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SCOPE_ONELEVEL is used on wildcard dns searches, but onelevel searches
currently have a performance problem related to GUID indexing, so this
patch changes the search scope to SCOPE_SUBTREE.
In this case, as the onelevel and subtree sets of records are roughly
the same, and the query is matching against the DN itself, we don't
believe there's any benefit in using SCOPE_ONELEVEL over SCOPE_SUBTREE.
The onelevel performance problem will be fixed separately later, but in
the meantime this solves the DNS performance problem.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13738
Signed-off-by: Aaron Haslett <aaronhaslett@catalyst.net.nz>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
dnsserver_common.c and dnsutils.c both share similar code to process
zone properties. This patch extracts the common code and moves it to
dnsserver_common.c.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13669
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
By using the new ldb_dn_add_child_val() we ensure that the user-controlled values are
not parsed as DN seperators.
Additionally, the casefold DN is obtained before the search to trigger
a full parse of the DN before being handled to the LDB search.
This is not normally required but is done here due to the nature
of the untrusted input.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13466
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
This changes our DNS server to be much more careful when constructing DNS names
into LDB DN values.
This avoids a segfault deep in the LDB code if the ldb_dn_get_casefold() fails there.
A seperate patch will address that part of the issue, and a later patch
will re-work this code to use single API: ldb_dn_add_child_val(). This
is not squahed with this work because this patch does not rely on a new
LDB release, and so may be helpful for a backport.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13466
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
The current position in the dns name was not advanced past the '.'
character
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Fri Jul 20 04:40:31 CEST 2018 on sn-devel-144
Modifies bind9 and internal dns to match windows static records behaviour.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=10812
Signed-off-by: Aaron Haslett <aaronhaslett@catalyst.net.nz>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Code for retrieving aging properties from a zone and using them for timestamp
setting logic during processing of DNS requests.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=10812
Signed-off-by: Aaron Haslett <aaronhaslett@catalyst.net.nz>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This function is duplicated in the BIND9 and RPC DNS servers.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=10812
Signed-off-by: Aaron Haslett <aaronhaslett@catalyst.net.nz>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
The wildcard lookup is SCOPE_ONELEVEL combined with an index on the name
attribute. This is not as efficient as a base DN lookup, so we try for
that first.
A not-found and wildcard response will still fall back to the ONELEVEL
index.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13191
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This query is made for every record returned via BIND9 DLZ.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13191
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
(the RDN, being 'dc' in this use case, does not have an index in
the AD schema).
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13191
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Add support for dns wildcard records. i.e. if the following records
exist
exact.samba.example.com 3600 A 1.1.1.1
*.samba.example.com 3600 A 1.1.1.2
look up on exact.samba.example.com will return 1.1.1.1
look up on *.samba.example.com will return 1.1.1.2
look up on other.samba.example.com will return 1.1.1.2
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12952
Add checks for the maximum permitted length, maximum number of labels
and the maximum label length. These extra checks will be used by the
DNS wild card handling.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12952
The code to clobber the host name appears to have caused DNS requests to use 3x as much resources
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Thu Jun 22 13:06:07 CEST 2017 on sn-devel-144
Otherwise, we always report the first server we created/provisioned the AD domain on
which does not match AD behaviour. AD is multi-master so all RW servers are a master.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This allows lookups to be confined to one partition, which in turn avoids issues
when running this against MS Windows, which does not match Samba behaviour
for dns_common_zones()
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Fills in the missing TODO. Note that this may also prevent deletion of
existing corrupted records, but should be resolvable through RPC, or at
worst LDAP.
Signed-off-by: Bob Campbell <bobcampbell@catalyst.net.nz>
Pair-programmed-with: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This may also prevent deletion of existing corrupted records through
DNS, but should be resolvable through RPC, or at worst LDAP.
Signed-off-by: Bob Campbell <bobcampbell@catalyst.net.nz>
Pair-programmed-with: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
When not looking for tombstones, a record without a dnsRecord value may as
well not be present, so just return WERR_DNS_ERROR_NAME_DOES_NOT_EXIST
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This will allow a python module to be written to modify DNS entries in sam.ldb directly
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Bug: https://bugzilla.samba.org/show_bug.cgi?id=10749
Pair-Programmed-With: Michael Adam <obnox@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Bug: https://bugzilla.samba.org/show_bug.cgi?id=10749
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Bug: https://bugzilla.samba.org/show_bug.cgi?id=10749
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Bug: https://bugzilla.samba.org/show_bug.cgi?id=10749
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This will contain common code for the internal dns server, the dlz_bind9 module
and the rpc dns management server.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=10749
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
