ccc8030189
returned to userland by read(2) also needs to be converted. For this, the bpf descriptor is flagged as compat32 (or not) in the open and ioctl functions (where the user process's pid is also updated in the descriptor). When the bpf buffer is filled in, the 32bits or native header is used depending on the information stored in the descriptor. This won't work if a 64bit binary does the open and ioctls, and then exec a 32bit program which will do the read. But this is very unlikely to happen in real life ... Tested on i386 and loongson; with these changes my loongson can run dhclient and tcpdump with a n32 userland.
147 lines
5.5 KiB
C
147 lines
5.5 KiB
C
/* $NetBSD: bpfdesc.h,v 1.33 2011/08/30 14:22:22 bouyer 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 */
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
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' */
|
|
struct bpf_insn *bd_filter; /* filter code */
|
|
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 */
|
|
LIST_ENTRY(bpf_d) bd_list; /* list of all BPF's */
|
|
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
|
|
};
|
|
|
|
|
|
/* 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 {
|
|
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 */
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
int bpf_setf(struct bpf_d *, struct bpf_program *);
|
|
#endif
|
|
|
|
#endif /* !_NET_BPFDESC_H_ */
|