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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
091214b6 | 2 | /*** |
810adae9 | 3 | Copyright © 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 | 14 | #include "string-util.h" |
51517f9e | 15 | #include "strv.h" |
6e849e95 | 16 | |
9c3b99fe YW |
17 | int config_parse_router_prefix_delegation( |
18 | const char *unit, | |
19 | const char *filename, | |
20 | unsigned line, | |
21 | const char *section, | |
22 | unsigned section_line, | |
23 | const char *lvalue, | |
24 | int ltype, | |
25 | const char *rvalue, | |
26 | void *data, | |
27 | void *userdata) { | |
28 | ||
56a23cb4 PF |
29 | Network *network = userdata; |
30 | int d; | |
31 | ||
32 | assert(filename); | |
33 | assert(section); | |
34 | assert(lvalue); | |
35 | assert(rvalue); | |
36 | assert(data); | |
37 | ||
38 | if (streq(rvalue, "static")) | |
39 | network->router_prefix_delegation = RADV_PREFIX_DELEGATION_STATIC; | |
40 | else if (streq(rvalue, "dhcpv6")) | |
41 | network->router_prefix_delegation = RADV_PREFIX_DELEGATION_DHCP6; | |
42 | else { | |
43 | d = parse_boolean(rvalue); | |
44 | if (d > 0) | |
45 | network->router_prefix_delegation = RADV_PREFIX_DELEGATION_BOTH; | |
46 | else | |
47 | network->router_prefix_delegation = RADV_PREFIX_DELEGATION_NONE; | |
48 | ||
49 | if (d < 0) | |
50 | log_syntax(unit, LOG_ERR, filename, line, -EINVAL, "Router prefix delegation '%s' is invalid, ignoring assignment: %m", rvalue); | |
51 | } | |
52 | ||
53 | return 0; | |
54 | } | |
55 | ||
6e849e95 PF |
56 | int config_parse_router_preference(const char *unit, |
57 | const char *filename, | |
58 | unsigned line, | |
59 | const char *section, | |
60 | unsigned section_line, | |
61 | const char *lvalue, | |
62 | int ltype, | |
63 | const char *rvalue, | |
64 | void *data, | |
65 | void *userdata) { | |
66 | Network *network = userdata; | |
67 | ||
68 | assert(filename); | |
69 | assert(section); | |
70 | assert(lvalue); | |
71 | assert(rvalue); | |
72 | assert(data); | |
73 | ||
74 | if (streq(rvalue, "high")) | |
75 | network->router_preference = SD_NDISC_PREFERENCE_HIGH; | |
76 | else if (STR_IN_SET(rvalue, "medium", "normal", "default")) | |
77 | network->router_preference = SD_NDISC_PREFERENCE_MEDIUM; | |
78 | else if (streq(rvalue, "low")) | |
79 | network->router_preference = SD_NDISC_PREFERENCE_LOW; | |
80 | else | |
81 | log_syntax(unit, LOG_ERR, filename, line, -EINVAL, "Router preference '%s' is invalid, ignoring assignment: %m", rvalue); | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
86 | void prefix_free(Prefix *prefix) { | |
87 | if (!prefix) | |
88 | return; | |
89 | ||
90 | if (prefix->network) { | |
91 | LIST_REMOVE(prefixes, prefix->network->static_prefixes, prefix); | |
92 | assert(prefix->network->n_static_prefixes > 0); | |
93 | prefix->network->n_static_prefixes--; | |
94 | ||
95 | if (prefix->section) | |
96 | hashmap_remove(prefix->network->prefixes_by_section, | |
97 | prefix->section); | |
98 | } | |
99 | ||
100 | prefix->radv_prefix = sd_radv_prefix_unref(prefix->radv_prefix); | |
101 | ||
102 | free(prefix); | |
103 | } | |
104 | ||
105 | int prefix_new(Prefix **ret) { | |
15b8332e | 106 | _cleanup_(prefix_freep) Prefix *prefix = NULL; |
6e849e95 PF |
107 | |
108 | prefix = new0(Prefix, 1); | |
109 | if (!prefix) | |
110 | return -ENOMEM; | |
111 | ||
112 | if (sd_radv_prefix_new(&prefix->radv_prefix) < 0) | |
113 | return -ENOMEM; | |
114 | ||
ae2a15bc | 115 | *ret = TAKE_PTR(prefix); |
6e849e95 PF |
116 | |
117 | return 0; | |
118 | } | |
119 | ||
120 | int prefix_new_static(Network *network, const char *filename, | |
121 | unsigned section_line, Prefix **ret) { | |
8e766630 LP |
122 | _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL; |
123 | _cleanup_(prefix_freep) Prefix *prefix = NULL; | |
6e849e95 PF |
124 | int r; |
125 | ||
126 | assert(network); | |
127 | assert(ret); | |
128 | assert(!!filename == (section_line > 0)); | |
129 | ||
130 | if (filename) { | |
131 | r = network_config_section_new(filename, section_line, &n); | |
132 | if (r < 0) | |
133 | return r; | |
134 | ||
135 | if (section_line) { | |
136 | prefix = hashmap_get(network->prefixes_by_section, n); | |
137 | if (prefix) { | |
1cc6c93a | 138 | *ret = TAKE_PTR(prefix); |
6e849e95 PF |
139 | |
140 | return 0; | |
141 | } | |
142 | } | |
143 | } | |
144 | ||
145 | r = prefix_new(&prefix); | |
146 | if (r < 0) | |
147 | return r; | |
148 | ||
149 | if (filename) { | |
1cc6c93a | 150 | prefix->section = TAKE_PTR(n); |
6e849e95 PF |
151 | |
152 | r = hashmap_put(network->prefixes_by_section, prefix->section, | |
153 | prefix); | |
154 | if (r < 0) | |
155 | return r; | |
156 | } | |
157 | ||
158 | prefix->network = network; | |
159 | LIST_APPEND(prefixes, network->static_prefixes, prefix); | |
160 | network->n_static_prefixes++; | |
161 | ||
1cc6c93a | 162 | *ret = TAKE_PTR(prefix); |
6e849e95 PF |
163 | |
164 | return 0; | |
165 | } | |
166 | ||
167 | int config_parse_prefix(const char *unit, | |
168 | const char *filename, | |
169 | unsigned line, | |
170 | const char *section, | |
171 | unsigned section_line, | |
172 | const char *lvalue, | |
173 | int ltype, | |
174 | const char *rvalue, | |
175 | void *data, | |
176 | void *userdata) { | |
177 | ||
178 | Network *network = userdata; | |
8e766630 | 179 | _cleanup_(prefix_freep) Prefix *p = NULL; |
6e849e95 PF |
180 | uint8_t prefixlen = 64; |
181 | union in_addr_union in6addr; | |
182 | int r; | |
183 | ||
184 | assert(filename); | |
185 | assert(section); | |
186 | assert(lvalue); | |
187 | assert(rvalue); | |
188 | assert(data); | |
189 | ||
190 | r = prefix_new_static(network, filename, section_line, &p); | |
191 | if (r < 0) | |
192 | return r; | |
193 | ||
194 | r = in_addr_prefix_from_string(rvalue, AF_INET6, &in6addr, &prefixlen); | |
195 | if (r < 0) { | |
196 | log_syntax(unit, LOG_ERR, filename, line, r, "Prefix is invalid, ignoring assignment: %s", rvalue); | |
197 | return 0; | |
198 | } | |
199 | ||
200 | if (sd_radv_prefix_set_prefix(p->radv_prefix, &in6addr.in6, prefixlen) < 0) | |
201 | return -EADDRNOTAVAIL; | |
202 | ||
203 | log_syntax(unit, LOG_INFO, filename, line, r, "Found prefix %s", rvalue); | |
204 | ||
205 | p = NULL; | |
206 | ||
207 | return 0; | |
208 | } | |
209 | ||
210 | int config_parse_prefix_flags(const char *unit, | |
211 | const char *filename, | |
212 | unsigned line, | |
213 | const char *section, | |
214 | unsigned section_line, | |
215 | const char *lvalue, | |
216 | int ltype, | |
217 | const char *rvalue, | |
218 | void *data, | |
219 | void *userdata) { | |
220 | Network *network = userdata; | |
8e766630 | 221 | _cleanup_(prefix_freep) Prefix *p = NULL; |
6e849e95 PF |
222 | int r, val; |
223 | ||
224 | assert(filename); | |
225 | assert(section); | |
226 | assert(lvalue); | |
227 | assert(rvalue); | |
228 | assert(data); | |
229 | ||
230 | r = prefix_new_static(network, filename, section_line, &p); | |
231 | if (r < 0) | |
232 | return r; | |
233 | ||
234 | r = parse_boolean(rvalue); | |
235 | if (r < 0) { | |
236 | log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse address flag, ignoring: %s", rvalue); | |
237 | return 0; | |
238 | } | |
239 | ||
240 | val = r; | |
241 | ||
242 | if (streq(lvalue, "OnLink")) | |
243 | r = sd_radv_prefix_set_onlink(p->radv_prefix, val); | |
244 | else if (streq(lvalue, "AddressAutoconfiguration")) | |
245 | r = sd_radv_prefix_set_address_autoconfiguration(p->radv_prefix, val); | |
246 | if (r < 0) | |
247 | return r; | |
248 | ||
249 | p = NULL; | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
254 | int config_parse_prefix_lifetime(const char *unit, | |
255 | const char *filename, | |
256 | unsigned line, | |
257 | const char *section, | |
258 | unsigned section_line, | |
259 | const char *lvalue, | |
260 | int ltype, | |
261 | const char *rvalue, | |
262 | void *data, | |
263 | void *userdata) { | |
264 | Network *network = userdata; | |
8e766630 | 265 | _cleanup_(prefix_freep) Prefix *p = NULL; |
6e849e95 PF |
266 | usec_t usec; |
267 | int r; | |
268 | ||
269 | assert(filename); | |
270 | assert(section); | |
271 | assert(lvalue); | |
272 | assert(rvalue); | |
273 | assert(data); | |
274 | ||
275 | r = prefix_new_static(network, filename, section_line, &p); | |
276 | if (r < 0) | |
277 | return r; | |
278 | ||
279 | r = parse_sec(rvalue, &usec); | |
280 | if (r < 0) { | |
281 | log_syntax(unit, LOG_ERR, filename, line, r, "Lifetime is invalid, ignoring assignment: %s", rvalue); | |
282 | return 0; | |
283 | } | |
284 | ||
285 | /* a value of 0xffffffff represents infinity */ | |
286 | if (streq(lvalue, "PreferredLifetimeSec")) | |
287 | r = sd_radv_prefix_set_preferred_lifetime(p->radv_prefix, | |
288 | DIV_ROUND_UP(usec, USEC_PER_SEC)); | |
289 | else if (streq(lvalue, "ValidLifetimeSec")) | |
290 | r = sd_radv_prefix_set_valid_lifetime(p->radv_prefix, | |
291 | DIV_ROUND_UP(usec, USEC_PER_SEC)); | |
292 | if (r < 0) | |
293 | return r; | |
294 | ||
295 | p = NULL; | |
296 | ||
297 | return 0; | |
298 | } | |
091214b6 | 299 | |
c555a358 PF |
300 | static int radv_get_ip6dns(Network *network, struct in6_addr **dns, |
301 | size_t *n_dns) { | |
302 | _cleanup_free_ struct in6_addr *addresses = NULL; | |
303 | size_t i, n_addresses = 0, n_allocated = 0; | |
304 | ||
305 | assert(network); | |
306 | assert(dns); | |
307 | assert(n_dns); | |
308 | ||
309 | for (i = 0; i < network->n_dns; i++) { | |
310 | union in_addr_union *addr; | |
311 | ||
312 | if (network->dns[i].family != AF_INET6) | |
313 | continue; | |
314 | ||
315 | addr = &network->dns[i].address; | |
316 | ||
317 | if (in_addr_is_null(AF_INET6, addr) || | |
318 | in_addr_is_link_local(AF_INET6, addr) || | |
319 | in_addr_is_localhost(AF_INET6, addr)) | |
320 | continue; | |
321 | ||
322 | if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1)) | |
323 | return -ENOMEM; | |
324 | ||
325 | addresses[n_addresses++] = addr->in6; | |
326 | } | |
327 | ||
328 | if (addresses) { | |
ae2a15bc | 329 | *dns = TAKE_PTR(addresses); |
c555a358 PF |
330 | |
331 | *n_dns = n_addresses; | |
332 | } | |
333 | ||
334 | return n_addresses; | |
335 | } | |
336 | ||
337 | static int radv_set_dns(Link *link, Link *uplink) { | |
338 | _cleanup_free_ struct in6_addr *dns = NULL; | |
339 | size_t n_dns; | |
340 | usec_t lifetime_usec; | |
341 | int r; | |
342 | ||
343 | if (!link->network->router_emit_dns) | |
344 | return 0; | |
345 | ||
346 | if (link->network->router_dns) { | |
347 | dns = newdup(struct in6_addr, link->network->router_dns, | |
348 | link->network->n_router_dns); | |
349 | if (dns == NULL) | |
350 | return -ENOMEM; | |
351 | ||
352 | n_dns = link->network->n_router_dns; | |
353 | lifetime_usec = link->network->router_dns_lifetime_usec; | |
354 | ||
355 | goto set_dns; | |
356 | } | |
357 | ||
358 | lifetime_usec = SD_RADV_DEFAULT_DNS_LIFETIME_USEC; | |
359 | ||
360 | r = radv_get_ip6dns(link->network, &dns, &n_dns); | |
361 | if (r > 0) | |
362 | goto set_dns; | |
363 | ||
364 | if (uplink) { | |
349a981d PF |
365 | if (uplink->network == NULL) { |
366 | log_link_debug(uplink, "Cannot fetch DNS servers as uplink interface is not managed by us"); | |
367 | return 0; | |
368 | } | |
369 | ||
c555a358 PF |
370 | r = radv_get_ip6dns(uplink->network, &dns, &n_dns); |
371 | if (r > 0) | |
372 | goto set_dns; | |
373 | } | |
374 | ||
375 | return 0; | |
376 | ||
377 | set_dns: | |
378 | return sd_radv_set_rdnss(link->radv, | |
379 | DIV_ROUND_UP(lifetime_usec, USEC_PER_SEC), | |
380 | dns, n_dns); | |
381 | } | |
382 | ||
383 | static int radv_set_domains(Link *link, Link *uplink) { | |
384 | char **search_domains; | |
385 | usec_t lifetime_usec; | |
386 | ||
387 | if (!link->network->router_emit_domains) | |
388 | return 0; | |
389 | ||
390 | search_domains = link->network->router_search_domains; | |
391 | lifetime_usec = link->network->router_dns_lifetime_usec; | |
392 | ||
393 | if (search_domains) | |
394 | goto set_domains; | |
395 | ||
396 | lifetime_usec = SD_RADV_DEFAULT_DNS_LIFETIME_USEC; | |
397 | ||
398 | search_domains = link->network->search_domains; | |
399 | if (search_domains) | |
400 | goto set_domains; | |
401 | ||
402 | if (uplink) { | |
349a981d PF |
403 | if (uplink->network == NULL) { |
404 | log_link_debug(uplink, "Cannot fetch DNS search domains as uplink interface is not managed by us"); | |
405 | return 0; | |
406 | } | |
407 | ||
c555a358 PF |
408 | search_domains = uplink->network->search_domains; |
409 | if (search_domains) | |
410 | goto set_domains; | |
411 | } | |
412 | ||
413 | return 0; | |
414 | ||
415 | set_domains: | |
416 | return sd_radv_set_dnssl(link->radv, | |
417 | DIV_ROUND_UP(lifetime_usec, USEC_PER_SEC), | |
418 | search_domains); | |
419 | ||
420 | } | |
421 | ||
422 | int radv_emit_dns(Link *link) { | |
423 | Link *uplink; | |
424 | int r; | |
425 | ||
426 | uplink = manager_find_uplink(link->manager, link); | |
427 | ||
428 | r = radv_set_dns(link, uplink); | |
429 | if (r < 0) | |
430 | log_link_warning_errno(link, r, "Could not set RA DNS: %m"); | |
431 | ||
432 | r = radv_set_domains(link, uplink); | |
433 | if (r < 0) | |
434 | log_link_warning_errno(link, r, "Could not set RA Domains: %m"); | |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
091214b6 PF |
439 | int radv_configure(Link *link) { |
440 | int r; | |
441 | Prefix *p; | |
442 | ||
443 | assert(link); | |
444 | assert(link->network); | |
445 | ||
446 | r = sd_radv_new(&link->radv); | |
447 | if (r < 0) | |
448 | return r; | |
449 | ||
450 | r = sd_radv_attach_event(link->radv, NULL, 0); | |
451 | if (r < 0) | |
452 | return r; | |
453 | ||
454 | r = sd_radv_set_mac(link->radv, &link->mac); | |
455 | if (r < 0) | |
456 | return r; | |
457 | ||
458 | r = sd_radv_set_ifindex(link->radv, link->ifindex); | |
459 | if (r < 0) | |
460 | return r; | |
461 | ||
462 | r = sd_radv_set_managed_information(link->radv, link->network->router_managed); | |
463 | if (r < 0) | |
464 | return r; | |
465 | ||
466 | r = sd_radv_set_other_information(link->radv, link->network->router_other_information); | |
467 | if (r < 0) | |
468 | return r; | |
469 | ||
301a2fb9 PF |
470 | /* a value of 0xffffffff represents infinity, 0x0 means this host is |
471 | not a router */ | |
091214b6 | 472 | r = sd_radv_set_router_lifetime(link->radv, |
945e3225 | 473 | DIV_ROUND_UP(link->network->router_lifetime_usec, USEC_PER_SEC)); |
091214b6 PF |
474 | if (r < 0) |
475 | return r; | |
476 | ||
477 | if (link->network->router_lifetime_usec > 0) { | |
478 | r = sd_radv_set_preference(link->radv, | |
479 | link->network->router_preference); | |
480 | if (r < 0) | |
481 | return r; | |
482 | } | |
483 | ||
56a23cb4 PF |
484 | if (IN_SET(link->network->router_prefix_delegation, |
485 | RADV_PREFIX_DELEGATION_STATIC, | |
486 | RADV_PREFIX_DELEGATION_BOTH)) { | |
487 | LIST_FOREACH(prefixes, p, link->network->static_prefixes) { | |
d601b566 | 488 | r = sd_radv_add_prefix(link->radv, p->radv_prefix, false); |
56a23cb4 PF |
489 | if (r != -EEXIST && r < 0) |
490 | return r; | |
491 | } | |
091214b6 PF |
492 | } |
493 | ||
c555a358 | 494 | return radv_emit_dns(link); |
091214b6 | 495 | } |