2 This file is part of systemd.
4 Copyright 2014 Tom Gundersen <teg@jklm.no>
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20 #include <netinet/in.h>
22 #include <sys/ioctl.h>
25 #include "alloc-util.h"
26 #include "dns-domain.h"
28 #include "fileio-label.h"
29 #include "hostname-util.h"
31 #include "netlink-util.h"
32 #include "network-internal.h"
33 #include "ordered-set.h"
34 #include "parse-util.h"
35 #include "random-util.h"
36 #include "resolved-bus.h"
37 #include "resolved-conf.h"
38 #include "resolved-etc-hosts.h"
39 #include "resolved-llmnr.h"
40 #include "resolved-manager.h"
41 #include "resolved-mdns.h"
42 #include "resolved-resolv-conf.h"
43 #include "socket-util.h"
44 #include "string-table.h"
45 #include "string-util.h"
48 #define SEND_TIMEOUT_USEC (200 * USEC_PER_MSEC)
50 static int manager_process_link(sd_netlink
*rtnl
, sd_netlink_message
*mm
, void *userdata
) {
51 Manager
*m
= userdata
;
60 r
= sd_netlink_message_get_type(mm
, &type
);
64 r
= sd_rtnl_message_link_get_ifindex(mm
, &ifindex
);
68 l
= hashmap_get(m
->links
, INT_TO_PTR(ifindex
));
76 r
= link_new(m
, &l
, ifindex
);
81 r
= link_update_rtnl(l
, mm
);
85 r
= link_update_monitor(l
);
90 log_debug("Found new link %i/%s", ifindex
, l
->name
);
97 log_debug("Removing link %i/%s", l
->ifindex
, l
->name
);
107 log_warning_errno(r
, "Failed to process RTNL link message: %m");
111 static int manager_process_address(sd_netlink
*rtnl
, sd_netlink_message
*mm
, void *userdata
) {
112 Manager
*m
= userdata
;
113 union in_addr_union address
;
115 int r
, ifindex
, family
;
123 r
= sd_netlink_message_get_type(mm
, &type
);
127 r
= sd_rtnl_message_addr_get_ifindex(mm
, &ifindex
);
131 l
= hashmap_get(m
->links
, INT_TO_PTR(ifindex
));
135 r
= sd_rtnl_message_addr_get_family(mm
, &family
);
142 r
= sd_netlink_message_read_in_addr(mm
, IFA_LOCAL
, &address
.in
);
144 r
= sd_netlink_message_read_in_addr(mm
, IFA_ADDRESS
, &address
.in
);
152 r
= sd_netlink_message_read_in6_addr(mm
, IFA_LOCAL
, &address
.in6
);
154 r
= sd_netlink_message_read_in6_addr(mm
, IFA_ADDRESS
, &address
.in6
);
165 a
= link_find_address(l
, family
, &address
);
172 r
= link_address_new(l
, &a
, family
, &address
);
177 r
= link_address_update_rtnl(a
, mm
);
184 link_address_free(a
);
191 log_warning_errno(r
, "Failed to process RTNL address message: %m");
195 static int manager_rtnl_listen(Manager
*m
) {
196 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
, *reply
= NULL
;
197 sd_netlink_message
*i
;
202 /* First, subscribe to interfaces coming and going */
203 r
= sd_netlink_open(&m
->rtnl
);
207 r
= sd_netlink_attach_event(m
->rtnl
, m
->event
, SD_EVENT_PRIORITY_IMPORTANT
);
211 r
= sd_netlink_add_match(m
->rtnl
, RTM_NEWLINK
, manager_process_link
, m
);
215 r
= sd_netlink_add_match(m
->rtnl
, RTM_DELLINK
, manager_process_link
, m
);
219 r
= sd_netlink_add_match(m
->rtnl
, RTM_NEWADDR
, manager_process_address
, m
);
223 r
= sd_netlink_add_match(m
->rtnl
, RTM_DELADDR
, manager_process_address
, m
);
227 /* Then, enumerate all links */
228 r
= sd_rtnl_message_new_link(m
->rtnl
, &req
, RTM_GETLINK
, 0);
232 r
= sd_netlink_message_request_dump(req
, true);
236 r
= sd_netlink_call(m
->rtnl
, req
, 0, &reply
);
240 for (i
= reply
; i
; i
= sd_netlink_message_next(i
)) {
241 r
= manager_process_link(m
->rtnl
, i
, m
);
246 req
= sd_netlink_message_unref(req
);
247 reply
= sd_netlink_message_unref(reply
);
249 /* Finally, enumerate all addresses, too */
250 r
= sd_rtnl_message_new_addr(m
->rtnl
, &req
, RTM_GETADDR
, 0, AF_UNSPEC
);
254 r
= sd_netlink_message_request_dump(req
, true);
258 r
= sd_netlink_call(m
->rtnl
, req
, 0, &reply
);
262 for (i
= reply
; i
; i
= sd_netlink_message_next(i
)) {
263 r
= manager_process_address(m
->rtnl
, i
, m
);
271 static int on_network_event(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
272 Manager
*m
= userdata
;
279 sd_network_monitor_flush(m
->network_monitor
);
281 HASHMAP_FOREACH(l
, m
->links
, i
) {
282 r
= link_update_monitor(l
);
284 log_warning_errno(r
, "Failed to update monitor information for %i: %m", l
->ifindex
);
287 (void) manager_write_resolv_conf(m
);
292 static int manager_network_monitor_listen(Manager
*m
) {
297 r
= sd_network_monitor_new(&m
->network_monitor
, NULL
);
301 fd
= sd_network_monitor_get_fd(m
->network_monitor
);
305 events
= sd_network_monitor_get_events(m
->network_monitor
);
309 r
= sd_event_add_io(m
->event
, &m
->network_event_source
, fd
, events
, &on_network_event
, m
);
313 r
= sd_event_source_set_priority(m
->network_event_source
, SD_EVENT_PRIORITY_IMPORTANT
+5);
317 (void) sd_event_source_set_description(m
->network_event_source
, "network-monitor");
322 static int determine_hostname(char **llmnr_hostname
, char **mdns_hostname
) {
323 _cleanup_free_
char *h
= NULL
, *n
= NULL
;
324 char label
[DNS_LABEL_MAX
];
328 assert(llmnr_hostname
);
329 assert(mdns_hostname
);
331 /* Extract and normalize the first label of the locally
332 * configured hostname, and check it's not "localhost". */
334 h
= gethostname_malloc();
339 r
= dns_label_unescape(&p
, label
, sizeof(label
));
341 return log_error_errno(r
, "Failed to unescape host name: %m");
343 log_error("Couldn't find a single label in hosntame.");
347 k
= dns_label_undo_idna(label
, r
, label
, sizeof(label
));
349 return log_error_errno(k
, "Failed to undo IDNA: %m");
353 if (!utf8_is_valid(label
)) {
354 log_error("System hostname is not UTF-8 clean.");
358 r
= dns_label_escape_new(label
, r
, &n
);
360 return log_error_errno(r
, "Failed to escape host name: %m");
362 if (is_localhost(n
)) {
363 log_debug("System hostname is 'localhost', ignoring.");
367 r
= dns_name_concat(n
, "local", mdns_hostname
);
369 return log_error_errno(r
, "Failed to determine mDNS hostname: %m");
377 static int on_hostname_change(sd_event_source
*es
, int fd
, uint32_t revents
, void *userdata
) {
378 _cleanup_free_
char *llmnr_hostname
= NULL
, *mdns_hostname
= NULL
;
379 Manager
*m
= userdata
;
384 r
= determine_hostname(&llmnr_hostname
, &mdns_hostname
);
386 return 0; /* ignore invalid hostnames */
388 if (streq(llmnr_hostname
, m
->llmnr_hostname
) && streq(mdns_hostname
, m
->mdns_hostname
))
391 log_info("System hostname changed to '%s'.", llmnr_hostname
);
393 free(m
->llmnr_hostname
);
394 free(m
->mdns_hostname
);
396 m
->llmnr_hostname
= llmnr_hostname
;
397 m
->mdns_hostname
= mdns_hostname
;
399 llmnr_hostname
= mdns_hostname
= NULL
;
401 manager_refresh_rrs(m
);
406 static int manager_watch_hostname(Manager
*m
) {
411 m
->hostname_fd
= open("/proc/sys/kernel/hostname", O_RDONLY
|O_CLOEXEC
|O_NDELAY
|O_NOCTTY
);
412 if (m
->hostname_fd
< 0) {
413 log_warning_errno(errno
, "Failed to watch hostname: %m");
417 r
= sd_event_add_io(m
->event
, &m
->hostname_event_source
, m
->hostname_fd
, 0, on_hostname_change
, m
);
420 /* kernels prior to 3.2 don't support polling this file. Ignore the failure. */
421 m
->hostname_fd
= safe_close(m
->hostname_fd
);
423 return log_error_errno(r
, "Failed to add hostname event source: %m");
426 (void) sd_event_source_set_description(m
->hostname_event_source
, "hostname");
428 r
= determine_hostname(&m
->llmnr_hostname
, &m
->mdns_hostname
);
430 log_info("Defaulting to hostname 'linux'.");
431 m
->llmnr_hostname
= strdup("linux");
432 if (!m
->llmnr_hostname
)
435 m
->mdns_hostname
= strdup("linux.local");
436 if (!m
->mdns_hostname
)
439 log_info("Using system hostname '%s'.", m
->llmnr_hostname
);
444 static int manager_sigusr1(sd_event_source
*s
, const struct signalfd_siginfo
*si
, void *userdata
) {
445 _cleanup_free_
char *buffer
= NULL
;
446 _cleanup_fclose_
FILE *f
= NULL
;
447 Manager
*m
= userdata
;
455 f
= open_memstream(&buffer
, &size
);
459 LIST_FOREACH(scopes
, scope
, m
->dns_scopes
)
460 dns_scope_dump(scope
, f
);
462 if (fflush_and_check(f
) < 0)
465 log_dump(LOG_INFO
, buffer
);
469 static int manager_sigusr2(sd_event_source
*s
, const struct signalfd_siginfo
*si
, void *userdata
) {
470 Manager
*m
= userdata
;
476 manager_flush_caches(m
);
477 log_info("Flushed all caches.");
482 int manager_new(Manager
**ret
) {
483 _cleanup_(manager_freep
) Manager
*m
= NULL
;
488 m
= new0(Manager
, 1);
492 m
->llmnr_ipv4_udp_fd
= m
->llmnr_ipv6_udp_fd
= -1;
493 m
->llmnr_ipv4_tcp_fd
= m
->llmnr_ipv6_tcp_fd
= -1;
494 m
->mdns_ipv4_fd
= m
->mdns_ipv6_fd
= -1;
497 m
->llmnr_support
= RESOLVE_SUPPORT_YES
;
498 m
->mdns_support
= RESOLVE_SUPPORT_NO
;
499 m
->dnssec_mode
= DEFAULT_DNSSEC_MODE
;
500 m
->read_resolv_conf
= true;
501 m
->need_builtin_fallbacks
= true;
502 m
->etc_hosts_last
= m
->etc_hosts_mtime
= USEC_INFINITY
;
504 r
= dns_trust_anchor_load(&m
->trust_anchor
);
508 r
= manager_parse_config_file(m
);
512 r
= sd_event_default(&m
->event
);
516 sd_event_add_signal(m
->event
, NULL
, SIGTERM
, NULL
, NULL
);
517 sd_event_add_signal(m
->event
, NULL
, SIGINT
, NULL
, NULL
);
519 sd_event_set_watchdog(m
->event
, true);
521 r
= manager_watch_hostname(m
);
525 r
= dns_scope_new(m
, &m
->unicast_scope
, NULL
, DNS_PROTOCOL_DNS
, AF_UNSPEC
);
529 r
= manager_network_monitor_listen(m
);
533 r
= manager_rtnl_listen(m
);
537 r
= manager_connect_bus(m
);
541 (void) sd_event_add_signal(m
->event
, &m
->sigusr1_event_source
, SIGUSR1
, manager_sigusr1
, m
);
542 (void) sd_event_add_signal(m
->event
, &m
->sigusr2_event_source
, SIGUSR2
, manager_sigusr2
, m
);
550 int manager_start(Manager
*m
) {
555 r
= manager_llmnr_start(m
);
559 r
= manager_mdns_start(m
);
566 Manager
*manager_free(Manager
*m
) {
572 dns_server_unlink_all(m
->dns_servers
);
573 dns_server_unlink_all(m
->fallback_dns_servers
);
574 dns_search_domain_unlink_all(m
->search_domains
);
576 while ((l
= hashmap_first(m
->links
)))
579 while (m
->dns_queries
)
580 dns_query_free(m
->dns_queries
);
582 dns_scope_free(m
->unicast_scope
);
584 hashmap_free(m
->links
);
585 hashmap_free(m
->dns_transactions
);
587 sd_event_source_unref(m
->network_event_source
);
588 sd_network_monitor_unref(m
->network_monitor
);
590 sd_netlink_unref(m
->rtnl
);
591 sd_event_source_unref(m
->rtnl_event_source
);
593 manager_llmnr_stop(m
);
594 manager_mdns_stop(m
);
596 sd_bus_slot_unref(m
->prepare_for_sleep_slot
);
597 sd_event_source_unref(m
->bus_retry_event_source
);
598 sd_bus_unref(m
->bus
);
600 sd_event_source_unref(m
->sigusr1_event_source
);
601 sd_event_source_unref(m
->sigusr2_event_source
);
603 sd_event_unref(m
->event
);
605 dns_resource_key_unref(m
->llmnr_host_ipv4_key
);
606 dns_resource_key_unref(m
->llmnr_host_ipv6_key
);
608 sd_event_source_unref(m
->hostname_event_source
);
609 safe_close(m
->hostname_fd
);
610 free(m
->llmnr_hostname
);
611 free(m
->mdns_hostname
);
613 dns_trust_anchor_flush(&m
->trust_anchor
);
614 manager_etc_hosts_flush(m
);
621 int manager_recv(Manager
*m
, int fd
, DnsProtocol protocol
, DnsPacket
**ret
) {
622 _cleanup_(dns_packet_unrefp
) DnsPacket
*p
= NULL
;
624 struct cmsghdr header
; /* For alignment */
625 uint8_t buffer
[CMSG_SPACE(MAXSIZE(struct in_pktinfo
, struct in6_pktinfo
))
626 + CMSG_SPACE(int) /* ttl/hoplimit */
627 + EXTRA_CMSG_SPACE
/* kernel appears to require extra buffer space */];
629 union sockaddr_union sa
;
630 struct msghdr mh
= {};
631 struct cmsghdr
*cmsg
;
640 ms
= next_datagram_size_fd(fd
);
644 r
= dns_packet_new(&p
, protocol
, ms
);
648 iov
.iov_base
= DNS_PACKET_DATA(p
);
649 iov
.iov_len
= p
->allocated
;
651 mh
.msg_name
= &sa
.sa
;
652 mh
.msg_namelen
= sizeof(sa
);
655 mh
.msg_control
= &control
;
656 mh
.msg_controllen
= sizeof(control
);
658 l
= recvmsg(fd
, &mh
, 0);
662 if (errno
== EAGAIN
|| errno
== EINTR
)
668 assert(!(mh
.msg_flags
& MSG_CTRUNC
));
669 assert(!(mh
.msg_flags
& MSG_TRUNC
));
671 p
->size
= (size_t) l
;
673 p
->family
= sa
.sa
.sa_family
;
674 p
->ipproto
= IPPROTO_UDP
;
675 if (p
->family
== AF_INET
) {
676 p
->sender
.in
= sa
.in
.sin_addr
;
677 p
->sender_port
= be16toh(sa
.in
.sin_port
);
678 } else if (p
->family
== AF_INET6
) {
679 p
->sender
.in6
= sa
.in6
.sin6_addr
;
680 p
->sender_port
= be16toh(sa
.in6
.sin6_port
);
681 p
->ifindex
= sa
.in6
.sin6_scope_id
;
683 return -EAFNOSUPPORT
;
685 CMSG_FOREACH(cmsg
, &mh
) {
687 if (cmsg
->cmsg_level
== IPPROTO_IPV6
) {
688 assert(p
->family
== AF_INET6
);
690 switch (cmsg
->cmsg_type
) {
693 struct in6_pktinfo
*i
= (struct in6_pktinfo
*) CMSG_DATA(cmsg
);
696 p
->ifindex
= i
->ipi6_ifindex
;
698 p
->destination
.in6
= i
->ipi6_addr
;
703 p
->ttl
= *(int *) CMSG_DATA(cmsg
);
707 } else if (cmsg
->cmsg_level
== IPPROTO_IP
) {
708 assert(p
->family
== AF_INET
);
710 switch (cmsg
->cmsg_type
) {
713 struct in_pktinfo
*i
= (struct in_pktinfo
*) CMSG_DATA(cmsg
);
716 p
->ifindex
= i
->ipi_ifindex
;
718 p
->destination
.in
= i
->ipi_addr
;
723 p
->ttl
= *(int *) CMSG_DATA(cmsg
);
729 /* The Linux kernel sets the interface index to the loopback
730 * device if the packet came from the local host since it
731 * avoids the routing table in such a case. Let's unset the
732 * interface index in such a case. */
733 if (p
->ifindex
== LOOPBACK_IFINDEX
)
736 if (protocol
!= DNS_PROTOCOL_DNS
) {
737 /* If we don't know the interface index still, we look for the
738 * first local interface with a matching address. Yuck! */
740 p
->ifindex
= manager_find_ifindex(m
, p
->family
, &p
->destination
);
749 static int sendmsg_loop(int fd
, struct msghdr
*mh
, int flags
) {
756 if (sendmsg(fd
, mh
, flags
) >= 0)
765 r
= fd_wait_for_event(fd
, POLLOUT
, SEND_TIMEOUT_USEC
);
773 static int write_loop(int fd
, void *message
, size_t length
) {
780 if (write(fd
, message
, length
) >= 0)
789 r
= fd_wait_for_event(fd
, POLLOUT
, SEND_TIMEOUT_USEC
);
797 int manager_write(Manager
*m
, int fd
, DnsPacket
*p
) {
800 log_debug("Sending %s packet with id %" PRIu16
".", DNS_PACKET_QR(p
) ? "response" : "query", DNS_PACKET_ID(p
));
802 r
= write_loop(fd
, DNS_PACKET_DATA(p
), p
->size
);
809 static int manager_ipv4_send(Manager
*m
, int fd
, int ifindex
, const struct in_addr
*addr
, uint16_t port
, DnsPacket
*p
) {
810 union sockaddr_union sa
= {
811 .in
.sin_family
= AF_INET
,
814 struct cmsghdr header
; /* For alignment */
815 uint8_t buffer
[CMSG_SPACE(sizeof(struct in_pktinfo
))];
817 struct msghdr mh
= {};
826 iov
.iov_base
= DNS_PACKET_DATA(p
);
827 iov
.iov_len
= p
->size
;
829 sa
.in
.sin_addr
= *addr
;
830 sa
.in
.sin_port
= htobe16(port
),
834 mh
.msg_name
= &sa
.sa
;
835 mh
.msg_namelen
= sizeof(sa
.in
);
838 struct cmsghdr
*cmsg
;
839 struct in_pktinfo
*pi
;
843 mh
.msg_control
= &control
;
844 mh
.msg_controllen
= CMSG_LEN(sizeof(struct in_pktinfo
));
846 cmsg
= CMSG_FIRSTHDR(&mh
);
847 cmsg
->cmsg_len
= mh
.msg_controllen
;
848 cmsg
->cmsg_level
= IPPROTO_IP
;
849 cmsg
->cmsg_type
= IP_PKTINFO
;
851 pi
= (struct in_pktinfo
*) CMSG_DATA(cmsg
);
852 pi
->ipi_ifindex
= ifindex
;
855 return sendmsg_loop(fd
, &mh
, 0);
858 static int manager_ipv6_send(Manager
*m
, int fd
, int ifindex
, const struct in6_addr
*addr
, uint16_t port
, DnsPacket
*p
) {
859 union sockaddr_union sa
= {
860 .in6
.sin6_family
= AF_INET6
,
863 struct cmsghdr header
; /* For alignment */
864 uint8_t buffer
[CMSG_SPACE(sizeof(struct in6_pktinfo
))];
866 struct msghdr mh
= {};
875 iov
.iov_base
= DNS_PACKET_DATA(p
);
876 iov
.iov_len
= p
->size
;
878 sa
.in6
.sin6_addr
= *addr
;
879 sa
.in6
.sin6_port
= htobe16(port
),
880 sa
.in6
.sin6_scope_id
= ifindex
;
884 mh
.msg_name
= &sa
.sa
;
885 mh
.msg_namelen
= sizeof(sa
.in6
);
888 struct cmsghdr
*cmsg
;
889 struct in6_pktinfo
*pi
;
893 mh
.msg_control
= &control
;
894 mh
.msg_controllen
= CMSG_LEN(sizeof(struct in6_pktinfo
));
896 cmsg
= CMSG_FIRSTHDR(&mh
);
897 cmsg
->cmsg_len
= mh
.msg_controllen
;
898 cmsg
->cmsg_level
= IPPROTO_IPV6
;
899 cmsg
->cmsg_type
= IPV6_PKTINFO
;
901 pi
= (struct in6_pktinfo
*) CMSG_DATA(cmsg
);
902 pi
->ipi6_ifindex
= ifindex
;
905 return sendmsg_loop(fd
, &mh
, 0);
908 int manager_send(Manager
*m
, int fd
, int ifindex
, int family
, const union in_addr_union
*addr
, uint16_t port
, DnsPacket
*p
) {
915 log_debug("Sending %s packet with id %" PRIu16
" on interface %i/%s.", DNS_PACKET_QR(p
) ? "response" : "query", DNS_PACKET_ID(p
), ifindex
, af_to_name(family
));
917 if (family
== AF_INET
)
918 return manager_ipv4_send(m
, fd
, ifindex
, &addr
->in
, port
, p
);
919 if (family
== AF_INET6
)
920 return manager_ipv6_send(m
, fd
, ifindex
, &addr
->in6
, port
, p
);
922 return -EAFNOSUPPORT
;
925 uint32_t manager_find_mtu(Manager
*m
) {
930 /* If we don't know on which link a DNS packet would be
931 * delivered, let's find the largest MTU that works on all
932 * interfaces we know of */
934 HASHMAP_FOREACH(l
, m
->links
, i
) {
938 if (mtu
<= 0 || l
->mtu
< mtu
)
945 int manager_find_ifindex(Manager
*m
, int family
, const union in_addr_union
*in_addr
) {
950 a
= manager_find_link_address(m
, family
, in_addr
);
952 return a
->link
->ifindex
;
957 void manager_refresh_rrs(Manager
*m
) {
963 m
->llmnr_host_ipv4_key
= dns_resource_key_unref(m
->llmnr_host_ipv4_key
);
964 m
->llmnr_host_ipv6_key
= dns_resource_key_unref(m
->llmnr_host_ipv6_key
);
966 HASHMAP_FOREACH(l
, m
->links
, i
) {
967 link_add_rrs(l
, true);
968 link_add_rrs(l
, false);
972 int manager_next_hostname(Manager
*m
) {
980 p
= strchr(m
->llmnr_hostname
, 0);
983 while (p
> m
->llmnr_hostname
) {
984 if (!strchr("0123456789", p
[-1]))
990 if (*p
== 0 || safe_atou64(p
, &u
) < 0 || u
<= 0)
993 /* Add a random number to the old value. This way we can avoid
994 * that two hosts pick the same hostname, win on IPv4 and lose
995 * on IPv6 (or vice versa), and pick the same hostname
996 * replacement hostname, ad infinitum. We still want the
997 * numbers to go up monotonically, hence we just add a random
1000 random_bytes(&a
, sizeof(a
));
1003 if (asprintf(&h
, "%.*s%" PRIu64
, (int) (p
- m
->llmnr_hostname
), m
->llmnr_hostname
, u
) < 0)
1006 r
= dns_name_concat(h
, "local", &k
);
1012 log_info("Hostname conflict, changing published hostname from '%s' to '%s'.", m
->llmnr_hostname
, h
);
1014 free(m
->llmnr_hostname
);
1015 m
->llmnr_hostname
= h
;
1017 free(m
->mdns_hostname
);
1018 m
->mdns_hostname
= k
;
1020 manager_refresh_rrs(m
);
1025 LinkAddress
* manager_find_link_address(Manager
*m
, int family
, const union in_addr_union
*in_addr
) {
1031 HASHMAP_FOREACH(l
, m
->links
, i
) {
1034 a
= link_find_address(l
, family
, in_addr
);
1042 bool manager_our_packet(Manager
*m
, DnsPacket
*p
) {
1046 return !!manager_find_link_address(m
, p
->family
, &p
->sender
);
1049 DnsScope
* manager_find_scope(Manager
*m
, DnsPacket
*p
) {
1055 l
= hashmap_get(m
->links
, INT_TO_PTR(p
->ifindex
));
1059 switch (p
->protocol
) {
1060 case DNS_PROTOCOL_LLMNR
:
1061 if (p
->family
== AF_INET
)
1062 return l
->llmnr_ipv4_scope
;
1063 else if (p
->family
== AF_INET6
)
1064 return l
->llmnr_ipv6_scope
;
1068 case DNS_PROTOCOL_MDNS
:
1069 if (p
->family
== AF_INET
)
1070 return l
->mdns_ipv4_scope
;
1071 else if (p
->family
== AF_INET6
)
1072 return l
->mdns_ipv6_scope
;
1083 void manager_verify_all(Manager
*m
) {
1088 LIST_FOREACH(scopes
, s
, m
->dns_scopes
)
1089 dns_zone_verify_all(&s
->zone
);
1092 int manager_is_own_hostname(Manager
*m
, const char *name
) {
1098 if (m
->llmnr_hostname
) {
1099 r
= dns_name_equal(name
, m
->llmnr_hostname
);
1104 if (m
->mdns_hostname
)
1105 return dns_name_equal(name
, m
->mdns_hostname
);
1110 int manager_compile_dns_servers(Manager
*m
, OrderedSet
**dns
) {
1119 r
= ordered_set_ensure_allocated(dns
, &dns_server_hash_ops
);
1123 /* First add the system-wide servers and domains */
1124 LIST_FOREACH(servers
, s
, m
->dns_servers
) {
1125 r
= ordered_set_put(*dns
, s
);
1132 /* Then, add the per-link servers */
1133 HASHMAP_FOREACH(l
, m
->links
, i
) {
1134 LIST_FOREACH(servers
, s
, l
->dns_servers
) {
1135 r
= ordered_set_put(*dns
, s
);
1143 /* If we found nothing, add the fallback servers */
1144 if (ordered_set_isempty(*dns
)) {
1145 LIST_FOREACH(servers
, s
, m
->fallback_dns_servers
) {
1146 r
= ordered_set_put(*dns
, s
);
1157 int manager_compile_search_domains(Manager
*m
, OrderedSet
**domains
) {
1166 r
= ordered_set_ensure_allocated(domains
, &dns_name_hash_ops
);
1170 LIST_FOREACH(domains
, d
, m
->search_domains
) {
1171 r
= ordered_set_put(*domains
, d
->name
);
1178 HASHMAP_FOREACH(l
, m
->links
, i
) {
1180 LIST_FOREACH(domains
, d
, l
->search_domains
) {
1181 r
= ordered_set_put(*domains
, d
->name
);
1192 DnssecMode
manager_get_dnssec_mode(Manager
*m
) {
1195 if (m
->dnssec_mode
!= _DNSSEC_MODE_INVALID
)
1196 return m
->dnssec_mode
;
1201 bool manager_dnssec_supported(Manager
*m
) {
1208 if (manager_get_dnssec_mode(m
) == DNSSEC_NO
)
1211 server
= manager_get_dns_server(m
);
1212 if (server
&& !dns_server_dnssec_supported(server
))
1215 HASHMAP_FOREACH(l
, m
->links
, i
)
1216 if (!link_dnssec_supported(l
))
1222 void manager_dnssec_verdict(Manager
*m
, DnssecVerdict verdict
, const DnsResourceKey
*key
) {
1224 assert(verdict
>= 0);
1225 assert(verdict
< _DNSSEC_VERDICT_MAX
);
1227 if (log_get_max_level() >= LOG_DEBUG
) {
1228 char s
[DNS_RESOURCE_KEY_STRING_MAX
];
1230 log_debug("Found verdict for lookup %s: %s",
1231 dns_resource_key_to_string(key
, s
, sizeof s
),
1232 dnssec_verdict_to_string(verdict
));
1235 m
->n_dnssec_verdict
[verdict
]++;
1238 bool manager_routable(Manager
*m
, int family
) {
1244 /* Returns true if the host has at least one interface with a routable address of the specified type */
1246 HASHMAP_FOREACH(l
, m
->links
, i
)
1247 if (link_relevant(l
, family
, false))
1253 void manager_flush_caches(Manager
*m
) {
1258 LIST_FOREACH(scopes
, scope
, m
->dns_scopes
)
1259 dns_cache_flush(&scope
->cache
);