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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 | * | |
896014f4 DL |
18 | * You should have received a copy of the GNU General Public License along |
19 | * with this program; see the file COPYING; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
fb018d25 DS |
21 | */ |
22 | ||
23 | #ifndef _LIB_NEXTHOP_H | |
24 | #define _LIB_NEXTHOP_H | |
25 | ||
26 | #include "prefix.h" | |
54d48ea1 | 27 | #include "mpls.h" |
fb018d25 | 28 | |
80c2442a | 29 | /* Maximum next hop string length - gateway + ifindex */ |
30 | #define NEXTHOP_STRLEN (INET6_ADDRSTRLEN + 30) | |
31 | ||
fb018d25 DS |
32 | union g_addr { |
33 | struct in_addr ipv4; | |
fb018d25 | 34 | struct in6_addr ipv6; |
fb018d25 DS |
35 | }; |
36 | ||
37 | enum nexthop_types_t | |
38 | { | |
39 | NEXTHOP_TYPE_IFINDEX = 1, /* Directly connected. */ | |
fb018d25 DS |
40 | NEXTHOP_TYPE_IPV4, /* IPv4 nexthop. */ |
41 | NEXTHOP_TYPE_IPV4_IFINDEX, /* IPv4 nexthop with ifindex. */ | |
fb018d25 DS |
42 | NEXTHOP_TYPE_IPV6, /* IPv6 nexthop. */ |
43 | NEXTHOP_TYPE_IPV6_IFINDEX, /* IPv6 nexthop with ifindex. */ | |
fb018d25 DS |
44 | NEXTHOP_TYPE_BLACKHOLE, /* Null0 nexthop. */ |
45 | }; | |
46 | ||
54d48ea1 | 47 | /* Nexthop label structure. */ |
48 | struct nexthop_label | |
49 | { | |
50 | u_int8_t num_labels; | |
51 | u_int8_t reserved[3]; | |
52 | mpls_label_t label[0]; /* 1 or more labels. */ | |
53 | }; | |
54 | ||
fb018d25 DS |
55 | /* Nexthop structure. */ |
56 | struct nexthop | |
57 | { | |
58 | struct nexthop *next; | |
59 | struct nexthop *prev; | |
60 | ||
61 | /* Interface index. */ | |
b892f1dd | 62 | ifindex_t ifindex; |
fb018d25 DS |
63 | |
64 | enum nexthop_types_t type; | |
65 | ||
66 | u_char flags; | |
67 | #define NEXTHOP_FLAG_ACTIVE (1 << 0) /* This nexthop is alive. */ | |
68 | #define NEXTHOP_FLAG_FIB (1 << 1) /* FIB nexthop. */ | |
69 | #define NEXTHOP_FLAG_RECURSIVE (1 << 2) /* Recursive nexthop. */ | |
70 | #define NEXTHOP_FLAG_ONLINK (1 << 3) /* Nexthop should be installed onlink. */ | |
71 | #define NEXTHOP_FLAG_MATCHED (1 << 4) /* Already matched vs a nexthop */ | |
6e26278c | 72 | #define NEXTHOP_FLAG_FILTERED (1 << 5) /* rmap filtered, used by static only */ |
fb018d25 DS |
73 | |
74 | /* Nexthop address */ | |
75 | union g_addr gate; | |
76 | union g_addr src; | |
c52ef59f | 77 | union g_addr rmap_src; /* Src is set via routemap */ |
fb018d25 DS |
78 | |
79 | /* Nexthops obtained by recursive resolution. | |
80 | * | |
81 | * If the nexthop struct needs to be resolved recursively, | |
82 | * NEXTHOP_FLAG_RECURSIVE will be set in flags and the nexthops | |
83 | * obtained by recursive resolution will be added to `resolved'. | |
84 | * Only one level of recursive resolution is currently supported. */ | |
85 | struct nexthop *resolved; | |
40c7bdb0 | 86 | |
ce549947 RW |
87 | /* Type of label(s), if any */ |
88 | enum lsp_types_t nh_label_type; | |
89 | ||
40c7bdb0 | 90 | /* Label(s) associated with this nexthop. */ |
91 | struct nexthop_label *nh_label; | |
fb018d25 DS |
92 | }; |
93 | ||
18ff3edd DS |
94 | extern int zebra_rnh_ip_default_route; |
95 | extern int zebra_rnh_ipv6_default_route; | |
96 | ||
97 | static inline int | |
98 | nh_resolve_via_default(int family) | |
99 | { | |
100 | if (((family == AF_INET) && zebra_rnh_ip_default_route) || | |
101 | ((family == AF_INET6) && zebra_rnh_ipv6_default_route)) | |
102 | return 1; | |
103 | else | |
104 | return 0; | |
105 | } | |
106 | ||
a399694f DS |
107 | struct nexthop *nexthop_new (void); |
108 | void nexthop_add (struct nexthop **target, struct nexthop *nexthop); | |
109 | ||
110 | void copy_nexthops (struct nexthop **tnh, struct nexthop *nh); | |
111 | void nexthop_free (struct nexthop *nexthop); | |
112 | void nexthops_free (struct nexthop *nexthop); | |
113 | ||
ce549947 | 114 | void nexthop_add_labels (struct nexthop *, enum lsp_types_t, u_int8_t, mpls_label_t *); |
40c7bdb0 | 115 | void nexthop_del_labels (struct nexthop *); |
116 | ||
fb018d25 DS |
117 | extern const char *nexthop_type_to_str (enum nexthop_types_t nh_type); |
118 | extern int nexthop_same_no_recurse (struct nexthop *next1, struct nexthop *next2); | |
a64448ba | 119 | extern int nexthop_labels_match (struct nexthop *nh1, struct nexthop *nh2); |
fb018d25 | 120 | |
80c2442a | 121 | extern const char * nexthop2str (struct nexthop *nexthop, char *str, int size); |
fb018d25 | 122 | #endif /*_LIB_NEXTHOP_H */ |