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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> | |
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" |
07630cea | 14 | #include "dhcp-identifier.h" |
f12abb48 | 15 | #include "dhcp6-internal.h" |
631bbe71 | 16 | #include "dhcp6-lease-internal.h" |
07630cea | 17 | #include "dhcp6-protocol.h" |
8006aa32 | 18 | #include "dns-domain.h" |
c9393e8c | 19 | #include "event-util.h" |
3ffd4af2 | 20 | #include "fd-util.h" |
8006aa32 | 21 | #include "hostname-util.h" |
c601ebf7 | 22 | #include "in-addr-util.h" |
07630cea LP |
23 | #include "network-internal.h" |
24 | #include "random-util.h" | |
4edc2c9b | 25 | #include "socket-util.h" |
8b43440b | 26 | #include "string-table.h" |
07630cea | 27 | #include "util.h" |
de8d6e55 | 28 | #include "web-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; |
2805536b | 49 | DHCP6Address hint_pd_prefix; |
c601ebf7 | 50 | struct in6_addr local_address; |
76253e73 DW |
51 | uint8_t mac_addr[MAX_MAC_ADDR_LEN]; |
52 | size_t mac_addr_len; | |
53 | uint16_t arp_type; | |
f12abb48 | 54 | DHCP6IA ia_na; |
dce6563f | 55 | DHCP6IA ia_pd; |
9a7225de PF |
56 | sd_event_source *timeout_t1; |
57 | sd_event_source *timeout_t2; | |
1346489f | 58 | unsigned request; |
a9aff361 | 59 | be32_t transaction_id; |
346e13a2 | 60 | usec_t transaction_start; |
631bbe71 | 61 | struct sd_dhcp6_lease *lease; |
a9aff361 | 62 | int fd; |
bbfa43ca | 63 | bool information_request; |
8217ed5e | 64 | bool iaid_set; |
da6fe470 PF |
65 | be16_t *req_opts; |
66 | size_t req_opts_allocated; | |
67 | size_t req_opts_len; | |
8006aa32 | 68 | char *fqdn; |
de8d6e55 | 69 | char *mudurl; |
33923925 | 70 | char **user_class; |
73c8ced7 | 71 | char **vendor_class; |
a9aff361 | 72 | sd_event_source *receive_message; |
d1b0afe3 PF |
73 | usec_t retransmit_time; |
74 | uint8_t retransmit_count; | |
75 | sd_event_source *timeout_resend; | |
76 | sd_event_source *timeout_resend_expire; | |
45aa74c7 | 77 | sd_dhcp6_client_callback_t callback; |
139b011a | 78 | void *userdata; |
764aad62 | 79 | struct duid duid; |
66eac120 | 80 | size_t duid_len; |
fcb51238 YW |
81 | usec_t information_request_time_usec; |
82 | usec_t information_refresh_time_usec; | |
e7d5fe17 | 83 | OrderedHashmap *extra_options; |
99ccb8ff | 84 | OrderedHashmap *vendor_options; |
139b011a PF |
85 | }; |
86 | ||
da6fe470 | 87 | static const uint16_t default_req_opts[] = { |
2c1ab8ca BG |
88 | SD_DHCP6_OPTION_DNS_SERVERS, |
89 | SD_DHCP6_OPTION_DOMAIN_LIST, | |
90 | SD_DHCP6_OPTION_NTP_SERVER, | |
91 | SD_DHCP6_OPTION_SNTP_SERVERS, | |
da6fe470 PF |
92 | }; |
93 | ||
a9aff361 PF |
94 | const char * dhcp6_message_type_table[_DHCP6_MESSAGE_MAX] = { |
95 | [DHCP6_SOLICIT] = "SOLICIT", | |
96 | [DHCP6_ADVERTISE] = "ADVERTISE", | |
97 | [DHCP6_REQUEST] = "REQUEST", | |
98 | [DHCP6_CONFIRM] = "CONFIRM", | |
99 | [DHCP6_RENEW] = "RENEW", | |
100 | [DHCP6_REBIND] = "REBIND", | |
101 | [DHCP6_REPLY] = "REPLY", | |
102 | [DHCP6_RELEASE] = "RELEASE", | |
103 | [DHCP6_DECLINE] = "DECLINE", | |
104 | [DHCP6_RECONFIGURE] = "RECONFIGURE", | |
105 | [DHCP6_INFORMATION_REQUEST] = "INFORMATION-REQUEST", | |
106 | [DHCP6_RELAY_FORW] = "RELAY-FORW", | |
107 | [DHCP6_RELAY_REPL] = "RELAY-REPL", | |
108 | }; | |
109 | ||
110 | DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_type, int); | |
111 | ||
631bbe71 | 112 | const char * dhcp6_message_status_table[_DHCP6_STATUS_MAX] = { |
76643fed SS |
113 | [DHCP6_STATUS_SUCCESS] = "Success", |
114 | [DHCP6_STATUS_UNSPEC_FAIL] = "Unspecified failure", | |
115 | [DHCP6_STATUS_NO_ADDRS_AVAIL] = "No addresses available", | |
116 | [DHCP6_STATUS_NO_BINDING] = "Binding unavailable", | |
117 | [DHCP6_STATUS_NOT_ON_LINK] = "Not on link", | |
118 | [DHCP6_STATUS_USE_MULTICAST] = "Use multicast", | |
119 | [DHCP6_STATUS_NO_PREFIX_AVAIL] = "No prefix available", | |
120 | [DHCP6_STATUS_UNKNOWN_QUERY_TYPE] = "Unknown query type", | |
121 | [DHCP6_STATUS_MALFORMED_QUERY] = "Malformed query", | |
122 | [DHCP6_STATUS_NOT_CONFIGURED] = "Not configured", | |
123 | [DHCP6_STATUS_NOT_ALLOWED] = "Not allowed", | |
124 | [DHCP6_STATUS_QUERY_TERMINATED] = "Query terminated", | |
125 | [DHCP6_STATUS_DATA_MISSING] = "Data missing", | |
126 | [DHCP6_STATUS_CATCHUP_COMPLETE] = "Catch up complete", | |
127 | [DHCP6_STATUS_NOT_SUPPORTED] = "Not supported", | |
128 | [DHCP6_STATUS_TLS_CONNECTION_REFUSED] = "TLS connection refused", | |
129 | [DHCP6_STATUS_ADDRESS_IN_USE] = "Address in use", | |
130 | [DHCP6_STATUS_CONFIGURATION_CONFLICT] = "Configuration conflict", | |
131 | [DHCP6_STATUS_MISSING_BINDING_INFORMATION] = "Missing binding information", | |
132 | [DHCP6_STATUS_OUTDATED_BINDING_INFORMATION] = "Outdated binding information", | |
133 | [DHCP6_STATUS_SERVER_SHUTTING_DOWN] = "Server shutting down", | |
134 | [DHCP6_STATUS_DNS_UPDATE_NOT_SUPPORTED] = "DNS update not supported", | |
135 | [DHCP6_STATUS_EXCESSIVE_TIME_SKEW] = "Excessive time skew", | |
631bbe71 PF |
136 | }; |
137 | ||
138 | DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_status, int); | |
139 | ||
3f0c075f | 140 | #define DHCP6_CLIENT_DONT_DESTROY(client) \ |
4afd3348 | 141 | _cleanup_(sd_dhcp6_client_unrefp) _unused_ sd_dhcp6_client *_dont_destroy_##client = sd_dhcp6_client_ref(client) |
3f0c075f | 142 | |
c3e2adea PF |
143 | static int client_start(sd_dhcp6_client *client, enum DHCP6State state); |
144 | ||
4b558378 ZJS |
145 | int sd_dhcp6_client_set_callback( |
146 | sd_dhcp6_client *client, | |
147 | sd_dhcp6_client_callback_t cb, | |
148 | void *userdata) { | |
45aa74c7 | 149 | |
139b011a PF |
150 | assert_return(client, -EINVAL); |
151 | ||
45aa74c7 | 152 | client->callback = cb; |
139b011a PF |
153 | client->userdata = userdata; |
154 | ||
155 | return 0; | |
156 | } | |
157 | ||
2f8e7633 | 158 | int sd_dhcp6_client_set_ifindex(sd_dhcp6_client *client, int ifindex) { |
139b011a | 159 | |
2f8e7633 LP |
160 | assert_return(client, -EINVAL); |
161 | assert_return(ifindex >= -1, -EINVAL); | |
d7c9c21f PF |
162 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
163 | ||
2f8e7633 | 164 | client->ifindex = ifindex; |
139b011a PF |
165 | return 0; |
166 | } | |
167 | ||
4b558378 ZJS |
168 | int sd_dhcp6_client_set_local_address( |
169 | sd_dhcp6_client *client, | |
170 | const struct in6_addr *local_address) { | |
171 | ||
c601ebf7 TG |
172 | assert_return(client, -EINVAL); |
173 | assert_return(local_address, -EINVAL); | |
174 | assert_return(in_addr_is_link_local(AF_INET6, (const union in_addr_union *) local_address) > 0, -EINVAL); | |
175 | ||
176 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); | |
177 | ||
178 | client->local_address = *local_address; | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
0ae0e5cd LP |
183 | int sd_dhcp6_client_set_mac( |
184 | sd_dhcp6_client *client, | |
185 | const uint8_t *addr, size_t addr_len, | |
186 | uint16_t arp_type) { | |
187 | ||
139b011a | 188 | assert_return(client, -EINVAL); |
76253e73 DW |
189 | assert_return(addr, -EINVAL); |
190 | assert_return(addr_len > 0 && addr_len <= MAX_MAC_ADDR_LEN, -EINVAL); | |
191 | assert_return(arp_type > 0, -EINVAL); | |
192 | ||
d7c9c21f PF |
193 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
194 | ||
76253e73 DW |
195 | if (arp_type == ARPHRD_ETHER) |
196 | assert_return(addr_len == ETH_ALEN, -EINVAL); | |
197 | else if (arp_type == ARPHRD_INFINIBAND) | |
198 | assert_return(addr_len == INFINIBAND_ALEN, -EINVAL); | |
139b011a | 199 | else |
76253e73 DW |
200 | return -EINVAL; |
201 | ||
202 | if (client->mac_addr_len == addr_len && | |
203 | memcmp(&client->mac_addr, addr, addr_len) == 0) | |
204 | return 0; | |
205 | ||
206 | memcpy(&client->mac_addr, addr, addr_len); | |
207 | client->mac_addr_len = addr_len; | |
208 | client->arp_type = arp_type; | |
139b011a PF |
209 | |
210 | return 0; | |
211 | } | |
212 | ||
2805536b SS |
213 | int sd_dhcp6_client_set_prefix_delegation_hint( |
214 | sd_dhcp6_client *client, | |
215 | uint8_t prefixlen, | |
216 | const struct in6_addr *pd_address) { | |
217 | ||
218 | assert_return(client, -EINVAL); | |
219 | assert_return(pd_address, -EINVAL); | |
220 | ||
221 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); | |
222 | ||
223 | client->hint_pd_prefix.iapdprefix.address = *pd_address; | |
224 | client->hint_pd_prefix.iapdprefix.prefixlen = prefixlen; | |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
99ccb8ff SS |
229 | int sd_dhcp6_client_add_vendor_option(sd_dhcp6_client *client, sd_dhcp6_option *v) { |
230 | int r; | |
231 | ||
232 | assert_return(client, -EINVAL); | |
233 | assert_return(v, -EINVAL); | |
234 | ||
235 | r = ordered_hashmap_ensure_allocated(&client->vendor_options, &dhcp6_option_hash_ops); | |
236 | if (r < 0) | |
237 | return r; | |
238 | ||
239 | r = ordered_hashmap_put(client->vendor_options, v, v); | |
240 | if (r < 0) | |
241 | return r; | |
242 | ||
243 | sd_dhcp6_option_ref(v); | |
244 | ||
245 | return 1; | |
246 | } | |
247 | ||
0ae0e5cd | 248 | static int client_ensure_duid(sd_dhcp6_client *client) { |
cc22955c TH |
249 | if (client->duid_len != 0) |
250 | return 0; | |
0ae0e5cd | 251 | |
cc22955c TH |
252 | return dhcp_identifier_set_duid_en(&client->duid, &client->duid_len); |
253 | } | |
254 | ||
d7df2fd3 ZJS |
255 | /** |
256 | * Sets DUID. If duid is non-null, the DUID is set to duid_type + duid | |
257 | * without further modification. Otherwise, if duid_type is supported, DUID | |
258 | * is set based on that type. Otherwise, an error is returned. | |
259 | */ | |
7e90a499 | 260 | static int dhcp6_client_set_duid_internal( |
4b558378 ZJS |
261 | sd_dhcp6_client *client, |
262 | uint16_t duid_type, | |
f7a92d1a | 263 | const void *duid, |
7e90a499 YW |
264 | size_t duid_len, |
265 | usec_t llt_time) { | |
413708d1 | 266 | int r; |
27eba50e | 267 | |
66eac120 | 268 | assert_return(client, -EINVAL); |
d7df2fd3 | 269 | assert_return(duid_len == 0 || duid != NULL, -EINVAL); |
afec4539 | 270 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
c83321e6 | 271 | |
d7df2fd3 | 272 | if (duid != NULL) { |
ab4a88bc TH |
273 | r = dhcp_validate_duid_len(duid_type, duid_len, true); |
274 | if (r < 0) { | |
275 | r = dhcp_validate_duid_len(duid_type, duid_len, false); | |
276 | if (r < 0) | |
a339859f | 277 | return log_dhcp6_client_errno(client, r, "Failed to validate length of DUID: %m"); |
01bcea49 LP |
278 | |
279 | log_dhcp6_client(client, "Using DUID of type %u of incorrect length, proceeding.", duid_type); | |
ab4a88bc | 280 | } |
d7df2fd3 | 281 | |
413708d1 VK |
282 | client->duid.type = htobe16(duid_type); |
283 | memcpy(&client->duid.raw.data, duid, duid_len); | |
d7df2fd3 | 284 | client->duid_len = sizeof(client->duid.type) + duid_len; |
d7df2fd3 | 285 | } else |
27eba50e | 286 | switch (duid_type) { |
335f80a6 | 287 | case DUID_TYPE_LLT: |
339697f0 | 288 | if (client->mac_addr_len == 0) |
a339859f | 289 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EOPNOTSUPP), "Failed to set DUID-LLT, MAC address is not set."); |
335f80a6 | 290 | |
53253d9c | 291 | r = dhcp_identifier_set_duid_llt(&client->duid, llt_time, client->mac_addr, client->mac_addr_len, client->arp_type, &client->duid_len); |
335f80a6 | 292 | if (r < 0) |
a339859f | 293 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-LLT: %m"); |
335f80a6 | 294 | break; |
27eba50e YW |
295 | case DUID_TYPE_EN: |
296 | r = dhcp_identifier_set_duid_en(&client->duid, &client->duid_len); | |
297 | if (r < 0) | |
a339859f | 298 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-EN: %m"); |
27eba50e | 299 | break; |
335f80a6 | 300 | case DUID_TYPE_LL: |
339697f0 | 301 | if (client->mac_addr_len == 0) |
a339859f | 302 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EOPNOTSUPP), "Failed to set DUID-LL, MAC address is not set."); |
335f80a6 YW |
303 | |
304 | r = dhcp_identifier_set_duid_ll(&client->duid, client->mac_addr, client->mac_addr_len, client->arp_type, &client->duid_len); | |
305 | if (r < 0) | |
a339859f | 306 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-LL: %m"); |
335f80a6 | 307 | break; |
27eba50e YW |
308 | case DUID_TYPE_UUID: |
309 | r = dhcp_identifier_set_duid_uuid(&client->duid, &client->duid_len); | |
310 | if (r < 0) | |
a339859f | 311 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-UUID: %m"); |
27eba50e YW |
312 | break; |
313 | default: | |
a339859f | 314 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EINVAL), "Invalid DUID type"); |
27eba50e | 315 | } |
fe4b2156 | 316 | |
413708d1 VK |
317 | return 0; |
318 | } | |
319 | ||
7e90a499 YW |
320 | int sd_dhcp6_client_set_duid( |
321 | sd_dhcp6_client *client, | |
322 | uint16_t duid_type, | |
323 | const void *duid, | |
324 | size_t duid_len) { | |
325 | return dhcp6_client_set_duid_internal(client, duid_type, duid, duid_len, 0); | |
326 | } | |
327 | ||
328 | int sd_dhcp6_client_set_duid_llt( | |
329 | sd_dhcp6_client *client, | |
330 | usec_t llt_time) { | |
331 | return dhcp6_client_set_duid_internal(client, DUID_TYPE_LLT, NULL, 0, llt_time); | |
332 | } | |
333 | ||
413708d1 VK |
334 | int sd_dhcp6_client_set_iaid(sd_dhcp6_client *client, uint32_t iaid) { |
335 | assert_return(client, -EINVAL); | |
336 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); | |
337 | ||
e0026dcb | 338 | client->ia_na.ia_na.id = htobe32(iaid); |
dce6563f | 339 | client->ia_pd.ia_pd.id = htobe32(iaid); |
8217ed5e | 340 | client->iaid_set = true; |
66eac120 DW |
341 | |
342 | return 0; | |
343 | } | |
344 | ||
8006aa32 SA |
345 | int sd_dhcp6_client_set_fqdn( |
346 | sd_dhcp6_client *client, | |
347 | const char *fqdn) { | |
348 | ||
349 | assert_return(client, -EINVAL); | |
350 | ||
351 | /* Make sure FQDN qualifies as DNS and as Linux hostname */ | |
352 | if (fqdn && | |
353 | !(hostname_is_valid(fqdn, false) && dns_name_is_valid(fqdn) > 0)) | |
354 | return -EINVAL; | |
355 | ||
356 | return free_and_strdup(&client->fqdn, fqdn); | |
357 | } | |
358 | ||
04c01369 | 359 | int sd_dhcp6_client_set_information_request(sd_dhcp6_client *client, int enabled) { |
bbfa43ca | 360 | assert_return(client, -EINVAL); |
d7c9c21f PF |
361 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
362 | ||
bbfa43ca PF |
363 | client->information_request = enabled; |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
04c01369 | 368 | int sd_dhcp6_client_get_information_request(sd_dhcp6_client *client, int *enabled) { |
bbfa43ca PF |
369 | assert_return(client, -EINVAL); |
370 | assert_return(enabled, -EINVAL); | |
371 | ||
372 | *enabled = client->information_request; | |
373 | ||
374 | return 0; | |
375 | } | |
376 | ||
0ae0e5cd | 377 | int sd_dhcp6_client_set_request_option(sd_dhcp6_client *client, uint16_t option) { |
da6fe470 PF |
378 | size_t t; |
379 | ||
380 | assert_return(client, -EINVAL); | |
381 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
382 | ||
2d3adfa6 | 383 | if (option <= 0 || option >= UINT8_MAX) |
da6fe470 | 384 | return -EINVAL; |
da6fe470 PF |
385 | |
386 | for (t = 0; t < client->req_opts_len; t++) | |
387 | if (client->req_opts[t] == htobe16(option)) | |
388 | return -EEXIST; | |
389 | ||
390 | if (!GREEDY_REALLOC(client->req_opts, client->req_opts_allocated, | |
391 | client->req_opts_len + 1)) | |
392 | return -ENOMEM; | |
393 | ||
394 | client->req_opts[client->req_opts_len++] = htobe16(option); | |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
feb7d7a2 | 399 | int sd_dhcp6_client_set_request_mud_url(sd_dhcp6_client *client, const char *mudurl) { |
de8d6e55 SS |
400 | |
401 | assert_return(client, -EINVAL); | |
402 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
403 | assert_return(mudurl, -EINVAL); | |
2d3adfa6 | 404 | assert_return(strlen(mudurl) <= UINT8_MAX, -EINVAL); |
de8d6e55 SS |
405 | assert_return(http_url_is_valid(mudurl), -EINVAL); |
406 | ||
407 | return free_and_strdup(&client->mudurl, mudurl); | |
408 | } | |
409 | ||
33923925 SS |
410 | int sd_dhcp6_client_set_request_user_class(sd_dhcp6_client *client, char **user_class) { |
411 | _cleanup_strv_free_ char **s = NULL; | |
412 | char **p; | |
413 | ||
414 | assert_return(client, -EINVAL); | |
415 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
73c8ced7 | 416 | |
33923925 SS |
417 | assert_return(user_class, -EINVAL); |
418 | ||
419 | STRV_FOREACH(p, user_class) | |
420 | if (strlen(*p) > UINT16_MAX) | |
421 | return -ENAMETOOLONG; | |
422 | ||
2d3adfa6 | 423 | s = strv_copy(user_class); |
33923925 SS |
424 | if (!s) |
425 | return -ENOMEM; | |
426 | ||
427 | client->user_class = TAKE_PTR(s); | |
428 | ||
429 | return 0; | |
430 | } | |
431 | ||
73c8ced7 SS |
432 | int sd_dhcp6_client_set_request_vendor_class(sd_dhcp6_client *client, char **vendor_class) { |
433 | _cleanup_strv_free_ char **s = NULL; | |
434 | char **p; | |
435 | ||
436 | assert_return(client, -EINVAL); | |
437 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
438 | assert_return(vendor_class, -EINVAL); | |
439 | ||
440 | STRV_FOREACH(p, vendor_class) | |
441 | if (strlen(*p) > UINT8_MAX) | |
442 | return -ENAMETOOLONG; | |
443 | ||
444 | s = strv_copy(vendor_class); | |
445 | if (!s) | |
446 | return -ENOMEM; | |
447 | ||
448 | client->vendor_class = TAKE_PTR(s); | |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
d8c51121 PF |
453 | int sd_dhcp6_client_get_prefix_delegation(sd_dhcp6_client *client, int *delegation) { |
454 | assert_return(client, -EINVAL); | |
455 | assert_return(delegation, -EINVAL); | |
456 | ||
f311a62b | 457 | *delegation = FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD); |
d8c51121 PF |
458 | |
459 | return 0; | |
460 | } | |
461 | ||
462 | int sd_dhcp6_client_set_prefix_delegation(sd_dhcp6_client *client, int delegation) { | |
7c3de8f8 PF |
463 | assert_return(client, -EINVAL); |
464 | ||
f311a62b PF |
465 | SET_FLAG(client->request, DHCP6_REQUEST_IA_PD, delegation); |
466 | ||
467 | return 0; | |
468 | } | |
469 | ||
470 | int sd_dhcp6_client_get_address_request(sd_dhcp6_client *client, int *request) { | |
471 | assert_return(client, -EINVAL); | |
472 | assert_return(request, -EINVAL); | |
473 | ||
474 | *request = FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA); | |
475 | ||
476 | return 0; | |
477 | } | |
478 | ||
479 | int sd_dhcp6_client_set_address_request(sd_dhcp6_client *client, int request) { | |
480 | assert_return(client, -EINVAL); | |
481 | ||
482 | SET_FLAG(client->request, DHCP6_REQUEST_IA_NA, request); | |
7c3de8f8 PF |
483 | |
484 | return 0; | |
485 | } | |
486 | ||
b62f9008 | 487 | int sd_dhcp6_client_set_transaction_id(sd_dhcp6_client *client, uint32_t transaction_id) { |
d89a400e EV |
488 | assert_return(client, -EINVAL); |
489 | ||
490 | client->transaction_id = transaction_id; | |
491 | ||
492 | return 0; | |
493 | } | |
494 | ||
ea3b3a75 PF |
495 | int sd_dhcp6_client_get_lease(sd_dhcp6_client *client, sd_dhcp6_lease **ret) { |
496 | assert_return(client, -EINVAL); | |
ea3b3a75 PF |
497 | |
498 | if (!client->lease) | |
499 | return -ENOMSG; | |
500 | ||
3098562c TG |
501 | if (ret) |
502 | *ret = client->lease; | |
ea3b3a75 PF |
503 | |
504 | return 0; | |
505 | } | |
506 | ||
e7d5fe17 AD |
507 | int sd_dhcp6_client_add_option(sd_dhcp6_client *client, sd_dhcp6_option *v) { |
508 | int r; | |
509 | ||
510 | assert_return(client, -EINVAL); | |
511 | assert_return(v, -EINVAL); | |
512 | ||
513 | r = ordered_hashmap_ensure_allocated(&client->extra_options, &dhcp6_option_hash_ops); | |
514 | if (r < 0) | |
515 | return r; | |
516 | ||
517 | r = ordered_hashmap_put(client->extra_options, UINT_TO_PTR(v->option), v); | |
518 | if (r < 0) | |
519 | return r; | |
520 | ||
521 | sd_dhcp6_option_ref(v); | |
522 | return 0; | |
523 | } | |
524 | ||
3f0c075f | 525 | static void client_notify(sd_dhcp6_client *client, int event) { |
45aa74c7 LP |
526 | assert(client); |
527 | ||
528 | if (client->callback) | |
529 | client->callback(client, event, client->userdata); | |
139b011a PF |
530 | } |
531 | ||
f8908727 | 532 | static int client_reset(sd_dhcp6_client *client) { |
a1140666 | 533 | assert(client); |
f8908727 | 534 | |
431a4bc8 | 535 | client->lease = sd_dhcp6_lease_unref(client->lease); |
4e3e6679 | 536 | |
a9aff361 PF |
537 | client->receive_message = |
538 | sd_event_source_unref(client->receive_message); | |
539 | ||
c3e2adea | 540 | client->transaction_id = 0; |
346e13a2 | 541 | client->transaction_start = 0; |
a9aff361 | 542 | |
d1b0afe3 PF |
543 | client->retransmit_time = 0; |
544 | client->retransmit_count = 0; | |
d1b0afe3 | 545 | |
c9393e8c YW |
546 | (void) event_source_disable(client->timeout_resend); |
547 | (void) event_source_disable(client->timeout_resend_expire); | |
548 | (void) event_source_disable(client->timeout_t1); | |
549 | (void) event_source_disable(client->timeout_t2); | |
213e759a | 550 | |
139b011a PF |
551 | client->state = DHCP6_STATE_STOPPED; |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
3f0c075f PF |
556 | static void client_stop(sd_dhcp6_client *client, int error) { |
557 | DHCP6_CLIENT_DONT_DESTROY(client); | |
139b011a | 558 | |
3f0c075f | 559 | assert(client); |
139b011a | 560 | |
3f0c075f PF |
561 | client_notify(client, error); |
562 | ||
563 | client_reset(client); | |
139b011a PF |
564 | } |
565 | ||
346e13a2 | 566 | static int client_send_message(sd_dhcp6_client *client, usec_t time_now) { |
a9aff361 PF |
567 | _cleanup_free_ DHCP6Message *message = NULL; |
568 | struct in6_addr all_servers = | |
569 | IN6ADDR_ALL_DHCP6_RELAY_AGENTS_AND_SERVERS_INIT; | |
e7d5fe17 | 570 | struct sd_dhcp6_option *j; |
a9aff361 | 571 | size_t len, optlen = 512; |
e7d5fe17 | 572 | Iterator i; |
a9aff361 PF |
573 | uint8_t *opt; |
574 | int r; | |
346e13a2 PF |
575 | usec_t elapsed_usec; |
576 | be16_t elapsed_time; | |
a9aff361 | 577 | |
a1140666 LP |
578 | assert(client); |
579 | ||
a9aff361 PF |
580 | len = sizeof(DHCP6Message) + optlen; |
581 | ||
582 | message = malloc0(len); | |
583 | if (!message) | |
584 | return -ENOMEM; | |
585 | ||
586 | opt = (uint8_t *)(message + 1); | |
587 | ||
588 | message->transaction_id = client->transaction_id; | |
589 | ||
590 | switch(client->state) { | |
bbfa43ca PF |
591 | case DHCP6_STATE_INFORMATION_REQUEST: |
592 | message->type = DHCP6_INFORMATION_REQUEST; | |
593 | ||
de8d6e55 SS |
594 | if (client->mudurl) { |
595 | r = dhcp6_option_append(&opt, &optlen, | |
596 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
597 | client->mudurl); | |
598 | if (r < 0) | |
599 | return r; | |
600 | } | |
601 | ||
bbfa43ca PF |
602 | break; |
603 | ||
a9aff361 PF |
604 | case DHCP6_STATE_SOLICITATION: |
605 | message->type = DHCP6_SOLICIT; | |
606 | ||
ed6ee219 | 607 | r = dhcp6_option_append(&opt, &optlen, |
2c1ab8ca | 608 | SD_DHCP6_OPTION_RAPID_COMMIT, 0, NULL); |
926695f1 TA |
609 | if (r < 0) |
610 | return r; | |
ed6ee219 | 611 | |
f311a62b PF |
612 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
613 | r = dhcp6_option_append_ia(&opt, &optlen, | |
614 | &client->ia_na); | |
615 | if (r < 0) | |
616 | return r; | |
617 | } | |
a9aff361 | 618 | |
8006aa32 SA |
619 | if (client->fqdn) { |
620 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
621 | if (r < 0) | |
622 | return r; | |
623 | } | |
624 | ||
de8d6e55 SS |
625 | if (client->mudurl) { |
626 | r = dhcp6_option_append(&opt, &optlen, | |
627 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
628 | client->mudurl); | |
629 | if (r < 0) | |
630 | return r; | |
631 | } | |
632 | ||
33923925 SS |
633 | if (client->user_class) { |
634 | r = dhcp6_option_append_user_class(&opt, &optlen, client->user_class); | |
635 | if (r < 0) | |
636 | return r; | |
637 | } | |
638 | ||
73c8ced7 SS |
639 | if (client->vendor_class) { |
640 | r = dhcp6_option_append_vendor_class(&opt, &optlen, client->vendor_class); | |
641 | if (r < 0) | |
642 | return r; | |
643 | } | |
644 | ||
99ccb8ff SS |
645 | if (!ordered_hashmap_isempty(client->vendor_options)) { |
646 | r = dhcp6_option_append_vendor_option(&opt, &optlen, | |
647 | client->vendor_options); | |
648 | if (r < 0) | |
649 | return r; | |
650 | } | |
651 | ||
f311a62b | 652 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
2805536b | 653 | r = dhcp6_option_append_pd(opt, optlen, &client->ia_pd, &client->hint_pd_prefix); |
7c3de8f8 PF |
654 | if (r < 0) |
655 | return r; | |
656 | ||
657 | opt += r; | |
658 | optlen -= r; | |
659 | } | |
660 | ||
7246333c PF |
661 | break; |
662 | ||
663 | case DHCP6_STATE_REQUEST: | |
3dc34fcc PF |
664 | case DHCP6_STATE_RENEW: |
665 | ||
666 | if (client->state == DHCP6_STATE_REQUEST) | |
667 | message->type = DHCP6_REQUEST; | |
668 | else | |
669 | message->type = DHCP6_RENEW; | |
7246333c | 670 | |
2c1ab8ca | 671 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_SERVERID, |
7246333c PF |
672 | client->lease->serverid_len, |
673 | client->lease->serverid); | |
674 | if (r < 0) | |
675 | return r; | |
676 | ||
f311a62b PF |
677 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
678 | r = dhcp6_option_append_ia(&opt, &optlen, | |
679 | &client->lease->ia); | |
680 | if (r < 0) | |
681 | return r; | |
682 | } | |
a9aff361 | 683 | |
8006aa32 SA |
684 | if (client->fqdn) { |
685 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
686 | if (r < 0) | |
687 | return r; | |
688 | } | |
689 | ||
de8d6e55 SS |
690 | if (client->mudurl) { |
691 | r = dhcp6_option_append(&opt, &optlen, | |
692 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
693 | client->mudurl); | |
694 | if (r < 0) | |
695 | return r; | |
696 | } | |
697 | ||
33923925 SS |
698 | if (client->user_class) { |
699 | r = dhcp6_option_append_user_class(&opt, &optlen, client->user_class); | |
700 | if (r < 0) | |
701 | return r; | |
702 | } | |
703 | ||
73c8ced7 SS |
704 | if (client->vendor_class) { |
705 | r = dhcp6_option_append_vendor_class(&opt, &optlen, client->vendor_class); | |
706 | if (r < 0) | |
707 | return r; | |
708 | } | |
709 | ||
99ccb8ff SS |
710 | if (!ordered_hashmap_isempty(client->vendor_options)) { |
711 | r = dhcp6_option_append_vendor_option(&opt, &optlen, client->vendor_options); | |
712 | if (r < 0) | |
713 | return r; | |
714 | } | |
715 | ||
f311a62b | 716 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
2805536b | 717 | r = dhcp6_option_append_pd(opt, optlen, &client->lease->pd, NULL); |
7c3de8f8 PF |
718 | if (r < 0) |
719 | return r; | |
720 | ||
721 | opt += r; | |
722 | optlen -= r; | |
723 | } | |
724 | ||
a9aff361 PF |
725 | break; |
726 | ||
3dc34fcc PF |
727 | case DHCP6_STATE_REBIND: |
728 | message->type = DHCP6_REBIND; | |
729 | ||
f311a62b PF |
730 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
731 | r = dhcp6_option_append_ia(&opt, &optlen, &client->lease->ia); | |
732 | if (r < 0) | |
733 | return r; | |
734 | } | |
3dc34fcc | 735 | |
8006aa32 SA |
736 | if (client->fqdn) { |
737 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
738 | if (r < 0) | |
739 | return r; | |
740 | } | |
741 | ||
de8d6e55 SS |
742 | if (client->mudurl) { |
743 | r = dhcp6_option_append(&opt, &optlen, | |
744 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
745 | client->mudurl); | |
746 | if (r < 0) | |
747 | return r; | |
748 | } | |
749 | ||
33923925 SS |
750 | if (client->user_class) { |
751 | r = dhcp6_option_append_user_class(&opt, &optlen, client->user_class); | |
752 | if (r < 0) | |
753 | return r; | |
754 | } | |
755 | ||
73c8ced7 SS |
756 | if (client->vendor_class) { |
757 | r = dhcp6_option_append_vendor_class(&opt, &optlen, client->vendor_class); | |
758 | if (r < 0) | |
759 | return r; | |
760 | } | |
761 | ||
99ccb8ff SS |
762 | if (!ordered_hashmap_isempty(client->vendor_options)) { |
763 | r = dhcp6_option_append_vendor_option(&opt, &optlen, client->vendor_options); | |
764 | if (r < 0) | |
765 | return r; | |
766 | } | |
767 | ||
f311a62b | 768 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
2805536b | 769 | r = dhcp6_option_append_pd(opt, optlen, &client->lease->pd, NULL); |
7c3de8f8 PF |
770 | if (r < 0) |
771 | return r; | |
772 | ||
773 | opt += r; | |
774 | optlen -= r; | |
775 | } | |
776 | ||
3dc34fcc PF |
777 | break; |
778 | ||
a9aff361 | 779 | case DHCP6_STATE_STOPPED: |
a34b57c0 | 780 | case DHCP6_STATE_BOUND: |
a9aff361 PF |
781 | return -EINVAL; |
782 | } | |
783 | ||
2c1ab8ca | 784 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ORO, |
da6fe470 PF |
785 | client->req_opts_len * sizeof(be16_t), |
786 | client->req_opts); | |
787 | if (r < 0) | |
788 | return r; | |
789 | ||
ccd1fc2f | 790 | assert(client->duid_len); |
2c1ab8ca | 791 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_CLIENTID, |
66eac120 | 792 | client->duid_len, &client->duid); |
7246333c PF |
793 | if (r < 0) |
794 | return r; | |
795 | ||
346e13a2 PF |
796 | elapsed_usec = time_now - client->transaction_start; |
797 | if (elapsed_usec < 0xffff * USEC_PER_MSEC * 10) | |
798 | elapsed_time = htobe16(elapsed_usec / USEC_PER_MSEC / 10); | |
799 | else | |
800 | elapsed_time = 0xffff; | |
801 | ||
2c1ab8ca | 802 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ELAPSED_TIME, |
346e13a2 PF |
803 | sizeof(elapsed_time), &elapsed_time); |
804 | if (r < 0) | |
805 | return r; | |
806 | ||
e7d5fe17 AD |
807 | ORDERED_HASHMAP_FOREACH(j, client->extra_options, i) { |
808 | r = dhcp6_option_append(&opt, &optlen, j->option, j->length, j->data); | |
809 | if (r < 0) | |
810 | return r; | |
811 | } | |
812 | ||
a9aff361 PF |
813 | r = dhcp6_network_send_udp_socket(client->fd, &all_servers, message, |
814 | len - optlen); | |
815 | if (r < 0) | |
816 | return r; | |
817 | ||
818 | log_dhcp6_client(client, "Sent %s", | |
819 | dhcp6_message_type_to_string(message->type)); | |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
4b558378 | 824 | static int client_timeout_t2(sd_event_source *s, uint64_t usec, void *userdata) { |
a34b57c0 PF |
825 | sd_dhcp6_client *client = userdata; |
826 | ||
a1140666 LP |
827 | assert(s); |
828 | assert(client); | |
829 | assert(client->lease); | |
a34b57c0 | 830 | |
c9393e8c | 831 | (void) event_source_disable(client->timeout_t2); |
a34b57c0 PF |
832 | |
833 | log_dhcp6_client(client, "Timeout T2"); | |
834 | ||
3dc34fcc PF |
835 | client_start(client, DHCP6_STATE_REBIND); |
836 | ||
a34b57c0 PF |
837 | return 0; |
838 | } | |
839 | ||
4b558378 | 840 | static int client_timeout_t1(sd_event_source *s, uint64_t usec, void *userdata) { |
a34b57c0 PF |
841 | sd_dhcp6_client *client = userdata; |
842 | ||
a1140666 LP |
843 | assert(s); |
844 | assert(client); | |
845 | assert(client->lease); | |
a34b57c0 | 846 | |
c9393e8c | 847 | (void) event_source_disable(client->timeout_t1); |
a34b57c0 PF |
848 | |
849 | log_dhcp6_client(client, "Timeout T1"); | |
850 | ||
3dc34fcc PF |
851 | client_start(client, DHCP6_STATE_RENEW); |
852 | ||
a34b57c0 PF |
853 | return 0; |
854 | } | |
855 | ||
4b558378 | 856 | static int client_timeout_resend_expire(sd_event_source *s, uint64_t usec, void *userdata) { |
d1b0afe3 | 857 | sd_dhcp6_client *client = userdata; |
3dc34fcc PF |
858 | DHCP6_CLIENT_DONT_DESTROY(client); |
859 | enum DHCP6State state; | |
d1b0afe3 PF |
860 | |
861 | assert(s); | |
862 | assert(client); | |
863 | assert(client->event); | |
864 | ||
3dc34fcc PF |
865 | state = client->state; |
866 | ||
10c9ce61 | 867 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE); |
d1b0afe3 | 868 | |
3dc34fcc PF |
869 | /* RFC 3315, section 18.1.4., says that "...the client may choose to |
870 | use a Solicit message to locate a new DHCP server..." */ | |
871 | if (state == DHCP6_STATE_REBIND) | |
872 | client_start(client, DHCP6_STATE_SOLICITATION); | |
873 | ||
d1b0afe3 PF |
874 | return 0; |
875 | } | |
876 | ||
877 | static usec_t client_timeout_compute_random(usec_t val) { | |
9de8a425 | 878 | return val - (random_u32() % USEC_PER_SEC) * val / 10 / USEC_PER_SEC; |
d1b0afe3 PF |
879 | } |
880 | ||
4b558378 | 881 | static int client_timeout_resend(sd_event_source *s, uint64_t usec, void *userdata) { |
d1b0afe3 PF |
882 | int r = 0; |
883 | sd_dhcp6_client *client = userdata; | |
4b4923e6 | 884 | usec_t time_now, init_retransmit_time = 0, max_retransmit_time = 0; |
5e913450 | 885 | usec_t max_retransmit_duration = 0; |
513a6fa8 | 886 | uint8_t max_retransmit_count = 0; |
d1b0afe3 PF |
887 | char time_string[FORMAT_TIMESPAN_MAX]; |
888 | ||
889 | assert(s); | |
890 | assert(client); | |
891 | assert(client->event); | |
892 | ||
c9393e8c | 893 | (void) event_source_disable(client->timeout_resend); |
d1b0afe3 PF |
894 | |
895 | switch (client->state) { | |
bbfa43ca PF |
896 | case DHCP6_STATE_INFORMATION_REQUEST: |
897 | init_retransmit_time = DHCP6_INF_TIMEOUT; | |
898 | max_retransmit_time = DHCP6_INF_MAX_RT; | |
899 | ||
900 | break; | |
901 | ||
d1b0afe3 | 902 | case DHCP6_STATE_SOLICITATION: |
7246333c PF |
903 | |
904 | if (client->retransmit_count && client->lease) { | |
905 | client_start(client, DHCP6_STATE_REQUEST); | |
906 | return 0; | |
907 | } | |
908 | ||
d1b0afe3 PF |
909 | init_retransmit_time = DHCP6_SOL_TIMEOUT; |
910 | max_retransmit_time = DHCP6_SOL_MAX_RT; | |
d1b0afe3 PF |
911 | |
912 | break; | |
913 | ||
7246333c PF |
914 | case DHCP6_STATE_REQUEST: |
915 | init_retransmit_time = DHCP6_REQ_TIMEOUT; | |
916 | max_retransmit_time = DHCP6_REQ_MAX_RT; | |
917 | max_retransmit_count = DHCP6_REQ_MAX_RC; | |
7246333c PF |
918 | |
919 | break; | |
920 | ||
3dc34fcc PF |
921 | case DHCP6_STATE_RENEW: |
922 | init_retransmit_time = DHCP6_REN_TIMEOUT; | |
923 | max_retransmit_time = DHCP6_REN_MAX_RT; | |
3dc34fcc PF |
924 | |
925 | /* RFC 3315, section 18.1.3. says max retransmit duration will | |
926 | be the remaining time until T2. Instead of setting MRD, | |
927 | wait for T2 to trigger with the same end result */ | |
3dc34fcc PF |
928 | |
929 | break; | |
930 | ||
931 | case DHCP6_STATE_REBIND: | |
932 | init_retransmit_time = DHCP6_REB_TIMEOUT; | |
933 | max_retransmit_time = DHCP6_REB_MAX_RT; | |
3dc34fcc | 934 | |
c9393e8c | 935 | if (event_source_is_enabled(client->timeout_resend_expire) <= 0) { |
3ae01632 YW |
936 | uint32_t expire = 0; |
937 | ||
938 | r = dhcp6_lease_ia_rebind_expire(&client->lease->ia, &expire); | |
3dc34fcc PF |
939 | if (r < 0) { |
940 | client_stop(client, r); | |
941 | return 0; | |
942 | } | |
943 | max_retransmit_duration = expire * USEC_PER_SEC; | |
944 | } | |
945 | ||
946 | break; | |
947 | ||
d1b0afe3 | 948 | case DHCP6_STATE_STOPPED: |
a34b57c0 | 949 | case DHCP6_STATE_BOUND: |
d1b0afe3 PF |
950 | return 0; |
951 | } | |
952 | ||
3ae01632 | 953 | if (max_retransmit_count > 0 && |
d1b0afe3 | 954 | client->retransmit_count >= max_retransmit_count) { |
10c9ce61 | 955 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RETRANS_MAX); |
d1b0afe3 PF |
956 | return 0; |
957 | } | |
958 | ||
fa94c34b | 959 | r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now); |
d1b0afe3 PF |
960 | if (r < 0) |
961 | goto error; | |
962 | ||
346e13a2 PF |
963 | r = client_send_message(client, time_now); |
964 | if (r >= 0) | |
965 | client->retransmit_count++; | |
966 | ||
3ae01632 | 967 | if (client->retransmit_time == 0) { |
d1b0afe3 PF |
968 | client->retransmit_time = |
969 | client_timeout_compute_random(init_retransmit_time); | |
a9aff361 PF |
970 | |
971 | if (client->state == DHCP6_STATE_SOLICITATION) | |
972 | client->retransmit_time += init_retransmit_time / 10; | |
973 | ||
d1b0afe3 | 974 | } else { |
3ae01632 | 975 | if (max_retransmit_time > 0 && |
d1b0afe3 PF |
976 | client->retransmit_time > max_retransmit_time / 2) |
977 | client->retransmit_time = client_timeout_compute_random(max_retransmit_time); | |
978 | else | |
979 | client->retransmit_time += client_timeout_compute_random(client->retransmit_time); | |
980 | } | |
981 | ||
982 | log_dhcp6_client(client, "Next retransmission in %s", | |
ed19c567 | 983 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, client->retransmit_time, USEC_PER_SEC)); |
d1b0afe3 | 984 | |
c9393e8c YW |
985 | r = event_reset_time(client->event, &client->timeout_resend, |
986 | clock_boottime_or_monotonic(), | |
987 | time_now + client->retransmit_time, 10 * USEC_PER_MSEC, | |
988 | client_timeout_resend, client, | |
989 | client->event_priority, "dhcp6-resend-timer", true); | |
d1b0afe3 PF |
990 | if (r < 0) |
991 | goto error; | |
992 | ||
3ae01632 | 993 | if (max_retransmit_duration > 0 && event_source_is_enabled(client->timeout_resend_expire) <= 0) { |
d1b0afe3 PF |
994 | |
995 | log_dhcp6_client(client, "Max retransmission duration %"PRIu64" secs", | |
996 | max_retransmit_duration / USEC_PER_SEC); | |
997 | ||
c9393e8c YW |
998 | r = event_reset_time(client->event, &client->timeout_resend_expire, |
999 | clock_boottime_or_monotonic(), | |
1000 | time_now + max_retransmit_duration, USEC_PER_SEC, | |
1001 | client_timeout_resend_expire, client, | |
1002 | client->event_priority, "dhcp6-resend-expire-timer", true); | |
9021bb9f TG |
1003 | if (r < 0) |
1004 | goto error; | |
d1b0afe3 PF |
1005 | } |
1006 | ||
1007 | error: | |
1008 | if (r < 0) | |
1009 | client_stop(client, r); | |
1010 | ||
1011 | return 0; | |
1012 | } | |
1013 | ||
f12abb48 | 1014 | static int client_ensure_iaid(sd_dhcp6_client *client) { |
cfb5b380 | 1015 | int r; |
6d13616b | 1016 | uint32_t iaid; |
f12abb48 PF |
1017 | |
1018 | assert(client); | |
1019 | ||
8217ed5e | 1020 | if (client->iaid_set) |
f12abb48 PF |
1021 | return 0; |
1022 | ||
6d13616b | 1023 | r = dhcp_identifier_set_iaid(client->ifindex, client->mac_addr, client->mac_addr_len, true, &iaid); |
cfb5b380 TG |
1024 | if (r < 0) |
1025 | return r; | |
f12abb48 | 1026 | |
69b43997 PF |
1027 | client->ia_na.ia_na.id = iaid; |
1028 | client->ia_pd.ia_pd.id = iaid; | |
8217ed5e | 1029 | client->iaid_set = true; |
69b43997 | 1030 | |
f12abb48 PF |
1031 | return 0; |
1032 | } | |
1033 | ||
4b558378 ZJS |
1034 | static int client_parse_message( |
1035 | sd_dhcp6_client *client, | |
1036 | DHCP6Message *message, | |
1037 | size_t len, | |
1038 | sd_dhcp6_lease *lease) { | |
da07cf35 | 1039 | |
5c95a913 | 1040 | uint16_t ia_na_status = 0, ia_pd_status = 0; |
da07cf35 | 1041 | uint32_t lt_t1 = ~0, lt_t2 = ~0; |
5c95a913 | 1042 | usec_t irt = IRT_DEFAULT; |
da07cf35 | 1043 | bool clientid = false; |
3bc424a3 | 1044 | size_t pos = 0; |
631bbe71 | 1045 | int r; |
631bbe71 | 1046 | |
a1140666 LP |
1047 | assert(client); |
1048 | assert(message); | |
1049 | assert(len >= sizeof(DHCP6Message)); | |
1050 | assert(lease); | |
1051 | ||
44481a8b ZJS |
1052 | len -= sizeof(DHCP6Message); |
1053 | ||
3bc424a3 | 1054 | while (pos < len) { |
da07cf35 | 1055 | DHCP6Option *option = (DHCP6Option *) &message->options[pos]; |
c6b4f32a | 1056 | uint16_t optcode, optlen; |
3bc424a3 | 1057 | be32_t iaid_lease; |
5c95a913 | 1058 | int status; |
da07cf35 | 1059 | uint8_t *optval; |
3bc424a3 | 1060 | |
da07cf35 | 1061 | if (len < pos + offsetof(DHCP6Option, data)) |
3bc424a3 PF |
1062 | return -ENOBUFS; |
1063 | ||
1064 | optcode = be16toh(option->code); | |
1065 | optlen = be16toh(option->len); | |
1066 | optval = option->data; | |
1067 | ||
da07cf35 YW |
1068 | if (len < pos + offsetof(DHCP6Option, data) + optlen) |
1069 | return -ENOBUFS; | |
1070 | ||
631bbe71 | 1071 | switch (optcode) { |
2c1ab8ca | 1072 | case SD_DHCP6_OPTION_CLIENTID: |
631bbe71 PF |
1073 | if (clientid) { |
1074 | log_dhcp6_client(client, "%s contains multiple clientids", | |
1075 | dhcp6_message_type_to_string(message->type)); | |
1076 | return -EINVAL; | |
1077 | } | |
1078 | ||
66eac120 | 1079 | if (optlen != client->duid_len || |
631bbe71 PF |
1080 | memcmp(&client->duid, optval, optlen) != 0) { |
1081 | log_dhcp6_client(client, "%s DUID does not match", | |
1082 | dhcp6_message_type_to_string(message->type)); | |
1083 | ||
1084 | return -EINVAL; | |
1085 | } | |
1086 | clientid = true; | |
1087 | ||
1088 | break; | |
1089 | ||
2c1ab8ca | 1090 | case SD_DHCP6_OPTION_SERVERID: |
99f1d3fc ZJS |
1091 | r = dhcp6_lease_get_serverid(lease, NULL, NULL); |
1092 | if (r >= 0) { | |
631bbe71 PF |
1093 | log_dhcp6_client(client, "%s contains multiple serverids", |
1094 | dhcp6_message_type_to_string(message->type)); | |
1095 | return -EINVAL; | |
1096 | } | |
1097 | ||
1098 | r = dhcp6_lease_set_serverid(lease, optval, optlen); | |
1099 | if (r < 0) | |
1100 | return r; | |
1101 | ||
1102 | break; | |
1103 | ||
2c1ab8ca | 1104 | case SD_DHCP6_OPTION_PREFERENCE: |
631bbe71 PF |
1105 | if (optlen != 1) |
1106 | return -EINVAL; | |
1107 | ||
3bc424a3 | 1108 | r = dhcp6_lease_set_preference(lease, optval[0]); |
631bbe71 PF |
1109 | if (r < 0) |
1110 | return r; | |
1111 | ||
1112 | break; | |
1113 | ||
2c1ab8ca | 1114 | case SD_DHCP6_OPTION_STATUS_CODE: |
91c43f39 YW |
1115 | status = dhcp6_option_parse_status(option, optlen + sizeof(DHCP6Option)); |
1116 | if (status < 0) | |
1117 | return status; | |
1118 | ||
1119 | if (status > 0) { | |
631bbe71 PF |
1120 | log_dhcp6_client(client, "%s Status %s", |
1121 | dhcp6_message_type_to_string(message->type), | |
1122 | dhcp6_message_status_to_string(status)); | |
c6b4f32a | 1123 | |
631bbe71 PF |
1124 | return -EINVAL; |
1125 | } | |
1126 | ||
1127 | break; | |
1128 | ||
2c1ab8ca | 1129 | case SD_DHCP6_OPTION_IA_NA: |
bbfa43ca PF |
1130 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { |
1131 | log_dhcp6_client(client, "Information request ignoring IA NA option"); | |
1132 | ||
1133 | break; | |
1134 | } | |
1135 | ||
5c95a913 | 1136 | r = dhcp6_option_parse_ia(option, &lease->ia, &ia_na_status); |
631bbe71 PF |
1137 | if (r < 0 && r != -ENOMSG) |
1138 | return r; | |
1139 | ||
5c95a913 SS |
1140 | if (ia_na_status == DHCP6_STATUS_NO_ADDRS_AVAIL) { |
1141 | pos += offsetof(DHCP6Option, data) + optlen; | |
1142 | continue; | |
1143 | } | |
1144 | ||
631bbe71 PF |
1145 | r = dhcp6_lease_get_iaid(lease, &iaid_lease); |
1146 | if (r < 0) | |
1147 | return r; | |
1148 | ||
e0026dcb | 1149 | if (client->ia_na.ia_na.id != iaid_lease) { |
dce6563f PF |
1150 | log_dhcp6_client(client, "%s has wrong IAID for IA NA", |
1151 | dhcp6_message_type_to_string(message->type)); | |
1152 | return -EINVAL; | |
1153 | } | |
1154 | ||
b47fb949 PF |
1155 | if (lease->ia.addresses) { |
1156 | lt_t1 = MIN(lt_t1, be32toh(lease->ia.ia_na.lifetime_t1)); | |
1157 | lt_t2 = MIN(lt_t2, be32toh(lease->ia.ia_na.lifetime_t1)); | |
1158 | } | |
1159 | ||
dce6563f PF |
1160 | break; |
1161 | ||
1162 | case SD_DHCP6_OPTION_IA_PD: | |
1163 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { | |
1164 | log_dhcp6_client(client, "Information request ignoring IA PD option"); | |
1165 | ||
1166 | break; | |
1167 | } | |
1168 | ||
5c95a913 | 1169 | r = dhcp6_option_parse_ia(option, &lease->pd, &ia_pd_status); |
dce6563f PF |
1170 | if (r < 0 && r != -ENOMSG) |
1171 | return r; | |
1172 | ||
5c95a913 SS |
1173 | if (ia_pd_status == DHCP6_STATUS_NO_PREFIX_AVAIL) { |
1174 | pos += offsetof(DHCP6Option, data) + optlen; | |
1175 | continue; | |
1176 | } | |
1177 | ||
49228c75 | 1178 | r = dhcp6_lease_get_pd_iaid(lease, &iaid_lease); |
dce6563f PF |
1179 | if (r < 0) |
1180 | return r; | |
1181 | ||
1182 | if (client->ia_pd.ia_pd.id != iaid_lease) { | |
1183 | log_dhcp6_client(client, "%s has wrong IAID for IA PD", | |
631bbe71 PF |
1184 | dhcp6_message_type_to_string(message->type)); |
1185 | return -EINVAL; | |
1186 | } | |
1187 | ||
b47fb949 PF |
1188 | if (lease->pd.addresses) { |
1189 | lt_t1 = MIN(lt_t1, be32toh(lease->pd.ia_pd.lifetime_t1)); | |
1190 | lt_t2 = MIN(lt_t2, be32toh(lease->pd.ia_pd.lifetime_t2)); | |
1191 | } | |
1192 | ||
631bbe71 | 1193 | break; |
ed6ee219 | 1194 | |
2c1ab8ca | 1195 | case SD_DHCP6_OPTION_RAPID_COMMIT: |
ed6ee219 PF |
1196 | r = dhcp6_lease_set_rapid_commit(lease); |
1197 | if (r < 0) | |
1198 | return r; | |
1199 | ||
1200 | break; | |
7bd8e95d | 1201 | |
2c1ab8ca | 1202 | case SD_DHCP6_OPTION_DNS_SERVERS: |
7bd8e95d PF |
1203 | r = dhcp6_lease_set_dns(lease, optval, optlen); |
1204 | if (r < 0) | |
1205 | return r; | |
1206 | ||
1207 | break; | |
5da1b97f | 1208 | |
2c1ab8ca | 1209 | case SD_DHCP6_OPTION_DOMAIN_LIST: |
5da1b97f PF |
1210 | r = dhcp6_lease_set_domains(lease, optval, optlen); |
1211 | if (r < 0) | |
1212 | return r; | |
1213 | ||
1214 | break; | |
1215 | ||
2c1ab8ca | 1216 | case SD_DHCP6_OPTION_NTP_SERVER: |
6599680e PF |
1217 | r = dhcp6_lease_set_ntp(lease, optval, optlen); |
1218 | if (r < 0) | |
1219 | return r; | |
1220 | ||
1221 | break; | |
41e4615d | 1222 | |
2c1ab8ca | 1223 | case SD_DHCP6_OPTION_SNTP_SERVERS: |
41e4615d PF |
1224 | r = dhcp6_lease_set_sntp(lease, optval, optlen); |
1225 | if (r < 0) | |
1226 | return r; | |
1227 | ||
1228 | break; | |
fcb51238 YW |
1229 | |
1230 | case SD_DHCP6_OPTION_INFORMATION_REFRESH_TIME: | |
6ffe71d0 YW |
1231 | if (optlen != 4) |
1232 | return -EINVAL; | |
1233 | ||
0eb5e6d3 | 1234 | irt = unaligned_read_be32((be32_t *) optval) * USEC_PER_SEC; |
fcb51238 | 1235 | break; |
631bbe71 | 1236 | } |
6599680e | 1237 | |
23976cb9 | 1238 | pos += offsetof(DHCP6Option, data) + optlen; |
631bbe71 PF |
1239 | } |
1240 | ||
5c95a913 SS |
1241 | if (ia_na_status > 0 && ia_pd_status > 0) { |
1242 | log_dhcp6_client(client, "No IA_PD prefix or IA_NA address received. Ignoring."); | |
1243 | return -EINVAL; | |
1244 | } | |
1245 | ||
1eeddba4 | 1246 | if (!clientid) { |
631bbe71 PF |
1247 | log_dhcp6_client(client, "%s has incomplete options", |
1248 | dhcp6_message_type_to_string(message->type)); | |
1249 | return -EINVAL; | |
1250 | } | |
1251 | ||
bbfa43ca | 1252 | if (client->state != DHCP6_STATE_INFORMATION_REQUEST) { |
99f1d3fc ZJS |
1253 | r = dhcp6_lease_get_serverid(lease, NULL, NULL); |
1254 | if (r < 0) { | |
bbfa43ca PF |
1255 | log_dhcp6_client(client, "%s has no server id", |
1256 | dhcp6_message_type_to_string(message->type)); | |
99f1d3fc ZJS |
1257 | return -EINVAL; |
1258 | } | |
b47fb949 | 1259 | |
99f1d3fc ZJS |
1260 | } else { |
1261 | if (lease->ia.addresses) { | |
1262 | lease->ia.ia_na.lifetime_t1 = htobe32(lt_t1); | |
1263 | lease->ia.ia_na.lifetime_t2 = htobe32(lt_t2); | |
1264 | } | |
b47fb949 | 1265 | |
99f1d3fc ZJS |
1266 | if (lease->pd.addresses) { |
1267 | lease->pd.ia_pd.lifetime_t1 = htobe32(lt_t1); | |
1268 | lease->pd.ia_pd.lifetime_t2 = htobe32(lt_t2); | |
1269 | } | |
bbfa43ca | 1270 | } |
631bbe71 | 1271 | |
fcb51238 YW |
1272 | client->information_refresh_time_usec = MAX(irt, IRT_MINIMUM); |
1273 | ||
21a9905c | 1274 | return 0; |
631bbe71 PF |
1275 | } |
1276 | ||
0ae0e5cd | 1277 | static int client_receive_reply(sd_dhcp6_client *client, DHCP6Message *reply, size_t len) { |
4afd3348 | 1278 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
ed6ee219 | 1279 | bool rapid_commit; |
a1140666 LP |
1280 | int r; |
1281 | ||
1282 | assert(client); | |
1283 | assert(reply); | |
a34b57c0 PF |
1284 | |
1285 | if (reply->type != DHCP6_REPLY) | |
ed6ee219 | 1286 | return 0; |
a34b57c0 PF |
1287 | |
1288 | r = dhcp6_lease_new(&lease); | |
1289 | if (r < 0) | |
1290 | return -ENOMEM; | |
1291 | ||
1292 | r = client_parse_message(client, reply, len, lease); | |
1293 | if (r < 0) | |
1294 | return r; | |
1295 | ||
ed6ee219 PF |
1296 | if (client->state == DHCP6_STATE_SOLICITATION) { |
1297 | r = dhcp6_lease_get_rapid_commit(lease, &rapid_commit); | |
1298 | if (r < 0) | |
1299 | return r; | |
1300 | ||
1301 | if (!rapid_commit) | |
1302 | return 0; | |
1303 | } | |
1304 | ||
431a4bc8 YW |
1305 | sd_dhcp6_lease_unref(client->lease); |
1306 | client->lease = TAKE_PTR(lease); | |
a34b57c0 PF |
1307 | |
1308 | return DHCP6_STATE_BOUND; | |
1309 | } | |
1310 | ||
0ae0e5cd | 1311 | static int client_receive_advertise(sd_dhcp6_client *client, DHCP6Message *advertise, size_t len) { |
4afd3348 | 1312 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
631bbe71 | 1313 | uint8_t pref_advertise = 0, pref_lease = 0; |
a1140666 | 1314 | int r; |
631bbe71 PF |
1315 | |
1316 | if (advertise->type != DHCP6_ADVERTISE) | |
ed6ee219 | 1317 | return 0; |
631bbe71 PF |
1318 | |
1319 | r = dhcp6_lease_new(&lease); | |
1320 | if (r < 0) | |
1321 | return r; | |
1322 | ||
1323 | r = client_parse_message(client, advertise, len, lease); | |
1324 | if (r < 0) | |
1325 | return r; | |
1326 | ||
1327 | r = dhcp6_lease_get_preference(lease, &pref_advertise); | |
1328 | if (r < 0) | |
1329 | return r; | |
1330 | ||
1331 | r = dhcp6_lease_get_preference(client->lease, &pref_lease); | |
bbfa43ca PF |
1332 | |
1333 | if (r < 0 || pref_advertise > pref_lease) { | |
431a4bc8 YW |
1334 | sd_dhcp6_lease_unref(client->lease); |
1335 | client->lease = TAKE_PTR(lease); | |
631bbe71 PF |
1336 | r = 0; |
1337 | } | |
1338 | ||
7246333c PF |
1339 | if (pref_advertise == 255 || client->retransmit_count > 1) |
1340 | r = DHCP6_STATE_REQUEST; | |
1341 | ||
631bbe71 PF |
1342 | return r; |
1343 | } | |
1344 | ||
004845d1 LP |
1345 | static int client_receive_message( |
1346 | sd_event_source *s, | |
1347 | int fd, uint32_t | |
1348 | revents, | |
1349 | void *userdata) { | |
1350 | ||
631bbe71 | 1351 | sd_dhcp6_client *client = userdata; |
3f0c075f | 1352 | DHCP6_CLIENT_DONT_DESTROY(client); |
0d43d2fc | 1353 | _cleanup_free_ DHCP6Message *message = NULL; |
4edc2c9b LP |
1354 | ssize_t buflen, len; |
1355 | int r = 0; | |
631bbe71 PF |
1356 | |
1357 | assert(s); | |
1358 | assert(client); | |
1359 | assert(client->event); | |
1360 | ||
4edc2c9b | 1361 | buflen = next_datagram_size_fd(fd); |
22a3fd2d BG |
1362 | if (buflen == -ENETDOWN) { |
1363 | /* the link is down. Don't return an error or the I/O event | |
1364 | source will be disconnected and we won't be able to receive | |
1365 | packets again when the link comes back. */ | |
1366 | return 0; | |
1367 | } | |
4edc2c9b LP |
1368 | if (buflen < 0) |
1369 | return buflen; | |
631bbe71 | 1370 | |
0d43d2fc | 1371 | message = malloc(buflen); |
631bbe71 PF |
1372 | if (!message) |
1373 | return -ENOMEM; | |
1374 | ||
cf447cb6 | 1375 | len = recv(fd, message, buflen, 0); |
0d43d2fc | 1376 | if (len < 0) { |
22a3fd2d BG |
1377 | /* see comment above for why we shouldn't error out on ENETDOWN. */ |
1378 | if (IN_SET(errno, EAGAIN, EINTR, ENETDOWN)) | |
0d43d2fc TG |
1379 | return 0; |
1380 | ||
bd9a7221 | 1381 | return log_dhcp6_client_errno(client, errno, "Could not receive message from UDP socket: %m"); |
0d43d2fc | 1382 | |
004845d1 LP |
1383 | } |
1384 | if ((size_t) len < sizeof(DHCP6Message)) { | |
1385 | log_dhcp6_client(client, "Too small to be DHCP6 message: ignoring"); | |
631bbe71 | 1386 | return 0; |
004845d1 | 1387 | } |
631bbe71 PF |
1388 | |
1389 | switch(message->type) { | |
1390 | case DHCP6_SOLICIT: | |
1391 | case DHCP6_REQUEST: | |
1392 | case DHCP6_CONFIRM: | |
1393 | case DHCP6_RENEW: | |
1394 | case DHCP6_REBIND: | |
1395 | case DHCP6_RELEASE: | |
1396 | case DHCP6_DECLINE: | |
1397 | case DHCP6_INFORMATION_REQUEST: | |
1398 | case DHCP6_RELAY_FORW: | |
1399 | case DHCP6_RELAY_REPL: | |
1400 | return 0; | |
1401 | ||
1402 | case DHCP6_ADVERTISE: | |
1403 | case DHCP6_REPLY: | |
1404 | case DHCP6_RECONFIGURE: | |
1405 | break; | |
1406 | ||
1407 | default: | |
bd9a7221 | 1408 | log_dhcp6_client(client, "Unknown message type %d", message->type); |
631bbe71 PF |
1409 | return 0; |
1410 | } | |
1411 | ||
1412 | if (client->transaction_id != (message->transaction_id & | |
1413 | htobe32(0x00ffffff))) | |
1414 | return 0; | |
1415 | ||
1416 | switch (client->state) { | |
bbfa43ca PF |
1417 | case DHCP6_STATE_INFORMATION_REQUEST: |
1418 | r = client_receive_reply(client, message, len); | |
1419 | if (r < 0) | |
1420 | return 0; | |
1421 | ||
10c9ce61 | 1422 | client_notify(client, SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST); |
bbfa43ca PF |
1423 | |
1424 | client_start(client, DHCP6_STATE_STOPPED); | |
1425 | ||
1426 | break; | |
1427 | ||
631bbe71 PF |
1428 | case DHCP6_STATE_SOLICITATION: |
1429 | r = client_receive_advertise(client, message, len); | |
1430 | ||
ed6ee219 | 1431 | if (r == DHCP6_STATE_REQUEST) { |
7246333c PF |
1432 | client_start(client, r); |
1433 | ||
ed6ee219 PF |
1434 | break; |
1435 | } | |
631bbe71 | 1436 | |
4831981d | 1437 | _fallthrough_; /* for Soliciation Rapid Commit option check */ |
7246333c | 1438 | case DHCP6_STATE_REQUEST: |
3dc34fcc PF |
1439 | case DHCP6_STATE_RENEW: |
1440 | case DHCP6_STATE_REBIND: | |
1441 | ||
a34b57c0 PF |
1442 | r = client_receive_reply(client, message, len); |
1443 | if (r < 0) | |
1444 | return 0; | |
1445 | ||
1446 | if (r == DHCP6_STATE_BOUND) { | |
1447 | ||
1448 | r = client_start(client, DHCP6_STATE_BOUND); | |
1449 | if (r < 0) { | |
1450 | client_stop(client, r); | |
1451 | return 0; | |
1452 | } | |
1453 | ||
10c9ce61 | 1454 | client_notify(client, SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE); |
a34b57c0 PF |
1455 | } |
1456 | ||
1457 | break; | |
1458 | ||
1459 | case DHCP6_STATE_BOUND: | |
1460 | ||
1461 | break; | |
1462 | ||
631bbe71 | 1463 | case DHCP6_STATE_STOPPED: |
631bbe71 PF |
1464 | return 0; |
1465 | } | |
1466 | ||
712fdfd6 YW |
1467 | log_dhcp6_client(client, "Recv %s", |
1468 | dhcp6_message_type_to_string(message->type)); | |
631bbe71 | 1469 | |
a9aff361 PF |
1470 | return 0; |
1471 | } | |
1472 | ||
134ebaa4 PF |
1473 | static int client_get_lifetime(sd_dhcp6_client *client, uint32_t *lifetime_t1, |
1474 | uint32_t *lifetime_t2) { | |
1475 | assert_return(client, -EINVAL); | |
1476 | assert_return(client->lease, -EINVAL); | |
1477 | ||
1478 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA) && client->lease->ia.addresses) { | |
1479 | *lifetime_t1 = be32toh(client->lease->ia.ia_na.lifetime_t1); | |
1480 | *lifetime_t2 = be32toh(client->lease->ia.ia_na.lifetime_t2); | |
1481 | ||
1482 | return 0; | |
1483 | } | |
1484 | ||
1485 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD) && client->lease->pd.addresses) { | |
1486 | *lifetime_t1 = be32toh(client->lease->pd.ia_pd.lifetime_t1); | |
1487 | *lifetime_t2 = be32toh(client->lease->pd.ia_pd.lifetime_t2); | |
1488 | ||
1489 | return 0; | |
1490 | } | |
1491 | ||
1492 | return -ENOMSG; | |
1493 | } | |
1494 | ||
0ae0e5cd | 1495 | static int client_start(sd_dhcp6_client *client, enum DHCP6State state) { |
f12abb48 | 1496 | int r; |
a34b57c0 PF |
1497 | usec_t timeout, time_now; |
1498 | char time_string[FORMAT_TIMESPAN_MAX]; | |
134ebaa4 | 1499 | uint32_t lifetime_t1, lifetime_t2; |
f12abb48 PF |
1500 | |
1501 | assert_return(client, -EINVAL); | |
1502 | assert_return(client->event, -EINVAL); | |
2f8e7633 | 1503 | assert_return(client->ifindex > 0, -EINVAL); |
c3e2adea | 1504 | assert_return(client->state != state, -EINVAL); |
f12abb48 | 1505 | |
c9393e8c YW |
1506 | (void) event_source_disable(client->timeout_resend_expire); |
1507 | (void) event_source_disable(client->timeout_resend); | |
c3e2adea PF |
1508 | client->retransmit_time = 0; |
1509 | client->retransmit_count = 0; | |
f12abb48 | 1510 | |
38a03f06 LP |
1511 | r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now); |
1512 | if (r < 0) | |
1513 | return r; | |
346e13a2 | 1514 | |
7ac6c26a PF |
1515 | if (!client->receive_message) { |
1516 | r = sd_event_add_io(client->event, &client->receive_message, | |
1517 | client->fd, EPOLLIN, client_receive_message, | |
1518 | client); | |
1519 | if (r < 0) | |
1520 | goto error; | |
1521 | ||
1522 | r = sd_event_source_set_priority(client->receive_message, | |
1523 | client->event_priority); | |
1524 | if (r < 0) | |
1525 | goto error; | |
1526 | ||
1527 | r = sd_event_source_set_description(client->receive_message, | |
1528 | "dhcp6-receive-message"); | |
1529 | if (r < 0) | |
1530 | goto error; | |
1531 | } | |
1532 | ||
c3e2adea PF |
1533 | switch (state) { |
1534 | case DHCP6_STATE_STOPPED: | |
bbfa43ca PF |
1535 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { |
1536 | client->state = DHCP6_STATE_STOPPED; | |
a9aff361 | 1537 | |
bbfa43ca PF |
1538 | return 0; |
1539 | } | |
9021bb9f | 1540 | |
4831981d | 1541 | _fallthrough_; |
bbfa43ca | 1542 | case DHCP6_STATE_SOLICITATION: |
c3e2adea PF |
1543 | client->state = DHCP6_STATE_SOLICITATION; |
1544 | ||
7246333c PF |
1545 | break; |
1546 | ||
bbfa43ca | 1547 | case DHCP6_STATE_INFORMATION_REQUEST: |
7246333c | 1548 | case DHCP6_STATE_REQUEST: |
3dc34fcc PF |
1549 | case DHCP6_STATE_RENEW: |
1550 | case DHCP6_STATE_REBIND: | |
a34b57c0 | 1551 | |
7246333c PF |
1552 | client->state = state; |
1553 | ||
c3e2adea | 1554 | break; |
a34b57c0 PF |
1555 | |
1556 | case DHCP6_STATE_BOUND: | |
1557 | ||
134ebaa4 PF |
1558 | r = client_get_lifetime(client, &lifetime_t1, &lifetime_t2); |
1559 | if (r < 0) | |
1560 | goto error; | |
a34b57c0 | 1561 | |
134ebaa4 | 1562 | if (lifetime_t1 == 0xffffffff || lifetime_t2 == 0xffffffff) { |
bd9a7221 | 1563 | log_dhcp6_client(client, "Infinite T1 0x%08x or T2 0x%08x", |
134ebaa4 | 1564 | lifetime_t1, lifetime_t2); |
a34b57c0 PF |
1565 | |
1566 | return 0; | |
1567 | } | |
1568 | ||
134ebaa4 | 1569 | timeout = client_timeout_compute_random(lifetime_t1 * USEC_PER_SEC); |
a34b57c0 PF |
1570 | |
1571 | log_dhcp6_client(client, "T1 expires in %s", | |
ed19c567 | 1572 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC)); |
a34b57c0 | 1573 | |
c9393e8c YW |
1574 | r = event_reset_time(client->event, &client->timeout_t1, |
1575 | clock_boottime_or_monotonic(), | |
1576 | time_now + timeout, 10 * USEC_PER_SEC, | |
1577 | client_timeout_t1, client, | |
1578 | client->event_priority, "dhcp6-t1-timeout", true); | |
9021bb9f | 1579 | if (r < 0) |
7ac6c26a | 1580 | goto error; |
9021bb9f | 1581 | |
134ebaa4 | 1582 | timeout = client_timeout_compute_random(lifetime_t2 * USEC_PER_SEC); |
a34b57c0 PF |
1583 | |
1584 | log_dhcp6_client(client, "T2 expires in %s", | |
ed19c567 | 1585 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC)); |
a34b57c0 | 1586 | |
c9393e8c YW |
1587 | r = event_reset_time(client->event, &client->timeout_t2, |
1588 | clock_boottime_or_monotonic(), | |
1589 | time_now + timeout, 10 * USEC_PER_SEC, | |
1590 | client_timeout_t2, client, | |
1591 | client->event_priority, "dhcp6-t2-timeout", true); | |
9021bb9f | 1592 | if (r < 0) |
7ac6c26a | 1593 | goto error; |
9021bb9f | 1594 | |
3dc34fcc PF |
1595 | client->state = state; |
1596 | ||
a34b57c0 | 1597 | return 0; |
c3e2adea | 1598 | } |
a9aff361 | 1599 | |
c3e2adea | 1600 | client->transaction_id = random_u32() & htobe32(0x00ffffff); |
346e13a2 | 1601 | client->transaction_start = time_now; |
d1b0afe3 | 1602 | |
c9393e8c YW |
1603 | r = event_reset_time(client->event, &client->timeout_resend, |
1604 | clock_boottime_or_monotonic(), | |
1605 | 0, 0, | |
1606 | client_timeout_resend, client, | |
1607 | client->event_priority, "dhcp6-resend-timeout", true); | |
9021bb9f | 1608 | if (r < 0) |
7ac6c26a | 1609 | goto error; |
9021bb9f | 1610 | |
f12abb48 | 1611 | return 0; |
7ac6c26a PF |
1612 | |
1613 | error: | |
1614 | client_reset(client); | |
1615 | return r; | |
f12abb48 PF |
1616 | } |
1617 | ||
0ae0e5cd | 1618 | int sd_dhcp6_client_stop(sd_dhcp6_client *client) { |
f667c150 TG |
1619 | assert_return(client, -EINVAL); |
1620 | ||
10c9ce61 | 1621 | client_stop(client, SD_DHCP6_CLIENT_EVENT_STOP); |
139b011a | 1622 | |
7ac6c26a PF |
1623 | client->fd = safe_close(client->fd); |
1624 | ||
139b011a PF |
1625 | return 0; |
1626 | } | |
1627 | ||
f667c150 TG |
1628 | int sd_dhcp6_client_is_running(sd_dhcp6_client *client) { |
1629 | assert_return(client, -EINVAL); | |
1630 | ||
1631 | return client->state != DHCP6_STATE_STOPPED; | |
1632 | } | |
1633 | ||
0ae0e5cd | 1634 | int sd_dhcp6_client_start(sd_dhcp6_client *client) { |
bbfa43ca | 1635 | enum DHCP6State state = DHCP6_STATE_SOLICITATION; |
2f8e7633 | 1636 | int r = 0; |
139b011a PF |
1637 | |
1638 | assert_return(client, -EINVAL); | |
1639 | assert_return(client->event, -EINVAL); | |
2f8e7633 | 1640 | assert_return(client->ifindex > 0, -EINVAL); |
c601ebf7 | 1641 | assert_return(in_addr_is_link_local(AF_INET6, (const union in_addr_union *) &client->local_address) > 0, -EINVAL); |
139b011a | 1642 | |
d7c9c21f | 1643 | if (!IN_SET(client->state, DHCP6_STATE_STOPPED)) |
63348d13 | 1644 | return -EBUSY; |
d7c9c21f | 1645 | |
f311a62b PF |
1646 | if (!client->information_request && !client->request) |
1647 | return -EINVAL; | |
1648 | ||
c806ffb9 | 1649 | r = client_reset(client); |
f12abb48 PF |
1650 | if (r < 0) |
1651 | return r; | |
1652 | ||
bbfa43ca PF |
1653 | r = client_ensure_iaid(client); |
1654 | if (r < 0) | |
1655 | return r; | |
1656 | ||
cc22955c TH |
1657 | r = client_ensure_duid(client); |
1658 | if (r < 0) | |
1659 | return r; | |
1660 | ||
10a0f27b PF |
1661 | if (client->fd < 0) { |
1662 | r = dhcp6_network_bind_udp_socket(client->ifindex, &client->local_address); | |
1663 | if (r < 0) { | |
1664 | _cleanup_free_ char *p = NULL; | |
1665 | ||
1666 | (void) in_addr_to_string(AF_INET6, (const union in_addr_union*) &client->local_address, &p); | |
1667 | return log_dhcp6_client_errno(client, r, | |
1668 | "Failed to bind to UDP socket at address %s: %m", strna(p)); | |
1669 | } | |
bd9a7221 | 1670 | |
10a0f27b | 1671 | client->fd = r; |
bd9a7221 | 1672 | } |
bbfa43ca | 1673 | |
fcb51238 YW |
1674 | if (client->information_request) { |
1675 | usec_t t = now(CLOCK_MONOTONIC); | |
1676 | ||
1677 | if (t < usec_add(client->information_request_time_usec, client->information_refresh_time_usec)) | |
1678 | return 0; | |
1679 | ||
1680 | client->information_request_time_usec = t; | |
bbfa43ca | 1681 | state = DHCP6_STATE_INFORMATION_REQUEST; |
fcb51238 | 1682 | } |
bbfa43ca PF |
1683 | |
1684 | log_dhcp6_client(client, "Started in %s mode", | |
483d099e ZJS |
1685 | client->information_request? "Information request": |
1686 | "Managed"); | |
bbfa43ca PF |
1687 | |
1688 | return client_start(client, state); | |
139b011a PF |
1689 | } |
1690 | ||
32d20645 | 1691 | int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event, int64_t priority) { |
139b011a PF |
1692 | int r; |
1693 | ||
1694 | assert_return(client, -EINVAL); | |
1695 | assert_return(!client->event, -EBUSY); | |
1696 | ||
1697 | if (event) | |
1698 | client->event = sd_event_ref(event); | |
1699 | else { | |
1700 | r = sd_event_default(&client->event); | |
1701 | if (r < 0) | |
1702 | return 0; | |
1703 | } | |
1704 | ||
1705 | client->event_priority = priority; | |
1706 | ||
1707 | return 0; | |
1708 | } | |
1709 | ||
1710 | int sd_dhcp6_client_detach_event(sd_dhcp6_client *client) { | |
1711 | assert_return(client, -EINVAL); | |
1712 | ||
1713 | client->event = sd_event_unref(client->event); | |
1714 | ||
1715 | return 0; | |
1716 | } | |
1717 | ||
1718 | sd_event *sd_dhcp6_client_get_event(sd_dhcp6_client *client) { | |
a1140666 | 1719 | assert_return(client, NULL); |
139b011a PF |
1720 | |
1721 | return client->event; | |
1722 | } | |
1723 | ||
8301aa0b YW |
1724 | static sd_dhcp6_client *dhcp6_client_free(sd_dhcp6_client *client) { |
1725 | assert(client); | |
139b011a | 1726 | |
c9393e8c YW |
1727 | client->timeout_resend = sd_event_source_unref(client->timeout_resend); |
1728 | client->timeout_resend_expire = sd_event_source_unref(client->timeout_resend_expire); | |
1729 | client->timeout_t1 = sd_event_source_unref(client->timeout_t1); | |
1730 | client->timeout_t2 = sd_event_source_unref(client->timeout_t2); | |
1731 | ||
3733eec3 LP |
1732 | client_reset(client); |
1733 | ||
10a0f27b PF |
1734 | client->fd = safe_close(client->fd); |
1735 | ||
3733eec3 | 1736 | sd_dhcp6_client_detach_event(client); |
3733eec3 LP |
1737 | |
1738 | free(client->req_opts); | |
8006aa32 | 1739 | free(client->fqdn); |
de8d6e55 | 1740 | free(client->mudurl); |
33923925 | 1741 | |
e7d5fe17 | 1742 | ordered_hashmap_free(client->extra_options); |
33923925 | 1743 | strv_free(client->user_class); |
73c8ced7 | 1744 | strv_free(client->vendor_class); |
33923925 | 1745 | |
6b430fdb | 1746 | return mfree(client); |
139b011a PF |
1747 | } |
1748 | ||
8301aa0b YW |
1749 | DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp6_client, sd_dhcp6_client, dhcp6_client_free); |
1750 | ||
0ae0e5cd | 1751 | int sd_dhcp6_client_new(sd_dhcp6_client **ret) { |
4afd3348 | 1752 | _cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL; |
8b8ecac8 | 1753 | _cleanup_free_ be16_t *req_opts = NULL; |
da6fe470 | 1754 | size_t t; |
139b011a PF |
1755 | |
1756 | assert_return(ret, -EINVAL); | |
1757 | ||
8b8ecac8 YW |
1758 | req_opts = new(be16_t, ELEMENTSOF(default_req_opts)); |
1759 | if (!req_opts) | |
139b011a PF |
1760 | return -ENOMEM; |
1761 | ||
8b8ecac8 YW |
1762 | for (t = 0; t < ELEMENTSOF(default_req_opts); t++) |
1763 | req_opts[t] = htobe16(default_req_opts[t]); | |
c806ffb9 | 1764 | |
8b8ecac8 YW |
1765 | client = new(sd_dhcp6_client, 1); |
1766 | if (!client) | |
da6fe470 PF |
1767 | return -ENOMEM; |
1768 | ||
8b8ecac8 YW |
1769 | *client = (sd_dhcp6_client) { |
1770 | .n_ref = 1, | |
1771 | .ia_na.type = SD_DHCP6_OPTION_IA_NA, | |
1772 | .ia_pd.type = SD_DHCP6_OPTION_IA_PD, | |
1773 | .ifindex = -1, | |
1774 | .request = DHCP6_REQUEST_IA_NA, | |
1775 | .fd = -1, | |
1776 | .req_opts_len = ELEMENTSOF(default_req_opts), | |
2805536b SS |
1777 | .hint_pd_prefix.iapdprefix.lifetime_preferred = (be32_t) -1, |
1778 | .hint_pd_prefix.iapdprefix.lifetime_valid = (be32_t) -1, | |
8b8ecac8 YW |
1779 | .req_opts = TAKE_PTR(req_opts), |
1780 | }; | |
da6fe470 | 1781 | |
1cc6c93a | 1782 | *ret = TAKE_PTR(client); |
139b011a PF |
1783 | |
1784 | return 0; | |
1785 | } |