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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
5c79bd79 | 2 | /*** |
810adae9 | 3 | Copyright © 2014 Intel Corporation. All rights reserved. |
5c79bd79 PF |
4 | ***/ |
5 | ||
6 | #include <netinet/ether.h> | |
7 | #include <linux/if.h> | |
76c3246d | 8 | #include "sd-radv.h" |
5c79bd79 | 9 | |
5c79bd79 PF |
10 | #include "sd-dhcp6-client.h" |
11 | ||
76c3246d | 12 | #include "hashmap.h" |
8006aa32 | 13 | #include "hostname-util.h" |
07630cea | 14 | #include "network-internal.h" |
23f53b99 TG |
15 | #include "networkd-link.h" |
16 | #include "networkd-manager.h" | |
76c3246d PF |
17 | #include "siphash24.h" |
18 | #include "string-util.h" | |
19 | #include "radv-internal.h" | |
07630cea | 20 | |
be3a09b7 PF |
21 | static int dhcp6_lease_address_acquired(sd_dhcp6_client *client, Link *link); |
22 | ||
03d4fc2e PF |
23 | static bool dhcp6_get_prefix_delegation(Link *link) { |
24 | if (!link->network) | |
103b81ee | 25 | return false; |
103b81ee | 26 | |
a9eea606 YW |
27 | return IN_SET(link->network->router_prefix_delegation, |
28 | RADV_PREFIX_DELEGATION_DHCP6, | |
29 | RADV_PREFIX_DELEGATION_BOTH); | |
103b81ee PF |
30 | } |
31 | ||
32 | static bool dhcp6_enable_prefix_delegation(Link *dhcp6_link) { | |
33 | Manager *manager; | |
34 | Link *l; | |
35 | Iterator i; | |
36 | ||
37 | assert(dhcp6_link); | |
38 | ||
39 | manager = dhcp6_link->manager; | |
40 | assert(manager); | |
41 | ||
42 | HASHMAP_FOREACH(l, manager->links, i) { | |
43 | if (l == dhcp6_link) | |
44 | continue; | |
45 | ||
03d4fc2e | 46 | if (!dhcp6_get_prefix_delegation(l)) |
103b81ee PF |
47 | continue; |
48 | ||
49 | return true; | |
50 | } | |
51 | ||
52 | return false; | |
53 | } | |
54 | ||
c62c4628 PF |
55 | static int dhcp6_lease_information_acquired(sd_dhcp6_client *client, |
56 | Link *link) { | |
57 | return 0; | |
58 | } | |
59 | ||
76c3246d PF |
60 | static int dhcp6_pd_prefix_assign(Link *link, struct in6_addr *prefix, |
61 | uint8_t prefix_len, | |
62 | uint32_t lifetime_preferred, | |
63 | uint32_t lifetime_valid) { | |
64 | sd_radv *radv = link->radv; | |
65 | int r; | |
66 | _cleanup_(sd_radv_prefix_unrefp) sd_radv_prefix *p = NULL; | |
67 | ||
68 | r = sd_radv_prefix_new(&p); | |
69 | if (r < 0) | |
70 | return r; | |
71 | ||
72 | r = sd_radv_prefix_set_prefix(p, prefix, prefix_len); | |
73 | if (r < 0) | |
74 | return r; | |
75 | ||
76 | r = sd_radv_prefix_set_preferred_lifetime(p, lifetime_preferred); | |
77 | if (r < 0) | |
78 | return r; | |
79 | ||
80 | r = sd_radv_prefix_set_valid_lifetime(p, lifetime_valid); | |
81 | if (r < 0) | |
82 | return r; | |
83 | ||
84 | r = sd_radv_stop(radv); | |
85 | if (r < 0) | |
86 | return r; | |
87 | ||
88 | r = sd_radv_add_prefix(radv, p, true); | |
89 | if (r < 0 && r != -EEXIST) | |
90 | return r; | |
91 | ||
92 | r = manager_dhcp6_prefix_add(link->manager, &p->opt.in6_addr, link); | |
93 | if (r < 0) | |
94 | return r; | |
95 | ||
96 | return sd_radv_start(radv); | |
97 | } | |
98 | ||
302a796f | 99 | static int dhcp6_route_remove_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) { |
494c868d PF |
100 | int r; |
101 | ||
1046bf9b YW |
102 | assert(link); |
103 | ||
494c868d PF |
104 | r = sd_netlink_message_get_errno(m); |
105 | if (r < 0) | |
1046bf9b | 106 | log_link_debug_errno(link, r, "Received error on unreachable route removal for DHCPv6 delegated subnetl: %m"); |
494c868d | 107 | |
0ae286e6 | 108 | return 1; |
494c868d PF |
109 | } |
110 | ||
65dd5e31 | 111 | int dhcp6_lease_pd_prefix_lost(sd_dhcp6_client *client, Link* link) { |
494c868d PF |
112 | int r; |
113 | sd_dhcp6_lease *lease; | |
114 | union in_addr_union pd_prefix; | |
115 | uint8_t pd_prefix_len; | |
116 | uint32_t lifetime_preferred, lifetime_valid; | |
117 | ||
118 | r = sd_dhcp6_client_get_lease(client, &lease); | |
119 | if (r < 0) | |
120 | return r; | |
121 | ||
494c868d PF |
122 | sd_dhcp6_lease_reset_pd_prefix_iter(lease); |
123 | ||
124 | while (sd_dhcp6_lease_get_pd(lease, &pd_prefix.in6, &pd_prefix_len, | |
125 | &lifetime_preferred, | |
126 | &lifetime_valid) >= 0) { | |
127 | _cleanup_free_ char *buf = NULL; | |
dd5ab7d9 | 128 | _cleanup_free_ Route *route = NULL; |
494c868d PF |
129 | |
130 | if (pd_prefix_len > 64) | |
131 | continue; | |
132 | ||
133 | (void) in_addr_to_string(AF_INET6, &pd_prefix, &buf); | |
134 | ||
135 | if (pd_prefix_len < 64) { | |
136 | r = route_new(&route); | |
137 | if (r < 0) { | |
138 | log_link_warning_errno(link, r, "Cannot create unreachable route to delete for DHCPv6 delegated subnet %s/%u: %m", | |
139 | strnull(buf), | |
140 | pd_prefix_len); | |
141 | continue; | |
142 | } | |
143 | ||
144 | route_add(link, AF_INET6, &pd_prefix, pd_prefix_len, | |
145 | 0, 0, 0, &route); | |
146 | route_update(route, NULL, 0, NULL, NULL, 0, 0, | |
147 | RTN_UNREACHABLE); | |
148 | ||
c8ee637e | 149 | r = route_remove(route, link, dhcp6_route_remove_handler); |
494c868d PF |
150 | if (r < 0) { |
151 | (void) in_addr_to_string(AF_INET6, | |
152 | &pd_prefix, &buf); | |
153 | ||
154 | log_link_warning_errno(link, r, "Cannot delete unreachable route for DHCPv6 delegated subnet %s/%u: %m", | |
155 | strnull(buf), | |
156 | pd_prefix_len); | |
dd5ab7d9 | 157 | |
494c868d PF |
158 | continue; |
159 | } | |
494c868d PF |
160 | |
161 | log_link_debug(link, "Removing unreachable route %s/%u", | |
162 | strnull(buf), pd_prefix_len); | |
163 | } | |
164 | } | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
76c3246d PF |
169 | static int dhcp6_pd_prefix_distribute(Link *dhcp6_link, Iterator *i, |
170 | struct in6_addr *pd_prefix, | |
171 | uint8_t pd_prefix_len, | |
172 | uint32_t lifetime_preferred, | |
173 | uint32_t lifetime_valid) { | |
174 | Link *link; | |
175 | Manager *manager = dhcp6_link->manager; | |
176 | union in_addr_union prefix; | |
9fb96abd | 177 | uint64_t n_prefixes, n_used = 0; |
76c3246d | 178 | _cleanup_free_ char *buf = NULL; |
eb75b919 | 179 | _cleanup_free_ char *assigned_buf = NULL; |
76c3246d PF |
180 | int r; |
181 | ||
182 | assert(manager); | |
183 | assert(pd_prefix_len <= 64); | |
184 | ||
185 | prefix.in6 = *pd_prefix; | |
186 | ||
187 | r = in_addr_mask(AF_INET6, &prefix, pd_prefix_len); | |
188 | if (r < 0) | |
189 | return r; | |
190 | ||
9fb96abd | 191 | n_prefixes = UINT64_C(1) << (64 - pd_prefix_len); |
76c3246d PF |
192 | |
193 | (void) in_addr_to_string(AF_INET6, &prefix, &buf); | |
9fb96abd | 194 | log_link_debug(dhcp6_link, "Assigning up to %" PRIu64 " prefixes from %s/%u", |
76c3246d PF |
195 | n_prefixes, strnull(buf), pd_prefix_len); |
196 | ||
197 | while (hashmap_iterate(manager->links, i, (void **)&link, NULL)) { | |
198 | Link *assigned_link; | |
199 | ||
200 | if (n_used == n_prefixes) { | |
9fb96abd | 201 | log_link_debug(dhcp6_link, "Assigned %" PRIu64 "/%" PRIu64 " prefixes from %s/%u", |
76c3246d PF |
202 | n_used, n_prefixes, strnull(buf), pd_prefix_len); |
203 | ||
204 | return -EAGAIN; | |
205 | } | |
206 | ||
207 | if (link == dhcp6_link) | |
208 | continue; | |
209 | ||
03d4fc2e | 210 | if (!dhcp6_get_prefix_delegation(link)) |
76c3246d PF |
211 | continue; |
212 | ||
213 | assigned_link = manager_dhcp6_prefix_get(manager, &prefix.in6); | |
214 | if (assigned_link != NULL && assigned_link != link) | |
215 | continue; | |
216 | ||
eb75b919 | 217 | (void) in_addr_to_string(AF_INET6, &prefix, &assigned_buf); |
76c3246d PF |
218 | r = dhcp6_pd_prefix_assign(link, &prefix.in6, 64, |
219 | lifetime_preferred, lifetime_valid); | |
220 | if (r < 0) { | |
eb75b919 | 221 | log_link_error_errno(link, r, "Unable to %s prefix %s/64 from %s/%u for link: %m", |
76c3246d | 222 | assigned_link ? "update": "assign", |
eb75b919 | 223 | strnull(assigned_buf), |
76c3246d PF |
224 | strnull(buf), pd_prefix_len); |
225 | ||
226 | if (assigned_link == NULL) | |
227 | continue; | |
228 | ||
229 | } else | |
eb75b919 PF |
230 | log_link_debug(link, "Assigned prefix %" PRIu64 "/%" PRIu64 " %s/64 from %s/%u to link", |
231 | n_used + 1, n_prefixes, | |
232 | strnull(assigned_buf), | |
233 | strnull(buf), pd_prefix_len); | |
76c3246d PF |
234 | |
235 | n_used++; | |
236 | ||
37f52406 | 237 | r = in_addr_prefix_next(AF_INET6, &prefix, 64); |
76c3246d PF |
238 | if (r < 0 && n_used < n_prefixes) |
239 | return r; | |
240 | } | |
241 | ||
494c868d PF |
242 | return 0; |
243 | } | |
26db55f3 | 244 | |
302a796f | 245 | static int dhcp6_route_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) { |
494c868d | 246 | int r; |
73922903 | 247 | |
1046bf9b YW |
248 | assert(link); |
249 | ||
494c868d PF |
250 | r = sd_netlink_message_get_errno(m); |
251 | if (r < 0 && r != -EEXIST) | |
1046bf9b | 252 | log_link_debug_errno(link, r, "Received error when adding unreachable route for DHCPv6 delegated subnet: %m"); |
73922903 | 253 | |
0ae286e6 | 254 | return 1; |
76c3246d PF |
255 | } |
256 | ||
494c868d | 257 | |
76c3246d PF |
258 | static int dhcp6_lease_pd_prefix_acquired(sd_dhcp6_client *client, Link *link) { |
259 | int r; | |
260 | sd_dhcp6_lease *lease; | |
494c868d | 261 | union in_addr_union pd_prefix; |
76c3246d PF |
262 | uint8_t pd_prefix_len; |
263 | uint32_t lifetime_preferred, lifetime_valid; | |
264 | _cleanup_free_ char *buf = NULL; | |
265 | Iterator i = ITERATOR_FIRST; | |
266 | ||
267 | r = sd_dhcp6_client_get_lease(client, &lease); | |
268 | if (r < 0) | |
269 | return r; | |
270 | ||
76c3246d PF |
271 | sd_dhcp6_lease_reset_pd_prefix_iter(lease); |
272 | ||
494c868d | 273 | while (sd_dhcp6_lease_get_pd(lease, &pd_prefix.in6, &pd_prefix_len, |
76c3246d PF |
274 | &lifetime_preferred, |
275 | &lifetime_valid) >= 0) { | |
276 | ||
277 | if (pd_prefix_len > 64) { | |
494c868d | 278 | (void) in_addr_to_string(AF_INET6, &pd_prefix, &buf); |
76c3246d PF |
279 | log_link_debug(link, "PD Prefix length > 64, ignoring prefix %s/%u", |
280 | strnull(buf), pd_prefix_len); | |
281 | continue; | |
282 | } | |
283 | ||
3ec8303f | 284 | if (pd_prefix_len < 48) { |
494c868d | 285 | (void) in_addr_to_string(AF_INET6, &pd_prefix, &buf); |
3ec8303f PF |
286 | log_link_warning(link, "PD Prefix length < 48, looks unusual %s/%u", |
287 | strnull(buf), pd_prefix_len); | |
288 | } | |
289 | ||
494c868d PF |
290 | if (pd_prefix_len < 64) { |
291 | Route *route = NULL; | |
292 | ||
293 | (void) in_addr_to_string(AF_INET6, &pd_prefix, &buf); | |
294 | ||
295 | r = route_new(&route); | |
296 | if (r < 0) { | |
297 | log_link_warning_errno(link, r, "Cannot create unreachable route for DHCPv6 delegated subnet %s/%u: %m", | |
298 | strnull(buf), | |
299 | pd_prefix_len); | |
300 | continue; | |
301 | } | |
302 | ||
303 | route_add(link, AF_INET6, &pd_prefix, pd_prefix_len, | |
304 | 0, 0, 0, &route); | |
305 | route_update(route, NULL, 0, NULL, NULL, 0, 0, | |
306 | RTN_UNREACHABLE); | |
307 | ||
c8ee637e | 308 | r = route_configure(route, link, dhcp6_route_handler); |
494c868d PF |
309 | if (r < 0) { |
310 | log_link_warning_errno(link, r, "Cannot configure unreachable route for delegated subnet %s/%u: %m", | |
311 | strnull(buf), | |
312 | pd_prefix_len); | |
313 | route_free(route); | |
314 | continue; | |
315 | } | |
494c868d PF |
316 | |
317 | route_free(route); | |
318 | ||
319 | log_link_debug(link, "Configuring unreachable route for %s/%u", | |
320 | strnull(buf), pd_prefix_len); | |
321 | ||
322 | } else | |
323 | log_link_debug(link, "Not adding a blocking route since distributed prefix is /64"); | |
324 | ||
325 | r = dhcp6_pd_prefix_distribute(link, &i, &pd_prefix.in6, | |
76c3246d PF |
326 | pd_prefix_len, |
327 | lifetime_preferred, | |
328 | lifetime_valid); | |
329 | if (r < 0 && r != -EAGAIN) | |
330 | return r; | |
331 | ||
332 | if (r >= 0) | |
333 | i = ITERATOR_FIRST; | |
334 | } | |
335 | ||
336 | return 0; | |
337 | } | |
338 | ||
10752343 PF |
339 | int dhcp6_request_prefix_delegation(Link *link) { |
340 | Link *l; | |
341 | Iterator i; | |
342 | ||
343 | assert_return(link, -EINVAL); | |
344 | assert_return(link->manager, -EOPNOTSUPP); | |
345 | ||
346 | if (dhcp6_get_prefix_delegation(link) <= 0) | |
347 | return 0; | |
348 | ||
349 | log_link_debug(link, "Requesting DHCPv6 prefixes to be delegated for new link"); | |
350 | ||
351 | HASHMAP_FOREACH(l, link->manager->links, i) { | |
352 | int r, enabled; | |
353 | ||
354 | if (l == link) | |
355 | continue; | |
356 | ||
357 | if (!l->dhcp6_client) | |
358 | continue; | |
359 | ||
360 | r = sd_dhcp6_client_get_prefix_delegation(l->dhcp6_client, &enabled); | |
361 | if (r < 0) { | |
362 | log_link_warning_errno(l, r, "Cannot get prefix delegation when adding new link"); | |
363 | continue; | |
364 | } | |
365 | ||
366 | if (enabled == 0) { | |
367 | r = sd_dhcp6_client_set_prefix_delegation(l->dhcp6_client, 1); | |
368 | if (r < 0) { | |
369 | log_link_warning_errno(l, r, "Cannot enable prefix delegation when adding new link"); | |
370 | continue; | |
371 | } | |
372 | } | |
373 | ||
374 | r = sd_dhcp6_client_is_running(l->dhcp6_client); | |
375 | if (r <= 0) | |
376 | continue; | |
377 | ||
378 | if (enabled != 0) { | |
379 | log_link_debug(l, "Requesting re-assignment of delegated prefixes after adding new link"); | |
380 | (void) dhcp6_lease_pd_prefix_acquired(l->dhcp6_client, l); | |
381 | ||
382 | continue; | |
383 | } | |
384 | ||
385 | r = sd_dhcp6_client_stop(l->dhcp6_client); | |
386 | if (r < 0) { | |
387 | log_link_warning_errno(l, r, "Cannot stop DHCPv6 prefix delegation client after adding new link"); | |
388 | continue; | |
389 | } | |
390 | ||
391 | r = sd_dhcp6_client_start(l->dhcp6_client); | |
392 | if (r < 0) { | |
393 | log_link_warning_errno(l, r, "Cannot restart DHCPv6 prefix delegation client after adding new link"); | |
394 | continue; | |
395 | } | |
396 | ||
397 | log_link_debug(l, "Restarted DHCPv6 client to acquire prefix delegations after adding new link"); | |
398 | } | |
399 | ||
400 | return 0; | |
401 | } | |
402 | ||
302a796f | 403 | static int dhcp6_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
c62c4628 PF |
404 | int r; |
405 | ||
406 | assert(link); | |
407 | ||
1c4baffc | 408 | r = sd_netlink_message_get_errno(m); |
c62c4628 | 409 | if (r < 0 && r != -EEXIST) { |
be3a09b7 PF |
410 | if (link->rtnl_extended_attrs) { |
411 | log_link_warning(link, "Could not set extended netlink attributes, reverting to fallback mechanism"); | |
412 | ||
413 | link->rtnl_extended_attrs = false; | |
414 | dhcp6_lease_address_acquired(link->dhcp6_client, link); | |
415 | ||
416 | return 1; | |
417 | } | |
418 | ||
e53fc357 | 419 | log_link_error_errno(link, r, "Could not set DHCPv6 address: %m"); |
c62c4628 PF |
420 | |
421 | link_enter_failed(link); | |
422 | ||
423 | } else if (r >= 0) | |
200a0868 | 424 | manager_rtnl_process_address(rtnl, m, link->manager); |
c62c4628 PF |
425 | |
426 | return 1; | |
427 | } | |
428 | ||
1e7a0e21 LP |
429 | static int dhcp6_address_change( |
430 | Link *link, | |
431 | struct in6_addr *ip6_addr, | |
432 | uint32_t lifetime_preferred, | |
433 | uint32_t lifetime_valid) { | |
434 | ||
8e766630 | 435 | _cleanup_(address_freep) Address *addr = NULL; |
1e7a0e21 LP |
436 | char buffer[INET6_ADDRSTRLEN]; |
437 | int r; | |
c62c4628 | 438 | |
f0213e37 | 439 | r = address_new(&addr); |
c62c4628 PF |
440 | if (r < 0) |
441 | return r; | |
442 | ||
443 | addr->family = AF_INET6; | |
444 | memcpy(&addr->in_addr.in6, ip6_addr, sizeof(*ip6_addr)); | |
851c9f82 PF |
445 | |
446 | addr->flags = IFA_F_NOPREFIXROUTE; | |
6d8f6b0b | 447 | addr->prefixlen = 128; |
c62c4628 PF |
448 | |
449 | addr->cinfo.ifa_prefered = lifetime_preferred; | |
450 | addr->cinfo.ifa_valid = lifetime_valid; | |
451 | ||
f2341e0a | 452 | log_link_info(link, |
1e7a0e21 LP |
453 | "DHCPv6 address %s/%d timeout preferred %d valid %d", |
454 | inet_ntop(AF_INET6, &addr->in_addr.in6, buffer, sizeof(buffer)), | |
f2341e0a | 455 | addr->prefixlen, lifetime_preferred, lifetime_valid); |
c62c4628 | 456 | |
66669078 | 457 | r = address_configure(addr, link, dhcp6_address_handler, true); |
c62c4628 | 458 | if (r < 0) |
f2341e0a | 459 | log_link_warning_errno(link, r, "Could not assign DHCPv6 address: %m"); |
c62c4628 PF |
460 | |
461 | return r; | |
462 | } | |
463 | ||
c62c4628 PF |
464 | static int dhcp6_lease_address_acquired(sd_dhcp6_client *client, Link *link) { |
465 | int r; | |
466 | sd_dhcp6_lease *lease; | |
467 | struct in6_addr ip6_addr; | |
468 | uint32_t lifetime_preferred, lifetime_valid; | |
c62c4628 PF |
469 | |
470 | r = sd_dhcp6_client_get_lease(client, &lease); | |
471 | if (r < 0) | |
472 | return r; | |
473 | ||
474 | sd_dhcp6_lease_reset_address_iter(lease); | |
475 | ||
476 | while (sd_dhcp6_lease_get_address(lease, &ip6_addr, | |
483d099e ZJS |
477 | &lifetime_preferred, |
478 | &lifetime_valid) >= 0) { | |
c62c4628 | 479 | |
6d8f6b0b | 480 | r = dhcp6_address_change(link, &ip6_addr, lifetime_preferred, lifetime_valid); |
c62c4628 PF |
481 | if (r < 0) |
482 | return r; | |
483 | } | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
5c79bd79 | 488 | static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) { |
c62c4628 | 489 | int r; |
5c79bd79 PF |
490 | Link *link = userdata; |
491 | ||
492 | assert(link); | |
493 | assert(link->network); | |
5c79bd79 PF |
494 | |
495 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
496 | return; | |
497 | ||
498 | switch(event) { | |
10c9ce61 DH |
499 | case SD_DHCP6_CLIENT_EVENT_STOP: |
500 | case SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE: | |
501 | case SD_DHCP6_CLIENT_EVENT_RETRANS_MAX: | |
3098562c TG |
502 | if (sd_dhcp6_client_get_lease(client, NULL) >= 0) |
503 | log_link_warning(link, "DHCPv6 lease lost"); | |
18d29550 | 504 | |
494c868d | 505 | (void) dhcp6_lease_pd_prefix_lost(client, link); |
76c3246d PF |
506 | (void) manager_dhcp6_prefix_remove_all(link->manager, link); |
507 | ||
18d29550 | 508 | link->dhcp6_configured = false; |
c62c4628 PF |
509 | break; |
510 | ||
10c9ce61 | 511 | case SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE: |
c62c4628 PF |
512 | r = dhcp6_lease_address_acquired(client, link); |
513 | if (r < 0) { | |
514 | link_enter_failed(link); | |
515 | return; | |
516 | } | |
517 | ||
76c3246d PF |
518 | r = dhcp6_lease_pd_prefix_acquired(client, link); |
519 | if (r < 0) | |
520 | log_link_debug(link, "DHCPv6 did not receive prefixes to delegate"); | |
521 | ||
4831981d | 522 | _fallthrough_; |
10c9ce61 | 523 | case SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST: |
c62c4628 PF |
524 | r = dhcp6_lease_information_acquired(client, link); |
525 | if (r < 0) { | |
526 | link_enter_failed(link); | |
527 | return; | |
528 | } | |
5c79bd79 | 529 | |
18d29550 | 530 | link->dhcp6_configured = true; |
5c79bd79 PF |
531 | break; |
532 | ||
533 | default: | |
534 | if (event < 0) | |
e53fc357 | 535 | log_link_warning_errno(link, event, "DHCPv6 error: %m"); |
5c79bd79 | 536 | else |
e53fc357 | 537 | log_link_warning(link, "DHCPv6 unknown event: %d", event); |
5c79bd79 PF |
538 | return; |
539 | } | |
18d29550 | 540 | |
8012cd39 | 541 | link_check_ready(link); |
5c79bd79 PF |
542 | } |
543 | ||
720bec40 | 544 | int dhcp6_request_address(Link *link, int ir) { |
125f20b4 | 545 | int r, inf_req, pd; |
7a695d8e | 546 | bool running; |
5c79bd79 | 547 | |
7a695d8e TG |
548 | assert(link); |
549 | assert(link->dhcp6_client); | |
125f20b4 | 550 | assert(link->network); |
720bec40 | 551 | assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0); |
85bd849f | 552 | |
7a695d8e TG |
553 | r = sd_dhcp6_client_is_running(link->dhcp6_client); |
554 | if (r < 0) | |
555 | return r; | |
556 | else | |
5d904a6a | 557 | running = r; |
e6604041 | 558 | |
125f20b4 PF |
559 | r = sd_dhcp6_client_get_prefix_delegation(link->dhcp6_client, &pd); |
560 | if (r < 0) | |
561 | return r; | |
562 | ||
563 | if (pd && ir && link->network->dhcp6_force_pd_other_information) { | |
564 | log_link_debug(link, "Enabling managed mode to request DHCPv6 PD with 'Other Information' set"); | |
565 | ||
566 | r = sd_dhcp6_client_set_address_request(link->dhcp6_client, | |
567 | false); | |
568 | if (r < 0 ) | |
569 | return r; | |
570 | ||
571 | ir = false; | |
572 | } | |
573 | ||
7a695d8e | 574 | if (running) { |
720bec40 TY |
575 | r = sd_dhcp6_client_get_information_request(link->dhcp6_client, &inf_req); |
576 | if (r < 0) | |
577 | return r; | |
578 | ||
579 | if (inf_req == ir) | |
580 | return 0; | |
581 | ||
7a695d8e TG |
582 | r = sd_dhcp6_client_stop(link->dhcp6_client); |
583 | if (r < 0) | |
584 | return r; | |
720bec40 TY |
585 | } else { |
586 | r = sd_dhcp6_client_set_local_address(link->dhcp6_client, &link->ipv6ll_address); | |
587 | if (r < 0) | |
588 | return r; | |
7a695d8e | 589 | } |
85bd849f | 590 | |
720bec40 TY |
591 | r = sd_dhcp6_client_set_information_request(link->dhcp6_client, ir); |
592 | if (r < 0) | |
593 | return r; | |
594 | ||
595 | r = sd_dhcp6_client_start(link->dhcp6_client); | |
7a695d8e TG |
596 | if (r < 0) |
597 | return r; | |
85bd849f | 598 | |
7a695d8e TG |
599 | return 0; |
600 | } | |
18d29550 | 601 | |
8006aa32 SA |
602 | static int dhcp6_set_hostname(sd_dhcp6_client *client, Link *link) { |
603 | _cleanup_free_ char *hostname = NULL; | |
604 | const char *hn; | |
605 | int r; | |
606 | ||
607 | assert(link); | |
608 | ||
609 | if (!link->network->dhcp_send_hostname) | |
610 | hn = NULL; | |
611 | else if (link->network->dhcp_hostname) | |
612 | hn = link->network->dhcp_hostname; | |
613 | else { | |
614 | r = gethostname_strict(&hostname); | |
615 | if (r < 0 && r != -ENXIO) /* ENXIO: no hostname set or hostname is "localhost" */ | |
616 | return r; | |
617 | ||
618 | hn = hostname; | |
619 | } | |
620 | ||
a8494759 YW |
621 | r = sd_dhcp6_client_set_fqdn(client, hn); |
622 | if (r == -EINVAL && hostname) | |
623 | /* Ignore error when the machine's hostname is not suitable to send in DHCP packet. */ | |
624 | log_link_warning_errno(link, r, "DHCP6 CLIENT: Failed to set hostname from kernel hostname, ignoring: %m"); | |
625 | else if (r < 0) | |
626 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set hostname: %m"); | |
627 | ||
628 | return 0; | |
8006aa32 SA |
629 | } |
630 | ||
7a695d8e | 631 | int dhcp6_configure(Link *link) { |
5bad7ebd | 632 | _cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL; |
8341a5c3 | 633 | const DUID *duid; |
fb5c8216 | 634 | int r; |
7a695d8e TG |
635 | |
636 | assert(link); | |
fb5c8216 | 637 | assert(link->network); |
7a695d8e | 638 | |
62379e88 TG |
639 | if (link->dhcp6_client) |
640 | return 0; | |
641 | ||
7a695d8e | 642 | r = sd_dhcp6_client_new(&client); |
5bad7ebd YW |
643 | if (r == -ENOMEM) |
644 | return log_oom(); | |
7a695d8e | 645 | if (r < 0) |
5bad7ebd | 646 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to create DHCP6 client: %m"); |
5c79bd79 | 647 | |
7a695d8e | 648 | r = sd_dhcp6_client_attach_event(client, NULL, 0); |
5c79bd79 | 649 | if (r < 0) |
5bad7ebd | 650 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to attach event: %m"); |
5c79bd79 | 651 | |
7a695d8e | 652 | r = sd_dhcp6_client_set_mac(client, |
5c79bd79 PF |
653 | (const uint8_t *) &link->mac, |
654 | sizeof (link->mac), ARPHRD_ETHER); | |
e6604041 | 655 | if (r < 0) |
5bad7ebd | 656 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set MAC address: %m"); |
5c79bd79 | 657 | |
8217ed5e TH |
658 | if (link->network->iaid_set) { |
659 | r = sd_dhcp6_client_set_iaid(client, link->network->iaid); | |
660 | if (r < 0) | |
661 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set IAID: %m"); | |
662 | } | |
413708d1 | 663 | |
f24648a6 | 664 | duid = link_get_duid(link); |
0cf7c3fd YW |
665 | if (duid->type == DUID_TYPE_LLT && duid->raw_data_len == 0) |
666 | r = sd_dhcp6_client_set_duid_llt(client, duid->llt_time); | |
667 | else | |
668 | r = sd_dhcp6_client_set_duid(client, | |
669 | duid->type, | |
670 | duid->raw_data_len > 0 ? duid->raw_data : NULL, | |
671 | duid->raw_data_len); | |
413708d1 | 672 | if (r < 0) |
5bad7ebd | 673 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set DUID: %m"); |
413708d1 | 674 | |
8006aa32 | 675 | r = dhcp6_set_hostname(client, link); |
8006aa32 | 676 | if (r < 0) |
a8494759 | 677 | return r; |
8006aa32 | 678 | |
2f8e7633 | 679 | r = sd_dhcp6_client_set_ifindex(client, link->ifindex); |
e6604041 | 680 | if (r < 0) |
5bad7ebd | 681 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set ifindex: %m"); |
5c79bd79 | 682 | |
fb5c8216 SS |
683 | if (link->network->rapid_commit) { |
684 | r = sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_RAPID_COMMIT); | |
685 | if (r < 0) | |
5bad7ebd | 686 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set request flag for rapid commit: %m"); |
fb5c8216 SS |
687 | } |
688 | ||
7a695d8e | 689 | r = sd_dhcp6_client_set_callback(client, dhcp6_handler, link); |
e6604041 | 690 | if (r < 0) |
5bad7ebd | 691 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set callback: %m"); |
5c79bd79 | 692 | |
103b81ee PF |
693 | if (dhcp6_enable_prefix_delegation(link)) { |
694 | r = sd_dhcp6_client_set_prefix_delegation(client, true); | |
695 | if (r < 0) | |
5bad7ebd | 696 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set prefix delegation: %m"); |
103b81ee PF |
697 | } |
698 | ||
5bad7ebd | 699 | link->dhcp6_client = TAKE_PTR(client); |
e6604041 | 700 | |
7a695d8e | 701 | return 0; |
5c79bd79 | 702 | } |