/src/wireshark/epan/dissectors/packet-smc.c

Source
/* packet-smc.c
 * SMC dissector for wireshark
 * By Joe Fowler <fowlerja@us.ibm.com>
 * By Guvenc Gulce <guvenc@linux.ibm.com>
 * By Karsten Graul <kgraul@linux.ibm.com>
 * (c) Copyright IBM Corporation 2014,2022
 * LICENSE: GNU General Public License, version 2, or (at your option) any
 * version. http://opensource.org/licenses/gpl-2.0.php
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 *
 * Please refer to the following specs for protocol:
 * - ietf - draft-fox-tcpm-shared-memory-rdma-05
 * - https://www.ibm.com/support/pages/node/6326337
 */

#include "config.h"

#include <epan/packet.h>

#include "packet-tcp.h"

#define SMC_TCP_MIN_HEADER_LENGTH 7
#define CLC_MSG_START_OFFSET 5
#define LLC_MSG_START_OFFSET 3
#define RMBE_CTRL_START_OFFSET 2
#define MAC_ADDR_LEN 6
#define SMC_V2 2
#define GID_LEN 16
#define PEERID_LEN 8
#define DIAG_INFO_LEN 4
#define EID_LEN 32
#define ISM_GID_LEN 8
#define ISM_CHID_LEN 2
#define IPV4_SUBNET_MASK_LEN 4
#define IPV6_PREFIX_LEN 16
#define ONE_BYTE_RESERVED 1
#define TWO_BYTE_RESERVED 2
#define QP_LEN 3
#define RKEY_LEN 4
#define VIRTUAL_ADDR_LEN 8
#define FLAG_BYTE_LEN 1
#define LENGTH_BYTE_LEN 2
#define SEQNO_LEN 2
#define CURSOR_LEN 4
#define ALERT_TOKEN_LEN 4
#define DMB_TOKEN_LEN 8
#define PSN_LEN 3
#define CONN_INDEX_LEN 1
#define SMCR_MSG_BYTE_0 0
#define CLC_MSG_BYTE_0 0
#define CLC_MSG_BYTE_1 1
#define CLC_MSG_BYTE_2 2
#define CLC_MSG_BYTE_3 3
#define CLC_MSG_LEN_OFFSET 5
#define LLC_CMD_OFFSET 0
#define LLC_LEN_OFFSET 1
#define LLC_CMD_RSP_OFFSET 3
#define ACCEPT_CONFIRM_QP_OFFSET 38
#define SMCR_CLC_ID 0xe2d4c3d9 /*EBCDIC 'SMCR' */
#define SMCD_CLC_ID 0xe2d4c3c4 /*EBCDIC 'SMCD' */
#define SMC_CLC_V1    0x10
#define SMC_CLC_SMC_R 0x01
#define SMC_MAX_QP_NUM    6
#define SMCD_MAX_BUFSIZE_NUM  6
#define SMCR_MAX_BUFSIZE_NUM  5

#define LLC_FLAG_RESP 0x80
#define RMBE_CTRL 0xfe
#define LLC_MSG_LENGTH 0x2c

typedef enum {
  SMC_CLC_PROPOSAL = 1,
  SMC_CLC_ACCEPT = 2,
  SMC_CLC_CONFIRMATION = 3,
  SMC_CLC_DECLINE = 4
} clc_message;

typedef enum {
  SMC_CLC_SMCR = 0,
  SMC_CLC_SMCD = 1,
  SMC_CLC_NONE = 2,
  SMC_CLC_BOTH = 3,
} clc_type_message;

typedef enum {
  SMC_CLC_OS_ZOS = 1,
  SMC_CLC_OS_LINUX = 2,
  SMC_CLC_OS_AIX = 3,
  SMC_CLC_OS_UNKNOWN = 15,
} clc_os_message;

typedef enum {
  SMC_CLC_LG_INDIRECT = 0,
  SMC_CLC_LG_DIRECT = 1,
} clc_v2_lg_message;

static const value_string smc_clc_os_message_txt[] = {
  { SMC_CLC_OS_ZOS,      "z/OS" },
  { SMC_CLC_OS_LINUX,    "Linux" },
  { SMC_CLC_OS_AIX,      "AIX" },
  { SMC_CLC_OS_UNKNOWN,  "Unknown" },
  { 0, NULL }
};

static const value_string smc_clc_v2_lg_message_txt[] = {
  { SMC_CLC_LG_INDIRECT,      "V2_INDIRECT" },
  { SMC_CLC_LG_DIRECT,        "V2_DIRECT" },
  { 0, NULL }
};

static const value_string smc_clc_type_message_txt[] = {
  { SMC_CLC_SMCR,     "SMC-R" },
  { SMC_CLC_SMCD,     "SMC-D"   },
  { SMC_CLC_NONE,     "NONE"  },
  { SMC_CLC_BOTH,     "SMC-R/SMC-D"  },
  { 0, NULL }
};


static const value_string smcv2_clc_col_info_message_txt[] = {
  { SMC_CLC_SMCR,     "[SMC-Rv2-Proposal]" },
  { SMC_CLC_SMCD,     "[SMC-Dv2-Proposal]"   },
  { SMC_CLC_NONE,     "[NONE]"  },
  { SMC_CLC_BOTH,     "[SMC-Dv2/SMC-Rv2-Proposal]"  },
  { 0, NULL }
};

static const value_string smc_clc_col_info_message_txt[] = {
  { SMC_CLC_SMCR,     "[SMC-R-Proposal]" },
  { SMC_CLC_SMCD,     "[SMC-D-Proposal]"   },
  { SMC_CLC_NONE,     "[NONE]"  },
  { SMC_CLC_BOTH,     "[SMC-D/SMC-R-Proposal]"  },
  { 0, NULL }
};

static const value_string smcr_clc_message_txt[] = {
  { SMC_CLC_PROPOSAL,     "Proposal" },
  { SMC_CLC_ACCEPT,       "Accept"   },
  { SMC_CLC_CONFIRMATION, "Confirm"  },
  { SMC_CLC_DECLINE,      "Decline"  },
  { 0, NULL }
};

typedef enum {
  LLC_CONFIRM_LINK                = 0x01,
  LLC_ADD_LINK                    = 0x02,
  LLC_ADD_LINK_CONT               = 0x03,
  LLC_DEL_LINK                    = 0x04,
  LLC_CONFIRM_RKEY                = 0x06,
  LLC_CONFIRM_RKEY_CONT           = 0x08,
  LLC_DELETE_RKEY                 = 0x09,
  LLC_TEST_LINK                   = 0x07,
  /* SMC-Rv2 LLC message types */
  LLC_CONFIRM_LINK_V2             = 0x21,
  LLC_ADD_LINK_V2                 = 0x22,
  LLC_DEL_LINK_V2                 = 0x24,
  LLC_REQUEST_ADD_LINK_V2         = 0x25,
  LLC_CONFIRM_RKEY_V2             = 0x26,
  LLC_TEST_LINK_V2                = 0x27,
  LLC_DELETE_RKEY_V2              = 0x29,
  /* Common message types */
  LLC_OPT_MSG_CTRL                = 0x80,
  LLC_NWM_DATA                    = 0x8A,
  LLC_RMBE_CTRL                   = 0xFE
} llc_message;

static const value_string smcr_llc_message_txt[] = {
  { LLC_CONFIRM_LINK,            "Confirm Link" },
  { LLC_ADD_LINK,                "Add Link"   },
  { LLC_ADD_LINK_CONT,           "Add Link Continuous"  },
  { LLC_DEL_LINK,                "Delete Link"  },
  { LLC_CONFIRM_RKEY,            "Confirm Rkey" },
  { LLC_CONFIRM_RKEY_CONT,       "Confirm Rkey Continuous"   },
  { LLC_DELETE_RKEY,             "Delete Rkey"  },
  { LLC_TEST_LINK,               "Test Link"  },
  /* SMC-Rv2 LLC message types */
  { LLC_CONFIRM_LINK_V2,         "Confirm Link (v2)" },
  { LLC_ADD_LINK_V2,             "Add Link (v2)" },
  { LLC_DEL_LINK_V2,             "Delete Link (v2)" },
  { LLC_REQUEST_ADD_LINK_V2,     "Request Add Link (v2)" },
  { LLC_CONFIRM_RKEY_V2,         "Confirm Rkey (v2)" },
  { LLC_TEST_LINK_V2,            "Test Link (v2)" },
  { LLC_DELETE_RKEY_V2,          "Delete Rkey (v2)" },
  /* Common message types */
  { LLC_OPT_MSG_CTRL,            "OPT Message Control"   },
  { LLC_NWM_DATA,                "NWM Data"  },
  { RMBE_CTRL,                   "CDC Message"  },
  { 0, NULL }
};

static int proto_smc;
static int ett_smcr;
static int hf_smcr_clc_msg;
static int hf_smcr_llc_msg;

/* SMC Proposal for both SMC-D and SMC-R */
static int ett_proposal_flag;
static int ett_proposal_ext_flag2;
static int hf_proposal_smc_version_release_number;
static int hf_proposal_smc_version_seid;
static int hf_proposal_smc_version;
static int hf_proposal_smc_type;
static int hf_proposal_smc_v2_type;
static int hf_smc_length;
static int hf_smc_proposal_smc_chid;
static int hf_smc_proposal_flags;
static int hf_smc_proposal_eid;
static int hf_smc_proposal_eid_count;
static int hf_smc_proposal_system_eid;
static int hf_smc_proposal_ext_flags;
static int hf_smc_proposal_client_peer_id;
static int hf_smc_proposal_ism_gid_count;
static int hf_smc_proposal_ism_gid;
static int hf_smc_proposal_client_preferred_gid;
static int hf_smc_proposal_client_preferred_mac;
static int hf_smc_proposal_smcv1_subnet_ext_offset;
static int hf_smc_proposal_smcv2_ext_offset;
static int hf_smc_proposal_outgoing_interface_subnet_mask;
static int hf_smc_proposal_smcdv2_ext_offset;
static int hf_smc_proposal_rocev2_gid_ipv4_addr;
static int hf_smc_proposal_rocev2_gid_ipv6_addr;
static int hf_smc_proposal_outgoing_subnet_mask_signifcant_bits;
static int hf_smc_proposal_ipv6_prefix_count;
static int hf_smc_proposal_ipv6_prefix;
static int hf_smc_proposal_ipv6_prefix_length;

static int hf_smc_reserved;

/* SMC-R Accept */
static int ett_accept_flag;
static int ett_accept_flag2;
static int ett_smcr_accept_fce_flag1;
static int hf_accept_v2_lg_type;
static int hf_accept_smc_version;
static int hf_accept_first_contact;
static int hf_accept_rmb_buffer_size;
static int hf_accept_qp_mtu_value;
static int hf_smcr_accept_flags;
static int hf_smcr_accept_flags2;
static int hf_smcr_accept_fce_flags;
static int hf_smcr_accept_server_peer_id;
static int hf_smcr_accept_server_preferred_gid;
static int hf_smcr_accept_server_preferred_mac;
static int hf_smcr_accept_server_qp_number;
static int hf_smcr_accept_server_rmb_rkey;
static int hf_smcr_accept_server_tcp_conn_index;
static int hf_smcr_accept_server_rmb_element_alert_token;
static int hf_smcr_accept_server_rmb_virtual_address;
static int hf_smcr_accept_initial_psn;

/* SMC-R Confirm */
static int ett_confirm_flag;
static int ett_confirm_flag2;
static int hf_smcr_confirm_flags;
static int hf_smcr_confirm_client_peer_id;
static int hf_smcr_confirm_client_gid;
static int hf_smcr_confirm_client_mac;
static int hf_smcr_confirm_client_qp_number;
static int hf_smcr_confirm_client_rmb_rkey;
static int hf_smcr_confirm_client_tcp_conn_index;
static int hf_smcr_confirm_client_rmb_element_alert_token;
static int hf_smcr_confirm_flags2;
static int hf_smcr_confirm_client_rmb_virtual_address;
static int hf_smcr_confirm_initial_psn;
static int hf_confirm_smc_version;
static int hf_confirm_rmb_buffer_size;
static int hf_confirm_qp_mtu_value;

/* SMC-D Accept */
static int hf_accept_smc_type;
static int ett_smcd_accept_flag;
static int ett_smc_accept_fce_flag;
static int ett_smcd_accept_flag2;
static int hf_smcd_accept_smc_version;
static int hf_accept_os_type;
static int hf_accept_smc_version_release_number;
static int hf_smcd_accept_first_contact;
static int hf_accept_dmb_buffer_size;
static int hf_smcd_accept_flags;
static int hf_smc_accept_fce_flags;
static int hf_smcd_accept_flags2;
static int hf_smcd_accept_server_peer_id;
static int hf_smcd_accept_dmbe_conn_index;
static int hf_smcd_accept_dmb_token;
static int hf_smcd_accept_server_link_id;
static int hf_smcd_accept_smc_chid;
static int hf_smc_accept_eid;
static int hf_smc_accept_peer_name;

/* SMC-D Confirm */
static int hf_confirm_smc_type;
static int ett_smcd_confirm_flag;
static int ett_smc_confirm_fce_flag;
static int ett_smcd_confirm_flag2;
static int hf_smcd_confirm_smc_version;
static int hf_confirm_os_type;
static int hf_smcd_confirm_flags;
static int hf_smcd_confirm_flags2;
static int hf_smc_confirm_first_contact;
static int hf_smcd_confirm_client_peer_id;
static int hf_smcd_confirm_dmb_token;
static int hf_smcd_confirm_dmbe_conn_index;
static int hf_smcd_confirm_client_link_id;
static int hf_confirm_smc_version_release_number;
static int hf_smcd_confirm_dmb_buffer_size;
static int hf_smcd_confirm_smc_chid;
static int hf_smc_confirm_eid;
static int hf_smc_confirm_peer_name;
static int hf_smc_confirm_gid_lst_len;
static int hf_smc_confirm_gid_list_entry;

/* SMC-R Decline */
static int ett_decline_flag;
static int ett_decline_flag2;
static int hf_smc_decline_flags;
static int hf_smc_decline_flags2;
static int hf_smc_decline_peer_id;
static int hf_smc_decline_diag_info;
static int hf_decline_os_type;
static int hf_decline_smc_version;
static int hf_decline_out_of_sync;

/* SMC-R Confirm Link*/
static int ett_confirm_link_flag;
static int hf_smcr_confirm_link_flags;
static int hf_smcr_confirm_link_mac;
static int hf_smcr_confirm_link_gid;
static int hf_smcr_confirm_link_qp_number;
static int hf_smcr_confirm_link_number;
static int hf_smcr_confirm_link_userid;
static int hf_smcr_confirm_link_max_links;
static int hf_smcr_confirm_link_response;

/* SMC-R Add Link */
static int ett_add_link_flag;
static int ett_add_link_flag2;
static int ett_add_link_flag3;
static int hf_smcr_add_link_flags;
static int hf_smcr_add_link_response;
static int hf_smcr_add_link_response_rejected;
static int hf_smcr_add_link_reject_reason;
static int hf_smcr_add_link_mac;
static int hf_smcr_add_link_gid;
static int hf_smcr_add_link_qp_number;
static int hf_smcr_add_link_number;
static int hf_smcr_add_link_initial_psn;
static int hf_smcr_add_link_flags2;
static int hf_smcr_add_link_qp_mtu_value;
static int hf_smcr_add_link_client_target_gid;
static int hf_smcr_add_link_rkey_count;
static int hf_smcr_add_link_rkey;
static int hf_smcr_add_link_rkey2;
static int hf_smcr_add_link_virt_addr;
static int hf_smcr_add_link_flags3;
static int hf_smcr_add_link_flag3_direct_link;

/* SMC-R Add Link Continue*/
static int ett_add_link_cont_flag;
static int hf_smcr_add_link_cont_flags;
static int hf_smcr_add_link_cont_response;
static int hf_smcr_add_link_cont_link_number;
static int hf_smcr_add_link_cont_number_of_rkeys;
static int hf_smcr_add_link_cont_p1_rkey;
static int hf_smcr_add_link_cont_p1_rkey2;
static int hf_smcr_add_link_cont_p1_virt_addr;
static int hf_smcr_add_link_cont_p2_rkey;
static int hf_smcr_add_link_cont_p2_rkey2;
static int hf_smcr_add_link_cont_p2_virt_addr;

/* SMC-Rv2 Request Add Link */
static int ett_request_add_link_flag;
static int hf_smcr_request_add_link_flags;
static int hf_smcr_request_add_link_response;
static int hf_smcr_request_add_link_response_rejected;
static int hf_smcr_request_add_link_reject_reason;
static int hf_smc_request_add_link_gid_lst_len;
static int hf_smc_request_add_link_gid_list_entry;

/* SMC-R Delete Link */
static int ett_delete_link_flag;
static int hf_smcr_delete_link_flags;
static int hf_smcr_delete_link_response;
static int hf_smcr_delete_link_all;
static int hf_smcr_delete_link_orderly;
static int hf_smcr_delete_link_number;
static int hf_smcr_delete_link_reason_code;

/* SMC-R Confirm Rkey */
static int ett_confirm_rkey_flag;
static int hf_smcr_confirm_rkey_response;
static int hf_smcr_confirm_rkey_flags;
static int hf_smcr_confirm_rkey_negative_response;
static int hf_smcr_confirm_rkey_retry_rkey_set;
static int hf_smcr_confirm_rkey_number;
static int hf_smcr_confirm_rkey_new_rkey;
static int hf_smcr_confirm_rkey_virtual_address;
static int hf_smcr_confirm_rkey_link_number;

/* SMC-R Delete Rkey */
static int ett_delete_rkey_flag;
static int hf_smcr_delete_rkey_flags;
static int hf_smcr_delete_rkey_response;
static int hf_smcr_delete_rkey_negative_response;
static int hf_smcr_delete_rkey_mask;
static int hf_smcr_delete_rkey_deleted;
static int hf_smcr_delete_rkey_count;
static int hf_smcr_delete_rkey_invalid_count;

/* SMC-R Test Link */
static int ett_test_link_flag;
static int hf_smcr_test_link_flags;
static int hf_smcr_test_link_response;

/* SMC-R RMBE Control */
static int ett_rmbe_ctrl_rw_status_flag;
static int ett_rmbe_ctrl_peer_conn_state_flag;
static int hf_smcr_rmbe_ctrl_seqno;
static int hf_smcr_rmbe_ctrl_alert_token;
static int hf_smcr_rmbe_ctrl_prod_wrap_seqno;
static int hf_smcr_rmbe_ctrl_peer_prod_curs;
static int hf_smcr_rmbe_ctrl_cons_wrap_seqno;
static int hf_smcr_rmbe_ctrl_peer_cons_curs;
static int hf_smcr_rmbe_ctrl_conn_rw_status_flags;
static int hf_smcr_rmbe_ctrl_write_blocked;
static int hf_smcr_rmbe_ctrl_urgent_pending;
static int hf_smcr_rmbe_ctrl_urgent_present;
static int hf_smcr_rmbe_ctrl_cons_update_requested;
static int hf_smcr_rmbe_ctrl_failover_validation;
static int hf_smcr_rmbe_ctrl_peer_conn_state_flags;
static int hf_smcr_rmbe_ctrl_peer_sending_done;
static int hf_smcr_rmbe_ctrl_peer_closed_conn;
static int hf_smcr_rmbe_ctrl_peer_abnormal_close;

void proto_register_smcr(void);
void proto_reg_handoff_smcr(void);
static dissector_handle_t smc_tcp_handle;
static dissector_handle_t smc_infiniband_handle;

static void
dissect_smc_uncompress_size(proto_item* ti, unsigned size, unsigned max_valid)
{
  if (size <= max_valid) {
    proto_item_append_text(ti, " (Size: %dk)", 1 << (size + 4)); /* uncompressed size */
  } else {
    proto_item_append_text(ti, " (Size: invalid)");
  }
}

static void
dissect_smcr_translate_qp_mtu(proto_item* ti, unsigned qp_num)
{
  if (qp_num > 0 && qp_num < SMC_MAX_QP_NUM) {
    proto_item_append_text(ti, " (MTU: %d)", 1 << (7 + qp_num)); /* translated MTU size (1-5) */
  } else {
    proto_item_append_text(ti, " (MTU: invalid)");
  }
}

static void
dissect_smc_proposal(tvbuff_t *tvb, proto_tree *tree, bool is_ipv6)
{
  unsigned offset;
  uint16_t ip_subnet_ext_offset = 0, v2_ext_offset;
  uint16_t v2_ext_pos = 0, smcd_v2_ext_offset = 0;
  uint16_t smcd_v2_ext_pos = 0;
  uint8_t ipv6_prefix_count, smc_version;
  uint8_t smc_type, num_of_gids = 0, num_of_eids = 0;
  uint8_t smc_type_v1 = 0, smc_type_v2 = 0;
  bool is_smc_v2, is_smcdv1, is_smcdv2 = false, is_smcrv1, is_smcrv2 = false;
  proto_item *proposal_flag_item;
  proto_tree *proposal_flag_tree;

  offset = CLC_MSG_START_OFFSET;
  proto_tree_add_item(tree, hf_smc_length, tvb, offset, LENGTH_BYTE_LEN, ENC_BIG_ENDIAN);
  offset += LENGTH_BYTE_LEN;
  proposal_flag_item = proto_tree_add_item(tree, hf_smc_proposal_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proposal_flag_tree = proto_item_add_subtree(proposal_flag_item, ett_proposal_flag);
  proto_tree_add_item_ret_uint8(proposal_flag_tree, hf_proposal_smc_version, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN, &smc_version);
  smc_type = tvb_get_uint8(tvb, offset);
  is_smc_v2 = (smc_version >= SMC_V2);
  smc_type_v2 = ((smc_type >> 2) & 0x03);
  smc_type_v1 = (smc_type & 0x03);
  is_smcdv1 = ((smc_type_v1 == SMC_CLC_SMCD) || (smc_type_v1 == SMC_CLC_BOTH));
  is_smcrv1 = ((smc_type_v1 == SMC_CLC_SMCR) || (smc_type_v1 == SMC_CLC_BOTH));
  if (is_smc_v2) {
    is_smcdv2 = ((smc_type_v2 == SMC_CLC_SMCD) || (smc_type_v2 == SMC_CLC_BOTH));
    is_smcrv2 = ((smc_type_v2 == SMC_CLC_SMCR) || (smc_type_v2 == SMC_CLC_BOTH));
  }

  if (is_smc_v2) {
    proto_tree_add_item(proposal_flag_tree, hf_proposal_smc_v2_type, tvb,
      offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  }
  proto_tree_add_item(proposal_flag_tree, hf_proposal_smc_type, tvb,
      offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  offset += FLAG_BYTE_LEN;
  if (is_smcrv1 || is_smcrv2) {
    proto_tree_add_item(tree, hf_smc_proposal_client_peer_id, tvb, offset,
      PEERID_LEN, ENC_BIG_ENDIAN);
  } else {
    proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, PEERID_LEN, ENC_NA);
  }
  offset += PEERID_LEN;
  if (is_smcrv1) {
    proto_tree_add_item(tree, hf_smc_proposal_client_preferred_gid, tvb,
      offset, GID_LEN, ENC_NA);
    offset += GID_LEN;
    proto_tree_add_item(tree, hf_smc_proposal_client_preferred_mac, tvb,
      offset, MAC_ADDR_LEN, ENC_NA);
    offset += MAC_ADDR_LEN;
  } else {
    proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, GID_LEN + MAC_ADDR_LEN, ENC_NA);
    offset += GID_LEN + MAC_ADDR_LEN;
  }
  if (is_smcrv1 || is_smcdv1) {
    ip_subnet_ext_offset = tvb_get_ntohs(tvb, offset);
    proto_tree_add_item(tree, hf_smc_proposal_smcv1_subnet_ext_offset, tvb,
      offset, 2, ENC_BIG_ENDIAN);
    offset += 2;
  } else {
    proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 2, ENC_NA);
    offset += 2;
  }
  if (is_smcdv1 || is_smcdv2) {
    proto_tree_add_item(tree, hf_smc_proposal_ism_gid, tvb,
      offset, ISM_GID_LEN, ENC_BIG_ENDIAN);
  }
  offset += ISM_GID_LEN;
  if (is_smcdv2) {
    proto_tree_add_item(tree, hf_smc_proposal_smc_chid, tvb, offset,
      LENGTH_BYTE_LEN, ENC_BIG_ENDIAN);
  } else {
    proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, LENGTH_BYTE_LEN, ENC_NA);
  }
  offset += LENGTH_BYTE_LEN;
  if (is_smc_v2) {
    v2_ext_offset = tvb_get_ntohs(tvb, offset);
    v2_ext_pos = offset + 2 + v2_ext_offset;
    proto_tree_add_item(tree, hf_smc_proposal_smcv2_ext_offset, tvb,
      offset, 2, ENC_BIG_ENDIAN);
  } else {
    proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 2, ENC_NA);
  }
  offset += 2;

  proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 28, ENC_NA);
  offset += 28; /* reserved */

  if (ip_subnet_ext_offset) {
    proto_tree_add_item(tree, hf_smc_proposal_outgoing_interface_subnet_mask, tvb,
      offset, IPV4_SUBNET_MASK_LEN, ENC_BIG_ENDIAN);
    offset += IPV4_SUBNET_MASK_LEN;
    proto_tree_add_item(tree, hf_smc_proposal_outgoing_subnet_mask_signifcant_bits, tvb,
      offset, 1, ENC_BIG_ENDIAN);
    offset += 1;
    proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, TWO_BYTE_RESERVED, ENC_NA);
    offset += TWO_BYTE_RESERVED; /* reserved */
    ipv6_prefix_count = tvb_get_uint8(tvb, offset);
    proto_tree_add_item(tree, hf_smc_proposal_ipv6_prefix_count, tvb,
      offset, 1, ENC_BIG_ENDIAN);
    offset += 1;

    while (ipv6_prefix_count != 0) {
      proto_tree_add_item(tree, hf_smc_proposal_ipv6_prefix, tvb,
        offset, IPV6_PREFIX_LEN, ENC_NA);
      offset += IPV6_PREFIX_LEN;
      proto_tree_add_item(tree, hf_smc_proposal_ipv6_prefix_length, tvb,
        offset, 1, ENC_BIG_ENDIAN);
      offset += 1;
      ipv6_prefix_count--;
    }
  }

  if (v2_ext_pos >= offset) {
    offset = v2_ext_pos;
    num_of_eids = tvb_get_uint8(tvb, offset);
    proto_tree_add_item(tree, hf_smc_proposal_eid_count, tvb,
      offset, 1, ENC_BIG_ENDIAN);
    offset += FLAG_BYTE_LEN;
    num_of_gids = tvb_get_uint8(tvb, offset);
    proto_tree_add_item(tree, hf_smc_proposal_ism_gid_count, tvb,
      offset, 1, ENC_BIG_ENDIAN);
    offset += FLAG_BYTE_LEN;
    proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, ONE_BYTE_RESERVED, ENC_NA);
    offset += ONE_BYTE_RESERVED; /* reserved */
    proposal_flag_item = proto_tree_add_item(tree, hf_smc_proposal_ext_flags, tvb,
              offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
    proposal_flag_tree = proto_item_add_subtree(proposal_flag_item, ett_proposal_ext_flag2);
    proto_tree_add_item(proposal_flag_tree, hf_proposal_smc_version_release_number,
        tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
    proto_tree_add_item(proposal_flag_tree, hf_proposal_smc_version_seid, tvb,
        offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
    offset += FLAG_BYTE_LEN;
    proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, TWO_BYTE_RESERVED, ENC_NA);
    offset += TWO_BYTE_RESERVED; /* reserved */
    smcd_v2_ext_offset = tvb_get_ntohs(tvb, offset);
    proto_tree_add_item(tree, hf_smc_proposal_smcdv2_ext_offset, tvb,
      offset, 2, ENC_BIG_ENDIAN);
    offset += 2;
    smcd_v2_ext_pos = offset + smcd_v2_ext_offset;
    if (is_smcrv2) {
      if (is_ipv6) {
        proto_tree_add_item(tree, hf_smc_proposal_rocev2_gid_ipv6_addr, tvb,
          offset, GID_LEN, ENC_NA);
        offset += GID_LEN;
      } else {
        proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 12, ENC_NA);
        offset += 12; /* reserved */
        proto_tree_add_item(tree, hf_smc_proposal_rocev2_gid_ipv4_addr, tvb,
          offset, IPV4_SUBNET_MASK_LEN, ENC_BIG_ENDIAN);
        offset += IPV4_SUBNET_MASK_LEN;
      }
    } else {
      offset += GID_LEN;
    }
    proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 16, ENC_NA);
    offset += 16; /* reserved */
    while (num_of_eids != 0) {
      proto_tree_add_item(tree, hf_smc_proposal_eid, tvb,
          offset, EID_LEN, ENC_ASCII);
      offset += EID_LEN;
      num_of_eids--;
    }
    if (smcd_v2_ext_pos >= offset) {
      offset = smcd_v2_ext_pos;
      proto_tree_add_item(tree, hf_smc_proposal_system_eid, tvb,
          offset, EID_LEN, ENC_ASCII);
      offset += EID_LEN;
      proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 16, ENC_NA);
      offset += 16; /* reserved */
      while (num_of_gids != 0) {
        proto_tree_add_item(tree, hf_smc_proposal_ism_gid, tvb,
          offset, ISM_GID_LEN, ENC_BIG_ENDIAN);
        offset += ISM_GID_LEN;
        proto_tree_add_item(tree, hf_smc_proposal_smc_chid, tvb, offset,
            ISM_CHID_LEN, ENC_BIG_ENDIAN);
        offset += ISM_CHID_LEN;
        num_of_gids--;
      }
    }
  }
}

static void
dissect_smcd_accept(tvbuff_t* tvb, proto_tree* tree)
{
  unsigned offset, dmbe_size;
  proto_item* accept_flag_item;
  proto_tree* accept_flag_tree;
  proto_item* accept_flag2_item;
  proto_tree* accept_flag2_tree;
  proto_item* ti;
  uint8_t smc_version, first_contact = 0;

  offset = CLC_MSG_START_OFFSET;
  proto_tree_add_item(tree, hf_smc_length, tvb, offset,
    LENGTH_BYTE_LEN, ENC_BIG_ENDIAN);
  offset += LENGTH_BYTE_LEN;
  accept_flag_item = proto_tree_add_item(tree, hf_smcd_accept_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  accept_flag_tree = proto_item_add_subtree(accept_flag_item, ett_smcd_accept_flag);
  proto_tree_add_item(accept_flag_tree, hf_smcd_accept_smc_version, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(accept_flag_tree, hf_smcd_accept_first_contact, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(accept_flag_tree, hf_accept_smc_type, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  smc_version = tvb_get_uint8(tvb, offset);
  first_contact = tvb_get_uint8(tvb, offset);
  smc_version = ((smc_version >> 4) & 0x0F);
  first_contact = ((first_contact >> 3) & 0x01);
  offset += FLAG_BYTE_LEN;
  proto_tree_add_item(tree, hf_smcd_accept_server_peer_id, tvb, offset,
    PEERID_LEN, ENC_BIG_ENDIAN);
  offset += PEERID_LEN;

  proto_tree_add_item(tree, hf_smcd_accept_dmb_token, tvb,
    offset, DMB_TOKEN_LEN, ENC_BIG_ENDIAN);
  offset += DMB_TOKEN_LEN;

  proto_tree_add_item(tree, hf_smcd_accept_dmbe_conn_index, tvb,
    offset, CONN_INDEX_LEN, ENC_BIG_ENDIAN);
  offset += CONN_INDEX_LEN;

  accept_flag2_item = proto_tree_add_item(tree, hf_smcd_accept_flags2, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  accept_flag2_tree = proto_item_add_subtree(accept_flag2_item, ett_smcd_accept_flag2);
  ti = proto_tree_add_item(accept_flag2_tree, hf_accept_dmb_buffer_size, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  dmbe_size = tvb_get_int8(tvb, offset) >> 4;
  dissect_smc_uncompress_size(ti, dmbe_size, SMCD_MAX_BUFSIZE_NUM);
  offset += FLAG_BYTE_LEN;
  proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, TWO_BYTE_RESERVED, ENC_NA);
  offset += TWO_BYTE_RESERVED; /* reserved */
  proto_tree_add_item(tree, hf_smcd_accept_server_link_id, tvb,
    offset, ALERT_TOKEN_LEN, ENC_BIG_ENDIAN);
  offset += ALERT_TOKEN_LEN;

  if (smc_version >= SMC_V2) {
    proto_tree_add_item(tree, hf_smcd_accept_smc_chid, tvb, offset, LENGTH_BYTE_LEN, ENC_BIG_ENDIAN);
    offset += LENGTH_BYTE_LEN;

    proto_tree_add_item(tree, hf_smc_accept_eid, tvb, offset, 32, ENC_ASCII);
    offset += 32;
    proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 8, ENC_NA);
    offset += 8; /* reserved */

    if (first_contact) {
      proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, ONE_BYTE_RESERVED, ENC_NA);
      offset += ONE_BYTE_RESERVED; /* reserved */
      accept_flag_item = proto_tree_add_item(tree, hf_smc_accept_fce_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
      accept_flag_tree = proto_item_add_subtree(accept_flag_item, ett_smc_accept_fce_flag);
      proto_tree_add_item(accept_flag_tree, hf_accept_os_type, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
      proto_tree_add_item(accept_flag_tree, hf_accept_smc_version_release_number, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
      offset += FLAG_BYTE_LEN;
      proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, TWO_BYTE_RESERVED, ENC_NA);
      offset += TWO_BYTE_RESERVED; /* reserved */
      proto_tree_add_item(tree, hf_smc_accept_peer_name, tvb, offset, 32, ENC_ASCII);
      offset += 32;
      proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 16, ENC_NA);
      /* offset += 16; */ /* reserved */
    }
  }
}

static void
dissect_smcd_confirm(tvbuff_t* tvb, proto_tree* tree)
{
  unsigned offset, dmbe_size;
  proto_item* confirm_flag_item;
  proto_tree* confirm_flag_tree;
  proto_item* confirm_flag2_item;
  proto_tree* confirm_flag2_tree;
  proto_item* ti;
  uint8_t smc_version, first_contact = 0;

  offset = CLC_MSG_START_OFFSET;
  proto_tree_add_item(tree, hf_smc_length, tvb, offset,
    LENGTH_BYTE_LEN, ENC_BIG_ENDIAN);
  offset += LENGTH_BYTE_LEN;
  confirm_flag_item = proto_tree_add_item(tree, hf_smcd_confirm_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  confirm_flag_tree = proto_item_add_subtree(confirm_flag_item, ett_smcd_confirm_flag);
  proto_tree_add_item(confirm_flag_tree, hf_smcd_confirm_smc_version, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(confirm_flag_tree, hf_smc_confirm_first_contact, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(confirm_flag_tree, hf_confirm_smc_type, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  smc_version = tvb_get_uint8(tvb, offset);
  first_contact = tvb_get_uint8(tvb, offset);
  smc_version = ((smc_version >> 4) & 0x0F);
  first_contact = ((first_contact >> 3) & 0x01);
  offset += FLAG_BYTE_LEN;
  proto_tree_add_item(tree, hf_smcd_confirm_client_peer_id, tvb, offset,
    PEERID_LEN, ENC_BIG_ENDIAN);
  offset += PEERID_LEN;

  proto_tree_add_item(tree, hf_smcd_confirm_dmb_token, tvb,
    offset, DMB_TOKEN_LEN, ENC_BIG_ENDIAN);
  offset += DMB_TOKEN_LEN;

  proto_tree_add_item(tree, hf_smcd_confirm_dmbe_conn_index, tvb,
    offset, CONN_INDEX_LEN, ENC_BIG_ENDIAN);
  offset += CONN_INDEX_LEN;

  confirm_flag2_item = proto_tree_add_item(tree, hf_smcd_confirm_flags2, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  confirm_flag2_tree = proto_item_add_subtree(confirm_flag2_item, ett_smcd_confirm_flag2);
  ti = proto_tree_add_item(confirm_flag2_tree, hf_smcd_confirm_dmb_buffer_size, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  dmbe_size = tvb_get_int8(tvb, offset) >> 4;
  dissect_smc_uncompress_size(ti, dmbe_size, SMCD_MAX_BUFSIZE_NUM);
  offset += FLAG_BYTE_LEN;
  proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, TWO_BYTE_RESERVED, ENC_NA);
  offset += TWO_BYTE_RESERVED; /* reserved */
  proto_tree_add_item(tree, hf_smcd_confirm_client_link_id, tvb,
    offset, ALERT_TOKEN_LEN, ENC_BIG_ENDIAN);
  offset += ALERT_TOKEN_LEN;

  if (smc_version >= SMC_V2) {
    proto_tree_add_item(tree, hf_smcd_confirm_smc_chid, tvb, offset,
      LENGTH_BYTE_LEN, ENC_BIG_ENDIAN);
    offset += LENGTH_BYTE_LEN;

    proto_tree_add_item(tree, hf_smc_confirm_eid, tvb, offset, 32, ENC_ASCII);
    offset += 32;
    proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 8, ENC_NA);
    offset += 8; /* reserved */

    if (first_contact) {
      proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, ONE_BYTE_RESERVED, ENC_NA);
      offset += ONE_BYTE_RESERVED; /* reserved */
      confirm_flag_item = proto_tree_add_item(tree, hf_smc_accept_fce_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
      confirm_flag_tree = proto_item_add_subtree(confirm_flag_item, ett_smc_confirm_fce_flag);
      proto_tree_add_item(confirm_flag_tree, hf_confirm_os_type, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
      proto_tree_add_item(confirm_flag_tree, hf_confirm_smc_version_release_number, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
      offset += FLAG_BYTE_LEN;
      proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, TWO_BYTE_RESERVED, ENC_NA);
      offset += TWO_BYTE_RESERVED; /* reserved */
      proto_tree_add_item(tree, hf_smc_confirm_peer_name, tvb, offset, 32, ENC_ASCII);
    }
  }
}

static void
dissect_smcr_accept(tvbuff_t *tvb, proto_tree *tree)
{
  unsigned offset, qp_num, rmbe_size;
  proto_item *accept_flag_item;
  proto_tree *accept_flag_tree;
  proto_item *accept_flag2_item;
  proto_tree *accept_flag2_tree;
  proto_item *ti;
  uint8_t smc_version, first_contact = 0;

  offset = CLC_MSG_START_OFFSET;
  proto_tree_add_item(tree, hf_smc_length, tvb, offset,
    LENGTH_BYTE_LEN, ENC_BIG_ENDIAN);
  offset += LENGTH_BYTE_LEN;
  accept_flag_item = proto_tree_add_item(tree, hf_smcr_accept_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  accept_flag_tree = proto_item_add_subtree(accept_flag_item, ett_accept_flag);
  proto_tree_add_item(accept_flag_tree, hf_accept_smc_version, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(accept_flag_tree, hf_accept_first_contact, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  smc_version = tvb_get_uint8(tvb, offset);
  first_contact = tvb_get_uint8(tvb, offset);
  smc_version = ((smc_version >> 4) & 0x0F);
  first_contact = ((first_contact >> 3) & 0x01);
  offset += FLAG_BYTE_LEN;
  proto_tree_add_item(tree, hf_smcr_accept_server_peer_id, tvb, offset,
      PEERID_LEN, ENC_BIG_ENDIAN);
  offset += PEERID_LEN;
  proto_tree_add_item(tree, hf_smcr_accept_server_preferred_gid, tvb,
      offset, GID_LEN, ENC_NA);
  offset += GID_LEN;
  proto_tree_add_item(tree, hf_smcr_accept_server_preferred_mac, tvb,
      offset, MAC_ADDR_LEN, ENC_NA);
  offset += MAC_ADDR_LEN;
  proto_tree_add_item(tree, hf_smcr_accept_server_qp_number, tvb,
      offset, QP_LEN, ENC_BIG_ENDIAN);
  offset += QP_LEN;
  proto_tree_add_item(tree, hf_smcr_accept_server_rmb_rkey, tvb,
      offset, RKEY_LEN, ENC_BIG_ENDIAN);
  offset += RKEY_LEN;
  proto_tree_add_item(tree, hf_smcr_accept_server_tcp_conn_index, tvb,
      offset, CONN_INDEX_LEN, ENC_BIG_ENDIAN);
  offset += CONN_INDEX_LEN;
  proto_tree_add_item(tree, hf_smcr_accept_server_rmb_element_alert_token, tvb,
        offset, ALERT_TOKEN_LEN, ENC_BIG_ENDIAN);
  offset += ALERT_TOKEN_LEN;
  accept_flag2_item = proto_tree_add_item(tree, hf_smcr_accept_flags2, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  accept_flag2_tree = proto_item_add_subtree(accept_flag2_item, ett_accept_flag2);
  ti = proto_tree_add_item(accept_flag2_tree, hf_accept_rmb_buffer_size, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  rmbe_size = tvb_get_int8(tvb, offset) >> 4;
  dissect_smc_uncompress_size(ti, rmbe_size, SMCR_MAX_BUFSIZE_NUM);
  ti = proto_tree_add_item(accept_flag2_tree, hf_accept_qp_mtu_value, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  qp_num = tvb_get_int8(tvb, offset) & 0x0F;
  dissect_smcr_translate_qp_mtu(ti, qp_num);
  offset += FLAG_BYTE_LEN;
  proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, ONE_BYTE_RESERVED, ENC_NA);
  offset += ONE_BYTE_RESERVED; /* reserved */
  proto_tree_add_item(tree, hf_smcr_accept_server_rmb_virtual_address, tvb,
      offset, VIRTUAL_ADDR_LEN, ENC_BIG_ENDIAN);
  offset += VIRTUAL_ADDR_LEN;
  proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, ONE_BYTE_RESERVED, ENC_NA);
  offset += ONE_BYTE_RESERVED; /* reserved */
  proto_tree_add_item(tree, hf_smcr_accept_initial_psn, tvb,
      offset, PSN_LEN, ENC_BIG_ENDIAN);
  offset += PSN_LEN;

  if (smc_version >= SMC_V2) {
    proto_tree_add_item(tree, hf_smc_accept_eid, tvb, offset, 32, ENC_ASCII);
    offset += 32;
    proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 8, ENC_NA);
    offset += 8; /* reserved */

    if (first_contact) {
      accept_flag_item = proto_tree_add_item(tree, hf_smcr_accept_fce_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
      accept_flag_tree = proto_item_add_subtree(accept_flag_item, ett_smcr_accept_fce_flag1);
      proto_tree_add_item(accept_flag_tree, hf_accept_v2_lg_type, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
      offset += FLAG_BYTE_LEN;
      accept_flag_item = proto_tree_add_item(tree, hf_smc_accept_fce_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
      accept_flag_tree = proto_item_add_subtree(accept_flag_item, ett_smc_accept_fce_flag);
      proto_tree_add_item(accept_flag_tree, hf_accept_os_type, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
      proto_tree_add_item(accept_flag_tree, hf_accept_smc_version_release_number, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
      offset += FLAG_BYTE_LEN;
      proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, TWO_BYTE_RESERVED, ENC_NA);
      offset += TWO_BYTE_RESERVED; /* reserved */
      proto_tree_add_item(tree, hf_smc_accept_peer_name, tvb, offset, 32, ENC_ASCII);
      offset += 32;
      proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 16, ENC_NA);
      /* offset += 16; */ /* reserved */
    }
  }
}

static void
dissect_smcr_confirm(tvbuff_t *tvb, proto_tree *tree)
{
  unsigned offset, qp_num, rmbe_size;
  proto_item *confirm_flag_item;
  proto_tree *confirm_flag_tree;
  proto_item *confirm_flag2_item;
  proto_tree *confirm_flag2_tree;
  proto_item *ti;
  uint8_t smc_version, first_contact = 0;
  uint8_t gid_list_len;

  offset = CLC_MSG_START_OFFSET;
  proto_tree_add_item(tree, hf_smc_length, tvb, offset,
    LENGTH_BYTE_LEN, ENC_BIG_ENDIAN);
  offset += LENGTH_BYTE_LEN;
  confirm_flag_item = proto_tree_add_item(tree, hf_smcr_confirm_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  confirm_flag_tree = proto_item_add_subtree(confirm_flag_item, ett_confirm_flag);
  proto_tree_add_item(confirm_flag_tree, hf_confirm_smc_version, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(confirm_flag_tree, hf_smc_confirm_first_contact, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(confirm_flag_tree, hf_confirm_smc_type, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  smc_version = tvb_get_uint8(tvb, offset);
  first_contact = tvb_get_uint8(tvb, offset);
  smc_version = ((smc_version >> 4) & 0x0F);
  first_contact = ((first_contact >> 3) & 0x01);
  offset += FLAG_BYTE_LEN;
  proto_tree_add_item(tree, hf_smcr_confirm_client_peer_id, tvb, offset,
      PEERID_LEN, ENC_BIG_ENDIAN);
  offset += PEERID_LEN;
  proto_tree_add_item(tree, hf_smcr_confirm_client_gid, tvb,
      offset, GID_LEN, ENC_NA);
  offset += GID_LEN;
  proto_tree_add_item(tree, hf_smcr_confirm_client_mac, tvb,
      offset, MAC_ADDR_LEN, ENC_NA);
  offset += MAC_ADDR_LEN;
  proto_tree_add_item(tree, hf_smcr_confirm_client_qp_number, tvb,
      offset, QP_LEN, ENC_BIG_ENDIAN);
  offset += QP_LEN;
  proto_tree_add_item(tree, hf_smcr_confirm_client_rmb_rkey, tvb,
      offset, RKEY_LEN, ENC_BIG_ENDIAN);
  offset += RKEY_LEN;
  proto_tree_add_item(tree, hf_smcr_confirm_client_tcp_conn_index, tvb,
      offset, CONN_INDEX_LEN, ENC_BIG_ENDIAN);
  offset += CONN_INDEX_LEN;
  proto_tree_add_item(tree, hf_smcr_confirm_client_rmb_element_alert_token, tvb,
      offset, ALERT_TOKEN_LEN, ENC_BIG_ENDIAN);
  offset += ALERT_TOKEN_LEN;
  confirm_flag2_item = proto_tree_add_item(tree, hf_smcr_confirm_flags2, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  confirm_flag2_tree = proto_item_add_subtree(confirm_flag2_item, ett_confirm_flag2);
  ti = proto_tree_add_item(confirm_flag2_tree, hf_confirm_rmb_buffer_size, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  rmbe_size = tvb_get_int8(tvb, offset) >> 4;
  dissect_smc_uncompress_size(ti, rmbe_size, SMCR_MAX_BUFSIZE_NUM);
  ti = proto_tree_add_item(confirm_flag2_tree, hf_confirm_qp_mtu_value, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  qp_num = tvb_get_int8(tvb, offset) & 0x0F;
  dissect_smcr_translate_qp_mtu(ti, qp_num);
  offset += FLAG_BYTE_LEN;
  proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, ONE_BYTE_RESERVED, ENC_NA);
  offset += ONE_BYTE_RESERVED; /* reserved */
  proto_tree_add_item(tree, hf_smcr_confirm_client_rmb_virtual_address, tvb,
      offset, VIRTUAL_ADDR_LEN, ENC_BIG_ENDIAN);
  offset += VIRTUAL_ADDR_LEN;
  proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, ONE_BYTE_RESERVED, ENC_NA);
  offset += ONE_BYTE_RESERVED; /* reserved */
  proto_tree_add_item(tree, hf_smcr_confirm_initial_psn, tvb,
      offset, PSN_LEN, ENC_BIG_ENDIAN);

  if (smc_version >= SMC_V2) {
    offset += PSN_LEN;
    proto_tree_add_item(tree, hf_smc_confirm_eid, tvb, offset, 32, ENC_ASCII);
    offset += 32;
    proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 8, ENC_NA);
    offset += 8; /* reserved */

    if (first_contact) {
      confirm_flag_item = proto_tree_add_item(tree, hf_smcr_accept_fce_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
      confirm_flag_tree = proto_item_add_subtree(confirm_flag_item, ett_smcr_accept_fce_flag1);
      proto_tree_add_item(confirm_flag_tree, hf_accept_v2_lg_type, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
      offset += FLAG_BYTE_LEN;
      confirm_flag_item = proto_tree_add_item(tree, hf_smc_accept_fce_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
      confirm_flag_tree = proto_item_add_subtree(confirm_flag_item, ett_smc_confirm_fce_flag);
      proto_tree_add_item(confirm_flag_tree, hf_confirm_os_type, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
      proto_tree_add_item(confirm_flag_tree, hf_confirm_smc_version_release_number, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
      offset += FLAG_BYTE_LEN;
      proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, TWO_BYTE_RESERVED, ENC_NA);
      offset += TWO_BYTE_RESERVED; /* reserved */
      proto_tree_add_item(tree, hf_smc_confirm_peer_name, tvb, offset, 32, ENC_ASCII);
      offset += 32;
      proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 16, ENC_NA);
      offset += 16; /* reserved */
      proto_tree_add_item_ret_uint8(tree, hf_smc_confirm_gid_lst_len, tvb, offset, 1, ENC_BIG_ENDIAN, &gid_list_len);
      offset += 1;
      proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 3, ENC_NA);
      offset += 3; /* reserved */
      while (gid_list_len > 0) {
        proto_tree_add_item(tree, hf_smc_confirm_gid_list_entry, tvb, offset, GID_LEN, ENC_NA);
        offset += GID_LEN;
        gid_list_len--;
      }
    }
  }
}

static void
dissect_smc_decline(tvbuff_t *tvb, proto_tree *tree)
{
  proto_item* decline_flag_item;
  proto_tree* decline_flag_tree;
  proto_item* decline_flag2_item;
  proto_tree* decline_flag2_tree;
  unsigned offset, smc_version, smc_length, num_of_diag;

  offset = CLC_MSG_START_OFFSET;
  proto_tree_add_item(tree, hf_smc_length, tvb, offset,
    LENGTH_BYTE_LEN, ENC_BIG_ENDIAN);
  smc_length = tvb_get_uint16(tvb, offset, ENC_BIG_ENDIAN);
  offset += LENGTH_BYTE_LEN;

  decline_flag_item = proto_tree_add_item(tree, hf_smc_decline_flags, tvb, offset,
    FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  decline_flag_tree = proto_item_add_subtree(decline_flag_item, ett_decline_flag);
  proto_tree_add_item(decline_flag_tree, hf_decline_smc_version, tvb, offset,
    FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(decline_flag_tree, hf_decline_out_of_sync, tvb, offset,
      FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  smc_version = tvb_get_uint8(tvb, offset);
  smc_version = ((smc_version >> 4) & 0x0F);

  offset += FLAG_BYTE_LEN;
  proto_tree_add_item(tree, hf_smc_decline_peer_id, tvb, offset,
      PEERID_LEN, ENC_BIG_ENDIAN);
  offset += PEERID_LEN;
  proto_tree_add_item(tree, hf_smc_decline_diag_info, tvb, offset,
      DIAG_INFO_LEN, ENC_BIG_ENDIAN);
  offset += DIAG_INFO_LEN;
  if (smc_version >= SMC_V2) {
    decline_flag2_item = proto_tree_add_item(tree, hf_smc_decline_flags2, tvb, offset,
      FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
    decline_flag2_tree = proto_item_add_subtree(decline_flag2_item, ett_decline_flag2);
    proto_tree_add_item(decline_flag2_tree, hf_decline_os_type, tvb, offset,
      FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
    offset += FLAG_BYTE_LEN;
    offset += 3;
    if (smc_length >= offset + 16) {
      for (num_of_diag = 0; num_of_diag < 4; num_of_diag++) {
        proto_tree_add_item(tree, hf_smc_decline_diag_info, tvb, offset,
              DIAG_INFO_LEN, ENC_BIG_ENDIAN);
        offset += DIAG_INFO_LEN;
      }
    }
  }
}

static void
dissect_smcr_confirm_link(tvbuff_t *tvb, proto_tree *tree)
{
  unsigned offset;
  proto_item *confirm_flag_item;
  proto_tree *confirm_flag_tree;

  offset = LLC_MSG_START_OFFSET;
  confirm_flag_item = proto_tree_add_item(tree, hf_smcr_confirm_link_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  confirm_flag_tree = proto_item_add_subtree(confirm_flag_item, ett_confirm_link_flag);
  proto_tree_add_item(confirm_flag_tree, hf_smcr_confirm_link_response, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);

  offset += FLAG_BYTE_LEN;
  proto_tree_add_item(tree, hf_smcr_confirm_link_mac, tvb,
      offset, MAC_ADDR_LEN, ENC_NA);
  offset += MAC_ADDR_LEN;
  proto_tree_add_item(tree, hf_smcr_confirm_link_gid, tvb,
      offset, GID_LEN, ENC_NA);
  offset += GID_LEN;
  proto_tree_add_item(tree, hf_smcr_confirm_link_qp_number, tvb,
      offset, QP_LEN, ENC_BIG_ENDIAN);
  offset += QP_LEN;
  proto_tree_add_item(tree, hf_smcr_confirm_link_number, tvb,
      offset, 1, ENC_BIG_ENDIAN);
  offset += 1;
  proto_tree_add_item(tree, hf_smcr_confirm_link_userid, tvb,
      offset, 4, ENC_BIG_ENDIAN);
  offset += 4;
  proto_tree_add_item(tree, hf_smcr_confirm_link_max_links, tvb,
      offset, 1, ENC_BIG_ENDIAN);
}

static void
dissect_smcr_add_link(tvbuff_t *tvb, proto_tree *tree, bool is_smc_v2)
{
  unsigned offset, rkey_count, qp_num;
  proto_item *add_link_flag_item;
  proto_tree *add_link_flag_tree;
  proto_item *add_link_flag2_item;
  proto_tree *add_link_flag2_tree;
  proto_item *add_link_flag3_item;
  proto_tree *add_link_flag3_tree;
  proto_item *ti;
  bool is_response = tvb_get_uint8(tvb, LLC_CMD_RSP_OFFSET) & LLC_FLAG_RESP;

  offset = LLC_MSG_START_OFFSET;
  add_link_flag_item = proto_tree_add_item(tree, hf_smcr_add_link_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  add_link_flag_tree = proto_item_add_subtree(add_link_flag_item, ett_add_link_flag);
  proto_tree_add_item(add_link_flag_tree, hf_smcr_add_link_response, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(add_link_flag_tree, hf_smcr_add_link_response_rejected, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  if (is_smc_v2 && is_response) {
    proto_tree_add_item(add_link_flag_tree, hf_smcr_add_link_reject_reason, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  }
  offset += FLAG_BYTE_LEN;
  proto_tree_add_item(tree, hf_smcr_add_link_mac, tvb,
      offset, MAC_ADDR_LEN, ENC_NA);
  offset += MAC_ADDR_LEN;
  proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, TWO_BYTE_RESERVED, ENC_NA);
  offset += TWO_BYTE_RESERVED; /* reserved */
  proto_tree_add_item(tree, hf_smcr_add_link_gid, tvb,
      offset, GID_LEN, ENC_NA);
  offset += GID_LEN;
  proto_tree_add_item(tree, hf_smcr_add_link_qp_number, tvb,
      offset, QP_LEN, ENC_BIG_ENDIAN);
  offset += QP_LEN;
  proto_tree_add_item(tree, hf_smcr_add_link_number, tvb,
      offset, 1, ENC_BIG_ENDIAN);
  offset += 1;
  add_link_flag2_item = proto_tree_add_item(tree, hf_smcr_add_link_flags2, tvb, offset, 1, ENC_BIG_ENDIAN);
  add_link_flag2_tree = proto_item_add_subtree(add_link_flag2_item, ett_add_link_flag2);
  ti = proto_tree_add_item(add_link_flag2_tree, hf_smcr_add_link_qp_mtu_value, tvb, offset, 1, ENC_BIG_ENDIAN);
  qp_num = tvb_get_int8(tvb, offset) & 0x0F;
  dissect_smcr_translate_qp_mtu(ti, qp_num);
  offset += 1;
  proto_tree_add_item(tree, hf_smcr_add_link_initial_psn, tvb,
      offset, PSN_LEN, ENC_BIG_ENDIAN);
  offset += PSN_LEN;
  if (!is_smc_v2 || is_response)
    return;

  proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 8, ENC_NA);
  offset += 8; /* reserved */
  add_link_flag3_item = proto_tree_add_item(tree, hf_smcr_add_link_flags3, tvb, offset, 1, ENC_BIG_ENDIAN);
  add_link_flag3_tree = proto_item_add_subtree(add_link_flag3_item, ett_add_link_flag3);
  proto_tree_add_item(add_link_flag3_tree, hf_smcr_add_link_flag3_direct_link, tvb, offset, 1, ENC_BIG_ENDIAN);
  offset += 1;
  proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 1, ENC_NA);
  offset += 1; /* reserved */
  proto_tree_add_item(tree, hf_smcr_add_link_client_target_gid, tvb, offset, GID_LEN, ENC_NA);
  offset += GID_LEN;
  proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 8, ENC_NA);
  offset += 8; /* reserved */
  proto_tree_add_item_ret_uint(tree, hf_smcr_add_link_rkey_count, tvb, offset, 2, ENC_BIG_ENDIAN, &rkey_count);
  offset += 2;
  while (rkey_count > 0) {
    proto_tree_add_item(tree, hf_smcr_add_link_rkey, tvb, offset, RKEY_LEN, ENC_BIG_ENDIAN);
    offset += RKEY_LEN;
    proto_tree_add_item(tree, hf_smcr_add_link_rkey2, tvb, offset, RKEY_LEN, ENC_BIG_ENDIAN);
    offset += RKEY_LEN;
    proto_tree_add_item(tree, hf_smcr_add_link_virt_addr, tvb, offset, VIRTUAL_ADDR_LEN, ENC_BIG_ENDIAN);
    offset += VIRTUAL_ADDR_LEN;
    rkey_count--;
  }
}

static void
dissect_smcr_add_continuation(tvbuff_t *tvb, proto_tree *tree)
{
  unsigned offset;
  uint8_t num_of_keys;
  proto_item *add_link_flag_item;
  proto_tree *add_link_flag_tree;

  offset = LLC_MSG_START_OFFSET;
  add_link_flag_item = proto_tree_add_item(tree, hf_smcr_add_link_cont_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  add_link_flag_tree = proto_item_add_subtree(add_link_flag_item, ett_add_link_cont_flag);
  proto_tree_add_item(add_link_flag_tree, hf_smcr_add_link_cont_response, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  offset += FLAG_BYTE_LEN;
  proto_tree_add_item(tree, hf_smcr_add_link_cont_link_number, tvb,
      offset, 1, ENC_BIG_ENDIAN);
  offset += 1;
  proto_tree_add_item(tree, hf_smcr_add_link_cont_number_of_rkeys, tvb,
      offset, 1, ENC_BIG_ENDIAN);
  num_of_keys = tvb_get_uint8(tvb,offset);
  offset += 1;

  if (num_of_keys >= 1) {
    proto_tree_add_item(tree, hf_smcr_add_link_cont_p1_rkey, tvb,
        offset, RKEY_LEN, ENC_BIG_ENDIAN);
    offset += RKEY_LEN;
    proto_tree_add_item(tree, hf_smcr_add_link_cont_p1_rkey2, tvb,
      offset, RKEY_LEN, ENC_BIG_ENDIAN);
    offset += RKEY_LEN;
    proto_tree_add_item(tree, hf_smcr_add_link_cont_p1_virt_addr, tvb,
        offset, VIRTUAL_ADDR_LEN, ENC_BIG_ENDIAN);

    if (num_of_keys >= 2) {
      offset += VIRTUAL_ADDR_LEN;
      proto_tree_add_item(tree, hf_smcr_add_link_cont_p2_rkey, tvb,
          offset, RKEY_LEN, ENC_BIG_ENDIAN);
      offset += RKEY_LEN;
      proto_tree_add_item(tree, hf_smcr_add_link_cont_p2_rkey2, tvb,
          offset, RKEY_LEN, ENC_BIG_ENDIAN);
      offset += RKEY_LEN;
      proto_tree_add_item(tree, hf_smcr_add_link_cont_p2_virt_addr, tvb,
          offset, VIRTUAL_ADDR_LEN, ENC_BIG_ENDIAN);
    }
  }
}

static void
dissect_smcr_request_add_link(tvbuff_t* tvb, proto_tree* tree)
{
  bool is_response = tvb_get_uint8(tvb, LLC_CMD_RSP_OFFSET) & LLC_FLAG_RESP;
  proto_item* add_link_flag_item;
  proto_tree* add_link_flag_tree;
  unsigned offset, gid_list_len;

  offset = LLC_MSG_START_OFFSET;
  add_link_flag_item = proto_tree_add_item(tree, hf_smcr_request_add_link_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  add_link_flag_tree = proto_item_add_subtree(add_link_flag_item, ett_request_add_link_flag);
  proto_tree_add_item(add_link_flag_tree, hf_smcr_request_add_link_response, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(add_link_flag_tree, hf_smcr_request_add_link_response_rejected, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  if (is_response) {
    proto_tree_add_item(add_link_flag_tree, hf_smcr_request_add_link_reject_reason, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  }
  offset += FLAG_BYTE_LEN;
  proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 20, ENC_NA);
  offset += 20; /* reserved */
  proto_tree_add_item_ret_uint(tree, hf_smc_request_add_link_gid_lst_len, tvb, offset, 1, ENC_BIG_ENDIAN, &gid_list_len);
  offset += 1;
  proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 3, ENC_NA);
  offset += 3; /* reserved */
  while (gid_list_len > 0) {
    proto_tree_add_item(tree, hf_smc_request_add_link_gid_list_entry, tvb, offset, GID_LEN, ENC_NA);
    offset += GID_LEN;
    gid_list_len--;
  }
}

static void
dissect_smcr_delete_link(tvbuff_t *tvb, proto_tree *tree)
{
  unsigned offset;
  proto_item *delete_link_flag_item;
  proto_tree *delete_link_flag_tree;

  offset = LLC_MSG_START_OFFSET;
  delete_link_flag_item = proto_tree_add_item(tree, hf_smcr_delete_link_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  delete_link_flag_tree = proto_item_add_subtree(delete_link_flag_item, ett_delete_link_flag);
  proto_tree_add_item(delete_link_flag_tree, hf_smcr_delete_link_response, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(delete_link_flag_tree, hf_smcr_delete_link_all, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(delete_link_flag_tree, hf_smcr_delete_link_orderly, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  offset += FLAG_BYTE_LEN;
  proto_tree_add_item(tree, hf_smcr_delete_link_number, tvb,
      offset, 1, ENC_BIG_ENDIAN);
  offset += 1;
  proto_tree_add_item(tree, hf_smcr_delete_link_reason_code, tvb,
      offset, 4, ENC_BIG_ENDIAN);
}

static void
dissect_smcr_confirm_rkey(tvbuff_t *tvb, proto_tree *tree)
{
  unsigned offset;
  uint8_t num_entries;
  proto_item *confirm_rkey_flag_item;
  proto_tree *confirm_rkey_flag_tree;

  offset = LLC_MSG_START_OFFSET;
  confirm_rkey_flag_item = proto_tree_add_item(tree, hf_smcr_confirm_rkey_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  confirm_rkey_flag_tree = proto_item_add_subtree(confirm_rkey_flag_item, ett_confirm_rkey_flag);
  proto_tree_add_item(confirm_rkey_flag_tree, hf_smcr_confirm_rkey_response, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(confirm_rkey_flag_tree, hf_smcr_confirm_rkey_negative_response,
      tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(confirm_rkey_flag_tree, hf_smcr_confirm_rkey_retry_rkey_set,
      tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  offset += FLAG_BYTE_LEN;
  proto_tree_add_item(tree, hf_smcr_confirm_rkey_number, tvb,
      offset, 1, ENC_BIG_ENDIAN);
  num_entries = tvb_get_uint8(tvb,offset);

  if (num_entries > 2)
    num_entries = 2;

  offset += 1;
  proto_tree_add_item(tree, hf_smcr_confirm_rkey_new_rkey, tvb,
      offset, RKEY_LEN, ENC_BIG_ENDIAN);
  offset += RKEY_LEN;
  proto_tree_add_item(tree, hf_smcr_confirm_rkey_virtual_address, tvb,
      offset, VIRTUAL_ADDR_LEN, ENC_BIG_ENDIAN);

  for (; num_entries > 0; num_entries--) {
    offset += VIRTUAL_ADDR_LEN;
    proto_tree_add_item(tree, hf_smcr_confirm_rkey_link_number, tvb,
      offset, 1, ENC_BIG_ENDIAN);
    offset += 1;
    proto_tree_add_item(tree, hf_smcr_confirm_rkey_new_rkey, tvb,
      offset, RKEY_LEN, ENC_BIG_ENDIAN);
    offset += RKEY_LEN;
    proto_tree_add_item(tree, hf_smcr_confirm_rkey_virtual_address, tvb,
      offset, VIRTUAL_ADDR_LEN, ENC_BIG_ENDIAN);
  }
}

static void
dissect_smcr_confirm_rkey_cont(tvbuff_t *tvb, proto_tree *tree)
{
  unsigned offset;
  proto_item *confirm_rkey_flag_item;
  proto_tree *confirm_rkey_flag_tree;
  uint8_t num_entries;

  offset = LLC_MSG_START_OFFSET;
  confirm_rkey_flag_item = proto_tree_add_item(tree, hf_smcr_confirm_rkey_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  confirm_rkey_flag_tree = proto_item_add_subtree(confirm_rkey_flag_item, ett_confirm_rkey_flag);
  proto_tree_add_item(confirm_rkey_flag_tree, hf_smcr_confirm_rkey_response, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(confirm_rkey_flag_tree, hf_smcr_confirm_rkey_negative_response,
      tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(confirm_rkey_flag_tree, hf_smcr_confirm_rkey_retry_rkey_set,
      tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  offset += FLAG_BYTE_LEN;
  proto_tree_add_item(tree, hf_smcr_confirm_rkey_number, tvb,
      offset, 1, ENC_BIG_ENDIAN);
  num_entries = tvb_get_uint8(tvb,offset);
  if (num_entries > 3)
      num_entries = 3;

  offset += 1;
  for (; num_entries > 0; num_entries--) {
    proto_tree_add_item(tree, hf_smcr_confirm_rkey_link_number, tvb,
      offset, 1, ENC_BIG_ENDIAN);
    offset += 1;
    proto_tree_add_item(tree, hf_smcr_confirm_rkey_new_rkey, tvb,
      offset, RKEY_LEN, ENC_BIG_ENDIAN);
    offset += RKEY_LEN;
    proto_tree_add_item(tree, hf_smcr_confirm_rkey_virtual_address, tvb,
      offset, VIRTUAL_ADDR_LEN, ENC_BIG_ENDIAN);
    offset += VIRTUAL_ADDR_LEN;
  }
}

static void
dissect_smcr_delete_rkey(tvbuff_t *tvb, proto_tree *tree, bool is_smc_v2)
{
  unsigned offset;
  uint8_t count;
  proto_item *delete_rkey_flag_item;
  proto_tree *delete_rkey_flag_tree;

  offset = LLC_MSG_START_OFFSET;
  delete_rkey_flag_item = proto_tree_add_item(tree, hf_smcr_delete_rkey_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  delete_rkey_flag_tree = proto_item_add_subtree(delete_rkey_flag_item, ett_delete_rkey_flag);
  proto_tree_add_item(delete_rkey_flag_tree, hf_smcr_delete_rkey_response, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(delete_rkey_flag_tree, hf_smcr_delete_rkey_negative_response,
        tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  offset += FLAG_BYTE_LEN;
  proto_tree_add_item_ret_uint8(tree, hf_smcr_delete_rkey_count, tvb, offset, 1, ENC_NA, &count);
  offset += 1;
  if (!is_smc_v2) {
    proto_tree_add_item(tree, hf_smcr_delete_rkey_mask, tvb, offset, 1, ENC_BIG_ENDIAN);
  } else {
    bool is_response = tvb_get_uint8(tvb, LLC_CMD_RSP_OFFSET) & LLC_FLAG_RESP;
    if (is_response) {
      proto_tree_add_item_ret_uint8(tree, hf_smcr_delete_rkey_invalid_count, tvb, offset, 1, ENC_NA, &count);
      if (count > 8)
        count = 8; /* show a maximum of 8 invalid rkeys in response */
    }
  }
  offset += 1;
  proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, 2, ENC_NA);
  offset += 2; /* reserved */
  while (count > 0) {
    proto_tree_add_item(tree, hf_smcr_delete_rkey_deleted, tvb,
        offset, RKEY_LEN, ENC_BIG_ENDIAN);
    offset += RKEY_LEN;
    count--;
  }
}

static void
dissect_smcr_test_link(tvbuff_t *tvb, proto_tree *tree)
{
  unsigned offset;
  proto_item *test_link_flag_item;
  proto_tree *test_link_flag_tree;

  offset = LLC_MSG_START_OFFSET;
  test_link_flag_item = proto_tree_add_item(tree, hf_smcr_test_link_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  test_link_flag_tree = proto_item_add_subtree(test_link_flag_item, ett_test_link_flag);
  proto_tree_add_item(test_link_flag_tree, hf_smcr_test_link_response, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
}

static void
dissect_smcr_rmbe_ctrl(tvbuff_t *tvb, proto_tree *tree)
{
  int offset;
  proto_item *rmbe_ctrl_rw_status_flag_item;
  proto_tree *rmbe_ctrl_rw_status_flag_tree;
  proto_item *rmbe_ctrl_peer_conn_state_flag_item;
  proto_tree *rmbe_ctrl_peer_conn_state_flag_tree;

  offset = RMBE_CTRL_START_OFFSET;
  proto_tree_add_item(tree, hf_smcr_rmbe_ctrl_seqno, tvb, offset, SEQNO_LEN, ENC_BIG_ENDIAN);
  offset += SEQNO_LEN;
  proto_tree_add_item(tree, hf_smcr_rmbe_ctrl_alert_token, tvb, offset, ALERT_TOKEN_LEN, ENC_BIG_ENDIAN);
  offset += ALERT_TOKEN_LEN;
  proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, TWO_BYTE_RESERVED, ENC_NA);
  offset += TWO_BYTE_RESERVED; /* reserved */
  proto_tree_add_item(tree, hf_smcr_rmbe_ctrl_prod_wrap_seqno, tvb, offset, SEQNO_LEN, ENC_BIG_ENDIAN);
  offset += SEQNO_LEN;
  proto_tree_add_item(tree, hf_smcr_rmbe_ctrl_peer_prod_curs, tvb, offset, CURSOR_LEN, ENC_BIG_ENDIAN);
  offset += CURSOR_LEN;
  proto_tree_add_item(tree, hf_smc_reserved, tvb, offset, TWO_BYTE_RESERVED, ENC_NA);
  offset += TWO_BYTE_RESERVED; /* reserved */
  proto_tree_add_item(tree, hf_smcr_rmbe_ctrl_cons_wrap_seqno, tvb, offset, SEQNO_LEN, ENC_BIG_ENDIAN);
  offset += SEQNO_LEN;
  proto_tree_add_item(tree, hf_smcr_rmbe_ctrl_peer_cons_curs, tvb, offset, CURSOR_LEN, ENC_BIG_ENDIAN);
  offset += CURSOR_LEN;
  rmbe_ctrl_rw_status_flag_item =
    proto_tree_add_item(tree, hf_smcr_rmbe_ctrl_conn_rw_status_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  rmbe_ctrl_rw_status_flag_tree =
    proto_item_add_subtree(rmbe_ctrl_rw_status_flag_item, ett_rmbe_ctrl_rw_status_flag);
  proto_tree_add_item(rmbe_ctrl_rw_status_flag_tree, hf_smcr_rmbe_ctrl_write_blocked,
      tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(rmbe_ctrl_rw_status_flag_tree, hf_smcr_rmbe_ctrl_urgent_pending,
      tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(rmbe_ctrl_rw_status_flag_tree, hf_smcr_rmbe_ctrl_urgent_present,
      tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(rmbe_ctrl_rw_status_flag_tree, hf_smcr_rmbe_ctrl_cons_update_requested,
      tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(rmbe_ctrl_rw_status_flag_tree, hf_smcr_rmbe_ctrl_failover_validation,
      tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  offset += FLAG_BYTE_LEN;
  rmbe_ctrl_peer_conn_state_flag_item =
    proto_tree_add_item(tree, hf_smcr_rmbe_ctrl_peer_conn_state_flags, tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  rmbe_ctrl_peer_conn_state_flag_tree =
    proto_item_add_subtree(rmbe_ctrl_peer_conn_state_flag_item, ett_rmbe_ctrl_peer_conn_state_flag);
  proto_tree_add_item(rmbe_ctrl_peer_conn_state_flag_tree, hf_smcr_rmbe_ctrl_peer_sending_done,
        tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(rmbe_ctrl_peer_conn_state_flag_tree, hf_smcr_rmbe_ctrl_peer_closed_conn,
      tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
  proto_tree_add_item(rmbe_ctrl_peer_conn_state_flag_tree, hf_smcr_rmbe_ctrl_peer_abnormal_close,
      tvb, offset, FLAG_BYTE_LEN, ENC_BIG_ENDIAN);
}

static uint8_t get_mixed_type(uint8_t v1_type, uint8_t v2_type)
{
  if (v1_type == SMC_CLC_BOTH)
    return v1_type;

  if (v1_type == SMC_CLC_NONE)
    return v2_type;

  if (((v2_type == SMC_CLC_SMCD) && (v1_type == SMC_CLC_SMCR)) ||
      ((v2_type == SMC_CLC_SMCR) && (v1_type == SMC_CLC_SMCD)))
    return SMC_CLC_BOTH;

  return v2_type;
}

static int
dissect_smc_tcp_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
    void *data _U_)
{
  int offset;
  uint16_t msg_len;
  uint8_t smc_type, smc_v2_type = 0, smc_v1_type = 0, smc_version = 0;
  uint8_t mixed_type;
  clc_message clc_msgid;
  proto_item *ti;
  proto_tree *smc_tree;
  bool is_ipv6, is_smc_v2, is_smcd = false;

  msg_len = tvb_get_ntohs(tvb, CLC_MSG_LEN_OFFSET);
  offset = 4;
  clc_msgid = (clc_message)tvb_get_uint8(tvb, offset);

  smc_version = tvb_get_uint8(tvb, offset + 3);
  smc_version = ((smc_version >> 4) & 0x0F);
  smc_type = tvb_get_uint8(tvb, offset + 3);
  is_smc_v2 = (smc_version >= SMC_V2);

  if (is_smc_v2 && (clc_msgid == SMC_CLC_PROPOSAL)) {
    smc_v1_type = (smc_type & 0x03);
    smc_v2_type = ((smc_type >> 2) & 0x03);
  }
  else if (clc_msgid != SMC_CLC_DECLINE) {
    smc_v2_type = (smc_type & 0x03);
    smc_v1_type = (smc_type & 0x03);
  }

  is_ipv6 = (pinfo->src.type == AT_IPv6);

  if (is_smc_v2)
    col_set_str(pinfo->cinfo, COL_PROTOCOL, "SMCv2");
  else
    col_set_str(pinfo->cinfo, COL_PROTOCOL, "SMC");

  if (clc_msgid == SMC_CLC_PROPOSAL) {
    if (is_smc_v2 && (smc_v2_type != SMC_CLC_NONE)) {
      mixed_type = get_mixed_type(smc_v1_type, smc_v2_type);
      col_prepend_fstr(pinfo->cinfo, COL_INFO, "%s,",
          val_to_str_const((uint32_t)mixed_type,
          smcv2_clc_col_info_message_txt, "Unknown Command"));
    } else {
      col_prepend_fstr(pinfo->cinfo, COL_INFO, "%s,",
          val_to_str_const((uint32_t)smc_v1_type,
          smc_clc_col_info_message_txt, "Unknown Command"));
    }
  } else if ((smc_v2_type == SMC_CLC_SMCR) && ((clc_msgid == SMC_CLC_ACCEPT) ||
       (clc_msgid == SMC_CLC_CONFIRMATION))) {
    if (is_smc_v2)
      col_prepend_fstr(pinfo->cinfo, COL_INFO, "[SMC-Rv2-%s],",
          val_to_str_const((uint32_t)clc_msgid,
              smcr_clc_message_txt, "Unknown Command"));
    else
      col_prepend_fstr(pinfo->cinfo, COL_INFO, "[SMC-R-%s],",
          val_to_str_const((uint32_t)clc_msgid,
          smcr_clc_message_txt, "Unknown Command"));

    col_append_fstr(pinfo->cinfo, COL_INFO, " QP=0x%06x",
        tvb_get_ntoh24(tvb, ACCEPT_CONFIRM_QP_OFFSET));
  }
  else if ((smc_v2_type == SMC_CLC_SMCD) && ((clc_msgid == SMC_CLC_ACCEPT) ||
    (clc_msgid == SMC_CLC_CONFIRMATION))) {
    is_smcd = true;
    if (is_smc_v2)
      col_prepend_fstr(pinfo->cinfo, COL_INFO, "[SMC-Dv2-%s],",
          val_to_str_const((uint32_t)clc_msgid,
          smcr_clc_message_txt, "Unknown Command"));
    else
      col_prepend_fstr(pinfo->cinfo, COL_INFO, "[SMC-D-%s],",
          val_to_str_const((uint32_t)clc_msgid,
          smcr_clc_message_txt, "Unknown Command"));
  }
  else {
    if (is_smc_v2)
      col_prepend_fstr(pinfo->cinfo, COL_INFO, "[SMCv2-%s],",
          val_to_str_const((uint32_t)clc_msgid,
          smcr_clc_message_txt, "Unknown Command"));
    else
      col_prepend_fstr(pinfo->cinfo, COL_INFO, "[SMC-%s],",
          val_to_str_const((uint32_t)clc_msgid,
          smcr_clc_message_txt, "Unknown Command"));
  }

  if (!tree)
    return tvb_reported_length(tvb);

  ti = proto_tree_add_item(tree, proto_smc, tvb, 0, msg_len, ENC_NA);
  smc_tree = proto_item_add_subtree(ti, ett_smcr);
  proto_tree_add_item(smc_tree, hf_smcr_clc_msg, tvb, offset, 1,
      ENC_BIG_ENDIAN);
  switch (clc_msgid) {
    case SMC_CLC_PROPOSAL:
      dissect_smc_proposal(tvb, smc_tree, is_ipv6);
      break;
    case SMC_CLC_ACCEPT:
      if (is_smcd)
        dissect_smcd_accept(tvb, smc_tree);
      else
        dissect_smcr_accept(tvb, smc_tree);
      break;
    case SMC_CLC_CONFIRMATION:
      if (is_smcd)
        dissect_smcd_confirm(tvb, smc_tree);
      else
        dissect_smcr_confirm(tvb, smc_tree);
      break;
    case SMC_CLC_DECLINE:
      dissect_smc_decline(tvb, smc_tree);
      break;
    default:
      /* Unknown Command */
      break;
  }
  return tvb_reported_length(tvb);
}

static int
dissect_smcr_infiniband(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
  uint16_t msg_len;
  llc_message llc_msgid;
  proto_item *ti;
  proto_tree *smcr_tree;
  int smc_version;
  bool is_smc_v2;

  llc_msgid = (llc_message) tvb_get_uint8(tvb, LLC_CMD_OFFSET);
  smc_version = ((llc_msgid >> 4) & 0x0F);
  is_smc_v2 = (smc_version == SMC_V2);

  if (!is_smc_v2) {
    msg_len = tvb_get_uint8(tvb, LLC_LEN_OFFSET);
    col_set_str(pinfo->cinfo, COL_PROTOCOL, "SMC-R");
    col_append_str(pinfo->cinfo, COL_INFO, "[SMC-R] ");
  } else {
    msg_len = tvb_get_uint16(tvb, LLC_LEN_OFFSET, ENC_BIG_ENDIAN);
    col_set_str(pinfo->cinfo, COL_PROTOCOL, "SMC-Rv2");
    col_append_str(pinfo->cinfo, COL_INFO, "[SMC-Rv2] ");
  }
  col_append_str(pinfo->cinfo, COL_INFO,
      val_to_str_const((uint32_t)llc_msgid,
      smcr_llc_message_txt, "Unknown Command"));

  if ((llc_msgid != RMBE_CTRL) &&
    (tvb_get_uint8(tvb, LLC_CMD_RSP_OFFSET) & LLC_FLAG_RESP))
      col_append_str(pinfo->cinfo, COL_INFO, "(Resp)");

  ti = proto_tree_add_item(tree, proto_smc, tvb, 0, msg_len, ENC_NA);
  smcr_tree = proto_item_add_subtree(ti, ett_smcr);
  ti = proto_tree_add_item(smcr_tree, hf_smcr_llc_msg, tvb, 0, 1, ENC_BIG_ENDIAN);
  if ((llc_msgid != RMBE_CTRL) &&
    (tvb_get_uint8(tvb, LLC_CMD_RSP_OFFSET) & LLC_FLAG_RESP))
      proto_item_append_text(ti, " (Resp)");

  proto_tree_add_item(smcr_tree, hf_smc_length, tvb, LLC_LEN_OFFSET, (!is_smc_v2?1:2), ENC_BIG_ENDIAN);

  switch (llc_msgid) {
    case LLC_CONFIRM_LINK:
    case LLC_CONFIRM_LINK_V2:
      dissect_smcr_confirm_link(tvb, smcr_tree);
      break;

    case LLC_ADD_LINK:
    case LLC_ADD_LINK_V2:
      dissect_smcr_add_link(tvb, smcr_tree, is_smc_v2);
      break;

    case LLC_ADD_LINK_CONT:
      dissect_smcr_add_continuation(tvb, smcr_tree);
      break;

    case LLC_DEL_LINK:
    case LLC_DEL_LINK_V2:
      dissect_smcr_delete_link(tvb, smcr_tree);
      break;

    case LLC_CONFIRM_RKEY:
    case LLC_CONFIRM_RKEY_V2:
      dissect_smcr_confirm_rkey(tvb, smcr_tree);
      break;

    case LLC_CONFIRM_RKEY_CONT:
      dissect_smcr_confirm_rkey_cont(tvb, smcr_tree);
      break;

    case LLC_DELETE_RKEY:
    case LLC_DELETE_RKEY_V2:
      dissect_smcr_delete_rkey(tvb, smcr_tree, is_smc_v2);
      break;

    case LLC_TEST_LINK:
    case LLC_TEST_LINK_V2:
      dissect_smcr_test_link(tvb, smcr_tree);
      break;

    case LLC_REQUEST_ADD_LINK_V2:
      dissect_smcr_request_add_link(tvb, smcr_tree);
      break;

    case RMBE_CTRL:
      dissect_smcr_rmbe_ctrl(tvb, smcr_tree);
      break;

    default:
      /* Unknown Command */
      break;
  }

  return tvb_captured_length(tvb);
}

static unsigned
get_smcr_pdu_length(packet_info *pinfo _U_, tvbuff_t *tvb, int offset, void *data _U_)
{
  uint32_t length;
  length = tvb_get_ntohs(tvb, offset+CLC_MSG_LEN_OFFSET);
  return length;
}

static int
dissect_smc_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
  void *data)
{
  tcp_dissect_pdus(tvb, pinfo, tree, true, SMC_TCP_MIN_HEADER_LENGTH,
       get_smcr_pdu_length, dissect_smc_tcp_pdu, data);
  return tvb_reported_length(tvb);
}

static bool
dissect_smc_tcp_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
  void *data)
{
  if (tvb_captured_length(tvb) < 4) {
    return false;
  }

  if ((tvb_get_ntohl(tvb, CLC_MSG_BYTE_0) != SMCR_CLC_ID) &&
    (tvb_get_ntohl(tvb, CLC_MSG_BYTE_0) != SMCD_CLC_ID))
    return false;

  dissect_smc_tcp(tvb, pinfo, tree, data);
  return true;
}

static bool
dissect_smcr_infiniband_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
  void *data _U_)
{
  uint16_t msg_len;
  llc_message msg_byte0;
  uint8_t msg_byte1;
  bool v1_check = true, v2_check = true;

  if (tvb_captured_length_remaining(tvb, SMCR_MSG_BYTE_0) < 2)  /* need at least 2 bytes */
    return false;

  /* Grab the first two bytes of the message, as they are needed */
  /*  for validity checking of both CLC and LLC messages         */
  msg_byte0 = (llc_message) tvb_get_uint8(tvb,CLC_MSG_BYTE_0);
  msg_byte1 = tvb_get_uint8(tvb,CLC_MSG_BYTE_1);


  /* Check for possible LLC Messages */

  if (!((msg_byte1 == LLC_MSG_LENGTH) &&
    (((msg_byte0 >= LLC_CONFIRM_LINK) &&
    (msg_byte0 <= LLC_DELETE_RKEY)) ||
    (msg_byte0 == LLC_RMBE_CTRL))))
    v1_check = false;
  if (!(((msg_byte0 >= LLC_CONFIRM_LINK_V2) &&
         (msg_byte0 <= LLC_ADD_LINK_V2)) ||
        ((msg_byte0 >= LLC_DEL_LINK_V2) &&
         (msg_byte0 <= LLC_TEST_LINK_V2)) ||
        (msg_byte0 == LLC_DELETE_RKEY_V2)))
    v2_check = false;

  if ((!v1_check && !v2_check) || (v1_check && v2_check))
    return false;

  if (v1_check)
    msg_len = tvb_get_uint8(tvb, LLC_LEN_OFFSET);
  else
    msg_len = tvb_get_uint16(tvb, LLC_LEN_OFFSET, ENC_BIG_ENDIAN);
  if (msg_len != tvb_reported_length_remaining(tvb, LLC_CMD_OFFSET))
    return false;

  dissect_smcr_infiniband(tvb, pinfo, tree, data);
  return true;
}

void
proto_register_smcr(void)
{
  /* Setup list of header fields */
  static hf_register_info hf[] = {
    { &hf_smcr_clc_msg, {
    "CLC Message", "smc.clc_msg",
    FT_UINT8, BASE_DEC, VALS(smcr_clc_message_txt), 0x0,
    NULL, HFILL}},

    { &hf_smcr_llc_msg, {
    "LLC Message", "smc.llc_msg",
    FT_UINT8, BASE_HEX, VALS(smcr_llc_message_txt), 0x0,
    NULL, HFILL}},

    { &hf_proposal_smc_version_release_number, {
    "SMC Version Release Number", "smc.proposal.smc.version.relnum",
    FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL }},

    { &hf_proposal_smc_version_seid, {
    "SEID Indicator", "smc.proposal.smc.seid",
    FT_BOOLEAN, 8, NULL, 0x01, NULL, HFILL } },

    { &hf_proposal_smc_version, {
    "SMC Version", "smc.proposal.smc.version",
    FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL}},

    { &hf_proposal_smc_type, {
    "SMC(v1) Type", "smc.proposal.smc.type",
    FT_UINT8, BASE_DEC, VALS(smc_clc_type_message_txt),
    0x03, NULL, HFILL}},

    { &hf_accept_smc_type, {
    "SMC Type", "smc.accept.smc.type",
    FT_UINT8, BASE_DEC, VALS(smc_clc_type_message_txt),
    0x03, NULL, HFILL}},

    { &hf_confirm_smc_type, {
    "SMC Type", "smc.confirm.smc.type",
    FT_UINT8, BASE_DEC, VALS(smc_clc_type_message_txt),
    0x03, NULL, HFILL}},

    { &hf_proposal_smc_v2_type, {
    "SMC(v2) Type", "smc.proposal.smcv2.type",
    FT_UINT8, BASE_DEC, VALS(smc_clc_type_message_txt),
    0x0C, NULL, HFILL}},

    { &hf_smc_proposal_smc_chid, {
    "ISMv2 CHID", "smc.proposal.smc.chid",
    FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL}},

    { &hf_smc_length, {
    "SMC Length", "smc.length",
    FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL}},

    { &hf_accept_smc_version, {
    "SMC Version", "smc.proposal.smc.version",
    FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL}},

    { &hf_smcd_accept_smc_version, {
    "SMC Version", "smc.proposal.smc.version",
    FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL}},

    { &hf_smcd_confirm_smc_version, {
    "SMC Version", "smc.proposal.smc.version",
    FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL}},

    { &hf_accept_first_contact, {
    "First Contact", "smc.proposal.first.contact",
    FT_BOOLEAN, 8, NULL, 0x08, NULL, HFILL}},

    { &hf_confirm_smc_version, {
    "SMC Version", "smc.proposal.smc.version",
    FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL}},

    { &hf_accept_rmb_buffer_size, {
    "Server RMB Buffers Size (Compressed Notation)",
    "smc.accept.rmb.buffer.size",
    FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL}},

    { &hf_accept_qp_mtu_value, {
    "QP MTU Value (enumerated value)",
    "smc.accept.qp.mtu.value",
    FT_UINT8, BASE_DEC, NULL, 0x0F, NULL, HFILL}},

    { &hf_confirm_rmb_buffer_size, {
    "Client RMB Buffers Size (Compressed Notation)",
    "smc.confirm.rmb.buffer.size",
    FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL}},

    { &hf_confirm_qp_mtu_value, {
    "QP MTU Value (enumerated value)",
    "smc.confirm.qp.mtu.value",
    FT_UINT8, BASE_DEC, NULL, 0x0F, NULL, HFILL}},

    { &hf_smc_proposal_flags, {
    "Flags", "smc.proposal.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smc_proposal_ext_flags, {
    "Flag 2", "smc.proposal.extflags.2",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_accept_flags, {
    "Flags", "smc.accept.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_accept_flags2, {
    "Flags 2", "smc.accept.flags.2",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_flags, {
    "Flags", "smc.confirm.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_decline_smc_version, {
    "SMC Version", "smc.decline.smc.version",
    FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL} },

    { &hf_decline_out_of_sync, {
    "Out of Sync", "smc.decline.osync",
    FT_BOOLEAN, 8, NULL, 0x08, NULL, HFILL} },

    { &hf_smc_decline_flags2, {
    "Flags 2", "smc.decline.flags2",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smc_decline_flags, {
    "Flags", "smc.decline.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL} },

    { &hf_smcr_confirm_flags2, {
    "Flags 2", "smc.confirm.flags.2",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smc_proposal_client_peer_id, {
    "Sender (Client) Peer ID", "smc.proposal.sender.client.peer.id",
    FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smc_proposal_ism_gid_count, {
    "ISMv2 GID Count", "smc.proposal.ismv2_gid_count",
    FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL} },

    { &hf_smc_proposal_ism_gid, {
    "ISM GID", "smc.proposal.ism.gid",
    FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smc_proposal_client_preferred_gid, {
    "Client Preferred GID", "smc.proposal.client.preferred.gid",
    FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL}},

    { &hf_smc_proposal_client_preferred_mac, {
    "Client Preferred MAC Address",
    "smc.proposal.client.preferred.mac",
    FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_accept_server_peer_id, {
    "Sender (Server) Peer ID", "smc.accept.sender.server.peer.id",
    FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_accept_server_preferred_gid, {
    "Server Preferred GID", "smc.accept.server.preferred.gid",
    FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_accept_server_preferred_mac, {
    "Server Preferred MAC Address",
    "smc.accept.server.preferred.mac",
    FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL}},

    { &hf_smc_proposal_smcv1_subnet_ext_offset, {
    "SMCv1 IP Subnet Extension Offset","smc.proposal.smcv1_subnet_ext_offset",
    FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL} },

    { &hf_smc_proposal_smcv2_ext_offset, {
    "SMCv2 Extension Offset","smc.proposal.smcv2_ext_offset",
    FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL} },

    { &hf_smc_proposal_smcdv2_ext_offset, {
    "SMC-Dv2 Extension Offset","smc.proposal.smcdv2_ext_offset",
    FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL} },

    { &hf_smc_proposal_rocev2_gid_ipv6_addr, {
    "RoCEv2 GID IPv6 Address",
    "smc.proposal.rocev2.gid.ipv6",
    FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL} },

    { &hf_smc_proposal_rocev2_gid_ipv4_addr, {
    "RoCEv2 GID IPv4 Address",
    "smc.proposal.rocev2.gid.ipv4",
    FT_IPv4, BASE_NETMASK, NULL, 0x0, NULL, HFILL}},

    { &hf_smc_proposal_outgoing_interface_subnet_mask, {
    "Outgoing Interface Subnet Mask",
    "smc.outgoing.interface.subnet.mask",
    FT_IPv4, BASE_NETMASK, NULL, 0x0, NULL, HFILL}},

    { &hf_smc_proposal_outgoing_subnet_mask_signifcant_bits, {
    "Outgoing Interface Subnet Mask Number of Significant Bits",
    "smc.outgoing.interface.subnet.mask.number.of.significant.bits",
    FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL}},

    { &hf_smc_proposal_ipv6_prefix_count, {
    "IPv6 Prefix Count","smc.proposal.ipv6.prefix.count",
    FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL} },

    { &hf_smc_proposal_ipv6_prefix, {
    "IPv6 Prefix Value","smc.proposal.ipv6.prefix.value",
    FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL}},

    { &hf_smc_proposal_ipv6_prefix_length, {
    "IPv6 Prefix Length", "smc.proposal.ipv6.prefix.length",
    FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_accept_server_qp_number, {
    "Server QP Number","smc.accept.server.qp.number",
    FT_UINT24, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_accept_server_rmb_rkey, {
    "Server RMB Rkey","smc.accept.server.rmb.rkey",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_accept_server_tcp_conn_index, {
    "Server TCP Connection Index",
    "smc.accept.server.tcp.conn.index",
    FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_accept_server_rmb_element_alert_token, {
    "Server RMB Element Alert Token",
    "smc.accept.server.rmb.element.alert.token",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_accept_server_rmb_virtual_address, {
    "Server's RMB Virtual Address",
    "smc.accept.server.rmb.virtual.address",
    FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_accept_initial_psn, {
    "Initial PSN","smc.accept.initial.psn",
    FT_UINT24, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_client_peer_id, {
    "Sender (Client) Peer ID",
    "smc.confirm.sender.client.peer.id",
    FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_client_gid, {
    "Client GID", "smc.client.gid",
    FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_client_mac, {
    "Client MAC Address", "smc.confirm.client.mac",
    FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_client_qp_number, {
    "Client QP Number","smc.confirm.client.qp.number",
    FT_UINT24, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_client_rmb_rkey, {
    "Client RMB Rkey","smc.confirm.client.rmb.rkey",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_client_tcp_conn_index, {
    "Client TCP Connection Index",
    "smc.confirm.client.tcp.conn.index",
    FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_client_rmb_element_alert_token, {
    "Client RMB Element Alert Token",
    "smc.client.rmb.element.alert.token",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_client_rmb_virtual_address, {
    "Client's RMB Virtual Address",
    "smc.client.rmb.virtual.address",
    FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_initial_psn, {
    "Initial PSN","smc.initial.psn",
    FT_UINT24, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smc_decline_peer_id, {
    "Sender Peer ID", "smc.sender.peer.id",
    FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smc_decline_diag_info, {
    "Peer Diagnosis Information", "smc.peer.diag.info",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_decline_os_type, {
    "OS Type", "smc.decline.os.type",
    FT_UINT8, BASE_DEC, VALS(smc_clc_os_message_txt), 0xF0, NULL, HFILL} },

    { &hf_smcr_confirm_link_gid, {
    "Sender GID", "smc.sender.gid",
    FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_link_mac, {
    "Sender MAC Address", "smc.confirm.link.sender.mac",
    FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_link_qp_number, {
    "Sender QP Number","smc.confirm.link.sender.qp.number",
    FT_UINT24, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_link_number, {
    "Link Number", "smc.confirm.link.number",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_link_userid, {
    "Sender Link User ID",
    "smc.confirm.link.sender.link.userid",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_link_max_links, {
    "Max Links","smc.confirm.link.max.links",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_link_flags, {
    "Flags", "smc.confirm.link.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_link_response, {
    "Response", "smc.confirm.link.response",
    FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}},

    { &hf_smcr_add_link_gid, {
    "Sender GID", "smc.add.link.sender.gid",
    FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_add_link_mac, {
    "Sender MAC Address", "smc.add.link.sender.mac",
    FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_add_link_qp_number, {
    "Sender QP Number","smc.add.link.sender.qp.number",
    FT_UINT24, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_add_link_number, {
    "Link Number", "smc.add.link.link.number",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_add_link_initial_psn, {
    "Initial PSN", "smc.add.link.initial.psn",
    FT_UINT24, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_add_link_flags, {
    "Flags", "smc.add.link.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_add_link_response, {
    "Add Link Response", "smc.add.link.response",
    FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}},

    { &hf_smcr_add_link_response_rejected, {
    "Add Link Rejected", "smc.add.link.response.rejected",
    FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL}},

    { &hf_smcr_add_link_reject_reason, {
    "Reject Reason", "smc.add.link.response.reject_reason",
    FT_UINT8, BASE_HEX, NULL, 0x0F, NULL, HFILL}},

    { &hf_smcr_add_link_flags2, {
    "Flags", "smc.add.link.flags2",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},

    { &hf_smcr_add_link_qp_mtu_value, {
    "QP MTU Value (enumerated value)", "smc.add.link.qp.mtu.value",
    FT_UINT8, BASE_DEC, NULL, 0x0F, NULL, HFILL}},

    { &hf_smcr_add_link_flags3, {
    "V2 Flags", "smc.add.link.flags3",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},

    { &hf_smcr_add_link_flag3_direct_link, {
    "Direct link attachment to peer", "smc.add.link.direct_link",
    FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}},

    { &hf_smcr_add_link_client_target_gid, {
    "Client Target GID", "smc.add.link.client_target_gid",
    FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_add_link_rkey_count, {
    "Number of Rkeys", "smc.add.link.rkey_count",
    FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_add_link_rkey, {
    "RMB RToken Pair - Rkey as known on this SMC Link",
    "smc.add.link.rmb.RTok.Rkey1",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_add_link_rkey2, {
    "RMB RToken Pair - Equivalent Rkey for the new SMC Link",
    "smc.add.link.rmb.RTok.Rkey2",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_add_link_virt_addr, {
    "RMB RToken Pair - Virtual Address for the new SMC Link",
    "smc.add.link.rmb.RTok.virt",
    FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_add_link_cont_flags, {
    "Flags", "smc.add.link.cont.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_add_link_cont_response, {
    "Response", "smc.add.link.cont.response",
    FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}},

    { &hf_smcr_add_link_cont_link_number, {
    "Link Number", "smc.add.link.cont.link.number",
    FT_UINT8, BASE_HEX, NULL, 0x00, NULL, HFILL}},

    { &hf_smcr_add_link_cont_number_of_rkeys, {
    "Number of Rkeys", "smc.add.link.cont.rkey.number",
    FT_UINT8, BASE_DEC, NULL, 0x00, NULL, HFILL}},

    { &hf_smcr_add_link_cont_p1_rkey, {
    "RMB RToken Pair 1 - Rkey as known on this SMC Link",
    "smc.add.link.cont.rmb.RTok1.Rkey1",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_add_link_cont_p1_rkey2, {
    "RMB RToken Pair 1 - Equivalent Rkey for the new SMC Link",
    "smc.add.link.cont.rmb.RTok1.Rkey2",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_add_link_cont_p1_virt_addr, {
    "RMB RToken Pair 1 Virtual Address for the new SMC Link",
    "smc.add.link.cont.rmb.RTok1.virt",
    FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_add_link_cont_p2_rkey, {
    "RMB RToken Pair 2 - Rkey as known on this SMC Link",
    "smc.add.link.cont.rmb.RTok2.Rkey1",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_add_link_cont_p2_rkey2, {
    "RMB RToken Pair 2 - Equivalent Rkey for the new SMC Link",
    "smc.add.link.cont.rmb.RTok2.Rkey2",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_add_link_cont_p2_virt_addr, {
    "RMB RToken Pair 2 Virtual Address for the new SMC Link",
    "smc.add.link.cont.rmb.RTok2.virt",
    FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_request_add_link_flags, {
    "Flags", "smc.add.link.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL} },

    { &hf_smcr_request_add_link_response, {
    "Request Add Link Response", "smc.request.add.link.response",
    FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL} },

    { &hf_smcr_request_add_link_response_rejected, {
    "Request Add Link Rejected", "smc.request.add.link.response.rejected",
    FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL} },

    { &hf_smcr_request_add_link_reject_reason, {
    "Reject Reason", "smc.request.add.link.response.reject_reason",
    FT_UINT8, BASE_HEX, NULL, 0x0F, NULL, HFILL} },

    { &hf_smc_request_add_link_gid_lst_len, {
    "GID List Entry Count", "smc.request.add.link.gid.list.entry_count",
    FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL} },

    { &hf_smc_request_add_link_gid_list_entry, {
    "RoCEv2 GID List Entry", "smc.request.add.link.gid.list.entry",
    FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL} },

    { &hf_smcr_delete_link_flags, {
    "Flags", "smc.delete.link.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_delete_link_response, {
    "Response", "smc.delete.link.response",
    FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}},

    { &hf_smcr_delete_link_all, {
    "Terminate All Links In The Link Group",
    "smc.delete.link.all",
    FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL}},

    { &hf_smcr_delete_link_orderly, {
    "Terminate Links Orderly", "smc.delete.link.orderly",
    FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL}},

    { &hf_smcr_delete_link_number, {
    "Link Number For The Failed Link", "smc.delete.link.number",
    FT_UINT8, BASE_HEX, NULL, 0x00, NULL, HFILL}},

    { &hf_smcr_delete_link_reason_code, {
    "Reason Code", "smc.delete.link.reason.code",
    FT_UINT32, BASE_HEX, NULL, 0x00, NULL, HFILL}},

    { &hf_smcr_confirm_rkey_flags, {
    "Flags", "smc.confirm.rkey.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_rkey_response, {
    "Response", "smc.confirm.rkey.response",
    FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}},

    { &hf_smcr_confirm_rkey_negative_response, {
    "Negative Response", "smc.confirm.rkey.negative.response",
    FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL}},

    { &hf_smcr_confirm_rkey_retry_rkey_set, {
    "Retry Rkey Set", "smc.confirm.rkey.retry.rkey.set",
    FT_BOOLEAN, 8, NULL, 0x10, NULL, HFILL}},

    { &hf_smcr_confirm_rkey_number, {
    "Number of other QP", "smc.confirm.rkey.number.qp",
    FT_UINT8, BASE_DEC, NULL, 0x00, NULL, HFILL}},

    { &hf_smcr_confirm_rkey_new_rkey, {
    "New Rkey for this link","smc.confirm.rkey.new.rkey",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_rkey_virtual_address, {
    "New RMB virtual address for this link",
    "smc.confirm.rkey.new.virt",
    FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_confirm_rkey_link_number, {
    "Link Number", "smc.confirm.rkey.link.number",
    FT_UINT8, BASE_HEX, NULL, 0x00, NULL, HFILL}},

    { &hf_smcr_delete_rkey_flags, {
    "Flags", "smc.delete.rkey.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_delete_rkey_response, {
    "Response", "smc.delete.rkey.response",
    FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}},

    { &hf_smcr_delete_rkey_negative_response, {
    "Negative Response", "smc.delete.rkey.negative.response",
    FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL}},

    { &hf_smcr_delete_rkey_mask, {
    "Error Mask", "smc.delete.rkey.error.mask",
    FT_UINT8, BASE_HEX, NULL, 0x00, NULL, HFILL}},

    { &hf_smcr_delete_rkey_deleted, {
    "RMB Rkey to be deleted", "smc.delete.rkey.deleted",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_delete_rkey_count, {
    "Rkey Count", "smc.delete.rkey.count",
    FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_delete_rkey_invalid_count, {
    "Invalid Rkey Count", "smc.delete.rkey.count.invalid",
    FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_test_link_flags, {
    "Flags", "smc.test.link.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_test_link_response, {
    "Response", "smc.test.link.response",
    FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}},

    { &hf_smcr_rmbe_ctrl_seqno, {
    "Sequence Number", "smc.rmbe.ctrl.seqno",
    FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_rmbe_ctrl_alert_token, {
    "Alert Token", "smc.rmbe.ctrl.alert.token",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smc_proposal_eid_count, {
    "EID Count", "smc.proposal.eid.count",
    FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL} },

    { &hf_smc_proposal_eid, {
    "EID", "smc.proposal.eid",
    FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },

    { &hf_smc_proposal_system_eid, {
    "SEID", "smc.proposal.system.eid",
    FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },

    { &hf_smcr_rmbe_ctrl_prod_wrap_seqno, {
    "Producer window wrap sequence number",
    "smc.rmbe.ctrl.prod.wrap.seq",
    FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_rmbe_ctrl_peer_prod_curs, {
    "Peer Producer Cursor", "smc.rmbe.ctrl.peer.prod.curs",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},

    { &hf_smcr_rmbe_ctrl_cons_wrap_seqno, {
    "Consumer window wrap sequence number",
    "smc.rmbe.ctrl.cons.wrap.seq",
    FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_rmbe_ctrl_peer_cons_curs, {
    "Peer Consumer Cursor", "smc.rmbe.ctrl.peer.cons.curs",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_rmbe_ctrl_conn_rw_status_flags, {
    "Connection read/write status flags",
    "smc.rmbe.ctrl.conn.rw.status.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_rmbe_ctrl_write_blocked, {
    "Write Blocked", "smc.rmbe.ctrl.write.blocked",
    FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}},

    { &hf_smcr_rmbe_ctrl_urgent_pending, {
    "Urgent Data Pending", "smc.rmbe.ctrl.urgent.pending",
    FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL}},

    { &hf_smcr_rmbe_ctrl_urgent_present, {
    "Urgent Data Present", "smc.rmbe.ctrl.urgent.present",
    FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL}},

    { &hf_smcr_rmbe_ctrl_cons_update_requested, {
    "Consumer Cursor Update Requested",
    "smc.rmbe.ctrl.cons.update.requested",
    FT_BOOLEAN, 8, NULL, 0x10, NULL, HFILL}},

    { &hf_smcr_rmbe_ctrl_failover_validation, {
    "Failover Validation Indicator",
    "smc.rmbe.ctrl.failover.validation",
    FT_BOOLEAN, 8, NULL, 0x08, NULL, HFILL}},

    { &hf_smcr_rmbe_ctrl_peer_conn_state_flags, {
    "Peer Connection State Flags",
    "smc.rmbe.ctrl.peer.conn.state.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}},

    { &hf_smcr_rmbe_ctrl_peer_sending_done, {
    "Peer Sending Done", "smc.rmbe.ctrl.peer.sending.done",
    FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}},

    { &hf_smcr_rmbe_ctrl_peer_closed_conn, {
    "Peer Closed Connection", "smc.rmbe.ctrl.peer.closed.conn",
    FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL}},

    { &hf_smcr_rmbe_ctrl_peer_abnormal_close, {
    "Peer Abnormal Close", "smc.rmbe.ctrl.peer.abnormal.close",
    FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL}},

    { &hf_smc_accept_eid, {
    "Negotiated EID", "smc.accept.eid",
    FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },

    { &hf_smc_confirm_eid, {
    "Negotiated EID", "smc.confirm.eid",
    FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },

    { &hf_smc_accept_peer_name, {
    "Peer Host Name", "smc.accept.peer.host.name",
    FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },

    { &hf_smc_confirm_peer_name, {
    "Peer Host Name", "smc.confirm.peer.host.name",
    FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },

    { &hf_smc_confirm_gid_lst_len, {
    "GID List Entry Count", "smc.confirm.gid.list.entry_count",
    FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL} },

    { &hf_smc_confirm_gid_list_entry, {
    "RoCEv2 GID List Entry", "smc.confirm.gid.list.entry",
    FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL} },

    { &hf_smcd_accept_first_contact, {
    "First Contact", "smc.accept.first.contact",
    FT_BOOLEAN, 8, NULL, 0x08, NULL, HFILL} },

    { &hf_smc_confirm_first_contact, {
    "First Contact", "smc.confirm.first.contact",
    FT_BOOLEAN, 8, NULL, 0x08, NULL, HFILL} },

    { &hf_accept_smc_version_release_number, {
    "SMC Version Release Number", "smc.accept.smc.version.relnum",
    FT_UINT8, BASE_DEC, NULL, 0x0F, NULL, HFILL } },

    { &hf_confirm_smc_version_release_number, {
    "SMC Version Release Number", "smc.confirm.smc.version.relnum",
    FT_UINT8, BASE_DEC, NULL, 0x0F, NULL, HFILL } },

    { &hf_accept_os_type, {
    "OS Type", "smc.accept.os.type",
    FT_UINT8, BASE_DEC, VALS(smc_clc_os_message_txt), 0xF0, NULL, HFILL} },

    { &hf_accept_v2_lg_type, {
    "V2 LG Type", "smc.accept.v2_lg.type",
    FT_UINT8, BASE_DEC, VALS(smc_clc_v2_lg_message_txt), 0x80, NULL, HFILL} },

    { &hf_confirm_os_type, {
    "OS Type", "smc.confirm.os.type",
    FT_UINT8, BASE_DEC, VALS(smc_clc_os_message_txt), 0xF0, NULL, HFILL} },

    { &hf_smcd_accept_dmb_token, {
    "DMB Token", "smc.accept.dmb.token",
    FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL} },

    { &hf_smcd_confirm_dmb_token, {
    "DMB Token", "smc.confirm.dmb.token",
    FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL} },

    { &hf_accept_dmb_buffer_size, {
    "Server DMBE Buffers Size (Compressed Notation)",
    "smc.accept.dmbe.buffer.size",
    FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL} },

    { &hf_smcd_confirm_dmb_buffer_size, {
    "Client DMBE Buffers Size (Compressed Notation)",
    "smc.confirm.dmbe.buffer.size",
    FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL} },

    { &hf_smcd_accept_smc_chid, {
    "ISMv2 CHID", "smc.accept.smc.chid",
    FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL} },

    { &hf_smcd_confirm_smc_chid, {
    "ISMv2 CHID", "smc.confirm.smc.chid",
    FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL} },

    { &hf_smcd_accept_server_peer_id, {
    "Sender (Server) ISM GID", "smc.accept.sender.server.ism.gid",
    FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL} },

    { &hf_smcd_confirm_client_peer_id, {
    "Sender (Client) ISM GID", "smc.confirm.sender.client.ism.gid",
    FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL} },

    { &hf_smcd_accept_dmbe_conn_index, {
    "DMBE Connection Index",
    "smc.accept.dmbe.conn.index",
    FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL} },

    { &hf_smcd_accept_server_link_id, {
    "Server Link ID",
    "smc.accept.server.linkid",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL} },

    { &hf_smcd_confirm_dmbe_conn_index, {
    "DMBE Connection Index",
    "smc.confirm.dmbe.conn.index",
    FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL} },

    { &hf_smcd_confirm_client_link_id, {
    "Client Link ID",
    "smc.confirm.client.linkid",
    FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL} },

    { &hf_smcd_accept_flags, {
    "Flags", "smc.accept.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL} },

    { &hf_smcd_confirm_flags, {
    "Flags", "smc.confirm.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL} },

    { &hf_smcd_accept_flags2, {
    "DMBE Size", "smc.accept.dmbe.size",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL} },

    { &hf_smcd_confirm_flags2, {
    "DMBE Size", "smc.confirm.dmbe.size",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL} },

    { &hf_smc_accept_fce_flags, {
    "Flags", "smc.accept.fce.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL} },

    { &hf_smcr_accept_fce_flags, {
    "Flags", "smc.accept.fce1.flags",
    FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL} },

    { &hf_smc_reserved, {
    "Reserved", "smc.reserved",
    FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL} }
  };

  /* Setup protocol subtree arrays */
  static int* ett[] = {
    &ett_smcr,
    &ett_proposal_flag,
    &ett_proposal_ext_flag2,
    &ett_accept_flag,
    &ett_accept_flag2,
    &ett_smcr_accept_fce_flag1,
    &ett_smcd_accept_flag,
    &ett_smcd_accept_flag2,
    &ett_smc_accept_fce_flag,
    &ett_smcd_confirm_flag,
    &ett_smc_confirm_fce_flag,
    &ett_smcd_confirm_flag2,
    &ett_confirm_flag,
    &ett_confirm_flag2,
    &ett_confirm_link_flag,
    &ett_decline_flag,
    &ett_decline_flag2,
    &ett_add_link_flag,
    &ett_add_link_flag2,
    &ett_add_link_flag3,
    &ett_add_link_cont_flag,
    &ett_request_add_link_flag,
    &ett_delete_link_flag,
    &ett_confirm_rkey_flag,
    &ett_delete_rkey_flag,
    &ett_test_link_flag,
    &ett_rmbe_ctrl_rw_status_flag,
    &ett_rmbe_ctrl_peer_conn_state_flag
  };

  proto_smc = proto_register_protocol("Shared Memory Communications",
    "SMC", "smc");

  proto_register_field_array(proto_smc, hf, array_length(hf));
  proto_register_subtree_array(ett, array_length(ett));

  smc_tcp_handle = register_dissector("smc", dissect_smc_tcp, proto_smc);
  smc_infiniband_handle = register_dissector("smc.infiniband", dissect_smcr_infiniband, proto_smc);
}

void
proto_reg_handoff_smcr(void)
{
  heur_dissector_add("tcp", dissect_smc_tcp_heur, "Shared Memory Communications over TCP", "smc_tcp", proto_smc, HEURISTIC_ENABLE);
  heur_dissector_add("infiniband.payload", dissect_smcr_infiniband_heur, "Shared Memory Communications Infiniband", "smcr_infiniband", proto_smc, HEURISTIC_ENABLE);
  dissector_add_for_decode_as("infiniband", smc_infiniband_handle);
}

/*
 * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 *
 * Local variables:
 * c-basic-offset: 8
 * tab-width: 8
 * indent-tabs-mode: t
 * End:
 *
 * vi: set shiftwidth=8 tabstop=8 noexpandtab:
 * :indentSize=8:tabSize=8:noTabs=false:
 */

Coverage Report

Created: 2026-11-12 07:01