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net.c

/* FILE:    net.c
 * PROGRAM: RAT
 * AUTHOR:  Colin Perkins / Orion Hodson / Dimitris Miras
 *
 * Copyright (c) 1995-2001 University College London
 * All rights reserved.
 */
 
#ifndef HIDE_SOURCE_STRINGS
static const char cvsid[] = 
      "$Id: net.c,v 1.73 2001/01/08 20:30:04 ucaccsp Exp $";
#endif /* HIDE_SOURCE_STRINGS */

#include "config_unix.h"
#include "config_win32.h"
#include "session.h"
#include "mbus.h"
#include "net.h"

#define SECS_BETWEEN_1900_1970 2208988800u

void network_process_mbus(session_t *sp)
{
      /* Process outstanding Mbus messages. */
      int         rc, c;
      struct timeval    timeout;

      session_validate(sp);
      c = 0;
      do {
            timeout.tv_sec  = 0;
            timeout.tv_usec = 0;
            rc  = mbus_recv(sp->mbus_engine, (void *) sp, &timeout); 
            mbus_send(sp->mbus_engine); 
            mbus_heartbeat(sp->mbus_engine, 1);
            mbus_retransmit(sp->mbus_engine);
            if (rc) {
                  c = 0;
            } else {
                  c++;
            }
      } while (c < 3);
}

uint32_t 
ntp_time32(void)
{
        struct timeval  tv;
        uint32_t sec, usec, frac;

        gettimeofday(&tv, 0);
        sec  = tv.tv_sec + SECS_BETWEEN_1900_1970;
        usec = tv.tv_usec;
        frac = (usec << 12) + (usec << 8) - ((usec * 3650) >> 6);
        return (sec & 0xffff) << 16 | frac >> 16;
}

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