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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> |
8f815e8b | 9 | #include <linux/if_arp.h> |
76253e73 | 10 | #include <linux/if_infiniband.h> |
139b011a | 11 | |
139b011a | 12 | #include "sd-dhcp6-client.h" |
07630cea | 13 | |
b5efdb8a | 14 | #include "alloc-util.h" |
07630cea | 15 | #include "dhcp-identifier.h" |
f12abb48 | 16 | #include "dhcp6-internal.h" |
631bbe71 | 17 | #include "dhcp6-lease-internal.h" |
07630cea | 18 | #include "dhcp6-protocol.h" |
8006aa32 | 19 | #include "dns-domain.h" |
c9393e8c | 20 | #include "event-util.h" |
3ffd4af2 | 21 | #include "fd-util.h" |
8006aa32 | 22 | #include "hostname-util.h" |
c601ebf7 | 23 | #include "in-addr-util.h" |
07630cea LP |
24 | #include "network-internal.h" |
25 | #include "random-util.h" | |
4edc2c9b | 26 | #include "socket-util.h" |
8b43440b | 27 | #include "string-table.h" |
07630cea | 28 | #include "util.h" |
139b011a | 29 | |
76253e73 DW |
30 | #define MAX_MAC_ADDR_LEN INFINIBAND_ALEN |
31 | ||
6ffe71d0 YW |
32 | #define IRT_DEFAULT (1 * USEC_PER_DAY) |
33 | #define IRT_MINIMUM (600 * USEC_PER_SEC) | |
fcb51238 | 34 | |
f311a62b PF |
35 | /* what to request from the server, addresses (IA_NA) and/or prefixes (IA_PD) */ |
36 | enum { | |
37 | DHCP6_REQUEST_IA_NA = 1, | |
38 | DHCP6_REQUEST_IA_TA = 2, /* currently not used */ | |
39 | DHCP6_REQUEST_IA_PD = 4, | |
40 | }; | |
41 | ||
139b011a | 42 | struct sd_dhcp6_client { |
3733eec3 | 43 | unsigned n_ref; |
139b011a PF |
44 | |
45 | enum DHCP6State state; | |
46 | sd_event *event; | |
47 | int event_priority; | |
2f8e7633 | 48 | int ifindex; |
c601ebf7 | 49 | struct in6_addr local_address; |
76253e73 DW |
50 | uint8_t mac_addr[MAX_MAC_ADDR_LEN]; |
51 | size_t mac_addr_len; | |
52 | uint16_t arp_type; | |
f12abb48 | 53 | DHCP6IA ia_na; |
dce6563f | 54 | DHCP6IA ia_pd; |
9a7225de PF |
55 | sd_event_source *timeout_t1; |
56 | sd_event_source *timeout_t2; | |
1346489f | 57 | unsigned request; |
a9aff361 | 58 | be32_t transaction_id; |
346e13a2 | 59 | usec_t transaction_start; |
631bbe71 | 60 | struct sd_dhcp6_lease *lease; |
a9aff361 | 61 | int fd; |
bbfa43ca | 62 | bool information_request; |
8217ed5e | 63 | bool iaid_set; |
da6fe470 PF |
64 | be16_t *req_opts; |
65 | size_t req_opts_allocated; | |
66 | size_t req_opts_len; | |
8006aa32 | 67 | char *fqdn; |
a9aff361 | 68 | sd_event_source *receive_message; |
d1b0afe3 PF |
69 | usec_t retransmit_time; |
70 | uint8_t retransmit_count; | |
71 | sd_event_source *timeout_resend; | |
72 | sd_event_source *timeout_resend_expire; | |
45aa74c7 | 73 | sd_dhcp6_client_callback_t callback; |
139b011a | 74 | void *userdata; |
764aad62 | 75 | struct duid duid; |
66eac120 | 76 | size_t duid_len; |
fcb51238 YW |
77 | usec_t information_request_time_usec; |
78 | usec_t information_refresh_time_usec; | |
139b011a PF |
79 | }; |
80 | ||
da6fe470 | 81 | static const uint16_t default_req_opts[] = { |
2c1ab8ca BG |
82 | SD_DHCP6_OPTION_DNS_SERVERS, |
83 | SD_DHCP6_OPTION_DOMAIN_LIST, | |
84 | SD_DHCP6_OPTION_NTP_SERVER, | |
85 | SD_DHCP6_OPTION_SNTP_SERVERS, | |
da6fe470 PF |
86 | }; |
87 | ||
a9aff361 PF |
88 | const char * dhcp6_message_type_table[_DHCP6_MESSAGE_MAX] = { |
89 | [DHCP6_SOLICIT] = "SOLICIT", | |
90 | [DHCP6_ADVERTISE] = "ADVERTISE", | |
91 | [DHCP6_REQUEST] = "REQUEST", | |
92 | [DHCP6_CONFIRM] = "CONFIRM", | |
93 | [DHCP6_RENEW] = "RENEW", | |
94 | [DHCP6_REBIND] = "REBIND", | |
95 | [DHCP6_REPLY] = "REPLY", | |
96 | [DHCP6_RELEASE] = "RELEASE", | |
97 | [DHCP6_DECLINE] = "DECLINE", | |
98 | [DHCP6_RECONFIGURE] = "RECONFIGURE", | |
99 | [DHCP6_INFORMATION_REQUEST] = "INFORMATION-REQUEST", | |
100 | [DHCP6_RELAY_FORW] = "RELAY-FORW", | |
101 | [DHCP6_RELAY_REPL] = "RELAY-REPL", | |
102 | }; | |
103 | ||
104 | DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_type, int); | |
105 | ||
631bbe71 PF |
106 | const char * dhcp6_message_status_table[_DHCP6_STATUS_MAX] = { |
107 | [DHCP6_STATUS_SUCCESS] = "Success", | |
108 | [DHCP6_STATUS_UNSPEC_FAIL] = "Unspecified failure", | |
109 | [DHCP6_STATUS_NO_ADDRS_AVAIL] = "No addresses available", | |
110 | [DHCP6_STATUS_NO_BINDING] = "Binding unavailable", | |
111 | [DHCP6_STATUS_NOT_ON_LINK] = "Not on link", | |
112 | [DHCP6_STATUS_USE_MULTICAST] = "Use multicast", | |
113 | }; | |
114 | ||
115 | DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_status, int); | |
116 | ||
3f0c075f | 117 | #define DHCP6_CLIENT_DONT_DESTROY(client) \ |
4afd3348 | 118 | _cleanup_(sd_dhcp6_client_unrefp) _unused_ sd_dhcp6_client *_dont_destroy_##client = sd_dhcp6_client_ref(client) |
3f0c075f | 119 | |
c3e2adea PF |
120 | static int client_start(sd_dhcp6_client *client, enum DHCP6State state); |
121 | ||
4b558378 ZJS |
122 | int sd_dhcp6_client_set_callback( |
123 | sd_dhcp6_client *client, | |
124 | sd_dhcp6_client_callback_t cb, | |
125 | void *userdata) { | |
45aa74c7 | 126 | |
139b011a PF |
127 | assert_return(client, -EINVAL); |
128 | ||
45aa74c7 | 129 | client->callback = cb; |
139b011a PF |
130 | client->userdata = userdata; |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
2f8e7633 | 135 | int sd_dhcp6_client_set_ifindex(sd_dhcp6_client *client, int ifindex) { |
139b011a | 136 | |
2f8e7633 LP |
137 | assert_return(client, -EINVAL); |
138 | assert_return(ifindex >= -1, -EINVAL); | |
d7c9c21f PF |
139 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
140 | ||
2f8e7633 | 141 | client->ifindex = ifindex; |
139b011a PF |
142 | return 0; |
143 | } | |
144 | ||
4b558378 ZJS |
145 | int sd_dhcp6_client_set_local_address( |
146 | sd_dhcp6_client *client, | |
147 | const struct in6_addr *local_address) { | |
148 | ||
c601ebf7 TG |
149 | assert_return(client, -EINVAL); |
150 | assert_return(local_address, -EINVAL); | |
151 | assert_return(in_addr_is_link_local(AF_INET6, (const union in_addr_union *) local_address) > 0, -EINVAL); | |
152 | ||
153 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); | |
154 | ||
155 | client->local_address = *local_address; | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
0ae0e5cd LP |
160 | int sd_dhcp6_client_set_mac( |
161 | sd_dhcp6_client *client, | |
162 | const uint8_t *addr, size_t addr_len, | |
163 | uint16_t arp_type) { | |
164 | ||
139b011a | 165 | assert_return(client, -EINVAL); |
76253e73 DW |
166 | assert_return(addr, -EINVAL); |
167 | assert_return(addr_len > 0 && addr_len <= MAX_MAC_ADDR_LEN, -EINVAL); | |
168 | assert_return(arp_type > 0, -EINVAL); | |
169 | ||
d7c9c21f PF |
170 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
171 | ||
76253e73 DW |
172 | if (arp_type == ARPHRD_ETHER) |
173 | assert_return(addr_len == ETH_ALEN, -EINVAL); | |
174 | else if (arp_type == ARPHRD_INFINIBAND) | |
175 | assert_return(addr_len == INFINIBAND_ALEN, -EINVAL); | |
139b011a | 176 | else |
76253e73 DW |
177 | return -EINVAL; |
178 | ||
179 | if (client->mac_addr_len == addr_len && | |
180 | memcmp(&client->mac_addr, addr, addr_len) == 0) | |
181 | return 0; | |
182 | ||
183 | memcpy(&client->mac_addr, addr, addr_len); | |
184 | client->mac_addr_len = addr_len; | |
185 | client->arp_type = arp_type; | |
139b011a PF |
186 | |
187 | return 0; | |
188 | } | |
189 | ||
0ae0e5cd | 190 | static int client_ensure_duid(sd_dhcp6_client *client) { |
cc22955c TH |
191 | if (client->duid_len != 0) |
192 | return 0; | |
0ae0e5cd | 193 | |
cc22955c TH |
194 | return dhcp_identifier_set_duid_en(&client->duid, &client->duid_len); |
195 | } | |
196 | ||
d7df2fd3 ZJS |
197 | /** |
198 | * Sets DUID. If duid is non-null, the DUID is set to duid_type + duid | |
199 | * without further modification. Otherwise, if duid_type is supported, DUID | |
200 | * is set based on that type. Otherwise, an error is returned. | |
201 | */ | |
7e90a499 | 202 | static int dhcp6_client_set_duid_internal( |
4b558378 ZJS |
203 | sd_dhcp6_client *client, |
204 | uint16_t duid_type, | |
f7a92d1a | 205 | const void *duid, |
7e90a499 YW |
206 | size_t duid_len, |
207 | usec_t llt_time) { | |
413708d1 | 208 | int r; |
27eba50e | 209 | |
66eac120 | 210 | assert_return(client, -EINVAL); |
d7df2fd3 | 211 | assert_return(duid_len == 0 || duid != NULL, -EINVAL); |
afec4539 | 212 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
c83321e6 | 213 | |
d7df2fd3 | 214 | if (duid != NULL) { |
ab4a88bc TH |
215 | r = dhcp_validate_duid_len(duid_type, duid_len, true); |
216 | if (r < 0) { | |
217 | r = dhcp_validate_duid_len(duid_type, duid_len, false); | |
218 | if (r < 0) | |
219 | return r; | |
220 | log_dhcp6_client(client, "Setting DUID of type %u with unexpected content", duid_type); | |
221 | } | |
d7df2fd3 | 222 | |
413708d1 VK |
223 | client->duid.type = htobe16(duid_type); |
224 | memcpy(&client->duid.raw.data, duid, duid_len); | |
d7df2fd3 | 225 | client->duid_len = sizeof(client->duid.type) + duid_len; |
d7df2fd3 | 226 | } else |
27eba50e | 227 | switch (duid_type) { |
335f80a6 | 228 | case DUID_TYPE_LLT: |
339697f0 | 229 | if (client->mac_addr_len == 0) |
335f80a6 YW |
230 | return -EOPNOTSUPP; |
231 | ||
53253d9c | 232 | 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 |
233 | if (r < 0) |
234 | return r; | |
235 | break; | |
27eba50e YW |
236 | case DUID_TYPE_EN: |
237 | r = dhcp_identifier_set_duid_en(&client->duid, &client->duid_len); | |
238 | if (r < 0) | |
239 | return r; | |
240 | break; | |
335f80a6 | 241 | case DUID_TYPE_LL: |
339697f0 | 242 | if (client->mac_addr_len == 0) |
335f80a6 YW |
243 | return -EOPNOTSUPP; |
244 | ||
245 | r = dhcp_identifier_set_duid_ll(&client->duid, client->mac_addr, client->mac_addr_len, client->arp_type, &client->duid_len); | |
246 | if (r < 0) | |
247 | return r; | |
248 | break; | |
27eba50e YW |
249 | case DUID_TYPE_UUID: |
250 | r = dhcp_identifier_set_duid_uuid(&client->duid, &client->duid_len); | |
251 | if (r < 0) | |
252 | return r; | |
253 | break; | |
254 | default: | |
335f80a6 | 255 | return -EINVAL; |
27eba50e | 256 | } |
fe4b2156 | 257 | |
413708d1 VK |
258 | return 0; |
259 | } | |
260 | ||
7e90a499 YW |
261 | int sd_dhcp6_client_set_duid( |
262 | sd_dhcp6_client *client, | |
263 | uint16_t duid_type, | |
264 | const void *duid, | |
265 | size_t duid_len) { | |
266 | return dhcp6_client_set_duid_internal(client, duid_type, duid, duid_len, 0); | |
267 | } | |
268 | ||
269 | int sd_dhcp6_client_set_duid_llt( | |
270 | sd_dhcp6_client *client, | |
271 | usec_t llt_time) { | |
272 | return dhcp6_client_set_duid_internal(client, DUID_TYPE_LLT, NULL, 0, llt_time); | |
273 | } | |
274 | ||
413708d1 VK |
275 | int sd_dhcp6_client_set_iaid(sd_dhcp6_client *client, uint32_t iaid) { |
276 | assert_return(client, -EINVAL); | |
277 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); | |
278 | ||
e0026dcb | 279 | client->ia_na.ia_na.id = htobe32(iaid); |
dce6563f | 280 | client->ia_pd.ia_pd.id = htobe32(iaid); |
8217ed5e | 281 | client->iaid_set = true; |
66eac120 DW |
282 | |
283 | return 0; | |
284 | } | |
285 | ||
8006aa32 SA |
286 | int sd_dhcp6_client_set_fqdn( |
287 | sd_dhcp6_client *client, | |
288 | const char *fqdn) { | |
289 | ||
290 | assert_return(client, -EINVAL); | |
291 | ||
292 | /* Make sure FQDN qualifies as DNS and as Linux hostname */ | |
293 | if (fqdn && | |
294 | !(hostname_is_valid(fqdn, false) && dns_name_is_valid(fqdn) > 0)) | |
295 | return -EINVAL; | |
296 | ||
297 | return free_and_strdup(&client->fqdn, fqdn); | |
298 | } | |
299 | ||
04c01369 | 300 | int sd_dhcp6_client_set_information_request(sd_dhcp6_client *client, int enabled) { |
bbfa43ca | 301 | assert_return(client, -EINVAL); |
d7c9c21f PF |
302 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
303 | ||
bbfa43ca PF |
304 | client->information_request = enabled; |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
04c01369 | 309 | int sd_dhcp6_client_get_information_request(sd_dhcp6_client *client, int *enabled) { |
bbfa43ca PF |
310 | assert_return(client, -EINVAL); |
311 | assert_return(enabled, -EINVAL); | |
312 | ||
313 | *enabled = client->information_request; | |
314 | ||
315 | return 0; | |
316 | } | |
317 | ||
0ae0e5cd | 318 | int sd_dhcp6_client_set_request_option(sd_dhcp6_client *client, uint16_t option) { |
da6fe470 PF |
319 | size_t t; |
320 | ||
321 | assert_return(client, -EINVAL); | |
322 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
323 | ||
324 | switch(option) { | |
a1140666 | 325 | |
2c1ab8ca BG |
326 | case SD_DHCP6_OPTION_DNS_SERVERS: |
327 | case SD_DHCP6_OPTION_DOMAIN_LIST: | |
328 | case SD_DHCP6_OPTION_SNTP_SERVERS: | |
329 | case SD_DHCP6_OPTION_NTP_SERVER: | |
fb5c8216 | 330 | case SD_DHCP6_OPTION_RAPID_COMMIT: |
da6fe470 PF |
331 | break; |
332 | ||
333 | default: | |
334 | return -EINVAL; | |
335 | } | |
336 | ||
337 | for (t = 0; t < client->req_opts_len; t++) | |
338 | if (client->req_opts[t] == htobe16(option)) | |
339 | return -EEXIST; | |
340 | ||
341 | if (!GREEDY_REALLOC(client->req_opts, client->req_opts_allocated, | |
342 | client->req_opts_len + 1)) | |
343 | return -ENOMEM; | |
344 | ||
345 | client->req_opts[client->req_opts_len++] = htobe16(option); | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
d8c51121 PF |
350 | int sd_dhcp6_client_get_prefix_delegation(sd_dhcp6_client *client, int *delegation) { |
351 | assert_return(client, -EINVAL); | |
352 | assert_return(delegation, -EINVAL); | |
353 | ||
f311a62b | 354 | *delegation = FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD); |
d8c51121 PF |
355 | |
356 | return 0; | |
357 | } | |
358 | ||
359 | int sd_dhcp6_client_set_prefix_delegation(sd_dhcp6_client *client, int delegation) { | |
7c3de8f8 PF |
360 | assert_return(client, -EINVAL); |
361 | ||
f311a62b PF |
362 | SET_FLAG(client->request, DHCP6_REQUEST_IA_PD, delegation); |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
367 | int sd_dhcp6_client_get_address_request(sd_dhcp6_client *client, int *request) { | |
368 | assert_return(client, -EINVAL); | |
369 | assert_return(request, -EINVAL); | |
370 | ||
371 | *request = FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA); | |
372 | ||
373 | return 0; | |
374 | } | |
375 | ||
376 | int sd_dhcp6_client_set_address_request(sd_dhcp6_client *client, int request) { | |
377 | assert_return(client, -EINVAL); | |
378 | ||
379 | SET_FLAG(client->request, DHCP6_REQUEST_IA_NA, request); | |
7c3de8f8 PF |
380 | |
381 | return 0; | |
382 | } | |
383 | ||
b62f9008 | 384 | int sd_dhcp6_client_set_transaction_id(sd_dhcp6_client *client, uint32_t transaction_id) { |
d89a400e EV |
385 | assert_return(client, -EINVAL); |
386 | ||
387 | client->transaction_id = transaction_id; | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
ea3b3a75 PF |
392 | int sd_dhcp6_client_get_lease(sd_dhcp6_client *client, sd_dhcp6_lease **ret) { |
393 | assert_return(client, -EINVAL); | |
ea3b3a75 PF |
394 | |
395 | if (!client->lease) | |
396 | return -ENOMSG; | |
397 | ||
3098562c TG |
398 | if (ret) |
399 | *ret = client->lease; | |
ea3b3a75 PF |
400 | |
401 | return 0; | |
402 | } | |
403 | ||
3f0c075f | 404 | static void client_notify(sd_dhcp6_client *client, int event) { |
45aa74c7 LP |
405 | assert(client); |
406 | ||
407 | if (client->callback) | |
408 | client->callback(client, event, client->userdata); | |
139b011a PF |
409 | } |
410 | ||
f8908727 | 411 | static int client_reset(sd_dhcp6_client *client) { |
a1140666 | 412 | assert(client); |
f8908727 | 413 | |
431a4bc8 | 414 | client->lease = sd_dhcp6_lease_unref(client->lease); |
4e3e6679 | 415 | |
a9aff361 PF |
416 | client->receive_message = |
417 | sd_event_source_unref(client->receive_message); | |
418 | ||
c3e2adea | 419 | client->transaction_id = 0; |
346e13a2 | 420 | client->transaction_start = 0; |
a9aff361 | 421 | |
d1b0afe3 PF |
422 | client->retransmit_time = 0; |
423 | client->retransmit_count = 0; | |
d1b0afe3 | 424 | |
c9393e8c YW |
425 | (void) event_source_disable(client->timeout_resend); |
426 | (void) event_source_disable(client->timeout_resend_expire); | |
427 | (void) event_source_disable(client->timeout_t1); | |
428 | (void) event_source_disable(client->timeout_t2); | |
213e759a | 429 | |
139b011a PF |
430 | client->state = DHCP6_STATE_STOPPED; |
431 | ||
432 | return 0; | |
433 | } | |
434 | ||
3f0c075f PF |
435 | static void client_stop(sd_dhcp6_client *client, int error) { |
436 | DHCP6_CLIENT_DONT_DESTROY(client); | |
139b011a | 437 | |
3f0c075f | 438 | assert(client); |
139b011a | 439 | |
3f0c075f PF |
440 | client_notify(client, error); |
441 | ||
442 | client_reset(client); | |
139b011a PF |
443 | } |
444 | ||
346e13a2 | 445 | static int client_send_message(sd_dhcp6_client *client, usec_t time_now) { |
a9aff361 PF |
446 | _cleanup_free_ DHCP6Message *message = NULL; |
447 | struct in6_addr all_servers = | |
448 | IN6ADDR_ALL_DHCP6_RELAY_AGENTS_AND_SERVERS_INIT; | |
449 | size_t len, optlen = 512; | |
450 | uint8_t *opt; | |
451 | int r; | |
346e13a2 PF |
452 | usec_t elapsed_usec; |
453 | be16_t elapsed_time; | |
a9aff361 | 454 | |
a1140666 LP |
455 | assert(client); |
456 | ||
a9aff361 PF |
457 | len = sizeof(DHCP6Message) + optlen; |
458 | ||
459 | message = malloc0(len); | |
460 | if (!message) | |
461 | return -ENOMEM; | |
462 | ||
463 | opt = (uint8_t *)(message + 1); | |
464 | ||
465 | message->transaction_id = client->transaction_id; | |
466 | ||
467 | switch(client->state) { | |
bbfa43ca PF |
468 | case DHCP6_STATE_INFORMATION_REQUEST: |
469 | message->type = DHCP6_INFORMATION_REQUEST; | |
470 | ||
471 | break; | |
472 | ||
a9aff361 PF |
473 | case DHCP6_STATE_SOLICITATION: |
474 | message->type = DHCP6_SOLICIT; | |
475 | ||
ed6ee219 | 476 | r = dhcp6_option_append(&opt, &optlen, |
2c1ab8ca | 477 | SD_DHCP6_OPTION_RAPID_COMMIT, 0, NULL); |
926695f1 TA |
478 | if (r < 0) |
479 | return r; | |
ed6ee219 | 480 | |
f311a62b PF |
481 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
482 | r = dhcp6_option_append_ia(&opt, &optlen, | |
483 | &client->ia_na); | |
484 | if (r < 0) | |
485 | return r; | |
486 | } | |
a9aff361 | 487 | |
8006aa32 SA |
488 | if (client->fqdn) { |
489 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
490 | if (r < 0) | |
491 | return r; | |
492 | } | |
493 | ||
f311a62b | 494 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
7c3de8f8 PF |
495 | r = dhcp6_option_append_pd(opt, optlen, &client->ia_pd); |
496 | if (r < 0) | |
497 | return r; | |
498 | ||
499 | opt += r; | |
500 | optlen -= r; | |
501 | } | |
502 | ||
7246333c PF |
503 | break; |
504 | ||
505 | case DHCP6_STATE_REQUEST: | |
3dc34fcc PF |
506 | case DHCP6_STATE_RENEW: |
507 | ||
508 | if (client->state == DHCP6_STATE_REQUEST) | |
509 | message->type = DHCP6_REQUEST; | |
510 | else | |
511 | message->type = DHCP6_RENEW; | |
7246333c | 512 | |
2c1ab8ca | 513 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_SERVERID, |
7246333c PF |
514 | client->lease->serverid_len, |
515 | client->lease->serverid); | |
516 | if (r < 0) | |
517 | return r; | |
518 | ||
f311a62b PF |
519 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
520 | r = dhcp6_option_append_ia(&opt, &optlen, | |
521 | &client->lease->ia); | |
522 | if (r < 0) | |
523 | return r; | |
524 | } | |
a9aff361 | 525 | |
8006aa32 SA |
526 | if (client->fqdn) { |
527 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
528 | if (r < 0) | |
529 | return r; | |
530 | } | |
531 | ||
f311a62b | 532 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
7c3de8f8 PF |
533 | r = dhcp6_option_append_pd(opt, optlen, &client->lease->pd); |
534 | if (r < 0) | |
535 | return r; | |
536 | ||
537 | opt += r; | |
538 | optlen -= r; | |
539 | } | |
540 | ||
a9aff361 PF |
541 | break; |
542 | ||
3dc34fcc PF |
543 | case DHCP6_STATE_REBIND: |
544 | message->type = DHCP6_REBIND; | |
545 | ||
f311a62b PF |
546 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
547 | r = dhcp6_option_append_ia(&opt, &optlen, &client->lease->ia); | |
548 | if (r < 0) | |
549 | return r; | |
550 | } | |
3dc34fcc | 551 | |
8006aa32 SA |
552 | if (client->fqdn) { |
553 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
554 | if (r < 0) | |
555 | return r; | |
556 | } | |
557 | ||
f311a62b | 558 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
7c3de8f8 PF |
559 | r = dhcp6_option_append_pd(opt, optlen, &client->lease->pd); |
560 | if (r < 0) | |
561 | return r; | |
562 | ||
563 | opt += r; | |
564 | optlen -= r; | |
565 | } | |
566 | ||
3dc34fcc PF |
567 | break; |
568 | ||
a9aff361 | 569 | case DHCP6_STATE_STOPPED: |
a34b57c0 | 570 | case DHCP6_STATE_BOUND: |
a9aff361 PF |
571 | return -EINVAL; |
572 | } | |
573 | ||
2c1ab8ca | 574 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ORO, |
da6fe470 PF |
575 | client->req_opts_len * sizeof(be16_t), |
576 | client->req_opts); | |
577 | if (r < 0) | |
578 | return r; | |
579 | ||
ccd1fc2f | 580 | assert(client->duid_len); |
2c1ab8ca | 581 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_CLIENTID, |
66eac120 | 582 | client->duid_len, &client->duid); |
7246333c PF |
583 | if (r < 0) |
584 | return r; | |
585 | ||
346e13a2 PF |
586 | elapsed_usec = time_now - client->transaction_start; |
587 | if (elapsed_usec < 0xffff * USEC_PER_MSEC * 10) | |
588 | elapsed_time = htobe16(elapsed_usec / USEC_PER_MSEC / 10); | |
589 | else | |
590 | elapsed_time = 0xffff; | |
591 | ||
2c1ab8ca | 592 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ELAPSED_TIME, |
346e13a2 PF |
593 | sizeof(elapsed_time), &elapsed_time); |
594 | if (r < 0) | |
595 | return r; | |
596 | ||
a9aff361 PF |
597 | r = dhcp6_network_send_udp_socket(client->fd, &all_servers, message, |
598 | len - optlen); | |
599 | if (r < 0) | |
600 | return r; | |
601 | ||
602 | log_dhcp6_client(client, "Sent %s", | |
603 | dhcp6_message_type_to_string(message->type)); | |
604 | ||
605 | return 0; | |
606 | } | |
607 | ||
4b558378 | 608 | static int client_timeout_t2(sd_event_source *s, uint64_t usec, void *userdata) { |
a34b57c0 PF |
609 | sd_dhcp6_client *client = userdata; |
610 | ||
a1140666 LP |
611 | assert(s); |
612 | assert(client); | |
613 | assert(client->lease); | |
a34b57c0 | 614 | |
c9393e8c | 615 | (void) event_source_disable(client->timeout_t2); |
a34b57c0 PF |
616 | |
617 | log_dhcp6_client(client, "Timeout T2"); | |
618 | ||
3dc34fcc PF |
619 | client_start(client, DHCP6_STATE_REBIND); |
620 | ||
a34b57c0 PF |
621 | return 0; |
622 | } | |
623 | ||
4b558378 | 624 | static int client_timeout_t1(sd_event_source *s, uint64_t usec, void *userdata) { |
a34b57c0 PF |
625 | sd_dhcp6_client *client = userdata; |
626 | ||
a1140666 LP |
627 | assert(s); |
628 | assert(client); | |
629 | assert(client->lease); | |
a34b57c0 | 630 | |
c9393e8c | 631 | (void) event_source_disable(client->timeout_t1); |
a34b57c0 PF |
632 | |
633 | log_dhcp6_client(client, "Timeout T1"); | |
634 | ||
3dc34fcc PF |
635 | client_start(client, DHCP6_STATE_RENEW); |
636 | ||
a34b57c0 PF |
637 | return 0; |
638 | } | |
639 | ||
4b558378 | 640 | static int client_timeout_resend_expire(sd_event_source *s, uint64_t usec, void *userdata) { |
d1b0afe3 | 641 | sd_dhcp6_client *client = userdata; |
3dc34fcc PF |
642 | DHCP6_CLIENT_DONT_DESTROY(client); |
643 | enum DHCP6State state; | |
d1b0afe3 PF |
644 | |
645 | assert(s); | |
646 | assert(client); | |
647 | assert(client->event); | |
648 | ||
3dc34fcc PF |
649 | state = client->state; |
650 | ||
10c9ce61 | 651 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE); |
d1b0afe3 | 652 | |
3dc34fcc PF |
653 | /* RFC 3315, section 18.1.4., says that "...the client may choose to |
654 | use a Solicit message to locate a new DHCP server..." */ | |
655 | if (state == DHCP6_STATE_REBIND) | |
656 | client_start(client, DHCP6_STATE_SOLICITATION); | |
657 | ||
d1b0afe3 PF |
658 | return 0; |
659 | } | |
660 | ||
661 | static usec_t client_timeout_compute_random(usec_t val) { | |
662 | return val - val / 10 + | |
663 | (random_u32() % (2 * USEC_PER_SEC)) * val / 10 / USEC_PER_SEC; | |
664 | } | |
665 | ||
4b558378 | 666 | static int client_timeout_resend(sd_event_source *s, uint64_t usec, void *userdata) { |
d1b0afe3 PF |
667 | int r = 0; |
668 | sd_dhcp6_client *client = userdata; | |
4b4923e6 | 669 | usec_t time_now, init_retransmit_time = 0, max_retransmit_time = 0; |
5e913450 | 670 | usec_t max_retransmit_duration = 0; |
513a6fa8 | 671 | uint8_t max_retransmit_count = 0; |
d1b0afe3 | 672 | char time_string[FORMAT_TIMESPAN_MAX]; |
3dc34fcc | 673 | uint32_t expire = 0; |
d1b0afe3 PF |
674 | |
675 | assert(s); | |
676 | assert(client); | |
677 | assert(client->event); | |
678 | ||
c9393e8c | 679 | (void) event_source_disable(client->timeout_resend); |
d1b0afe3 PF |
680 | |
681 | switch (client->state) { | |
bbfa43ca PF |
682 | case DHCP6_STATE_INFORMATION_REQUEST: |
683 | init_retransmit_time = DHCP6_INF_TIMEOUT; | |
684 | max_retransmit_time = DHCP6_INF_MAX_RT; | |
685 | ||
686 | break; | |
687 | ||
d1b0afe3 | 688 | case DHCP6_STATE_SOLICITATION: |
7246333c PF |
689 | |
690 | if (client->retransmit_count && client->lease) { | |
691 | client_start(client, DHCP6_STATE_REQUEST); | |
692 | return 0; | |
693 | } | |
694 | ||
d1b0afe3 PF |
695 | init_retransmit_time = DHCP6_SOL_TIMEOUT; |
696 | max_retransmit_time = DHCP6_SOL_MAX_RT; | |
d1b0afe3 PF |
697 | |
698 | break; | |
699 | ||
7246333c PF |
700 | case DHCP6_STATE_REQUEST: |
701 | init_retransmit_time = DHCP6_REQ_TIMEOUT; | |
702 | max_retransmit_time = DHCP6_REQ_MAX_RT; | |
703 | max_retransmit_count = DHCP6_REQ_MAX_RC; | |
7246333c PF |
704 | |
705 | break; | |
706 | ||
3dc34fcc PF |
707 | case DHCP6_STATE_RENEW: |
708 | init_retransmit_time = DHCP6_REN_TIMEOUT; | |
709 | max_retransmit_time = DHCP6_REN_MAX_RT; | |
3dc34fcc PF |
710 | |
711 | /* RFC 3315, section 18.1.3. says max retransmit duration will | |
712 | be the remaining time until T2. Instead of setting MRD, | |
713 | wait for T2 to trigger with the same end result */ | |
3dc34fcc PF |
714 | |
715 | break; | |
716 | ||
717 | case DHCP6_STATE_REBIND: | |
718 | init_retransmit_time = DHCP6_REB_TIMEOUT; | |
719 | max_retransmit_time = DHCP6_REB_MAX_RT; | |
3dc34fcc | 720 | |
c9393e8c | 721 | if (event_source_is_enabled(client->timeout_resend_expire) <= 0) { |
3dc34fcc PF |
722 | r = dhcp6_lease_ia_rebind_expire(&client->lease->ia, |
723 | &expire); | |
724 | if (r < 0) { | |
725 | client_stop(client, r); | |
726 | return 0; | |
727 | } | |
728 | max_retransmit_duration = expire * USEC_PER_SEC; | |
729 | } | |
730 | ||
731 | break; | |
732 | ||
d1b0afe3 | 733 | case DHCP6_STATE_STOPPED: |
a34b57c0 | 734 | case DHCP6_STATE_BOUND: |
d1b0afe3 PF |
735 | return 0; |
736 | } | |
737 | ||
738 | if (max_retransmit_count && | |
739 | client->retransmit_count >= max_retransmit_count) { | |
10c9ce61 | 740 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RETRANS_MAX); |
d1b0afe3 PF |
741 | return 0; |
742 | } | |
743 | ||
fa94c34b | 744 | r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now); |
d1b0afe3 PF |
745 | if (r < 0) |
746 | goto error; | |
747 | ||
346e13a2 PF |
748 | r = client_send_message(client, time_now); |
749 | if (r >= 0) | |
750 | client->retransmit_count++; | |
751 | ||
d1b0afe3 PF |
752 | if (!client->retransmit_time) { |
753 | client->retransmit_time = | |
754 | client_timeout_compute_random(init_retransmit_time); | |
a9aff361 PF |
755 | |
756 | if (client->state == DHCP6_STATE_SOLICITATION) | |
757 | client->retransmit_time += init_retransmit_time / 10; | |
758 | ||
d1b0afe3 PF |
759 | } else { |
760 | if (max_retransmit_time && | |
761 | client->retransmit_time > max_retransmit_time / 2) | |
762 | client->retransmit_time = client_timeout_compute_random(max_retransmit_time); | |
763 | else | |
764 | client->retransmit_time += client_timeout_compute_random(client->retransmit_time); | |
765 | } | |
766 | ||
767 | log_dhcp6_client(client, "Next retransmission in %s", | |
ed19c567 | 768 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, client->retransmit_time, USEC_PER_SEC)); |
d1b0afe3 | 769 | |
c9393e8c YW |
770 | r = event_reset_time(client->event, &client->timeout_resend, |
771 | clock_boottime_or_monotonic(), | |
772 | time_now + client->retransmit_time, 10 * USEC_PER_MSEC, | |
773 | client_timeout_resend, client, | |
774 | client->event_priority, "dhcp6-resend-timer", true); | |
d1b0afe3 PF |
775 | if (r < 0) |
776 | goto error; | |
777 | ||
c9393e8c | 778 | if (max_retransmit_duration && event_source_is_enabled(client->timeout_resend_expire) <= 0) { |
d1b0afe3 PF |
779 | |
780 | log_dhcp6_client(client, "Max retransmission duration %"PRIu64" secs", | |
781 | max_retransmit_duration / USEC_PER_SEC); | |
782 | ||
c9393e8c YW |
783 | r = event_reset_time(client->event, &client->timeout_resend_expire, |
784 | clock_boottime_or_monotonic(), | |
785 | time_now + max_retransmit_duration, USEC_PER_SEC, | |
786 | client_timeout_resend_expire, client, | |
787 | client->event_priority, "dhcp6-resend-expire-timer", true); | |
9021bb9f TG |
788 | if (r < 0) |
789 | goto error; | |
d1b0afe3 PF |
790 | } |
791 | ||
792 | error: | |
793 | if (r < 0) | |
794 | client_stop(client, r); | |
795 | ||
796 | return 0; | |
797 | } | |
798 | ||
f12abb48 | 799 | static int client_ensure_iaid(sd_dhcp6_client *client) { |
cfb5b380 | 800 | int r; |
6d13616b | 801 | uint32_t iaid; |
f12abb48 PF |
802 | |
803 | assert(client); | |
804 | ||
8217ed5e | 805 | if (client->iaid_set) |
f12abb48 PF |
806 | return 0; |
807 | ||
6d13616b | 808 | r = dhcp_identifier_set_iaid(client->ifindex, client->mac_addr, client->mac_addr_len, true, &iaid); |
cfb5b380 TG |
809 | if (r < 0) |
810 | return r; | |
f12abb48 | 811 | |
69b43997 PF |
812 | client->ia_na.ia_na.id = iaid; |
813 | client->ia_pd.ia_pd.id = iaid; | |
8217ed5e | 814 | client->iaid_set = true; |
69b43997 | 815 | |
f12abb48 PF |
816 | return 0; |
817 | } | |
818 | ||
4b558378 ZJS |
819 | static int client_parse_message( |
820 | sd_dhcp6_client *client, | |
821 | DHCP6Message *message, | |
822 | size_t len, | |
823 | sd_dhcp6_lease *lease) { | |
da07cf35 YW |
824 | |
825 | uint32_t lt_t1 = ~0, lt_t2 = ~0; | |
826 | bool clientid = false; | |
3bc424a3 | 827 | size_t pos = 0; |
fcb51238 | 828 | usec_t irt = IRT_DEFAULT; |
631bbe71 | 829 | int r; |
631bbe71 | 830 | |
a1140666 LP |
831 | assert(client); |
832 | assert(message); | |
833 | assert(len >= sizeof(DHCP6Message)); | |
834 | assert(lease); | |
835 | ||
44481a8b ZJS |
836 | len -= sizeof(DHCP6Message); |
837 | ||
3bc424a3 | 838 | while (pos < len) { |
da07cf35 | 839 | DHCP6Option *option = (DHCP6Option *) &message->options[pos]; |
c6b4f32a | 840 | uint16_t optcode, optlen; |
3bc424a3 | 841 | be32_t iaid_lease; |
da07cf35 YW |
842 | uint8_t *optval; |
843 | int status; | |
3bc424a3 | 844 | |
da07cf35 | 845 | if (len < pos + offsetof(DHCP6Option, data)) |
3bc424a3 PF |
846 | return -ENOBUFS; |
847 | ||
848 | optcode = be16toh(option->code); | |
849 | optlen = be16toh(option->len); | |
850 | optval = option->data; | |
851 | ||
da07cf35 YW |
852 | if (len < pos + offsetof(DHCP6Option, data) + optlen) |
853 | return -ENOBUFS; | |
854 | ||
631bbe71 | 855 | switch (optcode) { |
2c1ab8ca | 856 | case SD_DHCP6_OPTION_CLIENTID: |
631bbe71 PF |
857 | if (clientid) { |
858 | log_dhcp6_client(client, "%s contains multiple clientids", | |
859 | dhcp6_message_type_to_string(message->type)); | |
860 | return -EINVAL; | |
861 | } | |
862 | ||
66eac120 | 863 | if (optlen != client->duid_len || |
631bbe71 PF |
864 | memcmp(&client->duid, optval, optlen) != 0) { |
865 | log_dhcp6_client(client, "%s DUID does not match", | |
866 | dhcp6_message_type_to_string(message->type)); | |
867 | ||
868 | return -EINVAL; | |
869 | } | |
870 | clientid = true; | |
871 | ||
872 | break; | |
873 | ||
2c1ab8ca | 874 | case SD_DHCP6_OPTION_SERVERID: |
99f1d3fc ZJS |
875 | r = dhcp6_lease_get_serverid(lease, NULL, NULL); |
876 | if (r >= 0) { | |
631bbe71 PF |
877 | log_dhcp6_client(client, "%s contains multiple serverids", |
878 | dhcp6_message_type_to_string(message->type)); | |
879 | return -EINVAL; | |
880 | } | |
881 | ||
882 | r = dhcp6_lease_set_serverid(lease, optval, optlen); | |
883 | if (r < 0) | |
884 | return r; | |
885 | ||
886 | break; | |
887 | ||
2c1ab8ca | 888 | case SD_DHCP6_OPTION_PREFERENCE: |
631bbe71 PF |
889 | if (optlen != 1) |
890 | return -EINVAL; | |
891 | ||
3bc424a3 | 892 | r = dhcp6_lease_set_preference(lease, optval[0]); |
631bbe71 PF |
893 | if (r < 0) |
894 | return r; | |
895 | ||
896 | break; | |
897 | ||
2c1ab8ca | 898 | case SD_DHCP6_OPTION_STATUS_CODE: |
91c43f39 YW |
899 | status = dhcp6_option_parse_status(option, optlen + sizeof(DHCP6Option)); |
900 | if (status < 0) | |
901 | return status; | |
902 | ||
903 | if (status > 0) { | |
631bbe71 PF |
904 | log_dhcp6_client(client, "%s Status %s", |
905 | dhcp6_message_type_to_string(message->type), | |
906 | dhcp6_message_status_to_string(status)); | |
c6b4f32a | 907 | |
631bbe71 PF |
908 | return -EINVAL; |
909 | } | |
910 | ||
911 | break; | |
912 | ||
2c1ab8ca | 913 | case SD_DHCP6_OPTION_IA_NA: |
bbfa43ca PF |
914 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { |
915 | log_dhcp6_client(client, "Information request ignoring IA NA option"); | |
916 | ||
917 | break; | |
918 | } | |
919 | ||
3bc424a3 | 920 | r = dhcp6_option_parse_ia(option, &lease->ia); |
631bbe71 PF |
921 | if (r < 0 && r != -ENOMSG) |
922 | return r; | |
923 | ||
924 | r = dhcp6_lease_get_iaid(lease, &iaid_lease); | |
925 | if (r < 0) | |
926 | return r; | |
927 | ||
e0026dcb | 928 | if (client->ia_na.ia_na.id != iaid_lease) { |
dce6563f PF |
929 | log_dhcp6_client(client, "%s has wrong IAID for IA NA", |
930 | dhcp6_message_type_to_string(message->type)); | |
931 | return -EINVAL; | |
932 | } | |
933 | ||
b47fb949 PF |
934 | if (lease->ia.addresses) { |
935 | lt_t1 = MIN(lt_t1, be32toh(lease->ia.ia_na.lifetime_t1)); | |
936 | lt_t2 = MIN(lt_t2, be32toh(lease->ia.ia_na.lifetime_t1)); | |
937 | } | |
938 | ||
dce6563f PF |
939 | break; |
940 | ||
941 | case SD_DHCP6_OPTION_IA_PD: | |
942 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { | |
943 | log_dhcp6_client(client, "Information request ignoring IA PD option"); | |
944 | ||
945 | break; | |
946 | } | |
947 | ||
948 | r = dhcp6_option_parse_ia(option, &lease->pd); | |
949 | if (r < 0 && r != -ENOMSG) | |
950 | return r; | |
951 | ||
49228c75 | 952 | r = dhcp6_lease_get_pd_iaid(lease, &iaid_lease); |
dce6563f PF |
953 | if (r < 0) |
954 | return r; | |
955 | ||
956 | if (client->ia_pd.ia_pd.id != iaid_lease) { | |
957 | log_dhcp6_client(client, "%s has wrong IAID for IA PD", | |
631bbe71 PF |
958 | dhcp6_message_type_to_string(message->type)); |
959 | return -EINVAL; | |
960 | } | |
961 | ||
b47fb949 PF |
962 | if (lease->pd.addresses) { |
963 | lt_t1 = MIN(lt_t1, be32toh(lease->pd.ia_pd.lifetime_t1)); | |
964 | lt_t2 = MIN(lt_t2, be32toh(lease->pd.ia_pd.lifetime_t2)); | |
965 | } | |
966 | ||
631bbe71 | 967 | break; |
ed6ee219 | 968 | |
2c1ab8ca | 969 | case SD_DHCP6_OPTION_RAPID_COMMIT: |
ed6ee219 PF |
970 | r = dhcp6_lease_set_rapid_commit(lease); |
971 | if (r < 0) | |
972 | return r; | |
973 | ||
974 | break; | |
7bd8e95d | 975 | |
2c1ab8ca | 976 | case SD_DHCP6_OPTION_DNS_SERVERS: |
7bd8e95d PF |
977 | r = dhcp6_lease_set_dns(lease, optval, optlen); |
978 | if (r < 0) | |
979 | return r; | |
980 | ||
981 | break; | |
5da1b97f | 982 | |
2c1ab8ca | 983 | case SD_DHCP6_OPTION_DOMAIN_LIST: |
5da1b97f PF |
984 | r = dhcp6_lease_set_domains(lease, optval, optlen); |
985 | if (r < 0) | |
986 | return r; | |
987 | ||
988 | break; | |
989 | ||
2c1ab8ca | 990 | case SD_DHCP6_OPTION_NTP_SERVER: |
6599680e PF |
991 | r = dhcp6_lease_set_ntp(lease, optval, optlen); |
992 | if (r < 0) | |
993 | return r; | |
994 | ||
995 | break; | |
41e4615d | 996 | |
2c1ab8ca | 997 | case SD_DHCP6_OPTION_SNTP_SERVERS: |
41e4615d PF |
998 | r = dhcp6_lease_set_sntp(lease, optval, optlen); |
999 | if (r < 0) | |
1000 | return r; | |
1001 | ||
1002 | break; | |
fcb51238 YW |
1003 | |
1004 | case SD_DHCP6_OPTION_INFORMATION_REFRESH_TIME: | |
6ffe71d0 YW |
1005 | if (optlen != 4) |
1006 | return -EINVAL; | |
1007 | ||
fcb51238 YW |
1008 | irt = be32toh(*(be32_t *) optval) * USEC_PER_SEC; |
1009 | break; | |
631bbe71 | 1010 | } |
6599680e | 1011 | |
23976cb9 | 1012 | pos += offsetof(DHCP6Option, data) + optlen; |
631bbe71 PF |
1013 | } |
1014 | ||
1eeddba4 | 1015 | if (!clientid) { |
631bbe71 PF |
1016 | log_dhcp6_client(client, "%s has incomplete options", |
1017 | dhcp6_message_type_to_string(message->type)); | |
1018 | return -EINVAL; | |
1019 | } | |
1020 | ||
bbfa43ca | 1021 | if (client->state != DHCP6_STATE_INFORMATION_REQUEST) { |
99f1d3fc ZJS |
1022 | r = dhcp6_lease_get_serverid(lease, NULL, NULL); |
1023 | if (r < 0) { | |
bbfa43ca PF |
1024 | log_dhcp6_client(client, "%s has no server id", |
1025 | dhcp6_message_type_to_string(message->type)); | |
99f1d3fc ZJS |
1026 | return -EINVAL; |
1027 | } | |
b47fb949 | 1028 | |
99f1d3fc ZJS |
1029 | } else { |
1030 | if (lease->ia.addresses) { | |
1031 | lease->ia.ia_na.lifetime_t1 = htobe32(lt_t1); | |
1032 | lease->ia.ia_na.lifetime_t2 = htobe32(lt_t2); | |
1033 | } | |
b47fb949 | 1034 | |
99f1d3fc ZJS |
1035 | if (lease->pd.addresses) { |
1036 | lease->pd.ia_pd.lifetime_t1 = htobe32(lt_t1); | |
1037 | lease->pd.ia_pd.lifetime_t2 = htobe32(lt_t2); | |
1038 | } | |
bbfa43ca | 1039 | } |
631bbe71 | 1040 | |
fcb51238 YW |
1041 | client->information_refresh_time_usec = MAX(irt, IRT_MINIMUM); |
1042 | ||
21a9905c | 1043 | return 0; |
631bbe71 PF |
1044 | } |
1045 | ||
0ae0e5cd | 1046 | static int client_receive_reply(sd_dhcp6_client *client, DHCP6Message *reply, size_t len) { |
4afd3348 | 1047 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
ed6ee219 | 1048 | bool rapid_commit; |
a1140666 LP |
1049 | int r; |
1050 | ||
1051 | assert(client); | |
1052 | assert(reply); | |
a34b57c0 PF |
1053 | |
1054 | if (reply->type != DHCP6_REPLY) | |
ed6ee219 | 1055 | return 0; |
a34b57c0 PF |
1056 | |
1057 | r = dhcp6_lease_new(&lease); | |
1058 | if (r < 0) | |
1059 | return -ENOMEM; | |
1060 | ||
1061 | r = client_parse_message(client, reply, len, lease); | |
1062 | if (r < 0) | |
1063 | return r; | |
1064 | ||
ed6ee219 PF |
1065 | if (client->state == DHCP6_STATE_SOLICITATION) { |
1066 | r = dhcp6_lease_get_rapid_commit(lease, &rapid_commit); | |
1067 | if (r < 0) | |
1068 | return r; | |
1069 | ||
1070 | if (!rapid_commit) | |
1071 | return 0; | |
1072 | } | |
1073 | ||
431a4bc8 YW |
1074 | sd_dhcp6_lease_unref(client->lease); |
1075 | client->lease = TAKE_PTR(lease); | |
a34b57c0 PF |
1076 | |
1077 | return DHCP6_STATE_BOUND; | |
1078 | } | |
1079 | ||
0ae0e5cd | 1080 | static int client_receive_advertise(sd_dhcp6_client *client, DHCP6Message *advertise, size_t len) { |
4afd3348 | 1081 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
631bbe71 | 1082 | uint8_t pref_advertise = 0, pref_lease = 0; |
a1140666 | 1083 | int r; |
631bbe71 PF |
1084 | |
1085 | if (advertise->type != DHCP6_ADVERTISE) | |
ed6ee219 | 1086 | return 0; |
631bbe71 PF |
1087 | |
1088 | r = dhcp6_lease_new(&lease); | |
1089 | if (r < 0) | |
1090 | return r; | |
1091 | ||
1092 | r = client_parse_message(client, advertise, len, lease); | |
1093 | if (r < 0) | |
1094 | return r; | |
1095 | ||
1096 | r = dhcp6_lease_get_preference(lease, &pref_advertise); | |
1097 | if (r < 0) | |
1098 | return r; | |
1099 | ||
1100 | r = dhcp6_lease_get_preference(client->lease, &pref_lease); | |
bbfa43ca PF |
1101 | |
1102 | if (r < 0 || pref_advertise > pref_lease) { | |
431a4bc8 YW |
1103 | sd_dhcp6_lease_unref(client->lease); |
1104 | client->lease = TAKE_PTR(lease); | |
631bbe71 PF |
1105 | r = 0; |
1106 | } | |
1107 | ||
7246333c PF |
1108 | if (pref_advertise == 255 || client->retransmit_count > 1) |
1109 | r = DHCP6_STATE_REQUEST; | |
1110 | ||
631bbe71 PF |
1111 | return r; |
1112 | } | |
1113 | ||
004845d1 LP |
1114 | static int client_receive_message( |
1115 | sd_event_source *s, | |
1116 | int fd, uint32_t | |
1117 | revents, | |
1118 | void *userdata) { | |
1119 | ||
631bbe71 | 1120 | sd_dhcp6_client *client = userdata; |
3f0c075f | 1121 | DHCP6_CLIENT_DONT_DESTROY(client); |
0d43d2fc | 1122 | _cleanup_free_ DHCP6Message *message = NULL; |
4edc2c9b LP |
1123 | ssize_t buflen, len; |
1124 | int r = 0; | |
631bbe71 PF |
1125 | |
1126 | assert(s); | |
1127 | assert(client); | |
1128 | assert(client->event); | |
1129 | ||
4edc2c9b | 1130 | buflen = next_datagram_size_fd(fd); |
22a3fd2d BG |
1131 | if (buflen == -ENETDOWN) { |
1132 | /* the link is down. Don't return an error or the I/O event | |
1133 | source will be disconnected and we won't be able to receive | |
1134 | packets again when the link comes back. */ | |
1135 | return 0; | |
1136 | } | |
4edc2c9b LP |
1137 | if (buflen < 0) |
1138 | return buflen; | |
631bbe71 | 1139 | |
0d43d2fc | 1140 | message = malloc(buflen); |
631bbe71 PF |
1141 | if (!message) |
1142 | return -ENOMEM; | |
1143 | ||
cf447cb6 | 1144 | len = recv(fd, message, buflen, 0); |
0d43d2fc | 1145 | if (len < 0) { |
22a3fd2d BG |
1146 | /* see comment above for why we shouldn't error out on ENETDOWN. */ |
1147 | if (IN_SET(errno, EAGAIN, EINTR, ENETDOWN)) | |
0d43d2fc TG |
1148 | return 0; |
1149 | ||
bd9a7221 | 1150 | return log_dhcp6_client_errno(client, errno, "Could not receive message from UDP socket: %m"); |
0d43d2fc | 1151 | |
004845d1 LP |
1152 | } |
1153 | if ((size_t) len < sizeof(DHCP6Message)) { | |
1154 | log_dhcp6_client(client, "Too small to be DHCP6 message: ignoring"); | |
631bbe71 | 1155 | return 0; |
004845d1 | 1156 | } |
631bbe71 PF |
1157 | |
1158 | switch(message->type) { | |
1159 | case DHCP6_SOLICIT: | |
1160 | case DHCP6_REQUEST: | |
1161 | case DHCP6_CONFIRM: | |
1162 | case DHCP6_RENEW: | |
1163 | case DHCP6_REBIND: | |
1164 | case DHCP6_RELEASE: | |
1165 | case DHCP6_DECLINE: | |
1166 | case DHCP6_INFORMATION_REQUEST: | |
1167 | case DHCP6_RELAY_FORW: | |
1168 | case DHCP6_RELAY_REPL: | |
1169 | return 0; | |
1170 | ||
1171 | case DHCP6_ADVERTISE: | |
1172 | case DHCP6_REPLY: | |
1173 | case DHCP6_RECONFIGURE: | |
1174 | break; | |
1175 | ||
1176 | default: | |
bd9a7221 | 1177 | log_dhcp6_client(client, "Unknown message type %d", message->type); |
631bbe71 PF |
1178 | return 0; |
1179 | } | |
1180 | ||
1181 | if (client->transaction_id != (message->transaction_id & | |
1182 | htobe32(0x00ffffff))) | |
1183 | return 0; | |
1184 | ||
1185 | switch (client->state) { | |
bbfa43ca PF |
1186 | case DHCP6_STATE_INFORMATION_REQUEST: |
1187 | r = client_receive_reply(client, message, len); | |
1188 | if (r < 0) | |
1189 | return 0; | |
1190 | ||
10c9ce61 | 1191 | client_notify(client, SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST); |
bbfa43ca PF |
1192 | |
1193 | client_start(client, DHCP6_STATE_STOPPED); | |
1194 | ||
1195 | break; | |
1196 | ||
631bbe71 PF |
1197 | case DHCP6_STATE_SOLICITATION: |
1198 | r = client_receive_advertise(client, message, len); | |
1199 | ||
ed6ee219 | 1200 | if (r == DHCP6_STATE_REQUEST) { |
7246333c PF |
1201 | client_start(client, r); |
1202 | ||
ed6ee219 PF |
1203 | break; |
1204 | } | |
631bbe71 | 1205 | |
4831981d | 1206 | _fallthrough_; /* for Soliciation Rapid Commit option check */ |
7246333c | 1207 | case DHCP6_STATE_REQUEST: |
3dc34fcc PF |
1208 | case DHCP6_STATE_RENEW: |
1209 | case DHCP6_STATE_REBIND: | |
1210 | ||
a34b57c0 PF |
1211 | r = client_receive_reply(client, message, len); |
1212 | if (r < 0) | |
1213 | return 0; | |
1214 | ||
1215 | if (r == DHCP6_STATE_BOUND) { | |
1216 | ||
1217 | r = client_start(client, DHCP6_STATE_BOUND); | |
1218 | if (r < 0) { | |
1219 | client_stop(client, r); | |
1220 | return 0; | |
1221 | } | |
1222 | ||
10c9ce61 | 1223 | client_notify(client, SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE); |
a34b57c0 PF |
1224 | } |
1225 | ||
1226 | break; | |
1227 | ||
1228 | case DHCP6_STATE_BOUND: | |
1229 | ||
1230 | break; | |
1231 | ||
631bbe71 | 1232 | case DHCP6_STATE_STOPPED: |
631bbe71 PF |
1233 | return 0; |
1234 | } | |
1235 | ||
712fdfd6 YW |
1236 | log_dhcp6_client(client, "Recv %s", |
1237 | dhcp6_message_type_to_string(message->type)); | |
631bbe71 | 1238 | |
a9aff361 PF |
1239 | return 0; |
1240 | } | |
1241 | ||
134ebaa4 PF |
1242 | static int client_get_lifetime(sd_dhcp6_client *client, uint32_t *lifetime_t1, |
1243 | uint32_t *lifetime_t2) { | |
1244 | assert_return(client, -EINVAL); | |
1245 | assert_return(client->lease, -EINVAL); | |
1246 | ||
1247 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA) && client->lease->ia.addresses) { | |
1248 | *lifetime_t1 = be32toh(client->lease->ia.ia_na.lifetime_t1); | |
1249 | *lifetime_t2 = be32toh(client->lease->ia.ia_na.lifetime_t2); | |
1250 | ||
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD) && client->lease->pd.addresses) { | |
1255 | *lifetime_t1 = be32toh(client->lease->pd.ia_pd.lifetime_t1); | |
1256 | *lifetime_t2 = be32toh(client->lease->pd.ia_pd.lifetime_t2); | |
1257 | ||
1258 | return 0; | |
1259 | } | |
1260 | ||
1261 | return -ENOMSG; | |
1262 | } | |
1263 | ||
0ae0e5cd | 1264 | static int client_start(sd_dhcp6_client *client, enum DHCP6State state) { |
f12abb48 | 1265 | int r; |
a34b57c0 PF |
1266 | usec_t timeout, time_now; |
1267 | char time_string[FORMAT_TIMESPAN_MAX]; | |
134ebaa4 | 1268 | uint32_t lifetime_t1, lifetime_t2; |
f12abb48 PF |
1269 | |
1270 | assert_return(client, -EINVAL); | |
1271 | assert_return(client->event, -EINVAL); | |
2f8e7633 | 1272 | assert_return(client->ifindex > 0, -EINVAL); |
c3e2adea | 1273 | assert_return(client->state != state, -EINVAL); |
f12abb48 | 1274 | |
c9393e8c YW |
1275 | (void) event_source_disable(client->timeout_resend_expire); |
1276 | (void) event_source_disable(client->timeout_resend); | |
c3e2adea PF |
1277 | client->retransmit_time = 0; |
1278 | client->retransmit_count = 0; | |
f12abb48 | 1279 | |
38a03f06 LP |
1280 | r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now); |
1281 | if (r < 0) | |
1282 | return r; | |
346e13a2 | 1283 | |
7ac6c26a PF |
1284 | if (!client->receive_message) { |
1285 | r = sd_event_add_io(client->event, &client->receive_message, | |
1286 | client->fd, EPOLLIN, client_receive_message, | |
1287 | client); | |
1288 | if (r < 0) | |
1289 | goto error; | |
1290 | ||
1291 | r = sd_event_source_set_priority(client->receive_message, | |
1292 | client->event_priority); | |
1293 | if (r < 0) | |
1294 | goto error; | |
1295 | ||
1296 | r = sd_event_source_set_description(client->receive_message, | |
1297 | "dhcp6-receive-message"); | |
1298 | if (r < 0) | |
1299 | goto error; | |
1300 | } | |
1301 | ||
c3e2adea PF |
1302 | switch (state) { |
1303 | case DHCP6_STATE_STOPPED: | |
bbfa43ca PF |
1304 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { |
1305 | client->state = DHCP6_STATE_STOPPED; | |
a9aff361 | 1306 | |
bbfa43ca PF |
1307 | return 0; |
1308 | } | |
9021bb9f | 1309 | |
4831981d | 1310 | _fallthrough_; |
bbfa43ca | 1311 | case DHCP6_STATE_SOLICITATION: |
c3e2adea PF |
1312 | client->state = DHCP6_STATE_SOLICITATION; |
1313 | ||
7246333c PF |
1314 | break; |
1315 | ||
bbfa43ca | 1316 | case DHCP6_STATE_INFORMATION_REQUEST: |
7246333c | 1317 | case DHCP6_STATE_REQUEST: |
3dc34fcc PF |
1318 | case DHCP6_STATE_RENEW: |
1319 | case DHCP6_STATE_REBIND: | |
a34b57c0 | 1320 | |
7246333c PF |
1321 | client->state = state; |
1322 | ||
c3e2adea | 1323 | break; |
a34b57c0 PF |
1324 | |
1325 | case DHCP6_STATE_BOUND: | |
1326 | ||
134ebaa4 PF |
1327 | r = client_get_lifetime(client, &lifetime_t1, &lifetime_t2); |
1328 | if (r < 0) | |
1329 | goto error; | |
a34b57c0 | 1330 | |
134ebaa4 | 1331 | if (lifetime_t1 == 0xffffffff || lifetime_t2 == 0xffffffff) { |
bd9a7221 | 1332 | log_dhcp6_client(client, "Infinite T1 0x%08x or T2 0x%08x", |
134ebaa4 | 1333 | lifetime_t1, lifetime_t2); |
a34b57c0 PF |
1334 | |
1335 | return 0; | |
1336 | } | |
1337 | ||
134ebaa4 | 1338 | timeout = client_timeout_compute_random(lifetime_t1 * USEC_PER_SEC); |
a34b57c0 PF |
1339 | |
1340 | log_dhcp6_client(client, "T1 expires in %s", | |
ed19c567 | 1341 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC)); |
a34b57c0 | 1342 | |
c9393e8c YW |
1343 | r = event_reset_time(client->event, &client->timeout_t1, |
1344 | clock_boottime_or_monotonic(), | |
1345 | time_now + timeout, 10 * USEC_PER_SEC, | |
1346 | client_timeout_t1, client, | |
1347 | client->event_priority, "dhcp6-t1-timeout", true); | |
9021bb9f | 1348 | if (r < 0) |
7ac6c26a | 1349 | goto error; |
9021bb9f | 1350 | |
134ebaa4 | 1351 | timeout = client_timeout_compute_random(lifetime_t2 * USEC_PER_SEC); |
a34b57c0 PF |
1352 | |
1353 | log_dhcp6_client(client, "T2 expires in %s", | |
ed19c567 | 1354 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC)); |
a34b57c0 | 1355 | |
c9393e8c YW |
1356 | r = event_reset_time(client->event, &client->timeout_t2, |
1357 | clock_boottime_or_monotonic(), | |
1358 | time_now + timeout, 10 * USEC_PER_SEC, | |
1359 | client_timeout_t2, client, | |
1360 | client->event_priority, "dhcp6-t2-timeout", true); | |
9021bb9f | 1361 | if (r < 0) |
7ac6c26a | 1362 | goto error; |
9021bb9f | 1363 | |
3dc34fcc PF |
1364 | client->state = state; |
1365 | ||
a34b57c0 | 1366 | return 0; |
c3e2adea | 1367 | } |
a9aff361 | 1368 | |
c3e2adea | 1369 | client->transaction_id = random_u32() & htobe32(0x00ffffff); |
346e13a2 | 1370 | client->transaction_start = time_now; |
d1b0afe3 | 1371 | |
c9393e8c YW |
1372 | r = event_reset_time(client->event, &client->timeout_resend, |
1373 | clock_boottime_or_monotonic(), | |
1374 | 0, 0, | |
1375 | client_timeout_resend, client, | |
1376 | client->event_priority, "dhcp6-resend-timeout", true); | |
9021bb9f | 1377 | if (r < 0) |
7ac6c26a | 1378 | goto error; |
9021bb9f | 1379 | |
f12abb48 | 1380 | return 0; |
7ac6c26a PF |
1381 | |
1382 | error: | |
1383 | client_reset(client); | |
1384 | return r; | |
f12abb48 PF |
1385 | } |
1386 | ||
0ae0e5cd | 1387 | int sd_dhcp6_client_stop(sd_dhcp6_client *client) { |
f667c150 TG |
1388 | assert_return(client, -EINVAL); |
1389 | ||
10c9ce61 | 1390 | client_stop(client, SD_DHCP6_CLIENT_EVENT_STOP); |
139b011a | 1391 | |
7ac6c26a PF |
1392 | client->fd = safe_close(client->fd); |
1393 | ||
139b011a PF |
1394 | return 0; |
1395 | } | |
1396 | ||
f667c150 TG |
1397 | int sd_dhcp6_client_is_running(sd_dhcp6_client *client) { |
1398 | assert_return(client, -EINVAL); | |
1399 | ||
1400 | return client->state != DHCP6_STATE_STOPPED; | |
1401 | } | |
1402 | ||
0ae0e5cd | 1403 | int sd_dhcp6_client_start(sd_dhcp6_client *client) { |
bbfa43ca | 1404 | enum DHCP6State state = DHCP6_STATE_SOLICITATION; |
2f8e7633 | 1405 | int r = 0; |
139b011a PF |
1406 | |
1407 | assert_return(client, -EINVAL); | |
1408 | assert_return(client->event, -EINVAL); | |
2f8e7633 | 1409 | assert_return(client->ifindex > 0, -EINVAL); |
c601ebf7 | 1410 | assert_return(in_addr_is_link_local(AF_INET6, (const union in_addr_union *) &client->local_address) > 0, -EINVAL); |
139b011a | 1411 | |
d7c9c21f | 1412 | if (!IN_SET(client->state, DHCP6_STATE_STOPPED)) |
63348d13 | 1413 | return -EBUSY; |
d7c9c21f | 1414 | |
f311a62b PF |
1415 | if (!client->information_request && !client->request) |
1416 | return -EINVAL; | |
1417 | ||
c806ffb9 | 1418 | r = client_reset(client); |
f12abb48 PF |
1419 | if (r < 0) |
1420 | return r; | |
1421 | ||
bbfa43ca PF |
1422 | r = client_ensure_iaid(client); |
1423 | if (r < 0) | |
1424 | return r; | |
1425 | ||
cc22955c TH |
1426 | r = client_ensure_duid(client); |
1427 | if (r < 0) | |
1428 | return r; | |
1429 | ||
10a0f27b PF |
1430 | if (client->fd < 0) { |
1431 | r = dhcp6_network_bind_udp_socket(client->ifindex, &client->local_address); | |
1432 | if (r < 0) { | |
1433 | _cleanup_free_ char *p = NULL; | |
1434 | ||
1435 | (void) in_addr_to_string(AF_INET6, (const union in_addr_union*) &client->local_address, &p); | |
1436 | return log_dhcp6_client_errno(client, r, | |
1437 | "Failed to bind to UDP socket at address %s: %m", strna(p)); | |
1438 | } | |
bd9a7221 | 1439 | |
10a0f27b | 1440 | client->fd = r; |
bd9a7221 | 1441 | } |
bbfa43ca | 1442 | |
fcb51238 YW |
1443 | if (client->information_request) { |
1444 | usec_t t = now(CLOCK_MONOTONIC); | |
1445 | ||
1446 | if (t < usec_add(client->information_request_time_usec, client->information_refresh_time_usec)) | |
1447 | return 0; | |
1448 | ||
1449 | client->information_request_time_usec = t; | |
bbfa43ca | 1450 | state = DHCP6_STATE_INFORMATION_REQUEST; |
fcb51238 | 1451 | } |
bbfa43ca PF |
1452 | |
1453 | log_dhcp6_client(client, "Started in %s mode", | |
483d099e ZJS |
1454 | client->information_request? "Information request": |
1455 | "Managed"); | |
bbfa43ca PF |
1456 | |
1457 | return client_start(client, state); | |
139b011a PF |
1458 | } |
1459 | ||
32d20645 | 1460 | int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event, int64_t priority) { |
139b011a PF |
1461 | int r; |
1462 | ||
1463 | assert_return(client, -EINVAL); | |
1464 | assert_return(!client->event, -EBUSY); | |
1465 | ||
1466 | if (event) | |
1467 | client->event = sd_event_ref(event); | |
1468 | else { | |
1469 | r = sd_event_default(&client->event); | |
1470 | if (r < 0) | |
1471 | return 0; | |
1472 | } | |
1473 | ||
1474 | client->event_priority = priority; | |
1475 | ||
1476 | return 0; | |
1477 | } | |
1478 | ||
1479 | int sd_dhcp6_client_detach_event(sd_dhcp6_client *client) { | |
1480 | assert_return(client, -EINVAL); | |
1481 | ||
1482 | client->event = sd_event_unref(client->event); | |
1483 | ||
1484 | return 0; | |
1485 | } | |
1486 | ||
1487 | sd_event *sd_dhcp6_client_get_event(sd_dhcp6_client *client) { | |
a1140666 | 1488 | assert_return(client, NULL); |
139b011a PF |
1489 | |
1490 | return client->event; | |
1491 | } | |
1492 | ||
8301aa0b YW |
1493 | static sd_dhcp6_client *dhcp6_client_free(sd_dhcp6_client *client) { |
1494 | assert(client); | |
139b011a | 1495 | |
c9393e8c YW |
1496 | client->timeout_resend = sd_event_source_unref(client->timeout_resend); |
1497 | client->timeout_resend_expire = sd_event_source_unref(client->timeout_resend_expire); | |
1498 | client->timeout_t1 = sd_event_source_unref(client->timeout_t1); | |
1499 | client->timeout_t2 = sd_event_source_unref(client->timeout_t2); | |
1500 | ||
3733eec3 LP |
1501 | client_reset(client); |
1502 | ||
10a0f27b PF |
1503 | client->fd = safe_close(client->fd); |
1504 | ||
3733eec3 | 1505 | sd_dhcp6_client_detach_event(client); |
3733eec3 LP |
1506 | |
1507 | free(client->req_opts); | |
8006aa32 | 1508 | free(client->fqdn); |
6b430fdb | 1509 | return mfree(client); |
139b011a PF |
1510 | } |
1511 | ||
8301aa0b YW |
1512 | DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp6_client, sd_dhcp6_client, dhcp6_client_free); |
1513 | ||
0ae0e5cd | 1514 | int sd_dhcp6_client_new(sd_dhcp6_client **ret) { |
4afd3348 | 1515 | _cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL; |
8b8ecac8 | 1516 | _cleanup_free_ be16_t *req_opts = NULL; |
da6fe470 | 1517 | size_t t; |
139b011a PF |
1518 | |
1519 | assert_return(ret, -EINVAL); | |
1520 | ||
8b8ecac8 YW |
1521 | req_opts = new(be16_t, ELEMENTSOF(default_req_opts)); |
1522 | if (!req_opts) | |
139b011a PF |
1523 | return -ENOMEM; |
1524 | ||
8b8ecac8 YW |
1525 | for (t = 0; t < ELEMENTSOF(default_req_opts); t++) |
1526 | req_opts[t] = htobe16(default_req_opts[t]); | |
c806ffb9 | 1527 | |
8b8ecac8 YW |
1528 | client = new(sd_dhcp6_client, 1); |
1529 | if (!client) | |
da6fe470 PF |
1530 | return -ENOMEM; |
1531 | ||
8b8ecac8 YW |
1532 | *client = (sd_dhcp6_client) { |
1533 | .n_ref = 1, | |
1534 | .ia_na.type = SD_DHCP6_OPTION_IA_NA, | |
1535 | .ia_pd.type = SD_DHCP6_OPTION_IA_PD, | |
1536 | .ifindex = -1, | |
1537 | .request = DHCP6_REQUEST_IA_NA, | |
1538 | .fd = -1, | |
1539 | .req_opts_len = ELEMENTSOF(default_req_opts), | |
1540 | .req_opts = TAKE_PTR(req_opts), | |
1541 | }; | |
da6fe470 | 1542 | |
1cc6c93a | 1543 | *ret = TAKE_PTR(client); |
139b011a PF |
1544 | |
1545 | return 0; | |
1546 | } |