/* * Copyright (c) 1994, 1995, 1996 * 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-int.h,v 1.94 2008-09-16 00:20:23 guy Exp $ (LBL) */ #ifndef pcap_int_h #define pcap_int_h #include #ifdef __cplusplus extern "C" { #endif #ifdef HAVE_LIBDLPI #include #endif #ifdef WIN32 #include extern CRITICAL_SECTION g_PcapCompileCriticalSection; #endif /* WIN32 */ #ifdef MSDOS #include #include #endif #ifdef HAVE_SNF_API #include #endif #if (defined(_MSC_VER) && (_MSC_VER <= 1200)) /* we are compiling with Visual Studio 6, that doesn't support the LL suffix*/ /* * Swap byte ordering of unsigned long long timestamp on a big endian * machine. */ #define SWAPLL(ull) ((ull & 0xff00000000000000) >> 56) | \ ((ull & 0x00ff000000000000) >> 40) | \ ((ull & 0x0000ff0000000000) >> 24) | \ ((ull & 0x000000ff00000000) >> 8) | \ ((ull & 0x00000000ff000000) << 8) | \ ((ull & 0x0000000000ff0000) << 24) | \ ((ull & 0x000000000000ff00) << 40) | \ ((ull & 0x00000000000000ff) << 56) #else /* A recent Visual studio compiler or not VC */ /* * Swap byte ordering of unsigned long long timestamp on a big endian * machine. */ #define SWAPLL(ull) ((ull & 0xff00000000000000LL) >> 56) | \ ((ull & 0x00ff000000000000LL) >> 40) | \ ((ull & 0x0000ff0000000000LL) >> 24) | \ ((ull & 0x000000ff00000000LL) >> 8) | \ ((ull & 0x00000000ff000000LL) << 8) | \ ((ull & 0x0000000000ff0000LL) << 24) | \ ((ull & 0x000000000000ff00LL) << 40) | \ ((ull & 0x00000000000000ffLL) << 56) #endif /* _MSC_VER */ /* * Savefile */ typedef enum { NOT_SWAPPED, SWAPPED, MAYBE_SWAPPED } swapped_type_t; /* * Used when reading a savefile. */ struct pcap_sf { FILE *rfile; int (*next_packet_op)(pcap_t *, struct pcap_pkthdr *, u_char **); int swapped; size_t hdrsize; swapped_type_t lengths_swapped; int version_major; int version_minor; bpf_u_int32 ifcount; /* number of interfaces seen in this capture */ u_int tsresol; /* time stamp resolution */ u_int tsscale; /* scaling factor for resolution -> microseconds */ u_int64_t tsoffset; /* time stamp offset */ }; /* * Used when doing a live capture. */ struct pcap_md { struct pcap_stat stat; /*XXX*/ int use_bpf; /* using kernel filter */ u_long TotPkts; /* can't oflow for 79 hrs on ether */ u_long TotAccepted; /* count accepted by filter */ u_long TotDrops; /* count of dropped packets */ long TotMissed; /* missed by i/f during this run */ long OrigMissed; /* missed by i/f before this run */ char *device; /* device name */ int timeout; /* timeout for buffering */ int must_do_on_close; /* stuff we must do when we close */ struct pcap *next; /* list of open pcaps that need stuff cleared on close */ #ifdef linux int sock_packet; /* using Linux 2.0 compatible interface */ int cooked; /* using SOCK_DGRAM rather than SOCK_RAW */ int ifindex; /* interface index of device we're bound to */ int lo_ifindex; /* interface index of the loopback device */ u_int packets_read; /* count of packets read with recvfrom() */ bpf_u_int32 oldmode; /* mode to restore when turning monitor mode off */ char *mondevice; /* mac80211 monitor device we created */ u_char *mmapbuf; /* memory-mapped region pointer */ size_t mmapbuflen; /* size of region */ int vlan_offset; /* offset at which to insert vlan tags; if -1, don't insert */ u_int tp_version; /* version of tpacket_hdr for mmaped ring */ u_int tp_hdrlen; /* hdrlen of tpacket_hdr for mmaped ring */ u_char *oneshot_buffer; /* buffer for copy of packet */ long proc_dropped; /* packets reported dropped by /proc/net/dev */ #endif /* linux */ #ifdef HAVE_DAG_API #ifdef HAVE_DAG_STREAMS_API u_char *dag_mem_bottom; /* DAG card current memory bottom pointer */ u_char *dag_mem_top; /* DAG card current memory top pointer */ #else /* HAVE_DAG_STREAMS_API */ void *dag_mem_base; /* DAG card memory base address */ u_int dag_mem_bottom; /* DAG card current memory bottom offset */ u_int dag_mem_top; /* DAG card current memory top offset */ #endif /* HAVE_DAG_STREAMS_API */ int dag_fcs_bits; /* Number of checksum bits from link layer */ int dag_offset_flags; /* Flags to pass to dag_offset(). */ int dag_stream; /* DAG stream number */ int dag_timeout; /* timeout specified to pcap_open_live. * Same as in linux above, introduce * generally? */ #endif /* HAVE_DAG_API */ #ifdef HAVE_SNF_API snf_handle_t snf_handle; /* opaque device handle */ snf_ring_t snf_ring; /* opaque device ring handle */ int snf_timeout; int snf_boardnum; #endif /*HAVE_SNF_API*/ #ifdef HAVE_ZEROCOPY_BPF /* * Zero-copy read buffer -- for zero-copy BPF. 'buffer' above will * alternative between these two actual mmap'd buffers as required. * As there is a header on the front size of the mmap'd buffer, only * some of the buffer is exposed to libpcap as a whole via bufsize; * zbufsize is the true size. zbuffer tracks the current zbuf * assocated with buffer so that it can be used to decide which the * next buffer to read will be. */ u_char *zbuf1, *zbuf2, *zbuffer; u_int zbufsize; u_int zerocopy; u_int interrupted; struct timespec firstsel; /* * If there's currently a buffer being actively processed, then it is * referenced here; 'buffer' is also pointed at it, but offset by the * size of the header. */ struct bpf_zbuf_header *bzh; #endif /* HAVE_ZEROCOPY_BPF */ }; /* * Stuff to do when we close. */ #define MUST_CLEAR_PROMISC 0x00000001 /* clear promiscuous mode */ #define MUST_CLEAR_RFMON 0x00000002 /* clear rfmon (monitor) mode */ #define MUST_DELETE_MONIF 0x00000004 /* delete monitor-mode interface */ struct pcap_opt { int buffer_size; char *source; int promisc; int rfmon; int tstamp_type; }; /* * Ultrix, DEC OSF/1^H^H^H^H^H^H^H^H^HDigital UNIX^H^H^H^H^H^H^H^H^H^H^H^H * Tru64 UNIX, and some versions of NetBSD pad FDDI packets to make everything * line up on a nice boundary. */ #ifdef __NetBSD__ #include /* needed to declare __NetBSD_Version__ */ #endif #if defined(ultrix) || defined(__osf__) || (defined(__NetBSD__) && __NetBSD_Version__ > 106000000) #define PCAP_FDDIPAD 3 #endif typedef int (*activate_op_t)(pcap_t *); typedef int (*can_set_rfmon_op_t)(pcap_t *); typedef int (*read_op_t)(pcap_t *, int cnt, pcap_handler, u_char *); typedef int (*inject_op_t)(pcap_t *, const void *, size_t); typedef int (*setfilter_op_t)(pcap_t *, struct bpf_program *); typedef int (*setdirection_op_t)(pcap_t *, pcap_direction_t); typedef int (*set_datalink_op_t)(pcap_t *, int); typedef int (*getnonblock_op_t)(pcap_t *, char *); typedef int (*setnonblock_op_t)(pcap_t *, int, char *); typedef int (*stats_op_t)(pcap_t *, struct pcap_stat *); #ifdef WIN32 typedef int (*setbuff_op_t)(pcap_t *, int); typedef int (*setmode_op_t)(pcap_t *, int); typedef int (*setmintocopy_op_t)(pcap_t *, int); #endif typedef void (*cleanup_op_t)(pcap_t *); struct pcap { #ifdef WIN32 ADAPTER *adapter; LPPACKET Packet; int nonblock; #else int fd; int selectable_fd; int send_fd; #endif /* WIN32 */ #ifdef HAVE_LIBDLPI dlpi_handle_t dlpi_hd; #endif int snapshot; int linktype; /* Network linktype */ int linktype_ext; /* Extended information stored in the linktype field of a file */ int tzoff; /* timezone offset */ int offset; /* offset for proper alignment */ int activated; /* true if the capture is really started */ int oldstyle; /* if we're opening with pcap_open_live() */ int break_loop; /* flag set to force break from packet-reading loop */ #ifdef PCAP_FDDIPAD int fddipad; #endif #ifdef MSDOS void (*wait_proc)(void); /* call proc while waiting */ #endif struct pcap_sf sf; struct pcap_md md; struct pcap_opt opt; /* * Read buffer. */ int bufsize; u_char *buffer; u_char *bp; int cc; /* * Place holder for pcap_next(). */ u_char *pkt; /* We're accepting only packets in this direction/these directions. */ pcap_direction_t direction; /* * Methods. */ activate_op_t activate_op; can_set_rfmon_op_t can_set_rfmon_op; read_op_t read_op; inject_op_t inject_op; setfilter_op_t setfilter_op; setdirection_op_t setdirection_op; set_datalink_op_t set_datalink_op; getnonblock_op_t getnonblock_op; setnonblock_op_t setnonblock_op; stats_op_t stats_op; /* * Routine to use as callback for pcap_next()/pcap_next_ex(). */ pcap_handler oneshot_callback; #ifdef WIN32 /* * These are, at least currently, specific to the Win32 NPF * driver. */ setbuff_op_t setbuff_op; setmode_op_t setmode_op; setmintocopy_op_t setmintocopy_op; #endif cleanup_op_t cleanup_op; /* * Placeholder for filter code if bpf not in kernel. */ struct bpf_program fcode; char errbuf[PCAP_ERRBUF_SIZE + 1]; int dlt_count; u_int *dlt_list; int tstamp_type_count; u_int *tstamp_type_list; struct pcap_pkthdr pcap_header; /* This is needed for the pcap_next_ex() to work */ }; /* * This is a timeval as stored in a savefile. * It has to use the same types everywhere, independent of the actual * `struct timeval'; `struct timeval' has 32-bit tv_sec values on some * platforms and 64-bit tv_sec values on other platforms, and writing * out native `struct timeval' values would mean files could only be * read on systems with the same tv_sec size as the system on which * the file was written. */ struct pcap_timeval { bpf_int32 tv_sec; /* seconds */ bpf_int32 tv_usec; /* microseconds */ }; /* * This is a `pcap_pkthdr' as actually stored in a savefile. * * Do not change the format of this structure, in any way (this includes * changes that only affect the length of fields in this structure), * and do not make the time stamp anything other than seconds and * microseconds (e.g., seconds and nanoseconds). Instead: * * introduce a new structure for the new format; * * send mail to "tcpdump-workers@lists.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 record * header; * * make the code in "savefile.c" capable of reading files with * the old record header as well as files with the new record header * (using the magic number to determine the header format). * * Then supply the changes by forking the branch at * * https://github.com/mcr/libpcap/issues * * and issuing a pull request, 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_sf_pkthdr { struct pcap_timeval ts; /* time stamp */ bpf_u_int32 caplen; /* length of portion present */ bpf_u_int32 len; /* length this packet (off wire) */ }; /* * How a `pcap_pkthdr' is actually stored in savefiles written * by some patched versions of libpcap (e.g. the ones in Red * Hat Linux 6.1 and 6.2). * * Do not change the format of this structure, in any way (this includes * changes that only affect the length of fields in this structure). * Instead, introduce a new structure, as per the above. */ struct pcap_sf_patched_pkthdr { struct pcap_timeval ts; /* time stamp */ bpf_u_int32 caplen; /* length of portion present */ bpf_u_int32 len; /* length this packet (off wire) */ int index; unsigned short protocol; unsigned char pkt_type; }; /* * User data structure for the one-shot callback used for pcap_next() * and pcap_next_ex(). */ struct oneshot_userdata { struct pcap_pkthdr *hdr; const u_char **pkt; pcap_t *pd; }; int yylex(void); #ifndef min #define min(a, b) ((a) > (b) ? (b) : (a)) #endif /* XXX should these be in pcap.h? */ int pcap_offline_read(pcap_t *, int, pcap_handler, u_char *); int pcap_read(pcap_t *, int cnt, pcap_handler, u_char *); #ifndef HAVE_STRLCPY #define strlcpy(x, y, z) \ (strncpy((x), (y), (z)), \ ((z) <= 0 ? 0 : ((x)[(z) - 1] = '\0')), \ strlen((y))) #endif #include #if !defined(HAVE_SNPRINTF) #define snprintf pcap_snprintf extern int snprintf (char *, size_t, const char *, ...); #endif #if !defined(HAVE_VSNPRINTF) #define vsnprintf pcap_vsnprintf extern int vsnprintf (char *, size_t, const char *, va_list ap); #endif /* * Routines that most pcap implementations can use for non-blocking mode. */ #if !defined(WIN32) && !defined(MSDOS) int pcap_getnonblock_fd(pcap_t *, char *); int pcap_setnonblock_fd(pcap_t *p, int, char *); #endif /* * Internal interfaces for "pcap_create()". * * "pcap_create_interface()" is the routine to do a pcap_create on * a regular network interface. There are multiple implementations * of this, one for each platform type (Linux, BPF, DLPI, etc.), * with the one used chosen by the configure script. * * "pcap_create_common()" allocates and fills in a pcap_t, for use * by pcap_create routines. */ pcap_t *pcap_create_interface(const char *, char *); pcap_t *pcap_create_common(const char *, char *); int pcap_do_addexit(pcap_t *); void pcap_add_to_pcaps_to_close(pcap_t *); void pcap_remove_from_pcaps_to_close(pcap_t *); void pcap_cleanup_live_common(pcap_t *); int pcap_not_initialized(pcap_t *); int pcap_check_activated(pcap_t *); /* * Internal interfaces for "pcap_findalldevs()". * * "pcap_findalldevs_interfaces()" finds interfaces using the * "standard" mechanisms (SIOCGIFCONF, "getifaddrs()", etc.). * * "pcap_platform_finddevs()" is a platform-dependent routine to * add devices not found by the "standard" mechanisms. * * "pcap_add_if()" adds an interface to the list of interfaces, for * use by various "find interfaces" routines. */ int pcap_findalldevs_interfaces(pcap_if_t **, char *); int pcap_platform_finddevs(pcap_if_t **, char *); int add_addr_to_iflist(pcap_if_t **, const char *, u_int, struct sockaddr *, size_t, struct sockaddr *, size_t, struct sockaddr *, size_t, struct sockaddr *, size_t, char *); int pcap_add_if(pcap_if_t **, const char *, u_int, const char *, char *); struct sockaddr *dup_sockaddr(struct sockaddr *, size_t); int add_or_find_if(pcap_if_t **, pcap_if_t **, const char *, u_int, const char *, char *); #ifdef WIN32 char *pcap_win32strerror(void); #endif int install_bpf_program(pcap_t *, struct bpf_program *); int pcap_strcasecmp(const char *, const char *); #ifdef __cplusplus } #endif #endif