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fb018d25 DS |
1 | /* |
2 | * Nexthop structure definition. | |
a399694f | 3 | * Copyright (C) 1997, 98, 99, 2001 Kunihiro Ishiguro |
fb018d25 DS |
4 | * Copyright (C) 2013 Cumulus Networks, Inc. |
5 | * | |
a399694f | 6 | * This file is part of Quagga. |
fb018d25 | 7 | * |
a399694f | 8 | * Quagga is free software; you can redistribute it and/or modify it |
fb018d25 DS |
9 | * under the terms of the GNU General Public License as published by the |
10 | * Free Software Foundation; either version 2, or (at your option) any | |
11 | * later version. | |
12 | * | |
a399694f | 13 | * Quagga is distributed in the hope that it will be useful, but |
fb018d25 DS |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
a399694f | 19 | * along with Quagga; see the file COPYING. If not, write to the Free |
fb018d25 DS |
20 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
21 | * 02111-1307, USA. | |
22 | */ | |
23 | ||
24 | #ifndef _LIB_NEXTHOP_H | |
25 | #define _LIB_NEXTHOP_H | |
26 | ||
27 | #include "prefix.h" | |
28 | ||
29 | union g_addr { | |
30 | struct in_addr ipv4; | |
fb018d25 | 31 | struct in6_addr ipv6; |
fb018d25 DS |
32 | }; |
33 | ||
34 | enum nexthop_types_t | |
35 | { | |
36 | NEXTHOP_TYPE_IFINDEX = 1, /* Directly connected. */ | |
fb018d25 DS |
37 | NEXTHOP_TYPE_IPV4, /* IPv4 nexthop. */ |
38 | NEXTHOP_TYPE_IPV4_IFINDEX, /* IPv4 nexthop with ifindex. */ | |
fb018d25 DS |
39 | NEXTHOP_TYPE_IPV6, /* IPv6 nexthop. */ |
40 | NEXTHOP_TYPE_IPV6_IFINDEX, /* IPv6 nexthop with ifindex. */ | |
fb018d25 DS |
41 | NEXTHOP_TYPE_BLACKHOLE, /* Null0 nexthop. */ |
42 | }; | |
43 | ||
44 | /* Nexthop structure. */ | |
45 | struct nexthop | |
46 | { | |
47 | struct nexthop *next; | |
48 | struct nexthop *prev; | |
49 | ||
50 | /* Interface index. */ | |
fb018d25 DS |
51 | unsigned int ifindex; |
52 | ||
53 | enum nexthop_types_t type; | |
54 | ||
55 | u_char flags; | |
56 | #define NEXTHOP_FLAG_ACTIVE (1 << 0) /* This nexthop is alive. */ | |
57 | #define NEXTHOP_FLAG_FIB (1 << 1) /* FIB nexthop. */ | |
58 | #define NEXTHOP_FLAG_RECURSIVE (1 << 2) /* Recursive nexthop. */ | |
59 | #define NEXTHOP_FLAG_ONLINK (1 << 3) /* Nexthop should be installed onlink. */ | |
60 | #define NEXTHOP_FLAG_MATCHED (1 << 4) /* Already matched vs a nexthop */ | |
6e26278c | 61 | #define NEXTHOP_FLAG_FILTERED (1 << 5) /* rmap filtered, used by static only */ |
fb018d25 DS |
62 | |
63 | /* Nexthop address */ | |
64 | union g_addr gate; | |
65 | union g_addr src; | |
c52ef59f | 66 | union g_addr rmap_src; /* Src is set via routemap */ |
fb018d25 DS |
67 | |
68 | /* Nexthops obtained by recursive resolution. | |
69 | * | |
70 | * If the nexthop struct needs to be resolved recursively, | |
71 | * NEXTHOP_FLAG_RECURSIVE will be set in flags and the nexthops | |
72 | * obtained by recursive resolution will be added to `resolved'. | |
73 | * Only one level of recursive resolution is currently supported. */ | |
74 | struct nexthop *resolved; | |
75 | }; | |
76 | ||
18ff3edd DS |
77 | extern int zebra_rnh_ip_default_route; |
78 | extern int zebra_rnh_ipv6_default_route; | |
79 | ||
80 | static inline int | |
81 | nh_resolve_via_default(int family) | |
82 | { | |
83 | if (((family == AF_INET) && zebra_rnh_ip_default_route) || | |
84 | ((family == AF_INET6) && zebra_rnh_ipv6_default_route)) | |
85 | return 1; | |
86 | else | |
87 | return 0; | |
88 | } | |
89 | ||
a399694f DS |
90 | struct nexthop *nexthop_new (void); |
91 | void nexthop_add (struct nexthop **target, struct nexthop *nexthop); | |
92 | ||
93 | void copy_nexthops (struct nexthop **tnh, struct nexthop *nh); | |
94 | void nexthop_free (struct nexthop *nexthop); | |
95 | void nexthops_free (struct nexthop *nexthop); | |
96 | ||
fb018d25 DS |
97 | extern const char *nexthop_type_to_str (enum nexthop_types_t nh_type); |
98 | extern int nexthop_same_no_recurse (struct nexthop *next1, struct nexthop *next2); | |
99 | ||
100 | #endif /*_LIB_NEXTHOP_H */ |