X-Git-Url: https://git.tcpdump.org/libpcap/blobdiff_plain/9792990eb80889004b39ee70caa98b3d91ac8012..09b51d326c38ea8e10ce4da09c09d50e08c5aeb8:/pcap-int.h diff --git a/pcap-int.h b/pcap-int.h index 355e5036..894e74af 100644 --- a/pcap-int.h +++ b/pcap-int.h @@ -29,97 +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. - * - * @(#) $Header: /tcpdump/master/libpcap/pcap-int.h,v 1.49 2003-07-25 04:04:57 guy Exp $ (LBL) */ #ifndef pcap_int_h -#define pcap_int_h +#define pcap_int_h + +#include + +#include + +#include + +#ifdef MSDOS + #include + #include +#endif + +#include "varattrs.h" +#include "fmtutils.h" + +#include + +#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 -#include +/* + * 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 -#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 - int is_dag; /* this is a dag card handle */ - 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 }; +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 { -#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; -#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. */ - int bufsize; - u_char *buffer; + u_int bufsize; + void *buffer; 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; +#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 (*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. @@ -127,16 +311,72 @@ struct pcap { 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_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 */ + + /* + * 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 - * `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 { @@ -145,7 +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), @@ -154,8 +394,8 @@ struct pcap_timeval { * * 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 @@ -165,19 +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). * - * Then supply the changes to "patches@tcpdump.org", so that future - * versions of libpcap and programs that use it (such as tcpdump) will - * be able to read your new capture file format. + * 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 */ - 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). * @@ -189,76 +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 */ - 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 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 -/* 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 *); +/* + * 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 -#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()". * - * "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 -/* 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 *); +/* + * 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