183 lines
6.7 KiB
C
183 lines
6.7 KiB
C
/* $NetBSD: bpfdesc.h,v 1.45 2018/01/25 02:45:02 ozaki-r 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. 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_BPFDESC_H_
|
|
#define _NET_BPFDESC_H_
|
|
|
|
#include <sys/callout.h>
|
|
#include <sys/selinfo.h> /* for struct selinfo */
|
|
#include <net/if.h> /* for IFNAMSIZ */
|
|
#include <net/bpfjit.h> /* for bpfjit_function_t */
|
|
#ifdef _KERNEL
|
|
#include <sys/pslist.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/condvar.h>
|
|
#include <sys/psref.h>
|
|
#endif
|
|
|
|
struct bpf_filter {
|
|
struct bpf_insn *bf_insn; /* filter code */
|
|
size_t bf_size;
|
|
bpfjit_func_t bf_jitcode; /* compiled filter program */
|
|
};
|
|
|
|
/*
|
|
* Descriptor associated with each open bpf file.
|
|
*/
|
|
struct bpf_d {
|
|
/* DEPRECATED. Keep it to avoid breaking kvm(3) users */
|
|
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.
|
|
*/
|
|
void * bd_sbuf; /* store slot */
|
|
void * bd_hbuf; /* hold slot */
|
|
void * 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' */
|
|
/* DEPRECATED. Keep it to avoid breaking kvm(3) users */
|
|
struct bpf_insn *_bd_filter; /* filter code */
|
|
/*
|
|
* XXX we should make the counters per-CPU once we retire kvm(3) users
|
|
* that directly access them.
|
|
*/
|
|
u_long bd_rcount; /* number of packets received */
|
|
u_long bd_dcount; /* number of packets dropped */
|
|
u_long bd_ccount; /* number of packets captured */
|
|
|
|
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_hdrcmplt; /* false to fill in src lladdr */
|
|
int bd_seesent; /* true if bpf should see sent packets */
|
|
int bd_feedback; /* true to feed back sent packets */
|
|
int bd_async; /* non-zero if packet reception should generate signal */
|
|
pid_t 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
|
|
callout_t bd_callout; /* for BPF timeouts with select */
|
|
pid_t bd_pid; /* corresponding PID */
|
|
/* DEPRECATED. Keep it to avoid breaking kvm(3) users */
|
|
LIST_ENTRY(bpf_d) _bd_list; /* list of all BPF's */
|
|
/* DEPRECATED. Keep it to avoid breaking kvm(3) users */
|
|
void *bd_sih; /* soft interrupt handle */
|
|
struct timespec bd_atime; /* access time */
|
|
struct timespec bd_mtime; /* modification time */
|
|
struct timespec bd_btime; /* birth time */
|
|
#ifdef _LP64
|
|
int bd_compat32; /* 32-bit stream on LP64 system */
|
|
#endif
|
|
/* DEPRECATED. Keep it to avoid breaking kvm(3) users */
|
|
bpfjit_func_t bd_jitcode; /* compiled filter program */
|
|
struct bpf_filter *bd_filter;
|
|
#ifdef _KERNEL
|
|
struct pslist_entry bd_bif_dlist_entry; /* For bpf_if */
|
|
struct pslist_entry bd_bpf_dlist_entry; /* For the global list */
|
|
kmutex_t *bd_mtx;
|
|
kmutex_t *bd_buf_mtx;
|
|
kcondvar_t bd_cv;
|
|
#endif
|
|
};
|
|
|
|
|
|
/* Values for bd_state */
|
|
#define BPF_IDLE 0 /* no select in progress */
|
|
#define BPF_WAITING 1 /* waiting for read timeout in select */
|
|
#define BPF_TIMED_OUT 2 /* read timeout has expired in select */
|
|
|
|
/*
|
|
* Description associated with the external representation of each
|
|
* open bpf file.
|
|
*/
|
|
struct bpf_d_ext {
|
|
int32_t bde_bufsize;
|
|
uint8_t bde_promisc;
|
|
uint8_t bde_state;
|
|
uint8_t bde_immediate;
|
|
int32_t bde_hdrcmplt;
|
|
int32_t bde_seesent;
|
|
pid_t bde_pid;
|
|
uint64_t bde_rcount; /* number of packets received */
|
|
uint64_t bde_dcount; /* number of packets dropped */
|
|
uint64_t bde_ccount; /* number of packets captured */
|
|
char bde_ifname[IFNAMSIZ];
|
|
};
|
|
|
|
|
|
/*
|
|
* Descriptor associated with each attached hardware interface.
|
|
*/
|
|
struct bpf_if {
|
|
/* DEPRECATED. Keep it to avoid breaking kvm(3) users */
|
|
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; /* corresponding interface */
|
|
void *bif_si;
|
|
struct mbuf *bif_mbuf_head;
|
|
struct mbuf *bif_mbuf_tail;
|
|
#ifdef _KERNEL
|
|
struct pslist_entry bif_iflist_entry;
|
|
struct pslist_head bif_dlist_head;
|
|
struct psref_target bif_psref;
|
|
#endif
|
|
};
|
|
|
|
#endif /* !_NET_BPFDESC_H_ */
|