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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" |
aeed8332 | 14 | #include "missing_network.h" |
07630cea | 15 | #include "network-internal.h" |
23f53b99 TG |
16 | #include "networkd-link.h" |
17 | #include "networkd-manager.h" | |
76c3246d PF |
18 | #include "siphash24.h" |
19 | #include "string-util.h" | |
20 | #include "radv-internal.h" | |
07630cea | 21 | |
be3a09b7 PF |
22 | static int dhcp6_lease_address_acquired(sd_dhcp6_client *client, Link *link); |
23 | ||
03d4fc2e PF |
24 | static bool dhcp6_get_prefix_delegation(Link *link) { |
25 | if (!link->network) | |
103b81ee | 26 | return false; |
103b81ee | 27 | |
a9eea606 YW |
28 | return IN_SET(link->network->router_prefix_delegation, |
29 | RADV_PREFIX_DELEGATION_DHCP6, | |
30 | RADV_PREFIX_DELEGATION_BOTH); | |
103b81ee PF |
31 | } |
32 | ||
33 | static bool dhcp6_enable_prefix_delegation(Link *dhcp6_link) { | |
34 | Manager *manager; | |
35 | Link *l; | |
36 | Iterator i; | |
37 | ||
38 | assert(dhcp6_link); | |
39 | ||
40 | manager = dhcp6_link->manager; | |
41 | assert(manager); | |
42 | ||
43 | HASHMAP_FOREACH(l, manager->links, i) { | |
44 | if (l == dhcp6_link) | |
45 | continue; | |
46 | ||
03d4fc2e | 47 | if (!dhcp6_get_prefix_delegation(l)) |
103b81ee PF |
48 | continue; |
49 | ||
50 | return true; | |
51 | } | |
52 | ||
53 | return false; | |
54 | } | |
55 | ||
c62c4628 PF |
56 | static int dhcp6_lease_information_acquired(sd_dhcp6_client *client, |
57 | Link *link) { | |
58 | return 0; | |
59 | } | |
60 | ||
76c3246d PF |
61 | static int dhcp6_pd_prefix_assign(Link *link, struct in6_addr *prefix, |
62 | uint8_t prefix_len, | |
63 | uint32_t lifetime_preferred, | |
64 | uint32_t lifetime_valid) { | |
65 | sd_radv *radv = link->radv; | |
66 | int r; | |
67 | _cleanup_(sd_radv_prefix_unrefp) sd_radv_prefix *p = NULL; | |
68 | ||
69 | r = sd_radv_prefix_new(&p); | |
70 | if (r < 0) | |
71 | return r; | |
72 | ||
73 | r = sd_radv_prefix_set_prefix(p, prefix, prefix_len); | |
74 | if (r < 0) | |
75 | return r; | |
76 | ||
77 | r = sd_radv_prefix_set_preferred_lifetime(p, lifetime_preferred); | |
78 | if (r < 0) | |
79 | return r; | |
80 | ||
81 | r = sd_radv_prefix_set_valid_lifetime(p, lifetime_valid); | |
82 | if (r < 0) | |
83 | return r; | |
84 | ||
85 | r = sd_radv_stop(radv); | |
86 | if (r < 0) | |
87 | return r; | |
88 | ||
89 | r = sd_radv_add_prefix(radv, p, true); | |
90 | if (r < 0 && r != -EEXIST) | |
91 | return r; | |
92 | ||
2c448c8a | 93 | r = manager_dhcp6_prefix_add(link->manager, prefix, link); |
76c3246d PF |
94 | if (r < 0) |
95 | return r; | |
96 | ||
97 | return sd_radv_start(radv); | |
98 | } | |
99 | ||
302a796f | 100 | static int dhcp6_route_remove_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) { |
494c868d PF |
101 | int r; |
102 | ||
1046bf9b YW |
103 | assert(link); |
104 | ||
494c868d PF |
105 | r = sd_netlink_message_get_errno(m); |
106 | if (r < 0) | |
1046bf9b | 107 | log_link_debug_errno(link, r, "Received error on unreachable route removal for DHCPv6 delegated subnetl: %m"); |
494c868d | 108 | |
0ae286e6 | 109 | return 1; |
494c868d PF |
110 | } |
111 | ||
65dd5e31 | 112 | int dhcp6_lease_pd_prefix_lost(sd_dhcp6_client *client, Link* link) { |
494c868d PF |
113 | int r; |
114 | sd_dhcp6_lease *lease; | |
115 | union in_addr_union pd_prefix; | |
116 | uint8_t pd_prefix_len; | |
117 | uint32_t lifetime_preferred, lifetime_valid; | |
118 | ||
119 | r = sd_dhcp6_client_get_lease(client, &lease); | |
120 | if (r < 0) | |
121 | return r; | |
122 | ||
494c868d PF |
123 | sd_dhcp6_lease_reset_pd_prefix_iter(lease); |
124 | ||
125 | while (sd_dhcp6_lease_get_pd(lease, &pd_prefix.in6, &pd_prefix_len, | |
126 | &lifetime_preferred, | |
127 | &lifetime_valid) >= 0) { | |
128 | _cleanup_free_ char *buf = NULL; | |
ca7c792b | 129 | Route *route; |
494c868d | 130 | |
ca7c792b | 131 | if (pd_prefix_len >= 64) |
494c868d PF |
132 | continue; |
133 | ||
134 | (void) in_addr_to_string(AF_INET6, &pd_prefix, &buf); | |
135 | ||
ca7c792b YW |
136 | r = route_add(link, AF_INET6, &pd_prefix, pd_prefix_len, 0, 0, 0, &route); |
137 | if (r < 0) { | |
138 | log_link_warning_errno(link, r, "Failed to add unreachable route to delete for DHCPv6 delegated subnet %s/%u: %m", | |
139 | strnull(buf), | |
140 | pd_prefix_len); | |
141 | continue; | |
142 | } | |
dd5ab7d9 | 143 | |
ca7c792b | 144 | route_update(route, NULL, 0, NULL, NULL, 0, 0, RTN_UNREACHABLE); |
494c868d | 145 | |
ca7c792b YW |
146 | r = route_remove(route, link, dhcp6_route_remove_handler); |
147 | if (r < 0) { | |
148 | log_link_warning_errno(link, r, "Cannot delete unreachable route for DHCPv6 delegated subnet %s/%u: %m", | |
149 | strnull(buf), | |
150 | pd_prefix_len); | |
151 | continue; | |
494c868d | 152 | } |
ca7c792b YW |
153 | |
154 | log_link_debug(link, "Removing unreachable route %s/%u", | |
155 | strnull(buf), pd_prefix_len); | |
494c868d PF |
156 | } |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
76c3246d PF |
161 | static int dhcp6_pd_prefix_distribute(Link *dhcp6_link, Iterator *i, |
162 | struct in6_addr *pd_prefix, | |
163 | uint8_t pd_prefix_len, | |
164 | uint32_t lifetime_preferred, | |
165 | uint32_t lifetime_valid) { | |
166 | Link *link; | |
167 | Manager *manager = dhcp6_link->manager; | |
168 | union in_addr_union prefix; | |
9fb96abd | 169 | uint64_t n_prefixes, n_used = 0; |
76c3246d | 170 | _cleanup_free_ char *buf = NULL; |
eb75b919 | 171 | _cleanup_free_ char *assigned_buf = NULL; |
76c3246d PF |
172 | int r; |
173 | ||
174 | assert(manager); | |
175 | assert(pd_prefix_len <= 64); | |
176 | ||
177 | prefix.in6 = *pd_prefix; | |
178 | ||
179 | r = in_addr_mask(AF_INET6, &prefix, pd_prefix_len); | |
180 | if (r < 0) | |
181 | return r; | |
182 | ||
9fb96abd | 183 | n_prefixes = UINT64_C(1) << (64 - pd_prefix_len); |
76c3246d PF |
184 | |
185 | (void) in_addr_to_string(AF_INET6, &prefix, &buf); | |
9fb96abd | 186 | log_link_debug(dhcp6_link, "Assigning up to %" PRIu64 " prefixes from %s/%u", |
76c3246d PF |
187 | n_prefixes, strnull(buf), pd_prefix_len); |
188 | ||
189 | while (hashmap_iterate(manager->links, i, (void **)&link, NULL)) { | |
190 | Link *assigned_link; | |
191 | ||
192 | if (n_used == n_prefixes) { | |
9fb96abd | 193 | log_link_debug(dhcp6_link, "Assigned %" PRIu64 "/%" PRIu64 " prefixes from %s/%u", |
76c3246d PF |
194 | n_used, n_prefixes, strnull(buf), pd_prefix_len); |
195 | ||
196 | return -EAGAIN; | |
197 | } | |
198 | ||
199 | if (link == dhcp6_link) | |
200 | continue; | |
201 | ||
03d4fc2e | 202 | if (!dhcp6_get_prefix_delegation(link)) |
76c3246d PF |
203 | continue; |
204 | ||
205 | assigned_link = manager_dhcp6_prefix_get(manager, &prefix.in6); | |
2c448c8a | 206 | if (assigned_link && assigned_link != link) |
76c3246d PF |
207 | continue; |
208 | ||
eb75b919 | 209 | (void) in_addr_to_string(AF_INET6, &prefix, &assigned_buf); |
76c3246d PF |
210 | r = dhcp6_pd_prefix_assign(link, &prefix.in6, 64, |
211 | lifetime_preferred, lifetime_valid); | |
212 | if (r < 0) { | |
eb75b919 | 213 | log_link_error_errno(link, r, "Unable to %s prefix %s/64 from %s/%u for link: %m", |
76c3246d | 214 | assigned_link ? "update": "assign", |
eb75b919 | 215 | strnull(assigned_buf), |
76c3246d PF |
216 | strnull(buf), pd_prefix_len); |
217 | ||
4e361acc | 218 | if (!assigned_link) |
76c3246d PF |
219 | continue; |
220 | ||
221 | } else | |
eb75b919 PF |
222 | log_link_debug(link, "Assigned prefix %" PRIu64 "/%" PRIu64 " %s/64 from %s/%u to link", |
223 | n_used + 1, n_prefixes, | |
224 | strnull(assigned_buf), | |
225 | strnull(buf), pd_prefix_len); | |
76c3246d PF |
226 | |
227 | n_used++; | |
228 | ||
37f52406 | 229 | r = in_addr_prefix_next(AF_INET6, &prefix, 64); |
76c3246d PF |
230 | if (r < 0 && n_used < n_prefixes) |
231 | return r; | |
232 | } | |
233 | ||
494c868d PF |
234 | return 0; |
235 | } | |
26db55f3 | 236 | |
302a796f | 237 | static int dhcp6_route_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) { |
494c868d | 238 | int r; |
73922903 | 239 | |
1046bf9b YW |
240 | assert(link); |
241 | ||
494c868d PF |
242 | r = sd_netlink_message_get_errno(m); |
243 | if (r < 0 && r != -EEXIST) | |
1046bf9b | 244 | log_link_debug_errno(link, r, "Received error when adding unreachable route for DHCPv6 delegated subnet: %m"); |
73922903 | 245 | |
0ae286e6 | 246 | return 1; |
76c3246d PF |
247 | } |
248 | ||
249 | static int dhcp6_lease_pd_prefix_acquired(sd_dhcp6_client *client, Link *link) { | |
250 | int r; | |
251 | sd_dhcp6_lease *lease; | |
494c868d | 252 | union in_addr_union pd_prefix; |
76c3246d PF |
253 | uint8_t pd_prefix_len; |
254 | uint32_t lifetime_preferred, lifetime_valid; | |
76c3246d PF |
255 | Iterator i = ITERATOR_FIRST; |
256 | ||
257 | r = sd_dhcp6_client_get_lease(client, &lease); | |
258 | if (r < 0) | |
259 | return r; | |
260 | ||
76c3246d PF |
261 | sd_dhcp6_lease_reset_pd_prefix_iter(lease); |
262 | ||
494c868d | 263 | while (sd_dhcp6_lease_get_pd(lease, &pd_prefix.in6, &pd_prefix_len, |
76c3246d PF |
264 | &lifetime_preferred, |
265 | &lifetime_valid) >= 0) { | |
266 | ||
ca7c792b YW |
267 | _cleanup_free_ char *buf = NULL; |
268 | ||
269 | (void) in_addr_to_string(AF_INET6, &pd_prefix, &buf); | |
270 | ||
76c3246d PF |
271 | if (pd_prefix_len > 64) { |
272 | log_link_debug(link, "PD Prefix length > 64, ignoring prefix %s/%u", | |
273 | strnull(buf), pd_prefix_len); | |
274 | continue; | |
275 | } | |
276 | ||
ca7c792b | 277 | if (pd_prefix_len < 48) |
3ec8303f PF |
278 | log_link_warning(link, "PD Prefix length < 48, looks unusual %s/%u", |
279 | strnull(buf), pd_prefix_len); | |
3ec8303f | 280 | |
494c868d | 281 | if (pd_prefix_len < 64) { |
bdb9f580 | 282 | uint32_t table; |
ca7c792b | 283 | Route *route; |
494c868d | 284 | |
bdb9f580 YW |
285 | table = link_get_dhcp_route_table(link); |
286 | ||
57445b53 YW |
287 | r = route_add(link, AF_INET6, &pd_prefix, pd_prefix_len, 0, 0, table, &route); |
288 | if (r < 0) { | |
289 | log_link_warning_errno(link, r, "Failed to add unreachable route for DHCPv6 delegated subnet %s/%u: %m", | |
290 | strnull(buf), | |
291 | pd_prefix_len); | |
292 | continue; | |
293 | } | |
294 | ||
295 | route_update(route, NULL, 0, NULL, NULL, 0, 0, RTN_UNREACHABLE); | |
494c868d | 296 | |
c8ee637e | 297 | r = route_configure(route, link, dhcp6_route_handler); |
494c868d PF |
298 | if (r < 0) { |
299 | log_link_warning_errno(link, r, "Cannot configure unreachable route for delegated subnet %s/%u: %m", | |
300 | strnull(buf), | |
301 | pd_prefix_len); | |
494c868d PF |
302 | continue; |
303 | } | |
494c868d | 304 | |
494c868d PF |
305 | log_link_debug(link, "Configuring unreachable route for %s/%u", |
306 | strnull(buf), pd_prefix_len); | |
494c868d PF |
307 | } else |
308 | log_link_debug(link, "Not adding a blocking route since distributed prefix is /64"); | |
309 | ||
310 | r = dhcp6_pd_prefix_distribute(link, &i, &pd_prefix.in6, | |
76c3246d PF |
311 | pd_prefix_len, |
312 | lifetime_preferred, | |
313 | lifetime_valid); | |
314 | if (r < 0 && r != -EAGAIN) | |
315 | return r; | |
316 | ||
317 | if (r >= 0) | |
318 | i = ITERATOR_FIRST; | |
319 | } | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
10752343 PF |
324 | int dhcp6_request_prefix_delegation(Link *link) { |
325 | Link *l; | |
326 | Iterator i; | |
327 | ||
328 | assert_return(link, -EINVAL); | |
329 | assert_return(link->manager, -EOPNOTSUPP); | |
330 | ||
331 | if (dhcp6_get_prefix_delegation(link) <= 0) | |
332 | return 0; | |
333 | ||
334 | log_link_debug(link, "Requesting DHCPv6 prefixes to be delegated for new link"); | |
335 | ||
336 | HASHMAP_FOREACH(l, link->manager->links, i) { | |
337 | int r, enabled; | |
338 | ||
339 | if (l == link) | |
340 | continue; | |
341 | ||
342 | if (!l->dhcp6_client) | |
343 | continue; | |
344 | ||
345 | r = sd_dhcp6_client_get_prefix_delegation(l->dhcp6_client, &enabled); | |
346 | if (r < 0) { | |
347 | log_link_warning_errno(l, r, "Cannot get prefix delegation when adding new link"); | |
348 | continue; | |
349 | } | |
350 | ||
351 | if (enabled == 0) { | |
352 | r = sd_dhcp6_client_set_prefix_delegation(l->dhcp6_client, 1); | |
353 | if (r < 0) { | |
354 | log_link_warning_errno(l, r, "Cannot enable prefix delegation when adding new link"); | |
355 | continue; | |
356 | } | |
357 | } | |
358 | ||
359 | r = sd_dhcp6_client_is_running(l->dhcp6_client); | |
360 | if (r <= 0) | |
361 | continue; | |
362 | ||
363 | if (enabled != 0) { | |
364 | log_link_debug(l, "Requesting re-assignment of delegated prefixes after adding new link"); | |
365 | (void) dhcp6_lease_pd_prefix_acquired(l->dhcp6_client, l); | |
366 | ||
367 | continue; | |
368 | } | |
369 | ||
370 | r = sd_dhcp6_client_stop(l->dhcp6_client); | |
371 | if (r < 0) { | |
372 | log_link_warning_errno(l, r, "Cannot stop DHCPv6 prefix delegation client after adding new link"); | |
373 | continue; | |
374 | } | |
375 | ||
376 | r = sd_dhcp6_client_start(l->dhcp6_client); | |
377 | if (r < 0) { | |
378 | log_link_warning_errno(l, r, "Cannot restart DHCPv6 prefix delegation client after adding new link"); | |
379 | continue; | |
380 | } | |
381 | ||
382 | log_link_debug(l, "Restarted DHCPv6 client to acquire prefix delegations after adding new link"); | |
383 | } | |
384 | ||
385 | return 0; | |
386 | } | |
387 | ||
302a796f | 388 | static int dhcp6_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
c62c4628 PF |
389 | int r; |
390 | ||
391 | assert(link); | |
392 | ||
1c4baffc | 393 | r = sd_netlink_message_get_errno(m); |
c62c4628 | 394 | if (r < 0 && r != -EEXIST) { |
be3a09b7 PF |
395 | if (link->rtnl_extended_attrs) { |
396 | log_link_warning(link, "Could not set extended netlink attributes, reverting to fallback mechanism"); | |
397 | ||
398 | link->rtnl_extended_attrs = false; | |
399 | dhcp6_lease_address_acquired(link->dhcp6_client, link); | |
400 | ||
401 | return 1; | |
402 | } | |
403 | ||
e53fc357 | 404 | log_link_error_errno(link, r, "Could not set DHCPv6 address: %m"); |
c62c4628 PF |
405 | |
406 | link_enter_failed(link); | |
407 | ||
408 | } else if (r >= 0) | |
200a0868 | 409 | manager_rtnl_process_address(rtnl, m, link->manager); |
c62c4628 PF |
410 | |
411 | return 1; | |
412 | } | |
413 | ||
1e7a0e21 LP |
414 | static int dhcp6_address_change( |
415 | Link *link, | |
416 | struct in6_addr *ip6_addr, | |
417 | uint32_t lifetime_preferred, | |
418 | uint32_t lifetime_valid) { | |
419 | ||
8e766630 | 420 | _cleanup_(address_freep) Address *addr = NULL; |
1e7a0e21 LP |
421 | char buffer[INET6_ADDRSTRLEN]; |
422 | int r; | |
c62c4628 | 423 | |
f0213e37 | 424 | r = address_new(&addr); |
c62c4628 PF |
425 | if (r < 0) |
426 | return r; | |
427 | ||
428 | addr->family = AF_INET6; | |
429 | memcpy(&addr->in_addr.in6, ip6_addr, sizeof(*ip6_addr)); | |
851c9f82 PF |
430 | |
431 | addr->flags = IFA_F_NOPREFIXROUTE; | |
6d8f6b0b | 432 | addr->prefixlen = 128; |
c62c4628 PF |
433 | |
434 | addr->cinfo.ifa_prefered = lifetime_preferred; | |
435 | addr->cinfo.ifa_valid = lifetime_valid; | |
436 | ||
f2341e0a | 437 | log_link_info(link, |
1e7a0e21 LP |
438 | "DHCPv6 address %s/%d timeout preferred %d valid %d", |
439 | inet_ntop(AF_INET6, &addr->in_addr.in6, buffer, sizeof(buffer)), | |
f2341e0a | 440 | addr->prefixlen, lifetime_preferred, lifetime_valid); |
c62c4628 | 441 | |
66669078 | 442 | r = address_configure(addr, link, dhcp6_address_handler, true); |
c62c4628 | 443 | if (r < 0) |
f2341e0a | 444 | log_link_warning_errno(link, r, "Could not assign DHCPv6 address: %m"); |
c62c4628 PF |
445 | |
446 | return r; | |
447 | } | |
448 | ||
c62c4628 PF |
449 | static int dhcp6_lease_address_acquired(sd_dhcp6_client *client, Link *link) { |
450 | int r; | |
451 | sd_dhcp6_lease *lease; | |
452 | struct in6_addr ip6_addr; | |
453 | uint32_t lifetime_preferred, lifetime_valid; | |
c62c4628 PF |
454 | |
455 | r = sd_dhcp6_client_get_lease(client, &lease); | |
456 | if (r < 0) | |
457 | return r; | |
458 | ||
459 | sd_dhcp6_lease_reset_address_iter(lease); | |
460 | ||
461 | while (sd_dhcp6_lease_get_address(lease, &ip6_addr, | |
483d099e ZJS |
462 | &lifetime_preferred, |
463 | &lifetime_valid) >= 0) { | |
c62c4628 | 464 | |
6d8f6b0b | 465 | r = dhcp6_address_change(link, &ip6_addr, lifetime_preferred, lifetime_valid); |
c62c4628 PF |
466 | if (r < 0) |
467 | return r; | |
468 | } | |
469 | ||
470 | return 0; | |
471 | } | |
472 | ||
5c79bd79 | 473 | static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) { |
c62c4628 | 474 | int r; |
5c79bd79 PF |
475 | Link *link = userdata; |
476 | ||
477 | assert(link); | |
478 | assert(link->network); | |
5c79bd79 PF |
479 | |
480 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
481 | return; | |
482 | ||
483 | switch(event) { | |
10c9ce61 DH |
484 | case SD_DHCP6_CLIENT_EVENT_STOP: |
485 | case SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE: | |
486 | case SD_DHCP6_CLIENT_EVENT_RETRANS_MAX: | |
3098562c TG |
487 | if (sd_dhcp6_client_get_lease(client, NULL) >= 0) |
488 | log_link_warning(link, "DHCPv6 lease lost"); | |
18d29550 | 489 | |
494c868d | 490 | (void) dhcp6_lease_pd_prefix_lost(client, link); |
76c3246d PF |
491 | (void) manager_dhcp6_prefix_remove_all(link->manager, link); |
492 | ||
18d29550 | 493 | link->dhcp6_configured = false; |
c62c4628 PF |
494 | break; |
495 | ||
10c9ce61 | 496 | case SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE: |
c62c4628 PF |
497 | r = dhcp6_lease_address_acquired(client, link); |
498 | if (r < 0) { | |
499 | link_enter_failed(link); | |
500 | return; | |
501 | } | |
502 | ||
76c3246d PF |
503 | r = dhcp6_lease_pd_prefix_acquired(client, link); |
504 | if (r < 0) | |
505 | log_link_debug(link, "DHCPv6 did not receive prefixes to delegate"); | |
506 | ||
4831981d | 507 | _fallthrough_; |
10c9ce61 | 508 | case SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST: |
c62c4628 PF |
509 | r = dhcp6_lease_information_acquired(client, link); |
510 | if (r < 0) { | |
511 | link_enter_failed(link); | |
512 | return; | |
513 | } | |
5c79bd79 | 514 | |
18d29550 | 515 | link->dhcp6_configured = true; |
5c79bd79 PF |
516 | break; |
517 | ||
518 | default: | |
519 | if (event < 0) | |
e53fc357 | 520 | log_link_warning_errno(link, event, "DHCPv6 error: %m"); |
5c79bd79 | 521 | else |
e53fc357 | 522 | log_link_warning(link, "DHCPv6 unknown event: %d", event); |
5c79bd79 PF |
523 | return; |
524 | } | |
18d29550 | 525 | |
8012cd39 | 526 | link_check_ready(link); |
5c79bd79 PF |
527 | } |
528 | ||
720bec40 | 529 | int dhcp6_request_address(Link *link, int ir) { |
125f20b4 | 530 | int r, inf_req, pd; |
7a695d8e | 531 | bool running; |
5c79bd79 | 532 | |
7a695d8e TG |
533 | assert(link); |
534 | assert(link->dhcp6_client); | |
125f20b4 | 535 | assert(link->network); |
720bec40 | 536 | assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0); |
85bd849f | 537 | |
7a695d8e TG |
538 | r = sd_dhcp6_client_is_running(link->dhcp6_client); |
539 | if (r < 0) | |
540 | return r; | |
541 | else | |
5d904a6a | 542 | running = r; |
e6604041 | 543 | |
125f20b4 PF |
544 | r = sd_dhcp6_client_get_prefix_delegation(link->dhcp6_client, &pd); |
545 | if (r < 0) | |
546 | return r; | |
547 | ||
548 | if (pd && ir && link->network->dhcp6_force_pd_other_information) { | |
549 | log_link_debug(link, "Enabling managed mode to request DHCPv6 PD with 'Other Information' set"); | |
550 | ||
551 | r = sd_dhcp6_client_set_address_request(link->dhcp6_client, | |
552 | false); | |
553 | if (r < 0 ) | |
554 | return r; | |
555 | ||
556 | ir = false; | |
557 | } | |
558 | ||
7a695d8e | 559 | if (running) { |
720bec40 TY |
560 | r = sd_dhcp6_client_get_information_request(link->dhcp6_client, &inf_req); |
561 | if (r < 0) | |
562 | return r; | |
563 | ||
564 | if (inf_req == ir) | |
565 | return 0; | |
566 | ||
7a695d8e TG |
567 | r = sd_dhcp6_client_stop(link->dhcp6_client); |
568 | if (r < 0) | |
569 | return r; | |
720bec40 TY |
570 | } else { |
571 | r = sd_dhcp6_client_set_local_address(link->dhcp6_client, &link->ipv6ll_address); | |
572 | if (r < 0) | |
573 | return r; | |
7a695d8e | 574 | } |
85bd849f | 575 | |
720bec40 TY |
576 | r = sd_dhcp6_client_set_information_request(link->dhcp6_client, ir); |
577 | if (r < 0) | |
578 | return r; | |
579 | ||
580 | r = sd_dhcp6_client_start(link->dhcp6_client); | |
7a695d8e TG |
581 | if (r < 0) |
582 | return r; | |
85bd849f | 583 | |
7a695d8e TG |
584 | return 0; |
585 | } | |
18d29550 | 586 | |
8006aa32 SA |
587 | static int dhcp6_set_hostname(sd_dhcp6_client *client, Link *link) { |
588 | _cleanup_free_ char *hostname = NULL; | |
589 | const char *hn; | |
590 | int r; | |
591 | ||
592 | assert(link); | |
593 | ||
594 | if (!link->network->dhcp_send_hostname) | |
595 | hn = NULL; | |
596 | else if (link->network->dhcp_hostname) | |
597 | hn = link->network->dhcp_hostname; | |
598 | else { | |
599 | r = gethostname_strict(&hostname); | |
600 | if (r < 0 && r != -ENXIO) /* ENXIO: no hostname set or hostname is "localhost" */ | |
601 | return r; | |
602 | ||
603 | hn = hostname; | |
604 | } | |
605 | ||
a8494759 YW |
606 | r = sd_dhcp6_client_set_fqdn(client, hn); |
607 | if (r == -EINVAL && hostname) | |
608 | /* Ignore error when the machine's hostname is not suitable to send in DHCP packet. */ | |
609 | log_link_warning_errno(link, r, "DHCP6 CLIENT: Failed to set hostname from kernel hostname, ignoring: %m"); | |
610 | else if (r < 0) | |
611 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set hostname: %m"); | |
612 | ||
613 | return 0; | |
8006aa32 SA |
614 | } |
615 | ||
7a695d8e | 616 | int dhcp6_configure(Link *link) { |
5bad7ebd | 617 | _cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL; |
8341a5c3 | 618 | const DUID *duid; |
fb5c8216 | 619 | int r; |
7a695d8e TG |
620 | |
621 | assert(link); | |
fb5c8216 | 622 | assert(link->network); |
7a695d8e | 623 | |
62379e88 TG |
624 | if (link->dhcp6_client) |
625 | return 0; | |
626 | ||
7a695d8e | 627 | r = sd_dhcp6_client_new(&client); |
5bad7ebd YW |
628 | if (r == -ENOMEM) |
629 | return log_oom(); | |
7a695d8e | 630 | if (r < 0) |
5bad7ebd | 631 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to create DHCP6 client: %m"); |
5c79bd79 | 632 | |
7a695d8e | 633 | r = sd_dhcp6_client_attach_event(client, NULL, 0); |
5c79bd79 | 634 | if (r < 0) |
5bad7ebd | 635 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to attach event: %m"); |
5c79bd79 | 636 | |
7a695d8e | 637 | r = sd_dhcp6_client_set_mac(client, |
5c79bd79 PF |
638 | (const uint8_t *) &link->mac, |
639 | sizeof (link->mac), ARPHRD_ETHER); | |
e6604041 | 640 | if (r < 0) |
5bad7ebd | 641 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set MAC address: %m"); |
5c79bd79 | 642 | |
8217ed5e TH |
643 | if (link->network->iaid_set) { |
644 | r = sd_dhcp6_client_set_iaid(client, link->network->iaid); | |
645 | if (r < 0) | |
646 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set IAID: %m"); | |
647 | } | |
413708d1 | 648 | |
f24648a6 | 649 | duid = link_get_duid(link); |
0cf7c3fd YW |
650 | if (duid->type == DUID_TYPE_LLT && duid->raw_data_len == 0) |
651 | r = sd_dhcp6_client_set_duid_llt(client, duid->llt_time); | |
652 | else | |
653 | r = sd_dhcp6_client_set_duid(client, | |
654 | duid->type, | |
655 | duid->raw_data_len > 0 ? duid->raw_data : NULL, | |
656 | duid->raw_data_len); | |
413708d1 | 657 | if (r < 0) |
5bad7ebd | 658 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set DUID: %m"); |
413708d1 | 659 | |
8006aa32 | 660 | r = dhcp6_set_hostname(client, link); |
8006aa32 | 661 | if (r < 0) |
a8494759 | 662 | return r; |
8006aa32 | 663 | |
2f8e7633 | 664 | r = sd_dhcp6_client_set_ifindex(client, link->ifindex); |
e6604041 | 665 | if (r < 0) |
5bad7ebd | 666 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set ifindex: %m"); |
5c79bd79 | 667 | |
fb5c8216 SS |
668 | if (link->network->rapid_commit) { |
669 | r = sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_RAPID_COMMIT); | |
670 | if (r < 0) | |
5bad7ebd | 671 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set request flag for rapid commit: %m"); |
fb5c8216 SS |
672 | } |
673 | ||
7a695d8e | 674 | r = sd_dhcp6_client_set_callback(client, dhcp6_handler, link); |
e6604041 | 675 | if (r < 0) |
5bad7ebd | 676 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set callback: %m"); |
5c79bd79 | 677 | |
103b81ee PF |
678 | if (dhcp6_enable_prefix_delegation(link)) { |
679 | r = sd_dhcp6_client_set_prefix_delegation(client, true); | |
680 | if (r < 0) | |
5bad7ebd | 681 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set prefix delegation: %m"); |
103b81ee PF |
682 | } |
683 | ||
5bad7ebd | 684 | link->dhcp6_client = TAKE_PTR(client); |
e6604041 | 685 | |
7a695d8e | 686 | return 0; |
5c79bd79 | 687 | } |