#include "resolved-bus.h"
#include "resolved-def.h"
#include "resolved-dns-synthesize.h"
+#include "resolved-dnssd.h"
+#include "resolved-dnssd-bus.h"
#include "resolved-link-bus.h"
+#include "utf8.h"
static int reply_query_state(DnsQuery *q) {
return sd_bus_reply_method_return(message, NULL);
}
+static int on_bus_track(sd_bus_track *t, void *userdata) {
+ DnssdService *s = userdata;
+
+ assert(t);
+ assert(s);
+
+ log_debug("Client of active request vanished, destroying DNS-SD service.");
+ dnssd_service_free(s);
+
+ return 0;
+}
+
+static int bus_method_register_service(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ _cleanup_(dnssd_service_freep) DnssdService *service = NULL;
+ _cleanup_(sd_bus_track_unrefp) sd_bus_track *bus_track = NULL;
+ _cleanup_free_ char *path = NULL;
+ _cleanup_free_ char *instance_name = NULL;
+ Manager *m = userdata;
+ DnssdService *s = NULL;
+ DnsTxtItem *last = NULL;
+ const char *name;
+ const char *name_template;
+ const char *type;
+ int r;
+
+ assert(message);
+ assert(m);
+
+ if (m->mdns_support != RESOLVE_SUPPORT_YES)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Support for MulticastDNS is disabled");
+
+ service = new0(DnssdService, 1);
+ if (!service)
+ return log_oom();
+
+ r = sd_bus_message_read(message, "sssqqq", &name, &name_template, &type,
+ &service->port, &service->priority,
+ &service->weight);
+ if (r < 0)
+ return r;
+
+ s = hashmap_get(m->dnssd_services, name);
+ if (s)
+ return sd_bus_error_setf(error, BUS_ERROR_DNSSD_SERVICE_EXISTS, "DNS-SD service '%s' exists already", name);
+
+ if (!dnssd_srv_type_is_valid(type))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "DNS-SD service type '%s' is invalid", type);
+
+ service->name = strdup(name);
+ if (!service->name)
+ return log_oom();
+
+ service->name_template = strdup(name_template);
+ if (!service->name_template)
+ return log_oom();
+
+ service->type = strdup(type);
+ if (!service->type)
+ return log_oom();
+
+ r = dnssd_render_instance_name(service, &instance_name);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_enter_container(message, SD_BUS_TYPE_ARRAY, "{say}");
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ while ((r = sd_bus_message_enter_container(message, SD_BUS_TYPE_DICT_ENTRY, "say")) > 0) {
+ const char *key;
+ const void *value;
+ size_t size;
+ DnsTxtItem *i;
+
+ r = sd_bus_message_read(message, "s", &key);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ if (strlen_ptr(key) == 0)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Keys in DNS-SD TXT RRs can't be empty");
+
+ if (!ascii_is_valid(key))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "TXT key '%s' contains non-ASCII symbols", key);
+
+ r = sd_bus_message_read_array(message, 'y', &value, &size);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ r = dnssd_txt_item_new_from_data(key, value, size, &i);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ LIST_INSERT_AFTER(items, service->txt, last, i);
+ last = i;
+ }
+
+ r = sd_bus_message_exit_container(message);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ if (!service->txt) {
+ r = dns_txt_item_new_empty(&service->txt);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+ }
+
+ r = sd_bus_path_encode("/org/freedesktop/resolve1/dnssd", service->name, &path);
+ if (r < 0)
+ return r;
+
+ r = hashmap_ensure_allocated(&m->dnssd_services, &string_hash_ops);
+ if (r < 0)
+ return r;
+
+ r = hashmap_put(m->dnssd_services, service->name, service);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_track_new(sd_bus_message_get_bus(message), &bus_track, on_bus_track, service);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_track_add_sender(bus_track, message);
+ if (r < 0)
+ return r;
+
+ service->manager = m;
+
+ service = NULL;
+
+ manager_refresh_rrs(m);
+
+ return sd_bus_reply_method_return(message, "o", path);
+}
+
+static int call_dnssd_method(Manager *m, sd_bus_message *message, sd_bus_message_handler_t handler, sd_bus_error *error) {
+ _cleanup_free_ char *name = NULL;
+ DnssdService *s = NULL;
+ const char *path;
+ int r;
+
+ assert(m);
+ assert(message);
+ assert(handler);
+
+ r = sd_bus_message_read(message, "o", &path);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_path_decode(path, "/org/freedesktop/resolve1/dnssd", &name);
+ if (r == 0)
+ return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_DNSSD_SERVICE, "DNS-SD service with object path '%s' does not exist", path);
+ if (r < 0)
+ return r;
+
+ s = hashmap_get(m->dnssd_services, name);
+ if (!s)
+ return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_DNSSD_SERVICE, "DNS-SD service '%s' not known", name);
+
+ return handler(message, s, error);
+}
+
+static int bus_method_unregister_service(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ Manager *m = userdata;
+
+ assert(message);
+ assert(m);
+
+ return call_dnssd_method(m, message, bus_dnssd_method_unregister, error);
+}
+
static const sd_bus_vtable resolve_vtable[] = {
SD_BUS_VTABLE_START(0),
SD_BUS_PROPERTY("LLMNRHostname", "s", NULL, offsetof(Manager, llmnr_hostname), 0),
SD_BUS_METHOD("SetLinkDNSSECNegativeTrustAnchors", "ias", NULL, bus_method_set_link_dnssec_negative_trust_anchors, 0),
SD_BUS_METHOD("RevertLink", "i", NULL, bus_method_revert_link, 0),
+ SD_BUS_METHOD("RegisterService", "sssqqqa{say}", "o", bus_method_register_service, 0),
+ SD_BUS_METHOD("UnregisterService", "o", NULL, bus_method_unregister_service, 0),
SD_BUS_VTABLE_END,
};
if (r < 0)
return log_error_errno(r, "Failed to register link enumerator: %m");
+ r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/resolve1/dnssd", "org.freedesktop.resolve1.DnssdService", dnssd_vtable, dnssd_object_find, m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to register dnssd objects: %m");
+
+ r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/resolve1/dnssd", dnssd_node_enumerator, m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to register dnssd enumerator: %m");
+
r = sd_bus_request_name(m->bus, "org.freedesktop.resolve1", 0);
if (r < 0)
return log_error_errno(r, "Failed to register name: %m");
--- /dev/null
+/***
+ This file is part of systemd.
+
+ Copyright 2017 Dmitry Rozhkov
+
+ 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 "alloc-util.h"
+#include "resolved-dnssd.h"
+#include "resolved-dnssd-bus.h"
+#include "resolved-link.h"
+#include "strv.h"
+
+int bus_dnssd_method_unregister(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ DnssdService *s = userdata;
+ Manager *m;
+ Iterator i;
+ Link *l;
+ int r;
+
+ assert(message);
+ assert(s);
+
+ m = s->manager;
+
+ HASHMAP_FOREACH(l, m->links, i) {
+ if (l->mdns_ipv4_scope) {
+ r = dns_scope_announce(l->mdns_ipv4_scope, true);
+ if (r < 0)
+ log_warning_errno(r, "Failed to send goodbye messages in IPv4 scope: %m");
+
+ dns_zone_remove_rr(&l->mdns_ipv4_scope->zone, s->ptr_rr);
+ dns_zone_remove_rr(&l->mdns_ipv4_scope->zone, s->srv_rr);
+ dns_zone_remove_rr(&l->mdns_ipv4_scope->zone, s->txt_rr);
+ }
+
+ if (l->mdns_ipv6_scope) {
+ r = dns_scope_announce(l->mdns_ipv6_scope, true);
+ if (r < 0)
+ log_warning_errno(r, "Failed to send goodbye messages in IPv6 scope: %m");
+
+ dns_zone_remove_rr(&l->mdns_ipv6_scope->zone, s->ptr_rr);
+ dns_zone_remove_rr(&l->mdns_ipv6_scope->zone, s->srv_rr);
+ dns_zone_remove_rr(&l->mdns_ipv6_scope->zone, s->txt_rr);
+ }
+ }
+
+ dnssd_service_free(s);
+
+ manager_refresh_rrs(m);
+
+ return sd_bus_reply_method_return(message, NULL);
+}
+
+const sd_bus_vtable dnssd_vtable[] = {
+ SD_BUS_VTABLE_START(0),
+
+ SD_BUS_METHOD("Unregister", NULL, NULL, bus_dnssd_method_unregister, 0),
+ SD_BUS_SIGNAL("Conflicted", NULL, 0),
+
+ SD_BUS_VTABLE_END
+};
+
+int dnssd_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
+ _cleanup_free_ char *name = NULL;
+ Manager *m = userdata;
+ DnssdService *service;
+ int r;
+
+ assert(bus);
+ assert(path);
+ assert(interface);
+ assert(found);
+ assert(m);
+
+ r = sd_bus_path_decode(path, "/org/freedesktop/resolve1/dnssd", &name);
+ if (r <= 0)
+ return 0;
+
+ service = hashmap_get(m->dnssd_services, name);
+ if (!service)
+ return 0;
+
+ *found = service;
+ return 1;
+}
+
+int dnssd_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
+ _cleanup_strv_free_ char **l = NULL;
+ Manager *m = userdata;
+ DnssdService *service;
+ Iterator i;
+ unsigned c = 0;
+ int r;
+
+ assert(bus);
+ assert(path);
+ assert(m);
+ assert(nodes);
+
+ l = new0(char*, hashmap_size(m->dnssd_services) + 1);
+ if (!l)
+ return -ENOMEM;
+
+ HASHMAP_FOREACH(service, m->dnssd_services, i) {
+ char *p;
+
+ r = sd_bus_path_encode("/org/freedesktop/resolve1/dnssd", service->name, &p);
+ if (r < 0)
+ return r;
+
+ l[c++] = p;
+ }
+
+ l[c] = NULL;
+ *nodes = l;
+ l = NULL;
+
+ return 1;
+}
projects / platform / upstream / systemd.git / commitdiff