1 /* 2 * Copyright (c) 2016-2022 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 _SKYWALK_OS_PACKET_H_ 30 #define _SKYWALK_OS_PACKET_H_ 31 32 #ifdef PRIVATE 33 34 #include <stdint.h> 35 #include <sys/types.h> 36 #include <sys/cdefs.h> 37 #include <uuid/uuid.h> 38 #include <mach/boolean.h> 39 #include <mach/vm_types.h> 40 #include <skywalk/os_nexus.h> 41 42 /* 43 * @enum packet_svc_class_t 44 * @abstract Service class of a packet 45 * @discussion Property that represents the category of service 46 * of a packet. This information may be used by the driver 47 * and at the link level. 48 * @constant PKT_SC_BK_SYS "Background System-Initiated", high delay 49 * tolerant, high loss tolerant, elastic flow, variable size & 50 * long-lived. 51 * @constant PKT_SC_BK "Background", user-initiated, high delay tolerant, 52 * high loss tolerant, elastic flow, variable size. This level 53 * corresponds to WMM access class "BG". 54 * @constant PKT_SC_BE "Best Effort", unclassified/standard. This is 55 * the default service class; pretty much a mix of everything. 56 * This level corresponds to WMM access class "BE". 57 * @constant PKT_SC_RD 58 * "Responsive Data", a notch higher than "Best Effort", medium 59 * delay tolerant, medium loss tolerant, elastic flow, bursty, 60 * long-lived. 61 * @constant PKT_SC_OAM "Operations, Administration, and Management", 62 * medium delay tolerant, low-medium loss tolerant, elastic & 63 * inelastic flows, variable size. 64 * @constant PKT_SC_AV "Multimedia Audio/Video Streaming", medium delay 65 * tolerant, low-medium loss tolerant, elastic flow, constant 66 * packet interval, variable rate & size. 67 * @constant PKT_SC_RV "Responsive Multimedia Audio/Video", low delay 68 * tolerant, low-medium loss tolerant, elastic flow, variable 69 * packet interval, rate and size. 70 * @constant PKT_SC_VI "Interactive Video", low delay tolerant, low- 71 * medium loss tolerant, elastic flow, constant packet interval, 72 * variable rate & size. This level corresponds to WMM access 73 * class "VI". 74 * @constant PKT_SC_SIG "Signaling", low delay tolerant, low loss 75 * tolerant, inelastic flow, jitter tolerant, rate is bursty but 76 * short, variable size. e.g. SIP. This level corresponds to WMM 77 * access class "VI". 78 * @constant PKT_SC_VO "Interactive Voice", low delay tolerant, low loss 79 * tolerant, inelastic flow, constant packet rate, somewhat fixed 80 * size. This level corresponds to WMM access class "VO" or 81 * PKT_TC_VO. 82 * @constant PKT_SC_CTL "Network Control", low delay tolerant, low loss 83 * tolerant, inelastic flow, rate is short & burst, variable size. 84 */ 85 typedef enum { 86 PKT_SC_BK_SYS = 0x00080090, /* lowest class */ 87 PKT_SC_BK = 0x00100080, 88 89 PKT_SC_BE = 0x00000000, 90 PKT_SC_RD = 0x00180010, 91 PKT_SC_OAM = 0x00200020, 92 93 PKT_SC_AV = 0x00280120, 94 PKT_SC_RV = 0x00300110, 95 PKT_SC_VI = 0x00380100, 96 PKT_SC_SIG = 0x00380130, 97 98 PKT_SC_VO = 0x00400180, 99 PKT_SC_CTL = 0x00480190, /* highest class */ 100 } packet_svc_class_t; 101 102 /* CSTYLED */ 103 /*! 104 * @enum packet_traffic_class_t 105 * @abstract Traffic class of a packet 106 * @discussion Property that represent the category of traffic of a packet. 107 * This information may be used by the driver and at the link level. 108 * @constant PKT_TC_BE Best effort, normal class. 109 * @constant PKT_TC_BK Background, low priority or bulk traffic. 110 * @constant PKT_TC_VI Interactive video, constant bit rate, low latency. 111 * @constant PKT_TC_VO Interactive voice, constant bit rate, lowest latency. 112 */ 113 typedef enum { 114 PKT_TC_BE = 0, 115 PKT_TC_BK = 1, 116 PKT_TC_VI = 2, 117 PKT_TC_VO = 3, 118 } packet_traffic_class_t; 119 120 /* 121 * These conversion macros rely on the corresponding PKT_SC and 122 * PKT_TC values in order to establish the following mapping: 123 * 124 * PKT_SC_BK_SYS ] ==> PKT_TC_BK 125 * PKT_SC_BK ] 126 * 127 * PKT_SC_BE ] ==> PKT_TC_BE 128 * PKT_SC_RD ] 129 * PKT_SC_OAM ] 130 * 131 * PKT_SC_AV ] ==> PKT_TC_VI 132 * PKT_SC_RV ] 133 * PKT_SC_VI ] 134 * PKT_SC_SIG ] 135 * 136 * PKT_SC_VO ] ==> PKT_TC_VO 137 * PKT_SC_CTL ] 138 * 139 * The values assigned to each service class allows for a fast mapping to 140 * the corresponding PKT_TC traffic class values, as well as to retrieve the 141 * assigned index; therefore care must be taken when comparing against these 142 * values. Use the corresponding class and index macros to retrieve the 143 * corresponding portion, and never assume that a higher class corresponds 144 * to a higher index. 145 */ 146 #define PKT_SCVAL(x) ((x) & 0xffff) 147 #define PKT_SC2TC(_sc) (PKT_SCVAL(_sc) >> 7) 148 #define PKT_TC2SCVAL(_tc) ((_tc) << 7) 149 150 #define PKT_SCVAL_BK_SYS PKT_SCVAL(PKT_SC_BK_SYS) 151 #define PKT_SCVAL_BK PKT_SCVAL(PKT_SC_BK) 152 #define PKT_SCVAL_BE PKT_SCVAL(PKT_SC_BE) 153 #define PKT_SCVAL_RD PKT_SCVAL(PKT_SC_RD) 154 #define PKT_SCVAL_OAM PKT_SCVAL(PKT_SC_OAM) 155 #define PKT_SCVAL_AV PKT_SCVAL(PKT_SC_AV) 156 #define PKT_SCVAL_RV PKT_SCVAL(PKT_SC_RV) 157 #define PKT_SCVAL_VI PKT_SCVAL(PKT_SC_VI) 158 #define PKT_SCVAL_SIG PKT_SCVAL(PKT_SC_SIG) 159 #define PKT_SCVAL_VO PKT_SCVAL(PKT_SC_VO) 160 #define PKT_SCVAL_CTL PKT_SCVAL(PKT_SC_CTL) 161 162 /* 163 * Packet checksum offload flags. 164 */ 165 typedef uint32_t packet_csum_flags_t; 166 typedef uint32_t packet_trace_id_t; 167 typedef uint32_t packet_flowid_t; 168 typedef uint16_t packet_trace_tag_t; 169 170 /* 171 * PACKET_CSUM_PARTIAL indicates the following: 172 * 173 * On transmit, the start and stuff offsets are significant, and that the 174 * module setting this information is requesting that the layer below it 175 * compute 16-bit 1's complement sum from the location marked by the start 176 * offset to the end of the packet, and store the resulted sum at the 177 * location marked by the stuff offset. If PACKET_CSUM_ZERO_INVERT is set, 178 * and if the resulted sum is 0, it will be converted to -0 (0xffff). 179 * 180 * On receive, the start offset and checksum value are significant, and 181 * that the module computing the 16-bit 1's complement and setting this 182 * information is requesting that the layer above it perform any necessary 183 * adjustments to exclude/include data span that's not applicable, as well 184 * as to validate the checksum value. 185 */ 186 #define PACKET_CSUM_PARTIAL 0x01 /* partial one's complement */ 187 #define PACKET_CSUM_ZERO_INVERT 0x02 /* invert resulted 0 to 0xffff */ 188 189 /* 190 * Below flags are for RX. 191 */ 192 #define PACKET_CSUM_IP_CHECKED 0x0100 /* did IP checksum */ 193 #define PACKET_CSUM_IP_VALID 0x0200 /* and the IP checksum is valid */ 194 #define PACKET_CSUM_DATA_VALID 0x0400 /* csum_rx_val is valid */ 195 #define PACKET_CSUM_PSEUDO_HDR 0x0800 /* csum_rx_val includes pseudo hdr */ 196 197 typedef enum : uint32_t { 198 PACKET_TSO_IPV4 = 0x00100000, 199 PACKET_TSO_IPV6 = 0x00200000, 200 } packet_tso_flags_t; 201 202 #define PACKET_HAS_VALID_IP_CSUM(_p) \ 203 (((_p)->pkt_csum_flags & (PACKET_CSUM_IP_CHECKED | PACKET_CSUM_IP_VALID)) \ 204 == (PACKET_CSUM_IP_CHECKED | PACKET_CSUM_IP_VALID)) 205 206 #define PACKET_HAS_PARTIAL_CHECKSUM(_p) \ 207 ((_p)->pkt_csum_flags & (PACKET_CSUM_PARTIAL)) 208 209 #define PACKET_CSUM_RX_FULL_FLAGS \ 210 (PACKET_CSUM_IP_CHECKED | PACKET_CSUM_IP_VALID | \ 211 PACKET_CSUM_DATA_VALID | PACKET_CSUM_PSEUDO_HDR) 212 213 #define PACKET_CSUM_RX_FLAGS \ 214 (PACKET_CSUM_RX_FULL_FLAGS | PACKET_CSUM_PARTIAL) 215 216 #define PACKET_CSUM_TSO_FLAGS \ 217 (PACKET_TSO_IPV4 | PACKET_TSO_IPV6) 218 219 #define PACKET_HAS_FULL_CHECKSUM_FLAGS(_p) \ 220 (((_p)->pkt_csum_flags & PACKET_CSUM_RX_FULL_FLAGS) == PACKET_CSUM_RX_FULL_FLAGS) 221 222 /* 223 * TODO: [email protected] -- these are temporary and should be removed later. 224 */ 225 #define OS_PACKET_HAS_CHECKSUM_API 1 226 #define OS_PACKET_HAS_SEGMENT_COUNT 1 227 #define OS_PACKET_HAS_TRACING_API 1 228 #define OS_PACKET_HAS_SEGMENT_SIZE 1 229 230 /* 231 * Valid values for pkt_aggr_type. 232 */ 233 #define PKT_AGGR_NONE 0x00 /* no aggregation */ 234 #define PKT_AGGR_IP_CHAIN 0x01 /* buflet chain of discrete IP packets containing contiguous L4 frames */ 235 #define PKT_AGGR_SINGLE_IP 0x02 /* buflet chain representing single IP packet */ 236 #define PKT_AGGR_SINGLE_IP_PACKED 0x03 /* buflet chain representing single IP packet in packed format */ 237 238 /* 239 * packet_id is a per packet metadata which can be set on a packet by the 240 * application. It can be used to identify either an individual or a group 241 * of packets within the networking stack and driver. 242 */ 243 typedef struct packet_id { 244 /* 245 * version of this structure. 246 */ 247 uint8_t pktid_version; 248 #define OS_PACKET_PKTID_VERSION_1 1 249 #define OS_PACKET_PKTID_VERSION_CURRENT OS_PACKET_PKTID_VERSION_1 250 /* 251 * payload type of the packet, opaque to the network stack. 252 */ 253 uint8_t pktid_payload_type; 254 /* 255 * packet sequence number, monotonically increasing. 256 */ 257 uint16_t pktid_sequence_number; 258 /* 259 * packet timestamp, monotonically increasing and opaque to the 260 * network stack. Sample rate of the timestamp clock is determined 261 * by the application. 262 */ 263 uint32_t pktid_timestamp; 264 /* 265 * Identifier for streams defined by the application. 266 */ 267 uint32_t pktid_stream_identifier; 268 /* 269 * reserved for future use. 270 */ 271 uint32_t _reserved; 272 } packet_id_t; 273 274 /* 275 * Packet Trace code 276 * Used with os_packet_trace_* functions. 277 * Total of 12bit (0xABC) code space available, current sub-code allocation is: 278 * 0x00C code space for FSW Rx path. 279 * 0x01C code space for FSW Tx path. 280 * 281 * More sub-code can be added for other packet data path, e.g. uPipe, BSD, etc. 282 * 283 * Note: 284 * 1. Needs to include <sys/kdebug.h> to use the values. 285 * 2. When making changes to sub-code/value, update static assertions in 286 * pp_init and probe list ariadne-plists/skywalk-tracepoints.plist. 287 * 288 */ 289 /* Rx Group */ 290 #define PKT_TRACE_RX_DRV_START (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x001) | DBG_FUNC_START) 291 #define PKT_TRACE_RX_DRV_END (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x001) | DBG_FUNC_END) 292 293 #define PKT_TRACE_RX_FSW_START (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x002) | DBG_FUNC_START) 294 #define PKT_TRACE_RX_FSW_END (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x002) | DBG_FUNC_END) 295 296 #define PKT_TRACE_RX_CHN_START (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x003) | DBG_FUNC_START) 297 #define PKT_TRACE_RX_CHN_END (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x003) | DBG_FUNC_END) 298 299 300 /* Tx Group */ 301 #define PKT_TRACE_TX_FSW_START (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x010) | DBG_FUNC_START) 302 #define PKT_TRACE_TX_FSW_END (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x010) | DBG_FUNC_END) 303 304 #define PKT_TRACE_TX_AQM_START (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x011) | DBG_FUNC_START) 305 #define PKT_TRACE_TX_AQM_END (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x011) | DBG_FUNC_END) 306 307 #define PKT_TRACE_TX_DRV_START (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x012) | DBG_FUNC_START) 308 #define PKT_TRACE_TX_DRV_END (SKYWALKDBG_CODE(DBG_SKYWALK_PACKET, 0x012) | DBG_FUNC_END) 309 310 /* 311 * @enum packet_expiry_action_t 312 * @abstract The desired action(s) to take upon the expiration of the packet 313 * @discussion Bitfield property to express the desired actions to take when the packet expires. 314 * At the moment the actions are only taken for the TX packets. 315 * 316 * @constant PACKET_EXPIRY_ACTION_DROP - drop the packet 317 * @constant PACKET_EXPIRY_ACTION_NOTIFY - notify the upper layers 318 */ 319 typedef enum { 320 PACKET_EXPIRY_ACTION_NONE = 0x0, 321 PACKET_EXPIRY_ACTION_DROP = 0x1, 322 PACKET_EXPIRY_ACTION_NOTIFY = 0x2, 323 } packet_expiry_action_t; 324 325 /* 326 * @enum packet_app_metadata_type_t 327 * @abstract Application specific metadata which can be used by the Network 328 * Stack or Network Interface Driver/firmware. 329 * @discussion Supported Application types are: 330 * @constant PACKET_APP_METADATA_TYPE_VOICE - voice application 331 */ 332 typedef enum : uint8_t { 333 #if defined(LIBSYSCALL_INTERFACE) || defined(BSD_KERNEL_PRIVATE) 334 PACKET_APP_METADATA_TYPE_UNSPECIFIED = 0, 335 #endif /* LIBSYSCALL_INTERFACE || BSD_KERNEL_PRIVATE */ 336 PACKET_APP_METADATA_TYPE_VOICE = 1, 337 #if defined(LIBSYSCALL_INTERFACE) || defined(BSD_KERNEL_PRIVATE) 338 PACKET_APP_METADATA_TYPE_MIN = PACKET_APP_METADATA_TYPE_VOICE, 339 PACKET_APP_METADATA_TYPE_MAX = PACKET_APP_METADATA_TYPE_VOICE, 340 #endif /* LIBSYSCALL_INTERFACE || BSD_KERNEL_PRIVATE */ 341 } packet_app_metadata_type_t; 342 343 /* 344 * @enum packet_voice_app_metadata_t 345 * @abstract Voice application specific metadata. 346 * @discussion Supported Voice application metadata values are: 347 * @constant PACKET_VOICE_APP_METADATA_UNSPECIFIED - metadata not specified. 348 * @constant PACKET_VOICE_APP_METADATA_SPEECH - speech frame. 349 * @constant PACKET_VOICE_APP_METADATA_SILENCE - silence frame. 350 * @constant PACKET_VOICE_APP_METADATA_OTHER - RTCP XR, RTCP, or DTMF. 351 */ 352 typedef enum : uint8_t { 353 PACKET_VOICE_APP_METADATA_UNSPECIFIED = 0x0, 354 PACKET_VOICE_APP_METADATA_SPEECH = 0x1, 355 PACKET_VOICE_APP_METADATA_SILENCE = 0x2, 356 PACKET_VOICE_APP_METADATA_OTHER = 0x3, 357 } packet_voice_app_metadata_t; 358 359 #ifndef KERNEL 360 /* 361 * User APIs. 362 */ 363 364 /* 365 * Opaque handles. 366 */ 367 struct __user_buflet; 368 typedef uint64_t packet_t; 369 typedef struct __user_buflet *buflet_t; 370 371 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) 372 __BEGIN_DECLS 373 /* 374 * Packets specific. 375 */ 376 extern int os_packet_set_headroom(const packet_t, const uint8_t); 377 extern uint8_t os_packet_get_headroom(const packet_t); 378 extern int os_packet_set_link_header_length(const packet_t, const uint8_t); 379 extern uint8_t os_packet_get_link_header_length(const packet_t); 380 extern int os_packet_set_link_broadcast(const packet_t); 381 extern boolean_t os_packet_get_link_broadcast(const packet_t); 382 extern int os_packet_set_link_multicast(const packet_t); 383 extern boolean_t os_packet_get_link_multicast(const packet_t); 384 extern int os_packet_set_link_ethfcs(const packet_t); 385 extern boolean_t os_packet_get_link_ethfcs(const packet_t); 386 extern int os_packet_set_transport_traffic_background(const packet_t); 387 extern boolean_t os_packet_get_transport_traffic_background(const packet_t); 388 extern int os_packet_set_transport_traffic_realtime(const packet_t); 389 extern boolean_t os_packet_get_transport_traffic_realtime(const packet_t); 390 extern int os_packet_set_transport_retransmit(const packet_t); 391 extern boolean_t os_packet_get_transport_retransmit(const packet_t); 392 extern int os_packet_set_transport_last_packet(const packet_t); 393 extern int os_packet_set_service_class(const packet_t, 394 const packet_svc_class_t); 395 extern packet_svc_class_t os_packet_get_service_class(const packet_t); 396 extern int os_packet_set_compression_generation_count(const packet_t, const uint32_t); 397 extern int os_packet_get_compression_generation_count(const packet_t, uint32_t *); 398 extern int os_packet_set_traffic_class(const packet_t, packet_traffic_class_t); 399 extern packet_traffic_class_t os_packet_get_traffic_class(const packet_t); 400 extern int os_packet_set_inet_checksum(const packet_t, 401 const packet_csum_flags_t, const uint16_t, const uint16_t); 402 extern packet_csum_flags_t os_packet_get_inet_checksum(const packet_t, 403 uint16_t *, uint16_t *); 404 extern void os_packet_set_group_start(const packet_t); 405 extern boolean_t os_packet_get_group_start(const packet_t); 406 extern void os_packet_set_group_end(const packet_t); 407 extern boolean_t os_packet_get_group_end(const packet_t); 408 extern int os_packet_set_expire_time(const packet_t, const uint64_t); 409 extern int os_packet_get_expire_time(const packet_t, uint64_t *); 410 #define HAS_OS_PACKET_EXPIRY_ACTION 1 411 extern int os_packet_set_expiry_action(const packet_t, const packet_expiry_action_t); 412 extern int os_packet_get_expiry_action(const packet_t, packet_expiry_action_t *); 413 extern int os_packet_set_token(const packet_t, const void *, const uint16_t); 414 extern int os_packet_get_packetid(const packet_t, packet_id_t *); 415 extern int os_packet_set_packetid(const packet_t, packet_id_t *); 416 extern int os_packet_set_vlan_tag(const packet_t, const uint16_t, 417 const boolean_t); 418 extern int os_packet_get_vlan_tag(const packet_t, uint16_t *, boolean_t *); 419 extern uint16_t os_packet_get_vlan_id(const uint16_t); 420 extern uint8_t os_packet_get_vlan_priority(const uint16_t); 421 #define HAS_OS_PACKET_GET_WAKE_FLAG 1 422 extern boolean_t os_packet_get_wake_flag(const packet_t); 423 #define HAS_OS_PACKET_KEEP_ALIVE 1 424 extern boolean_t os_packet_get_keep_alive(const packet_t); 425 extern void os_packet_set_keep_alive(const packet_t, const boolean_t); 426 extern boolean_t os_packet_get_truncated(const packet_t); 427 extern uint8_t os_packet_get_aggregation_type(const packet_t); 428 extern int os_packet_set_app_metadata(const packet_t, 429 const packet_app_metadata_type_t, const uint8_t); 430 extern int os_packet_set_protocol_segment_size(const packet_t, const uint16_t); 431 extern void os_packet_set_tso_flags(const packet_t, packet_tso_flags_t); 432 extern void os_packet_set_l4s_flag(const packet_t, const boolean_t); 433 /* 434 * Quantum & Packets. 435 */ 436 extern void os_packet_set_flow_uuid(const packet_t, const uuid_t flow_uuid); 437 extern void os_packet_get_flow_uuid(const packet_t, uuid_t *flow_uuid); 438 extern void os_packet_clear_flow_uuid(const packet_t); 439 extern uint32_t os_packet_get_data_length(const packet_t); 440 extern uint32_t os_packet_get_buflet_count(const packet_t); 441 extern buflet_t os_packet_get_next_buflet(const packet_t, const buflet_t); 442 extern uint32_t os_packet_get_segment_count(const packet_t ph); 443 extern int os_packet_finalize(const packet_t); 444 extern int os_packet_add_buflet(const packet_t ph, const buflet_t bprev, 445 const buflet_t bnew); 446 /* increment use count on packet */ 447 extern int os_packet_increment_use_count(const packet_t ph); 448 /* decrement use count on packet and retrieve new value */ 449 extern int os_packet_decrement_use_count(const packet_t ph, uint16_t *use_cnt); 450 451 extern packet_trace_id_t os_packet_get_trace_id(const packet_t ph); 452 extern void os_packet_set_trace_id(const packet_t ph, packet_trace_id_t); 453 extern void os_packet_trace_event(const packet_t ph, uint32_t); 454 455 /* 456 * Misc. 457 */ 458 extern uint32_t os_inet_checksum(const void *, uint32_t, uint32_t); 459 extern uint32_t os_copy_and_inet_checksum(const void *, void *, 460 uint32_t, uint32_t); 461 462 /* 463 * Buflets. 464 */ 465 extern int os_buflet_set_data_offset(const buflet_t, const uint16_t); 466 extern uint16_t os_buflet_get_data_offset(const buflet_t); 467 extern int os_buflet_set_data_length(const buflet_t, const uint16_t); 468 extern uint16_t os_buflet_get_data_length(const buflet_t); 469 extern void *os_buflet_get_object_address(const buflet_t); 470 extern uint32_t os_buflet_get_object_limit(const buflet_t); 471 extern void *os_buflet_get_data_address(const buflet_t); 472 extern uint16_t os_buflet_get_data_limit(const buflet_t); 473 extern uint16_t os_buflet_get_object_offset(const buflet_t); 474 extern uint16_t os_buflet_get_gro_len(const buflet_t); 475 extern void *os_buflet_get_next_buf(const buflet_t, const void *); 476 __END_DECLS 477 #endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */ 478 #else /* KERNEL */ 479 /* 480 * Kernel APIs. 481 */ 482 483 /* 484 * Opaque handles. 485 */ 486 struct __kern_buflet; 487 struct kern_pbufpool; 488 struct sksegment; 489 490 typedef struct kern_pbufpool *kern_pbufpool_t; 491 typedef uint64_t kern_packet_t; 492 typedef uint32_t kern_packet_idx_t; 493 typedef struct __kern_buflet *kern_buflet_t; 494 typedef uint32_t kern_obj_idx_seg_t; 495 typedef struct sksegment *kern_segment_t; 496 typedef uint32_t kern_segment_idx_t; 497 498 /* 499 * @typedef pbuf_seg_ctor_fn_t 500 * @abstract Buffer segment constructor callback. 501 * @param buf_seg Buffer segment handle. 502 * @param buf_desc IOSKMemoryDescriptor handle for buffer segment. 503 * @discussion This callback is invoked when a segment has been activated. 504 * If applicable, the owner should wire/prepare the memory and insert 505 * it into the memory mapper (IOMMU/DART) prior to returning. 506 */ 507 typedef void (*pbuf_seg_ctor_fn_t)(const kern_pbufpool_t, 508 const kern_segment_t buf_seg, const IOSKMemoryDescriptor buf_desc); 509 510 /* 511 * @typedef pbuf_seg_dtor_fn_t 512 * @abstract Buffer segment destructor callback. 513 * @param buf_seg Buffer segment handle. 514 * @param buf_desc IOSKMemoryDescriptor handle for buffer segment. 515 * @discussion This callback is invoked when a segment is about to be 516 * freed. The owner should reverse what had been done earlier 517 * at pbuf_seg_ctor_fn_t() constructor time. If applicable, 518 * it should remove the memory from mapper (IOMMU/DART), and 519 * unwire/complete it prior to returning. 520 */ 521 typedef void (*pbuf_seg_dtor_fn_t)(const kern_pbufpool_t, 522 const kern_segment_t buf_seg, const IOSKMemoryDescriptor buf_desc); 523 524 typedef void (*pbuf_ctx_retain_fn_t)(void *const ctx); 525 typedef void (*pbuf_ctx_release_fn_t)(void *const ctx); 526 527 typedef uint8_t pbufpool_name_t[64]; 528 529 /* 530 * Kernel packet buffer pool init. 531 */ 532 struct kern_pbufpool_init { 533 uint32_t kbi_version; /* current version */ 534 pbufpool_name_t kbi_name; /* optional */ 535 uint32_t kbi_flags; /* see KBI_* */ 536 uint32_t kbi_packets; /* required */ 537 uint32_t kbi_max_frags; /* max buflets per packet */ 538 uint32_t kbi_buflets; /* >= packets (optional) */ 539 uint32_t kbi_bufsize; /* required */ 540 uint32_t kbi_buf_seg_size; /* optional */ 541 pbuf_seg_ctor_fn_t kbi_buf_seg_ctor; /* optional */ 542 pbuf_seg_dtor_fn_t kbi_buf_seg_dtor; /* optional */ 543 void * kbi_ctx; /* optional */ 544 pbuf_ctx_retain_fn_t kbi_ctx_retain; /* optional */ 545 pbuf_ctx_release_fn_t kbi_ctx_release; /* optional */ 546 }; 547 548 #define KBIF_QUANTUM 0x1 /* simple packet (non-networking) */ 549 #define KBIF_PERSISTENT 0x2 /* persistent memory (wired) */ 550 #define KBIF_MONOLITHIC 0x4 /* single segment mode */ 551 #define KBIF_BUFFER_ON_DEMAND 0x8 /* attach/detach buffers on demand */ 552 #define KBIF_INHIBIT_CACHE 0x10 /* caching-inhibited */ 553 #define KBIF_USER_ACCESS 0x20 /* allow userspace access */ 554 #define KBIF_VIRTUAL_DEVICE 0x40 /* device is virtual (no DMA) */ 555 #define KBIF_PHYS_CONTIGUOUS 0x80 /* physically-contiguous segment(s) */ 556 #define KBIF_IODIR_IN 0x100 /* io direction in (device to host) */ 557 #define KBIF_IODIR_OUT 0x200 /* io direction out (host to device) */ 558 #define KBIF_KERNEL_READONLY 0x400 /* kernel read-only */ 559 #define KBIF_NO_MAGAZINES 0x800 /* disable per-CPU magazines layer */ 560 #define KBIF_RAW_BFLT 0x1000 /* configure raw buflet */ 561 #define KBIF_THREADSAFE 0x2000 /* thread safe memory descriptor */ 562 563 #define KERN_PBUFPOOL_VERSION_1 1 564 #define KERN_PBUFPOOL_VERSION_2 2 /* added ctx retain/release */ 565 #define KERN_PBUFPOOL_CURRENT_VERSION KERN_PBUFPOOL_VERSION_2 566 567 /* 568 * Kernel packet buffer pool memory info. 569 */ 570 struct kern_pbufpool_memory_info { 571 uint32_t kpm_flags; /* see KPMF_* */ 572 uint32_t kpm_packets; /* number of packets */ 573 uint32_t kpm_max_frags; /* max buflets per packet */ 574 uint32_t kpm_buflets; /* number of buflets */ 575 uint32_t kpm_bufsize; /* size of each buffer */ 576 uint32_t kpm_bufsegs; /* number of buffer segments */ 577 uint32_t kpm_buf_seg_size; /* size of a buffer segment */ 578 uint32_t kpm_buf_obj_size; /* size of the shared buffer object */ 579 } __attribute__((aligned(64))); 580 581 #define KPMF_EXTERNAL 0x1 /* externally configured */ 582 583 /* 584 * Kernel packet representation of packet_svc_class_t. 585 * 586 * We have a separate enum to separate the namespace just in case we need it. 587 */ 588 typedef enum { 589 #ifdef BSD_KERNEL_PRIVATE 590 KPKT_SC_UNSPEC = -1, /* Internal: not specified */ 591 #endif /* BSD_KERNEL_PRIVATE */ 592 KPKT_SC_BK_SYS = PKT_SC_BK_SYS, /* lowest class */ 593 KPKT_SC_BK = PKT_SC_BK, 594 595 KPKT_SC_BE = PKT_SC_BE, 596 KPKT_SC_RD = PKT_SC_RD, 597 KPKT_SC_OAM = PKT_SC_OAM, 598 599 KPKT_SC_AV = PKT_SC_AV, 600 KPKT_SC_RV = PKT_SC_RV, 601 KPKT_SC_VI = PKT_SC_VI, 602 KPKT_SC_SIG = PKT_SC_SIG, 603 604 KPKT_SC_VO = PKT_SC_VO, 605 KPKT_SC_CTL = PKT_SC_CTL, /* highest class */ 606 } kern_packet_svc_class_t; 607 608 /* Maximum number of KPKT_SC values (excluding KPKT_SC_UNSPEC) */ 609 #define KPKT_SC_MAX_CLASSES 10 610 611 #define KPKT_VALID_SVC(c) \ 612 (c == KPKT_SC_BK_SYS || c == KPKT_SC_BK || c == KPKT_SC_BE || \ 613 c == KPKT_SC_RD || c == KPKT_SC_OAM || c == KPKT_SC_AV || \ 614 c == KPKT_SC_RV || c == KPKT_SC_VI || c == KPKT_SC_SIG || \ 615 c == KPKT_SC_VO || c == KPKT_SC_CTL) 616 617 #define KPKT_SVCIDX(c) ((((c) >> 16) & 0xff) >> 3) 618 619 /* 620 * Kernel packet representation of packet_traffic_class_t. 621 * 622 * We have a separate enum to separate the namespace just in case we need it. 623 */ 624 typedef enum { 625 #ifdef BSD_KERNEL_PRIVATE 626 KPKT_TC_UNSPEC = -1, /* Internal: not specified */ 627 #endif /* BSD_KERNEL_PRIVATE */ 628 KPKT_TC_BE = PKT_TC_BE, 629 KPKT_TC_BK = PKT_TC_BK, 630 KPKT_TC_VI = PKT_TC_VI, 631 KPKT_TC_VO = PKT_TC_VO, 632 #ifdef BSD_KERNEL_PRIVATE 633 KPKT_TC_MAX = 4, /* Internal: traffic class count */ 634 #endif /* BSD_KERNEL_PRIVATE */ 635 } kern_packet_traffic_class_t; 636 637 /* 638 * Modes for cloning a kernel packet. 639 * 640 * The "heavy" mode copies most of the metadata (except those pertaining 641 * to linkages to other objects), allocates new buffer(s) for the 642 * cloned packet, and copies old buffer(s) to new one(s). 643 * 644 * The "light" mode is to be used on a packet that's recently allocated, 645 * as the cloning process involves copying minimal metadata information, 646 * as well as adding reference(s) to the buffer(s) rather than copying. 647 */ 648 typedef enum { 649 KPKT_COPY_HEAVY = 0, /* copy everything including buffers */ 650 KPKT_COPY_LIGHT /* minimal copy, adding refs to buffers */ 651 } kern_packet_copy_mode_t; 652 653 654 __BEGIN_DECLS 655 /* 656 * Packets specific. 657 */ 658 extern errno_t kern_packet_set_headroom(const kern_packet_t, const uint8_t); 659 extern uint8_t kern_packet_get_headroom(const kern_packet_t); 660 /* deprecated -- use kern_packet_set_headroom instead */ 661 extern errno_t kern_packet_set_link_header_offset(const kern_packet_t, 662 const uint8_t); 663 /* deprecated -- use kern_packet_get_headroom instead */ 664 extern uint16_t kern_packet_get_link_header_offset(const kern_packet_t); 665 extern errno_t kern_packet_set_link_header_length(const kern_packet_t, 666 const uint8_t); 667 extern uint8_t kern_packet_get_link_header_length(const kern_packet_t); 668 extern errno_t kern_packet_set_link_broadcast(const kern_packet_t); 669 extern boolean_t kern_packet_get_link_broadcast(const kern_packet_t); 670 extern errno_t kern_packet_set_link_multicast(const kern_packet_t); 671 extern boolean_t kern_packet_get_link_multicast(const kern_packet_t); 672 extern errno_t kern_packet_set_link_ethfcs(const kern_packet_t); 673 extern boolean_t kern_packet_get_link_ethfcs(const kern_packet_t); 674 /* deprecated -- use kern_packet_set_link_header_length instead */ 675 extern errno_t kern_packet_set_network_header_offset(const kern_packet_t, 676 const uint16_t); 677 /* deprecated -- use kern_packet_get_link_header_length instead */ 678 extern uint16_t kern_packet_get_network_header_offset(const kern_packet_t); 679 extern errno_t kern_packet_set_transport_traffic_background( 680 const kern_packet_t); 681 extern boolean_t kern_packet_get_transport_traffic_background( 682 const kern_packet_t); 683 extern errno_t kern_packet_set_transport_traffic_realtime(const kern_packet_t); 684 extern boolean_t kern_packet_get_transport_traffic_realtime( 685 const kern_packet_t); 686 /* deprecated */ 687 extern errno_t kern_packet_set_transport_header_offset(const kern_packet_t, 688 const uint16_t); 689 /* deprecated */ 690 extern uint16_t kern_packet_get_transport_header_offset(const kern_packet_t); 691 extern errno_t kern_packet_set_transport_retransmit(const kern_packet_t); 692 extern boolean_t kern_packet_get_transport_retransmit(const kern_packet_t); 693 extern boolean_t kern_packet_get_transport_new_flow(const kern_packet_t); 694 extern boolean_t kern_packet_get_transport_last_packet(const kern_packet_t); 695 extern errno_t kern_packet_set_service_class(const kern_packet_t, 696 const kern_packet_svc_class_t); 697 extern kern_packet_svc_class_t kern_packet_get_service_class( 698 const kern_packet_t); 699 extern errno_t kern_packet_get_service_class_index( 700 const kern_packet_svc_class_t, uint32_t *); 701 #define HAS_KERN_PACKET_COMPRESSION_GENERATION_COUNT 1 702 extern errno_t kern_packet_set_compression_generation_count(const kern_packet_t, 703 const uint32_t); 704 extern errno_t kern_packet_get_compression_generation_count(const kern_packet_t, uint32_t *); 705 extern boolean_t kern_packet_is_high_priority( 706 const kern_packet_t); 707 extern errno_t kern_packet_set_traffic_class(const kern_packet_t, 708 kern_packet_traffic_class_t); 709 extern kern_packet_traffic_class_t kern_packet_get_traffic_class( 710 const kern_packet_t); 711 extern errno_t kern_packet_set_inet_checksum(const kern_packet_t, 712 const packet_csum_flags_t, const uint16_t, const uint16_t, boolean_t); 713 extern packet_csum_flags_t kern_packet_get_inet_checksum(const kern_packet_t, 714 uint16_t *, uint16_t *, boolean_t); 715 extern errno_t kern_packet_get_timestamp(const kern_packet_t, uint64_t *, 716 boolean_t *); 717 extern errno_t kern_packet_set_timestamp(const kern_packet_t, uint64_t, 718 boolean_t); 719 extern errno_t kern_packet_get_timestamp_requested(const kern_packet_t, 720 boolean_t *); 721 extern errno_t kern_packet_get_tx_completion_status(const kern_packet_t, 722 kern_return_t *); 723 extern errno_t kern_packet_set_tx_completion_status(const kern_packet_t, 724 kern_return_t); 725 extern void kern_packet_tx_completion(const kern_packet_t, ifnet_t); 726 extern void kern_packet_set_group_start(const kern_packet_t); 727 extern boolean_t kern_packet_get_group_start(const kern_packet_t); 728 extern void kern_packet_set_group_end(const kern_packet_t); 729 extern boolean_t kern_packet_get_group_end(const kern_packet_t); 730 extern errno_t kern_packet_set_expire_time(const kern_packet_t, const uint64_t); 731 extern errno_t kern_packet_get_expire_time(const kern_packet_t, uint64_t *); 732 extern errno_t kern_packet_set_expiry_action(const kern_packet_t, const packet_expiry_action_t); 733 extern errno_t kern_packet_get_expiry_action(const kern_packet_t, packet_expiry_action_t *); 734 extern errno_t kern_packet_set_token(const kern_packet_t, const void *, 735 const uint16_t); 736 extern errno_t kern_packet_get_token(const kern_packet_t, void *, uint16_t *); 737 extern errno_t kern_packet_get_packetid(const kern_packet_t, packet_id_t *); 738 extern errno_t kern_packet_set_vlan_tag(const kern_packet_t, const uint16_t, 739 const boolean_t); 740 extern errno_t kern_packet_get_vlan_tag(const kern_packet_t, uint16_t *, 741 boolean_t *); 742 extern uint16_t kern_packet_get_vlan_id(const uint16_t); 743 extern uint8_t kern_packet_get_vlan_priority(const uint16_t); 744 extern void kern_packet_set_wake_flag(const kern_packet_t); 745 extern boolean_t kern_packet_get_wake_flag(const kern_packet_t); 746 extern errno_t kern_packet_get_flowid(const kern_packet_t, packet_flowid_t *); 747 extern void kern_packet_set_trace_tag(const kern_packet_t ph, packet_trace_tag_t tag); 748 extern packet_trace_tag_t kern_packet_get_trace_tag(const kern_packet_t ph); 749 extern errno_t kern_packet_get_tx_nexus_port_id(const kern_packet_t, 750 uint32_t *); 751 extern errno_t kern_packet_get_app_metadata(const kern_packet_t, 752 packet_app_metadata_type_t *, uint8_t *); 753 extern errno_t kern_packet_get_protocol_segment_size(const kern_packet_t, 754 uint16_t *); 755 extern void * kern_packet_get_priv(const kern_packet_t); 756 extern void kern_packet_set_priv(const kern_packet_t, void *); 757 extern void kern_packet_get_tso_flags(const kern_packet_t, packet_tso_flags_t *); 758 void kern_packet_set_segment_count(const kern_packet_t, uint8_t); 759 760 /* 761 * Quantum & Packets. 762 */ 763 extern void kern_packet_set_flow_uuid(const kern_packet_t, const uuid_t); 764 extern void kern_packet_get_flow_uuid(const kern_packet_t, uuid_t *); 765 extern void kern_packet_clear_flow_uuid(const kern_packet_t); 766 extern void kern_packet_get_euuid(const kern_packet_t, uuid_t); 767 extern void kern_packet_set_policy_id(const kern_packet_t, uint32_t); 768 extern uint32_t kern_packet_get_policy_id(const kern_packet_t); 769 extern kern_packet_idx_t kern_packet_get_object_index(const kern_packet_t); 770 extern uint32_t kern_packet_get_data_length(const kern_packet_t); 771 extern uint32_t kern_packet_get_buflet_count(const kern_packet_t); 772 extern errno_t kern_packet_set_buflet_count(const kern_packet_t, uint32_t); 773 extern kern_buflet_t kern_packet_get_next_buflet(const kern_packet_t, 774 const kern_buflet_t); 775 extern errno_t kern_packet_finalize(const kern_packet_t); 776 extern errno_t kern_packet_clone(const kern_packet_t, kern_packet_t *, 777 kern_packet_copy_mode_t); 778 extern errno_t kern_packet_clone_nosleep(const kern_packet_t, kern_packet_t *, 779 kern_packet_copy_mode_t); 780 extern errno_t kern_packet_add_buflet(const kern_packet_t ph, 781 const kern_buflet_t bprev, const kern_buflet_t bnew); 782 extern void kern_packet_append(const kern_packet_t, const kern_packet_t); 783 extern kern_packet_t kern_packet_get_next(const kern_packet_t); 784 extern void kern_packet_set_next(const kern_packet_t, const kern_packet_t); 785 extern void kern_packet_set_chain_counts(const kern_packet_t, uint32_t, 786 uint32_t); 787 extern void kern_packet_get_chain_counts(const kern_packet_t, uint32_t *, 788 uint32_t *); 789 790 /* 791 * Misc. 792 */ 793 extern uint32_t kern_inet_checksum(const void *, uint32_t, uint32_t); 794 extern uint32_t kern_copy_and_inet_checksum(const void *, void *, 795 uint32_t, uint32_t); 796 extern void kern_packet_set_trace_id(const kern_packet_t, packet_trace_id_t); 797 extern packet_trace_id_t kern_packet_get_trace_id(const kern_packet_t); 798 extern void kern_packet_trace_event(const kern_packet_t, uint32_t); 799 extern errno_t kern_packet_copy_bytes(const kern_packet_t, size_t, size_t, 800 void*); 801 802 /* 803 * Buflets. 804 */ 805 extern errno_t kern_buflet_set_data_address(const kern_buflet_t, const void *); 806 extern void *kern_buflet_get_data_address(const kern_buflet_t); 807 extern errno_t kern_buflet_set_data_offset(const kern_buflet_t, const uint16_t); 808 extern uint16_t kern_buflet_get_data_offset(const kern_buflet_t); 809 extern errno_t kern_buflet_set_data_length(const kern_buflet_t, const uint16_t); 810 extern uint16_t kern_buflet_get_data_length(const kern_buflet_t); 811 extern void *kern_buflet_get_object_address(const kern_buflet_t); 812 extern uint32_t kern_buflet_get_object_limit(const kern_buflet_t); 813 extern kern_segment_t kern_buflet_get_object_segment(const kern_buflet_t, 814 kern_obj_idx_seg_t *); 815 extern errno_t kern_buflet_set_data_limit(const kern_buflet_t, const uint16_t); 816 extern uint16_t kern_buflet_get_data_limit(const kern_buflet_t); 817 extern errno_t kern_buflet_set_buffer_offset(const kern_buflet_t buf, 818 const uint16_t off); 819 extern uint16_t kern_buflet_get_buffer_offset(const kern_buflet_t buf); 820 extern errno_t kern_buflet_set_gro_len(const kern_buflet_t buf, 821 const uint16_t len); 822 extern uint16_t kern_buflet_get_gro_len(const kern_buflet_t buf); 823 extern void *kern_buflet_get_next_buf(const kern_buflet_t buflet, 824 const void *prev_buf); 825 extern errno_t kern_buflet_clone(const kern_buflet_t buf1, 826 kern_buflet_t *pbuf_array, uint32_t *size, struct kern_pbufpool *pool); 827 extern errno_t kern_buflet_clone_nosleep(const kern_buflet_t buf1, 828 kern_buflet_t *pbuf_array, uint32_t *size, struct kern_pbufpool *pool); 829 830 /* 831 * Packet buffer pool. 832 */ 833 typedef void (*alloc_cb_func_t)(kern_packet_t packet, uint32_t pkt_index, 834 const void *ctx); 835 extern errno_t kern_pbufpool_create(const struct kern_pbufpool_init *, 836 kern_pbufpool_t *, struct kern_pbufpool_memory_info *); 837 extern void *kern_pbufpool_get_context(const kern_pbufpool_t pbufpool); 838 extern errno_t kern_pbufpool_get_memory_info(const kern_pbufpool_t pbufpool, 839 struct kern_pbufpool_memory_info *pbufpool_mem_ref); 840 extern errno_t kern_pbufpool_alloc(const kern_pbufpool_t pbufpool, 841 const uint32_t bufcnt, kern_packet_t *packet); 842 extern errno_t kern_pbufpool_alloc_batch(const kern_pbufpool_t pbufpool, 843 const uint32_t bufcnt, kern_packet_t *array, uint32_t *size); 844 extern errno_t kern_pbufpool_alloc_batch_callback( 845 const kern_pbufpool_t pbufpool, const uint32_t bufcnt, kern_packet_t *array, 846 uint32_t *size, alloc_cb_func_t cb, const void *ctx); 847 extern errno_t kern_pbufpool_alloc_nosleep(const kern_pbufpool_t pbufpool, 848 const uint32_t bufcnt, kern_packet_t *packet); 849 extern errno_t kern_pbufpool_alloc_batch_nosleep(const kern_pbufpool_t pbufpool, 850 const uint32_t bufcnt, kern_packet_t *array, uint32_t *size); 851 extern errno_t kern_pbufpool_alloc_batch_nosleep_callback( 852 const kern_pbufpool_t pbufpool, const uint32_t bufcnt, 853 kern_packet_t *array, uint32_t *size, alloc_cb_func_t cb, const void *ctx); 854 extern void kern_pbufpool_free(const kern_pbufpool_t pbufpool, kern_packet_t); 855 extern void kern_pbufpool_free_batch(const kern_pbufpool_t pbufpool, 856 kern_packet_t *array, uint32_t size); 857 extern void kern_pbufpool_free_chain(const kern_pbufpool_t pbufpool, 858 kern_packet_t chain); 859 extern errno_t kern_pbufpool_alloc_buffer(const kern_pbufpool_t pbufpool, 860 mach_vm_address_t *buffer, kern_segment_t *sg, kern_obj_idx_seg_t *sg_idx); 861 extern errno_t kern_pbufpool_alloc_buffer_nosleep(const kern_pbufpool_t 862 pbufpool, mach_vm_address_t *buffer, kern_segment_t *sg, 863 kern_obj_idx_seg_t *sg_idx); 864 extern void kern_pbufpool_free_buffer(const kern_pbufpool_t pbufpool, 865 mach_vm_address_t baddr); 866 extern errno_t kern_pbufpool_alloc_buflet(const kern_pbufpool_t, 867 kern_buflet_t *, bool); 868 extern errno_t kern_pbufpool_alloc_buflet_nosleep(const kern_pbufpool_t, 869 kern_buflet_t *, bool); 870 extern errno_t kern_pbufpool_alloc_batch_buflet(const kern_pbufpool_t, 871 kern_buflet_t *, uint32_t *size, bool); 872 extern errno_t kern_pbufpool_alloc_batch_buflet_nosleep(const kern_pbufpool_t, 873 kern_buflet_t *, uint32_t *size, bool); 874 extern void kern_pbufpool_free_buflet(const kern_pbufpool_t pp, 875 kern_buflet_t pbuf); 876 extern void kern_pbufpool_destroy(kern_pbufpool_t); 877 extern kern_segment_idx_t kern_segment_get_index(const kern_segment_t); 878 __END_DECLS 879 #endif /* KERNEL */ 880 #endif /* PRIVATE */ 881 #endif /* !_SKYWALK_OS_PACKET_H_ */ 882