#!/usr/bin/perl
# $RedRiver: update_trango.pl,v 1.8 2005/11/17 20:20:59 andrew Exp $
########################################################################
# update_trango.pl *** Updates trango foxes with a new firmware
# 
# 2005.11.15 #*#*# andrew fresh <andrew@mad-techies.org>
########################################################################
use strict;
use warnings;

use Net::TFTP;

my $config_file = shift || 'update_trango.conf';
my $max_tries = 3;



my $l = Mylogger->new( { log_prefix => 'UT' } );


$l->sp("Reading config file '$config_file'");
my $conf = read_conf($config_file);

$l->sp("  Hardware Type: $conf->{'type'}");
$l->sp("  File Name:     $conf->{'file_name'}");
$l->sp("  File Size:     $conf->{'file_size'}");
$l->sp("  File Checksum: $conf->{'file_cksum'}");
$l->sp("  FW Version:    $conf->{'ver'}");
$l->sp("  FW Checksum:   $conf->{'cksum'}");
$l->sp("");






foreach my $fox (@{ $conf->{'ips'} }) {
  $l->sp("Updating: $fox");

  ## Connect and login.
  my $t = new Trango::Telnet ({
    Host    => $fox,
    Timeout => 5,
  });

  $l->p("Connecting to $fox");
  my ($type, $version) = $t->connect();

  unless (defined $type && defined $version) {
    $l->sp("Error connecting!");
    next;
  }

  if ($type ne $conf->{'type'}) {
    $l->sp("Wrong type of unit ('$type' should be '$conf->{'type'}')");
    $t->close;
    next;
  }

  if ($version eq $conf->{'ver'}) {
    $l->sp("Already up to date with firmware version '$version'");
    $t->close;
    next;
  }

  $l->p("Logging in");
  $t->login($conf->{'password'}) || die "Couldn't login: $!";

  $l->p("Sending commands");
  ## Send commands
  if ( upload($t, $conf->{'file_name'}) ) {
    $l->p("Rebooting");
    $t->reboot;
  } else {
    $l->p("Exiting");
    $t->exit;
  }
  $t->close;
  $l->sp("");
}

sub upload
{
  my $t    = shift;
  my $file = shift;

  $l->p("Getting current version");
  my $ver = $t->ver;

  if (
    $ver->{'Firmware Version'}  eq $conf->{'ver'} && 
    $ver->{'Firmware Checksum'} eq $conf->{'cksum'}
  ) {
    $l->sp("Already updated!");
    return 1;
  }

  my $try = 0;
  while (1) {
    if ($try >= $max_tries) {
      $l->sp("Couldn't update in $max_tries tries!");
      return undef;
    }
    $try++;

    #sysinfo($self->{'_host'});
    
    $l->p("Enabling TFTPd");
    $t->enable_tftpd || die "Couldn't enable tftpd";

    $l->p("Uploading file ($file)");
    # use tftp to push the file up
    my $tftp = Net::TFTP->new($t->Host, Mode => 'octet');

    $tftp->put($file, $file) 
      or die "Error uploading: " . $tftp->error;

    # waitfor some sort of output
    # make sure it says 'Success.' otherwise error
    #print "LAST: " . $self->lastline;
    #my @lines = $self->getlines;
    #print Dump \@lines;
    
    $l->p("Checking upload ($conf->{'file_cksum'})");
    my $results = $t->tftpd;
    # check the 'File Length' against ???
    if ( $results->{'File Checksum'} ne $conf->{'file_cksum'}) {
      $l->sp("File checksum does not match config file!");
      next;
    } 
    $l->p("File checksum ($results->{'File Checksum'}) " . 
          "matches ($conf->{'file_cksum'})");

    if ($results->{'File Length'}   !~ /^$conf->{'file_size'} bytes/) {
      $l->sp("File length does not match config file!");
      next;
    }
    $l->p("File length ($results->{'File Length'}) " . 
          "matches ($conf->{'file_size'})");

    if ( uc($results->{'File Name'}) ne uc($conf->{'file_name'}) ) {
      $l->sp("File name does not match config file!");
      next;
    }
    $l->p("File name ($results->{'File Name'}) " . 
          "matches ($conf->{'file_name'})");

    $l->p("Updating flash (new checksum '$conf->{'cksum'}')");
    unless ($results = $t->updateflash(
      $ver->{'Firmware Checksum'}, $conf->{'cksum'}
    ) ) {
      $l->sp("Couldn't update flash: $!");
      next;
    }

    unless (
      defined $results->{'Checksum'} && 
      $results->{'Checksum'} eq $conf->{'cksum'}
    ) {
      $l->sp("Saved checksum does not match config file!");
      next;
    }
    $l->p("Uploaded checksum ($results->{'Checksum'}) " . 
          "matches ($conf->{'cksum'})");
    
    $l->sp("Successfully updated!");
    return 1;
  }
}

sub read_conf
{
  my $file = shift;
  my %conf;
  my $in_ip_list = 0;
  open my $fh, $file or die "Couldn't open file $file: $!";
  while (<$fh>) {
    chomp;
    next if /^#/;
    next if /^$/;
    if ($in_ip_list) {
      if (/^(\d{1,3}\.\d{1,3}\.\d{1,3}\.)(\d{1,3})-(\d{1,3})/) {
        push @{ $conf{'ips'} }, $1 . $_ for ($2..$3);
      } else {
        push @{ $conf{'ips'} }, $_;
      }
    } else {
      my ($key, $val) = split /\s+/, $_, 2;

      if (lc($key) eq 'ips') {
        $in_ip_list = 1;
        next;
      }

      $conf{ lc($key) } = $val;
    }
  }
  close $fh;

  #print Dump \%conf;
  foreach (
    'password', 
    'file_name', 'file_size', 'file_cksum', 
    'ver', 'cksum', 'ips',
  ) {
    die "No $_ specified in config file!"
      if (not exists $conf{$_});
  }

  #print Dump \%conf;
  #exit;
  return \%conf;
}

package Trango::Telnet;
use base 'Net::Telnet';

my %PRIVATE = (
  connected => 0,
  logged_in => 0,
);

sub new {
  my $class = shift;
  my $args = shift || {};

  $args->{'Timeout'} ||= 5;
  $args->{'Prompt'}  ||= '/#> *$/';

  foreach my $key (keys %{ $args }) {
    $PRIVATE{$key} = $args->{$key};
  }

  my $self = $class->SUPER::new(%{ $args });
  bless $self;

  #bless $self, $package;
  return $self;
}

sub connect
{
  my $self = shift;

  unless ( $self->open( 
      Host => $PRIVATE{'Host'},
      Errmode => 'return',
  ) ) {
    $! = "Couldn't connect to $self->{'Host'}.  Connection timed out.";
    return undef, undef;
  }
  #$self->dump_log('dump.log');

  ## Login to remote host.
  unless ($self->waitfor(
    -match => '/password: ?$/i',
    -errmode => "return",
  ) ) {
    $! = "problem connecting to host ($self->{'Host'}): " . $self->lastline;
    return undef;
  }

  $self->login_banner($self->lastline);

  $PRIVATE{'connected'} = 1;

  return ($self->host_type, $self->firmware_version);
}

sub login
{
  my $self = shift;

  my $password = shift;

  $self->print($password);
  unless ($self->waitfor(
    -match => $self->prompt,
    -errmode => "return",
  ) ) {
    $! = "login ($self->{'Host'}) failed: " . $self->lastline;
    return undef;
  }

  $PRIVATE{'logged_in'} = 1;

  return 1;
}

sub login_banner
{
  my $self = shift;

  my $banner = shift || $PRIVATE{'login_banner'};

  my ($type, $ver) = $banner =~ 
    /Welcome to Trango Broadband Wireless (\w+)-(.+)$/i;

  $self->host_type($type);
  $self->firmware_version($ver); 

  return $banner;
}

sub host_type 
{
  my $self = shift;

  my $type = shift || $PRIVATE{'host_type'};
  $PRIVATE{'host_type'} = $type;

  return $type;
}

sub firmware_version
{
  my $self = shift;

  my $ver = shift || $PRIVATE{'firmware_version'};
  $PRIVATE{'firmware_version'} = $ver;
  
  return $ver
}

sub Host
{
  my $self = shift;
  
  my $host = shift || $PRIVATE{'Host'};
  $PRIVATE{'HOST'} = $host;

  return $host;
}


sub reboot
{
  my $self = shift;

  $self->print("reboot\n");
  $self->getline;

  return 1;
}

sub exit
{
  my $self = shift;

  $self->print("exit\n");
  $self->getline;

  return 1;
}

sub ver
{
  my $self = shift;

  return $self->cmd('ver');
}

sub tftpd
{
  my $self = shift;

  return $self->cmd('tftpd', 'Success.');
}

sub sysinfo
{
  my $self = shift;

  return $self->cmd('sysinfo', 'Success.');
}

sub enable_tftpd
{
  my $self = shift;

  my $vals = $self->cmd('tftpd on', 'Success.');

  if ($vals->{'Tftpd'} eq 'listen') {
    return $vals;
  } else {
    return undef;
  }
}

sub updateflash
{
  my $self = shift;

  my $old = shift;
  my $new = shift;

  return undef unless $new;

  return $self->cmd("updateflash mainimage $old $new", 'Success.', 90);
}

sub cmd
{
  my $self = shift;

  my $string = shift;
  my $expect_last = shift;
  my $timeout = shift || $PRIVATE{'Timeout'};

  unless (defined $string) {
    $! = "No command passed";
    return undef;
  }

  unless ($PRIVATE{'connected'}) {
    $! = "Not connected";
    return undef;
  }

  unless ($PRIVATE{'logged_in'}) {
    $! = "Not logged in";
    return undef;
  }

  my @lines = $self->SUPER::cmd(String => $string, Timeout => $timeout);

  my $vals = _decode_lines(@lines);

  unless ($expect_last) {
    return $vals;
  }

  my $last = $self->lastline;

  if ($last =~ /$expect_last$/) {
    return $vals;
  } else {
    warn "Error with command ($string): $last";
    return undef;
  }
}

sub _decode_lines
{
  my @lines = @_;

  my %conf;

  my $key = '';
  my $val = '';
  my $in_key = 0;
  my $in_val = 0;

  foreach my $line (@lines) {
    my @chars = split //, $line;

    my $last_key = '';
    foreach my $c (@chars) {

      if ($c eq '[' || $c eq "\r" || $c eq "\n") {
        if ($c eq '[') {
          $in_key = 1;
          $in_val = 0;
        } else {
          $in_key = 0;
          $in_val = 0;
        }

        if ($key) {
          $key =~ s/^\s+//;
          $key =~ s/\s+$//;

          $val =~ s/^\s+//;
          $val =~ s/\s+$//;

          if ($key eq 'Checksum' && $last_key) {
            # Special case for these bastids.
            my $new = $last_key;
            $new =~ s/\s+\S+$//;
            $key = $new . " " . $key;
          }

          $last_key = $key;
          $conf{$key} = $val;
          $key = '';
          $val = '';
        }

      } elsif ($c eq ']') {
        $in_val = 1;
        $in_key = 0;
        $c = shift @chars;

      } elsif ($in_key) {
        $key .= $c;

      } elsif ($in_val) {
        $val .= $c;
      }
    }
  }
  #print Dump \%conf;

  if (%conf) {
    return \%conf;
  } else {
    return \@lines;
  }
}



package Mylogger;

use Fcntl ':flock'; # import LOCK_* constants
#use YAML;
use constant LOG_PRINT => 128;
use constant LOG_SAVE  =>  64;

DESTROY {
  my $self = shift;
  if ($self->{'MYLOG'}) {
    $self->p("Closing log ($self->{'log_path'}/$self->{'log_file'})");
    close $self->{'MYLOG'};
  }
}

sub new {
  my $package = shift;
  my $self = shift || {};

  $self->{'base_path'}  ||= '.';
  $self->{'log_path'}   ||= $self->{'base_path'};
  $self->{'log_prefix'} ||= 'LOG';
  $self->{'log_file'}   ||= GetLogName(
    $self->{'log_prefix'}, 
    $self->{'log_path'}
  );
  bless $self, $package;
}

sub s
{
  my $self = shift;
  my $m = shift;
  return $self->mylog($m, LOG_SAVE);
}

sub p
{
  my $self = shift;
  my $m = shift;
  return $self->mylog($m, LOG_PRINT);
}

sub sp
{
  my $self = shift;
  my $m = shift;
  return $self->mylog($m, LOG_SAVE | LOG_PRINT);
}

sub mylog
{
  my $self = shift;

  my $thing = shift;
  chomp $thing;

  my $which = shift;

  my $MYLOG;
  if ($which & LOG_PRINT) {
    print $thing, "\n";
  }

  if ($which & LOG_SAVE) {
    if ($self->{'MYLOG'}) {
      $MYLOG = $self->{'MYLOG'};
    } else {
      unless ($MYLOG) {
		open ($MYLOG, '>>', $self->{'log_path'} . '/' . $self->{'log_file'}) 
          or die "Couldn't open logfile!\n";
        my $ofh = select $MYLOG;
        $|=1;
        select $ofh;
        $self->{'MYLOG'} = $MYLOG;

        $self->p("Opened log ($self->{'log_path'}/$self->{'log_file'})");
      }
    }
    flock($MYLOG, LOCK_EX);
    print $MYLOG (scalar gmtime), "\t", $thing, "\n" 
      or die "Couldn't print to MYLOG: $!";
    flock($MYLOG, LOCK_UN);
  }
}

sub GetLogName
{
  my $prefix  = shift || die "Invalid prefix passed for log";

  my $logdate = GetLogDate();
  my $logver  = 0;
  my $logname;

  do {
    $logname = $prefix . $logdate . sprintf("%02d", $logver) . '.log';
    $logver++;
  } until (not -e $logname);

  return $logname;
}

sub GetLogDate
{
  my ($sec,$min,$hour,$mday,$mon,$year,,,) = localtime();

  $mon++;
  $year += 1900;

  if ($min  < 10) { $min  = "0$min"  }
  if ($sec  < 10) { $sec  = "0$sec"  }
  if ($hour < 10) { $hour = "0$hour" }
  if ($mday < 10) { $mday = "0$mday" }
  if ($mon  < 10) { $mon  = "0$mon"  }

  my $time = $year . $mon . $mday;

  return $time;
}