229 lines
6.3 KiB
C
229 lines
6.3 KiB
C
/* $NetBSD: isns_pdu.h,v 1.3 2011/11/28 12:44:18 joerg Exp $ */
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/*-
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* Copyright (c) 2004,2009 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* isns_pdu.h
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*/
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#ifndef _ISNS_PDU_H_
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#define _ISNS_PDU_H_
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#include <pthread.h>
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#include <string.h>
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#include "isns_defs.h"
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#include "isns_util.h"
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#define ISNSP_VERSION (0x0001)
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/*
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* Max PDU payload length (MUST be <= 65532 and a multiple of 4).
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*/
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#define ISNS_MAX_PDU_PAYLOAD 65532
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/*
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* ISNS buffer pool defines.
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*/
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#define ISNS_BUF_SIZE 1024
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#define ISNS_BUF_COUNT 32
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#define ISNS_SMALL_BUF_SIZE \
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(/* CONSTCOND */MAX(sizeof(struct isns_task_s), sizeof(struct isns_trans_s)))
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#define ISNS_SMALL_BUF_COUNT 32
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#define ISNS_BUF_POOL 1
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#define ISNS_BUF_MALLOC 2
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#define ISNS_BUF_STATIC 3
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/*
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* ISNS_INIT_BUFFER - initialize buffer (pointer) provided as an isns_buffer_s,
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* setting the length and type specified, and initializing
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* other members to appropriate values.
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*/
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#define ISNS_INIT_BUFFER(_bufp, _len, _type) \
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do if ((_bufp) != NULL) { \
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((struct isns_buffer_s *)(_bufp))->cur_len = 0; \
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((struct isns_buffer_s *)(_bufp))->alloc_len = (_len); \
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((struct isns_buffer_s *)(_bufp))->alloc_len &= ~0x03; \
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((struct isns_buffer_s *)(_bufp))->buf_type = (_type); \
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((struct isns_buffer_s *)(_bufp))->next = NULL; \
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} while (/* CONSTCOND */0)
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/*
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* ISNS buffer struct - used for trans, pdu, payload allocations in libisns.
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*/
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struct isns_buffer_s {
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uint32_t cur_len;
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uint32_t alloc_len;
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int buf_type;
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struct isns_buffer_s *next;
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};
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#define isns_buffer_data(_bufp, _ofs) \
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(void *)(((uint8_t *)(void *)(_bufp+1))+(_ofs))
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void isns_init_buffer_pool(void);
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int isns_add_buffer_pool(int, int);
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void isns_destroy_buffer_pool(void);
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struct isns_buffer_s *isns_new_buffer(int);
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void isns_free_buffer(struct isns_buffer_s *);
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/*
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* TLV buffer access/manipulation-related macros.
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*/
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#define ISNS_TLV_HDR_SIZE (sizeof(uint32_t) * 2)
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#define ISNS_PAD4_LEN(n) (uint32_t)(((n)+3) & ~0x03)
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#define ISNS_PAD4_BYTES(n) ((4 - ((n) & 0x03)) & 0x03)
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static inline uint32_t ISNS_TLV_GET_TAG(const void *buf) {
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uint32_t tag;
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memcpy(&tag, buf, sizeof(tag));
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return isns_ntohl(tag);
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}
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static inline void ISNS_TLV_SET_TAG(void *buf, uint32_t tag) {
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tag = isns_htonl(tag);
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memcpy(buf, &tag, sizeof(tag));
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}
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static inline uint32_t ISNS_TLV_GET_LEN(const void *buf) {
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uint32_t len;
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memcpy(&len, (const uint8_t *)buf + sizeof(len), sizeof(len));
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return isns_ntohl(len);
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}
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static inline void ISNS_TLV_SET_LEN(void *buf, uint32_t len) {
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len = isns_htonl(len);
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memcpy((uint8_t *)buf + sizeof(len), &len, sizeof(len));
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}
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static inline void *ISNS_TLV_DATA_PTR(void *buf) {
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return (uint8_t *)buf + ISNS_TLV_HDR_SIZE;
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}
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/*
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* ISNS transaction and PDU structs.
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*/
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#define ISNS_TRANSF_COMPLETE 0x000000001
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#define ISNS_TRANSF_FREE_WHEN_COMPLETE 0x000000002
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struct isns_refresh_s {
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char node[225];
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int interval;
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struct isns_trans_s *trans_p;
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};
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struct isns_get_tlv_info_s {
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struct isns_pdu_s *pdu_p;
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struct isns_buffer_s *buf_p;
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struct isns_buffer_s *extra_buf_list;
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int buf_ofs;
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};
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struct isns_trans_s {
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uint16_t id;
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uint16_t func_id;
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uint32_t flags;
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struct isns_config_s *cfg_p;
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struct isns_get_tlv_info_s get_tlv_info;
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struct isns_pdu_s *pdu_req_list;
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struct isns_pdu_s *pdu_rsp_list;
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uint16_t disconnect_cnt;
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};
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struct isns_pdu_hdr_s {
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uint16_t isnsp_version __packed;
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uint16_t func_id __packed;
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uint16_t payload_len __packed;
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uint16_t flags __packed;
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uint16_t trans_id __packed;
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uint16_t seq_id __packed;
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};
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struct isns_pdu_s {
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struct isns_config_s *cfg_p;
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struct isns_pdu_hdr_s hdr;
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int byteorder_host;
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struct isns_buffer_s *payload_p;
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struct isns_pdu_s *next;
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};
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#define isns_get_pdu_request(_trans) \
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(((_trans) == ISNS_INVALID_TRANS) \
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? NULL : ((struct isns_trans_s *)(_trans))->pdu_req_list)
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#define isns_get_pdu_response(_trans) \
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(((_trans) == ISNS_INVALID_TRANS) \
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? NULL : ((struct isns_trans_s *)(_trans))->pdu_rsp_list)
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#define isns_get_next_pdu(_pdu) \
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(((_pdu) == NULL) ? NULL : ((struct isns_pdu_s *)(_pdu))->next)
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#define isns_get_trans_flags(_trans) \
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isns_set_trans_flags((_trans), 0)
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void isns_complete_trans(struct isns_trans_s *);
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int isns_abort_trans(struct isns_config_s *, uint16_t);
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uint32_t isns_set_trans_flags(struct isns_trans_s *, uint32_t);
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void isns_add_pdu_request(struct isns_trans_s *, struct isns_pdu_s *);
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void isns_add_pdu_response(struct isns_trans_s *, struct isns_pdu_s *);
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struct isns_pdu_s *isns_get_pdu_request_tail(struct isns_trans_s *);
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int isns_get_pdu_response_status(struct isns_trans_s *, uint32_t *);
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struct isns_pdu_s *isns_new_pdu(struct isns_config_s *, uint16_t, uint16_t,
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uint16_t);
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void isns_free_pdu(struct isns_pdu_s *);
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int isns_send_pdu(ISNS_TRANS, struct isns_pdu_s *, const struct timespec *);
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#ifdef ISNS_DEBUG
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#define DUMP_PDU(_pdu) isns_dump_pdu(_pdu)
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void isns_dump_pdu(struct isns_pdu_s *);
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#else
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#define DUMP_PDU(_pdu)
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#endif
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#endif /* !_ISNS_PDU_H_ */
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