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#include <stdio.h>
#include <sys/socket.h>
#include <resolv.h>
#include <netdb.h>

int main()
{

	struct sockaddr_in dest;
	struct sockaddr_in my_dest;
	struct hostent *host;
	struct hostent *my_host;
	char hostname[50];
	char my_hostname[50];
	int my_sock;
	int sock;
	int bytes_read;
	int bytes_send;
	short int portnum;
	int MAXBUF = 1000;
	char buffer[MAXBUF];
	char tosend[MAXBUF];
	struct sockaddr_in list;
	struct sockaddr_in client;
	int listsock;
	int my_port = 0;
	int i = 0;
	int high_counter = 0;
	int low_counter = 0;
	int main_counter = 0;
	char store_chars[10];
	char *store_high;
	char *store_low;
	int j = 0;
	my_sock = socket(PF_INET, SOCK_STREAM, 0);
	sock = socket(PF_INET, SOCK_STREAM, 0);
	listsock = socket(PF_INET, SOCK_STREAM, 0);
	bzero(&list, sizeof(list));
	list.sin_family = AF_INET;
	list.sin_port = htons(2397);
	list.sin_addr.s_addr = INADDR_ANY;
	/*if (bind(listsock, (const struct sockaddr *)&list, sizeof(list)) != 0)
	printf("ERROR IN BIND!");
	if (listen(listsock, 20) != 0)
	printf("ERROR IN LISTEN!");*/

	printf("Insert server address: ");
	scanf("%s", hostname);

	printf("Insert port number: ");
	scanf("%i", &portnum);

	host = gethostbyname(hostname);
	bzero(&dest, sizeof(dest));
	dest.sin_family = AF_INET;
	dest.sin_port = htons(portnum);
	dest.sin_addr.s_addr = *(long*)(host->h_addr);
	if (connect(sock,(struct sockaddr *)&dest, sizeof(dest)) != 0)
	{
		printf("Connection fail!\n");
		abort();
	}

	bytes_read = read(sock, buffer, MAXBUF-1);
	printf("Server's answer:\t%s", buffer);
	bzero(buffer, MAXBUF);
	printf("\nUsername? ");
	scanf("%s", buffer);
	sprintf(tosend,"user %s\r\n", buffer);
	bytes_send = send(sock, tosend, strlen(tosend), 0);

	bzero(buffer, MAXBUF);
	bytes_read = recv(sock, buffer, MAXBUF-1, 0);
	printf("Server's answer:\t%s", buffer);

	bzero(buffer, MAXBUF);
	printf("Password? ");
	scanf("%s", buffer);
	bzero(tosend, MAXBUF);
	sprintf(tosend, "pass %s\r\n", buffer);
	bytes_send = send(sock, tosend, strlen(tosend), 0);
	//printf("%s", tosend);
	bzero(buffer, MAXBUF);
	bytes_read = recv(sock, buffer, MAXBUF-1, 0);
	printf("Server's answer:\t%s", buffer);
	bzero(buffer, MAXBUF);
	bzero(tosend, MAXBUF);
	sprintf(tosend, "PASV\n");
	bytes_send = send(sock, tosend, strlen(tosend), 0);
	bytes_read = recv(sock, buffer, MAXBUF, 0);
	printf("Server's answer:\t%s", buffer);
	//==========================================================================
	//printf("%d\n" , strlen(buffer));
	for(i = 37; i < strlen(buffer);i++)
	{
		if(buffer[i] == ')' ){
			low_counter = main_counter - high_counter;
			break;
		}
		if(buffer[i]!=')' && buffer[i] != ',')
		{
			//printf("%c\n",buffer[i]);
			store_chars[main_counter] = buffer[i];
			main_counter++;
		}
		if(buffer[i] == ','){
			high_counter = main_counter;
		}
	}
	//printf("main counter = %d , high counter = %d , low counter = %d\n",main_counter,high_counter,low_counter);
	//for(i = 0 ; i < main_counter ; i++)
	//{
	//	printf("store %c\n",store_chars[i]);
	//}
	store_high = (char *)malloc(high_counter);
	store_low = (char *)malloc(low_counter);
	for(i = 0 ; i < high_counter ; i++){
		store_high[i] = store_chars[i];
	}
	for(i = 0 ; i < high_counter ; i++){
		//printf("%c\n",store_high[i]);
	}
	for(i=0;i<low_counter;i++)
	{
		store_low[i] = store_chars[high_counter+i];
	}
	
	my_port = atoi(store_high) * 256;
	my_port = my_port + atoi(store_low);
	printf("port = %d\n" , my_port);

	bzero(tosend, MAXBUF);
	sprintf(tosend, "LIST\n");
	bytes_send = send(sock, tosend, strlen(tosend), 0);
	//---------------------------------------------------------
	 
	

	my_host = gethostbyname(hostname); 
	bzero(&my_dest, sizeof(my_dest));
	my_dest.sin_family = AF_INET;
	my_dest.sin_port = htons(my_port);
	my_dest.sin_addr.s_addr = *(long*)(my_host->h_addr);
	if (connect(my_sock, (struct sockaddr *)&my_dest, sizeof(my_dest)) != 0)
	{
  		printf("Connection fail!\n");
  		abort();
	}
	bytes_read = recv(my_sock, buffer, MAXBUF-1, 0);
	//printf("Server's answer:\t%s", buffer);
	/*bzero(tosend, MAXBUF);
	sprintf(tosend, "LIST\n");
	bytes_send = send(my_sock, tosend, strlen(tosend), 0);
	bzero(buffer, MAXBUF);
	bytes_read = recv(my_sock, buffer, MAXBUF-1, 0);
	printf("Server's answer:\t%s", buffer);*/
	//---------------------------------------------------------
	bzero(tosend, MAXBUF);
	bzero(buffer, MAXBUF);
	sprintf(tosend, "QUIT\n");
	bytes_send = send(sock, tosend, strlen(tosend), 0);
	shutdown(listsock, 2);
	shutdown(sock, 2);
	bzero(tosend, MAXBUF);
}

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