forked from osmocom/wireshark
653 lines
21 KiB
C
653 lines
21 KiB
C
/* Combine dump files, either by appending or by merging by timestamp
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Mergecap written by Scott Renfro <scott@renfro.org> based on
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* editcap by Richard Sharpe and Guy Harris
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*
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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 <errno.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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#ifdef HAVE_LIBZ
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#include <zlib.h> /* to get the libz version number */
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#endif
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#include <string.h>
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#include "wtap.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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#include <wsutil/clopts_common.h>
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#include <wsutil/cmdarg_err.h>
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#include <wsutil/crash_info.h>
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#include <wsutil/file_util.h>
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#include <wsutil/strnatcmp.h>
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#include <wsutil/ws_diag_control.h>
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#include <wsutil/ws_version_info.h>
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#include <wiretap/merge.h>
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#ifdef HAVE_FCNTL_H
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#include <fcntl.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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#endif /* _WIN32 */
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/*
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* Show the usage
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*/
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static void
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print_usage(FILE *output)
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{
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fprintf(output, "\n");
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fprintf(output, "Usage: mergecap [options] -w <outfile>|- <infile> [<infile> ...]\n");
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fprintf(output, "\n");
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fprintf(output, "Output:\n");
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fprintf(output, " -a concatenate rather than merge files.\n");
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fprintf(output, " default is to merge based on frame timestamps.\n");
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fprintf(output, " -s <snaplen> truncate packets to <snaplen> bytes of data.\n");
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fprintf(output, " -w <outfile>|- set the output filename to <outfile> or '-' for stdout.\n");
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fprintf(output, " -F <capture type> set the output file type; default is pcapng.\n");
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fprintf(output, " an empty \"-F\" option will list the file types.\n");
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fprintf(output, " -T <encap type> set the output file encapsulation type;\n");
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fprintf(output, " default is the same as the first input file.\n");
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fprintf(output, " an empty \"-T\" option will list the encapsulation types.\n");
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fprintf(output, "\n");
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fprintf(output, "Miscellaneous:\n");
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fprintf(output, " -h display this help and exit.\n");
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fprintf(output, " -v verbose output.\n");
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}
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/*
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* Report an error in command-line arguments.
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*/
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static void
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mergecap_cmdarg_err(const char *fmt, va_list ap)
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{
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fprintf(stderr, "mergecap: ");
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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}
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/*
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* Report additional information for an error in command-line arguments.
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*/
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static void
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mergecap_cmdarg_err_cont(const char *fmt, va_list ap)
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{
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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}
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struct string_elem {
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const char *sstr; /* The short string */
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const char *lstr; /* The long string */
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};
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static gint
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string_compare(gconstpointer a, gconstpointer b)
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{
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return strcmp(((const struct string_elem *)a)->sstr,
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((const struct string_elem *)b)->sstr);
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}
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static gint
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string_nat_compare(gconstpointer a, gconstpointer b)
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{
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return ws_ascii_strnatcmp(((const struct string_elem *)a)->sstr,
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((const struct string_elem *)b)->sstr);
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}
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static void
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string_elem_print(gpointer data, gpointer not_used _U_)
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{
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fprintf(stderr, " %s - %s\n", ((struct string_elem *)data)->sstr,
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((struct string_elem *)data)->lstr);
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}
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static void
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list_capture_types(void) {
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int i;
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struct string_elem *captypes;
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GSList *list = NULL;
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captypes = g_new(struct string_elem,WTAP_NUM_FILE_TYPES_SUBTYPES);
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fprintf(stderr, "mergecap: The available capture file types for the \"-F\" flag are:\n");
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for (i = 0; i < WTAP_NUM_FILE_TYPES_SUBTYPES; i++) {
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if (wtap_dump_can_open(i)) {
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captypes[i].sstr = wtap_file_type_subtype_short_string(i);
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captypes[i].lstr = wtap_file_type_subtype_string(i);
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list = g_slist_insert_sorted(list, &captypes[i], string_compare);
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}
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}
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g_slist_foreach(list, string_elem_print, NULL);
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g_slist_free(list);
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g_free(captypes);
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}
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static void
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list_encap_types(void) {
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int i;
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struct string_elem *encaps;
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GSList *list = NULL;
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encaps = g_new(struct string_elem,WTAP_NUM_ENCAP_TYPES);
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fprintf(stderr, "mergecap: The available encapsulation types for the \"-T\" flag are:\n");
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for (i = 0; i < WTAP_NUM_ENCAP_TYPES; i++) {
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encaps[i].sstr = wtap_encap_short_string(i);
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if (encaps[i].sstr != NULL) {
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encaps[i].lstr = wtap_encap_string(i);
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list = g_slist_insert_sorted(list, &encaps[i], string_nat_compare);
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}
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}
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g_slist_foreach(list, string_elem_print, NULL);
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g_slist_free(list);
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g_free(encaps);
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}
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static void
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get_mergecap_compiled_info(GString *str)
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{
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/* LIBZ */
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g_string_append(str, ", ");
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#ifdef HAVE_LIBZ
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g_string_append(str, "with libz ");
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#ifdef ZLIB_VERSION
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g_string_append(str, ZLIB_VERSION);
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#else /* ZLIB_VERSION */
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g_string_append(str, "(version unknown)");
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#endif /* ZLIB_VERSION */
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#else /* HAVE_LIBZ */
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g_string_append(str, "without libz");
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#endif /* HAVE_LIBZ */
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}
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static void
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get_mergecap_runtime_info(GString *str)
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{
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/* zlib */
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#if defined(HAVE_LIBZ) && !defined(_WIN32)
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g_string_append_printf(str, ", with libz %s", zlibVersion());
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#endif
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}
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int
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main(int argc, char *argv[])
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{
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GString *comp_info_str;
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GString *runtime_info_str;
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int opt;
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DIAG_OFF(cast-qual)
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static const struct option long_options[] = {
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{(char *)"help", no_argument, NULL, 'h'},
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{(char *)"version", no_argument, NULL, 'V'},
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{0, 0, 0, 0 }
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};
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DIAG_ON(cast-qual)
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gboolean do_append = FALSE;
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gboolean verbose = FALSE;
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int in_file_count = 0;
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guint snaplen = 0;
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#ifdef PCAP_NG_DEFAULT
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int file_type = WTAP_FILE_TYPE_SUBTYPE_PCAPNG; /* default to pcap format */
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#else
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int file_type = WTAP_FILE_TYPE_SUBTYPE_PCAP; /* default to pcapng format */
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#endif
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int frame_type = -2;
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int out_fd;
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merge_in_file_t *in_files = NULL, *in_file;
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int i;
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struct wtap_pkthdr *phdr, snap_phdr;
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wtap_dumper *pdh;
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int open_err, read_err = 0, write_err, close_err;
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gchar *err_info, *write_err_info = NULL;
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int err_fileno;
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char *out_filename = NULL;
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gboolean got_read_error = FALSE, got_write_error = FALSE;
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int count;
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cmdarg_err_init(mergecap_cmdarg_err, mergecap_cmdarg_err_cont);
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#ifdef _WIN32
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arg_list_utf_16to8(argc, argv);
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create_app_running_mutex();
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#endif /* _WIN32 */
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/* Get the compile-time version information string */
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comp_info_str = get_compiled_version_info(NULL, get_mergecap_compiled_info);
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/* Get the run-time version information string */
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runtime_info_str = get_runtime_version_info(get_mergecap_runtime_info);
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/* Add it to the information to be reported on a crash. */
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ws_add_crash_info("Mergecap (Wireshark) %s\n"
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"\n"
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"%s"
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"\n"
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"%s",
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get_ws_vcs_version_info(), comp_info_str->str, runtime_info_str->str);
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/* Process the options first */
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while ((opt = getopt_long(argc, argv, "aF:hs:T:vVw:", long_options, NULL)) != -1) {
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switch (opt) {
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case 'a':
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do_append = !do_append;
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break;
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case 'F':
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file_type = wtap_short_string_to_file_type_subtype(optarg);
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if (file_type < 0) {
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fprintf(stderr, "mergecap: \"%s\" isn't a valid capture file type\n",
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optarg);
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list_capture_types();
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exit(1);
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}
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break;
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case 'h':
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printf("Mergecap (Wireshark) %s\n"
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"Merge two or more capture files into one.\n"
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"See http://www.wireshark.org for more information.\n",
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get_ws_vcs_version_info());
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print_usage(stdout);
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exit(0);
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break;
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case 's':
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snaplen = get_positive_int(optarg, "snapshot length");
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break;
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case 'T':
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frame_type = wtap_short_string_to_encap(optarg);
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if (frame_type < 0) {
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fprintf(stderr, "mergecap: \"%s\" isn't a valid encapsulation type\n",
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optarg);
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list_encap_types();
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exit(1);
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}
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break;
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case 'v':
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verbose = TRUE;
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break;
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case 'V':
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show_version("Mergecap (Wireshark)", comp_info_str, runtime_info_str);
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g_string_free(comp_info_str, TRUE);
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g_string_free(runtime_info_str, TRUE);
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exit(0);
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break;
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case 'w':
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out_filename = optarg;
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break;
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case '?': /* Bad options if GNU getopt */
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switch(optopt) {
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case'F':
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list_capture_types();
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break;
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case'T':
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list_encap_types();
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break;
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default:
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print_usage(stderr);
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}
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exit(1);
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break;
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}
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}
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/* check for proper args; at a minimum, must have an output
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* filename and one input file
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*/
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in_file_count = argc - optind;
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if (!out_filename) {
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fprintf(stderr, "mergecap: an output filename must be set with -w\n");
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fprintf(stderr, " run with -h for help\n");
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return 1;
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}
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if (in_file_count < 1) {
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fprintf(stderr, "mergecap: No input files were specified\n");
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return 1;
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}
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/* open the input files */
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if (!merge_open_in_files(in_file_count, &argv[optind], &in_files,
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&open_err, &err_info, &err_fileno)) {
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fprintf(stderr, "mergecap: Can't open %s: %s\n", argv[optind + err_fileno],
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wtap_strerror(open_err));
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if (err_info != NULL) {
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fprintf(stderr, "(%s)\n", err_info);
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g_free(err_info);
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}
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return 2;
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}
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if (verbose) {
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for (i = 0; i < in_file_count; i++)
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fprintf(stderr, "mergecap: %s is type %s.\n", argv[optind + i],
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wtap_file_type_subtype_string(wtap_file_type_subtype(in_files[i].wth)));
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}
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if (snaplen == 0) {
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/*
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* Snapshot length not specified - default to the maximum of the
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* snapshot lengths of the input files.
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*/
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snaplen = merge_max_snapshot_length(in_file_count, in_files);
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}
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/* set the outfile frame type */
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if (frame_type == -2) {
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/*
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* Default to the appropriate frame type for the input files.
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*/
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frame_type = merge_select_frame_type(in_file_count, in_files);
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if (verbose) {
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if (frame_type == WTAP_ENCAP_PER_PACKET) {
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/*
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* Find out why we had to choose WTAP_ENCAP_PER_PACKET.
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*/
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int first_frame_type, this_frame_type;
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first_frame_type = wtap_file_encap(in_files[0].wth);
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for (i = 1; i < in_file_count; i++) {
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this_frame_type = wtap_file_encap(in_files[i].wth);
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if (first_frame_type != this_frame_type) {
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fprintf(stderr, "mergecap: multiple frame encapsulation types detected\n");
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fprintf(stderr, " defaulting to WTAP_ENCAP_PER_PACKET\n");
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fprintf(stderr, " %s had type %s (%s)\n",
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in_files[0].filename,
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wtap_encap_string(first_frame_type),
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wtap_encap_short_string(first_frame_type));
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fprintf(stderr, " %s had type %s (%s)\n",
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in_files[i].filename,
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wtap_encap_string(this_frame_type),
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wtap_encap_short_string(this_frame_type));
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break;
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}
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}
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}
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fprintf(stderr, "mergecap: selected frame_type %s (%s)\n",
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wtap_encap_string(frame_type),
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wtap_encap_short_string(frame_type));
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}
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}
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/* open the outfile */
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if (strncmp(out_filename, "-", 2) == 0) {
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/* use stdout as the outfile */
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out_fd = 1 /*stdout*/;
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} else {
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/* open the outfile */
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out_fd = ws_open(out_filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
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if (out_fd == -1) {
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fprintf(stderr, "mergecap: Couldn't open output file %s: %s\n",
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out_filename, g_strerror(errno));
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exit(1);
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}
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}
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/* prepare the outfile */
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if(file_type == WTAP_FILE_TYPE_SUBTYPE_PCAPNG ){
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wtapng_section_t *shb_hdr;
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GString *comment_gstr;
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wtapng_iface_descriptions_t *idb_inf = NULL, *idb_inf_merge_file;
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wtapng_if_descr_t int_data, *file_int_data;
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guint itf_count, itf_id = 0;
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shb_hdr = g_new(wtapng_section_t,1);
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comment_gstr = g_string_new("File created by merging: \n");
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for (i = 0; i < in_file_count; i++) {
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g_string_append_printf(comment_gstr, "File%d: %s \n",i+1,in_files[i].filename);
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}
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shb_hdr->section_length = -1;
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/* options */
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shb_hdr->opt_comment = comment_gstr->str; /* NULL if not available */
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shb_hdr->shb_hardware = NULL; /* NULL if not available, UTF-8 string containing the description of the hardware used to create this section. */
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shb_hdr->shb_os = NULL; /* NULL if not available, UTF-8 string containing the name of the operating system used to create this section. */
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shb_hdr->shb_user_appl = g_strdup("mergecap"); /* NULL if not available, UTF-8 string containing the name of the application used to create this section. */
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if (frame_type == WTAP_ENCAP_PER_PACKET) {
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/* create fake IDB info */
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idb_inf = g_new(wtapng_iface_descriptions_t,1);
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/* TODO make this the number of DIFFERENT encapsulation types
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* check that snaplength is the same too?
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*/
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idb_inf->interface_data = g_array_new(FALSE, FALSE, sizeof(wtapng_if_descr_t));
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for (i = 0; i < in_file_count; i++) {
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idb_inf_merge_file = wtap_file_get_idb_info(in_files[i].wth);
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for (itf_count = 0; itf_count < idb_inf_merge_file->interface_data->len; itf_count++) {
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/* read the interface data from the in file to our combined interface data */
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file_int_data = &g_array_index (idb_inf_merge_file->interface_data, wtapng_if_descr_t, itf_count);
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int_data.wtap_encap = file_int_data->wtap_encap;
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int_data.time_units_per_second = file_int_data->time_units_per_second;
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int_data.link_type = file_int_data->link_type;
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int_data.snap_len = file_int_data->snap_len;
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int_data.if_name = g_strdup(file_int_data->if_name);
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int_data.opt_comment = NULL;
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int_data.if_description = NULL;
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int_data.if_speed = 0;
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int_data.if_tsresol = 6;
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int_data.if_filter_str = NULL;
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int_data.bpf_filter_len = 0;
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int_data.if_filter_bpf_bytes = NULL;
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int_data.if_os = NULL;
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int_data.if_fcslen = -1;
|
|
int_data.num_stat_entries = 0; /* Number of ISB:s */
|
|
int_data.interface_statistics = NULL;
|
|
|
|
g_array_append_val(idb_inf->interface_data, int_data);
|
|
}
|
|
g_free(idb_inf_merge_file);
|
|
|
|
/* Set fake interface Id in per file data */
|
|
in_files[i].interface_id = itf_id;
|
|
itf_id += itf_count;
|
|
}
|
|
}
|
|
|
|
pdh = wtap_dump_fdopen_ng(out_fd, file_type, frame_type, snaplen,
|
|
FALSE /* compressed */, shb_hdr, idb_inf, &open_err);
|
|
g_string_free(comment_gstr, TRUE);
|
|
} else {
|
|
pdh = wtap_dump_fdopen(out_fd, file_type, frame_type, snaplen, FALSE /* compressed */, &open_err);
|
|
}
|
|
if (pdh == NULL) {
|
|
merge_close_in_files(in_file_count, in_files);
|
|
g_free(in_files);
|
|
fprintf(stderr, "mergecap: Can't open or create %s: %s\n", out_filename,
|
|
wtap_strerror(open_err));
|
|
exit(1);
|
|
}
|
|
|
|
/* do the merge (or append) */
|
|
count = 1;
|
|
for (;;) {
|
|
if (do_append)
|
|
in_file = merge_append_read_packet(in_file_count, in_files, &read_err,
|
|
&err_info);
|
|
else
|
|
in_file = merge_read_packet(in_file_count, in_files, &read_err,
|
|
&err_info);
|
|
if (in_file == NULL) {
|
|
/* EOF */
|
|
break;
|
|
}
|
|
|
|
if (read_err != 0) {
|
|
/* I/O error reading from in_file */
|
|
got_read_error = TRUE;
|
|
break;
|
|
}
|
|
|
|
if (verbose)
|
|
fprintf(stderr, "Record: %d\n", count++);
|
|
|
|
/* We simply write it, perhaps after truncating it; we could do other
|
|
* things, like modify it. */
|
|
phdr = wtap_phdr(in_file->wth);
|
|
if (snaplen != 0 && phdr->caplen > snaplen) {
|
|
snap_phdr = *phdr;
|
|
snap_phdr.caplen = snaplen;
|
|
phdr = &snap_phdr;
|
|
}
|
|
if ((file_type == WTAP_FILE_TYPE_SUBTYPE_PCAPNG) && (frame_type == WTAP_ENCAP_PER_PACKET)) {
|
|
if (phdr->presence_flags & WTAP_HAS_INTERFACE_ID) {
|
|
phdr->interface_id += in_file->interface_id;
|
|
} else {
|
|
phdr->interface_id = in_file->interface_id;
|
|
phdr->presence_flags = phdr->presence_flags | WTAP_HAS_INTERFACE_ID;
|
|
}
|
|
}
|
|
|
|
if (!wtap_dump(pdh, phdr, wtap_buf_ptr(in_file->wth), &write_err, &write_err_info)) {
|
|
got_write_error = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
merge_close_in_files(in_file_count, in_files);
|
|
if (!got_write_error) {
|
|
if (!wtap_dump_close(pdh, &write_err))
|
|
got_write_error = TRUE;
|
|
} else {
|
|
/*
|
|
* We already got a write error; no need to report another
|
|
* write error on close.
|
|
*
|
|
* Don't overwrite the earlier write error.
|
|
*/
|
|
(void)wtap_dump_close(pdh, &close_err);
|
|
}
|
|
|
|
if (got_read_error) {
|
|
/*
|
|
* Find the file on which we got the error, and report the error.
|
|
*/
|
|
for (i = 0; i < in_file_count; i++) {
|
|
if (in_files[i].state == GOT_ERROR) {
|
|
fprintf(stderr, "mergecap: Error reading %s: %s\n",
|
|
in_files[i].filename, wtap_strerror(read_err));
|
|
if (err_info != NULL) {
|
|
fprintf(stderr, "(%s)\n", err_info);
|
|
g_free(err_info);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (got_write_error) {
|
|
switch (write_err) {
|
|
|
|
case WTAP_ERR_UNWRITABLE_ENCAP:
|
|
/*
|
|
* This is a problem with the particular frame we're writing and
|
|
* the file type and subtype we're wwriting; note that, and
|
|
* report the frame number and file type/subtype.
|
|
*/
|
|
fprintf(stderr, "mergecap: Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
|
|
in_file ? in_file->packet_num : 0, in_file ? in_file->filename : "UNKNOWN",
|
|
wtap_file_type_subtype_string(file_type));
|
|
break;
|
|
|
|
case WTAP_ERR_PACKET_TOO_LARGE:
|
|
/*
|
|
* This is a problem with the particular frame we're writing and
|
|
* the file type and subtype we're wwriting; note that, and
|
|
* report the frame number and file type/subtype.
|
|
*/
|
|
fprintf(stderr, "mergecap: Frame %u of \"%s\" is too large for a \"%s\" file.\n",
|
|
in_file ? in_file->packet_num : 0, in_file ? in_file->filename : "UNKNOWN",
|
|
wtap_file_type_subtype_string(file_type));
|
|
break;
|
|
|
|
case WTAP_ERR_UNWRITABLE_REC_TYPE:
|
|
/*
|
|
* This is a problem with the particular record we're writing and
|
|
* the file type and subtype we're wwriting; note that, and
|
|
* report the record number and file type/subtype.
|
|
*/
|
|
fprintf(stderr, "mergecap: Record %u of \"%s\" has a record type that can't be saved in a \"%s\" file.\n",
|
|
in_file ? in_file->packet_num : 0, in_file ? in_file->filename : "UNKNOWN",
|
|
wtap_file_type_subtype_string(file_type));
|
|
break;
|
|
|
|
case WTAP_ERR_UNWRITABLE_REC_DATA:
|
|
/*
|
|
* This is a problem with the particular record we're writing and
|
|
* the file type and subtype we're wwriting; note that, and
|
|
* report the record number and file type/subtype.
|
|
*/
|
|
fprintf(stderr, "mergecap: Record %u of \"%s\" has data that can't be saved in a \"%s\" file.\n(%s)\n",
|
|
in_file ? in_file->packet_num : 0, in_file ? in_file->filename : "UNKNOWN",
|
|
wtap_file_type_subtype_string(file_type),
|
|
write_err_info != NULL ? write_err_info : "no information supplied");
|
|
g_free(write_err_info);
|
|
break;
|
|
|
|
default:
|
|
fprintf(stderr, "mergecap: Error writing to outfile: %s\n",
|
|
wtap_strerror(write_err));
|
|
break;
|
|
}
|
|
}
|
|
|
|
g_free(in_files);
|
|
|
|
return (!got_read_error && !got_write_error) ? 0 : 2;
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 2
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=2 tabstop=8 expandtab:
|
|
* :indentSize=2:tabSize=8:noTabs=true:
|
|
*/
|
|
|