forked from osmocom/wireshark
36 lines
1.4 KiB
C
36 lines
1.4 KiB
C
/** @file
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*
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* conv_id 2011 Robert Bullen
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef __CONV_ID_H__
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#define __CONV_ID_H__
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/** conv_id_t is a type that can aid in conversation identification. When
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* included in a "conversation key", whatever that may be, in addition to the
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* typical { address, port, address, port } quadruple, it helps differentiate
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* in case the quadruple is not sufficiently unique. For example, it is not
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* uncommon to see a TCP quadruple reused these days, and employing a
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* conv_id_t field ensures that each instance of a reused TCP conversation is
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* tracked independently. Currently this type is used in both Wireshark's and
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* tshark's conversation tables implementations (they are different, hence
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* the need for a whole header file for this one silly type alias).
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*
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* The "protocol" or "statistic" code responsible for instantiating the
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* "conversation key" is also responsible for assigning its conv_id_t, and
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* therefore its interpretation is specific to its assignor. For example, the
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* TCP conversations tables in Wireshark and tshark assign the value of
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* tcp.stream. If a conv_id_t field is not used, it should be assigned the
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* value CONV_ID_UNSET.
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*/
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typedef guint32 conv_id_t;
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#define CONV_ID_UNSET G_MAXUINT32
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#endif /* __CONV_ID_H__ */
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