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Make locally generated truncated answers consistent.

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process_reply() is no longer doing this.
This commit is contained in:
Simon Kelley
2024-11-24 08:25:57 +00:00
parent d2790914df
commit 163c05c61d
3 changed files with 21 additions and 4 deletions
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5
src/auth.c
View File

@@ -868,7 +868,12 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
/* truncation */
if (trunc)
{
header->hb3 |= HB3_TC;
if (!(ansp = skip_questions(header, qlen)))
return 0; /* bad packet */
anscount = authcount = 0;
}
if ((auth || local_query) && nxdomain)
SET_RCODE(header, NXDOMAIN);

6
src/domain-match.c
View File

@@ -444,7 +444,13 @@ size_t make_local_answer(int flags, int gotname, size_t size, struct dns_header
}
if (trunc)
{
header->hb3 |= HB3_TC;
if (!(p = skip_questions(header, size)))
return 0; /* bad packet */
anscount = 0;
}
header->ancount = htons(anscount);
return p - (unsigned char *)header;

6
src/rfc1035.c
View File

@@ -2327,7 +2327,12 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
/* truncation */
if (trunc)
{
header->hb3 |= HB3_TC;
if (!(ansp = skip_questions(header, qlen)))
return 0; /* bad packet */
anscount = nscount = addncount = 0;
}
if (nxdomain)
SET_RCODE(header, NXDOMAIN);
@@ -2335,6 +2340,7 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
SET_RCODE(header, NOTIMP);
else
SET_RCODE(header, NOERROR); /* no error */
header->ancount = htons(anscount);
header->nscount = htons(nscount);
header->arcount = htons(addncount);