FreeBSD/Linux Kernel Cross Reference
sys/net/if_pfsync.h
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 #ifndef _NET_IF_PFSYNC_H_
51 #define _NET_IF_PFSYNC_H_
52
53 #include <sys/types.h>
54
55 #include <net/if.h>
56 #include <net/pfvar.h>
57 #include <netpfil/pf/pf.h>
58
59 #define PFSYNC_VERSION 5
60 #define PFSYNC_DFLTTL 255
61
62 #define PFSYNC_ACT_CLR 0 /* clear all states */
63 #define PFSYNC_ACT_INS 1 /* insert state */
64 #define PFSYNC_ACT_INS_ACK 2 /* ack of inserted state */
65 #define PFSYNC_ACT_UPD 3 /* update state */
66 #define PFSYNC_ACT_UPD_C 4 /* "compressed" update state */
67 #define PFSYNC_ACT_UPD_REQ 5 /* request "uncompressed" state */
68 #define PFSYNC_ACT_DEL 6 /* delete state */
69 #define PFSYNC_ACT_DEL_C 7 /* "compressed" delete state */
70 #define PFSYNC_ACT_INS_F 8 /* insert fragment */
71 #define PFSYNC_ACT_DEL_F 9 /* delete fragments */
72 #define PFSYNC_ACT_BUS 10 /* bulk update status */
73 #define PFSYNC_ACT_TDB 11 /* TDB replay counter update */
74 #define PFSYNC_ACT_EOF 12 /* end of frame */
75 #define PFSYNC_ACT_MAX 13
76
77 /*
78 * A pfsync frame is built from a header followed by several sections which
79 * are all prefixed with their own subheaders. Frames must be terminated with
80 * an EOF subheader.
81 *
82 * | ... |
83 * | IP header |
84 * +============================+
85 * | pfsync_header |
86 * +----------------------------+
87 * | pfsync_subheader |
88 * +----------------------------+
89 * | first action fields |
90 * | ... |
91 * +----------------------------+
92 * | pfsync_subheader |
93 * +----------------------------+
94 * | second action fields |
95 * | ... |
96 * +----------------------------+
97 * | EOF pfsync_subheader |
98 * +----------------------------+
99 * | HMAC |
100 * +============================+
101 */
102
103 /*
104 * Frame header
105 */
106
107 struct pfsync_header {
108 u_int8_t version;
109 u_int8_t _pad;
110 u_int16_t len;
111 u_int8_t pfcksum[PF_MD5_DIGEST_LENGTH];
112 } __packed;
113
114 /*
115 * Frame region subheader
116 */
117
118 struct pfsync_subheader {
119 u_int8_t action;
120 u_int8_t _pad;
121 u_int16_t count;
122 } __packed;
123
124 /*
125 * CLR
126 */
127
128 struct pfsync_clr {
129 char ifname[IFNAMSIZ];
130 u_int32_t creatorid;
131 } __packed;
132
133 /*
134 * INS, UPD, DEL
135 */
136
137 /* these use struct pfsync_state in pfvar.h */
138
139 /*
140 * INS_ACK
141 */
142
143 struct pfsync_ins_ack {
144 u_int64_t id;
145 u_int32_t creatorid;
146 } __packed;
147
148 /*
149 * UPD_C
150 */
151
152 struct pfsync_upd_c {
153 u_int64_t id;
154 struct pfsync_state_peer src;
155 struct pfsync_state_peer dst;
156 u_int32_t creatorid;
157 u_int32_t expire;
158 u_int8_t timeout;
159 u_int8_t _pad[3];
160 } __packed;
161
162 /*
163 * UPD_REQ
164 */
165
166 struct pfsync_upd_req {
167 u_int64_t id;
168 u_int32_t creatorid;
169 } __packed;
170
171 /*
172 * DEL_C
173 */
174
175 struct pfsync_del_c {
176 u_int64_t id;
177 u_int32_t creatorid;
178 } __packed;
179
180 /*
181 * INS_F, DEL_F
182 */
183
184 /* not implemented (yet) */
185
186 /*
187 * BUS
188 */
189
190 struct pfsync_bus {
191 u_int32_t creatorid;
192 u_int32_t endtime;
193 u_int8_t status;
194 #define PFSYNC_BUS_START 1
195 #define PFSYNC_BUS_END 2
196 u_int8_t _pad[3];
197 } __packed;
198
199 /*
200 * TDB
201 */
202
203 struct pfsync_tdb {
204 u_int32_t spi;
205 union sockaddr_union dst;
206 u_int32_t rpl;
207 u_int64_t cur_bytes;
208 u_int8_t sproto;
209 u_int8_t updates;
210 u_int8_t _pad[2];
211 } __packed;
212
213 #define PFSYNC_HDRLEN sizeof(struct pfsync_header)
214
215 struct pfsyncstats {
216 u_int64_t pfsyncs_ipackets; /* total input packets, IPv4 */
217 u_int64_t pfsyncs_ipackets6; /* total input packets, IPv6 */
218 u_int64_t pfsyncs_badif; /* not the right interface */
219 u_int64_t pfsyncs_badttl; /* TTL is not PFSYNC_DFLTTL */
220 u_int64_t pfsyncs_hdrops; /* packets shorter than hdr */
221 u_int64_t pfsyncs_badver; /* bad (incl unsupp) version */
222 u_int64_t pfsyncs_badact; /* bad action */
223 u_int64_t pfsyncs_badlen; /* data length does not match */
224 u_int64_t pfsyncs_badauth; /* bad authentication */
225 u_int64_t pfsyncs_stale; /* stale state */
226 u_int64_t pfsyncs_badval; /* bad values */
227 u_int64_t pfsyncs_badstate; /* insert/lookup failed */
228
229 u_int64_t pfsyncs_opackets; /* total output packets, IPv4 */
230 u_int64_t pfsyncs_opackets6; /* total output packets, IPv6 */
231 u_int64_t pfsyncs_onomem; /* no memory for an mbuf */
232 u_int64_t pfsyncs_oerrors; /* ip output error */
233
234 u_int64_t pfsyncs_iacts[PFSYNC_ACT_MAX];
235 u_int64_t pfsyncs_oacts[PFSYNC_ACT_MAX];
236 };
237
238 /*
239 * Configuration structure for SIOCSETPFSYNC SIOCGETPFSYNC
240 */
241 struct pfsyncreq {
242 char pfsyncr_syncdev[IFNAMSIZ];
243 struct in_addr pfsyncr_syncpeer;
244 int pfsyncr_maxupdates;
245 #define PFSYNCF_OK 0x00000001
246 #define PFSYNCF_DEFER 0x00000002
247 int pfsyncr_defer;
248 };
249
250 struct pfsync_kstatus {
251 char syncdev[IFNAMSIZ];
252 struct sockaddr_storage syncpeer;
253 int maxupdates;
254 int flags;
255 };
256
257 struct pfsyncioc_nv {
258 void *data;
259 size_t len; /* The length of the nvlist data. */
260 size_t size; /* The total size of the data buffer. */
261 };
262
263 #define SIOCSETPFSYNC _IOW('i', 247, struct ifreq)
264 #define SIOCGETPFSYNC _IOWR('i', 248, struct ifreq)
265 #define SIOCSETPFSYNCNV _IOW('i', 249, struct ifreq)
266 #define SIOCGETPFSYNCNV _IOWR('i', 250, struct ifreq)
267
268 #ifdef _KERNEL
269
270 /*
271 * this shows where a pf state is with respect to the syncing.
272 */
273 #define PFSYNC_S_INS 0x00
274 #define PFSYNC_S_IACK 0x01
275 #define PFSYNC_S_UPD 0x02
276 #define PFSYNC_S_UPD_C 0x03
277 #define PFSYNC_S_DEL 0x04
278 #define PFSYNC_S_COUNT 0x05
279
280 #define PFSYNC_S_DEFER 0xfe
281 #define PFSYNC_S_NONE 0xff
282
283 #define PFSYNC_SI_IOCTL 0x01
284 #define PFSYNC_SI_CKSUM 0x02
285 #define PFSYNC_SI_ACK 0x04
286
287 #endif /* _KERNEL */
288
289 #endif /* _NET_IF_PFSYNC_H_ */
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