xref: /freebsd/sys/netinet/in_fib.h (revision 32100375a661c1e16588ddfa7b90ca8d26cb9786)
1 /*-
2  * Copyright (c) 2015
3  * 	Alexander V. Chernikov <melifaro@FreeBSD.org>
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  * 3. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * $FreeBSD$
30  */
31 
32 #ifndef _NETINET_IN_FIB_H_
33 #define	_NETINET_IN_FIB_H_
34 
35 struct route_in {
36 	/* common fields shared among all 'struct route' */
37 	struct nhop_object *ro_nh;
38 	struct	llentry *ro_lle;
39 	char		*ro_prepend;
40 	uint16_t	ro_plen;
41 	uint16_t	ro_flags;
42 	uint16_t	ro_mtu;	/* saved ro_rt mtu */
43 	uint16_t	spare;
44 	/* custom sockaddr */
45 	struct sockaddr_in ro_dst4;
46 };
47 
48 /* Basic nexthop info used for uRPF/mtu checks */
49 struct nhop4_basic {
50 	struct ifnet	*nh_ifp;	/* Logical egress interface */
51 	uint16_t	nh_mtu;		/* nexthop mtu */
52 	uint16_t	nh_flags;	/* nhop flags */
53 	struct in_addr	nh_addr;	/* GW/DST IPv4 address */
54 };
55 
56 /* Extended nexthop info used for control protocols */
57 struct nhop4_extended {
58 	struct ifnet	*nh_ifp;	/* Logical egress interface */
59 	struct in_ifaddr *nh_ia;	/* Associated address */
60 	uint16_t	nh_mtu;		/* nexthop mtu */
61 	uint16_t	nh_flags;	/* nhop flags */
62 	uint8_t		spare[4];
63 	struct in_addr	nh_addr;	/* GW/DST IPv4 address */
64 	struct in_addr	nh_src;		/* default source IPv4 address */
65 	uint64_t	spare2;
66 };
67 
68 int fib4_lookup_nh_basic(uint32_t fibnum, struct in_addr dst, uint32_t flags,
69     uint32_t flowid, struct nhop4_basic *pnh4);
70 int fib4_lookup_nh_ext(uint32_t fibnum, struct in_addr dst, uint32_t flags,
71     uint32_t flowid, struct nhop4_extended *pnh4);
72 void fib4_free_nh_ext(uint32_t fibnum, struct nhop4_extended *pnh4);
73 
74 struct nhop_object *fib4_lookup(uint32_t fibnum, struct in_addr dst,
75     uint32_t scopeid, uint32_t flags, uint32_t flowid);
76 int fib4_check_urpf(uint32_t fibnum, struct in_addr dst, uint32_t scopeid,
77     uint32_t flags, const struct ifnet *src_if);
78 struct nhop_object *fib4_lookup_debugnet(uint32_t fibnum, struct in_addr dst,
79     uint32_t scopeid, uint32_t flags);
80 #endif
81 
82