2 * conv_id 2011 Robert Bullen
4 * Wireshark - Network traffic analyzer
5 * By Gerald Combs <gerald@wireshark.org>
6 * Copyright 1998 Gerald Combs
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version 2
11 * of the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
26 /** conv_id_t is a type that can aid in conversation identification. When
27 * included in a "conversation key", whatever that may be, in addition to the
28 * typical { address, port, address, port } quadruple, it helps differentiate
29 * in case the quadruple is not sufficiently unique. For example, it is not
30 * uncommon to see a TCP quadruple reused these days, and employing a
31 * conv_id_t field ensures that each instance of a reused TCP conversation is
32 * tracked independently. Currently this type is used in both Wireshark's and
33 * tshark's conversation tables implementations (they are different, hence
34 * the need for a whole header file for this one silly type alias).
36 * The "protocol" or "statistic" code responsible for instantiating the
37 * "conversation key" is also responsible for assigning its conv_id_t, and
38 * therefore its interpretation is specific to its assignor. For example, the
39 * TCP conversations tables in Wireshark and tshark assign the value of
40 * tcp.stream. If a conv_id_t field is not used, it should be assigned the
41 * value CONV_ID_UNSET.
43 typedef guint32 conv_id_t;
44 #define CONV_ID_UNSET G_MAXUINT32
46 #endif /* __CONV_ID_H__ */