| 1 | /*- |
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| 2 | * Copyright (c) 1992, 1993 |
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| 3 | * The Regents of the University of California. All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * 1. Redistributions of source code must retain the above copyright |
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| 9 | * notice, this list of conditions and the following disclaimer. |
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer in the |
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| 12 | * documentation and/or other materials provided with the distribution. |
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| 13 | * 3. All advertising materials mentioning features or use of this software |
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| 14 | * must display the following acknowledgement: |
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| 15 | * This product includes software developed by the University of |
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| 16 | * California, Berkeley and its contributors. |
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| 17 | * 4. Neither the name of the University nor the names of its contributors |
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| 18 | * may be used to endorse or promote products derived from this software |
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| 19 | * without specific prior written permission. |
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| 20 | * |
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 31 | * SUCH DAMAGE. |
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| 32 | * |
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| 33 | * @(#)bpf_compat.h 8.1 (Berkeley) 6/10/93 |
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| 34 | * $FreeBSD: src/sys/net/bpf_compat.h,v 1.8 2000/12/27 22:20:13 bmilekic Exp $ |
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| 35 | */ |
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| 36 | |
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| 37 | #ifndef _NET_BPF_COMPAT_H_ |
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| 38 | #define _NET_BPF_COMPAT_H_ |
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| 39 | |
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| 40 | /* |
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| 41 | * Some hacks for compatibility across SunOS and 4.4BSD. We emulate malloc |
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| 42 | * and free with mbuf clusters. We store a pointer to the mbuf in the first |
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| 43 | * word of the mbuf and return 8 bytes passed the start of data (for double |
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| 44 | * word alignment). We cannot just use offsets because clusters are not at |
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| 45 | * a fixed offset from the associated mbuf. Sorry for this kludge. |
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| 46 | */ |
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| 47 | #define malloc(size, type, canwait) bpf_alloc(size, canwait) |
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| 48 | #define free(cp, type) m_free(*(struct mbuf **)(cp - 8)) |
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| 49 | #define M_WAITOK M_TRYWAIT |
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| 50 | #define M_NOWAIT M_DONTWAIT |
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| 51 | |
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| 52 | /* This mapping works for our purposes. */ |
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| 53 | #define ERESTART EINTR |
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| 54 | |
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| 55 | #endif |
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