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2021-02-23wiretap: rename wtap_register_file_type_subtypes().Guy Harris1-1/+1
It only registers one file type/subtype, so rename it to wtap_register_file_type_subtype(). That will also force plugins to be recompiled; that will produce compile errors for some plugins that didn't change to match the new contents of the file_type_subtype_info structure. Also check to make sure that the registered file type/subtype supports at least one type of block; a file type/subtype that doesn't return *any* blocks and doesn't permit *any* block types to be written is not very useful. That should also catch most if not all other plugins that didn't change to match the new contents of the file_type_subtype_info structure. Don't make errors registering a file type/subtype fatal; just complain, don't register the bogus file type/subtype, and drive on.
2021-02-21wiretap: have file handlers advertise blocks and options supported.Guy Harris1-1/+8
Instead of a "supports name resolution" Boolean and bitflags for types of comments supported, provide a list of block types that the file type/subtype supports, with each block type having a list of options supported. Indicate whether "supported" means "one instance" or "multiple instances". "Supports" doesn't just mean "can be written", it also means "could be read". Rename WTAP_BLOCK_IF_DESCRIPTION to WTAP_BLOCK_IF_ID_AND_INFO, to indicate that it provides, in addition to information about the interface, an ID (implicitly, in pcapng files, by its ordinal number) that is associated with every packet in the file. Emphasize that in comments - just because your capture file format can list the interfaces on which a capture was done, that doesn't mean it supports this; it doesn't do so if the file doesn't indicate, for every packet, on which of those interfaces it was captured (I'm looking at *you*, Microsoft Network Monitor...). Use APIs to query that information to do what the "does this file type/subtype support name resolution information", "does this file type/subtype support all of these comment types", and "does this file type/subtype support - and require - interface IDs" APIs did. Provide backwards compatibility for Lua. This allows us to eliminate the WTAP_FILE_TYPE_SUBTYPE_ values for IBM's iptrace; do so.
2021-02-17wiretap: more work on file type/subtypes.Guy Harris1-2/+8
Provide a wiretap routine to get an array of all savable file type/subtypes, sorted with pcap and pcapng at the top, followed by the other types, sorted either by the name or the description. Use that routine to list options for the -F flag for various commands Rename wtap_get_savable_file_types_subtypes() to wtap_get_savable_file_types_subtypes_for_file(), to indicate that it provides an array of all file type/subtypes in which a given file can be saved. Have it sort all types, other than the default type/subtype and, if there is one, the "other" type (both of which are put at the top), by the name or the description. Don't allow wtap_register_file_type_subtypes() to override any existing registrations; have them always register a new type. In that routine, if there are any emply slots in the table, due to an entry being unregistered, use it rather than allocating a new slot. Don't allow unregistration of built-in types. Rename the "dump open table" to the "file type/subtype table", as it has entries for all types/subtypes, even if we can't write them. Initialize that table in a routine that pre-allocates the GArray before filling it with built-in types/subtypes, so it doesn't keep getting reallocated. Get rid of wtap_num_file_types_subtypes - it's just a copy of the size of the GArray. Don't have wtap_file_type_subtype_description() crash if handed an file type/subtype that isn't a valid array index - just return NULL, as we do with wtap_file_type_subtype_name(). In wtap_name_to_file_type_subtype(), don't use WTAP_FILE_TYPE_SUBTYPE_ names for the backwards-compatibility names - map those names to the current names, and then look them up. This reduces the number of uses of hardwired WTAP_FILE_TYPE_SUBTYPE_ values. Clean up the type of wtap_module_count - it has no need to be a gulong. Have built-in wiretap file handlers register names to be used for their file type/subtypes, rather than building the table in init.lua. Add a new Lua C function get_wtap_filetypes() to construct the wtap_filetypes table, based on the registered names, and use it in init.lua. Add a #define WSLUA_INTERNAL_FUNCTION to register functions intended only for internal use in init.lua, so they can be made available from Lua without being documented. Get rid of WTAP_NUM_FILE_TYPES_SUBTYPES - most code has no need to use it, as it can just request arrays of types, and the space of type/subtype codes can be sparse due to registration in any case, so code has to be careful using it. wtap_get_num_file_types_subtypes() is no longer used, so remove it. It returns the number of elements in the file type/subtype array, which is not necessarily the name of known file type/subtypes, as there may have been some deregistered types, and those types do *not* get removed from the array, they just get cleared so that they're available for future allocation (we don't want the indices of any registered types to changes if another type is deregistered, as those indicates are the type/subtype values, so we can't shrink the array). Clean up white space and remove some comments that shouldn't have been added.
2021-02-14wiretap: register most built-in file types from its module.Guy Harris1-1/+17
Remove most of the built-in file types from the table in wiretap/file_access.c and, instead, have the file types register themselves, using wtap_register_file_type_subtypes(). This reduces the source code changes needed to add a new file type from three (add the handler, add the file type to the table in file_access.c, add a #define for the file type in wiretap/wtap.h) to one (add the handler). (It also requires adding the handler's source file to wiretap/CMakeLists.txt, but that's required in both cases.) A few remain because the WTAP_FILE_TYPE_SUBTYPE_ #define is used elsewhere; that needs to be fixed. Fix the wiretap/CMakefile.txt file to scan k12text.l, as that now contains a registration routine. In the process, avoid scanning files that don't implement a file type and won't ever have a registration routine. Add a Lua routine to fetch the total number of file types; we use that in some code to construct the wtap_filetypes table, which we need to do in order to continue to have all the values that used to come from the WTAP_FILE_TYPE_SUBTYPE_ types. While we're at it, add modelines to a file that lacked them.
2019-07-26HTTPS (almost) everywhere.Guy Harris1-1/+1
Change all wireshark.org URLs to use https. Fix some broken links while we're at it. Change-Id: I161bf8eeca43b8027605acea666032da86f5ea1c Reviewed-on: https://code.wireshark.org/review/34089 Reviewed-by: Guy Harris <guy@alum.mit.edu>
2018-11-10wiretap: fix truncated reads while reading compressed file formatsPeter Wu1-95/+6
A lot of file dissectors (pcapng, json, etc.) assumed that the packet size is equal to the file size. This is not true if the file was compressed and could result in silently truncating reads or failing to open a file (if the compressed file is larger than the actual data). Observe that a lot of file dissectors are simply copies of each other. Move the fixed implementation to wtap.c and reuse the methods everywhere else. While at it, avoid an unnecessary large allocation/read in ruby_marshal. Change-Id: I8e9cd0af9c4d1bd37789a3b509146ae2182a5379 Reviewed-on: https://code.wireshark.org/review/30570 Petri-Dish: Peter Wu <peter@lekensteyn.nl> Reviewed-by: Dario Lombardo <lomato@gmail.com> Tested-by: Dario Lombardo <lomato@gmail.com> Tested-by: Petri Dish Buildbot Reviewed-by: Michael Mann <mmann78@netscape.net>
2018-06-07wiretap: add support for ruby marshal object files.Dario Lombardo1-0/+183
Change-Id: Iefba3b15c907966bb0b8d5c0ff9b6bb7097d326e Reviewed-on: https://code.wireshark.org/review/27763 Petri-Dish: Jaap Keuter <jaap.keuter@xs4all.nl> Tested-by: Petri Dish Buildbot Reviewed-by: Anders Broman <a.broman58@gmail.com>