242 lines
7.4 KiB
C
242 lines
7.4 KiB
C
/*-
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* Copyright (c) 2014,2016 Microsoft Corp.
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* All rights reserved.
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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 unmodified, this list of conditions, and the following
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* 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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _KVP_H
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#define _KVP_H
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/*
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* An implementation of HyperV key value pair (KVP) functionality for FreeBSD
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*
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*/
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/*
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* Maximum value size - used for both key names and value data, and includes
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* any applicable NULL terminators.
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*
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* Note: This limit is somewhat arbitrary, but falls easily within what is
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* supported for all native guests (back to Win 2000) and what is reasonable
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* for the IC KVP exchange functionality. Note that Windows Me/98/95 are
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* limited to 255 character key names.
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*
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* MSDN recommends not storing data values larger than 2048 bytes in the
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* registry.
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*
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* Note: This value is used in defining the KVP exchange message - this value
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* cannot be modified without affecting the message size and compatibility.
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*/
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/*
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* bytes, including any null terminators
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*/
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#define HV_KVP_EXCHANGE_MAX_VALUE_SIZE (2048)
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/*
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* Maximum key size - the registry limit for the length of an entry name
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* is 256 characters, including the null terminator
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*/
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#define HV_KVP_EXCHANGE_MAX_KEY_SIZE (512)
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/*
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* In FreeBSD, we implement the KVP functionality in two components:
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* 1) The kernel component which is packaged as part of the hv_utils driver
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* is responsible for communicating with the host and responsible for
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* implementing the host/guest protocol. 2) A user level daemon that is
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* responsible for data gathering.
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*
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* Host/Guest Protocol: The host iterates over an index and expects the guest
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* to assign a key name to the index and also return the value corresponding to
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* the key. The host will have atmost one KVP transaction outstanding at any
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* given point in time. The host side iteration stops when the guest returns
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* an error. Microsoft has specified the following mapping of key names to
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* host specified index:
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*
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* Index Key Name
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* 0 FullyQualifiedDomainName
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* 1 IntegrationServicesVersion
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* 2 NetworkAddressIPv4
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* 3 NetworkAddressIPv6
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* 4 OSBuildNumber
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* 5 OSName
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* 6 OSMajorVersion
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* 7 OSMinorVersion
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* 8 OSVersion
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* 9 ProcessorArchitecture
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*
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* The Windows host expects the Key Name and Key Value to be encoded in utf16.
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*
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* Guest Kernel/KVP Daemon Protocol: As noted earlier, we implement all of the
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* data gathering functionality in a user mode daemon. The user level daemon
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* is also responsible for binding the key name to the index as well. The
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* kernel and user-level daemon communicate using a connector channel.
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*
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* The user mode component first registers with the
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* the kernel component. Subsequently, the kernel component requests, data
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* for the specified keys. In response to this message the user mode component
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* fills in the value corresponding to the specified key. We overload the
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* sequence field in the cn_msg header to define our KVP message types.
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*
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*
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* The kernel component simply acts as a conduit for communication between the
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* Windows host and the user-level daemon. The kernel component passes up the
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* index received from the Host to the user-level daemon. If the index is
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* valid (supported), the corresponding key as well as its
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* value (both are strings) is returned. If the index is invalid
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* (not supported), a NULL key string is returned.
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*/
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/*
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* Registry value types.
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*/
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#define HV_REG_SZ 1
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#define HV_REG_U32 4
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#define HV_REG_U64 8
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/*
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* Daemon code supporting IP injection.
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*/
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#define HV_KVP_OP_REGISTER 4
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enum hv_kvp_exchg_op {
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HV_KVP_OP_GET = 0,
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HV_KVP_OP_SET,
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HV_KVP_OP_DELETE,
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HV_KVP_OP_ENUMERATE,
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HV_KVP_OP_GET_IP_INFO,
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HV_KVP_OP_SET_IP_INFO,
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HV_KVP_OP_COUNT /* Number of operations, must be last. */
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};
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enum hv_kvp_exchg_pool {
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HV_KVP_POOL_EXTERNAL = 0,
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HV_KVP_POOL_GUEST,
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HV_KVP_POOL_AUTO,
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HV_KVP_POOL_AUTO_EXTERNAL,
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HV_KVP_POOL_AUTO_INTERNAL,
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HV_KVP_POOL_COUNT /* Number of pools, must be last. */
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};
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/*
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* Some Hyper-V status codes.
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*/
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#define HV_KVP_S_OK 0x00000000
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#define HV_KVP_E_FAIL 0x80004005
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#define HV_KVP_S_CONT 0x80070103
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#define HV_ERROR_NOT_SUPPORTED 0x80070032
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#define HV_ERROR_MACHINE_LOCKED 0x800704F7
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#define HV_ERROR_DEVICE_NOT_CONNECTED 0x8007048F
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#define HV_INVALIDARG 0x80070057
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#define HV_KVP_GUID_NOTFOUND 0x80041002
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#define ADDR_FAMILY_NONE 0x00
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#define ADDR_FAMILY_IPV4 0x01
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#define ADDR_FAMILY_IPV6 0x02
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#define MAX_ADAPTER_ID_SIZE 128
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#define MAX_IP_ADDR_SIZE 1024
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#define MAX_GATEWAY_SIZE 512
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struct hv_kvp_ipaddr_value {
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uint16_t adapter_id[MAX_ADAPTER_ID_SIZE];
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uint8_t addr_family;
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uint8_t dhcp_enabled;
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uint16_t ip_addr[MAX_IP_ADDR_SIZE];
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uint16_t sub_net[MAX_IP_ADDR_SIZE];
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uint16_t gate_way[MAX_GATEWAY_SIZE];
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uint16_t dns_addr[MAX_IP_ADDR_SIZE];
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}__attribute__((packed));
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struct hv_kvp_hdr {
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uint8_t operation;
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uint8_t pool;
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uint16_t pad;
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} __attribute__((packed));
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struct hv_kvp_exchg_msg_value {
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uint32_t value_type;
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uint32_t key_size;
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uint32_t value_size;
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uint8_t key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
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union {
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uint8_t value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
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uint32_t value_u32;
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uint64_t value_u64;
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} msg_value;
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} __attribute__((packed));
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struct hv_kvp_msg_enumerate {
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uint32_t index;
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struct hv_kvp_exchg_msg_value data;
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} __attribute__((packed));
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struct hv_kvp_msg_get {
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struct hv_kvp_exchg_msg_value data;
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} __attribute__((packed));
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struct hv_kvp_msg_set {
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struct hv_kvp_exchg_msg_value data;
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} __attribute__((packed));
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struct hv_kvp_msg_delete {
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uint32_t key_size;
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uint8_t key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
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} __attribute__((packed));
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struct hv_kvp_register {
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uint8_t version[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
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} __attribute__((packed));
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struct hv_kvp_msg {
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union {
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struct hv_kvp_hdr kvp_hdr;
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uint32_t error;
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} hdr;
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union {
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struct hv_kvp_msg_get kvp_get;
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struct hv_kvp_msg_set kvp_set;
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struct hv_kvp_msg_delete kvp_delete;
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struct hv_kvp_msg_enumerate kvp_enum_data;
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struct hv_kvp_ipaddr_value kvp_ip_val;
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struct hv_kvp_register kvp_register;
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} body;
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} __attribute__((packed));
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struct hv_kvp_ip_msg {
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uint8_t operation;
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uint8_t pool;
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struct hv_kvp_ipaddr_value kvp_ip_val;
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} __attribute__((packed));
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#endif /* _KVP_H */
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