Coverage Report

Created: 2019-06-19 13:33

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