Why not just change the regexp to
$rrstring =~ s/^((?:[^\n;]+|"(?:[^\n"\\]|\\[^\n])*")*);[^\n]*$/$1/mg;
What you presented only helps TXT records (even though it's not the only one that can have strings), and doesn't allow embeded quotes ("dd\"dd") even though the spec does.

In reply to Re: Net::DNS::RR patch by ikegami
in thread Net::DNS::RR patch by slife

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