git.meshlink.io Git - catta/blob - avahi-daemon/dbus-async-service-resolver.c

   1 /***
   2   This file is part of avahi.
   3
   4   avahi is free software; you can redistribute it and/or modify it
   5   under the terms of the GNU Lesser General Public License as
   6   published by the Free Software Foundation; either version 2.1 of the
   7   License, or (at your option) any later version.
   8
   9   avahi is distributed in the hope that it will be useful, but WITHOUT
  10   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11   or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
  12   Public License for more details.
  13
  14   You should have received a copy of the GNU Lesser General Public
  15   License along with avahi; if not, write to the Free Software
  16   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  17   USA.
  18 ***/
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include <config.h>
  22 #endif
  23
  24 #include <string.h>
  25
  26 #include <avahi-common/malloc.h>
  27 #include <avahi-common/dbus.h>
  28 #include <avahi-common/error.h>
  29 #include <avahi-core/log.h>
  30
  31 #include "dbus-util.h"
  32 #include "dbus-internal.h"
  33
  34 void avahi_dbus_async_service_resolver_free(AsyncServiceResolverInfo *i) {
  35     assert(i);
  36
  37     if (i->service_resolver)
  38         avahi_s_service_resolver_free(i->service_resolver);
  39
  40     if (i->path) {
  41         dbus_connection_unregister_object_path(server->bus, i->path);
  42         avahi_free(i->path);
  43     }
  44
  45     AVAHI_LLIST_REMOVE(AsyncServiceResolverInfo, async_service_resolvers, i->client->async_service_resolvers, i);
  46
  47     assert(i->client->n_objects >= 1);
  48     i->client->n_objects--;
  49
  50     avahi_free(i);
  51 }
  52
  53 void avahi_dbus_async_service_resolver_callback(
  54     AvahiSServiceResolver *r,
  55     AvahiIfIndex interface,
  56     AvahiProtocol protocol,
  57     AvahiResolverEvent event,
  58     const char *name,
  59     const char *type,
  60     const char *domain,
  61     const char *host_name,
  62     const AvahiAddress *a,
  63     uint16_t port,
  64     AvahiStringList *txt,
  65     AvahiLookupResultFlags flags,
  66     void* userdata) {
  67
  68     AsyncServiceResolverInfo *i = userdata;
  69     DBusMessage *reply;
  70
  71     assert(r);
  72     assert(i);
  73
  74     reply = dbus_message_new_signal(i->path, AVAHI_DBUS_INTERFACE_SERVICE_RESOLVER, avahi_dbus_map_resolve_signal_name(event));
  75
  76     if (!reply) {
  77         avahi_log_error("Failed allocate message");
  78         return;
  79     }
  80
  81     if (event == AVAHI_RESOLVER_FOUND) {
  82         char t[AVAHI_ADDRESS_STR_MAX], *pt = t;
  83         int32_t i_interface, i_protocol, i_aprotocol;
  84         uint32_t u_flags;
  85
  86         assert(host_name);
  87
  88 /*         avahi_log_debug(__FILE__": [%s] Successfully resolved service <%s.%s.%s>", i->path, name, type, domain); */
  89
  90         if (a)
  91             avahi_address_snprint(t, sizeof(t), a);
  92         else
  93             t[0] = 0;
  94
  95         if (!name)
  96             name = "";
  97
  98         if (avahi_dbus_is_our_own_service(i->client, interface, protocol, name, type, domain) > 0)
  99             flags |= AVAHI_LOOKUP_RESULT_OUR_OWN;
 100
 101         i_interface = (int32_t) interface;
 102         i_protocol = (int32_t) protocol;
 103         if (a)
 104             i_aprotocol = (int32_t) a->proto;
 105         else
 106             i_aprotocol = AVAHI_PROTO_UNSPEC;
 107         u_flags = (uint32_t) flags;
 108
 109         dbus_message_append_args(
 110             reply,
 111             DBUS_TYPE_INT32, &i_interface,
 112             DBUS_TYPE_INT32, &i_protocol,
 113             DBUS_TYPE_STRING, &name,
 114             DBUS_TYPE_STRING, &type,
 115             DBUS_TYPE_STRING, &domain,
 116             DBUS_TYPE_STRING, &host_name,
 117             DBUS_TYPE_INT32, &i_aprotocol,
 118             DBUS_TYPE_STRING, &pt,
 119             DBUS_TYPE_UINT16, &port,
 120             DBUS_TYPE_INVALID);
 121
 122         avahi_dbus_append_string_list(reply, txt);
 123
 124         dbus_message_append_args(
 125             reply,
 126             DBUS_TYPE_UINT32, &u_flags,
 127             DBUS_TYPE_INVALID);
 128     }  else {
 129         assert(event == AVAHI_RESOLVER_FAILURE);
 130         avahi_dbus_append_server_error(reply);
 131     }
 132
 133     dbus_message_set_destination(reply, i->client->name);
 134     dbus_connection_send(server->bus, reply, NULL);
 135     dbus_message_unref(reply);
 136 }
 137
 138 DBusHandlerResult avahi_dbus_msg_async_service_resolver_impl(DBusConnection *c, DBusMessage *m, void *userdata) {
 139     DBusError error;
 140     AsyncServiceResolverInfo *i = userdata;
 141
 142     assert(c);
 143     assert(m);
 144     assert(i);
 145
 146     dbus_error_init(&error);
 147
 148     avahi_log_debug(__FILE__": interface=%s, path=%s, member=%s",
 149                     dbus_message_get_interface(m),
 150                     dbus_message_get_path(m),
 151                     dbus_message_get_member(m));
 152
 153     /* Introspection */
 154     if (dbus_message_is_method_call(m, DBUS_INTERFACE_INTROSPECTABLE, "Introspect"))
 155         return avahi_dbus_handle_introspect(c, m, "org.freedesktop.Avahi.ServiceResolver.xml");
 156
 157     /* Access control */
 158     if (strcmp(dbus_message_get_sender(m), i->client->name))
 159         return avahi_dbus_respond_error(c, m, AVAHI_ERR_ACCESS_DENIED, NULL);
 160
 161     if (dbus_message_is_method_call(m, AVAHI_DBUS_INTERFACE_SERVICE_RESOLVER, "Free")) {
 162
 163         if (!dbus_message_get_args(m, &error, DBUS_TYPE_INVALID)) {
 164             avahi_log_warn("Error parsing ServiceResolver::Free message");
 165             goto fail;
 166         }
 167
 168         avahi_dbus_async_service_resolver_free(i);
 169         return avahi_dbus_respond_ok(c, m);
 170     }
 171
 172     avahi_log_warn("Missed message %s::%s()", dbus_message_get_interface(m), dbus_message_get_member(m));
 173
 174 fail:
 175     if (dbus_error_is_set(&error))
 176         dbus_error_free(&error);
 177
 178     return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 179 }