Adding upstream version 4.2.2.upstream/4.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 365 insertions, 0 deletions

diff --git a/epan/dissectors/packet-sccpmg.c b/epan/dissectors/packet-sccpmg.c
new file mode 100644
index 0000000..a37115e
--- /dev/null
+++ b/epan/dissectors/packet-sccpmg.c
@@ -0,0 +1,365 @@
+/* packet-sccpmg.c
+ * Routines for Signalling Connection Control Part (SCCP) Management dissection
+ *
+ * It is hopefully compliant to:
+ *   ANSI T1.112.3-1996
+ *   ITU-T Q.713 7/1996
+ *   YDN 038-1997 (Chinese ITU variant)
+ *   JT-Q714 and NTT-Q714 (Japan)
+ *
+ *   Note that NTT Annex E (SCCP Management Procedure (Global Title Status
+ *   Management)) is not implemented (yet)
+ *
+ * Copyright 2002, Jeff Morriss <jeff.morriss.ws [AT] gmail.com>
+ *
+ * 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/expert.h>
+#include "packet-mtp3.h"
+
+#define SCCPMG_SSN 1
+
+#define SCCPMG_MESSAGE_TYPE_SSA 0x01
+#define SCCPMG_MESSAGE_TYPE_SSP 0x02
+#define SCCPMG_MESSAGE_TYPE_SST 0x03
+#define SCCPMG_MESSAGE_TYPE_SOR 0x04
+#define SCCPMG_MESSAGE_TYPE_SOG 0x05
+/* SSC is ITU only */
+#define SCCPMG_MESSAGE_TYPE_SSC 0x06
+/* Below are ANSI only */
+#define SCCPMG_MESSAGE_TYPE_SBR 0xfd
+#define SCCPMG_MESSAGE_TYPE_SNR 0xfe
+#define SCCPMG_MESSAGE_TYPE_SRT 0xff
+
+void proto_register_sccpmg(void);
+void proto_reg_handoff_sccpmg(void);
+
+static dissector_handle_t sccpmg_handle;
+
+/* Same as below but with names typed out */
+static const value_string sccpmg_message_type_values[] = {
+	{ SCCPMG_MESSAGE_TYPE_SSA,   "SubSystem Allowed" },
+	{ SCCPMG_MESSAGE_TYPE_SSP,   "SubSystem Prohibited" },
+	{ SCCPMG_MESSAGE_TYPE_SST,   "Subsystem Status Test" },
+	{ SCCPMG_MESSAGE_TYPE_SOR,   "Subsystem Out of service Request" },
+	{ SCCPMG_MESSAGE_TYPE_SOG,   "Subsystem Out of service Grant" },
+	{ SCCPMG_MESSAGE_TYPE_SSC,   "SubSystem Congested (ITU)" },
+	{ SCCPMG_MESSAGE_TYPE_SBR,   "Subsystem Backup Routing (ANSI)" },
+	{ SCCPMG_MESSAGE_TYPE_SNR,   "Subsystem Normal Routing (ANSI)" },
+	{ SCCPMG_MESSAGE_TYPE_SRT,   "Subsystem Routing status Test (ANSI)" },
+	{ 0,                       NULL } };
+
+/* Same as above but in acronym for (for the Info column) */
+static const value_string sccpmg_message_type_acro_values[] = {
+	{ SCCPMG_MESSAGE_TYPE_SSA,   "SSA" },
+	{ SCCPMG_MESSAGE_TYPE_SSP,   "SSP" },
+	{ SCCPMG_MESSAGE_TYPE_SST,   "SST" },
+	{ SCCPMG_MESSAGE_TYPE_SOR,   "SOR" },
+	{ SCCPMG_MESSAGE_TYPE_SOG,   "SOG" },
+	{ SCCPMG_MESSAGE_TYPE_SSC,   "SSC" },
+	{ SCCPMG_MESSAGE_TYPE_SBR,   "SBR" },
+	{ SCCPMG_MESSAGE_TYPE_SNR,   "SNR" },
+	{ SCCPMG_MESSAGE_TYPE_SRT,   "SRT" },
+	{ 0,                       NULL } };
+
+
+#define SCCPMG_MESSAGE_TYPE_OFFSET 0
+#define SCCPMG_MESSAGE_TYPE_LENGTH 1
+
+#define SCCPMG_AFFECTED_SSN_OFFSET SCCPMG_MESSAGE_TYPE_LENGTH
+#define SCCPMG_AFFECTED_SSN_LENGTH 1
+
+#define SCCPMG_AFFECTED_PC_OFFSET (SCCPMG_AFFECTED_SSN_OFFSET + SCCPMG_AFFECTED_SSN_LENGTH)
+#define ITU_SCCPMG_AFFECTED_PC_LENGTH 2
+#define ANSI_SCCPMG_AFFECTED_PC_LENGTH 3
+
+#define ITU_SCCPMG_SMI_OFFSET (SCCPMG_AFFECTED_PC_OFFSET + ITU_SCCPMG_AFFECTED_PC_LENGTH)
+#define ANSI_SCCPMG_SMI_OFFSET (SCCPMG_AFFECTED_PC_OFFSET + ANSI_SCCPMG_AFFECTED_PC_LENGTH)
+#define SCCPMG_SMI_LENGTH 1
+#define SCCPMG_SMI_MASK 0x3
+
+#define ITU_SCCPMG_CONGESTION_OFFSET (ITU_SCCPMG_SMI_OFFSET + SCCPMG_SMI_LENGTH)
+#define ITU_SCCPMG_CONGESTION_LENGTH 1
+#define ITU_SCCPMG_CONGESTION_MASK 0x0f
+#define CHINESE_ITU_SCCPMG_CONGESTION_OFFSET (ANSI_SCCPMG_SMI_OFFSET + SCCPMG_SMI_LENGTH)
+
+#define SCCPMG_SSN_LENGTH    1
+
+/* Initialize the protocol and registered fields */
+static int proto_sccpmg = -1;
+static int hf_sccpmg_message_type = -1;
+static int hf_sccpmg_affected_ssn = -1;
+static int hf_sccpmg_affected_itu_pc = -1;
+static int hf_sccpmg_affected_japan_pc = -1;
+static int hf_sccpmg_affected_ansi_pc = -1;
+static int hf_sccpmg_affected_chinese_pc = -1;
+static int hf_sccpmg_affected_pc_member = -1;
+static int hf_sccpmg_affected_pc_cluster = -1;
+static int hf_sccpmg_affected_pc_network = -1;
+static int hf_sccpmg_smi = -1;
+static int hf_sccpmg_congestion_level = -1;
+
+/* Initialize the subtree pointers */
+static gint ett_sccpmg = -1;
+static gint ett_sccpmg_affected_pc = -1;
+
+static expert_field ei_sccpmg_unknown_msg = EI_INIT;
+
+static void
+dissect_sccpmg_affected_ssn(tvbuff_t *tvb, proto_tree *sccpmg_tree)
+{
+	proto_tree_add_item(sccpmg_tree, hf_sccpmg_affected_ssn, tvb,
+			    SCCPMG_AFFECTED_SSN_OFFSET, SCCPMG_SSN_LENGTH,
+			    ENC_BIG_ENDIAN);
+}
+
+static void
+dissect_sccpmg_affected_pc(tvbuff_t *tvb, proto_tree *sccpmg_tree)
+{
+	guint8 offset = SCCPMG_AFFECTED_PC_OFFSET;
+
+	if (mtp3_standard == ITU_STANDARD) {
+		proto_tree_add_item(sccpmg_tree, hf_sccpmg_affected_itu_pc, tvb,
+				    offset, ITU_PC_LENGTH, ENC_LITTLE_ENDIAN);
+	} else if (mtp3_standard == JAPAN_STANDARD) {
+		proto_tree_add_item(sccpmg_tree, hf_sccpmg_affected_japan_pc,
+				    tvb, offset, JAPAN_PC_LENGTH, ENC_LITTLE_ENDIAN);
+	} else /* ANSI_STANDARD and CHINESE_ITU_STANDARD */ {
+		int *hf_affected_pc;
+
+		if (mtp3_standard == ANSI_STANDARD)
+		{
+			hf_affected_pc = &hf_sccpmg_affected_ansi_pc;
+		} else /* CHINESE_ITU_STANDARD */ {
+			hf_affected_pc = &hf_sccpmg_affected_chinese_pc;
+		}
+
+		/* create and fill the PC tree */
+		dissect_mtp3_3byte_pc(tvb, offset, sccpmg_tree,
+				      ett_sccpmg_affected_pc, *hf_affected_pc,
+				      hf_sccpmg_affected_pc_network,
+				      hf_sccpmg_affected_pc_cluster,
+				      hf_sccpmg_affected_pc_member, 0, 0);
+
+	}
+}
+
+static void
+dissect_sccpmg_smi(tvbuff_t *tvb, proto_tree *sccpmg_tree)
+{
+	guint8 offset = 0;
+
+	if (mtp3_standard == ITU_STANDARD || mtp3_standard == JAPAN_STANDARD)
+		offset = ITU_SCCPMG_SMI_OFFSET;
+	else /* ANSI_STANDARD and CHINESE_ITU_STANDARD */
+		offset = ANSI_SCCPMG_SMI_OFFSET;
+
+	proto_tree_add_item(sccpmg_tree, hf_sccpmg_smi, tvb, offset,
+			    SCCPMG_SMI_LENGTH, ENC_BIG_ENDIAN);
+}
+
+static void
+dissect_sccpmg_congestion_level(tvbuff_t *tvb, proto_tree *sccpmg_tree)
+{
+	guint8 offset = 0;
+
+	if (mtp3_standard == CHINESE_ITU_STANDARD)
+		offset = CHINESE_ITU_SCCPMG_CONGESTION_OFFSET;
+	else /* ITU_STANDARD or JAPAN_STANDARD */
+		offset = ITU_SCCPMG_CONGESTION_OFFSET;
+
+	proto_tree_add_item(sccpmg_tree, hf_sccpmg_congestion_level, tvb,
+			    offset, ITU_SCCPMG_CONGESTION_LENGTH, ENC_BIG_ENDIAN);
+}
+
+static void
+dissect_sccpmg_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccpmg_tree)
+{
+	guint8 message_type;
+
+	/* Extract the message type;  all other processing is based on this */
+	message_type   = tvb_get_guint8(tvb, SCCPMG_MESSAGE_TYPE_OFFSET);
+
+	col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(message_type, sccpmg_message_type_acro_values, "Unknown"));
+
+	if (sccpmg_tree) {
+		/* add the message type to the protocol tree */
+		proto_tree_add_uint(sccpmg_tree, hf_sccpmg_message_type, tvb,
+				    SCCPMG_MESSAGE_TYPE_OFFSET,
+				    SCCPMG_MESSAGE_TYPE_LENGTH, message_type);
+	}
+
+	switch(message_type) {
+	case SCCPMG_MESSAGE_TYPE_SBR:
+	case SCCPMG_MESSAGE_TYPE_SNR:
+	case SCCPMG_MESSAGE_TYPE_SRT:
+		if (mtp3_standard != ANSI_STANDARD)
+		{
+			proto_tree_add_expert(sccpmg_tree, pinfo, &ei_sccpmg_unknown_msg, tvb, 0, -1);
+			break;
+		}
+		/* else fallthrough */
+	case SCCPMG_MESSAGE_TYPE_SSA:
+	case SCCPMG_MESSAGE_TYPE_SSP:
+	case SCCPMG_MESSAGE_TYPE_SST:
+	case SCCPMG_MESSAGE_TYPE_SOR:
+	case SCCPMG_MESSAGE_TYPE_SOG:
+		dissect_sccpmg_affected_ssn(tvb, sccpmg_tree);
+		dissect_sccpmg_affected_pc(tvb, sccpmg_tree);
+		dissect_sccpmg_smi(tvb, sccpmg_tree);
+
+		break;
+	case SCCPMG_MESSAGE_TYPE_SSC:
+		if (mtp3_standard != ANSI_STANDARD)
+		{
+			dissect_sccpmg_affected_ssn(tvb, sccpmg_tree);
+			dissect_sccpmg_affected_pc(tvb, sccpmg_tree);
+			dissect_sccpmg_smi(tvb, sccpmg_tree);
+			dissect_sccpmg_congestion_level(tvb, sccpmg_tree);
+		}
+		/* else fallthrough */
+
+	default:
+		proto_tree_add_expert(sccpmg_tree, pinfo, &ei_sccpmg_unknown_msg, tvb, 0, -1);
+	}
+}
+
+static int
+dissect_sccpmg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
+{
+	proto_item *sccpmg_item;
+	proto_tree *sccpmg_tree = NULL;
+
+	/* Make entry in the Protocol column on summary display */
+	switch(mtp3_standard) {
+	case ITU_STANDARD:
+		col_set_str(pinfo->cinfo, COL_PROTOCOL, "SCCPMG (Int. ITU)");
+		break;
+	case ANSI_STANDARD:
+		col_set_str(pinfo->cinfo, COL_PROTOCOL, "SCCPMG (ANSI)");
+		break;
+	case CHINESE_ITU_STANDARD:
+		col_set_str(pinfo->cinfo, COL_PROTOCOL, "SCCPMG (Chin. ITU)");
+		break;
+	};
+
+	/* In the interest of speed, if "tree" is NULL, don't do any work not
+	   necessary to generate protocol tree items. */
+	if (tree) {
+		/* create the sccpmg protocol tree */
+		sccpmg_item = proto_tree_add_item(tree, proto_sccpmg, tvb, 0,
+						  -1, ENC_NA);
+		sccpmg_tree = proto_item_add_subtree(sccpmg_item, ett_sccpmg);
+	}
+
+	/* dissect the message */
+	dissect_sccpmg_message(tvb, pinfo, sccpmg_tree);
+	return tvb_captured_length(tvb);
+}
+
+/* Register the protocol with Wireshark */
+void
+proto_register_sccpmg(void)
+{
+	/* Setup list of header fields */
+	static hf_register_info hf[] = {
+	  { &hf_sccpmg_message_type,
+	    { "Message Type", "sccpmg.message_type",
+	      FT_UINT8, BASE_HEX, VALS(sccpmg_message_type_values), 0x0,
+	      NULL, HFILL}},
+	  { &hf_sccpmg_affected_ssn,
+	    { "Affected SubSystem Number", "sccpmg.ssn",
+	      FT_UINT8, BASE_DEC, NULL, 0x0,
+	      NULL, HFILL}},
+	  { &hf_sccpmg_affected_itu_pc,
+	    { "Affected Point Code", "sccpmg.pc",
+	      FT_UINT16, BASE_DEC, NULL, ITU_PC_MASK,
+	      NULL, HFILL}},
+	  { &hf_sccpmg_affected_japan_pc,
+	    { "Affected Point Code", "sccpmg.pc",
+	      FT_UINT16, BASE_DEC, NULL, 0x0,
+	      NULL, HFILL}},
+	  { &hf_sccpmg_affected_ansi_pc,
+	    { "Affected Point Code", "sccpmg.ansi_pc",
+	      FT_STRING, BASE_NONE, NULL, 0x0,
+	      NULL, HFILL}},
+	  { &hf_sccpmg_affected_chinese_pc,
+	    { "Affected Point Code", "sccpmg.chinese_pc",
+	      FT_STRING, BASE_NONE, NULL, 0x0,
+	      NULL, HFILL}},
+	  { &hf_sccpmg_affected_pc_network,
+	    { "Affected PC Network", "sccpmg.network",
+	      FT_UINT24, BASE_DEC, NULL, ANSI_NETWORK_MASK,
+	      NULL, HFILL}},
+	  { &hf_sccpmg_affected_pc_cluster,
+	    { "Affected PC Cluster", "sccpmg.cluster",
+	      FT_UINT24, BASE_DEC, NULL, ANSI_CLUSTER_MASK,
+	      NULL, HFILL}},
+	  { &hf_sccpmg_affected_pc_member,
+	    { "Affected PC Member", "sccpmg.member",
+	      FT_UINT24, BASE_DEC, NULL, ANSI_MEMBER_MASK,
+	      NULL, HFILL}},
+	  { &hf_sccpmg_smi,
+	    { "Subsystem Multiplicity Indicator", "sccpmg.smi",
+	      FT_UINT8, BASE_DEC, NULL, SCCPMG_SMI_MASK,
+	      NULL, HFILL}},
+	  { &hf_sccpmg_congestion_level,
+	    { "SCCP Congestion Level (ITU)", "sccpmg.congestion",
+	      FT_UINT8, BASE_DEC, NULL, ITU_SCCPMG_CONGESTION_MASK,
+	      NULL, HFILL}}
+	};
+
+	/* Setup protocol subtree array */
+	static gint *ett[] = {
+		&ett_sccpmg,
+		&ett_sccpmg_affected_pc
+	};
+
+	static ei_register_info ei[] = {
+		{ &ei_sccpmg_unknown_msg, { "sccpmg.unknown_msg", PI_UNDECODED, PI_WARN, "Unknown message", EXPFILL }},
+	};
+
+	expert_module_t* expert_sccpmg;
+
+	/* Register the protocol name and description */
+	proto_sccpmg = proto_register_protocol("Signalling Connection Control Part Management",
+					       "SCCPMG", "sccpmg");
+
+	/* Required function calls to register the header fields and subtrees
+	   used */
+	proto_register_field_array(proto_sccpmg, hf, array_length(hf));
+	proto_register_subtree_array(ett, array_length(ett));
+	expert_sccpmg = expert_register_protocol(proto_sccpmg);
+	expert_register_field_array(expert_sccpmg, ei, array_length(ei));
+
+	/* Register the dissector handle */
+	sccpmg_handle = register_dissector("sccpmg", dissect_sccpmg, proto_sccpmg);
+}
+
+void
+proto_reg_handoff_sccpmg(void)
+{
+	/* Register for SCCP SSN=1 messages */
+	dissector_add_uint("sccp.ssn", SCCPMG_SSN, sccpmg_handle);
+}
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 8
+ * tab-width: 8
+ * indent-tabs-mode: t
+ * End:
+ *
+ * vi: set shiftwidth=8 tabstop=8 noexpandtab:
+ * :indentSize=8:tabSize=8:noTabs=false:
+ */