Adding upstream version 4.2.2.upstream/4.2.2

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

1 files changed, 611 insertions, 0 deletions

diff --git a/epan/dissectors/packet-cisco-sm.c b/epan/dissectors/packet-cisco-sm.c
new file mode 100644
index 00000000..cda29697
--- /dev/null
+++ b/epan/dissectors/packet-cisco-sm.c
@@ -0,0 +1,611 @@
+/* packet-sm.c
+ * Routines for Cisco Session Management Protocol dissection
+ * Copyright 2004, Duncan Sargeant <dunc-ethereal@rcpt.to>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+/*
+ * This is basically a glue dissector for the Cisco SM protocol.  It sits
+ * between the RUDP and MTP3 layers between SLTs and MGCs.
+ *
+ * A link to an overview of the technology :
+ * http://www.cisco.com/en/US/products/sw/netmgtsw/ps4883/products_installation_and_configuration_guide_chapter09186a008010950a.html
+ * Link showing debugs of the protocol:
+ * http://www.cisco.com/univercd/cc/td/doc/product/access/sc/rel7/omts/omts_apb.htm#30052
+ * Scroll down to Backhaul Debug Event/Cause/Reason Codes:
+ * http://www.cisco.com/en/US/docs/ios-xml/ios/debug/command/s1/db-s2.html#GUID-83B6671D-B86F-4B41-819C-85D14F4AACAE
+ * Free/Opensource implementation:
+ * http://yate.null.ro/websvn/filedetails.php?repname=yate&path=%2Ftrunk%2Fmodules%2Fserver%2Fciscosm.cpp
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+
+#define MESSAGE_TYPE_START              0
+#define MESSAGE_TYPE_STOP               1
+#define MESSAGE_TYPE_ACTIVE             2
+#define MESSAGE_TYPE_STANDBY            3
+#define MESSAGE_TYPE_Q_HOLD_INVOKE      4
+#define MESSAGE_TYPE_Q_HOLD_RESPONSE    5
+#define MESSAGE_TYPE_Q_RESUME_INVOKE    6
+#define MESSAGE_TYPE_Q_RESUME_RESPONSE  7
+#define MESSAGE_TYPE_Q_RESET_INVOKE     8
+#define MESSAGE_TYPE_Q_RESET_RESPONSE   9
+#define MESSAGE_TYPE_PDU                0x8000
+
+void proto_register_sm(void);
+void proto_reg_handoff_sm(void);
+
+static const value_string sm_message_type_value[] = {
+    { MESSAGE_TYPE_START,             "Start Message" },
+    { MESSAGE_TYPE_STOP,              "Stop Message" },
+    { MESSAGE_TYPE_ACTIVE,            "Active Message" },
+    { MESSAGE_TYPE_STANDBY,           "Standby Message" },
+    { MESSAGE_TYPE_Q_HOLD_INVOKE,     "Q_HOLD Invoke Message" },
+    { MESSAGE_TYPE_Q_HOLD_RESPONSE,   "Q_HOLD Response Message" },
+    { MESSAGE_TYPE_Q_RESUME_INVOKE,   "Q_RESUME Invoke Message" },
+    { MESSAGE_TYPE_Q_RESUME_RESPONSE, "Q_RESUME Response Message" },
+    { MESSAGE_TYPE_Q_RESET_INVOKE,    "Q_RESET Invoke Message" },
+    { MESSAGE_TYPE_Q_RESET_RESPONSE,  "Q_RESET Response Message" },
+    { MESSAGE_TYPE_PDU,               "PDU Message" },
+    { 0, NULL }
+};
+
+static const value_string sm_message_type_value_info[] = {
+    { MESSAGE_TYPE_START,             "Start" },
+    { MESSAGE_TYPE_STOP,              "Stop" },
+    { MESSAGE_TYPE_ACTIVE,            "Active" },
+    { MESSAGE_TYPE_STANDBY,           "Standby" },
+    { MESSAGE_TYPE_Q_HOLD_INVOKE,     "Q_HOLD Invoke" },
+    { MESSAGE_TYPE_Q_HOLD_RESPONSE,   "Q_HOLD Response" },
+    { MESSAGE_TYPE_Q_RESUME_INVOKE,   "Q_RESUME Invoke" },
+    { MESSAGE_TYPE_Q_RESUME_RESPONSE, "Q_RESUME Response" },
+    { MESSAGE_TYPE_Q_RESET_INVOKE,    "Q_RESET Invoke" },
+    { MESSAGE_TYPE_Q_RESET_RESPONSE,  "Q_RESET Response" },
+    { MESSAGE_TYPE_PDU,               "PDU" },
+    { 0, NULL }
+};
+
+static const value_string sm_alignment_type[] = {
+    { 0x00, "Unknown (probably linkset was already up)"},
+    { 0x03, "Emergency alignment"},
+    { 0x04, "Normal alignment"},
+    { 0x05, "Power On MTP2"},
+    { 0x06, "Start MTP2"},
+    { 0, NULL}
+};
+
+static const value_string sm_backhaul_reason_code[] = {
+    { 0x00, "Layer management request"},
+    { 0x01, "SUERM (Signal Unit Error Monitor) failure"},
+    { 0x02, "Excessively long alignment period"},
+    { 0x03, "T7 timer expired"},
+    { 0x04, "Physical interface failure"},
+    { 0x05, "Two or three invalid BSNs"},
+    { 0x06, "Two or three invalid FIBs"},
+    { 0x07, "LSSU (Link Status Signal Unit) condition"},
+    { 0x13, "SIOs (Service Information Octets) received "
+            "in Link State Control (LSC)"},
+    { 0x14, "Timer T2 expired waiting for SIO"},
+    { 0x15, "Timer T3 expired waiting for SIE/SIN "},
+    { 0x16, "SIO received in initial alignment control (IAC)"},
+    { 0x17, "Proving period failure"},
+    { 0x18, "Timer T1 expired waiting for FISU (Fill-In Signal Unit)"},
+    { 0x19, "SIN received in the in-service state"},
+    { 0x20, "CTS lost"},
+    { 0x25, "No resources"},
+    {    0, NULL}
+};
+
+static const value_string sm_backhaul_event_code[] = {
+    { 0x00, "Local processor outage"},
+    { 0x01, "Local processor outage recovered"},
+    { 0x02, "Entered a congested state"},
+    { 0x03, "Exited a congested state"},
+    { 0x04, "Physical layer up"},
+    { 0x05, "Physical layer down"},
+    { 0x06, "Protocol error"},
+    { 0x07, "Link is aligned"},
+    { 0x08, "Link alignment lost"},
+    { 0x09, "Retransmit buffer full"},
+    { 0x0a, "Retransmit buffer no longer full"},
+    { 0x0b, "Negative acknowledgment"},
+    { 0x0c, "Remote entered congestion"},
+    { 0x0d, "Remote exited congestion"},
+    { 0x0e, "Remote entered processor outage"},
+    { 0x0f, "Remote exited processor outage"},
+    {    0, NULL}
+};
+
+static const value_string sm_backhaul_cause_code[] = {
+    { 0x00, "Unknown (default)"},
+    { 0x01, "Management initiated"},
+    { 0x02, "Abnormal BSN (backward sequence number)"},
+    { 0x03, "Abnormal FIB (Forward Indicator Bit)"},
+    { 0x04, "Congestion discard"},
+    {    0, NULL}
+};
+
+static const value_string sm_linkdown_cause_code[] = {
+    { 0x00, "Unknown (default)"},
+    { 0x01, "Management initiated"},
+    { 0x03, "Congestion ended"},
+    {    0, NULL}
+};
+
+static const value_string sm_retrieval_type[] = {
+    { 0x01, "Request for BSN"},
+    { 0x02, "Request for MSUs"},
+    { 0x03, "Request to drop MSUs"},
+    {    0, NULL}
+};
+
+static const value_string sm_lsc_state_type[] = {
+    { 0x00, "Set LPO"},
+    { 0x01, "Clear LPO"},
+    { 0x02, "Set Emergency"},
+    { 0x03, "Clear Emergency"},
+    { 0x04, "Clear Buffers"},
+    { 0x05, "Clear Transmit Buffer"},
+    { 0x06, "Clear ReTransmission Buffer"},
+    { 0x07, "Clear Receive Buffer"},
+    { 0x08, "Continue"},
+    { 0x09, "Power On"},
+    { 0x0a, "Start"},
+    { 0x0b, "Stop"},
+    {    0, NULL}
+};
+
+static const value_string sm_stat_request_type[] = {
+    { 0x00, "Reset"},
+    { 0x01, "Send & Reset"},
+    { 0x02, "Send"},
+    {    0, NULL}
+};
+
+#define PDU_CONNECT_REQUEST       0x06
+#define PDU_CONNECT_CONFIRM       0x07
+#define PDU_DISCONNECT_CONFIRM    0x0b
+#define PDU_DISCONNECT_INDICATION 0x0c
+#define PDU_MTP3_TO_SLT           0x10
+#define PDU_MTP3_FROM_SLT         0x11
+#define PDU_RETRIEVAL_REQUEST     0x12
+#define PDU_RETRIEVAL_CONFIRM     0x13
+#define PDU_LSC_REQUEST           0x20
+#define PDU_LSC_CONFIRM           0x21
+#define PDU_LSC_INDICATION        0x22
+#define PDU_STAT_REQUEST          0x44
+
+static const value_string sm_pdu_type_value[] = {
+    { PDU_CONNECT_REQUEST,       "Connect Request"},
+    { PDU_CONNECT_CONFIRM,       "Connect Confirm"},
+    { 0x0a,                      "Disconnect Request"},
+    { PDU_DISCONNECT_CONFIRM,    "Disconnect Confirm"},
+    { PDU_DISCONNECT_INDICATION, "Disconnect Indication Message"},
+    { PDU_MTP3_TO_SLT,           "MSU Request (message to MTP2 link)"},
+    { PDU_MTP3_FROM_SLT,         "MSU Indication (message from MTP2 link)"},
+    { PDU_RETRIEVAL_REQUEST,     "Retrieval Request"},
+    { PDU_RETRIEVAL_CONFIRM,     "Retrieval Confirm"},
+    { 0x14,                      "Retrieval Indication"},
+    { 0x15,                      "Retrieval Message"},
+    { PDU_LSC_REQUEST,           "Link State Controller Request"},
+    { PDU_LSC_CONFIRM,           "Link State Controller Confirm"},
+    { PDU_LSC_INDICATION,        "Link State Controller Indication"},
+    { 0x40,                      "Configuration Request"},
+    { 0x41,                      "Configuration Confirm"},
+    { 0x42,                      "Status Request"},
+    { 0x43,                      "Status Confirm"},
+    { PDU_STAT_REQUEST,          "Statistic Request"},
+    { 0x45,                      "Statistic Confirm"},
+    { 0x46,                      "Control Request"},
+    { 0x47,                      "Control Confirm"},
+    { 0x50,                      "Flow Control Request"},
+    { 0x51,                      "Flow Control Indication"},
+    { 0,                    NULL }
+};
+
+/* TODO: Change to useful name once known */
+#define SM_PROTOCOL_X004 0x0004 /* https://gitlab.com/wireshark/wireshark/-/issues/7188 */
+/* RUDP/SM stack called BSM V1 (version 1 versus Version 0 used for SS7). */
+#define SM_PROTOCOL_X100 0x0100
+#define SM_PROTOCOL_X101 0x0101
+#define SM_PROTOCOL_X114 0x0114
+#define SM_PROTOCOL_X122 0x0122
+
+
+/* Initialize the protocol and registered fields */
+static int proto_sm = -1;
+
+static int hf_sm_sm_msg_type = -1;
+static int hf_sm_protocol = -1;
+static int hf_sm_msg_id = -1;
+static int hf_sm_msg_type = -1;
+static int hf_sm_channel = -1;
+static int hf_sm_bearer = -1;
+static int hf_sm_len = -1;
+static int hf_sm_ip_addr = -1;
+static int hf_sm_context = -1;
+static int hf_sm_eisup_msg_id = -1;
+static int hf_sm_tag = -1;
+static int hf_sm_alignment_type = -1;
+static int hf_sm_backhaul_reason_code = -1;
+static int hf_sm_backhaul_event_code = -1;
+static int hf_sm_backhaul_cause_code = -1;
+static int hf_sm_linkdown_cause_code = -1;
+static int hf_sm_retrieval_type = -1;
+static int hf_sm_lsc_state_type = -1;
+static int hf_sm_stat_request_type = -1;
+static int hf_sm_bsn_num = -1;
+
+/* Initialize the subtree pointers */
+static gint ett_sm = -1;
+
+static dissector_handle_t sdp_handle;
+static dissector_handle_t mtp3_handle;
+static dissector_handle_t q931_handle;
+
+/* Code to actually dissect the packets */
+static int
+dissect_sm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
+{
+    proto_item *ti;
+    proto_tree *sm_tree;
+    tvbuff_t   *next_tvb      = NULL;
+    guint32     sm_message_type;
+    guint32     bh_event_code = 0;
+    guint16     protocol;
+    guint16     msg_type      = 0;
+    guint16     length;
+    guint16     tag;
+    int         offset        = 0;
+
+    sm_message_type = tvb_get_ntohl(tvb,offset);
+
+    col_set_str(pinfo->cinfo, COL_PROTOCOL, "SM");
+
+    col_add_fstr(pinfo->cinfo, COL_INFO, "Cisco SM Packet (%s)",
+        val_to_str_const(sm_message_type, sm_message_type_value_info,"reserved"));
+
+    ti = proto_tree_add_item(tree, proto_sm, tvb, offset, -1, ENC_NA);
+    sm_tree = proto_item_add_subtree(ti, ett_sm);
+
+    proto_tree_add_uint_format_value(sm_tree, hf_sm_sm_msg_type, tvb, offset, 4, sm_message_type,
+        "%s (0x%0x)", val_to_str_const(sm_message_type, sm_message_type_value, "reserved"), sm_message_type);
+
+    offset = offset + 4;
+    if (sm_message_type ==  MESSAGE_TYPE_PDU) {
+        proto_tree_add_item(sm_tree, hf_sm_protocol, tvb, offset, 2, ENC_BIG_ENDIAN);
+        protocol = tvb_get_ntohs(tvb,offset);
+        offset = offset + 2;
+        switch(protocol){
+        /* start case RUDP BSM v.1  ---------------------------------------------------------- */
+        case SM_PROTOCOL_X004:
+            proto_tree_add_item(sm_tree, hf_sm_msg_id, tvb, offset, 2, ENC_BIG_ENDIAN);
+            offset = offset +2;
+            msg_type = tvb_get_ntohs(tvb,offset);
+            proto_tree_add_uint_format_value(sm_tree, hf_sm_msg_type, tvb, offset, 2, msg_type,
+                "%s (0x%0x)", val_to_str_const(msg_type, sm_pdu_type_value, "reserved"),
+                msg_type);
+            msg_type = tvb_get_ntohs(tvb,offset);
+            offset = offset + 2;
+            proto_tree_add_item(sm_tree, hf_sm_channel, tvb, offset, 2, ENC_BIG_ENDIAN);
+            offset = offset + 2;
+            proto_tree_add_item(sm_tree, hf_sm_bearer, tvb, offset, 2, ENC_BIG_ENDIAN);
+            offset = offset +2;
+            proto_tree_add_item(sm_tree, hf_sm_len, tvb, offset, 2, ENC_BIG_ENDIAN);
+            length = tvb_get_ntohs(tvb,offset);
+            offset = offset +2;
+            proto_item_set_len(ti, 16);
+
+            if (length > 0) {
+                next_tvb = tvb_new_subset_length(tvb, offset, length);
+
+                if ((msg_type == PDU_MTP3_TO_SLT || msg_type == PDU_MTP3_FROM_SLT)) {
+                    call_dissector(q931_handle, next_tvb, pinfo, tree);
+                } else {
+                    call_data_dissector(next_tvb, pinfo, tree);
+                }
+            }
+
+            break;
+            /* end case RUDP BSM v.1 ---------------------------------------------------------- */
+
+        case SM_PROTOCOL_X100:
+        case SM_PROTOCOL_X122:
+            /* Protocol 0x100/0x122 only contains a length and then an EISUP packet */
+            proto_tree_add_item(sm_tree, hf_sm_len, tvb, offset, 2, ENC_BIG_ENDIAN);
+            length = tvb_get_ntohs(tvb,offset);
+            offset = offset + 2;
+            proto_item_set_len(ti, 8);
+
+            /* This should be the EISUP dissector but we haven't got one
+             * right now - so decode it as data for now ... */
+            next_tvb = tvb_new_subset_length(tvb, offset, length);
+            call_data_dissector(next_tvb, pinfo, sm_tree);
+
+            break;
+        case SM_PROTOCOL_X101:
+            /* XXX Reverse enginered so this may not be correct!!!
+             * EISUP - used between Cisco HSI and Cisco PGW devices,
+             * uses RUDP with default port number 8003.
+             * Protocol stack is RUDP->Cisco SM->SDP.
+             * This implementation is PROPRIETARY
+             */
+            proto_tree_add_item(sm_tree, hf_sm_len, tvb, offset, 2, ENC_BIG_ENDIAN);
+            length = tvb_get_ntohs(tvb,offset);
+            offset = offset + 2;
+            proto_item_set_len(ti, length + offset);
+            /* The next stuff seems to be IP addr */
+            proto_tree_add_item(sm_tree, hf_sm_ip_addr, tvb, offset, 4, ENC_BIG_ENDIAN);
+            offset = offset + 4;
+            /* This part looks to be the same per session */
+            proto_tree_add_item(sm_tree, hf_sm_context, tvb, offset, 4, ENC_BIG_ENDIAN);
+            offset = offset +4;
+            /* Some sort of message type? */
+            proto_tree_add_item(sm_tree, hf_sm_eisup_msg_id, tvb, offset, 1, ENC_BIG_ENDIAN);
+            offset = offset + 1;
+            /* XXX Problem are tags 1 or two bytes???*/
+            proto_tree_add_item(sm_tree, hf_sm_tag, tvb, offset, 2, ENC_BIG_ENDIAN);
+
+            tag = tvb_get_ntohs(tvb,offset);
+            offset = offset +2;
+            if (tag== 0x01ac) {
+                proto_tree_add_item(sm_tree, hf_sm_len, tvb, offset, 2, ENC_BIG_ENDIAN);
+                length = tvb_get_ntohs(tvb,offset);
+                offset = offset +2;
+                next_tvb = tvb_new_subset_length(tvb, offset, length);
+                call_dissector(sdp_handle, next_tvb, pinfo, sm_tree);
+                /*offset = offset+length;*/
+
+            }
+            /*return;*/
+            break;
+        case SM_PROTOCOL_X114:
+            /* XXX Reverse enginered so this may not be correct!!! */
+            proto_tree_add_item(sm_tree, hf_sm_len, tvb, offset, 2, ENC_BIG_ENDIAN);
+            length = tvb_get_ntohs(tvb,offset);
+            offset = offset + 2;
+            proto_item_set_len(ti, length + offset);
+            /* The next stuff seems to be IP addr */
+            proto_tree_add_item(sm_tree, hf_sm_ip_addr, tvb, offset, 4, ENC_BIG_ENDIAN);
+            offset = offset + 4;
+            proto_tree_add_item(sm_tree, hf_sm_context, tvb, offset, 4, ENC_BIG_ENDIAN);
+            offset = offset +4;
+            /* Some sort of message type? */
+            proto_tree_add_item(sm_tree, hf_sm_eisup_msg_id, tvb, offset, 1, ENC_BIG_ENDIAN);
+            offset = offset + 1;
+            /* XXX Problem are tags 1 or two bytes???*/
+            proto_tree_add_item(sm_tree, hf_sm_tag, tvb, offset, 2, ENC_BIG_ENDIAN);
+
+            tag = tvb_get_ntohs(tvb,offset);
+            offset = offset +2;
+            if (tag== 0x01ac) {
+                proto_tree_add_item(sm_tree, hf_sm_len, tvb, offset, 2, ENC_BIG_ENDIAN);
+                length = tvb_get_ntohs(tvb,offset);
+                offset = offset +2;
+                next_tvb = tvb_new_subset_length(tvb, offset, length);
+                call_dissector(sdp_handle, next_tvb, pinfo, sm_tree);
+                /*offset = offset+length;*/
+
+            }
+            break;
+        default:
+            proto_tree_add_item(sm_tree, hf_sm_msg_id, tvb, offset, 2, ENC_BIG_ENDIAN);
+            offset = offset +2;
+            msg_type = tvb_get_ntohs(tvb,offset);
+            proto_tree_add_uint_format_value(sm_tree, hf_sm_msg_type, tvb, offset, 2, msg_type,
+                "%s (0x%0x)", val_to_str_const(msg_type, sm_pdu_type_value, "reserved"),
+                msg_type);
+            msg_type = tvb_get_ntohs(tvb,offset);
+            offset = offset + 2;
+            proto_tree_add_item(sm_tree, hf_sm_channel, tvb, offset, 2, ENC_BIG_ENDIAN);
+            offset = offset + 2;
+            proto_tree_add_item(sm_tree, hf_sm_bearer, tvb, offset, 2, ENC_BIG_ENDIAN);
+            offset = offset +2;
+            proto_tree_add_item(sm_tree, hf_sm_len, tvb, offset, 2, ENC_BIG_ENDIAN);
+            length = tvb_get_ntohs(tvb,offset);
+            offset = offset +2;
+            proto_item_set_len(ti, 16);
+
+            if (length > 0) {
+                next_tvb = tvb_new_subset_length(tvb, offset, length);
+
+                switch (msg_type) {
+                case PDU_MTP3_TO_SLT:
+                case PDU_MTP3_FROM_SLT:
+                    call_dissector(mtp3_handle, next_tvb, pinfo, tree);
+                    break;
+                case PDU_CONNECT_REQUEST:
+                case PDU_CONNECT_CONFIRM:
+                    proto_tree_add_item(sm_tree, hf_sm_alignment_type, tvb, offset, 4, ENC_BIG_ENDIAN);
+                    break;
+                case PDU_DISCONNECT_CONFIRM:
+                case PDU_DISCONNECT_INDICATION:
+                    proto_tree_add_item(sm_tree, hf_sm_backhaul_reason_code, tvb, offset, 4, ENC_BIG_ENDIAN);
+                    break;
+                case PDU_RETRIEVAL_REQUEST:
+                case PDU_RETRIEVAL_CONFIRM:
+                    proto_tree_add_item(sm_tree, hf_sm_retrieval_type, tvb, offset, 4, ENC_BIG_ENDIAN);
+                    if (msg_type == PDU_RETRIEVAL_CONFIRM && tvb_get_ntohl(tvb,offset) == 0x01) {
+                        offset += 4;
+                        proto_tree_add_item(sm_tree, hf_sm_bsn_num, tvb, offset, 4, ENC_BIG_ENDIAN);
+                    }
+                    break;
+                case PDU_LSC_REQUEST:
+                case PDU_LSC_CONFIRM:
+                    proto_tree_add_item(sm_tree, hf_sm_lsc_state_type, tvb, offset, 4, ENC_BIG_ENDIAN);
+                    break;
+                case PDU_LSC_INDICATION:
+                    proto_tree_add_item(sm_tree, hf_sm_backhaul_event_code, tvb, offset, 4, ENC_BIG_ENDIAN);
+                    bh_event_code = tvb_get_ntohl(tvb,offset);
+                    if (bh_event_code == 0x02 || bh_event_code == 0x04) {
+                        offset += 4;
+                        proto_tree_add_item(sm_tree, hf_sm_linkdown_cause_code, tvb, offset, 4, ENC_BIG_ENDIAN);
+                    } else if (bh_event_code == 0x06) {
+                        offset += 4;
+                        proto_tree_add_item(sm_tree, hf_sm_backhaul_cause_code, tvb, offset, 4, ENC_BIG_ENDIAN);
+                    }
+                    break;
+                case PDU_STAT_REQUEST:
+                    proto_tree_add_item(sm_tree, hf_sm_stat_request_type, tvb, offset, 4, ENC_BIG_ENDIAN);
+                    break;
+                default:
+                    call_data_dissector(next_tvb, pinfo, tree);
+                }
+            }
+        }
+    }
+
+    return tvb_captured_length(tvb);
+}
+
+void
+proto_register_sm(void)
+{
+    static hf_register_info hf[] = {
+        { &hf_sm_sm_msg_type,
+            { "SM Message Type",           "sm.sm_msg_type",
+            FT_UINT32, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_sm_protocol,
+            { "Protocol Type",           "sm.protocol",
+            FT_UINT16, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_sm_msg_id,
+            { "Message ID",           "sm.msgid",
+            FT_UINT16, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_sm_msg_type,
+            { "Message Type",           "sm.msg_type",
+            FT_UINT16, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_sm_channel,
+            { "Channel ID",           "sm.channel",
+            FT_UINT16, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_sm_bearer,
+            { "Bearer ID",           "sm.bearer",
+            FT_UINT16, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_sm_len,
+            { "Length",           "sm.len",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_sm_ip_addr,
+            { "IPv4 address","sm.ip_addr",
+            FT_IPv4,BASE_NONE,  NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_sm_context,
+            { "Context","sm.context",
+            FT_UINT32, BASE_DEC, NULL, 0x0,
+            "Context(guesswork!)", HFILL }
+        },
+        { &hf_sm_eisup_msg_id,
+            { "Message id","sm.eisup_message_id",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            "Message id(guesswork!)", HFILL }
+        },
+        { &hf_sm_tag,
+            { "Tag","sm.tag",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            "Tag(guesswork!)", HFILL }
+        },
+        { &hf_sm_alignment_type,
+          { "Alignment type","sm.connect_type",
+            FT_UINT32, BASE_HEX, VALS(sm_alignment_type), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_sm_backhaul_reason_code,
+          { "Backhaul reason code","sm.backhaul_reason",
+            FT_UINT32, BASE_HEX, VALS(sm_backhaul_reason_code), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_sm_backhaul_event_code,
+          { "Backhaul event code","sm.backhaul_event",
+            FT_UINT32, BASE_HEX, VALS(sm_backhaul_event_code), 0x0,
+                        NULL, HFILL }
+        },
+        { &hf_sm_backhaul_cause_code,
+          { "Backhaul cause code","sm.backhaul_cause",
+            FT_UINT32, BASE_HEX, VALS(sm_backhaul_cause_code), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_sm_linkdown_cause_code,
+          { "Link down cause","sm.linkdown_reason",
+            FT_UINT32, BASE_HEX, VALS(sm_linkdown_cause_code), 0x0,
+            NULL, HFILL }
+        },
+
+        { &hf_sm_retrieval_type,
+          { "Retrieval type","sm.retrieval_type",
+            FT_UINT32, BASE_HEX, VALS(sm_retrieval_type), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_sm_lsc_state_type,
+          { "LSC Request type","sm.lsc_state_type",
+            FT_UINT32, BASE_HEX, VALS(sm_lsc_state_type), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_sm_stat_request_type,
+          { "Statistic request type","sm.stat_request_type",
+            FT_UINT32, BASE_HEX, VALS(sm_stat_request_type), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_sm_bsn_num,
+          { "BSN","sm.bsn_num",
+            FT_UINT32, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+
+    };
+
+/* Setup protocol subtree array */
+    static gint *ett[] = {
+        &ett_sm,
+    };
+
+/* Register the protocol name and description */
+    proto_sm = proto_register_protocol("Cisco Session Management",
+        "SM", "sm");
+
+    register_dissector("sm", dissect_sm, proto_sm);
+
+/* Required function calls to register the header fields and subtrees used */
+    proto_register_field_array(proto_sm, hf, array_length(hf));
+    proto_register_subtree_array(ett, array_length(ett));
+}
+
+void
+proto_reg_handoff_sm(void)
+{
+    sdp_handle  = find_dissector_add_dependency("sdp", proto_sm);
+    mtp3_handle = find_dissector_add_dependency("mtp3", proto_sm);
+    q931_handle = find_dissector_add_dependency("q931", proto_sm);
+}
+
+/*
+ * 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:
+ */