c++ lib-pcap-data 源码以及文档

/* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */ /* * Copyright (c) 1993, 1994, 1995, 1996, 1997 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the Computer Systems * Engineering Group at Lawrence Berkeley Laboratory. * 4. Neither the name of the University nor of the Laboratory may be used * to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#) $Header: /tcpdump/master/libpcap/pcap.h,v 1.52.2.6 2006/02/09 22:26:49 guy Exp $ (LBL) */ #ifndef lib_pcap_h #define lib_pcap_h #if defined(WIN32) #include "pcap-stdinc.h" #elif defined(MSDOS) #include <sys/types.h> #include <sys/socket.h> /* u_int, u_char etc. */ #else /* UN*X */ #include <sys/types.h> #include <sys/time.h> #endif /* WIN32/MSDOS/UN*X */ #ifndef PCAP_DONT_INCLUDE_PCAP_BPF_H #include "pcap-bpf.h" #endif //#include <stdio.h> #ifdef HAVE_REMOTE // We have to define the SOCKET here, although it has been defined in sockutils.h // This is to avoid the distribution of the 'sockutils.h' file around // (for example in the WinPcap developer's pack) #ifndef SOCKET #ifdef WIN32 #define SOCKET unsigned int #else #define SOCKET int #endif #endif #endif #ifdef __cplusplus extern "C" { #endif #define PCAP_VERSION_MAJOR 2 #define PCAP_VERSION_MINOR 4 #define PCAP_ERRBUF_SIZE 256 /* * Compatibility for systems that have a bpf.h that * predates the bpf typedefs for 64-bit support. */ #if BPF_RELEASE - 0 < 199406 typedef int bpf_int32; typedef u_int bpf_u_int32; #endif typedef struct pcap pcap_t; typedef struct pcap_dumper pcap_dumper_t; typedef struct pcap_if pcap_if_t; typedef struct pcap_addr pcap_addr_t; /* * The first record in the file contains saved values for some * of the flags used in the printout phases of tcpdump. * Many fields here are 32 bit ints so compilers won't insert unwanted * padding; these files need to be interchangeable across architectures. * * Do not change the layout of this structure, in any way (this includes * changes that only affect the length of fields in this structure). * * Also, do not change the interpretation of any of the members of this * structure, in any way (this includes using values other than * LINKTYPE_ values, as defined in "savefile.c", in the "linktype" * field). * * Instead: * * introduce a new structure for the new format, if the layout * of the structure changed; * * send mail to "tcpdump-workers@tcpdump.org", requesting a new * magic number for your new capture file format, and, when * you get the new magic number, put it in "savefile.c"; * * use that magic number for save files with the changed file * header; * * make the code in "savefile.c" capable of reading files with * the old file header as well as files with the new file header * (using the magic number to determine the header format). * * Then supply the changes to "patches@tcpdump.org", so that future * versions of libpcap and programs that use it (such as tcpdump) will * be able to read your new capture file format. */ struct pcap_file_header { bpf_u_int32 magic; u_short version_major; u_short version_minor; bpf_int32 thiszone; /* gmt to local correction */ bpf_u_int32 sigfigs; /* accuracy of timestamps */ bpf_u_int32 snaplen; /* max length saved portion of each pkt */ bpf_u_int32 linktype; /* data link type (LINKTYPE_*) */ }; typedef enum { PCAP_D_INOUT = 0, PCAP_D_IN, PCAP_D_OUT } pcap_direction_t; /* * Generic per-packet information, as supplied by libpcap. * * The time stamp can and should be a "struct timeval", regardless of * whether your system supports 32-bit tv_sec in "struct timeval", * 64-bit tv_sec in "struct timeval", or both if it supports both 32-bit * and 64-bit applications. The on-disk format of savefiles uses 32-bit * tv_sec (and tv_usec); this structure is irrelevant to that. 32-bit * and 64-bit versions of libpcap, even if they're on the same platform, * should supply the appropriate version of "struct timeval", even if * that's not what the underlying packet capture mechanism supplies. */ struct pcap_pkthdr { struct timeval ts; /* time stamp */ bpf_u_int32 caplen; /* length of portion present */ bpf_u_int32 len; /* length this packet (off wire) */ }; /* * As returned by the pcap_stats() */ struct pcap_stat { u_int ps_recv; /* number of packets received */ u_int ps_drop; /* number of packets dropped */ u_int ps_ifdrop; /* drops by interface XXX not yet supported */ #ifdef HAVE_REMOTE u_int ps_capt; /* number of packets that are received by the application; please get rid off the Win32 ifdef */ u_int ps_sent; /* number of packets sent by the server on the network */ u_int ps_netdrop; /* number of packets lost on the network */ #endif /* HAVE_REMOTE */ }; #ifdef MSDOS /* * As returned by the pcap_stats_ex() */ struct pcap_stat_ex { u_long rx_packets; /* total packets received */ u_long tx_packets; /* total packets transmitted */ u_long rx_bytes; /* total bytes received */ u_long tx_bytes; /* total bytes transmitted */ u_long rx_errors; /* bad packets received */ u_long tx_errors; /* packet transmit problems */ u_long rx_dropped; /* no space in Rx buffers */ u_long tx_dropped; /* no space available for Tx */ u_long multicast; /* multicast packets received */ u_long collisions; /* detailed rx_errors: */ u_long rx_length_errors; u_long rx_over_errors; /* receiver ring buff overflow */ u_long rx_crc_errors; /* recv'd pkt with crc error */ u_long rx_frame_errors; /* recv'd frame alignment error */ u_long rx_fifo_errors; /* recv'r fifo overrun */ u_long rx_missed_errors; /* recv'r missed packet */ /* detailed tx_errors */ u_long tx_aborted_errors; u_long tx_carrier_errors; u_long tx_fifo_errors; u_long tx_heartbeat_errors; u_long tx_window_errors; }; #endif /* * Item in a list of interfaces. */ struct pcap_if { struct pcap_if *next; char *name; /* name to hand to "pcap_open_live()" */ char *description; /* textual description of interface, or NULL */ struct pcap_addr *addresses; bpf_u_int32 flags; /* PCAP_IF_ interface flags */ }; #define PCAP_IF_LOOPBACK