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

main()
{
    int sockfd, newsockfd, portno, clilen, n;
    struct sockaddr_in serv_addr, cli_addr;
    char buffer[256];

    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if(sockfd<0)
	error("HIBA a socket megnyitásakor");

    bzero((char *) &serv_addr, sizeof(serv_addr));
    portno = 12345;

    serv_addr.sin_family = AF_INET;

    serv_addr.sin_port = htons(portno);
    serv_addr.sin_addr.s_addr = INADDR_ANY;

    if(bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)))
	error("HIBA a binding során");
    listen(sockfd, 1);
    clilen = sizeof(cli_addr);
    newsockfd = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen);
    if(newsockfd<0) error("HIBA a fogadás során");
    bzero(buffer, 256);
    while(newsockfd)
    {
	n = read(newsockfd, buffer, 255);
	if(n < 0 )
	    error("HIBA a socket olvasása során");
	printf("%s\n", buffer);
	char uzi[10] = "uzike\n";
	n = write(newsockfd, uzi, strlen(uzi));
	if(n<0) error("HIBA a sockat írása során");
    }

}