2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * Route-related (RTM_<NEW|DEL|GET>ROUTE) message header and attributes.
32 #ifndef _NETLINK_ROUTE_ROUTE_H_
33 #define _NETLINK_ROUTE_ROUTE_H_
35 /* Base header for all of the relevant messages */
37 unsigned char rtm_family; /* address family */
38 unsigned char rtm_dst_len; /* Prefix length */
39 unsigned char rtm_src_len; /* Source prefix length (not used) */
40 unsigned char rtm_tos; /* Type of service (not used) */
41 unsigned char rtm_table; /* rtable id */
42 unsigned char rtm_protocol; /* Routing protocol id (RTPROT_) */
43 unsigned char rtm_scope; /* Route distance (RT_SCOPE_) */
44 unsigned char rtm_type; /* Route type (RTN_) */
45 unsigned rtm_flags; /* Route flags (RTM_F_) */
49 * RFC 3549, 3.1.1, route type (rtm_type field).
53 RTN_UNICAST, /* Unicast route */
54 RTN_LOCAL, /* Accept locally (not supported) */
55 RTN_BROADCAST, /* Accept locally as broadcast, send as broadcast */
56 RTN_ANYCAST, /* Accept locally as broadcast, but send as unicast */
57 RTN_MULTICAST, /* Multicast route */
58 RTN_BLACKHOLE, /* Drop traffic towards destination */
59 RTN_UNREACHABLE, /* Destination is unreachable */
60 RTN_PROHIBIT, /* Administratively prohibited */
61 RTN_THROW, /* Not in this table (not supported) */
62 RTN_NAT, /* Translate this address (not supported) */
63 RTN_XRESOLVE, /* Use external resolver (not supported) */
66 #define RTN_MAX (__RTN_MAX - 1)
69 * RFC 3549, 3.1.1, protocol (Identifies what/who added the route).
70 * Values larger than RTPROT_STATIC(4) are not interpreted by the
71 * kernel, they are just for user information.
73 #define RTPROT_UNSPEC 0
74 #define RTPROT_REDIRECT 1 /* Route installed by ICMP redirect */
75 #define RTPROT_KERNEL 2 /* Route installed by kernel */
76 #define RTPROT_BOOT 3 /* Route installed during boot */
77 #define RTPROT_STATIC 4 /* Route installed by administrator */
79 #define RTPROT_GATED 8
82 #define RTPROT_ZEBRA 11
83 #define RTPROT_BIRD 12
84 #define RTPROT_DNROUTED 13
85 #define RTPROT_XORP 14
87 #define RTPROT_DHCP 16
88 #define RTPROT_MROUTED 17
89 #define RTPROT_KEEPALIVED 18
90 #define RTPROT_BABEL 42
91 #define RTPROT_OPENR 99
92 #define RTPROT_BGP 186
93 #define RTPROT_ISIS 187
94 #define RTPROT_OSPF 188
95 #define RTPROT_RIP 189
96 #define RTPROT_EIGRP 192
99 * RFC 3549 3.1.1 Route scope (valid distance to destination).
101 * The values between RT_SCOPE_UNIVERSE(0) and RT_SCOPE_SITE(200)
102 * are available to the user.
105 RT_SCOPE_UNIVERSE = 0,
106 /* User defined values */
110 RT_SCOPE_NOWHERE = 255
114 * RFC 3549 3.1.1 Route flags (rtm_flags).
115 * Is a composition of RTNH_F flags (0x1..0x40 range), RTM_F flags (below)
116 * and per-protocol (IPv4/IPv6) flags.
118 #define RTM_F_NOTIFY 0x00000100 /* not supported */
119 #define RTM_F_CLONED 0x00000200 /* not supported */
120 #define RTM_F_EQUALIZE 0x00000400 /* not supported */
121 #define RTM_F_PREFIX 0x00000800 /* not supported */
122 #define RTM_F_LOOKUP_TABLE 0x00001000 /* not supported */
123 #define RTM_F_FIB_MATCH 0x00002000 /* not supported */
124 #define RTM_F_OFFLOAD 0x00004000 /* not supported */
125 #define RTM_F_TRAP 0x00008000 /* not supported */
126 #define RTM_F_OFFLOAD_FAILED 0x20000000 /* not supported */
128 /* Compatibility handling helpers */
130 #define NL_RTM_HDRLEN ((int)sizeof(struct rtmsg))
131 #define RTM_RTA(_rtm) ((struct rtattr *)((char *)(_rtm) + NL_RTM_HDRLEN))
132 #define RTM_PAYLOAD(_hdr) NLMSG_PAYLOAD((_hdr), NL_RTM_HDRLEN)
136 * Routing table identifiers.
137 * FreeBSD route table numbering starts from 0, where 0 is a valid default routing table.
138 * Indicating "all tables" via netlink can be done by not including RTA_TABLE attribute
139 * and keeping rtm_table=0 (compatibility) or setting RTA_TABLE value to RT_TABLE_UNSPEC.
141 #define RT_TABLE_MAIN 0 /* RT_DEFAULT_FIB */
142 #define RT_TABLE_UNSPEC 0xFFFFFFFF /* RT_ALL_FIBS */
146 NL_RTA_DST = 1, /* binary, IPv4/IPv6 destination */
147 NL_RTA_SRC = 2, /* binary, preferred source address */
148 NL_RTA_IIF = 3, /* not supported */
149 NL_RTA_OIF = 4, /* u32, transmit ifindex */
150 NL_RTA_GATEWAY = 5, /* binary: IPv4/IPv6 gateway */
151 NL_RTA_PRIORITY = 6, /* not supported */
152 NL_RTA_PREFSRC = 7, /* not supported */
153 NL_RTA_METRICS = 8, /* nested, list of NL_RTAX* attrs */
154 NL_RTA_MULTIPATH = 9, /* binary, array of struct rtnexthop */
155 NL_RTA_PROTOINFO = 10, /* not supported / deprecated */
156 NL_RTA_KNH_ID = 10, /* u32, FreeBSD specific, kernel nexthop index */
157 NL_RTA_FLOW = 11, /* not supported */
158 NL_RTA_CACHEINFO = 12, /* not supported */
159 NL_RTA_SESSION = 13, /* not supported / deprecated */
160 NL_RTA_MP_ALGO = 14, /* not supported / deprecated */
161 NL_RTA_RTFLAGS = 14, /* u32, FreeBSD specific, */
162 NL_RTA_TABLE = 15, /* u32, fibnum */
163 NL_RTA_MARK = 16, /* not supported */
164 NL_RTA_MFC_STATS = 17, /* not supported */
165 NL_RTA_VIA = 18, /* binary, struct rtvia */
166 NL_RTA_NEWDST = 19, /* not supported */
167 NL_RTA_PREF = 20, /* not supported */
168 NL_RTA_ENCAP_TYPE = 21, /* not supported */
169 NL_RTA_ENCAP = 22, /* not supported */
170 NL_RTA_EXPIRES = 23, /* u32, seconds till expiration */
171 NL_RTA_PAD = 24, /* not supported */
172 NL_RTA_UID = 25, /* not supported */
173 NL_RTA_TTL_PROPAGATE = 26, /* not supported */
174 NL_RTA_IP_PROTO = 27, /* not supported */
175 NL_RTA_SPORT = 28, /* not supported */
176 NL_RTA_DPORT = 29, /* not supported */
177 NL_RTA_NH_ID = 30, /* u32, nexthop/nexthop group index */
180 #define NL_RTA_MAX (__RTA_MAX - 1)
183 * Attributes that can be used as filters:
189 * RTA_* space has clashes with rtsock namespace.
190 * Use NL_RTA_ prefix in the kernel and map to
193 #define RTA_UNSPEC NL_RTA_UNSPEC
194 #define RTA_DST NL_RTA_DST
195 #define RTA_SRC NL_RTA_SRC
196 #define RTA_IIF NL_RTA_IIF
197 #define RTA_OIF NL_RTA_OIF
198 #define RTA_GATEWAY NL_RTA_GATEWAY
199 #define RTA_PRIORITY NL_RTA_PRIORITY
200 #define RTA_PREFSRC NL_RTA_PREFSRC
201 #define RTA_METRICS NL_RTA_METRICS
202 #define RTA_MULTIPATH NL_RTA_MULTIPATH
203 #define RTA_PROTOINFO NL_RTA_PROTOINFO
204 #define RTA_KNH_ID NL_RTA_KNH_ID
205 #define RTA_FLOW NL_RTA_FLOW
206 #define RTA_CACHEINFO NL_RTA_CACHEINFO
207 #define RTA_SESSION NL_RTA_SESSION
208 #define RTA_MP_ALGO NL_RTA_MP_ALGO
209 #define RTA_TABLE NL_RTA_TABLE
210 #define RTA_MARK NL_RTA_MARK
211 #define RTA_MFC_STATS NL_RTA_MFC_STATS
212 #define RTA_VIA NL_RTA_VIA
213 #define RTA_NEWDST NL_RTA_NEWDST
214 #define RTA_PREF NL_RTA_PREF
215 #define RTA_ENCAP_TYPE NL_RTA_ENCAP_TYPE
216 #define RTA_ENCAP NL_RTA_ENCAP
217 #define RTA_EXPIRES NL_RTA_EXPIRES
218 #define RTA_PAD NL_RTA_PAD
219 #define RTA_UID NL_RTA_UID
220 #define RTA_TTL_PROPAGATE NL_RTA_TTL_PROPAGATE
221 #define RTA_IP_PROTO NL_RTA_IP_PROTO
222 #define RTA_SPORT NL_RTA_SPORT
223 #define RTA_DPORT NL_RTA_DPORT
224 #define RTA_NH_ID NL_RTA_NH_ID
225 #define RTA_MAX NL_RTA_MAX
228 /* route attribute header */
230 unsigned short rta_len;
231 unsigned short rta_type;
234 #define NL_RTA_ALIGN_SIZE NL_ITEM_ALIGN_SIZE
235 #define NL_RTA_ALIGN NL_ITEM_ALIGN
236 #define NL_RTA_HDRLEN ((int)sizeof(struct rtattr))
237 #define NL_RTA_DATA_LEN(_rta) ((int)((_rta)->rta_len - NL_RTA_HDRLEN))
238 #define NL_RTA_DATA(_rta) NL_ITEM_DATA(_rta, NL_RTA_HDRLEN)
239 #define NL_RTA_DATA_CONST(_rta) NL_ITEM_DATA_CONST(_rta, NL_RTA_HDRLEN)
241 /* Compatibility attribute handling helpers */
243 #define RTA_ALIGNTO NL_RTA_ALIGN_SIZE
244 #define RTA_ALIGN(_len) NL_RTA_ALIGN(_len)
245 #define _RTA_LEN(_rta) ((int)(_rta)->rta_len)
246 #define _RTA_ALIGNED_LEN(_rta) RTA_ALIGN(_RTA_LEN(_rta))
247 #define RTA_OK(_rta, _len) NL_ITEM_OK(_rta, _len, NL_RTA_HDRLEN, _RTA_LEN)
248 #define RTA_NEXT(_rta, _len) NL_ITEM_ITER(_rta, _len, _RTA_ALIGNED_LEN)
249 #define RTA_LENGTH(_len) (NL_RTA_HDRLEN + (_len))
250 #define RTA_SPACE(_len) RTA_ALIGN(RTA_LENGTH(_len))
251 #define RTA_DATA(_rta) NL_RTA_DATA(_rta)
252 #define RTA_PAYLOAD(_rta) ((int)(_RTA_LEN(_rta) - NL_RTA_HDRLEN))
255 /* RTA attribute headers */
259 sa_family_t rtvia_family;
260 uint8_t rtvia_addr[0];
264 * RTA_METRICS is a nested attribute, consisting of a list of
265 * TLVs with types defined below.
269 NL_RTAX_LOCK = 1, /* not supported */
270 NL_RTAX_MTU = 2, /* desired path MTU */
271 NL_RTAX_WINDOW = 3, /* not supported */
272 NL_RTAX_RTT = 4, /* not supported */
273 NL_RTAX_RTTVAR = 5, /* not supported */
274 NL_RTAX_SSTHRESH = 6, /* not supported */
275 NL_RTAX_CWND = 7, /* not supported */
276 NL_RTAX_ADVMSS = 8, /* not supported */
277 NL_RTAX_REORDERING = 9, /* not supported */
278 NL_RTAX_HOPLIMIT = 10, /* not supported */
279 NL_RTAX_INITCWND = 11, /* not supporrted */
280 NL_RTAX_FEATURES = 12, /* not supported */
281 NL_RTAX_RTO_MIN = 13, /* not supported */
282 NL_RTAX_INITRWND = 14, /* not supported */
283 NL_RTAX_QUICKACK = 15, /* not supported */
284 NL_RTAX_CC_ALGO = 15, /* not supported */
285 NL_RTAX_FASTOPEN_NO_COOKIE = 16, /* not supported */
288 #define NL_RTAX_MAX (__NL_RTAX_MAX - 1)
290 #define RTAX_FEATURE_ECN (1 << 0)
291 #define RTAX_FEATURE_SACK (1 << 1)
292 #define RTAX_FEATURE_TIMESTAMP (1 << 2)
293 #define RTAX_FEATURE_ALLFRAG (1 << 3)
295 #define RTAX_FEATURE_MASK \
296 (RTAX_FEATURE_ECN | RTAX_FEATURE_SACK | RTAX_FEATURE_TIMESTAMP | \
297 RTAX_FEATURE_ALLFRAG)
302 * RTAX_* space clashes with rtsock namespace.
303 * Use NL_RTAX_ prefix in the kernel and map to
304 * RTAX_ for userland.
306 #define RTAX_UNSPEC NL_RTAX_UNSPEC
307 #define RTAX_LOCK NL_RTAX_LOCK
308 #define RTAX_MTU NL_RTAX_MTU
309 #define RTAX_WINDOW NL_RTAX_WINDOW
310 #define RTAX_RTT NL_RTAX_RTT
311 #define RTAX_RTTVAR NL_RTAX_RTTVAR
312 #define RTAX_SSTHRESH NL_RTAX_SSTHRESH
313 #define RTAX_CWND NL_RTAX_CWND
314 #define RTAX_ADVMSS NL_RTAX_ADVMSS
315 #define RTAX_REORDERING NL_RTAX_REORDERING
316 #define RTAX_HOPLIMIT NL_RTAX_HOPLIMIT
317 #define RTAX_INITCWND NL_RTAX_INITCWND
318 #define RTAX_FEATURES NL_RTAX_FEATURES
319 #define RTAX_RTO_MIN NL_RTAX_RTO_MIN
320 #define RTAX_INITRWND NL_RTAX_INITRWND
321 #define RTAX_QUICKACK NL_RTAX_QUICKACK
322 #define RTAX_CC_ALGO NL_RTAX_CC_ALGO
323 #define RTAX_FASTOPEN_NO_COOKIE NL_RTAX_FASTOPEN_NO_COOKIE
327 * RTA_MULTIPATH consists of an array of rtnexthop structures.
328 * Each rtnexthop structure contains RTA_GATEWAY or RTA_VIA
329 * attribute following the header.
332 unsigned short rtnh_len;
333 unsigned char rtnh_flags;
334 unsigned char rtnh_hops; /* nexthop weight */
339 #define RTNH_F_DEAD 0x01 /* not supported */
340 #define RTNH_F_PERVASIVE 0x02 /* not supported */
341 #define RTNH_F_ONLINK 0x04 /* not supported */
342 #define RTNH_F_OFFLOAD 0x08 /* not supported */
343 #define RTNH_F_LINKDOWN 0x10 /* not supported */
344 #define RTNH_F_UNRESOLVED 0x20 /* not supported */
345 #define RTNH_F_TRAP 0x40 /* not supported */
347 #define RTNH_COMPARE_MASK (RTNH_F_DEAD | RTNH_F_LINKDOWN | \
348 RTNH_F_OFFLOAD | RTNH_F_TRAP)
350 /* Macros to handle hexthops */
351 #define RTNH_ALIGNTO NL_ITEM_ALIGN_SIZE
352 #define RTNH_ALIGN(_len) NL_ITEM_ALIGN(_len)
353 #define RTNH_HDRLEN ((int)sizeof(struct rtnexthop))
354 #define _RTNH_LEN(_nh) ((int)(_nh)->rtnh_len)
355 #define _RTNH_ALIGNED_LEN(_nh) RTNH_ALIGN(_RTNH_LEN(_nh))
356 #define RTNH_OK(_nh, _len) NL_ITEM_OK(_nh, _len, RTNH_HDRLEN, _RTNH_LEN)
357 #define RTNH_NEXT(_nh) ((struct rtnexthop *)((char *)(_nh) + _RTNH_ALIGNED_LEN(_nh)))
358 #define RTNH_LENGTH(_len) (RTNH_HDRLEN + (_len))
359 #define RTNH_SPACE(_len) RTNH_ALIGN(RTNH_LENGTH(_len))
360 #define RTNH_DATA(_nh) ((struct rtattr *)NL_ITEM_DATA(_nh, RTNH_HDRLEN))
363 unsigned char rtgen_family;