sys/net/if_pfsync.h

   1 /*-
   2  * Copyright (c) 2001 Michael Shalayeff
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
  18  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  19  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  20  * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  22  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  23  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  24  * THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 /*-
  28  * Copyright (c) 2008 David Gwynne <dlg@openbsd.org>
  29  *
  30  * Permission to use, copy, modify, and distribute this software for any
  31  * purpose with or without fee is hereby granted, provided that the above
  32  * copyright notice and this permission notice appear in all copies.
  33  *
  34  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  35  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  36  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  37  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  38  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  39  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  40  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  41  */
  42
  43 /*
  44  *      $OpenBSD: if_pfsync.h,v 1.35 2008/06/29 08:42:15 mcbride Exp $
  45  *      $FreeBSD$
  46  */
  47
  48
  49 #ifndef _NET_IF_PFSYNC_H_
  50 #define _NET_IF_PFSYNC_H_
  51
  52 #define PFSYNC_VERSION          5
  53 #define PFSYNC_DFLTTL           255
  54
  55 #define PFSYNC_ACT_CLR          0       /* clear all states */
  56 #define PFSYNC_ACT_INS          1       /* insert state */
  57 #define PFSYNC_ACT_INS_ACK      2       /* ack of insterted state */
  58 #define PFSYNC_ACT_UPD          3       /* update state */
  59 #define PFSYNC_ACT_UPD_C        4       /* "compressed" update state */
  60 #define PFSYNC_ACT_UPD_REQ      5       /* request "uncompressed" state */
  61 #define PFSYNC_ACT_DEL          6       /* delete state */
  62 #define PFSYNC_ACT_DEL_C        7       /* "compressed" delete state */
  63 #define PFSYNC_ACT_INS_F        8       /* insert fragment */
  64 #define PFSYNC_ACT_DEL_F        9       /* delete fragments */
  65 #define PFSYNC_ACT_BUS          10      /* bulk update status */
  66 #define PFSYNC_ACT_TDB          11      /* TDB replay counter update */
  67 #define PFSYNC_ACT_EOF          12      /* end of frame */
  68 #define PFSYNC_ACT_MAX          13
  69
  70 /*
  71  * A pfsync frame is built from a header followed by several sections which
  72  * are all prefixed with their own subheaders. Frames must be terminated with
  73  * an EOF subheader.
  74  *
  75  * | ...                        |
  76  * | IP header                  |
  77  * +============================+
  78  * | pfsync_header              |
  79  * +----------------------------+
  80  * | pfsync_subheader           |
  81  * +----------------------------+
  82  * | first action fields        |
  83  * | ...                        |
  84  * +----------------------------+
  85  * | pfsync_subheader           |
  86  * +----------------------------+
  87  * | second action fields       |
  88  * | ...                        |
  89  * +----------------------------+
  90  * | EOF pfsync_subheader       |
  91  * +----------------------------+
  92  * | HMAC                       |
  93  * +============================+
  94  */
  95
  96 /*
  97  * Frame header
  98  */
  99
 100 struct pfsync_header {
 101         u_int8_t                        version;
 102         u_int8_t                        _pad;
 103         u_int16_t                       len;
 104         u_int8_t                        pfcksum[PF_MD5_DIGEST_LENGTH];
 105 } __packed;
 106
 107 /*
 108  * Frame region subheader
 109  */
 110
 111 struct pfsync_subheader {
 112         u_int8_t                        action;
 113         u_int8_t                        _pad;
 114         u_int16_t                       count;
 115 } __packed;
 116
 117 /*
 118  * CLR
 119  */
 120
 121 struct pfsync_clr {
 122         char                            ifname[IFNAMSIZ];
 123         u_int32_t                       creatorid;
 124 } __packed;
 125
 126 /*
 127  * INS, UPD, DEL
 128  */
 129
 130 /* these use struct pfsync_state in pfvar.h */
 131
 132 /*
 133  * INS_ACK
 134  */
 135
 136 struct pfsync_ins_ack {
 137         u_int64_t                       id;
 138         u_int32_t                       creatorid;
 139 } __packed;
 140
 141 /*
 142  * UPD_C
 143  */
 144
 145 struct pfsync_upd_c {
 146         u_int64_t                       id;
 147         struct pfsync_state_peer        src;
 148         struct pfsync_state_peer        dst;
 149         u_int32_t                       creatorid;
 150         u_int32_t                       expire;
 151         u_int8_t                        timeout;
 152         u_int8_t                        _pad[3];
 153 } __packed;
 154
 155 /*
 156  * UPD_REQ
 157  */
 158
 159 struct pfsync_upd_req {
 160         u_int64_t                       id;
 161         u_int32_t                       creatorid;
 162 } __packed;
 163
 164 /*
 165  * DEL_C
 166  */
 167
 168 struct pfsync_del_c {
 169         u_int64_t                       id;
 170         u_int32_t                       creatorid;
 171 } __packed;
 172
 173 /*
 174  * INS_F, DEL_F
 175  */
 176
 177 /* not implemented (yet) */
 178
 179 /*
 180  * BUS
 181  */
 182
 183 struct pfsync_bus {
 184         u_int32_t                       creatorid;
 185         u_int32_t                       endtime;
 186         u_int8_t                        status;
 187 #define PFSYNC_BUS_START                        1
 188 #define PFSYNC_BUS_END                          2
 189         u_int8_t                        _pad[3];
 190 } __packed;
 191
 192 /*
 193  * TDB
 194  */
 195
 196 struct pfsync_tdb {
 197         u_int32_t                       spi;
 198         union sockaddr_union            dst;
 199         u_int32_t                       rpl;
 200         u_int64_t                       cur_bytes;
 201         u_int8_t                        sproto;
 202         u_int8_t                        updates;
 203         u_int8_t                        _pad[2];
 204 } __packed;
 205
 206 #define PFSYNC_HDRLEN           sizeof(struct pfsync_header)
 207
 208 struct pfsyncstats {
 209         u_int64_t       pfsyncs_ipackets;       /* total input packets, IPv4 */
 210         u_int64_t       pfsyncs_ipackets6;      /* total input packets, IPv6 */
 211         u_int64_t       pfsyncs_badif;          /* not the right interface */
 212         u_int64_t       pfsyncs_badttl;         /* TTL is not PFSYNC_DFLTTL */
 213         u_int64_t       pfsyncs_hdrops;         /* packets shorter than hdr */
 214         u_int64_t       pfsyncs_badver;         /* bad (incl unsupp) version */
 215         u_int64_t       pfsyncs_badact;         /* bad action */
 216         u_int64_t       pfsyncs_badlen;         /* data length does not match */
 217         u_int64_t       pfsyncs_badauth;        /* bad authentication */
 218         u_int64_t       pfsyncs_stale;          /* stale state */
 219         u_int64_t       pfsyncs_badval;         /* bad values */
 220         u_int64_t       pfsyncs_badstate;       /* insert/lookup failed */
 221
 222         u_int64_t       pfsyncs_opackets;       /* total output packets, IPv4 */
 223         u_int64_t       pfsyncs_opackets6;      /* total output packets, IPv6 */
 224         u_int64_t       pfsyncs_onomem;         /* no memory for an mbuf */
 225         u_int64_t       pfsyncs_oerrors;        /* ip output error */
 226
 227         u_int64_t       pfsyncs_iacts[PFSYNC_ACT_MAX];
 228         u_int64_t       pfsyncs_oacts[PFSYNC_ACT_MAX];
 229 };
 230
 231 /*
 232  * Configuration structure for SIOCSETPFSYNC SIOCGETPFSYNC
 233  */
 234 struct pfsyncreq {
 235         char             pfsyncr_syncdev[IFNAMSIZ];
 236         struct in_addr   pfsyncr_syncpeer;
 237         int              pfsyncr_maxupdates;
 238         int              pfsyncr_defer;
 239 };
 240
 241 #define SIOCSETPFSYNC   _IOW('i', 247, struct ifreq)
 242 #define SIOCGETPFSYNC   _IOWR('i', 248, struct ifreq)
 243
 244 #ifdef _KERNEL
 245
 246 /*
 247  * this shows where a pf state is with respect to the syncing.
 248  */
 249 #define PFSYNC_S_INS    0x00
 250 #define PFSYNC_S_IACK   0x01
 251 #define PFSYNC_S_UPD    0x02
 252 #define PFSYNC_S_UPD_C  0x03
 253 #define PFSYNC_S_DEL    0x04
 254 #define PFSYNC_S_COUNT  0x05
 255
 256 #define PFSYNC_S_DEFER  0xfe
 257 #define PFSYNC_S_NONE   0xff
 258
 259 #define PFSYNC_SI_IOCTL         0x01
 260 #define PFSYNC_SI_CKSUM         0x02
 261 #define PFSYNC_SI_ACK           0x04
 262
 263 #endif /* _KERNEL */
 264
 265 #endif /* _NET_IF_PFSYNC_H_ */