1 /* $OpenBSD: pcap-int.h,v 1.14 2018/04/05 03:47:27 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 int immediate; /* immediate mode - deliver packets as soon as they arrive */ 52 }; 53 54 /* 55 * Savefile 56 */ 57 struct pcap_sf { 58 FILE *rfile; 59 int swapped; 60 int version_major; 61 int version_minor; 62 u_char *base; 63 }; 64 65 struct pcap_md { 66 struct pcap_stat stat; 67 /*XXX*/ 68 int use_bpf; 69 u_long TotPkts; /* can't oflow for 79 hrs on ether */ 70 u_long TotAccepted; /* count accepted by filter */ 71 u_long TotDrops; /* count of dropped packets */ 72 long TotMissed; /* missed by i/f during this run */ 73 long OrigMissed; /* missed by i/f before this run */ 74 int timeout; /* timeout for buffering */ 75 int must_do_on_close; /* stuff we must do when we close */ 76 struct pcap *next; /* list of open pcaps that need stuff cleared on close */ 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 int activated; /* true if the capture is really started */ 86 int oldstyle; /* if we're opening with pcap_open_live() */ 87 int break_loop; /* force break from packet-reading loop */ 88 89 struct pcap_sf sf; 90 struct pcap_md md; 91 struct pcap_opt opt; 92 93 /* 94 * Read buffer. 95 */ 96 int bufsize; 97 u_char *buffer; 98 u_char *bp; 99 int cc; 100 101 /* 102 * Place holder for pcap_next(). 103 */ 104 u_char *pkt; 105 106 107 /* 108 * Placeholder for filter code if bpf not in kernel. 109 */ 110 struct bpf_program fcode; 111 112 /* 113 * Datalink types supported on underlying fd 114 */ 115 int dlt_count; 116 u_int *dlt_list; 117 118 char errbuf[PCAP_ERRBUF_SIZE]; 119 120 struct pcap_pkthdr pcap_header; /* This is needed for the pcap_next_ex() to work */ 121 }; 122 123 /* 124 * How a `pcap_pkthdr' is actually stored in the dumpfile. 125 */ 126 127 struct pcap_sf_pkthdr { 128 struct bpf_timeval ts; /* time stamp */ 129 bpf_u_int32 caplen; /* length of portion present */ 130 bpf_u_int32 len; /* length this packet (off wire) */ 131 }; 132 133 int yylex(void); 134 135 #ifndef min 136 #define min(a, b) ((a) > (b) ? (b) : (a)) 137 #endif 138 139 /* Not all systems have IFF_LOOPBACK */ 140 #ifdef IFF_LOOPBACK 141 #define ISLOOPBACK(name, flags) ((flags) & IFF_LOOPBACK) 142 #else 143 #define ISLOOPBACK(name, flags) ((name)[0] == 'l' && (name)[1] == 'o' && \ 144 (isdigit((unsigned char)((name)[2])) || (name)[2] == '\0')) 145 #endif 146 147 /* XXX should these be in pcap.h? */ 148 int pcap_offline_read(pcap_t *, int, pcap_handler, u_char *); 149 int pcap_read(pcap_t *, int cnt, pcap_handler, u_char *); 150 151 int pcap_do_addexit(pcap_t *); 152 void pcap_add_to_pcaps_to_close(pcap_t *); 153 void pcap_remove_from_pcaps_to_close(pcap_t *); 154 int pcap_check_activated(pcap_t *); 155 156 /* Ultrix pads to make everything line up on a nice boundary */ 157 #if defined(ultrix) || defined(__alpha) 158 #define PCAP_FDDIPAD 3 159 #endif 160 161 /* XXX */ 162 extern int pcap_fddipad; 163 #endif 164