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	1	/*
	2	* Copyright (c) 2012-2014 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_PKTAP_H_
	30	#define _NET_PKTAP_H_
	31
	32	#include <sys/_types/_timeval32.h>
	33	#include <stdint.h>
	34	#include <net/if.h>
	35	#include <uuid/uuid.h>
	36
	37	#ifdef PRIVATE
	38
	39	#define PKTAP_IFNAME "pktap"
	40
	41	/* To store interface name + unit */
	42	#define PKTAP_IFXNAMESIZE (IF_NAMESIZE + 8)
	43
	44	/*
	45	* Commands via SIOCGDRVSPEC/SIOCSDRVSPEC
	46	*/
	47	#define PKTP_CMD_FILTER_GET 1 /* array of PKTAP_MAX_FILTERS * struct pktap_filter */
	48	#define PKTP_CMD_FILTER_SET 3 /* array of PKTAP_MAX_FILTERS * struct pktap_filter */
	49	#define PKTP_CMD_TAP_COUNT 4 /* uint32_t number of active bpf tap on the interface */
	50
	51	/*
	52	* Filtering is currently based on network interface properties --
	53	* the interface type and the interface name -- and has two types of
	54	* operations -- pass and skip.
	55	* By default only interfaces of type IFT_ETHER and IFT_CELLULAR pass
	56	* the filter.
	57	* It's possible to include other interfaces by type or by name
	58	* The interface type is evaluated before the interface name
	59	* The first matching rule stops the evaluation.
	60	* A rule with interface type 0 (zero) matches any interfaces
	61	*/
	62	#define PKTAP_FILTER_OP_NONE 0 /* For inactive entries at the end of the list */
	63	#define PKTAP_FILTER_OP_PASS 1
	64	#define PKTAP_FILTER_OP_SKIP 2
	65
	66	#define PKTAP_FILTER_PARAM_NONE 0
	67	#define PKTAP_FILTER_PARAM_IF_TYPE 1
	68	#define PKTAP_FILTER_PARAM_IF_NAME 2
	69
	70	#ifdef BSD_KERNEL_PRIVATE
	71	struct pktap_filter {
	72	uint32_t filter_op;
	73	uint32_t filter_param;
	74	union {
	75	uint32_t _filter_if_type;
	76	char _filter_if_name[PKTAP_IFXNAMESIZE];
	77	} param_;
	78	size_t filter_ifname_prefix_len;
	79	};
	80
	81	struct x_pktap_filter {
	82	#else
	83	struct pktap_filter {
	84	#endif /* BSD_KERNEL_PRIVATE */
	85	uint32_t filter_op;
	86	uint32_t filter_param;
	87	union {
	88	uint32_t _filter_if_type;
	89	char _filter_if_name[PKTAP_IFXNAMESIZE];
	90	} param_;
	91	};
	92	#define filter_param_if_type param_._filter_if_type
	93	#define filter_param_if_name param_._filter_if_name
	94
	95	#define PKTAP_MAX_FILTERS 8
	96
	97	/*
	98	* Header for DLT_PKTAP
	99	*
	100	* In theory, there could be several types of blocks in a chain before the actual packet
	101	*/
	102	struct pktap_header {
	103	uint32_t pth_length; /* length of this header */
	104	uint32_t pth_type_next; /* type of data following */
	105	uint32_t pth_dlt; /* DLT of packet */
	106	char pth_ifname[PKTAP_IFXNAMESIZE]; /* interface name */
	107	uint32_t pth_flags; /* flags */
	108	uint32_t pth_protocol_family;
	109	uint32_t pth_frame_pre_length;
	110	uint32_t pth_frame_post_length;
	111	pid_t pth_pid; /* process ID */
	112	char pth_comm[MAXCOMLEN+1]; /* process name */
	113	uint32_t pth_svc; /* service class */
	114	uint16_t pth_iftype;
	115	uint16_t pth_ifunit;
	116	pid_t pth_epid; /* effective process ID */
	117	char pth_ecomm[MAXCOMLEN+1]; /* effective command name */
	118	uint32_t pth_flowid;
	119	uint32_t pth_ipproto;
	120	struct timeval32 pth_tstamp;
	121	uuid_t pth_uuid;
	122	uuid_t pth_euuid;
	123	};
	124
	125	/*
	126	*
	127	*/
	128	#define PTH_TYPE_NONE 0 /* No more data following */
	129	#define PTH_TYPE_PACKET 1 /* Actual captured packet data */
	130
	131	#define PTH_FLAG_DIR_IN 0x0001 /* Outgoing packet */
	132	#define PTH_FLAG_DIR_OUT 0x0002 /* Incoming packet */
	133	#define PTH_FLAG_PROC_DELEGATED 0x0004 /* Process delegated */
	134	#define PTH_FLAG_IF_DELEGATED 0x0008 /* Interface delegated */
	135	#ifdef BSD_KERNEL_PRIVATE
	136	#define PTH_FLAG_DELAY_PKTAP 0x1000 /* Finalize pktap header on read */
	137	#endif /* BSD_KERNEL_PRIVATE */
	138	#define PTH_FLAG_TSTAMP 0x2000 /* Has time stamp */
	139
	140
	141	#ifdef BSD_KERNEL_PRIVATE
	142	extern void pktap_init(void);
	143	extern void pktap_input(struct ifnet , protocol_family_t, struct mbuf , char *);
	144	extern void pktap_output(struct ifnet , protocol_family_t, struct mbuf ,
	145	u_int32_t, u_int32_t);
	146	extern void pktap_fill_proc_info(struct pktap_header *, protocol_family_t ,
	147	struct mbuf , u_int32_t , int , struct ifnet );
	148	extern void pktap_finalize_proc_info(struct pktap_header *);
	149
	150	#endif /* BSD_KERNEL_PRIVATE */
	151	#endif /* PRIVATE */
	152
	153	#endif /* _NET_PKTAP_H_ */