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path: root/friendfinder/receiver.c
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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <libircclient.h>

#include "openssl/blowfish.h"
#include "draw_user.h"
#include "read_file.h"

static irc_session_t *session;
irc_callbacks_t callbacks;

char sender_name[100];
char own_nickname[100];
char *receiver_server_ip;

int username_length;

struct sender **s_sender;
int s_sender_size;

BF_KEY key;

void receiver_set_ip(char *_ip)
{
	receiver_server_ip = _ip;
}

int init_connection_receiver(char* server_ip, char* user)
{
	printf("RECEIVER: initialising connection...\n");	
	
	session = irc_create_session(&callbacks);
	int con = irc_connect(session, server_ip, 6666, NULL, user, "receiver", "receiver");
	if (con != 0)
	{
		printf("RECEIVER: connection error-code: %i \n", con);

		return 1;
	}

	if (irc_is_connected(session) == 1)
	{
		printf("RECEIVER: connected...\n");
		
		return 0;
	}
}

void disconnect_receiver()
{
	irc_disconnect(session);
	irc_destroy_session(session);
	printf("RECEIVER: disconnected...\n");
}

int get_sender_array_pos(char* nick)
{
	for (int i = 0; i < s_sender_size; i++)
	{
		if (s_sender[i]->is_init == 1 && strcmp(s_sender[i]->nick, nick) == 0)
		{
			return i;
		}

		if (s_sender[i]->is_init == 0 && strcmp(s_sender[i]->nick, nick) != 0)
		{
			s_sender[i]->is_init = 1;
			s_sender[i]->nick = nick;

			return i;
		}
	}
}

void dump_data(char* lat, char* lon, char* nick)
{
	struct position *pos = (struct position*) malloc(sizeof(struct position));
	pos->lat = lat;
	pos->lon = lon;
	pos->nick = nick;

	draw_user(pos);
}

void get_position(irc_session_t * session, const char * event, const char * origin, const char ** params, unsigned int count)
{
	char *decrypted;
	
	char *sender_org = (char*) malloc(username_length + 1);
	
	irc_target_get_nick(origin, sender_name, sizeof(sender_name));
	strncpy(sender_org, sender_name, username_length);
	sender_org[username_length] = '\0';

	if (strcmp(sender_org, own_nickname) != 0 && strcmp(sender_name, "_s") > 0 && strcmp(params[1], "connected") != 0 
		&& strcmp(params[1], "ack") != 0) 
	{
		int pos = get_sender_array_pos(sender_org);

		if (s_sender[pos]->lat_set == 0)
		{
			decrypted = (char*) malloc(sizeof(char) * 8);
			BF_ecb_encrypt(params[1], decrypted, &key, BF_DECRYPT);
			s_sender[pos]->lat = decrypted;
		//	printf("s_sender[%i]->lat: %s \n", pos, s_sender[pos]->lat);
			s_sender[pos]->lat_set = 1;
		}

		else if (s_sender[pos]->lon_set == 0)
		{
			decrypted = (char*) malloc(sizeof(char) * 8);
			BF_ecb_encrypt(params[1], decrypted, &key, BF_DECRYPT);
			s_sender[pos]->lon = decrypted;
		//	printf("s_sender[%i]->lon: %s \n", pos, s_sender[pos]->lon);			
			s_sender[pos]->lon_set = 1;
		}
		
		if(s_sender[pos]->lon_set == 1 && s_sender[pos]->lat_set == 1)// && lon != NULL && lat != NULL)
		{
			double _lat, _lon;
			_lat = atof(s_sender[pos]->lat);
			_lon = atof(s_sender[pos]->lon);
			
			if (_lat > _lon && _lat == _lat && _lon == _lon)
			{
				dump_data(s_sender[pos]->lat, s_sender[pos]->lon, s_sender[pos]->nick);
			}
	
			if (_lat < _lon && _lat == _lat && _lon == _lon)
			{
				dump_data(s_sender[pos]->lon, s_sender[pos]->lat, s_sender[pos]->nick);
			}

			s_sender[pos]->lon_set = 0;
			s_sender[pos]->lat_set = 0;

			free(decrypted);
			free(sender_org);
		}	
		
		irc_cmd_msg(session, "#test", "ack");
	}
}

void init_sender_struct(int number)
{
	s_sender = (struct sender(*)[number]) malloc(sizeof(struct sender*) * number);
	s_sender_size = number;	

	for (int i = 0; i < number; i++)
	{
		s_sender[i] = (struct sender*) malloc(sizeof(struct sender));
		
		s_sender[i]->nick = (char*) malloc(sizeof(char) * 20);
		s_sender[i]->lat = (char*) malloc(sizeof(char) * 8);
		s_sender[i]->lon = (char*) malloc(sizeof(char) * 8);
	
		s_sender[i]->is_init = (int) malloc(sizeof(int));
		s_sender[i]->is_init = 0;

		s_sender[i]->lat_set = (int) malloc(sizeof(int));
		s_sender[i]->lat_set = 0;
		
		s_sender[i]->lon_set = (int) malloc(sizeof(int));	
		s_sender[i]->lon_set = 0;
	}
}

void on_connect_receiver(irc_session_t * session, const char * event, const char * origin, const char ** params, unsigned int count)
{
	printf("RECEIVER: on_connect_receiver \n");

	struct key_data *keyd = (struct key_data*) malloc(sizeof(struct key_data));
	keyd->key = (char*) malloc(sizeof(char) * 300);	

	keyd = read_key();
	BF_set_key(&key, keyd->key_length, keyd->key);	
	
	init_sender_struct(3);		
	
	irc_cmd_join(session, "#test", NULL);	
	irc_cmd_msg(session, "#test", "connected"); 	
}

void receiver_main(void *user)
{
	memset(&callbacks, 0, sizeof(callbacks));
	
	callbacks.event_channel = get_position;
	callbacks.event_connect = on_connect_receiver;
	
	char username[20];
	sprintf(username, "%s", (char*) user);
	sprintf(own_nickname, "%s", username);	
	username_length = strlen(username);

	if (receiver_server_ip != NULL && user != NULL)
	{
		strcat(username, "_r");
		
		if (init_connection_receiver(receiver_server_ip, username) == 0)
		{
			printf("RECEIVER: connection succesfull...\n");

			irc_run(session);
		}
	}
	
	else
	{
		printf("RECEIVER: error ip not set! Receiver can't be started\n");
	}
}