pcap.h revision 17683
117683Spst/* 217683Spst * Copyright (c) 1993, 1994, 1995, 1996 317683Spst * The Regents of the University of California. All rights reserved. 417683Spst * 517683Spst * Redistribution and use in source and binary forms, with or without 617683Spst * modification, are permitted provided that the following conditions 717683Spst * are met: 817683Spst * 1. Redistributions of source code must retain the above copyright 917683Spst * notice, this list of conditions and the following disclaimer. 1017683Spst * 2. Redistributions in binary form must reproduce the above copyright 1117683Spst * notice, this list of conditions and the following disclaimer in the 1217683Spst * documentation and/or other materials provided with the distribution. 1317683Spst * 3. All advertising materials mentioning features or use of this software 1417683Spst * must display the following acknowledgement: 1517683Spst * This product includes software developed by the Computer Systems 1617683Spst * Engineering Group at Lawrence Berkeley Laboratory. 1717683Spst * 4. Neither the name of the University nor of the Laboratory may be used 1817683Spst * to endorse or promote products derived from this software without 1917683Spst * specific prior written permission. 2017683Spst * 2117683Spst * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2217683Spst * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2317683Spst * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2417683Spst * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2517683Spst * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2617683Spst * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2717683Spst * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2817683Spst * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2917683Spst * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3017683Spst * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3117683Spst * SUCH DAMAGE. 3217683Spst * 3317683Spst * @(#) $Header: pcap.h,v 1.20 96/07/12 19:24:15 leres Exp $ (LBL) 3417683Spst */ 3517683Spst 3617683Spst#ifndef lib_pcap_h 3717683Spst#define lib_pcap_h 3817683Spst 3917683Spst#include <sys/types.h> 4017683Spst#include <sys/time.h> 4117683Spst 4217683Spst#include <net/bpf.h> 4317683Spst 4417683Spst#include <stdio.h> 4517683Spst 4617683Spst#define PCAP_VERSION_MAJOR 2 4717683Spst#define PCAP_VERSION_MINOR 4 4817683Spst 4917683Spst#define PCAP_ERRBUF_SIZE 256 5017683Spst 5117683Spst/* 5217683Spst * Compatibility for systems that have a bpf.h that 5317683Spst * predates the bpf typedefs for 64-bit support. 5417683Spst */ 5517683Spst#if BPF_RELEASE - 0 < 199406 5617683Spsttypedef int bpf_int32; 5717683Spsttypedef u_int bpf_u_int32; 5817683Spst#endif 5917683Spst 6017683Spsttypedef struct pcap pcap_t; 6117683Spsttypedef struct pcap_dumper pcap_dumper_t; 6217683Spst 6317683Spst/* 6417683Spst * The first record in the file contains saved values for some 6517683Spst * of the flags used in the printout phases of tcpdump. 6617683Spst * Many fields here are 32 bit ints so compilers won't insert unwanted 6717683Spst * padding; these files need to be interchangeable across architectures. 6817683Spst */ 6917683Spststruct pcap_file_header { 7017683Spst bpf_u_int32 magic; 7117683Spst u_short version_major; 7217683Spst u_short version_minor; 7317683Spst bpf_int32 thiszone; /* gmt to local correction */ 7417683Spst bpf_u_int32 sigfigs; /* accuracy of timestamps */ 7517683Spst bpf_u_int32 snaplen; /* max length saved portion of each pkt */ 7617683Spst bpf_u_int32 linktype; /* data link type (DLT_*) */ 7717683Spst}; 7817683Spst 7917683Spst/* 8017683Spst * Each packet in the dump file is prepended with this generic header. 8117683Spst * This gets around the problem of different headers for different 8217683Spst * packet interfaces. 8317683Spst */ 8417683Spststruct pcap_pkthdr { 8517683Spst struct timeval ts; /* time stamp */ 8617683Spst bpf_u_int32 caplen; /* length of portion present */ 8717683Spst bpf_u_int32 len; /* length this packet (off wire) */ 8817683Spst}; 8917683Spst 9017683Spst/* 9117683Spst * As returned by the pcap_stats() 9217683Spst */ 9317683Spststruct pcap_stat { 9417683Spst u_int ps_recv; /* number of packets received */ 9517683Spst u_int ps_drop; /* number of packets dropped */ 9617683Spst u_int ps_ifdrop; /* drops by interface XXX not yet supported */ 9717683Spst}; 9817683Spst 9917683Spsttypedef void (*pcap_handler)(u_char *, const struct pcap_pkthdr *, 10017683Spst const u_char *); 10117683Spst 10217683Spstchar *pcap_lookupdev(char *); 10317683Spstint pcap_lookupnet(char *, bpf_u_int32 *, bpf_u_int32 *, char *); 10417683Spstpcap_t *pcap_open_live(char *, int, int, int, char *); 10517683Spstpcap_t *pcap_open_offline(char *, char *); 10617683Spstvoid pcap_close(pcap_t *); 10717683Spstint pcap_loop(pcap_t *, int, pcap_handler, u_char *); 10817683Spstint pcap_dispatch(pcap_t *, int, pcap_handler, u_char *); 10917683Spstconst u_char* 11017683Spst pcap_next(pcap_t *, struct pcap_pkthdr *); 11117683Spstint pcap_stats(pcap_t *, struct pcap_stat *); 11217683Spstint pcap_setfilter(pcap_t *, struct bpf_program *); 11317683Spstvoid pcap_perror(pcap_t *, char *); 11417683Spstchar *pcap_strerror(int); 11517683Spstchar *pcap_geterr(pcap_t *); 11617683Spstint pcap_compile(pcap_t *, struct bpf_program *, char *, int, 11717683Spst bpf_u_int32); 11817683Spst/* XXX */ 11917683Spstint pcap_freecode(pcap_t *, struct bpf_program *); 12017683Spstint pcap_datalink(pcap_t *); 12117683Spstint pcap_snapshot(pcap_t *); 12217683Spstint pcap_is_swapped(pcap_t *); 12317683Spstint pcap_major_version(pcap_t *); 12417683Spstint pcap_minor_version(pcap_t *); 12517683Spst 12617683Spst/* XXX */ 12717683SpstFILE *pcap_file(pcap_t *); 12817683Spstint pcap_fileno(pcap_t *); 12917683Spst 13017683Spstpcap_dumper_t *pcap_dump_open(pcap_t *, char *); 13117683Spstvoid pcap_dump_close(pcap_dumper_t *); 13217683Spstvoid pcap_dump(u_char *, const struct pcap_pkthdr *, const u_char *); 13317683Spst 13417683Spst/* XXX this guy lives in the bpf tree */ 13517683Spstu_int bpf_filter(struct bpf_insn *, u_char *, u_int, u_int); 13617683Spstchar *bpf_image(struct bpf_insn *, int); 13717683Spst#endif 138