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/*
* camswclient.c - GStreamer softcam client
* Copyright (C) 2007 Alessandro Decina
*
* Authors:
* Alessandro Decina <alessandro@nnva.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <gst/gst.h>
#include "camswclient.h"
#include "cam.h"
#define GST_CAT_DEFAULT cam_debug_cat
#define UNIX_PATH_MAX 108
CamSwClient *
cam_sw_client_new (void)
{
CamSwClient *client = g_new0 (CamSwClient, 1);
client->state = CAM_SW_CLIENT_STATE_CLOSED;
return client;
}
static void
reset_state (CamSwClient * client)
{
if (client->sock)
close (client->sock);
if (client->sock_path)
g_free (client->sock_path);
}
void
cam_sw_client_free (CamSwClient * client)
{
g_return_if_fail (client != NULL);
if (client->state != CAM_SW_CLIENT_STATE_CLOSED)
GST_WARNING ("client not in CLOSED state when free'd");
reset_state (client);
g_free (client);
}
gboolean
cam_sw_client_open (CamSwClient * client, const char *sock_path)
{
struct sockaddr_un addr;
int ret;
g_return_val_if_fail (client != NULL, FALSE);
g_return_val_if_fail (client->state == CAM_SW_CLIENT_STATE_CLOSED, FALSE);
g_return_val_if_fail (sock_path != NULL, FALSE);
g_return_val_if_fail (strlen (sock_path) >= sizeof (addr.sun_path), FALSE);
addr.sun_family = AF_UNIX;
strncpy (addr.sun_path, sock_path, sizeof (addr.sun_path));
GST_INFO ("connecting to softcam socket: %s", sock_path);
if ((client->sock = socket (PF_UNIX, SOCK_STREAM, 0)) < 0) {
GST_ERROR ("Failed to create a socket, error: %s", g_strerror (errno));
return FALSE;
}
ret =
connect (client->sock, (struct sockaddr *) &addr,
sizeof (struct sockaddr_un));
if (ret != 0) {
GST_ERROR ("error opening softcam socket %s, error: %s",
sock_path, g_strerror (errno));
return FALSE;
}
client->sock_path = g_strdup (sock_path);
client->state = CAM_SW_CLIENT_STATE_OPEN;
return TRUE;
}
void
cam_sw_client_close (CamSwClient * client)
{
g_return_if_fail (client != NULL);
g_return_if_fail (client->state == CAM_SW_CLIENT_STATE_OPEN);
reset_state (client);
client->state = CAM_SW_CLIENT_STATE_CLOSED;
}
static void
send_ca_pmt (CamSwClient * client, GstMpegtsPMT * pmt,
guint8 list_management, guint8 cmd_id)
{
guint8 *buffer;
guint buffer_size;
guint8 *ca_pmt;
guint ca_pmt_size;
guint length_field_len;
guint header_len;
ca_pmt = cam_build_ca_pmt (pmt, list_management, cmd_id, &ca_pmt_size);
length_field_len = cam_calc_length_field_size (ca_pmt_size);
header_len = 3 + length_field_len;
buffer_size = header_len + ca_pmt_size;
buffer = g_malloc0 (buffer_size);
memcpy (buffer + header_len, ca_pmt, ca_pmt_size);
/* ca_pmt resource_id */
buffer[0] = 0x9F;
buffer[1] = 0x80;
buffer[2] = 0x32;
cam_write_length_field (&buffer[3], ca_pmt_size);
if (write (client->sock, buffer, buffer_size) == -1) {
GST_WARNING ("write failed when sending PMT with error: %s (%d)",
g_strerror (errno), errno);
}
g_free (ca_pmt);
g_free (buffer);
}
void
cam_sw_client_set_pmt (CamSwClient * client, GstMpegtsPMT * pmt)
{
g_return_if_fail (client != NULL);
g_return_if_fail (pmt != NULL);
return send_ca_pmt (client, pmt, 0x03 /* only */ ,
0x01 /* ok_descrambling */ );
}
void
cam_sw_client_update_pmt (CamSwClient * client, GstMpegtsPMT * pmt)
{
g_return_if_fail (client != NULL);
g_return_if_fail (pmt != NULL);
return send_ca_pmt (client, pmt, 0x05 /* update */ ,
0x01 /* ok_descrambling */ );
}
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