text: /*  Copyright (C) 1996 N.M. Maclaren
      Copyright (C) 1996 The University of Cambridge
  
  This includes all of the 'safe' headers and definitions used across modules.
  No changes should be needed for any system that is even remotely like Unix. */
  
  
  
  #include <ctype.h>
  #include <errno.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <time.h>
  
  
  
  #define VERSION         "1.6a"         /* Just the version string */
  #define MAX_SOCKETS        10          /* Maximum number of addresses */
  
  #ifndef LOCKNAME
      #define LOCKNAME "/etc/msntp.pid"  /* Stores the pid */
  #endif
  #ifndef SAVENAME
      #define SAVENAME "/etc/msntp.state" /* Stores the recovery state */
  #endif
  
  #ifndef DISPLAY_MSG
      #define fprintf(fptr, fmt, args...) do {;} while(0)
  #endif
  
  /* Defined in main.c */
  
  #define op_client           1          /* Behave as a challenge client */
  #define op_server           2          /* Behave as a response server */
  #define op_listen           3          /* Behave as a listening client */
  #define op_broadcast        4          /* Behave as a broadcast server */
  
  extern const char *argv0;
  
  extern int verbose, operation;
  
  extern const char *lockname;
  
  #ifdef DISPLAY_MSG
  extern void fatal (int syserr, const char *message, const char *insert);
  #else
  #define fatal(syserr, msg, insert)  \
      do { \
          if (syserr) perror(argv0); \
          exit(EXIT_FAILURE); \
         }while(0)
  #endif
  
  
  /* Defined in unix.c */
  
  extern void do_nothing (int seconds);
  
  extern int ftty (FILE *file);
  
  extern void set_lock (int lock);
  
  extern void log_message (const char *message);
  
  
  
  /* Defined in internet.c */
  
  /* extern void find_address (struct in_addr *address, int *port, char *hostname,
      int timespan); */
  
  
  
  /* Defined in socket.c */
  
  extern void open_sockets (int which, char *hostnames, int timespan);
  
  extern void write_socket (int which, void *packet, int length);
  
  extern int read_socket (int which, void *packet, int length, int waiting);
  
  extern int flush_socket (int which);
  
  extern void close_socket (int which);
  
  
  
  /* Defined in timing.c */
  
  extern double current_time (double offset);
  
  extern time_t convert_time (double value, int *millisecs);
  
  extern void adjust_time (double difference, int immediate, double ignore);
  