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Fix bugs in caching CNAMEs with target to SRV records.

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This commit is contained in:
Simon Kelley
2019-10-25 17:23:56 +01:00
parent b59a5c2567
commit 122997da54
1 changed files with 10 additions and 18 deletions
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28
src/rfc1035.c
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@@ -802,8 +802,10 @@ int extract_addresses(struct dns_header *header, size_t qlen, char *name, time_t
if (attl < cttl)
cttl = attl;
namep = p1;
if (!extract_name(header, qlen, &p1, name, 1, 0))
return 0;
goto cname_loop1;
}
else if (!(flags & F_NXDOMAIN))
@@ -1882,26 +1884,16 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
if (!dryrun)
log_query(crecp->flags, name, NULL, NULL);
}
else
else if (!dryrun)
{
unsigned char *p1 = ((unsigned char *)header) + nameoffset;
char *target = blockdata_retrieve(crecp->addr.srv.target, crecp->addr.srv.targetlen, NULL);
log_query(crecp->flags, name, NULL, 0);
if (!dryrun)
{
log_query(crecp->flags, name, NULL, 0);
blockdata_retrieve(crecp->addr.srv.target, crecp->addr.srv.targetlen, name);
if (add_resource_record(header, limit, &trunc, nameoffset, &ansp,
crec_ttl(crecp, now), NULL, T_SRV, C_IN, "sssd",
crecp->addr.srv.priority, crecp->addr.srv.weight, crecp->addr.srv.srvport,
name))
anscount++;
/* restore name we overwrote */
if (!extract_name(header, qlen, &p1, name, 1, 0))
return 0; /* bad packet */
}
if (add_resource_record(header, limit, &trunc, nameoffset, &ansp,
crec_ttl(crecp, now), NULL, T_SRV, C_IN, "sssd",
crecp->addr.srv.priority, crecp->addr.srv.weight, crecp->addr.srv.srvport,
target))
anscount++;
}
} while ((crecp = cache_find_by_name(crecp, name, now, F_SRV)));
}