NetBSD/lib/libpcap/pcap-int.h

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/* $NetBSD: pcap-int.h,v 1.8 2001/02/07 17:35:56 itojun Exp $ */
/*
* Copyright (c) 1994, 1995, 1996
* The Regents of the University of California. All rights reserved.
*
* 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 Computer Systems
* Engineering Group at Lawrence Berkeley Laboratory.
* 4. Neither the name of the University nor of the Laboratory 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.
*
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* @(#) Header: pcap-int.h,v 1.18 96/11/27 18:43:09 leres Exp (LBL)
*/
#ifndef pcap_int_h
#define pcap_int_h
#include <pcap.h>
/*
* Savefile
*/
struct pcap_sf {
FILE *rfile;
int swapped;
int hdrsize;
int version_major;
int version_minor;
u_char *base;
};
struct pcap_md {
struct pcap_stat stat;
/*XXX*/
int use_bpf;
u_long TotPkts; /* can't oflow for 79 hrs on ether */
u_long TotAccepted; /* count accepted by filter */
u_long TotDrops; /* count of dropped packets */
long TotMissed; /* missed by i/f during this run */
long OrigMissed; /* missed by i/f before this run */
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#ifdef linux
int pad;
int skip;
char *device;
#endif
};
struct pcap {
int fd;
int snapshot;
int linktype;
int tzoff; /* timezone offset */
int offset; /* offset for proper alignment */
struct pcap_sf sf;
struct pcap_md md;
/*
* Read buffer.
*/
int bufsize;
u_char *buffer;
u_char *bp;
int cc;
/*
* Place holder for pcap_next().
*/
u_char *pkt;
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/*
* Placeholder for filter code if bpf not in kernel.
*/
struct bpf_program fcode;
char errbuf[PCAP_ERRBUF_SIZE];
};
/*
* This is a timeval as stored in disk in a dumpfile.
* It has to use the same types everywhere, independent of the actual
* `struct timeval'
*/
struct pcap_timeval {
bpf_int32 tv_sec; /* seconds */
bpf_int32 tv_usec; /* microseconds */
};
/*
* How a `pcap_pkthdr' is actually stored in the dumpfile.
*
* Do not change the format of this structure, in any way (this includes
* changes that only affect the length of fields in this structure),
* and do not make the time stamp anything other than seconds and
* microseconds (e.g., seconds and nanoseconds). Instead:
*
* introduce a new structure for the new format;
*
* send mail to "tcpdump-workers@tcpdump.org", requesting a new
* magic number for your new capture file format, and, when
* you get the new magic number, put it in "savefile.c";
*
* use that magic number for save files with the changed record
* header;
*
* make the code in "savefile.c" capable of reading files with
* the old record header as well as files with the new record header
* (using the magic number to determine the header format).
*
* Then supply the changes to "patches@tcpdump.org", so that future
* versions of libpcap and programs that use it (such as tcpdump) will
* be able to read your new capture file format.
*/
struct pcap_sf_pkthdr {
struct pcap_timeval ts; /* time stamp */
bpf_u_int32 caplen; /* length of portion present */
bpf_u_int32 len; /* length this packet (off wire) */
};
int yylex(void);
#ifndef min
#define min(a, b) ((a) > (b) ? (b) : (a))
#endif
/* XXX should these be in pcap.h? */
int pcap_offline_read(pcap_t *, int, pcap_handler, u_char *);
int pcap_read(pcap_t *, int cnt, pcap_handler, u_char *);
/* ULTRIX, Digital UNIX & NetBSD pad to make everything line
up on a nice boundary */
#if defined(ultrix) || defined(__alpha) || defined(__NetBSD__)
#define PCAP_FDDIPAD 3
#endif
/* XXX */
extern int pcap_fddipad;
#endif