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Tweak packet-reduction code going from TCP->UDP.

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This commit is contained in:
Simon Kelley
2024-10-13 23:09:48 +01:00
parent 0338aa4586
commit a9d46d42cb
1 changed files with 10 additions and 3 deletions
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11
src/forward.c
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@@ -2143,12 +2143,19 @@ int tcp_from_udp(time_t now, int status, struct dns_header *header, ssize_t *ple
if (n >= daemon->edns_pktsz)
{
new_header->ancount = htons(0);
/* still too bug, strip optional sections and try again. */
new_header->nscount = htons(0);
new_header->arcount = htons(0);
n = resize_packet(header, n, NULL, 0);
n = resize_packet(new_header, n, NULL, 0);
if (n >= daemon->edns_pktsz)
{
/* truncating the packet will break the answers, so remove them too
and mark the reply as truncated. */
new_header->ancount = htons(0);
n = resize_packet(new_header, n, NULL, 0);
new_status = STAT_TRUNCATED;
}
}
/* return the stripped or truncated reply. */
memcpy(header, new_header, n);