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+/*
+ * Copyright (C) 2016 Paul Kocialkowski <contact@paulk.fr>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _HDLC_H_
+#define _HDLC_H_
+
+#include "lg-downloader.h"
+
+/*
+ * Values
+ */
+
+#define HDLC_FLAG 0x7e
+#define HDLC_ESCAPE 0x7d
+#define HDLC_ESCAPE_MASK 0x20
+
+#define HDLC_CRC_SEED 0xffff
+#define HDLC_CRC_FINAL 0xf0b8
+
+#define HDLC_MIN_SIZE 12
+#define HDLC_HEAD_SIZE 1
+#define HDLC_TAIL_SIZE 3
+
+/*
+ * Functions
+ */
+
+int hdlc_send(struct context *context, const void *data, unsigned int size);
+int hdlc_recv(struct context *context, void *data, unsigned int size);
+
+#endif