5 * Wireshark - Network traffic analyzer
6 * By Gerald Combs <gerald@wireshark.org>
7 * Copyright 1998 Gerald Combs
9 * Text-mode variant, by Gilbert Ramirez <gram@alumni.rice.edu>
10 * and Guy Harris <guy@alum.mit.edu>.
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
50 #ifdef HAVE_SYS_STAT_H
51 # include <sys/stat.h>
54 #ifdef NEED_STRERROR_H
63 #include <epan/epan.h>
64 #include <epan/filesystem.h>
65 #include <wsutil/privileges.h>
68 #include <epan/timestamp.h>
69 #include <epan/packet.h>
71 #include "disabled_protos.h"
72 #include <epan/prefs.h>
73 #include <epan/column.h>
75 #include <epan/addr_resolv.h>
77 #include "clopts_common.h"
78 #include "cmdarg_err.h"
79 #include "version_info.h"
80 #include <epan/conversation.h>
81 #include <epan/plugins.h>
83 #include <epan/epan_dissect.h>
85 #include <epan/stat_cmd_args.h>
86 #include <epan/timestamp.h>
87 #include <epan/ex-opt.h>
90 #include "capture_ui_utils.h"
92 #include "capture-pcap-util.h"
94 #include "capture-wpcap.h"
95 #include "capture_errs.h"
97 #include "capture_sync.h"
98 #endif /* HAVE_LIBPCAP */
100 #include <epan/funnel.h>
104 * This is the template for the decode as option; it is shared between the
105 * various functions that output the usage for this parameter.
107 static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
109 static nstime_t first_ts;
110 static nstime_t prev_dis_ts;
111 static nstime_t prev_cap_ts;
112 static GString *comp_info_str, *runtime_info_str;
114 static gboolean print_packet_info; /* TRUE if we're to print packet information */
116 * The way the packet decode is to be written.
119 WRITE_TEXT, /* summary or detail text */
120 WRITE_XML, /* PDML or PSML */
121 WRITE_FIELDS /* User defined list of fields */
122 /* Add CSV and the like here */
124 static output_action_e output_action;
125 static gboolean do_dissection; /* TRUE if we have to dissect each packet */
126 static gboolean verbose;
127 static gboolean print_hex;
128 static gboolean line_buffered;
129 static guint32 cum_bytes = 0;
130 static print_format_e print_format = PR_FMT_TEXT;
131 static print_stream_t *print_stream;
133 static output_fields_t* output_fields = NULL;
136 * Standard secondary message for unexpected errors.
138 static const char please_report[] =
139 "Please report this to the Wireshark developers";
143 * TRUE if we're to print packet counts to keep track of captured packets.
145 static gboolean print_packet_counts;
148 static capture_options global_capture_opts;
151 static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
152 static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
155 static int capture(void);
156 static void report_counts(void);
158 static BOOL WINAPI capture_cleanup(DWORD);
160 static void capture_cleanup(int);
162 static void report_counts_siginfo(int);
165 #endif /* HAVE_LIBPCAP */
167 static int load_cap_file(capture_file *, char *, int, int, gint64);
168 static gboolean process_packet(capture_file *cf, gint64 offset,
169 const struct wtap_pkthdr *whdr, union wtap_pseudo_header *pseudo_header,
171 static void show_capture_file_io_error(const char *, int, gboolean);
172 static void show_print_file_io_error(int err);
173 static gboolean write_preamble(capture_file *cf);
174 static gboolean print_packet(capture_file *cf, epan_dissect_t *edt);
175 static gboolean write_finale(void);
176 static const char *cf_open_error_message(int err, gchar *err_info,
177 gboolean for_writing, int file_type);
179 static void open_failure_message(const char *filename, int err,
180 gboolean for_writing);
181 static void failure_message(const char *msg_format, va_list ap);
182 static void read_failure_message(const char *filename, int err);
187 * Mark a particular frame.
191 cf_mark_frame(capture_file *cf, frame_data *frame)
193 if (! frame->flags.marked) {
194 frame->flags.marked = TRUE;
195 if (cf->count > cf->marked_count)
201 * Unmark a particular frame.
205 cf_unmark_frame(capture_file *cf, frame_data *frame)
207 if (frame->flags.marked) {
208 frame->flags.marked = FALSE;
209 if (cf->marked_count > 0)
215 static void list_capture_types(void) {
218 fprintf(stderr, "editcap: The available capture file types for \"F\":\n");
219 for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
220 if (wtap_dump_can_open(i))
221 fprintf(stderr, " %s - %s\n",
222 wtap_file_type_short_string(i), wtap_file_type_string(i));
227 print_usage(gboolean print_ver)
234 "TShark " VERSION "%s\n"
235 "Dump and analyze network traffic.\n"
236 "See http://www.wireshark.org for more information.\n"
239 wireshark_svnversion, get_copyright_info());
243 fprintf(output, "\n");
244 fprintf(output, "Usage: tshark [options] ...\n");
245 fprintf(output, "\n");
248 fprintf(output, "Capture interface:\n");
249 fprintf(output, " -i <interface> name or idx of interface (def: first non-loopback)\n");
250 fprintf(output, " -f <capture filter> packet filter in libpcap filter syntax\n");
251 fprintf(output, " -s <snaplen> packet snapshot length (def: 65535)\n");
252 fprintf(output, " -p don't capture in promiscuous mode\n");
254 fprintf(output, " -B <buffer size> size of kernel buffer (def: 1MB)\n");
256 fprintf(output, " -y <link type> link layer type (def: first appropriate)\n");
257 fprintf(output, " -D print list of interfaces and exit\n");
258 fprintf(output, " -L print list of link-layer types of iface and exit\n");
259 fprintf(output, "\n");
260 fprintf(output, "Capture stop conditions:\n");
261 fprintf(output, " -c <packet count> stop after n packets (def: infinite)\n");
262 fprintf(output, " -a <autostop cond.> ... duration:NUM - stop after NUM seconds\n");
263 fprintf(output, " filesize:NUM - stop this file after NUM KB\n");
264 fprintf(output, " files:NUM - stop after NUM files\n");
265 /*fprintf(output, "\n");*/
266 fprintf(output, "Capture output:\n");
267 fprintf(output, " -b <ringbuffer opt.> ... duration:NUM - switch to next file after NUM secs\n");
268 fprintf(output, " filesize:NUM - switch to next file after NUM KB\n");
269 fprintf(output, " files:NUM - ringbuffer: replace after NUM files\n");
270 #endif /* HAVE_LIBPCAP */
272 /*fprintf(output, "\n");*/
273 fprintf(output, "Input file:\n");
274 fprintf(output, " -r <infile> set the filename to read from (no pipes or stdin!)\n");
276 fprintf(output, "\n");
277 fprintf(output, "Processing:\n");
278 fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");
279 fprintf(output, " -n disable all name resolutions (def: all enabled)\n");
280 fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");
281 fprintf(output, " -d %s ...\n", decode_as_arg_template);
282 fprintf(output, " \"Decode As\", see the man page for details\n");
283 fprintf(output, " Example: tcp.port==8888,http\n");
285 /*fprintf(output, "\n");*/
286 fprintf(output, "Output:\n");
287 fprintf(output, " -w <outfile|-> set the output filename (or '-' for stdout)\n");
288 fprintf(output, " -C <config profile> start with specified configuration profile\n");
289 fprintf(output, " -F <output file type> set the output file type, default is libpcap\n");
290 fprintf(output, " an empty \"-F\" option will list the file types\n");
291 fprintf(output, " -V add output of packet tree (Packet Details)\n");
292 fprintf(output, " -S display packets even when writing to a file\n");
293 fprintf(output, " -x add output of hex and ASCII dump (Packet Bytes)\n");
294 fprintf(output, " -T pdml|ps|psml|text|fields\n");
295 fprintf(output, " format of text output (def: text)\n");
296 fprintf(output, " -e <field> field to print if -Tfields selected (e.g. tcp.port);\n");
297 fprintf(output, " this option can be repeated to print multiple fields\n");
298 fprintf(output, " -E<fieldsoption>=<value> set options for output when -Tfields selected:\n");
299 fprintf(output, " header=y|n switch headers on and off\n");
300 fprintf(output, " separator=/t|/s|<char> select tab, space, printable character as separator\n");
301 fprintf(output, " quote=d|s|n select double, single, no quotes for values\n");
302 fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");
303 fprintf(output, " -l flush standard output after each packet\n");
304 fprintf(output, " -q be more quiet on stdout (e.g. when using statistics)\n");
305 fprintf(output, " -X <key>:<value> eXtension options, see the man page for details\n");
306 fprintf(output, " -z <statistics> various statistics, see the man page for details\n");
308 fprintf(output, "\n");
309 fprintf(output, "Miscellaneous:\n");
310 fprintf(output, " -h display this help and exit\n");
311 fprintf(output, " -v display version info and exit\n");
312 fprintf(output, " -o <name>:<value> ... override preference setting\n");
316 * For a dissector table, print on the stream described by output,
317 * its short name (which is what's used in the "-d" option) and its
321 display_dissector_table_names(const char *table_name, const char *ui_name,
324 fprintf((FILE *)output, "\t%s (%s)\n", table_name, ui_name);
328 * For a dissector handle, print on the stream described by output,
329 * the filter name (which is what's used in the "-d" option) and the full
330 * name for the protocol that corresponds to this handle.
333 display_dissector_names(const gchar *table _U_, gpointer handle, gpointer output)
336 const gchar* proto_filter_name;
337 const gchar* proto_ui_name;
339 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
341 if (proto_id != -1) {
342 proto_filter_name = proto_get_protocol_filter_name(proto_id);
343 proto_ui_name = proto_get_protocol_name(proto_id);
344 g_assert(proto_filter_name != NULL);
345 g_assert(proto_ui_name != NULL);
347 fprintf((FILE *)output, "\t%s (%s)\n",
354 * The protocol_name_search structure is used by find_protocol_name_func()
355 * to pass parameters and store results
357 struct protocol_name_search{
358 gchar *searched_name; /* Protocol filter name we are looking for */
359 dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
360 guint nb_match; /* How many dissectors matched searched_name */
362 typedef struct protocol_name_search *protocol_name_search_t;
365 * This function parses all dissectors associated with a table to find the
366 * one whose protocol has the specified filter name. It is called
367 * as a reference function in a call to dissector_table_foreach_handle.
368 * The name we are looking for, as well as the results, are stored in the
369 * protocol_name_search struct pointed to by user_data.
370 * If called using dissector_table_foreach_handle, we actually parse the
371 * whole list of dissectors.
374 find_protocol_name_func(const gchar *table _U_, gpointer handle, gpointer user_data)
378 const gchar *protocol_filter_name;
379 protocol_name_search_t search_info;
383 search_info = (protocol_name_search_t)user_data;
385 proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
386 if (proto_id != -1) {
387 protocol_filter_name = proto_get_protocol_filter_name(proto_id);
388 g_assert(protocol_filter_name != NULL);
389 if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
391 if (search_info->nb_match == 0) {
392 /* Record this handle only if this is the first match */
393 search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
395 search_info->nb_match++;
401 * Print all layer type names supported.
402 * We send the output to the stream described by the handle output.
406 fprint_all_layer_types(FILE *output)
409 dissector_all_tables_foreach_table(display_dissector_table_names, (gpointer)output);
413 * Print all protocol names supported for a specific layer type.
414 * table_name contains the layer type name in which the search is performed.
415 * We send the output to the stream described by the handle output.
419 fprint_all_protocols_for_layer_types(FILE *output, gchar *table_name)
422 dissector_table_foreach_handle(table_name,
423 display_dissector_names,
428 * The function below parses the command-line parameters for the decode as
429 * feature (a string pointer by cl_param).
430 * It checks the format of the command-line, searches for a matching table
431 * and dissector. If a table/dissector match is not found, we display a
432 * summary of the available tables/dissectors (on stderr) and return FALSE.
433 * If everything is fine, we get the "Decode as" preference activated,
434 * then we return TRUE.
437 add_decode_as(const gchar *cl_param)
441 gchar *decoded_param;
442 gchar *remaining_param;
444 gchar *dissector_str;
445 dissector_handle_t dissector_matching;
446 dissector_table_t table_matching;
447 ftenum_t dissector_table_selector_type;
448 struct protocol_name_search user_protocol_name;
450 /* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
453 decoded_param = g_strdup(cl_param);
454 g_assert(decoded_param);
457 /* The lines below will parse this string (modifying it) to extract all
458 necessary information. Note that decoded_param is still needed since
459 strings are not copied - we just save pointers. */
461 /* This section extracts a layer type (table_name) from decoded_param */
462 table_name = decoded_param; /* Layer type string starts from beginning */
464 remaining_param = strchr(table_name, '=');
465 if (remaining_param == NULL) {
466 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
467 /* If the argument does not follow the template, carry on anyway to check
468 if the table name is at least correct. If remaining_param is NULL,
469 we'll exit anyway further down */
472 *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
475 /* Remove leading and trailing spaces from the table name */
476 while ( table_name[0] == ' ' )
478 while ( table_name[strlen(table_name) - 1] == ' ' )
479 table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
481 /* The following part searches a table matching with the layer type specified */
482 table_matching = NULL;
484 /* Look for the requested table */
485 if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
486 cmdarg_err("No layer type specified"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
489 table_matching = find_dissector_table(table_name);
490 if (!table_matching) {
491 cmdarg_err("Unknown layer type -- %s", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
495 if (!table_matching) {
496 /* Display a list of supported layer types to help the user, if the
497 specified layer type was not found */
498 cmdarg_err("Valid layer types are:");
499 fprint_all_layer_types(stderr);
501 if (remaining_param == NULL || !table_matching) {
502 /* Exit if the layer type was not found, or if no '=' separator was found
504 g_free(decoded_param);
508 if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
509 cmdarg_err("WARNING: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"", table_name, remaining_param + 1);
512 remaining_param++; /* Move to the second '=' */
513 *remaining_param = '\0'; /* Remove the second '=' */
515 remaining_param++; /* Position after the layer type string */
517 /* This section extracts a selector value (selector_str) from decoded_param */
519 selector_str = remaining_param; /* Next part starts with the selector number */
521 remaining_param = strchr(selector_str, ',');
522 if (remaining_param == NULL) {
523 cmdarg_err("Parameter \"%s\" doesn't follow the template \"%s\"", cl_param, decode_as_arg_template);
524 /* If the argument does not follow the template, carry on anyway to check
525 if the selector value is at least correct. If remaining_param is NULL,
526 we'll exit anyway further down */
529 *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
532 dissector_table_selector_type = get_dissector_table_selector_type(table_name);
534 switch (dissector_table_selector_type) {
540 /* The selector for this table is an unsigned number. Parse it as such.
541 There's no need to remove leading and trailing spaces from the
542 selector number string, because sscanf will do that for us. */
543 if ( sscanf(selector_str, "%u", &selector) != 1 ) {
544 cmdarg_err("Invalid selector number \"%s\"", selector_str);
545 g_free(decoded_param);
553 /* The selector for this table is a string. */
557 /* There are currently no dissector tables with any types other
558 than the ones listed above. */
559 g_assert_not_reached();
562 if (remaining_param == NULL) {
563 /* Exit if no ',' separator was found (see above) */
564 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
565 fprint_all_protocols_for_layer_types(stderr, table_name);
566 g_free(decoded_param);
570 remaining_param++; /* Position after the selector number string */
572 /* This section extracts a protocol filter name (dissector_str) from decoded_param */
574 dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
576 /* Remove leading and trailing spaces from the dissector name */
577 while ( dissector_str[0] == ' ' )
579 while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
580 dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
582 dissector_matching = NULL;
584 /* We now have a pointer to the handle for the requested table inside the variable table_matching */
585 if ( ! (*dissector_str) ) { /* Is the dissector name empty, if so, don't even search for a matching dissector and display all dissectors found for the selected table */
586 cmdarg_err("No protocol name specified"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
589 user_protocol_name.nb_match = 0;
590 user_protocol_name.searched_name = dissector_str;
591 user_protocol_name.matched_handle = NULL;
593 dissector_table_foreach_handle(table_name, find_protocol_name_func, &user_protocol_name); /* Go and perform the search for this dissector in the this table's dissectors' names and shortnames */
595 if (user_protocol_name.nb_match != 0) {
596 dissector_matching = user_protocol_name.matched_handle;
597 if (user_protocol_name.nb_match > 1) {
598 cmdarg_err("WARNING: Protocol \"%s\" matched %u dissectors, first one will be used", dissector_str, user_protocol_name.nb_match);
602 /* OK, check whether the problem is that there isn't any such
603 protocol, or that there is but it's not specified as a protocol
604 that's valid for that dissector table.
605 Note, we don't exit here, but dissector_matching will remain NULL,
607 if (proto_get_id_by_filter_name(dissector_str) == -1) {
608 /* No such protocol */
609 cmdarg_err("Unknown protocol -- \"%s\"", dissector_str);
611 cmdarg_err("Protocol \"%s\" isn't valid for layer type \"%s\"",
612 dissector_str, table_name);
617 if (!dissector_matching) {
618 cmdarg_err("Valid protocols for layer type \"%s\" are:", table_name);
619 fprint_all_protocols_for_layer_types(stderr, table_name);
620 g_free(decoded_param);
624 /* This is the end of the code that parses the command-line options.
625 All information is now stored in the variables:
629 The above variables that are strings are still pointing to areas within
630 decoded_parm. decoded_parm thus still needs to be kept allocated in
631 until we stop needing these variables
632 decoded_param will be deallocated at each exit point of this function */
635 /* We now have a pointer to the handle for the requested dissector
636 (requested protocol) inside the variable dissector_matching */
637 switch (dissector_table_selector_type) {
643 /* The selector for this table is an unsigned number. */
644 dissector_change(table_name, selector, dissector_matching);
650 /* The selector for this table is a string. */
651 dissector_change_string(table_name, selector_str, dissector_matching);
655 /* There are currently no dissector tables with any types other
656 than the ones listed above. */
657 g_assert_not_reached();
659 g_free(decoded_param); /* "Decode As" rule has been succesfully added */
664 log_func_ignore (const gchar *log_domain _U_, GLogLevelFlags log_level _U_,
665 const gchar *message _U_, gpointer user_data _U_)
670 output_file_description(const char *fname)
672 char *save_file_string;
674 /* Get a string that describes what we're writing to */
675 if (strcmp(fname, "-") == 0) {
676 /* We're writing to the standard output */
677 save_file_string = g_strdup("standard output");
679 /* We're writing to a file with the name in save_file */
680 save_file_string = g_strdup_printf("file \"%s\"", fname);
682 return save_file_string;
686 print_current_user(void) {
687 gchar *cur_user, *cur_group;
688 if (started_with_special_privs()) {
689 cur_user = get_cur_username();
690 cur_group = get_cur_groupname();
691 fprintf(stderr, "Running as user \"%s\" and group \"%s\".",
692 cur_user, cur_group);
695 if (running_with_special_privs()) {
696 fprintf(stderr, " This could be dangerous.");
698 fprintf(stderr, "\n");
703 check_capture_privs(void) {
706 /* Warn the user if npf.sys isn't loaded. */
707 if (!npf_sys_is_running() && get_os_major_version() >= 6) {
708 fprintf(stderr, "The NPF driver isn't running. You may have trouble "
709 "capturing or\nlisting interfaces.\n");
717 main(int argc, char *argv[])
719 char *init_progfile_dir_error;
722 gboolean arg_error = FALSE;
728 char *gpf_path, *pf_path;
729 char *gdp_path, *dp_path;
730 int gpf_open_errno, gpf_read_errno;
731 int pf_open_errno, pf_read_errno;
732 int gdp_open_errno, gdp_read_errno;
733 int dp_open_errno, dp_read_errno;
736 gboolean list_link_layer_types = FALSE;
737 gboolean start_capture = FALSE;
740 gboolean capture_option_specified = FALSE;
742 gboolean quiet = FALSE;
743 int out_file_type = WTAP_FILE_PCAP;
744 gchar *cf_name = NULL, *rfilter = NULL;
745 #ifdef HAVE_PCAP_OPEN_DEAD
746 struct bpf_program fcode;
748 dfilter_t *rfcode = NULL;
751 GLogLevelFlags log_flags;
754 #define OPTSTRING_INIT "a:b:c:C:d:De:E:f:F:G:hi:lLnN:o:pqr:R:s:St:T:vVw:xX:y:z:"
757 #define OPTSTRING_WIN32 "B:"
759 #define OPTSTRING_WIN32 ""
762 #define OPTSTRING_WIN32 ""
763 #endif /* HAVE_LIBPCAP */
765 static const char optstring[] = OPTSTRING_INIT OPTSTRING_WIN32;
768 * Get credential information for later use.
770 get_credential_info();
773 * Attempt to get the pathname of the executable file.
775 init_progfile_dir_error = init_progfile_dir(argv[0]);
776 if (init_progfile_dir_error != NULL) {
777 fprintf(stderr, "tshark: Can't get pathname of tshark program: %s.\n",
778 init_progfile_dir_error);
782 * In order to have the -X opts assigned before the wslua machine starts
783 * we need to call getopts before epan_init() gets called.
786 optind_initial = optind;
788 while ((opt = getopt(argc, argv, optstring)) != -1) {
790 case 'C': /* Configuration Profile */
791 if (profile_exists (optarg)) {
792 set_profile_name (optarg);
794 cmdarg_err("Configuration Profile \"%s\" does not exist", optarg);
806 optind = optind_initial;
809 /* nothing more than the standard GLib handler, but without a warning */
816 g_log_set_handler(NULL,
818 log_func_ignore, NULL /* user_data */);
819 g_log_set_handler(LOG_DOMAIN_CAPTURE,
821 log_func_ignore, NULL /* user_data */);
823 initialize_funnel_ops();
826 capture_opts_init(&global_capture_opts, NULL /* cfile */);
829 timestamp_set_type(TS_RELATIVE);
830 timestamp_set_precision(TS_PREC_AUTO);
832 /* Register all dissectors; we must do this before checking for the
833 "-G" flag, as the "-G" flag dumps information registered by the
834 dissectors, and we must do it before we read the preferences, in
835 case any dissectors register preferences. */
836 epan_init(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,
837 failure_message, open_failure_message, read_failure_message);
839 /* Register all tap listeners; we do this before we parse the arguments,
840 as the "-z" argument can specify a registered tap. */
842 /* we register the plugin taps before the other taps because
843 stats_tree taps plugins will be registered as tap listeners
844 by stats_tree_stat.c and need to registered before that */
846 register_all_plugin_tap_listeners();
848 register_all_tap_listeners();
850 /* Now register the preferences for any non-dissector modules.
851 We must do that before we read the preferences as well. */
852 prefs_register_modules();
854 /* If invoked with the "-G" flag, we dump out information based on
855 the argument to the "-G" flag; if no argument is specified,
856 for backwards compatibility we dump out a glossary of display
859 XXX - we do this here, for now, to support "-G" with no arguments.
860 If none of our build or other processes uses "-G" with no arguments,
861 we can just process it with the other arguments. */
862 if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
863 proto_initialize_all_prefixes();
866 proto_registrar_dump_fields(1);
868 if (strcmp(argv[2], "fields") == 0)
869 proto_registrar_dump_fields(1);
870 else if (strcmp(argv[2], "fields2") == 0)
871 proto_registrar_dump_fields(2);
872 else if (strcmp(argv[2], "fields3") == 0)
873 proto_registrar_dump_fields(3);
874 else if (strcmp(argv[2], "protocols") == 0)
875 proto_registrar_dump_protocols();
876 else if (strcmp(argv[2], "values") == 0)
877 proto_registrar_dump_values();
878 else if (strcmp(argv[2], "decodes") == 0)
879 dissector_dump_decodes();
880 else if (strcmp(argv[2], "defaultprefs") == 0)
882 else if (strcmp(argv[2], "currentprefs") == 0) {
883 read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
884 &pf_open_errno, &pf_read_errno, &pf_path);
887 cmdarg_err("Invalid \"%s\" option for -G flag", argv[2]);
894 /* Set the C-language locale to the native environment. */
895 setlocale(LC_ALL, "");
897 prefs = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
898 &pf_open_errno, &pf_read_errno, &pf_path);
899 if (gpf_path != NULL) {
900 if (gpf_open_errno != 0) {
901 cmdarg_err("Can't open global preferences file \"%s\": %s.",
902 pf_path, strerror(gpf_open_errno));
904 if (gpf_read_errno != 0) {
905 cmdarg_err("I/O error reading global preferences file \"%s\": %s.",
906 pf_path, strerror(gpf_read_errno));
909 if (pf_path != NULL) {
910 if (pf_open_errno != 0) {
911 cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,
912 strerror(pf_open_errno));
914 if (pf_read_errno != 0) {
915 cmdarg_err("I/O error reading your preferences file \"%s\": %s.",
916 pf_path, strerror(pf_read_errno));
922 /* Set the name resolution code's flags from the preferences. */
923 g_resolv_flags = prefs->name_resolve;
925 /* Read the disabled protocols file. */
926 read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,
927 &dp_path, &dp_open_errno, &dp_read_errno);
928 if (gdp_path != NULL) {
929 if (gdp_open_errno != 0) {
930 cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",
931 gdp_path, strerror(gdp_open_errno));
933 if (gdp_read_errno != 0) {
934 cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",
935 gdp_path, strerror(gdp_read_errno));
939 if (dp_path != NULL) {
940 if (dp_open_errno != 0) {
942 "Could not open your disabled protocols file\n\"%s\": %s.", dp_path,
943 strerror(dp_open_errno));
945 if (dp_read_errno != 0) {
947 "I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,
948 strerror(dp_read_errno));
953 check_capture_privs();
955 init_cap_file(&cfile);
957 /* Assemble the compile-time version information string */
958 comp_info_str = g_string_new("Compiled ");
959 get_compiled_version_info(comp_info_str, get_epan_compiled_version_info);
961 /* Assemble the run-time version information string */
962 runtime_info_str = g_string_new("Running ");
963 get_runtime_version_info(runtime_info_str, NULL);
965 /* Print format defaults to this. */
966 print_format = PR_FMT_TEXT;
968 output_fields = output_fields_new();
970 /* Now get our args */
971 while ((opt = getopt(argc, argv, optstring)) != -1) {
973 case 'a': /* autostop criteria */
974 case 'b': /* Ringbuffer option */
975 case 'c': /* Capture x packets */
976 case 'f': /* capture filter */
977 case 'i': /* Use interface x */
978 case 'p': /* Don't capture in promiscuous mode */
979 case 's': /* Set the snapshot (capture) length */
980 case 'w': /* Write to capture file x */
981 case 'y': /* Set the pcap data link type */
983 case 'B': /* Buffer size */
986 status = capture_opts_add_opt(&global_capture_opts, opt, optarg, &start_capture);
991 capture_option_specified = TRUE;
996 /* Configuration profile settings were already processed just ignore them this time*/
998 case 'd': /* Decode as rule */
999 if (!add_decode_as(optarg))
1002 case 'D': /* Print a list of capture devices and exit */
1004 status = capture_opts_list_interfaces(FALSE);
1007 capture_option_specified = TRUE;
1013 output_fields_add(output_fields, optarg);
1017 if(!output_fields_set_option(output_fields, optarg)) {
1018 cmdarg_err("\"%s\" is not a valid field output option=value pair.", optarg);
1019 output_fields_list_options(stderr);
1024 out_file_type = wtap_short_string_to_file_type(optarg);
1025 if (out_file_type < 0) {
1026 cmdarg_err("\"%s\" isn't a valid capture file type", optarg);
1027 list_capture_types();
1031 case 'h': /* Print help and exit */
1035 case 'l': /* "Line-buffer" standard output */
1036 /* This isn't line-buffering, strictly speaking, it's just
1037 flushing the standard output after the information for
1038 each packet is printed; however, that should be good
1039 enough for all the purposes to which "-l" is put (and
1040 is probably actually better for "-V", as it does fewer
1043 See the comment in "process_packet()" for an explanation of
1044 why we do that, and why we don't just use "setvbuf()" to
1045 make the standard output line-buffered (short version: in
1046 Windows, "line-buffered" is the same as "fully-buffered",
1047 and the output buffer is only flushed when it fills up). */
1048 line_buffered = TRUE;
1050 case 'L': /* Print list of link-layer types and exit */
1052 list_link_layer_types = TRUE;
1054 capture_option_specified = TRUE;
1058 case 'n': /* No name resolution */
1059 g_resolv_flags = RESOLV_NONE;
1061 case 'N': /* Select what types of addresses/port #s to resolve */
1062 if (g_resolv_flags == RESOLV_ALL)
1063 g_resolv_flags = RESOLV_NONE;
1064 badopt = string_to_name_resolve(optarg, &g_resolv_flags);
1065 if (badopt != '\0') {
1066 cmdarg_err("-N specifies unknown resolving option '%c';",
1068 cmdarg_err_cont( " Valid options are 'm', 'n', 't', and 'C'");
1072 case 'o': /* Override preference from command line */
1073 switch (prefs_set_pref(optarg)) {
1078 case PREFS_SET_SYNTAX_ERR:
1079 cmdarg_err("Invalid -o flag \"%s\"", optarg);
1083 case PREFS_SET_NO_SUCH_PREF:
1084 case PREFS_SET_OBSOLETE:
1085 cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);
1090 case 'q': /* Quiet */
1093 case 'r': /* Read capture file x */
1094 cf_name = g_strdup(optarg);
1096 case 'R': /* Read file filter */
1099 case 'S': /* show packets in real time */
1100 print_packet_info = TRUE;
1102 case 't': /* Time stamp type */
1103 if (strcmp(optarg, "r") == 0)
1104 timestamp_set_type(TS_RELATIVE);
1105 else if (strcmp(optarg, "a") == 0)
1106 timestamp_set_type(TS_ABSOLUTE);
1107 else if (strcmp(optarg, "ad") == 0)
1108 timestamp_set_type(TS_ABSOLUTE_WITH_DATE);
1109 else if (strcmp(optarg, "d") == 0)
1110 timestamp_set_type(TS_DELTA);
1111 else if (strcmp(optarg, "dd") == 0)
1112 timestamp_set_type(TS_DELTA_DIS);
1113 else if (strcmp(optarg, "e") == 0)
1114 timestamp_set_type(TS_EPOCH);
1116 cmdarg_err("Invalid time stamp type \"%s\"",
1118 cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");
1119 cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");
1123 case 'T': /* printing Type */
1124 if (strcmp(optarg, "text") == 0) {
1125 output_action = WRITE_TEXT;
1126 print_format = PR_FMT_TEXT;
1127 } else if (strcmp(optarg, "ps") == 0) {
1128 output_action = WRITE_TEXT;
1129 print_format = PR_FMT_PS;
1130 } else if (strcmp(optarg, "pdml") == 0) {
1131 output_action = WRITE_XML;
1133 } else if (strcmp(optarg, "psml") == 0) {
1134 output_action = WRITE_XML;
1136 } else if(strcmp(optarg, "fields") == 0) {
1137 output_action = WRITE_FIELDS;
1138 verbose = TRUE; /* Need full tree info */
1140 cmdarg_err("Invalid -T parameter.");
1141 cmdarg_err_cont("It must be \"ps\", \"text\", \"pdml\", \"psml\" or \"fields\".");
1145 case 'v': /* Show version and exit */
1146 printf("TShark " VERSION "%s\n"
1153 wireshark_svnversion, get_copyright_info(), comp_info_str->str,
1154 runtime_info_str->str);
1157 case 'V': /* Verbose */
1160 case 'x': /* Print packet data in hex (and ASCII) */
1166 /* We won't call the init function for the stat this soon
1167 as it would disallow MATE's fields (which are registered
1168 by the preferences set callback) from being used as
1169 part of a tap filter. Instead, we just add the argument
1170 to a list of stat arguments. */
1171 if (!process_stat_cmd_arg(optarg)) {
1172 cmdarg_err("invalid -z argument.");
1173 cmdarg_err_cont(" -z argument must be one of :");
1174 list_stat_cmd_args();
1179 case '?': /* Bad flag - print usage message */
1182 list_capture_types();
1192 /* If we specified output fields, but not the output field type... */
1193 if(WRITE_FIELDS != output_action && 0 != output_fields_num_fields(output_fields)) {
1194 cmdarg_err("Output fields were specified with \"-e\", "
1195 "but \"-Tfields\" was not specified.");
1197 } else if(WRITE_FIELDS == output_action && 0 == output_fields_num_fields(output_fields)) {
1198 cmdarg_err("\"-Tfields\" was specified, but no fields were "
1199 "specified with \"-e\".");
1204 /* If no capture filter or read filter has been specified, and there are
1205 still command-line arguments, treat them as the tokens of a capture
1206 filter (if no "-r" flag was specified) or a read filter (if a "-r"
1207 flag was specified. */
1208 if (optind < argc) {
1209 if (cf_name != NULL) {
1210 if (rfilter != NULL) {
1211 cmdarg_err("Read filters were specified both with \"-R\" "
1212 "and with additional command-line arguments");
1215 rfilter = get_args_as_string(argc, argv, optind);
1218 if (global_capture_opts.has_cfilter) {
1219 cmdarg_err("Capture filters were specified both with \"-f\""
1220 " and with additional command-line arguments");
1223 global_capture_opts.has_cfilter = TRUE;
1224 global_capture_opts.cfilter = get_args_as_string(argc, argv, optind);
1226 capture_option_specified = TRUE;
1232 if (!global_capture_opts.saving_to_file) {
1233 /* We're not saving the capture to a file; if "-q" wasn't specified,
1234 we should print packet information */
1236 print_packet_info = TRUE;
1238 /* We're saving to a file; if we're writing to the standard output.
1239 and we'll also be writing dissected packets to the standard
1240 output, reject the request. At best, we could redirect that
1241 to the standard error; we *can't* write both to the standard
1242 output and have either of them be useful. */
1243 if (strcmp(global_capture_opts.save_file, "-") == 0 && print_packet_info) {
1244 cmdarg_err("You can't write both raw packet data and dissected packets"
1245 " to the standard output.");
1250 /* We're not saving the capture to a file; if "-q" wasn't specified,
1251 we should print packet information */
1253 print_packet_info = TRUE;
1256 #ifndef HAVE_LIBPCAP
1257 if (capture_option_specified)
1258 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1265 /* We don't support capture filters when reading from a capture file
1266 (the BPF compiler doesn't support all link-layer types that we
1267 support in capture files we read). */
1269 if (cf_name != NULL) {
1270 if (global_capture_opts.has_cfilter) {
1271 cmdarg_err("Only read filters, not capture filters, "
1272 "can be specified when reading a capture file.");
1279 if (output_action != WRITE_TEXT) {
1280 cmdarg_err("Raw packet hex data can only be printed as text or PostScript");
1286 if (list_link_layer_types) {
1287 /* We're supposed to list the link-layer types for an interface;
1288 did the user also specify a capture file to be read? */
1290 /* Yes - that's bogus. */
1291 cmdarg_err("You can't specify -L and a capture file to be read.");
1294 /* No - did they specify a ring buffer option? */
1295 if (global_capture_opts.multi_files_on) {
1296 cmdarg_err("Ring buffer requested, but a capture isn't being done.");
1302 * "-r" was specified, so we're reading a capture file.
1303 * Capture options don't apply here.
1305 if (global_capture_opts.multi_files_on) {
1306 cmdarg_err("Multiple capture files requested, but "
1307 "a capture isn't being done.");
1310 if (global_capture_opts.has_file_duration) {
1311 cmdarg_err("Switching capture files after a time interval was specified, but "
1312 "a capture isn't being done.");
1315 if (global_capture_opts.has_ring_num_files) {
1316 cmdarg_err("A ring buffer of capture files was specified, but "
1317 "a capture isn't being done.");
1320 if (global_capture_opts.has_autostop_files) {
1321 cmdarg_err("A maximum number of capture files was specified, but "
1322 "a capture isn't being done.");
1326 /* Note: TShark now allows the restriction of a _read_ file by packet count
1327 * and byte count as well as a write file. Other autostop options remain valid
1328 * only for a write file.
1330 if (global_capture_opts.has_autostop_duration) {
1331 cmdarg_err("A maximum capture time was specified, but "
1332 "a capture isn't being done.");
1337 * "-r" wasn't specified, so we're doing a live capture.
1339 if (global_capture_opts.saving_to_file) {
1340 /* They specified a "-w" flag, so we'll be saving to a capture file. */
1342 /* When capturing, we only support writing libpcap format. */
1343 if (out_file_type != WTAP_FILE_PCAP) {
1344 cmdarg_err("Live captures can only be saved in libpcap format.");
1347 if (global_capture_opts.multi_files_on) {
1348 /* Multiple-file mode doesn't work under certain conditions:
1349 a) it doesn't work if you're writing to the standard output;
1350 b) it doesn't work if you're writing to a pipe;
1352 if (strcmp(global_capture_opts.save_file, "-") == 0) {
1353 cmdarg_err("Multiple capture files requested, but "
1354 "the capture is being written to the standard output.");
1357 if (global_capture_opts.output_to_pipe) {
1358 cmdarg_err("Multiple capture files requested, but "
1359 "the capture file is a pipe.");
1362 if (!global_capture_opts.has_autostop_filesize &&
1363 !global_capture_opts.has_file_duration) {
1364 cmdarg_err("Multiple capture files requested, but "
1365 "no maximum capture file size or duration was specified.");
1370 /* They didn't specify a "-w" flag, so we won't be saving to a
1371 capture file. Check for options that only make sense if
1372 we're saving to a file. */
1373 if (global_capture_opts.has_autostop_filesize) {
1374 cmdarg_err("Maximum capture file size specified, but "
1375 "capture isn't being saved to a file.");
1378 if (global_capture_opts.multi_files_on) {
1379 cmdarg_err("Multiple capture files requested, but "
1380 "the capture isn't being saved to a file.");
1389 /* Start windows sockets */
1390 WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
1393 /* Notify all registered modules that have had any of their preferences
1394 changed either from one of the preferences file or from the command
1395 line that their preferences have changed. */
1398 /* At this point MATE will have registered its field array so we can
1399 have a tap filter with one of MATE's late-registered fields as part
1400 of the filter. We can now process all the "-z" arguments. */
1401 start_requested_stats();
1403 /* disabled protocols as per configuration file */
1404 if (gdp_path == NULL && dp_path == NULL) {
1405 set_disabled_protos_list();
1408 /* Build the column format array */
1409 col_setup(&cfile.cinfo, prefs->num_cols);
1410 for (i = 0; i < cfile.cinfo.num_cols; i++) {
1411 cfile.cinfo.col_fmt[i] = get_column_format(i);
1412 cfile.cinfo.col_title[i] = g_strdup(get_column_title(i));
1413 if (cfile.cinfo.col_fmt[i] == COL_CUSTOM) {
1414 cfile.cinfo.col_custom_field[i] = g_strdup(get_column_custom_field(i));
1416 cfile.cinfo.col_custom_field[i] = NULL;
1418 cfile.cinfo.fmt_matx[i] = (gboolean *) g_malloc0(sizeof(gboolean) *
1420 get_column_format_matches(cfile.cinfo.fmt_matx[i], cfile.cinfo.col_fmt[i]);
1421 cfile.cinfo.col_data[i] = NULL;
1422 if (cfile.cinfo.col_fmt[i] == COL_INFO)
1423 cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_INFO_LEN);
1425 cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1426 cfile.cinfo.col_fence[i] = 0;
1427 cfile.cinfo.col_expr.col_expr[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1428 cfile.cinfo.col_expr.col_expr_val[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
1431 for (i = 0; i < cfile.cinfo.num_cols; i++) {
1434 for (j = 0; j < NUM_COL_FMTS; j++) {
1435 if (!cfile.cinfo.fmt_matx[i][j])
1438 if (cfile.cinfo.col_first[j] == -1)
1439 cfile.cinfo.col_first[j] = i;
1440 cfile.cinfo.col_last[j] = i;
1445 capture_opts_trim_snaplen(&global_capture_opts, MIN_PACKET_SIZE);
1446 capture_opts_trim_ring_num_files(&global_capture_opts);
1449 if (rfilter != NULL) {
1450 if (!dfilter_compile(rfilter, &rfcode)) {
1451 cmdarg_err("%s", dfilter_error_msg);
1453 #ifdef HAVE_PCAP_OPEN_DEAD
1457 pc = pcap_open_dead(DLT_EN10MB, MIN_PACKET_SIZE);
1459 if (pcap_compile(pc, &fcode, rfilter, 0, 0) != -1) {
1461 " Note: That display filter code looks like a valid capture filter;");
1463 " maybe you mixed them up?");
1472 cfile.rfcode = rfcode;
1474 if (print_packet_info) {
1475 /* If we're printing as text or PostScript, we have
1476 to create a print stream. */
1477 if (output_action == WRITE_TEXT) {
1478 switch (print_format) {
1481 print_stream = print_stream_text_stdio_new(stdout);
1485 print_stream = print_stream_ps_stdio_new(stdout);
1489 g_assert_not_reached();
1494 /* We have to dissect each packet if:
1496 we're printing information about each packet;
1498 we're using a read filter on the packets;
1500 we're using any taps. */
1501 do_dissection = print_packet_info || rfcode || have_tap_listeners();
1505 * We're reading a capture file.
1509 * Immediately relinquish any special privileges we have; we must not
1510 * be allowed to read any capture files the user running TShark
1513 relinquish_special_privs_perm();
1514 print_current_user();
1516 if (cf_open(&cfile, cf_name, FALSE, &err) != CF_OK) {
1521 /* Set timestamp precision; there should arguably be a command-line
1522 option to let the user set this. */
1523 switch(wtap_file_tsprecision(cfile.wth)) {
1524 case(WTAP_FILE_TSPREC_SEC):
1525 timestamp_set_precision(TS_PREC_AUTO_SEC);
1527 case(WTAP_FILE_TSPREC_DSEC):
1528 timestamp_set_precision(TS_PREC_AUTO_DSEC);
1530 case(WTAP_FILE_TSPREC_CSEC):
1531 timestamp_set_precision(TS_PREC_AUTO_CSEC);
1533 case(WTAP_FILE_TSPREC_MSEC):
1534 timestamp_set_precision(TS_PREC_AUTO_MSEC);
1536 case(WTAP_FILE_TSPREC_USEC):
1537 timestamp_set_precision(TS_PREC_AUTO_USEC);
1539 case(WTAP_FILE_TSPREC_NSEC):
1540 timestamp_set_precision(TS_PREC_AUTO_NSEC);
1543 g_assert_not_reached();
1546 /* Process the packets in the file */
1548 err = load_cap_file(&cfile, global_capture_opts.save_file, out_file_type,
1549 global_capture_opts.has_autostop_packets ? global_capture_opts.autostop_packets : 0,
1550 global_capture_opts.has_autostop_filesize ? global_capture_opts.autostop_filesize : 0);
1552 err = load_cap_file(&cfile, NULL, out_file_type, 0, 0);
1560 /* No capture file specified, so we're supposed to do a live capture
1561 (or get a list of link-layer types for a live capture device);
1562 do we have support for live captures? */
1569 cmdarg_err("WinPcap couldn't be found.");
1570 detailed_err = cant_load_winpcap_err("TShark");
1571 cmdarg_err_cont("%s", detailed_err);
1572 g_free(detailed_err);
1577 /* trim the interface name and exit if that failed */
1578 if (!capture_opts_trim_iface(&global_capture_opts,
1579 (prefs->capture_device) ? get_if_name(prefs->capture_device) : NULL)) {
1583 /* if requested, list the link layer types and exit */
1584 if (list_link_layer_types) {
1585 status = capture_opts_list_link_layer_types(&global_capture_opts, FALSE);
1589 if (print_packet_info) {
1590 if (!write_preamble(NULL)) {
1592 show_print_file_io_error(err);
1595 } else if (!quiet) {
1597 * We're not printing information for each packet, and the user
1598 * didn't ask us not to print a count of packets as they arrive,
1599 * so print that count so the user knows that packets are arriving.
1601 * XXX - what if the user wants to do a live capture, doesn't want
1602 * to save it to a file, doesn't want information printed for each
1603 * packet, does want some "-z" statistic, and wants packet counts
1604 * so they know whether they're seeing any packets?
1606 print_packet_counts = TRUE;
1609 /* For now, assume libpcap gives microsecond precision. */
1610 timestamp_set_precision(TS_PREC_AUTO_USEC);
1614 if (print_packet_info) {
1615 if (!write_finale()) {
1617 show_print_file_io_error(err);
1621 /* No - complain. */
1622 cmdarg_err("This version of TShark was not built with support for capturing packets.");
1627 draw_tap_listeners(TRUE);
1628 funnel_dump_all_text_windows();
1631 output_fields_free(output_fields);
1632 output_fields = NULL;
1637 /*#define USE_BROKEN_G_MAIN_LOOP*/
1639 #ifdef USE_BROKEN_G_MAIN_LOOP
1642 gboolean loop_running = FALSE;
1644 guint32 packet_count = 0;
1647 /* XXX - move to the right position / file */
1648 /* read from a pipe (callback) */
1649 typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);
1651 typedef struct pipe_input_tag {
1655 pipe_input_cb_t input_cb;
1656 guint pipe_input_id;
1658 GStaticMutex callback_running;
1662 static pipe_input_t pipe_input;
1665 /* The timer has expired, see if there's stuff to read from the pipe,
1666 if so, do the callback */
1668 pipe_timer_cb(gpointer data)
1672 gboolean result, result1;
1674 pipe_input_t *pipe_input = data;
1675 gint iterations = 0;
1678 g_static_mutex_lock (&pipe_input->callback_running);
1680 /* try to read data from the pipe only 5 times, to avoid blocking */
1681 while(iterations < 5) {
1682 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: new iteration");*/
1684 /* Oddly enough although Named pipes don't work on win9x,
1685 PeekNamedPipe does !!! */
1686 handle = (HANDLE) _get_osfhandle (pipe_input->source);
1687 result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
1689 /* Get the child process exit status */
1690 result1 = GetExitCodeProcess((HANDLE)*(pipe_input->child_process),
1693 /* If the Peek returned an error, or there are bytes to be read
1694 or the childwatcher thread has terminated then call the normal
1696 if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
1698 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: data avail");*/
1700 /* And call the real handler */
1701 if (!pipe_input->input_cb(pipe_input->source, pipe_input->user_data)) {
1702 g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: input pipe closed, iterations: %u", iterations);
1703 /* pipe closed, return false so that the timer is stopped */
1704 g_static_mutex_unlock (&pipe_input->callback_running);
1709 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: no data avail");*/
1710 /* No data, stop now */
1717 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_timer_cb: finished with iterations: %u, new timer", iterations);*/
1719 g_static_mutex_unlock (&pipe_input->callback_running);
1721 /* we didn't stopped the timer, so let it run */
1728 pipe_input_set_handler(gint source, gpointer user_data, int *child_process, pipe_input_cb_t input_cb)
1731 pipe_input.source = source;
1732 pipe_input.child_process = child_process;
1733 pipe_input.user_data = user_data;
1734 pipe_input.input_cb = input_cb;
1737 g_static_mutex_init(&pipe_input.callback_running);
1738 /* Tricky to use pipes in win9x, as no concept of wait. NT can
1739 do this but that doesn't cover all win32 platforms. GTK can do
1740 this but doesn't seem to work over processes. Attempt to do
1741 something similar here, start a timer and check for data on every
1743 /*g_log(NULL, G_LOG_LEVEL_DEBUG, "pipe_input_set_handler: new");*/
1744 pipe_input.pipe_input_id = g_timeout_add(200, pipe_timer_cb, &pipe_input);
1754 #ifdef USE_TSHARK_SELECT
1758 struct sigaction action, oldaction;
1762 * XXX - dropping privileges is still required, until code cleanup is done
1764 * remove all dependencies to pcap specific code and using only dumpcap is almost done.
1765 * when it's done, we don't need special privileges to run tshark at all,
1766 * therefore we don't need to drop these privileges
1767 * The only thing we might want to keep is a warning if tshark is run as root,
1768 * as it's no longer necessary and potentially dangerous.
1770 * THE FOLLOWING IS THE FORMER COMMENT WHICH IS NO LONGER REALLY VALID:
1771 * We've opened the capture device, so we shouldn't need any special
1772 * privileges any more; relinquish those privileges.
1774 * XXX - if we have saved set-user-ID support, we should give up those
1775 * privileges immediately, and then reclaim them long enough to get
1776 * a list of network interfaces and to open one, and then give them
1777 * up again, so that stuff we do while processing the argument list,
1778 * reading the user's preferences, loading and starting plugins
1779 * (especially *user* plugins), etc. is done with the user's privileges,
1780 * not special privileges.
1782 relinquish_special_privs_perm();
1783 print_current_user();
1785 /* Initialize all data structures used for dissection. */
1789 /* Catch a CTRL+C event and, if we get it, clean up and exit. */
1790 SetConsoleCtrlHandler(capture_cleanup, TRUE);
1792 /* Catch SIGINT and SIGTERM and, if we get either of them, clean up
1794 action.sa_handler = capture_cleanup;
1795 action.sa_flags = 0;
1796 sigemptyset(&action.sa_mask);
1797 sigaction(SIGTERM, &action, NULL);
1798 sigaction(SIGINT, &action, NULL);
1799 sigaction(SIGHUP, NULL, &oldaction);
1800 if (oldaction.sa_handler == SIG_DFL)
1801 sigaction(SIGHUP, &action, NULL);
1804 /* Catch SIGINFO and, if we get it and we're capturing to a file in
1805 quiet mode, report the number of packets we've captured. */
1806 action.sa_handler = report_counts_siginfo;
1807 action.sa_flags = 0;
1808 sigemptyset(&action.sa_mask);
1809 sigaction(SIGINFO, &action, NULL);
1810 #endif /* SIGINFO */
1813 global_capture_opts.state = CAPTURE_PREPARING;
1815 /* Let the user know what interface was chosen. */
1816 global_capture_opts.iface_descr = get_interface_descriptive_name(global_capture_opts.iface);
1817 fprintf(stderr, "Capturing on %s\n", global_capture_opts.iface_descr);
1819 ret = sync_pipe_start(&global_capture_opts);
1824 /* the actual capture loop
1826 * XXX - glib doesn't seem to provide any event based loop handling.
1828 * XXX - for whatever reason,
1829 * calling g_main_loop_new() ends up in 100% cpu load.
1831 * But that doesn't matter: in UNIX we can use select() to find an input
1832 * source with something to do.
1834 * But that doesn't matter because we're in a CLI (that doesn't need to
1835 * update a GUI or something at the same time) so it's OK if we block
1836 * trying to read from the pipe.
1838 * So all the stuff in USE_TSHARK_SELECT could be removed unless I'm
1839 * wrong (but I leave it there in case I am...).
1842 #ifdef USE_TSHARK_SELECT
1844 FD_SET(pipe_input.source, &readfds);
1847 loop_running = TRUE;
1849 while (loop_running)
1851 #ifdef USE_TSHARK_SELECT
1852 ret = select(pipe_input.source+1, &readfds, NULL, NULL, NULL);
1858 } else if (ret == 1) {
1860 /* Call the real handler */
1861 if (!pipe_input.input_cb(pipe_input.source, pipe_input.user_data)) {
1862 g_log(NULL, G_LOG_LEVEL_DEBUG, "input pipe closed");
1865 #ifdef USE_TSHARK_SELECT
1874 /* XXX - move the call to main_window_update() out of capture_sync.c */
1875 /* dummy for capture_sync.c to make linker happy */
1876 void main_window_update(void)
1880 /* capture child detected an error */
1882 capture_input_error_message(capture_options *capture_opts _U_, char *error_msg, char *secondary_error_msg)
1884 cmdarg_err("%s", error_msg);
1885 cmdarg_err_cont("%s", secondary_error_msg);
1889 /* capture child detected an capture filter related error */
1891 capture_input_cfilter_error_message(capture_options *capture_opts, char *error_message)
1893 dfilter_t *rfcode = NULL;
1896 if (dfilter_compile(capture_opts->cfilter, &rfcode) && rfcode != NULL) {
1898 "Invalid capture filter: \"%s\"!\n"
1900 "That string looks like a valid display filter; however, it isn't a valid\n"
1901 "capture filter (%s).\n"
1903 "Note that display filters and capture filters don't have the same syntax,\n"
1904 "so you can't use most display filter expressions as capture filters.\n"
1906 "See the User's Guide for a description of the capture filter syntax.",
1907 capture_opts->cfilter, error_message);
1908 dfilter_free(rfcode);
1911 "Invalid capture filter: \"%s\"!\n"
1913 "That string isn't a valid capture filter (%s).\n"
1914 "See the User's Guide for a description of the capture filter syntax.",
1915 capture_opts->cfilter, error_message);
1920 /* capture child tells us we have a new (or the first) capture file */
1922 capture_input_new_file(capture_options *capture_opts, gchar *new_file)
1924 gboolean is_tempfile;
1928 if(capture_opts->state == CAPTURE_PREPARING) {
1929 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture started!");
1931 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "File: \"%s\"", new_file);
1933 g_assert(capture_opts->state == CAPTURE_PREPARING || capture_opts->state == CAPTURE_RUNNING);
1935 capture_opts->cf = &cfile;
1937 /* free the old filename */
1938 if(capture_opts->save_file != NULL) {
1939 /* we start a new capture file, close the old one (if we had one before) */
1940 if( ((capture_file *) capture_opts->cf)->state != FILE_CLOSED) {
1941 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
1942 wtap_close(((capture_file *) capture_opts->cf)->wth);
1945 g_free(capture_opts->save_file);
1946 is_tempfile = FALSE;
1948 /* we didn't had a save_file before, must be a tempfile */
1952 /* save the new filename */
1953 capture_opts->save_file = g_strdup(new_file);
1955 /* if we are in real-time mode, open the new file now */
1957 /* Attempt to open the capture file and set up to read from it. */
1958 switch(cf_open(capture_opts->cf, capture_opts->save_file, is_tempfile, &err)) {
1962 /* Don't unlink (delete) the save file - leave it around,
1963 for debugging purposes. */
1964 g_free(capture_opts->save_file);
1965 capture_opts->save_file = NULL;
1970 capture_opts->state = CAPTURE_RUNNING;
1976 /* capture child tells us we have new packets to read */
1978 capture_input_new_packets(capture_options *capture_opts, int to_read)
1984 capture_file *cf = capture_opts->cf;
1989 * Prevent a SIGINFO handler from writing to stdout while we're
1990 * doing so; instead, have it just set a flag telling us to print
1991 * that information when we're done.
1994 #endif /* SIGINFO */
1997 while (to_read-- && cf->wth) {
1998 ret = wtap_read(cf->wth, &err, &err_info, &data_offset);
2000 /* read from file failed, tell the capture child to stop */
2001 sync_pipe_stop(capture_opts);
2002 wtap_close(cf->wth);
2005 ret = process_packet(cf, data_offset, wtap_phdr(cf->wth),
2006 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth));
2009 /* packet sucessfully read and gone through the "Read Filter" */
2015 * Dumpcap's doing all the work; we're not doing any dissection.
2016 * Count all the packets it wrote.
2018 packet_count += to_read;
2021 if (print_packet_counts) {
2022 /* We're printing packet counts. */
2023 if (packet_count != 0) {
2024 fprintf(stderr, "\r%u ", packet_count);
2025 /* stderr could be line buffered */
2032 * Allow SIGINFO handlers to write.
2037 * If a SIGINFO handler asked us to write out capture counts, do so.
2041 #endif /* SIGINFO */
2047 if (!print_packet_counts) {
2048 /* Report the count only if we aren't printing a packet count
2049 as packets arrive. */
2050 fprintf(stderr, "%u packet%s captured\n", packet_count,
2051 plurality(packet_count, "", "s"));
2054 infoprint = FALSE; /* we just reported it */
2055 #endif /* SIGINFO */
2060 report_counts_siginfo(int signum _U_)
2062 int sav_errno = errno;
2063 /* If we've been told to delay printing, just set a flag asking
2064 that we print counts (if we're supposed to), otherwise print
2065 the count of packets captured (if we're supposed to). */
2072 #endif /* SIGINFO */
2075 /* capture child detected any packet drops? */
2077 capture_input_drops(capture_options *capture_opts _U_, guint32 dropped)
2079 if (print_packet_counts) {
2080 /* We're printing packet counts to stderr.
2081 Send a newline so that we move to the line after the packet count. */
2082 fprintf(stderr, "\n");
2086 /* We're printing packet counts to stderr.
2087 Send a newline so that we move to the line after the packet count. */
2088 fprintf(stderr, "%u packet%s dropped\n", dropped, plurality(dropped, "", "s"));
2093 /* capture child closed its side of the pipe, do the required cleanup */
2095 capture_input_closed(capture_options *capture_opts)
2099 if(capture_opts->cf != NULL && ((capture_file *) capture_opts->cf)->wth != NULL) {
2100 wtap_close(((capture_file *) capture_opts->cf)->wth);
2102 #ifdef USE_BROKEN_G_MAIN_LOOP
2103 /*g_main_loop_quit(loop);*/
2106 loop_running = FALSE;
2115 capture_cleanup(DWORD ctrltype _U_)
2117 /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
2118 Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
2119 is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
2120 like SIGTERM at least when the machine's shutting down.
2122 For now, we handle them all as indications that we should clean up
2123 and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
2126 However, as handlers run in a new thread, we can't just longjmp
2127 out; we have to set "ld.go" to FALSE, and must return TRUE so that
2128 no other handler - such as one that would terminate the process -
2131 XXX - for some reason, typing ^C to TShark, if you run this in
2132 a Cygwin console window in at least some versions of Cygwin,
2133 causes TShark to terminate immediately; this routine gets
2134 called, but the main loop doesn't get a chance to run and
2135 exit cleanly, at least if this is compiled with Microsoft Visual
2136 C++ (i.e., it's a property of the Cygwin console window or Bash;
2137 it happens if TShark is not built with Cygwin - for all I know,
2138 building it with Cygwin may make the problem go away). */
2140 /* tell the capture child to stop */
2141 sync_pipe_stop(&global_capture_opts);
2143 /* don't stop our own loop already here, otherwise status messages and
2144 * cleanup wouldn't be done properly. The child will indicate the stop of
2145 * everything by calling capture_input_closed() later */
2151 capture_cleanup(int signum _U_)
2153 /* tell the capture child to stop */
2154 sync_pipe_stop(&global_capture_opts);
2157 #endif /* HAVE_LIBPCAP */
2160 load_cap_file(capture_file *cf, char *save_file, int out_file_type,
2161 int max_packet_count, gint64 max_byte_count)
2164 int snapshot_length;
2169 char *save_file_string = NULL;
2171 linktype = wtap_file_encap(cf->wth);
2172 if (save_file != NULL) {
2173 /* Get a string that describes what we're writing to */
2174 save_file_string = output_file_description(save_file);
2176 /* Set up to write to the capture file. */
2177 snapshot_length = wtap_snapshot_length(cf->wth);
2178 if (snapshot_length == 0) {
2179 /* Snapshot length of input file not known. */
2180 snapshot_length = WTAP_MAX_PACKET_SIZE;
2182 pdh = wtap_dump_open(save_file, out_file_type, linktype, snapshot_length,
2183 FALSE /* compressed */, &err);
2186 /* We couldn't set up to write to the capture file. */
2189 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2190 cmdarg_err("Capture files can't be written in that format.");
2193 case WTAP_ERR_UNSUPPORTED_ENCAP:
2194 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2195 cmdarg_err("The capture file being read can't be written in "
2199 case WTAP_ERR_CANT_OPEN:
2200 cmdarg_err("The %s couldn't be created for some "
2201 "unknown reason.", save_file_string);
2204 case WTAP_ERR_SHORT_WRITE:
2205 cmdarg_err("A full header couldn't be written to the %s.",
2210 cmdarg_err("The %s could not be created: %s.", save_file_string,
2211 wtap_strerror(err));
2217 if (print_packet_info) {
2218 if (!write_preamble(cf)) {
2220 show_print_file_io_error(err);
2226 while (wtap_read(cf->wth, &err, &err_info, &data_offset)) {
2227 if (process_packet(cf, data_offset, wtap_phdr(cf->wth),
2228 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth))) {
2229 /* Either there's no read filtering or this packet passed the
2230 filter, so, if we're writing to a capture file, write
2233 if (!wtap_dump(pdh, wtap_phdr(cf->wth),
2234 wtap_pseudoheader(cf->wth), wtap_buf_ptr(cf->wth),
2236 /* Error writing to a capture file */
2237 show_capture_file_io_error(save_file, err, FALSE);
2238 wtap_dump_close(pdh, &err);
2242 /* Stop reading if we have the maximum number of packets;
2243 * When the -c option has not been used, max_packet_count
2244 * starts at 0, which practically means, never stop reading.
2245 * (unless we roll over max_packet_count ?)
2247 if( (--max_packet_count == 0) || (max_byte_count != 0 && data_offset >= max_byte_count)) {
2248 err = 0; /* This is not an error */
2254 /* Print a message noting that the read failed somewhere along the line. */
2257 case WTAP_ERR_UNSUPPORTED_ENCAP:
2258 cmdarg_err("\"%s\" has a packet with a network type that TShark doesn't support.\n(%s)",
2259 cf->filename, err_info);
2263 case WTAP_ERR_CANT_READ:
2264 cmdarg_err("An attempt to read from \"%s\" failed for some unknown reason.",
2268 case WTAP_ERR_SHORT_READ:
2269 cmdarg_err("\"%s\" appears to have been cut short in the middle of a packet.",
2273 case WTAP_ERR_BAD_RECORD:
2274 cmdarg_err("\"%s\" appears to be damaged or corrupt.\n(%s)",
2275 cf->filename, err_info);
2280 cmdarg_err("An error occurred while reading \"%s\": %s.",
2281 cf->filename, wtap_strerror(err));
2284 if (save_file != NULL) {
2285 /* Now close the capture file. */
2286 if (!wtap_dump_close(pdh, &err))
2287 show_capture_file_io_error(save_file, err, TRUE);
2290 if (save_file != NULL) {
2291 /* Now close the capture file. */
2292 if (!wtap_dump_close(pdh, &err))
2293 show_capture_file_io_error(save_file, err, TRUE);
2295 if (print_packet_info) {
2296 if (!write_finale()) {
2298 show_print_file_io_error(err);
2305 wtap_close(cf->wth);
2308 if (save_file_string != NULL)
2309 g_free(save_file_string);
2315 fill_in_fdata(frame_data *fdata, capture_file *cf,
2316 const struct wtap_pkthdr *phdr, gint64 offset)
2321 fdata->num = cf->count;
2322 fdata->pkt_len = phdr->len;
2323 cum_bytes += phdr->len;
2324 fdata->cum_bytes = cum_bytes;
2325 fdata->cap_len = phdr->caplen;
2326 fdata->file_off = offset;
2327 fdata->lnk_t = phdr->pkt_encap;
2328 fdata->abs_ts.secs = phdr->ts.secs;
2329 fdata->abs_ts.nsecs = phdr->ts.nsecs;
2330 fdata->flags.passed_dfilter = 0;
2331 fdata->flags.encoding = CHAR_ASCII;
2332 fdata->flags.visited = 0;
2333 fdata->flags.marked = 0;
2334 fdata->flags.ref_time = 0;
2335 fdata->color_filter = NULL;
2337 /* If we don't have the time stamp of the first packet in the
2338 capture, it's because this is the first packet. Save the time
2339 stamp of this packet as the time stamp of the first packet. */
2340 if (nstime_is_unset(&first_ts)) {
2341 first_ts = fdata->abs_ts;
2344 /* If we don't have the time stamp of the previous captured packet,
2345 it's because this is the first packet. Save the time
2346 stamp of this packet as the time stamp of the previous captured
2348 if (nstime_is_unset(&prev_cap_ts)) {
2349 prev_cap_ts = fdata->abs_ts;
2352 /* Get the time elapsed between the first packet and this packet. */
2353 nstime_delta(&fdata->rel_ts, &fdata->abs_ts, &first_ts);
2355 /* If it's greater than the current elapsed time, set the elapsed time
2356 to it (we check for "greater than" so as not to be confused by
2357 time moving backwards). */
2358 if ((gint32)cf->elapsed_time.secs < fdata->rel_ts.secs
2359 || ((gint32)cf->elapsed_time.secs == fdata->rel_ts.secs && (gint32)cf->elapsed_time.nsecs < fdata->rel_ts.nsecs)) {
2360 cf->elapsed_time = fdata->rel_ts;
2363 /* If we don't have the time stamp of the previous displayed packet,
2364 it's because this is the first packet that's being displayed. Save the time
2365 stamp of this packet as the time stamp of the previous displayed
2367 if (nstime_is_unset(&prev_dis_ts))
2368 prev_dis_ts = fdata->abs_ts;
2370 /* Get the time elapsed between the previous displayed packet and
2372 nstime_delta(&fdata->del_dis_ts, &fdata->abs_ts, &prev_dis_ts);
2374 /* Get the time elapsed between the previous captured packet and
2376 nstime_delta(&fdata->del_cap_ts, &fdata->abs_ts, &prev_cap_ts);
2377 prev_cap_ts = fdata->abs_ts;
2380 /* Free up all data attached to a "frame_data" structure. */
2382 clear_fdata(frame_data *fdata)
2385 g_slist_free(fdata->pfd);
2389 process_packet(capture_file *cf, gint64 offset, const struct wtap_pkthdr *whdr,
2390 union wtap_pseudo_header *pseudo_header, const guchar *pd)
2393 gboolean create_proto_tree;
2394 epan_dissect_t *edt;
2397 /* Count this packet. */
2400 /* If we're going to print packet information, or we're going to
2401 run a read filter, or we're going to process taps, set up to
2402 do a dissection and do so. */
2403 if (do_dissection) {
2404 fill_in_fdata(&fdata, cf, whdr, offset);
2406 if (print_packet_info) {
2407 /* Grab any resolved addresses */
2409 if (g_resolv_flags) {
2410 host_name_lookup_process(NULL);
2415 if (cf->rfcode || verbose || num_tap_filters!=0 || have_custom_cols(&cf->cinfo))
2416 create_proto_tree = TRUE;
2418 create_proto_tree = FALSE;
2419 /* The protocol tree will be "visible", i.e., printed, only if we're
2420 printing packet details, which is true if we're printing stuff
2421 ("print_packet_info" is true) and we're in verbose mode ("verbose"
2423 edt = epan_dissect_new(create_proto_tree, print_packet_info && verbose);
2425 /* If we're running a read filter, prime the epan_dissect_t with that
2428 epan_dissect_prime_dfilter(edt, cf->rfcode);
2430 col_custom_prime_edt(edt, &cf->cinfo);
2432 tap_queue_init(edt);
2434 /* We only need the columns if we're printing packet info but we're
2435 *not* verbose; in verbose mode, we print the protocol tree, not
2436 the protocol summary. */
2437 epan_dissect_run(edt, pseudo_header, pd, &fdata,
2438 (print_packet_info && !verbose) ? &cf->cinfo : NULL);
2440 tap_push_tapped_queue(edt);
2442 /* Run the read filter if we have one. */
2444 passed = dfilter_apply_edt(cf->rfcode, edt);
2448 /* We're not running a display filter and we're not printing any
2449 packet information, so we don't need to do a dissection, and all
2450 packets are processed. */
2456 /* Keep the time of the current packet if the packet passed
2457 the read filter so that the delta time since last displayed
2458 packet can be calculated */
2459 prev_dis_ts = fdata.abs_ts;
2461 /* Process this packet. */
2462 if (print_packet_info) {
2463 /* We're printing packet information; print the information for
2465 print_packet(cf, edt);
2467 /* The ANSI C standard does not appear to *require* that a line-buffered
2468 stream be flushed to the host environment whenever a newline is
2469 written, it just says that, on such a stream, characters "are
2470 intended to be transmitted to or from the host environment as a
2471 block when a new-line character is encountered".
2473 The Visual C++ 6.0 C implementation doesn't do what is intended;
2474 even if you set a stream to be line-buffered, it still doesn't
2475 flush the buffer at the end of every line.
2477 So, if the "-l" flag was specified, we flush the standard output
2478 at the end of a packet. This will do the right thing if we're
2479 printing packet summary lines, and, as we print the entire protocol
2480 tree for a single packet without waiting for anything to happen,
2481 it should be as good as line-buffered mode if we're printing
2482 protocol trees. (The whole reason for the "-l" flag in either
2483 tcpdump or TShark is to allow the output of a live capture to
2484 be piped to a program or script and to have that script see the
2485 information for the packet as soon as it's printed, rather than
2486 having to wait until a standard I/O buffer fills up. */
2490 if (ferror(stdout)) {
2491 show_print_file_io_error(errno);
2497 if (do_dissection) {
2498 epan_dissect_free(edt);
2499 clear_fdata(&fdata);
2505 show_capture_file_io_error(const char *fname, int err, gboolean is_close)
2507 char *save_file_string;
2509 save_file_string = output_file_description(fname);
2514 cmdarg_err("Not all the packets could be written to the %s because there is "
2515 "no space left on the file system.",
2521 cmdarg_err("Not all the packets could be written to the %s because you are "
2522 "too close to, or over your disk quota.",
2527 case WTAP_ERR_CANT_CLOSE:
2528 cmdarg_err("The %s couldn't be closed for some unknown reason.",
2532 case WTAP_ERR_SHORT_WRITE:
2533 cmdarg_err("Not all the packets could be written to the %s.",
2539 cmdarg_err("The %s could not be closed: %s.", save_file_string,
2540 wtap_strerror(err));
2542 cmdarg_err("An error occurred while writing to the %s: %s.",
2543 save_file_string, wtap_strerror(err));
2547 g_free(save_file_string);
2551 write_preamble(capture_file *cf)
2553 switch (output_action) {
2556 return print_preamble(print_stream, cf ? cf->filename : NULL);
2560 write_pdml_preamble(stdout);
2562 write_psml_preamble(stdout);
2563 return !ferror(stdout);
2566 write_fields_preamble(output_fields, stdout);
2567 return !ferror(stdout);
2570 g_assert_not_reached();
2576 get_line_buf(size_t len)
2578 static char *line_bufp = NULL;
2579 static size_t line_buf_len = 256;
2580 size_t new_line_buf_len;
2582 for (new_line_buf_len = line_buf_len; len > new_line_buf_len;
2583 new_line_buf_len *= 2)
2585 if (line_bufp == NULL) {
2586 line_buf_len = new_line_buf_len;
2587 line_bufp = g_malloc(line_buf_len + 1);
2589 if (new_line_buf_len > line_buf_len) {
2590 line_buf_len = new_line_buf_len;
2591 line_bufp = g_realloc(line_bufp, line_buf_len + 1);
2598 print_columns(capture_file *cf)
2605 line_bufp = get_line_buf(256);
2608 for (i = 0; i < cf->cinfo.num_cols; i++) {
2609 switch (cf->cinfo.col_fmt[i]) {
2613 * Don't print this if we're doing a live capture from a network
2614 * interface - if we're doing a live capture, you won't be
2615 * able to look at the capture in the future (it's not being
2616 * saved anywhere), so the frame numbers are unlikely to be
2619 * (XXX - it might be nice to be able to save and print at
2620 * the same time, sort of like an "Update list of packets
2621 * in real time" capture in Wireshark.)
2623 if (global_capture_opts.iface != NULL)
2626 column_len = strlen(cf->cinfo.col_data[i]);
2629 line_bufp = get_line_buf(buf_offset + column_len);
2630 sprintf(line_bufp + buf_offset, "%3s", cf->cinfo.col_data[i]);
2636 case COL_ABS_DATE_TIME: /* XXX - wider */
2637 column_len = strlen(cf->cinfo.col_data[i]);
2638 if (column_len < 10)
2640 line_bufp = get_line_buf(buf_offset + column_len);
2641 sprintf(line_bufp + buf_offset, "%10s", cf->cinfo.col_data[i]);
2647 case COL_DEF_DL_SRC:
2648 case COL_RES_DL_SRC:
2649 case COL_UNRES_DL_SRC:
2650 case COL_DEF_NET_SRC:
2651 case COL_RES_NET_SRC:
2652 case COL_UNRES_NET_SRC:
2653 column_len = strlen(cf->cinfo.col_data[i]);
2654 if (column_len < 12)
2656 line_bufp = get_line_buf(buf_offset + column_len);
2657 sprintf(line_bufp + buf_offset, "%12s", cf->cinfo.col_data[i]);
2663 case COL_DEF_DL_DST:
2664 case COL_RES_DL_DST:
2665 case COL_UNRES_DL_DST:
2666 case COL_DEF_NET_DST:
2667 case COL_RES_NET_DST:
2668 case COL_UNRES_NET_DST:
2669 column_len = strlen(cf->cinfo.col_data[i]);
2670 if (column_len < 12)
2672 line_bufp = get_line_buf(buf_offset + column_len);
2673 sprintf(line_bufp + buf_offset, "%-12s", cf->cinfo.col_data[i]);
2677 column_len = strlen(cf->cinfo.col_data[i]);
2678 line_bufp = get_line_buf(buf_offset + column_len);
2679 strcat(line_bufp + buf_offset, cf->cinfo.col_data[i]);
2682 buf_offset += column_len;
2683 if (i != cf->cinfo.num_cols - 1) {
2685 * This isn't the last column, so we need to print a
2686 * separator between this column and the next.
2688 * If we printed a network source and are printing a
2689 * network destination of the same type next, separate
2690 * them with "->"; if we printed a network destination
2691 * and are printing a network source of the same type
2692 * next, separate them with "<-"; otherwise separate them
2695 * We add enough space to the buffer for " <- " or " -> ",
2696 * even if we're only adding " ".
2698 line_bufp = get_line_buf(buf_offset + 4);
2699 switch (cf->cinfo.col_fmt[i]) {
2704 switch (cf->cinfo.col_fmt[i + 1]) {
2709 strcat(line_bufp + buf_offset, " -> ");
2714 strcat(line_bufp + buf_offset, " ");
2720 case COL_DEF_DL_SRC:
2721 case COL_RES_DL_SRC:
2722 case COL_UNRES_DL_SRC:
2723 switch (cf->cinfo.col_fmt[i + 1]) {
2725 case COL_DEF_DL_DST:
2726 case COL_RES_DL_DST:
2727 case COL_UNRES_DL_DST:
2728 strcat(line_bufp + buf_offset, " -> ");
2733 strcat(line_bufp + buf_offset, " ");
2739 case COL_DEF_NET_SRC:
2740 case COL_RES_NET_SRC:
2741 case COL_UNRES_NET_SRC:
2742 switch (cf->cinfo.col_fmt[i + 1]) {
2744 case COL_DEF_NET_DST:
2745 case COL_RES_NET_DST:
2746 case COL_UNRES_NET_DST:
2747 strcat(line_bufp + buf_offset, " -> ");
2752 strcat(line_bufp + buf_offset, " ");
2761 switch (cf->cinfo.col_fmt[i + 1]) {
2766 strcat(line_bufp + buf_offset, " <- ");
2771 strcat(line_bufp + buf_offset, " ");
2777 case COL_DEF_DL_DST:
2778 case COL_RES_DL_DST:
2779 case COL_UNRES_DL_DST:
2780 switch (cf->cinfo.col_fmt[i + 1]) {
2782 case COL_DEF_DL_SRC:
2783 case COL_RES_DL_SRC:
2784 case COL_UNRES_DL_SRC:
2785 strcat(line_bufp + buf_offset, " <- ");
2790 strcat(line_bufp + buf_offset, " ");
2796 case COL_DEF_NET_DST:
2797 case COL_RES_NET_DST:
2798 case COL_UNRES_NET_DST:
2799 switch (cf->cinfo.col_fmt[i + 1]) {
2801 case COL_DEF_NET_SRC:
2802 case COL_RES_NET_SRC:
2803 case COL_UNRES_NET_SRC:
2804 strcat(line_bufp + buf_offset, " <- ");
2809 strcat(line_bufp + buf_offset, " ");
2816 strcat(line_bufp + buf_offset, " ");
2822 return print_line(print_stream, 0, line_bufp);
2826 print_packet(capture_file *cf, epan_dissect_t *edt)
2828 print_args_t print_args;
2831 /* Print the information in the protocol tree. */
2832 switch (output_action) {
2835 print_args.to_file = TRUE;
2836 print_args.format = print_format;
2837 print_args.print_summary = !verbose;
2838 print_args.print_hex = verbose && print_hex;
2839 print_args.print_formfeed = FALSE;
2840 print_args.print_dissections = verbose ? print_dissections_expanded : print_dissections_none;
2842 /* init the packet range */
2843 packet_range_init(&print_args.range);
2845 if (!proto_tree_print(&print_args, edt, print_stream))
2848 /* "print_hex_data()" will put out a leading blank line, as well
2849 as a trailing one; print one here, to separate the packets,
2850 only if "print_hex_data()" won't be called. */
2851 if (!print_line(print_stream, 0, ""))
2857 proto_tree_write_pdml(edt, stdout);
2859 return !ferror(stdout);
2861 proto_tree_write_fields(output_fields, edt, stdout);
2863 return !ferror(stdout);
2866 /* Just fill in the columns. */
2867 epan_dissect_fill_in_columns(edt);
2869 /* Now print them. */
2870 switch (output_action) {
2873 if (!print_columns(cf))
2878 proto_tree_write_psml(edt, stdout);
2879 return !ferror(stdout);
2880 case WRITE_FIELDS: /*No non-verbose "fields" format */
2881 g_assert_not_reached();
2886 if (!print_hex_data(print_stream, edt))
2888 if (!print_line(print_stream, 0, ""))
2897 switch (output_action) {
2900 return print_finale(print_stream);
2904 write_pdml_finale(stdout);
2906 write_psml_finale(stdout);
2907 return !ferror(stdout);
2910 write_fields_finale(output_fields, stdout);
2911 return !ferror(stdout);
2914 g_assert_not_reached();
2920 show_print_file_io_error(int err)
2925 cmdarg_err("Not all the packets could be printed because there is "
2926 "no space left on the file system.");
2931 cmdarg_err("Not all the packets could be printed because you are "
2932 "too close to, or over your disk quota.");
2937 cmdarg_err("An error occurred while printing packets: %s.",
2944 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
2948 static char errmsg_errno[1024+1];
2951 /* Wiretap error. */
2954 case WTAP_ERR_NOT_REGULAR_FILE:
2955 errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
2958 case WTAP_ERR_FILE_UNKNOWN_FORMAT:
2959 /* Seen only when opening a capture file for reading. */
2960 errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
2963 case WTAP_ERR_UNSUPPORTED:
2964 /* Seen only when opening a capture file for reading. */
2965 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2966 "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
2969 errmsg = errmsg_errno;
2972 case WTAP_ERR_CANT_WRITE_TO_PIPE:
2973 /* Seen only when opening a capture file for writing. */
2974 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2975 "The file \"%%s\" is a pipe, and %s capture files can't be "
2976 "written to a pipe.", wtap_file_type_string(file_type));
2977 errmsg = errmsg_errno;
2980 case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
2981 /* Seen only when opening a capture file for writing. */
2982 errmsg = "TShark doesn't support writing capture files in that format.";
2985 case WTAP_ERR_UNSUPPORTED_ENCAP:
2987 errmsg = "TShark can't save this capture in that format.";
2989 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
2990 "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
2993 errmsg = errmsg_errno;
2997 case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
2999 errmsg = "TShark can't save this capture in that format.";
3001 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
3004 case WTAP_ERR_BAD_RECORD:
3005 /* Seen only when opening a capture file for reading. */
3006 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3007 "The file \"%%s\" appears to be damaged or corrupt.\n"
3010 errmsg = errmsg_errno;
3013 case WTAP_ERR_CANT_OPEN:
3015 errmsg = "The file \"%s\" could not be created for some unknown reason.";
3017 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
3020 case WTAP_ERR_SHORT_READ:
3021 errmsg = "The file \"%s\" appears to have been cut short"
3022 " in the middle of a packet or other data.";
3025 case WTAP_ERR_SHORT_WRITE:
3026 errmsg = "A full header couldn't be written to the file \"%s\".";
3030 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
3031 "The file \"%%s\" could not be %s: %s.",
3032 for_writing ? "created" : "opened",
3033 wtap_strerror(err));
3034 errmsg = errmsg_errno;
3038 errmsg = file_open_error_message(err, for_writing);
3043 * Open/create errors are reported with an console message in TShark.
3046 open_failure_message(const char *filename, int err, gboolean for_writing)
3048 fprintf(stderr, "tshark: ");
3049 fprintf(stderr, file_open_error_message(err, for_writing), filename);
3050 fprintf(stderr, "\n");
3054 cf_open(capture_file *cf, const char *fname, gboolean is_tempfile, int *err)
3058 char err_msg[2048+1];
3060 wth = wtap_open_offline(fname, err, &err_info, FALSE);
3064 /* The open succeeded. Fill in the information for this file. */
3066 /* Initialize all data structures used for dissection. */
3070 cf->f_datalen = 0; /* not used, but set it anyway */
3072 /* Set the file name because we need it to set the follow stream filter.
3073 XXX - is that still true? We need it for other reasons, though,
3075 cf->filename = g_strdup(fname);
3077 /* Indicate whether it's a permanent or temporary file. */
3078 cf->is_tempfile = is_tempfile;
3080 /* If it's a temporary capture buffer file, mark it as not saved. */
3081 cf->user_saved = !is_tempfile;
3083 cf->cd_t = wtap_file_type(cf->wth);
3085 cf->drops_known = FALSE;
3087 cf->snap = wtap_snapshot_length(cf->wth);
3088 if (cf->snap == 0) {
3089 /* Snapshot length not known. */
3090 cf->has_snap = FALSE;
3091 cf->snap = WTAP_MAX_PACKET_SIZE;
3093 cf->has_snap = TRUE;
3094 nstime_set_zero(&cf->elapsed_time);
3095 nstime_set_unset(&first_ts);
3096 nstime_set_unset(&prev_dis_ts);
3097 nstime_set_unset(&prev_cap_ts);
3102 g_snprintf(err_msg, sizeof err_msg,
3103 cf_open_error_message(*err, err_info, FALSE, cf->cd_t), fname);
3104 cmdarg_err("%s", err_msg);
3110 * General errors are reported with an console message in TShark.
3113 failure_message(const char *msg_format, va_list ap)
3115 fprintf(stderr, "tshark: ");
3116 vfprintf(stderr, msg_format, ap);
3117 fprintf(stderr, "\n");
3121 * Read errors are reported with an console message in TShark.
3124 read_failure_message(const char *filename, int err)
3126 cmdarg_err("An error occurred while reading from the file \"%s\": %s.",
3127 filename, strerror(err));
3131 * Report an error in command-line arguments.
3134 cmdarg_err(const char *fmt, ...)
3139 failure_message(fmt, ap);
3144 * Report additional information for an error in command-line arguments.
3147 cmdarg_err_cont(const char *fmt, ...)
3152 vfprintf(stderr, fmt, ap);
3153 fprintf(stderr, "\n");