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Don't forward *.bind/*.server queries upstream

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Chaos .bind and .server (RFC4892) zones are local, therefore
don't forward queries upstream to avoid mixing with supported
locally and false replies with NO_ID enabled.
This commit is contained in:
Vladislav Grishenko
2018-10-18 04:55:21 +05:00
committed by Simon Kelley
parent ee8750451b
commit cf5984367b
1 changed files with 14 additions and 1 deletions
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15
src/rfc1035.c
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@@ -1276,7 +1276,7 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
int q, ans, anscount = 0, addncount = 0; int q, ans, anscount = 0, addncount = 0;
int dryrun = 0; int dryrun = 0;
struct crec *crecp; struct crec *crecp;
int nxdomain = 0, auth = 1, trunc = 0, sec_data = 1; int nxdomain = 0, notimp = 0, auth = 1, trunc = 0, sec_data = 1;
struct mx_srv_record *rec; struct mx_srv_record *rec;
size_t len; size_t len;
@@ -1355,6 +1355,17 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
} }
} }
if (qclass == C_CHAOS)
{
/* don't forward *.bind and *.server chaos queries */
if (hostname_issubdomain("bind", name) || hostname_issubdomain("server", name))
{
if (!ans)
notimp = 1, auth = 0;
ans = 1;
}
}
if (qclass == C_IN) if (qclass == C_IN)
{ {
struct txt_record *t; struct txt_record *t;
@@ -1903,6 +1914,8 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
if (nxdomain) if (nxdomain)
SET_RCODE(header, NXDOMAIN); SET_RCODE(header, NXDOMAIN);
else if (notimp)
SET_RCODE(header, NOTIMP);
else else
SET_RCODE(header, NOERROR); /* no error */ SET_RCODE(header, NOERROR); /* no error */
header->ancount = htons(anscount); header->ancount = htons(anscount);