* 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
extern "C" {
#endif
-#ifdef WIN32
-#include <Packet32.h>
-extern CRITICAL_SECTION g_PcapCompileCriticalSection;
-#endif /* WIN32 */
-
-#ifdef MSDOS
-#include <fcntl.h>
-#include <io.h>
+#if defined(_WIN32)
+ /*
+ * Make sure Packet32.h doesn't define BPF structures that we've
+ * probably already defined as a result of including <pcap/pcap.h>.
+ */
+ #define BPF_MAJOR_VERSION
+ #include <Packet32.h>
+#elif defined(MSDOS)
+ #include <fcntl.h>
+ #include <io.h>
#endif
#if (defined(_MSC_VER) && (_MSC_VER <= 1200)) /* we are compiling with Visual Studio 6, that doesn't support the LL suffix*/
#endif /* _MSC_VER */
+/*
+ * 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:
+ *
+ * http://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.
+ *
+ * We don't enforce this in pcap_set_snaplen(), but we use it internally.
+ */
+#define MAXIMUM_SNAPLEN 262144
+
struct pcap_opt {
- char *source;
+ char *device;
int timeout; /* timeout for buffering */
int buffer_size;
int promisc;
int rfmon; /* monitor mode */
int immediate; /* immediate mode - deliver packets as soon as they arrive */
int tstamp_type;
+ int tstamp_precision;
};
typedef int (*activate_op_t)(pcap_t *);
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
+#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 *);
read_op_t read_op;
/*
- * Method to call to read to read packets from a savefile.
+ * Method to call to read packets from a savefile.
*/
int (*next_packet_op)(pcap_t *, struct pcap_pkthdr *, u_char **);
-#ifdef WIN32
+#ifdef _WIN32
ADAPTER *adapter;
- LPPACKET Packet;
- int nonblock;
#else
int fd;
int selectable_fd;
-#endif /* WIN32 */
+#endif /* _WIN32 */
/*
* Read buffer.
*/
int bufsize;
- u_char *buffer;
+ void *buffer;
u_char *bp;
int cc;
int break_loop; /* flag set to force break from packet-reading loop */
- void *private; /* private data for methods */
+ void *priv; /* private data for methods */
int swapped;
FILE *rfile; /* null if live capture, non-null if savefile */
*/
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;
+ /*
+ * Flags to affect BPF code generation.
+ */
+ int bpf_codegen_flags;
+
/*
* Placeholder for filter code if bpf not in kernel.
*/
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 */
*/
pcap_handler oneshot_callback;
-#ifdef WIN32
+#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;
};
+/*
+ * 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
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) \
#include <stdarg.h>
-#if !defined(HAVE_SNPRINTF)
-#define snprintf pcap_snprintf
-extern int snprintf (char *, size_t, const char *, ...);
+/*
+ * For flagging arguments as format strings in MSVC.
+ */
+#if _MSC_VER >= 1400
+ #include <sal.h>
+ #if _MSC_VER > 1400
+ #define FORMAT_STRING(p) _Printf_format_string_ p
+ #else
+ #define FORMAT_STRING(p) __format_string p
+ #endif
+#else
+ #define FORMAT_STRING(p) p
#endif
-#if !defined(HAVE_VSNPRINTF)
-#define vsnprintf pcap_vsnprintf
-extern int vsnprintf (char *, size_t, const char *, va_list ap);
+/*
+ * On Windows, snprintf(), with that name and with C99 behavior - i.e.,
+ * guaranteeing that the formatted string is null-terminated - didn't
+ * appear until Visual Studio 2015. Prior to that, the C runtime had
+ * only _snprintf(), which *doesn't* guarantee that the string is
+ * null-terminated if it is truncated due to the buffer being too
+ * small. We therefore can't just define snprintf to be _snprintf
+ * and define vsnprintf to be _vsnprintf, as we're relying on null-
+ * termination of strings in all cases.
+ *
+ * We also want to allow this to be built with versions of Visual Studio
+ * prior to VS 2015, so we can't rely on snprintf() being present.
+ *
+ * And we want to make sure that, if we support plugins in the future,
+ * a routine with C99 snprintf() behavior will be available to them.
+ * We also don't want it to collide with the C library snprintf() if
+ * there is one.
+ *
+ * So we make pcap_snprintf() and pcap_vsnprintf() available, either by
+ * #defining them to be snprintf or vsnprintf, respectively, or by
+ * defining our own versions and exporting them.
+ */
+#ifdef HAVE_SNPRINTF
+#define pcap_snprintf snprintf
+#else
+extern int pcap_snprintf(char *, size_t, FORMAT_STRING(const char *), ...);
#endif
+#ifdef HAVE_VSNPRINTF
+#define pcap_vsnprintf vsnprintf
+#else
+extern int pcap_vsnprintf(char *, size_t, const char *, va_list ap);
+#endif
+
+/*
+ * 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)
+
/*
* Routines that most pcap implementations can use for non-blocking mode.
*/
-#if !defined(WIN32) && !defined(MSDOS)
+#if !defined(_WIN32) && !defined(MSDOS)
int pcap_getnonblock_fd(pcap_t *, char *);
int pcap_setnonblock_fd(pcap_t *p, int, char *);
#endif
* by pcap_create routines.
*/
pcap_t *pcap_create_interface(const char *, char *);
-pcap_t *pcap_create_common(const char *, char *, size_t);
+pcap_t *pcap_create_common(char *, 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_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.
+ * find local network interfaces.
+ *
+ * "pcap_findalldevs_interfaces()" is a helper to find those interfaces
+ * using the "standard" mechanisms (SIOCGIFCONF, "getifaddrs()", etc.).
*
* "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,
+#if !defined(_WIN32) && !defined(MSDOS)
+int pcap_findalldevs_interfaces(pcap_if_t **, char *,
+ int (*)(const char *));
+#endif
+int add_addr_to_iflist(pcap_if_t **, const char *, bpf_u_int32,
+ struct sockaddr *, size_t, struct sockaddr *, size_t,
+ struct sockaddr *, size_t, struct sockaddr *, size_t, 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);
+int pcap_add_if(pcap_if_t **, const char *, bpf_u_int32, const char *,
+ char *);
+int add_or_find_if(pcap_if_t **, pcap_if_t **, const char *, bpf_u_int32,
const char *, char *);
+#ifndef _WIN32
+bpf_u_int32 if_flags_to_pcap_flags(const char *, u_int);
+#endif
/*
* Internal interfaces for "pcap_open_offline()".
*
* "pcap_open_offline_common()" allocates and fills in a pcap_t, for use
* by pcap_open_offline routines.
+ *
+ * "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_t *pcap_open_offline_common(char *ebuf, size_t size);
+void sf_cleanup(pcap_t *p);
+
+/*
+ * 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 *);
-#ifdef WIN32
-char *pcap_win32strerror(void);
+#ifdef _WIN32
+void pcap_win32_err_to_str(DWORD, char *);
#endif
int install_bpf_program(pcap_t *, struct bpf_program *);
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