/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _ISCSI_DOOR_H
#define _ISCSI_DOOR_H

#ifdef __cplusplus
extern "C" {
#endif

#define ISCSI_DOOR_REQ_SIGNATURE        0x53435349
#define ISCSI_DOOR_REQ_VERSION_1        1
#define ISCSI_DOOR_MAX_DATA_SIZE        8192


#define ISCSI_DOOR_GETIPNODEBYNAME_REQ  0x0000
#define ISCSI_DOOR_GETIPNODEBYNAME_CNF  0x4000
#define ISCSI_DOOR_ERROR_IND            0x8000

#define ISCSI_DOOR_STATUS_SUCCESS       0x00000000
#define ISCSI_DOOR_STATUS_REQ_LENGTH    0x00000001
#define ISCSI_DOOR_STATUS_REQ_FORMAT    0x00000002
#define ISCSI_DOOR_STATUS_REQ_INVALID   0x00000003
#define ISCSI_DOOR_STATUS_REQ_VERSION   0x00000004
#define ISCSI_DOOR_STATUS_MORE          0x00000005

typedef struct _iscsi_door_msg_hdr {
        uint32_t                signature;
        uint32_t                version;
        uint32_t                opcode;
        uint32_t                status;
} iscsi_door_msg_hdr_t;

typedef struct _getipnodebyname_req {
        iscsi_door_msg_hdr_t    hdr;
        uint32_t                name_offset;
        uint32_t                name_length;
        uint32_t                af;
        uint32_t                flags;
} getipnodebyname_req_t;

typedef struct _getipnodebyname_cnf {
        iscsi_door_msg_hdr_t    hdr;
        uint32_t                h_size_needed;
        uint32_t                h_addr_list_offset;
        uint32_t                h_addr_list_length;
        uint32_t                h_addrtype;
        uint32_t                h_addrlen;
        uint32_t                h_name_offset;
        uint32_t                h_name_len;
        uint32_t                h_alias_list_offset;
        uint32_t                h_alias_list_length;
        int32_t                 error_num;
} getipnodebyname_cnf_t;

typedef union _iscsi_door_req {
        iscsi_door_msg_hdr_t    hdr;
        getipnodebyname_req_t   ginbn_req;
} iscsi_door_req_t;

typedef union _iscsi_door_cnf {
        iscsi_door_msg_hdr_t    hdr;
        getipnodebyname_cnf_t   ginbn_cnf;
} iscsi_door_cnf_t;

typedef union _iscsi_door_ind {
        iscsi_door_msg_hdr_t    hdr;
        iscsi_door_msg_hdr_t    error_ind;
} iscsi_door_ind_t;

typedef union _iscsi_door_msg {
        iscsi_door_msg_hdr_t    hdr;
        iscsi_door_req_t        req;
        iscsi_door_cnf_t        cnf;
        iscsi_door_ind_t        ind;
} iscsi_door_msg_t;

#ifdef _KERNEL

/* Defines copied from netdb.h */
#define HOST_NOT_FOUND  1 /* Authoritive Answer Host not found */
#define TRY_AGAIN       2 /* Non-Authoritive Host not found, or SERVERFAIL */
#define NO_RECOVERY     3 /* Non recoverable errors,FORMERR,REFUSED,NOTIMP */
#define NO_DATA         4 /* Valid name, no data record of requested type */
#define NO_ADDRESS      NO_DATA /* no address, look for MX record */

#define AI_V4MAPPED     0x0001 /* IPv4 mapped addresses if no IPv6 */
#define AI_ALL          0x0002 /* IPv6 and IPv4 mapped addresses */
#define AI_ADDRCONFIG   0x0004 /* AAAA or A records only if IPv6/IPv4 cnfgd */

struct  hostent {
        char    *h_name;        /* official name of host */
        char    **h_aliases;    /* alias list */
        int     h_addrtype;     /* host address type */
        int     h_length;       /* length of address */
        char    **h_addr_list;  /* list of addresses from name server */
};

boolean_t
iscsi_door_ini(void);

boolean_t
iscsi_door_term(void);

boolean_t
iscsi_door_bind(
        int             did
);

void
iscsi_door_unbind(void);

void
kfreehostent(
        struct hostent  *hptr
);

struct hostent *
kgetipnodebyname(
        const char      *name,
        int             af,
        int             flags,
        int             *error_num
);

#else   /* !_KERNEL */

#define kfreehostent            freehostent
#define kgetipnodebyname        getipnodebyname

#endif  /* _KERNEL */

/*
 * iSCSI initiator SMF service status in kernel
 */
#define ISCSI_SERVICE_ENABLED           0x0
#define ISCSI_SERVICE_DISABLED          0x1
#define ISCSI_SERVICE_TRANSITION        0x2

#ifdef __cplusplus
}
#endif

#endif /* _ISCSI_DOOR_H */