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 * $FreeBSD$ 34 * @(#) $Header: /tcpdump/master/libpcap/pcap-int.h,v 1.20 1999/11/21 01:10:20 assar Exp $ (LBL) 35 */ 36 37 #ifndef pcap_int_h 38 #define pcap_int_h 39 40 #ifdef __cplusplus 41 extern "C" { 42 #endif 43 44 #include <pcap.h> 45 46 /* 47 * Savefile 48 */ 49 struct pcap_sf { 50 FILE *rfile; 51 int swapped; 52 int version_major; 53 int version_minor; 54 u_char *base; 55 }; 56 57 struct pcap_md { 58 struct pcap_stat stat; 59 /*XXX*/ 60 int use_bpf; 61 u_long TotPkts; /* can't oflow for 79 hrs on ether */ 62 u_long TotAccepted; /* count accepted by filter */ 63 u_long TotDrops; /* count of dropped packets */ 64 long TotMissed; /* missed by i/f during this run */ 65 long OrigMissed; /* missed by i/f before this run */ 66 #ifdef linux 67 int pad; 68 int skip; 69 char *device; 70 #endif 71 }; 72 73 struct pcap { 74 int fd; 75 int snapshot; 76 int linktype; 77 int tzoff; /* timezone offset */ 78 int offset; /* offset for proper alignment */ 79 80 struct pcap_sf sf; 81 struct pcap_md md; 82 83 /* 84 * Read buffer. 85 */ 86 int bufsize; 87 u_char *buffer; 88 u_char *bp; 89 int cc; 90 91 /* 92 * Place holder for pcap_next(). 93 */ 94 u_char *pkt; 95 96 97 /* 98 * Placeholder for filter code if bpf not in kernel. 99 */ 100 struct bpf_program fcode; 101 102 char errbuf[PCAP_ERRBUF_SIZE]; 103 }; 104 105 /* 106 * This is a timeval as stored in disk in a dumpfile. 107 * It has to use the same types everywhere, independent of the actual 108 * `struct timeval' 109 */ 110 111 struct pcap_timeval { 112 bpf_int32 tv_sec; /* seconds */ 113 bpf_int32 tv_usec; /* microseconds */ 114 }; 115 116 /* 117 * How a `pcap_pkthdr' is actually stored in the dumpfile. 118 */ 119 120 struct pcap_sf_pkthdr { 121 struct pcap_timeval ts; /* time stamp */ 122 bpf_u_int32 caplen; /* length of portion present */ 123 bpf_u_int32 len; /* length this packet (off wire) */ 124 }; 125 126 int yylex(void); 127 128 #ifndef min 129 #define min(a, b) ((a) > (b) ? (b) : (a)) 130 #endif 131 132 /* XXX should these be in pcap.h? */ 133 int pcap_offline_read(pcap_t *, int, pcap_handler, u_char *); 134 int pcap_read(pcap_t *, int cnt, pcap_handler, u_char *); 135 136 /* Ultrix pads to make everything line up on a nice boundary */ 137 #if defined(ultrix) || defined(__alpha) || defined(__NetBSD__) 138 #define PCAP_FDDIPAD 3 139 #endif 140 141 /* XXX */ 142 extern int pcap_fddipad; 143 144 #ifdef __cplusplus 145 } 146 #endif 147 148 #endif 149