Pull an IP address from a string of text.

sub extract_ip { my $txt = shift(); # 4 octets surrounded by some word boundary if ($txt =~ /\b((\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3}))\b/) { if ($2 > 255 || $3 > 255 || $4 > 255 || $5 > 255) { return ''; } return $1; } return ''; }