0,0 → 1,107 |
/*!\file net/bpfdesc.h |
* Berkeley Packet Filter definitions. |
*/ |
|
/* $NetBSD: bpfdesc.h,v 1.13 1997/10/09 18:58:12 christos Exp $ */ |
|
/* |
* Copyright (c) 1990, 1991, 1993 |
* The Regents of the University of California. All rights reserved. |
* |
* This code is derived from the Stanford/CMU enet packet filter, |
* (net/enet.c) distributed as part of 4.3BSD, and code contributed |
* to Berkeley by Steven McCanne and Van Jacobson both of Lawrence |
* Berkeley Laboratory. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* 1. Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* 2. Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* 3. All advertising materials mentioning features or use of this software |
* must display the following acknowledgement: |
* This product includes software developed by the University of |
* California, Berkeley and its contributors. |
* 4. Neither the name of the University nor the names of its contributors |
* may be used to endorse or promote products derived from this software |
* without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
* SUCH DAMAGE. |
* |
* @(#)bpfdesc.h 8.1 (Berkeley) 6/10/93 |
* |
* @(#) Header: bpfdesc.h,v 1.14 96/06/16 22:28:07 leres Exp (LBL) |
*/ |
|
#ifndef __NET_BPF_DESC_H |
#define __NET_BPF_DESC_H |
|
/* |
* Descriptor associated with each open bpf file. |
*/ |
struct bpf_d { |
struct bpf_d *bd_next; /* Linked list of descriptors */ |
/* |
* Buffer slots: two mbuf clusters buffer the incoming packets. |
* The model has three slots. Sbuf is always occupied. |
* sbuf (store) - Receive interrupt puts packets here. |
* hbuf (hold) - When sbuf is full, put cluster here and |
* wakeup read (replace sbuf with fbuf). |
* fbuf (free) - When read is done, put cluster here. |
* On receiving, if sbuf is full and fbuf is 0, packet is dropped. |
*/ |
caddr_t bd_sbuf; /* store slot */ |
caddr_t bd_hbuf; /* hold slot */ |
caddr_t bd_fbuf; /* free slot */ |
int bd_slen; /* current length of store buffer */ |
int bd_hlen; /* current length of hold buffer */ |
|
int bd_bufsize; /* absolute length of buffers */ |
|
struct bpf_if * bd_bif; /* interface descriptor */ |
u_long bd_rtout; /* Read timeout in 'ticks' */ |
struct bpf_insn *bd_filter; /* filter code */ |
u_long bd_rcount; /* number of packets received */ |
u_long bd_dcount; /* number of packets dropped */ |
|
u_char bd_promisc; /* true if listening promiscuously */ |
u_char bd_state; /* idle, waiting, or timed out */ |
u_char bd_immediate; /* true to return on packet arrival */ |
int bd_async; /* non-zero if packet reception should generate signal */ |
int bd_pgid; /* process or group id for signal */ |
#if BSD < 199103 |
u_char bd_selcoll; /* true if selects collide */ |
int bd_timedout; |
struct proc * bd_selproc; /* process that last selected us */ |
#else |
u_char bd_pad; /* explicit alignment */ |
struct selinfo bd_sel; /* bsd select info */ |
#endif |
}; |
|
/* |
* Descriptor associated with each attached hardware interface. |
*/ |
struct bpf_if { |
struct bpf_if *bif_next; /* list of all interfaces */ |
struct bpf_d *bif_dlist; /* descriptor list */ |
struct bpf_if **bif_driverp; /* pointer into softc */ |
u_int bif_dlt; /* link layer type */ |
u_int bif_hdrlen; /* length of header (with padding) */ |
struct ifnet *bif_ifp; /* correspoding interface */ |
}; |
|
#endif |