1 /* $OpenBSD: pcap-int.h,v 1.12 2012/05/25 01:58:08 lteo 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 1.12 2012/05/25 01:58:08 lteo Exp $ (LBL) 36 */ 37 38 #ifndef pcap_int_h 39 #define pcap_int_h 40 41 #include <pcap.h> 42 43 /* 44 * Stuff to do when we close. 45 */ 46 #define MUST_CLEAR_RFMON 0x00000002 /* clear rfmon (monitor) mode */ 47 48 struct pcap_opt { 49 int buffer_size; 50 char *source; 51 int promisc; 52 int rfmon; 53 }; 54 55 /* 56 * Savefile 57 */ 58 struct pcap_sf { 59 FILE *rfile; 60 int swapped; 61 int version_major; 62 int version_minor; 63 u_char *base; 64 }; 65 66 struct pcap_md { 67 struct pcap_stat stat; 68 /*XXX*/ 69 int use_bpf; 70 u_long TotPkts; /* can't oflow for 79 hrs on ether */ 71 u_long TotAccepted; /* count accepted by filter */ 72 u_long TotDrops; /* count of dropped packets */ 73 long TotMissed; /* missed by i/f during this run */ 74 long OrigMissed; /* missed by i/f before this run */ 75 int timeout; /* timeout for buffering */ 76 int must_do_on_close; /* stuff we must do when we close */ 77 struct pcap *next; /* list of open pcaps that need stuff cleared on close */ 78 }; 79 80 struct pcap { 81 int fd; 82 int snapshot; 83 int linktype; 84 int tzoff; /* timezone offset */ 85 int offset; /* offset for proper alignment */ 86 int activated; /* true if the capture is really started */ 87 int oldstyle; /* if we're opening with pcap_open_live() */ 88 int break_loop; /* force break from packet-reading loop */ 89 90 struct pcap_sf sf; 91 struct pcap_md md; 92 struct pcap_opt opt; 93 94 /* 95 * Read buffer. 96 */ 97 int bufsize; 98 u_char *buffer; 99 u_char *bp; 100 int cc; 101 102 /* 103 * Place holder for pcap_next(). 104 */ 105 u_char *pkt; 106 107 108 /* 109 * Placeholder for filter code if bpf not in kernel. 110 */ 111 struct bpf_program fcode; 112 113 /* 114 * Datalink types supported on underlying fd 115 */ 116 int dlt_count; 117 u_int *dlt_list; 118 119 char errbuf[PCAP_ERRBUF_SIZE]; 120 121 struct pcap_pkthdr pcap_header; /* This is needed for the pcap_next_ex() to work */ 122 }; 123 124 /* 125 * How a `pcap_pkthdr' is actually stored in the dumpfile. 126 */ 127 128 struct pcap_sf_pkthdr { 129 struct bpf_timeval ts; /* time stamp */ 130 bpf_u_int32 caplen; /* length of portion present */ 131 bpf_u_int32 len; /* length this packet (off wire) */ 132 }; 133 134 int yylex(void); 135 136 #ifndef min 137 #define min(a, b) ((a) > (b) ? (b) : (a)) 138 #endif 139 140 /* Not all systems have IFF_LOOPBACK */ 141 #ifdef IFF_LOOPBACK 142 #define ISLOOPBACK(name, flags) ((flags) & IFF_LOOPBACK) 143 #else 144 #define ISLOOPBACK(name, flags) ((name)[0] == 'l' && (name)[1] == 'o' && \ 145 (isdigit((unsigned char)((name)[2])) || (name)[2] == '\0')) 146 #endif 147 148 /* XXX should these be in pcap.h? */ 149 int pcap_offline_read(pcap_t *, int, pcap_handler, u_char *); 150 int pcap_read(pcap_t *, int cnt, pcap_handler, u_char *); 151 152 int pcap_do_addexit(pcap_t *); 153 void pcap_add_to_pcaps_to_close(pcap_t *); 154 void pcap_remove_from_pcaps_to_close(pcap_t *); 155 int pcap_check_activated(pcap_t *); 156 157 /* Ultrix pads to make everything line up on a nice boundary */ 158 #if defined(ultrix) || defined(__alpha) 159 #define PCAP_FDDIPAD 3 160 #endif 161 162 /* XXX */ 163 extern int pcap_fddipad; 164 #endif 165