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74b2466e LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2014 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
ad867662 LP |
22 | #include <netinet/tcp.h> |
23 | ||
46f08bea | 24 | #include "af-list.h" |
b5efdb8a | 25 | #include "alloc-util.h" |
4ad7f276 | 26 | #include "dns-domain.h" |
3ffd4af2 LP |
27 | #include "fd-util.h" |
28 | #include "hostname-util.h" | |
29 | #include "missing.h" | |
30 | #include "random-util.h" | |
74b2466e | 31 | #include "resolved-dns-scope.h" |
3ffd4af2 | 32 | #include "resolved-llmnr.h" |
b4f1862d | 33 | #include "resolved-mdns.h" |
3ffd4af2 LP |
34 | #include "socket-util.h" |
35 | #include "strv.h" | |
74b2466e | 36 | |
aea2429d LP |
37 | #define MULTICAST_RATELIMIT_INTERVAL_USEC (1*USEC_PER_SEC) |
38 | #define MULTICAST_RATELIMIT_BURST 1000 | |
39 | ||
9df3ba6c TG |
40 | /* After how much time to repeat LLMNR requests, see RFC 4795 Section 7 */ |
41 | #define MULTICAST_RESEND_TIMEOUT_MIN_USEC (100 * USEC_PER_MSEC) | |
42 | #define MULTICAST_RESEND_TIMEOUT_MAX_USEC (1 * USEC_PER_SEC) | |
43 | ||
0dd25fb9 | 44 | int dns_scope_new(Manager *m, DnsScope **ret, Link *l, DnsProtocol protocol, int family) { |
74b2466e LP |
45 | DnsScope *s; |
46 | ||
47 | assert(m); | |
48 | assert(ret); | |
49 | ||
50 | s = new0(DnsScope, 1); | |
51 | if (!s) | |
52 | return -ENOMEM; | |
53 | ||
54 | s->manager = m; | |
1716f6dc LP |
55 | s->link = l; |
56 | s->protocol = protocol; | |
57 | s->family = family; | |
9df3ba6c | 58 | s->resend_timeout = MULTICAST_RESEND_TIMEOUT_MIN_USEC; |
74b2466e LP |
59 | |
60 | LIST_PREPEND(scopes, m->dns_scopes, s); | |
61 | ||
1716f6dc | 62 | dns_scope_llmnr_membership(s, true); |
0db4c90a | 63 | dns_scope_mdns_membership(s, true); |
1716f6dc | 64 | |
46f08bea | 65 | log_debug("New scope on link %s, protocol %s, family %s", l ? l->name : "*", dns_protocol_to_string(protocol), family == AF_UNSPEC ? "*" : af_to_name(family)); |
1716f6dc | 66 | |
aea2429d LP |
67 | /* Enforce ratelimiting for the multicast protocols */ |
68 | RATELIMIT_INIT(s->ratelimit, MULTICAST_RATELIMIT_INTERVAL_USEC, MULTICAST_RATELIMIT_BURST); | |
69 | ||
74b2466e LP |
70 | *ret = s; |
71 | return 0; | |
72 | } | |
73 | ||
801ad6a6 | 74 | static void dns_scope_abort_transactions(DnsScope *s) { |
801ad6a6 | 75 | assert(s); |
1716f6dc | 76 | |
f9ebb22a LP |
77 | while (s->transactions) { |
78 | DnsTransaction *t = s->transactions; | |
79 | ||
faa133f3 LP |
80 | /* Abort the transaction, but make sure it is not |
81 | * freed while we still look at it */ | |
74b2466e | 82 | |
faa133f3 | 83 | t->block_gc++; |
f4e38037 LP |
84 | if (DNS_TRANSACTION_IS_LIVE(t->state)) |
85 | dns_transaction_complete(t, DNS_TRANSACTION_ABORTED); | |
faa133f3 | 86 | t->block_gc--; |
74b2466e | 87 | |
ec2c5e43 | 88 | dns_transaction_free(t); |
74b2466e | 89 | } |
801ad6a6 LP |
90 | } |
91 | ||
92 | DnsScope* dns_scope_free(DnsScope *s) { | |
93 | DnsResourceRecord *rr; | |
94 | ||
95 | if (!s) | |
96 | return NULL; | |
97 | ||
98 | log_debug("Removing scope on link %s, protocol %s, family %s", s->link ? s->link->name : "*", dns_protocol_to_string(s->protocol), s->family == AF_UNSPEC ? "*" : af_to_name(s->family)); | |
99 | ||
100 | dns_scope_llmnr_membership(s, false); | |
0db4c90a | 101 | dns_scope_mdns_membership(s, false); |
801ad6a6 LP |
102 | dns_scope_abort_transactions(s); |
103 | ||
104 | while (s->query_candidates) | |
105 | dns_query_candidate_free(s->query_candidates); | |
74b2466e | 106 | |
f9ebb22a | 107 | hashmap_free(s->transactions_by_key); |
da0c630e | 108 | |
1e43061b | 109 | while ((rr = ordered_hashmap_steal_first(s->conflict_queue))) |
a4076574 LP |
110 | dns_resource_record_unref(rr); |
111 | ||
1e43061b | 112 | ordered_hashmap_free(s->conflict_queue); |
a4076574 LP |
113 | sd_event_source_unref(s->conflict_event_source); |
114 | ||
322345fd | 115 | dns_cache_flush(&s->cache); |
623a4c97 | 116 | dns_zone_flush(&s->zone); |
322345fd | 117 | |
74b2466e | 118 | LIST_REMOVE(scopes, s->manager->dns_scopes, s); |
74b2466e LP |
119 | free(s); |
120 | ||
121 | return NULL; | |
122 | } | |
123 | ||
2c27fbca | 124 | DnsServer *dns_scope_get_dns_server(DnsScope *s) { |
74b2466e LP |
125 | assert(s); |
126 | ||
1716f6dc LP |
127 | if (s->protocol != DNS_PROTOCOL_DNS) |
128 | return NULL; | |
129 | ||
74b2466e LP |
130 | if (s->link) |
131 | return link_get_dns_server(s->link); | |
132 | else | |
133 | return manager_get_dns_server(s->manager); | |
134 | } | |
135 | ||
136 | void dns_scope_next_dns_server(DnsScope *s) { | |
137 | assert(s); | |
138 | ||
1716f6dc LP |
139 | if (s->protocol != DNS_PROTOCOL_DNS) |
140 | return; | |
141 | ||
74b2466e LP |
142 | if (s->link) |
143 | link_next_dns_server(s->link); | |
144 | else | |
145 | manager_next_dns_server(s->manager); | |
146 | } | |
147 | ||
9df3ba6c TG |
148 | void dns_scope_packet_received(DnsScope *s, usec_t rtt) { |
149 | assert(s); | |
150 | ||
84129d46 LP |
151 | if (rtt <= s->max_rtt) |
152 | return; | |
153 | ||
154 | s->max_rtt = rtt; | |
155 | s->resend_timeout = MIN(MAX(MULTICAST_RESEND_TIMEOUT_MIN_USEC, s->max_rtt * 2), MULTICAST_RESEND_TIMEOUT_MAX_USEC); | |
9df3ba6c TG |
156 | } |
157 | ||
158 | void dns_scope_packet_lost(DnsScope *s, usec_t usec) { | |
159 | assert(s); | |
160 | ||
161 | if (s->resend_timeout <= usec) | |
162 | s->resend_timeout = MIN(s->resend_timeout * 2, MULTICAST_RESEND_TIMEOUT_MAX_USEC); | |
163 | } | |
164 | ||
519ef046 | 165 | static int dns_scope_emit_one(DnsScope *s, int fd, DnsPacket *p) { |
1716f6dc LP |
166 | union in_addr_union addr; |
167 | int ifindex = 0, r; | |
0dd25fb9 | 168 | int family; |
1716f6dc | 169 | uint32_t mtu; |
74b2466e LP |
170 | |
171 | assert(s); | |
172 | assert(p); | |
1716f6dc | 173 | assert(p->protocol == s->protocol); |
ad867662 LP |
174 | |
175 | if (s->link) { | |
1716f6dc | 176 | mtu = s->link->mtu; |
74b2466e | 177 | ifindex = s->link->ifindex; |
1716f6dc | 178 | } else |
e1c95994 | 179 | mtu = manager_find_mtu(s->manager); |
74b2466e | 180 | |
106784eb | 181 | switch (s->protocol) { |
519ef046 | 182 | |
106784eb | 183 | case DNS_PROTOCOL_DNS: |
519ef046 | 184 | assert(fd >= 0); |
9c5e12a4 | 185 | |
623a4c97 | 186 | if (DNS_PACKET_QDCOUNT(p) > 1) |
15411c0c | 187 | return -EOPNOTSUPP; |
623a4c97 | 188 | |
1716f6dc LP |
189 | if (p->size > DNS_PACKET_UNICAST_SIZE_MAX) |
190 | return -EMSGSIZE; | |
191 | ||
a0166609 | 192 | if (p->size + UDP_PACKET_HEADER_SIZE > mtu) |
1716f6dc LP |
193 | return -EMSGSIZE; |
194 | ||
72290734 TG |
195 | r = manager_write(s->manager, fd, p); |
196 | if (r < 0) | |
197 | return r; | |
198 | ||
106784eb | 199 | break; |
1716f6dc | 200 | |
106784eb | 201 | case DNS_PROTOCOL_LLMNR: |
519ef046 LP |
202 | assert(fd < 0); |
203 | ||
1716f6dc | 204 | if (DNS_PACKET_QDCOUNT(p) > 1) |
15411c0c | 205 | return -EOPNOTSUPP; |
1716f6dc | 206 | |
aea2429d LP |
207 | if (!ratelimit_test(&s->ratelimit)) |
208 | return -EBUSY; | |
209 | ||
1716f6dc | 210 | family = s->family; |
1716f6dc LP |
211 | |
212 | if (family == AF_INET) { | |
213 | addr.in = LLMNR_MULTICAST_IPV4_ADDRESS; | |
1716f6dc LP |
214 | fd = manager_llmnr_ipv4_udp_fd(s->manager); |
215 | } else if (family == AF_INET6) { | |
216 | addr.in6 = LLMNR_MULTICAST_IPV6_ADDRESS; | |
217 | fd = manager_llmnr_ipv6_udp_fd(s->manager); | |
1716f6dc LP |
218 | } else |
219 | return -EAFNOSUPPORT; | |
220 | if (fd < 0) | |
221 | return fd; | |
72290734 | 222 | |
b4f1862d DM |
223 | r = manager_send(s->manager, fd, ifindex, family, &addr, LLMNR_PORT, p); |
224 | if (r < 0) | |
225 | return r; | |
226 | ||
227 | break; | |
228 | ||
229 | case DNS_PROTOCOL_MDNS: | |
519ef046 LP |
230 | assert(fd < 0); |
231 | ||
b4f1862d DM |
232 | if (!ratelimit_test(&s->ratelimit)) |
233 | return -EBUSY; | |
234 | ||
235 | family = s->family; | |
236 | ||
237 | if (family == AF_INET) { | |
238 | addr.in = MDNS_MULTICAST_IPV4_ADDRESS; | |
239 | fd = manager_mdns_ipv4_fd(s->manager); | |
240 | } else if (family == AF_INET6) { | |
241 | addr.in6 = MDNS_MULTICAST_IPV6_ADDRESS; | |
242 | fd = manager_mdns_ipv6_fd(s->manager); | |
243 | } else | |
244 | return -EAFNOSUPPORT; | |
245 | if (fd < 0) | |
246 | return fd; | |
247 | ||
248 | r = manager_send(s->manager, fd, ifindex, family, &addr, MDNS_PORT, p); | |
72290734 TG |
249 | if (r < 0) |
250 | return r; | |
106784eb DM |
251 | |
252 | break; | |
253 | ||
254 | default: | |
74b2466e | 255 | return -EAFNOSUPPORT; |
106784eb | 256 | } |
74b2466e | 257 | |
74b2466e LP |
258 | return 1; |
259 | } | |
260 | ||
519ef046 | 261 | int dns_scope_emit_udp(DnsScope *s, int fd, DnsPacket *p) { |
80a62095 DM |
262 | int r; |
263 | ||
264 | assert(s); | |
265 | assert(p); | |
266 | assert(p->protocol == s->protocol); | |
519ef046 | 267 | assert((s->protocol == DNS_PROTOCOL_DNS) == (fd >= 0)); |
80a62095 DM |
268 | |
269 | do { | |
270 | /* If there are multiple linked packets, set the TC bit in all but the last of them */ | |
271 | if (p->more) { | |
272 | assert(p->protocol == DNS_PROTOCOL_MDNS); | |
261f3673 | 273 | dns_packet_set_flags(p, true, true); |
80a62095 DM |
274 | } |
275 | ||
519ef046 | 276 | r = dns_scope_emit_one(s, fd, p); |
80a62095 DM |
277 | if (r < 0) |
278 | return r; | |
279 | ||
280 | p = p->more; | |
519ef046 | 281 | } while (p); |
80a62095 DM |
282 | |
283 | return 0; | |
284 | } | |
285 | ||
519ef046 LP |
286 | static int dns_scope_socket( |
287 | DnsScope *s, | |
288 | int type, | |
289 | int family, | |
290 | const union in_addr_union *address, | |
291 | DnsServer *server, | |
292 | uint16_t port) { | |
293 | ||
ad867662 LP |
294 | _cleanup_close_ int fd = -1; |
295 | union sockaddr_union sa = {}; | |
296 | socklen_t salen; | |
623a4c97 LP |
297 | static const int one = 1; |
298 | int ret, r; | |
ad867662 LP |
299 | |
300 | assert(s); | |
be808ea0 | 301 | |
519ef046 LP |
302 | if (server) { |
303 | assert(family == AF_UNSPEC); | |
304 | assert(!address); | |
be808ea0 | 305 | |
519ef046 LP |
306 | sa.sa.sa_family = server->family; |
307 | if (server->family == AF_INET) { | |
623a4c97 | 308 | sa.in.sin_port = htobe16(port); |
519ef046 | 309 | sa.in.sin_addr = server->address.in; |
623a4c97 | 310 | salen = sizeof(sa.in); |
519ef046 | 311 | } else if (server->family == AF_INET6) { |
623a4c97 | 312 | sa.in6.sin6_port = htobe16(port); |
519ef046 | 313 | sa.in6.sin6_addr = server->address.in6; |
623a4c97 LP |
314 | sa.in6.sin6_scope_id = s->link ? s->link->ifindex : 0; |
315 | salen = sizeof(sa.in6); | |
316 | } else | |
317 | return -EAFNOSUPPORT; | |
318 | } else { | |
519ef046 LP |
319 | assert(family != AF_UNSPEC); |
320 | assert(address); | |
321 | ||
623a4c97 LP |
322 | sa.sa.sa_family = family; |
323 | ||
324 | if (family == AF_INET) { | |
325 | sa.in.sin_port = htobe16(port); | |
326 | sa.in.sin_addr = address->in; | |
327 | salen = sizeof(sa.in); | |
328 | } else if (family == AF_INET6) { | |
329 | sa.in6.sin6_port = htobe16(port); | |
330 | sa.in6.sin6_addr = address->in6; | |
331 | sa.in6.sin6_scope_id = s->link ? s->link->ifindex : 0; | |
332 | salen = sizeof(sa.in6); | |
333 | } else | |
334 | return -EAFNOSUPPORT; | |
335 | } | |
ad867662 | 336 | |
0db64366 | 337 | fd = socket(sa.sa.sa_family, type|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); |
ad867662 LP |
338 | if (fd < 0) |
339 | return -errno; | |
340 | ||
0db64366 TG |
341 | if (type == SOCK_STREAM) { |
342 | r = setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &one, sizeof(one)); | |
343 | if (r < 0) | |
344 | return -errno; | |
345 | } | |
623a4c97 LP |
346 | |
347 | if (s->link) { | |
348 | uint32_t ifindex = htobe32(s->link->ifindex); | |
349 | ||
350 | if (sa.sa.sa_family == AF_INET) { | |
351 | r = setsockopt(fd, IPPROTO_IP, IP_UNICAST_IF, &ifindex, sizeof(ifindex)); | |
352 | if (r < 0) | |
353 | return -errno; | |
354 | } else if (sa.sa.sa_family == AF_INET6) { | |
355 | r = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_IF, &ifindex, sizeof(ifindex)); | |
356 | if (r < 0) | |
357 | return -errno; | |
358 | } | |
359 | } | |
360 | ||
361 | if (s->protocol == DNS_PROTOCOL_LLMNR) { | |
bf3f1271 | 362 | /* RFC 4795, section 2.5 requires the TTL to be set to 1 */ |
623a4c97 LP |
363 | |
364 | if (sa.sa.sa_family == AF_INET) { | |
365 | r = setsockopt(fd, IPPROTO_IP, IP_TTL, &one, sizeof(one)); | |
366 | if (r < 0) | |
367 | return -errno; | |
368 | } else if (sa.sa.sa_family == AF_INET6) { | |
369 | r = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &one, sizeof(one)); | |
370 | if (r < 0) | |
371 | return -errno; | |
372 | } | |
373 | } | |
ad867662 LP |
374 | |
375 | r = connect(fd, &sa.sa, salen); | |
376 | if (r < 0 && errno != EINPROGRESS) | |
377 | return -errno; | |
378 | ||
379 | ret = fd; | |
380 | fd = -1; | |
623a4c97 | 381 | |
ad867662 LP |
382 | return ret; |
383 | } | |
384 | ||
519ef046 LP |
385 | int dns_scope_socket_udp(DnsScope *s, DnsServer *server, uint16_t port) { |
386 | return dns_scope_socket(s, SOCK_DGRAM, AF_UNSPEC, NULL, server, port); | |
0db64366 TG |
387 | } |
388 | ||
519ef046 LP |
389 | int dns_scope_socket_tcp(DnsScope *s, int family, const union in_addr_union *address, DnsServer *server, uint16_t port) { |
390 | return dns_scope_socket(s, SOCK_STREAM, family, address, server, port); | |
0db64366 TG |
391 | } |
392 | ||
51323288 | 393 | DnsScopeMatch dns_scope_good_domain(DnsScope *s, int ifindex, uint64_t flags, const char *domain) { |
a51c1048 | 394 | DnsSearchDomain *d; |
74b2466e LP |
395 | |
396 | assert(s); | |
397 | assert(domain); | |
398 | ||
28b9b764 LP |
399 | /* Checks if the specified domain is something to look up on |
400 | * this scope. Note that this accepts non-qualified hostnames, | |
401 | * i.e. those without any search path prefixed yet. */ | |
402 | ||
51323288 LP |
403 | if (ifindex != 0 && (!s->link || s->link->ifindex != ifindex)) |
404 | return DNS_SCOPE_NO; | |
405 | ||
931851e8 | 406 | if ((SD_RESOLVED_FLAGS_MAKE(s->protocol, s->family, 0) & flags) == 0) |
51323288 LP |
407 | return DNS_SCOPE_NO; |
408 | ||
78c6a153 LP |
409 | /* Never resolve any loopback hostname or IP address via DNS, |
410 | * LLMNR or mDNS. Instead, always rely on synthesized RRs for | |
411 | * these. */ | |
412 | if (is_localhost(domain) || | |
413 | dns_name_endswith(domain, "127.in-addr.arpa") > 0 || | |
9436e8ca LP |
414 | dns_name_equal(domain, "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa") > 0) |
415 | return DNS_SCOPE_NO; | |
416 | ||
c9ad0edb LP |
417 | /* Never respond to some of the domains listed in RFC6303 */ |
418 | if (dns_name_endswith(domain, "0.in-addr.arpa") > 0 || | |
419 | dns_name_equal(domain, "255.255.255.255.in-addr.arpa") > 0 || | |
420 | dns_name_equal(domain, "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa") > 0) | |
421 | return DNS_SCOPE_NO; | |
422 | ||
7bcffc2e LP |
423 | /* Never respond to some of the domains listed in RFC6761 */ |
424 | if (dns_name_endswith(domain, "invalid") > 0) | |
425 | return DNS_SCOPE_NO; | |
426 | ||
801ad6a6 LP |
427 | /* Always honour search domains for routing queries. Note that |
428 | * we return DNS_SCOPE_YES here, rather than just | |
429 | * DNS_SCOPE_MAYBE, which means wildcard scopes won't be | |
430 | * considered anymore. */ | |
a51c1048 LP |
431 | LIST_FOREACH(domains, d, dns_scope_get_search_domains(s)) |
432 | if (dns_name_endswith(domain, d->name) > 0) | |
9b644bf9 LP |
433 | return DNS_SCOPE_YES; |
434 | ||
106784eb | 435 | switch (s->protocol) { |
801ad6a6 | 436 | |
dc477e73 | 437 | case DNS_PROTOCOL_DNS: |
801ad6a6 | 438 | |
28b9b764 LP |
439 | /* Exclude link-local IP ranges */ |
440 | if (dns_name_endswith(domain, "254.169.in-addr.arpa") == 0 && | |
c9ad0edb LP |
441 | dns_name_endswith(domain, "8.e.f.ip6.arpa") == 0 && |
442 | dns_name_endswith(domain, "9.e.f.ip6.arpa") == 0 && | |
443 | dns_name_endswith(domain, "a.e.f.ip6.arpa") == 0 && | |
b43d96b0 DM |
444 | dns_name_endswith(domain, "b.e.f.ip6.arpa") == 0 && |
445 | /* If networks use .local in their private setups, they are supposed to also add .local to their search | |
446 | * domains, which we already checked above. Otherwise, we consider .local specific to mDNS and won't | |
447 | * send such queries ordinary DNS servers. */ | |
448 | dns_name_endswith(domain, "local") == 0) | |
faa133f3 | 449 | return DNS_SCOPE_MAYBE; |
1716f6dc | 450 | |
faa133f3 | 451 | return DNS_SCOPE_NO; |
1716f6dc | 452 | |
106784eb | 453 | case DNS_PROTOCOL_MDNS: |
78c6a153 LP |
454 | if ((s->family == AF_INET && dns_name_endswith(domain, "in-addr.arpa") > 0) || |
455 | (s->family == AF_INET6 && dns_name_endswith(domain, "ip6.arpa") > 0) || | |
456 | (dns_name_endswith(domain, "local") > 0 && /* only resolve names ending in .local via mDNS */ | |
457 | dns_name_equal(domain, "local") == 0 && /* but not the single-label "local" name itself */ | |
458 | manager_is_own_hostname(s->manager, domain) <= 0)) /* never resolve the local hostname via mDNS */ | |
d8b7e75f | 459 | return DNS_SCOPE_MAYBE; |
74b2466e LP |
460 | |
461 | return DNS_SCOPE_NO; | |
74b2466e | 462 | |
106784eb | 463 | case DNS_PROTOCOL_LLMNR: |
78c6a153 LP |
464 | if ((s->family == AF_INET && dns_name_endswith(domain, "in-addr.arpa") > 0) || |
465 | (s->family == AF_INET6 && dns_name_endswith(domain, "ip6.arpa") > 0) || | |
dc477e73 | 466 | (dns_name_is_single_label(domain) && /* only resolve single label names via LLMNR */ |
78c6a153 LP |
467 | !is_gateway_hostname(domain) && /* don't resolve "gateway" with LLMNR, let nss-myhostname handle this */ |
468 | manager_is_own_hostname(s->manager, domain) <= 0)) /* never resolve the local hostname via LLMNR */ | |
1716f6dc | 469 | return DNS_SCOPE_MAYBE; |
74b2466e | 470 | |
1716f6dc | 471 | return DNS_SCOPE_NO; |
74b2466e | 472 | |
106784eb DM |
473 | default: |
474 | assert_not_reached("Unknown scope protocol"); | |
475 | } | |
1716f6dc LP |
476 | } |
477 | ||
478 | int dns_scope_good_key(DnsScope *s, DnsResourceKey *key) { | |
479 | assert(s); | |
480 | assert(key); | |
481 | ||
28b9b764 LP |
482 | /* Check if it makes sense to resolve the specified key on |
483 | * this scope. Note that this call assumes as fully qualified | |
484 | * name, i.e. the search suffixes already appended. */ | |
485 | ||
486 | if (s->protocol == DNS_PROTOCOL_DNS) { | |
487 | ||
e5abebab | 488 | /* On classic DNS, looking up non-address RRs is always |
28b9b764 LP |
489 | * fine. (Specifically, we want to permit looking up |
490 | * DNSKEY and DS records on the root and top-level | |
491 | * domains.) */ | |
492 | if (!dns_resource_key_is_address(key)) | |
493 | return true; | |
494 | ||
495 | /* However, we refuse to look up A and AAAA RRs on the | |
496 | * root and single-label domains, under the assumption | |
497 | * that those should be resolved via LLMNR or search | |
498 | * path only, and should not be leaked onto the | |
499 | * internet. */ | |
500 | return !(dns_name_is_single_label(DNS_RESOURCE_KEY_NAME(key)) || | |
501 | dns_name_is_root(DNS_RESOURCE_KEY_NAME(key))); | |
502 | } | |
1716f6dc LP |
503 | |
504 | /* On mDNS and LLMNR, send A and AAAA queries only on the | |
505 | * respective scopes */ | |
506 | ||
507 | if (s->family == AF_INET && key->class == DNS_CLASS_IN && key->type == DNS_TYPE_AAAA) | |
508 | return false; | |
509 | ||
510 | if (s->family == AF_INET6 && key->class == DNS_CLASS_IN && key->type == DNS_TYPE_A) | |
511 | return false; | |
512 | ||
513 | return true; | |
514 | } | |
515 | ||
0db4c90a | 516 | static int dns_scope_multicast_membership(DnsScope *s, bool b, struct in_addr in, struct in6_addr in6) { |
1716f6dc LP |
517 | int fd; |
518 | ||
5ba73e9b | 519 | assert(s); |
5ba73e9b LP |
520 | assert(s->link); |
521 | ||
1716f6dc LP |
522 | if (s->family == AF_INET) { |
523 | struct ip_mreqn mreqn = { | |
0db4c90a | 524 | .imr_multiaddr = in, |
1716f6dc LP |
525 | .imr_ifindex = s->link->ifindex, |
526 | }; | |
527 | ||
528 | fd = manager_llmnr_ipv4_udp_fd(s->manager); | |
529 | if (fd < 0) | |
530 | return fd; | |
531 | ||
7b4c2ee7 LP |
532 | /* Always first try to drop membership before we add |
533 | * one. This is necessary on some devices, such as | |
534 | * veth. */ | |
535 | if (b) | |
dc751688 | 536 | (void) setsockopt(fd, IPPROTO_IP, IP_DROP_MEMBERSHIP, &mreqn, sizeof(mreqn)); |
7b4c2ee7 | 537 | |
1716f6dc LP |
538 | if (setsockopt(fd, IPPROTO_IP, b ? IP_ADD_MEMBERSHIP : IP_DROP_MEMBERSHIP, &mreqn, sizeof(mreqn)) < 0) |
539 | return -errno; | |
540 | ||
541 | } else if (s->family == AF_INET6) { | |
542 | struct ipv6_mreq mreq = { | |
0db4c90a | 543 | .ipv6mr_multiaddr = in6, |
1716f6dc LP |
544 | .ipv6mr_interface = s->link->ifindex, |
545 | }; | |
546 | ||
547 | fd = manager_llmnr_ipv6_udp_fd(s->manager); | |
548 | if (fd < 0) | |
549 | return fd; | |
550 | ||
7b4c2ee7 | 551 | if (b) |
dc751688 | 552 | (void) setsockopt(fd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq, sizeof(mreq)); |
7b4c2ee7 | 553 | |
1716f6dc LP |
554 | if (setsockopt(fd, IPPROTO_IPV6, b ? IPV6_ADD_MEMBERSHIP : IPV6_DROP_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) |
555 | return -errno; | |
556 | } else | |
557 | return -EAFNOSUPPORT; | |
558 | ||
559 | return 0; | |
74b2466e | 560 | } |
623a4c97 | 561 | |
0db4c90a DM |
562 | int dns_scope_llmnr_membership(DnsScope *s, bool b) { |
563 | ||
564 | if (s->protocol != DNS_PROTOCOL_LLMNR) | |
565 | return 0; | |
566 | ||
567 | return dns_scope_multicast_membership(s, b, LLMNR_MULTICAST_IPV4_ADDRESS, LLMNR_MULTICAST_IPV6_ADDRESS); | |
568 | } | |
569 | ||
570 | int dns_scope_mdns_membership(DnsScope *s, bool b) { | |
571 | ||
572 | if (s->protocol != DNS_PROTOCOL_MDNS) | |
573 | return 0; | |
574 | ||
575 | return dns_scope_multicast_membership(s, b, MDNS_MULTICAST_IPV4_ADDRESS, MDNS_MULTICAST_IPV6_ADDRESS); | |
576 | } | |
577 | ||
ec2c5e43 LP |
578 | static int dns_scope_make_reply_packet( |
579 | DnsScope *s, | |
580 | uint16_t id, | |
581 | int rcode, | |
582 | DnsQuestion *q, | |
583 | DnsAnswer *answer, | |
584 | DnsAnswer *soa, | |
585 | bool tentative, | |
586 | DnsPacket **ret) { | |
587 | ||
623a4c97 LP |
588 | _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL; |
589 | unsigned i; | |
590 | int r; | |
591 | ||
592 | assert(s); | |
a4076574 | 593 | assert(ret); |
623a4c97 | 594 | |
75cd513e TA |
595 | if ((!q || q->n_keys <= 0) |
596 | && (!answer || answer->n_rrs <= 0) | |
597 | && (!soa || soa->n_rrs <= 0)) | |
623a4c97 LP |
598 | return -EINVAL; |
599 | ||
600 | r = dns_packet_new(&p, s->protocol, 0); | |
601 | if (r < 0) | |
602 | return r; | |
603 | ||
604 | DNS_PACKET_HEADER(p)->id = id; | |
ea917db9 LP |
605 | DNS_PACKET_HEADER(p)->flags = htobe16(DNS_PACKET_MAKE_FLAGS( |
606 | 1 /* qr */, | |
607 | 0 /* opcode */, | |
608 | 0 /* c */, | |
609 | 0 /* tc */, | |
ec2c5e43 | 610 | tentative, |
ea917db9 LP |
611 | 0 /* (ra) */, |
612 | 0 /* (ad) */, | |
613 | 0 /* (cd) */, | |
614 | rcode)); | |
623a4c97 LP |
615 | |
616 | if (q) { | |
617 | for (i = 0; i < q->n_keys; i++) { | |
618 | r = dns_packet_append_key(p, q->keys[i], NULL); | |
619 | if (r < 0) | |
620 | return r; | |
621 | } | |
622 | ||
623 | DNS_PACKET_HEADER(p)->qdcount = htobe16(q->n_keys); | |
624 | } | |
625 | ||
8bf52d3d LP |
626 | if (answer) { |
627 | for (i = 0; i < answer->n_rrs; i++) { | |
a8812dd7 | 628 | r = dns_packet_append_rr(p, answer->items[i].rr, NULL, NULL); |
623a4c97 LP |
629 | if (r < 0) |
630 | return r; | |
631 | } | |
632 | ||
8bf52d3d LP |
633 | DNS_PACKET_HEADER(p)->ancount = htobe16(answer->n_rrs); |
634 | } | |
635 | ||
636 | if (soa) { | |
637 | for (i = 0; i < soa->n_rrs; i++) { | |
a8812dd7 | 638 | r = dns_packet_append_rr(p, soa->items[i].rr, NULL, NULL); |
8bf52d3d LP |
639 | if (r < 0) |
640 | return r; | |
641 | } | |
642 | ||
643 | DNS_PACKET_HEADER(p)->arcount = htobe16(soa->n_rrs); | |
623a4c97 LP |
644 | } |
645 | ||
646 | *ret = p; | |
647 | p = NULL; | |
648 | ||
649 | return 0; | |
650 | } | |
651 | ||
a4076574 LP |
652 | static void dns_scope_verify_conflicts(DnsScope *s, DnsPacket *p) { |
653 | unsigned n; | |
654 | ||
655 | assert(s); | |
656 | assert(p); | |
657 | ||
658 | if (p->question) | |
659 | for (n = 0; n < p->question->n_keys; n++) | |
660 | dns_zone_verify_conflicts(&s->zone, p->question->keys[n]); | |
661 | if (p->answer) | |
662 | for (n = 0; n < p->answer->n_rrs; n++) | |
78c6a153 | 663 | dns_zone_verify_conflicts(&s->zone, p->answer->items[n].rr->key); |
a4076574 LP |
664 | } |
665 | ||
623a4c97 LP |
666 | void dns_scope_process_query(DnsScope *s, DnsStream *stream, DnsPacket *p) { |
667 | _cleanup_(dns_packet_unrefp) DnsPacket *reply = NULL; | |
8bf52d3d | 668 | _cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL, *soa = NULL; |
5032b16d | 669 | DnsResourceKey *key = NULL; |
ec2c5e43 | 670 | bool tentative = false; |
623a4c97 LP |
671 | int r, fd; |
672 | ||
673 | assert(s); | |
674 | assert(p); | |
675 | ||
676 | if (p->protocol != DNS_PROTOCOL_LLMNR) | |
677 | return; | |
678 | ||
2442b93d LP |
679 | if (p->ipproto == IPPROTO_UDP) { |
680 | /* Don't accept UDP queries directed to anything but | |
681 | * the LLMNR multicast addresses. See RFC 4795, | |
d076c6f9 | 682 | * section 2.5. */ |
2442b93d LP |
683 | |
684 | if (p->family == AF_INET && !in_addr_equal(AF_INET, &p->destination, (union in_addr_union*) &LLMNR_MULTICAST_IPV4_ADDRESS)) | |
685 | return; | |
686 | ||
687 | if (p->family == AF_INET6 && !in_addr_equal(AF_INET6, &p->destination, (union in_addr_union*) &LLMNR_MULTICAST_IPV6_ADDRESS)) | |
688 | return; | |
689 | } | |
690 | ||
623a4c97 LP |
691 | r = dns_packet_extract(p); |
692 | if (r < 0) { | |
da927ba9 | 693 | log_debug_errno(r, "Failed to extract resources from incoming packet: %m"); |
623a4c97 LP |
694 | return; |
695 | } | |
696 | ||
8b757a38 | 697 | if (DNS_PACKET_LLMNR_C(p)) { |
a4076574 LP |
698 | /* Somebody notified us about a possible conflict */ |
699 | dns_scope_verify_conflicts(s, p); | |
ea917db9 LP |
700 | return; |
701 | } | |
702 | ||
5032b16d LP |
703 | assert(p->question->n_keys == 1); |
704 | key = p->question->keys[0]; | |
705 | ||
706 | r = dns_zone_lookup(&s->zone, key, &answer, &soa, &tentative); | |
623a4c97 | 707 | if (r < 0) { |
da927ba9 | 708 | log_debug_errno(r, "Failed to lookup key: %m"); |
623a4c97 LP |
709 | return; |
710 | } | |
711 | if (r == 0) | |
712 | return; | |
713 | ||
fcf57f9c LP |
714 | if (answer) |
715 | dns_answer_order_by_scope(answer, in_addr_is_link_local(p->family, &p->sender) > 0); | |
af93291c | 716 | |
ec2c5e43 | 717 | r = dns_scope_make_reply_packet(s, DNS_PACKET_ID(p), DNS_RCODE_SUCCESS, p->question, answer, soa, tentative, &reply); |
623a4c97 | 718 | if (r < 0) { |
da927ba9 | 719 | log_debug_errno(r, "Failed to build reply packet: %m"); |
623a4c97 LP |
720 | return; |
721 | } | |
722 | ||
723 | if (stream) | |
724 | r = dns_stream_write_packet(stream, reply); | |
725 | else { | |
aea2429d LP |
726 | if (!ratelimit_test(&s->ratelimit)) |
727 | return; | |
728 | ||
623a4c97 LP |
729 | if (p->family == AF_INET) |
730 | fd = manager_llmnr_ipv4_udp_fd(s->manager); | |
731 | else if (p->family == AF_INET6) | |
732 | fd = manager_llmnr_ipv6_udp_fd(s->manager); | |
733 | else { | |
734 | log_debug("Unknown protocol"); | |
735 | return; | |
736 | } | |
737 | if (fd < 0) { | |
da927ba9 | 738 | log_debug_errno(fd, "Failed to get reply socket: %m"); |
623a4c97 LP |
739 | return; |
740 | } | |
741 | ||
6e068472 LP |
742 | /* Note that we always immediately reply to all LLMNR |
743 | * requests, and do not wait any time, since we | |
744 | * verified uniqueness for all records. Also see RFC | |
745 | * 4795, Section 2.7 */ | |
746 | ||
623a4c97 LP |
747 | r = manager_send(s->manager, fd, p->ifindex, p->family, &p->sender, p->sender_port, reply); |
748 | } | |
749 | ||
750 | if (r < 0) { | |
da927ba9 | 751 | log_debug_errno(r, "Failed to send reply packet: %m"); |
623a4c97 LP |
752 | return; |
753 | } | |
754 | } | |
ec2c5e43 | 755 | |
f52e61da | 756 | DnsTransaction *dns_scope_find_transaction(DnsScope *scope, DnsResourceKey *key, bool cache_ok) { |
ec2c5e43 LP |
757 | DnsTransaction *t; |
758 | ||
759 | assert(scope); | |
f52e61da | 760 | assert(key); |
ec2c5e43 | 761 | |
da0c630e LP |
762 | /* Try to find an ongoing transaction that is a equal to the |
763 | * specified question */ | |
f9ebb22a | 764 | t = hashmap_get(scope->transactions_by_key, key); |
da0c630e LP |
765 | if (!t) |
766 | return NULL; | |
dc4d47e2 | 767 | |
da0c630e LP |
768 | /* Refuse reusing transactions that completed based on cached |
769 | * data instead of a real packet, if that's requested. */ | |
770 | if (!cache_ok && | |
3bbdc31d | 771 | IN_SET(t->state, DNS_TRANSACTION_SUCCESS, DNS_TRANSACTION_RCODE_FAILURE) && |
c3bc53e6 | 772 | t->answer_source != DNS_TRANSACTION_NETWORK) |
da0c630e | 773 | return NULL; |
ec2c5e43 | 774 | |
da0c630e | 775 | return t; |
ec2c5e43 | 776 | } |
a4076574 LP |
777 | |
778 | static int dns_scope_make_conflict_packet( | |
779 | DnsScope *s, | |
780 | DnsResourceRecord *rr, | |
781 | DnsPacket **ret) { | |
782 | ||
783 | _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL; | |
784 | int r; | |
785 | ||
786 | assert(s); | |
787 | assert(rr); | |
788 | assert(ret); | |
789 | ||
790 | r = dns_packet_new(&p, s->protocol, 0); | |
791 | if (r < 0) | |
792 | return r; | |
793 | ||
794 | DNS_PACKET_HEADER(p)->flags = htobe16(DNS_PACKET_MAKE_FLAGS( | |
795 | 0 /* qr */, | |
796 | 0 /* opcode */, | |
797 | 1 /* conflict */, | |
798 | 0 /* tc */, | |
799 | 0 /* t */, | |
800 | 0 /* (ra) */, | |
801 | 0 /* (ad) */, | |
802 | 0 /* (cd) */, | |
803 | 0)); | |
fe2dfc8b DM |
804 | |
805 | /* For mDNS, the transaction ID should always be 0 */ | |
806 | if (s->protocol != DNS_PROTOCOL_MDNS) | |
807 | random_bytes(&DNS_PACKET_HEADER(p)->id, sizeof(uint16_t)); | |
808 | ||
a4076574 LP |
809 | DNS_PACKET_HEADER(p)->qdcount = htobe16(1); |
810 | DNS_PACKET_HEADER(p)->arcount = htobe16(1); | |
811 | ||
812 | r = dns_packet_append_key(p, rr->key, NULL); | |
813 | if (r < 0) | |
814 | return r; | |
815 | ||
a8812dd7 | 816 | r = dns_packet_append_rr(p, rr, NULL, NULL); |
a4076574 LP |
817 | if (r < 0) |
818 | return r; | |
819 | ||
820 | *ret = p; | |
821 | p = NULL; | |
822 | ||
823 | return 0; | |
824 | } | |
825 | ||
826 | static int on_conflict_dispatch(sd_event_source *es, usec_t usec, void *userdata) { | |
827 | DnsScope *scope = userdata; | |
828 | int r; | |
829 | ||
830 | assert(es); | |
831 | assert(scope); | |
832 | ||
833 | scope->conflict_event_source = sd_event_source_unref(scope->conflict_event_source); | |
834 | ||
835 | for (;;) { | |
836 | _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL; | |
837 | _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL; | |
838 | ||
1e43061b | 839 | rr = ordered_hashmap_steal_first(scope->conflict_queue); |
a4076574 LP |
840 | if (!rr) |
841 | break; | |
842 | ||
843 | r = dns_scope_make_conflict_packet(scope, rr, &p); | |
844 | if (r < 0) { | |
da927ba9 | 845 | log_error_errno(r, "Failed to make conflict packet: %m"); |
a4076574 LP |
846 | return 0; |
847 | } | |
848 | ||
519ef046 | 849 | r = dns_scope_emit_udp(scope, -1, p); |
a4076574 | 850 | if (r < 0) |
da927ba9 | 851 | log_debug_errno(r, "Failed to send conflict packet: %m"); |
a4076574 LP |
852 | } |
853 | ||
854 | return 0; | |
855 | } | |
856 | ||
857 | int dns_scope_notify_conflict(DnsScope *scope, DnsResourceRecord *rr) { | |
858 | usec_t jitter; | |
859 | int r; | |
860 | ||
861 | assert(scope); | |
862 | assert(rr); | |
863 | ||
864 | /* We don't send these queries immediately. Instead, we queue | |
865 | * them, and send them after some jitter delay. */ | |
1e43061b | 866 | r = ordered_hashmap_ensure_allocated(&scope->conflict_queue, &dns_resource_key_hash_ops); |
a4076574 LP |
867 | if (r < 0) { |
868 | log_oom(); | |
869 | return r; | |
870 | } | |
871 | ||
872 | /* We only place one RR per key in the conflict | |
873 | * messages, not all of them. That should be enough to | |
874 | * indicate where there might be a conflict */ | |
1e43061b | 875 | r = ordered_hashmap_put(scope->conflict_queue, rr->key, rr); |
a4076574 LP |
876 | if (r == -EEXIST || r == 0) |
877 | return 0; | |
f647962d MS |
878 | if (r < 0) |
879 | return log_debug_errno(r, "Failed to queue conflicting RR: %m"); | |
a4076574 LP |
880 | |
881 | dns_resource_record_ref(rr); | |
882 | ||
883 | if (scope->conflict_event_source) | |
884 | return 0; | |
885 | ||
886 | random_bytes(&jitter, sizeof(jitter)); | |
887 | jitter %= LLMNR_JITTER_INTERVAL_USEC; | |
888 | ||
889 | r = sd_event_add_time(scope->manager->event, | |
890 | &scope->conflict_event_source, | |
891 | clock_boottime_or_monotonic(), | |
892 | now(clock_boottime_or_monotonic()) + jitter, | |
893 | LLMNR_JITTER_INTERVAL_USEC, | |
894 | on_conflict_dispatch, scope); | |
f647962d MS |
895 | if (r < 0) |
896 | return log_debug_errno(r, "Failed to add conflict dispatch event: %m"); | |
a4076574 LP |
897 | |
898 | return 0; | |
899 | } | |
900 | ||
901 | void dns_scope_check_conflicts(DnsScope *scope, DnsPacket *p) { | |
902 | unsigned i; | |
903 | int r; | |
904 | ||
905 | assert(scope); | |
906 | assert(p); | |
907 | ||
908 | if (p->protocol != DNS_PROTOCOL_LLMNR) | |
909 | return; | |
910 | ||
911 | if (DNS_PACKET_RRCOUNT(p) <= 0) | |
912 | return; | |
913 | ||
8b757a38 | 914 | if (DNS_PACKET_LLMNR_C(p) != 0) |
a4076574 LP |
915 | return; |
916 | ||
8b757a38 | 917 | if (DNS_PACKET_LLMNR_T(p) != 0) |
a4076574 LP |
918 | return; |
919 | ||
920 | if (manager_our_packet(scope->manager, p)) | |
921 | return; | |
922 | ||
923 | r = dns_packet_extract(p); | |
924 | if (r < 0) { | |
da927ba9 | 925 | log_debug_errno(r, "Failed to extract packet: %m"); |
a4076574 LP |
926 | return; |
927 | } | |
928 | ||
929 | log_debug("Checking for conflicts..."); | |
930 | ||
931 | for (i = 0; i < p->answer->n_rrs; i++) { | |
932 | ||
933 | /* Check for conflicts against the local zone. If we | |
934 | * found one, we won't check any further */ | |
78c6a153 | 935 | r = dns_zone_check_conflicts(&scope->zone, p->answer->items[i].rr); |
a4076574 LP |
936 | if (r != 0) |
937 | continue; | |
938 | ||
939 | /* Check for conflicts against the local cache. If so, | |
940 | * send out an advisory query, to inform everybody */ | |
78c6a153 | 941 | r = dns_cache_check_conflicts(&scope->cache, p->answer->items[i].rr, p->family, &p->sender); |
a4076574 LP |
942 | if (r <= 0) |
943 | continue; | |
944 | ||
78c6a153 | 945 | dns_scope_notify_conflict(scope, p->answer->items[i].rr); |
a4076574 LP |
946 | } |
947 | } | |
4d506d6b LP |
948 | |
949 | void dns_scope_dump(DnsScope *s, FILE *f) { | |
950 | assert(s); | |
951 | ||
952 | if (!f) | |
953 | f = stdout; | |
954 | ||
955 | fputs("[Scope protocol=", f); | |
956 | fputs(dns_protocol_to_string(s->protocol), f); | |
957 | ||
958 | if (s->link) { | |
959 | fputs(" interface=", f); | |
960 | fputs(s->link->name, f); | |
961 | } | |
962 | ||
963 | if (s->family != AF_UNSPEC) { | |
964 | fputs(" family=", f); | |
965 | fputs(af_to_name(s->family), f); | |
966 | } | |
967 | ||
968 | fputs("]\n", f); | |
969 | ||
970 | if (!dns_zone_is_empty(&s->zone)) { | |
971 | fputs("ZONE:\n", f); | |
972 | dns_zone_dump(&s->zone, f); | |
973 | } | |
974 | ||
975 | if (!dns_cache_is_empty(&s->cache)) { | |
976 | fputs("CACHE:\n", f); | |
977 | dns_cache_dump(&s->cache, f); | |
978 | } | |
979 | } | |
a51c1048 LP |
980 | |
981 | DnsSearchDomain *dns_scope_get_search_domains(DnsScope *s) { | |
801ad6a6 LP |
982 | assert(s); |
983 | ||
a51c1048 LP |
984 | if (s->protocol != DNS_PROTOCOL_DNS) |
985 | return NULL; | |
986 | ||
987 | if (s->link) | |
988 | return s->link->search_domains; | |
989 | ||
28b9b764 | 990 | return s->manager->search_domains; |
801ad6a6 LP |
991 | } |
992 | ||
dc477e73 | 993 | bool dns_scope_name_needs_search_domain(DnsScope *s, const char *name) { |
801ad6a6 LP |
994 | assert(s); |
995 | ||
996 | if (s->protocol != DNS_PROTOCOL_DNS) | |
dc477e73 | 997 | return false; |
801ad6a6 | 998 | |
dc477e73 | 999 | return dns_name_is_single_label(name); |
801ad6a6 | 1000 | } |