/*

 * Copyright (C) 2017-2018 Red Hat, Inc.

 *

 * 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 3 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.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 *

 * Author: Gris Ge <fge@redhat.com>

 */

#ifndef _GNU_SOURCE

#define _GNU_SOURCE			/* For NI_MAXHOST */

#endif

#ifndef __ISCSI_OPEN_USR_IDBM_H__

#define __ISCSI_OPEN_USR_IDBM_H__

#include <stdio.h>

#include <stdbool.h>

#include <netdb.h>

#include "libopeniscsiusr/libopeniscsiusr_common.h"

#define ISCSI_CONFIG_ROOT	"/etc/iscsi/"

#define IFACE_CONFIG_DIR	ISCSI_CONFIG_ROOT"ifaces"

#define AUTH_STR_MAX_LEN	256

#define BOOT_NAME_MAXLEN	256

#define IDBM_DUMP_SIZE		8192

struct __DLL_LOCAL idbm;

struct idbm {

	int		refs;

};

enum iscsi_auth_method {

	ISCSI_AUTH_METHOD_NONE,

	ISCSI_AUTH_METHOD_CHAP,

};

enum iscsi_chap_algs {

	ISCSI_AUTH_CHAP_ALG_MD5 = 5,

	ISCSI_AUTH_CHAP_ALG_SHA1 = 6,

	ISCSI_AUTH_CHAP_ALG_SHA256 = 7,

	ISCSI_AUTH_CHAP_ALG_SHA3_256 = 8,

	AUTH_CHAP_ALG_MAX_COUNT = 5,

};

enum iscsi_startup_type {

	ISCSI_STARTUP_MANUAL,

	ISCSI_STARTUP_AUTOMATIC,

	ISCSI_STARTUP_ONBOOT,

};

enum discovery_type {

	DISCOVERY_TYPE_SENDTARGETS,

	DISCOVERY_TYPE_ISNS,

	DISCOVERY_TYPE_OFFLOAD_SENDTARGETS,

	DISCOVERY_TYPE_SLP,

	DISCOVERY_TYPE_STATIC,

	DISCOVERY_TYPE_FW,

};

enum leading_login_type {

	LEADING_LOGIN_NO,

	LEADING_LOGIN_YES,

};

enum init_scan_type {

	INIT_SCAN_MANUAL,

	INIT_SCAN_AUTO,

};

enum digest_type {

	DIGEST_NEVER,

	DIGEST_ALWAYS,

	DIGEST_PREFER_ON,

	DIGEST_PREFER_OFF,

};

/* all authentication-related options should be added to this structure.

 * this structure is per-session, and can be configured

 * by TargetName but not Subnet.

 */

struct iscsi_auth_config {

	enum iscsi_auth_method			authmethod;

	char					username[AUTH_STR_MAX_LEN];

	unsigned char				password[AUTH_STR_MAX_LEN];

	uint32_t				password_length;

	char					username_in[AUTH_STR_MAX_LEN];

	unsigned char				password_in[AUTH_STR_MAX_LEN];

	uint32_t				password_in_length;

	unsigned int				chap_algs[AUTH_CHAP_ALG_MAX_COUNT];

};

/* all TCP options go in this structure.

 * this structure is per-portal, and can be configured

 * both by TargetName and Subnet.

 */

struct iscsi_tcp_config {

	int64_t					window_size;

	int64_t					type_of_service;

	/* ^ try to set IP TOS bits */

};

/* all per-session timeouts go in this structure.

 * this structure is per-session, and can be configured

 * by TargetName but not by Subnet.

 */

struct iscsi_session_tmo_cfg {

	int64_t					replacement_timeout;

};

/* all error handling timeouts go in this structure.

 * this structure is per-portal, and can be configured

 * both by TargetName and Subnet.

 */

struct iscsi_error_tmo_cfg {

	int64_t					abort_timeout;

	int64_t					host_reset_timeout;

	int64_t					lu_reset_timeout;

	int64_t					tgt_reset_timeout;

};

/* all per-connection timeouts go in this structure.

 * this structure is per-portal, and can be configured

 * both by TargetName and Subnet.

 */

struct iscsi_conn_tmo_cfg {

	int64_t					login_timeout;

	int64_t					logout_timeout;

	int64_t					auth_timeout;

	int64_t					active_timeout;

	int64_t					noop_out_interval;

	int64_t					noop_out_timeout;

};

struct iscsi_conn_op_cfg {

	int64_t					MaxRecvDataSegmentLength;

	int64_t					MaxXmitDataSegmentLength;

	enum digest_type			HeaderDigest;

	enum digest_type			DataDigest;

	bool					IFMarker;

	bool					OFMarker;

};

struct iscsi_conn {

	enum iscsi_startup_type			startup;

	char					address[NI_MAXHOST];

	int32_t					port;

	struct iscsi_tcp_config			tcp;

	struct iscsi_conn_tmo_cfg		tmo;

	struct iscsi_conn_op_cfg		op_cfg;

	bool					is_ipv6;

};

/* all iSCSI operational params go in this structure.

 * this structure is per-portal, and can be configured

 * both by TargetName and Subnet.

 */

struct iscsi_session_op_cfg {

	int64_t					DataPDUInOrder;

	int64_t					DataSequenceInOrder;

	int64_t					protocol;

	bool					InitialR2T;

	bool					ImmediateData;

	int64_t					FirstBurstLength;

	int64_t					MaxBurstLength;

	int64_t					DefaultTime2Wait;

	int64_t					DefaultTime2Retain;

	int64_t					MaxConnections;

	int64_t					MaxOutstandingR2T;

	int64_t					ERL;

	bool					FastAbort;

};

struct iscsi_session_idbm {

	uint32_t				initial_cmdsn;

	int64_t					reopen_max;

	int64_t					initial_login_retry_max;

	int64_t					xmit_thread_priority;

	uint16_t				cmds_max;

	uint16_t				queue_depth;

	int64_t					nr_sessions;

	enum init_scan_type			scan;

	struct iscsi_auth_config		auth;

	struct iscsi_session_tmo_cfg		tmo;

	struct iscsi_error_tmo_cfg		err_tmo;

	struct iscsi_session_op_cfg		op_cfg;

	struct iscsi_session			*se;

	uint32_t				sid;

	/*

	 * This is a flag passed to iscsid.  If set, multiple sessions are

	 * allowed to be initiated on this record

	 */

	unsigned char				multiple;

	char					boot_root[BOOT_NAME_MAXLEN];

	char					boot_nic[BOOT_NAME_MAXLEN];

	char					boot_target[BOOT_NAME_MAXLEN];

};

__DLL_LOCAL struct idbm *_idbm_new(void);

__DLL_LOCAL void _idbm_free(struct idbm *db);

__DLL_LOCAL int _idbm_lock(struct iscsi_context *ctx);

__DLL_LOCAL void _idbm_unlock(struct iscsi_context *ctx);

__DLL_LOCAL void _idbm_iface_print(struct iscsi_iface *iface, FILE *f);

__DLL_LOCAL int _idbm_iface_get(struct iscsi_context *ctx,

				const char *iface_name,

				struct iscsi_iface **iface);

__DLL_LOCAL int _idbm_node_get(struct iscsi_context *ctx,

				const char *target_name,

				const char *portal,

				const char *iface_name,

				struct iscsi_node **node);

__DLL_LOCAL void _idbm_node_print(struct iscsi_node *node, FILE *f,

				  bool show_secret);

#endif /* End of __ISCSI_OPEN_USR_IDBM_H__ */