1*d56f51eaSDavid van Moolenbroek /* $NetBSD: pcap-int.h,v 1.3 2015/03/31 21:39:42 christos Exp $ */ 2*d56f51eaSDavid van Moolenbroek 3*d56f51eaSDavid van Moolenbroek /* 4*d56f51eaSDavid van Moolenbroek * Copyright (c) 1994, 1995, 1996 5*d56f51eaSDavid van Moolenbroek * The Regents of the University of California. All rights reserved. 6*d56f51eaSDavid van Moolenbroek * 7*d56f51eaSDavid van Moolenbroek * Redistribution and use in source and binary forms, with or without 8*d56f51eaSDavid van Moolenbroek * modification, are permitted provided that the following conditions 9*d56f51eaSDavid van Moolenbroek * are met: 10*d56f51eaSDavid van Moolenbroek * 1. Redistributions of source code must retain the above copyright 11*d56f51eaSDavid van Moolenbroek * notice, this list of conditions and the following disclaimer. 12*d56f51eaSDavid van Moolenbroek * 2. Redistributions in binary form must reproduce the above copyright 13*d56f51eaSDavid van Moolenbroek * notice, this list of conditions and the following disclaimer in the 14*d56f51eaSDavid van Moolenbroek * documentation and/or other materials provided with the distribution. 15*d56f51eaSDavid van Moolenbroek * 3. All advertising materials mentioning features or use of this software 16*d56f51eaSDavid van Moolenbroek * must display the following acknowledgement: 17*d56f51eaSDavid van Moolenbroek * This product includes software developed by the Computer Systems 18*d56f51eaSDavid van Moolenbroek * Engineering Group at Lawrence Berkeley Laboratory. 19*d56f51eaSDavid van Moolenbroek * 4. Neither the name of the University nor of the Laboratory may be used 20*d56f51eaSDavid van Moolenbroek * to endorse or promote products derived from this software without 21*d56f51eaSDavid van Moolenbroek * specific prior written permission. 22*d56f51eaSDavid van Moolenbroek * 23*d56f51eaSDavid van Moolenbroek * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24*d56f51eaSDavid van Moolenbroek * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25*d56f51eaSDavid van Moolenbroek * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26*d56f51eaSDavid van Moolenbroek * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27*d56f51eaSDavid van Moolenbroek * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28*d56f51eaSDavid van Moolenbroek * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29*d56f51eaSDavid van Moolenbroek * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30*d56f51eaSDavid van Moolenbroek * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31*d56f51eaSDavid van Moolenbroek * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32*d56f51eaSDavid van Moolenbroek * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33*d56f51eaSDavid van Moolenbroek * SUCH DAMAGE. 34*d56f51eaSDavid van Moolenbroek */ 35*d56f51eaSDavid van Moolenbroek 36*d56f51eaSDavid van Moolenbroek #ifndef pcap_int_h 37*d56f51eaSDavid van Moolenbroek #define pcap_int_h 38*d56f51eaSDavid van Moolenbroek 39*d56f51eaSDavid van Moolenbroek #include <pcap/pcap.h> 40*d56f51eaSDavid van Moolenbroek 41*d56f51eaSDavid van Moolenbroek #ifdef __cplusplus 42*d56f51eaSDavid van Moolenbroek extern "C" { 43*d56f51eaSDavid van Moolenbroek #endif 44*d56f51eaSDavid van Moolenbroek 45*d56f51eaSDavid van Moolenbroek #ifdef WIN32 46*d56f51eaSDavid van Moolenbroek #include <Packet32.h> 47*d56f51eaSDavid van Moolenbroek extern CRITICAL_SECTION g_PcapCompileCriticalSection; 48*d56f51eaSDavid van Moolenbroek #endif /* WIN32 */ 49*d56f51eaSDavid van Moolenbroek 50*d56f51eaSDavid van Moolenbroek #ifdef MSDOS 51*d56f51eaSDavid van Moolenbroek #include <fcntl.h> 52*d56f51eaSDavid van Moolenbroek #include <io.h> 53*d56f51eaSDavid van Moolenbroek #endif 54*d56f51eaSDavid van Moolenbroek 55*d56f51eaSDavid van Moolenbroek #if (defined(_MSC_VER) && (_MSC_VER <= 1200)) /* we are compiling with Visual Studio 6, that doesn't support the LL suffix*/ 56*d56f51eaSDavid van Moolenbroek 57*d56f51eaSDavid van Moolenbroek /* 58*d56f51eaSDavid van Moolenbroek * Swap byte ordering of unsigned long long timestamp on a big endian 59*d56f51eaSDavid van Moolenbroek * machine. 60*d56f51eaSDavid van Moolenbroek */ 61*d56f51eaSDavid van Moolenbroek #define SWAPLL(ull) ((ull & 0xff00000000000000) >> 56) | \ 62*d56f51eaSDavid van Moolenbroek ((ull & 0x00ff000000000000) >> 40) | \ 63*d56f51eaSDavid van Moolenbroek ((ull & 0x0000ff0000000000) >> 24) | \ 64*d56f51eaSDavid van Moolenbroek ((ull & 0x000000ff00000000) >> 8) | \ 65*d56f51eaSDavid van Moolenbroek ((ull & 0x00000000ff000000) << 8) | \ 66*d56f51eaSDavid van Moolenbroek ((ull & 0x0000000000ff0000) << 24) | \ 67*d56f51eaSDavid van Moolenbroek ((ull & 0x000000000000ff00) << 40) | \ 68*d56f51eaSDavid van Moolenbroek ((ull & 0x00000000000000ff) << 56) 69*d56f51eaSDavid van Moolenbroek 70*d56f51eaSDavid van Moolenbroek #else /* A recent Visual studio compiler or not VC */ 71*d56f51eaSDavid van Moolenbroek 72*d56f51eaSDavid van Moolenbroek /* 73*d56f51eaSDavid van Moolenbroek * Swap byte ordering of unsigned long long timestamp on a big endian 74*d56f51eaSDavid van Moolenbroek * machine. 75*d56f51eaSDavid van Moolenbroek */ 76*d56f51eaSDavid van Moolenbroek #define SWAPLL(ull) ((ull & 0xff00000000000000LL) >> 56) | \ 77*d56f51eaSDavid van Moolenbroek ((ull & 0x00ff000000000000LL) >> 40) | \ 78*d56f51eaSDavid van Moolenbroek ((ull & 0x0000ff0000000000LL) >> 24) | \ 79*d56f51eaSDavid van Moolenbroek ((ull & 0x000000ff00000000LL) >> 8) | \ 80*d56f51eaSDavid van Moolenbroek ((ull & 0x00000000ff000000LL) << 8) | \ 81*d56f51eaSDavid van Moolenbroek ((ull & 0x0000000000ff0000LL) << 24) | \ 82*d56f51eaSDavid van Moolenbroek ((ull & 0x000000000000ff00LL) << 40) | \ 83*d56f51eaSDavid van Moolenbroek ((ull & 0x00000000000000ffLL) << 56) 84*d56f51eaSDavid van Moolenbroek 85*d56f51eaSDavid van Moolenbroek #endif /* _MSC_VER */ 86*d56f51eaSDavid van Moolenbroek 87*d56f51eaSDavid van Moolenbroek /* 88*d56f51eaSDavid van Moolenbroek * Maximum snapshot length. 89*d56f51eaSDavid van Moolenbroek * 90*d56f51eaSDavid van Moolenbroek * Somewhat arbitrary, but chosen to be: 91*d56f51eaSDavid van Moolenbroek * 92*d56f51eaSDavid van Moolenbroek * 1) big enough for maximum-size Linux loopback packets (65549) 93*d56f51eaSDavid van Moolenbroek * and some USB packets captured with USBPcap: 94*d56f51eaSDavid van Moolenbroek * 95*d56f51eaSDavid van Moolenbroek * http://desowin.org/usbpcap/ 96*d56f51eaSDavid van Moolenbroek * 97*d56f51eaSDavid van Moolenbroek * (> 131072, < 262144) 98*d56f51eaSDavid van Moolenbroek * 99*d56f51eaSDavid van Moolenbroek * and 100*d56f51eaSDavid van Moolenbroek * 101*d56f51eaSDavid van Moolenbroek * 2) small enough not to cause attempts to allocate huge amounts of 102*d56f51eaSDavid van Moolenbroek * memory; some applications might use the snapshot length in a 103*d56f51eaSDavid van Moolenbroek * savefile header to control the size of the buffer they allocate, 104*d56f51eaSDavid van Moolenbroek * so a size of, say, 2^31-1 might not work well. 105*d56f51eaSDavid van Moolenbroek * 106*d56f51eaSDavid van Moolenbroek * We don't enforce this in pcap_set_snaplen(), but we use it internally. 107*d56f51eaSDavid van Moolenbroek */ 108*d56f51eaSDavid van Moolenbroek #define MAXIMUM_SNAPLEN 262144 109*d56f51eaSDavid van Moolenbroek 110*d56f51eaSDavid van Moolenbroek struct pcap_opt { 111*d56f51eaSDavid van Moolenbroek char *source; 112*d56f51eaSDavid van Moolenbroek int timeout; /* timeout for buffering */ 113*d56f51eaSDavid van Moolenbroek int buffer_size; 114*d56f51eaSDavid van Moolenbroek int promisc; 115*d56f51eaSDavid van Moolenbroek int rfmon; /* monitor mode */ 116*d56f51eaSDavid van Moolenbroek int immediate; /* immediate mode - deliver packets as soon as they arrive */ 117*d56f51eaSDavid van Moolenbroek int tstamp_type; 118*d56f51eaSDavid van Moolenbroek int tstamp_precision; 119*d56f51eaSDavid van Moolenbroek }; 120*d56f51eaSDavid van Moolenbroek 121*d56f51eaSDavid van Moolenbroek typedef int (*activate_op_t)(pcap_t *); 122*d56f51eaSDavid van Moolenbroek typedef int (*can_set_rfmon_op_t)(pcap_t *); 123*d56f51eaSDavid van Moolenbroek typedef int (*read_op_t)(pcap_t *, int cnt, pcap_handler, u_char *); 124*d56f51eaSDavid van Moolenbroek typedef int (*inject_op_t)(pcap_t *, const void *, size_t); 125*d56f51eaSDavid van Moolenbroek typedef int (*setfilter_op_t)(pcap_t *, struct bpf_program *); 126*d56f51eaSDavid van Moolenbroek typedef int (*setdirection_op_t)(pcap_t *, pcap_direction_t); 127*d56f51eaSDavid van Moolenbroek typedef int (*set_datalink_op_t)(pcap_t *, int); 128*d56f51eaSDavid van Moolenbroek typedef int (*getnonblock_op_t)(pcap_t *, char *); 129*d56f51eaSDavid van Moolenbroek typedef int (*setnonblock_op_t)(pcap_t *, int, char *); 130*d56f51eaSDavid van Moolenbroek typedef int (*stats_op_t)(pcap_t *, struct pcap_stat *); 131*d56f51eaSDavid van Moolenbroek #ifdef WIN32 132*d56f51eaSDavid van Moolenbroek typedef int (*setbuff_op_t)(pcap_t *, int); 133*d56f51eaSDavid van Moolenbroek typedef int (*setmode_op_t)(pcap_t *, int); 134*d56f51eaSDavid van Moolenbroek typedef int (*setmintocopy_op_t)(pcap_t *, int); 135*d56f51eaSDavid van Moolenbroek typedef Adapter *(*getadapter_op_t)(pcap_t *); 136*d56f51eaSDavid van Moolenbroek #endif 137*d56f51eaSDavid van Moolenbroek typedef void (*cleanup_op_t)(pcap_t *); 138*d56f51eaSDavid van Moolenbroek 139*d56f51eaSDavid van Moolenbroek /* 140*d56f51eaSDavid van Moolenbroek * We put all the stuff used in the read code path at the beginning, 141*d56f51eaSDavid van Moolenbroek * to try to keep it together in the same cache line or lines. 142*d56f51eaSDavid van Moolenbroek */ 143*d56f51eaSDavid van Moolenbroek struct pcap { 144*d56f51eaSDavid van Moolenbroek /* 145*d56f51eaSDavid van Moolenbroek * Method to call to read packets on a live capture. 146*d56f51eaSDavid van Moolenbroek */ 147*d56f51eaSDavid van Moolenbroek read_op_t read_op; 148*d56f51eaSDavid van Moolenbroek 149*d56f51eaSDavid van Moolenbroek /* 150*d56f51eaSDavid van Moolenbroek * Method to call to read to read packets from a savefile. 151*d56f51eaSDavid van Moolenbroek */ 152*d56f51eaSDavid van Moolenbroek int (*next_packet_op)(pcap_t *, struct pcap_pkthdr *, u_char **); 153*d56f51eaSDavid van Moolenbroek 154*d56f51eaSDavid van Moolenbroek #ifdef WIN32 155*d56f51eaSDavid van Moolenbroek ADAPTER *adapter; 156*d56f51eaSDavid van Moolenbroek LPPACKET Packet; 157*d56f51eaSDavid van Moolenbroek int nonblock; 158*d56f51eaSDavid van Moolenbroek #else 159*d56f51eaSDavid van Moolenbroek int fd; 160*d56f51eaSDavid van Moolenbroek int selectable_fd; 161*d56f51eaSDavid van Moolenbroek #endif /* WIN32 */ 162*d56f51eaSDavid van Moolenbroek 163*d56f51eaSDavid van Moolenbroek /* 164*d56f51eaSDavid van Moolenbroek * Read buffer. 165*d56f51eaSDavid van Moolenbroek */ 166*d56f51eaSDavid van Moolenbroek int bufsize; 167*d56f51eaSDavid van Moolenbroek u_char *buffer; 168*d56f51eaSDavid van Moolenbroek u_char *bp; 169*d56f51eaSDavid van Moolenbroek int cc; 170*d56f51eaSDavid van Moolenbroek 171*d56f51eaSDavid van Moolenbroek int break_loop; /* flag set to force break from packet-reading loop */ 172*d56f51eaSDavid van Moolenbroek 173*d56f51eaSDavid van Moolenbroek void *priv; /* private data for methods */ 174*d56f51eaSDavid van Moolenbroek 175*d56f51eaSDavid van Moolenbroek int swapped; 176*d56f51eaSDavid van Moolenbroek FILE *rfile; /* null if live capture, non-null if savefile */ 177*d56f51eaSDavid van Moolenbroek int fddipad; 178*d56f51eaSDavid van Moolenbroek struct pcap *next; /* list of open pcaps that need stuff cleared on close */ 179*d56f51eaSDavid van Moolenbroek 180*d56f51eaSDavid van Moolenbroek /* 181*d56f51eaSDavid van Moolenbroek * File version number; meaningful only for a savefile, but we 182*d56f51eaSDavid van Moolenbroek * keep it here so that apps that (mistakenly) ask for the 183*d56f51eaSDavid van Moolenbroek * version numbers will get the same zero values that they 184*d56f51eaSDavid van Moolenbroek * always did. 185*d56f51eaSDavid van Moolenbroek */ 186*d56f51eaSDavid van Moolenbroek int version_major; 187*d56f51eaSDavid van Moolenbroek int version_minor; 188*d56f51eaSDavid van Moolenbroek 189*d56f51eaSDavid van Moolenbroek int snapshot; 190*d56f51eaSDavid van Moolenbroek int linktype; /* Network linktype */ 191*d56f51eaSDavid van Moolenbroek int linktype_ext; /* Extended information stored in the linktype field of a file */ 192*d56f51eaSDavid van Moolenbroek int tzoff; /* timezone offset */ 193*d56f51eaSDavid van Moolenbroek int offset; /* offset for proper alignment */ 194*d56f51eaSDavid van Moolenbroek int activated; /* true if the capture is really started */ 195*d56f51eaSDavid van Moolenbroek int oldstyle; /* if we're opening with pcap_open_live() */ 196*d56f51eaSDavid van Moolenbroek 197*d56f51eaSDavid van Moolenbroek struct pcap_opt opt; 198*d56f51eaSDavid van Moolenbroek 199*d56f51eaSDavid van Moolenbroek /* 200*d56f51eaSDavid van Moolenbroek * Place holder for pcap_next(). 201*d56f51eaSDavid van Moolenbroek */ 202*d56f51eaSDavid van Moolenbroek u_char *pkt; 203*d56f51eaSDavid van Moolenbroek 204*d56f51eaSDavid van Moolenbroek /* We're accepting only packets in this direction/these directions. */ 205*d56f51eaSDavid van Moolenbroek pcap_direction_t direction; 206*d56f51eaSDavid van Moolenbroek 207*d56f51eaSDavid van Moolenbroek /* 208*d56f51eaSDavid van Moolenbroek * Flags to affect BPF code generation. 209*d56f51eaSDavid van Moolenbroek */ 210*d56f51eaSDavid van Moolenbroek int bpf_codegen_flags; 211*d56f51eaSDavid van Moolenbroek 212*d56f51eaSDavid van Moolenbroek /* 213*d56f51eaSDavid van Moolenbroek * Placeholder for filter code if bpf not in kernel. 214*d56f51eaSDavid van Moolenbroek */ 215*d56f51eaSDavid van Moolenbroek struct bpf_program fcode; 216*d56f51eaSDavid van Moolenbroek 217*d56f51eaSDavid van Moolenbroek char errbuf[PCAP_ERRBUF_SIZE + 1]; 218*d56f51eaSDavid van Moolenbroek int dlt_count; 219*d56f51eaSDavid van Moolenbroek u_int *dlt_list; 220*d56f51eaSDavid van Moolenbroek int tstamp_type_count; 221*d56f51eaSDavid van Moolenbroek u_int *tstamp_type_list; 222*d56f51eaSDavid van Moolenbroek int tstamp_precision_count; 223*d56f51eaSDavid van Moolenbroek u_int *tstamp_precision_list; 224*d56f51eaSDavid van Moolenbroek 225*d56f51eaSDavid van Moolenbroek struct pcap_pkthdr pcap_header; /* This is needed for the pcap_next_ex() to work */ 226*d56f51eaSDavid van Moolenbroek 227*d56f51eaSDavid van Moolenbroek /* 228*d56f51eaSDavid van Moolenbroek * More methods. 229*d56f51eaSDavid van Moolenbroek */ 230*d56f51eaSDavid van Moolenbroek activate_op_t activate_op; 231*d56f51eaSDavid van Moolenbroek can_set_rfmon_op_t can_set_rfmon_op; 232*d56f51eaSDavid van Moolenbroek inject_op_t inject_op; 233*d56f51eaSDavid van Moolenbroek setfilter_op_t setfilter_op; 234*d56f51eaSDavid van Moolenbroek setdirection_op_t setdirection_op; 235*d56f51eaSDavid van Moolenbroek set_datalink_op_t set_datalink_op; 236*d56f51eaSDavid van Moolenbroek getnonblock_op_t getnonblock_op; 237*d56f51eaSDavid van Moolenbroek setnonblock_op_t setnonblock_op; 238*d56f51eaSDavid van Moolenbroek stats_op_t stats_op; 239*d56f51eaSDavid van Moolenbroek 240*d56f51eaSDavid van Moolenbroek /* 241*d56f51eaSDavid van Moolenbroek * Routine to use as callback for pcap_next()/pcap_next_ex(). 242*d56f51eaSDavid van Moolenbroek */ 243*d56f51eaSDavid van Moolenbroek pcap_handler oneshot_callback; 244*d56f51eaSDavid van Moolenbroek 245*d56f51eaSDavid van Moolenbroek #ifdef WIN32 246*d56f51eaSDavid van Moolenbroek /* 247*d56f51eaSDavid van Moolenbroek * These are, at least currently, specific to the Win32 NPF 248*d56f51eaSDavid van Moolenbroek * driver. 249*d56f51eaSDavid van Moolenbroek */ 250*d56f51eaSDavid van Moolenbroek setbuff_op_t setbuff_op; 251*d56f51eaSDavid van Moolenbroek setmode_op_t setmode_op; 252*d56f51eaSDavid van Moolenbroek setmintocopy_op_t setmintocopy_op; 253*d56f51eaSDavid van Moolenbroek getadapter_op_t getadapter_op; 254*d56f51eaSDavid van Moolenbroek #endif 255*d56f51eaSDavid van Moolenbroek cleanup_op_t cleanup_op; 256*d56f51eaSDavid van Moolenbroek }; 257*d56f51eaSDavid van Moolenbroek 258*d56f51eaSDavid van Moolenbroek /* 259*d56f51eaSDavid van Moolenbroek * BPF code generation flags. 260*d56f51eaSDavid van Moolenbroek */ 261*d56f51eaSDavid van Moolenbroek #define BPF_SPECIAL_VLAN_HANDLING 0x00000001 /* special VLAN handling for Linux */ 262*d56f51eaSDavid van Moolenbroek 263*d56f51eaSDavid van Moolenbroek /* 264*d56f51eaSDavid van Moolenbroek * This is a timeval as stored in a savefile. 265*d56f51eaSDavid van Moolenbroek * It has to use the same types everywhere, independent of the actual 266*d56f51eaSDavid van Moolenbroek * `struct timeval'; `struct timeval' has 32-bit tv_sec values on some 267*d56f51eaSDavid van Moolenbroek * platforms and 64-bit tv_sec values on other platforms, and writing 268*d56f51eaSDavid van Moolenbroek * out native `struct timeval' values would mean files could only be 269*d56f51eaSDavid van Moolenbroek * read on systems with the same tv_sec size as the system on which 270*d56f51eaSDavid van Moolenbroek * the file was written. 271*d56f51eaSDavid van Moolenbroek */ 272*d56f51eaSDavid van Moolenbroek 273*d56f51eaSDavid van Moolenbroek struct pcap_timeval { 274*d56f51eaSDavid van Moolenbroek bpf_int32 tv_sec; /* seconds */ 275*d56f51eaSDavid van Moolenbroek bpf_int32 tv_usec; /* microseconds */ 276*d56f51eaSDavid van Moolenbroek }; 277*d56f51eaSDavid van Moolenbroek 278*d56f51eaSDavid van Moolenbroek /* 279*d56f51eaSDavid van Moolenbroek * This is a `pcap_pkthdr' as actually stored in a savefile. 280*d56f51eaSDavid van Moolenbroek * 281*d56f51eaSDavid van Moolenbroek * Do not change the format of this structure, in any way (this includes 282*d56f51eaSDavid van Moolenbroek * changes that only affect the length of fields in this structure), 283*d56f51eaSDavid van Moolenbroek * and do not make the time stamp anything other than seconds and 284*d56f51eaSDavid van Moolenbroek * microseconds (e.g., seconds and nanoseconds). Instead: 285*d56f51eaSDavid van Moolenbroek * 286*d56f51eaSDavid van Moolenbroek * introduce a new structure for the new format; 287*d56f51eaSDavid van Moolenbroek * 288*d56f51eaSDavid van Moolenbroek * send mail to "tcpdump-workers@lists.tcpdump.org", requesting 289*d56f51eaSDavid van Moolenbroek * a new magic number for your new capture file format, and, when 290*d56f51eaSDavid van Moolenbroek * you get the new magic number, put it in "savefile.c"; 291*d56f51eaSDavid van Moolenbroek * 292*d56f51eaSDavid van Moolenbroek * use that magic number for save files with the changed record 293*d56f51eaSDavid van Moolenbroek * header; 294*d56f51eaSDavid van Moolenbroek * 295*d56f51eaSDavid van Moolenbroek * make the code in "savefile.c" capable of reading files with 296*d56f51eaSDavid van Moolenbroek * the old record header as well as files with the new record header 297*d56f51eaSDavid van Moolenbroek * (using the magic number to determine the header format). 298*d56f51eaSDavid van Moolenbroek * 299*d56f51eaSDavid van Moolenbroek * Then supply the changes by forking the branch at 300*d56f51eaSDavid van Moolenbroek * 301*d56f51eaSDavid van Moolenbroek * https://github.com/the-tcpdump-group/libpcap/issues 302*d56f51eaSDavid van Moolenbroek * 303*d56f51eaSDavid van Moolenbroek * and issuing a pull request, so that future versions of libpcap and 304*d56f51eaSDavid van Moolenbroek * programs that use it (such as tcpdump) will be able to read your new 305*d56f51eaSDavid van Moolenbroek * capture file format. 306*d56f51eaSDavid van Moolenbroek */ 307*d56f51eaSDavid van Moolenbroek 308*d56f51eaSDavid van Moolenbroek struct pcap_sf_pkthdr { 309*d56f51eaSDavid van Moolenbroek struct pcap_timeval ts; /* time stamp */ 310*d56f51eaSDavid van Moolenbroek bpf_u_int32 caplen; /* length of portion present */ 311*d56f51eaSDavid van Moolenbroek bpf_u_int32 len; /* length this packet (off wire) */ 312*d56f51eaSDavid van Moolenbroek }; 313*d56f51eaSDavid van Moolenbroek 314*d56f51eaSDavid van Moolenbroek /* 315*d56f51eaSDavid van Moolenbroek * How a `pcap_pkthdr' is actually stored in savefiles written 316*d56f51eaSDavid van Moolenbroek * by some patched versions of libpcap (e.g. the ones in Red 317*d56f51eaSDavid van Moolenbroek * Hat Linux 6.1 and 6.2). 318*d56f51eaSDavid van Moolenbroek * 319*d56f51eaSDavid van Moolenbroek * Do not change the format of this structure, in any way (this includes 320*d56f51eaSDavid van Moolenbroek * changes that only affect the length of fields in this structure). 321*d56f51eaSDavid van Moolenbroek * Instead, introduce a new structure, as per the above. 322*d56f51eaSDavid van Moolenbroek */ 323*d56f51eaSDavid van Moolenbroek 324*d56f51eaSDavid van Moolenbroek struct pcap_sf_patched_pkthdr { 325*d56f51eaSDavid van Moolenbroek struct pcap_timeval ts; /* time stamp */ 326*d56f51eaSDavid van Moolenbroek bpf_u_int32 caplen; /* length of portion present */ 327*d56f51eaSDavid van Moolenbroek bpf_u_int32 len; /* length this packet (off wire) */ 328*d56f51eaSDavid van Moolenbroek int index; 329*d56f51eaSDavid van Moolenbroek unsigned short protocol; 330*d56f51eaSDavid van Moolenbroek unsigned char pkt_type; 331*d56f51eaSDavid van Moolenbroek }; 332*d56f51eaSDavid van Moolenbroek 333*d56f51eaSDavid van Moolenbroek /* 334*d56f51eaSDavid van Moolenbroek * User data structure for the one-shot callback used for pcap_next() 335*d56f51eaSDavid van Moolenbroek * and pcap_next_ex(). 336*d56f51eaSDavid van Moolenbroek */ 337*d56f51eaSDavid van Moolenbroek struct oneshot_userdata { 338*d56f51eaSDavid van Moolenbroek struct pcap_pkthdr *hdr; 339*d56f51eaSDavid van Moolenbroek const u_char **pkt; 340*d56f51eaSDavid van Moolenbroek pcap_t *pd; 341*d56f51eaSDavid van Moolenbroek }; 342*d56f51eaSDavid van Moolenbroek 343*d56f51eaSDavid van Moolenbroek int yylex(void); 344*d56f51eaSDavid van Moolenbroek 345*d56f51eaSDavid van Moolenbroek #ifndef min 346*d56f51eaSDavid van Moolenbroek #define min(a, b) ((a) > (b) ? (b) : (a)) 347*d56f51eaSDavid van Moolenbroek #endif 348*d56f51eaSDavid van Moolenbroek 349*d56f51eaSDavid van Moolenbroek /* XXX should these be in pcap.h? */ 350*d56f51eaSDavid van Moolenbroek int pcap_offline_read(pcap_t *, int, pcap_handler, u_char *); 351*d56f51eaSDavid van Moolenbroek int pcap_read(pcap_t *, int cnt, pcap_handler, u_char *); 352*d56f51eaSDavid van Moolenbroek 353*d56f51eaSDavid van Moolenbroek #ifndef HAVE_STRLCPY 354*d56f51eaSDavid van Moolenbroek #define strlcpy(x, y, z) \ 355*d56f51eaSDavid van Moolenbroek (strncpy((x), (y), (z)), \ 356*d56f51eaSDavid van Moolenbroek ((z) <= 0 ? 0 : ((x)[(z) - 1] = '\0')), \ 357*d56f51eaSDavid van Moolenbroek strlen((y))) 358*d56f51eaSDavid van Moolenbroek #endif 359*d56f51eaSDavid van Moolenbroek 360*d56f51eaSDavid van Moolenbroek #include <stdarg.h> 361*d56f51eaSDavid van Moolenbroek 362*d56f51eaSDavid van Moolenbroek #if !defined(HAVE_SNPRINTF) 363*d56f51eaSDavid van Moolenbroek #define snprintf pcap_snprintf 364*d56f51eaSDavid van Moolenbroek extern int snprintf (char *, size_t, const char *, ...); 365*d56f51eaSDavid van Moolenbroek #endif 366*d56f51eaSDavid van Moolenbroek 367*d56f51eaSDavid van Moolenbroek #if !defined(HAVE_VSNPRINTF) 368*d56f51eaSDavid van Moolenbroek #define vsnprintf pcap_vsnprintf 369*d56f51eaSDavid van Moolenbroek extern int vsnprintf (char *, size_t, const char *, va_list ap); 370*d56f51eaSDavid van Moolenbroek #endif 371*d56f51eaSDavid van Moolenbroek 372*d56f51eaSDavid van Moolenbroek /* 373*d56f51eaSDavid van Moolenbroek * Does the packet count argument to a module's read routine say 374*d56f51eaSDavid van Moolenbroek * "supply packets until you run out of packets"? 375*d56f51eaSDavid van Moolenbroek */ 376*d56f51eaSDavid van Moolenbroek #define PACKET_COUNT_IS_UNLIMITED(count) ((count) <= 0) 377*d56f51eaSDavid van Moolenbroek 378*d56f51eaSDavid van Moolenbroek /* 379*d56f51eaSDavid van Moolenbroek * Routines that most pcap implementations can use for non-blocking mode. 380*d56f51eaSDavid van Moolenbroek */ 381*d56f51eaSDavid van Moolenbroek #if !defined(WIN32) && !defined(MSDOS) 382*d56f51eaSDavid van Moolenbroek int pcap_getnonblock_fd(pcap_t *, char *); 383*d56f51eaSDavid van Moolenbroek int pcap_setnonblock_fd(pcap_t *p, int, char *); 384*d56f51eaSDavid van Moolenbroek #endif 385*d56f51eaSDavid van Moolenbroek 386*d56f51eaSDavid van Moolenbroek /* 387*d56f51eaSDavid van Moolenbroek * Internal interfaces for "pcap_create()". 388*d56f51eaSDavid van Moolenbroek * 389*d56f51eaSDavid van Moolenbroek * "pcap_create_interface()" is the routine to do a pcap_create on 390*d56f51eaSDavid van Moolenbroek * a regular network interface. There are multiple implementations 391*d56f51eaSDavid van Moolenbroek * of this, one for each platform type (Linux, BPF, DLPI, etc.), 392*d56f51eaSDavid van Moolenbroek * with the one used chosen by the configure script. 393*d56f51eaSDavid van Moolenbroek * 394*d56f51eaSDavid van Moolenbroek * "pcap_create_common()" allocates and fills in a pcap_t, for use 395*d56f51eaSDavid van Moolenbroek * by pcap_create routines. 396*d56f51eaSDavid van Moolenbroek */ 397*d56f51eaSDavid van Moolenbroek pcap_t *pcap_create_interface(const char *, char *); 398*d56f51eaSDavid van Moolenbroek pcap_t *pcap_create_common(const char *, char *, size_t); 399*d56f51eaSDavid van Moolenbroek int pcap_do_addexit(pcap_t *); 400*d56f51eaSDavid van Moolenbroek void pcap_add_to_pcaps_to_close(pcap_t *); 401*d56f51eaSDavid van Moolenbroek void pcap_remove_from_pcaps_to_close(pcap_t *); 402*d56f51eaSDavid van Moolenbroek void pcap_cleanup_live_common(pcap_t *); 403*d56f51eaSDavid van Moolenbroek int pcap_not_initialized(pcap_t *); 404*d56f51eaSDavid van Moolenbroek int pcap_check_activated(pcap_t *); 405*d56f51eaSDavid van Moolenbroek 406*d56f51eaSDavid van Moolenbroek /* 407*d56f51eaSDavid van Moolenbroek * Internal interfaces for "pcap_findalldevs()". 408*d56f51eaSDavid van Moolenbroek * 409*d56f51eaSDavid van Moolenbroek * "pcap_findalldevs_interfaces()" finds interfaces using the 410*d56f51eaSDavid van Moolenbroek * "standard" mechanisms (SIOCGIFCONF, "getifaddrs()", etc.). 411*d56f51eaSDavid van Moolenbroek * 412*d56f51eaSDavid van Moolenbroek * "pcap_platform_finddevs()" is a platform-dependent routine to 413*d56f51eaSDavid van Moolenbroek * add devices not found by the "standard" mechanisms. 414*d56f51eaSDavid van Moolenbroek * 415*d56f51eaSDavid van Moolenbroek * "pcap_add_if()" adds an interface to the list of interfaces, for 416*d56f51eaSDavid van Moolenbroek * use by various "find interfaces" routines. 417*d56f51eaSDavid van Moolenbroek */ 418*d56f51eaSDavid van Moolenbroek int pcap_findalldevs_interfaces(pcap_if_t **, char *); 419*d56f51eaSDavid van Moolenbroek int pcap_platform_finddevs(pcap_if_t **, char *); 420*d56f51eaSDavid van Moolenbroek int add_addr_to_iflist(pcap_if_t **, const char *, u_int, struct sockaddr *, 421*d56f51eaSDavid van Moolenbroek size_t, struct sockaddr *, size_t, struct sockaddr *, size_t, 422*d56f51eaSDavid van Moolenbroek struct sockaddr *, size_t, char *); 423*d56f51eaSDavid van Moolenbroek int add_addr_to_dev(pcap_if_t *, struct sockaddr *, size_t, 424*d56f51eaSDavid van Moolenbroek struct sockaddr *, size_t, struct sockaddr *, size_t, 425*d56f51eaSDavid van Moolenbroek struct sockaddr *dstaddr, size_t, char *errbuf); 426*d56f51eaSDavid van Moolenbroek int pcap_add_if(pcap_if_t **, const char *, u_int, const char *, char *); 427*d56f51eaSDavid van Moolenbroek struct sockaddr *dup_sockaddr(struct sockaddr *, size_t); 428*d56f51eaSDavid van Moolenbroek int add_or_find_if(pcap_if_t **, pcap_if_t **, const char *, u_int, 429*d56f51eaSDavid van Moolenbroek const char *, char *); 430*d56f51eaSDavid van Moolenbroek 431*d56f51eaSDavid van Moolenbroek /* 432*d56f51eaSDavid van Moolenbroek * Internal interfaces for "pcap_open_offline()". 433*d56f51eaSDavid van Moolenbroek * 434*d56f51eaSDavid van Moolenbroek * "pcap_open_offline_common()" allocates and fills in a pcap_t, for use 435*d56f51eaSDavid van Moolenbroek * by pcap_open_offline routines. 436*d56f51eaSDavid van Moolenbroek * 437*d56f51eaSDavid van Moolenbroek * "sf_cleanup()" closes the file handle associated with a pcap_t, if 438*d56f51eaSDavid van Moolenbroek * appropriate, and frees all data common to all modules for handling 439*d56f51eaSDavid van Moolenbroek * savefile types. 440*d56f51eaSDavid van Moolenbroek */ 441*d56f51eaSDavid van Moolenbroek pcap_t *pcap_open_offline_common(char *ebuf, size_t size); 442*d56f51eaSDavid van Moolenbroek void sf_cleanup(pcap_t *p); 443*d56f51eaSDavid van Moolenbroek 444*d56f51eaSDavid van Moolenbroek /* 445*d56f51eaSDavid van Moolenbroek * Internal interfaces for both "pcap_create()" and routines that 446*d56f51eaSDavid van Moolenbroek * open savefiles. 447*d56f51eaSDavid van Moolenbroek * 448*d56f51eaSDavid van Moolenbroek * "pcap_oneshot()" is the standard one-shot callback for "pcap_next()" 449*d56f51eaSDavid van Moolenbroek * and "pcap_next_ex()". 450*d56f51eaSDavid van Moolenbroek */ 451*d56f51eaSDavid van Moolenbroek void pcap_oneshot(u_char *, const struct pcap_pkthdr *, const u_char *); 452*d56f51eaSDavid van Moolenbroek 453*d56f51eaSDavid van Moolenbroek #ifdef WIN32 454*d56f51eaSDavid van Moolenbroek char *pcap_win32strerror(void); 455*d56f51eaSDavid van Moolenbroek #endif 456*d56f51eaSDavid van Moolenbroek 457*d56f51eaSDavid van Moolenbroek int install_bpf_program(pcap_t *, struct bpf_program *); 458*d56f51eaSDavid van Moolenbroek 459*d56f51eaSDavid van Moolenbroek int pcap_strcasecmp(const char *, const char *); 460*d56f51eaSDavid van Moolenbroek 461*d56f51eaSDavid van Moolenbroek #ifdef __cplusplus 462*d56f51eaSDavid van Moolenbroek } 463*d56f51eaSDavid van Moolenbroek #endif 464*d56f51eaSDavid van Moolenbroek 465*d56f51eaSDavid van Moolenbroek #endif 466