Simple server

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>

#define DIE(assertion, msg) \
     if (assertion ) { perror(msg); exit(EXIT_FAILURE); }

int main()
{
    struct sockaddr_in addr, raddr;
    int optval = 1, rc, fd, peerfd;
    unsigned rlen = sizeof(raddr);
    char send_buffer[] = "Mumu mimi meme mama";
    char recv_buffer[100];

    fd = socket(AF_INET, SOCK_STREAM, 0);
    DIE(fd < 0, "socket");

    rc = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
    DIE (rc < 0, "setsockopt");

    addr.sin_family = AF_INET;
    addr.sin_port = htons(8888);
    addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
    rc = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
    DIE(rc < 0, "bind");

    rc = listen(fd, 5);
    DIE(rc < 0, "listen");

    printf("[SERVER] Now wait for a client...\n");
    peerfd = accept(fd, (struct sockaddr *)&raddr, &rlen);
    DIE(peerfd < 0, "accept");

    printf("[SERVER] Client connected. Read something..\n");
    rc = recv(peerfd, recv_buffer, sizeof(recv_buffer) - 1, 0);
    DIE(rc < 0, "recv");

    recv_buffer[rc] = 0;
    printf("[SERVER] Received %s. Now sleep 20s\n", recv_buffer);

    sleep(20);

    rc = send(peerfd, send_buffer, sizeof(send_buffer), 0);
    DIE(rc < 0, "send");
    printf("[SERVER] send returned %d\n", rc);

    return close(fd);
}