linux网络编程----发送与接收文件

最新推荐文章于 2023-03-13 21:57:14 发布

原创最新推荐文章于 2023-03-13 21:57:14 发布 · 971 阅读

6 ·

CC 4.0 BY-SA版权

文章标签：

#linux #编程 #网络 #struct #fp #socket

linux 专栏收录该内容

4 篇文章

订阅专栏

该博客介绍了如何使用Linux网络编程实现文件的发送与接收。通过创建套接字，绑定，监听，接受连接，然后从文件读取数据并发送到接收端。示例代码涉及了socket，bind，listen，accept，send等关键函数的使用。

文件的发送端：

#include <stdio.h>

#include <stdlib.h>

#include <sys/socket.h>

#include <netinet/in.h>

#define MAXSIZE 1024

int main()
{
   FILE *fp;
   int sockfd,recvfd;
   char buf[MAXSIZE];
   struct sockaddr_in my_addr;
   struct sockaddr_in remote_addr;
   socklen_t sin_size = sizeof(struct sockaddr_in);

   if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
   {
       perror("socket error");
       exit(-1);
   }

   my_addr.sin_family = AF_INET;
   my_addr.sin_port = htons(4444);
   my_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
   bzero(&(my_addr.sin_zero), 8);

   if(bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) == -1)
    {
       perror("bind error");
       exit(-1);
   }

   if(listen(sockfd, 10) == -1)
   {
       perror("listen error");
       exit(-1);
   }

   if((recvfd = accept(sockfd, (struct sockaddr *)&remote_addr, &sin_size)) == -1)
   {
       perror("accept error");
       exit(-1);
   }
   printf("sending data....\n");

   if((fp = fopen("/home/liumr/work-liumr/Pearl.Harbor.8.mp4","r")) == NULL)
   {
       printf("can't open file\n");
       exit(-1);
   }

   while(1)
   {
       if(fgets(buf, 100, fp) == NULL)
       {
           close(recvfd);
           close(sockfd);
           printf("send over\n");
           exit(-1);
       }
       if(send(recvfd, buf, 100, 0) == -1)
       {
           perror("send error");
           close(recvfd);
           exit(-1);
       }
       printf("send data!!\n");
       sleep(1);
   }

   close(fp);
   close(recvfd);
   close(sockfd);

}

文件的接收端：

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>

#define MAXSIZE 1024

int main(int argc, char **argv)
{
   int sockfd,recvbytes;
   char buf[MAXSIZE];
   FILE *fp;
   struct sockaddr_in serv_addr;
   if(argc < 2)
   {
       fprintf(stderr, "Please enter the server's ip\n");
       exit(-1);
   }

   if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
   {
       perror("socket error");
       exit(-1);
   }

   serv_addr.sin_family = AF_INET;
   serv_addr.sin_port = htons(4444);
   serv_addr.sin_addr.s_addr = INADDR_ANY;
   bzero(&(serv_addr.sin_zero), 8);

   if(connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(struct sockaddr)) == -1)
   {
       perror("connect error");
       exit(-1);
   }

   if((fp = fopen("file.mp4","w")) == NULL)
   {
       printf("can't open file\n");
       exit(-1);
   }

   while(1)
   {
       memset(buf, 0, 100);
       recvbytes = recv(sockfd, buf, 100, 0);
       if(recvbytes == 0)
       {
           printf("receive over!!\n");
           close(fp);
           close(sockfd);
           exit(0);
       }
       printf("receive data!!\n");
       fprintf(fp,"%s",buf);
       sleep(1);
   }
   close(fp);
   close(sockfd);
   return 0;
}