/*********************************************************************
                                                                  v.1
    ping.cz
      ping function set for determining lag time between the
      talker and a player
      

    Requirments:
      ewtoo derivitive talker

    Notes:
      The proc used to get lag time is a bit odd...
      its all clean, but instead of arseing about with 
      timing marks and such... it uses a more simple
      method of requesting the client to do something
      that isnt do'able, then waiting for the client
      to respond.  im sure there is a more 'correct'
      method, but this works just fine


    Bug Reports:
      send to phypor@benland.muc.edu

    Licences:
      freely distributable and modifiable,
      as long as credit given in appropritate
      places for any distrubitions (be it
      this alone or within another package)

    Warranty:
      non, the author <phypor> is in no way responsible
      for use, misuse, abuse, or any other actions
      misactions, reactions of this code,
      its provided as is.

    Author:
      phypor <phypor@benland.muc.edu>

        "if it breaks you get to keep both pieces"
                                   ~old linux proverb


*********************************************************************/



player.h
: if you get any errors about struct timeval 
: add this line to the top of the file ...

#include <sys/time.h>



: add to the p_struct the following member ...

   struct timeval     ping_timer;









socket.c 
: (top of the file with other interns)
void            ping_respond ( player * );




: telnet_options()


   if (read(p->fd, &c, 1) != 1)
      return;

   switch (c)
   {
    /** add the following lines **/
      case WONT:
    if (read(p->fd, &c, 1) != 1)
       return;
    switch (c) /* switch for possible future cases */
    {
       case TELOPT_STATUS:
          ping_respond (p);
          break;
    }
    break;
    /*****************************/






: (bottom of the file add the following)

void ping ( player * p, char * str )
{
   char         *oldstack = stack;

   memset (stack, 0, 10);
   *stack++ = (char) IAC;
   *stack++ = (char) DO;
   *stack++ = (char) TELOPT_STATUS;
   *stack++ = (char) NULL;

   write (p->fd, oldstack, strlen (oldstack));
   stack = oldstack;

   gettimeofday (&(p->ping_timer), (struct timezone *) NULL);

}

void ping_respond ( player * p )
{
   struct timeval  endtv;
   long            pt;


   memset (&endtv, 0, sizeof (struct timeval));
   gettimeofday (&endtv, (struct timezone *) NULL);

   /* a few extra cycles this way... but its unreliable
      using straight values
    */
   pt = ((endtv.tv_sec - p->ping_timer.tv_sec) * 1000000) +
        ((endtv.tv_usec - p->ping_timer.tv_usec));


   ez_tell_player (p, " You've got about %ld.%.2ld seconds of lagtime ...\n",
                   pt / 1000000, (pt / 10000) % 1000000);

}





clist.h
: add a command to call the function ping