-/* SPDX-License-Identifier: LGPL-2.1+ */
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <resolv.h>
#include <netinet/in.h>
#include "fd-util.h"
#include "resolved-manager.h"
#include "resolved-mdns.h"
+#include "sort-util.h"
#define CLEAR_CACHE_FLUSH(x) (~MDNS_RR_CACHE_FLUSH & (x))
void manager_mdns_stop(Manager *m) {
assert(m);
- m->mdns_ipv4_event_source = sd_event_source_unref(m->mdns_ipv4_event_source);
+ m->mdns_ipv4_event_source = sd_event_source_disable_unref(m->mdns_ipv4_event_source);
m->mdns_ipv4_fd = safe_close(m->mdns_ipv4_fd);
- m->mdns_ipv6_event_source = sd_event_source_unref(m->mdns_ipv6_event_source);
+ m->mdns_ipv6_event_source = sd_event_source_disable_unref(m->mdns_ipv6_event_source);
m->mdns_ipv6_fd = safe_close(m->mdns_ipv6_fd);
}
r = dns_zone_lookup(&s->zone, key, 0, &answer, &soa, &tentative);
if (r < 0)
- return log_debug_errno(r, "Failed to lookup key: %m");
+ return log_debug_errno(r, "Failed to look up key: %m");
if (tentative && DNS_PACKET_NSCOUNT(p) > 0) {
/*
if (!ratelimit_below(&s->ratelimit))
return 0;
- r = dns_scope_emit_udp(s, -1, reply);
+ r = dns_scope_emit_udp(s, -1, AF_UNSPEC, reply);
if (r < 0)
return log_debug_errno(r, "Failed to send reply packet: %m");
if (r <= 0)
return r;
- if (manager_our_packet(m, p))
+ if (manager_packet_from_local_address(m, p))
return 0;
scope = manager_find_scope(m, p);
const char *name = dns_resource_key_name(rr->key);
DnsTransaction *t;
- /* If the received reply packet contains ANY record that is not .local or .in-addr.arpa,
- * we assume someone's playing tricks on us and discard the packet completely. */
+ /* If the received reply packet contains ANY record that is not .local
+ * or .in-addr.arpa or .ip6.arpa, we assume someone's playing tricks on
+ * us and discard the packet completely. */
if (!(dns_name_endswith(name, "in-addr.arpa") > 0 ||
+ dns_name_endswith(name, "ip6.arpa") > 0 ||
dns_name_endswith(name, "local") > 0))
return 0;
rr->ttl = 1;
}
- t = dns_scope_find_transaction(scope, rr->key, false);
+ t = dns_scope_find_transaction(scope, rr->key, SD_RESOLVED_NO_CACHE|SD_RESOLVED_NO_ZONE);
if (t)
- dns_transaction_process_reply(t, p);
+ dns_transaction_process_reply(t, p, false);
/* Also look for the various types of ANY transactions */
- t = dns_scope_find_transaction(scope, &DNS_RESOURCE_KEY_CONST(rr->key->class, DNS_TYPE_ANY, dns_resource_key_name(rr->key)), false);
+ t = dns_scope_find_transaction(scope, &DNS_RESOURCE_KEY_CONST(rr->key->class, DNS_TYPE_ANY, dns_resource_key_name(rr->key)), SD_RESOLVED_NO_CACHE|SD_RESOLVED_NO_ZONE);
if (t)
- dns_transaction_process_reply(t, p);
+ dns_transaction_process_reply(t, p, false);
- t = dns_scope_find_transaction(scope, &DNS_RESOURCE_KEY_CONST(DNS_CLASS_ANY, rr->key->type, dns_resource_key_name(rr->key)), false);
+ t = dns_scope_find_transaction(scope, &DNS_RESOURCE_KEY_CONST(DNS_CLASS_ANY, rr->key->type, dns_resource_key_name(rr->key)), SD_RESOLVED_NO_CACHE|SD_RESOLVED_NO_ZONE);
if (t)
- dns_transaction_process_reply(t, p);
+ dns_transaction_process_reply(t, p, false);
- t = dns_scope_find_transaction(scope, &DNS_RESOURCE_KEY_CONST(DNS_CLASS_ANY, DNS_TYPE_ANY, dns_resource_key_name(rr->key)), false);
+ t = dns_scope_find_transaction(scope, &DNS_RESOURCE_KEY_CONST(DNS_CLASS_ANY, DNS_TYPE_ANY, dns_resource_key_name(rr->key)), SD_RESOLVED_NO_CACHE|SD_RESOLVED_NO_ZONE);
if (t)
- dns_transaction_process_reply(t, p);
+ dns_transaction_process_reply(t, p, false);
}
- dns_cache_put(&scope->cache, NULL, DNS_PACKET_RCODE(p), p->answer, false, (uint32_t) -1, 0, p->family, &p->sender);
+ dns_cache_put(&scope->cache, scope->manager->enable_cache, NULL, DNS_PACKET_RCODE(p), p->answer, NULL, false, _DNSSEC_RESULT_INVALID, UINT32_MAX, p->family, &p->sender);
} else if (dns_packet_validate_query(p) > 0) {
log_debug("Got mDNS query packet for id %u", DNS_PACKET_ID(p));
.in.sin_family = AF_INET,
.in.sin_port = htobe16(MDNS_PORT),
};
- static const int pmtu = IP_PMTUDISC_DONT, ttl = 255;
+ _cleanup_close_ int s = -1;
int r;
assert(m);
if (m->mdns_ipv4_fd >= 0)
return m->mdns_ipv4_fd;
- m->mdns_ipv4_fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
- if (m->mdns_ipv4_fd < 0)
+ s = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+ if (s < 0)
return log_error_errno(errno, "mDNS-IPv4: Failed to create socket: %m");
- r = setsockopt(m->mdns_ipv4_fd, IPPROTO_IP, IP_TTL, &ttl, sizeof(ttl));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv4: Failed to set IP_TTL: %m");
- goto fail;
- }
+ r = setsockopt_int(s, IPPROTO_IP, IP_TTL, 255);
+ if (r < 0)
+ return log_error_errno(r, "mDNS-IPv4: Failed to set IP_TTL: %m");
- r = setsockopt(m->mdns_ipv4_fd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv4: Failed to set IP_MULTICAST_TTL: %m");
- goto fail;
- }
+ r = setsockopt_int(s, IPPROTO_IP, IP_MULTICAST_TTL, 255);
+ if (r < 0)
+ return log_error_errno(r, "mDNS-IPv4: Failed to set IP_MULTICAST_TTL: %m");
- r = setsockopt(m->mdns_ipv4_fd, IPPROTO_IP, IP_MULTICAST_LOOP, &const_int_one, sizeof(const_int_one));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv4: Failed to set IP_MULTICAST_LOOP: %m");
- goto fail;
- }
+ r = setsockopt_int(s, IPPROTO_IP, IP_MULTICAST_LOOP, true);
+ if (r < 0)
+ return log_error_errno(r, "mDNS-IPv4: Failed to set IP_MULTICAST_LOOP: %m");
- r = setsockopt(m->mdns_ipv4_fd, IPPROTO_IP, IP_PKTINFO, &const_int_one, sizeof(const_int_one));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv4: Failed to set IP_PKTINFO: %m");
- goto fail;
- }
+ r = setsockopt_int(s, IPPROTO_IP, IP_PKTINFO, true);
+ if (r < 0)
+ return log_error_errno(r, "mDNS-IPv4: Failed to set IP_PKTINFO: %m");
- r = setsockopt(m->mdns_ipv4_fd, IPPROTO_IP, IP_RECVTTL, &const_int_one, sizeof(const_int_one));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv4: Failed to set IP_RECVTTL: %m");
- goto fail;
- }
+ r = setsockopt_int(s, IPPROTO_IP, IP_RECVTTL, true);
+ if (r < 0)
+ return log_error_errno(r, "mDNS-IPv4: Failed to set IP_RECVTTL: %m");
/* Disable Don't-Fragment bit in the IP header */
- r = setsockopt(m->mdns_ipv4_fd, IPPROTO_IP, IP_MTU_DISCOVER, &pmtu, sizeof(pmtu));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv4: Failed to set IP_MTU_DISCOVER: %m");
- goto fail;
- }
+ r = setsockopt_int(s, IPPROTO_IP, IP_MTU_DISCOVER, IP_PMTUDISC_DONT);
+ if (r < 0)
+ return log_error_errno(r, "mDNS-IPv4: Failed to set IP_MTU_DISCOVER: %m");
/* See the section 15.1 of RFC6762 */
/* first try to bind without SO_REUSEADDR to detect another mDNS responder */
- r = bind(m->mdns_ipv4_fd, &sa.sa, sizeof(sa.in));
+ r = bind(s, &sa.sa, sizeof(sa.in));
if (r < 0) {
- if (errno != EADDRINUSE) {
- r = log_error_errno(errno, "mDNS-IPv4: Failed to bind socket: %m");
- goto fail;
- }
+ if (errno != EADDRINUSE)
+ return log_error_errno(errno, "mDNS-IPv4: Failed to bind socket: %m");
log_warning("mDNS-IPv4: There appears to be another mDNS responder running, or previously systemd-resolved crashed with some outstanding transfers.");
/* try again with SO_REUSEADDR */
- r = setsockopt(m->mdns_ipv4_fd, SOL_SOCKET, SO_REUSEADDR, &const_int_one, sizeof(const_int_one));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv4: Failed to set SO_REUSEADDR: %m");
- goto fail;
- }
+ r = setsockopt_int(s, SOL_SOCKET, SO_REUSEADDR, true);
+ if (r < 0)
+ return log_error_errno(r, "mDNS-IPv4: Failed to set SO_REUSEADDR: %m");
- r = bind(m->mdns_ipv4_fd, &sa.sa, sizeof(sa.in));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv4: Failed to bind socket: %m");
- goto fail;
- }
+ r = bind(s, &sa.sa, sizeof(sa.in));
+ if (r < 0)
+ return log_error_errno(errno, "mDNS-IPv4: Failed to bind socket: %m");
} else {
/* enable SO_REUSEADDR for the case that the user really wants multiple mDNS responders */
- r = setsockopt(m->mdns_ipv4_fd, SOL_SOCKET, SO_REUSEADDR, &const_int_one, sizeof(const_int_one));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv4: Failed to set SO_REUSEADDR: %m");
- goto fail;
- }
+ r = setsockopt_int(s, SOL_SOCKET, SO_REUSEADDR, true);
+ if (r < 0)
+ return log_error_errno(r, "mDNS-IPv4: Failed to set SO_REUSEADDR: %m");
}
- r = sd_event_add_io(m->event, &m->mdns_ipv4_event_source, m->mdns_ipv4_fd, EPOLLIN, on_mdns_packet, m);
+ r = sd_event_add_io(m->event, &m->mdns_ipv4_event_source, s, EPOLLIN, on_mdns_packet, m);
if (r < 0)
- goto fail;
-
- return m->mdns_ipv4_fd;
+ return log_error_errno(r, "mDNS-IPv4: Failed to create event source: %m");
-fail:
- m->mdns_ipv4_fd = safe_close(m->mdns_ipv4_fd);
- return r;
+ return m->mdns_ipv4_fd = TAKE_FD(s);
}
int manager_mdns_ipv6_fd(Manager *m) {
.in6.sin6_family = AF_INET6,
.in6.sin6_port = htobe16(MDNS_PORT),
};
- static const int ttl = 255;
+ _cleanup_close_ int s = -1;
int r;
assert(m);
if (m->mdns_ipv6_fd >= 0)
return m->mdns_ipv6_fd;
- m->mdns_ipv6_fd = socket(AF_INET6, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
- if (m->mdns_ipv6_fd < 0)
+ s = socket(AF_INET6, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+ if (s < 0)
return log_error_errno(errno, "mDNS-IPv6: Failed to create socket: %m");
- r = setsockopt(m->mdns_ipv6_fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &ttl, sizeof(ttl));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv6: Failed to set IPV6_UNICAST_HOPS: %m");
- goto fail;
- }
+ r = setsockopt_int(s, IPPROTO_IPV6, IPV6_UNICAST_HOPS, 255);
+ if (r < 0)
+ return log_error_errno(r, "mDNS-IPv6: Failed to set IPV6_UNICAST_HOPS: %m");
/* RFC 4795, section 2.5 recommends setting the TTL of UDP packets to 255. */
- r = setsockopt(m->mdns_ipv6_fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &ttl, sizeof(ttl));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv6: Failed to set IPV6_MULTICAST_HOPS: %m");
- goto fail;
- }
+ r = setsockopt_int(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, 255);
+ if (r < 0)
+ return log_error_errno(r, "mDNS-IPv6: Failed to set IPV6_MULTICAST_HOPS: %m");
- r = setsockopt(m->mdns_ipv6_fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &const_int_one, sizeof(const_int_one));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv6: Failed to set IPV6_MULTICAST_LOOP: %m");
- goto fail;
- }
+ r = setsockopt_int(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, true);
+ if (r < 0)
+ return log_error_errno(r, "mDNS-IPv6: Failed to set IPV6_MULTICAST_LOOP: %m");
- r = setsockopt(m->mdns_ipv6_fd, IPPROTO_IPV6, IPV6_V6ONLY, &const_int_one, sizeof(const_int_one));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv6: Failed to set IPV6_V6ONLY: %m");
- goto fail;
- }
+ r = setsockopt_int(s, IPPROTO_IPV6, IPV6_V6ONLY, true);
+ if (r < 0)
+ return log_error_errno(r, "mDNS-IPv6: Failed to set IPV6_V6ONLY: %m");
- r = setsockopt(m->mdns_ipv6_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &const_int_one, sizeof(const_int_one));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv6: Failed to set IPV6_RECVPKTINFO: %m");
- goto fail;
- }
+ r = setsockopt_int(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, true);
+ if (r < 0)
+ return log_error_errno(r, "mDNS-IPv6: Failed to set IPV6_RECVPKTINFO: %m");
- r = setsockopt(m->mdns_ipv6_fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &const_int_one, sizeof(const_int_one));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv6: Failed to set IPV6_RECVHOPLIMIT: %m");
- goto fail;
- }
+ r = setsockopt_int(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, true);
+ if (r < 0)
+ return log_error_errno(r, "mDNS-IPv6: Failed to set IPV6_RECVHOPLIMIT: %m");
/* See the section 15.1 of RFC6762 */
/* first try to bind without SO_REUSEADDR to detect another mDNS responder */
- r = bind(m->mdns_ipv6_fd, &sa.sa, sizeof(sa.in6));
+ r = bind(s, &sa.sa, sizeof(sa.in6));
if (r < 0) {
- if (errno != EADDRINUSE) {
- r = log_error_errno(errno, "mDNS-IPv6: Failed to bind socket: %m");
- goto fail;
- }
+ if (errno != EADDRINUSE)
+ return log_error_errno(errno, "mDNS-IPv6: Failed to bind socket: %m");
log_warning("mDNS-IPv6: There appears to be another mDNS responder running, or previously systemd-resolved crashed with some outstanding transfers.");
/* try again with SO_REUSEADDR */
- r = setsockopt(m->mdns_ipv6_fd, SOL_SOCKET, SO_REUSEADDR, &const_int_one, sizeof(const_int_one));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv6: Failed to set SO_REUSEADDR: %m");
- goto fail;
- }
+ r = setsockopt_int(s, SOL_SOCKET, SO_REUSEADDR, true);
+ if (r < 0)
+ return log_error_errno(r, "mDNS-IPv6: Failed to set SO_REUSEADDR: %m");
- r = bind(m->mdns_ipv6_fd, &sa.sa, sizeof(sa.in6));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv6: Failed to bind socket: %m");
- goto fail;
- }
+ r = bind(s, &sa.sa, sizeof(sa.in6));
+ if (r < 0)
+ return log_error_errno(errno, "mDNS-IPv6: Failed to bind socket: %m");
} else {
/* enable SO_REUSEADDR for the case that the user really wants multiple mDNS responders */
- r = setsockopt(m->mdns_ipv6_fd, SOL_SOCKET, SO_REUSEADDR, &const_int_one, sizeof(const_int_one));
- if (r < 0) {
- r = log_error_errno(errno, "mDNS-IPv6: Failed to set SO_REUSEADDR: %m");
- goto fail;
- }
+ r = setsockopt_int(s, SOL_SOCKET, SO_REUSEADDR, true);
+ if (r < 0)
+ return log_error_errno(r, "mDNS-IPv6: Failed to set SO_REUSEADDR: %m");
}
- r = sd_event_add_io(m->event, &m->mdns_ipv6_event_source, m->mdns_ipv6_fd, EPOLLIN, on_mdns_packet, m);
+ r = sd_event_add_io(m->event, &m->mdns_ipv6_event_source, s, EPOLLIN, on_mdns_packet, m);
if (r < 0)
- goto fail;
-
- return m->mdns_ipv6_fd;
+ return log_error_errno(r, "mDNS-IPv6: Failed to create event source: %m");
-fail:
- m->mdns_ipv6_fd = safe_close(m->mdns_ipv6_fd);
- return r;
+ return m->mdns_ipv6_fd = TAKE_FD(s);
}
projects / thirdparty / systemd.git / blobdiff