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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
139b011a | 2 | /*** |
810adae9 | 3 | Copyright © 2014-2015 Intel Corporation. All rights reserved. |
139b011a PF |
4 | ***/ |
5 | ||
6 | #include <errno.h> | |
631bbe71 | 7 | #include <sys/ioctl.h> |
8f815e8b | 8 | #include <linux/if_arp.h> |
76253e73 | 9 | #include <linux/if_infiniband.h> |
139b011a | 10 | |
139b011a | 11 | #include "sd-dhcp6-client.h" |
07630cea | 12 | |
b5efdb8a | 13 | #include "alloc-util.h" |
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" |
6b7d5b6e | 21 | #include "hexdecoct.h" |
8006aa32 | 22 | #include "hostname-util.h" |
c601ebf7 | 23 | #include "in-addr-util.h" |
07630cea | 24 | #include "random-util.h" |
4edc2c9b | 25 | #include "socket-util.h" |
8b43440b | 26 | #include "string-table.h" |
7e19cc54 | 27 | #include "strv.h" |
07630cea | 28 | #include "util.h" |
de8d6e55 | 29 | #include "web-util.h" |
139b011a | 30 | |
76253e73 DW |
31 | #define MAX_MAC_ADDR_LEN INFINIBAND_ALEN |
32 | ||
6ffe71d0 YW |
33 | #define IRT_DEFAULT (1 * USEC_PER_DAY) |
34 | #define IRT_MINIMUM (600 * USEC_PER_SEC) | |
fcb51238 | 35 | |
f311a62b PF |
36 | /* what to request from the server, addresses (IA_NA) and/or prefixes (IA_PD) */ |
37 | enum { | |
38 | DHCP6_REQUEST_IA_NA = 1, | |
39 | DHCP6_REQUEST_IA_TA = 2, /* currently not used */ | |
40 | DHCP6_REQUEST_IA_PD = 4, | |
41 | }; | |
42 | ||
139b011a | 43 | struct sd_dhcp6_client { |
3733eec3 | 44 | unsigned n_ref; |
139b011a PF |
45 | |
46 | enum DHCP6State state; | |
47 | sd_event *event; | |
48 | int event_priority; | |
2f8e7633 | 49 | int ifindex; |
2805536b | 50 | DHCP6Address hint_pd_prefix; |
c601ebf7 | 51 | struct in6_addr local_address; |
76253e73 DW |
52 | uint8_t mac_addr[MAX_MAC_ADDR_LEN]; |
53 | size_t mac_addr_len; | |
54 | uint16_t arp_type; | |
f12abb48 | 55 | DHCP6IA ia_na; |
dce6563f | 56 | DHCP6IA ia_pd; |
9a7225de PF |
57 | sd_event_source *timeout_t1; |
58 | sd_event_source *timeout_t2; | |
1346489f | 59 | unsigned request; |
a9aff361 | 60 | be32_t transaction_id; |
346e13a2 | 61 | usec_t transaction_start; |
631bbe71 | 62 | struct sd_dhcp6_lease *lease; |
a9aff361 | 63 | int fd; |
bbfa43ca | 64 | bool information_request; |
8217ed5e | 65 | bool iaid_set; |
da6fe470 PF |
66 | be16_t *req_opts; |
67 | size_t req_opts_allocated; | |
68 | size_t req_opts_len; | |
8006aa32 | 69 | char *fqdn; |
de8d6e55 | 70 | char *mudurl; |
33923925 | 71 | char **user_class; |
73c8ced7 | 72 | char **vendor_class; |
a9aff361 | 73 | sd_event_source *receive_message; |
d1b0afe3 PF |
74 | usec_t retransmit_time; |
75 | uint8_t retransmit_count; | |
76 | sd_event_source *timeout_resend; | |
77 | sd_event_source *timeout_resend_expire; | |
45aa74c7 | 78 | sd_dhcp6_client_callback_t callback; |
139b011a | 79 | void *userdata; |
764aad62 | 80 | struct duid duid; |
66eac120 | 81 | size_t duid_len; |
fcb51238 YW |
82 | usec_t information_request_time_usec; |
83 | usec_t information_refresh_time_usec; | |
e7d5fe17 | 84 | OrderedHashmap *extra_options; |
99ccb8ff | 85 | OrderedHashmap *vendor_options; |
139b011a PF |
86 | }; |
87 | ||
da6fe470 | 88 | static const uint16_t default_req_opts[] = { |
2c1ab8ca BG |
89 | SD_DHCP6_OPTION_DNS_SERVERS, |
90 | SD_DHCP6_OPTION_DOMAIN_LIST, | |
91 | SD_DHCP6_OPTION_NTP_SERVER, | |
92 | SD_DHCP6_OPTION_SNTP_SERVERS, | |
da6fe470 PF |
93 | }; |
94 | ||
a9aff361 PF |
95 | const char * dhcp6_message_type_table[_DHCP6_MESSAGE_MAX] = { |
96 | [DHCP6_SOLICIT] = "SOLICIT", | |
97 | [DHCP6_ADVERTISE] = "ADVERTISE", | |
98 | [DHCP6_REQUEST] = "REQUEST", | |
99 | [DHCP6_CONFIRM] = "CONFIRM", | |
100 | [DHCP6_RENEW] = "RENEW", | |
101 | [DHCP6_REBIND] = "REBIND", | |
102 | [DHCP6_REPLY] = "REPLY", | |
103 | [DHCP6_RELEASE] = "RELEASE", | |
104 | [DHCP6_DECLINE] = "DECLINE", | |
105 | [DHCP6_RECONFIGURE] = "RECONFIGURE", | |
106 | [DHCP6_INFORMATION_REQUEST] = "INFORMATION-REQUEST", | |
107 | [DHCP6_RELAY_FORW] = "RELAY-FORW", | |
108 | [DHCP6_RELAY_REPL] = "RELAY-REPL", | |
109 | }; | |
110 | ||
111 | DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_type, int); | |
112 | ||
631bbe71 | 113 | const char * dhcp6_message_status_table[_DHCP6_STATUS_MAX] = { |
76643fed SS |
114 | [DHCP6_STATUS_SUCCESS] = "Success", |
115 | [DHCP6_STATUS_UNSPEC_FAIL] = "Unspecified failure", | |
116 | [DHCP6_STATUS_NO_ADDRS_AVAIL] = "No addresses available", | |
117 | [DHCP6_STATUS_NO_BINDING] = "Binding unavailable", | |
118 | [DHCP6_STATUS_NOT_ON_LINK] = "Not on link", | |
119 | [DHCP6_STATUS_USE_MULTICAST] = "Use multicast", | |
120 | [DHCP6_STATUS_NO_PREFIX_AVAIL] = "No prefix available", | |
121 | [DHCP6_STATUS_UNKNOWN_QUERY_TYPE] = "Unknown query type", | |
122 | [DHCP6_STATUS_MALFORMED_QUERY] = "Malformed query", | |
123 | [DHCP6_STATUS_NOT_CONFIGURED] = "Not configured", | |
124 | [DHCP6_STATUS_NOT_ALLOWED] = "Not allowed", | |
125 | [DHCP6_STATUS_QUERY_TERMINATED] = "Query terminated", | |
126 | [DHCP6_STATUS_DATA_MISSING] = "Data missing", | |
127 | [DHCP6_STATUS_CATCHUP_COMPLETE] = "Catch up complete", | |
128 | [DHCP6_STATUS_NOT_SUPPORTED] = "Not supported", | |
129 | [DHCP6_STATUS_TLS_CONNECTION_REFUSED] = "TLS connection refused", | |
130 | [DHCP6_STATUS_ADDRESS_IN_USE] = "Address in use", | |
131 | [DHCP6_STATUS_CONFIGURATION_CONFLICT] = "Configuration conflict", | |
132 | [DHCP6_STATUS_MISSING_BINDING_INFORMATION] = "Missing binding information", | |
133 | [DHCP6_STATUS_OUTDATED_BINDING_INFORMATION] = "Outdated binding information", | |
134 | [DHCP6_STATUS_SERVER_SHUTTING_DOWN] = "Server shutting down", | |
135 | [DHCP6_STATUS_DNS_UPDATE_NOT_SUPPORTED] = "DNS update not supported", | |
136 | [DHCP6_STATUS_EXCESSIVE_TIME_SKEW] = "Excessive time skew", | |
631bbe71 PF |
137 | }; |
138 | ||
139 | DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_status, int); | |
140 | ||
3f0c075f | 141 | #define DHCP6_CLIENT_DONT_DESTROY(client) \ |
4afd3348 | 142 | _cleanup_(sd_dhcp6_client_unrefp) _unused_ sd_dhcp6_client *_dont_destroy_##client = sd_dhcp6_client_ref(client) |
3f0c075f | 143 | |
c3e2adea PF |
144 | static int client_start(sd_dhcp6_client *client, enum DHCP6State state); |
145 | ||
4b558378 ZJS |
146 | int sd_dhcp6_client_set_callback( |
147 | sd_dhcp6_client *client, | |
148 | sd_dhcp6_client_callback_t cb, | |
149 | void *userdata) { | |
45aa74c7 | 150 | |
139b011a PF |
151 | assert_return(client, -EINVAL); |
152 | ||
45aa74c7 | 153 | client->callback = cb; |
139b011a PF |
154 | client->userdata = userdata; |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
2f8e7633 | 159 | int sd_dhcp6_client_set_ifindex(sd_dhcp6_client *client, int ifindex) { |
2f8e7633 | 160 | assert_return(client, -EINVAL); |
7fa69c0a | 161 | assert_return(ifindex > 0, -EINVAL); |
d7c9c21f PF |
162 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
163 | ||
2f8e7633 | 164 | client->ifindex = ifindex; |
139b011a PF |
165 | return 0; |
166 | } | |
167 | ||
4b558378 ZJS |
168 | int sd_dhcp6_client_set_local_address( |
169 | sd_dhcp6_client *client, | |
170 | const struct in6_addr *local_address) { | |
171 | ||
c601ebf7 TG |
172 | assert_return(client, -EINVAL); |
173 | assert_return(local_address, -EINVAL); | |
94876904 | 174 | assert_return(in6_addr_is_link_local(local_address) > 0, -EINVAL); |
c601ebf7 TG |
175 | |
176 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); | |
177 | ||
178 | client->local_address = *local_address; | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
0ae0e5cd LP |
183 | int sd_dhcp6_client_set_mac( |
184 | sd_dhcp6_client *client, | |
185 | const uint8_t *addr, size_t addr_len, | |
186 | uint16_t arp_type) { | |
187 | ||
139b011a | 188 | assert_return(client, -EINVAL); |
76253e73 | 189 | assert_return(addr, -EINVAL); |
1d370b2c | 190 | assert_return(addr_len <= MAX_MAC_ADDR_LEN, -EINVAL); |
76253e73 | 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); | |
1d370b2c JT |
198 | else { |
199 | client->arp_type = ARPHRD_NONE; | |
200 | client->mac_addr_len = 0; | |
201 | return 0; | |
202 | } | |
76253e73 DW |
203 | |
204 | if (client->mac_addr_len == addr_len && | |
205 | memcmp(&client->mac_addr, addr, addr_len) == 0) | |
206 | return 0; | |
207 | ||
208 | memcpy(&client->mac_addr, addr, addr_len); | |
209 | client->mac_addr_len = addr_len; | |
210 | client->arp_type = arp_type; | |
139b011a PF |
211 | |
212 | return 0; | |
213 | } | |
214 | ||
2805536b SS |
215 | int sd_dhcp6_client_set_prefix_delegation_hint( |
216 | sd_dhcp6_client *client, | |
217 | uint8_t prefixlen, | |
218 | const struct in6_addr *pd_address) { | |
219 | ||
220 | assert_return(client, -EINVAL); | |
221 | assert_return(pd_address, -EINVAL); | |
222 | ||
223 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); | |
224 | ||
225 | client->hint_pd_prefix.iapdprefix.address = *pd_address; | |
226 | client->hint_pd_prefix.iapdprefix.prefixlen = prefixlen; | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
99ccb8ff SS |
231 | int sd_dhcp6_client_add_vendor_option(sd_dhcp6_client *client, sd_dhcp6_option *v) { |
232 | int r; | |
233 | ||
234 | assert_return(client, -EINVAL); | |
235 | assert_return(v, -EINVAL); | |
236 | ||
02288f3e | 237 | r = ordered_hashmap_ensure_put(&client->vendor_options, &dhcp6_option_hash_ops, v, v); |
99ccb8ff SS |
238 | if (r < 0) |
239 | return r; | |
240 | ||
241 | sd_dhcp6_option_ref(v); | |
242 | ||
243 | return 1; | |
244 | } | |
245 | ||
0ae0e5cd | 246 | static int client_ensure_duid(sd_dhcp6_client *client) { |
cc22955c TH |
247 | if (client->duid_len != 0) |
248 | return 0; | |
0ae0e5cd | 249 | |
cc22955c TH |
250 | return dhcp_identifier_set_duid_en(&client->duid, &client->duid_len); |
251 | } | |
252 | ||
d7df2fd3 ZJS |
253 | /** |
254 | * Sets DUID. If duid is non-null, the DUID is set to duid_type + duid | |
255 | * without further modification. Otherwise, if duid_type is supported, DUID | |
256 | * is set based on that type. Otherwise, an error is returned. | |
257 | */ | |
7e90a499 | 258 | static int dhcp6_client_set_duid_internal( |
4b558378 ZJS |
259 | sd_dhcp6_client *client, |
260 | uint16_t duid_type, | |
f7a92d1a | 261 | const void *duid, |
7e90a499 YW |
262 | size_t duid_len, |
263 | usec_t llt_time) { | |
413708d1 | 264 | int r; |
27eba50e | 265 | |
66eac120 | 266 | assert_return(client, -EINVAL); |
d7df2fd3 | 267 | assert_return(duid_len == 0 || duid != NULL, -EINVAL); |
afec4539 | 268 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
c83321e6 | 269 | |
1d6cc5d0 | 270 | if (duid) { |
ab4a88bc TH |
271 | r = dhcp_validate_duid_len(duid_type, duid_len, true); |
272 | if (r < 0) { | |
273 | r = dhcp_validate_duid_len(duid_type, duid_len, false); | |
274 | if (r < 0) | |
a339859f | 275 | return log_dhcp6_client_errno(client, r, "Failed to validate length of DUID: %m"); |
01bcea49 LP |
276 | |
277 | log_dhcp6_client(client, "Using DUID of type %u of incorrect length, proceeding.", duid_type); | |
ab4a88bc | 278 | } |
d7df2fd3 | 279 | |
413708d1 VK |
280 | client->duid.type = htobe16(duid_type); |
281 | memcpy(&client->duid.raw.data, duid, duid_len); | |
d7df2fd3 | 282 | client->duid_len = sizeof(client->duid.type) + duid_len; |
d7df2fd3 | 283 | } else |
27eba50e | 284 | switch (duid_type) { |
335f80a6 | 285 | case DUID_TYPE_LLT: |
339697f0 | 286 | if (client->mac_addr_len == 0) |
a339859f | 287 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EOPNOTSUPP), "Failed to set DUID-LLT, MAC address is not set."); |
335f80a6 | 288 | |
53253d9c | 289 | r = dhcp_identifier_set_duid_llt(&client->duid, llt_time, client->mac_addr, client->mac_addr_len, client->arp_type, &client->duid_len); |
335f80a6 | 290 | if (r < 0) |
a339859f | 291 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-LLT: %m"); |
335f80a6 | 292 | break; |
27eba50e YW |
293 | case DUID_TYPE_EN: |
294 | r = dhcp_identifier_set_duid_en(&client->duid, &client->duid_len); | |
295 | if (r < 0) | |
a339859f | 296 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-EN: %m"); |
27eba50e | 297 | break; |
335f80a6 | 298 | case DUID_TYPE_LL: |
339697f0 | 299 | if (client->mac_addr_len == 0) |
a339859f | 300 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EOPNOTSUPP), "Failed to set DUID-LL, MAC address is not set."); |
335f80a6 YW |
301 | |
302 | r = dhcp_identifier_set_duid_ll(&client->duid, client->mac_addr, client->mac_addr_len, client->arp_type, &client->duid_len); | |
303 | if (r < 0) | |
a339859f | 304 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-LL: %m"); |
335f80a6 | 305 | break; |
27eba50e YW |
306 | case DUID_TYPE_UUID: |
307 | r = dhcp_identifier_set_duid_uuid(&client->duid, &client->duid_len); | |
308 | if (r < 0) | |
a339859f | 309 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-UUID: %m"); |
27eba50e YW |
310 | break; |
311 | default: | |
a339859f | 312 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EINVAL), "Invalid DUID type"); |
27eba50e | 313 | } |
fe4b2156 | 314 | |
413708d1 VK |
315 | return 0; |
316 | } | |
317 | ||
7e90a499 YW |
318 | int sd_dhcp6_client_set_duid( |
319 | sd_dhcp6_client *client, | |
320 | uint16_t duid_type, | |
321 | const void *duid, | |
322 | size_t duid_len) { | |
323 | return dhcp6_client_set_duid_internal(client, duid_type, duid, duid_len, 0); | |
324 | } | |
325 | ||
326 | int sd_dhcp6_client_set_duid_llt( | |
327 | sd_dhcp6_client *client, | |
328 | usec_t llt_time) { | |
329 | return dhcp6_client_set_duid_internal(client, DUID_TYPE_LLT, NULL, 0, llt_time); | |
330 | } | |
331 | ||
6b7d5b6e SS |
332 | static const char* const dhcp6_duid_type_table[_DUID_TYPE_MAX] = { |
333 | [DUID_TYPE_LLT] = "DUID-LLT", | |
334 | [DUID_TYPE_EN] = "DUID-EN/Vendor", | |
335 | [DUID_TYPE_LL] = "DUID-LL", | |
336 | [DUID_TYPE_UUID] = "UUID", | |
337 | }; | |
338 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(dhcp6_duid_type, DUIDType); | |
339 | ||
340 | int sd_dhcp6_client_duid_as_string( | |
341 | sd_dhcp6_client *client, | |
342 | char **duid) { | |
343 | _cleanup_free_ char *p = NULL, *s = NULL, *t = NULL; | |
344 | const char *v; | |
345 | int r; | |
346 | ||
347 | assert_return(client, -EINVAL); | |
348 | assert_return(client->duid_len > 0, -ENODATA); | |
361eb412 | 349 | assert_return(duid, -EINVAL); |
6b7d5b6e SS |
350 | |
351 | v = dhcp6_duid_type_to_string(be16toh(client->duid.type)); | |
352 | if (v) { | |
353 | s = strdup(v); | |
354 | if (!s) | |
355 | return -ENOMEM; | |
356 | } else { | |
357 | r = asprintf(&s, "%0x", client->duid.type); | |
358 | if (r < 0) | |
359 | return -ENOMEM; | |
360 | } | |
361 | ||
362 | t = hexmem(&client->duid.raw.data, client->duid_len); | |
363 | if (!t) | |
364 | return -ENOMEM; | |
365 | ||
366 | p = strjoin(s, ":", t); | |
367 | if (!p) | |
368 | return -ENOMEM; | |
369 | ||
370 | *duid = TAKE_PTR(p); | |
371 | ||
372 | return 0; | |
373 | } | |
374 | ||
413708d1 VK |
375 | int sd_dhcp6_client_set_iaid(sd_dhcp6_client *client, uint32_t iaid) { |
376 | assert_return(client, -EINVAL); | |
377 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); | |
378 | ||
e0026dcb | 379 | client->ia_na.ia_na.id = htobe32(iaid); |
dce6563f | 380 | client->ia_pd.ia_pd.id = htobe32(iaid); |
8217ed5e | 381 | client->iaid_set = true; |
66eac120 DW |
382 | |
383 | return 0; | |
384 | } | |
385 | ||
d69d4038 SS |
386 | int sd_dhcp6_client_get_iaid(sd_dhcp6_client *client, uint32_t *iaid) { |
387 | assert_return(client, -EINVAL); | |
388 | assert_return(iaid, -EINVAL); | |
389 | ||
390 | if (!client->iaid_set) | |
391 | return -ENODATA; | |
392 | ||
393 | *iaid = be32toh(client->ia_na.ia_na.id); | |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
8006aa32 SA |
398 | int sd_dhcp6_client_set_fqdn( |
399 | sd_dhcp6_client *client, | |
400 | const char *fqdn) { | |
401 | ||
402 | assert_return(client, -EINVAL); | |
403 | ||
404 | /* Make sure FQDN qualifies as DNS and as Linux hostname */ | |
405 | if (fqdn && | |
52ef5dd7 | 406 | !(hostname_is_valid(fqdn, 0) && dns_name_is_valid(fqdn) > 0)) |
8006aa32 SA |
407 | return -EINVAL; |
408 | ||
409 | return free_and_strdup(&client->fqdn, fqdn); | |
410 | } | |
411 | ||
04c01369 | 412 | int sd_dhcp6_client_set_information_request(sd_dhcp6_client *client, int enabled) { |
bbfa43ca | 413 | assert_return(client, -EINVAL); |
d7c9c21f PF |
414 | assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY); |
415 | ||
bbfa43ca PF |
416 | client->information_request = enabled; |
417 | ||
418 | return 0; | |
419 | } | |
420 | ||
04c01369 | 421 | int sd_dhcp6_client_get_information_request(sd_dhcp6_client *client, int *enabled) { |
bbfa43ca PF |
422 | assert_return(client, -EINVAL); |
423 | assert_return(enabled, -EINVAL); | |
424 | ||
425 | *enabled = client->information_request; | |
426 | ||
427 | return 0; | |
428 | } | |
429 | ||
0ae0e5cd | 430 | int sd_dhcp6_client_set_request_option(sd_dhcp6_client *client, uint16_t option) { |
da6fe470 PF |
431 | size_t t; |
432 | ||
433 | assert_return(client, -EINVAL); | |
434 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
435 | ||
2d3adfa6 | 436 | if (option <= 0 || option >= UINT8_MAX) |
da6fe470 | 437 | return -EINVAL; |
da6fe470 PF |
438 | |
439 | for (t = 0; t < client->req_opts_len; t++) | |
440 | if (client->req_opts[t] == htobe16(option)) | |
441 | return -EEXIST; | |
442 | ||
443 | if (!GREEDY_REALLOC(client->req_opts, client->req_opts_allocated, | |
444 | client->req_opts_len + 1)) | |
445 | return -ENOMEM; | |
446 | ||
447 | client->req_opts[client->req_opts_len++] = htobe16(option); | |
448 | ||
449 | return 0; | |
450 | } | |
451 | ||
feb7d7a2 | 452 | int sd_dhcp6_client_set_request_mud_url(sd_dhcp6_client *client, const char *mudurl) { |
de8d6e55 SS |
453 | assert_return(client, -EINVAL); |
454 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
455 | assert_return(mudurl, -EINVAL); | |
2d3adfa6 | 456 | assert_return(strlen(mudurl) <= UINT8_MAX, -EINVAL); |
de8d6e55 SS |
457 | assert_return(http_url_is_valid(mudurl), -EINVAL); |
458 | ||
459 | return free_and_strdup(&client->mudurl, mudurl); | |
460 | } | |
461 | ||
5a99444e YW |
462 | int sd_dhcp6_client_set_request_user_class(sd_dhcp6_client *client, char * const *user_class) { |
463 | char * const *p; | |
464 | char **s; | |
33923925 SS |
465 | |
466 | assert_return(client, -EINVAL); | |
467 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
5a99444e | 468 | assert_return(!strv_isempty(user_class), -EINVAL); |
73c8ced7 | 469 | |
5a99444e YW |
470 | STRV_FOREACH(p, user_class) { |
471 | size_t len = strlen(*p); | |
33923925 | 472 | |
5a99444e YW |
473 | if (len > UINT16_MAX || len == 0) |
474 | return -EINVAL; | |
475 | } | |
33923925 | 476 | |
2d3adfa6 | 477 | s = strv_copy(user_class); |
33923925 SS |
478 | if (!s) |
479 | return -ENOMEM; | |
480 | ||
5a99444e | 481 | return strv_free_and_replace(client->user_class, s); |
33923925 SS |
482 | } |
483 | ||
019951ec YW |
484 | int sd_dhcp6_client_set_request_vendor_class(sd_dhcp6_client *client, char * const *vendor_class) { |
485 | char * const *p; | |
486 | char **s; | |
73c8ced7 SS |
487 | |
488 | assert_return(client, -EINVAL); | |
489 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
019951ec | 490 | assert_return(!strv_isempty(vendor_class), -EINVAL); |
73c8ced7 | 491 | |
019951ec YW |
492 | STRV_FOREACH(p, vendor_class) { |
493 | size_t len = strlen(*p); | |
494 | ||
495 | if (len > UINT16_MAX || len == 0) | |
496 | return -EINVAL; | |
497 | } | |
73c8ced7 SS |
498 | |
499 | s = strv_copy(vendor_class); | |
500 | if (!s) | |
501 | return -ENOMEM; | |
502 | ||
019951ec | 503 | return strv_free_and_replace(client->vendor_class, s); |
73c8ced7 SS |
504 | } |
505 | ||
d8c51121 PF |
506 | int sd_dhcp6_client_get_prefix_delegation(sd_dhcp6_client *client, int *delegation) { |
507 | assert_return(client, -EINVAL); | |
508 | assert_return(delegation, -EINVAL); | |
509 | ||
f311a62b | 510 | *delegation = FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD); |
d8c51121 PF |
511 | |
512 | return 0; | |
513 | } | |
514 | ||
515 | int sd_dhcp6_client_set_prefix_delegation(sd_dhcp6_client *client, int delegation) { | |
7c3de8f8 PF |
516 | assert_return(client, -EINVAL); |
517 | ||
f311a62b PF |
518 | SET_FLAG(client->request, DHCP6_REQUEST_IA_PD, delegation); |
519 | ||
520 | return 0; | |
521 | } | |
522 | ||
523 | int sd_dhcp6_client_get_address_request(sd_dhcp6_client *client, int *request) { | |
524 | assert_return(client, -EINVAL); | |
525 | assert_return(request, -EINVAL); | |
526 | ||
527 | *request = FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA); | |
528 | ||
529 | return 0; | |
530 | } | |
531 | ||
532 | int sd_dhcp6_client_set_address_request(sd_dhcp6_client *client, int request) { | |
533 | assert_return(client, -EINVAL); | |
534 | ||
535 | SET_FLAG(client->request, DHCP6_REQUEST_IA_NA, request); | |
7c3de8f8 PF |
536 | |
537 | return 0; | |
538 | } | |
539 | ||
b62f9008 | 540 | int sd_dhcp6_client_set_transaction_id(sd_dhcp6_client *client, uint32_t transaction_id) { |
d89a400e EV |
541 | assert_return(client, -EINVAL); |
542 | ||
543 | client->transaction_id = transaction_id; | |
544 | ||
545 | return 0; | |
546 | } | |
547 | ||
ea3b3a75 PF |
548 | int sd_dhcp6_client_get_lease(sd_dhcp6_client *client, sd_dhcp6_lease **ret) { |
549 | assert_return(client, -EINVAL); | |
ea3b3a75 PF |
550 | |
551 | if (!client->lease) | |
552 | return -ENOMSG; | |
553 | ||
3098562c TG |
554 | if (ret) |
555 | *ret = client->lease; | |
ea3b3a75 PF |
556 | |
557 | return 0; | |
558 | } | |
559 | ||
e7d5fe17 AD |
560 | int sd_dhcp6_client_add_option(sd_dhcp6_client *client, sd_dhcp6_option *v) { |
561 | int r; | |
562 | ||
563 | assert_return(client, -EINVAL); | |
564 | assert_return(v, -EINVAL); | |
565 | ||
02288f3e | 566 | r = ordered_hashmap_ensure_put(&client->extra_options, &dhcp6_option_hash_ops, UINT_TO_PTR(v->option), v); |
e7d5fe17 AD |
567 | if (r < 0) |
568 | return r; | |
569 | ||
570 | sd_dhcp6_option_ref(v); | |
571 | return 0; | |
572 | } | |
573 | ||
3f0c075f | 574 | static void client_notify(sd_dhcp6_client *client, int event) { |
45aa74c7 LP |
575 | assert(client); |
576 | ||
577 | if (client->callback) | |
578 | client->callback(client, event, client->userdata); | |
139b011a PF |
579 | } |
580 | ||
f8908727 | 581 | static int client_reset(sd_dhcp6_client *client) { |
a1140666 | 582 | assert(client); |
f8908727 | 583 | |
431a4bc8 | 584 | client->lease = sd_dhcp6_lease_unref(client->lease); |
4e3e6679 | 585 | |
a9aff361 PF |
586 | client->receive_message = |
587 | sd_event_source_unref(client->receive_message); | |
588 | ||
c3e2adea | 589 | client->transaction_id = 0; |
346e13a2 | 590 | client->transaction_start = 0; |
a9aff361 | 591 | |
d1b0afe3 PF |
592 | client->retransmit_time = 0; |
593 | client->retransmit_count = 0; | |
d1b0afe3 | 594 | |
c9393e8c YW |
595 | (void) event_source_disable(client->timeout_resend); |
596 | (void) event_source_disable(client->timeout_resend_expire); | |
597 | (void) event_source_disable(client->timeout_t1); | |
598 | (void) event_source_disable(client->timeout_t2); | |
213e759a | 599 | |
139b011a PF |
600 | client->state = DHCP6_STATE_STOPPED; |
601 | ||
602 | return 0; | |
603 | } | |
604 | ||
3f0c075f PF |
605 | static void client_stop(sd_dhcp6_client *client, int error) { |
606 | DHCP6_CLIENT_DONT_DESTROY(client); | |
139b011a | 607 | |
3f0c075f | 608 | assert(client); |
139b011a | 609 | |
3f0c075f PF |
610 | client_notify(client, error); |
611 | ||
612 | client_reset(client); | |
139b011a PF |
613 | } |
614 | ||
346e13a2 | 615 | static int client_send_message(sd_dhcp6_client *client, usec_t time_now) { |
a9aff361 PF |
616 | _cleanup_free_ DHCP6Message *message = NULL; |
617 | struct in6_addr all_servers = | |
618 | IN6ADDR_ALL_DHCP6_RELAY_AGENTS_AND_SERVERS_INIT; | |
e7d5fe17 | 619 | struct sd_dhcp6_option *j; |
a9aff361 PF |
620 | size_t len, optlen = 512; |
621 | uint8_t *opt; | |
622 | int r; | |
346e13a2 PF |
623 | usec_t elapsed_usec; |
624 | be16_t elapsed_time; | |
a9aff361 | 625 | |
a1140666 LP |
626 | assert(client); |
627 | ||
a9aff361 PF |
628 | len = sizeof(DHCP6Message) + optlen; |
629 | ||
630 | message = malloc0(len); | |
631 | if (!message) | |
632 | return -ENOMEM; | |
633 | ||
634 | opt = (uint8_t *)(message + 1); | |
635 | ||
636 | message->transaction_id = client->transaction_id; | |
637 | ||
638 | switch(client->state) { | |
bbfa43ca PF |
639 | case DHCP6_STATE_INFORMATION_REQUEST: |
640 | message->type = DHCP6_INFORMATION_REQUEST; | |
641 | ||
de8d6e55 SS |
642 | if (client->mudurl) { |
643 | r = dhcp6_option_append(&opt, &optlen, | |
644 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
645 | client->mudurl); | |
646 | if (r < 0) | |
647 | return r; | |
648 | } | |
649 | ||
bbfa43ca PF |
650 | break; |
651 | ||
a9aff361 PF |
652 | case DHCP6_STATE_SOLICITATION: |
653 | message->type = DHCP6_SOLICIT; | |
654 | ||
ed6ee219 | 655 | r = dhcp6_option_append(&opt, &optlen, |
2c1ab8ca | 656 | SD_DHCP6_OPTION_RAPID_COMMIT, 0, NULL); |
926695f1 TA |
657 | if (r < 0) |
658 | return r; | |
ed6ee219 | 659 | |
f311a62b PF |
660 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
661 | r = dhcp6_option_append_ia(&opt, &optlen, | |
662 | &client->ia_na); | |
663 | if (r < 0) | |
664 | return r; | |
665 | } | |
a9aff361 | 666 | |
8006aa32 SA |
667 | if (client->fqdn) { |
668 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
669 | if (r < 0) | |
670 | return r; | |
671 | } | |
672 | ||
de8d6e55 SS |
673 | if (client->mudurl) { |
674 | r = dhcp6_option_append(&opt, &optlen, | |
675 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
676 | client->mudurl); | |
677 | if (r < 0) | |
678 | return r; | |
679 | } | |
680 | ||
33923925 SS |
681 | if (client->user_class) { |
682 | r = dhcp6_option_append_user_class(&opt, &optlen, client->user_class); | |
683 | if (r < 0) | |
684 | return r; | |
685 | } | |
686 | ||
73c8ced7 SS |
687 | if (client->vendor_class) { |
688 | r = dhcp6_option_append_vendor_class(&opt, &optlen, client->vendor_class); | |
689 | if (r < 0) | |
690 | return r; | |
691 | } | |
692 | ||
99ccb8ff SS |
693 | if (!ordered_hashmap_isempty(client->vendor_options)) { |
694 | r = dhcp6_option_append_vendor_option(&opt, &optlen, | |
695 | client->vendor_options); | |
696 | if (r < 0) | |
697 | return r; | |
698 | } | |
699 | ||
f311a62b | 700 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
73b49d43 | 701 | r = dhcp6_option_append_pd(&opt, &optlen, &client->ia_pd, &client->hint_pd_prefix); |
7c3de8f8 PF |
702 | if (r < 0) |
703 | return r; | |
7c3de8f8 PF |
704 | } |
705 | ||
7246333c PF |
706 | break; |
707 | ||
708 | case DHCP6_STATE_REQUEST: | |
3dc34fcc PF |
709 | case DHCP6_STATE_RENEW: |
710 | ||
711 | if (client->state == DHCP6_STATE_REQUEST) | |
712 | message->type = DHCP6_REQUEST; | |
713 | else | |
714 | message->type = DHCP6_RENEW; | |
7246333c | 715 | |
2c1ab8ca | 716 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_SERVERID, |
7246333c PF |
717 | client->lease->serverid_len, |
718 | client->lease->serverid); | |
719 | if (r < 0) | |
720 | return r; | |
721 | ||
26a63b81 | 722 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA) && client->lease->ia.addresses) { |
f311a62b PF |
723 | r = dhcp6_option_append_ia(&opt, &optlen, |
724 | &client->lease->ia); | |
725 | if (r < 0) | |
726 | return r; | |
727 | } | |
a9aff361 | 728 | |
8006aa32 SA |
729 | if (client->fqdn) { |
730 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
731 | if (r < 0) | |
732 | return r; | |
733 | } | |
734 | ||
de8d6e55 SS |
735 | if (client->mudurl) { |
736 | r = dhcp6_option_append(&opt, &optlen, | |
737 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
738 | client->mudurl); | |
739 | if (r < 0) | |
740 | return r; | |
741 | } | |
742 | ||
33923925 SS |
743 | if (client->user_class) { |
744 | r = dhcp6_option_append_user_class(&opt, &optlen, client->user_class); | |
745 | if (r < 0) | |
746 | return r; | |
747 | } | |
748 | ||
73c8ced7 SS |
749 | if (client->vendor_class) { |
750 | r = dhcp6_option_append_vendor_class(&opt, &optlen, client->vendor_class); | |
751 | if (r < 0) | |
752 | return r; | |
753 | } | |
754 | ||
99ccb8ff SS |
755 | if (!ordered_hashmap_isempty(client->vendor_options)) { |
756 | r = dhcp6_option_append_vendor_option(&opt, &optlen, client->vendor_options); | |
757 | if (r < 0) | |
758 | return r; | |
759 | } | |
760 | ||
26a63b81 | 761 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD) && client->lease->pd.addresses) { |
73b49d43 | 762 | r = dhcp6_option_append_pd(&opt, &optlen, &client->lease->pd, NULL); |
7c3de8f8 PF |
763 | if (r < 0) |
764 | return r; | |
7c3de8f8 PF |
765 | } |
766 | ||
a9aff361 PF |
767 | break; |
768 | ||
3dc34fcc PF |
769 | case DHCP6_STATE_REBIND: |
770 | message->type = DHCP6_REBIND; | |
771 | ||
f311a62b PF |
772 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
773 | r = dhcp6_option_append_ia(&opt, &optlen, &client->lease->ia); | |
774 | if (r < 0) | |
775 | return r; | |
776 | } | |
3dc34fcc | 777 | |
8006aa32 SA |
778 | if (client->fqdn) { |
779 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
780 | if (r < 0) | |
781 | return r; | |
782 | } | |
783 | ||
de8d6e55 SS |
784 | if (client->mudurl) { |
785 | r = dhcp6_option_append(&opt, &optlen, | |
786 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
787 | client->mudurl); | |
788 | if (r < 0) | |
789 | return r; | |
790 | } | |
791 | ||
33923925 SS |
792 | if (client->user_class) { |
793 | r = dhcp6_option_append_user_class(&opt, &optlen, client->user_class); | |
794 | if (r < 0) | |
795 | return r; | |
796 | } | |
797 | ||
73c8ced7 SS |
798 | if (client->vendor_class) { |
799 | r = dhcp6_option_append_vendor_class(&opt, &optlen, client->vendor_class); | |
800 | if (r < 0) | |
801 | return r; | |
802 | } | |
803 | ||
99ccb8ff SS |
804 | if (!ordered_hashmap_isempty(client->vendor_options)) { |
805 | r = dhcp6_option_append_vendor_option(&opt, &optlen, client->vendor_options); | |
806 | if (r < 0) | |
807 | return r; | |
808 | } | |
809 | ||
f311a62b | 810 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
73b49d43 | 811 | r = dhcp6_option_append_pd(&opt, &optlen, &client->lease->pd, NULL); |
7c3de8f8 PF |
812 | if (r < 0) |
813 | return r; | |
7c3de8f8 PF |
814 | } |
815 | ||
3dc34fcc PF |
816 | break; |
817 | ||
a9aff361 | 818 | case DHCP6_STATE_STOPPED: |
a34b57c0 | 819 | case DHCP6_STATE_BOUND: |
a9aff361 PF |
820 | return -EINVAL; |
821 | } | |
822 | ||
2c1ab8ca | 823 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ORO, |
da6fe470 PF |
824 | client->req_opts_len * sizeof(be16_t), |
825 | client->req_opts); | |
826 | if (r < 0) | |
827 | return r; | |
828 | ||
ccd1fc2f | 829 | assert(client->duid_len); |
2c1ab8ca | 830 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_CLIENTID, |
66eac120 | 831 | client->duid_len, &client->duid); |
7246333c PF |
832 | if (r < 0) |
833 | return r; | |
834 | ||
346e13a2 PF |
835 | elapsed_usec = time_now - client->transaction_start; |
836 | if (elapsed_usec < 0xffff * USEC_PER_MSEC * 10) | |
837 | elapsed_time = htobe16(elapsed_usec / USEC_PER_MSEC / 10); | |
838 | else | |
839 | elapsed_time = 0xffff; | |
840 | ||
2c1ab8ca | 841 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ELAPSED_TIME, |
346e13a2 PF |
842 | sizeof(elapsed_time), &elapsed_time); |
843 | if (r < 0) | |
844 | return r; | |
845 | ||
90e74a66 | 846 | ORDERED_HASHMAP_FOREACH(j, client->extra_options) { |
e7d5fe17 AD |
847 | r = dhcp6_option_append(&opt, &optlen, j->option, j->length, j->data); |
848 | if (r < 0) | |
849 | return r; | |
850 | } | |
851 | ||
a9aff361 PF |
852 | r = dhcp6_network_send_udp_socket(client->fd, &all_servers, message, |
853 | len - optlen); | |
854 | if (r < 0) | |
855 | return r; | |
856 | ||
857 | log_dhcp6_client(client, "Sent %s", | |
858 | dhcp6_message_type_to_string(message->type)); | |
859 | ||
860 | return 0; | |
861 | } | |
862 | ||
4b558378 | 863 | static int client_timeout_t2(sd_event_source *s, uint64_t usec, void *userdata) { |
a34b57c0 PF |
864 | sd_dhcp6_client *client = userdata; |
865 | ||
a1140666 LP |
866 | assert(s); |
867 | assert(client); | |
868 | assert(client->lease); | |
a34b57c0 | 869 | |
c9393e8c | 870 | (void) event_source_disable(client->timeout_t2); |
a34b57c0 PF |
871 | |
872 | log_dhcp6_client(client, "Timeout T2"); | |
873 | ||
3dc34fcc PF |
874 | client_start(client, DHCP6_STATE_REBIND); |
875 | ||
a34b57c0 PF |
876 | return 0; |
877 | } | |
878 | ||
4b558378 | 879 | static int client_timeout_t1(sd_event_source *s, uint64_t usec, void *userdata) { |
a34b57c0 PF |
880 | sd_dhcp6_client *client = userdata; |
881 | ||
a1140666 LP |
882 | assert(s); |
883 | assert(client); | |
884 | assert(client->lease); | |
a34b57c0 | 885 | |
c9393e8c | 886 | (void) event_source_disable(client->timeout_t1); |
a34b57c0 PF |
887 | |
888 | log_dhcp6_client(client, "Timeout T1"); | |
889 | ||
3dc34fcc PF |
890 | client_start(client, DHCP6_STATE_RENEW); |
891 | ||
a34b57c0 PF |
892 | return 0; |
893 | } | |
894 | ||
4b558378 | 895 | static int client_timeout_resend_expire(sd_event_source *s, uint64_t usec, void *userdata) { |
d1b0afe3 | 896 | sd_dhcp6_client *client = userdata; |
3dc34fcc PF |
897 | DHCP6_CLIENT_DONT_DESTROY(client); |
898 | enum DHCP6State state; | |
d1b0afe3 PF |
899 | |
900 | assert(s); | |
901 | assert(client); | |
902 | assert(client->event); | |
903 | ||
3dc34fcc PF |
904 | state = client->state; |
905 | ||
10c9ce61 | 906 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE); |
d1b0afe3 | 907 | |
3dc34fcc PF |
908 | /* RFC 3315, section 18.1.4., says that "...the client may choose to |
909 | use a Solicit message to locate a new DHCP server..." */ | |
910 | if (state == DHCP6_STATE_REBIND) | |
911 | client_start(client, DHCP6_STATE_SOLICITATION); | |
912 | ||
d1b0afe3 PF |
913 | return 0; |
914 | } | |
915 | ||
916 | static usec_t client_timeout_compute_random(usec_t val) { | |
9de8a425 | 917 | return val - (random_u32() % USEC_PER_SEC) * val / 10 / USEC_PER_SEC; |
d1b0afe3 PF |
918 | } |
919 | ||
4b558378 | 920 | static int client_timeout_resend(sd_event_source *s, uint64_t usec, void *userdata) { |
d1b0afe3 PF |
921 | int r = 0; |
922 | sd_dhcp6_client *client = userdata; | |
4b4923e6 | 923 | usec_t time_now, init_retransmit_time = 0, max_retransmit_time = 0; |
5e913450 | 924 | usec_t max_retransmit_duration = 0; |
513a6fa8 | 925 | uint8_t max_retransmit_count = 0; |
d1b0afe3 PF |
926 | char time_string[FORMAT_TIMESPAN_MAX]; |
927 | ||
928 | assert(s); | |
929 | assert(client); | |
930 | assert(client->event); | |
931 | ||
c9393e8c | 932 | (void) event_source_disable(client->timeout_resend); |
d1b0afe3 PF |
933 | |
934 | switch (client->state) { | |
bbfa43ca PF |
935 | case DHCP6_STATE_INFORMATION_REQUEST: |
936 | init_retransmit_time = DHCP6_INF_TIMEOUT; | |
937 | max_retransmit_time = DHCP6_INF_MAX_RT; | |
938 | ||
939 | break; | |
940 | ||
d1b0afe3 | 941 | case DHCP6_STATE_SOLICITATION: |
7246333c PF |
942 | |
943 | if (client->retransmit_count && client->lease) { | |
944 | client_start(client, DHCP6_STATE_REQUEST); | |
945 | return 0; | |
946 | } | |
947 | ||
d1b0afe3 PF |
948 | init_retransmit_time = DHCP6_SOL_TIMEOUT; |
949 | max_retransmit_time = DHCP6_SOL_MAX_RT; | |
d1b0afe3 PF |
950 | |
951 | break; | |
952 | ||
7246333c PF |
953 | case DHCP6_STATE_REQUEST: |
954 | init_retransmit_time = DHCP6_REQ_TIMEOUT; | |
955 | max_retransmit_time = DHCP6_REQ_MAX_RT; | |
956 | max_retransmit_count = DHCP6_REQ_MAX_RC; | |
7246333c PF |
957 | |
958 | break; | |
959 | ||
3dc34fcc PF |
960 | case DHCP6_STATE_RENEW: |
961 | init_retransmit_time = DHCP6_REN_TIMEOUT; | |
962 | max_retransmit_time = DHCP6_REN_MAX_RT; | |
3dc34fcc PF |
963 | |
964 | /* RFC 3315, section 18.1.3. says max retransmit duration will | |
965 | be the remaining time until T2. Instead of setting MRD, | |
966 | wait for T2 to trigger with the same end result */ | |
3dc34fcc PF |
967 | |
968 | break; | |
969 | ||
970 | case DHCP6_STATE_REBIND: | |
971 | init_retransmit_time = DHCP6_REB_TIMEOUT; | |
972 | max_retransmit_time = DHCP6_REB_MAX_RT; | |
3dc34fcc | 973 | |
c9393e8c | 974 | if (event_source_is_enabled(client->timeout_resend_expire) <= 0) { |
3ae01632 YW |
975 | uint32_t expire = 0; |
976 | ||
977 | r = dhcp6_lease_ia_rebind_expire(&client->lease->ia, &expire); | |
3dc34fcc PF |
978 | if (r < 0) { |
979 | client_stop(client, r); | |
980 | return 0; | |
981 | } | |
982 | max_retransmit_duration = expire * USEC_PER_SEC; | |
983 | } | |
984 | ||
985 | break; | |
986 | ||
d1b0afe3 | 987 | case DHCP6_STATE_STOPPED: |
a34b57c0 | 988 | case DHCP6_STATE_BOUND: |
d1b0afe3 PF |
989 | return 0; |
990 | } | |
991 | ||
3ae01632 | 992 | if (max_retransmit_count > 0 && |
d1b0afe3 | 993 | client->retransmit_count >= max_retransmit_count) { |
10c9ce61 | 994 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RETRANS_MAX); |
d1b0afe3 PF |
995 | return 0; |
996 | } | |
997 | ||
fa94c34b | 998 | r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now); |
d1b0afe3 PF |
999 | if (r < 0) |
1000 | goto error; | |
1001 | ||
346e13a2 PF |
1002 | r = client_send_message(client, time_now); |
1003 | if (r >= 0) | |
1004 | client->retransmit_count++; | |
1005 | ||
3ae01632 | 1006 | if (client->retransmit_time == 0) { |
d1b0afe3 PF |
1007 | client->retransmit_time = |
1008 | client_timeout_compute_random(init_retransmit_time); | |
a9aff361 PF |
1009 | |
1010 | if (client->state == DHCP6_STATE_SOLICITATION) | |
1011 | client->retransmit_time += init_retransmit_time / 10; | |
1012 | ||
d1b0afe3 | 1013 | } else { |
3ae01632 | 1014 | if (max_retransmit_time > 0 && |
d1b0afe3 PF |
1015 | client->retransmit_time > max_retransmit_time / 2) |
1016 | client->retransmit_time = client_timeout_compute_random(max_retransmit_time); | |
1017 | else | |
1018 | client->retransmit_time += client_timeout_compute_random(client->retransmit_time); | |
1019 | } | |
1020 | ||
1021 | log_dhcp6_client(client, "Next retransmission in %s", | |
ed19c567 | 1022 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, client->retransmit_time, USEC_PER_SEC)); |
d1b0afe3 | 1023 | |
c9393e8c YW |
1024 | r = event_reset_time(client->event, &client->timeout_resend, |
1025 | clock_boottime_or_monotonic(), | |
1026 | time_now + client->retransmit_time, 10 * USEC_PER_MSEC, | |
1027 | client_timeout_resend, client, | |
1028 | client->event_priority, "dhcp6-resend-timer", true); | |
d1b0afe3 PF |
1029 | if (r < 0) |
1030 | goto error; | |
1031 | ||
3ae01632 | 1032 | if (max_retransmit_duration > 0 && event_source_is_enabled(client->timeout_resend_expire) <= 0) { |
d1b0afe3 PF |
1033 | |
1034 | log_dhcp6_client(client, "Max retransmission duration %"PRIu64" secs", | |
1035 | max_retransmit_duration / USEC_PER_SEC); | |
1036 | ||
c9393e8c YW |
1037 | r = event_reset_time(client->event, &client->timeout_resend_expire, |
1038 | clock_boottime_or_monotonic(), | |
1039 | time_now + max_retransmit_duration, USEC_PER_SEC, | |
1040 | client_timeout_resend_expire, client, | |
1041 | client->event_priority, "dhcp6-resend-expire-timer", true); | |
9021bb9f TG |
1042 | if (r < 0) |
1043 | goto error; | |
d1b0afe3 PF |
1044 | } |
1045 | ||
1046 | error: | |
1047 | if (r < 0) | |
1048 | client_stop(client, r); | |
1049 | ||
1050 | return 0; | |
1051 | } | |
1052 | ||
f12abb48 | 1053 | static int client_ensure_iaid(sd_dhcp6_client *client) { |
cfb5b380 | 1054 | int r; |
6d13616b | 1055 | uint32_t iaid; |
f12abb48 PF |
1056 | |
1057 | assert(client); | |
1058 | ||
8217ed5e | 1059 | if (client->iaid_set) |
f12abb48 PF |
1060 | return 0; |
1061 | ||
6d13616b | 1062 | r = dhcp_identifier_set_iaid(client->ifindex, client->mac_addr, client->mac_addr_len, true, &iaid); |
cfb5b380 TG |
1063 | if (r < 0) |
1064 | return r; | |
f12abb48 | 1065 | |
69b43997 PF |
1066 | client->ia_na.ia_na.id = iaid; |
1067 | client->ia_pd.ia_pd.id = iaid; | |
8217ed5e | 1068 | client->iaid_set = true; |
69b43997 | 1069 | |
f12abb48 PF |
1070 | return 0; |
1071 | } | |
1072 | ||
4b558378 ZJS |
1073 | static int client_parse_message( |
1074 | sd_dhcp6_client *client, | |
1075 | DHCP6Message *message, | |
1076 | size_t len, | |
1077 | sd_dhcp6_lease *lease) { | |
da07cf35 | 1078 | |
5c95a913 | 1079 | uint16_t ia_na_status = 0, ia_pd_status = 0; |
da07cf35 | 1080 | uint32_t lt_t1 = ~0, lt_t2 = ~0; |
5c95a913 | 1081 | usec_t irt = IRT_DEFAULT; |
da07cf35 | 1082 | bool clientid = false; |
3bc424a3 | 1083 | size_t pos = 0; |
631bbe71 | 1084 | int r; |
631bbe71 | 1085 | |
a1140666 LP |
1086 | assert(client); |
1087 | assert(message); | |
1088 | assert(len >= sizeof(DHCP6Message)); | |
1089 | assert(lease); | |
1090 | ||
44481a8b ZJS |
1091 | len -= sizeof(DHCP6Message); |
1092 | ||
3bc424a3 | 1093 | while (pos < len) { |
da07cf35 | 1094 | DHCP6Option *option = (DHCP6Option *) &message->options[pos]; |
c6b4f32a | 1095 | uint16_t optcode, optlen; |
3bc424a3 | 1096 | be32_t iaid_lease; |
5c95a913 | 1097 | int status; |
da07cf35 | 1098 | uint8_t *optval; |
3bc424a3 | 1099 | |
da07cf35 | 1100 | if (len < pos + offsetof(DHCP6Option, data)) |
3bc424a3 PF |
1101 | return -ENOBUFS; |
1102 | ||
1103 | optcode = be16toh(option->code); | |
1104 | optlen = be16toh(option->len); | |
1105 | optval = option->data; | |
1106 | ||
da07cf35 YW |
1107 | if (len < pos + offsetof(DHCP6Option, data) + optlen) |
1108 | return -ENOBUFS; | |
1109 | ||
631bbe71 | 1110 | switch (optcode) { |
2c1ab8ca | 1111 | case SD_DHCP6_OPTION_CLIENTID: |
631bbe71 PF |
1112 | if (clientid) { |
1113 | log_dhcp6_client(client, "%s contains multiple clientids", | |
1114 | dhcp6_message_type_to_string(message->type)); | |
1115 | return -EINVAL; | |
1116 | } | |
1117 | ||
66eac120 | 1118 | if (optlen != client->duid_len || |
631bbe71 PF |
1119 | memcmp(&client->duid, optval, optlen) != 0) { |
1120 | log_dhcp6_client(client, "%s DUID does not match", | |
1121 | dhcp6_message_type_to_string(message->type)); | |
1122 | ||
1123 | return -EINVAL; | |
1124 | } | |
1125 | clientid = true; | |
1126 | ||
1127 | break; | |
1128 | ||
2c1ab8ca | 1129 | case SD_DHCP6_OPTION_SERVERID: |
99f1d3fc ZJS |
1130 | r = dhcp6_lease_get_serverid(lease, NULL, NULL); |
1131 | if (r >= 0) { | |
631bbe71 PF |
1132 | log_dhcp6_client(client, "%s contains multiple serverids", |
1133 | dhcp6_message_type_to_string(message->type)); | |
1134 | return -EINVAL; | |
1135 | } | |
1136 | ||
1137 | r = dhcp6_lease_set_serverid(lease, optval, optlen); | |
1138 | if (r < 0) | |
1139 | return r; | |
1140 | ||
1141 | break; | |
1142 | ||
2c1ab8ca | 1143 | case SD_DHCP6_OPTION_PREFERENCE: |
631bbe71 PF |
1144 | if (optlen != 1) |
1145 | return -EINVAL; | |
1146 | ||
3bc424a3 | 1147 | r = dhcp6_lease_set_preference(lease, optval[0]); |
631bbe71 PF |
1148 | if (r < 0) |
1149 | return r; | |
1150 | ||
1151 | break; | |
1152 | ||
2c1ab8ca | 1153 | case SD_DHCP6_OPTION_STATUS_CODE: |
91c43f39 YW |
1154 | status = dhcp6_option_parse_status(option, optlen + sizeof(DHCP6Option)); |
1155 | if (status < 0) | |
1156 | return status; | |
1157 | ||
1158 | if (status > 0) { | |
631bbe71 PF |
1159 | log_dhcp6_client(client, "%s Status %s", |
1160 | dhcp6_message_type_to_string(message->type), | |
1161 | dhcp6_message_status_to_string(status)); | |
c6b4f32a | 1162 | |
631bbe71 PF |
1163 | return -EINVAL; |
1164 | } | |
1165 | ||
1166 | break; | |
1167 | ||
2c1ab8ca | 1168 | case SD_DHCP6_OPTION_IA_NA: |
bbfa43ca PF |
1169 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { |
1170 | log_dhcp6_client(client, "Information request ignoring IA NA option"); | |
1171 | ||
1172 | break; | |
1173 | } | |
1174 | ||
5c95a913 | 1175 | r = dhcp6_option_parse_ia(option, &lease->ia, &ia_na_status); |
631bbe71 PF |
1176 | if (r < 0 && r != -ENOMSG) |
1177 | return r; | |
1178 | ||
5c95a913 SS |
1179 | if (ia_na_status == DHCP6_STATUS_NO_ADDRS_AVAIL) { |
1180 | pos += offsetof(DHCP6Option, data) + optlen; | |
1181 | continue; | |
1182 | } | |
1183 | ||
631bbe71 PF |
1184 | r = dhcp6_lease_get_iaid(lease, &iaid_lease); |
1185 | if (r < 0) | |
1186 | return r; | |
1187 | ||
e0026dcb | 1188 | if (client->ia_na.ia_na.id != iaid_lease) { |
dce6563f PF |
1189 | log_dhcp6_client(client, "%s has wrong IAID for IA NA", |
1190 | dhcp6_message_type_to_string(message->type)); | |
1191 | return -EINVAL; | |
1192 | } | |
1193 | ||
b47fb949 PF |
1194 | if (lease->ia.addresses) { |
1195 | lt_t1 = MIN(lt_t1, be32toh(lease->ia.ia_na.lifetime_t1)); | |
1196 | lt_t2 = MIN(lt_t2, be32toh(lease->ia.ia_na.lifetime_t1)); | |
1197 | } | |
1198 | ||
dce6563f PF |
1199 | break; |
1200 | ||
1201 | case SD_DHCP6_OPTION_IA_PD: | |
1202 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { | |
1203 | log_dhcp6_client(client, "Information request ignoring IA PD option"); | |
1204 | ||
1205 | break; | |
1206 | } | |
1207 | ||
5c95a913 | 1208 | r = dhcp6_option_parse_ia(option, &lease->pd, &ia_pd_status); |
dce6563f PF |
1209 | if (r < 0 && r != -ENOMSG) |
1210 | return r; | |
1211 | ||
5c95a913 SS |
1212 | if (ia_pd_status == DHCP6_STATUS_NO_PREFIX_AVAIL) { |
1213 | pos += offsetof(DHCP6Option, data) + optlen; | |
1214 | continue; | |
1215 | } | |
1216 | ||
49228c75 | 1217 | r = dhcp6_lease_get_pd_iaid(lease, &iaid_lease); |
dce6563f PF |
1218 | if (r < 0) |
1219 | return r; | |
1220 | ||
1221 | if (client->ia_pd.ia_pd.id != iaid_lease) { | |
1222 | log_dhcp6_client(client, "%s has wrong IAID for IA PD", | |
631bbe71 PF |
1223 | dhcp6_message_type_to_string(message->type)); |
1224 | return -EINVAL; | |
1225 | } | |
1226 | ||
b47fb949 PF |
1227 | if (lease->pd.addresses) { |
1228 | lt_t1 = MIN(lt_t1, be32toh(lease->pd.ia_pd.lifetime_t1)); | |
1229 | lt_t2 = MIN(lt_t2, be32toh(lease->pd.ia_pd.lifetime_t2)); | |
1230 | } | |
1231 | ||
631bbe71 | 1232 | break; |
ed6ee219 | 1233 | |
2c1ab8ca | 1234 | case SD_DHCP6_OPTION_RAPID_COMMIT: |
ed6ee219 PF |
1235 | r = dhcp6_lease_set_rapid_commit(lease); |
1236 | if (r < 0) | |
1237 | return r; | |
1238 | ||
1239 | break; | |
7bd8e95d | 1240 | |
2c1ab8ca | 1241 | case SD_DHCP6_OPTION_DNS_SERVERS: |
7bd8e95d PF |
1242 | r = dhcp6_lease_set_dns(lease, optval, optlen); |
1243 | if (r < 0) | |
1244 | return r; | |
1245 | ||
1246 | break; | |
5da1b97f | 1247 | |
2c1ab8ca | 1248 | case SD_DHCP6_OPTION_DOMAIN_LIST: |
5da1b97f PF |
1249 | r = dhcp6_lease_set_domains(lease, optval, optlen); |
1250 | if (r < 0) | |
1251 | return r; | |
1252 | ||
1253 | break; | |
1254 | ||
2c1ab8ca | 1255 | case SD_DHCP6_OPTION_NTP_SERVER: |
6599680e PF |
1256 | r = dhcp6_lease_set_ntp(lease, optval, optlen); |
1257 | if (r < 0) | |
1258 | return r; | |
1259 | ||
1260 | break; | |
41e4615d | 1261 | |
2c1ab8ca | 1262 | case SD_DHCP6_OPTION_SNTP_SERVERS: |
41e4615d PF |
1263 | r = dhcp6_lease_set_sntp(lease, optval, optlen); |
1264 | if (r < 0) | |
1265 | return r; | |
1266 | ||
1267 | break; | |
fcb51238 | 1268 | |
c43eea9f BG |
1269 | case SD_DHCP6_OPTION_FQDN: |
1270 | r = dhcp6_lease_set_fqdn(lease, optval, optlen); | |
1271 | if (r < 0) | |
1272 | return r; | |
1273 | ||
1274 | break; | |
1275 | ||
fcb51238 | 1276 | case SD_DHCP6_OPTION_INFORMATION_REFRESH_TIME: |
6ffe71d0 YW |
1277 | if (optlen != 4) |
1278 | return -EINVAL; | |
1279 | ||
0eb5e6d3 | 1280 | irt = unaligned_read_be32((be32_t *) optval) * USEC_PER_SEC; |
fcb51238 | 1281 | break; |
631bbe71 | 1282 | } |
6599680e | 1283 | |
23976cb9 | 1284 | pos += offsetof(DHCP6Option, data) + optlen; |
631bbe71 PF |
1285 | } |
1286 | ||
5c95a913 SS |
1287 | if (ia_na_status > 0 && ia_pd_status > 0) { |
1288 | log_dhcp6_client(client, "No IA_PD prefix or IA_NA address received. Ignoring."); | |
1289 | return -EINVAL; | |
1290 | } | |
1291 | ||
1eeddba4 | 1292 | if (!clientid) { |
631bbe71 PF |
1293 | log_dhcp6_client(client, "%s has incomplete options", |
1294 | dhcp6_message_type_to_string(message->type)); | |
1295 | return -EINVAL; | |
1296 | } | |
1297 | ||
bbfa43ca | 1298 | if (client->state != DHCP6_STATE_INFORMATION_REQUEST) { |
99f1d3fc ZJS |
1299 | r = dhcp6_lease_get_serverid(lease, NULL, NULL); |
1300 | if (r < 0) { | |
bbfa43ca PF |
1301 | log_dhcp6_client(client, "%s has no server id", |
1302 | dhcp6_message_type_to_string(message->type)); | |
99f1d3fc ZJS |
1303 | return -EINVAL; |
1304 | } | |
b47fb949 | 1305 | |
99f1d3fc ZJS |
1306 | } else { |
1307 | if (lease->ia.addresses) { | |
1308 | lease->ia.ia_na.lifetime_t1 = htobe32(lt_t1); | |
1309 | lease->ia.ia_na.lifetime_t2 = htobe32(lt_t2); | |
1310 | } | |
b47fb949 | 1311 | |
99f1d3fc ZJS |
1312 | if (lease->pd.addresses) { |
1313 | lease->pd.ia_pd.lifetime_t1 = htobe32(lt_t1); | |
1314 | lease->pd.ia_pd.lifetime_t2 = htobe32(lt_t2); | |
1315 | } | |
bbfa43ca | 1316 | } |
631bbe71 | 1317 | |
fcb51238 YW |
1318 | client->information_refresh_time_usec = MAX(irt, IRT_MINIMUM); |
1319 | ||
21a9905c | 1320 | return 0; |
631bbe71 PF |
1321 | } |
1322 | ||
0ae0e5cd | 1323 | static int client_receive_reply(sd_dhcp6_client *client, DHCP6Message *reply, size_t len) { |
4afd3348 | 1324 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
ed6ee219 | 1325 | bool rapid_commit; |
a1140666 LP |
1326 | int r; |
1327 | ||
1328 | assert(client); | |
1329 | assert(reply); | |
a34b57c0 PF |
1330 | |
1331 | if (reply->type != DHCP6_REPLY) | |
ed6ee219 | 1332 | return 0; |
a34b57c0 PF |
1333 | |
1334 | r = dhcp6_lease_new(&lease); | |
1335 | if (r < 0) | |
1336 | return -ENOMEM; | |
1337 | ||
1338 | r = client_parse_message(client, reply, len, lease); | |
1339 | if (r < 0) | |
1340 | return r; | |
1341 | ||
ed6ee219 PF |
1342 | if (client->state == DHCP6_STATE_SOLICITATION) { |
1343 | r = dhcp6_lease_get_rapid_commit(lease, &rapid_commit); | |
1344 | if (r < 0) | |
1345 | return r; | |
1346 | ||
1347 | if (!rapid_commit) | |
1348 | return 0; | |
1349 | } | |
1350 | ||
431a4bc8 YW |
1351 | sd_dhcp6_lease_unref(client->lease); |
1352 | client->lease = TAKE_PTR(lease); | |
a34b57c0 PF |
1353 | |
1354 | return DHCP6_STATE_BOUND; | |
1355 | } | |
1356 | ||
0ae0e5cd | 1357 | static int client_receive_advertise(sd_dhcp6_client *client, DHCP6Message *advertise, size_t len) { |
4afd3348 | 1358 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
631bbe71 | 1359 | uint8_t pref_advertise = 0, pref_lease = 0; |
a1140666 | 1360 | int r; |
631bbe71 PF |
1361 | |
1362 | if (advertise->type != DHCP6_ADVERTISE) | |
ed6ee219 | 1363 | return 0; |
631bbe71 PF |
1364 | |
1365 | r = dhcp6_lease_new(&lease); | |
1366 | if (r < 0) | |
1367 | return r; | |
1368 | ||
1369 | r = client_parse_message(client, advertise, len, lease); | |
1370 | if (r < 0) | |
1371 | return r; | |
1372 | ||
1373 | r = dhcp6_lease_get_preference(lease, &pref_advertise); | |
1374 | if (r < 0) | |
1375 | return r; | |
1376 | ||
1377 | r = dhcp6_lease_get_preference(client->lease, &pref_lease); | |
bbfa43ca PF |
1378 | |
1379 | if (r < 0 || pref_advertise > pref_lease) { | |
431a4bc8 YW |
1380 | sd_dhcp6_lease_unref(client->lease); |
1381 | client->lease = TAKE_PTR(lease); | |
631bbe71 PF |
1382 | r = 0; |
1383 | } | |
1384 | ||
7246333c PF |
1385 | if (pref_advertise == 255 || client->retransmit_count > 1) |
1386 | r = DHCP6_STATE_REQUEST; | |
1387 | ||
631bbe71 PF |
1388 | return r; |
1389 | } | |
1390 | ||
004845d1 LP |
1391 | static int client_receive_message( |
1392 | sd_event_source *s, | |
1393 | int fd, uint32_t | |
1394 | revents, | |
1395 | void *userdata) { | |
1396 | ||
631bbe71 | 1397 | sd_dhcp6_client *client = userdata; |
3f0c075f | 1398 | DHCP6_CLIENT_DONT_DESTROY(client); |
0d43d2fc | 1399 | _cleanup_free_ DHCP6Message *message = NULL; |
4edc2c9b LP |
1400 | ssize_t buflen, len; |
1401 | int r = 0; | |
631bbe71 PF |
1402 | |
1403 | assert(s); | |
1404 | assert(client); | |
1405 | assert(client->event); | |
1406 | ||
4edc2c9b | 1407 | buflen = next_datagram_size_fd(fd); |
d46b79bb | 1408 | if (buflen == -ENETDOWN) |
22a3fd2d BG |
1409 | /* the link is down. Don't return an error or the I/O event |
1410 | source will be disconnected and we won't be able to receive | |
1411 | packets again when the link comes back. */ | |
1412 | return 0; | |
4edc2c9b LP |
1413 | if (buflen < 0) |
1414 | return buflen; | |
631bbe71 | 1415 | |
0d43d2fc | 1416 | message = malloc(buflen); |
631bbe71 PF |
1417 | if (!message) |
1418 | return -ENOMEM; | |
1419 | ||
cf447cb6 | 1420 | len = recv(fd, message, buflen, 0); |
0d43d2fc | 1421 | if (len < 0) { |
22a3fd2d BG |
1422 | /* see comment above for why we shouldn't error out on ENETDOWN. */ |
1423 | if (IN_SET(errno, EAGAIN, EINTR, ENETDOWN)) | |
0d43d2fc TG |
1424 | return 0; |
1425 | ||
bd9a7221 | 1426 | return log_dhcp6_client_errno(client, errno, "Could not receive message from UDP socket: %m"); |
0d43d2fc | 1427 | |
004845d1 LP |
1428 | } |
1429 | if ((size_t) len < sizeof(DHCP6Message)) { | |
1430 | log_dhcp6_client(client, "Too small to be DHCP6 message: ignoring"); | |
631bbe71 | 1431 | return 0; |
004845d1 | 1432 | } |
631bbe71 PF |
1433 | |
1434 | switch(message->type) { | |
1435 | case DHCP6_SOLICIT: | |
1436 | case DHCP6_REQUEST: | |
1437 | case DHCP6_CONFIRM: | |
1438 | case DHCP6_RENEW: | |
1439 | case DHCP6_REBIND: | |
1440 | case DHCP6_RELEASE: | |
1441 | case DHCP6_DECLINE: | |
1442 | case DHCP6_INFORMATION_REQUEST: | |
1443 | case DHCP6_RELAY_FORW: | |
1444 | case DHCP6_RELAY_REPL: | |
1445 | return 0; | |
1446 | ||
1447 | case DHCP6_ADVERTISE: | |
1448 | case DHCP6_REPLY: | |
1449 | case DHCP6_RECONFIGURE: | |
1450 | break; | |
1451 | ||
1452 | default: | |
bd9a7221 | 1453 | log_dhcp6_client(client, "Unknown message type %d", message->type); |
631bbe71 PF |
1454 | return 0; |
1455 | } | |
1456 | ||
1457 | if (client->transaction_id != (message->transaction_id & | |
1458 | htobe32(0x00ffffff))) | |
1459 | return 0; | |
1460 | ||
1461 | switch (client->state) { | |
bbfa43ca PF |
1462 | case DHCP6_STATE_INFORMATION_REQUEST: |
1463 | r = client_receive_reply(client, message, len); | |
1464 | if (r < 0) | |
1465 | return 0; | |
1466 | ||
10c9ce61 | 1467 | client_notify(client, SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST); |
bbfa43ca PF |
1468 | |
1469 | client_start(client, DHCP6_STATE_STOPPED); | |
1470 | ||
1471 | break; | |
1472 | ||
631bbe71 PF |
1473 | case DHCP6_STATE_SOLICITATION: |
1474 | r = client_receive_advertise(client, message, len); | |
1475 | ||
ed6ee219 | 1476 | if (r == DHCP6_STATE_REQUEST) { |
7246333c PF |
1477 | client_start(client, r); |
1478 | ||
ed6ee219 PF |
1479 | break; |
1480 | } | |
631bbe71 | 1481 | |
d7b34e38 | 1482 | _fallthrough_; /* for Solicitation Rapid Commit option check */ |
7246333c | 1483 | case DHCP6_STATE_REQUEST: |
3dc34fcc PF |
1484 | case DHCP6_STATE_RENEW: |
1485 | case DHCP6_STATE_REBIND: | |
1486 | ||
a34b57c0 PF |
1487 | r = client_receive_reply(client, message, len); |
1488 | if (r < 0) | |
1489 | return 0; | |
1490 | ||
1491 | if (r == DHCP6_STATE_BOUND) { | |
1492 | ||
1493 | r = client_start(client, DHCP6_STATE_BOUND); | |
1494 | if (r < 0) { | |
1495 | client_stop(client, r); | |
1496 | return 0; | |
1497 | } | |
1498 | ||
10c9ce61 | 1499 | client_notify(client, SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE); |
a34b57c0 PF |
1500 | } |
1501 | ||
1502 | break; | |
1503 | ||
1504 | case DHCP6_STATE_BOUND: | |
1505 | ||
1506 | break; | |
1507 | ||
631bbe71 | 1508 | case DHCP6_STATE_STOPPED: |
631bbe71 PF |
1509 | return 0; |
1510 | } | |
1511 | ||
712fdfd6 YW |
1512 | log_dhcp6_client(client, "Recv %s", |
1513 | dhcp6_message_type_to_string(message->type)); | |
631bbe71 | 1514 | |
a9aff361 PF |
1515 | return 0; |
1516 | } | |
1517 | ||
134ebaa4 PF |
1518 | static int client_get_lifetime(sd_dhcp6_client *client, uint32_t *lifetime_t1, |
1519 | uint32_t *lifetime_t2) { | |
1520 | assert_return(client, -EINVAL); | |
1521 | assert_return(client->lease, -EINVAL); | |
1522 | ||
1523 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA) && client->lease->ia.addresses) { | |
1524 | *lifetime_t1 = be32toh(client->lease->ia.ia_na.lifetime_t1); | |
1525 | *lifetime_t2 = be32toh(client->lease->ia.ia_na.lifetime_t2); | |
1526 | ||
1527 | return 0; | |
1528 | } | |
1529 | ||
1530 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD) && client->lease->pd.addresses) { | |
1531 | *lifetime_t1 = be32toh(client->lease->pd.ia_pd.lifetime_t1); | |
1532 | *lifetime_t2 = be32toh(client->lease->pd.ia_pd.lifetime_t2); | |
1533 | ||
1534 | return 0; | |
1535 | } | |
1536 | ||
1537 | return -ENOMSG; | |
1538 | } | |
1539 | ||
0ae0e5cd | 1540 | static int client_start(sd_dhcp6_client *client, enum DHCP6State state) { |
f12abb48 | 1541 | int r; |
a34b57c0 PF |
1542 | usec_t timeout, time_now; |
1543 | char time_string[FORMAT_TIMESPAN_MAX]; | |
134ebaa4 | 1544 | uint32_t lifetime_t1, lifetime_t2; |
f12abb48 PF |
1545 | |
1546 | assert_return(client, -EINVAL); | |
1547 | assert_return(client->event, -EINVAL); | |
2f8e7633 | 1548 | assert_return(client->ifindex > 0, -EINVAL); |
c3e2adea | 1549 | assert_return(client->state != state, -EINVAL); |
f12abb48 | 1550 | |
c9393e8c YW |
1551 | (void) event_source_disable(client->timeout_resend_expire); |
1552 | (void) event_source_disable(client->timeout_resend); | |
c3e2adea PF |
1553 | client->retransmit_time = 0; |
1554 | client->retransmit_count = 0; | |
f12abb48 | 1555 | |
38a03f06 LP |
1556 | r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now); |
1557 | if (r < 0) | |
1558 | return r; | |
346e13a2 | 1559 | |
7ac6c26a PF |
1560 | if (!client->receive_message) { |
1561 | r = sd_event_add_io(client->event, &client->receive_message, | |
1562 | client->fd, EPOLLIN, client_receive_message, | |
1563 | client); | |
1564 | if (r < 0) | |
1565 | goto error; | |
1566 | ||
1567 | r = sd_event_source_set_priority(client->receive_message, | |
1568 | client->event_priority); | |
1569 | if (r < 0) | |
1570 | goto error; | |
1571 | ||
1572 | r = sd_event_source_set_description(client->receive_message, | |
1573 | "dhcp6-receive-message"); | |
1574 | if (r < 0) | |
1575 | goto error; | |
1576 | } | |
1577 | ||
c3e2adea PF |
1578 | switch (state) { |
1579 | case DHCP6_STATE_STOPPED: | |
bbfa43ca PF |
1580 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { |
1581 | client->state = DHCP6_STATE_STOPPED; | |
a9aff361 | 1582 | |
bbfa43ca PF |
1583 | return 0; |
1584 | } | |
9021bb9f | 1585 | |
4831981d | 1586 | _fallthrough_; |
bbfa43ca | 1587 | case DHCP6_STATE_SOLICITATION: |
c3e2adea PF |
1588 | client->state = DHCP6_STATE_SOLICITATION; |
1589 | ||
7246333c PF |
1590 | break; |
1591 | ||
bbfa43ca | 1592 | case DHCP6_STATE_INFORMATION_REQUEST: |
7246333c | 1593 | case DHCP6_STATE_REQUEST: |
3dc34fcc PF |
1594 | case DHCP6_STATE_RENEW: |
1595 | case DHCP6_STATE_REBIND: | |
a34b57c0 | 1596 | |
7246333c PF |
1597 | client->state = state; |
1598 | ||
c3e2adea | 1599 | break; |
a34b57c0 PF |
1600 | |
1601 | case DHCP6_STATE_BOUND: | |
1602 | ||
134ebaa4 PF |
1603 | r = client_get_lifetime(client, &lifetime_t1, &lifetime_t2); |
1604 | if (r < 0) | |
1605 | goto error; | |
a34b57c0 | 1606 | |
134ebaa4 | 1607 | if (lifetime_t1 == 0xffffffff || lifetime_t2 == 0xffffffff) { |
bd9a7221 | 1608 | log_dhcp6_client(client, "Infinite T1 0x%08x or T2 0x%08x", |
134ebaa4 | 1609 | lifetime_t1, lifetime_t2); |
a34b57c0 PF |
1610 | |
1611 | return 0; | |
1612 | } | |
1613 | ||
134ebaa4 | 1614 | timeout = client_timeout_compute_random(lifetime_t1 * USEC_PER_SEC); |
a34b57c0 PF |
1615 | |
1616 | log_dhcp6_client(client, "T1 expires in %s", | |
ed19c567 | 1617 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC)); |
a34b57c0 | 1618 | |
c9393e8c YW |
1619 | r = event_reset_time(client->event, &client->timeout_t1, |
1620 | clock_boottime_or_monotonic(), | |
1621 | time_now + timeout, 10 * USEC_PER_SEC, | |
1622 | client_timeout_t1, client, | |
1623 | client->event_priority, "dhcp6-t1-timeout", true); | |
9021bb9f | 1624 | if (r < 0) |
7ac6c26a | 1625 | goto error; |
9021bb9f | 1626 | |
134ebaa4 | 1627 | timeout = client_timeout_compute_random(lifetime_t2 * USEC_PER_SEC); |
a34b57c0 PF |
1628 | |
1629 | log_dhcp6_client(client, "T2 expires in %s", | |
ed19c567 | 1630 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC)); |
a34b57c0 | 1631 | |
c9393e8c YW |
1632 | r = event_reset_time(client->event, &client->timeout_t2, |
1633 | clock_boottime_or_monotonic(), | |
1634 | time_now + timeout, 10 * USEC_PER_SEC, | |
1635 | client_timeout_t2, client, | |
1636 | client->event_priority, "dhcp6-t2-timeout", true); | |
9021bb9f | 1637 | if (r < 0) |
7ac6c26a | 1638 | goto error; |
9021bb9f | 1639 | |
3dc34fcc PF |
1640 | client->state = state; |
1641 | ||
a34b57c0 | 1642 | return 0; |
c3e2adea | 1643 | } |
a9aff361 | 1644 | |
c3e2adea | 1645 | client->transaction_id = random_u32() & htobe32(0x00ffffff); |
346e13a2 | 1646 | client->transaction_start = time_now; |
d1b0afe3 | 1647 | |
c9393e8c YW |
1648 | r = event_reset_time(client->event, &client->timeout_resend, |
1649 | clock_boottime_or_monotonic(), | |
1650 | 0, 0, | |
1651 | client_timeout_resend, client, | |
1652 | client->event_priority, "dhcp6-resend-timeout", true); | |
9021bb9f | 1653 | if (r < 0) |
7ac6c26a | 1654 | goto error; |
9021bb9f | 1655 | |
f12abb48 | 1656 | return 0; |
7ac6c26a PF |
1657 | |
1658 | error: | |
1659 | client_reset(client); | |
1660 | return r; | |
f12abb48 PF |
1661 | } |
1662 | ||
0ae0e5cd | 1663 | int sd_dhcp6_client_stop(sd_dhcp6_client *client) { |
c8bae363 YW |
1664 | if (!client) |
1665 | return 0; | |
f667c150 | 1666 | |
10c9ce61 | 1667 | client_stop(client, SD_DHCP6_CLIENT_EVENT_STOP); |
139b011a | 1668 | |
7ac6c26a PF |
1669 | client->fd = safe_close(client->fd); |
1670 | ||
139b011a PF |
1671 | return 0; |
1672 | } | |
1673 | ||
f667c150 TG |
1674 | int sd_dhcp6_client_is_running(sd_dhcp6_client *client) { |
1675 | assert_return(client, -EINVAL); | |
1676 | ||
1677 | return client->state != DHCP6_STATE_STOPPED; | |
1678 | } | |
1679 | ||
0ae0e5cd | 1680 | int sd_dhcp6_client_start(sd_dhcp6_client *client) { |
bbfa43ca | 1681 | enum DHCP6State state = DHCP6_STATE_SOLICITATION; |
6d95e7d9 | 1682 | int r; |
139b011a PF |
1683 | |
1684 | assert_return(client, -EINVAL); | |
1685 | assert_return(client->event, -EINVAL); | |
2f8e7633 | 1686 | assert_return(client->ifindex > 0, -EINVAL); |
94876904 | 1687 | assert_return(in6_addr_is_link_local(&client->local_address) > 0, -EINVAL); |
139b011a | 1688 | |
d7c9c21f | 1689 | if (!IN_SET(client->state, DHCP6_STATE_STOPPED)) |
63348d13 | 1690 | return -EBUSY; |
d7c9c21f | 1691 | |
f311a62b PF |
1692 | if (!client->information_request && !client->request) |
1693 | return -EINVAL; | |
1694 | ||
c806ffb9 | 1695 | r = client_reset(client); |
f12abb48 PF |
1696 | if (r < 0) |
1697 | return r; | |
1698 | ||
bbfa43ca PF |
1699 | r = client_ensure_iaid(client); |
1700 | if (r < 0) | |
1701 | return r; | |
1702 | ||
cc22955c TH |
1703 | r = client_ensure_duid(client); |
1704 | if (r < 0) | |
1705 | return r; | |
1706 | ||
10a0f27b PF |
1707 | if (client->fd < 0) { |
1708 | r = dhcp6_network_bind_udp_socket(client->ifindex, &client->local_address); | |
1709 | if (r < 0) { | |
1710 | _cleanup_free_ char *p = NULL; | |
1711 | ||
1712 | (void) in_addr_to_string(AF_INET6, (const union in_addr_union*) &client->local_address, &p); | |
1713 | return log_dhcp6_client_errno(client, r, | |
1714 | "Failed to bind to UDP socket at address %s: %m", strna(p)); | |
1715 | } | |
bd9a7221 | 1716 | |
10a0f27b | 1717 | client->fd = r; |
bd9a7221 | 1718 | } |
bbfa43ca | 1719 | |
fcb51238 YW |
1720 | if (client->information_request) { |
1721 | usec_t t = now(CLOCK_MONOTONIC); | |
1722 | ||
1723 | if (t < usec_add(client->information_request_time_usec, client->information_refresh_time_usec)) | |
1724 | return 0; | |
1725 | ||
1726 | client->information_request_time_usec = t; | |
bbfa43ca | 1727 | state = DHCP6_STATE_INFORMATION_REQUEST; |
fcb51238 | 1728 | } |
bbfa43ca PF |
1729 | |
1730 | log_dhcp6_client(client, "Started in %s mode", | |
787dd704 | 1731 | client->information_request ? "Information request" : "Managed"); |
bbfa43ca PF |
1732 | |
1733 | return client_start(client, state); | |
139b011a PF |
1734 | } |
1735 | ||
32d20645 | 1736 | int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event, int64_t priority) { |
139b011a PF |
1737 | int r; |
1738 | ||
1739 | assert_return(client, -EINVAL); | |
1740 | assert_return(!client->event, -EBUSY); | |
1741 | ||
1742 | if (event) | |
1743 | client->event = sd_event_ref(event); | |
1744 | else { | |
1745 | r = sd_event_default(&client->event); | |
1746 | if (r < 0) | |
1747 | return 0; | |
1748 | } | |
1749 | ||
1750 | client->event_priority = priority; | |
1751 | ||
1752 | return 0; | |
1753 | } | |
1754 | ||
1755 | int sd_dhcp6_client_detach_event(sd_dhcp6_client *client) { | |
1756 | assert_return(client, -EINVAL); | |
1757 | ||
1758 | client->event = sd_event_unref(client->event); | |
1759 | ||
1760 | return 0; | |
1761 | } | |
1762 | ||
1763 | sd_event *sd_dhcp6_client_get_event(sd_dhcp6_client *client) { | |
a1140666 | 1764 | assert_return(client, NULL); |
139b011a PF |
1765 | |
1766 | return client->event; | |
1767 | } | |
1768 | ||
8301aa0b YW |
1769 | static sd_dhcp6_client *dhcp6_client_free(sd_dhcp6_client *client) { |
1770 | assert(client); | |
139b011a | 1771 | |
c9393e8c YW |
1772 | client->timeout_resend = sd_event_source_unref(client->timeout_resend); |
1773 | client->timeout_resend_expire = sd_event_source_unref(client->timeout_resend_expire); | |
1774 | client->timeout_t1 = sd_event_source_unref(client->timeout_t1); | |
1775 | client->timeout_t2 = sd_event_source_unref(client->timeout_t2); | |
1776 | ||
3733eec3 LP |
1777 | client_reset(client); |
1778 | ||
10a0f27b PF |
1779 | client->fd = safe_close(client->fd); |
1780 | ||
3733eec3 | 1781 | sd_dhcp6_client_detach_event(client); |
3733eec3 LP |
1782 | |
1783 | free(client->req_opts); | |
8006aa32 | 1784 | free(client->fqdn); |
de8d6e55 | 1785 | free(client->mudurl); |
33923925 | 1786 | |
e7d5fe17 | 1787 | ordered_hashmap_free(client->extra_options); |
33923925 | 1788 | strv_free(client->user_class); |
73c8ced7 | 1789 | strv_free(client->vendor_class); |
33923925 | 1790 | |
6b430fdb | 1791 | return mfree(client); |
139b011a PF |
1792 | } |
1793 | ||
8301aa0b YW |
1794 | DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp6_client, sd_dhcp6_client, dhcp6_client_free); |
1795 | ||
0ae0e5cd | 1796 | int sd_dhcp6_client_new(sd_dhcp6_client **ret) { |
4afd3348 | 1797 | _cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL; |
8b8ecac8 | 1798 | _cleanup_free_ be16_t *req_opts = NULL; |
da6fe470 | 1799 | size_t t; |
139b011a PF |
1800 | |
1801 | assert_return(ret, -EINVAL); | |
1802 | ||
8b8ecac8 YW |
1803 | req_opts = new(be16_t, ELEMENTSOF(default_req_opts)); |
1804 | if (!req_opts) | |
139b011a PF |
1805 | return -ENOMEM; |
1806 | ||
8b8ecac8 YW |
1807 | for (t = 0; t < ELEMENTSOF(default_req_opts); t++) |
1808 | req_opts[t] = htobe16(default_req_opts[t]); | |
c806ffb9 | 1809 | |
8b8ecac8 YW |
1810 | client = new(sd_dhcp6_client, 1); |
1811 | if (!client) | |
da6fe470 PF |
1812 | return -ENOMEM; |
1813 | ||
8b8ecac8 YW |
1814 | *client = (sd_dhcp6_client) { |
1815 | .n_ref = 1, | |
1816 | .ia_na.type = SD_DHCP6_OPTION_IA_NA, | |
1817 | .ia_pd.type = SD_DHCP6_OPTION_IA_PD, | |
1818 | .ifindex = -1, | |
1819 | .request = DHCP6_REQUEST_IA_NA, | |
1820 | .fd = -1, | |
1821 | .req_opts_len = ELEMENTSOF(default_req_opts), | |
2805536b SS |
1822 | .hint_pd_prefix.iapdprefix.lifetime_preferred = (be32_t) -1, |
1823 | .hint_pd_prefix.iapdprefix.lifetime_valid = (be32_t) -1, | |
8b8ecac8 YW |
1824 | .req_opts = TAKE_PTR(req_opts), |
1825 | }; | |
da6fe470 | 1826 | |
1cc6c93a | 1827 | *ret = TAKE_PTR(client); |
139b011a PF |
1828 | |
1829 | return 0; | |
1830 | } |