| 1 | /* $Id: sbuf.h 30045 2010-06-04 20:38:56Z vboxsync $ */
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| 2 | /** @file
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| 3 | * NAT - sbuf declarations/defines.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2010 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 | /*
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| 19 | * This code is based on:
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| 20 | *
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| 21 | * Copyright (c) 1995 Danny Gasparovski.
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| 22 | *
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| 23 | * Please read the file COPYRIGHT for the
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| 24 | * terms and conditions of the copyright.
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| 25 | */
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| 26 |
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| 27 | #ifndef _SBUF_H_
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| 28 | #define _SBUF_H_
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| 29 |
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| 30 | #ifndef VBOX_WITH_SLIRP_BSD_SBUF
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| 31 | # define sbflush(sb) sbdrop((sb),(sb)->sb_cc)
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| 32 | # define sbspace(sb) ((sb)->sb_datalen - (sb)->sb_cc)
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| 33 | # define SBUF_LEN(sb) ((sb)->sb_cc)
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| 34 | # define SBUF_SIZE(sb) ((sb)->sb_datalen)
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| 35 |
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| 36 |
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| 37 | struct sbuf
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| 38 | {
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| 39 | u_int sb_cc; /* actual chars in buffer */
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| 40 | u_int sb_datalen; /* Length of data */
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| 41 | char *sb_wptr; /* write pointer. points to where the next
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| 42 | * bytes should be written in the sbuf */
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| 43 | char *sb_rptr; /* read pointer. points to where the next
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| 44 | * byte should be read from the sbuf */
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| 45 | char *sb_data; /* Actual data */
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| 46 | };
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| 47 |
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| 48 | void sbfree (struct sbuf *);
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| 49 | void sbdrop (struct sbuf *, int);
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| 50 | void sbreserve (PNATState, struct sbuf *, int);
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| 51 | void sbappend (PNATState, struct socket *, struct mbuf *);
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| 52 | void sbappendsb (PNATState, struct sbuf *, struct mbuf *);
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| 53 | void sbcopy (struct sbuf *, int, int, char *);
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| 54 | #else
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| 55 | void sbappend (PNATState, struct socket *, struct mbuf *);
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| 56 | # include "bsd/sys/sbuf.h"
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| 57 | # define SBUF_LEN(sb) (sbuf_len(sb))
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| 58 | /* XXX: @todo SBUF_SIZE is a hack both space and SIZE shouldn't be used out of subr_sbuf.c*/
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| 59 | # define SBUF_SIZE(sb) ((sb)->s_size)
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| 60 | /* see subr_sbuf.c to verify the formula */
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| 61 | # define sbspace(sb) (SBUF_SIZE(sb) - SBUF_LEN((sb)) - 1)
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| 62 | #endif
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| 63 | #endif
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