iscsi_if.h

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/*
 * iSCSI User/Kernel Shares (Defines, Constants, Protocol definitions, etc)
 *
 * Copyright (C) 2005 Dmitry Yusupov
 * Copyright (C) 2005 Alex Aizman
 * maintained by [email protected]
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * See the file COPYING included with this distribution for more details.
 */

#ifndef ISCSI_IF_H
#define ISCSI_IF_H

#include <scsi/iscsi_proto.h>
#include <linux/in.h>
#include <linux/in6.h>

#define ISCSI_NL_GRP_ISCSID 1
#define ISCSI_NL_GRP_UIP    2

#define UEVENT_BASE         10
#define KEVENT_BASE         100
#define ISCSI_ERR_BASE          1000

enum iscsi_uevent_e {
    ISCSI_UEVENT_UNKNOWN        = 0,

    /* down events */
    ISCSI_UEVENT_CREATE_SESSION = UEVENT_BASE + 1,
    ISCSI_UEVENT_DESTROY_SESSION    = UEVENT_BASE + 2,
    ISCSI_UEVENT_CREATE_CONN    = UEVENT_BASE + 3,
    ISCSI_UEVENT_DESTROY_CONN   = UEVENT_BASE + 4,
    ISCSI_UEVENT_BIND_CONN      = UEVENT_BASE + 5,
    ISCSI_UEVENT_SET_PARAM      = UEVENT_BASE + 6,
    ISCSI_UEVENT_START_CONN     = UEVENT_BASE + 7,
    ISCSI_UEVENT_STOP_CONN      = UEVENT_BASE + 8,
    ISCSI_UEVENT_SEND_PDU       = UEVENT_BASE + 9,
    ISCSI_UEVENT_GET_STATS      = UEVENT_BASE + 10,
    ISCSI_UEVENT_GET_PARAM      = UEVENT_BASE + 11,

    ISCSI_UEVENT_TRANSPORT_EP_CONNECT   = UEVENT_BASE + 12,
    ISCSI_UEVENT_TRANSPORT_EP_POLL      = UEVENT_BASE + 13,
    ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT    = UEVENT_BASE + 14,

    ISCSI_UEVENT_TGT_DSCVR      = UEVENT_BASE + 15,
    ISCSI_UEVENT_SET_HOST_PARAM = UEVENT_BASE + 16,
    ISCSI_UEVENT_UNBIND_SESSION = UEVENT_BASE + 17,
    ISCSI_UEVENT_CREATE_BOUND_SESSION       = UEVENT_BASE + 18,
    ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST  = UEVENT_BASE + 19,

    ISCSI_UEVENT_PATH_UPDATE    = UEVENT_BASE + 20,
    ISCSI_UEVENT_SET_IFACE_PARAMS   = UEVENT_BASE + 21,
    ISCSI_UEVENT_PING       = UEVENT_BASE + 22,
    ISCSI_UEVENT_GET_CHAP       = UEVENT_BASE + 23,
    ISCSI_UEVENT_DELETE_CHAP    = UEVENT_BASE + 24,

    /* up events */
    ISCSI_KEVENT_RECV_PDU       = KEVENT_BASE + 1,
    ISCSI_KEVENT_CONN_ERROR     = KEVENT_BASE + 2,
    ISCSI_KEVENT_IF_ERROR       = KEVENT_BASE + 3,
    ISCSI_KEVENT_DESTROY_SESSION    = KEVENT_BASE + 4,
    ISCSI_KEVENT_UNBIND_SESSION = KEVENT_BASE + 5,
    ISCSI_KEVENT_CREATE_SESSION = KEVENT_BASE + 6,

    ISCSI_KEVENT_PATH_REQ       = KEVENT_BASE + 7,
    ISCSI_KEVENT_IF_DOWN        = KEVENT_BASE + 8,
    ISCSI_KEVENT_CONN_LOGIN_STATE   = KEVENT_BASE + 9,
    ISCSI_KEVENT_HOST_EVENT     = KEVENT_BASE + 10,
    ISCSI_KEVENT_PING_COMP      = KEVENT_BASE + 11,
};

enum iscsi_tgt_dscvr {
    ISCSI_TGT_DSCVR_SEND_TARGETS    = 1,
    ISCSI_TGT_DSCVR_ISNS        = 2,
    ISCSI_TGT_DSCVR_SLP     = 3,
};

enum iscsi_host_event_code {
    ISCSI_EVENT_LINKUP      = 1,
    ISCSI_EVENT_LINKDOWN,
    /* must always be last */
    ISCSI_EVENT_MAX,
};

struct iscsi_uevent {
    uint32_t type; /* k/u events type */
    uint32_t iferror; /* carries interface or resource errors */
    uint64_t transport_handle;

    union {
        /* messages u -> k */
        struct msg_create_session {
            uint32_t    initial_cmdsn;
            uint16_t    cmds_max;
            uint16_t    queue_depth;
        } c_session;
        struct msg_create_bound_session {
            uint64_t    ep_handle;
            uint32_t    initial_cmdsn;
            uint16_t    cmds_max;
            uint16_t    queue_depth;
        } c_bound_session;
        struct msg_destroy_session {
            uint32_t    sid;
        } d_session;
        struct msg_create_conn {
            uint32_t    sid;
            uint32_t    cid;
        } c_conn;
        struct msg_bind_conn {
            uint32_t    sid;
            uint32_t    cid;
            uint64_t    transport_eph;
            uint32_t    is_leading;
        } b_conn;
        struct msg_destroy_conn {
            uint32_t    sid;
            uint32_t    cid;
        } d_conn;
        struct msg_send_pdu {
            uint32_t    sid;
            uint32_t    cid;
            uint32_t    hdr_size;
            uint32_t    data_size;
        } send_pdu;
        struct msg_set_param {
            uint32_t    sid;
            uint32_t    cid;
            uint32_t    param; /* enum iscsi_param */
            uint32_t    len;
        } set_param;
        struct msg_start_conn {
            uint32_t    sid;
            uint32_t    cid;
        } start_conn;
        struct msg_stop_conn {
            uint32_t    sid;
            uint32_t    cid;
            uint64_t    conn_handle;
            uint32_t    flag;
        } stop_conn;
        struct msg_get_stats {
            uint32_t    sid;
            uint32_t    cid;
        } get_stats;
        struct msg_transport_connect {
            uint32_t    non_blocking;
        } ep_connect;
        struct msg_transport_connect_through_host {
            uint32_t    host_no;
            uint32_t    non_blocking;
        } ep_connect_through_host;
        struct msg_transport_poll {
            uint64_t    ep_handle;
            uint32_t    timeout_ms;
        } ep_poll;
        struct msg_transport_disconnect {
            uint64_t    ep_handle;
        } ep_disconnect;
        struct msg_tgt_dscvr {
            enum iscsi_tgt_dscvr    type;
            uint32_t    host_no;
            /*
             * enable = 1 to establish a new connection
             * with the server. enable = 0 to disconnect
             * from the server. Used primarily to switch
             * from one iSNS server to another.
             */
            uint32_t    enable;
        } tgt_dscvr;
        struct msg_set_host_param {
            uint32_t    host_no;
            uint32_t    param; /* enum iscsi_host_param */
            uint32_t    len;
        } set_host_param;
        struct msg_set_path {
            uint32_t    host_no;
        } set_path;
        struct msg_set_iface_params {
            uint32_t    host_no;
            uint32_t    count;
        } set_iface_params;
        struct msg_iscsi_ping {
            uint32_t        host_no;
            uint32_t        iface_num;
            uint32_t        iface_type;
            uint32_t        payload_size;
            uint32_t    pid;    /* unique ping id associated
                           with each ping request */
        } iscsi_ping;
        struct msg_get_chap {
            uint32_t    host_no;
            uint32_t    num_entries; /* number of CHAP entries
                              * on request, number of
                              * valid CHAP entries on
                              * response */
            uint16_t    chap_tbl_idx;
        } get_chap;
        struct msg_delete_chap {
               uint32_t        host_no;
               uint16_t        chap_tbl_idx;
        } delete_chap;
    } u;
    union {
        /* messages k -> u */
        int         retcode;
        struct msg_create_session_ret {
            uint32_t    sid;
            uint32_t    host_no;
        } c_session_ret;
        struct msg_create_conn_ret {
            uint32_t    sid;
            uint32_t    cid;
        } c_conn_ret;
        struct msg_unbind_session {
            uint32_t    sid;
            uint32_t    host_no;
        } unbind_session;
        struct msg_recv_req {
            uint32_t    sid;
            uint32_t    cid;
            uint64_t    recv_handle;
        } recv_req;
        struct msg_conn_login {
            uint32_t        sid;
            uint32_t        cid;
            uint32_t        state; /* enum iscsi_conn_state */
        } conn_login;
        struct msg_conn_error {
            uint32_t    sid;
            uint32_t    cid;
            uint32_t    error; /* enum iscsi_err */
        } connerror;
        struct msg_session_destroyed {
            uint32_t    host_no;
            uint32_t    sid;
        } d_session;
        struct msg_transport_connect_ret {
            uint64_t    handle;
        } ep_connect_ret;
        struct msg_req_path {
            uint32_t    host_no;
        } req_path;
        struct msg_notify_if_down {
            uint32_t    host_no;
        } notify_if_down;
        struct msg_host_event {
            uint32_t    host_no;
            uint32_t    data_size;
            enum iscsi_host_event_code code;
        } host_event;
        struct msg_ping_comp {
            uint32_t        host_no;
            uint32_t        status; /* enum
                         * iscsi_ping_status_code */
            uint32_t    pid;    /* unique ping id associated
                           with each ping request */
            uint32_t        data_size;
        } ping_comp;
    } r;
} __attribute__ ((aligned (sizeof(uint64_t))));

enum iscsi_param_type {
    ISCSI_PARAM,        /* iscsi_param (session, conn, target, LU) */
    ISCSI_HOST_PARAM,   /* iscsi_host_param */
    ISCSI_NET_PARAM,    /* iscsi_net_param */
};

struct iscsi_iface_param_info {
    uint32_t iface_num; /* iface number, 0 - n */
    uint32_t len;       /* Actual length of the param */
    uint16_t param;     /* iscsi param value */
    uint8_t iface_type; /* IPv4 or IPv6 */
    uint8_t param_type; /* iscsi_param_type */
    uint8_t value[0];   /* length sized value follows */
} __packed;

/*
 * To keep the struct iscsi_uevent size the same for userspace code
 * compatibility, the main structure for ISCSI_UEVENT_PATH_UPDATE and
 * ISCSI_KEVENT_PATH_REQ is defined separately and comes after the
 * struct iscsi_uevent in the NETLINK_ISCSI message.
 */
struct iscsi_path {
    uint64_t    handle;
    uint8_t     mac_addr[6];
    uint8_t     mac_addr_old[6];
    uint32_t    ip_addr_len;    /* 4 or 16 */
    union {
        struct in_addr  v4_addr;
        struct in6_addr v6_addr;
    } src;
    union {
        struct in_addr  v4_addr;
        struct in6_addr v6_addr;
    } dst;
    uint16_t    vlan_id;
    uint16_t    pmtu;
} __attribute__ ((aligned (sizeof(uint64_t))));

/* iscsi iface enabled/disabled setting */
#define ISCSI_IFACE_DISABLE 0x01
#define ISCSI_IFACE_ENABLE  0x02

/* ipv4 bootproto */
#define ISCSI_BOOTPROTO_STATIC      0x01
#define ISCSI_BOOTPROTO_DHCP        0x02

/* ipv6 addr autoconfig type */
#define ISCSI_IPV6_AUTOCFG_DISABLE      0x01
#define ISCSI_IPV6_AUTOCFG_ND_ENABLE        0x02
#define ISCSI_IPV6_AUTOCFG_DHCPV6_ENABLE    0x03

/* ipv6 link local addr type */
#define ISCSI_IPV6_LINKLOCAL_AUTOCFG_ENABLE 0x01
#define ISCSI_IPV6_LINKLOCAL_AUTOCFG_DISABLE    0x02

/* ipv6 router addr type */
#define ISCSI_IPV6_ROUTER_AUTOCFG_ENABLE    0x01
#define ISCSI_IPV6_ROUTER_AUTOCFG_DISABLE   0x02

#define ISCSI_IFACE_TYPE_IPV4       0x01
#define ISCSI_IFACE_TYPE_IPV6       0x02

#define ISCSI_MAX_VLAN_ID       4095
#define ISCSI_MAX_VLAN_PRIORITY     7

/* iscsi vlan enable/disabled setting */
#define ISCSI_VLAN_DISABLE  0x01
#define ISCSI_VLAN_ENABLE   0x02

/* iSCSI network params */
enum iscsi_net_param {
    ISCSI_NET_PARAM_IPV4_ADDR       = 1,
    ISCSI_NET_PARAM_IPV4_SUBNET     = 2,
    ISCSI_NET_PARAM_IPV4_GW         = 3,
    ISCSI_NET_PARAM_IPV4_BOOTPROTO      = 4,
    ISCSI_NET_PARAM_MAC         = 5,
    ISCSI_NET_PARAM_IPV6_LINKLOCAL      = 6,
    ISCSI_NET_PARAM_IPV6_ADDR       = 7,
    ISCSI_NET_PARAM_IPV6_ROUTER     = 8,
    ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG   = 9,
    ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG  = 10,
    ISCSI_NET_PARAM_IPV6_ROUTER_AUTOCFG = 11,
    ISCSI_NET_PARAM_IFACE_ENABLE        = 12,
    ISCSI_NET_PARAM_VLAN_ID         = 13,
    ISCSI_NET_PARAM_VLAN_PRIORITY       = 14,
    ISCSI_NET_PARAM_VLAN_ENABLED        = 15,
    ISCSI_NET_PARAM_VLAN_TAG        = 16,
    ISCSI_NET_PARAM_IFACE_TYPE      = 17,
    ISCSI_NET_PARAM_IFACE_NAME      = 18,
    ISCSI_NET_PARAM_MTU         = 19,
    ISCSI_NET_PARAM_PORT            = 20,
};

enum iscsi_conn_state {
    ISCSI_CONN_STATE_FREE,
    ISCSI_CONN_STATE_XPT_WAIT,
    ISCSI_CONN_STATE_IN_LOGIN,
    ISCSI_CONN_STATE_LOGGED_IN,
    ISCSI_CONN_STATE_IN_LOGOUT,
    ISCSI_CONN_STATE_LOGOUT_REQUESTED,
    ISCSI_CONN_STATE_CLEANUP_WAIT,
};

/*
 * Common error codes
 */
enum iscsi_err {
    ISCSI_OK            = 0,

    ISCSI_ERR_DATASN        = ISCSI_ERR_BASE + 1,
    ISCSI_ERR_DATA_OFFSET       = ISCSI_ERR_BASE + 2,
    ISCSI_ERR_MAX_CMDSN     = ISCSI_ERR_BASE + 3,
    ISCSI_ERR_EXP_CMDSN     = ISCSI_ERR_BASE + 4,
    ISCSI_ERR_BAD_OPCODE        = ISCSI_ERR_BASE + 5,
    ISCSI_ERR_DATALEN       = ISCSI_ERR_BASE + 6,
    ISCSI_ERR_AHSLEN        = ISCSI_ERR_BASE + 7,
    ISCSI_ERR_PROTO         = ISCSI_ERR_BASE + 8,
    ISCSI_ERR_LUN           = ISCSI_ERR_BASE + 9,
    ISCSI_ERR_BAD_ITT       = ISCSI_ERR_BASE + 10,
    ISCSI_ERR_CONN_FAILED       = ISCSI_ERR_BASE + 11,
    ISCSI_ERR_R2TSN         = ISCSI_ERR_BASE + 12,
    ISCSI_ERR_SESSION_FAILED    = ISCSI_ERR_BASE + 13,
    ISCSI_ERR_HDR_DGST      = ISCSI_ERR_BASE + 14,
    ISCSI_ERR_DATA_DGST     = ISCSI_ERR_BASE + 15,
    ISCSI_ERR_PARAM_NOT_FOUND   = ISCSI_ERR_BASE + 16,
    ISCSI_ERR_NO_SCSI_CMD       = ISCSI_ERR_BASE + 17,
    ISCSI_ERR_INVALID_HOST      = ISCSI_ERR_BASE + 18,
    ISCSI_ERR_XMIT_FAILED       = ISCSI_ERR_BASE + 19,
    ISCSI_ERR_TCP_CONN_CLOSE    = ISCSI_ERR_BASE + 20,
    ISCSI_ERR_SCSI_EH_SESSION_RST   = ISCSI_ERR_BASE + 21,
};

/*
 * iSCSI Parameters (RFC3720)
 */
enum iscsi_param {
    /* passed in using netlink set param */
    ISCSI_PARAM_MAX_RECV_DLENGTH,
    ISCSI_PARAM_MAX_XMIT_DLENGTH,
    ISCSI_PARAM_HDRDGST_EN,
    ISCSI_PARAM_DATADGST_EN,
    ISCSI_PARAM_INITIAL_R2T_EN,
    ISCSI_PARAM_MAX_R2T,
    ISCSI_PARAM_IMM_DATA_EN,
    ISCSI_PARAM_FIRST_BURST,
    ISCSI_PARAM_MAX_BURST,
    ISCSI_PARAM_PDU_INORDER_EN,
    ISCSI_PARAM_DATASEQ_INORDER_EN,
    ISCSI_PARAM_ERL,
    ISCSI_PARAM_IFMARKER_EN,
    ISCSI_PARAM_OFMARKER_EN,
    ISCSI_PARAM_EXP_STATSN,
    ISCSI_PARAM_TARGET_NAME,
    ISCSI_PARAM_TPGT,
    ISCSI_PARAM_PERSISTENT_ADDRESS,
    ISCSI_PARAM_PERSISTENT_PORT,
    ISCSI_PARAM_SESS_RECOVERY_TMO,

    /* passed in through bind conn using transport_fd */
    ISCSI_PARAM_CONN_PORT,
    ISCSI_PARAM_CONN_ADDRESS,

    ISCSI_PARAM_USERNAME,
    ISCSI_PARAM_USERNAME_IN,
    ISCSI_PARAM_PASSWORD,
    ISCSI_PARAM_PASSWORD_IN,

    ISCSI_PARAM_FAST_ABORT,
    ISCSI_PARAM_ABORT_TMO,
    ISCSI_PARAM_LU_RESET_TMO,
    ISCSI_PARAM_HOST_RESET_TMO,

    ISCSI_PARAM_PING_TMO,
    ISCSI_PARAM_RECV_TMO,

    ISCSI_PARAM_IFACE_NAME,
    ISCSI_PARAM_ISID,
    ISCSI_PARAM_INITIATOR_NAME,

    ISCSI_PARAM_TGT_RESET_TMO,
    ISCSI_PARAM_TARGET_ALIAS,

    ISCSI_PARAM_CHAP_IN_IDX,
    ISCSI_PARAM_CHAP_OUT_IDX,
    /* must always be last */
    ISCSI_PARAM_MAX,
};

/* iSCSI HBA params */
enum iscsi_host_param {
    ISCSI_HOST_PARAM_HWADDRESS,
    ISCSI_HOST_PARAM_INITIATOR_NAME,
    ISCSI_HOST_PARAM_NETDEV_NAME,
    ISCSI_HOST_PARAM_IPADDRESS,
    ISCSI_HOST_PARAM_PORT_STATE,
    ISCSI_HOST_PARAM_PORT_SPEED,
    ISCSI_HOST_PARAM_MAX,
};

/* iSCSI port Speed */
enum iscsi_port_speed {
    ISCSI_PORT_SPEED_UNKNOWN    = 0x1,
    ISCSI_PORT_SPEED_10MBPS     = 0x2,
    ISCSI_PORT_SPEED_100MBPS    = 0x4,
    ISCSI_PORT_SPEED_1GBPS      = 0x8,
    ISCSI_PORT_SPEED_10GBPS     = 0x10,
};

/* iSCSI port state */
enum iscsi_port_state {
    ISCSI_PORT_STATE_DOWN       = 0x1,
    ISCSI_PORT_STATE_UP     = 0x2,
};

/* iSCSI PING status/error code */
enum iscsi_ping_status_code {
    ISCSI_PING_SUCCESS          = 0,
    ISCSI_PING_FW_DISABLED          = 0x1,
    ISCSI_PING_IPADDR_INVALID       = 0x2,
    ISCSI_PING_LINKLOCAL_IPV6_ADDR_INVALID  = 0x3,
    ISCSI_PING_TIMEOUT          = 0x4,
    ISCSI_PING_INVALID_DEST_ADDR        = 0x5,
    ISCSI_PING_OVERSIZE_PACKET      = 0x6,
    ISCSI_PING_ICMP_ERROR           = 0x7,
    ISCSI_PING_MAX_REQ_EXCEEDED     = 0x8,
    ISCSI_PING_NO_ARP_RECEIVED      = 0x9,
};

#define iscsi_ptr(_handle) ((void*)(unsigned long)_handle)
#define iscsi_handle(_ptr) ((uint64_t)(unsigned long)_ptr)

/*
 * These flags presents iSCSI Data-Path capabilities.
 */
#define CAP_RECOVERY_L0     0x1
#define CAP_RECOVERY_L1     0x2
#define CAP_RECOVERY_L2     0x4
#define CAP_MULTI_R2T       0x8
#define CAP_HDRDGST     0x10
#define CAP_DATADGST        0x20
#define CAP_MULTI_CONN      0x40
#define CAP_TEXT_NEGO       0x80
#define CAP_MARKERS     0x100
#define CAP_FW_DB       0x200
#define CAP_SENDTARGETS_OFFLOAD 0x400   /* offload discovery process */
#define CAP_DATA_PATH_OFFLOAD   0x800   /* offload entire IO path */
#define CAP_DIGEST_OFFLOAD  0x1000  /* offload hdr and data digests */
#define CAP_PADDING_OFFLOAD 0x2000  /* offload padding insertion, removal,
                     and verification */
#define CAP_LOGIN_OFFLOAD   0x4000  /* offload session login */

/*
 * These flags describes reason of stop_conn() call
 */
#define STOP_CONN_TERM      0x1
#define STOP_CONN_SUSPEND   0x2
#define STOP_CONN_RECOVER   0x3

#define ISCSI_STATS_CUSTOM_MAX      32
#define ISCSI_STATS_CUSTOM_DESC_MAX 64
struct iscsi_stats_custom {
    char desc[ISCSI_STATS_CUSTOM_DESC_MAX];
    uint64_t value;
};

/*
 * struct iscsi_stats - iSCSI Statistics (iSCSI MIB)
 *
 * Note: this structure contains counters collected on per-connection basis.
 */
struct iscsi_stats {
    /* octets */
    uint64_t txdata_octets;
    uint64_t rxdata_octets;

    /* xmit pdus */
    uint32_t noptx_pdus;
    uint32_t scsicmd_pdus;
    uint32_t tmfcmd_pdus;
    uint32_t login_pdus;
    uint32_t text_pdus;
    uint32_t dataout_pdus;
    uint32_t logout_pdus;
    uint32_t snack_pdus;

    /* recv pdus */
    uint32_t noprx_pdus;
    uint32_t scsirsp_pdus;
    uint32_t tmfrsp_pdus;
    uint32_t textrsp_pdus;
    uint32_t datain_pdus;
    uint32_t logoutrsp_pdus;
    uint32_t r2t_pdus;
    uint32_t async_pdus;
    uint32_t rjt_pdus;

    /* errors */
    uint32_t digest_err;
    uint32_t timeout_err;

    /*
     * iSCSI Custom Statistics support, i.e. Transport could
     * extend existing MIB statistics with its own specific statistics
     * up to ISCSI_STATS_CUSTOM_MAX
     */
    uint32_t custom_length;
    struct iscsi_stats_custom custom[0]
        __attribute__ ((aligned (sizeof(uint64_t))));
};

enum chap_type_e {
    CHAP_TYPE_OUT,
    CHAP_TYPE_IN,
};

#define ISCSI_CHAP_AUTH_NAME_MAX_LEN    256
#define ISCSI_CHAP_AUTH_SECRET_MAX_LEN  256
struct iscsi_chap_rec {
    uint16_t chap_tbl_idx;
    enum chap_type_e chap_type;
    char username[ISCSI_CHAP_AUTH_NAME_MAX_LEN];
    uint8_t password[ISCSI_CHAP_AUTH_SECRET_MAX_LEN];
    uint8_t password_length;
};

#endif