#ifndef __CONSTANTS_H__
#define __CONSTANTS_H__

#include <linux/unistd.h>


//_syscall2(int, add_routable_node, unsigned int, arg1, int, arg2);


typedef enum {FALSE, TRUE} BOOL;
typedef enum {INACTIVE, UNCLUSTERED, ORPHAN, PARENT, CHILD} STATE;
typedef enum {SET, UNSET} FLAGS;

// added a new event, CHG_CLUSTER, to reflect any change to the cluster
// by addition of new orphans or new unclustered nodes

typedef enum {NODE_ACTIVATION, RCV_JOIN_REQUEST, RCV_JOIN_RESPONSE, \
			RCV_ADOPT_REQUEST, RCV_ADOPT_RESPONSE, JOIN_TIMER_EXPIRATION, \
			ADOPT_TIMER_EXPIRATION, HELLO_TIMER_EXPIRATION, CLUSTER_DISCONNECTION, \
			CLUSTER_PARTITION, CLUSTER_EXPANSION, RCV_JOIN_CLUSTER, \
			RCV_HELLO_MSG, RCV_MAX_CLUSTER, RCV_GATEWAY, \
			RCV_NOT_GATEWAY, NO_EVENT} EVENT;		

typedef enum {JOIN_REQUEST, JOIN_RESPONSE, ADOPT_REQUEST, ADOPT_RESPONSE, JOIN_CLUSTER/*the final confirmation between child and parent*/, HELLO_MSG, GATEWAY, MAX_CLUSTER, NOT_GATEWAY} MSG_TYPE; 


typedef enum {JOIN_TIMER, ADOPT_TIMER, HELLO_TIMER} TIMER;//for the which portion of setTimer 
typedef enum {RREQ, RREP} ROUTING_PKT_TYPE;
		
typedef enum {PKT_DDCA, PKT_ROUTING, PKT_QRY} DDCA_PROTO;

typedef enum {NO_GATEWAY, IS_GATEWAY} NODE_STATUS;

typedef enum {DELETE_GW, ADD_GW, CHG_STATE, DELETE_RT, ADD_RT, RET_STATE} PROC_ENTRIES;

const int CLOCK_PRECISON = 10;
const int IPPROTO_DDCA = 65;//our ddca protocol number

const char BCAST_ADDR [] = "255.255.255.255";

const int IP_HEADER_LENGTH = 20; //fixed length of the IP packet

const int DDCA_LEN = 36; // length of DDCA packet excluding 20 bytes of ip header

const int MAX_CLUSTER_SIZE = 2;//maximum nodes in a cluster

const int RTENTRY_ALIVE_LIMIT = 2; // number of hello expirations for a 
			// routing entry to be alive

const int REPLY_TIMEOUT = 100;
const int MIN_GRANULARITY = 1;
#endif /*__CONSTANTS_H__*/