tvbuffified heuristic-dissector interface, but have it immediately turn
its arguments into an old-style buffer pointer and offset.
Register the SMB dissector as a heuristic NetBIOS dissector, and have
"dissect_netbios_payload()" just try the heuristics, as it no longer has
to call the SMB dissector explicitly.
svn path=/trunk/; revision=3973
only the NetBIOS payload, and have the NBSS dissector construct tvbuffs
of that sort (i.e., stop at the end of the NBSS session message, not at
the end of the data handed to the NBSS dissector).
svn path=/trunk/; revision=3972
packets.
Make a "dissect_netbios_payload()" routine, called from the
NetBIOS-over-802.2 (NBF), NetBIOS-over-IPX, and NetBIOS-over-TCP
dissectors. Take Todd Sabin's changes to add a heuristic dissector list
to the NBSS dissector, and apply them to "dissect_netbios_payload()"
instead. Make the SMB dissector heuristic, returning FALSE if it
doesn't see 0xFF S M B at the beginning of the packet, and have
"dissect_netbios_payload()" first try the heuristic dissector list, then
try the SMB dissector if no other heuristic dissector claims the packet,
then just dissect the payload as data.
From Todd Sabin: have the DCE/RPC dissector register as a heuristic
dissector for NetBIOS.
svn path=/trunk/; revision=3969
statements.
Move the setting of the Protocol column in the Appletalk ARP and IPX
dissectors before anything is fetched from the packet, and also clear
the Info column at that point in those and some other dissectors, so
that if an exception is thrown, the columns don't reflect the previous
protocol.
Fix the registration of the IPX RIP dissector to use the right protocol
ID.
svn path=/trunk/; revision=2928
type, so "netbios_add_name()" doesn't need to check for it doing so
(yes, the tvbuff stuff *does* catch "get_netbios_name()" running past
the end of the packet, and causes an exception to be thrown). Get rid
of the check, and get rid of "netbios_add_name()"s return value.
In "dissect_nbipx_dg()", always call the SMB dissector if there's data
left in the packet, regardless of whether the "tree" argument is null or
not; subdissectors should always be called, so they can build any
internal state on the first pass through the capture, and so that they
can fill in the Protocol and Info columns.
svn path=/trunk/; revision=2899
"{old_}heur_dissector_add()", "{old_}conv_dissector_add()", and
"register_dissector()", so that an entry in those tables has associated
with it the protocol index of the protocol the dissector handles (or -1,
if there is no protocol index for it).
This is for future use in a number of places.
(Arguably, "proto_register_protocol()" should take a dissector pointer
as an argument, but
1) it'd have to handle both regular and heuristic dissectors;
2) making it take either a "dissector_t" or a union of that and
a "heur_dissector_t" introduces some painful header-file
interdependencies
so I'm punting on that for now. As with other Ethereal internal APIs,
these APIs are subject to change in the future, at least until Ethereal
1.0 comes out....)
svn path=/trunk/; revision=2849
protocols, in addition to adding structures to the list of filterable
fields. Give it an extra argument that specifies a "short name" for the
protocol, for use in such places as
pinfo->current_proto;
the dialog box for constructing filters;
the preferences tab for the protocol;
and so on (although we're not yet using it in all those places).
Make the preference name that appears in the preferences file and the
command line for the DIAMETER protocol "diameter", not "Diameter"; the
convention is that the name in question be all-lower-case.
Make some routines and variables that aren't exported static.
Update a comment in the ICP dissector to make it clear that the
dissector won't see fragments other than the first fragment of a
fragmented datagram.
svn path=/trunk/; revision=2810
can be put, and a pointer to the string for the column, which might or
might not point to that buffer.
Add a routine "col_set_str()", which sets the string for the column to
the string passed to it as an argument; it should only be handed a
static string (a string constant would be ideal). It doesn't do any
copying, so it's faster than "col_add_str()".
Make the routines that append to columns check whether the pointer to
the string for the column points to the buffer for the column and, if
not, copy the string for the column to the buffer for the column so that
you can append to it (so you can use "col_set_str()" and then use
"col_append_str()" or "col_append_fstr()").
Convert a bunch of "col_add_str()" calls that take a string constant as
an argument to "col_set_str()" calls.
Convert some "col_add_fstr()" calls that take a string constant as the
only argument - i.e., the format string doesn't have any "%" slots into
which to put strings for subsequent arguments to "col_set_str()" calls
(those calls are just like "col_add_str()" calls).
Replace an END_OF_FRAME reference in a tvbuffified dissector with a
"tvb_length(tvb)" call.
svn path=/trunk/; revision=2670
hf_netb_remote_ses_no, and hf_netb_data2.
- Change hf_netb_local_ses_no and hf_netb_remote_ses_no from FT_UINT16 to
FT_UINT8.
- Add hf_netb_data2 to hf_netb.
svn path=/trunk/; revision=2626
the following:
It is now possible to enable/disable a particular protocol decoding
(i.e. the protocol dissector is void or not). When a protocol
is disabled, it is displayed as Data and of course, all linked
sub-protocols are disabled as well.
Disabling a protocol could be interesting:
- in case of buggy dissectors
- in case of wrong heuristics
- for performance reasons
- to decode the data as another protocol (TODO)
Currently (if I am not wrong), all dissectors but NFS can be disabled
(and dissectors that do not register protocols :-)
I do not like the way the RPC sub-dissectors are disabled (in the
sub-dissectors) since this could be done in the RPC dissector itself,
knowing the sub-protocol hfinfo entry (this is why, I've not modified
the NFS one yet).
Two functions are added in proto.c :
gboolean proto_is_protocol_enabled(int n);
void proto_set_decoding(int n, gboolean enabled);
and two MACROs which can be used in dissectors:
OLD_CHECK_DISPLAY_AS_DATA(index, pd, offset, fd, tree)
CHECK_DISPLAY_AS_DATA(index, tvb, pinfo, tree)
See also the XXX in proto_dlg.c and proto.c around the new functions.
svn path=/trunk/; revision=2267
dissectors to be registered as dissectors for particular ports,
registered as heuristic dissectors, and registered as dissectors for
conversations, and have routines to be used both by old-style and
new-style dissectors to call registered dissectors.
Have the code that calls those dissectors translate the arguments as
necessary. (For conversation dissectors, replace
"find_conversation_dissector()", which just returns a pointer to the
dissector, with "old_try_conversation_dissector()" and
"try_conversation_dissector()", which actually call the dissector, so
that there's a single place at which we can do that translation. Also
make "dissector_lookup()" static and, instead of calling it and, if it
returns a non-null pointer, calling that dissector, just use
"old_dissector_try_port()" or "dissector_try_port()", for the same
reason.)
This allows some dissectors that took old-style arguments and
immediately translated them to new-style arguments to just take
new-style arguments; make them do so. It also allows some new-style
dissectors not to have to translate arguments before calling routines to
look up and call dissectors; make them not do so.
Get rid of checks for too-short frames in new-style dissectors - the
tvbuff code does those checks for you.
Give the routines to register old-style dissectors, and to call
dissectors from old-style dissectors, names beginning with "old_", with
the routines for new-style dissectors not having the "old_". Update the
dissectors that use those routines appropriately.
Rename "dissect_data()" to "old_dissect_data()", and
"dissect_data_tvb()" to "dissect_data()".
svn path=/trunk/; revision=2218
a particular type, rather than taking a varargs list, along the lines of
the "proto_tree_add_XXX_format()" routines.
Replace most calls to "proto_tree_add_item()" and
"proto_tree_add_item_hidden()" with calls to those routines.
Rename "proto_tree_add_item()" and "proto_tree_add_item_hidden()" to
"proto_tree_add_item_old()" and "proto_tree_add_item_hidden_old()", and
add new "proto_tree_add_item()" and "proto_tree_add_item_hidden()"
routines that don't take the item to be added as an argument - instead,
they fetch the argument from the packet whose tvbuff was handed to them,
from the offset handed to them.
svn path=/trunk/; revision=2031
Add exceptions routines.
Convert proto_tree_add_*() routines to require tvbuff_t* argument.
Convert all dissectors to pass NULL argument ("NullTVB" macro == NULL) as
the tvbuff_t* argument to proto_tree_add_*() routines.
dissect_packet() creates a tvbuff_t, wraps the next dissect call in
a TRY block, will print "Short Frame" on the proto_tree if a BoundsError
exception is caught.
The FDDI dissector is converted to use tvbuff's.
svn path=/trunk/; revision=1939
for protocols that run inside 802.2 LLC register themselves with it
using "dissector_add()".
Make various dissectors static if they can be, and remove from header
files declarations of those dissectors.
svn path=/trunk/; revision=1872
This change allows you to add a new packet-*.c file and not cause a
recompilation of everything that #include's packet.h
Add the plugin_api.[ch] files ot the plugins/Makefile.am packaging list.
Add #define YY_NO_UNPUT 1 to the lex source so that the yyunput symbol
is not defined, squelching a compiler complaint when compiling the generated
C file.
svn path=/trunk/; revision=1637
whether we're building a protocol tree or not.
Make "dissect_eth()" use "BYTES_ARE_IN_FRAME()" to see if we have a full
Ethernet header - it can be called with a non-zero offset, if Ethernet
frames are encapsulated inside other frames (e.g., ATM LANE).
Make capture routines take an "offset" argument if the corresponding
dissect routine takes one (for symmetry, and for Cisco ISL or any other
protocol that encapsulates Ethernet or Token-Ring frames inside other
frames).
Pass the frame lengths to capture routines via the "pi" structure,
rather than as an in-line argument, so that they can macros such as
"BYTES_ARE_IN_FRAME()" the way the corresponding dissect routines do.
Make capture routines update "pi.len" and "pi.captured_len" the same way
the corresponding diseect routines do, if the capture routines then call
other capture routines.
Make "capture_vlan()" count as "other" frames that are too short, the
way other capture routines do.
svn path=/trunk/; revision=1525
of the frame, plus at most one offset from the beginning of the frame,
to make it clearer what the offset is.
Then use that offset in at least some places to do bounds checking.
If a packet has no payload, don't hand it to the SMB dissector.
svn path=/trunk/; revision=1165
dynamically-assigned "ett_" integer values, assigned by
"proto_register_subtree_array()"; this:
obviates the need to update "packet.h" whenever you add a new
subtree type - you only have to add a call to
"proto_register_subtree_array()" to a "register" routine and an
array of pointers to "ett_", if they're not already there, and
add a pointer to the new "ett_" variable to the array, if they
are there;
would allow run-time-loaded dissectors to allocate subtree types
when they're loaded.
svn path=/trunk/; revision=1043
Frame protocol (that being what this dissects).
If you're cutting up something into bitfields, the bitfield dissection
returned by "dissect_bitfield_XXX()" should be the first text on the
line - if not, then if the text items that come before the various
bitfields aren't all the same length, the bits don't line up.
Cope with packets from one of Gilbert's captures, where the sender
"name" in some NBF datagrams isn't a NetBIOS name, it's 10 octets of 0
followed by a MAC address!
The "name type" in the "Data2" field of NBF frames is 0x00 for unique
names and 0x01 for group names, not a "16th character of a NetBIOS name"
name type.
Fix up various other things.
svn path=/trunk/; revision=633
to turn NetBIOS names into a nice printable form.
Put the description of NetBIOS name types into places where it fits;
have "packet-netbios.c" export a routine to interpret them.
svn path=/trunk/; revision=630
That makes the space of name types even more sparse; use "val_to_str()"
to decode them, rather than an indexed table.
Make a "process_netbios_name()" routine that shows non-printable
characters in NetBIOS names as <XX>, where "XX" is the value of the
character in hex (the way Network Monitor does), and have
"get_netbios_name()" use it (NetBIOS-over-TCP will be made to use it in
the future).
When displaying NetBIOS names, include the name type character at the
end, in angle brackets, the way Network Monitor does (show it in hex
even if it *is* printable - 0x20 is 0x20, not "space", in that context).
svn path=/trunk/; revision=628
in the IPX header, and have the dissectors it calls use it rather than
being passed the length as an argument.
Treat both packet type 20 ("WAN Broadcast") and 4 ("IPX", although 3 is
also "IPX", according to Network Monitor) as potentially being NetBIOS
packets.
The packet types for the IPX NetBIOS socket (0x0455) and the NWLink
sockets (0x0551 and 0x0553) are different (perhaps because there's one
socket for the 0x0455 NBIPX, so you have to do name service and datagram
service and have the packet types distinguish them, but NWLink has
separate sockets for name service and datagram service).
The packet type for name service and for datagram service are at
*different locations* in the packet, which is unfortunate if you want to
use the packet type to distinguish name service and datagram service
packets. Use the packet length, for now, to distinguish them, with
socket 0x0455.
Dissect datagram packets differently from name service packets.
Export "packet-netbios.c"'s "netbios_add_name()" routine, and use it
when dissecting NBIPX packets as well.
Label NBIPX packets as "NBIPX" rather than "NetBIOS".
svn path=/trunk/; revision=627
Fixed the default case in the packet-cdp while() statement to look for
non-zero offsets. I should fix the other cases where offset += length.
Meanwhile, however, I added cdp.tlv.type and cdp.tlv.len as two filterable
fields so that one can use "cdp.tlv.len == 0" as a display filter to
find the packet that was causing problems.
svn path=/trunk/; revision=568
Guy Harris