2 * Edit capture files. We can delete packets, adjust timestamps, or
3 * simply convert from one format to another format.
5 * Originally written by Richard Sharpe.
6 * Improved by Guy Harris.
7 * Further improved by Richard Sharpe.
9 * Copyright 2013, Richard Sharpe <realrichardsharpe[AT]gmail.com>
11 * Wireshark - Network traffic analyzer
12 * By Gerald Combs <gerald@wireshark.org>
13 * Copyright 1998 Gerald Combs
15 * SPDX-License-Identifier: GPL-2.0-or-later
26 * Just make sure we include the prototype for strptime as well
27 * (needed for glibc 2.2) but make sure we do this only if not
46 #include <wiretap/secrets-types.h>
47 #include <wiretap/wtap.h>
49 #include "epan/etypes.h"
50 #include "epan/dissectors/packet-ieee80211-radiotap-defs.h"
52 #ifndef HAVE_GETOPT_LONG
53 #include "wsutil/wsgetopt.h"
57 #include <process.h> /* getpid */
62 # include "wsutil/strptime.h"
65 #include <ui/clopts_common.h>
66 #include <ui/cmdarg_err.h>
67 #include <wsutil/filesystem.h>
68 #include <wsutil/file_util.h>
69 #include <wsutil/wsgcrypt.h>
70 #include <wsutil/plugins.h>
71 #include <wsutil/privileges.h>
72 #include <wsutil/report_message.h>
73 #include <wsutil/strnatcmp.h>
74 #include <wsutil/str_util.h>
76 #include <version_info.h>
77 #include <wsutil/pint.h>
78 #include <wsutil/strtoi.h>
79 #include <wiretap/wtap_opttypes.h>
80 #include <wiretap/pcapng.h>
82 #include "ui/failure_message.h"
84 #include "ringbuffer.h" /* For RINGBUFFER_MAX_NUM_FILES */
86 #define INVALID_OPTION 1
87 #define INVALID_FILE 2
88 #define CANT_EXTRACT_PREFIX 2
93 * Some globals so we can pass things to various routines
102 * Duplicate frame detection
104 typedef struct _fd_hash_t {
110 #define DEFAULT_DUP_DEPTH 5 /* Used with -d */
111 #define MAX_DUP_DEPTH 1000000 /* the maximum window (and actual size of fd_hash[]) for de-duplication */
113 static fd_hash_t fd_hash[MAX_DUP_DEPTH];
114 static int dup_window = DEFAULT_DUP_DEPTH;
115 static int cur_dup_entry = 0;
117 static guint32 ignored_bytes = 0; /* Used with -I */
119 #define ONE_BILLION 1000000000
121 /* Weights of different errors we can introduce */
122 /* We should probably make these command-line arguments */
123 /* XXX - Should we add a bit-level error? */
124 #define ERR_WT_BIT 5 /* Flip a random bit */
125 #define ERR_WT_BYTE 5 /* Substitute a random byte */
126 #define ERR_WT_ALNUM 5 /* Substitute a random character in [A-Za-z0-9] */
127 #define ERR_WT_FMT 2 /* Substitute "%s" */
128 #define ERR_WT_AA 1 /* Fill the remainder of the buffer with 0xAA */
129 #define ERR_WT_TOTAL (ERR_WT_BIT + ERR_WT_BYTE + ERR_WT_ALNUM + ERR_WT_FMT + ERR_WT_AA)
131 #define ALNUM_CHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
132 #define ALNUM_LEN (sizeof(ALNUM_CHARS) - 1)
134 struct time_adjustment {
139 typedef struct _chop_t {
149 /* Table of user comments */
150 GTree *frames_user_comments = NULL;
152 #define MAX_SELECTIONS 512
153 static struct select_item selectfrm[MAX_SELECTIONS];
154 static guint max_selected = 0;
155 static int keep_em = 0;
156 #ifdef PCAP_NG_DEFAULT
157 static int out_file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_PCAPNG; /* default to pcapng */
159 static int out_file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_PCAP; /* default to pcap */
161 static int out_frame_type = -2; /* Leave frame type alone */
162 static int verbose = 0; /* Not so verbose */
163 static struct time_adjustment time_adj = {NSTIME_INIT_ZERO, 0}; /* no adjustment */
164 static nstime_t relative_time_window = NSTIME_INIT_ZERO; /* de-dup time window */
165 static double err_prob = -1.0;
166 static time_t starttime = 0;
167 static time_t stoptime = 0;
168 static gboolean check_startstop = FALSE;
169 static gboolean rem_vlan = FALSE;
170 static gboolean dup_detect = FALSE;
171 static gboolean dup_detect_by_time = FALSE;
172 static gboolean skip_radiotap = FALSE;
174 static int do_strict_time_adjustment = FALSE;
175 static struct time_adjustment strict_time_adj = {NSTIME_INIT_ZERO, 0}; /* strict time adjustment */
176 static nstime_t previous_time = NSTIME_INIT_ZERO; /* previous time */
178 static const struct {
181 } secrets_types[] = {
182 { "tls", SECRETS_TYPE_TLS },
185 static int find_dct2000_real_data(guint8 *buf);
186 static void handle_chopping(chop_t chop, wtap_packet_header *out_phdr,
187 const wtap_packet_header *in_phdr, guint8 **buf,
191 abs_time_to_str_with_sec_resolution(const nstime_t *abs_time)
194 gchar *buf = (gchar *)g_malloc(16);
196 tmp = localtime(&abs_time->secs);
199 g_snprintf(buf, 16, "%d%02d%02d%02d%02d%02d",
214 fileset_get_filename_by_pattern(guint idx, const wtap_rec *rec,
215 gchar *fprefix, gchar *fsuffix)
221 g_snprintf(filenum, sizeof(filenum), "%05u", idx % RINGBUFFER_MAX_NUM_FILES);
222 if (rec->presence_flags & WTAP_HAS_TS) {
223 timestr = abs_time_to_str_with_sec_resolution(&rec->ts);
224 abs_str = g_strconcat(fprefix, "_", filenum, "_", timestr, fsuffix, NULL);
227 abs_str = g_strconcat(fprefix, "_", filenum, fsuffix, NULL);
233 fileset_extract_prefix_suffix(const char *fname, gchar **fprefix, gchar **fsuffix)
235 char *pfx, *last_pathsep;
238 save_file = g_strdup(fname);
239 if (save_file == NULL) {
240 fprintf(stderr, "editcap: Out of memory\n");
244 last_pathsep = strrchr(save_file, G_DIR_SEPARATOR);
245 pfx = strrchr(save_file,'.');
246 if (pfx != NULL && (last_pathsep == NULL || pfx > last_pathsep)) {
247 /* The pathname has a "." in it, and it's in the last component
248 * of the pathname (because there is either only one component,
249 * i.e. last_pathsep is null as there are no path separators,
250 * or the "." is after the path separator before the last
253 * Treat it as a separator between the rest of the file name and
254 * the file name suffix, and arrange that the names given to the
255 * ring buffer files have the specified suffix, i.e. put the
256 * changing part of the name *before* the suffix. */
258 *fprefix = g_strdup(save_file);
259 pfx[0] = '.'; /* restore capfile_name */
260 *fsuffix = g_strdup(pfx);
262 /* Either there's no "." in the pathname, or it's in a directory
263 * component, so the last component has no suffix. */
264 *fprefix = g_strdup(save_file);
271 /* Add a selection item, a simple parser for now */
273 add_selection(char *sel, guint* max_selection)
278 if (max_selected >= MAX_SELECTIONS) {
279 /* Let the user know we stopped selecting */
280 fprintf(stderr, "Out of room for packet selections.\n");
285 fprintf(stderr, "Add_Selected: %s\n", sel);
287 if ((locn = strchr(sel, '-')) == NULL) { /* No dash, so a single number? */
289 fprintf(stderr, "Not inclusive ...");
291 selectfrm[max_selected].inclusive = FALSE;
292 selectfrm[max_selected].first = get_guint32(sel, "packet number");
293 if (selectfrm[max_selected].first > *max_selection)
294 *max_selection = selectfrm[max_selected].first;
297 fprintf(stderr, " %u\n", selectfrm[max_selected].first);
300 fprintf(stderr, "Inclusive ...");
302 *locn = '\0'; /* split the range */
304 selectfrm[max_selected].inclusive = TRUE;
305 selectfrm[max_selected].first = get_guint32(sel, "beginning of packet range");
306 selectfrm[max_selected].second = get_guint32(next, "end of packet range");
308 if (selectfrm[max_selected].second == 0)
310 /* Not a valid number, presume all */
311 selectfrm[max_selected].second = *max_selection = G_MAXUINT;
313 else if (selectfrm[max_selected].second > *max_selection)
314 *max_selection = selectfrm[max_selected].second;
317 fprintf(stderr, " %u, %u\n", selectfrm[max_selected].first,
318 selectfrm[max_selected].second);
325 /* Was the packet selected? */
328 selected(guint recno)
332 for (i = 0; i < max_selected; i++) {
333 if (selectfrm[i].inclusive) {
334 if (selectfrm[i].first <= recno && selectfrm[i].second >= recno)
337 if (recno == selectfrm[i].first)
346 set_time_adjustment(char *optarg_str_p)
355 /* skip leading whitespace */
356 while (*optarg_str_p == ' ' || *optarg_str_p == '\t')
359 /* check for a negative adjustment */
360 if (*optarg_str_p == '-') {
361 time_adj.is_negative = 1;
365 /* collect whole number of seconds, if any */
366 if (*optarg_str_p == '.') { /* only fractional (i.e., .5 is ok) */
370 val = strtol(optarg_str_p, &frac, 10);
371 if (frac == NULL || frac == optarg_str_p
372 || val == LONG_MIN || val == LONG_MAX) {
373 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
377 if (val < 0) { /* implies '--' since we caught '-' above */
378 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
383 time_adj.tv.secs = val;
385 /* now collect the partial seconds, if any */
386 if (*frac != '\0') { /* chars left, so get fractional part */
387 val = strtol(&(frac[1]), &end, 10);
388 /* if more than 9 fractional digits truncate to 9 */
389 if ((end - &(frac[1])) > 9) {
390 frac[10] = 't'; /* 't' for truncate */
391 val = strtol(&(frac[1]), &end, 10);
393 if (*frac != '.' || end == NULL || end == frac || val < 0
394 || val >= ONE_BILLION || val == LONG_MIN || val == LONG_MAX) {
395 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
400 return TRUE; /* no fractional digits */
403 /* adjust fractional portion from fractional to numerator
404 * e.g., in "1.5" from 5 to 500000000 since .5*10^9 = 500000000 */
405 frac_digits = end - frac - 1; /* fractional digit count (remember '.') */
406 while(frac_digits < 9) { /* this is frac of 10^9 */
411 time_adj.tv.nsecs = (int)val;
416 set_strict_time_adj(char *optarg_str_p)
425 /* skip leading whitespace */
426 while (*optarg_str_p == ' ' || *optarg_str_p == '\t')
430 * check for a negative adjustment
431 * A negative strict adjustment value is a flag
432 * to adjust all frames by the specifed delta time.
434 if (*optarg_str_p == '-') {
435 strict_time_adj.is_negative = 1;
439 /* collect whole number of seconds, if any */
440 if (*optarg_str_p == '.') { /* only fractional (i.e., .5 is ok) */
444 val = strtol(optarg_str_p, &frac, 10);
445 if (frac == NULL || frac == optarg_str_p
446 || val == LONG_MIN || val == LONG_MAX) {
447 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
451 if (val < 0) { /* implies '--' since we caught '-' above */
452 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
457 strict_time_adj.tv.secs = val;
459 /* now collect the partial seconds, if any */
460 if (*frac != '\0') { /* chars left, so get fractional part */
461 val = strtol(&(frac[1]), &end, 10);
462 /* if more than 9 fractional digits truncate to 9 */
463 if ((end - &(frac[1])) > 9) {
464 frac[10] = 't'; /* 't' for truncate */
465 val = strtol(&(frac[1]), &end, 10);
467 if (*frac != '.' || end == NULL || end == frac || val < 0
468 || val >= ONE_BILLION || val == LONG_MIN || val == LONG_MAX) {
469 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
474 return TRUE; /* no fractional digits */
477 /* adjust fractional portion from fractional to numerator
478 * e.g., in "1.5" from 5 to 500000000 since .5*10^9 = 500000000 */
479 frac_digits = end - frac - 1; /* fractional digit count (remember '.') */
480 while(frac_digits < 9) { /* this is frac of 10^9 */
485 strict_time_adj.tv.nsecs = (int)val;
490 set_rel_time(char *optarg_str_p)
499 /* skip leading whitespace */
500 while (*optarg_str_p == ' ' || *optarg_str_p == '\t')
503 /* ignore negative adjustment */
504 if (*optarg_str_p == '-')
507 /* collect whole number of seconds, if any */
508 if (*optarg_str_p == '.') { /* only fractional (i.e., .5 is ok) */
512 val = strtol(optarg_str_p, &frac, 10);
513 if (frac == NULL || frac == optarg_str_p
514 || val == LONG_MIN || val == LONG_MAX) {
515 fprintf(stderr, "1: editcap: \"%s\" isn't a valid rel time value\n",
519 if (val < 0) { /* implies '--' since we caught '-' above */
520 fprintf(stderr, "2: editcap: \"%s\" isn't a valid rel time value\n",
525 relative_time_window.secs = val;
527 /* now collect the partial seconds, if any */
528 if (*frac != '\0') { /* chars left, so get fractional part */
529 val = strtol(&(frac[1]), &end, 10);
530 /* if more than 9 fractional digits truncate to 9 */
531 if ((end - &(frac[1])) > 9) {
532 frac[10] = 't'; /* 't' for truncate */
533 val = strtol(&(frac[1]), &end, 10);
535 if (*frac != '.' || end == NULL || end == frac || val < 0
536 || val >= ONE_BILLION || val == LONG_MIN || val == LONG_MAX) {
537 fprintf(stderr, "3: editcap: \"%s\" isn't a valid rel time value\n",
542 return TRUE; /* no fractional digits */
545 /* adjust fractional portion from fractional to numerator
546 * e.g., in "1.5" from 5 to 500000000 since .5*10^9 = 500000000 */
547 frac_digits = end - frac - 1; /* fractional digit count (remember '.') */
548 while(frac_digits < 9) { /* this is frac of 10^9 */
553 relative_time_window.nsecs = (int)val;
557 #define LINUX_SLL_OFFSETP 14
560 sll_remove_vlan_info(guint8* fd, guint32* len) {
561 if (pntoh16(fd + LINUX_SLL_OFFSETP) == ETHERTYPE_VLAN) {
563 /* point to start of vlan */
564 fd = fd + LINUX_SLL_OFFSETP;
565 /* bytes to read after vlan info */
566 rest_len = *len - (LINUX_SLL_OFFSETP + VLAN_SIZE);
567 /* remove vlan info from packet */
568 memmove(fd, fd + VLAN_SIZE, rest_len);
574 remove_vlan_info(const wtap_packet_header *phdr, guint8* fd, guint32* len) {
575 switch (phdr->pkt_encap) {
577 sll_remove_vlan_info(fd, len);
580 /* no support for current pkt_encap */
586 is_duplicate(guint8* fd, guint32 len) {
588 const struct ieee80211_radiotap_header* tap_header;
590 /*Hint to ignore some bytes at the start of the frame for the digest calculation(-I option) */
591 guint32 offset = ignored_bytes;
595 if (len <= ignored_bytes) {
599 /* Get the size of radiotap header and use that as offset (-p option) */
600 if (skip_radiotap == TRUE) {
601 tap_header = (const struct ieee80211_radiotap_header*)fd;
602 offset = pletoh16(&tap_header->it_len);
607 new_fd = &fd[offset];
608 new_len = len - (offset);
611 if (cur_dup_entry >= dup_window)
614 /* Calculate our digest */
615 gcry_md_hash_buffer(GCRY_MD_MD5, fd_hash[cur_dup_entry].digest, new_fd, new_len);
617 fd_hash[cur_dup_entry].len = len;
619 /* Look for duplicates */
620 for (i = 0; i < dup_window; i++) {
621 if (i == cur_dup_entry)
624 if (fd_hash[i].len == fd_hash[cur_dup_entry].len
625 && memcmp(fd_hash[i].digest, fd_hash[cur_dup_entry].digest, 16) == 0) {
634 is_duplicate_rel_time(guint8* fd, guint32 len, const nstime_t *current) {
637 /*Hint to ignore some bytes at the start of the frame for the digest calculation(-I option) */
638 guint32 offset = ignored_bytes;
642 if (len <= ignored_bytes) {
646 new_fd = &fd[offset];
647 new_len = len - (offset);
650 if (cur_dup_entry >= dup_window)
653 /* Calculate our digest */
654 gcry_md_hash_buffer(GCRY_MD_MD5, fd_hash[cur_dup_entry].digest, new_fd, new_len);
656 fd_hash[cur_dup_entry].len = len;
657 fd_hash[cur_dup_entry].frame_time.secs = current->secs;
658 fd_hash[cur_dup_entry].frame_time.nsecs = current->nsecs;
661 * Look for relative time related duplicates.
662 * This is hopefully a reasonably efficient mechanism for
663 * finding duplicates by rel time in the fd_hash[] cache.
664 * We check starting from the most recently added hash
665 * entries and work backwards towards older packets.
666 * This approach allows the dup test to be terminated
667 * when the relative time of a cached entry is found to
668 * be beyond the dup time window.
670 * Of course this assumes that the input trace file is
671 * "well-formed" in the sense that the packet timestamps are
672 * in strict chronologically increasing order (which is NOT
673 * always the case!!).
675 * The fd_hash[] table was deliberately created large (1,000,000).
676 * Looking for time related duplicates in large trace files with
677 * non-fractional dup time window values can potentially take
678 * a long time to complete.
681 for (i = cur_dup_entry - 1;; i--) {
688 if (i == cur_dup_entry) {
690 * We've decremented back to where we started.
696 if (nstime_is_unset(&(fd_hash[i].frame_time))) {
698 * We've decremented to an unused fd_hash[] entry.
704 nstime_delta(&delta, current, &fd_hash[i].frame_time);
706 if (delta.secs < 0 || delta.nsecs < 0) {
708 * A negative delta implies that the current packet
709 * has an absolute timestamp less than the cached packet
710 * that it is being compared to. This is NOT a normal
711 * situation since trace files usually have packets in
712 * chronological order (oldest to newest).
714 * There are several possible ways to deal with this:
715 * 1. 'continue' dup checking with the next cached frame.
716 * 2. 'break' from looking for a duplicate of the current frame.
717 * 3. Take the absolute value of the delta and see if that
718 * falls within the specifed dup time window.
720 * Currently this code does option 1. But it would pretty
721 * easy to add yet-another-editcap-option to select one of
722 * the other behaviors for dealing with out-of-sequence
728 cmp = nstime_cmp(&delta, &relative_time_window);
732 * The delta time indicates that we are now looking at
733 * cached packets beyond the specified dup time window.
737 } else if (fd_hash[i].len == fd_hash[cur_dup_entry].len
738 && memcmp(fd_hash[i].digest, fd_hash[cur_dup_entry].digest, 16) == 0) {
747 print_usage(FILE *output)
749 fprintf(output, "\n");
750 fprintf(output, "Usage: editcap [options] ... <infile> <outfile> [ <packet#>[-<packet#>] ... ]\n");
751 fprintf(output, "\n");
752 fprintf(output, "<infile> and <outfile> must both be present.\n");
753 fprintf(output, "A single packet or a range of packets can be selected.\n");
754 fprintf(output, "\n");
755 fprintf(output, "Packet selection:\n");
756 fprintf(output, " -r keep the selected packets; default is to delete them.\n");
757 fprintf(output, " -A <start time> only output packets whose timestamp is after (or equal\n");
758 fprintf(output, " to) the given time (format as YYYY-MM-DD hh:mm:ss).\n");
759 fprintf(output, " -B <stop time> only output packets whose timestamp is before the\n");
760 fprintf(output, " given time (format as YYYY-MM-DD hh:mm:ss).\n");
761 fprintf(output, "\n");
762 fprintf(output, "Duplicate packet removal:\n");
763 fprintf(output, " --novlan remove vlan info from packets before checking for duplicates.\n");
764 fprintf(output, " -d remove packet if duplicate (window == %d).\n", DEFAULT_DUP_DEPTH);
765 fprintf(output, " -D <dup window> remove packet if duplicate; configurable <dup window>.\n");
766 fprintf(output, " Valid <dup window> values are 0 to %d.\n", MAX_DUP_DEPTH);
767 fprintf(output, " NOTE: A <dup window> of 0 with -v (verbose option) is\n");
768 fprintf(output, " useful to print MD5 hashes.\n");
769 fprintf(output, " -w <dup time window> remove packet if duplicate packet is found EQUAL TO OR\n");
770 fprintf(output, " LESS THAN <dup time window> prior to current packet.\n");
771 fprintf(output, " A <dup time window> is specified in relative seconds\n");
772 fprintf(output, " (e.g. 0.000001).\n");
773 fprintf(output, " NOTE: The use of the 'Duplicate packet removal' options with\n");
774 fprintf(output, " other editcap options except -v may not always work as expected.\n");
775 fprintf(output, " Specifically the -r, -t or -S options will very likely NOT have the\n");
776 fprintf(output, " desired effect if combined with the -d, -D or -w.\n");
777 fprintf(output, " --skip-radiotap-header skip radiotap header when checking for packet duplicates.\n");
778 fprintf(output, " Useful when processing packets captured by multiple radios\n");
779 fprintf(output, " on the same channel in the vicinity of each other.\n");
780 fprintf(output, "\n");
781 fprintf(output, "Packet manipulation:\n");
782 fprintf(output, " -s <snaplen> truncate each packet to max. <snaplen> bytes of data.\n");
783 fprintf(output, " -C [offset:]<choplen> chop each packet by <choplen> bytes. Positive values\n");
784 fprintf(output, " chop at the packet beginning, negative values at the\n");
785 fprintf(output, " packet end. If an optional offset precedes the length,\n");
786 fprintf(output, " then the bytes chopped will be offset from that value.\n");
787 fprintf(output, " Positive offsets are from the packet beginning,\n");
788 fprintf(output, " negative offsets are from the packet end. You can use\n");
789 fprintf(output, " this option more than once, allowing up to 2 chopping\n");
790 fprintf(output, " regions within a packet provided that at least 1\n");
791 fprintf(output, " choplen is positive and at least 1 is negative.\n");
792 fprintf(output, " -L adjust the frame (i.e. reported) length when chopping\n");
793 fprintf(output, " and/or snapping.\n");
794 fprintf(output, " -t <time adjustment> adjust the timestamp of each packet.\n");
795 fprintf(output, " <time adjustment> is in relative seconds (e.g. -0.5).\n");
796 fprintf(output, " -S <strict adjustment> adjust timestamp of packets if necessary to ensure\n");
797 fprintf(output, " strict chronological increasing order. The <strict\n");
798 fprintf(output, " adjustment> is specified in relative seconds with\n");
799 fprintf(output, " values of 0 or 0.000001 being the most reasonable.\n");
800 fprintf(output, " A negative adjustment value will modify timestamps so\n");
801 fprintf(output, " that each packet's delta time is the absolute value\n");
802 fprintf(output, " of the adjustment specified. A value of -0 will set\n");
803 fprintf(output, " all packets to the timestamp of the first packet.\n");
804 fprintf(output, " -E <error probability> set the probability (between 0.0 and 1.0 incl.) that\n");
805 fprintf(output, " a particular packet byte will be randomly changed.\n");
806 fprintf(output, " -o <change offset> When used in conjunction with -E, skip some bytes from the\n");
807 fprintf(output, " beginning of the packet. This allows one to preserve some\n");
808 fprintf(output, " bytes, in order to have some headers untouched.\n");
809 fprintf(output, " --seed <seed> When used in conjunction with -E, set the seed to use for\n");
810 fprintf(output, " the pseudo-random number generator. This allows one to\n");
811 fprintf(output, " repeat a particular sequence of errors.\n");
812 fprintf(output, " -I <bytes to ignore> ignore the specified number of bytes at the beginning\n");
813 fprintf(output, " of the frame during MD5 hash calculation, unless the\n");
814 fprintf(output, " frame is too short, then the full frame is used.\n");
815 fprintf(output, " Useful to remove duplicated packets taken on\n");
816 fprintf(output, " several routers (different mac addresses for\n");
817 fprintf(output, " example).\n");
818 fprintf(output, " e.g. -I 26 in case of Ether/IP will ignore\n");
819 fprintf(output, " ether(14) and IP header(20 - 4(src ip) - 4(dst ip)).\n");
820 fprintf(output, " -a <framenum>:<comment> Add or replace comment for given frame number\n");
821 fprintf(output, "\n");
822 fprintf(output, "Output File(s):\n");
823 fprintf(output, " -c <packets per file> split the packet output to different files based on\n");
824 fprintf(output, " uniform packet counts with a maximum of\n");
825 fprintf(output, " <packets per file> each.\n");
826 fprintf(output, " -i <seconds per file> split the packet output to different files based on\n");
827 fprintf(output, " uniform time intervals with a maximum of\n");
828 fprintf(output, " <seconds per file> each.\n");
829 #ifdef PCAP_NG_DEFAULT
830 fprintf(output, " -F <capture type> set the output file type; default is pcapng.\n");
832 fprintf(output, " -F <capture type> set the output file type; default is pcap.\n");
834 fprintf(output, " An empty \"-F\" option will list the file types.\n");
835 fprintf(output, " -T <encap type> set the output file encapsulation type; default is the\n");
836 fprintf(output, " same as the input file. An empty \"-T\" option will\n");
837 fprintf(output, " list the encapsulation types.\n");
838 fprintf(output, "\n");
839 fprintf(output, "Miscellaneous:\n");
840 fprintf(output, " -h display this help and exit.\n");
841 fprintf(output, " -v verbose output.\n");
842 fprintf(output, " If -v is used with any of the 'Duplicate Packet\n");
843 fprintf(output, " Removal' options (-d, -D or -w) then Packet lengths\n");
844 fprintf(output, " and MD5 hashes are printed to standard-error.\n");
848 const char *sstr; /* The short string */
849 const char *lstr; /* The long string */
853 string_compare(gconstpointer a, gconstpointer b)
855 return strcmp(((const struct string_elem *)a)->sstr,
856 ((const struct string_elem *)b)->sstr);
860 string_nat_compare(gconstpointer a, gconstpointer b)
862 return ws_ascii_strnatcmp(((const struct string_elem *)a)->sstr,
863 ((const struct string_elem *)b)->sstr);
867 string_elem_print(gpointer data, gpointer stream_ptr)
869 fprintf((FILE *) stream_ptr, " %s - %s\n",
870 ((struct string_elem *)data)->sstr,
871 ((struct string_elem *)data)->lstr);
875 list_capture_types(FILE *stream) {
877 struct string_elem *captypes;
880 captypes = g_new(struct string_elem,WTAP_NUM_FILE_TYPES_SUBTYPES);
881 fprintf(stream, "editcap: The available capture file types for the \"-F\" flag are:\n");
882 for (i = 0; i < WTAP_NUM_FILE_TYPES_SUBTYPES; i++) {
883 if (wtap_dump_can_open(i)) {
884 captypes[i].sstr = wtap_file_type_subtype_short_string(i);
885 captypes[i].lstr = wtap_file_type_subtype_string(i);
886 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
889 g_slist_foreach(list, string_elem_print, stream);
895 list_encap_types(FILE *stream) {
897 struct string_elem *encaps;
900 encaps = (struct string_elem *)g_malloc(sizeof(struct string_elem) * WTAP_NUM_ENCAP_TYPES);
901 fprintf(stream, "editcap: The available encapsulation types for the \"-T\" flag are:\n");
902 for (i = 0; i < WTAP_NUM_ENCAP_TYPES; i++) {
903 encaps[i].sstr = wtap_encap_short_string(i);
904 if (encaps[i].sstr != NULL) {
905 encaps[i].lstr = wtap_encap_string(i);
906 list = g_slist_insert_sorted(list, &encaps[i], string_nat_compare);
909 g_slist_foreach(list, string_elem_print, stream);
915 list_secrets_types(FILE *stream)
917 for (guint i = 0; i < G_N_ELEMENTS(secrets_types); i++) {
918 fprintf(stream, " %s\n", secrets_types[i].str);
923 lookup_secrets_type(const char *type)
925 for (guint i = 0; i < G_N_ELEMENTS(secrets_types); i++) {
926 if (!strcmp(secrets_types[i].str, type)) {
927 return secrets_types[i].id;
934 framenum_compare(gconstpointer a, gconstpointer b, gpointer user_data _U_)
936 if (GPOINTER_TO_UINT(a) < GPOINTER_TO_UINT(b))
939 if (GPOINTER_TO_UINT(a) > GPOINTER_TO_UINT(b))
946 * General errors and warnings are reported with an console message
950 failure_warning_message(const char *msg_format, va_list ap)
952 fprintf(stderr, "editcap: ");
953 vfprintf(stderr, msg_format, ap);
954 fprintf(stderr, "\n");
958 * Report additional information for an error in command-line arguments.
961 failure_message_cont(const char *msg_format, va_list ap)
963 vfprintf(stderr, msg_format, ap);
964 fprintf(stderr, "\n");
968 editcap_dump_open(const char *filename, const wtap_dump_params *params,
973 if (strcmp(filename, "-") == 0) {
974 /* Write to the standard output. */
975 pdh = wtap_dump_open_stdout(out_file_type_subtype, WTAP_UNCOMPRESSED,
978 pdh = wtap_dump_open(filename, out_file_type_subtype, WTAP_UNCOMPRESSED,
985 main(int argc, char *argv[])
987 char *init_progfile_dir_error;
989 int i, j, read_err, write_err;
990 gchar *read_err_info, *write_err_info;
992 static const struct option long_options[] = {
993 {"novlan", no_argument, NULL, 0x8100},
994 {"skip-radiotap-header", no_argument, NULL, 0x8101},
995 {"seed", required_argument, NULL, 0x8102},
996 {"inject-secrets", required_argument, NULL, 0x8103},
997 {"help", no_argument, NULL, 'h'},
998 {"version", no_argument, NULL, 'V'},
1003 guint32 snaplen = 0; /* No limit */
1004 chop_t chop = {0, 0, 0, 0, 0, 0}; /* No chop */
1005 gboolean adjlen = FALSE;
1006 wtap_dumper *pdh = NULL;
1007 unsigned int count = 1;
1008 unsigned int duplicate_count = 0;
1012 guint32 read_count = 0;
1013 guint32 split_packet_count = 0;
1014 int written_count = 0;
1015 char *filename = NULL;
1017 guint32 secs_per_block = 0;
1019 nstime_t block_start;
1020 gchar *fprefix = NULL;
1021 gchar *fsuffix = NULL;
1022 guint32 change_offset = 0;
1023 guint max_packet_number = 0;
1024 GArray *dsb_types = NULL;
1025 GPtrArray *dsb_filenames = NULL;
1026 const wtap_rec *rec;
1028 wtap_dump_params params = WTAP_DUMP_PARAMS_INIT;
1029 char *shb_user_appl;
1030 gboolean do_mutation;
1032 int ret = EXIT_SUCCESS;
1033 gboolean valid_seed = FALSE;
1034 unsigned int seed = 0;
1036 cmdarg_err_init(failure_warning_message, failure_message_cont);
1039 create_app_running_mutex();
1042 /* Initialize the version information. */
1043 ws_init_version_info("Editcap (Wireshark)", NULL, NULL, NULL);
1046 * Get credential information for later use.
1048 init_process_policies();
1051 * Attempt to get the pathname of the directory containing the
1054 init_progfile_dir_error = init_progfile_dir(argv[0]);
1055 if (init_progfile_dir_error != NULL) {
1057 "editcap: Can't get pathname of directory containing the editcap program: %s.\n",
1058 init_progfile_dir_error);
1059 g_free(init_progfile_dir_error);
1062 init_report_message(failure_warning_message, failure_warning_message,
1067 /* Process the options */
1068 while ((opt = getopt_long(argc, argv, ":a:A:B:c:C:dD:E:F:hi:I:Lo:rs:S:t:T:vVw:", long_options, NULL)) != -1) {
1078 skip_radiotap = TRUE;
1084 if (sscanf(optarg, "%u", &seed) != 1) {
1085 fprintf(stderr, "editcap: \"%s\" isn't a valid seed\n\n",
1087 ret = INVALID_OPTION;
1094 case 0x8103: /* --inject-secrets */
1096 guint32 secrets_type_id = 0;
1097 const char *secrets_filename = NULL;
1098 if (strcmp("help", optarg) == 0) {
1099 list_secrets_types(stdout);
1102 gchar **splitted = g_strsplit(optarg, ",", 2);
1104 secrets_type_id = lookup_secrets_type(splitted[0]);
1105 secrets_filename = splitted[1];
1108 if (secrets_type_id == 0) {
1109 fprintf(stderr, "editcap: \"%s\" isn't a valid secrets type\n", secrets_filename);
1110 g_strfreev(splitted);
1111 ret = INVALID_OPTION;
1114 if (!dsb_filenames) {
1115 dsb_types = g_array_new(FALSE, FALSE, sizeof(guint32));
1116 dsb_filenames = g_ptr_array_new_with_free_func(g_free);
1118 g_array_append_val(dsb_types, secrets_type_id);
1119 g_ptr_array_add(dsb_filenames, g_strdup(secrets_filename));
1120 g_strfreev(splitted);
1127 gint string_start_index = 0;
1129 if ((sscanf(optarg, "%u:%n", &frame_number, &string_start_index) < 1) || (string_start_index == 0)) {
1130 fprintf(stderr, "editcap: \"%s\" isn't a valid <frame>:<comment>\n\n",
1132 ret = INVALID_OPTION;
1136 /* Lazily create the table */
1137 if (!frames_user_comments) {
1138 frames_user_comments = g_tree_new_full(framenum_compare, NULL, NULL, g_free);
1141 /* Insert this entry (framenum -> comment) */
1142 g_tree_replace(frames_user_comments, GUINT_TO_POINTER(frame_number), g_strdup(optarg+string_start_index));
1150 memset(&starttm,0,sizeof(struct tm));
1152 if (!strptime(optarg,"%Y-%m-%d %T", &starttm)) {
1153 fprintf(stderr, "editcap: \"%s\" isn't a valid time format\n\n",
1155 ret = INVALID_OPTION;
1159 check_startstop = TRUE;
1160 starttm.tm_isdst = -1;
1162 starttime = mktime(&starttm);
1170 memset(&stoptm,0,sizeof(struct tm));
1172 if (!strptime(optarg,"%Y-%m-%d %T", &stoptm)) {
1173 fprintf(stderr, "editcap: \"%s\" isn't a valid time format\n\n",
1175 ret = INVALID_OPTION;
1178 check_startstop = TRUE;
1179 stoptm.tm_isdst = -1;
1180 stoptime = mktime(&stoptm);
1185 split_packet_count = get_nonzero_guint32(optarg, "packet count");
1190 int choplen = 0, chopoff = 0;
1192 switch (sscanf(optarg, "%d:%d", &chopoff, &choplen)) {
1193 case 1: /* only the chop length was specififed */
1198 case 2: /* both an offset and chop length was specified */
1202 fprintf(stderr, "editcap: \"%s\" isn't a valid chop length or offset:length\n",
1204 ret = INVALID_OPTION;
1210 chop.len_begin += choplen;
1212 chop.off_begin_pos += chopoff;
1214 chop.off_begin_neg += chopoff;
1215 } else if (choplen < 0) {
1216 chop.len_end += choplen;
1218 chop.off_end_pos += chopoff;
1220 chop.off_end_neg += chopoff;
1227 dup_detect_by_time = FALSE;
1228 dup_window = DEFAULT_DUP_DEPTH;
1233 dup_detect_by_time = FALSE;
1234 dup_window = get_guint32(optarg, "duplicate window");
1235 if (dup_window > MAX_DUP_DEPTH) {
1236 fprintf(stderr, "editcap: \"%d\" duplicate window value must be between 0 and %d inclusive.\n",
1237 dup_window, MAX_DUP_DEPTH);
1238 ret = INVALID_OPTION;
1244 err_prob = g_ascii_strtod(optarg, &p);
1245 if (p == optarg || err_prob < 0.0 || err_prob > 1.0) {
1246 fprintf(stderr, "editcap: probability \"%s\" must be between 0.0 and 1.0\n",
1248 ret = INVALID_OPTION;
1254 out_file_type_subtype = wtap_short_string_to_file_type_subtype(optarg);
1255 if (out_file_type_subtype < 0) {
1256 fprintf(stderr, "editcap: \"%s\" isn't a valid capture file type\n\n",
1258 list_capture_types(stderr);
1259 ret = INVALID_OPTION;
1265 show_help_header("Edit and/or translate the format of capture files.");
1266 print_usage(stdout);
1270 case 'i': /* break capture file based on time interval */
1271 secs_per_block = get_nonzero_guint32(optarg, "time interval");
1274 case 'I': /* ignored_bytes at the beginning of the frame for duplications removal */
1275 ignored_bytes = get_guint32(optarg, "number of bytes to ignore");
1283 change_offset = get_guint32(optarg, "change offset");
1287 keep_em = !keep_em; /* Just invert */
1291 snaplen = get_nonzero_guint32(optarg, "snapshot length");
1295 if (!set_strict_time_adj(optarg)) {
1296 ret = INVALID_OPTION;
1299 do_strict_time_adjustment = TRUE;
1303 if (!set_time_adjustment(optarg)) {
1304 ret = INVALID_OPTION;
1310 out_frame_type = wtap_short_string_to_encap(optarg);
1311 if (out_frame_type < 0) {
1312 fprintf(stderr, "editcap: \"%s\" isn't a valid encapsulation type\n\n",
1314 list_encap_types(stderr);
1315 ret = INVALID_OPTION;
1321 verbose = !verbose; /* Just invert */
1331 dup_detect_by_time = TRUE;
1332 dup_window = MAX_DUP_DEPTH;
1333 if (!set_rel_time(optarg)) {
1334 ret = INVALID_OPTION;
1339 case '?': /* Bad options if GNU getopt */
1340 case ':': /* missing option argument */
1343 list_capture_types(stdout);
1346 list_encap_types(stdout);
1350 fprintf(stderr, "editcap: invalid option -- '%c'\n", optopt);
1352 fprintf(stderr, "editcap: option requires an argument -- '%c'\n", optopt);
1354 print_usage(stderr);
1355 ret = INVALID_OPTION;
1361 } /* processing commmand-line options */
1364 fprintf(stderr, "Optind = %i, argc = %i\n", optind, argc);
1367 if ((argc - optind) < 2) {
1368 print_usage(stderr);
1369 ret = INVALID_OPTION;
1374 if (err_prob >= 0.0) {
1376 seed = (unsigned int) (time(NULL) + ws_getpid());
1379 fprintf(stderr, "Using seed %u\n", seed);
1384 if (check_startstop && !stoptime) {
1387 /* XXX: will work until 2035 */
1388 memset(&stoptm,0,sizeof(struct tm));
1389 stoptm.tm_year = 135;
1390 stoptm.tm_mday = 31;
1392 stoptm.tm_isdst = -1;
1394 stoptime = mktime(&stoptm);
1397 nstime_set_unset(&block_start);
1399 if (starttime > stoptime) {
1400 fprintf(stderr, "editcap: start time is after the stop time\n");
1401 ret = INVALID_OPTION;
1405 if (split_packet_count != 0 && secs_per_block != 0) {
1406 fprintf(stderr, "editcap: can't split on both packet count and time interval\n");
1407 fprintf(stderr, "editcap: at the same time\n");
1408 ret = INVALID_OPTION;
1412 wth = wtap_open_offline(argv[optind], WTAP_TYPE_AUTO, &read_err, &read_err_info, FALSE);
1415 cfile_open_failure_message("editcap", argv[optind], read_err,
1422 fprintf(stderr, "File %s is a %s capture file.\n", argv[optind],
1423 wtap_file_type_subtype_string(wtap_file_type_subtype(wth)));
1426 if (ignored_bytes != 0 && skip_radiotap == TRUE) {
1427 fprintf(stderr, "editcap: can't skip radiotap headers and %d byte(s)\n", ignored_bytes);
1428 fprintf(stderr, "editcap: at the start of packet at the same time\n");
1429 ret = INVALID_OPTION;
1433 if (skip_radiotap == TRUE && wtap_file_encap(wth) != WTAP_ENCAP_IEEE_802_11_RADIOTAP) {
1434 fprintf(stderr, "editcap: can't skip radiotap header because input file is incorrect\n");
1435 fprintf(stderr, "editcap: expected '%s', input is '%s'\n",
1436 wtap_encap_string(WTAP_ENCAP_IEEE_802_11_RADIOTAP),
1437 wtap_encap_string(wtap_file_type_subtype(wth)));
1438 ret = INVALID_OPTION;
1442 wtap_dump_params_init(¶ms, wth);
1444 if (dsb_filenames) {
1445 for (guint k = 0; k < dsb_filenames->len; k++) {
1446 guint32 secrets_type_id = g_array_index(dsb_types, guint32, k);
1447 const char *secrets_filename = (const char *)g_ptr_array_index(dsb_filenames, k);
1451 wtapng_dsb_mandatory_t *dsb;
1454 if (!g_file_get_contents(secrets_filename, &data, &data_len, &err)) {
1455 fprintf(stderr, "editcap: \"%s\" could not be read: %s\n", secrets_filename, err->message);
1456 g_clear_error(&err);
1457 ret = INVALID_OPTION;
1460 if (data_len == 0) {
1461 fprintf(stderr, "editcap: \"%s\" is an empty file, ignoring\n", secrets_filename);
1465 if (data_len >= G_MAXINT) {
1466 fprintf(stderr, "editcap: \"%s\" is too large, ignoring\n", secrets_filename);
1471 block = wtap_block_create(WTAP_BLOCK_DSB);
1472 dsb = (wtapng_dsb_mandatory_t *)wtap_block_get_mandatory_data(block);
1473 dsb->secrets_type = secrets_type_id;
1474 dsb->secrets_len = (guint)data_len;
1475 dsb->secrets_data = data;
1476 if (params.dsbs_initial == NULL) {
1477 params.dsbs_initial = g_array_new(FALSE, FALSE, sizeof(wtap_block_t));
1479 g_array_append_val(params.dsbs_initial, block);
1484 * If an encapsulation type was specified, override the encapsulation
1485 * type of the input file.
1487 if (out_frame_type != -2)
1488 params.encap = out_frame_type;
1491 * If a snapshot length was specified, and it's less than the snapshot
1492 * length of the input file, override the snapshot length of the input
1495 if (snaplen != 0 && snaplen < wtap_snapshot_length(wth))
1496 params.snaplen = snaplen;
1499 * Now process the arguments following the input and output file
1500 * names, if any; they specify packets to include/exclude.
1502 for (i = optind + 2; i < argc; i++)
1503 if (add_selection(argv[i], &max_packet_number) == FALSE)
1506 if (keep_em == FALSE)
1507 max_packet_number = G_MAXUINT;
1509 if (dup_detect || dup_detect_by_time) {
1510 for (i = 0; i < dup_window; i++) {
1511 memset(&fd_hash[i].digest, 0, 16);
1513 nstime_set_unset(&fd_hash[i].frame_time);
1517 /* Read all of the packets in turn */
1518 while (wtap_read(wth, &read_err, &read_err_info, &data_offset)) {
1519 if (max_packet_number <= read_count)
1524 rec = wtap_get_rec(wth);
1526 /* Extra actions for the first packet */
1527 if (read_count == 1) {
1528 if (split_packet_count != 0 || secs_per_block != 0) {
1529 if (!fileset_extract_prefix_suffix(argv[optind+1], &fprefix, &fsuffix)) {
1530 ret = CANT_EXTRACT_PREFIX;
1534 filename = fileset_get_filename_by_pattern(block_cnt++, rec, fprefix, fsuffix);
1536 filename = g_strdup(argv[optind+1]);
1540 /* If we don't have an application name add one */
1541 if (wtap_block_get_string_option_value(g_array_index(params.shb_hdrs, wtap_block_t, 0), OPT_SHB_USERAPPL, &shb_user_appl) != WTAP_OPTTYPE_SUCCESS) {
1542 wtap_block_add_string_option_format(g_array_index(params.shb_hdrs, wtap_block_t, 0), OPT_SHB_USERAPPL, "%s", get_appname_and_version());
1545 pdh = editcap_dump_open(filename, ¶ms, &write_err);
1548 cfile_dump_open_failure_message("editcap", filename,
1550 out_file_type_subtype);
1554 } /* first packet only handling */
1557 buf = wtap_get_buf_ptr(wth);
1560 * Not all packets have time stamps. Only process the time
1561 * stamp if we have one.
1563 if (rec->presence_flags & WTAP_HAS_TS) {
1564 if (nstime_is_unset(&block_start)) {
1565 block_start = rec->ts;
1567 if (secs_per_block != 0) {
1568 while (((guint32)(rec->ts.secs - block_start.secs) > secs_per_block)
1569 || ((guint32)(rec->ts.secs - block_start.secs) == secs_per_block
1570 && rec->ts.nsecs >= block_start.nsecs )) { /* time for the next file */
1572 if (!wtap_dump_close(pdh, &write_err)) {
1573 cfile_close_failure_message(filename, write_err);
1577 block_start.secs = block_start.secs + secs_per_block; /* reset for next interval */
1579 filename = fileset_get_filename_by_pattern(block_cnt++, rec, fprefix, fsuffix);
1583 fprintf(stderr, "Continuing writing in file %s\n", filename);
1585 pdh = editcap_dump_open(filename, ¶ms, &write_err);
1588 cfile_dump_open_failure_message("editcap", filename,
1590 out_file_type_subtype);
1596 } /* time stamp handling */
1598 if (split_packet_count != 0) {
1599 /* time for the next file? */
1600 if (written_count > 0 && (written_count % split_packet_count) == 0) {
1601 if (!wtap_dump_close(pdh, &write_err)) {
1602 cfile_close_failure_message(filename, write_err);
1608 filename = fileset_get_filename_by_pattern(block_cnt++, rec, fprefix, fsuffix);
1612 fprintf(stderr, "Continuing writing in file %s\n", filename);
1614 pdh = editcap_dump_open(filename, ¶ms, &write_err);
1616 cfile_dump_open_failure_message("editcap", filename,
1618 out_file_type_subtype);
1623 } /* split packet handling */
1625 if (check_startstop) {
1627 * Is the packet in the selected timeframe?
1628 * If the packet has no time stamp, the answer is "no".
1630 if (rec->presence_flags & WTAP_HAS_TS)
1631 ts_okay = (rec->ts.secs >= starttime) && (rec->ts.secs < stoptime);
1636 * No selected timeframe, so all packets are "in the
1637 * selected timeframe".
1642 if (ts_okay && ((!selected(count) && !keep_em)
1643 || (selected(count) && keep_em))) {
1645 if (verbose && !dup_detect && !dup_detect_by_time)
1646 fprintf(stderr, "Packet: %u\n", count);
1648 /* We simply write it, perhaps after truncating it; we could
1649 * do other things, like modify it. */
1651 rec = wtap_get_rec(wth);
1653 if (rec->presence_flags & WTAP_HAS_TS) {
1654 /* Do we adjust timestamps to ensure strict chronological
1656 if (do_strict_time_adjustment) {
1657 if (previous_time.secs || previous_time.nsecs) {
1658 if (!strict_time_adj.is_negative) {
1664 nstime_delta(&delta, ¤t, &previous_time);
1666 if (delta.secs < 0 || delta.nsecs < 0) {
1668 * A negative delta indicates that the current packet
1669 * has an absolute timestamp less than the previous packet
1670 * that it is being compared to. This is NOT a normal
1671 * situation since trace files usually have packets in
1672 * chronological order (oldest to newest).
1673 * Copy and change rather than modify
1676 /* fprintf(stderr, "++out of order, need to adjust this packet!\n"); */
1678 temp_rec.ts.secs = previous_time.secs + strict_time_adj.tv.secs;
1679 temp_rec.ts.nsecs = previous_time.nsecs;
1680 if (temp_rec.ts.nsecs + strict_time_adj.tv.nsecs >= ONE_BILLION) {
1683 temp_rec.ts.nsecs += strict_time_adj.tv.nsecs - ONE_BILLION;
1685 temp_rec.ts.nsecs += strict_time_adj.tv.nsecs;
1691 * A negative strict time adjustment is requested.
1692 * Unconditionally set each timestamp to previous
1693 * packet's timestamp plus delta.
1694 * Copy and change rather than modify returned
1698 temp_rec.ts.secs = previous_time.secs + strict_time_adj.tv.secs;
1699 temp_rec.ts.nsecs = previous_time.nsecs;
1700 if (temp_rec.ts.nsecs + strict_time_adj.tv.nsecs >= ONE_BILLION) {
1703 temp_rec.ts.nsecs += strict_time_adj.tv.nsecs - ONE_BILLION;
1705 temp_rec.ts.nsecs += strict_time_adj.tv.nsecs;
1710 previous_time = rec->ts;
1713 if (time_adj.tv.secs != 0) {
1714 /* Copy and change rather than modify returned rec */
1716 if (time_adj.is_negative)
1717 temp_rec.ts.secs -= time_adj.tv.secs;
1719 temp_rec.ts.secs += time_adj.tv.secs;
1723 if (time_adj.tv.nsecs != 0) {
1724 /* Copy and change rather than modify returned rec */
1726 if (time_adj.is_negative) { /* subtract */
1727 if (temp_rec.ts.nsecs < time_adj.tv.nsecs) { /* borrow */
1729 temp_rec.ts.nsecs += ONE_BILLION;
1731 temp_rec.ts.nsecs -= time_adj.tv.nsecs;
1733 if (temp_rec.ts.nsecs + time_adj.tv.nsecs >= ONE_BILLION) {
1736 temp_rec.ts.nsecs += time_adj.tv.nsecs - ONE_BILLION;
1738 temp_rec.ts.nsecs += time_adj.tv.nsecs;
1743 } /* time stamp adjustment */
1745 if (rec->rec_type == REC_TYPE_PACKET) {
1747 /* Limit capture length to snaplen */
1748 if (rec->rec_header.packet_header.caplen > snaplen) {
1749 /* Copy and change rather than modify returned wtap_rec */
1751 temp_rec.rec_header.packet_header.caplen = snaplen;
1754 /* If -L, also set reported length to snaplen */
1755 if (adjlen && rec->rec_header.packet_header.len > snaplen) {
1756 /* Copy and change rather than modify returned phdr */
1758 temp_rec.rec_header.packet_header.len = snaplen;
1765 * Copy and change rather than modify returned phdr.
1768 handle_chopping(chop, &temp_rec.rec_header.packet_header,
1769 &rec->rec_header.packet_header, &buf,
1773 /* remove vlan info */
1775 /* Copy and change rather than modify returned rec */
1777 remove_vlan_info(&rec->rec_header.packet_header, buf,
1778 &temp_rec.rec_header.packet_header.caplen);
1782 /* suppress duplicates by packet window */
1784 if (is_duplicate(buf, rec->rec_header.packet_header.caplen)) {
1786 fprintf(stderr, "Skipped: %u, Len: %u, MD5 Hash: ",
1788 rec->rec_header.packet_header.caplen);
1789 for (i = 0; i < 16; i++)
1790 fprintf(stderr, "%02x",
1791 (unsigned char)fd_hash[cur_dup_entry].digest[i]);
1792 fprintf(stderr, "\n");
1799 fprintf(stderr, "Packet: %u, Len: %u, MD5 Hash: ",
1801 rec->rec_header.packet_header.caplen);
1802 for (i = 0; i < 16; i++)
1803 fprintf(stderr, "%02x",
1804 (unsigned char)fd_hash[cur_dup_entry].digest[i]);
1805 fprintf(stderr, "\n");
1808 } /* suppression of duplicates */
1810 if (rec->presence_flags & WTAP_HAS_TS) {
1811 /* suppress duplicates by time window */
1812 if (dup_detect_by_time) {
1815 current.secs = rec->ts.secs;
1816 current.nsecs = rec->ts.nsecs;
1818 if (is_duplicate_rel_time(buf,
1819 rec->rec_header.packet_header.caplen,
1822 fprintf(stderr, "Skipped: %u, Len: %u, MD5 Hash: ",
1824 rec->rec_header.packet_header.caplen);
1825 for (i = 0; i < 16; i++)
1826 fprintf(stderr, "%02x",
1827 (unsigned char)fd_hash[cur_dup_entry].digest[i]);
1828 fprintf(stderr, "\n");
1835 fprintf(stderr, "Packet: %u, Len: %u, MD5 Hash: ",
1837 rec->rec_header.packet_header.caplen);
1838 for (i = 0; i < 16; i++)
1839 fprintf(stderr, "%02x",
1840 (unsigned char)fd_hash[cur_dup_entry].digest[i]);
1841 fprintf(stderr, "\n");
1845 } /* suppress duplicates by time window */
1848 /* Random error mutation */
1849 do_mutation = FALSE;
1851 if (err_prob > 0.0) {
1852 switch (rec->rec_type) {
1854 case REC_TYPE_PACKET:
1855 caplen = rec->rec_header.packet_header.caplen;
1859 case REC_TYPE_FT_SPECIFIC_EVENT:
1860 case REC_TYPE_FT_SPECIFIC_REPORT:
1861 caplen = rec->rec_header.ft_specific_header.record_len;
1865 case REC_TYPE_SYSCALL:
1866 caplen = rec->rec_header.syscall_header.event_filelen;
1871 if (change_offset > caplen) {
1872 fprintf(stderr, "change offset %u is longer than caplen %u in packet %u\n",
1873 change_offset, caplen, count);
1874 do_mutation = FALSE;
1879 int real_data_start = 0;
1881 /* Protect non-protocol data */
1882 switch (rec->rec_type) {
1884 case REC_TYPE_PACKET:
1885 if (wtap_file_type_subtype(wth) == WTAP_FILE_TYPE_SUBTYPE_CATAPULT_DCT2000)
1886 real_data_start = find_dct2000_real_data(buf);
1890 real_data_start += change_offset;
1892 for (i = real_data_start; i < (int) caplen; i++) {
1893 if (rand() <= err_prob * RAND_MAX) {
1894 err_type = rand() / (RAND_MAX / ERR_WT_TOTAL + 1);
1896 if (err_type < ERR_WT_BIT) {
1897 buf[i] ^= 1 << (rand() / (RAND_MAX / 8 + 1));
1898 err_type = ERR_WT_TOTAL;
1900 err_type -= ERR_WT_BYTE;
1903 if (err_type < ERR_WT_BYTE) {
1904 buf[i] = rand() / (RAND_MAX / 255 + 1);
1905 err_type = ERR_WT_TOTAL;
1907 err_type -= ERR_WT_BYTE;
1910 if (err_type < ERR_WT_ALNUM) {
1911 buf[i] = ALNUM_CHARS[rand() / (RAND_MAX / ALNUM_LEN + 1)];
1912 err_type = ERR_WT_TOTAL;
1914 err_type -= ERR_WT_ALNUM;
1917 if (err_type < ERR_WT_FMT) {
1918 if ((unsigned int)i < caplen - 2)
1919 g_strlcpy((char*) &buf[i], "%s", 2);
1920 err_type = ERR_WT_TOTAL;
1922 err_type -= ERR_WT_FMT;
1925 if (err_type < ERR_WT_AA) {
1926 for (j = i; j < (int) caplen; j++)
1932 } /* random error mutation */
1934 /* Find a packet comment we may need to write */
1935 if (frames_user_comments) {
1936 const char *comment =
1937 (const char*)g_tree_lookup(frames_user_comments, GUINT_TO_POINTER(read_count));
1938 /* XXX: What about comment changed to no comment? */
1939 if (comment != NULL) {
1940 /* Copy and change rather than modify returned rec */
1942 temp_rec.opt_comment = g_strdup(comment);
1943 temp_rec.has_comment_changed = TRUE;
1946 /* Copy and change rather than modify returned rec */
1948 temp_rec.has_comment_changed = FALSE;
1953 /* Attempt to dump out current frame to the output file */
1954 if (!wtap_dump(pdh, rec, buf, &write_err, &write_err_info)) {
1955 cfile_write_failure_message("editcap", argv[optind],
1957 write_err, write_err_info,
1959 out_file_type_subtype);
1971 if (read_err != 0) {
1972 /* Print a message noting that the read failed somewhere along the
1974 cfile_read_failure_message("editcap", argv[optind], read_err,
1979 /* No valid packages found, open the outfile so we can write an
1982 filename = g_strdup(argv[optind+1]);
1984 pdh = editcap_dump_open(filename, ¶ms, &write_err);
1986 cfile_dump_open_failure_message("editcap", filename,
1988 out_file_type_subtype);
1994 if (!wtap_dump_close(pdh, &write_err)) {
1995 cfile_close_failure_message(filename, write_err);
2001 if (frames_user_comments) {
2002 g_tree_destroy(frames_user_comments);
2006 fprintf(stderr, "%u packet%s seen, %u packet%s skipped with duplicate window of %i packets.\n",
2007 count - 1, plurality(count - 1, "", "s"), duplicate_count,
2008 plurality(duplicate_count, "", "s"), dup_window);
2009 } else if (dup_detect_by_time) {
2010 fprintf(stderr, "%u packet%s seen, %u packet%s skipped with duplicate time window equal to or less than %ld.%09ld seconds.\n",
2011 count - 1, plurality(count - 1, "", "s"), duplicate_count,
2012 plurality(duplicate_count, "", "s"),
2013 (long)relative_time_window.secs,
2014 (long int)relative_time_window.nsecs);
2018 if (dsb_filenames) {
2019 g_array_free(dsb_types, TRUE);
2020 g_ptr_array_free(dsb_filenames, TRUE);
2022 g_free(params.idb_inf);
2023 wtap_dump_params_cleanup(¶ms);
2031 /* Skip meta-information read from file to return offset of real
2034 find_dct2000_real_data(guint8 *buf)
2038 for (n = 0; buf[n] != '\0'; n++); /* Context name */
2040 n++; /* Context port number */
2041 for (; buf[n] != '\0'; n++); /* Timestamp */
2043 for (; buf[n] != '\0'; n++); /* Protocol name */
2045 for (; buf[n] != '\0'; n++); /* Variant number (as string) */
2047 for (; buf[n] != '\0'; n++); /* Outhdr (as string) */
2049 n += 2; /* Direction & encap */
2055 * We support up to 2 chopping regions in a single pass: one specified by the
2056 * positive chop length, and one by the negative chop length.
2059 handle_chopping(chop_t chop, wtap_packet_header *out_phdr,
2060 const wtap_packet_header *in_phdr, guint8 **buf,
2063 /* If we're not chopping anything from one side, then the offset for that
2064 * side is meaningless. */
2065 if (chop.len_begin == 0)
2066 chop.off_begin_pos = chop.off_begin_neg = 0;
2067 if (chop.len_end == 0)
2068 chop.off_end_pos = chop.off_end_neg = 0;
2070 if (chop.off_begin_neg < 0) {
2071 chop.off_begin_pos += in_phdr->caplen + chop.off_begin_neg;
2072 chop.off_begin_neg = 0;
2074 if (chop.off_end_pos > 0) {
2075 chop.off_end_neg += chop.off_end_pos - in_phdr->caplen;
2076 chop.off_end_pos = 0;
2079 /* If we've crossed chopping regions, swap them */
2080 if (chop.len_begin && chop.len_end) {
2081 if (chop.off_begin_pos > ((int)in_phdr->caplen + chop.off_end_neg)) {
2082 int tmp_len, tmp_off;
2084 tmp_off = in_phdr->caplen + chop.off_end_neg + chop.len_end;
2085 tmp_len = -chop.len_end;
2087 chop.off_end_neg = chop.len_begin + chop.off_begin_pos - in_phdr->caplen;
2088 chop.len_end = -chop.len_begin;
2090 chop.len_begin = tmp_len;
2091 chop.off_begin_pos = tmp_off;
2095 /* Make sure we don't chop off more than we have available */
2096 if (in_phdr->caplen < (guint32)(chop.off_begin_pos - chop.off_end_neg)) {
2100 if ((guint32)(chop.len_begin - chop.len_end) >
2101 (in_phdr->caplen - (guint32)(chop.off_begin_pos - chop.off_end_neg))) {
2102 chop.len_begin = in_phdr->caplen - (chop.off_begin_pos - chop.off_end_neg);
2106 /* Handle chopping from the beginning. Note that if a beginning offset
2107 * was specified, we need to keep that piece */
2108 if (chop.len_begin > 0) {
2109 *out_phdr = *in_phdr;
2111 if (chop.off_begin_pos > 0) {
2112 memmove(*buf + chop.off_begin_pos,
2113 *buf + chop.off_begin_pos + chop.len_begin,
2114 out_phdr->caplen - chop.len_begin);
2116 *buf += chop.len_begin;
2118 out_phdr->caplen -= chop.len_begin;
2121 if (in_phdr->len > (guint32)chop.len_begin)
2122 out_phdr->len -= chop.len_begin;
2129 /* Handle chopping from the end. Note that if an ending offset was
2130 * specified, we need to keep that piece */
2131 if (chop.len_end < 0) {
2132 *out_phdr = *in_phdr;
2134 if (chop.off_end_neg < 0) {
2135 memmove(*buf + (gint)out_phdr->caplen + (chop.len_end + chop.off_end_neg),
2136 *buf + (gint)out_phdr->caplen + chop.off_end_neg,
2139 out_phdr->caplen += chop.len_end;
2142 if (((signed int) in_phdr->len + chop.len_end) > 0)
2143 out_phdr->len += chop.len_end;
2147 /*in_phdr = out_phdr;*/
2152 * Editor modelines - http://www.wireshark.org/tools/modelines.html
2157 * indent-tabs-mode: nil
2160 * vi: set shiftwidth=4 tabstop=8 expandtab:
2161 * :indentSize=4:tabSize=8:noTabs=true: