-/* 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 1.18 2001/10/04 08:30:33 guy 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>
-#endif
-
-#include <string.h>
#include "wtap.h"
#ifdef NEED_GETOPT_H
#include "getopt.h"
#endif
+#ifdef _WIN32
+#include <process.h> /* getpid */
+#endif
+
+#ifdef NEED_STRPTIME_H
+# include "strptime.h"
+#endif
+
+#include "epan/crypt/crypt-md5.h"
+#include "epan/plugins.h"
+#include "epan/report_err.h"
+#include "epan/filesystem.h"
+
+#include "svnversion.h"
+
/*
* Some globals so we can pass things to various routines
*/
int inclusive;
int first, second;
-} select_item;
+};
+
+
+/*
+ * Duplicate frame detection
+ */
+typedef struct _fd_hash_t {
+ md5_byte_t digest[16];
+ guint32 len;
+} fd_hash_t;
+
+#define DUP_DEPTH 5
+fd_hash_t fd_hash[DUP_DEPTH];
+int cur_dup = 0;
#define ONE_MILLION 1000000
+/* 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 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;
/* Add a selection item, a simple parser for now */
-
-void add_selection(char *sel)
+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;
}
-/* An argument to the callback routine */
-
-typedef struct {
- char *filename;
- wtap_dumper *pdh;
-} callback_arg;
-
-/*
- *The callback routine that is called for each frame in the input file
- */
-
-static void
-edit_callback(u_char *user, const struct wtap_pkthdr *phdr, long offset,
- union wtap_pseudo_header *pseudo_header, const u_char *buf)
+/* is the packet in the selected timeframe */
+static gboolean
+check_timestamp(wtap *wth)
{
- 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);
-
- /* We simply write it, perhaps after truncating it; we could do other
- things, like modify it. */
-
- if (snaplen != 0 && phdr->caplen > snaplen) {
- snap_phdr = *phdr;
- snap_phdr.caplen = snaplen;
- phdr = &snap_phdr;
- }
-
- /* 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;
- }
-
- /* 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;
- }
- }
- phdr = &snap_phdr;
- }
-
- if (!wtap_dump(argp->pdh, phdr, pseudo_header, buf, &err)) {
-
- fprintf(stderr, "editcap: Error writing to %s: %s\n", argp->filename,
- wtap_strerror(err));
- exit(1);
-
- }
-
- }
-
- count++;
-
+ static int i = 0;
+ struct wtap_pkthdr* pkthdr = wtap_phdr(wth);
+
+ if (!((i++)%250))
+ printf("== %d starttime=%lu stoptime=%lu ts=%lu\n",i,
+ (unsigned long)starttime,
+ (unsigned long)stoptime,
+ (unsigned long)pkthdr->ts.secs);
+ return ( pkthdr->ts.secs >= starttime ) && ( pkthdr->ts.secs <= stoptime );
}
static void
} 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",
+ fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
optarg);
exit(1);
}
if (val < 0) { /* implies '--' since we caught '-' above */
- fprintf(stderr, "editcap: \"%s\" is not a valid time adjustment\n",
+ fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
optarg);
exit(1);
}
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",
+ fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
optarg);
exit(1);
}
time_adj.tv.tv_usec = val;
}
-void usage()
-{
+static gboolean
+is_duplicate(guint8* fd, guint32 len) {
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));
+ md5_state_t ms;
+
+ cur_dup++;
+ if (cur_dup >= DUP_DEPTH)
+ cur_dup = 0;
+
+ /* Calculate our digest */
+ md5_init(&ms);
+ md5_append(&ms, fd, len);
+ md5_finish(&ms, fd_hash[cur_dup].digest);
+
+ fd_hash[cur_dup].len = len;
+
+ /* Look for duplicates */
+ for (i = 0; i < DUP_DEPTH; i++) {
+ if (i == cur_dup)
+ continue;
+
+ if (fd_hash[i].len == fd_hash[cur_dup].len &&
+ memcmp(fd_hash[i].digest, fd_hash[cur_dup].digest, 16) == 0) {
+ return TRUE;
+ }
}
- 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");
+
+ return FALSE;
+}
+
+static void usage(void)
+{
+ fprintf(stderr, "Editcap %s"
+#ifdef SVNVERSION
+ " (" SVNVERSION ")"
+#endif
+ "\n", VERSION);
+ fprintf(stderr, "Edit and/or translate the format of capture files.\n");
+ fprintf(stderr, "See http://www.wireshark.org for more information.\n");
+ fprintf(stderr, "\n");
+ fprintf(stderr, "Usage: editcap [options] ... <infile> <outfile> [ <packet#>[-<packet#>] ... ]\n");
+ fprintf(stderr, "\n");
+ fprintf(stderr, "A single packet or a range of packets can be selected.\n");
+ fprintf(stderr, "\n");
+ fprintf(stderr, "Packet selection:\n");
+ fprintf(stderr, " -r keep the selected packets, default is to delete them\n");
+ fprintf(stderr, " -A <start time> don't output packets whose timestamp is before the\n");
+ fprintf(stderr, " given time (format as YYYY-MM-DD hh:mm:ss)\n");
+ fprintf(stderr, " -B <stop time> don't output packets whose timestamp is after the\n");
+ fprintf(stderr, " given time (format as YYYY-MM-DD hh:mm:ss)\n");
+ fprintf(stderr, " -d remove duplicate packets\n");
+ fprintf(stderr, "\n");
+ fprintf(stderr, "Packet manipulation:\n");
+ fprintf(stderr, " -s <snaplen> truncate each packet to max. <snaplen> bytes of data\n");
+ fprintf(stderr, " -C <choplen> chop each packet at the end by <choplen> bytes\n");
+ fprintf(stderr, " -t <time adjustment> adjust the timestamp of each packet,\n");
+ fprintf(stderr, " <time adjustment> is in relative seconds (e.g. -0.5)\n");
+ fprintf(stderr, " -E <error probability> set the probability (between 0.0 and 1.0 incl.)\n");
+ fprintf(stderr, " that a particular packet byte will be randomly changed\n");
+ fprintf(stderr, "\n");
+ fprintf(stderr, "Output File(s):\n");
+ fprintf(stderr, " -c <packets per file> split the packet output to different files,\n");
+ fprintf(stderr, " with a maximum of <packets per file> each\n");
+ fprintf(stderr, " -F <capture type> set the output file type, default is libpcap\n");
+ fprintf(stderr, " an empty \"-F\" option will list the file types\n");
+ fprintf(stderr, " -T <encap type> set the output file encapsulation type,\n");
+ fprintf(stderr, " default is the same as the input file\n");
+ fprintf(stderr, " an empty \"-T\" option will list the encapsulation types\n");
+ fprintf(stderr, "\n");
+ fprintf(stderr, "Miscellaneous:\n");
+ fprintf(stderr, " -h display this help and exit\n");
+ fprintf(stderr, " -v verbose output\n");
+ fprintf(stderr, "\n");
+}
+
+static void list_capture_types(void) {
+ int i;
+
+ fprintf(stderr, "editcap: The available capture file types for \"F\":\n");
+ for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
+ if (wtap_dump_can_open(i))
+ fprintf(stderr, " %s - %s\n",
+ wtap_file_type_short_string(i), wtap_file_type_string(i));
+ }
+}
+
+static void list_encap_types(void) {
+ int i;
+ const char *string;
+
+ fprintf(stderr, "editcap: The available encapsulation types for \"T\":\n");
+ for (i = 0; i < WTAP_NUM_ENCAP_TYPES; i++) {
+ string = wtap_encap_short_string(i);
+ if (string != NULL)
+ fprintf(stderr, " %s - %s\n",
+ string, wtap_encap_string(i));
+ }
+}
+
+static void
+failure_message(const char *msg_format, va_list ap)
+{
+ fprintf(stderr, "editcap: ");
+ vfprintf(stderr, msg_format, ap);
+ fprintf(stderr, "\n");
}
int main(int argc, char *argv[])
{
wtap *wth;
- int i, err;
- callback_arg args;
+ int i, j, err;
+ gchar *err_info;
extern char *optarg;
extern int optind;
- char opt;
+ int opt;
char *p;
+ unsigned int snaplen = 0; /* No limit */
+ unsigned int choplen = 0; /* No chop */
+ wtap_dumper *pdh;
+ int count = 1;
+ 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;
+ gboolean check_ts;
+#ifdef HAVE_PLUGINS
+ char* init_progfile_dir_error;
+
+ /* Register wiretap plugins */
+ if ((init_progfile_dir_error = init_progfile_dir(argv[0]))) {
+ 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);
+ init_plugins();
+ }
+#endif
- /* Process the options first */
-
- while ((opt = getopt(argc, argv, "T:F:rvs:t:h")) != EOF) {
+ /* Process the options */
+ while ((opt = getopt(argc, argv, "A:B:c:C:dE:F:hrs:t:T:v")) !=-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",
+ 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",
+ 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;
+ for (i = 0; i < DUP_DEPTH; i++) {
+ memset(&fd_hash[i].digest, 0, 16);
+ fd_hash[i].len = 0;
+ }
+ break;
+
+ case '?': /* Bad options if GNU getopt */
+ switch(optopt) {
+ case'F':
+ list_capture_types();
+ break;
+ case'T':
+ list_encap_types();
+ break;
+ default:
+ usage();
+ }
+ exit(1);
+ break;
+
+ case 'h':
+ usage();
+ 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",
+ fprintf(stderr, "editcap: \"%s\" isn't a valid snapshot length\n",
optarg);
exit(1);
}
set_time_adjustment(optarg);
break;
- case 'h':
- 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 '?': /* Bad options if GNU getopt */
- usage();
- exit(1);
+ case 'v':
+ verbose = !verbose; /* Just invert */
+ 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);
+ printf("=START=> given='%s' stoptime=%lu\n",optarg,(unsigned long)starttime);
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);
+ printf("=STOP=> given='%s' stoptime=%lu\n",optarg,(unsigned long)stoptime);
+ break;
+ }
}
}
}
- 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);
+ printf("=STOP=NEVER=> stoptime=%lu\n",(unsigned long)stoptime);
+ }
+
+ if (starttime > stoptime) {
+ fprintf(stderr, "editcap: start time is after the stop time\n");
+ exit(1);
+ }
+ printf("==> stoptime=%lu stoptime=%lu\n",(unsigned long)starttime,(unsigned long)stoptime);
+ 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));
+ 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(1);
}
if ((argc - optind) >= 2) {
- args.filename = argv[optind + 1];
if (out_frame_type == -2)
out_frame_type = wtap_file_encap(wth);
- args.pdh = wtap_dump_open(argv[optind + 1], out_file_type,
- out_frame_type, wtap_snapshot_length(wth), &err);
- if (args.pdh == NULL) {
+ if (split_packet_count > 0) {
+ filename = (char *) malloc(strlen(argv[optind+1]) + 20);
+ if (!filename) {
+ exit(5);
+ }
+ sprintf(filename, "%s-%05d", argv[optind+1], 0);
+ } else {
+ filename = 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", argv[optind+1],
+ fprintf(stderr, "editcap: Can't open or create %s: %s\n", filename,
wtap_strerror(err));
exit(1);
}
for (i = optind + 2; i < argc; i++)
- add_selection(argv[i]);
+ if (add_selection(argv[i]) == FALSE)
+ break;
+
+ while (wtap_read(wth, &err, &err_info, &data_offset)) {
- wtap_loop(wth, 0, edit_callback, (char *)&args, &err);
+ if (split_packet_count > 0 && (written_count % split_packet_count == 0)) {
+ if (!wtap_dump_close(pdh, &err)) {
- if (!wtap_dump_close(args.pdh, &err)) {
+ fprintf(stderr, "editcap: Error writing to %s: %s\n", filename,
+ wtap_strerror(err));
+ exit(1);
+ }
- fprintf(stderr, "editcap: Error writing to %s: %s\n", argv[2],
+ sprintf(filename, "%s-%05d",argv[optind+1], count / split_packet_count);
+
+ 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(1);
+
+ }
+ }
+
+ check_ts = check_timestamp(wth);
+
+ if ( ((check_startstop && check_ts) || (!check_startstop && !check_ts)) && ((!selected(count) && !keep_em) ||
+ (selected(count) && keep_em)) ) {
+
+ if (verbose)
+ 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) {
+ snap_phdr = *phdr;
+ snap_phdr.caplen -= choplen;
+ phdr = &snap_phdr;
+ }
+
+ if (snaplen != 0 && phdr->caplen > snaplen) {
+ snap_phdr = *phdr;
+ snap_phdr.caplen = snaplen;
+ 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_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;
+ }
+
+ if (dup_detect) {
+ buf = wtap_buf_ptr(wth);
+ if (is_duplicate(buf, phdr->caplen)) {
+ if (verbose)
+ printf("Skipping duplicate: %u\n", count);
+ count++;
+ continue;
+ }
+ }
+
+ if (err_prob > 0.0) {
+ buf = wtap_buf_ptr(wth);
+ for (i = 0; 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)
+ strcpy((char*) &buf[i], "%s");
+ 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), wtap_buf_ptr(wth),
+ &err)) {
+
+ fprintf(stderr, "editcap: Error writing to %s: %s\n",
+ filename, wtap_strerror(err));
+ exit(1);
+
+ }
+
+ written_count++;
+
+ }
+
+ count++;
+
+ }
+
+ 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);
+ break;
+ }
+ }
+
+ if (!wtap_dump_close(pdh, &err)) {
+
+ fprintf(stderr, "editcap: Error writing to %s: %s\n", filename,
wtap_strerror(err));
exit(1);
return 0;
}
-
+
git.samba.org / obnox / wireshark / wip.git / blobdiff