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     assert(i->client->n_objects >= 1);
  47     i->client->n_objects--;
  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 (!reply) {
  62         avahi_log_error("Failed allocate message");
  63         return;
  64     }
  65
  66     if (event == AVAHI_RESOLVER_FOUND) {
  67         char t[AVAHI_ADDRESS_STR_MAX], *pt = t;
  68         int32_t i_interface, i_protocol, i_aprotocol;
  69         uint32_t u_flags;
  70
  71         assert(a);
  72         assert(host_name);
  73         avahi_address_snprint(t, sizeof(t), a);
  74
  75         i_interface = (int32_t) interface;
  76         i_protocol = (int32_t) protocol;
  77         i_aprotocol = (int32_t) a->proto;
  78         u_flags = (uint32_t) flags;
  79
  80         dbus_message_append_args(
  81             reply,
  82             DBUS_TYPE_INT32, &i_interface,
  83             DBUS_TYPE_INT32, &i_protocol,
  84             DBUS_TYPE_STRING, &host_name,
  85             DBUS_TYPE_INT32, &i_aprotocol,
  86             DBUS_TYPE_STRING, &pt,
  87             DBUS_TYPE_UINT32, &u_flags,
  88             DBUS_TYPE_INVALID);
  89     }  else {
  90         assert(event == AVAHI_RESOLVER_FAILURE);
  91         avahi_dbus_append_server_error(reply);
  92     }
  93
  94     dbus_message_set_destination(reply, i->client->name);
  95     dbus_connection_send(server->bus, reply, NULL);
  96     dbus_message_unref(reply);
  97 }
  98
  99 DBusHandlerResult avahi_dbus_msg_async_host_name_resolver_impl(DBusConnection *c, DBusMessage *m, void *userdata) {
 100     DBusError error;
 101     AsyncHostNameResolverInfo *i = userdata;
 102
 103     assert(c);
 104     assert(m);
 105     assert(i);
 106
 107     dbus_error_init(&error);
 108
 109     avahi_log_debug(__FILE__": interface=%s, path=%s, member=%s",
 110                     dbus_message_get_interface(m),
 111                     dbus_message_get_path(m),
 112                     dbus_message_get_member(m));
 113
 114     /* Introspection */
 115     if (dbus_message_is_method_call(m, DBUS_INTERFACE_INTROSPECTABLE, "Introspect"))
 116         return avahi_dbus_handle_introspect(c, m, "org.freedesktop.Avahi.HostNameResolver.xml");
 117
 118     /* Access control */
 119     if (strcmp(dbus_message_get_sender(m), i->client->name))
 120         return avahi_dbus_respond_error(c, m, AVAHI_ERR_ACCESS_DENIED, NULL);
 121
 122     if (dbus_message_is_method_call(m, AVAHI_DBUS_INTERFACE_HOST_NAME_RESOLVER, "Free")) {
 123
 124         if (!dbus_message_get_args(m, &error, DBUS_TYPE_INVALID)) {
 125             avahi_log_warn("Error parsing HostNameResolver::Free message");
 126             goto fail;
 127         }
 128
 129         avahi_dbus_async_host_name_resolver_free(i);
 130         return avahi_dbus_respond_ok(c, m);
 131     }
 132
 133     avahi_log_warn("Missed message %s::%s()", dbus_message_get_interface(m), dbus_message_get_member(m));
 134
 135 fail:
 136     if (dbus_error_is_set(&error))
 137         dbus_error_free(&error);
 138
 139     return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 140 }