if_pfsync.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2001 Michael Shalayeff
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   19  * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
   20  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   22  * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   24  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
   25  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   26  * THE POSSIBILITY OF SUCH DAMAGE.
   27  */
   28 
   29 /*-
   30  * Copyright (c) 2008 David Gwynne <dlg@openbsd.org>
   31  *
   32  * Permission to use, copy, modify, and distribute this software for any
   33  * purpose with or without fee is hereby granted, provided that the above
   34  * copyright notice and this permission notice appear in all copies.
   35  *
   36  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   37  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   38  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   39  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   40  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   41  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   42  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   43  */
   44 
   45 /*
   46  *      $OpenBSD: if_pfsync.h,v 1.35 2008/06/29 08:42:15 mcbride Exp $
   47  *      $FreeBSD$
   48  */
   49 
   50 
   51 #ifndef _NET_IF_PFSYNC_H_
   52 #define _NET_IF_PFSYNC_H_
   53 
   54 #define PFSYNC_VERSION          5
   55 #define PFSYNC_DFLTTL           255
   56 
   57 #define PFSYNC_ACT_CLR          0       /* clear all states */
   58 #define PFSYNC_ACT_INS          1       /* insert state */
   59 #define PFSYNC_ACT_INS_ACK      2       /* ack of insterted state */
   60 #define PFSYNC_ACT_UPD          3       /* update state */
   61 #define PFSYNC_ACT_UPD_C        4       /* "compressed" update state */
   62 #define PFSYNC_ACT_UPD_REQ      5       /* request "uncompressed" state */
   63 #define PFSYNC_ACT_DEL          6       /* delete state */
   64 #define PFSYNC_ACT_DEL_C        7       /* "compressed" delete state */
   65 #define PFSYNC_ACT_INS_F        8       /* insert fragment */
   66 #define PFSYNC_ACT_DEL_F        9       /* delete fragments */
   67 #define PFSYNC_ACT_BUS          10      /* bulk update status */
   68 #define PFSYNC_ACT_TDB          11      /* TDB replay counter update */
   69 #define PFSYNC_ACT_EOF          12      /* end of frame */
   70 #define PFSYNC_ACT_MAX          13
   71 
   72 /*
   73  * A pfsync frame is built from a header followed by several sections which
   74  * are all prefixed with their own subheaders. Frames must be terminated with
   75  * an EOF subheader.
   76  *
   77  * | ...                        |
   78  * | IP header                  |
   79  * +============================+
   80  * | pfsync_header              |
   81  * +----------------------------+
   82  * | pfsync_subheader           |
   83  * +----------------------------+
   84  * | first action fields        |
   85  * | ...                        |
   86  * +----------------------------+
   87  * | pfsync_subheader           |
   88  * +----------------------------+
   89  * | second action fields       |
   90  * | ...                        |
   91  * +----------------------------+
   92  * | EOF pfsync_subheader       |
   93  * +----------------------------+
   94  * | HMAC                       |
   95  * +============================+
   96  */
   97 
   98 /*
   99  * Frame header
  100  */
  101 
  102 struct pfsync_header {
  103         u_int8_t                        version;
  104         u_int8_t                        _pad;
  105         u_int16_t                       len;
  106         u_int8_t                        pfcksum[PF_MD5_DIGEST_LENGTH];
  107 } __packed;
  108 
  109 /*
  110  * Frame region subheader
  111  */
  112 
  113 struct pfsync_subheader {
  114         u_int8_t                        action;
  115         u_int8_t                        _pad;
  116         u_int16_t                       count;
  117 } __packed;
  118 
  119 /*
  120  * CLR
  121  */
  122 
  123 struct pfsync_clr {
  124         char                            ifname[IFNAMSIZ];
  125         u_int32_t                       creatorid;
  126 } __packed;
  127 
  128 /*
  129  * INS, UPD, DEL
  130  */
  131 
  132 /* these use struct pfsync_state in pfvar.h */
  133 
  134 /*
  135  * INS_ACK
  136  */
  137 
  138 struct pfsync_ins_ack {
  139         u_int64_t                       id;
  140         u_int32_t                       creatorid;
  141 } __packed;
  142 
  143 /*
  144  * UPD_C
  145  */
  146 
  147 struct pfsync_upd_c {
  148         u_int64_t                       id;
  149         struct pfsync_state_peer        src;
  150         struct pfsync_state_peer        dst;
  151         u_int32_t                       creatorid;
  152         u_int32_t                       expire;
  153         u_int8_t                        timeout;
  154         u_int8_t                        _pad[3];
  155 } __packed;
  156 
  157 /*
  158  * UPD_REQ
  159  */
  160 
  161 struct pfsync_upd_req {
  162         u_int64_t                       id;
  163         u_int32_t                       creatorid;
  164 } __packed;
  165 
  166 /*
  167  * DEL_C
  168  */
  169 
  170 struct pfsync_del_c {
  171         u_int64_t                       id;
  172         u_int32_t                       creatorid;
  173 } __packed;
  174 
  175 /*
  176  * INS_F, DEL_F
  177  */
  178 
  179 /* not implemented (yet) */
  180 
  181 /*
  182  * BUS
  183  */
  184 
  185 struct pfsync_bus {
  186         u_int32_t                       creatorid;
  187         u_int32_t                       endtime;
  188         u_int8_t                        status;
  189 #define PFSYNC_BUS_START                        1
  190 #define PFSYNC_BUS_END                          2
  191         u_int8_t                        _pad[3];
  192 } __packed;
  193 
  194 /*
  195  * TDB
  196  */
  197 
  198 struct pfsync_tdb {
  199         u_int32_t                       spi;
  200         union sockaddr_union            dst;
  201         u_int32_t                       rpl;
  202         u_int64_t                       cur_bytes;
  203         u_int8_t                        sproto;
  204         u_int8_t                        updates;
  205         u_int8_t                        _pad[2];
  206 } __packed;
  207 
  208 #define PFSYNC_HDRLEN           sizeof(struct pfsync_header)
  209 
  210 struct pfsyncstats {
  211         u_int64_t       pfsyncs_ipackets;       /* total input packets, IPv4 */
  212         u_int64_t       pfsyncs_ipackets6;      /* total input packets, IPv6 */
  213         u_int64_t       pfsyncs_badif;          /* not the right interface */
  214         u_int64_t       pfsyncs_badttl;         /* TTL is not PFSYNC_DFLTTL */
  215         u_int64_t       pfsyncs_hdrops;         /* packets shorter than hdr */
  216         u_int64_t       pfsyncs_badver;         /* bad (incl unsupp) version */
  217         u_int64_t       pfsyncs_badact;         /* bad action */
  218         u_int64_t       pfsyncs_badlen;         /* data length does not match */
  219         u_int64_t       pfsyncs_badauth;        /* bad authentication */
  220         u_int64_t       pfsyncs_stale;          /* stale state */
  221         u_int64_t       pfsyncs_badval;         /* bad values */
  222         u_int64_t       pfsyncs_badstate;       /* insert/lookup failed */
  223 
  224         u_int64_t       pfsyncs_opackets;       /* total output packets, IPv4 */
  225         u_int64_t       pfsyncs_opackets6;      /* total output packets, IPv6 */
  226         u_int64_t       pfsyncs_onomem;         /* no memory for an mbuf */
  227         u_int64_t       pfsyncs_oerrors;        /* ip output error */
  228 
  229         u_int64_t       pfsyncs_iacts[PFSYNC_ACT_MAX];
  230         u_int64_t       pfsyncs_oacts[PFSYNC_ACT_MAX];
  231 };
  232 
  233 /*
  234  * Configuration structure for SIOCSETPFSYNC SIOCGETPFSYNC
  235  */
  236 struct pfsyncreq {
  237         char             pfsyncr_syncdev[IFNAMSIZ];
  238         struct in_addr   pfsyncr_syncpeer;
  239         int              pfsyncr_maxupdates;
  240 #define PFSYNCF_OK              0x00000001
  241 #define PFSYNCF_DEFER           0x00000002
  242         int              pfsyncr_defer;
  243 };
  244 
  245 #define SIOCSETPFSYNC   _IOW('i', 247, struct ifreq)
  246 #define SIOCGETPFSYNC   _IOWR('i', 248, struct ifreq)
  247 
  248 #ifdef _KERNEL
  249 
  250 /*
  251  * this shows where a pf state is with respect to the syncing.
  252  */
  253 #define PFSYNC_S_INS    0x00
  254 #define PFSYNC_S_IACK   0x01
  255 #define PFSYNC_S_UPD    0x02
  256 #define PFSYNC_S_UPD_C  0x03
  257 #define PFSYNC_S_DEL    0x04
  258 #define PFSYNC_S_COUNT  0x05
  259 
  260 #define PFSYNC_S_DEFER  0xfe
  261 #define PFSYNC_S_NONE   0xff
  262 
  263 #define PFSYNC_SI_IOCTL         0x01
  264 #define PFSYNC_SI_CKSUM         0x02
  265 #define PFSYNC_SI_ACK           0x04
  266 
  267 #endif /* _KERNEL */
  268 
  269 #endif /* _NET_IF_PFSYNC_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/net/if_pfsync.h

FreeBSD/Linux Kernel Cross Reference
sys/net/if_pfsync.h