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authoretobi <git@e-tobi.net>2013-09-03 09:48:41 +0200
committeretobi <git@e-tobi.net>2013-09-03 09:48:41 +0200
commitab959d7b4194715870128e616b8e29d4a101e488 (patch)
tree61a746231d30817be73416a7d67763fd677a1042 /lib/libdvbapi/dvbca.c
parent6b350466c4902c5b137e0efaf1d189128a7f18f5 (diff)
downloadlinux-dvb-apps-ab959d7b4194715870128e616b8e29d4a101e488.tar.gz
Imported Upstream version 1.1.1+rev1207upstream/1.1.1+rev1207
Diffstat (limited to 'lib/libdvbapi/dvbca.c')
-rw-r--r--lib/libdvbapi/dvbca.c159
1 files changed, 159 insertions, 0 deletions
diff --git a/lib/libdvbapi/dvbca.c b/lib/libdvbapi/dvbca.c
new file mode 100644
index 0000000..8261cd2
--- /dev/null
+++ b/lib/libdvbapi/dvbca.c
@@ -0,0 +1,159 @@
+/*
+ * libdvbca - interface onto raw CA devices
+ *
+ * Copyright (C) 2006 Andrew de Quincey (adq_dvb@lidskialf.net)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <sys/param.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <errno.h>
+#include <linux/dvb/ca.h>
+#include "dvbca.h"
+
+
+int dvbca_open(int adapter, int cadevice)
+{
+ char filename[PATH_MAX+1];
+ int fd;
+
+ sprintf(filename, "/dev/dvb/adapter%i/ca%i", adapter, cadevice);
+ if ((fd = open(filename, O_RDWR)) < 0) {
+ // if that failed, try a flat /dev structure
+ sprintf(filename, "/dev/dvb%i.ca%i", adapter, cadevice);
+ fd = open(filename, O_RDWR);
+ }
+
+ return fd;
+}
+
+int dvbca_reset(int fd, uint8_t slot)
+{
+ return ioctl(fd, CA_RESET, (1 << slot));
+}
+
+int dvbca_get_interface_type(int fd, uint8_t slot)
+{
+ ca_slot_info_t info;
+
+ info.num = slot;
+ if (ioctl(fd, CA_GET_SLOT_INFO, &info))
+ return -1;
+
+ if (info.type & CA_CI_LINK)
+ return DVBCA_INTERFACE_LINK;
+ if (info.type & CA_CI)
+ return DVBCA_INTERFACE_HLCI;
+
+ return -1;
+}
+
+int dvbca_get_cam_state(int fd, uint8_t slot)
+{
+ ca_slot_info_t info;
+
+ info.num = slot;
+ if (ioctl(fd, CA_GET_SLOT_INFO, &info))
+ return -1;
+
+ if (info.flags == 0)
+ return DVBCA_CAMSTATE_MISSING;
+ if (info.flags & CA_CI_MODULE_READY)
+ return DVBCA_CAMSTATE_READY;
+ if (info.flags & CA_CI_MODULE_PRESENT)
+ return DVBCA_CAMSTATE_INITIALISING;
+
+ return -1;
+}
+
+int dvbca_link_write(int fd, uint8_t slot, uint8_t connection_id,
+ uint8_t *data, uint16_t data_length)
+{
+ uint8_t *buf = malloc(data_length + 2);
+ if (buf == NULL)
+ return -1;
+
+ buf[0] = slot;
+ buf[1] = connection_id;
+ memcpy(buf+2, data, data_length);
+
+ int result = write(fd, buf, data_length+2);
+ free(buf);
+ return result;
+}
+
+int dvbca_link_read(int fd, uint8_t *slot, uint8_t *connection_id,
+ uint8_t *data, uint16_t data_length)
+{
+ int size;
+
+ uint8_t *buf = malloc(data_length + 2);
+ if (buf == NULL)
+ return -1;
+
+ if ((size = read(fd, buf, data_length+2)) < 2)
+ return -1;
+
+ *slot = buf[0];
+ *connection_id = buf[1];
+ memcpy(data, buf+2, size-2);
+ free(buf);
+
+ return size - 2;
+}
+
+int dvbca_hlci_write(int fd, uint8_t *data, uint16_t data_length)
+{
+ struct ca_msg msg;
+
+ if (data_length > 256) {
+ return -1;
+ }
+ memset(&msg, 0, sizeof(msg));
+ msg.length = data_length;
+
+ memcpy(msg.msg, data, data_length);
+
+ return ioctl(fd, CA_SEND_MSG, &msg);
+}
+
+int dvbca_hlci_read(int fd, uint32_t app_tag, uint8_t *data,
+ uint16_t data_length)
+{
+ struct ca_msg msg;
+
+ if (data_length > 256) {
+ data_length = 256;
+ }
+ memset(&msg, 0, sizeof(msg));
+ msg.length = data_length;
+ msg.msg[0] = app_tag >> 16;
+ msg.msg[1] = app_tag >> 8;
+ msg.msg[2] = app_tag;
+
+ int status = ioctl(fd, CA_GET_MSG, &msg);
+ if (status < 0) return status;
+
+ if (msg.length > data_length) msg.length = data_length;
+ memcpy(data, msg.msg, msg.length);
+ return msg.length;
+}