The Tcpdump Group git mirrors - libpcap/blob - pcap-int.h

   1 /*
   2  * Copyright (c) 1994, 1995, 1996
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the Computer Systems
  16  *      Engineering Group at Lawrence Berkeley Laboratory.
  17  * 4. Neither the name of the University nor of the Laboratory may be used
  18  *    to endorse or promote products derived from this software without
  19  *    specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#) $Header: /tcpdump/master/libpcap/pcap-int.h,v 1.21 2000-05-04 13:34:24 itojun Exp $ (LBL)
  34  */
  35
  36 #ifndef pcap_int_h
  37 #define pcap_int_h
  38
  39 #include <pcap.h>
  40
  41 /*
  42  * Savefile
  43  */
  44 struct pcap_sf {
  45         FILE *rfile;
  46         int swapped;
  47         int version_major;
  48         int version_minor;
  49         u_char *base;
  50 };
  51
  52 struct pcap_md {
  53         struct pcap_stat stat;
  54         /*XXX*/
  55         int use_bpf;
  56         u_long  TotPkts;        /* can't oflow for 79 hrs on ether */
  57         u_long  TotAccepted;    /* count accepted by filter */
  58         u_long  TotDrops;       /* count of dropped packets */
  59         long    TotMissed;      /* missed by i/f during this run */
  60         long    OrigMissed;     /* missed by i/f before this run */
  61 #ifdef linux
  62         int pad;
  63         int skip;
  64         char *device;
  65 #endif
  66 };
  67
  68 struct pcap {
  69         int fd;
  70         int snapshot;
  71         int linktype;
  72         int tzoff;              /* timezone offset */
  73         int offset;             /* offset for proper alignment */
  74
  75         struct pcap_sf sf;
  76         struct pcap_md md;
  77
  78         /*
  79          * Read buffer.
  80          */
  81         int bufsize;
  82         u_char *buffer;
  83         u_char *bp;
  84         int cc;
  85
  86         /*
  87          * Place holder for pcap_next().
  88          */
  89         u_char *pkt;
  90
  91
  92         /*
  93          * Placeholder for filter code if bpf not in kernel.
  94          */
  95         struct bpf_program fcode;
  96
  97         char errbuf[PCAP_ERRBUF_SIZE];
  98 };
  99
 100 /*
 101  * This is a timeval as stored in disk in a dumpfile.
 102  * It has to use the same types everywhere, independent of the actual
 103  * `struct timeval'
 104  */
 105
 106 struct pcap_timeval {
 107     bpf_int32 tv_sec;           /* seconds */
 108     bpf_int32 tv_usec;          /* microseconds */
 109 };
 110
 111 /*
 112  * How a `pcap_pkthdr' is actually stored in the dumpfile.
 113  */
 114
 115 struct pcap_sf_pkthdr {
 116     struct pcap_timeval ts;     /* time stamp */
 117     bpf_u_int32 caplen;         /* length of portion present */
 118     bpf_u_int32 len;            /* length this packet (off wire) */
 119 };
 120
 121 int     yylex(void);
 122
 123 #ifndef min
 124 #define min(a, b) ((a) > (b) ? (b) : (a))
 125 #endif
 126
 127 /* XXX should these be in pcap.h? */
 128 int     pcap_offline_read(pcap_t *, int, pcap_handler, u_char *);
 129 int     pcap_read(pcap_t *, int cnt, pcap_handler, u_char *);
 130
 131 /* Ultrix pads to make everything line up on a nice boundary */
 132 #if defined(ultrix) || defined(__alpha) || defined(__NetBSD__)
 133 #define       PCAP_FDDIPAD 3
 134 #endif
 135
 136 #ifndef HAVE_STRLCPY
 137 #define strlcpy(x, y, z) \
 138         (strncpy((x), (y), (z)), (x)[(z) - 1] = '\0', strlen((y)))
 139 #endif
 140
 141 /* XXX */
 142 extern  int pcap_fddipad;
 143 #endif