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This breaks the ABI so we merge this into the unreleased libndr-1.0.0.
The advantage of the new functions is there (except for print, which
is unchanged) is an error raised when the token is not found, so
we can be confident in the changes to the token behaviour.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13876
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Thu Dec 12 03:56:23 UTC 2019 on sn-devel-184
By removing this we know we do not need to worry about this list
growing without bounds. We merge this into the recently created but
not yet released ABI 1.0.0
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13876
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
This avoids really long token lists for switch values
that will not be needed past this point.
The function name is changed to clarify what exactly is being
done here, and the old function is removed to ensure it is
not being used anywhere else.
Merge the removal of ndr_print_get_switch_value into
just-tagged librpc/ABI/ndr-1.0.0.sigs as this
has not been put into any release yet.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13876
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
This will allow generated code to instead push and pop union values onto the
switch_list stack, which is more memory efficient than creating a single large
list to be scannned and eventually discarded.
Merge into unreleased ABI 1.0.0
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13876
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
This should aid in debugging NDR parse failures.
Use the ABI bump to again exclude ndr_table_misc incorrectly
added in ABI 0.2.1.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Tue Nov 19 14:47:46 UTC 2019 on sn-devel-184
Generate code to allow ndrdump to operate on public structures.
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
librpc/ndr/ndr.c:1430 runtime error: left shift of 1 by 31 places cannot
be represented in type 'int'
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
Autobuild-User(master): Gary Lockyer <gary@samba.org>
Autobuild-Date(master): Fri Nov 23 01:23:09 CET 2018 on sn-devel-144
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>
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>
This flag can be used to change marshalling behaviour with regard to
compression.
Example: DNS packets make use of so called DNS name compression which
means that for identical strings in a DNS packet, the second string is
replaced with a reference (an offset) to the first.
Setting this flag requests to turns off the marshalling compression.
This will be used in the next commit to prevent name compression in DNS
TSIG records.
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>
This allows us to remove talloc() calls from GUID_from_ndr_blob().
To do this the struct ndr_pull is placed on the stack, and filled in there.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Switch values currently only have a peek variant, instead of a retrieve
variant for getting their values. This can create performance issues
with complex structures as the token list simply grows longer.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
This allows public headers to not include samba_util.h, but rather
specific header files under lib/util.
Signed-Off-By: Jelmer Vernooij <jelmer@samba.org>
Reviewed-By: Andrew Bartlett <abartlet@samba.org>
Reviewed-By: Stefan Metzmacher <metze@samba.org>
They can be used to parse a fragmented NDR byte stream.
ndr_pull_append() appends more data that can be processed
and ndr_pull_pop() removed already processed data.
This will be used to implement dcerpc pipes, where we can get
a verify large amount of pipe chunks, once we processed a chunk
we can forget about the related data, but we may need to keep some
bytes in order to get the alignment right.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
If we pull a pipe chunk we need a way to check if we
have enough bytes to parse the complete chunk.
Setting ndr_pull->flags |= LIBNDR_FLAG_INCOMPLETE_BUFFER
would change NDR_ERR_BUFSIZE (and later maybe others)
into NDR_ERR_INCOMPLETE_BUFFER.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
This lets ndr_pull_subcontext_end() make sure that all
subcontext bytes are consumed otherwise it returns NDR_ERR_UNREAD_BYTES.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Treat LIBNDR_FLAG_NOALIGN and LIBNDR_FLAG_REMAINING the same as the
other align flags - make them mutually exclusive.
Combined work from Metze, Günther and Jeremy.
The same as ndr_pull_charset(), however only perform character
conversion on bytes prior to and including the null terminator.
Signed-off-by: Jeremy Allison <jra@samba.org>
We have 3 different types of flags values in our NDR layer. We've
recently found bugs where these types of flags have been mixed up,
especially by people adding hand written ndr code for tricky
structures. We previously got away with this because (for example)
NDR_SCALARS and NDR_IN had the same value, so mixing up the two
concepts sometimes worked. Unfortunately it also led to bugs where we
didn't do what was expected, such as in our smbtorture ndr test suite,
where passing a ndr_flags value of zero led to only checking that two
empty structures were equal.
This changes the values of the NDR_IN|NDR_OUT and
NDR_SCALARS|NDR_BUFFERS values to be in different bit ranges, and adds
macros for checking the validity of passed in flags. A followup patch
modifies the ndr calls to use these macros, and pidl to generate
them. This should catch misuse of the APIs.
Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
