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Commit Graph

77 Commits

Author SHA1 Message Date
Ralph Boehme
4142bde7e5 s4: rename source4/smbd/ to source4/samba/
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Fri Nov 27 10:07:18 UTC 2020 on sn-devel-184
2020-11-27 10:07:18 +00:00
Samuel Cabrero
f9eaf4dc71 dns: Always return SOA record for records we should know
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
2019-11-08 12:31:29 +00:00
Stefan Metzmacher
34f4491d79 CVE-2018-14629 dns: fix CNAME loop prevention using counter regression
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
2018-12-04 08:52:29 +01:00
Aaron Haslett
97b426baba CVE-2018-14629 dns: CNAME loop prevention using counter
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>
2018-11-28 08:22:23 +01:00
Volker Lendecke
c56cd283f5 dns: Check for talloc_memdup failure
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
2018-06-01 14:05:56 +02:00
Volker Lendecke
341b470854 dns: TALLOC_FREE already checks for !=NULL
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
2018-06-01 11:28:22 +02:00
Stefan Metzmacher
a206cf2dc1 s4:dns_server: avoid debug noise on successful updates
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12423

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
2018-01-10 01:01:24 +01:00
Volker Lendecke
cc3f9c26ec dns_server: Remove unused "dns" parameter from ask_forwarder_send
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2018-01-04 00:37:21 +01:00
Volker Lendecke
300821b793 dns_server: Use dns_cli_request instead of direct udp
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>
2018-01-04 00:37:21 +01:00
Uri Simchoni
5fd04020c2 dns server: fix warning about enum mismatch
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>
2017-11-22 10:20:20 +01:00
Gary Lockyer
edcbc99125 dnsserver: Add support for dns wildcards
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
2017-08-15 08:07:10 +02:00
Marc Muehlfeld
4b56f80379 Set log level for "Not authorative for" from 2 to 5
Signed-off-by: Marc Muehlfeld <mmuehlfeld@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

Autobuild-User(master): Marc Muehlfeld <mmuehlfeld@samba.org>
Autobuild-Date(master): Wed Jul 26 21:34:48 CEST 2017 on sn-devel-144
2017-07-26 21:34:48 +02:00
Stefan Metzmacher
186543a727 s4:dns_server: use samba_server_gensec_krb5_start() and gensec_update() in dns_query.c
This avoids using gensec_update_ev() with a nested event loop.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2017-05-21 21:05:12 +02:00
Andrew Bartlett
59ed188ede dns: Provide local and remote socket address to GENSEC
This can be used for logging and for Kerberos channel bindings

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Pair-Programmed-by: Gary Lockyer <gary@catalyst.net.nz>
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
2017-03-29 02:37:27 +02:00
Günther Deschner
c1c079cf3d werror: replace WERR_NOMEM with WERR_NOT_ENOUGH_MEMORY in source4/dns_server/
Guenther

Signed-off-by: Guenther Deschner <gd@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2016-09-28 00:04:19 +02:00
Garming Sam
9394e14626 dns_server: Fix typo in dns_authoritative_for_zone() name.
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2016-06-16 04:40:14 +02:00
Garming Sam
5caebde11d dns: modify dns forwarder param to be multi-valued
This allows a secondary DNS forwarder for a trivial failover. Requests
which fail/timeout at the primary DNS forwarder will be restarted
entirely with the next forwarder in the list.

Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2016-05-03 08:10:09 +02:00
Stefan Metzmacher
ee8d777bbf CVE-2016-0771: s4:dns_server: fix idl for dns_txt_record
From RFC 1035:

    3.3.14. TXT RDATA format

        +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
        /                   TXT-DATA                    /
        +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

    where:

    TXT-DATA        One or more <character-string>s.

    TXT RRs are used to hold descriptive text.  The semantics of the text
    depends on the domain where it is found.

Each record contains an array of strings instead of just one string.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=11128
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11686

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2016-03-10 06:52:24 +01:00
Volker Lendecke
5a72a2ed0d dns_server: Remove unused handle_question
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Kai Blin <kai@samba.org>

Autobuild-User(master): Kai Blin <kai@samba.org>
Autobuild-Date(master): Tue Dec 15 17:50:32 CET 2015 on sn-devel-104
2015-12-15 17:50:32 +01:00
Volker Lendecke
6adec9339d dns_server: Add handle_authoritative_send()
An async version of handle_question

Bug: https://bugzilla.samba.org/show_bug.cgi?id=9409
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Kai Blin <kai@samba.org>
2015-12-15 14:43:09 +01:00
Volker Lendecke
3b7f99e6f4 dns_server: Add add_dns_res_rec()
Same as add_response_rr(), but it copies over a dns_res_rec

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Kai Blin <kai@samba.org>
2015-12-15 14:43:09 +01:00
Volker Lendecke
b6aaf77897 dns_server: Convert "ask_forwarder" params
Usually we have mem_ctx and ev first when doing a _send function

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Kai Blin <kai@samba.org>
2015-12-15 14:43:09 +01:00
Volker Lendecke
4b54e14b7c dns_server: Simplify array length handling
talloc objects carry an implicit length

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Kai Blin <kai@samba.org>
2015-12-15 14:43:09 +01:00
Volker Lendecke
3f2cbb616f dns_server: Simplify talloc handling
By making sure that the answers are always allocated, we don't have
to pass an explicit mem_ctx anymore

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Kai Blin <kai@samba.org>
2015-12-15 14:43:09 +01:00
Volker Lendecke
9de59c7e3f dns_server: Consolidate talloc_realloc
This puts the talloc_realloc into add_response_rr instead of before
create_response_rr. It is a bit less efficient, but as we do not expect
hundreds of answers, I think this code is a bit easier to understand.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Kai Blin <kai@samba.org>
2015-12-15 14:43:09 +01:00
Volker Lendecke
dfceb51da8 libdns: Convert dns_udp_request to 0/errno
Replaces 5 calls to unix_to_werror with just one

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2015-12-08 23:01:27 +01:00
Volker Lendecke
1fcad53d7c dns_server: Fix a small memleak
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>

Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Fri Aug  7 12:57:02 CEST 2015 on sn-devel-104
2015-08-07 12:57:02 +02:00
Volker Lendecke
938636886c dns_server: Don't call tevent_req_finish twice
Both tevent_req_werror and tevent_req_done call tevent_req_finish on a request.
This should not be done. We should only call either of both.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
2015-08-07 09:52:13 +02:00
Kai Blin
42f38fe8d9 dns: always add authority records
Signed-off-by: Kai Blin <kai@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>

Autobuild-User(master): Kai Blin <kai@samba.org>
Autobuild-Date(master): Thu Aug  6 14:06:52 CEST 2015 on sn-devel-104
2015-08-06 14:06:52 +02:00
Kai Blin
d9a3f19749 dns: Add a SOA record to error replies
Signed-off-by: Kai Blin <kai@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
2015-08-06 11:03:14 +02:00
Kai Blin
bda1a7320f dns: Also pass nsrecs to handle_question()
Signed-off-by: Kai Blin <kai@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
2015-08-06 11:03:14 +02:00
Kai Blin
0e11c08d3e dns: Just pass the name to create_response_rr
Signed-off-by: Kai Blin <kai@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
2015-08-06 11:03:13 +02:00
Volker Lendecke
9c48dbde06 dns_server: Fix CNAME handling
recs[i].wtype is == DNS_TYPE_CNAME, and my understanding of the union is that
data.cname is filled. We get away with this, because ipv4 and ipv6 have the
same char * representation, but it's confusing.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ira Cooper <ira@samba.org>

Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Tue Aug  4 13:41:17 CEST 2015 on sn-devel-104
2015-08-04 13:41:17 +02:00
Volker Lendecke
3fbcd78a75 dns_server: Add NULL check
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ira Cooper <ira@samba.org>
2015-08-04 10:35:17 +02:00
Stefan Metzmacher
0062a2f5fb s4:dns_server: allocate substructures of struct dns_request_state on the correct TALLOC_CTX
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2014-11-18 04:17:09 +01:00
Kai Blin
229f8b324a dns: Fix a compile warning by casting explicitly
Signed-off-by: Kai Blin <kai@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2014-10-30 06:52:04 +01:00
Stefan Metzmacher
31a2ddb361 s4:dns_server: make use of gensec_update_ev()
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2014-03-27 00:36:31 +01:00
Kai Blin
d9829df133 bug #10471: Don't respond with NXDOMAIN to records that exist with another type
DNS queries for records with the wrong type need to trigger an empty
response with RCODE_OK instead of returning NXDOMAIN.

This adds a test and fixes bug #10471

Signed-off-by: Kai Blin <kai@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2014-03-04 13:46:34 +01:00
Kai Blin
df43027bd8 dns: Support larger queries when asking forwarder
This should fix bug #9632

Signed-off-by: Kai Blin <kai@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
2013-05-26 18:13:28 +02:00
Kai Blin
4364a3faf6 dns: Add support for MX queries
Due to an oversight, the internal DNS server supports MX record updates,
but not MX record queries. Add support for MX queries and tests.

This should fix bug #9485

Signed-off-by: Kai Blin <kai@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
2013-05-16 21:40:35 +10:00
Kai Blin
f31bda6715 dns: Use new DNS debugclass in DNS server
Signed-off-by: Kai Blin <kai@samba.org>
Reviewed-By: Amitay Isaacs <amitay@gmail.com>
2013-05-16 21:40:15 +10:00
Kai Blin
8ba8020586 s4 dns: Make debug output less noisy
Autobuild-User(master): Kai Blin <kai@samba.org>
Autobuild-Date(master): Fri Sep  7 00:31:56 CEST 2012 on sn-devel-104
2012-09-07 00:31:56 +02:00
Kai Blin
956f41bddf s4 dns: When we got a TKEY, we need to remember which key to use for signing 2012-09-05 19:02:17 +02:00
Kai Blin
e81d026576 s4 dns: TKEY record needs to remember incoming algorithm
Samba3 (and older windows versions) use gss.microsoft.com, win7 (and the RFC) use gss-tsig
2012-09-05 19:02:17 +02:00
Kai Blin
c0e6a4b1b0 s4 dns: Move dns_find_tkey to an extra file 2012-09-05 19:02:16 +02:00
Kai Blin
558fa4c45a s4 dns: Revert erroneous push from wrong branch
I've pushed the wrong branch for this, sorry about that.

Autobuild-User(master): Kai Blin <kai@samba.org>
Autobuild-Date(master): Wed Sep  5 14:10:54 CEST 2012 on sn-devel-104
2012-09-05 14:10:54 +02:00
Kai Blin
fc9de26497 s4 dns: Handle GSS-TSIG signatures 2012-09-05 08:41:23 +02:00
Kai Blin
c256566aa9 s4 dns: Store TKEYs in a ringbuffer
This stops us from potentially being DoSed by tons of TKEYs

Autobuild-User(master): Kai Blin <kai@samba.org>
Autobuild-Date(master): Fri Aug 31 22:46:01 CEST 2012 on sn-devel-104
2012-08-31 22:46:01 +02:00
Kai Blin
7204dc9708 s4 dns: Negotiate GSSAPI-based TKEYs
Autobuild-User(master): Kai Blin <kai@samba.org>
Autobuild-Date(master): Fri Aug 31 10:38:35 CEST 2012 on sn-devel-104
2012-08-31 10:38:35 +02:00
Michael Adam
abe4798398 s4:dns-server: remove an extra blank line from handle_question() 2012-06-06 19:37:13 +02:00