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wireshark/editcap.c
Jeff Morriss 83f9ecf96f Move privileges.c and unicode-utils.c from epan to wsutil (so things like 
capinfos and dumpcap don't need to depend on libwireshark nor directly pull
in those modules).  Because capinfos and editcap were only being linked with
privileges.c if we had plugins, this allows those programs to be linked when
someone is compiling --without-plugins.

svn path=/trunk/; revision=25640
2008-06-30 17:16:29 +00:00

924 lines
25 KiB
C
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/* Edit capture files. We can delete packets, adjust timestamps, or
* simply convert from one format to another format.
*
* $Id$
*
* Originally written by Richard Sharpe.
* Improved by Guy Harris.
* Further improved by Richard Sharpe.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#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
#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 <wsutil/privileges.h>
#include "epan/nstime.h"
#include "svnversion.h"
/*
* Some globals so we can pass things to various routines
*/
struct select_item {
int inclusive;
int first, second;
};
/*
* 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;
};
#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 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;
static int find_dct2000_real_data(guint8 *buf);
/* Add a selection item, a simple parser for now */
static gboolean
add_selection(char *sel)
{
char *locn;
char *next;
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);
if ((locn = strchr(sel, '-')) == NULL) { /* No dash, so a single number? */
printf("Not inclusive ...");
selectfrm[max_selected].inclusive = 0;
selectfrm[max_selected].first = atoi(sel);
printf(" %i\n", selectfrm[max_selected].first);
}
else {
printf("Inclusive ...");
next = locn + 1;
selectfrm[max_selected].inclusive = 1;
selectfrm[max_selected].first = atoi(sel);
selectfrm[max_selected].second = atoi(next);
printf(" %i, %i\n", selectfrm[max_selected].first, selectfrm[max_selected].second);
}
return(TRUE);
}
/* Was the packet selected? */
static int
selected(int recno)
{
int i = 0;
for (i = 0; i<= max_selected; i++) {
if (selectfrm[i].inclusive) {
if (selectfrm[i].first <= recno && selectfrm[i].second >= recno)
return 1;
}
else {
if (recno == selectfrm[i].first)
return 1;
}
}
return 0;
}
/* is the packet in the selected timeframe */
static gboolean
check_timestamp(wtap *wth)
{
struct wtap_pkthdr* pkthdr = wtap_phdr(wth);
return ( pkthdr->ts.secs >= starttime ) && ( pkthdr->ts.secs <= stoptime );
}
static void
set_time_adjustment(char *optarg)
{
char *frac, *end;
long val;
int frac_digits;
if (!optarg)
return;
/* skip leading whitespace */
while (*optarg == ' ' || *optarg == '\t') {
optarg++;
}
/* check for a negative adjustment */
if (*optarg == '-') {
time_adj.is_negative = 1;
optarg++;
}
/* collect whole number of seconds, if any */
if (*optarg == '.') { /* only fractional (i.e., .5 is ok) */
val = 0;
frac = optarg;
} else {
val = strtol(optarg, &frac, 10);
if (frac == NULL || frac == optarg || val == LONG_MIN || val == LONG_MAX) {
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\" isn't a valid time adjustment\n",
optarg);
exit(1);
}
}
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 (*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);
exit(1);
}
}
else {
return; /* no fractional digits */
}
/* 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 gboolean
is_duplicate(guint8* fd, guint32 len) {
int 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;
}
}
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, " based on uniform packet counts \n");
fprintf(stderr, " with a maximum of <packets per file> each\n");
fprintf(stderr, " -i <seconds per file> split the packet output to different files,\n");
fprintf(stderr, " based on uniform time intervals \n");
fprintf(stderr, " with a maximum of <seconds 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));
}
}
/*
* 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;
}
int
main(int argc, char *argv[])
{
wtap *wth;
int i, j, err;
gchar *err_info;
extern char *optarg;
extern int optind;
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;
size_t filenamelen = 0;
gboolean check_ts;
int secs_per_block = 0;
int block_cnt = 0;
nstime_t block_start;
#ifdef HAVE_PLUGINS
char* init_progfile_dir_error;
#endif
/*
* Get credential information for later use.
*/
get_credential_info();
#ifdef HAVE_PLUGINS
/* 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 */
while ((opt = getopt(argc, argv, "A:B:c:C:dE:F:hrs:i:t:T:v")) !=-1) {
switch (opt) {
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\" isn't a valid capture file type\n\n",
optarg);
list_capture_types();
exit(1);
}
break;
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':
keep_em = !keep_em; /* Just invert */
break;
case 's':
snaplen = strtol(optarg, &p, 10);
if (p == optarg || *p != '\0') {
fprintf(stderr, "editcap: \"%s\" isn't a valid snapshot length\n",
optarg);
exit(1);
}
break;
case 't':
set_time_adjustment(optarg);
break;
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);
nstime_set_unset(&block_start);
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;
}
}
}
#ifdef DEBUG
printf("Optind = %i, argc = %i\n", optind, argc);
#endif
if ((argc - optind) < 1) {
usage();
exit(1);
}
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;
stoptime = mktime(&stoptm);
}
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));
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 (verbose) {
fprintf(stderr, "File %s is a %s capture file.\n", argv[optind],
wtap_file_type_string(wtap_file_type(wth)));
}
/*
* Now, process the rest, if any ... we only write if there is an extra
* argument or so ...
*/
if ((argc - optind) >= 2) {
if (out_frame_type == -2)
out_frame_type = wtap_file_encap(wth);
if (split_packet_count > 0) {
filenamelen = strlen(argv[optind+1]) + 20;
filename = (char *) g_malloc(filenamelen);
if (!filename) {
exit(5);
}
g_snprintf(filename, filenamelen, "%s-%05d", argv[optind+1], 0);
} else {
if (secs_per_block > 0) {
filenamelen = strlen(argv[optind+1]) + 7;
filename = (char *) g_malloc(filenamelen);
if (!filename) {
exit(5);
}
g_snprintf(filename, filenamelen, "%s-%05d", argv[optind+1], block_cnt);
}
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", filename,
wtap_strerror(err));
exit(1);
}
for (i = optind + 2; i < argc; i++)
if (add_selection(argv[i]) == FALSE)
break;
while (wtap_read(wth, &err, &err_info, &data_offset)) {
if (secs_per_block > 0) {
phdr = wtap_phdr(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;
}
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(1);
}
block_start.secs = block_start.secs + secs_per_block; /* reset for next interval */
g_snprintf(filename, filenamelen, "%s-%05d",argv[optind+1], ++block_cnt);
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);
}
}
}
if (split_packet_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(1);
}
g_snprintf(filename, filenamelen, "%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;
}
}
/* Random error mutation */
if (err_prob > 0.0) {
int real_data_start = 0;
buf = wtap_buf_ptr(wth);
/* 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), 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);
g_free(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;
}
/* 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;
}
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