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| #!/usr/bin/env perl
# 言語: perl
# バージョン: 5.36以上
# 依存: Moo（cpanmでインストール）
use v5.36;
package IntrusionEvent;
use Moo;
has timestamp => (
is => 'ro',
required => 1,
);
has source_ip => (
is => 'ro',
required => 1,
);
has attack_type => (
is => 'ro',
required => 1,
);
package IntrusionObserver;
use Moo::Role;
requires 'update';
package RadarLogObserver;
use Moo;
with 'IntrusionObserver';
sub update ($self, $event) {
say "[ログ] " . $event->timestamp . " / " . $event->source_ip . " / " . $event->attack_type;
}
package ThreatScoreObserver;
use Moo;
with 'IntrusionObserver';
my %threat_scores = (
'SSH Brute Force' => 80,
'Port Scan' => 30,
'SQL Injection Attempt' => 90,
);
has total_score => (
is => 'rw',
default => 0,
);
sub update ($self, $event) {
my $score = $threat_scores{$event->attack_type} // 50;
$self->total_score($self->total_score + $score);
say "[スコア] 累計: " . $self->total_score;
}
# アラート担当（新規追加）
package AlertObserver;
use Moo;
with 'IntrusionObserver';
sub update ($self, $event) {
say "!!! [警報] 侵入検知: " . $event->attack_type . " from " . $event->source_ip . " !!!";
}
package IntrusionHub;
use Moo;
has observers => (
is => 'ro',
default => sub { [] },
);
sub attach ($self, $observer) {
push $self->observers->@*, $observer;
}
sub detach ($self, $observer) {
$self->observers->@* = grep { $_ != $observer } $self->observers->@*;
}
sub notify ($self, $event) {
for my $observer ($self->observers->@*) {
$observer->update($event);
}
}
package main;
my $hub = IntrusionHub->new;
# 常時稼働のObserver
my $log_observer = RadarLogObserver->new;
my $score_observer = ThreatScoreObserver->new;
$hub->attach($log_observer);
$hub->attach($score_observer);
# 深夜帯専用のObserver
my $alert_observer = AlertObserver->new;
# イベントを用意
my @events = (
IntrusionEvent->new(
timestamp => '2026-01-18T14:00:00+09:00',
source_ip => '192.168.1.100',
attack_type => 'Port Scan',
),
IntrusionEvent->new(
timestamp => '2026-01-18T02:30:00+09:00',
source_ip => '10.0.0.55',
attack_type => 'SSH Brute Force',
),
IntrusionEvent->new(
timestamp => '2026-01-18T03:15:00+09:00',
source_ip => '172.16.0.22',
attack_type => 'SQL Injection Attempt',
),
);
say "=== 日中モード ===";
$hub->notify($events[0]);
say "";
say "=== 深夜モード（アラートON）===";
$hub->attach($alert_observer); # 深夜になったのでアラートを有効化
$hub->notify($events[1]);
say "";
say "=== 引き続き深夜モード ===";
$hub->notify($events[2]);
say "";
say "=== 朝になったのでアラートOFF ===";
$hub->detach($alert_observer); # 朝になったのでアラートを無効化
$hub->notify($events[0]); # 再度同じイベントで確認
|
