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5435a2bf | 1 | /* |
63d4bd12 QY |
2 | * VRRP Zebra interfacing. |
3 | * Copyright (C) 2018-2019 Cumulus Networks, Inc. | |
4 | * Quentin Young | |
5435a2bf QY |
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 | #include <zebra.h> | |
21 | ||
b6029d6a | 22 | #include "lib/if.h" |
63d4bd12 | 23 | #include "lib/linklist.h" |
b6029d6a QY |
24 | #include "lib/log.h" |
25 | #include "lib/prefix.h" | |
b6029d6a | 26 | #include "lib/vty.h" |
63d4bd12 | 27 | #include "lib/zclient.h" |
5435a2bf | 28 | |
b6029d6a | 29 | #include "vrrp.h" |
dca8cfcc | 30 | #include "vrrp_debug.h" |
5435a2bf QY |
31 | #include "vrrp_zebra.h" |
32 | ||
dca8cfcc QY |
33 | #define VRRP_LOGPFX "[ZEBRA] " |
34 | ||
2fff50ec | 35 | static struct zclient *zclient; |
b6029d6a | 36 | |
dca8cfcc QY |
37 | static void vrrp_zebra_debug_if_state(struct interface *ifp, vrf_id_t vrf_id, |
38 | const char *func) | |
39 | { | |
40 | DEBUGD(&vrrp_dbg_zebra, | |
76bcde9e QY |
41 | "%s: %s index %d(%u) parent %d mac %02x:%02x:%02x:%02x:%02x:%02x flags %ld metric %d mtu %d operative %d", |
42 | func, ifp->name, vrf_id, ifp->link_ifindex, ifp->ifindex, | |
43 | ifp->hw_addr[0], ifp->hw_addr[1], ifp->hw_addr[2], | |
44 | ifp->hw_addr[3], ifp->hw_addr[4], ifp->hw_addr[5], | |
45 | (long)ifp->flags, ifp->metric, ifp->mtu, if_is_operative(ifp)); | |
dca8cfcc QY |
46 | } |
47 | ||
48 | static void vrrp_zebra_debug_if_dump_address(struct interface *ifp, | |
49 | const char *func) | |
50 | { | |
51 | struct connected *ifc; | |
52 | struct listnode *node; | |
53 | ||
54 | DEBUGD(&vrrp_dbg_zebra, "%s: interface %s addresses:", func, ifp->name); | |
55 | ||
56 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) { | |
57 | struct prefix *p = ifc->address; | |
58 | ||
dca8cfcc QY |
59 | DEBUGD(&vrrp_dbg_zebra, "%s: interface %s address %s %s", func, |
60 | ifp->name, inet_ntoa(p->u.prefix4), | |
61 | CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY) ? "secondary" | |
62 | : "primary"); | |
63 | } | |
64 | } | |
65 | ||
66 | ||
b6029d6a QY |
67 | static void vrrp_zebra_connected(struct zclient *zclient) |
68 | { | |
b6029d6a QY |
69 | zclient_send_reg_requests(zclient, VRF_DEFAULT); |
70 | } | |
71 | ||
72 | /* Router-id update message from zebra. */ | |
73 | static int vrrp_router_id_update_zebra(int command, struct zclient *zclient, | |
74 | zebra_size_t length, vrf_id_t vrf_id) | |
75 | { | |
76 | struct prefix router_id; | |
77 | ||
78 | zebra_router_id_update_read(zclient->ibuf, &router_id); | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
ef7bd2a3 | 83 | int vrrp_ifp_create(struct interface *ifp) |
b6029d6a | 84 | { |
ef7bd2a3 | 85 | vrrp_zebra_debug_if_state(ifp, ifp->vrf_id, __func__); |
dca8cfcc | 86 | |
6e93585e | 87 | vrrp_if_add(ifp); |
b6029d6a QY |
88 | |
89 | return 0; | |
90 | } | |
91 | ||
92 | static int vrrp_zebra_if_del(int command, struct zclient *zclient, | |
93 | zebra_size_t length, vrf_id_t vrf_id) | |
94 | { | |
95 | struct interface *ifp; | |
96 | ||
97 | ifp = zebra_interface_state_read(zclient->ibuf, vrf_id); | |
dca8cfcc | 98 | |
b6029d6a QY |
99 | if (!ifp) |
100 | return 0; | |
101 | ||
dca8cfcc | 102 | vrrp_zebra_debug_if_state(ifp, vrf_id, __func__); |
27fd8827 | 103 | |
dca8cfcc | 104 | vrrp_if_del(ifp); |
b6029d6a | 105 | |
2d8cb4be QY |
106 | if_set_index(ifp, IFINDEX_INTERNAL); |
107 | ||
b6029d6a QY |
108 | return 0; |
109 | } | |
110 | ||
111 | static int vrrp_zebra_if_state_up(int command, struct zclient *zclient, | |
112 | zebra_size_t length, vrf_id_t vrf_id) | |
113 | { | |
114 | struct interface *ifp; | |
115 | ||
116 | /* | |
117 | * zebra api notifies interface up/down events by using the same call | |
118 | * zebra_interface_state_read below, see comments in lib/zclient.c ifp = | |
119 | * zebra_interface_state_read(zclient->ibuf, vrf_id); | |
120 | */ | |
121 | ifp = zebra_interface_state_read(zclient->ibuf, vrf_id); | |
dca8cfcc | 122 | |
b6029d6a QY |
123 | if (!ifp) |
124 | return 0; | |
125 | ||
dca8cfcc | 126 | vrrp_zebra_debug_if_state(ifp, vrf_id, __func__); |
27fd8827 | 127 | |
dca8cfcc | 128 | vrrp_if_up(ifp); |
b6029d6a QY |
129 | |
130 | return 0; | |
131 | } | |
132 | ||
133 | static int vrrp_zebra_if_state_down(int command, struct zclient *zclient, | |
134 | zebra_size_t length, vrf_id_t vrf_id) | |
135 | { | |
136 | struct interface *ifp; | |
137 | ||
138 | /* | |
139 | * zebra api notifies interface up/down events by using the same call | |
140 | * zebra_interface_state_read below, see comments in lib/zclient.c | |
141 | */ | |
142 | ifp = zebra_interface_state_read(zclient->ibuf, vrf_id); | |
dca8cfcc | 143 | |
b6029d6a QY |
144 | if (!ifp) |
145 | return 0; | |
146 | ||
dca8cfcc | 147 | vrrp_zebra_debug_if_state(ifp, vrf_id, __func__); |
27fd8827 | 148 | |
dca8cfcc | 149 | vrrp_if_down(ifp); |
b6029d6a QY |
150 | |
151 | return 0; | |
152 | } | |
153 | ||
b6029d6a QY |
154 | static int vrrp_zebra_if_address_add(int command, struct zclient *zclient, |
155 | zebra_size_t length, vrf_id_t vrf_id) | |
156 | { | |
157 | struct connected *c; | |
158 | ||
159 | /* | |
160 | * zebra api notifies address adds/dels events by using the same call | |
161 | * interface_add_read below, see comments in lib/zclient.c | |
162 | * | |
163 | * zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_ADD, ...) | |
164 | * will add address to interface list by calling | |
165 | * connected_add_by_prefix() | |
166 | */ | |
167 | c = zebra_interface_address_read(command, zclient->ibuf, vrf_id); | |
dca8cfcc | 168 | |
b6029d6a QY |
169 | if (!c) |
170 | return 0; | |
171 | ||
dca8cfcc QY |
172 | vrrp_zebra_debug_if_state(c->ifp, vrf_id, __func__); |
173 | vrrp_zebra_debug_if_dump_address(c->ifp, __func__); | |
b6029d6a | 174 | |
dca8cfcc | 175 | vrrp_if_address_add(c->ifp); |
b6029d6a QY |
176 | |
177 | return 0; | |
178 | } | |
179 | ||
180 | static int vrrp_zebra_if_address_del(int command, struct zclient *client, | |
181 | zebra_size_t length, vrf_id_t vrf_id) | |
182 | { | |
183 | struct connected *c; | |
184 | ||
185 | /* | |
186 | * zebra api notifies address adds/dels events by using the same call | |
187 | * interface_add_read below, see comments in lib/zclient.c | |
188 | * | |
189 | * zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_DELETE, ...) | |
190 | * will remove address from interface list by calling | |
191 | * connected_delete_by_prefix() | |
192 | */ | |
193 | c = zebra_interface_address_read(command, client->ibuf, vrf_id); | |
dca8cfcc | 194 | |
b6029d6a QY |
195 | if (!c) |
196 | return 0; | |
197 | ||
dca8cfcc QY |
198 | vrrp_zebra_debug_if_state(c->ifp, vrf_id, __func__); |
199 | vrrp_zebra_debug_if_dump_address(c->ifp, __func__); | |
200 | ||
6e93585e | 201 | vrrp_if_address_del(c->ifp); |
27fd8827 | 202 | |
b6029d6a QY |
203 | return 0; |
204 | } | |
5435a2bf | 205 | |
f3fe0047 QY |
206 | void vrrp_zebra_radv_set(struct vrrp_router *r, bool enable) |
207 | { | |
dca8cfcc QY |
208 | DEBUGD(&vrrp_dbg_zebra, |
209 | VRRP_LOGPFX VRRP_LOGPFX_VRID | |
210 | "Requesting Zebra to turn router advertisements %s for %s", | |
211 | r->vr->vrid, enable ? "on" : "off", r->mvl_ifp->name); | |
212 | ||
f3fe0047 QY |
213 | zclient_send_interface_radv_req(zclient, VRF_DEFAULT, r->mvl_ifp, |
214 | enable, VRRP_RADV_INT); | |
215 | } | |
216 | ||
c3bd894e QY |
217 | int vrrp_zclient_send_interface_protodown(struct interface *ifp, bool down) |
218 | { | |
dca8cfcc QY |
219 | DEBUGD(&vrrp_dbg_zebra, |
220 | VRRP_LOGPFX "Requesting Zebra to set %s protodown %s", ifp->name, | |
221 | down ? "on" : "off"); | |
222 | ||
c3bd894e QY |
223 | return zclient_send_interface_protodown(zclient, VRF_DEFAULT, ifp, |
224 | down); | |
225 | } | |
226 | ||
138c5a74 DS |
227 | int vrrp_ifp_up(struct interface *ifp) |
228 | { | |
229 | return 0; | |
230 | } | |
231 | ||
232 | int vrrp_ifp_down(struct interface *ifp) | |
233 | { | |
234 | return 0; | |
235 | } | |
236 | ||
237 | int vrrp_ifp_destroy(struct interface *ifp) | |
238 | { | |
239 | return 0; | |
240 | } | |
241 | ||
5435a2bf QY |
242 | void vrrp_zebra_init(void) |
243 | { | |
138c5a74 DS |
244 | if_zapi_callbacks(vrrp_ifp_create, vrrp_ifp_up, |
245 | vrrp_ifp_down, vrrp_ifp_destroy); | |
246 | ||
b6029d6a QY |
247 | /* Socket for receiving updates from Zebra daemon */ |
248 | zclient = zclient_new(master, &zclient_options_default); | |
5435a2bf | 249 | |
b6029d6a QY |
250 | zclient->zebra_connected = vrrp_zebra_connected; |
251 | zclient->router_id_update = vrrp_router_id_update_zebra; | |
b6029d6a QY |
252 | zclient->interface_delete = vrrp_zebra_if_del; |
253 | zclient->interface_up = vrrp_zebra_if_state_up; | |
254 | zclient->interface_down = vrrp_zebra_if_state_down; | |
255 | zclient->interface_address_add = vrrp_zebra_if_address_add; | |
256 | zclient->interface_address_delete = vrrp_zebra_if_address_del; | |
5435a2bf | 257 | |
4f576e75 | 258 | zclient_init(zclient, ZEBRA_ROUTE_VRRP, 0, &vrrp_privs); |
5435a2bf | 259 | |
b6029d6a QY |
260 | zlog_notice("%s: zclient socket initialized", __PRETTY_FUNCTION__); |
261 | } |