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

int open_listenfd(int port)
{
    int listenfd, optval = 1;
    struct sockaddr_in serveraddr;

    if ((listenfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
        return -1;

    if (setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR,
                   (const void *) &optval, sizeof(int)) < 0)
        return -1;

    bzero((char *) &serveraddr, sizeof(serveraddr));
    serveraddr.sin_family = AF_INET;
    serveraddr.sin_addr.s_addr = htonl(INADDR_ANY);
    serveraddr.sin_port = htons((unsigned short) port);
    if (bind(listenfd, (struct sockaddr *) &serveraddr, sizeof(serveraddr)) < 0)
        return -1;

    if (listen(listenfd, 1) < 0)
        return -1;
    return listenfd;
}


int main(int argc, char **argv)
{
    int listenfd, port;
	int clientlen, connfd;

    struct sockaddr_in clientaddr;
	char filename[50];
	filename = argv[1];

	port = atoi(argv[2]);
    listenfd = open_listenfd(port);
	while(1)
	{
		clientlen = sizeof(clientaddr);
		connfd = accept(listenfd, (struct sockaddr *) &clientaddr, &clientlen);
		printf("server started\n");

	}
	return 0;
}