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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 | 37 | /* what to request from the server, addresses (IA_NA) and/or prefixes (IA_PD) */ |
b261b5f4 YW |
38 | typedef enum DHCP6RequestIA { |
39 | DHCP6_REQUEST_IA_NA = 1 << 0, | |
40 | DHCP6_REQUEST_IA_TA = 1 << 1, /* currently not used */ | |
41 | DHCP6_REQUEST_IA_PD = 1 << 2, | |
42 | } DHCP6RequestIA; | |
f311a62b | 43 | |
139b011a | 44 | struct sd_dhcp6_client { |
3733eec3 | 45 | unsigned n_ref; |
139b011a | 46 | |
dd5e9378 | 47 | DHCP6State state; |
139b011a PF |
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; | |
b261b5f4 | 61 | DHCP6RequestIA request_ia; |
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; |
8d71f2b3 YW |
87 | |
88 | /* Ignore ifindex when generating iaid. See dhcp_identifier_set_iaid(). */ | |
89 | bool test_mode; | |
139b011a PF |
90 | }; |
91 | ||
da6fe470 | 92 | static const uint16_t default_req_opts[] = { |
2c1ab8ca BG |
93 | SD_DHCP6_OPTION_DNS_SERVERS, |
94 | SD_DHCP6_OPTION_DOMAIN_LIST, | |
95 | SD_DHCP6_OPTION_NTP_SERVER, | |
96 | SD_DHCP6_OPTION_SNTP_SERVERS, | |
da6fe470 PF |
97 | }; |
98 | ||
59f1ded8 YW |
99 | const char * dhcp6_message_type_table[_DHCP6_MESSAGE_TYPE_MAX] = { |
100 | [DHCP6_MESSAGE_SOLICIT] = "Solicit", | |
101 | [DHCP6_MESSAGE_ADVERTISE] = "Advertise", | |
102 | [DHCP6_MESSAGE_REQUEST] = "Request", | |
103 | [DHCP6_MESSAGE_CONFIRM] = "Confirm", | |
104 | [DHCP6_MESSAGE_RENEW] = "Renew", | |
105 | [DHCP6_MESSAGE_REBIND] = "Rebind", | |
106 | [DHCP6_MESSAGE_REPLY] = "Reply", | |
107 | [DHCP6_MESSAGE_RELEASE] = "Release", | |
108 | [DHCP6_MESSAGE_DECLINE] = "Decline", | |
109 | [DHCP6_MESSAGE_RECONFIGURE] = "Reconfigure", | |
110 | [DHCP6_MESSAGE_INFORMATION_REQUEST] = "Information Request", | |
111 | [DHCP6_MESSAGE_RELAY_FORWARD] = "Relay Forward", | |
112 | [DHCP6_MESSAGE_RELAY_REPLY] = "Relay Reply", | |
113 | [DHCP6_MESSAGE_LEASE_QUERY] = "Lease Query", | |
114 | [DHCP6_MESSAGE_LEASE_QUERY_REPLY] = "Lease Query Reply", | |
115 | [DHCP6_MESSAGE_LEASE_QUERY_DONE] = "Lease Query Done", | |
116 | [DHCP6_MESSAGE_LEASE_QUERY_DATA] = "Lease Query Data", | |
117 | [DHCP6_MESSAGE_RECONFIGURE_REQUEST] = "Reconfigure Request", | |
118 | [DHCP6_MESSAGE_RECONFIGURE_REPLY] = "Reconfigure Reply", | |
119 | [DHCP6_MESSAGE_DHCPV4_QUERY] = "DHCPv4 Query", | |
120 | [DHCP6_MESSAGE_DHCPV4_RESPONSE] = "DHCPv4 Response", | |
121 | [DHCP6_MESSAGE_ACTIVE_LEASE_QUERY] = "Active Lease Query", | |
122 | [DHCP6_MESSAGE_START_TLS] = "Start TLS", | |
123 | [DHCP6_MESSAGE_BINDING_UPDATE] = "Binding Update", | |
124 | [DHCP6_MESSAGE_BINDING_REPLY] = "Binding Reply", | |
125 | [DHCP6_MESSAGE_POOL_REQUEST] = "Pool Request", | |
126 | [DHCP6_MESSAGE_POOL_RESPONSE] = "Pool Response", | |
127 | [DHCP6_MESSAGE_UPDATE_REQUEST] = "Update Request", | |
128 | [DHCP6_MESSAGE_UPDATE_REQUEST_ALL] = "Update Request All", | |
129 | [DHCP6_MESSAGE_UPDATE_DONE] = "Update Done", | |
130 | [DHCP6_MESSAGE_CONNECT] = "Connect", | |
131 | [DHCP6_MESSAGE_CONNECT_REPLY] = "Connect Reply", | |
132 | [DHCP6_MESSAGE_DISCONNECT] = "Disconnect", | |
133 | [DHCP6_MESSAGE_STATE] = "State", | |
134 | [DHCP6_MESSAGE_CONTACT] = "Contact", | |
a9aff361 PF |
135 | }; |
136 | ||
137 | DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_type, int); | |
138 | ||
631bbe71 | 139 | const char * dhcp6_message_status_table[_DHCP6_STATUS_MAX] = { |
76643fed SS |
140 | [DHCP6_STATUS_SUCCESS] = "Success", |
141 | [DHCP6_STATUS_UNSPEC_FAIL] = "Unspecified failure", | |
142 | [DHCP6_STATUS_NO_ADDRS_AVAIL] = "No addresses available", | |
143 | [DHCP6_STATUS_NO_BINDING] = "Binding unavailable", | |
144 | [DHCP6_STATUS_NOT_ON_LINK] = "Not on link", | |
145 | [DHCP6_STATUS_USE_MULTICAST] = "Use multicast", | |
146 | [DHCP6_STATUS_NO_PREFIX_AVAIL] = "No prefix available", | |
147 | [DHCP6_STATUS_UNKNOWN_QUERY_TYPE] = "Unknown query type", | |
148 | [DHCP6_STATUS_MALFORMED_QUERY] = "Malformed query", | |
149 | [DHCP6_STATUS_NOT_CONFIGURED] = "Not configured", | |
150 | [DHCP6_STATUS_NOT_ALLOWED] = "Not allowed", | |
151 | [DHCP6_STATUS_QUERY_TERMINATED] = "Query terminated", | |
152 | [DHCP6_STATUS_DATA_MISSING] = "Data missing", | |
153 | [DHCP6_STATUS_CATCHUP_COMPLETE] = "Catch up complete", | |
154 | [DHCP6_STATUS_NOT_SUPPORTED] = "Not supported", | |
155 | [DHCP6_STATUS_TLS_CONNECTION_REFUSED] = "TLS connection refused", | |
156 | [DHCP6_STATUS_ADDRESS_IN_USE] = "Address in use", | |
157 | [DHCP6_STATUS_CONFIGURATION_CONFLICT] = "Configuration conflict", | |
158 | [DHCP6_STATUS_MISSING_BINDING_INFORMATION] = "Missing binding information", | |
159 | [DHCP6_STATUS_OUTDATED_BINDING_INFORMATION] = "Outdated binding information", | |
160 | [DHCP6_STATUS_SERVER_SHUTTING_DOWN] = "Server shutting down", | |
161 | [DHCP6_STATUS_DNS_UPDATE_NOT_SUPPORTED] = "DNS update not supported", | |
162 | [DHCP6_STATUS_EXCESSIVE_TIME_SKEW] = "Excessive time skew", | |
631bbe71 PF |
163 | }; |
164 | ||
165 | DEFINE_STRING_TABLE_LOOKUP(dhcp6_message_status, int); | |
166 | ||
3f0c075f | 167 | #define DHCP6_CLIENT_DONT_DESTROY(client) \ |
4afd3348 | 168 | _cleanup_(sd_dhcp6_client_unrefp) _unused_ sd_dhcp6_client *_dont_destroy_##client = sd_dhcp6_client_ref(client) |
3f0c075f | 169 | |
dd5e9378 | 170 | static int client_start(sd_dhcp6_client *client, DHCP6State state); |
c3e2adea | 171 | |
4b558378 ZJS |
172 | int sd_dhcp6_client_set_callback( |
173 | sd_dhcp6_client *client, | |
174 | sd_dhcp6_client_callback_t cb, | |
175 | void *userdata) { | |
45aa74c7 | 176 | |
139b011a PF |
177 | assert_return(client, -EINVAL); |
178 | ||
45aa74c7 | 179 | client->callback = cb; |
139b011a PF |
180 | client->userdata = userdata; |
181 | ||
182 | return 0; | |
183 | } | |
184 | ||
2f8e7633 | 185 | int sd_dhcp6_client_set_ifindex(sd_dhcp6_client *client, int ifindex) { |
2f8e7633 | 186 | assert_return(client, -EINVAL); |
7fa69c0a | 187 | assert_return(ifindex > 0, -EINVAL); |
080e5c2f | 188 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); |
d7c9c21f | 189 | |
2f8e7633 | 190 | client->ifindex = ifindex; |
139b011a PF |
191 | return 0; |
192 | } | |
193 | ||
61a9fa8f YW |
194 | int sd_dhcp6_client_set_ifname(sd_dhcp6_client *client, const char *ifname) { |
195 | assert_return(client, -EINVAL); | |
196 | assert_return(ifname, -EINVAL); | |
197 | ||
198 | if (!ifname_valid_full(ifname, IFNAME_VALID_ALTERNATIVE)) | |
199 | return -EINVAL; | |
200 | ||
201 | return free_and_strdup(&client->ifname, ifname); | |
202 | } | |
203 | ||
5977b71f YW |
204 | int sd_dhcp6_client_get_ifname(sd_dhcp6_client *client, const char **ret) { |
205 | int r; | |
61a9fa8f | 206 | |
5977b71f YW |
207 | assert_return(client, -EINVAL); |
208 | ||
209 | r = get_ifname(client->ifindex, &client->ifname); | |
210 | if (r < 0) | |
211 | return r; | |
212 | ||
213 | if (ret) | |
214 | *ret = client->ifname; | |
215 | ||
216 | return 0; | |
61a9fa8f YW |
217 | } |
218 | ||
4b558378 ZJS |
219 | int sd_dhcp6_client_set_local_address( |
220 | sd_dhcp6_client *client, | |
221 | const struct in6_addr *local_address) { | |
222 | ||
c601ebf7 TG |
223 | assert_return(client, -EINVAL); |
224 | assert_return(local_address, -EINVAL); | |
94876904 | 225 | assert_return(in6_addr_is_link_local(local_address) > 0, -EINVAL); |
080e5c2f | 226 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); |
c601ebf7 TG |
227 | |
228 | client->local_address = *local_address; | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
0ae0e5cd LP |
233 | int sd_dhcp6_client_set_mac( |
234 | sd_dhcp6_client *client, | |
235 | const uint8_t *addr, size_t addr_len, | |
236 | uint16_t arp_type) { | |
237 | ||
139b011a | 238 | assert_return(client, -EINVAL); |
76253e73 | 239 | assert_return(addr, -EINVAL); |
1d370b2c | 240 | assert_return(addr_len <= MAX_MAC_ADDR_LEN, -EINVAL); |
080e5c2f | 241 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); |
d7c9c21f | 242 | |
76253e73 DW |
243 | if (arp_type == ARPHRD_ETHER) |
244 | assert_return(addr_len == ETH_ALEN, -EINVAL); | |
245 | else if (arp_type == ARPHRD_INFINIBAND) | |
246 | assert_return(addr_len == INFINIBAND_ALEN, -EINVAL); | |
1d370b2c JT |
247 | else { |
248 | client->arp_type = ARPHRD_NONE; | |
249 | client->mac_addr_len = 0; | |
250 | return 0; | |
251 | } | |
76253e73 DW |
252 | |
253 | if (client->mac_addr_len == addr_len && | |
254 | memcmp(&client->mac_addr, addr, addr_len) == 0) | |
255 | return 0; | |
256 | ||
257 | memcpy(&client->mac_addr, addr, addr_len); | |
258 | client->mac_addr_len = addr_len; | |
259 | client->arp_type = arp_type; | |
139b011a PF |
260 | |
261 | return 0; | |
262 | } | |
263 | ||
2805536b SS |
264 | int sd_dhcp6_client_set_prefix_delegation_hint( |
265 | sd_dhcp6_client *client, | |
266 | uint8_t prefixlen, | |
267 | const struct in6_addr *pd_address) { | |
268 | ||
269 | assert_return(client, -EINVAL); | |
270 | assert_return(pd_address, -EINVAL); | |
080e5c2f | 271 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); |
2805536b SS |
272 | |
273 | client->hint_pd_prefix.iapdprefix.address = *pd_address; | |
274 | client->hint_pd_prefix.iapdprefix.prefixlen = prefixlen; | |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
99ccb8ff SS |
279 | int sd_dhcp6_client_add_vendor_option(sd_dhcp6_client *client, sd_dhcp6_option *v) { |
280 | int r; | |
281 | ||
282 | assert_return(client, -EINVAL); | |
283 | assert_return(v, -EINVAL); | |
284 | ||
02288f3e | 285 | r = ordered_hashmap_ensure_put(&client->vendor_options, &dhcp6_option_hash_ops, v, v); |
99ccb8ff SS |
286 | if (r < 0) |
287 | return r; | |
288 | ||
289 | sd_dhcp6_option_ref(v); | |
290 | ||
291 | return 1; | |
292 | } | |
293 | ||
0ae0e5cd | 294 | static int client_ensure_duid(sd_dhcp6_client *client) { |
cc22955c TH |
295 | if (client->duid_len != 0) |
296 | return 0; | |
0ae0e5cd | 297 | |
cc22955c TH |
298 | return dhcp_identifier_set_duid_en(&client->duid, &client->duid_len); |
299 | } | |
300 | ||
d7df2fd3 ZJS |
301 | /** |
302 | * Sets DUID. If duid is non-null, the DUID is set to duid_type + duid | |
303 | * without further modification. Otherwise, if duid_type is supported, DUID | |
304 | * is set based on that type. Otherwise, an error is returned. | |
305 | */ | |
7e90a499 | 306 | static int dhcp6_client_set_duid_internal( |
4b558378 ZJS |
307 | sd_dhcp6_client *client, |
308 | uint16_t duid_type, | |
f7a92d1a | 309 | const void *duid, |
7e90a499 YW |
310 | size_t duid_len, |
311 | usec_t llt_time) { | |
413708d1 | 312 | int r; |
27eba50e | 313 | |
66eac120 | 314 | assert_return(client, -EINVAL); |
d7df2fd3 | 315 | assert_return(duid_len == 0 || duid != NULL, -EINVAL); |
080e5c2f | 316 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); |
c83321e6 | 317 | |
1d6cc5d0 | 318 | if (duid) { |
ab4a88bc TH |
319 | r = dhcp_validate_duid_len(duid_type, duid_len, true); |
320 | if (r < 0) { | |
321 | r = dhcp_validate_duid_len(duid_type, duid_len, false); | |
322 | if (r < 0) | |
a339859f | 323 | return log_dhcp6_client_errno(client, r, "Failed to validate length of DUID: %m"); |
01bcea49 LP |
324 | |
325 | log_dhcp6_client(client, "Using DUID of type %u of incorrect length, proceeding.", duid_type); | |
ab4a88bc | 326 | } |
d7df2fd3 | 327 | |
413708d1 VK |
328 | client->duid.type = htobe16(duid_type); |
329 | memcpy(&client->duid.raw.data, duid, duid_len); | |
d7df2fd3 | 330 | client->duid_len = sizeof(client->duid.type) + duid_len; |
d7df2fd3 | 331 | } else |
27eba50e | 332 | switch (duid_type) { |
335f80a6 | 333 | case DUID_TYPE_LLT: |
339697f0 | 334 | if (client->mac_addr_len == 0) |
a339859f | 335 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EOPNOTSUPP), "Failed to set DUID-LLT, MAC address is not set."); |
335f80a6 | 336 | |
53253d9c | 337 | r = dhcp_identifier_set_duid_llt(&client->duid, llt_time, client->mac_addr, client->mac_addr_len, client->arp_type, &client->duid_len); |
335f80a6 | 338 | if (r < 0) |
a339859f | 339 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-LLT: %m"); |
335f80a6 | 340 | break; |
27eba50e YW |
341 | case DUID_TYPE_EN: |
342 | r = dhcp_identifier_set_duid_en(&client->duid, &client->duid_len); | |
343 | if (r < 0) | |
a339859f | 344 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-EN: %m"); |
27eba50e | 345 | break; |
335f80a6 | 346 | case DUID_TYPE_LL: |
339697f0 | 347 | if (client->mac_addr_len == 0) |
a339859f | 348 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EOPNOTSUPP), "Failed to set DUID-LL, MAC address is not set."); |
335f80a6 YW |
349 | |
350 | r = dhcp_identifier_set_duid_ll(&client->duid, client->mac_addr, client->mac_addr_len, client->arp_type, &client->duid_len); | |
351 | if (r < 0) | |
a339859f | 352 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-LL: %m"); |
335f80a6 | 353 | break; |
27eba50e YW |
354 | case DUID_TYPE_UUID: |
355 | r = dhcp_identifier_set_duid_uuid(&client->duid, &client->duid_len); | |
356 | if (r < 0) | |
a339859f | 357 | return log_dhcp6_client_errno(client, r, "Failed to set DUID-UUID: %m"); |
27eba50e YW |
358 | break; |
359 | default: | |
a339859f | 360 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EINVAL), "Invalid DUID type"); |
27eba50e | 361 | } |
fe4b2156 | 362 | |
413708d1 VK |
363 | return 0; |
364 | } | |
365 | ||
7e90a499 YW |
366 | int sd_dhcp6_client_set_duid( |
367 | sd_dhcp6_client *client, | |
368 | uint16_t duid_type, | |
369 | const void *duid, | |
370 | size_t duid_len) { | |
371 | return dhcp6_client_set_duid_internal(client, duid_type, duid, duid_len, 0); | |
372 | } | |
373 | ||
374 | int sd_dhcp6_client_set_duid_llt( | |
375 | sd_dhcp6_client *client, | |
376 | usec_t llt_time) { | |
377 | return dhcp6_client_set_duid_internal(client, DUID_TYPE_LLT, NULL, 0, llt_time); | |
378 | } | |
379 | ||
6b7d5b6e SS |
380 | static const char* const dhcp6_duid_type_table[_DUID_TYPE_MAX] = { |
381 | [DUID_TYPE_LLT] = "DUID-LLT", | |
382 | [DUID_TYPE_EN] = "DUID-EN/Vendor", | |
383 | [DUID_TYPE_LL] = "DUID-LL", | |
384 | [DUID_TYPE_UUID] = "UUID", | |
385 | }; | |
386 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(dhcp6_duid_type, DUIDType); | |
387 | ||
388 | int sd_dhcp6_client_duid_as_string( | |
389 | sd_dhcp6_client *client, | |
390 | char **duid) { | |
391 | _cleanup_free_ char *p = NULL, *s = NULL, *t = NULL; | |
392 | const char *v; | |
393 | int r; | |
394 | ||
395 | assert_return(client, -EINVAL); | |
396 | assert_return(client->duid_len > 0, -ENODATA); | |
361eb412 | 397 | assert_return(duid, -EINVAL); |
6b7d5b6e SS |
398 | |
399 | v = dhcp6_duid_type_to_string(be16toh(client->duid.type)); | |
400 | if (v) { | |
401 | s = strdup(v); | |
402 | if (!s) | |
403 | return -ENOMEM; | |
404 | } else { | |
405 | r = asprintf(&s, "%0x", client->duid.type); | |
406 | if (r < 0) | |
407 | return -ENOMEM; | |
408 | } | |
409 | ||
410 | t = hexmem(&client->duid.raw.data, client->duid_len); | |
411 | if (!t) | |
412 | return -ENOMEM; | |
413 | ||
414 | p = strjoin(s, ":", t); | |
415 | if (!p) | |
416 | return -ENOMEM; | |
417 | ||
418 | *duid = TAKE_PTR(p); | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
413708d1 VK |
423 | int sd_dhcp6_client_set_iaid(sd_dhcp6_client *client, uint32_t iaid) { |
424 | assert_return(client, -EINVAL); | |
080e5c2f | 425 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); |
413708d1 | 426 | |
e0026dcb | 427 | client->ia_na.ia_na.id = htobe32(iaid); |
dce6563f | 428 | client->ia_pd.ia_pd.id = htobe32(iaid); |
8217ed5e | 429 | client->iaid_set = true; |
66eac120 DW |
430 | |
431 | return 0; | |
432 | } | |
433 | ||
8d71f2b3 YW |
434 | void dhcp6_client_set_test_mode(sd_dhcp6_client *client, bool test_mode) { |
435 | assert(client); | |
436 | ||
437 | client->test_mode = test_mode; | |
438 | } | |
439 | ||
d69d4038 SS |
440 | int sd_dhcp6_client_get_iaid(sd_dhcp6_client *client, uint32_t *iaid) { |
441 | assert_return(client, -EINVAL); | |
442 | assert_return(iaid, -EINVAL); | |
443 | ||
444 | if (!client->iaid_set) | |
445 | return -ENODATA; | |
446 | ||
447 | *iaid = be32toh(client->ia_na.ia_na.id); | |
448 | ||
449 | return 0; | |
450 | } | |
451 | ||
8006aa32 SA |
452 | int sd_dhcp6_client_set_fqdn( |
453 | sd_dhcp6_client *client, | |
454 | const char *fqdn) { | |
455 | ||
456 | assert_return(client, -EINVAL); | |
457 | ||
458 | /* Make sure FQDN qualifies as DNS and as Linux hostname */ | |
459 | if (fqdn && | |
52ef5dd7 | 460 | !(hostname_is_valid(fqdn, 0) && dns_name_is_valid(fqdn) > 0)) |
8006aa32 SA |
461 | return -EINVAL; |
462 | ||
463 | return free_and_strdup(&client->fqdn, fqdn); | |
464 | } | |
465 | ||
04c01369 | 466 | int sd_dhcp6_client_set_information_request(sd_dhcp6_client *client, int enabled) { |
bbfa43ca | 467 | assert_return(client, -EINVAL); |
080e5c2f | 468 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); |
d7c9c21f | 469 | |
bbfa43ca PF |
470 | client->information_request = enabled; |
471 | ||
472 | return 0; | |
473 | } | |
474 | ||
04c01369 | 475 | int sd_dhcp6_client_get_information_request(sd_dhcp6_client *client, int *enabled) { |
bbfa43ca PF |
476 | assert_return(client, -EINVAL); |
477 | assert_return(enabled, -EINVAL); | |
478 | ||
479 | *enabled = client->information_request; | |
480 | ||
481 | return 0; | |
482 | } | |
483 | ||
0ae0e5cd | 484 | int sd_dhcp6_client_set_request_option(sd_dhcp6_client *client, uint16_t option) { |
da6fe470 PF |
485 | size_t t; |
486 | ||
487 | assert_return(client, -EINVAL); | |
488 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
489 | ||
2d3adfa6 | 490 | if (option <= 0 || option >= UINT8_MAX) |
da6fe470 | 491 | return -EINVAL; |
da6fe470 PF |
492 | |
493 | for (t = 0; t < client->req_opts_len; t++) | |
494 | if (client->req_opts[t] == htobe16(option)) | |
495 | return -EEXIST; | |
496 | ||
319a4f4b | 497 | if (!GREEDY_REALLOC(client->req_opts, client->req_opts_len + 1)) |
da6fe470 PF |
498 | return -ENOMEM; |
499 | ||
500 | client->req_opts[client->req_opts_len++] = htobe16(option); | |
501 | ||
502 | return 0; | |
503 | } | |
504 | ||
feb7d7a2 | 505 | int sd_dhcp6_client_set_request_mud_url(sd_dhcp6_client *client, const char *mudurl) { |
de8d6e55 SS |
506 | assert_return(client, -EINVAL); |
507 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
508 | assert_return(mudurl, -EINVAL); | |
2d3adfa6 | 509 | assert_return(strlen(mudurl) <= UINT8_MAX, -EINVAL); |
de8d6e55 SS |
510 | assert_return(http_url_is_valid(mudurl), -EINVAL); |
511 | ||
512 | return free_and_strdup(&client->mudurl, mudurl); | |
513 | } | |
514 | ||
5a99444e YW |
515 | int sd_dhcp6_client_set_request_user_class(sd_dhcp6_client *client, char * const *user_class) { |
516 | char * const *p; | |
517 | char **s; | |
33923925 SS |
518 | |
519 | assert_return(client, -EINVAL); | |
520 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
5a99444e | 521 | assert_return(!strv_isempty(user_class), -EINVAL); |
73c8ced7 | 522 | |
5a99444e YW |
523 | STRV_FOREACH(p, user_class) { |
524 | size_t len = strlen(*p); | |
33923925 | 525 | |
5a99444e YW |
526 | if (len > UINT16_MAX || len == 0) |
527 | return -EINVAL; | |
528 | } | |
33923925 | 529 | |
2d3adfa6 | 530 | s = strv_copy(user_class); |
33923925 SS |
531 | if (!s) |
532 | return -ENOMEM; | |
533 | ||
5a99444e | 534 | return strv_free_and_replace(client->user_class, s); |
33923925 SS |
535 | } |
536 | ||
019951ec YW |
537 | int sd_dhcp6_client_set_request_vendor_class(sd_dhcp6_client *client, char * const *vendor_class) { |
538 | char * const *p; | |
539 | char **s; | |
73c8ced7 SS |
540 | |
541 | assert_return(client, -EINVAL); | |
542 | assert_return(client->state == DHCP6_STATE_STOPPED, -EBUSY); | |
019951ec | 543 | assert_return(!strv_isempty(vendor_class), -EINVAL); |
73c8ced7 | 544 | |
019951ec YW |
545 | STRV_FOREACH(p, vendor_class) { |
546 | size_t len = strlen(*p); | |
547 | ||
548 | if (len > UINT16_MAX || len == 0) | |
549 | return -EINVAL; | |
550 | } | |
73c8ced7 SS |
551 | |
552 | s = strv_copy(vendor_class); | |
553 | if (!s) | |
554 | return -ENOMEM; | |
555 | ||
019951ec | 556 | return strv_free_and_replace(client->vendor_class, s); |
73c8ced7 SS |
557 | } |
558 | ||
d8c51121 PF |
559 | int sd_dhcp6_client_get_prefix_delegation(sd_dhcp6_client *client, int *delegation) { |
560 | assert_return(client, -EINVAL); | |
561 | assert_return(delegation, -EINVAL); | |
562 | ||
b261b5f4 | 563 | *delegation = FLAGS_SET(client->request_ia, DHCP6_REQUEST_IA_PD); |
d8c51121 PF |
564 | |
565 | return 0; | |
566 | } | |
567 | ||
568 | int sd_dhcp6_client_set_prefix_delegation(sd_dhcp6_client *client, int delegation) { | |
7c3de8f8 PF |
569 | assert_return(client, -EINVAL); |
570 | ||
b261b5f4 | 571 | SET_FLAG(client->request_ia, DHCP6_REQUEST_IA_PD, delegation); |
f311a62b PF |
572 | |
573 | return 0; | |
574 | } | |
575 | ||
576 | int sd_dhcp6_client_get_address_request(sd_dhcp6_client *client, int *request) { | |
577 | assert_return(client, -EINVAL); | |
578 | assert_return(request, -EINVAL); | |
579 | ||
b261b5f4 | 580 | *request = FLAGS_SET(client->request_ia, DHCP6_REQUEST_IA_NA); |
f311a62b PF |
581 | |
582 | return 0; | |
583 | } | |
584 | ||
585 | int sd_dhcp6_client_set_address_request(sd_dhcp6_client *client, int request) { | |
586 | assert_return(client, -EINVAL); | |
587 | ||
b261b5f4 | 588 | SET_FLAG(client->request_ia, DHCP6_REQUEST_IA_NA, request); |
7c3de8f8 PF |
589 | |
590 | return 0; | |
591 | } | |
592 | ||
b62f9008 | 593 | int sd_dhcp6_client_set_transaction_id(sd_dhcp6_client *client, uint32_t transaction_id) { |
d89a400e EV |
594 | assert_return(client, -EINVAL); |
595 | ||
596 | client->transaction_id = transaction_id; | |
597 | ||
598 | return 0; | |
599 | } | |
600 | ||
ea3b3a75 PF |
601 | int sd_dhcp6_client_get_lease(sd_dhcp6_client *client, sd_dhcp6_lease **ret) { |
602 | assert_return(client, -EINVAL); | |
ea3b3a75 PF |
603 | |
604 | if (!client->lease) | |
605 | return -ENOMSG; | |
606 | ||
3098562c TG |
607 | if (ret) |
608 | *ret = client->lease; | |
ea3b3a75 PF |
609 | |
610 | return 0; | |
611 | } | |
612 | ||
e7d5fe17 AD |
613 | int sd_dhcp6_client_add_option(sd_dhcp6_client *client, sd_dhcp6_option *v) { |
614 | int r; | |
615 | ||
616 | assert_return(client, -EINVAL); | |
617 | assert_return(v, -EINVAL); | |
618 | ||
02288f3e | 619 | r = ordered_hashmap_ensure_put(&client->extra_options, &dhcp6_option_hash_ops, UINT_TO_PTR(v->option), v); |
e7d5fe17 AD |
620 | if (r < 0) |
621 | return r; | |
622 | ||
623 | sd_dhcp6_option_ref(v); | |
624 | return 0; | |
625 | } | |
626 | ||
3f0c075f | 627 | static void client_notify(sd_dhcp6_client *client, int event) { |
45aa74c7 LP |
628 | assert(client); |
629 | ||
630 | if (client->callback) | |
631 | client->callback(client, event, client->userdata); | |
139b011a PF |
632 | } |
633 | ||
f8908727 | 634 | static int client_reset(sd_dhcp6_client *client) { |
a1140666 | 635 | assert(client); |
f8908727 | 636 | |
431a4bc8 | 637 | client->lease = sd_dhcp6_lease_unref(client->lease); |
4e3e6679 | 638 | |
a9aff361 PF |
639 | client->receive_message = |
640 | sd_event_source_unref(client->receive_message); | |
641 | ||
c3e2adea | 642 | client->transaction_id = 0; |
346e13a2 | 643 | client->transaction_start = 0; |
a9aff361 | 644 | |
d1b0afe3 PF |
645 | client->retransmit_time = 0; |
646 | client->retransmit_count = 0; | |
d1b0afe3 | 647 | |
c9393e8c YW |
648 | (void) event_source_disable(client->timeout_resend); |
649 | (void) event_source_disable(client->timeout_resend_expire); | |
650 | (void) event_source_disable(client->timeout_t1); | |
651 | (void) event_source_disable(client->timeout_t2); | |
213e759a | 652 | |
139b011a PF |
653 | client->state = DHCP6_STATE_STOPPED; |
654 | ||
655 | return 0; | |
656 | } | |
657 | ||
3f0c075f PF |
658 | static void client_stop(sd_dhcp6_client *client, int error) { |
659 | DHCP6_CLIENT_DONT_DESTROY(client); | |
139b011a | 660 | |
3f0c075f | 661 | assert(client); |
139b011a | 662 | |
3f0c075f PF |
663 | client_notify(client, error); |
664 | ||
665 | client_reset(client); | |
139b011a PF |
666 | } |
667 | ||
346e13a2 | 668 | static int client_send_message(sd_dhcp6_client *client, usec_t time_now) { |
a9aff361 PF |
669 | _cleanup_free_ DHCP6Message *message = NULL; |
670 | struct in6_addr all_servers = | |
671 | IN6ADDR_ALL_DHCP6_RELAY_AGENTS_AND_SERVERS_INIT; | |
e7d5fe17 | 672 | struct sd_dhcp6_option *j; |
a9aff361 PF |
673 | size_t len, optlen = 512; |
674 | uint8_t *opt; | |
675 | int r; | |
346e13a2 PF |
676 | usec_t elapsed_usec; |
677 | be16_t elapsed_time; | |
a9aff361 | 678 | |
a1140666 LP |
679 | assert(client); |
680 | ||
a9aff361 PF |
681 | len = sizeof(DHCP6Message) + optlen; |
682 | ||
683 | message = malloc0(len); | |
684 | if (!message) | |
685 | return -ENOMEM; | |
686 | ||
687 | opt = (uint8_t *)(message + 1); | |
688 | ||
689 | message->transaction_id = client->transaction_id; | |
690 | ||
691 | switch(client->state) { | |
bbfa43ca | 692 | case DHCP6_STATE_INFORMATION_REQUEST: |
59f1ded8 | 693 | message->type = DHCP6_MESSAGE_INFORMATION_REQUEST; |
bbfa43ca | 694 | |
de8d6e55 SS |
695 | if (client->mudurl) { |
696 | r = dhcp6_option_append(&opt, &optlen, | |
f5e3619b | 697 | SD_DHCP6_OPTION_MUD_URL_V6, strlen(client->mudurl), |
de8d6e55 SS |
698 | client->mudurl); |
699 | if (r < 0) | |
700 | return r; | |
701 | } | |
702 | ||
bbfa43ca PF |
703 | break; |
704 | ||
a9aff361 | 705 | case DHCP6_STATE_SOLICITATION: |
59f1ded8 | 706 | message->type = DHCP6_MESSAGE_SOLICIT; |
a9aff361 | 707 | |
ed6ee219 | 708 | r = dhcp6_option_append(&opt, &optlen, |
2c1ab8ca | 709 | SD_DHCP6_OPTION_RAPID_COMMIT, 0, NULL); |
926695f1 TA |
710 | if (r < 0) |
711 | return r; | |
ed6ee219 | 712 | |
b261b5f4 | 713 | if (FLAGS_SET(client->request_ia, DHCP6_REQUEST_IA_NA)) { |
f311a62b PF |
714 | r = dhcp6_option_append_ia(&opt, &optlen, |
715 | &client->ia_na); | |
716 | if (r < 0) | |
717 | return r; | |
718 | } | |
a9aff361 | 719 | |
8006aa32 SA |
720 | if (client->fqdn) { |
721 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
722 | if (r < 0) | |
723 | return r; | |
724 | } | |
725 | ||
de8d6e55 SS |
726 | if (client->mudurl) { |
727 | r = dhcp6_option_append(&opt, &optlen, | |
f5e3619b | 728 | SD_DHCP6_OPTION_MUD_URL_V6, strlen(client->mudurl), |
de8d6e55 SS |
729 | client->mudurl); |
730 | if (r < 0) | |
731 | return r; | |
732 | } | |
733 | ||
33923925 SS |
734 | if (client->user_class) { |
735 | r = dhcp6_option_append_user_class(&opt, &optlen, client->user_class); | |
736 | if (r < 0) | |
737 | return r; | |
738 | } | |
739 | ||
73c8ced7 SS |
740 | if (client->vendor_class) { |
741 | r = dhcp6_option_append_vendor_class(&opt, &optlen, client->vendor_class); | |
742 | if (r < 0) | |
743 | return r; | |
744 | } | |
745 | ||
99ccb8ff SS |
746 | if (!ordered_hashmap_isempty(client->vendor_options)) { |
747 | r = dhcp6_option_append_vendor_option(&opt, &optlen, | |
748 | client->vendor_options); | |
749 | if (r < 0) | |
750 | return r; | |
751 | } | |
752 | ||
b261b5f4 | 753 | if (FLAGS_SET(client->request_ia, DHCP6_REQUEST_IA_PD)) { |
73b49d43 | 754 | r = dhcp6_option_append_pd(&opt, &optlen, &client->ia_pd, &client->hint_pd_prefix); |
7c3de8f8 PF |
755 | if (r < 0) |
756 | return r; | |
7c3de8f8 PF |
757 | } |
758 | ||
7246333c PF |
759 | break; |
760 | ||
761 | case DHCP6_STATE_REQUEST: | |
3dc34fcc PF |
762 | case DHCP6_STATE_RENEW: |
763 | ||
764 | if (client->state == DHCP6_STATE_REQUEST) | |
59f1ded8 | 765 | message->type = DHCP6_MESSAGE_REQUEST; |
3dc34fcc | 766 | else |
59f1ded8 | 767 | message->type = DHCP6_MESSAGE_RENEW; |
7246333c | 768 | |
2c1ab8ca | 769 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_SERVERID, |
7246333c PF |
770 | client->lease->serverid_len, |
771 | client->lease->serverid); | |
772 | if (r < 0) | |
773 | return r; | |
774 | ||
b261b5f4 | 775 | if (FLAGS_SET(client->request_ia, DHCP6_REQUEST_IA_NA) && client->lease->ia.addresses) { |
f311a62b PF |
776 | r = dhcp6_option_append_ia(&opt, &optlen, |
777 | &client->lease->ia); | |
778 | if (r < 0) | |
779 | return r; | |
780 | } | |
a9aff361 | 781 | |
8006aa32 SA |
782 | if (client->fqdn) { |
783 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
784 | if (r < 0) | |
785 | return r; | |
786 | } | |
787 | ||
de8d6e55 SS |
788 | if (client->mudurl) { |
789 | r = dhcp6_option_append(&opt, &optlen, | |
f5e3619b | 790 | SD_DHCP6_OPTION_MUD_URL_V6, strlen(client->mudurl), |
de8d6e55 SS |
791 | client->mudurl); |
792 | if (r < 0) | |
793 | return r; | |
794 | } | |
795 | ||
33923925 SS |
796 | if (client->user_class) { |
797 | r = dhcp6_option_append_user_class(&opt, &optlen, client->user_class); | |
798 | if (r < 0) | |
799 | return r; | |
800 | } | |
801 | ||
73c8ced7 SS |
802 | if (client->vendor_class) { |
803 | r = dhcp6_option_append_vendor_class(&opt, &optlen, client->vendor_class); | |
804 | if (r < 0) | |
805 | return r; | |
806 | } | |
807 | ||
99ccb8ff SS |
808 | if (!ordered_hashmap_isempty(client->vendor_options)) { |
809 | r = dhcp6_option_append_vendor_option(&opt, &optlen, client->vendor_options); | |
810 | if (r < 0) | |
811 | return r; | |
812 | } | |
813 | ||
b261b5f4 | 814 | if (FLAGS_SET(client->request_ia, DHCP6_REQUEST_IA_PD) && client->lease->pd.addresses) { |
73b49d43 | 815 | r = dhcp6_option_append_pd(&opt, &optlen, &client->lease->pd, NULL); |
7c3de8f8 PF |
816 | if (r < 0) |
817 | return r; | |
7c3de8f8 PF |
818 | } |
819 | ||
a9aff361 PF |
820 | break; |
821 | ||
3dc34fcc | 822 | case DHCP6_STATE_REBIND: |
59f1ded8 | 823 | message->type = DHCP6_MESSAGE_REBIND; |
3dc34fcc | 824 | |
b261b5f4 | 825 | if (FLAGS_SET(client->request_ia, DHCP6_REQUEST_IA_NA)) { |
f311a62b PF |
826 | r = dhcp6_option_append_ia(&opt, &optlen, &client->lease->ia); |
827 | if (r < 0) | |
828 | return r; | |
829 | } | |
3dc34fcc | 830 | |
8006aa32 SA |
831 | if (client->fqdn) { |
832 | r = dhcp6_option_append_fqdn(&opt, &optlen, client->fqdn); | |
833 | if (r < 0) | |
834 | return r; | |
835 | } | |
836 | ||
de8d6e55 SS |
837 | if (client->mudurl) { |
838 | r = dhcp6_option_append(&opt, &optlen, | |
f5e3619b | 839 | SD_DHCP6_OPTION_MUD_URL_V6, strlen(client->mudurl), |
de8d6e55 SS |
840 | client->mudurl); |
841 | if (r < 0) | |
842 | return r; | |
843 | } | |
844 | ||
33923925 SS |
845 | if (client->user_class) { |
846 | r = dhcp6_option_append_user_class(&opt, &optlen, client->user_class); | |
847 | if (r < 0) | |
848 | return r; | |
849 | } | |
850 | ||
73c8ced7 SS |
851 | if (client->vendor_class) { |
852 | r = dhcp6_option_append_vendor_class(&opt, &optlen, client->vendor_class); | |
853 | if (r < 0) | |
854 | return r; | |
855 | } | |
856 | ||
99ccb8ff SS |
857 | if (!ordered_hashmap_isempty(client->vendor_options)) { |
858 | r = dhcp6_option_append_vendor_option(&opt, &optlen, client->vendor_options); | |
859 | if (r < 0) | |
860 | return r; | |
861 | } | |
862 | ||
b261b5f4 | 863 | if (FLAGS_SET(client->request_ia, DHCP6_REQUEST_IA_PD)) { |
73b49d43 | 864 | r = dhcp6_option_append_pd(&opt, &optlen, &client->lease->pd, NULL); |
7c3de8f8 PF |
865 | if (r < 0) |
866 | return r; | |
7c3de8f8 PF |
867 | } |
868 | ||
3dc34fcc PF |
869 | break; |
870 | ||
a9aff361 | 871 | case DHCP6_STATE_STOPPED: |
a34b57c0 | 872 | case DHCP6_STATE_BOUND: |
a9aff361 | 873 | return -EINVAL; |
dd5e9378 YW |
874 | default: |
875 | assert_not_reached(); | |
a9aff361 PF |
876 | } |
877 | ||
2c1ab8ca | 878 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ORO, |
da6fe470 PF |
879 | client->req_opts_len * sizeof(be16_t), |
880 | client->req_opts); | |
881 | if (r < 0) | |
882 | return r; | |
883 | ||
ccd1fc2f | 884 | assert(client->duid_len); |
2c1ab8ca | 885 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_CLIENTID, |
66eac120 | 886 | client->duid_len, &client->duid); |
7246333c PF |
887 | if (r < 0) |
888 | return r; | |
889 | ||
346e13a2 PF |
890 | elapsed_usec = time_now - client->transaction_start; |
891 | if (elapsed_usec < 0xffff * USEC_PER_MSEC * 10) | |
892 | elapsed_time = htobe16(elapsed_usec / USEC_PER_MSEC / 10); | |
893 | else | |
894 | elapsed_time = 0xffff; | |
895 | ||
2c1ab8ca | 896 | r = dhcp6_option_append(&opt, &optlen, SD_DHCP6_OPTION_ELAPSED_TIME, |
346e13a2 PF |
897 | sizeof(elapsed_time), &elapsed_time); |
898 | if (r < 0) | |
899 | return r; | |
900 | ||
90e74a66 | 901 | ORDERED_HASHMAP_FOREACH(j, client->extra_options) { |
e7d5fe17 AD |
902 | r = dhcp6_option_append(&opt, &optlen, j->option, j->length, j->data); |
903 | if (r < 0) | |
904 | return r; | |
905 | } | |
906 | ||
a9aff361 PF |
907 | r = dhcp6_network_send_udp_socket(client->fd, &all_servers, message, |
908 | len - optlen); | |
909 | if (r < 0) | |
910 | return r; | |
911 | ||
912 | log_dhcp6_client(client, "Sent %s", | |
913 | dhcp6_message_type_to_string(message->type)); | |
914 | ||
915 | return 0; | |
916 | } | |
917 | ||
4b558378 | 918 | static int client_timeout_t2(sd_event_source *s, uint64_t usec, void *userdata) { |
a34b57c0 PF |
919 | sd_dhcp6_client *client = userdata; |
920 | ||
a1140666 LP |
921 | assert(s); |
922 | assert(client); | |
923 | assert(client->lease); | |
a34b57c0 | 924 | |
c9393e8c | 925 | (void) event_source_disable(client->timeout_t2); |
a34b57c0 PF |
926 | |
927 | log_dhcp6_client(client, "Timeout T2"); | |
928 | ||
3dc34fcc PF |
929 | client_start(client, DHCP6_STATE_REBIND); |
930 | ||
a34b57c0 PF |
931 | return 0; |
932 | } | |
933 | ||
4b558378 | 934 | static int client_timeout_t1(sd_event_source *s, uint64_t usec, void *userdata) { |
a34b57c0 PF |
935 | sd_dhcp6_client *client = userdata; |
936 | ||
a1140666 LP |
937 | assert(s); |
938 | assert(client); | |
939 | assert(client->lease); | |
a34b57c0 | 940 | |
c9393e8c | 941 | (void) event_source_disable(client->timeout_t1); |
a34b57c0 PF |
942 | |
943 | log_dhcp6_client(client, "Timeout T1"); | |
944 | ||
3dc34fcc PF |
945 | client_start(client, DHCP6_STATE_RENEW); |
946 | ||
a34b57c0 PF |
947 | return 0; |
948 | } | |
949 | ||
4b558378 | 950 | static int client_timeout_resend_expire(sd_event_source *s, uint64_t usec, void *userdata) { |
d1b0afe3 | 951 | sd_dhcp6_client *client = userdata; |
3dc34fcc | 952 | DHCP6_CLIENT_DONT_DESTROY(client); |
dd5e9378 | 953 | DHCP6State state; |
d1b0afe3 PF |
954 | |
955 | assert(s); | |
956 | assert(client); | |
957 | assert(client->event); | |
958 | ||
3dc34fcc PF |
959 | state = client->state; |
960 | ||
10c9ce61 | 961 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE); |
d1b0afe3 | 962 | |
3dc34fcc PF |
963 | /* RFC 3315, section 18.1.4., says that "...the client may choose to |
964 | use a Solicit message to locate a new DHCP server..." */ | |
965 | if (state == DHCP6_STATE_REBIND) | |
966 | client_start(client, DHCP6_STATE_SOLICITATION); | |
967 | ||
d1b0afe3 PF |
968 | return 0; |
969 | } | |
970 | ||
971 | static usec_t client_timeout_compute_random(usec_t val) { | |
9de8a425 | 972 | return val - (random_u32() % USEC_PER_SEC) * val / 10 / USEC_PER_SEC; |
d1b0afe3 PF |
973 | } |
974 | ||
4b558378 | 975 | static int client_timeout_resend(sd_event_source *s, uint64_t usec, void *userdata) { |
d1b0afe3 PF |
976 | int r = 0; |
977 | sd_dhcp6_client *client = userdata; | |
4b4923e6 | 978 | usec_t time_now, init_retransmit_time = 0, max_retransmit_time = 0; |
5e913450 | 979 | usec_t max_retransmit_duration = 0; |
513a6fa8 | 980 | uint8_t max_retransmit_count = 0; |
d1b0afe3 PF |
981 | |
982 | assert(s); | |
983 | assert(client); | |
984 | assert(client->event); | |
985 | ||
c9393e8c | 986 | (void) event_source_disable(client->timeout_resend); |
d1b0afe3 PF |
987 | |
988 | switch (client->state) { | |
bbfa43ca PF |
989 | case DHCP6_STATE_INFORMATION_REQUEST: |
990 | init_retransmit_time = DHCP6_INF_TIMEOUT; | |
991 | max_retransmit_time = DHCP6_INF_MAX_RT; | |
992 | ||
993 | break; | |
994 | ||
d1b0afe3 | 995 | case DHCP6_STATE_SOLICITATION: |
7246333c PF |
996 | |
997 | if (client->retransmit_count && client->lease) { | |
998 | client_start(client, DHCP6_STATE_REQUEST); | |
999 | return 0; | |
1000 | } | |
1001 | ||
d1b0afe3 PF |
1002 | init_retransmit_time = DHCP6_SOL_TIMEOUT; |
1003 | max_retransmit_time = DHCP6_SOL_MAX_RT; | |
d1b0afe3 PF |
1004 | |
1005 | break; | |
1006 | ||
7246333c PF |
1007 | case DHCP6_STATE_REQUEST: |
1008 | init_retransmit_time = DHCP6_REQ_TIMEOUT; | |
1009 | max_retransmit_time = DHCP6_REQ_MAX_RT; | |
1010 | max_retransmit_count = DHCP6_REQ_MAX_RC; | |
7246333c PF |
1011 | |
1012 | break; | |
1013 | ||
3dc34fcc PF |
1014 | case DHCP6_STATE_RENEW: |
1015 | init_retransmit_time = DHCP6_REN_TIMEOUT; | |
1016 | max_retransmit_time = DHCP6_REN_MAX_RT; | |
3dc34fcc PF |
1017 | |
1018 | /* RFC 3315, section 18.1.3. says max retransmit duration will | |
1019 | be the remaining time until T2. Instead of setting MRD, | |
1020 | wait for T2 to trigger with the same end result */ | |
3dc34fcc PF |
1021 | |
1022 | break; | |
1023 | ||
1024 | case DHCP6_STATE_REBIND: | |
1025 | init_retransmit_time = DHCP6_REB_TIMEOUT; | |
1026 | max_retransmit_time = DHCP6_REB_MAX_RT; | |
3dc34fcc | 1027 | |
c9393e8c | 1028 | if (event_source_is_enabled(client->timeout_resend_expire) <= 0) { |
3ae01632 YW |
1029 | uint32_t expire = 0; |
1030 | ||
1031 | r = dhcp6_lease_ia_rebind_expire(&client->lease->ia, &expire); | |
3dc34fcc PF |
1032 | if (r < 0) { |
1033 | client_stop(client, r); | |
1034 | return 0; | |
1035 | } | |
1036 | max_retransmit_duration = expire * USEC_PER_SEC; | |
1037 | } | |
1038 | ||
1039 | break; | |
1040 | ||
d1b0afe3 | 1041 | case DHCP6_STATE_STOPPED: |
a34b57c0 | 1042 | case DHCP6_STATE_BOUND: |
d1b0afe3 | 1043 | return 0; |
dd5e9378 YW |
1044 | default: |
1045 | assert_not_reached(); | |
d1b0afe3 PF |
1046 | } |
1047 | ||
3ae01632 | 1048 | if (max_retransmit_count > 0 && |
d1b0afe3 | 1049 | client->retransmit_count >= max_retransmit_count) { |
10c9ce61 | 1050 | client_stop(client, SD_DHCP6_CLIENT_EVENT_RETRANS_MAX); |
d1b0afe3 PF |
1051 | return 0; |
1052 | } | |
1053 | ||
fa94c34b | 1054 | r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now); |
d1b0afe3 PF |
1055 | if (r < 0) |
1056 | goto error; | |
1057 | ||
346e13a2 PF |
1058 | r = client_send_message(client, time_now); |
1059 | if (r >= 0) | |
1060 | client->retransmit_count++; | |
1061 | ||
3ae01632 | 1062 | if (client->retransmit_time == 0) { |
d1b0afe3 PF |
1063 | client->retransmit_time = |
1064 | client_timeout_compute_random(init_retransmit_time); | |
a9aff361 PF |
1065 | |
1066 | if (client->state == DHCP6_STATE_SOLICITATION) | |
1067 | client->retransmit_time += init_retransmit_time / 10; | |
1068 | ||
d1b0afe3 | 1069 | } else { |
3ae01632 | 1070 | if (max_retransmit_time > 0 && |
d1b0afe3 PF |
1071 | client->retransmit_time > max_retransmit_time / 2) |
1072 | client->retransmit_time = client_timeout_compute_random(max_retransmit_time); | |
1073 | else | |
1074 | client->retransmit_time += client_timeout_compute_random(client->retransmit_time); | |
1075 | } | |
1076 | ||
1077 | log_dhcp6_client(client, "Next retransmission in %s", | |
5291f26d | 1078 | FORMAT_TIMESPAN(client->retransmit_time, USEC_PER_SEC)); |
d1b0afe3 | 1079 | |
c9393e8c YW |
1080 | r = event_reset_time(client->event, &client->timeout_resend, |
1081 | clock_boottime_or_monotonic(), | |
1082 | time_now + client->retransmit_time, 10 * USEC_PER_MSEC, | |
1083 | client_timeout_resend, client, | |
1084 | client->event_priority, "dhcp6-resend-timer", true); | |
d1b0afe3 PF |
1085 | if (r < 0) |
1086 | goto error; | |
1087 | ||
3ae01632 | 1088 | if (max_retransmit_duration > 0 && event_source_is_enabled(client->timeout_resend_expire) <= 0) { |
d1b0afe3 PF |
1089 | |
1090 | log_dhcp6_client(client, "Max retransmission duration %"PRIu64" secs", | |
1091 | max_retransmit_duration / USEC_PER_SEC); | |
1092 | ||
c9393e8c YW |
1093 | r = event_reset_time(client->event, &client->timeout_resend_expire, |
1094 | clock_boottime_or_monotonic(), | |
1095 | time_now + max_retransmit_duration, USEC_PER_SEC, | |
1096 | client_timeout_resend_expire, client, | |
1097 | client->event_priority, "dhcp6-resend-expire-timer", true); | |
9021bb9f TG |
1098 | if (r < 0) |
1099 | goto error; | |
d1b0afe3 PF |
1100 | } |
1101 | ||
1102 | error: | |
1103 | if (r < 0) | |
1104 | client_stop(client, r); | |
1105 | ||
1106 | return 0; | |
1107 | } | |
1108 | ||
f12abb48 | 1109 | static int client_ensure_iaid(sd_dhcp6_client *client) { |
cfb5b380 | 1110 | int r; |
6d13616b | 1111 | uint32_t iaid; |
f12abb48 PF |
1112 | |
1113 | assert(client); | |
1114 | ||
8217ed5e | 1115 | if (client->iaid_set) |
f12abb48 PF |
1116 | return 0; |
1117 | ||
8d71f2b3 YW |
1118 | r = dhcp_identifier_set_iaid(client->ifindex, client->mac_addr, client->mac_addr_len, |
1119 | /* legacy_unstable_byteorder = */ true, | |
1120 | /* use_mac = */ client->test_mode, | |
1121 | &iaid); | |
cfb5b380 TG |
1122 | if (r < 0) |
1123 | return r; | |
f12abb48 | 1124 | |
69b43997 PF |
1125 | client->ia_na.ia_na.id = iaid; |
1126 | client->ia_pd.ia_pd.id = iaid; | |
8217ed5e | 1127 | client->iaid_set = true; |
69b43997 | 1128 | |
f12abb48 PF |
1129 | return 0; |
1130 | } | |
1131 | ||
4b558378 ZJS |
1132 | static int client_parse_message( |
1133 | sd_dhcp6_client *client, | |
1134 | DHCP6Message *message, | |
1135 | size_t len, | |
1136 | sd_dhcp6_lease *lease) { | |
da07cf35 | 1137 | |
8a895550 | 1138 | uint32_t lt_t1 = UINT32_MAX, lt_t2 = UINT32_MAX; |
5c95a913 | 1139 | usec_t irt = IRT_DEFAULT; |
da07cf35 | 1140 | bool clientid = false; |
631bbe71 | 1141 | int r; |
631bbe71 | 1142 | |
a1140666 LP |
1143 | assert(client); |
1144 | assert(message); | |
1145 | assert(len >= sizeof(DHCP6Message)); | |
1146 | assert(lease); | |
1147 | ||
44481a8b | 1148 | len -= sizeof(DHCP6Message); |
548c33d7 YW |
1149 | for (size_t offset = 0; offset < len;) { |
1150 | uint16_t optcode; | |
1151 | size_t optlen; | |
1152 | const uint8_t *optval; | |
44481a8b | 1153 | |
548c33d7 YW |
1154 | r = dhcp6_option_parse(message->options, len, &offset, &optcode, &optlen, &optval); |
1155 | if (r < 0) | |
1156 | return r; | |
8a895550 | 1157 | |
631bbe71 | 1158 | switch (optcode) { |
2c1ab8ca | 1159 | case SD_DHCP6_OPTION_CLIENTID: |
0eec7f5f YW |
1160 | if (clientid) |
1161 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EINVAL), "%s contains multiple clientids", | |
1162 | dhcp6_message_type_to_string(message->type)); | |
631bbe71 | 1163 | |
66eac120 | 1164 | if (optlen != client->duid_len || |
0eec7f5f YW |
1165 | memcmp(&client->duid, optval, optlen) != 0) |
1166 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EINVAL), "%s DUID does not match", | |
1167 | dhcp6_message_type_to_string(message->type)); | |
631bbe71 | 1168 | |
631bbe71 PF |
1169 | clientid = true; |
1170 | ||
1171 | break; | |
1172 | ||
2c1ab8ca | 1173 | case SD_DHCP6_OPTION_SERVERID: |
99f1d3fc | 1174 | r = dhcp6_lease_get_serverid(lease, NULL, NULL); |
0eec7f5f YW |
1175 | if (r >= 0) |
1176 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EINVAL), "%s contains multiple serverids", | |
1177 | dhcp6_message_type_to_string(message->type)); | |
631bbe71 PF |
1178 | |
1179 | r = dhcp6_lease_set_serverid(lease, optval, optlen); | |
1180 | if (r < 0) | |
1181 | return r; | |
1182 | ||
1183 | break; | |
1184 | ||
2c1ab8ca | 1185 | case SD_DHCP6_OPTION_PREFERENCE: |
631bbe71 PF |
1186 | if (optlen != 1) |
1187 | return -EINVAL; | |
1188 | ||
3bc424a3 | 1189 | r = dhcp6_lease_set_preference(lease, optval[0]); |
631bbe71 PF |
1190 | if (r < 0) |
1191 | return r; | |
1192 | ||
1193 | break; | |
1194 | ||
4af39cb8 YW |
1195 | case SD_DHCP6_OPTION_STATUS_CODE: { |
1196 | _cleanup_free_ char *msg = NULL; | |
91c43f39 | 1197 | |
4af39cb8 YW |
1198 | r = dhcp6_option_parse_status(optval, optlen, &msg); |
1199 | if (r < 0) | |
1200 | return r; | |
631bbe71 | 1201 | |
4af39cb8 YW |
1202 | if (r > 0) |
1203 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EINVAL), | |
1204 | "Received %s message with non-zero status: %s%s%s", | |
1205 | dhcp6_message_type_to_string(message->type), | |
1206 | strempty(msg), isempty(msg) ? "" : ": ", | |
1207 | dhcp6_message_status_to_string(r)); | |
631bbe71 | 1208 | break; |
4af39cb8 | 1209 | } |
8a895550 YW |
1210 | case SD_DHCP6_OPTION_IA_NA: { |
1211 | _cleanup_(dhcp6_lease_free_ia) DHCP6IA ia = {}; | |
1212 | ||
bbfa43ca | 1213 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { |
0eec7f5f | 1214 | log_dhcp6_client(client, "Ignoring IA NA option in information requesting mode."); |
bbfa43ca PF |
1215 | break; |
1216 | } | |
1217 | ||
8a895550 YW |
1218 | r = dhcp6_option_parse_ia(client, client->ia_pd.ia_na.id, optcode, optlen, optval, &ia); |
1219 | if (r == -ENOMEM) | |
631bbe71 | 1220 | return r; |
8a895550 | 1221 | if (r < 0) |
5c95a913 | 1222 | continue; |
5c95a913 | 1223 | |
b47fb949 | 1224 | if (lease->ia.addresses) { |
8a895550 YW |
1225 | log_dhcp6_client(client, "Received duplicate matching IA_NA option, ignoring."); |
1226 | continue; | |
b47fb949 PF |
1227 | } |
1228 | ||
8a895550 YW |
1229 | lease->ia = ia; |
1230 | ia = (DHCP6IA) {}; | |
1231 | ||
1232 | lt_t1 = MIN(lt_t1, be32toh(lease->ia.ia_na.lifetime_t1)); | |
1233 | lt_t2 = MIN(lt_t2, be32toh(lease->ia.ia_na.lifetime_t2)); | |
1234 | ||
dce6563f | 1235 | break; |
8a895550 YW |
1236 | } |
1237 | case SD_DHCP6_OPTION_IA_PD: { | |
1238 | _cleanup_(dhcp6_lease_free_ia) DHCP6IA ia = {}; | |
dce6563f | 1239 | |
dce6563f | 1240 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { |
0eec7f5f | 1241 | log_dhcp6_client(client, "Ignoring IA PD option in information requesting mode."); |
dce6563f PF |
1242 | break; |
1243 | } | |
1244 | ||
8a895550 YW |
1245 | r = dhcp6_option_parse_ia(client, client->ia_pd.ia_pd.id, optcode, optlen, optval, &ia); |
1246 | if (r == -ENOMEM) | |
dce6563f | 1247 | return r; |
8a895550 | 1248 | if (r < 0) |
5c95a913 | 1249 | continue; |
5c95a913 | 1250 | |
b47fb949 | 1251 | if (lease->pd.addresses) { |
8a895550 YW |
1252 | log_dhcp6_client(client, "Received duplicate matching IA_PD option, ignoring."); |
1253 | continue; | |
b47fb949 PF |
1254 | } |
1255 | ||
8a895550 YW |
1256 | lease->pd = ia; |
1257 | ia = (DHCP6IA) {}; | |
ed6ee219 | 1258 | |
8a895550 YW |
1259 | lt_t1 = MIN(lt_t1, be32toh(lease->pd.ia_pd.lifetime_t1)); |
1260 | lt_t2 = MIN(lt_t2, be32toh(lease->pd.ia_pd.lifetime_t2)); | |
1261 | ||
1262 | break; | |
1263 | } | |
2c1ab8ca | 1264 | case SD_DHCP6_OPTION_RAPID_COMMIT: |
ed6ee219 PF |
1265 | r = dhcp6_lease_set_rapid_commit(lease); |
1266 | if (r < 0) | |
1267 | return r; | |
1268 | ||
1269 | break; | |
7bd8e95d | 1270 | |
2c1ab8ca | 1271 | case SD_DHCP6_OPTION_DNS_SERVERS: |
e210f027 | 1272 | r = dhcp6_lease_add_dns(lease, optval, optlen); |
7bd8e95d PF |
1273 | if (r < 0) |
1274 | return r; | |
1275 | ||
1276 | break; | |
5da1b97f | 1277 | |
2c1ab8ca | 1278 | case SD_DHCP6_OPTION_DOMAIN_LIST: |
41b14f03 | 1279 | r = dhcp6_lease_add_domains(lease, optval, optlen); |
5da1b97f PF |
1280 | if (r < 0) |
1281 | return r; | |
1282 | ||
1283 | break; | |
1284 | ||
2c1ab8ca | 1285 | case SD_DHCP6_OPTION_NTP_SERVER: |
9c3d46bf | 1286 | r = dhcp6_lease_add_ntp(lease, optval, optlen); |
6599680e PF |
1287 | if (r < 0) |
1288 | return r; | |
1289 | ||
1290 | break; | |
41e4615d | 1291 | |
2c1ab8ca | 1292 | case SD_DHCP6_OPTION_SNTP_SERVERS: |
e693e969 | 1293 | r = dhcp6_lease_add_sntp(lease, optval, optlen); |
41e4615d PF |
1294 | if (r < 0) |
1295 | return r; | |
1296 | ||
1297 | break; | |
fcb51238 | 1298 | |
f5e3619b | 1299 | case SD_DHCP6_OPTION_CLIENT_FQDN: |
c43eea9f BG |
1300 | r = dhcp6_lease_set_fqdn(lease, optval, optlen); |
1301 | if (r < 0) | |
1302 | return r; | |
1303 | ||
1304 | break; | |
1305 | ||
fcb51238 | 1306 | case SD_DHCP6_OPTION_INFORMATION_REFRESH_TIME: |
6ffe71d0 YW |
1307 | if (optlen != 4) |
1308 | return -EINVAL; | |
1309 | ||
0eb5e6d3 | 1310 | irt = unaligned_read_be32((be32_t *) optval) * USEC_PER_SEC; |
fcb51238 | 1311 | break; |
631bbe71 PF |
1312 | } |
1313 | } | |
1314 | ||
0eec7f5f YW |
1315 | if (!clientid) |
1316 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EINVAL), "%s has incomplete options", | |
1317 | dhcp6_message_type_to_string(message->type)); | |
631bbe71 | 1318 | |
bbfa43ca | 1319 | if (client->state != DHCP6_STATE_INFORMATION_REQUEST) { |
99f1d3fc | 1320 | r = dhcp6_lease_get_serverid(lease, NULL, NULL); |
0eec7f5f YW |
1321 | if (r < 0) |
1322 | return log_dhcp6_client_errno(client, r, "%s has no server id", | |
1323 | dhcp6_message_type_to_string(message->type)); | |
b47fb949 | 1324 | |
8a895550 YW |
1325 | if (!lease->ia.addresses && !lease->pd.addresses) |
1326 | return log_dhcp6_client_errno(client, SYNTHETIC_ERRNO(EINVAL), "No IA_PD prefix or IA_NA address received. Ignoring."); | |
b47fb949 | 1327 | |
8a895550 YW |
1328 | if (lease->ia.addresses) { |
1329 | lease->ia.ia_na.lifetime_t1 = htobe32(lt_t1); | |
1330 | lease->ia.ia_na.lifetime_t2 = htobe32(lt_t2); | |
1331 | } | |
1332 | ||
1333 | if (lease->pd.addresses) { | |
1334 | lease->pd.ia_pd.lifetime_t1 = htobe32(lt_t1); | |
1335 | lease->pd.ia_pd.lifetime_t2 = htobe32(lt_t2); | |
1336 | } | |
bbfa43ca | 1337 | } |
631bbe71 | 1338 | |
fcb51238 YW |
1339 | client->information_refresh_time_usec = MAX(irt, IRT_MINIMUM); |
1340 | ||
21a9905c | 1341 | return 0; |
631bbe71 PF |
1342 | } |
1343 | ||
0ae0e5cd | 1344 | static int client_receive_reply(sd_dhcp6_client *client, DHCP6Message *reply, size_t len) { |
4afd3348 | 1345 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
ed6ee219 | 1346 | bool rapid_commit; |
a1140666 LP |
1347 | int r; |
1348 | ||
1349 | assert(client); | |
1350 | assert(reply); | |
a34b57c0 | 1351 | |
59f1ded8 | 1352 | if (reply->type != DHCP6_MESSAGE_REPLY) |
ed6ee219 | 1353 | return 0; |
a34b57c0 PF |
1354 | |
1355 | r = dhcp6_lease_new(&lease); | |
1356 | if (r < 0) | |
1357 | return -ENOMEM; | |
1358 | ||
1359 | r = client_parse_message(client, reply, len, lease); | |
1360 | if (r < 0) | |
1361 | return r; | |
1362 | ||
ed6ee219 PF |
1363 | if (client->state == DHCP6_STATE_SOLICITATION) { |
1364 | r = dhcp6_lease_get_rapid_commit(lease, &rapid_commit); | |
1365 | if (r < 0) | |
1366 | return r; | |
1367 | ||
1368 | if (!rapid_commit) | |
1369 | return 0; | |
1370 | } | |
1371 | ||
431a4bc8 YW |
1372 | sd_dhcp6_lease_unref(client->lease); |
1373 | client->lease = TAKE_PTR(lease); | |
a34b57c0 PF |
1374 | |
1375 | return DHCP6_STATE_BOUND; | |
1376 | } | |
1377 | ||
0ae0e5cd | 1378 | static int client_receive_advertise(sd_dhcp6_client *client, DHCP6Message *advertise, size_t len) { |
4afd3348 | 1379 | _cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL; |
631bbe71 | 1380 | uint8_t pref_advertise = 0, pref_lease = 0; |
a1140666 | 1381 | int r; |
631bbe71 | 1382 | |
59f1ded8 | 1383 | if (advertise->type != DHCP6_MESSAGE_ADVERTISE) |
ed6ee219 | 1384 | return 0; |
631bbe71 PF |
1385 | |
1386 | r = dhcp6_lease_new(&lease); | |
1387 | if (r < 0) | |
1388 | return r; | |
1389 | ||
1390 | r = client_parse_message(client, advertise, len, lease); | |
1391 | if (r < 0) | |
1392 | return r; | |
1393 | ||
1394 | r = dhcp6_lease_get_preference(lease, &pref_advertise); | |
1395 | if (r < 0) | |
1396 | return r; | |
1397 | ||
1398 | r = dhcp6_lease_get_preference(client->lease, &pref_lease); | |
bbfa43ca PF |
1399 | |
1400 | if (r < 0 || pref_advertise > pref_lease) { | |
431a4bc8 YW |
1401 | sd_dhcp6_lease_unref(client->lease); |
1402 | client->lease = TAKE_PTR(lease); | |
631bbe71 PF |
1403 | r = 0; |
1404 | } | |
1405 | ||
7246333c PF |
1406 | if (pref_advertise == 255 || client->retransmit_count > 1) |
1407 | r = DHCP6_STATE_REQUEST; | |
1408 | ||
631bbe71 PF |
1409 | return r; |
1410 | } | |
1411 | ||
004845d1 LP |
1412 | static int client_receive_message( |
1413 | sd_event_source *s, | |
1414 | int fd, uint32_t | |
1415 | revents, | |
1416 | void *userdata) { | |
1417 | ||
631bbe71 | 1418 | sd_dhcp6_client *client = userdata; |
3f0c075f | 1419 | DHCP6_CLIENT_DONT_DESTROY(client); |
0d43d2fc | 1420 | _cleanup_free_ DHCP6Message *message = NULL; |
4edc2c9b LP |
1421 | ssize_t buflen, len; |
1422 | int r = 0; | |
631bbe71 PF |
1423 | |
1424 | assert(s); | |
1425 | assert(client); | |
1426 | assert(client->event); | |
1427 | ||
4edc2c9b | 1428 | buflen = next_datagram_size_fd(fd); |
d46b79bb | 1429 | if (buflen == -ENETDOWN) |
22a3fd2d BG |
1430 | /* the link is down. Don't return an error or the I/O event |
1431 | source will be disconnected and we won't be able to receive | |
1432 | packets again when the link comes back. */ | |
1433 | return 0; | |
4edc2c9b LP |
1434 | if (buflen < 0) |
1435 | return buflen; | |
631bbe71 | 1436 | |
0d43d2fc | 1437 | message = malloc(buflen); |
631bbe71 PF |
1438 | if (!message) |
1439 | return -ENOMEM; | |
1440 | ||
cf447cb6 | 1441 | len = recv(fd, message, buflen, 0); |
0d43d2fc | 1442 | if (len < 0) { |
22a3fd2d BG |
1443 | /* see comment above for why we shouldn't error out on ENETDOWN. */ |
1444 | if (IN_SET(errno, EAGAIN, EINTR, ENETDOWN)) | |
0d43d2fc TG |
1445 | return 0; |
1446 | ||
bd9a7221 | 1447 | return log_dhcp6_client_errno(client, errno, "Could not receive message from UDP socket: %m"); |
0d43d2fc | 1448 | |
004845d1 LP |
1449 | } |
1450 | if ((size_t) len < sizeof(DHCP6Message)) { | |
1451 | log_dhcp6_client(client, "Too small to be DHCP6 message: ignoring"); | |
631bbe71 | 1452 | return 0; |
004845d1 | 1453 | } |
631bbe71 | 1454 | |
59f1ded8 YW |
1455 | if (!IN_SET(message->type, DHCP6_MESSAGE_ADVERTISE, DHCP6_MESSAGE_REPLY, DHCP6_MESSAGE_RECONFIGURE)) { |
1456 | const char *type_str = dhcp6_message_type_to_string(message->type); | |
1457 | if (type_str) | |
1458 | log_dhcp6_client(client, "Received unexpected %s message, ignoring.", type_str); | |
1459 | else | |
1460 | log_dhcp6_client(client, "Received unsupported message type %u, ignoring.", message->type); | |
631bbe71 PF |
1461 | return 0; |
1462 | } | |
1463 | ||
d7799877 | 1464 | if (client->transaction_id != (message->transaction_id & htobe32(0x00ffffff))) |
631bbe71 PF |
1465 | return 0; |
1466 | ||
1467 | switch (client->state) { | |
bbfa43ca PF |
1468 | case DHCP6_STATE_INFORMATION_REQUEST: |
1469 | r = client_receive_reply(client, message, len); | |
d7799877 YW |
1470 | if (r < 0) { |
1471 | log_dhcp6_client_errno(client, r, "Failed to process received reply message, ignoring: %m"); | |
bbfa43ca | 1472 | return 0; |
d7799877 | 1473 | } |
bbfa43ca | 1474 | |
10c9ce61 | 1475 | client_notify(client, SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST); |
bbfa43ca PF |
1476 | |
1477 | client_start(client, DHCP6_STATE_STOPPED); | |
1478 | ||
1479 | break; | |
1480 | ||
631bbe71 PF |
1481 | case DHCP6_STATE_SOLICITATION: |
1482 | r = client_receive_advertise(client, message, len); | |
d7799877 YW |
1483 | if (r < 0) { |
1484 | log_dhcp6_client_errno(client, r, "Failed to process received advertise message, ignoring: %m"); | |
1485 | return 0; | |
1486 | } | |
631bbe71 | 1487 | |
ed6ee219 | 1488 | if (r == DHCP6_STATE_REQUEST) { |
7246333c | 1489 | client_start(client, r); |
ed6ee219 PF |
1490 | break; |
1491 | } | |
631bbe71 | 1492 | |
d7b34e38 | 1493 | _fallthrough_; /* for Solicitation Rapid Commit option check */ |
7246333c | 1494 | case DHCP6_STATE_REQUEST: |
3dc34fcc PF |
1495 | case DHCP6_STATE_RENEW: |
1496 | case DHCP6_STATE_REBIND: | |
1497 | ||
a34b57c0 | 1498 | r = client_receive_reply(client, message, len); |
d7799877 YW |
1499 | if (r < 0) { |
1500 | log_dhcp6_client_errno(client, r, "Failed to process received reply message, ignoring: %m"); | |
a34b57c0 | 1501 | return 0; |
d7799877 | 1502 | } |
a34b57c0 PF |
1503 | |
1504 | if (r == DHCP6_STATE_BOUND) { | |
a34b57c0 PF |
1505 | r = client_start(client, DHCP6_STATE_BOUND); |
1506 | if (r < 0) { | |
1507 | client_stop(client, r); | |
1508 | return 0; | |
1509 | } | |
1510 | ||
10c9ce61 | 1511 | client_notify(client, SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE); |
a34b57c0 PF |
1512 | } |
1513 | ||
1514 | break; | |
1515 | ||
1516 | case DHCP6_STATE_BOUND: | |
1517 | ||
1518 | break; | |
1519 | ||
631bbe71 | 1520 | case DHCP6_STATE_STOPPED: |
631bbe71 | 1521 | return 0; |
dd5e9378 YW |
1522 | default: |
1523 | assert_not_reached(); | |
631bbe71 PF |
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 | ||
b261b5f4 | 1537 | if (FLAGS_SET(client->request_ia, DHCP6_REQUEST_IA_NA) && client->lease->ia.addresses) { |
134ebaa4 PF |
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 | ||
b261b5f4 | 1544 | if (FLAGS_SET(client->request_ia, DHCP6_REQUEST_IA_PD) && client->lease->pd.addresses) { |
134ebaa4 PF |
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 | ||
dd5e9378 | 1554 | static int client_start(sd_dhcp6_client *client, DHCP6State state) { |
f12abb48 | 1555 | int r; |
a34b57c0 | 1556 | usec_t timeout, time_now; |
134ebaa4 | 1557 | uint32_t lifetime_t1, lifetime_t2; |
f12abb48 PF |
1558 | |
1559 | assert_return(client, -EINVAL); | |
1560 | assert_return(client->event, -EINVAL); | |
2f8e7633 | 1561 | assert_return(client->ifindex > 0, -EINVAL); |
c3e2adea | 1562 | assert_return(client->state != state, -EINVAL); |
f12abb48 | 1563 | |
c9393e8c YW |
1564 | (void) event_source_disable(client->timeout_resend_expire); |
1565 | (void) event_source_disable(client->timeout_resend); | |
c3e2adea PF |
1566 | client->retransmit_time = 0; |
1567 | client->retransmit_count = 0; | |
f12abb48 | 1568 | |
38a03f06 LP |
1569 | r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now); |
1570 | if (r < 0) | |
1571 | return r; | |
346e13a2 | 1572 | |
7ac6c26a PF |
1573 | if (!client->receive_message) { |
1574 | r = sd_event_add_io(client->event, &client->receive_message, | |
1575 | client->fd, EPOLLIN, client_receive_message, | |
1576 | client); | |
1577 | if (r < 0) | |
1578 | goto error; | |
1579 | ||
1580 | r = sd_event_source_set_priority(client->receive_message, | |
1581 | client->event_priority); | |
1582 | if (r < 0) | |
1583 | goto error; | |
1584 | ||
1585 | r = sd_event_source_set_description(client->receive_message, | |
1586 | "dhcp6-receive-message"); | |
1587 | if (r < 0) | |
1588 | goto error; | |
1589 | } | |
1590 | ||
c3e2adea PF |
1591 | switch (state) { |
1592 | case DHCP6_STATE_STOPPED: | |
bbfa43ca PF |
1593 | if (client->state == DHCP6_STATE_INFORMATION_REQUEST) { |
1594 | client->state = DHCP6_STATE_STOPPED; | |
a9aff361 | 1595 | |
bbfa43ca PF |
1596 | return 0; |
1597 | } | |
9021bb9f | 1598 | |
4831981d | 1599 | _fallthrough_; |
bbfa43ca | 1600 | case DHCP6_STATE_SOLICITATION: |
c3e2adea PF |
1601 | client->state = DHCP6_STATE_SOLICITATION; |
1602 | ||
7246333c PF |
1603 | break; |
1604 | ||
bbfa43ca | 1605 | case DHCP6_STATE_INFORMATION_REQUEST: |
7246333c | 1606 | case DHCP6_STATE_REQUEST: |
3dc34fcc PF |
1607 | case DHCP6_STATE_RENEW: |
1608 | case DHCP6_STATE_REBIND: | |
a34b57c0 | 1609 | |
7246333c PF |
1610 | client->state = state; |
1611 | ||
c3e2adea | 1612 | break; |
a34b57c0 PF |
1613 | |
1614 | case DHCP6_STATE_BOUND: | |
1615 | ||
134ebaa4 PF |
1616 | r = client_get_lifetime(client, &lifetime_t1, &lifetime_t2); |
1617 | if (r < 0) | |
1618 | goto error; | |
a34b57c0 | 1619 | |
134ebaa4 | 1620 | if (lifetime_t1 == 0xffffffff || lifetime_t2 == 0xffffffff) { |
bd9a7221 | 1621 | log_dhcp6_client(client, "Infinite T1 0x%08x or T2 0x%08x", |
134ebaa4 | 1622 | lifetime_t1, lifetime_t2); |
a34b57c0 PF |
1623 | |
1624 | return 0; | |
1625 | } | |
1626 | ||
134ebaa4 | 1627 | timeout = client_timeout_compute_random(lifetime_t1 * USEC_PER_SEC); |
a34b57c0 | 1628 | |
5291f26d | 1629 | log_dhcp6_client(client, "T1 expires in %s", FORMAT_TIMESPAN(timeout, USEC_PER_SEC)); |
a34b57c0 | 1630 | |
c9393e8c YW |
1631 | r = event_reset_time(client->event, &client->timeout_t1, |
1632 | clock_boottime_or_monotonic(), | |
1633 | time_now + timeout, 10 * USEC_PER_SEC, | |
1634 | client_timeout_t1, client, | |
1635 | client->event_priority, "dhcp6-t1-timeout", true); | |
9021bb9f | 1636 | if (r < 0) |
7ac6c26a | 1637 | goto error; |
9021bb9f | 1638 | |
134ebaa4 | 1639 | timeout = client_timeout_compute_random(lifetime_t2 * USEC_PER_SEC); |
a34b57c0 | 1640 | |
5291f26d | 1641 | log_dhcp6_client(client, "T2 expires in %s", FORMAT_TIMESPAN(timeout, USEC_PER_SEC)); |
a34b57c0 | 1642 | |
c9393e8c YW |
1643 | r = event_reset_time(client->event, &client->timeout_t2, |
1644 | clock_boottime_or_monotonic(), | |
1645 | time_now + timeout, 10 * USEC_PER_SEC, | |
1646 | client_timeout_t2, client, | |
1647 | client->event_priority, "dhcp6-t2-timeout", true); | |
9021bb9f | 1648 | if (r < 0) |
7ac6c26a | 1649 | goto error; |
9021bb9f | 1650 | |
3dc34fcc PF |
1651 | client->state = state; |
1652 | ||
a34b57c0 | 1653 | return 0; |
dd5e9378 YW |
1654 | default: |
1655 | assert_not_reached(); | |
c3e2adea | 1656 | } |
a9aff361 | 1657 | |
c3e2adea | 1658 | client->transaction_id = random_u32() & htobe32(0x00ffffff); |
346e13a2 | 1659 | client->transaction_start = time_now; |
d1b0afe3 | 1660 | |
c9393e8c YW |
1661 | r = event_reset_time(client->event, &client->timeout_resend, |
1662 | clock_boottime_or_monotonic(), | |
1663 | 0, 0, | |
1664 | client_timeout_resend, client, | |
1665 | client->event_priority, "dhcp6-resend-timeout", true); | |
9021bb9f | 1666 | if (r < 0) |
7ac6c26a | 1667 | goto error; |
9021bb9f | 1668 | |
f12abb48 | 1669 | return 0; |
7ac6c26a PF |
1670 | |
1671 | error: | |
1672 | client_reset(client); | |
1673 | return r; | |
f12abb48 PF |
1674 | } |
1675 | ||
0ae0e5cd | 1676 | int sd_dhcp6_client_stop(sd_dhcp6_client *client) { |
c8bae363 YW |
1677 | if (!client) |
1678 | return 0; | |
f667c150 | 1679 | |
10c9ce61 | 1680 | client_stop(client, SD_DHCP6_CLIENT_EVENT_STOP); |
139b011a | 1681 | |
7ac6c26a PF |
1682 | client->fd = safe_close(client->fd); |
1683 | ||
139b011a PF |
1684 | return 0; |
1685 | } | |
1686 | ||
f667c150 TG |
1687 | int sd_dhcp6_client_is_running(sd_dhcp6_client *client) { |
1688 | assert_return(client, -EINVAL); | |
1689 | ||
1690 | return client->state != DHCP6_STATE_STOPPED; | |
1691 | } | |
1692 | ||
0ae0e5cd | 1693 | int sd_dhcp6_client_start(sd_dhcp6_client *client) { |
dd5e9378 | 1694 | DHCP6State state = DHCP6_STATE_SOLICITATION; |
6d95e7d9 | 1695 | int r; |
139b011a PF |
1696 | |
1697 | assert_return(client, -EINVAL); | |
1698 | assert_return(client->event, -EINVAL); | |
2f8e7633 | 1699 | assert_return(client->ifindex > 0, -EINVAL); |
94876904 | 1700 | assert_return(in6_addr_is_link_local(&client->local_address) > 0, -EINVAL); |
139b011a | 1701 | |
080e5c2f | 1702 | if (client->state != DHCP6_STATE_STOPPED) |
63348d13 | 1703 | return -EBUSY; |
d7c9c21f | 1704 | |
b261b5f4 | 1705 | if (!client->information_request && client->request_ia == 0) |
f311a62b PF |
1706 | return -EINVAL; |
1707 | ||
c806ffb9 | 1708 | r = client_reset(client); |
f12abb48 PF |
1709 | if (r < 0) |
1710 | return r; | |
1711 | ||
bbfa43ca PF |
1712 | r = client_ensure_iaid(client); |
1713 | if (r < 0) | |
1714 | return r; | |
1715 | ||
cc22955c TH |
1716 | r = client_ensure_duid(client); |
1717 | if (r < 0) | |
1718 | return r; | |
1719 | ||
10a0f27b PF |
1720 | if (client->fd < 0) { |
1721 | r = dhcp6_network_bind_udp_socket(client->ifindex, &client->local_address); | |
1722 | if (r < 0) { | |
1723 | _cleanup_free_ char *p = NULL; | |
1724 | ||
1725 | (void) in_addr_to_string(AF_INET6, (const union in_addr_union*) &client->local_address, &p); | |
1726 | return log_dhcp6_client_errno(client, r, | |
1727 | "Failed to bind to UDP socket at address %s: %m", strna(p)); | |
1728 | } | |
bd9a7221 | 1729 | |
10a0f27b | 1730 | client->fd = r; |
bd9a7221 | 1731 | } |
bbfa43ca | 1732 | |
fcb51238 YW |
1733 | if (client->information_request) { |
1734 | usec_t t = now(CLOCK_MONOTONIC); | |
1735 | ||
1736 | if (t < usec_add(client->information_request_time_usec, client->information_refresh_time_usec)) | |
1737 | return 0; | |
1738 | ||
1739 | client->information_request_time_usec = t; | |
bbfa43ca | 1740 | state = DHCP6_STATE_INFORMATION_REQUEST; |
fcb51238 | 1741 | } |
bbfa43ca PF |
1742 | |
1743 | log_dhcp6_client(client, "Started in %s mode", | |
787dd704 | 1744 | client->information_request ? "Information request" : "Managed"); |
bbfa43ca PF |
1745 | |
1746 | return client_start(client, state); | |
139b011a PF |
1747 | } |
1748 | ||
32d20645 | 1749 | int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event, int64_t priority) { |
139b011a PF |
1750 | int r; |
1751 | ||
1752 | assert_return(client, -EINVAL); | |
1753 | assert_return(!client->event, -EBUSY); | |
1754 | ||
1755 | if (event) | |
1756 | client->event = sd_event_ref(event); | |
1757 | else { | |
1758 | r = sd_event_default(&client->event); | |
1759 | if (r < 0) | |
1760 | return 0; | |
1761 | } | |
1762 | ||
1763 | client->event_priority = priority; | |
1764 | ||
1765 | return 0; | |
1766 | } | |
1767 | ||
1768 | int sd_dhcp6_client_detach_event(sd_dhcp6_client *client) { | |
1769 | assert_return(client, -EINVAL); | |
1770 | ||
1771 | client->event = sd_event_unref(client->event); | |
1772 | ||
1773 | return 0; | |
1774 | } | |
1775 | ||
1776 | sd_event *sd_dhcp6_client_get_event(sd_dhcp6_client *client) { | |
a1140666 | 1777 | assert_return(client, NULL); |
139b011a PF |
1778 | |
1779 | return client->event; | |
1780 | } | |
1781 | ||
8301aa0b YW |
1782 | static sd_dhcp6_client *dhcp6_client_free(sd_dhcp6_client *client) { |
1783 | assert(client); | |
139b011a | 1784 | |
c9393e8c YW |
1785 | client->timeout_resend = sd_event_source_unref(client->timeout_resend); |
1786 | client->timeout_resend_expire = sd_event_source_unref(client->timeout_resend_expire); | |
1787 | client->timeout_t1 = sd_event_source_unref(client->timeout_t1); | |
1788 | client->timeout_t2 = sd_event_source_unref(client->timeout_t2); | |
1789 | ||
3733eec3 LP |
1790 | client_reset(client); |
1791 | ||
10a0f27b PF |
1792 | client->fd = safe_close(client->fd); |
1793 | ||
3733eec3 | 1794 | sd_dhcp6_client_detach_event(client); |
3733eec3 LP |
1795 | |
1796 | free(client->req_opts); | |
8006aa32 | 1797 | free(client->fqdn); |
de8d6e55 | 1798 | free(client->mudurl); |
33923925 | 1799 | |
e7d5fe17 | 1800 | ordered_hashmap_free(client->extra_options); |
33923925 | 1801 | strv_free(client->user_class); |
73c8ced7 | 1802 | strv_free(client->vendor_class); |
61a9fa8f | 1803 | free(client->ifname); |
33923925 | 1804 | |
6b430fdb | 1805 | return mfree(client); |
139b011a PF |
1806 | } |
1807 | ||
8301aa0b YW |
1808 | DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp6_client, sd_dhcp6_client, dhcp6_client_free); |
1809 | ||
0ae0e5cd | 1810 | int sd_dhcp6_client_new(sd_dhcp6_client **ret) { |
4afd3348 | 1811 | _cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL; |
8b8ecac8 | 1812 | _cleanup_free_ be16_t *req_opts = NULL; |
da6fe470 | 1813 | size_t t; |
139b011a PF |
1814 | |
1815 | assert_return(ret, -EINVAL); | |
1816 | ||
8b8ecac8 YW |
1817 | req_opts = new(be16_t, ELEMENTSOF(default_req_opts)); |
1818 | if (!req_opts) | |
139b011a PF |
1819 | return -ENOMEM; |
1820 | ||
8b8ecac8 YW |
1821 | for (t = 0; t < ELEMENTSOF(default_req_opts); t++) |
1822 | req_opts[t] = htobe16(default_req_opts[t]); | |
c806ffb9 | 1823 | |
8b8ecac8 YW |
1824 | client = new(sd_dhcp6_client, 1); |
1825 | if (!client) | |
da6fe470 PF |
1826 | return -ENOMEM; |
1827 | ||
8b8ecac8 YW |
1828 | *client = (sd_dhcp6_client) { |
1829 | .n_ref = 1, | |
1830 | .ia_na.type = SD_DHCP6_OPTION_IA_NA, | |
1831 | .ia_pd.type = SD_DHCP6_OPTION_IA_PD, | |
1832 | .ifindex = -1, | |
b261b5f4 | 1833 | .request_ia = DHCP6_REQUEST_IA_NA, |
8b8ecac8 YW |
1834 | .fd = -1, |
1835 | .req_opts_len = ELEMENTSOF(default_req_opts), | |
2805536b SS |
1836 | .hint_pd_prefix.iapdprefix.lifetime_preferred = (be32_t) -1, |
1837 | .hint_pd_prefix.iapdprefix.lifetime_valid = (be32_t) -1, | |
8b8ecac8 YW |
1838 | .req_opts = TAKE_PTR(req_opts), |
1839 | }; | |
da6fe470 | 1840 | |
1cc6c93a | 1841 | *ret = TAKE_PTR(client); |
139b011a PF |
1842 | |
1843 | return 0; | |
1844 | } |