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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; |
a9aff361 | 70 | sd_event_source *receive_message; |
d1b0afe3 PF |
71 | usec_t retransmit_time; |
72 | uint8_t retransmit_count; | |
73 | sd_event_source *timeout_resend; | |
74 | sd_event_source *timeout_resend_expire; | |
45aa74c7 | 75 | sd_dhcp6_client_callback_t callback; |
139b011a | 76 | void *userdata; |
764aad62 | 77 | struct duid duid; |
66eac120 | 78 | size_t duid_len; |
fcb51238 YW |
79 | usec_t information_request_time_usec; |
80 | usec_t information_refresh_time_usec; | |
139b011a PF |
81 | }; |
82 | ||
da6fe470 | 83 | static const uint16_t default_req_opts[] = { |
2c1ab8ca BG |
84 | SD_DHCP6_OPTION_DNS_SERVERS, |
85 | SD_DHCP6_OPTION_DOMAIN_LIST, | |
86 | SD_DHCP6_OPTION_NTP_SERVER, | |
87 | SD_DHCP6_OPTION_SNTP_SERVERS, | |
da6fe470 PF |
88 | }; |
89 | ||
a9aff361 PF |
90 | const char * dhcp6_message_type_table[_DHCP6_MESSAGE_MAX] = { |
91 | [DHCP6_SOLICIT] = "SOLICIT", | |
92 | [DHCP6_ADVERTISE] = "ADVERTISE", | |
93 | [DHCP6_REQUEST] = "REQUEST", | |
94 | [DHCP6_CONFIRM] = "CONFIRM", | |
95 | [DHCP6_RENEW] = "RENEW", | |
96 | [DHCP6_REBIND] = "REBIND", | |
97 | [DHCP6_REPLY] = "REPLY", | |
98 | [DHCP6_RELEASE] = "RELEASE", | |
99 | [DHCP6_DECLINE] = "DECLINE", | |
100 | [DHCP6_RECONFIGURE] = "RECONFIGURE", | |
101 | [DHCP6_INFORMATION_REQUEST] = "INFORMATION-REQUEST", | |
102 | [DHCP6_RELAY_FORW] = "RELAY-FORW", | |
103 | [DHCP6_RELAY_REPL] = "RELAY-REPL", | |
104 | }; | |
105 | ||
106 | DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_type, int); | |
107 | ||
631bbe71 | 108 | const char * dhcp6_message_status_table[_DHCP6_STATUS_MAX] = { |
76643fed SS |
109 | [DHCP6_STATUS_SUCCESS] = "Success", |
110 | [DHCP6_STATUS_UNSPEC_FAIL] = "Unspecified failure", | |
111 | [DHCP6_STATUS_NO_ADDRS_AVAIL] = "No addresses available", | |
112 | [DHCP6_STATUS_NO_BINDING] = "Binding unavailable", | |
113 | [DHCP6_STATUS_NOT_ON_LINK] = "Not on link", | |
114 | [DHCP6_STATUS_USE_MULTICAST] = "Use multicast", | |
115 | [DHCP6_STATUS_NO_PREFIX_AVAIL] = "No prefix available", | |
116 | [DHCP6_STATUS_UNKNOWN_QUERY_TYPE] = "Unknown query type", | |
117 | [DHCP6_STATUS_MALFORMED_QUERY] = "Malformed query", | |
118 | [DHCP6_STATUS_NOT_CONFIGURED] = "Not configured", | |
119 | [DHCP6_STATUS_NOT_ALLOWED] = "Not allowed", | |
120 | [DHCP6_STATUS_QUERY_TERMINATED] = "Query terminated", | |
121 | [DHCP6_STATUS_DATA_MISSING] = "Data missing", | |
122 | [DHCP6_STATUS_CATCHUP_COMPLETE] = "Catch up complete", | |
123 | [DHCP6_STATUS_NOT_SUPPORTED] = "Not supported", | |
124 | [DHCP6_STATUS_TLS_CONNECTION_REFUSED] = "TLS connection refused", | |
125 | [DHCP6_STATUS_ADDRESS_IN_USE] = "Address in use", | |
126 | [DHCP6_STATUS_CONFIGURATION_CONFLICT] = "Configuration conflict", | |
127 | [DHCP6_STATUS_MISSING_BINDING_INFORMATION] = "Missing binding information", | |
128 | [DHCP6_STATUS_OUTDATED_BINDING_INFORMATION] = "Outdated binding information", | |
129 | [DHCP6_STATUS_SERVER_SHUTTING_DOWN] = "Server shutting down", | |
130 | [DHCP6_STATUS_DNS_UPDATE_NOT_SUPPORTED] = "DNS update not supported", | |
131 | [DHCP6_STATUS_EXCESSIVE_TIME_SKEW] = "Excessive time skew", | |
631bbe71 PF |
132 | }; |
133 | ||
134 | DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_status, int); | |
135 | ||
3f0c075f | 136 | #define DHCP6_CLIENT_DONT_DESTROY(client) \ |
4afd3348 | 137 | _cleanup_(sd_dhcp6_client_unrefp) _unused_ sd_dhcp6_client *_dont_destroy_##client = sd_dhcp6_client_ref(client) |
3f0c075f | 138 | |
c3e2adea PF |
139 | static int client_start(sd_dhcp6_client *client, enum DHCP6State state); |
140 | ||
4b558378 ZJS |
141 | int sd_dhcp6_client_set_callback( |
142 | sd_dhcp6_client *client, | |
143 | sd_dhcp6_client_callback_t cb, | |
144 | void *userdata) { | |
45aa74c7 | 145 | |
139b011a PF |
146 | assert_return(client, -EINVAL); |
147 | ||
45aa74c7 | 148 | client->callback = cb; |
139b011a PF |
149 | client->userdata = userdata; |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
2f8e7633 | 154 | int sd_dhcp6_client_set_ifindex(sd_dhcp6_client *client, int ifindex) { |
139b011a | 155 | |
2f8e7633 LP |
156 | assert_return(client, -EINVAL); |
157 | assert_return(ifindex >= -1, -EINVAL); | |
d7c9c21f PF |
158 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
159 | ||
2f8e7633 | 160 | client->ifindex = ifindex; |
139b011a PF |
161 | return 0; |
162 | } | |
163 | ||
4b558378 ZJS |
164 | int sd_dhcp6_client_set_local_address( |
165 | sd_dhcp6_client *client, | |
166 | const struct in6_addr *local_address) { | |
167 | ||
c601ebf7 TG |
168 | assert_return(client, -EINVAL); |
169 | assert_return(local_address, -EINVAL); | |
170 | assert_return(in_addr_is_link_local(AF_INET6, (const union in_addr_union *) local_address) > 0, -EINVAL); | |
171 | ||
172 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); | |
173 | ||
174 | client->local_address = *local_address; | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
0ae0e5cd LP |
179 | int sd_dhcp6_client_set_mac( |
180 | sd_dhcp6_client *client, | |
181 | const uint8_t *addr, size_t addr_len, | |
182 | uint16_t arp_type) { | |
183 | ||
139b011a | 184 | assert_return(client, -EINVAL); |
76253e73 DW |
185 | assert_return(addr, -EINVAL); |
186 | assert_return(addr_len > 0 && addr_len <= MAX_MAC_ADDR_LEN, -EINVAL); | |
187 | assert_return(arp_type > 0, -EINVAL); | |
188 | ||
d7c9c21f PF |
189 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
190 | ||
76253e73 DW |
191 | if (arp_type == ARPHRD_ETHER) |
192 | assert_return(addr_len == ETH_ALEN, -EINVAL); | |
193 | else if (arp_type == ARPHRD_INFINIBAND) | |
194 | assert_return(addr_len == INFINIBAND_ALEN, -EINVAL); | |
139b011a | 195 | else |
76253e73 DW |
196 | return -EINVAL; |
197 | ||
198 | if (client->mac_addr_len == addr_len && | |
199 | memcmp(&client->mac_addr, addr, addr_len) == 0) | |
200 | return 0; | |
201 | ||
202 | memcpy(&client->mac_addr, addr, addr_len); | |
203 | client->mac_addr_len = addr_len; | |
204 | client->arp_type = arp_type; | |
139b011a PF |
205 | |
206 | return 0; | |
207 | } | |
208 | ||
2805536b SS |
209 | int sd_dhcp6_client_set_prefix_delegation_hint( |
210 | sd_dhcp6_client *client, | |
211 | uint8_t prefixlen, | |
212 | const struct in6_addr *pd_address) { | |
213 | ||
214 | assert_return(client, -EINVAL); | |
215 | assert_return(pd_address, -EINVAL); | |
216 | ||
217 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); | |
218 | ||
219 | client->hint_pd_prefix.iapdprefix.address = *pd_address; | |
220 | client->hint_pd_prefix.iapdprefix.prefixlen = prefixlen; | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
0ae0e5cd | 225 | static int client_ensure_duid(sd_dhcp6_client *client) { |
cc22955c TH |
226 | if (client->duid_len != 0) |
227 | return 0; | |
0ae0e5cd | 228 | |
cc22955c TH |
229 | return dhcp_identifier_set_duid_en(&client->duid, &client->duid_len); |
230 | } | |
231 | ||
d7df2fd3 ZJS |
232 | /** |
233 | * Sets DUID. If duid is non-null, the DUID is set to duid_type + duid | |
234 | * without further modification. Otherwise, if duid_type is supported, DUID | |
235 | * is set based on that type. Otherwise, an error is returned. | |
236 | */ | |
7e90a499 | 237 | static int dhcp6_client_set_duid_internal( |
4b558378 ZJS |
238 | sd_dhcp6_client *client, |
239 | uint16_t duid_type, | |
f7a92d1a | 240 | const void *duid, |
7e90a499 YW |
241 | size_t duid_len, |
242 | usec_t llt_time) { | |
413708d1 | 243 | int r; |
27eba50e | 244 | |
66eac120 | 245 | assert_return(client, -EINVAL); |
d7df2fd3 | 246 | assert_return(duid_len == 0 || duid != NULL, -EINVAL); |
afec4539 | 247 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
c83321e6 | 248 | |
d7df2fd3 | 249 | if (duid != NULL) { |
ab4a88bc TH |
250 | r = dhcp_validate_duid_len(duid_type, duid_len, true); |
251 | if (r < 0) { | |
252 | r = dhcp_validate_duid_len(duid_type, duid_len, false); | |
253 | if (r < 0) | |
a339859f | 254 | return log_dhcp6_client_errno(client, r, "Failed to validate length of DUID: %m"); |
ab4a88bc TH |
255 | log_dhcp6_client(client, "Setting DUID of type %u with unexpected content", duid_type); |
256 | } | |
d7df2fd3 | 257 | |
413708d1 VK |
258 | client->duid.type = htobe16(duid_type); |
259 | memcpy(&client->duid.raw.data, duid, duid_len); | |
d7df2fd3 | 260 | client->duid_len = sizeof(client->duid.type) + duid_len; |
d7df2fd3 | 261 | } else |
27eba50e | 262 | switch (duid_type) { |
335f80a6 | 263 | case DUID_TYPE_LLT: |
339697f0 | 264 | if (client->mac_addr_len == 0) |
a339859f | 265 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EOPNOTSUPP), "Failed to set DUID-LLT, MAC address is not set."); |
335f80a6 | 266 | |
53253d9c | 267 | r = dhcp_identifier_set_duid_llt(&client->duid, llt_time, client->mac_addr, client->mac_addr_len, client->arp_type, &client->duid_len); |
335f80a6 | 268 | if (r < 0) |
a339859f | 269 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-LLT: %m"); |
335f80a6 | 270 | break; |
27eba50e YW |
271 | case DUID_TYPE_EN: |
272 | r = dhcp_identifier_set_duid_en(&client->duid, &client->duid_len); | |
273 | if (r < 0) | |
a339859f | 274 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-EN: %m"); |
27eba50e | 275 | break; |
335f80a6 | 276 | case DUID_TYPE_LL: |
339697f0 | 277 | if (client->mac_addr_len == 0) |
a339859f | 278 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EOPNOTSUPP), "Failed to set DUID-LL, MAC address is not set."); |
335f80a6 YW |
279 | |
280 | r = dhcp_identifier_set_duid_ll(&client->duid, client->mac_addr, client->mac_addr_len, client->arp_type, &client->duid_len); | |
281 | if (r < 0) | |
a339859f | 282 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-LL: %m"); |
335f80a6 | 283 | break; |
27eba50e YW |
284 | case DUID_TYPE_UUID: |
285 | r = dhcp_identifier_set_duid_uuid(&client->duid, &client->duid_len); | |
286 | if (r < 0) | |
a339859f | 287 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-UUID: %m"); |
27eba50e YW |
288 | break; |
289 | default: | |
a339859f | 290 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EINVAL), "Invalid DUID type"); |
27eba50e | 291 | } |
fe4b2156 | 292 | |
413708d1 VK |
293 | return 0; |
294 | } | |
295 | ||
7e90a499 YW |
296 | int sd_dhcp6_client_set_duid( |
297 | sd_dhcp6_client *client, | |
298 | uint16_t duid_type, | |
299 | const void *duid, | |
300 | size_t duid_len) { | |
301 | return dhcp6_client_set_duid_internal(client, duid_type, duid, duid_len, 0); | |
302 | } | |
303 | ||
304 | int sd_dhcp6_client_set_duid_llt( | |
305 | sd_dhcp6_client *client, | |
306 | usec_t llt_time) { | |
307 | return dhcp6_client_set_duid_internal(client, DUID_TYPE_LLT, NULL, 0, llt_time); | |
308 | } | |
309 | ||
413708d1 VK |
310 | int sd_dhcp6_client_set_iaid(sd_dhcp6_client *client, uint32_t iaid) { |
311 | assert_return(client, -EINVAL); | |
312 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); | |
313 | ||
e0026dcb | 314 | client->ia_na.ia_na.id = htobe32(iaid); |
dce6563f | 315 | client->ia_pd.ia_pd.id = htobe32(iaid); |
8217ed5e | 316 | client->iaid_set = true; |
66eac120 DW |
317 | |
318 | return 0; | |
319 | } | |
320 | ||
8006aa32 SA |
321 | int sd_dhcp6_client_set_fqdn( |
322 | sd_dhcp6_client *client, | |
323 | const char *fqdn) { | |
324 | ||
325 | assert_return(client, -EINVAL); | |
326 | ||
327 | /* Make sure FQDN qualifies as DNS and as Linux hostname */ | |
328 | if (fqdn && | |
329 | !(hostname_is_valid(fqdn, false) && dns_name_is_valid(fqdn) > 0)) | |
330 | return -EINVAL; | |
331 | ||
332 | return free_and_strdup(&client->fqdn, fqdn); | |
333 | } | |
334 | ||
04c01369 | 335 | int sd_dhcp6_client_set_information_request(sd_dhcp6_client *client, int enabled) { |
bbfa43ca | 336 | assert_return(client, -EINVAL); |
d7c9c21f PF |
337 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
338 | ||
bbfa43ca PF |
339 | client->information_request = enabled; |
340 | ||
341 | return 0; | |
342 | } | |
343 | ||
04c01369 | 344 | int sd_dhcp6_client_get_information_request(sd_dhcp6_client *client, int *enabled) { |
bbfa43ca PF |
345 | assert_return(client, -EINVAL); |
346 | assert_return(enabled, -EINVAL); | |
347 | ||
348 | *enabled = client->information_request; | |
349 | ||
350 | return 0; | |
351 | } | |
352 | ||
0ae0e5cd | 353 | int sd_dhcp6_client_set_request_option(sd_dhcp6_client *client, uint16_t option) { |
da6fe470 PF |
354 | size_t t; |
355 | ||
356 | assert_return(client, -EINVAL); | |
357 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
358 | ||
359 | switch(option) { | |
a1140666 | 360 | |
2c1ab8ca BG |
361 | case SD_DHCP6_OPTION_DNS_SERVERS: |
362 | case SD_DHCP6_OPTION_DOMAIN_LIST: | |
363 | case SD_DHCP6_OPTION_SNTP_SERVERS: | |
364 | case SD_DHCP6_OPTION_NTP_SERVER: | |
fb5c8216 | 365 | case SD_DHCP6_OPTION_RAPID_COMMIT: |
da6fe470 PF |
366 | break; |
367 | ||
368 | default: | |
369 | return -EINVAL; | |
370 | } | |
371 | ||
372 | for (t = 0; t < client->req_opts_len; t++) | |
373 | if (client->req_opts[t] == htobe16(option)) | |
374 | return -EEXIST; | |
375 | ||
376 | if (!GREEDY_REALLOC(client->req_opts, client->req_opts_allocated, | |
377 | client->req_opts_len + 1)) | |
378 | return -ENOMEM; | |
379 | ||
380 | client->req_opts[client->req_opts_len++] = htobe16(option); | |
381 | ||
382 | return 0; | |
383 | } | |
384 | ||
feb7d7a2 | 385 | int sd_dhcp6_client_set_request_mud_url(sd_dhcp6_client *client, const char *mudurl) { |
de8d6e55 SS |
386 | |
387 | assert_return(client, -EINVAL); | |
388 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
389 | assert_return(mudurl, -EINVAL); | |
390 | assert_return(strlen(mudurl) <= 255, -EINVAL); | |
391 | assert_return(http_url_is_valid(mudurl), -EINVAL); | |
392 | ||
393 | return free_and_strdup(&client->mudurl, mudurl); | |
394 | } | |
395 | ||
d8c51121 PF |
396 | int sd_dhcp6_client_get_prefix_delegation(sd_dhcp6_client *client, int *delegation) { |
397 | assert_return(client, -EINVAL); | |
398 | assert_return(delegation, -EINVAL); | |
399 | ||
f311a62b | 400 | *delegation = FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD); |
d8c51121 PF |
401 | |
402 | return 0; | |
403 | } | |
404 | ||
405 | int sd_dhcp6_client_set_prefix_delegation(sd_dhcp6_client *client, int delegation) { | |
7c3de8f8 PF |
406 | assert_return(client, -EINVAL); |
407 | ||
f311a62b PF |
408 | SET_FLAG(client->request, DHCP6_REQUEST_IA_PD, delegation); |
409 | ||
410 | return 0; | |
411 | } | |
412 | ||
413 | int sd_dhcp6_client_get_address_request(sd_dhcp6_client *client, int *request) { | |
414 | assert_return(client, -EINVAL); | |
415 | assert_return(request, -EINVAL); | |
416 | ||
417 | *request = FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA); | |
418 | ||
419 | return 0; | |
420 | } | |
421 | ||
422 | int sd_dhcp6_client_set_address_request(sd_dhcp6_client *client, int request) { | |
423 | assert_return(client, -EINVAL); | |
424 | ||
425 | SET_FLAG(client->request, DHCP6_REQUEST_IA_NA, request); | |
7c3de8f8 PF |
426 | |
427 | return 0; | |
428 | } | |
429 | ||
b62f9008 | 430 | int sd_dhcp6_client_set_transaction_id(sd_dhcp6_client *client, uint32_t transaction_id) { |
d89a400e EV |
431 | assert_return(client, -EINVAL); |
432 | ||
433 | client->transaction_id = transaction_id; | |
434 | ||
435 | return 0; | |
436 | } | |
437 | ||
ea3b3a75 PF |
438 | int sd_dhcp6_client_get_lease(sd_dhcp6_client *client, sd_dhcp6_lease **ret) { |
439 | assert_return(client, -EINVAL); | |
ea3b3a75 PF |
440 | |
441 | if (!client->lease) | |
442 | return -ENOMSG; | |
443 | ||
3098562c TG |
444 | if (ret) |
445 | *ret = client->lease; | |
ea3b3a75 PF |
446 | |
447 | return 0; | |
448 | } | |
449 | ||
3f0c075f | 450 | static void client_notify(sd_dhcp6_client *client, int event) { |
45aa74c7 LP |
451 | assert(client); |
452 | ||
453 | if (client->callback) | |
454 | client->callback(client, event, client->userdata); | |
139b011a PF |
455 | } |
456 | ||
f8908727 | 457 | static int client_reset(sd_dhcp6_client *client) { |
a1140666 | 458 | assert(client); |
f8908727 | 459 | |
431a4bc8 | 460 | client->lease = sd_dhcp6_lease_unref(client->lease); |
4e3e6679 | 461 | |
a9aff361 PF |
462 | client->receive_message = |
463 | sd_event_source_unref(client->receive_message); | |
464 | ||
c3e2adea | 465 | client->transaction_id = 0; |
346e13a2 | 466 | client->transaction_start = 0; |
a9aff361 | 467 | |
d1b0afe3 PF |
468 | client->retransmit_time = 0; |
469 | client->retransmit_count = 0; | |
d1b0afe3 | 470 | |
c9393e8c YW |
471 | (void) event_source_disable(client->timeout_resend); |
472 | (void) event_source_disable(client->timeout_resend_expire); | |
473 | (void) event_source_disable(client->timeout_t1); | |
474 | (void) event_source_disable(client->timeout_t2); | |
213e759a | 475 | |
139b011a PF |
476 | client->state = DHCP6_STATE_STOPPED; |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
3f0c075f PF |
481 | static void client_stop(sd_dhcp6_client *client, int error) { |
482 | DHCP6_CLIENT_DONT_DESTROY(client); | |
139b011a | 483 | |
3f0c075f | 484 | assert(client); |
139b011a | 485 | |
3f0c075f PF |
486 | client_notify(client, error); |
487 | ||
488 | client_reset(client); | |
139b011a PF |
489 | } |
490 | ||
346e13a2 | 491 | static int client_send_message(sd_dhcp6_client *client, usec_t time_now) { |
a9aff361 PF |
492 | _cleanup_free_ DHCP6Message *message = NULL; |
493 | struct in6_addr all_servers = | |
494 | IN6ADDR_ALL_DHCP6_RELAY_AGENTS_AND_SERVERS_INIT; | |
495 | size_t len, optlen = 512; | |
496 | uint8_t *opt; | |
497 | int r; | |
346e13a2 PF |
498 | usec_t elapsed_usec; |
499 | be16_t elapsed_time; | |
a9aff361 | 500 | |
a1140666 LP |
501 | assert(client); |
502 | ||
a9aff361 PF |
503 | len = sizeof(DHCP6Message) + optlen; |
504 | ||
505 | message = malloc0(len); | |
506 | if (!message) | |
507 | return -ENOMEM; | |
508 | ||
509 | opt = (uint8_t *)(message + 1); | |
510 | ||
511 | message->transaction_id = client->transaction_id; | |
512 | ||
513 | switch(client->state) { | |
bbfa43ca PF |
514 | case DHCP6_STATE_INFORMATION_REQUEST: |
515 | message->type = DHCP6_INFORMATION_REQUEST; | |
516 | ||
de8d6e55 SS |
517 | if (client->mudurl) { |
518 | r = dhcp6_option_append(&opt, &optlen, | |
519 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
520 | client->mudurl); | |
521 | if (r < 0) | |
522 | return r; | |
523 | } | |
524 | ||
bbfa43ca PF |
525 | break; |
526 | ||
a9aff361 PF |
527 | case DHCP6_STATE_SOLICITATION: |
528 | message->type = DHCP6_SOLICIT; | |
529 | ||
ed6ee219 | 530 | r = dhcp6_option_append(&opt, &optlen, |
2c1ab8ca | 531 | SD_DHCP6_OPTION_RAPID_COMMIT, 0, NULL); |
926695f1 TA |
532 | if (r < 0) |
533 | return r; | |
ed6ee219 | 534 | |
f311a62b PF |
535 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
536 | r = dhcp6_option_append_ia(&opt, &optlen, | |
537 | &client->ia_na); | |
538 | if (r < 0) | |
539 | return r; | |
540 | } | |
a9aff361 | 541 | |
8006aa32 SA |
542 | if (client->fqdn) { |
543 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
544 | if (r < 0) | |
545 | return r; | |
546 | } | |
547 | ||
de8d6e55 SS |
548 | if (client->mudurl) { |
549 | r = dhcp6_option_append(&opt, &optlen, | |
550 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
551 | client->mudurl); | |
552 | if (r < 0) | |
553 | return r; | |
554 | } | |
555 | ||
f311a62b | 556 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
2805536b | 557 | r = dhcp6_option_append_pd(opt, optlen, &client->ia_pd, &client->hint_pd_prefix); |
7c3de8f8 PF |
558 | if (r < 0) |
559 | return r; | |
560 | ||
561 | opt += r; | |
562 | optlen -= r; | |
563 | } | |
564 | ||
7246333c PF |
565 | break; |
566 | ||
567 | case DHCP6_STATE_REQUEST: | |
3dc34fcc PF |
568 | case DHCP6_STATE_RENEW: |
569 | ||
570 | if (client->state == DHCP6_STATE_REQUEST) | |
571 | message->type = DHCP6_REQUEST; | |
572 | else | |
573 | message->type = DHCP6_RENEW; | |
7246333c | 574 | |
2c1ab8ca | 575 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_SERVERID, |
7246333c PF |
576 | client->lease->serverid_len, |
577 | client->lease->serverid); | |
578 | if (r < 0) | |
579 | return r; | |
580 | ||
f311a62b PF |
581 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
582 | r = dhcp6_option_append_ia(&opt, &optlen, | |
583 | &client->lease->ia); | |
584 | if (r < 0) | |
585 | return r; | |
586 | } | |
a9aff361 | 587 | |
8006aa32 SA |
588 | if (client->fqdn) { |
589 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
590 | if (r < 0) | |
591 | return r; | |
592 | } | |
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 | ||
f311a62b | 602 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
2805536b | 603 | r = dhcp6_option_append_pd(opt, optlen, &client->lease->pd, NULL); |
7c3de8f8 PF |
604 | if (r < 0) |
605 | return r; | |
606 | ||
607 | opt += r; | |
608 | optlen -= r; | |
609 | } | |
610 | ||
a9aff361 PF |
611 | break; |
612 | ||
3dc34fcc PF |
613 | case DHCP6_STATE_REBIND: |
614 | message->type = DHCP6_REBIND; | |
615 | ||
f311a62b PF |
616 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
617 | r = dhcp6_option_append_ia(&opt, &optlen, &client->lease->ia); | |
618 | if (r < 0) | |
619 | return r; | |
620 | } | |
3dc34fcc | 621 | |
8006aa32 SA |
622 | if (client->fqdn) { |
623 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
624 | if (r < 0) | |
625 | return r; | |
626 | } | |
627 | ||
de8d6e55 SS |
628 | if (client->mudurl) { |
629 | r = dhcp6_option_append(&opt, &optlen, | |
630 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
631 | client->mudurl); | |
632 | if (r < 0) | |
633 | return r; | |
634 | } | |
635 | ||
f311a62b | 636 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
2805536b | 637 | r = dhcp6_option_append_pd(opt, optlen, &client->lease->pd, NULL); |
7c3de8f8 PF |
638 | if (r < 0) |
639 | return r; | |
640 | ||
641 | opt += r; | |
642 | optlen -= r; | |
643 | } | |
644 | ||
3dc34fcc PF |
645 | break; |
646 | ||
a9aff361 | 647 | case DHCP6_STATE_STOPPED: |
a34b57c0 | 648 | case DHCP6_STATE_BOUND: |
a9aff361 PF |
649 | return -EINVAL; |
650 | } | |
651 | ||
2c1ab8ca | 652 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ORO, |
da6fe470 PF |
653 | client->req_opts_len * sizeof(be16_t), |
654 | client->req_opts); | |
655 | if (r < 0) | |
656 | return r; | |
657 | ||
ccd1fc2f | 658 | assert(client->duid_len); |
2c1ab8ca | 659 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_CLIENTID, |
66eac120 | 660 | client->duid_len, &client->duid); |
7246333c PF |
661 | if (r < 0) |
662 | return r; | |
663 | ||
346e13a2 PF |
664 | elapsed_usec = time_now - client->transaction_start; |
665 | if (elapsed_usec < 0xffff * USEC_PER_MSEC * 10) | |
666 | elapsed_time = htobe16(elapsed_usec / USEC_PER_MSEC / 10); | |
667 | else | |
668 | elapsed_time = 0xffff; | |
669 | ||
2c1ab8ca | 670 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ELAPSED_TIME, |
346e13a2 PF |
671 | sizeof(elapsed_time), &elapsed_time); |
672 | if (r < 0) | |
673 | return r; | |
674 | ||
a9aff361 PF |
675 | r = dhcp6_network_send_udp_socket(client->fd, &all_servers, message, |
676 | len - optlen); | |
677 | if (r < 0) | |
678 | return r; | |
679 | ||
680 | log_dhcp6_client(client, "Sent %s", | |
681 | dhcp6_message_type_to_string(message->type)); | |
682 | ||
683 | return 0; | |
684 | } | |
685 | ||
4b558378 | 686 | static int client_timeout_t2(sd_event_source *s, uint64_t usec, void *userdata) { |
a34b57c0 PF |
687 | sd_dhcp6_client *client = userdata; |
688 | ||
a1140666 LP |
689 | assert(s); |
690 | assert(client); | |
691 | assert(client->lease); | |
a34b57c0 | 692 | |
c9393e8c | 693 | (void) event_source_disable(client->timeout_t2); |
a34b57c0 PF |
694 | |
695 | log_dhcp6_client(client, "Timeout T2"); | |
696 | ||
3dc34fcc PF |
697 | client_start(client, DHCP6_STATE_REBIND); |
698 | ||
a34b57c0 PF |
699 | return 0; |
700 | } | |
701 | ||
4b558378 | 702 | static int client_timeout_t1(sd_event_source *s, uint64_t usec, void *userdata) { |
a34b57c0 PF |
703 | sd_dhcp6_client *client = userdata; |
704 | ||
a1140666 LP |
705 | assert(s); |
706 | assert(client); | |
707 | assert(client->lease); | |
a34b57c0 | 708 | |
c9393e8c | 709 | (void) event_source_disable(client->timeout_t1); |
a34b57c0 PF |
710 | |
711 | log_dhcp6_client(client, "Timeout T1"); | |
712 | ||
3dc34fcc PF |
713 | client_start(client, DHCP6_STATE_RENEW); |
714 | ||
a34b57c0 PF |
715 | return 0; |
716 | } | |
717 | ||
4b558378 | 718 | static int client_timeout_resend_expire(sd_event_source *s, uint64_t usec, void *userdata) { |
d1b0afe3 | 719 | sd_dhcp6_client *client = userdata; |
3dc34fcc PF |
720 | DHCP6_CLIENT_DONT_DESTROY(client); |
721 | enum DHCP6State state; | |
d1b0afe3 PF |
722 | |
723 | assert(s); | |
724 | assert(client); | |
725 | assert(client->event); | |
726 | ||
3dc34fcc PF |
727 | state = client->state; |
728 | ||
10c9ce61 | 729 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE); |
d1b0afe3 | 730 | |
3dc34fcc PF |
731 | /* RFC 3315, section 18.1.4., says that "...the client may choose to |
732 | use a Solicit message to locate a new DHCP server..." */ | |
733 | if (state == DHCP6_STATE_REBIND) | |
734 | client_start(client, DHCP6_STATE_SOLICITATION); | |
735 | ||
d1b0afe3 PF |
736 | return 0; |
737 | } | |
738 | ||
739 | static usec_t client_timeout_compute_random(usec_t val) { | |
9de8a425 | 740 | return val - (random_u32() % USEC_PER_SEC) * val / 10 / USEC_PER_SEC; |
d1b0afe3 PF |
741 | } |
742 | ||
4b558378 | 743 | static int client_timeout_resend(sd_event_source *s, uint64_t usec, void *userdata) { |
d1b0afe3 PF |
744 | int r = 0; |
745 | sd_dhcp6_client *client = userdata; | |
4b4923e6 | 746 | usec_t time_now, init_retransmit_time = 0, max_retransmit_time = 0; |
5e913450 | 747 | usec_t max_retransmit_duration = 0; |
513a6fa8 | 748 | uint8_t max_retransmit_count = 0; |
d1b0afe3 PF |
749 | char time_string[FORMAT_TIMESPAN_MAX]; |
750 | ||
751 | assert(s); | |
752 | assert(client); | |
753 | assert(client->event); | |
754 | ||
c9393e8c | 755 | (void) event_source_disable(client->timeout_resend); |
d1b0afe3 PF |
756 | |
757 | switch (client->state) { | |
bbfa43ca PF |
758 | case DHCP6_STATE_INFORMATION_REQUEST: |
759 | init_retransmit_time = DHCP6_INF_TIMEOUT; | |
760 | max_retransmit_time = DHCP6_INF_MAX_RT; | |
761 | ||
762 | break; | |
763 | ||
d1b0afe3 | 764 | case DHCP6_STATE_SOLICITATION: |
7246333c PF |
765 | |
766 | if (client->retransmit_count && client->lease) { | |
767 | client_start(client, DHCP6_STATE_REQUEST); | |
768 | return 0; | |
769 | } | |
770 | ||
d1b0afe3 PF |
771 | init_retransmit_time = DHCP6_SOL_TIMEOUT; |
772 | max_retransmit_time = DHCP6_SOL_MAX_RT; | |
d1b0afe3 PF |
773 | |
774 | break; | |
775 | ||
7246333c PF |
776 | case DHCP6_STATE_REQUEST: |
777 | init_retransmit_time = DHCP6_REQ_TIMEOUT; | |
778 | max_retransmit_time = DHCP6_REQ_MAX_RT; | |
779 | max_retransmit_count = DHCP6_REQ_MAX_RC; | |
7246333c PF |
780 | |
781 | break; | |
782 | ||
3dc34fcc PF |
783 | case DHCP6_STATE_RENEW: |
784 | init_retransmit_time = DHCP6_REN_TIMEOUT; | |
785 | max_retransmit_time = DHCP6_REN_MAX_RT; | |
3dc34fcc PF |
786 | |
787 | /* RFC 3315, section 18.1.3. says max retransmit duration will | |
788 | be the remaining time until T2. Instead of setting MRD, | |
789 | wait for T2 to trigger with the same end result */ | |
3dc34fcc PF |
790 | |
791 | break; | |
792 | ||
793 | case DHCP6_STATE_REBIND: | |
794 | init_retransmit_time = DHCP6_REB_TIMEOUT; | |
795 | max_retransmit_time = DHCP6_REB_MAX_RT; | |
3dc34fcc | 796 | |
c9393e8c | 797 | if (event_source_is_enabled(client->timeout_resend_expire) <= 0) { |
3ae01632 YW |
798 | uint32_t expire = 0; |
799 | ||
800 | r = dhcp6_lease_ia_rebind_expire(&client->lease->ia, &expire); | |
3dc34fcc PF |
801 | if (r < 0) { |
802 | client_stop(client, r); | |
803 | return 0; | |
804 | } | |
805 | max_retransmit_duration = expire * USEC_PER_SEC; | |
806 | } | |
807 | ||
808 | break; | |
809 | ||
d1b0afe3 | 810 | case DHCP6_STATE_STOPPED: |
a34b57c0 | 811 | case DHCP6_STATE_BOUND: |
d1b0afe3 PF |
812 | return 0; |
813 | } | |
814 | ||
3ae01632 | 815 | if (max_retransmit_count > 0 && |
d1b0afe3 | 816 | client->retransmit_count >= max_retransmit_count) { |
10c9ce61 | 817 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RETRANS_MAX); |
d1b0afe3 PF |
818 | return 0; |
819 | } | |
820 | ||
fa94c34b | 821 | r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now); |
d1b0afe3 PF |
822 | if (r < 0) |
823 | goto error; | |
824 | ||
346e13a2 PF |
825 | r = client_send_message(client, time_now); |
826 | if (r >= 0) | |
827 | client->retransmit_count++; | |
828 | ||
3ae01632 | 829 | if (client->retransmit_time == 0) { |
d1b0afe3 PF |
830 | client->retransmit_time = |
831 | client_timeout_compute_random(init_retransmit_time); | |
a9aff361 PF |
832 | |
833 | if (client->state == DHCP6_STATE_SOLICITATION) | |
834 | client->retransmit_time += init_retransmit_time / 10; | |
835 | ||
d1b0afe3 | 836 | } else { |
3ae01632 | 837 | if (max_retransmit_time > 0 && |
d1b0afe3 PF |
838 | client->retransmit_time > max_retransmit_time / 2) |
839 | client->retransmit_time = client_timeout_compute_random(max_retransmit_time); | |
840 | else | |
841 | client->retransmit_time += client_timeout_compute_random(client->retransmit_time); | |
842 | } | |
843 | ||
844 | log_dhcp6_client(client, "Next retransmission in %s", | |
ed19c567 | 845 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, client->retransmit_time, USEC_PER_SEC)); |
d1b0afe3 | 846 | |
c9393e8c YW |
847 | r = event_reset_time(client->event, &client->timeout_resend, |
848 | clock_boottime_or_monotonic(), | |
849 | time_now + client->retransmit_time, 10 * USEC_PER_MSEC, | |
850 | client_timeout_resend, client, | |
851 | client->event_priority, "dhcp6-resend-timer", true); | |
d1b0afe3 PF |
852 | if (r < 0) |
853 | goto error; | |
854 | ||
3ae01632 | 855 | if (max_retransmit_duration > 0 && event_source_is_enabled(client->timeout_resend_expire) <= 0) { |
d1b0afe3 PF |
856 | |
857 | log_dhcp6_client(client, "Max retransmission duration %"PRIu64" secs", | |
858 | max_retransmit_duration / USEC_PER_SEC); | |
859 | ||
c9393e8c YW |
860 | r = event_reset_time(client->event, &client->timeout_resend_expire, |
861 | clock_boottime_or_monotonic(), | |
862 | time_now + max_retransmit_duration, USEC_PER_SEC, | |
863 | client_timeout_resend_expire, client, | |
864 | client->event_priority, "dhcp6-resend-expire-timer", true); | |
9021bb9f TG |
865 | if (r < 0) |
866 | goto error; | |
d1b0afe3 PF |
867 | } |
868 | ||
869 | error: | |
870 | if (r < 0) | |
871 | client_stop(client, r); | |
872 | ||
873 | return 0; | |
874 | } | |
875 | ||
f12abb48 | 876 | static int client_ensure_iaid(sd_dhcp6_client *client) { |
cfb5b380 | 877 | int r; |
6d13616b | 878 | uint32_t iaid; |
f12abb48 PF |
879 | |
880 | assert(client); | |
881 | ||
8217ed5e | 882 | if (client->iaid_set) |
f12abb48 PF |
883 | return 0; |
884 | ||
6d13616b | 885 | r = dhcp_identifier_set_iaid(client->ifindex, client->mac_addr, client->mac_addr_len, true, &iaid); |
cfb5b380 TG |
886 | if (r < 0) |
887 | return r; | |
f12abb48 | 888 | |
69b43997 PF |
889 | client->ia_na.ia_na.id = iaid; |
890 | client->ia_pd.ia_pd.id = iaid; | |
8217ed5e | 891 | client->iaid_set = true; |
69b43997 | 892 | |
f12abb48 PF |
893 | return 0; |
894 | } | |
895 | ||
4b558378 ZJS |
896 | static int client_parse_message( |
897 | sd_dhcp6_client *client, | |
898 | DHCP6Message *message, | |
899 | size_t len, | |
900 | sd_dhcp6_lease *lease) { | |
da07cf35 YW |
901 | |
902 | uint32_t lt_t1 = ~0, lt_t2 = ~0; | |
903 | bool clientid = false; | |
3bc424a3 | 904 | size_t pos = 0; |
fcb51238 | 905 | usec_t irt = IRT_DEFAULT; |
631bbe71 | 906 | int r; |
631bbe71 | 907 | |
a1140666 LP |
908 | assert(client); |
909 | assert(message); | |
910 | assert(len >= sizeof(DHCP6Message)); | |
911 | assert(lease); | |
912 | ||
44481a8b ZJS |
913 | len -= sizeof(DHCP6Message); |
914 | ||
3bc424a3 | 915 | while (pos < len) { |
da07cf35 | 916 | DHCP6Option *option = (DHCP6Option *) &message->options[pos]; |
c6b4f32a | 917 | uint16_t optcode, optlen; |
3bc424a3 | 918 | be32_t iaid_lease; |
da07cf35 YW |
919 | uint8_t *optval; |
920 | int status; | |
3bc424a3 | 921 | |
da07cf35 | 922 | if (len < pos + offsetof(DHCP6Option, data)) |
3bc424a3 PF |
923 | return -ENOBUFS; |
924 | ||
925 | optcode = be16toh(option->code); | |
926 | optlen = be16toh(option->len); | |
927 | optval = option->data; | |
928 | ||
da07cf35 YW |
929 | if (len < pos + offsetof(DHCP6Option, data) + optlen) |
930 | return -ENOBUFS; | |
931 | ||
631bbe71 | 932 | switch (optcode) { |
2c1ab8ca | 933 | case SD_DHCP6_OPTION_CLIENTID: |
631bbe71 PF |
934 | if (clientid) { |
935 | log_dhcp6_client(client, "%s contains multiple clientids", | |
936 | dhcp6_message_type_to_string(message->type)); | |
937 | return -EINVAL; | |
938 | } | |
939 | ||
66eac120 | 940 | if (optlen != client->duid_len || |
631bbe71 PF |
941 | memcmp(&client->duid, optval, optlen) != 0) { |
942 | log_dhcp6_client(client, "%s DUID does not match", | |
943 | dhcp6_message_type_to_string(message->type)); | |
944 | ||
945 | return -EINVAL; | |
946 | } | |
947 | clientid = true; | |
948 | ||
949 | break; | |
950 | ||
2c1ab8ca | 951 | case SD_DHCP6_OPTION_SERVERID: |
99f1d3fc ZJS |
952 | r = dhcp6_lease_get_serverid(lease, NULL, NULL); |
953 | if (r >= 0) { | |
631bbe71 PF |
954 | log_dhcp6_client(client, "%s contains multiple serverids", |
955 | dhcp6_message_type_to_string(message->type)); | |
956 | return -EINVAL; | |
957 | } | |
958 | ||
959 | r = dhcp6_lease_set_serverid(lease, optval, optlen); | |
960 | if (r < 0) | |
961 | return r; | |
962 | ||
963 | break; | |
964 | ||
2c1ab8ca | 965 | case SD_DHCP6_OPTION_PREFERENCE: |
631bbe71 PF |
966 | if (optlen != 1) |
967 | return -EINVAL; | |
968 | ||
3bc424a3 | 969 | r = dhcp6_lease_set_preference(lease, optval[0]); |
631bbe71 PF |
970 | if (r < 0) |
971 | return r; | |
972 | ||
973 | break; | |
974 | ||
2c1ab8ca | 975 | case SD_DHCP6_OPTION_STATUS_CODE: |
91c43f39 YW |
976 | status = dhcp6_option_parse_status(option, optlen + sizeof(DHCP6Option)); |
977 | if (status < 0) | |
978 | return status; | |
979 | ||
980 | if (status > 0) { | |
631bbe71 PF |
981 | log_dhcp6_client(client, "%s Status %s", |
982 | dhcp6_message_type_to_string(message->type), | |
983 | dhcp6_message_status_to_string(status)); | |
c6b4f32a | 984 | |
631bbe71 PF |
985 | return -EINVAL; |
986 | } | |
987 | ||
988 | break; | |
989 | ||
2c1ab8ca | 990 | case SD_DHCP6_OPTION_IA_NA: |
bbfa43ca PF |
991 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { |
992 | log_dhcp6_client(client, "Information request ignoring IA NA option"); | |
993 | ||
994 | break; | |
995 | } | |
996 | ||
3bc424a3 | 997 | r = dhcp6_option_parse_ia(option, &lease->ia); |
631bbe71 PF |
998 | if (r < 0 && r != -ENOMSG) |
999 | return r; | |
1000 | ||
1001 | r = dhcp6_lease_get_iaid(lease, &iaid_lease); | |
1002 | if (r < 0) | |
1003 | return r; | |
1004 | ||
e0026dcb | 1005 | if (client->ia_na.ia_na.id != iaid_lease) { |
dce6563f PF |
1006 | log_dhcp6_client(client, "%s has wrong IAID for IA NA", |
1007 | dhcp6_message_type_to_string(message->type)); | |
1008 | return -EINVAL; | |
1009 | } | |
1010 | ||
b47fb949 PF |
1011 | if (lease->ia.addresses) { |
1012 | lt_t1 = MIN(lt_t1, be32toh(lease->ia.ia_na.lifetime_t1)); | |
1013 | lt_t2 = MIN(lt_t2, be32toh(lease->ia.ia_na.lifetime_t1)); | |
1014 | } | |
1015 | ||
dce6563f PF |
1016 | break; |
1017 | ||
1018 | case SD_DHCP6_OPTION_IA_PD: | |
1019 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { | |
1020 | log_dhcp6_client(client, "Information request ignoring IA PD option"); | |
1021 | ||
1022 | break; | |
1023 | } | |
1024 | ||
1025 | r = dhcp6_option_parse_ia(option, &lease->pd); | |
1026 | if (r < 0 && r != -ENOMSG) | |
1027 | return r; | |
1028 | ||
49228c75 | 1029 | r = dhcp6_lease_get_pd_iaid(lease, &iaid_lease); |
dce6563f PF |
1030 | if (r < 0) |
1031 | return r; | |
1032 | ||
1033 | if (client->ia_pd.ia_pd.id != iaid_lease) { | |
1034 | log_dhcp6_client(client, "%s has wrong IAID for IA PD", | |
631bbe71 PF |
1035 | dhcp6_message_type_to_string(message->type)); |
1036 | return -EINVAL; | |
1037 | } | |
1038 | ||
b47fb949 PF |
1039 | if (lease->pd.addresses) { |
1040 | lt_t1 = MIN(lt_t1, be32toh(lease->pd.ia_pd.lifetime_t1)); | |
1041 | lt_t2 = MIN(lt_t2, be32toh(lease->pd.ia_pd.lifetime_t2)); | |
1042 | } | |
1043 | ||
631bbe71 | 1044 | break; |
ed6ee219 | 1045 | |
2c1ab8ca | 1046 | case SD_DHCP6_OPTION_RAPID_COMMIT: |
ed6ee219 PF |
1047 | r = dhcp6_lease_set_rapid_commit(lease); |
1048 | if (r < 0) | |
1049 | return r; | |
1050 | ||
1051 | break; | |
7bd8e95d | 1052 | |
2c1ab8ca | 1053 | case SD_DHCP6_OPTION_DNS_SERVERS: |
7bd8e95d PF |
1054 | r = dhcp6_lease_set_dns(lease, optval, optlen); |
1055 | if (r < 0) | |
1056 | return r; | |
1057 | ||
1058 | break; | |
5da1b97f | 1059 | |
2c1ab8ca | 1060 | case SD_DHCP6_OPTION_DOMAIN_LIST: |
5da1b97f PF |
1061 | r = dhcp6_lease_set_domains(lease, optval, optlen); |
1062 | if (r < 0) | |
1063 | return r; | |
1064 | ||
1065 | break; | |
1066 | ||
2c1ab8ca | 1067 | case SD_DHCP6_OPTION_NTP_SERVER: |
6599680e PF |
1068 | r = dhcp6_lease_set_ntp(lease, optval, optlen); |
1069 | if (r < 0) | |
1070 | return r; | |
1071 | ||
1072 | break; | |
41e4615d | 1073 | |
2c1ab8ca | 1074 | case SD_DHCP6_OPTION_SNTP_SERVERS: |
41e4615d PF |
1075 | r = dhcp6_lease_set_sntp(lease, optval, optlen); |
1076 | if (r < 0) | |
1077 | return r; | |
1078 | ||
1079 | break; | |
fcb51238 YW |
1080 | |
1081 | case SD_DHCP6_OPTION_INFORMATION_REFRESH_TIME: | |
6ffe71d0 YW |
1082 | if (optlen != 4) |
1083 | return -EINVAL; | |
1084 | ||
0eb5e6d3 | 1085 | irt = unaligned_read_be32((be32_t *) optval) * USEC_PER_SEC; |
fcb51238 | 1086 | break; |
631bbe71 | 1087 | } |
6599680e | 1088 | |
23976cb9 | 1089 | pos += offsetof(DHCP6Option, data) + optlen; |
631bbe71 PF |
1090 | } |
1091 | ||
1eeddba4 | 1092 | if (!clientid) { |
631bbe71 PF |
1093 | log_dhcp6_client(client, "%s has incomplete options", |
1094 | dhcp6_message_type_to_string(message->type)); | |
1095 | return -EINVAL; | |
1096 | } | |
1097 | ||
bbfa43ca | 1098 | if (client->state != DHCP6_STATE_INFORMATION_REQUEST) { |
99f1d3fc ZJS |
1099 | r = dhcp6_lease_get_serverid(lease, NULL, NULL); |
1100 | if (r < 0) { | |
bbfa43ca PF |
1101 | log_dhcp6_client(client, "%s has no server id", |
1102 | dhcp6_message_type_to_string(message->type)); | |
99f1d3fc ZJS |
1103 | return -EINVAL; |
1104 | } | |
b47fb949 | 1105 | |
99f1d3fc ZJS |
1106 | } else { |
1107 | if (lease->ia.addresses) { | |
1108 | lease->ia.ia_na.lifetime_t1 = htobe32(lt_t1); | |
1109 | lease->ia.ia_na.lifetime_t2 = htobe32(lt_t2); | |
1110 | } | |
b47fb949 | 1111 | |
99f1d3fc ZJS |
1112 | if (lease->pd.addresses) { |
1113 | lease->pd.ia_pd.lifetime_t1 = htobe32(lt_t1); | |
1114 | lease->pd.ia_pd.lifetime_t2 = htobe32(lt_t2); | |
1115 | } | |
bbfa43ca | 1116 | } |
631bbe71 | 1117 | |
fcb51238 YW |
1118 | client->information_refresh_time_usec = MAX(irt, IRT_MINIMUM); |
1119 | ||
21a9905c | 1120 | return 0; |
631bbe71 PF |
1121 | } |
1122 | ||
0ae0e5cd | 1123 | static int client_receive_reply(sd_dhcp6_client *client, DHCP6Message *reply, size_t len) { |
4afd3348 | 1124 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
ed6ee219 | 1125 | bool rapid_commit; |
a1140666 LP |
1126 | int r; |
1127 | ||
1128 | assert(client); | |
1129 | assert(reply); | |
a34b57c0 PF |
1130 | |
1131 | if (reply->type != DHCP6_REPLY) | |
ed6ee219 | 1132 | return 0; |
a34b57c0 PF |
1133 | |
1134 | r = dhcp6_lease_new(&lease); | |
1135 | if (r < 0) | |
1136 | return -ENOMEM; | |
1137 | ||
1138 | r = client_parse_message(client, reply, len, lease); | |
1139 | if (r < 0) | |
1140 | return r; | |
1141 | ||
ed6ee219 PF |
1142 | if (client->state == DHCP6_STATE_SOLICITATION) { |
1143 | r = dhcp6_lease_get_rapid_commit(lease, &rapid_commit); | |
1144 | if (r < 0) | |
1145 | return r; | |
1146 | ||
1147 | if (!rapid_commit) | |
1148 | return 0; | |
1149 | } | |
1150 | ||
431a4bc8 YW |
1151 | sd_dhcp6_lease_unref(client->lease); |
1152 | client->lease = TAKE_PTR(lease); | |
a34b57c0 PF |
1153 | |
1154 | return DHCP6_STATE_BOUND; | |
1155 | } | |
1156 | ||
0ae0e5cd | 1157 | static int client_receive_advertise(sd_dhcp6_client *client, DHCP6Message *advertise, size_t len) { |
4afd3348 | 1158 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
631bbe71 | 1159 | uint8_t pref_advertise = 0, pref_lease = 0; |
a1140666 | 1160 | int r; |
631bbe71 PF |
1161 | |
1162 | if (advertise->type != DHCP6_ADVERTISE) | |
ed6ee219 | 1163 | return 0; |
631bbe71 PF |
1164 | |
1165 | r = dhcp6_lease_new(&lease); | |
1166 | if (r < 0) | |
1167 | return r; | |
1168 | ||
1169 | r = client_parse_message(client, advertise, len, lease); | |
1170 | if (r < 0) | |
1171 | return r; | |
1172 | ||
1173 | r = dhcp6_lease_get_preference(lease, &pref_advertise); | |
1174 | if (r < 0) | |
1175 | return r; | |
1176 | ||
1177 | r = dhcp6_lease_get_preference(client->lease, &pref_lease); | |
bbfa43ca PF |
1178 | |
1179 | if (r < 0 || pref_advertise > pref_lease) { | |
431a4bc8 YW |
1180 | sd_dhcp6_lease_unref(client->lease); |
1181 | client->lease = TAKE_PTR(lease); | |
631bbe71 PF |
1182 | r = 0; |
1183 | } | |
1184 | ||
7246333c PF |
1185 | if (pref_advertise == 255 || client->retransmit_count > 1) |
1186 | r = DHCP6_STATE_REQUEST; | |
1187 | ||
631bbe71 PF |
1188 | return r; |
1189 | } | |
1190 | ||
004845d1 LP |
1191 | static int client_receive_message( |
1192 | sd_event_source *s, | |
1193 | int fd, uint32_t | |
1194 | revents, | |
1195 | void *userdata) { | |
1196 | ||
631bbe71 | 1197 | sd_dhcp6_client *client = userdata; |
3f0c075f | 1198 | DHCP6_CLIENT_DONT_DESTROY(client); |
0d43d2fc | 1199 | _cleanup_free_ DHCP6Message *message = NULL; |
4edc2c9b LP |
1200 | ssize_t buflen, len; |
1201 | int r = 0; | |
631bbe71 PF |
1202 | |
1203 | assert(s); | |
1204 | assert(client); | |
1205 | assert(client->event); | |
1206 | ||
4edc2c9b | 1207 | buflen = next_datagram_size_fd(fd); |
22a3fd2d BG |
1208 | if (buflen == -ENETDOWN) { |
1209 | /* the link is down. Don't return an error or the I/O event | |
1210 | source will be disconnected and we won't be able to receive | |
1211 | packets again when the link comes back. */ | |
1212 | return 0; | |
1213 | } | |
4edc2c9b LP |
1214 | if (buflen < 0) |
1215 | return buflen; | |
631bbe71 | 1216 | |
0d43d2fc | 1217 | message = malloc(buflen); |
631bbe71 PF |
1218 | if (!message) |
1219 | return -ENOMEM; | |
1220 | ||
cf447cb6 | 1221 | len = recv(fd, message, buflen, 0); |
0d43d2fc | 1222 | if (len < 0) { |
22a3fd2d BG |
1223 | /* see comment above for why we shouldn't error out on ENETDOWN. */ |
1224 | if (IN_SET(errno, EAGAIN, EINTR, ENETDOWN)) | |
0d43d2fc TG |
1225 | return 0; |
1226 | ||
bd9a7221 | 1227 | return log_dhcp6_client_errno(client, errno, "Could not receive message from UDP socket: %m"); |
0d43d2fc | 1228 | |
004845d1 LP |
1229 | } |
1230 | if ((size_t) len < sizeof(DHCP6Message)) { | |
1231 | log_dhcp6_client(client, "Too small to be DHCP6 message: ignoring"); | |
631bbe71 | 1232 | return 0; |
004845d1 | 1233 | } |
631bbe71 PF |
1234 | |
1235 | switch(message->type) { | |
1236 | case DHCP6_SOLICIT: | |
1237 | case DHCP6_REQUEST: | |
1238 | case DHCP6_CONFIRM: | |
1239 | case DHCP6_RENEW: | |
1240 | case DHCP6_REBIND: | |
1241 | case DHCP6_RELEASE: | |
1242 | case DHCP6_DECLINE: | |
1243 | case DHCP6_INFORMATION_REQUEST: | |
1244 | case DHCP6_RELAY_FORW: | |
1245 | case DHCP6_RELAY_REPL: | |
1246 | return 0; | |
1247 | ||
1248 | case DHCP6_ADVERTISE: | |
1249 | case DHCP6_REPLY: | |
1250 | case DHCP6_RECONFIGURE: | |
1251 | break; | |
1252 | ||
1253 | default: | |
bd9a7221 | 1254 | log_dhcp6_client(client, "Unknown message type %d", message->type); |
631bbe71 PF |
1255 | return 0; |
1256 | } | |
1257 | ||
1258 | if (client->transaction_id != (message->transaction_id & | |
1259 | htobe32(0x00ffffff))) | |
1260 | return 0; | |
1261 | ||
1262 | switch (client->state) { | |
bbfa43ca PF |
1263 | case DHCP6_STATE_INFORMATION_REQUEST: |
1264 | r = client_receive_reply(client, message, len); | |
1265 | if (r < 0) | |
1266 | return 0; | |
1267 | ||
10c9ce61 | 1268 | client_notify(client, SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST); |
bbfa43ca PF |
1269 | |
1270 | client_start(client, DHCP6_STATE_STOPPED); | |
1271 | ||
1272 | break; | |
1273 | ||
631bbe71 PF |
1274 | case DHCP6_STATE_SOLICITATION: |
1275 | r = client_receive_advertise(client, message, len); | |
1276 | ||
ed6ee219 | 1277 | if (r == DHCP6_STATE_REQUEST) { |
7246333c PF |
1278 | client_start(client, r); |
1279 | ||
ed6ee219 PF |
1280 | break; |
1281 | } | |
631bbe71 | 1282 | |
4831981d | 1283 | _fallthrough_; /* for Soliciation Rapid Commit option check */ |
7246333c | 1284 | case DHCP6_STATE_REQUEST: |
3dc34fcc PF |
1285 | case DHCP6_STATE_RENEW: |
1286 | case DHCP6_STATE_REBIND: | |
1287 | ||
a34b57c0 PF |
1288 | r = client_receive_reply(client, message, len); |
1289 | if (r < 0) | |
1290 | return 0; | |
1291 | ||
1292 | if (r == DHCP6_STATE_BOUND) { | |
1293 | ||
1294 | r = client_start(client, DHCP6_STATE_BOUND); | |
1295 | if (r < 0) { | |
1296 | client_stop(client, r); | |
1297 | return 0; | |
1298 | } | |
1299 | ||
10c9ce61 | 1300 | client_notify(client, SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE); |
a34b57c0 PF |
1301 | } |
1302 | ||
1303 | break; | |
1304 | ||
1305 | case DHCP6_STATE_BOUND: | |
1306 | ||
1307 | break; | |
1308 | ||
631bbe71 | 1309 | case DHCP6_STATE_STOPPED: |
631bbe71 PF |
1310 | return 0; |
1311 | } | |
1312 | ||
712fdfd6 YW |
1313 | log_dhcp6_client(client, "Recv %s", |
1314 | dhcp6_message_type_to_string(message->type)); | |
631bbe71 | 1315 | |
a9aff361 PF |
1316 | return 0; |
1317 | } | |
1318 | ||
134ebaa4 PF |
1319 | static int client_get_lifetime(sd_dhcp6_client *client, uint32_t *lifetime_t1, |
1320 | uint32_t *lifetime_t2) { | |
1321 | assert_return(client, -EINVAL); | |
1322 | assert_return(client->lease, -EINVAL); | |
1323 | ||
1324 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA) && client->lease->ia.addresses) { | |
1325 | *lifetime_t1 = be32toh(client->lease->ia.ia_na.lifetime_t1); | |
1326 | *lifetime_t2 = be32toh(client->lease->ia.ia_na.lifetime_t2); | |
1327 | ||
1328 | return 0; | |
1329 | } | |
1330 | ||
1331 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD) && client->lease->pd.addresses) { | |
1332 | *lifetime_t1 = be32toh(client->lease->pd.ia_pd.lifetime_t1); | |
1333 | *lifetime_t2 = be32toh(client->lease->pd.ia_pd.lifetime_t2); | |
1334 | ||
1335 | return 0; | |
1336 | } | |
1337 | ||
1338 | return -ENOMSG; | |
1339 | } | |
1340 | ||
0ae0e5cd | 1341 | static int client_start(sd_dhcp6_client *client, enum DHCP6State state) { |
f12abb48 | 1342 | int r; |
a34b57c0 PF |
1343 | usec_t timeout, time_now; |
1344 | char time_string[FORMAT_TIMESPAN_MAX]; | |
134ebaa4 | 1345 | uint32_t lifetime_t1, lifetime_t2; |
f12abb48 PF |
1346 | |
1347 | assert_return(client, -EINVAL); | |
1348 | assert_return(client->event, -EINVAL); | |
2f8e7633 | 1349 | assert_return(client->ifindex > 0, -EINVAL); |
c3e2adea | 1350 | assert_return(client->state != state, -EINVAL); |
f12abb48 | 1351 | |
c9393e8c YW |
1352 | (void) event_source_disable(client->timeout_resend_expire); |
1353 | (void) event_source_disable(client->timeout_resend); | |
c3e2adea PF |
1354 | client->retransmit_time = 0; |
1355 | client->retransmit_count = 0; | |
f12abb48 | 1356 | |
38a03f06 LP |
1357 | r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now); |
1358 | if (r < 0) | |
1359 | return r; | |
346e13a2 | 1360 | |
7ac6c26a PF |
1361 | if (!client->receive_message) { |
1362 | r = sd_event_add_io(client->event, &client->receive_message, | |
1363 | client->fd, EPOLLIN, client_receive_message, | |
1364 | client); | |
1365 | if (r < 0) | |
1366 | goto error; | |
1367 | ||
1368 | r = sd_event_source_set_priority(client->receive_message, | |
1369 | client->event_priority); | |
1370 | if (r < 0) | |
1371 | goto error; | |
1372 | ||
1373 | r = sd_event_source_set_description(client->receive_message, | |
1374 | "dhcp6-receive-message"); | |
1375 | if (r < 0) | |
1376 | goto error; | |
1377 | } | |
1378 | ||
c3e2adea PF |
1379 | switch (state) { |
1380 | case DHCP6_STATE_STOPPED: | |
bbfa43ca PF |
1381 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { |
1382 | client->state = DHCP6_STATE_STOPPED; | |
a9aff361 | 1383 | |
bbfa43ca PF |
1384 | return 0; |
1385 | } | |
9021bb9f | 1386 | |
4831981d | 1387 | _fallthrough_; |
bbfa43ca | 1388 | case DHCP6_STATE_SOLICITATION: |
c3e2adea PF |
1389 | client->state = DHCP6_STATE_SOLICITATION; |
1390 | ||
7246333c PF |
1391 | break; |
1392 | ||
bbfa43ca | 1393 | case DHCP6_STATE_INFORMATION_REQUEST: |
7246333c | 1394 | case DHCP6_STATE_REQUEST: |
3dc34fcc PF |
1395 | case DHCP6_STATE_RENEW: |
1396 | case DHCP6_STATE_REBIND: | |
a34b57c0 | 1397 | |
7246333c PF |
1398 | client->state = state; |
1399 | ||
c3e2adea | 1400 | break; |
a34b57c0 PF |
1401 | |
1402 | case DHCP6_STATE_BOUND: | |
1403 | ||
134ebaa4 PF |
1404 | r = client_get_lifetime(client, &lifetime_t1, &lifetime_t2); |
1405 | if (r < 0) | |
1406 | goto error; | |
a34b57c0 | 1407 | |
134ebaa4 | 1408 | if (lifetime_t1 == 0xffffffff || lifetime_t2 == 0xffffffff) { |
bd9a7221 | 1409 | log_dhcp6_client(client, "Infinite T1 0x%08x or T2 0x%08x", |
134ebaa4 | 1410 | lifetime_t1, lifetime_t2); |
a34b57c0 PF |
1411 | |
1412 | return 0; | |
1413 | } | |
1414 | ||
134ebaa4 | 1415 | timeout = client_timeout_compute_random(lifetime_t1 * USEC_PER_SEC); |
a34b57c0 PF |
1416 | |
1417 | log_dhcp6_client(client, "T1 expires in %s", | |
ed19c567 | 1418 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC)); |
a34b57c0 | 1419 | |
c9393e8c YW |
1420 | r = event_reset_time(client->event, &client->timeout_t1, |
1421 | clock_boottime_or_monotonic(), | |
1422 | time_now + timeout, 10 * USEC_PER_SEC, | |
1423 | client_timeout_t1, client, | |
1424 | client->event_priority, "dhcp6-t1-timeout", true); | |
9021bb9f | 1425 | if (r < 0) |
7ac6c26a | 1426 | goto error; |
9021bb9f | 1427 | |
134ebaa4 | 1428 | timeout = client_timeout_compute_random(lifetime_t2 * USEC_PER_SEC); |
a34b57c0 PF |
1429 | |
1430 | log_dhcp6_client(client, "T2 expires in %s", | |
ed19c567 | 1431 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC)); |
a34b57c0 | 1432 | |
c9393e8c YW |
1433 | r = event_reset_time(client->event, &client->timeout_t2, |
1434 | clock_boottime_or_monotonic(), | |
1435 | time_now + timeout, 10 * USEC_PER_SEC, | |
1436 | client_timeout_t2, client, | |
1437 | client->event_priority, "dhcp6-t2-timeout", true); | |
9021bb9f | 1438 | if (r < 0) |
7ac6c26a | 1439 | goto error; |
9021bb9f | 1440 | |
3dc34fcc PF |
1441 | client->state = state; |
1442 | ||
a34b57c0 | 1443 | return 0; |
c3e2adea | 1444 | } |
a9aff361 | 1445 | |
c3e2adea | 1446 | client->transaction_id = random_u32() & htobe32(0x00ffffff); |
346e13a2 | 1447 | client->transaction_start = time_now; |
d1b0afe3 | 1448 | |
c9393e8c YW |
1449 | r = event_reset_time(client->event, &client->timeout_resend, |
1450 | clock_boottime_or_monotonic(), | |
1451 | 0, 0, | |
1452 | client_timeout_resend, client, | |
1453 | client->event_priority, "dhcp6-resend-timeout", true); | |
9021bb9f | 1454 | if (r < 0) |
7ac6c26a | 1455 | goto error; |
9021bb9f | 1456 | |
f12abb48 | 1457 | return 0; |
7ac6c26a PF |
1458 | |
1459 | error: | |
1460 | client_reset(client); | |
1461 | return r; | |
f12abb48 PF |
1462 | } |
1463 | ||
0ae0e5cd | 1464 | int sd_dhcp6_client_stop(sd_dhcp6_client *client) { |
f667c150 TG |
1465 | assert_return(client, -EINVAL); |
1466 | ||
10c9ce61 | 1467 | client_stop(client, SD_DHCP6_CLIENT_EVENT_STOP); |
139b011a | 1468 | |
7ac6c26a PF |
1469 | client->fd = safe_close(client->fd); |
1470 | ||
139b011a PF |
1471 | return 0; |
1472 | } | |
1473 | ||
f667c150 TG |
1474 | int sd_dhcp6_client_is_running(sd_dhcp6_client *client) { |
1475 | assert_return(client, -EINVAL); | |
1476 | ||
1477 | return client->state != DHCP6_STATE_STOPPED; | |
1478 | } | |
1479 | ||
0ae0e5cd | 1480 | int sd_dhcp6_client_start(sd_dhcp6_client *client) { |
bbfa43ca | 1481 | enum DHCP6State state = DHCP6_STATE_SOLICITATION; |
2f8e7633 | 1482 | int r = 0; |
139b011a PF |
1483 | |
1484 | assert_return(client, -EINVAL); | |
1485 | assert_return(client->event, -EINVAL); | |
2f8e7633 | 1486 | assert_return(client->ifindex > 0, -EINVAL); |
c601ebf7 | 1487 | assert_return(in_addr_is_link_local(AF_INET6, (const union in_addr_union *) &client->local_address) > 0, -EINVAL); |
139b011a | 1488 | |
d7c9c21f | 1489 | if (!IN_SET(client->state, DHCP6_STATE_STOPPED)) |
63348d13 | 1490 | return -EBUSY; |
d7c9c21f | 1491 | |
f311a62b PF |
1492 | if (!client->information_request && !client->request) |
1493 | return -EINVAL; | |
1494 | ||
c806ffb9 | 1495 | r = client_reset(client); |
f12abb48 PF |
1496 | if (r < 0) |
1497 | return r; | |
1498 | ||
bbfa43ca PF |
1499 | r = client_ensure_iaid(client); |
1500 | if (r < 0) | |
1501 | return r; | |
1502 | ||
cc22955c TH |
1503 | r = client_ensure_duid(client); |
1504 | if (r < 0) | |
1505 | return r; | |
1506 | ||
10a0f27b PF |
1507 | if (client->fd < 0) { |
1508 | r = dhcp6_network_bind_udp_socket(client->ifindex, &client->local_address); | |
1509 | if (r < 0) { | |
1510 | _cleanup_free_ char *p = NULL; | |
1511 | ||
1512 | (void) in_addr_to_string(AF_INET6, (const union in_addr_union*) &client->local_address, &p); | |
1513 | return log_dhcp6_client_errno(client, r, | |
1514 | "Failed to bind to UDP socket at address %s: %m", strna(p)); | |
1515 | } | |
bd9a7221 | 1516 | |
10a0f27b | 1517 | client->fd = r; |
bd9a7221 | 1518 | } |
bbfa43ca | 1519 | |
fcb51238 YW |
1520 | if (client->information_request) { |
1521 | usec_t t = now(CLOCK_MONOTONIC); | |
1522 | ||
1523 | if (t < usec_add(client->information_request_time_usec, client->information_refresh_time_usec)) | |
1524 | return 0; | |
1525 | ||
1526 | client->information_request_time_usec = t; | |
bbfa43ca | 1527 | state = DHCP6_STATE_INFORMATION_REQUEST; |
fcb51238 | 1528 | } |
bbfa43ca PF |
1529 | |
1530 | log_dhcp6_client(client, "Started in %s mode", | |
483d099e ZJS |
1531 | client->information_request? "Information request": |
1532 | "Managed"); | |
bbfa43ca PF |
1533 | |
1534 | return client_start(client, state); | |
139b011a PF |
1535 | } |
1536 | ||
32d20645 | 1537 | int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event, int64_t priority) { |
139b011a PF |
1538 | int r; |
1539 | ||
1540 | assert_return(client, -EINVAL); | |
1541 | assert_return(!client->event, -EBUSY); | |
1542 | ||
1543 | if (event) | |
1544 | client->event = sd_event_ref(event); | |
1545 | else { | |
1546 | r = sd_event_default(&client->event); | |
1547 | if (r < 0) | |
1548 | return 0; | |
1549 | } | |
1550 | ||
1551 | client->event_priority = priority; | |
1552 | ||
1553 | return 0; | |
1554 | } | |
1555 | ||
1556 | int sd_dhcp6_client_detach_event(sd_dhcp6_client *client) { | |
1557 | assert_return(client, -EINVAL); | |
1558 | ||
1559 | client->event = sd_event_unref(client->event); | |
1560 | ||
1561 | return 0; | |
1562 | } | |
1563 | ||
1564 | sd_event *sd_dhcp6_client_get_event(sd_dhcp6_client *client) { | |
a1140666 | 1565 | assert_return(client, NULL); |
139b011a PF |
1566 | |
1567 | return client->event; | |
1568 | } | |
1569 | ||
8301aa0b YW |
1570 | static sd_dhcp6_client *dhcp6_client_free(sd_dhcp6_client *client) { |
1571 | assert(client); | |
139b011a | 1572 | |
c9393e8c YW |
1573 | client->timeout_resend = sd_event_source_unref(client->timeout_resend); |
1574 | client->timeout_resend_expire = sd_event_source_unref(client->timeout_resend_expire); | |
1575 | client->timeout_t1 = sd_event_source_unref(client->timeout_t1); | |
1576 | client->timeout_t2 = sd_event_source_unref(client->timeout_t2); | |
1577 | ||
3733eec3 LP |
1578 | client_reset(client); |
1579 | ||
10a0f27b PF |
1580 | client->fd = safe_close(client->fd); |
1581 | ||
3733eec3 | 1582 | sd_dhcp6_client_detach_event(client); |
3733eec3 LP |
1583 | |
1584 | free(client->req_opts); | |
8006aa32 | 1585 | free(client->fqdn); |
de8d6e55 | 1586 | free(client->mudurl); |
6b430fdb | 1587 | return mfree(client); |
139b011a PF |
1588 | } |
1589 | ||
8301aa0b YW |
1590 | DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp6_client, sd_dhcp6_client, dhcp6_client_free); |
1591 | ||
0ae0e5cd | 1592 | int sd_dhcp6_client_new(sd_dhcp6_client **ret) { |
4afd3348 | 1593 | _cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL; |
8b8ecac8 | 1594 | _cleanup_free_ be16_t *req_opts = NULL; |
da6fe470 | 1595 | size_t t; |
139b011a PF |
1596 | |
1597 | assert_return(ret, -EINVAL); | |
1598 | ||
8b8ecac8 YW |
1599 | req_opts = new(be16_t, ELEMENTSOF(default_req_opts)); |
1600 | if (!req_opts) | |
139b011a PF |
1601 | return -ENOMEM; |
1602 | ||
8b8ecac8 YW |
1603 | for (t = 0; t < ELEMENTSOF(default_req_opts); t++) |
1604 | req_opts[t] = htobe16(default_req_opts[t]); | |
c806ffb9 | 1605 | |
8b8ecac8 YW |
1606 | client = new(sd_dhcp6_client, 1); |
1607 | if (!client) | |
da6fe470 PF |
1608 | return -ENOMEM; |
1609 | ||
8b8ecac8 YW |
1610 | *client = (sd_dhcp6_client) { |
1611 | .n_ref = 1, | |
1612 | .ia_na.type = SD_DHCP6_OPTION_IA_NA, | |
1613 | .ia_pd.type = SD_DHCP6_OPTION_IA_PD, | |
1614 | .ifindex = -1, | |
1615 | .request = DHCP6_REQUEST_IA_NA, | |
1616 | .fd = -1, | |
1617 | .req_opts_len = ELEMENTSOF(default_req_opts), | |
2805536b SS |
1618 | .hint_pd_prefix.iapdprefix.lifetime_preferred = (be32_t) -1, |
1619 | .hint_pd_prefix.iapdprefix.lifetime_valid = (be32_t) -1, | |
8b8ecac8 YW |
1620 | .req_opts = TAKE_PTR(req_opts), |
1621 | }; | |
da6fe470 | 1622 | |
1cc6c93a | 1623 | *ret = TAKE_PTR(client); |
139b011a PF |
1624 | |
1625 | return 0; | |
1626 | } |