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wireshark/epan/dissectors/packet-cosine.c

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/* packet-cosine.c
* Routines for decoding CoSine IPNOS L2 debug output
*
* Motonori Shindo <motonori@shin.do>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/*
* XXX TODO:
* o PPoATM and PPoFR encapsulation needs more test.
*
*/
#include "config.h"
#include <epan/packet.h>
#include <wiretap/wtap.h>
void proto_register_cosine(void);
void proto_reg_handoff_cosine(void);
static int proto_cosine = -1;
static int hf_pro = -1;
static int hf_off = -1;
static int hf_pri = -1;
static int hf_rm = -1;
static int hf_err = -1;
static int hf_sar = -1;
static int hf_channel_id = -1;
static gint ett_raw = -1;
static dissector_handle_t eth_withoutfcs_handle;
static dissector_handle_t ppp_hdlc_handle;
static dissector_handle_t llc_handle;
static dissector_handle_t chdlc_handle;
static dissector_handle_t fr_handle;
static int
dissect_cosine(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_tree *fh_tree;
proto_item *ti;
union wtap_pseudo_header *pseudo_header = pinfo->pseudo_header;
/* load the top pane info. This should be overwritten by
the next protocol in the stack */
col_set_str(pinfo->cinfo, COL_RES_DL_SRC, "N/A");
col_set_str(pinfo->cinfo, COL_RES_DL_DST, "N/A");
col_set_str(pinfo->cinfo, COL_PROTOCOL, "N/A");
col_set_str(pinfo->cinfo, COL_INFO, "CoSine IPNOS L2 debug output");
/* populate a tree in the second pane with the status of the link
layer (ie none) */
if(tree) {
ti = proto_tree_add_protocol_format(tree, proto_cosine, tvb, 0, 0,
"CoSine IPNOS L2 debug output (%s)",
pseudo_header->cosine.if_name);
fh_tree = proto_item_add_subtree(ti, ett_raw);
proto_tree_add_uint(fh_tree, hf_pro, tvb, 0, 0, pseudo_header->cosine.pro);
proto_tree_add_uint(fh_tree, hf_off, tvb, 0, 0, pseudo_header->cosine.off);
proto_tree_add_uint(fh_tree, hf_pri, tvb, 0, 0, pseudo_header->cosine.pri);
proto_tree_add_uint(fh_tree, hf_rm, tvb, 0, 0, pseudo_header->cosine.rm);
proto_tree_add_uint(fh_tree, hf_err, tvb, 0, 0, pseudo_header->cosine.err);
switch (pseudo_header->cosine.encap) {
case COSINE_ENCAP_ETH:
break;
case COSINE_ENCAP_ATM:
case COSINE_ENCAP_PPoATM:
proto_tree_add_item(fh_tree, hf_sar, tvb, 0, 16, ENC_NA);
break;
case COSINE_ENCAP_PPP:
case COSINE_ENCAP_FR:
case COSINE_ENCAP_PPoFR:
proto_tree_add_item(fh_tree, hf_channel_id, tvb, 0, 4, ENC_NA);
break;
case COSINE_ENCAP_HDLC:
if (pseudo_header->cosine.direction == COSINE_DIR_TX) {
proto_tree_add_item(fh_tree, hf_channel_id, tvb, 0, 2, ENC_NA);
} else if (pseudo_header->cosine.direction == COSINE_DIR_RX) {
proto_tree_add_item(fh_tree, hf_channel_id, tvb, 0, 4, ENC_NA);
}
break;
default:
break;
}
}
switch (pseudo_header->cosine.encap) {
case COSINE_ENCAP_ETH:
call_dissector(eth_withoutfcs_handle, tvb_new_subset_remaining(tvb, 0),
pinfo, tree);
break;
case COSINE_ENCAP_ATM:
case COSINE_ENCAP_PPoATM:
call_dissector(llc_handle, tvb_new_subset_remaining(tvb, 16),
pinfo, tree);
break;
case COSINE_ENCAP_PPP:
call_dissector(ppp_hdlc_handle, tvb_new_subset_remaining(tvb, 4),
pinfo, tree);
break;
case COSINE_ENCAP_HDLC:
if (pseudo_header->cosine.direction == COSINE_DIR_TX) {
call_dissector(chdlc_handle, tvb_new_subset_remaining(tvb, 2),
pinfo, tree);
} else if (pseudo_header->cosine.direction == COSINE_DIR_RX) {
call_dissector(chdlc_handle, tvb_new_subset_remaining(tvb, 4),
pinfo, tree);
}
break;
case COSINE_ENCAP_FR:
case COSINE_ENCAP_PPoFR:
call_dissector(fr_handle, tvb_new_subset_remaining(tvb, 4),
pinfo, tree);
break;
case COSINE_ENCAP_TEST:
case COSINE_ENCAP_UNKNOWN:
call_data_dissector(tvb, pinfo, tree);
break;
default:
break;
}
return tvb_captured_length(tvb);
}
void
proto_register_cosine(void)
{
static hf_register_info hf[] = {
{ &hf_pro,
{ "Protocol", "cosine.pro", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}},
{ &hf_off,
{ "Offset", "cosine.off", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}},
{ &hf_pri,
{ "Priority", "cosine.pri", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}},
{ &hf_rm,
{ "Rate Marking", "cosine.rm", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}},
{ &hf_err,
{ "Error Code", "cosine.err", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}},
{ &hf_sar,
{ "SAR header", "cosine.sar", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL}},
{ &hf_channel_id,
{ "Channel handle ID", "cosine.channel_id", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL}},
};
static gint *ett[] = {
&ett_raw,
};
proto_cosine = proto_register_protocol("CoSine IPNOS L2 debug output",
"CoSine", "cosine");
proto_register_field_array(proto_cosine, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_cosine(void)
{
dissector_handle_t cosine_handle;
/*
* Get handles for dissectors.
*/
eth_withoutfcs_handle = find_dissector_add_dependency("eth_withoutfcs", proto_cosine);
ppp_hdlc_handle = find_dissector_add_dependency("ppp_hdlc", proto_cosine);
llc_handle = find_dissector_add_dependency("llc", proto_cosine);
chdlc_handle = find_dissector_add_dependency("chdlc", proto_cosine);
fr_handle = find_dissector_add_dependency("fr", proto_cosine);
cosine_handle = create_dissector_handle(dissect_cosine, proto_cosine);
dissector_add_uint("wtap_encap", WTAP_ENCAP_COSINE, cosine_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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