]>
Commit | Line | Data |
---|---|---|
53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
139b011a | 2 | /*** |
810adae9 | 3 | Copyright © 2014-2015 Intel Corporation. All rights reserved. |
139b011a PF |
4 | ***/ |
5 | ||
6 | #include <errno.h> | |
7 | #include <string.h> | |
631bbe71 | 8 | #include <sys/ioctl.h> |
76253e73 | 9 | #include <linux/if_infiniband.h> |
139b011a | 10 | |
139b011a | 11 | #include "sd-dhcp6-client.h" |
07630cea | 12 | |
b5efdb8a | 13 | #include "alloc-util.h" |
07630cea | 14 | #include "dhcp-identifier.h" |
f12abb48 | 15 | #include "dhcp6-internal.h" |
631bbe71 | 16 | #include "dhcp6-lease-internal.h" |
07630cea | 17 | #include "dhcp6-protocol.h" |
8006aa32 | 18 | #include "dns-domain.h" |
c9393e8c | 19 | #include "event-util.h" |
3ffd4af2 | 20 | #include "fd-util.h" |
8006aa32 | 21 | #include "hostname-util.h" |
c601ebf7 | 22 | #include "in-addr-util.h" |
07630cea LP |
23 | #include "network-internal.h" |
24 | #include "random-util.h" | |
4edc2c9b | 25 | #include "socket-util.h" |
8b43440b | 26 | #include "string-table.h" |
07630cea | 27 | #include "util.h" |
139b011a | 28 | |
76253e73 DW |
29 | #define MAX_MAC_ADDR_LEN INFINIBAND_ALEN |
30 | ||
f311a62b PF |
31 | /* what to request from the server, addresses (IA_NA) and/or prefixes (IA_PD) */ |
32 | enum { | |
33 | DHCP6_REQUEST_IA_NA = 1, | |
34 | DHCP6_REQUEST_IA_TA = 2, /* currently not used */ | |
35 | DHCP6_REQUEST_IA_PD = 4, | |
36 | }; | |
37 | ||
139b011a | 38 | struct sd_dhcp6_client { |
3733eec3 | 39 | unsigned n_ref; |
139b011a PF |
40 | |
41 | enum DHCP6State state; | |
42 | sd_event *event; | |
43 | int event_priority; | |
2f8e7633 | 44 | int ifindex; |
c601ebf7 | 45 | struct in6_addr local_address; |
76253e73 DW |
46 | uint8_t mac_addr[MAX_MAC_ADDR_LEN]; |
47 | size_t mac_addr_len; | |
48 | uint16_t arp_type; | |
f12abb48 | 49 | DHCP6IA ia_na; |
dce6563f | 50 | DHCP6IA ia_pd; |
9a7225de PF |
51 | sd_event_source *timeout_t1; |
52 | sd_event_source *timeout_t2; | |
1346489f | 53 | unsigned request; |
a9aff361 | 54 | be32_t transaction_id; |
346e13a2 | 55 | usec_t transaction_start; |
631bbe71 | 56 | struct sd_dhcp6_lease *lease; |
a9aff361 | 57 | int fd; |
bbfa43ca | 58 | bool information_request; |
8217ed5e | 59 | bool iaid_set; |
da6fe470 PF |
60 | be16_t *req_opts; |
61 | size_t req_opts_allocated; | |
62 | size_t req_opts_len; | |
8006aa32 | 63 | char *fqdn; |
a9aff361 | 64 | sd_event_source *receive_message; |
d1b0afe3 PF |
65 | usec_t retransmit_time; |
66 | uint8_t retransmit_count; | |
67 | sd_event_source *timeout_resend; | |
68 | sd_event_source *timeout_resend_expire; | |
45aa74c7 | 69 | sd_dhcp6_client_callback_t callback; |
139b011a | 70 | void *userdata; |
764aad62 | 71 | struct duid duid; |
66eac120 | 72 | size_t duid_len; |
139b011a PF |
73 | }; |
74 | ||
da6fe470 | 75 | static const uint16_t default_req_opts[] = { |
2c1ab8ca BG |
76 | SD_DHCP6_OPTION_DNS_SERVERS, |
77 | SD_DHCP6_OPTION_DOMAIN_LIST, | |
78 | SD_DHCP6_OPTION_NTP_SERVER, | |
79 | SD_DHCP6_OPTION_SNTP_SERVERS, | |
da6fe470 PF |
80 | }; |
81 | ||
a9aff361 PF |
82 | const char * dhcp6_message_type_table[_DHCP6_MESSAGE_MAX] = { |
83 | [DHCP6_SOLICIT] = "SOLICIT", | |
84 | [DHCP6_ADVERTISE] = "ADVERTISE", | |
85 | [DHCP6_REQUEST] = "REQUEST", | |
86 | [DHCP6_CONFIRM] = "CONFIRM", | |
87 | [DHCP6_RENEW] = "RENEW", | |
88 | [DHCP6_REBIND] = "REBIND", | |
89 | [DHCP6_REPLY] = "REPLY", | |
90 | [DHCP6_RELEASE] = "RELEASE", | |
91 | [DHCP6_DECLINE] = "DECLINE", | |
92 | [DHCP6_RECONFIGURE] = "RECONFIGURE", | |
93 | [DHCP6_INFORMATION_REQUEST] = "INFORMATION-REQUEST", | |
94 | [DHCP6_RELAY_FORW] = "RELAY-FORW", | |
95 | [DHCP6_RELAY_REPL] = "RELAY-REPL", | |
96 | }; | |
97 | ||
98 | DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_type, int); | |
99 | ||
631bbe71 PF |
100 | const char * dhcp6_message_status_table[_DHCP6_STATUS_MAX] = { |
101 | [DHCP6_STATUS_SUCCESS] = "Success", | |
102 | [DHCP6_STATUS_UNSPEC_FAIL] = "Unspecified failure", | |
103 | [DHCP6_STATUS_NO_ADDRS_AVAIL] = "No addresses available", | |
104 | [DHCP6_STATUS_NO_BINDING] = "Binding unavailable", | |
105 | [DHCP6_STATUS_NOT_ON_LINK] = "Not on link", | |
106 | [DHCP6_STATUS_USE_MULTICAST] = "Use multicast", | |
107 | }; | |
108 | ||
109 | DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_status, int); | |
110 | ||
3f0c075f | 111 | #define DHCP6_CLIENT_DONT_DESTROY(client) \ |
4afd3348 | 112 | _cleanup_(sd_dhcp6_client_unrefp) _unused_ sd_dhcp6_client *_dont_destroy_##client = sd_dhcp6_client_ref(client) |
3f0c075f | 113 | |
c3e2adea PF |
114 | static int client_start(sd_dhcp6_client *client, enum DHCP6State state); |
115 | ||
4b558378 ZJS |
116 | int sd_dhcp6_client_set_callback( |
117 | sd_dhcp6_client *client, | |
118 | sd_dhcp6_client_callback_t cb, | |
119 | void *userdata) { | |
45aa74c7 | 120 | |
139b011a PF |
121 | assert_return(client, -EINVAL); |
122 | ||
45aa74c7 | 123 | client->callback = cb; |
139b011a PF |
124 | client->userdata = userdata; |
125 | ||
126 | return 0; | |
127 | } | |
128 | ||
2f8e7633 | 129 | int sd_dhcp6_client_set_ifindex(sd_dhcp6_client *client, int ifindex) { |
139b011a | 130 | |
2f8e7633 LP |
131 | assert_return(client, -EINVAL); |
132 | assert_return(ifindex >= -1, -EINVAL); | |
d7c9c21f PF |
133 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
134 | ||
2f8e7633 | 135 | client->ifindex = ifindex; |
139b011a PF |
136 | return 0; |
137 | } | |
138 | ||
4b558378 ZJS |
139 | int sd_dhcp6_client_set_local_address( |
140 | sd_dhcp6_client *client, | |
141 | const struct in6_addr *local_address) { | |
142 | ||
c601ebf7 TG |
143 | assert_return(client, -EINVAL); |
144 | assert_return(local_address, -EINVAL); | |
145 | assert_return(in_addr_is_link_local(AF_INET6, (const union in_addr_union *) local_address) > 0, -EINVAL); | |
146 | ||
147 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); | |
148 | ||
149 | client->local_address = *local_address; | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
0ae0e5cd LP |
154 | int sd_dhcp6_client_set_mac( |
155 | sd_dhcp6_client *client, | |
156 | const uint8_t *addr, size_t addr_len, | |
157 | uint16_t arp_type) { | |
158 | ||
139b011a | 159 | assert_return(client, -EINVAL); |
76253e73 DW |
160 | assert_return(addr, -EINVAL); |
161 | assert_return(addr_len > 0 && addr_len <= MAX_MAC_ADDR_LEN, -EINVAL); | |
162 | assert_return(arp_type > 0, -EINVAL); | |
163 | ||
d7c9c21f PF |
164 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
165 | ||
76253e73 DW |
166 | if (arp_type == ARPHRD_ETHER) |
167 | assert_return(addr_len == ETH_ALEN, -EINVAL); | |
168 | else if (arp_type == ARPHRD_INFINIBAND) | |
169 | assert_return(addr_len == INFINIBAND_ALEN, -EINVAL); | |
139b011a | 170 | else |
76253e73 DW |
171 | return -EINVAL; |
172 | ||
173 | if (client->mac_addr_len == addr_len && | |
174 | memcmp(&client->mac_addr, addr, addr_len) == 0) | |
175 | return 0; | |
176 | ||
177 | memcpy(&client->mac_addr, addr, addr_len); | |
178 | client->mac_addr_len = addr_len; | |
179 | client->arp_type = arp_type; | |
139b011a PF |
180 | |
181 | return 0; | |
182 | } | |
183 | ||
0ae0e5cd | 184 | static int client_ensure_duid(sd_dhcp6_client *client) { |
cc22955c TH |
185 | if (client->duid_len != 0) |
186 | return 0; | |
0ae0e5cd | 187 | |
cc22955c TH |
188 | return dhcp_identifier_set_duid_en(&client->duid, &client->duid_len); |
189 | } | |
190 | ||
d7df2fd3 ZJS |
191 | /** |
192 | * Sets DUID. If duid is non-null, the DUID is set to duid_type + duid | |
193 | * without further modification. Otherwise, if duid_type is supported, DUID | |
194 | * is set based on that type. Otherwise, an error is returned. | |
195 | */ | |
7e90a499 | 196 | static int dhcp6_client_set_duid_internal( |
4b558378 ZJS |
197 | sd_dhcp6_client *client, |
198 | uint16_t duid_type, | |
f7a92d1a | 199 | const void *duid, |
7e90a499 YW |
200 | size_t duid_len, |
201 | usec_t llt_time) { | |
413708d1 | 202 | int r; |
27eba50e | 203 | |
66eac120 | 204 | assert_return(client, -EINVAL); |
d7df2fd3 | 205 | assert_return(duid_len == 0 || duid != NULL, -EINVAL); |
afec4539 | 206 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
c83321e6 | 207 | |
d7df2fd3 | 208 | if (duid != NULL) { |
ab4a88bc TH |
209 | r = dhcp_validate_duid_len(duid_type, duid_len, true); |
210 | if (r < 0) { | |
211 | r = dhcp_validate_duid_len(duid_type, duid_len, false); | |
212 | if (r < 0) | |
213 | return r; | |
214 | log_dhcp6_client(client, "Setting DUID of type %u with unexpected content", duid_type); | |
215 | } | |
d7df2fd3 | 216 | |
413708d1 VK |
217 | client->duid.type = htobe16(duid_type); |
218 | memcpy(&client->duid.raw.data, duid, duid_len); | |
d7df2fd3 | 219 | client->duid_len = sizeof(client->duid.type) + duid_len; |
d7df2fd3 | 220 | } else |
27eba50e | 221 | switch (duid_type) { |
335f80a6 | 222 | case DUID_TYPE_LLT: |
339697f0 | 223 | if (client->mac_addr_len == 0) |
335f80a6 YW |
224 | return -EOPNOTSUPP; |
225 | ||
53253d9c | 226 | r = dhcp_identifier_set_duid_llt(&client->duid, llt_time, client->mac_addr, client->mac_addr_len, client->arp_type, &client->duid_len); |
335f80a6 YW |
227 | if (r < 0) |
228 | return r; | |
229 | break; | |
27eba50e YW |
230 | case DUID_TYPE_EN: |
231 | r = dhcp_identifier_set_duid_en(&client->duid, &client->duid_len); | |
232 | if (r < 0) | |
233 | return r; | |
234 | break; | |
335f80a6 | 235 | case DUID_TYPE_LL: |
339697f0 | 236 | if (client->mac_addr_len == 0) |
335f80a6 YW |
237 | return -EOPNOTSUPP; |
238 | ||
239 | r = dhcp_identifier_set_duid_ll(&client->duid, client->mac_addr, client->mac_addr_len, client->arp_type, &client->duid_len); | |
240 | if (r < 0) | |
241 | return r; | |
242 | break; | |
27eba50e YW |
243 | case DUID_TYPE_UUID: |
244 | r = dhcp_identifier_set_duid_uuid(&client->duid, &client->duid_len); | |
245 | if (r < 0) | |
246 | return r; | |
247 | break; | |
248 | default: | |
335f80a6 | 249 | return -EINVAL; |
27eba50e | 250 | } |
fe4b2156 | 251 | |
413708d1 VK |
252 | return 0; |
253 | } | |
254 | ||
7e90a499 YW |
255 | int sd_dhcp6_client_set_duid( |
256 | sd_dhcp6_client *client, | |
257 | uint16_t duid_type, | |
258 | const void *duid, | |
259 | size_t duid_len) { | |
260 | return dhcp6_client_set_duid_internal(client, duid_type, duid, duid_len, 0); | |
261 | } | |
262 | ||
263 | int sd_dhcp6_client_set_duid_llt( | |
264 | sd_dhcp6_client *client, | |
265 | usec_t llt_time) { | |
266 | return dhcp6_client_set_duid_internal(client, DUID_TYPE_LLT, NULL, 0, llt_time); | |
267 | } | |
268 | ||
413708d1 VK |
269 | int sd_dhcp6_client_set_iaid(sd_dhcp6_client *client, uint32_t iaid) { |
270 | assert_return(client, -EINVAL); | |
271 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); | |
272 | ||
e0026dcb | 273 | client->ia_na.ia_na.id = htobe32(iaid); |
dce6563f | 274 | client->ia_pd.ia_pd.id = htobe32(iaid); |
8217ed5e | 275 | client->iaid_set = true; |
66eac120 DW |
276 | |
277 | return 0; | |
278 | } | |
279 | ||
8006aa32 SA |
280 | int sd_dhcp6_client_set_fqdn( |
281 | sd_dhcp6_client *client, | |
282 | const char *fqdn) { | |
283 | ||
284 | assert_return(client, -EINVAL); | |
285 | ||
286 | /* Make sure FQDN qualifies as DNS and as Linux hostname */ | |
287 | if (fqdn && | |
288 | !(hostname_is_valid(fqdn, false) && dns_name_is_valid(fqdn) > 0)) | |
289 | return -EINVAL; | |
290 | ||
291 | return free_and_strdup(&client->fqdn, fqdn); | |
292 | } | |
293 | ||
04c01369 | 294 | int sd_dhcp6_client_set_information_request(sd_dhcp6_client *client, int enabled) { |
bbfa43ca | 295 | assert_return(client, -EINVAL); |
d7c9c21f PF |
296 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
297 | ||
bbfa43ca PF |
298 | client->information_request = enabled; |
299 | ||
300 | return 0; | |
301 | } | |
302 | ||
04c01369 | 303 | int sd_dhcp6_client_get_information_request(sd_dhcp6_client *client, int *enabled) { |
bbfa43ca PF |
304 | assert_return(client, -EINVAL); |
305 | assert_return(enabled, -EINVAL); | |
306 | ||
307 | *enabled = client->information_request; | |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
0ae0e5cd | 312 | int sd_dhcp6_client_set_request_option(sd_dhcp6_client *client, uint16_t option) { |
da6fe470 PF |
313 | size_t t; |
314 | ||
315 | assert_return(client, -EINVAL); | |
316 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
317 | ||
318 | switch(option) { | |
a1140666 | 319 | |
2c1ab8ca BG |
320 | case SD_DHCP6_OPTION_DNS_SERVERS: |
321 | case SD_DHCP6_OPTION_DOMAIN_LIST: | |
322 | case SD_DHCP6_OPTION_SNTP_SERVERS: | |
323 | case SD_DHCP6_OPTION_NTP_SERVER: | |
fb5c8216 | 324 | case SD_DHCP6_OPTION_RAPID_COMMIT: |
da6fe470 PF |
325 | break; |
326 | ||
327 | default: | |
328 | return -EINVAL; | |
329 | } | |
330 | ||
331 | for (t = 0; t < client->req_opts_len; t++) | |
332 | if (client->req_opts[t] == htobe16(option)) | |
333 | return -EEXIST; | |
334 | ||
335 | if (!GREEDY_REALLOC(client->req_opts, client->req_opts_allocated, | |
336 | client->req_opts_len + 1)) | |
337 | return -ENOMEM; | |
338 | ||
339 | client->req_opts[client->req_opts_len++] = htobe16(option); | |
340 | ||
341 | return 0; | |
342 | } | |
343 | ||
d8c51121 PF |
344 | int sd_dhcp6_client_get_prefix_delegation(sd_dhcp6_client *client, int *delegation) { |
345 | assert_return(client, -EINVAL); | |
346 | assert_return(delegation, -EINVAL); | |
347 | ||
f311a62b | 348 | *delegation = FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD); |
d8c51121 PF |
349 | |
350 | return 0; | |
351 | } | |
352 | ||
353 | int sd_dhcp6_client_set_prefix_delegation(sd_dhcp6_client *client, int delegation) { | |
7c3de8f8 PF |
354 | assert_return(client, -EINVAL); |
355 | ||
f311a62b PF |
356 | SET_FLAG(client->request, DHCP6_REQUEST_IA_PD, delegation); |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
361 | int sd_dhcp6_client_get_address_request(sd_dhcp6_client *client, int *request) { | |
362 | assert_return(client, -EINVAL); | |
363 | assert_return(request, -EINVAL); | |
364 | ||
365 | *request = FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA); | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
370 | int sd_dhcp6_client_set_address_request(sd_dhcp6_client *client, int request) { | |
371 | assert_return(client, -EINVAL); | |
372 | ||
373 | SET_FLAG(client->request, DHCP6_REQUEST_IA_NA, request); | |
7c3de8f8 PF |
374 | |
375 | return 0; | |
376 | } | |
377 | ||
b62f9008 | 378 | int sd_dhcp6_client_set_transaction_id(sd_dhcp6_client *client, uint32_t transaction_id) { |
d89a400e EV |
379 | assert_return(client, -EINVAL); |
380 | ||
381 | client->transaction_id = transaction_id; | |
382 | ||
383 | return 0; | |
384 | } | |
385 | ||
ea3b3a75 PF |
386 | int sd_dhcp6_client_get_lease(sd_dhcp6_client *client, sd_dhcp6_lease **ret) { |
387 | assert_return(client, -EINVAL); | |
ea3b3a75 PF |
388 | |
389 | if (!client->lease) | |
390 | return -ENOMSG; | |
391 | ||
3098562c TG |
392 | if (ret) |
393 | *ret = client->lease; | |
ea3b3a75 PF |
394 | |
395 | return 0; | |
396 | } | |
397 | ||
3f0c075f | 398 | static void client_notify(sd_dhcp6_client *client, int event) { |
45aa74c7 LP |
399 | assert(client); |
400 | ||
401 | if (client->callback) | |
402 | client->callback(client, event, client->userdata); | |
139b011a PF |
403 | } |
404 | ||
f8908727 | 405 | static int client_reset(sd_dhcp6_client *client) { |
a1140666 | 406 | assert(client); |
f8908727 | 407 | |
431a4bc8 | 408 | client->lease = sd_dhcp6_lease_unref(client->lease); |
4e3e6679 | 409 | |
a9aff361 PF |
410 | client->receive_message = |
411 | sd_event_source_unref(client->receive_message); | |
412 | ||
c3e2adea | 413 | client->transaction_id = 0; |
346e13a2 | 414 | client->transaction_start = 0; |
a9aff361 | 415 | |
d1b0afe3 PF |
416 | client->retransmit_time = 0; |
417 | client->retransmit_count = 0; | |
d1b0afe3 | 418 | |
c9393e8c YW |
419 | (void) event_source_disable(client->timeout_resend); |
420 | (void) event_source_disable(client->timeout_resend_expire); | |
421 | (void) event_source_disable(client->timeout_t1); | |
422 | (void) event_source_disable(client->timeout_t2); | |
213e759a | 423 | |
139b011a PF |
424 | client->state = DHCP6_STATE_STOPPED; |
425 | ||
426 | return 0; | |
427 | } | |
428 | ||
3f0c075f PF |
429 | static void client_stop(sd_dhcp6_client *client, int error) { |
430 | DHCP6_CLIENT_DONT_DESTROY(client); | |
139b011a | 431 | |
3f0c075f | 432 | assert(client); |
139b011a | 433 | |
3f0c075f PF |
434 | client_notify(client, error); |
435 | ||
436 | client_reset(client); | |
139b011a PF |
437 | } |
438 | ||
346e13a2 | 439 | static int client_send_message(sd_dhcp6_client *client, usec_t time_now) { |
a9aff361 PF |
440 | _cleanup_free_ DHCP6Message *message = NULL; |
441 | struct in6_addr all_servers = | |
442 | IN6ADDR_ALL_DHCP6_RELAY_AGENTS_AND_SERVERS_INIT; | |
443 | size_t len, optlen = 512; | |
444 | uint8_t *opt; | |
445 | int r; | |
346e13a2 PF |
446 | usec_t elapsed_usec; |
447 | be16_t elapsed_time; | |
a9aff361 | 448 | |
a1140666 LP |
449 | assert(client); |
450 | ||
a9aff361 PF |
451 | len = sizeof(DHCP6Message) + optlen; |
452 | ||
453 | message = malloc0(len); | |
454 | if (!message) | |
455 | return -ENOMEM; | |
456 | ||
457 | opt = (uint8_t *)(message + 1); | |
458 | ||
459 | message->transaction_id = client->transaction_id; | |
460 | ||
461 | switch(client->state) { | |
bbfa43ca PF |
462 | case DHCP6_STATE_INFORMATION_REQUEST: |
463 | message->type = DHCP6_INFORMATION_REQUEST; | |
464 | ||
465 | break; | |
466 | ||
a9aff361 PF |
467 | case DHCP6_STATE_SOLICITATION: |
468 | message->type = DHCP6_SOLICIT; | |
469 | ||
ed6ee219 | 470 | r = dhcp6_option_append(&opt, &optlen, |
2c1ab8ca | 471 | SD_DHCP6_OPTION_RAPID_COMMIT, 0, NULL); |
926695f1 TA |
472 | if (r < 0) |
473 | return r; | |
ed6ee219 | 474 | |
f311a62b PF |
475 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
476 | r = dhcp6_option_append_ia(&opt, &optlen, | |
477 | &client->ia_na); | |
478 | if (r < 0) | |
479 | return r; | |
480 | } | |
a9aff361 | 481 | |
8006aa32 SA |
482 | if (client->fqdn) { |
483 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
484 | if (r < 0) | |
485 | return r; | |
486 | } | |
487 | ||
f311a62b | 488 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
7c3de8f8 PF |
489 | r = dhcp6_option_append_pd(opt, optlen, &client->ia_pd); |
490 | if (r < 0) | |
491 | return r; | |
492 | ||
493 | opt += r; | |
494 | optlen -= r; | |
495 | } | |
496 | ||
7246333c PF |
497 | break; |
498 | ||
499 | case DHCP6_STATE_REQUEST: | |
3dc34fcc PF |
500 | case DHCP6_STATE_RENEW: |
501 | ||
502 | if (client->state == DHCP6_STATE_REQUEST) | |
503 | message->type = DHCP6_REQUEST; | |
504 | else | |
505 | message->type = DHCP6_RENEW; | |
7246333c | 506 | |
2c1ab8ca | 507 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_SERVERID, |
7246333c PF |
508 | client->lease->serverid_len, |
509 | client->lease->serverid); | |
510 | if (r < 0) | |
511 | return r; | |
512 | ||
f311a62b PF |
513 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
514 | r = dhcp6_option_append_ia(&opt, &optlen, | |
515 | &client->lease->ia); | |
516 | if (r < 0) | |
517 | return r; | |
518 | } | |
a9aff361 | 519 | |
8006aa32 SA |
520 | if (client->fqdn) { |
521 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
522 | if (r < 0) | |
523 | return r; | |
524 | } | |
525 | ||
f311a62b | 526 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
7c3de8f8 PF |
527 | r = dhcp6_option_append_pd(opt, optlen, &client->lease->pd); |
528 | if (r < 0) | |
529 | return r; | |
530 | ||
531 | opt += r; | |
532 | optlen -= r; | |
533 | } | |
534 | ||
a9aff361 PF |
535 | break; |
536 | ||
3dc34fcc PF |
537 | case DHCP6_STATE_REBIND: |
538 | message->type = DHCP6_REBIND; | |
539 | ||
f311a62b PF |
540 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
541 | r = dhcp6_option_append_ia(&opt, &optlen, &client->lease->ia); | |
542 | if (r < 0) | |
543 | return r; | |
544 | } | |
3dc34fcc | 545 | |
8006aa32 SA |
546 | if (client->fqdn) { |
547 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
548 | if (r < 0) | |
549 | return r; | |
550 | } | |
551 | ||
f311a62b | 552 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
7c3de8f8 PF |
553 | r = dhcp6_option_append_pd(opt, optlen, &client->lease->pd); |
554 | if (r < 0) | |
555 | return r; | |
556 | ||
557 | opt += r; | |
558 | optlen -= r; | |
559 | } | |
560 | ||
3dc34fcc PF |
561 | break; |
562 | ||
a9aff361 | 563 | case DHCP6_STATE_STOPPED: |
a34b57c0 | 564 | case DHCP6_STATE_BOUND: |
a9aff361 PF |
565 | return -EINVAL; |
566 | } | |
567 | ||
2c1ab8ca | 568 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ORO, |
da6fe470 PF |
569 | client->req_opts_len * sizeof(be16_t), |
570 | client->req_opts); | |
571 | if (r < 0) | |
572 | return r; | |
573 | ||
ccd1fc2f | 574 | assert(client->duid_len); |
2c1ab8ca | 575 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_CLIENTID, |
66eac120 | 576 | client->duid_len, &client->duid); |
7246333c PF |
577 | if (r < 0) |
578 | return r; | |
579 | ||
346e13a2 PF |
580 | elapsed_usec = time_now - client->transaction_start; |
581 | if (elapsed_usec < 0xffff * USEC_PER_MSEC * 10) | |
582 | elapsed_time = htobe16(elapsed_usec / USEC_PER_MSEC / 10); | |
583 | else | |
584 | elapsed_time = 0xffff; | |
585 | ||
2c1ab8ca | 586 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ELAPSED_TIME, |
346e13a2 PF |
587 | sizeof(elapsed_time), &elapsed_time); |
588 | if (r < 0) | |
589 | return r; | |
590 | ||
a9aff361 PF |
591 | r = dhcp6_network_send_udp_socket(client->fd, &all_servers, message, |
592 | len - optlen); | |
593 | if (r < 0) | |
594 | return r; | |
595 | ||
596 | log_dhcp6_client(client, "Sent %s", | |
597 | dhcp6_message_type_to_string(message->type)); | |
598 | ||
599 | return 0; | |
600 | } | |
601 | ||
4b558378 | 602 | static int client_timeout_t2(sd_event_source *s, uint64_t usec, void *userdata) { |
a34b57c0 PF |
603 | sd_dhcp6_client *client = userdata; |
604 | ||
a1140666 LP |
605 | assert(s); |
606 | assert(client); | |
607 | assert(client->lease); | |
a34b57c0 | 608 | |
c9393e8c | 609 | (void) event_source_disable(client->timeout_t2); |
a34b57c0 PF |
610 | |
611 | log_dhcp6_client(client, "Timeout T2"); | |
612 | ||
3dc34fcc PF |
613 | client_start(client, DHCP6_STATE_REBIND); |
614 | ||
a34b57c0 PF |
615 | return 0; |
616 | } | |
617 | ||
4b558378 | 618 | static int client_timeout_t1(sd_event_source *s, uint64_t usec, void *userdata) { |
a34b57c0 PF |
619 | sd_dhcp6_client *client = userdata; |
620 | ||
a1140666 LP |
621 | assert(s); |
622 | assert(client); | |
623 | assert(client->lease); | |
a34b57c0 | 624 | |
c9393e8c | 625 | (void) event_source_disable(client->timeout_t1); |
a34b57c0 PF |
626 | |
627 | log_dhcp6_client(client, "Timeout T1"); | |
628 | ||
3dc34fcc PF |
629 | client_start(client, DHCP6_STATE_RENEW); |
630 | ||
a34b57c0 PF |
631 | return 0; |
632 | } | |
633 | ||
4b558378 | 634 | static int client_timeout_resend_expire(sd_event_source *s, uint64_t usec, void *userdata) { |
d1b0afe3 | 635 | sd_dhcp6_client *client = userdata; |
3dc34fcc PF |
636 | DHCP6_CLIENT_DONT_DESTROY(client); |
637 | enum DHCP6State state; | |
d1b0afe3 PF |
638 | |
639 | assert(s); | |
640 | assert(client); | |
641 | assert(client->event); | |
642 | ||
3dc34fcc PF |
643 | state = client->state; |
644 | ||
10c9ce61 | 645 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE); |
d1b0afe3 | 646 | |
3dc34fcc PF |
647 | /* RFC 3315, section 18.1.4., says that "...the client may choose to |
648 | use a Solicit message to locate a new DHCP server..." */ | |
649 | if (state == DHCP6_STATE_REBIND) | |
650 | client_start(client, DHCP6_STATE_SOLICITATION); | |
651 | ||
d1b0afe3 PF |
652 | return 0; |
653 | } | |
654 | ||
655 | static usec_t client_timeout_compute_random(usec_t val) { | |
656 | return val - val / 10 + | |
657 | (random_u32() % (2 * USEC_PER_SEC)) * val / 10 / USEC_PER_SEC; | |
658 | } | |
659 | ||
4b558378 | 660 | static int client_timeout_resend(sd_event_source *s, uint64_t usec, void *userdata) { |
d1b0afe3 PF |
661 | int r = 0; |
662 | sd_dhcp6_client *client = userdata; | |
4b4923e6 | 663 | usec_t time_now, init_retransmit_time = 0, max_retransmit_time = 0; |
5e913450 | 664 | usec_t max_retransmit_duration = 0; |
513a6fa8 | 665 | uint8_t max_retransmit_count = 0; |
d1b0afe3 | 666 | char time_string[FORMAT_TIMESPAN_MAX]; |
3dc34fcc | 667 | uint32_t expire = 0; |
d1b0afe3 PF |
668 | |
669 | assert(s); | |
670 | assert(client); | |
671 | assert(client->event); | |
672 | ||
c9393e8c | 673 | (void) event_source_disable(client->timeout_resend); |
d1b0afe3 PF |
674 | |
675 | switch (client->state) { | |
bbfa43ca PF |
676 | case DHCP6_STATE_INFORMATION_REQUEST: |
677 | init_retransmit_time = DHCP6_INF_TIMEOUT; | |
678 | max_retransmit_time = DHCP6_INF_MAX_RT; | |
679 | ||
680 | break; | |
681 | ||
d1b0afe3 | 682 | case DHCP6_STATE_SOLICITATION: |
7246333c PF |
683 | |
684 | if (client->retransmit_count && client->lease) { | |
685 | client_start(client, DHCP6_STATE_REQUEST); | |
686 | return 0; | |
687 | } | |
688 | ||
d1b0afe3 PF |
689 | init_retransmit_time = DHCP6_SOL_TIMEOUT; |
690 | max_retransmit_time = DHCP6_SOL_MAX_RT; | |
d1b0afe3 PF |
691 | |
692 | break; | |
693 | ||
7246333c PF |
694 | case DHCP6_STATE_REQUEST: |
695 | init_retransmit_time = DHCP6_REQ_TIMEOUT; | |
696 | max_retransmit_time = DHCP6_REQ_MAX_RT; | |
697 | max_retransmit_count = DHCP6_REQ_MAX_RC; | |
7246333c PF |
698 | |
699 | break; | |
700 | ||
3dc34fcc PF |
701 | case DHCP6_STATE_RENEW: |
702 | init_retransmit_time = DHCP6_REN_TIMEOUT; | |
703 | max_retransmit_time = DHCP6_REN_MAX_RT; | |
3dc34fcc PF |
704 | |
705 | /* RFC 3315, section 18.1.3. says max retransmit duration will | |
706 | be the remaining time until T2. Instead of setting MRD, | |
707 | wait for T2 to trigger with the same end result */ | |
3dc34fcc PF |
708 | |
709 | break; | |
710 | ||
711 | case DHCP6_STATE_REBIND: | |
712 | init_retransmit_time = DHCP6_REB_TIMEOUT; | |
713 | max_retransmit_time = DHCP6_REB_MAX_RT; | |
3dc34fcc | 714 | |
c9393e8c | 715 | if (event_source_is_enabled(client->timeout_resend_expire) <= 0) { |
3dc34fcc PF |
716 | r = dhcp6_lease_ia_rebind_expire(&client->lease->ia, |
717 | &expire); | |
718 | if (r < 0) { | |
719 | client_stop(client, r); | |
720 | return 0; | |
721 | } | |
722 | max_retransmit_duration = expire * USEC_PER_SEC; | |
723 | } | |
724 | ||
725 | break; | |
726 | ||
d1b0afe3 | 727 | case DHCP6_STATE_STOPPED: |
a34b57c0 | 728 | case DHCP6_STATE_BOUND: |
d1b0afe3 PF |
729 | return 0; |
730 | } | |
731 | ||
732 | if (max_retransmit_count && | |
733 | client->retransmit_count >= max_retransmit_count) { | |
10c9ce61 | 734 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RETRANS_MAX); |
d1b0afe3 PF |
735 | return 0; |
736 | } | |
737 | ||
fa94c34b | 738 | r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now); |
d1b0afe3 PF |
739 | if (r < 0) |
740 | goto error; | |
741 | ||
346e13a2 PF |
742 | r = client_send_message(client, time_now); |
743 | if (r >= 0) | |
744 | client->retransmit_count++; | |
745 | ||
d1b0afe3 PF |
746 | if (!client->retransmit_time) { |
747 | client->retransmit_time = | |
748 | client_timeout_compute_random(init_retransmit_time); | |
a9aff361 PF |
749 | |
750 | if (client->state == DHCP6_STATE_SOLICITATION) | |
751 | client->retransmit_time += init_retransmit_time / 10; | |
752 | ||
d1b0afe3 PF |
753 | } else { |
754 | if (max_retransmit_time && | |
755 | client->retransmit_time > max_retransmit_time / 2) | |
756 | client->retransmit_time = client_timeout_compute_random(max_retransmit_time); | |
757 | else | |
758 | client->retransmit_time += client_timeout_compute_random(client->retransmit_time); | |
759 | } | |
760 | ||
761 | log_dhcp6_client(client, "Next retransmission in %s", | |
ed19c567 | 762 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, client->retransmit_time, USEC_PER_SEC)); |
d1b0afe3 | 763 | |
c9393e8c YW |
764 | r = event_reset_time(client->event, &client->timeout_resend, |
765 | clock_boottime_or_monotonic(), | |
766 | time_now + client->retransmit_time, 10 * USEC_PER_MSEC, | |
767 | client_timeout_resend, client, | |
768 | client->event_priority, "dhcp6-resend-timer", true); | |
d1b0afe3 PF |
769 | if (r < 0) |
770 | goto error; | |
771 | ||
c9393e8c | 772 | if (max_retransmit_duration && event_source_is_enabled(client->timeout_resend_expire) <= 0) { |
d1b0afe3 PF |
773 | |
774 | log_dhcp6_client(client, "Max retransmission duration %"PRIu64" secs", | |
775 | max_retransmit_duration / USEC_PER_SEC); | |
776 | ||
c9393e8c YW |
777 | r = event_reset_time(client->event, &client->timeout_resend_expire, |
778 | clock_boottime_or_monotonic(), | |
779 | time_now + max_retransmit_duration, USEC_PER_SEC, | |
780 | client_timeout_resend_expire, client, | |
781 | client->event_priority, "dhcp6-resend-expire-timer", true); | |
9021bb9f TG |
782 | if (r < 0) |
783 | goto error; | |
d1b0afe3 PF |
784 | } |
785 | ||
786 | error: | |
787 | if (r < 0) | |
788 | client_stop(client, r); | |
789 | ||
790 | return 0; | |
791 | } | |
792 | ||
f12abb48 | 793 | static int client_ensure_iaid(sd_dhcp6_client *client) { |
cfb5b380 | 794 | int r; |
6d13616b | 795 | uint32_t iaid; |
f12abb48 PF |
796 | |
797 | assert(client); | |
798 | ||
8217ed5e | 799 | if (client->iaid_set) |
f12abb48 PF |
800 | return 0; |
801 | ||
6d13616b | 802 | r = dhcp_identifier_set_iaid(client->ifindex, client->mac_addr, client->mac_addr_len, true, &iaid); |
cfb5b380 TG |
803 | if (r < 0) |
804 | return r; | |
f12abb48 | 805 | |
69b43997 PF |
806 | client->ia_na.ia_na.id = iaid; |
807 | client->ia_pd.ia_pd.id = iaid; | |
8217ed5e | 808 | client->iaid_set = true; |
69b43997 | 809 | |
f12abb48 PF |
810 | return 0; |
811 | } | |
812 | ||
4b558378 ZJS |
813 | static int client_parse_message( |
814 | sd_dhcp6_client *client, | |
815 | DHCP6Message *message, | |
816 | size_t len, | |
817 | sd_dhcp6_lease *lease) { | |
da07cf35 YW |
818 | |
819 | uint32_t lt_t1 = ~0, lt_t2 = ~0; | |
820 | bool clientid = false; | |
3bc424a3 | 821 | size_t pos = 0; |
631bbe71 | 822 | int r; |
631bbe71 | 823 | |
a1140666 LP |
824 | assert(client); |
825 | assert(message); | |
826 | assert(len >= sizeof(DHCP6Message)); | |
827 | assert(lease); | |
828 | ||
44481a8b ZJS |
829 | len -= sizeof(DHCP6Message); |
830 | ||
3bc424a3 | 831 | while (pos < len) { |
da07cf35 | 832 | DHCP6Option *option = (DHCP6Option *) &message->options[pos]; |
c6b4f32a | 833 | uint16_t optcode, optlen; |
3bc424a3 | 834 | be32_t iaid_lease; |
da07cf35 YW |
835 | uint8_t *optval; |
836 | int status; | |
3bc424a3 | 837 | |
da07cf35 | 838 | if (len < pos + offsetof(DHCP6Option, data)) |
3bc424a3 PF |
839 | return -ENOBUFS; |
840 | ||
841 | optcode = be16toh(option->code); | |
842 | optlen = be16toh(option->len); | |
843 | optval = option->data; | |
844 | ||
da07cf35 YW |
845 | if (len < pos + offsetof(DHCP6Option, data) + optlen) |
846 | return -ENOBUFS; | |
847 | ||
631bbe71 | 848 | switch (optcode) { |
2c1ab8ca | 849 | case SD_DHCP6_OPTION_CLIENTID: |
631bbe71 PF |
850 | if (clientid) { |
851 | log_dhcp6_client(client, "%s contains multiple clientids", | |
852 | dhcp6_message_type_to_string(message->type)); | |
853 | return -EINVAL; | |
854 | } | |
855 | ||
66eac120 | 856 | if (optlen != client->duid_len || |
631bbe71 PF |
857 | memcmp(&client->duid, optval, optlen) != 0) { |
858 | log_dhcp6_client(client, "%s DUID does not match", | |
859 | dhcp6_message_type_to_string(message->type)); | |
860 | ||
861 | return -EINVAL; | |
862 | } | |
863 | clientid = true; | |
864 | ||
865 | break; | |
866 | ||
2c1ab8ca | 867 | case SD_DHCP6_OPTION_SERVERID: |
99f1d3fc ZJS |
868 | r = dhcp6_lease_get_serverid(lease, NULL, NULL); |
869 | if (r >= 0) { | |
631bbe71 PF |
870 | log_dhcp6_client(client, "%s contains multiple serverids", |
871 | dhcp6_message_type_to_string(message->type)); | |
872 | return -EINVAL; | |
873 | } | |
874 | ||
875 | r = dhcp6_lease_set_serverid(lease, optval, optlen); | |
876 | if (r < 0) | |
877 | return r; | |
878 | ||
879 | break; | |
880 | ||
2c1ab8ca | 881 | case SD_DHCP6_OPTION_PREFERENCE: |
631bbe71 PF |
882 | if (optlen != 1) |
883 | return -EINVAL; | |
884 | ||
3bc424a3 | 885 | r = dhcp6_lease_set_preference(lease, optval[0]); |
631bbe71 PF |
886 | if (r < 0) |
887 | return r; | |
888 | ||
889 | break; | |
890 | ||
2c1ab8ca | 891 | case SD_DHCP6_OPTION_STATUS_CODE: |
91c43f39 YW |
892 | status = dhcp6_option_parse_status(option, optlen + sizeof(DHCP6Option)); |
893 | if (status < 0) | |
894 | return status; | |
895 | ||
896 | if (status > 0) { | |
631bbe71 PF |
897 | log_dhcp6_client(client, "%s Status %s", |
898 | dhcp6_message_type_to_string(message->type), | |
899 | dhcp6_message_status_to_string(status)); | |
c6b4f32a | 900 | |
631bbe71 PF |
901 | return -EINVAL; |
902 | } | |
903 | ||
904 | break; | |
905 | ||
2c1ab8ca | 906 | case SD_DHCP6_OPTION_IA_NA: |
bbfa43ca PF |
907 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { |
908 | log_dhcp6_client(client, "Information request ignoring IA NA option"); | |
909 | ||
910 | break; | |
911 | } | |
912 | ||
3bc424a3 | 913 | r = dhcp6_option_parse_ia(option, &lease->ia); |
631bbe71 PF |
914 | if (r < 0 && r != -ENOMSG) |
915 | return r; | |
916 | ||
917 | r = dhcp6_lease_get_iaid(lease, &iaid_lease); | |
918 | if (r < 0) | |
919 | return r; | |
920 | ||
e0026dcb | 921 | if (client->ia_na.ia_na.id != iaid_lease) { |
dce6563f PF |
922 | log_dhcp6_client(client, "%s has wrong IAID for IA NA", |
923 | dhcp6_message_type_to_string(message->type)); | |
924 | return -EINVAL; | |
925 | } | |
926 | ||
b47fb949 PF |
927 | if (lease->ia.addresses) { |
928 | lt_t1 = MIN(lt_t1, be32toh(lease->ia.ia_na.lifetime_t1)); | |
929 | lt_t2 = MIN(lt_t2, be32toh(lease->ia.ia_na.lifetime_t1)); | |
930 | } | |
931 | ||
dce6563f PF |
932 | break; |
933 | ||
934 | case SD_DHCP6_OPTION_IA_PD: | |
935 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { | |
936 | log_dhcp6_client(client, "Information request ignoring IA PD option"); | |
937 | ||
938 | break; | |
939 | } | |
940 | ||
941 | r = dhcp6_option_parse_ia(option, &lease->pd); | |
942 | if (r < 0 && r != -ENOMSG) | |
943 | return r; | |
944 | ||
49228c75 | 945 | r = dhcp6_lease_get_pd_iaid(lease, &iaid_lease); |
dce6563f PF |
946 | if (r < 0) |
947 | return r; | |
948 | ||
949 | if (client->ia_pd.ia_pd.id != iaid_lease) { | |
950 | log_dhcp6_client(client, "%s has wrong IAID for IA PD", | |
631bbe71 PF |
951 | dhcp6_message_type_to_string(message->type)); |
952 | return -EINVAL; | |
953 | } | |
954 | ||
b47fb949 PF |
955 | if (lease->pd.addresses) { |
956 | lt_t1 = MIN(lt_t1, be32toh(lease->pd.ia_pd.lifetime_t1)); | |
957 | lt_t2 = MIN(lt_t2, be32toh(lease->pd.ia_pd.lifetime_t2)); | |
958 | } | |
959 | ||
631bbe71 | 960 | break; |
ed6ee219 | 961 | |
2c1ab8ca | 962 | case SD_DHCP6_OPTION_RAPID_COMMIT: |
ed6ee219 PF |
963 | r = dhcp6_lease_set_rapid_commit(lease); |
964 | if (r < 0) | |
965 | return r; | |
966 | ||
967 | break; | |
7bd8e95d | 968 | |
2c1ab8ca | 969 | case SD_DHCP6_OPTION_DNS_SERVERS: |
7bd8e95d PF |
970 | r = dhcp6_lease_set_dns(lease, optval, optlen); |
971 | if (r < 0) | |
972 | return r; | |
973 | ||
974 | break; | |
5da1b97f | 975 | |
2c1ab8ca | 976 | case SD_DHCP6_OPTION_DOMAIN_LIST: |
5da1b97f PF |
977 | r = dhcp6_lease_set_domains(lease, optval, optlen); |
978 | if (r < 0) | |
979 | return r; | |
980 | ||
981 | break; | |
982 | ||
2c1ab8ca | 983 | case SD_DHCP6_OPTION_NTP_SERVER: |
6599680e PF |
984 | r = dhcp6_lease_set_ntp(lease, optval, optlen); |
985 | if (r < 0) | |
986 | return r; | |
987 | ||
988 | break; | |
41e4615d | 989 | |
2c1ab8ca | 990 | case SD_DHCP6_OPTION_SNTP_SERVERS: |
41e4615d PF |
991 | r = dhcp6_lease_set_sntp(lease, optval, optlen); |
992 | if (r < 0) | |
993 | return r; | |
994 | ||
995 | break; | |
631bbe71 | 996 | } |
6599680e | 997 | |
23976cb9 | 998 | pos += offsetof(DHCP6Option, data) + optlen; |
631bbe71 PF |
999 | } |
1000 | ||
1eeddba4 | 1001 | if (!clientid) { |
631bbe71 PF |
1002 | log_dhcp6_client(client, "%s has incomplete options", |
1003 | dhcp6_message_type_to_string(message->type)); | |
1004 | return -EINVAL; | |
1005 | } | |
1006 | ||
bbfa43ca | 1007 | if (client->state != DHCP6_STATE_INFORMATION_REQUEST) { |
99f1d3fc ZJS |
1008 | r = dhcp6_lease_get_serverid(lease, NULL, NULL); |
1009 | if (r < 0) { | |
bbfa43ca PF |
1010 | log_dhcp6_client(client, "%s has no server id", |
1011 | dhcp6_message_type_to_string(message->type)); | |
99f1d3fc ZJS |
1012 | return -EINVAL; |
1013 | } | |
b47fb949 | 1014 | |
99f1d3fc ZJS |
1015 | } else { |
1016 | if (lease->ia.addresses) { | |
1017 | lease->ia.ia_na.lifetime_t1 = htobe32(lt_t1); | |
1018 | lease->ia.ia_na.lifetime_t2 = htobe32(lt_t2); | |
1019 | } | |
b47fb949 | 1020 | |
99f1d3fc ZJS |
1021 | if (lease->pd.addresses) { |
1022 | lease->pd.ia_pd.lifetime_t1 = htobe32(lt_t1); | |
1023 | lease->pd.ia_pd.lifetime_t2 = htobe32(lt_t2); | |
1024 | } | |
bbfa43ca | 1025 | } |
631bbe71 | 1026 | |
21a9905c | 1027 | return 0; |
631bbe71 PF |
1028 | } |
1029 | ||
0ae0e5cd | 1030 | static int client_receive_reply(sd_dhcp6_client *client, DHCP6Message *reply, size_t len) { |
4afd3348 | 1031 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
ed6ee219 | 1032 | bool rapid_commit; |
a1140666 LP |
1033 | int r; |
1034 | ||
1035 | assert(client); | |
1036 | assert(reply); | |
a34b57c0 PF |
1037 | |
1038 | if (reply->type != DHCP6_REPLY) | |
ed6ee219 | 1039 | return 0; |
a34b57c0 PF |
1040 | |
1041 | r = dhcp6_lease_new(&lease); | |
1042 | if (r < 0) | |
1043 | return -ENOMEM; | |
1044 | ||
1045 | r = client_parse_message(client, reply, len, lease); | |
1046 | if (r < 0) | |
1047 | return r; | |
1048 | ||
ed6ee219 PF |
1049 | if (client->state == DHCP6_STATE_SOLICITATION) { |
1050 | r = dhcp6_lease_get_rapid_commit(lease, &rapid_commit); | |
1051 | if (r < 0) | |
1052 | return r; | |
1053 | ||
1054 | if (!rapid_commit) | |
1055 | return 0; | |
1056 | } | |
1057 | ||
431a4bc8 YW |
1058 | sd_dhcp6_lease_unref(client->lease); |
1059 | client->lease = TAKE_PTR(lease); | |
a34b57c0 PF |
1060 | |
1061 | return DHCP6_STATE_BOUND; | |
1062 | } | |
1063 | ||
0ae0e5cd | 1064 | static int client_receive_advertise(sd_dhcp6_client *client, DHCP6Message *advertise, size_t len) { |
4afd3348 | 1065 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
631bbe71 | 1066 | uint8_t pref_advertise = 0, pref_lease = 0; |
a1140666 | 1067 | int r; |
631bbe71 PF |
1068 | |
1069 | if (advertise->type != DHCP6_ADVERTISE) | |
ed6ee219 | 1070 | return 0; |
631bbe71 PF |
1071 | |
1072 | r = dhcp6_lease_new(&lease); | |
1073 | if (r < 0) | |
1074 | return r; | |
1075 | ||
1076 | r = client_parse_message(client, advertise, len, lease); | |
1077 | if (r < 0) | |
1078 | return r; | |
1079 | ||
1080 | r = dhcp6_lease_get_preference(lease, &pref_advertise); | |
1081 | if (r < 0) | |
1082 | return r; | |
1083 | ||
1084 | r = dhcp6_lease_get_preference(client->lease, &pref_lease); | |
bbfa43ca PF |
1085 | |
1086 | if (r < 0 || pref_advertise > pref_lease) { | |
431a4bc8 YW |
1087 | sd_dhcp6_lease_unref(client->lease); |
1088 | client->lease = TAKE_PTR(lease); | |
631bbe71 PF |
1089 | r = 0; |
1090 | } | |
1091 | ||
7246333c PF |
1092 | if (pref_advertise == 255 || client->retransmit_count > 1) |
1093 | r = DHCP6_STATE_REQUEST; | |
1094 | ||
631bbe71 PF |
1095 | return r; |
1096 | } | |
1097 | ||
004845d1 LP |
1098 | static int client_receive_message( |
1099 | sd_event_source *s, | |
1100 | int fd, uint32_t | |
1101 | revents, | |
1102 | void *userdata) { | |
1103 | ||
631bbe71 | 1104 | sd_dhcp6_client *client = userdata; |
3f0c075f | 1105 | DHCP6_CLIENT_DONT_DESTROY(client); |
0d43d2fc | 1106 | _cleanup_free_ DHCP6Message *message = NULL; |
4edc2c9b LP |
1107 | ssize_t buflen, len; |
1108 | int r = 0; | |
631bbe71 PF |
1109 | |
1110 | assert(s); | |
1111 | assert(client); | |
1112 | assert(client->event); | |
1113 | ||
4edc2c9b | 1114 | buflen = next_datagram_size_fd(fd); |
22a3fd2d BG |
1115 | if (buflen == -ENETDOWN) { |
1116 | /* the link is down. Don't return an error or the I/O event | |
1117 | source will be disconnected and we won't be able to receive | |
1118 | packets again when the link comes back. */ | |
1119 | return 0; | |
1120 | } | |
4edc2c9b LP |
1121 | if (buflen < 0) |
1122 | return buflen; | |
631bbe71 | 1123 | |
0d43d2fc | 1124 | message = malloc(buflen); |
631bbe71 PF |
1125 | if (!message) |
1126 | return -ENOMEM; | |
1127 | ||
cf447cb6 | 1128 | len = recv(fd, message, buflen, 0); |
0d43d2fc | 1129 | if (len < 0) { |
22a3fd2d BG |
1130 | /* see comment above for why we shouldn't error out on ENETDOWN. */ |
1131 | if (IN_SET(errno, EAGAIN, EINTR, ENETDOWN)) | |
0d43d2fc TG |
1132 | return 0; |
1133 | ||
bd9a7221 | 1134 | return log_dhcp6_client_errno(client, errno, "Could not receive message from UDP socket: %m"); |
0d43d2fc | 1135 | |
004845d1 LP |
1136 | } |
1137 | if ((size_t) len < sizeof(DHCP6Message)) { | |
1138 | log_dhcp6_client(client, "Too small to be DHCP6 message: ignoring"); | |
631bbe71 | 1139 | return 0; |
004845d1 | 1140 | } |
631bbe71 PF |
1141 | |
1142 | switch(message->type) { | |
1143 | case DHCP6_SOLICIT: | |
1144 | case DHCP6_REQUEST: | |
1145 | case DHCP6_CONFIRM: | |
1146 | case DHCP6_RENEW: | |
1147 | case DHCP6_REBIND: | |
1148 | case DHCP6_RELEASE: | |
1149 | case DHCP6_DECLINE: | |
1150 | case DHCP6_INFORMATION_REQUEST: | |
1151 | case DHCP6_RELAY_FORW: | |
1152 | case DHCP6_RELAY_REPL: | |
1153 | return 0; | |
1154 | ||
1155 | case DHCP6_ADVERTISE: | |
1156 | case DHCP6_REPLY: | |
1157 | case DHCP6_RECONFIGURE: | |
1158 | break; | |
1159 | ||
1160 | default: | |
bd9a7221 | 1161 | log_dhcp6_client(client, "Unknown message type %d", message->type); |
631bbe71 PF |
1162 | return 0; |
1163 | } | |
1164 | ||
1165 | if (client->transaction_id != (message->transaction_id & | |
1166 | htobe32(0x00ffffff))) | |
1167 | return 0; | |
1168 | ||
1169 | switch (client->state) { | |
bbfa43ca PF |
1170 | case DHCP6_STATE_INFORMATION_REQUEST: |
1171 | r = client_receive_reply(client, message, len); | |
1172 | if (r < 0) | |
1173 | return 0; | |
1174 | ||
10c9ce61 | 1175 | client_notify(client, SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST); |
bbfa43ca PF |
1176 | |
1177 | client_start(client, DHCP6_STATE_STOPPED); | |
1178 | ||
1179 | break; | |
1180 | ||
631bbe71 PF |
1181 | case DHCP6_STATE_SOLICITATION: |
1182 | r = client_receive_advertise(client, message, len); | |
1183 | ||
ed6ee219 | 1184 | if (r == DHCP6_STATE_REQUEST) { |
7246333c PF |
1185 | client_start(client, r); |
1186 | ||
ed6ee219 PF |
1187 | break; |
1188 | } | |
631bbe71 | 1189 | |
4831981d | 1190 | _fallthrough_; /* for Soliciation Rapid Commit option check */ |
7246333c | 1191 | case DHCP6_STATE_REQUEST: |
3dc34fcc PF |
1192 | case DHCP6_STATE_RENEW: |
1193 | case DHCP6_STATE_REBIND: | |
1194 | ||
a34b57c0 PF |
1195 | r = client_receive_reply(client, message, len); |
1196 | if (r < 0) | |
1197 | return 0; | |
1198 | ||
1199 | if (r == DHCP6_STATE_BOUND) { | |
1200 | ||
1201 | r = client_start(client, DHCP6_STATE_BOUND); | |
1202 | if (r < 0) { | |
1203 | client_stop(client, r); | |
1204 | return 0; | |
1205 | } | |
1206 | ||
10c9ce61 | 1207 | client_notify(client, SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE); |
a34b57c0 PF |
1208 | } |
1209 | ||
1210 | break; | |
1211 | ||
1212 | case DHCP6_STATE_BOUND: | |
1213 | ||
1214 | break; | |
1215 | ||
631bbe71 | 1216 | case DHCP6_STATE_STOPPED: |
631bbe71 PF |
1217 | return 0; |
1218 | } | |
1219 | ||
712fdfd6 YW |
1220 | log_dhcp6_client(client, "Recv %s", |
1221 | dhcp6_message_type_to_string(message->type)); | |
631bbe71 | 1222 | |
a9aff361 PF |
1223 | return 0; |
1224 | } | |
1225 | ||
134ebaa4 PF |
1226 | static int client_get_lifetime(sd_dhcp6_client *client, uint32_t *lifetime_t1, |
1227 | uint32_t *lifetime_t2) { | |
1228 | assert_return(client, -EINVAL); | |
1229 | assert_return(client->lease, -EINVAL); | |
1230 | ||
1231 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA) && client->lease->ia.addresses) { | |
1232 | *lifetime_t1 = be32toh(client->lease->ia.ia_na.lifetime_t1); | |
1233 | *lifetime_t2 = be32toh(client->lease->ia.ia_na.lifetime_t2); | |
1234 | ||
1235 | return 0; | |
1236 | } | |
1237 | ||
1238 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD) && client->lease->pd.addresses) { | |
1239 | *lifetime_t1 = be32toh(client->lease->pd.ia_pd.lifetime_t1); | |
1240 | *lifetime_t2 = be32toh(client->lease->pd.ia_pd.lifetime_t2); | |
1241 | ||
1242 | return 0; | |
1243 | } | |
1244 | ||
1245 | return -ENOMSG; | |
1246 | } | |
1247 | ||
0ae0e5cd | 1248 | static int client_start(sd_dhcp6_client *client, enum DHCP6State state) { |
f12abb48 | 1249 | int r; |
a34b57c0 PF |
1250 | usec_t timeout, time_now; |
1251 | char time_string[FORMAT_TIMESPAN_MAX]; | |
134ebaa4 | 1252 | uint32_t lifetime_t1, lifetime_t2; |
f12abb48 PF |
1253 | |
1254 | assert_return(client, -EINVAL); | |
1255 | assert_return(client->event, -EINVAL); | |
2f8e7633 | 1256 | assert_return(client->ifindex > 0, -EINVAL); |
c3e2adea | 1257 | assert_return(client->state != state, -EINVAL); |
f12abb48 | 1258 | |
c9393e8c YW |
1259 | (void) event_source_disable(client->timeout_resend_expire); |
1260 | (void) event_source_disable(client->timeout_resend); | |
c3e2adea PF |
1261 | client->retransmit_time = 0; |
1262 | client->retransmit_count = 0; | |
f12abb48 | 1263 | |
38a03f06 LP |
1264 | r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now); |
1265 | if (r < 0) | |
1266 | return r; | |
346e13a2 | 1267 | |
7ac6c26a PF |
1268 | if (!client->receive_message) { |
1269 | r = sd_event_add_io(client->event, &client->receive_message, | |
1270 | client->fd, EPOLLIN, client_receive_message, | |
1271 | client); | |
1272 | if (r < 0) | |
1273 | goto error; | |
1274 | ||
1275 | r = sd_event_source_set_priority(client->receive_message, | |
1276 | client->event_priority); | |
1277 | if (r < 0) | |
1278 | goto error; | |
1279 | ||
1280 | r = sd_event_source_set_description(client->receive_message, | |
1281 | "dhcp6-receive-message"); | |
1282 | if (r < 0) | |
1283 | goto error; | |
1284 | } | |
1285 | ||
c3e2adea PF |
1286 | switch (state) { |
1287 | case DHCP6_STATE_STOPPED: | |
bbfa43ca PF |
1288 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { |
1289 | client->state = DHCP6_STATE_STOPPED; | |
a9aff361 | 1290 | |
bbfa43ca PF |
1291 | return 0; |
1292 | } | |
9021bb9f | 1293 | |
4831981d | 1294 | _fallthrough_; |
bbfa43ca | 1295 | case DHCP6_STATE_SOLICITATION: |
c3e2adea PF |
1296 | client->state = DHCP6_STATE_SOLICITATION; |
1297 | ||
7246333c PF |
1298 | break; |
1299 | ||
bbfa43ca | 1300 | case DHCP6_STATE_INFORMATION_REQUEST: |
7246333c | 1301 | case DHCP6_STATE_REQUEST: |
3dc34fcc PF |
1302 | case DHCP6_STATE_RENEW: |
1303 | case DHCP6_STATE_REBIND: | |
a34b57c0 | 1304 | |
7246333c PF |
1305 | client->state = state; |
1306 | ||
c3e2adea | 1307 | break; |
a34b57c0 PF |
1308 | |
1309 | case DHCP6_STATE_BOUND: | |
1310 | ||
134ebaa4 PF |
1311 | r = client_get_lifetime(client, &lifetime_t1, &lifetime_t2); |
1312 | if (r < 0) | |
1313 | goto error; | |
a34b57c0 | 1314 | |
134ebaa4 | 1315 | if (lifetime_t1 == 0xffffffff || lifetime_t2 == 0xffffffff) { |
bd9a7221 | 1316 | log_dhcp6_client(client, "Infinite T1 0x%08x or T2 0x%08x", |
134ebaa4 | 1317 | lifetime_t1, lifetime_t2); |
a34b57c0 PF |
1318 | |
1319 | return 0; | |
1320 | } | |
1321 | ||
134ebaa4 | 1322 | timeout = client_timeout_compute_random(lifetime_t1 * USEC_PER_SEC); |
a34b57c0 PF |
1323 | |
1324 | log_dhcp6_client(client, "T1 expires in %s", | |
ed19c567 | 1325 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC)); |
a34b57c0 | 1326 | |
c9393e8c YW |
1327 | r = event_reset_time(client->event, &client->timeout_t1, |
1328 | clock_boottime_or_monotonic(), | |
1329 | time_now + timeout, 10 * USEC_PER_SEC, | |
1330 | client_timeout_t1, client, | |
1331 | client->event_priority, "dhcp6-t1-timeout", true); | |
9021bb9f | 1332 | if (r < 0) |
7ac6c26a | 1333 | goto error; |
9021bb9f | 1334 | |
134ebaa4 | 1335 | timeout = client_timeout_compute_random(lifetime_t2 * USEC_PER_SEC); |
a34b57c0 PF |
1336 | |
1337 | log_dhcp6_client(client, "T2 expires in %s", | |
ed19c567 | 1338 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC)); |
a34b57c0 | 1339 | |
c9393e8c YW |
1340 | r = event_reset_time(client->event, &client->timeout_t2, |
1341 | clock_boottime_or_monotonic(), | |
1342 | time_now + timeout, 10 * USEC_PER_SEC, | |
1343 | client_timeout_t2, client, | |
1344 | client->event_priority, "dhcp6-t2-timeout", true); | |
9021bb9f | 1345 | if (r < 0) |
7ac6c26a | 1346 | goto error; |
9021bb9f | 1347 | |
3dc34fcc PF |
1348 | client->state = state; |
1349 | ||
a34b57c0 | 1350 | return 0; |
c3e2adea | 1351 | } |
a9aff361 | 1352 | |
c3e2adea | 1353 | client->transaction_id = random_u32() & htobe32(0x00ffffff); |
346e13a2 | 1354 | client->transaction_start = time_now; |
d1b0afe3 | 1355 | |
c9393e8c YW |
1356 | r = event_reset_time(client->event, &client->timeout_resend, |
1357 | clock_boottime_or_monotonic(), | |
1358 | 0, 0, | |
1359 | client_timeout_resend, client, | |
1360 | client->event_priority, "dhcp6-resend-timeout", true); | |
9021bb9f | 1361 | if (r < 0) |
7ac6c26a | 1362 | goto error; |
9021bb9f | 1363 | |
f12abb48 | 1364 | return 0; |
7ac6c26a PF |
1365 | |
1366 | error: | |
1367 | client_reset(client); | |
1368 | return r; | |
f12abb48 PF |
1369 | } |
1370 | ||
0ae0e5cd | 1371 | int sd_dhcp6_client_stop(sd_dhcp6_client *client) { |
f667c150 TG |
1372 | assert_return(client, -EINVAL); |
1373 | ||
10c9ce61 | 1374 | client_stop(client, SD_DHCP6_CLIENT_EVENT_STOP); |
139b011a | 1375 | |
7ac6c26a PF |
1376 | client->fd = safe_close(client->fd); |
1377 | ||
139b011a PF |
1378 | return 0; |
1379 | } | |
1380 | ||
f667c150 TG |
1381 | int sd_dhcp6_client_is_running(sd_dhcp6_client *client) { |
1382 | assert_return(client, -EINVAL); | |
1383 | ||
1384 | return client->state != DHCP6_STATE_STOPPED; | |
1385 | } | |
1386 | ||
0ae0e5cd | 1387 | int sd_dhcp6_client_start(sd_dhcp6_client *client) { |
bbfa43ca | 1388 | enum DHCP6State state = DHCP6_STATE_SOLICITATION; |
2f8e7633 | 1389 | int r = 0; |
139b011a PF |
1390 | |
1391 | assert_return(client, -EINVAL); | |
1392 | assert_return(client->event, -EINVAL); | |
2f8e7633 | 1393 | assert_return(client->ifindex > 0, -EINVAL); |
c601ebf7 | 1394 | assert_return(in_addr_is_link_local(AF_INET6, (const union in_addr_union *) &client->local_address) > 0, -EINVAL); |
139b011a | 1395 | |
d7c9c21f | 1396 | if (!IN_SET(client->state, DHCP6_STATE_STOPPED)) |
63348d13 | 1397 | return -EBUSY; |
d7c9c21f | 1398 | |
f311a62b PF |
1399 | if (!client->information_request && !client->request) |
1400 | return -EINVAL; | |
1401 | ||
c806ffb9 | 1402 | r = client_reset(client); |
f12abb48 PF |
1403 | if (r < 0) |
1404 | return r; | |
1405 | ||
bbfa43ca PF |
1406 | r = client_ensure_iaid(client); |
1407 | if (r < 0) | |
1408 | return r; | |
1409 | ||
cc22955c TH |
1410 | r = client_ensure_duid(client); |
1411 | if (r < 0) | |
1412 | return r; | |
1413 | ||
10a0f27b PF |
1414 | if (client->fd < 0) { |
1415 | r = dhcp6_network_bind_udp_socket(client->ifindex, &client->local_address); | |
1416 | if (r < 0) { | |
1417 | _cleanup_free_ char *p = NULL; | |
1418 | ||
1419 | (void) in_addr_to_string(AF_INET6, (const union in_addr_union*) &client->local_address, &p); | |
1420 | return log_dhcp6_client_errno(client, r, | |
1421 | "Failed to bind to UDP socket at address %s: %m", strna(p)); | |
1422 | } | |
bd9a7221 | 1423 | |
10a0f27b | 1424 | client->fd = r; |
bd9a7221 | 1425 | } |
bbfa43ca | 1426 | |
bbfa43ca PF |
1427 | if (client->information_request) |
1428 | state = DHCP6_STATE_INFORMATION_REQUEST; | |
1429 | ||
1430 | log_dhcp6_client(client, "Started in %s mode", | |
483d099e ZJS |
1431 | client->information_request? "Information request": |
1432 | "Managed"); | |
bbfa43ca PF |
1433 | |
1434 | return client_start(client, state); | |
139b011a PF |
1435 | } |
1436 | ||
32d20645 | 1437 | int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event, int64_t priority) { |
139b011a PF |
1438 | int r; |
1439 | ||
1440 | assert_return(client, -EINVAL); | |
1441 | assert_return(!client->event, -EBUSY); | |
1442 | ||
1443 | if (event) | |
1444 | client->event = sd_event_ref(event); | |
1445 | else { | |
1446 | r = sd_event_default(&client->event); | |
1447 | if (r < 0) | |
1448 | return 0; | |
1449 | } | |
1450 | ||
1451 | client->event_priority = priority; | |
1452 | ||
1453 | return 0; | |
1454 | } | |
1455 | ||
1456 | int sd_dhcp6_client_detach_event(sd_dhcp6_client *client) { | |
1457 | assert_return(client, -EINVAL); | |
1458 | ||
1459 | client->event = sd_event_unref(client->event); | |
1460 | ||
1461 | return 0; | |
1462 | } | |
1463 | ||
1464 | sd_event *sd_dhcp6_client_get_event(sd_dhcp6_client *client) { | |
a1140666 | 1465 | assert_return(client, NULL); |
139b011a PF |
1466 | |
1467 | return client->event; | |
1468 | } | |
1469 | ||
8301aa0b YW |
1470 | static sd_dhcp6_client *dhcp6_client_free(sd_dhcp6_client *client) { |
1471 | assert(client); | |
139b011a | 1472 | |
c9393e8c YW |
1473 | client->timeout_resend = sd_event_source_unref(client->timeout_resend); |
1474 | client->timeout_resend_expire = sd_event_source_unref(client->timeout_resend_expire); | |
1475 | client->timeout_t1 = sd_event_source_unref(client->timeout_t1); | |
1476 | client->timeout_t2 = sd_event_source_unref(client->timeout_t2); | |
1477 | ||
3733eec3 LP |
1478 | client_reset(client); |
1479 | ||
10a0f27b PF |
1480 | client->fd = safe_close(client->fd); |
1481 | ||
3733eec3 | 1482 | sd_dhcp6_client_detach_event(client); |
3733eec3 LP |
1483 | |
1484 | free(client->req_opts); | |
8006aa32 | 1485 | free(client->fqdn); |
6b430fdb | 1486 | return mfree(client); |
139b011a PF |
1487 | } |
1488 | ||
8301aa0b YW |
1489 | DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp6_client, sd_dhcp6_client, dhcp6_client_free); |
1490 | ||
0ae0e5cd | 1491 | int sd_dhcp6_client_new(sd_dhcp6_client **ret) { |
4afd3348 | 1492 | _cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL; |
8b8ecac8 | 1493 | _cleanup_free_ be16_t *req_opts = NULL; |
da6fe470 | 1494 | size_t t; |
139b011a PF |
1495 | |
1496 | assert_return(ret, -EINVAL); | |
1497 | ||
8b8ecac8 YW |
1498 | req_opts = new(be16_t, ELEMENTSOF(default_req_opts)); |
1499 | if (!req_opts) | |
139b011a PF |
1500 | return -ENOMEM; |
1501 | ||
8b8ecac8 YW |
1502 | for (t = 0; t < ELEMENTSOF(default_req_opts); t++) |
1503 | req_opts[t] = htobe16(default_req_opts[t]); | |
c806ffb9 | 1504 | |
8b8ecac8 YW |
1505 | client = new(sd_dhcp6_client, 1); |
1506 | if (!client) | |
da6fe470 PF |
1507 | return -ENOMEM; |
1508 | ||
8b8ecac8 YW |
1509 | *client = (sd_dhcp6_client) { |
1510 | .n_ref = 1, | |
1511 | .ia_na.type = SD_DHCP6_OPTION_IA_NA, | |
1512 | .ia_pd.type = SD_DHCP6_OPTION_IA_PD, | |
1513 | .ifindex = -1, | |
1514 | .request = DHCP6_REQUEST_IA_NA, | |
1515 | .fd = -1, | |
1516 | .req_opts_len = ELEMENTSOF(default_req_opts), | |
1517 | .req_opts = TAKE_PTR(req_opts), | |
1518 | }; | |
da6fe470 | 1519 | |
1cc6c93a | 1520 | *ret = TAKE_PTR(client); |
139b011a PF |
1521 | |
1522 | return 0; | |
1523 | } |