bsd/net/packet_mangler.h

   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__ */