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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; |
139b011a PF |
84 | }; |
85 | ||
da6fe470 | 86 | static const uint16_t default_req_opts[] = { |
2c1ab8ca BG |
87 | SD_DHCP6_OPTION_DNS_SERVERS, |
88 | SD_DHCP6_OPTION_DOMAIN_LIST, | |
89 | SD_DHCP6_OPTION_NTP_SERVER, | |
90 | SD_DHCP6_OPTION_SNTP_SERVERS, | |
da6fe470 PF |
91 | }; |
92 | ||
a9aff361 PF |
93 | const char * dhcp6_message_type_table[_DHCP6_MESSAGE_MAX] = { |
94 | [DHCP6_SOLICIT] = "SOLICIT", | |
95 | [DHCP6_ADVERTISE] = "ADVERTISE", | |
96 | [DHCP6_REQUEST] = "REQUEST", | |
97 | [DHCP6_CONFIRM] = "CONFIRM", | |
98 | [DHCP6_RENEW] = "RENEW", | |
99 | [DHCP6_REBIND] = "REBIND", | |
100 | [DHCP6_REPLY] = "REPLY", | |
101 | [DHCP6_RELEASE] = "RELEASE", | |
102 | [DHCP6_DECLINE] = "DECLINE", | |
103 | [DHCP6_RECONFIGURE] = "RECONFIGURE", | |
104 | [DHCP6_INFORMATION_REQUEST] = "INFORMATION-REQUEST", | |
105 | [DHCP6_RELAY_FORW] = "RELAY-FORW", | |
106 | [DHCP6_RELAY_REPL] = "RELAY-REPL", | |
107 | }; | |
108 | ||
109 | DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_type, int); | |
110 | ||
631bbe71 | 111 | const char * dhcp6_message_status_table[_DHCP6_STATUS_MAX] = { |
76643fed SS |
112 | [DHCP6_STATUS_SUCCESS] = "Success", |
113 | [DHCP6_STATUS_UNSPEC_FAIL] = "Unspecified failure", | |
114 | [DHCP6_STATUS_NO_ADDRS_AVAIL] = "No addresses available", | |
115 | [DHCP6_STATUS_NO_BINDING] = "Binding unavailable", | |
116 | [DHCP6_STATUS_NOT_ON_LINK] = "Not on link", | |
117 | [DHCP6_STATUS_USE_MULTICAST] = "Use multicast", | |
118 | [DHCP6_STATUS_NO_PREFIX_AVAIL] = "No prefix available", | |
119 | [DHCP6_STATUS_UNKNOWN_QUERY_TYPE] = "Unknown query type", | |
120 | [DHCP6_STATUS_MALFORMED_QUERY] = "Malformed query", | |
121 | [DHCP6_STATUS_NOT_CONFIGURED] = "Not configured", | |
122 | [DHCP6_STATUS_NOT_ALLOWED] = "Not allowed", | |
123 | [DHCP6_STATUS_QUERY_TERMINATED] = "Query terminated", | |
124 | [DHCP6_STATUS_DATA_MISSING] = "Data missing", | |
125 | [DHCP6_STATUS_CATCHUP_COMPLETE] = "Catch up complete", | |
126 | [DHCP6_STATUS_NOT_SUPPORTED] = "Not supported", | |
127 | [DHCP6_STATUS_TLS_CONNECTION_REFUSED] = "TLS connection refused", | |
128 | [DHCP6_STATUS_ADDRESS_IN_USE] = "Address in use", | |
129 | [DHCP6_STATUS_CONFIGURATION_CONFLICT] = "Configuration conflict", | |
130 | [DHCP6_STATUS_MISSING_BINDING_INFORMATION] = "Missing binding information", | |
131 | [DHCP6_STATUS_OUTDATED_BINDING_INFORMATION] = "Outdated binding information", | |
132 | [DHCP6_STATUS_SERVER_SHUTTING_DOWN] = "Server shutting down", | |
133 | [DHCP6_STATUS_DNS_UPDATE_NOT_SUPPORTED] = "DNS update not supported", | |
134 | [DHCP6_STATUS_EXCESSIVE_TIME_SKEW] = "Excessive time skew", | |
631bbe71 PF |
135 | }; |
136 | ||
137 | DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_status, int); | |
138 | ||
3f0c075f | 139 | #define DHCP6_CLIENT_DONT_DESTROY(client) \ |
4afd3348 | 140 | _cleanup_(sd_dhcp6_client_unrefp) _unused_ sd_dhcp6_client *_dont_destroy_##client = sd_dhcp6_client_ref(client) |
3f0c075f | 141 | |
c3e2adea PF |
142 | static int client_start(sd_dhcp6_client *client, enum DHCP6State state); |
143 | ||
4b558378 ZJS |
144 | int sd_dhcp6_client_set_callback( |
145 | sd_dhcp6_client *client, | |
146 | sd_dhcp6_client_callback_t cb, | |
147 | void *userdata) { | |
45aa74c7 | 148 | |
139b011a PF |
149 | assert_return(client, -EINVAL); |
150 | ||
45aa74c7 | 151 | client->callback = cb; |
139b011a PF |
152 | client->userdata = userdata; |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
2f8e7633 | 157 | int sd_dhcp6_client_set_ifindex(sd_dhcp6_client *client, int ifindex) { |
139b011a | 158 | |
2f8e7633 LP |
159 | assert_return(client, -EINVAL); |
160 | assert_return(ifindex >= -1, -EINVAL); | |
d7c9c21f PF |
161 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
162 | ||
2f8e7633 | 163 | client->ifindex = ifindex; |
139b011a PF |
164 | return 0; |
165 | } | |
166 | ||
4b558378 ZJS |
167 | int sd_dhcp6_client_set_local_address( |
168 | sd_dhcp6_client *client, | |
169 | const struct in6_addr *local_address) { | |
170 | ||
c601ebf7 TG |
171 | assert_return(client, -EINVAL); |
172 | assert_return(local_address, -EINVAL); | |
173 | assert_return(in_addr_is_link_local(AF_INET6, (const union in_addr_union *) local_address) > 0, -EINVAL); | |
174 | ||
175 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); | |
176 | ||
177 | client->local_address = *local_address; | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
0ae0e5cd LP |
182 | int sd_dhcp6_client_set_mac( |
183 | sd_dhcp6_client *client, | |
184 | const uint8_t *addr, size_t addr_len, | |
185 | uint16_t arp_type) { | |
186 | ||
139b011a | 187 | assert_return(client, -EINVAL); |
76253e73 DW |
188 | assert_return(addr, -EINVAL); |
189 | assert_return(addr_len > 0 && addr_len <= MAX_MAC_ADDR_LEN, -EINVAL); | |
190 | assert_return(arp_type > 0, -EINVAL); | |
191 | ||
d7c9c21f PF |
192 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
193 | ||
76253e73 DW |
194 | if (arp_type == ARPHRD_ETHER) |
195 | assert_return(addr_len == ETH_ALEN, -EINVAL); | |
196 | else if (arp_type == ARPHRD_INFINIBAND) | |
197 | assert_return(addr_len == INFINIBAND_ALEN, -EINVAL); | |
139b011a | 198 | else |
76253e73 DW |
199 | return -EINVAL; |
200 | ||
201 | if (client->mac_addr_len == addr_len && | |
202 | memcmp(&client->mac_addr, addr, addr_len) == 0) | |
203 | return 0; | |
204 | ||
205 | memcpy(&client->mac_addr, addr, addr_len); | |
206 | client->mac_addr_len = addr_len; | |
207 | client->arp_type = arp_type; | |
139b011a PF |
208 | |
209 | return 0; | |
210 | } | |
211 | ||
2805536b SS |
212 | int sd_dhcp6_client_set_prefix_delegation_hint( |
213 | sd_dhcp6_client *client, | |
214 | uint8_t prefixlen, | |
215 | const struct in6_addr *pd_address) { | |
216 | ||
217 | assert_return(client, -EINVAL); | |
218 | assert_return(pd_address, -EINVAL); | |
219 | ||
220 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); | |
221 | ||
222 | client->hint_pd_prefix.iapdprefix.address = *pd_address; | |
223 | client->hint_pd_prefix.iapdprefix.prefixlen = prefixlen; | |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
0ae0e5cd | 228 | static int client_ensure_duid(sd_dhcp6_client *client) { |
cc22955c TH |
229 | if (client->duid_len != 0) |
230 | return 0; | |
0ae0e5cd | 231 | |
cc22955c TH |
232 | return dhcp_identifier_set_duid_en(&client->duid, &client->duid_len); |
233 | } | |
234 | ||
d7df2fd3 ZJS |
235 | /** |
236 | * Sets DUID. If duid is non-null, the DUID is set to duid_type + duid | |
237 | * without further modification. Otherwise, if duid_type is supported, DUID | |
238 | * is set based on that type. Otherwise, an error is returned. | |
239 | */ | |
7e90a499 | 240 | static int dhcp6_client_set_duid_internal( |
4b558378 ZJS |
241 | sd_dhcp6_client *client, |
242 | uint16_t duid_type, | |
f7a92d1a | 243 | const void *duid, |
7e90a499 YW |
244 | size_t duid_len, |
245 | usec_t llt_time) { | |
413708d1 | 246 | int r; |
27eba50e | 247 | |
66eac120 | 248 | assert_return(client, -EINVAL); |
d7df2fd3 | 249 | assert_return(duid_len == 0 || duid != NULL, -EINVAL); |
afec4539 | 250 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
c83321e6 | 251 | |
d7df2fd3 | 252 | if (duid != NULL) { |
ab4a88bc TH |
253 | r = dhcp_validate_duid_len(duid_type, duid_len, true); |
254 | if (r < 0) { | |
255 | r = dhcp_validate_duid_len(duid_type, duid_len, false); | |
256 | if (r < 0) | |
a339859f | 257 | return log_dhcp6_client_errno(client, r, "Failed to validate length of DUID: %m"); |
01bcea49 LP |
258 | |
259 | log_dhcp6_client(client, "Using DUID of type %u of incorrect length, proceeding.", duid_type); | |
ab4a88bc | 260 | } |
d7df2fd3 | 261 | |
413708d1 VK |
262 | client->duid.type = htobe16(duid_type); |
263 | memcpy(&client->duid.raw.data, duid, duid_len); | |
d7df2fd3 | 264 | client->duid_len = sizeof(client->duid.type) + duid_len; |
d7df2fd3 | 265 | } else |
27eba50e | 266 | switch (duid_type) { |
335f80a6 | 267 | case DUID_TYPE_LLT: |
339697f0 | 268 | if (client->mac_addr_len == 0) |
a339859f | 269 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EOPNOTSUPP), "Failed to set DUID-LLT, MAC address is not set."); |
335f80a6 | 270 | |
53253d9c | 271 | r = dhcp_identifier_set_duid_llt(&client->duid, llt_time, client->mac_addr, client->mac_addr_len, client->arp_type, &client->duid_len); |
335f80a6 | 272 | if (r < 0) |
a339859f | 273 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-LLT: %m"); |
335f80a6 | 274 | break; |
27eba50e YW |
275 | case DUID_TYPE_EN: |
276 | r = dhcp_identifier_set_duid_en(&client->duid, &client->duid_len); | |
277 | if (r < 0) | |
a339859f | 278 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-EN: %m"); |
27eba50e | 279 | break; |
335f80a6 | 280 | case DUID_TYPE_LL: |
339697f0 | 281 | if (client->mac_addr_len == 0) |
a339859f | 282 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EOPNOTSUPP), "Failed to set DUID-LL, MAC address is not set."); |
335f80a6 YW |
283 | |
284 | r = dhcp_identifier_set_duid_ll(&client->duid, client->mac_addr, client->mac_addr_len, client->arp_type, &client->duid_len); | |
285 | if (r < 0) | |
a339859f | 286 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-LL: %m"); |
335f80a6 | 287 | break; |
27eba50e YW |
288 | case DUID_TYPE_UUID: |
289 | r = dhcp_identifier_set_duid_uuid(&client->duid, &client->duid_len); | |
290 | if (r < 0) | |
a339859f | 291 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-UUID: %m"); |
27eba50e YW |
292 | break; |
293 | default: | |
a339859f | 294 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EINVAL), "Invalid DUID type"); |
27eba50e | 295 | } |
fe4b2156 | 296 | |
413708d1 VK |
297 | return 0; |
298 | } | |
299 | ||
7e90a499 YW |
300 | int sd_dhcp6_client_set_duid( |
301 | sd_dhcp6_client *client, | |
302 | uint16_t duid_type, | |
303 | const void *duid, | |
304 | size_t duid_len) { | |
305 | return dhcp6_client_set_duid_internal(client, duid_type, duid, duid_len, 0); | |
306 | } | |
307 | ||
308 | int sd_dhcp6_client_set_duid_llt( | |
309 | sd_dhcp6_client *client, | |
310 | usec_t llt_time) { | |
311 | return dhcp6_client_set_duid_internal(client, DUID_TYPE_LLT, NULL, 0, llt_time); | |
312 | } | |
313 | ||
413708d1 VK |
314 | int sd_dhcp6_client_set_iaid(sd_dhcp6_client *client, uint32_t iaid) { |
315 | assert_return(client, -EINVAL); | |
316 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); | |
317 | ||
e0026dcb | 318 | client->ia_na.ia_na.id = htobe32(iaid); |
dce6563f | 319 | client->ia_pd.ia_pd.id = htobe32(iaid); |
8217ed5e | 320 | client->iaid_set = true; |
66eac120 DW |
321 | |
322 | return 0; | |
323 | } | |
324 | ||
8006aa32 SA |
325 | int sd_dhcp6_client_set_fqdn( |
326 | sd_dhcp6_client *client, | |
327 | const char *fqdn) { | |
328 | ||
329 | assert_return(client, -EINVAL); | |
330 | ||
331 | /* Make sure FQDN qualifies as DNS and as Linux hostname */ | |
332 | if (fqdn && | |
333 | !(hostname_is_valid(fqdn, false) && dns_name_is_valid(fqdn) > 0)) | |
334 | return -EINVAL; | |
335 | ||
336 | return free_and_strdup(&client->fqdn, fqdn); | |
337 | } | |
338 | ||
04c01369 | 339 | int sd_dhcp6_client_set_information_request(sd_dhcp6_client *client, int enabled) { |
bbfa43ca | 340 | assert_return(client, -EINVAL); |
d7c9c21f PF |
341 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
342 | ||
bbfa43ca PF |
343 | client->information_request = enabled; |
344 | ||
345 | return 0; | |
346 | } | |
347 | ||
04c01369 | 348 | int sd_dhcp6_client_get_information_request(sd_dhcp6_client *client, int *enabled) { |
bbfa43ca PF |
349 | assert_return(client, -EINVAL); |
350 | assert_return(enabled, -EINVAL); | |
351 | ||
352 | *enabled = client->information_request; | |
353 | ||
354 | return 0; | |
355 | } | |
356 | ||
0ae0e5cd | 357 | int sd_dhcp6_client_set_request_option(sd_dhcp6_client *client, uint16_t option) { |
da6fe470 PF |
358 | size_t t; |
359 | ||
360 | assert_return(client, -EINVAL); | |
361 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
362 | ||
2b20ca65 | 363 | if (option <= 0 || option >= 255) |
da6fe470 | 364 | return -EINVAL; |
da6fe470 PF |
365 | |
366 | for (t = 0; t < client->req_opts_len; t++) | |
367 | if (client->req_opts[t] == htobe16(option)) | |
368 | return -EEXIST; | |
369 | ||
370 | if (!GREEDY_REALLOC(client->req_opts, client->req_opts_allocated, | |
371 | client->req_opts_len + 1)) | |
372 | return -ENOMEM; | |
373 | ||
374 | client->req_opts[client->req_opts_len++] = htobe16(option); | |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
feb7d7a2 | 379 | int sd_dhcp6_client_set_request_mud_url(sd_dhcp6_client *client, const char *mudurl) { |
de8d6e55 SS |
380 | |
381 | assert_return(client, -EINVAL); | |
382 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
383 | assert_return(mudurl, -EINVAL); | |
ed0d1b2e | 384 | assert_return(strlen(mudurl) <= 255, -EINVAL); |
de8d6e55 SS |
385 | assert_return(http_url_is_valid(mudurl), -EINVAL); |
386 | ||
387 | return free_and_strdup(&client->mudurl, mudurl); | |
388 | } | |
389 | ||
33923925 SS |
390 | int sd_dhcp6_client_set_request_user_class(sd_dhcp6_client *client, char **user_class) { |
391 | _cleanup_strv_free_ char **s = NULL; | |
392 | char **p; | |
393 | ||
394 | assert_return(client, -EINVAL); | |
395 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
73c8ced7 | 396 | |
33923925 SS |
397 | assert_return(user_class, -EINVAL); |
398 | ||
399 | STRV_FOREACH(p, user_class) | |
400 | if (strlen(*p) > UINT16_MAX) | |
401 | return -ENAMETOOLONG; | |
402 | ||
403 | s = strv_copy((char **) user_class); | |
404 | if (!s) | |
405 | return -ENOMEM; | |
406 | ||
407 | client->user_class = TAKE_PTR(s); | |
408 | ||
409 | return 0; | |
410 | } | |
411 | ||
73c8ced7 SS |
412 | int sd_dhcp6_client_set_request_vendor_class(sd_dhcp6_client *client, char **vendor_class) { |
413 | _cleanup_strv_free_ char **s = NULL; | |
414 | char **p; | |
415 | ||
416 | assert_return(client, -EINVAL); | |
417 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
418 | assert_return(vendor_class, -EINVAL); | |
419 | ||
420 | STRV_FOREACH(p, vendor_class) | |
421 | if (strlen(*p) > UINT8_MAX) | |
422 | return -ENAMETOOLONG; | |
423 | ||
424 | s = strv_copy(vendor_class); | |
425 | if (!s) | |
426 | return -ENOMEM; | |
427 | ||
428 | client->vendor_class = TAKE_PTR(s); | |
429 | ||
430 | return 0; | |
431 | } | |
432 | ||
d8c51121 PF |
433 | int sd_dhcp6_client_get_prefix_delegation(sd_dhcp6_client *client, int *delegation) { |
434 | assert_return(client, -EINVAL); | |
435 | assert_return(delegation, -EINVAL); | |
436 | ||
f311a62b | 437 | *delegation = FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD); |
d8c51121 PF |
438 | |
439 | return 0; | |
440 | } | |
441 | ||
442 | int sd_dhcp6_client_set_prefix_delegation(sd_dhcp6_client *client, int delegation) { | |
7c3de8f8 PF |
443 | assert_return(client, -EINVAL); |
444 | ||
f311a62b PF |
445 | SET_FLAG(client->request, DHCP6_REQUEST_IA_PD, delegation); |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
450 | int sd_dhcp6_client_get_address_request(sd_dhcp6_client *client, int *request) { | |
451 | assert_return(client, -EINVAL); | |
452 | assert_return(request, -EINVAL); | |
453 | ||
454 | *request = FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA); | |
455 | ||
456 | return 0; | |
457 | } | |
458 | ||
459 | int sd_dhcp6_client_set_address_request(sd_dhcp6_client *client, int request) { | |
460 | assert_return(client, -EINVAL); | |
461 | ||
462 | SET_FLAG(client->request, DHCP6_REQUEST_IA_NA, request); | |
7c3de8f8 PF |
463 | |
464 | return 0; | |
465 | } | |
466 | ||
b62f9008 | 467 | int sd_dhcp6_client_set_transaction_id(sd_dhcp6_client *client, uint32_t transaction_id) { |
d89a400e EV |
468 | assert_return(client, -EINVAL); |
469 | ||
470 | client->transaction_id = transaction_id; | |
471 | ||
472 | return 0; | |
473 | } | |
474 | ||
ea3b3a75 PF |
475 | int sd_dhcp6_client_get_lease(sd_dhcp6_client *client, sd_dhcp6_lease **ret) { |
476 | assert_return(client, -EINVAL); | |
ea3b3a75 PF |
477 | |
478 | if (!client->lease) | |
479 | return -ENOMSG; | |
480 | ||
3098562c TG |
481 | if (ret) |
482 | *ret = client->lease; | |
ea3b3a75 PF |
483 | |
484 | return 0; | |
485 | } | |
486 | ||
e7d5fe17 AD |
487 | int sd_dhcp6_client_add_option(sd_dhcp6_client *client, sd_dhcp6_option *v) { |
488 | int r; | |
489 | ||
490 | assert_return(client, -EINVAL); | |
491 | assert_return(v, -EINVAL); | |
492 | ||
493 | r = ordered_hashmap_ensure_allocated(&client->extra_options, &dhcp6_option_hash_ops); | |
494 | if (r < 0) | |
495 | return r; | |
496 | ||
497 | r = ordered_hashmap_put(client->extra_options, UINT_TO_PTR(v->option), v); | |
498 | if (r < 0) | |
499 | return r; | |
500 | ||
501 | sd_dhcp6_option_ref(v); | |
502 | return 0; | |
503 | } | |
504 | ||
3f0c075f | 505 | static void client_notify(sd_dhcp6_client *client, int event) { |
45aa74c7 LP |
506 | assert(client); |
507 | ||
508 | if (client->callback) | |
509 | client->callback(client, event, client->userdata); | |
139b011a PF |
510 | } |
511 | ||
f8908727 | 512 | static int client_reset(sd_dhcp6_client *client) { |
a1140666 | 513 | assert(client); |
f8908727 | 514 | |
431a4bc8 | 515 | client->lease = sd_dhcp6_lease_unref(client->lease); |
4e3e6679 | 516 | |
a9aff361 PF |
517 | client->receive_message = |
518 | sd_event_source_unref(client->receive_message); | |
519 | ||
c3e2adea | 520 | client->transaction_id = 0; |
346e13a2 | 521 | client->transaction_start = 0; |
a9aff361 | 522 | |
d1b0afe3 PF |
523 | client->retransmit_time = 0; |
524 | client->retransmit_count = 0; | |
d1b0afe3 | 525 | |
c9393e8c YW |
526 | (void) event_source_disable(client->timeout_resend); |
527 | (void) event_source_disable(client->timeout_resend_expire); | |
528 | (void) event_source_disable(client->timeout_t1); | |
529 | (void) event_source_disable(client->timeout_t2); | |
213e759a | 530 | |
139b011a PF |
531 | client->state = DHCP6_STATE_STOPPED; |
532 | ||
533 | return 0; | |
534 | } | |
535 | ||
3f0c075f PF |
536 | static void client_stop(sd_dhcp6_client *client, int error) { |
537 | DHCP6_CLIENT_DONT_DESTROY(client); | |
139b011a | 538 | |
3f0c075f | 539 | assert(client); |
139b011a | 540 | |
3f0c075f PF |
541 | client_notify(client, error); |
542 | ||
543 | client_reset(client); | |
139b011a PF |
544 | } |
545 | ||
346e13a2 | 546 | static int client_send_message(sd_dhcp6_client *client, usec_t time_now) { |
a9aff361 PF |
547 | _cleanup_free_ DHCP6Message *message = NULL; |
548 | struct in6_addr all_servers = | |
549 | IN6ADDR_ALL_DHCP6_RELAY_AGENTS_AND_SERVERS_INIT; | |
e7d5fe17 | 550 | struct sd_dhcp6_option *j; |
a9aff361 | 551 | size_t len, optlen = 512; |
e7d5fe17 | 552 | Iterator i; |
a9aff361 PF |
553 | uint8_t *opt; |
554 | int r; | |
346e13a2 PF |
555 | usec_t elapsed_usec; |
556 | be16_t elapsed_time; | |
a9aff361 | 557 | |
a1140666 LP |
558 | assert(client); |
559 | ||
a9aff361 PF |
560 | len = sizeof(DHCP6Message) + optlen; |
561 | ||
562 | message = malloc0(len); | |
563 | if (!message) | |
564 | return -ENOMEM; | |
565 | ||
566 | opt = (uint8_t *)(message + 1); | |
567 | ||
568 | message->transaction_id = client->transaction_id; | |
569 | ||
570 | switch(client->state) { | |
bbfa43ca PF |
571 | case DHCP6_STATE_INFORMATION_REQUEST: |
572 | message->type = DHCP6_INFORMATION_REQUEST; | |
573 | ||
de8d6e55 SS |
574 | if (client->mudurl) { |
575 | r = dhcp6_option_append(&opt, &optlen, | |
576 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
577 | client->mudurl); | |
578 | if (r < 0) | |
579 | return r; | |
580 | } | |
581 | ||
bbfa43ca PF |
582 | break; |
583 | ||
a9aff361 PF |
584 | case DHCP6_STATE_SOLICITATION: |
585 | message->type = DHCP6_SOLICIT; | |
586 | ||
ed6ee219 | 587 | r = dhcp6_option_append(&opt, &optlen, |
2c1ab8ca | 588 | SD_DHCP6_OPTION_RAPID_COMMIT, 0, NULL); |
926695f1 TA |
589 | if (r < 0) |
590 | return r; | |
ed6ee219 | 591 | |
f311a62b PF |
592 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
593 | r = dhcp6_option_append_ia(&opt, &optlen, | |
594 | &client->ia_na); | |
595 | if (r < 0) | |
596 | return r; | |
597 | } | |
a9aff361 | 598 | |
8006aa32 SA |
599 | if (client->fqdn) { |
600 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
601 | if (r < 0) | |
602 | return r; | |
603 | } | |
604 | ||
de8d6e55 SS |
605 | if (client->mudurl) { |
606 | r = dhcp6_option_append(&opt, &optlen, | |
607 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
608 | client->mudurl); | |
609 | if (r < 0) | |
610 | return r; | |
611 | } | |
612 | ||
33923925 SS |
613 | if (client->user_class) { |
614 | r = dhcp6_option_append_user_class(&opt, &optlen, client->user_class); | |
615 | if (r < 0) | |
616 | return r; | |
617 | } | |
618 | ||
73c8ced7 SS |
619 | if (client->vendor_class) { |
620 | r = dhcp6_option_append_vendor_class(&opt, &optlen, client->vendor_class); | |
621 | if (r < 0) | |
622 | return r; | |
623 | } | |
624 | ||
f311a62b | 625 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
2805536b | 626 | r = dhcp6_option_append_pd(opt, optlen, &client->ia_pd, &client->hint_pd_prefix); |
7c3de8f8 PF |
627 | if (r < 0) |
628 | return r; | |
629 | ||
630 | opt += r; | |
631 | optlen -= r; | |
632 | } | |
633 | ||
7246333c PF |
634 | break; |
635 | ||
636 | case DHCP6_STATE_REQUEST: | |
3dc34fcc PF |
637 | case DHCP6_STATE_RENEW: |
638 | ||
639 | if (client->state == DHCP6_STATE_REQUEST) | |
640 | message->type = DHCP6_REQUEST; | |
641 | else | |
642 | message->type = DHCP6_RENEW; | |
7246333c | 643 | |
2c1ab8ca | 644 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_SERVERID, |
7246333c PF |
645 | client->lease->serverid_len, |
646 | client->lease->serverid); | |
647 | if (r < 0) | |
648 | return r; | |
649 | ||
f311a62b PF |
650 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
651 | r = dhcp6_option_append_ia(&opt, &optlen, | |
652 | &client->lease->ia); | |
653 | if (r < 0) | |
654 | return r; | |
655 | } | |
a9aff361 | 656 | |
8006aa32 SA |
657 | if (client->fqdn) { |
658 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
659 | if (r < 0) | |
660 | return r; | |
661 | } | |
662 | ||
de8d6e55 SS |
663 | if (client->mudurl) { |
664 | r = dhcp6_option_append(&opt, &optlen, | |
665 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
666 | client->mudurl); | |
667 | if (r < 0) | |
668 | return r; | |
669 | } | |
670 | ||
33923925 SS |
671 | if (client->user_class) { |
672 | r = dhcp6_option_append_user_class(&opt, &optlen, client->user_class); | |
673 | if (r < 0) | |
674 | return r; | |
675 | } | |
676 | ||
73c8ced7 SS |
677 | if (client->vendor_class) { |
678 | r = dhcp6_option_append_vendor_class(&opt, &optlen, client->vendor_class); | |
679 | if (r < 0) | |
680 | return r; | |
681 | } | |
682 | ||
f311a62b | 683 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
2805536b | 684 | r = dhcp6_option_append_pd(opt, optlen, &client->lease->pd, NULL); |
7c3de8f8 PF |
685 | if (r < 0) |
686 | return r; | |
687 | ||
688 | opt += r; | |
689 | optlen -= r; | |
690 | } | |
691 | ||
a9aff361 PF |
692 | break; |
693 | ||
3dc34fcc PF |
694 | case DHCP6_STATE_REBIND: |
695 | message->type = DHCP6_REBIND; | |
696 | ||
f311a62b PF |
697 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
698 | r = dhcp6_option_append_ia(&opt, &optlen, &client->lease->ia); | |
699 | if (r < 0) | |
700 | return r; | |
701 | } | |
3dc34fcc | 702 | |
8006aa32 SA |
703 | if (client->fqdn) { |
704 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
705 | if (r < 0) | |
706 | return r; | |
707 | } | |
708 | ||
de8d6e55 SS |
709 | if (client->mudurl) { |
710 | r = dhcp6_option_append(&opt, &optlen, | |
711 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
712 | client->mudurl); | |
713 | if (r < 0) | |
714 | return r; | |
715 | } | |
716 | ||
33923925 SS |
717 | if (client->user_class) { |
718 | r = dhcp6_option_append_user_class(&opt, &optlen, client->user_class); | |
719 | if (r < 0) | |
720 | return r; | |
721 | } | |
722 | ||
73c8ced7 SS |
723 | if (client->vendor_class) { |
724 | r = dhcp6_option_append_vendor_class(&opt, &optlen, client->vendor_class); | |
725 | if (r < 0) | |
726 | return r; | |
727 | } | |
728 | ||
f311a62b | 729 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
2805536b | 730 | r = dhcp6_option_append_pd(opt, optlen, &client->lease->pd, NULL); |
7c3de8f8 PF |
731 | if (r < 0) |
732 | return r; | |
733 | ||
734 | opt += r; | |
735 | optlen -= r; | |
736 | } | |
737 | ||
3dc34fcc PF |
738 | break; |
739 | ||
a9aff361 | 740 | case DHCP6_STATE_STOPPED: |
a34b57c0 | 741 | case DHCP6_STATE_BOUND: |
a9aff361 PF |
742 | return -EINVAL; |
743 | } | |
744 | ||
2c1ab8ca | 745 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ORO, |
da6fe470 PF |
746 | client->req_opts_len * sizeof(be16_t), |
747 | client->req_opts); | |
748 | if (r < 0) | |
749 | return r; | |
750 | ||
ccd1fc2f | 751 | assert(client->duid_len); |
2c1ab8ca | 752 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_CLIENTID, |
66eac120 | 753 | client->duid_len, &client->duid); |
7246333c PF |
754 | if (r < 0) |
755 | return r; | |
756 | ||
346e13a2 PF |
757 | elapsed_usec = time_now - client->transaction_start; |
758 | if (elapsed_usec < 0xffff * USEC_PER_MSEC * 10) | |
759 | elapsed_time = htobe16(elapsed_usec / USEC_PER_MSEC / 10); | |
760 | else | |
761 | elapsed_time = 0xffff; | |
762 | ||
2c1ab8ca | 763 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ELAPSED_TIME, |
346e13a2 PF |
764 | sizeof(elapsed_time), &elapsed_time); |
765 | if (r < 0) | |
766 | return r; | |
767 | ||
e7d5fe17 AD |
768 | ORDERED_HASHMAP_FOREACH(j, client->extra_options, i) { |
769 | r = dhcp6_option_append(&opt, &optlen, j->option, j->length, j->data); | |
770 | if (r < 0) | |
771 | return r; | |
772 | } | |
773 | ||
a9aff361 PF |
774 | r = dhcp6_network_send_udp_socket(client->fd, &all_servers, message, |
775 | len - optlen); | |
776 | if (r < 0) | |
777 | return r; | |
778 | ||
779 | log_dhcp6_client(client, "Sent %s", | |
780 | dhcp6_message_type_to_string(message->type)); | |
781 | ||
782 | return 0; | |
783 | } | |
784 | ||
4b558378 | 785 | static int client_timeout_t2(sd_event_source *s, uint64_t usec, void *userdata) { |
a34b57c0 PF |
786 | sd_dhcp6_client *client = userdata; |
787 | ||
a1140666 LP |
788 | assert(s); |
789 | assert(client); | |
790 | assert(client->lease); | |
a34b57c0 | 791 | |
c9393e8c | 792 | (void) event_source_disable(client->timeout_t2); |
a34b57c0 PF |
793 | |
794 | log_dhcp6_client(client, "Timeout T2"); | |
795 | ||
3dc34fcc PF |
796 | client_start(client, DHCP6_STATE_REBIND); |
797 | ||
a34b57c0 PF |
798 | return 0; |
799 | } | |
800 | ||
4b558378 | 801 | static int client_timeout_t1(sd_event_source *s, uint64_t usec, void *userdata) { |
a34b57c0 PF |
802 | sd_dhcp6_client *client = userdata; |
803 | ||
a1140666 LP |
804 | assert(s); |
805 | assert(client); | |
806 | assert(client->lease); | |
a34b57c0 | 807 | |
c9393e8c | 808 | (void) event_source_disable(client->timeout_t1); |
a34b57c0 PF |
809 | |
810 | log_dhcp6_client(client, "Timeout T1"); | |
811 | ||
3dc34fcc PF |
812 | client_start(client, DHCP6_STATE_RENEW); |
813 | ||
a34b57c0 PF |
814 | return 0; |
815 | } | |
816 | ||
4b558378 | 817 | static int client_timeout_resend_expire(sd_event_source *s, uint64_t usec, void *userdata) { |
d1b0afe3 | 818 | sd_dhcp6_client *client = userdata; |
3dc34fcc PF |
819 | DHCP6_CLIENT_DONT_DESTROY(client); |
820 | enum DHCP6State state; | |
d1b0afe3 PF |
821 | |
822 | assert(s); | |
823 | assert(client); | |
824 | assert(client->event); | |
825 | ||
3dc34fcc PF |
826 | state = client->state; |
827 | ||
10c9ce61 | 828 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE); |
d1b0afe3 | 829 | |
3dc34fcc PF |
830 | /* RFC 3315, section 18.1.4., says that "...the client may choose to |
831 | use a Solicit message to locate a new DHCP server..." */ | |
832 | if (state == DHCP6_STATE_REBIND) | |
833 | client_start(client, DHCP6_STATE_SOLICITATION); | |
834 | ||
d1b0afe3 PF |
835 | return 0; |
836 | } | |
837 | ||
838 | static usec_t client_timeout_compute_random(usec_t val) { | |
9de8a425 | 839 | return val - (random_u32() % USEC_PER_SEC) * val / 10 / USEC_PER_SEC; |
d1b0afe3 PF |
840 | } |
841 | ||
4b558378 | 842 | static int client_timeout_resend(sd_event_source *s, uint64_t usec, void *userdata) { |
d1b0afe3 PF |
843 | int r = 0; |
844 | sd_dhcp6_client *client = userdata; | |
4b4923e6 | 845 | usec_t time_now, init_retransmit_time = 0, max_retransmit_time = 0; |
5e913450 | 846 | usec_t max_retransmit_duration = 0; |
513a6fa8 | 847 | uint8_t max_retransmit_count = 0; |
d1b0afe3 PF |
848 | char time_string[FORMAT_TIMESPAN_MAX]; |
849 | ||
850 | assert(s); | |
851 | assert(client); | |
852 | assert(client->event); | |
853 | ||
c9393e8c | 854 | (void) event_source_disable(client->timeout_resend); |
d1b0afe3 PF |
855 | |
856 | switch (client->state) { | |
bbfa43ca PF |
857 | case DHCP6_STATE_INFORMATION_REQUEST: |
858 | init_retransmit_time = DHCP6_INF_TIMEOUT; | |
859 | max_retransmit_time = DHCP6_INF_MAX_RT; | |
860 | ||
861 | break; | |
862 | ||
d1b0afe3 | 863 | case DHCP6_STATE_SOLICITATION: |
7246333c PF |
864 | |
865 | if (client->retransmit_count && client->lease) { | |
866 | client_start(client, DHCP6_STATE_REQUEST); | |
867 | return 0; | |
868 | } | |
869 | ||
d1b0afe3 PF |
870 | init_retransmit_time = DHCP6_SOL_TIMEOUT; |
871 | max_retransmit_time = DHCP6_SOL_MAX_RT; | |
d1b0afe3 PF |
872 | |
873 | break; | |
874 | ||
7246333c PF |
875 | case DHCP6_STATE_REQUEST: |
876 | init_retransmit_time = DHCP6_REQ_TIMEOUT; | |
877 | max_retransmit_time = DHCP6_REQ_MAX_RT; | |
878 | max_retransmit_count = DHCP6_REQ_MAX_RC; | |
7246333c PF |
879 | |
880 | break; | |
881 | ||
3dc34fcc PF |
882 | case DHCP6_STATE_RENEW: |
883 | init_retransmit_time = DHCP6_REN_TIMEOUT; | |
884 | max_retransmit_time = DHCP6_REN_MAX_RT; | |
3dc34fcc PF |
885 | |
886 | /* RFC 3315, section 18.1.3. says max retransmit duration will | |
887 | be the remaining time until T2. Instead of setting MRD, | |
888 | wait for T2 to trigger with the same end result */ | |
3dc34fcc PF |
889 | |
890 | break; | |
891 | ||
892 | case DHCP6_STATE_REBIND: | |
893 | init_retransmit_time = DHCP6_REB_TIMEOUT; | |
894 | max_retransmit_time = DHCP6_REB_MAX_RT; | |
3dc34fcc | 895 | |
c9393e8c | 896 | if (event_source_is_enabled(client->timeout_resend_expire) <= 0) { |
3ae01632 YW |
897 | uint32_t expire = 0; |
898 | ||
899 | r = dhcp6_lease_ia_rebind_expire(&client->lease->ia, &expire); | |
3dc34fcc PF |
900 | if (r < 0) { |
901 | client_stop(client, r); | |
902 | return 0; | |
903 | } | |
904 | max_retransmit_duration = expire * USEC_PER_SEC; | |
905 | } | |
906 | ||
907 | break; | |
908 | ||
d1b0afe3 | 909 | case DHCP6_STATE_STOPPED: |
a34b57c0 | 910 | case DHCP6_STATE_BOUND: |
d1b0afe3 PF |
911 | return 0; |
912 | } | |
913 | ||
3ae01632 | 914 | if (max_retransmit_count > 0 && |
d1b0afe3 | 915 | client->retransmit_count >= max_retransmit_count) { |
10c9ce61 | 916 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RETRANS_MAX); |
d1b0afe3 PF |
917 | return 0; |
918 | } | |
919 | ||
fa94c34b | 920 | r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now); |
d1b0afe3 PF |
921 | if (r < 0) |
922 | goto error; | |
923 | ||
346e13a2 PF |
924 | r = client_send_message(client, time_now); |
925 | if (r >= 0) | |
926 | client->retransmit_count++; | |
927 | ||
3ae01632 | 928 | if (client->retransmit_time == 0) { |
d1b0afe3 PF |
929 | client->retransmit_time = |
930 | client_timeout_compute_random(init_retransmit_time); | |
a9aff361 PF |
931 | |
932 | if (client->state == DHCP6_STATE_SOLICITATION) | |
933 | client->retransmit_time += init_retransmit_time / 10; | |
934 | ||
d1b0afe3 | 935 | } else { |
3ae01632 | 936 | if (max_retransmit_time > 0 && |
d1b0afe3 PF |
937 | client->retransmit_time > max_retransmit_time / 2) |
938 | client->retransmit_time = client_timeout_compute_random(max_retransmit_time); | |
939 | else | |
940 | client->retransmit_time += client_timeout_compute_random(client->retransmit_time); | |
941 | } | |
942 | ||
943 | log_dhcp6_client(client, "Next retransmission in %s", | |
ed19c567 | 944 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, client->retransmit_time, USEC_PER_SEC)); |
d1b0afe3 | 945 | |
c9393e8c YW |
946 | r = event_reset_time(client->event, &client->timeout_resend, |
947 | clock_boottime_or_monotonic(), | |
948 | time_now + client->retransmit_time, 10 * USEC_PER_MSEC, | |
949 | client_timeout_resend, client, | |
950 | client->event_priority, "dhcp6-resend-timer", true); | |
d1b0afe3 PF |
951 | if (r < 0) |
952 | goto error; | |
953 | ||
3ae01632 | 954 | if (max_retransmit_duration > 0 && event_source_is_enabled(client->timeout_resend_expire) <= 0) { |
d1b0afe3 PF |
955 | |
956 | log_dhcp6_client(client, "Max retransmission duration %"PRIu64" secs", | |
957 | max_retransmit_duration / USEC_PER_SEC); | |
958 | ||
c9393e8c YW |
959 | r = event_reset_time(client->event, &client->timeout_resend_expire, |
960 | clock_boottime_or_monotonic(), | |
961 | time_now + max_retransmit_duration, USEC_PER_SEC, | |
962 | client_timeout_resend_expire, client, | |
963 | client->event_priority, "dhcp6-resend-expire-timer", true); | |
9021bb9f TG |
964 | if (r < 0) |
965 | goto error; | |
d1b0afe3 PF |
966 | } |
967 | ||
968 | error: | |
969 | if (r < 0) | |
970 | client_stop(client, r); | |
971 | ||
972 | return 0; | |
973 | } | |
974 | ||
f12abb48 | 975 | static int client_ensure_iaid(sd_dhcp6_client *client) { |
cfb5b380 | 976 | int r; |
6d13616b | 977 | uint32_t iaid; |
f12abb48 PF |
978 | |
979 | assert(client); | |
980 | ||
8217ed5e | 981 | if (client->iaid_set) |
f12abb48 PF |
982 | return 0; |
983 | ||
6d13616b | 984 | r = dhcp_identifier_set_iaid(client->ifindex, client->mac_addr, client->mac_addr_len, true, &iaid); |
cfb5b380 TG |
985 | if (r < 0) |
986 | return r; | |
f12abb48 | 987 | |
69b43997 PF |
988 | client->ia_na.ia_na.id = iaid; |
989 | client->ia_pd.ia_pd.id = iaid; | |
8217ed5e | 990 | client->iaid_set = true; |
69b43997 | 991 | |
f12abb48 PF |
992 | return 0; |
993 | } | |
994 | ||
4b558378 ZJS |
995 | static int client_parse_message( |
996 | sd_dhcp6_client *client, | |
997 | DHCP6Message *message, | |
998 | size_t len, | |
999 | sd_dhcp6_lease *lease) { | |
da07cf35 YW |
1000 | |
1001 | uint32_t lt_t1 = ~0, lt_t2 = ~0; | |
1002 | bool clientid = false; | |
3bc424a3 | 1003 | size_t pos = 0; |
fcb51238 | 1004 | usec_t irt = IRT_DEFAULT; |
631bbe71 | 1005 | int r; |
631bbe71 | 1006 | |
a1140666 LP |
1007 | assert(client); |
1008 | assert(message); | |
1009 | assert(len >= sizeof(DHCP6Message)); | |
1010 | assert(lease); | |
1011 | ||
44481a8b ZJS |
1012 | len -= sizeof(DHCP6Message); |
1013 | ||
3bc424a3 | 1014 | while (pos < len) { |
da07cf35 | 1015 | DHCP6Option *option = (DHCP6Option *) &message->options[pos]; |
c6b4f32a | 1016 | uint16_t optcode, optlen; |
3bc424a3 | 1017 | be32_t iaid_lease; |
da07cf35 YW |
1018 | uint8_t *optval; |
1019 | int status; | |
3bc424a3 | 1020 | |
da07cf35 | 1021 | if (len < pos + offsetof(DHCP6Option, data)) |
3bc424a3 PF |
1022 | return -ENOBUFS; |
1023 | ||
1024 | optcode = be16toh(option->code); | |
1025 | optlen = be16toh(option->len); | |
1026 | optval = option->data; | |
1027 | ||
da07cf35 YW |
1028 | if (len < pos + offsetof(DHCP6Option, data) + optlen) |
1029 | return -ENOBUFS; | |
1030 | ||
631bbe71 | 1031 | switch (optcode) { |
2c1ab8ca | 1032 | case SD_DHCP6_OPTION_CLIENTID: |
631bbe71 PF |
1033 | if (clientid) { |
1034 | log_dhcp6_client(client, "%s contains multiple clientids", | |
1035 | dhcp6_message_type_to_string(message->type)); | |
1036 | return -EINVAL; | |
1037 | } | |
1038 | ||
66eac120 | 1039 | if (optlen != client->duid_len || |
631bbe71 PF |
1040 | memcmp(&client->duid, optval, optlen) != 0) { |
1041 | log_dhcp6_client(client, "%s DUID does not match", | |
1042 | dhcp6_message_type_to_string(message->type)); | |
1043 | ||
1044 | return -EINVAL; | |
1045 | } | |
1046 | clientid = true; | |
1047 | ||
1048 | break; | |
1049 | ||
2c1ab8ca | 1050 | case SD_DHCP6_OPTION_SERVERID: |
99f1d3fc ZJS |
1051 | r = dhcp6_lease_get_serverid(lease, NULL, NULL); |
1052 | if (r >= 0) { | |
631bbe71 PF |
1053 | log_dhcp6_client(client, "%s contains multiple serverids", |
1054 | dhcp6_message_type_to_string(message->type)); | |
1055 | return -EINVAL; | |
1056 | } | |
1057 | ||
1058 | r = dhcp6_lease_set_serverid(lease, optval, optlen); | |
1059 | if (r < 0) | |
1060 | return r; | |
1061 | ||
1062 | break; | |
1063 | ||
2c1ab8ca | 1064 | case SD_DHCP6_OPTION_PREFERENCE: |
631bbe71 PF |
1065 | if (optlen != 1) |
1066 | return -EINVAL; | |
1067 | ||
3bc424a3 | 1068 | r = dhcp6_lease_set_preference(lease, optval[0]); |
631bbe71 PF |
1069 | if (r < 0) |
1070 | return r; | |
1071 | ||
1072 | break; | |
1073 | ||
2c1ab8ca | 1074 | case SD_DHCP6_OPTION_STATUS_CODE: |
91c43f39 YW |
1075 | status = dhcp6_option_parse_status(option, optlen + sizeof(DHCP6Option)); |
1076 | if (status < 0) | |
1077 | return status; | |
1078 | ||
1079 | if (status > 0) { | |
631bbe71 PF |
1080 | log_dhcp6_client(client, "%s Status %s", |
1081 | dhcp6_message_type_to_string(message->type), | |
1082 | dhcp6_message_status_to_string(status)); | |
c6b4f32a | 1083 | |
631bbe71 PF |
1084 | return -EINVAL; |
1085 | } | |
1086 | ||
1087 | break; | |
1088 | ||
2c1ab8ca | 1089 | case SD_DHCP6_OPTION_IA_NA: |
bbfa43ca PF |
1090 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { |
1091 | log_dhcp6_client(client, "Information request ignoring IA NA option"); | |
1092 | ||
1093 | break; | |
1094 | } | |
1095 | ||
3bc424a3 | 1096 | r = dhcp6_option_parse_ia(option, &lease->ia); |
631bbe71 PF |
1097 | if (r < 0 && r != -ENOMSG) |
1098 | return r; | |
1099 | ||
1100 | r = dhcp6_lease_get_iaid(lease, &iaid_lease); | |
1101 | if (r < 0) | |
1102 | return r; | |
1103 | ||
e0026dcb | 1104 | if (client->ia_na.ia_na.id != iaid_lease) { |
dce6563f PF |
1105 | log_dhcp6_client(client, "%s has wrong IAID for IA NA", |
1106 | dhcp6_message_type_to_string(message->type)); | |
1107 | return -EINVAL; | |
1108 | } | |
1109 | ||
b47fb949 PF |
1110 | if (lease->ia.addresses) { |
1111 | lt_t1 = MIN(lt_t1, be32toh(lease->ia.ia_na.lifetime_t1)); | |
1112 | lt_t2 = MIN(lt_t2, be32toh(lease->ia.ia_na.lifetime_t1)); | |
1113 | } | |
1114 | ||
dce6563f PF |
1115 | break; |
1116 | ||
1117 | case SD_DHCP6_OPTION_IA_PD: | |
1118 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { | |
1119 | log_dhcp6_client(client, "Information request ignoring IA PD option"); | |
1120 | ||
1121 | break; | |
1122 | } | |
1123 | ||
1124 | r = dhcp6_option_parse_ia(option, &lease->pd); | |
1125 | if (r < 0 && r != -ENOMSG) | |
1126 | return r; | |
1127 | ||
49228c75 | 1128 | r = dhcp6_lease_get_pd_iaid(lease, &iaid_lease); |
dce6563f PF |
1129 | if (r < 0) |
1130 | return r; | |
1131 | ||
1132 | if (client->ia_pd.ia_pd.id != iaid_lease) { | |
1133 | log_dhcp6_client(client, "%s has wrong IAID for IA PD", | |
631bbe71 PF |
1134 | dhcp6_message_type_to_string(message->type)); |
1135 | return -EINVAL; | |
1136 | } | |
1137 | ||
b47fb949 PF |
1138 | if (lease->pd.addresses) { |
1139 | lt_t1 = MIN(lt_t1, be32toh(lease->pd.ia_pd.lifetime_t1)); | |
1140 | lt_t2 = MIN(lt_t2, be32toh(lease->pd.ia_pd.lifetime_t2)); | |
1141 | } | |
1142 | ||
631bbe71 | 1143 | break; |
ed6ee219 | 1144 | |
2c1ab8ca | 1145 | case SD_DHCP6_OPTION_RAPID_COMMIT: |
ed6ee219 PF |
1146 | r = dhcp6_lease_set_rapid_commit(lease); |
1147 | if (r < 0) | |
1148 | return r; | |
1149 | ||
1150 | break; | |
7bd8e95d | 1151 | |
2c1ab8ca | 1152 | case SD_DHCP6_OPTION_DNS_SERVERS: |
7bd8e95d PF |
1153 | r = dhcp6_lease_set_dns(lease, optval, optlen); |
1154 | if (r < 0) | |
1155 | return r; | |
1156 | ||
1157 | break; | |
5da1b97f | 1158 | |
2c1ab8ca | 1159 | case SD_DHCP6_OPTION_DOMAIN_LIST: |
5da1b97f PF |
1160 | r = dhcp6_lease_set_domains(lease, optval, optlen); |
1161 | if (r < 0) | |
1162 | return r; | |
1163 | ||
1164 | break; | |
1165 | ||
2c1ab8ca | 1166 | case SD_DHCP6_OPTION_NTP_SERVER: |
6599680e PF |
1167 | r = dhcp6_lease_set_ntp(lease, optval, optlen); |
1168 | if (r < 0) | |
1169 | return r; | |
1170 | ||
1171 | break; | |
41e4615d | 1172 | |
2c1ab8ca | 1173 | case SD_DHCP6_OPTION_SNTP_SERVERS: |
41e4615d PF |
1174 | r = dhcp6_lease_set_sntp(lease, optval, optlen); |
1175 | if (r < 0) | |
1176 | return r; | |
1177 | ||
1178 | break; | |
fcb51238 YW |
1179 | |
1180 | case SD_DHCP6_OPTION_INFORMATION_REFRESH_TIME: | |
6ffe71d0 YW |
1181 | if (optlen != 4) |
1182 | return -EINVAL; | |
1183 | ||
0eb5e6d3 | 1184 | irt = unaligned_read_be32((be32_t *) optval) * USEC_PER_SEC; |
fcb51238 | 1185 | break; |
631bbe71 | 1186 | } |
6599680e | 1187 | |
23976cb9 | 1188 | pos += offsetof(DHCP6Option, data) + optlen; |
631bbe71 PF |
1189 | } |
1190 | ||
1eeddba4 | 1191 | if (!clientid) { |
631bbe71 PF |
1192 | log_dhcp6_client(client, "%s has incomplete options", |
1193 | dhcp6_message_type_to_string(message->type)); | |
1194 | return -EINVAL; | |
1195 | } | |
1196 | ||
bbfa43ca | 1197 | if (client->state != DHCP6_STATE_INFORMATION_REQUEST) { |
99f1d3fc ZJS |
1198 | r = dhcp6_lease_get_serverid(lease, NULL, NULL); |
1199 | if (r < 0) { | |
bbfa43ca PF |
1200 | log_dhcp6_client(client, "%s has no server id", |
1201 | dhcp6_message_type_to_string(message->type)); | |
99f1d3fc ZJS |
1202 | return -EINVAL; |
1203 | } | |
b47fb949 | 1204 | |
99f1d3fc ZJS |
1205 | } else { |
1206 | if (lease->ia.addresses) { | |
1207 | lease->ia.ia_na.lifetime_t1 = htobe32(lt_t1); | |
1208 | lease->ia.ia_na.lifetime_t2 = htobe32(lt_t2); | |
1209 | } | |
b47fb949 | 1210 | |
99f1d3fc ZJS |
1211 | if (lease->pd.addresses) { |
1212 | lease->pd.ia_pd.lifetime_t1 = htobe32(lt_t1); | |
1213 | lease->pd.ia_pd.lifetime_t2 = htobe32(lt_t2); | |
1214 | } | |
bbfa43ca | 1215 | } |
631bbe71 | 1216 | |
fcb51238 YW |
1217 | client->information_refresh_time_usec = MAX(irt, IRT_MINIMUM); |
1218 | ||
21a9905c | 1219 | return 0; |
631bbe71 PF |
1220 | } |
1221 | ||
0ae0e5cd | 1222 | static int client_receive_reply(sd_dhcp6_client *client, DHCP6Message *reply, size_t len) { |
4afd3348 | 1223 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
ed6ee219 | 1224 | bool rapid_commit; |
a1140666 LP |
1225 | int r; |
1226 | ||
1227 | assert(client); | |
1228 | assert(reply); | |
a34b57c0 PF |
1229 | |
1230 | if (reply->type != DHCP6_REPLY) | |
ed6ee219 | 1231 | return 0; |
a34b57c0 PF |
1232 | |
1233 | r = dhcp6_lease_new(&lease); | |
1234 | if (r < 0) | |
1235 | return -ENOMEM; | |
1236 | ||
1237 | r = client_parse_message(client, reply, len, lease); | |
1238 | if (r < 0) | |
1239 | return r; | |
1240 | ||
ed6ee219 PF |
1241 | if (client->state == DHCP6_STATE_SOLICITATION) { |
1242 | r = dhcp6_lease_get_rapid_commit(lease, &rapid_commit); | |
1243 | if (r < 0) | |
1244 | return r; | |
1245 | ||
1246 | if (!rapid_commit) | |
1247 | return 0; | |
1248 | } | |
1249 | ||
431a4bc8 YW |
1250 | sd_dhcp6_lease_unref(client->lease); |
1251 | client->lease = TAKE_PTR(lease); | |
a34b57c0 PF |
1252 | |
1253 | return DHCP6_STATE_BOUND; | |
1254 | } | |
1255 | ||
0ae0e5cd | 1256 | static int client_receive_advertise(sd_dhcp6_client *client, DHCP6Message *advertise, size_t len) { |
4afd3348 | 1257 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
631bbe71 | 1258 | uint8_t pref_advertise = 0, pref_lease = 0; |
a1140666 | 1259 | int r; |
631bbe71 PF |
1260 | |
1261 | if (advertise->type != DHCP6_ADVERTISE) | |
ed6ee219 | 1262 | return 0; |
631bbe71 PF |
1263 | |
1264 | r = dhcp6_lease_new(&lease); | |
1265 | if (r < 0) | |
1266 | return r; | |
1267 | ||
1268 | r = client_parse_message(client, advertise, len, lease); | |
1269 | if (r < 0) | |
1270 | return r; | |
1271 | ||
1272 | r = dhcp6_lease_get_preference(lease, &pref_advertise); | |
1273 | if (r < 0) | |
1274 | return r; | |
1275 | ||
1276 | r = dhcp6_lease_get_preference(client->lease, &pref_lease); | |
bbfa43ca PF |
1277 | |
1278 | if (r < 0 || pref_advertise > pref_lease) { | |
431a4bc8 YW |
1279 | sd_dhcp6_lease_unref(client->lease); |
1280 | client->lease = TAKE_PTR(lease); | |
631bbe71 PF |
1281 | r = 0; |
1282 | } | |
1283 | ||
7246333c PF |
1284 | if (pref_advertise == 255 || client->retransmit_count > 1) |
1285 | r = DHCP6_STATE_REQUEST; | |
1286 | ||
631bbe71 PF |
1287 | return r; |
1288 | } | |
1289 | ||
004845d1 LP |
1290 | static int client_receive_message( |
1291 | sd_event_source *s, | |
1292 | int fd, uint32_t | |
1293 | revents, | |
1294 | void *userdata) { | |
1295 | ||
631bbe71 | 1296 | sd_dhcp6_client *client = userdata; |
3f0c075f | 1297 | DHCP6_CLIENT_DONT_DESTROY(client); |
0d43d2fc | 1298 | _cleanup_free_ DHCP6Message *message = NULL; |
4edc2c9b LP |
1299 | ssize_t buflen, len; |
1300 | int r = 0; | |
631bbe71 PF |
1301 | |
1302 | assert(s); | |
1303 | assert(client); | |
1304 | assert(client->event); | |
1305 | ||
4edc2c9b | 1306 | buflen = next_datagram_size_fd(fd); |
22a3fd2d BG |
1307 | if (buflen == -ENETDOWN) { |
1308 | /* the link is down. Don't return an error or the I/O event | |
1309 | source will be disconnected and we won't be able to receive | |
1310 | packets again when the link comes back. */ | |
1311 | return 0; | |
1312 | } | |
4edc2c9b LP |
1313 | if (buflen < 0) |
1314 | return buflen; | |
631bbe71 | 1315 | |
0d43d2fc | 1316 | message = malloc(buflen); |
631bbe71 PF |
1317 | if (!message) |
1318 | return -ENOMEM; | |
1319 | ||
cf447cb6 | 1320 | len = recv(fd, message, buflen, 0); |
0d43d2fc | 1321 | if (len < 0) { |
22a3fd2d BG |
1322 | /* see comment above for why we shouldn't error out on ENETDOWN. */ |
1323 | if (IN_SET(errno, EAGAIN, EINTR, ENETDOWN)) | |
0d43d2fc TG |
1324 | return 0; |
1325 | ||
bd9a7221 | 1326 | return log_dhcp6_client_errno(client, errno, "Could not receive message from UDP socket: %m"); |
0d43d2fc | 1327 | |
004845d1 LP |
1328 | } |
1329 | if ((size_t) len < sizeof(DHCP6Message)) { | |
1330 | log_dhcp6_client(client, "Too small to be DHCP6 message: ignoring"); | |
631bbe71 | 1331 | return 0; |
004845d1 | 1332 | } |
631bbe71 PF |
1333 | |
1334 | switch(message->type) { | |
1335 | case DHCP6_SOLICIT: | |
1336 | case DHCP6_REQUEST: | |
1337 | case DHCP6_CONFIRM: | |
1338 | case DHCP6_RENEW: | |
1339 | case DHCP6_REBIND: | |
1340 | case DHCP6_RELEASE: | |
1341 | case DHCP6_DECLINE: | |
1342 | case DHCP6_INFORMATION_REQUEST: | |
1343 | case DHCP6_RELAY_FORW: | |
1344 | case DHCP6_RELAY_REPL: | |
1345 | return 0; | |
1346 | ||
1347 | case DHCP6_ADVERTISE: | |
1348 | case DHCP6_REPLY: | |
1349 | case DHCP6_RECONFIGURE: | |
1350 | break; | |
1351 | ||
1352 | default: | |
bd9a7221 | 1353 | log_dhcp6_client(client, "Unknown message type %d", message->type); |
631bbe71 PF |
1354 | return 0; |
1355 | } | |
1356 | ||
1357 | if (client->transaction_id != (message->transaction_id & | |
1358 | htobe32(0x00ffffff))) | |
1359 | return 0; | |
1360 | ||
1361 | switch (client->state) { | |
bbfa43ca PF |
1362 | case DHCP6_STATE_INFORMATION_REQUEST: |
1363 | r = client_receive_reply(client, message, len); | |
1364 | if (r < 0) | |
1365 | return 0; | |
1366 | ||
10c9ce61 | 1367 | client_notify(client, SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST); |
bbfa43ca PF |
1368 | |
1369 | client_start(client, DHCP6_STATE_STOPPED); | |
1370 | ||
1371 | break; | |
1372 | ||
631bbe71 PF |
1373 | case DHCP6_STATE_SOLICITATION: |
1374 | r = client_receive_advertise(client, message, len); | |
1375 | ||
ed6ee219 | 1376 | if (r == DHCP6_STATE_REQUEST) { |
7246333c PF |
1377 | client_start(client, r); |
1378 | ||
ed6ee219 PF |
1379 | break; |
1380 | } | |
631bbe71 | 1381 | |
4831981d | 1382 | _fallthrough_; /* for Soliciation Rapid Commit option check */ |
7246333c | 1383 | case DHCP6_STATE_REQUEST: |
3dc34fcc PF |
1384 | case DHCP6_STATE_RENEW: |
1385 | case DHCP6_STATE_REBIND: | |
1386 | ||
a34b57c0 PF |
1387 | r = client_receive_reply(client, message, len); |
1388 | if (r < 0) | |
1389 | return 0; | |
1390 | ||
1391 | if (r == DHCP6_STATE_BOUND) { | |
1392 | ||
1393 | r = client_start(client, DHCP6_STATE_BOUND); | |
1394 | if (r < 0) { | |
1395 | client_stop(client, r); | |
1396 | return 0; | |
1397 | } | |
1398 | ||
10c9ce61 | 1399 | client_notify(client, SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE); |
a34b57c0 PF |
1400 | } |
1401 | ||
1402 | break; | |
1403 | ||
1404 | case DHCP6_STATE_BOUND: | |
1405 | ||
1406 | break; | |
1407 | ||
631bbe71 | 1408 | case DHCP6_STATE_STOPPED: |
631bbe71 PF |
1409 | return 0; |
1410 | } | |
1411 | ||
712fdfd6 YW |
1412 | log_dhcp6_client(client, "Recv %s", |
1413 | dhcp6_message_type_to_string(message->type)); | |
631bbe71 | 1414 | |
a9aff361 PF |
1415 | return 0; |
1416 | } | |
1417 | ||
134ebaa4 PF |
1418 | static int client_get_lifetime(sd_dhcp6_client *client, uint32_t *lifetime_t1, |
1419 | uint32_t *lifetime_t2) { | |
1420 | assert_return(client, -EINVAL); | |
1421 | assert_return(client->lease, -EINVAL); | |
1422 | ||
1423 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA) && client->lease->ia.addresses) { | |
1424 | *lifetime_t1 = be32toh(client->lease->ia.ia_na.lifetime_t1); | |
1425 | *lifetime_t2 = be32toh(client->lease->ia.ia_na.lifetime_t2); | |
1426 | ||
1427 | return 0; | |
1428 | } | |
1429 | ||
1430 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD) && client->lease->pd.addresses) { | |
1431 | *lifetime_t1 = be32toh(client->lease->pd.ia_pd.lifetime_t1); | |
1432 | *lifetime_t2 = be32toh(client->lease->pd.ia_pd.lifetime_t2); | |
1433 | ||
1434 | return 0; | |
1435 | } | |
1436 | ||
1437 | return -ENOMSG; | |
1438 | } | |
1439 | ||
0ae0e5cd | 1440 | static int client_start(sd_dhcp6_client *client, enum DHCP6State state) { |
f12abb48 | 1441 | int r; |
a34b57c0 PF |
1442 | usec_t timeout, time_now; |
1443 | char time_string[FORMAT_TIMESPAN_MAX]; | |
134ebaa4 | 1444 | uint32_t lifetime_t1, lifetime_t2; |
f12abb48 PF |
1445 | |
1446 | assert_return(client, -EINVAL); | |
1447 | assert_return(client->event, -EINVAL); | |
2f8e7633 | 1448 | assert_return(client->ifindex > 0, -EINVAL); |
c3e2adea | 1449 | assert_return(client->state != state, -EINVAL); |
f12abb48 | 1450 | |
c9393e8c YW |
1451 | (void) event_source_disable(client->timeout_resend_expire); |
1452 | (void) event_source_disable(client->timeout_resend); | |
c3e2adea PF |
1453 | client->retransmit_time = 0; |
1454 | client->retransmit_count = 0; | |
f12abb48 | 1455 | |
38a03f06 LP |
1456 | r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now); |
1457 | if (r < 0) | |
1458 | return r; | |
346e13a2 | 1459 | |
7ac6c26a PF |
1460 | if (!client->receive_message) { |
1461 | r = sd_event_add_io(client->event, &client->receive_message, | |
1462 | client->fd, EPOLLIN, client_receive_message, | |
1463 | client); | |
1464 | if (r < 0) | |
1465 | goto error; | |
1466 | ||
1467 | r = sd_event_source_set_priority(client->receive_message, | |
1468 | client->event_priority); | |
1469 | if (r < 0) | |
1470 | goto error; | |
1471 | ||
1472 | r = sd_event_source_set_description(client->receive_message, | |
1473 | "dhcp6-receive-message"); | |
1474 | if (r < 0) | |
1475 | goto error; | |
1476 | } | |
1477 | ||
c3e2adea PF |
1478 | switch (state) { |
1479 | case DHCP6_STATE_STOPPED: | |
bbfa43ca PF |
1480 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { |
1481 | client->state = DHCP6_STATE_STOPPED; | |
a9aff361 | 1482 | |
bbfa43ca PF |
1483 | return 0; |
1484 | } | |
9021bb9f | 1485 | |
4831981d | 1486 | _fallthrough_; |
bbfa43ca | 1487 | case DHCP6_STATE_SOLICITATION: |
c3e2adea PF |
1488 | client->state = DHCP6_STATE_SOLICITATION; |
1489 | ||
7246333c PF |
1490 | break; |
1491 | ||
bbfa43ca | 1492 | case DHCP6_STATE_INFORMATION_REQUEST: |
7246333c | 1493 | case DHCP6_STATE_REQUEST: |
3dc34fcc PF |
1494 | case DHCP6_STATE_RENEW: |
1495 | case DHCP6_STATE_REBIND: | |
a34b57c0 | 1496 | |
7246333c PF |
1497 | client->state = state; |
1498 | ||
c3e2adea | 1499 | break; |
a34b57c0 PF |
1500 | |
1501 | case DHCP6_STATE_BOUND: | |
1502 | ||
134ebaa4 PF |
1503 | r = client_get_lifetime(client, &lifetime_t1, &lifetime_t2); |
1504 | if (r < 0) | |
1505 | goto error; | |
a34b57c0 | 1506 | |
134ebaa4 | 1507 | if (lifetime_t1 == 0xffffffff || lifetime_t2 == 0xffffffff) { |
bd9a7221 | 1508 | log_dhcp6_client(client, "Infinite T1 0x%08x or T2 0x%08x", |
134ebaa4 | 1509 | lifetime_t1, lifetime_t2); |
a34b57c0 PF |
1510 | |
1511 | return 0; | |
1512 | } | |
1513 | ||
134ebaa4 | 1514 | timeout = client_timeout_compute_random(lifetime_t1 * USEC_PER_SEC); |
a34b57c0 PF |
1515 | |
1516 | log_dhcp6_client(client, "T1 expires in %s", | |
ed19c567 | 1517 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC)); |
a34b57c0 | 1518 | |
c9393e8c YW |
1519 | r = event_reset_time(client->event, &client->timeout_t1, |
1520 | clock_boottime_or_monotonic(), | |
1521 | time_now + timeout, 10 * USEC_PER_SEC, | |
1522 | client_timeout_t1, client, | |
1523 | client->event_priority, "dhcp6-t1-timeout", true); | |
9021bb9f | 1524 | if (r < 0) |
7ac6c26a | 1525 | goto error; |
9021bb9f | 1526 | |
134ebaa4 | 1527 | timeout = client_timeout_compute_random(lifetime_t2 * USEC_PER_SEC); |
a34b57c0 PF |
1528 | |
1529 | log_dhcp6_client(client, "T2 expires in %s", | |
ed19c567 | 1530 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC)); |
a34b57c0 | 1531 | |
c9393e8c YW |
1532 | r = event_reset_time(client->event, &client->timeout_t2, |
1533 | clock_boottime_or_monotonic(), | |
1534 | time_now + timeout, 10 * USEC_PER_SEC, | |
1535 | client_timeout_t2, client, | |
1536 | client->event_priority, "dhcp6-t2-timeout", true); | |
9021bb9f | 1537 | if (r < 0) |
7ac6c26a | 1538 | goto error; |
9021bb9f | 1539 | |
3dc34fcc PF |
1540 | client->state = state; |
1541 | ||
a34b57c0 | 1542 | return 0; |
c3e2adea | 1543 | } |
a9aff361 | 1544 | |
c3e2adea | 1545 | client->transaction_id = random_u32() & htobe32(0x00ffffff); |
346e13a2 | 1546 | client->transaction_start = time_now; |
d1b0afe3 | 1547 | |
c9393e8c YW |
1548 | r = event_reset_time(client->event, &client->timeout_resend, |
1549 | clock_boottime_or_monotonic(), | |
1550 | 0, 0, | |
1551 | client_timeout_resend, client, | |
1552 | client->event_priority, "dhcp6-resend-timeout", true); | |
9021bb9f | 1553 | if (r < 0) |
7ac6c26a | 1554 | goto error; |
9021bb9f | 1555 | |
f12abb48 | 1556 | return 0; |
7ac6c26a PF |
1557 | |
1558 | error: | |
1559 | client_reset(client); | |
1560 | return r; | |
f12abb48 PF |
1561 | } |
1562 | ||
0ae0e5cd | 1563 | int sd_dhcp6_client_stop(sd_dhcp6_client *client) { |
f667c150 TG |
1564 | assert_return(client, -EINVAL); |
1565 | ||
10c9ce61 | 1566 | client_stop(client, SD_DHCP6_CLIENT_EVENT_STOP); |
139b011a | 1567 | |
7ac6c26a PF |
1568 | client->fd = safe_close(client->fd); |
1569 | ||
139b011a PF |
1570 | return 0; |
1571 | } | |
1572 | ||
f667c150 TG |
1573 | int sd_dhcp6_client_is_running(sd_dhcp6_client *client) { |
1574 | assert_return(client, -EINVAL); | |
1575 | ||
1576 | return client->state != DHCP6_STATE_STOPPED; | |
1577 | } | |
1578 | ||
0ae0e5cd | 1579 | int sd_dhcp6_client_start(sd_dhcp6_client *client) { |
bbfa43ca | 1580 | enum DHCP6State state = DHCP6_STATE_SOLICITATION; |
2f8e7633 | 1581 | int r = 0; |
139b011a PF |
1582 | |
1583 | assert_return(client, -EINVAL); | |
1584 | assert_return(client->event, -EINVAL); | |
2f8e7633 | 1585 | assert_return(client->ifindex > 0, -EINVAL); |
c601ebf7 | 1586 | assert_return(in_addr_is_link_local(AF_INET6, (const union in_addr_union *) &client->local_address) > 0, -EINVAL); |
139b011a | 1587 | |
d7c9c21f | 1588 | if (!IN_SET(client->state, DHCP6_STATE_STOPPED)) |
63348d13 | 1589 | return -EBUSY; |
d7c9c21f | 1590 | |
f311a62b PF |
1591 | if (!client->information_request && !client->request) |
1592 | return -EINVAL; | |
1593 | ||
c806ffb9 | 1594 | r = client_reset(client); |
f12abb48 PF |
1595 | if (r < 0) |
1596 | return r; | |
1597 | ||
bbfa43ca PF |
1598 | r = client_ensure_iaid(client); |
1599 | if (r < 0) | |
1600 | return r; | |
1601 | ||
cc22955c TH |
1602 | r = client_ensure_duid(client); |
1603 | if (r < 0) | |
1604 | return r; | |
1605 | ||
10a0f27b PF |
1606 | if (client->fd < 0) { |
1607 | r = dhcp6_network_bind_udp_socket(client->ifindex, &client->local_address); | |
1608 | if (r < 0) { | |
1609 | _cleanup_free_ char *p = NULL; | |
1610 | ||
1611 | (void) in_addr_to_string(AF_INET6, (const union in_addr_union*) &client->local_address, &p); | |
1612 | return log_dhcp6_client_errno(client, r, | |
1613 | "Failed to bind to UDP socket at address %s: %m", strna(p)); | |
1614 | } | |
bd9a7221 | 1615 | |
10a0f27b | 1616 | client->fd = r; |
bd9a7221 | 1617 | } |
bbfa43ca | 1618 | |
fcb51238 YW |
1619 | if (client->information_request) { |
1620 | usec_t t = now(CLOCK_MONOTONIC); | |
1621 | ||
1622 | if (t < usec_add(client->information_request_time_usec, client->information_refresh_time_usec)) | |
1623 | return 0; | |
1624 | ||
1625 | client->information_request_time_usec = t; | |
bbfa43ca | 1626 | state = DHCP6_STATE_INFORMATION_REQUEST; |
fcb51238 | 1627 | } |
bbfa43ca PF |
1628 | |
1629 | log_dhcp6_client(client, "Started in %s mode", | |
483d099e ZJS |
1630 | client->information_request? "Information request": |
1631 | "Managed"); | |
bbfa43ca PF |
1632 | |
1633 | return client_start(client, state); | |
139b011a PF |
1634 | } |
1635 | ||
32d20645 | 1636 | int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event, int64_t priority) { |
139b011a PF |
1637 | int r; |
1638 | ||
1639 | assert_return(client, -EINVAL); | |
1640 | assert_return(!client->event, -EBUSY); | |
1641 | ||
1642 | if (event) | |
1643 | client->event = sd_event_ref(event); | |
1644 | else { | |
1645 | r = sd_event_default(&client->event); | |
1646 | if (r < 0) | |
1647 | return 0; | |
1648 | } | |
1649 | ||
1650 | client->event_priority = priority; | |
1651 | ||
1652 | return 0; | |
1653 | } | |
1654 | ||
1655 | int sd_dhcp6_client_detach_event(sd_dhcp6_client *client) { | |
1656 | assert_return(client, -EINVAL); | |
1657 | ||
1658 | client->event = sd_event_unref(client->event); | |
1659 | ||
1660 | return 0; | |
1661 | } | |
1662 | ||
1663 | sd_event *sd_dhcp6_client_get_event(sd_dhcp6_client *client) { | |
a1140666 | 1664 | assert_return(client, NULL); |
139b011a PF |
1665 | |
1666 | return client->event; | |
1667 | } | |
1668 | ||
8301aa0b YW |
1669 | static sd_dhcp6_client *dhcp6_client_free(sd_dhcp6_client *client) { |
1670 | assert(client); | |
139b011a | 1671 | |
c9393e8c YW |
1672 | client->timeout_resend = sd_event_source_unref(client->timeout_resend); |
1673 | client->timeout_resend_expire = sd_event_source_unref(client->timeout_resend_expire); | |
1674 | client->timeout_t1 = sd_event_source_unref(client->timeout_t1); | |
1675 | client->timeout_t2 = sd_event_source_unref(client->timeout_t2); | |
1676 | ||
3733eec3 LP |
1677 | client_reset(client); |
1678 | ||
10a0f27b PF |
1679 | client->fd = safe_close(client->fd); |
1680 | ||
3733eec3 | 1681 | sd_dhcp6_client_detach_event(client); |
3733eec3 LP |
1682 | |
1683 | free(client->req_opts); | |
8006aa32 | 1684 | free(client->fqdn); |
de8d6e55 | 1685 | free(client->mudurl); |
33923925 | 1686 | |
e7d5fe17 | 1687 | ordered_hashmap_free(client->extra_options); |
33923925 | 1688 | strv_free(client->user_class); |
73c8ced7 | 1689 | strv_free(client->vendor_class); |
33923925 | 1690 | |
6b430fdb | 1691 | return mfree(client); |
139b011a PF |
1692 | } |
1693 | ||
8301aa0b YW |
1694 | DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp6_client, sd_dhcp6_client, dhcp6_client_free); |
1695 | ||
0ae0e5cd | 1696 | int sd_dhcp6_client_new(sd_dhcp6_client **ret) { |
4afd3348 | 1697 | _cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL; |
8b8ecac8 | 1698 | _cleanup_free_ be16_t *req_opts = NULL; |
da6fe470 | 1699 | size_t t; |
139b011a PF |
1700 | |
1701 | assert_return(ret, -EINVAL); | |
1702 | ||
8b8ecac8 YW |
1703 | req_opts = new(be16_t, ELEMENTSOF(default_req_opts)); |
1704 | if (!req_opts) | |
139b011a PF |
1705 | return -ENOMEM; |
1706 | ||
8b8ecac8 YW |
1707 | for (t = 0; t < ELEMENTSOF(default_req_opts); t++) |
1708 | req_opts[t] = htobe16(default_req_opts[t]); | |
c806ffb9 | 1709 | |
8b8ecac8 YW |
1710 | client = new(sd_dhcp6_client, 1); |
1711 | if (!client) | |
da6fe470 PF |
1712 | return -ENOMEM; |
1713 | ||
8b8ecac8 YW |
1714 | *client = (sd_dhcp6_client) { |
1715 | .n_ref = 1, | |
1716 | .ia_na.type = SD_DHCP6_OPTION_IA_NA, | |
1717 | .ia_pd.type = SD_DHCP6_OPTION_IA_PD, | |
1718 | .ifindex = -1, | |
1719 | .request = DHCP6_REQUEST_IA_NA, | |
1720 | .fd = -1, | |
1721 | .req_opts_len = ELEMENTSOF(default_req_opts), | |
2805536b SS |
1722 | .hint_pd_prefix.iapdprefix.lifetime_preferred = (be32_t) -1, |
1723 | .hint_pd_prefix.iapdprefix.lifetime_valid = (be32_t) -1, | |
8b8ecac8 YW |
1724 | .req_opts = TAKE_PTR(req_opts), |
1725 | }; | |
da6fe470 | 1726 | |
1cc6c93a | 1727 | *ret = TAKE_PTR(client); |
139b011a PF |
1728 | |
1729 | return 0; | |
1730 | } |