3006ffa615
Avoid printing a noisy "option requires an argument" error when using '-T' and '-F' as documented. Fix warning that started showing on macOS with CMake 3.9.4 about CMP0058 since v2.5.0rc0-1180-g799f4f0e14. Change-Id: Ie0cc352c6b0b2724997e7fe6b49fd5b1f02d1e07 Reviewed-on: https://code.wireshark.org/review/24404 Petri-Dish: Peter Wu <peter@lekensteyn.nl> Reviewed-by: Ahmad Fatoum <ahmad@a3f.at> Tested-by: Petri Dish Buildbot Reviewed-by: Gerald Combs <gerald@wireshark.org>
1991 lines
72 KiB
C
1991 lines
72 KiB
C
/* editcap.c
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* Edit capture files. We can delete packets, adjust timestamps, or
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* simply convert from one format to another format.
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*
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* Originally written by Richard Sharpe.
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* Improved by Guy Harris.
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* Further improved by Richard Sharpe.
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*
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* Copyright 2013, Richard Sharpe <realrichardsharpe[AT]gmail.com>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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/*
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* Just make sure we include the prototype for strptime as well
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* (needed for glibc 2.2) but make sure we do this only if not
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* yet defined.
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*/
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#ifndef __USE_XOPEN
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# define __USE_XOPEN
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#endif
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#include <time.h>
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#include <glib.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_GETOPT_H
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#include <getopt.h>
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#endif
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#include <wiretap/wtap.h>
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#include "epan/etypes.h"
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#ifndef HAVE_GETOPT_LONG
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#include "wsutil/wsgetopt.h"
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#endif
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#ifdef _WIN32
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#include <wsutil/unicode-utils.h>
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#include <process.h> /* getpid */
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#include <winsock2.h>
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#endif
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#ifndef HAVE_STRPTIME
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# include "wsutil/strptime.h"
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#endif
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#include <wsutil/crash_info.h>
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#include <wsutil/clopts_common.h>
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#include <wsutil/cmdarg_err.h>
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#include <wsutil/filesystem.h>
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#include <wsutil/file_util.h>
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#include <wsutil/wsgcrypt.h>
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#include <wsutil/plugins.h>
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#include <wsutil/privileges.h>
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#include <wsutil/report_message.h>
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#include <wsutil/strnatcmp.h>
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#include <wsutil/str_util.h>
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#include <version_info.h>
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#include <wsutil/pint.h>
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#include <wsutil/strtoi.h>
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#include <wiretap/wtap_opttypes.h>
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#include <wiretap/pcapng.h>
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#include "ui/failure_message.h"
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#include "ringbuffer.h" /* For RINGBUFFER_MAX_NUM_FILES */
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#define INVALID_OPTION 1
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#define INVALID_FILE 2
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#define CANT_EXTRACT_PREFIX 2
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#define WRITE_ERROR 2
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#define DUMP_ERROR 2
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/*
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* Some globals so we can pass things to various routines
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*/
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struct select_item {
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gboolean inclusive;
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guint first, second;
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};
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/*
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* Duplicate frame detection
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*/
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typedef struct _fd_hash_t {
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guint8 digest[16];
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guint32 len;
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nstime_t frame_time;
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} fd_hash_t;
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#define DEFAULT_DUP_DEPTH 5 /* Used with -d */
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#define MAX_DUP_DEPTH 1000000 /* the maximum window (and actual size of fd_hash[]) for de-duplication */
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static fd_hash_t fd_hash[MAX_DUP_DEPTH];
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static int dup_window = DEFAULT_DUP_DEPTH;
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static int cur_dup_entry = 0;
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static guint32 ignored_bytes = 0; /* Used with -I */
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#define ONE_BILLION 1000000000
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/* Weights of different errors we can introduce */
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/* We should probably make these command-line arguments */
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/* XXX - Should we add a bit-level error? */
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#define ERR_WT_BIT 5 /* Flip a random bit */
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#define ERR_WT_BYTE 5 /* Substitute a random byte */
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#define ERR_WT_ALNUM 5 /* Substitute a random character in [A-Za-z0-9] */
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#define ERR_WT_FMT 2 /* Substitute "%s" */
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#define ERR_WT_AA 1 /* Fill the remainder of the buffer with 0xAA */
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#define ERR_WT_TOTAL (ERR_WT_BIT + ERR_WT_BYTE + ERR_WT_ALNUM + ERR_WT_FMT + ERR_WT_AA)
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#define ALNUM_CHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
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#define ALNUM_LEN (sizeof(ALNUM_CHARS) - 1)
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struct time_adjustment {
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nstime_t tv;
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int is_negative;
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};
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typedef struct _chop_t {
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int len_begin;
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int off_begin_pos;
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int off_begin_neg;
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int len_end;
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int off_end_pos;
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int off_end_neg;
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} chop_t;
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/* Table of user comments */
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GTree *frames_user_comments = NULL;
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#define MAX_SELECTIONS 512
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static struct select_item selectfrm[MAX_SELECTIONS];
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static guint max_selected = 0;
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static int keep_em = 0;
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#ifdef PCAP_NG_DEFAULT
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static int out_file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_PCAPNG; /* default to pcapng */
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#else
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static int out_file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_PCAP; /* default to pcap */
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#endif
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static int out_frame_type = -2; /* Leave frame type alone */
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static int verbose = 0; /* Not so verbose */
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static struct time_adjustment time_adj = {{0, 0}, 0}; /* no adjustment */
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static nstime_t relative_time_window = {0, 0}; /* de-dup time window */
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static double err_prob = 0.0;
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static time_t starttime = 0;
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static time_t stoptime = 0;
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static gboolean check_startstop = FALSE;
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static gboolean rem_vlan = FALSE;
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static gboolean dup_detect = FALSE;
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static gboolean dup_detect_by_time = FALSE;
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static int do_strict_time_adjustment = FALSE;
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static struct time_adjustment strict_time_adj = {{0, 0}, 0}; /* strict time adjustment */
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static nstime_t previous_time = {0, 0}; /* previous time */
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static int find_dct2000_real_data(guint8 *buf);
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static void handle_chopping(chop_t chop, struct wtap_pkthdr *out_phdr,
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const struct wtap_pkthdr *in_phdr, guint8 **buf,
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gboolean adjlen);
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static gchar *
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abs_time_to_str_with_sec_resolution(const nstime_t *abs_time)
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{
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struct tm *tmp;
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gchar *buf = (gchar *)g_malloc(16);
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tmp = localtime(&abs_time->secs);
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if (tmp) {
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g_snprintf(buf, 16, "%d%02d%02d%02d%02d%02d",
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tmp->tm_year + 1900,
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tmp->tm_mon+1,
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tmp->tm_mday,
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tmp->tm_hour,
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tmp->tm_min,
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tmp->tm_sec);
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} else {
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buf[0] = '\0';
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}
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return buf;
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}
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static gchar *
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fileset_get_filename_by_pattern(guint idx, const struct wtap_pkthdr *phdr,
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gchar *fprefix, gchar *fsuffix)
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{
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gchar filenum[5+1];
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gchar *timestr;
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gchar *abs_str;
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g_snprintf(filenum, sizeof(filenum), "%05u", idx % RINGBUFFER_MAX_NUM_FILES);
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if (phdr->presence_flags & WTAP_HAS_TS) {
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timestr = abs_time_to_str_with_sec_resolution(&phdr->ts);
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abs_str = g_strconcat(fprefix, "_", filenum, "_", timestr, fsuffix, NULL);
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g_free(timestr);
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} else
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abs_str = g_strconcat(fprefix, "_", filenum, fsuffix, NULL);
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return abs_str;
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}
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static gboolean
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fileset_extract_prefix_suffix(const char *fname, gchar **fprefix, gchar **fsuffix)
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{
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char *pfx, *last_pathsep;
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gchar *save_file;
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save_file = g_strdup(fname);
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if (save_file == NULL) {
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fprintf(stderr, "editcap: Out of memory\n");
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return FALSE;
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}
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last_pathsep = strrchr(save_file, G_DIR_SEPARATOR);
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pfx = strrchr(save_file,'.');
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if (pfx != NULL && (last_pathsep == NULL || pfx > last_pathsep)) {
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/* The pathname has a "." in it, and it's in the last component
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* of the pathname (because there is either only one component,
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* i.e. last_pathsep is null as there are no path separators,
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* or the "." is after the path separator before the last
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* component.
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* Treat it as a separator between the rest of the file name and
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* the file name suffix, and arrange that the names given to the
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* ring buffer files have the specified suffix, i.e. put the
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* changing part of the name *before* the suffix. */
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pfx[0] = '\0';
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*fprefix = g_strdup(save_file);
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pfx[0] = '.'; /* restore capfile_name */
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*fsuffix = g_strdup(pfx);
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} else {
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/* Either there's no "." in the pathname, or it's in a directory
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* component, so the last component has no suffix. */
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*fprefix = g_strdup(save_file);
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*fsuffix = NULL;
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}
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g_free(save_file);
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return TRUE;
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}
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/* Add a selection item, a simple parser for now */
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static gboolean
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add_selection(char *sel, guint* max_selection)
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{
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char *locn;
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char *next;
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if (max_selected >= MAX_SELECTIONS) {
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/* Let the user know we stopped selecting */
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fprintf(stderr, "Out of room for packet selections.\n");
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return(FALSE);
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}
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if (verbose)
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fprintf(stderr, "Add_Selected: %s\n", sel);
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if ((locn = strchr(sel, '-')) == NULL) { /* No dash, so a single number? */
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if (verbose)
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fprintf(stderr, "Not inclusive ...");
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selectfrm[max_selected].inclusive = FALSE;
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selectfrm[max_selected].first = get_guint32(sel, "packet number");
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if (selectfrm[max_selected].first > *max_selection)
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*max_selection = selectfrm[max_selected].first;
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if (verbose)
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fprintf(stderr, " %u\n", selectfrm[max_selected].first);
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} else {
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if (verbose)
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fprintf(stderr, "Inclusive ...");
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*locn = '\0'; /* split the range */
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next = locn + 1;
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selectfrm[max_selected].inclusive = TRUE;
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selectfrm[max_selected].first = get_guint32(sel, "beginning of packet range");
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selectfrm[max_selected].second = get_guint32(next, "end of packet range");
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if (selectfrm[max_selected].second == 0)
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{
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/* Not a valid number, presume all */
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selectfrm[max_selected].second = *max_selection = G_MAXUINT;
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}
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else if (selectfrm[max_selected].second > *max_selection)
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*max_selection = selectfrm[max_selected].second;
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if (verbose)
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fprintf(stderr, " %u, %u\n", selectfrm[max_selected].first,
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selectfrm[max_selected].second);
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}
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max_selected++;
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return(TRUE);
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}
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/* Was the packet selected? */
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static int
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selected(guint recno)
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{
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guint i;
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for (i = 0; i < max_selected; i++) {
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if (selectfrm[i].inclusive) {
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if (selectfrm[i].first <= recno && selectfrm[i].second >= recno)
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return 1;
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} else {
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if (recno == selectfrm[i].first)
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return 1;
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}
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}
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return 0;
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}
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static gboolean
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set_time_adjustment(char *optarg_str_p)
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{
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char *frac, *end;
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long val;
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size_t frac_digits;
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if (!optarg_str_p)
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return TRUE;
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/* skip leading whitespace */
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while (*optarg_str_p == ' ' || *optarg_str_p == '\t')
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optarg_str_p++;
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/* check for a negative adjustment */
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if (*optarg_str_p == '-') {
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time_adj.is_negative = 1;
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optarg_str_p++;
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}
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/* collect whole number of seconds, if any */
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if (*optarg_str_p == '.') { /* only fractional (i.e., .5 is ok) */
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val = 0;
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frac = optarg_str_p;
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} else {
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val = strtol(optarg_str_p, &frac, 10);
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if (frac == NULL || frac == optarg_str_p
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|| val == LONG_MIN || val == LONG_MAX) {
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fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
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optarg_str_p);
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return FALSE;
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}
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if (val < 0) { /* implies '--' since we caught '-' above */
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fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
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optarg_str_p);
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return FALSE;
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}
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}
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time_adj.tv.secs = val;
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/* now collect the partial seconds, if any */
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if (*frac != '\0') { /* chars left, so get fractional part */
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val = strtol(&(frac[1]), &end, 10);
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/* if more than 9 fractional digits truncate to 9 */
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if ((end - &(frac[1])) > 9) {
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frac[10] = 't'; /* 't' for truncate */
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val = strtol(&(frac[1]), &end, 10);
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}
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if (*frac != '.' || end == NULL || end == frac || val < 0
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|| val > ONE_BILLION || val == LONG_MIN || val == LONG_MAX) {
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fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
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optarg_str_p);
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return FALSE;
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}
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} else {
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return TRUE; /* no fractional digits */
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}
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/* adjust fractional portion from fractional to numerator
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* e.g., in "1.5" from 5 to 500000000 since .5*10^9 = 500000000 */
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frac_digits = end - frac - 1; /* fractional digit count (remember '.') */
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while(frac_digits < 9) { /* this is frac of 10^9 */
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val *= 10;
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frac_digits++;
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}
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time_adj.tv.nsecs = (int)val;
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return TRUE;
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}
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static gboolean
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set_strict_time_adj(char *optarg_str_p)
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{
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char *frac, *end;
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long val;
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size_t frac_digits;
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if (!optarg_str_p)
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return TRUE;
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/* skip leading whitespace */
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while (*optarg_str_p == ' ' || *optarg_str_p == '\t')
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optarg_str_p++;
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/*
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* check for a negative adjustment
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* A negative strict adjustment value is a flag
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* to adjust all frames by the specifed delta time.
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*/
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if (*optarg_str_p == '-') {
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strict_time_adj.is_negative = 1;
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optarg_str_p++;
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}
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/* collect whole number of seconds, if any */
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if (*optarg_str_p == '.') { /* only fractional (i.e., .5 is ok) */
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val = 0;
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frac = optarg_str_p;
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} else {
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val = strtol(optarg_str_p, &frac, 10);
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if (frac == NULL || frac == optarg_str_p
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|| val == LONG_MIN || val == LONG_MAX) {
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fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
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optarg_str_p);
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return FALSE;
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}
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if (val < 0) { /* implies '--' since we caught '-' above */
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fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
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optarg_str_p);
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return FALSE;
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}
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}
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strict_time_adj.tv.secs = val;
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/* now collect the partial seconds, if any */
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if (*frac != '\0') { /* chars left, so get fractional part */
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val = strtol(&(frac[1]), &end, 10);
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/* if more than 9 fractional digits truncate to 9 */
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if ((end - &(frac[1])) > 9) {
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frac[10] = 't'; /* 't' for truncate */
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val = strtol(&(frac[1]), &end, 10);
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}
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if (*frac != '.' || end == NULL || end == frac || val < 0
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|| val > ONE_BILLION || val == LONG_MIN || val == LONG_MAX) {
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fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
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optarg_str_p);
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return FALSE;
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}
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} else {
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return TRUE; /* no fractional digits */
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}
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/* adjust fractional portion from fractional to numerator
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* e.g., in "1.5" from 5 to 500000000 since .5*10^9 = 500000000 */
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frac_digits = end - frac - 1; /* fractional digit count (remember '.') */
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while(frac_digits < 9) { /* this is frac of 10^9 */
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val *= 10;
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frac_digits++;
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}
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strict_time_adj.tv.nsecs = (int)val;
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return TRUE;
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}
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static gboolean
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set_rel_time(char *optarg_str_p)
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{
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char *frac, *end;
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long val;
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size_t frac_digits;
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if (!optarg_str_p)
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return TRUE;
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/* skip leading whitespace */
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while (*optarg_str_p == ' ' || *optarg_str_p == '\t')
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optarg_str_p++;
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/* ignore negative adjustment */
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|
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);
|
|
return FALSE;
|
|
}
|
|
if (val < 0) { /* implies '--' since we caught '-' above */
|
|
fprintf(stderr, "2: editcap: \"%s\" isn't a valid rel time value\n",
|
|
optarg_str_p);
|
|
return FALSE;
|
|
}
|
|
}
|
|
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);
|
|
return FALSE;
|
|
}
|
|
} else {
|
|
return TRUE; /* no fractional digits */
|
|
}
|
|
|
|
/* adjust fractional portion from fractional to numerator
|
|
* e.g., in "1.5" from 5 to 500000000 since .5*10^9 = 500000000 */
|
|
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 = (int)val;
|
|
return TRUE;
|
|
}
|
|
|
|
#define LINUX_SLL_OFFSETP 14
|
|
#define VLAN_SIZE 4
|
|
static void
|
|
sll_remove_vlan_info(guint8* fd, guint32* len) {
|
|
if (pntoh16(fd + LINUX_SLL_OFFSETP) == ETHERTYPE_VLAN) {
|
|
int rest_len;
|
|
/* point to start of vlan */
|
|
fd = fd + LINUX_SLL_OFFSETP;
|
|
/* bytes to read after vlan info */
|
|
rest_len = *len - (LINUX_SLL_OFFSETP + VLAN_SIZE);
|
|
/* remove vlan info from packet */
|
|
memmove(fd, fd + VLAN_SIZE, rest_len);
|
|
*len -= 4;
|
|
}
|
|
}
|
|
|
|
static void
|
|
remove_vlan_info(const struct wtap_pkthdr *phdr, guint8* fd, guint32* len) {
|
|
switch (phdr->pkt_encap) {
|
|
case WTAP_ENCAP_SLL:
|
|
sll_remove_vlan_info(fd, len);
|
|
break;
|
|
default:
|
|
/* no support for current pkt_encap */
|
|
break;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
is_duplicate(guint8* fd, guint32 len) {
|
|
int i;
|
|
|
|
/*Hint to ignore some bytes at the start of the frame for the digest calculation(-I option) */
|
|
guint32 offset = ignored_bytes;
|
|
guint32 new_len;
|
|
guint8 *new_fd;
|
|
|
|
if (len <= ignored_bytes) {
|
|
offset = 0;
|
|
}
|
|
|
|
new_fd = &fd[offset];
|
|
new_len = len - (offset);
|
|
|
|
cur_dup_entry++;
|
|
if (cur_dup_entry >= dup_window)
|
|
cur_dup_entry = 0;
|
|
|
|
/* Calculate our digest */
|
|
gcry_md_hash_buffer(GCRY_MD_MD5, fd_hash[cur_dup_entry].digest, new_fd, new_len);
|
|
|
|
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;
|
|
|
|
/*Hint to ignore some bytes at the start of the frame for the digest calculation(-I option) */
|
|
guint32 offset = ignored_bytes;
|
|
guint32 new_len;
|
|
guint8 *new_fd;
|
|
|
|
if (len <= ignored_bytes) {
|
|
offset = 0;
|
|
}
|
|
|
|
new_fd = &fd[offset];
|
|
new_len = len - (offset);
|
|
|
|
cur_dup_entry++;
|
|
if (cur_dup_entry >= dup_window)
|
|
cur_dup_entry = 0;
|
|
|
|
/* Calculate our digest */
|
|
gcry_md_hash_buffer(GCRY_MD_MD5, fd_hash[cur_dup_entry].digest, new_fd, new_len);
|
|
|
|
fd_hash[cur_dup_entry].len = len;
|
|
fd_hash[cur_dup_entry].frame_time.secs = current->secs;
|
|
fd_hash[cur_dup_entry].frame_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 deliberately 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].frame_time))) {
|
|
/*
|
|
* We've decremented to an unused fd_hash[] entry.
|
|
* Check no more!
|
|
*/
|
|
break;
|
|
}
|
|
|
|
nstime_delta(&delta, current, &fd_hash[i].frame_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
|
|
print_usage(FILE *output)
|
|
{
|
|
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, " --novlan remove vlan info from packets before checking for duplicates.\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, " -a <framenum>:<comment> Add or replace comment for given frame number\n");
|
|
fprintf(output, "\n");
|
|
fprintf(output, " -I <bytes to ignore> ignore the specified number of bytes at the beginning\n");
|
|
fprintf(output, " of the frame during MD5 hash calculation, unless the\n");
|
|
fprintf(output, " frame is too short, then the full frame is used.\n");
|
|
fprintf(output, " Useful to remove duplicated packets taken on\n");
|
|
fprintf(output, " several routers (different mac addresses for\n");
|
|
fprintf(output, " example).\n");
|
|
fprintf(output, " e.g. -I 26 in case of Ether/IP will ignore\n");
|
|
fprintf(output, " ether(14) and IP header(20 - 4(src ip) - 4(dst ip)).\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 [offset:]<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. If an optional offset precedes the length,\n");
|
|
fprintf(output, " then the bytes chopped will be offset from that value.\n");
|
|
fprintf(output, " Positive offsets are from the packet beginning,\n");
|
|
fprintf(output, " negative offsets are from the packet end. You can use\n");
|
|
fprintf(output, " this option more than once, allowing up to 2 chopping\n");
|
|
fprintf(output, " regions within a packet provided that at least 1\n");
|
|
fprintf(output, " choplen is positive and at least 1 is negative.\n");
|
|
fprintf(output, " -L adjust the frame (i.e. reported) length when chopping\n");
|
|
fprintf(output, " and/or snapping.\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 ensure\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.) that\n");
|
|
fprintf(output, " a particular packet byte will be randomly changed.\n");
|
|
fprintf(output, " -o <change offset> When used in conjunction with -E, skip some bytes from the\n");
|
|
fprintf(output, " beginning of the packet. This allows one to preserve some\n");
|
|
fprintf(output, " bytes, in order to have some headers untouched.\n");
|
|
fprintf(output, "\n");
|
|
fprintf(output, "Output File(s):\n");
|
|
fprintf(output, " -c <packets per file> split the packet output to different files based on\n");
|
|
fprintf(output, " uniform packet counts with a maximum of\n");
|
|
fprintf(output, " <packets per file> each.\n");
|
|
fprintf(output, " -i <seconds per file> split the packet output to different files based on\n");
|
|
fprintf(output, " uniform time intervals with a maximum of\n");
|
|
fprintf(output, " <seconds per file> each.\n");
|
|
fprintf(output, " -F <capture type> set the output file type; default is pcapng. An empty\n");
|
|
fprintf(output, " \"-F\" option will list the file types.\n");
|
|
fprintf(output, " -T <encap type> set the output file encapsulation type; default is the\n");
|
|
fprintf(output, " same as the input file. An empty \"-T\" option will\n");
|
|
fprintf(output, " 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-error.\n");
|
|
}
|
|
|
|
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(((const struct string_elem *)a)->sstr,
|
|
((const struct string_elem *)b)->sstr);
|
|
}
|
|
|
|
static gint
|
|
string_nat_compare(gconstpointer a, gconstpointer b)
|
|
{
|
|
return ws_ascii_strnatcmp(((const struct string_elem *)a)->sstr,
|
|
((const struct string_elem *)b)->sstr);
|
|
}
|
|
|
|
static void
|
|
string_elem_print(gpointer data, gpointer stream_ptr)
|
|
{
|
|
fprintf((FILE *) stream_ptr, " %s - %s\n",
|
|
((struct string_elem *)data)->sstr,
|
|
((struct string_elem *)data)->lstr);
|
|
}
|
|
|
|
static void
|
|
list_capture_types(FILE *stream) {
|
|
int i;
|
|
struct string_elem *captypes;
|
|
GSList *list = NULL;
|
|
|
|
captypes = g_new(struct string_elem,WTAP_NUM_FILE_TYPES_SUBTYPES);
|
|
fprintf(stream, "editcap: The available capture file types for the \"-F\" flag are:\n");
|
|
for (i = 0; i < WTAP_NUM_FILE_TYPES_SUBTYPES; i++) {
|
|
if (wtap_dump_can_open(i)) {
|
|
captypes[i].sstr = wtap_file_type_subtype_short_string(i);
|
|
captypes[i].lstr = wtap_file_type_subtype_string(i);
|
|
list = g_slist_insert_sorted(list, &captypes[i], string_compare);
|
|
}
|
|
}
|
|
g_slist_foreach(list, string_elem_print, stream);
|
|
g_slist_free(list);
|
|
g_free(captypes);
|
|
}
|
|
|
|
static void
|
|
list_encap_types(FILE *stream) {
|
|
int i;
|
|
struct string_elem *encaps;
|
|
GSList *list = NULL;
|
|
|
|
encaps = (struct string_elem *)g_malloc(sizeof(struct string_elem) * WTAP_NUM_ENCAP_TYPES);
|
|
fprintf(stream, "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_nat_compare);
|
|
}
|
|
}
|
|
g_slist_foreach(list, string_elem_print, stream);
|
|
g_slist_free(list);
|
|
g_free(encaps);
|
|
}
|
|
|
|
static int
|
|
framenum_compare(gconstpointer a, gconstpointer b, gpointer user_data _U_)
|
|
{
|
|
if (GPOINTER_TO_UINT(a) < GPOINTER_TO_UINT(b))
|
|
return -1;
|
|
|
|
if (GPOINTER_TO_UINT(a) > GPOINTER_TO_UINT(b))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* General errors and warnings are reported with an console message
|
|
* in editcap.
|
|
*/
|
|
static void
|
|
failure_warning_message(const char *msg_format, va_list ap)
|
|
{
|
|
fprintf(stderr, "editcap: ");
|
|
vfprintf(stderr, msg_format, ap);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
|
|
/*
|
|
* Report additional information for an error in command-line arguments.
|
|
*/
|
|
static void
|
|
failure_message_cont(const char *msg_format, va_list ap)
|
|
{
|
|
vfprintf(stderr, msg_format, ap);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
|
|
static wtap_dumper *
|
|
editcap_dump_open(const char *filename, guint32 snaplen,
|
|
GArray* shb_hdrs,
|
|
wtapng_iface_descriptions_t *idb_inf,
|
|
GArray* nrb_hdrs, int *write_err)
|
|
{
|
|
wtap_dumper *pdh;
|
|
|
|
if (strcmp(filename, "-") == 0) {
|
|
/* Write to the standard output. */
|
|
pdh = wtap_dump_open_stdout_ng(out_file_type_subtype, out_frame_type,
|
|
snaplen, FALSE /* compressed */,
|
|
shb_hdrs, idb_inf, nrb_hdrs, write_err);
|
|
} else {
|
|
pdh = wtap_dump_open_ng(filename, out_file_type_subtype, out_frame_type,
|
|
snaplen, FALSE /* compressed */,
|
|
shb_hdrs, idb_inf, nrb_hdrs, write_err);
|
|
}
|
|
return pdh;
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
GString *comp_info_str;
|
|
GString *runtime_info_str;
|
|
char *init_progfile_dir_error;
|
|
wtap *wth = NULL;
|
|
int i, j, read_err, write_err;
|
|
gchar *read_err_info, *write_err_info;
|
|
int opt;
|
|
static const struct option long_options[] = {
|
|
{"novlan", no_argument, NULL, 0x8100},
|
|
{"help", no_argument, NULL, 'h'},
|
|
{"version", no_argument, NULL, 'V'},
|
|
{0, 0, 0, 0 }
|
|
};
|
|
|
|
char *p;
|
|
guint32 snaplen = 0; /* No limit */
|
|
chop_t chop = {0, 0, 0, 0, 0, 0}; /* No chop */
|
|
gboolean adjlen = FALSE;
|
|
wtap_dumper *pdh = NULL;
|
|
unsigned int count = 1;
|
|
unsigned int duplicate_count = 0;
|
|
gint64 data_offset;
|
|
int err_type;
|
|
guint8 *buf;
|
|
guint32 read_count = 0;
|
|
guint32 split_packet_count = 0;
|
|
int written_count = 0;
|
|
char *filename = NULL;
|
|
gboolean ts_okay;
|
|
guint32 secs_per_block = 0;
|
|
int block_cnt = 0;
|
|
nstime_t block_start;
|
|
gchar *fprefix = NULL;
|
|
gchar *fsuffix = NULL;
|
|
guint32 change_offset = 0;
|
|
guint max_packet_number = 0;
|
|
const struct wtap_pkthdr *phdr;
|
|
struct wtap_pkthdr temp_phdr;
|
|
wtapng_iface_descriptions_t *idb_inf = NULL;
|
|
GArray *shb_hdrs = NULL;
|
|
GArray *nrb_hdrs = NULL;
|
|
char *shb_user_appl;
|
|
int ret = EXIT_SUCCESS;
|
|
|
|
cmdarg_err_init(failure_warning_message, failure_message_cont);
|
|
|
|
#ifdef _WIN32
|
|
arg_list_utf_16to8(argc, argv);
|
|
create_app_running_mutex();
|
|
#endif /* _WIN32 */
|
|
|
|
/* Get the compile-time version information string */
|
|
comp_info_str = get_compiled_version_info(NULL, NULL);
|
|
|
|
/* Get the run-time version information string */
|
|
runtime_info_str = get_runtime_version_info(NULL);
|
|
|
|
/* Add it to the information to be reported on a crash. */
|
|
ws_add_crash_info("Editcap (Wireshark) %s\n"
|
|
"\n"
|
|
"%s"
|
|
"\n"
|
|
"%s",
|
|
get_ws_vcs_version_info(), comp_info_str->str, runtime_info_str->str);
|
|
g_string_free(comp_info_str, TRUE);
|
|
g_string_free(runtime_info_str, TRUE);
|
|
|
|
/*
|
|
* Get credential information for later use.
|
|
*/
|
|
init_process_policies();
|
|
|
|
/*
|
|
* Attempt to get the pathname of the directory containing the
|
|
* executable file.
|
|
*/
|
|
init_progfile_dir_error = init_progfile_dir(argv[0], main);
|
|
if (init_progfile_dir_error != NULL) {
|
|
fprintf(stderr,
|
|
"editcap: Can't get pathname of directory containing the editcap program: %s.\n",
|
|
init_progfile_dir_error);
|
|
g_free(init_progfile_dir_error);
|
|
}
|
|
|
|
wtap_init();
|
|
|
|
#ifdef HAVE_PLUGINS
|
|
/* Register wiretap plugins */
|
|
init_report_message(failure_warning_message, failure_warning_message,
|
|
NULL, NULL, NULL);
|
|
|
|
/* Scan for plugins. This does *not* call their registration routines;
|
|
that's done later.
|
|
|
|
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). */
|
|
scan_plugins(DONT_REPORT_LOAD_FAILURE);
|
|
|
|
/* Register all libwiretap plugin modules. */
|
|
register_all_wiretap_modules();
|
|
#endif
|
|
|
|
/* Process the options */
|
|
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) {
|
|
switch (opt) {
|
|
case 0x8100:
|
|
{
|
|
rem_vlan = TRUE;
|
|
break;
|
|
}
|
|
|
|
case 'a':
|
|
{
|
|
guint frame_number;
|
|
gint string_start_index = 0;
|
|
|
|
if ((sscanf(optarg, "%u:%n", &frame_number, &string_start_index) < 1) || (string_start_index == 0)) {
|
|
fprintf(stderr, "editcap: \"%s\" isn't a valid <frame>:<comment>\n\n",
|
|
optarg);
|
|
ret = INVALID_OPTION;
|
|
goto clean_exit;
|
|
}
|
|
|
|
/* Lazily create the table */
|
|
if (!frames_user_comments) {
|
|
frames_user_comments = g_tree_new_full(framenum_compare, NULL, NULL, g_free);
|
|
}
|
|
|
|
/* Insert this entry (framenum -> comment) */
|
|
g_tree_replace(frames_user_comments, GUINT_TO_POINTER(frame_number), g_strdup(optarg+string_start_index));
|
|
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);
|
|
ret = INVALID_OPTION;
|
|
goto clean_exit;
|
|
}
|
|
|
|
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);
|
|
ret = INVALID_OPTION;
|
|
goto clean_exit;
|
|
}
|
|
check_startstop = TRUE;
|
|
stoptm.tm_isdst = -1;
|
|
stoptime = mktime(&stoptm);
|
|
break;
|
|
}
|
|
|
|
case 'c':
|
|
split_packet_count = get_nonzero_guint32(optarg, "packet count");
|
|
break;
|
|
|
|
case 'C':
|
|
{
|
|
int choplen = 0, chopoff = 0;
|
|
|
|
switch (sscanf(optarg, "%d:%d", &chopoff, &choplen)) {
|
|
case 1: /* only the chop length was specififed */
|
|
choplen = chopoff;
|
|
chopoff = 0;
|
|
break;
|
|
|
|
case 2: /* both an offset and chop length was specified */
|
|
break;
|
|
|
|
default:
|
|
fprintf(stderr, "editcap: \"%s\" isn't a valid chop length or offset:length\n",
|
|
optarg);
|
|
ret = INVALID_OPTION;
|
|
goto clean_exit;
|
|
break;
|
|
}
|
|
|
|
if (choplen > 0) {
|
|
chop.len_begin += choplen;
|
|
if (chopoff > 0)
|
|
chop.off_begin_pos += chopoff;
|
|
else
|
|
chop.off_begin_neg += chopoff;
|
|
} else if (choplen < 0) {
|
|
chop.len_end += choplen;
|
|
if (chopoff > 0)
|
|
chop.off_end_pos += chopoff;
|
|
else
|
|
chop.off_end_neg += chopoff;
|
|
}
|
|
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 = get_guint32(optarg, "duplicate window");
|
|
if (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);
|
|
ret = INVALID_OPTION;
|
|
goto clean_exit;
|
|
}
|
|
break;
|
|
|
|
case 'E':
|
|
err_prob = g_ascii_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);
|
|
ret = INVALID_OPTION;
|
|
goto clean_exit;
|
|
}
|
|
srand( (unsigned int) (time(NULL) + ws_getpid()) );
|
|
break;
|
|
|
|
case 'F':
|
|
out_file_type_subtype = wtap_short_string_to_file_type_subtype(optarg);
|
|
if (out_file_type_subtype < 0) {
|
|
fprintf(stderr, "editcap: \"%s\" isn't a valid capture file type\n\n",
|
|
optarg);
|
|
list_capture_types(stderr);
|
|
ret = INVALID_OPTION;
|
|
goto clean_exit;
|
|
}
|
|
break;
|
|
|
|
case 'h':
|
|
printf("Editcap (Wireshark) %s\n"
|
|
"Edit and/or translate the format of capture files.\n"
|
|
"See https://www.wireshark.org for more information.\n",
|
|
get_ws_vcs_version_info());
|
|
print_usage(stdout);
|
|
goto clean_exit;
|
|
break;
|
|
|
|
case 'i': /* break capture file based on time interval */
|
|
secs_per_block = get_nonzero_guint32(optarg, "time interval");
|
|
break;
|
|
|
|
case 'I': /* ignored_bytes at the beginning of the frame for duplications removal */
|
|
ignored_bytes = get_guint32(optarg, "number of bytes to ignore");
|
|
break;
|
|
|
|
case 'L':
|
|
adjlen = TRUE;
|
|
break;
|
|
|
|
case 'o':
|
|
change_offset = get_guint32(optarg, "change offset");
|
|
break;
|
|
|
|
case 'r':
|
|
keep_em = !keep_em; /* Just invert */
|
|
break;
|
|
|
|
case 's':
|
|
snaplen = get_nonzero_guint32(optarg, "snapshot length");
|
|
break;
|
|
|
|
case 'S':
|
|
if (!set_strict_time_adj(optarg)) {
|
|
ret = INVALID_OPTION;
|
|
goto clean_exit;
|
|
}
|
|
do_strict_time_adjustment = TRUE;
|
|
break;
|
|
|
|
case 't':
|
|
if (!set_time_adjustment(optarg)) {
|
|
ret = INVALID_OPTION;
|
|
goto clean_exit;
|
|
}
|
|
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(stderr);
|
|
ret = INVALID_OPTION;
|
|
goto clean_exit;
|
|
}
|
|
break;
|
|
|
|
case 'v':
|
|
verbose = !verbose; /* Just invert */
|
|
break;
|
|
|
|
case 'V':
|
|
comp_info_str = get_compiled_version_info(NULL, NULL);
|
|
runtime_info_str = get_runtime_version_info(NULL);
|
|
show_version("Editcap (Wireshark)", comp_info_str, runtime_info_str);
|
|
g_string_free(comp_info_str, TRUE);
|
|
g_string_free(runtime_info_str, TRUE);
|
|
goto clean_exit;
|
|
break;
|
|
|
|
case 'w':
|
|
dup_detect = FALSE;
|
|
dup_detect_by_time = TRUE;
|
|
dup_window = MAX_DUP_DEPTH;
|
|
if (!set_rel_time(optarg)) {
|
|
ret = INVALID_OPTION;
|
|
goto clean_exit;
|
|
}
|
|
break;
|
|
|
|
case '?': /* Bad options if GNU getopt */
|
|
case ':': /* missing option argument */
|
|
switch(optopt) {
|
|
case'F':
|
|
list_capture_types(stdout);
|
|
break;
|
|
case'T':
|
|
list_encap_types(stdout);
|
|
break;
|
|
default:
|
|
if (opt == '?') {
|
|
fprintf(stderr, "editcap: invalid option -- '%c'\n", optopt);
|
|
} else {
|
|
fprintf(stderr, "editcap: option requires an argument -- '%c'\n", optopt);
|
|
}
|
|
print_usage(stderr);
|
|
ret = INVALID_OPTION;
|
|
break;
|
|
}
|
|
goto clean_exit;
|
|
break;
|
|
}
|
|
} /* processing commmand-line options */
|
|
|
|
#ifdef DEBUG
|
|
fprintf(stderr, "Optind = %i, argc = %i\n", optind, argc);
|
|
#endif
|
|
|
|
if ((argc - optind) < 1) {
|
|
print_usage(stderr);
|
|
ret = INVALID_OPTION;
|
|
goto clean_exit;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
nstime_set_unset(&block_start);
|
|
|
|
if (starttime > stoptime) {
|
|
fprintf(stderr, "editcap: start time is after the stop time\n");
|
|
ret = INVALID_OPTION;
|
|
goto clean_exit;
|
|
}
|
|
|
|
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");
|
|
ret = INVALID_OPTION;
|
|
goto clean_exit;
|
|
}
|
|
|
|
wth = wtap_open_offline(argv[optind], WTAP_TYPE_AUTO, &read_err, &read_err_info, FALSE);
|
|
|
|
if (!wth) {
|
|
cfile_open_failure_message("editcap", argv[optind], read_err,
|
|
read_err_info);
|
|
ret = INVALID_FILE;
|
|
goto clean_exit;
|
|
}
|
|
|
|
if (verbose) {
|
|
fprintf(stderr, "File %s is a %s capture file.\n", argv[optind],
|
|
wtap_file_type_subtype_string(wtap_file_type_subtype(wth)));
|
|
}
|
|
|
|
shb_hdrs = wtap_file_get_shb_for_new_file(wth);
|
|
idb_inf = wtap_file_get_idb_info(wth);
|
|
nrb_hdrs = wtap_file_get_nrb_for_new_file(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);
|
|
|
|
for (i = optind + 2; i < argc; i++)
|
|
if (add_selection(argv[i], &max_packet_number) == FALSE)
|
|
break;
|
|
|
|
if (keep_em == FALSE)
|
|
max_packet_number = G_MAXUINT;
|
|
|
|
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].frame_time);
|
|
}
|
|
}
|
|
|
|
/* Read all of the packets in turn */
|
|
while (wtap_read(wth, &read_err, &read_err_info, &data_offset)) {
|
|
if (max_packet_number <= read_count)
|
|
break;
|
|
|
|
read_count++;
|
|
|
|
phdr = wtap_phdr(wth);
|
|
|
|
/* Extra actions for the first packet */
|
|
if (read_count == 1) {
|
|
if (split_packet_count != 0 || secs_per_block != 0) {
|
|
if (!fileset_extract_prefix_suffix(argv[optind+1], &fprefix, &fsuffix)) {
|
|
ret = CANT_EXTRACT_PREFIX;
|
|
goto clean_exit;
|
|
}
|
|
|
|
filename = fileset_get_filename_by_pattern(block_cnt++, phdr, fprefix, fsuffix);
|
|
} else {
|
|
filename = g_strdup(argv[optind+1]);
|
|
}
|
|
g_assert(filename);
|
|
|
|
/* If we don't have an application name add Editcap */
|
|
if (wtap_block_get_string_option_value(g_array_index(shb_hdrs, wtap_block_t, 0), OPT_SHB_USERAPPL, &shb_user_appl) != WTAP_OPTTYPE_SUCCESS) {
|
|
wtap_block_add_string_option_format(g_array_index(shb_hdrs, wtap_block_t, 0), OPT_SHB_USERAPPL, "Editcap " VERSION);
|
|
}
|
|
|
|
pdh = editcap_dump_open(filename,
|
|
snaplen ? MIN(snaplen, wtap_snapshot_length(wth)) : wtap_snapshot_length(wth),
|
|
shb_hdrs, idb_inf, nrb_hdrs, &write_err);
|
|
|
|
if (pdh == NULL) {
|
|
cfile_dump_open_failure_message("editcap", filename,
|
|
write_err,
|
|
out_file_type_subtype);
|
|
ret = INVALID_FILE;
|
|
goto clean_exit;
|
|
}
|
|
} /* first packet only handling */
|
|
|
|
|
|
buf = wtap_buf_ptr(wth);
|
|
|
|
/*
|
|
* Not all packets have time stamps. Only process the time
|
|
* stamp if we have one.
|
|
*/
|
|
if (phdr->presence_flags & WTAP_HAS_TS) {
|
|
if (nstime_is_unset(&block_start)) {
|
|
block_start = phdr->ts;
|
|
}
|
|
if (secs_per_block != 0) {
|
|
while (((guint32)(phdr->ts.secs - block_start.secs) > secs_per_block)
|
|
|| ((guint32)(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, &write_err)) {
|
|
cfile_close_failure_message(filename, write_err);
|
|
ret = WRITE_ERROR;
|
|
goto clean_exit;
|
|
}
|
|
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, fprefix, fsuffix);
|
|
g_assert(filename);
|
|
|
|
if (verbose)
|
|
fprintf(stderr, "Continuing writing in file %s\n", filename);
|
|
|
|
pdh = editcap_dump_open(filename,
|
|
snaplen ? MIN(snaplen, wtap_snapshot_length(wth)) : wtap_snapshot_length(wth),
|
|
shb_hdrs, idb_inf, nrb_hdrs, &write_err);
|
|
|
|
if (pdh == NULL) {
|
|
cfile_dump_open_failure_message("editcap", filename,
|
|
write_err,
|
|
out_file_type_subtype);
|
|
ret = INVALID_FILE;
|
|
goto clean_exit;
|
|
}
|
|
}
|
|
}
|
|
} /* time stamp handling */
|
|
|
|
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, &write_err)) {
|
|
cfile_close_failure_message(filename, write_err);
|
|
ret = WRITE_ERROR;
|
|
goto clean_exit;
|
|
}
|
|
|
|
g_free(filename);
|
|
filename = fileset_get_filename_by_pattern(block_cnt++, phdr, fprefix, fsuffix);
|
|
g_assert(filename);
|
|
|
|
if (verbose)
|
|
fprintf(stderr, "Continuing writing in file %s\n", filename);
|
|
|
|
pdh = editcap_dump_open(filename,
|
|
snaplen ? MIN(snaplen, wtap_snapshot_length(wth)) : wtap_snapshot_length(wth),
|
|
shb_hdrs, idb_inf, nrb_hdrs, &write_err);
|
|
if (pdh == NULL) {
|
|
cfile_dump_open_failure_message("editcap", filename,
|
|
write_err,
|
|
out_file_type_subtype);
|
|
ret = INVALID_FILE;
|
|
goto clean_exit;
|
|
}
|
|
}
|
|
} /* split packet handling */
|
|
|
|
if (check_startstop) {
|
|
/*
|
|
* Is the packet in the selected timeframe?
|
|
* If the packet has no time stamp, the answer is "no".
|
|
*/
|
|
if (phdr->presence_flags & WTAP_HAS_TS)
|
|
ts_okay = (phdr->ts.secs >= starttime) && (phdr->ts.secs < stoptime);
|
|
else
|
|
ts_okay = FALSE;
|
|
} else {
|
|
/*
|
|
* No selected timeframe, so all packets are "in the
|
|
* selected timeframe".
|
|
*/
|
|
ts_okay = TRUE;
|
|
}
|
|
|
|
if (ts_okay && ((!selected(count) && !keep_em)
|
|
|| (selected(count) && keep_em))) {
|
|
|
|
if (verbose && !dup_detect && !dup_detect_by_time)
|
|
fprintf(stderr, "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 (snaplen != 0) {
|
|
/* Limit capture length to snaplen */
|
|
if (phdr->caplen > snaplen) {
|
|
/* Copy and change rather than modify returned phdr */
|
|
temp_phdr = *phdr;
|
|
temp_phdr.caplen = snaplen;
|
|
phdr = &temp_phdr;
|
|
}
|
|
/* If -L, also set reported length to snaplen */
|
|
if (adjlen && phdr->len > snaplen) {
|
|
/* Copy and change rather than modify returned phdr */
|
|
temp_phdr = *phdr;
|
|
temp_phdr.len = snaplen;
|
|
phdr = &temp_phdr;
|
|
}
|
|
}
|
|
|
|
/* CHOP */
|
|
temp_phdr = *phdr;
|
|
handle_chopping(chop, &temp_phdr, phdr, &buf, adjlen);
|
|
phdr = &temp_phdr;
|
|
|
|
if (phdr->presence_flags & WTAP_HAS_TS) {
|
|
/* Do we adjust timestamps to ensure strict chronological
|
|
* 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 = phdr->ts;
|
|
|
|
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).
|
|
*/
|
|
/* fprintf(stderr, "++out of order, need to adjust this packet!\n"); */
|
|
temp_phdr = *phdr;
|
|
temp_phdr.ts.secs = previous_time.secs + strict_time_adj.tv.secs;
|
|
temp_phdr.ts.nsecs = previous_time.nsecs;
|
|
if (temp_phdr.ts.nsecs + strict_time_adj.tv.nsecs > ONE_BILLION) {
|
|
/* carry */
|
|
temp_phdr.ts.secs++;
|
|
temp_phdr.ts.nsecs += strict_time_adj.tv.nsecs - ONE_BILLION;
|
|
} else {
|
|
temp_phdr.ts.nsecs += strict_time_adj.tv.nsecs;
|
|
}
|
|
phdr = &temp_phdr;
|
|
}
|
|
} else {
|
|
/*
|
|
* A negative strict time adjustment is requested.
|
|
* Unconditionally set each timestamp to previous
|
|
* packet's timestamp plus delta.
|
|
*/
|
|
temp_phdr = *phdr;
|
|
temp_phdr.ts.secs = previous_time.secs + strict_time_adj.tv.secs;
|
|
temp_phdr.ts.nsecs = previous_time.nsecs;
|
|
if (temp_phdr.ts.nsecs + strict_time_adj.tv.nsecs > ONE_BILLION) {
|
|
/* carry */
|
|
temp_phdr.ts.secs++;
|
|
temp_phdr.ts.nsecs += strict_time_adj.tv.nsecs - ONE_BILLION;
|
|
} else {
|
|
temp_phdr.ts.nsecs += strict_time_adj.tv.nsecs;
|
|
}
|
|
phdr = &temp_phdr;
|
|
}
|
|
}
|
|
previous_time = phdr->ts;
|
|
}
|
|
|
|
if (time_adj.tv.secs != 0) {
|
|
temp_phdr = *phdr;
|
|
if (time_adj.is_negative)
|
|
temp_phdr.ts.secs -= time_adj.tv.secs;
|
|
else
|
|
temp_phdr.ts.secs += time_adj.tv.secs;
|
|
phdr = &temp_phdr;
|
|
}
|
|
|
|
if (time_adj.tv.nsecs != 0) {
|
|
temp_phdr = *phdr;
|
|
if (time_adj.is_negative) { /* subtract */
|
|
if (temp_phdr.ts.nsecs < time_adj.tv.nsecs) { /* borrow */
|
|
temp_phdr.ts.secs--;
|
|
temp_phdr.ts.nsecs += ONE_BILLION;
|
|
}
|
|
temp_phdr.ts.nsecs -= time_adj.tv.nsecs;
|
|
} else { /* add */
|
|
if (temp_phdr.ts.nsecs + time_adj.tv.nsecs > ONE_BILLION) {
|
|
/* carry */
|
|
temp_phdr.ts.secs++;
|
|
temp_phdr.ts.nsecs += time_adj.tv.nsecs - ONE_BILLION;
|
|
} else {
|
|
temp_phdr.ts.nsecs += time_adj.tv.nsecs;
|
|
}
|
|
}
|
|
phdr = &temp_phdr;
|
|
}
|
|
} /* time stamp adjustment */
|
|
|
|
/* remove vlan info */
|
|
if (rem_vlan) {
|
|
/* TODO: keep casting const like this? change pointer instead of value? */
|
|
remove_vlan_info(phdr, buf, (guint32 *) &phdr->caplen);
|
|
}
|
|
|
|
/* suppress duplicates by packet window */
|
|
if (dup_detect) {
|
|
if (is_duplicate(buf, phdr->caplen)) {
|
|
if (verbose) {
|
|
fprintf(stderr, "Skipped: %u, Len: %u, MD5 Hash: ",
|
|
count, phdr->caplen);
|
|
for (i = 0; i < 16; i++)
|
|
fprintf(stderr, "%02x",
|
|
(unsigned char)fd_hash[cur_dup_entry].digest[i]);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
duplicate_count++;
|
|
count++;
|
|
continue;
|
|
} else {
|
|
if (verbose) {
|
|
fprintf(stderr, "Packet: %u, Len: %u, MD5 Hash: ",
|
|
count, phdr->caplen);
|
|
for (i = 0; i < 16; i++)
|
|
fprintf(stderr, "%02x",
|
|
(unsigned char)fd_hash[cur_dup_entry].digest[i]);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
}
|
|
} /* suppression of duplicates */
|
|
|
|
if (phdr->presence_flags & WTAP_HAS_TS) {
|
|
/* 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(stderr, "Skipped: %u, Len: %u, MD5 Hash: ",
|
|
count, phdr->caplen);
|
|
for (i = 0; i < 16; i++)
|
|
fprintf(stderr, "%02x",
|
|
(unsigned char)fd_hash[cur_dup_entry].digest[i]);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
duplicate_count++;
|
|
count++;
|
|
continue;
|
|
} else {
|
|
if (verbose) {
|
|
fprintf(stderr, "Packet: %u, Len: %u, MD5 Hash: ",
|
|
count, phdr->caplen);
|
|
for (i = 0; i < 16; i++)
|
|
fprintf(stderr, "%02x",
|
|
(unsigned char)fd_hash[cur_dup_entry].digest[i]);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
}
|
|
}
|
|
} /* suppress duplicates by time window */
|
|
|
|
if (change_offset > phdr->caplen) {
|
|
fprintf(stderr, "change offset %u is longer than caplen %u in packet %u\n",
|
|
change_offset, phdr->caplen, count);
|
|
}
|
|
|
|
/* Random error mutation */
|
|
if (err_prob > 0.0 && change_offset <= phdr->caplen) {
|
|
int real_data_start = 0;
|
|
|
|
/* Protect non-protocol data */
|
|
if (wtap_file_type_subtype(wth) == WTAP_FILE_TYPE_SUBTYPE_CATAPULT_DCT2000)
|
|
real_data_start = find_dct2000_real_data(buf);
|
|
|
|
real_data_start += change_offset;
|
|
|
|
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)
|
|
g_strlcpy((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;
|
|
}
|
|
}
|
|
}
|
|
} /* random error mutation */
|
|
|
|
/* Find a packet comment we may need to write */
|
|
if (frames_user_comments) {
|
|
const char *comment =
|
|
(const char*)g_tree_lookup(frames_user_comments, GUINT_TO_POINTER(read_count));
|
|
/* XXX: What about comment changed to no comment? */
|
|
if (comment != NULL) {
|
|
/* Copy and change rather than modify returned phdr */
|
|
temp_phdr = *phdr;
|
|
temp_phdr.opt_comment = g_strdup(comment);
|
|
temp_phdr.has_comment_changed = TRUE;
|
|
phdr = &temp_phdr;
|
|
} else {
|
|
temp_phdr = *phdr;
|
|
temp_phdr.has_comment_changed = FALSE;
|
|
phdr = &temp_phdr;
|
|
}
|
|
}
|
|
|
|
/* Attempt to dump out current frame to the output file */
|
|
if (!wtap_dump(pdh, phdr, buf, &write_err, &write_err_info)) {
|
|
cfile_write_failure_message("editcap", argv[optind],
|
|
filename,
|
|
write_err, write_err_info,
|
|
read_count,
|
|
out_file_type_subtype);
|
|
ret = DUMP_ERROR;
|
|
goto clean_exit;
|
|
}
|
|
written_count++;
|
|
}
|
|
count++;
|
|
}
|
|
|
|
g_free(fprefix);
|
|
g_free(fsuffix);
|
|
|
|
if (read_err != 0) {
|
|
/* Print a message noting that the read failed somewhere along the
|
|
* line. */
|
|
cfile_read_failure_message("editcap", argv[optind], read_err,
|
|
read_err_info);
|
|
}
|
|
|
|
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 = editcap_dump_open(filename,
|
|
snaplen ? MIN(snaplen, wtap_snapshot_length(wth)): wtap_snapshot_length(wth),
|
|
shb_hdrs, idb_inf, nrb_hdrs, &write_err);
|
|
if (pdh == NULL) {
|
|
cfile_dump_open_failure_message("editcap", filename,
|
|
write_err,
|
|
out_file_type_subtype);
|
|
ret = INVALID_FILE;
|
|
goto clean_exit;
|
|
}
|
|
}
|
|
|
|
if (!wtap_dump_close(pdh, &write_err)) {
|
|
cfile_close_failure_message(filename, write_err);
|
|
ret = WRITE_ERROR;
|
|
goto clean_exit;
|
|
}
|
|
g_free(filename);
|
|
|
|
if (frames_user_comments) {
|
|
g_tree_destroy(frames_user_comments);
|
|
}
|
|
}
|
|
|
|
if (dup_detect) {
|
|
fprintf(stderr, "%u packet%s seen, %u packet%s skipped with duplicate window of %i packets.\n",
|
|
count - 1, plurality(count - 1, "", "s"), duplicate_count,
|
|
plurality(duplicate_count, "", "s"), dup_window);
|
|
} else if (dup_detect_by_time) {
|
|
fprintf(stderr, "%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);
|
|
}
|
|
|
|
clean_exit:
|
|
wtap_block_array_free(shb_hdrs);
|
|
wtap_block_array_free(nrb_hdrs);
|
|
g_free(idb_inf);
|
|
if (wth != NULL)
|
|
wtap_close(wth);
|
|
wtap_cleanup();
|
|
free_progdirs();
|
|
#ifdef HAVE_PLUGINS
|
|
plugins_cleanup();
|
|
#endif
|
|
return ret;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/*
|
|
* We support up to 2 chopping regions in a single pass: one specified by the
|
|
* positive chop length, and one by the negative chop length.
|
|
*/
|
|
static void
|
|
handle_chopping(chop_t chop, struct wtap_pkthdr *out_phdr,
|
|
const struct wtap_pkthdr *in_phdr, guint8 **buf,
|
|
gboolean adjlen)
|
|
{
|
|
/* Only packets can be chopped. */
|
|
if (in_phdr->rec_type != REC_TYPE_PACKET)
|
|
return;
|
|
|
|
/* If we're not chopping anything from one side, then the offset for that
|
|
* side is meaningless. */
|
|
if (chop.len_begin == 0)
|
|
chop.off_begin_pos = chop.off_begin_neg = 0;
|
|
if (chop.len_end == 0)
|
|
chop.off_end_pos = chop.off_end_neg = 0;
|
|
|
|
if (chop.off_begin_neg < 0) {
|
|
chop.off_begin_pos += in_phdr->caplen + chop.off_begin_neg;
|
|
chop.off_begin_neg = 0;
|
|
}
|
|
if (chop.off_end_pos > 0) {
|
|
chop.off_end_neg += chop.off_end_pos - in_phdr->caplen;
|
|
chop.off_end_pos = 0;
|
|
}
|
|
|
|
/* If we've crossed chopping regions, swap them */
|
|
if (chop.len_begin && chop.len_end) {
|
|
if (chop.off_begin_pos > ((int)in_phdr->caplen + chop.off_end_neg)) {
|
|
int tmp_len, tmp_off;
|
|
|
|
tmp_off = in_phdr->caplen + chop.off_end_neg + chop.len_end;
|
|
tmp_len = -chop.len_end;
|
|
|
|
chop.off_end_neg = chop.len_begin + chop.off_begin_pos - in_phdr->caplen;
|
|
chop.len_end = -chop.len_begin;
|
|
|
|
chop.len_begin = tmp_len;
|
|
chop.off_begin_pos = tmp_off;
|
|
}
|
|
}
|
|
|
|
/* Make sure we don't chop off more than we have available */
|
|
if (in_phdr->caplen < (guint32)(chop.off_begin_pos - chop.off_end_neg)) {
|
|
chop.len_begin = 0;
|
|
chop.len_end = 0;
|
|
}
|
|
if ((guint32)(chop.len_begin - chop.len_end) >
|
|
(in_phdr->caplen - (guint32)(chop.off_begin_pos - chop.off_end_neg))) {
|
|
chop.len_begin = in_phdr->caplen - (chop.off_begin_pos - chop.off_end_neg);
|
|
chop.len_end = 0;
|
|
}
|
|
|
|
/* Handle chopping from the beginning. Note that if a beginning offset
|
|
* was specified, we need to keep that piece */
|
|
if (chop.len_begin > 0) {
|
|
*out_phdr = *in_phdr;
|
|
|
|
if (chop.off_begin_pos > 0) {
|
|
memmove(*buf + chop.off_begin_pos,
|
|
*buf + chop.off_begin_pos + chop.len_begin,
|
|
out_phdr->caplen - chop.len_begin);
|
|
} else {
|
|
*buf += chop.len_begin;
|
|
}
|
|
out_phdr->caplen -= chop.len_begin;
|
|
|
|
if (adjlen) {
|
|
if (in_phdr->len > (guint32)chop.len_begin)
|
|
out_phdr->len -= chop.len_begin;
|
|
else
|
|
out_phdr->len = 0;
|
|
}
|
|
in_phdr = out_phdr;
|
|
}
|
|
|
|
/* Handle chopping from the end. Note that if an ending offset was
|
|
* specified, we need to keep that piece */
|
|
if (chop.len_end < 0) {
|
|
*out_phdr = *in_phdr;
|
|
|
|
if (chop.off_end_neg < 0) {
|
|
memmove(*buf + (gint)out_phdr->caplen + (chop.len_end + chop.off_end_neg),
|
|
*buf + (gint)out_phdr->caplen + chop.off_end_neg,
|
|
-chop.off_end_neg);
|
|
}
|
|
out_phdr->caplen += chop.len_end;
|
|
|
|
if (adjlen) {
|
|
if (((signed int) in_phdr->len + chop.len_end) > 0)
|
|
out_phdr->len += chop.len_end;
|
|
else
|
|
out_phdr->len = 0;
|
|
}
|
|
/*in_phdr = out_phdr;*/
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|