1 /* $OpenBSD: pcap-int.h,v 1.13 2014/04/11 04:08:58 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 36 #ifndef pcap_int_h 37 #define pcap_int_h 38 39 #include <pcap.h> 40 41 /* 42 * Stuff to do when we close. 43 */ 44 #define MUST_CLEAR_RFMON 0x00000002 /* clear rfmon (monitor) mode */ 45 46 struct pcap_opt { 47 int buffer_size; 48 char *source; 49 int promisc; 50 int rfmon; 51 }; 52 53 /* 54 * Savefile 55 */ 56 struct pcap_sf { 57 FILE *rfile; 58 int swapped; 59 int version_major; 60 int version_minor; 61 u_char *base; 62 }; 63 64 struct pcap_md { 65 struct pcap_stat stat; 66 /*XXX*/ 67 int use_bpf; 68 u_long TotPkts; /* can't oflow for 79 hrs on ether */ 69 u_long TotAccepted; /* count accepted by filter */ 70 u_long TotDrops; /* count of dropped packets */ 71 long TotMissed; /* missed by i/f during this run */ 72 long OrigMissed; /* missed by i/f before this run */ 73 int timeout; /* timeout for buffering */ 74 int must_do_on_close; /* stuff we must do when we close */ 75 struct pcap *next; /* list of open pcaps that need stuff cleared on close */ 76 }; 77 78 struct pcap { 79 int fd; 80 int snapshot; 81 int linktype; 82 int tzoff; /* timezone offset */ 83 int offset; /* offset for proper alignment */ 84 int activated; /* true if the capture is really started */ 85 int oldstyle; /* if we're opening with pcap_open_live() */ 86 int break_loop; /* force break from packet-reading loop */ 87 88 struct pcap_sf sf; 89 struct pcap_md md; 90 struct pcap_opt opt; 91 92 /* 93 * Read buffer. 94 */ 95 int bufsize; 96 u_char *buffer; 97 u_char *bp; 98 int cc; 99 100 /* 101 * Place holder for pcap_next(). 102 */ 103 u_char *pkt; 104 105 106 /* 107 * Placeholder for filter code if bpf not in kernel. 108 */ 109 struct bpf_program fcode; 110 111 /* 112 * Datalink types supported on underlying fd 113 */ 114 int dlt_count; 115 u_int *dlt_list; 116 117 char errbuf[PCAP_ERRBUF_SIZE]; 118 119 struct pcap_pkthdr pcap_header; /* This is needed for the pcap_next_ex() to work */ 120 }; 121 122 /* 123 * How a `pcap_pkthdr' is actually stored in the dumpfile. 124 */ 125 126 struct pcap_sf_pkthdr { 127 struct bpf_timeval ts; /* time stamp */ 128 bpf_u_int32 caplen; /* length of portion present */ 129 bpf_u_int32 len; /* length this packet (off wire) */ 130 }; 131 132 int yylex(void); 133 134 #ifndef min 135 #define min(a, b) ((a) > (b) ? (b) : (a)) 136 #endif 137 138 /* Not all systems have IFF_LOOPBACK */ 139 #ifdef IFF_LOOPBACK 140 #define ISLOOPBACK(name, flags) ((flags) & IFF_LOOPBACK) 141 #else 142 #define ISLOOPBACK(name, flags) ((name)[0] == 'l' && (name)[1] == 'o' && \ 143 (isdigit((unsigned char)((name)[2])) || (name)[2] == '\0')) 144 #endif 145 146 /* XXX should these be in pcap.h? */ 147 int pcap_offline_read(pcap_t *, int, pcap_handler, u_char *); 148 int pcap_read(pcap_t *, int cnt, pcap_handler, u_char *); 149 150 int pcap_do_addexit(pcap_t *); 151 void pcap_add_to_pcaps_to_close(pcap_t *); 152 void pcap_remove_from_pcaps_to_close(pcap_t *); 153 int pcap_check_activated(pcap_t *); 154 155 /* Ultrix pads to make everything line up on a nice boundary */ 156 #if defined(ultrix) || defined(__alpha) 157 #define PCAP_FDDIPAD 3 158 #endif 159 160 /* XXX */ 161 extern int pcap_fddipad; 162 #endif 163