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-rw-r--r--epan/dissectors/packet-sdh.c290
1 files changed, 290 insertions, 0 deletions
diff --git a/epan/dissectors/packet-sdh.c b/epan/dissectors/packet-sdh.c
new file mode 100644
index 00000000..f060d8c5
--- /dev/null
+++ b/epan/dissectors/packet-sdh.c
@@ -0,0 +1,290 @@
+/* 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 = -1;
+
+static gint ett_sdh = -1;
+
+static int hf_sdh_a1 = -1;
+static int hf_sdh_a2 = -1;
+static int hf_sdh_j0 = -1;
+static int hf_sdh_b1 = -1;
+static int hf_sdh_e1 = -1;
+static int hf_sdh_f1 = -1;
+static int hf_sdh_d1 = -1;
+static int hf_sdh_d2 = -1;
+static int hf_sdh_d3 = -1;
+static int hf_sdh_au = -1;
+static int hf_sdh_b2 = -1;
+static int hf_sdh_k1 = -1;
+static int hf_sdh_k2 = -1;
+static int hf_sdh_d4 = -1;
+static int hf_sdh_d5 = -1;
+static int hf_sdh_d6 = -1;
+static int hf_sdh_d7 = -1;
+static int hf_sdh_d8 = -1;
+static int hf_sdh_d9 = -1;
+static int hf_sdh_d10 = -1;
+static int hf_sdh_d11 = -1;
+static int hf_sdh_d12 = -1;
+static int hf_sdh_s1 = -1;
+static int hf_sdh_m1 = -1;
+static int hf_sdh_e2 = -1;
+static int hf_sdh_h1 = -1;
+static int hf_sdh_h2 = -1;
+static int hf_sdh_j1 = -1;
+
+static dissector_handle_t sdh_handle;
+
+static gint 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)
+{
+ guint64 *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);
+
+ guint8 h1;
+ guint8 h2;
+ guint16 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_guint8(tvb, 0*level+(3*level*COLUMNS));
+ h2 = tvb_get_guint8(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 gint *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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