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     i->client->n_objects--;
  48     assert(i->client->n_objects >= 0);
  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 (event == AVAHI_RESOLVER_FOUND) {
  77         char t[AVAHI_ADDRESS_STR_MAX], *pt = t;
  78         int32_t i_interface, i_protocol, i_aprotocol;
  79         uint32_t u_flags;
  80
  81         assert(host_name);
  82
  83 /*         avahi_log_debug(__FILE__": [%s] Successfully resolved service <%s.%s.%s>", i->path, name, type, domain); */
  84
  85         if (a)
  86             avahi_address_snprint(t, sizeof(t), a);
  87         else
  88             t[0] = 0;
  89
  90         if (!name)
  91             name = "";
  92
  93         if (avahi_dbus_is_our_own_service(i->client, interface, protocol, name, type, domain) > 0)
  94             flags |= AVAHI_LOOKUP_RESULT_OUR_OWN;
  95
  96         i_interface = (int32_t) interface;
  97         i_protocol = (int32_t) protocol;
  98         if (a)
  99             i_aprotocol = (int32_t) a->proto;
 100         else
 101             i_aprotocol = AVAHI_PROTO_UNSPEC;
 102         u_flags = (uint32_t) flags;
 103
 104         dbus_message_append_args(
 105             reply,
 106             DBUS_TYPE_INT32, &i_interface,
 107             DBUS_TYPE_INT32, &i_protocol,
 108             DBUS_TYPE_STRING, &name,
 109             DBUS_TYPE_STRING, &type,
 110             DBUS_TYPE_STRING, &domain,
 111             DBUS_TYPE_STRING, &host_name,
 112             DBUS_TYPE_INT32, &i_aprotocol,
 113             DBUS_TYPE_STRING, &pt,
 114             DBUS_TYPE_UINT16, &port,
 115             DBUS_TYPE_INVALID);
 116
 117         avahi_dbus_append_string_list(reply, txt);
 118
 119         dbus_message_append_args(
 120             reply,
 121             DBUS_TYPE_UINT32, &u_flags,
 122             DBUS_TYPE_INVALID);
 123     }  else {
 124         assert(event == AVAHI_RESOLVER_FAILURE);
 125         avahi_dbus_append_server_error(reply);
 126     }
 127
 128     dbus_message_set_destination(reply, i->client->name);
 129     dbus_connection_send(server->bus, reply, NULL);
 130     dbus_message_unref(reply);
 131 }
 132
 133 DBusHandlerResult avahi_dbus_msg_async_service_resolver_impl(DBusConnection *c, DBusMessage *m, void *userdata) {
 134     DBusError error;
 135     AsyncServiceResolverInfo *i = userdata;
 136
 137     assert(c);
 138     assert(m);
 139     assert(i);
 140
 141     dbus_error_init(&error);
 142
 143     avahi_log_debug(__FILE__": interface=%s, path=%s, member=%s",
 144                     dbus_message_get_interface(m),
 145                     dbus_message_get_path(m),
 146                     dbus_message_get_member(m));
 147
 148     /* Introspection */
 149     if (dbus_message_is_method_call(m, DBUS_INTERFACE_INTROSPECTABLE, "Introspect"))
 150         return avahi_dbus_handle_introspect(c, m, "ServiceResolver.introspect");
 151
 152     /* Access control */
 153     if (strcmp(dbus_message_get_sender(m), i->client->name))
 154         return avahi_dbus_respond_error(c, m, AVAHI_ERR_ACCESS_DENIED, NULL);
 155
 156     if (dbus_message_is_method_call(m, AVAHI_DBUS_INTERFACE_SERVICE_RESOLVER, "Free")) {
 157
 158         if (!dbus_message_get_args(m, &error, DBUS_TYPE_INVALID)) {
 159             avahi_log_warn("Error parsing ServiceResolver::Free message");
 160             goto fail;
 161         }
 162
 163         avahi_dbus_async_service_resolver_free(i);
 164         return avahi_dbus_respond_ok(c, m);
 165     }
 166
 167     avahi_log_warn("Missed message %s::%s()", dbus_message_get_interface(m), dbus_message_get_member(m));
 168
 169 fail:
 170     if (dbus_error_is_set(&error))
 171         dbus_error_free(&error);
 172
 173     return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 174 }
 175