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Regression introduced by commit 4b54e14b7c,
where the number of returned records is not set by talloc_array_length
when the record is not found.
Found by DELL EMC at SDC SMB3 plugfest trying to perform a secure DNS
update.
Signed-off-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Samuel Cabrero <scabrero@samba.org>
Autobuild-Date(master): Fri Nov 8 12:31:30 UTC 2019 on sn-devel-184
If done with popt context it should be free'd.
Signed-off-by: Swen Schillig <swen@linux.ibm.com>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Ralph Böhme <slow@samba.org>
Following the python/C convention for checking vs non-checking
convertors.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
In future we should use ipv4address, but that would result in a much
larger change.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13969
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
To avoid warning above produced by using
-Wcast-function-type we;
+ ensure PyCFunctions of type METH_NOARGS defined dummy arg
+ ensure PyCFunctions of type METH_KEYWORDS use PY_DISCARD_FUNC_SIG
macro
+ ensure PyCFunctions of type METH_KEYWORDS really actually use the
problematic kargs param, if not remove it
Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
We sort NULL values to the end of the list. What happens to the after
that is another question.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
Add duration debug logging to the samba bind9 dlz driver and the
dnsserver_common routines. This should aid future diagnosis of
performance issues, and could be used to monitor DNS performance.
The logs are currently Human readable text only, i.e. no JSON formatted
output.
Log lines are of the form:
<function>: DNS timing: result: [<result>] \
duration: (<duration>) zone: [<zone>] name: [<name>] \
data: [<data>]
e.g.
dns_common_wildcard_lookup: DNS timing: result: [WERR_OK] \
duration: (111) zone: [] \
name: [DC=_ldap._tcp.Default-First-Site-Name._sites.ForestDnsZones,\
DC=chgdcpassword.samba.example.com,CN=MicrosoftDNS,DC=DomainDnsZones,\
DC=chgdcpassword,DC=samba,DC=example,DC=com] data: []
Enabled by setting log level to "dns:10"
durations are in microseconds.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Tue May 7 05:03:26 UTC 2019 on sn-devel-184
In order to detect an value overflow error during
the string to integer conversion with strtoul/strtoull,
the errno variable must be set to zero before the execution and
checked after the conversion is performed. This is achieved by
using the wrapper function strtoul_err and strtoull_err.
Signed-off-by: Swen Schillig <swen@linux.ibm.com>
Reviewed-by: Ralph Böhme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Py_BuildValue when processing format 'O' will
'Pass a Python object untouched (except for its reference count,
which is incremented by one'
Basically this means if you are using a new reference to a PyObject
to pass to BuildValue (to be used with the 'O' format) the reference
*isn't* stolen so you really do need to DECREF it in order to ensure
it gets cleaned up.
Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
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>
The loop prevention should only be done for CNAME records!
Otherwise we truncate the answer records for A, AAAA or
SRV queries, which is a bad idea if you have more than 20 DCs.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13600
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Tue Dec 4 08:52:29 CET 2018 on sn-devel-144
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>
Count number of answers generated by internal DNS query routine and stop at
20 to match Microsoft's loop prevention mechanism.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13600
Signed-off-by: Aaron Haslett <aaronhaslett@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
../source4/dns_server/dlz_bind9.c:1132:4: error: 'dn' may be used uninitialized in this function [-Werror=maybe-uninitialized]
state->log(ISC_LOG_INFO, "failed to find dnsRecord for %s",
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ldb_dn_get_linearized(dn));
~~~~~~~~~~~~~~~~~~~~~~~~~~
Found by Undefined Sanitizer.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
Add a post fork hook to the service API this will be called:
- standard process model
immediately after the task_init.
- single process model
immediately after the task_init
- prefork process model, inhibit_pre_fork = true
immediately after the task_init
- prefork process model, inhibit_pre_fork = false
after each service worker has forked. It is not run on the service
master process.
The post fork hook is not called in the standard model if a new process
is forked on a new connection. It is instead called immediately after
the task_init.
The task_init hook has been changed to return an error code. This ensures
the post_fork code is only run if the task_init code completed successfully.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
dlz_bind9 has to count the number of times the plugin is 'created' by bind's
plugin manager so it doesn't repeat setup. Logging doesn't reflect this
reference counting logic properly and so messages like "samba_dlz: shutdown"
can, confusingly, come up when the database connection has not actually been
severed. This patch adds the necessary logging.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13655
Signed-off-by: Aaron Haslett <aaronhaslett@catalyst.net.nz>
Reviewed-by: Jeremy Allison <jra@samba.org>
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>
Replace uses of the string "sessionInfo" with the constant
DSDB_SESSION_INFO, and "networkSessionInfo" with the constant
DSDB_NETWORK_SESSION_INFO.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Fri Jun 1 14:05:56 CEST 2018 on sn-devel-144
We've done an early return if (!found_tsig) a few lines before.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
This would have to be retrieved from the interface type we have I guess.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Jan 4 05:08:02 CET 2018 on sn-devel-144
This was part of the previous bugfix for 9632, which has been replaced
by TCP fallback code. We can dig this up from git if needed.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This skips adding the DNS option for a larger UDP packet size than
512. This is a different fix for bug 9632.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@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>
Fix picky developer clang warning about assignment
of an enum value to a variable of a different enum type.
Signed-off-by: Uri Simchoni <uri@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
