node.h

模拟器提供了一个简单易用的平台

/*
 * File: node.h
 * Author: Suman Banerjee <[e-mail]>
 * Date: July 31, 2001
 * Terms: GPL
 *
 * myns simulator
 */

#ifndef _NODE_H_
#define _NODE_H_

#include <linked-list.h>
#include <packet.h>
#include "scheduler.h"
#include <timer.h>
#include "rt.h"


enum NodeEventType {
  NODE_START,
  NODE_STOP,
  RECV_PACKET
};

struct NodeEvent {
  NodeEventType t;
  Packet *p;

  NodeEvent (NodeEventType type, Packet *pkt) {
    t = type;
    p = pkt;
  }

};

class Node;

struct NeighborInfo {
  Node *n;
  double cost; /* Link cost */

  NeighborInfo (Node *N, double c) {
   n = N;
   cost = c;
  };
};

class Agent;

class Node {
  public :

    int id; // Id assigned to the node
  int index; // Index of this node in node array
  bool started; // If the node is active currently or not

  LinkedList<NeighborInfo*,int> neighbor_list;

  RoutingTable *rt;

  Agent *a;

  Node(void);
  virtual ~Node (void);

  inline int get_id (void) { return id; }
  void start (void);
  void stop (void);
  /* void InitRT (int num_nodes); */

  inline bool is_started (void) { return started; }

  void send_pkt(Packet *p, int dst);
  void tx_pkt (Packet *p, Node *next_hop, double link_delay, bool instant_route_pkt);
  bool forward_pkt (Packet *p);
  void rx_pkt_handler(Packet *p);

  /* This would be used in the derived class to do some specific
   * processing on each packet received at a node.
   * Mostly this would be for statistic maintenance hooks.
   */
  virtual void specific_tx_pkt (Packet *p, int dst) {};
  virtual void specific_rx_pkt_handler (Packet *p, bool is_src) {};

  void display_packet (Packet *p, char *prefix);
  void add_neighbor (Node *n, double cost);
  void empty_neighbor_list (void);

  void EventHandler (NodeEvent *ne);

  virtual void display_on_stop_simulation (void) {};
};

#endif