//本地套接字客户端
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/un.h>

int main()
{
    //创建socket
    int cfd = socket(AF_UNIX, SOCK_STREAM, 0);
    if(cfd < 0)
    {
        perror("socket error");
        return -1;
    }

    //删除socket文件，避免bind失败
    unlink("./client.sock");
    //绑定本机文件路径，这里需要绑定是因为希望知道客户端信息
    struct sockaddr_un client;
    bzero(&client, sizeof(client));
    client.sun_family = AF_UNIX;
    strcpy(client.sun_path, "./client.sock");
    int ret = bind(cfd, (struct sockaddr *)&client, sizeof(client));
    if(ret < 0)
    {
        perror("bind error");
        return -1;
    }    
    //连接服务端(需要知道服务端的信息)
    struct sockaddr_un serv;
    bzero(&serv, sizeof(serv));
    serv.sun_family = AF_UNIX;
    strcpy(serv.sun_path, "./server.sock");
    ret = connect(cfd, (struct sockaddr *)&serv, sizeof(serv));
    if(ret < 0)
    {
        perror("connect error");
        return -1;
    }

    int n;
    char buf[1024];

    while(1)
    {
        memset(buf, 0x00, sizeof(buf));
        //读标准输入
        n = read(STDIN_FILENO, buf, sizeof(buf));
        //发送数据
        write(cfd, buf, n);

        //读数据
        memset(buf, 0x00, sizeof(buf));
        n = read(cfd, buf, sizeof(buf));
        if(n <= 0)
        {
            printf("read error or client close, n==[%d]\n", n);
            break;
        }

        printf("n == [%d], buf == [%s]\n", n, buf);
        
    }
    close(cfd);
    return 0;
}