-/* Edit capture files. We can delete records, adjust timestamps, or
+/* Edit capture files. We can delete packets, adjust timestamps, or
* simply convert from one format to another format.
*
- * $Id: editcap.c,v 1.21 2002/03/14 04:32:35 gram Exp $
+ * $Id$
*
* Originally written by Richard Sharpe.
* Improved by Guy Harris.
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+
+/*
+ * Just make sure we include the prototype for strptime as well
+ * (needed for glibc 2.2) but make sure we do this only if not
+ * yet defined.
+ */
+
+#ifndef __USE_XOPEN
+# define __USE_XOPEN
+#endif
+
+#include <time.h>
#include <glib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
+
+
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
-#ifdef HAVE_WINSOCK_H
-#include <winsock.h>
+#include "wtap.h"
+
+#ifdef HAVE_GETOPT_H
+#include <getopt.h>
+#else
+#include "wsutil/wsgetopt.h"
#endif
-#include <string.h>
-#include "wtap.h"
+#ifdef _WIN32
+#include <windows.h>
+#include <shellapi.h>
+#include <process.h> /* getpid */
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h>
+#endif
+#endif
-#ifdef NEED_GETOPT_H
-#include "getopt.h"
+#ifdef NEED_STRPTIME_H
+# include "wsutil/strptime.h"
#endif
+#include "epan/crypt/crypt-md5.h"
+#include "epan/plugins.h"
+#include "epan/report_err.h"
+#include "epan/filesystem.h"
+#include <wsutil/privileges.h>
+#include "epan/nstime.h"
+
+#include "svnversion.h"
+
/*
* Some globals so we can pass things to various routines
*/
};
+
+/*
+ * Duplicate frame detection
+ */
+typedef struct _fd_hash_t {
+ md5_byte_t digest[16];
+ guint32 len;
+ nstime_t time;
+} fd_hash_t;
+
+#define DEFAULT_DUP_DEPTH 5 /* Used with -d */
+#define MAX_DUP_DEPTH 1000000 /* the maximum window (and actual size of fd_hash[]) for de-duplication */
+
+fd_hash_t fd_hash[MAX_DUP_DEPTH];
+int dup_window = DEFAULT_DUP_DEPTH;
+int cur_dup_entry = 0;
+
#define ONE_MILLION 1000000
+#define ONE_BILLION 1000000000
+
+/* Weights of different errors we can introduce */
+/* We should probably make these command-line arguments */
+/* XXX - Should we add a bit-level error? */
+#define ERR_WT_BIT 5 /* Flip a random bit */
+#define ERR_WT_BYTE 5 /* Substitute a random byte */
+#define ERR_WT_ALNUM 5 /* Substitute a random character in [A-Za-z0-9] */
+#define ERR_WT_FMT 2 /* Substitute "%s" */
+#define ERR_WT_AA 1 /* Fill the remainder of the buffer with 0xAA */
+#define ERR_WT_TOTAL (ERR_WT_BIT + ERR_WT_BYTE + ERR_WT_ALNUM + ERR_WT_FMT + ERR_WT_AA)
+
+#define ALNUM_CHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
+#define ALNUM_LEN (sizeof(ALNUM_CHARS) - 1)
+
struct time_adjustment {
struct timeval tv;
int is_negative;
};
-struct select_item selectfrm[100];
-int max_selected = -1;
-static int count = 1;
+#define MAX_SELECTIONS 512
+static struct select_item selectfrm[MAX_SELECTIONS];
+static int max_selected = -1;
static int keep_em = 0;
static int out_file_type = WTAP_FILE_PCAP; /* default to "libpcap" */
static int out_frame_type = -2; /* Leave frame type alone */
static int verbose = 0; /* Not so verbose */
-static unsigned int snaplen = 0; /* No limit */
static struct time_adjustment time_adj = {{0, 0}, 0}; /* no adjustment */
+static nstime_t relative_time_window = {0, 0}; /* de-dup time window */
+static double err_prob = 0.0;
+static time_t starttime = 0;
+static time_t stoptime = 0;
+static gboolean check_startstop = FALSE;
+static gboolean dup_detect = FALSE;
+static gboolean dup_detect_by_time = FALSE;
+
+static int do_strict_time_adjustment = FALSE;
+static struct time_adjustment strict_time_adj = {{0, 0}, 0}; /* strict time adjustment */
+static nstime_t previous_time = {0, 0}; /* previous time */
+
+static int find_dct2000_real_data(guint8 *buf);
+
+static gchar *
+abs_time_to_str_with_sec_resolution(const struct wtap_nstime *abs_time)
+{
+ struct tm *tmp;
+ gchar *buf = g_malloc(16);
+
+#ifdef _MSC_VER
+ /* calling localtime() on MSVC 2005 with huge values causes it to crash */
+ /* XXX - find the exact value that still does work */
+ /* XXX - using _USE_32BIT_TIME_T might be another way to circumvent this problem */
+ if(abs_time->secs > 2000000000) {
+ tmp = NULL;
+ } else
+#endif
+ tmp = localtime(&abs_time->secs);
+ if (tmp) {
+ g_snprintf(buf, 16, "%d%02d%02d%02d%02d%02d",
+ tmp->tm_year + 1900,
+ tmp->tm_mon+1,
+ tmp->tm_mday,
+ tmp->tm_hour,
+ tmp->tm_min,
+ tmp->tm_sec);
+ } else
+ buf[0] = '\0';
+
+ return buf;
+}
-/* Add a selection item, a simple parser for now */
+static gchar*
+fileset_get_filename_by_pattern(guint idx, const struct wtap_nstime *time_val,
+ gchar *fprefix, gchar *fsuffix)
+{
+ gchar filenum[5+1];
+ gchar *timestr;
+ gchar *abs_str;
+
+ timestr = abs_time_to_str_with_sec_resolution(time_val);
+ g_snprintf(filenum, sizeof(filenum), "%05u", idx);
+ abs_str = g_strconcat(fprefix, "_", filenum, "_", timestr, fsuffix, NULL);
+ g_free(timestr);
+
+ return abs_str;
+}
-void add_selection(char *sel)
+static gboolean
+fileset_extract_prefix_suffix(const char *fname, gchar **fprefix, gchar **fsuffix)
+{
+ char *pfx, *last_pathsep;
+ gchar *save_file;
+
+ save_file = g_strdup(fname);
+ if (save_file == NULL) {
+ fprintf(stderr, "editcap: Out of memory\n");
+ return FALSE;
+ }
+
+ last_pathsep = strrchr(save_file, G_DIR_SEPARATOR);
+ pfx = strrchr(save_file,'.');
+ if (pfx != NULL && (last_pathsep == NULL || pfx > last_pathsep)) {
+ /* The pathname has a "." in it, and it's in the last component
+ of the pathname (because there is either only one component,
+ i.e. last_pathsep is null as there are no path separators,
+ or the "." is after the path separator before the last
+ component.
+
+ Treat it as a separator between the rest of the file name and
+ the file name suffix, and arrange that the names given to the
+ ring buffer files have the specified suffix, i.e. put the
+ changing part of the name *before* the suffix. */
+ pfx[0] = '\0';
+ *fprefix = g_strdup(save_file);
+ pfx[0] = '.'; /* restore capfile_name */
+ *fsuffix = g_strdup(pfx);
+ } else {
+ /* Either there's no "." in the pathname, or it's in a directory
+ component, so the last component has no suffix. */
+ *fprefix = g_strdup(save_file);
+ *fsuffix = NULL;
+ }
+ g_free(save_file);
+ return TRUE;
+}
+
+/* Add a selection item, a simple parser for now */
+static gboolean
+add_selection(char *sel)
{
char *locn;
char *next;
- if (max_selected == (sizeof(selectfrm)/sizeof(struct select_item)) - 1)
- return;
+ if (++max_selected >= MAX_SELECTIONS) {
+ /* Let the user know we stopped selecting */
+ printf("Out of room for packet selections!\n");
+ return(FALSE);
+ }
printf("Add_Selected: %s\n", sel);
printf("Not inclusive ...");
- max_selected++;
selectfrm[max_selected].inclusive = 0;
selectfrm[max_selected].first = atoi(sel);
printf("Inclusive ...");
next = locn + 1;
- max_selected++;
selectfrm[max_selected].inclusive = 1;
selectfrm[max_selected].first = atoi(sel);
selectfrm[max_selected].second = atoi(next);
}
-
+ return(TRUE);
}
-/* Was the record selected? */
+/* Was the packet selected? */
-int selected(int recno)
+static int
+selected(int recno)
{
int i = 0;
if (selectfrm[i].inclusive) {
if (selectfrm[i].first <= recno && selectfrm[i].second >= recno)
- return 1;
+ return 1;
}
else {
if (recno == selectfrm[i].first)
- return 1;
+ return 1;
}
}
}
-/* An argument to the callback routine */
-
-typedef struct {
- char *filename;
- wtap_dumper *pdh;
-} callback_arg;
+/* is the packet in the selected timeframe */
+static gboolean
+check_timestamp(wtap *wth)
+{
+ struct wtap_pkthdr* pkthdr = wtap_phdr(wth);
-/*
- *The callback routine that is called for each frame in the input file
- */
+ return ( pkthdr->ts.secs >= starttime ) && ( pkthdr->ts.secs < stoptime );
+}
static void
-edit_callback(u_char *user, const struct wtap_pkthdr *phdr, long offset,
- union wtap_pseudo_header *pseudo_header, const u_char *buf)
+set_time_adjustment(char *optarg_str_p)
{
- callback_arg *argp = (callback_arg *)user;
- int err;
- struct wtap_pkthdr snap_phdr;
-
- if ((!selected(count) && !keep_em) ||
- (selected(count) && keep_em)) {
-
- if (verbose)
- printf("Record: %u\n", count);
+ char *frac, *end;
+ long val;
+ size_t frac_digits;
- /* We simply write it, perhaps after truncating it; we could do other
- things, like modify it. */
+ if (!optarg_str_p)
+ return;
- if (snaplen != 0 && phdr->caplen > snaplen) {
- snap_phdr = *phdr;
- snap_phdr.caplen = snaplen;
- phdr = &snap_phdr;
- }
+ /* skip leading whitespace */
+ while (*optarg_str_p == ' ' || *optarg_str_p == '\t') {
+ optarg_str_p++;
+ }
- /* assume that if the frame's tv_sec is 0, then
- * the timestamp isn't supported */
- if (phdr->ts.tv_sec > 0 && time_adj.tv.tv_sec != 0) {
- snap_phdr = *phdr;
- if (time_adj.is_negative)
- snap_phdr.ts.tv_sec -= time_adj.tv.tv_sec;
- else
- snap_phdr.ts.tv_sec += time_adj.tv.tv_sec;
- phdr = &snap_phdr;
- }
+ /* check for a negative adjustment */
+ if (*optarg_str_p == '-') {
+ time_adj.is_negative = 1;
+ optarg_str_p++;
+ }
- /* assume that if the frame's tv_sec is 0, then
- * the timestamp isn't supported */
- if (phdr->ts.tv_sec > 0 && time_adj.tv.tv_usec != 0) {
- snap_phdr = *phdr;
- if (time_adj.is_negative) { /* subtract */
- if (snap_phdr.ts.tv_usec < time_adj.tv.tv_usec) { /* borrow */
- snap_phdr.ts.tv_sec--;
- snap_phdr.ts.tv_usec += ONE_MILLION;
- }
- snap_phdr.ts.tv_usec -= time_adj.tv.tv_usec;
- } else { /* add */
- if (snap_phdr.ts.tv_usec + time_adj.tv.tv_usec > ONE_MILLION) {
- /* carry */
- snap_phdr.ts.tv_sec++;
- snap_phdr.ts.tv_usec += time_adj.tv.tv_usec - ONE_MILLION;
- } else {
- snap_phdr.ts.tv_usec += time_adj.tv.tv_usec;
- }
+ /* collect whole number of seconds, if any */
+ if (*optarg_str_p == '.') { /* only fractional (i.e., .5 is ok) */
+ val = 0;
+ frac = optarg_str_p;
+ } else {
+ val = strtol(optarg_str_p, &frac, 10);
+ if (frac == NULL || frac == optarg_str_p || val == LONG_MIN || val == LONG_MAX) {
+ fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
+ optarg_str_p);
+ exit(1);
}
- phdr = &snap_phdr;
- }
-
- if (!wtap_dump(argp->pdh, phdr, pseudo_header, buf, &err)) {
+ if (val < 0) { /* implies '--' since we caught '-' above */
+ fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
+ optarg_str_p);
+ exit(1);
+ }
+ }
+ time_adj.tv.tv_sec = val;
- fprintf(stderr, "editcap: Error writing to %s: %s\n", argp->filename,
- wtap_strerror(err));
+ /* now collect the partial seconds, if any */
+ if (*frac != '\0') { /* chars left, so get fractional part */
+ val = strtol(&(frac[1]), &end, 10);
+ /* if more than 6 fractional digits truncate to 6 */
+ if((end - &(frac[1])) > 6) {
+ frac[7] = 't'; /* 't' for truncate */
+ val = strtol(&(frac[1]), &end, 10);
+ }
+ if (*frac != '.' || end == NULL || end == frac
+ || val < 0 || val > ONE_MILLION || val == LONG_MIN || val == LONG_MAX) {
+ fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
+ optarg_str_p);
exit(1);
-
}
-
+ }
+ else {
+ return; /* no fractional digits */
}
- count++;
-
+ /* adjust fractional portion from fractional to numerator
+ * e.g., in "1.5" from 5 to 500000 since .5*10^6 = 500000 */
+ if (frac && end) { /* both are valid */
+ frac_digits = end - frac - 1; /* fractional digit count (remember '.') */
+ while(frac_digits < 6) { /* this is frac of 10^6 */
+ val *= 10;
+ frac_digits++;
+ }
+ }
+ time_adj.tv.tv_usec = val;
}
static void
-set_time_adjustment(char *optarg)
+set_strict_time_adj(char *optarg_str_p)
{
char *frac, *end;
long val;
- int frac_digits;
+ size_t frac_digits;
- if (!optarg)
+ if (!optarg_str_p)
return;
/* skip leading whitespace */
- while (*optarg == ' ' || *optarg == '\t') {
- optarg++;
+ while (*optarg_str_p == ' ' || *optarg_str_p == '\t') {
+ optarg_str_p++;
}
- /* check for a negative adjustment */
- if (*optarg == '-') {
- time_adj.is_negative = 1;
- optarg++;
+ /*
+ * check for a negative adjustment
+ * A negative strict adjustment value is a flag
+ * to adjust all frames by the specifed delta time.
+ */
+ if (*optarg_str_p == '-') {
+ strict_time_adj.is_negative = 1;
+ optarg_str_p++;
}
/* collect whole number of seconds, if any */
- if (*optarg == '.') { /* only fractional (i.e., .5 is ok) */
+ if (*optarg_str_p == '.') { /* only fractional (i.e., .5 is ok) */
val = 0;
- frac = optarg;
+ frac = optarg_str_p;
} else {
- val = strtol(optarg, &frac, 10);
- if (frac == NULL || frac == optarg || val == LONG_MIN || val == LONG_MAX) {
- fprintf(stderr, "editcap: \"%s\" is not a valid time adjustment\n",
- optarg);
+ val = strtol(optarg_str_p, &frac, 10);
+ if (frac == NULL || frac == optarg_str_p || val == LONG_MIN || val == LONG_MAX) {
+ fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
+ optarg_str_p);
exit(1);
}
if (val < 0) { /* implies '--' since we caught '-' above */
- fprintf(stderr, "editcap: \"%s\" is not a valid time adjustment\n",
- optarg);
+ fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
+ optarg_str_p);
exit(1);
}
}
- time_adj.tv.tv_sec = val;
+ strict_time_adj.tv.tv_sec = val;
/* now collect the partial seconds, if any */
if (*frac != '\0') { /* chars left, so get fractional part */
val = strtol(&(frac[1]), &end, 10);
+ /* if more than 6 fractional digits truncate to 6 */
+ if((end - &(frac[1])) > 6) {
+ frac[7] = 't'; /* 't' for truncate */
+ val = strtol(&(frac[1]), &end, 10);
+ }
if (*frac != '.' || end == NULL || end == frac
|| val < 0 || val > ONE_MILLION || val == LONG_MIN || val == LONG_MAX) {
- fprintf(stderr, "editcap: \"%s\" is not a valid time adjustment\n",
- optarg);
+ fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
+ optarg_str_p);
exit(1);
}
}
frac_digits++;
}
}
- time_adj.tv.tv_usec = val;
+ strict_time_adj.tv.tv_usec = val;
}
-void usage()
+static void
+set_rel_time(char *optarg_str_p)
{
+ char *frac, *end;
+ long val;
+ size_t frac_digits;
+
+ if (!optarg_str_p)
+ return;
+
+ /* skip leading whitespace */
+ while (*optarg_str_p == ' ' || *optarg_str_p == '\t') {
+ optarg_str_p++;
+ }
+
+ /* ignore negative adjustment */
+ if (*optarg_str_p == '-') {
+ optarg_str_p++;
+ }
+
+ /* collect whole number of seconds, if any */
+ if (*optarg_str_p == '.') { /* only fractional (i.e., .5 is ok) */
+ val = 0;
+ frac = optarg_str_p;
+ } else {
+ val = strtol(optarg_str_p, &frac, 10);
+ if (frac == NULL || frac == optarg_str_p || val == LONG_MIN || val == LONG_MAX) {
+ fprintf(stderr, "1: editcap: \"%s\" isn't a valid rel time value\n",
+ optarg_str_p);
+ exit(1);
+ }
+ if (val < 0) { /* implies '--' since we caught '-' above */
+ fprintf(stderr, "2: editcap: \"%s\" isn't a valid rel time value\n",
+ optarg_str_p);
+ exit(1);
+ }
+ }
+ relative_time_window.secs = val;
+
+ /* now collect the partial seconds, if any */
+ if (*frac != '\0') { /* chars left, so get fractional part */
+ val = strtol(&(frac[1]), &end, 10);
+ /* if more than 9 fractional digits truncate to 9 */
+ if((end - &(frac[1])) > 9) {
+ frac[10] = 't'; /* 't' for truncate */
+ val = strtol(&(frac[1]), &end, 10);
+ }
+ if (*frac != '.' || end == NULL || end == frac
+ || val < 0 || val > ONE_BILLION || val == LONG_MIN || val == LONG_MAX) {
+ fprintf(stderr, "3: editcap: \"%s\" isn't a valid rel time value\n",
+ optarg_str_p);
+ exit(1);
+ }
+ }
+ else {
+ return; /* no fractional digits */
+ }
+
+ /* adjust fractional portion from fractional to numerator
+ * e.g., in "1.5" from 5 to 500000000 since .5*10^9 = 500000000 */
+ if (frac && end) { /* both are valid */
+ frac_digits = end - frac - 1; /* fractional digit count (remember '.') */
+ while(frac_digits < 9) { /* this is frac of 10^9 */
+ val *= 10;
+ frac_digits++;
+ }
+ }
+ relative_time_window.nsecs = val;
+}
+
+static gboolean
+is_duplicate(guint8* fd, guint32 len) {
+ int i;
+ md5_state_t ms;
+
+ cur_dup_entry++;
+ if (cur_dup_entry >= dup_window)
+ cur_dup_entry = 0;
+
+ /* Calculate our digest */
+ md5_init(&ms);
+ md5_append(&ms, fd, len);
+ md5_finish(&ms, fd_hash[cur_dup_entry].digest);
+
+ fd_hash[cur_dup_entry].len = len;
+
+ /* Look for duplicates */
+ for (i = 0; i < dup_window; i++) {
+ if (i == cur_dup_entry)
+ continue;
+
+ if (fd_hash[i].len == fd_hash[cur_dup_entry].len &&
+ memcmp(fd_hash[i].digest, fd_hash[cur_dup_entry].digest, 16) == 0) {
+ return TRUE;
+ }
+ }
+
+ return FALSE;
+}
+
+static gboolean
+is_duplicate_rel_time(guint8* fd, guint32 len, const nstime_t *current) {
int i;
- const char *string;
-
- fprintf(stderr, "Usage: editcap [-r] [-h] [-v] [-T <encap type>] [-F <capture type>]\n");
- fprintf(stderr, " [-s <snaplen>] [-t <time adjustment\n");
- fprintf(stderr, " <infile> <outfile> [ <record#>[-<record#>] ... ]\n");
- fprintf(stderr, " where\t-r specifies that the records specified should be kept, not deleted, \n");
- fprintf(stderr, " default is to delete\n");
- fprintf(stderr, " \t-v specifies verbose operation, default is silent\n");
- fprintf(stderr, " \t-h produces this help listing.\n");
- fprintf(stderr, " \t-T <encap type> specifies the encapsulation type to use:\n");
- for (i = 0; i < WTAP_NUM_ENCAP_TYPES; i++) {
- string = wtap_encap_short_string(i);
- if (string != NULL)
- fprintf(stderr, " \t %s - %s\n",
- string, wtap_encap_string(i));
- }
- fprintf(stderr, " \t default is the same as the input file\n");
- fprintf(stderr, " \t-F <capture type> specifies the capture file type to write:\n");
- for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
- if (wtap_dump_can_open(i))
- fprintf(stderr, " \t %s - %s\n",
- wtap_file_type_short_string(i), wtap_file_type_string(i));
- }
- fprintf(stderr, " \t default is libpcap\n");
- fprintf(stderr, " \t-s <snaplen> specifies that packets should be truncated to\n");
- fprintf(stderr, " \t <snaplen> bytes of data\n");
- fprintf(stderr, " \t-t <time adjustment> specifies the time adjustment\n");
- fprintf(stderr, " \t to be applied to selected packets\n");
- fprintf(stderr, "\n \t A range of records can be specified as well\n");
+ md5_state_t ms;
+
+ cur_dup_entry++;
+ if (cur_dup_entry >= dup_window)
+ cur_dup_entry = 0;
+
+ /* Calculate our digest */
+ md5_init(&ms);
+ md5_append(&ms, fd, len);
+ md5_finish(&ms, fd_hash[cur_dup_entry].digest);
+
+ fd_hash[cur_dup_entry].len = len;
+ fd_hash[cur_dup_entry].time.secs = current->secs;
+ fd_hash[cur_dup_entry].time.nsecs = current->nsecs;
+
+ /*
+ * Look for relative time related duplicates.
+ * This is hopefully a reasonably efficient mechanism for
+ * finding duplicates by rel time in the fd_hash[] cache.
+ * We check starting from the most recently added hash
+ * entries and work backwards towards older packets.
+ * This approach allows the dup test to be terminated
+ * when the relative time of a cached entry is found to
+ * be beyond the dup time window.
+ *
+ * Of course this assumes that the input trace file is
+ * "well-formed" in the sense that the packet timestamps are
+ * in strict chronologically increasing order (which is NOT
+ * always the case!!).
+ *
+ * The fd_hash[] table was deliberatly created large (1,000,000).
+ * Looking for time related duplicates in large trace files with
+ * non-fractional dup time window values can potentially take
+ * a long time to complete.
+ */
+
+ for (i = cur_dup_entry - 1;; i--) {
+ nstime_t delta;
+ int cmp;
+
+ if (i < 0) {
+ i = dup_window - 1;
+ }
+
+ if (i == cur_dup_entry) {
+ /*
+ * We've decremented back to where we started.
+ * Check no more!
+ */
+ break;
+ }
+
+ if (nstime_is_unset(&(fd_hash[i].time))) {
+ /*
+ * We've decremented to an unused fd_hash[] entry.
+ * Check no more!
+ */
+ break;
+ }
+
+ nstime_delta(&delta, current, &fd_hash[i].time);
+
+ if(delta.secs < 0 || delta.nsecs < 0)
+ {
+ /*
+ * A negative delta implies that the current packet
+ * has an absolute timestamp less than the cached packet
+ * that it is being compared to. This is NOT a normal
+ * situation since trace files usually have packets in
+ * chronological order (oldest to newest).
+ *
+ * There are several possible ways to deal with this:
+ * 1. 'continue' dup checking with the next cached frame.
+ * 2. 'break' from looking for a duplicate of the current frame.
+ * 3. Take the absolute value of the delta and see if that
+ * falls within the specifed dup time window.
+ *
+ * Currently this code does option 1. But it would pretty
+ * easy to add yet-another-editcap-option to select one of
+ * the other behaviors for dealing with out-of-sequence
+ * packets.
+ */
+ continue;
+ }
+
+ cmp = nstime_cmp(&delta, &relative_time_window);
+
+ if(cmp > 0) {
+ /*
+ * The delta time indicates that we are now looking at
+ * cached packets beyond the specified dup time window.
+ * Check no more!
+ */
+ break;
+ } else if (fd_hash[i].len == fd_hash[cur_dup_entry].len &&
+ memcmp(fd_hash[i].digest, fd_hash[cur_dup_entry].digest, 16) == 0) {
+ return TRUE;
+ }
+ }
+
+ return FALSE;
+}
+
+static void
+usage(gboolean is_error)
+{
+ FILE *output;
+
+ if (!is_error)
+ output = stdout;
+ else
+ output = stderr;
+
+ fprintf(output, "Editcap %s"
+#ifdef SVNVERSION
+ " (" SVNVERSION " from " SVNPATH ")"
+#endif
+ "\n", VERSION);
+ fprintf(output, "Edit and/or translate the format of capture files.\n");
+ fprintf(output, "See http://www.wireshark.org for more information.\n");
+ fprintf(output, "\n");
+ fprintf(output, "Usage: editcap [options] ... <infile> <outfile> [ <packet#>[-<packet#>] ... ]\n");
+ fprintf(output, "\n");
+ fprintf(output, "<infile> and <outfile> must both be present.\n");
+ fprintf(output, "A single packet or a range of packets can be selected.\n");
+ fprintf(output, "\n");
+ fprintf(output, "Packet selection:\n");
+ fprintf(output, " -r keep the selected packets; default is to delete them.\n");
+ fprintf(output, " -A <start time> only output packets whose timestamp is after (or equal\n");
+ fprintf(output, " to) the given time (format as YYYY-MM-DD hh:mm:ss).\n");
+ fprintf(output, " -B <stop time> only output packets whose timestamp is before the\n");
+ fprintf(output, " given time (format as YYYY-MM-DD hh:mm:ss).\n");
+ fprintf(output, "\n");
+ fprintf(output, "Duplicate packet removal:\n");
+ fprintf(output, " -d remove packet if duplicate (window == %d).\n", DEFAULT_DUP_DEPTH);
+ fprintf(output, " -D <dup window> remove packet if duplicate; configurable <dup window>\n");
+ fprintf(output, " Valid <dup window> values are 0 to %d.\n", MAX_DUP_DEPTH);
+ fprintf(output, " NOTE: A <dup window> of 0 with -v (verbose option) is\n");
+ fprintf(output, " useful to print MD5 hashes.\n");
+ fprintf(output, " -w <dup time window> remove packet if duplicate packet is found EQUAL TO OR\n");
+ fprintf(output, " LESS THAN <dup time window> prior to current packet.\n");
+ fprintf(output, " A <dup time window> is specified in relative seconds\n");
+ fprintf(output, " (e.g. 0.000001).\n");
+ fprintf(output, "\n");
+ fprintf(output, " NOTE: The use of the 'Duplicate packet removal' options with\n");
+ fprintf(output, " other editcap options except -v may not always work as expected.\n");
+ fprintf(output, " Specifically the -r, -t or -S options will very likely NOT have the\n");
+ fprintf(output, " desired effect if combined with the -d, -D or -w.\n");
+ fprintf(output, "\n");
+ fprintf(output, "Packet manipulation:\n");
+ fprintf(output, " -s <snaplen> truncate each packet to max. <snaplen> bytes of data.\n");
+ fprintf(output, " -C <choplen> chop each packet by <choplen> bytes. Positive values\n");
+ fprintf(output, " chop at the packet beginning, negative values at the\n");
+ fprintf(output, " packet end.\n");
+ fprintf(output, " -t <time adjustment> adjust the timestamp of each packet;\n");
+ fprintf(output, " <time adjustment> is in relative seconds (e.g. -0.5).\n");
+ fprintf(output, " -S <strict adjustment> adjust timestamp of packets if necessary to insure\n");
+ fprintf(output, " strict chronological increasing order. The <strict\n");
+ fprintf(output, " adjustment> is specified in relative seconds with\n");
+ fprintf(output, " values of 0 or 0.000001 being the most reasonable.\n");
+ fprintf(output, " A negative adjustment value will modify timestamps so\n");
+ fprintf(output, " that each packet's delta time is the absolute value\n");
+ fprintf(output, " of the adjustment specified. A value of -0 will set\n");
+ fprintf(output, " all packets to the timestamp of the first packet.\n");
+ fprintf(output, " -E <error probability> set the probability (between 0.0 and 1.0 incl.)\n");
+ fprintf(output, " that a particular packet byte will be randomly changed.\n");
+ fprintf(output, "\n");
+ fprintf(output, "Output File(s):\n");
+ fprintf(output, " -c <packets per file> split the packet output to different files\n");
+ fprintf(output, " based on uniform packet counts\n");
+ fprintf(output, " with a maximum of <packets per file> each.\n");
+ fprintf(output, " -i <seconds per file> split the packet output to different files\n");
+ fprintf(output, " based on uniform time intervals\n");
+ fprintf(output, " with a maximum of <seconds per file> each.\n");
+ fprintf(output, " -F <capture type> set the output file type; default is libpcap.\n");
+ fprintf(output, " an empty \"-F\" option will list the file types.\n");
+ fprintf(output, " -T <encap type> set the output file encapsulation type;\n");
+ fprintf(output, " default is the same as the input file.\n");
+ fprintf(output, " an empty \"-T\" option will list the encapsulation types.\n");
+ fprintf(output, "\n");
+ fprintf(output, "Miscellaneous:\n");
+ fprintf(output, " -h display this help and exit.\n");
+ fprintf(output, " -v verbose output.\n");
+ fprintf(output, " If -v is used with any of the 'Duplicate Packet\n");
+ fprintf(output, " Removal' options (-d, -D or -w) then Packet lengths\n");
+ fprintf(output, " and MD5 hashes are printed to standard-out.\n");
+ fprintf(output, "\n");
}
-int main(int argc, char *argv[])
+struct string_elem {
+ const char *sstr; /* The short string */
+ const char *lstr; /* The long string */
+};
+static gint
+string_compare(gconstpointer a, gconstpointer b)
+{
+ return strcmp(((struct string_elem *)a)->sstr,
+ ((struct string_elem *)b)->sstr);
+}
+
+static void
+string_elem_print(gpointer data, gpointer not_used _U_)
+{
+ fprintf(stderr, " %s - %s\n",
+ ((struct string_elem *)data)->sstr,
+ ((struct string_elem *)data)->lstr);
+}
+
+static void
+list_capture_types(void) {
+ int i;
+ struct string_elem *captypes;
+ GSList *list = NULL;
+
+ captypes = g_malloc(sizeof(struct string_elem) * WTAP_NUM_FILE_TYPES);
+ fprintf(stderr, "editcap: The available capture file types for the \"-F\" flag are:\n");
+ for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
+ if (wtap_dump_can_open(i)) {
+ captypes[i].sstr = wtap_file_type_short_string(i);
+ captypes[i].lstr = wtap_file_type_string(i);
+ list = g_slist_insert_sorted(list, &captypes[i], string_compare);
+ }
+ }
+ g_slist_foreach(list, string_elem_print, NULL);
+ g_slist_free(list);
+ g_free(captypes);
+}
+
+static void
+list_encap_types(void) {
+ int i;
+ struct string_elem *encaps;
+ GSList *list = NULL;
+
+ encaps = g_malloc(sizeof(struct string_elem) * WTAP_NUM_ENCAP_TYPES);
+ fprintf(stderr, "editcap: The available encapsulation types for the \"-T\" flag are:\n");
+ for (i = 0; i < WTAP_NUM_ENCAP_TYPES; i++) {
+ encaps[i].sstr = wtap_encap_short_string(i);
+ if (encaps[i].sstr != NULL) {
+ encaps[i].lstr = wtap_encap_string(i);
+ list = g_slist_insert_sorted(list, &encaps[i], string_compare);
+ }
+ }
+ g_slist_foreach(list, string_elem_print, NULL);
+ g_slist_free(list);
+ g_free(encaps);
+}
+
+#ifdef HAVE_PLUGINS
+/*
+ * Don't report failures to load plugins because most (non-wiretap) plugins
+ * *should* fail to load (because we're not linked against libwireshark and
+ * dissector plugins need libwireshark).
+ */
+static void
+failure_message(const char *msg_format _U_, va_list ap _U_)
+{
+ return;
+}
+#endif
+
+int
+main(int argc, char *argv[])
{
wtap *wth;
- int i, err;
- callback_arg args;
- extern char *optarg;
- extern int optind;
+ int i, j, err;
+ gchar *err_info;
int opt;
+
+#ifdef _WIN32
+ LPWSTR *wc_argv;
+ int wc_argc;
+#endif /* _WIN32 */
+
char *p;
- int snapshot_length;
+ unsigned int snaplen = 0; /* No limit */
+ int choplen = 0; /* No chop */
+ wtap_dumper *pdh = NULL;
+ int count = 1;
+ unsigned duplicate_count = 0;
+ gint64 data_offset;
+ struct wtap_pkthdr snap_phdr;
+ const struct wtap_pkthdr *phdr;
+ int err_type;
+ guint8 *buf;
+ int split_packet_count = 0;
+ int written_count = 0;
+ char *filename = NULL;
+ gboolean check_ts;
+ int secs_per_block = 0;
+ int block_cnt = 0;
+ nstime_t block_start;
+ gchar *fprefix = NULL;
+ gchar *fsuffix = NULL;
+
+#ifdef HAVE_PLUGINS
+ char* init_progfile_dir_error;
+#endif
- /* Process the options first */
+#ifdef _WIN32
+ /* Convert our arg list to UTF-8. */
+ wc_argv = CommandLineToArgvW(GetCommandLineW(), &wc_argc);
+ if (wc_argv && wc_argc == argc) {
+ for (i = 0; i < argc; i++) {
+ argv[i] = g_utf16_to_utf8(wc_argv[i], -1, NULL, NULL, NULL);
+ }
+ } /* XXX else bail because something is horribly, horribly wrong? */
+#endif /* _WIN32 */
- while ((opt = getopt(argc, argv, "T:F:rvs:t:h")) !=-1) {
+ /*
+ * Get credential information for later use.
+ */
+ init_process_policies();
+
+#ifdef HAVE_PLUGINS
+ /* Register wiretap plugins */
+ if ((init_progfile_dir_error = init_progfile_dir(argv[0], main))) {
+ g_warning("capinfos: init_progfile_dir(): %s", init_progfile_dir_error);
+ g_free(init_progfile_dir_error);
+ } else {
+ init_report_err(failure_message,NULL,NULL,NULL);
+ init_plugins();
+ }
+#endif
+
+ /* Process the options */
+ while ((opt = getopt(argc, argv, "A:B:c:C:dD:E:F:hrs:i:t:S:T:vw:")) !=-1) {
switch (opt) {
- case 'T':
- out_frame_type = wtap_short_string_to_encap(optarg);
- if (out_frame_type < 0) {
- fprintf(stderr, "editcap: \"%s\" is not a valid encapsulation type\n",
- optarg);
- exit(1);
+ case 'E':
+ err_prob = strtod(optarg, &p);
+ if (p == optarg || err_prob < 0.0 || err_prob > 1.0) {
+ fprintf(stderr, "editcap: probability \"%s\" must be between 0.0 and 1.0\n",
+ optarg);
+ exit(1);
}
+ srand( (unsigned int) (time(NULL) + getpid()) );
break;
-
+
case 'F':
out_file_type = wtap_short_string_to_file_type(optarg);
if (out_file_type < 0) {
- fprintf(stderr, "editcap: \"%s\" is not a valid capture file type\n",
- optarg);
- exit(1);
+ fprintf(stderr, "editcap: \"%s\" isn't a valid capture file type\n\n",
+ optarg);
+ list_capture_types();
+ exit(1);
}
break;
- case 'v':
- verbose = !verbose; /* Just invert */
+ case 'c':
+ split_packet_count = strtol(optarg, &p, 10);
+ if (p == optarg || *p != '\0') {
+ fprintf(stderr, "editcap: \"%s\" isn't a valid packet count\n",
+ optarg);
+ exit(1);
+ }
+ if (split_packet_count <= 0) {
+ fprintf(stderr, "editcap: \"%d\" packet count must be larger than zero\n",
+ split_packet_count);
+ exit(1);
+ }
+ break;
+
+ case 'C':
+ choplen = strtol(optarg, &p, 10);
+ if (p == optarg || *p != '\0') {
+ fprintf(stderr, "editcap: \"%s\" isn't a valid chop length\n",
+ optarg);
+ exit(1);
+ }
+ break;
+
+ case 'd':
+ dup_detect = TRUE;
+ dup_detect_by_time = FALSE;
+ dup_window = DEFAULT_DUP_DEPTH;
+ break;
+
+ case 'D':
+ dup_detect = TRUE;
+ dup_detect_by_time = FALSE;
+ dup_window = strtol(optarg, &p, 10);
+ if (p == optarg || *p != '\0') {
+ fprintf(stderr, "editcap: \"%s\" isn't a valid duplicate window value\n",
+ optarg);
+ exit(1);
+ }
+ if (dup_window < 0 || dup_window > MAX_DUP_DEPTH) {
+ fprintf(stderr, "editcap: \"%d\" duplicate window value must be between 0 and %d inclusive.\n",
+ dup_window, MAX_DUP_DEPTH);
+ exit(1);
+ }
+ break;
+
+ case 'w':
+ dup_detect = FALSE;
+ dup_detect_by_time = TRUE;
+ dup_window = MAX_DUP_DEPTH;
+ set_rel_time(optarg);
+ break;
+
+ case '?': /* Bad options if GNU getopt */
+ switch(optopt) {
+ case'F':
+ list_capture_types();
+ break;
+ case'T':
+ list_encap_types();
+ break;
+ default:
+ usage(TRUE);
+ }
+ exit(1);
+ break;
+
+ case 'h':
+ usage(FALSE);
+ exit(1);
break;
case 'r':
case 's':
snaplen = strtol(optarg, &p, 10);
if (p == optarg || *p != '\0') {
- fprintf(stderr, "editcap: \"%s\" is not a valid snapshot length\n",
- optarg);
- exit(1);
+ fprintf(stderr, "editcap: \"%s\" isn't a valid snapshot length\n",
+ optarg);
+ exit(1);
}
break;
set_time_adjustment(optarg);
break;
- case 'h':
- usage();
- exit(1);
+ case 'S':
+ set_strict_time_adj(optarg);
+ do_strict_time_adjustment = TRUE;
break;
- case '?': /* Bad options if GNU getopt */
- usage();
- exit(1);
+ case 'T':
+ out_frame_type = wtap_short_string_to_encap(optarg);
+ if (out_frame_type < 0) {
+ fprintf(stderr, "editcap: \"%s\" isn't a valid encapsulation type\n\n",
+ optarg);
+ list_encap_types();
+ exit(1);
+ }
+ break;
+
+ case 'v':
+ verbose = !verbose; /* Just invert */
+ break;
+
+ case 'i': /* break capture file based on time interval */
+ secs_per_block = atoi(optarg);
+ if(secs_per_block <= 0) {
+ fprintf(stderr, "editcap: \"%s\" isn't a valid time interval\n\n", optarg);
+ exit(1);
+ }
break;
+ case 'A':
+ {
+ struct tm starttm;
+
+ memset(&starttm,0,sizeof(struct tm));
+
+ if(!strptime(optarg,"%Y-%m-%d %T",&starttm)) {
+ fprintf(stderr, "editcap: \"%s\" isn't a valid time format\n\n", optarg);
+ exit(1);
+ }
+
+ check_startstop = TRUE;
+ starttm.tm_isdst = -1;
+
+ starttime = mktime(&starttm);
+ break;
+ }
+
+ case 'B':
+ {
+ struct tm stoptm;
+
+ memset(&stoptm,0,sizeof(struct tm));
+
+ if(!strptime(optarg,"%Y-%m-%d %T",&stoptm)) {
+ fprintf(stderr, "editcap: \"%s\" isn't a valid time format\n\n", optarg);
+ exit(1);
+ }
+ check_startstop = TRUE;
+ stoptm.tm_isdst = -1;
+ stoptime = mktime(&stoptm);
+ break;
+ }
}
}
if ((argc - optind) < 1) {
- usage();
+ usage(TRUE);
exit(1);
}
- wth = wtap_open_offline(argv[optind], &err, FALSE);
+ if (check_startstop && !stoptime) {
+ struct tm stoptm;
+ /* XXX: will work until 2035 */
+ memset(&stoptm,0,sizeof(struct tm));
+ stoptm.tm_year = 135;
+ stoptm.tm_mday = 31;
+ stoptm.tm_mon = 11;
- if (!wth) {
+ stoptime = mktime(&stoptm);
+ }
+
+ nstime_set_unset(&block_start);
+
+ if (starttime > stoptime) {
+ fprintf(stderr, "editcap: start time is after the stop time\n");
+ exit(1);
+ }
+
+ if (split_packet_count > 0 && secs_per_block > 0) {
+ fprintf(stderr, "editcap: can't split on both packet count and time interval\n");
+ fprintf(stderr, "editcap: at the same time\n");
+ exit(1);
+ }
+ wth = wtap_open_offline(argv[optind], &err, &err_info, FALSE);
+
+ if (!wth) {
fprintf(stderr, "editcap: Can't open %s: %s\n", argv[optind],
wtap_strerror(err));
- exit(1);
+ switch (err) {
+
+ case WTAP_ERR_UNSUPPORTED:
+ case WTAP_ERR_UNSUPPORTED_ENCAP:
+ case WTAP_ERR_BAD_RECORD:
+ fprintf(stderr, "(%s)\n", err_info);
+ g_free(err_info);
+ break;
+ }
+ exit(2);
}
if (verbose) {
-
fprintf(stderr, "File %s is a %s capture file.\n", argv[optind],
- wtap_file_type_string(wtap_file_type(wth)));
-
+ wtap_file_type_string(wtap_file_type(wth)));
}
/*
if ((argc - optind) >= 2) {
- args.filename = argv[optind + 1];
if (out_frame_type == -2)
out_frame_type = wtap_file_encap(wth);
- snapshot_length = wtap_snapshot_length(wth);
- if (snapshot_length == 0) {
- /* Snapshot length of input file not known. */
- snapshot_length = WTAP_MAX_PACKET_SIZE;
+ for (i = optind + 2; i < argc; i++)
+ if (add_selection(argv[i]) == FALSE)
+ break;
+
+ if (dup_detect || dup_detect_by_time) {
+ for (i = 0; i < dup_window; i++) {
+ memset(&fd_hash[i].digest, 0, 16);
+ fd_hash[i].len = 0;
+ nstime_set_unset(&fd_hash[i].time);
+ }
}
- args.pdh = wtap_dump_open(argv[optind + 1], out_file_type,
- out_frame_type, wtap_snapshot_length(wth), &err);
- if (args.pdh == NULL) {
- fprintf(stderr, "editcap: Can't open or create %s: %s\n", argv[optind+1],
- wtap_strerror(err));
- exit(1);
+ while (wtap_read(wth, &err, &err_info, &data_offset)) {
+ phdr = wtap_phdr(wth);
+ buf = wtap_buf_ptr(wth);
+
+ if (nstime_is_unset(&block_start)) { /* should only be the first packet */
+ block_start.secs = phdr->ts.secs;
+ block_start.nsecs = phdr->ts.nsecs;
+
+ if (split_packet_count > 0 || secs_per_block > 0) {
+ if (!fileset_extract_prefix_suffix(argv[optind+1], &fprefix, &fsuffix))
+ exit(2);
+
+ filename = fileset_get_filename_by_pattern(block_cnt++, &phdr->ts, fprefix, fsuffix);
+ } else
+ filename = g_strdup(argv[optind+1]);
+
+ pdh = wtap_dump_open(filename, out_file_type,
+ out_frame_type, wtap_snapshot_length(wth),
+ FALSE /* compressed */, &err);
+ if (pdh == NULL) {
+ fprintf(stderr, "editcap: Can't open or create %s: %s\n", filename,
+ wtap_strerror(err));
+ exit(2);
+ }
+ }
+
+ g_assert(filename);
+
+ if (secs_per_block > 0) {
+ while ((phdr->ts.secs - block_start.secs > secs_per_block) ||
+ (phdr->ts.secs - block_start.secs == secs_per_block &&
+ phdr->ts.nsecs >= block_start.nsecs )) { /* time for the next file */
+
+ if (!wtap_dump_close(pdh, &err)) {
+ fprintf(stderr, "editcap: Error writing to %s: %s\n", filename,
+ wtap_strerror(err));
+ exit(2);
+ }
+ block_start.secs = block_start.secs + secs_per_block; /* reset for next interval */
+ g_free(filename);
+ filename = fileset_get_filename_by_pattern(block_cnt++, &phdr->ts, fprefix, fsuffix);
+ g_assert(filename);
+
+ if (verbose) {
+ fprintf(stderr, "Continuing writing in file %s\n", filename);
+ }
+
+ pdh = wtap_dump_open(filename, out_file_type,
+ out_frame_type, wtap_snapshot_length(wth), FALSE /* compressed */, &err);
+
+ if (pdh == NULL) {
+ fprintf(stderr, "editcap: Can't open or create %s: %s\n", filename,
+ wtap_strerror(err));
+ exit(2);
+ }
+ }
+ }
+
+ if (split_packet_count > 0) {
+
+ /* time for the next file? */
+ if (written_count > 0 &&
+ written_count % split_packet_count == 0) {
+ if (!wtap_dump_close(pdh, &err)) {
+ fprintf(stderr, "editcap: Error writing to %s: %s\n", filename,
+ wtap_strerror(err));
+ exit(2);
+ }
+
+ g_free(filename);
+ filename = fileset_get_filename_by_pattern(block_cnt++, &phdr->ts, fprefix, fsuffix);
+ g_assert(filename);
+
+ if (verbose) {
+ fprintf(stderr, "Continuing writing in file %s\n", filename);
+ }
+
+ pdh = wtap_dump_open(filename, out_file_type,
+ out_frame_type, wtap_snapshot_length(wth), FALSE /* compressed */, &err);
+ if (pdh == NULL) {
+ fprintf(stderr, "editcap: Can't open or create %s: %s\n", filename,
+ wtap_strerror(err));
+ exit(2);
+ }
+ }
+ }
+
+ check_ts = check_timestamp(wth);
+
+ if ( ((check_startstop && check_ts) || (!check_startstop && !check_ts)) && ((!selected(count) && !keep_em) ||
+ (selected(count) && keep_em)) ) {
+
+ if (verbose && !dup_detect && !dup_detect_by_time)
+ printf("Packet: %u\n", count);
+
+ /* We simply write it, perhaps after truncating it; we could do other
+ things, like modify it. */
+
+ phdr = wtap_phdr(wth);
+
+ if (choplen < 0 && (phdr->caplen + choplen) > 0) {
+ snap_phdr = *phdr;
+ snap_phdr.caplen += choplen;
+ phdr = &snap_phdr;
+ }
+
+ if (choplen > 0 && phdr->caplen > (unsigned int) choplen) {
+ snap_phdr = *phdr;
+ snap_phdr.caplen -= choplen;
+ snap_phdr.len -= choplen;
+ buf += choplen;
+ phdr = &snap_phdr;
+ }
+
+ if (snaplen != 0 && phdr->caplen > snaplen) {
+ snap_phdr = *phdr;
+ snap_phdr.caplen = snaplen;
+ phdr = &snap_phdr;
+ }
+
+ /*
+ * Do we adjust timestamps to insure strict chronologically order?
+ */
+
+ if (do_strict_time_adjustment) {
+ if (previous_time.secs || previous_time.nsecs) {
+ if (!strict_time_adj.is_negative) {
+ nstime_t current;
+ nstime_t delta;
+
+ current.secs = phdr->ts.secs;
+ current.nsecs = phdr->ts.nsecs;
+
+ nstime_delta(&delta, ¤t, &previous_time);
+
+ if (delta.secs < 0 || delta.nsecs < 0)
+ {
+ /*
+ * A negative delta indicates that the current packet
+ * has an absolute timestamp less than the previous packet
+ * that it is being compared to. This is NOT a normal
+ * situation since trace files usually have packets in
+ * chronological order (oldest to newest).
+ */
+ /* printf("++out of order, need to adjust this packet!\n"); */
+ snap_phdr = *phdr;
+ snap_phdr.ts.secs = previous_time.secs + strict_time_adj.tv.tv_sec;
+ snap_phdr.ts.nsecs = previous_time.nsecs;
+ if (snap_phdr.ts.nsecs + strict_time_adj.tv.tv_usec * 1000 > ONE_MILLION * 1000) {
+ /* carry */
+ snap_phdr.ts.secs++;
+ snap_phdr.ts.nsecs += (strict_time_adj.tv.tv_usec - ONE_MILLION) * 1000;
+ } else {
+ snap_phdr.ts.nsecs += strict_time_adj.tv.tv_usec * 1000;
+ }
+ phdr = &snap_phdr;
+ }
+ } else {
+ /*
+ * A negative strict time adjustment is requested.
+ * Unconditionally set each timestamp to previous
+ * packet's timestamp plus delta.
+ */
+ snap_phdr = *phdr;
+ snap_phdr.ts.secs = previous_time.secs + strict_time_adj.tv.tv_sec;
+ snap_phdr.ts.nsecs = previous_time.nsecs;
+ if (snap_phdr.ts.nsecs + strict_time_adj.tv.tv_usec * 1000 > ONE_MILLION * 1000) {
+ /* carry */
+ snap_phdr.ts.secs++;
+ snap_phdr.ts.nsecs += (strict_time_adj.tv.tv_usec - ONE_MILLION) * 1000;
+ } else {
+ snap_phdr.ts.nsecs += strict_time_adj.tv.tv_usec * 1000;
+ }
+ phdr = &snap_phdr;
+ }
+ }
+ previous_time.secs = phdr->ts.secs;
+ previous_time.nsecs = phdr->ts.nsecs;
+ }
+
+ /* assume that if the frame's tv_sec is 0, then
+ * the timestamp isn't supported */
+ if (phdr->ts.secs > 0 && time_adj.tv.tv_sec != 0) {
+ snap_phdr = *phdr;
+ if (time_adj.is_negative)
+ snap_phdr.ts.secs -= time_adj.tv.tv_sec;
+ else
+ snap_phdr.ts.secs += time_adj.tv.tv_sec;
+ phdr = &snap_phdr;
+ }
+
+ /* assume that if the frame's tv_sec is 0, then
+ * the timestamp isn't supported */
+ if (phdr->ts.secs > 0 && time_adj.tv.tv_usec != 0) {
+ snap_phdr = *phdr;
+ if (time_adj.is_negative) { /* subtract */
+ if (snap_phdr.ts.nsecs/1000 < time_adj.tv.tv_usec) { /* borrow */
+ snap_phdr.ts.secs--;
+ snap_phdr.ts.nsecs += ONE_MILLION * 1000;
+ }
+ snap_phdr.ts.nsecs -= time_adj.tv.tv_usec * 1000;
+ } else { /* add */
+ if (snap_phdr.ts.nsecs + time_adj.tv.tv_usec * 1000 > ONE_MILLION * 1000) {
+ /* carry */
+ snap_phdr.ts.secs++;
+ snap_phdr.ts.nsecs += (time_adj.tv.tv_usec - ONE_MILLION) * 1000;
+ } else {
+ snap_phdr.ts.nsecs += time_adj.tv.tv_usec * 1000;
+ }
+ }
+ phdr = &snap_phdr;
+ }
+ /* suppress duplicates by packet window */
+ if (dup_detect) {
+ if (is_duplicate(buf, phdr->caplen)) {
+ if (verbose) {
+ fprintf(stdout, "Skipped: %u, Len: %u, MD5 Hash: ", count, phdr->caplen);
+ for (i = 0; i < 16; i++) {
+ fprintf(stdout, "%02x", (unsigned char)fd_hash[cur_dup_entry].digest[i]);
+ }
+ fprintf(stdout, "\n");
+ }
+ duplicate_count++;
+ count++;
+ continue;
+ } else {
+ if (verbose) {
+ fprintf(stdout, "Packet: %u, Len: %u, MD5 Hash: ", count, phdr->caplen);
+ for (i = 0; i < 16; i++) {
+ fprintf(stdout, "%02x", (unsigned char)fd_hash[cur_dup_entry].digest[i]);
+ }
+ fprintf(stdout, "\n");
+ }
+ }
+ }
+
+ /* suppress duplicates by time window */
+ if (dup_detect_by_time) {
+ nstime_t current;
+
+ current.secs = phdr->ts.secs;
+ current.nsecs = phdr->ts.nsecs;
+
+ if (is_duplicate_rel_time(buf, phdr->caplen, ¤t)) {
+ if (verbose) {
+ fprintf(stdout, "Skipped: %u, Len: %u, MD5 Hash: ", count, phdr->caplen);
+ for (i = 0; i < 16; i++) {
+ fprintf(stdout, "%02x", (unsigned char)fd_hash[cur_dup_entry].digest[i]);
+ }
+ fprintf(stdout, "\n");
+ }
+ duplicate_count++;
+ count++;
+ continue;
+ } else {
+ if (verbose) {
+ fprintf(stdout, "Packet: %u, Len: %u, MD5 Hash: ", count, phdr->caplen);
+ for (i = 0; i < 16; i++) {
+ fprintf(stdout, "%02x", (unsigned char)fd_hash[cur_dup_entry].digest[i]);
+ }
+ fprintf(stdout, "\n");
+ }
+ }
+ }
+
+ /* Random error mutation */
+ if (err_prob > 0.0) {
+ int real_data_start = 0;
+ /* Protect non-protocol data */
+ if (wtap_file_type(wth) == WTAP_FILE_CATAPULT_DCT2000) {
+ real_data_start = find_dct2000_real_data(buf);
+ }
+ for (i = real_data_start; i < (int) phdr->caplen; i++) {
+ if (rand() <= err_prob * RAND_MAX) {
+ err_type = rand() / (RAND_MAX / ERR_WT_TOTAL + 1);
+
+ if (err_type < ERR_WT_BIT) {
+ buf[i] ^= 1 << (rand() / (RAND_MAX / 8 + 1));
+ err_type = ERR_WT_TOTAL;
+ } else {
+ err_type -= ERR_WT_BYTE;
+ }
+
+ if (err_type < ERR_WT_BYTE) {
+ buf[i] = rand() / (RAND_MAX / 255 + 1);
+ err_type = ERR_WT_TOTAL;
+ } else {
+ err_type -= ERR_WT_BYTE;
+ }
+
+ if (err_type < ERR_WT_ALNUM) {
+ buf[i] = ALNUM_CHARS[rand() / (RAND_MAX / ALNUM_LEN + 1)];
+ err_type = ERR_WT_TOTAL;
+ } else {
+ err_type -= ERR_WT_ALNUM;
+ }
+
+ if (err_type < ERR_WT_FMT) {
+ if ((unsigned int)i < phdr->caplen - 2)
+ strncpy((char*) &buf[i], "%s", 2);
+ err_type = ERR_WT_TOTAL;
+ } else {
+ err_type -= ERR_WT_FMT;
+ }
+
+ if (err_type < ERR_WT_AA) {
+ for (j = i; j < (int) phdr->caplen; j++) {
+ buf[j] = 0xAA;
+ }
+ i = phdr->caplen;
+ }
+ }
+ }
+ }
+
+ if (!wtap_dump(pdh, phdr, wtap_pseudoheader(wth), buf, &err)) {
+ fprintf(stderr, "editcap: Error writing to %s: %s\n",
+ filename, wtap_strerror(err));
+ exit(2);
+ }
+ written_count++;
+ }
+ count++;
}
- for (i = optind + 2; i < argc; i++)
- add_selection(argv[i]);
+ g_free(fprefix);
+ g_free(fsuffix);
+
+ if (err != 0) {
+ /* Print a message noting that the read failed somewhere along the line. */
+ fprintf(stderr,
+ "editcap: An error occurred while reading \"%s\": %s.\n",
+ argv[optind], wtap_strerror(err));
+ switch (err) {
+
+ case WTAP_ERR_UNSUPPORTED:
+ case WTAP_ERR_UNSUPPORTED_ENCAP:
+ case WTAP_ERR_BAD_RECORD:
+ fprintf(stderr, "(%s)\n", err_info);
+ g_free(err_info);
+ break;
+ }
+ }
- wtap_loop(wth, 0, edit_callback, (char *)&args, &err);
+ if (!pdh) {
+ /* No valid packages found, open the outfile so we can write an empty header */
+ g_free (filename);
+ filename = g_strdup(argv[optind+1]);
+
+ pdh = wtap_dump_open(filename, out_file_type,
+ out_frame_type, wtap_snapshot_length(wth), FALSE /* compressed */, &err);
+ if (pdh == NULL) {
+ fprintf(stderr, "editcap: Can't open or create %s: %s\n", filename,
+ wtap_strerror(err));
+ exit(2);
+ }
+ }
- if (!wtap_dump_close(args.pdh, &err)) {
+ if (!wtap_dump_close(pdh, &err)) {
- fprintf(stderr, "editcap: Error writing to %s: %s\n", argv[2],
- wtap_strerror(err));
- exit(1);
+ fprintf(stderr, "editcap: Error writing to %s: %s\n", filename,
+ wtap_strerror(err));
+ exit(2);
}
+ g_free(filename);
+ }
+
+ if (dup_detect) {
+ fprintf(stdout, "%u packet%s seen, %u packet%s skipped with duplicate window of %u packets.\n",
+ count - 1, plurality(count - 1, "", "s"),
+ duplicate_count, plurality(duplicate_count, "", "s"), dup_window);
+ } else if (dup_detect_by_time) {
+ fprintf(stdout, "%u packet%s seen, %u packet%s skipped with duplicate time window equal to or less than %ld.%09ld seconds.\n",
+ count - 1, plurality(count - 1, "", "s"),
+ duplicate_count, plurality(duplicate_count, "", "s"),
+ (long)relative_time_window.secs, (long int)relative_time_window.nsecs);
}
return 0;
}
-
+
+/* Skip meta-information read from file to return offset of real
+ protocol data */
+static int find_dct2000_real_data(guint8 *buf)
+{
+ int n=0;
+
+ for (n=0; buf[n] != '\0'; n++); /* Context name */
+ n++;
+ n++; /* Context port number */
+ for (; buf[n] != '\0'; n++); /* Timestamp */
+ n++;
+ for (; buf[n] != '\0'; n++); /* Protocol name */
+ n++;
+ for (; buf[n] != '\0'; n++); /* Variant number (as string) */
+ n++;
+ for (; buf[n] != '\0'; n++); /* Outhdr (as string) */
+ n++;
+ n += 2; /* Direction & encap */
+
+ return n;
+}
git.samba.org / obnox / wireshark / wip.git / blobdiff