1 /* Edit capture files. We can delete packets, adjust timestamps, or
2 * simply convert from one format to another format.
4 * Originally written by Richard Sharpe.
5 * Improved by Guy Harris.
6 * Further improved by Richard Sharpe.
8 * Copyright 2013, Richard Sharpe <realrichardsharpe[AT]gmail.com>
10 * Wireshark - Network traffic analyzer
11 * By Gerald Combs <gerald@wireshark.org>
12 * Copyright 1998 Gerald Combs
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License along
25 * with this program; if not, write to the Free Software Foundation, Inc.,
26 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
37 * Just make sure we include the prototype for strptime as well
38 * (needed for glibc 2.2) but make sure we do this only if not
58 #include <zlib.h> /* to get the libz version number */
63 #ifndef HAVE_GETOPT_LONG
64 #include "wsutil/wsgetopt.h"
68 #include <wsutil/file_util.h>
69 #include <wsutil/unicode-utils.h>
70 #include <process.h> /* getpid */
71 #ifdef HAVE_WINSOCK2_H
77 # include "wsutil/strptime.h"
80 #include <wsutil/crash_info.h>
81 #include <wsutil/filesystem.h>
82 #include <wsutil/md5.h>
83 #include <wsutil/plugins.h>
84 #include <wsutil/privileges.h>
85 #include <wsutil/report_err.h>
86 #include <wsutil/strnatcmp.h>
87 #include <wsutil/ws_diag_control.h>
88 #include <wsutil/ws_version_info.h>
90 #include "ringbuffer.h" /* For RINGBUFFER_MAX_NUM_FILES */
93 * Some globals so we can pass things to various routines
102 * Duplicate frame detection
104 typedef struct _fd_hash_t {
105 md5_byte_t digest[16];
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 int 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 int max_selected = -1;
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 = {{0, 0}, 0}; /* no adjustment */
164 static nstime_t relative_time_window = {0, 0}; /* de-dup time window */
165 static double err_prob = 0.0;
166 static time_t starttime = 0;
167 static time_t stoptime = 0;
168 static gboolean check_startstop = FALSE;
169 static gboolean dup_detect = FALSE;
170 static gboolean dup_detect_by_time = FALSE;
172 static int do_strict_time_adjustment = FALSE;
173 static struct time_adjustment strict_time_adj = {{0, 0}, 0}; /* strict time adjustment */
174 static nstime_t previous_time = {0, 0}; /* previous time */
176 static int find_dct2000_real_data(guint8 *buf);
177 static void handle_chopping(chop_t chop, struct wtap_pkthdr *out_phdr,
178 const struct wtap_pkthdr *in_phdr, guint8 **buf,
182 abs_time_to_str_with_sec_resolution(const nstime_t *abs_time)
185 gchar *buf = (gchar *)g_malloc(16);
187 tmp = localtime(&abs_time->secs);
190 g_snprintf(buf, 16, "%d%02d%02d%02d%02d%02d",
205 fileset_get_filename_by_pattern(guint idx, const struct wtap_pkthdr *phdr,
206 gchar *fprefix, gchar *fsuffix)
212 g_snprintf(filenum, sizeof(filenum), "%05u", idx % RINGBUFFER_MAX_NUM_FILES);
213 if (phdr->presence_flags & WTAP_HAS_TS) {
214 timestr = abs_time_to_str_with_sec_resolution(&phdr->ts);
215 abs_str = g_strconcat(fprefix, "_", filenum, "_", timestr, fsuffix, NULL);
218 abs_str = g_strconcat(fprefix, "_", filenum, fsuffix, NULL);
224 fileset_extract_prefix_suffix(const char *fname, gchar **fprefix, gchar **fsuffix)
226 char *pfx, *last_pathsep;
229 save_file = g_strdup(fname);
230 if (save_file == NULL) {
231 fprintf(stderr, "editcap: Out of memory\n");
235 last_pathsep = strrchr(save_file, G_DIR_SEPARATOR);
236 pfx = strrchr(save_file,'.');
237 if (pfx != NULL && (last_pathsep == NULL || pfx > last_pathsep)) {
238 /* The pathname has a "." in it, and it's in the last component
239 * of the pathname (because there is either only one component,
240 * i.e. last_pathsep is null as there are no path separators,
241 * or the "." is after the path separator before the last
244 * Treat it as a separator between the rest of the file name and
245 * the file name suffix, and arrange that the names given to the
246 * ring buffer files have the specified suffix, i.e. put the
247 * changing part of the name *before* the suffix. */
249 *fprefix = g_strdup(save_file);
250 pfx[0] = '.'; /* restore capfile_name */
251 *fsuffix = g_strdup(pfx);
253 /* Either there's no "." in the pathname, or it's in a directory
254 * component, so the last component has no suffix. */
255 *fprefix = g_strdup(save_file);
262 /* Add a selection item, a simple parser for now */
264 add_selection(char *sel)
269 if (++max_selected >= MAX_SELECTIONS) {
270 /* Let the user know we stopped selecting */
271 fprintf(stderr, "Out of room for packet selections!\n");
276 fprintf(stderr, "Add_Selected: %s\n", sel);
278 if ((locn = strchr(sel, '-')) == NULL) { /* No dash, so a single number? */
280 fprintf(stderr, "Not inclusive ...");
282 selectfrm[max_selected].inclusive = 0;
283 selectfrm[max_selected].first = atoi(sel);
286 fprintf(stderr, " %i\n", selectfrm[max_selected].first);
289 fprintf(stderr, "Inclusive ...");
292 selectfrm[max_selected].inclusive = 1;
293 selectfrm[max_selected].first = atoi(sel);
294 selectfrm[max_selected].second = atoi(next);
297 fprintf(stderr, " %i, %i\n", selectfrm[max_selected].first,
298 selectfrm[max_selected].second);
304 /* Was the packet selected? */
311 for (i = 0; i <= max_selected; i++) {
312 if (selectfrm[i].inclusive) {
313 if (selectfrm[i].first <= recno && selectfrm[i].second >= recno)
316 if (recno == selectfrm[i].first)
325 set_time_adjustment(char *optarg_str_p)
334 /* skip leading whitespace */
335 while (*optarg_str_p == ' ' || *optarg_str_p == '\t')
338 /* check for a negative adjustment */
339 if (*optarg_str_p == '-') {
340 time_adj.is_negative = 1;
344 /* collect whole number of seconds, if any */
345 if (*optarg_str_p == '.') { /* only fractional (i.e., .5 is ok) */
349 val = strtol(optarg_str_p, &frac, 10);
350 if (frac == NULL || frac == optarg_str_p
351 || val == LONG_MIN || val == LONG_MAX) {
352 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
356 if (val < 0) { /* implies '--' since we caught '-' above */
357 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
362 time_adj.tv.secs = val;
364 /* now collect the partial seconds, if any */
365 if (*frac != '\0') { /* chars left, so get fractional part */
366 val = strtol(&(frac[1]), &end, 10);
367 /* if more than 9 fractional digits truncate to 9 */
368 if ((end - &(frac[1])) > 9) {
369 frac[10] = 't'; /* 't' for truncate */
370 val = strtol(&(frac[1]), &end, 10);
372 if (*frac != '.' || end == NULL || end == frac || val < 0
373 || val > ONE_BILLION || val == LONG_MIN || val == LONG_MAX) {
374 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
379 return; /* no fractional digits */
382 /* adjust fractional portion from fractional to numerator
383 * e.g., in "1.5" from 5 to 500000000 since .5*10^9 = 500000000 */
384 if (frac && end) { /* both are valid */
385 frac_digits = end - frac - 1; /* fractional digit count (remember '.') */
386 while(frac_digits < 9) { /* this is frac of 10^9 */
391 time_adj.tv.nsecs = (int)val;
395 set_strict_time_adj(char *optarg_str_p)
404 /* skip leading whitespace */
405 while (*optarg_str_p == ' ' || *optarg_str_p == '\t')
409 * check for a negative adjustment
410 * A negative strict adjustment value is a flag
411 * to adjust all frames by the specifed delta time.
413 if (*optarg_str_p == '-') {
414 strict_time_adj.is_negative = 1;
418 /* collect whole number of seconds, if any */
419 if (*optarg_str_p == '.') { /* only fractional (i.e., .5 is ok) */
423 val = strtol(optarg_str_p, &frac, 10);
424 if (frac == NULL || frac == optarg_str_p
425 || val == LONG_MIN || val == LONG_MAX) {
426 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
430 if (val < 0) { /* implies '--' since we caught '-' above */
431 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
436 strict_time_adj.tv.secs = val;
438 /* now collect the partial seconds, if any */
439 if (*frac != '\0') { /* chars left, so get fractional part */
440 val = strtol(&(frac[1]), &end, 10);
441 /* if more than 9 fractional digits truncate to 9 */
442 if ((end - &(frac[1])) > 9) {
443 frac[10] = 't'; /* 't' for truncate */
444 val = strtol(&(frac[1]), &end, 10);
446 if (*frac != '.' || end == NULL || end == frac || val < 0
447 || val > ONE_BILLION || val == LONG_MIN || val == LONG_MAX) {
448 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
453 return; /* no fractional digits */
456 /* adjust fractional portion from fractional to numerator
457 * e.g., in "1.5" from 5 to 500000000 since .5*10^9 = 500000000 */
458 if (frac && end) { /* both are valid */
459 frac_digits = end - frac - 1; /* fractional digit count (remember '.') */
460 while(frac_digits < 9) { /* this is frac of 10^9 */
465 strict_time_adj.tv.nsecs = (int)val;
469 set_rel_time(char *optarg_str_p)
478 /* skip leading whitespace */
479 while (*optarg_str_p == ' ' || *optarg_str_p == '\t')
482 /* ignore negative adjustment */
483 if (*optarg_str_p == '-')
486 /* collect whole number of seconds, if any */
487 if (*optarg_str_p == '.') { /* only fractional (i.e., .5 is ok) */
491 val = strtol(optarg_str_p, &frac, 10);
492 if (frac == NULL || frac == optarg_str_p
493 || val == LONG_MIN || val == LONG_MAX) {
494 fprintf(stderr, "1: editcap: \"%s\" isn't a valid rel time value\n",
498 if (val < 0) { /* implies '--' since we caught '-' above */
499 fprintf(stderr, "2: editcap: \"%s\" isn't a valid rel time value\n",
504 relative_time_window.secs = val;
506 /* now collect the partial seconds, if any */
507 if (*frac != '\0') { /* chars left, so get fractional part */
508 val = strtol(&(frac[1]), &end, 10);
509 /* if more than 9 fractional digits truncate to 9 */
510 if ((end - &(frac[1])) > 9) {
511 frac[10] = 't'; /* 't' for truncate */
512 val = strtol(&(frac[1]), &end, 10);
514 if (*frac != '.' || end == NULL || end == frac || val < 0
515 || val > ONE_BILLION || val == LONG_MIN || val == LONG_MAX) {
516 fprintf(stderr, "3: editcap: \"%s\" isn't a valid rel time value\n",
521 return; /* no fractional digits */
524 /* adjust fractional portion from fractional to numerator
525 * e.g., in "1.5" from 5 to 500000000 since .5*10^9 = 500000000 */
526 if (frac && end) { /* both are valid */
527 frac_digits = end - frac - 1; /* fractional digit count (remember '.') */
528 while(frac_digits < 9) { /* this is frac of 10^9 */
533 relative_time_window.nsecs = (int)val;
537 is_duplicate(guint8* fd, guint32 len) {
541 /*Hint to ignore some bytes at the start of the frame for the digest calculation(-I option) */
545 new_fd = &fd[ignored_bytes];
546 new_len = len - (ignored_bytes);
549 if (cur_dup_entry >= dup_window)
552 /* Calculate our digest */
554 md5_append(&ms, new_fd, new_len);
555 md5_finish(&ms, fd_hash[cur_dup_entry].digest);
557 fd_hash[cur_dup_entry].len = len;
559 /* Look for duplicates */
560 for (i = 0; i < dup_window; i++) {
561 if (i == cur_dup_entry)
564 if (fd_hash[i].len == fd_hash[cur_dup_entry].len
565 && memcmp(fd_hash[i].digest, fd_hash[cur_dup_entry].digest, 16) == 0) {
574 is_duplicate_rel_time(guint8* fd, guint32 len, const nstime_t *current) {
578 /*Hint to ignore some bytes at the start of the frame for the digest calculation(-I option) */
582 new_fd = &fd[ignored_bytes];
583 new_len = len - (ignored_bytes);
586 if (cur_dup_entry >= dup_window)
589 /* Calculate our digest */
591 md5_append(&ms, new_fd, new_len);
592 md5_finish(&ms, fd_hash[cur_dup_entry].digest);
594 fd_hash[cur_dup_entry].len = len;
595 fd_hash[cur_dup_entry].frame_time.secs = current->secs;
596 fd_hash[cur_dup_entry].frame_time.nsecs = current->nsecs;
599 * Look for relative time related duplicates.
600 * This is hopefully a reasonably efficient mechanism for
601 * finding duplicates by rel time in the fd_hash[] cache.
602 * We check starting from the most recently added hash
603 * entries and work backwards towards older packets.
604 * This approach allows the dup test to be terminated
605 * when the relative time of a cached entry is found to
606 * be beyond the dup time window.
608 * Of course this assumes that the input trace file is
609 * "well-formed" in the sense that the packet timestamps are
610 * in strict chronologically increasing order (which is NOT
611 * always the case!!).
613 * The fd_hash[] table was deliberately created large (1,000,000).
614 * Looking for time related duplicates in large trace files with
615 * non-fractional dup time window values can potentially take
616 * a long time to complete.
619 for (i = cur_dup_entry - 1;; i--) {
626 if (i == cur_dup_entry) {
628 * We've decremented back to where we started.
634 if (nstime_is_unset(&(fd_hash[i].frame_time))) {
636 * We've decremented to an unused fd_hash[] entry.
642 nstime_delta(&delta, current, &fd_hash[i].frame_time);
644 if (delta.secs < 0 || delta.nsecs < 0) {
646 * A negative delta implies that the current packet
647 * has an absolute timestamp less than the cached packet
648 * that it is being compared to. This is NOT a normal
649 * situation since trace files usually have packets in
650 * chronological order (oldest to newest).
652 * There are several possible ways to deal with this:
653 * 1. 'continue' dup checking with the next cached frame.
654 * 2. 'break' from looking for a duplicate of the current frame.
655 * 3. Take the absolute value of the delta and see if that
656 * falls within the specifed dup time window.
658 * Currently this code does option 1. But it would pretty
659 * easy to add yet-another-editcap-option to select one of
660 * the other behaviors for dealing with out-of-sequence
666 cmp = nstime_cmp(&delta, &relative_time_window);
670 * The delta time indicates that we are now looking at
671 * cached packets beyond the specified dup time window.
675 } else if (fd_hash[i].len == fd_hash[cur_dup_entry].len
676 && memcmp(fd_hash[i].digest, fd_hash[cur_dup_entry].digest, 16) == 0) {
685 print_usage(FILE *output)
687 fprintf(output, "\n");
688 fprintf(output, "Usage: editcap [options] ... <infile> <outfile> [ <packet#>[-<packet#>] ... ]\n");
689 fprintf(output, "\n");
690 fprintf(output, "<infile> and <outfile> must both be present.\n");
691 fprintf(output, "A single packet or a range of packets can be selected.\n");
692 fprintf(output, "\n");
693 fprintf(output, "Packet selection:\n");
694 fprintf(output, " -r keep the selected packets; default is to delete them.\n");
695 fprintf(output, " -A <start time> only output packets whose timestamp is after (or equal\n");
696 fprintf(output, " to) the given time (format as YYYY-MM-DD hh:mm:ss).\n");
697 fprintf(output, " -B <stop time> only output packets whose timestamp is before the\n");
698 fprintf(output, " given time (format as YYYY-MM-DD hh:mm:ss).\n");
699 fprintf(output, "\n");
700 fprintf(output, "Duplicate packet removal:\n");
701 fprintf(output, " -d remove packet if duplicate (window == %d).\n", DEFAULT_DUP_DEPTH);
702 fprintf(output, " -D <dup window> remove packet if duplicate; configurable <dup window>\n");
703 fprintf(output, " Valid <dup window> values are 0 to %d.\n", MAX_DUP_DEPTH);
704 fprintf(output, " NOTE: A <dup window> of 0 with -v (verbose option) is\n");
705 fprintf(output, " useful to print MD5 hashes.\n");
706 fprintf(output, " -w <dup time window> remove packet if duplicate packet is found EQUAL TO OR\n");
707 fprintf(output, " LESS THAN <dup time window> prior to current packet.\n");
708 fprintf(output, " A <dup time window> is specified in relative seconds\n");
709 fprintf(output, " (e.g. 0.000001).\n");
710 fprintf(output, " -a <framenum>:<comment> Add or replace comment for given frame number\n");
711 fprintf(output, "\n");
712 fprintf(output, " -I <bytes to ignore> ignore the specified bytes at the beginning of\n");
713 fprintf(output, " the frame during MD5 hash calculation\n");
714 fprintf(output, " Useful to remove duplicated packets taken on\n");
715 fprintf(output, " several routers(differents mac addresses for \n");
716 fprintf(output, " example)\n");
717 fprintf(output, " e.g. -I 26 in case of Ether/IP/ will ignore \n");
718 fprintf(output, " ether(14) and IP header(20 - 4(src ip) - 4(dst ip)).\n");
719 fprintf(output, "\n");
720 fprintf(output, " NOTE: The use of the 'Duplicate packet removal' options with\n");
721 fprintf(output, " other editcap options except -v may not always work as expected.\n");
722 fprintf(output, " Specifically the -r, -t or -S options will very likely NOT have the\n");
723 fprintf(output, " desired effect if combined with the -d, -D or -w.\n");
724 fprintf(output, "\n");
725 fprintf(output, "Packet manipulation:\n");
726 fprintf(output, " -s <snaplen> truncate each packet to max. <snaplen> bytes of data.\n");
727 fprintf(output, " -C [offset:]<choplen> chop each packet by <choplen> bytes. Positive values\n");
728 fprintf(output, " chop at the packet beginning, negative values at the\n");
729 fprintf(output, " packet end. If an optional offset precedes the length,\n");
730 fprintf(output, " then the bytes chopped will be offset from that value.\n");
731 fprintf(output, " Positive offsets are from the packet beginning,\n");
732 fprintf(output, " negative offsets are from the packet end. You can use\n");
733 fprintf(output, " this option more than once, allowing up to 2 chopping\n");
734 fprintf(output, " regions within a packet provided that at least 1\n");
735 fprintf(output, " choplen is positive and at least 1 is negative.\n");
736 fprintf(output, " -L adjust the frame (i.e. reported) length when chopping\n");
737 fprintf(output, " and/or snapping\n");
738 fprintf(output, " -t <time adjustment> adjust the timestamp of each packet;\n");
739 fprintf(output, " <time adjustment> is in relative seconds (e.g. -0.5).\n");
740 fprintf(output, " -S <strict adjustment> adjust timestamp of packets if necessary to insure\n");
741 fprintf(output, " strict chronological increasing order. The <strict\n");
742 fprintf(output, " adjustment> is specified in relative seconds with\n");
743 fprintf(output, " values of 0 or 0.000001 being the most reasonable.\n");
744 fprintf(output, " A negative adjustment value will modify timestamps so\n");
745 fprintf(output, " that each packet's delta time is the absolute value\n");
746 fprintf(output, " of the adjustment specified. A value of -0 will set\n");
747 fprintf(output, " all packets to the timestamp of the first packet.\n");
748 fprintf(output, " -E <error probability> set the probability (between 0.0 and 1.0 incl.) that\n");
749 fprintf(output, " a particular packet byte will be randomly changed.\n");
750 fprintf(output, " -o <change offset> When used in conjuction with -E, skip some bytes from the\n");
751 fprintf(output, " beginning of the packet. This allows to preserve some\n");
752 fprintf(output, " bytes, in order to have some headers untouched.\n");
753 fprintf(output, "\n");
754 fprintf(output, "Output File(s):\n");
755 fprintf(output, " -c <packets per file> split the packet output to different files based on\n");
756 fprintf(output, " uniform packet counts with a maximum of\n");
757 fprintf(output, " <packets per file> each.\n");
758 fprintf(output, " -i <seconds per file> split the packet output to different files based on\n");
759 fprintf(output, " uniform time intervals with a maximum of\n");
760 fprintf(output, " <seconds per file> each.\n");
761 fprintf(output, " -F <capture type> set the output file type; default is pcapng. An empty\n");
762 fprintf(output, " \"-F\" option will list the file types.\n");
763 fprintf(output, " -T <encap type> set the output file encapsulation type; default is the\n");
764 fprintf(output, " same as the input file. An empty \"-T\" option will\n");
765 fprintf(output, " list the encapsulation types.\n");
766 fprintf(output, "\n");
767 fprintf(output, "Miscellaneous:\n");
768 fprintf(output, " -h display this help and exit.\n");
769 fprintf(output, " -v verbose output.\n");
770 fprintf(output, " If -v is used with any of the 'Duplicate Packet\n");
771 fprintf(output, " Removal' options (-d, -D or -w) then Packet lengths\n");
772 fprintf(output, " and MD5 hashes are printed to standard-error.\n");
773 fprintf(output, "\n");
777 const char *sstr; /* The short string */
778 const char *lstr; /* The long string */
782 string_compare(gconstpointer a, gconstpointer b)
784 return strcmp(((const struct string_elem *)a)->sstr,
785 ((const struct string_elem *)b)->sstr);
789 string_nat_compare(gconstpointer a, gconstpointer b)
791 return ws_ascii_strnatcmp(((const struct string_elem *)a)->sstr,
792 ((const struct string_elem *)b)->sstr);
796 string_elem_print(gpointer data, gpointer not_used _U_)
798 fprintf(stderr, " %s - %s\n",
799 ((struct string_elem *)data)->sstr,
800 ((struct string_elem *)data)->lstr);
804 list_capture_types(void) {
806 struct string_elem *captypes;
809 captypes = g_new(struct string_elem,WTAP_NUM_FILE_TYPES_SUBTYPES);
810 fprintf(stderr, "editcap: The available capture file types for the \"-F\" flag are:\n");
811 for (i = 0; i < WTAP_NUM_FILE_TYPES_SUBTYPES; i++) {
812 if (wtap_dump_can_open(i)) {
813 captypes[i].sstr = wtap_file_type_subtype_short_string(i);
814 captypes[i].lstr = wtap_file_type_subtype_string(i);
815 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
818 g_slist_foreach(list, string_elem_print, NULL);
824 list_encap_types(void) {
826 struct string_elem *encaps;
829 encaps = (struct string_elem *)g_malloc(sizeof(struct string_elem) * WTAP_NUM_ENCAP_TYPES);
830 fprintf(stderr, "editcap: The available encapsulation types for the \"-T\" flag are:\n");
831 for (i = 0; i < WTAP_NUM_ENCAP_TYPES; i++) {
832 encaps[i].sstr = wtap_encap_short_string(i);
833 if (encaps[i].sstr != NULL) {
834 encaps[i].lstr = wtap_encap_string(i);
835 list = g_slist_insert_sorted(list, &encaps[i], string_nat_compare);
838 g_slist_foreach(list, string_elem_print, NULL);
843 /* TODO: is there the equivalent of g_direct_equal? */
845 framenum_equal(gconstpointer a, gconstpointer b, gpointer user_data _U_)
854 * Don't report failures to load plugins because most (non-wiretap) plugins
855 * *should* fail to load (because we're not linked against libwireshark and
856 * dissector plugins need libwireshark).
859 failure_message(const char *msg_format _U_, va_list ap _U_)
865 get_editcap_compiled_info(GString *str)
868 g_string_append(str, ", ");
870 g_string_append(str, "with libz ");
872 g_string_append(str, ZLIB_VERSION);
873 #else /* ZLIB_VERSION */
874 g_string_append(str, "(version unknown)");
875 #endif /* ZLIB_VERSION */
876 #else /* HAVE_LIBZ */
877 g_string_append(str, "without libz");
878 #endif /* HAVE_LIBZ */
882 get_editcap_runtime_info(GString *str)
885 #if defined(HAVE_LIBZ) && !defined(_WIN32)
886 g_string_append_printf(str, ", with libz %s", zlibVersion());
891 main(int argc, char *argv[])
893 GString *comp_info_str;
894 GString *runtime_info_str;
896 int i, j, read_err, write_err;
897 gchar *read_err_info, *write_err_info;
900 static const struct option long_options[] = {
901 {(char *)"help", no_argument, NULL, 'h'},
902 {(char *)"version", no_argument, NULL, 'V'},
908 guint32 snaplen = 0; /* No limit */
909 chop_t chop = {0, 0, 0, 0, 0, 0}; /* No chop */
910 gboolean adjlen = FALSE;
911 wtap_dumper *pdh = NULL;
912 unsigned int count = 1;
913 unsigned int duplicate_count = 0;
917 guint32 read_count = 0;
918 int split_packet_count = 0;
919 int written_count = 0;
920 char *filename = NULL;
922 int secs_per_block = 0;
924 nstime_t block_start;
925 gchar *fprefix = NULL;
926 gchar *fsuffix = NULL;
927 guint32 change_offset = 0;
929 const struct wtap_pkthdr *phdr;
930 struct wtap_pkthdr temp_phdr;
931 wtapng_iface_descriptions_t *idb_inf = NULL;
932 wtapng_section_t *shb_hdr = NULL;
933 wtapng_name_res_t *nrb_hdr = NULL;
936 char* init_progfile_dir_error;
940 arg_list_utf_16to8(argc, argv);
941 create_app_running_mutex();
944 /* Get the compile-time version information string */
945 comp_info_str = get_compiled_version_info(NULL, get_editcap_compiled_info);
947 /* Get the run-time version information string */
948 runtime_info_str = get_runtime_version_info(get_editcap_runtime_info);
950 /* Add it to the information to be reported on a crash. */
951 ws_add_crash_info("Editcap (Wireshark) %s\n"
956 get_ws_vcs_version_info(), comp_info_str->str, runtime_info_str->str);
959 * Get credential information for later use.
961 init_process_policies();
962 init_open_routines();
965 /* Register wiretap plugins */
966 if ((init_progfile_dir_error = init_progfile_dir(argv[0], (void *)main))) {
967 g_warning("editcap: init_progfile_dir(): %s", init_progfile_dir_error);
968 g_free(init_progfile_dir_error);
970 /* Register all the plugin types we have. */
971 wtap_register_plugin_types(); /* Types known to libwiretap */
973 init_report_err(failure_message,NULL,NULL,NULL);
975 /* Scan for plugins. This does *not* call their registration routines;
976 that's done later. */
979 /* Register all libwiretap plugin modules. */
980 register_all_wiretap_modules();
984 /* Process the options */
985 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) {
990 gint string_start_index = 0;
992 if ((sscanf(optarg, "%u:%n", &frame_number, &string_start_index) < 1) || (string_start_index == 0)) {
993 fprintf(stderr, "editcap: \"%s\" isn't a valid <frame>:<comment>\n\n",
998 /* Lazily create the table */
999 if (!frames_user_comments) {
1000 frames_user_comments = g_tree_new_full(framenum_equal, NULL, NULL, g_free);
1003 /* Insert this entry (framenum -> comment) */
1004 g_tree_replace(frames_user_comments, GUINT_TO_POINTER(frame_number), g_strdup(optarg+string_start_index));
1012 memset(&starttm,0,sizeof(struct tm));
1014 if (!strptime(optarg,"%Y-%m-%d %T", &starttm)) {
1015 fprintf(stderr, "editcap: \"%s\" isn't a valid time format\n\n",
1020 check_startstop = TRUE;
1021 starttm.tm_isdst = -1;
1023 starttime = mktime(&starttm);
1031 memset(&stoptm,0,sizeof(struct tm));
1033 if (!strptime(optarg,"%Y-%m-%d %T", &stoptm)) {
1034 fprintf(stderr, "editcap: \"%s\" isn't a valid time format\n\n",
1038 check_startstop = TRUE;
1039 stoptm.tm_isdst = -1;
1040 stoptime = mktime(&stoptm);
1045 split_packet_count = (int)strtol(optarg, &p, 10);
1046 if (p == optarg || *p != '\0') {
1047 fprintf(stderr, "editcap: \"%s\" isn't a valid packet count\n",
1051 if (split_packet_count <= 0) {
1052 fprintf(stderr, "editcap: \"%d\" packet count must be larger than zero\n",
1053 split_packet_count);
1060 int choplen = 0, chopoff = 0;
1062 switch (sscanf(optarg, "%d:%d", &chopoff, &choplen)) {
1063 case 1: /* only the chop length was specififed */
1068 case 2: /* both an offset and chop length was specified */
1072 fprintf(stderr, "editcap: \"%s\" isn't a valid chop length or offset:length\n",
1079 chop.len_begin += choplen;
1081 chop.off_begin_pos += chopoff;
1083 chop.off_begin_neg += chopoff;
1084 } else if (choplen < 0) {
1085 chop.len_end += choplen;
1087 chop.off_end_pos += chopoff;
1089 chop.off_end_neg += chopoff;
1096 dup_detect_by_time = FALSE;
1097 dup_window = DEFAULT_DUP_DEPTH;
1102 dup_detect_by_time = FALSE;
1103 dup_window = (int)strtol(optarg, &p, 10);
1104 if (p == optarg || *p != '\0') {
1105 fprintf(stderr, "editcap: \"%s\" isn't a valid duplicate window value\n",
1109 if (dup_window < 0 || dup_window > MAX_DUP_DEPTH) {
1110 fprintf(stderr, "editcap: \"%d\" duplicate window value must be between 0 and %d inclusive.\n",
1111 dup_window, MAX_DUP_DEPTH);
1117 err_prob = g_ascii_strtod(optarg, &p);
1118 if (p == optarg || err_prob < 0.0 || err_prob > 1.0) {
1119 fprintf(stderr, "editcap: probability \"%s\" must be between 0.0 and 1.0\n",
1123 srand( (unsigned int) (time(NULL) + getpid()) );
1127 out_file_type_subtype = wtap_short_string_to_file_type_subtype(optarg);
1128 if (out_file_type_subtype < 0) {
1129 fprintf(stderr, "editcap: \"%s\" isn't a valid capture file type\n\n",
1131 list_capture_types();
1137 printf("Editcap (Wireshark) %s\n"
1138 "Edit and/or translate the format of capture files.\n"
1139 "See http://www.wireshark.org for more information.\n",
1140 get_ws_vcs_version_info());
1141 print_usage(stdout);
1145 case 'i': /* break capture file based on time interval */
1146 secs_per_block = atoi(optarg);
1147 if (secs_per_block <= 0) {
1148 fprintf(stderr, "editcap: \"%s\" isn't a valid time interval\n\n",
1154 case 'I': /* ignored_bytes at the beginning of the frame for duplications removal */
1155 ignored_bytes = atoi(optarg);
1156 if(ignored_bytes <= 0) {
1157 fprintf(stderr, "editcap: \"%s\" isn't a valid number of bytes to ignore\n", optarg);
1167 change_offset = (guint32)strtol(optarg, &p, 10);
1171 keep_em = !keep_em; /* Just invert */
1175 snaplen = (guint32)strtol(optarg, &p, 10);
1176 if (p == optarg || *p != '\0') {
1177 fprintf(stderr, "editcap: \"%s\" isn't a valid snapshot length\n",
1184 set_strict_time_adj(optarg);
1185 do_strict_time_adjustment = TRUE;
1189 set_time_adjustment(optarg);
1193 out_frame_type = wtap_short_string_to_encap(optarg);
1194 if (out_frame_type < 0) {
1195 fprintf(stderr, "editcap: \"%s\" isn't a valid encapsulation type\n\n",
1203 verbose = !verbose; /* Just invert */
1207 show_version("Editcap (Wireshark)", comp_info_str, runtime_info_str);
1208 g_string_free(comp_info_str, TRUE);
1209 g_string_free(runtime_info_str, TRUE);
1215 dup_detect_by_time = TRUE;
1216 dup_window = MAX_DUP_DEPTH;
1217 set_rel_time(optarg);
1220 case '?': /* Bad options if GNU getopt */
1223 list_capture_types();
1229 print_usage(stderr);
1235 } /* processing commmand-line options */
1238 fprintf(stderr, "Optind = %i, argc = %i\n", optind, argc);
1241 if ((argc - optind) < 1) {
1242 print_usage(stderr);
1246 if (check_startstop && !stoptime) {
1249 /* XXX: will work until 2035 */
1250 memset(&stoptm,0,sizeof(struct tm));
1251 stoptm.tm_year = 135;
1252 stoptm.tm_mday = 31;
1255 stoptime = mktime(&stoptm);
1258 nstime_set_unset(&block_start);
1260 if (starttime > stoptime) {
1261 fprintf(stderr, "editcap: start time is after the stop time\n");
1265 if (split_packet_count > 0 && secs_per_block > 0) {
1266 fprintf(stderr, "editcap: can't split on both packet count and time interval\n");
1267 fprintf(stderr, "editcap: at the same time\n");
1271 wth = wtap_open_offline(argv[optind], WTAP_TYPE_AUTO, &read_err, &read_err_info, FALSE);
1274 fprintf(stderr, "editcap: Can't open %s: %s\n", argv[optind],
1275 wtap_strerror(read_err));
1276 if (read_err_info != NULL) {
1277 fprintf(stderr, "(%s)\n", read_err_info);
1278 g_free(read_err_info);
1284 fprintf(stderr, "File %s is a %s capture file.\n", argv[optind],
1285 wtap_file_type_subtype_string(wtap_file_type_subtype(wth)));
1288 shb_hdr = wtap_file_get_shb_for_new_file(wth);
1289 idb_inf = wtap_file_get_idb_info(wth);
1290 nrb_hdr = wtap_file_get_nrb_for_new_file(wth);
1293 * Now, process the rest, if any ... we only write if there is an extra
1294 * argument or so ...
1297 if ((argc - optind) >= 2) {
1298 if (out_frame_type == -2)
1299 out_frame_type = wtap_file_encap(wth);
1301 for (i = optind + 2; i < argc; i++)
1302 if (add_selection(argv[i]) == FALSE)
1305 if (dup_detect || dup_detect_by_time) {
1306 for (i = 0; i < dup_window; i++) {
1307 memset(&fd_hash[i].digest, 0, 16);
1309 nstime_set_unset(&fd_hash[i].frame_time);
1313 /* Read all of the packets in turn */
1314 while (wtap_read(wth, &read_err, &read_err_info, &data_offset)) {
1317 phdr = wtap_phdr(wth);
1319 /* Extra actions for the first packet */
1320 if (read_count == 1) {
1321 if (split_packet_count > 0 || secs_per_block > 0) {
1322 if (!fileset_extract_prefix_suffix(argv[optind+1], &fprefix, &fsuffix))
1325 filename = fileset_get_filename_by_pattern(block_cnt++, phdr, fprefix, fsuffix);
1327 filename = g_strdup(argv[optind+1]);
1331 /* If we don't have an application name add Editcap */
1332 if (shb_hdr->shb_user_appl == NULL) {
1333 shb_hdr->shb_user_appl = g_strdup("Editcap " VERSION);
1336 pdh = wtap_dump_open_ng(filename, out_file_type_subtype, out_frame_type,
1337 snaplen ? MIN(snaplen, wtap_snapshot_length(wth)) : wtap_snapshot_length(wth),
1338 FALSE /* compressed */, shb_hdr, idb_inf, nrb_hdr, &write_err);
1341 fprintf(stderr, "editcap: Can't open or create %s: %s\n",
1342 filename, wtap_strerror(write_err));
1345 } /* first packet only handling */
1348 buf = wtap_buf_ptr(wth);
1351 * Not all packets have time stamps. Only process the time
1352 * stamp if we have one.
1354 if (phdr->presence_flags & WTAP_HAS_TS) {
1355 if (nstime_is_unset(&block_start)) {
1356 block_start.secs = phdr->ts.secs;
1357 block_start.nsecs = phdr->ts.nsecs;
1360 if (secs_per_block > 0) {
1361 while ((phdr->ts.secs - block_start.secs > secs_per_block)
1362 || (phdr->ts.secs - block_start.secs == secs_per_block
1363 && phdr->ts.nsecs >= block_start.nsecs )) { /* time for the next file */
1365 if (!wtap_dump_close(pdh, &write_err)) {
1366 fprintf(stderr, "editcap: Error writing to %s: %s\n",
1367 filename, wtap_strerror(write_err));
1370 block_start.secs = block_start.secs + secs_per_block; /* reset for next interval */
1372 filename = fileset_get_filename_by_pattern(block_cnt++, phdr, fprefix, fsuffix);
1376 fprintf(stderr, "Continuing writing in file %s\n", filename);
1378 pdh = wtap_dump_open_ng(filename, out_file_type_subtype, out_frame_type,
1379 snaplen ? MIN(snaplen, wtap_snapshot_length(wth)) : wtap_snapshot_length(wth),
1380 FALSE /* compressed */, shb_hdr, idb_inf, nrb_hdr, &write_err);
1383 fprintf(stderr, "editcap: Can't open or create %s: %s\n",
1384 filename, wtap_strerror(write_err));
1389 } /* time stamp handling */
1391 if (split_packet_count > 0) {
1392 /* time for the next file? */
1393 if (written_count > 0 && written_count % split_packet_count == 0) {
1394 if (!wtap_dump_close(pdh, &write_err)) {
1395 fprintf(stderr, "editcap: Error writing to %s: %s\n",
1396 filename, wtap_strerror(write_err));
1401 filename = fileset_get_filename_by_pattern(block_cnt++, phdr, fprefix, fsuffix);
1405 fprintf(stderr, "Continuing writing in file %s\n", filename);
1407 pdh = wtap_dump_open_ng(filename, out_file_type_subtype, out_frame_type,
1408 snaplen ? MIN(snaplen, wtap_snapshot_length(wth)) : wtap_snapshot_length(wth),
1409 FALSE /* compressed */, shb_hdr, idb_inf, nrb_hdr, &write_err);
1411 fprintf(stderr, "editcap: Can't open or create %s: %s\n",
1412 filename, wtap_strerror(write_err));
1416 } /* split packet handling */
1418 if (check_startstop) {
1420 * Is the packet in the selected timeframe?
1421 * If the packet has no time stamp, the answer is "no".
1423 if (phdr->presence_flags & WTAP_HAS_TS)
1424 ts_okay = (phdr->ts.secs >= starttime) && (phdr->ts.secs < stoptime);
1429 * No selected timeframe, so all packets are "in the
1430 * selected timeframe".
1435 if (ts_okay && ((!selected(count) && !keep_em)
1436 || (selected(count) && keep_em))) {
1438 if (verbose && !dup_detect && !dup_detect_by_time)
1439 fprintf(stderr, "Packet: %u\n", count);
1441 /* We simply write it, perhaps after truncating it; we could
1442 * do other things, like modify it. */
1444 phdr = wtap_phdr(wth);
1447 /* Limit capture length to snaplen */
1448 if (phdr->caplen > snaplen) {
1449 /* Copy and change rather than modify returned phdr */
1451 temp_phdr.caplen = snaplen;
1454 /* If -L, also set reported length to snaplen */
1455 if (adjlen && phdr->len > snaplen) {
1456 /* Copy and change rather than modify returned phdr */
1458 temp_phdr.len = snaplen;
1465 handle_chopping(chop, &temp_phdr, phdr, &buf, adjlen);
1468 if (phdr->presence_flags & WTAP_HAS_TS) {
1469 /* Do we adjust timestamps to ensure strict chronological
1471 if (do_strict_time_adjustment) {
1472 if (previous_time.secs || previous_time.nsecs) {
1473 if (!strict_time_adj.is_negative) {
1477 current.secs = phdr->ts.secs;
1478 current.nsecs = phdr->ts.nsecs;
1480 nstime_delta(&delta, ¤t, &previous_time);
1482 if (delta.secs < 0 || delta.nsecs < 0) {
1484 * A negative delta indicates that the current packet
1485 * has an absolute timestamp less than the previous packet
1486 * that it is being compared to. This is NOT a normal
1487 * situation since trace files usually have packets in
1488 * chronological order (oldest to newest).
1490 /* fprintf(stderr, "++out of order, need to adjust this packet!\n"); */
1492 temp_phdr.ts.secs = previous_time.secs + strict_time_adj.tv.secs;
1493 temp_phdr.ts.nsecs = previous_time.nsecs;
1494 if (temp_phdr.ts.nsecs + strict_time_adj.tv.nsecs > ONE_BILLION) {
1496 temp_phdr.ts.secs++;
1497 temp_phdr.ts.nsecs += strict_time_adj.tv.nsecs - ONE_BILLION;
1499 temp_phdr.ts.nsecs += strict_time_adj.tv.nsecs;
1505 * A negative strict time adjustment is requested.
1506 * Unconditionally set each timestamp to previous
1507 * packet's timestamp plus delta.
1510 temp_phdr.ts.secs = previous_time.secs + strict_time_adj.tv.secs;
1511 temp_phdr.ts.nsecs = previous_time.nsecs;
1512 if (temp_phdr.ts.nsecs + strict_time_adj.tv.nsecs > ONE_BILLION) {
1514 temp_phdr.ts.secs++;
1515 temp_phdr.ts.nsecs += strict_time_adj.tv.nsecs - ONE_BILLION;
1517 temp_phdr.ts.nsecs += strict_time_adj.tv.nsecs;
1522 previous_time.secs = phdr->ts.secs;
1523 previous_time.nsecs = phdr->ts.nsecs;
1526 /* assume that if the frame's tv_sec is 0, then
1527 * the timestamp isn't supported */
1528 if (phdr->ts.secs > 0 && time_adj.tv.secs != 0) {
1530 if (time_adj.is_negative)
1531 temp_phdr.ts.secs -= time_adj.tv.secs;
1533 temp_phdr.ts.secs += time_adj.tv.secs;
1537 /* assume that if the frame's tv_sec is 0, then
1538 * the timestamp isn't supported */
1539 if (phdr->ts.secs > 0 && time_adj.tv.nsecs != 0) {
1541 if (time_adj.is_negative) { /* subtract */
1542 if (temp_phdr.ts.nsecs < time_adj.tv.nsecs) { /* borrow */
1543 temp_phdr.ts.secs--;
1544 temp_phdr.ts.nsecs += ONE_BILLION;
1546 temp_phdr.ts.nsecs -= time_adj.tv.nsecs;
1548 if (temp_phdr.ts.nsecs + time_adj.tv.nsecs > ONE_BILLION) {
1550 temp_phdr.ts.secs++;
1551 temp_phdr.ts.nsecs += time_adj.tv.nsecs - ONE_BILLION;
1553 temp_phdr.ts.nsecs += time_adj.tv.nsecs;
1558 } /* time stamp adjustment */
1560 /* suppress duplicates by packet window */
1562 if (is_duplicate(buf, phdr->caplen)) {
1564 fprintf(stderr, "Skipped: %u, Len: %u, MD5 Hash: ",
1565 count, phdr->caplen);
1566 for (i = 0; i < 16; i++)
1567 fprintf(stderr, "%02x",
1568 (unsigned char)fd_hash[cur_dup_entry].digest[i]);
1569 fprintf(stderr, "\n");
1576 fprintf(stderr, "Packet: %u, Len: %u, MD5 Hash: ",
1577 count, phdr->caplen);
1578 for (i = 0; i < 16; i++)
1579 fprintf(stderr, "%02x",
1580 (unsigned char)fd_hash[cur_dup_entry].digest[i]);
1581 fprintf(stderr, "\n");
1584 } /* suppression of duplicates */
1586 if (phdr->presence_flags & WTAP_HAS_TS) {
1587 /* suppress duplicates by time window */
1588 if (dup_detect_by_time) {
1591 current.secs = phdr->ts.secs;
1592 current.nsecs = phdr->ts.nsecs;
1594 if (is_duplicate_rel_time(buf, phdr->caplen, ¤t)) {
1596 fprintf(stderr, "Skipped: %u, Len: %u, MD5 Hash: ",
1597 count, phdr->caplen);
1598 for (i = 0; i < 16; i++)
1599 fprintf(stderr, "%02x",
1600 (unsigned char)fd_hash[cur_dup_entry].digest[i]);
1601 fprintf(stderr, "\n");
1608 fprintf(stderr, "Packet: %u, Len: %u, MD5 Hash: ",
1609 count, phdr->caplen);
1610 for (i = 0; i < 16; i++)
1611 fprintf(stderr, "%02x",
1612 (unsigned char)fd_hash[cur_dup_entry].digest[i]);
1613 fprintf(stderr, "\n");
1617 } /* suppress duplicates by time window */
1619 if (change_offset > phdr->caplen) {
1620 fprintf(stderr, "change offset %u is longer than caplen %u in packet %u\n",
1621 change_offset, phdr->caplen, count);
1624 /* Random error mutation */
1625 if (err_prob > 0.0 && change_offset <= phdr->caplen) {
1626 int real_data_start = 0;
1628 /* Protect non-protocol data */
1629 if (wtap_file_type_subtype(wth) == WTAP_FILE_TYPE_SUBTYPE_CATAPULT_DCT2000)
1630 real_data_start = find_dct2000_real_data(buf);
1632 real_data_start += change_offset;
1634 for (i = real_data_start; i < (int) phdr->caplen; i++) {
1635 if (rand() <= err_prob * RAND_MAX) {
1636 err_type = rand() / (RAND_MAX / ERR_WT_TOTAL + 1);
1638 if (err_type < ERR_WT_BIT) {
1639 buf[i] ^= 1 << (rand() / (RAND_MAX / 8 + 1));
1640 err_type = ERR_WT_TOTAL;
1642 err_type -= ERR_WT_BYTE;
1645 if (err_type < ERR_WT_BYTE) {
1646 buf[i] = rand() / (RAND_MAX / 255 + 1);
1647 err_type = ERR_WT_TOTAL;
1649 err_type -= ERR_WT_BYTE;
1652 if (err_type < ERR_WT_ALNUM) {
1653 buf[i] = ALNUM_CHARS[rand() / (RAND_MAX / ALNUM_LEN + 1)];
1654 err_type = ERR_WT_TOTAL;
1656 err_type -= ERR_WT_ALNUM;
1659 if (err_type < ERR_WT_FMT) {
1660 if ((unsigned int)i < phdr->caplen - 2)
1661 g_strlcpy((char*) &buf[i], "%s", 2);
1662 err_type = ERR_WT_TOTAL;
1664 err_type -= ERR_WT_FMT;
1667 if (err_type < ERR_WT_AA) {
1668 for (j = i; j < (int) phdr->caplen; j++)
1674 } /* random error mutation */
1676 /* Find a packet comment we may need to write */
1677 if (frames_user_comments) {
1678 const char *comment =
1679 (const char*)g_tree_lookup(frames_user_comments, GUINT_TO_POINTER(read_count));
1680 if (comment != NULL) {
1681 /* Copy and change rather than modify returned phdr */
1683 temp_phdr.opt_comment = g_strdup(comment);
1688 /* Attempt to dump out current frame to the output file */
1689 if (!wtap_dump(pdh, phdr, buf, &write_err, &write_err_info)) {
1690 switch (write_err) {
1691 case WTAP_ERR_UNWRITABLE_ENCAP:
1693 * This is a problem with the particular frame we're
1694 * writing and the file type and subtype we're
1695 * writing; note that, and report the frame number
1696 * and file type/subtype.
1699 "editcap: Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
1700 read_count, argv[optind],
1701 wtap_file_type_subtype_string(out_file_type_subtype));
1704 case WTAP_ERR_PACKET_TOO_LARGE:
1706 * This is a problem with the particular frame we're
1707 * writing and the file type and subtype we're
1708 * writing; note that, and report the frame number
1709 * and file type/subtype.
1712 "editcap: Frame %u of \"%s\" is too large for a \"%s\" file.\n",
1713 read_count, argv[optind],
1714 wtap_file_type_subtype_string(out_file_type_subtype));
1717 case WTAP_ERR_UNWRITABLE_REC_TYPE:
1719 * This is a problem with the particular record we're
1720 * writing and the file type and subtype we're
1721 * writing; note that, and report the record number
1722 * and file type/subtype.
1725 "editcap: Record %u of \"%s\" has a record type that can't be saved in a \"%s\" file.\n",
1726 read_count, argv[optind],
1727 wtap_file_type_subtype_string(out_file_type_subtype));
1730 case WTAP_ERR_UNWRITABLE_REC_DATA:
1732 * This is a problem with the particular record we're
1733 * writing and the file type and subtype we're
1734 * writing; note that, and report the record number
1735 * and file type/subtype.
1738 "editcap: Record %u of \"%s\" has data that can't be saved in a \"%s\" file.\n(%s)\n",
1739 read_count, argv[optind],
1740 wtap_file_type_subtype_string(out_file_type_subtype),
1741 write_err_info != NULL ? write_err_info : "no information supplied");
1742 g_free(write_err_info);
1746 fprintf(stderr, "editcap: Error writing to %s: %s\n",
1747 filename, wtap_strerror(write_err));
1760 if (read_err != 0) {
1761 /* Print a message noting that the read failed somewhere along the
1764 "editcap: An error occurred while reading \"%s\": %s.\n",
1765 argv[optind], wtap_strerror(read_err));
1766 if (read_err_info != NULL) {
1767 fprintf(stderr, "(%s)\n", read_err_info);
1768 g_free(read_err_info);
1773 /* No valid packages found, open the outfile so we can write an
1776 filename = g_strdup(argv[optind+1]);
1778 pdh = wtap_dump_open_ng(filename, out_file_type_subtype, out_frame_type,
1779 snaplen ? MIN(snaplen, wtap_snapshot_length(wth)): wtap_snapshot_length(wth),
1780 FALSE /* compressed */, shb_hdr, idb_inf, nrb_hdr, &write_err);
1782 fprintf(stderr, "editcap: Can't open or create %s: %s\n",
1783 filename, wtap_strerror(write_err));
1791 if (!wtap_dump_close(pdh, &write_err)) {
1792 fprintf(stderr, "editcap: Error writing to %s: %s\n", filename,
1793 wtap_strerror(write_err));
1796 wtap_free_shb(shb_hdr);
1798 wtap_free_nrb(nrb_hdr);
1802 if (frames_user_comments) {
1803 g_tree_destroy(frames_user_comments);
1808 fprintf(stderr, "%u packet%s seen, %u packet%s skipped with duplicate window of %i packets.\n",
1809 count - 1, plurality(count - 1, "", "s"), duplicate_count,
1810 plurality(duplicate_count, "", "s"), dup_window);
1811 } else if (dup_detect_by_time) {
1812 fprintf(stderr, "%u packet%s seen, %u packet%s skipped with duplicate time window equal to or less than %ld.%09ld seconds.\n",
1813 count - 1, plurality(count - 1, "", "s"), duplicate_count,
1814 plurality(duplicate_count, "", "s"),
1815 (long)relative_time_window.secs,
1816 (long int)relative_time_window.nsecs);
1822 wtap_free_shb(shb_hdr);
1823 wtap_free_nrb(nrb_hdr);
1828 /* Skip meta-information read from file to return offset of real
1831 find_dct2000_real_data(guint8 *buf)
1835 for (n = 0; buf[n] != '\0'; n++); /* Context name */
1837 n++; /* Context port number */
1838 for (; buf[n] != '\0'; n++); /* Timestamp */
1840 for (; buf[n] != '\0'; n++); /* Protocol name */
1842 for (; buf[n] != '\0'; n++); /* Variant number (as string) */
1844 for (; buf[n] != '\0'; n++); /* Outhdr (as string) */
1846 n += 2; /* Direction & encap */
1852 * We support up to 2 chopping regions in a single pass: one specified by the
1853 * positive chop length, and one by the negative chop length.
1856 handle_chopping(chop_t chop, struct wtap_pkthdr *out_phdr,
1857 const struct wtap_pkthdr *in_phdr, guint8 **buf,
1860 /* Only packets can be chopped. */
1861 if (in_phdr->rec_type != REC_TYPE_PACKET)
1864 /* If we're not chopping anything from one side, then the offset for that
1865 * side is meaningless. */
1866 if (chop.len_begin == 0)
1867 chop.off_begin_pos = chop.off_begin_neg = 0;
1868 if (chop.len_end == 0)
1869 chop.off_end_pos = chop.off_end_neg = 0;
1871 if (chop.off_begin_neg < 0) {
1872 chop.off_begin_pos += in_phdr->caplen + chop.off_begin_neg;
1873 chop.off_begin_neg = 0;
1875 if (chop.off_end_pos > 0) {
1876 chop.off_end_neg += chop.off_end_pos - in_phdr->caplen;
1877 chop.off_end_pos = 0;
1880 /* If we've crossed chopping regions, swap them */
1881 if (chop.len_begin && chop.len_end) {
1882 if (chop.off_begin_pos > ((int)in_phdr->caplen + chop.off_end_neg)) {
1883 int tmp_len, tmp_off;
1885 tmp_off = in_phdr->caplen + chop.off_end_neg + chop.len_end;
1886 tmp_len = -chop.len_end;
1888 chop.off_end_neg = chop.len_begin + chop.off_begin_pos - in_phdr->caplen;
1889 chop.len_end = -chop.len_begin;
1891 chop.len_begin = tmp_len;
1892 chop.off_begin_pos = tmp_off;
1896 /* Make sure we don't chop off more than we have available */
1897 if (in_phdr->caplen < (guint32)(chop.off_begin_pos - chop.off_end_neg)) {
1901 if ((guint32)(chop.len_begin - chop.len_end) >
1902 (in_phdr->caplen - (guint32)(chop.off_begin_pos - chop.off_end_neg))) {
1903 chop.len_begin = in_phdr->caplen - (chop.off_begin_pos - chop.off_end_neg);
1907 /* Handle chopping from the beginning. Note that if a beginning offset
1908 * was specified, we need to keep that piece */
1909 if (chop.len_begin > 0) {
1910 *out_phdr = *in_phdr;
1912 if (chop.off_begin_pos > 0) {
1913 memmove(*buf + chop.off_begin_pos,
1914 *buf + chop.off_begin_pos + chop.len_begin,
1915 out_phdr->caplen - chop.len_begin);
1917 *buf += chop.len_begin;
1919 out_phdr->caplen -= chop.len_begin;
1922 if (in_phdr->len > (guint32)chop.len_begin)
1923 out_phdr->len -= chop.len_begin;
1930 /* Handle chopping from the end. Note that if an ending offset was
1931 * specified, we need to keep that piece */
1932 if (chop.len_end < 0) {
1933 *out_phdr = *in_phdr;
1935 if (chop.off_end_neg < 0) {
1936 memmove(*buf + (gint)out_phdr->caplen + (chop.len_end + chop.off_end_neg),
1937 *buf + (gint)out_phdr->caplen + chop.off_end_neg,
1940 out_phdr->caplen += chop.len_end;
1943 if (((signed int) in_phdr->len + chop.len_end) > 0)
1944 out_phdr->len += chop.len_end;
1948 /*in_phdr = out_phdr;*/
1953 * Editor modelines - http://www.wireshark.org/tools/modelines.html
1958 * indent-tabs-mode: nil
1961 * vi: set shiftwidth=4 tabstop=8 expandtab:
1962 * :indentSize=4:tabSize=8:noTabs=true: