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1 | /* | |
2 | * STATICd - static routes header | |
3 | * Copyright (C) 2018 Cumulus Networks, Inc. | |
4 | * Donald Sharp | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the Free | |
8 | * Software Foundation; either version 2 of the License, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | * more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | #ifndef __STATIC_ROUTES_H__ | |
21 | #define __STATIC_ROUTES_H__ | |
22 | ||
23 | #include "lib/mpls.h" | |
24 | ||
25 | /* Static route label information */ | |
26 | struct static_nh_label { | |
27 | uint8_t num_labels; | |
28 | uint8_t reserved[3]; | |
29 | mpls_label_t label[MPLS_MAX_LABELS]; | |
30 | }; | |
31 | ||
32 | enum static_blackhole_type { | |
33 | STATIC_BLACKHOLE_DROP = 0, | |
34 | STATIC_BLACKHOLE_NULL, | |
35 | STATIC_BLACKHOLE_REJECT | |
36 | }; | |
37 | ||
38 | typedef enum { | |
39 | STATIC_IFNAME, | |
40 | STATIC_IPV4_GATEWAY, | |
41 | STATIC_IPV4_GATEWAY_IFNAME, | |
42 | STATIC_BLACKHOLE, | |
43 | STATIC_IPV6_GATEWAY, | |
44 | STATIC_IPV6_GATEWAY_IFNAME, | |
45 | } static_types; | |
46 | ||
47 | /* | |
48 | * Route Creation gives us: | |
49 | * START -> Initial State, only exit is when we send the route to | |
50 | * zebra for installation | |
51 | * When we send the route to Zebra move to SENT_TO_ZEBRA | |
52 | * SENT_TO_ZEBRA -> A way to notice that we've sent the route to zebra | |
53 | * But have not received a response on it's status yet | |
54 | * After The response from zebra we move to INSTALLED or FAILED | |
55 | * INSTALLED -> Route was accepted | |
56 | * FAILED -> Route was rejected | |
57 | * When we receive notification about a nexthop that a route uses | |
58 | * We move the route back to START and initiate the process again. | |
59 | */ | |
60 | enum static_install_states { | |
61 | STATIC_START, | |
62 | STATIC_SENT_TO_ZEBRA, | |
63 | STATIC_INSTALLED, | |
64 | STATIC_NOT_INSTALLED, | |
65 | }; | |
66 | ||
67 | /* Static route information. */ | |
68 | struct static_route { | |
69 | /* For linked list. */ | |
70 | struct static_route *prev; | |
71 | struct static_route *next; | |
72 | ||
73 | /* VRF identifier. */ | |
74 | vrf_id_t vrf_id; | |
75 | vrf_id_t nh_vrf_id; | |
76 | char nh_vrfname[VRF_NAMSIZ + 1]; | |
77 | ||
78 | /* | |
79 | * States that we walk the route through | |
80 | * To know where we are. | |
81 | */ | |
82 | enum static_install_states state; | |
83 | ||
84 | /* Administrative distance. */ | |
85 | uint8_t distance; | |
86 | ||
87 | /* Tag */ | |
88 | route_tag_t tag; | |
89 | ||
90 | /* Flag for this static route's type. */ | |
91 | static_types type; | |
92 | ||
93 | /* | |
94 | * Nexthop value. | |
95 | */ | |
96 | enum static_blackhole_type bh_type; | |
97 | union g_addr addr; | |
98 | ifindex_t ifindex; | |
99 | bool nh_registered; | |
100 | bool nh_valid; | |
101 | ||
102 | char ifname[INTERFACE_NAMSIZ + 1]; | |
103 | ||
104 | /* Label information */ | |
105 | struct static_nh_label snh_label; | |
106 | ||
107 | uint32_t table_id; | |
108 | ||
109 | /* | |
110 | * Whether to pretend the nexthop is directly attached to the specified | |
111 | * link. Only meaningful when both a gateway address and interface name | |
112 | * are specified. | |
113 | */ | |
114 | bool onlink; | |
115 | }; | |
116 | ||
117 | extern bool mpls_enabled; | |
118 | ||
119 | extern struct zebra_privs_t static_privs; | |
120 | ||
121 | void static_fixup_vrf_ids(struct static_vrf *svrf); | |
122 | ||
123 | extern int static_add_route(afi_t afi, safi_t safi, uint8_t type, | |
124 | struct prefix *p, struct prefix_ipv6 *src_p, | |
125 | union g_addr *gate, const char *ifname, | |
126 | enum static_blackhole_type bh_type, route_tag_t tag, | |
127 | uint8_t distance, struct static_vrf *svrf, | |
128 | struct static_vrf *nh_svrf, | |
129 | struct static_nh_label *snh_label, | |
130 | uint32_t table_id, bool onlink); | |
131 | ||
132 | extern int static_delete_route(afi_t afi, safi_t safi, uint8_t type, | |
133 | struct prefix *p, struct prefix_ipv6 *src_p, | |
134 | union g_addr *gate, const char *ifname, | |
135 | route_tag_t tag, uint8_t distance, | |
136 | struct static_vrf *svrf, | |
137 | struct static_nh_label *snh_label, | |
138 | uint32_t table_id); | |
139 | ||
140 | extern void static_cleanup_vrf_ids(struct static_vrf *disable_svrf); | |
141 | ||
142 | extern void static_install_intf_nh(struct interface *ifp); | |
143 | ||
144 | extern void static_ifindex_update(struct interface *ifp, bool up); | |
145 | #endif |