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/*
*
* oFono - Open Source Telephony
*
* Copyright (C) 2009-2010 Nokia Corporation and/or its subsidiary(-ies).
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdint.h>
#include <glib.h>
#include "client.h"
#define VERSION_TIMEOUT 5
#define VERSION_RETRIES 2
#define COMMON_MESSAGE 0xF0
#define COMM_ISI_VERSION_GET_REQ 0x12
#define COMM_ISI_VERSION_GET_RESP 0x13
#define COMM_ISA_ENTITY_NOT_REACHABLE_RESP 0x14
struct verify_data {
GIsiVerifyFunc func;
void *data;
guint count;
uint8_t resource;
};
static GIsiRequest *send_version_query(GIsiClient *client, GIsiResponseFunc cb,
void *opaque)
{
struct verify_data *vd = opaque;
struct sockaddr_pn dst = {
.spn_family = AF_PHONET,
.spn_resource = vd->resource,
};
uint8_t msg[] = {
COMMON_MESSAGE,
COMM_ISI_VERSION_GET_REQ,
0x00 /* Filler */
};
return g_isi_sendto(client, &dst, msg, sizeof(msg), VERSION_TIMEOUT,
cb, opaque, NULL);
}
static gboolean verify_cb(GIsiClient *client, const void *restrict data,
size_t len, uint16_t object, void *opaque)
{
const uint8_t *msg = data;
struct verify_data *vd = opaque;
GIsiVerifyFunc func = vd->func;
gboolean alive = FALSE;
if (!msg) {
if (++vd->count < VERSION_RETRIES) {
g_warning("Retry COMM_ISI_VERSION_GET_REQ");
if (send_version_query(client, verify_cb, opaque))
return TRUE;
}
g_warning("Timeout COMM_ISI_VERSION_GET_REQ");
goto out;
}
if (len < 2 || msg[0] != COMMON_MESSAGE)
goto out;
if (msg[1] == COMM_ISI_VERSION_GET_RESP && len >= 4) {
if (vd->resource == g_isi_client_resource(client)) {
g_isi_version_set(client, msg[2], msg[3]);
g_isi_server_object_set(client, object);
}
alive = TRUE;
goto out;
}
if (msg[1] != COMM_ISA_ENTITY_NOT_REACHABLE_RESP)
alive = TRUE;
out:
if (func)
func(client, alive, object, vd->data);
g_free(vd);
return TRUE;
}
/**
* Verifies reachability of @a client with its resource. As a side
* effect of this liveliness check, the ISI version of the interface
* and the server object implementing the resource will be made
* available via g_isi_client_version() and g_isi_server_object(),
* respectively.
* @param client client to verify
* @param func callback to process outcome
* @param opaque user data
* @return NULL on error (see errno), GIsiRequest pointer on success.
*/
GIsiRequest *g_isi_verify(GIsiClient *client, GIsiVerifyFunc func,
void *opaque)
{
struct verify_data *data = g_try_new0(struct verify_data, 1);
GIsiRequest *req = NULL;
if (data == NULL)
return NULL;
data->func = func;
data->data = opaque;
data->resource = g_isi_client_resource(client);
req = send_version_query(client, verify_cb, data);
if (req == NULL)
g_free(data);
return req;
}
/**
* Verifies the reachability of an arbitrary resource.
* @param client client to verify
* @param func callback to process outcome
* @param opaque user data
* @return NULL on error (see errno), GIsiRequest pointer on success.
*/
GIsiRequest *g_isi_verify_resource(GIsiClient *client, uint8_t resource,
GIsiVerifyFunc func, void *opaque)
{
struct verify_data *data = g_try_new0(struct verify_data, 1);
GIsiRequest *req = NULL;
data->func = func;
data->data = opaque;
data->resource = resource;
req = send_version_query(client, verify_cb, data);
if (req == NULL)
g_free(data);
return req;
}
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