Home | History | Annotate | Download | only in avahi-daemon 
      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_service_browser_free(ServiceBrowserInfo *i) {
     35     assert(i);
     36 
     37     if (i->service_browser)
     38         avahi_s_service_browser_free(i->service_browser);
     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(ServiceBrowserInfo, service_browsers, i->client->service_browsers, i);
     46 
     47     assert(i->client->n_objects >= 1);
     48     i->client->n_objects--;
     49 
     50     avahi_free(i);
     51 }
     52 
     53 DBusHandlerResult avahi_dbus_msg_service_browser_impl(DBusConnection *c, DBusMessage *m, void *userdata) {
     54     DBusError error;
     55     ServiceBrowserInfo *i = userdata;
     56 
     57     assert(c);
     58     assert(m);
     59     assert(i);
     60 
     61     dbus_error_init(&error);
     62 
     63     avahi_log_debug(__FILE__": interface=%s, path=%s, member=%s",
     64                     dbus_message_get_interface(m),
     65                     dbus_message_get_path(m),
     66                     dbus_message_get_member(m));
     67 
     68     /* Introspection */
     69     if (dbus_message_is_method_call(m, DBUS_INTERFACE_INTROSPECTABLE, "Introspect"))
     70         return avahi_dbus_handle_introspect(c, m, "org.freedesktop.Avahi.ServiceBrowser.xml");
     71 
     72     /* Access control */
     73     if (strcmp(dbus_message_get_sender(m), i->client->name))
     74         return avahi_dbus_respond_error(c, m, AVAHI_ERR_ACCESS_DENIED, NULL);
     75 
     76     if (dbus_message_is_method_call(m, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, "Free")) {
     77 
     78         if (!dbus_message_get_args(m, &error, DBUS_TYPE_INVALID)) {
     79             avahi_log_warn("Error parsing ServiceBrowser::Free message");
     80             goto fail;
     81         }
     82 
     83         avahi_dbus_service_browser_free(i);
     84         return avahi_dbus_respond_ok(c, m);
     85 
     86     }
     87 
     88     avahi_log_warn("Missed message %s::%s()", dbus_message_get_interface(m), dbus_message_get_member(m));
     89 
     90 fail:
     91     if (dbus_error_is_set(&error))
     92         dbus_error_free(&error);
     93 
     94     return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
     95 }
     96 
     97 void avahi_dbus_service_browser_callback(AvahiSServiceBrowser *b, AvahiIfIndex interface, AvahiProtocol protocol, AvahiBrowserEvent event, const char *name, const char *type, const char *domain, AvahiLookupResultFlags flags, void* userdata) {
     98     ServiceBrowserInfo *i = userdata;
     99     DBusMessage *m;
    100     int32_t i_interface, i_protocol;
    101     uint32_t u_flags;
    102 
    103     assert(b);
    104     assert(i);
    105 
    106     m = dbus_message_new_signal(i->path, AVAHI_DBUS_INTERFACE_SERVICE_BROWSER, avahi_dbus_map_browse_signal_name(event));
    107 
    108     if (!m) {
    109         avahi_log_error("Failed allocate message");
    110         return;
    111     }
    112 
    113     if (event == AVAHI_BROWSER_NEW) {
    114         /* Patch in AVAHI_LOOKUP_RESULT_OUR_OWN */
    115 
    116         if (avahi_dbus_is_our_own_service(i->client, interface, protocol, name, type, domain) > 0)
    117             flags |= AVAHI_LOOKUP_RESULT_OUR_OWN;
    118     }
    119 
    120     i_interface = (int32_t) interface;
    121     i_protocol = (int32_t) protocol;
    122     u_flags = (uint32_t) flags;
    123 
    124     if (event == AVAHI_BROWSER_NEW || event == AVAHI_BROWSER_REMOVE) {
    125         assert(name);
    126         assert(type);
    127         assert(domain);
    128 
    129         dbus_message_append_args(
    130             m,
    131             DBUS_TYPE_INT32, &i_interface,
    132             DBUS_TYPE_INT32, &i_protocol,
    133             DBUS_TYPE_STRING, &name,
    134             DBUS_TYPE_STRING, &type,
    135             DBUS_TYPE_STRING, &domain,
    136             DBUS_TYPE_UINT32, &u_flags,
    137             DBUS_TYPE_INVALID);
    138     } else if (event == AVAHI_BROWSER_FAILURE)
    139         avahi_dbus_append_server_error(m);
    140 
    141     dbus_message_set_destination(m, i->client->name);
    142     dbus_connection_send(server->bus, m, NULL);
    143     dbus_message_unref(m);
    144 }
    145