// Copyright 2017 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef ZIRCON_SYSTEM_DEV_ETHERNET_RNDIS_RNDISHOST_H_
#define ZIRCON_SYSTEM_DEV_ETHERNET_RNDIS_RNDISHOST_H_

#include <stdint.h>
#include <zircon/compiler.h>

// clang-format off

// USB subclass and protocol for binding
#define RNDIS_SUBCLASS                  0x01
#define RNDIS_PROTOCOL                  0x03

#define RNDIS_MAJOR_VERSION             0x00000001
#define RNDIS_MINOR_VERSION             0x00000000
#define RNDIS_MAX_XFER_SIZE             0x00004000

// Messages
#define RNDIS_PACKET_MSG                0x00000001
#define RNDIS_INITIALIZE_MSG            0x00000002
#define RNDIS_QUERY_MSG                 0x00000004
#define RNDIS_SET_MSG                   0x00000005
#define RNDIS_INITIALIZE_CMPLT          0x80000002
#define RNDIS_QUERY_CMPLT               0x80000004
#define RNDIS_SET_CMPLT                 0x80000005

// Statuses
#define RNDIS_STATUS_SUCCESS            0x00000000
#define RNDIS_STATUS_FAILURE            0xC0000001
#define RNDIS_STATUS_INVALID_DATA       0xC0010015
#define RNDIS_STATUS_NOT_SUPPORTED      0xC00000BB
#define RNDIS_STATUS_MEDIA_CONNECT      0x4001000B
#define RNDIS_STATUS_MEDIA_DISCONNECT   0x4001000C

// OIDs
#define OID_802_3_PERMANENT_ADDRESS     0x01010101
#define OID_GEN_MAXIMUM_FRAME_SIZE      0x00010106
#define OID_GEN_CURRENT_PACKET_FILTER   0x0001010e
#define OID_GEN_PHYSICAL_MEDIUM         0x00010202

// Filter options
#define RNDIS_PACKET_TYPE_DIRECTED        0x00000001
#define RNDIS_PACKET_TYPE_MULTICAST       0x00000002
#define RNDIS_PACKET_TYPE_ALL_MULTICAST   0x00000004
#define RNDIS_PACKET_TYPE_BROADCAST       0x00000008
#define RNDIS_PACKET_TYPE_SOURCE_ROUTING  0x00000010
#define RNDIS_PACKET_TYPE_PROMISCUOUS     0x00000020
#define RNDIS_PACKET_TYPE_SMT             0x00000040
#define RNDIS_PACKET_TYPE_ALL_LOCAL       0x00000080
#define RNDIS_PACKET_TYPE_GROUP           0x00001000
#define RNDIS_PACKET_TYPE_ALL_FUNCTIONAL  0x00002000
#define RNDIS_PACKET_TYPE_FUNCTIONAL      0x00004000
#define RNDIS_PACKET_TYPE_MAC_FRAME       0x00008000

#define RNDIS_BUFFER_SIZE 1024
#define RNDIS_QUERY_BUFFER_OFFSET 20
#define RNDIS_CONTROL_TIMEOUT ZX_SEC(5)

typedef struct {
    uint32_t msg_type;
    uint32_t msg_length;
    uint32_t request_id;
} __PACKED rndis_header;

typedef struct {
    uint32_t msg_type;
    uint32_t msg_length;
    uint32_t request_id;
    uint32_t status;
} __PACKED rndis_header_complete;

typedef struct {
    uint32_t msg_type;
    uint32_t msg_length;
    uint32_t request_id;
    uint32_t major_version;
    uint32_t minor_version;
    uint32_t max_xfer_size;
} __PACKED rndis_init;

typedef struct {
    uint32_t msg_type;
    uint32_t msg_length;
    uint32_t request_id;
    uint32_t status;
    uint32_t major_version;
    uint32_t minor_version;
    uint32_t device_flags;
    uint32_t medium;
    uint32_t max_packers_per_xfer;
    uint32_t max_xfer_size;
    uint32_t packet_alignment;
    uint32_t reserved0;
    uint32_t reserved1;
} __PACKED rndis_init_complete;

typedef struct {
    uint32_t msg_type;
    uint32_t msg_length;
    uint32_t request_id;
    uint32_t oid;
    uint32_t info_buffer_length;
    uint32_t info_buffer_offset;
    uint32_t reserved;
} __PACKED rndis_query;

typedef struct {
    uint32_t msg_type;
    uint32_t msg_length;
    uint32_t request_id;
    uint32_t status;
    uint32_t info_buffer_length;
    uint32_t info_buffer_offset;
} __PACKED rndis_query_complete;

typedef struct {
    uint32_t msg_type;
    uint32_t msg_length;
    uint32_t request_id;
    uint32_t oid;
    uint32_t info_buffer_length;
    uint32_t info_buffer_offset;
    uint32_t reserved;
} __PACKED rndis_set;

typedef struct {
    uint32_t msg_type;
    uint32_t msg_length;
    uint32_t request_id;
    uint32_t status;
    // TODO: Figure out why these fields aren't send in the reply. Maybe the
    // Pixel I'm testing with implements the spec badly?
    //uint32_t info_buffer_length;
    //uint32_t info_buffer_offset;
} __PACKED rndis_set_complete;

typedef struct {
    uint32_t msg_type;
    uint32_t msg_length;
    uint32_t data_offset;
    uint32_t data_length;
    uint32_t oob_data_offset;
    uint32_t oob_data_length;
    uint32_t num_oob_elements;
    uint32_t per_packet_info_offset;
    uint32_t per_packet_info_length;
    uint32_t reserved0;
    uint32_t reserved1;
} __PACKED rndis_packet_header;

#endif  // ZIRCON_SYSTEM_DEV_ETHERNET_RNDIS_RNDISHOST_H_