diff options
Diffstat (limited to 'randpkt.c')
| -rw-r--r-- | randpkt.c | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/randpkt.c b/randpkt.c new file mode 100644 index 00000000..77e2d884 --- /dev/null +++ b/randpkt.c @@ -0,0 +1,319 @@ +/* + * randpkt.c + * --------- + * Creates random packet traces. Useful for debugging sniffers by testing + * assumptions about the veracity of the data found in the packet. + * + * Copyright (C) 1999 by Gilbert Ramirez <gram@alumni.rice.edu> + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include <config.h> +#define WS_LOG_DOMAIN LOG_DOMAIN_MAIN + +#include <glib.h> + +#include <stdio.h> +#include <stdlib.h> + +#include <ws_exit_codes.h> +#include <wsutil/clopts_common.h> +#include <ui/failure_message.h> +#include <wsutil/cmdarg_err.h> +#include <wsutil/file_util.h> +#include <wsutil/filesystem.h> +#include <wsutil/privileges.h> +#include <cli_main.h> + +#ifdef HAVE_PLUGINS +#include <wsutil/plugins.h> +#endif + +#include <wsutil/report_message.h> +#include <wsutil/wslog.h> + +#include <wsutil/ws_getopt.h> +#include <wsutil/version_info.h> + +#include "randpkt_core/randpkt_core.h" + +/* Additional exit codes */ +#define INVALID_TYPE 2 +#define CLOSE_ERROR 2 + +static void +list_capture_types(void) { + GArray *writable_type_subtypes; + + cmdarg_err("The available capture file types for the \"-F\" flag are:\n"); + writable_type_subtypes = wtap_get_writable_file_types_subtypes(FT_SORT_BY_NAME); + for (guint i = 0; i < writable_type_subtypes->len; i++) { + int ft = g_array_index(writable_type_subtypes, int, i); + fprintf(stderr, " %s - %s\n", wtap_file_type_subtype_name(ft), + wtap_file_type_subtype_description(ft)); + } + g_array_free(writable_type_subtypes, TRUE); +} + +/* + * Report an error in command-line arguments. + */ +static void +randpkt_cmdarg_err(const char *msg_format, va_list ap) +{ + fprintf(stderr, "randpkt: "); + vfprintf(stderr, msg_format, ap); + fprintf(stderr, "\n"); +} + +/* + * Report additional information for an error in command-line arguments. + */ +static void +randpkt_cmdarg_err_cont(const char *msg_format, va_list ap) +{ + vfprintf(stderr, msg_format, ap); + fprintf(stderr, "\n"); +} + +/* Print usage statement and exit program */ +static void +usage(gboolean is_error) +{ + FILE *output; + char** abbrev_list; + char** longname_list; + unsigned i = 0; + + if (!is_error) { + output = stdout; + } + else { + output = stderr; + } + + fprintf(output, "Usage: randpkt [options] <outfile>\n"); + fprintf(output, "\n"); + fprintf(output, "Options:\n"); + fprintf(output, " -b maximum bytes per packet (default: 5000)\n"); + fprintf(output, " -c packet count (default: 1000)\n"); + fprintf(output, " -F output file type (default: pcapng)\n"); + fprintf(output, " an empty \"-F\" option will list the file types\n"); + fprintf(output, " -r select a different random type for each packet\n"); + fprintf(output, " -t packet type\n"); + fprintf(output, " -h, --help display this help and exit.\n"); + fprintf(output, " -v, --version print version information and exit.\n"); + fprintf(output, "\n"); + fprintf(output, "Types:\n"); + + /* Get the examples list */ + randpkt_example_list(&abbrev_list, &longname_list); + while (abbrev_list[i] && longname_list[i]) { + fprintf(output, "\t%-16s%s\n", abbrev_list[i], longname_list[i]); + i++; + } + + g_strfreev(abbrev_list); + g_strfreev(longname_list); + + fprintf(output, "\nIf type is not specified, a random packet type will be chosen\n\n"); +} + +int +main(int argc, char *argv[]) +{ + char *configuration_init_error; + static const struct report_message_routines randpkt_report_routines = { + failure_message, + failure_message, + open_failure_message, + read_failure_message, + write_failure_message, + cfile_open_failure_message, + cfile_dump_open_failure_message, + cfile_read_failure_message, + cfile_write_failure_message, + cfile_close_failure_message + }; + int opt; + int produce_type = -1; + char *produce_filename = NULL; + int produce_max_bytes = 5000; + int produce_count = 1000; + int file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_UNKNOWN; + randpkt_example *example; + guint8* type = NULL; + int allrandom = FALSE; + wtap_dumper *savedump; + int ret = EXIT_SUCCESS; + static const struct ws_option long_options[] = { + {"help", ws_no_argument, NULL, 'h'}, + {"version", ws_no_argument, NULL, 'v'}, + {0, 0, 0, 0 } + }; + + cmdarg_err_init(randpkt_cmdarg_err, randpkt_cmdarg_err_cont); + + /* Initialize log handler early so we can have proper logging during startup. */ + ws_log_init("randpkt", vcmdarg_err); + + /* Early logging command-line initialization. */ + ws_log_parse_args(&argc, argv, vcmdarg_err, WS_EXIT_INVALID_OPTION); + + ws_noisy("Finished log init and parsing command line log arguments"); + + /* + * Get credential information for later use. + */ + init_process_policies(); + + /* + * Attempt to get the pathname of the directory containing the + * executable file. + */ + configuration_init_error = configuration_init(argv[0], NULL); + if (configuration_init_error != NULL) { + fprintf(stderr, + "capinfos: Can't get pathname of directory containing the capinfos program: %s.\n", + configuration_init_error); + g_free(configuration_init_error); + } + + init_report_message("randpkt", &randpkt_report_routines); + + wtap_init(TRUE); + +#ifdef _WIN32 + create_app_running_mutex(); +#endif /* _WIN32 */ + + ws_init_version_info("Randpkt", NULL, NULL); + + while ((opt = ws_getopt_long(argc, argv, "b:c:F:ht:rv", long_options, NULL)) != -1) { + switch (opt) { + case 'b': /* max bytes */ + produce_max_bytes = get_positive_int(ws_optarg, "max bytes"); + if (produce_max_bytes > 65536) { + cmdarg_err("max bytes is > 65536"); + ret = WS_EXIT_INVALID_OPTION; + goto clean_exit; + } + break; + + case 'c': /* count */ + produce_count = get_positive_int(ws_optarg, "count"); + break; + + case 'F': + file_type_subtype = wtap_name_to_file_type_subtype(ws_optarg); + if (file_type_subtype < 0) { + cmdarg_err("\"%s\" isn't a valid capture file type", ws_optarg); + list_capture_types(); + return WS_EXIT_INVALID_OPTION; + } + break; + + case 't': /* type of packet to produce */ + type = g_strdup(ws_optarg); + break; + + case 'h': + show_help_header(NULL); + usage(FALSE); + goto clean_exit; + break; + + case 'r': + allrandom = TRUE; + break; + + case 'v': + show_version(); + goto clean_exit; + break; + + case '?': + switch(ws_optopt) { + case 'F': + list_capture_types(); + return WS_EXIT_INVALID_OPTION; + break; + } + /* FALLTHROUGH */ + + default: + usage(TRUE); + ret = WS_EXIT_INVALID_OPTION; + goto clean_exit; + break; + } + } + + /* any more command line parameters? */ + if (argc > ws_optind) { + produce_filename = argv[ws_optind]; + } else { + usage(TRUE); + ret = WS_EXIT_INVALID_OPTION; + goto clean_exit; + } + + if (file_type_subtype == WTAP_FILE_TYPE_SUBTYPE_UNKNOWN) { + file_type_subtype = wtap_pcapng_file_type_subtype(); + } + + if (!allrandom) { + produce_type = randpkt_parse_type(type); + g_free(type); + + example = randpkt_find_example(produce_type); + if (!example) { + ret = WS_EXIT_INVALID_OPTION; + goto clean_exit; + } + + ret = randpkt_example_init(example, produce_filename, produce_max_bytes, file_type_subtype); + if (ret != EXIT_SUCCESS) + goto clean_exit; + randpkt_loop(example, produce_count, 0); + } else { + if (type) { + fprintf(stderr, "Can't set type in random mode\n"); + ret = INVALID_TYPE; + goto clean_exit; + } + + produce_type = randpkt_parse_type(NULL); + example = randpkt_find_example(produce_type); + if (!example) { + ret = WS_EXIT_INVALID_OPTION; + goto clean_exit; + } + ret = randpkt_example_init(example, produce_filename, produce_max_bytes, file_type_subtype); + if (ret != EXIT_SUCCESS) + goto clean_exit; + + while (produce_count-- > 0) { + randpkt_loop(example, 1, 0); + produce_type = randpkt_parse_type(NULL); + + savedump = example->dump; + + example = randpkt_find_example(produce_type); + if (!example) { + ret = WS_EXIT_INVALID_OPTION; + goto clean_exit; + } + example->dump = savedump; + example->filename = produce_filename; + } + } + if (!randpkt_example_close(example)) { + ret = CLOSE_ERROR; + } + +clean_exit: + wtap_cleanup(); + return ret; +} |