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164 lines
4 KiB
C
164 lines
4 KiB
C
/*
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* camswclient.c - GStreamer softcam client
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* Copyright (C) 2007 Alessandro Decina
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*
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* Authors:
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* Alessandro Decina <alessandro@nnva.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <unistd.h>
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#include <gst/gst.h>
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#include "camswclient.h"
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#include "cam.h"
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#include "camutils.h"
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#define GST_CAT_DEFAULT cam_debug_cat
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#define UNIX_PATH_MAX 108
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CamSwClient *
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cam_sw_client_new (void)
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{
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CamSwClient *client = g_new0 (CamSwClient, 1);
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client->state = CAM_SW_CLIENT_STATE_CLOSED;
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return client;
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}
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static void
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reset_state (CamSwClient * client)
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{
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if (client->sock)
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close (client->sock);
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if (client->sock_path)
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g_free (client->sock_path);
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}
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void
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cam_sw_client_free (CamSwClient * client)
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{
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g_return_if_fail (client != NULL);
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if (client->state != CAM_SW_CLIENT_STATE_CLOSED)
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GST_WARNING ("client not in CLOSED state when free'd");
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reset_state (client);
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g_free (client);
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}
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gboolean
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cam_sw_client_open (CamSwClient * client, const char *sock_path)
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{
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struct sockaddr_un addr;
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int ret;
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g_return_val_if_fail (client != NULL, FALSE);
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g_return_val_if_fail (client->state == CAM_SW_CLIENT_STATE_CLOSED, FALSE);
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g_return_val_if_fail (sock_path != NULL, FALSE);
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addr.sun_family = AF_UNIX;
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strncpy (addr.sun_path, sock_path, UNIX_PATH_MAX);
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GST_INFO ("connecting to softcam socket: %s", sock_path);
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client->sock = socket (PF_UNIX, SOCK_STREAM, 0);
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ret =
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connect (client->sock, (struct sockaddr *) &addr,
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sizeof (struct sockaddr_un));
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if (ret != 0) {
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GST_ERROR ("error opening softcam socket %s, error: %s",
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sock_path, strerror (errno));
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return FALSE;
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}
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client->sock_path = g_strdup (sock_path);
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client->state = CAM_SW_CLIENT_STATE_OPEN;
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return TRUE;
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}
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void
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cam_sw_client_close (CamSwClient * client)
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{
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g_return_if_fail (client != NULL);
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g_return_if_fail (client->state == CAM_SW_CLIENT_STATE_OPEN);
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reset_state (client);
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client->state = CAM_SW_CLIENT_STATE_CLOSED;
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}
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static void
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send_ca_pmt (CamSwClient * client, GstStructure * pmt,
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guint8 list_management, guint8 cmd_id)
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{
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guint8 *buffer;
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guint buffer_size;
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guint8 *ca_pmt;
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guint ca_pmt_size;
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guint length_field_len;
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guint header_len;
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ca_pmt = cam_build_ca_pmt (pmt, list_management, cmd_id, &ca_pmt_size);
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length_field_len = cam_calc_length_field_size (ca_pmt_size);
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header_len = 3 + length_field_len;
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buffer_size = header_len + ca_pmt_size;
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buffer = g_malloc0 (buffer_size);
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memcpy (buffer + header_len, ca_pmt, ca_pmt_size);
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/* ca_pmt resource_id */
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buffer[0] = 0x9F;
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buffer[1] = 0x80;
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buffer[2] = 0x32;
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cam_write_length_field (&buffer[3], ca_pmt_size);
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if (write (client->sock, buffer, buffer_size) == -1) {
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GST_WARNING ("write failed when sending pmt with errno: %d", errno);
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}
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g_free (ca_pmt);
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g_free (buffer);
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}
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void
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cam_sw_client_set_pmt (CamSwClient * client, GstStructure * pmt)
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{
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g_return_if_fail (client != NULL);
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g_return_if_fail (pmt != NULL);
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return send_ca_pmt (client, pmt, 0x03 /* only */ ,
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0x01 /* ok_descrambling */ );
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}
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void
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cam_sw_client_update_pmt (CamSwClient * client, GstStructure * pmt)
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{
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g_return_if_fail (client != NULL);
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g_return_if_fail (pmt != NULL);
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return send_ca_pmt (client, pmt, 0x05 /* update */ ,
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0x01 /* ok_descrambling */ );
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}
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