/usr/include/linux/uhid.h is in linux-libc-dev 4.15.0-20.21.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 | /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
#ifndef __UHID_H_
#define __UHID_H_
/*
* User-space I/O driver support for HID subsystem
* Copyright (c) 2012 David Herrmann
*/
/*
* 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 2 of the License, or (at your option)
* any later version.
*/
/*
* Public header for user-space communication. We try to keep every structure
* aligned but to be safe we also use __attribute__((__packed__)). Therefore,
* the communication should be ABI compatible even between architectures.
*/
#include <linux/input.h>
#include <linux/types.h>
#include <linux/hid.h>
enum uhid_event_type {
__UHID_LEGACY_CREATE,
UHID_DESTROY,
UHID_START,
UHID_STOP,
UHID_OPEN,
UHID_CLOSE,
UHID_OUTPUT,
__UHID_LEGACY_OUTPUT_EV,
__UHID_LEGACY_INPUT,
UHID_GET_REPORT,
UHID_GET_REPORT_REPLY,
UHID_CREATE2,
UHID_INPUT2,
UHID_SET_REPORT,
UHID_SET_REPORT_REPLY,
};
struct uhid_create2_req {
__u8 name[128];
__u8 phys[64];
__u8 uniq[64];
__u16 rd_size;
__u16 bus;
__u32 vendor;
__u32 product;
__u32 version;
__u32 country;
__u8 rd_data[HID_MAX_DESCRIPTOR_SIZE];
} __attribute__((__packed__));
enum uhid_dev_flag {
UHID_DEV_NUMBERED_FEATURE_REPORTS = (1ULL << 0),
UHID_DEV_NUMBERED_OUTPUT_REPORTS = (1ULL << 1),
UHID_DEV_NUMBERED_INPUT_REPORTS = (1ULL << 2),
};
struct uhid_start_req {
__u64 dev_flags;
};
#define UHID_DATA_MAX 4096
enum uhid_report_type {
UHID_FEATURE_REPORT,
UHID_OUTPUT_REPORT,
UHID_INPUT_REPORT,
};
struct uhid_input2_req {
__u16 size;
__u8 data[UHID_DATA_MAX];
} __attribute__((__packed__));
struct uhid_output_req {
__u8 data[UHID_DATA_MAX];
__u16 size;
__u8 rtype;
} __attribute__((__packed__));
struct uhid_get_report_req {
__u32 id;
__u8 rnum;
__u8 rtype;
} __attribute__((__packed__));
struct uhid_get_report_reply_req {
__u32 id;
__u16 err;
__u16 size;
__u8 data[UHID_DATA_MAX];
} __attribute__((__packed__));
struct uhid_set_report_req {
__u32 id;
__u8 rnum;
__u8 rtype;
__u16 size;
__u8 data[UHID_DATA_MAX];
} __attribute__((__packed__));
struct uhid_set_report_reply_req {
__u32 id;
__u16 err;
} __attribute__((__packed__));
/*
* Compat Layer
* All these commands and requests are obsolete. You should avoid using them in
* new code. We support them for backwards-compatibility, but you might not get
* access to new feature in case you use them.
*/
enum uhid_legacy_event_type {
UHID_CREATE = __UHID_LEGACY_CREATE,
UHID_OUTPUT_EV = __UHID_LEGACY_OUTPUT_EV,
UHID_INPUT = __UHID_LEGACY_INPUT,
UHID_FEATURE = UHID_GET_REPORT,
UHID_FEATURE_ANSWER = UHID_GET_REPORT_REPLY,
};
/* Obsolete! Use UHID_CREATE2. */
struct uhid_create_req {
__u8 name[128];
__u8 phys[64];
__u8 uniq[64];
__u8 *rd_data;
__u16 rd_size;
__u16 bus;
__u32 vendor;
__u32 product;
__u32 version;
__u32 country;
} __attribute__((__packed__));
/* Obsolete! Use UHID_INPUT2. */
struct uhid_input_req {
__u8 data[UHID_DATA_MAX];
__u16 size;
} __attribute__((__packed__));
/* Obsolete! Kernel uses UHID_OUTPUT exclusively now. */
struct uhid_output_ev_req {
__u16 type;
__u16 code;
__s32 value;
} __attribute__((__packed__));
/* Obsolete! Kernel uses ABI compatible UHID_GET_REPORT. */
struct uhid_feature_req {
__u32 id;
__u8 rnum;
__u8 rtype;
} __attribute__((__packed__));
/* Obsolete! Use ABI compatible UHID_GET_REPORT_REPLY. */
struct uhid_feature_answer_req {
__u32 id;
__u16 err;
__u16 size;
__u8 data[UHID_DATA_MAX];
} __attribute__((__packed__));
/*
* UHID Events
* All UHID events from and to the kernel are encoded as "struct uhid_event".
* The "type" field contains a UHID_* type identifier. All payload depends on
* that type and can be accessed via ev->u.XYZ accordingly.
* If user-space writes short events, they're extended with 0s by the kernel. If
* the kernel writes short events, user-space shall extend them with 0s.
*/
struct uhid_event {
__u32 type;
union {
struct uhid_create_req create;
struct uhid_input_req input;
struct uhid_output_req output;
struct uhid_output_ev_req output_ev;
struct uhid_feature_req feature;
struct uhid_get_report_req get_report;
struct uhid_feature_answer_req feature_answer;
struct uhid_get_report_reply_req get_report_reply;
struct uhid_create2_req create2;
struct uhid_input2_req input2;
struct uhid_set_report_req set_report;
struct uhid_set_report_reply_req set_report_reply;
struct uhid_start_req start;
} u;
} __attribute__((__packed__));
#endif /* __UHID_H_ */
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