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32 * An implementation of HyperV key value pair (KVP) functionality for FreeBSD
37 * Maximum value size - used for both key names and value data, and includes
38 * any applicable NULL terminators.
40 * Note: This limit is somewhat arbitrary, but falls easily within what is
41 * supported for all native guests (back to Win 2000) and what is reasonable
42 * for the IC KVP exchange functionality. Note that Windows Me/98/95 are
43 * limited to 255 character key names.
45 * MSDN recommends not storing data values larger than 2048 bytes in the
48 * Note: This value is used in defining the KVP exchange message - this value
49 * cannot be modified without affecting the message size and compatibility.
53 * bytes, including any null terminators
55 #define HV_KVP_EXCHANGE_MAX_VALUE_SIZE (2048)
59 * Maximum key size - the registry limit for the length of an entry name
60 * is 256 characters, including the null terminator
62 #define HV_KVP_EXCHANGE_MAX_KEY_SIZE (512)
66 * In FreeBSD, we implement the KVP functionality in two components:
67 * 1) The kernel component which is packaged as part of the hv_utils driver
68 * is responsible for communicating with the host and responsible for
69 * implementing the host/guest protocol. 2) A user level daemon that is
70 * responsible for data gathering.
72 * Host/Guest Protocol: The host iterates over an index and expects the guest
73 * to assign a key name to the index and also return the value corresponding to
74 * the key. The host will have atmost one KVP transaction outstanding at any
75 * given point in time. The host side iteration stops when the guest returns
76 * an error. Microsoft has specified the following mapping of key names to
77 * host specified index:
80 * 0 FullyQualifiedDomainName
81 * 1 IntegrationServicesVersion
82 * 2 NetworkAddressIPv4
83 * 3 NetworkAddressIPv6
89 * 9 ProcessorArchitecture
91 * The Windows host expects the Key Name and Key Value to be encoded in utf16.
93 * Guest Kernel/KVP Daemon Protocol: As noted earlier, we implement all of the
94 * data gathering functionality in a user mode daemon. The user level daemon
95 * is also responsible for binding the key name to the index as well. The
96 * kernel and user-level daemon communicate using a connector channel.
98 * The user mode component first registers with the
99 * the kernel component. Subsequently, the kernel component requests, data
100 * for the specified keys. In response to this message the user mode component
101 * fills in the value corresponding to the specified key. We overload the
102 * sequence field in the cn_msg header to define our KVP message types.
105 * The kernel component simply acts as a conduit for communication between the
106 * Windows host and the user-level daemon. The kernel component passes up the
107 * index received from the Host to the user-level daemon. If the index is
108 * valid (supported), the corresponding key as well as its
109 * value (both are strings) is returned. If the index is invalid
110 * (not supported), a NULL key string is returned.
115 * Registry value types.
123 * Daemon code supporting IP injection.
125 #define HV_KVP_OP_REGISTER 4
128 enum hv_kvp_exchg_op {
133 HV_KVP_OP_GET_IP_INFO,
134 HV_KVP_OP_SET_IP_INFO,
135 HV_KVP_OP_COUNT /* Number of operations, must be last. */
138 enum hv_kvp_exchg_pool {
139 HV_KVP_POOL_EXTERNAL = 0,
142 HV_KVP_POOL_AUTO_EXTERNAL,
143 HV_KVP_POOL_AUTO_INTERNAL,
144 HV_KVP_POOL_COUNT /* Number of pools, must be last. */
147 #define ADDR_FAMILY_NONE 0x00
148 #define ADDR_FAMILY_IPV4 0x01
149 #define ADDR_FAMILY_IPV6 0x02
151 #define MAX_ADAPTER_ID_SIZE 128
152 #define MAX_IP_ADDR_SIZE 1024
153 #define MAX_GATEWAY_SIZE 512
156 struct hv_kvp_ipaddr_value {
157 uint16_t adapter_id[MAX_ADAPTER_ID_SIZE];
159 uint8_t dhcp_enabled;
160 uint16_t ip_addr[MAX_IP_ADDR_SIZE];
161 uint16_t sub_net[MAX_IP_ADDR_SIZE];
162 uint16_t gate_way[MAX_GATEWAY_SIZE];
163 uint16_t dns_addr[MAX_IP_ADDR_SIZE];
164 }__attribute__((packed));
170 } __attribute__((packed));
172 struct hv_kvp_exchg_msg_value {
176 uint8_t key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
178 uint8_t value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
182 } __attribute__((packed));
184 struct hv_kvp_msg_enumerate {
186 struct hv_kvp_exchg_msg_value data;
187 } __attribute__((packed));
189 struct hv_kvp_msg_get {
190 struct hv_kvp_exchg_msg_value data;
191 } __attribute__((packed));
193 struct hv_kvp_msg_set {
194 struct hv_kvp_exchg_msg_value data;
195 } __attribute__((packed));
197 struct hv_kvp_msg_delete {
199 uint8_t key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
200 } __attribute__((packed));
202 struct hv_kvp_register {
203 uint8_t version[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
204 } __attribute__((packed));
208 struct hv_kvp_hdr kvp_hdr;
212 struct hv_kvp_msg_get kvp_get;
213 struct hv_kvp_msg_set kvp_set;
214 struct hv_kvp_msg_delete kvp_delete;
215 struct hv_kvp_msg_enumerate kvp_enum_data;
216 struct hv_kvp_ipaddr_value kvp_ip_val;
217 struct hv_kvp_register kvp_register;
219 } __attribute__((packed));
221 struct hv_kvp_ip_msg {
224 struct hv_kvp_ipaddr_value kvp_ip_val;
225 } __attribute__((packed));