/*
 * 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 (c) 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2016, Chris Fraire <cfraire@me.com>.
 * Copyright 2021 Tintri by DDN, Inc. All rights reserved.
 */

#ifndef _IPMGMT_IMPL_H
#define _IPMGMT_IMPL_H

#ifdef  __cplusplus
extern "C" {
#endif

#include <net/if.h>
#include <libnvpair.h>
#include <libipadm.h>
#include <ipadm_ipmgmt.h>
#include <syslog.h>
#include <pthread.h>
#include <libscf.h>

#define IPMGMT_STRSIZE          256
#define IPMGMTD_FMRI            "svc:/network/ip-interface-management:default"

/* ipmgmt_door.c */
extern void     ipmgmt_handler(void *, char *, size_t, door_desc_t *, uint_t);

/* ipmgmt_util.c */
extern void     ipmgmt_log(int, const char *, ...);
extern int      ipmgmt_cpfile(const char *, const char *, boolean_t);

/* ipmgmt_persist.c */
extern boolean_t ipmgmt_persist_if_exists(const char *, sa_family_t);
extern void ipmgmt_get_group_interface(const char *, char *, size_t);

/*
 * following are the list of DB walker callback functions and the callback
 * arguments for each of the callback functions used by the daemon
 */
/* following functions take 'ipmgmt_prop_arg_t' as the callback argument */
extern db_wfunc_t       ipmgmt_db_getprop, ipmgmt_db_resetprop;

/* following functions take ipadm_dbwrite_cbarg_t as callback argument */
extern db_wfunc_t       ipmgmt_db_add, ipmgmt_db_update, ipmgmt_db_update_if;

typedef struct {
        char    *cb_ifname;
        char    *cb_aobjname;
        nvlist_t        *cb_onvl;
        int     cb_ocnt;
} ipmgmt_get_cbarg_t;
extern db_wfunc_t       ipmgmt_db_getif;
extern db_wfunc_t       ipmgmt_db_getaddr;

typedef struct {
        sa_family_t     cb_family;
        char            *cb_ifname;
        boolean_t       cb_ipv4exists;
        boolean_t       cb_ipv6exists;
} ipmgmt_if_cbarg_t;
extern db_wfunc_t       ipmgmt_db_setif, ipmgmt_db_resetif;

typedef struct {
        char            *cb_aobjname;
} ipmgmt_resetaddr_cbarg_t;
extern db_wfunc_t       ipmgmt_db_resetaddr;

typedef struct {
        sa_family_t     cb_family;
        nvlist_t        *cb_invl;
        nvlist_t        *cb_onvl;
        int             cb_ocnt;
} ipmgmt_initif_cbarg_t;
extern db_wfunc_t       ipmgmt_db_initif;

/*
 * A linked list of address object nodes. Each node in the list tracks
 * following information for the address object identified by `am_aobjname'.
 *      - interface on which the address is created
 *      - logical interface number on which the address is created
 *      - address family
 *      - `am_nextnum' identifies the next number to use to generate user part
 *        of `aobjname'.
 *      - address type (static, dhcp or addrconf)
 *      - `am_flags' indicates if this addrobj in active and/or persist config
 *      - other, ipadm_addr_type_t-specific values are cached in
 *        am_addr_cache (see type ipmgmt_addr_cache_u):
 *        -     ipv6: ipmgmt_am_linklocal (macro)
 *        -     ipv6: ipmgmt_am_ifid (macro)
 *        -     dhcp: ipmgmt_am_reqhost (macro)
 */
typedef struct ipmgmt_aobjmap_s {
        struct ipmgmt_aobjmap_s *am_next;
        char                    am_aobjname[IPADM_AOBJSIZ];
        char                    am_ifname[LIFNAMSIZ];
        int32_t                 am_lnum;
        sa_family_t             am_family;
        ipadm_addr_type_t       am_atype;
        uint32_t                am_nextnum;
        uint32_t                am_flags;
        ipmgmt_addr_type_cache_u        am_atype_cache;
} ipmgmt_aobjmap_t;

#define ipmgmt_am_linklocal \
    am_atype_cache.ipmgmt_ipv6_cache_s.ipmgmt_linklocal
#define ipmgmt_am_ifid \
    am_atype_cache.ipmgmt_ipv6_cache_s.ipmgmt_ifid
#define ipmgmt_am_reqhost \
    am_atype_cache.ipmgmt_dhcp_cache_s.ipmgmt_reqhost

/* linked list of `aobjmap' nodes, protected by RW lock */
typedef struct ipmgmt_aobjmap_list_s {
        ipmgmt_aobjmap_t        *aobjmap_head;
        pthread_rwlock_t        aobjmap_rwlock;
} ipmgmt_aobjmap_list_t;

/* global `aobjmap' defined in ipmgmt_main.c */
extern ipmgmt_aobjmap_list_t aobjmap;

/* operations on the `aobjmap' linked list */
#define ADDROBJ_ADD             0x00000001
#define ADDROBJ_DELETE          0x00000002
#define ADDROBJ_LOOKUPADD       0x00000004
#define ADDROBJ_SETLIFNUM       0x00000008

/* Permanent data store for ipadm */
#define IPADM_DB_FILE           "/etc/ipadm/ipadm.conf"
#define IPADM_FILE_MODE         (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)

/*
 * With the initial integration of the daemon (PSARC 2010/080), the version
 * of the ipadm data-store (/etc/ipadm/ipadm.conf) was 0. A subsequent fix
 * needed an upgrade to the data-store and we bumped the version to 1.
 */
#define IPADM_DB_VERSION        1

/*
 * A temporary file created in SMF volatile filesystem. This file captures the
 * in-memory copy of list `aobjmap' on disk. This is done to recover from
 * daemon reboot (using svcadm) or crashes.
 */
#define IPADM_TMPFS_DIR         "/etc/svc/volatile/ipadm"
#define ADDROBJ_MAPPING_DB_FILE IPADM_TMPFS_DIR"/aobjmap.conf"

/*
 * A temporary copy of the ipadm configuration file might need
 * to be created if write requests are encountered during boottime
 * and the root filesystem is mounted read-only.
 */
#define IPADM_VOL_DB_FILE       IPADM_TMPFS_DIR"/ipadm.conf"

/* SCF resources required to interact with svc.configd */
typedef struct scf_resources {
        scf_handle_t            *sr_handle;
        scf_instance_t          *sr_inst;
        scf_propertygroup_t     *sr_pg;
        scf_property_t          *sr_prop;
        scf_value_t             *sr_val;
        scf_transaction_t       *sr_tx;
        scf_transaction_entry_t *sr_ent;
} scf_resources_t;

extern int              ipmgmt_update_family_nvp(nvlist_t *,
                            sa_family_t, uint_t);
extern int              ipmgmt_db_walk(db_wfunc_t *, void *, ipadm_db_op_t);
extern int              ipmgmt_aobjmap_op(ipmgmt_aobjmap_t *, uint32_t);
extern boolean_t        ipmgmt_aobjmap_init(void *, nvlist_t *, char *,
                            size_t, int *);
extern int              ipmgmt_persist_aobjmap(ipmgmt_aobjmap_t *,
                            ipadm_db_op_t);
extern boolean_t        ipmgmt_ngz_firstboot_postinstall();
extern int              ipmgmt_persist_if(ipmgmt_if_arg_t *);
extern void             ipmgmt_init_prop();
extern boolean_t        ipmgmt_db_upgrade(void *, nvlist_t *, char *,
                            size_t, int *);
extern int              ipmgmt_create_scf_resources(const char *,
                            scf_resources_t *);
extern void             ipmgmt_release_scf_resources(scf_resources_t *);
extern boolean_t        ipmgmt_needs_upgrade(scf_resources_t *);
extern void             ipmgmt_update_dbver(scf_resources_t *);

#ifdef  __cplusplus
}
#endif

#endif  /* _IPMGMT_IMPL_H */