Imported Debian patch 1.1.1+rev1207-1debian/1.1.1+rev1207-1

1 files changed, 191 insertions, 0 deletions

diff --git a/lib/libdvben50221/en50221_app_ai.c b/lib/libdvben50221/en50221_app_ai.c
new file mode 100644
index 0000000..b7ded66
--- /dev/null
+++ b/lib/libdvben50221/en50221_app_ai.c
@@ -0,0 +1,191 @@
+/*
+    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 "en50221_app_ai.h"
+#include "en50221_app_tags.h"
+#include "asn_1.h"
+
+struct en50221_app_ai {
+	struct en50221_app_send_functions *funcs;
+
+	en50221_app_ai_callback callback;
+	void *callback_arg;
+
+	pthread_mutex_t lock;
+};
+
+static int en50221_app_ai_parse_app_info(struct en50221_app_ai *ai,
+					 uint8_t slot_id,
+					 uint16_t session_number,
+					 uint8_t * data,
+					 uint32_t data_length);
+
+
+struct en50221_app_ai *en50221_app_ai_create(struct en50221_app_send_functions *funcs)
+{
+	struct en50221_app_ai *ai = NULL;
+
+	// create structure and set it up
+	ai = malloc(sizeof(struct en50221_app_ai));
+	if (ai == NULL) {
+		return NULL;
+	}
+	ai->funcs = funcs;
+	ai->callback = NULL;
+
+	pthread_mutex_init(&ai->lock, NULL);
+
+	// done
+	return ai;
+}
+
+void en50221_app_ai_destroy(struct en50221_app_ai *ai)
+{
+	pthread_mutex_destroy(&ai->lock);
+	free(ai);
+}
+
+void en50221_app_ai_register_callback(struct en50221_app_ai *ai,
+				      en50221_app_ai_callback callback,
+				      void *arg)
+{
+	pthread_mutex_lock(&ai->lock);
+	ai->callback = callback;
+	ai->callback_arg = arg;
+	pthread_mutex_unlock(&ai->lock);
+}
+
+int en50221_app_ai_enquiry(struct en50221_app_ai *ai,
+			   uint16_t session_number)
+{
+	uint8_t data[4];
+
+	data[0] = (TAG_APP_INFO_ENQUIRY >> 16) & 0xFF;
+	data[1] = (TAG_APP_INFO_ENQUIRY >> 8) & 0xFF;
+	data[2] = TAG_APP_INFO_ENQUIRY & 0xFF;
+	data[3] = 0;
+
+	return ai->funcs->send_data(ai->funcs->arg, session_number, data, 4);
+}
+
+int en50221_app_ai_entermenu(struct en50221_app_ai *ai,
+			     uint16_t session_number)
+{
+	uint8_t data[4];
+
+	data[0] = (TAG_ENTER_MENU >> 16) & 0xFF;
+	data[1] = (TAG_ENTER_MENU >> 8) & 0xFF;
+	data[2] = TAG_ENTER_MENU & 0xFF;
+	data[3] = 0;
+
+	return ai->funcs->send_data(ai->funcs->arg, session_number, data, 4);
+}
+
+int en50221_app_ai_message(struct en50221_app_ai *ai,
+			   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];
+
+	switch (tag) {
+	case TAG_APP_INFO:
+		return en50221_app_ai_parse_app_info(ai, 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_ai_parse_app_info(struct en50221_app_ai *ai,
+					 uint8_t slot_id,
+					 uint16_t session_number,
+					 uint8_t * data,
+					 uint32_t data_length)
+{
+	// parse the length field
+	int length_field_len;
+	uint16_t asn_data_length;
+	if ((length_field_len = asn_1_decode(&asn_data_length, data, data_length)) < 0) {
+		print(LOG_LEVEL, ERROR, 1,
+		      "Received data with invalid length from module on slot %02x\n",
+		      slot_id);
+		return -1;
+	}
+	// check it
+	if (asn_data_length < 6) {
+		print(LOG_LEVEL, ERROR, 1, "Received short data\n");
+		return -1;
+	}
+	if (asn_data_length > (data_length - length_field_len)) {
+		print(LOG_LEVEL, ERROR, 1, "Received short data\n");
+		return -1;
+	}
+	uint8_t *app_info = data + length_field_len;
+
+	// parse the fields
+	uint8_t application_type = app_info[0];
+	uint16_t application_manufacturer = (app_info[1] << 8) | app_info[2];
+	uint16_t manufacturer_code = (app_info[3] << 8) | app_info[4];
+	uint8_t menu_string_length = app_info[5];
+	uint8_t *menu_string = app_info + 6;
+
+	// check the menu_string_length
+	if (menu_string_length > (asn_data_length - 6)) {
+		print(LOG_LEVEL, ERROR, 1,
+		      "Received bad menu string length - adjusting\n");
+		menu_string_length = asn_data_length - 6;
+	}
+	// tell the app
+	pthread_mutex_lock(&ai->lock);
+	en50221_app_ai_callback cb = ai->callback;
+	void *cb_arg = ai->callback_arg;
+	pthread_mutex_unlock(&ai->lock);
+	if (cb) {
+		return cb(cb_arg, slot_id, session_number,
+			  application_type, application_manufacturer,
+			  manufacturer_code, menu_string_length,
+			  menu_string);
+	}
+	return 0;
+}