr));//全部置零

//设置地址相关的属性

server_addr.sin_family=AF_INET;

server_addr.sin_addr.s_addr=htons(INADDR_ANY);

server_addr.sin_port=htons(SERVER_PORT);

//创建套接字

int server_socket=socket(AF_INET,SOCK_STREAM,0);

if(server_socket<0)

{

printf("socket create error\n");

exit(1);

}

//绑定端口

if(bind(server_socket,(struct sockaddr*)&server_addr,sizeof(server_addr)))

{

printf("bind error\n");

exit(1);

}

//服务器端监听

if(listen(server_socket,LISTEN_QUEUE))

{

printf("Server listen error\n");

exit(1);

}

//服务器端一直运行

while(1)

{

pid_t pid;

struct sockaddr_in client_addr;

socklen_t length=sizeof(client_addr);

//accept返回一个新的套接字与客户端进行通信

int new_server_socket=accept(server_socket,(struct sockaddr*)&client_addr,&length);

//1*begin******************************************************************************

if(new_server_socket==-1)

{

printf("accept error\n");

continue;

}

else

{

printf("客户端%s连接成功\n",inet_ntoa(client_addr.sin_addr));

pid=fork();

//3*begin**运行子进程*************************************************************

if(pid==0)

{

int data_len,flag=0;

char buffer[BUFFER_SIZE];

// 定义文件流

FILE *stream;

bzero(buffer,BUFFER_SIZE);

strcpy(buffer,"请输入要传输的文件的完整路径：");

strcat(buffer,"\n");

send(new_server_socket,buffer,BUFFER_SIZE,0);

bzero(buffer,BUFFER_SIZE);

//2*begin**服务器接受数据*********************************************

if((stream=fopen("data","w"))==NULL)

{

printf("file open error\n");

exit(1);

}

else

{

bzero(buffer,BUFFER_SIZE);

}

// printf("正在接收来自%s的文件....\n",inet_ntoa(client_addr.sin_addr));

//先将数据接受到缓冲区buffer中，再写入到新建的文件中

while(data_len=recv(new_server_socket,buffer,BUFFER_SIZE,0))

{

flag++;

if(flag==1)

{

printf("正在接收来自%s的文件....\n",inet_ntoa(client_addr.sin_addr));

}

if(data_len<0)

{

printf("接收错误\n");

exit(1);

}

//向文件中写入数据

int write_len=fwrite(buffer,sizeof(char),data_len,stream);

if(write_len>data_len)

{

printf("file write failed\n");

exit(1);

}

bzero(buffer,BUFFER_SIZE);

}

if(flag>0)

printf("%s的文件传送完毕\n",inet_ntoa(client_addr.sin_addr));

if(flag==0)

printf("%s的文件传输失败\n",inet_ntoa(client_addr.sin_addr));

//2*end**服务器接受数据****************************************************

// rename("data",inet_ntoa(client_addr.sin_addr));

fclose(stream);

rename("data",inet_ntoa(client_addr.sin_addr));

exit(1);

}

//3*end**运行子进程**********************************************************

else

{

close(new_server_socket);

}

}

//1*end**************************************************************************************

close(new_server_socket);

}

return 0;

}

客户端：

#include

#include

#include

#include

#include

#include

#include

#include

#define SERVER_PORT 6666

#define BUFFER_SIZE 1024

int main(int argc,char **argv)

{

if(argc!=2)

{

printf("参数错误，清输入两个参数\n");

exit(1);

}

FILE *stream;

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; //internet协议族

server_addr.sin_addr.s_addr = inet_addr(argv[1]);

server_addr.sin_port = htons(SERVER_PORT);

int sfd;

sfd=socket(AF_INET,SOCK_STREAM,0);

if(sfd<0)

{

printf("socket error\n");

exit(0);

}

if(connect(sfd,(struct sockaddr*)&server_addr,sizeof(server_addr)) < 0)

{

printf("Can Not Connect To %s\n",argv[1]);

exit(1);

}

char buffer[BUFFER_SIZE];

bzero(buffer,BUFFER_SIZE);

int length = recv(sfd,buffer,BUFFER_SIZE,0);

if(length < 0)

{

printf("Recieve Data From Server %s Failed!\n", argv[1]);

exit(1);

}

printf("\n%s\n",buffer);

bzero(buffer,BUFFER_SIZE);

// fgets(buffer,1024,stdin);

// char filename[100];

gets(buffer);

//打开文件流

if((stream=fopen(buffer,"r"))==NULL)

{

printf("the file was not opened\n");

exit(1);

}

bzero(buffer,BUFFER_SIZE);

printf("正在传输...\n");

int len=0;

//不断读取并发送数据

while((len=fread(buffer,1,1024,stream))>0)

{

// printf("len=%d\n",len);

if(send(sfd,buffer,len,0)<0)

{

printf("send file error\n");

break;

}

bzero(buffer,BUFFER_SIZE);

}

if(fclose(stream))

{

printf("file close error\n");

exit(1);

}

close(sfd);

return 0;

}

服务器端运行：

客户端运行：

在服务器端的程序中，当一个客户端连接，就创建一个独立的进程