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7f57883e DS |
1 | /* |
2 | * Zebra connect library for EIGRP. | |
3 | * Copyright (C) 2013-2014 | |
4 | * Authors: | |
5 | * Donnie Savage | |
6 | * Jan Janovic | |
7 | * Matej Perina | |
8 | * Peter Orsag | |
9 | * Peter Paluch | |
10 | * | |
11 | * This file is part of GNU Zebra. | |
12 | * | |
13 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
14 | * under the terms of the GNU General Public License as published by the | |
15 | * Free Software Foundation; either version 2, or (at your option) any | |
16 | * later version. | |
17 | * | |
18 | * GNU Zebra is distributed in the hope that it will be useful, but | |
19 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
21 | * General Public License for more details. | |
22 | * | |
896014f4 DL |
23 | * You should have received a copy of the GNU General Public License along |
24 | * with this program; see the file COPYING; if not, write to the Free Software | |
25 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
7f57883e DS |
26 | */ |
27 | ||
28 | #include <zebra.h> | |
29 | ||
30 | #include "thread.h" | |
31 | #include "command.h" | |
32 | #include "network.h" | |
33 | #include "prefix.h" | |
34 | #include "routemap.h" | |
35 | #include "table.h" | |
36 | #include "stream.h" | |
37 | #include "memory.h" | |
38 | #include "zclient.h" | |
39 | #include "filter.h" | |
40 | #include "plist.h" | |
41 | #include "log.h" | |
42 | #include "nexthop.h" | |
43 | ||
44 | #include "eigrpd/eigrp_structs.h" | |
45 | #include "eigrpd/eigrpd.h" | |
46 | #include "eigrpd/eigrp_interface.h" | |
47 | #include "eigrpd/eigrp_neighbor.h" | |
48 | #include "eigrpd/eigrp_packet.h" | |
49 | #include "eigrpd/eigrp_zebra.h" | |
50 | #include "eigrpd/eigrp_vty.h" | |
51 | #include "eigrpd/eigrp_dump.h" | |
52 | #include "eigrpd/eigrp_network.h" | |
53 | #include "eigrpd/eigrp_topology.h" | |
54 | #include "eigrpd/eigrp_fsm.h" | |
55 | ||
d62a17ae | 56 | static int eigrp_interface_add(int, struct zclient *, zebra_size_t, vrf_id_t); |
57 | static int eigrp_interface_delete(int, struct zclient *, zebra_size_t, | |
58 | vrf_id_t); | |
59 | static int eigrp_interface_address_add(int, struct zclient *, zebra_size_t, | |
60 | vrf_id_t vrf_id); | |
61 | static int eigrp_interface_address_delete(int, struct zclient *, zebra_size_t, | |
62 | vrf_id_t vrf_id); | |
63 | static int eigrp_interface_state_up(int, struct zclient *, zebra_size_t, | |
64 | vrf_id_t vrf_id); | |
65 | static int eigrp_interface_state_down(int, struct zclient *, zebra_size_t, | |
66 | vrf_id_t vrf_id); | |
67 | static struct interface *zebra_interface_if_lookup(struct stream *); | |
68 | ||
74489921 RW |
69 | static int eigrp_zebra_read_route(int, struct zclient *, zebra_size_t, |
70 | vrf_id_t vrf_id); | |
7f57883e DS |
71 | |
72 | /* Zebra structure to hold current status. */ | |
73 | struct zclient *zclient = NULL; | |
74 | ||
75 | /* For registering threads. */ | |
76 | extern struct thread_master *master; | |
77 | struct in_addr router_id_zebra; | |
78 | ||
79 | /* Router-id update message from zebra. */ | |
d62a17ae | 80 | static int eigrp_router_id_update_zebra(int command, struct zclient *zclient, |
81 | zebra_size_t length, vrf_id_t vrf_id) | |
7f57883e | 82 | { |
d62a17ae | 83 | struct eigrp *eigrp; |
84 | struct prefix router_id; | |
85 | zebra_router_id_update_read(zclient->ibuf, &router_id); | |
7f57883e | 86 | |
d62a17ae | 87 | router_id_zebra = router_id.u.prefix4; |
7f57883e | 88 | |
d62a17ae | 89 | eigrp = eigrp_lookup(); |
7f57883e | 90 | |
d62a17ae | 91 | if (eigrp != NULL) |
92 | eigrp_router_id_update(eigrp); | |
7f57883e | 93 | |
d62a17ae | 94 | return 0; |
7f57883e DS |
95 | } |
96 | ||
28b11f81 DS |
97 | static int eigrp_zebra_route_notify_owner(int command, struct zclient *zclient, |
98 | zebra_size_t length, vrf_id_t vrf_id) | |
ca890872 DS |
99 | { |
100 | struct prefix p; | |
101 | enum zapi_route_notify_owner note; | |
28610f7e | 102 | uint32_t table; |
ca890872 | 103 | |
28610f7e | 104 | if (!zapi_route_notify_decode(zclient->ibuf, &p, &table, ¬e)) |
ca890872 DS |
105 | return -1; |
106 | ||
107 | return 0; | |
108 | } | |
109 | ||
d62a17ae | 110 | static void eigrp_zebra_connected(struct zclient *zclient) |
08ff1a68 | 111 | { |
d62a17ae | 112 | zclient_send_reg_requests(zclient, VRF_DEFAULT); |
08ff1a68 | 113 | } |
7f57883e | 114 | |
d62a17ae | 115 | void eigrp_zebra_init(void) |
7f57883e | 116 | { |
996c9314 | 117 | struct zclient_options opt = {.receive_notify = false}; |
ca890872 | 118 | |
26f63a1e | 119 | zclient = zclient_new(master, &opt); |
d62a17ae | 120 | |
342213ea | 121 | zclient_init(zclient, ZEBRA_ROUTE_EIGRP, 0, &eigrpd_privs); |
d62a17ae | 122 | zclient->zebra_connected = eigrp_zebra_connected; |
123 | zclient->router_id_update = eigrp_router_id_update_zebra; | |
124 | zclient->interface_add = eigrp_interface_add; | |
125 | zclient->interface_delete = eigrp_interface_delete; | |
126 | zclient->interface_up = eigrp_interface_state_up; | |
127 | zclient->interface_down = eigrp_interface_state_down; | |
128 | zclient->interface_address_add = eigrp_interface_address_add; | |
129 | zclient->interface_address_delete = eigrp_interface_address_delete; | |
74489921 RW |
130 | zclient->redistribute_route_add = eigrp_zebra_read_route; |
131 | zclient->redistribute_route_del = eigrp_zebra_read_route; | |
28b11f81 | 132 | zclient->route_notify_owner = eigrp_zebra_route_notify_owner; |
7f57883e DS |
133 | } |
134 | ||
135 | ||
136 | /* Zebra route add and delete treatment. */ | |
74489921 RW |
137 | static int eigrp_zebra_read_route(int command, struct zclient *zclient, |
138 | zebra_size_t length, vrf_id_t vrf_id) | |
7f57883e | 139 | { |
74489921 | 140 | struct zapi_route api; |
d62a17ae | 141 | struct eigrp *eigrp; |
142 | ||
74489921 RW |
143 | if (zapi_route_decode(zclient->ibuf, &api) < 0) |
144 | return -1; | |
d62a17ae | 145 | |
74489921 | 146 | if (IPV4_NET127(ntohl(api.prefix.u.prefix4.s_addr))) |
d62a17ae | 147 | return 0; |
148 | ||
d62a17ae | 149 | eigrp = eigrp_lookup(); |
150 | if (eigrp == NULL) | |
151 | return 0; | |
152 | ||
74489921 | 153 | if (command == ZEBRA_REDISTRIBUTE_ROUTE_ADD) { |
d62a17ae | 154 | |
74489921 | 155 | } else /* if (command == ZEBRA_REDISTRIBUTE_ROUTE_DEL) */ |
d62a17ae | 156 | { |
157 | } | |
158 | ||
159 | return 0; | |
7f57883e DS |
160 | } |
161 | ||
162 | /* Inteface addition message from zebra. */ | |
d62a17ae | 163 | static int eigrp_interface_add(int command, struct zclient *zclient, |
164 | zebra_size_t length, vrf_id_t vrf_id) | |
7f57883e | 165 | { |
d62a17ae | 166 | struct interface *ifp; |
b748db67 | 167 | struct eigrp_interface *ei; |
7f57883e | 168 | |
d62a17ae | 169 | ifp = zebra_interface_add_read(zclient->ibuf, vrf_id); |
7f57883e | 170 | |
b748db67 DS |
171 | if (!ifp->info) |
172 | return 0; | |
7f57883e | 173 | |
b748db67 DS |
174 | ei = ifp->info; |
175 | ||
176 | ei->params.type = eigrp_default_iftype(ifp); | |
7f57883e | 177 | |
d62a17ae | 178 | eigrp_if_update(ifp); |
7f57883e | 179 | |
d62a17ae | 180 | return 0; |
7f57883e DS |
181 | } |
182 | ||
d62a17ae | 183 | static int eigrp_interface_delete(int command, struct zclient *zclient, |
184 | zebra_size_t length, vrf_id_t vrf_id) | |
7f57883e | 185 | { |
d62a17ae | 186 | struct interface *ifp; |
187 | struct stream *s; | |
d62a17ae | 188 | |
189 | s = zclient->ibuf; | |
190 | /* zebra_interface_state_read () updates interface structure in iflist | |
191 | */ | |
192 | ifp = zebra_interface_state_read(s, vrf_id); | |
193 | ||
194 | if (ifp == NULL) | |
195 | return 0; | |
196 | ||
197 | if (if_is_up(ifp)) | |
198 | zlog_warn("Zebra: got delete of %s, but interface is still up", | |
199 | ifp->name); | |
200 | ||
201 | if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE)) | |
202 | zlog_debug( | |
203 | "Zebra: interface delete %s index %d flags %llx metric %d mtu %d", | |
204 | ifp->name, ifp->ifindex, (unsigned long long)ifp->flags, | |
205 | ifp->metric, ifp->mtu); | |
206 | ||
b748db67 | 207 | if (ifp->info) |
996c9314 | 208 | eigrp_if_free(ifp->info, INTERFACE_DOWN_BY_ZEBRA); |
d62a17ae | 209 | |
ff880b78 | 210 | if_set_index(ifp, IFINDEX_INTERNAL); |
d62a17ae | 211 | return 0; |
7f57883e DS |
212 | } |
213 | ||
d62a17ae | 214 | static int eigrp_interface_address_add(int command, struct zclient *zclient, |
215 | zebra_size_t length, vrf_id_t vrf_id) | |
7f57883e | 216 | { |
d62a17ae | 217 | struct connected *c; |
7f57883e | 218 | |
d62a17ae | 219 | c = zebra_interface_address_read(command, zclient->ibuf, vrf_id); |
7f57883e | 220 | |
d62a17ae | 221 | if (c == NULL) |
222 | return 0; | |
7f57883e | 223 | |
d62a17ae | 224 | if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE)) { |
225 | char buf[128]; | |
226 | prefix2str(c->address, buf, sizeof(buf)); | |
227 | zlog_debug("Zebra: interface %s address add %s", c->ifp->name, | |
228 | buf); | |
229 | } | |
7f57883e | 230 | |
d62a17ae | 231 | eigrp_if_update(c->ifp); |
7f57883e | 232 | |
d62a17ae | 233 | return 0; |
7f57883e DS |
234 | } |
235 | ||
d62a17ae | 236 | static int eigrp_interface_address_delete(int command, struct zclient *zclient, |
237 | zebra_size_t length, vrf_id_t vrf_id) | |
7f57883e | 238 | { |
d62a17ae | 239 | struct connected *c; |
240 | struct interface *ifp; | |
241 | struct eigrp_interface *ei; | |
7f57883e | 242 | |
d62a17ae | 243 | c = zebra_interface_address_read(command, zclient->ibuf, vrf_id); |
7f57883e | 244 | |
d62a17ae | 245 | if (c == NULL) |
246 | return 0; | |
7f57883e | 247 | |
d62a17ae | 248 | if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE)) { |
249 | char buf[128]; | |
250 | prefix2str(c->address, buf, sizeof(buf)); | |
251 | zlog_debug("Zebra: interface %s address delete %s", | |
252 | c->ifp->name, buf); | |
253 | } | |
7f57883e | 254 | |
d62a17ae | 255 | ifp = c->ifp; |
b748db67 DS |
256 | ei = ifp->info; |
257 | if (!ei) | |
d62a17ae | 258 | return 0; |
7f57883e | 259 | |
d62a17ae | 260 | /* Call interface hook functions to clean up */ |
261 | eigrp_if_free(ei, INTERFACE_DOWN_BY_ZEBRA); | |
7f57883e | 262 | |
d62a17ae | 263 | connected_free(c); |
7f57883e | 264 | |
d62a17ae | 265 | return 0; |
7f57883e DS |
266 | } |
267 | ||
d62a17ae | 268 | static int eigrp_interface_state_up(int command, struct zclient *zclient, |
269 | zebra_size_t length, vrf_id_t vrf_id) | |
7f57883e | 270 | { |
d62a17ae | 271 | struct interface *ifp; |
7f57883e | 272 | |
d62a17ae | 273 | ifp = zebra_interface_if_lookup(zclient->ibuf); |
7f57883e | 274 | |
d62a17ae | 275 | if (ifp == NULL) |
276 | return 0; | |
7f57883e | 277 | |
d62a17ae | 278 | /* Interface is already up. */ |
279 | if (if_is_operative(ifp)) { | |
280 | /* Temporarily keep ifp values. */ | |
281 | struct interface if_tmp; | |
282 | memcpy(&if_tmp, ifp, sizeof(struct interface)); | |
7f57883e | 283 | |
d62a17ae | 284 | zebra_interface_if_set_value(zclient->ibuf, ifp); |
7f57883e | 285 | |
d62a17ae | 286 | if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE)) |
287 | zlog_debug("Zebra: Interface[%s] state update.", | |
288 | ifp->name); | |
7f57883e | 289 | |
d62a17ae | 290 | if (if_tmp.bandwidth != ifp->bandwidth) { |
291 | if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE)) | |
292 | zlog_debug( | |
293 | "Zebra: Interface[%s] bandwidth change %d -> %d.", | |
294 | ifp->name, if_tmp.bandwidth, | |
295 | ifp->bandwidth); | |
7f57883e | 296 | |
d62a17ae | 297 | // eigrp_if_recalculate_output_cost (ifp); |
298 | } | |
7f57883e | 299 | |
d62a17ae | 300 | if (if_tmp.mtu != ifp->mtu) { |
301 | if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE)) | |
302 | zlog_debug( | |
303 | "Zebra: Interface[%s] MTU change %u -> %u.", | |
304 | ifp->name, if_tmp.mtu, ifp->mtu); | |
7f57883e | 305 | |
d62a17ae | 306 | /* Must reset the interface (simulate down/up) when MTU |
307 | * changes. */ | |
308 | eigrp_if_reset(ifp); | |
309 | } | |
310 | return 0; | |
311 | } | |
7f57883e | 312 | |
d62a17ae | 313 | zebra_interface_if_set_value(zclient->ibuf, ifp); |
7f57883e | 314 | |
d62a17ae | 315 | if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE)) |
316 | zlog_debug("Zebra: Interface[%s] state change to up.", | |
317 | ifp->name); | |
7f57883e | 318 | |
b748db67 DS |
319 | if (ifp->info) |
320 | eigrp_if_up(ifp->info); | |
7f57883e | 321 | |
d62a17ae | 322 | return 0; |
7f57883e DS |
323 | } |
324 | ||
d62a17ae | 325 | static int eigrp_interface_state_down(int command, struct zclient *zclient, |
326 | zebra_size_t length, vrf_id_t vrf_id) | |
7f57883e | 327 | { |
d62a17ae | 328 | struct interface *ifp; |
7f57883e | 329 | |
d62a17ae | 330 | ifp = zebra_interface_state_read(zclient->ibuf, vrf_id); |
7f57883e | 331 | |
d62a17ae | 332 | if (ifp == NULL) |
333 | return 0; | |
7f57883e | 334 | |
d62a17ae | 335 | if (IS_DEBUG_EIGRP(zebra, ZEBRA_INTERFACE)) |
336 | zlog_debug("Zebra: Interface[%s] state change to down.", | |
337 | ifp->name); | |
7f57883e | 338 | |
b748db67 DS |
339 | if (ifp->info) |
340 | eigrp_if_down(ifp->info); | |
7f57883e | 341 | |
d62a17ae | 342 | return 0; |
7f57883e DS |
343 | } |
344 | ||
d62a17ae | 345 | static struct interface *zebra_interface_if_lookup(struct stream *s) |
7f57883e | 346 | { |
d62a17ae | 347 | char ifname_tmp[INTERFACE_NAMSIZ]; |
7f57883e | 348 | |
d62a17ae | 349 | /* Read interface name. */ |
350 | stream_get(ifname_tmp, s, INTERFACE_NAMSIZ); | |
7f57883e | 351 | |
d62a17ae | 352 | /* And look it up. */ |
bcc24579 | 353 | return if_lookup_by_name(ifname_tmp, VRF_DEFAULT); |
7f57883e DS |
354 | } |
355 | ||
836aad7e | 356 | void eigrp_zebra_route_add(struct prefix *p, struct list *successors) |
7f57883e | 357 | { |
8fb753e3 RW |
358 | struct zapi_route api; |
359 | struct zapi_nexthop *api_nh; | |
255ab940 | 360 | struct eigrp_nexthop_entry *te; |
d62a17ae | 361 | struct listnode *node; |
8fb753e3 | 362 | int count = 0; |
d62a17ae | 363 | |
d00061ea RW |
364 | if (!zclient->redist[AFI_IP][ZEBRA_ROUTE_EIGRP]) |
365 | return; | |
366 | ||
8fb753e3 RW |
367 | memset(&api, 0, sizeof(api)); |
368 | api.vrf_id = VRF_DEFAULT; | |
369 | api.type = ZEBRA_ROUTE_EIGRP; | |
370 | api.safi = SAFI_UNICAST; | |
371 | memcpy(&api.prefix, p, sizeof(*p)); | |
d00061ea | 372 | |
8fb753e3 | 373 | SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP); |
d00061ea RW |
374 | |
375 | /* Nexthop, ifindex, distance and metric information. */ | |
376 | for (ALL_LIST_ELEMENTS_RO(successors, node, te)) { | |
a74e593b RW |
377 | if (count >= MULTIPATH_NUM) |
378 | break; | |
8fb753e3 | 379 | api_nh = &api.nexthops[count]; |
4a7371e9 | 380 | api_nh->vrf_id = VRF_DEFAULT; |
d00061ea | 381 | if (te->adv_router->src.s_addr) { |
8fb753e3 RW |
382 | api_nh->gate.ipv4 = te->adv_router->src; |
383 | api_nh->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
d00061ea | 384 | } else |
8fb753e3 RW |
385 | api_nh->type = NEXTHOP_TYPE_IFINDEX; |
386 | api_nh->ifindex = te->ei->ifp->ifindex; | |
387 | ||
388 | count++; | |
d00061ea | 389 | } |
a74e593b | 390 | api.nexthop_num = count; |
d62a17ae | 391 | |
d00061ea | 392 | if (IS_DEBUG_EIGRP(zebra, ZEBRA_REDISTRIBUTE)) { |
836aad7e DS |
393 | char buf[2][PREFIX_STRLEN]; |
394 | zlog_debug("Zebra: Route add %s nexthop %s", | |
395 | prefix2str(p, buf[0], PREFIX_STRLEN), | |
396 | inet_ntop(AF_INET, 0, buf[1], PREFIX_STRLEN)); | |
d00061ea | 397 | } |
d62a17ae | 398 | |
8fb753e3 | 399 | zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api); |
7f57883e DS |
400 | } |
401 | ||
836aad7e | 402 | void eigrp_zebra_route_delete(struct prefix *p) |
7f57883e | 403 | { |
8fb753e3 | 404 | struct zapi_route api; |
d62a17ae | 405 | |
d00061ea RW |
406 | if (!zclient->redist[AFI_IP][ZEBRA_ROUTE_EIGRP]) |
407 | return; | |
408 | ||
8fb753e3 | 409 | memset(&api, 0, sizeof(api)); |
d00061ea RW |
410 | api.vrf_id = VRF_DEFAULT; |
411 | api.type = ZEBRA_ROUTE_EIGRP; | |
d00061ea | 412 | api.safi = SAFI_UNICAST; |
8fb753e3 RW |
413 | memcpy(&api.prefix, p, sizeof(*p)); |
414 | zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api); | |
d00061ea RW |
415 | |
416 | if (IS_DEBUG_EIGRP(zebra, ZEBRA_REDISTRIBUTE)) { | |
836aad7e DS |
417 | char buf[PREFIX_STRLEN]; |
418 | zlog_debug("Zebra: Route del %s", | |
419 | prefix2str(p, buf, PREFIX_STRLEN)); | |
d62a17ae | 420 | } |
421 | ||
422 | return; | |
7f57883e DS |
423 | } |
424 | ||
d62a17ae | 425 | int eigrp_is_type_redistributed(int type) |
7f57883e | 426 | { |
d62a17ae | 427 | return ((DEFAULT_ROUTE_TYPE(type)) |
428 | ? vrf_bitmap_check(zclient->default_information, | |
429 | VRF_DEFAULT) | |
430 | : vrf_bitmap_check(zclient->redist[AFI_IP][type], | |
431 | VRF_DEFAULT)); | |
7f57883e DS |
432 | } |
433 | ||
d62a17ae | 434 | int eigrp_redistribute_set(struct eigrp *eigrp, int type, |
435 | struct eigrp_metrics metric) | |
7f57883e DS |
436 | { |
437 | ||
d62a17ae | 438 | if (eigrp_is_type_redistributed(type)) { |
439 | if (eigrp_metrics_is_same(metric, eigrp->dmetric[type])) { | |
440 | eigrp->dmetric[type] = metric; | |
441 | } | |
7f57883e | 442 | |
d62a17ae | 443 | eigrp_external_routes_refresh(eigrp, type); |
7f57883e | 444 | |
d62a17ae | 445 | // if (IS_DEBUG_EIGRP(zebra, ZEBRA_REDISTRIBUTE)) |
446 | // zlog_debug ("Redistribute[%s]: Refresh Type[%d], | |
447 | // Metric[%d]", | |
448 | // eigrp_redist_string(type), | |
449 | // metric_type (eigrp, type), metric_value | |
450 | // (eigrp, type)); | |
451 | return CMD_SUCCESS; | |
452 | } | |
7f57883e | 453 | |
d62a17ae | 454 | eigrp->dmetric[type] = metric; |
7f57883e | 455 | |
d62a17ae | 456 | zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP, type, 0, |
457 | VRF_DEFAULT); | |
7f57883e | 458 | |
d62a17ae | 459 | ++eigrp->redistribute; |
7f57883e | 460 | |
d62a17ae | 461 | return CMD_SUCCESS; |
7f57883e DS |
462 | } |
463 | ||
d62a17ae | 464 | int eigrp_redistribute_unset(struct eigrp *eigrp, int type) |
7f57883e DS |
465 | { |
466 | ||
d62a17ae | 467 | if (eigrp_is_type_redistributed(type)) { |
468 | memset(&eigrp->dmetric[type], 0, sizeof(struct eigrp_metrics)); | |
469 | zclient_redistribute(ZEBRA_REDISTRIBUTE_DELETE, zclient, AFI_IP, | |
470 | type, 0, VRF_DEFAULT); | |
471 | --eigrp->redistribute; | |
472 | } | |
7f57883e | 473 | |
d62a17ae | 474 | return CMD_SUCCESS; |
7f57883e | 475 | } |