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Diffstat (limited to 'freebsd/netatalk/ddp.h')
| -rw-r--r-- | freebsd/netatalk/ddp.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/freebsd/netatalk/ddp.h b/freebsd/netatalk/ddp.h new file mode 100644 index 00000000..f954b080 --- /dev/null +++ b/freebsd/netatalk/ddp.h @@ -0,0 +1,137 @@ +/*- + * Copyright (c) 1990, 1991 Regents of The University of Michigan. + * All Rights Reserved. + * + * Permission to use, copy, modify, and distribute this software and + * its documentation for any purpose and without fee is hereby granted, + * provided that the above copyright notice appears in all copies and + * that both that copyright notice and this permission notice appear + * in supporting documentation, and that the name of The University + * of Michigan not be used in advertising or publicity pertaining to + * distribution of the software without specific, written prior + * permission. This software is supplied as is without expressed or + * implied warranties of any kind. + * + * Research Systems Unix Group + * The University of Michigan + * c/o Mike Clark + * 535 W. William Street + * Ann Arbor, Michigan + * +1-313-763-0525 + * netatalk@itd.umich.edu + * + * $FreeBSD$ + */ + +#ifndef _NETATALK_DDP_HH_ +#define _NETATALK_DDP_HH_ + +/*- + * <-1byte(8bits) -> + * +---------------+ + * | 0 | hopc |len| + * +---------------+ + * | len (cont) | + * +---------------+ + * | | + * +- DDP csum -+ + * | | + * +---------------+ + * | | + * +- Dest NET -+ + * | | + * +---------------+ + * | | + * +- Src NET -+ + * | | + * +---------------+ + * | Dest NODE | + * +---------------+ + * | Src NODE | + * +---------------+ + * | Dest PORT | + * +---------------+ + * | Src PORT | + * +---------------+ + * + * On Apples, there is also a ddp_type field, after src_port. However, under + * this unix implementation, user level processes need to be able to set the + * ddp_type. In later revisions, the ddp_type may only be available in a + * raw_appletalk interface. + */ + +struct elaphdr { + u_char el_dnode; + u_char el_snode; + u_char el_type; +} __packed; + +#define SZ_ELAPHDR 3 + +#define ELAP_DDPSHORT 0x01 +#define ELAP_DDPEXTEND 0x02 + +/* + * Extended DDP header. Includes sickness for dealing with arbitrary + * bitfields on a little-endian arch. + */ +struct ddpehdr { + union { + struct { +#if BYTE_ORDER == BIG_ENDIAN + unsigned dub_pad:2; + unsigned dub_hops:4; + unsigned dub_len:10; + unsigned dub_sum:16; +#endif +#if BYTE_ORDER == LITTLE_ENDIAN + unsigned dub_sum:16; + unsigned dub_len:10; + unsigned dub_hops:4; + unsigned dub_pad:2; +#endif + } __packed du_bits; + unsigned du_bytes; + } deh_u; + u_short deh_dnet; + u_short deh_snet; + u_char deh_dnode; + u_char deh_snode; + u_char deh_dport; + u_char deh_sport; +} __packed; +#define deh_pad deh_u.du_bits.dub_pad +#define deh_hops deh_u.du_bits.dub_hops +#define deh_len deh_u.du_bits.dub_len +#define deh_sum deh_u.du_bits.dub_sum +#define deh_bytes deh_u.du_bytes + +#define DDP_MAXHOPS 15 + +struct ddpshdr { + union { + struct { +#if BYTE_ORDER == BIG_ENDIAN + unsigned dub_pad:6; + unsigned dub_len:10; + unsigned dub_dport:8; + unsigned dub_sport:8; +#endif +#if BYTE_ORDER == LITTLE_ENDIAN + unsigned dub_sport:8; + unsigned dub_dport:8; + unsigned dub_len:10; + unsigned dub_pad:6; +#endif + } __packed du_bits; + unsigned du_bytes; + } dsh_u; +} __packed; + +#define dsh_pad dsh_u.du_bits.dub_pad +#define dsh_len dsh_u.du_bits.dub_len +#define dsh_dport dsh_u.du_bits.dub_dport +#define dsh_sport dsh_u.du_bits.dub_sport +#define dsh_bytes dsh_u.du_bytes + +#endif /* _NETATALK_DDP_HH_ */ |