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wireshark/epan/dissectors/packet-tte-pcf.c

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/* packet-tte-pcf.c
* Routines for Time Triggered Ethernet Protocol Control Frame dissection
*
* Author: Valentin Ecker
* Author: Benjamin Roch, benjamin.roch (AT) tttech.com
*
* TTTech Computertechnik AG, Austria.
* https://www.tttech.com/technologies/time-triggered-ethernet/
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/etypes.h>
#include "packet-tte.h"
void proto_register_tte_pcf(void);
void proto_reg_handoff_tte_pcf(void);
/* Initialize the protocol and registered fields */
static int proto_tte_pcf = -1;
static int hf_tte_pcf_ic = -1;
static int hf_tte_pcf_mn = -1;
/* static int hf_tte_pcf_res0 = -1; */
static int hf_tte_pcf_sp = -1;
static int hf_tte_pcf_sd = -1;
static int hf_tte_pcf_type = -1;
/* static int hf_tte_pcf_res1 = -1; */
static int hf_tte_pcf_tc = -1;
/* Initialize the subtree pointers */
static gint ett_tte_pcf = -1;
static dissector_handle_t tte_pcf_handle;
static const value_string pcf_type_str_vals[] =
{ {2, "integration frame"}
, {4, "coldstart frame"}
, {8, "coldstart ack frame"}
, {0, NULL}
};
/* Code to actually dissect the packets */
static int
dissect_tte_pcf(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
/* Set up structures needed to add the protocol subtree and manage it */
proto_item *tte_pcf_root_item;
proto_tree *tte_pcf_tree;
/* variables used to store the fields displayed in the info_column */
guint8 sync_priority = 0;
guint8 sync_domain = 0;
/* Check that there's enough data */
if (tvb_reported_length(tvb) < TTE_PCF_LENGTH )
{
return 0;
}
/* get sync_priority and sync_domain */
sync_priority = tvb_get_guint8(tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
TTE_PCF_RES0_LENGTH);
sync_domain = tvb_get_guint8(tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
TTE_PCF_RES0_LENGTH+TTE_PCF_SP_LENGTH);
/* Make entries in Protocol column and Info column on summary display */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "PCF");
col_add_fstr(pinfo->cinfo, COL_INFO,
"Sync Domain: 0x%02X Sync Priority: 0x%02X",
sync_domain, sync_priority);
if (tree) {
/* create display subtree for the protocol */
tte_pcf_root_item = proto_tree_add_item(tree, proto_tte_pcf, tvb, 0,
TTE_PCF_LENGTH, ENC_NA);
tte_pcf_tree = proto_item_add_subtree(tte_pcf_root_item, ett_tte_pcf);
proto_tree_add_item(tte_pcf_tree,
hf_tte_pcf_ic, tvb, 0, TTE_PCF_IC_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(tte_pcf_tree,
hf_tte_pcf_mn, tvb, TTE_PCF_IC_LENGTH, TTE_PCF_MN_LENGTH, ENC_BIG_ENDIAN);
/* RESERVED FIELD --- will not be displayed */
/* proto_tree_add_item(tte_pcf_tree,
hf_tte_pcf_res0, tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH,
TTE_PCF_RES0_LENGTH, ENC_BIG_ENDIAN); */
proto_tree_add_item(tte_pcf_tree,
hf_tte_pcf_sp, tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
TTE_PCF_RES0_LENGTH, TTE_PCF_SP_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(tte_pcf_tree,
hf_tte_pcf_sd, tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
TTE_PCF_RES0_LENGTH+TTE_PCF_SP_LENGTH, TTE_PCF_SD_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(tte_pcf_tree,
hf_tte_pcf_type, tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
TTE_PCF_RES0_LENGTH+TTE_PCF_SP_LENGTH+TTE_PCF_SD_LENGTH,
TTE_PCF_TYPE_LENGTH, ENC_BIG_ENDIAN);
/* RESERVED FIELD --- will not be displayed */
/* proto_tree_add_item(tte_pcf_tree,
hf_tte_pcf_res1, tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
TTE_PCF_RES0_LENGTH+TTE_PCF_SP_LENGTH+TTE_PCF_SD_LENGTH+
TTE_PCF_TYPE_LENGTH, TTE_PCF_RES1_LENGTH, ENC_NA); */
proto_tree_add_item(tte_pcf_tree,
hf_tte_pcf_tc, tvb, TTE_PCF_IC_LENGTH+TTE_PCF_MN_LENGTH+
TTE_PCF_RES0_LENGTH+TTE_PCF_SP_LENGTH+TTE_PCF_SD_LENGTH+
TTE_PCF_TYPE_LENGTH+TTE_PCF_RES1_LENGTH, TTE_PCF_TC_LENGTH, ENC_BIG_ENDIAN);
}
return tvb_captured_length(tvb);
}
void
proto_register_tte_pcf(void)
{
static hf_register_info hf[] = {
{ &hf_tte_pcf_ic,
{ "Integration Cycle", "tte_pcf.ic",
FT_UINT32, BASE_HEX, NULL, 0x0,
NULL, HFILL }
},
{ &hf_tte_pcf_mn,
{ "Membership New", "tte_pcf.mn",
FT_UINT32, BASE_HEX, NULL, 0x0,
NULL, HFILL }
},
#if 0
{ &hf_tte_pcf_res0,
{ "Reserved 0", "tte_pcf.res0",
FT_UINT32, BASE_HEX, NULL, 0x0,
NULL, HFILL }
},
#endif
{ &hf_tte_pcf_sp,
{ "Sync Priority", "tte_pcf.sp",
FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL }
},
{ &hf_tte_pcf_sd,
{ "Sync Domain", "tte_pcf.sd",
FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL }
},
{ &hf_tte_pcf_type,
{ "Type", "tte_pcf.type",
FT_UINT8, BASE_HEX, VALS(pcf_type_str_vals), 0x0F,
NULL, HFILL }
},
#if 0
{ &hf_tte_pcf_res1,
{ "Reserved 1", "tte_pcf.res1",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }
},
#endif
{ &hf_tte_pcf_tc,
{ "Transparent Clock", "tte_pcf.tc",
FT_UINT64, BASE_HEX, NULL, 0x0,
NULL, HFILL }
}
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_tte_pcf
};
/* Register the protocol name and description */
proto_tte_pcf = proto_register_protocol("TTEthernet Protocol Control Frame",
"TTE PCF", "tte_pcf");
/* Required function calls to register header fields and subtrees used */
proto_register_field_array(proto_tte_pcf, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
tte_pcf_handle = register_dissector("tte_pcf", dissect_tte_pcf, proto_tte_pcf);
}
void
proto_reg_handoff_tte_pcf(void)
{
dissector_add_uint("ethertype", ETHERTYPE_TTE_PCF, tte_pcf_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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