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 1.33 2001/08/24 07:46:52 guy Exp $ (LBL) 34 * 35 * $FreeBSD$ 36 */ 37 38 #ifndef pcap_int_h 39 #define pcap_int_h 40 41 #ifdef __cplusplus 42 extern "C" { 43 #endif 44 45 #include <pcap.h> 46 47 /* 48 * Savefile 49 */ 50 struct pcap_sf { 51 FILE *rfile; 52 int swapped; 53 int hdrsize; 54 int version_major; 55 int version_minor; 56 u_char *base; 57 }; 58 59 struct pcap_md { 60 struct pcap_stat stat; 61 /*XXX*/ 62 int use_bpf; /* using kernel filter */ 63 u_long TotPkts; /* can't oflow for 79 hrs on ether */ 64 u_long TotAccepted; /* count accepted by filter */ 65 u_long TotDrops; /* count of dropped packets */ 66 long TotMissed; /* missed by i/f during this run */ 67 long OrigMissed; /* missed by i/f before this run */ 68 #ifdef linux 69 int sock_packet; /* using Linux 2.0 compatible interface */ 70 int timeout; /* timeout specified to pcap_open_live */ 71 int clear_promisc; /* must clear promiscuous mode when we close */ 72 int cooked; /* using SOCK_DGRAM rather than SOCK_RAW */ 73 int lo_ifindex; /* interface index of the loopback device */ 74 char *device; /* device name */ 75 struct pcap *next; /* list of open promiscuous sock_packet pcaps */ 76 #endif 77 }; 78 79 struct pcap { 80 int fd; 81 int snapshot; 82 int linktype; 83 int tzoff; /* timezone offset */ 84 int offset; /* offset for proper alignment */ 85 86 struct pcap_sf sf; 87 struct pcap_md md; 88 89 /* 90 * Read buffer. 91 */ 92 int bufsize; 93 u_char *buffer; 94 u_char *bp; 95 int cc; 96 97 /* 98 * Place holder for pcap_next(). 99 */ 100 u_char *pkt; 101 102 103 /* 104 * Placeholder for filter code if bpf not in kernel. 105 */ 106 struct bpf_program fcode; 107 108 char errbuf[PCAP_ERRBUF_SIZE]; 109 }; 110 111 /* 112 * This is a timeval as stored in disk in a dumpfile. 113 * It has to use the same types everywhere, independent of the actual 114 * `struct timeval' 115 */ 116 117 struct pcap_timeval { 118 bpf_int32 tv_sec; /* seconds */ 119 bpf_int32 tv_usec; /* microseconds */ 120 }; 121 122 /* 123 * How a `pcap_pkthdr' is actually stored in the dumpfile. 124 * 125 * Do not change the format of this structure, in any way (this includes 126 * changes that only affect the length of fields in this structure), 127 * and do not make the time stamp anything other than seconds and 128 * microseconds (e.g., seconds and nanoseconds). Instead: 129 * 130 * introduce a new structure for the new format; 131 * 132 * send mail to "tcpdump-workers@tcpdump.org", requesting a new 133 * magic number for your new capture file format, and, when 134 * you get the new magic number, put it in "savefile.c"; 135 * 136 * use that magic number for save files with the changed record 137 * header; 138 * 139 * make the code in "savefile.c" capable of reading files with 140 * the old record header as well as files with the new record header 141 * (using the magic number to determine the header format). 142 * 143 * Then supply the changes to "patches@tcpdump.org", so that future 144 * versions of libpcap and programs that use it (such as tcpdump) will 145 * be able to read your new capture file format. 146 */ 147 148 struct pcap_sf_pkthdr { 149 struct pcap_timeval ts; /* time stamp */ 150 bpf_u_int32 caplen; /* length of portion present */ 151 bpf_u_int32 len; /* length this packet (off wire) */ 152 }; 153 154 /* 155 * How a `pcap_pkthdr' is actually stored in dumpfiles written 156 * by some patched versions of libpcap (e.g. the ones in Red 157 * Hat Linux 6.1 and 6.2). 158 * 159 * Do not change the format of this structure, in any way (this includes 160 * changes that only affect the length of fields in this structure). 161 * Instead, introduce a new structure, as per the above. 162 */ 163 164 struct pcap_sf_patched_pkthdr { 165 struct pcap_timeval ts; /* time stamp */ 166 bpf_u_int32 caplen; /* length of portion present */ 167 bpf_u_int32 len; /* length this packet (off wire) */ 168 int index; 169 unsigned short protocol; 170 unsigned char pkt_type; 171 }; 172 173 int yylex(void); 174 175 #ifndef min 176 #define min(a, b) ((a) > (b) ? (b) : (a)) 177 #endif 178 179 /* XXX should these be in pcap.h? */ 180 int pcap_offline_read(pcap_t *, int, pcap_handler, u_char *); 181 int pcap_read(pcap_t *, int cnt, pcap_handler, u_char *); 182 183 /* 184 * Ultrix, DEC OSF/1^H^H^H^H^H^H^H^H^HDigital UNIX^H^H^H^H^H^H^H^H^H^H^H^H 185 * Tru64 UNIX, and NetBSD pad to make everything line up on a nice boundary. 186 */ 187 #if defined(ultrix) || defined(__osf__) || defined(__NetBSD__) 188 #define PCAP_FDDIPAD 3 189 #endif 190 191 #ifndef HAVE_STRLCPY 192 #define strlcpy(x, y, z) \ 193 (strncpy((x), (y), (z)), \ 194 ((z) <= 0 ? 0 : ((x)[(z) - 1] = '\0')), \ 195 strlen((y))) 196 #endif 197 198 #ifdef linux 199 void pcap_close_linux(pcap_t *); 200 #endif 201 202 /* XXX */ 203 extern int pcap_fddipad; 204 205 int install_bpf_program(pcap_t *, struct bpf_program *); 206 207 #ifdef __cplusplus 208 } 209 #endif 210 211 #endif 212