120 lines
4.0 KiB
C
120 lines
4.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
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* based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
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* Internet Initiative Japan, Inc (IIJ)
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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struct mbuf {
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size_t m_size; /* size allocated (excluding header) */
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u_short m_offset; /* offset from header end to start position */
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size_t m_len; /* available byte count in buffer */
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short m_type; /* MB_* below */
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struct mbuf *m_next; /* link to next mbuf */
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struct mbuf *m_nextpkt; /* link to next packet */
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unsigned long priv; /* private data - holds HDLC escape count */
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/* buffer space is malloc()d directly after the header */
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};
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struct mqueue {
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struct mbuf *top;
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struct mbuf *last;
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size_t len;
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};
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#define MBUF_CTOP(bp) \
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((bp) ? (u_char *)((bp)+1) + (bp)->m_offset : (u_char *)bp)
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#define CONST_MBUF_CTOP(bp) \
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((bp) ? (const u_char *)((bp)+1) + (bp)->m_offset : (const u_char *)bp)
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#define MB_IPIN 0
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#define MB_IPOUT 1
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#define MB_IPV6IN 2
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#define MB_IPV6OUT 3
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#define MB_NATIN 4
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#define MB_NATOUT 5
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#define MB_MPIN 6
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#define MB_MPOUT 7
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#define MB_VJIN 8
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#define MB_VJOUT 9
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#define MB_ICOMPDIN 10
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#define MB_ICOMPDOUT 11
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#define MB_COMPDIN 12
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#define MB_COMPDOUT 13
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#define MB_LQRIN 14
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#define MB_LQROUT 15
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#define MB_ECHOIN 16
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#define MB_ECHOOUT 17
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#define MB_PROTOIN 18
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#define MB_PROTOOUT 19
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#define MB_ACFIN 20
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#define MB_ACFOUT 21
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#define MB_SYNCIN 22
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#define MB_SYNCOUT 23
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#define MB_HDLCIN 24
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#define MB_HDLCOUT 25
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#define MB_ASYNCIN 26
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#define MB_ASYNCOUT 27
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#define MB_CBCPIN 28
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#define MB_CBCPOUT 29
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#define MB_CHAPIN 30
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#define MB_CHAPOUT 31
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#define MB_PAPIN 32
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#define MB_PAPOUT 33
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#define MB_CCPIN 34
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#define MB_CCPOUT 35
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#define MB_IPCPIN 36
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#define MB_IPCPOUT 37
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#define MB_IPV6CPIN 38
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#define MB_IPV6CPOUT 39
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#define MB_LCPIN 40
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#define MB_LCPOUT 41
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#define MB_UNKNOWN 42
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#define MB_MAX MB_UNKNOWN
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#define M_MAXLEN (4352 - sizeof(struct mbuf)) /* > HDLCSIZE */
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struct cmdargs;
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extern size_t m_length(struct mbuf *);
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extern struct mbuf *m_get(size_t, int);
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extern struct mbuf *m_free(struct mbuf *);
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extern void m_freem(struct mbuf *);
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extern void mbuf_Write(struct mbuf *, const void *, size_t);
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extern struct mbuf *mbuf_Read(struct mbuf *, void *, size_t);
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extern size_t mbuf_View(struct mbuf *, void *, size_t);
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extern struct mbuf *m_prepend(struct mbuf *, const void *, size_t, u_short);
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extern struct mbuf *m_adj(struct mbuf *, ssize_t);
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extern struct mbuf *m_pullup(struct mbuf *);
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extern void m_settype(struct mbuf *, int);
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extern struct mbuf *m_append(struct mbuf *, const void *, size_t);
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extern int mbuf_Show(struct cmdargs const *);
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extern void m_enqueue(struct mqueue *, struct mbuf *);
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extern struct mbuf *m_dequeue(struct mqueue *);
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