493 lines
15 KiB
C
493 lines
15 KiB
C
/*
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* Copyright (c) 1994, 1995, 1996
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the Computer Systems
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* Engineering Group at Lawrence Berkeley Laboratory.
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* 4. Neither the name of the University nor of the Laboratory may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#) $Header: /tcpdump/master/libpcap/pcap-int.h,v 1.94 2008-09-16 00:20:23 guy Exp $ (LBL)
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*/
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#ifndef pcap_int_h
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#define pcap_int_h
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#include <pcap/pcap.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef HAVE_LIBDLPI
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#include <libdlpi.h>
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#endif
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#ifdef WIN32
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#include <Packet32.h>
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extern CRITICAL_SECTION g_PcapCompileCriticalSection;
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#endif /* WIN32 */
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#ifdef MSDOS
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#include <fcntl.h>
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#include <io.h>
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#endif
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#ifdef HAVE_SNF_API
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#include <snf.h>
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#endif
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#if (defined(_MSC_VER) && (_MSC_VER <= 1200)) /* we are compiling with Visual Studio 6, that doesn't support the LL suffix*/
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/*
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* Swap byte ordering of unsigned long long timestamp on a big endian
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* machine.
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*/
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#define SWAPLL(ull) ((ull & 0xff00000000000000) >> 56) | \
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((ull & 0x00ff000000000000) >> 40) | \
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((ull & 0x0000ff0000000000) >> 24) | \
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((ull & 0x000000ff00000000) >> 8) | \
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((ull & 0x00000000ff000000) << 8) | \
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((ull & 0x0000000000ff0000) << 24) | \
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((ull & 0x000000000000ff00) << 40) | \
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((ull & 0x00000000000000ff) << 56)
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#else /* A recent Visual studio compiler or not VC */
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/*
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* Swap byte ordering of unsigned long long timestamp on a big endian
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* machine.
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*/
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#define SWAPLL(ull) ((ull & 0xff00000000000000LL) >> 56) | \
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((ull & 0x00ff000000000000LL) >> 40) | \
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((ull & 0x0000ff0000000000LL) >> 24) | \
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((ull & 0x000000ff00000000LL) >> 8) | \
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((ull & 0x00000000ff000000LL) << 8) | \
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((ull & 0x0000000000ff0000LL) << 24) | \
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((ull & 0x000000000000ff00LL) << 40) | \
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((ull & 0x00000000000000ffLL) << 56)
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#endif /* _MSC_VER */
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/*
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* Savefile
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*/
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typedef enum {
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NOT_SWAPPED,
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SWAPPED,
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MAYBE_SWAPPED
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} swapped_type_t;
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/*
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* Used when reading a savefile.
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*/
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struct pcap_sf {
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FILE *rfile;
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int (*next_packet_op)(pcap_t *, struct pcap_pkthdr *, u_char **);
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int swapped;
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size_t hdrsize;
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swapped_type_t lengths_swapped;
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int version_major;
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int version_minor;
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bpf_u_int32 ifcount; /* number of interfaces seen in this capture */
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u_int tsresol; /* time stamp resolution */
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u_int tsscale; /* scaling factor for resolution -> microseconds */
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u_int64_t tsoffset; /* time stamp offset */
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};
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/*
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* Used when doing a live capture.
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*/
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struct pcap_md {
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struct pcap_stat stat;
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/*XXX*/
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int use_bpf; /* using kernel filter */
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u_long TotPkts; /* can't oflow for 79 hrs on ether */
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u_long TotAccepted; /* count accepted by filter */
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u_long TotDrops; /* count of dropped packets */
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long TotMissed; /* missed by i/f during this run */
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long OrigMissed; /* missed by i/f before this run */
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char *device; /* device name */
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int timeout; /* timeout for buffering */
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int must_do_on_close; /* stuff we must do when we close */
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struct pcap *next; /* list of open pcaps that need stuff cleared on close */
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#ifdef linux
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int sock_packet; /* using Linux 2.0 compatible interface */
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int cooked; /* using SOCK_DGRAM rather than SOCK_RAW */
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int ifindex; /* interface index of device we're bound to */
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int lo_ifindex; /* interface index of the loopback device */
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u_int packets_read; /* count of packets read with recvfrom() */
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bpf_u_int32 oldmode; /* mode to restore when turning monitor mode off */
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char *mondevice; /* mac80211 monitor device we created */
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u_char *mmapbuf; /* memory-mapped region pointer */
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size_t mmapbuflen; /* size of region */
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u_int tp_version; /* version of tpacket_hdr for mmaped ring */
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u_int tp_hdrlen; /* hdrlen of tpacket_hdr for mmaped ring */
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u_char *oneshot_buffer; /* buffer for copy of packet */
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long proc_dropped; /* packets reported dropped by /proc/net/dev */
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#endif /* linux */
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#ifdef HAVE_DAG_API
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#ifdef HAVE_DAG_STREAMS_API
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u_char *dag_mem_bottom; /* DAG card current memory bottom pointer */
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u_char *dag_mem_top; /* DAG card current memory top pointer */
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#else /* HAVE_DAG_STREAMS_API */
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void *dag_mem_base; /* DAG card memory base address */
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u_int dag_mem_bottom; /* DAG card current memory bottom offset */
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u_int dag_mem_top; /* DAG card current memory top offset */
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#endif /* HAVE_DAG_STREAMS_API */
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int dag_fcs_bits; /* Number of checksum bits from link layer */
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int dag_offset_flags; /* Flags to pass to dag_offset(). */
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int dag_stream; /* DAG stream number */
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int dag_timeout; /* timeout specified to pcap_open_live.
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* Same as in linux above, introduce
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* generally? */
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#endif /* HAVE_DAG_API */
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#ifdef HAVE_SNF_API
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snf_handle_t snf_handle; /* opaque device handle */
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snf_ring_t snf_ring; /* opaque device ring handle */
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int snf_timeout;
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int snf_boardnum;
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#endif /*HAVE_SNF_API*/
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#ifdef HAVE_ZEROCOPY_BPF
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/*
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* Zero-copy read buffer -- for zero-copy BPF. 'buffer' above will
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* alternative between these two actual mmap'd buffers as required.
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* As there is a header on the front size of the mmap'd buffer, only
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* some of the buffer is exposed to libpcap as a whole via bufsize;
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* zbufsize is the true size. zbuffer tracks the current zbuf
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* assocated with buffer so that it can be used to decide which the
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* next buffer to read will be.
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*/
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u_char *zbuf1, *zbuf2, *zbuffer;
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u_int zbufsize;
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u_int zerocopy;
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u_int interrupted;
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struct timespec firstsel;
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/*
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* If there's currently a buffer being actively processed, then it is
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* referenced here; 'buffer' is also pointed at it, but offset by the
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* size of the header.
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*/
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struct bpf_zbuf_header *bzh;
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#endif /* HAVE_ZEROCOPY_BPF */
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};
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/*
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* Stuff to do when we close.
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*/
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#define MUST_CLEAR_PROMISC 0x00000001 /* clear promiscuous mode */
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#define MUST_CLEAR_RFMON 0x00000002 /* clear rfmon (monitor) mode */
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#define MUST_DELETE_MONIF 0x00000004 /* delete monitor-mode interface */
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struct pcap_opt {
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int buffer_size;
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char *source;
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int promisc;
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int rfmon;
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};
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/*
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* 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
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* Tru64 UNIX, and some versions of NetBSD pad FDDI packets to make everything
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* line up on a nice boundary.
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*/
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#ifdef __NetBSD__
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#include <sys/param.h> /* needed to declare __NetBSD_Version__ */
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#endif
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#if defined(ultrix) || defined(__osf__) || (defined(__NetBSD__) && __NetBSD_Version__ > 106000000)
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#define PCAP_FDDIPAD 3
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#endif
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typedef int (*activate_op_t)(pcap_t *);
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typedef int (*can_set_rfmon_op_t)(pcap_t *);
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typedef int (*read_op_t)(pcap_t *, int cnt, pcap_handler, u_char *);
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typedef int (*inject_op_t)(pcap_t *, const void *, size_t);
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typedef int (*setfilter_op_t)(pcap_t *, struct bpf_program *);
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typedef int (*setdirection_op_t)(pcap_t *, pcap_direction_t);
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typedef int (*set_datalink_op_t)(pcap_t *, int);
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typedef int (*getnonblock_op_t)(pcap_t *, char *);
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typedef int (*setnonblock_op_t)(pcap_t *, int, char *);
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typedef int (*stats_op_t)(pcap_t *, struct pcap_stat *);
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#ifdef WIN32
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typedef int (*setbuff_op_t)(pcap_t *, int);
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typedef int (*setmode_op_t)(pcap_t *, int);
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typedef int (*setmintocopy_op_t)(pcap_t *, int);
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#endif
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typedef void (*cleanup_op_t)(pcap_t *);
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struct pcap {
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#ifdef WIN32
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ADAPTER *adapter;
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LPPACKET Packet;
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int nonblock;
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#else
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int fd;
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int selectable_fd;
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int send_fd;
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#endif /* WIN32 */
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#ifdef HAVE_LIBDLPI
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dlpi_handle_t dlpi_hd;
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#endif
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int snapshot;
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int linktype; /* Network linktype */
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int linktype_ext; /* Extended information stored in the linktype field of a file */
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int tzoff; /* timezone offset */
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int offset; /* offset for proper alignment */
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int activated; /* true if the capture is really started */
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int oldstyle; /* if we're opening with pcap_open_live() */
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int break_loop; /* flag set to force break from packet-reading loop */
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#ifdef PCAP_FDDIPAD
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int fddipad;
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#endif
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#ifdef MSDOS
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void (*wait_proc)(void); /* call proc while waiting */
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#endif
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struct pcap_sf sf;
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struct pcap_md md;
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struct pcap_opt opt;
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/*
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* Read buffer.
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*/
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int bufsize;
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u_char *buffer;
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u_char *bp;
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int cc;
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/*
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* Place holder for pcap_next().
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*/
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u_char *pkt;
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/* We're accepting only packets in this direction/these directions. */
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pcap_direction_t direction;
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/*
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* Methods.
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*/
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activate_op_t activate_op;
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can_set_rfmon_op_t can_set_rfmon_op;
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read_op_t read_op;
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inject_op_t inject_op;
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setfilter_op_t setfilter_op;
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setdirection_op_t setdirection_op;
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set_datalink_op_t set_datalink_op;
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getnonblock_op_t getnonblock_op;
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setnonblock_op_t setnonblock_op;
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stats_op_t stats_op;
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/*
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* Routine to use as callback for pcap_next()/pcap_next_ex().
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*/
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pcap_handler oneshot_callback;
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#ifdef WIN32
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/*
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* These are, at least currently, specific to the Win32 NPF
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* driver.
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*/
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setbuff_op_t setbuff_op;
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setmode_op_t setmode_op;
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setmintocopy_op_t setmintocopy_op;
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#endif
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cleanup_op_t cleanup_op;
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/*
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* Placeholder for filter code if bpf not in kernel.
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*/
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struct bpf_program fcode;
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char errbuf[PCAP_ERRBUF_SIZE + 1];
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int dlt_count;
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u_int *dlt_list;
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struct pcap_pkthdr pcap_header; /* This is needed for the pcap_next_ex() to work */
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};
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/*
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* This is a timeval as stored in a savefile.
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* It has to use the same types everywhere, independent of the actual
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* `struct timeval'; `struct timeval' has 32-bit tv_sec values on some
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* platforms and 64-bit tv_sec values on other platforms, and writing
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* out native `struct timeval' values would mean files could only be
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* read on systems with the same tv_sec size as the system on which
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* the file was written.
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*/
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struct pcap_timeval {
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bpf_int32 tv_sec; /* seconds */
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bpf_int32 tv_usec; /* microseconds */
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};
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/*
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* This is a `pcap_pkthdr' as actually stored in a savefile.
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*
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* Do not change the format of this structure, in any way (this includes
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* changes that only affect the length of fields in this structure),
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* and do not make the time stamp anything other than seconds and
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* microseconds (e.g., seconds and nanoseconds). Instead:
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*
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* introduce a new structure for the new format;
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*
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* send mail to "tcpdump-workers@lists.tcpdump.org", requesting
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* a new magic number for your new capture file format, and, when
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* you get the new magic number, put it in "savefile.c";
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*
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* use that magic number for save files with the changed record
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* header;
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*
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* make the code in "savefile.c" capable of reading files with
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* the old record header as well as files with the new record header
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* (using the magic number to determine the header format).
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*
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* Then supply the changes as a patch at
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*
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* http://sourceforge.net/projects/libpcap/
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*
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* so that future versions of libpcap and programs that use it (such as
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* tcpdump) will be able to read your new capture file format.
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*/
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struct pcap_sf_pkthdr {
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struct pcap_timeval ts; /* time stamp */
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bpf_u_int32 caplen; /* length of portion present */
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bpf_u_int32 len; /* length this packet (off wire) */
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};
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/*
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* How a `pcap_pkthdr' is actually stored in savefiles written
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* by some patched versions of libpcap (e.g. the ones in Red
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* Hat Linux 6.1 and 6.2).
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*
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* Do not change the format of this structure, in any way (this includes
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* changes that only affect the length of fields in this structure).
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* Instead, introduce a new structure, as per the above.
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*/
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struct pcap_sf_patched_pkthdr {
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struct pcap_timeval ts; /* time stamp */
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bpf_u_int32 caplen; /* length of portion present */
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bpf_u_int32 len; /* length this packet (off wire) */
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int index;
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unsigned short protocol;
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unsigned char pkt_type;
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};
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/*
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* User data structure for the one-shot callback used for pcap_next()
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* and pcap_next_ex().
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*/
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struct oneshot_userdata {
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struct pcap_pkthdr *hdr;
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const u_char **pkt;
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pcap_t *pd;
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};
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int yylex(void);
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#ifndef min
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#define min(a, b) ((a) > (b) ? (b) : (a))
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#endif
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/* XXX should these be in pcap.h? */
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int pcap_offline_read(pcap_t *, int, pcap_handler, u_char *);
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int pcap_read(pcap_t *, int cnt, pcap_handler, u_char *);
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#ifndef HAVE_STRLCPY
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#define strlcpy(x, y, z) \
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(strncpy((x), (y), (z)), \
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((z) <= 0 ? 0 : ((x)[(z) - 1] = '\0')), \
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strlen((y)))
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#endif
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#include <stdarg.h>
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#if !defined(HAVE_SNPRINTF)
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#define snprintf pcap_snprintf
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extern int snprintf (char *, size_t, const char *, ...);
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#endif
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#if !defined(HAVE_VSNPRINTF)
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#define vsnprintf pcap_vsnprintf
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extern int vsnprintf (char *, size_t, const char *, va_list ap);
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#endif
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/*
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* Routines that most pcap implementations can use for non-blocking mode.
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*/
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#if !defined(WIN32) && !defined(MSDOS)
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int pcap_getnonblock_fd(pcap_t *, char *);
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int pcap_setnonblock_fd(pcap_t *p, int, char *);
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#endif
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pcap_t *pcap_create_common(const char *, char *);
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int pcap_do_addexit(pcap_t *);
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void pcap_add_to_pcaps_to_close(pcap_t *);
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void pcap_remove_from_pcaps_to_close(pcap_t *);
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void pcap_cleanup_live_common(pcap_t *);
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int pcap_not_initialized(pcap_t *);
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int pcap_check_activated(pcap_t *);
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/*
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* Internal interfaces for "pcap_findalldevs()".
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*
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* "pcap_platform_finddevs()" is a platform-dependent routine to
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* add devices not found by the "standard" mechanisms (SIOCGIFCONF,
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* "getifaddrs()", etc..
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*
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* "pcap_add_if()" adds an interface to the list of interfaces.
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*/
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int pcap_platform_finddevs(pcap_if_t **, char *);
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int add_addr_to_iflist(pcap_if_t **, const char *, u_int, struct sockaddr *,
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size_t, struct sockaddr *, size_t, struct sockaddr *, size_t,
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struct sockaddr *, size_t, char *);
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int pcap_add_if(pcap_if_t **, const char *, u_int, const char *, char *);
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struct sockaddr *dup_sockaddr(struct sockaddr *, size_t);
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int add_or_find_if(pcap_if_t **, pcap_if_t **, const char *, u_int,
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const char *, char *);
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#ifdef WIN32
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char *pcap_win32strerror(void);
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#endif
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int install_bpf_program(pcap_t *, struct bpf_program *);
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int pcap_strcasecmp(const char *, const char *);
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#ifdef __cplusplus
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}
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#endif
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#endif
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