1 /* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */
3 * Copyright (c) 1993, 1994, 1995, 1996, 1997
4 * The Regents of the University of California. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by the Computer Systems
17 * Engineering Group at Lawrence Berkeley Laboratory.
18 * 4. Neither the name of the University nor of the Laboratory may be used
19 * to endorse or promote products derived from this software without
20 * specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * Remote packet capture mechanisms and extensions from WinPcap:
38 * Copyright (c) 2002 - 2003
39 * NetGroup, Politecnico di Torino (Italy)
40 * All rights reserved.
42 * Redistribution and use in source and binary forms, with or without
43 * modification, are permitted provided that the following conditions
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
51 * 3. Neither the name of the Politecnico di Torino nor the names of its
52 * contributors may be used to endorse or promote products derived from
53 * this software without specific prior written permission.
55 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
56 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
57 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
58 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
59 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
60 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
61 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
62 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
63 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
64 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
65 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
69 #ifndef lib_pcap_pcap_h
70 #define lib_pcap_pcap_h
72 #include <pcap/funcattrs.h>
74 #include <pcap/pcap-inttypes.h>
77 #include <winsock2.h> /* u_int, u_char etc. */
78 #include <io.h> /* _get_osfhandle() */
80 #include <sys/types.h> /* u_int, u_char etc. */
81 #include <sys/socket.h>
83 #include <sys/types.h> /* u_int, u_char etc. */
85 #endif /* _WIN32/MSDOS/UN*X */
87 #include <pcap/socket.h> /* for SOCKET, as the active-mode rpcap APIs use it */
89 #ifndef PCAP_DONT_INCLUDE_PCAP_BPF_H
100 * Version number of the current version of the pcap file format.
102 * NOTE: this is *NOT* the version number of the libpcap library.
103 * To fetch the version information for the version of libpcap
104 * you're using, use pcap_lib_version().
106 #define PCAP_VERSION_MAJOR 2
107 #define PCAP_VERSION_MINOR 4
109 #define PCAP_ERRBUF_SIZE 256
112 * Compatibility for systems that have a bpf.h that
113 * predates the bpf typedefs for 64-bit support.
115 #if BPF_RELEASE - 0 < 199406
116 typedef int bpf_int32;
117 typedef u_int bpf_u_int32;
120 typedef struct pcap pcap_t;
121 typedef struct pcap_dumper pcap_dumper_t;
122 typedef struct pcap_if pcap_if_t;
123 typedef struct pcap_addr pcap_addr_t;
126 * The first record in the file contains saved values for some
127 * of the flags used in the printout phases of tcpdump.
128 * Many fields here are 32 bit ints so compilers won't insert unwanted
129 * padding; these files need to be interchangeable across architectures.
131 * Do not change the layout of this structure, in any way (this includes
132 * changes that only affect the length of fields in this structure).
134 * Also, do not change the interpretation of any of the members of this
135 * structure, in any way (this includes using values other than
136 * LINKTYPE_ values, as defined in "savefile.c", in the "linktype"
141 * introduce a new structure for the new format, if the layout
142 * of the structure changed;
144 * send mail to "tcpdump-workers@lists.tcpdump.org", requesting
145 * a new magic number for your new capture file format, and, when
146 * you get the new magic number, put it in "savefile.c";
148 * use that magic number for save files with the changed file
151 * make the code in "savefile.c" capable of reading files with
152 * the old file header as well as files with the new file header
153 * (using the magic number to determine the header format).
155 * Then supply the changes by forking the branch at
157 * https://github.com/the-tcpdump-group/libpcap/issues
159 * and issuing a pull request, so that future versions of libpcap and
160 * programs that use it (such as tcpdump) will be able to read your new
161 * capture file format.
163 struct pcap_file_header {
165 u_short version_major;
166 u_short version_minor;
167 bpf_int32 thiszone; /* gmt to local correction */
168 bpf_u_int32 sigfigs; /* accuracy of timestamps */
169 bpf_u_int32 snaplen; /* max length saved portion of each pkt */
170 bpf_u_int32 linktype; /* data link type (LINKTYPE_*) */
174 * Macros for the value returned by pcap_datalink_ext().
176 * If LT_FCS_LENGTH_PRESENT(x) is true, the LT_FCS_LENGTH(x) macro
177 * gives the FCS length of packets in the capture.
179 #define LT_FCS_LENGTH_PRESENT(x) ((x) & 0x04000000)
180 #define LT_FCS_LENGTH(x) (((x) & 0xF0000000) >> 28)
181 #define LT_FCS_DATALINK_EXT(x) ((((x) & 0xF) << 28) | 0x04000000)
190 * Generic per-packet information, as supplied by libpcap.
192 * The time stamp can and should be a "struct timeval", regardless of
193 * whether your system supports 32-bit tv_sec in "struct timeval",
194 * 64-bit tv_sec in "struct timeval", or both if it supports both 32-bit
195 * and 64-bit applications. The on-disk format of savefiles uses 32-bit
196 * tv_sec (and tv_usec); this structure is irrelevant to that. 32-bit
197 * and 64-bit versions of libpcap, even if they're on the same platform,
198 * should supply the appropriate version of "struct timeval", even if
199 * that's not what the underlying packet capture mechanism supplies.
202 struct timeval ts; /* time stamp */
203 bpf_u_int32 caplen; /* length of portion present */
204 bpf_u_int32 len; /* length this packet (off wire) */
208 * As returned by the pcap_stats()
211 u_int ps_recv; /* number of packets received */
212 u_int ps_drop; /* number of packets dropped */
213 u_int ps_ifdrop; /* drops by interface -- only supported on some platforms */
215 u_int ps_capt; /* number of packets that reach the application */
216 u_int ps_sent; /* number of packets sent by the server on the network */
217 u_int ps_netdrop; /* number of packets lost on the network */
223 * As returned by the pcap_stats_ex()
225 struct pcap_stat_ex {
226 u_long rx_packets; /* total packets received */
227 u_long tx_packets; /* total packets transmitted */
228 u_long rx_bytes; /* total bytes received */
229 u_long tx_bytes; /* total bytes transmitted */
230 u_long rx_errors; /* bad packets received */
231 u_long tx_errors; /* packet transmit problems */
232 u_long rx_dropped; /* no space in Rx buffers */
233 u_long tx_dropped; /* no space available for Tx */
234 u_long multicast; /* multicast packets received */
237 /* detailed rx_errors: */
238 u_long rx_length_errors;
239 u_long rx_over_errors; /* receiver ring buff overflow */
240 u_long rx_crc_errors; /* recv'd pkt with crc error */
241 u_long rx_frame_errors; /* recv'd frame alignment error */
242 u_long rx_fifo_errors; /* recv'r fifo overrun */
243 u_long rx_missed_errors; /* recv'r missed packet */
245 /* detailed tx_errors */
246 u_long tx_aborted_errors;
247 u_long tx_carrier_errors;
248 u_long tx_fifo_errors;
249 u_long tx_heartbeat_errors;
250 u_long tx_window_errors;
255 * Item in a list of interfaces.
258 struct pcap_if *next;
259 char *name; /* name to hand to "pcap_open_live()" */
260 char *description; /* textual description of interface, or NULL */
261 struct pcap_addr *addresses;
262 bpf_u_int32 flags; /* PCAP_IF_ interface flags */
265 #define PCAP_IF_LOOPBACK 0x00000001 /* interface is loopback */
266 #define PCAP_IF_UP 0x00000002 /* interface is up */
267 #define PCAP_IF_RUNNING 0x00000004 /* interface is running */
268 #define PCAP_IF_WIRELESS 0x00000008 /* interface is wireless (*NOT* necessarily Wi-Fi!) */
269 #define PCAP_IF_CONNECTION_STATUS 0x00000030 /* connection status: */
270 #define PCAP_IF_CONNECTION_STATUS_UNKNOWN 0x00000000 /* unknown */
271 #define PCAP_IF_CONNECTION_STATUS_CONNECTED 0x00000010 /* connected */
272 #define PCAP_IF_CONNECTION_STATUS_DISCONNECTED 0x00000020 /* disconnected */
273 #define PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE 0x00000030 /* not applicable */
276 * Representation of an interface address.
279 struct pcap_addr *next;
280 struct sockaddr *addr; /* address */
281 struct sockaddr *netmask; /* netmask for that address */
282 struct sockaddr *broadaddr; /* broadcast address for that address */
283 struct sockaddr *dstaddr; /* P2P destination address for that address */
286 typedef void (*pcap_handler)(u_char *, const struct pcap_pkthdr *,
290 * Error codes for the pcap API.
291 * These will all be negative, so you can check for the success or
292 * failure of a call that returns these codes by checking for a
295 #define PCAP_ERROR -1 /* generic error code */
296 #define PCAP_ERROR_BREAK -2 /* loop terminated by pcap_breakloop */
297 #define PCAP_ERROR_NOT_ACTIVATED -3 /* the capture needs to be activated */
298 #define PCAP_ERROR_ACTIVATED -4 /* the operation can't be performed on already activated captures */
299 #define PCAP_ERROR_NO_SUCH_DEVICE -5 /* no such device exists */
300 #define PCAP_ERROR_RFMON_NOTSUP -6 /* this device doesn't support rfmon (monitor) mode */
301 #define PCAP_ERROR_NOT_RFMON -7 /* operation supported only in monitor mode */
302 #define PCAP_ERROR_PERM_DENIED -8 /* no permission to open the device */
303 #define PCAP_ERROR_IFACE_NOT_UP -9 /* interface isn't up */
304 #define PCAP_ERROR_CANTSET_TSTAMP_TYPE -10 /* this device doesn't support setting the time stamp type */
305 #define PCAP_ERROR_PROMISC_PERM_DENIED -11 /* you don't have permission to capture in promiscuous mode */
306 #define PCAP_ERROR_TSTAMP_PRECISION_NOTSUP -12 /* the requested time stamp precision is not supported */
309 * Warning codes for the pcap API.
310 * These will all be positive and non-zero, so they won't look like
313 #define PCAP_WARNING 1 /* generic warning code */
314 #define PCAP_WARNING_PROMISC_NOTSUP 2 /* this device doesn't support promiscuous mode */
315 #define PCAP_WARNING_TSTAMP_TYPE_NOTSUP 3 /* the requested time stamp type is not supported */
318 * Value to pass to pcap_compile() as the netmask if you don't know what
321 #define PCAP_NETMASK_UNKNOWN 0xffffffff
324 * We're deprecating pcap_lookupdev() for various reasons (not
325 * thread-safe, can behave weirdly with WinPcap). Callers
326 * should use pcap_findalldevs() and use the first device.
328 PCAP_API char *pcap_lookupdev(char *)
329 PCAP_DEPRECATED(pcap_lookupdev, "use 'pcap_findalldevs' and use the first device");
331 PCAP_API int pcap_lookupnet(const char *, bpf_u_int32 *, bpf_u_int32 *, char *);
333 PCAP_API pcap_t *pcap_create(const char *, char *);
334 PCAP_API int pcap_set_snaplen(pcap_t *, int);
335 PCAP_API int pcap_set_promisc(pcap_t *, int);
336 PCAP_API int pcap_can_set_rfmon(pcap_t *);
337 PCAP_API int pcap_set_rfmon(pcap_t *, int);
338 PCAP_API int pcap_set_timeout(pcap_t *, int);
339 PCAP_API int pcap_set_tstamp_type(pcap_t *, int);
340 PCAP_API int pcap_set_immediate_mode(pcap_t *, int);
341 PCAP_API int pcap_set_buffer_size(pcap_t *, int);
342 PCAP_API int pcap_set_tstamp_precision(pcap_t *, int);
343 PCAP_API int pcap_get_tstamp_precision(pcap_t *);
344 PCAP_API int pcap_activate(pcap_t *);
346 PCAP_API int pcap_list_tstamp_types(pcap_t *, int **);
347 PCAP_API void pcap_free_tstamp_types(int *);
348 PCAP_API int pcap_tstamp_type_name_to_val(const char *);
349 PCAP_API const char *pcap_tstamp_type_val_to_name(int);
350 PCAP_API const char *pcap_tstamp_type_val_to_description(int);
353 PCAP_API int pcap_set_protocol_linux(pcap_t *, int);
358 * Not all systems and interfaces will necessarily support all of these.
360 * A system that supports PCAP_TSTAMP_HOST is offering time stamps
361 * provided by the host machine, rather than by the capture device,
362 * but not committing to any characteristics of the time stamp;
363 * it will not offer any of the PCAP_TSTAMP_HOST_ subtypes.
365 * PCAP_TSTAMP_HOST_LOWPREC is a time stamp, provided by the host machine,
366 * that's low-precision but relatively cheap to fetch; it's normally done
367 * using the system clock, so it's normally synchronized with times you'd
368 * fetch from system calls.
370 * PCAP_TSTAMP_HOST_HIPREC is a time stamp, provided by the host machine,
371 * that's high-precision; it might be more expensive to fetch. It might
372 * or might not be synchronized with the system clock, and might have
373 * problems with time stamps for packets received on different CPUs,
374 * depending on the platform.
376 * PCAP_TSTAMP_ADAPTER is a high-precision time stamp supplied by the
377 * capture device; it's synchronized with the system clock.
379 * PCAP_TSTAMP_ADAPTER_UNSYNCED is a high-precision time stamp supplied by
380 * the capture device; it's not synchronized with the system clock.
382 * Note that time stamps synchronized with the system clock can go
383 * backwards, as the system clock can go backwards. If a clock is
384 * not in sync with the system clock, that could be because the
385 * system clock isn't keeping accurate time, because the other
386 * clock isn't keeping accurate time, or both.
388 * Note that host-provided time stamps generally correspond to the
389 * time when the time-stamping code sees the packet; this could
390 * be some unknown amount of time after the first or last bit of
391 * the packet is received by the network adapter, due to batching
392 * of interrupts for packet arrival, queueing delays, etc..
394 #define PCAP_TSTAMP_HOST 0 /* host-provided, unknown characteristics */
395 #define PCAP_TSTAMP_HOST_LOWPREC 1 /* host-provided, low precision */
396 #define PCAP_TSTAMP_HOST_HIPREC 2 /* host-provided, high precision */
397 #define PCAP_TSTAMP_ADAPTER 3 /* device-provided, synced with the system clock */
398 #define PCAP_TSTAMP_ADAPTER_UNSYNCED 4 /* device-provided, not synced with the system clock */
401 * Time stamp resolution types.
402 * Not all systems and interfaces will necessarily support all of these
403 * resolutions when doing live captures; all of them can be requested
404 * when reading a savefile.
406 #define PCAP_TSTAMP_PRECISION_MICRO 0 /* use timestamps with microsecond precision, default */
407 #define PCAP_TSTAMP_PRECISION_NANO 1 /* use timestamps with nanosecond precision */
409 PCAP_API pcap_t *pcap_open_live(const char *, int, int, int, char *);
410 PCAP_API pcap_t *pcap_open_dead(int, int);
411 PCAP_API pcap_t *pcap_open_dead_with_tstamp_precision(int, int, u_int);
412 PCAP_API pcap_t *pcap_open_offline_with_tstamp_precision(const char *, u_int, char *);
413 PCAP_API pcap_t *pcap_open_offline(const char *, char *);
415 PCAP_API pcap_t *pcap_hopen_offline_with_tstamp_precision(intptr_t, u_int, char *);
416 PCAP_API pcap_t *pcap_hopen_offline(intptr_t, char *);
418 * If we're building libpcap, these are internal routines in savefile.c,
419 * so we must not define them as macros.
421 * If we're not building libpcap, given that the version of the C runtime
422 * with which libpcap was built might be different from the version
423 * of the C runtime with which an application using libpcap was built,
424 * and that a FILE structure may differ between the two versions of the
425 * C runtime, calls to _fileno() must use the version of _fileno() in
426 * the C runtime used to open the FILE *, not the version in the C
427 * runtime with which libpcap was built. (Maybe once the Universal CRT
428 * rules the world, this will cease to be a problem.)
430 #ifndef BUILDING_PCAP
431 #define pcap_fopen_offline_with_tstamp_precision(f,p,b) \
432 pcap_hopen_offline_with_tstamp_precision(_get_osfhandle(_fileno(f)), p, b)
433 #define pcap_fopen_offline(f,b) \
434 pcap_hopen_offline(_get_osfhandle(_fileno(f)), b)
437 PCAP_API pcap_t *pcap_fopen_offline_with_tstamp_precision(FILE *, u_int, char *);
438 PCAP_API pcap_t *pcap_fopen_offline(FILE *, char *);
441 PCAP_API void pcap_close(pcap_t *);
442 PCAP_API int pcap_loop(pcap_t *, int, pcap_handler, u_char *);
443 PCAP_API int pcap_dispatch(pcap_t *, int, pcap_handler, u_char *);
444 PCAP_API const u_char *pcap_next(pcap_t *, struct pcap_pkthdr *);
445 PCAP_API int pcap_next_ex(pcap_t *, struct pcap_pkthdr **, const u_char **);
446 PCAP_API void pcap_breakloop(pcap_t *);
447 PCAP_API int pcap_stats(pcap_t *, struct pcap_stat *);
448 PCAP_API int pcap_setfilter(pcap_t *, struct bpf_program *);
449 PCAP_API int pcap_setdirection(pcap_t *, pcap_direction_t);
450 PCAP_API int pcap_getnonblock(pcap_t *, char *);
451 PCAP_API int pcap_setnonblock(pcap_t *, int, char *);
452 PCAP_API int pcap_inject(pcap_t *, const void *, size_t);
453 PCAP_API int pcap_sendpacket(pcap_t *, const u_char *, int);
454 PCAP_API const char *pcap_statustostr(int);
455 PCAP_API const char *pcap_strerror(int);
456 PCAP_API char *pcap_geterr(pcap_t *);
457 PCAP_API void pcap_perror(pcap_t *, const char *);
458 PCAP_API int pcap_compile(pcap_t *, struct bpf_program *, const char *, int,
460 PCAP_API int pcap_compile_nopcap(int, int, struct bpf_program *,
461 const char *, int, bpf_u_int32);
462 PCAP_API void pcap_freecode(struct bpf_program *);
463 PCAP_API int pcap_offline_filter(const struct bpf_program *,
464 const struct pcap_pkthdr *, const u_char *);
465 PCAP_API int pcap_datalink(pcap_t *);
466 PCAP_API int pcap_datalink_ext(pcap_t *);
467 PCAP_API int pcap_list_datalinks(pcap_t *, int **);
468 PCAP_API int pcap_set_datalink(pcap_t *, int);
469 PCAP_API void pcap_free_datalinks(int *);
470 PCAP_API int pcap_datalink_name_to_val(const char *);
471 PCAP_API const char *pcap_datalink_val_to_name(int);
472 PCAP_API const char *pcap_datalink_val_to_description(int);
473 PCAP_API const char *pcap_datalink_val_to_description_or_dlt(int);
474 PCAP_API int pcap_snapshot(pcap_t *);
475 PCAP_API int pcap_is_swapped(pcap_t *);
476 PCAP_API int pcap_major_version(pcap_t *);
477 PCAP_API int pcap_minor_version(pcap_t *);
478 PCAP_API int pcap_bufsize(pcap_t *);
481 PCAP_API FILE *pcap_file(pcap_t *);
482 PCAP_API int pcap_fileno(pcap_t *);
485 PCAP_API int pcap_wsockinit(void);
488 PCAP_API pcap_dumper_t *pcap_dump_open(pcap_t *, const char *);
490 PCAP_API pcap_dumper_t *pcap_dump_hopen(pcap_t *, intptr_t);
492 * If we're building libpcap, this is an internal routine in sf-pcap.c, so
493 * we must not define it as a macro.
495 * If we're not building libpcap, given that the version of the C runtime
496 * with which libpcap was built might be different from the version
497 * of the C runtime with which an application using libpcap was built,
498 * and that a FILE structure may differ between the two versions of the
499 * C runtime, calls to _fileno() must use the version of _fileno() in
500 * the C runtime used to open the FILE *, not the version in the C
501 * runtime with which libpcap was built. (Maybe once the Universal CRT
502 * rules the world, this will cease to be a problem.)
504 #ifndef BUILDING_PCAP
505 #define pcap_dump_fopen(p,f) \
506 pcap_dump_hopen(p, _get_osfhandle(_fileno(f)))
509 PCAP_API pcap_dumper_t *pcap_dump_fopen(pcap_t *, FILE *fp);
511 PCAP_API pcap_dumper_t *pcap_dump_open_append(pcap_t *, const char *);
512 PCAP_API FILE *pcap_dump_file(pcap_dumper_t *);
513 PCAP_API long pcap_dump_ftell(pcap_dumper_t *);
514 PCAP_API int64_t pcap_dump_ftell64(pcap_dumper_t *);
515 PCAP_API int pcap_dump_flush(pcap_dumper_t *);
516 PCAP_API void pcap_dump_close(pcap_dumper_t *);
517 PCAP_API void pcap_dump(u_char *, const struct pcap_pkthdr *, const u_char *);
519 PCAP_API int pcap_findalldevs(pcap_if_t **, char *);
520 PCAP_API void pcap_freealldevs(pcap_if_t *);
523 * We return a pointer to the version string, rather than exporting the
524 * version string directly.
526 * On at least some UNIXes, if you import data from a shared library into
527 * an program, the data is bound into the program binary, so if the string
528 * in the version of the library with which the program was linked isn't
529 * the same as the string in the version of the library with which the
530 * program is being run, various undesirable things may happen (warnings,
531 * the string being the one from the version of the library with which the
532 * program was linked, or even weirder things, such as the string being the
533 * one from the library but being truncated).
535 * On Windows, the string is constructed at run time.
537 PCAP_API const char *pcap_lib_version(void);
540 * On at least some versions of NetBSD and QNX, we don't want to declare
541 * bpf_filter() here, as it's also be declared in <net/bpf.h>, with a
542 * different signature, but, on other BSD-flavored UN*Xes, it's not
543 * declared in <net/bpf.h>, so we *do* want to declare it here, so it's
544 * declared when we build pcap-bpf.c.
546 #if !defined(__NetBSD__) && !defined(__QNX__)
547 PCAP_API u_int bpf_filter(const struct bpf_insn *, const u_char *, u_int, u_int);
549 PCAP_API int bpf_validate(const struct bpf_insn *f, int len);
550 PCAP_API char *bpf_image(const struct bpf_insn *, int);
551 PCAP_API void bpf_dump(const struct bpf_program *, int);
560 \brief A queue of raw packets that will be sent to the network with pcap_sendqueue_transmit().
562 struct pcap_send_queue
564 u_int maxlen; /* Maximum size of the queue, in bytes. This
565 variable contains the size of the buffer field. */
566 u_int len; /* Current size of the queue, in bytes. */
567 char *buffer; /* Buffer containing the packets to be sent. */
570 typedef struct pcap_send_queue pcap_send_queue;
573 \brief This typedef is a support for the pcap_get_airpcap_handle() function
575 #if !defined(AIRPCAP_HANDLE__EAE405F5_0171_9592_B3C2_C19EC426AD34__DEFINED_)
576 #define AIRPCAP_HANDLE__EAE405F5_0171_9592_B3C2_C19EC426AD34__DEFINED_
577 typedef struct _AirpcapHandle *PAirpcapHandle;
580 PCAP_API int pcap_setbuff(pcap_t *p, int dim);
581 PCAP_API int pcap_setmode(pcap_t *p, int mode);
582 PCAP_API int pcap_setmintocopy(pcap_t *p, int size);
584 PCAP_API HANDLE pcap_getevent(pcap_t *p);
586 PCAP_API int pcap_oid_get_request(pcap_t *, bpf_u_int32, void *, size_t *);
587 PCAP_API int pcap_oid_set_request(pcap_t *, bpf_u_int32, const void *, size_t *);
589 PCAP_API pcap_send_queue* pcap_sendqueue_alloc(u_int memsize);
591 PCAP_API void pcap_sendqueue_destroy(pcap_send_queue* queue);
593 PCAP_API int pcap_sendqueue_queue(pcap_send_queue* queue, const struct pcap_pkthdr *pkt_header, const u_char *pkt_data);
595 PCAP_API u_int pcap_sendqueue_transmit(pcap_t *p, pcap_send_queue* queue, int sync);
597 PCAP_API struct pcap_stat *pcap_stats_ex(pcap_t *p, int *pcap_stat_size);
599 PCAP_API int pcap_setuserbuffer(pcap_t *p, int size);
601 PCAP_API int pcap_live_dump(pcap_t *p, char *filename, int maxsize, int maxpacks);
603 PCAP_API int pcap_live_dump_ended(pcap_t *p, int sync);
605 PCAP_API int pcap_start_oem(char* err_str, int flags);
607 PCAP_API PAirpcapHandle pcap_get_airpcap_handle(pcap_t *p);
619 PCAP_API int pcap_stats_ex (pcap_t *, struct pcap_stat_ex *);
620 PCAP_API void pcap_set_wait (pcap_t *p, void (*yield)(void), int wait);
621 PCAP_API u_long pcap_mac_packets (void);
629 PCAP_API int pcap_get_selectable_fd(pcap_t *);
630 PCAP_API struct timeval *pcap_get_required_select_timeout(pcap_t *);
632 #endif /* _WIN32/MSDOS/UN*X */
635 * Remote capture definitions.
637 * These routines are only present if libpcap has been configured to
638 * include remote capture support.
642 * The maximum buffer size in which address, port, interface names are kept.
644 * In case the adapter name or such is larger than this value, it is truncated.
645 * This is not used by the user; however it must be aware that an hostname / interface
646 * name longer than this value will be truncated.
648 #define PCAP_BUF_SIZE 1024
651 * The type of input source, passed to pcap_open().
653 #define PCAP_SRC_FILE 2 /* local savefile */
654 #define PCAP_SRC_IFLOCAL 3 /* local network interface */
655 #define PCAP_SRC_IFREMOTE 4 /* interface on a remote host, using RPCAP */
658 * The formats allowed by pcap_open() are the following:
659 * - file://path_and_filename [opens a local file]
660 * - rpcap://devicename [opens the selected device devices available on the local host, without using the RPCAP protocol]
661 * - rpcap://host/devicename [opens the selected device available on a remote host]
662 * - rpcap://host:port/devicename [opens the selected device available on a remote host, using a non-standard port for RPCAP]
663 * - adaptername [to open a local adapter; kept for compability, but it is strongly discouraged]
664 * - (NULL) [to open the first local adapter; kept for compability, but it is strongly discouraged]
666 * The formats allowed by the pcap_findalldevs_ex() are the following:
667 * - file://folder/ [lists all the files in the given folder]
668 * - rpcap:// [lists all local adapters]
669 * - rpcap://host:port/ [lists the devices available on a remote host]
671 * Referring to the 'host' and 'port' parameters, they can be either numeric or literal. Since
672 * IPv6 is fully supported, these are the allowed formats:
674 * - host (literal): e.g. host.foo.bar
675 * - host (numeric IPv4): e.g. 10.11.12.13
676 * - host (numeric IPv4, IPv6 style): e.g. [10.11.12.13]
677 * - host (numeric IPv6): e.g. [1:2:3::4]
678 * - port: can be either numeric (e.g. '80') or literal (e.g. 'http')
680 * Here you find some allowed examples:
681 * - rpcap://host.foo.bar/devicename [everything literal, no port number]
682 * - rpcap://host.foo.bar:1234/devicename [everything literal, with port number]
683 * - rpcap://10.11.12.13/devicename [IPv4 numeric, no port number]
684 * - rpcap://10.11.12.13:1234/devicename [IPv4 numeric, with port number]
685 * - rpcap://[10.11.12.13]:1234/devicename [IPv4 numeric with IPv6 format, with port number]
686 * - rpcap://[1:2:3::4]/devicename [IPv6 numeric, no port number]
687 * - rpcap://[1:2:3::4]:1234/devicename [IPv6 numeric, with port number]
688 * - rpcap://[1:2:3::4]:http/devicename [IPv6 numeric, with literal port number]
692 * URL schemes for capture source.
695 * This string indicates that the user wants to open a capture from a
698 #define PCAP_SRC_FILE_STRING "file://"
700 * This string indicates that the user wants to open a capture from a
701 * network interface. This string does not necessarily involve the use
702 * of the RPCAP protocol. If the interface required resides on the local
703 * host, the RPCAP protocol is not involved and the local functions are used.
705 #define PCAP_SRC_IF_STRING "rpcap://"
708 * Flags to pass to pcap_open().
712 * Specifies whether promiscuous mode is to be used.
714 #define PCAP_OPENFLAG_PROMISCUOUS 0x00000001
717 * Specifies, for an RPCAP capture, whether the data transfer (in
718 * case of a remote capture) has to be done with UDP protocol.
720 * If it is '1' if you want a UDP data connection, '0' if you want
721 * a TCP data connection; control connection is always TCP-based.
722 * A UDP connection is much lighter, but it does not guarantee that all
723 * the captured packets arrive to the client workstation. Moreover,
724 * it could be harmful in case of network congestion.
725 * This flag is meaningless if the source is not a remote interface.
726 * In that case, it is simply ignored.
728 #define PCAP_OPENFLAG_DATATX_UDP 0x00000002
731 * Specifies wheether the remote probe will capture its own generated
734 * In case the remote probe uses the same interface to capture traffic
735 * and to send data back to the caller, the captured traffic includes
736 * the RPCAP traffic as well. If this flag is turned on, the RPCAP
737 * traffic is excluded from the capture, so that the trace returned
738 * back to the collector is does not include this traffic.
740 * Has no effect on local interfaces or savefiles.
742 #define PCAP_OPENFLAG_NOCAPTURE_RPCAP 0x00000004
745 * Specifies whether the local adapter will capture its own generated traffic.
747 * This flag tells the underlying capture driver to drop the packets
748 * that were sent by itself. This is useful when building applications
749 * such as bridges that should ignore the traffic they just sent.
751 * Supported only on Windows.
753 #define PCAP_OPENFLAG_NOCAPTURE_LOCAL 0x00000008
756 * This flag configures the adapter for maximum responsiveness.
758 * In presence of a large value for nbytes, WinPcap waits for the arrival
759 * of several packets before copying the data to the user. This guarantees
760 * a low number of system calls, i.e. lower processor usage, i.e. better
761 * performance, which is good for applications like sniffers. If the user
762 * sets the PCAP_OPENFLAG_MAX_RESPONSIVENESS flag, the capture driver will
763 * copy the packets as soon as the application is ready to receive them.
764 * This is suggested for real time applications (such as, for example,
765 * a bridge) that need the best responsiveness.
767 * The equivalent with pcap_create()/pcap_activate() is "immediate mode".
769 #define PCAP_OPENFLAG_MAX_RESPONSIVENESS 0x00000010
772 * Remote authentication methods.
773 * These are used in the 'type' member of the pcap_rmtauth structure.
777 * NULL authentication.
779 * The 'NULL' authentication has to be equal to 'zero', so that old
780 * applications can just put every field of struct pcap_rmtauth to zero,
783 #define RPCAP_RMTAUTH_NULL 0
785 * Username/password authentication.
787 * With this type of authentication, the RPCAP protocol will use the username/
788 * password provided to authenticate the user on the remote machine. If the
789 * authentication is successful (and the user has the right to open network
790 * devices) the RPCAP connection will continue; otherwise it will be dropped.
792 * *******NOTE********: the username and password are sent over the network
793 * to the capture server *IN CLEAR TEXT*. Don't use this on a network
794 * that you don't completely control! (And be *really* careful in your
795 * definition of "completely"!)
797 #define RPCAP_RMTAUTH_PWD 1
800 * This structure keeps the information needed to autheticate the user
801 * on a remote machine.
803 * The remote machine can either grant or refuse the access according
804 * to the information provided.
805 * In case the NULL authentication is required, both 'username' and
806 * 'password' can be NULL pointers.
808 * This structure is meaningless if the source is not a remote interface;
809 * in that case, the functions which requires such a structure can accept
810 * a NULL pointer as well.
815 * \brief Type of the authentication required.
817 * In order to provide maximum flexibility, we can support different types
818 * of authentication based on the value of this 'type' variable. The currently
819 * supported authentication methods are defined into the
820 * \link remote_auth_methods Remote Authentication Methods Section\endlink.
824 * \brief Zero-terminated string containing the username that has to be
825 * used on the remote machine for authentication.
827 * This field is meaningless in case of the RPCAP_RMTAUTH_NULL authentication
828 * and it can be NULL.
832 * \brief Zero-terminated string containing the password that has to be
833 * used on the remote machine for authentication.
835 * This field is meaningless in case of the RPCAP_RMTAUTH_NULL authentication
836 * and it can be NULL.
842 * This routine can open a savefile, a local device, or a device on
843 * a remote machine running an RPCAP server.
845 * For opening a savefile, the pcap_open_offline routines can be used,
846 * and will work just as well; code using them will work on more
847 * platforms than code using pcap_open() to open savefiles.
849 * For opening a local device, pcap_open_live() can be used; it supports
850 * most of the capabilities that pcap_open() supports, and code using it
851 * will work on more platforms than code using pcap_open(). pcap_create()
852 * and pcap_activate() can also be used; they support all capabilities
853 * that pcap_open() supports, except for the Windows-only
854 * PCAP_OPENFLAG_NOCAPTURE_LOCAL, and support additional capabilities.
856 * For opening a remote capture, pcap_open() is currently the only
859 PCAP_API pcap_t *pcap_open(const char *source, int snaplen, int flags,
860 int read_timeout, struct pcap_rmtauth *auth, char *errbuf);
861 PCAP_API int pcap_createsrcstr(char *source, int type, const char *host,
862 const char *port, const char *name, char *errbuf);
863 PCAP_API int pcap_parsesrcstr(const char *source, int *type, char *host,
864 char *port, char *name, char *errbuf);
867 * This routine can scan a directory for savefiles, list local capture
868 * devices, or list capture devices on a remote machine running an RPCAP
871 * For scanning for savefiles, it can be used on both UN*X systems and
872 * Windows systems; for each directory entry it sees, it tries to open
873 * the file as a savefile using pcap_open_offline(), and only includes
874 * it in the list of files if the open succeeds, so it filters out
875 * files for which the user doesn't have read permission, as well as
876 * files that aren't valid savefiles readable by libpcap.
878 * For listing local capture devices, it's just a wrapper around
879 * pcap_findalldevs(); code using pcap_findalldevs() will work on more
880 * platforms than code using pcap_findalldevs_ex().
882 * For listing remote capture devices, pcap_findalldevs_ex() is currently
883 * the only API available.
885 PCAP_API int pcap_findalldevs_ex(const char *source,
886 struct pcap_rmtauth *auth, pcap_if_t **alldevs, char *errbuf);
891 * These allow pcap_loop(), pcap_dispatch(), pcap_next(), and pcap_next_ex()
892 * to see only a sample of packets, rather than all packets.
894 * Currently, they work only on Windows local captures.
898 * Specifies that no sampling is to be done on the current capture.
900 * In this case, no sampling algorithms are applied to the current capture.
902 #define PCAP_SAMP_NOSAMP 0
905 * Specifies that only 1 out of N packets must be returned to the user.
907 * In this case, the 'value' field of the 'pcap_samp' structure indicates the
908 * number of packets (minus 1) that must be discarded before one packet got
910 * In other words, if 'value = 10', the first packet is returned to the
911 * caller, while the following 9 are discarded.
913 #define PCAP_SAMP_1_EVERY_N 1
916 * Specifies that we have to return 1 packet every N milliseconds.
918 * In this case, the 'value' field of the 'pcap_samp' structure indicates
919 * the 'waiting time' in milliseconds before one packet got accepted.
920 * In other words, if 'value = 10', the first packet is returned to the
921 * caller; the next returned one will be the first packet that arrives
922 * when 10ms have elapsed.
924 #define PCAP_SAMP_FIRST_AFTER_N_MS 2
927 * This structure defines the information related to sampling.
929 * In case the sampling is requested, the capturing device should read
930 * only a subset of the packets coming from the source. The returned packets
931 * depend on the sampling parameters.
933 * WARNING: The sampling process is applied *after* the filtering process.
934 * In other words, packets are filtered first, then the sampling process
935 * selects a subset of the 'filtered' packets and it returns them to the
941 * Method used for sampling; see above.
946 * This value depends on the sampling method defined.
947 * For its meaning, see above.
955 PCAP_API struct pcap_samp *pcap_setsampling(pcap_t *p);
961 /* Maximum length of an host name (needed for the RPCAP active mode) */
962 #define RPCAP_HOSTLIST_SIZE 1024
964 PCAP_API SOCKET pcap_remoteact_accept(const char *address, const char *port,
965 const char *hostlist, char *connectinghost,
966 struct pcap_rmtauth *auth, char *errbuf);
967 PCAP_API int pcap_remoteact_list(char *hostlist, char sep, int size,
969 PCAP_API int pcap_remoteact_close(const char *host, char *errbuf);
970 PCAP_API void pcap_remoteact_cleanup(void);
976 #endif /* lib_pcap_pcap_h */