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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
091214b6 | 2 | /*** |
091214b6 | 3 | Copyright (C) 2017 Intel Corporation. All rights reserved. |
091214b6 PF |
4 | ***/ |
5 | ||
6 | #include <netinet/icmp6.h> | |
7 | #include <arpa/inet.h> | |
8 | ||
9 | #include "networkd-address.h" | |
c555a358 | 10 | #include "networkd-manager.h" |
091214b6 | 11 | #include "networkd-radv.h" |
6e849e95 | 12 | #include "parse-util.h" |
091214b6 | 13 | #include "sd-radv.h" |
6e849e95 PF |
14 | #include "string-util.h" |
15 | ||
9c3b99fe YW |
16 | int config_parse_router_prefix_delegation( |
17 | const char *unit, | |
18 | const char *filename, | |
19 | unsigned line, | |
20 | const char *section, | |
21 | unsigned section_line, | |
22 | const char *lvalue, | |
23 | int ltype, | |
24 | const char *rvalue, | |
25 | void *data, | |
26 | void *userdata) { | |
27 | ||
56a23cb4 PF |
28 | Network *network = userdata; |
29 | int d; | |
30 | ||
31 | assert(filename); | |
32 | assert(section); | |
33 | assert(lvalue); | |
34 | assert(rvalue); | |
35 | assert(data); | |
36 | ||
37 | if (streq(rvalue, "static")) | |
38 | network->router_prefix_delegation = RADV_PREFIX_DELEGATION_STATIC; | |
39 | else if (streq(rvalue, "dhcpv6")) | |
40 | network->router_prefix_delegation = RADV_PREFIX_DELEGATION_DHCP6; | |
41 | else { | |
42 | d = parse_boolean(rvalue); | |
43 | if (d > 0) | |
44 | network->router_prefix_delegation = RADV_PREFIX_DELEGATION_BOTH; | |
45 | else | |
46 | network->router_prefix_delegation = RADV_PREFIX_DELEGATION_NONE; | |
47 | ||
48 | if (d < 0) | |
49 | log_syntax(unit, LOG_ERR, filename, line, -EINVAL, "Router prefix delegation '%s' is invalid, ignoring assignment: %m", rvalue); | |
50 | } | |
51 | ||
52 | return 0; | |
53 | } | |
54 | ||
6e849e95 PF |
55 | int config_parse_router_preference(const char *unit, |
56 | const char *filename, | |
57 | unsigned line, | |
58 | const char *section, | |
59 | unsigned section_line, | |
60 | const char *lvalue, | |
61 | int ltype, | |
62 | const char *rvalue, | |
63 | void *data, | |
64 | void *userdata) { | |
65 | Network *network = userdata; | |
66 | ||
67 | assert(filename); | |
68 | assert(section); | |
69 | assert(lvalue); | |
70 | assert(rvalue); | |
71 | assert(data); | |
72 | ||
73 | if (streq(rvalue, "high")) | |
74 | network->router_preference = SD_NDISC_PREFERENCE_HIGH; | |
75 | else if (STR_IN_SET(rvalue, "medium", "normal", "default")) | |
76 | network->router_preference = SD_NDISC_PREFERENCE_MEDIUM; | |
77 | else if (streq(rvalue, "low")) | |
78 | network->router_preference = SD_NDISC_PREFERENCE_LOW; | |
79 | else | |
80 | log_syntax(unit, LOG_ERR, filename, line, -EINVAL, "Router preference '%s' is invalid, ignoring assignment: %m", rvalue); | |
81 | ||
82 | return 0; | |
83 | } | |
84 | ||
85 | void prefix_free(Prefix *prefix) { | |
86 | if (!prefix) | |
87 | return; | |
88 | ||
89 | if (prefix->network) { | |
90 | LIST_REMOVE(prefixes, prefix->network->static_prefixes, prefix); | |
91 | assert(prefix->network->n_static_prefixes > 0); | |
92 | prefix->network->n_static_prefixes--; | |
93 | ||
94 | if (prefix->section) | |
95 | hashmap_remove(prefix->network->prefixes_by_section, | |
96 | prefix->section); | |
97 | } | |
98 | ||
99 | prefix->radv_prefix = sd_radv_prefix_unref(prefix->radv_prefix); | |
100 | ||
101 | free(prefix); | |
102 | } | |
103 | ||
104 | int prefix_new(Prefix **ret) { | |
15b8332e | 105 | _cleanup_(prefix_freep) Prefix *prefix = NULL; |
6e849e95 PF |
106 | |
107 | prefix = new0(Prefix, 1); | |
108 | if (!prefix) | |
109 | return -ENOMEM; | |
110 | ||
111 | if (sd_radv_prefix_new(&prefix->radv_prefix) < 0) | |
112 | return -ENOMEM; | |
113 | ||
ae2a15bc | 114 | *ret = TAKE_PTR(prefix); |
6e849e95 PF |
115 | |
116 | return 0; | |
117 | } | |
118 | ||
119 | int prefix_new_static(Network *network, const char *filename, | |
120 | unsigned section_line, Prefix **ret) { | |
8e766630 LP |
121 | _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL; |
122 | _cleanup_(prefix_freep) Prefix *prefix = NULL; | |
6e849e95 PF |
123 | int r; |
124 | ||
125 | assert(network); | |
126 | assert(ret); | |
127 | assert(!!filename == (section_line > 0)); | |
128 | ||
129 | if (filename) { | |
130 | r = network_config_section_new(filename, section_line, &n); | |
131 | if (r < 0) | |
132 | return r; | |
133 | ||
134 | if (section_line) { | |
135 | prefix = hashmap_get(network->prefixes_by_section, n); | |
136 | if (prefix) { | |
1cc6c93a | 137 | *ret = TAKE_PTR(prefix); |
6e849e95 PF |
138 | |
139 | return 0; | |
140 | } | |
141 | } | |
142 | } | |
143 | ||
144 | r = prefix_new(&prefix); | |
145 | if (r < 0) | |
146 | return r; | |
147 | ||
148 | if (filename) { | |
1cc6c93a | 149 | prefix->section = TAKE_PTR(n); |
6e849e95 PF |
150 | |
151 | r = hashmap_put(network->prefixes_by_section, prefix->section, | |
152 | prefix); | |
153 | if (r < 0) | |
154 | return r; | |
155 | } | |
156 | ||
157 | prefix->network = network; | |
158 | LIST_APPEND(prefixes, network->static_prefixes, prefix); | |
159 | network->n_static_prefixes++; | |
160 | ||
1cc6c93a | 161 | *ret = TAKE_PTR(prefix); |
6e849e95 PF |
162 | |
163 | return 0; | |
164 | } | |
165 | ||
166 | int config_parse_prefix(const char *unit, | |
167 | const char *filename, | |
168 | unsigned line, | |
169 | const char *section, | |
170 | unsigned section_line, | |
171 | const char *lvalue, | |
172 | int ltype, | |
173 | const char *rvalue, | |
174 | void *data, | |
175 | void *userdata) { | |
176 | ||
177 | Network *network = userdata; | |
8e766630 | 178 | _cleanup_(prefix_freep) Prefix *p = NULL; |
6e849e95 PF |
179 | uint8_t prefixlen = 64; |
180 | union in_addr_union in6addr; | |
181 | int r; | |
182 | ||
183 | assert(filename); | |
184 | assert(section); | |
185 | assert(lvalue); | |
186 | assert(rvalue); | |
187 | assert(data); | |
188 | ||
189 | r = prefix_new_static(network, filename, section_line, &p); | |
190 | if (r < 0) | |
191 | return r; | |
192 | ||
193 | r = in_addr_prefix_from_string(rvalue, AF_INET6, &in6addr, &prefixlen); | |
194 | if (r < 0) { | |
195 | log_syntax(unit, LOG_ERR, filename, line, r, "Prefix is invalid, ignoring assignment: %s", rvalue); | |
196 | return 0; | |
197 | } | |
198 | ||
199 | if (sd_radv_prefix_set_prefix(p->radv_prefix, &in6addr.in6, prefixlen) < 0) | |
200 | return -EADDRNOTAVAIL; | |
201 | ||
202 | log_syntax(unit, LOG_INFO, filename, line, r, "Found prefix %s", rvalue); | |
203 | ||
204 | p = NULL; | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
209 | int config_parse_prefix_flags(const char *unit, | |
210 | const char *filename, | |
211 | unsigned line, | |
212 | const char *section, | |
213 | unsigned section_line, | |
214 | const char *lvalue, | |
215 | int ltype, | |
216 | const char *rvalue, | |
217 | void *data, | |
218 | void *userdata) { | |
219 | Network *network = userdata; | |
8e766630 | 220 | _cleanup_(prefix_freep) Prefix *p = NULL; |
6e849e95 PF |
221 | int r, val; |
222 | ||
223 | assert(filename); | |
224 | assert(section); | |
225 | assert(lvalue); | |
226 | assert(rvalue); | |
227 | assert(data); | |
228 | ||
229 | r = prefix_new_static(network, filename, section_line, &p); | |
230 | if (r < 0) | |
231 | return r; | |
232 | ||
233 | r = parse_boolean(rvalue); | |
234 | if (r < 0) { | |
235 | log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse address flag, ignoring: %s", rvalue); | |
236 | return 0; | |
237 | } | |
238 | ||
239 | val = r; | |
240 | ||
241 | if (streq(lvalue, "OnLink")) | |
242 | r = sd_radv_prefix_set_onlink(p->radv_prefix, val); | |
243 | else if (streq(lvalue, "AddressAutoconfiguration")) | |
244 | r = sd_radv_prefix_set_address_autoconfiguration(p->radv_prefix, val); | |
245 | if (r < 0) | |
246 | return r; | |
247 | ||
248 | p = NULL; | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | int config_parse_prefix_lifetime(const char *unit, | |
254 | const char *filename, | |
255 | unsigned line, | |
256 | const char *section, | |
257 | unsigned section_line, | |
258 | const char *lvalue, | |
259 | int ltype, | |
260 | const char *rvalue, | |
261 | void *data, | |
262 | void *userdata) { | |
263 | Network *network = userdata; | |
8e766630 | 264 | _cleanup_(prefix_freep) Prefix *p = NULL; |
6e849e95 PF |
265 | usec_t usec; |
266 | int r; | |
267 | ||
268 | assert(filename); | |
269 | assert(section); | |
270 | assert(lvalue); | |
271 | assert(rvalue); | |
272 | assert(data); | |
273 | ||
274 | r = prefix_new_static(network, filename, section_line, &p); | |
275 | if (r < 0) | |
276 | return r; | |
277 | ||
278 | r = parse_sec(rvalue, &usec); | |
279 | if (r < 0) { | |
280 | log_syntax(unit, LOG_ERR, filename, line, r, "Lifetime is invalid, ignoring assignment: %s", rvalue); | |
281 | return 0; | |
282 | } | |
283 | ||
284 | /* a value of 0xffffffff represents infinity */ | |
285 | if (streq(lvalue, "PreferredLifetimeSec")) | |
286 | r = sd_radv_prefix_set_preferred_lifetime(p->radv_prefix, | |
287 | DIV_ROUND_UP(usec, USEC_PER_SEC)); | |
288 | else if (streq(lvalue, "ValidLifetimeSec")) | |
289 | r = sd_radv_prefix_set_valid_lifetime(p->radv_prefix, | |
290 | DIV_ROUND_UP(usec, USEC_PER_SEC)); | |
291 | if (r < 0) | |
292 | return r; | |
293 | ||
294 | p = NULL; | |
295 | ||
296 | return 0; | |
297 | } | |
091214b6 | 298 | |
c555a358 PF |
299 | static int radv_get_ip6dns(Network *network, struct in6_addr **dns, |
300 | size_t *n_dns) { | |
301 | _cleanup_free_ struct in6_addr *addresses = NULL; | |
302 | size_t i, n_addresses = 0, n_allocated = 0; | |
303 | ||
304 | assert(network); | |
305 | assert(dns); | |
306 | assert(n_dns); | |
307 | ||
308 | for (i = 0; i < network->n_dns; i++) { | |
309 | union in_addr_union *addr; | |
310 | ||
311 | if (network->dns[i].family != AF_INET6) | |
312 | continue; | |
313 | ||
314 | addr = &network->dns[i].address; | |
315 | ||
316 | if (in_addr_is_null(AF_INET6, addr) || | |
317 | in_addr_is_link_local(AF_INET6, addr) || | |
318 | in_addr_is_localhost(AF_INET6, addr)) | |
319 | continue; | |
320 | ||
321 | if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1)) | |
322 | return -ENOMEM; | |
323 | ||
324 | addresses[n_addresses++] = addr->in6; | |
325 | } | |
326 | ||
327 | if (addresses) { | |
ae2a15bc | 328 | *dns = TAKE_PTR(addresses); |
c555a358 PF |
329 | |
330 | *n_dns = n_addresses; | |
331 | } | |
332 | ||
333 | return n_addresses; | |
334 | } | |
335 | ||
336 | static int radv_set_dns(Link *link, Link *uplink) { | |
337 | _cleanup_free_ struct in6_addr *dns = NULL; | |
338 | size_t n_dns; | |
339 | usec_t lifetime_usec; | |
340 | int r; | |
341 | ||
342 | if (!link->network->router_emit_dns) | |
343 | return 0; | |
344 | ||
345 | if (link->network->router_dns) { | |
346 | dns = newdup(struct in6_addr, link->network->router_dns, | |
347 | link->network->n_router_dns); | |
348 | if (dns == NULL) | |
349 | return -ENOMEM; | |
350 | ||
351 | n_dns = link->network->n_router_dns; | |
352 | lifetime_usec = link->network->router_dns_lifetime_usec; | |
353 | ||
354 | goto set_dns; | |
355 | } | |
356 | ||
357 | lifetime_usec = SD_RADV_DEFAULT_DNS_LIFETIME_USEC; | |
358 | ||
359 | r = radv_get_ip6dns(link->network, &dns, &n_dns); | |
360 | if (r > 0) | |
361 | goto set_dns; | |
362 | ||
363 | if (uplink) { | |
349a981d PF |
364 | if (uplink->network == NULL) { |
365 | log_link_debug(uplink, "Cannot fetch DNS servers as uplink interface is not managed by us"); | |
366 | return 0; | |
367 | } | |
368 | ||
c555a358 PF |
369 | r = radv_get_ip6dns(uplink->network, &dns, &n_dns); |
370 | if (r > 0) | |
371 | goto set_dns; | |
372 | } | |
373 | ||
374 | return 0; | |
375 | ||
376 | set_dns: | |
377 | return sd_radv_set_rdnss(link->radv, | |
378 | DIV_ROUND_UP(lifetime_usec, USEC_PER_SEC), | |
379 | dns, n_dns); | |
380 | } | |
381 | ||
382 | static int radv_set_domains(Link *link, Link *uplink) { | |
383 | char **search_domains; | |
384 | usec_t lifetime_usec; | |
385 | ||
386 | if (!link->network->router_emit_domains) | |
387 | return 0; | |
388 | ||
389 | search_domains = link->network->router_search_domains; | |
390 | lifetime_usec = link->network->router_dns_lifetime_usec; | |
391 | ||
392 | if (search_domains) | |
393 | goto set_domains; | |
394 | ||
395 | lifetime_usec = SD_RADV_DEFAULT_DNS_LIFETIME_USEC; | |
396 | ||
397 | search_domains = link->network->search_domains; | |
398 | if (search_domains) | |
399 | goto set_domains; | |
400 | ||
401 | if (uplink) { | |
349a981d PF |
402 | if (uplink->network == NULL) { |
403 | log_link_debug(uplink, "Cannot fetch DNS search domains as uplink interface is not managed by us"); | |
404 | return 0; | |
405 | } | |
406 | ||
c555a358 PF |
407 | search_domains = uplink->network->search_domains; |
408 | if (search_domains) | |
409 | goto set_domains; | |
410 | } | |
411 | ||
412 | return 0; | |
413 | ||
414 | set_domains: | |
415 | return sd_radv_set_dnssl(link->radv, | |
416 | DIV_ROUND_UP(lifetime_usec, USEC_PER_SEC), | |
417 | search_domains); | |
418 | ||
419 | } | |
420 | ||
421 | int radv_emit_dns(Link *link) { | |
422 | Link *uplink; | |
423 | int r; | |
424 | ||
425 | uplink = manager_find_uplink(link->manager, link); | |
426 | ||
427 | r = radv_set_dns(link, uplink); | |
428 | if (r < 0) | |
429 | log_link_warning_errno(link, r, "Could not set RA DNS: %m"); | |
430 | ||
431 | r = radv_set_domains(link, uplink); | |
432 | if (r < 0) | |
433 | log_link_warning_errno(link, r, "Could not set RA Domains: %m"); | |
434 | ||
435 | return 0; | |
436 | } | |
437 | ||
091214b6 PF |
438 | int radv_configure(Link *link) { |
439 | int r; | |
440 | Prefix *p; | |
441 | ||
442 | assert(link); | |
443 | assert(link->network); | |
444 | ||
445 | r = sd_radv_new(&link->radv); | |
446 | if (r < 0) | |
447 | return r; | |
448 | ||
449 | r = sd_radv_attach_event(link->radv, NULL, 0); | |
450 | if (r < 0) | |
451 | return r; | |
452 | ||
453 | r = sd_radv_set_mac(link->radv, &link->mac); | |
454 | if (r < 0) | |
455 | return r; | |
456 | ||
457 | r = sd_radv_set_ifindex(link->radv, link->ifindex); | |
458 | if (r < 0) | |
459 | return r; | |
460 | ||
461 | r = sd_radv_set_managed_information(link->radv, link->network->router_managed); | |
462 | if (r < 0) | |
463 | return r; | |
464 | ||
465 | r = sd_radv_set_other_information(link->radv, link->network->router_other_information); | |
466 | if (r < 0) | |
467 | return r; | |
468 | ||
301a2fb9 PF |
469 | /* a value of 0xffffffff represents infinity, 0x0 means this host is |
470 | not a router */ | |
091214b6 | 471 | r = sd_radv_set_router_lifetime(link->radv, |
945e3225 | 472 | DIV_ROUND_UP(link->network->router_lifetime_usec, USEC_PER_SEC)); |
091214b6 PF |
473 | if (r < 0) |
474 | return r; | |
475 | ||
476 | if (link->network->router_lifetime_usec > 0) { | |
477 | r = sd_radv_set_preference(link->radv, | |
478 | link->network->router_preference); | |
479 | if (r < 0) | |
480 | return r; | |
481 | } | |
482 | ||
56a23cb4 PF |
483 | if (IN_SET(link->network->router_prefix_delegation, |
484 | RADV_PREFIX_DELEGATION_STATIC, | |
485 | RADV_PREFIX_DELEGATION_BOTH)) { | |
486 | LIST_FOREACH(prefixes, p, link->network->static_prefixes) { | |
d601b566 | 487 | r = sd_radv_add_prefix(link->radv, p->radv_prefix, false); |
56a23cb4 PF |
488 | if (r != -EEXIST && r < 0) |
489 | return r; | |
490 | } | |
091214b6 PF |
491 | } |
492 | ||
c555a358 | 493 | return radv_emit_dns(link); |
091214b6 | 494 | } |