SOCKET编程之使用AF_UNIX实现本机数据流通信示例

本程序由服务器端程序和客户端程序两部分组成。

服务器端程序

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <sys/un.h>

#include <sys/socket.h>

#include <sys/types.h>

#include <string.h>

int main()

{

 int server_sockfd,client_sockfd;

 int server_len,client_len;

 struct sockaddr_un server_address;

 struct sockaddr_un client_address;

 int i,byte;

 char ch_send,ch_rec;

 unlink("server_socket");

 server_sockfd=socket(AF_UNIX,SOCK_STREAM,0);

 if(server_sockfd==-1)

 {

  perror("socket");

  exit(1);

 }

 server_address.sun_family=AF_UNIX;

 strcpy(server_address.sun_path,"server_socket");

 server_len=sizeof(server_address);

 

 bind(server_sockfd,(struct sockaddr *)&server_address,server_len);

 listen(server_sockfd,5);

 printf("server waiting for client connect\n");

 client_len=sizeof(client_address);

 client_sockfd=accept(server_sockfd,(struct sockaddr *)&client_address,(socklen_t *)&client_len);

 printf("the server wait for client data\n");

 for(i=0,ch_send='1';i<5;i++,ch_send++)

 {

  if((byte=read(client_sockfd,&ch_rec,1))==-1)

  {

   perror("read");

   exit(1);

  }

  printf("the character receiver from client is %c\n",ch_rec);

  sleep(1);

  if(write(client_sockfd,&ch_send,1)==-1)

  {

   perror("write");

   exit(1);

  }

 

 }

 close(client_sockfd);

 unlink("server_socket");

 return 0;

}

客户端程序

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <sys/un.h>

#include <sys/socket.h>

#include <sys/types.h>

#include <string.h>

int main()

{

 int sockfd;

 int len;

 struct sockaddr_un address;

 int result;

 int i,byte;

 char ch_recv,ch_send;

 sockfd=socket(AF_UNIX,SOCK_STREAM,0);

 if(sockfd==-1)

 {

  perror("socket");

  exit(1);

 }

 address.sun_family=AF_UNIX;

 strcpy(address.sun_path,"server_socket");

 len=sizeof(address);

 result=connect(sockfd,(struct sockaddr*)&address,len);

 if(result==-1)

 {

  printf("ensure the server is up\n");

  perror("connect");

  exit(1);

 }

 for(i=0,ch_send='A';i<5;i++,ch_send++)

 {

  if(write(sockfd,&ch_send,1)==-1)

  {

   perror("write");

   exit(1);

  }

  if(read(sockfd,&ch_recv,1)==-1)

  {

   perror("read");

   exit(1);

  }

  printf("receive from server is %c\n",ch_recv);

 }

 close(sockfd);

 return 0;

}

这个是socket的API函数的基础应用，我在这个基础上改编了一个较为复杂的程序，但不利于理解，所以还是把这个原始的贴出来，供借鉴