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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" |
61a9fa8f | 24 | #include "network-common.h" |
07630cea | 25 | #include "random-util.h" |
4edc2c9b | 26 | #include "socket-util.h" |
8b43440b | 27 | #include "string-table.h" |
7e19cc54 | 28 | #include "strv.h" |
07630cea | 29 | #include "util.h" |
de8d6e55 | 30 | #include "web-util.h" |
139b011a | 31 | |
76253e73 DW |
32 | #define MAX_MAC_ADDR_LEN INFINIBAND_ALEN |
33 | ||
6ffe71d0 YW |
34 | #define IRT_DEFAULT (1 * USEC_PER_DAY) |
35 | #define IRT_MINIMUM (600 * USEC_PER_SEC) | |
fcb51238 | 36 | |
f311a62b PF |
37 | /* what to request from the server, addresses (IA_NA) and/or prefixes (IA_PD) */ |
38 | enum { | |
39 | DHCP6_REQUEST_IA_NA = 1, | |
40 | DHCP6_REQUEST_IA_TA = 2, /* currently not used */ | |
41 | DHCP6_REQUEST_IA_PD = 4, | |
42 | }; | |
43 | ||
139b011a | 44 | struct sd_dhcp6_client { |
3733eec3 | 45 | unsigned n_ref; |
139b011a PF |
46 | |
47 | enum DHCP6State state; | |
48 | sd_event *event; | |
49 | int event_priority; | |
2f8e7633 | 50 | int ifindex; |
61a9fa8f | 51 | char *ifname; |
2805536b | 52 | DHCP6Address hint_pd_prefix; |
c601ebf7 | 53 | struct in6_addr local_address; |
76253e73 DW |
54 | uint8_t mac_addr[MAX_MAC_ADDR_LEN]; |
55 | size_t mac_addr_len; | |
56 | uint16_t arp_type; | |
f12abb48 | 57 | DHCP6IA ia_na; |
dce6563f | 58 | DHCP6IA ia_pd; |
9a7225de PF |
59 | sd_event_source *timeout_t1; |
60 | sd_event_source *timeout_t2; | |
1346489f | 61 | unsigned request; |
a9aff361 | 62 | be32_t transaction_id; |
346e13a2 | 63 | usec_t transaction_start; |
631bbe71 | 64 | struct sd_dhcp6_lease *lease; |
a9aff361 | 65 | int fd; |
bbfa43ca | 66 | bool information_request; |
8217ed5e | 67 | bool iaid_set; |
da6fe470 | 68 | be16_t *req_opts; |
da6fe470 | 69 | size_t req_opts_len; |
8006aa32 | 70 | char *fqdn; |
de8d6e55 | 71 | char *mudurl; |
33923925 | 72 | char **user_class; |
73c8ced7 | 73 | char **vendor_class; |
a9aff361 | 74 | sd_event_source *receive_message; |
d1b0afe3 PF |
75 | usec_t retransmit_time; |
76 | uint8_t retransmit_count; | |
77 | sd_event_source *timeout_resend; | |
78 | sd_event_source *timeout_resend_expire; | |
45aa74c7 | 79 | sd_dhcp6_client_callback_t callback; |
139b011a | 80 | void *userdata; |
764aad62 | 81 | struct duid duid; |
66eac120 | 82 | size_t duid_len; |
fcb51238 YW |
83 | usec_t information_request_time_usec; |
84 | usec_t information_refresh_time_usec; | |
e7d5fe17 | 85 | OrderedHashmap *extra_options; |
99ccb8ff | 86 | OrderedHashmap *vendor_options; |
139b011a PF |
87 | }; |
88 | ||
da6fe470 | 89 | static const uint16_t default_req_opts[] = { |
2c1ab8ca BG |
90 | SD_DHCP6_OPTION_DNS_SERVERS, |
91 | SD_DHCP6_OPTION_DOMAIN_LIST, | |
92 | SD_DHCP6_OPTION_NTP_SERVER, | |
93 | SD_DHCP6_OPTION_SNTP_SERVERS, | |
da6fe470 PF |
94 | }; |
95 | ||
a9aff361 PF |
96 | const char * dhcp6_message_type_table[_DHCP6_MESSAGE_MAX] = { |
97 | [DHCP6_SOLICIT] = "SOLICIT", | |
98 | [DHCP6_ADVERTISE] = "ADVERTISE", | |
99 | [DHCP6_REQUEST] = "REQUEST", | |
100 | [DHCP6_CONFIRM] = "CONFIRM", | |
101 | [DHCP6_RENEW] = "RENEW", | |
102 | [DHCP6_REBIND] = "REBIND", | |
103 | [DHCP6_REPLY] = "REPLY", | |
104 | [DHCP6_RELEASE] = "RELEASE", | |
105 | [DHCP6_DECLINE] = "DECLINE", | |
106 | [DHCP6_RECONFIGURE] = "RECONFIGURE", | |
107 | [DHCP6_INFORMATION_REQUEST] = "INFORMATION-REQUEST", | |
108 | [DHCP6_RELAY_FORW] = "RELAY-FORW", | |
109 | [DHCP6_RELAY_REPL] = "RELAY-REPL", | |
110 | }; | |
111 | ||
112 | DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_type, int); | |
113 | ||
631bbe71 | 114 | const char * dhcp6_message_status_table[_DHCP6_STATUS_MAX] = { |
76643fed SS |
115 | [DHCP6_STATUS_SUCCESS] = "Success", |
116 | [DHCP6_STATUS_UNSPEC_FAIL] = "Unspecified failure", | |
117 | [DHCP6_STATUS_NO_ADDRS_AVAIL] = "No addresses available", | |
118 | [DHCP6_STATUS_NO_BINDING] = "Binding unavailable", | |
119 | [DHCP6_STATUS_NOT_ON_LINK] = "Not on link", | |
120 | [DHCP6_STATUS_USE_MULTICAST] = "Use multicast", | |
121 | [DHCP6_STATUS_NO_PREFIX_AVAIL] = "No prefix available", | |
122 | [DHCP6_STATUS_UNKNOWN_QUERY_TYPE] = "Unknown query type", | |
123 | [DHCP6_STATUS_MALFORMED_QUERY] = "Malformed query", | |
124 | [DHCP6_STATUS_NOT_CONFIGURED] = "Not configured", | |
125 | [DHCP6_STATUS_NOT_ALLOWED] = "Not allowed", | |
126 | [DHCP6_STATUS_QUERY_TERMINATED] = "Query terminated", | |
127 | [DHCP6_STATUS_DATA_MISSING] = "Data missing", | |
128 | [DHCP6_STATUS_CATCHUP_COMPLETE] = "Catch up complete", | |
129 | [DHCP6_STATUS_NOT_SUPPORTED] = "Not supported", | |
130 | [DHCP6_STATUS_TLS_CONNECTION_REFUSED] = "TLS connection refused", | |
131 | [DHCP6_STATUS_ADDRESS_IN_USE] = "Address in use", | |
132 | [DHCP6_STATUS_CONFIGURATION_CONFLICT] = "Configuration conflict", | |
133 | [DHCP6_STATUS_MISSING_BINDING_INFORMATION] = "Missing binding information", | |
134 | [DHCP6_STATUS_OUTDATED_BINDING_INFORMATION] = "Outdated binding information", | |
135 | [DHCP6_STATUS_SERVER_SHUTTING_DOWN] = "Server shutting down", | |
136 | [DHCP6_STATUS_DNS_UPDATE_NOT_SUPPORTED] = "DNS update not supported", | |
137 | [DHCP6_STATUS_EXCESSIVE_TIME_SKEW] = "Excessive time skew", | |
631bbe71 PF |
138 | }; |
139 | ||
140 | DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_status, int); | |
141 | ||
3f0c075f | 142 | #define DHCP6_CLIENT_DONT_DESTROY(client) \ |
4afd3348 | 143 | _cleanup_(sd_dhcp6_client_unrefp) _unused_ sd_dhcp6_client *_dont_destroy_##client = sd_dhcp6_client_ref(client) |
3f0c075f | 144 | |
c3e2adea PF |
145 | static int client_start(sd_dhcp6_client *client, enum DHCP6State state); |
146 | ||
4b558378 ZJS |
147 | int sd_dhcp6_client_set_callback( |
148 | sd_dhcp6_client *client, | |
149 | sd_dhcp6_client_callback_t cb, | |
150 | void *userdata) { | |
45aa74c7 | 151 | |
139b011a PF |
152 | assert_return(client, -EINVAL); |
153 | ||
45aa74c7 | 154 | client->callback = cb; |
139b011a PF |
155 | client->userdata = userdata; |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
2f8e7633 | 160 | int sd_dhcp6_client_set_ifindex(sd_dhcp6_client *client, int ifindex) { |
2f8e7633 | 161 | assert_return(client, -EINVAL); |
7fa69c0a | 162 | assert_return(ifindex > 0, -EINVAL); |
080e5c2f | 163 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); |
d7c9c21f | 164 | |
2f8e7633 | 165 | client->ifindex = ifindex; |
139b011a PF |
166 | return 0; |
167 | } | |
168 | ||
61a9fa8f YW |
169 | int sd_dhcp6_client_set_ifname(sd_dhcp6_client *client, const char *ifname) { |
170 | assert_return(client, -EINVAL); | |
171 | assert_return(ifname, -EINVAL); | |
172 | ||
173 | if (!ifname_valid_full(ifname, IFNAME_VALID_ALTERNATIVE)) | |
174 | return -EINVAL; | |
175 | ||
176 | return free_and_strdup(&client->ifname, ifname); | |
177 | } | |
178 | ||
179 | const char *sd_dhcp6_client_get_ifname(sd_dhcp6_client *client) { | |
180 | if (!client) | |
181 | return NULL; | |
182 | ||
183 | return get_ifname(client->ifindex, &client->ifname); | |
184 | } | |
185 | ||
4b558378 ZJS |
186 | int sd_dhcp6_client_set_local_address( |
187 | sd_dhcp6_client *client, | |
188 | const struct in6_addr *local_address) { | |
189 | ||
c601ebf7 TG |
190 | assert_return(client, -EINVAL); |
191 | assert_return(local_address, -EINVAL); | |
94876904 | 192 | assert_return(in6_addr_is_link_local(local_address) > 0, -EINVAL); |
080e5c2f | 193 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); |
c601ebf7 TG |
194 | |
195 | client->local_address = *local_address; | |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
0ae0e5cd LP |
200 | int sd_dhcp6_client_set_mac( |
201 | sd_dhcp6_client *client, | |
202 | const uint8_t *addr, size_t addr_len, | |
203 | uint16_t arp_type) { | |
204 | ||
139b011a | 205 | assert_return(client, -EINVAL); |
76253e73 | 206 | assert_return(addr, -EINVAL); |
1d370b2c | 207 | assert_return(addr_len <= MAX_MAC_ADDR_LEN, -EINVAL); |
080e5c2f | 208 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); |
d7c9c21f | 209 | |
76253e73 DW |
210 | if (arp_type == ARPHRD_ETHER) |
211 | assert_return(addr_len == ETH_ALEN, -EINVAL); | |
212 | else if (arp_type == ARPHRD_INFINIBAND) | |
213 | assert_return(addr_len == INFINIBAND_ALEN, -EINVAL); | |
1d370b2c JT |
214 | else { |
215 | client->arp_type = ARPHRD_NONE; | |
216 | client->mac_addr_len = 0; | |
217 | return 0; | |
218 | } | |
76253e73 DW |
219 | |
220 | if (client->mac_addr_len == addr_len && | |
221 | memcmp(&client->mac_addr, addr, addr_len) == 0) | |
222 | return 0; | |
223 | ||
224 | memcpy(&client->mac_addr, addr, addr_len); | |
225 | client->mac_addr_len = addr_len; | |
226 | client->arp_type = arp_type; | |
139b011a PF |
227 | |
228 | return 0; | |
229 | } | |
230 | ||
2805536b SS |
231 | int sd_dhcp6_client_set_prefix_delegation_hint( |
232 | sd_dhcp6_client *client, | |
233 | uint8_t prefixlen, | |
234 | const struct in6_addr *pd_address) { | |
235 | ||
236 | assert_return(client, -EINVAL); | |
237 | assert_return(pd_address, -EINVAL); | |
080e5c2f | 238 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); |
2805536b SS |
239 | |
240 | client->hint_pd_prefix.iapdprefix.address = *pd_address; | |
241 | client->hint_pd_prefix.iapdprefix.prefixlen = prefixlen; | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
99ccb8ff SS |
246 | int sd_dhcp6_client_add_vendor_option(sd_dhcp6_client *client, sd_dhcp6_option *v) { |
247 | int r; | |
248 | ||
249 | assert_return(client, -EINVAL); | |
250 | assert_return(v, -EINVAL); | |
251 | ||
02288f3e | 252 | r = ordered_hashmap_ensure_put(&client->vendor_options, &dhcp6_option_hash_ops, v, v); |
99ccb8ff SS |
253 | if (r < 0) |
254 | return r; | |
255 | ||
256 | sd_dhcp6_option_ref(v); | |
257 | ||
258 | return 1; | |
259 | } | |
260 | ||
0ae0e5cd | 261 | static int client_ensure_duid(sd_dhcp6_client *client) { |
cc22955c TH |
262 | if (client->duid_len != 0) |
263 | return 0; | |
0ae0e5cd | 264 | |
cc22955c TH |
265 | return dhcp_identifier_set_duid_en(&client->duid, &client->duid_len); |
266 | } | |
267 | ||
d7df2fd3 ZJS |
268 | /** |
269 | * Sets DUID. If duid is non-null, the DUID is set to duid_type + duid | |
270 | * without further modification. Otherwise, if duid_type is supported, DUID | |
271 | * is set based on that type. Otherwise, an error is returned. | |
272 | */ | |
7e90a499 | 273 | static int dhcp6_client_set_duid_internal( |
4b558378 ZJS |
274 | sd_dhcp6_client *client, |
275 | uint16_t duid_type, | |
f7a92d1a | 276 | const void *duid, |
7e90a499 YW |
277 | size_t duid_len, |
278 | usec_t llt_time) { | |
413708d1 | 279 | int r; |
27eba50e | 280 | |
66eac120 | 281 | assert_return(client, -EINVAL); |
d7df2fd3 | 282 | assert_return(duid_len == 0 || duid != NULL, -EINVAL); |
080e5c2f | 283 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); |
c83321e6 | 284 | |
1d6cc5d0 | 285 | if (duid) { |
ab4a88bc TH |
286 | r = dhcp_validate_duid_len(duid_type, duid_len, true); |
287 | if (r < 0) { | |
288 | r = dhcp_validate_duid_len(duid_type, duid_len, false); | |
289 | if (r < 0) | |
a339859f | 290 | return log_dhcp6_client_errno(client, r, "Failed to validate length of DUID: %m"); |
01bcea49 LP |
291 | |
292 | log_dhcp6_client(client, "Using DUID of type %u of incorrect length, proceeding.", duid_type); | |
ab4a88bc | 293 | } |
d7df2fd3 | 294 | |
413708d1 VK |
295 | client->duid.type = htobe16(duid_type); |
296 | memcpy(&client->duid.raw.data, duid, duid_len); | |
d7df2fd3 | 297 | client->duid_len = sizeof(client->duid.type) + duid_len; |
d7df2fd3 | 298 | } else |
27eba50e | 299 | switch (duid_type) { |
335f80a6 | 300 | case DUID_TYPE_LLT: |
339697f0 | 301 | if (client->mac_addr_len == 0) |
a339859f | 302 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EOPNOTSUPP), "Failed to set DUID-LLT, MAC address is not set."); |
335f80a6 | 303 | |
53253d9c | 304 | r = dhcp_identifier_set_duid_llt(&client->duid, llt_time, client->mac_addr, client->mac_addr_len, client->arp_type, &client->duid_len); |
335f80a6 | 305 | if (r < 0) |
a339859f | 306 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-LLT: %m"); |
335f80a6 | 307 | break; |
27eba50e YW |
308 | case DUID_TYPE_EN: |
309 | r = dhcp_identifier_set_duid_en(&client->duid, &client->duid_len); | |
310 | if (r < 0) | |
a339859f | 311 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-EN: %m"); |
27eba50e | 312 | break; |
335f80a6 | 313 | case DUID_TYPE_LL: |
339697f0 | 314 | if (client->mac_addr_len == 0) |
a339859f | 315 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EOPNOTSUPP), "Failed to set DUID-LL, MAC address is not set."); |
335f80a6 YW |
316 | |
317 | r = dhcp_identifier_set_duid_ll(&client->duid, client->mac_addr, client->mac_addr_len, client->arp_type, &client->duid_len); | |
318 | if (r < 0) | |
a339859f | 319 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-LL: %m"); |
335f80a6 | 320 | break; |
27eba50e YW |
321 | case DUID_TYPE_UUID: |
322 | r = dhcp_identifier_set_duid_uuid(&client->duid, &client->duid_len); | |
323 | if (r < 0) | |
a339859f | 324 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-UUID: %m"); |
27eba50e YW |
325 | break; |
326 | default: | |
a339859f | 327 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EINVAL), "Invalid DUID type"); |
27eba50e | 328 | } |
fe4b2156 | 329 | |
413708d1 VK |
330 | return 0; |
331 | } | |
332 | ||
7e90a499 YW |
333 | int sd_dhcp6_client_set_duid( |
334 | sd_dhcp6_client *client, | |
335 | uint16_t duid_type, | |
336 | const void *duid, | |
337 | size_t duid_len) { | |
338 | return dhcp6_client_set_duid_internal(client, duid_type, duid, duid_len, 0); | |
339 | } | |
340 | ||
341 | int sd_dhcp6_client_set_duid_llt( | |
342 | sd_dhcp6_client *client, | |
343 | usec_t llt_time) { | |
344 | return dhcp6_client_set_duid_internal(client, DUID_TYPE_LLT, NULL, 0, llt_time); | |
345 | } | |
346 | ||
6b7d5b6e SS |
347 | static const char* const dhcp6_duid_type_table[_DUID_TYPE_MAX] = { |
348 | [DUID_TYPE_LLT] = "DUID-LLT", | |
349 | [DUID_TYPE_EN] = "DUID-EN/Vendor", | |
350 | [DUID_TYPE_LL] = "DUID-LL", | |
351 | [DUID_TYPE_UUID] = "UUID", | |
352 | }; | |
353 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(dhcp6_duid_type, DUIDType); | |
354 | ||
355 | int sd_dhcp6_client_duid_as_string( | |
356 | sd_dhcp6_client *client, | |
357 | char **duid) { | |
358 | _cleanup_free_ char *p = NULL, *s = NULL, *t = NULL; | |
359 | const char *v; | |
360 | int r; | |
361 | ||
362 | assert_return(client, -EINVAL); | |
363 | assert_return(client->duid_len > 0, -ENODATA); | |
361eb412 | 364 | assert_return(duid, -EINVAL); |
6b7d5b6e SS |
365 | |
366 | v = dhcp6_duid_type_to_string(be16toh(client->duid.type)); | |
367 | if (v) { | |
368 | s = strdup(v); | |
369 | if (!s) | |
370 | return -ENOMEM; | |
371 | } else { | |
372 | r = asprintf(&s, "%0x", client->duid.type); | |
373 | if (r < 0) | |
374 | return -ENOMEM; | |
375 | } | |
376 | ||
377 | t = hexmem(&client->duid.raw.data, client->duid_len); | |
378 | if (!t) | |
379 | return -ENOMEM; | |
380 | ||
381 | p = strjoin(s, ":", t); | |
382 | if (!p) | |
383 | return -ENOMEM; | |
384 | ||
385 | *duid = TAKE_PTR(p); | |
386 | ||
387 | return 0; | |
388 | } | |
389 | ||
413708d1 VK |
390 | int sd_dhcp6_client_set_iaid(sd_dhcp6_client *client, uint32_t iaid) { |
391 | assert_return(client, -EINVAL); | |
080e5c2f | 392 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); |
413708d1 | 393 | |
e0026dcb | 394 | client->ia_na.ia_na.id = htobe32(iaid); |
dce6563f | 395 | client->ia_pd.ia_pd.id = htobe32(iaid); |
8217ed5e | 396 | client->iaid_set = true; |
66eac120 DW |
397 | |
398 | return 0; | |
399 | } | |
400 | ||
d69d4038 SS |
401 | int sd_dhcp6_client_get_iaid(sd_dhcp6_client *client, uint32_t *iaid) { |
402 | assert_return(client, -EINVAL); | |
403 | assert_return(iaid, -EINVAL); | |
404 | ||
405 | if (!client->iaid_set) | |
406 | return -ENODATA; | |
407 | ||
408 | *iaid = be32toh(client->ia_na.ia_na.id); | |
409 | ||
410 | return 0; | |
411 | } | |
412 | ||
8006aa32 SA |
413 | int sd_dhcp6_client_set_fqdn( |
414 | sd_dhcp6_client *client, | |
415 | const char *fqdn) { | |
416 | ||
417 | assert_return(client, -EINVAL); | |
418 | ||
419 | /* Make sure FQDN qualifies as DNS and as Linux hostname */ | |
420 | if (fqdn && | |
52ef5dd7 | 421 | !(hostname_is_valid(fqdn, 0) && dns_name_is_valid(fqdn) > 0)) |
8006aa32 SA |
422 | return -EINVAL; |
423 | ||
424 | return free_and_strdup(&client->fqdn, fqdn); | |
425 | } | |
426 | ||
04c01369 | 427 | int sd_dhcp6_client_set_information_request(sd_dhcp6_client *client, int enabled) { |
bbfa43ca | 428 | assert_return(client, -EINVAL); |
080e5c2f | 429 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); |
d7c9c21f | 430 | |
bbfa43ca PF |
431 | client->information_request = enabled; |
432 | ||
433 | return 0; | |
434 | } | |
435 | ||
04c01369 | 436 | int sd_dhcp6_client_get_information_request(sd_dhcp6_client *client, int *enabled) { |
bbfa43ca PF |
437 | assert_return(client, -EINVAL); |
438 | assert_return(enabled, -EINVAL); | |
439 | ||
440 | *enabled = client->information_request; | |
441 | ||
442 | return 0; | |
443 | } | |
444 | ||
0ae0e5cd | 445 | int sd_dhcp6_client_set_request_option(sd_dhcp6_client *client, uint16_t option) { |
da6fe470 PF |
446 | size_t t; |
447 | ||
448 | assert_return(client, -EINVAL); | |
449 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
450 | ||
2d3adfa6 | 451 | if (option <= 0 || option >= UINT8_MAX) |
da6fe470 | 452 | return -EINVAL; |
da6fe470 PF |
453 | |
454 | for (t = 0; t < client->req_opts_len; t++) | |
455 | if (client->req_opts[t] == htobe16(option)) | |
456 | return -EEXIST; | |
457 | ||
319a4f4b | 458 | if (!GREEDY_REALLOC(client->req_opts, client->req_opts_len + 1)) |
da6fe470 PF |
459 | return -ENOMEM; |
460 | ||
461 | client->req_opts[client->req_opts_len++] = htobe16(option); | |
462 | ||
463 | return 0; | |
464 | } | |
465 | ||
feb7d7a2 | 466 | int sd_dhcp6_client_set_request_mud_url(sd_dhcp6_client *client, const char *mudurl) { |
de8d6e55 SS |
467 | assert_return(client, -EINVAL); |
468 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
469 | assert_return(mudurl, -EINVAL); | |
2d3adfa6 | 470 | assert_return(strlen(mudurl) <= UINT8_MAX, -EINVAL); |
de8d6e55 SS |
471 | assert_return(http_url_is_valid(mudurl), -EINVAL); |
472 | ||
473 | return free_and_strdup(&client->mudurl, mudurl); | |
474 | } | |
475 | ||
5a99444e YW |
476 | int sd_dhcp6_client_set_request_user_class(sd_dhcp6_client *client, char * const *user_class) { |
477 | char * const *p; | |
478 | char **s; | |
33923925 SS |
479 | |
480 | assert_return(client, -EINVAL); | |
481 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
5a99444e | 482 | assert_return(!strv_isempty(user_class), -EINVAL); |
73c8ced7 | 483 | |
5a99444e YW |
484 | STRV_FOREACH(p, user_class) { |
485 | size_t len = strlen(*p); | |
33923925 | 486 | |
5a99444e YW |
487 | if (len > UINT16_MAX || len == 0) |
488 | return -EINVAL; | |
489 | } | |
33923925 | 490 | |
2d3adfa6 | 491 | s = strv_copy(user_class); |
33923925 SS |
492 | if (!s) |
493 | return -ENOMEM; | |
494 | ||
5a99444e | 495 | return strv_free_and_replace(client->user_class, s); |
33923925 SS |
496 | } |
497 | ||
019951ec YW |
498 | int sd_dhcp6_client_set_request_vendor_class(sd_dhcp6_client *client, char * const *vendor_class) { |
499 | char * const *p; | |
500 | char **s; | |
73c8ced7 SS |
501 | |
502 | assert_return(client, -EINVAL); | |
503 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
019951ec | 504 | assert_return(!strv_isempty(vendor_class), -EINVAL); |
73c8ced7 | 505 | |
019951ec YW |
506 | STRV_FOREACH(p, vendor_class) { |
507 | size_t len = strlen(*p); | |
508 | ||
509 | if (len > UINT16_MAX || len == 0) | |
510 | return -EINVAL; | |
511 | } | |
73c8ced7 SS |
512 | |
513 | s = strv_copy(vendor_class); | |
514 | if (!s) | |
515 | return -ENOMEM; | |
516 | ||
019951ec | 517 | return strv_free_and_replace(client->vendor_class, s); |
73c8ced7 SS |
518 | } |
519 | ||
d8c51121 PF |
520 | int sd_dhcp6_client_get_prefix_delegation(sd_dhcp6_client *client, int *delegation) { |
521 | assert_return(client, -EINVAL); | |
522 | assert_return(delegation, -EINVAL); | |
523 | ||
f311a62b | 524 | *delegation = FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD); |
d8c51121 PF |
525 | |
526 | return 0; | |
527 | } | |
528 | ||
529 | int sd_dhcp6_client_set_prefix_delegation(sd_dhcp6_client *client, int delegation) { | |
7c3de8f8 PF |
530 | assert_return(client, -EINVAL); |
531 | ||
f311a62b PF |
532 | SET_FLAG(client->request, DHCP6_REQUEST_IA_PD, delegation); |
533 | ||
534 | return 0; | |
535 | } | |
536 | ||
537 | int sd_dhcp6_client_get_address_request(sd_dhcp6_client *client, int *request) { | |
538 | assert_return(client, -EINVAL); | |
539 | assert_return(request, -EINVAL); | |
540 | ||
541 | *request = FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA); | |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
546 | int sd_dhcp6_client_set_address_request(sd_dhcp6_client *client, int request) { | |
547 | assert_return(client, -EINVAL); | |
548 | ||
549 | SET_FLAG(client->request, DHCP6_REQUEST_IA_NA, request); | |
7c3de8f8 PF |
550 | |
551 | return 0; | |
552 | } | |
553 | ||
b62f9008 | 554 | int sd_dhcp6_client_set_transaction_id(sd_dhcp6_client *client, uint32_t transaction_id) { |
d89a400e EV |
555 | assert_return(client, -EINVAL); |
556 | ||
557 | client->transaction_id = transaction_id; | |
558 | ||
559 | return 0; | |
560 | } | |
561 | ||
ea3b3a75 PF |
562 | int sd_dhcp6_client_get_lease(sd_dhcp6_client *client, sd_dhcp6_lease **ret) { |
563 | assert_return(client, -EINVAL); | |
ea3b3a75 PF |
564 | |
565 | if (!client->lease) | |
566 | return -ENOMSG; | |
567 | ||
3098562c TG |
568 | if (ret) |
569 | *ret = client->lease; | |
ea3b3a75 PF |
570 | |
571 | return 0; | |
572 | } | |
573 | ||
e7d5fe17 AD |
574 | int sd_dhcp6_client_add_option(sd_dhcp6_client *client, sd_dhcp6_option *v) { |
575 | int r; | |
576 | ||
577 | assert_return(client, -EINVAL); | |
578 | assert_return(v, -EINVAL); | |
579 | ||
02288f3e | 580 | r = ordered_hashmap_ensure_put(&client->extra_options, &dhcp6_option_hash_ops, UINT_TO_PTR(v->option), v); |
e7d5fe17 AD |
581 | if (r < 0) |
582 | return r; | |
583 | ||
584 | sd_dhcp6_option_ref(v); | |
585 | return 0; | |
586 | } | |
587 | ||
3f0c075f | 588 | static void client_notify(sd_dhcp6_client *client, int event) { |
45aa74c7 LP |
589 | assert(client); |
590 | ||
591 | if (client->callback) | |
592 | client->callback(client, event, client->userdata); | |
139b011a PF |
593 | } |
594 | ||
f8908727 | 595 | static int client_reset(sd_dhcp6_client *client) { |
a1140666 | 596 | assert(client); |
f8908727 | 597 | |
431a4bc8 | 598 | client->lease = sd_dhcp6_lease_unref(client->lease); |
4e3e6679 | 599 | |
a9aff361 PF |
600 | client->receive_message = |
601 | sd_event_source_unref(client->receive_message); | |
602 | ||
c3e2adea | 603 | client->transaction_id = 0; |
346e13a2 | 604 | client->transaction_start = 0; |
a9aff361 | 605 | |
d1b0afe3 PF |
606 | client->retransmit_time = 0; |
607 | client->retransmit_count = 0; | |
d1b0afe3 | 608 | |
c9393e8c YW |
609 | (void) event_source_disable(client->timeout_resend); |
610 | (void) event_source_disable(client->timeout_resend_expire); | |
611 | (void) event_source_disable(client->timeout_t1); | |
612 | (void) event_source_disable(client->timeout_t2); | |
213e759a | 613 | |
139b011a PF |
614 | client->state = DHCP6_STATE_STOPPED; |
615 | ||
616 | return 0; | |
617 | } | |
618 | ||
3f0c075f PF |
619 | static void client_stop(sd_dhcp6_client *client, int error) { |
620 | DHCP6_CLIENT_DONT_DESTROY(client); | |
139b011a | 621 | |
3f0c075f | 622 | assert(client); |
139b011a | 623 | |
3f0c075f PF |
624 | client_notify(client, error); |
625 | ||
626 | client_reset(client); | |
139b011a PF |
627 | } |
628 | ||
346e13a2 | 629 | static int client_send_message(sd_dhcp6_client *client, usec_t time_now) { |
a9aff361 PF |
630 | _cleanup_free_ DHCP6Message *message = NULL; |
631 | struct in6_addr all_servers = | |
632 | IN6ADDR_ALL_DHCP6_RELAY_AGENTS_AND_SERVERS_INIT; | |
e7d5fe17 | 633 | struct sd_dhcp6_option *j; |
a9aff361 PF |
634 | size_t len, optlen = 512; |
635 | uint8_t *opt; | |
636 | int r; | |
346e13a2 PF |
637 | usec_t elapsed_usec; |
638 | be16_t elapsed_time; | |
a9aff361 | 639 | |
a1140666 LP |
640 | assert(client); |
641 | ||
a9aff361 PF |
642 | len = sizeof(DHCP6Message) + optlen; |
643 | ||
644 | message = malloc0(len); | |
645 | if (!message) | |
646 | return -ENOMEM; | |
647 | ||
648 | opt = (uint8_t *)(message + 1); | |
649 | ||
650 | message->transaction_id = client->transaction_id; | |
651 | ||
652 | switch(client->state) { | |
bbfa43ca PF |
653 | case DHCP6_STATE_INFORMATION_REQUEST: |
654 | message->type = DHCP6_INFORMATION_REQUEST; | |
655 | ||
de8d6e55 SS |
656 | if (client->mudurl) { |
657 | r = dhcp6_option_append(&opt, &optlen, | |
658 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
659 | client->mudurl); | |
660 | if (r < 0) | |
661 | return r; | |
662 | } | |
663 | ||
bbfa43ca PF |
664 | break; |
665 | ||
a9aff361 PF |
666 | case DHCP6_STATE_SOLICITATION: |
667 | message->type = DHCP6_SOLICIT; | |
668 | ||
ed6ee219 | 669 | r = dhcp6_option_append(&opt, &optlen, |
2c1ab8ca | 670 | SD_DHCP6_OPTION_RAPID_COMMIT, 0, NULL); |
926695f1 TA |
671 | if (r < 0) |
672 | return r; | |
ed6ee219 | 673 | |
f311a62b PF |
674 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
675 | r = dhcp6_option_append_ia(&opt, &optlen, | |
676 | &client->ia_na); | |
677 | if (r < 0) | |
678 | return r; | |
679 | } | |
a9aff361 | 680 | |
8006aa32 SA |
681 | if (client->fqdn) { |
682 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
683 | if (r < 0) | |
684 | return r; | |
685 | } | |
686 | ||
de8d6e55 SS |
687 | if (client->mudurl) { |
688 | r = dhcp6_option_append(&opt, &optlen, | |
689 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
690 | client->mudurl); | |
691 | if (r < 0) | |
692 | return r; | |
693 | } | |
694 | ||
33923925 SS |
695 | if (client->user_class) { |
696 | r = dhcp6_option_append_user_class(&opt, &optlen, client->user_class); | |
697 | if (r < 0) | |
698 | return r; | |
699 | } | |
700 | ||
73c8ced7 SS |
701 | if (client->vendor_class) { |
702 | r = dhcp6_option_append_vendor_class(&opt, &optlen, client->vendor_class); | |
703 | if (r < 0) | |
704 | return r; | |
705 | } | |
706 | ||
99ccb8ff SS |
707 | if (!ordered_hashmap_isempty(client->vendor_options)) { |
708 | r = dhcp6_option_append_vendor_option(&opt, &optlen, | |
709 | client->vendor_options); | |
710 | if (r < 0) | |
711 | return r; | |
712 | } | |
713 | ||
f311a62b | 714 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
73b49d43 | 715 | r = dhcp6_option_append_pd(&opt, &optlen, &client->ia_pd, &client->hint_pd_prefix); |
7c3de8f8 PF |
716 | if (r < 0) |
717 | return r; | |
7c3de8f8 PF |
718 | } |
719 | ||
7246333c PF |
720 | break; |
721 | ||
722 | case DHCP6_STATE_REQUEST: | |
3dc34fcc PF |
723 | case DHCP6_STATE_RENEW: |
724 | ||
725 | if (client->state == DHCP6_STATE_REQUEST) | |
726 | message->type = DHCP6_REQUEST; | |
727 | else | |
728 | message->type = DHCP6_RENEW; | |
7246333c | 729 | |
2c1ab8ca | 730 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_SERVERID, |
7246333c PF |
731 | client->lease->serverid_len, |
732 | client->lease->serverid); | |
733 | if (r < 0) | |
734 | return r; | |
735 | ||
26a63b81 | 736 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA) && client->lease->ia.addresses) { |
f311a62b PF |
737 | r = dhcp6_option_append_ia(&opt, &optlen, |
738 | &client->lease->ia); | |
739 | if (r < 0) | |
740 | return r; | |
741 | } | |
a9aff361 | 742 | |
8006aa32 SA |
743 | if (client->fqdn) { |
744 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
745 | if (r < 0) | |
746 | return r; | |
747 | } | |
748 | ||
de8d6e55 SS |
749 | if (client->mudurl) { |
750 | r = dhcp6_option_append(&opt, &optlen, | |
751 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
752 | client->mudurl); | |
753 | if (r < 0) | |
754 | return r; | |
755 | } | |
756 | ||
33923925 SS |
757 | if (client->user_class) { |
758 | r = dhcp6_option_append_user_class(&opt, &optlen, client->user_class); | |
759 | if (r < 0) | |
760 | return r; | |
761 | } | |
762 | ||
73c8ced7 SS |
763 | if (client->vendor_class) { |
764 | r = dhcp6_option_append_vendor_class(&opt, &optlen, client->vendor_class); | |
765 | if (r < 0) | |
766 | return r; | |
767 | } | |
768 | ||
99ccb8ff SS |
769 | if (!ordered_hashmap_isempty(client->vendor_options)) { |
770 | r = dhcp6_option_append_vendor_option(&opt, &optlen, client->vendor_options); | |
771 | if (r < 0) | |
772 | return r; | |
773 | } | |
774 | ||
26a63b81 | 775 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD) && client->lease->pd.addresses) { |
73b49d43 | 776 | r = dhcp6_option_append_pd(&opt, &optlen, &client->lease->pd, NULL); |
7c3de8f8 PF |
777 | if (r < 0) |
778 | return r; | |
7c3de8f8 PF |
779 | } |
780 | ||
a9aff361 PF |
781 | break; |
782 | ||
3dc34fcc PF |
783 | case DHCP6_STATE_REBIND: |
784 | message->type = DHCP6_REBIND; | |
785 | ||
f311a62b PF |
786 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA)) { |
787 | r = dhcp6_option_append_ia(&opt, &optlen, &client->lease->ia); | |
788 | if (r < 0) | |
789 | return r; | |
790 | } | |
3dc34fcc | 791 | |
8006aa32 SA |
792 | if (client->fqdn) { |
793 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
794 | if (r < 0) | |
795 | return r; | |
796 | } | |
797 | ||
de8d6e55 SS |
798 | if (client->mudurl) { |
799 | r = dhcp6_option_append(&opt, &optlen, | |
800 | SD_DHCP6_OPTION_MUD_URL, strlen(client->mudurl), | |
801 | client->mudurl); | |
802 | if (r < 0) | |
803 | return r; | |
804 | } | |
805 | ||
33923925 SS |
806 | if (client->user_class) { |
807 | r = dhcp6_option_append_user_class(&opt, &optlen, client->user_class); | |
808 | if (r < 0) | |
809 | return r; | |
810 | } | |
811 | ||
73c8ced7 SS |
812 | if (client->vendor_class) { |
813 | r = dhcp6_option_append_vendor_class(&opt, &optlen, client->vendor_class); | |
814 | if (r < 0) | |
815 | return r; | |
816 | } | |
817 | ||
99ccb8ff SS |
818 | if (!ordered_hashmap_isempty(client->vendor_options)) { |
819 | r = dhcp6_option_append_vendor_option(&opt, &optlen, client->vendor_options); | |
820 | if (r < 0) | |
821 | return r; | |
822 | } | |
823 | ||
f311a62b | 824 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD)) { |
73b49d43 | 825 | r = dhcp6_option_append_pd(&opt, &optlen, &client->lease->pd, NULL); |
7c3de8f8 PF |
826 | if (r < 0) |
827 | return r; | |
7c3de8f8 PF |
828 | } |
829 | ||
3dc34fcc PF |
830 | break; |
831 | ||
a9aff361 | 832 | case DHCP6_STATE_STOPPED: |
a34b57c0 | 833 | case DHCP6_STATE_BOUND: |
a9aff361 PF |
834 | return -EINVAL; |
835 | } | |
836 | ||
2c1ab8ca | 837 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ORO, |
da6fe470 PF |
838 | client->req_opts_len * sizeof(be16_t), |
839 | client->req_opts); | |
840 | if (r < 0) | |
841 | return r; | |
842 | ||
ccd1fc2f | 843 | assert(client->duid_len); |
2c1ab8ca | 844 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_CLIENTID, |
66eac120 | 845 | client->duid_len, &client->duid); |
7246333c PF |
846 | if (r < 0) |
847 | return r; | |
848 | ||
346e13a2 PF |
849 | elapsed_usec = time_now - client->transaction_start; |
850 | if (elapsed_usec < 0xffff * USEC_PER_MSEC * 10) | |
851 | elapsed_time = htobe16(elapsed_usec / USEC_PER_MSEC / 10); | |
852 | else | |
853 | elapsed_time = 0xffff; | |
854 | ||
2c1ab8ca | 855 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ELAPSED_TIME, |
346e13a2 PF |
856 | sizeof(elapsed_time), &elapsed_time); |
857 | if (r < 0) | |
858 | return r; | |
859 | ||
90e74a66 | 860 | ORDERED_HASHMAP_FOREACH(j, client->extra_options) { |
e7d5fe17 AD |
861 | r = dhcp6_option_append(&opt, &optlen, j->option, j->length, j->data); |
862 | if (r < 0) | |
863 | return r; | |
864 | } | |
865 | ||
a9aff361 PF |
866 | r = dhcp6_network_send_udp_socket(client->fd, &all_servers, message, |
867 | len - optlen); | |
868 | if (r < 0) | |
869 | return r; | |
870 | ||
871 | log_dhcp6_client(client, "Sent %s", | |
872 | dhcp6_message_type_to_string(message->type)); | |
873 | ||
874 | return 0; | |
875 | } | |
876 | ||
4b558378 | 877 | static int client_timeout_t2(sd_event_source *s, uint64_t usec, void *userdata) { |
a34b57c0 PF |
878 | sd_dhcp6_client *client = userdata; |
879 | ||
a1140666 LP |
880 | assert(s); |
881 | assert(client); | |
882 | assert(client->lease); | |
a34b57c0 | 883 | |
c9393e8c | 884 | (void) event_source_disable(client->timeout_t2); |
a34b57c0 PF |
885 | |
886 | log_dhcp6_client(client, "Timeout T2"); | |
887 | ||
3dc34fcc PF |
888 | client_start(client, DHCP6_STATE_REBIND); |
889 | ||
a34b57c0 PF |
890 | return 0; |
891 | } | |
892 | ||
4b558378 | 893 | static int client_timeout_t1(sd_event_source *s, uint64_t usec, void *userdata) { |
a34b57c0 PF |
894 | sd_dhcp6_client *client = userdata; |
895 | ||
a1140666 LP |
896 | assert(s); |
897 | assert(client); | |
898 | assert(client->lease); | |
a34b57c0 | 899 | |
c9393e8c | 900 | (void) event_source_disable(client->timeout_t1); |
a34b57c0 PF |
901 | |
902 | log_dhcp6_client(client, "Timeout T1"); | |
903 | ||
3dc34fcc PF |
904 | client_start(client, DHCP6_STATE_RENEW); |
905 | ||
a34b57c0 PF |
906 | return 0; |
907 | } | |
908 | ||
4b558378 | 909 | static int client_timeout_resend_expire(sd_event_source *s, uint64_t usec, void *userdata) { |
d1b0afe3 | 910 | sd_dhcp6_client *client = userdata; |
3dc34fcc PF |
911 | DHCP6_CLIENT_DONT_DESTROY(client); |
912 | enum DHCP6State state; | |
d1b0afe3 PF |
913 | |
914 | assert(s); | |
915 | assert(client); | |
916 | assert(client->event); | |
917 | ||
3dc34fcc PF |
918 | state = client->state; |
919 | ||
10c9ce61 | 920 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE); |
d1b0afe3 | 921 | |
3dc34fcc PF |
922 | /* RFC 3315, section 18.1.4., says that "...the client may choose to |
923 | use a Solicit message to locate a new DHCP server..." */ | |
924 | if (state == DHCP6_STATE_REBIND) | |
925 | client_start(client, DHCP6_STATE_SOLICITATION); | |
926 | ||
d1b0afe3 PF |
927 | return 0; |
928 | } | |
929 | ||
930 | static usec_t client_timeout_compute_random(usec_t val) { | |
9de8a425 | 931 | return val - (random_u32() % USEC_PER_SEC) * val / 10 / USEC_PER_SEC; |
d1b0afe3 PF |
932 | } |
933 | ||
4b558378 | 934 | static int client_timeout_resend(sd_event_source *s, uint64_t usec, void *userdata) { |
d1b0afe3 PF |
935 | int r = 0; |
936 | sd_dhcp6_client *client = userdata; | |
4b4923e6 | 937 | usec_t time_now, init_retransmit_time = 0, max_retransmit_time = 0; |
5e913450 | 938 | usec_t max_retransmit_duration = 0; |
513a6fa8 | 939 | uint8_t max_retransmit_count = 0; |
d1b0afe3 PF |
940 | char time_string[FORMAT_TIMESPAN_MAX]; |
941 | ||
942 | assert(s); | |
943 | assert(client); | |
944 | assert(client->event); | |
945 | ||
c9393e8c | 946 | (void) event_source_disable(client->timeout_resend); |
d1b0afe3 PF |
947 | |
948 | switch (client->state) { | |
bbfa43ca PF |
949 | case DHCP6_STATE_INFORMATION_REQUEST: |
950 | init_retransmit_time = DHCP6_INF_TIMEOUT; | |
951 | max_retransmit_time = DHCP6_INF_MAX_RT; | |
952 | ||
953 | break; | |
954 | ||
d1b0afe3 | 955 | case DHCP6_STATE_SOLICITATION: |
7246333c PF |
956 | |
957 | if (client->retransmit_count && client->lease) { | |
958 | client_start(client, DHCP6_STATE_REQUEST); | |
959 | return 0; | |
960 | } | |
961 | ||
d1b0afe3 PF |
962 | init_retransmit_time = DHCP6_SOL_TIMEOUT; |
963 | max_retransmit_time = DHCP6_SOL_MAX_RT; | |
d1b0afe3 PF |
964 | |
965 | break; | |
966 | ||
7246333c PF |
967 | case DHCP6_STATE_REQUEST: |
968 | init_retransmit_time = DHCP6_REQ_TIMEOUT; | |
969 | max_retransmit_time = DHCP6_REQ_MAX_RT; | |
970 | max_retransmit_count = DHCP6_REQ_MAX_RC; | |
7246333c PF |
971 | |
972 | break; | |
973 | ||
3dc34fcc PF |
974 | case DHCP6_STATE_RENEW: |
975 | init_retransmit_time = DHCP6_REN_TIMEOUT; | |
976 | max_retransmit_time = DHCP6_REN_MAX_RT; | |
3dc34fcc PF |
977 | |
978 | /* RFC 3315, section 18.1.3. says max retransmit duration will | |
979 | be the remaining time until T2. Instead of setting MRD, | |
980 | wait for T2 to trigger with the same end result */ | |
3dc34fcc PF |
981 | |
982 | break; | |
983 | ||
984 | case DHCP6_STATE_REBIND: | |
985 | init_retransmit_time = DHCP6_REB_TIMEOUT; | |
986 | max_retransmit_time = DHCP6_REB_MAX_RT; | |
3dc34fcc | 987 | |
c9393e8c | 988 | if (event_source_is_enabled(client->timeout_resend_expire) <= 0) { |
3ae01632 YW |
989 | uint32_t expire = 0; |
990 | ||
991 | r = dhcp6_lease_ia_rebind_expire(&client->lease->ia, &expire); | |
3dc34fcc PF |
992 | if (r < 0) { |
993 | client_stop(client, r); | |
994 | return 0; | |
995 | } | |
996 | max_retransmit_duration = expire * USEC_PER_SEC; | |
997 | } | |
998 | ||
999 | break; | |
1000 | ||
d1b0afe3 | 1001 | case DHCP6_STATE_STOPPED: |
a34b57c0 | 1002 | case DHCP6_STATE_BOUND: |
d1b0afe3 PF |
1003 | return 0; |
1004 | } | |
1005 | ||
3ae01632 | 1006 | if (max_retransmit_count > 0 && |
d1b0afe3 | 1007 | client->retransmit_count >= max_retransmit_count) { |
10c9ce61 | 1008 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RETRANS_MAX); |
d1b0afe3 PF |
1009 | return 0; |
1010 | } | |
1011 | ||
fa94c34b | 1012 | r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now); |
d1b0afe3 PF |
1013 | if (r < 0) |
1014 | goto error; | |
1015 | ||
346e13a2 PF |
1016 | r = client_send_message(client, time_now); |
1017 | if (r >= 0) | |
1018 | client->retransmit_count++; | |
1019 | ||
3ae01632 | 1020 | if (client->retransmit_time == 0) { |
d1b0afe3 PF |
1021 | client->retransmit_time = |
1022 | client_timeout_compute_random(init_retransmit_time); | |
a9aff361 PF |
1023 | |
1024 | if (client->state == DHCP6_STATE_SOLICITATION) | |
1025 | client->retransmit_time += init_retransmit_time / 10; | |
1026 | ||
d1b0afe3 | 1027 | } else { |
3ae01632 | 1028 | if (max_retransmit_time > 0 && |
d1b0afe3 PF |
1029 | client->retransmit_time > max_retransmit_time / 2) |
1030 | client->retransmit_time = client_timeout_compute_random(max_retransmit_time); | |
1031 | else | |
1032 | client->retransmit_time += client_timeout_compute_random(client->retransmit_time); | |
1033 | } | |
1034 | ||
1035 | log_dhcp6_client(client, "Next retransmission in %s", | |
ed19c567 | 1036 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, client->retransmit_time, USEC_PER_SEC)); |
d1b0afe3 | 1037 | |
c9393e8c YW |
1038 | r = event_reset_time(client->event, &client->timeout_resend, |
1039 | clock_boottime_or_monotonic(), | |
1040 | time_now + client->retransmit_time, 10 * USEC_PER_MSEC, | |
1041 | client_timeout_resend, client, | |
1042 | client->event_priority, "dhcp6-resend-timer", true); | |
d1b0afe3 PF |
1043 | if (r < 0) |
1044 | goto error; | |
1045 | ||
3ae01632 | 1046 | if (max_retransmit_duration > 0 && event_source_is_enabled(client->timeout_resend_expire) <= 0) { |
d1b0afe3 PF |
1047 | |
1048 | log_dhcp6_client(client, "Max retransmission duration %"PRIu64" secs", | |
1049 | max_retransmit_duration / USEC_PER_SEC); | |
1050 | ||
c9393e8c YW |
1051 | r = event_reset_time(client->event, &client->timeout_resend_expire, |
1052 | clock_boottime_or_monotonic(), | |
1053 | time_now + max_retransmit_duration, USEC_PER_SEC, | |
1054 | client_timeout_resend_expire, client, | |
1055 | client->event_priority, "dhcp6-resend-expire-timer", true); | |
9021bb9f TG |
1056 | if (r < 0) |
1057 | goto error; | |
d1b0afe3 PF |
1058 | } |
1059 | ||
1060 | error: | |
1061 | if (r < 0) | |
1062 | client_stop(client, r); | |
1063 | ||
1064 | return 0; | |
1065 | } | |
1066 | ||
f12abb48 | 1067 | static int client_ensure_iaid(sd_dhcp6_client *client) { |
cfb5b380 | 1068 | int r; |
6d13616b | 1069 | uint32_t iaid; |
f12abb48 PF |
1070 | |
1071 | assert(client); | |
1072 | ||
8217ed5e | 1073 | if (client->iaid_set) |
f12abb48 PF |
1074 | return 0; |
1075 | ||
6d13616b | 1076 | r = dhcp_identifier_set_iaid(client->ifindex, client->mac_addr, client->mac_addr_len, true, &iaid); |
cfb5b380 TG |
1077 | if (r < 0) |
1078 | return r; | |
f12abb48 | 1079 | |
69b43997 PF |
1080 | client->ia_na.ia_na.id = iaid; |
1081 | client->ia_pd.ia_pd.id = iaid; | |
8217ed5e | 1082 | client->iaid_set = true; |
69b43997 | 1083 | |
f12abb48 PF |
1084 | return 0; |
1085 | } | |
1086 | ||
4b558378 ZJS |
1087 | static int client_parse_message( |
1088 | sd_dhcp6_client *client, | |
1089 | DHCP6Message *message, | |
1090 | size_t len, | |
1091 | sd_dhcp6_lease *lease) { | |
da07cf35 | 1092 | |
5c95a913 | 1093 | uint16_t ia_na_status = 0, ia_pd_status = 0; |
da07cf35 | 1094 | uint32_t lt_t1 = ~0, lt_t2 = ~0; |
5c95a913 | 1095 | usec_t irt = IRT_DEFAULT; |
da07cf35 | 1096 | bool clientid = false; |
3bc424a3 | 1097 | size_t pos = 0; |
631bbe71 | 1098 | int r; |
631bbe71 | 1099 | |
a1140666 LP |
1100 | assert(client); |
1101 | assert(message); | |
1102 | assert(len >= sizeof(DHCP6Message)); | |
1103 | assert(lease); | |
1104 | ||
44481a8b ZJS |
1105 | len -= sizeof(DHCP6Message); |
1106 | ||
3bc424a3 | 1107 | while (pos < len) { |
da07cf35 | 1108 | DHCP6Option *option = (DHCP6Option *) &message->options[pos]; |
c6b4f32a | 1109 | uint16_t optcode, optlen; |
3bc424a3 | 1110 | be32_t iaid_lease; |
5c95a913 | 1111 | int status; |
da07cf35 | 1112 | uint8_t *optval; |
3bc424a3 | 1113 | |
da07cf35 | 1114 | if (len < pos + offsetof(DHCP6Option, data)) |
3bc424a3 PF |
1115 | return -ENOBUFS; |
1116 | ||
1117 | optcode = be16toh(option->code); | |
1118 | optlen = be16toh(option->len); | |
1119 | optval = option->data; | |
1120 | ||
da07cf35 YW |
1121 | if (len < pos + offsetof(DHCP6Option, data) + optlen) |
1122 | return -ENOBUFS; | |
1123 | ||
631bbe71 | 1124 | switch (optcode) { |
2c1ab8ca | 1125 | case SD_DHCP6_OPTION_CLIENTID: |
631bbe71 PF |
1126 | if (clientid) { |
1127 | log_dhcp6_client(client, "%s contains multiple clientids", | |
1128 | dhcp6_message_type_to_string(message->type)); | |
1129 | return -EINVAL; | |
1130 | } | |
1131 | ||
66eac120 | 1132 | if (optlen != client->duid_len || |
631bbe71 PF |
1133 | memcmp(&client->duid, optval, optlen) != 0) { |
1134 | log_dhcp6_client(client, "%s DUID does not match", | |
1135 | dhcp6_message_type_to_string(message->type)); | |
1136 | ||
1137 | return -EINVAL; | |
1138 | } | |
1139 | clientid = true; | |
1140 | ||
1141 | break; | |
1142 | ||
2c1ab8ca | 1143 | case SD_DHCP6_OPTION_SERVERID: |
99f1d3fc ZJS |
1144 | r = dhcp6_lease_get_serverid(lease, NULL, NULL); |
1145 | if (r >= 0) { | |
631bbe71 PF |
1146 | log_dhcp6_client(client, "%s contains multiple serverids", |
1147 | dhcp6_message_type_to_string(message->type)); | |
1148 | return -EINVAL; | |
1149 | } | |
1150 | ||
1151 | r = dhcp6_lease_set_serverid(lease, optval, optlen); | |
1152 | if (r < 0) | |
1153 | return r; | |
1154 | ||
1155 | break; | |
1156 | ||
2c1ab8ca | 1157 | case SD_DHCP6_OPTION_PREFERENCE: |
631bbe71 PF |
1158 | if (optlen != 1) |
1159 | return -EINVAL; | |
1160 | ||
3bc424a3 | 1161 | r = dhcp6_lease_set_preference(lease, optval[0]); |
631bbe71 PF |
1162 | if (r < 0) |
1163 | return r; | |
1164 | ||
1165 | break; | |
1166 | ||
2c1ab8ca | 1167 | case SD_DHCP6_OPTION_STATUS_CODE: |
91c43f39 YW |
1168 | status = dhcp6_option_parse_status(option, optlen + sizeof(DHCP6Option)); |
1169 | if (status < 0) | |
1170 | return status; | |
1171 | ||
1172 | if (status > 0) { | |
631bbe71 PF |
1173 | log_dhcp6_client(client, "%s Status %s", |
1174 | dhcp6_message_type_to_string(message->type), | |
1175 | dhcp6_message_status_to_string(status)); | |
c6b4f32a | 1176 | |
631bbe71 PF |
1177 | return -EINVAL; |
1178 | } | |
1179 | ||
1180 | break; | |
1181 | ||
2c1ab8ca | 1182 | case SD_DHCP6_OPTION_IA_NA: |
bbfa43ca PF |
1183 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { |
1184 | log_dhcp6_client(client, "Information request ignoring IA NA option"); | |
1185 | ||
1186 | break; | |
1187 | } | |
1188 | ||
35388783 | 1189 | r = dhcp6_option_parse_ia(client, option, &lease->ia, &ia_na_status); |
631bbe71 PF |
1190 | if (r < 0 && r != -ENOMSG) |
1191 | return r; | |
1192 | ||
5c95a913 SS |
1193 | if (ia_na_status == DHCP6_STATUS_NO_ADDRS_AVAIL) { |
1194 | pos += offsetof(DHCP6Option, data) + optlen; | |
1195 | continue; | |
1196 | } | |
1197 | ||
631bbe71 PF |
1198 | r = dhcp6_lease_get_iaid(lease, &iaid_lease); |
1199 | if (r < 0) | |
1200 | return r; | |
1201 | ||
e0026dcb | 1202 | if (client->ia_na.ia_na.id != iaid_lease) { |
dce6563f PF |
1203 | log_dhcp6_client(client, "%s has wrong IAID for IA NA", |
1204 | dhcp6_message_type_to_string(message->type)); | |
1205 | return -EINVAL; | |
1206 | } | |
1207 | ||
b47fb949 PF |
1208 | if (lease->ia.addresses) { |
1209 | lt_t1 = MIN(lt_t1, be32toh(lease->ia.ia_na.lifetime_t1)); | |
1210 | lt_t2 = MIN(lt_t2, be32toh(lease->ia.ia_na.lifetime_t1)); | |
1211 | } | |
1212 | ||
dce6563f PF |
1213 | break; |
1214 | ||
1215 | case SD_DHCP6_OPTION_IA_PD: | |
1216 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { | |
1217 | log_dhcp6_client(client, "Information request ignoring IA PD option"); | |
1218 | ||
1219 | break; | |
1220 | } | |
1221 | ||
35388783 | 1222 | r = dhcp6_option_parse_ia(client, option, &lease->pd, &ia_pd_status); |
dce6563f PF |
1223 | if (r < 0 && r != -ENOMSG) |
1224 | return r; | |
1225 | ||
5c95a913 SS |
1226 | if (ia_pd_status == DHCP6_STATUS_NO_PREFIX_AVAIL) { |
1227 | pos += offsetof(DHCP6Option, data) + optlen; | |
1228 | continue; | |
1229 | } | |
1230 | ||
49228c75 | 1231 | r = dhcp6_lease_get_pd_iaid(lease, &iaid_lease); |
dce6563f PF |
1232 | if (r < 0) |
1233 | return r; | |
1234 | ||
1235 | if (client->ia_pd.ia_pd.id != iaid_lease) { | |
1236 | log_dhcp6_client(client, "%s has wrong IAID for IA PD", | |
631bbe71 PF |
1237 | dhcp6_message_type_to_string(message->type)); |
1238 | return -EINVAL; | |
1239 | } | |
1240 | ||
b47fb949 PF |
1241 | if (lease->pd.addresses) { |
1242 | lt_t1 = MIN(lt_t1, be32toh(lease->pd.ia_pd.lifetime_t1)); | |
1243 | lt_t2 = MIN(lt_t2, be32toh(lease->pd.ia_pd.lifetime_t2)); | |
1244 | } | |
1245 | ||
631bbe71 | 1246 | break; |
ed6ee219 | 1247 | |
2c1ab8ca | 1248 | case SD_DHCP6_OPTION_RAPID_COMMIT: |
ed6ee219 PF |
1249 | r = dhcp6_lease_set_rapid_commit(lease); |
1250 | if (r < 0) | |
1251 | return r; | |
1252 | ||
1253 | break; | |
7bd8e95d | 1254 | |
2c1ab8ca | 1255 | case SD_DHCP6_OPTION_DNS_SERVERS: |
7bd8e95d PF |
1256 | r = dhcp6_lease_set_dns(lease, optval, optlen); |
1257 | if (r < 0) | |
1258 | return r; | |
1259 | ||
1260 | break; | |
5da1b97f | 1261 | |
2c1ab8ca | 1262 | case SD_DHCP6_OPTION_DOMAIN_LIST: |
5da1b97f PF |
1263 | r = dhcp6_lease_set_domains(lease, optval, optlen); |
1264 | if (r < 0) | |
1265 | return r; | |
1266 | ||
1267 | break; | |
1268 | ||
2c1ab8ca | 1269 | case SD_DHCP6_OPTION_NTP_SERVER: |
6599680e PF |
1270 | r = dhcp6_lease_set_ntp(lease, optval, optlen); |
1271 | if (r < 0) | |
1272 | return r; | |
1273 | ||
1274 | break; | |
41e4615d | 1275 | |
2c1ab8ca | 1276 | case SD_DHCP6_OPTION_SNTP_SERVERS: |
41e4615d PF |
1277 | r = dhcp6_lease_set_sntp(lease, optval, optlen); |
1278 | if (r < 0) | |
1279 | return r; | |
1280 | ||
1281 | break; | |
fcb51238 | 1282 | |
c43eea9f BG |
1283 | case SD_DHCP6_OPTION_FQDN: |
1284 | r = dhcp6_lease_set_fqdn(lease, optval, optlen); | |
1285 | if (r < 0) | |
1286 | return r; | |
1287 | ||
1288 | break; | |
1289 | ||
fcb51238 | 1290 | case SD_DHCP6_OPTION_INFORMATION_REFRESH_TIME: |
6ffe71d0 YW |
1291 | if (optlen != 4) |
1292 | return -EINVAL; | |
1293 | ||
0eb5e6d3 | 1294 | irt = unaligned_read_be32((be32_t *) optval) * USEC_PER_SEC; |
fcb51238 | 1295 | break; |
631bbe71 | 1296 | } |
6599680e | 1297 | |
23976cb9 | 1298 | pos += offsetof(DHCP6Option, data) + optlen; |
631bbe71 PF |
1299 | } |
1300 | ||
5c95a913 SS |
1301 | if (ia_na_status > 0 && ia_pd_status > 0) { |
1302 | log_dhcp6_client(client, "No IA_PD prefix or IA_NA address received. Ignoring."); | |
1303 | return -EINVAL; | |
1304 | } | |
1305 | ||
1eeddba4 | 1306 | if (!clientid) { |
631bbe71 PF |
1307 | log_dhcp6_client(client, "%s has incomplete options", |
1308 | dhcp6_message_type_to_string(message->type)); | |
1309 | return -EINVAL; | |
1310 | } | |
1311 | ||
bbfa43ca | 1312 | if (client->state != DHCP6_STATE_INFORMATION_REQUEST) { |
99f1d3fc ZJS |
1313 | r = dhcp6_lease_get_serverid(lease, NULL, NULL); |
1314 | if (r < 0) { | |
bbfa43ca PF |
1315 | log_dhcp6_client(client, "%s has no server id", |
1316 | dhcp6_message_type_to_string(message->type)); | |
99f1d3fc ZJS |
1317 | return -EINVAL; |
1318 | } | |
b47fb949 | 1319 | |
99f1d3fc ZJS |
1320 | } else { |
1321 | if (lease->ia.addresses) { | |
1322 | lease->ia.ia_na.lifetime_t1 = htobe32(lt_t1); | |
1323 | lease->ia.ia_na.lifetime_t2 = htobe32(lt_t2); | |
1324 | } | |
b47fb949 | 1325 | |
99f1d3fc ZJS |
1326 | if (lease->pd.addresses) { |
1327 | lease->pd.ia_pd.lifetime_t1 = htobe32(lt_t1); | |
1328 | lease->pd.ia_pd.lifetime_t2 = htobe32(lt_t2); | |
1329 | } | |
bbfa43ca | 1330 | } |
631bbe71 | 1331 | |
fcb51238 YW |
1332 | client->information_refresh_time_usec = MAX(irt, IRT_MINIMUM); |
1333 | ||
21a9905c | 1334 | return 0; |
631bbe71 PF |
1335 | } |
1336 | ||
0ae0e5cd | 1337 | static int client_receive_reply(sd_dhcp6_client *client, DHCP6Message *reply, size_t len) { |
4afd3348 | 1338 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
ed6ee219 | 1339 | bool rapid_commit; |
a1140666 LP |
1340 | int r; |
1341 | ||
1342 | assert(client); | |
1343 | assert(reply); | |
a34b57c0 PF |
1344 | |
1345 | if (reply->type != DHCP6_REPLY) | |
ed6ee219 | 1346 | return 0; |
a34b57c0 PF |
1347 | |
1348 | r = dhcp6_lease_new(&lease); | |
1349 | if (r < 0) | |
1350 | return -ENOMEM; | |
1351 | ||
1352 | r = client_parse_message(client, reply, len, lease); | |
1353 | if (r < 0) | |
1354 | return r; | |
1355 | ||
ed6ee219 PF |
1356 | if (client->state == DHCP6_STATE_SOLICITATION) { |
1357 | r = dhcp6_lease_get_rapid_commit(lease, &rapid_commit); | |
1358 | if (r < 0) | |
1359 | return r; | |
1360 | ||
1361 | if (!rapid_commit) | |
1362 | return 0; | |
1363 | } | |
1364 | ||
431a4bc8 YW |
1365 | sd_dhcp6_lease_unref(client->lease); |
1366 | client->lease = TAKE_PTR(lease); | |
a34b57c0 PF |
1367 | |
1368 | return DHCP6_STATE_BOUND; | |
1369 | } | |
1370 | ||
0ae0e5cd | 1371 | static int client_receive_advertise(sd_dhcp6_client *client, DHCP6Message *advertise, size_t len) { |
4afd3348 | 1372 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
631bbe71 | 1373 | uint8_t pref_advertise = 0, pref_lease = 0; |
a1140666 | 1374 | int r; |
631bbe71 PF |
1375 | |
1376 | if (advertise->type != DHCP6_ADVERTISE) | |
ed6ee219 | 1377 | return 0; |
631bbe71 PF |
1378 | |
1379 | r = dhcp6_lease_new(&lease); | |
1380 | if (r < 0) | |
1381 | return r; | |
1382 | ||
1383 | r = client_parse_message(client, advertise, len, lease); | |
1384 | if (r < 0) | |
1385 | return r; | |
1386 | ||
1387 | r = dhcp6_lease_get_preference(lease, &pref_advertise); | |
1388 | if (r < 0) | |
1389 | return r; | |
1390 | ||
1391 | r = dhcp6_lease_get_preference(client->lease, &pref_lease); | |
bbfa43ca PF |
1392 | |
1393 | if (r < 0 || pref_advertise > pref_lease) { | |
431a4bc8 YW |
1394 | sd_dhcp6_lease_unref(client->lease); |
1395 | client->lease = TAKE_PTR(lease); | |
631bbe71 PF |
1396 | r = 0; |
1397 | } | |
1398 | ||
7246333c PF |
1399 | if (pref_advertise == 255 || client->retransmit_count > 1) |
1400 | r = DHCP6_STATE_REQUEST; | |
1401 | ||
631bbe71 PF |
1402 | return r; |
1403 | } | |
1404 | ||
004845d1 LP |
1405 | static int client_receive_message( |
1406 | sd_event_source *s, | |
1407 | int fd, uint32_t | |
1408 | revents, | |
1409 | void *userdata) { | |
1410 | ||
631bbe71 | 1411 | sd_dhcp6_client *client = userdata; |
3f0c075f | 1412 | DHCP6_CLIENT_DONT_DESTROY(client); |
0d43d2fc | 1413 | _cleanup_free_ DHCP6Message *message = NULL; |
4edc2c9b LP |
1414 | ssize_t buflen, len; |
1415 | int r = 0; | |
631bbe71 PF |
1416 | |
1417 | assert(s); | |
1418 | assert(client); | |
1419 | assert(client->event); | |
1420 | ||
4edc2c9b | 1421 | buflen = next_datagram_size_fd(fd); |
d46b79bb | 1422 | if (buflen == -ENETDOWN) |
22a3fd2d BG |
1423 | /* the link is down. Don't return an error or the I/O event |
1424 | source will be disconnected and we won't be able to receive | |
1425 | packets again when the link comes back. */ | |
1426 | return 0; | |
4edc2c9b LP |
1427 | if (buflen < 0) |
1428 | return buflen; | |
631bbe71 | 1429 | |
0d43d2fc | 1430 | message = malloc(buflen); |
631bbe71 PF |
1431 | if (!message) |
1432 | return -ENOMEM; | |
1433 | ||
cf447cb6 | 1434 | len = recv(fd, message, buflen, 0); |
0d43d2fc | 1435 | if (len < 0) { |
22a3fd2d BG |
1436 | /* see comment above for why we shouldn't error out on ENETDOWN. */ |
1437 | if (IN_SET(errno, EAGAIN, EINTR, ENETDOWN)) | |
0d43d2fc TG |
1438 | return 0; |
1439 | ||
bd9a7221 | 1440 | return log_dhcp6_client_errno(client, errno, "Could not receive message from UDP socket: %m"); |
0d43d2fc | 1441 | |
004845d1 LP |
1442 | } |
1443 | if ((size_t) len < sizeof(DHCP6Message)) { | |
1444 | log_dhcp6_client(client, "Too small to be DHCP6 message: ignoring"); | |
631bbe71 | 1445 | return 0; |
004845d1 | 1446 | } |
631bbe71 PF |
1447 | |
1448 | switch(message->type) { | |
1449 | case DHCP6_SOLICIT: | |
1450 | case DHCP6_REQUEST: | |
1451 | case DHCP6_CONFIRM: | |
1452 | case DHCP6_RENEW: | |
1453 | case DHCP6_REBIND: | |
1454 | case DHCP6_RELEASE: | |
1455 | case DHCP6_DECLINE: | |
1456 | case DHCP6_INFORMATION_REQUEST: | |
1457 | case DHCP6_RELAY_FORW: | |
1458 | case DHCP6_RELAY_REPL: | |
1459 | return 0; | |
1460 | ||
1461 | case DHCP6_ADVERTISE: | |
1462 | case DHCP6_REPLY: | |
1463 | case DHCP6_RECONFIGURE: | |
1464 | break; | |
1465 | ||
1466 | default: | |
bd9a7221 | 1467 | log_dhcp6_client(client, "Unknown message type %d", message->type); |
631bbe71 PF |
1468 | return 0; |
1469 | } | |
1470 | ||
1471 | if (client->transaction_id != (message->transaction_id & | |
1472 | htobe32(0x00ffffff))) | |
1473 | return 0; | |
1474 | ||
1475 | switch (client->state) { | |
bbfa43ca PF |
1476 | case DHCP6_STATE_INFORMATION_REQUEST: |
1477 | r = client_receive_reply(client, message, len); | |
1478 | if (r < 0) | |
1479 | return 0; | |
1480 | ||
10c9ce61 | 1481 | client_notify(client, SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST); |
bbfa43ca PF |
1482 | |
1483 | client_start(client, DHCP6_STATE_STOPPED); | |
1484 | ||
1485 | break; | |
1486 | ||
631bbe71 PF |
1487 | case DHCP6_STATE_SOLICITATION: |
1488 | r = client_receive_advertise(client, message, len); | |
1489 | ||
ed6ee219 | 1490 | if (r == DHCP6_STATE_REQUEST) { |
7246333c PF |
1491 | client_start(client, r); |
1492 | ||
ed6ee219 PF |
1493 | break; |
1494 | } | |
631bbe71 | 1495 | |
d7b34e38 | 1496 | _fallthrough_; /* for Solicitation Rapid Commit option check */ |
7246333c | 1497 | case DHCP6_STATE_REQUEST: |
3dc34fcc PF |
1498 | case DHCP6_STATE_RENEW: |
1499 | case DHCP6_STATE_REBIND: | |
1500 | ||
a34b57c0 PF |
1501 | r = client_receive_reply(client, message, len); |
1502 | if (r < 0) | |
1503 | return 0; | |
1504 | ||
1505 | if (r == DHCP6_STATE_BOUND) { | |
1506 | ||
1507 | r = client_start(client, DHCP6_STATE_BOUND); | |
1508 | if (r < 0) { | |
1509 | client_stop(client, r); | |
1510 | return 0; | |
1511 | } | |
1512 | ||
10c9ce61 | 1513 | client_notify(client, SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE); |
a34b57c0 PF |
1514 | } |
1515 | ||
1516 | break; | |
1517 | ||
1518 | case DHCP6_STATE_BOUND: | |
1519 | ||
1520 | break; | |
1521 | ||
631bbe71 | 1522 | case DHCP6_STATE_STOPPED: |
631bbe71 PF |
1523 | return 0; |
1524 | } | |
1525 | ||
712fdfd6 YW |
1526 | log_dhcp6_client(client, "Recv %s", |
1527 | dhcp6_message_type_to_string(message->type)); | |
631bbe71 | 1528 | |
a9aff361 PF |
1529 | return 0; |
1530 | } | |
1531 | ||
134ebaa4 PF |
1532 | static int client_get_lifetime(sd_dhcp6_client *client, uint32_t *lifetime_t1, |
1533 | uint32_t *lifetime_t2) { | |
1534 | assert_return(client, -EINVAL); | |
1535 | assert_return(client->lease, -EINVAL); | |
1536 | ||
1537 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_NA) && client->lease->ia.addresses) { | |
1538 | *lifetime_t1 = be32toh(client->lease->ia.ia_na.lifetime_t1); | |
1539 | *lifetime_t2 = be32toh(client->lease->ia.ia_na.lifetime_t2); | |
1540 | ||
1541 | return 0; | |
1542 | } | |
1543 | ||
1544 | if (FLAGS_SET(client->request, DHCP6_REQUEST_IA_PD) && client->lease->pd.addresses) { | |
1545 | *lifetime_t1 = be32toh(client->lease->pd.ia_pd.lifetime_t1); | |
1546 | *lifetime_t2 = be32toh(client->lease->pd.ia_pd.lifetime_t2); | |
1547 | ||
1548 | return 0; | |
1549 | } | |
1550 | ||
1551 | return -ENOMSG; | |
1552 | } | |
1553 | ||
0ae0e5cd | 1554 | static int client_start(sd_dhcp6_client *client, enum DHCP6State state) { |
f12abb48 | 1555 | int r; |
a34b57c0 PF |
1556 | usec_t timeout, time_now; |
1557 | char time_string[FORMAT_TIMESPAN_MAX]; | |
134ebaa4 | 1558 | uint32_t lifetime_t1, lifetime_t2; |
f12abb48 PF |
1559 | |
1560 | assert_return(client, -EINVAL); | |
1561 | assert_return(client->event, -EINVAL); | |
2f8e7633 | 1562 | assert_return(client->ifindex > 0, -EINVAL); |
c3e2adea | 1563 | assert_return(client->state != state, -EINVAL); |
f12abb48 | 1564 | |
c9393e8c YW |
1565 | (void) event_source_disable(client->timeout_resend_expire); |
1566 | (void) event_source_disable(client->timeout_resend); | |
c3e2adea PF |
1567 | client->retransmit_time = 0; |
1568 | client->retransmit_count = 0; | |
f12abb48 | 1569 | |
38a03f06 LP |
1570 | r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now); |
1571 | if (r < 0) | |
1572 | return r; | |
346e13a2 | 1573 | |
7ac6c26a PF |
1574 | if (!client->receive_message) { |
1575 | r = sd_event_add_io(client->event, &client->receive_message, | |
1576 | client->fd, EPOLLIN, client_receive_message, | |
1577 | client); | |
1578 | if (r < 0) | |
1579 | goto error; | |
1580 | ||
1581 | r = sd_event_source_set_priority(client->receive_message, | |
1582 | client->event_priority); | |
1583 | if (r < 0) | |
1584 | goto error; | |
1585 | ||
1586 | r = sd_event_source_set_description(client->receive_message, | |
1587 | "dhcp6-receive-message"); | |
1588 | if (r < 0) | |
1589 | goto error; | |
1590 | } | |
1591 | ||
c3e2adea PF |
1592 | switch (state) { |
1593 | case DHCP6_STATE_STOPPED: | |
bbfa43ca PF |
1594 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { |
1595 | client->state = DHCP6_STATE_STOPPED; | |
a9aff361 | 1596 | |
bbfa43ca PF |
1597 | return 0; |
1598 | } | |
9021bb9f | 1599 | |
4831981d | 1600 | _fallthrough_; |
bbfa43ca | 1601 | case DHCP6_STATE_SOLICITATION: |
c3e2adea PF |
1602 | client->state = DHCP6_STATE_SOLICITATION; |
1603 | ||
7246333c PF |
1604 | break; |
1605 | ||
bbfa43ca | 1606 | case DHCP6_STATE_INFORMATION_REQUEST: |
7246333c | 1607 | case DHCP6_STATE_REQUEST: |
3dc34fcc PF |
1608 | case DHCP6_STATE_RENEW: |
1609 | case DHCP6_STATE_REBIND: | |
a34b57c0 | 1610 | |
7246333c PF |
1611 | client->state = state; |
1612 | ||
c3e2adea | 1613 | break; |
a34b57c0 PF |
1614 | |
1615 | case DHCP6_STATE_BOUND: | |
1616 | ||
134ebaa4 PF |
1617 | r = client_get_lifetime(client, &lifetime_t1, &lifetime_t2); |
1618 | if (r < 0) | |
1619 | goto error; | |
a34b57c0 | 1620 | |
134ebaa4 | 1621 | if (lifetime_t1 == 0xffffffff || lifetime_t2 == 0xffffffff) { |
bd9a7221 | 1622 | log_dhcp6_client(client, "Infinite T1 0x%08x or T2 0x%08x", |
134ebaa4 | 1623 | lifetime_t1, lifetime_t2); |
a34b57c0 PF |
1624 | |
1625 | return 0; | |
1626 | } | |
1627 | ||
134ebaa4 | 1628 | timeout = client_timeout_compute_random(lifetime_t1 * USEC_PER_SEC); |
a34b57c0 PF |
1629 | |
1630 | log_dhcp6_client(client, "T1 expires in %s", | |
ed19c567 | 1631 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC)); |
a34b57c0 | 1632 | |
c9393e8c YW |
1633 | r = event_reset_time(client->event, &client->timeout_t1, |
1634 | clock_boottime_or_monotonic(), | |
1635 | time_now + timeout, 10 * USEC_PER_SEC, | |
1636 | client_timeout_t1, client, | |
1637 | client->event_priority, "dhcp6-t1-timeout", true); | |
9021bb9f | 1638 | if (r < 0) |
7ac6c26a | 1639 | goto error; |
9021bb9f | 1640 | |
134ebaa4 | 1641 | timeout = client_timeout_compute_random(lifetime_t2 * USEC_PER_SEC); |
a34b57c0 PF |
1642 | |
1643 | log_dhcp6_client(client, "T2 expires in %s", | |
ed19c567 | 1644 | format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC)); |
a34b57c0 | 1645 | |
c9393e8c YW |
1646 | r = event_reset_time(client->event, &client->timeout_t2, |
1647 | clock_boottime_or_monotonic(), | |
1648 | time_now + timeout, 10 * USEC_PER_SEC, | |
1649 | client_timeout_t2, client, | |
1650 | client->event_priority, "dhcp6-t2-timeout", true); | |
9021bb9f | 1651 | if (r < 0) |
7ac6c26a | 1652 | goto error; |
9021bb9f | 1653 | |
3dc34fcc PF |
1654 | client->state = state; |
1655 | ||
a34b57c0 | 1656 | return 0; |
c3e2adea | 1657 | } |
a9aff361 | 1658 | |
c3e2adea | 1659 | client->transaction_id = random_u32() & htobe32(0x00ffffff); |
346e13a2 | 1660 | client->transaction_start = time_now; |
d1b0afe3 | 1661 | |
c9393e8c YW |
1662 | r = event_reset_time(client->event, &client->timeout_resend, |
1663 | clock_boottime_or_monotonic(), | |
1664 | 0, 0, | |
1665 | client_timeout_resend, client, | |
1666 | client->event_priority, "dhcp6-resend-timeout", true); | |
9021bb9f | 1667 | if (r < 0) |
7ac6c26a | 1668 | goto error; |
9021bb9f | 1669 | |
f12abb48 | 1670 | return 0; |
7ac6c26a PF |
1671 | |
1672 | error: | |
1673 | client_reset(client); | |
1674 | return r; | |
f12abb48 PF |
1675 | } |
1676 | ||
0ae0e5cd | 1677 | int sd_dhcp6_client_stop(sd_dhcp6_client *client) { |
c8bae363 YW |
1678 | if (!client) |
1679 | return 0; | |
f667c150 | 1680 | |
10c9ce61 | 1681 | client_stop(client, SD_DHCP6_CLIENT_EVENT_STOP); |
139b011a | 1682 | |
7ac6c26a PF |
1683 | client->fd = safe_close(client->fd); |
1684 | ||
139b011a PF |
1685 | return 0; |
1686 | } | |
1687 | ||
f667c150 TG |
1688 | int sd_dhcp6_client_is_running(sd_dhcp6_client *client) { |
1689 | assert_return(client, -EINVAL); | |
1690 | ||
1691 | return client->state != DHCP6_STATE_STOPPED; | |
1692 | } | |
1693 | ||
0ae0e5cd | 1694 | int sd_dhcp6_client_start(sd_dhcp6_client *client) { |
bbfa43ca | 1695 | enum DHCP6State state = DHCP6_STATE_SOLICITATION; |
6d95e7d9 | 1696 | int r; |
139b011a PF |
1697 | |
1698 | assert_return(client, -EINVAL); | |
1699 | assert_return(client->event, -EINVAL); | |
2f8e7633 | 1700 | assert_return(client->ifindex > 0, -EINVAL); |
94876904 | 1701 | assert_return(in6_addr_is_link_local(&client->local_address) > 0, -EINVAL); |
139b011a | 1702 | |
080e5c2f | 1703 | if (client->state != DHCP6_STATE_STOPPED) |
63348d13 | 1704 | return -EBUSY; |
d7c9c21f | 1705 | |
f311a62b PF |
1706 | if (!client->information_request && !client->request) |
1707 | return -EINVAL; | |
1708 | ||
c806ffb9 | 1709 | r = client_reset(client); |
f12abb48 PF |
1710 | if (r < 0) |
1711 | return r; | |
1712 | ||
bbfa43ca PF |
1713 | r = client_ensure_iaid(client); |
1714 | if (r < 0) | |
1715 | return r; | |
1716 | ||
cc22955c TH |
1717 | r = client_ensure_duid(client); |
1718 | if (r < 0) | |
1719 | return r; | |
1720 | ||
10a0f27b PF |
1721 | if (client->fd < 0) { |
1722 | r = dhcp6_network_bind_udp_socket(client->ifindex, &client->local_address); | |
1723 | if (r < 0) { | |
1724 | _cleanup_free_ char *p = NULL; | |
1725 | ||
1726 | (void) in_addr_to_string(AF_INET6, (const union in_addr_union*) &client->local_address, &p); | |
1727 | return log_dhcp6_client_errno(client, r, | |
1728 | "Failed to bind to UDP socket at address %s: %m", strna(p)); | |
1729 | } | |
bd9a7221 | 1730 | |
10a0f27b | 1731 | client->fd = r; |
bd9a7221 | 1732 | } |
bbfa43ca | 1733 | |
fcb51238 YW |
1734 | if (client->information_request) { |
1735 | usec_t t = now(CLOCK_MONOTONIC); | |
1736 | ||
1737 | if (t < usec_add(client->information_request_time_usec, client->information_refresh_time_usec)) | |
1738 | return 0; | |
1739 | ||
1740 | client->information_request_time_usec = t; | |
bbfa43ca | 1741 | state = DHCP6_STATE_INFORMATION_REQUEST; |
fcb51238 | 1742 | } |
bbfa43ca PF |
1743 | |
1744 | log_dhcp6_client(client, "Started in %s mode", | |
787dd704 | 1745 | client->information_request ? "Information request" : "Managed"); |
bbfa43ca PF |
1746 | |
1747 | return client_start(client, state); | |
139b011a PF |
1748 | } |
1749 | ||
32d20645 | 1750 | int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event, int64_t priority) { |
139b011a PF |
1751 | int r; |
1752 | ||
1753 | assert_return(client, -EINVAL); | |
1754 | assert_return(!client->event, -EBUSY); | |
1755 | ||
1756 | if (event) | |
1757 | client->event = sd_event_ref(event); | |
1758 | else { | |
1759 | r = sd_event_default(&client->event); | |
1760 | if (r < 0) | |
1761 | return 0; | |
1762 | } | |
1763 | ||
1764 | client->event_priority = priority; | |
1765 | ||
1766 | return 0; | |
1767 | } | |
1768 | ||
1769 | int sd_dhcp6_client_detach_event(sd_dhcp6_client *client) { | |
1770 | assert_return(client, -EINVAL); | |
1771 | ||
1772 | client->event = sd_event_unref(client->event); | |
1773 | ||
1774 | return 0; | |
1775 | } | |
1776 | ||
1777 | sd_event *sd_dhcp6_client_get_event(sd_dhcp6_client *client) { | |
a1140666 | 1778 | assert_return(client, NULL); |
139b011a PF |
1779 | |
1780 | return client->event; | |
1781 | } | |
1782 | ||
8301aa0b YW |
1783 | static sd_dhcp6_client *dhcp6_client_free(sd_dhcp6_client *client) { |
1784 | assert(client); | |
139b011a | 1785 | |
c9393e8c YW |
1786 | client->timeout_resend = sd_event_source_unref(client->timeout_resend); |
1787 | client->timeout_resend_expire = sd_event_source_unref(client->timeout_resend_expire); | |
1788 | client->timeout_t1 = sd_event_source_unref(client->timeout_t1); | |
1789 | client->timeout_t2 = sd_event_source_unref(client->timeout_t2); | |
1790 | ||
3733eec3 LP |
1791 | client_reset(client); |
1792 | ||
10a0f27b PF |
1793 | client->fd = safe_close(client->fd); |
1794 | ||
3733eec3 | 1795 | sd_dhcp6_client_detach_event(client); |
3733eec3 LP |
1796 | |
1797 | free(client->req_opts); | |
8006aa32 | 1798 | free(client->fqdn); |
de8d6e55 | 1799 | free(client->mudurl); |
33923925 | 1800 | |
e7d5fe17 | 1801 | ordered_hashmap_free(client->extra_options); |
33923925 | 1802 | strv_free(client->user_class); |
73c8ced7 | 1803 | strv_free(client->vendor_class); |
61a9fa8f | 1804 | free(client->ifname); |
33923925 | 1805 | |
6b430fdb | 1806 | return mfree(client); |
139b011a PF |
1807 | } |
1808 | ||
8301aa0b YW |
1809 | DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp6_client, sd_dhcp6_client, dhcp6_client_free); |
1810 | ||
0ae0e5cd | 1811 | int sd_dhcp6_client_new(sd_dhcp6_client **ret) { |
4afd3348 | 1812 | _cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL; |
8b8ecac8 | 1813 | _cleanup_free_ be16_t *req_opts = NULL; |
da6fe470 | 1814 | size_t t; |
139b011a PF |
1815 | |
1816 | assert_return(ret, -EINVAL); | |
1817 | ||
8b8ecac8 YW |
1818 | req_opts = new(be16_t, ELEMENTSOF(default_req_opts)); |
1819 | if (!req_opts) | |
139b011a PF |
1820 | return -ENOMEM; |
1821 | ||
8b8ecac8 YW |
1822 | for (t = 0; t < ELEMENTSOF(default_req_opts); t++) |
1823 | req_opts[t] = htobe16(default_req_opts[t]); | |
c806ffb9 | 1824 | |
8b8ecac8 YW |
1825 | client = new(sd_dhcp6_client, 1); |
1826 | if (!client) | |
da6fe470 PF |
1827 | return -ENOMEM; |
1828 | ||
8b8ecac8 YW |
1829 | *client = (sd_dhcp6_client) { |
1830 | .n_ref = 1, | |
1831 | .ia_na.type = SD_DHCP6_OPTION_IA_NA, | |
1832 | .ia_pd.type = SD_DHCP6_OPTION_IA_PD, | |
1833 | .ifindex = -1, | |
1834 | .request = DHCP6_REQUEST_IA_NA, | |
1835 | .fd = -1, | |
1836 | .req_opts_len = ELEMENTSOF(default_req_opts), | |
2805536b SS |
1837 | .hint_pd_prefix.iapdprefix.lifetime_preferred = (be32_t) -1, |
1838 | .hint_pd_prefix.iapdprefix.lifetime_valid = (be32_t) -1, | |
8b8ecac8 YW |
1839 | .req_opts = TAKE_PTR(req_opts), |
1840 | }; | |
da6fe470 | 1841 | |
1cc6c93a | 1842 | *ret = TAKE_PTR(client); |
139b011a PF |
1843 | |
1844 | return 0; | |
1845 | } |