git.meshlink.io Git - catta/blob - avahi-daemon/dbus-async-host-name-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_host_name_resolver_free(AsyncHostNameResolverInfo *i) {
  35     assert(i);
  36
  37     if (i->host_name_resolver)
  38         avahi_s_host_name_resolver_free(i->host_name_resolver);
  39
  40     if (i->path) {
  41         dbus_connection_unregister_object_path(server->bus, i->path);
  42         avahi_free(i->path);
  43     }
  44     AVAHI_LLIST_REMOVE(AsyncHostNameResolverInfo, async_host_name_resolvers, i->client->async_host_name_resolvers, i);
  45
  46     i->client->n_objects--;
  47     assert(i->client->n_objects >= 0);
  48
  49     avahi_free(i);
  50 }
  51
  52 void avahi_dbus_async_host_name_resolver_callback(AvahiSHostNameResolver *r, AvahiIfIndex interface, AvahiProtocol protocol, AvahiResolverEvent event, const char *host_name, const AvahiAddress *a, AvahiLookupResultFlags flags, void* userdata) {
  53     AsyncHostNameResolverInfo *i = userdata;
  54     DBusMessage *reply;
  55
  56     assert(r);
  57     assert(i);
  58
  59     reply = dbus_message_new_signal(i->path, AVAHI_DBUS_INTERFACE_HOST_NAME_RESOLVER, avahi_dbus_map_resolve_signal_name(event));
  60
  61     if (event == AVAHI_RESOLVER_FOUND) {
  62         char t[AVAHI_ADDRESS_STR_MAX], *pt = t;
  63         int32_t i_interface, i_protocol, i_aprotocol;
  64         uint32_t u_flags;
  65
  66         assert(a);
  67         assert(host_name);
  68         avahi_address_snprint(t, sizeof(t), a);
  69
  70         i_interface = (int32_t) interface;
  71         i_protocol = (int32_t) protocol;
  72         i_aprotocol = (int32_t) a->proto;
  73         u_flags = (uint32_t) flags;
  74
  75         dbus_message_append_args(
  76             reply,
  77             DBUS_TYPE_INT32, &i_interface,
  78             DBUS_TYPE_INT32, &i_protocol,
  79             DBUS_TYPE_STRING, &host_name,
  80             DBUS_TYPE_INT32, &i_aprotocol,
  81             DBUS_TYPE_STRING, &pt,
  82             DBUS_TYPE_UINT32, &u_flags,
  83             DBUS_TYPE_INVALID);
  84     }  else {
  85         assert(event == AVAHI_RESOLVER_FAILURE);
  86         avahi_dbus_append_server_error(reply);
  87     }
  88
  89     dbus_message_set_destination(reply, i->client->name);
  90     dbus_connection_send(server->bus, reply, NULL);
  91     dbus_message_unref(reply);
  92 }
  93
  94 DBusHandlerResult avahi_dbus_msg_async_host_name_resolver_impl(DBusConnection *c, DBusMessage *m, void *userdata) {
  95     DBusError error;
  96     AsyncHostNameResolverInfo *i = userdata;
  97
  98     assert(c);
  99     assert(m);
 100     assert(i);
 101
 102     dbus_error_init(&error);
 103
 104     avahi_log_debug(__FILE__": interface=%s, path=%s, member=%s",
 105                     dbus_message_get_interface(m),
 106                     dbus_message_get_path(m),
 107                     dbus_message_get_member(m));
 108
 109     /* Introspection */
 110     if (dbus_message_is_method_call(m, DBUS_INTERFACE_INTROSPECTABLE, "Introspect"))
 111         return avahi_dbus_handle_introspect(c, m, "HostNameResolver.introspect");
 112
 113     /* Access control */
 114     if (strcmp(dbus_message_get_sender(m), i->client->name))
 115         return avahi_dbus_respond_error(c, m, AVAHI_ERR_ACCESS_DENIED, NULL);
 116
 117     if (dbus_message_is_method_call(m, AVAHI_DBUS_INTERFACE_HOST_NAME_RESOLVER, "Free")) {
 118
 119         if (!dbus_message_get_args(m, &error, DBUS_TYPE_INVALID)) {
 120             avahi_log_warn("Error parsing HostNameResolver::Free message");
 121             goto fail;
 122         }
 123
 124         avahi_dbus_async_host_name_resolver_free(i);
 125         return avahi_dbus_respond_ok(c, m);
 126     }
 127
 128     avahi_log_warn("Missed message %s::%s()", dbus_message_get_interface(m), dbus_message_get_member(m));
 129
 130 fail:
 131     if (dbus_error_is_set(&error))
 132         dbus_error_free(&error);
 133
 134     return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 135 }
 136