server.c

//server
#include<stdio.h>
#include<sys/socket.h>
#include<sys/types.h>
#include<sys/un.h>

#include "define.h"
 
int main(){
 
    socklen_t clt_addr_len;
    int listen_fd;
    int com_fd;
    int ret;
    int i;
    static char rcv_buff[1024];
    int len;
    struct sockaddr_un clt_addr;
    struct sockaddr_un srv_addr;
    listen_fd=socket(AF_UNIX,SOCK_STREAM,0);
    if(listen_fd<0){
    perror("connect creat communication socket");
    }
    // set srv_addr param
    srv_addr.sun_family=AF_UNIX;
    strncpy(srv_addr.sun_path,UNIX_DOMAIN,sizeof(srv_addr.sun_path)-1);
    unlink(UNIX_DOMAIN);
    //bind sockfd&addr
    ret=bind(listen_fd,(struct sockaddr*)&srv_addr,sizeof(srv_addr));
    if(ret<0){
    perror("cannot bind server socket");
    close(listen_fd);
    unlink(UNIX_DOMAIN);
    return -1;
    }
    //listen sockfd
    ret=listen(listen_fd,1);
    if(ret<0){
     perror("cannot listen sockfd");
     close(listen_fd);
     unlink(UNIX_DOMAIN);
     return -1;
    }
    //have connect requst use accept
    len=sizeof(clt_addr);
    com_fd=accept(listen_fd,(struct sockaddr*)&clt_addr,&len);
    if(com_fd<0){
    perror("cannot accept requst");
    close(listen_fd);
    unlink(UNIX_DOMAIN);
    return -1;
    }
    //read and printf client send info
    printf("\n******info********\n");
    //for(i=0,i<4,i++){
    for(i=0;i<4;i++){
    memset(rcv_buff,0,1024);
    int num = read(com_fd,rcv_buff,sizeof(rcv_buff));
    printf("message from client %d : %s\n",num,rcv_buff);
    }
    close(com_fd);
    close(listen_fd);
    unlink(UNIX_DOMAIN);
    return 0;
 
}