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Make --filter-rr=ANY filter the answer to ANY queries.

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Thanks to Dominik Derigs for an earlier patch which inspired this.
This commit is contained in:
Simon Kelley
2024-02-12 16:14:06 +00:00
parent febeea9d01
commit 3de7289bd6
4 changed files with 33 additions and 12 deletions
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8
src/rrfilter.c
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@@ -213,6 +213,14 @@ size_t rrfilter(struct dns_header *header, size_t *plen, int mode)
if (i < ntohs(header->ancount) && type == qtype && class == qclass)
continue;
}
else if (qtype == T_ANY && rr_on_list(daemon->filter_rr, T_ANY))
{
/* Filter replies to ANY queries in the spirit of
RFC RFC 8482 para 4.3 */
if (class != C_IN ||
type == T_A || type == T_AAAA || type == T_MX || type == T_CNAME)
continue;
}
else
{
/* Only looking at answer section now. */