diff options
Diffstat (limited to '')
| -rw-r--r-- | tfshark.c | 2100 |
1 files changed, 2100 insertions, 0 deletions
diff --git a/tfshark.c b/tfshark.c new file mode 100644 index 00000000..7410c559 --- /dev/null +++ b/tfshark.c @@ -0,0 +1,2100 @@ +/* tfshark.c + * + * Text-mode variant of Fileshark, based off of TShark, + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include <config.h> + +#define WS_LOG_DOMAIN LOG_DOMAIN_MAIN + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <locale.h> +#include <limits.h> + +#include <ws_exit_codes.h> +#include <wsutil/ws_getopt.h> + +#include <errno.h> + +#include <glib.h> + +#include <epan/exceptions.h> +#include <epan/epan.h> + +#include <wsutil/clopts_common.h> +#include <wsutil/cmdarg_err.h> +#include <ui/urls.h> +#include <wsutil/filesystem.h> +#include <wsutil/file_util.h> +#include <wsutil/privileges.h> +#include <wsutil/report_message.h> +#include <wsutil/wslog.h> +#include <wsutil/ws_assert.h> +#include <cli_main.h> +#include <wsutil/version_info.h> + +#include "globals.h" +#include <epan/timestamp.h> +#include <epan/packet.h> +#ifdef HAVE_LUA +#include <epan/wslua/init_wslua.h> +#endif +#include "file.h" +#include "frame_tvbuff.h" +#include <epan/disabled_protos.h> +#include <epan/prefs.h> +#include <epan/column.h> +#include <epan/print.h> +#include <epan/addr_resolv.h> +#include "ui/util.h" +#include "ui/decode_as_utils.h" +#include "ui/dissect_opts.h" +#include "ui/failure_message.h" +#include <epan/epan_dissect.h> +#include <epan/tap.h> +#include <epan/stat_tap_ui.h> +#include <epan/ex-opt.h> + +#include <wiretap/wtap-int.h> +#include <wiretap/file_wrappers.h> + +#include <epan/funnel.h> + +#ifdef HAVE_PLUGINS +#include <wsutil/plugins.h> +#endif + +/* Additional exit codes */ +#define NO_FILE_SPECIFIED 1 + +capture_file cfile; + +static guint32 cum_bytes; +static frame_data ref_frame; +static frame_data prev_dis_frame; +static frame_data prev_cap_frame; + +static gboolean prefs_loaded = FALSE; + +static gboolean perform_two_pass_analysis; + +/* + * The way the packet decode is to be written. + */ +typedef enum { + WRITE_TEXT, /* summary or detail text */ + WRITE_XML, /* PDML or PSML */ + WRITE_FIELDS /* User defined list of fields */ + /* Add CSV and the like here */ +} output_action_e; + +static output_action_e output_action; +static gboolean do_dissection; /* TRUE if we have to dissect each packet */ +static gboolean print_packet_info; /* TRUE if we're to print packet information */ +static gint print_summary = -1; /* TRUE if we're to print packet summary information */ +static gboolean print_details; /* TRUE if we're to print packet details information */ +static gboolean print_hex; /* TRUE if we're to print hex/ascci information */ +static gboolean line_buffered; +static gboolean really_quiet = FALSE; + +static print_format_e print_format = PR_FMT_TEXT; +static print_stream_t *print_stream; + +static output_fields_t* output_fields = NULL; + +/* The line separator used between packets, changeable via the -S option */ +static const char *separator = ""; + +static gboolean process_file(capture_file *, int, gint64); +static gboolean process_packet_single_pass(capture_file *cf, + epan_dissect_t *edt, gint64 offset, wtap_rec *rec, + const guchar *pd); +static void show_print_file_io_error(int err); +static gboolean write_preamble(capture_file *cf); +static gboolean print_packet(capture_file *cf, epan_dissect_t *edt); +static gboolean write_finale(void); + +static void tfshark_cmdarg_err(const char *msg_format, va_list ap); +static void tfshark_cmdarg_err_cont(const char *msg_format, va_list ap); + +static GHashTable *output_only_tables = NULL; + +#if 0 +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 void +string_elem_print(gpointer data, gpointer not_used _U_) +{ + fprintf(stderr, " %s - %s\n", + ((struct string_elem *)data)->sstr, + ((struct string_elem *)data)->lstr); +} +#endif + +static void +print_usage(FILE *output) +{ + fprintf(output, "\n"); + fprintf(output, "Usage: tfshark [options] ...\n"); + fprintf(output, "\n"); + + /*fprintf(output, "\n");*/ + fprintf(output, "Input file:\n"); + fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin)\n"); + + fprintf(output, "\n"); + fprintf(output, "Processing:\n"); + fprintf(output, " -2 perform a two-pass analysis\n"); + fprintf(output, " -R <read filter> packet Read filter in Wireshark display filter syntax\n"); + fprintf(output, " (requires -2)\n"); + fprintf(output, " -Y <display filter> packet displaY filter in Wireshark display filter\n"); + fprintf(output, " syntax\n"); + fprintf(output, " -d %s ...\n", DECODE_AS_ARG_TEMPLATE); + fprintf(output, " \"Decode As\", see the man page for details\n"); + fprintf(output, " Example: tcp.port==8888,http\n"); + + /*fprintf(output, "\n");*/ + fprintf(output, "Output:\n"); + fprintf(output, " -C <config profile> start with specified configuration profile\n"); + fprintf(output, " -V add output of packet tree (Packet Details)\n"); + fprintf(output, " -O <protocols> Only show packet details of these protocols, comma\n"); + fprintf(output, " separated\n"); + fprintf(output, " -S <separator> the line separator to print between packets\n"); + fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n"); + fprintf(output, " -T pdml|ps|psml|text|fields\n"); + fprintf(output, " format of text output (def: text)\n"); + fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port,\n"); + fprintf(output, " _ws.col.info)\n"); + fprintf(output, " this option can be repeated to print multiple fields\n"); + fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n"); + fprintf(output, " header=y|n switch headers on and off\n"); + fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n"); + fprintf(output, " occurrence=f|l|a print first, last or all occurrences of each field\n"); + fprintf(output, " aggregator=,|/s|<char> select comma, space, printable character as\n"); + fprintf(output, " aggregator\n"); + fprintf(output, " quote=d|s|n select double, single, no quotes for values\n"); + fprintf(output, " -t a|ad|d|dd|e|r|u|ud output format of time stamps (def: r: rel. to first)\n"); + fprintf(output, " -u s|hms output format of seconds (def: s: seconds)\n"); + fprintf(output, " -l flush standard output after each packet\n"); + fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n"); + fprintf(output, " -Q only log true errors to stderr (quieter than -q)\n"); + fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n"); + fprintf(output, " -z <statistics> various statistics, see the man page for details\n"); + fprintf(output, "\n"); + + ws_log_print_usage(output); + fprintf(output, "\n"); + + fprintf(output, "Miscellaneous:\n"); + fprintf(output, " -h display this help and exit\n"); + fprintf(output, " -v display version info and exit\n"); + fprintf(output, " -o <name>:<value> ... override preference setting\n"); + fprintf(output, " -K <keytab> keytab file to use for kerberos decryption\n"); + fprintf(output, " -G [report] dump one of several available reports and exit\n"); + fprintf(output, " default report=\"fields\"\n"); + fprintf(output, " use \"-G ?\" for more help\n"); +} + +static void +glossary_option_help(void) +{ + FILE *output; + + output = stdout; + + fprintf(output, "%s\n", get_appname_and_version()); + + fprintf(output, "\n"); + fprintf(output, "Usage: tfshark -G [report]\n"); + fprintf(output, "\n"); + fprintf(output, "Glossary table reports:\n"); + fprintf(output, " -G column-formats dump column format codes and exit\n"); + fprintf(output, " -G decodes dump \"layer type\"/\"decode as\" associations and exit\n"); + fprintf(output, " -G dissector-tables dump dissector table names, types, and properties\n"); + fprintf(output, " -G fields dump fields glossary and exit\n"); + fprintf(output, " -G ftypes dump field type basic and descriptive names\n"); + fprintf(output, " -G heuristic-decodes dump heuristic dissector tables\n"); + fprintf(output, " -G plugins dump installed plugins and exit\n"); + fprintf(output, " -G protocols dump protocols in registration database and exit\n"); + fprintf(output, " -G values dump value, range, true/false strings and exit\n"); + fprintf(output, "\n"); + fprintf(output, "Preference reports:\n"); + fprintf(output, " -G currentprefs dump current preferences and exit\n"); + fprintf(output, " -G defaultprefs dump default preferences and exit\n"); + fprintf(output, "\n"); +} + +static void +print_current_user(void) +{ + gchar *cur_user, *cur_group; + + if (started_with_special_privs()) { + cur_user = get_cur_username(); + cur_group = get_cur_groupname(); + fprintf(stderr, "Running as user \"%s\" and group \"%s\".", + cur_user, cur_group); + g_free(cur_user); + g_free(cur_group); + if (running_with_special_privs()) { + fprintf(stderr, " This could be dangerous."); + } + fprintf(stderr, "\n"); + } +} + +int +main(int argc, char *argv[]) +{ + char *configuration_init_error; + int opt; + static const struct ws_option long_options[] = { + {"help", ws_no_argument, NULL, 'h'}, + {"version", ws_no_argument, NULL, 'v'}, + {0, 0, 0, 0 } + }; + gboolean arg_error = FALSE; + + int err; + volatile gboolean success; + volatile int exit_status = 0; + gboolean quiet = FALSE; + gchar *volatile cf_name = NULL; + gchar *rfilter = NULL; + gchar *dfilter = NULL; + dfilter_t *rfcode = NULL; + dfilter_t *dfcode = NULL; + df_error_t *df_err; + e_prefs *prefs_p; + gchar *output_only = NULL; + + /* + * The leading + ensures that getopt_long() does not permute the argv[] + * entries. + * + * We have to make sure that the first getopt_long() preserves the content + * of argv[] for the subsequent getopt_long() call. + * + * We use getopt_long() in both cases to ensure that we're using a routine + * whose permutation behavior we can control in the same fashion on all + * platforms, and so that, if we ever need to process a long argument before + * doing further initialization, we can do so. + * + * Glibc and Solaris libc document that a leading + disables permutation + * of options, regardless of whether POSIXLY_CORRECT is set or not; *BSD + * and macOS don't document it, but do so anyway. + * + * We do *not* use a leading - because the behavior of a leading - is + * platform-dependent. + */ +#define OPTSTRING "+2C:d:e:E:hK:lo:O:qQr:R:S:t:T:u:vVxX:Y:z:" + + static const char optstring[] = OPTSTRING; + static const struct report_message_routines tfshark_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 + }; + + /* + * Set the C-language locale to the native environment and set the + * code page to UTF-8 on Windows. + */ +#ifdef _WIN32 + setlocale(LC_ALL, ".UTF-8"); +#else + setlocale(LC_ALL, ""); +#endif + + cmdarg_err_init(tfshark_cmdarg_err, tfshark_cmdarg_err_cont); + + /* Initialize log handler early so we can have proper logging during startup. */ + ws_log_init("tfshark", 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"); + +#ifdef _WIN32 + create_app_running_mutex(); +#endif /* _WIN32 */ + + /* + * Get credential information for later use, and drop privileges + * before doing anything else. + * Let the user know if anything happened. + */ + init_process_policies(); + relinquish_special_privs_perm(); + print_current_user(); + + /* + * 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, + "tfshark: Can't get pathname of directory containing the tfshark program: %s.\n", + configuration_init_error); + g_free(configuration_init_error); + } + + initialize_funnel_ops(); + + /* Initialize the version information. */ + ws_init_version_info("TFShark", + epan_gather_compile_info, + epan_gather_runtime_info); + /* + * In order to have the -X opts assigned before the wslua machine starts + * we need to call getopts before epan_init() gets called. + * + * In order to handle, for example, -o options, we also need to call it + * *after* epan_init() gets called, so that the dissectors have had a + * chance to register their preferences. + * + * XXX - can we do this all with one getopt_long() call, saving the + * arguments we can't handle until after initializing libwireshark, + * and then process them after initializing libwireshark? + */ + ws_opterr = 0; + + while ((opt = ws_getopt_long(argc, argv, optstring, long_options, NULL)) != -1) { + switch (opt) { + case 'C': /* Configuration Profile */ + if (profile_exists (ws_optarg, FALSE)) { + set_profile_name (ws_optarg); + } else if (profile_exists (ws_optarg, TRUE)) { + char *pf_dir_path, *pf_dir_path2, *pf_filename; + /* Copy from global profile */ + if (create_persconffile_profile(ws_optarg, &pf_dir_path) == -1) { + cmdarg_err("Can't create directory\n\"%s\":\n%s.", + pf_dir_path, g_strerror(errno)); + + g_free(pf_dir_path); + exit_status = WS_EXIT_INVALID_FILE; + goto clean_exit; + } + if (copy_persconffile_profile(ws_optarg, ws_optarg, TRUE, &pf_filename, + &pf_dir_path, &pf_dir_path2) == -1) { + cmdarg_err("Can't copy file \"%s\" in directory\n\"%s\" to\n\"%s\":\n%s.", + pf_filename, pf_dir_path2, pf_dir_path, g_strerror(errno)); + + g_free(pf_filename); + g_free(pf_dir_path); + g_free(pf_dir_path2); + exit_status = WS_EXIT_INVALID_FILE; + goto clean_exit; + } + set_profile_name (ws_optarg); + } else { + cmdarg_err("Configuration Profile \"%s\" does not exist", ws_optarg); + return 1; + } + break; + case 'O': /* Only output these protocols */ + output_only = g_strdup(ws_optarg); + /* FALLTHROUGH */ + case 'V': /* Verbose */ + print_details = TRUE; + print_packet_info = TRUE; + break; + case 'x': /* Print packet data in hex (and ASCII) */ + print_hex = TRUE; + /* The user asked for hex output, so let's ensure they get it, + * even if they're writing to a file. + */ + print_packet_info = TRUE; + break; + case 'X': + ex_opt_add(ws_optarg); + break; + default: + break; + } + } + + /* + * Print packet summary information is the default, unless either -V or -x + * were specified. Note that this is new behavior, which + * allows for the possibility of printing only hex/ascii output without + * necessarily requiring that either the summary or details be printed too. + */ + if (print_summary == -1) + print_summary = (print_details || print_hex) ? FALSE : TRUE; + + init_report_message("tfshark", &tfshark_report_routines); + + timestamp_set_type(TS_RELATIVE); + timestamp_set_precision(TS_PREC_AUTO); + timestamp_set_seconds_type(TS_SECONDS_DEFAULT); + + /* + * Libwiretap must be initialized before libwireshark is, so that + * dissection-time handlers for file-type-dependent blocks can + * register using the file type/subtype value for the file type. + * + * XXX - TFShark shouldn't use libwiretap, as it's a file dissector + * and should read all files as raw bytes and then try to dissect them. + * It needs to handle file types its own way, because we would want + * to support dissecting file-type-specific blocks when dissecting + * capture files, but that mechanism should support plugins for + * other files, too, if *their* formats are extensible. + */ + wtap_init(TRUE); + + /* Register all dissectors; we must do this before checking for the + "-G" flag, as the "-G" flag dumps information registered by the + dissectors, and we must do it before we read the preferences, in + case any dissectors register preferences. */ + if (!epan_init(NULL, NULL, TRUE)) { + exit_status = WS_EXIT_INIT_FAILED; + goto clean_exit; + } + + /* Register all tap listeners; we do this before we parse the arguments, + as the "-z" argument can specify a registered tap. */ + + /* we register the plugin taps before the other taps because + stats_tree taps plugins will be registered as tap listeners + by stats_tree_stat.c and need to registered before that */ + + /* XXX Disable tap registration for now until we can get tfshark set up with + * its own set of taps and the necessary registration function etc. + register_all_tap_listeners(); + */ + + /* If invoked with the "-G" flag, we dump out information based on + the argument to the "-G" flag; if no argument is specified, + for backwards compatibility we dump out a glossary of display + filter symbols. + + XXX - we do this here, for now, to support "-G" with no arguments. + If none of our build or other processes uses "-G" with no arguments, + we can just process it with the other arguments. */ + if (argc >= 2 && strcmp(argv[1], "-G") == 0) { + proto_initialize_all_prefixes(); + + if (argc == 2) + proto_registrar_dump_fields(); + else { + if (strcmp(argv[2], "column-formats") == 0) + column_dump_column_formats(); + else if (strcmp(argv[2], "currentprefs") == 0) { + epan_load_settings(); + write_prefs(NULL); + } + else if (strcmp(argv[2], "decodes") == 0) + dissector_dump_decodes(); + else if (strcmp(argv[2], "defaultprefs") == 0) + write_prefs(NULL); + else if (strcmp(argv[2], "dissector-tables") == 0) + dissector_dump_dissector_tables(); + else if (strcmp(argv[2], "fields") == 0) + proto_registrar_dump_fields(); + else if (strcmp(argv[2], "ftypes") == 0) + proto_registrar_dump_ftypes(); + else if (strcmp(argv[2], "heuristic-decodes") == 0) + dissector_dump_heur_decodes(); + else if (strcmp(argv[2], "plugins") == 0) { +#ifdef HAVE_PLUGINS + plugins_dump_all(); +#endif +#ifdef HAVE_LUA + wslua_plugins_dump_all(); +#endif + } + else if (strcmp(argv[2], "protocols") == 0) + proto_registrar_dump_protocols(); + else if (strcmp(argv[2], "values") == 0) + proto_registrar_dump_values(); + else if (strcmp(argv[2], "?") == 0) + glossary_option_help(); + else if (strcmp(argv[2], "-?") == 0) + glossary_option_help(); + else { + cmdarg_err("Invalid \"%s\" option for -G flag, enter -G ? for more help.", argv[2]); + exit_status = WS_EXIT_INVALID_OPTION; + goto clean_exit; + } + } + goto clean_exit; + } + + /* Load libwireshark settings from the current profile. */ + prefs_p = epan_load_settings(); + prefs_loaded = TRUE; + + cap_file_init(&cfile); + + /* Print format defaults to this. */ + print_format = PR_FMT_TEXT; + + output_fields = output_fields_new(); + + /* + * To reset the options parser, set ws_optreset to 1 and set ws_optind to 1. + * + * Also reset ws_opterr to 1, so that error messages are printed by + * getopt_long(). + */ + ws_optreset = 1; + ws_optind = 1; + ws_opterr = 1; + + /* Now get our args */ + while ((opt = ws_getopt_long(argc, argv, optstring, long_options, NULL)) != -1) { + switch (opt) { + case '2': /* Perform two-pass analysis */ + perform_two_pass_analysis = TRUE; + break; + case 'C': + /* already processed; just ignore it now */ + break; + case 'e': + /* Field entry */ + output_fields_add(output_fields, ws_optarg); + break; + case 'E': + /* Field option */ + if (!output_fields_set_option(output_fields, ws_optarg)) { + cmdarg_err("\"%s\" is not a valid field output option=value pair.", ws_optarg); + output_fields_list_options(stderr); + exit_status = WS_EXIT_INVALID_OPTION; + goto clean_exit; + } + break; + + case 'h': /* Print help and exit */ + show_help_header("Analyze file structure."); + print_usage(stdout); + goto clean_exit; + break; + case 'l': /* "Line-buffer" standard output */ + /* The ANSI C standard does not appear to *require* that a + line-buffered stream be flushed to the host environment + whenever a newline is written, it just says that, on such a + stream, characters "are intended to be transmitted to or + from the host environment as a block when a new-line + character is encountered". + + The Visual C++ 6.0 C implementation doesn't do what is + intended; even if you set a stream to be line-buffered, it + still doesn't flush the buffer at the end of every line. + + The whole reason for the "-l" flag in either tcpdump or + TShark is to allow the output of a live capture to be piped + to a program or script and to have that script see the + information for the packet as soon as it's printed, rather + than having to wait until a standard I/O buffer fills up. + + So, if the "-l" flag is specified, we flush the standard + output at the end of a packet. This will do the right thing + if we're printing packet summary lines, and, as we print the + entire protocol tree for a single packet without waiting for + anything to happen, it should be as good as line-buffered + mode if we're printing protocol trees - arguably even + better, as it may do fewer writes. */ + line_buffered = TRUE; + break; + case 'o': /* Override preference from command line */ + { + char *errmsg = NULL; + + switch (prefs_set_pref(ws_optarg, &errmsg)) { + + case PREFS_SET_OK: + break; + + case PREFS_SET_SYNTAX_ERR: + cmdarg_err("Invalid -o flag \"%s\"%s%s", ws_optarg, + errmsg ? ": " : "", errmsg ? errmsg : ""); + g_free(errmsg); + exit_status = WS_EXIT_INVALID_OPTION; + goto clean_exit; + break; + + case PREFS_SET_NO_SUCH_PREF: + cmdarg_err("-o flag \"%s\" specifies unknown preference", ws_optarg); + exit_status = WS_EXIT_INVALID_OPTION; + goto clean_exit; + break; + + case PREFS_SET_OBSOLETE: + cmdarg_err("-o flag \"%s\" specifies obsolete preference", ws_optarg); + exit_status = WS_EXIT_INVALID_OPTION; + goto clean_exit; + break; + } + break; + } + case 'q': /* Quiet */ + quiet = TRUE; + break; + case 'Q': /* Really quiet */ + quiet = TRUE; + really_quiet = TRUE; + break; + case 'r': /* Read capture file x */ + cf_name = g_strdup(ws_optarg); + break; + case 'R': /* Read file filter */ + rfilter = ws_optarg; + break; + case 'S': /* Set the line Separator to be printed between packets */ + separator = g_strdup(ws_optarg); + break; + case 'T': /* printing Type */ + if (strcmp(ws_optarg, "text") == 0) { + output_action = WRITE_TEXT; + print_format = PR_FMT_TEXT; + } else if (strcmp(ws_optarg, "ps") == 0) { + output_action = WRITE_TEXT; + print_format = PR_FMT_PS; + } else if (strcmp(ws_optarg, "pdml") == 0) { + output_action = WRITE_XML; + print_details = TRUE; /* Need details */ + print_summary = FALSE; /* Don't allow summary */ + } else if (strcmp(ws_optarg, "psml") == 0) { + output_action = WRITE_XML; + print_details = FALSE; /* Don't allow details */ + print_summary = TRUE; /* Need summary */ + } else if (strcmp(ws_optarg, "fields") == 0) { + output_action = WRITE_FIELDS; + print_details = TRUE; /* Need full tree info */ + print_summary = FALSE; /* Don't allow summary */ + } else { + cmdarg_err("Invalid -T parameter \"%s\"; it must be one of:", ws_optarg); /* x */ + cmdarg_err_cont("\t\"fields\" The values of fields specified with the -e option, in a form\n" + "\t specified by the -E option.\n" + "\t\"pdml\" Packet Details Markup Language, an XML-based format for the\n" + "\t details of a decoded packet. This information is equivalent to\n" + "\t the packet details printed with the -V flag.\n" + "\t\"ps\" PostScript for a human-readable one-line summary of each of\n" + "\t the packets, or a multi-line view of the details of each of\n" + "\t the packets, depending on whether the -V flag was specified.\n" + "\t\"psml\" Packet Summary Markup Language, an XML-based format for the\n" + "\t summary information of a decoded packet. This information is\n" + "\t equivalent to the information shown in the one-line summary\n" + "\t printed by default.\n" + "\t\"text\" Text of a human-readable one-line summary of each of the\n" + "\t packets, or a multi-line view of the details of each of the\n" + "\t packets, depending on whether the -V flag was specified.\n" + "\t This is the default."); + exit_status = WS_EXIT_INVALID_OPTION; + goto clean_exit; + } + break; + case 'v': /* Show version and exit */ + show_version(); + goto clean_exit; + case 'O': /* Only output these protocols */ + /* already processed; just ignore it now */ + break; + case 'V': /* Verbose */ + /* already processed; just ignore it now */ + break; + case 'x': /* Print packet data in hex (and ASCII) */ + /* already processed; just ignore it now */ + break; + case 'X': + /* already processed; just ignore it now */ + break; + case 'Y': + dfilter = ws_optarg; + break; + case 'z': + /* We won't call the init function for the stat this soon + as it would disallow MATE's fields (which are registered + by the preferences set callback) from being used as + part of a tap filter. Instead, we just add the argument + to a list of stat arguments. */ + if (strcmp("help", ws_optarg) == 0) { + fprintf(stderr, "tfshark: The available statistics for the \"-z\" option are:\n"); + list_stat_cmd_args(); + goto clean_exit; + } + if (!process_stat_cmd_arg(ws_optarg)) { + cmdarg_err("Invalid -z argument \"%s\"; it must be one of:", ws_optarg); + list_stat_cmd_args(); + exit_status = WS_EXIT_INVALID_OPTION; + goto clean_exit; + } + break; + case 'd': /* Decode as rule */ + case 'K': /* Kerberos keytab file */ + case 't': /* Time stamp type */ + case 'u': /* Seconds type */ + case LONGOPT_DISABLE_PROTOCOL: /* disable dissection of protocol */ + case LONGOPT_ENABLE_HEURISTIC: /* enable heuristic dissection of protocol */ + case LONGOPT_DISABLE_HEURISTIC: /* disable heuristic dissection of protocol */ + case LONGOPT_ENABLE_PROTOCOL: /* enable dissection of protocol (that is disabled by default) */ + if (!dissect_opts_handle_opt(opt, ws_optarg)) { + exit_status = WS_EXIT_INVALID_OPTION; + goto clean_exit; + } + break; + default: + case '?': /* Bad flag - print usage message */ + print_usage(stderr); + exit_status = WS_EXIT_INVALID_OPTION; + goto clean_exit; + break; + } + } + + /* If we specified output fields, but not the output field type... */ + if (WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) { + cmdarg_err("Output fields were specified with \"-e\", " + "but \"-Tfields\" was not specified."); + return 1; + } else if (WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) { + cmdarg_err("\"-Tfields\" was specified, but no fields were " + "specified with \"-e\"."); + + exit_status = WS_EXIT_INVALID_OPTION; + goto clean_exit; + } + + /* We require a -r flag specifying a file to read. */ + if (cf_name == NULL) { + cmdarg_err("A file to read must be specified with \"-r\"."); + exit_status = NO_FILE_SPECIFIED; + goto clean_exit; + } + + /* If no display filter has been specified, and there are still command- + line arguments, treat them as the tokens of a display filter. */ + if (ws_optind < argc) { + if (dfilter != NULL) { + cmdarg_err("Display filters were specified both with \"-Y\" " + "and with additional command-line arguments."); + exit_status = WS_EXIT_INVALID_OPTION; + goto clean_exit; + } + dfilter = get_args_as_string(argc, argv, ws_optind); + } + + /* if "-q" wasn't specified, we should print packet information */ + if (!quiet) + print_packet_info = TRUE; + + if (arg_error) { + print_usage(stderr); + exit_status = WS_EXIT_INVALID_OPTION; + goto clean_exit; + } + + if (print_hex) { + if (output_action != WRITE_TEXT) { + cmdarg_err("Raw packet hex data can only be printed as text or PostScript"); + exit_status = WS_EXIT_INVALID_OPTION; + goto clean_exit; + } + } + + if (output_only != NULL) { + char *ps; + + if (!print_details) { + cmdarg_err("-O requires -V"); + exit_status = WS_EXIT_INVALID_OPTION; + goto clean_exit; + } + + output_only_tables = g_hash_table_new (g_str_hash, g_str_equal); + for (ps = strtok (output_only, ","); ps; ps = strtok (NULL, ",")) { + g_hash_table_insert(output_only_tables, (gpointer)ps, (gpointer)ps); + } + } + + if (rfilter != NULL && !perform_two_pass_analysis) { + cmdarg_err("-R without -2 is deprecated. For single-pass filtering use -Y."); + exit_status = WS_EXIT_INVALID_OPTION; + goto clean_exit; + } + + /* Notify all registered modules that have had any of their preferences + changed either from one of the preferences file or from the command + line that their preferences have changed. */ + prefs_apply_all(); + + /* + * Enabled and disabled protocols and heuristic dissectors as per + * command-line options. + */ + if (!setup_enabled_and_disabled_protocols()) { + exit_status = WS_EXIT_INVALID_OPTION; + goto clean_exit; + } + + /* Build the column format array */ + build_column_format_array(&cfile.cinfo, prefs_p->num_cols, TRUE); + + if (rfilter != NULL) { + if (!dfilter_compile(rfilter, &rfcode, &df_err)) { + cmdarg_err("%s", df_err->msg); + df_error_free(&df_err); + exit_status = WS_EXIT_INVALID_FILTER; + goto clean_exit; + } + } + cfile.rfcode = rfcode; + + if (dfilter != NULL) { + if (!dfilter_compile(dfilter, &dfcode, &df_err)) { + cmdarg_err("%s", df_err->msg); + df_error_free(&df_err); + exit_status = WS_EXIT_INVALID_FILTER; + goto clean_exit; + } + } + cfile.dfcode = dfcode; + + if (print_packet_info) { + /* If we're printing as text or PostScript, we have + to create a print stream. */ + if (output_action == WRITE_TEXT) { + switch (print_format) { + + case PR_FMT_TEXT: + print_stream = print_stream_text_stdio_new(stdout); + break; + + case PR_FMT_PS: + print_stream = print_stream_ps_stdio_new(stdout); + break; + + default: + ws_assert_not_reached(); + } + } + } + + /* We have to dissect each packet if: + + we're printing information about each packet; + + we're using a read filter on the packets; + + we're using a display filter on the packets; + + we're using any taps that need dissection. */ + do_dissection = print_packet_info || rfcode || dfcode || tap_listeners_require_dissection(); + + /* + * Read the file. + */ + + /* TODO: if tfshark is ever changed to give the user a choice of which + open_routine reader to use, then the following needs to change. */ + if (cf_open(&cfile, cf_name, WTAP_TYPE_AUTO, FALSE, &err) != CF_OK) { + exit_status = WS_EXIT_OPEN_ERROR; + goto clean_exit; + } + + /* Start statistics taps; we do so after successfully opening the + capture file, so we know we have something to compute stats + on, and after registering all dissectors, so that MATE will + have registered its field array so we can have a tap filter + with one of MATE's late-registered fields as part of the + filter. */ + start_requested_stats(); + + /* Process the packets in the file */ + TRY { + /* XXX - for now there is only 1 packet */ + success = process_file(&cfile, 1, 0); + } + CATCH(OutOfMemoryError) { + fprintf(stderr, + "Out Of Memory.\n" + "\n" + "Sorry, but TFShark has to terminate now.\n" + "\n" + "Some infos / workarounds can be found at:\n" + WS_WIKI_URL("KnownBugs/OutOfMemory") "\n"); + success = FALSE; + } + ENDTRY; + + if (!success) { + /* We still dump out the results of taps, etc., as we might have + read some packets; however, we exit with an error status. */ + exit_status = 2; + } + + g_free(cf_name); + + if (cfile.provider.frames != NULL) { + free_frame_data_sequence(cfile.provider.frames); + cfile.provider.frames = NULL; + } + + draw_tap_listeners(TRUE); + funnel_dump_all_text_windows(); + +clean_exit: + destroy_print_stream(print_stream); + epan_free(cfile.epan); + epan_cleanup(); + + output_fields_free(output_fields); + output_fields = NULL; + + col_cleanup(&cfile.cinfo); + wtap_cleanup(); + return exit_status; +} + +static const nstime_t * +tfshark_get_frame_ts(struct packet_provider_data *prov, guint32 frame_num) +{ + const frame_data *fd = NULL; + if (prov->ref && prov->ref->num == frame_num) { + fd = prov->ref; + } else if (prov->prev_dis && prov->prev_dis->num == frame_num) { + fd = prov->prev_dis; + } else if (prov->prev_cap && prov->prev_cap->num == frame_num) { + fd = prov->prev_cap; + } else if (prov->frames) { + fd = frame_data_sequence_find(prov->frames, frame_num); + } + + return (fd && fd->has_ts) ? &fd->abs_ts : NULL; +} + +static const char * +no_interface_name(struct packet_provider_data *prov _U_, guint32 interface_id _U_) +{ + return ""; +} + +static epan_t * +tfshark_epan_new(capture_file *cf) +{ + static const struct packet_provider_funcs funcs = { + tfshark_get_frame_ts, + no_interface_name, + NULL, + NULL, + }; + + return epan_new(&cf->provider, &funcs); +} + +static gboolean +process_packet_first_pass(capture_file *cf, epan_dissect_t *edt, + gint64 offset, wtap_rec *rec, + const guchar *pd) +{ + frame_data fdlocal; + guint32 framenum; + gboolean passed; + + /* The frame number of this packet is one more than the count of + frames in this packet. */ + framenum = cf->count + 1; + + /* If we're not running a display filter and we're not printing any + packet information, we don't need to do a dissection. This means + that all packets can be marked as 'passed'. */ + passed = TRUE; + + frame_data_init(&fdlocal, framenum, rec, offset, cum_bytes); + + /* If we're going to print packet information, or we're going to + run a read filter, or display filter, or we're going to process taps, set up to + do a dissection and do so. */ + if (edt) { + /* If we're running a read filter, prime the epan_dissect_t with that + filter. */ + if (cf->rfcode) + epan_dissect_prime_with_dfilter(edt, cf->rfcode); + + /* This is the first pass, so prime the epan_dissect_t with the + hfids postdissectors want on the first pass. */ + prime_epan_dissect_with_postdissector_wanted_hfids(edt); + + frame_data_set_before_dissect(&fdlocal, &cf->elapsed_time, + &cf->provider.ref, cf->provider.prev_dis); + if (cf->provider.ref == &fdlocal) { + ref_frame = fdlocal; + cf->provider.ref = &ref_frame; + } + + epan_dissect_file_run(edt, rec, + file_tvbuff_new(&cf->provider, &fdlocal, pd), + &fdlocal, NULL); + + /* Run the read filter if we have one. */ + if (cf->rfcode) + passed = dfilter_apply_edt(cf->rfcode, edt); + } + + if (passed) { + frame_data_set_after_dissect(&fdlocal, &cum_bytes); + cf->provider.prev_cap = cf->provider.prev_dis = frame_data_sequence_add(cf->provider.frames, &fdlocal); + + /* If we're not doing dissection then there won't be any dependent frames. + * More importantly, edt.pi.fd.dependent_frames won't be initialized because + * epan hasn't been initialized. + */ + if (edt && edt->pi.fd->dependent_frames) { + g_hash_table_foreach(edt->pi.fd->dependent_frames, find_and_mark_frame_depended_upon, cf->provider.frames); + } + + cf->count++; + } else { + /* if we don't add it to the frame_data_sequence, clean it up right now + * to avoid leaks */ + frame_data_destroy(&fdlocal); + } + + if (edt) + epan_dissect_reset(edt); + + return passed; +} + +static gboolean +process_packet_second_pass(capture_file *cf, epan_dissect_t *edt, + frame_data *fdata, wtap_rec *rec, + Buffer *buf) +{ + column_info *cinfo; + gboolean passed; + + /* If we're not running a display filter and we're not printing any + packet information, we don't need to do a dissection. This means + that all packets can be marked as 'passed'. */ + passed = TRUE; + + /* If we're going to print packet information, or we're going to + run a read filter, or we're going to process taps, set up to + do a dissection and do so. */ + if (edt) { + + /* If we're running a display filter, prime the epan_dissect_t with that + filter. */ + if (cf->dfcode) + epan_dissect_prime_with_dfilter(edt, cf->dfcode); + + /* This is the first and only pass, so prime the epan_dissect_t + with the hfids postdissectors want on the first pass. */ + prime_epan_dissect_with_postdissector_wanted_hfids(edt); + + col_custom_prime_edt(edt, &cf->cinfo); + + /* We only need the columns if either + 1) some tap needs the columns + or + 2) we're printing packet info but we're *not* verbose; in verbose + mode, we print the protocol tree, not the protocol summary. + */ + if ((tap_listeners_require_columns()) || (print_packet_info && print_summary)) + cinfo = &cf->cinfo; + else + cinfo = NULL; + + frame_data_set_before_dissect(fdata, &cf->elapsed_time, + &cf->provider.ref, cf->provider.prev_dis); + if (cf->provider.ref == fdata) { + ref_frame = *fdata; + cf->provider.ref = &ref_frame; + } + + epan_dissect_file_run_with_taps(edt, rec, + file_tvbuff_new_buffer(&cf->provider, fdata, buf), fdata, cinfo); + + /* Run the read/display filter if we have one. */ + if (cf->dfcode) + passed = dfilter_apply_edt(cf->dfcode, edt); + } + + if (passed) { + frame_data_set_after_dissect(fdata, &cum_bytes); + /* Process this packet. */ + if (print_packet_info) { + /* We're printing packet information; print the information for + this packet. */ + print_packet(cf, edt); + + /* If we're doing "line-buffering", flush the standard output + after every packet. See the comment above, for the "-l" + option, for an explanation of why we do that. */ + if (line_buffered) + fflush(stdout); + + if (ferror(stdout)) { + show_print_file_io_error(errno); + return FALSE; + } + } + cf->provider.prev_dis = fdata; + } + cf->provider.prev_cap = fdata; + + if (edt) { + epan_dissect_reset(edt); + } + return passed || fdata->dependent_of_displayed; +} + +static gboolean +local_wtap_read(capture_file *cf, wtap_rec *file_rec _U_, int *err, gchar **err_info _U_, gint64 *data_offset _U_, guint8** data_buffer) +{ + /* int bytes_read; */ + gint64 packet_size = wtap_file_size(cf->provider.wth, err); + + *data_buffer = (guint8*)g_malloc((gsize)packet_size); + /* bytes_read =*/ file_read(*data_buffer, (unsigned int)packet_size, cf->provider.wth->fh); + +#if 0 /* no more filetap */ + if (bytes_read < 0) { + *err = file_error(cf->provider.wth->fh, err_info); + if (*err == 0) + *err = FTAP_ERR_SHORT_READ; + return FALSE; + } else if (bytes_read == 0) { + /* Done with file, no error */ + return FALSE; + } + + + /* XXX - SET FRAME SIZE EQUAL TO TOTAL FILE SIZE */ + file_rec->rec_header.packet_header.caplen = (guint32)packet_size; + file_rec->rec_header.packet_header.len = (guint32)packet_size; + + /* + * Set the packet encapsulation to the file's encapsulation + * value; if that's not WTAP_ENCAP_PER_PACKET, it's the + * right answer (and means that the read routine for this + * capture file type doesn't have to set it), and if it + * *is* WTAP_ENCAP_PER_PACKET, the caller needs to set it + * anyway. + */ + wth->rec.rec_header.packet_header.pkt_encap = wth->file_encap; + + if (!wth->subtype_read(wth, err, err_info, data_offset)) { + /* + * If we didn't get an error indication, we read + * the last packet. See if there's any deferred + * error, as might, for example, occur if we're + * reading a compressed file, and we got an error + * reading compressed data from the file, but + * got enough compressed data to decompress the + * last packet of the file. + */ + if (*err == 0) + *err = file_error(wth->fh, err_info); + return FALSE; /* failure */ + } + + /* + * It makes no sense for the captured data length to be bigger + * than the actual data length. + */ + if (wth->rec.rec_header.packet_header.caplen > wth->rec.rec_header.packet_header.len) + wth->rec.rec_header.packet_header.caplen = wth->rec.rec_header.packet_header.len; + + /* + * Make sure that it's not WTAP_ENCAP_PER_PACKET, as that + * probably means the file has that encapsulation type + * but the read routine didn't set this packet's + * encapsulation type. + */ + ws_assert(wth->rec.rec_header.packet_header.pkt_encap != WTAP_ENCAP_PER_PACKET); +#endif + + return TRUE; /* success */ +} + +static gboolean +process_file(capture_file *cf, int max_packet_count, gint64 max_byte_count) +{ + guint32 framenum; + int err; + gchar *err_info = NULL; + gint64 data_offset = 0; + gboolean filtering_tap_listeners; + guint tap_flags; + Buffer buf; + epan_dissect_t *edt = NULL; + wtap_rec file_rec; + guint8* raw_data; + + if (print_packet_info) { + if (!write_preamble(cf)) { + err = errno; + show_print_file_io_error(err); + goto out; + } + } + + /* Do we have any tap listeners with filters? */ + filtering_tap_listeners = have_filtering_tap_listeners(); + + /* Get the union of the flags for all tap listeners. */ + tap_flags = union_of_tap_listener_flags(); + + wtap_rec_init(&file_rec); + + /* XXX - TEMPORARY HACK TO ELF DISSECTOR */ + file_rec.rec_header.packet_header.pkt_encap = 1234; + + if (perform_two_pass_analysis) { + frame_data *fdata; + + /* Allocate a frame_data_sequence for all the frames. */ + cf->provider.frames = new_frame_data_sequence(); + + if (do_dissection) { + gboolean create_proto_tree; + + /* + * Determine whether we need to create a protocol tree. + * We do if: + * + * we're going to apply a read filter; + * + * a postdissector wants field values or protocols + * on the first pass. + */ + create_proto_tree = + (cf->rfcode != NULL || postdissectors_want_hfids()); + + /* We're not going to display the protocol tree on this pass, + so it's not going to be "visible". */ + edt = epan_dissect_new(cf->epan, create_proto_tree, FALSE); + } + while (local_wtap_read(cf, &file_rec, &err, &err_info, &data_offset, &raw_data)) { + if (process_packet_first_pass(cf, edt, data_offset, &file_rec, raw_data)) { + + /* Stop reading if we have the maximum number of packets; + * When the -c option has not been used, max_packet_count + * starts at 0, which practically means, never stop reading. + * (unless we roll over max_packet_count ?) + */ + if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) { + err = 0; /* This is not an error */ + break; + } + } + } + + if (edt) { + epan_dissect_free(edt); + edt = NULL; + } + +#if 0 + /* Close the sequential I/O side, to free up memory it requires. */ + wtap_sequential_close(cf->provider.wth); +#endif + + /* Allow the protocol dissectors to free up memory that they + * don't need after the sequential run-through of the packets. */ + postseq_cleanup_all_protocols(); + + cf->provider.prev_dis = NULL; + cf->provider.prev_cap = NULL; + ws_buffer_init(&buf, 1514); + + if (do_dissection) { + gboolean create_proto_tree; + + /* + * Determine whether we need to create a protocol tree. + * We do if: + * + * we're going to apply a display filter; + * + * we're going to print the protocol tree; + * + * one of the tap listeners requires a protocol tree; + * + * we have custom columns (which require field values, which + * currently requires that we build a protocol tree). + */ + create_proto_tree = + (cf->dfcode || print_details || filtering_tap_listeners || + (tap_flags & TL_REQUIRES_PROTO_TREE) || have_custom_cols(&cf->cinfo)); + + /* The protocol tree will be "visible", i.e., printed, only if we're + printing packet details, which is true if we're printing stuff + ("print_packet_info" is true) and we're in verbose mode + ("packet_details" is true). */ + edt = epan_dissect_new(cf->epan, create_proto_tree, print_packet_info && print_details); + } + + for (framenum = 1; err == 0 && framenum <= cf->count; framenum++) { + fdata = frame_data_sequence_find(cf->provider.frames, framenum); +#if 0 + if (wtap_seek_read(cf->provider.wth, fdata->file_off, + &buf, fdata->cap_len, &err, &err_info)) { + process_packet_second_pass(cf, edt, fdata, &cf->rec, &buf, tap_flags); + } +#else + if (!process_packet_second_pass(cf, edt, fdata, &cf->rec, &buf)) + return FALSE; +#endif + } + + if (edt) { + epan_dissect_free(edt); + edt = NULL; + } + + ws_buffer_free(&buf); + } + else { + framenum = 0; + + if (do_dissection) { + gboolean create_proto_tree; + + /* + * Determine whether we need to create a protocol tree. + * We do if: + * + * we're going to apply a read filter; + * + * we're going to apply a display filter; + * + * we're going to print the protocol tree; + * + * one of the tap listeners is going to apply a filter; + * + * one of the tap listeners requires a protocol tree; + * + * a postdissector wants field values or protocols + * on the first pass; + * + * we have custom columns (which require field values, which + * currently requires that we build a protocol tree). + */ + create_proto_tree = + (cf->rfcode || cf->dfcode || print_details || filtering_tap_listeners || + (tap_flags & TL_REQUIRES_PROTO_TREE) || postdissectors_want_hfids() || + have_custom_cols(&cf->cinfo)); + + /* The protocol tree will be "visible", i.e., printed, only if we're + printing packet details, which is true if we're printing stuff + ("print_packet_info" is true) and we're in verbose mode + ("packet_details" is true). */ + edt = epan_dissect_new(cf->epan, create_proto_tree, print_packet_info && print_details); + } + + while (local_wtap_read(cf, &file_rec, &err, &err_info, &data_offset, &raw_data)) { + + framenum++; + + if (!process_packet_single_pass(cf, edt, data_offset, + &file_rec/*wtap_get_rec(cf->provider.wth)*/, + raw_data)) + return FALSE; + + /* Stop reading if we have the maximum number of packets; + * When the -c option has not been used, max_packet_count + * starts at 0, which practically means, never stop reading. + * (unless we roll over max_packet_count ?) + */ + if ( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) { + err = 0; /* This is not an error */ + break; + } + } + + if (edt) { + epan_dissect_free(edt); + edt = NULL; + } + } + + wtap_rec_cleanup(&file_rec); + + if (err != 0) { + /* + * Print a message noting that the read failed somewhere along the line. + * + * If we're printing packet data, and the standard output and error are + * going to the same place, flush the standard output, so everything + * buffered up is written, and then print a newline to the standard error + * before printing the error message, to separate it from the packet + * data. (Alas, that only works on UN*X; st_dev is meaningless, and + * the _fstat() documentation at Microsoft doesn't indicate whether + * st_ino is even supported.) + */ +#ifndef _WIN32 + if (print_packet_info) { + ws_statb64 stat_stdout, stat_stderr; + + if (ws_fstat64(1, &stat_stdout) == 0 && ws_fstat64(2, &stat_stderr) == 0) { + if (stat_stdout.st_dev == stat_stderr.st_dev && + stat_stdout.st_ino == stat_stderr.st_ino) { + fflush(stdout); + fprintf(stderr, "\n"); + } + } + } +#endif +#if 0 + switch (err) { + + case FTAP_ERR_UNSUPPORTED: + cmdarg_err("The file \"%s\" contains record data that TFShark doesn't support.\n(%s)", + cf->filename, err_info); + g_free(err_info); + break; + + case FTAP_ERR_UNSUPPORTED_ENCAP: + cmdarg_err("The file \"%s\" has a packet with a network type that TFShark doesn't support.\n(%s)", + cf->filename, err_info); + g_free(err_info); + break; + + case FTAP_ERR_CANT_READ: + cmdarg_err("An attempt to read from the file \"%s\" failed for some unknown reason.", + cf->filename); + break; + + case FTAP_ERR_SHORT_READ: + cmdarg_err("The file \"%s\" appears to have been cut short in the middle of a packet.", + cf->filename); + break; + + case FTAP_ERR_BAD_FILE: + cmdarg_err("The file \"%s\" appears to be damaged or corrupt.\n(%s)", + cf->filename, err_info); + g_free(err_info); + break; + + case FTAP_ERR_DECOMPRESS: + cmdarg_err("The compressed file \"%s\" appears to be damaged or corrupt.\n" + "(%s)", cf->filename, err_info); + break; + + default: + cmdarg_err("An error occurred while reading the file \"%s\": %s.", + cf->filename, ftap_strerror(err)); + break; + } +#endif + } else { + if (print_packet_info) { + if (!write_finale()) { + err = errno; + show_print_file_io_error(err); + } + } + } + +out: + wtap_close(cf->provider.wth); + cf->provider.wth = NULL; + + return (err != 0); +} + +static gboolean +process_packet_single_pass(capture_file *cf, epan_dissect_t *edt, gint64 offset, + wtap_rec *rec, const guchar *pd) +{ + frame_data fdata; + column_info *cinfo; + gboolean passed; + + /* Count this packet. */ + cf->count++; + + /* If we're not running a display filter and we're not printing any + packet information, we don't need to do a dissection. This means + that all packets can be marked as 'passed'. */ + passed = TRUE; + + frame_data_init(&fdata, cf->count, rec, offset, cum_bytes); + + /* If we're going to print packet information, or we're going to + run a read filter, or we're going to process taps, set up to + do a dissection and do so. */ + if (edt) { + /* If we're running a filter, prime the epan_dissect_t with that + filter. */ + if (cf->dfcode) + epan_dissect_prime_with_dfilter(edt, cf->dfcode); + + col_custom_prime_edt(edt, &cf->cinfo); + + /* We only need the columns if either + 1) some tap needs the columns + or + 2) we're printing packet info but we're *not* verbose; in verbose + mode, we print the protocol tree, not the protocol summary. + or + 3) there is a column mapped as an individual field */ + if ((tap_listeners_require_columns()) || (print_packet_info && print_summary) || output_fields_has_cols(output_fields)) + cinfo = &cf->cinfo; + else + cinfo = NULL; + + frame_data_set_before_dissect(&fdata, &cf->elapsed_time, + &cf->provider.ref, cf->provider.prev_dis); + if (cf->provider.ref == &fdata) { + ref_frame = fdata; + cf->provider.ref = &ref_frame; + } + + epan_dissect_file_run_with_taps(edt, rec, + frame_tvbuff_new(&cf->provider, &fdata, pd), + &fdata, cinfo); + + /* Run the filter if we have it. */ + if (cf->dfcode) + passed = dfilter_apply_edt(cf->dfcode, edt); + } + + if (passed) { + frame_data_set_after_dissect(&fdata, &cum_bytes); + + /* Process this packet. */ + if (print_packet_info) { + /* We're printing packet information; print the information for + this packet. */ + print_packet(cf, edt); + + /* If we're doing "line-buffering", flush the standard output + after every packet. See the comment above, for the "-l" + option, for an explanation of why we do that. */ + if (line_buffered) + fflush(stdout); + + if (ferror(stdout)) { + show_print_file_io_error(errno); + return FALSE; + } + } + + /* this must be set after print_packet() [bug #8160] */ + prev_dis_frame = fdata; + cf->provider.prev_dis = &prev_dis_frame; + } + + prev_cap_frame = fdata; + cf->provider.prev_cap = &prev_cap_frame; + + if (edt) { + epan_dissect_reset(edt); + frame_data_destroy(&fdata); + } + return passed; +} + +static gboolean +write_preamble(capture_file *cf) +{ + switch (output_action) { + + case WRITE_TEXT: + return print_preamble(print_stream, cf->filename, get_ws_vcs_version_info()); + + case WRITE_XML: + if (print_details) + write_pdml_preamble(stdout, cf->filename); + else + write_psml_preamble(&cf->cinfo, stdout); + return !ferror(stdout); + + case WRITE_FIELDS: + write_fields_preamble(output_fields, stdout); + return !ferror(stdout); + + default: + ws_assert_not_reached(); + return FALSE; + } +} + +static char * +get_line_buf(size_t len) +{ + static char *line_bufp = NULL; + static size_t line_buf_len = 256; + size_t new_line_buf_len; + + for (new_line_buf_len = line_buf_len; len > new_line_buf_len; + new_line_buf_len *= 2) + ; + if (line_bufp == NULL) { + line_buf_len = new_line_buf_len; + line_bufp = (char *)g_malloc(line_buf_len + 1); + } else { + if (new_line_buf_len > line_buf_len) { + line_buf_len = new_line_buf_len; + line_bufp = (char *)g_realloc(line_bufp, line_buf_len + 1); + } + } + return line_bufp; +} + +static inline void +put_string(char *dest, const char *str, size_t str_len) +{ + memcpy(dest, str, str_len); + dest[str_len] = '\0'; +} + +static inline void +put_spaces_string(char *dest, const char *str, size_t str_len, size_t str_with_spaces) +{ + size_t i; + + for (i = str_len; i < str_with_spaces; i++) + *dest++ = ' '; + + put_string(dest, str, str_len); +} + +static inline void +put_string_spaces(char *dest, const char *str, size_t str_len, size_t str_with_spaces) +{ + size_t i; + + memcpy(dest, str, str_len); + for (i = str_len; i < str_with_spaces; i++) + dest[i] = ' '; + + dest[str_with_spaces] = '\0'; +} + +static gboolean +print_columns(capture_file *cf) +{ + char *line_bufp; + int i; + size_t buf_offset; + size_t column_len; + size_t col_len; + col_item_t* col_item; + + line_bufp = get_line_buf(256); + buf_offset = 0; + *line_bufp = '\0'; + for (i = 0; i < cf->cinfo.num_cols; i++) { + col_item = &cf->cinfo.columns[i]; + /* Skip columns not marked as visible. */ + if (!get_column_visible(i)) + continue; + const gchar* col_text = get_column_text(&cf->cinfo, i); + switch (col_item->col_fmt) { + case COL_NUMBER: + column_len = col_len = strlen(col_text); + if (column_len < 3) + column_len = 3; + line_bufp = get_line_buf(buf_offset + column_len); + put_spaces_string(line_bufp + buf_offset, col_text, col_len, column_len); + break; + + case COL_CLS_TIME: + case COL_REL_TIME: + case COL_ABS_TIME: + case COL_ABS_YMD_TIME: /* XXX - wider */ + case COL_ABS_YDOY_TIME: /* XXX - wider */ + case COL_UTC_TIME: + case COL_UTC_YMD_TIME: /* XXX - wider */ + case COL_UTC_YDOY_TIME: /* XXX - wider */ + column_len = col_len = strlen(col_text); + if (column_len < 10) + column_len = 10; + line_bufp = get_line_buf(buf_offset + column_len); + put_spaces_string(line_bufp + buf_offset, col_text, col_len, column_len); + break; + + case COL_DEF_SRC: + case COL_RES_SRC: + case COL_UNRES_SRC: + case COL_DEF_DL_SRC: + case COL_RES_DL_SRC: + case COL_UNRES_DL_SRC: + case COL_DEF_NET_SRC: + case COL_RES_NET_SRC: + case COL_UNRES_NET_SRC: + column_len = col_len = strlen(col_text); + if (column_len < 12) + column_len = 12; + line_bufp = get_line_buf(buf_offset + column_len); + put_spaces_string(line_bufp + buf_offset, col_text, col_len, column_len); + break; + + case COL_DEF_DST: + case COL_RES_DST: + case COL_UNRES_DST: + case COL_DEF_DL_DST: + case COL_RES_DL_DST: + case COL_UNRES_DL_DST: + case COL_DEF_NET_DST: + case COL_RES_NET_DST: + case COL_UNRES_NET_DST: + column_len = col_len = strlen(col_text); + if (column_len < 12) + column_len = 12; + line_bufp = get_line_buf(buf_offset + column_len); + put_string_spaces(line_bufp + buf_offset, col_text, col_len, column_len); + break; + + default: + column_len = strlen(col_text); + line_bufp = get_line_buf(buf_offset + column_len); + put_string(line_bufp + buf_offset, col_text, column_len); + break; + } + buf_offset += column_len; + if (i != cf->cinfo.num_cols - 1) { + /* + * This isn't the last column, so we need to print a + * separator between this column and the next. + * + * If we printed a network source and are printing a + * network destination of the same type next, separate + * them with " -> "; if we printed a network destination + * and are printing a network source of the same type + * next, separate them with " <- "; otherwise separate them + * with a space. + * + * We add enough space to the buffer for " <- " or " -> ", + * even if we're only adding " ". + */ + line_bufp = get_line_buf(buf_offset + 4); + switch (col_item->col_fmt) { + + case COL_DEF_SRC: + case COL_RES_SRC: + case COL_UNRES_SRC: + switch (cf->cinfo.columns[i+1].col_fmt) { + + case COL_DEF_DST: + case COL_RES_DST: + case COL_UNRES_DST: + put_string(line_bufp + buf_offset, " -> ", 4); + buf_offset += 4; + break; + + default: + put_string(line_bufp + buf_offset, " ", 1); + buf_offset += 1; + break; + } + break; + + case COL_DEF_DL_SRC: + case COL_RES_DL_SRC: + case COL_UNRES_DL_SRC: + switch (cf->cinfo.columns[i+1].col_fmt) { + + case COL_DEF_DL_DST: + case COL_RES_DL_DST: + case COL_UNRES_DL_DST: + put_string(line_bufp + buf_offset, " -> ", 4); + buf_offset += 4; + break; + + default: + put_string(line_bufp + buf_offset, " ", 1); + buf_offset += 1; + break; + } + break; + + case COL_DEF_NET_SRC: + case COL_RES_NET_SRC: + case COL_UNRES_NET_SRC: + switch (cf->cinfo.columns[i+1].col_fmt) { + + case COL_DEF_NET_DST: + case COL_RES_NET_DST: + case COL_UNRES_NET_DST: + put_string(line_bufp + buf_offset, " -> ", 4); + buf_offset += 4; + break; + + default: + put_string(line_bufp + buf_offset, " ", 1); + buf_offset += 1; + break; + } + break; + + case COL_DEF_DST: + case COL_RES_DST: + case COL_UNRES_DST: + switch (cf->cinfo.columns[i+1].col_fmt) { + + case COL_DEF_SRC: + case COL_RES_SRC: + case COL_UNRES_SRC: + put_string(line_bufp + buf_offset, " <- ", 4); + buf_offset += 4; + break; + + default: + put_string(line_bufp + buf_offset, " ", 1); + buf_offset += 1; + break; + } + break; + + case COL_DEF_DL_DST: + case COL_RES_DL_DST: + case COL_UNRES_DL_DST: + switch (cf->cinfo.columns[i+1].col_fmt) { + + case COL_DEF_DL_SRC: + case COL_RES_DL_SRC: + case COL_UNRES_DL_SRC: + put_string(line_bufp + buf_offset, " <- ", 4); + buf_offset += 4; + break; + + default: + put_string(line_bufp + buf_offset, " ", 1); + buf_offset += 1; + break; + } + break; + + case COL_DEF_NET_DST: + case COL_RES_NET_DST: + case COL_UNRES_NET_DST: + switch (cf->cinfo.columns[i+1].col_fmt) { + + case COL_DEF_NET_SRC: + case COL_RES_NET_SRC: + case COL_UNRES_NET_SRC: + put_string(line_bufp + buf_offset, " <- ", 4); + buf_offset += 4; + break; + + default: + put_string(line_bufp + buf_offset, " ", 1); + buf_offset += 1; + break; + } + break; + + default: + put_string(line_bufp + buf_offset, " ", 1); + buf_offset += 1; + break; + } + } + } + return print_line(print_stream, 0, line_bufp); +} + +static gboolean +print_packet(capture_file *cf, epan_dissect_t *edt) +{ + if (print_summary || output_fields_has_cols(output_fields)) { + /* Just fill in the columns. */ + epan_dissect_fill_in_columns(edt, FALSE, TRUE); + + if (print_summary) { + /* Now print them. */ + switch (output_action) { + + case WRITE_TEXT: + if (!print_columns(cf)) + return FALSE; + break; + + case WRITE_XML: + write_psml_columns(edt, stdout, FALSE); + return !ferror(stdout); + case WRITE_FIELDS: /*No non-verbose "fields" format */ + ws_assert_not_reached(); + break; + } + } + } + if (print_details) { + /* Print the information in the protocol tree. */ + switch (output_action) { + + case WRITE_TEXT: + if (!proto_tree_print(print_details ? print_dissections_expanded : print_dissections_none, + print_hex, edt, output_only_tables, print_stream)) + return FALSE; + if (!print_hex) { + if (!print_line(print_stream, 0, separator)) + return FALSE; + } + break; + + case WRITE_XML: + write_pdml_proto_tree(NULL, edt, &cf->cinfo, stdout, FALSE); + printf("\n"); + return !ferror(stdout); + case WRITE_FIELDS: + write_fields_proto_tree(output_fields, edt, &cf->cinfo, stdout); + printf("\n"); + return !ferror(stdout); + } + } + if (print_hex) { + if (print_summary || print_details) { + if (!print_line(print_stream, 0, "")) + return FALSE; + } + if (!print_hex_data(print_stream, edt, HEXDUMP_SOURCE_MULTI | HEXDUMP_ASCII_INCLUDE)) + return FALSE; + if (!print_line(print_stream, 0, separator)) + return FALSE; + } + return TRUE; +} + +static gboolean +write_finale(void) +{ + switch (output_action) { + + case WRITE_TEXT: + return print_finale(print_stream); + + case WRITE_XML: + if (print_details) + write_pdml_finale(stdout); + else + write_psml_finale(stdout); + return !ferror(stdout); + + case WRITE_FIELDS: + write_fields_finale(output_fields, stdout); + return !ferror(stdout); + + default: + ws_assert_not_reached(); + return FALSE; + } +} + +cf_status_t +cf_open(capture_file *cf, const char *fname, unsigned int type, gboolean is_tempfile, int *err _U_) +{ + /* The open isn't implemented yet. Fill in the information for this file. */ + + /* Create new epan session for dissection. */ + epan_free(cf->epan); + cf->epan = tfshark_epan_new(cf); + + cf->provider.wth = NULL; /**** XXX - DOESN'T WORK RIGHT NOW!!!! */ + cf->f_datalen = 0; /* not used, but set it anyway */ + + /* Set the file name because we need it to set the follow stream filter. + XXX - is that still true? We need it for other reasons, though, + in any case. */ + cf->filename = g_strdup(fname); + + /* Indicate whether it's a permanent or temporary file. */ + cf->is_tempfile = is_tempfile; + + /* No user changes yet. */ + cf->unsaved_changes = FALSE; + + cf->cd_t = 0; /**** XXX - DOESN'T WORK RIGHT NOW!!!! */ + cf->open_type = type; + cf->count = 0; + cf->drops_known = FALSE; + cf->drops = 0; + cf->snap = 0; /**** XXX - DOESN'T WORK RIGHT NOW!!!! */ + nstime_set_zero(&cf->elapsed_time); + cf->provider.ref = NULL; + cf->provider.prev_dis = NULL; + cf->provider.prev_cap = NULL; + + cf->state = FILE_READ_IN_PROGRESS; + + return CF_OK; + +/* fail: */ +/* + gchar *err_info; + char err_msg[2048+1]; + snprintf(err_msg, sizeof err_msg, + cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname); + cmdarg_err("%s", err_msg); + return CF_ERROR; +*/ +} + +static void +show_print_file_io_error(int err) +{ + switch (err) { + + case ENOSPC: + cmdarg_err("Not all the packets could be printed because there is " + "no space left on the file system."); + break; + +#ifdef EDQUOT + case EDQUOT: + cmdarg_err("Not all the packets could be printed because you are " + "too close to, or over your disk quota."); + break; +#endif + + default: + cmdarg_err("An error occurred while printing packets: %s.", + g_strerror(err)); + break; + } +} + +/* + * Report an error in command-line arguments. + */ +static void +tfshark_cmdarg_err(const char *msg_format, va_list ap) +{ + fprintf(stderr, "tfshark: "); + vfprintf(stderr, msg_format, ap); + fprintf(stderr, "\n"); +} + +/* + * Report additional information for an error in command-line arguments. + */ +static void +tfshark_cmdarg_err_cont(const char *msg_format, va_list ap) +{ + vfprintf(stderr, msg_format, ap); + fprintf(stderr, "\n"); +} |