1 /* 2 * Copyright (c) 2013-2022 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29 #ifndef _NET_NECP_H_ 30 #define _NET_NECP_H_ 31 32 #include <net/net_kev.h> 33 #ifdef PRIVATE 34 35 #include <netinet/in.h> 36 #include <netinet/in_stat.h> 37 #include <sys/socket.h> 38 #include <net/if.h> 39 40 #if SKYWALK 41 #include <skywalk/os_nexus_private.h> 42 #else /* !SKYWALK */ 43 typedef uint16_t nexus_port_t; 44 #endif /* !SKYWALK */ 45 46 /* 47 * Name registered by the NECP 48 */ 49 #define NECP_CONTROL_NAME "com.apple.net.necp_control" 50 51 #define NECP_TLV_LENGTH_UINT32 1 52 53 struct necp_packet_header { 54 u_int8_t packet_type; 55 u_int8_t flags; 56 u_int32_t message_id; 57 }; 58 59 typedef struct { 60 uid_t uid; 61 uuid_t effective_uuid; 62 uid_t persona_id; 63 } necp_application_id_t; 64 65 /* 66 * Control message commands 67 */ 68 #define NECP_PACKET_TYPE_POLICY_ADD 1 69 #define NECP_PACKET_TYPE_POLICY_GET 2 70 #define NECP_PACKET_TYPE_POLICY_DELETE 3 71 #define NECP_PACKET_TYPE_POLICY_APPLY_ALL 4 72 #define NECP_PACKET_TYPE_POLICY_LIST_ALL 5 73 #define NECP_PACKET_TYPE_POLICY_DELETE_ALL 6 74 #define NECP_PACKET_TYPE_SET_SESSION_PRIORITY 7 75 #define NECP_PACKET_TYPE_LOCK_SESSION_TO_PROC 8 76 #define NECP_PACKET_TYPE_REGISTER_SERVICE 9 77 #define NECP_PACKET_TYPE_UNREGISTER_SERVICE 10 78 #define NECP_PACKET_TYPE_POLICY_DUMP_ALL 11 79 80 /* 81 * Session actions 82 */ 83 #define NECP_SESSION_ACTION_POLICY_ADD 1 // In: Policy TLVs Out: necp_policy_id 84 #define NECP_SESSION_ACTION_POLICY_GET 2 // In: necp_policy_id Out: Policy TLVs 85 #define NECP_SESSION_ACTION_POLICY_DELETE 3 // In: necp_policy_id Out: None 86 #define NECP_SESSION_ACTION_POLICY_APPLY_ALL 4 // In: None Out: None 87 #define NECP_SESSION_ACTION_POLICY_LIST_ALL 5 // In: None Out: TLVs of IDs 88 #define NECP_SESSION_ACTION_POLICY_DELETE_ALL 6 // In: None Out: None 89 #define NECP_SESSION_ACTION_SET_SESSION_PRIORITY 7 // In: necp_session_priority Out: None 90 #define NECP_SESSION_ACTION_LOCK_SESSION_TO_PROC 8 // In: None Out: None 91 #define NECP_SESSION_ACTION_REGISTER_SERVICE 9 // In: uuid_t Out: None 92 #define NECP_SESSION_ACTION_UNREGISTER_SERVICE 10 // In: uuid_t Out: None 93 #define NECP_SESSION_ACTION_POLICY_DUMP_ALL 11 // In: None Out: uint32_t bytes length, then Policy TLVs 94 #define NECP_SESSION_ACTION_ADD_DOMAIN_FILTER 12 // In: struct net_bloom_filter Out: uint32_t, ID 95 #define NECP_SESSION_ACTION_REMOVE_DOMAIN_FILTER 13 // In: uint32_t, ID Out: None 96 #define NECP_SESSION_ACTION_REMOVE_ALL_DOMAIN_FILTERS 14 // In: None Out: None 97 98 /* 99 * Control message flags 100 */ 101 #define NECP_PACKET_FLAGS_RESPONSE 0x01 // Used for acks, errors, and query responses 102 103 /* 104 * Control message TLV types 105 */ 106 #define NECP_TLV_NIL 0 107 #define NECP_TLV_ERROR 1 // u_int32_t 108 #define NECP_TLV_POLICY_ORDER 2 // u_int32_t 109 #define NECP_TLV_POLICY_CONDITION 3 110 #define NECP_TLV_POLICY_RESULT 4 111 #define NECP_TLV_POLICY_ID 5 // u_int32_t 112 #define NECP_TLV_SESSION_PRIORITY 6 // u_int32_t 113 #define NECP_TLV_ATTRIBUTE_DOMAIN 7 // char[] 114 #define NECP_TLV_ATTRIBUTE_ACCOUNT 8 // char[] 115 #define NECP_TLV_SERVICE_UUID 9 // uuid_t 116 #define NECP_TLV_ROUTE_RULE 10 117 #define NECP_TLV_ATTRIBUTE_DOMAIN_OWNER 11 // char[] 118 #define NECP_TLV_ATTRIBUTE_TRACKER_DOMAIN 12 // char[] 119 #define NECP_TLV_ATTRIBUTE_DOMAIN_CONTEXT 13 // char[] 120 121 /* 122 * Control message TLV sent only by the kernel to userspace 123 */ 124 #define NECP_TLV_POLICY_OWNER 100 // char [] 125 #define NECP_TLV_POLICY_DUMP 101 126 #define NECP_TLV_POLICY_RESULT_STRING 102 // char [] 127 #define NECP_TLV_POLICY_SESSION_ORDER 103 // u_int32_t 128 129 /* 130 * Condition flags 131 */ 132 #define NECP_POLICY_CONDITION_FLAGS_NEGATIVE 0x01 // Negative 133 #define NECP_POLICY_CONDITION_FLAGS_EXACT 0x02 // For conditions that would otherwise have more inclusive matching, require an exact match 134 135 /* 136 * Conditions 137 * Used for setting policies as well as passing parameters to necp_match_policy. 138 */ 139 #define NECP_POLICY_CONDITION_DEFAULT 0 // N/A, not valid with any other conditions 140 // Socket/Application conditions 141 #define NECP_POLICY_CONDITION_APPLICATION 1 // uuid_t, uses effective UUID when possible 142 #define NECP_POLICY_CONDITION_REAL_APPLICATION 2 // uuid_t, never uses effective UUID. Only valid with NECP_POLICY_CONDITION_APPLICATION 143 #define NECP_POLICY_CONDITION_DOMAIN 3 // String, such as apple.com 144 #define NECP_POLICY_CONDITION_ACCOUNT 4 // String 145 #define NECP_POLICY_CONDITION_ENTITLEMENT 5 // String 146 #define NECP_POLICY_CONDITION_PID 6 // pid_t 147 #define NECP_POLICY_CONDITION_UID 7 // uid_t 148 #define NECP_POLICY_CONDITION_ALL_INTERFACES 8 // N/A 149 #define NECP_POLICY_CONDITION_BOUND_INTERFACE 9 // String 150 #define NECP_POLICY_CONDITION_TRAFFIC_CLASS 10 // necp_policy_condition_tc_range 151 // Socket/IP conditions 152 #define NECP_POLICY_CONDITION_IP_PROTOCOL 11 // u_int16_t 153 #define NECP_POLICY_CONDITION_LOCAL_ADDR 12 // necp_policy_condition_addr 154 #define NECP_POLICY_CONDITION_REMOTE_ADDR 13 // necp_policy_condition_addr 155 #define NECP_POLICY_CONDITION_LOCAL_ADDR_RANGE 14 // necp_policy_condition_addr_range 156 #define NECP_POLICY_CONDITION_REMOTE_ADDR_RANGE 15 // necp_policy_condition_addr_range 157 #define NECP_POLICY_CONDITION_AGENT_TYPE 16 // struct necp_policy_condition_agent_type 158 #define NECP_POLICY_CONDITION_HAS_CLIENT 17 // N/A 159 #define NECP_POLICY_CONDITION_LOCAL_NETWORKS 18 // Matches all local networks 160 // Socket-only conditions 161 #define NECP_POLICY_CONDITION_FLOW_IP_PROTOCOL 19 // u_int16_t 162 #define NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR 20 // necp_policy_condition_addr 163 #define NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR 21 // necp_policy_condition_addr 164 #define NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR_RANGE 22 // necp_policy_condition_addr_range 165 #define NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR_RANGE 23 // necp_policy_condition_addr_range 166 #define NECP_POLICY_CONDITION_FLOW_IS_LOOPBACK 31 // N/A 167 // Socket/Application conditions, continued 168 #define NECP_POLICY_CONDITION_CLIENT_FLAGS 24 // u_int32_t, values from NECP_CLIENT_PARAMETER_FLAG_* 169 #define NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR_EMPTY 25 // N/A 170 #define NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR_EMPTY 26 // N/A 171 #define NECP_POLICY_CONDITION_PLATFORM_BINARY 27 // N/A 172 #define NECP_POLICY_CONDITION_SDK_VERSION 28 // struct necp_policy_condition_sdk_version 173 #define NECP_POLICY_CONDITION_SIGNING_IDENTIFIER 29 // String 174 #define NECP_POLICY_CONDITION_PACKET_FILTER_TAGS 30 // u_int16_t 175 #define NECP_POLICY_CONDITION_DELEGATE_IS_PLATFORM_BINARY 32 // N/A 176 #define NECP_POLICY_CONDITION_DOMAIN_OWNER 33 // String, owner of domain (for example, "Google Inc") 177 #define NECP_POLICY_CONDITION_DOMAIN_CONTEXT 34 // String, eTLD+1 leading to networking activities to the domain 178 #define NECP_POLICY_CONDITION_TRACKER_DOMAIN 35 // String, tracker domain 179 #define NECP_POLICY_CONDITION_ATTRIBUTED_BUNDLE_IDENTIFIER 36 // String, app to which traffic is attributed to 180 #define NECP_POLICY_CONDITION_SCHEME_PORT 37 // u_int16_t, the port associated with the scheme for a connection 181 #define NECP_POLICY_CONDITION_DOMAIN_FILTER 38 // struct net_bloom_filter 182 #define NECP_POLICY_CONDITION_SYSTEM_SIGNED_RESULT 39 // N/A 183 #define NECP_POLICY_CONDITION_REAL_UID 40 // uid_t 184 #define NECP_POLICY_CONDITION_APPLICATION_ID 41 // necp_application_id_t 185 #define NECP_POLICY_CONDITION_URL 42 // String, URL 186 187 /* 188 * Policy Packet tags 189 */ 190 #define NECP_POLICY_CONDITION_PACKET_FILTER_TAG_STACK_DROP 0x01 191 #define NECP_POLICY_CONDITION_PACKET_FILTER_TAG_MAX NECP_POLICY_CONDITION_PACKET_FILTER_TAG_STACK_DROP 192 193 /* 194 * Results 195 */ 196 #define NECP_POLICY_RESULT_PASS 1 // N/A 197 #define NECP_POLICY_RESULT_SKIP 2 // u_int32_t, policy order to skip to. 0 to skip all session policies. 198 #define NECP_POLICY_RESULT_DROP 3 // N/A 199 #define NECP_POLICY_RESULT_SOCKET_DIVERT 4 // u_int32_t, flow divert control unit 200 #define NECP_POLICY_RESULT_SOCKET_FILTER 5 // u_int32_t, filter control unit 201 #define NECP_POLICY_RESULT_IP_TUNNEL 6 // String, interface name 202 #define NECP_POLICY_RESULT_IP_FILTER 7 // ? 203 #define NECP_POLICY_RESULT_TRIGGER 8 // Deprecated 204 #define NECP_POLICY_RESULT_TRIGGER_IF_NEEDED 9 // Deprecated 205 #define NECP_POLICY_RESULT_TRIGGER_SCOPED 10 // Deprecated 206 #define NECP_POLICY_RESULT_NO_TRIGGER_SCOPED 11 // Deprecated 207 #define NECP_POLICY_RESULT_SOCKET_SCOPED 12 // String, interface name 208 #define NECP_POLICY_RESULT_ROUTE_RULES 13 // N/A, must have route rules defined 209 #define NECP_POLICY_RESULT_USE_NETAGENT 14 // netagent uuid_t 210 #define NECP_POLICY_RESULT_NETAGENT_SCOPED 15 // netagent uuid_t 211 #define NECP_POLICY_RESULT_SCOPED_DIRECT 16 // N/A, scopes to primary physical interface 212 #define NECP_POLICY_RESULT_ALLOW_UNENTITLED 17 // N/A 213 #define NECP_POLICY_RESULT_REMOVE_NETAGENT 18 // netagent uuid_t 214 215 #define NECP_POLICY_RESULT_MAX NECP_POLICY_RESULT_REMOVE_NETAGENT 216 217 /* 218 * PASS Result Flags 219 */ 220 #define NECP_POLICY_PASS_NO_SKIP_IPSEC 0x01 221 #define NECP_POLICY_PASS_PF_TAG 0x02 222 223 /* 224 * DROP Result Flags 225 */ 226 #define NECP_POLICY_DROP_FLAG_LOCAL_NETWORK 0x01 227 228 /* 229 * Route Rules 230 * Detailed parameters for NECP_POLICY_RESULT_ROUTE_RULES. 231 */ 232 #define NECP_ROUTE_RULE_NONE 0 // N/A 233 #define NECP_ROUTE_RULE_DENY_INTERFACE 1 // String, or empty to match all 234 #define NECP_ROUTE_RULE_ALLOW_INTERFACE 2 // String, or empty to match all 235 #define NECP_ROUTE_RULE_QOS_MARKING 3 // String, or empty to match all 236 #define NECP_ROUTE_RULE_DENY_LQM_ABORT 4 // String, or empty to match all 237 #define NECP_ROUTE_RULE_USE_NETAGENT 5 // UUID, followed by string or empty 238 #define NECP_ROUTE_RULE_REMOVE_NETAGENT 6 // UUID, followed by string or empty 239 #define NECP_ROUTE_RULE_DIVERT_SOCKET 7 // u_int32_t control unit, followed by string or empty 240 #define NECP_ROUTE_RULE_DENY_INTERFACE_WITH_TYPE 8 // u_int32_t effective type, followed by string or empty 241 242 #define NECP_ROUTE_RULE_FLAG_CELLULAR 0x01 243 #define NECP_ROUTE_RULE_FLAG_WIFI 0x02 244 #define NECP_ROUTE_RULE_FLAG_WIRED 0x04 245 #define NECP_ROUTE_RULE_FLAG_EXPENSIVE 0x08 246 #define NECP_ROUTE_RULE_FLAG_CONSTRAINED 0x10 247 #define NECP_ROUTE_RULE_FLAG_COMPANION 0x20 248 249 #define NECP_ROUTE_RULE_FLAG_NETAGENT 0x80 // Last bit, reserved to mark that this applies only when an agent UUID is present 250 251 #define NECP_ROUTE_RULES_SUPPORT_NETAGENT_EXCEPTIONS 1 252 253 /* 254 * Error types 255 */ 256 #define NECP_ERROR_INTERNAL 0 257 #define NECP_ERROR_UNKNOWN_PACKET_TYPE 1 258 #define NECP_ERROR_INVALID_TLV 2 259 #define NECP_ERROR_POLICY_RESULT_INVALID 3 260 #define NECP_ERROR_POLICY_CONDITIONS_INVALID 4 261 #define NECP_ERROR_POLICY_ID_NOT_FOUND 5 262 #define NECP_ERROR_INVALID_PROCESS 6 263 #define NECP_ERROR_ROUTE_RULES_INVALID 7 264 265 // Modifiers 266 #define NECP_MASK_USERSPACE_ONLY 0x80000000 // on filter_control_unit value 267 #define NECP_MASK_PRESERVE_CONNECTIONS 0x20000000 // on filter_control_unit value 268 269 struct necp_policy_condition_tc_range { 270 u_int32_t start_tc; 271 u_int32_t end_tc; 272 } __attribute__((__packed__)); 273 274 struct necp_policy_condition_addr { 275 u_int8_t prefix; 276 union { 277 #if !__has_ptrcheck 278 struct sockaddr sa; 279 #endif 280 struct __sockaddr_header sah; 281 struct sockaddr_in sin; 282 struct sockaddr_in6 sin6; 283 } address __attribute__((__packed__)); 284 } __attribute__((__packed__)); 285 286 struct necp_policy_condition_addr_range { 287 union { 288 #if !__has_ptrcheck 289 struct sockaddr sa; 290 #endif 291 struct __sockaddr_header sah; 292 struct sockaddr_in sin; 293 struct sockaddr_in6 sin6; 294 } start_address __attribute__((__packed__)); 295 union { 296 #if !__has_ptrcheck 297 struct sockaddr sa; 298 #endif 299 struct __sockaddr_header sah; 300 struct sockaddr_in sin; 301 struct sockaddr_in6 sin6; 302 } end_address __attribute__((__packed__)); 303 } __attribute__((__packed__)); 304 305 struct necp_policy_condition_agent_type { 306 char agent_domain[32]; 307 char agent_type[32]; 308 } __attribute__((__packed__)); 309 310 struct necp_policy_condition_sdk_version { 311 uint32_t platform; // e.g., PLATFORM_IOS 312 uint32_t min_version; // Encoded as XXXX.YY.ZZ 313 uint32_t version; // Encoded as XXXX.YY.ZZ 314 } __attribute__((__packed__)); 315 316 #define NECP_SESSION_PRIORITY_UNKNOWN 0 317 #define NECP_SESSION_PRIORITY_CONTROL 1 318 #define NECP_SESSION_PRIORITY_CONTROL_1 2 319 #define NECP_SESSION_PRIORITY_PRIVILEGED_TUNNEL 3 320 #define NECP_SESSION_PRIORITY_HIGH 4 321 #define NECP_SESSION_PRIORITY_HIGH_1 5 322 #define NECP_SESSION_PRIORITY_HIGH_2 6 323 #define NECP_SESSION_PRIORITY_HIGH_3 7 324 #define NECP_SESSION_PRIORITY_HIGH_4 8 325 #define NECP_SESSION_PRIORITY_HIGH_RESTRICTED 9 326 #define NECP_SESSION_PRIORITY_DEFAULT 10 327 #define NECP_SESSION_PRIORITY_LOW 11 328 #define NECP_SESSION_NUM_PRIORITIES NECP_SESSION_PRIORITY_LOW 329 330 typedef u_int32_t necp_policy_id; 331 typedef u_int32_t necp_policy_order; 332 typedef u_int32_t necp_session_priority; 333 334 typedef u_int32_t necp_kernel_policy_result; 335 typedef u_int32_t necp_kernel_policy_filter; 336 337 typedef union { 338 u_int tunnel_interface_index; 339 u_int scoped_interface_index; 340 u_int32_t flow_divert_control_unit; 341 u_int32_t filter_control_unit; 342 u_int32_t pass_flags; 343 u_int32_t drop_flags; 344 } necp_kernel_policy_routing_result_parameter; 345 346 #define NECP_SERVICE_FLAGS_REGISTERED 0x01 347 #define NECP_MAX_NETAGENTS 16 348 349 #define NECP_AGENT_USE_FLAG_SCOPE 0x01 350 #define NECP_AGENT_USE_FLAG_REMOVE 0x02 351 352 #define NECP_TFO_COOKIE_LEN_MAX 16 353 struct necp_aggregate_result { 354 necp_kernel_policy_result routing_result; 355 necp_kernel_policy_routing_result_parameter routing_result_parameter; 356 necp_kernel_policy_filter filter_control_unit; 357 u_int32_t flow_divert_aggregate_unit; 358 necp_kernel_policy_result service_action; 359 uuid_t service_uuid; 360 u_int32_t service_flags; 361 u_int32_t service_data; 362 u_int routed_interface_index; 363 u_int32_t policy_id; 364 u_int32_t skip_policy_id; 365 uuid_t netagents[NECP_MAX_NETAGENTS]; 366 u_int32_t netagent_use_flags[NECP_MAX_NETAGENTS]; 367 struct ipv6_prefix nat64_prefixes[NAT64_MAX_NUM_PREFIXES]; 368 u_int8_t mss_recommended; 369 }; 370 371 /* 372 * Statistics. It would be nice if the definitions in ntstat.h could be used, 373 * but they get entangled with #defines for v4 etc in pfvar.h and it may be better practice 374 * to have separate definitions here. 375 */ 376 struct necp_stat_counts { 377 /* Counters */ 378 u_int64_t necp_stat_rxpackets __attribute__((aligned(8))); 379 u_int64_t necp_stat_rxbytes __attribute__((aligned(8))); 380 u_int64_t necp_stat_txpackets __attribute__((aligned(8))); 381 u_int64_t necp_stat_txbytes __attribute__((aligned(8))); 382 383 u_int32_t necp_stat_rxduplicatebytes; 384 u_int32_t necp_stat_rxoutoforderbytes; 385 u_int32_t necp_stat_txretransmit; 386 387 u_int32_t necp_stat_connectattempts; 388 u_int32_t necp_stat_connectsuccesses; 389 390 u_int32_t necp_stat_min_rtt; 391 u_int32_t necp_stat_avg_rtt; 392 u_int32_t necp_stat_var_rtt; 393 394 #define NECP_STAT_ROUTE_FLAGS 1 395 u_int32_t necp_stat_route_flags; 396 }; 397 398 // Note, some metadata is implicit in the necp client itself: 399 // From the process itself : pid, upid, uuid, proc name. 400 // From the necp client parameters: local and remote addresses, euuid, traffic class, ifindex 401 // 402 // The following may well be supplied via future necp client parameters, 403 // but they are here so they don't get forgotten. 404 struct necp_basic_metadata { 405 u_int32_t rcvbufsize; 406 u_int32_t rcvbufused; 407 }; 408 409 struct necp_connection_probe_status { 410 unsigned int probe_activated : 1; 411 unsigned int write_probe_failed : 1; 412 unsigned int read_probe_failed : 1; 413 unsigned int conn_probe_failed : 1; 414 }; 415 416 struct necp_extra_tcp_metadata { 417 struct necp_connection_probe_status probestatus; 418 419 u_int32_t sndbufsize; 420 u_int32_t sndbufused; 421 u_int32_t txunacked; 422 u_int32_t txwindow; 423 u_int32_t txcwindow; 424 u_int32_t flags; // use SOF_* 425 u_int32_t flags1; // use SOF1_* 426 u_int32_t traffic_mgt_flags; 427 u_int32_t cc_alg_index; 428 u_int32_t state; 429 }; 430 431 struct necp_stats_hdr { 432 u_int32_t necp_stats_type __attribute__((aligned(8))); 433 u_int32_t necp_stats_ver; 434 u_int64_t __necp_stats_reserved; // Pad the field for future use 435 }; 436 437 #define NECP_CLIENT_STATISTICS_TYPE_TCP 1 // Identifies use of necp_tcp_stats 438 #define NECP_CLIENT_STATISTICS_TYPE_UDP 2 // Identifies use of necp_udp_stats 439 #define NECP_CLIENT_STATISTICS_TYPE_QUIC 3 // Identifies use of necp_quic_stats 440 441 #define NECP_CLIENT_STATISTICS_TYPE_TCP_VER_1 1 // Currently supported version for TCP 442 #define NECP_CLIENT_STATISTICS_TYPE_UDP_VER_1 1 // Currently supported version for UDP 443 #define NECP_CLIENT_STATISTICS_TYPE_QUIC_VER_1 1 // Currently supported version for QUIC 444 445 #define NECP_CLIENT_STATISTICS_TYPE_TCP_CURRENT_VER NECP_CLIENT_STATISTICS_TYPE_TCP_VER_1 446 #define NECP_CLIENT_STATISTICS_TYPE_UDP_CURRENT_VER NECP_CLIENT_STATISTICS_TYPE_UDP_VER_1 447 #define NECP_CLIENT_STATISTICS_TYPE_QUIC_CURRENT_VER NECP_CLIENT_STATISTICS_TYPE_QUIC_VER_1 448 449 #define NECP_CLIENT_STATISTICS_EVENT_INIT 0x00000000 // Register the flow 450 #define NECP_CLIENT_STATISTICS_EVENT_TIME_WAIT 0x00000001 // The flow is effectively finished but waiting on timer 451 452 struct necp_tcp_stats { 453 struct necp_stats_hdr necp_tcp_hdr; 454 struct necp_stat_counts necp_tcp_counts; 455 struct necp_basic_metadata necp_tcp_basic; 456 struct necp_extra_tcp_metadata necp_tcp_extra; 457 }; 458 459 struct necp_udp_stats { 460 struct necp_stats_hdr necp_udp_hdr; 461 struct necp_stat_counts necp_udp_counts; 462 struct necp_basic_metadata necp_udp_basic; 463 }; 464 465 466 /* 467 * The following reflects the special case for QUIC. 468 * It is a streaming protocol built on top of UDP. 469 * Therefore QUIC stats are defined as basic UDP stats 470 * with some extra meta data. 471 * TODO: For now the extra metadata is an exact replica 472 * of the metadata for TCP. However keeping that separate allows 473 * the structures to diverge later as new stats are added. 474 */ 475 #define QUIC_STATELESS_RESET_TOKEN_SIZE 16 476 #define NECP_QUIC_HAS_PROBE_STATUS 1 477 struct necp_extra_quic_metadata { 478 u_int32_t sndbufsize; 479 u_int32_t sndbufused; 480 u_int32_t txunacked; 481 u_int32_t txwindow; 482 u_int32_t txcwindow; 483 u_int32_t traffic_mgt_flags; 484 u_int32_t cc_alg_index; 485 u_int32_t state; 486 u_int8_t ssr_token[QUIC_STATELESS_RESET_TOKEN_SIZE]; 487 struct necp_connection_probe_status probestatus; 488 }; 489 490 #define necp_quic_hdr necp_quic_udp_stats.necp_udp_hdr 491 #define necp_quic_counts necp_quic_udp_stats.necp_udp_counts 492 #define necp_quic_basic necp_quic_udp_stats.necp_udp_basic 493 struct necp_quic_stats { 494 struct necp_udp_stats necp_quic_udp_stats; 495 struct necp_extra_quic_metadata necp_quic_extra; 496 }; 497 498 typedef struct necp_all_stats { 499 union { 500 struct necp_tcp_stats tcp_stats; 501 struct necp_udp_stats udp_stats; 502 struct necp_quic_stats quic_stats; 503 } all_stats_u; 504 } necp_all_stats; 505 506 // Memory for statistics is requested via a necp_stats_bufreq 507 // 508 struct necp_stats_bufreq { 509 u_int32_t necp_stats_bufreq_id __attribute__((aligned(8))); 510 u_int32_t necp_stats_bufreq_type; // NECP_CLIENT_STATISTICS_TYPE_* 511 u_int32_t necp_stats_bufreq_ver; // NECP_CLIENT_STATISTICS_TYPE_*_VER 512 u_int32_t necp_stats_bufreq_size; 513 union { 514 void *necp_stats_bufreq_addr; 515 mach_vm_address_t necp_stats_bufreq_uaddr; 516 }; 517 }; 518 519 #define NECP_CLIENT_STATISTICS_BUFREQ_ID 0xbf // Distinguishes from statistics actions taking a necp_all_stats struct 520 521 // There is a limit to the number of statistics structures that may be allocated per process, subject to change 522 // 523 #define NECP_MAX_PER_PROCESS_CLIENT_STATISTICS_STRUCTS 512 524 525 #define NECP_TCP_ECN_HEURISTICS_SYN_RST 1 526 typedef struct necp_tcp_ecn_cache { 527 u_int8_t necp_tcp_ecn_heuristics_success:1; 528 u_int8_t necp_tcp_ecn_heuristics_loss:1; 529 u_int8_t necp_tcp_ecn_heuristics_drop_rst:1; 530 u_int8_t necp_tcp_ecn_heuristics_drop_rxmt:1; 531 u_int8_t necp_tcp_ecn_heuristics_aggressive:1; 532 u_int8_t necp_tcp_ecn_heuristics_syn_rst:1; 533 } necp_tcp_ecn_cache; 534 535 #define NECP_TCP_TFO_HEURISTICS_RST 1 536 typedef struct necp_tcp_tfo_cache { 537 u_int8_t necp_tcp_tfo_cookie[NECP_TFO_COOKIE_LEN_MAX]; 538 u_int8_t necp_tcp_tfo_cookie_len; 539 u_int8_t necp_tcp_tfo_heuristics_success:1; // TFO succeeded with data in the SYN 540 u_int8_t necp_tcp_tfo_heuristics_loss:1; // TFO SYN-loss with data 541 u_int8_t necp_tcp_tfo_heuristics_middlebox:1; // TFO middlebox detected 542 u_int8_t necp_tcp_tfo_heuristics_success_req:1; // TFO succeeded with the TFO-option in the SYN 543 u_int8_t necp_tcp_tfo_heuristics_loss_req:1; // TFO SYN-loss with the TFO-option 544 u_int8_t necp_tcp_tfo_heuristics_rst_data:1; // Recevied RST upon SYN with data in the SYN 545 u_int8_t necp_tcp_tfo_heuristics_rst_req:1; // Received RST upon SYN with the TFO-option 546 } necp_tcp_tfo_cache; 547 548 #define NECP_CLIENT_CACHE_TYPE_ECN 1 // Identifies use of necp_tcp_ecn_cache 549 #define NECP_CLIENT_CACHE_TYPE_TFO 2 // Identifies use of necp_tcp_tfo_cache 550 551 #define NECP_CLIENT_CACHE_TYPE_ECN_VER_1 1 // Currently supported version for ECN 552 #define NECP_CLIENT_CACHE_TYPE_TFO_VER_1 1 // Currently supported version for TFO 553 554 typedef struct necp_cache_buffer { 555 u_int8_t necp_cache_buf_type; // NECP_CLIENT_CACHE_TYPE_* 556 u_int8_t necp_cache_buf_ver; // NECP_CLIENT_CACHE_TYPE_*_VER 557 u_int32_t necp_cache_buf_size; 558 mach_vm_address_t necp_cache_buf_addr; 559 } necp_cache_buffer; 560 561 /* 562 * NECP Client definitions 563 */ 564 #define NECP_MAX_CLIENT_PARAMETERS_SIZE 1024 565 #define NECP_MAX_CLIENT_RESULT_SIZE 512 // Legacy 566 #define NECP_BASE_CLIENT_RESULT_SIZE 1024 567 #define NECP_CLIENT_FLOW_RESULT_SIZE 512 568 569 #define NECP_OPEN_FLAG_OBSERVER 0x01 // Observers can query clients they don't own 570 #define NECP_OPEN_FLAG_BACKGROUND 0x02 // Mark this fd as backgrounded 571 #define NECP_OPEN_FLAG_PUSH_OBSERVER 0x04 // When used with the OBSERVER flag, allows updates to be pushed. Adding clients is not allowed in this mode. 572 573 #define NECP_FD_SUPPORTS_GUARD 1 574 575 #define NECP_CLIENT_ACTION_ADD 1 // Register a new client. Input: parameters in buffer; Output: client_id 576 #define NECP_CLIENT_ACTION_REMOVE 2 // Unregister a client. Input: client_id, optional struct ifnet_stats_per_flow 577 #define NECP_CLIENT_ACTION_COPY_PARAMETERS 3 // Copy client parameters. Input: client_id; Output: parameters in buffer 578 #define NECP_CLIENT_ACTION_COPY_RESULT 4 // Copy client result. Input: client_id; Output: result in buffer 579 #define NECP_CLIENT_ACTION_COPY_LIST 5 // Copy all client IDs. Output: struct necp_client_list in buffer 580 #define NECP_CLIENT_ACTION_REQUEST_NEXUS_INSTANCE 6 // Request a nexus instance from a nexus provider, optional struct necp_stats_bufreq 581 #define NECP_CLIENT_ACTION_AGENT 7 // Interact with agent. Input: client_id, agent parameters 582 #define NECP_CLIENT_ACTION_COPY_AGENT 8 // Copy agent content. Input: agent UUID; Output: struct netagent 583 #define NECP_CLIENT_ACTION_COPY_INTERFACE 9 // Copy interface details. Input: ifindex cast to UUID; Output: struct necp_interface_details 584 #define NECP_CLIENT_ACTION_SET_STATISTICS 10 // Deprecated 585 #define NECP_CLIENT_ACTION_COPY_ROUTE_STATISTICS 11 // Get route statistics. Input: client_id; Output: struct necp_stat_counts 586 #define NECP_CLIENT_ACTION_AGENT_USE 12 // Return the use count and increment the use count. Input/Output: struct necp_agent_use_parameters 587 #define NECP_CLIENT_ACTION_MAP_SYSCTLS 13 // Get the read-only sysctls memory location. Output: mach_vm_address_t 588 #define NECP_CLIENT_ACTION_UPDATE_CACHE 14 // Update heuristics and cache 589 #define NECP_CLIENT_ACTION_COPY_CLIENT_UPDATE 15 // Fetch an updated client for push-mode observer. Output: Client id, struct necp_client_observer_update in buffer 590 #define NECP_CLIENT_ACTION_COPY_UPDATED_RESULT 16 // Copy client result only if changed. Input: client_id; Output: result in buffer 591 #define NECP_CLIENT_ACTION_ADD_FLOW 17 // Add a flow. Input: client_id; Output: struct necp_client_add_flow 592 #define NECP_CLIENT_ACTION_REMOVE_FLOW 18 // Remove a flow. Input: flow_id, optional struct ifnet_stats_per_flow 593 #define NECP_CLIENT_ACTION_CLAIM 19 // Claim a client that has been added for this unique PID. Input: client_id 594 #define NECP_CLIENT_ACTION_SIGN 20 // Sign a query answer. Input: struct necp_client_signable; Output: struct necp_client_signature 595 #define NECP_CLIENT_ACTION_GET_INTERFACE_ADDRESS 21 // Get the best interface local address for given remote address. Input: ifindex, remote sockaddr; Output: matching local sockaddr 596 #define NECP_CLIENT_ACTION_ACQUIRE_AGENT_TOKEN 22 // Get a one-time use token from an agent. Input: agent UUID; Output: token buffer 597 #define NECP_CLIENT_ACTION_VALIDATE 23 // Validate a query answer. Input: struct necp_client_validatable; Output: None 598 599 #define NECP_CLIENT_PARAMETER_APPLICATION NECP_POLICY_CONDITION_APPLICATION // Requires entitlement 600 #define NECP_CLIENT_PARAMETER_REAL_APPLICATION NECP_POLICY_CONDITION_REAL_APPLICATION // Requires entitlement 601 #define NECP_CLIENT_PARAMETER_DOMAIN NECP_POLICY_CONDITION_DOMAIN 602 #define NECP_CLIENT_PARAMETER_DOMAIN_OWNER NECP_POLICY_CONDITION_DOMAIN_OWNER 603 #define NECP_CLIENT_PARAMETER_DOMAIN_CONTEXT NECP_POLICY_CONDITION_DOMAIN_CONTEXT 604 #define NECP_CLIENT_PARAMETER_TRACKER_DOMAIN NECP_POLICY_CONDITION_TRACKER_DOMAIN 605 #define NECP_CLIENT_PARAMETER_URL NECP_POLICY_CONDITION_URL 606 #define NECP_CLIENT_PARAMETER_ATTRIBUTED_BUNDLE_IDENTIFIER NECP_POLICY_CONDITION_ATTRIBUTED_BUNDLE_IDENTIFIER 607 #define NECP_CLIENT_PARAMETER_ACCOUNT NECP_POLICY_CONDITION_ACCOUNT 608 #define NECP_CLIENT_PARAMETER_PID NECP_POLICY_CONDITION_PID // Requires entitlement 609 #define NECP_CLIENT_PARAMETER_UID NECP_POLICY_CONDITION_UID // Requires entitlement 610 #define NECP_CLIENT_PARAMETER_BOUND_INTERFACE NECP_POLICY_CONDITION_BOUND_INTERFACE 611 #define NECP_CLIENT_PARAMETER_TRAFFIC_CLASS NECP_POLICY_CONDITION_TRAFFIC_CLASS 612 #define NECP_CLIENT_PARAMETER_IP_PROTOCOL NECP_POLICY_CONDITION_IP_PROTOCOL 613 #define NECP_CLIENT_PARAMETER_LOCAL_ADDRESS NECP_POLICY_CONDITION_LOCAL_ADDR 614 #define NECP_CLIENT_PARAMETER_REMOTE_ADDRESS NECP_POLICY_CONDITION_REMOTE_ADDR 615 #define NECP_CLIENT_PARAMETER_SCHEME_PORT NECP_POLICY_CONDITION_SCHEME_PORT 616 #define NECP_CLIENT_PARAMETER_APPLICATION_ID NECP_POLICY_CONDITION_APPLICATION_ID 617 #define NECP_CLIENT_PARAMETER_NEXUS_KEY 102 618 619 // "Prohibit" will never choose an interface with that property 620 #define NECP_CLIENT_PARAMETER_PROHIBIT_INTERFACE 100 // String, interface name 621 #define NECP_CLIENT_PARAMETER_PROHIBIT_IF_TYPE 101 // u_int8_t, see ifru_functional_type in <net/if.h> 622 #define NECP_CLIENT_PARAMETER_PROHIBIT_AGENT 102 // uuid_t, network agent UUID 623 #define NECP_CLIENT_PARAMETER_PROHIBIT_AGENT_TYPE 103 // struct necp_client_parameter_netagent_type 624 625 // "Require" will choose an interface with that property, or none if not found 626 #define NECP_CLIENT_PARAMETER_REQUIRE_IF_TYPE 111 // u_int8_t, see ifru_functional_type in <net/if.h> 627 #define NECP_CLIENT_PARAMETER_REQUIRE_AGENT 112 // uuid_t, network agent UUID 628 #define NECP_CLIENT_PARAMETER_REQUIRE_AGENT_TYPE 113 // struct necp_client_parameter_netagent_type 629 630 // "Prefer" will choose an interface with an agent, or best otherwise if not found 631 #define NECP_CLIENT_PARAMETER_PREFER_AGENT 122 // uuid_t, network agent UUID 632 #define NECP_CLIENT_PARAMETER_PREFER_AGENT_TYPE 123 // struct necp_client_parameter_netagent_type 633 634 // "Avoid" will choose an interface without an agent, or best otherwise if unavoidable 635 #define NECP_CLIENT_PARAMETER_AVOID_AGENT 124 // uuid_t, network agent UUID 636 #define NECP_CLIENT_PARAMETER_AVOID_AGENT_TYPE 125 // struct necp_client_parameter_netagent_type 637 638 // Use actions with NECP_CLIENT_ACTION_AGENT 639 #define NECP_CLIENT_PARAMETER_TRIGGER_AGENT 130 // uuid_t, network agent UUID 640 #define NECP_CLIENT_PARAMETER_ASSERT_AGENT 131 // uuid_t, network agent UUID 641 #define NECP_CLIENT_PARAMETER_UNASSERT_AGENT 132 // uuid_t, network agent UUID 642 #define NECP_CLIENT_PARAMETER_AGENT_ADD_GROUP_MEMBERS 133 // struct necp_client_group_action 643 #define NECP_CLIENT_PARAMETER_AGENT_REMOVE_GROUP_MEMBERS 134 // struct necp_client_group_action 644 #define NECP_CLIENT_PARAMETER_REPORT_AGENT_ERROR 135 // int32_t 645 646 #define NECP_CLIENT_PARAMETER_FALLBACK_MODE 140 // u_int8_t, see SO_FALLBACK_MODE_* values 647 648 #define NECP_CLIENT_PARAMETER_PARENT_ID 150 // uuid_t, client UUID 649 650 #define NECP_CLIENT_PARAMETER_LOCAL_ENDPOINT 200 // struct necp_client_endpoint 651 #define NECP_CLIENT_PARAMETER_REMOTE_ENDPOINT 201 // struct necp_client_endpoint 652 #define NECP_CLIENT_PARAMETER_BROWSE_DESCRIPTOR 202 // struct necp_client_endpoint 653 #define NECP_CLIENT_PARAMETER_RESOLVER_TAG 203 // struct necp_client_validatable 654 #define NECP_CLIENT_PARAMETER_ADVERTISE_DESCRIPTOR 204 // struct necp_client_endpoint 655 #define NECP_CLIENT_PARAMETER_GROUP_DESCRIPTOR 205 // struct necp_client_group 656 657 #define NECP_CLIENT_PARAMETER_DELEGATED_UPID 210 // u_int64_t, requires entitlement 658 659 #define NECP_CLIENT_PARAMETER_ETHERTYPE 220 // u_int16_t, ethertype 660 #define NECP_CLIENT_PARAMETER_TRANSPORT_PROTOCOL 221 // u_int8_t, IPPROTO_ 661 662 #define NECP_CLIENT_PARAMETER_LOCAL_ADDRESS_PREFERENCE 230 // u_int8_t, NECP_CLIENT_PARAMETER_LOCAL_ADDRESS_PREFERENCE_ 663 664 #define NECP_CLIENT_PARAMETER_LOCAL_ADDRESS_PREFERENCE_DEFAULT 0 665 #define NECP_CLIENT_PARAMETER_LOCAL_ADDRESS_PREFERENCE_TEMPORARY 1 666 #define NECP_CLIENT_PARAMETER_LOCAL_ADDRESS_PREFERENCE_STABLE 2 667 668 #define NECP_CLIENT_PARAMETER_FLAGS 250 // u_int32_t, see NECP_CLIENT_PAREMETER_FLAG_* values 669 #define NECP_CLIENT_PARAMETER_FLOW_DEMUX_PATTERN 251 // struct necp_demux_pattern 670 671 #define NECP_CLIENT_PARAMETER_FLAG_MULTIPATH 0x0001 // Get multipath interface results 672 #define NECP_CLIENT_PARAMETER_FLAG_BROWSE 0x0002 // Agent assertions on nexuses are requests to browse 673 #define NECP_CLIENT_PARAMETER_FLAG_PROHIBIT_EXPENSIVE 0x0004 // Prohibit expensive interfaces 674 #define NECP_CLIENT_PARAMETER_FLAG_LISTENER 0x0008 // Client is interested in listening for inbound connections 675 #define NECP_CLIENT_PARAMETER_FLAG_DISCRETIONARY 0x0010 // Client's traffic is discretionary, and eligible for early defuncting 676 #define NECP_CLIENT_PARAMETER_FLAG_ECN_ENABLE 0x0020 // Client is requesting to enable ECN 677 #define NECP_CLIENT_PARAMETER_FLAG_ECN_DISABLE 0x0040 // Client is requesting to disable ECN 678 #define NECP_CLIENT_PARAMETER_FLAG_TFO_ENABLE 0x0080 // Client is requesting to enable TFO 679 #define NECP_CLIENT_PARAMETER_FLAG_ONLY_PRIMARY_REQUIRES_TYPE 0x0100 // Interpret NECP_CLIENT_PARAMETER_REQUIRE_IF_TYPE only for primary interface, and allow exceptions for multipath or listeners 680 #define NECP_CLIENT_PARAMETER_FLAG_CUSTOM_ETHER 0x0200 // Client expects to open a custom ethernet channel 681 #define NECP_CLIENT_PARAMETER_FLAG_CUSTOM_IP 0x0400 // Client expects to open a custom IP protocol channel 682 #define NECP_CLIENT_PARAMETER_FLAG_INTERPOSE 0x0800 // Client expects to open an interpose filter channel 683 #define NECP_CLIENT_PARAMETER_FLAG_PROHIBIT_CONSTRAINED 0x1000 // Prohibit constrained interfaces 684 #define NECP_CLIENT_PARAMETER_FLAG_FALLBACK_TRAFFIC 0x2000 // Fallback traffic 685 #define NECP_CLIENT_PARAMETER_FLAG_INBOUND 0x4000 // Flow is inbound (passive) 686 #define NECP_CLIENT_PARAMETER_FLAG_SYSTEM_PROXY 0x8000 // Flow is a system proxy 687 #define NECP_CLIENT_PARAMETER_FLAG_KNOWN_TRACKER 0x10000 // Flow is contacting a known tracker 688 #define NECP_CLIENT_PARAMETER_FLAG_UNSAFE_SOCKET_ACCESS 0x20000 // Client allows direct access to sockets 689 #define NECP_CLIENT_PARAMETER_FLAG_NON_APP_INITIATED 0x40000 // Networking activities not initiated by application 690 #define NECP_CLIENT_PARAMETER_FLAG_THIRD_PARTY_WEB_CONTENT 0x80000 // Third-party web content, not main load 691 #define NECP_CLIENT_PARAMETER_FLAG_SILENT 0x100000 // Private browsing - do not log/track 692 #define NECP_CLIENT_PARAMETER_FLAG_APPROVED_APP_DOMAIN 0x200000 // Approved associated app domain; domain is "owned" by app 693 #define NECP_CLIENT_PARAMETER_FLAG_NO_WAKE_FROM_SLEEP 0x400000 // Don't wake from sleep on traffic for this client 694 #define NECP_CLIENT_PARAMETER_FLAG_REUSE_LOCAL 0x800000 // Request support for local address/port reuse 695 #define NECP_CLIENT_PARAMETER_FLAG_ENHANCED_PRIVACY 0x1000000 // Attempt protocol upgrade or proxy usage for more privacy 696 #define NECP_CLIENT_PARAMETER_FLAG_WEB_SEARCH_CONTENT 0x2000000 // Web search traffic 697 698 #define NECP_CLIENT_RESULT_CLIENT_ID 1 // uuid_t 699 #define NECP_CLIENT_RESULT_POLICY_RESULT 2 // u_int32_t 700 #define NECP_CLIENT_RESULT_POLICY_RESULT_PARAMETER 3 // u_int32_t 701 #define NECP_CLIENT_RESULT_FILTER_CONTROL_UNIT 4 // u_int32_t 702 #define NECP_CLIENT_RESULT_INTERFACE_INDEX 5 // u_int32_t 703 #define NECP_CLIENT_RESULT_NETAGENT 6 // struct necp_client_result_netagent 704 #define NECP_CLIENT_RESULT_FLAGS 7 // u_int32_t, see NECP_CLIENT_RESULT_FLAG_* values 705 #define NECP_CLIENT_RESULT_INTERFACE 8 // struct necp_client_result_interface 706 #define NECP_CLIENT_RESULT_INTERFACE_OPTION 9 // struct necp_client_interface_option 707 #define NECP_CLIENT_RESULT_EFFECTIVE_MTU 10 // u_int32_t 708 #define NECP_CLIENT_RESULT_FLOW 11 // TLV array of a single flow's state 709 #define NECP_CLIENT_RESULT_PROTO_CTL_EVENT 12 710 #define NECP_CLIENT_RESULT_TFO_COOKIE 13 // NECP_TFO_COOKIE_LEN_MAX 711 #define NECP_CLIENT_RESULT_TFO_FLAGS 14 // u_int8_t 712 #define NECP_CLIENT_RESULT_RECOMMENDED_MSS 15 // u_int8_t 713 #define NECP_CLIENT_RESULT_FLOW_ID 16 // uuid_t 714 #define NECP_CLIENT_RESULT_INTERFACE_TIME_DELTA 17 // u_int32_t, seconds since interface up/down 715 #define NECP_CLIENT_RESULT_REASON 18 // u_int32_t, see NECP_CLIENT_RESULT_REASON_* values 716 #define NECP_CLIENT_RESULT_FLOW_DIVERT_AGGREGATE_UNIT 19 // u_int32_t 717 #define NECP_CLIENT_RESULT_REQUEST_IN_PROCESS_FLOW_DIVERT 20 // Empty 718 719 #define NECP_CLIENT_RESULT_NEXUS_INSTANCE 100 // uuid_t 720 #define NECP_CLIENT_RESULT_NEXUS_PORT 101 // nexus_port_t 721 #define NECP_CLIENT_RESULT_NEXUS_KEY 102 // uuid_t 722 #define NECP_CLIENT_RESULT_NEXUS_PORT_FLOW_INDEX 103 // u_int32_t 723 #define NECP_CLIENT_RESULT_NEXUS_FLOW_STATS 104 // struct sk_stats_flow * 724 725 #define NECP_CLIENT_RESULT_LOCAL_ENDPOINT 200 // struct necp_client_endpoint 726 #define NECP_CLIENT_RESULT_REMOTE_ENDPOINT 201 // struct necp_client_endpoint 727 #define NECP_CLIENT_RESULT_DISCOVERED_ENDPOINT 202 // struct necp_client_endpoint, result of browse 728 #define NECP_CLIENT_RESULT_RESOLVED_ENDPOINT 203 // struct necp_client_endpoint, result of resolve 729 #define NECP_CLIENT_RESULT_LOCAL_ETHER_ADDR 204 // struct ether_addr 730 #define NECP_CLIENT_RESULT_REMOTE_ETHER_ADDR 205 // struct ether_addr 731 #define NECP_CLIENT_RESULT_EFFECTIVE_TRAFFIC_CLASS 210 // u_int32_t 732 #define NECP_CLIENT_RESULT_TRAFFIC_MGMT_BG 211 // u_int32_t, 1: background, 0: not background 733 #define NECP_CLIENT_RESULT_GATEWAY 212 // struct necp_client_endpoint 734 #define NECP_CLIENT_RESULT_GROUP_MEMBER 213 // struct necp_client_endpoint 735 #define NECP_CLIENT_RESULT_NAT64 214 // struct ipv6_prefix[NAT64_MAX_NUM_PREFIXES] 736 #define NECP_CLIENT_RESULT_ESTIMATED_THROUGHPUT 215 // struct necp_client_result_estimated_throughput 737 #define NECP_CLIENT_RESULT_AGENT_ERROR 216 // struct necp_client_result_agent_error 738 739 #define NECP_CLIENT_RESULT_FLAG_IS_LOCAL 0x0001 // Routes to this device 740 #define NECP_CLIENT_RESULT_FLAG_IS_DIRECT 0x0002 // Routes to directly accessible peer 741 #define NECP_CLIENT_RESULT_FLAG_HAS_IPV4 0x0004 // Supports IPv4 742 #define NECP_CLIENT_RESULT_FLAG_HAS_IPV6 0x0008 // Supports IPv6 743 #define NECP_CLIENT_RESULT_FLAG_DEFUNCT 0x0010 // Defunct 744 #define NECP_CLIENT_RESULT_FLAG_SATISFIED 0x0020 // Satisfied path 745 #define NECP_CLIENT_RESULT_FLAG_FLOW_ASSIGNED 0x0040 // Assigned, the flow is active 746 #define NECP_CLIENT_RESULT_FLAG_FLOW_VIABLE 0x0080 // Viable, the flow has a valid route 747 #define NECP_CLIENT_RESULT_FLAG_PROBE_CONNECTIVITY 0x0100 // Flow should probe connectivity 748 #define NECP_CLIENT_RESULT_FLAG_ECN_ENABLED 0x0200 // ECN should be used 749 #define NECP_CLIENT_RESULT_FLAG_FAST_OPEN_BLOCKED 0x0400 // Fast open should not be used 750 #define NECP_CLIENT_RESULT_FLAG_LINK_QUALITY_ABORT 0x0800 // Link quality is very bad, recommend close connections 751 #define NECP_CLIENT_RESULT_FLAG_ALLOW_QOS_MARKING 0x1000 // QoS marking is allowed 752 #define NECP_CLIENT_RESULT_FLAG_HAS_NAT64 0x2000 // Has NAT64 prefix 753 #define NECP_CLIENT_RESULT_FLAG_INTERFACE_LOW_POWER 0x4000 // Interface is in low-power mode 754 #define NECP_CLIENT_RESULT_FLAG_SPECIFIC_LISTENER 0x8000 // Listener should not listen on all interfaces 755 #define NECP_CLIENT_RESULT_FLAG_KEXT_FILTER_PRESENT 0x10000 // Kernel extension filter present 756 #define NECP_CLIENT_RESULT_FLAG_PF_RULES_PRESENT 0x20000 // Firewall rules present 757 #define NECP_CLIENT_RESULT_FLAG_ALF_PRESENT 0x40000 // Application Firewall enabled 758 #define NECP_CLIENT_RESULT_FLAG_PARENTAL_CONTROLS_PRESENT 0x80000 // Parental Controls present 759 #define NECP_CLIENT_RESULT_FLAG_IS_GLOBAL_INTERNET 0x100000 // Routes to global Internet 760 761 762 #define NECP_CLIENT_RESULT_FLAG_FORCE_UPDATE (NECP_CLIENT_RESULT_FLAG_HAS_IPV4 | NECP_CLIENT_RESULT_FLAG_HAS_IPV6 | NECP_CLIENT_RESULT_FLAG_HAS_NAT64 | NECP_CLIENT_RESULT_FLAG_INTERFACE_LOW_POWER) 763 764 #define NECP_CLIENT_RESULT_FAST_OPEN_SND_PROBE 0x01 // DEPRECATED - Fast open send probe 765 #define NECP_CLIENT_RESULT_FAST_OPEN_RCV_PROBE 0x02 // DEPRECATED - Fast open receive probe 766 767 #define NECP_CLIENT_RESULT_RECOMMENDED_MSS_NONE 0x01 768 #define NECP_CLIENT_RESULT_RECOMMENDED_MSS_LOW 0x02 769 #define NECP_CLIENT_RESULT_RECOMMENDED_MSS_MEDIUM 0x04 770 771 #define NECP_CLIENT_RESULT_REASON_EXPENSIVE_PROHIBITED 1 // Expensive networks were prohibited 772 #define NECP_CLIENT_RESULT_REASON_CONSTRAINED_PROHIBITED 2 // Constrained networks were prohibited 773 #define NECP_CLIENT_RESULT_REASON_CELLULAR_DENIED 3 // Denied by a cellular route rule 774 #define NECP_CLIENT_RESULT_REASON_WIFI_DENIED 4 // Denied by a wifi route rule 775 #define NECP_CLIENT_RESULT_REASON_LOCAL_NETWORK_PROHIBITED 5 // Local network access prohibited 776 777 struct necp_interface_signature { 778 u_int8_t signature[IFNET_SIGNATURELEN]; 779 u_int8_t signature_len; 780 }; 781 782 struct necp_interface_details { 783 char name[IFXNAMSIZ]; 784 u_int32_t index; 785 u_int32_t generation; 786 u_int32_t functional_type; 787 u_int32_t delegate_index; 788 u_int32_t flags; // see NECP_INTERFACE_FLAG_* 789 u_int32_t mtu; 790 struct necp_interface_signature ipv4_signature; 791 struct necp_interface_signature ipv6_signature; 792 u_int32_t ipv4_netmask; 793 u_int32_t ipv4_broadcast; 794 /* 795 * This serves as a temporary header guard to protect libnetcore builds 796 * until the xnu changes are available in the build. 797 * XXX: Should be removed in a future build. 798 */ 799 #define NECP_INTERFACE_SUPPORTS_TSO 1 800 u_int32_t tso_max_segment_size_v4; 801 u_int32_t tso_max_segment_size_v6; 802 #define NECP_INTERFACE_SUPPORTS_HWCSUM 1 803 u_int32_t hwcsum_flags; 804 u_int8_t radio_type; 805 u_int8_t radio_channel; 806 }; 807 808 #define NECP_INTERFACE_FLAG_EXPENSIVE 0x0001 809 #define NECP_INTERFACE_FLAG_TXSTART 0X0002 810 #define NECP_INTERFACE_FLAG_NOACKPRI 0x0004 811 #define NECP_INTERFACE_FLAG_3CARRIERAGG 0x0008 812 #define NECP_INTERFACE_FLAG_IS_LOW_POWER 0x0010 813 #define NECP_INTERFACE_FLAG_MPK_LOG 0x0020 // Multi-layer Packet Logging 814 #define NECP_INTERFACE_FLAG_CONSTRAINED 0x0040 815 #define NECP_INTERFACE_FLAG_HAS_NETMASK 0x0080 816 #define NECP_INTERFACE_FLAG_HAS_BROADCAST 0x0100 817 #define NECP_INTERFACE_FLAG_SUPPORTS_MULTICAST 0x0200 818 #define NECP_INTERFACE_FLAG_HAS_DNS 0x0400 819 #define NECP_INTERFACE_FLAG_HAS_NAT64 0x0800 820 #define NECP_INTERFACE_FLAG_IPV4_ROUTABLE 0x1000 821 #define NECP_INTERFACE_FLAG_IPV6_ROUTABLE 0x2000 822 823 struct necp_client_parameter_netagent_type { 824 char netagent_domain[32]; 825 char netagent_type[32]; 826 }; 827 828 struct necp_client_result_netagent { 829 u_int32_t generation; 830 uuid_t netagent_uuid; 831 }; 832 833 struct necp_client_result_interface { 834 u_int32_t generation; 835 u_int32_t index; 836 }; 837 838 struct necp_client_result_estimated_throughput { 839 u_int8_t up; 840 u_int8_t down; 841 }; 842 843 struct necp_client_result_agent_error { 844 u_int32_t code; 845 u_int8_t domain; 846 }; 847 848 #define NECP_USES_INTERFACE_OPTIONS_FOR_BROWSE 1 849 850 struct necp_client_interface_option { 851 u_int32_t interface_index; 852 u_int32_t interface_generation; 853 uuid_t nexus_agent; 854 }; 855 856 #define NECP_CLIENT_ENDPOINT_TYPE_APPLICATION_SERVICE 6 857 858 struct necp_client_endpoint { 859 union { 860 struct sockaddr sa; 861 struct sockaddr_in sin; 862 struct sockaddr_in6 sin6; 863 struct { 864 u_int8_t endpoint_length; 865 u_int8_t endpoint_family; // Use AF_UNSPEC to target a name 866 u_int16_t endpoint_port; 867 u_int32_t endpoint_type; // Client-specific type 868 char endpoint_data[0]; // Type-specific endpoint value 869 } endpoint; 870 } u; 871 }; 872 873 struct necp_client_group { 874 u_int32_t group_type; 875 uuid_t group_id; 876 }; 877 878 struct necp_client_list { 879 u_int32_t client_count; 880 uuid_t clients[0]; 881 }; 882 883 struct kev_necp_policies_changed_data { 884 u_int32_t changed_count; // Defaults to 0. 885 }; 886 887 #define NECP_CLIENT_FLOW_FLAGS_ALLOW_NEXUS 0x01 // Request a nexus instance upon adding a flow 888 #define NECP_CLIENT_FLOW_FLAGS_USE_CLIENT_ID 0x02 // Register the client ID rather than the flow registration ID with network agents 889 #define NECP_CLIENT_FLOW_FLAGS_BROWSE 0x04 // Create request with a browse agent 890 #define NECP_CLIENT_FLOW_FLAGS_RESOLVE 0x08 // Create request with a resolution agent 891 #define NECP_CLIENT_FLOW_FLAGS_OVERRIDE_ADDRESS 0x10 // Flow has a different remote address than the parent flow 892 #define NECP_CLIENT_FLOW_FLAGS_OVERRIDE_IP_PROTOCOL 0x20 // Flow has a different IP protocol than the parent flow 893 894 struct necp_client_flow_stats { 895 u_int32_t stats_type; // NECP_CLIENT_STATISTICS_TYPE_* 896 u_int32_t stats_version; // NECP_CLIENT_STATISTICS_TYPE_*_VER 897 u_int32_t stats_size; 898 mach_vm_address_t stats_addr; 899 }; 900 901 struct necp_client_add_flow { 902 uuid_t agent_uuid; 903 uuid_t registration_id; 904 u_int16_t flags; // NECP_CLIENT_FLOW_FLAGS_* 905 u_int16_t stats_request_count; 906 struct necp_client_flow_stats stats_requests[0]; 907 // sockaddr for override endpoint 908 // uint8 for override ip protocol 909 } __attribute__((__packed__)); 910 911 struct necp_agent_use_parameters { 912 uuid_t agent_uuid; 913 uint64_t out_use_count; 914 }; 915 916 struct necp_client_group_action { 917 uuid_t agent_uuid; 918 u_int16_t group_member_count; 919 struct necp_client_endpoint group_members[0]; 920 } __attribute__((__packed__)); 921 922 struct necp_client_flow_protoctl_event { 923 uint32_t protoctl_event_code; 924 uint32_t protoctl_event_val; 925 /* TCP seq number is in host byte order */ 926 uint32_t protoctl_event_tcp_seq_num; 927 }; 928 929 #define NECP_CLIENT_UPDATE_TYPE_PARAMETERS 1 // Parameters, for a new client 930 #define NECP_CLIENT_UPDATE_TYPE_RESULT 2 // Result, for a udpated client 931 #define NECP_CLIENT_UPDATE_TYPE_REMOVE 3 // Empty, for a removed client 932 933 struct necp_client_observer_update { 934 u_int32_t update_type; // NECP_CLIENT_UPDATE_TYPE_* 935 u_int8_t tlv_buffer[0]; // Parameters or result as TLVs, based on type 936 }; 937 938 // These sign types are tied to specific clients. 939 // The client_id UUID is then the NECP client UUID that generated the query. 940 #define NECP_CLIENT_SIGN_TYPE_RESOLVER_ANSWER 1 // struct necp_client_host_resolver_answer 941 #define NECP_CLIENT_SIGN_TYPE_BROWSE_RESULT 2 // struct necp_client_browse_result 942 #define NECP_CLIENT_SIGN_TYPE_SERVICE_RESOLVER_ANSWER 3 // struct necp_client_service_resolver_answer 943 944 // These sign types are valid for system-wide use. 945 // The client_id UUID is a unique per-query UUID. 946 // These should be generated only on behalf of trusted or entitled processes. 947 #define NECP_CLIENT_SIGN_TYPE_SYSTEM_RESOLVER_ANSWER 4 // struct necp_client_host_resolver_answer 948 #define NECP_CLIENT_SIGN_TYPE_SYSTEM_BROWSE_RESULT 5 // struct necp_client_browse_result 949 #define NECP_CLIENT_SIGN_TYPE_SYSTEM_SERVICE_RESOLVER_ANSWER 6 // struct necp_client_service_resolver_answer 950 951 struct necp_client_signature { 952 u_int8_t signed_tag[32]; 953 } __attribute__((__packed__)); 954 955 // 956 struct necp_client_signable { 957 uuid_t client_id; // Interpretation depends on sign_type 958 u_int32_t sign_type; 959 u_int8_t signable_data[0]; 960 } __attribute__((__packed__)); 961 962 struct necp_client_resolver_answer { 963 uuid_t client_id; 964 u_int32_t sign_type; 965 union sockaddr_in_4_6 address_answer; // Can include port 966 u_int32_t hostname_length; 967 char hostname[0]; 968 } __attribute__((__packed__)); 969 970 struct necp_client_host_resolver_answer { 971 struct necp_client_signable header; 972 u_int32_t metadata_hash; // Extra metadata that can be signed along with the answer, such as a network signature. 973 union sockaddr_in_4_6 address_answer; // Can include port 974 u_int32_t hostname_length; 975 char hostname[0]; 976 } __attribute__((__packed__)); 977 978 struct necp_client_browse_result { 979 struct necp_client_signable header; 980 u_int32_t metadata_hash; // Extra metadata that can be signed along with the service, which may include a TXT record or a network signature 981 u_int16_t service_length; 982 char service[0]; 983 } __attribute__((__packed__)); 984 985 struct necp_client_service_resolver_answer { 986 struct necp_client_signable header; 987 u_int32_t metadata_hash; // Extra metadata that can be signed along with the service, which may include a TXT record or a network signature 988 u_int16_t service_length; 989 u_int16_t port; 990 u_int16_t hostname_length; 991 char service[0]; 992 char hostname[0]; 993 } __attribute__((__packed__)); 994 995 struct necp_client_validatable { 996 struct necp_client_signature signature; 997 struct necp_client_signable signable; 998 } __attribute__((__packed__)); 999 1000 #define NECP_CLIENT_ACTION_SIGN_MAX_STRING_LENGTH 1024 1001 1002 #define NECP_CLIENT_ACTION_SIGN_TAG_LENGTH 32 1003 1004 #define NECP_CLIENT_ACTION_SIGN_DEFAULT_DATA_LENGTH 128 1005 #define NECP_CLIENT_ACTION_SIGN_MAX_TOTAL_LENGTH 4096 1006 1007 #define NECP_FILTER_UNIT_NO_FILTER UINT32_MAX // Reserved filter unit value that prohibits all filters and socket filters 1008 1009 /* 1010 * The sysctl "net.necp.necp_drop_dest_level" controls the global drop rule policy for 1011 * a set of destinations addresses at the given level -- the drop rule is the last one 1012 * to be evaluated at this level. 1013 */ 1014 #define MAX_NECP_DROP_DEST_LEVEL_ADDRS 8 1015 1016 struct necp_drop_dest_entry { 1017 u_int32_t level; // priority level 1018 u_int32_t order; // session order (read only via sysctl) 1019 struct necp_policy_condition_addr cond_addr; 1020 }; 1021 1022 struct necp_drop_dest_policy { 1023 u_int32_t entry_count; 1024 struct necp_drop_dest_entry entries[MAX_NECP_DROP_DEST_LEVEL_ADDRS]; 1025 }; 1026 1027 1028 #define NECP_DEMUX_MAX_LEN 32 1029 struct necp_demux_pattern { 1030 uint16_t offset; 1031 uint16_t len; 1032 uint8_t mask[NECP_DEMUX_MAX_LEN]; 1033 uint8_t value[NECP_DEMUX_MAX_LEN]; 1034 }; 1035 1036 #ifdef BSD_KERNEL_PRIVATE 1037 #include <stdbool.h> 1038 #include <sys/socketvar.h> 1039 #include <sys/kern_control.h> 1040 #include <netinet/ip_var.h> 1041 #include <netinet6/ip6_var.h> 1042 #include <net/if_var.h> 1043 #include <sys/syslog.h> 1044 #include <net/network_agent.h> 1045 #include <net/ethernet.h> 1046 #include <os/log.h> 1047 #if SKYWALK 1048 #include <skywalk/namespace/netns.h> 1049 #endif /* SKYWALK */ 1050 1051 1052 SYSCTL_DECL(_net_necp); 1053 1054 extern os_log_t necp_log_handle; 1055 extern os_log_t necp_data_trace_log_handle; 1056 1057 #define NECPLOG(level, format, ...) do { \ 1058 if (level == LOG_ERR) { \ 1059 os_log_error(necp_log_handle, "%s: " format "\n", __FUNCTION__, __VA_ARGS__); \ 1060 } else { \ 1061 os_log(necp_log_handle, "%s: " format "\n", __FUNCTION__, __VA_ARGS__); \ 1062 } \ 1063 } while (0) 1064 1065 #define NECPLOG0(level, msg) do { \ 1066 if (level == LOG_ERR) { \ 1067 os_log_error(necp_log_handle, "%s: %s\n", __FUNCTION__, msg); \ 1068 } else { \ 1069 os_log(necp_log_handle, "%s: %s\n", __FUNCTION__, msg); \ 1070 } \ 1071 } while (0) 1072 1073 #define NECPDATATRACELOG(level, format, ...) do { \ 1074 if (level == LOG_ERR) { \ 1075 os_log_error(necp_data_trace_log_handle, "%s: " format "\n", __FUNCTION__, __VA_ARGS__); \ 1076 } else { \ 1077 os_log(necp_data_trace_log_handle, "%s: " format "\n", __FUNCTION__, __VA_ARGS__); \ 1078 } \ 1079 } while (0) 1080 1081 enum necp_fd_type_t { 1082 necp_fd_type_invalid = 0, 1083 necp_fd_type_session = 1, 1084 necp_fd_type_client = 2, 1085 }; 1086 1087 union necp_sockaddr_union { 1088 #if !__has_ptrcheck 1089 struct sockaddr sa; 1090 #endif 1091 struct __sockaddr_header sah; 1092 struct sockaddr_in sin; 1093 struct sockaddr_in6 sin6; 1094 }; 1095 1096 /* 1097 * kstats 1098 * The ustats and kstats region are mirrored. So when we allocate with 1099 * skmem_cache from kstats region, we also get an ustats object. To tie them 1100 * together, kstats has an extra *necp_stats_ustats pointer pointing to the 1101 * ustats object 1102 */ 1103 struct necp_all_kstats { 1104 struct necp_all_stats necp_stats_comm; /* kernel private stats snapshot */ 1105 struct necp_all_stats *necp_stats_ustats; /* points to user-visible stats (in shared ustats region) */ 1106 }; 1107 1108 extern void necp_client_init(void); 1109 extern int necp_application_find_policy_match_internal(proc_t proc, u_int8_t *parameters, u_int32_t parameters_size, 1110 struct necp_aggregate_result *returned_result, 1111 u_int32_t *flags, u_int32_t *reason, u_int required_interface_index, 1112 const union necp_sockaddr_union *override_local_addr, 1113 const union necp_sockaddr_union *override_remote_addr, 1114 struct necp_client_endpoint *returned_v4_gateway, 1115 struct necp_client_endpoint *returned_v6_gateway, 1116 struct rtentry **returned_route, bool ignore_address, 1117 bool has_client, 1118 uuid_t *returned_override_euuid); 1119 /* 1120 * TLV utilities 1121 * 1122 * Note that these functions (other than necp_buffer_find_tlv) do not check the length of the entire buffer, 1123 * so the caller must be sure that the entire TLV is within bounds. 1124 */ 1125 struct necp_tlv_header { 1126 u_int8_t type; 1127 u_int32_t length; 1128 } __attribute__((__packed__)); 1129 1130 extern u_int8_t *necp_buffer_write_tlv(u_int8_t *cursor, u_int8_t type, u_int32_t length, const void *value, 1131 u_int8_t *buffer, u_int32_t buffer_length); 1132 extern u_int8_t *necp_buffer_write_tlv_if_different(u_int8_t *cursor, u_int8_t type, 1133 u_int32_t length, const void *value, bool *updated, 1134 u_int8_t *buffer, u_int32_t buffer_length); 1135 extern u_int8_t necp_buffer_get_tlv_type(u_int8_t *buffer, int tlv_offset); 1136 extern u_int32_t necp_buffer_get_tlv_length(u_int8_t *buffer, int tlv_offset); 1137 extern u_int8_t *necp_buffer_get_tlv_value(u_int8_t *buffer, int tlv_offset, u_int32_t *value_size); 1138 extern int necp_buffer_find_tlv(u_int8_t *buffer, u_int32_t buffer_length, int offset, u_int8_t type, int *err, int next); 1139 1140 #define NECPCTL_DROP_ALL_LEVEL 1 /* Drop all packets if no policy matches above this level */ 1141 #define NECPCTL_DEBUG 2 /* Log all kernel policy matches */ 1142 #define NECPCTL_PASS_LOOPBACK 3 /* Pass all loopback traffic */ 1143 #define NECPCTL_PASS_KEEPALIVES 4 /* Pass all kernel-generated keepalive traffic */ 1144 #define NECPCTL_SOCKET_POLICY_COUNT 5 /* Count of all socket-level policies */ 1145 #define NECPCTL_SOCKET_NON_APP_POLICY_COUNT 6 /* Count of non-per-app socket-level policies */ 1146 #define NECPCTL_IP_POLICY_COUNT 7 /* Count of all ip-level policies */ 1147 #define NECPCTL_SESSION_COUNT 8 /* Count of NECP sessions */ 1148 #define NECPCTL_CLIENT_FD_COUNT 9 /* Count of NECP client fds */ 1149 #define NECPCTL_CLIENT_COUNT 10 /* Count of NECP clients */ 1150 #define NECPCTL_ARENA_COUNT 11 /* Count of NECP arenas (stats, etc) */ 1151 #define NECPCTL_NEXUS_FLOW_COUNT 12 /* Count of NECP nexus flows */ 1152 #define NECPCTL_SOCKET_FLOW_COUNT 13 /* Count of NECP socket flows */ 1153 #define NECPCTL_IF_FLOW_COUNT 14 /* Count of NECP socket flows */ 1154 #define NECPCTL_OBSERVER_FD_COUNT 15 /* Count of NECP observer fds */ 1155 #define NECPCTL_OBSERVER_MESSAGE_LIMIT 16 /* Number of of NECP observer messages allowed to be queued */ 1156 #define NECPCTL_SYSCTL_ARENA_COUNT 17 /* Count of sysctl arenas */ 1157 #define NECPCTL_DROP_UNENTITLED_LEVEL 18 /* Drop unentitled process traffic above this level */ 1158 #define NECPCTL_PASS_INTERPOSE 19 /* Pass interpose */ 1159 #define NECPCTL_RESTRICT_MULTICAST 20 /* Restrict multicast access */ 1160 #define NECPCTL_DEDUP_POLICIES 21 /* Dedup overlapping policies */ 1161 #define NECPCTL_CLIENT_TRACING_LEVEL 22 /* Client tracing level */ 1162 #define NECPCTL_CLIENT_TRACING_PID 23 /* Apply client tracing only to specified pid */ 1163 #define NECPCTL_DROP_MANAGEMENT_LEVEL 24 /* Drop management traffic at this level */ 1164 1165 #define NECP_LOOPBACK_PASS_ALL 1 // Pass all loopback traffic 1166 #define NECP_LOOPBACK_PASS_WITH_FILTER 2 // Pass all loopback traffic, but activate content filter and/or flow divert if applicable 1167 1168 #define NECPCTL_NAMES { \ 1169 { 0, 0 }, \ 1170 { "drop_all_level", CTLTYPE_INT }, \ 1171 { "debug", CTLTYPE_INT }, \ 1172 { "pass_loopback", CTLTYPE_INT }, \ 1173 { "pass_keepalives", CTLTYPE_INT }, \ 1174 { "pass_interpose", CTLTYPE_INT }, \ 1175 } 1176 1177 typedef u_int32_t necp_kernel_policy_id; 1178 #define NECP_KERNEL_POLICY_ID_NONE 0 1179 #define NECP_KERNEL_POLICY_ID_NO_MATCH 1 1180 #define NECP_KERNEL_POLICY_ID_FIRST_VALID_SOCKET 2 1181 #define NECP_KERNEL_POLICY_ID_FIRST_VALID_IP UINT16_MAX 1182 1183 typedef u_int32_t necp_app_id; 1184 1185 #define NECP_KERNEL_POLICY_RESULT_NONE 0 1186 #define NECP_KERNEL_POLICY_RESULT_PASS NECP_POLICY_RESULT_PASS 1187 #define NECP_KERNEL_POLICY_RESULT_SKIP NECP_POLICY_RESULT_SKIP 1188 #define NECP_KERNEL_POLICY_RESULT_DROP NECP_POLICY_RESULT_DROP 1189 #define NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT NECP_POLICY_RESULT_SOCKET_DIVERT 1190 #define NECP_KERNEL_POLICY_RESULT_SOCKET_FILTER NECP_POLICY_RESULT_SOCKET_FILTER 1191 #define NECP_KERNEL_POLICY_RESULT_IP_TUNNEL NECP_POLICY_RESULT_IP_TUNNEL 1192 #define NECP_KERNEL_POLICY_RESULT_IP_FILTER NECP_POLICY_RESULT_IP_FILTER 1193 #define NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED NECP_POLICY_RESULT_SOCKET_SCOPED 1194 #define NECP_KERNEL_POLICY_RESULT_ROUTE_RULES NECP_POLICY_RESULT_ROUTE_RULES 1195 #define NECP_KERNEL_POLICY_RESULT_USE_NETAGENT NECP_POLICY_RESULT_USE_NETAGENT 1196 #define NECP_KERNEL_POLICY_RESULT_NETAGENT_SCOPED NECP_POLICY_RESULT_NETAGENT_SCOPED 1197 #define NECP_KERNEL_POLICY_RESULT_SCOPED_DIRECT NECP_POLICY_RESULT_SCOPED_DIRECT 1198 #define NECP_KERNEL_POLICY_RESULT_ALLOW_UNENTITLED NECP_POLICY_RESULT_ALLOW_UNENTITLED 1199 #define NECP_KERNEL_POLICY_RESULT_REMOVE_NETAGENT NECP_POLICY_RESULT_REMOVE_NETAGENT 1200 1201 #define NECP_KERNEL_POLICY_PASS_NO_SKIP_IPSEC NECP_POLICY_PASS_NO_SKIP_IPSEC 1202 #define NECP_KERNEL_POLICY_PASS_PF_TAG NECP_POLICY_PASS_PF_TAG 1203 1204 #define NECP_KERNEL_POLICY_DROP_FLAG_LOCAL_NETWORK NECP_POLICY_DROP_FLAG_LOCAL_NETWORK 1205 1206 typedef struct { 1207 u_int32_t identifier; 1208 u_int32_t data; 1209 } necp_kernel_policy_service; 1210 1211 typedef union { 1212 u_int tunnel_interface_index; 1213 u_int scoped_interface_index; 1214 u_int32_t flow_divert_control_unit; 1215 u_int32_t filter_control_unit; 1216 u_int32_t skip_policy_order; 1217 u_int32_t route_rule_id; 1218 u_int32_t netagent_id; 1219 u_int32_t pass_flags; 1220 u_int32_t drop_flags; 1221 necp_kernel_policy_service service; 1222 } necp_kernel_policy_result_parameter; 1223 1224 enum necp_boolean_state { 1225 necp_boolean_state_unknown = 0, 1226 necp_boolean_state_false = 1, 1227 necp_boolean_state_true = 2, 1228 }; 1229 1230 struct necp_kernel_socket_policy { 1231 LIST_ENTRY(necp_kernel_socket_policy) chain; 1232 necp_kernel_policy_id id; 1233 necp_policy_order order; 1234 u_int32_t session_order; 1235 int session_pid; 1236 1237 u_int64_t condition_mask; 1238 u_int64_t condition_negated_mask; 1239 u_int32_t cond_client_flags; 1240 necp_kernel_policy_id cond_policy_id; 1241 u_int32_t cond_app_id; // Locally assigned ID value stored 1242 u_int32_t cond_real_app_id; // Locally assigned ID value stored 1243 char *cond_custom_entitlement; // String 1244 u_int32_t cond_account_id; // Locally assigned ID value stored 1245 char *cond_domain; // String 1246 u_int8_t cond_domain_dot_count; // Number of dots in cond_domain 1247 u_int32_t cond_domain_filter; 1248 pid_t cond_pid; 1249 uid_t cond_uid; 1250 uid_t cond_real_uid; 1251 ifnet_t cond_bound_interface; // Matches specific binding only 1252 struct necp_policy_condition_tc_range cond_traffic_class; // Matches traffic class in range 1253 u_int16_t cond_protocol; // Matches IP protcol number 1254 union necp_sockaddr_union cond_local_start; // Matches local IP address (or start) 1255 union necp_sockaddr_union cond_local_end; // Matches IP address range 1256 u_int8_t cond_local_prefix; // Defines subnet 1257 union necp_sockaddr_union cond_remote_start; // Matches remote IP address (or start) 1258 union necp_sockaddr_union cond_remote_end; // Matches IP address range 1259 u_int8_t cond_remote_prefix; // Defines subnet 1260 struct necp_policy_condition_agent_type cond_agent_type; 1261 struct necp_policy_condition_sdk_version cond_sdk_version; 1262 char *cond_signing_identifier; // String 1263 char *cond_url;// String 1264 u_int16_t cond_packet_filter_tags; 1265 u_int16_t cond_scheme_port; 1266 int32_t cond_pid_version; 1267 1268 necp_kernel_policy_result result; 1269 necp_kernel_policy_result_parameter result_parameter; 1270 }; 1271 1272 struct necp_kernel_ip_output_policy { 1273 LIST_ENTRY(necp_kernel_ip_output_policy) chain; 1274 necp_kernel_policy_id id; 1275 necp_policy_order suborder; 1276 necp_policy_order order; 1277 u_int32_t session_order; 1278 int session_pid; 1279 1280 u_int64_t condition_mask; 1281 u_int64_t condition_negated_mask; 1282 necp_kernel_policy_id cond_policy_id; 1283 ifnet_t cond_bound_interface; // Matches specific binding only 1284 u_int16_t cond_protocol; // Matches IP protcol number 1285 union necp_sockaddr_union cond_local_start; // Matches local IP address (or start) 1286 union necp_sockaddr_union cond_local_end; // Matches IP address range 1287 u_int8_t cond_local_prefix; // Defines subnet 1288 union necp_sockaddr_union cond_remote_start; // Matches remote IP address (or start) 1289 union necp_sockaddr_union cond_remote_end; // Matches IP address range 1290 u_int8_t cond_remote_prefix; // Defines subnet 1291 u_int32_t cond_last_interface_index; 1292 u_int16_t cond_packet_filter_tags; 1293 u_int16_t cond_scheme_port; 1294 1295 necp_kernel_policy_result result; 1296 necp_kernel_policy_result_parameter result_parameter; 1297 }; 1298 1299 #define MAX_KERNEL_SOCKET_POLICIES 1 1300 #define MAX_KERNEL_IP_OUTPUT_POLICIES 4 1301 struct necp_session_policy { 1302 LIST_ENTRY(necp_session_policy) chain; 1303 bool applied; // Applied into the kernel table 1304 bool pending_deletion; // Waiting to be removed from kernel table 1305 bool pending_update; // Policy has been modified since creation/last application 1306 necp_policy_id local_id; 1307 necp_policy_order order; 1308 u_int8_t *result; 1309 u_int32_t result_size; 1310 u_int8_t *conditions; // Array of conditions, each with a u_int32_t length at start 1311 u_int32_t conditions_size; 1312 u_int8_t *route_rules; // Array of route rules, each with a u_int32_t length at start 1313 u_int32_t route_rules_size; 1314 1315 uuid_t applied_app_uuid; 1316 uuid_t applied_real_app_uuid; 1317 char *applied_account; 1318 u_int32_t applied_account_size; 1319 1320 uuid_t applied_result_uuid; 1321 1322 u_int32_t applied_route_rules_id; 1323 1324 necp_kernel_policy_id kernel_socket_policies[MAX_KERNEL_SOCKET_POLICIES]; 1325 necp_kernel_policy_id kernel_ip_output_policies[MAX_KERNEL_IP_OUTPUT_POLICIES]; 1326 }; 1327 1328 struct necp_aggregate_socket_result { 1329 necp_kernel_policy_result result; 1330 necp_kernel_policy_result_parameter result_parameter; 1331 necp_kernel_policy_filter filter_control_unit; 1332 u_int32_t flow_divert_aggregate_unit; 1333 u_int32_t route_rule_id; 1334 int32_t qos_marking_gencount; 1335 }; 1336 1337 struct necp_inpcb_result { 1338 u_int32_t app_id; 1339 necp_kernel_policy_id policy_id; 1340 necp_kernel_policy_id skip_policy_id; 1341 int32_t policy_gencount; 1342 u_int32_t flowhash; 1343 u_int32_t network_denied_notifies;// Notification count 1344 struct necp_aggregate_socket_result results; 1345 }; 1346 1347 extern void necp_init(void); 1348 1349 struct inp_necp_attributes; 1350 extern errno_t necp_set_socket_attributes(struct inp_necp_attributes *attributes, struct sockopt *sopt); 1351 extern errno_t necp_get_socket_attributes(struct inp_necp_attributes *attributes, struct sockopt *sopt); 1352 extern errno_t necp_set_socket_domain_attributes(struct socket *so, const char *domain, const char *domain_owner); 1353 extern int necp_set_socket_resolver_signature(struct inpcb *inp, struct sockopt *sopt); 1354 extern int necp_get_socket_resolver_signature(struct inpcb *inp, struct sockopt *sopt); 1355 extern bool necp_socket_has_resolver_signature(struct inpcb *inp); 1356 extern bool necp_socket_resolver_signature_matches_address(struct inpcb *inp, union necp_sockaddr_union *address); 1357 extern void necp_inpcb_remove_cb(struct inpcb *inp); 1358 extern void necp_inpcb_dispose(struct inpcb *inp); 1359 1360 extern u_int32_t necp_socket_get_content_filter_control_unit(struct socket *so); 1361 1362 extern bool necp_socket_should_use_flow_divert(struct inpcb *inp); 1363 extern u_int32_t necp_socket_get_flow_divert_control_unit(struct inpcb *inp, uint32_t *aggregate_unit); 1364 1365 extern bool necp_socket_should_rescope(struct inpcb *inp); 1366 extern u_int necp_socket_get_rescope_if_index(struct inpcb *inp); 1367 extern u_int32_t necp_socket_get_effective_mtu(struct inpcb *inp, u_int32_t current_mtu); 1368 1369 extern bool necp_socket_is_allowed_to_recv_on_interface(struct inpcb *inp, ifnet_t interface); 1370 1371 extern bool necp_socket_is_allowed_to_send_recv(struct inpcb *inp, ifnet_t input_interface, u_int16_t pf_tag, 1372 necp_kernel_policy_id *return_policy_id, 1373 u_int32_t *return_route_rule_id, 1374 necp_kernel_policy_id *return_skip_policy_id, u_int32_t *return_pass_flags); 1375 extern bool necp_socket_is_allowed_to_send_recv_v4(struct inpcb *inp, u_int16_t local_port, 1376 u_int16_t remote_port, struct in_addr *local_addr, 1377 struct in_addr *remote_addr, ifnet_t input_interface, u_int16_t pf_tag, 1378 necp_kernel_policy_id *return_policy_id, u_int32_t *return_route_rule_id, 1379 necp_kernel_policy_id *return_skip_policy_id, u_int32_t *return_pass_flags); 1380 extern bool necp_socket_is_allowed_to_send_recv_v6(struct inpcb *inp, u_int16_t local_port, 1381 u_int16_t remote_port, struct in6_addr *local_addr, 1382 struct in6_addr *remote_addr, ifnet_t input_interface, u_int16_t pf_tag, 1383 necp_kernel_policy_id *return_policy_id, u_int32_t *return_route_rule_id, 1384 necp_kernel_policy_id *return_skip_policy_id, u_int32_t *return_pass_flags); 1385 extern void necp_socket_update_qos_marking(struct inpcb *inp, struct rtentry *route, u_int32_t route_rule_id); 1386 extern bool necp_lookup_current_qos_marking(int32_t *qos_marking_gencount, struct rtentry *route, struct ifnet *interface, u_int32_t route_rule_id, bool old_qos_marking); 1387 extern int necp_mark_packet_from_socket(struct mbuf *packet, struct inpcb *inp, necp_kernel_policy_id policy_id, 1388 u_int32_t route_rule_id, necp_kernel_policy_id skip_policy_id, u_int32_t pass_flags); 1389 extern necp_kernel_policy_id necp_get_policy_id_from_packet(struct mbuf *packet); 1390 extern necp_kernel_policy_id necp_get_skip_policy_id_from_packet(struct mbuf *packet); 1391 extern u_int16_t necp_get_packet_filter_tags_from_packet(struct mbuf *packet); 1392 extern bool necp_packet_should_skip_filters(struct mbuf *packet); 1393 extern u_int32_t necp_get_last_interface_index_from_packet(struct mbuf *packet); 1394 extern u_int32_t necp_get_route_rule_id_from_packet(struct mbuf *packet); 1395 extern int necp_get_app_uuid_from_packet(struct mbuf *packet, 1396 uuid_t app_uuid); 1397 1398 extern necp_kernel_policy_id necp_socket_find_policy_match(struct inpcb *inp, struct sockaddr *override_local_addr, 1399 struct sockaddr *override_remote_addr, u_int32_t override_bound_interface); 1400 extern necp_kernel_policy_id necp_ip_output_find_policy_match(struct mbuf *packet, int flags, struct ip_out_args *ipoa, 1401 struct rtentry *rt, 1402 necp_kernel_policy_result *result, 1403 necp_kernel_policy_result_parameter *result_parameter); 1404 extern necp_kernel_policy_id necp_ip6_output_find_policy_match(struct mbuf *packet, int flags, struct ip6_out_args *ip6oa, 1405 struct rtentry *rt, 1406 necp_kernel_policy_result *result, 1407 necp_kernel_policy_result_parameter *result_parameter); 1408 1409 extern int necp_mark_packet_from_ip(struct mbuf *packet, necp_kernel_policy_id policy_id); 1410 extern int necp_mark_packet_from_ip_with_skip(struct mbuf *packet, necp_kernel_policy_id policy_id, necp_kernel_policy_id skip_policy_id); 1411 extern int necp_mark_packet_from_interface(struct mbuf *packet, ifnet_t interface); 1412 1413 extern ifnet_t necp_get_ifnet_from_result_parameter(necp_kernel_policy_result_parameter *result_parameter); 1414 extern bool necp_packet_can_rebind_to_ifnet(struct mbuf *packet, struct ifnet *interface, struct route *new_route, int family); 1415 1416 extern bool necp_packet_is_allowed_over_interface(struct mbuf *packet, struct ifnet *interface); 1417 1418 extern int necp_mark_packet_as_keepalive(struct mbuf *packet, bool is_keepalive); 1419 extern bool necp_get_is_keepalive_from_packet(struct mbuf *packet); 1420 1421 extern int necp_sign_resolver_answer(uuid_t client_id, u_int32_t sign_type, 1422 u_int8_t *data, size_t data_length, 1423 u_int8_t *tag, size_t *out_tag_length); 1424 1425 extern bool necp_validate_resolver_answer(uuid_t client_id, u_int32_t sign_type, 1426 u_int8_t *data, size_t data_length, 1427 u_int8_t *tag, size_t tag_length); 1428 1429 extern void necp_update_all_clients(void); // Handle general re-evaluate event 1430 extern void necp_update_all_clients_immediately_if_needed(bool should_update_immediately); // Handle general re-evaluate event 1431 1432 extern void necp_force_update_client(uuid_t client_id, uuid_t remove_netagent_uuid, u_int32_t agent_generation); // Cause a single client to get an update event 1433 1434 extern bool necp_set_client_as_background(proc_t proc, struct fileproc *fp, bool background); // Set all clients for an fp as background or not 1435 1436 struct necp_fd_data; 1437 extern void necp_fd_memstatus(proc_t proc, uint32_t status, struct necp_fd_data *client_fd); // Purge memory of clients for the process 1438 extern void necp_fd_defunct(proc_t proc, struct necp_fd_data *client_fd); // Set all clients for an process as defunct 1439 1440 extern void necp_client_request_in_process_flow_divert(pid_t pid); 1441 1442 extern int necp_client_register_socket_flow(pid_t pid, uuid_t client_id, struct inpcb *inp); 1443 1444 extern int necp_client_register_socket_listener(pid_t pid, uuid_t client_id, struct inpcb *inp); 1445 1446 #if SKYWALK 1447 extern int necp_client_get_netns_flow_info(uuid_t client_id, struct ns_flow_info *flow_info); 1448 #endif /* SKYWALK */ 1449 1450 extern int necp_client_assert_bb_radio_manager(uuid_t client_id, bool assert); 1451 1452 extern int necp_client_assign_from_socket(pid_t pid, uuid_t client_id, struct inpcb *inp); 1453 1454 extern int necp_assign_client_result(uuid_t netagent_uuid, uuid_t client_id, 1455 u_int8_t *assigned_results, size_t assigned_results_length); 1456 extern int necp_assign_client_group_members(uuid_t netagent_uuid, uuid_t client_id, 1457 u_int8_t *assigned_group_members, size_t assigned_group_members_length); 1458 1459 struct skmem_obj_info; // forward declaration 1460 extern int necp_stats_ctor(struct skmem_obj_info *oi, struct skmem_obj_info *oim, void *arg, uint32_t skmflag); 1461 extern int necp_stats_dtor(void *addr, void *arg); 1462 1463 /* value to denote invalid flow advisory index */ 1464 struct netagent_session; 1465 extern int 1466 necp_update_flow_protoctl_event(uuid_t netagent_uuid, uuid_t client_id, 1467 uint32_t protoctl_event_code, uint32_t protoctl_event_val, 1468 uint32_t protoctl_event_tcp_seq_num); 1469 1470 #define NECP_FLOWADV_IDX_INVALID UINT32_MAX 1471 extern void *necp_create_nexus_assign_message(uuid_t nexus_instance, nexus_port_t nexus_port, void *key, uint32_t key_length, 1472 struct necp_client_endpoint *local_endpoint, struct necp_client_endpoint *remote_endpoint, 1473 struct ether_addr *local_ether_addr, 1474 u_int32_t flow_adv_index, void *flow_stats, size_t *message_length); 1475 1476 1477 #define NECP_MAX_DEMUX_PATTERNS 4 1478 struct necp_client_nexus_parameters { 1479 pid_t pid; 1480 pid_t epid; 1481 uuid_t euuid; 1482 #if SKYWALK 1483 netns_token port_reservation; 1484 #else /* !SKYWALK */ 1485 void *reserved; 1486 #endif /* !SKYWALK */ 1487 union necp_sockaddr_union local_addr; 1488 union necp_sockaddr_union remote_addr; 1489 u_int8_t ip_protocol; 1490 u_int8_t transport_protocol; 1491 u_int16_t ethertype; 1492 u_int32_t traffic_class; 1493 necp_policy_id policy_id; 1494 necp_policy_id skip_policy_id; 1495 unsigned is_listener:1; 1496 unsigned is_interpose:1; 1497 unsigned is_custom_ether:1; 1498 unsigned allow_qos_marking:1; 1499 unsigned override_address_selection:1; 1500 unsigned use_stable_address:1; // Used if override_address_selection is set 1501 unsigned no_wake_from_sleep:1; 1502 unsigned is_demuxable_parent:1; 1503 unsigned reuse_port:1; 1504 1505 uuid_t parent_flow_uuid; 1506 struct necp_demux_pattern demux_patterns[NECP_MAX_DEMUX_PATTERNS]; 1507 uint8_t demux_pattern_count; 1508 }; 1509 1510 struct necp_client_group_members { 1511 size_t group_members_length; 1512 u_int8_t *group_members; 1513 }; 1514 1515 struct necp_client_error_parameters { 1516 int32_t error; 1517 bool force_report; 1518 }; 1519 1520 struct necp_client_agent_parameters { 1521 union { 1522 struct necp_client_nexus_parameters nexus_request; 1523 u_int8_t close_token[QUIC_STATELESS_RESET_TOKEN_SIZE]; 1524 struct necp_client_group_members group_members; 1525 struct necp_client_error_parameters error; 1526 } u; 1527 }; 1528 1529 #define NECP_CLIENT_CBACTION_NONVIABLE 1 1530 #define NECP_CLIENT_CBACTION_VIABLE 2 1531 #define NECP_CLIENT_CBACTION_INITIAL 3 1532 1533 struct necp_client_add_flow_default { 1534 uuid_t agent_uuid; 1535 uuid_t registration_id; 1536 u_int16_t flags; // NECP_CLIENT_FLOW_FLAGS_* 1537 u_int16_t stats_request_count; 1538 struct necp_client_flow_stats stats_requests[1]; 1539 } __attribute__((__packed__)); 1540 1541 typedef void (*necp_client_flow_cb)(void *handle, int action, uint32_t interface_index, uint32_t necp_flags, bool *viable); 1542 1543 #if SKYWALK 1544 struct skmem_arena_mmap_info; 1545 1546 extern pid_t necp_client_get_proc_pid_from_arena_info(struct skmem_arena_mmap_info *arena_info); 1547 1548 extern void necp_client_early_close(uuid_t client_id); // Cause a single client to close stats, etc 1549 1550 #endif /* SKYWALK */ 1551 1552 #endif /* BSD_KERNEL_PRIVATE */ 1553 1554 #ifdef KERNEL 1555 #ifdef KERNEL_PRIVATE 1556 struct nstat_domain_info; 1557 extern void necp_copy_inp_domain_info(struct inpcb *, struct socket *, struct nstat_domain_info *); 1558 extern void necp_with_inp_domain_name(struct socket *so, void *ctx, void (*with_func)(char *domain_name, void *ctx)); 1559 extern bool net_domain_contains_hostname(char *hostname_string, char *domain_string); 1560 #endif /* KERNEL_PRIVATE */ 1561 #endif /* KERNEL */ 1562 1563 #ifndef KERNEL 1564 1565 extern int necp_match_policy(const uint8_t *parameters, size_t parameters_size, struct necp_aggregate_result *returned_result); 1566 1567 extern int necp_open(int flags); 1568 1569 extern int necp_client_action(int necp_fd, uint32_t action, uuid_t client_id, 1570 size_t client_id_len, uint8_t *buffer, size_t buffer_size); 1571 1572 extern int necp_session_open(int flags); 1573 1574 extern int necp_session_action(int necp_fd, uint32_t action, 1575 uint8_t *in_buffer, size_t in_buffer_length, 1576 uint8_t *out_buffer, size_t out_buffer_length); 1577 1578 #endif /* !KERNEL */ 1579 1580 #endif /* PRIVATE */ 1581 1582 #endif 1583