Hi, Even though I'm not into the details, if you want to have 20 bytes straight up use FT_BYTES as type. This has an arbitrary length.
Thanx, Jaap On Fri, 19 Jan 2007, Jan Kokott wrote: > Hi, > > I found the problem. > The second Subtree has a length of 20 byte. > And that doesn??t work with FT_NONE or FT_UNIT64. > As it seems I have to declare a struct which will be used in the > hf_register_info hf[] to replace the FT_ variable. > > Regards > Jan > > > -------- Original-Nachricht -------- > Datum: Fri, 19 Jan 2007 11:12:49 +0100 > Von: "Jan Kokott" <[EMAIL PROTECTED]> > An: Developer support list for Wireshark <[email protected]> > Betreff: [Wireshark-dev] Beginners help. How to add additional subtrees ? > > > Hi, > > > > My 802.15.4 plugin starts working, but as a newbie to C it??s still quite > > difficult to deal with the idea of pointer. :( > > For starting the plugin I just reused the rudp plugin, so at the moment I > > implemented the Frame Control field and Addressing field of Zigbee under > > UDP at an virtual udp port. > > > > I wanted to add 2 sub_tree and a single item to my dissector, but it > > doesn??t add the second subtree (adressing field). > > the first one is displayed correctly and the "Sequence Number Field" added > > after the first sub_tree also works. > > > > /*I defined all the fields with*/ > > static int hf_zigbee_frame = -1; ...and so on. > > > > /*Then added all three fields*/ > > static gint ett_zigbee = -1; > > > > static gint ett_zigbee_frame = -1; > > static gint ett_zigbee_adr = -1; > > > > tvbuff_t * next_tvb = NULL; > > proto_tree *zigbee_tree = NULL, *frame_tree, *adr_tree; > > proto_item *ti = NULL; > > > > /*Tree*/ > > ti = proto_tree_add_item(tree, proto_zigbee, tvb, 0, hlen, FALSE); > > zigbee_tree = proto_item_add_subtree(ti, ett_zigbee); > > > > /*1.sub_tree*/ > > ti = proto_tree_add_item(zigbee_tree, hf_zigbee_frame, tvb, 0, 2, FALSE); > > frame_tree = proto_item_add_subtree(ti, ett_zigbee_frame); > > /*(filled with for ())*/ > > > > /*Then added the single field without any subtree*/ > > proto_tree_add_item(zigbee_tree, hf_zigbee_seq, tvb, 2, 1, FALSE); > > > > /*And then just added the next subtree*/ > > ti = proto_tree_add_item(zigbee_tree, hf_zigbee_adr, tvb, 3, hlen, FALSE); > > adr_tree = proto_item_add_subtree(ti, ett_zigbee_adr); > > /*(again another for() to fill in the fields)*/ > > > > > > */Defined all the field info in proto_register_zigbee(void)*/ > > > > /*Added the field array*/ > > static gint *ett[] = { > > &ett_zigbee, > > &ett_zigbee_frame, > > &ett_zigbee_adr,}; > > > > /*And registered them */ > > proto_register_field_array(proto_zigbee, hf, array_length(hf)); > > proto_register_subtree_array(ett, array_length(ett)); > > > > That isn??t the full code but should be the interesting part for the > > subtree. > > Why does the first sub_tree work and the second is just displayed as a > > single Item with 20 bytes length ? > > > > I think my problem is with the registration of the second sub_tree or with > > the pointer on ti or the tree. > > > > Regards > > Jan > > _______________________________________________ > > Wireshark-dev mailing list > > [email protected] > > http://www.wireshark.org/mailman/listinfo/wireshark-dev > _______________________________________________ > Wireshark-dev mailing list > [email protected] > http://www.wireshark.org/mailman/listinfo/wireshark-dev > >
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