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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 | ||
9aa5d8ba | 6 | #include <netinet/in.h> |
5c79bd79 | 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" |
ca5ad760 | 16 | #include "networkd-dhcp6.h" |
23f53b99 TG |
17 | #include "networkd-link.h" |
18 | #include "networkd-manager.h" | |
76c3246d PF |
19 | #include "siphash24.h" |
20 | #include "string-util.h" | |
21 | #include "radv-internal.h" | |
07630cea | 22 | |
be3a09b7 | 23 | static int dhcp6_lease_address_acquired(sd_dhcp6_client *client, Link *link); |
04ed9949 YW |
24 | static Link *dhcp6_prefix_get(Manager *m, struct in6_addr *addr); |
25 | static int dhcp6_prefix_add(Manager *m, struct in6_addr *addr, Link *link); | |
26 | static int dhcp6_prefix_remove_all(Manager *m, Link *link); | |
be3a09b7 | 27 | |
03d4fc2e PF |
28 | static bool dhcp6_get_prefix_delegation(Link *link) { |
29 | if (!link->network) | |
103b81ee | 30 | return false; |
103b81ee | 31 | |
a9eea606 YW |
32 | return IN_SET(link->network->router_prefix_delegation, |
33 | RADV_PREFIX_DELEGATION_DHCP6, | |
34 | RADV_PREFIX_DELEGATION_BOTH); | |
103b81ee PF |
35 | } |
36 | ||
37 | static bool dhcp6_enable_prefix_delegation(Link *dhcp6_link) { | |
38 | Manager *manager; | |
39 | Link *l; | |
40 | Iterator i; | |
41 | ||
42 | assert(dhcp6_link); | |
43 | ||
44 | manager = dhcp6_link->manager; | |
45 | assert(manager); | |
46 | ||
47 | HASHMAP_FOREACH(l, manager->links, i) { | |
48 | if (l == dhcp6_link) | |
49 | continue; | |
50 | ||
03d4fc2e | 51 | if (!dhcp6_get_prefix_delegation(l)) |
103b81ee PF |
52 | continue; |
53 | ||
54 | return true; | |
55 | } | |
56 | ||
57 | return false; | |
58 | } | |
59 | ||
c62c4628 PF |
60 | static int dhcp6_lease_information_acquired(sd_dhcp6_client *client, |
61 | Link *link) { | |
62 | return 0; | |
63 | } | |
64 | ||
76c3246d PF |
65 | static int dhcp6_pd_prefix_assign(Link *link, struct in6_addr *prefix, |
66 | uint8_t prefix_len, | |
67 | uint32_t lifetime_preferred, | |
68 | uint32_t lifetime_valid) { | |
69 | sd_radv *radv = link->radv; | |
70 | int r; | |
71 | _cleanup_(sd_radv_prefix_unrefp) sd_radv_prefix *p = NULL; | |
72 | ||
73 | r = sd_radv_prefix_new(&p); | |
74 | if (r < 0) | |
75 | return r; | |
76 | ||
77 | r = sd_radv_prefix_set_prefix(p, prefix, prefix_len); | |
78 | if (r < 0) | |
79 | return r; | |
80 | ||
81 | r = sd_radv_prefix_set_preferred_lifetime(p, lifetime_preferred); | |
82 | if (r < 0) | |
83 | return r; | |
84 | ||
85 | r = sd_radv_prefix_set_valid_lifetime(p, lifetime_valid); | |
86 | if (r < 0) | |
87 | return r; | |
88 | ||
89 | r = sd_radv_stop(radv); | |
90 | if (r < 0) | |
91 | return r; | |
92 | ||
93 | r = sd_radv_add_prefix(radv, p, true); | |
94 | if (r < 0 && r != -EEXIST) | |
95 | return r; | |
96 | ||
04ed9949 | 97 | r = dhcp6_prefix_add(link->manager, prefix, link); |
76c3246d PF |
98 | if (r < 0) |
99 | return r; | |
100 | ||
101 | return sd_radv_start(radv); | |
102 | } | |
103 | ||
302a796f | 104 | static int dhcp6_route_remove_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) { |
494c868d PF |
105 | int r; |
106 | ||
1046bf9b YW |
107 | assert(link); |
108 | ||
4ff296b0 YW |
109 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
110 | return 1; | |
111 | ||
494c868d PF |
112 | r = sd_netlink_message_get_errno(m); |
113 | if (r < 0) | |
04ed9949 | 114 | log_link_debug_errno(link, r, "Received error on unreachable route removal for DHCPv6 delegated subnet: %m"); |
494c868d | 115 | |
0ae286e6 | 116 | return 1; |
494c868d PF |
117 | } |
118 | ||
65dd5e31 | 119 | int dhcp6_lease_pd_prefix_lost(sd_dhcp6_client *client, Link* link) { |
494c868d PF |
120 | int r; |
121 | sd_dhcp6_lease *lease; | |
122 | union in_addr_union pd_prefix; | |
123 | uint8_t pd_prefix_len; | |
124 | uint32_t lifetime_preferred, lifetime_valid; | |
125 | ||
126 | r = sd_dhcp6_client_get_lease(client, &lease); | |
127 | if (r < 0) | |
128 | return r; | |
129 | ||
494c868d PF |
130 | sd_dhcp6_lease_reset_pd_prefix_iter(lease); |
131 | ||
132 | while (sd_dhcp6_lease_get_pd(lease, &pd_prefix.in6, &pd_prefix_len, | |
133 | &lifetime_preferred, | |
134 | &lifetime_valid) >= 0) { | |
135 | _cleanup_free_ char *buf = NULL; | |
ca7c792b | 136 | Route *route; |
494c868d | 137 | |
ca7c792b | 138 | if (pd_prefix_len >= 64) |
494c868d PF |
139 | continue; |
140 | ||
141 | (void) in_addr_to_string(AF_INET6, &pd_prefix, &buf); | |
142 | ||
ca7c792b YW |
143 | r = route_add(link, AF_INET6, &pd_prefix, pd_prefix_len, 0, 0, 0, &route); |
144 | if (r < 0) { | |
145 | log_link_warning_errno(link, r, "Failed to add unreachable route to delete for DHCPv6 delegated subnet %s/%u: %m", | |
146 | strnull(buf), | |
147 | pd_prefix_len); | |
148 | continue; | |
149 | } | |
dd5ab7d9 | 150 | |
ca7c792b | 151 | route_update(route, NULL, 0, NULL, NULL, 0, 0, RTN_UNREACHABLE); |
494c868d | 152 | |
ca7c792b YW |
153 | r = route_remove(route, link, dhcp6_route_remove_handler); |
154 | if (r < 0) { | |
155 | log_link_warning_errno(link, r, "Cannot delete unreachable route for DHCPv6 delegated subnet %s/%u: %m", | |
156 | strnull(buf), | |
157 | pd_prefix_len); | |
158 | continue; | |
494c868d | 159 | } |
ca7c792b YW |
160 | |
161 | log_link_debug(link, "Removing unreachable route %s/%u", | |
162 | strnull(buf), pd_prefix_len); | |
494c868d PF |
163 | } |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
76c3246d PF |
168 | static int dhcp6_pd_prefix_distribute(Link *dhcp6_link, Iterator *i, |
169 | struct in6_addr *pd_prefix, | |
170 | uint8_t pd_prefix_len, | |
171 | uint32_t lifetime_preferred, | |
172 | uint32_t lifetime_valid) { | |
173 | Link *link; | |
174 | Manager *manager = dhcp6_link->manager; | |
175 | union in_addr_union prefix; | |
9fb96abd | 176 | uint64_t n_prefixes, n_used = 0; |
76c3246d | 177 | _cleanup_free_ char *buf = NULL; |
eb75b919 | 178 | _cleanup_free_ char *assigned_buf = NULL; |
76c3246d PF |
179 | int r; |
180 | ||
181 | assert(manager); | |
182 | assert(pd_prefix_len <= 64); | |
183 | ||
184 | prefix.in6 = *pd_prefix; | |
185 | ||
186 | r = in_addr_mask(AF_INET6, &prefix, pd_prefix_len); | |
187 | if (r < 0) | |
188 | return r; | |
189 | ||
9fb96abd | 190 | n_prefixes = UINT64_C(1) << (64 - pd_prefix_len); |
76c3246d PF |
191 | |
192 | (void) in_addr_to_string(AF_INET6, &prefix, &buf); | |
9fb96abd | 193 | log_link_debug(dhcp6_link, "Assigning up to %" PRIu64 " prefixes from %s/%u", |
76c3246d PF |
194 | n_prefixes, strnull(buf), pd_prefix_len); |
195 | ||
196 | while (hashmap_iterate(manager->links, i, (void **)&link, NULL)) { | |
197 | Link *assigned_link; | |
198 | ||
199 | if (n_used == n_prefixes) { | |
9fb96abd | 200 | log_link_debug(dhcp6_link, "Assigned %" PRIu64 "/%" PRIu64 " prefixes from %s/%u", |
76c3246d PF |
201 | n_used, n_prefixes, strnull(buf), pd_prefix_len); |
202 | ||
203 | return -EAGAIN; | |
204 | } | |
205 | ||
206 | if (link == dhcp6_link) | |
207 | continue; | |
208 | ||
03d4fc2e | 209 | if (!dhcp6_get_prefix_delegation(link)) |
76c3246d PF |
210 | continue; |
211 | ||
04ed9949 | 212 | assigned_link = dhcp6_prefix_get(manager, &prefix.in6); |
2c448c8a | 213 | if (assigned_link && assigned_link != link) |
76c3246d PF |
214 | continue; |
215 | ||
eb75b919 | 216 | (void) in_addr_to_string(AF_INET6, &prefix, &assigned_buf); |
76c3246d PF |
217 | r = dhcp6_pd_prefix_assign(link, &prefix.in6, 64, |
218 | lifetime_preferred, lifetime_valid); | |
219 | if (r < 0) { | |
eb75b919 | 220 | log_link_error_errno(link, r, "Unable to %s prefix %s/64 from %s/%u for link: %m", |
76c3246d | 221 | assigned_link ? "update": "assign", |
eb75b919 | 222 | strnull(assigned_buf), |
76c3246d PF |
223 | strnull(buf), pd_prefix_len); |
224 | ||
4e361acc | 225 | if (!assigned_link) |
76c3246d PF |
226 | continue; |
227 | ||
228 | } else | |
eb75b919 PF |
229 | log_link_debug(link, "Assigned prefix %" PRIu64 "/%" PRIu64 " %s/64 from %s/%u to link", |
230 | n_used + 1, n_prefixes, | |
231 | strnull(assigned_buf), | |
232 | strnull(buf), pd_prefix_len); | |
76c3246d PF |
233 | |
234 | n_used++; | |
235 | ||
37f52406 | 236 | r = in_addr_prefix_next(AF_INET6, &prefix, 64); |
76c3246d PF |
237 | if (r < 0 && n_used < n_prefixes) |
238 | return r; | |
239 | } | |
240 | ||
494c868d PF |
241 | return 0; |
242 | } | |
26db55f3 | 243 | |
302a796f | 244 | static int dhcp6_route_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) { |
494c868d | 245 | int r; |
73922903 | 246 | |
1046bf9b YW |
247 | assert(link); |
248 | ||
4ff296b0 YW |
249 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
250 | return 1; | |
251 | ||
494c868d | 252 | r = sd_netlink_message_get_errno(m); |
4ff296b0 | 253 | if (r < 0 && r != -EEXIST) |
1046bf9b | 254 | log_link_debug_errno(link, r, "Received error when adding unreachable route for DHCPv6 delegated subnet: %m"); |
73922903 | 255 | |
0ae286e6 | 256 | return 1; |
76c3246d PF |
257 | } |
258 | ||
259 | static int dhcp6_lease_pd_prefix_acquired(sd_dhcp6_client *client, Link *link) { | |
260 | int r; | |
261 | sd_dhcp6_lease *lease; | |
494c868d | 262 | union in_addr_union pd_prefix; |
76c3246d PF |
263 | uint8_t pd_prefix_len; |
264 | uint32_t lifetime_preferred, lifetime_valid; | |
76c3246d PF |
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 | ||
ca7c792b YW |
277 | _cleanup_free_ char *buf = NULL; |
278 | ||
279 | (void) in_addr_to_string(AF_INET6, &pd_prefix, &buf); | |
280 | ||
76c3246d PF |
281 | if (pd_prefix_len > 64) { |
282 | log_link_debug(link, "PD Prefix length > 64, ignoring prefix %s/%u", | |
283 | strnull(buf), pd_prefix_len); | |
284 | continue; | |
285 | } | |
286 | ||
ca7c792b | 287 | if (pd_prefix_len < 48) |
3ec8303f PF |
288 | log_link_warning(link, "PD Prefix length < 48, looks unusual %s/%u", |
289 | strnull(buf), pd_prefix_len); | |
3ec8303f | 290 | |
494c868d | 291 | if (pd_prefix_len < 64) { |
bdb9f580 | 292 | uint32_t table; |
ca7c792b | 293 | Route *route; |
494c868d | 294 | |
bdb9f580 YW |
295 | table = link_get_dhcp_route_table(link); |
296 | ||
57445b53 YW |
297 | r = route_add(link, AF_INET6, &pd_prefix, pd_prefix_len, 0, 0, table, &route); |
298 | if (r < 0) { | |
299 | log_link_warning_errno(link, r, "Failed to add unreachable route for DHCPv6 delegated subnet %s/%u: %m", | |
300 | strnull(buf), | |
301 | pd_prefix_len); | |
302 | continue; | |
303 | } | |
304 | ||
305 | route_update(route, NULL, 0, NULL, NULL, 0, 0, RTN_UNREACHABLE); | |
494c868d | 306 | |
c8ee637e | 307 | r = route_configure(route, link, dhcp6_route_handler); |
494c868d PF |
308 | if (r < 0) { |
309 | log_link_warning_errno(link, r, "Cannot configure unreachable route for delegated subnet %s/%u: %m", | |
310 | strnull(buf), | |
311 | pd_prefix_len); | |
494c868d PF |
312 | continue; |
313 | } | |
494c868d | 314 | |
494c868d PF |
315 | log_link_debug(link, "Configuring unreachable route for %s/%u", |
316 | strnull(buf), pd_prefix_len); | |
494c868d PF |
317 | } else |
318 | log_link_debug(link, "Not adding a blocking route since distributed prefix is /64"); | |
319 | ||
320 | r = dhcp6_pd_prefix_distribute(link, &i, &pd_prefix.in6, | |
76c3246d PF |
321 | pd_prefix_len, |
322 | lifetime_preferred, | |
323 | lifetime_valid); | |
324 | if (r < 0 && r != -EAGAIN) | |
325 | return r; | |
326 | ||
327 | if (r >= 0) | |
328 | i = ITERATOR_FIRST; | |
329 | } | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
10752343 PF |
334 | int dhcp6_request_prefix_delegation(Link *link) { |
335 | Link *l; | |
336 | Iterator i; | |
337 | ||
338 | assert_return(link, -EINVAL); | |
339 | assert_return(link->manager, -EOPNOTSUPP); | |
340 | ||
341 | if (dhcp6_get_prefix_delegation(link) <= 0) | |
342 | return 0; | |
343 | ||
344 | log_link_debug(link, "Requesting DHCPv6 prefixes to be delegated for new link"); | |
345 | ||
346 | HASHMAP_FOREACH(l, link->manager->links, i) { | |
347 | int r, enabled; | |
348 | ||
349 | if (l == link) | |
350 | continue; | |
351 | ||
352 | if (!l->dhcp6_client) | |
353 | continue; | |
354 | ||
355 | r = sd_dhcp6_client_get_prefix_delegation(l->dhcp6_client, &enabled); | |
356 | if (r < 0) { | |
357 | log_link_warning_errno(l, r, "Cannot get prefix delegation when adding new link"); | |
358 | continue; | |
359 | } | |
360 | ||
361 | if (enabled == 0) { | |
362 | r = sd_dhcp6_client_set_prefix_delegation(l->dhcp6_client, 1); | |
363 | if (r < 0) { | |
364 | log_link_warning_errno(l, r, "Cannot enable prefix delegation when adding new link"); | |
365 | continue; | |
366 | } | |
367 | } | |
368 | ||
369 | r = sd_dhcp6_client_is_running(l->dhcp6_client); | |
370 | if (r <= 0) | |
371 | continue; | |
372 | ||
373 | if (enabled != 0) { | |
374 | log_link_debug(l, "Requesting re-assignment of delegated prefixes after adding new link"); | |
375 | (void) dhcp6_lease_pd_prefix_acquired(l->dhcp6_client, l); | |
376 | ||
377 | continue; | |
378 | } | |
379 | ||
380 | r = sd_dhcp6_client_stop(l->dhcp6_client); | |
381 | if (r < 0) { | |
382 | log_link_warning_errno(l, r, "Cannot stop DHCPv6 prefix delegation client after adding new link"); | |
383 | continue; | |
384 | } | |
385 | ||
386 | r = sd_dhcp6_client_start(l->dhcp6_client); | |
387 | if (r < 0) { | |
388 | log_link_warning_errno(l, r, "Cannot restart DHCPv6 prefix delegation client after adding new link"); | |
389 | continue; | |
390 | } | |
391 | ||
392 | log_link_debug(l, "Restarted DHCPv6 client to acquire prefix delegations after adding new link"); | |
393 | } | |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
302a796f | 398 | static int dhcp6_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
c62c4628 PF |
399 | int r; |
400 | ||
401 | assert(link); | |
402 | ||
4ff296b0 YW |
403 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
404 | return 1; | |
405 | ||
1c4baffc | 406 | r = sd_netlink_message_get_errno(m); |
c62c4628 | 407 | if (r < 0 && r != -EEXIST) { |
be3a09b7 PF |
408 | if (link->rtnl_extended_attrs) { |
409 | log_link_warning(link, "Could not set extended netlink attributes, reverting to fallback mechanism"); | |
410 | ||
411 | link->rtnl_extended_attrs = false; | |
412 | dhcp6_lease_address_acquired(link->dhcp6_client, link); | |
413 | ||
414 | return 1; | |
415 | } | |
416 | ||
e53fc357 | 417 | log_link_error_errno(link, r, "Could not set DHCPv6 address: %m"); |
c62c4628 PF |
418 | |
419 | link_enter_failed(link); | |
73854ba1 YW |
420 | return 1; |
421 | } | |
422 | if (r >= 0) | |
4ff296b0 | 423 | (void) manager_rtnl_process_address(rtnl, m, link->manager); |
c62c4628 | 424 | |
4ff296b0 YW |
425 | r = link_request_set_routes(link); |
426 | if (r < 0) { | |
427 | link_enter_failed(link); | |
428 | return 1; | |
429 | } | |
6545067a | 430 | |
c62c4628 PF |
431 | return 1; |
432 | } | |
433 | ||
1e7a0e21 LP |
434 | static int dhcp6_address_change( |
435 | Link *link, | |
436 | struct in6_addr *ip6_addr, | |
437 | uint32_t lifetime_preferred, | |
438 | uint32_t lifetime_valid) { | |
439 | ||
8e766630 | 440 | _cleanup_(address_freep) Address *addr = NULL; |
57e44707 | 441 | _cleanup_free_ char *buffer = NULL; |
1e7a0e21 | 442 | int r; |
c62c4628 | 443 | |
f0213e37 | 444 | r = address_new(&addr); |
c62c4628 PF |
445 | if (r < 0) |
446 | return r; | |
447 | ||
448 | addr->family = AF_INET6; | |
57e44707 | 449 | addr->in_addr.in6 = *ip6_addr; |
851c9f82 PF |
450 | |
451 | addr->flags = IFA_F_NOPREFIXROUTE; | |
6d8f6b0b | 452 | addr->prefixlen = 128; |
c62c4628 PF |
453 | |
454 | addr->cinfo.ifa_prefered = lifetime_preferred; | |
455 | addr->cinfo.ifa_valid = lifetime_valid; | |
456 | ||
57e44707 | 457 | (void) in_addr_to_string(addr->family, &addr->in_addr, &buffer); |
f2341e0a | 458 | log_link_info(link, |
1e7a0e21 | 459 | "DHCPv6 address %s/%d timeout preferred %d valid %d", |
57e44707 | 460 | strnull(buffer), addr->prefixlen, lifetime_preferred, lifetime_valid); |
c62c4628 | 461 | |
66669078 | 462 | r = address_configure(addr, link, dhcp6_address_handler, true); |
c62c4628 | 463 | if (r < 0) |
4ff296b0 | 464 | return log_link_warning_errno(link, r, "Could not assign DHCPv6 address: %m"); |
c62c4628 | 465 | |
4ff296b0 | 466 | return 0; |
c62c4628 PF |
467 | } |
468 | ||
c62c4628 PF |
469 | static int dhcp6_lease_address_acquired(sd_dhcp6_client *client, Link *link) { |
470 | int r; | |
471 | sd_dhcp6_lease *lease; | |
472 | struct in6_addr ip6_addr; | |
473 | uint32_t lifetime_preferred, lifetime_valid; | |
c62c4628 PF |
474 | |
475 | r = sd_dhcp6_client_get_lease(client, &lease); | |
476 | if (r < 0) | |
477 | return r; | |
478 | ||
479 | sd_dhcp6_lease_reset_address_iter(lease); | |
480 | ||
481 | while (sd_dhcp6_lease_get_address(lease, &ip6_addr, | |
483d099e ZJS |
482 | &lifetime_preferred, |
483 | &lifetime_valid) >= 0) { | |
c62c4628 | 484 | |
6d8f6b0b | 485 | r = dhcp6_address_change(link, &ip6_addr, lifetime_preferred, lifetime_valid); |
c62c4628 PF |
486 | if (r < 0) |
487 | return r; | |
488 | } | |
489 | ||
490 | return 0; | |
491 | } | |
492 | ||
5c79bd79 | 493 | static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) { |
c62c4628 | 494 | int r; |
5c79bd79 PF |
495 | Link *link = userdata; |
496 | ||
497 | assert(link); | |
498 | assert(link->network); | |
5c79bd79 PF |
499 | |
500 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
501 | return; | |
502 | ||
503 | switch(event) { | |
10c9ce61 DH |
504 | case SD_DHCP6_CLIENT_EVENT_STOP: |
505 | case SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE: | |
506 | case SD_DHCP6_CLIENT_EVENT_RETRANS_MAX: | |
3098562c TG |
507 | if (sd_dhcp6_client_get_lease(client, NULL) >= 0) |
508 | log_link_warning(link, "DHCPv6 lease lost"); | |
18d29550 | 509 | |
494c868d | 510 | (void) dhcp6_lease_pd_prefix_lost(client, link); |
04ed9949 | 511 | (void) dhcp6_prefix_remove_all(link->manager, link); |
76c3246d | 512 | |
18d29550 | 513 | link->dhcp6_configured = false; |
c62c4628 PF |
514 | break; |
515 | ||
10c9ce61 | 516 | case SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE: |
c62c4628 PF |
517 | r = dhcp6_lease_address_acquired(client, link); |
518 | if (r < 0) { | |
519 | link_enter_failed(link); | |
520 | return; | |
521 | } | |
522 | ||
76c3246d PF |
523 | r = dhcp6_lease_pd_prefix_acquired(client, link); |
524 | if (r < 0) | |
525 | log_link_debug(link, "DHCPv6 did not receive prefixes to delegate"); | |
526 | ||
4831981d | 527 | _fallthrough_; |
10c9ce61 | 528 | case SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST: |
c62c4628 PF |
529 | r = dhcp6_lease_information_acquired(client, link); |
530 | if (r < 0) { | |
531 | link_enter_failed(link); | |
532 | return; | |
533 | } | |
5c79bd79 | 534 | |
18d29550 | 535 | link->dhcp6_configured = true; |
5c79bd79 PF |
536 | break; |
537 | ||
538 | default: | |
539 | if (event < 0) | |
e53fc357 | 540 | log_link_warning_errno(link, event, "DHCPv6 error: %m"); |
5c79bd79 | 541 | else |
e53fc357 | 542 | log_link_warning(link, "DHCPv6 unknown event: %d", event); |
5c79bd79 PF |
543 | return; |
544 | } | |
18d29550 | 545 | |
8012cd39 | 546 | link_check_ready(link); |
5c79bd79 PF |
547 | } |
548 | ||
720bec40 | 549 | int dhcp6_request_address(Link *link, int ir) { |
125f20b4 | 550 | int r, inf_req, pd; |
7a695d8e | 551 | bool running; |
5c79bd79 | 552 | |
7a695d8e TG |
553 | assert(link); |
554 | assert(link->dhcp6_client); | |
125f20b4 | 555 | assert(link->network); |
720bec40 | 556 | assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0); |
85bd849f | 557 | |
7a695d8e TG |
558 | r = sd_dhcp6_client_is_running(link->dhcp6_client); |
559 | if (r < 0) | |
560 | return r; | |
561 | else | |
5d904a6a | 562 | running = r; |
e6604041 | 563 | |
125f20b4 PF |
564 | r = sd_dhcp6_client_get_prefix_delegation(link->dhcp6_client, &pd); |
565 | if (r < 0) | |
566 | return r; | |
567 | ||
568 | if (pd && ir && link->network->dhcp6_force_pd_other_information) { | |
569 | log_link_debug(link, "Enabling managed mode to request DHCPv6 PD with 'Other Information' set"); | |
570 | ||
571 | r = sd_dhcp6_client_set_address_request(link->dhcp6_client, | |
572 | false); | |
573 | if (r < 0 ) | |
574 | return r; | |
575 | ||
576 | ir = false; | |
577 | } | |
578 | ||
7a695d8e | 579 | if (running) { |
720bec40 TY |
580 | r = sd_dhcp6_client_get_information_request(link->dhcp6_client, &inf_req); |
581 | if (r < 0) | |
582 | return r; | |
583 | ||
584 | if (inf_req == ir) | |
585 | return 0; | |
586 | ||
7a695d8e TG |
587 | r = sd_dhcp6_client_stop(link->dhcp6_client); |
588 | if (r < 0) | |
589 | return r; | |
720bec40 TY |
590 | } else { |
591 | r = sd_dhcp6_client_set_local_address(link->dhcp6_client, &link->ipv6ll_address); | |
592 | if (r < 0) | |
593 | return r; | |
7a695d8e | 594 | } |
85bd849f | 595 | |
720bec40 TY |
596 | r = sd_dhcp6_client_set_information_request(link->dhcp6_client, ir); |
597 | if (r < 0) | |
598 | return r; | |
599 | ||
600 | r = sd_dhcp6_client_start(link->dhcp6_client); | |
7a695d8e TG |
601 | if (r < 0) |
602 | return r; | |
85bd849f | 603 | |
7a695d8e TG |
604 | return 0; |
605 | } | |
18d29550 | 606 | |
8006aa32 SA |
607 | static int dhcp6_set_hostname(sd_dhcp6_client *client, Link *link) { |
608 | _cleanup_free_ char *hostname = NULL; | |
609 | const char *hn; | |
610 | int r; | |
611 | ||
612 | assert(link); | |
613 | ||
614 | if (!link->network->dhcp_send_hostname) | |
615 | hn = NULL; | |
616 | else if (link->network->dhcp_hostname) | |
617 | hn = link->network->dhcp_hostname; | |
618 | else { | |
619 | r = gethostname_strict(&hostname); | |
620 | if (r < 0 && r != -ENXIO) /* ENXIO: no hostname set or hostname is "localhost" */ | |
621 | return r; | |
622 | ||
623 | hn = hostname; | |
624 | } | |
625 | ||
a8494759 YW |
626 | r = sd_dhcp6_client_set_fqdn(client, hn); |
627 | if (r == -EINVAL && hostname) | |
628 | /* Ignore error when the machine's hostname is not suitable to send in DHCP packet. */ | |
629 | log_link_warning_errno(link, r, "DHCP6 CLIENT: Failed to set hostname from kernel hostname, ignoring: %m"); | |
630 | else if (r < 0) | |
631 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set hostname: %m"); | |
632 | ||
633 | return 0; | |
8006aa32 SA |
634 | } |
635 | ||
7a695d8e | 636 | int dhcp6_configure(Link *link) { |
5bad7ebd | 637 | _cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL; |
8341a5c3 | 638 | const DUID *duid; |
fb5c8216 | 639 | int r; |
7a695d8e TG |
640 | |
641 | assert(link); | |
fb5c8216 | 642 | assert(link->network); |
7a695d8e | 643 | |
62379e88 TG |
644 | if (link->dhcp6_client) |
645 | return 0; | |
646 | ||
7a695d8e | 647 | r = sd_dhcp6_client_new(&client); |
5bad7ebd YW |
648 | if (r == -ENOMEM) |
649 | return log_oom(); | |
7a695d8e | 650 | if (r < 0) |
5bad7ebd | 651 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to create DHCP6 client: %m"); |
5c79bd79 | 652 | |
7a695d8e | 653 | r = sd_dhcp6_client_attach_event(client, NULL, 0); |
5c79bd79 | 654 | if (r < 0) |
5bad7ebd | 655 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to attach event: %m"); |
5c79bd79 | 656 | |
7a695d8e | 657 | r = sd_dhcp6_client_set_mac(client, |
5c79bd79 PF |
658 | (const uint8_t *) &link->mac, |
659 | sizeof (link->mac), ARPHRD_ETHER); | |
e6604041 | 660 | if (r < 0) |
5bad7ebd | 661 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set MAC address: %m"); |
5c79bd79 | 662 | |
8217ed5e TH |
663 | if (link->network->iaid_set) { |
664 | r = sd_dhcp6_client_set_iaid(client, link->network->iaid); | |
665 | if (r < 0) | |
666 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set IAID: %m"); | |
667 | } | |
413708d1 | 668 | |
f24648a6 | 669 | duid = link_get_duid(link); |
0cf7c3fd YW |
670 | if (duid->type == DUID_TYPE_LLT && duid->raw_data_len == 0) |
671 | r = sd_dhcp6_client_set_duid_llt(client, duid->llt_time); | |
672 | else | |
673 | r = sd_dhcp6_client_set_duid(client, | |
674 | duid->type, | |
675 | duid->raw_data_len > 0 ? duid->raw_data : NULL, | |
676 | duid->raw_data_len); | |
413708d1 | 677 | if (r < 0) |
5bad7ebd | 678 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set DUID: %m"); |
413708d1 | 679 | |
8006aa32 | 680 | r = dhcp6_set_hostname(client, link); |
8006aa32 | 681 | if (r < 0) |
a8494759 | 682 | return r; |
8006aa32 | 683 | |
2f8e7633 | 684 | r = sd_dhcp6_client_set_ifindex(client, link->ifindex); |
e6604041 | 685 | if (r < 0) |
5bad7ebd | 686 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set ifindex: %m"); |
5c79bd79 | 687 | |
fb5c8216 SS |
688 | if (link->network->rapid_commit) { |
689 | r = sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_RAPID_COMMIT); | |
690 | if (r < 0) | |
5bad7ebd | 691 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set request flag for rapid commit: %m"); |
fb5c8216 SS |
692 | } |
693 | ||
7a695d8e | 694 | r = sd_dhcp6_client_set_callback(client, dhcp6_handler, link); |
e6604041 | 695 | if (r < 0) |
5bad7ebd | 696 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set callback: %m"); |
5c79bd79 | 697 | |
103b81ee PF |
698 | if (dhcp6_enable_prefix_delegation(link)) { |
699 | r = sd_dhcp6_client_set_prefix_delegation(client, true); | |
700 | if (r < 0) | |
5bad7ebd | 701 | return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set prefix delegation: %m"); |
103b81ee PF |
702 | } |
703 | ||
5bad7ebd | 704 | link->dhcp6_client = TAKE_PTR(client); |
e6604041 | 705 | |
7a695d8e | 706 | return 0; |
5c79bd79 | 707 | } |
04ed9949 YW |
708 | |
709 | static Link *dhcp6_prefix_get(Manager *m, struct in6_addr *addr) { | |
710 | assert_return(m, NULL); | |
711 | assert_return(addr, NULL); | |
712 | ||
713 | return hashmap_get(m->dhcp6_prefixes, addr); | |
714 | } | |
715 | ||
716 | static int dhcp6_route_add_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) { | |
717 | int r; | |
718 | ||
719 | assert(link); | |
720 | ||
4ff296b0 YW |
721 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
722 | return 1; | |
723 | ||
04ed9949 | 724 | r = sd_netlink_message_get_errno(m); |
4ff296b0 | 725 | if (r < 0 && r != -EEXIST) { |
04ed9949 | 726 | log_link_debug_errno(link, r, "Received error adding DHCPv6 Prefix Delegation route: %m"); |
4ff296b0 YW |
727 | link_enter_failed(link); |
728 | return 1; | |
729 | } | |
04ed9949 | 730 | |
4ff296b0 | 731 | return 1; |
04ed9949 YW |
732 | } |
733 | ||
734 | static int dhcp6_prefix_add(Manager *m, struct in6_addr *addr, Link *link) { | |
735 | _cleanup_free_ struct in6_addr *a = NULL; | |
736 | _cleanup_free_ char *buf = NULL; | |
737 | Link *assigned_link; | |
738 | Route *route; | |
739 | int r; | |
740 | ||
741 | assert_return(m, -EINVAL); | |
742 | assert_return(addr, -EINVAL); | |
743 | ||
744 | r = route_add(link, AF_INET6, (union in_addr_union *) addr, 64, | |
745 | 0, 0, 0, &route); | |
746 | if (r < 0) | |
747 | return r; | |
748 | ||
749 | r = route_configure(route, link, dhcp6_route_add_handler); | |
750 | if (r < 0) | |
751 | return r; | |
752 | ||
753 | (void) in_addr_to_string(AF_INET6, (union in_addr_union *) addr, &buf); | |
754 | log_link_debug(link, "Adding prefix route %s/64", strnull(buf)); | |
755 | ||
756 | assigned_link = hashmap_get(m->dhcp6_prefixes, addr); | |
757 | if (assigned_link) { | |
758 | assert(assigned_link == link); | |
759 | return 0; | |
760 | } | |
761 | ||
762 | a = newdup(struct in6_addr, addr, 1); | |
763 | if (!a) | |
764 | return -ENOMEM; | |
765 | ||
766 | r = hashmap_ensure_allocated(&m->dhcp6_prefixes, &in6_addr_hash_ops); | |
767 | if (r < 0) | |
768 | return r; | |
769 | ||
770 | r = hashmap_put(m->dhcp6_prefixes, a, link); | |
771 | if (r < 0) | |
772 | return r; | |
773 | ||
774 | TAKE_PTR(a); | |
775 | link_ref(link); | |
776 | return 0; | |
777 | } | |
778 | ||
779 | static int dhcp6_prefix_remove_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) { | |
780 | int r; | |
781 | ||
782 | assert(link); | |
783 | ||
4ff296b0 YW |
784 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
785 | return 1; | |
786 | ||
04ed9949 | 787 | r = sd_netlink_message_get_errno(m); |
4ff296b0 | 788 | if (r < 0) { |
04ed9949 | 789 | log_link_debug_errno(link, r, "Received error on DHCPv6 Prefix Delegation route removal: %m"); |
4ff296b0 YW |
790 | link_enter_failed(link); |
791 | return 1; | |
792 | } | |
04ed9949 YW |
793 | |
794 | return 1; | |
795 | } | |
796 | ||
797 | int dhcp6_prefix_remove(Manager *m, struct in6_addr *addr) { | |
798 | _cleanup_free_ struct in6_addr *a = NULL; | |
799 | _cleanup_(link_unrefp) Link *l = NULL; | |
800 | _cleanup_free_ char *buf = NULL; | |
801 | Route *route; | |
802 | int r; | |
803 | ||
804 | assert_return(m, -EINVAL); | |
805 | assert_return(addr, -EINVAL); | |
806 | ||
807 | l = hashmap_remove2(m->dhcp6_prefixes, addr, (void **) &a); | |
808 | if (!l) | |
809 | return -EINVAL; | |
810 | ||
811 | (void) sd_radv_remove_prefix(l->radv, addr, 64); | |
812 | r = route_get(l, AF_INET6, (union in_addr_union *) addr, 64, 0, 0, 0, &route); | |
813 | if (r < 0) | |
814 | return r; | |
815 | ||
816 | r = route_remove(route, l, dhcp6_prefix_remove_handler); | |
817 | if (r < 0) | |
818 | return r; | |
819 | ||
820 | (void) in_addr_to_string(AF_INET6, (union in_addr_union *) addr, &buf); | |
821 | log_link_debug(l, "Removing prefix route %s/64", strnull(buf)); | |
822 | ||
823 | return 0; | |
824 | } | |
825 | ||
826 | static int dhcp6_prefix_remove_all(Manager *m, Link *link) { | |
827 | struct in6_addr *addr; | |
828 | Iterator i; | |
829 | Link *l; | |
830 | ||
831 | assert_return(m, -EINVAL); | |
832 | assert_return(link, -EINVAL); | |
833 | ||
834 | HASHMAP_FOREACH_KEY(l, addr, m->dhcp6_prefixes, i) | |
835 | if (l == link) | |
836 | (void) dhcp6_prefix_remove(m, addr); | |
837 | ||
838 | return 0; | |
839 | } |