| 1 | /*
|
|---|
| 2 | * Copyright (c) 1982, 1986, 1988, 1993
|
|---|
| 3 | * The Regents of the University of California. All rights reserved.
|
|---|
| 4 | *
|
|---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | * modification, are permitted provided that the following conditions
|
|---|
| 7 | * are met:
|
|---|
| 8 | * 1. Redistributions of source code must retain the above copyright
|
|---|
| 9 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 10 | * 2. Redistributions in binary form must reproduce the above copyright
|
|---|
| 11 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 12 | * documentation and/or other materials provided with the distribution.
|
|---|
| 13 | * 3. All advertising materials mentioning features or use of this software
|
|---|
| 14 | * must display the following acknowledgement:
|
|---|
| 15 | * This product includes software developed by the University of
|
|---|
| 16 | * California, Berkeley and its contributors.
|
|---|
| 17 | * 4. Neither the name of the University nor the names of its contributors
|
|---|
| 18 | * may be used to endorse or promote products derived from this software
|
|---|
| 19 | * without specific prior written permission.
|
|---|
| 20 | *
|
|---|
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|---|
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|---|
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|---|
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|---|
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|---|
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|---|
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|---|
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|---|
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|---|
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|---|
| 31 | * SUCH DAMAGE.
|
|---|
| 32 | *
|
|---|
| 33 | * @(#)mbuf.h 8.3 (Berkeley) 1/21/94
|
|---|
| 34 | * mbuf.h,v 1.9 1994/11/14 13:54:20 bde Exp
|
|---|
| 35 | */
|
|---|
| 36 |
|
|---|
| 37 | #ifndef _MBUF_H_
|
|---|
| 38 | #define _MBUF_H_
|
|---|
| 39 |
|
|---|
| 40 | #ifndef VBOX_WITH_SLIRP_BSD_MBUF
|
|---|
| 41 | /* #define M_BUF_DEBUG */
|
|---|
| 42 |
|
|---|
| 43 | #define m_freem m_free
|
|---|
| 44 |
|
|---|
| 45 |
|
|---|
| 46 | #define MINCSIZE 4096 /* Amount to increase mbuf if too small */
|
|---|
| 47 |
|
|---|
| 48 | /*
|
|---|
| 49 | * Macros for type conversion
|
|---|
| 50 | * mtod(m,t) - convert mbuf pointer to data pointer of correct type
|
|---|
| 51 | * dtom(x) - convert data pointer within mbuf to mbuf pointer (XXX)
|
|---|
| 52 | */
|
|---|
| 53 | #define mtod(m,t) ((t)(m)->m_data)
|
|---|
| 54 | /* #define dtom(x) ((struct mbuf *)((int)(x) & ~(M_SIZE-1))) */
|
|---|
| 55 |
|
|---|
| 56 | /* XXX About mbufs for slirp:
|
|---|
| 57 | * Only one mbuf is ever used in a chain, for each "cell" of data.
|
|---|
| 58 | * m_nextpkt points to the next packet, if fragmented.
|
|---|
| 59 | * If the data is too large, the M_EXT is used, and a larger block
|
|---|
| 60 | * is alloced. Therefore, m_free[m] must check for M_EXT and if set
|
|---|
| 61 | * free the m_ext. This is inefficient memory-wise, but who cares.
|
|---|
| 62 | */
|
|---|
| 63 |
|
|---|
| 64 | /* XXX should union some of these! */
|
|---|
| 65 | /* header at beginning of each mbuf: */
|
|---|
| 66 | struct m_hdr
|
|---|
| 67 | {
|
|---|
| 68 | struct mbuf *mh_next; /* Linked list of mbufs */
|
|---|
| 69 | struct mbuf *mh_prev;
|
|---|
| 70 | struct mbuf *mh_nextpkt; /* Next packet in queue/record */
|
|---|
| 71 | struct mbuf *mh_prevpkt; /* Flags aren't used in the output queue */
|
|---|
| 72 | int mh_flags; /* Misc flags */
|
|---|
| 73 |
|
|---|
| 74 | int mh_size; /* Size of data */
|
|---|
| 75 | struct socket *mh_so;
|
|---|
| 76 |
|
|---|
| 77 | caddr_t mh_data; /* Location of data */
|
|---|
| 78 | int mh_len; /* Amount of data in this mbuf */
|
|---|
| 79 | struct libalias *mh_la; /*Real freebsd store hocksin similar way*/
|
|---|
| 80 | #ifdef M_BUF_DEBUG
|
|---|
| 81 | int mh_id;
|
|---|
| 82 | char *mh_allocation_at_file;
|
|---|
| 83 | int mh_allocation_at_line;
|
|---|
| 84 | #endif
|
|---|
| 85 | };
|
|---|
| 86 |
|
|---|
| 87 | /*
|
|---|
| 88 | * How much room is in the mbuf, from m_data to the end of the mbuf
|
|---|
| 89 | */
|
|---|
| 90 | #define M_ROOM(m) ((m->m_flags & M_EXT)? \
|
|---|
| 91 | (((m)->m_ext + (m)->m_size) - (m)->m_data) \
|
|---|
| 92 | : \
|
|---|
| 93 | (((m)->m_dat + (m)->m_size) - (m)->m_data))
|
|---|
| 94 |
|
|---|
| 95 | /*
|
|---|
| 96 | * How much free room there is
|
|---|
| 97 | */
|
|---|
| 98 | #define M_FREEROOM(m) (M_ROOM(m) - (m)->m_len)
|
|---|
| 99 | #define M_TRAILINGSPACE M_FREEROOM
|
|---|
| 100 |
|
|---|
| 101 | struct mbuf
|
|---|
| 102 | {
|
|---|
| 103 | struct m_hdr m_hdr;
|
|---|
| 104 | union M_dat
|
|---|
| 105 | {
|
|---|
| 106 | char m_dat_[1]; /* ANSI don't like 0 sized arrays */
|
|---|
| 107 | char *m_ext_;
|
|---|
| 108 | } M_dat;
|
|---|
| 109 | };
|
|---|
| 110 |
|
|---|
| 111 | #define m_next m_hdr.mh_next
|
|---|
| 112 | #define m_prev m_hdr.mh_prev
|
|---|
| 113 | #define m_nextpkt m_hdr.mh_nextpkt
|
|---|
| 114 | #define m_prevpkt m_hdr.mh_prevpkt
|
|---|
| 115 | #define m_flags m_hdr.mh_flags
|
|---|
| 116 | #define m_len m_hdr.mh_len
|
|---|
| 117 | #define m_data m_hdr.mh_data
|
|---|
| 118 | #define m_size m_hdr.mh_size
|
|---|
| 119 | #define m_dat M_dat.m_dat_
|
|---|
| 120 | #define m_ext M_dat.m_ext_
|
|---|
| 121 | #define m_so m_hdr.mh_so
|
|---|
| 122 | #define m_la m_hdr.mh_la
|
|---|
| 123 |
|
|---|
| 124 | #define ifq_prev m_prev
|
|---|
| 125 | #define ifq_next m_next
|
|---|
| 126 | #define ifs_prev m_prevpkt
|
|---|
| 127 | #define ifs_next m_nextpkt
|
|---|
| 128 | #define ifq_so m_so
|
|---|
| 129 |
|
|---|
| 130 | #define M_EXT 0x01 /* m_ext points to more (malloced) data */
|
|---|
| 131 | #define M_FREELIST 0x02 /* mbuf is on free list */
|
|---|
| 132 | #define M_USEDLIST 0x04 /* XXX mbuf is on used list (for dtom()) */
|
|---|
| 133 | #define M_DOFREE 0x08 /* when m_free is called on the mbuf, free()
|
|---|
| 134 | * it rather than putting it on the free list */
|
|---|
| 135 | #define M_FRAG 0x0800 /* packet is a fragment of a larger packet */
|
|---|
| 136 | #define M_FIRSTFRAG 0x1000 /* paket is first fragment */
|
|---|
| 137 | #define M_LASTFRAG 0x2000 /* paket is last fragment */
|
|---|
| 138 |
|
|---|
| 139 | extern int mbuf_alloced;
|
|---|
| 140 | extern struct mbuf m_freelist, m_usedlist;
|
|---|
| 141 | extern int mbuf_max;
|
|---|
| 142 |
|
|---|
| 143 | void m_init (PNATState);
|
|---|
| 144 | void m_fini(PNATState pData);
|
|---|
| 145 | void msize_init (PNATState);
|
|---|
| 146 | struct mbuf * m_get (PNATState);
|
|---|
| 147 | void m_free (PNATState, struct mbuf *);
|
|---|
| 148 | void m_cat (PNATState, register struct mbuf *, register struct mbuf *);
|
|---|
| 149 | void m_inc (struct mbuf *, int);
|
|---|
| 150 | void m_adj (struct mbuf *, int);
|
|---|
| 151 | int m_copy (struct mbuf *, struct mbuf *, int, int);
|
|---|
| 152 | struct mbuf * dtom (PNATState, void *);
|
|---|
| 153 |
|
|---|
| 154 | /*
|
|---|
| 155 | * this macro should be used for validation and copying of Ethernet header where it really requred
|
|---|
| 156 | */
|
|---|
| 157 | #define MBUF_HEAD(m) ((caddr_t)(((m)->m_flags & M_EXT) ? (m)->m_ext : (m)->m_dat))
|
|---|
| 158 |
|
|---|
| 159 | #define MBUF_IP_HEADER(m) (caddr_t)(MBUF_HEAD(m) + if_maxlinkhdr)
|
|---|
| 160 |
|
|---|
| 161 | #else /* VBOX_WITH_SLIRP_BSD_MBUF */
|
|---|
| 162 | # include "bsd/sys/mbuf.h"
|
|---|
| 163 | #endif /* VBOX_WITH_SLIRP_BSD_MBUF */
|
|---|
| 164 |
|
|---|
| 165 | #endif /* _MBUF_H_ */
|
|---|
| 166 |
|
|---|
| 167 | #if defined(M_BUF_DEBUG) && !defined(RT_OS_WINDOWS)
|
|---|
| 168 | # define m_get(x) \
|
|---|
| 169 | ({ \
|
|---|
| 170 | struct mbuf *mdb = m_get((x)); \
|
|---|
| 171 | if(mdb) \
|
|---|
| 172 | { \
|
|---|
| 173 | mdb->m_hdr.mh_allocation_at_file = __FILE__; \
|
|---|
| 174 | mdb->m_hdr.mh_allocation_at_line = __LINE__; \
|
|---|
| 175 | } \
|
|---|
| 176 | LogRel(("NAT:m(id:%d, ptr: %p) allocated at: %s:%d\n", (mdb?mdb->m_hdr.mh_id:-1), mdb, __FILE__, __LINE__));\
|
|---|
| 177 | mdb; \
|
|---|
| 178 | })
|
|---|
| 179 |
|
|---|
| 180 | # define m_free(x, m) \
|
|---|
| 181 | ({ \
|
|---|
| 182 | (m)->m_hdr.mh_allocation_at_file = NULL; \
|
|---|
| 183 | (m)->m_hdr.mh_allocation_at_line = 0; \
|
|---|
| 184 | LogRel(("NAT:m(id:%d, ptr: %p) freed at: %s:%d\n", (m)->m_hdr.mh_id, (m), __FILE__, __LINE__)); \
|
|---|
| 185 | m_free((x),(m)); \
|
|---|
| 186 | })
|
|---|
| 187 | #endif
|
|---|
