Watt-32 tcp/ip  2.2 dev-rel.10
bpfdesc.h
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1 
5 /* $NetBSD: bpfdesc.h,v 1.13 1997/10/09 18:58:12 christos Exp $ */
6 
7 /*
8  * Copyright (c) 1990, 1991, 1993
9  * The Regents of the University of California. All rights reserved.
10  *
11  * This code is derived from the Stanford/CMU enet packet filter,
12  * (net/enet.c) distributed as part of 4.3BSD, and code contributed
13  * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
14  * Berkeley Laboratory.
15  *
16  * Redistribution and use in source and binary forms, with or without
17  * modification, are permitted provided that the following conditions
18  * are met:
19  * 1. Redistributions of source code must retain the above copyright
20  * notice, this list of conditions and the following disclaimer.
21  * 2. Redistributions in binary form must reproduce the above copyright
22  * notice, this list of conditions and the following disclaimer in the
23  * documentation and/or other materials provided with the distribution.
24  * 3. All advertising materials mentioning features or use of this software
25  * must display the following acknowledgement:
26  * This product includes software developed by the University of
27  * California, Berkeley and its contributors.
28  * 4. Neither the name of the University nor the names of its contributors
29  * may be used to endorse or promote products derived from this software
30  * without specific prior written permission.
31  *
32  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
33  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35  * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
36  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
40  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
41  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42  * SUCH DAMAGE.
43  *
44  * @(#)bpfdesc.h 8.1 (Berkeley) 6/10/93
45  *
46  * @(#) Header: bpfdesc.h,v 1.14 96/06/16 22:28:07 leres Exp (LBL)
47  */
48 
49 #ifndef __NET_BPF_DESC_H
50 #define __NET_BPF_DESC_H
51 
52 /*
53  * Descriptor associated with each open bpf file.
54  */
55 struct bpf_d {
56  struct bpf_d *bd_next; /* Linked list of descriptors */
57  /*
58  * Buffer slots: two mbuf clusters buffer the incoming packets.
59  * The model has three slots. Sbuf is always occupied.
60  * sbuf (store) - Receive interrupt puts packets here.
61  * hbuf (hold) - When sbuf is full, put cluster here and
62  * wakeup read (replace sbuf with fbuf).
63  * fbuf (free) - When read is done, put cluster here.
64  * On receiving, if sbuf is full and fbuf is 0, packet is dropped.
65  */
66  caddr_t bd_sbuf; /* store slot */
67  caddr_t bd_hbuf; /* hold slot */
68  caddr_t bd_fbuf; /* free slot */
69  int bd_slen; /* current length of store buffer */
70  int bd_hlen; /* current length of hold buffer */
71 
72  int bd_bufsize; /* absolute length of buffers */
73 
74  struct bpf_if * bd_bif; /* interface descriptor */
75  u_long bd_rtout; /* Read timeout in 'ticks' */
76  struct bpf_insn *bd_filter; /* filter code */
77  u_long bd_rcount; /* number of packets received */
78  u_long bd_dcount; /* number of packets dropped */
79 
80  u_char bd_promisc; /* true if listening promiscuously */
81  u_char bd_state; /* idle, waiting, or timed out */
82  u_char bd_immediate; /* true to return on packet arrival */
83  int bd_async; /* non-zero if packet reception should generate signal */
84  int bd_pgid; /* process or group id for signal */
85 #if BSD < 199103
86  u_char bd_selcoll; /* true if selects collide */
87  int bd_timedout;
88  struct proc * bd_selproc; /* process that last selected us */
89 #else
90  u_char bd_pad; /* explicit alignment */
91  struct selinfo bd_sel; /* bsd select info */
92 #endif
93 };
94 
95 /*
96  * Descriptor associated with each attached hardware interface.
97  */
98 struct bpf_if {
99  struct bpf_if *bif_next; /* list of all interfaces */
100  struct bpf_d *bif_dlist; /* descriptor list */
101  struct bpf_if **bif_driverp; /* pointer into softc */
102  u_int bif_dlt; /* link layer type */
103  u_int bif_hdrlen; /* length of header (with padding) */
104  struct ifnet *bif_ifp; /* correspoding interface */
105 };
106 
107 #endif
Definition: bpf.h:251
Definition: bpfdesc.h:98
Definition: if.h:83
Definition: if.h:130
Definition: bpfdesc.h:55