god.h

NS2网络仿真软件是目前最为流行的网络仿真模拟软件

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 *	This product includes software developed by the Computer Systems
 *	Engineering Group at Lawrence Berkeley Laboratory.
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/* Ported from CMU/Monarch's code, nov'98 -Padma.*/
/* -*- c++ -*-
   god.h

   General Operations Director

   perform operations requiring omnipotence in the simulation
   */

#ifndef __god_h
#define __god_h

#include <stdarg.h>
#include "bi-connector.h"
#include "object.h"
#include "packet.h"
#include "trace.h"

#include "node.h"
#include "diffusion/hash_table.h"


// Added by Chalermek  12/1/99

#define MIN_HOPS(i,j)    min_hops[i*num_nodes+j]
#define NEXT_HOP(i,j)    next_hop[i*num_nodes+j]
#define SRC_TAB(i,j)     source_table[i*num_nodes+j]
#define SK_TAB(i,j)      sink_table[i*num_nodes+j]
#define	UNREACHABLE	 0x00ffffff
#define RANGE            250.0                 // trasmitter range in meters


class NodeStatus {
public:
  bool is_source_;
  bool is_sink_;
  bool is_on_trees_;

  NodeStatus() { is_source_ = is_sink_ = is_on_trees_ = false; }
};


// Cut and Paste from setdest.h   -- Chalermek 12/1/99

class vector_ns {
public:
	vector_ns(double x = 0.0, double y = 0.0, double z = 0.0) {
		X = x; Y = y; Z = z;
	}
	double length() {
		return sqrt(X*X + Y*Y + Z*Z);
	}

	inline void operator=(const vector_ns a) {
		X = a.X;
		Y = a.Y;
		Z = a.Z;
	}
	inline void operator+=(const vector_ns a) {
		X += a.X;
		Y += a.Y;
		Z += a.Z;
	}
	inline int operator==(const vector_ns a) {
		return (X == a.X && Y == a.Y && Z == a.Z);
	}
	inline int operator!=(const vector_ns a) {
		return (X != a.X || Y != a.Y || Z != a.Z);
	}
	inline vector_ns operator-(const vector_ns a) {
		return vector_ns(X-a.X, Y-a.Y, Z-a.Z);
	}
	friend inline vector_ns operator*(const double a, const vector_ns b) {
		return vector_ns(a*b.X, a*b.Y, a*b.Z);
	}
	friend inline vector_ns operator/(const vector_ns a, const double b) {
		return vector_ns(a.X/b, a.Y/b, a.Z/b);
	}

	double X;
	double Y;
	double Z;
};

// ------------------------


class God : public BiConnector {
public:
        God();

        int             command(int argc, const char* const* argv);

        void            recv(Packet *p, Handler *h);
        void            stampPacket(Packet *p);

        int initialized() {
                return num_nodes && min_hops && uptarget_;
        }

        int             hops(int i, int j);
        static God*     instance() { assert(instance_); return instance_; }
	int nodes() { return num_nodes; }

        inline void getGrid(double *x, double *y, double *z) {
		*x = maxX; *y = maxY; *z = gridsize_;
	}


  // Added by Chalermek 12/1/99

        int  data_pkt_size;        // in bytes. 
        int  num_alive_node;
        int  num_connect;
        int  num_recv;
        int  num_compute;          // number of route-computation times
        double prev_time;          // the previous time it computes the route
        int  num_data_types;      
        int  **source_table;
        int  *sink_table;
        int  *num_send;            // for each data type
        Data_Hash_Table dtab;

        void DumpNodeStatus();
        void DumpNumSend();
        void CountNewData(int *attr);
        void IncrRecv();
        bool ExistSource();
        bool ExistSink();
        bool IsPartition();
        void StopSimulation();
        void CountConnect();
        void CountAliveNode();
        void ComputeRoute();      
        int  NextHop(int from, int to);
        void ComputeNextHop();     // Look at min_hops to fill in next_hop
        void Dump();               // Dump all internal data
        bool IsReachable(int i, int j);  // Is node i reachable to node j ?
        bool IsNeighbor(int i, int j);   // Is node i a neighbor of node j ?
        void ComputeW();           // Initialize the connectivity metrix
        void floyd_warshall();     // Calculate the shortest path

        void AddSink(int dt, int skid);
        void AddSource(int dt, int srcid);
        void Fill_for_Sink(int dt, int srcid);
        void Fill_for_Source(int dt, int skid);
        void Rewrite_OIF_Map();
        void UpdateNodeStatus();
        
        // Return number of next oifs in ret_num_oif.
        // Return array of next oifs as return value of the function.

        int *NextOIFs(int dt, int srcid, int curid, int *ret_num_oif);
  
        // serve for GAF algorithm
  
        int load_grid(int,int,int);

        int getMyGrid(double x, double y);
        int getMyLeftGrid(double x, double y);
        int getMyRightGrid(double x, double y);
        int getMyTopGrid(double x, double y);
        int getMyBottomGrid(double x, double y);
        
        inline int getMyGridSize() {
		return gridsize_;
	}

  // -----------------------


private:
        int num_nodes;
        int* min_hops;   // square array of num_nodesXnum_nodes
                         // min_hops[i * num_nodes + j] giving 
			 // minhops between i and j
        static God*     instance_;


        // Added by Chalermek    12/1/99

        bool active;
        bool allowTostop;
        MobileNode **mb_node; // mb_node[i] giving pointer to object 
                              // mobile node i
        NodeStatus *node_status;
        int *next_hop;        // next_hop[i * num_nodes + j] giving
                              //   the next hop of i where i wants to send
                              //	 a packet to j.

        int maxX;          // keeping grid demension info: max X, max Y and 
        int maxY;          // grid size
        int gridsize_;
        int gridX;
        int gridY;

};

#endif