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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
139b011a | 2 | /*** |
810adae9 | 3 | Copyright © 2014-2015 Intel Corporation. All rights reserved. |
139b011a PF |
4 | ***/ |
5 | ||
6 | #include <errno.h> | |
631bbe71 | 7 | #include <sys/ioctl.h> |
8f815e8b | 8 | #include <linux/if_arp.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" |
793178b9 | 14 | #include "device-util.h" |
07630cea | 15 | #include "dhcp-identifier.h" |
f12abb48 | 16 | #include "dhcp6-internal.h" |
631bbe71 | 17 | #include "dhcp6-lease-internal.h" |
8006aa32 | 18 | #include "dns-domain.h" |
c9393e8c | 19 | #include "event-util.h" |
3ffd4af2 | 20 | #include "fd-util.h" |
6b7d5b6e | 21 | #include "hexdecoct.h" |
8006aa32 | 22 | #include "hostname-util.h" |
c601ebf7 | 23 | #include "in-addr-util.h" |
653ddc1d | 24 | #include "io-util.h" |
07630cea | 25 | #include "random-util.h" |
4edc2c9b | 26 | #include "socket-util.h" |
0e0c4dae | 27 | #include "sort-util.h" |
7e19cc54 | 28 | #include "strv.h" |
de8d6e55 | 29 | #include "web-util.h" |
139b011a | 30 | |
3f0c075f | 31 | #define DHCP6_CLIENT_DONT_DESTROY(client) \ |
4afd3348 | 32 | _cleanup_(sd_dhcp6_client_unrefp) _unused_ sd_dhcp6_client *_dont_destroy_##client = sd_dhcp6_client_ref(client) |
3f0c075f | 33 | |
e5d69be2 | 34 | static int client_start_transaction(sd_dhcp6_client *client, DHCP6State state); |
c3e2adea | 35 | |
4b558378 ZJS |
36 | int sd_dhcp6_client_set_callback( |
37 | sd_dhcp6_client *client, | |
38 | sd_dhcp6_client_callback_t cb, | |
39 | void *userdata) { | |
45aa74c7 | 40 | |
139b011a PF |
41 | assert_return(client, -EINVAL); |
42 | ||
45aa74c7 | 43 | client->callback = cb; |
139b011a PF |
44 | client->userdata = userdata; |
45 | ||
46 | return 0; | |
47 | } | |
48 | ||
2f8e7633 | 49 | int sd_dhcp6_client_set_ifindex(sd_dhcp6_client *client, int ifindex) { |
2f8e7633 | 50 | assert_return(client, -EINVAL); |
6f4490bb | 51 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); |
7fa69c0a | 52 | assert_return(ifindex > 0, -EINVAL); |
d7c9c21f | 53 | |
2f8e7633 | 54 | client->ifindex = ifindex; |
139b011a PF |
55 | return 0; |
56 | } | |
57 | ||
61a9fa8f YW |
58 | int sd_dhcp6_client_set_ifname(sd_dhcp6_client *client, const char *ifname) { |
59 | assert_return(client, -EINVAL); | |
60 | assert_return(ifname, -EINVAL); | |
61 | ||
62 | if (!ifname_valid_full(ifname, IFNAME_VALID_ALTERNATIVE)) | |
63 | return -EINVAL; | |
64 | ||
65 | return free_and_strdup(&client->ifname, ifname); | |
66 | } | |
67 | ||
5977b71f YW |
68 | int sd_dhcp6_client_get_ifname(sd_dhcp6_client *client, const char **ret) { |
69 | int r; | |
61a9fa8f | 70 | |
5977b71f YW |
71 | assert_return(client, -EINVAL); |
72 | ||
73 | r = get_ifname(client->ifindex, &client->ifname); | |
74 | if (r < 0) | |
75 | return r; | |
76 | ||
77 | if (ret) | |
78 | *ret = client->ifname; | |
79 | ||
80 | return 0; | |
61a9fa8f YW |
81 | } |
82 | ||
4b558378 ZJS |
83 | int sd_dhcp6_client_set_local_address( |
84 | sd_dhcp6_client *client, | |
85 | const struct in6_addr *local_address) { | |
86 | ||
c601ebf7 | 87 | assert_return(client, -EINVAL); |
6f4490bb | 88 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); |
c601ebf7 | 89 | assert_return(local_address, -EINVAL); |
94876904 | 90 | assert_return(in6_addr_is_link_local(local_address) > 0, -EINVAL); |
c601ebf7 TG |
91 | |
92 | client->local_address = *local_address; | |
93 | ||
94 | return 0; | |
95 | } | |
96 | ||
0ae0e5cd LP |
97 | int sd_dhcp6_client_set_mac( |
98 | sd_dhcp6_client *client, | |
1978efb9 YW |
99 | const uint8_t *addr, |
100 | size_t addr_len, | |
0ae0e5cd LP |
101 | uint16_t arp_type) { |
102 | ||
139b011a | 103 | assert_return(client, -EINVAL); |
76253e73 | 104 | assert_return(addr, -EINVAL); |
1978efb9 | 105 | assert_return(addr_len <= sizeof(client->hw_addr.bytes), -EINVAL); |
6f4490bb YW |
106 | |
107 | /* Unlike the other setters, it is OK to set a new MAC address while the client is running, | |
108 | * as the MAC address is used only when setting DUID or IAID. */ | |
d7c9c21f | 109 | |
76253e73 DW |
110 | if (arp_type == ARPHRD_ETHER) |
111 | assert_return(addr_len == ETH_ALEN, -EINVAL); | |
112 | else if (arp_type == ARPHRD_INFINIBAND) | |
113 | assert_return(addr_len == INFINIBAND_ALEN, -EINVAL); | |
1d370b2c JT |
114 | else { |
115 | client->arp_type = ARPHRD_NONE; | |
1978efb9 | 116 | client->hw_addr.length = 0; |
1d370b2c JT |
117 | return 0; |
118 | } | |
76253e73 | 119 | |
76253e73 | 120 | client->arp_type = arp_type; |
e0ead130 | 121 | hw_addr_set(&client->hw_addr, addr, addr_len); |
139b011a PF |
122 | |
123 | return 0; | |
124 | } | |
125 | ||
2805536b SS |
126 | int sd_dhcp6_client_set_prefix_delegation_hint( |
127 | sd_dhcp6_client *client, | |
128 | uint8_t prefixlen, | |
877bfc78 YW |
129 | const struct in6_addr *pd_prefix) { |
130 | ||
131 | _cleanup_free_ DHCP6Address *prefix = NULL; | |
2805536b SS |
132 | |
133 | assert_return(client, -EINVAL); | |
6f4490bb | 134 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); |
2805536b | 135 | |
877bfc78 YW |
136 | if (!pd_prefix) { |
137 | /* clear previous assignments. */ | |
138 | dhcp6_ia_clear_addresses(&client->ia_pd); | |
139 | return 0; | |
140 | } | |
141 | ||
142 | assert_return(prefixlen > 0 && prefixlen <= 128, -EINVAL); | |
2805536b | 143 | |
877bfc78 YW |
144 | prefix = new(DHCP6Address, 1); |
145 | if (!prefix) | |
146 | return -ENOMEM; | |
147 | ||
148 | *prefix = (DHCP6Address) { | |
149 | .iapdprefix.address = *pd_prefix, | |
150 | .iapdprefix.prefixlen = prefixlen, | |
151 | }; | |
152 | ||
153 | LIST_PREPEND(addresses, client->ia_pd.addresses, TAKE_PTR(prefix)); | |
154 | return 1; | |
2805536b SS |
155 | } |
156 | ||
99ccb8ff SS |
157 | int sd_dhcp6_client_add_vendor_option(sd_dhcp6_client *client, sd_dhcp6_option *v) { |
158 | int r; | |
159 | ||
160 | assert_return(client, -EINVAL); | |
6f4490bb | 161 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); |
99ccb8ff | 162 | |
9e4dee4c YW |
163 | if (!v) { |
164 | /* Clear the previous assignments. */ | |
165 | ordered_set_clear(client->vendor_options); | |
166 | return 0; | |
167 | } | |
168 | ||
169 | r = ordered_set_ensure_put(&client->vendor_options, &dhcp6_option_hash_ops, v); | |
99ccb8ff SS |
170 | if (r < 0) |
171 | return r; | |
172 | ||
173 | sd_dhcp6_option_ref(v); | |
174 | ||
175 | return 1; | |
176 | } | |
177 | ||
0ae0e5cd | 178 | static int client_ensure_duid(sd_dhcp6_client *client) { |
6f4490bb YW |
179 | assert(client); |
180 | ||
cc22955c TH |
181 | if (client->duid_len != 0) |
182 | return 0; | |
0ae0e5cd | 183 | |
ac680f76 | 184 | return dhcp_identifier_set_duid_en(client->test_mode, &client->duid, &client->duid_len); |
cc22955c TH |
185 | } |
186 | ||
d7df2fd3 ZJS |
187 | /** |
188 | * Sets DUID. If duid is non-null, the DUID is set to duid_type + duid | |
189 | * without further modification. Otherwise, if duid_type is supported, DUID | |
190 | * is set based on that type. Otherwise, an error is returned. | |
191 | */ | |
7e90a499 | 192 | static int dhcp6_client_set_duid_internal( |
4b558378 | 193 | sd_dhcp6_client *client, |
5e1618fa | 194 | DUIDType duid_type, |
f7a92d1a | 195 | const void *duid, |
7e90a499 YW |
196 | size_t duid_len, |
197 | usec_t llt_time) { | |
413708d1 | 198 | int r; |
27eba50e | 199 | |
66eac120 | 200 | assert_return(client, -EINVAL); |
6f4490bb YW |
201 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); |
202 | assert_return(duid_len == 0 || duid, -EINVAL); | |
c83321e6 | 203 | |
1d6cc5d0 | 204 | if (duid) { |
ab4a88bc TH |
205 | r = dhcp_validate_duid_len(duid_type, duid_len, true); |
206 | if (r < 0) { | |
207 | r = dhcp_validate_duid_len(duid_type, duid_len, false); | |
208 | if (r < 0) | |
a339859f | 209 | return log_dhcp6_client_errno(client, r, "Failed to validate length of DUID: %m"); |
01bcea49 | 210 | |
c0f86d66 | 211 | log_dhcp6_client(client, "Using DUID of type %i of incorrect length, proceeding.", duid_type); |
ab4a88bc | 212 | } |
d7df2fd3 | 213 | |
413708d1 VK |
214 | client->duid.type = htobe16(duid_type); |
215 | memcpy(&client->duid.raw.data, duid, duid_len); | |
d7df2fd3 | 216 | client->duid_len = sizeof(client->duid.type) + duid_len; |
335f80a6 | 217 | |
5e1618fa | 218 | } else { |
8cad358e YW |
219 | r = dhcp_identifier_set_duid(duid_type, &client->hw_addr, client->arp_type, llt_time, |
220 | client->test_mode, &client->duid, &client->duid_len); | |
5e1618fa YW |
221 | if (r == -EOPNOTSUPP) |
222 | return log_dhcp6_client_errno(client, r, | |
223 | "Failed to set %s. MAC address is not set or " | |
224 | "interface type is not supported.", | |
225 | duid_type_to_string(duid_type)); | |
226 | if (r < 0) | |
227 | return log_dhcp6_client_errno(client, r, "Failed to set %s: %m", | |
228 | duid_type_to_string(duid_type)); | |
229 | } | |
fe4b2156 | 230 | |
413708d1 VK |
231 | return 0; |
232 | } | |
233 | ||
7e90a499 YW |
234 | int sd_dhcp6_client_set_duid( |
235 | sd_dhcp6_client *client, | |
236 | uint16_t duid_type, | |
237 | const void *duid, | |
238 | size_t duid_len) { | |
239 | return dhcp6_client_set_duid_internal(client, duid_type, duid, duid_len, 0); | |
240 | } | |
241 | ||
242 | int sd_dhcp6_client_set_duid_llt( | |
243 | sd_dhcp6_client *client, | |
244 | usec_t llt_time) { | |
245 | return dhcp6_client_set_duid_internal(client, DUID_TYPE_LLT, NULL, 0, llt_time); | |
246 | } | |
247 | ||
6b7d5b6e SS |
248 | int sd_dhcp6_client_duid_as_string( |
249 | sd_dhcp6_client *client, | |
250 | char **duid) { | |
251 | _cleanup_free_ char *p = NULL, *s = NULL, *t = NULL; | |
252 | const char *v; | |
253 | int r; | |
254 | ||
255 | assert_return(client, -EINVAL); | |
256 | assert_return(client->duid_len > 0, -ENODATA); | |
361eb412 | 257 | assert_return(duid, -EINVAL); |
6b7d5b6e | 258 | |
f9971018 | 259 | v = duid_type_to_string(be16toh(client->duid.type)); |
6b7d5b6e SS |
260 | if (v) { |
261 | s = strdup(v); | |
262 | if (!s) | |
263 | return -ENOMEM; | |
264 | } else { | |
265 | r = asprintf(&s, "%0x", client->duid.type); | |
266 | if (r < 0) | |
267 | return -ENOMEM; | |
268 | } | |
269 | ||
270 | t = hexmem(&client->duid.raw.data, client->duid_len); | |
271 | if (!t) | |
272 | return -ENOMEM; | |
273 | ||
274 | p = strjoin(s, ":", t); | |
275 | if (!p) | |
276 | return -ENOMEM; | |
277 | ||
278 | *duid = TAKE_PTR(p); | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
413708d1 VK |
283 | int sd_dhcp6_client_set_iaid(sd_dhcp6_client *client, uint32_t iaid) { |
284 | assert_return(client, -EINVAL); | |
6f4490bb | 285 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); |
413708d1 | 286 | |
4b0f2717 YW |
287 | client->ia_na.header.id = htobe32(iaid); |
288 | client->ia_pd.header.id = htobe32(iaid); | |
8217ed5e | 289 | client->iaid_set = true; |
66eac120 DW |
290 | |
291 | return 0; | |
292 | } | |
293 | ||
0eca25ba YW |
294 | static int client_ensure_iaid(sd_dhcp6_client *client) { |
295 | int r; | |
296 | uint32_t iaid; | |
297 | ||
8d71f2b3 YW |
298 | assert(client); |
299 | ||
0eca25ba YW |
300 | if (client->iaid_set) |
301 | return 0; | |
302 | ||
14805b14 | 303 | r = dhcp_identifier_set_iaid(client->dev, &client->hw_addr, |
0eca25ba | 304 | /* legacy_unstable_byteorder = */ true, |
0eca25ba YW |
305 | &iaid); |
306 | if (r < 0) | |
307 | return r; | |
308 | ||
309 | client->ia_na.header.id = iaid; | |
310 | client->ia_pd.header.id = iaid; | |
311 | client->iaid_set = true; | |
312 | ||
313 | return 0; | |
8d71f2b3 YW |
314 | } |
315 | ||
d69d4038 SS |
316 | int sd_dhcp6_client_get_iaid(sd_dhcp6_client *client, uint32_t *iaid) { |
317 | assert_return(client, -EINVAL); | |
318 | assert_return(iaid, -EINVAL); | |
319 | ||
320 | if (!client->iaid_set) | |
321 | return -ENODATA; | |
322 | ||
4b0f2717 | 323 | *iaid = be32toh(client->ia_na.header.id); |
d69d4038 SS |
324 | |
325 | return 0; | |
326 | } | |
327 | ||
0eca25ba YW |
328 | void dhcp6_client_set_test_mode(sd_dhcp6_client *client, bool test_mode) { |
329 | assert(client); | |
330 | ||
331 | client->test_mode = test_mode; | |
332 | } | |
333 | ||
8006aa32 SA |
334 | int sd_dhcp6_client_set_fqdn( |
335 | sd_dhcp6_client *client, | |
336 | const char *fqdn) { | |
337 | ||
338 | assert_return(client, -EINVAL); | |
6f4490bb | 339 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); |
8006aa32 SA |
340 | |
341 | /* Make sure FQDN qualifies as DNS and as Linux hostname */ | |
342 | if (fqdn && | |
52ef5dd7 | 343 | !(hostname_is_valid(fqdn, 0) && dns_name_is_valid(fqdn) > 0)) |
8006aa32 SA |
344 | return -EINVAL; |
345 | ||
346 | return free_and_strdup(&client->fqdn, fqdn); | |
347 | } | |
348 | ||
04c01369 | 349 | int sd_dhcp6_client_set_information_request(sd_dhcp6_client *client, int enabled) { |
bbfa43ca | 350 | assert_return(client, -EINVAL); |
6f4490bb | 351 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); |
d7c9c21f | 352 | |
bbfa43ca PF |
353 | client->information_request = enabled; |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
04c01369 | 358 | int sd_dhcp6_client_get_information_request(sd_dhcp6_client *client, int *enabled) { |
bbfa43ca PF |
359 | assert_return(client, -EINVAL); |
360 | assert_return(enabled, -EINVAL); | |
361 | ||
362 | *enabled = client->information_request; | |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
0e0c4dae YW |
367 | static int be16_compare_func(const be16_t *a, const be16_t *b) { |
368 | return CMP(be16toh(*a), be16toh(*b)); | |
369 | } | |
370 | ||
0ae0e5cd | 371 | int sd_dhcp6_client_set_request_option(sd_dhcp6_client *client, uint16_t option) { |
0e0c4dae | 372 | be16_t opt; |
da6fe470 PF |
373 | |
374 | assert_return(client, -EINVAL); | |
6f4490bb | 375 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); |
da6fe470 | 376 | |
fea8c180 | 377 | if (!dhcp6_option_can_request(option)) |
da6fe470 | 378 | return -EINVAL; |
da6fe470 | 379 | |
0e0c4dae YW |
380 | opt = htobe16(option); |
381 | if (typesafe_bsearch(&opt, client->req_opts, client->n_req_opts, be16_compare_func)) | |
382 | return -EEXIST; | |
da6fe470 | 383 | |
2f53b311 | 384 | if (!GREEDY_REALLOC(client->req_opts, client->n_req_opts + 1)) |
da6fe470 PF |
385 | return -ENOMEM; |
386 | ||
0e0c4dae | 387 | client->req_opts[client->n_req_opts++] = opt; |
da6fe470 | 388 | |
0e0c4dae YW |
389 | /* Sort immediately to make the above binary search will work for the next time. */ |
390 | typesafe_qsort(client->req_opts, client->n_req_opts, be16_compare_func); | |
da6fe470 PF |
391 | return 0; |
392 | } | |
393 | ||
feb7d7a2 | 394 | int sd_dhcp6_client_set_request_mud_url(sd_dhcp6_client *client, const char *mudurl) { |
de8d6e55 | 395 | assert_return(client, -EINVAL); |
6f4490bb | 396 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); |
de8d6e55 | 397 | assert_return(mudurl, -EINVAL); |
2d3adfa6 | 398 | assert_return(strlen(mudurl) <= UINT8_MAX, -EINVAL); |
de8d6e55 SS |
399 | assert_return(http_url_is_valid(mudurl), -EINVAL); |
400 | ||
401 | return free_and_strdup(&client->mudurl, mudurl); | |
402 | } | |
403 | ||
5a99444e | 404 | int sd_dhcp6_client_set_request_user_class(sd_dhcp6_client *client, char * const *user_class) { |
5a99444e | 405 | char **s; |
33923925 SS |
406 | |
407 | assert_return(client, -EINVAL); | |
6f4490bb | 408 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); |
5a99444e | 409 | assert_return(!strv_isempty(user_class), -EINVAL); |
73c8ced7 | 410 | |
5a99444e YW |
411 | STRV_FOREACH(p, user_class) { |
412 | size_t len = strlen(*p); | |
33923925 | 413 | |
5a99444e YW |
414 | if (len > UINT16_MAX || len == 0) |
415 | return -EINVAL; | |
416 | } | |
33923925 | 417 | |
2d3adfa6 | 418 | s = strv_copy(user_class); |
33923925 SS |
419 | if (!s) |
420 | return -ENOMEM; | |
421 | ||
5a99444e | 422 | return strv_free_and_replace(client->user_class, s); |
33923925 SS |
423 | } |
424 | ||
019951ec | 425 | int sd_dhcp6_client_set_request_vendor_class(sd_dhcp6_client *client, char * const *vendor_class) { |
019951ec | 426 | char **s; |
73c8ced7 SS |
427 | |
428 | assert_return(client, -EINVAL); | |
6f4490bb | 429 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); |
019951ec | 430 | assert_return(!strv_isempty(vendor_class), -EINVAL); |
73c8ced7 | 431 | |
019951ec YW |
432 | STRV_FOREACH(p, vendor_class) { |
433 | size_t len = strlen(*p); | |
434 | ||
435 | if (len > UINT16_MAX || len == 0) | |
436 | return -EINVAL; | |
437 | } | |
73c8ced7 SS |
438 | |
439 | s = strv_copy(vendor_class); | |
440 | if (!s) | |
441 | return -ENOMEM; | |
442 | ||
019951ec | 443 | return strv_free_and_replace(client->vendor_class, s); |
73c8ced7 SS |
444 | } |
445 | ||
d8c51121 PF |
446 | int sd_dhcp6_client_get_prefix_delegation(sd_dhcp6_client *client, int *delegation) { |
447 | assert_return(client, -EINVAL); | |
448 | assert_return(delegation, -EINVAL); | |
449 | ||
b261b5f4 | 450 | *delegation = FLAGS_SET(client->request_ia, DHCP6_REQUEST_IA_PD); |
d8c51121 PF |
451 | |
452 | return 0; | |
453 | } | |
454 | ||
455 | int sd_dhcp6_client_set_prefix_delegation(sd_dhcp6_client *client, int delegation) { | |
7c3de8f8 | 456 | assert_return(client, -EINVAL); |
6f4490bb | 457 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); |
7c3de8f8 | 458 | |
b261b5f4 | 459 | SET_FLAG(client->request_ia, DHCP6_REQUEST_IA_PD, delegation); |
f311a62b PF |
460 | |
461 | return 0; | |
462 | } | |
463 | ||
464 | int sd_dhcp6_client_get_address_request(sd_dhcp6_client *client, int *request) { | |
465 | assert_return(client, -EINVAL); | |
466 | assert_return(request, -EINVAL); | |
467 | ||
b261b5f4 | 468 | *request = FLAGS_SET(client->request_ia, DHCP6_REQUEST_IA_NA); |
f311a62b PF |
469 | |
470 | return 0; | |
471 | } | |
472 | ||
473 | int sd_dhcp6_client_set_address_request(sd_dhcp6_client *client, int request) { | |
474 | assert_return(client, -EINVAL); | |
6f4490bb | 475 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); |
f311a62b | 476 | |
b261b5f4 | 477 | SET_FLAG(client->request_ia, DHCP6_REQUEST_IA_NA, request); |
7c3de8f8 PF |
478 | |
479 | return 0; | |
480 | } | |
481 | ||
6f3fc861 YW |
482 | int dhcp6_client_set_transaction_id(sd_dhcp6_client *client, uint32_t transaction_id) { |
483 | assert(client); | |
484 | assert(client->test_mode); | |
485 | ||
486 | /* This is for tests or fuzzers. */ | |
d89a400e | 487 | |
6f3fc861 | 488 | client->transaction_id = transaction_id & htobe32(0x00ffffff); |
d89a400e EV |
489 | |
490 | return 0; | |
491 | } | |
492 | ||
4397967f YW |
493 | int sd_dhcp6_client_set_rapid_commit(sd_dhcp6_client *client, int enable) { |
494 | assert_return(client, -EINVAL); | |
495 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); | |
496 | ||
497 | client->rapid_commit = enable; | |
498 | return 0; | |
499 | } | |
500 | ||
ea3b3a75 PF |
501 | int sd_dhcp6_client_get_lease(sd_dhcp6_client *client, sd_dhcp6_lease **ret) { |
502 | assert_return(client, -EINVAL); | |
ea3b3a75 PF |
503 | |
504 | if (!client->lease) | |
505 | return -ENOMSG; | |
506 | ||
3098562c TG |
507 | if (ret) |
508 | *ret = client->lease; | |
ea3b3a75 PF |
509 | |
510 | return 0; | |
511 | } | |
512 | ||
e7d5fe17 AD |
513 | int sd_dhcp6_client_add_option(sd_dhcp6_client *client, sd_dhcp6_option *v) { |
514 | int r; | |
515 | ||
516 | assert_return(client, -EINVAL); | |
517 | assert_return(v, -EINVAL); | |
518 | ||
02288f3e | 519 | r = ordered_hashmap_ensure_put(&client->extra_options, &dhcp6_option_hash_ops, UINT_TO_PTR(v->option), v); |
e7d5fe17 AD |
520 | if (r < 0) |
521 | return r; | |
522 | ||
523 | sd_dhcp6_option_ref(v); | |
524 | return 0; | |
525 | } | |
526 | ||
65b85f23 YW |
527 | static void client_set_state(sd_dhcp6_client *client, DHCP6State state) { |
528 | assert(client); | |
529 | ||
530 | if (client->state == state) | |
531 | return; | |
532 | ||
533 | log_dhcp6_client(client, "State changed: %s -> %s", | |
534 | dhcp6_state_to_string(client->state), dhcp6_state_to_string(state)); | |
535 | ||
536 | client->state = state; | |
537 | } | |
538 | ||
3f0c075f | 539 | static void client_notify(sd_dhcp6_client *client, int event) { |
45aa74c7 LP |
540 | assert(client); |
541 | ||
542 | if (client->callback) | |
543 | client->callback(client, event, client->userdata); | |
139b011a PF |
544 | } |
545 | ||
1929c1fc | 546 | static void client_cleanup(sd_dhcp6_client *client) { |
af2b4841 | 547 | assert(client); |
4e3e6679 | 548 | |
af2b4841 | 549 | client->lease = sd_dhcp6_lease_unref(client->lease); |
d1b0afe3 | 550 | |
dd73db78 YW |
551 | /* Reset IRT here. Otherwise, we cannot restart the client in the information requesting mode, |
552 | * even though the lease is freed below. */ | |
553 | client->information_request_time_usec = 0; | |
554 | client->information_refresh_time_usec = 0; | |
555 | ||
8ef959cd | 556 | (void) event_source_disable(client->receive_message); |
c9393e8c | 557 | (void) event_source_disable(client->timeout_resend); |
3bb18e70 | 558 | (void) event_source_disable(client->timeout_expire); |
c9393e8c YW |
559 | (void) event_source_disable(client->timeout_t1); |
560 | (void) event_source_disable(client->timeout_t2); | |
213e759a | 561 | |
65b85f23 | 562 | client_set_state(client, DHCP6_STATE_STOPPED); |
139b011a PF |
563 | } |
564 | ||
1929c1fc YW |
565 | static void client_stop(sd_dhcp6_client *client, int error) { |
566 | DHCP6_CLIENT_DONT_DESTROY(client); | |
567 | ||
568 | assert(client); | |
569 | ||
570 | client_notify(client, error); | |
571 | ||
572 | client_cleanup(client); | |
573 | } | |
574 | ||
5e4d135c YW |
575 | static int client_append_common_options_in_managed_mode( |
576 | sd_dhcp6_client *client, | |
9d2d346a YW |
577 | uint8_t **buf, |
578 | size_t *offset, | |
5e4d135c | 579 | const DHCP6IA *ia_na, |
877bfc78 | 580 | const DHCP6IA *ia_pd) { |
5e4d135c YW |
581 | |
582 | int r; | |
583 | ||
584 | assert(client); | |
585 | assert(IN_SET(client->state, | |
586 | DHCP6_STATE_SOLICITATION, | |
587 | DHCP6_STATE_REQUEST, | |
588 | DHCP6_STATE_RENEW, | |
589 | DHCP6_STATE_REBIND)); | |
9d2d346a YW |
590 | assert(buf); |
591 | assert(*buf); | |
592 | assert(offset); | |
5e4d135c YW |
593 | |
594 | if (FLAGS_SET(client->request_ia, DHCP6_REQUEST_IA_NA) && ia_na) { | |
9d2d346a | 595 | r = dhcp6_option_append_ia(buf, offset, ia_na); |
5e4d135c YW |
596 | if (r < 0) |
597 | return r; | |
598 | } | |
599 | ||
600 | if (FLAGS_SET(client->request_ia, DHCP6_REQUEST_IA_PD) && ia_pd) { | |
9d2d346a | 601 | r = dhcp6_option_append_ia(buf, offset, ia_pd); |
5e4d135c YW |
602 | if (r < 0) |
603 | return r; | |
604 | } | |
605 | ||
9d2d346a | 606 | r = dhcp6_option_append_fqdn(buf, offset, client->fqdn); |
4ec5b5c7 YW |
607 | if (r < 0) |
608 | return r; | |
5e4d135c | 609 | |
9d2d346a | 610 | r = dhcp6_option_append_user_class(buf, offset, client->user_class); |
4ec5b5c7 YW |
611 | if (r < 0) |
612 | return r; | |
5e4d135c | 613 | |
9d2d346a | 614 | r = dhcp6_option_append_vendor_class(buf, offset, client->vendor_class); |
4ec5b5c7 YW |
615 | if (r < 0) |
616 | return r; | |
5e4d135c | 617 | |
9d2d346a | 618 | r = dhcp6_option_append_vendor_option(buf, offset, client->vendor_options); |
4ec5b5c7 YW |
619 | if (r < 0) |
620 | return r; | |
5e4d135c YW |
621 | |
622 | return 0; | |
623 | } | |
624 | ||
625 | static DHCP6MessageType client_message_type_from_state(sd_dhcp6_client *client) { | |
626 | assert(client); | |
627 | ||
628 | switch (client->state) { | |
629 | case DHCP6_STATE_INFORMATION_REQUEST: | |
630 | return DHCP6_MESSAGE_INFORMATION_REQUEST; | |
631 | case DHCP6_STATE_SOLICITATION: | |
632 | return DHCP6_MESSAGE_SOLICIT; | |
633 | case DHCP6_STATE_REQUEST: | |
634 | return DHCP6_MESSAGE_REQUEST; | |
635 | case DHCP6_STATE_RENEW: | |
636 | return DHCP6_MESSAGE_RENEW; | |
637 | case DHCP6_STATE_REBIND: | |
638 | return DHCP6_MESSAGE_REBIND; | |
639 | default: | |
6f4490bb | 640 | assert_not_reached(); |
5e4d135c YW |
641 | } |
642 | } | |
643 | ||
9d2d346a | 644 | static int client_append_oro(sd_dhcp6_client *client, uint8_t **buf, size_t *offset) { |
04542238 | 645 | _cleanup_free_ be16_t *p = NULL; |
822883b3 YW |
646 | be16_t *req_opts; |
647 | size_t n; | |
648 | ||
649 | assert(client); | |
9d2d346a YW |
650 | assert(buf); |
651 | assert(*buf); | |
652 | assert(offset); | |
822883b3 YW |
653 | |
654 | switch (client->state) { | |
655 | case DHCP6_STATE_INFORMATION_REQUEST: | |
656 | n = client->n_req_opts; | |
04542238 YW |
657 | p = new(be16_t, n + 2); |
658 | if (!p) | |
822883b3 YW |
659 | return -ENOMEM; |
660 | ||
04542238 YW |
661 | memcpy_safe(p, client->req_opts, n * sizeof(be16_t)); |
662 | p[n++] = htobe16(SD_DHCP6_OPTION_INFORMATION_REFRESH_TIME); /* RFC 8415 section 21.23 */ | |
663 | p[n++] = htobe16(SD_DHCP6_OPTION_INF_MAX_RT); /* RFC 8415 section 21.25 */ | |
822883b3 | 664 | |
04542238 YW |
665 | typesafe_qsort(p, n, be16_compare_func); |
666 | req_opts = p; | |
822883b3 YW |
667 | break; |
668 | ||
669 | case DHCP6_STATE_SOLICITATION: | |
670 | n = client->n_req_opts; | |
04542238 YW |
671 | p = new(be16_t, n + 1); |
672 | if (!p) | |
822883b3 YW |
673 | return -ENOMEM; |
674 | ||
04542238 YW |
675 | memcpy_safe(p, client->req_opts, n * sizeof(be16_t)); |
676 | p[n++] = htobe16(SD_DHCP6_OPTION_SOL_MAX_RT); /* RFC 8415 section 21.24 */ | |
822883b3 | 677 | |
04542238 YW |
678 | typesafe_qsort(p, n, be16_compare_func); |
679 | req_opts = p; | |
822883b3 YW |
680 | break; |
681 | ||
682 | default: | |
683 | n = client->n_req_opts; | |
684 | req_opts = client->req_opts; | |
685 | } | |
686 | ||
4c275f36 YW |
687 | if (n == 0) |
688 | return 0; | |
689 | ||
9d2d346a | 690 | return dhcp6_option_append(buf, offset, SD_DHCP6_OPTION_ORO, n * sizeof(be16_t), req_opts); |
822883b3 YW |
691 | } |
692 | ||
7b53d3ea | 693 | int dhcp6_client_send_message(sd_dhcp6_client *client) { |
9d2d346a | 694 | _cleanup_free_ uint8_t *buf = NULL; |
a9aff361 PF |
695 | struct in6_addr all_servers = |
696 | IN6ADDR_ALL_DHCP6_RELAY_AGENTS_AND_SERVERS_INIT; | |
e7d5fe17 | 697 | struct sd_dhcp6_option *j; |
ec7baf99 | 698 | usec_t elapsed_usec, time_now; |
346e13a2 | 699 | be16_t elapsed_time; |
9d2d346a YW |
700 | DHCP6Message *message; |
701 | size_t offset; | |
5e4d135c | 702 | int r; |
a9aff361 | 703 | |
a1140666 | 704 | assert(client); |
ec7baf99 YW |
705 | assert(client->event); |
706 | ||
ba4e0427 | 707 | r = sd_event_now(client->event, CLOCK_BOOTTIME, &time_now); |
ec7baf99 YW |
708 | if (r < 0) |
709 | return r; | |
a1140666 | 710 | |
9d2d346a | 711 | if (!GREEDY_REALLOC0(buf, offsetof(DHCP6Message, options))) |
a9aff361 PF |
712 | return -ENOMEM; |
713 | ||
9d2d346a | 714 | message = (DHCP6Message*) buf; |
a9aff361 | 715 | message->transaction_id = client->transaction_id; |
6f4490bb | 716 | message->type = client_message_type_from_state(client); |
9d2d346a | 717 | offset = offsetof(DHCP6Message, options); |
de8d6e55 | 718 | |
5e4d135c YW |
719 | switch (client->state) { |
720 | case DHCP6_STATE_INFORMATION_REQUEST: | |
bbfa43ca PF |
721 | break; |
722 | ||
a9aff361 | 723 | case DHCP6_STATE_SOLICITATION: |
4397967f | 724 | if (client->rapid_commit) { |
9d2d346a | 725 | r = dhcp6_option_append(&buf, &offset, SD_DHCP6_OPTION_RAPID_COMMIT, 0, NULL); |
4397967f YW |
726 | if (r < 0) |
727 | return r; | |
728 | } | |
ed6ee219 | 729 | |
9d2d346a | 730 | r = client_append_common_options_in_managed_mode(client, &buf, &offset, |
877bfc78 | 731 | &client->ia_na, &client->ia_pd); |
5e4d135c YW |
732 | if (r < 0) |
733 | return r; | |
7246333c PF |
734 | break; |
735 | ||
736 | case DHCP6_STATE_REQUEST: | |
3dc34fcc PF |
737 | case DHCP6_STATE_RENEW: |
738 | ||
9d2d346a | 739 | r = dhcp6_option_append(&buf, &offset, SD_DHCP6_OPTION_SERVERID, |
7246333c PF |
740 | client->lease->serverid_len, |
741 | client->lease->serverid); | |
742 | if (r < 0) | |
743 | return r; | |
744 | ||
5e4d135c | 745 | _fallthrough_; |
3dc34fcc | 746 | case DHCP6_STATE_REBIND: |
3dc34fcc | 747 | |
5e4d135c | 748 | assert(client->lease); |
7c3de8f8 | 749 | |
9d2d346a | 750 | r = client_append_common_options_in_managed_mode(client, &buf, &offset, |
877bfc78 | 751 | client->lease->ia_na, client->lease->ia_pd); |
5e4d135c YW |
752 | if (r < 0) |
753 | return r; | |
3dc34fcc PF |
754 | break; |
755 | ||
a9aff361 | 756 | case DHCP6_STATE_STOPPED: |
a34b57c0 | 757 | case DHCP6_STATE_BOUND: |
dd5e9378 YW |
758 | default: |
759 | assert_not_reached(); | |
a9aff361 PF |
760 | } |
761 | ||
5e4d135c | 762 | if (client->mudurl) { |
9d2d346a | 763 | r = dhcp6_option_append(&buf, &offset, SD_DHCP6_OPTION_MUD_URL_V6, |
5e4d135c YW |
764 | strlen(client->mudurl), client->mudurl); |
765 | if (r < 0) | |
766 | return r; | |
767 | } | |
768 | ||
9d2d346a | 769 | r = client_append_oro(client, &buf, &offset); |
da6fe470 PF |
770 | if (r < 0) |
771 | return r; | |
772 | ||
4124b03b | 773 | assert(client->duid_len > 0); |
9d2d346a | 774 | r = dhcp6_option_append(&buf, &offset, SD_DHCP6_OPTION_CLIENTID, |
66eac120 | 775 | client->duid_len, &client->duid); |
7246333c PF |
776 | if (r < 0) |
777 | return r; | |
778 | ||
bbe3f62a | 779 | ORDERED_HASHMAP_FOREACH(j, client->extra_options) { |
9d2d346a | 780 | r = dhcp6_option_append(&buf, &offset, j->option, j->length, j->data); |
bbe3f62a YW |
781 | if (r < 0) |
782 | return r; | |
783 | } | |
784 | ||
aa5a0f95 YW |
785 | /* RFC 8415 Section 21.9. |
786 | * A client MUST include an Elapsed Time option in messages to indicate how long the client has | |
787 | * been trying to complete a DHCP message exchange. */ | |
788 | elapsed_usec = MIN(usec_sub_unsigned(time_now, client->transaction_start) / USEC_PER_MSEC / 10, (usec_t) UINT16_MAX); | |
789 | elapsed_time = htobe16(elapsed_usec); | |
9d2d346a | 790 | r = dhcp6_option_append(&buf, &offset, SD_DHCP6_OPTION_ELAPSED_TIME, sizeof(elapsed_time), &elapsed_time); |
346e13a2 PF |
791 | if (r < 0) |
792 | return r; | |
793 | ||
9d2d346a | 794 | r = dhcp6_network_send_udp_socket(client->fd, &all_servers, buf, offset); |
a9aff361 PF |
795 | if (r < 0) |
796 | return r; | |
797 | ||
798 | log_dhcp6_client(client, "Sent %s", | |
9d2d346a | 799 | dhcp6_message_type_to_string(client_message_type_from_state(client))); |
a9aff361 PF |
800 | return 0; |
801 | } | |
802 | ||
cc518482 YW |
803 | static usec_t client_timeout_compute_random(usec_t val) { |
804 | return usec_sub_unsigned(val, random_u64_range(val / 10)); | |
805 | } | |
806 | ||
c50c9e50 YW |
807 | static int client_timeout_resend(sd_event_source *s, uint64_t usec, void *userdata) { |
808 | sd_dhcp6_client *client = ASSERT_PTR(userdata); | |
809 | usec_t init_retransmit_time, max_retransmit_time; | |
810 | int r; | |
811 | ||
c50c9e50 YW |
812 | assert(client->event); |
813 | ||
814 | switch (client->state) { | |
815 | case DHCP6_STATE_INFORMATION_REQUEST: | |
816 | init_retransmit_time = DHCP6_INF_TIMEOUT; | |
817 | max_retransmit_time = DHCP6_INF_MAX_RT; | |
818 | break; | |
819 | ||
820 | case DHCP6_STATE_SOLICITATION: | |
821 | ||
822 | if (client->retransmit_count > 0 && client->lease) { | |
e5d69be2 | 823 | (void) client_start_transaction(client, DHCP6_STATE_REQUEST); |
c50c9e50 YW |
824 | return 0; |
825 | } | |
826 | ||
827 | init_retransmit_time = DHCP6_SOL_TIMEOUT; | |
828 | max_retransmit_time = DHCP6_SOL_MAX_RT; | |
829 | break; | |
830 | ||
831 | case DHCP6_STATE_REQUEST: | |
832 | ||
833 | if (client->retransmit_count >= DHCP6_REQ_MAX_RC) { | |
834 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RETRANS_MAX); | |
835 | return 0; | |
836 | } | |
837 | ||
838 | init_retransmit_time = DHCP6_REQ_TIMEOUT; | |
839 | max_retransmit_time = DHCP6_REQ_MAX_RT; | |
840 | break; | |
841 | ||
842 | case DHCP6_STATE_RENEW: | |
843 | init_retransmit_time = DHCP6_REN_TIMEOUT; | |
844 | max_retransmit_time = DHCP6_REN_MAX_RT; | |
845 | ||
846 | /* RFC 3315, section 18.1.3. says max retransmit duration will | |
847 | be the remaining time until T2. Instead of setting MRD, | |
848 | wait for T2 to trigger with the same end result */ | |
849 | break; | |
850 | ||
851 | case DHCP6_STATE_REBIND: | |
852 | init_retransmit_time = DHCP6_REB_TIMEOUT; | |
853 | max_retransmit_time = DHCP6_REB_MAX_RT; | |
854 | ||
855 | /* Also, instead of setting MRD, the expire timer is already set in client_enter_bound_state(). */ | |
856 | break; | |
857 | ||
858 | case DHCP6_STATE_STOPPED: | |
859 | case DHCP6_STATE_BOUND: | |
860 | default: | |
861 | assert_not_reached(); | |
862 | } | |
863 | ||
7b53d3ea | 864 | r = dhcp6_client_send_message(client); |
c50c9e50 YW |
865 | if (r >= 0) |
866 | client->retransmit_count++; | |
867 | ||
868 | if (client->retransmit_time == 0) { | |
869 | client->retransmit_time = client_timeout_compute_random(init_retransmit_time); | |
870 | ||
871 | if (client->state == DHCP6_STATE_SOLICITATION) | |
872 | client->retransmit_time += init_retransmit_time / 10; | |
873 | ||
874 | } else if (client->retransmit_time > max_retransmit_time / 2) | |
875 | client->retransmit_time = client_timeout_compute_random(max_retransmit_time); | |
876 | else | |
877 | client->retransmit_time += client_timeout_compute_random(client->retransmit_time); | |
878 | ||
879 | log_dhcp6_client(client, "Next retransmission in %s", | |
880 | FORMAT_TIMESPAN(client->retransmit_time, USEC_PER_SEC)); | |
881 | ||
882 | r = event_reset_time_relative(client->event, &client->timeout_resend, | |
ba4e0427 | 883 | CLOCK_BOOTTIME, |
c50c9e50 YW |
884 | client->retransmit_time, 10 * USEC_PER_MSEC, |
885 | client_timeout_resend, client, | |
886 | client->event_priority, "dhcp6-resend-timer", true); | |
887 | if (r < 0) | |
888 | client_stop(client, r); | |
889 | ||
890 | return 0; | |
891 | } | |
892 | ||
e5d69be2 | 893 | static int client_start_transaction(sd_dhcp6_client *client, DHCP6State state) { |
c50c9e50 YW |
894 | int r; |
895 | ||
6f4490bb YW |
896 | assert(client); |
897 | assert(client->event); | |
c50c9e50 YW |
898 | |
899 | switch (state) { | |
900 | case DHCP6_STATE_INFORMATION_REQUEST: | |
901 | case DHCP6_STATE_SOLICITATION: | |
902 | assert(client->state == DHCP6_STATE_STOPPED); | |
903 | break; | |
904 | case DHCP6_STATE_REQUEST: | |
905 | assert(client->state == DHCP6_STATE_SOLICITATION); | |
906 | break; | |
907 | case DHCP6_STATE_RENEW: | |
908 | assert(client->state == DHCP6_STATE_BOUND); | |
909 | break; | |
910 | case DHCP6_STATE_REBIND: | |
911 | assert(IN_SET(client->state, DHCP6_STATE_BOUND, DHCP6_STATE_RENEW)); | |
912 | break; | |
913 | case DHCP6_STATE_STOPPED: | |
914 | case DHCP6_STATE_BOUND: | |
915 | default: | |
916 | assert_not_reached(); | |
917 | } | |
918 | ||
65b85f23 YW |
919 | client_set_state(client, state); |
920 | ||
c50c9e50 YW |
921 | client->retransmit_time = 0; |
922 | client->retransmit_count = 0; | |
923 | client->transaction_id = random_u32() & htobe32(0x00ffffff); | |
924 | ||
ba4e0427 | 925 | r = sd_event_now(client->event, CLOCK_BOOTTIME, &client->transaction_start); |
c50c9e50 YW |
926 | if (r < 0) |
927 | goto error; | |
928 | ||
929 | r = event_reset_time(client->event, &client->timeout_resend, | |
ba4e0427 | 930 | CLOCK_BOOTTIME, |
c50c9e50 YW |
931 | 0, 0, |
932 | client_timeout_resend, client, | |
933 | client->event_priority, "dhcp6-resend-timeout", true); | |
934 | if (r < 0) | |
935 | goto error; | |
936 | ||
937 | r = sd_event_source_set_enabled(client->receive_message, SD_EVENT_ON); | |
938 | if (r < 0) | |
939 | goto error; | |
940 | ||
941 | return 0; | |
942 | ||
943 | error: | |
944 | client_stop(client, r); | |
945 | return r; | |
946 | } | |
947 | ||
3bb18e70 | 948 | static int client_timeout_expire(sd_event_source *s, uint64_t usec, void *userdata) { |
6f4490bb | 949 | sd_dhcp6_client *client = ASSERT_PTR(userdata); |
3bb18e70 YW |
950 | DHCP6_CLIENT_DONT_DESTROY(client); |
951 | DHCP6State state; | |
952 | ||
3bb18e70 YW |
953 | (void) event_source_disable(client->timeout_expire); |
954 | (void) event_source_disable(client->timeout_t2); | |
955 | (void) event_source_disable(client->timeout_t1); | |
956 | ||
957 | state = client->state; | |
958 | ||
959 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE); | |
960 | ||
961 | /* RFC 3315, section 18.1.4., says that "...the client may choose to | |
962 | use a Solicit message to locate a new DHCP server..." */ | |
963 | if (state == DHCP6_STATE_REBIND) | |
e5d69be2 | 964 | (void) client_start_transaction(client, DHCP6_STATE_SOLICITATION); |
3bb18e70 YW |
965 | |
966 | return 0; | |
967 | } | |
968 | ||
4b558378 | 969 | static int client_timeout_t2(sd_event_source *s, uint64_t usec, void *userdata) { |
6f4490bb | 970 | sd_dhcp6_client *client = ASSERT_PTR(userdata); |
a34b57c0 | 971 | |
c9393e8c | 972 | (void) event_source_disable(client->timeout_t2); |
220a88ca | 973 | (void) event_source_disable(client->timeout_t1); |
a34b57c0 PF |
974 | |
975 | log_dhcp6_client(client, "Timeout T2"); | |
976 | ||
e5d69be2 | 977 | (void) client_start_transaction(client, DHCP6_STATE_REBIND); |
3dc34fcc | 978 | |
a34b57c0 PF |
979 | return 0; |
980 | } | |
981 | ||
4b558378 | 982 | static int client_timeout_t1(sd_event_source *s, uint64_t usec, void *userdata) { |
6f4490bb | 983 | sd_dhcp6_client *client = ASSERT_PTR(userdata); |
a34b57c0 | 984 | |
c9393e8c | 985 | (void) event_source_disable(client->timeout_t1); |
a34b57c0 PF |
986 | |
987 | log_dhcp6_client(client, "Timeout T1"); | |
988 | ||
e5d69be2 | 989 | (void) client_start_transaction(client, DHCP6_STATE_RENEW); |
3dc34fcc | 990 | |
a34b57c0 PF |
991 | return 0; |
992 | } | |
993 | ||
02354ee7 | 994 | static int client_enter_bound_state(sd_dhcp6_client *client) { |
3bb18e70 | 995 | usec_t lifetime_t1, lifetime_t2, lifetime_valid; |
02354ee7 YW |
996 | int r; |
997 | ||
998 | assert(client); | |
999 | assert(client->lease); | |
1000 | assert(IN_SET(client->state, | |
1001 | DHCP6_STATE_SOLICITATION, | |
1002 | DHCP6_STATE_REQUEST, | |
1003 | DHCP6_STATE_RENEW, | |
1004 | DHCP6_STATE_REBIND)); | |
1005 | ||
6f8ff342 | 1006 | (void) event_source_disable(client->receive_message); |
02354ee7 YW |
1007 | (void) event_source_disable(client->timeout_resend); |
1008 | ||
3bb18e70 | 1009 | r = dhcp6_lease_get_lifetime(client->lease, &lifetime_t1, &lifetime_t2, &lifetime_valid); |
02354ee7 YW |
1010 | if (r < 0) |
1011 | goto error; | |
1012 | ||
cdf3d8c5 YW |
1013 | lifetime_t2 = client_timeout_compute_random(lifetime_t2); |
1014 | lifetime_t1 = client_timeout_compute_random(MIN(lifetime_t1, lifetime_t2)); | |
02354ee7 | 1015 | |
cdf3d8c5 YW |
1016 | if (lifetime_t1 == USEC_INFINITY) { |
1017 | log_dhcp6_client(client, "Infinite T1"); | |
1018 | event_source_disable(client->timeout_t1); | |
1019 | } else { | |
1020 | log_dhcp6_client(client, "T1 expires in %s", FORMAT_TIMESPAN(lifetime_t1, USEC_PER_SEC)); | |
1021 | r = event_reset_time_relative(client->event, &client->timeout_t1, | |
ba4e0427 | 1022 | CLOCK_BOOTTIME, |
cdf3d8c5 YW |
1023 | lifetime_t1, 10 * USEC_PER_SEC, |
1024 | client_timeout_t1, client, | |
1025 | client->event_priority, "dhcp6-t1-timeout", true); | |
1026 | if (r < 0) | |
1027 | goto error; | |
1028 | } | |
02354ee7 | 1029 | |
cdf3d8c5 YW |
1030 | if (lifetime_t2 == USEC_INFINITY) { |
1031 | log_dhcp6_client(client, "Infinite T2"); | |
1032 | event_source_disable(client->timeout_t2); | |
1033 | } else { | |
1034 | log_dhcp6_client(client, "T2 expires in %s", FORMAT_TIMESPAN(lifetime_t2, USEC_PER_SEC)); | |
1035 | r = event_reset_time_relative(client->event, &client->timeout_t2, | |
ba4e0427 | 1036 | CLOCK_BOOTTIME, |
cdf3d8c5 YW |
1037 | lifetime_t2, 10 * USEC_PER_SEC, |
1038 | client_timeout_t2, client, | |
1039 | client->event_priority, "dhcp6-t2-timeout", true); | |
1040 | if (r < 0) | |
1041 | goto error; | |
1042 | } | |
02354ee7 | 1043 | |
3bb18e70 YW |
1044 | if (lifetime_valid == USEC_INFINITY) { |
1045 | log_dhcp6_client(client, "Infinite valid lifetime"); | |
1046 | event_source_disable(client->timeout_expire); | |
1047 | } else { | |
1048 | log_dhcp6_client(client, "Valid lifetime expires in %s", FORMAT_TIMESPAN(lifetime_valid, USEC_PER_SEC)); | |
1049 | ||
1050 | r = event_reset_time_relative(client->event, &client->timeout_expire, | |
ba4e0427 | 1051 | CLOCK_BOOTTIME, |
3bb18e70 YW |
1052 | lifetime_valid, USEC_PER_SEC, |
1053 | client_timeout_expire, client, | |
1054 | client->event_priority, "dhcp6-lease-expire", true); | |
1055 | if (r < 0) | |
1056 | goto error; | |
1057 | } | |
1058 | ||
65b85f23 | 1059 | client_set_state(client, DHCP6_STATE_BOUND); |
c41bdb17 | 1060 | client_notify(client, SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE); |
02354ee7 YW |
1061 | return 0; |
1062 | ||
1063 | error: | |
1064 | client_stop(client, r); | |
1065 | return r; | |
1066 | } | |
1067 | ||
07a3b340 YW |
1068 | static int log_invalid_message_type(sd_dhcp6_client *client, const DHCP6Message *message) { |
1069 | const char *type_str; | |
1070 | ||
1071 | assert(client); | |
1072 | assert(message); | |
1073 | ||
1074 | type_str = dhcp6_message_type_to_string(message->type); | |
1075 | if (type_str) | |
1076 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EINVAL), | |
1077 | "Received unexpected %s message, ignoring.", type_str); | |
1078 | else | |
1079 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EINVAL), | |
1080 | "Received unsupported message type %u, ignoring.", message->type); | |
1081 | } | |
1082 | ||
1083 | static int client_process_information( | |
ef4edc15 | 1084 | sd_dhcp6_client *client, |
65ece4c8 | 1085 | DHCP6Message *message, |
ef4edc15 | 1086 | size_t len, |
65ece4c8 | 1087 | const triple_timestamp *timestamp, |
ef4edc15 YW |
1088 | const struct in6_addr *server_address) { |
1089 | ||
4afd3348 | 1090 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
a1140666 LP |
1091 | int r; |
1092 | ||
6f4490bb YW |
1093 | assert(client); |
1094 | assert(message); | |
1095 | ||
65ece4c8 | 1096 | if (message->type != DHCP6_MESSAGE_REPLY) |
07a3b340 | 1097 | return log_invalid_message_type(client, message); |
a34b57c0 | 1098 | |
65ece4c8 | 1099 | r = dhcp6_lease_new_from_message(client, message, len, timestamp, server_address, &lease); |
a34b57c0 | 1100 | if (r < 0) |
07a3b340 | 1101 | return log_dhcp6_client_errno(client, r, "Failed to process received reply message, ignoring: %m"); |
a34b57c0 | 1102 | |
cfcc85bb YW |
1103 | log_dhcp6_client(client, "Processed %s message", dhcp6_message_type_to_string(message->type)); |
1104 | ||
07a3b340 YW |
1105 | sd_dhcp6_lease_unref(client->lease); |
1106 | client->lease = TAKE_PTR(lease); | |
ed6ee219 | 1107 | |
6f8ff342 YW |
1108 | /* Do not call client_stop() here, as it frees the acquired lease. */ |
1109 | (void) event_source_disable(client->receive_message); | |
c2c878d8 | 1110 | (void) event_source_disable(client->timeout_resend); |
65b85f23 | 1111 | client_set_state(client, DHCP6_STATE_STOPPED); |
c2c878d8 | 1112 | |
07a3b340 | 1113 | client_notify(client, SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST); |
c2c878d8 | 1114 | return 0; |
07a3b340 YW |
1115 | } |
1116 | ||
1117 | static int client_process_reply( | |
1118 | sd_dhcp6_client *client, | |
1119 | DHCP6Message *message, | |
1120 | size_t len, | |
1121 | const triple_timestamp *timestamp, | |
1122 | const struct in6_addr *server_address) { | |
1123 | ||
1124 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; | |
1125 | int r; | |
1126 | ||
1127 | assert(client); | |
1128 | assert(message); | |
1129 | ||
1130 | if (message->type != DHCP6_MESSAGE_REPLY) | |
1131 | return log_invalid_message_type(client, message); | |
1132 | ||
1133 | r = dhcp6_lease_new_from_message(client, message, len, timestamp, server_address, &lease); | |
1929c1fc YW |
1134 | if (r == -EADDRNOTAVAIL) { |
1135 | ||
1136 | /* If NoBinding status code is received, we cannot request the address anymore. | |
1137 | * Let's restart transaction from the beginning. */ | |
1138 | ||
1139 | if (client->state == DHCP6_STATE_REQUEST) | |
1140 | /* The lease is not acquired yet, hence it is not necessary to notify the restart. */ | |
1141 | client_cleanup(client); | |
1142 | else | |
1143 | /* We need to notify the previous lease was expired. */ | |
1144 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE); | |
1145 | ||
1146 | return client_start_transaction(client, DHCP6_STATE_SOLICITATION); | |
1147 | } | |
07a3b340 YW |
1148 | if (r < 0) |
1149 | return log_dhcp6_client_errno(client, r, "Failed to process received reply message, ignoring: %m"); | |
1150 | ||
cfcc85bb YW |
1151 | log_dhcp6_client(client, "Processed %s message", dhcp6_message_type_to_string(message->type)); |
1152 | ||
431a4bc8 YW |
1153 | sd_dhcp6_lease_unref(client->lease); |
1154 | client->lease = TAKE_PTR(lease); | |
a34b57c0 | 1155 | |
c41bdb17 | 1156 | return client_enter_bound_state(client); |
a34b57c0 PF |
1157 | } |
1158 | ||
07a3b340 | 1159 | static int client_process_advertise_or_rapid_commit_reply( |
ef4edc15 | 1160 | sd_dhcp6_client *client, |
65ece4c8 | 1161 | DHCP6Message *message, |
ef4edc15 | 1162 | size_t len, |
65ece4c8 | 1163 | const triple_timestamp *timestamp, |
ef4edc15 YW |
1164 | const struct in6_addr *server_address) { |
1165 | ||
4afd3348 | 1166 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
07a3b340 | 1167 | uint8_t pref_advertise, pref_lease = 0; |
a1140666 | 1168 | int r; |
631bbe71 | 1169 | |
653ddc1d | 1170 | assert(client); |
65ece4c8 | 1171 | assert(message); |
653ddc1d | 1172 | |
07a3b340 YW |
1173 | if (!IN_SET(message->type, DHCP6_MESSAGE_ADVERTISE, DHCP6_MESSAGE_REPLY)) |
1174 | return log_invalid_message_type(client, message); | |
631bbe71 | 1175 | |
65ece4c8 | 1176 | r = dhcp6_lease_new_from_message(client, message, len, timestamp, server_address, &lease); |
631bbe71 | 1177 | if (r < 0) |
07a3b340 YW |
1178 | return log_dhcp6_client_errno(client, r, "Failed to process received %s message, ignoring: %m", |
1179 | dhcp6_message_type_to_string(message->type)); | |
1180 | ||
1181 | if (message->type == DHCP6_MESSAGE_REPLY) { | |
1182 | bool rapid_commit; | |
1183 | ||
4397967f YW |
1184 | if (!client->rapid_commit) |
1185 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EINVAL), | |
1186 | "Received unexpected reply message, even we sent a solicit message without the rapid commit option, ignoring."); | |
1187 | ||
07a3b340 YW |
1188 | r = dhcp6_lease_get_rapid_commit(lease, &rapid_commit); |
1189 | if (r < 0) | |
1190 | return r; | |
1191 | ||
1192 | if (!rapid_commit) | |
1193 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EINVAL), | |
1194 | "Received reply message without rapid commit flag, ignoring."); | |
1195 | ||
cfcc85bb YW |
1196 | log_dhcp6_client(client, "Processed %s message", dhcp6_message_type_to_string(message->type)); |
1197 | ||
07a3b340 YW |
1198 | sd_dhcp6_lease_unref(client->lease); |
1199 | client->lease = TAKE_PTR(lease); | |
1200 | ||
c41bdb17 | 1201 | return client_enter_bound_state(client); |
07a3b340 | 1202 | } |
631bbe71 PF |
1203 | |
1204 | r = dhcp6_lease_get_preference(lease, &pref_advertise); | |
1205 | if (r < 0) | |
1206 | return r; | |
1207 | ||
049fddfa YW |
1208 | if (client->lease) { |
1209 | r = dhcp6_lease_get_preference(client->lease, &pref_lease); | |
1210 | if (r < 0) | |
1211 | return r; | |
1212 | } | |
bbfa43ca | 1213 | |
cfcc85bb YW |
1214 | log_dhcp6_client(client, "Processed %s message", dhcp6_message_type_to_string(message->type)); |
1215 | ||
049fddfa | 1216 | if (!client->lease || pref_advertise > pref_lease) { |
07a3b340 | 1217 | /* If this is the first advertise message or has higher preference, then save the lease. */ |
431a4bc8 YW |
1218 | sd_dhcp6_lease_unref(client->lease); |
1219 | client->lease = TAKE_PTR(lease); | |
631bbe71 PF |
1220 | } |
1221 | ||
cfcc85bb | 1222 | if (pref_advertise == 255 || client->retransmit_count > 1) |
e5d69be2 | 1223 | (void) client_start_transaction(client, DHCP6_STATE_REQUEST); |
7246333c | 1224 | |
07a3b340 | 1225 | return 0; |
631bbe71 PF |
1226 | } |
1227 | ||
004845d1 LP |
1228 | static int client_receive_message( |
1229 | sd_event_source *s, | |
1230 | int fd, uint32_t | |
1231 | revents, | |
1232 | void *userdata) { | |
1233 | ||
6f4490bb | 1234 | sd_dhcp6_client *client = ASSERT_PTR(userdata); |
3f0c075f | 1235 | DHCP6_CLIENT_DONT_DESTROY(client); |
653ddc1d YW |
1236 | /* This needs to be initialized with zero. See #20741. */ |
1237 | CMSG_BUFFER_TYPE(CMSG_SPACE_TIMEVAL) control = {}; | |
1238 | struct iovec iov; | |
ef4edc15 | 1239 | union sockaddr_union sa = {}; |
653ddc1d | 1240 | struct msghdr msg = { |
ef4edc15 YW |
1241 | .msg_name = &sa.sa, |
1242 | .msg_namelen = sizeof(sa), | |
653ddc1d YW |
1243 | .msg_iov = &iov, |
1244 | .msg_iovlen = 1, | |
1245 | .msg_control = &control, | |
1246 | .msg_controllen = sizeof(control), | |
1247 | }; | |
1248 | struct cmsghdr *cmsg; | |
1249 | triple_timestamp t = {}; | |
0d43d2fc | 1250 | _cleanup_free_ DHCP6Message *message = NULL; |
ef4edc15 | 1251 | struct in6_addr *server_address = NULL; |
4edc2c9b | 1252 | ssize_t buflen, len; |
631bbe71 | 1253 | |
4edc2c9b | 1254 | buflen = next_datagram_size_fd(fd); |
ab8a8a4e YW |
1255 | if (buflen < 0) { |
1256 | if (ERRNO_IS_TRANSIENT(buflen) || ERRNO_IS_DISCONNECT(buflen)) | |
1257 | return 0; | |
1258 | ||
1259 | log_dhcp6_client_errno(client, buflen, "Failed to determine datagram size to read, ignoring: %m"); | |
22a3fd2d | 1260 | return 0; |
ab8a8a4e | 1261 | } |
631bbe71 | 1262 | |
0d43d2fc | 1263 | message = malloc(buflen); |
631bbe71 PF |
1264 | if (!message) |
1265 | return -ENOMEM; | |
1266 | ||
653ddc1d YW |
1267 | iov = IOVEC_MAKE(message, buflen); |
1268 | ||
1269 | len = recvmsg_safe(fd, &msg, MSG_DONTWAIT); | |
0d43d2fc | 1270 | if (len < 0) { |
ab8a8a4e | 1271 | if (ERRNO_IS_TRANSIENT(len) || ERRNO_IS_DISCONNECT(len)) |
0d43d2fc TG |
1272 | return 0; |
1273 | ||
ab8a8a4e YW |
1274 | log_dhcp6_client_errno(client, len, "Could not receive message from UDP socket, ignoring: %m"); |
1275 | return 0; | |
004845d1 LP |
1276 | } |
1277 | if ((size_t) len < sizeof(DHCP6Message)) { | |
1278 | log_dhcp6_client(client, "Too small to be DHCP6 message: ignoring"); | |
631bbe71 | 1279 | return 0; |
004845d1 | 1280 | } |
631bbe71 | 1281 | |
ef4edc15 YW |
1282 | /* msg_namelen == 0 happens when running the test-suite over a socketpair */ |
1283 | if (msg.msg_namelen > 0) { | |
1284 | if (msg.msg_namelen != sizeof(struct sockaddr_in6) || sa.in6.sin6_family != AF_INET6) { | |
1285 | log_dhcp6_client(client, "Received message from invalid source, ignoring."); | |
1286 | return 0; | |
1287 | } | |
1288 | ||
1289 | server_address = &sa.in6.sin6_addr; | |
1290 | } | |
1291 | ||
653ddc1d YW |
1292 | CMSG_FOREACH(cmsg, &msg) { |
1293 | if (cmsg->cmsg_level == SOL_SOCKET && | |
1294 | cmsg->cmsg_type == SO_TIMESTAMP && | |
1295 | cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval))) | |
6759b627 | 1296 | triple_timestamp_from_realtime(&t, timeval_load(CMSG_TYPED_DATA(cmsg, struct timeval))); |
653ddc1d YW |
1297 | } |
1298 | ||
d7799877 | 1299 | if (client->transaction_id != (message->transaction_id & htobe32(0x00ffffff))) |
631bbe71 PF |
1300 | return 0; |
1301 | ||
1302 | switch (client->state) { | |
bbfa43ca | 1303 | case DHCP6_STATE_INFORMATION_REQUEST: |
07a3b340 | 1304 | if (client_process_information(client, message, len, &t, server_address) < 0) |
bbfa43ca | 1305 | return 0; |
bbfa43ca PF |
1306 | break; |
1307 | ||
631bbe71 | 1308 | case DHCP6_STATE_SOLICITATION: |
07a3b340 | 1309 | if (client_process_advertise_or_rapid_commit_reply(client, message, len, &t, server_address) < 0) |
d7799877 | 1310 | return 0; |
07a3b340 | 1311 | break; |
631bbe71 | 1312 | |
7246333c | 1313 | case DHCP6_STATE_REQUEST: |
3dc34fcc PF |
1314 | case DHCP6_STATE_RENEW: |
1315 | case DHCP6_STATE_REBIND: | |
07a3b340 | 1316 | if (client_process_reply(client, message, len, &t, server_address) < 0) |
a34b57c0 | 1317 | return 0; |
a34b57c0 PF |
1318 | break; |
1319 | ||
1320 | case DHCP6_STATE_BOUND: | |
631bbe71 | 1321 | case DHCP6_STATE_STOPPED: |
dd5e9378 YW |
1322 | default: |
1323 | assert_not_reached(); | |
631bbe71 PF |
1324 | } |
1325 | ||
a9aff361 PF |
1326 | return 0; |
1327 | } | |
1328 | ||
0ae0e5cd | 1329 | int sd_dhcp6_client_stop(sd_dhcp6_client *client) { |
c8bae363 YW |
1330 | if (!client) |
1331 | return 0; | |
f667c150 | 1332 | |
10c9ce61 | 1333 | client_stop(client, SD_DHCP6_CLIENT_EVENT_STOP); |
139b011a | 1334 | |
8ef959cd | 1335 | client->receive_message = sd_event_source_unref(client->receive_message); |
7ac6c26a PF |
1336 | client->fd = safe_close(client->fd); |
1337 | ||
139b011a PF |
1338 | return 0; |
1339 | } | |
1340 | ||
f667c150 TG |
1341 | int sd_dhcp6_client_is_running(sd_dhcp6_client *client) { |
1342 | assert_return(client, -EINVAL); | |
1343 | ||
1344 | return client->state != DHCP6_STATE_STOPPED; | |
1345 | } | |
1346 | ||
0ae0e5cd | 1347 | int sd_dhcp6_client_start(sd_dhcp6_client *client) { |
dd5e9378 | 1348 | DHCP6State state = DHCP6_STATE_SOLICITATION; |
6d95e7d9 | 1349 | int r; |
139b011a PF |
1350 | |
1351 | assert_return(client, -EINVAL); | |
1352 | assert_return(client->event, -EINVAL); | |
2f8e7633 | 1353 | assert_return(client->ifindex > 0, -EINVAL); |
94876904 | 1354 | assert_return(in6_addr_is_link_local(&client->local_address) > 0, -EINVAL); |
6f4490bb YW |
1355 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); |
1356 | assert_return(client->information_request || client->request_ia != 0, -EINVAL); | |
f311a62b | 1357 | |
af2b4841 YW |
1358 | /* Even if the client is in the STOPPED state, the lease acquired in the previous information |
1359 | * request may be stored. */ | |
1360 | client->lease = sd_dhcp6_lease_unref(client->lease); | |
f12abb48 | 1361 | |
bbfa43ca PF |
1362 | r = client_ensure_iaid(client); |
1363 | if (r < 0) | |
1364 | return r; | |
1365 | ||
cc22955c TH |
1366 | r = client_ensure_duid(client); |
1367 | if (r < 0) | |
1368 | return r; | |
1369 | ||
10a0f27b PF |
1370 | if (client->fd < 0) { |
1371 | r = dhcp6_network_bind_udp_socket(client->ifindex, &client->local_address); | |
84dbb3fd | 1372 | if (r < 0) |
10a0f27b | 1373 | return log_dhcp6_client_errno(client, r, |
84dbb3fd ZJS |
1374 | "Failed to bind to UDP socket at address %s: %m", |
1375 | IN6_ADDR_TO_STRING(&client->local_address)); | |
bd9a7221 | 1376 | |
10a0f27b | 1377 | client->fd = r; |
bd9a7221 | 1378 | } |
bbfa43ca | 1379 | |
8ef959cd YW |
1380 | if (!client->receive_message) { |
1381 | _cleanup_(sd_event_source_disable_unrefp) sd_event_source *s = NULL; | |
1382 | ||
1383 | r = sd_event_add_io(client->event, &s, client->fd, EPOLLIN, client_receive_message, client); | |
1384 | if (r < 0) | |
1385 | return r; | |
1386 | ||
1387 | r = sd_event_source_set_priority(s, client->event_priority); | |
1388 | if (r < 0) | |
1389 | return r; | |
1390 | ||
1391 | r = sd_event_source_set_description(s, "dhcp6-receive-message"); | |
1392 | if (r < 0) | |
1393 | return r; | |
1394 | ||
1395 | client->receive_message = TAKE_PTR(s); | |
1396 | } | |
1397 | ||
fcb51238 YW |
1398 | if (client->information_request) { |
1399 | usec_t t = now(CLOCK_MONOTONIC); | |
1400 | ||
1401 | if (t < usec_add(client->information_request_time_usec, client->information_refresh_time_usec)) | |
1402 | return 0; | |
1403 | ||
1404 | client->information_request_time_usec = t; | |
bbfa43ca | 1405 | state = DHCP6_STATE_INFORMATION_REQUEST; |
fcb51238 | 1406 | } |
bbfa43ca | 1407 | |
65b85f23 | 1408 | log_dhcp6_client(client, "Starting in %s mode", |
0bcc6557 | 1409 | client->information_request ? "Information request" : "Solicit"); |
bbfa43ca | 1410 | |
e5d69be2 | 1411 | return client_start_transaction(client, state); |
139b011a PF |
1412 | } |
1413 | ||
32d20645 | 1414 | int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event, int64_t priority) { |
139b011a PF |
1415 | int r; |
1416 | ||
1417 | assert_return(client, -EINVAL); | |
1418 | assert_return(!client->event, -EBUSY); | |
6f4490bb | 1419 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); |
139b011a PF |
1420 | |
1421 | if (event) | |
1422 | client->event = sd_event_ref(event); | |
1423 | else { | |
1424 | r = sd_event_default(&client->event); | |
1425 | if (r < 0) | |
1426 | return 0; | |
1427 | } | |
1428 | ||
1429 | client->event_priority = priority; | |
1430 | ||
1431 | return 0; | |
1432 | } | |
1433 | ||
1434 | int sd_dhcp6_client_detach_event(sd_dhcp6_client *client) { | |
1435 | assert_return(client, -EINVAL); | |
6f4490bb | 1436 | assert_return(!sd_dhcp6_client_is_running(client), -EBUSY); |
139b011a PF |
1437 | |
1438 | client->event = sd_event_unref(client->event); | |
1439 | ||
1440 | return 0; | |
1441 | } | |
1442 | ||
1443 | sd_event *sd_dhcp6_client_get_event(sd_dhcp6_client *client) { | |
a1140666 | 1444 | assert_return(client, NULL); |
139b011a PF |
1445 | |
1446 | return client->event; | |
1447 | } | |
1448 | ||
793178b9 YW |
1449 | int sd_dhcp6_client_attach_device(sd_dhcp6_client *client, sd_device *dev) { |
1450 | assert_return(client, -EINVAL); | |
1451 | ||
1452 | return device_unref_and_replace(client->dev, dev); | |
1453 | } | |
1454 | ||
8301aa0b | 1455 | static sd_dhcp6_client *dhcp6_client_free(sd_dhcp6_client *client) { |
6f4490bb YW |
1456 | if (!client) |
1457 | return NULL; | |
139b011a | 1458 | |
d0875a07 | 1459 | sd_dhcp6_lease_unref(client->lease); |
c9393e8c | 1460 | |
d0875a07 YW |
1461 | sd_event_source_disable_unref(client->receive_message); |
1462 | sd_event_source_disable_unref(client->timeout_resend); | |
3bb18e70 | 1463 | sd_event_source_disable_unref(client->timeout_expire); |
d0875a07 YW |
1464 | sd_event_source_disable_unref(client->timeout_t1); |
1465 | sd_event_source_disable_unref(client->timeout_t2); | |
6f4490bb | 1466 | sd_event_unref(client->event); |
3733eec3 | 1467 | |
10a0f27b PF |
1468 | client->fd = safe_close(client->fd); |
1469 | ||
793178b9 YW |
1470 | sd_device_unref(client->dev); |
1471 | ||
3733eec3 | 1472 | free(client->req_opts); |
8006aa32 | 1473 | free(client->fqdn); |
de8d6e55 | 1474 | free(client->mudurl); |
877bfc78 | 1475 | dhcp6_ia_clear_addresses(&client->ia_pd); |
e7d5fe17 | 1476 | ordered_hashmap_free(client->extra_options); |
9e4dee4c | 1477 | ordered_set_free(client->vendor_options); |
33923925 | 1478 | strv_free(client->user_class); |
73c8ced7 | 1479 | strv_free(client->vendor_class); |
61a9fa8f | 1480 | free(client->ifname); |
33923925 | 1481 | |
6b430fdb | 1482 | return mfree(client); |
139b011a PF |
1483 | } |
1484 | ||
8301aa0b YW |
1485 | DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp6_client, sd_dhcp6_client, dhcp6_client_free); |
1486 | ||
0ae0e5cd | 1487 | int sd_dhcp6_client_new(sd_dhcp6_client **ret) { |
4afd3348 | 1488 | _cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL; |
139b011a PF |
1489 | |
1490 | assert_return(ret, -EINVAL); | |
1491 | ||
8b8ecac8 YW |
1492 | client = new(sd_dhcp6_client, 1); |
1493 | if (!client) | |
da6fe470 PF |
1494 | return -ENOMEM; |
1495 | ||
8b8ecac8 YW |
1496 | *client = (sd_dhcp6_client) { |
1497 | .n_ref = 1, | |
1498 | .ia_na.type = SD_DHCP6_OPTION_IA_NA, | |
1499 | .ia_pd.type = SD_DHCP6_OPTION_IA_PD, | |
1500 | .ifindex = -1, | |
01b4e90f | 1501 | .request_ia = DHCP6_REQUEST_IA_NA | DHCP6_REQUEST_IA_PD, |
254d1313 | 1502 | .fd = -EBADF, |
4397967f | 1503 | .rapid_commit = true, |
8b8ecac8 | 1504 | }; |
da6fe470 | 1505 | |
1cc6c93a | 1506 | *ret = TAKE_PTR(client); |
139b011a PF |
1507 | |
1508 | return 0; | |
1509 | } |