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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" | |
54d48ea1 | 28 | #include "mpls.h" |
fb018d25 | 29 | |
80c2442a | 30 | /* Maximum next hop string length - gateway + ifindex */ |
31 | #define NEXTHOP_STRLEN (INET6_ADDRSTRLEN + 30) | |
32 | ||
fb018d25 DS |
33 | union g_addr { |
34 | struct in_addr ipv4; | |
fb018d25 | 35 | struct in6_addr ipv6; |
fb018d25 DS |
36 | }; |
37 | ||
38 | enum nexthop_types_t | |
39 | { | |
40 | NEXTHOP_TYPE_IFINDEX = 1, /* Directly connected. */ | |
fb018d25 DS |
41 | NEXTHOP_TYPE_IPV4, /* IPv4 nexthop. */ |
42 | NEXTHOP_TYPE_IPV4_IFINDEX, /* IPv4 nexthop with ifindex. */ | |
fb018d25 DS |
43 | NEXTHOP_TYPE_IPV6, /* IPv6 nexthop. */ |
44 | NEXTHOP_TYPE_IPV6_IFINDEX, /* IPv6 nexthop with ifindex. */ | |
fb018d25 DS |
45 | NEXTHOP_TYPE_BLACKHOLE, /* Null0 nexthop. */ |
46 | }; | |
47 | ||
54d48ea1 | 48 | /* Nexthop label structure. */ |
49 | struct nexthop_label | |
50 | { | |
51 | u_int8_t num_labels; | |
52 | u_int8_t reserved[3]; | |
53 | mpls_label_t label[0]; /* 1 or more labels. */ | |
54 | }; | |
55 | ||
fb018d25 DS |
56 | /* Nexthop structure. */ |
57 | struct nexthop | |
58 | { | |
59 | struct nexthop *next; | |
60 | struct nexthop *prev; | |
61 | ||
62 | /* Interface index. */ | |
b892f1dd | 63 | ifindex_t ifindex; |
fb018d25 DS |
64 | |
65 | enum nexthop_types_t type; | |
66 | ||
67 | u_char flags; | |
68 | #define NEXTHOP_FLAG_ACTIVE (1 << 0) /* This nexthop is alive. */ | |
69 | #define NEXTHOP_FLAG_FIB (1 << 1) /* FIB nexthop. */ | |
70 | #define NEXTHOP_FLAG_RECURSIVE (1 << 2) /* Recursive nexthop. */ | |
71 | #define NEXTHOP_FLAG_ONLINK (1 << 3) /* Nexthop should be installed onlink. */ | |
72 | #define NEXTHOP_FLAG_MATCHED (1 << 4) /* Already matched vs a nexthop */ | |
6e26278c | 73 | #define NEXTHOP_FLAG_FILTERED (1 << 5) /* rmap filtered, used by static only */ |
fb018d25 DS |
74 | |
75 | /* Nexthop address */ | |
76 | union g_addr gate; | |
77 | union g_addr src; | |
c52ef59f | 78 | union g_addr rmap_src; /* Src is set via routemap */ |
fb018d25 DS |
79 | |
80 | /* Nexthops obtained by recursive resolution. | |
81 | * | |
82 | * If the nexthop struct needs to be resolved recursively, | |
83 | * NEXTHOP_FLAG_RECURSIVE will be set in flags and the nexthops | |
84 | * obtained by recursive resolution will be added to `resolved'. | |
85 | * Only one level of recursive resolution is currently supported. */ | |
86 | struct nexthop *resolved; | |
40c7bdb0 | 87 | |
ce549947 RW |
88 | /* Type of label(s), if any */ |
89 | enum lsp_types_t nh_label_type; | |
90 | ||
40c7bdb0 | 91 | /* Label(s) associated with this nexthop. */ |
92 | struct nexthop_label *nh_label; | |
fb018d25 DS |
93 | }; |
94 | ||
18ff3edd DS |
95 | extern int zebra_rnh_ip_default_route; |
96 | extern int zebra_rnh_ipv6_default_route; | |
97 | ||
98 | static inline int | |
99 | nh_resolve_via_default(int family) | |
100 | { | |
101 | if (((family == AF_INET) && zebra_rnh_ip_default_route) || | |
102 | ((family == AF_INET6) && zebra_rnh_ipv6_default_route)) | |
103 | return 1; | |
104 | else | |
105 | return 0; | |
106 | } | |
107 | ||
a399694f DS |
108 | struct nexthop *nexthop_new (void); |
109 | void nexthop_add (struct nexthop **target, struct nexthop *nexthop); | |
110 | ||
111 | void copy_nexthops (struct nexthop **tnh, struct nexthop *nh); | |
112 | void nexthop_free (struct nexthop *nexthop); | |
113 | void nexthops_free (struct nexthop *nexthop); | |
114 | ||
ce549947 | 115 | void nexthop_add_labels (struct nexthop *, enum lsp_types_t, u_int8_t, mpls_label_t *); |
40c7bdb0 | 116 | void nexthop_del_labels (struct nexthop *); |
117 | ||
fb018d25 DS |
118 | extern const char *nexthop_type_to_str (enum nexthop_types_t nh_type); |
119 | extern int nexthop_same_no_recurse (struct nexthop *next1, struct nexthop *next2); | |
a64448ba | 120 | extern int nexthop_labels_match (struct nexthop *nh1, struct nexthop *nh2); |
fb018d25 | 121 | |
80c2442a | 122 | extern const char * nexthop2str (struct nexthop *nexthop, char *str, int size); |
fb018d25 | 123 | #endif /*_LIB_NEXTHOP_H */ |