Imported Upstream version 1.1.1+rev1207upstream/1.1.1+rev1207

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
index 0000000..7a5bc2f
--- /dev/null
+++ b/lib/libdvben50221/en50221_app_rm.c
@@ -0,0 +1,307 @@
+/*
+    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;
+}