/*********************************************************************/
/*                                                                   */
/* Courtesy Jim Kurose and Keith Ross, from their text               */
/*                                                                   */
/* Computer Networking: A Top-Down Approach Featuring the Internet,  */
/* 3rd edition                                                       */
/*                                                                   */
/*********************************************************************/

#include <stdio.h>

extern struct rtpkt {
  int sourceid;       /* id of sending router sending this pkt */
  int destid;         /* id of router to which pkt being sent 
                         (must be an immediate neighbor) */
  int mincost[4];    /* min cost to node 0 ... 3 */
  };


extern int TRACE;
extern int YES;
extern int NO;

int connectcosts1[4] = { 1,  0,  1, 999 };

struct distance_table 
{
  int costs[4][4];
} dt1;


/* students to write the following two routines, and maybe some others */


rtinit1() 
{

}


rtupdate1(rcvdpkt)
  struct rtpkt *rcvdpkt;
  
{

}


printdt1(dtptr)
  struct distance_table *dtptr;
  
{
  printf("             via   \n");
  printf("   D1 |    0     2 \n");
  printf("  ----|-----------\n");
  printf("     0|  %3d   %3d\n",dtptr->costs[0][0], dtptr->costs[0][2]);
  printf("dest 2|  %3d   %3d\n",dtptr->costs[2][0], dtptr->costs[2][2]);
  printf("     3|  %3d   %3d\n",dtptr->costs[3][0], dtptr->costs[3][2]);

}



linkhandler1(linkid, newcost)   
int linkid, newcost;   
/* called when cost from 1 to linkid changes from current value to newcost*/
/* You can leave this routine empty if you're an undergrad. If you want */
/* to use this routine, you'll need to change the value of the LINKCHANGE */
/* constant definition in prog3.c from 0 to 1 */
	
{
}