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read_hex_bytes() is going to be used in lib/util/rfc1738.c.
parse_guid_string() is shifted for two reasons: Firstly, it is called
very often in some operations, sometimes constituting a few percent of
the CPU load, and it makes several calls to read_hex_bytes(). We want
the compiler to be able to inline those calls if it thinks that is
wise. Secondly, there are other places that could do with fast GUID
parsing.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
When pulling for example an RRSIG record, we end up with length!=0 *and*
unexpected.length != 0, but with an unknown rrec. We should be able to
marshall what we retrieved from the wire.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This means that the default print binding string qualifier will now go via this debug class
as will explicit calls to ndr_print_debug() and ndr_print_union_debug().
Calls to ndr_print_debugc() are not changed.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Allocate them off the NULL context not the talloc_autofree_context().
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12932
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
The range included the unused (1<<14) before.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12782
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
The ndr token code keeps a temporary store of tokens which are
referred to a small number of times (often once) before being
discarded. The access patterns are somewhat stack-like, with recently
placed tokens being accessed most often.
The old code kept these tokens in a linked list, which we replace with
a self-resizing array.
This keeps everything roughly the same in big-O terms, but makes it
all faster in practice by vastly reducing the amount of tallocing and
pointer-chasing.
The peak memory use is strictly reduced. On a 64 bit machine each core
token struct fits in 16 bytes (after padding) while the two pointers
used by the DLIST add another 16 bytes, so the overall list allocation
is the same as the peak 2n array allocation -- except in the list case
it is dwarfed by the talloc and malloc metadata overhead.
Before settling on the resized arrays, we tried red-black trees, which
are bound to be better for large ndr structures. As it happens, we
don't deal with large structures (the size of replication clumps is
limited to 400 objects) and the asymptotic benefits of the trees are
not realised in practice.
With luck you should find graphs comparing the performance of these
various techniques at:
https://www.samba.org/~dbagnall/perf-tests/ndr-token/
This necessarily breaks the ABI because the linked list implementation
was publicly exposed.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Thu Mar 2 08:38:22 CET 2017 on sn-devel-144
We were crashing earlier when calculating the length of NULL strings in
fixed size arrays (noticed while replying with an empty
spoolss_CorePrinterDriver struct within the spoolss_GetCorePrinterDrivers
call).
Guenther
Signed-off-by: Guenther Deschner <gd@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Thanks to Trend Micro's Zero Day Initiative and Frederic Besler for finding
this vulnerability with a PoC and a good analysis.
Signed-off-by: Volker Lendecke <vl@samba.org>
Bug: https://bugzilla.samba.org/show_bug.cgi?id=12409
GUID_from_data_blob() was relying on sscanf to parse strings, which was
slow and quite accepting of invalid GUIDs. Instead we directly read a
fixed number of hex bytes for each field.
This now passes the samba4.local.ndr.*.guid_from_string_invalid tests.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Douglas Bagnall <dbagnall@samba.org>
Autobuild-Date(master): Wed Dec 14 08:55:42 CET 2016 on sn-devel-144
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Dec 1 05:53:43 CET 2016 on sn-devel-144
This allows processing of Windows Cabinet files (required for the MS-PAR
print protocol implementation)
Guenther
Signed-off-by: Guenther Deschner <gd@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
This change makes automatic mapping for PAR->RPRN opcodes easier.
Guenther
Signed-off-by: Guenther Deschner <gd@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
This allows us to allocate only the correct size, not a default of 1024 bytes
per push.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
We need to have two subcontexts to get the padding right,
the outer subcontext uses NDR_ROUND(_ndr_size, 8), while
the inner subcontext only uses _ndr_size.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
This commit moves the autogenerated ndr_{pull,push}_supplementalCredentialsSubBlob()
function to the handwritten librpc/ndr/ndr_drsblobs.c
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11441
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
This is often found in inner loops in the dsdb code, because LDB DNs often contain a GUID string
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Certain DNS clients fail TSIG record MAC validation if the TSIG record
contains compressed strings.
Windows DNS server behaviour seems to be to not send compressed names in
TKEY and TSIG records.
This patch ensures we conform to this behaviour.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=11520
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
