/*
 * packet-3g-a11.c
 * Routines for CDMA2000 A11 packet trace
 * Copyright 2002, Ryuji Somegawa <somegawa@wide.ad.jp>
 * packet-3g-a11.c was written based on 'packet-mip.c'.
 *
 * packet-3g-a11.c updated by Ravi Valmikam for 3GPP2 TIA-878-A
 * Copyright 2005, Ravi Valmikam <rvalmikam@airvananet.com>
 *
 * packet-mip.c
 * Routines for Mobile IP dissection
 * Copyright 2000, Stefan Raab <sraab@cisco.com>
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 *
 *Ref:
 * https://www.3gpp2.org/Public_html/Specs/A.S0009-C_v3.0_100621.pdf
 * https://www.3gpp2.org/Public_html/Specs/A.S0017-D_v1.0_070624.pdf (IOS 5.1)
 * https://www.3gpp2.org/Public_html/Specs/A.S0017-D_v2.0_090825.pdf
 * https://www.3gpp2.org/Public_html/Specs/A.S0017-D%20v3.0_Interoperability%20Specification%20%28IOS%29%20for%20cdma2000%20Access%20Network%20Interfaces%20-%20Part%207%20%28A10%20and%20A11%20Interfaces%29_20110701.pdf
 * https://www.3gpp2.org/Public_html/Specs/A00-20110419-002Er0%20A.S0008-C%20v4.0%20HRPD%20IOS-Pub_20110513.pdf
 * https://www.3gpp2.org/Public_html/Specs/A.S0022-0_v2.0_100426.pdf
 *
 * https://web.archive.org/web/20070812071100/http://3gpp2.org:80/Public_html/specs/A.S0017-0_v2.0.pdf
 */

#include "config.h"

#include <epan/packet.h>
#include <epan/expert.h>
/* Include vendor id translation */
#include <epan/sminmpec.h>
#include <epan/addr_resolv.h>
#include <epan/tfs.h>

#include "packet-radius.h"

/* Forward declarations */
void proto_register_a11(void);
void proto_reg_handoff_a11(void);

static int registration_request_msg;

/* Initialize the protocol and registered fields */
static int proto_a11;
static int hf_a11_type;
static int hf_a11_flags;
static int hf_a11_s;
static int hf_a11_b;
static int hf_a11_d;
static int hf_a11_m;
static int hf_a11_g;
static int hf_a11_v;
static int hf_a11_t;
static int hf_a11_code;
static int hf_a11_status;
static int hf_a11_life;
static int hf_a11_homeaddr;
static int hf_a11_haaddr;
static int hf_a11_coa;
static int hf_a11_ident;
static int hf_a11_ext_type;
static int hf_a11_ext_stype;
static int hf_a11_ext_len;
static int hf_a11_ext;
static int hf_a11_aext_spi;
static int hf_a11_aext_auth;
static int hf_a11_next_nai;

static int hf_a11_ses_key;
static int hf_a11_ses_mnsrid;
static int hf_a11_ses_sidver;
static int hf_a11_ses_msid_type;
static int hf_a11_ses_msid_len;
static int hf_a11_ses_msid;
static int hf_a11_ses_ptype;

static int hf_a11_vse_vid;
static int hf_a11_vse_apptype;
static int hf_a11_vse_canid;
static int hf_a11_vse_panid;
static int hf_a11_vse_srvopt;
static int hf_a11_vse_qosmode;
static int hf_a11_vse_pdit;
static int hf_a11_vse_session_parameter;
static int hf_a11_vse_code;
static int hf_a11_vse_dormant;
static int hf_a11_vse_ehrpd_mode;
static int hf_a11_vse_ehrpd_pmk;
static int hf_a11_vse_ehrpd_handoff_info;
static int hf_a11_vse_ehrpd_tunnel_mode;
static int hf_a11_vse_ppaddr;

/* Additional Session Information */
static int hf_a11_ase_len_type;
static int hf_a11_ase_srid_type;
static int hf_a11_ase_servopt_type;
static int hf_a11_ase_gre_proto_type;
static int hf_a11_ase_gre_key;
static int hf_a11_ase_pcf_addr_key;

static int hf_a11_ase_forward_rohc_info_len;
static int hf_a11_ase_forward_maxcid;
static int hf_a11_ase_forward_mrru;
static int hf_a11_ase_forward_large_cids;
static int hf_a11_ase_forward_profile_count;
static int hf_a11_ase_forward_profile;

static int hf_a11_ase_reverse_rohc_info_len;
static int hf_a11_ase_reverse_maxcid;
static int hf_a11_ase_reverse_mrru;
static int hf_a11_ase_reverse_large_cids;
static int hf_a11_ase_reverse_profile_count;
static int hf_a11_ase_reverse_profile;
static int hf_a11_aut_flow_prof_sub_type;
static int hf_a11_aut_flow_prof_sub_type_len;
static int hf_a11_aut_flow_prof_sub_type_value;
static int hf_a11_serv_opt_prof_max_serv;
static int hf_a11_sub_type;
static int hf_a11_sub_type_length;
static int hf_a11_serv_opt;
static int hf_a11_max_num_serv_opt;
static int hf_a11_bcmcs_stype;
static int hf_a11_bcmcs_entry_len;

/* Forward QoS Information */
static int hf_a11_fqi_srid;
static int hf_a11_fqi_flags;
static int hf_a11_fqi_flags_ip_flow;
static int hf_a11_fqi_flags_dscp;
static int hf_a11_fqi_entry_flag;
static int hf_a11_fqi_entry_flag_dscp;
static int hf_a11_fqi_entry_flag_flow_state;
static int hf_a11_fqi_flowcount;
static int hf_a11_fqi_flowid;
static int hf_a11_fqi_entrylen;
/* static int hf_a11_fqi_flowstate; */
static int hf_a11_fqi_requested_qoslen;
static int hf_a11_fqi_flow_priority;
static int hf_a11_fqi_num_qos_attribute_set;
static int hf_a11_fqi_qos_attribute_setlen;
static int hf_a11_fqi_qos_attribute_setid;
static int hf_a11_fqi_qos_granted_attribute_setid;
static int hf_a11_fqi_verbose;
static int hf_a11_fqi_flow_profileid;
static int hf_a11_fqi_granted_qoslen;

/* Reverse QoS Information */
static int hf_a11_rqi_srid;
static int hf_a11_rqi_flowcount;
static int hf_a11_rqi_flowid;
static int hf_a11_rqi_entrylen;
static int hf_a11_rqi_entry_flag;
static int hf_a11_rqi_entry_flag_flow_state;
/* static int hf_a11_rqi_flowstate; */
static int hf_a11_rqi_requested_qoslen;
static int hf_a11_rqi_flow_priority;
static int hf_a11_rqi_num_qos_attribute_set;
static int hf_a11_rqi_qos_attribute_setlen;
static int hf_a11_rqi_qos_attribute_setid;
static int hf_a11_rqi_qos_granted_attribute_setid;
static int hf_a11_rqi_verbose;
static int hf_a11_rqi_flow_profileid;
/* static int hf_a11_rqi_requested_qos; */
static int hf_a11_rqi_granted_qoslen;
/* static int hf_a11_rqi_granted_qos; */

/* QoS Update Information */
static int hf_a11_fqui_flowcount;
static int hf_a11_rqui_flowcount;
static int hf_a11_fqui_updated_qoslen;
static int hf_a11_fqui_updated_qos;
static int hf_a11_rqui_updated_qoslen;
static int hf_a11_rqui_updated_qos;
static int hf_a11_subscriber_profile;
/* static int hf_a11_subscriber_profile_len; */

/* Initialize the subtree pointers */
static int ett_a11;
static int ett_a11_flags;
static int ett_a11_ext;
static int ett_a11_exts;
static int ett_a11_radius;
static int ett_a11_radiuses;
static int ett_a11_ase;
static int ett_a11_fqi_flowentry;
static int ett_a11_fqi_requestedqos;
static int ett_a11_fqi_qos_attribute_set;
static int ett_a11_fqi_grantedqos;
static int ett_a11_rqi_flowentry;
static int ett_a11_rqi_requestedqos;
static int ett_a11_rqi_qos_attribute_set;
static int ett_a11_rqi_grantedqos;
static int ett_a11_fqi_flags;
static int ett_a11_fqi_entry_flags;
static int ett_a11_rqi_entry_flags;
static int ett_a11_fqui_flowentry;
static int ett_a11_rqui_flowentry;
static int ett_a11_subscriber_profile;
static int ett_a11_forward_rohc;
static int ett_a11_reverse_rohc;
static int ett_a11_forward_profile;
static int ett_a11_reverse_profile;
static int ett_a11_aut_flow_profile_ids;
static int ett_a11_bcmcs_entry;

static expert_field ei_a11_sub_type_length_not2;
static expert_field ei_a11_sse_too_short;
static expert_field ei_a11_bcmcs_too_short;
static expert_field ei_a11_entry_data_not_dissected;
static expert_field ei_a11_session_data_not_dissected;

static dissector_handle_t a11_handle;

/* Port used for Mobile IP based Tunneling Protocol (A11) */
#define UDP_PORT_3GA11    699 /* Not IANA registered */

typedef enum {
    REGISTRATION_REQUEST     = 1,
    REGISTRATION_REPLY       = 3,
    REGISTRATION_UPDATE      = 20,
    REGISTRATION_ACK         = 21,
    SESSION_UPDATE           = 22,
    SESSION_ACK              = 23,
    CAPABILITIES_INFO        = 24,
    CAPABILITIES_INFO_ACK    = 25,
    BC_SERVICE_REQUEST       = 0xb0,  /* 3GPP2 A.S0019-A v2.0 */
    BC_SERVICE_REPLY         = 0xb1,
    BC_REGISTRATION_REQUEST  = 0xb2,
    BC_REGISTRATION_REPLY    = 0xb3,
    BC_REGISTRATION_UPDATE   = 0xb4,
    BC_REGISTRATION_ACK      = 0xb5

} a11MessageTypes;

static const value_string a11_types[] = {
    {REGISTRATION_REQUEST,    "Registration Request"},
    {REGISTRATION_REPLY,      "Registration Reply"},
    {REGISTRATION_UPDATE,     "Registration Update"},
    {REGISTRATION_ACK,        "Registration Ack"},
    {SESSION_UPDATE,          "Session Update"},
    {SESSION_ACK,             "Session Update Ack"},
    {CAPABILITIES_INFO,       "Capabilities Info"},
    {CAPABILITIES_INFO_ACK,   "Capabilities Info Ack"},
    {BC_SERVICE_REQUEST,      "BC Service Request"},
    {BC_SERVICE_REPLY,        "BC Service Response"},
    {BC_REGISTRATION_REQUEST, "BC Registration RequestT"},
    {BC_REGISTRATION_REPLY,   "BC Registration Reply"},
    {BC_REGISTRATION_UPDATE,  "BC Registration Update"},
    {BC_REGISTRATION_ACK,     "BC Registration Acknowledge"},

    {0, NULL},
};
static value_string_ext a11_types_ext = VALUE_STRING_EXT_INIT(a11_types);

static const value_string a11_ses_ptype_vals[] = {
    {0x8881, "Unstructured Byte Stream"},
    {0x88D2, "3GPP2 Packet"},
    {0, NULL},
};

static const value_string a11_reply_codes[]= {
    {0,  "Reg Accepted"},
    {9,  "Connection Update"},
#if 0
    {1,  "Reg Accepted, but Simultaneous Bindings Unsupported."},
    {64, "Reg Deny (FA)- Unspecified Reason"},
    {65, "Reg Deny (FA)- Administratively Prohibited"},
    {66, "Reg Deny (FA)- Insufficient Resources"},
    {67, "Reg Deny (FA)- MN failed Authentication"},
    {68, "Reg Deny (FA)- HA failed Authentication"},
    {69, "Reg Deny (FA)- Requested Lifetime too Long"},
    {70, "Reg Deny (FA)- Poorly Formed Request"},
    {71, "Reg Deny (FA)- Poorly Formed Reply"},
    {72, "Reg Deny (FA)- Requested Encapsulation Unavailable"},
    {73, "Reg Deny (FA)- VJ Compression Unavailable"},
    {74, "Reg Deny (FA)- Requested Reverse Tunnel Unavailable"},
    {75, "Reg Deny (FA)- Reverse Tunnel is Mandatory and 'T' Bit Not Set"},
    {76, "Reg Deny (FA)- Mobile Node Too Distant"},
    {79, "Reg Deny (FA)- Delivery Style Not Supported"},
    {80, "Reg Deny (FA)- Home Network Unreachable"},
    {81, "Reg Deny (FA)- HA Host Unreachable"},
    {82, "Reg Deny (FA)- HA Port Unreachable"},
    {88, "Reg Deny (FA)- HA Unreachable"},
    {96, "Reg Deny (FA)(NAI) - Non Zero Home Address Required"},
    {97, "Reg Deny (FA)(NAI) - Missing NAI"},
    {98, "Reg Deny (FA)(NAI) - Missing Home Agent"},
    {99, "Reg Deny (FA)(NAI) - Missing Home Address"},
#endif
    {128, "Registration Denied - Unspecified"},                                        /* 3GPP2 A.S0017-D v4.0 */
    {129, "Registration Denied - Administratively Prohibited"},
    {130, "Registration Denied - Insufficient Resources"},
    {131, "Registration Denied - PCF Failed Authentication"},
    /* {132, "Reg Deny (HA)- FA Failed Authentication"}, */
    {133, "Registration Denied - Identification Mismatch"},
    {134, "Registration Denied - Poorly Formed Request"},
    /* {135, "Reg Deny (HA)- Too Many Simultaneous Bindings"}, */
    {136, "Registration Denied - Unknown PDSN Address"},
    {137, "Registration Denied - Requested Reverse Tunnel Unavailable"},
    {138, "Registration Denied - Reverse Tunnel is Mandatory and 'T' Bit Not Set"},
    {139, "Registration Denied - service option not supported"},
    {140, "Registration Denied - no CID available"},
    {141, "Registration Denied - unsupported Vendor ID / Application Type in CVSE"},
    {142, "Registration Denied - nonexistent A10 or IP flow"},
    {0, NULL},
};
static value_string_ext a11_reply_codes_ext = VALUE_STRING_EXT_INIT(a11_reply_codes);

static const value_string a11_ack_status[]= {
    {0x00, "Update Accepted"},
    {0x01, "Partial QoS updated"},
    {0x80, "Update Denied - reason unspecified"},
    {0x83, "Update Denied - sending node failed authentication"},
    {0x85, "Update Denied - identification mismatch)"},
    {0x86, "Update Denied - poorly formed registration update"},
    {0xc9, "Update Denied - Session Parameter Not Updated"},
    {0xca, "Update Denied - PMK not requested"},
    {0xfd, "Update Denied - QoS profileID not supported"},
    {0xfe, "Update Denied - insufficient resources"},
    {0xff, "Update Denied - handoff in progress"},
    {0, NULL},
};
static value_string_ext a11_ack_status_ext = VALUE_STRING_EXT_INIT(a11_ack_status);

typedef enum {
    MH_AUTH_EXT      = 32,
    MF_AUTH_EXT      = 33,
    FH_AUTH_EXT      = 34,
    GEN_AUTH_EXT     = 36,  /* RFC 3012 */
    OLD_CVSE_EXT     = 37,  /* RFC 3115 */
    CVSE_EXT         = 38,  /* RFC 3115 */
    SS_EXT           = 39,  /* 3GPP2 IOS4.2 */
    RU_AUTH_EXT      = 40,  /* 3GPP2 IOS4.2 */
    MN_NAI_EXT       = 131,
    MF_CHALLENGE_EXT = 132, /* RFC 3012 */
    OLD_NVSE_EXT     = 133, /* RFC 3115 */
    NVSE_EXT         = 134, /* RFC 3115 */
    BCMCS_EXT        = 0xb0 /* 3GPP2 A.S0019-A v2.0 */
} MIP_EXTS;


static const value_string a11_ext_types[]= {
    {MH_AUTH_EXT,      "Mobile-Home Authentication Extension"},
    {MF_AUTH_EXT,      "Mobile-Foreign Authentication Extension"},
    {FH_AUTH_EXT,      "Foreign-Home Authentication Extension"},
    {GEN_AUTH_EXT,     "Generalized Mobile-IP Authentication Extension"},
    {OLD_CVSE_EXT,     "Critical Vendor/Organization Specific Extension (OLD)"},
    {CVSE_EXT,         "Critical Vendor/Organization Specific Extension"},
    {SS_EXT,           "Session Specific Extension"},
    {RU_AUTH_EXT,      "Registration Update Authentication Extension"},
    {MN_NAI_EXT,       "Mobile Node NAI Extension"},
    {MF_CHALLENGE_EXT, "MN-FA Challenge Extension"},
    {OLD_NVSE_EXT,     "Normal Vendor/Organization Specific Extension (OLD)"},
    {NVSE_EXT,         "Normal Vendor/Organization Specific Extension"},
    {BCMCS_EXT,        "BCMCS Session Extension"},
    {0, NULL},
};
static value_string_ext a11_ext_types_ext = VALUE_STRING_EXT_INIT(a11_ext_types);

static const value_string a11_ext_stypes[]= {
    {1, "MN AAA Extension"},
    {0, NULL},
};

static const value_string a11_ext_nvose_qosmode[]= {
    {0x00, "QoS Disabled"},
    {0x01, "QoS Enabled"},
    {0, NULL},
};

static const value_string a11_ext_nvose_srvopt[]= {
    {0x0021, "3G High Speed Packet Data"},
    {0x003B, "HRPD Main Service Connection"},
    {0x003C, "Link Layer Assisted Header Removal"},
    {0x003D, "Link Layer Assisted Robust Header Compression"},
    {0x0040, "HRPD Accounting Records Identifier"},                                    /* 3GPP2 A.S0009-C v4.0 */
    {0x0043, "HRPD Packet Data IP Service where Higher Layer Protocol is IP or ROHC"}, /* 3GPP2 A.S0009-C v4.0 */
    {0x0047, "HRPD AltPPP operation"},                                                 /* 3GPP2 A.S0009-C v4.0 */
    {0, NULL},
};

static const value_string a11_ext_nvose_pdsn_code[]= {
    {0xc1, "Connection Release - reason unspecified"},
    {0xc2, "Connection Release - PPP time-out"},
    {0xc3, "Connection Release - registration time-out"},
    {0xc4, "Connection Release - PDSN error"},
    {0xc5, "Connection Release - inter-PCF handoff"},
    {0xc6, "Connection Release - inter-PDSN handoff"},
    {0xc7, "Connection Release - PDSN OAM&P intervention"},
    {0xc8, "Connection Release - accounting error"},
    {0xca, "Connection Release - user (NAI) failed authentication"},
    {0x00, NULL},
};

static const value_string a11_ext_dormant[]= {
    {0x0000, "all MS packet data service instances are dormant"},
    {0, NULL},
};


static const true_false_string a11_tfs_ehrpd_mode = {
    "eAT is operating in evolved mode",
    "eAT is operating in legacy mode"
};

/* 3GPP2 A.S0022-0 v2.0, section 4.2.14 */
static const true_false_string a11_tfs_ehrpd_pmk = {
    "eAT is requesting PMK information",
    "eAT is not requesting PMK information",
};

/* 3GPP2 A.S0022-0 v2.0, section 4.2.14 */
static const true_false_string a11_tfs_ehrpd_handoff_info = {
    "eAT is requesting information for E-UTRAN handoff",
    "eAT is not requesting information for E-UTRAN handoff",
};

/* 3GPP2 A.S0022-0 v2.0, section 4.2.14 */
static const true_false_string a11_tfs_ehrpd_tunnel_mode = {
    "eAT is communicating via tunnel from non-eHRPD",
    "eAT is communicating directly via eHRPD",
};

static const value_string a11_ext_app[]= {
    {0x0101, "Accounting (RADIUS)"},
    {0x0102, "Accounting (DIAMETER)"},
    {0x0201, "Mobility Event Indicator (Mobility)"},
    {0x0301, "Data Available Indicator (Data Ready to Send)"},
    {0x0401, "Access Network Identifiers (ANID)"},
    {0x0501, "PDSN Identifiers (Anchor P-P Address)"},
    {0x0601, "Indicators (All Dormant Indicator)"},
    {0x0602, "Indicators (eHRPD Mode)"},                                                 /* 3GPP2 A.S0022-B v1.0 */
    {0x0603, "Indicators (eHRPD Indicators)"},                                           /* 3GPP2 A.S0009-C v4.0 */
    {0x0701, "PDSN Code (PDSN Code)"},
    {0x0801, "Session Parameter (RN-PDIT:Radio Network Packet Data Inactivity Timer)"},
    {0x0802, "Session Parameter (Always On)"},
    {0x0803, "Session Parameter (QoS Mode)"},
    {0x0901, "Service Option (Service Option Value)"},
    {0x0A01, "PDSN Enabled Features (Flow Control Enabled)"},
    {0x0A02, "PDSN Enabled Features (Packet Boundary Enabled)"},
    {0x0A03, "PDSN Enabled Features (GRE Segmentation Enabled)"},
    {0x0B01, "PCF Enabled Features (Short Data Indication Supported)"},
    {0x0B02, "PCF Enabled Features (GRE Segmentation Enabled)"},
    {0x0C01, "Additional Session Info"},
    {0x0D01, "QoS Information (Forward QoS Information)"},
    {0x0D02, "QoS Information (Reverse QoS Information)"},
    {0x0D03, "QoS Information (Subscriber QoS Profile)"},
    {0x0D04, "QoS Information (Forward Flow Priority Update Information)"},
    {0x0D05, "QoS Information (Reverse Flow Priority Update Information)"},
    {0x0DFE, "QoS Information (Forward QoS Update Information)"},
    {0x0DFF, "QoS Information (Reverse QoS Update Information)"},
    {0x0E01, "Header Compression (ROHC Configuration Parameters)"},
    {0x0F01, "Information (Cause Code)"},
    {0x0F04, "Information (Additional HSGW Information)"},
    {0x1001, "HRPD Indicators (Emergency Services)"},
    {0xB001, "System Identifiers (BSID / HRPD Subnet)"},
    {0, NULL},
};
static value_string_ext a11_ext_app_ext = VALUE_STRING_EXT_INIT(a11_ext_app);

#if 0
static const value_string a11_airlink_types[]= {
    {1, "Session Setup (Y=1)"},
    {2, "Active Start (Y=2)"},
    {3, "Active Stop (Y=3)"},
    {4, "Short Data Burst (Y=4)"},
    {0, NULL},
};
#endif

static const value_string a11_bcmcs_stype_vals[] = {
    {1, "BCMCS Flow and Registration Information"},
    {2, "Session Information"},
    {3, "BCMCS Registration Result"},
    {4, "Enhanced Session Information"},
    {0, NULL},
};

#define A11_MSG_MSID_ELEM_LEN_MAX 8
#define A11_MSG_MSID_LEN_MAX 15



/* XXXX ToDo This should be imported from packet-rohc.h */
static const value_string a11_rohc_profile_vals[] =
{
    { 0x0000,    "ROHC uncompressed" },          /*RFC 5795*/
    { 0x0001,    "ROHC RTP" },                   /*RFC 3095*/
    { 0x0002,    "ROHC UDP" },                   /*RFC 3095*/
    { 0x0003,    "ROHC ESP" },                   /*RFC 3095*/
    { 0x0004,    "ROHC IP" },                    /*RFC 3843*/
    { 0x0005,    "ROHC LLA" },                   /*RFC 3242*/
    { 0x0006,    "ROHC TCP" },                   /*RFC 4996*/
    { 0x0007,    "ROHC RTP/UDP-Lite" },          /*RFC 4019*/
    { 0x0008,    "ROHC UDP-Lite" },              /*RFC 4019*/
    { 0x0101,    "ROHCv2 RTP" },                 /*RFC 5225*/
    { 0x0102,    "ROHCv2 UDP" },                 /*RFC 5225*/
    { 0x0103,    "ROHCv2 ESP" },                 /*RFC 5225*/
    { 0x0104,    "ROHCv2 IP" },                  /*RFC 5225*/
    { 0x0105,    "ROHC LLA with R-mode" },       /*RFC 3408*/
    { 0x0107,    "ROHCv2 RTP/UDP-Lite" },        /*RFC 5225*/
    { 0x0108,    "ROHCv2 UDP-Lite" },            /*RFC 5225*/
    { 0, NULL },
};
static value_string_ext a11_rohc_profile_vals_ext = VALUE_STRING_EXT_INIT(a11_rohc_profile_vals);

/* decode MSID from SSE */

/* MSID is encoded in Binary Coded Decimal format
   First  Byte: [odd-indicator] [Digit 1]
   Second Byte: [Digit 3] [Digit 2]
   ..
   if[odd]
   Last Byte: [Digit N] [Digit N-1]
   else
   Last Byte: [F] [Digit N]
*/


/* 3GPP2 A.S0008-C v4.0, 3GPP2 A.S0019-A v2.0 */
static const value_string a11_ses_msid_type_vals[] =
{
    { 0x0000,    "No Identity Code" },
    { 0x0001,    "MEID" },
    { 0x0005,    "ESN" },
    { 0x0006,    "IMSI" },
    { 0x0008,    "BCMCS Flow ID" },
    { 0, NULL },
};

static int * const a11_flags[] = {
    &hf_a11_s,
    &hf_a11_b,
    &hf_a11_d,
    &hf_a11_m,
    &hf_a11_g,
    &hf_a11_v,
    &hf_a11_t,
    NULL
};

static void
decode_sse(proto_tree *ext_tree, packet_info *pinfo, tvbuff_t *tvb, int offset, unsigned ext_len, proto_item *ext_len_item)
{
    uint8_t     msid_len;
    uint8_t     msid_start_offset;
    uint8_t     msid_num_digits;
    uint8_t     msid_index;
    char       *msid_digits;
    const char *p_msid;
    bool        odd_even_ind;

    /* Decode Protocol Type */
    if (ext_len < 2) {
        expert_add_info_format(pinfo, ext_len_item, &ei_a11_sse_too_short,
                    "Cannot decode Protocol Type - SSE too short");
        return;
    }
    proto_tree_add_item(ext_tree, hf_a11_ses_ptype, tvb, offset, 2, ENC_BIG_ENDIAN);
    offset  += 2;
    ext_len -= 2;

    /* Decode Session Key */
    if (ext_len < 4) {
        expert_add_info_format(pinfo, ext_len_item, &ei_a11_sse_too_short,
                    "Cannot decode Session Key - SSE too short");
        return;
    }
    proto_tree_add_item(ext_tree, hf_a11_ses_key, tvb, offset, 4, ENC_BIG_ENDIAN);
    offset  += 4;
    ext_len -= 4;


    /* Decode Session Id Version */
    if (ext_len < 2) {
        expert_add_info_format(pinfo, ext_len_item, &ei_a11_sse_too_short,
                    "Cannot decode Session Id Version - SSE too short");
        return;
    }
    proto_tree_add_item(ext_tree, hf_a11_ses_sidver, tvb, offset+1, 1, ENC_BIG_ENDIAN);
    offset  += 2;
    ext_len -= 2;


    /* Decode SRID */
    if (ext_len < 2) {
        expert_add_info_format(pinfo, ext_len_item, &ei_a11_sse_too_short,
                    "Cannot decode SRID - SSE too short");
        return;
    }
    proto_tree_add_item(ext_tree, hf_a11_ses_mnsrid, tvb, offset, 2, ENC_BIG_ENDIAN);
    offset  += 2;
    ext_len -= 2;

    /* MSID Type */
    if (ext_len < 2) {
        expert_add_info_format(pinfo, ext_len_item, &ei_a11_sse_too_short,
                    "Cannot decode MSID Type - SSE too short");
        return;
    }
    proto_tree_add_item(ext_tree, hf_a11_ses_msid_type, tvb, offset, 2, ENC_BIG_ENDIAN);
    offset  += 2;
    ext_len -= 2;


    /* MSID Len */
    if (ext_len < 1) {
        expert_add_info_format(pinfo, ext_len_item, &ei_a11_sse_too_short,
                    "Cannot decode MSID Length - SSE too short");
        return;
    }
    msid_len =  tvb_get_uint8(tvb, offset);
    proto_tree_add_item(ext_tree, hf_a11_ses_msid_len, tvb, offset, 1, ENC_BIG_ENDIAN);
    offset  += 1;
    ext_len -= 1;

    /* Decode MSID */
    if (ext_len < msid_len) {
        expert_add_info_format(pinfo, ext_len_item, &ei_a11_sse_too_short,
                    "Cannot decode MSID - SSE too short");
        return;
    }

    msid_digits = (char *)wmem_alloc(pinfo->pool, A11_MSG_MSID_LEN_MAX+2);
    msid_start_offset = offset;

    if (msid_len > A11_MSG_MSID_ELEM_LEN_MAX) {
        p_msid = "MSID is too long";
    } else if (msid_len == 0) {
        p_msid = "MSID is too short";
    } else {
        /* Decode the BCD digits */
        for (msid_index=0; msid_index<msid_len; msid_index++) {
            uint8_t msid_digit = tvb_get_uint8(tvb, offset);
            offset  += 1;
            ext_len -= 1;

            msid_digits[msid_index*2] = (msid_digit & 0x0F) + '0';
            msid_digits[(msid_index*2) + 1] = ((msid_digit & 0xF0) >> 4) + '0';
        }

        odd_even_ind = (msid_digits[0] == '1');

        if (odd_even_ind) {
            msid_num_digits = ((msid_len-1) * 2) + 1;
        } else {
            msid_num_digits = (msid_len-1) * 2;
        }

        msid_digits[msid_num_digits + 1] = '\0';
        p_msid = msid_digits + 1;
    }

    proto_tree_add_string(ext_tree, hf_a11_ses_msid, tvb, msid_start_offset, msid_len, p_msid);
}

static void
decode_bcmcs(proto_tree* ext_tree, packet_info *pinfo, tvbuff_t* tvb, int offset, unsigned ext_len, proto_item *ext_len_item)
{

    uint8_t bc_stype, entry_len;

    /* Decode Protocol Type */
    if (ext_len < 2) {
        expert_add_info_format(pinfo, ext_len_item, &ei_a11_bcmcs_too_short,
                            "Cannot decode Protocol Type - BCMCS too short");
        return;
    }

    bc_stype=tvb_get_uint8(tvb, offset);
    proto_tree_add_item(ext_tree, hf_a11_bcmcs_stype, tvb, offset, 1, ENC_BIG_ENDIAN);
    offset  += 1;
    ext_len -= 1;

    switch (bc_stype) {
    case 1:
    {
        int i = 0;
        proto_tree   *entry_tree;
        while (ext_len > 0) {
            i++;
            entry_len = tvb_get_uint8(tvb, offset);
            if (entry_len == 0) {
                ext_len   -= 1;
                entry_len  = 1;
            } else {
                ext_len = ext_len - entry_len;
            }
            entry_tree = proto_tree_add_subtree_format(ext_tree, tvb, offset, entry_len,
                ett_a11_bcmcs_entry, NULL, "BCMCS Information Entry %u", i);
            proto_tree_add_item(entry_tree, hf_a11_bcmcs_entry_len, tvb, offset, 1, ENC_BIG_ENDIAN);

            proto_tree_add_expert(ext_tree, pinfo, &ei_a11_entry_data_not_dissected, tvb, offset, entry_len -1);
            offset = offset+entry_len;
        }
    }
    break;
    default:
        proto_tree_add_expert_format(ext_tree, pinfo, &ei_a11_session_data_not_dissected, tvb, offset, -1, "Session Data Type %u Not dissected yet", bc_stype);
        return;
    }


}

/* RADIUS attributed */
static void
dissect_a11_radius( tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *tree, int app_len)
{
    proto_tree *radius_tree;

    /* None of this really matters if we don't have a tree */
    if (!tree)
        return;

    /* return if length of extension is not valid */
    if (tvb_reported_length_remaining(tvb, offset)  < 12) {
        return;
    }

    radius_tree = proto_tree_add_subtree(tree, tvb, offset - 2, app_len, ett_a11_radiuses, NULL, "Airlink Record");

    dissect_attribute_value_pairs(radius_tree, pinfo, tvb, offset, app_len-2, NULL);


}

/* X.S0011-005-D v2.0 Service Option Profile */
static const char *
dissect_3gpp2_service_option_profile(proto_tree  *tree, tvbuff_t  *tvb, packet_info *pinfo)
{
    int    offset = 0;
    uint8_t sub_type, sub_type_length;
    proto_item *pi;

    /* Maximum service connections/Link Flows total 32 bit*/
    proto_tree_add_item(tree, hf_a11_serv_opt_prof_max_serv, tvb, offset, 4, ENC_BIG_ENDIAN);
    offset+=4;

    while (tvb_reported_length_remaining(tvb,offset) > 0) {
        sub_type_length = tvb_get_uint8(tvb,offset+1);

        sub_type = tvb_get_uint8(tvb,offset);
        proto_tree_add_item(tree, hf_a11_sub_type, tvb, offset, 1, ENC_BIG_ENDIAN);
        offset += 1;
        pi = proto_tree_add_item(tree, hf_a11_sub_type_length, tvb, offset, 1, ENC_BIG_ENDIAN);
        offset += 1;
        if (sub_type_length < 2) {
            expert_add_info(pinfo, pi, &ei_a11_sub_type_length_not2);
            sub_type_length = 2;
        }
        if (sub_type == 1) {
            proto_tree_add_item(tree, hf_a11_serv_opt, tvb, offset, 1, ENC_BIG_ENDIAN);
            offset += 1;
            /* Max number of service instances of Service Option n */
            proto_tree_add_item(tree, hf_a11_max_num_serv_opt, tvb, offset, 1, ENC_BIG_ENDIAN);
            offset += 1;
        }

        offset = offset + sub_type_length-2;
    }

    return "";

}

static const value_string a11_aut_flow_prof_subtype_vals[] = {
    {0x1, "ProfileID-Forward"},
    {0x2, "ProfileID-Reverse"},
    {0x3, "ProfileID-Bi-direction"},
    {0, NULL},
};

/* X.S0011-005-D v2.0 Authorized Flow Profile IDs for the User */
static const char *
dissect_3gpp2_radius_aut_flow_profile_ids(proto_tree  *tree, tvbuff_t  *tvb, packet_info *pinfo)
{
    proto_tree *sub_tree;
    int         offset = 0;
    proto_item *item;
    uint8_t     sub_type, sub_type_length;
    uint32_t    value;

    while (tvb_reported_length_remaining(tvb,offset) > 0) {
        sub_type = tvb_get_uint8(tvb,offset);
        sub_type_length = tvb_get_uint8(tvb,offset+1);
        /* value is 2 octets */
        value = tvb_get_ntohs(tvb,offset+2);
        sub_tree = proto_tree_add_subtree_format(tree, tvb, offset, sub_type_length, ett_a11_aut_flow_profile_ids, &item,
                                   "%s = %u", val_to_str_const(sub_type, a11_aut_flow_prof_subtype_vals, "Unknown"), value);

        proto_tree_add_item(sub_tree, hf_a11_aut_flow_prof_sub_type, tvb, offset, 1, ENC_BIG_ENDIAN);
        offset += 1;
        item = proto_tree_add_item(sub_tree, hf_a11_aut_flow_prof_sub_type_len, tvb, offset, 1, ENC_BIG_ENDIAN);
        if (sub_type_length < 2) {
            expert_add_info(pinfo, item, &ei_a11_sub_type_length_not2);
            sub_type_length = 2;
        }
        offset += 1;
        proto_tree_add_item(sub_tree, hf_a11_aut_flow_prof_sub_type_value, tvb, offset, 2, ENC_BIG_ENDIAN);

        offset = offset+sub_type_length - 2;
    }

    return "";
}

/* Code to dissect Additional Session Info */
static void
dissect_ase(tvbuff_t *tvb, int offset, unsigned ase_len, proto_tree *ext_tree)
{
    unsigned clen = 0; /* consumed length */

    while (clen < ase_len) {
        proto_tree *exts_tree;
        uint8_t     srid           = tvb_get_uint8(tvb, offset+1);
        uint16_t    service_option = tvb_get_ntohs(tvb,  offset+2);
        uint8_t     entry_length;
        int         entry_start_offset;

        /* Entry Length */
        entry_start_offset = offset;
        entry_length = tvb_get_uint8(tvb, offset);

        if (registration_request_msg && ((service_option == 64) || (service_option == 67)))
            exts_tree = proto_tree_add_subtree_format(ext_tree, tvb, offset, entry_length+1,
                        ett_a11_ase, NULL, "GRE Key Entry (SRID: %d)", srid);
        else
            exts_tree = proto_tree_add_subtree_format(ext_tree, tvb, offset, entry_length,
                        ett_a11_ase, NULL, "GRE Key Entry (SRID: %d)", srid);

        proto_tree_add_item(exts_tree, hf_a11_ase_len_type, tvb, offset, 1, ENC_BIG_ENDIAN);
        offset += 1;

        /* SRID */
        proto_tree_add_item(exts_tree, hf_a11_ase_srid_type, tvb, offset, 1, ENC_BIG_ENDIAN);
        offset += 1;

        /* Service Option */
        proto_tree_add_item(exts_tree, hf_a11_ase_servopt_type, tvb, offset, 2, ENC_BIG_ENDIAN);
        offset += 2;

        /* GRE Protocol Type*/
        proto_tree_add_item(exts_tree, hf_a11_ase_gre_proto_type, tvb, offset, 2, ENC_BIG_ENDIAN);
        offset += 2;

        /* GRE Key */
        proto_tree_add_item(exts_tree, hf_a11_ase_gre_key, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;

        /* PCF IP Address */
        proto_tree_add_item(exts_tree, hf_a11_ase_pcf_addr_key, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;

        if ((entry_length>14)&&(registration_request_msg)) {
            if (service_option == 0x0043) {
                proto_tree *extv_tree;
                uint8_t     profile_count = tvb_get_uint8(tvb, offset+6);
                uint8_t     profile_index = 0;
                uint8_t     reverse_profile_count;

                proto_tree *extt_tree = proto_tree_add_subtree(exts_tree, tvb, offset,6+(profile_count*2)+1,
                                        ett_a11_forward_rohc, NULL, "Forward ROHC Info");

                proto_tree_add_item(extt_tree, hf_a11_ase_forward_rohc_info_len, tvb, offset, 1, ENC_BIG_ENDIAN);
                offset += 1;

                proto_tree_add_item(extt_tree, hf_a11_ase_forward_maxcid, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;
                proto_tree_add_item(extt_tree, hf_a11_ase_forward_mrru, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;
                proto_tree_add_item(extt_tree, hf_a11_ase_forward_large_cids, tvb, offset, 1, ENC_BIG_ENDIAN);
                offset += 1;
                profile_count=tvb_get_uint8(tvb, offset);

                proto_tree_add_item(extt_tree, hf_a11_ase_forward_profile_count, tvb, offset, 1, ENC_BIG_ENDIAN);
                offset += 1;


                for (profile_index=0; profile_index<profile_count; profile_index++) {
                    proto_tree *extu_tree = proto_tree_add_subtree_format(extt_tree, tvb, offset, (2*profile_count),
                                        ett_a11_forward_profile, NULL, "Forward Profile : %d", profile_index);
                    proto_tree_add_item(extu_tree, hf_a11_ase_forward_profile, tvb, offset, 2, ENC_BIG_ENDIAN);
                    offset += 2;
                }/*for*/


                reverse_profile_count=tvb_get_uint8(tvb, offset+6);

                extv_tree = proto_tree_add_subtree(exts_tree, tvb, offset,6+(reverse_profile_count*2)+1,
                            ett_a11_reverse_rohc, NULL, "Reverse ROHC Info");

                proto_tree_add_item(extv_tree, hf_a11_ase_reverse_rohc_info_len, tvb, offset, 1, ENC_BIG_ENDIAN);
                offset += 1;


                proto_tree_add_item(extv_tree, hf_a11_ase_reverse_maxcid, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;
                proto_tree_add_item(extv_tree, hf_a11_ase_reverse_mrru, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;
                proto_tree_add_item(extv_tree, hf_a11_ase_reverse_large_cids, tvb, offset, 1, ENC_BIG_ENDIAN);
                offset += 1;

                profile_count=tvb_get_uint8(tvb, offset);

                proto_tree_add_item(extv_tree, hf_a11_ase_reverse_profile_count, tvb, offset, 1, ENC_BIG_ENDIAN);
                offset += 1;


                for (profile_index=0; profile_index<reverse_profile_count; profile_index++) {
                    proto_tree *extw_tree = proto_tree_add_subtree_format(extv_tree, tvb, offset, (2*profile_count),
                        ett_a11_reverse_profile, NULL, "Reverse Profile : %d", profile_index);

                    proto_tree_add_item(extw_tree, hf_a11_ase_reverse_profile, tvb, offset, 2, ENC_BIG_ENDIAN);
                    offset += 2;
                }/*for*/
            }/* Service option */

        }/* if */
        clen += entry_length + 1;
        /* Set offset = start of next entry in case of padding */
        offset = entry_start_offset + entry_length+1;

    } /* while */

    registration_request_msg =0;
}


#define A11_FQI_IPFLOW_DISC_ENABLED 0x80
#define A11_FQI_DSCP_INCLUDED 0x40

static void
dissect_fwd_qosinfo_flags(tvbuff_t *tvb, int offset, proto_tree *ext_tree, uint8_t *p_dscp_included)
{
    uint8_t flags = tvb_get_uint8(tvb, offset);

    proto_item *ti = proto_tree_add_item(ext_tree, hf_a11_fqi_flags, tvb, offset, 1, ENC_BIG_ENDIAN);
    proto_tree *flags_tree = proto_item_add_subtree(ti, ett_a11_fqi_flags);

    proto_tree_add_item(flags_tree, hf_a11_fqi_flags_ip_flow, tvb, offset, 1, ENC_BIG_ENDIAN);
    proto_tree_add_item(flags_tree, hf_a11_fqi_flags_dscp, tvb, offset, 1, ENC_BIG_ENDIAN);

    if (flags & A11_FQI_DSCP_INCLUDED) {
        *p_dscp_included = 1;
    } else {
        *p_dscp_included = 0;
    }
}

static void
dissect_fqi_entry_flags(tvbuff_t *tvb, int offset, proto_tree *ext_tree, uint8_t dscp_enabled)
{
    proto_item *ti = proto_tree_add_item(ext_tree, hf_a11_fqi_entry_flag, tvb, offset, 1, ENC_BIG_ENDIAN);
    proto_tree *flags_tree = proto_item_add_subtree(ti, ett_a11_fqi_entry_flags);

    if (dscp_enabled) {
        proto_tree_add_item(flags_tree, hf_a11_fqi_entry_flag_dscp, tvb, offset, 1, ENC_BIG_ENDIAN);
    }

    proto_tree_add_item(flags_tree, hf_a11_fqi_entry_flag_flow_state, tvb, offset, 1, ENC_BIG_ENDIAN);
}

static void
dissect_rqi_entry_flags(tvbuff_t *tvb, int offset, proto_tree *ext_tree)
{
    proto_item *ti = proto_tree_add_item(ext_tree, hf_a11_rqi_entry_flag, tvb, offset, 1, ENC_BIG_ENDIAN);
    proto_tree *flags_tree = proto_item_add_subtree(ti, ett_a11_rqi_entry_flags);

    proto_tree_add_item(flags_tree, hf_a11_rqi_entry_flag_flow_state, tvb, offset, 1, ENC_BIG_ENDIAN);
}

/* Code to dissect Forward QoS Info */
static void
dissect_fwd_qosinfo(tvbuff_t *tvb, int offset, proto_tree *ext_tree)
{
    int    clen         = 0;    /* consumed length */
    uint8_t flow_count;
    uint8_t flow_index;
    uint8_t dscp_enabled = 0;

    /* SR Id */
    proto_tree_add_item(ext_tree, hf_a11_fqi_srid, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
    clen++;

    /* Flags */
    dissect_fwd_qosinfo_flags(tvb, offset+clen, ext_tree, &dscp_enabled);
    clen++;

    /* Flow Count */
    flow_count = tvb_get_uint8(tvb, offset+clen);
    flow_count &= 0x1F;
    proto_tree_add_item(ext_tree, hf_a11_fqi_flowcount, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
    clen++;

    for (flow_index=0; flow_index<flow_count; flow_index++) {
        uint8_t requested_qos_len = 0;
        uint8_t granted_qos_len   = 0;

        uint8_t entry_len = tvb_get_uint8(tvb, offset+clen);
        uint8_t flow_id   = tvb_get_uint8(tvb, offset+clen+1);

        proto_tree *flow_tree = proto_tree_add_subtree_format(ext_tree, tvb, offset+clen,
            entry_len+1, ett_a11_fqi_flowentry, NULL, "Forward Flow Entry (Flow Id: %d)", flow_id);

        /* Entry Length */
        proto_tree_add_item(flow_tree, hf_a11_fqi_entrylen, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
        clen++;

        /* Flow Id */
        proto_tree_add_item(flow_tree, hf_a11_fqi_flowid, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
        clen++;

        /* DSCP and Flow State*/
        dissect_fqi_entry_flags(tvb, offset+clen, flow_tree, dscp_enabled);
        clen++;


        /* Requested QoS Length */
        requested_qos_len = tvb_get_uint8(tvb, offset+clen);
        proto_tree_add_item(flow_tree, hf_a11_fqi_requested_qoslen, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
        clen++;

        /* Requested QoS Blob */
        if (requested_qos_len) {
            proto_tree *exts_tree2;

            proto_tree *exts_tree1 = proto_tree_add_subtree(flow_tree, tvb, offset+clen,requested_qos_len,
                                ett_a11_fqi_requestedqos, NULL, "Forward Requested QoS ");

            /* Flow Priority */
            proto_tree_add_item(exts_tree1, hf_a11_fqi_flow_priority, tvb,offset+clen , 1, ENC_BIG_ENDIAN);

            /*  Num of QoS attribute sets */
            proto_tree_add_item(exts_tree1, hf_a11_fqi_num_qos_attribute_set, tvb, offset+clen, 1, ENC_BIG_ENDIAN);

            /* QoS attribute set length */
            proto_tree_add_item(exts_tree1, hf_a11_fqi_qos_attribute_setlen, tvb, offset+clen, 2, ENC_BIG_ENDIAN);
            clen++;

            /* QoS attribute set */
            exts_tree2 = proto_tree_add_subtree(exts_tree1, tvb, offset+clen, 4, ett_a11_fqi_qos_attribute_set,
                                                NULL, "QoS Attribute Set");

            /* QoS attribute setid */
            proto_tree_add_item(exts_tree2, hf_a11_fqi_qos_attribute_setid, tvb, offset+clen, 2, ENC_BIG_ENDIAN);
            clen++;

            /* verbose */
            proto_tree_add_item(exts_tree2, hf_a11_fqi_verbose, tvb,offset+clen, 1, ENC_BIG_ENDIAN);

            /* Flow profile id */
            proto_tree_add_item(exts_tree2, hf_a11_fqi_flow_profileid, tvb, offset+clen, 3, ENC_BIG_ENDIAN);
            clen += 3;

        }

        /* Granted QoS Length */
        granted_qos_len = tvb_get_uint8(tvb, offset+clen);
        proto_tree_add_item(flow_tree, hf_a11_fqi_granted_qoslen, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
        clen++;

        /* Granted QoS Blob */
        if (granted_qos_len) {
            proto_tree *exts_tree3;

            exts_tree3 = proto_tree_add_subtree(flow_tree, tvb, offset+clen, granted_qos_len,
                        ett_a11_fqi_grantedqos, NULL, "Forward Granted QoS ");

            /* QoS attribute setid */
            proto_tree_add_item(exts_tree3, hf_a11_fqi_qos_granted_attribute_setid, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
            clen++;
        }
    } /* for (flow_index...) */
}

/* Code to dissect Reverse QoS Info */
static void
dissect_rev_qosinfo(tvbuff_t *tvb, int offset, proto_tree *ext_tree)
{
    int    clen = 0;            /* consumed length */
    uint8_t flow_count;
    uint8_t flow_index;

    /* SR Id */
    proto_tree_add_item(ext_tree, hf_a11_rqi_srid, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
    clen++;

    /* Flow Count */
    flow_count = tvb_get_uint8(tvb, offset+clen);
    flow_count &= 0x1F;
    proto_tree_add_item(ext_tree, hf_a11_rqi_flowcount, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
    clen++;

    for (flow_index=0; flow_index<flow_count; flow_index++) {
        uint8_t requested_qos_len;
        uint8_t granted_qos_len;

        uint8_t entry_len = tvb_get_uint8(tvb, offset+clen);
        uint8_t flow_id   = tvb_get_uint8(tvb, offset+clen+1);

        proto_tree *flow_tree = proto_tree_add_subtree_format
            (ext_tree, tvb, offset+clen, entry_len+1, ett_a11_rqi_flowentry, NULL,
            "Reverse Flow Entry (Flow Id: %d)", flow_id);

        /* Entry Length */
        proto_tree_add_item(flow_tree, hf_a11_rqi_entrylen, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
        clen++;

        /* Flow Id */
        proto_tree_add_item(flow_tree, hf_a11_rqi_flowid, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
        clen++;

        /* Flags */
        dissect_rqi_entry_flags(tvb, offset+clen, flow_tree);
        clen++;

        /* Requested QoS Length */
        requested_qos_len = tvb_get_uint8(tvb, offset+clen);
        proto_tree_add_item(flow_tree, hf_a11_rqi_requested_qoslen, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
        clen++;

        /* Requested QoS Blob */
        if (requested_qos_len) {
            proto_tree *exts_tree1, *exts_tree2;

            exts_tree1 = proto_tree_add_subtree(flow_tree, tvb, offset+clen,requested_qos_len,
                        ett_a11_rqi_requestedqos, NULL, "Reverse Requested QoS ");

            /* Flow Priority */
            proto_tree_add_item(exts_tree1, hf_a11_rqi_flow_priority, tvb,offset+clen , 1, ENC_BIG_ENDIAN);

            /*  Num of QoS attribute sets */
            proto_tree_add_item(exts_tree1, hf_a11_rqi_num_qos_attribute_set, tvb, offset+clen, 1, ENC_BIG_ENDIAN);

            /* QoS attribute set length */
            proto_tree_add_item(exts_tree1, hf_a11_rqi_qos_attribute_setlen, tvb, offset+clen, 2, ENC_BIG_ENDIAN);
            clen++;

            /* QoS attribute set */
            exts_tree2 = proto_tree_add_subtree(exts_tree1, tvb, offset+clen, 4,
                                                ett_a11_rqi_qos_attribute_set, NULL, "QoS Attribute Set");

            /* QoS attribute setid */
            proto_tree_add_item(exts_tree2, hf_a11_rqi_qos_attribute_setid, tvb, offset+clen, 2, ENC_BIG_ENDIAN);
            clen++;

            /* verbose */
            proto_tree_add_item(exts_tree2, hf_a11_rqi_verbose, tvb,offset+clen, 1, ENC_BIG_ENDIAN);

            /* Flow profile id */
            proto_tree_add_item(exts_tree2, hf_a11_rqi_flow_profileid, tvb, offset+clen, 3, ENC_BIG_ENDIAN);
            clen += 3;
        }

        /* Granted QoS Length */
        granted_qos_len = tvb_get_uint8(tvb, offset+clen);
        proto_tree_add_item(flow_tree, hf_a11_rqi_granted_qoslen, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
        clen++;

        /* Granted QoS Blob */
        if (granted_qos_len) {
            proto_tree *exts_tree3;

            exts_tree3 = proto_tree_add_subtree(flow_tree, tvb, offset+clen,granted_qos_len,
                                        ett_a11_rqi_grantedqos, NULL, "Reverse Granted QoS ");

            /* QoS attribute setid */
            proto_tree_add_item(exts_tree3, hf_a11_rqi_qos_granted_attribute_setid, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
            clen++;
        }
    }
}


/* Code to dissect Subscriber QoS Profile */
static void
dissect_subscriber_qos_profile(tvbuff_t *tvb, packet_info *pinfo, int offset, int ext_len, proto_tree *ext_tree)
{
    proto_tree *exts_tree;

    int qos_profile_len = ext_len;

    exts_tree =
        proto_tree_add_subtree_format(ext_tree, tvb, offset, 0, ett_a11_subscriber_profile, NULL,
                             "Subscriber Qos Profile (%d bytes)",
                             qos_profile_len);

    /* Subscriber QoS profile */
    if (qos_profile_len) {
        proto_tree_add_item
            (exts_tree,  hf_a11_subscriber_profile, tvb, offset,
             qos_profile_len, ENC_NA);

        dissect_attribute_value_pairs(exts_tree, pinfo, tvb, offset, qos_profile_len, NULL);
    }
}

/* Code to dissect Forward QoS Update Info */
static void
dissect_fwd_qosupdate_info(tvbuff_t *tvb, int offset, proto_tree *ext_tree)
{
    int    clen = 0;            /* consumed length */
    uint8_t flow_count;
    uint8_t flow_index;

    /* Flow Count */
    flow_count = tvb_get_uint8(tvb, offset+clen);
    proto_tree_add_item(ext_tree, hf_a11_fqui_flowcount, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
    clen++;

    for (flow_index=0; flow_index<flow_count; flow_index++) {
        proto_tree *exts_tree;
        uint8_t granted_qos_len;

        uint8_t flow_id = tvb_get_uint8(tvb, offset+clen);

        exts_tree = proto_tree_add_subtree_format
            (ext_tree, tvb, offset+clen, 1, ett_a11_fqui_flowentry, NULL,
            "Forward Flow Entry (Flow Id: %d)", flow_id);

        clen++;

        /* Forward QoS Sub Blob Length */
        granted_qos_len = tvb_get_uint8(tvb, offset+clen);
        proto_tree_add_item
            (exts_tree, hf_a11_fqui_updated_qoslen, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
        clen++;

        /* Forward QoS Sub Blob */
        if (granted_qos_len) {
            proto_tree_add_item
                (exts_tree, hf_a11_fqui_updated_qos, tvb, offset+clen,
                 granted_qos_len, ENC_NA);
            clen += granted_qos_len;
        }
    }
}


/* Code to dissect Reverse QoS Update Info */
static void
dissect_rev_qosupdate_info(tvbuff_t *tvb, int offset, proto_tree *ext_tree)
{
    int    clen = 0;            /* consumed length */
    uint8_t flow_count;
    uint8_t flow_index;

    /* Flow Count */
    flow_count = tvb_get_uint8(tvb, offset+clen);
    proto_tree_add_item(ext_tree, hf_a11_rqui_flowcount, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
    clen++;

    for (flow_index=0; flow_index<flow_count; flow_index++) {
        proto_tree *exts_tree;
        uint8_t     granted_qos_len;

        uint8_t     flow_id = tvb_get_uint8(tvb, offset+clen);

        exts_tree = proto_tree_add_subtree_format
            (ext_tree, tvb, offset+clen, 1, ett_a11_rqui_flowentry, NULL,
                    "Reverse Flow Entry (Flow Id: %d)", flow_id);
        clen++;

        /* Reverse QoS Sub Blob Length */
        granted_qos_len = tvb_get_uint8(tvb, offset+clen);
        proto_tree_add_item
            (exts_tree, hf_a11_rqui_updated_qoslen, tvb, offset+clen, 1, ENC_BIG_ENDIAN);
        clen++;

        /* Reverse QoS Sub Blob */
        if (granted_qos_len) {
            proto_tree_add_item
                (exts_tree, hf_a11_rqui_updated_qos, tvb, offset+clen,
                 granted_qos_len, ENC_NA);
            clen += granted_qos_len;
        }
    }
}

/* Code to dissect extensions */
static void
dissect_a11_extensions( tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *tree)
{
    proto_tree *exts_tree;
    proto_tree *ext_tree;
    proto_item *ext_len_item = NULL;
    unsigned    ext_len;
    uint8_t     ext_type;
    uint8_t     ext_subtype = 0;
    unsigned    hdrLen;

    int16_t     apptype = -1;

    /* Add our tree, if we have extensions */
    exts_tree = proto_tree_add_subtree(tree, tvb, offset, -1, ett_a11_exts, NULL, "Extensions");

    /* And, handle each extension */
    while (tvb_reported_length_remaining(tvb, offset) > 0) {

        /* Get our extension info */
        ext_type = tvb_get_uint8(tvb, offset);
        if (ext_type == GEN_AUTH_EXT) {
            /*
             * Very nasty . . breaks normal extensions, since the length is
             * in the wrong place :(
             */
            ext_subtype = tvb_get_uint8(tvb, offset + 1);
            ext_len = tvb_get_ntohs(tvb, offset + 2);
            hdrLen  = 4;
        } else if ((ext_type == CVSE_EXT) || (ext_type == OLD_CVSE_EXT)) {
            ext_len = tvb_get_ntohs(tvb, offset + 2);
            ext_subtype = tvb_get_uint8(tvb, offset + 8);
            hdrLen = 4;
        } else {
            ext_len = tvb_get_uint8(tvb, offset + 1);
            hdrLen  = 2;
        }

        ext_tree = proto_tree_add_subtree_format(exts_tree, tvb, offset, ext_len + hdrLen,
                                 ett_a11_ext, NULL, "Extension: %s",
                                 val_to_str_ext(ext_type, &a11_ext_types_ext,
                                            "Unknown Extension %u"));

        proto_tree_add_uint(ext_tree, hf_a11_ext_type, tvb, offset, 1, ext_type);
        offset += 1;

        if (ext_type == SS_EXT) {
            ext_len_item = proto_tree_add_uint(ext_tree, hf_a11_ext_len, tvb, offset, 1, ext_len);
            offset += 1;
        }
        else if ((ext_type == CVSE_EXT) || (ext_type == OLD_CVSE_EXT)) {
            offset += 1;
            ext_len_item = proto_tree_add_uint(ext_tree, hf_a11_ext_len, tvb, offset, 2, ext_len);
            offset += 2;
        }
        else if (ext_type != GEN_AUTH_EXT) {
            /* Another nasty hack since GEN_AUTH_EXT broke everything */
            ext_len_item = proto_tree_add_uint(ext_tree, hf_a11_ext_len, tvb, offset, 1, ext_len);
            offset += 1;
        }

        switch (ext_type) {
        case SS_EXT:
            decode_sse(ext_tree, pinfo, tvb, offset, ext_len, ext_len_item);
            offset += ext_len;
            ext_len = 0;
            break;

        case MH_AUTH_EXT:
        case MF_AUTH_EXT:
        case FH_AUTH_EXT:
        case RU_AUTH_EXT:
            /* All these extensions look the same.  4 byte SPI followed by a key */
            if (ext_len < 4)
                break;
            proto_tree_add_item(ext_tree, hf_a11_aext_spi, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset  += 4;
            ext_len -= 4;
            if (ext_len == 0)
                break;
            proto_tree_add_item(ext_tree, hf_a11_aext_auth, tvb, offset, ext_len,
                                ENC_NA);
            break;
        case MN_NAI_EXT:
            if (ext_len == 0)
                break;
            /*
             * RFC 2486 speaks only of ASCII; RFC 4282 expands that to
             * UTF-8.
             */
            proto_tree_add_item(ext_tree, hf_a11_next_nai, tvb, offset,
                                ext_len, ENC_UTF_8);
            break;

        case GEN_AUTH_EXT:      /* RFC 3012 */
            /*
             * Very nasty . . breaks normal extensions, since the length is
             * in the wrong place :(
             */
            proto_tree_add_uint(ext_tree, hf_a11_ext_stype, tvb, offset, 1, ext_subtype);
            offset += 1;
            proto_tree_add_uint(ext_tree, hf_a11_ext_len, tvb, offset, 2, ext_len);
            offset += 2;
            /* SPI */
            if (ext_len < 4)
                break;
            proto_tree_add_item(ext_tree, hf_a11_aext_spi, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset  += 4;
            ext_len -= 4;
            /* Key */
            if (ext_len == 0)
                break;
            proto_tree_add_item(ext_tree, hf_a11_aext_auth, tvb, offset,
                                ext_len, ENC_NA);

            break;
        case OLD_CVSE_EXT:      /* RFC 3115 */
        case CVSE_EXT:          /* RFC 3115 */
            if (ext_len < 4)
                break;
            proto_tree_add_item(ext_tree, hf_a11_vse_vid, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset  += 4;
            ext_len -= 4;
            if (ext_len < 2)
                break;
            apptype = tvb_get_ntohs(tvb, offset);
            proto_tree_add_uint(ext_tree, hf_a11_vse_apptype, tvb, offset, 2, apptype);
            offset  += 2;
            ext_len -= 2;
            if (apptype == 0x0101) {
                if (tvb_reported_length_remaining(tvb, offset) > 0) {
                    dissect_a11_radius(tvb, pinfo, offset, ext_tree, ext_len + 2);
                }
            }
            break;
        case OLD_NVSE_EXT:      /* RFC 3115 */
        case NVSE_EXT:          /* RFC 3115 */
            if (ext_len < 6)
                break;
            proto_tree_add_item(ext_tree, hf_a11_vse_vid, tvb, offset+2, 4, ENC_BIG_ENDIAN);
            offset  += 6;
            ext_len -= 6;
            proto_tree_add_item(ext_tree, hf_a11_vse_apptype, tvb, offset, 2, ENC_BIG_ENDIAN);

            if (ext_len < 2)
                break;
            apptype = tvb_get_ntohs(tvb, offset);
            offset  += 2;
            ext_len -= 2;
            switch (apptype) {
            case 0x0401:
                if (ext_len < 5)
                    break;
                proto_tree_add_item(ext_tree, hf_a11_vse_panid, tvb, offset, 5, ENC_NA);
                offset  += 5;
                ext_len -= 5;
                if (ext_len < 5)
                    break;
                proto_tree_add_item(ext_tree, hf_a11_vse_canid, tvb, offset, 5, ENC_NA);
                break;
            case 0x0501:
                if (ext_len < 4)
                    break;
                proto_tree_add_item(ext_tree, hf_a11_vse_ppaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
                break;
            case 0x0601:
                if (ext_len < 2)
                    break;
                proto_tree_add_item(ext_tree, hf_a11_vse_dormant, tvb, offset, 2, ENC_BIG_ENDIAN);
                break;
            case 0x0602:
                /* eHRPD Mode */
                if (ext_len < 1)
                    break;
                proto_tree_add_item(ext_tree, hf_a11_vse_ehrpd_mode, tvb, offset, 1, ENC_BIG_ENDIAN);
                break;
            case 0x0603:
                /* eHRPD Indicators */
                if (ext_len < 1)
                    break;
                proto_tree_add_item(ext_tree, hf_a11_vse_ehrpd_pmk, tvb, offset, 1, ENC_BIG_ENDIAN);
                proto_tree_add_item(ext_tree, hf_a11_vse_ehrpd_handoff_info, tvb, offset, 1, ENC_BIG_ENDIAN);
                proto_tree_add_item(ext_tree, hf_a11_vse_ehrpd_tunnel_mode, tvb, offset, 1, ENC_BIG_ENDIAN);
                break;
            case 0x0701:
                if (ext_len < 1)
                    break;
                proto_tree_add_item(ext_tree, hf_a11_vse_code, tvb, offset, 1, ENC_BIG_ENDIAN);
                break;
            case 0x0801:
                if (ext_len < 1)
                    break;
                proto_tree_add_item(ext_tree, hf_a11_vse_pdit, tvb, offset, 1, ENC_BIG_ENDIAN);
                break;
            case 0x0802:
                proto_tree_add_item(ext_tree, hf_a11_vse_session_parameter, tvb, offset, -1, ENC_NA);
                break;
            case 0x0803:
                proto_tree_add_item(ext_tree, hf_a11_vse_qosmode, tvb, offset, 1, ENC_BIG_ENDIAN);
                break;
            case 0x0901:
                if (ext_len < 2)
                    break;
                proto_tree_add_item(ext_tree, hf_a11_vse_srvopt, tvb, offset, 2, ENC_BIG_ENDIAN);
                break;
            case 0x0C01:
                dissect_ase(tvb, offset, ext_len, ext_tree);
                break;
            case 0x0D01:
                dissect_fwd_qosinfo(tvb, offset, ext_tree);
                break;
            case 0x0D02:
                dissect_rev_qosinfo(tvb, offset, ext_tree);
                break;
            case 0x0D03:
                dissect_subscriber_qos_profile(tvb, pinfo, offset, ext_len, ext_tree);
                break;
            case 0x0DFE:
                dissect_fwd_qosupdate_info(tvb, offset, ext_tree);
                break;
            case 0x0DFF:
                dissect_rev_qosupdate_info(tvb, offset, ext_tree);
                break;
            }

            break;
        case BCMCS_EXT:
            decode_bcmcs(ext_tree, pinfo, tvb, offset, ext_len, ext_len_item);
            offset += ext_len;
            ext_len = 0;
            break;
        case MF_CHALLENGE_EXT:  /* RFC 3012 */
            /* The default dissector is good here.  The challenge is all hex anyway. */
        default:
            proto_tree_add_item(ext_tree, hf_a11_ext, tvb, offset, ext_len, ENC_NA);
            break;
        } /* ext type */

        offset += ext_len;
    } /* while data remaining */

} /* dissect_a11_extensions */

/* Code to actually dissect the packets */
static int
dissect_a11( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
    /* Set up structures we will need to add the protocol subtree and manage it */
    proto_item *ti;
    proto_tree *a11_tree = NULL;
    uint8_t     type;
    unsigned    offset   = 0;

    if (!tvb_bytes_exist(tvb, offset, 1))
        return 0;       /* not enough data to check message type */

    type = tvb_get_uint8(tvb, offset);
    if (try_val_to_str_ext(type, &a11_types_ext) == NULL)
        return 0;       /* not a known message type */

    /* Make entries in Protocol column and Info column on summary display */

    col_set_str(pinfo->cinfo, COL_PROTOCOL, "3GPP2 A11");
    col_clear(pinfo->cinfo, COL_INFO);

    if (type == REGISTRATION_REQUEST)
        registration_request_msg =1;
    else
        registration_request_msg =0;


    switch (type) {
    case REGISTRATION_REQUEST:

        registration_request_msg = 1;
        col_add_fstr(pinfo->cinfo, COL_INFO, "Reg Request: PDSN=%s PCF=%s",
                     tvb_ip_to_str(pinfo->pool, tvb, 8),
                     tvb_ip_to_str(pinfo->pool, tvb, 12));

        if (tree) {
            ti = proto_tree_add_item(tree, proto_a11, tvb, offset, -1, ENC_NA);
            a11_tree = proto_item_add_subtree(ti, ett_a11);

            /* type */
            proto_tree_add_uint(a11_tree, hf_a11_type, tvb, offset, 1, type);
            offset += 1;

            /* flags */
            proto_tree_add_bitmask(a11_tree, tvb, offset, hf_a11_flags,
                                   ett_a11_flags, a11_flags, ENC_NA);
            offset += 1;

            /* lifetime */
            proto_tree_add_item(a11_tree, hf_a11_life, tvb, offset, 2, ENC_BIG_ENDIAN);
            offset +=2;

            /* home address */
            proto_tree_add_item(a11_tree, hf_a11_homeaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* home agent address */
            proto_tree_add_item(a11_tree, hf_a11_haaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Care of Address */
            proto_tree_add_item(a11_tree, hf_a11_coa, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Identifier - assumed to be an NTP time here */
            proto_tree_add_item(a11_tree, hf_a11_ident, tvb, offset, 8, ENC_TIME_NTP|ENC_BIG_ENDIAN);
            offset += 8;

        } /* if tree */
        break;
    case REGISTRATION_REPLY:
        col_add_fstr(pinfo->cinfo, COL_INFO, "Reg Reply:   PDSN=%s, Code=%u",
                      tvb_ip_to_str(pinfo->pool, tvb, 8), tvb_get_uint8(tvb,1));

        if (tree) {
            /* Add Subtree */
            ti = proto_tree_add_item(tree, proto_a11, tvb, offset, -1, ENC_NA);
            a11_tree = proto_item_add_subtree(ti, ett_a11);

            /* Type */
            proto_tree_add_uint(a11_tree, hf_a11_type, tvb, offset, 1, type);
            offset += 1;

            /* Reply Code */
            proto_tree_add_item(a11_tree, hf_a11_code, tvb, offset, 1, ENC_BIG_ENDIAN);
            offset += 1;

            /* Registration Lifetime */
            proto_tree_add_item(a11_tree, hf_a11_life, tvb, offset, 2, ENC_BIG_ENDIAN);
            offset += 2;

            /* Home address */
            proto_tree_add_item(a11_tree, hf_a11_homeaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Home Agent Address */
            proto_tree_add_item(a11_tree, hf_a11_haaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Identifier - assumed to be an NTP time here */
            proto_tree_add_item(a11_tree, hf_a11_ident, tvb, offset, 8, ENC_TIME_NTP|ENC_BIG_ENDIAN);
            offset += 8;
        } /* if tree */

        break;
    case REGISTRATION_UPDATE:
        col_add_fstr(pinfo->cinfo, COL_INFO,"Reg Update:  PDSN=%s",
                     tvb_ip_to_str(pinfo->pool, tvb, 8));
        if (tree) {
            /* Add Subtree */
            ti = proto_tree_add_item(tree, proto_a11, tvb, offset, -1, ENC_NA);
            a11_tree = proto_item_add_subtree(ti, ett_a11);

            /* Type */
            proto_tree_add_uint(a11_tree, hf_a11_type, tvb, offset, 1, type);
            offset += 1;

            /* Reserved */
            offset += 3;

            /* Home address */
            proto_tree_add_item(a11_tree, hf_a11_homeaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Home Agent Address */
            proto_tree_add_item(a11_tree, hf_a11_haaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Identifier - assumed to be an NTP time here */
            proto_tree_add_item(a11_tree, hf_a11_ident, tvb, offset, 8, ENC_TIME_NTP|ENC_BIG_ENDIAN);
            offset += 8;

        } /* if tree */
        break;
    case REGISTRATION_ACK:
        col_add_fstr(pinfo->cinfo, COL_INFO, "Reg Ack:     PCF=%s Status=%u",
                     tvb_ip_to_str(pinfo->pool, tvb, 8),
                     tvb_get_uint8(tvb,3));
        if (tree) {
            /* Add Subtree */
            ti = proto_tree_add_item(tree, proto_a11, tvb, offset, -1, ENC_NA);
            a11_tree = proto_item_add_subtree(ti, ett_a11);

            /* Type */
            proto_tree_add_uint(a11_tree, hf_a11_type, tvb, offset, 1, type);
            offset += 1;

            /* Reserved */
            offset += 2;

            /* Ack Status */
            proto_tree_add_item(a11_tree, hf_a11_status, tvb, offset, 1, ENC_BIG_ENDIAN);
            offset += 1;

            /* Home address */
            proto_tree_add_item(a11_tree, hf_a11_homeaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Care of Address */
            proto_tree_add_item(a11_tree, hf_a11_coa, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Identifier - assumed to be an NTP time here */
            proto_tree_add_item(a11_tree, hf_a11_ident, tvb, offset, 8, ENC_TIME_NTP|ENC_BIG_ENDIAN);
            offset += 8;

        } /* if tree */
        break;
    case SESSION_UPDATE: /* IOS4.3 */
        col_add_fstr(pinfo->cinfo, COL_INFO,"Ses Update:  PDSN=%s",
                     tvb_ip_to_str(pinfo->pool, tvb, 8));
        if (tree) {
            /* Add Subtree */
            ti = proto_tree_add_item(tree, proto_a11, tvb, offset, -1, ENC_NA);
            a11_tree = proto_item_add_subtree(ti, ett_a11);

            /* Type */
            proto_tree_add_uint(a11_tree, hf_a11_type, tvb, offset, 1, type);
            offset += 1;

            /* Reserved */
            offset += 3;

            /* Home address */
            proto_tree_add_item(a11_tree, hf_a11_homeaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Home Agent Address */
            proto_tree_add_item(a11_tree, hf_a11_haaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Identifier - assumed to be an NTP time here */
            proto_tree_add_item(a11_tree, hf_a11_ident, tvb, offset, 8, ENC_TIME_NTP|ENC_BIG_ENDIAN);
            offset += 8;

        } /* if tree */
        break;
    case SESSION_ACK: /* IOS4.3 */
        col_add_fstr(pinfo->cinfo, COL_INFO, "Ses Upd Ack: PCF=%s, Status=%u",
                     tvb_ip_to_str(pinfo->pool, tvb, 8),
                     tvb_get_uint8(tvb,3));
        if (tree) {
            /* Add Subtree */
            ti = proto_tree_add_item(tree, proto_a11, tvb, offset, -1, ENC_NA);
            a11_tree = proto_item_add_subtree(ti, ett_a11);

            /* Type */
            proto_tree_add_uint(a11_tree, hf_a11_type, tvb, offset, 1, type);
            offset += 1;

            /* Reserved */
            offset += 2;

            /* Ack Status */
            proto_tree_add_item(a11_tree, hf_a11_status, tvb, offset, 1, ENC_BIG_ENDIAN);
            offset += 1;

            /* Home address */
            proto_tree_add_item(a11_tree, hf_a11_homeaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Care of Address */
            proto_tree_add_item(a11_tree, hf_a11_coa, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Identifier - assumed to be an NTP time here */
            proto_tree_add_item(a11_tree, hf_a11_ident, tvb, offset, 8, ENC_TIME_NTP|ENC_BIG_ENDIAN);
            offset += 8;

        } /* if tree */
        break;
    case CAPABILITIES_INFO: /* IOS5.1 */
        col_add_fstr(pinfo->cinfo, COL_INFO, "Cap Info: PDSN=%s, PCF=%s",
                     tvb_ip_to_str(pinfo->pool, tvb, 8),
                     tvb_ip_to_str(pinfo->pool, tvb, 12));
        if (tree) {
            /* Add Subtree */
            ti = proto_tree_add_item(tree, proto_a11, tvb, offset, -1, ENC_NA);
            a11_tree = proto_item_add_subtree(ti, ett_a11);

            /* Type */
            proto_tree_add_uint(a11_tree, hf_a11_type, tvb, offset, 1, type);
            offset += 1;

            /* Reserved */
            offset += 3;

            /* Home address */
            proto_tree_add_item(a11_tree, hf_a11_homeaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Home Agent Address */
            proto_tree_add_item(a11_tree, hf_a11_haaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Care of Address */
            proto_tree_add_item(a11_tree, hf_a11_coa, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Identifier - assumed to be an NTP time here */
            proto_tree_add_item(a11_tree, hf_a11_ident, tvb, offset, 8, ENC_TIME_NTP|ENC_BIG_ENDIAN);
            offset += 8;

        } /* if tree */
        break;
    case CAPABILITIES_INFO_ACK: /* IOS5.1 */
        col_add_fstr(pinfo->cinfo, COL_INFO, "Cap Info Ack: PCF=%s",
                     tvb_ip_to_str(pinfo->pool, tvb, 8));
        if (tree) {
            /* Add Subtree */
            ti = proto_tree_add_item(tree, proto_a11, tvb, offset, -1, ENC_NA);
            a11_tree = proto_item_add_subtree(ti, ett_a11);

            /* Type */
            proto_tree_add_uint(a11_tree, hf_a11_type, tvb, offset, 1, type);
            offset += 1;

            /* Reserved */
            offset += 3;

            /* Home address */
            proto_tree_add_item(a11_tree, hf_a11_homeaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Care of Address */
            proto_tree_add_item(a11_tree, hf_a11_coa, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Identifier - assumed to be an NTP time here */
            proto_tree_add_item(a11_tree, hf_a11_ident, tvb, offset, 8, ENC_TIME_NTP|ENC_BIG_ENDIAN);
            offset += 8;

        } /* if tree */
        break;
    case BC_SERVICE_REQUEST:
        col_add_fstr(pinfo->cinfo, COL_INFO, "Service Request: PCF=%s ",
            tvb_ip_to_str(pinfo->pool, tvb, offset + 8));

        if (tree) {
            ti = proto_tree_add_item(tree, proto_a11, tvb, offset, -1, ENC_NA);
            a11_tree = proto_item_add_subtree(ti, ett_a11);

            /* type */
            proto_tree_add_uint(a11_tree, hf_a11_type, tvb, offset, 1, type);
            offset += 4;

            /* home address */
            proto_tree_add_item(a11_tree, hf_a11_homeaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Care-of-Address */
            proto_tree_add_item(a11_tree, hf_a11_coa, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Identifier - assumed to be an NTP time here */
            proto_tree_add_item(a11_tree, hf_a11_ident, tvb, offset, 8, ENC_TIME_NTP|ENC_BIG_ENDIAN);
            offset += 8;

        } /* if tree */
        break;

    case BC_SERVICE_REPLY:
       col_add_fstr(pinfo->cinfo, COL_INFO, "Service Response: BSN=%s ",
            tvb_ip_to_str(pinfo->pool, tvb, offset + 8));

       if (tree) {
           ti = proto_tree_add_item(tree, proto_a11, tvb, offset, -1, ENC_NA);
           a11_tree = proto_item_add_subtree(ti, ett_a11);

           /* type */
           proto_tree_add_uint(a11_tree, hf_a11_type, tvb, offset, 1, type);
           offset += 3;

           /* Reply Code */
           proto_tree_add_item(a11_tree, hf_a11_code, tvb, offset, 1, ENC_BIG_ENDIAN);
           offset += 1;

           /* home address */
           proto_tree_add_item(a11_tree, hf_a11_homeaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
           offset += 4;

           /* Home Agent */
           proto_tree_add_item(a11_tree, hf_a11_haaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
           offset += 4;

           /* Identifier - assumed to be an NTP time here */
           proto_tree_add_item(a11_tree, hf_a11_ident, tvb, offset, 8, ENC_TIME_NTP|ENC_BIG_ENDIAN);
           offset += 8;

       } /* if tree */
       break;
       case BC_REGISTRATION_REQUEST:
           col_add_fstr(pinfo->cinfo, COL_INFO, "BC Reg Request: BSN=%s ",
            tvb_ip_to_str(pinfo->pool, tvb, offset + 8));

           if (tree) {
               ti = proto_tree_add_item(tree, proto_a11, tvb, offset, -1, ENC_NA);
               a11_tree = proto_item_add_subtree(ti, ett_a11);

               /* type */
               proto_tree_add_uint(a11_tree, hf_a11_type, tvb, offset, 1, type);
               offset += 1;

               /* flags */
               proto_tree_add_bitmask(a11_tree, tvb, offset, hf_a11_flags,
                                      ett_a11_flags, a11_flags, ENC_NA);
               offset += 1;

               /* lifetime */
               proto_tree_add_item(a11_tree, hf_a11_life, tvb, offset, 2, ENC_BIG_ENDIAN);
               offset +=2;

               /* home address */
               proto_tree_add_item(a11_tree, hf_a11_homeaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
               offset += 4;

               /* Home Agent */
               proto_tree_add_item(a11_tree, hf_a11_haaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
               offset += 4;

               /* Care-of-Address */
               proto_tree_add_item(a11_tree, hf_a11_coa, tvb, offset, 4, ENC_BIG_ENDIAN);
               offset += 4;

               /* Identifier - assumed to be an NTP time here */
               proto_tree_add_item(a11_tree, hf_a11_ident, tvb, offset, 8, ENC_TIME_NTP|ENC_BIG_ENDIAN);

               offset += 8;

           } /* if tree */
           break;


    case BC_REGISTRATION_REPLY:
        col_add_fstr(pinfo->cinfo, COL_INFO, "BC Reg Reply:   BSN=%s, Code=%u",
            tvb_ip_to_str(pinfo->pool, tvb, offset + 8),
            tvb_get_uint8(tvb, offset + 1));

        if (tree) {
            /* Add Subtree */
            ti = proto_tree_add_item(tree, proto_a11, tvb, offset, -1, ENC_NA);
            a11_tree = proto_item_add_subtree(ti, ett_a11);

            /* Type */
            proto_tree_add_uint(a11_tree, hf_a11_type, tvb, offset, 1, type);
            offset += 1;

            /* Reply Code */
            proto_tree_add_item(a11_tree, hf_a11_code, tvb, offset, 1, ENC_BIG_ENDIAN);
            offset += 1;

            /* Registration Lifetime */
            proto_tree_add_item(a11_tree, hf_a11_life, tvb, offset, 2, ENC_BIG_ENDIAN);
            offset += 2;

            /* Home address */
            proto_tree_add_item(a11_tree, hf_a11_homeaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Home Agent */
            proto_tree_add_item(a11_tree, hf_a11_haaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Identifier - assumed to be an NTP time here */
            proto_tree_add_item(a11_tree, hf_a11_ident, tvb, offset, 8, ENC_TIME_NTP|ENC_BIG_ENDIAN);

            offset += 8;
        } /* if tree */

        break;
    case BC_REGISTRATION_UPDATE:
        col_add_fstr(pinfo->cinfo, COL_INFO,"BC Reg Update:  BSN=%s",
            tvb_ip_to_str(pinfo->pool, tvb, offset + 8));
        if (tree) {
            /* Add Subtree */
            ti = proto_tree_add_item(tree, proto_a11, tvb, offset, -1, ENC_NA);
            a11_tree = proto_item_add_subtree(ti, ett_a11);

            /* Type */
            proto_tree_add_uint(a11_tree, hf_a11_type, tvb, offset, 1, type);
            offset += 1;

            /* Reserved */
            offset += 3;

            /* Home address */
            proto_tree_add_item(a11_tree, hf_a11_homeaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Home Agent */
            proto_tree_add_item(a11_tree, hf_a11_haaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Identifier - assumed to be an NTP time here */
            proto_tree_add_item(a11_tree, hf_a11_ident, tvb, offset, 8, ENC_TIME_NTP|ENC_BIG_ENDIAN);
            offset += 8;

        } /* if tree */
        break;
    case BC_REGISTRATION_ACK:
        col_add_fstr(pinfo->cinfo, COL_INFO, "BC Reg Acknowledge:     PCF=%s Status=%u",
            tvb_ip_to_str(pinfo->pool, tvb, offset + 8),
            tvb_get_uint8(tvb, offset + 3));
        if (tree) {
            /* Add Subtree */
            ti = proto_tree_add_item(tree, proto_a11, tvb, offset, -1, ENC_NA);
            a11_tree = proto_item_add_subtree(ti, ett_a11);

            /* Type */
            proto_tree_add_uint(a11_tree, hf_a11_type, tvb, offset, 1, type);
            offset += 1;

            /* Reserved */
            offset += 2;

            /* Ack Status */
            proto_tree_add_item(a11_tree, hf_a11_status, tvb, offset, 1, ENC_BIG_ENDIAN);
            offset += 1;

            /* Home address */
            proto_tree_add_item(a11_tree, hf_a11_homeaddr, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Care-of-Address */
            proto_tree_add_item(a11_tree, hf_a11_coa, tvb, offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            /* Identifier - assumed to be an NTP time here */
            proto_tree_add_item(a11_tree, hf_a11_ident, tvb, offset, 8, ENC_TIME_NTP|ENC_BIG_ENDIAN);

            offset += 8;

        } /* if tree */
        break;

    default:
        DISSECTOR_ASSERT_NOT_REACHED();
        break;
    } /* End switch */

    if (tree && a11_tree) {
        if (tvb_reported_length_remaining(tvb, offset) > 0)
            dissect_a11_extensions(tvb, pinfo, offset, a11_tree);
    }
    return tvb_reported_length(tvb);
} /* dissect_a11 */

/* Register the protocol with Wireshark */
void
proto_register_a11(void)
{

/* Setup list of header fields */
    static hf_register_info hf[] = {
        { &hf_a11_type,
          { "Message Type",           "a11.type",
            FT_UINT8, BASE_DEC | BASE_EXT_STRING, &a11_types_ext, 0,
            "A11 Message Type", HFILL }
        },
        { &hf_a11_flags,
          { "Flags", "a11.flags",
            FT_UINT8, BASE_HEX, NULL, 0x0,
            NULL, HFILL}
        },
        { &hf_a11_s,
          { "Simultaneous Bindings",           "a11.s",
            FT_BOOLEAN, 8, NULL, 128,
            "Simultaneous Bindings Allowed", HFILL }
        },
        { &hf_a11_b,
          { "Broadcast Datagrams",           "a11.b",
            FT_BOOLEAN, 8, NULL, 64,
            "Broadcast Datagrams requested", HFILL }
        },
        { &hf_a11_d,
          { "Co-located Care-of Address",           "a11.d",
            FT_BOOLEAN, 8, NULL, 32,
            "MN using Co-located Care-of address", HFILL }
        },
        { &hf_a11_m,
          { "Minimal Encapsulation",           "a11.m",
            FT_BOOLEAN, 8, NULL, 16,
            "MN wants Minimal encapsulation", HFILL }
        },
        { &hf_a11_g,
          { "GRE",           "a11.g",
            FT_BOOLEAN, 8, NULL, 8,
            "MN wants GRE encapsulation", HFILL }
        },
        { &hf_a11_v,
          { "Van Jacobson",           "a11.v",
            FT_BOOLEAN, 8, NULL, 4,
            NULL, HFILL }
        },
        { &hf_a11_t,
          { "Reverse Tunneling",           "a11.t",
            FT_BOOLEAN, 8, NULL, 2,
            "Reverse tunneling requested", HFILL }
        },
        { &hf_a11_code,
          { "Reply Code",           "a11.code",
            FT_UINT8, BASE_DEC | BASE_EXT_STRING, &a11_reply_codes_ext, 0,
            "A11 Registration Reply code", HFILL }
        },
        { &hf_a11_status,
          { "Reply Status",           "a11.ackstat",
            FT_UINT8, BASE_DEC | BASE_EXT_STRING, &a11_ack_status_ext, 0,
            "A11 Registration Ack Status", HFILL }
        },
        { &hf_a11_life,
          { "Lifetime",           "a11.life",
            FT_UINT16, BASE_DEC, NULL, 0,
            "A11 Registration Lifetime", HFILL }
        },
        { &hf_a11_homeaddr,
          { "Home Address",           "a11.homeaddr",
            FT_IPv4, BASE_NONE, NULL, 0,
            "Mobile Node's home address", HFILL }
        },

        { &hf_a11_haaddr,
          { "Home Agent",           "a11.haaddr",
            FT_IPv4, BASE_NONE, NULL, 0,
            "Home agent IP Address", HFILL }
        },
        { &hf_a11_coa,
          { "Care of Address",           "a11.coa",
            FT_IPv4, BASE_NONE, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_ident,
          { "Identification",           "a11.ident",
            FT_ABSOLUTE_TIME, ABSOLUTE_TIME_UTC, NULL, 0,
            "MN Identification", HFILL }
        },
        { &hf_a11_ext_type,
          { "Extension Type",           "a11.ext.type",
            FT_UINT8, BASE_DEC | BASE_EXT_STRING, &a11_ext_types_ext, 0,
            "Mobile IP Extension Type", HFILL }
        },
        { &hf_a11_ext_stype,
          { "Gen Auth Ext SubType",           "a11.ext.auth.subtype",
            FT_UINT8, BASE_DEC, VALS(a11_ext_stypes), 0,
            "Mobile IP Auth Extension Sub Type", HFILL }
        },
        { &hf_a11_ext_len,
          { "Extension Length",         "a11.ext.len",
            FT_UINT16, BASE_DEC, NULL, 0,
            "Mobile IP Extension Length", HFILL }
        },
        { &hf_a11_ext,
          { "Extension",                      "a11.extension",
            FT_BYTES, BASE_NONE, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_aext_spi,
          { "SPI",                      "a11.auth.spi",
            FT_UINT32, BASE_HEX, NULL, 0,
            "Authentication Header Security Parameter Index", HFILL }
        },
        { &hf_a11_aext_auth,
          { "Authenticator",            "a11.auth.auth",
            FT_BYTES, BASE_NONE, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_next_nai,
          { "NAI",                      "a11.nai",
            FT_STRING, BASE_NONE, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_ses_key,
          { "Key",                      "a11.ext.key",
            FT_UINT32, BASE_HEX, NULL, 0,
            "Session Key", HFILL }
        },
        { &hf_a11_ses_sidver,
          { "Session ID Version",         "a11.ext.sidver",
            FT_UINT8, BASE_DEC, NULL, 3,
            NULL, HFILL}
        },
        { &hf_a11_ses_mnsrid,
          { "MNSR-ID",                      "a11.ext.mnsrid",
            FT_UINT16, BASE_HEX, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_ses_msid_type,
          { "MSID Type",                      "a11.ext.msid_type",
            FT_UINT16, BASE_DEC, VALS(a11_ses_msid_type_vals), 0,
            NULL, HFILL }
        },
        { &hf_a11_ses_msid_len,
          { "MSID Length",                      "a11.ext.msid_len",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_ses_msid,
          { "MSID(BCD)",                      "a11.ext.msid",
            FT_STRING, BASE_NONE, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_ses_ptype,
          { "Protocol Type",                      "a11.ext.ptype",
            FT_UINT16, BASE_HEX, VALS(a11_ses_ptype_vals), 0,
            NULL, HFILL }
        },
        { &hf_a11_vse_vid,
          { "Vendor ID",                      "a11.ext.vid",
            FT_UINT32, BASE_ENTERPRISES, STRINGS_ENTERPRISES, 0,
            NULL, HFILL }
        },
        { &hf_a11_vse_apptype,
          { "Application Type",                      "a11.ext.apptype",
            FT_UINT16, BASE_HEX | BASE_EXT_STRING, &a11_ext_app_ext, 0,
            NULL, HFILL }
        },
        { &hf_a11_vse_ppaddr,
          { "Anchor P-P Address",           "a11.ext.ppaddr",
            FT_IPv4, BASE_NONE, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_vse_dormant,
          { "All Dormant Indicator",           "a11.ext.dormant",
            FT_UINT16, BASE_HEX, VALS(a11_ext_dormant), 0,
            NULL, HFILL }
        },
        { &hf_a11_vse_ehrpd_mode,
          { "eHRPD Mode",           "a11.ext.ehrpd.mode",
            FT_BOOLEAN, BASE_NONE, TFS(&a11_tfs_ehrpd_mode), 0,
            NULL, HFILL }
        },
        { &hf_a11_vse_ehrpd_pmk,
          { "PMK",           "a11.ext.ehrpd.pmk",
            FT_BOOLEAN, 8, TFS(&a11_tfs_ehrpd_pmk), 0x04,
            NULL, HFILL }
        },
        { &hf_a11_vse_ehrpd_handoff_info,
          { "E-UTRAN Handoff Info",           "a11.ext.ehrpd.handoff_info",
            FT_BOOLEAN, 8, TFS(&a11_tfs_ehrpd_handoff_info), 0x02,
            NULL, HFILL }
        },
        { &hf_a11_vse_ehrpd_tunnel_mode,
          { "Tunnel Mode",           "a11.ext.ehrpd.tunnel_mode",
            FT_BOOLEAN, 8, TFS(&a11_tfs_ehrpd_tunnel_mode), 0x01,
            NULL, HFILL }
        },
        { &hf_a11_vse_code,
          { "Reply Code",           "a11.ext.code",
            FT_UINT8, BASE_DEC | BASE_EXT_STRING, &a11_reply_codes_ext, 0,
            NULL, HFILL }
        },
        /* XXX: Is this the correct filter name ?? */
        { &hf_a11_vse_pdit,
          { "PDSN Code",                      "a11.ext.code",
            FT_UINT8, BASE_HEX, VALS(a11_ext_nvose_pdsn_code), 0,
            NULL, HFILL }
        },
        { &hf_a11_vse_session_parameter,
          { "Session Parameter - Always On",                      "a11.ext.session_parameter",
            FT_NONE, BASE_NONE, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_vse_srvopt,
          { "Service Option",                      "a11.ext.srvopt",
            FT_UINT16, BASE_HEX, VALS(a11_ext_nvose_srvopt), 0,
            NULL, HFILL }
        },
        { &hf_a11_vse_panid,
          { "PANID",                      "a11.ext.panid",
            FT_BYTES, BASE_NONE, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_vse_canid,
          { "CANID",                      "a11.ext.canid",
            FT_BYTES, BASE_NONE, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_vse_qosmode,
          { "QoS Mode",       "a11.ext.qosmode",
            FT_UINT8, BASE_HEX, VALS(a11_ext_nvose_qosmode), 0,
            NULL, HFILL }
        },
        { &hf_a11_ase_len_type,
          { "Entry Length",   "a11.ext.ase.len",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_ase_srid_type,
          { "Service Reference ID (SRID)",   "a11.ext.ase.srid",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_ase_servopt_type,
          { "Service Option", "a11.ext.ase.srvopt",
            FT_UINT16, BASE_HEX, VALS(a11_ext_nvose_srvopt), 0,
            NULL, HFILL }
        },
        { &hf_a11_ase_gre_proto_type,
          { "GRE Protocol Type",   "a11.ext.ase.ptype",
            FT_UINT16, BASE_HEX, VALS(a11_ses_ptype_vals), 0,
            NULL, HFILL }
        },
        { &hf_a11_ase_gre_key,
          { "GRE Key",   "a11.ext.ase.key",
            FT_UINT32, BASE_HEX, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_ase_pcf_addr_key,
          { "PCF IP Address",           "a11.ext.ase.pcfip",
            FT_IPv4, BASE_NONE, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_fqi_srid,
          { "SRID",   "a11.ext.fqi.srid",
            FT_UINT8, BASE_DEC, NULL, 0,
            "Forward Flow Entry SRID", HFILL }
        },
        { &hf_a11_fqi_flags,
          { "Flags",   "a11.ext.fqi.flags",
            FT_UINT8, BASE_HEX, NULL, 0,
            "Forward Flow Entry Flags", HFILL }
        },
        { &hf_a11_fqi_flags_ip_flow,
          { "IP Flow Discriminator",   "a11.ext.fqi.flags.ip_flow",
            FT_BOOLEAN, 8, TFS(&tfs_enabled_disabled), A11_FQI_IPFLOW_DISC_ENABLED,
            NULL, HFILL }
        },
        { &hf_a11_fqi_flags_dscp,
          { "DSCP",   "a11.ext.fqi.flags.dscp",
            FT_BOOLEAN, 8, TFS(&tfs_included_not_included), A11_FQI_DSCP_INCLUDED,
            NULL, HFILL }
        },
        { &hf_a11_fqi_entry_flag,
          { "DSCP and Flow State",   "a11.ext.fqi.entry_flag",
            FT_UINT8, BASE_HEX, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_fqi_entry_flag_dscp,
          { "DSCP",   "a11.ext.fqi.entry_flag.dscp",
            FT_UINT8, BASE_HEX, NULL, 0x7E,
            NULL, HFILL }
        },
        { &hf_a11_fqi_entry_flag_flow_state,
          { "Flow State",   "a11.ext.fqi.entry_flag.flow_state",
            FT_BOOLEAN, 8, TFS(&tfs_active_inactive), 0x01,
            NULL, HFILL }
        },
        { &hf_a11_fqi_flowcount,
          { "Forward Flow Count",   "a11.ext.fqi.flowcount",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_fqi_flowid,
          { "Forward Flow Id",   "a11.ext.fqi.flowid",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_fqi_entrylen,
          { "Entry Length",   "a11.ext.fqi.entrylen",
            FT_UINT8, BASE_DEC, NULL, 0,
            "Forward Entry Length", HFILL }
        },
#if 0
        { &hf_a11_fqi_flowstate,
          { "Forward Flow State",   "a11.ext.fqi.flowstate",
            FT_UINT8, BASE_HEX, NULL, 0,
            NULL, HFILL }
        },
#endif
        { &hf_a11_fqi_requested_qoslen,
          { "Requested QoS Length",   "a11.ext.fqi.reqqoslen",
            FT_UINT8, BASE_DEC, NULL, 0,
            "Forward Requested QoS Length", HFILL }
        },
        { &hf_a11_fqi_flow_priority,
          { "Flow Priority",   "a11.ext.fqi.flow_priority",
            FT_UINT8, BASE_DEC, NULL, 0xF0,
            NULL, HFILL }
        },
        { &hf_a11_fqi_num_qos_attribute_set,
          { "Number of QoS Attribute Sets",   "a11.ext.fqi.num_qos_attribute_set",
            FT_UINT8, BASE_DEC, NULL, 0x0E,
            NULL, HFILL }
        },
        { &hf_a11_fqi_qos_attribute_setlen,
          { "QoS Attribute Set Length",   "a11.ext.fqi.qos_attribute_setlen",
            FT_UINT16, BASE_DEC, NULL, 0x01E0,
            NULL, HFILL }
        },
        { &hf_a11_fqi_qos_attribute_setid,
          { "QoS Attribute SetID",   "a11.ext.fqi.qos_attribute_setid",
            FT_UINT16, BASE_DEC, NULL, 0x1FC0,
            NULL, HFILL }
        },
        { &hf_a11_fqi_verbose,
          { "Verbose",   "a11.ext.fqi.verbose",
            FT_UINT8, BASE_DEC, NULL, 0x20,
            NULL, HFILL }
        },
        { &hf_a11_fqi_flow_profileid,
          { "Flow Profile Id",   "a11.ext.fqi.flow_profileid",
            FT_UINT24, BASE_DEC, NULL, 0x1FFFE0,
            NULL, HFILL }
        },
        { &hf_a11_fqi_qos_granted_attribute_setid,
          { "QoS Attribute SetID",   "a11.ext.fqi.qos_granted_attribute_setid",
            FT_UINT8, BASE_DEC, NULL, 0xFE,
            NULL, HFILL }
        },
        { &hf_a11_fqi_granted_qoslen,
          { "Granted QoS Length",   "a11.ext.fqi.graqoslen",
            FT_UINT8, BASE_DEC, NULL, 0,
            "Forward Granted QoS Length", HFILL }
        },
        { &hf_a11_rqi_flow_priority,
          { "Flow Priority",   "a11.ext.rqi.flow_priority",
            FT_UINT8, BASE_DEC, NULL, 0xF0,
            NULL, HFILL }
        },
        { &hf_a11_rqi_num_qos_attribute_set,
          { "Number of QoS Attribute Sets",   "a11.ext.rqi.num_qos_attribute_set",
            FT_UINT8, BASE_DEC, NULL, 0x0E,
            NULL, HFILL }
        },
        { &hf_a11_rqi_qos_attribute_setlen,
          { "QoS Attribute Set Length",   "a11.ext.rqi.qos_attribute_setlen",
            FT_UINT16, BASE_DEC, NULL, 0x01E0,
            NULL, HFILL }
        },
        { &hf_a11_rqi_qos_attribute_setid,
          { "QoS Attribute SetID",   "a11.ext.rqi.qos_attribute_setid",
            FT_UINT16, BASE_DEC, NULL, 0x1FC0,
            NULL, HFILL }
        },
        { &hf_a11_rqi_verbose,
          { "Verbose",   "a11.ext.rqi.verbose",
            FT_UINT8, BASE_DEC, NULL, 0x20,
            NULL, HFILL }
        },
        { &hf_a11_rqi_flow_profileid,
          { "Flow Profile Id",   "a11.ext.rqi.flow_profileid",
            FT_UINT24, BASE_DEC, NULL, 0x1FFFE0,
            NULL, HFILL }
        },
        { &hf_a11_rqi_qos_granted_attribute_setid,
          { "QoS Attribute SetID",   "a11.ext.rqi.qos_granted_attribute_setid",
            FT_UINT8, BASE_DEC, NULL, 0xFE,
            NULL, HFILL }
        },
        { &hf_a11_rqi_srid,
          { "SRID",   "a11.ext.rqi.srid",
            FT_UINT8, BASE_DEC, NULL, 0,
            "Reverse Flow Entry SRID", HFILL }
        },
        { &hf_a11_rqi_flowcount,
          { "Reverse Flow Count",   "a11.ext.rqi.flowcount",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_rqi_flowid,
          { "Reverse Flow Id",   "a11.ext.rqi.flowid",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_rqi_entrylen,
          { "Entry Length",   "a11.ext.rqi.entrylen",
            FT_UINT8, BASE_DEC, NULL, 0,
            "Reverse Flow Entry Length", HFILL }
        },
        { &hf_a11_rqi_entry_flag,
          { "Flags",   "a11.ext.rqi.entry_flag",
            FT_UINT8, BASE_HEX, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_rqi_entry_flag_flow_state,
          { "Flow State",   "a11.ext.rqi.entry_flag.flow_state",
            FT_BOOLEAN, 8, TFS(&tfs_active_inactive), 0x01,
            NULL, HFILL }
        },
#if 0
        { &hf_a11_rqi_flowstate,
          { "Flow State",   "a11.ext.rqi.flowstate",
            FT_UINT8, BASE_HEX, NULL, 0,
            "Reverse Flow State", HFILL }
        },
#endif
        { &hf_a11_rqi_requested_qoslen,
          { "Requested QoS Length",   "a11.ext.rqi.reqqoslen",
            FT_UINT8, BASE_DEC, NULL, 0,
            "Reverse Requested QoS Length", HFILL }
        },
#if 0
        { &hf_a11_rqi_requested_qos,
          { "Requested QoS",   "a11.ext.rqi.reqqos",
            FT_BYTES, BASE_NONE, NULL, 0,
            "Reverse Requested QoS", HFILL }
        },
#endif
        { &hf_a11_rqi_granted_qoslen,
          { "Granted QoS Length",   "a11.ext.rqi.graqoslen",
            FT_UINT8, BASE_DEC, NULL, 0,
            "Reverse Granted QoS Length", HFILL }
        },
#if 0
        { &hf_a11_rqi_granted_qos,
          { "Granted QoS",   "a11.ext.rqi.graqos",
            FT_BYTES, BASE_NONE, NULL, 0,
            "Reverse Granted QoS", HFILL }
        },
#endif
        { &hf_a11_fqui_flowcount,
          { "Forward QoS Update Flow Count",   "a11.ext.fqui.flowcount",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_rqui_flowcount,
          { "Reverse QoS Update Flow Count",   "a11.ext.rqui.flowcount",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_fqui_updated_qoslen,
          { "Forward Updated QoS Sub-Blob Length",   "a11.ext.fqui.updatedqoslen",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_fqui_updated_qos,
          { "Forward Updated QoS Sub-Blob",   "a11.ext.fqui.updatedqos",
            FT_BYTES, BASE_NONE, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_rqui_updated_qoslen,
          { "Reverse Updated QoS Sub-Blob Length",   "a11.ext.rqui.updatedqoslen",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_rqui_updated_qos,
          { "Reverse Updated QoS Sub-Blob",   "a11.ext.rqui.updatedqos",
            FT_BYTES, BASE_NONE, NULL, 0,
            NULL, HFILL }
        },
#if 0
        { &hf_a11_subscriber_profile_len,
          { "Subscriber QoS Profile Length",   "a11.ext.sqp.profilelen",
            FT_BYTES, BASE_NONE, NULL, 0,
            NULL, HFILL }
        },
#endif
        { &hf_a11_subscriber_profile,
          { "Subscriber QoS Profile",   "a11.ext.sqp.profile",
            FT_BYTES, BASE_NONE, NULL, 0,
            NULL, HFILL }
        },

        { &hf_a11_ase_forward_rohc_info_len,
          { "Forward ROHC Info Length",   "a11.ext.ase.forwardlen",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },

        { &hf_a11_ase_forward_maxcid,
          { "Forward MAXCID",   "a11.ext.ase.maxcid",
            FT_UINT16, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },

        { &hf_a11_ase_forward_mrru,
          { "Forward MRRU",   "a11.ext.ase.mrru",
            FT_UINT16, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },

        { &hf_a11_ase_forward_large_cids,
          { "Forward Large CIDS",   "a11.ext.ase.forwardlargecids",
            FT_BOOLEAN, 8, NULL, 0x80,
            NULL, HFILL }
        },

        { &hf_a11_ase_forward_profile_count,
          { "Forward Profile Count",   "a11.ext.ase.profilecount",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },


        { &hf_a11_ase_forward_profile,
          { "Forward Profile",   "a11.ext.ase.forwardprofile",
            FT_UINT16, BASE_DEC | BASE_EXT_STRING, &a11_rohc_profile_vals_ext, 0,
            NULL, HFILL }
        },

        { &hf_a11_ase_reverse_rohc_info_len,
          { "Reverse ROHC Info Length",   "a11.ext.ase.reverselen",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },

        { &hf_a11_ase_reverse_maxcid,
          { "Reverse MAXCID",   "a11.ext.ase.revmaxcid",
            FT_UINT16, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },

        { &hf_a11_ase_reverse_mrru,
          { "Reverse MRRU",   "a11.ext.ase.revmrru",
            FT_UINT16, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },

        { &hf_a11_ase_reverse_large_cids,
          { "Reverse Large CIDS",   "a11.ext.ase.reverselargecids",
            FT_UINT8, BASE_DEC, NULL, 128,
            NULL, HFILL }
        },

        { &hf_a11_ase_reverse_profile_count,
          { "Reverse Profile Count",   "a11.ext.ase.revprofilecount",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },


        { &hf_a11_ase_reverse_profile,
          { "Reverse Profile",   "a11.ext.ase.reverseprofile",
            FT_UINT16, BASE_DEC | BASE_EXT_STRING, &a11_rohc_profile_vals_ext, 0,
            NULL, HFILL }
        },
        { &hf_a11_aut_flow_prof_sub_type,
          { "Sub type",   "a11.aut_flow_prof.sub_type",
            FT_UINT8, BASE_DEC, VALS(a11_aut_flow_prof_subtype_vals), 0,
            NULL, HFILL }
        },
        { &hf_a11_aut_flow_prof_sub_type_len,
          { "Length",   "a11.aut_flow_prof.length",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_aut_flow_prof_sub_type_value,
          { "Value",   "a11.aut_flow_prof.value",
            FT_UINT16, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_serv_opt_prof_max_serv,
          { "Service-Connections-Per-Link-flow",   "a11.serv_opt_prof.scplf",
            FT_UINT32, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_sub_type,
          { "Sub-Type",   "a11.sub_type",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_sub_type_length,
          { "Sub-Type Length",   "a11.sub_type_length",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_serv_opt,
          { "Service Option",   "a11.serviceoption",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_max_num_serv_opt,
          { "Max number of service instances of Service Option",   "a11.max_serviceoptions",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },
        { &hf_a11_bcmcs_stype,
          { "Protocol Type",                      "a11.ext.bcmcs.ptype",
            FT_UINT8, BASE_HEX, VALS(a11_bcmcs_stype_vals), 0,
            NULL, HFILL }
        },
        { &hf_a11_bcmcs_entry_len,
          { "Entry length",                      "a11.ext.bcmcs.entry_len",
            FT_UINT8, BASE_DEC, NULL, 0,
            NULL, HFILL }
        },

    };

    /* Setup protocol subtree array */
    static int *ett[] = {
        &ett_a11,
        &ett_a11_flags,
        &ett_a11_ext,
        &ett_a11_exts,
        &ett_a11_radius,
        &ett_a11_radiuses,
        &ett_a11_ase,
        &ett_a11_fqi_flowentry,
        &ett_a11_fqi_requestedqos,
        &ett_a11_fqi_qos_attribute_set,
        &ett_a11_fqi_grantedqos,
        &ett_a11_rqi_flowentry,
        &ett_a11_rqi_requestedqos,
        &ett_a11_rqi_qos_attribute_set,
        &ett_a11_rqi_grantedqos,
        &ett_a11_fqi_flags,
        &ett_a11_fqi_entry_flags,
        &ett_a11_rqi_entry_flags,
        &ett_a11_fqui_flowentry,
        &ett_a11_rqui_flowentry,
        &ett_a11_subscriber_profile,
        &ett_a11_forward_rohc,
        &ett_a11_reverse_rohc,
        &ett_a11_forward_profile,
        &ett_a11_reverse_profile,
        &ett_a11_aut_flow_profile_ids,
        &ett_a11_bcmcs_entry,
    };

    static ei_register_info ei[] = {
        { &ei_a11_sub_type_length_not2, { "a11.sub_type_length.bad", PI_PROTOCOL, PI_WARN, "Sub-Type Length should be at least 2", EXPFILL }},
        { &ei_a11_sse_too_short, { "a11.sse_too_short", PI_MALFORMED, PI_ERROR, "SSE too short", EXPFILL }},
        { &ei_a11_bcmcs_too_short, { "a11.bcmcs_too_short", PI_MALFORMED, PI_ERROR, "BCMCS too short", EXPFILL }},
        { &ei_a11_entry_data_not_dissected, { "a11.entry_data_not_dissected", PI_UNDECODED, PI_WARN, "Entry Data, Not dissected yet", EXPFILL }},
        { &ei_a11_session_data_not_dissected, { "a11.session_data_not_dissected", PI_UNDECODED, PI_WARN, "Session Data Type Not dissected yet", EXPFILL }},
    };

    expert_module_t* expert_a11;

    /* Register the protocol name and description */
    proto_a11 = proto_register_protocol("3GPP2 A11", "3GPP2 A11", "a11");

    /* Register the dissector by name */
    a11_handle = register_dissector("a11", dissect_a11, proto_a11);

    /* Required function calls to register the header fields and subtrees used */
    proto_register_field_array(proto_a11, hf, array_length(hf));
    proto_register_subtree_array(ett, array_length(ett));

    expert_a11 = expert_register_protocol(proto_a11);
    expert_register_field_array(expert_a11, ei, array_length(ei));
}

void
proto_reg_handoff_a11(void)
{
    dissector_add_uint_with_preference("udp.port", UDP_PORT_3GA11, a11_handle);

    /* 3GPP2-Service-Option-Profile(74) */
    radius_register_avp_dissector(VENDOR_THE3GPP2, 74, dissect_3gpp2_service_option_profile);
    /* 3GPP2-Authorized-Flow-Profile-IDs(131) */
    radius_register_avp_dissector(VENDOR_THE3GPP2, 131, dissect_3gpp2_radius_aut_flow_profile_ids);
}

/*
 * 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:
 */
