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      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/avahi-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 }
    141