Remove src/resolve

1 files changed, 0 insertions, 1841 deletions

diff --git a/src/resolve/resolved-manager.c b/src/resolve/resolved-manager.c
deleted file mode 100644
index 167bea39b3..0000000000
--- a/src/resolve/resolved-manager.c
+++ /dev/null
@@ -1,1841 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright 2014 Tom Gundersen <teg@jklm.no>
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 of the License, or
-  (at your option) any later version.
-
-  systemd is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
- ***/
-
-#include <resolv.h>
-#include <sys/ioctl.h>
-#include <poll.h>
-#include <netinet/in.h>
-
-#include "rtnl-util.h"
-#include "network-internal.h"
-#include "socket-util.h"
-#include "af-list.h"
-#include "utf8.h"
-#include "fileio-label.h"
-
-#include "resolved-dns-domain.h"
-#include "resolved-conf.h"
-#include "resolved-bus.h"
-#include "resolved-manager.h"
-
-#define SEND_TIMEOUT_USEC (200 * USEC_PER_MSEC)
-
-static int manager_process_link(sd_rtnl *rtnl, sd_rtnl_message *mm, void *userdata) {
-        Manager *m = userdata;
-        uint16_t type;
-        Link *l;
-        int ifindex, r;
-
-        assert(rtnl);
-        assert(m);
-        assert(mm);
-
-        r = sd_rtnl_message_get_type(mm, &type);
-        if (r < 0)
-                goto fail;
-
-        r = sd_rtnl_message_link_get_ifindex(mm, &ifindex);
-        if (r < 0)
-                goto fail;
-
-        l = hashmap_get(m->links, INT_TO_PTR(ifindex));
-
-        switch (type) {
-
-        case RTM_NEWLINK:{
-                bool is_new = !l;
-
-                if (!l) {
-                        r = link_new(m, &l, ifindex);
-                        if (r < 0)
-                                goto fail;
-                }
-
-                r = link_update_rtnl(l, mm);
-                if (r < 0)
-                        goto fail;
-
-                r = link_update_monitor(l);
-                if (r < 0)
-                        goto fail;
-
-                if (is_new)
-                        log_debug("Found new link %i/%s", ifindex, l->name);
-
-                break;
-        }
-
-        case RTM_DELLINK:
-                if (l) {
-                        log_debug("Removing link %i/%s", l->ifindex, l->name);
-                        link_free(l);
-                }
-
-                break;
-        }
-
-        return 0;
-
-fail:
-        log_warning_errno(r, "Failed to process RTNL link message: %m");
-        return 0;
-}
-
-static int manager_process_address(sd_rtnl *rtnl, sd_rtnl_message *mm, void *userdata) {
-        Manager *m = userdata;
-        union in_addr_union address;
-        uint16_t type;
-        int r, ifindex, family;
-        LinkAddress *a;
-        Link *l;
-
-        assert(rtnl);
-        assert(mm);
-        assert(m);
-
-        r = sd_rtnl_message_get_type(mm, &type);
-        if (r < 0)
-                goto fail;
-
-        r = sd_rtnl_message_addr_get_ifindex(mm, &ifindex);
-        if (r < 0)
-                goto fail;
-
-        l = hashmap_get(m->links, INT_TO_PTR(ifindex));
-        if (!l)
-                return 0;
-
-        r = sd_rtnl_message_addr_get_family(mm, &family);
-        if (r < 0)
-                goto fail;
-
-        switch (family) {
-
-        case AF_INET:
-                r = sd_rtnl_message_read_in_addr(mm, IFA_LOCAL, &address.in);
-                if (r < 0) {
-                        r = sd_rtnl_message_read_in_addr(mm, IFA_ADDRESS, &address.in);
-                        if (r < 0)
-                                goto fail;
-                }
-
-                break;
-
-        case AF_INET6:
-                r = sd_rtnl_message_read_in6_addr(mm, IFA_LOCAL, &address.in6);
-                if (r < 0) {
-                        r = sd_rtnl_message_read_in6_addr(mm, IFA_ADDRESS, &address.in6);
-                        if (r < 0)
-                                goto fail;
-                }
-
-                break;
-
-        default:
-                return 0;
-        }
-
-        a = link_find_address(l, family, &address);
-
-        switch (type) {
-
-        case RTM_NEWADDR:
-
-                if (!a) {
-                        r = link_address_new(l, &a, family, &address);
-                        if (r < 0)
-                                return r;
-                }
-
-                r = link_address_update_rtnl(a, mm);
-                if (r < 0)
-                        return r;
-
-                break;
-
-        case RTM_DELADDR:
-                if (a)
-                        link_address_free(a);
-                break;
-        }
-
-        return 0;
-
-fail:
-        log_warning_errno(r, "Failed to process RTNL address message: %m");
-        return 0;
-}
-
-static int manager_rtnl_listen(Manager *m) {
-        _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
-        sd_rtnl_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);
-        if (r < 0)
-                return r;
-
-        r = sd_rtnl_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);
-        if (r < 0)
-                return r;
-
-        r = sd_rtnl_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);
-        if (r < 0)
-                return r;
-
-        r = sd_rtnl_add_match(m->rtnl, RTM_DELADDR, manager_process_address, m);
-        if (r < 0)
-                return r;
-
-        /* Then, enumerate all links */
-        r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
-        if (r < 0)
-                return r;
-
-        r = sd_rtnl_message_request_dump(req, true);
-        if (r < 0)
-                return r;
-
-        r = sd_rtnl_call(m->rtnl, req, 0, &reply);
-        if (r < 0)
-                return r;
-
-        for (i = reply; i; i = sd_rtnl_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);
-
-        /* 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);
-        if (r < 0)
-                return r;
-
-        r = sd_rtnl_call(m->rtnl, req, 0, &reply);
-        if (r < 0)
-                return r;
-
-        for (i = reply; i; i = sd_rtnl_message_next(i)) {
-                r = manager_process_address(m->rtnl, i, m);
-                if (r < 0)
-                        return r;
-        }
-
-        return r;
-}
-
-static int on_network_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
-        Manager *m = userdata;
-        Iterator i;
-        Link *l;
-        int r;
-
-        assert(m);
-
-        sd_network_monitor_flush(m->network_monitor);
-
-        HASHMAP_FOREACH(l, m->links, i) {
-                r = link_update_monitor(l);
-                if (r < 0)
-                        log_warning_errno(r, "Failed to update monitor information for %i: %m", l->ifindex);
-        }
-
-        r = manager_write_resolv_conf(m);
-        if (r < 0)
-                log_warning_errno(r, "Could not update resolv.conf: %m");
-
-        return 0;
-}
-
-static int manager_network_monitor_listen(Manager *m) {
-        int r, fd, events;
-
-        assert(m);
-
-        r = sd_network_monitor_new(&m->network_monitor, NULL);
-        if (r < 0)
-                return r;
-
-        fd = sd_network_monitor_get_fd(m->network_monitor);
-        if (fd < 0)
-                return fd;
-
-        events = sd_network_monitor_get_events(m->network_monitor);
-        if (events < 0)
-                return events;
-
-        r = sd_event_add_io(m->event, &m->network_event_source, fd, events, &on_network_event, m);
-        if (r < 0)
-                return r;
-
-        return 0;
-}
-
-static int determine_hostname(char **ret) {
-        _cleanup_free_ char *h = NULL, *n = NULL;
-        int r;
-
-        assert(ret);
-
-        h = gethostname_malloc();
-        if (!h)
-                return log_oom();
-
-        if (!utf8_is_valid(h)) {
-                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;
-        }
-
-        *ret = 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;
-        Manager *m = userdata;
-        int r;
-
-        assert(m);
-
-        r = determine_hostname(&h);
-        if (r < 0)
-                return 0; /* ignore invalid hostnames */
-
-        if (streq(h, m->hostname))
-                return 0;
-
-        log_info("System hostname changed to '%s'.", h);
-        free(m->hostname);
-        m->hostname = h;
-        h = NULL;
-
-        manager_refresh_rrs(m);
-
-        return 0;
-}
-
-static int manager_watch_hostname(Manager *m) {
-        int r;
-
-        assert(m);
-
-        m->hostname_fd = open("/proc/sys/kernel/hostname", O_RDONLY|O_CLOEXEC|O_NDELAY|O_NOCTTY);
-        if (m->hostname_fd < 0) {
-                log_warning_errno(errno, "Failed to watch hostname: %m");
-                return 0;
-        }
-
-        r = sd_event_add_io(m->event, &m->hostname_event_source, m->hostname_fd, 0, on_hostname_change, m);
-        if (r < 0) {
-                if (r == -EPERM)
-                        /* kernels prior to 3.2 don't support polling this file. Ignore the failure. */
-                        m->hostname_fd = safe_close(m->hostname_fd);
-                else
-                        return log_error_errno(r, "Failed to add hostname event source: %m");
-        }
-
-        r = determine_hostname(&m->hostname);
-        if (r < 0) {
-                log_info("Defaulting to hostname 'linux'.");
-                m->hostname = strdup("linux");
-                if (!m->hostname)
-                        return log_oom();
-        } else
-                log_info("Using system hostname '%s'.", m->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;
-
-        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;
-        }
-
-        return 0;
-
-eaddrinuse:
-        log_warning("There appears to be another LLMNR responder running. Turning off LLMNR support.");
-        m->llmnr_support = SUPPORT_NO;
-        manager_llmnr_stop(m);
-
-        return 0;
-}
-
-int manager_new(Manager **ret) {
-        _cleanup_(manager_freep) Manager *m = NULL;
-        int r;
-
-        assert(ret);
-
-        m = new0(Manager, 1);
-        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;
-
-        m->llmnr_support = SUPPORT_YES;
-        m->read_resolv_conf = true;
-
-        r = manager_parse_dns_server(m, DNS_SERVER_FALLBACK, DNS_SERVERS);
-        if (r < 0)
-                return r;
-
-        r = sd_event_default(&m->event);
-        if (r < 0)
-                return r;
-
-        sd_event_add_signal(m->event, NULL, SIGTERM, NULL,  NULL);
-        sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
-
-        sd_event_set_watchdog(m->event, true);
-
-        r = manager_watch_hostname(m);
-        if (r < 0)
-                return r;
-
-        r = dns_scope_new(m, &m->unicast_scope, NULL, DNS_PROTOCOL_DNS, AF_UNSPEC);
-        if (r < 0)
-                return r;
-
-        r = manager_network_monitor_listen(m);
-        if (r < 0)
-                return r;
-
-        r = manager_rtnl_listen(m);
-        if (r < 0)
-                return r;
-
-        r = manager_connect_bus(m);
-        if (r < 0)
-                return r;
-
-        *ret = m;
-        m = NULL;
-
-        return 0;
-}
-
-int manager_start(Manager *m) {
-        int r;
-
-        assert(m);
-
-        r = manager_llmnr_start(m);
-        if (r < 0)
-                return r;
-
-        return 0;
-}
-
-Manager *manager_free(Manager *m) {
-        Link *l;
-
-        if (!m)
-                return NULL;
-
-        while ((l = hashmap_first(m->links)))
-               link_free(l);
-
-        while (m->dns_queries)
-                dns_query_free(m->dns_queries);
-
-        dns_scope_free(m->unicast_scope);
-
-        manager_flush_dns_servers(m, DNS_SERVER_SYSTEM);
-        manager_flush_dns_servers(m, DNS_SERVER_FALLBACK);
-
-        hashmap_free(m->links);
-        hashmap_free(m->dns_transactions);
-
-        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_unref(m->event);
-
-        dns_resource_key_unref(m->host_ipv4_key);
-        dns_resource_key_unref(m->host_ipv6_key);
-
-        safe_close(m->hostname_fd);
-        sd_event_source_unref(m->hostname_event_source);
-        free(m->hostname);
-
-        free(m);
-
-        return NULL;
-}
-
-int manager_read_resolv_conf(Manager *m) {
-        _cleanup_fclose_ FILE *f = NULL;
-        struct stat st, own;
-        char line[LINE_MAX];
-        DnsServer *s, *nx;
-        usec_t t;
-        int r;
-
-        assert(m);
-
-        /* Reads the system /etc/resolv.conf, if it exists and is not
-         * symlinked to our own resolv.conf instance */
-
-        if (!m->read_resolv_conf)
-                return 0;
-
-        r = stat("/etc/resolv.conf", &st);
-        if (r < 0) {
-                if (errno != ENOENT)
-                        log_warning_errno(errno, "Failed to open /etc/resolv.conf: %m");
-                r = -errno;
-                goto clear;
-        }
-
-        /* Have we already seen the file? */
-        t = timespec_load(&st.st_mtim);
-        if (t == m->resolv_conf_mtime)
-                return 0;
-
-        m->resolv_conf_mtime = t;
-
-        /* Is it symlinked to our own file? */
-        if (stat("/run/systemd/resolve/resolv.conf", &own) >= 0 &&
-            st.st_dev == own.st_dev &&
-            st.st_ino == own.st_ino) {
-                r = 0;
-                goto clear;
-        }
-
-        f = fopen("/etc/resolv.conf", "re");
-        if (!f) {
-                if (errno != ENOENT)
-                        log_warning_errno(errno, "Failed to open /etc/resolv.conf: %m");
-                r = -errno;
-                goto clear;
-        }
-
-        if (fstat(fileno(f), &st) < 0) {
-                log_error_errno(errno, "Failed to stat open file: %m");
-                r = -errno;
-                goto clear;
-        }
-
-        LIST_FOREACH(servers, s, m->dns_servers)
-                s->marked = true;
-
-        FOREACH_LINE(line, f, r = -errno; goto clear) {
-                union in_addr_union address;
-                int family;
-                char *l;
-                const char *a;
-
-                truncate_nl(line);
-
-                l = strstrip(line);
-                if (*l == '#' || *l == ';')
-                        continue;
-
-                a = first_word(l, "nameserver");
-                if (!a)
-                        continue;
-
-                r = in_addr_from_string_auto(a, &family, &address);
-                if (r < 0) {
-                        log_warning("Failed to parse name server %s.", a);
-                        continue;
-                }
-
-                LIST_FOREACH(servers, s, m->dns_servers)
-                        if (s->family == family && in_addr_equal(family, &s->address, &address) > 0)
-                                break;
-
-                if (s)
-                        s->marked = false;
-                else {
-                        r = dns_server_new(m, NULL, DNS_SERVER_SYSTEM, NULL, family, &address);
-                        if (r < 0)
-                                goto clear;
-                }
-        }
-
-        LIST_FOREACH_SAFE(servers, s, nx, m->dns_servers)
-                if (s->marked)
-                        dns_server_free(s);
-
-        /* Whenever /etc/resolv.conf changes, start using the first
-         * DNS server of it. This is useful to deal with broken
-         * network managing implementations (like NetworkManager),
-         * that when connecting to a VPN place both the VPN DNS
-         * servers and the local ones in /etc/resolv.conf. Without
-         * resetting the DNS server to use back to the first entry we
-         * will continue to use the local one thus being unable to
-         * resolve VPN domains. */
-        manager_set_dns_server(m, m->dns_servers);
-
-        return 0;
-
-clear:
-        while (m->dns_servers)
-                dns_server_free(m->dns_servers);
-
-        return r;
-}
-
-static void write_resolv_conf_server(DnsServer *s, FILE *f, unsigned *count) {
-        _cleanup_free_ char *t  = NULL;
-        int r;
-
-        assert(s);
-        assert(f);
-        assert(count);
-
-        r = in_addr_to_string(s->family, &s->address, &t);
-        if (r < 0) {
-                log_warning_errno(r, "Invalid DNS address. Ignoring: %m");
-                return;
-        }
-
-        if (*count == MAXNS)
-                fputs("# Too many DNS servers configured, the following entries may be ignored.\n", f);
-
-        fprintf(f, "nameserver %s\n", t);
-        (*count) ++;
-}
-
-static void write_resolv_conf_search(const char *domain, FILE *f,
-                                     unsigned *count, unsigned *length) {
-        assert(domain);
-        assert(f);
-        assert(length);
-
-        if (*count >= MAXDNSRCH ||
-            *length + strlen(domain) > 256) {
-                if (*count == MAXDNSRCH)
-                        fputs(" # Too many search domains configured, remaining ones ignored.", f);
-                if (*length <= 256)
-                        fputs(" # Total length of all search domains is too long, remaining ones ignored.", f);
-
-                return;
-        }
-
-        fprintf(f, " %s", domain);
-
-        (*length) += strlen(domain);
-        (*count) ++;
-}
-
-static int write_resolv_conf_contents(FILE *f, Set *dns, Set *domains) {
-        Iterator i;
-
-        fputs("# This file is managed by systemd-resolved(8). Do not edit.\n#\n"
-              "# Third party programs must not access this file directly, but\n"
-              "# only through the symlink at /etc/resolv.conf. To manage\n"
-              "# resolv.conf(5) in a different way, replace the symlink by a\n"
-              "# static file or a different symlink.\n\n", f);
-
-        if (set_isempty(dns))
-                fputs("# No DNS servers known.\n", f);
-        else {
-                DnsServer *s;
-                unsigned count = 0;
-
-                SET_FOREACH(s, dns, i)
-                        write_resolv_conf_server(s, f, &count);
-        }
-
-        if (!set_isempty(domains)) {
-                unsigned length = 0, count = 0;
-                char *domain;
-
-                fputs("search", f);
-                SET_FOREACH(domain, domains, i)
-                        write_resolv_conf_search(domain, f, &count, &length);
-                fputs("\n", f);
-        }
-
-        return fflush_and_check(f);
-}
-
-
-int manager_write_resolv_conf(Manager *m) {
-        static const char path[] = "/run/systemd/resolve/resolv.conf";
-        _cleanup_free_ char *temp_path = NULL;
-        _cleanup_fclose_ FILE *f = NULL;
-        _cleanup_set_free_ Set *dns = NULL, *domains = NULL;
-        DnsServer *s;
-        Iterator i;
-        Link *l;
-        int r;
-
-        assert(m);
-
-        /* Read the system /etc/resolv.conf first */
-        manager_read_resolv_conf(m);
-
-        /* Add the full list to a set, to filter out duplicates */
-        dns = set_new(&dns_server_hash_ops);
-        if (!dns)
-                return -ENOMEM;
-
-        domains = set_new(&dns_name_hash_ops);
-        if (!domains)
-                return -ENOMEM;
-
-        /* First add the system-wide servers */
-        LIST_FOREACH(servers, s, m->dns_servers) {
-                r = set_put(dns, s);
-                if (r == -EEXIST)
-                        continue;
-                if (r < 0)
-                        return r;
-        }
-
-        /* Then, add the per-link servers and domains */
-        HASHMAP_FOREACH(l, m->links, i) {
-                char **domain;
-
-                LIST_FOREACH(servers, s, l->dns_servers) {
-                        r = set_put(dns, s);
-                        if (r == -EEXIST)
-                                continue;
-                        if (r < 0)
-                                return r;
-                }
-
-                if (!l->unicast_scope)
-                        continue;
-
-                STRV_FOREACH(domain, l->unicast_scope->domains) {
-                        r = set_put(domains, *domain);
-                        if (r == -EEXIST)
-                                continue;
-                        if (r < 0)
-                                return r;
-                }
-        }
-
-        /* If we found nothing, add the fallback servers */
-        if (set_isempty(dns)) {
-                LIST_FOREACH(servers, s, m->fallback_dns_servers) {
-                        r = set_put(dns, s);
-                        if (r == -EEXIST)
-                                continue;
-                        if (r < 0)
-                                return r;
-                }
-        }
-
-        r = fopen_temporary_label(path, path, &f, &temp_path);
-        if (r < 0)
-                return r;
-
-        fchmod(fileno(f), 0644);
-
-        r = write_resolv_conf_contents(f, dns, domains);
-        if (r < 0)
-                goto fail;
-
-        if (rename(temp_path, path) < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        return 0;
-
-fail:
-        unlink(path);
-        unlink(temp_path);
-        return r;
-}
-
-int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) {
-        _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;
-        union {
-                struct cmsghdr header; /* For alignment */
-                uint8_t buffer[CMSG_SPACE(MAXSIZE(struct in_pktinfo, struct in6_pktinfo))
-                               + CMSG_SPACE(int) /* ttl/hoplimit */
-                               + EXTRA_CMSG_SPACE /* kernel appears to require extra buffer space */];
-        } control;
-        union sockaddr_union sa;
-        struct msghdr mh = {};
-        struct cmsghdr *cmsg;
-        struct iovec iov;
-        int ms = 0, r;
-        ssize_t l;
-
-        assert(m);
-        assert(fd >= 0);
-        assert(ret);
-
-        r = ioctl(fd, FIONREAD, &ms);
-        if (r < 0)
-                return -errno;
-        if (ms < 0)
-                return -EIO;
-
-        r = dns_packet_new(&p, protocol, ms);
-        if (r < 0)
-                return r;
-
-        iov.iov_base = DNS_PACKET_DATA(p);
-        iov.iov_len = p->allocated;
-
-        mh.msg_name = &sa.sa;
-        mh.msg_namelen = sizeof(sa);
-        mh.msg_iov = &iov;
-        mh.msg_iovlen = 1;
-        mh.msg_control = &control;
-        mh.msg_controllen = sizeof(control);
-
-        l = recvmsg(fd, &mh, 0);
-        if (l < 0) {
-                if (errno == EAGAIN || errno == EINTR)
-                        return 0;
-
-                return -errno;
-        }
-
-        if (l <= 0)
-                return -EIO;
-
-        assert(!(mh.msg_flags & MSG_CTRUNC));
-        assert(!(mh.msg_flags & MSG_TRUNC));
-
-        p->size = (size_t) l;
-
-        p->family = sa.sa.sa_family;
-        p->ipproto = IPPROTO_UDP;
-        if (p->family == AF_INET) {
-                p->sender.in = sa.in.sin_addr;
-                p->sender_port = be16toh(sa.in.sin_port);
-        } else if (p->family == AF_INET6) {
-                p->sender.in6 = sa.in6.sin6_addr;
-                p->sender_port = be16toh(sa.in6.sin6_port);
-                p->ifindex = sa.in6.sin6_scope_id;
-        } else
-                return -EAFNOSUPPORT;
-
-        for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {
-
-                if (cmsg->cmsg_level == IPPROTO_IPV6) {
-                        assert(p->family == AF_INET6);
-
-                        switch (cmsg->cmsg_type) {
-
-                        case IPV6_PKTINFO: {
-                                struct in6_pktinfo *i = (struct in6_pktinfo*) CMSG_DATA(cmsg);
-
-                                if (p->ifindex <= 0)
-                                        p->ifindex = i->ipi6_ifindex;
-
-                                p->destination.in6 = i->ipi6_addr;
-                                break;
-                        }
-
-                        case IPV6_HOPLIMIT:
-                                p->ttl = *(int *) CMSG_DATA(cmsg);
-                                break;
-
-                        }
-                } else if (cmsg->cmsg_level == IPPROTO_IP) {
-                        assert(p->family == AF_INET);
-
-                        switch (cmsg->cmsg_type) {
-
-                        case IP_PKTINFO: {
-                                struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg);
-
-                                if (p->ifindex <= 0)
-                                        p->ifindex = i->ipi_ifindex;
-
-                                p->destination.in = i->ipi_addr;
-                                break;
-                        }
-
-                        case IP_TTL:
-                                p->ttl = *(int *) CMSG_DATA(cmsg);
-                                break;
-                        }
-                }
-        }
-
-        /* The Linux kernel sets the interface index to the loopback
-         * device if the packet came from the local host since it
-         * avoids the routing table in such a case. Let's unset the
-         * interface index in such a case. */
-        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);
-
-        *ret = p;
-        p = NULL;
-
-        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;
-        int r;
-
-        r = manager_recv(m, fd, DNS_PROTOCOL_DNS, &p);
-        if (r <= 0)
-                return r;
-
-        if (dns_packet_validate_reply(p) > 0) {
-                t = hashmap_get(m->dns_transactions, UINT_TO_PTR(DNS_PACKET_ID(p)));
-                if (!t)
-                        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;
-
-        m->dns_ipv6_fd = socket(AF_INET6, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
-        if (m->dns_ipv6_fd < 0)
-                return -errno;
-
-        r = setsockopt(m->dns_ipv6_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));
-        if (r < 0) {
-                r = -errno;
-                goto fail;
-        }
-
-        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) {
-        int r;
-
-        assert(fd >= 0);
-        assert(mh);
-
-        for (;;) {
-                if (sendmsg(fd, mh, flags) >= 0)
-                        return 0;
-
-                if (errno == EINTR)
-                        continue;
-
-                if (errno != EAGAIN)
-                        return -errno;
-
-                r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC);
-                if (r < 0)
-                        return r;
-                if (r == 0)
-                        return -ETIMEDOUT;
-        }
-}
-
-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,
-        };
-        union {
-                struct cmsghdr header; /* For alignment */
-                uint8_t buffer[CMSG_SPACE(sizeof(struct in_pktinfo))];
-        } control;
-        struct msghdr mh = {};
-        struct iovec iov;
-
-        assert(m);
-        assert(fd >= 0);
-        assert(addr);
-        assert(port > 0);
-        assert(p);
-
-        iov.iov_base = DNS_PACKET_DATA(p);
-        iov.iov_len = p->size;
-
-        sa.in.sin_addr = *addr;
-        sa.in.sin_port = htobe16(port),
-
-        mh.msg_iov = &iov;
-        mh.msg_iovlen = 1;
-        mh.msg_name = &sa.sa;
-        mh.msg_namelen = sizeof(sa.in);
-
-        if (ifindex > 0) {
-                struct cmsghdr *cmsg;
-                struct in_pktinfo *pi;
-
-                zero(control);
-
-                mh.msg_control = &control;
-                mh.msg_controllen = CMSG_LEN(sizeof(struct in_pktinfo));
-
-                cmsg = CMSG_FIRSTHDR(&mh);
-                cmsg->cmsg_len = mh.msg_controllen;
-                cmsg->cmsg_level = IPPROTO_IP;
-                cmsg->cmsg_type = IP_PKTINFO;
-
-                pi = (struct in_pktinfo*) CMSG_DATA(cmsg);
-                pi->ipi_ifindex = ifindex;
-        }
-
-        return sendmsg_loop(fd, &mh, 0);
-}
-
-static int manager_ipv6_send(Manager *m, int fd, int ifindex, const struct in6_addr *addr, uint16_t port, DnsPacket *p) {
-        union sockaddr_union sa = {
-                .in6.sin6_family = AF_INET6,
-        };
-        union {
-                struct cmsghdr header; /* For alignment */
-                uint8_t buffer[CMSG_SPACE(sizeof(struct in6_pktinfo))];
-        } control;
-        struct msghdr mh = {};
-        struct iovec iov;
-
-        assert(m);
-        assert(fd >= 0);
-        assert(addr);
-        assert(port > 0);
-        assert(p);
-
-        iov.iov_base = DNS_PACKET_DATA(p);
-        iov.iov_len = p->size;
-
-        sa.in6.sin6_addr = *addr;
-        sa.in6.sin6_port = htobe16(port),
-        sa.in6.sin6_scope_id = ifindex;
-
-        mh.msg_iov = &iov;
-        mh.msg_iovlen = 1;
-        mh.msg_name = &sa.sa;
-        mh.msg_namelen = sizeof(sa.in6);
-
-        if (ifindex > 0) {
-                struct cmsghdr *cmsg;
-                struct in6_pktinfo *pi;
-
-                zero(control);
-
-                mh.msg_control = &control;
-                mh.msg_controllen = CMSG_LEN(sizeof(struct in6_pktinfo));
-
-                cmsg = CMSG_FIRSTHDR(&mh);
-                cmsg->cmsg_len = mh.msg_controllen;
-                cmsg->cmsg_level = IPPROTO_IPV6;
-                cmsg->cmsg_type = IPV6_PKTINFO;
-
-                pi = (struct in6_pktinfo*) CMSG_DATA(cmsg);
-                pi->ipi6_ifindex = ifindex;
-        }
-
-        return sendmsg_loop(fd, &mh, 0);
-}
-
-int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p) {
-        assert(m);
-        assert(fd >= 0);
-        assert(addr);
-        assert(port > 0);
-        assert(p);
-
-        log_debug("Sending %s packet with id %u on interface %i/%s", DNS_PACKET_QR(p) ? "response" : "query", DNS_PACKET_ID(p), ifindex, af_to_name(family));
-
-        if (family == AF_INET)
-                return manager_ipv4_send(m, fd, ifindex, &addr->in, port, p);
-        else if (family == AF_INET6)
-                return manager_ipv6_send(m, fd, ifindex, &addr->in6, port, p);
-
-        return -EAFNOSUPPORT;
-}
-
-DnsServer* manager_find_dns_server(Manager *m, int family, const union in_addr_union *in_addr) {
-        DnsServer *s;
-
-        assert(m);
-        assert(in_addr);
-
-        LIST_FOREACH(servers, s, m->dns_servers)
-                if (s->family == family && in_addr_equal(family, &s->address, in_addr) > 0)
-                        return s;
-
-        LIST_FOREACH(servers, s, m->fallback_dns_servers)
-                if (s->family == family && in_addr_equal(family, &s->address, in_addr) > 0)
-                        return s;
-
-        return NULL;
-}
-
-DnsServer *manager_set_dns_server(Manager *m, DnsServer *s) {
-        assert(m);
-
-        if (m->current_dns_server == s)
-                return s;
-
-        if (s) {
-                _cleanup_free_ char *ip = NULL;
-
-                in_addr_to_string(s->family, &s->address, &ip);
-                log_info("Switching to system DNS server %s.", strna(ip));
-        }
-
-        m->current_dns_server = s;
-
-        if (m->unicast_scope)
-                dns_cache_flush(&m->unicast_scope->cache);
-
-        return s;
-}
-
-DnsServer *manager_get_dns_server(Manager *m) {
-        Link *l;
-        assert(m);
-
-        /* Try to read updates resolv.conf */
-        manager_read_resolv_conf(m);
-
-        if (!m->current_dns_server)
-                manager_set_dns_server(m, m->dns_servers);
-
-        if (!m->current_dns_server) {
-                bool found = false;
-                Iterator i;
-
-                /* No DNS servers configured, let's see if there are
-                 * any on any links. If not, we use the fallback
-                 * servers */
-
-                HASHMAP_FOREACH(l, m->links, i)
-                        if (l->dns_servers) {
-                                found = true;
-                                break;
-                        }
-
-                if (!found)
-                        manager_set_dns_server(m, m->fallback_dns_servers);
-        }
-
-        return m->current_dns_server;
-}
-
-void manager_next_dns_server(Manager *m) {
-        assert(m);
-
-        /* If there's currently no DNS server set, then the next
-         * manager_get_dns_server() will find one */
-        if (!m->current_dns_server)
-                return;
-
-        /* Change to the next one */
-        if (m->current_dns_server->servers_next) {
-                manager_set_dns_server(m, m->current_dns_server->servers_next);
-                return;
-        }
-
-        /* If there was no next one, then start from the beginning of
-         * the list */
-        if (m->current_dns_server->type == DNS_SERVER_FALLBACK)
-                manager_set_dns_server(m, m->fallback_dns_servers);
-        else
-                manager_set_dns_server(m, m->dns_servers);
-}
-
-uint32_t manager_find_mtu(Manager *m) {
-        uint32_t mtu = 0;
-        Link *l;
-        Iterator i;
-
-        /* If we don't know on which link a DNS packet would be
-         * delivered, let's find the largest MTU that works on all
-         * interfaces we know of */
-
-        HASHMAP_FOREACH(l, m->links, i) {
-                if (l->mtu <= 0)
-                        continue;
-
-                if (mtu <= 0 || l->mtu < mtu)
-                        mtu = l->mtu;
-        }
-
-        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;
-
-        assert(m);
-
-        a = manager_find_link_address(m, family, in_addr);
-        if (a)
-                return a->link->ifindex;
-
-        return 0;
-}
-
-void manager_refresh_rrs(Manager *m) {
-        Iterator i;
-        Link *l;
-
-        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);
-
-        HASHMAP_FOREACH(l, m->links, i) {
-                link_add_rrs(l, true);
-                link_add_rrs(l, false);
-        }
-}
-
-int manager_next_hostname(Manager *m) {
-        const char *p;
-        uint64_t u, a;
-        char *h;
-
-        assert(m);
-
-        p = strchr(m->hostname, 0);
-        assert(p);
-
-        while (p > m->hostname) {
-                if (!strchr("0123456789", p[-1]))
-                        break;
-
-                p--;
-        }
-
-        if (*p == 0 || safe_atou64(p, &u) < 0 || u <= 0)
-                u = 1;
-
-        /* Add a random number to the old value. This way we can avoid
-         * that two hosts pick the same hostname, win on IPv4 and lose
-         * on IPv6 (or vice versa), and pick the same hostname
-         * replacement hostname, ad infinitum. We still want the
-         * numbers to go up monotonically, hence we just add a random
-         * value 1..10 */
-
-        random_bytes(&a, sizeof(a));
-        u += 1 + a % 10;
-
-        if (asprintf(&h, "%.*s%" PRIu64, (int) (p - m->hostname), m->hostname, u) < 0)
-                return -ENOMEM;
-
-        log_info("Hostname conflict, changing published hostname from '%s' to '%s'.", m->hostname, h);
-
-        free(m->hostname);
-        m->hostname = h;
-
-        manager_refresh_rrs(m);
-
-        return 0;
-}
-
-LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr) {
-        Iterator i;
-        Link *l;
-
-        assert(m);
-
-        HASHMAP_FOREACH(l, m->links, i) {
-                LinkAddress *a;
-
-                a = link_find_address(l, family, in_addr);
-                if (a)
-                        return a;
-        }
-
-        return NULL;
-}
-
-bool manager_our_packet(Manager *m, DnsPacket *p) {
-        assert(m);
-        assert(p);
-
-        return !!manager_find_link_address(m, p->family, &p->sender);
-}
-
-DnsScope* manager_find_scope(Manager *m, DnsPacket *p) {
-        Link *l;
-
-        assert(m);
-        assert(p);
-
-        l = hashmap_get(m->links, INT_TO_PTR(p->ifindex));
-        if (!l)
-                return NULL;
-
-        if (p->protocol == DNS_PROTOCOL_LLMNR) {
-                if (p->family == AF_INET)
-                        return l->llmnr_ipv4_scope;
-                else if (p->family == AF_INET6)
-                        return l->llmnr_ipv6_scope;
-        }
-
-        return NULL;
-}
-
-void manager_verify_all(Manager *m) {
-        DnsScope *s;
-
-        assert(m);
-
-        LIST_FOREACH(scopes, s, m->dns_scopes)
-                dns_zone_verify_all(&s->zone);
-}
-
-void manager_flush_dns_servers(Manager *m, DnsServerType t) {
-        assert(m);
-
-        if (t == DNS_SERVER_SYSTEM)
-                while (m->dns_servers)
-                        dns_server_free(m->dns_servers);
-
-        if (t == DNS_SERVER_FALLBACK)
-                while (m->fallback_dns_servers)
-                        dns_server_free(m->fallback_dns_servers);
-}
-
-static const char* const support_table[_SUPPORT_MAX] = {
-        [SUPPORT_NO] = "no",
-        [SUPPORT_YES] = "yes",
-        [SUPPORT_RESOLVE] = "resolve",
-};
-DEFINE_STRING_TABLE_LOOKUP(support, Support);