[LOB]Level20. death_knight

/*
        The Lord of the BOF : The Fellowship of the BOF
        - dark knight
        - remote BOF
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <dumpcode.h>

main()
{
    char buffer[40];

    int server_fd, client_fd;
    struct sockaddr_in server_addr;
    struct sockaddr_in client_addr;
    int sin_size;

    if((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1){
        perror("socket");
        exit(1);
    }

    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(6666);
    server_addr.sin_addr.s_addr = INADDR_ANY;
    bzero(&(server_addr.sin_zero), 8);

    if(bind(server_fd, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1){
        perror("bind");
        exit(1);
    }

    if(listen(server_fd, 10) == -1){
        perror("listen");
        exit(1);
    }

    while(1) {
        sin_size = sizeof(struct sockaddr_in);
        if((client_fd = accept(server_fd, (struct sockaddr *)&client_addr, &sin_size)) == -1){
            perror("accept");
            continue;
        }

        if (!fork()){
            send(client_fd, "Death Knight : Not even death can save you from me!\n", 52, 0);
            send(client_fd, "You : ", 6, 0);
            recv(client_fd, buffer, 256, 0);
            close(client_fd);
            break;
        }

        close(client_fd);
        while(waitpid(-1,NULL,WNOHANG) > 0);
    }
    close(server_fd);
}