"compute_offset_length()", and throw the exception it returns, rather
than calling "tvb_length_remaining()" and throw BoundsError if it
returns -1; this allows us to add additional exceptions without having
to change "tvb_ensure_length_remaining()".
Make "_tvb_get_nstringz()" static, as it's not used outside "tvbuff.c".
svn path=/trunk/; revision=5397
a negative value.
Use "tvb_ensure_length_remaining()" in "tcp_dissect_pdus()", rather than
checking the return value of "tvb_length_remaining()" ourselves, and
make various variables and parameters in it "guint" as appropriate.
svn path=/trunk/; revision=5396
where the pointer to "dissect_data()" was in 0.9.3; the pointer to
"dissect_data()" wasn't initialized in 0.9.3 (as the function wasn't
exported - you call it through a handle), so no plugin should have been
using it, and putting the pointer to "tcp_dissect_pdus()" in its place
means the structure offsets of all function pointers after it will be
the same in 0.9.3 and the next release, preserving binary compatibility
for plugins.
svn path=/trunk/; revision=5395
extracting PDUs from it and possibly doing reassembly. Make the COPS,
DNS, DSI, Gryphon, and SCCP dissectors use it.
Add "set_actual_length()", "tcp_dissect_pdus()",
"decode_boolean_bitfield()", "decode_numeric_bitfield()", and
"decode_enumerated_bitfield()" to the list of routines available to
dissectors on platforms where routines in the main program aren't
available to dynamically-loaded code.
Declare routines in "to_str.h" as "extern"; as I remember, that's
necessary to allow the "decode_XXX_bitfield()" routines declared therein
to be made available to plugins as per the above.
Note that new exported routines should be added to the end of the table
if that's the only change being made to the table.
Create a new "plugin_api_decls.h" header file, used to declare both the
"p_" variables and the "p_" structure members in the routine-exporting
mechanism; this reduces the number of places you have to change to
change the list of exported routines.
svn path=/trunk/; revision=5394
move the code from "dfilter_lookup_token()" into
"proto_registrar_get_byname()", and get rid of "dfilter_lookup_token()"
and have its callers call "proto_registrar_get_byname()" instead.
svn path=/trunk/; revision=5287
that return an "int", giving either an indication of how much data was
dissected, an indication of how much more data is needed from TCP to
dissect, or 0, meaning "this isn't one of my packets").
svn path=/trunk/; revision=5260
return types of the tvbuff accessors for floating-point types, to more
closely match the tvbuff accessors for integral types.
Fix an error in the code for fetching doubles on VAXes, and get rid of
unused union members on VAXes.
svn path=/trunk/; revision=5245
IEEE-float-to-native-float code, and use that as the basis for
IEEE-double-to-native-double code. Use that code on VAXes.
Eliminate "ieee-float.h", as we no longer use it; instead, we use the
tvbuff routines for extracting IEEE floating-point numbers.
svn path=/trunk/; revision=5243
Fix the display filter expression generated for protocol tree items
without named fields attached to them; the length defaults to 1 if not
specified in a range expression, so the length should be specified.
svn path=/trunk/; revision=5208
double-precision floating-point numbers, in big-endian and little-endian
format (hopefully there aren't any middle-endian formats; if there are,
we'll have to add them), from a tvbuff, and to return floats (for
single-precision) and doubles (for double-precision).
svn path=/trunk/; revision=5147
ETT_NONE entry.
Initialize the "tree_type" field of a "field_info" structure to -1,
meaning "this has not been given a subtree". Add checks before using
that field that it's in range. That way, you have to create a subtree
before putting protocol tree items under another item.
We allocate the "tree_is_expanded" array when we've registered all
dissectors; there's no need to allocate it while we're registering
dissectors and, in fact, doing so means we leak memory (the memory for
the version we allocated while registering dissectors).
svn path=/trunk/; revision=5068
representation string - set the representation string to the default
representation. This lets you append to an item that's been added with
"proto_tree_add_XXX" calls that don't explicitly format the
representation string.
svn path=/trunk/; revision=4973
end of the tvbuff is reached before the maximum_length passed by the
caller is reached and before a terminating NUL is found. In this case,
tvb_get_nstringz() returns a -1, but if the string is not artificially
terminated with a NUL by tvb_get_nstringz(), the
caller has no idea where the string should end because 1) the
return value "-1" gives the impression that the string ends
at the end of the buffer but 2) the string does
not end at the end of the buffer, but somewhere in the middle, due
to the packet being shorter than expected.
tvb_get_nstringz() and tvb_get_nstringz0() were both modified.
The FT_STRINGZ case in proto_tree_add_item() is made simpler.
During regression testing, when investigating a regression that I later
corrected, I discovered that strings added through proto_tree_add_item
(FT_STRING, FT_STRINGZ, and FT_UINT_STRING) leaked memory due to double
allocation of the string. The proto_tree_add_string*() functions do
not leak memory, since they only copy the string once. The memory
leak was fixed by adding another argument to the static function
proto_tree_set_string() to let the string ftype code know to g_strdup()
the string or not.
svn path=/trunk/; revision=4891
scripts, and check in changes to add _U_ to some unused arguments (some
other should perhaps be used, so we leave the _U_ out so that the
warnings serve as a reminder to check those).
svn path=/trunk/; revision=4848
In the "configure.in" files, add
-D_U_="__attribute__((unused))"
to CFLAGS if we're using GCC, and add
-D_U_=""
otherwise, so _U_ can be used to mark arguments as unused.
Add -D_U_="" arguments to the Makefile.nmake files as well, so _U_ works
with Microsoft Visual C++ as well.
Add comments and RCS IDs to the Makefile.nmake files that don't already
have them.
svn path=/trunk/; revision=4824
non-existent functions.
Remove the "filetype" argument from the "can_write_encap" functions for
particular capture file types - the argument value is implicit, in that
the routine being called is the routine for that particular file type.
svn path=/trunk/; revision=4823
dissectors. "Old-style" dissectors return nothing. "New-style"
dissectors return one of:
a positive integer, giving the number of bytes worth of data in
the tvbuff that it considered to be part of the PDU in the
tvbuff;
zero, if it didn't consider the data in the tvbuff to be a PDU
for its protocol;
a negative integer, giving the number of additional bytes worth
of data in needs to get the complete PDU (for use with
fragmentation/segmentation when the length of the PDU isn't
known to the protocol atop the one the dissector is dissecting).
Have "call_dissector()" return the return value of new-style dissectors,
and the length of the tvbuff handed to it for old-style dissectors.
Have "dissector_try_port()" return FALSE if the subdissector is a
new-style dissector and returned 0.
Make the EAP dissector a new-style dissector, and have a "EAP fragment"
dissector that is also a new-style dissector and handles fragmentation
of EAP messages (as happens above, for example, RADIUS). Also, clean up
some signed vs. unsigned comparison problems.
Reassemble EAP-Message AVPs in RADIUS.
svn path=/trunk/; revision=4811
"init_dissection()" which calls "epan_conversation_init()", does the
work that "init_all_protocols()" did, and then calls
"reassemble_init()", so that the standard sequence of dissection
initialization is done in one place, rather than having multiple places
call the same sequence of routines.
svn path=/trunk/; revision=4797
packets per segment.
Instead of having a routine for dissectors such as the Q.931 dissector
to call to dissect the TPKT header, have a routine that does all the
reassembly and multiple-packets-per-segment work, and have the Q.931
dissector call it. Export "is_tpkt()", and the new routine, to plugins.
Add preferences for TPKT and Q.931 reassembly.
svn path=/trunk/; revision=4778
argument, so if the length was supplied as -1, it can set it to the
length of data remaining in the tvbuff, so that its callers can use that
length when getting the value for the field, rather than leaving the
length in the "field_info" structure as -1.
svn path=/trunk/; revision=4752
"data source" has a name and a top-level tvbuff, and frames can have a
list of data sources associated with them.
Use the tvbuff pointer to determine which data source is the data source
for a given field; this means we don't have to worry about multiple data
sources with the same name - the only thing the name does is label the
notebook tab for the display of the data source, and label the hex dump
of the data source in print/Tethereal output.
Clean up a bunch of things discovered in the process of doing the above.
svn path=/trunk/; revision=4749
function that computes the natural logarithm of a double. Using it as
the name of a pointer to a routine to do logging can cause namespace
collisions; in fact, it *does* cause them on AIX. Rename the function
argument to "logfunc".
svn path=/trunk/; revision=4700
typedef for "struct _value_string"; as such, the incomplete structure
declaration in "epan/proto.h" should declare "struct _value_string", not
"struct value_string", and casts and declarations in that header should
also use "struct _value_string", not "struct value_string".
svn path=/trunk/; revision=4699
tvb_length_remaining() except that it throws BoundsError if 'offset'
is out-of-bounds.
Allow a length argument of -1 for FT_STRING and FT_BYTES fields
in proto_tree_add_item().
Change some dissectors to either use -1 for the length argument in
calls to proto_tree_add_item(), or call tvb_ensure_length_remaining()
instead of tvb_length_remaining(), or to check the return-value
of tvb_length_remaining(). Changes to more dissectors are necessary,
but will follow later.
svn path=/trunk/; revision=4656
Guy Harris