149 lines
5.6 KiB
C
149 lines
5.6 KiB
C
/* $NetBSD: bpfdesc.h,v 1.37 2012/10/28 21:12:44 alnsn Exp $ */
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/*
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* Copyright (c) 1990, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from the Stanford/CMU enet packet filter,
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* (net/enet.c) distributed as part of 4.3BSD, and code contributed
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* to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
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* Berkeley Laboratory.
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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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* @(#)bpfdesc.h 8.1 (Berkeley) 6/10/93
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*
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* @(#) Header: bpfdesc.h,v 1.14 96/06/16 22:28:07 leres Exp (LBL)
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*/
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#ifndef _NET_BPFDESC_H_
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#define _NET_BPFDESC_H_
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#include <sys/callout.h>
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#include <sys/selinfo.h> /* for struct selinfo */
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#include <net/if.h> /* for IFNAMSIZ */
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#include <net/bpfjit.h> /* for bpfjit_function_t */
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/*
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* Descriptor associated with each open bpf file.
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*/
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struct bpf_d {
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struct bpf_d *bd_next; /* Linked list of descriptors */
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/*
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* Buffer slots: two mbuf clusters buffer the incoming packets.
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* The model has three slots. Sbuf is always occupied.
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* sbuf (store) - Receive interrupt puts packets here.
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* hbuf (hold) - When sbuf is full, put cluster here and
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* wakeup read (replace sbuf with fbuf).
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* fbuf (free) - When read is done, put cluster here.
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* On receiving, if sbuf is full and fbuf is 0, packet is dropped.
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*/
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void * bd_sbuf; /* store slot */
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void * bd_hbuf; /* hold slot */
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void * bd_fbuf; /* free slot */
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int bd_slen; /* current length of store buffer */
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int bd_hlen; /* current length of hold buffer */
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int bd_bufsize; /* absolute length of buffers */
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struct bpf_if * bd_bif; /* interface descriptor */
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u_long bd_rtout; /* Read timeout in 'ticks' */
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struct bpf_insn *bd_filter; /* filter code */
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u_long bd_rcount; /* number of packets received */
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u_long bd_dcount; /* number of packets dropped */
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u_long bd_ccount; /* number of packets captured */
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u_char bd_promisc; /* true if listening promiscuously */
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u_char bd_state; /* idle, waiting, or timed out */
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u_char bd_immediate; /* true to return on packet arrival */
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int bd_hdrcmplt; /* false to fill in src lladdr */
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int bd_seesent; /* true if bpf should see sent packets */
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int bd_feedback; /* true to feed back sent packets */
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int bd_async; /* non-zero if packet reception should generate signal */
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pid_t bd_pgid; /* process or group id for signal */
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#if BSD < 199103
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u_char bd_selcoll; /* true if selects collide */
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int bd_timedout;
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struct proc * bd_selproc; /* process that last selected us */
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#else
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u_char bd_pad; /* explicit alignment */
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struct selinfo bd_sel; /* bsd select info */
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#endif
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callout_t bd_callout; /* for BPF timeouts with select */
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pid_t bd_pid; /* corresponding PID */
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LIST_ENTRY(bpf_d) bd_list; /* list of all BPF's */
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void *bd_sih; /* soft interrupt handle */
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struct timespec bd_atime; /* access time */
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struct timespec bd_mtime; /* modification time */
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struct timespec bd_btime; /* birth time */
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#ifdef _LP64
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int bd_compat32; /* 32-bit stream on LP64 system */
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#endif
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bpfjit_function_t bd_jitcode; /* compiled filter program */
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};
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/* Values for bd_state */
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#define BPF_IDLE 0 /* no select in progress */
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#define BPF_WAITING 1 /* waiting for read timeout in select */
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#define BPF_TIMED_OUT 2 /* read timeout has expired in select */
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/*
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* Description associated with the external representation of each
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* open bpf file.
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*/
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struct bpf_d_ext {
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int32_t bde_bufsize;
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uint8_t bde_promisc;
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uint8_t bde_state;
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uint8_t bde_immediate;
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int32_t bde_hdrcmplt;
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int32_t bde_seesent;
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pid_t bde_pid;
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uint64_t bde_rcount; /* number of packets received */
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uint64_t bde_dcount; /* number of packets dropped */
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uint64_t bde_ccount; /* number of packets captured */
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char bde_ifname[IFNAMSIZ];
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};
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/*
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* Descriptor associated with each attached hardware interface.
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*/
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struct bpf_if {
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struct bpf_if *bif_next; /* list of all interfaces */
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struct bpf_d *bif_dlist; /* descriptor list */
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struct bpf_if **bif_driverp; /* pointer into softc */
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u_int bif_dlt; /* link layer type */
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u_int bif_hdrlen; /* length of header (with padding) */
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struct ifnet *bif_ifp; /* corresponding interface */
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};
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#ifdef _KERNEL
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int bpf_setf(struct bpf_d *, struct bpf_program *);
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#endif
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#endif /* !_NET_BPFDESC_H_ */
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