diff options
Diffstat (limited to 'lib/libdvbapi/dvbca.c')
| -rw-r--r-- | lib/libdvbapi/dvbca.c | 159 |
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; +} |