#!/usr/bin/perl
#
# Copyright (c) 2002 TAKANO Yuji <takachan@running-dog.net>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# bgprouteget.pl - Show IPv6 BGP
#
######################################################################
# モジュール呼び出し
######################################################################

use Net::Telnet ();

######################################################################
# Zebra コマンドプロンプト
######################################################################

my $Prompt_passwd = 'Password: ';

######################################################################
# 初期変数設定
######################################################################

#ホスト名、port、パスワードの設定
my $Host_Name = 'cisco-router';
my $Port_No = '2605';
my $Passwd = '3750';

# zebra に送るコマンドイメージ
#my $Zebra_Command = 'show ip bgp';
my $Zebra_Command = 'show ipv6 bgp';

#出力形式を編集するかしないかの設定
#[-v] オプションで綺麗に出力してくれる(冗長出力オプション)
my $List_mode = '';

######################################################################
#  パラメータの取得(パラメータが無ければ初期変数設定を使用)
######################################################################

my $In = shift;
if ($In eq '-h' || $In eq '--help') {
    print "usage: $0 [-v] [hostname:port] [password]\n\n";
    exit 1;
}

if ($In eq '-v') {
    $List_mode = 'EDIT';
    $In = shift;
}
($Host_Name,$Port_No) = split(':',$In) if ($In);

$In = shift;
$Passwd = $In if ($In);

######################################################################
# コマンドの実行
######################################################################

# ログファイルの設定
# ログが欲しい時には new Net::Telnet のコメントを外すと取れるようになる
my $Log_input  = '/tmp/input';
my $Log_output = '/tmp/output';
my $Log_dump   = '/tmp/dump';

my $TelSock = new Net::Telnet(
		Host       => $Host_Name,
		Port       => $Port_No,
#		Input_log  => $Log_input,
#		Output_log => $Log_output,
#		Dump_Log   => $Log_dump,
		Errmode    => "return"
);

$TelSock->waitfor(String => $Prompt_passwd);
#$TelSock->waitfor($Prompt_passwd);
$TelSock->print("$Passwd");

# -- More -- の抑制
$TelSock->cmd("terminal length 0");

print "Network\t\t\tWeight Path\n" if ($List_mode eq 'EDIT');

foreach $Line ($TelSock->cmd("$Zebra_Command")) {
    if ($List_mode eq 'EDIT') {
        &Cooked($Line);
    } else {
        print $Line;
    }
}
$TelSock->close;

print "\n\n";
exit;

######################################################################
#  出力形式を編集するロジック(あんまり綺麗では無い;-)
######################################################################
sub Cooked {
    my $Line = shift;

    my $Put_Line = "";

    my ($Head,$Net,$t1,$t2,$t3,@tmp) = split(' ',$Line);
    if ($Head =~ /\*>/) {
	if ($tmp[0]) {
	    $Put_Line = "$Net\t\t$t3 @tmp\n";
        } else {
	    $Put_Line = "$Net";
	}
    } elsif ($Head =~ /fe80::249d:4c/) {
	$Put_Line .= "\t$t1 $t2 $t3 @tmp\n";
    } elsif ($Head =~ /::/) {
	$Put_Line .= "\t$t1 $t2 $t3 @tmp\n";
    } else {
	return;
    }
    print "$Put_Line";
    return;
}