#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

int main()
{
    int sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
    struct sockaddr_in addr;

    addr.sin_family = AF_UNIX;
    addr.sin_port = htons(9090);
    addr.sin_addr.s_addr = inet_addr("127.0.0.1");
    memset(addr.sin_zero, '\0', sizeof addr.sin_zero);

    bind(sockfd, (struct sockaddr *)&addr, sizeof addr);
    listen(sockfd, 5);

    struct sockaddr_in recvd;
    int size = sizeof(recvd);

    int afd = accept(sockfd, (struct sockaddr *)&recvd, &size);
    char recvbuf[256];
    memset(recvbuf, 0, sizeof(recvbuf));

    recv(afd, recvbuf, sizeof(recvbuf), 0);
    printf("%s\n", recvbuf);

    send(afd, recvbuf, strlen(recvbuf), 0);
    close(afd);
    close(sockfd);
    return 0;
}