check_address.cpp

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/*****************************************************************************\
*                                                                             *
*  Name   : check_address                                                     *
*  Author : Chris Koeritz                                                     *
*                                                                             *
*******************************************************************************
* Copyright (c) 2000-$now By Author.  This program is free software; you can  *
* redistribute it and/or modify it under the terms of the GNU General Public  *
* License as published by the Free Software Foundation; either version 2 of   *
* the License or (at your option) any later version.  This is online at:      *
*     http://www.fsf.org/copyleft/gpl.html                                    *
* Please send any updates to: fred@gruntose.com                               *
\*****************************************************************************/

#include <basis/byte_array.h>
#include <opsystem/byte_filer.h>
#include <loggers/console_logger.h>
#include <opsystem/filename.h>
#include <data_struct/static_memory_gremlin.h>
#include <sockets/address.h>
#include <sockets/tcpip_stack.h>

#include <stdio.h>

HOOPLE_STARTUP_CODE;

console_logger out;
#define LOG(to_print) EMERGENCY_LOG(out, to_print)


bool check_hostname(const istring &host)
{
  tcpip_stack stack;
  istring full_name;
  byte_array addr = stack.full_resolve(host, full_name);
  // if the address has any length, we are successful in finding the name.
  if (!addr.length()) {
    // failed.
    LOG(host + ": host is not listed in DNS or WINS!");
    return false;
  }
  return true;
}

int main(int argc, char *argv[])
{
  if (argc < 2) {
    out.log(filename(argv[0]).rootname() + " usage:\n\
The first parameter must be a host name or IP address that will be\n\
checked for reachability.\n");
    return 1;
  }
  istring parm = argv[1];
  bool happy = false;
  if (internet_address::valid_address(parm)) {
    // this looks like an IP address, so we'll assume they're hip about it.
    return 0;
  } else {
    // more like a hostname here.  see if we can find its address.
    happy = check_hostname(parm);
  }

  if (happy) {
    LOG(istring("found ") + parm + " successfully.");
  }

  // if happy is okay, then we return zero.
  return !happy;
}

#ifdef __BUILD_STATIC_APPLICATION__
  // static dependencies found by buildor_gen_deps.sh:
  #include <basis/array.cpp>
  #include <basis/byte_array.cpp>
  #include <basis/callstack_tracker.cpp>
  #include <basis/chaos.cpp>
  #include <basis/convert_utf.cpp>
  #include <basis/definitions.cpp>
  #include <basis/earth_time.cpp>
  #include <basis/guards.cpp>
  #include <basis/istring.cpp>
  #include <basis/log_base.cpp>
  #include <basis/memory_checker.cpp>
  #include <basis/mutex.cpp>
  #include <basis/object_base.cpp>
  #include <basis/outcome.cpp>
  #include <basis/packable.cpp>
  #include <basis/portable.cpp>
  #include <basis/sequence.cpp>
  #include <basis/set.cpp>
  #include <basis/utility.cpp>
  #include <basis/version_record.cpp>
  #include <data_struct/amorph.cpp>
  #include <data_struct/bit_vector.cpp>
  #include <data_struct/byte_hasher.cpp>
  #include <data_struct/configurator.cpp>
  #include <data_struct/hash_table.cpp>
  #include <data_struct/pointer_hash.cpp>
  #include <data_struct/stack.cpp>
  #include <data_struct/static_memory_gremlin.cpp>
  #include <data_struct/string_hash.cpp>
  #include <data_struct/string_hasher.cpp>
  #include <data_struct/string_table.cpp>
  #include <data_struct/symbol_table.cpp>
  #include <data_struct/table_configurator.cpp>
  #include <loggers/console_logger.cpp>
  #include <loggers/file_logger.cpp>
  #include <loggers/locked_logger.cpp>
  #include <loggers/null_logger.cpp>
  #include <loggers/program_wide_logger.cpp>
  #include <opsystem/byte_filer.cpp>
  #include <opsystem/command_line.cpp>
  #include <opsystem/critical_events.cpp>
  #include <opsystem/directory.cpp>
  #include <opsystem/filename.cpp>
  #include <opsystem/ini_config.cpp>
  #include <opsystem/ini_parser.cpp>
  #include <opsystem/path_configuration.cpp>
  #include <opsystem/rendezvous.cpp>
  #include <sockets/address_base.cpp>
  #include <sockets/address.cpp>
  #include <sockets/imp_sockets.cpp>
  #include <sockets/machine_uid.cpp>
  #include <sockets/tcpip_stack.cpp>
  #include <textual/byte_format.cpp>
  #include <textual/parser_bits.cpp>
  #include <textual/string_manipulation.cpp>
  #include <textual/tokenizer.cpp>
#endif // __BUILD_STATIC_APPLICATION__

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