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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
718e3744 | 2 | /* |
3 | * RIPngd and zebra interface. | |
4 | * Copyright (C) 1998, 1999 Kunihiro Ishiguro | |
718e3744 | 5 | */ |
6 | ||
7 | #include <zebra.h> | |
8 | ||
9 | #include "command.h" | |
10 | #include "prefix.h" | |
fe08ba7e | 11 | #include "agg_table.h" |
718e3744 | 12 | #include "stream.h" |
c880b636 | 13 | #include "memory.h" |
718e3744 | 14 | #include "routemap.h" |
15 | #include "zclient.h" | |
16 | #include "log.h" | |
17 | ||
18 | #include "ripngd/ripngd.h" | |
c880b636 | 19 | #include "ripngd/ripng_debug.h" |
718e3744 | 20 | |
21 | /* All information about zebra. */ | |
22 | struct zclient *zclient = NULL; | |
57aedde6 | 23 | uint32_t zebra_ecmp_count = MULTIPATH_NUM; |
718e3744 | 24 | |
c880b636 | 25 | /* Send ECMP routes to zebra. */ |
5c84b9a5 RW |
26 | static void ripng_zebra_ipv6_send(struct ripng *ripng, struct agg_node *rp, |
27 | uint8_t cmd) | |
718e3744 | 28 | { |
d62a17ae | 29 | struct list *list = (struct list *)rp->info; |
c9fb3e23 RW |
30 | struct zapi_route api; |
31 | struct zapi_nexthop *api_nh; | |
d62a17ae | 32 | struct listnode *listnode = NULL; |
33 | struct ripng_info *rinfo = NULL; | |
57aedde6 | 34 | uint32_t count = 0; |
26a3ffd6 | 35 | const struct prefix *p = agg_node_get_prefix(rp); |
d62a17ae | 36 | |
c9fb3e23 | 37 | memset(&api, 0, sizeof(api)); |
dde7b15b | 38 | api.vrf_id = ripng->vrf->vrf_id; |
d00061ea | 39 | api.type = ZEBRA_ROUTE_RIPNG; |
d00061ea | 40 | api.safi = SAFI_UNICAST; |
26a3ffd6 | 41 | api.prefix = *p; |
d62a17ae | 42 | |
d00061ea | 43 | SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP); |
d00061ea | 44 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { |
57aedde6 | 45 | if (count >= zebra_ecmp_count) |
a74e593b | 46 | break; |
c9fb3e23 | 47 | api_nh = &api.nexthops[count]; |
dde7b15b | 48 | api_nh->vrf_id = ripng->vrf->vrf_id; |
c9fb3e23 RW |
49 | api_nh->gate.ipv6 = rinfo->nexthop; |
50 | api_nh->ifindex = rinfo->ifindex; | |
51 | api_nh->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
d00061ea | 52 | count++; |
c9fb3e23 | 53 | if (cmd == ZEBRA_ROUTE_ADD) |
d00061ea RW |
54 | SET_FLAG(rinfo->flags, RIPNG_RTF_FIB); |
55 | else | |
56 | UNSET_FLAG(rinfo->flags, RIPNG_RTF_FIB); | |
57 | } | |
d62a17ae | 58 | |
d00061ea | 59 | api.nexthop_num = count; |
d62a17ae | 60 | |
d00061ea | 61 | rinfo = listgetdata(listhead(list)); |
d62a17ae | 62 | |
d00061ea RW |
63 | SET_FLAG(api.message, ZAPI_MESSAGE_METRIC); |
64 | api.metric = rinfo->metric; | |
d62a17ae | 65 | |
d00061ea RW |
66 | if (rinfo->tag) { |
67 | SET_FLAG(api.message, ZAPI_MESSAGE_TAG); | |
68 | api.tag = rinfo->tag; | |
69 | } | |
d62a17ae | 70 | |
c9fb3e23 | 71 | zclient_route_send(cmd, zclient, &api); |
d00061ea RW |
72 | |
73 | if (IS_RIPNG_DEBUG_ZEBRA) { | |
74 | if (ripng->ecmp) | |
26a3ffd6 | 75 | zlog_debug("%s: %pRN nexthops %d", |
c9fb3e23 | 76 | (cmd == ZEBRA_ROUTE_ADD) |
d00061ea RW |
77 | ? "Install into zebra" |
78 | : "Delete from zebra", | |
26a3ffd6 | 79 | rp, count); |
d00061ea | 80 | else |
26a3ffd6 DS |
81 | zlog_debug("%s: %pRN", |
82 | (cmd == ZEBRA_ROUTE_ADD) | |
83 | ? "Install into zebra" | |
84 | : "Delete from zebra", | |
85 | rp); | |
d62a17ae | 86 | } |
718e3744 | 87 | } |
88 | ||
c880b636 | 89 | /* Add/update ECMP routes to zebra. */ |
5c84b9a5 | 90 | void ripng_zebra_ipv6_add(struct ripng *ripng, struct agg_node *rp) |
718e3744 | 91 | { |
5c84b9a5 | 92 | ripng_zebra_ipv6_send(ripng, rp, ZEBRA_ROUTE_ADD); |
c880b636 | 93 | } |
718e3744 | 94 | |
c880b636 | 95 | /* Delete ECMP routes from zebra. */ |
5c84b9a5 | 96 | void ripng_zebra_ipv6_delete(struct ripng *ripng, struct agg_node *rp) |
c880b636 | 97 | { |
5c84b9a5 | 98 | ripng_zebra_ipv6_send(ripng, rp, ZEBRA_ROUTE_DELETE); |
718e3744 | 99 | } |
100 | ||
101 | /* Zebra route add and delete treatment. */ | |
121f9dee | 102 | static int ripng_zebra_read_route(ZAPI_CALLBACK_ARGS) |
718e3744 | 103 | { |
5c84b9a5 | 104 | struct ripng *ripng; |
74489921 | 105 | struct zapi_route api; |
d62a17ae | 106 | struct in6_addr nexthop; |
74489921 | 107 | unsigned long ifindex; |
d62a17ae | 108 | |
5c84b9a5 RW |
109 | ripng = ripng_lookup_by_vrf_id(vrf_id); |
110 | if (!ripng) | |
111 | return 0; | |
112 | ||
74489921 RW |
113 | if (zapi_route_decode(zclient->ibuf, &api) < 0) |
114 | return -1; | |
d62a17ae | 115 | |
74489921 RW |
116 | /* we completely ignore srcdest routes for now. */ |
117 | if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) | |
118 | return 0; | |
d62a17ae | 119 | |
9fb2b879 DS |
120 | if (IN6_IS_ADDR_LINKLOCAL(&api.prefix.u.prefix6)) |
121 | return 0; | |
122 | ||
74489921 RW |
123 | nexthop = api.nexthops[0].gate.ipv6; |
124 | ifindex = api.nexthops[0].ifindex; | |
d62a17ae | 125 | |
121f9dee | 126 | if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD) |
5c84b9a5 RW |
127 | ripng_redistribute_add(ripng, api.type, |
128 | RIPNG_ROUTE_REDISTRIBUTE, | |
74489921 | 129 | (struct prefix_ipv6 *)&api.prefix, |
d62a17ae | 130 | ifindex, &nexthop, api.tag); |
131 | else | |
5c84b9a5 RW |
132 | ripng_redistribute_delete( |
133 | ripng, api.type, RIPNG_ROUTE_REDISTRIBUTE, | |
134 | (struct prefix_ipv6 *)&api.prefix, ifindex); | |
d62a17ae | 135 | |
136 | return 0; | |
718e3744 | 137 | } |
138 | ||
5c84b9a5 | 139 | void ripng_redistribute_conf_update(struct ripng *ripng, int type) |
718e3744 | 140 | { |
2afebed2 DS |
141 | zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP6, |
142 | type, 0, ripng->vrf->vrf_id); | |
db2038c7 | 143 | } |
7076bb2f | 144 | |
5c84b9a5 | 145 | void ripng_redistribute_conf_delete(struct ripng *ripng, int type) |
db2038c7 | 146 | { |
d62a17ae | 147 | if (zclient->sock > 0) |
148 | zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE, zclient, | |
dde7b15b | 149 | AFI_IP6, type, 0, ripng->vrf->vrf_id); |
718e3744 | 150 | |
5c84b9a5 | 151 | ripng_redistribute_withdraw(ripng, type); |
718e3744 | 152 | } |
153 | ||
5c84b9a5 | 154 | int ripng_redistribute_check(struct ripng *ripng, int type) |
a94434b6 | 155 | { |
f9120f71 | 156 | return ripng->redist[type].enabled; |
a94434b6 | 157 | } |
158 | ||
f9120f71 | 159 | void ripng_redistribute_enable(struct ripng *ripng) |
a94434b6 | 160 | { |
db2038c7 | 161 | for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) { |
f9120f71 | 162 | if (!ripng_redistribute_check(ripng, i)) |
db2038c7 | 163 | continue; |
d62a17ae | 164 | |
f9120f71 RW |
165 | zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient, |
166 | AFI_IP6, i, 0, ripng->vrf->vrf_id); | |
167 | } | |
168 | } | |
d62a17ae | 169 | |
f9120f71 RW |
170 | void ripng_redistribute_disable(struct ripng *ripng) |
171 | { | |
172 | for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) { | |
173 | if (!ripng_redistribute_check(ripng, i)) | |
174 | continue; | |
718e3744 | 175 | |
f9120f71 RW |
176 | zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE, zclient, |
177 | AFI_IP6, i, 0, ripng->vrf->vrf_id); | |
d62a17ae | 178 | } |
718e3744 | 179 | } |
180 | ||
5c84b9a5 | 181 | void ripng_redistribute_write(struct vty *vty, struct ripng *ripng) |
718e3744 | 182 | { |
d62a17ae | 183 | int i; |
184 | ||
d00061ea RW |
185 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) { |
186 | if (i == zclient->redist_default | |
f9120f71 | 187 | || !ripng_redistribute_check(ripng, i)) |
d00061ea RW |
188 | continue; |
189 | ||
db2038c7 | 190 | vty_out(vty, " %s", zebra_route_string(i)); |
d00061ea | 191 | } |
718e3744 | 192 | } |
193 | ||
dde7b15b RW |
194 | void ripng_zebra_vrf_register(struct vrf *vrf) |
195 | { | |
196 | if (vrf->vrf_id == VRF_DEFAULT) | |
197 | return; | |
198 | ||
199 | if (IS_RIPNG_DEBUG_EVENT) | |
200 | zlog_debug("%s: register VRF %s(%u) to zebra", __func__, | |
201 | vrf->name, vrf->vrf_id); | |
202 | ||
203 | zclient_send_reg_requests(zclient, vrf->vrf_id); | |
204 | } | |
205 | ||
206 | void ripng_zebra_vrf_deregister(struct vrf *vrf) | |
207 | { | |
208 | if (vrf->vrf_id == VRF_DEFAULT) | |
209 | return; | |
210 | ||
211 | if (IS_RIPNG_DEBUG_EVENT) | |
212 | zlog_debug("%s: deregister VRF %s(%u) from zebra.", __func__, | |
213 | vrf->name, vrf->vrf_id); | |
214 | ||
215 | zclient_send_dereg_requests(zclient, vrf->vrf_id); | |
216 | } | |
217 | ||
d62a17ae | 218 | static void ripng_zebra_connected(struct zclient *zclient) |
7076bb2f | 219 | { |
d62a17ae | 220 | zclient_send_reg_requests(zclient, VRF_DEFAULT); |
7076bb2f FL |
221 | } |
222 | ||
a243d1db DL |
223 | static zclient_handler *const ripng_handlers[] = { |
224 | [ZEBRA_INTERFACE_ADDRESS_ADD] = ripng_interface_address_add, | |
225 | [ZEBRA_INTERFACE_ADDRESS_DELETE] = ripng_interface_address_delete, | |
226 | [ZEBRA_INTERFACE_VRF_UPDATE] = ripng_interface_vrf_update, | |
227 | [ZEBRA_REDISTRIBUTE_ROUTE_ADD] = ripng_zebra_read_route, | |
228 | [ZEBRA_REDISTRIBUTE_ROUTE_DEL] = ripng_zebra_read_route, | |
229 | }; | |
230 | ||
57aedde6 DA |
231 | static void ripng_zebra_capabilities(struct zclient_capabilities *cap) |
232 | { | |
233 | zebra_ecmp_count = MIN(cap->ecmp, zebra_ecmp_count); | |
234 | } | |
235 | ||
718e3744 | 236 | /* Initialize zebra structure and it's commands. */ |
cd9d0537 | 237 | void zebra_init(struct event_loop *master) |
718e3744 | 238 | { |
d62a17ae | 239 | /* Allocate zebra structure. */ |
a243d1db DL |
240 | zclient = zclient_new(master, &zclient_options_default, ripng_handlers, |
241 | array_size(ripng_handlers)); | |
342213ea | 242 | zclient_init(zclient, ZEBRA_ROUTE_RIPNG, 0, &ripngd_privs); |
d62a17ae | 243 | |
244 | zclient->zebra_connected = ripng_zebra_connected; | |
57aedde6 | 245 | zclient->zebra_capabilities = ripng_zebra_capabilities; |
718e3744 | 246 | } |
7feb9237 | 247 | |
d62a17ae | 248 | void ripng_zebra_stop(void) |
7feb9237 | 249 | { |
d62a17ae | 250 | zclient_stop(zclient); |
251 | zclient_free(zclient); | |
7feb9237 | 252 | } |