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/*
* Unix SMB/CIFS implementation.
* Register _smb._tcp with avahi
*
* Copyright (C) Volker Lendecke 2009
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "smbd/smbd.h"
#include <avahi-client/client.h>
#include <avahi-client/publish.h>
#include <avahi-common/error.h>
struct avahi_state_struct {
struct AvahiPoll *poll;
AvahiClient *client;
AvahiEntryGroup *entry_group;
uint16_t port;
};
static void avahi_entry_group_callback(AvahiEntryGroup *g,
AvahiEntryGroupState status,
void *userdata)
{
struct avahi_state_struct *state = talloc_get_type_abort(
userdata, struct avahi_state_struct);
int error;
switch (status) {
case AVAHI_ENTRY_GROUP_ESTABLISHED:
DEBUG(10, ("avahi_entry_group_callback: "
"AVAHI_ENTRY_GROUP_ESTABLISHED\n"));
break;
case AVAHI_ENTRY_GROUP_FAILURE:
error = avahi_client_errno(state->client);
DEBUG(10, ("avahi_entry_group_callback: "
"AVAHI_ENTRY_GROUP_FAILURE: %s\n",
avahi_strerror(error)));
break;
case AVAHI_ENTRY_GROUP_COLLISION:
DEBUG(10, ("avahi_entry_group_callback: "
"AVAHI_ENTRY_GROUP_COLLISION\n"));
break;
case AVAHI_ENTRY_GROUP_UNCOMMITED:
DEBUG(10, ("avahi_entry_group_callback: "
"AVAHI_ENTRY_GROUP_UNCOMMITED\n"));
break;
case AVAHI_ENTRY_GROUP_REGISTERING:
DEBUG(10, ("avahi_entry_group_callback: "
"AVAHI_ENTRY_GROUP_REGISTERING\n"));
break;
}
}
static void avahi_client_callback(AvahiClient *c, AvahiClientState status,
void *userdata)
{
struct avahi_state_struct *state = talloc_get_type_abort(
userdata, struct avahi_state_struct);
int error;
switch (status) {
case AVAHI_CLIENT_S_RUNNING:
DEBUG(10, ("avahi_client_callback: AVAHI_CLIENT_S_RUNNING\n"));
state->entry_group = avahi_entry_group_new(
c, avahi_entry_group_callback, state);
if (state->entry_group == NULL) {
error = avahi_client_errno(c);
DEBUG(10, ("avahi_entry_group_new failed: %s\n",
avahi_strerror(error)));
break;
}
if (avahi_entry_group_add_service(
state->entry_group, AVAHI_IF_UNSPEC,
AVAHI_PROTO_UNSPEC, 0, global_myname(),
"_smb._tcp", NULL, NULL, state->port, NULL) < 0) {
error = avahi_client_errno(c);
DEBUG(10, ("avahi_entry_group_add_service failed: "
"%s\n", avahi_strerror(error)));
avahi_entry_group_free(state->entry_group);
state->entry_group = NULL;
break;
}
if (avahi_entry_group_commit(state->entry_group) < 0) {
error = avahi_client_errno(c);
DEBUG(10, ("avahi_entry_group_commit failed: "
"%s\n", avahi_strerror(error)));
avahi_entry_group_free(state->entry_group);
state->entry_group = NULL;
break;
}
break;
case AVAHI_CLIENT_FAILURE:
error = avahi_client_errno(c);
DEBUG(10, ("avahi_client_callback: AVAHI_CLIENT_FAILURE: %s\n",
avahi_strerror(error)));
if (error != AVAHI_ERR_DISCONNECTED) {
break;
}
avahi_client_free(c);
state->client = avahi_client_new(state->poll, AVAHI_CLIENT_NO_FAIL,
avahi_client_callback, state,
&error);
if (state->client == NULL) {
DEBUG(10, ("avahi_client_new failed: %s\n",
avahi_strerror(error)));
break;
}
break;
case AVAHI_CLIENT_S_COLLISION:
DEBUG(10, ("avahi_client_callback: "
"AVAHI_CLIENT_S_COLLISION\n"));
break;
case AVAHI_CLIENT_S_REGISTERING:
DEBUG(10, ("avahi_client_callback: "
"AVAHI_CLIENT_S_REGISTERING\n"));
break;
case AVAHI_CLIENT_CONNECTING:
DEBUG(10, ("avahi_client_callback: "
"AVAHI_CLIENT_CONNECTING\n"));
break;
}
}
void *avahi_start_register(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
uint16_t port)
{
struct avahi_state_struct *state;
int error;
state = talloc(mem_ctx, struct avahi_state_struct);
if (state == NULL) {
return state;
}
state->port = port;
state->poll = tevent_avahi_poll(state, ev);
if (state->poll == NULL) {
goto fail;
}
state->client = avahi_client_new(state->poll, AVAHI_CLIENT_NO_FAIL,
avahi_client_callback, state,
&error);
if (state->client == NULL) {
DEBUG(10, ("avahi_client_new failed: %s\n",
avahi_strerror(error)));
goto fail;
}
return state;
fail:
TALLOC_FREE(state);
return NULL;
}
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