The static arrays are supposed to be arrays of const pointers to int,
not arrays of non-const pointers to const int.
Fixing that means some bugs (scribbling on what's *supposed* to be a
const array) will be caught (see packet-ieee80211-radiotap.c for
examples, the first of which inspired this change and the second of
which was discovered while testing compiles with this change), and
removes the need for some annoying casts.
Also make some of those arrays static while we're at it.
Update documentation and dissector-generator tools.
Change-Id: I789da5fc60aadc15797cefecfd9a9fbe9a130ccc
Reviewed-on: https://code.wireshark.org/review/37517
Petri-Dish: Guy Harris <gharris@sonic.net>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>
Add Binary Output Change to the Read Objects list
Change-Id: I0e5a67fdba5d8b2412c05bc416feaa0fe81ace15
Reviewed-on: https://code.wireshark.org/review/31862
Petri-Dish: Graham Bloice <graham.bloice@trihedral.com>
Tested-by: Petri Dish Buildbot
Reviewed-by: Graham Bloice <graham.bloice@trihedral.com>
Make the time stamp precision a 4-bit bitfield, so, when combined with
the other bitfields, we have 32 bits. That means we put the flags at
the same structure level as the time stamp precision, so they can be
combined; that gets rid of an extra "flags." for references to the flags.
Put the two pointers next to each other, and after a multiple of 8 bytes
worth of other fields, so that there's no padding before or between them.
It's still not down to 64 bytes, which is the next lower power of 2, so
there's more work to do.
Change-Id: I6f3e9d9f6f48137bbee8f100c152d2c42adb8fbe
Reviewed-on: https://code.wireshark.org/review/31213
Petri-Dish: Guy Harris <guy@alum.mit.edu>
Tested-by: Petri Dish Buildbot
Reviewed-by: Guy Harris <guy@alum.mit.edu>
The calculation for relative times incorrectly converted ms to ns.
Change-Id: I4357d89e45b3f31a5c222e4b8f82edc720766a6e
Reviewed-on: https://code.wireshark.org/review/31009
Petri-Dish: Graham Bloice <graham.bloice@trihedral.com>
Tested-by: Petri Dish Buildbot
Reviewed-by: Graham Bloice <graham.bloice@trihedral.com>
- this change re-enables dissection of large lists of sequential objects lacking prefixes.
- corrected some object/variation text in the comments
Change-Id: Ia410f53198e9918509208739c94dbb4df4ecfc25
Reviewed-on: https://code.wireshark.org/review/29582
Petri-Dish: Anders Broman <a.broman58@gmail.com>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>
Chances are if there are a large number of "empty objects" (that don't increment packet
counter) it's an intentionally malicious packet and we should break the loop.
Bug: 14362
Change-Id: Id9a6f4270cc47188becdf4652f903d0ba4478dcb
Reviewed-on: https://code.wireshark.org/review/25497
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>
Add support for new objects g0v196-210
Rework handling of g0 objects
Change-Id: I64c46cf4709799711a7cc6ca77fe356e47dced62
Reviewed-on: https://code.wireshark.org/review/25086
Petri-Dish: Graham Bloice <graham.bloice@trihedral.com>
Tested-by: Petri Dish Buildbot
Reviewed-by: Graham Bloice <graham.bloice@trihedral.com>
Before if (al_obj & 0x02) was incorrectly being used to test if it was a
variation with a timestamp.
Now it is done in the same manor as Object 21 with a switch statement
that falls through if it isn't a timestamp variation.
Change-Id: I9adaf9c0be3ad01f1cf87ba09f47257daeadb47c
Reviewed-on: https://code.wireshark.org/review/24915
Reviewed-by: Graham Bloice <graham.bloice@trihedral.com>
Petri-Dish: Graham Bloice <graham.bloice@trihedral.com>
Tested-by: Petri Dish Buildbot
Reviewed-by: Michael Mann <mmann78@netscape.net>
Change from col_append_sep_fstr() to col_append_sep_str() when
appending strings without formatting.
Change-Id: I315aca9b815c204a5bc78f7326402c40d1325f0e
Reviewed-on: https://code.wireshark.org/review/20846
Petri-Dish: Stig Bjørlykke <stig@bjorlykke.org>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Anders Broman <a.broman58@gmail.com>
Rework Application Layer fragment reassembly to handle
out of order fragments (seen over UDP).
Change-Id: Ifd2bffba30f0a419a5f82ea6b9d2d221f7d6d276
Reviewed-on: https://code.wireshark.org/review/19947
Petri-Dish: Graham Bloice <graham.bloice@trihedral.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Graham Bloice <graham.bloice@trihedral.com>
Many of the register_init_routine/register_cleanup_routine functions
are for initializing and cleaning up a GHashtable.
wmem_map_new_autoreset can do that automatically, so convert many
of the simple cases.
Change-Id: I93e1f435845fd5a5e5286487e9f0092fae052f3e
Reviewed-on: https://code.wireshark.org/review/19912
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Dario Lombardo <lomato@gmail.com>
Tested-by: Dario Lombardo <lomato@gmail.com>
Reviewed-by: Michael Mann <mmann78@netscape.net>
Register all reassembly tables with a central unit, allowing the
central unit to have the callback that initializes and destroys
the reassembly tables, rather than have dissectors do it individually.
Change-Id: Ic92619c06fb5ba6f1c3012f613cae14982e101d4
Reviewed-on: https://code.wireshark.org/review/19834
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
It's a manual attempt at what proto_tree_add_bitmask can do anyway.
Change-Id: If551e8afa346a33b8e15dc441aae75ba0752ab46
Reviewed-on: https://code.wireshark.org/review/19257
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
Several calls to proto_tree_add_uint_format_value could be better served
using BASE_UNIT_STRING with a "unit string" in hf_ field. There also
a few cases where proto_tree_add_uint_format_value could just be
proto_tree_add_uint.
Added a few more "common" unit string values to unit_strings.[ch]
Change-Id: Iaedff82c515269c9c31ab9100dff19f5563c932d
Reviewed-on: https://code.wireshark.org/review/19242
Petri-Dish: Michael Mann <mmann78@netscape.net>
Reviewed-by: Michael Mann <mmann78@netscape.net>
Improve the dissection of the data chunks.
Change-Id: Ic87c84f0c3ea2ccceecb376698eed6b2f6a4e614
Reviewed-on: https://code.wireshark.org/review/18566
Reviewed-by: Michael Mann <mmann78@netscape.net>
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Roland Knall <rknall@gmail.com>
Similar to the "tcp.port" changes in I99604f95d426ad345f4b494598d94178b886eb67,
convert dissectors that use "udp.port".
More cleanup done on dissectors that use both TCP and UDP dissector
tables, so that less preference callbacks exist.
Change-Id: If07be9b9e850c244336a7069599cd554ce312dd3
Reviewed-on: https://code.wireshark.org/review/18120
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
This patch introduces new APIs to allow dissectors to have a preference for
a (TCP) port, but the underlying data is actually part of Decode As functionality.
For now the APIs are intentionally separate from the regular APIs that register a
dissector within a dissector table. It may be possible to eventually combine the
two so that all dissectors that register with a dissector table have an opportunity
to "automatically" have a preference to adjust the "table value" through the
preferences dialog.
The tcp.port dissector table was used as the guinea pig. This will eventually be
expanded to other dissector tables as well (most notably UDP ports). Some
dissectors that "shared" a TCP/UDP port preference were also converted. It also
removed the need for some preference callback functions (mostly when the callback
function was the proto_reg_handoff function) so there is cleanup around that.
Dissectors that has a port preference whose default was 0 were switched to using
the dissector_add_for_decode_as_with_preference API rather than dissector_add_uint_with_preference
Also added comments for TCP ports used that aren't IANA registered.
Change-Id: I99604f95d426ad345f4b494598d94178b886eb67
Reviewed-on: https://code.wireshark.org/review/17724
Reviewed-by: Michael Mann <mmann78@netscape.net>
Also some other tricks to remove unnecessary tvb_get_string_enc calls.
Change-Id: I2f40d9175b6c0bb0b1364b4089bfaa287edf0914
Reviewed-on: https://code.wireshark.org/review/16158
Petri-Dish: Pascal Quantin <pascal.quantin@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
Reviewed-by: Pascal Quantin <pascal.quantin@gmail.com>
ei_dnp3_buffering_user_data_until_final_frame_is_received is #if 0ed
out in the code, so reciprocate that to the declaration/array.
Change-Id: I65dc6bb6f93f736e3adc4f4134f3bdca1f890bf9
Reviewed-on: https://code.wireshark.org/review/15749
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
'ieee17221.clock_source_id' exists multiple times with NOT compatible types: FT_UINT16 and FT_UINT64
'ieee17221.stream_format' exists multiple times with NOT compatible types: FT_NONE and FT_UINT64
'afp.unknown' exists multiple times with NOT compatible types: FT_UINT16 and FT_BYTES
'afp.toc_offset' exists multiple times with NOT compatible types: FT_NONE and FT_UINT64
'bootp.client_id.iaid' exists multiple times with NOT compatible types: FT_UINT32 and FT_STRING
'bthfp.chld.mode' exists multiple times with NOT compatible types: FT_STRING and FT_UINT8
'canopen.pdo.data' exists multiple times with NOT compatible types: FT_STRINGZ and FT_BYTES
'canopen.sdo.data' exists multiple times with NOT compatible types: FT_UINT32 and FT_BYTES
'ceph.msg.' exists multiple times with NOT compatible types: FT_UINT32 and FT_UINT64
'ceph.version' exists multiple times with NOT compatible types: FT_UINT16 and FT_UINT64
'cip.linkaddress' exists multiple times with NOT compatible types: FT_STRING and FT_UINT8
'dnp3.al.ana' exists multiple times with NOT compatible types: FT_FLOAT and FT_INT32
'dnp3.al.anaout' exists multiple times with NOT compatible types: FT_FLOAT and FT_INT32
'dtls.handshake.cert_url.url_hash_len' exists multiple times with NOT compatible types: FT_STRING and FT_UINT16
'ssl.handshake.cert_url.url_hash_len' exists multiple times with NOT compatible types: FT_STRING and FT_UINT16
'dvb-s2_gse.label' exists multiple times with NOT compatible types: FT_UINT24 and FT_ETHER
'fcdns.rply.fc4type' exists multiple times with NOT compatible types: FT_NONE and FT_UINT8
'fcdns.req.fc4type' exists multiple times with NOT compatible types: FT_NONE and FT_UINT8
'icmp.int_info.name' exists multiple times with NOT compatible types: FT_STRING and FT_BOOLEAN
'icmpv6.ilnp.nb_locs' exists multiple times with NOT compatible types: FT_UINT64 and FT_UINT8
'icmpv6.ilnp.nb_locs' exists multiple times with NOT compatible types: FT_UINT32 and FT_UINT64
'mausb.clear_transfers.status' exists multiple times with NOT compatible types: FT_BOOLEAN and FT_NONE
'mikey.v' exists multiple times with NOT compatible types: FT_BOOLEAN and FT_NONE
'mswsp.rangeboundry.ultype' exists multiple times with NOT compatible types: FT_STRING and FT_UINT32
'mswsp.arrayvector.address64' exists multiple times with NOT compatible types: FT_UINT32 and FT_UINT64
'nlm.lock.l_offset' exists multiple times with NOT compatible types: FT_UINT32 and FT_UINT64
'nlm.lock.l_len' exists multiple times with NOT compatible types: FT_UINT32 and FT_UINT64
'pflog.saddr' exists multiple times with NOT compatible types: FT_IPv6 and FT_IPv4
'pflog.daddr' exists multiple times with NOT compatible types: FT_IPv6 and FT_IPv4
'pflog.saddr' exists multiple times with NOT compatible types: FT_BYTES and FT_IPv6
'pflog.daddr' exists multiple times with NOT compatible types: FT_BYTES and FT_IPv6
'pgm.spm.path' exists multiple times with NOT compatible types: FT_IPv6 and FT_IPv4
'pgm.nak.src' exists multiple times with NOT compatible types: FT_IPv6 and FT_IPv4
'pgm.nak.grp' exists multiple times with NOT compatible types: FT_IPv6 and FT_IPv4
'pgm.poll.path' exists multiple times with NOT compatible types: FT_IPv6 and FT_IPv4
'pgm.opts.ccdata.acker' exists multiple times with NOT compatible types: FT_IPv6 and FT_IPv4
'pgm.opts.ccdata.acker' exists multiple times with NOT compatible types: FT_IPv4 and FT_IPv6
'pgm.opts.ccdata.acker' exists multiple times with NOT compatible types: FT_IPv6 and FT_IPv4
'pgm.opts.redirect.dlr' exists multiple times with NOT compatible types: FT_IPv6 and FT_IPv4
Change-Id: Iaf694699d108a12db172da8dd9fbab211adb329d
Reviewed-on: https://code.wireshark.org/review/14070
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
Cleaned up handling of the qualifier field. Sub-parts are now
identified as the prefix and range rather than index and code.
This has changed the field names;
dnp3.al.objq.index -> dnp3.al.objq.prefix
dnp3.al.objq.code -> dnp3.al.objq.range
and the associated packet tree details text strings.
Change-Id: I42d51b71233303eaf8b37982dd15b5090918630b
Reviewed-on: https://code.wireshark.org/review/12998
Petri-Dish: Graham Bloice <graham.bloice@trihedral.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Graham Bloice <graham.bloice@trihedral.com>
Bug: 11938
Change-Id: Icd59092a3139b8c22f3866017a093a8b1270f1b2
Reviewed-on: https://code.wireshark.org/review/12940
Reviewed-by: Michael Mann <mmann78@netscape.net>
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Anders Broman <a.broman58@gmail.com>
Change-Id: Ie39ef054a4a942687bd079f3a4d8c2cc55d5f22c
Reviewed-on: https://code.wireshark.org/review/12485
Petri-Dish: Michael Mann <mmann78@netscape.net>
Reviewed-by: Michael Mann <mmann78@netscape.net>
Some of the ASN.1 dissectors still generate a new_create_dissector_handle from the tool itself, so leave those for now.
Change-Id: Ic6e5803b1444d7ac24070949f5fd557909a5641f
Reviewed-on: https://code.wireshark.org/review/12484
Petri-Dish: Anders Broman <a.broman58@gmail.com>
Reviewed-by: Michael Mann <mmann78@netscape.net>
It ends up dragging in libwireshark headers, which programs not linking
with libwireshark shouldn't do. In particular, including
<epan/address.h> causes some functions that refer to libwireshark
functions to be defined if the compiler doesn't handle "static inline"
the way GCC does, and you end up requiring libwireshark even though you
shouldn't require it.
Move plurality() to wsutil/str_util.h, so that non-libwireshark code can
get it without include epan/packet.h. Fix includes as necessary.
Change-Id: Ie4819719da4c2b349f61445112aa419e99b977d3
Reviewed-on: https://code.wireshark.org/review/11545
Reviewed-by: Guy Harris <guy@alum.mit.edu>
Add heuristic support
Better documentation
Change-Id: I236c1f4d3613aa58d608aee0e5edc40c3b158d25
Reviewed-on: https://code.wireshark.org/review/10120
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
It works similar to tcp_dissect_pdus, but only works on a single packet. Intended for protocols that go over TCP and UDP so that they can have a common dissection function.
Will of course, also work on UDP-only protocols with a fixed length header and size.
Used DNP3 as a guinea pig since "multiple PDU support" over UDP was just added.
Change-Id: Ib7af8eaf7102c96b4f8b5c1b891ae2d8f0886f9d
Reviewed-on: https://code.wireshark.org/review/10083
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Hadriel Kaplan <hadrielk@yahoo.com>
Reviewed-by: Dario Lombardo <lomato@gmail.com>
Reviewed-by: Anders Broman <a.broman58@gmail.com>
Bug: 11435
Change-Id: I1f3006a4276e8a95d028294ebb9635f71be0f75e
Reviewed-on: https://code.wireshark.org/review/10013
Reviewed-by: Graham Bloice <graham.bloice@trihedral.com>
Petri-Dish: Graham Bloice <graham.bloice@trihedral.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
The preferences are still supported for backwards compatibility, but the heuristic_protos file has final say on the "preference" to enable/disable a heuristic dissector.
Also add parameter to heur_dissector_add() for the "default" enable/disable of a heuristic dissector. With this parameter, a few more (presumably weak) heuristic dissectors have been "registered" but of course default to being disabled.
Change-Id: I51bebb2146ef3fbb8418d4f5c7f2cb2b58003a22
Reviewed-on: https://code.wireshark.org/review/9610
Petri-Dish: Michael Mann <mmann78@netscape.net>
Reviewed-by: Roland Knall <rknall@gmail.com>
Reviewed-by: Hadriel Kaplan <hadrielk@yahoo.com>
Reviewed-by: Michael Mann <mmann78@netscape.net>
This allows better presentation of heuristic dissectors to the end user.
Change-Id: I2ff3985ab914e83c2989880cc0c7b9904045b3f6
Reviewed-on: https://code.wireshark.org/review/9602
Petri-Dish: Michael Mann <mmann78@netscape.net>
Reviewed-by: Michael Mann <mmann78@netscape.net>
This patch moves g_hash_table_destroy calls from the init routine to
the cleanup routine. Besides that, the conditional check for the hash
table has been removed, assuming that init is always paired with a
cleanup call.
If reassembly_table_init is found, a reassembly_table_destroy call is
prepended to the cleanup function as well.
Comments have been removed from the init function as well as these did
not seem to have additional value ("destroy hash table" is clear from
the context).
The changes were automatically generated using
https://git.lekensteyn.nl/peter/wireshark-notes/diff/one-off/cleanup-rewrite.py?id=4d11f07180d9c115eb14bd860e9a47d82d3d1dcd
Manually edited files (for assignment auditing): dvbci, ositp, sccp,
tcp.
Other files that needed special attention due to the use of
register_postseq_cleanup_routine:
- ipx: keep call, do not add another cleanup routine.
- ncp: remove empty mncp_postseq_cleanup. mncp_hash_lookup is used
even if a frame is visited before (see dissect_ncp_common), hence
the hash table cannot be destroyed here. Do it in cleanup instead.
- ndps: add cleanup routine to kill reassembly table, but do not
destroy the hash table as it is already done in ndps_postseq_cleanup.
Change-Id: I95a72b3df2978b2c13fefff6bd6821442193d0ed
Reviewed-on: https://code.wireshark.org/review/9223
Reviewed-by: Michael Mann <mmann78@netscape.net>
packet-dnp.c:2735:28: error: variable 'al_filename' set but not used [-Werror=unused-but-set-variable]
packet-dnp.c:1843:32: error: variable 'al_filename_offs' set but not used [-Werror=unused-but-set-variable]
Change-Id: Ia84b270aa8f56fb4104fb875339dc3d39c6105c6
Reviewed-on: https://code.wireshark.org/review/9020
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
Change-Id: I979990e9385182870ce4809a7e6fa16e598cb2be
Reviewed-on: https://code.wireshark.org/review/9016
Reviewed-by: Michael Mann <mmann78@netscape.net>
Petri-Dish: Michael Mann <mmann78@netscape.net>
Reviewed-by: Anders Broman <a.broman58@gmail.com>
Just use Decode As directly.
Change-Id: Iab03a6ff8a70c3c6b0406f426e622eb52bb34ba7
Reviewed-on: https://code.wireshark.org/review/7902
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
Provide a way for Lua-based dissectors to invoke tcp_dissect_pdus()
to make TCP-based dissection easier.
Bug: 9851
Change-Id: I91630ebf1f1fc1964118b6750cc34238e18a8ad3
Reviewed-on: https://code.wireshark.org/review/6778
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
Reviewed-by: Hadriel Kaplan <hadrielk@yahoo.com>
Tested-by: Hadriel Kaplan <hadrielk@yahoo.com>
Specifically:
- Set packet.h to be the first wireshark #include after
config.h and "system" #includes.
packet.h added as an #include in some cases when missing.
- Remove some #includes included (directly/indirectly) in
packet.h. E.g., glib.h.
(Done only for those files including packet.h).
- As needed, move "system" #includes to be after config.h and
before wireshark #includes.
- Rework various #include file specifications for consistency.
- Misc.
Change-Id: Ifaa1a14b50b69fbad38ea4838a49dfe595c54c95
Reviewed-on: https://code.wireshark.org/review/5923
Petri-Dish: Alexis La Goutte <alexis.lagoutte@gmail.com>
Reviewed-by: Bill Meier <wmeier@newsguy.com>
Part 2 of many
Change-Id: I50815e7738b011382392f3078a7107d3d9eec4ec
Reviewed-on: https://code.wireshark.org/review/5542
Reviewed-by: Michael Mann <mmann78@netscape.net>
Petri-Dish: Michael Mann <mmann78@netscape.net>
Reviewed-by: Anders Broman <a.broman58@gmail.com>
- Fix for Single-bit Objects offset-pointer
- Enhancement for Obj 12 Var 2 (Pattern Control Block) and Var 3 (Pattern Mask) Decoding
Bug: 10558
Change-Id: I8d3f6cee4acbab09d0b93dab6b868cddd842b682
Reviewed-on: https://code.wireshark.org/review/4597
Reviewed-by: Michael Mann <mmann78@netscape.net>
Change-Id: I6b6a05ec242e4798fb56ffa43c661ec277aca955
Reviewed-on: https://code.wireshark.org/review/3984
Reviewed-by: Chris Bontje <cbontje@gmail.com>
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
There are routines that take a buffer and a length and that take a
tvbuff, offset, and length; use those routines in the DNP dissector
(which no longer needs its own table and loop), and use the tvbuff
routine instead of calling tvb_get_ptr().
Change-Id: Ic67b0f3b65b94ea47c0fdc2f3d3b6f88df77f9c6
Reviewed-on: https://code.wireshark.org/review/3505
Reviewed-by: Guy Harris <guy@alum.mit.edu>
Guy Harris