![John Thacker](/assets/img/avatar_default.png)
Related to #18009 - Have randpkt default to pcapng, allow selecting a different capture file format via the common -F option that other command line tools use, and document it. For the randpktdump extcap, just use pcapng. This fixes --all-random, because --all-random requires different encapsulation per packet. It also fixes the related -r option to randpkt (though note that picking a file format that doesn't support ENCAP_PER_PACKET with -r causes problems.) Document -r in the randpkt man page. Fix #18944
304 lines
8.4 KiB
C
304 lines
8.4 KiB
C
/*
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* randpkt.c
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* ---------
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* Creates random packet traces. Useful for debugging sniffers by testing
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* assumptions about the veracity of the data found in the packet.
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*
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* Copyright (C) 1999 by Gilbert Ramirez <gram@alumni.rice.edu>
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include <config.h>
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#define WS_LOG_DOMAIN LOG_DOMAIN_MAIN
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#include <glib.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <ws_exit_codes.h>
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#include <wsutil/clopts_common.h>
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#include <ui/failure_message.h>
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#include <wsutil/cmdarg_err.h>
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#include <wsutil/file_util.h>
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#include <wsutil/filesystem.h>
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#include <wsutil/privileges.h>
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#include <cli_main.h>
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#ifdef HAVE_PLUGINS
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#include <wsutil/plugins.h>
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#endif
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#include <wsutil/report_message.h>
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#include <wsutil/wslog.h>
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#include <wsutil/ws_getopt.h>
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#include "randpkt_core/randpkt_core.h"
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/* Additional exit codes */
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#define INVALID_TYPE 2
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#define CLOSE_ERROR 2
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static void
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list_capture_types(void) {
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GArray *writable_type_subtypes;
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cmdarg_err("The available capture file types for the \"-F\" flag are:\n");
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writable_type_subtypes = wtap_get_writable_file_types_subtypes(FT_SORT_BY_NAME);
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for (guint i = 0; i < writable_type_subtypes->len; i++) {
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int ft = g_array_index(writable_type_subtypes, int, i);
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fprintf(stderr, " %s - %s\n", wtap_file_type_subtype_name(ft),
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wtap_file_type_subtype_description(ft));
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}
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g_array_free(writable_type_subtypes, TRUE);
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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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randpkt_cmdarg_err(const char *msg_format, va_list ap)
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{
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fprintf(stderr, "randpkt: ");
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vfprintf(stderr, msg_format, 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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randpkt_cmdarg_err_cont(const char *msg_format, va_list ap)
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{
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vfprintf(stderr, msg_format, ap);
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fprintf(stderr, "\n");
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}
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/* Print usage statement and exit program */
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static void
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usage(gboolean is_error)
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{
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FILE *output;
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char** abbrev_list;
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char** longname_list;
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unsigned i = 0;
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if (!is_error) {
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output = stdout;
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}
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else {
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output = stderr;
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}
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fprintf(output, "Usage: randpkt [-b maxbytes] [-c count] [-t type] [-r] [-F output file type] filename\n");
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fprintf(output, "Default max bytes (per packet) is 5000\n");
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fprintf(output, "Default count is 1000.\n");
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fprintf(output, "Default output file type is pcapng.\n");
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fprintf(output, "-r: random packet type selection\n");
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fprintf(output, "\n");
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fprintf(output, "Types:\n");
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/* Get the examples list */
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randpkt_example_list(&abbrev_list, &longname_list);
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while (abbrev_list[i] && longname_list[i]) {
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fprintf(output, "\t%-16s%s\n", abbrev_list[i], longname_list[i]);
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i++;
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}
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g_strfreev(abbrev_list);
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g_strfreev(longname_list);
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fprintf(output, "\nIf type is not specified, a random packet will be chosen\n\n");
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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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char *configuration_init_error;
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static const struct report_message_routines randpkt_report_routines = {
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failure_message,
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failure_message,
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open_failure_message,
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read_failure_message,
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write_failure_message,
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cfile_open_failure_message,
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cfile_dump_open_failure_message,
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cfile_read_failure_message,
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cfile_write_failure_message,
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cfile_close_failure_message
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};
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int opt;
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int produce_type = -1;
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char *produce_filename = NULL;
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int produce_max_bytes = 5000;
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int produce_count = 1000;
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int file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_UNKNOWN;
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randpkt_example *example;
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guint8* type = NULL;
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int allrandom = FALSE;
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wtap_dumper *savedump;
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int ret = EXIT_SUCCESS;
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static const struct ws_option long_options[] = {
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{"help", ws_no_argument, NULL, 'h'},
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{0, 0, 0, 0 }
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};
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cmdarg_err_init(randpkt_cmdarg_err, randpkt_cmdarg_err_cont);
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/* Initialize log handler early so we can have proper logging during startup. */
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ws_log_init("randpkt", vcmdarg_err);
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/* Early logging command-line initialization. */
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ws_log_parse_args(&argc, argv, vcmdarg_err, WS_EXIT_INVALID_OPTION);
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ws_noisy("Finished log init and parsing command line log arguments");
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/*
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* Get credential information for later use.
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*/
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init_process_policies();
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/*
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* Attempt to get the pathname of the directory containing the
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* executable file.
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*/
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configuration_init_error = configuration_init(argv[0], NULL);
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if (configuration_init_error != NULL) {
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fprintf(stderr,
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"capinfos: Can't get pathname of directory containing the capinfos program: %s.\n",
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configuration_init_error);
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g_free(configuration_init_error);
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}
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init_report_message("randpkt", &randpkt_report_routines);
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wtap_init(TRUE);
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#ifdef _WIN32
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create_app_running_mutex();
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#endif /* _WIN32 */
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while ((opt = ws_getopt_long(argc, argv, "b:c:F:ht:r", long_options, NULL)) != -1) {
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switch (opt) {
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case 'b': /* max bytes */
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produce_max_bytes = get_positive_int(ws_optarg, "max bytes");
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if (produce_max_bytes > 65536) {
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cmdarg_err("max bytes is > 65536");
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ret = WS_EXIT_INVALID_OPTION;
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goto clean_exit;
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}
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break;
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case 'c': /* count */
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produce_count = get_positive_int(ws_optarg, "count");
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break;
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case 'F':
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file_type_subtype = wtap_name_to_file_type_subtype(ws_optarg);
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if (file_type_subtype < 0) {
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cmdarg_err("\"%s\" isn't a valid capture file type", ws_optarg);
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list_capture_types();
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return WS_EXIT_INVALID_OPTION;
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}
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break;
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case 't': /* type of packet to produce */
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type = g_strdup(ws_optarg);
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break;
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case 'h':
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usage(FALSE);
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goto clean_exit;
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break;
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case 'r':
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allrandom = TRUE;
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break;
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case '?':
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switch(ws_optopt) {
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case 'F':
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list_capture_types();
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return WS_EXIT_INVALID_OPTION;
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break;
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}
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/* FALLTHROUGH */
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default:
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usage(TRUE);
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ret = WS_EXIT_INVALID_OPTION;
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goto clean_exit;
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break;
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}
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}
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/* any more command line parameters? */
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if (argc > ws_optind) {
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produce_filename = argv[ws_optind];
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} else {
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usage(TRUE);
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ret = WS_EXIT_INVALID_OPTION;
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goto clean_exit;
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}
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if (file_type_subtype == WTAP_FILE_TYPE_SUBTYPE_UNKNOWN) {
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file_type_subtype = wtap_pcapng_file_type_subtype();
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}
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if (!allrandom) {
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produce_type = randpkt_parse_type(type);
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g_free(type);
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example = randpkt_find_example(produce_type);
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if (!example) {
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ret = WS_EXIT_INVALID_OPTION;
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goto clean_exit;
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}
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ret = randpkt_example_init(example, produce_filename, produce_max_bytes, file_type_subtype);
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if (ret != EXIT_SUCCESS)
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goto clean_exit;
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randpkt_loop(example, produce_count, 0);
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} else {
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if (type) {
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fprintf(stderr, "Can't set type in random mode\n");
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ret = INVALID_TYPE;
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goto clean_exit;
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}
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produce_type = randpkt_parse_type(NULL);
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example = randpkt_find_example(produce_type);
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if (!example) {
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ret = WS_EXIT_INVALID_OPTION;
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goto clean_exit;
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}
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ret = randpkt_example_init(example, produce_filename, produce_max_bytes, file_type_subtype);
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if (ret != EXIT_SUCCESS)
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goto clean_exit;
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while (produce_count-- > 0) {
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randpkt_loop(example, 1, 0);
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produce_type = randpkt_parse_type(NULL);
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savedump = example->dump;
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example = randpkt_find_example(produce_type);
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if (!example) {
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ret = WS_EXIT_INVALID_OPTION;
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goto clean_exit;
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}
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example->dump = savedump;
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example->filename = produce_filename;
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}
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}
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if (!randpkt_example_close(example)) {
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ret = CLOSE_ERROR;
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}
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clean_exit:
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wtap_cleanup();
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return ret;
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}
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