Update config.{guess,sub}, timestamps 2023-01-01,2023-01-21

[libpcap] / pcap-int.h

diff --git a/pcap-int.h b/pcap-int.h
index 3a0fbe6ae502681103a0ddf19897abc75f7b29b9..894e74afa85305b1db1524ff251670aba9a71b50 100644 (file)
--- a/pcap-int.h
+++ b/pcap-int.h
@@ -29,99 +29,281 @@
  * 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.
  * 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 1.52 2003-07-25 05:32:03 guy Exp $ (LBL)

  */
 
 #ifndef pcap_int_h
  */
 
 #ifndef pcap_int_h

-#define pcap_int_h
+#define        pcap_int_h
+
+#include <stddef.h>
+
+#include <signal.h>
+
+#include <pcap/pcap.h>
+
+#ifdef MSDOS
+  #include <fcntl.h>
+  #include <io.h>
+#endif
+
+#include "varattrs.h"
+#include "fmtutils.h"
+
+#include <stdarg.h>
+
+#include "portability.h"
+
+/*
+ * If we're compiling with Visual Studio, make sure we have at least
+ * VS 2015 or later, so we have sufficient C99 support.
+ *
+ * XXX - verify that we have at least C99 support on UN*Xes?
+ *
+ * What about MinGW or various DOS toolchains?  We're currently assuming
+ * sufficient C99 support there.
+ */
+#if defined(_MSC_VER)
+  /*
+   * Compiler is MSVC.  Make sure we have VS 2015 or later.
+   */
+  #if _MSC_VER < 1900
+    #error "Building libpcap requires VS 2015 or later"
+  #endif
+#endif
+
+/*
+ * Version string.
+ * Uses PACKAGE_VERSION from config.h.
+ */
+#define PCAP_VERSION_STRING "libpcap version " PACKAGE_VERSION

 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 

-#include <pcap.h>
+/*
+ * If pcap_new_api is set, we disable pcap_lookupdev(), because:
+ *
+ *    it's not thread-safe, and is marked as deprecated, on all
+ *    platforms;
+ *
+ *    on Windows, it may return UTF-16LE strings, which the program
+ *    might then pass to pcap_create() (or to pcap_open_live(), which
+ *    then passes them to pcap_create()), requiring pcap_create() to
+ *    check for UTF-16LE strings using a hack, and that hack 1)
+ *    *cannot* be 100% reliable and 2) runs the risk of going past the
+ *    end of the string.
+ *
+ * We keep it around in legacy mode for compatibility.
+ *
+ * We also disable the aforementioned hack in pcap_create().
+ */
+extern int pcap_new_api;

 
 

-#ifdef WIN32
-#include <packet32.h>
-#endif /* WIN32 */
+/*
+ * If pcap_utf_8_mode is set, on Windows we treat strings as UTF-8.
+ *
+ * On UN*Xes, we assume all strings are and should be in UTF-8, regardless
+ * of the setting of this flag.
+ */
+extern int pcap_utf_8_mode;

 
 /*
 
 /*

- * Savefile
+ * Swap byte ordering of unsigned long long timestamp on a big endian
+ * machine.

  */
  */

-struct pcap_sf {
-       FILE *rfile;
-       int swapped;
-       int hdrsize;
-       int version_major;
-       int version_minor;
-       u_char *base;
-};
+#define SWAPLL(ull)  ((ull & 0xff00000000000000ULL) >> 56) | \
+                      ((ull & 0x00ff000000000000ULL) >> 40) | \
+                      ((ull & 0x0000ff0000000000ULL) >> 24) | \
+                      ((ull & 0x000000ff00000000ULL) >> 8)  | \
+                      ((ull & 0x00000000ff000000ULL) << 8)  | \
+                      ((ull & 0x0000000000ff0000ULL) << 24) | \
+                      ((ull & 0x000000000000ff00ULL) << 40) | \
+                      ((ull & 0x00000000000000ffULL) << 56)

 
 

-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 */
-#ifdef linux
-       int     sock_packet;    /* using Linux 2.0 compatible interface */
-       int     timeout;        /* timeout specified to pcap_open_live */
-       int     clear_promisc;  /* must clear promiscuous mode when we close */
-       int     cooked;         /* using SOCK_DGRAM rather than SOCK_RAW */
-       int     lo_ifindex;     /* interface index of the loopback device */
-       char    *device;        /* device name */
-       struct pcap *next;      /* list of open promiscuous sock_packet pcaps */
-#endif
+/*
+ * Maximum snapshot length.
+ *
+ * Somewhat arbitrary, but chosen to be:
+ *
+ *    1) big enough for maximum-size Linux loopback packets (65549)
+ *       and some USB packets captured with USBPcap:
+ *
+ *           https://desowin.org/usbpcap/
+ *
+ *       (> 131072, < 262144)
+ *
+ * and
+ *
+ *    2) small enough not to cause attempts to allocate huge amounts of
+ *       memory; some applications might use the snapshot length in a
+ *       savefile header to control the size of the buffer they allocate,
+ *       so a size of, say, 2^31-1 might not work well.  (libpcap uses it
+ *       as a hint, but doesn't start out allocating a buffer bigger than
+ *       2 KiB, and grows the buffer as necessary, but not beyond the
+ *       per-linktype maximum snapshot length.  Other code might naively
+ *       use it; we want to avoid writing a too-large snapshot length,
+ *       in order not to cause that code problems.)
+ *
+ * We don't enforce this in pcap_set_snaplen(), but we use it internally.
+ */
+#define MAXIMUM_SNAPLEN                262144

 
 

-#ifdef HAVE_DAG_API
-       void    *dag_mem_base;  /* DAG card memory base address */
-       u_int   dag_mem_bottom; /* DAG card current memory bottom pointer */
-       u_int   dag_mem_top;    /* DAG card current memory top pointer */
+/*
+ * Locale-independent macros for testing character types.
+ * These can be passed any integral value, without worrying about, for
+ * example, sign-extending char values, unlike the C macros.
+ */
+#define PCAP_ISDIGIT(c) \
+       ((c) >= '0' && (c) <= '9')
+#define PCAP_ISXDIGIT(c) \
+       (((c) >= '0' && (c) <= '9') || \
+        ((c) >= 'A' && (c) <= 'F') || \
+        ((c) >= 'a' && (c) <= 'f'))
+
+struct pcap_opt {
+       char    *device;
+       int     timeout;        /* timeout for buffering */
+       u_int   buffer_size;
+       int     promisc;
+       int     rfmon;          /* monitor mode */
+       int     immediate;      /* immediate mode - deliver packets as soon as they arrive */
+       int     nonblock;       /* non-blocking mode - don't wait for packets to be delivered, return "no packets available" */
+       int     tstamp_type;
+       int     tstamp_precision;
+
+       /*
+        * Platform-dependent options.
+        */
+#ifdef __linux__
+       int     protocol;       /* protocol to use when creating PF_PACKET socket */
+#endif
+#ifdef _WIN32
+       int     nocapture_local;/* disable NPF loopback */

 #endif
 };
 
 #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    (*next_packet_op_t)(pcap_t *, struct pcap_pkthdr *, u_char **);
+typedef int    (*inject_op_t)(pcap_t *, const void *, int);
+typedef void   (*save_current_filter_op_t)(pcap_t *, const char *);
+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 *);
+typedef int    (*setnonblock_op_t)(pcap_t *, int);
+typedef int    (*stats_op_t)(pcap_t *, struct pcap_stat *);
+typedef void   (*breakloop_op_t)(pcap_t *);
+#ifdef _WIN32
+typedef struct pcap_stat *(*stats_ex_op_t)(pcap_t *, int *);
+typedef int    (*setbuff_op_t)(pcap_t *, int);
+typedef int    (*setmode_op_t)(pcap_t *, int);
+typedef int    (*setmintocopy_op_t)(pcap_t *, int);
+typedef HANDLE (*getevent_op_t)(pcap_t *);
+typedef int    (*oid_get_request_op_t)(pcap_t *, bpf_u_int32, void *, size_t *);
+typedef int    (*oid_set_request_op_t)(pcap_t *, bpf_u_int32, const void *, size_t *);
+typedef u_int  (*sendqueue_transmit_op_t)(pcap_t *, pcap_send_queue *, int);
+typedef int    (*setuserbuffer_op_t)(pcap_t *, int);
+typedef int    (*live_dump_op_t)(pcap_t *, char *, int, int);
+typedef int    (*live_dump_ended_op_t)(pcap_t *, int);
+typedef PAirpcapHandle (*get_airpcap_handle_op_t)(pcap_t *);
+#endif
+typedef void   (*cleanup_op_t)(pcap_t *);
+
+/*
+ * We put all the stuff used in the read code path at the beginning,
+ * to try to keep it together in the same cache line or lines.
+ */

 struct pcap {
 struct pcap {

-#ifdef WIN32
-       ADAPTER *adapter;
-       LPPACKET Packet;
-       int timeout;
-       int nonblock;
+       /*
+        * Method to call to read packets on a live capture.
+        */
+       read_op_t read_op;
+
+       /*
+        * Method to call to read the next packet from a savefile.
+        */
+       next_packet_op_t next_packet_op;
+
+#ifdef _WIN32
+       HANDLE handle;

 #else
        int fd;
 #else
        int fd;

-#endif /* WIN32 */
-       int snapshot;
-       int linktype;
-       int tzoff;              /* timezone offset */
-       int offset;             /* offset for proper alignment */
-
-       struct pcap_sf sf;
-       struct pcap_md md;
+#endif /* _WIN32 */

 
        /*
         * Read buffer.
         */
 
        /*
         * Read buffer.
         */

-       int bufsize;
-       u_char *buffer;
+       u_int bufsize;
+       void *buffer;

        u_char *bp;
        int cc;
 
        u_char *bp;
        int cc;
 

+       sig_atomic_t break_loop; /* flag set to force break from packet-reading loop */
+
+       void *priv;             /* private data for methods */
+
+#ifdef ENABLE_REMOTE
+       struct pcap_samp rmt_samp;      /* parameters related to the sampling process. */
+#endif
+
+       int swapped;
+       FILE *rfile;            /* null if live capture, non-null if savefile */
+       u_int fddipad;
+       struct pcap *next;      /* list of open pcaps that need stuff cleared on close */
+
+       /*
+        * File version number; meaningful only for a savefile, but we
+        * keep it here so that apps that (mistakenly) ask for the
+        * version numbers will get the same zero values that they
+        * always did.
+        */
+       int version_major;
+       int version_minor;
+
+       int snapshot;
+       int linktype;           /* Network linktype */
+       int linktype_ext;       /* Extended information stored in the linktype field of a file */
+       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() */
+
+       struct pcap_opt opt;
+

        /*
         * Place holder for pcap_next().
         */
        u_char *pkt;
 
        /*
         * Place holder for pcap_next().
         */
        u_char *pkt;
 

+#ifdef _WIN32
+       struct pcap_stat stat;  /* used for pcap_stats_ex() */
+#endif
+
+       /* We're accepting only packets in this direction/these directions. */
+       pcap_direction_t direction;
+

        /*
        /*

-        * Methods.
+        * Flags to affect BPF code generation.

         */
         */

-       int     (*read_op)(pcap_t *, int cnt, pcap_handler, u_char *);
-       int     (*setfilter_op)(pcap_t *, struct bpf_program *);
-       int     (*set_datalink_op)(pcap_t *, int);
-       int     (*stats_op)(pcap_t *, struct pcap_stat *);
-       void    (*close_op)(pcap_t *);
+       int bpf_codegen_flags;
+
+#if !defined(_WIN32) && !defined(MSDOS)
+       int selectable_fd;      /* FD on which select()/poll()/epoll_wait()/kevent()/etc. can be done */
+
+       /*
+        * In case there either is no selectable FD, or there is but
+        * it doesn't necessarily work (e.g., if it doesn't get notified
+        * if the packet capture timeout expires before the buffer
+        * fills up), this points to a timeout that should be used
+        * in select()/poll()/epoll_wait()/kevent() call.  The pcap_t should
+        * be put into non-blocking mode, and, if the timeout expires on
+        * the call, an attempt should be made to read packets from all
+        * pcap_t's with a required timeout, and the code must be
+        * prepared not to see any packets from the attempt.
+        */
+       const struct timeval *required_select_timeout;
+#endif

 
        /*
         * Placeholder for filter code if bpf not in kernel.
 
        /*
         * Placeholder for filter code if bpf not in kernel.


@@ -129,16 +311,72 @@ struct pcap {
        struct bpf_program fcode;
 
        char errbuf[PCAP_ERRBUF_SIZE + 1];
        struct bpf_program fcode;
 
        char errbuf[PCAP_ERRBUF_SIZE + 1];

+#ifdef _WIN32
+       char acp_errbuf[PCAP_ERRBUF_SIZE + 1];  /* buffer for local code page error strings */
+#endif

        int dlt_count;
        int dlt_count;

-       int *dlt_list;
+       u_int *dlt_list;
+       int tstamp_type_count;
+       u_int *tstamp_type_list;
+       int tstamp_precision_count;
+       u_int *tstamp_precision_list;

 
        struct pcap_pkthdr pcap_header; /* This is needed for the pcap_next_ex() to work */
 
        struct pcap_pkthdr pcap_header; /* This is needed for the pcap_next_ex() to work */

+
+       /*
+        * More methods.
+        */
+       activate_op_t activate_op;
+       can_set_rfmon_op_t can_set_rfmon_op;
+       inject_op_t inject_op;
+       save_current_filter_op_t save_current_filter_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;
+       breakloop_op_t breakloop_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.
+        */
+       stats_ex_op_t stats_ex_op;
+       setbuff_op_t setbuff_op;
+       setmode_op_t setmode_op;
+       setmintocopy_op_t setmintocopy_op;
+       getevent_op_t getevent_op;
+       oid_get_request_op_t oid_get_request_op;
+       oid_set_request_op_t oid_set_request_op;
+       sendqueue_transmit_op_t sendqueue_transmit_op;
+       setuserbuffer_op_t setuserbuffer_op;
+       live_dump_op_t live_dump_op;
+       live_dump_ended_op_t live_dump_ended_op;
+       get_airpcap_handle_op_t get_airpcap_handle_op;
+#endif
+       cleanup_op_t cleanup_op;

 };
 
 /*
 };
 
 /*

- * This is a timeval as stored in disk in a dumpfile.
+ * BPF code generation flags.
+ */
+#define BPF_SPECIAL_VLAN_HANDLING      0x00000001      /* special VLAN handling for Linux */
+
+/*
+ * This is a timeval as stored in a savefile.

  * It has to use the same types everywhere, independent of the actual
  * It has to use the same types everywhere, independent of the actual

- * `struct timeval'
+ * `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 {
  */
 
 struct pcap_timeval {


@@ -147,7 +385,7 @@ struct pcap_timeval {
 };
 
 /*
 };
 
 /*

- * How a `pcap_pkthdr' is actually stored in the dumpfile.
+ * 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),
  *
  * Do not change the format of this structure, in any way (this includes
  * changes that only affect the length of fields in this structure),


@@ -156,8 +394,8 @@ struct pcap_timeval {
  *
  *     introduce a new structure for the new format;
  *
  *
  *     introduce a new structure for the new format;
  *

- *     send mail to "tcpdump-workers@tcpdump.org", requesting a new
- *     magic number for your new capture file format, and, when
+ *     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
  *     you get the new magic number, put it in "savefile.c";
  *
  *     use that magic number for save files with the changed record


@@ -167,19 +405,23 @@ struct pcap_timeval {
  *     the old record header as well as files with the new record header
  *     (using the magic number to determine the header format).
  *
  *     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 to "[email protected]", so that future
- * versions of libpcap and programs that use it (such as tcpdump) will
- * be able to read your new capture file format.
+ * Then supply the changes by forking the branch at
+ *
+ *     https://github.com/the-tcpdump-group/libpcap/tree/master
+ *
+ * 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 */
  */
 
 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) */
+    bpf_u_int32 len;           /* length of this packet (off wire) */

 };
 
 /*
 };
 
 /*

- * How a `pcap_pkthdr' is actually stored in dumpfiles written
+ * 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).
  *
  * by some patched versions of libpcap (e.g. the ones in Red
  * Hat Linux 6.1 and 6.2).
  *


@@ -191,76 +433,232 @@ struct pcap_sf_pkthdr {
 struct pcap_sf_patched_pkthdr {
     struct pcap_timeval ts;    /* time stamp */
     bpf_u_int32 caplen;                /* length of portion present */
 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) */
+    bpf_u_int32 len;           /* length of this packet (off wire) */

     int                index;
     unsigned short protocol;
     unsigned char pkt_type;
 };
 
     int                index;
     unsigned short protocol;
     unsigned char pkt_type;
 };
 

-int    yylex(void);
+/*
+ * 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;
+};

 
 #ifndef min
 #define min(a, b) ((a) > (b) ? (b) : (a))
 #endif
 
 
 #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_offline_read(pcap_t *, int, pcap_handler, u_char *);

-int    pcap_read(pcap_t *, int cnt, pcap_handler, u_char *);

 
 

+/*
+ * Does the packet count argument to a module's read routine say
+ * "supply packets until you run out of packets"?
+ */
+#define PACKET_COUNT_IS_UNLIMITED(count)       ((count) <= 0)

 
 /*
 
 /*

- * 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 NetBSD pad to make everything line up on a nice boundary.
+ * Routines that most pcap implementations can use for non-blocking mode.

  */
  */

-#if defined(ultrix) || defined(__osf__) || defined(__NetBSD__)
-#define       PCAP_FDDIPAD 3
+#if !defined(_WIN32) && !defined(MSDOS)
+int    pcap_getnonblock_fd(pcap_t *);
+int    pcap_setnonblock_fd(pcap_t *p, int);

 #endif
 
 #endif
 

-#ifndef HAVE_STRLCPY
-#define strlcpy(x, y, z) \
-       (strncpy((x), (y), (z)), \
-        ((z) <= 0 ? 0 : ((x)[(z) - 1] = '\0')), \
-        strlen((y)))
-#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 *);

 
 /*
 
 /*

- * Internal interface for "pcap_set_datalink()".  Attempts to set the
- * link-layer type to the specified type; if that fails, returns -1.
- * (On platforms that don't support setting it at all, this can just
- * return 0 - on those platforms, "pcap_set_datalink()" has already
- * checked whether the DLT_ value is the one the device supports.
+ * This wrapper takes an error buffer pointer and a type to use for the
+ * private data, and calls pcap_create_common(), passing it the error
+ * buffer pointer, the size for the private data type, in bytes, and the
+ * offset of the private data from the beginning of the structure, in
+ * bytes.

  */
  */

-int    pcap_set_datalink_platform(pcap_t *, int);
+#define PCAP_CREATE_COMMON(ebuf, type) \
+       pcap_create_common(ebuf, \
+           sizeof (struct { pcap_t __common; type __private; }), \
+           offsetof (struct { pcap_t __common; type __private; }, __private))
+pcap_t *pcap_create_common(char *, size_t, size_t);
+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_check_activated(pcap_t *);
+void   pcap_breakloop_common(pcap_t *);

 
 /*
  * Internal interfaces for "pcap_findalldevs()".
  *
 
 /*
  * Internal interfaces for "pcap_findalldevs()".
  *

- * "pcap_platform_finddevs()" is a platform-dependent routine to
- * add devices not found by the "standard" mechanisms (SIOCGIFCONF,
- * "getifaddrs()", etc..
+ * A pcap_if_list_t * is a reference to a list of devices.
+ *
+ * A get_if_flags_func is a platform-dependent function called to get
+ * additional interface flags.
+ *
+ * "pcap_platform_finddevs()" is the platform-dependent routine to
+ * find local network interfaces.
+ *
+ * "pcap_findalldevs_interfaces()" is a helper to find those interfaces
+ * using the "standard" mechanisms (SIOCGIFCONF, "getifaddrs()", etc.).
+ *
+ * "add_dev()" adds an entry to a pcap_if_list_t.
+ *
+ * "find_dev()" tries to find a device, by name, in a pcap_if_list_t.
+ *
+ * "find_or_add_dev()" checks whether a device is already in a pcap_if_list_t
+ * and, if not, adds an entry for it.
+ */
+struct pcap_if_list;
+typedef struct pcap_if_list pcap_if_list_t;
+typedef int (*get_if_flags_func)(const char *, bpf_u_int32 *, char *);
+int    pcap_platform_finddevs(pcap_if_list_t *, char *);
+#if !defined(_WIN32) && !defined(MSDOS)
+int    pcap_findalldevs_interfaces(pcap_if_list_t *, char *,
+           int (*)(const char *), get_if_flags_func);
+#endif
+pcap_if_t *find_or_add_dev(pcap_if_list_t *, const char *, bpf_u_int32,
+           get_if_flags_func, const char *, char *);
+pcap_if_t *find_dev(pcap_if_list_t *, const char *);
+pcap_if_t *add_dev(pcap_if_list_t *, const char *, bpf_u_int32, const char *,
+           char *);
+int    add_addr_to_dev(pcap_if_t *, struct sockaddr *, size_t,
+           struct sockaddr *, size_t, struct sockaddr *, size_t,
+           struct sockaddr *dstaddr, size_t, char *errbuf);
+#ifndef _WIN32
+pcap_if_t *find_or_add_if(pcap_if_list_t *, const char *, bpf_u_int32,
+           get_if_flags_func, char *);
+int    add_addr_to_if(pcap_if_list_t *, const char *, bpf_u_int32,
+           get_if_flags_func,
+           struct sockaddr *, size_t, struct sockaddr *, size_t,
+           struct sockaddr *, size_t, struct sockaddr *, size_t, char *);
+#endif
+
+/*
+ * Internal interfaces for "pcap_open_offline()" and other savefile
+ * I/O routines.
+ *
+ * "pcap_open_offline_common()" allocates and fills in a pcap_t, for use
+ * by pcap_open_offline routines.
+ *
+ * "pcap_adjust_snapshot()" adjusts the snapshot to be non-zero and
+ * fit within an int.
+ *
+ * "sf_cleanup()" closes the file handle associated with a pcap_t, if
+ * appropriate, and frees all data common to all modules for handling
+ * savefile types.

  *
  *

- * "pcap_add_if()" adds an interface to the list of interfaces.
+ * "charset_fopen()", in UTF-8 mode on Windows, does an fopen() that
+ * treats the pathname as being in UTF-8, rather than the local
+ * code page, on Windows.
+ */
+
+/*
+ * This wrapper takes an error buffer pointer and a type to use for the
+ * private data, and calls pcap_create_common(), passing it the error
+ * buffer pointer, the size for the private data type, in bytes, and the
+ * offset of the private data from the beginning of the structure, in
+ * bytes.
+ */
+#define PCAP_OPEN_OFFLINE_COMMON(ebuf, type) \
+       pcap_open_offline_common(ebuf, \
+           sizeof (struct { pcap_t __common; type __private; }), \
+           offsetof (struct { pcap_t __common; type __private; }, __private))
+pcap_t *pcap_open_offline_common(char *ebuf, size_t total_size,
+    size_t private_data);
+bpf_u_int32 pcap_adjust_snapshot(bpf_u_int32 linktype, bpf_u_int32 snaplen);
+void   sf_cleanup(pcap_t *p);
+#ifdef _WIN32
+FILE   *charset_fopen(const char *path, const char *mode);
+#else
+/*
+ * On other OSes, just use Boring Old fopen().

  */
  */

-int    pcap_platform_finddevs(pcap_if_t **, char *);
-int    add_addr_to_iflist(pcap_if_t **, 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 **, 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);
+#define charset_fopen(path, mode)      fopen((path), (mode))

 #endif
 
 #endif
 

-/* XXX */
-extern int pcap_fddipad;
+/*
+ * Internal interfaces for loading code at run time.
+ */
+#ifdef _WIN32
+#define pcap_code_handle_t     HMODULE
+#define pcap_funcptr_t         FARPROC
+
+pcap_code_handle_t     pcap_load_code(const char *);
+pcap_funcptr_t         pcap_find_function(pcap_code_handle_t, const char *);
+#endif
+
+/*
+ * Internal interfaces for doing user-mode filtering of packets and
+ * validating filter programs.
+ */
+/*
+ * Auxiliary data, for use when interpreting a filter intended for the
+ * Linux kernel when the kernel rejects the filter (requiring us to
+ * run it in userland).  It contains VLAN tag information.
+ */
+struct pcap_bpf_aux_data {
+       u_short vlan_tag_present;
+       u_short vlan_tag;
+};
+
+/*
+ * Filtering routine that takes the auxiliary data as an additional
+ * argument.
+ */
+u_int  pcap_filter_with_aux_data(const struct bpf_insn *,
+    const u_char *, u_int, u_int, const struct pcap_bpf_aux_data *);
+
+/*
+ * Filtering routine that doesn't.
+ */
+u_int  pcap_filter(const struct bpf_insn *, const u_char *, u_int, u_int);
+
+/*
+ * Routine to validate a BPF program.
+ */
+int    pcap_validate_filter(const struct bpf_insn *, int);
+
+/*
+ * Internal interfaces for both "pcap_create()" and routines that
+ * open savefiles.
+ *
+ * "pcap_oneshot()" is the standard one-shot callback for "pcap_next()"
+ * and "pcap_next_ex()".
+ */
+void   pcap_oneshot(u_char *, const struct pcap_pkthdr *, const u_char *);

 
 int    install_bpf_program(pcap_t *, struct bpf_program *);
 
 int    pcap_strcasecmp(const char *, const char *);
 
 
 int    install_bpf_program(pcap_t *, struct bpf_program *);
 
 int    pcap_strcasecmp(const char *, const char *);
 

+/*
+ * Internal interfaces for pcap_createsrcstr and pcap_parsesrcstr with
+ * the additional bit of information regarding SSL support (rpcap:// vs.
+ * rpcaps://).
+ */
+int    pcap_createsrcstr_ex(char *, int, const char *, const char *,
+    const char *, unsigned char, char *);
+int    pcap_parsesrcstr_ex(const char *, int *, char *, char *,
+    char *, unsigned char *, char *);
+
+#ifdef YYDEBUG
+extern int pcap_debug;
+#endif
+

 #ifdef __cplusplus
 }
 #endif
 #ifdef __cplusplus
 }
 #endif