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	1	/*
	2	* Copyright (c) 2014 Apple Inc. All rights reserved.
	3	*
	4	* @APPLE_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. Please obtain a copy of the License at
	10	* http://www.opensource.apple.com/apsl/ and read it before using this
	11	* file.
	12	*
	13	* The Original Code and all software distributed under the License are
	14	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	17	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	18	* Please see the License for the specific language governing rights and
	19	* limitations under the License.
	20	*
	21	* @APPLE_LICENSE_HEADER_END@
	22	*/
	23
	24	#ifndef __PACKET_MANGLER_H__
	25	#define __PACKET_MANGLER_H__
	26
	27	#include <sys/param.h>
	28	#include <sys/types.h>
	29	#include <sys/socket.h>
	30	#include <sys/syslog.h>
	31	#include <netinet/in.h>
	32	#include <stdint.h>
	33
	34	#ifdef BSD_KERNEL_PRIVATE
	35	#include <sys/mbuf.h>
	36	#include <sys/socketvar.h>
	37	#endif /* BSD_KERNEL_PRIVATE */
	38
	39	__BEGIN_DECLS
	40
	41	#ifdef PRIVATE
	42
	43	typedef enum {
	44	INOUT,
	45	IN,
	46	OUT
	47	} Pkt_Mnglr_Flow;
	48
	49	/*
	50	* Kernel control name for an instance of a packet mangler.
	51	* Use CTLIOCGINFO to find out the corresponding kernel control id
	52	* to be set in the sc_id field of sockaddr_ctl for connect(2)
	53	* Note: the sc_unit is ephemeral
	54	*/
	55	#define PACKET_MANGLER_CONTROL_NAME "com.apple.packet-mangler"
	56
	57	#define PKT_MNGLR_OPT_PROTO_ACT_MASK 1
	58	#define PKT_MNGLR_OPT_IP_ACT_MASK 2
	59	#define PKT_MNGLR_OPT_LOCAL_IP 3
	60	#define PKT_MNGLR_OPT_REMOTE_IP 4
	61	#define PKT_MNGLR_OPT_LOCAL_PORT 5
	62	#define PKT_MNGLR_OPT_REMOTE_PORT 6
	63	#define PKT_MNGLR_OPT_DIRECTION 7
	64	#define PKT_MNGLR_OPT_PROTOCOL 8
	65	#define PKT_MNGLR_OPT_ACTIVATE 0xFFFFFFFF
	66
	67	/* Packet mangler action masks */
	68	/* Packet Mangler TCP action mask */
	69	#define PKT_MNGLR_TCP_ACT_NOP_MPTCP 0x00000001
	70	#define PKT_MNGLR_TCP_ACT_SWAP_L_PORT 0x00000002
	71	#define PKT_MNGLR_TCP_ACT_SWAP_R_PORT 0x00000004
	72	#define PKT_MNGLR_TCP_ACT_DSS_DROP 0x00000008
	73	#define PKT_MNGLR_TCP_ACT_CHK_EXTENDED 0x80000000
	74
	75	/* Packet Mangler IP action mask */
	76	#define PKT_MNGLR_IP_ACT_FLT_L_IP 0x00000001
	77	#define PKT_MNGLR_IP_ACT_FLT_R_IP 0x00000002
	78	#define PKT_MNGLR_IP_ACT_SWAP_L_IP 0x00000004
	79	#define PKT_MNGLR_IP_ACT_SWAP_R_IP 0x00000008
	80	#define PKT_MNGLR_IP_ACT_DROP_PACKET 0x00000010
	81	#define PKT_MNGLR_IP_ACT_CHK_EXTENDED 0x80000000
	82
	83	/*
	84	* How many filter may be active simultaneously
	85	*/
	86	#define PKT_MNGLR_MAX_FILTER_COUNT 1
	87
	88	#define PKT_MNGLR_VERSION_CURRENT 1
	89
	90	#endif /* PRIVATE */
	91
	92	#ifdef BSD_KERNEL_PRIVATE
	93
	94	extern int pkt_mnglr_log_level;
	95
	96	#define PKT_MNGLR_LOG(level, fmt, ...) \
	97	do { \
	98	if (pkt_mnglr_log_level >= level) \
	99	printf("%s:%d " fmt "\n",\
	100	__FUNCTION__, __LINE__, ##__VA_ARGS__); \
	101	} while (0)
	102
	103
	104	extern void pkt_mnglr_init(void);
	105
	106	__END_DECLS
	107
	108	#endif /* BSD_KERNEL_PRIVATE */
	109
	110	#endif /* __PACKET_MANGLER_H__ */