linux文件传输

最近一直在学习unix网络编程，在最开始传输图片的文件老是会出现多出些字节，后面经过测试和参考网上的文章发现是在处理文件的读和写的最后没有处理好出现了这些问题。现在把程序改进了下，测试了可以传输其它类型的文件。下面一步就是编写视频传输的程序。

server.c

 

#include
#include
#include
#include
#include
#include

#define MAXSIZE 100

int main(int argc,char **argv)
{

  int server_sockfd,client_sockfd;
  int server_len,client_len;
  char ch[MAXSIZE];
  struct sockaddr_in server_address;
  struct sockaddr_in client_address;

  if (argc != 2)
   {
      printf("server:file name\n");
      exit(1);
   }

  server_sockfd = socket(AF_INET,SOCK_STREAM,0);
  if(server_sockfd <0)
    {
     printf("Creating socket error!\n");
     exit(1);
     }

    bzero(&server_address,sizeof(struct sockaddr_in));
    server_address.sin_family = AF_INET;
    server_address.sin_addr.s_addr = htonl(INADDR_ANY);
    server_address.sin_port = htons(5000);
    server_len = sizeof(server_address);

    int opt = 1;
    setsockopt(server_sockfd,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt));

    if(bind(server_sockfd,(struct sockaddr *)&server_address,server_len) < 0)
      {
         perror("Bind error.");
         exit(1);
      }

     if(listen(server_sockfd,5) == -1)
       {
         printf("listen error!\n");
         exit(1);
         }
    
     client_len = sizeof(client_address);
     client_sockfd = accept(server_sockfd,(struct sockaddr *)&client_address, &client_len);
     if(client_sockfd == -1)
       {
         printf("accept error!\n");
         exit(1);
        }
 
      FILE *fd = fopen(argv[1],"rb");
      if (fd == NULL)
      {
        printf("file open error!\n");
        exit(2);
      }
       while(!feof(fd))
        {
          int len = fread(ch,1,MAXSIZE,fd);
          write(client_sockfd,ch,len);
         }

      close(client_sockfd);
      fclose(fd);
       return 0;

}

 

client.c

 

#include
#include
#include
#include
#include
#include
#include
#include
#include
#define MAXSIZE 100

int main(int argc,char **argv)
{
  int sockfd,len;
  int result,count;
  char recvs[MAXSIZE];
  struct sockaddr_in address;
  struct hostent *host;
 
  if (argc != 3)
  {
   printf("client ip filename\n");
   exit(1);
  }
 
  host = gethostbyname(argv[1]) ;
 if(( sockfd = socket(AF_INET,SOCK_STREAM,0))== -1)
 {
  printf("socket create error!\n");
  exit(1);
 }
 
  bzero(&address,sizeof(address));
  address.sin_family = AF_INET;
  address.sin_addr = *((struct in_addr *)host->h_addr);
  address.sin_port = htons(5000);

  int opt = 1;
  setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt));
 
  len = sizeof(address);
  result = connect(sockfd,(struct sockaddr *)&address,len);
  if (result == -1)
   {
     perror("client");
     exit(1);
    }
 
 
   FILE *fd = fopen(argv[2],"wb");
   if (fd == NULL)
   {
    printf("create file error!\n");
    exit(1);
   }
  
   while(1){
   count = read(sockfd,recvs,MAXSIZE);
   if (count ==0)
    break;
  
   fwrite(recvs,1,count,fd);
  }
  
   close(sockfd);
   fclose(fd);
   return 0;

}