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/* Copyright 2015 Baruch Even
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#ifndef LIBSCSICMD_EXTENDED_INQUIRY_H
#define LIBSCSICMD_EXTENDED_INQUIRY_H
#include <stdint.h>
#define EVPD_MIN_LEN 4
static inline uint8_t evpd_peripheral_qualifier(uint8_t *data)
{
return data[0] >> 5;
}
static inline uint8_t evpd_peripheral_device_type(uint8_t *data)
{
return data[0] & 0x1F;
}
static inline uint8_t evpd_page_code(uint8_t *data)
{
return data[1];
}
static inline uint16_t evpd_page_len(uint8_t *data)
{
return (data[2] << 8) | data[3];
}
static inline uint8_t *evpd_page_data(uint8_t *data)
{
return data + EVPD_MIN_LEN;
}
static inline bool evpd_is_ascii_page(uint8_t page_code)
{
return 0x01 <= page_code && page_code <= 0x7F;
}
/* This should be called with the body of the EVPD data and not the full (i.e. with the output of evpd_page_data()) */
static inline uint16_t evpd_ascii_len(uint8_t *evpd_body)
{
return (evpd_body[0] << 8) | evpd_body[1];
}
static inline uint8_t *evpd_ascii_data(uint8_t *evpd_body)
{
return evpd_body + 2;
}
static inline uint8_t *evpd_ascii_post_data(uint8_t *evpd_body)
{
return evpd_body + 2 + evpd_ascii_len(evpd_body);
}
static inline unsigned evpd_ascii_post_data_len(uint8_t *evpd_body, unsigned full_data_len)
{
return full_data_len - EVPD_MIN_LEN - 2 - evpd_ascii_len(evpd_body);
}
static inline bool evpd_is_valid(uint8_t *data, unsigned data_len)
{
if (data_len < EVPD_MIN_LEN)
return false;
if (evpd_page_len(data) > data_len)
return false;
return true;
}
#endif
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