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Add logging for DNS error returns from upstream and local configuration.

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This commit is contained in:
Simon Kelley
2018-05-04 21:52:22 +01:00
parent 0669ee7a69
commit 07ed585c38
4 changed files with 52 additions and 12 deletions
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19
src/rfc1035.c
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@@ -926,12 +926,11 @@ unsigned int extract_request(struct dns_header *header, size_t qlen, char *name,
return F_QUERY;
}
size_t setup_reply(struct dns_header *header, size_t qlen,
struct all_addr *addrp, unsigned int flags, unsigned long ttl)
{
unsigned char *p;
if (!(p = skip_questions(header, qlen)))
return 0;
@@ -948,7 +947,12 @@ size_t setup_reply(struct dns_header *header, size_t qlen,
else if (flags == F_NXDOMAIN)
SET_RCODE(header, NXDOMAIN);
else if (flags == F_SERVFAIL)
SET_RCODE(header, SERVFAIL);
{
struct all_addr a;
a.addr.rcode.rcode = SERVFAIL;
log_query(F_CONFIG | F_RCODE, "error", &a, NULL);
SET_RCODE(header, SERVFAIL);
}
else if (flags == F_IPV4)
{ /* we know the address */
SET_RCODE(header, NOERROR);
@@ -966,8 +970,13 @@ size_t setup_reply(struct dns_header *header, size_t qlen,
}
#endif
else /* nowhere to forward to */
SET_RCODE(header, REFUSED);
{
struct all_addr a;
a.addr.rcode.rcode = REFUSED;
log_query(F_CONFIG | F_RCODE, "error", &a, NULL);
SET_RCODE(header, REFUSED);
}
return p - (unsigned char *)header;
}