X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=src%2Fresolve%2Fresolved-manager.c;h=1407c637e88abfbb385119dc1a0be28442e255be;hb=4d506d6bb757af3b99e0876234c465e6898c5ea4;hp=f8d4db7aada58080d5168485e485adab83721d59;hpb=d11270119023cf1e1807293b3b46a8b9ad1c0869;p=thirdparty%2Fsystemd.git

diff --git a/src/resolve/resolved-manager.c b/src/resolve/resolved-manager.c
index f8d4db7aada..1407c637e88 100644
--- a/src/resolve/resolved-manager.c
+++ b/src/resolve/resolved-manager.c
@@ -24,7 +24,7 @@
 #include <poll.h>
 #include <netinet/in.h>
 
-#include "rtnl-util.h"
+#include "netlink-util.h"
 #include "network-internal.h"
 #include "socket-util.h"
 #include "af-list.h"
@@ -38,10 +38,11 @@
 #include "resolved-conf.h"
 #include "resolved-bus.h"
 #include "resolved-manager.h"
+#include "resolved-llmnr.h"
 
 #define SEND_TIMEOUT_USEC (200 * USEC_PER_MSEC)
 
-static int manager_process_link(sd_rtnl *rtnl, sd_rtnl_message *mm, void *userdata) {
+static int manager_process_link(sd_netlink *rtnl, sd_netlink_message *mm, void *userdata) {
         Manager *m = userdata;
         uint16_t type;
         Link *l;
@@ -51,7 +52,7 @@ static int manager_process_link(sd_rtnl *rtnl, sd_rtnl_message *mm, void *userda
         assert(m);
         assert(mm);
 
-        r = sd_rtnl_message_get_type(mm, &type);
+        r = sd_netlink_message_get_type(mm, &type);
         if (r < 0)
                 goto fail;
 
@@ -102,7 +103,7 @@ fail:
         return 0;
 }
 
-static int manager_process_address(sd_rtnl *rtnl, sd_rtnl_message *mm, void *userdata) {
+static int manager_process_address(sd_netlink *rtnl, sd_netlink_message *mm, void *userdata) {
         Manager *m = userdata;
         union in_addr_union address;
         uint16_t type;
@@ -114,7 +115,7 @@ static int manager_process_address(sd_rtnl *rtnl, sd_rtnl_message *mm, void *use
         assert(mm);
         assert(m);
 
-        r = sd_rtnl_message_get_type(mm, &type);
+        r = sd_netlink_message_get_type(mm, &type);
         if (r < 0)
                 goto fail;
 
@@ -133,9 +134,9 @@ static int manager_process_address(sd_rtnl *rtnl, sd_rtnl_message *mm, void *use
         switch (family) {
 
         case AF_INET:
-                r = sd_rtnl_message_read_in_addr(mm, IFA_LOCAL, &address.in);
+                r = sd_netlink_message_read_in_addr(mm, IFA_LOCAL, &address.in);
                 if (r < 0) {
-                        r = sd_rtnl_message_read_in_addr(mm, IFA_ADDRESS, &address.in);
+                        r = sd_netlink_message_read_in_addr(mm, IFA_ADDRESS, &address.in);
                         if (r < 0)
                                 goto fail;
                 }
@@ -143,9 +144,9 @@ static int manager_process_address(sd_rtnl *rtnl, sd_rtnl_message *mm, void *use
                 break;
 
         case AF_INET6:
-                r = sd_rtnl_message_read_in6_addr(mm, IFA_LOCAL, &address.in6);
+                r = sd_netlink_message_read_in6_addr(mm, IFA_LOCAL, &address.in6);
                 if (r < 0) {
-                        r = sd_rtnl_message_read_in6_addr(mm, IFA_ADDRESS, &address.in6);
+                        r = sd_netlink_message_read_in6_addr(mm, IFA_ADDRESS, &address.in6);
                         if (r < 0)
                                 goto fail;
                 }
@@ -175,8 +176,7 @@ static int manager_process_address(sd_rtnl *rtnl, sd_rtnl_message *mm, void *use
                 break;
 
         case RTM_DELADDR:
-                if (a)
-                        link_address_free(a);
+                link_address_free(a);
                 break;
         }
 
@@ -188,34 +188,34 @@ fail:
 }
 
 static int manager_rtnl_listen(Manager *m) {
-        _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
-        sd_rtnl_message *i;
+        _cleanup_netlink_message_unref_ sd_netlink_message *req = NULL, *reply = NULL;
+        sd_netlink_message *i;
         int r;
 
         assert(m);
 
         /* First, subscribe to interfaces coming and going */
-        r = sd_rtnl_open(&m->rtnl, 3, RTNLGRP_LINK, RTNLGRP_IPV4_IFADDR, RTNLGRP_IPV6_IFADDR);
+        r = sd_netlink_open(&m->rtnl);
         if (r < 0)
                 return r;
 
-        r = sd_rtnl_attach_event(m->rtnl, m->event, 0);
+        r = sd_netlink_attach_event(m->rtnl, m->event, 0);
         if (r < 0)
                 return r;
 
-        r = sd_rtnl_add_match(m->rtnl, RTM_NEWLINK, manager_process_link, m);
+        r = sd_netlink_add_match(m->rtnl, RTM_NEWLINK, manager_process_link, m);
         if (r < 0)
                 return r;
 
-        r = sd_rtnl_add_match(m->rtnl, RTM_DELLINK, manager_process_link, m);
+        r = sd_netlink_add_match(m->rtnl, RTM_DELLINK, manager_process_link, m);
         if (r < 0)
                 return r;
 
-        r = sd_rtnl_add_match(m->rtnl, RTM_NEWADDR, manager_process_address, m);
+        r = sd_netlink_add_match(m->rtnl, RTM_NEWADDR, manager_process_address, m);
         if (r < 0)
                 return r;
 
-        r = sd_rtnl_add_match(m->rtnl, RTM_DELADDR, manager_process_address, m);
+        r = sd_netlink_add_match(m->rtnl, RTM_DELADDR, manager_process_address, m);
         if (r < 0)
                 return r;
 
@@ -224,37 +224,37 @@ static int manager_rtnl_listen(Manager *m) {
         if (r < 0)
                 return r;
 
-        r = sd_rtnl_message_request_dump(req, true);
+        r = sd_netlink_message_request_dump(req, true);
         if (r < 0)
                 return r;
 
-        r = sd_rtnl_call(m->rtnl, req, 0, &reply);
+        r = sd_netlink_call(m->rtnl, req, 0, &reply);
         if (r < 0)
                 return r;
 
-        for (i = reply; i; i = sd_rtnl_message_next(i)) {
+        for (i = reply; i; i = sd_netlink_message_next(i)) {
                 r = manager_process_link(m->rtnl, i, m);
                 if (r < 0)
                         return r;
         }
 
-        req = sd_rtnl_message_unref(req);
-        reply = sd_rtnl_message_unref(reply);
+        req = sd_netlink_message_unref(req);
+        reply = sd_netlink_message_unref(reply);
 
         /* Finally, enumerate all addresses, too */
         r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, AF_UNSPEC);
         if (r < 0)
                 return r;
 
-        r = sd_rtnl_message_request_dump(req, true);
+        r = sd_netlink_message_request_dump(req, true);
         if (r < 0)
                 return r;
 
-        r = sd_rtnl_call(m->rtnl, req, 0, &reply);
+        r = sd_netlink_call(m->rtnl, req, 0, &reply);
         if (r < 0)
                 return r;
 
-        for (i = reply; i; i = sd_rtnl_message_next(i)) {
+        for (i = reply; i; i = sd_netlink_message_next(i)) {
                 r = manager_process_address(m->rtnl, i, m);
                 if (r < 0)
                         return r;
@@ -310,51 +310,84 @@ static int manager_network_monitor_listen(Manager *m) {
         return 0;
 }
 
-static int determine_hostname(char **ret) {
+static int determine_hostname(char **llmnr_hostname, char **mdns_hostname) {
         _cleanup_free_ char *h = NULL, *n = NULL;
-        int r;
+        char label[DNS_LABEL_MAX];
+        const char *p;
+        int r, k;
 
-        assert(ret);
+        assert(llmnr_hostname);
+        assert(mdns_hostname);
+
+        /* Extract and normalize the first label of the locally
+         * configured hostname, and check it's not "localhost". */
 
         h = gethostname_malloc();
         if (!h)
                 return log_oom();
 
-        if (!utf8_is_valid(h)) {
+        p = h;
+        r = dns_label_unescape(&p, label, sizeof(label));
+        if (r < 0)
+                return log_error_errno(r, "Failed to unescape host name: %m");
+        if (r == 0) {
+                log_error("Couldn't find a single label in hosntame.");
+                return -EINVAL;
+        }
+
+        k = dns_label_undo_idna(label, r, label, sizeof(label));
+        if (k < 0)
+                return log_error_errno(k, "Failed to undo IDNA: %m");
+        if (k > 0)
+                r = k;
+
+        if (!utf8_is_valid(label)) {
                 log_error("System hostname is not UTF-8 clean.");
                 return -EINVAL;
         }
 
-        r = dns_name_normalize(h, &n);
-        if (r < 0) {
-                log_error("System hostname '%s' cannot be normalized.", h);
-                return r;
+        r = dns_label_escape(label, r, &n);
+        if (r < 0)
+                return log_error_errno(r, "Failed to escape host name: %m");
+
+        if (is_localhost(n)) {
+                log_debug("System hostname is 'localhost', ignoring.");
+                return -EINVAL;
         }
 
-        *ret = n;
+        r = dns_name_concat(n, "local", mdns_hostname);
+        if (r < 0)
+                return log_error_errno(r, "Failed to determine mDNS hostname: %m");
+
+        *llmnr_hostname = n;
         n = NULL;
 
         return 0;
 }
 
 static int on_hostname_change(sd_event_source *es, int fd, uint32_t revents, void *userdata) {
-        _cleanup_free_ char *h = NULL;
+        _cleanup_free_ char *llmnr_hostname = NULL, *mdns_hostname = NULL;
         Manager *m = userdata;
         int r;
 
         assert(m);
 
-        r = determine_hostname(&h);
+        r = determine_hostname(&llmnr_hostname, &mdns_hostname);
         if (r < 0)
                 return 0; /* ignore invalid hostnames */
 
-        if (streq(h, m->hostname))
+        if (streq(llmnr_hostname, m->llmnr_hostname) && streq(mdns_hostname, m->mdns_hostname))
                 return 0;
 
-        log_info("System hostname changed to '%s'.", h);
-        free(m->hostname);
-        m->hostname = h;
-        h = NULL;
+        log_info("System hostname changed to '%s'.", llmnr_hostname);
+
+        free(m->llmnr_hostname);
+        free(m->mdns_hostname);
+
+        m->llmnr_hostname = llmnr_hostname;
+        m->mdns_hostname = mdns_hostname;
+
+        llmnr_hostname = mdns_hostname = NULL;
 
         manager_refresh_rrs(m);
 
@@ -381,75 +414,44 @@ static int manager_watch_hostname(Manager *m) {
                         return log_error_errno(r, "Failed to add hostname event source: %m");
         }
 
-        r = determine_hostname(&m->hostname);
+        r = determine_hostname(&m->llmnr_hostname, &m->mdns_hostname);
         if (r < 0) {
                 log_info("Defaulting to hostname 'linux'.");
-                m->hostname = strdup("linux");
-                if (!m->hostname)
+                m->llmnr_hostname = strdup("linux");
+                if (!m->llmnr_hostname)
+                        return log_oom();
+
+                m->mdns_hostname = strdup("linux.local");
+                if (!m->mdns_hostname)
                         return log_oom();
         } else
-                log_info("Using system hostname '%s'.", m->hostname);
+                log_info("Using system hostname '%s'.", m->llmnr_hostname);
 
         return 0;
 }
 
-static void manager_llmnr_stop(Manager *m) {
-        assert(m);
-
-        m->llmnr_ipv4_udp_event_source = sd_event_source_unref(m->llmnr_ipv4_udp_event_source);
-        m->llmnr_ipv4_udp_fd = safe_close(m->llmnr_ipv4_udp_fd);
-
-        m->llmnr_ipv6_udp_event_source = sd_event_source_unref(m->llmnr_ipv6_udp_event_source);
-        m->llmnr_ipv6_udp_fd = safe_close(m->llmnr_ipv6_udp_fd);
-
-        m->llmnr_ipv4_tcp_event_source = sd_event_source_unref(m->llmnr_ipv4_tcp_event_source);
-        m->llmnr_ipv4_tcp_fd = safe_close(m->llmnr_ipv4_tcp_fd);
-
-        m->llmnr_ipv6_tcp_event_source = sd_event_source_unref(m->llmnr_ipv6_tcp_event_source);
-        m->llmnr_ipv6_tcp_fd = safe_close(m->llmnr_ipv6_tcp_fd);
-}
-
-static int manager_llmnr_start(Manager *m) {
-        int r;
+static int manager_sigusr1(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
+        _cleanup_free_ char *buffer = NULL;
+        _cleanup_fclose_ FILE *f = NULL;
+        Manager *m = userdata;
+        size_t size = 0;
+        DnsScope *scope;
 
+        assert(s);
+        assert(si);
         assert(m);
 
-        if (m->llmnr_support == SUPPORT_NO)
-                return 0;
-
-        r = manager_llmnr_ipv4_udp_fd(m);
-        if (r == -EADDRINUSE)
-                goto eaddrinuse;
-        if (r < 0)
-                return r;
-
-        r = manager_llmnr_ipv4_tcp_fd(m);
-        if (r == -EADDRINUSE)
-                goto eaddrinuse;
-        if (r < 0)
-                return r;
-
-        if (socket_ipv6_is_supported()) {
-                r = manager_llmnr_ipv6_udp_fd(m);
-                if (r == -EADDRINUSE)
-                        goto eaddrinuse;
-                if (r < 0)
-                        return r;
-
-                r = manager_llmnr_ipv6_tcp_fd(m);
-                if (r == -EADDRINUSE)
-                        goto eaddrinuse;
-                if (r < 0)
-                        return r;
-        }
+        f = open_memstream(&buffer, &size);
+        if (!f)
+                return log_oom();
 
-        return 0;
+        LIST_FOREACH(scopes, scope, m->dns_scopes)
+                dns_scope_dump(scope, f);
 
-eaddrinuse:
-        log_warning("There appears to be another LLMNR responder running. Turning off LLMNR support.");
-        m->llmnr_support = SUPPORT_NO;
-        manager_llmnr_stop(m);
+        if (fflush_and_check(f) < 0)
+                return log_oom();
 
+        log_dump(LOG_INFO, buffer);
         return 0;
 }
 
@@ -463,7 +465,6 @@ int manager_new(Manager **ret) {
         if (!m)
                 return -ENOMEM;
 
-        m->dns_ipv4_fd = m->dns_ipv6_fd = -1;
         m->llmnr_ipv4_udp_fd = m->llmnr_ipv6_udp_fd = -1;
         m->llmnr_ipv4_tcp_fd = m->llmnr_ipv6_tcp_fd = -1;
         m->hostname_fd = -1;
@@ -504,6 +505,8 @@ int manager_new(Manager **ret) {
         if (r < 0)
                 return r;
 
+        (void) sd_event_add_signal(m->event, &m->sigusr1_event_source, SIGUSR1, manager_sigusr1, m);
+
         *ret = m;
         m = NULL;
 
@@ -545,25 +548,23 @@ Manager *manager_free(Manager *m) {
         sd_event_source_unref(m->network_event_source);
         sd_network_monitor_unref(m->network_monitor);
 
-        sd_event_source_unref(m->dns_ipv4_event_source);
-        sd_event_source_unref(m->dns_ipv6_event_source);
-        safe_close(m->dns_ipv4_fd);
-        safe_close(m->dns_ipv6_fd);
-
         manager_llmnr_stop(m);
 
         sd_bus_slot_unref(m->prepare_for_sleep_slot);
         sd_event_source_unref(m->bus_retry_event_source);
         sd_bus_unref(m->bus);
 
+        sd_event_source_unref(m->sigusr1_event_source);
+
         sd_event_unref(m->event);
 
-        dns_resource_key_unref(m->host_ipv4_key);
-        dns_resource_key_unref(m->host_ipv6_key);
+        dns_resource_key_unref(m->llmnr_host_ipv4_key);
+        dns_resource_key_unref(m->llmnr_host_ipv6_key);
 
         safe_close(m->hostname_fd);
         sd_event_source_unref(m->hostname_event_source);
-        free(m->hostname);
+        free(m->llmnr_hostname);
+        free(m->mdns_hostname);
 
         free(m);
 
@@ -662,8 +663,10 @@ int manager_read_resolv_conf(Manager *m) {
         }
 
         LIST_FOREACH_SAFE(servers, s, nx, m->dns_servers)
-                if (s->marked)
-                        dns_server_free(s);
+                if (s->marked) {
+                        LIST_REMOVE(servers, m->dns_servers, s);
+                        dns_server_unref(s);
+                }
 
         /* Whenever /etc/resolv.conf changes, start using the first
          * DNS server of it. This is useful to deal with broken
@@ -678,8 +681,12 @@ int manager_read_resolv_conf(Manager *m) {
         return 0;
 
 clear:
-        while (m->dns_servers)
-                dns_server_free(m->dns_servers);
+        while (m->dns_servers) {
+                s = m->dns_servers;
+
+                LIST_REMOVE(servers, m->dns_servers, s);
+                dns_server_unref(s);
+        }
 
         return r;
 }
@@ -971,10 +978,12 @@ int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) {
         if (p->ifindex == LOOPBACK_IFINDEX)
                 p->ifindex = 0;
 
-        /* If we don't know the interface index still, we look for the
-         * first local interface with a matching address. Yuck! */
-        if (p->ifindex <= 0)
-                p->ifindex = manager_find_ifindex(m, p->family, &p->destination);
+        if (protocol != DNS_PROTOCOL_DNS) {
+                /* If we don't know the interface index still, we look for the
+                 * first local interface with a matching address. Yuck! */
+                if (p->ifindex <= 0)
+                        p->ifindex = manager_find_ifindex(m, p->family, &p->destination);
+        }
 
         *ret = p;
         p = NULL;
@@ -982,97 +991,38 @@ int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) {
         return 1;
 }
 
-static int on_dns_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
-        _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;
-        DnsTransaction *t = NULL;
-        Manager *m = userdata;
+static int sendmsg_loop(int fd, struct msghdr *mh, int flags) {
         int r;
 
-        r = manager_recv(m, fd, DNS_PROTOCOL_DNS, &p);
-        if (r <= 0)
-                return r;
+        assert(fd >= 0);
+        assert(mh);
 
-        if (dns_packet_validate_reply(p) > 0) {
-                t = hashmap_get(m->dns_transactions, UINT_TO_PTR(DNS_PACKET_ID(p)));
-                if (!t)
+        for (;;) {
+                if (sendmsg(fd, mh, flags) >= 0)
                         return 0;
 
-                dns_transaction_process_reply(t, p);
-
-        } else
-                log_debug("Invalid DNS packet.");
-
-        return 0;
-}
-
-int manager_dns_ipv4_fd(Manager *m) {
-        const int one = 1;
-        int r;
-
-        assert(m);
-
-        if (m->dns_ipv4_fd >= 0)
-                return m->dns_ipv4_fd;
-
-        m->dns_ipv4_fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
-        if (m->dns_ipv4_fd < 0)
-                return -errno;
-
-        r = setsockopt(m->dns_ipv4_fd, IPPROTO_IP, IP_PKTINFO, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = sd_event_add_io(m->event, &m->dns_ipv4_event_source, m->dns_ipv4_fd, EPOLLIN, on_dns_packet, m);
-        if (r < 0)
-                goto fail;
-
-        return m->dns_ipv4_fd;
-
-fail:
-        m->dns_ipv4_fd = safe_close(m->dns_ipv4_fd);
-        return r;
-}
-
-int manager_dns_ipv6_fd(Manager *m) {
-        const int one = 1;
-        int r;
-
-        assert(m);
-
-        if (m->dns_ipv6_fd >= 0)
-                return m->dns_ipv6_fd;
+                if (errno == EINTR)
+                        continue;
 
-        m->dns_ipv6_fd = socket(AF_INET6, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
-        if (m->dns_ipv6_fd < 0)
-                return -errno;
+                if (errno != EAGAIN)
+                        return -errno;
 
-        r = setsockopt(m->dns_ipv6_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
+                r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC);
+                if (r < 0)
+                        return r;
+                if (r == 0)
+                        return -ETIMEDOUT;
         }
-
-        r = sd_event_add_io(m->event, &m->dns_ipv6_event_source, m->dns_ipv6_fd, EPOLLIN, on_dns_packet, m);
-        if (r < 0)
-                goto fail;
-
-        return m->dns_ipv6_fd;
-
-fail:
-        m->dns_ipv6_fd = safe_close(m->dns_ipv6_fd);
-        return r;
 }
 
-static int sendmsg_loop(int fd, struct msghdr *mh, int flags) {
+static int write_loop(int fd, void *message, size_t length) {
         int r;
 
         assert(fd >= 0);
-        assert(mh);
+        assert(message);
 
         for (;;) {
-                if (sendmsg(fd, mh, flags) >= 0)
+                if (write(fd, message, length) >= 0)
                         return 0;
 
                 if (errno == EINTR)
@@ -1089,6 +1039,18 @@ static int sendmsg_loop(int fd, struct msghdr *mh, int flags) {
         }
 }
 
+int manager_write(Manager *m, int fd, DnsPacket *p) {
+        int r;
+
+        log_debug("Sending %s packet with id %u", DNS_PACKET_QR(p) ? "response" : "query", DNS_PACKET_ID(p));
+
+        r = write_loop(fd, DNS_PACKET_DATA(p), p->size);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
 static int manager_ipv4_send(Manager *m, int fd, int ifindex, const struct in_addr *addr, uint16_t port, DnsPacket *p) {
         union sockaddr_union sa = {
                 .in.sin_family = AF_INET,
@@ -1316,393 +1278,6 @@ uint32_t manager_find_mtu(Manager *m) {
         return mtu;
 }
 
-static int on_llmnr_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
-        _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;
-        DnsTransaction *t = NULL;
-        Manager *m = userdata;
-        DnsScope *scope;
-        int r;
-
-        r = manager_recv(m, fd, DNS_PROTOCOL_LLMNR, &p);
-        if (r <= 0)
-                return r;
-
-        scope = manager_find_scope(m, p);
-        if (!scope) {
-                log_warning("Got LLMNR UDP packet on unknown scope. Ignoring.");
-                return 0;
-        }
-
-        if (dns_packet_validate_reply(p) > 0) {
-                log_debug("Got reply packet for id %u", DNS_PACKET_ID(p));
-
-                dns_scope_check_conflicts(scope, p);
-
-                t = hashmap_get(m->dns_transactions, UINT_TO_PTR(DNS_PACKET_ID(p)));
-                if (t)
-                        dns_transaction_process_reply(t, p);
-
-        } else if (dns_packet_validate_query(p) > 0)  {
-                log_debug("Got query packet for id %u", DNS_PACKET_ID(p));
-
-                dns_scope_process_query(scope, NULL, p);
-        } else
-                log_debug("Invalid LLMNR UDP packet.");
-
-        return 0;
-}
-
-int manager_llmnr_ipv4_udp_fd(Manager *m) {
-        union sockaddr_union sa = {
-                .in.sin_family = AF_INET,
-                .in.sin_port = htobe16(5355),
-        };
-        static const int one = 1, pmtu = IP_PMTUDISC_DONT, ttl = 255;
-        int r;
-
-        assert(m);
-
-        if (m->llmnr_ipv4_udp_fd >= 0)
-                return m->llmnr_ipv4_udp_fd;
-
-        m->llmnr_ipv4_udp_fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
-        if (m->llmnr_ipv4_udp_fd < 0)
-                return -errno;
-
-        /* RFC 4795, section 2.5 recommends setting the TTL of UDP packets to 255. */
-        r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_TTL, &ttl, sizeof(ttl));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_MULTICAST_LOOP, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = setsockopt(m->llmnr_ipv4_udp_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_PKTINFO, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_RECVTTL, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        /* Disable Don't-Fragment bit in the IP header */
-        r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_MTU_DISCOVER, &pmtu, sizeof(pmtu));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = bind(m->llmnr_ipv4_udp_fd, &sa.sa, sizeof(sa.in));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = sd_event_add_io(m->event, &m->llmnr_ipv4_udp_event_source, m->llmnr_ipv4_udp_fd, EPOLLIN, on_llmnr_packet, m);
-        if (r < 0)
-                goto fail;
-
-        return m->llmnr_ipv4_udp_fd;
-
-fail:
-        m->llmnr_ipv4_udp_fd = safe_close(m->llmnr_ipv4_udp_fd);
-        return r;
-}
-
-int manager_llmnr_ipv6_udp_fd(Manager *m) {
-        union sockaddr_union sa = {
-                .in6.sin6_family = AF_INET6,
-                .in6.sin6_port = htobe16(5355),
-        };
-        static const int one = 1, ttl = 255;
-        int r;
-
-        assert(m);
-
-        if (m->llmnr_ipv6_udp_fd >= 0)
-                return m->llmnr_ipv6_udp_fd;
-
-        m->llmnr_ipv6_udp_fd = socket(AF_INET6, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
-        if (m->llmnr_ipv6_udp_fd < 0)
-                return -errno;
-
-        r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &ttl, sizeof(ttl));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        /* RFC 4795, section 2.5 recommends setting the TTL of UDP packets to 255. */
-        r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &ttl, sizeof(ttl));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = setsockopt(m->llmnr_ipv6_udp_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = bind(m->llmnr_ipv6_udp_fd, &sa.sa, sizeof(sa.in6));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = sd_event_add_io(m->event, &m->llmnr_ipv6_udp_event_source, m->llmnr_ipv6_udp_fd, EPOLLIN, on_llmnr_packet, m);
-        if (r < 0)  {
-                r = -errno;
-                goto fail;
-        }
-
-        return m->llmnr_ipv6_udp_fd;
-
-fail:
-        m->llmnr_ipv6_udp_fd = safe_close(m->llmnr_ipv6_udp_fd);
-        return r;
-}
-
-static int on_llmnr_stream_packet(DnsStream *s) {
-        DnsScope *scope;
-
-        assert(s);
-
-        scope = manager_find_scope(s->manager, s->read_packet);
-        if (!scope) {
-                log_warning("Got LLMNR TCP packet on unknown scope. Ignroing.");
-                return 0;
-        }
-
-        if (dns_packet_validate_query(s->read_packet) > 0) {
-                log_debug("Got query packet for id %u", DNS_PACKET_ID(s->read_packet));
-
-                dns_scope_process_query(scope, s, s->read_packet);
-
-                /* If no reply packet was set, we free the stream */
-                if (s->write_packet)
-                        return 0;
-        } else
-                log_debug("Invalid LLMNR TCP packet.");
-
-        dns_stream_free(s);
-        return 0;
-}
-
-static int on_llmnr_stream(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
-        DnsStream *stream;
-        Manager *m = userdata;
-        int cfd, r;
-
-        cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC);
-        if (cfd < 0) {
-                if (errno == EAGAIN || errno == EINTR)
-                        return 0;
-
-                return -errno;
-        }
-
-        r = dns_stream_new(m, &stream, DNS_PROTOCOL_LLMNR, cfd);
-        if (r < 0) {
-                safe_close(cfd);
-                return r;
-        }
-
-        stream->on_packet = on_llmnr_stream_packet;
-        return 0;
-}
-
-int manager_llmnr_ipv4_tcp_fd(Manager *m) {
-        union sockaddr_union sa = {
-                .in.sin_family = AF_INET,
-                .in.sin_port = htobe16(5355),
-        };
-        static const int one = 1, pmtu = IP_PMTUDISC_DONT;
-        int r;
-
-        assert(m);
-
-        if (m->llmnr_ipv4_tcp_fd >= 0)
-                return m->llmnr_ipv4_tcp_fd;
-
-        m->llmnr_ipv4_tcp_fd = socket(AF_INET, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
-        if (m->llmnr_ipv4_tcp_fd < 0)
-                return -errno;
-
-        /* RFC 4795, section 2.5. requires setting the TTL of TCP streams to 1 */
-        r = setsockopt(m->llmnr_ipv4_tcp_fd, IPPROTO_IP, IP_TTL, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = setsockopt(m->llmnr_ipv4_tcp_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = setsockopt(m->llmnr_ipv4_tcp_fd, IPPROTO_IP, IP_PKTINFO, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = setsockopt(m->llmnr_ipv4_tcp_fd, IPPROTO_IP, IP_RECVTTL, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        /* Disable Don't-Fragment bit in the IP header */
-        r = setsockopt(m->llmnr_ipv4_tcp_fd, IPPROTO_IP, IP_MTU_DISCOVER, &pmtu, sizeof(pmtu));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = bind(m->llmnr_ipv4_tcp_fd, &sa.sa, sizeof(sa.in));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = listen(m->llmnr_ipv4_tcp_fd, SOMAXCONN);
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = sd_event_add_io(m->event, &m->llmnr_ipv4_tcp_event_source, m->llmnr_ipv4_tcp_fd, EPOLLIN, on_llmnr_stream, m);
-        if (r < 0)
-                goto fail;
-
-        return m->llmnr_ipv4_tcp_fd;
-
-fail:
-        m->llmnr_ipv4_tcp_fd = safe_close(m->llmnr_ipv4_tcp_fd);
-        return r;
-}
-
-int manager_llmnr_ipv6_tcp_fd(Manager *m) {
-        union sockaddr_union sa = {
-                .in6.sin6_family = AF_INET6,
-                .in6.sin6_port = htobe16(5355),
-        };
-        static const int one = 1;
-        int r;
-
-        assert(m);
-
-        if (m->llmnr_ipv6_tcp_fd >= 0)
-                return m->llmnr_ipv6_tcp_fd;
-
-        m->llmnr_ipv6_tcp_fd = socket(AF_INET6, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
-        if (m->llmnr_ipv6_tcp_fd < 0)
-                return -errno;
-
-        /* RFC 4795, section 2.5. requires setting the TTL of TCP streams to 1 */
-        r = setsockopt(m->llmnr_ipv6_tcp_fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = setsockopt(m->llmnr_ipv6_tcp_fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = setsockopt(m->llmnr_ipv6_tcp_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = setsockopt(m->llmnr_ipv6_tcp_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = setsockopt(m->llmnr_ipv6_tcp_fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = bind(m->llmnr_ipv6_tcp_fd, &sa.sa, sizeof(sa.in6));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = listen(m->llmnr_ipv6_tcp_fd, SOMAXCONN);
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        r = sd_event_add_io(m->event, &m->llmnr_ipv6_tcp_event_source, m->llmnr_ipv6_tcp_fd, EPOLLIN, on_llmnr_stream, m);
-        if (r < 0)  {
-                r = -errno;
-                goto fail;
-        }
-
-        return m->llmnr_ipv6_tcp_fd;
-
-fail:
-        m->llmnr_ipv6_tcp_fd = safe_close(m->llmnr_ipv6_tcp_fd);
-        return r;
-}
-
 int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr) {
         LinkAddress *a;
 
@@ -1721,8 +1296,8 @@ void manager_refresh_rrs(Manager *m) {
 
         assert(m);
 
-        m->host_ipv4_key = dns_resource_key_unref(m->host_ipv4_key);
-        m->host_ipv6_key = dns_resource_key_unref(m->host_ipv6_key);
+        m->llmnr_host_ipv4_key = dns_resource_key_unref(m->llmnr_host_ipv4_key);
+        m->llmnr_host_ipv6_key = dns_resource_key_unref(m->llmnr_host_ipv6_key);
 
         HASHMAP_FOREACH(l, m->links, i) {
                 link_add_rrs(l, true);
@@ -1733,14 +1308,15 @@ void manager_refresh_rrs(Manager *m) {
 int manager_next_hostname(Manager *m) {
         const char *p;
         uint64_t u, a;
-        char *h;
+        char *h, *k;
+        int r;
 
         assert(m);
 
-        p = strchr(m->hostname, 0);
+        p = strchr(m->llmnr_hostname, 0);
         assert(p);
 
-        while (p > m->hostname) {
+        while (p > m->llmnr_hostname) {
                 if (!strchr("0123456789", p[-1]))
                         break;
 
@@ -1760,13 +1336,22 @@ int manager_next_hostname(Manager *m) {
         random_bytes(&a, sizeof(a));
         u += 1 + a % 10;
 
-        if (asprintf(&h, "%.*s%" PRIu64, (int) (p - m->hostname), m->hostname, u) < 0)
+        if (asprintf(&h, "%.*s%" PRIu64, (int) (p - m->llmnr_hostname), m->llmnr_hostname, u) < 0)
                 return -ENOMEM;
 
-        log_info("Hostname conflict, changing published hostname from '%s' to '%s'.", m->hostname, h);
+        r = dns_name_concat(h, "local", &k);
+        if (r < 0) {
+                free(h);
+                return r;
+        }
 
-        free(m->hostname);
-        m->hostname = h;
+        log_info("Hostname conflict, changing published hostname from '%s' to '%s'.", m->llmnr_hostname, h);
+
+        free(m->llmnr_hostname);
+        m->llmnr_hostname = h;
+
+        free(m->mdns_hostname);
+        m->mdns_hostname = k;
 
         manager_refresh_rrs(m);
 
@@ -1827,15 +1412,43 @@ void manager_verify_all(Manager *m) {
 }
 
 void manager_flush_dns_servers(Manager *m, DnsServerType t) {
+        DnsServer *s;
+
         assert(m);
 
         if (t == DNS_SERVER_SYSTEM)
-                while (m->dns_servers)
-                        dns_server_free(m->dns_servers);
+                while (m->dns_servers) {
+                        s = m->dns_servers;
+
+                        LIST_REMOVE(servers, m->dns_servers, s);
+                        dns_server_unref(s);
+                }
 
         if (t == DNS_SERVER_FALLBACK)
-                while (m->fallback_dns_servers)
-                        dns_server_free(m->fallback_dns_servers);
+                while (m->fallback_dns_servers) {
+                        s = m->fallback_dns_servers;
+
+                        LIST_REMOVE(servers, m->fallback_dns_servers, s);
+                        dns_server_unref(s);
+                }
+}
+
+int manager_is_own_hostname(Manager *m, const char *name) {
+        int r;
+
+        assert(m);
+        assert(name);
+
+        if (m->llmnr_hostname) {
+                r = dns_name_equal(name, m->llmnr_hostname);
+                if (r != 0)
+                        return r;
+        }
+
+        if (m->mdns_hostname)
+                return dns_name_equal(name, m->mdns_hostname);
+
+        return 0;
 }
 
 static const char* const support_table[_SUPPORT_MAX] = {