2 * Copyright (c) 1993, 1994, 1995, 1996, 1997, 1998
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the Computer Systems
16 * Engineering Group at Lawrence Berkeley Laboratory.
17 * 4. Neither the name of the University nor of the Laboratory may be used
18 * to endorse or promote products derived from this software without
19 * specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 #include <pcap-types.h>
40 #include <sys/param.h>
44 #include <sys/ioctl.h>
45 #include <sys/socket.h>
46 #ifdef HAVE_SYS_SOCKIO_H
47 #include <sys/sockio.h>
50 struct mbuf; /* Squelch compiler warnings on some platforms for */
51 struct rtentry; /* declarations in <net/if.h> */
53 #include <netinet/in.h>
59 #if !defined(_MSC_VER) && !defined(__BORLANDC__) && !defined(__MINGW32__)
66 #include "diag-control.h"
68 #ifdef HAVE_OS_PROTO_H
82 #endif /* HAVE_DAG_API */
84 #ifdef HAVE_SEPTEL_API
85 #include "pcap-septel.h"
86 #endif /* HAVE_SEPTEL_API */
90 #endif /* HAVE_SNF_API */
94 #endif /* HAVE_TC_API */
96 #ifdef PCAP_SUPPORT_LINUX_USBMON
97 #include "pcap-usb-linux.h"
100 #ifdef PCAP_SUPPORT_BT
101 #include "pcap-bt-linux.h"
104 #ifdef PCAP_SUPPORT_BT_MONITOR
105 #include "pcap-bt-monitor-linux.h"
108 #ifdef PCAP_SUPPORT_NETFILTER
109 #include "pcap-netfilter-linux.h"
112 #ifdef PCAP_SUPPORT_NETMAP
113 #include "pcap-netmap.h"
116 #ifdef PCAP_SUPPORT_DBUS
117 #include "pcap-dbus.h"
120 #ifdef PCAP_SUPPORT_RDMASNIFF
121 #include "pcap-rdmasniff.h"
124 #ifdef PCAP_SUPPORT_DPDK
125 #include "pcap-dpdk.h"
128 #ifdef HAVE_AIRPCAP_API
129 #include "pcap-airpcap.h"
134 * To quote the WSAStartup() documentation:
136 * The WSAStartup function typically leads to protocol-specific helper
137 * DLLs being loaded. As a result, the WSAStartup function should not
138 * be called from the DllMain function in a application DLL. This can
139 * potentially cause deadlocks.
141 * and the WSACleanup() documentation:
143 * The WSACleanup function typically leads to protocol-specific helper
144 * DLLs being unloaded. As a result, the WSACleanup function should not
145 * be called from the DllMain function in a application DLL. This can
146 * potentially cause deadlocks.
148 * So we don't initialize Winsock in a DllMain() routine.
150 * pcap_init() should be called to initialize pcap on both UN*X and
151 * Windows; it will initialize Winsock on Windows. (It will also be
152 * initialized as needed if pcap_init() hasn't been called.)
160 internal_wsockinit(char *errbuf)
162 WORD wVersionRequested;
172 * Versions of Windows that don't support Winsock 2.2 are
175 wVersionRequested = MAKEWORD(2, 2);
176 status = WSAStartup(wVersionRequested, &wsaData);
179 if (errbuf != NULL) {
180 pcap_fmt_errmsg_for_win32_err(errbuf, PCAP_ERRBUF_SIZE,
181 status, "WSAStartup() failed");
185 atexit ((void(*)(void))WSACleanup);
191 * Exported in case some applications using WinPcap/Npcap called it,
192 * even though it wasn't exported.
197 return (internal_wsockinit(NULL));
201 * This is the exported function; new programs should call this.
202 * *Newer* programs should call pcap_init().
207 return (internal_wsockinit(NULL));
212 * Do whatever initialization is needed for libpcap.
214 * The argument specifies whether we use the local code page or UTF-8
215 * for strings; on UN*X, we just assume UTF-8 in places where the encoding
216 * would matter, whereas, on Windows, we use the local code page for
217 * PCAP_CHAR_ENC_LOCAL and UTF-8 for PCAP_CHAR_ENC_UTF_8.
219 * On Windows, we also disable the hack in pcap_create() to deal with
220 * being handed UTF-16 strings, because if the user calls this they're
221 * explicitly declaring that they will either be passing local code
222 * page strings or UTF-8 strings, so we don't need to allow UTF-16LE
223 * strings to be passed. For good measure, on Windows *and* UN*X,
224 * we disable pcap_lookupdev(), to prevent anybody from even
225 * *trying* to pass the result of pcap_lookupdev() - which might be
226 * UTF-16LE on Windows, for ugly compatibility reasons - to pcap_create()
227 * or pcap_open_live() or pcap_open().
229 * Returns 0 on success, -1 on error.
231 int pcap_new_api; /* pcap_lookupdev() always fails */
232 int pcap_utf_8_mode; /* Strings should be in UTF-8. */
235 pcap_init(unsigned int opts, char *errbuf)
237 static int initialized;
240 * Don't allow multiple calls that set different modes; that
241 * may mean a library is initializing pcap in one mode and
242 * a program using that library, or another library used by
243 * that program, is initializing it in another mode.
247 case PCAP_CHAR_ENC_LOCAL:
248 /* Leave "UTF-8 mode" off. */
250 if (pcap_utf_8_mode) {
251 snprintf(errbuf, PCAP_ERRBUF_SIZE,
252 "Multiple pcap_init calls with different character encodings");
258 case PCAP_CHAR_ENC_UTF_8:
259 /* Turn on "UTF-8 mode". */
261 if (!pcap_utf_8_mode) {
262 snprintf(errbuf, PCAP_ERRBUF_SIZE,
263 "Multiple pcap_init calls with different character encodings");
271 snprintf(errbuf, PCAP_ERRBUF_SIZE, "Unknown options specified");
276 * Turn the appropriate mode on for error messages; those routines
277 * are also used in rpcapd, which has no access to pcap's internal
278 * UTF-8 mode flag, so we have to call a routine to set its
281 pcap_fmt_set_encoding(opts);
285 * Nothing more to do; for example, on Windows, we've
286 * already initialized Winsock.
293 * Now set up Winsock.
295 if (internal_wsockinit(errbuf) == -1) {
310 * String containing the library version.
311 * Not explicitly exported via a header file - the right API to use
312 * is pcap_lib_version() - but some programs included it, so we
315 * We declare it here, right before defining it, to squelch any
316 * warnings we might get from compilers about the lack of a
319 PCAP_API char pcap_version[];
320 PCAP_API_DEF char pcap_version[] = PACKAGE_VERSION;
323 pcap_set_not_initialized_message(pcap_t *pcap)
325 if (pcap->activated) {
326 /* A module probably forgot to set the function pointer */
327 (void)snprintf(pcap->errbuf, sizeof(pcap->errbuf),
328 "This operation isn't properly handled by that device");
331 /* in case the caller doesn't check for PCAP_ERROR_NOT_ACTIVATED */
332 (void)snprintf(pcap->errbuf, sizeof(pcap->errbuf),
333 "This handle hasn't been activated yet");
337 pcap_read_not_initialized(pcap_t *pcap, int cnt _U_, pcap_handler callback _U_,
340 pcap_set_not_initialized_message(pcap);
341 /* this means 'not initialized' */
342 return (PCAP_ERROR_NOT_ACTIVATED);
346 pcap_inject_not_initialized(pcap_t *pcap, const void * buf _U_, int size _U_)
348 pcap_set_not_initialized_message(pcap);
349 /* this means 'not initialized' */
350 return (PCAP_ERROR_NOT_ACTIVATED);
354 pcap_setfilter_not_initialized(pcap_t *pcap, struct bpf_program *fp _U_)
356 pcap_set_not_initialized_message(pcap);
357 /* this means 'not initialized' */
358 return (PCAP_ERROR_NOT_ACTIVATED);
362 pcap_setdirection_not_initialized(pcap_t *pcap, pcap_direction_t d _U_)
364 pcap_set_not_initialized_message(pcap);
365 /* this means 'not initialized' */
366 return (PCAP_ERROR_NOT_ACTIVATED);
370 pcap_set_datalink_not_initialized(pcap_t *pcap, int dlt _U_)
372 pcap_set_not_initialized_message(pcap);
373 /* this means 'not initialized' */
374 return (PCAP_ERROR_NOT_ACTIVATED);
378 pcap_getnonblock_not_initialized(pcap_t *pcap)
380 pcap_set_not_initialized_message(pcap);
381 /* this means 'not initialized' */
382 return (PCAP_ERROR_NOT_ACTIVATED);
386 pcap_stats_not_initialized(pcap_t *pcap, struct pcap_stat *ps _U_)
388 pcap_set_not_initialized_message(pcap);
389 /* this means 'not initialized' */
390 return (PCAP_ERROR_NOT_ACTIVATED);
394 static struct pcap_stat *
395 pcap_stats_ex_not_initialized(pcap_t *pcap, int *pcap_stat_size _U_)
397 pcap_set_not_initialized_message(pcap);
402 pcap_setbuff_not_initialized(pcap_t *pcap, int dim _U_)
404 pcap_set_not_initialized_message(pcap);
405 /* this means 'not initialized' */
406 return (PCAP_ERROR_NOT_ACTIVATED);
410 pcap_setmode_not_initialized(pcap_t *pcap, int mode _U_)
412 pcap_set_not_initialized_message(pcap);
413 /* this means 'not initialized' */
414 return (PCAP_ERROR_NOT_ACTIVATED);
418 pcap_setmintocopy_not_initialized(pcap_t *pcap, int size _U_)
420 pcap_set_not_initialized_message(pcap);
421 /* this means 'not initialized' */
422 return (PCAP_ERROR_NOT_ACTIVATED);
426 pcap_getevent_not_initialized(pcap_t *pcap)
428 pcap_set_not_initialized_message(pcap);
429 return (INVALID_HANDLE_VALUE);
433 pcap_oid_get_request_not_initialized(pcap_t *pcap, bpf_u_int32 oid _U_,
434 void *data _U_, size_t *lenp _U_)
436 pcap_set_not_initialized_message(pcap);
437 return (PCAP_ERROR_NOT_ACTIVATED);
441 pcap_oid_set_request_not_initialized(pcap_t *pcap, bpf_u_int32 oid _U_,
442 const void *data _U_, size_t *lenp _U_)
444 pcap_set_not_initialized_message(pcap);
445 return (PCAP_ERROR_NOT_ACTIVATED);
449 pcap_sendqueue_transmit_not_initialized(pcap_t *pcap, pcap_send_queue* queue _U_,
452 pcap_set_not_initialized_message(pcap);
457 pcap_setuserbuffer_not_initialized(pcap_t *pcap, int size _U_)
459 pcap_set_not_initialized_message(pcap);
460 return (PCAP_ERROR_NOT_ACTIVATED);
464 pcap_live_dump_not_initialized(pcap_t *pcap, char *filename _U_, int maxsize _U_,
467 pcap_set_not_initialized_message(pcap);
468 return (PCAP_ERROR_NOT_ACTIVATED);
472 pcap_live_dump_ended_not_initialized(pcap_t *pcap, int sync _U_)
474 pcap_set_not_initialized_message(pcap);
475 return (PCAP_ERROR_NOT_ACTIVATED);
478 static PAirpcapHandle
479 pcap_get_airpcap_handle_not_initialized(pcap_t *pcap)
481 pcap_set_not_initialized_message(pcap);
487 * Returns 1 if rfmon mode can be set on the pcap_t, 0 if it can't,
488 * a PCAP_ERROR value on an error.
491 pcap_can_set_rfmon(pcap_t *p)
493 return (p->can_set_rfmon_op(p));
497 * For systems where rfmon mode is never supported.
500 pcap_cant_set_rfmon(pcap_t *p _U_)
506 * Sets *tstamp_typesp to point to an array 1 or more supported time stamp
507 * types; the return value is the number of supported time stamp types.
508 * The list should be freed by a call to pcap_free_tstamp_types() when
509 * you're done with it.
511 * A return value of 0 means "you don't get a choice of time stamp type",
512 * in which case *tstamp_typesp is set to null.
514 * PCAP_ERROR is returned on error.
517 pcap_list_tstamp_types(pcap_t *p, int **tstamp_typesp)
519 if (p->tstamp_type_count == 0) {
521 * We don't support multiple time stamp types.
522 * That means the only type we support is PCAP_TSTAMP_HOST;
523 * set up a list containing only that type.
525 *tstamp_typesp = (int*)malloc(sizeof(**tstamp_typesp));
526 if (*tstamp_typesp == NULL) {
527 pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf),
531 **tstamp_typesp = PCAP_TSTAMP_HOST;
534 *tstamp_typesp = (int*)calloc(sizeof(**tstamp_typesp),
535 p->tstamp_type_count);
536 if (*tstamp_typesp == NULL) {
537 pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf),
541 (void)memcpy(*tstamp_typesp, p->tstamp_type_list,
542 sizeof(**tstamp_typesp) * p->tstamp_type_count);
543 return (p->tstamp_type_count);
548 * In Windows, you might have a library built with one version of the
549 * C runtime library and an application built with another version of
550 * the C runtime library, which means that the library might use one
551 * version of malloc() and free() and the application might use another
552 * version of malloc() and free(). If so, that means something
553 * allocated by the library cannot be freed by the application, so we
554 * need to have a pcap_free_tstamp_types() routine to free up the list
555 * allocated by pcap_list_tstamp_types(), even though it's just a wrapper
559 pcap_free_tstamp_types(int *tstamp_type_list)
561 free(tstamp_type_list);
565 * Default one-shot callback; overridden for capture types where the
566 * packet data cannot be guaranteed to be available after the callback
567 * returns, so that a copy must be made.
570 pcap_oneshot(u_char *user, const struct pcap_pkthdr *h, const u_char *pkt)
572 struct oneshot_userdata *sp = (struct oneshot_userdata *)user;
579 pcap_next(pcap_t *p, struct pcap_pkthdr *h)
581 struct oneshot_userdata s;
587 if (pcap_dispatch(p, 1, p->oneshot_callback, (u_char *)&s) <= 0)
593 pcap_next_ex(pcap_t *p, struct pcap_pkthdr **pkt_header,
594 const u_char **pkt_data)
596 struct oneshot_userdata s;
598 s.hdr = &p->pcap_header;
602 /* Saves a pointer to the packet headers */
603 *pkt_header= &p->pcap_header;
605 if (p->rfile != NULL) {
608 /* We are on an offline capture */
609 status = pcap_offline_read(p, 1, p->oneshot_callback,
613 * Return codes for pcap_offline_read() are:
616 * - >0: OK - result is number of packets read, so
617 * it will be 1 in this case, as we've passed
618 * a maximum packet count of 1
619 * The first one ('0') conflicts with the return code of
620 * 0 from pcap_read() meaning "no packets arrived before
621 * the timeout expired", so we map it to -2 so you can
622 * distinguish between an EOF from a savefile and a
623 * "no packets arrived before the timeout expired, try
624 * again" from a live capture.
633 * Return codes for pcap_read() are:
636 * - -2: loop was broken out of with pcap_breakloop()
637 * - >0: OK, result is number of packets captured, so
638 * it will be 1 in this case, as we've passed
639 * a maximum packet count of 1
640 * The first one ('0') conflicts with the return code of 0 from
641 * pcap_offline_read() meaning "end of file".
643 return (p->read_op(p, 1, p->oneshot_callback, (u_char *)&s));
647 * Implementation of a pcap_if_list_t.
649 struct pcap_if_list {
650 pcap_if_t *beginning;
653 static struct capture_source_type {
654 int (*findalldevs_op)(pcap_if_list_t *, char *);
655 pcap_t *(*create_op)(const char *, char *, int *);
656 } capture_source_types[] = {
658 { dag_findalldevs, dag_create },
660 #ifdef HAVE_SEPTEL_API
661 { septel_findalldevs, septel_create },
664 { snf_findalldevs, snf_create },
667 { TcFindAllDevs, TcCreate },
669 #ifdef PCAP_SUPPORT_BT
670 { bt_findalldevs, bt_create },
672 #ifdef PCAP_SUPPORT_BT_MONITOR
673 { bt_monitor_findalldevs, bt_monitor_create },
675 #ifdef PCAP_SUPPORT_LINUX_USBMON
676 { usb_findalldevs, usb_create },
678 #ifdef PCAP_SUPPORT_NETFILTER
679 { netfilter_findalldevs, netfilter_create },
681 #ifdef PCAP_SUPPORT_NETMAP
682 { pcap_netmap_findalldevs, pcap_netmap_create },
684 #ifdef PCAP_SUPPORT_DBUS
685 { dbus_findalldevs, dbus_create },
687 #ifdef PCAP_SUPPORT_RDMASNIFF
688 { rdmasniff_findalldevs, rdmasniff_create },
690 #ifdef PCAP_SUPPORT_DPDK
691 { pcap_dpdk_findalldevs, pcap_dpdk_create },
693 #ifdef HAVE_AIRPCAP_API
694 { airpcap_findalldevs, airpcap_create },
700 * Get a list of all capture sources that are up and that we can open.
701 * Returns -1 on error, 0 otherwise.
702 * The list, as returned through "alldevsp", may be null if no interfaces
703 * were up and could be opened.
706 pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf)
709 pcap_if_list_t devlist;
712 * Find all the local network interfaces on which we
715 devlist.beginning = NULL;
716 if (pcap_platform_finddevs(&devlist, errbuf) == -1) {
718 * Failed - free all of the entries we were given
721 if (devlist.beginning != NULL)
722 pcap_freealldevs(devlist.beginning);
728 * Ask each of the non-local-network-interface capture
729 * source types what interfaces they have.
731 for (i = 0; capture_source_types[i].findalldevs_op != NULL; i++) {
732 if (capture_source_types[i].findalldevs_op(&devlist, errbuf) == -1) {
734 * We had an error; free the list we've been
737 if (devlist.beginning != NULL)
738 pcap_freealldevs(devlist.beginning);
745 * Return the first entry of the list of all devices.
747 *alldevsp = devlist.beginning;
751 static struct sockaddr *
752 dup_sockaddr(struct sockaddr *sa, size_t sa_length)
754 struct sockaddr *newsa;
756 if ((newsa = malloc(sa_length)) == NULL)
758 return (memcpy(newsa, sa, sa_length));
762 * Construct a "figure of merit" for an interface, for use when sorting
763 * the list of interfaces, in which interfaces that are up are superior
764 * to interfaces that aren't up, interfaces that are up and running are
765 * superior to interfaces that are up but not running, and non-loopback
766 * interfaces that are up and running are superior to loopback interfaces,
767 * and interfaces with the same flags have a figure of merit that's higher
768 * the lower the instance number.
770 * The goal is to try to put the interfaces most likely to be useful for
771 * capture at the beginning of the list.
773 * The figure of merit, which is lower the "better" the interface is,
774 * has the uppermost bit set if the interface isn't running, the bit
775 * below that set if the interface isn't up, the bit below that
776 * set if the interface is a loopback interface, and the bit below
777 * that set if it's the "any" interface.
779 * Note: we don't sort by unit number because 1) not all interfaces have
780 * a unit number (systemd, for example, might assign interface names
781 * based on the interface's MAC address or on the physical location of
782 * the adapter's connector), and 2) if the name does end with a simple
783 * unit number, it's not a global property of the interface, it's only
784 * useful as a sort key for device names with the same prefix, so xyz0
785 * shouldn't necessarily sort before abc2. This means that interfaces
786 * with the same figure of merit will be sorted by the order in which
787 * the mechanism from which we're getting the interfaces supplies them.
790 get_figure_of_merit(pcap_if_t *dev)
795 if (!(dev->flags & PCAP_IF_RUNNING))
797 if (!(dev->flags & PCAP_IF_UP))
801 * Give non-wireless interfaces that aren't disconnected a better
802 * figure of merit than interfaces that are disconnected, as
803 * "disconnected" should indicate that the interface isn't
804 * plugged into a network and thus won't give you any traffic.
806 * For wireless interfaces, it means "associated with a network",
807 * which we presume not to necessarily prevent capture, as you
808 * might run the adapter in some flavor of monitor mode.
810 if (!(dev->flags & PCAP_IF_WIRELESS) &&
811 (dev->flags & PCAP_IF_CONNECTION_STATUS) == PCAP_IF_CONNECTION_STATUS_DISCONNECTED)
815 * Sort loopback devices after non-loopback devices, *except* for
816 * disconnected devices.
818 if (dev->flags & PCAP_IF_LOOPBACK)
822 * Sort the "any" device before loopback and disconnected devices,
823 * but after all other devices.
825 if (strcmp(dev->name, "any") == 0)
833 * Try to get a description for a given device.
834 * Returns a mallocated description if it could and NULL if it couldn't.
836 * XXX - on FreeBSDs that support it, should it get the sysctl named
837 * "dev.{adapter family name}.{adapter unit}.%desc" to get a description
838 * of the adapter? Note that "dev.an.0.%desc" is "Aironet PC4500/PC4800"
839 * with my Cisco 350 card, so the name isn't entirely descriptive. The
840 * "dev.an.0.%pnpinfo" has a better description, although one might argue
841 * that the problem is really a driver bug - if it can find out that it's
842 * a Cisco 340 or 350, rather than an old Aironet card, it should use
843 * that in the description.
845 * Do NetBSD, DragonflyBSD, or OpenBSD support this as well? FreeBSD
846 * and OpenBSD let you get a description, but it's not generated by the OS,
847 * it's set with another ioctl that ifconfig supports; we use that to get
848 * a description in FreeBSD and OpenBSD, but if there is no such
849 * description available, it still might be nice to get some description
850 * string based on the device type or something such as that.
852 * In macOS, the System Configuration framework can apparently return
853 * names in 10.4 and later.
855 * It also appears that freedesktop.org's HAL offers an "info.product"
856 * string, but the HAL specification says it "should not be used in any
857 * UI" and "subsystem/capability specific properties" should be used
858 * instead and, in any case, I think HAL is being deprecated in
859 * favor of other stuff such as DeviceKit. DeviceKit doesn't appear
860 * to have any obvious product information for devices, but maybe
861 * I haven't looked hard enough.
863 * Using the System Configuration framework, or HAL, or DeviceKit, or
864 * whatever, would require that libpcap applications be linked with
865 * the frameworks/libraries in question. That shouldn't be a problem
866 * for programs linking with the shared version of libpcap (unless
867 * you're running on AIX - which I think is the only UN*X that doesn't
868 * support linking a shared library with other libraries on which it
869 * depends, and having an executable linked only with the first shared
870 * library automatically pick up the other libraries when started -
871 * and using HAL or whatever). Programs linked with the static
872 * version of libpcap would have to use pcap-config with the --static
873 * flag in order to get the right linker flags in order to pick up
874 * the additional libraries/frameworks; those programs need that anyway
875 * for libpcap 1.1 and beyond on Linux, as, by default, it requires
878 * Do any other UN*Xes, or desktop environments support getting a
883 get_if_description(const char *name)
885 char *description = NULL;
887 struct ifreq ifrdesc;
889 size_t descrlen = 64;
891 size_t descrlen = IFDESCRSIZE;
892 #endif /* IFDESCRSIZE */
895 * Get the description for the interface.
897 memset(&ifrdesc, 0, sizeof ifrdesc);
898 pcap_strlcpy(ifrdesc.ifr_name, name, sizeof ifrdesc.ifr_name);
899 s = socket(AF_INET, SOCK_DGRAM, 0);
903 * On FreeBSD, if the buffer isn't big enough for the
904 * description, the ioctl succeeds, but the description
905 * isn't copied, ifr_buffer.length is set to the description
906 * length, and ifr_buffer.buffer is set to NULL.
910 if ((description = malloc(descrlen)) != NULL) {
911 ifrdesc.ifr_buffer.buffer = description;
912 ifrdesc.ifr_buffer.length = descrlen;
913 if (ioctl(s, SIOCGIFDESCR, &ifrdesc) == 0) {
914 if (ifrdesc.ifr_buffer.buffer ==
918 descrlen = ifrdesc.ifr_buffer.length;
921 * Failed to get interface description.
930 #else /* __FreeBSD__ */
932 * The only other OS that currently supports
933 * SIOCGIFDESCR is OpenBSD, and it has no way
934 * to get the description length - it's clamped
935 * to a maximum of IFDESCRSIZE.
937 if ((description = malloc(descrlen)) != NULL) {
938 ifrdesc.ifr_data = (caddr_t)description;
939 if (ioctl(s, SIOCGIFDESCR, &ifrdesc) != 0) {
941 * Failed to get interface description.
947 #endif /* __FreeBSD__ */
949 if (description != NULL && description[0] == '\0') {
951 * Description is empty, so discard it.
960 * For FreeBSD, if we didn't get a description, and this is
961 * a device with a name of the form usbusN, label it as a USB
964 if (description == NULL) {
965 if (strncmp(name, "usbus", 5) == 0) {
967 * OK, it begins with "usbus".
973 busnum = strtol(name + 5, &p, 10);
974 if (errno == 0 && p != name + 5 && *p == '\0' &&
975 busnum >= 0 && busnum <= INT_MAX) {
977 * OK, it's a valid number that's not
978 * bigger than INT_MAX. Construct
979 * a description from it.
980 * (If that fails, we don't worry about
981 * it, we just return NULL.)
983 if (pcap_asprintf(&description,
984 "USB bus number %ld", busnum) == -1) {
992 return (description);
993 #else /* SIOCGIFDESCR */
994 get_if_description(const char *name _U_)
997 #endif /* SIOCGIFDESCR */
1001 * Look for a given device in the specified list of devices.
1003 * If we find it, return a pointer to its entry.
1005 * If we don't find it, attempt to add an entry for it, with the specified
1006 * IFF_ flags and description, and, if that succeeds, return a pointer to
1007 * the new entry, otherwise return NULL and set errbuf to an error message.
1010 find_or_add_if(pcap_if_list_t *devlistp, const char *name,
1011 bpf_u_int32 if_flags, get_if_flags_func get_flags_func, char *errbuf)
1013 bpf_u_int32 pcap_flags;
1016 * Convert IFF_ flags to pcap flags.
1020 if (if_flags & IFF_LOOPBACK)
1021 pcap_flags |= PCAP_IF_LOOPBACK;
1024 * We don't have IFF_LOOPBACK, so look at the device name to
1025 * see if it looks like a loopback device.
1027 if (name[0] == 'l' && name[1] == 'o' &&
1028 (PCAP_ISDIGIT(name[2]) || name[2] == '\0'))
1029 pcap_flags |= PCAP_IF_LOOPBACK;
1032 if (if_flags & IFF_UP)
1033 pcap_flags |= PCAP_IF_UP;
1036 if (if_flags & IFF_RUNNING)
1037 pcap_flags |= PCAP_IF_RUNNING;
1041 * Attempt to find an entry for this device; if we don't find one,
1042 * attempt to add one.
1044 return (find_or_add_dev(devlistp, name, pcap_flags,
1045 get_flags_func, get_if_description(name), errbuf));
1049 * Look for a given device in the specified list of devices.
1051 * If we find it, then, if the specified address isn't null, add it to
1052 * the list of addresses for the device and return 0.
1054 * If we don't find it, attempt to add an entry for it, with the specified
1055 * IFF_ flags and description, and, if that succeeds, add the specified
1056 * address to its list of addresses if that address is non-null, and
1057 * return 0, otherwise return -1 and set errbuf to an error message.
1059 * (We can get called with a null address because we might get a list
1060 * of interface name/address combinations from the underlying OS, with
1061 * the address being absent in some cases, rather than a list of
1062 * interfaces with each interface having a list of addresses, so this
1063 * call may be the only call made to add to the list, and we want to
1064 * add interfaces even if they have no addresses.)
1067 add_addr_to_if(pcap_if_list_t *devlistp, const char *name,
1068 bpf_u_int32 if_flags, get_if_flags_func get_flags_func,
1069 struct sockaddr *addr, size_t addr_size,
1070 struct sockaddr *netmask, size_t netmask_size,
1071 struct sockaddr *broadaddr, size_t broadaddr_size,
1072 struct sockaddr *dstaddr, size_t dstaddr_size,
1078 * Check whether the device exists and, if not, add it.
1080 curdev = find_or_add_if(devlistp, name, if_flags, get_flags_func,
1082 if (curdev == NULL) {
1091 * There's no address to add; this entry just meant
1092 * "here's a new interface".
1098 * "curdev" is an entry for this interface, and we have an
1099 * address for it; add an entry for that address to the
1100 * interface's list of addresses.
1102 return (add_addr_to_dev(curdev, addr, addr_size, netmask,
1103 netmask_size, broadaddr, broadaddr_size, dstaddr,
1104 dstaddr_size, errbuf));
1109 * Add an entry to the list of addresses for an interface.
1110 * "curdev" is the entry for that interface.
1113 add_addr_to_dev(pcap_if_t *curdev,
1114 struct sockaddr *addr, size_t addr_size,
1115 struct sockaddr *netmask, size_t netmask_size,
1116 struct sockaddr *broadaddr, size_t broadaddr_size,
1117 struct sockaddr *dstaddr, size_t dstaddr_size,
1120 pcap_addr_t *curaddr, *prevaddr, *nextaddr;
1123 * Allocate the new entry and fill it in.
1125 curaddr = (pcap_addr_t *)malloc(sizeof(pcap_addr_t));
1126 if (curaddr == NULL) {
1127 pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
1132 curaddr->next = NULL;
1133 if (addr != NULL && addr_size != 0) {
1134 curaddr->addr = (struct sockaddr *)dup_sockaddr(addr, addr_size);
1135 if (curaddr->addr == NULL) {
1136 pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
1142 curaddr->addr = NULL;
1144 if (netmask != NULL && netmask_size != 0) {
1145 curaddr->netmask = (struct sockaddr *)dup_sockaddr(netmask, netmask_size);
1146 if (curaddr->netmask == NULL) {
1147 pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
1149 if (curaddr->addr != NULL)
1150 free(curaddr->addr);
1155 curaddr->netmask = NULL;
1157 if (broadaddr != NULL && broadaddr_size != 0) {
1158 curaddr->broadaddr = (struct sockaddr *)dup_sockaddr(broadaddr, broadaddr_size);
1159 if (curaddr->broadaddr == NULL) {
1160 pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
1162 if (curaddr->netmask != NULL)
1163 free(curaddr->netmask);
1164 if (curaddr->addr != NULL)
1165 free(curaddr->addr);
1170 curaddr->broadaddr = NULL;
1172 if (dstaddr != NULL && dstaddr_size != 0) {
1173 curaddr->dstaddr = (struct sockaddr *)dup_sockaddr(dstaddr, dstaddr_size);
1174 if (curaddr->dstaddr == NULL) {
1175 pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
1177 if (curaddr->broadaddr != NULL)
1178 free(curaddr->broadaddr);
1179 if (curaddr->netmask != NULL)
1180 free(curaddr->netmask);
1181 if (curaddr->addr != NULL)
1182 free(curaddr->addr);
1187 curaddr->dstaddr = NULL;
1190 * Find the end of the list of addresses.
1192 for (prevaddr = curdev->addresses; prevaddr != NULL; prevaddr = nextaddr) {
1193 nextaddr = prevaddr->next;
1194 if (nextaddr == NULL) {
1196 * This is the end of the list.
1202 if (prevaddr == NULL) {
1204 * The list was empty; this is the first member.
1206 curdev->addresses = curaddr;
1209 * "prevaddr" is the last member of the list; append
1210 * this member to it.
1212 prevaddr->next = curaddr;
1219 * Look for a given device in the specified list of devices.
1221 * If we find it, return 0 and set *curdev_ret to point to it.
1223 * If we don't find it, attempt to add an entry for it, with the specified
1224 * flags and description, and, if that succeeds, return 0, otherwise
1225 * return -1 and set errbuf to an error message.
1228 find_or_add_dev(pcap_if_list_t *devlistp, const char *name, bpf_u_int32 flags,
1229 get_if_flags_func get_flags_func, const char *description, char *errbuf)
1234 * Is there already an entry in the list for this device?
1236 curdev = find_dev(devlistp, name);
1237 if (curdev != NULL) {
1245 * No, we didn't find it.
1249 * Try to get additional flags for the device.
1251 if ((*get_flags_func)(name, &flags, errbuf) == -1) {
1259 * Now, try to add it to the list of devices.
1261 return (add_dev(devlistp, name, flags, description, errbuf));
1265 * Look for a given device in the specified list of devices, and return
1266 * the entry for it if we find it or NULL if we don't.
1269 find_dev(pcap_if_list_t *devlistp, const char *name)
1274 * Is there an entry in the list for this device?
1276 for (curdev = devlistp->beginning; curdev != NULL;
1277 curdev = curdev->next) {
1278 if (strcmp(name, curdev->name) == 0) {
1280 * We found it, so, yes, there is. No need to
1281 * add it. Provide the entry we found to our
1295 * Attempt to add an entry for a device, with the specified flags
1296 * and description, and, if that succeeds, return 0 and return a pointer
1297 * to the new entry, otherwise return NULL and set errbuf to an error
1300 * If we weren't given a description, try to get one.
1303 add_dev(pcap_if_list_t *devlistp, const char *name, bpf_u_int32 flags,
1304 const char *description, char *errbuf)
1306 pcap_if_t *curdev, *prevdev, *nextdev;
1307 u_int this_figure_of_merit, nextdev_figure_of_merit;
1309 curdev = malloc(sizeof(pcap_if_t));
1310 if (curdev == NULL) {
1311 pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
1317 * Fill in the entry.
1319 curdev->next = NULL;
1320 curdev->name = strdup(name);
1321 if (curdev->name == NULL) {
1322 pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
1327 if (description == NULL) {
1329 * We weren't handed a description for the interface.
1331 curdev->description = NULL;
1334 * We were handed a description; make a copy.
1336 curdev->description = strdup(description);
1337 if (curdev->description == NULL) {
1338 pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
1345 curdev->addresses = NULL; /* list starts out as empty */
1346 curdev->flags = flags;
1349 * Add it to the list, in the appropriate location.
1350 * First, get the "figure of merit" for this interface.
1352 this_figure_of_merit = get_figure_of_merit(curdev);
1355 * Now look for the last interface with an figure of merit
1356 * less than or equal to the new interface's figure of merit.
1358 * We start with "prevdev" being NULL, meaning we're before
1359 * the first element in the list.
1364 * Get the interface after this one.
1366 if (prevdev == NULL) {
1368 * The next element is the first element.
1370 nextdev = devlistp->beginning;
1372 nextdev = prevdev->next;
1375 * Are we at the end of the list?
1377 if (nextdev == NULL) {
1379 * Yes - we have to put the new entry after "prevdev".
1385 * Is the new interface's figure of merit less
1386 * than the next interface's figure of merit,
1387 * meaning that the new interface is better
1388 * than the next interface?
1390 nextdev_figure_of_merit = get_figure_of_merit(nextdev);
1391 if (this_figure_of_merit < nextdev_figure_of_merit) {
1393 * Yes - we should put the new entry
1394 * before "nextdev", i.e. after "prevdev".
1403 * Insert before "nextdev".
1405 curdev->next = nextdev;
1408 * Insert after "prevdev" - unless "prevdev" is null,
1409 * in which case this is the first interface.
1411 if (prevdev == NULL) {
1413 * This is the first interface. Make it
1414 * the first element in the list of devices.
1416 devlistp->beginning = curdev;
1418 prevdev->next = curdev;
1423 * Free a list of interfaces.
1426 pcap_freealldevs(pcap_if_t *alldevs)
1428 pcap_if_t *curdev, *nextdev;
1429 pcap_addr_t *curaddr, *nextaddr;
1431 for (curdev = alldevs; curdev != NULL; curdev = nextdev) {
1432 nextdev = curdev->next;
1435 * Free all addresses.
1437 for (curaddr = curdev->addresses; curaddr != NULL; curaddr = nextaddr) {
1438 nextaddr = curaddr->next;
1440 free(curaddr->addr);
1441 if (curaddr->netmask)
1442 free(curaddr->netmask);
1443 if (curaddr->broadaddr)
1444 free(curaddr->broadaddr);
1445 if (curaddr->dstaddr)
1446 free(curaddr->dstaddr);
1451 * Free the name string.
1456 * Free the description string, if any.
1458 if (curdev->description != NULL)
1459 free(curdev->description);
1462 * Free the interface.
1469 * pcap-npf.c has its own pcap_lookupdev(), for compatibility reasons, as
1470 * it actually returns the names of all interfaces, with a NUL separator
1471 * between them; some callers may depend on that.
1473 * MS-DOS has its own pcap_lookupdev(), but that might be useful only
1474 * as an optimization.
1476 * In all other cases, we just use pcap_findalldevs() to get a list of
1477 * devices, and pick from that list.
1479 #if !defined(HAVE_PACKET32) && !defined(MSDOS)
1481 * Return the name of a network interface attached to the system, or NULL
1482 * if none can be found. The interface must be configured up; the
1483 * lowest unit number is preferred; loopback is ignored.
1486 pcap_lookupdev(char *errbuf)
1491 * Windows - use the same size as the old WinPcap 3.1 code.
1492 * XXX - this is probably bigger than it needs to be.
1494 #define IF_NAMESIZE 8192
1497 * UN*X - use the system's interface name size.
1498 * XXX - that might not be large enough for capture devices
1499 * that aren't regular network interfaces.
1501 /* for old BSD systems, including bsdi3 */
1503 #define IF_NAMESIZE IFNAMSIZ
1506 static char device[IF_NAMESIZE + 1];
1510 * We disable this in "new API" mode, because 1) in WinPcap/Npcap,
1511 * it may return UTF-16 strings, for backwards-compatibility
1512 * reasons, and we're also disabling the hack to make that work,
1513 * for not-going-past-the-end-of-a-string reasons, and 2) we
1514 * want its behavior to be consistent.
1516 * In addition, it's not thread-safe, so we've marked it as
1520 snprintf(errbuf, PCAP_ERRBUF_SIZE,
1521 "pcap_lookupdev() is deprecated and is not supported in programs calling pcap_init()");
1525 if (pcap_findalldevs(&alldevs, errbuf) == -1)
1528 if (alldevs == NULL || (alldevs->flags & PCAP_IF_LOOPBACK)) {
1530 * There are no devices on the list, or the first device
1531 * on the list is a loopback device, which means there
1532 * are no non-loopback devices on the list. This means
1533 * we can't return any device.
1535 * XXX - why not return a loopback device? If we can't
1536 * capture on it, it won't be on the list, and if it's
1537 * on the list, there aren't any non-loopback devices,
1538 * so why not just supply it as the default device?
1540 (void)pcap_strlcpy(errbuf, "no suitable device found",
1545 * Return the name of the first device on the list.
1547 (void)pcap_strlcpy(device, alldevs->name, sizeof(device));
1551 pcap_freealldevs(alldevs);
1554 #endif /* !defined(HAVE_PACKET32) && !defined(MSDOS) */
1556 #if !defined(_WIN32) && !defined(MSDOS)
1558 * We don't just fetch the entire list of devices, search for the
1559 * particular device, and use its first IPv4 address, as that's too
1560 * much work to get just one device's netmask.
1562 * If we had an API to get attributes for a given device, we could
1566 pcap_lookupnet(const char *device, bpf_u_int32 *netp, bpf_u_int32 *maskp,
1570 register struct sockaddr_in *sin4;
1574 * The pseudo-device "any" listens on all interfaces and therefore
1575 * has the network address and -mask "0.0.0.0" therefore catching
1576 * all traffic. Using NULL for the interface is the same as "any".
1578 if (!device || strcmp(device, "any") == 0
1580 || strstr(device, "dag") != NULL
1582 #ifdef HAVE_SEPTEL_API
1583 || strstr(device, "septel") != NULL
1585 #ifdef PCAP_SUPPORT_BT
1586 || strstr(device, "bluetooth") != NULL
1588 #ifdef PCAP_SUPPORT_LINUX_USBMON
1589 || strstr(device, "usbmon") != NULL
1592 || strstr(device, "snf") != NULL
1594 #ifdef PCAP_SUPPORT_NETMAP
1595 || strncmp(device, "netmap:", 7) == 0
1596 || strncmp(device, "vale", 4) == 0
1598 #ifdef PCAP_SUPPORT_DPDK
1599 || strncmp(device, "dpdk:", 5) == 0
1606 fd = socket(AF_INET, SOCK_DGRAM, 0);
1608 pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
1612 memset(&ifr, 0, sizeof(ifr));
1614 /* XXX Work around Linux kernel bug */
1615 ifr.ifr_addr.sa_family = AF_INET;
1617 (void)pcap_strlcpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
1618 if (ioctl(fd, SIOCGIFADDR, (char *)&ifr) < 0) {
1619 if (errno == EADDRNOTAVAIL) {
1620 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
1621 "%s: no IPv4 address assigned", device);
1623 pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
1624 errno, "SIOCGIFADDR: %s", device);
1629 sin4 = (struct sockaddr_in *)&ifr.ifr_addr;
1630 *netp = sin4->sin_addr.s_addr;
1631 memset(&ifr, 0, sizeof(ifr));
1633 /* XXX Work around Linux kernel bug */
1634 ifr.ifr_addr.sa_family = AF_INET;
1636 (void)pcap_strlcpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
1637 if (ioctl(fd, SIOCGIFNETMASK, (char *)&ifr) < 0) {
1638 pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
1639 errno, "SIOCGIFNETMASK: %s", device);
1644 *maskp = sin4->sin_addr.s_addr;
1646 if (IN_CLASSA(*netp))
1647 *maskp = IN_CLASSA_NET;
1648 else if (IN_CLASSB(*netp))
1649 *maskp = IN_CLASSB_NET;
1650 else if (IN_CLASSC(*netp))
1651 *maskp = IN_CLASSC_NET;
1653 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
1654 "inet class for 0x%x unknown", *netp);
1661 #endif /* !defined(_WIN32) && !defined(MSDOS) */
1663 #ifdef ENABLE_REMOTE
1664 #include "pcap-rpcap.h"
1667 * Extract a substring from a string.
1670 get_substring(const char *p, size_t len, char *ebuf)
1674 token = malloc(len + 1);
1675 if (token == NULL) {
1676 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
1680 memcpy(token, p, len);
1686 * Parse a capture source that might be a URL.
1688 * If the source is not a URL, *schemep, *userinfop, *hostp, and *portp
1689 * are set to NULL, *pathp is set to point to the source, and 0 is
1692 * If source is a URL, and the URL refers to a local device (a special
1693 * case of rpcap:), *schemep, *userinfop, *hostp, and *portp are set
1694 * to NULL, *pathp is set to point to the device name, and 0 is returned.
1696 * If source is a URL, and it's not a special case that refers to a local
1697 * device, and the parse succeeds:
1699 * *schemep is set to point to an allocated string containing the scheme;
1701 * if user information is present in the URL, *userinfop is set to point
1702 * to an allocated string containing the user information, otherwise
1705 * if host information is present in the URL, *hostp is set to point
1706 * to an allocated string containing the host information, otherwise
1709 * if a port number is present in the URL, *portp is set to point
1710 * to an allocated string containing the port number, otherwise
1713 * *pathp is set to point to an allocated string containing the
1716 * and 0 is returned.
1718 * If the parse fails, ebuf is set to an error string, and -1 is returned.
1721 pcap_parse_source(const char *source, char **schemep, char **userinfop,
1722 char **hostp, char **portp, char **pathp, char *ebuf)
1728 size_t authority_len;
1730 char *parsep, *atsignp, *bracketp;
1731 char *userinfo, *host, *port, *path;
1734 * Start out returning nothing.
1745 * URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
1747 * hier-part = "//" authority path-abempty
1752 * authority = [ userinfo "@" ] host [ ":" port ]
1754 * userinfo = *( unreserved / pct-encoded / sub-delims / ":" )
1756 * Step 1: look for the ":" at the end of the scheme.
1757 * A colon in the source is *NOT* sufficient to indicate that
1758 * this is a URL, as interface names on some platforms might
1759 * include colons (e.g., I think some Solaris interfaces
1762 colonp = strchr(source, ':');
1763 if (colonp == NULL) {
1765 * The source is the device to open.
1766 * Return a NULL pointer for the scheme, user information,
1767 * host, and port, and return the device as the path.
1769 *pathp = strdup(source);
1770 if (*pathp == NULL) {
1771 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
1779 * All schemes must have "//" after them, i.e. we only support
1780 * hier-part = "//" authority path-abempty, not
1781 * hier-part = path-absolute
1782 * hier-part = path-rootless
1783 * hier-part = path-empty
1785 * We need that in order to distinguish between a local device
1786 * name that happens to contain a colon and a URI.
1788 if (strncmp(colonp + 1, "//", 2) != 0) {
1790 * The source is the device to open.
1791 * Return a NULL pointer for the scheme, user information,
1792 * host, and port, and return the device as the path.
1794 *pathp = strdup(source);
1795 if (*pathp == NULL) {
1796 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
1804 * XXX - check whether the purported scheme could be a scheme?
1808 * OK, this looks like a URL.
1811 scheme_len = colonp - source;
1812 scheme = malloc(scheme_len + 1);
1813 if (scheme == NULL) {
1814 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
1818 memcpy(scheme, source, scheme_len);
1819 scheme[scheme_len] = '\0';
1822 * Treat file: specially - take everything after file:// as
1825 if (pcap_strcasecmp(scheme, "file") == 0) {
1826 *pathp = strdup(colonp + 3);
1827 if (*pathp == NULL) {
1828 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
1838 * The WinPcap documentation says you can specify a local
1839 * interface with "rpcap://{device}"; we special-case
1840 * that here. If the scheme is "rpcap", and there are
1841 * no slashes past the "//", we just return the device.
1845 if ((pcap_strcasecmp(scheme, "rpcap") == 0 ||
1846 pcap_strcasecmp(scheme, "rpcaps") == 0) &&
1847 strchr(colonp + 3, '/') == NULL) {
1851 * Return a NULL pointer for the scheme, user information,
1852 * host, and port, and return the device as the path.
1855 *pathp = strdup(colonp + 3);
1856 if (*pathp == NULL) {
1857 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
1865 * OK, now start parsing the authority.
1866 * Get token, terminated with / or terminated at the end of
1869 authority_len = strcspn(colonp + 3, "/");
1870 authority = get_substring(colonp + 3, authority_len, ebuf);
1871 if (authority == NULL) {
1878 endp = colonp + 3 + authority_len;
1881 * Now carve the authority field into its components.
1886 * Is there a userinfo field?
1888 atsignp = strchr(parsep, '@');
1889 if (atsignp != NULL) {
1893 size_t userinfo_len;
1895 userinfo_len = atsignp - parsep;
1896 userinfo = get_substring(parsep, userinfo_len, ebuf);
1897 if (userinfo == NULL) {
1905 parsep = atsignp + 1;
1914 * Is there a host field?
1916 if (*parsep == '\0') {
1918 * No; there's no host field or port field.
1929 * Is it an IP-literal?
1931 if (*parsep == '[') {
1934 * Treat verything up to the closing square
1935 * bracket as the IP-Literal; we don't worry
1936 * about whether it's a valid IPv6address or
1937 * IPvFuture (or an IPv4address, for that
1938 * matter, just in case we get handed a
1939 * URL with an IPv4 IP-Literal, of the sort
1940 * that pcap_createsrcstr() used to generate,
1941 * and that pcap_parsesrcstr(), in the original
1942 * WinPcap code, accepted).
1944 bracketp = strchr(parsep, ']');
1945 if (bracketp == NULL) {
1947 * There's no closing square bracket.
1949 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1950 "IP-literal in URL doesn't end with ]");
1956 if (*(bracketp + 1) != '\0' &&
1957 *(bracketp + 1) != ':') {
1959 * There's extra crud after the
1960 * closing square bracketn.
1962 snprintf(ebuf, PCAP_ERRBUF_SIZE,
1963 "Extra text after IP-literal in URL");
1969 host_len = (bracketp - 1) - parsep;
1970 host = get_substring(parsep + 1, host_len, ebuf);
1980 parsep = bracketp + 1;
1984 * Treat everything up to a : or the end of
1985 * the string as the host.
1987 host_len = strcspn(parsep, ":");
1988 host = get_substring(parsep, host_len, ebuf);
1998 parsep = parsep + host_len;
2002 * Is there a port field?
2004 if (*parsep == ':') {
2006 * Yes. It's the rest of the authority field.
2011 port_len = strlen(parsep);
2012 port = get_substring(parsep, port_len, ebuf);
2033 * Everything else is the path. Strip off the leading /.
2038 path = strdup(endp + 1);
2040 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
2049 *userinfop = userinfo;
2057 pcap_createsrcstr_ex(char *source, int type, const char *host, const char *port,
2058 const char *name, unsigned char uses_ssl, char *errbuf)
2063 pcap_strlcpy(source, PCAP_SRC_FILE_STRING, PCAP_BUF_SIZE);
2064 if (name != NULL && *name != '\0') {
2065 pcap_strlcat(source, name, PCAP_BUF_SIZE);
2068 snprintf(errbuf, PCAP_ERRBUF_SIZE,
2069 "The file name cannot be NULL.");
2073 case PCAP_SRC_IFREMOTE:
2074 pcap_strlcpy(source,
2075 (uses_ssl ? "rpcaps://" : PCAP_SRC_IF_STRING),
2077 if (host != NULL && *host != '\0') {
2078 if (strchr(host, ':') != NULL) {
2080 * The host name contains a colon, so it's
2081 * probably an IPv6 address, and needs to
2082 * be included in square brackets.
2084 pcap_strlcat(source, "[", PCAP_BUF_SIZE);
2085 pcap_strlcat(source, host, PCAP_BUF_SIZE);
2086 pcap_strlcat(source, "]", PCAP_BUF_SIZE);
2088 pcap_strlcat(source, host, PCAP_BUF_SIZE);
2090 if (port != NULL && *port != '\0') {
2091 pcap_strlcat(source, ":", PCAP_BUF_SIZE);
2092 pcap_strlcat(source, port, PCAP_BUF_SIZE);
2095 pcap_strlcat(source, "/", PCAP_BUF_SIZE);
2097 snprintf(errbuf, PCAP_ERRBUF_SIZE,
2098 "The host name cannot be NULL.");
2102 if (name != NULL && *name != '\0')
2103 pcap_strlcat(source, name, PCAP_BUF_SIZE);
2107 case PCAP_SRC_IFLOCAL:
2108 pcap_strlcpy(source, PCAP_SRC_IF_STRING, PCAP_BUF_SIZE);
2110 if (name != NULL && *name != '\0')
2111 pcap_strlcat(source, name, PCAP_BUF_SIZE);
2116 snprintf(errbuf, PCAP_ERRBUF_SIZE,
2117 "The interface type is not valid.");
2124 pcap_createsrcstr(char *source, int type, const char *host, const char *port,
2125 const char *name, char *errbuf)
2127 return (pcap_createsrcstr_ex(source, type, host, port, name, 0, errbuf));
2131 pcap_parsesrcstr_ex(const char *source, int *type, char *host, char *port,
2132 char *name, unsigned char *uses_ssl, char *errbuf)
2134 char *scheme, *tmpuserinfo, *tmphost, *tmpport, *tmppath;
2136 /* Initialization stuff */
2146 /* Parse the source string */
2147 if (pcap_parse_source(source, &scheme, &tmpuserinfo, &tmphost,
2148 &tmpport, &tmppath, errbuf) == -1) {
2155 if (scheme == NULL) {
2159 if (name && tmppath)
2160 pcap_strlcpy(name, tmppath, PCAP_BUF_SIZE);
2162 *type = PCAP_SRC_IFLOCAL;
2171 if (strcmp(scheme, "rpcaps") == 0) {
2173 if (uses_ssl) *uses_ssl = 1;
2174 } else if (strcmp(scheme, "rpcap") == 0) {
2182 * pcap_parse_source() has already handled the case of
2185 if (host && tmphost) {
2187 snprintf(host, PCAP_BUF_SIZE, "%s@%s",
2188 tmpuserinfo, tmphost);
2190 pcap_strlcpy(host, tmphost, PCAP_BUF_SIZE);
2192 if (port && tmpport)
2193 pcap_strlcpy(port, tmpport, PCAP_BUF_SIZE);
2194 if (name && tmppath)
2195 pcap_strlcpy(name, tmppath, PCAP_BUF_SIZE);
2197 *type = PCAP_SRC_IFREMOTE;
2206 if (strcmp(scheme, "file") == 0) {
2210 if (name && tmppath)
2211 pcap_strlcpy(name, tmppath, PCAP_BUF_SIZE);
2213 *type = PCAP_SRC_FILE;
2223 * Neither rpcap: nor file:; just treat the entire string
2224 * as a local device.
2227 pcap_strlcpy(name, source, PCAP_BUF_SIZE);
2229 *type = PCAP_SRC_IFLOCAL;
2239 pcap_parsesrcstr(const char *source, int *type, char *host, char *port,
2240 char *name, char *errbuf)
2242 return (pcap_parsesrcstr_ex(source, type, host, port, name, NULL, errbuf));
2247 pcap_create(const char *device, char *errbuf)
2255 * A null device name is equivalent to the "any" device -
2256 * which might not be supported on this platform, but
2257 * this means that you'll get a "not supported" error
2258 * rather than, say, a crash when we try to dereference
2262 device_str = strdup("any");
2266 * On Windows, for backwards compatibility reasons,
2267 * pcap_lookupdev() returns a pointer to a sequence of
2268 * pairs of UTF-16LE device names and local code page
2269 * description strings.
2271 * This means that if a program uses pcap_lookupdev()
2272 * to get a default device, and hands that to an API
2273 * that opens devices, we'll get handed a UTF-16LE
2274 * string, not a string in the local code page.
2276 * To work around that, we check whether the string
2277 * looks as if it might be a UTF-16LE string and, if
2278 * so, convert it back to the local code page's
2281 * We disable that check in "new API" mode, because:
2283 * 1) You *cannot* reliably detect whether a
2284 * string is UTF-16LE or not; "a" could either
2285 * be a one-character ASCII string or the first
2286 * character of a UTF-16LE string.
2288 * 2) Doing that test can run past the end of
2289 * the string, if it's a 1-character ASCII
2292 * This particular version of this heuristic dates
2293 * back to WinPcap 4.1.1; PacketOpenAdapter() does
2294 * uses the same heuristic, with the exact same
2297 * That's why we disable this in "new API" mode.
2298 * We keep it around in legacy mode for backwards
2301 if (!pcap_new_api && device[0] != '\0' && device[1] == '\0') {
2304 length = wcslen((wchar_t *)device);
2305 device_str = (char *)malloc(length + 1);
2306 if (device_str == NULL) {
2307 pcap_fmt_errmsg_for_errno(errbuf,
2308 PCAP_ERRBUF_SIZE, errno,
2313 snprintf(device_str, length + 1, "%ws",
2314 (const wchar_t *)device);
2317 device_str = strdup(device);
2319 if (device_str == NULL) {
2320 pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
2326 * Try each of the non-local-network-interface capture
2327 * source types until we find one that works for this
2328 * device or run out of types.
2330 for (i = 0; capture_source_types[i].create_op != NULL; i++) {
2332 p = capture_source_types[i].create_op(device_str, errbuf,
2336 * The device name refers to a device of the
2337 * type in question; either it succeeded,
2338 * in which case p refers to a pcap_t to
2339 * later activate for the device, or it
2340 * failed, in which case p is null and we
2341 * should return that to report the failure
2346 * We assume the caller filled in errbuf.
2351 p->opt.device = device_str;
2357 * OK, try it as a regular network interface.
2359 p = pcap_create_interface(device_str, errbuf);
2362 * We assume the caller filled in errbuf.
2367 p->opt.device = device_str;
2372 * Set nonblocking mode on an unactivated pcap_t; this sets a flag
2373 * checked by pcap_activate(), which sets the mode after calling
2374 * the activate routine.
2377 pcap_setnonblock_unactivated(pcap_t *p, int nonblock)
2379 p->opt.nonblock = nonblock;
2384 initialize_ops(pcap_t *p)
2387 * Set operation pointers for operations that only work on
2388 * an activated pcap_t to point to a routine that returns
2389 * a "this isn't activated" error.
2391 p->read_op = pcap_read_not_initialized;
2392 p->inject_op = pcap_inject_not_initialized;
2393 p->setfilter_op = pcap_setfilter_not_initialized;
2394 p->setdirection_op = pcap_setdirection_not_initialized;
2395 p->set_datalink_op = pcap_set_datalink_not_initialized;
2396 p->getnonblock_op = pcap_getnonblock_not_initialized;
2397 p->stats_op = pcap_stats_not_initialized;
2399 p->stats_ex_op = pcap_stats_ex_not_initialized;
2400 p->setbuff_op = pcap_setbuff_not_initialized;
2401 p->setmode_op = pcap_setmode_not_initialized;
2402 p->setmintocopy_op = pcap_setmintocopy_not_initialized;
2403 p->getevent_op = pcap_getevent_not_initialized;
2404 p->oid_get_request_op = pcap_oid_get_request_not_initialized;
2405 p->oid_set_request_op = pcap_oid_set_request_not_initialized;
2406 p->sendqueue_transmit_op = pcap_sendqueue_transmit_not_initialized;
2407 p->setuserbuffer_op = pcap_setuserbuffer_not_initialized;
2408 p->live_dump_op = pcap_live_dump_not_initialized;
2409 p->live_dump_ended_op = pcap_live_dump_ended_not_initialized;
2410 p->get_airpcap_handle_op = pcap_get_airpcap_handle_not_initialized;
2414 * Default cleanup operation - implementations can override
2415 * this, but should call pcap_cleanup_live_common() after
2416 * doing their own additional cleanup.
2418 p->cleanup_op = pcap_cleanup_live_common;
2421 * In most cases, the standard one-shot callback can
2422 * be used for pcap_next()/pcap_next_ex().
2424 p->oneshot_callback = pcap_oneshot;
2427 * Default breakloop operation - implementations can override
2428 * this, but should call pcap_breakloop_common() before doing
2431 p->breakloop_op = pcap_breakloop_common;
2435 pcap_alloc_pcap_t(char *ebuf, size_t total_size, size_t private_offset)
2441 * total_size is the size of a structure containing a pcap_t
2442 * followed by a private structure.
2444 chunk = calloc(total_size, 1);
2445 if (chunk == NULL) {
2446 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
2452 * Get a pointer to the pcap_t at the beginning.
2454 p = (pcap_t *)chunk;
2457 p->handle = INVALID_HANDLE_VALUE; /* not opened yet */
2459 p->fd = -1; /* not opened yet */
2461 p->selectable_fd = -1;
2462 p->required_select_timeout = NULL;
2467 * private_offset is the offset, in bytes, of the private
2468 * data from the beginning of the structure.
2470 * Set the pointer to the private data; that's private_offset
2471 * bytes past the pcap_t.
2473 p->priv = (void *)(chunk + private_offset);
2479 pcap_create_common(char *ebuf, size_t total_size, size_t private_offset)
2483 p = pcap_alloc_pcap_t(ebuf, total_size, private_offset);
2488 * Default to "can't set rfmon mode"; if it's supported by
2489 * a platform, the create routine that called us can set
2490 * the op to its routine to check whether a particular
2491 * device supports it.
2493 p->can_set_rfmon_op = pcap_cant_set_rfmon;
2496 * If pcap_setnonblock() is called on a not-yet-activated
2497 * pcap_t, default to setting a flag and turning
2498 * on non-blocking mode when activated.
2500 p->setnonblock_op = pcap_setnonblock_unactivated;
2504 /* put in some defaults*/
2505 p->snapshot = 0; /* max packet size unspecified */
2506 p->opt.timeout = 0; /* no timeout specified */
2507 p->opt.buffer_size = 0; /* use the platform's default */
2510 p->opt.immediate = 0;
2511 p->opt.tstamp_type = -1; /* default to not setting time stamp type */
2512 p->opt.tstamp_precision = PCAP_TSTAMP_PRECISION_MICRO;
2514 * Platform-dependent options.
2517 p->opt.protocol = 0;
2520 p->opt.nocapture_local = 0;
2524 * Start out with no BPF code generation flags set.
2526 p->bpf_codegen_flags = 0;
2532 pcap_check_activated(pcap_t *p)
2535 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "can't perform "
2536 " operation on activated capture");
2543 pcap_set_snaplen(pcap_t *p, int snaplen)
2545 if (pcap_check_activated(p))
2546 return (PCAP_ERROR_ACTIVATED);
2547 p->snapshot = snaplen;
2552 pcap_set_promisc(pcap_t *p, int promisc)
2554 if (pcap_check_activated(p))
2555 return (PCAP_ERROR_ACTIVATED);
2556 p->opt.promisc = promisc;
2561 pcap_set_rfmon(pcap_t *p, int rfmon)
2563 if (pcap_check_activated(p))
2564 return (PCAP_ERROR_ACTIVATED);
2565 p->opt.rfmon = rfmon;
2570 pcap_set_timeout(pcap_t *p, int timeout_ms)
2572 if (pcap_check_activated(p))
2573 return (PCAP_ERROR_ACTIVATED);
2574 p->opt.timeout = timeout_ms;
2579 pcap_set_tstamp_type(pcap_t *p, int tstamp_type)
2583 if (pcap_check_activated(p))
2584 return (PCAP_ERROR_ACTIVATED);
2587 * The argument should have been u_int, but that's too late
2588 * to change now - it's an API.
2590 if (tstamp_type < 0)
2591 return (PCAP_WARNING_TSTAMP_TYPE_NOTSUP);
2594 * If p->tstamp_type_count is 0, we only support PCAP_TSTAMP_HOST;
2595 * the default time stamp type is PCAP_TSTAMP_HOST.
2597 if (p->tstamp_type_count == 0) {
2598 if (tstamp_type == PCAP_TSTAMP_HOST) {
2599 p->opt.tstamp_type = tstamp_type;
2604 * Check whether we claim to support this type of time stamp.
2606 for (i = 0; i < p->tstamp_type_count; i++) {
2607 if (p->tstamp_type_list[i] == (u_int)tstamp_type) {
2611 p->opt.tstamp_type = tstamp_type;
2618 * We don't support this type of time stamp.
2620 return (PCAP_WARNING_TSTAMP_TYPE_NOTSUP);
2624 pcap_set_immediate_mode(pcap_t *p, int immediate)
2626 if (pcap_check_activated(p))
2627 return (PCAP_ERROR_ACTIVATED);
2628 p->opt.immediate = immediate;
2633 pcap_set_buffer_size(pcap_t *p, int buffer_size)
2635 if (pcap_check_activated(p))
2636 return (PCAP_ERROR_ACTIVATED);
2637 if (buffer_size <= 0) {
2639 * Silently ignore invalid values.
2643 p->opt.buffer_size = buffer_size;
2648 pcap_set_tstamp_precision(pcap_t *p, int tstamp_precision)
2652 if (pcap_check_activated(p))
2653 return (PCAP_ERROR_ACTIVATED);
2656 * The argument should have been u_int, but that's too late
2657 * to change now - it's an API.
2659 if (tstamp_precision < 0)
2660 return (PCAP_ERROR_TSTAMP_PRECISION_NOTSUP);
2663 * If p->tstamp_precision_count is 0, we only support setting
2664 * the time stamp precision to microsecond precision; every
2665 * pcap module *MUST* support microsecond precision, even if
2666 * it does so by converting the native precision to
2669 if (p->tstamp_precision_count == 0) {
2670 if (tstamp_precision == PCAP_TSTAMP_PRECISION_MICRO) {
2671 p->opt.tstamp_precision = tstamp_precision;
2676 * Check whether we claim to support this precision of
2679 for (i = 0; i < p->tstamp_precision_count; i++) {
2680 if (p->tstamp_precision_list[i] == (u_int)tstamp_precision) {
2684 p->opt.tstamp_precision = tstamp_precision;
2691 * We don't support this time stamp precision.
2693 return (PCAP_ERROR_TSTAMP_PRECISION_NOTSUP);
2697 pcap_get_tstamp_precision(pcap_t *p)
2699 return (p->opt.tstamp_precision);
2703 pcap_activate(pcap_t *p)
2708 * Catch attempts to re-activate an already-activated
2709 * pcap_t; this should, for example, catch code that
2710 * calls pcap_open_live() followed by pcap_activate(),
2711 * as some code that showed up in a Stack Exchange
2714 if (pcap_check_activated(p))
2715 return (PCAP_ERROR_ACTIVATED);
2716 status = p->activate_op(p);
2719 * If somebody requested non-blocking mode before
2720 * calling pcap_activate(), turn it on now.
2722 if (p->opt.nonblock) {
2723 status = p->setnonblock_op(p, 1);
2726 * Failed. Undo everything done by
2727 * the activate operation.
2736 if (p->errbuf[0] == '\0') {
2738 * No error message supplied by the activate routine;
2739 * for the benefit of programs that don't specially
2740 * handle errors other than PCAP_ERROR, return the
2741 * error message corresponding to the status.
2743 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "%s",
2744 pcap_statustostr(status));
2748 * Undo any operation pointer setting, etc. done by
2749 * the activate operation.
2757 pcap_open_live(const char *device, int snaplen, int promisc, int to_ms, char *errbuf)
2761 #ifdef ENABLE_REMOTE
2762 char host[PCAP_BUF_SIZE + 1];
2763 char port[PCAP_BUF_SIZE + 1];
2764 char name[PCAP_BUF_SIZE + 1];
2768 * A null device name is equivalent to the "any" device -
2769 * which might not be supported on this platform, but
2770 * this means that you'll get a "not supported" error
2771 * rather than, say, a crash when we try to dereference
2778 * Retrofit - we have to make older applications compatible with
2780 * So we're calling pcap_open_remote() from here; this is a very
2782 * Obviously, we cannot exploit all the new features; for instance,
2783 * we cannot send authentication, we cannot use a UDP data connection,
2786 if (pcap_parsesrcstr(device, &srctype, host, port, name, errbuf))
2789 if (srctype == PCAP_SRC_IFREMOTE) {
2791 * Although we already have host, port and iface, we prefer
2792 * to pass only 'device' to pcap_open_rpcap(), so that it has
2793 * to call pcap_parsesrcstr() again.
2794 * This is less optimized, but much clearer.
2796 return (pcap_open_rpcap(device, snaplen,
2797 promisc ? PCAP_OPENFLAG_PROMISCUOUS : 0, to_ms,
2800 if (srctype == PCAP_SRC_FILE) {
2801 snprintf(errbuf, PCAP_ERRBUF_SIZE, "unknown URL scheme \"file\"");
2804 if (srctype == PCAP_SRC_IFLOCAL) {
2806 * If it starts with rpcap://, that refers to a local device
2807 * (no host part in the URL). Remove the rpcap://, and
2808 * fall through to the regular open path.
2810 if (strncmp(device, PCAP_SRC_IF_STRING, strlen(PCAP_SRC_IF_STRING)) == 0) {
2811 size_t len = strlen(device) - strlen(PCAP_SRC_IF_STRING) + 1;
2814 device += strlen(PCAP_SRC_IF_STRING);
2817 #endif /* ENABLE_REMOTE */
2819 p = pcap_create(device, errbuf);
2822 status = pcap_set_snaplen(p, snaplen);
2825 status = pcap_set_promisc(p, promisc);
2828 status = pcap_set_timeout(p, to_ms);
2832 * Mark this as opened with pcap_open_live(), so that, for
2833 * example, we show the full list of DLT_ values, rather
2834 * than just the ones that are compatible with capturing
2835 * when not in monitor mode. That allows existing applications
2836 * to work the way they used to work, but allows new applications
2837 * that know about the new open API to, for example, find out the
2838 * DLT_ values that they can select without changing whether
2839 * the adapter is in monitor mode or not.
2842 status = pcap_activate(p);
2847 if (status == PCAP_ERROR) {
2849 * Another buffer is a bit cumbersome, but it avoids
2850 * -Wformat-truncation.
2852 char trimbuf[PCAP_ERRBUF_SIZE - 5]; /* 2 bytes shorter */
2854 pcap_strlcpy(trimbuf, p->errbuf, sizeof(trimbuf));
2855 snprintf(errbuf, PCAP_ERRBUF_SIZE, "%s: %.*s", device,
2856 PCAP_ERRBUF_SIZE - 3, trimbuf);
2857 } else if (status == PCAP_ERROR_NO_SUCH_DEVICE ||
2858 status == PCAP_ERROR_PERM_DENIED ||
2859 status == PCAP_ERROR_PROMISC_PERM_DENIED) {
2861 * Only show the additional message if it's not
2864 if (p->errbuf[0] != '\0') {
2868 char trimbuf[PCAP_ERRBUF_SIZE - 8]; /* 2 bytes shorter */
2870 pcap_strlcpy(trimbuf, p->errbuf, sizeof(trimbuf));
2871 snprintf(errbuf, PCAP_ERRBUF_SIZE, "%s: %s (%.*s)",
2872 device, pcap_statustostr(status),
2873 PCAP_ERRBUF_SIZE - 6, trimbuf);
2875 snprintf(errbuf, PCAP_ERRBUF_SIZE, "%s: %s",
2876 device, pcap_statustostr(status));
2879 snprintf(errbuf, PCAP_ERRBUF_SIZE, "%s: %s", device,
2880 pcap_statustostr(status));
2887 pcap_open_offline_common(char *ebuf, size_t total_size, size_t private_offset)
2891 p = pcap_alloc_pcap_t(ebuf, total_size, private_offset);
2895 p->opt.tstamp_precision = PCAP_TSTAMP_PRECISION_MICRO;
2901 pcap_dispatch(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
2903 return (p->read_op(p, cnt, callback, user));
2907 pcap_loop(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
2912 if (p->rfile != NULL) {
2914 * 0 means EOF, so don't loop if we get 0.
2916 n = pcap_offline_read(p, cnt, callback, user);
2919 * XXX keep reading until we get something
2920 * (or an error occurs)
2923 n = p->read_op(p, cnt, callback, user);
2928 if (!PACKET_COUNT_IS_UNLIMITED(cnt)) {
2937 * Force the loop in "pcap_read()" or "pcap_read_offline()" to terminate.
2940 pcap_breakloop(pcap_t *p)
2946 pcap_datalink(pcap_t *p)
2949 return (PCAP_ERROR_NOT_ACTIVATED);
2950 return (p->linktype);
2954 pcap_datalink_ext(pcap_t *p)
2957 return (PCAP_ERROR_NOT_ACTIVATED);
2958 return (p->linktype_ext);
2962 pcap_list_datalinks(pcap_t *p, int **dlt_buffer)
2965 return (PCAP_ERROR_NOT_ACTIVATED);
2966 if (p->dlt_count == 0) {
2968 * We couldn't fetch the list of DLTs, which means
2969 * this platform doesn't support changing the
2970 * DLT for an interface. Return a list of DLTs
2971 * containing only the DLT this device supports.
2973 *dlt_buffer = (int*)malloc(sizeof(**dlt_buffer));
2974 if (*dlt_buffer == NULL) {
2975 pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf),
2977 return (PCAP_ERROR);
2979 **dlt_buffer = p->linktype;
2982 *dlt_buffer = (int*)calloc(sizeof(**dlt_buffer), p->dlt_count);
2983 if (*dlt_buffer == NULL) {
2984 pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf),
2986 return (PCAP_ERROR);
2988 (void)memcpy(*dlt_buffer, p->dlt_list,
2989 sizeof(**dlt_buffer) * p->dlt_count);
2990 return (p->dlt_count);
2995 * In Windows, you might have a library built with one version of the
2996 * C runtime library and an application built with another version of
2997 * the C runtime library, which means that the library might use one
2998 * version of malloc() and free() and the application might use another
2999 * version of malloc() and free(). If so, that means something
3000 * allocated by the library cannot be freed by the application, so we
3001 * need to have a pcap_free_datalinks() routine to free up the list
3002 * allocated by pcap_list_datalinks(), even though it's just a wrapper
3006 pcap_free_datalinks(int *dlt_list)
3012 pcap_set_datalink(pcap_t *p, int dlt)
3015 const char *dlt_name;
3020 if (p->dlt_count == 0 || p->set_datalink_op == NULL) {
3022 * We couldn't fetch the list of DLTs, or we don't
3023 * have a "set datalink" operation, which means
3024 * this platform doesn't support changing the
3025 * DLT for an interface. Check whether the new
3026 * DLT is the one this interface supports.
3028 if (p->linktype != dlt)
3032 * It is, so there's nothing we need to do here.
3036 for (i = 0; i < p->dlt_count; i++)
3037 if (p->dlt_list[i] == (u_int)dlt)
3039 if (i >= p->dlt_count)
3041 if (p->dlt_count == 2 && p->dlt_list[0] == DLT_EN10MB &&
3042 dlt == DLT_DOCSIS) {
3044 * This is presumably an Ethernet device, as the first
3045 * link-layer type it offers is DLT_EN10MB, and the only
3046 * other type it offers is DLT_DOCSIS. That means that
3047 * we can't tell the driver to supply DOCSIS link-layer
3048 * headers - we're just pretending that's what we're
3049 * getting, as, presumably, we're capturing on a dedicated
3050 * link to a Cisco Cable Modem Termination System, and
3051 * it's putting raw DOCSIS frames on the wire inside low-level
3057 if (p->set_datalink_op(p, dlt) == -1)
3063 dlt_name = pcap_datalink_val_to_name(dlt);
3064 if (dlt_name != NULL) {
3065 (void) snprintf(p->errbuf, sizeof(p->errbuf),
3066 "%s is not one of the DLTs supported by this device",
3069 (void) snprintf(p->errbuf, sizeof(p->errbuf),
3070 "DLT %d is not one of the DLTs supported by this device",
3077 * This array is designed for mapping upper and lower case letter
3078 * together for a case independent comparison. The mappings are
3079 * based upon ascii character sequences.
3081 static const u_char charmap[] = {
3082 (u_char)'\000', (u_char)'\001', (u_char)'\002', (u_char)'\003',
3083 (u_char)'\004', (u_char)'\005', (u_char)'\006', (u_char)'\007',
3084 (u_char)'\010', (u_char)'\011', (u_char)'\012', (u_char)'\013',
3085 (u_char)'\014', (u_char)'\015', (u_char)'\016', (u_char)'\017',
3086 (u_char)'\020', (u_char)'\021', (u_char)'\022', (u_char)'\023',
3087 (u_char)'\024', (u_char)'\025', (u_char)'\026', (u_char)'\027',
3088 (u_char)'\030', (u_char)'\031', (u_char)'\032', (u_char)'\033',
3089 (u_char)'\034', (u_char)'\035', (u_char)'\036', (u_char)'\037',
3090 (u_char)'\040', (u_char)'\041', (u_char)'\042', (u_char)'\043',
3091 (u_char)'\044', (u_char)'\045', (u_char)'\046', (u_char)'\047',
3092 (u_char)'\050', (u_char)'\051', (u_char)'\052', (u_char)'\053',
3093 (u_char)'\054', (u_char)'\055', (u_char)'\056', (u_char)'\057',
3094 (u_char)'\060', (u_char)'\061', (u_char)'\062', (u_char)'\063',
3095 (u_char)'\064', (u_char)'\065', (u_char)'\066', (u_char)'\067',
3096 (u_char)'\070', (u_char)'\071', (u_char)'\072', (u_char)'\073',
3097 (u_char)'\074', (u_char)'\075', (u_char)'\076', (u_char)'\077',
3098 (u_char)'\100', (u_char)'\141', (u_char)'\142', (u_char)'\143',
3099 (u_char)'\144', (u_char)'\145', (u_char)'\146', (u_char)'\147',
3100 (u_char)'\150', (u_char)'\151', (u_char)'\152', (u_char)'\153',
3101 (u_char)'\154', (u_char)'\155', (u_char)'\156', (u_char)'\157',
3102 (u_char)'\160', (u_char)'\161', (u_char)'\162', (u_char)'\163',
3103 (u_char)'\164', (u_char)'\165', (u_char)'\166', (u_char)'\167',
3104 (u_char)'\170', (u_char)'\171', (u_char)'\172', (u_char)'\133',
3105 (u_char)'\134', (u_char)'\135', (u_char)'\136', (u_char)'\137',
3106 (u_char)'\140', (u_char)'\141', (u_char)'\142', (u_char)'\143',
3107 (u_char)'\144', (u_char)'\145', (u_char)'\146', (u_char)'\147',
3108 (u_char)'\150', (u_char)'\151', (u_char)'\152', (u_char)'\153',
3109 (u_char)'\154', (u_char)'\155', (u_char)'\156', (u_char)'\157',
3110 (u_char)'\160', (u_char)'\161', (u_char)'\162', (u_char)'\163',
3111 (u_char)'\164', (u_char)'\165', (u_char)'\166', (u_char)'\167',
3112 (u_char)'\170', (u_char)'\171', (u_char)'\172', (u_char)'\173',
3113 (u_char)'\174', (u_char)'\175', (u_char)'\176', (u_char)'\177',
3114 (u_char)'\200', (u_char)'\201', (u_char)'\202', (u_char)'\203',
3115 (u_char)'\204', (u_char)'\205', (u_char)'\206', (u_char)'\207',
3116 (u_char)'\210', (u_char)'\211', (u_char)'\212', (u_char)'\213',
3117 (u_char)'\214', (u_char)'\215', (u_char)'\216', (u_char)'\217',
3118 (u_char)'\220', (u_char)'\221', (u_char)'\222', (u_char)'\223',
3119 (u_char)'\224', (u_char)'\225', (u_char)'\226', (u_char)'\227',
3120 (u_char)'\230', (u_char)'\231', (u_char)'\232', (u_char)'\233',
3121 (u_char)'\234', (u_char)'\235', (u_char)'\236', (u_char)'\237',
3122 (u_char)'\240', (u_char)'\241', (u_char)'\242', (u_char)'\243',
3123 (u_char)'\244', (u_char)'\245', (u_char)'\246', (u_char)'\247',
3124 (u_char)'\250', (u_char)'\251', (u_char)'\252', (u_char)'\253',
3125 (u_char)'\254', (u_char)'\255', (u_char)'\256', (u_char)'\257',
3126 (u_char)'\260', (u_char)'\261', (u_char)'\262', (u_char)'\263',
3127 (u_char)'\264', (u_char)'\265', (u_char)'\266', (u_char)'\267',
3128 (u_char)'\270', (u_char)'\271', (u_char)'\272', (u_char)'\273',
3129 (u_char)'\274', (u_char)'\275', (u_char)'\276', (u_char)'\277',
3130 (u_char)'\300', (u_char)'\341', (u_char)'\342', (u_char)'\343',
3131 (u_char)'\344', (u_char)'\345', (u_char)'\346', (u_char)'\347',
3132 (u_char)'\350', (u_char)'\351', (u_char)'\352', (u_char)'\353',
3133 (u_char)'\354', (u_char)'\355', (u_char)'\356', (u_char)'\357',
3134 (u_char)'\360', (u_char)'\361', (u_char)'\362', (u_char)'\363',
3135 (u_char)'\364', (u_char)'\365', (u_char)'\366', (u_char)'\367',
3136 (u_char)'\370', (u_char)'\371', (u_char)'\372', (u_char)'\333',
3137 (u_char)'\334', (u_char)'\335', (u_char)'\336', (u_char)'\337',
3138 (u_char)'\340', (u_char)'\341', (u_char)'\342', (u_char)'\343',
3139 (u_char)'\344', (u_char)'\345', (u_char)'\346', (u_char)'\347',
3140 (u_char)'\350', (u_char)'\351', (u_char)'\352', (u_char)'\353',
3141 (u_char)'\354', (u_char)'\355', (u_char)'\356', (u_char)'\357',
3142 (u_char)'\360', (u_char)'\361', (u_char)'\362', (u_char)'\363',
3143 (u_char)'\364', (u_char)'\365', (u_char)'\366', (u_char)'\367',
3144 (u_char)'\370', (u_char)'\371', (u_char)'\372', (u_char)'\373',
3145 (u_char)'\374', (u_char)'\375', (u_char)'\376', (u_char)'\377',
3149 pcap_strcasecmp(const char *s1, const char *s2)
3151 register const u_char *cm = charmap,
3152 *us1 = (const u_char *)s1,
3153 *us2 = (const u_char *)s2;
3155 while (cm[*us1] == cm[*us2++])
3158 return (cm[*us1] - cm[*--us2]);
3163 const char *description;
3167 #define DLT_CHOICE(code, description) { #code, description, DLT_ ## code }
3168 #define DLT_CHOICE_SENTINEL { NULL, NULL, 0 }
3170 static struct dlt_choice dlt_choices[] = {
3171 DLT_CHOICE(NULL, "BSD loopback"),
3172 DLT_CHOICE(EN10MB, "Ethernet"),
3173 DLT_CHOICE(IEEE802, "Token ring"),
3174 DLT_CHOICE(ARCNET, "BSD ARCNET"),
3175 DLT_CHOICE(SLIP, "SLIP"),
3176 DLT_CHOICE(PPP, "PPP"),
3177 DLT_CHOICE(FDDI, "FDDI"),
3178 DLT_CHOICE(ATM_RFC1483, "RFC 1483 LLC-encapsulated ATM"),
3179 DLT_CHOICE(RAW, "Raw IP"),
3180 DLT_CHOICE(SLIP_BSDOS, "BSD/OS SLIP"),
3181 DLT_CHOICE(PPP_BSDOS, "BSD/OS PPP"),
3182 DLT_CHOICE(ATM_CLIP, "Linux Classical IP over ATM"),
3183 DLT_CHOICE(PPP_SERIAL, "PPP over serial"),
3184 DLT_CHOICE(PPP_ETHER, "PPPoE"),
3185 DLT_CHOICE(SYMANTEC_FIREWALL, "Symantec Firewall"),
3186 DLT_CHOICE(C_HDLC, "Cisco HDLC"),
3187 DLT_CHOICE(IEEE802_11, "802.11"),
3188 DLT_CHOICE(FRELAY, "Frame Relay"),
3189 DLT_CHOICE(LOOP, "OpenBSD loopback"),
3190 DLT_CHOICE(ENC, "OpenBSD encapsulated IP"),
3191 DLT_CHOICE(LINUX_SLL, "Linux cooked v1"),
3192 DLT_CHOICE(LTALK, "Localtalk"),
3193 DLT_CHOICE(PFLOG, "OpenBSD pflog file"),
3194 DLT_CHOICE(PFSYNC, "Packet filter state syncing"),
3195 DLT_CHOICE(PRISM_HEADER, "802.11 plus Prism header"),
3196 DLT_CHOICE(IP_OVER_FC, "RFC 2625 IP-over-Fibre Channel"),
3197 DLT_CHOICE(SUNATM, "Sun raw ATM"),
3198 DLT_CHOICE(IEEE802_11_RADIO, "802.11 plus radiotap header"),
3199 DLT_CHOICE(ARCNET_LINUX, "Linux ARCNET"),
3200 DLT_CHOICE(JUNIPER_MLPPP, "Juniper Multi-Link PPP"),
3201 DLT_CHOICE(JUNIPER_MLFR, "Juniper Multi-Link Frame Relay"),
3202 DLT_CHOICE(JUNIPER_ES, "Juniper Encryption Services PIC"),
3203 DLT_CHOICE(JUNIPER_GGSN, "Juniper GGSN PIC"),
3204 DLT_CHOICE(JUNIPER_MFR, "Juniper FRF.16 Frame Relay"),
3205 DLT_CHOICE(JUNIPER_ATM2, "Juniper ATM2 PIC"),
3206 DLT_CHOICE(JUNIPER_SERVICES, "Juniper Advanced Services PIC"),
3207 DLT_CHOICE(JUNIPER_ATM1, "Juniper ATM1 PIC"),
3208 DLT_CHOICE(APPLE_IP_OVER_IEEE1394, "Apple IP-over-IEEE 1394"),
3209 DLT_CHOICE(MTP2_WITH_PHDR, "SS7 MTP2 with Pseudo-header"),
3210 DLT_CHOICE(MTP2, "SS7 MTP2"),
3211 DLT_CHOICE(MTP3, "SS7 MTP3"),
3212 DLT_CHOICE(SCCP, "SS7 SCCP"),
3213 DLT_CHOICE(DOCSIS, "DOCSIS"),
3214 DLT_CHOICE(LINUX_IRDA, "Linux IrDA"),
3215 DLT_CHOICE(IEEE802_11_RADIO_AVS, "802.11 plus AVS radio information header"),
3216 DLT_CHOICE(JUNIPER_MONITOR, "Juniper Passive Monitor PIC"),
3217 DLT_CHOICE(BACNET_MS_TP, "BACnet MS/TP"),
3218 DLT_CHOICE(PPP_PPPD, "PPP for pppd, with direction flag"),
3219 DLT_CHOICE(JUNIPER_PPPOE, "Juniper PPPoE"),
3220 DLT_CHOICE(JUNIPER_PPPOE_ATM, "Juniper PPPoE/ATM"),
3221 DLT_CHOICE(GPRS_LLC, "GPRS LLC"),
3222 DLT_CHOICE(GPF_T, "GPF-T"),
3223 DLT_CHOICE(GPF_F, "GPF-F"),
3224 DLT_CHOICE(JUNIPER_PIC_PEER, "Juniper PIC Peer"),
3225 DLT_CHOICE(ERF_ETH, "Ethernet with Endace ERF header"),
3226 DLT_CHOICE(ERF_POS, "Packet-over-SONET with Endace ERF header"),
3227 DLT_CHOICE(LINUX_LAPD, "Linux vISDN LAPD"),
3228 DLT_CHOICE(JUNIPER_ETHER, "Juniper Ethernet"),
3229 DLT_CHOICE(JUNIPER_PPP, "Juniper PPP"),
3230 DLT_CHOICE(JUNIPER_FRELAY, "Juniper Frame Relay"),
3231 DLT_CHOICE(JUNIPER_CHDLC, "Juniper C-HDLC"),
3232 DLT_CHOICE(MFR, "FRF.16 Frame Relay"),
3233 DLT_CHOICE(JUNIPER_VP, "Juniper Voice PIC"),
3234 DLT_CHOICE(A429, "Arinc 429"),
3235 DLT_CHOICE(A653_ICM, "Arinc 653 Interpartition Communication"),
3236 DLT_CHOICE(USB_FREEBSD, "USB with FreeBSD header"),
3237 DLT_CHOICE(BLUETOOTH_HCI_H4, "Bluetooth HCI UART transport layer"),
3238 DLT_CHOICE(IEEE802_16_MAC_CPS, "IEEE 802.16 MAC Common Part Sublayer"),
3239 DLT_CHOICE(USB_LINUX, "USB with Linux header"),
3240 DLT_CHOICE(CAN20B, "Controller Area Network (CAN) v. 2.0B"),
3241 DLT_CHOICE(IEEE802_15_4_LINUX, "IEEE 802.15.4 with Linux padding"),
3242 DLT_CHOICE(PPI, "Per-Packet Information"),
3243 DLT_CHOICE(IEEE802_16_MAC_CPS_RADIO, "IEEE 802.16 MAC Common Part Sublayer plus radiotap header"),
3244 DLT_CHOICE(JUNIPER_ISM, "Juniper Integrated Service Module"),
3245 DLT_CHOICE(IEEE802_15_4, "IEEE 802.15.4 with FCS"),
3246 DLT_CHOICE(SITA, "SITA pseudo-header"),
3247 DLT_CHOICE(ERF, "Endace ERF header"),
3248 DLT_CHOICE(RAIF1, "Ethernet with u10 Networks pseudo-header"),
3249 DLT_CHOICE(IPMB_KONTRON, "IPMB with Kontron pseudo-header"),
3250 DLT_CHOICE(JUNIPER_ST, "Juniper Secure Tunnel"),
3251 DLT_CHOICE(BLUETOOTH_HCI_H4_WITH_PHDR, "Bluetooth HCI UART transport layer plus pseudo-header"),
3252 DLT_CHOICE(AX25_KISS, "AX.25 with KISS header"),
3253 DLT_CHOICE(IPMB_LINUX, "IPMB with Linux/Pigeon Point pseudo-header"),
3254 DLT_CHOICE(IEEE802_15_4_NONASK_PHY, "IEEE 802.15.4 with non-ASK PHY data"),
3255 DLT_CHOICE(MPLS, "MPLS with label as link-layer header"),
3256 DLT_CHOICE(LINUX_EVDEV, "Linux evdev events"),
3257 DLT_CHOICE(USB_LINUX_MMAPPED, "USB with padded Linux header"),
3258 DLT_CHOICE(DECT, "DECT"),
3259 DLT_CHOICE(AOS, "AOS Space Data Link protocol"),
3260 DLT_CHOICE(WIHART, "Wireless HART"),
3261 DLT_CHOICE(FC_2, "Fibre Channel FC-2"),
3262 DLT_CHOICE(FC_2_WITH_FRAME_DELIMS, "Fibre Channel FC-2 with frame delimiters"),
3263 DLT_CHOICE(IPNET, "Solaris ipnet"),
3264 DLT_CHOICE(CAN_SOCKETCAN, "CAN-bus with SocketCAN headers"),
3265 DLT_CHOICE(IPV4, "Raw IPv4"),
3266 DLT_CHOICE(IPV6, "Raw IPv6"),
3267 DLT_CHOICE(IEEE802_15_4_NOFCS, "IEEE 802.15.4 without FCS"),
3268 DLT_CHOICE(DBUS, "D-Bus"),
3269 DLT_CHOICE(JUNIPER_VS, "Juniper Virtual Server"),
3270 DLT_CHOICE(JUNIPER_SRX_E2E, "Juniper SRX E2E"),
3271 DLT_CHOICE(JUNIPER_FIBRECHANNEL, "Juniper Fibre Channel"),
3272 DLT_CHOICE(DVB_CI, "DVB-CI"),
3273 DLT_CHOICE(MUX27010, "MUX27010"),
3274 DLT_CHOICE(STANAG_5066_D_PDU, "STANAG 5066 D_PDUs"),
3275 DLT_CHOICE(JUNIPER_ATM_CEMIC, "Juniper ATM CEMIC"),
3276 DLT_CHOICE(NFLOG, "Linux netfilter log messages"),
3277 DLT_CHOICE(NETANALYZER, "Ethernet with Hilscher netANALYZER pseudo-header"),
3278 DLT_CHOICE(NETANALYZER_TRANSPARENT, "Ethernet with Hilscher netANALYZER pseudo-header and with preamble and SFD"),
3279 DLT_CHOICE(IPOIB, "RFC 4391 IP-over-Infiniband"),
3280 DLT_CHOICE(MPEG_2_TS, "MPEG-2 transport stream"),
3281 DLT_CHOICE(NG40, "ng40 protocol tester Iub/Iur"),
3282 DLT_CHOICE(NFC_LLCP, "NFC LLCP PDUs with pseudo-header"),
3283 DLT_CHOICE(INFINIBAND, "InfiniBand"),
3284 DLT_CHOICE(SCTP, "SCTP"),
3285 DLT_CHOICE(USBPCAP, "USB with USBPcap header"),
3286 DLT_CHOICE(RTAC_SERIAL, "Schweitzer Engineering Laboratories RTAC packets"),
3287 DLT_CHOICE(BLUETOOTH_LE_LL, "Bluetooth Low Energy air interface"),
3288 DLT_CHOICE(NETLINK, "Linux netlink"),
3289 DLT_CHOICE(BLUETOOTH_LINUX_MONITOR, "Bluetooth Linux Monitor"),
3290 DLT_CHOICE(BLUETOOTH_BREDR_BB, "Bluetooth Basic Rate/Enhanced Data Rate baseband packets"),
3291 DLT_CHOICE(BLUETOOTH_LE_LL_WITH_PHDR, "Bluetooth Low Energy air interface with pseudo-header"),
3292 DLT_CHOICE(PROFIBUS_DL, "PROFIBUS data link layer"),
3293 DLT_CHOICE(PKTAP, "Apple DLT_PKTAP"),
3294 DLT_CHOICE(EPON, "Ethernet with 802.3 Clause 65 EPON preamble"),
3295 DLT_CHOICE(IPMI_HPM_2, "IPMI trace packets"),
3296 DLT_CHOICE(ZWAVE_R1_R2, "Z-Wave RF profile R1 and R2 packets"),
3297 DLT_CHOICE(ZWAVE_R3, "Z-Wave RF profile R3 packets"),
3298 DLT_CHOICE(WATTSTOPPER_DLM, "WattStopper Digital Lighting Management (DLM) and Legrand Nitoo Open protocol"),
3299 DLT_CHOICE(ISO_14443, "ISO 14443 messages"),
3300 DLT_CHOICE(RDS, "IEC 62106 Radio Data System groups"),
3301 DLT_CHOICE(USB_DARWIN, "USB with Darwin header"),
3302 DLT_CHOICE(OPENFLOW, "OpenBSD DLT_OPENFLOW"),
3303 DLT_CHOICE(SDLC, "IBM SDLC frames"),
3304 DLT_CHOICE(TI_LLN_SNIFFER, "TI LLN sniffer frames"),
3305 DLT_CHOICE(VSOCK, "Linux vsock"),
3306 DLT_CHOICE(NORDIC_BLE, "Nordic Semiconductor Bluetooth LE sniffer frames"),
3307 DLT_CHOICE(DOCSIS31_XRA31, "Excentis XRA-31 DOCSIS 3.1 RF sniffer frames"),
3308 DLT_CHOICE(ETHERNET_MPACKET, "802.3br mPackets"),
3309 DLT_CHOICE(DISPLAYPORT_AUX, "DisplayPort AUX channel monitoring data"),
3310 DLT_CHOICE(LINUX_SLL2, "Linux cooked v2"),
3311 DLT_CHOICE(OPENVIZSLA, "OpenVizsla USB"),
3312 DLT_CHOICE(EBHSCR, "Elektrobit High Speed Capture and Replay (EBHSCR)"),
3313 DLT_CHOICE(VPP_DISPATCH, "VPP graph dispatch tracer"),
3314 DLT_CHOICE(DSA_TAG_BRCM, "Broadcom tag"),
3315 DLT_CHOICE(DSA_TAG_BRCM_PREPEND, "Broadcom tag (prepended)"),
3316 DLT_CHOICE(IEEE802_15_4_TAP, "IEEE 802.15.4 with pseudo-header"),
3317 DLT_CHOICE(DSA_TAG_DSA, "Marvell DSA"),
3318 DLT_CHOICE(DSA_TAG_EDSA, "Marvell EDSA"),
3319 DLT_CHOICE(ELEE, "ELEE lawful intercept packets"),
3320 DLT_CHOICE(Z_WAVE_SERIAL, "Z-Wave serial frames between host and chip"),
3321 DLT_CHOICE(USB_2_0, "USB 2.0/1.1/1.0 as transmitted over the cable"),
3322 DLT_CHOICE(ATSC_ALP, "ATSC Link-Layer Protocol packets"),
3327 pcap_datalink_name_to_val(const char *name)
3331 for (i = 0; dlt_choices[i].name != NULL; i++) {
3332 if (pcap_strcasecmp(dlt_choices[i].name, name) == 0)
3333 return (dlt_choices[i].dlt);
3339 pcap_datalink_val_to_name(int dlt)
3343 for (i = 0; dlt_choices[i].name != NULL; i++) {
3344 if (dlt_choices[i].dlt == dlt)
3345 return (dlt_choices[i].name);
3351 pcap_datalink_val_to_description(int dlt)
3355 for (i = 0; dlt_choices[i].name != NULL; i++) {
3356 if (dlt_choices[i].dlt == dlt)
3357 return (dlt_choices[i].description);
3363 pcap_datalink_val_to_description_or_dlt(int dlt)
3365 static char unkbuf[40];
3366 const char *description;
3368 description = pcap_datalink_val_to_description(dlt);
3369 if (description != NULL) {
3372 (void)snprintf(unkbuf, sizeof(unkbuf), "DLT %d", dlt);
3377 struct tstamp_type_choice {
3379 const char *description;
3383 static struct tstamp_type_choice tstamp_type_choices[] = {
3384 { "host", "Host", PCAP_TSTAMP_HOST },
3385 { "host_lowprec", "Host, low precision", PCAP_TSTAMP_HOST_LOWPREC },
3386 { "host_hiprec", "Host, high precision", PCAP_TSTAMP_HOST_HIPREC },
3387 { "adapter", "Adapter", PCAP_TSTAMP_ADAPTER },
3388 { "adapter_unsynced", "Adapter, not synced with system time", PCAP_TSTAMP_ADAPTER_UNSYNCED },
3389 { "host_hiprec_unsynced", "Host, high precision, not synced with system time", PCAP_TSTAMP_HOST_HIPREC_UNSYNCED },
3394 pcap_tstamp_type_name_to_val(const char *name)
3398 for (i = 0; tstamp_type_choices[i].name != NULL; i++) {
3399 if (pcap_strcasecmp(tstamp_type_choices[i].name, name) == 0)
3400 return (tstamp_type_choices[i].type);
3402 return (PCAP_ERROR);
3406 pcap_tstamp_type_val_to_name(int tstamp_type)
3410 for (i = 0; tstamp_type_choices[i].name != NULL; i++) {
3411 if (tstamp_type_choices[i].type == tstamp_type)
3412 return (tstamp_type_choices[i].name);
3418 pcap_tstamp_type_val_to_description(int tstamp_type)
3422 for (i = 0; tstamp_type_choices[i].name != NULL; i++) {
3423 if (tstamp_type_choices[i].type == tstamp_type)
3424 return (tstamp_type_choices[i].description);
3430 pcap_snapshot(pcap_t *p)
3433 return (PCAP_ERROR_NOT_ACTIVATED);
3434 return (p->snapshot);
3438 pcap_is_swapped(pcap_t *p)
3441 return (PCAP_ERROR_NOT_ACTIVATED);
3442 return (p->swapped);
3446 pcap_major_version(pcap_t *p)
3449 return (PCAP_ERROR_NOT_ACTIVATED);
3450 return (p->version_major);
3454 pcap_minor_version(pcap_t *p)
3457 return (PCAP_ERROR_NOT_ACTIVATED);
3458 return (p->version_minor);
3462 pcap_bufsize(pcap_t *p)
3465 return (PCAP_ERROR_NOT_ACTIVATED);
3466 return (p->bufsize);
3470 pcap_file(pcap_t *p)
3477 pcap_fileno(pcap_t *p)
3479 if (p->handle != INVALID_HANDLE_VALUE) {
3481 * This is a bogus and now-deprecated API; we
3482 * squelch the narrowing warning for the cast
3483 * from HANDLE to intptr_t. If Windows programmmers
3484 * need to get at the HANDLE for a pcap_t, *if*
3485 * there is one, they should request such a
3486 * routine (and be prepared for it to return
3487 * INVALID_HANDLE_VALUE).
3490 return ((int)(intptr_t)p->handle);
3493 return (PCAP_ERROR);
3497 pcap_fileno(pcap_t *p)
3503 #if !defined(_WIN32) && !defined(MSDOS)
3505 pcap_get_selectable_fd(pcap_t *p)
3507 return (p->selectable_fd);
3510 const struct timeval *
3511 pcap_get_required_select_timeout(pcap_t *p)
3513 return (p->required_select_timeout);
3518 pcap_perror(pcap_t *p, const char *prefix)
3520 fprintf(stderr, "%s: %s\n", prefix, p->errbuf);
3524 pcap_geterr(pcap_t *p)
3530 pcap_getnonblock(pcap_t *p, char *errbuf)
3534 ret = p->getnonblock_op(p);
3537 * The get nonblock operation sets p->errbuf; this
3538 * function *shouldn't* have had a separate errbuf
3539 * argument, as it didn't need one, but I goofed
3542 * We copy the error message to errbuf, so callers
3543 * can find it in either place.
3545 pcap_strlcpy(errbuf, p->errbuf, PCAP_ERRBUF_SIZE);
3551 * Get the current non-blocking mode setting, under the assumption that
3552 * it's just the standard POSIX non-blocking flag.
3554 #if !defined(_WIN32) && !defined(MSDOS)
3556 pcap_getnonblock_fd(pcap_t *p)
3560 fdflags = fcntl(p->fd, F_GETFL, 0);
3561 if (fdflags == -1) {
3562 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
3566 if (fdflags & O_NONBLOCK)
3574 pcap_setnonblock(pcap_t *p, int nonblock, char *errbuf)
3578 ret = p->setnonblock_op(p, nonblock);
3581 * The set nonblock operation sets p->errbuf; this
3582 * function *shouldn't* have had a separate errbuf
3583 * argument, as it didn't need one, but I goofed
3586 * We copy the error message to errbuf, so callers
3587 * can find it in either place.
3589 pcap_strlcpy(errbuf, p->errbuf, PCAP_ERRBUF_SIZE);
3594 #if !defined(_WIN32) && !defined(MSDOS)
3596 * Set non-blocking mode, under the assumption that it's just the
3597 * standard POSIX non-blocking flag. (This can be called by the
3598 * per-platform non-blocking-mode routine if that routine also
3599 * needs to do some additional work.)
3602 pcap_setnonblock_fd(pcap_t *p, int nonblock)
3606 fdflags = fcntl(p->fd, F_GETFL, 0);
3607 if (fdflags == -1) {
3608 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
3613 fdflags |= O_NONBLOCK;
3615 fdflags &= ~O_NONBLOCK;
3616 if (fcntl(p->fd, F_SETFL, fdflags) == -1) {
3617 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
3626 * Generate error strings for PCAP_ERROR_ and PCAP_WARNING_ values.
3629 pcap_statustostr(int errnum)
3631 static char ebuf[15+10+1];
3636 return("Generic warning");
3638 case PCAP_WARNING_TSTAMP_TYPE_NOTSUP:
3639 return ("That type of time stamp is not supported by that device");
3641 case PCAP_WARNING_PROMISC_NOTSUP:
3642 return ("That device doesn't support promiscuous mode");
3645 return("Generic error");
3647 case PCAP_ERROR_BREAK:
3648 return("Loop terminated by pcap_breakloop");
3650 case PCAP_ERROR_NOT_ACTIVATED:
3651 return("The pcap_t has not been activated");
3653 case PCAP_ERROR_ACTIVATED:
3654 return ("The setting can't be changed after the pcap_t is activated");
3656 case PCAP_ERROR_NO_SUCH_DEVICE:
3657 return ("No such device exists");
3659 case PCAP_ERROR_RFMON_NOTSUP:
3660 return ("That device doesn't support monitor mode");
3662 case PCAP_ERROR_NOT_RFMON:
3663 return ("That operation is supported only in monitor mode");
3665 case PCAP_ERROR_PERM_DENIED:
3666 return ("You don't have permission to perform this capture on that device");
3668 case PCAP_ERROR_IFACE_NOT_UP:
3669 return ("That device is not up");
3671 case PCAP_ERROR_CANTSET_TSTAMP_TYPE:
3672 return ("That device doesn't support setting the time stamp type");
3674 case PCAP_ERROR_PROMISC_PERM_DENIED:
3675 return ("You don't have permission to capture in promiscuous mode on that device");
3677 case PCAP_ERROR_TSTAMP_PRECISION_NOTSUP:
3678 return ("That device doesn't support that time stamp precision");
3680 (void)snprintf(ebuf, sizeof ebuf, "Unknown error: %d", errnum);
3685 * Not all systems have strerror().
3688 pcap_strerror(int errnum)
3690 #ifdef HAVE_STRERROR
3692 static char errbuf[PCAP_ERRBUF_SIZE];
3693 errno_t err = strerror_s(errbuf, PCAP_ERRBUF_SIZE, errnum);
3695 if (err != 0) /* err = 0 if successful */
3696 pcap_strlcpy(errbuf, "strerror_s() error", PCAP_ERRBUF_SIZE);
3699 return (strerror(errnum));
3702 extern int sys_nerr;
3703 extern const char *const sys_errlist[];
3704 static char errbuf[PCAP_ERRBUF_SIZE];
3706 if ((unsigned int)errnum < sys_nerr)
3707 return ((char *)sys_errlist[errnum]);
3708 (void)snprintf(errbuf, sizeof errbuf, "Unknown error: %d", errnum);
3714 pcap_setfilter(pcap_t *p, struct bpf_program *fp)
3716 return (p->setfilter_op(p, fp));
3720 * Set direction flag, which controls whether we accept only incoming
3721 * packets, only outgoing packets, or both.
3722 * Note that, depending on the platform, some or all direction arguments
3723 * might not be supported.
3726 pcap_setdirection(pcap_t *p, pcap_direction_t d)
3728 if (p->setdirection_op == NULL) {
3729 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
3730 "Setting direction is not supported on this device");
3741 return (p->setdirection_op(p, d));
3745 * Invalid direction.
3747 snprintf(p->errbuf, sizeof(p->errbuf),
3748 "Invalid direction");
3755 pcap_stats(pcap_t *p, struct pcap_stat *ps)
3757 return (p->stats_op(p, ps));
3762 pcap_stats_ex(pcap_t *p, int *pcap_stat_size)
3764 return (p->stats_ex_op(p, pcap_stat_size));
3768 pcap_setbuff(pcap_t *p, int dim)
3770 return (p->setbuff_op(p, dim));
3774 pcap_setmode(pcap_t *p, int mode)
3776 return (p->setmode_op(p, mode));
3780 pcap_setmintocopy(pcap_t *p, int size)
3782 return (p->setmintocopy_op(p, size));
3786 pcap_getevent(pcap_t *p)
3788 return (p->getevent_op(p));
3792 pcap_oid_get_request(pcap_t *p, bpf_u_int32 oid, void *data, size_t *lenp)
3794 return (p->oid_get_request_op(p, oid, data, lenp));
3798 pcap_oid_set_request(pcap_t *p, bpf_u_int32 oid, const void *data, size_t *lenp)
3800 return (p->oid_set_request_op(p, oid, data, lenp));
3804 pcap_sendqueue_alloc(u_int memsize)
3806 pcap_send_queue *tqueue;
3808 /* Allocate the queue */
3809 tqueue = (pcap_send_queue *)malloc(sizeof(pcap_send_queue));
3810 if (tqueue == NULL){
3814 /* Allocate the buffer */
3815 tqueue->buffer = (char *)malloc(memsize);
3816 if (tqueue->buffer == NULL) {
3821 tqueue->maxlen = memsize;
3828 pcap_sendqueue_destroy(pcap_send_queue *queue)
3830 free(queue->buffer);
3835 pcap_sendqueue_queue(pcap_send_queue *queue, const struct pcap_pkthdr *pkt_header, const u_char *pkt_data)
3837 if (queue->len + sizeof(struct pcap_pkthdr) + pkt_header->caplen > queue->maxlen){
3841 /* Copy the pcap_pkthdr header*/
3842 memcpy(queue->buffer + queue->len, pkt_header, sizeof(struct pcap_pkthdr));
3843 queue->len += sizeof(struct pcap_pkthdr);
3845 /* copy the packet */
3846 memcpy(queue->buffer + queue->len, pkt_data, pkt_header->caplen);
3847 queue->len += pkt_header->caplen;
3853 pcap_sendqueue_transmit(pcap_t *p, pcap_send_queue *queue, int sync)
3855 return (p->sendqueue_transmit_op(p, queue, sync));
3859 pcap_setuserbuffer(pcap_t *p, int size)
3861 return (p->setuserbuffer_op(p, size));
3865 pcap_live_dump(pcap_t *p, char *filename, int maxsize, int maxpacks)
3867 return (p->live_dump_op(p, filename, maxsize, maxpacks));
3871 pcap_live_dump_ended(pcap_t *p, int sync)
3873 return (p->live_dump_ended_op(p, sync));
3877 pcap_get_airpcap_handle(pcap_t *p)
3879 PAirpcapHandle handle;
3881 handle = p->get_airpcap_handle_op(p);
3882 if (handle == NULL) {
3883 (void)snprintf(p->errbuf, sizeof(p->errbuf),
3884 "This isn't an AirPcap device");
3891 * On some platforms, we need to clean up promiscuous or monitor mode
3892 * when we close a device - and we want that to happen even if the
3893 * application just exits without explicitl closing devices.
3894 * On those platforms, we need to register a "close all the pcaps"
3895 * routine to be called when we exit, and need to maintain a list of
3896 * pcaps that need to be closed to clean up modes.
3898 * XXX - not thread-safe.
3902 * List of pcaps on which we've done something that needs to be
3904 * If there are any such pcaps, we arrange to call "pcap_close_all()"
3905 * when we exit, and have it close all of them.
3907 static struct pcap *pcaps_to_close;
3910 * TRUE if we've already called "atexit()" to cause "pcap_close_all()" to
3911 * be called on exit.
3913 static int did_atexit;
3916 pcap_close_all(void)
3918 struct pcap *handle;
3920 while ((handle = pcaps_to_close) != NULL) {
3924 * If a pcap module adds a pcap_t to the "close all"
3925 * list by calling pcap_add_to_pcaps_to_close(), it
3926 * must have a cleanup routine that removes it from the
3927 * list, by calling pcap_remove_from_pcaps_to_close(),
3928 * and must make that cleanup routine the cleanup_op
3931 * That means that, after pcap_close() - which calls
3932 * the cleanup_op for the pcap_t - the pcap_t must
3933 * have been removed from the list, so pcaps_to_close
3934 * must not be equal to handle.
3936 * We check for that, and abort if handle is still
3937 * at the head of the list, to prevent infinite loops.
3939 if (pcaps_to_close == handle)
3945 pcap_do_addexit(pcap_t *p)
3948 * If we haven't already done so, arrange to have
3949 * "pcap_close_all()" called when we exit.
3952 if (atexit(pcap_close_all) != 0) {
3954 * "atexit()" failed; let our caller know.
3956 pcap_strlcpy(p->errbuf, "atexit failed", PCAP_ERRBUF_SIZE);
3965 pcap_add_to_pcaps_to_close(pcap_t *p)
3967 p->next = pcaps_to_close;
3972 pcap_remove_from_pcaps_to_close(pcap_t *p)
3974 pcap_t *pc, *prevpc;
3976 for (pc = pcaps_to_close, prevpc = NULL; pc != NULL;
3977 prevpc = pc, pc = pc->next) {
3980 * Found it. Remove it from the list.
3982 if (prevpc == NULL) {
3984 * It was at the head of the list.
3986 pcaps_to_close = pc->next;
3989 * It was in the middle of the list.
3991 prevpc->next = pc->next;
3999 pcap_breakloop_common(pcap_t *p)
4006 pcap_cleanup_live_common(pcap_t *p)
4008 if (p->opt.device != NULL) {
4009 free(p->opt.device);
4010 p->opt.device = NULL;
4012 if (p->buffer != NULL) {
4016 if (p->dlt_list != NULL) {
4021 if (p->tstamp_type_list != NULL) {
4022 free(p->tstamp_type_list);
4023 p->tstamp_type_list = NULL;
4024 p->tstamp_type_count = 0;
4026 if (p->tstamp_precision_list != NULL) {
4027 free(p->tstamp_precision_list);
4028 p->tstamp_precision_list = NULL;
4029 p->tstamp_precision_count = 0;
4031 pcap_freecode(&p->fcode);
4032 #if !defined(_WIN32) && !defined(MSDOS)
4037 p->selectable_fd = -1;
4042 * API compatible with WinPcap's "send a packet" routine - returns -1
4043 * on error, 0 otherwise.
4045 * XXX - what if we get a short write?
4048 pcap_sendpacket(pcap_t *p, const u_char *buf, int size)
4051 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
4052 errno, "The number of bytes to be sent must be positive");
4053 return (PCAP_ERROR);
4056 if (p->inject_op(p, buf, size) == -1)
4062 * API compatible with OpenBSD's "send a packet" routine - returns -1 on
4063 * error, number of bytes written otherwise.
4066 pcap_inject(pcap_t *p, const void *buf, size_t size)
4069 * We return the number of bytes written, so the number of
4070 * bytes to write must fit in an int.
4072 if (size > INT_MAX) {
4073 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
4074 errno, "More than %d bytes cannot be injected", INT_MAX);
4075 return (PCAP_ERROR);
4079 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
4080 errno, "The number of bytes to be injected must not be zero");
4081 return (PCAP_ERROR);
4084 return (p->inject_op(p, buf, (int)size));
4088 pcap_close(pcap_t *p)
4095 * Helpers for safely loading code at run time.
4096 * Currently Windows-only.
4100 // This wrapper around loadlibrary appends the system folder (usually
4101 // C:\Windows\System32) to the relative path of the DLL, so that the DLL
4102 // is always loaded from an absolute path (it's no longer possible to
4103 // load modules from the application folder).
4104 // This solves the DLL Hijacking issue discovered in August 2010:
4106 // https://blog.rapid7.com/2010/08/23/exploiting-dll-hijacking-flaws/
4107 // https://blog.rapid7.com/2010/08/23/application-dll-load-hijacking/
4108 // (the purported Rapid7 blog post link in the first of those two links
4109 // is broken; the second of those links works.)
4111 // If any links there are broken from all the content shuffling Rapid&
4112 // did, see archived versions of the posts at their original homes, at
4114 // https://web.archive.org/web/20110122175058/http://blog.metasploit.com/2010/08/exploiting-dll-hijacking-flaws.html
4115 // https://web.archive.org/web/20100828112111/http://blog.rapid7.com/?p=5325
4118 pcap_load_code(const char *name)
4121 * XXX - should this work in UTF-16LE rather than in the local
4124 CHAR path[MAX_PATH];
4125 CHAR fullFileName[MAX_PATH];
4127 HMODULE hModule = NULL;
4131 res = GetSystemDirectoryA(path, MAX_PATH);
4135 // some bad failure occurred;
4140 if (res > MAX_PATH) {
4142 // the buffer was not big enough
4144 SetLastError(ERROR_INSUFFICIENT_BUFFER);
4148 if (res + 1 + strlen(name) + 1 < MAX_PATH) {
4149 memcpy(fullFileName, path, res * sizeof(TCHAR));
4150 fullFileName[res] = '\\';
4151 memcpy(&fullFileName[res + 1], name, (strlen(name) + 1) * sizeof(TCHAR));
4153 hModule = LoadLibraryA(fullFileName);
4155 SetLastError(ERROR_INSUFFICIENT_BUFFER);
4163 pcap_find_function(pcap_code_handle_t code, const char *func)
4165 return (GetProcAddress(code, func));
4170 * Given a BPF program, a pcap_pkthdr structure for a packet, and the raw
4171 * data for the packet, check whether the packet passes the filter.
4172 * Returns the return value of the filter program, which will be zero if
4173 * the packet doesn't pass and non-zero if the packet does pass.
4176 pcap_offline_filter(const struct bpf_program *fp, const struct pcap_pkthdr *h,
4179 const struct bpf_insn *fcode = fp->bf_insns;
4182 return (pcap_filter(fcode, pkt, h->len, h->caplen));
4188 pcap_can_set_rfmon_dead(pcap_t *p)
4190 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4191 "Rfmon mode doesn't apply on a pcap_open_dead pcap_t");
4192 return (PCAP_ERROR);
4196 pcap_read_dead(pcap_t *p, int cnt _U_, pcap_handler callback _U_,
4199 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4200 "Packets aren't available from a pcap_open_dead pcap_t");
4205 pcap_breakloop_dead(pcap_t *p _U_)
4208 * A "dead" pcap_t is just a placeholder to use in order to
4209 * compile a filter to BPF code or to open a savefile for
4210 * writing. It doesn't support any operations, including
4211 * capturing or reading packets, so there will never be a
4212 * get-packets loop in progress to break out *of*.
4214 * As such, this routine doesn't need to do anything.
4219 pcap_inject_dead(pcap_t *p, const void *buf _U_, int size _U_)
4221 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4222 "Packets can't be sent on a pcap_open_dead pcap_t");
4227 pcap_setfilter_dead(pcap_t *p, struct bpf_program *fp _U_)
4229 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4230 "A filter cannot be set on a pcap_open_dead pcap_t");
4235 pcap_setdirection_dead(pcap_t *p, pcap_direction_t d _U_)
4237 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4238 "The packet direction cannot be set on a pcap_open_dead pcap_t");
4243 pcap_set_datalink_dead(pcap_t *p, int dlt _U_)
4245 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4246 "The link-layer header type cannot be set on a pcap_open_dead pcap_t");
4251 pcap_getnonblock_dead(pcap_t *p)
4253 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4254 "A pcap_open_dead pcap_t does not have a non-blocking mode setting");
4259 pcap_setnonblock_dead(pcap_t *p, int nonblock _U_)
4261 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4262 "A pcap_open_dead pcap_t does not have a non-blocking mode setting");
4267 pcap_stats_dead(pcap_t *p, struct pcap_stat *ps _U_)
4269 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4270 "Statistics aren't available from a pcap_open_dead pcap_t");
4275 static struct pcap_stat *
4276 pcap_stats_ex_dead(pcap_t *p, int *pcap_stat_size _U_)
4278 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4279 "Statistics aren't available from a pcap_open_dead pcap_t");
4284 pcap_setbuff_dead(pcap_t *p, int dim _U_)
4286 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4287 "The kernel buffer size cannot be set on a pcap_open_dead pcap_t");
4292 pcap_setmode_dead(pcap_t *p, int mode _U_)
4294 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4295 "impossible to set mode on a pcap_open_dead pcap_t");
4300 pcap_setmintocopy_dead(pcap_t *p, int size _U_)
4302 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4303 "The mintocopy parameter cannot be set on a pcap_open_dead pcap_t");
4308 pcap_getevent_dead(pcap_t *p)
4310 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4311 "A pcap_open_dead pcap_t has no event handle");
4312 return (INVALID_HANDLE_VALUE);
4316 pcap_oid_get_request_dead(pcap_t *p, bpf_u_int32 oid _U_, void *data _U_,
4319 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4320 "An OID get request cannot be performed on a pcap_open_dead pcap_t");
4321 return (PCAP_ERROR);
4325 pcap_oid_set_request_dead(pcap_t *p, bpf_u_int32 oid _U_, const void *data _U_,
4328 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4329 "An OID set request cannot be performed on a pcap_open_dead pcap_t");
4330 return (PCAP_ERROR);
4334 pcap_sendqueue_transmit_dead(pcap_t *p, pcap_send_queue *queue _U_,
4337 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4338 "Packets cannot be transmitted on a pcap_open_dead pcap_t");
4343 pcap_setuserbuffer_dead(pcap_t *p, int size _U_)
4345 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4346 "The user buffer cannot be set on a pcap_open_dead pcap_t");
4351 pcap_live_dump_dead(pcap_t *p, char *filename _U_, int maxsize _U_,
4354 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4355 "Live packet dumping cannot be performed on a pcap_open_dead pcap_t");
4360 pcap_live_dump_ended_dead(pcap_t *p, int sync _U_)
4362 snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
4363 "Live packet dumping cannot be performed on a pcap_open_dead pcap_t");
4367 static PAirpcapHandle
4368 pcap_get_airpcap_handle_dead(pcap_t *p _U_)
4375 pcap_cleanup_dead(pcap_t *p _U_)
4377 /* Nothing to do. */
4381 pcap_open_dead_with_tstamp_precision(int linktype, int snaplen, u_int precision)
4385 switch (precision) {
4387 case PCAP_TSTAMP_PRECISION_MICRO:
4388 case PCAP_TSTAMP_PRECISION_NANO:
4393 * This doesn't really matter, but we don't have any way
4394 * to report particular errors, so the only failure we
4395 * should have is a memory allocation failure. Just
4396 * pick microsecond precision.
4398 precision = PCAP_TSTAMP_PRECISION_MICRO;
4401 p = malloc(sizeof(*p));
4404 memset (p, 0, sizeof(*p));
4405 p->snapshot = snaplen;
4406 p->linktype = linktype;
4407 p->opt.tstamp_precision = precision;
4408 p->can_set_rfmon_op = pcap_can_set_rfmon_dead;
4409 p->read_op = pcap_read_dead;
4410 p->inject_op = pcap_inject_dead;
4411 p->setfilter_op = pcap_setfilter_dead;
4412 p->setdirection_op = pcap_setdirection_dead;
4413 p->set_datalink_op = pcap_set_datalink_dead;
4414 p->getnonblock_op = pcap_getnonblock_dead;
4415 p->setnonblock_op = pcap_setnonblock_dead;
4416 p->stats_op = pcap_stats_dead;
4418 p->stats_ex_op = pcap_stats_ex_dead;
4419 p->setbuff_op = pcap_setbuff_dead;
4420 p->setmode_op = pcap_setmode_dead;
4421 p->setmintocopy_op = pcap_setmintocopy_dead;
4422 p->getevent_op = pcap_getevent_dead;
4423 p->oid_get_request_op = pcap_oid_get_request_dead;
4424 p->oid_set_request_op = pcap_oid_set_request_dead;
4425 p->sendqueue_transmit_op = pcap_sendqueue_transmit_dead;
4426 p->setuserbuffer_op = pcap_setuserbuffer_dead;
4427 p->live_dump_op = pcap_live_dump_dead;
4428 p->live_dump_ended_op = pcap_live_dump_ended_dead;
4429 p->get_airpcap_handle_op = pcap_get_airpcap_handle_dead;
4431 p->breakloop_op = pcap_breakloop_dead;
4432 p->cleanup_op = pcap_cleanup_dead;
4435 * A "dead" pcap_t never requires special BPF code generation.
4437 p->bpf_codegen_flags = 0;
4444 pcap_open_dead(int linktype, int snaplen)
4446 return (pcap_open_dead_with_tstamp_precision(linktype, snaplen,
4447 PCAP_TSTAMP_PRECISION_MICRO));
4452 * Set the internal "debug printout" flag for the filter expression parser.
4453 * The code to print that stuff is present only if YYDEBUG is defined, so
4454 * the flag, and the routine to set it, are defined only if YYDEBUG is
4457 * This is intended for libpcap developers, not for general use.
4458 * If you want to set these in a program, you'll have to declare this
4459 * routine yourself, with the appropriate DLL import attribute on Windows;
4460 * it's not declared in any header file, and won't be declared in any
4461 * header file provided by libpcap.
4463 PCAP_API void pcap_set_parser_debug(int value);
4466 pcap_set_parser_debug(int value)