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__ */ 111