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-rw-r--r--lib/libdvben50221/en50221_app_rm.c307
1 files changed, 307 insertions, 0 deletions
diff --git a/lib/libdvben50221/en50221_app_rm.c b/lib/libdvben50221/en50221_app_rm.c
new file mode 100644
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--- /dev/null
+++ b/lib/libdvben50221/en50221_app_rm.c
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+/*
+ en50221 encoder An implementation for libdvb
+ an implementation for the en50221 transport layer
+
+ Copyright (C) 2004, 2005 Manu Abraham <abraham.manu@gmail.com>
+ Copyright (C) 2005 Julian Scheel (julian at jusst dot de)
+ 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 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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#include <string.h>
+#include <libdvbmisc/dvbmisc.h>
+#include <pthread.h>
+#include <libucsi/endianops.h>
+#include "en50221_app_rm.h"
+#include "en50221_app_tags.h"
+#include "asn_1.h"
+
+struct en50221_app_rm {
+ struct en50221_app_send_functions *funcs;
+
+ en50221_app_rm_enq_callback enqcallback;
+ void *enqcallback_arg;
+
+ en50221_app_rm_reply_callback replycallback;
+ void *replycallback_arg;
+
+ en50221_app_rm_changed_callback changedcallback;
+ void *changedcallback_arg;
+
+ pthread_mutex_t lock;
+};
+
+static int en50221_app_rm_parse_profile_enq(struct en50221_app_rm *rm,
+ uint8_t slot_id,
+ uint16_t session_number,
+ uint8_t * data,
+ uint32_t data_length);
+static int en50221_app_rm_parse_profile_reply(struct en50221_app_rm *rm,
+ uint8_t slot_id,
+ uint16_t session_number,
+ uint8_t * data,
+ uint32_t data_length);
+static int en50221_app_rm_parse_profile_change(struct en50221_app_rm *rm,
+ uint8_t slot_id,
+ uint16_t session_number,
+ uint8_t * data,
+ uint32_t data_length);
+
+
+struct en50221_app_rm *en50221_app_rm_create(struct
+ en50221_app_send_functions
+ *funcs)
+{
+ struct en50221_app_rm *rm = NULL;
+
+ // create structure and set it up
+ rm = malloc(sizeof(struct en50221_app_rm));
+ if (rm == NULL) {
+ return NULL;
+ }
+ rm->funcs = funcs;
+ rm->enqcallback = NULL;
+ rm->replycallback = NULL;
+ rm->changedcallback = NULL;
+
+ pthread_mutex_init(&rm->lock, NULL);
+
+ // done
+ return rm;
+}
+
+void en50221_app_rm_destroy(struct en50221_app_rm *rm)
+{
+ pthread_mutex_destroy(&rm->lock);
+ free(rm);
+}
+
+void en50221_app_rm_register_enq_callback(struct en50221_app_rm *rm,
+ en50221_app_rm_enq_callback
+ callback, void *arg)
+{
+ pthread_mutex_lock(&rm->lock);
+ rm->enqcallback = callback;
+ rm->enqcallback_arg = arg;
+ pthread_mutex_unlock(&rm->lock);
+}
+
+void en50221_app_rm_register_reply_callback(struct en50221_app_rm *rm,
+ en50221_app_rm_reply_callback
+ callback, void *arg)
+{
+ pthread_mutex_lock(&rm->lock);
+ rm->replycallback = callback;
+ rm->replycallback_arg = arg;
+ pthread_mutex_unlock(&rm->lock);
+}
+
+void en50221_app_rm_register_changed_callback(struct en50221_app_rm *rm,
+ en50221_app_rm_changed_callback
+ callback, void *arg)
+{
+ pthread_mutex_lock(&rm->lock);
+ rm->changedcallback = callback;
+ rm->changedcallback_arg = arg;
+ pthread_mutex_unlock(&rm->lock);
+}
+
+int en50221_app_rm_enq(struct en50221_app_rm *rm, uint16_t session_number)
+{
+ uint8_t buf[4];
+
+ // set up the tag
+ buf[0] = (TAG_PROFILE_ENQUIRY >> 16) & 0xFF;
+ buf[1] = (TAG_PROFILE_ENQUIRY >> 8) & 0xFF;
+ buf[2] = TAG_PROFILE_ENQUIRY & 0xFF;
+ buf[3] = 0;
+
+ // create the data and send it
+ return rm->funcs->send_data(rm->funcs->arg, session_number, buf, 4);
+}
+
+int en50221_app_rm_reply(struct en50221_app_rm *rm,
+ uint16_t session_number,
+ uint32_t resource_id_count,
+ uint32_t * resource_ids)
+{
+ uint8_t buf[10];
+
+ // set up the tag
+ buf[0] = (TAG_PROFILE >> 16) & 0xFF;
+ buf[1] = (TAG_PROFILE >> 8) & 0xFF;
+ buf[2] = TAG_PROFILE & 0xFF;
+
+ // encode the length field
+ int length_field_len;
+ if ((length_field_len = asn_1_encode(resource_id_count * 4, buf + 3, 3)) < 0) {
+ return -1;
+ }
+ // copy the data and byteswap it
+ uint32_t *copy_resource_ids = alloca(4 * resource_id_count);
+ if (copy_resource_ids == NULL) {
+ return -1;
+ }
+ uint8_t *data = (uint8_t *) copy_resource_ids;
+ memcpy(data, resource_ids, resource_id_count * 4);
+ uint32_t i;
+ for (i = 0; i < resource_id_count; i++) {
+ bswap32(data);
+ data += 4;
+ }
+
+ // build the iovecs
+ struct iovec iov[2];
+ iov[0].iov_base = buf;
+ iov[0].iov_len = 3 + length_field_len;
+ iov[1].iov_base = (uint8_t *) copy_resource_ids;
+ iov[1].iov_len = resource_id_count * 4;
+
+ // create the data and send it
+ return rm->funcs->send_datav(rm->funcs->arg, session_number, iov, 2);
+}
+
+int en50221_app_rm_changed(struct en50221_app_rm *rm,
+ uint16_t session_number)
+{
+ uint8_t buf[4];
+
+ // set up the tag
+ buf[0] = (TAG_PROFILE_CHANGE >> 16) & 0xFF;
+ buf[1] = (TAG_PROFILE_CHANGE >> 8) & 0xFF;
+ buf[2] = TAG_PROFILE_CHANGE & 0xFF;
+ buf[3] = 0;
+
+ // create the data and send it
+ return rm->funcs->send_data(rm->funcs->arg, session_number, buf, 4);
+}
+
+int en50221_app_rm_message(struct en50221_app_rm *rm,
+ uint8_t slot_id,
+ uint16_t session_number,
+ uint32_t resource_id,
+ uint8_t * data, uint32_t data_length)
+{
+ (void) resource_id;
+
+ // get the tag
+ if (data_length < 3) {
+ print(LOG_LEVEL, ERROR, 1, "Received short data\n");
+ return -1;
+ }
+ uint32_t tag = (data[0] << 16) | (data[1] << 8) | data[2];
+
+ // dispatch it
+ switch (tag) {
+ case TAG_PROFILE_ENQUIRY:
+ return en50221_app_rm_parse_profile_enq(rm, slot_id,
+ session_number,
+ data + 3,
+ data_length - 3);
+ case TAG_PROFILE:
+ return en50221_app_rm_parse_profile_reply(rm, slot_id,
+ session_number,
+ data + 3,
+ data_length - 3);
+ case TAG_PROFILE_CHANGE:
+ return en50221_app_rm_parse_profile_change(rm, slot_id,
+ session_number,
+ data + 3,
+ data_length - 3);
+ }
+
+ print(LOG_LEVEL, ERROR, 1, "Received unexpected tag %x\n", tag);
+ return -1;
+}
+
+
+static int en50221_app_rm_parse_profile_enq(struct en50221_app_rm *rm,
+ uint8_t slot_id,
+ uint16_t session_number,
+ uint8_t * data,
+ uint32_t data_length)
+{
+ (void) data;
+ (void) data_length;
+
+ pthread_mutex_lock(&rm->lock);
+ en50221_app_rm_enq_callback cb = rm->enqcallback;
+ void *cb_arg = rm->enqcallback_arg;
+ pthread_mutex_unlock(&rm->lock);
+ if (cb) {
+ return cb(cb_arg, slot_id, session_number);
+ }
+ return 0;
+}
+
+static int en50221_app_rm_parse_profile_reply(struct en50221_app_rm *rm,
+ uint8_t slot_id,
+ uint16_t session_number,
+ uint8_t * data,
+ uint32_t data_length)
+{
+ // first of all, decode the length field
+ uint16_t asn_data_length;
+ int length_field_len;
+ if ((length_field_len = asn_1_decode(&asn_data_length, data, data_length)) < 0) {
+ print(LOG_LEVEL, ERROR, 1, "ASN.1 decode error\n");
+ return -1;
+ }
+ // check it
+ if (asn_data_length > (data_length - length_field_len)) {
+ print(LOG_LEVEL, ERROR, 1, "Received short data\n");
+ return -1;
+ }
+ uint32_t resources_count = asn_data_length / 4;
+ uint32_t *resource_ids = (uint32_t *) (data + length_field_len);
+ data += length_field_len;
+
+ // byteswap it
+ uint32_t i;
+ for (i = 0; i < resources_count; i++) {
+ bswap32(data);
+ data += 4;
+ }
+
+ // inform observer
+ pthread_mutex_lock(&rm->lock);
+ en50221_app_rm_reply_callback cb = rm->replycallback;
+ void *cb_arg = rm->replycallback_arg;
+ pthread_mutex_unlock(&rm->lock);
+ if (cb) {
+ return cb(cb_arg, slot_id, session_number, resources_count, resource_ids);
+ }
+ return 0;
+}
+
+static int en50221_app_rm_parse_profile_change(struct en50221_app_rm *rm,
+ uint8_t slot_id,
+ uint16_t session_number,
+ uint8_t * data,
+ uint32_t data_length)
+{
+ (void) data;
+ (void) data_length;
+
+ pthread_mutex_lock(&rm->lock);
+ en50221_app_rm_changed_callback cb = rm->changedcallback;
+ void *cb_arg = rm->changedcallback_arg;
+ pthread_mutex_unlock(&rm->lock);
+ if (cb) {
+ return cb(cb_arg, slot_id, session_number);
+ }
+ return 0;
+}
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