/* * Generic HDLC support routines for Linux * * Copyright (C) 1999-2003 Krzysztof Halasa <khc@pm.waw.pl> * * This program is free software; you can redistribute it and/or modify it * under the terms of version 2 of the GNU General Public License * as published by the Free Software Foundation. */#ifndef __HDLC_H#define __HDLC_H#define GENERIC_HDLC_VERSION 4	/* For synchronization with sethdlc utility */#define CLOCK_DEFAULT   0	/* Default setting */#define CLOCK_EXT	1	/* External TX and RX clock - DTE */#define CLOCK_INT	2	/* Internal TX and RX clock - DCE */#define CLOCK_TXINT	3	/* Internal TX and external RX clock */#define CLOCK_TXFROMRX	4	/* TX clock derived from external RX clock */#define ENCODING_DEFAULT	0 /* Default setting */#define ENCODING_NRZ		1#define ENCODING_NRZI		2#define ENCODING_FM_MARK	3#define ENCODING_FM_SPACE	4#define ENCODING_MANCHESTER	5#define PARITY_DEFAULT		0 /* Default setting */#define PARITY_NONE		1 /* No parity */#define PARITY_CRC16_PR0	2 /* CRC16, initial value 0x0000 */#define PARITY_CRC16_PR1	3 /* CRC16, initial value 0xFFFF */#define PARITY_CRC16_PR0_CCITT	4 /* CRC16, initial 0x0000, ITU-T version */#define PARITY_CRC16_PR1_CCITT	5 /* CRC16, initial 0xFFFF, ITU-T version */#define PARITY_CRC32_PR0_CCITT	6 /* CRC32, initial value 0x00000000 */#define PARITY_CRC32_PR1_CCITT	7 /* CRC32, initial value 0xFFFFFFFF */#define LMI_DEFAULT		0 /* Default setting */#define LMI_NONE		1 /* No LMI, all PVCs are static */#define LMI_ANSI		2 /* ANSI Annex D */#define LMI_CCITT		3 /* ITU-T Annex A */#define HDLC_MAX_MTU 1500	/* Ethernet 1500 bytes */#define HDLC_MAX_MRU (HDLC_MAX_MTU + 10 + 14 + 4) /* for ETH+VLAN over FR */#endif /* __HDLC_H */