/* * Copyright (C) 2002-2003 Ardis Technolgies <roman@ardistech.com> * * Released under the terms of the GNU GPL v2.0. */#ifndef ISCSI_HDR_H#define ISCSI_HDR_H#define ISCSI_VERSION			0#define __packed __attribute__ ((packed))struct iscsi_hdr {	u8  opcode;			/* 0 */	u8  flags;	u8  spec1[2];	u8  ahslength;			/* 4 */	u8  datalength[3];	u16 lun[4];			/* 8 */	u32 itt;			/* 16 */	u32 ttt;			/* 20 */	u32 sn;				/* 24 */	u32 exp_sn;			/* 28 */	u32 max_sn;			/* 32 */	u32 spec3[3];			/* 36 */} __packed;				/* 48 *//* Opcode encoding bits */#define ISCSI_OP_RETRY			0x80#define ISCSI_OP_IMMEDIATE		0x40#define ISCSI_OPCODE_MASK		0x3F/* Client to Server Message Opcode values */#define ISCSI_OP_NOOP_OUT		0x00#define ISCSI_OP_SCSI_CMD		0x01#define ISCSI_OP_SCSI_TASK_MGT_MSG	0x02#define ISCSI_OP_LOGIN_CMD		0x03#define ISCSI_OP_TEXT_CMD		0x04#define ISCSI_OP_SCSI_DATA		0x05#define ISCSI_OP_LOGOUT_CMD		0x06#define ISCSI_OP_SNACK_CMD		0x10/* Server to Client Message Opcode values */#define ISCSI_OP_NOOP_IN		0x20#define ISCSI_OP_SCSI_RSP		0x21#define ISCSI_OP_SCSI_TASK_MGT_RSP	0x22#define ISCSI_OP_LOGIN_RSP		0x23#define ISCSI_OP_TEXT_RSP		0x24#define ISCSI_OP_SCSI_DATA_RSP		0x25#define ISCSI_OP_LOGOUT_RSP		0x26#define ISCSI_OP_R2T_RSP		0x31#define ISCSI_OP_ASYNC_EVENT		0x32#define ISCSI_OP_REJECT_MSG		0x3fstruct iscsi_ahs_hdr {	u16 ahslength;	u8 ahstype;} __packed;#define ISCSI_AHSTYPE_CDB		1#define ISCSI_AHSTYPE_RLENGTH		2union iscsi_sid {	struct {		u8 isid[6];		/* Initiator Session ID */		u16 tsih;		/* Target Session ID */	} id;	u64 id64;} __packed;struct iscsi_text_req_hdr {	u8  opcode;	u8  flags;	u16 rsvd1;	u8  ahslength;	u8  datalength[3];	u32 rsvd2[2];	u32 itt;	u32 ttt;	u32 cmd_sn;	u32 exp_stat_sn;	u32 rsvd3[4];} __packed;struct iscsi_text_rsp_hdr {	u8  opcode;	u8  flags;	u16 rsvd1;	u8  ahslength;	u8  datalength[3];	u32 rsvd2[2];	u32 itt;	u32 ttt;	u32 stat_sn;	u32 exp_cmd_sn;	u32 max_cmd_sn;	u32 rsvd3[3];} __packed;struct iscsi_login_req_hdr {	u8  opcode;	u8  flags;	u8  max_version;		/* Max. version supported */	u8  min_version;		/* Min. version supported */	u8  ahslength;	u8  datalength[3];	union iscsi_sid sid;	u32 itt;			/* Initiator Task Tag */	u16 cid;			/* Connection ID */	u16 rsvd1;	u32 cmd_sn;	u32 exp_stat_sn;	u32 rsvd2[4];} __packed;struct iscsi_login_rsp_hdr {	u8  opcode;	u8  flags;	u8  max_version;		/* Max. version supported */	u8  active_version;		/* Active version */	u8  ahslength;	u8  datalength[3];	union iscsi_sid sid;	u32 itt;			/* Initiator Task Tag */	u32 rsvd1;	u32 stat_sn;	u32 exp_cmd_sn;	u32 max_cmd_sn;	u8  status_class;		/* see Login RSP ststus classes below */	u8  status_detail;		/* see Login RSP Status details below */	u8  rsvd2[10];} __packed;#define ISCSI_FLG_FINAL			0x80#define ISCSI_FLG_TRANSIT		0x80#define ISCSI_FLG_CSG_SECURITY		0x00#define ISCSI_FLG_CSG_LOGIN		0x04#define ISCSI_FLG_CSG_FULL_FEATURE	0x0c#define ISCSI_FLG_CSG_MASK		0x0c#define ISCSI_FLG_NSG_SECURITY		0x00#define ISCSI_FLG_NSG_LOGIN		0x01#define ISCSI_FLG_NSG_FULL_FEATURE	0x03#define ISCSI_FLG_NSG_MASK		0x03/* Login Status response classes */#define ISCSI_STATUS_SUCCESS		0x00#define ISCSI_STATUS_REDIRECT		0x01#define ISCSI_STATUS_INITIATOR_ERR	0x02#define ISCSI_STATUS_TARGET_ERR		0x03/* Login Status response detail codes *//* Class-0 (Success) */#define ISCSI_STATUS_ACCEPT		0x00/* Class-1 (Redirection) */#define ISCSI_STATUS_TGT_MOVED_TEMP	0x01#define ISCSI_STATUS_TGT_MOVED_PERM	0x02/* Class-2 (Initiator Error) */#define ISCSI_STATUS_INIT_ERR		0x00#define ISCSI_STATUS_AUTH_FAILED	0x01#define ISCSI_STATUS_TGT_FORBIDDEN	0x02#define ISCSI_STATUS_TGT_NOT_FOUND	0x03#define ISCSI_STATUS_TGT_REMOVED	0x04#define ISCSI_STATUS_NO_VERSION		0x05#define ISCSI_STATUS_TOO_MANY_CONN	0x06#define ISCSI_STATUS_MISSING_FIELDS	0x07#define ISCSI_STATUS_CONN_ADD_FAILED	0x08#define ISCSI_STATUS_INV_SESSION_TYPE	0x09#define ISCSI_STATUS_SESSION_NOT_FOUND	0x0a#define ISCSI_STATUS_INV_REQ_TYPE	0x0b/* Class-3 (Target Error) */#define ISCSI_STATUS_TARGET_ERROR	0x00#define ISCSI_STATUS_SVC_UNAVAILABLE	0x01#define ISCSI_STATUS_NO_RESOURCES	0x02struct iscsi_logout_req_hdr {	u8  opcode;	u8  flags;	u16 rsvd1;	u8  ahslength;	u8  datalength[3];	u32 rsvd2[2];	u32 itt;	u16 cid;	u16 rsvd3;	u32 cmd_sn;	u32 exp_stat_sn;	u32 rsvd4[4];} __packed;struct iscsi_logout_rsp_hdr {	u8  opcode;	u8  flags;	u8  response;	u8  rsvd1;	u8  ahslength;	u8  datalength[3];	u32 rsvd2[2];	u32 itt;	u32 rsvd3;	u32 stat_sn;	u32 exp_cmd_sn;	u32 max_cmd_sn;	u32 rsvd4;	u16 time2wait;	u16 time2retain;	u32 rsvd5;} __packed;#endif	/* ISCSI_HDR_H */