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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 | ||
26b6d034 PR |
59 | DEBUGD(&vrrp_dbg_zebra, "%s: interface %s address %pFX %s", |
60 | func, ifp->name, p, | |
dca8cfcc QY |
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 | ||
3c3c3252 | 92 | int vrrp_ifp_destroy(struct interface *ifp) |
b6029d6a | 93 | { |
3c3c3252 | 94 | vrrp_zebra_debug_if_state(ifp, ifp->vrf_id, __func__); |
27fd8827 | 95 | |
dca8cfcc | 96 | vrrp_if_del(ifp); |
b6029d6a QY |
97 | |
98 | return 0; | |
99 | } | |
100 | ||
ddbf3e60 | 101 | int vrrp_ifp_up(struct interface *ifp) |
b6029d6a | 102 | { |
ddbf3e60 | 103 | vrrp_zebra_debug_if_state(ifp, ifp->vrf_id, __func__); |
27fd8827 | 104 | |
dca8cfcc | 105 | vrrp_if_up(ifp); |
b6029d6a QY |
106 | |
107 | return 0; | |
108 | } | |
109 | ||
b0b69e59 | 110 | int vrrp_ifp_down(struct interface *ifp) |
b6029d6a | 111 | { |
b0b69e59 | 112 | vrrp_zebra_debug_if_state(ifp, ifp->vrf_id, __func__); |
27fd8827 | 113 | |
dca8cfcc | 114 | vrrp_if_down(ifp); |
b6029d6a QY |
115 | |
116 | return 0; | |
117 | } | |
118 | ||
b6029d6a QY |
119 | static int vrrp_zebra_if_address_add(int command, struct zclient *zclient, |
120 | zebra_size_t length, vrf_id_t vrf_id) | |
121 | { | |
122 | struct connected *c; | |
123 | ||
124 | /* | |
125 | * zebra api notifies address adds/dels events by using the same call | |
126 | * interface_add_read below, see comments in lib/zclient.c | |
127 | * | |
128 | * zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_ADD, ...) | |
129 | * will add address to interface list by calling | |
130 | * connected_add_by_prefix() | |
131 | */ | |
132 | c = zebra_interface_address_read(command, zclient->ibuf, vrf_id); | |
dca8cfcc | 133 | |
b6029d6a QY |
134 | if (!c) |
135 | return 0; | |
136 | ||
dca8cfcc QY |
137 | vrrp_zebra_debug_if_state(c->ifp, vrf_id, __func__); |
138 | vrrp_zebra_debug_if_dump_address(c->ifp, __func__); | |
b6029d6a | 139 | |
dca8cfcc | 140 | vrrp_if_address_add(c->ifp); |
b6029d6a QY |
141 | |
142 | return 0; | |
143 | } | |
144 | ||
145 | static int vrrp_zebra_if_address_del(int command, struct zclient *client, | |
146 | zebra_size_t length, vrf_id_t vrf_id) | |
147 | { | |
148 | struct connected *c; | |
149 | ||
150 | /* | |
151 | * zebra api notifies address adds/dels events by using the same call | |
152 | * interface_add_read below, see comments in lib/zclient.c | |
153 | * | |
154 | * zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_DELETE, ...) | |
155 | * will remove address from interface list by calling | |
156 | * connected_delete_by_prefix() | |
157 | */ | |
158 | c = zebra_interface_address_read(command, client->ibuf, vrf_id); | |
dca8cfcc | 159 | |
b6029d6a QY |
160 | if (!c) |
161 | return 0; | |
162 | ||
dca8cfcc QY |
163 | vrrp_zebra_debug_if_state(c->ifp, vrf_id, __func__); |
164 | vrrp_zebra_debug_if_dump_address(c->ifp, __func__); | |
165 | ||
6e93585e | 166 | vrrp_if_address_del(c->ifp); |
27fd8827 | 167 | |
b6029d6a QY |
168 | return 0; |
169 | } | |
5435a2bf | 170 | |
f3fe0047 QY |
171 | void vrrp_zebra_radv_set(struct vrrp_router *r, bool enable) |
172 | { | |
dca8cfcc QY |
173 | DEBUGD(&vrrp_dbg_zebra, |
174 | VRRP_LOGPFX VRRP_LOGPFX_VRID | |
175 | "Requesting Zebra to turn router advertisements %s for %s", | |
176 | r->vr->vrid, enable ? "on" : "off", r->mvl_ifp->name); | |
177 | ||
490810d5 | 178 | zclient_send_interface_radv_req(zclient, r->mvl_ifp->vrf_id, r->mvl_ifp, |
f3fe0047 QY |
179 | enable, VRRP_RADV_INT); |
180 | } | |
181 | ||
7cfdb485 | 182 | void vrrp_zclient_send_interface_protodown(struct interface *ifp, bool down) |
c3bd894e | 183 | { |
dca8cfcc QY |
184 | DEBUGD(&vrrp_dbg_zebra, |
185 | VRRP_LOGPFX "Requesting Zebra to set %s protodown %s", ifp->name, | |
186 | down ? "on" : "off"); | |
187 | ||
7cfdb485 | 188 | zclient_send_interface_protodown(zclient, ifp->vrf_id, ifp, down); |
c3bd894e QY |
189 | } |
190 | ||
5435a2bf QY |
191 | void vrrp_zebra_init(void) |
192 | { | |
138c5a74 DS |
193 | if_zapi_callbacks(vrrp_ifp_create, vrrp_ifp_up, |
194 | vrrp_ifp_down, vrrp_ifp_destroy); | |
195 | ||
b6029d6a QY |
196 | /* Socket for receiving updates from Zebra daemon */ |
197 | zclient = zclient_new(master, &zclient_options_default); | |
5435a2bf | 198 | |
b6029d6a QY |
199 | zclient->zebra_connected = vrrp_zebra_connected; |
200 | zclient->router_id_update = vrrp_router_id_update_zebra; | |
b6029d6a QY |
201 | zclient->interface_address_add = vrrp_zebra_if_address_add; |
202 | zclient->interface_address_delete = vrrp_zebra_if_address_del; | |
5435a2bf | 203 | |
4f576e75 | 204 | zclient_init(zclient, ZEBRA_ROUTE_VRRP, 0, &vrrp_privs); |
5435a2bf | 205 | |
15569c58 | 206 | zlog_notice("%s: zclient socket initialized", __func__); |
b6029d6a | 207 | } |