1 /* $OpenBSD: pcap-int.h,v 1.11 2006/03/26 20:58:51 djm Exp $ */ 2 3 /* 4 * Copyright (c) 1994, 1995, 1996 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the Computer Systems 18 * Engineering Group at Lawrence Berkeley Laboratory. 19 * 4. Neither the name of the University nor of the Laboratory may be used 20 * to endorse or promote products derived from this software without 21 * specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#) $Header: /home/cvs/src/lib/libpcap/pcap-int.h,v 1.11 2006/03/26 20:58:51 djm Exp $ (LBL) 36 */ 37 38 #ifndef pcap_int_h 39 #define pcap_int_h 40 41 #include <pcap.h> 42 43 /* 44 * Savefile 45 */ 46 struct pcap_sf { 47 FILE *rfile; 48 int swapped; 49 int version_major; 50 int version_minor; 51 u_char *base; 52 }; 53 54 struct pcap_md { 55 struct pcap_stat stat; 56 /*XXX*/ 57 int use_bpf; 58 u_long TotPkts; /* can't oflow for 79 hrs on ether */ 59 u_long TotAccepted; /* count accepted by filter */ 60 u_long TotDrops; /* count of dropped packets */ 61 long TotMissed; /* missed by i/f during this run */ 62 long OrigMissed; /* missed by i/f before this run */ 63 #ifdef linux 64 int pad; 65 int skip; 66 char *device; 67 #endif 68 }; 69 70 struct pcap { 71 int fd; 72 int snapshot; 73 int linktype; 74 int tzoff; /* timezone offset */ 75 int offset; /* offset for proper alignment */ 76 int break_loop; /* force break from packet-reading loop */ 77 78 struct pcap_sf sf; 79 struct pcap_md md; 80 81 /* 82 * Read buffer. 83 */ 84 int bufsize; 85 u_char *buffer; 86 u_char *bp; 87 int cc; 88 89 /* 90 * Place holder for pcap_next(). 91 */ 92 u_char *pkt; 93 94 95 /* 96 * Placeholder for filter code if bpf not in kernel. 97 */ 98 struct bpf_program fcode; 99 100 /* 101 * Datalink types supported on underlying fd 102 */ 103 int dlt_count; 104 u_int *dlt_list; 105 106 char errbuf[PCAP_ERRBUF_SIZE]; 107 108 struct pcap_pkthdr pcap_header; /* This is needed for the pcap_next_ex() to work */ 109 }; 110 111 /* 112 * How a `pcap_pkthdr' is actually stored in the dumpfile. 113 */ 114 115 struct pcap_sf_pkthdr { 116 struct bpf_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 /* Not all systems have IFF_LOOPBACK */ 128 #ifdef IFF_LOOPBACK 129 #define ISLOOPBACK(name, flags) ((flags) & IFF_LOOPBACK) 130 #else 131 #define ISLOOPBACK(name, flags) ((name)[0] == 'l' && (name)[1] == 'o' && \ 132 (isdigit((unsigned char)((name)[2])) || (name)[2] == '\0')) 133 #endif 134 135 /* XXX should these be in pcap.h? */ 136 int pcap_offline_read(pcap_t *, int, pcap_handler, u_char *); 137 int pcap_read(pcap_t *, int cnt, pcap_handler, u_char *); 138 139 /* Ultrix pads to make everything line up on a nice boundary */ 140 #if defined(ultrix) || defined(__alpha) 141 #define PCAP_FDDIPAD 3 142 #endif 143 144 /* XXX */ 145 extern int pcap_fddipad; 146 #endif 147