/* -*- 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 1.45.2.4 2004/01/27 22:56:20 guy Exp $ (LBL) */ #ifndef lib_pcap_h #define lib_pcap_h #ifdef WIN32 #include #else /* WIN32 */ #include #include #endif /* WIN32 */ #ifndef PCAP_DONT_INCLUDE_PCAP_BPF_H #include #endif #include #ifdef __cplusplus extern "C" { #endif #ifdef __VMS /* ** Set __nomember_alignment to avoid internal and tail ** padding in structures; __quadword base alignment. ** Required for consistency across programming languages. */ #pragma __member_alignment __save #ifdef __cplusplus # pragma __nomember_alignment __longword /* best we can do with C++ */ #else /* ! __cplusplus */ # pragma __nomember_alignment __quadword #endif /* ! __cplusplus */ #endif /* __VMS */ #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_*) */ }; /* * Each packet in the dump file is prepended with this generic header. * This gets around the problem of different headers for different * packet interfaces. */ 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 WIN32 u_int bs_capt; /* number of packets that reach the application */ #endif /* WIN32 */ }; /* * 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 0x00000001 /* interface is loopback */ /* * Representation of an interface address. */ struct pcap_addr { struct pcap_addr *next; struct sockaddr *addr; /* address */ struct sockaddr *netmask; /* netmask for that address */ struct sockaddr *broadaddr; /* broadcast address for that address */ struct sockaddr *dstaddr; /* P2P destination address for that address */ }; typedef void (*pcap_handler)(u_char *, const struct pcap_pkthdr *, const u_char *); char *pcap_lookupdev(char *); int pcap_lookupnet(const char *, bpf_u_int32 *, bpf_u_int32 *, char *); pcap_t *pcap_open_live(const char *, int, int, int, char *); pcap_t *pcap_open_dead(int, int); pcap_t *pcap_open_offline(const char *, char *); void pcap_close(pcap_t *); int pcap_loop(pcap_t *, int, pcap_handler, u_char *); int pcap_dispatch(pcap_t *, int, pcap_handler, u_char *); const u_char* pcap_next(pcap_t *, struct pcap_pkthdr *); int pcap_next_ex(pcap_t *, struct pcap_pkthdr **, const u_char **); void pcap_breakloop(pcap_t *); int pcap_stats(pcap_t *, struct pcap_stat *); int pcap_setfilter(pcap_t *, struct bpf_program *); int pcap_getnonblock(pcap_t *, char *); int pcap_setnonblock(pcap_t *, int, char *); void pcap_perror(pcap_t *, char *); char *pcap_strerror(int); char *pcap_geterr(pcap_t *); int pcap_compile(pcap_t *, struct bpf_program *, char *, int, bpf_u_int32); int pcap_compile_nopcap(int, int, struct bpf_program *, char *, int, bpf_u_int32); void pcap_freecode(struct bpf_program *); int pcap_datalink(pcap_t *); int pcap_list_datalinks(pcap_t *, int **); int pcap_set_datalink(pcap_t *, int); int pcap_datalink_name_to_val(const char *); const char *pcap_datalink_val_to_name(int); const char *pcap_datalink_val_to_description(int); int pcap_snapshot(pcap_t *); int pcap_is_swapped(pcap_t *); int pcap_major_version(pcap_t *); int pcap_minor_version(pcap_t *); /* XXX */ FILE *pcap_file(pcap_t *); int pcap_fileno(pcap_t *); pcap_dumper_t *pcap_dump_open(pcap_t *, const char *); int pcap_dump_flush(pcap_dumper_t *); void pcap_dump_close(pcap_dumper_t *); void pcap_dump(u_char *, const struct pcap_pkthdr *, const u_char *); FILE *pcap_dump_file(pcap_dumper_t *); int pcap_findalldevs(pcap_if_t **, char *); void pcap_freealldevs(pcap_if_t *); const char *pcap_lib_version(void); /* XXX this guy lives in the bpf tree */ u_int bpf_filter(struct bpf_insn *, u_char *, u_int, u_int); int bpf_validate(struct bpf_insn *f, int len); char *bpf_image(struct bpf_insn *, int); void bpf_dump(struct bpf_program *, int); #ifdef WIN32 /* * Win32 definitions */ int pcap_setbuff(pcap_t *p, int dim); int pcap_setmode(pcap_t *p, int mode); int pcap_sendpacket(pcap_t *p, u_char *buf, int size); int pcap_setmintocopy(pcap_t *p, int size); #ifdef WPCAP /* Include file with the wpcap-specific extensions */ #include #endif #define MODE_CAPT 0 #define MODE_STAT 1 #define MODE_MON 2 #else /* * UN*X definitions */ int pcap_get_selectable_fd(pcap_t *); #endif /* WIN32 */ #ifdef __VMS #pragma __member_alignment __restore #endif /* __VMS */ #ifdef __cplusplus } #endif #endif