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/* packet-sdh.c
* Routines for SDH/SONET encapsulation dissection
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 - 2012 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/prefs.h>
#include <wiretap/wtap.h>
#include "packet-erf.h"
#define COLUMNS 270
#define EXT_HDR_TYPE_RAW_LINK 5
void proto_register_sdh(void);
void proto_reg_handoff_sdh(void);
static int proto_sdh;
static int ett_sdh;
static int hf_sdh_a1;
static int hf_sdh_a2;
static int hf_sdh_j0;
static int hf_sdh_b1;
static int hf_sdh_e1;
static int hf_sdh_f1;
static int hf_sdh_d1;
static int hf_sdh_d2;
static int hf_sdh_d3;
static int hf_sdh_au;
static int hf_sdh_b2;
static int hf_sdh_k1;
static int hf_sdh_k2;
static int hf_sdh_d4;
static int hf_sdh_d5;
static int hf_sdh_d6;
static int hf_sdh_d7;
static int hf_sdh_d8;
static int hf_sdh_d9;
static int hf_sdh_d10;
static int hf_sdh_d11;
static int hf_sdh_d12;
static int hf_sdh_s1;
static int hf_sdh_m1;
static int hf_sdh_e2;
static int hf_sdh_h1;
static int hf_sdh_h2;
static int hf_sdh_j1;
static dissector_handle_t sdh_handle;
static int sdh_data_rate = 1;
static const enum_val_t data_rates[] = {
{"Attempt to guess", "Attempt to guess", -1},
{"OC-3", "OC-3", 1},
{"OC-12", "OC-12", 4},
{"OC-24", "OC-24", 8},
{"OC-48", "OC-48", 16},
{NULL, NULL, -1}
};
static const value_string sdh_s1_vals[] = {
{ 0, "Quality unknown" },
{ 1, "Reserved" },
{ 2, "Rec G.811" },
{ 3, "Reserved" },
{ 4, "SSU-A" },
{ 5, "Reserved" },
{ 6, "Reserved" },
{ 7, "Reserved" },
{ 8, "SSU-B" },
{ 9, "Reserved" },
{ 10, "Reserved" },
{ 11, "SDH Equipment Source" },
{ 12, "Reserved" },
{ 13, "Reserved" },
{ 14, "Reserved" },
{ 15, "do not use for sync" },
{ 0, NULL }
};
static int
get_sdh_level(tvbuff_t *tvb, packet_info *pinfo)
{
uint64_t *hdr = NULL;
/*data rate has been set in the SDH options*/
if(sdh_data_rate != -1) return sdh_data_rate;
/*ERF specifies data rate*/
hdr = erf_get_ehdr(pinfo, EXT_HDR_TYPE_RAW_LINK, NULL);
if (hdr != NULL){
switch((*hdr & 0xff00) >> 8){
case 1: /*OC-3*/
return 1;
case 2: /*OC-12*/
return 4;
case 3: /*OC-48*/
return 16;
default: /*drop through and try the next method*/
;
}
}
/*returns the multiplier for each data level*/
switch(tvb_reported_length(tvb)){
case 2430: /*OC-3*/
return 1;
case 9720: /*OC-12*/
return 4;
case 19440: /*OC-24*/
return 8;
case 38880: /*OC-48*/
return 16;
}
return 1;
}
static int
dissect_sdh(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
col_set_str(pinfo->cinfo, COL_PROTOCOL, "SDH");
col_clear(pinfo->cinfo,COL_INFO);
if (tree) {
proto_tree *sdh_tree;
proto_item *sdh_item;
int level = get_sdh_level(tvb, pinfo);
uint8_t h1;
uint8_t h2;
uint16_t au;
int auoffset;
sdh_item = proto_tree_add_protocol_format(tree, proto_sdh, tvb, 0, -1, "SDH");
sdh_tree = proto_item_add_subtree(sdh_item, ett_sdh);
h1 = tvb_get_uint8(tvb, 0*level+(3*level*COLUMNS));
h2 = tvb_get_uint8(tvb, 3*level+(3*level*COLUMNS));
au = (h2 | ((0x03 & h1) << 8));
proto_tree_add_item(sdh_tree, hf_sdh_a1, tvb, 0*level, 3*level, ENC_NA);
proto_tree_add_item(sdh_tree, hf_sdh_a2, tvb, 3*level, 3*level, ENC_NA);
proto_tree_add_item(sdh_tree, hf_sdh_j0, tvb, 6*level, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_b1, tvb, 0*level+(1*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_e1, tvb, 3*level+(1*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_f1, tvb, 6*level+(1*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d1, tvb, 0*level+(2*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d2, tvb, 3*level+(2*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d3, tvb, 6*level+(2*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_h1, tvb, 0*level+(3*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_h2, tvb, 3*level+(3*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_uint(sdh_tree, hf_sdh_au, tvb, 0*level+(3*level*COLUMNS), 3*level+1, au);
proto_tree_add_item(sdh_tree, hf_sdh_b2, tvb, 0*level+(4*level*COLUMNS), 3*level, ENC_NA);
proto_tree_add_item(sdh_tree, hf_sdh_k1, tvb, 3*level+(4*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_k2, tvb, 6*level+(4*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d4, tvb, 0*level+(5*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d5, tvb, 3*level+(5*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d6, tvb, 6*level+(5*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d7, tvb, 0*level+(6*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d8, tvb, 3*level+(6*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d9, tvb, 6*level+(6*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d10, tvb, 0*level+(7*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d11, tvb, 3*level+(7*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_d12, tvb, 6*level+(7*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_s1, tvb, 0*level+(8*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_m1, tvb, 3*level+2+(8*level*COLUMNS), 1, ENC_BIG_ENDIAN);
proto_tree_add_item(sdh_tree, hf_sdh_e2, tvb, 6*level+(8*level*COLUMNS), 1, ENC_BIG_ENDIAN);
/*XXX: POH that au points to may not be in the same frame. Also wrong on pointer justification*/
/*calculate start of SPE by wrapping AU pointer*/
auoffset = (((9 + 3*COLUMNS) /*start after H3*/ + au*3 + 9*(au/87) /*add extra SOH rows to offset*/) * level) % (COLUMNS*9*level);
proto_tree_add_item(sdh_tree, hf_sdh_j1, tvb, auoffset, 1, ENC_BIG_ENDIAN);
}
return tvb_captured_length(tvb);
}
void
proto_register_sdh(void)
{
static hf_register_info hf[] = {
{ &hf_sdh_a1,
{ "A1", "sdh.a1", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_a2,
{ "A2", "sdh.a2", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_j0,
{ "J0", "sdh.j0", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_b1,
{ "B1", "sdh.b1", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_e1,
{ "E1", "sdh.e1", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_f1,
{ "F1", "sdh.f1", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d1,
{ "D1", "sdh.d1", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d2,
{ "D2", "sdh.d2", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d3,
{ "D3", "sdh.d3", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_au,
{ "AU", "sdh.au", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_b2,
{ "B2", "sdh.b2", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_k1,
{ "K1", "sdh.k1", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_k2,
{ "K2", "sdh.k2", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d4,
{ "D4", "sdh.d4", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d5,
{ "D5", "sdh.d5", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d6,
{ "D6", "sdh.d6", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d7,
{ "D7", "sdh.d7", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d8,
{ "D8", "sdh.d8", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d9,
{ "D9", "sdh.d9", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d10,
{ "D10", "sdh.d10", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d11,
{ "D11", "sdh.d11", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_d12,
{ "D12", "sdh.d12", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_s1,
{ "S1", "sdh.s1", FT_UINT8, BASE_HEX, VALS(sdh_s1_vals), 0x0, NULL, HFILL }},
{ &hf_sdh_m1,
{ "M1", "sdh.m1", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_e2,
{ "E2", "sdh.e2", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_j1,
{ "J1", "sdh.j1", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_h1,
{ "H1", "sdh.h1", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_sdh_h2,
{ "H2", "sdh.h2", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
};
static int *ett[] = {
&ett_sdh,
};
module_t *sdh_module;
proto_sdh = proto_register_protocol("SDH/SONET Protocol", "SDH", "sdh");
proto_register_field_array(proto_sdh, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
sdh_module = prefs_register_protocol(proto_sdh, NULL);
prefs_register_enum_preference(sdh_module, "data.rate",
"Data rate",
"Data rate",
&sdh_data_rate, data_rates, ENC_BIG_ENDIAN);
sdh_handle = register_dissector("sdh", dissect_sdh, proto_sdh);
}
void
proto_reg_handoff_sdh(void)
{
dissector_add_uint("wtap_encap", WTAP_ENCAP_SDH, sdh_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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